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<h1>Hardware Parameters<br/>
<small>
[<a class="el" href="group___p_c_m.html">PCM Interface</a>]</small>
</h1><table border="0" cellpadding="0" cellspacing="0">
<tr><td colspan="2"><h2>Defines</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#ga06b83cb9a788f99b7b09b570b4355cee">snd_pcm_hw_params_alloca</a>(ptr)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">allocate an invalid <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> using standard alloca <a href="#ga06b83cb9a788f99b7b09b570b4355cee"></a><br/></td></tr>
<tr><td colspan="2"><h2>Functions</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#ga6e2dd8efbb7a4084bd05e6cc458d84f7">snd_pcm_hw_params_any</a> (<a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> *pcm, <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Fill params with a full configuration space for a PCM. <a href="#ga6e2dd8efbb7a4084bd05e6cc458d84f7"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#ga53b3b351bc5db48da18d5f36b98f79a9">snd_pcm_hw_params_can_mmap_sample_resolution</a> (const <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Check, if hardware supports sample-resolution mmap for given configuration. <a href="#ga53b3b351bc5db48da18d5f36b98f79a9"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#ga3bfe71142e72dffb274f8ba9ef7edeee">snd_pcm_hw_params_is_double</a> (const <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Check, if hardware does double buffering for start/stop for given configuration. <a href="#ga3bfe71142e72dffb274f8ba9ef7edeee"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#ga366395c87f811d8ab8df83dc8a8a8124">snd_pcm_hw_params_is_batch</a> (const <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Check, if hardware does double buffering for data transfers for given configuration. <a href="#ga366395c87f811d8ab8df83dc8a8a8124"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#gac511eb0d4db6f1e8303161486061fe14">snd_pcm_hw_params_is_block_transfer</a> (const <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Check, if hardware does block transfers for samples for given configuration. <a href="#gac511eb0d4db6f1e8303161486061fe14"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#ga7a129f7671fee8c0ced42d64a6c2379d">snd_pcm_hw_params_is_monotonic</a> (const <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Check, if timestamps are monotonic for given configuration. <a href="#ga7a129f7671fee8c0ced42d64a6c2379d"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#gacb214bcb2af7462195da73b060206800">snd_pcm_hw_params_can_overrange</a> (const <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Check, if hardware supports overrange detection. <a href="#gacb214bcb2af7462195da73b060206800"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#gaad4ba98b2f66baa5360b9a85f064a3e9">snd_pcm_hw_params_can_pause</a> (const <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Check, if hardware supports pause. <a href="#gaad4ba98b2f66baa5360b9a85f064a3e9"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#ga6b79539a34e6f51972f4c32b3296585a">snd_pcm_hw_params_can_resume</a> (const <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Check, if hardware supports resume. <a href="#ga6b79539a34e6f51972f4c32b3296585a"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#gabaf7b36cfb700973fe8d89971f0f967b">snd_pcm_hw_params_is_half_duplex</a> (const <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Check, if hardware does half-duplex only. <a href="#gabaf7b36cfb700973fe8d89971f0f967b"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#gae8768da025e34e3c3c6b5a5dfdcd2ad4">snd_pcm_hw_params_is_joint_duplex</a> (const <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Check, if hardware does joint-duplex (playback and capture are somewhat correlated). <a href="#gae8768da025e34e3c3c6b5a5dfdcd2ad4"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#gafcea258e7d9b6094350699367f2ef9b5">snd_pcm_hw_params_can_sync_start</a> (const <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Check, if hardware supports synchronized start with sample resolution. <a href="#gafcea258e7d9b6094350699367f2ef9b5"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#ga556ddf9731e184cb635994f739a6efe3">snd_pcm_hw_params_get_rate_numden</a> (const <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params, unsigned int *rate_num, unsigned int *rate_den)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Get rate exact info from a configuration space. <a href="#ga556ddf9731e184cb635994f739a6efe3"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#ga8bb1180b62a4225f0e094b95ac5d3674">snd_pcm_hw_params_get_sbits</a> (const <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Get sample resolution info from a configuration space. <a href="#ga8bb1180b62a4225f0e094b95ac5d3674"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#ga12fe3e1ca110fd61cff685890366c743">snd_pcm_hw_params_get_fifo_size</a> (const <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Get hard are FIFO size info from a configuration space. <a href="#ga12fe3e1ca110fd61cff685890366c743"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">size_t </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#ga092e6c110ad7b4e52855b9522e437ed9">snd_pcm_hw_params_sizeof</a> (void)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">get size of <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> <a href="#ga092e6c110ad7b4e52855b9522e437ed9"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#ga6e53d09a9c7cc3f2a692c0af99886237">snd_pcm_hw_params_malloc</a> (<a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> **ptr)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">allocate an invalid <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> using standard malloc <a href="#ga6e53d09a9c7cc3f2a692c0af99886237"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#ga8c094063e7a13be0b9a043be8616a181">snd_pcm_hw_params_free</a> (<a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *obj)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">frees a previously allocated <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> <a href="#ga8c094063e7a13be0b9a043be8616a181"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#ga9bcedf4bb4b21527a584846a5986a1f4">snd_pcm_hw_params_copy</a> (<a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *dst, const <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *src)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">copy one <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> to another <a href="#ga9bcedf4bb4b21527a584846a5986a1f4"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#ga752e62bb419c7ebe151f8023f5eed1f9">snd_pcm_hw_params_get_access</a> (const <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params, <a class="el" href="group___p_c_m.html#ga661221ba5e8f1d6eaf4ab8e2da57cc1a">snd_pcm_access_t</a> *_access)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Extract access type from a configuration space. <a href="#ga752e62bb419c7ebe151f8023f5eed1f9"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#gab56553ff541e6e9ddae397f6faba840f">snd_pcm_hw_params_test_access</a> (<a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> *pcm, <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params, <a class="el" href="group___p_c_m.html#ga661221ba5e8f1d6eaf4ab8e2da57cc1a">snd_pcm_access_t</a> _access)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Verify if an access type is available inside a configuration space for a PCM. <a href="#gab56553ff541e6e9ddae397f6faba840f"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#ga4c8f1c632931923531ca68ee048a8de8">snd_pcm_hw_params_set_access</a> (<a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> *pcm, <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params, <a class="el" href="group___p_c_m.html#ga661221ba5e8f1d6eaf4ab8e2da57cc1a">snd_pcm_access_t</a> _access)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Restrict a configuration space to contain only one access type. <a href="#ga4c8f1c632931923531ca68ee048a8de8"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#ga2fd545bdf469d54cff6a038e31ce56ce">snd_pcm_hw_params_set_access_first</a> (<a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> *pcm, <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params, <a class="el" href="group___p_c_m.html#ga661221ba5e8f1d6eaf4ab8e2da57cc1a">snd_pcm_access_t</a> *_access)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Restrict a configuration space to contain only its first access type. <a href="#ga2fd545bdf469d54cff6a038e31ce56ce"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#ga172b949e37f28da5a102e56b04f69be3">snd_pcm_hw_params_set_access_last</a> (<a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> *pcm, <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params, <a class="el" href="group___p_c_m.html#ga661221ba5e8f1d6eaf4ab8e2da57cc1a">snd_pcm_access_t</a> *_access)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Restrict a configuration space to contain only its last access type. <a href="#ga172b949e37f28da5a102e56b04f69be3"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#gad54808a277db646cbc21be07efc31000">snd_pcm_hw_params_set_access_mask</a> (<a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> *pcm, <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params, <a class="el" href="group___p_c_m.html#ga7f9575bcc94c7c2cf5d688a45c16ffba">snd_pcm_access_mask_t</a> *mask)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Restrict a configuration space to contain only a set of access types. <a href="#gad54808a277db646cbc21be07efc31000"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#ga20079e218c9307e4e683f0743f3af38c">snd_pcm_hw_params_get_access_mask</a> (<a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params, <a class="el" href="group___p_c_m.html#ga7f9575bcc94c7c2cf5d688a45c16ffba">snd_pcm_access_mask_t</a> *mask)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Get access mask from a configuration space. <a href="#ga20079e218c9307e4e683f0743f3af38c"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#ga66b28dd4f26d603e923a3577d1a2e98f">snd_pcm_hw_params_get_format</a> (const <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params, <a class="el" href="group___p_c_m.html#gaa14b7f26877a812acbb39811364177f8">snd_pcm_format_t</a> *val)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Extract format from a configuration space. <a href="#ga66b28dd4f26d603e923a3577d1a2e98f"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#ga64e1a5143bbd72c8f5cffca828d506ef">snd_pcm_hw_params_test_format</a> (<a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> *pcm, <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params, <a class="el" href="group___p_c_m.html#gaa14b7f26877a812acbb39811364177f8">snd_pcm_format_t</a> val)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Verify if a format is available inside a configuration space for a PCM. <a href="#ga64e1a5143bbd72c8f5cffca828d506ef"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#ga6014e0e1ec7934f8c745290e83e59199">snd_pcm_hw_params_set_format</a> (<a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> *pcm, <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params, <a class="el" href="group___p_c_m.html#gaa14b7f26877a812acbb39811364177f8">snd_pcm_format_t</a> val)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Restrict a configuration space to contain only one format. <a href="#ga6014e0e1ec7934f8c745290e83e59199"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#ga762ee356cc687c81c206df3c18245e4a">snd_pcm_hw_params_set_format_first</a> (<a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> *pcm, <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params, <a class="el" href="group___p_c_m.html#gaa14b7f26877a812acbb39811364177f8">snd_pcm_format_t</a> *format)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Restrict a configuration space to contain only its first format. <a href="#ga762ee356cc687c81c206df3c18245e4a"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#ga4a643db96742a3da0287eda6cc3eafa2">snd_pcm_hw_params_set_format_last</a> (<a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> *pcm, <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params, <a class="el" href="group___p_c_m.html#gaa14b7f26877a812acbb39811364177f8">snd_pcm_format_t</a> *format)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Restrict a configuration space to contain only its last format. <a href="#ga4a643db96742a3da0287eda6cc3eafa2"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#ga33261bd41636eb28fd42493e4ea4efba">snd_pcm_hw_params_set_format_mask</a> (<a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> *pcm, <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params, <a class="el" href="group___p_c_m.html#ga0936aa9ac0051a3611583a2740915545">snd_pcm_format_mask_t</a> *mask)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Restrict a configuration space to contain only a set of formats. <a href="#ga33261bd41636eb28fd42493e4ea4efba"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#ga43bdf7596f8722fb6b8edbeaf1aebd90">snd_pcm_hw_params_get_format_mask</a> (<a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params, <a class="el" href="group___p_c_m.html#ga0936aa9ac0051a3611583a2740915545">snd_pcm_format_mask_t</a> *mask)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Get format mask from a configuration space. <a href="#ga43bdf7596f8722fb6b8edbeaf1aebd90"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#ga77a934515c24e17cfb0af21a8b2e0690">snd_pcm_hw_params_get_subformat</a> (const <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params, <a class="el" href="group___p_c_m.html#ga1e5fe73a6bdf881e2f91921d5e5327c7">snd_pcm_subformat_t</a> *subformat)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Extract subformat from a configuration space. <a href="#ga77a934515c24e17cfb0af21a8b2e0690"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#gaf5062e723956551092db201f34c99495">snd_pcm_hw_params_test_subformat</a> (<a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> *pcm, <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params, <a class="el" href="group___p_c_m.html#ga1e5fe73a6bdf881e2f91921d5e5327c7">snd_pcm_subformat_t</a> subformat)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Verify if a subformat is available inside a configuration space for a PCM. <a href="#gaf5062e723956551092db201f34c99495"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#ga08dfde7d1fc6a0a56609f3ec40ed26e2">snd_pcm_hw_params_set_subformat</a> (<a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> *pcm, <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params, <a class="el" href="group___p_c_m.html#ga1e5fe73a6bdf881e2f91921d5e5327c7">snd_pcm_subformat_t</a> subformat)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Restrict a configuration space to contain only one subformat. <a href="#ga08dfde7d1fc6a0a56609f3ec40ed26e2"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#ga12b745bdf119127f2216d61a2bd28688">snd_pcm_hw_params_set_subformat_first</a> (<a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> *pcm, <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params, <a class="el" href="group___p_c_m.html#ga1e5fe73a6bdf881e2f91921d5e5327c7">snd_pcm_subformat_t</a> *subformat)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Restrict a configuration space to contain only its first subformat. <a href="#ga12b745bdf119127f2216d61a2bd28688"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#gab1a02fff3ef394da274d2b2652df856d">snd_pcm_hw_params_set_subformat_last</a> (<a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> *pcm, <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params, <a class="el" href="group___p_c_m.html#ga1e5fe73a6bdf881e2f91921d5e5327c7">snd_pcm_subformat_t</a> *subformat)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Restrict a configuration space to contain only its last subformat. <a href="#gab1a02fff3ef394da274d2b2652df856d"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#ga3ebc4625b258df82164dc9220a9f9117">snd_pcm_hw_params_set_subformat_mask</a> (<a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> *pcm, <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params, <a class="el" href="group___p_c_m.html#ga891b054202089747199bc3348b9d9630">snd_pcm_subformat_mask_t</a> *mask)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Restrict a configuration space to contain only a set of subformats. <a href="#ga3ebc4625b258df82164dc9220a9f9117"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#gaafee81722f5bcba41e16e4c7a77059c2">snd_pcm_hw_params_get_subformat_mask</a> (<a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params, <a class="el" href="group___p_c_m.html#ga891b054202089747199bc3348b9d9630">snd_pcm_subformat_mask_t</a> *mask)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Get subformat mask from a configuration space. <a href="#gaafee81722f5bcba41e16e4c7a77059c2"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#gae27e04757272070197e00c0dfec5dc97">snd_pcm_hw_params_get_channels</a> (const <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params, unsigned int *val)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Extract channels from a configuration space. <a href="#gae27e04757272070197e00c0dfec5dc97"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#ga93326349bbb91840a3e0bafef0390cb1">snd_pcm_hw_params_get_channels_min</a> (const <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params, unsigned int *val)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Extract minimum channels count from a configuration space. <a href="#ga93326349bbb91840a3e0bafef0390cb1"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#gac6c37a5da7dc8cb19fdd8e9cf1bd673d">snd_pcm_hw_params_get_channels_max</a> (const <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params, unsigned int *val)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Extract maximum channels count from a configuration space. <a href="#gac6c37a5da7dc8cb19fdd8e9cf1bd673d"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#ga8fabc38d770ad922e5b4e0338e7fb242">snd_pcm_hw_params_test_channels</a> (<a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> *pcm, <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params, unsigned int val)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Verify if a channels count is available inside a configuration space for a PCM. <a href="#ga8fabc38d770ad922e5b4e0338e7fb242"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#ga3a5b2a05c5d9869cc743dac71c0d270a">snd_pcm_hw_params_set_channels</a> (<a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> *pcm, <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params, unsigned int val)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Restrict a configuration space to contain only one channels count. <a href="#ga3a5b2a05c5d9869cc743dac71c0d270a"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#ga155b8ac646b90560cd00f195086ff464">snd_pcm_hw_params_set_channels_min</a> (<a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> *pcm, <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params, unsigned int *val)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Restrict a configuration space with a minimum channels count. <a href="#ga155b8ac646b90560cd00f195086ff464"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#ga739d51d0822f182a6583a5436f410b34">snd_pcm_hw_params_set_channels_max</a> (<a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> *pcm, <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params, unsigned int *val)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Restrict a configuration space with a maximum channels count. <a href="#ga739d51d0822f182a6583a5436f410b34"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#ga24e507c965aff4984aa4969cc896e830">snd_pcm_hw_params_set_channels_minmax</a> (<a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> *pcm, <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params, unsigned int *min, unsigned int *max)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Restrict a configuration space to have channels counts in a given range. <a href="#ga24e507c965aff4984aa4969cc896e830"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#ga59aa9e1a02f4ce616fe92c605a833f8f">snd_pcm_hw_params_set_channels_near</a> (<a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> *pcm, <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params, unsigned int *val)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Restrict a configuration space to have channels count nearest to a target. <a href="#ga59aa9e1a02f4ce616fe92c605a833f8f"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#gae08e3371d3d2e8e512537630a59f9a55">snd_pcm_hw_params_set_channels_first</a> (<a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> *pcm, <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params, unsigned int *val)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Restrict a configuration space to contain only its minimum channels count. <a href="#gae08e3371d3d2e8e512537630a59f9a55"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#ga54846380c1dc99ee9124d45232931ebd">snd_pcm_hw_params_set_channels_last</a> (<a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> *pcm, <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params, unsigned int *val)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Restrict a configuration space to contain only its maximum channels count. <a href="#ga54846380c1dc99ee9124d45232931ebd"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#ga4279c4b45a15f7e282e436e75d6ba13a">snd_pcm_hw_params_get_rate</a> (const <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params, unsigned int *val, int *dir)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Extract rate from a configuration space. <a href="#ga4279c4b45a15f7e282e436e75d6ba13a"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#gaf7801fdf88fa51ca96fe97d3211db3f7">snd_pcm_hw_params_get_rate_min</a> (const <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params, unsigned int *val, int *dir)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Extract minimum rate from a configuration space. <a href="#gaf7801fdf88fa51ca96fe97d3211db3f7"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#ga6770c2b988c8dc91eb51893cc145aa2c">snd_pcm_hw_params_get_rate_max</a> (const <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params, unsigned int *val, int *dir)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Extract maximum rate from a configuration space. <a href="#ga6770c2b988c8dc91eb51893cc145aa2c"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#ga5f09b37dd6f4c213029f8f39e00137a3">snd_pcm_hw_params_test_rate</a> (<a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> *pcm, <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params, unsigned int val, int dir)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Verify if a rate is available inside a configuration space for a PCM. <a href="#ga5f09b37dd6f4c213029f8f39e00137a3"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#ga29cd2571738847813af1489043d1af5a">snd_pcm_hw_params_set_rate</a> (<a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> *pcm, <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params, unsigned int val, int dir)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Restrict a configuration space to contain only one rate. <a href="#ga29cd2571738847813af1489043d1af5a"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#ga89374ae29dd924915ada6f26cd9a3292">snd_pcm_hw_params_set_rate_min</a> (<a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> *pcm, <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params, unsigned int *val, int *dir)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Restrict a configuration space with a minimum rate. <a href="#ga89374ae29dd924915ada6f26cd9a3292"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#ga8701776750b18b2dad19a4115791c2f0">snd_pcm_hw_params_set_rate_max</a> (<a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> *pcm, <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params, unsigned int *val, int *dir)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Restrict a configuration space with a maximum rate. <a href="#ga8701776750b18b2dad19a4115791c2f0"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#ga03795a2ee03be25a30185b26a1bc3e21">snd_pcm_hw_params_set_rate_minmax</a> (<a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> *pcm, <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params, unsigned int *min, int *mindir, unsigned int *max, int *maxdir)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Restrict a configuration space to have rates in a given range. <a href="#ga03795a2ee03be25a30185b26a1bc3e21"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#ga39124280d06ce63092a77e3f25ddd6ee">snd_pcm_hw_params_set_rate_near</a> (<a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> *pcm, <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params, unsigned int *val, int *dir)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Restrict a configuration space to have rate nearest to a target. <a href="#ga39124280d06ce63092a77e3f25ddd6ee"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#gac0ded856c76459608fdd5ea0f254349e">snd_pcm_hw_params_set_rate_first</a> (<a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> *pcm, <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params, unsigned int *val, int *dir)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Restrict a configuration space to contain only its minimum rate. <a href="#gac0ded856c76459608fdd5ea0f254349e"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#ga5d90a5204061482be45ac4e0d2b10e49">snd_pcm_hw_params_set_rate_last</a> (<a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> *pcm, <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params, unsigned int *val, int *dir)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Restrict a configuration space to contain only its maximum rate. <a href="#ga5d90a5204061482be45ac4e0d2b10e49"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#ga82eecc0e27a94ce0caa195cc3765536c">snd_pcm_hw_params_set_rate_resample</a> (<a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> *pcm, <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params, unsigned int val)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Restrict a configuration space to contain only real hardware rates. <a href="#ga82eecc0e27a94ce0caa195cc3765536c"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#gacaa53b05cd5e4f55eeb4d5ea64129c21">snd_pcm_hw_params_get_rate_resample</a> (<a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> *pcm, <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params, unsigned int *val)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Extract resample state from a configuration space. <a href="#gacaa53b05cd5e4f55eeb4d5ea64129c21"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#ga2c0b6b22bbeed5da06293608f3be844d">snd_pcm_hw_params_set_export_buffer</a> (<a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> *pcm, <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params, unsigned int val)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Restrict a configuration space to allow the buffer accessible from outside. <a href="#ga2c0b6b22bbeed5da06293608f3be844d"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#gafec078cf053a87339ba91c0f605dca54">snd_pcm_hw_params_get_export_buffer</a> (<a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> *pcm, <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params, unsigned int *val)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Extract buffer accessibility from a configuration space. <a href="#gafec078cf053a87339ba91c0f605dca54"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#ga71f5d43bf63dc7292b8b58f17acccf89">snd_pcm_hw_params_get_period_time</a> (const <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params, unsigned int *val, int *dir)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Extract period time from a configuration space. <a href="#ga71f5d43bf63dc7292b8b58f17acccf89"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#gae68d4b168ef5d40f644a1a4ed854689f">snd_pcm_hw_params_get_period_time_min</a> (const <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params, unsigned int *val, int *dir)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Extract minimum period time from a configuration space. <a href="#gae68d4b168ef5d40f644a1a4ed854689f"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#ga74b510f4958e90a83a631a1eeedf13e0">snd_pcm_hw_params_get_period_time_max</a> (const <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params, unsigned int *val, int *dir)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Extract maximum period time from a configuration space. <a href="#ga74b510f4958e90a83a631a1eeedf13e0"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#gaf1f6452ad189be5c4e1ab3bd86f2f6d2">snd_pcm_hw_params_test_period_time</a> (<a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> *pcm, <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params, unsigned int val, int dir)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Verify if a period time is available inside a configuration space for a PCM. <a href="#gaf1f6452ad189be5c4e1ab3bd86f2f6d2"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#gaa2bc2a32d3971521064741a30e10c92f">snd_pcm_hw_params_set_period_time</a> (<a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> *pcm, <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params, unsigned int val, int dir)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Restrict a configuration space to contain only one period time. <a href="#gaa2bc2a32d3971521064741a30e10c92f"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#ga2dc9fcdb1b30126a20d96a65c7826d9b">snd_pcm_hw_params_set_period_time_min</a> (<a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> *pcm, <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params, unsigned int *val, int *dir)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Restrict a configuration space with a minimum period time. <a href="#ga2dc9fcdb1b30126a20d96a65c7826d9b"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#gaad53e3af1f1fe522c3d902f5403954d1">snd_pcm_hw_params_set_period_time_max</a> (<a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> *pcm, <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params, unsigned int *val, int *dir)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Restrict a configuration space with a maximum period time. <a href="#gaad53e3af1f1fe522c3d902f5403954d1"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#ga993e05e43a31a6151427ba1f793c0b3a">snd_pcm_hw_params_set_period_time_minmax</a> (<a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> *pcm, <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params, unsigned int *min, int *mindir, unsigned int *max, int *maxdir)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Restrict a configuration space to have period times in a given range. <a href="#ga993e05e43a31a6151427ba1f793c0b3a"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#gaa22d4f917c300b0c1f47b348c23705a4">snd_pcm_hw_params_set_period_time_near</a> (<a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> *pcm, <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params, unsigned int *val, int *dir)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Restrict a configuration space to have period time nearest to a target. <a href="#gaa22d4f917c300b0c1f47b348c23705a4"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#ga478e50e1fa7395af70100b906c31cb67">snd_pcm_hw_params_set_period_time_first</a> (<a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> *pcm, <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params, unsigned int *val, int *dir)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Restrict a configuration space to contain only its minimum period time. <a href="#ga478e50e1fa7395af70100b906c31cb67"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#ga2d48b4bee369912b0fc9b245d6c7a52d">snd_pcm_hw_params_set_period_time_last</a> (<a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> *pcm, <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params, unsigned int *val, int *dir)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Restrict a configuration space to contain only its maximum period time. <a href="#ga2d48b4bee369912b0fc9b245d6c7a52d"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#gaba48ea189171536f9793e0d99e6db5e0">snd_pcm_hw_params_get_period_size</a> (const <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params, <a class="el" href="group___p_c_m.html#gab01fcfe9b97382a8d3f2027c664b8b8a">snd_pcm_uframes_t</a> *frames, int *dir)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Extract period size from a configuration space. <a href="#gaba48ea189171536f9793e0d99e6db5e0"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#ga3f6fe37605b54d0a25e8bf1d10f71ae4">snd_pcm_hw_params_get_period_size_min</a> (const <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params, <a class="el" href="group___p_c_m.html#gab01fcfe9b97382a8d3f2027c664b8b8a">snd_pcm_uframes_t</a> *frames, int *dir)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Extract minimum period size from a configuration space. <a href="#ga3f6fe37605b54d0a25e8bf1d10f71ae4"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#gab5c16621ae697e5ee6f442ec7b7062c5">snd_pcm_hw_params_get_period_size_max</a> (const <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params, <a class="el" href="group___p_c_m.html#gab01fcfe9b97382a8d3f2027c664b8b8a">snd_pcm_uframes_t</a> *frames, int *dir)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Extract maximum period size from a configuration space. <a href="#gab5c16621ae697e5ee6f442ec7b7062c5"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#gabc8712dab6cb135176de77f374d7ee17">snd_pcm_hw_params_test_period_size</a> (<a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> *pcm, <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params, <a class="el" href="group___p_c_m.html#gab01fcfe9b97382a8d3f2027c664b8b8a">snd_pcm_uframes_t</a> val, int dir)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Verify if a period size is available inside a configuration space for a PCM. <a href="#gabc8712dab6cb135176de77f374d7ee17"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#ga874c977dd9aac275c87a7b1c33a0dec0">snd_pcm_hw_params_set_period_size</a> (<a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> *pcm, <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params, <a class="el" href="group___p_c_m.html#gab01fcfe9b97382a8d3f2027c664b8b8a">snd_pcm_uframes_t</a> val, int dir)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Restrict a configuration space to contain only one period size. <a href="#ga874c977dd9aac275c87a7b1c33a0dec0"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#ga58e0468994d935f08080d9654f1b48b8">snd_pcm_hw_params_set_period_size_min</a> (<a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> *pcm, <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params, <a class="el" href="group___p_c_m.html#gab01fcfe9b97382a8d3f2027c664b8b8a">snd_pcm_uframes_t</a> *val, int *dir)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Restrict a configuration space with a minimum period size. <a href="#ga58e0468994d935f08080d9654f1b48b8"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#ga909f442c3d8c20b79de2edf6cc5ded41">snd_pcm_hw_params_set_period_size_max</a> (<a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> *pcm, <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params, <a class="el" href="group___p_c_m.html#gab01fcfe9b97382a8d3f2027c664b8b8a">snd_pcm_uframes_t</a> *val, int *dir)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Restrict a configuration space with a maximum period size. <a href="#ga909f442c3d8c20b79de2edf6cc5ded41"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#ga33c901f8364cb2533d6cdeba732e0e4e">snd_pcm_hw_params_set_period_size_minmax</a> (<a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> *pcm, <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params, <a class="el" href="group___p_c_m.html#gab01fcfe9b97382a8d3f2027c664b8b8a">snd_pcm_uframes_t</a> *min, int *mindir, <a class="el" href="group___p_c_m.html#gab01fcfe9b97382a8d3f2027c664b8b8a">snd_pcm_uframes_t</a> *max, int *maxdir)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Restrict a configuration space to have period sizes in a given range. <a href="#ga33c901f8364cb2533d6cdeba732e0e4e"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#ga9162045265f283c532634506456cab09">snd_pcm_hw_params_set_period_size_near</a> (<a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> *pcm, <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params, <a class="el" href="group___p_c_m.html#gab01fcfe9b97382a8d3f2027c664b8b8a">snd_pcm_uframes_t</a> *val, int *dir)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Restrict a configuration space to have period size nearest to a target. <a href="#ga9162045265f283c532634506456cab09"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#gaf74bbb66a71ece8260be20502822335b">snd_pcm_hw_params_set_period_size_first</a> (<a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> *pcm, <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params, <a class="el" href="group___p_c_m.html#gab01fcfe9b97382a8d3f2027c664b8b8a">snd_pcm_uframes_t</a> *val, int *dir)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Restrict a configuration space to contain only its minimum period size. <a href="#gaf74bbb66a71ece8260be20502822335b"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#gad0bce0ad23b3b708858bb20df81e09a2">snd_pcm_hw_params_set_period_size_last</a> (<a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> *pcm, <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params, <a class="el" href="group___p_c_m.html#gab01fcfe9b97382a8d3f2027c664b8b8a">snd_pcm_uframes_t</a> *val, int *dir)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Restrict a configuration space to contain only its maximum period size. <a href="#gad0bce0ad23b3b708858bb20df81e09a2"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#ga13bc85ca5fe34b19112579a7e27cf41a">snd_pcm_hw_params_set_period_size_integer</a> (<a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> *pcm, <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Restrict a configuration space to contain only integer period sizes. <a href="#ga13bc85ca5fe34b19112579a7e27cf41a"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#ga7242d7045ae23a9ae736c191030c25e8">snd_pcm_hw_params_get_periods</a> (const <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params, unsigned int *val, int *dir)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Extract periods from a configuration space. <a href="#ga7242d7045ae23a9ae736c191030c25e8"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#ga17f3826360b0fe1f47c696388d25ac93">snd_pcm_hw_params_get_periods_min</a> (const <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params, unsigned int *val, int *dir)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Extract minimum periods count from a configuration space. <a href="#ga17f3826360b0fe1f47c696388d25ac93"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#ga60417687267cd6ddc56a9c15179fe275">snd_pcm_hw_params_get_periods_max</a> (const <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params, unsigned int *val, int *dir)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Extract maximum periods count from a configuration space. <a href="#ga60417687267cd6ddc56a9c15179fe275"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#ga0de7350f433935a995d439fe38f55088">snd_pcm_hw_params_test_periods</a> (<a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> *pcm, <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params, unsigned int val, int dir)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Verify if a periods count is available inside a configuration space for a PCM. <a href="#ga0de7350f433935a995d439fe38f55088"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#ga472aa3f2d8ce4040caa874fe60aba961">snd_pcm_hw_params_set_periods</a> (<a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> *pcm, <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params, unsigned int val, int dir)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Restrict a configuration space to contain only one periods count. <a href="#ga472aa3f2d8ce4040caa874fe60aba961"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#gaa2642b54ed1c2e26e595ecf3d5b29edc">snd_pcm_hw_params_set_periods_min</a> (<a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> *pcm, <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params, unsigned int *val, int *dir)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Restrict a configuration space with a minimum periods count. <a href="#gaa2642b54ed1c2e26e595ecf3d5b29edc"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#ga636d1d9a6333fb2acc8a6e84391ea0a6">snd_pcm_hw_params_set_periods_max</a> (<a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> *pcm, <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params, unsigned int *val, int *dir)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Restrict a configuration space with a maximum periods count. <a href="#ga636d1d9a6333fb2acc8a6e84391ea0a6"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#gaf638d94e53872415d3bb6d9169104891">snd_pcm_hw_params_set_periods_minmax</a> (<a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> *pcm, <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params, unsigned int *min, int *mindir, unsigned int *max, int *maxdir)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Restrict a configuration space to have periods counts in a given range. <a href="#gaf638d94e53872415d3bb6d9169104891"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#ga2fadb73803f58b900ac34846c14894ca">snd_pcm_hw_params_set_periods_near</a> (<a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> *pcm, <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params, unsigned int *val, int *dir)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Restrict a configuration space to have periods count nearest to a target. <a href="#ga2fadb73803f58b900ac34846c14894ca"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#gaa8fbd81ce54fac30f60768fb36210a6f">snd_pcm_hw_params_set_periods_first</a> (<a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> *pcm, <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params, unsigned int *val, int *dir)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Restrict a configuration space to contain only its minimum periods count. <a href="#gaa8fbd81ce54fac30f60768fb36210a6f"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#ga1366dd00b920ef459d2dbf8a64408725">snd_pcm_hw_params_set_periods_last</a> (<a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> *pcm, <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params, unsigned int *val, int *dir)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Restrict a configuration space to contain only its maximum periods count. <a href="#ga1366dd00b920ef459d2dbf8a64408725"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#gab7356d30758dfcf11ff5874fd033913b">snd_pcm_hw_params_set_periods_integer</a> (<a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> *pcm, <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Restrict a configuration space to contain only integer periods counts. <a href="#gab7356d30758dfcf11ff5874fd033913b"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#gabdea994550dbf7ab176e3c90baa3a30b">snd_pcm_hw_params_get_buffer_time</a> (const <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params, unsigned int *val, int *dir)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Extract buffer time from a configuration space. <a href="#gabdea994550dbf7ab176e3c90baa3a30b"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#gaa18c9999c27632f6c47e163b6af17fa9">snd_pcm_hw_params_get_buffer_time_min</a> (const <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params, unsigned int *val, int *dir)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Extract minimum buffer time from a configuration space. <a href="#gaa18c9999c27632f6c47e163b6af17fa9"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#ga67a33176f4f05231863b37b09527c0e3">snd_pcm_hw_params_get_buffer_time_max</a> (const <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params, unsigned int *val, int *dir)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Extract maximum buffer time from a configuration space. <a href="#ga67a33176f4f05231863b37b09527c0e3"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#ga9b6bf73e2a0b7f887f3d7d85a988eb7e">snd_pcm_hw_params_test_buffer_time</a> (<a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> *pcm, <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params, unsigned int val, int dir)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Verify if a buffer time is available inside a configuration space for a PCM. <a href="#ga9b6bf73e2a0b7f887f3d7d85a988eb7e"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#gacad42b93e31bca4c9b4074d6ec236d99">snd_pcm_hw_params_set_buffer_time</a> (<a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> *pcm, <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params, unsigned int val, int dir)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Restrict a configuration space to contain only one buffer time. <a href="#gacad42b93e31bca4c9b4074d6ec236d99"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#ga2a7cb8c29b2fb75b615366dd40a7dc13">snd_pcm_hw_params_set_buffer_time_min</a> (<a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> *pcm, <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params, unsigned int *val, int *dir)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Restrict a configuration space with a minimum buffer time. <a href="#ga2a7cb8c29b2fb75b615366dd40a7dc13"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#gab80680ff70b72435addde58e88fc1d7b">snd_pcm_hw_params_set_buffer_time_max</a> (<a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> *pcm, <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params, unsigned int *val, int *dir)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Restrict a configuration space with a maximum buffer time. <a href="#gab80680ff70b72435addde58e88fc1d7b"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#ga84964e55717a7db70b55f320b56f343f">snd_pcm_hw_params_set_buffer_time_minmax</a> (<a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> *pcm, <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params, unsigned int *min, int *mindir, unsigned int *max, int *maxdir)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Restrict a configuration space to have buffer times in a given range. <a href="#ga84964e55717a7db70b55f320b56f343f"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#ga3bc1b188576d6d2daae9c56024813d10">snd_pcm_hw_params_set_buffer_time_near</a> (<a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> *pcm, <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params, unsigned int *val, int *dir)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Restrict a configuration space to have buffer time nearest to a target. <a href="#ga3bc1b188576d6d2daae9c56024813d10"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#ga6a29e5f80671ca89d0c185416b5a6c2c">snd_pcm_hw_params_set_buffer_time_first</a> (<a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> *pcm, <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params, unsigned int *val, int *dir)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Restrict a configuration space to contain only its minimum buffer time. <a href="#ga6a29e5f80671ca89d0c185416b5a6c2c"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#gaec8788f14a0c5452dada23a49cdd4b71">snd_pcm_hw_params_set_buffer_time_last</a> (<a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> *pcm, <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params, unsigned int *val, int *dir)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Restrict a configuration space to contain only its maximum buffered time. <a href="#gaec8788f14a0c5452dada23a49cdd4b71"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#gab6556fcaaf926360d2064044a6f6cfb4">snd_pcm_hw_params_get_buffer_size</a> (const <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params, <a class="el" href="group___p_c_m.html#gab01fcfe9b97382a8d3f2027c664b8b8a">snd_pcm_uframes_t</a> *val)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Extract buffer size from a configuration space. <a href="#gab6556fcaaf926360d2064044a6f6cfb4"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#ga182adecca0ad204a34b27cdaa9d4f672">snd_pcm_hw_params_get_buffer_size_min</a> (const <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params, <a class="el" href="group___p_c_m.html#gab01fcfe9b97382a8d3f2027c664b8b8a">snd_pcm_uframes_t</a> *val)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Extract minimum buffer size from a configuration space. <a href="#ga182adecca0ad204a34b27cdaa9d4f672"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#ga3caf61ab086028067b602d48182df708">snd_pcm_hw_params_get_buffer_size_max</a> (const <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params, <a class="el" href="group___p_c_m.html#gab01fcfe9b97382a8d3f2027c664b8b8a">snd_pcm_uframes_t</a> *val)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Extract maximum buffer size from a configuration space. <a href="#ga3caf61ab086028067b602d48182df708"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#ga3ce81a7fe9f677849881f1cfd3b5cb7e">snd_pcm_hw_params_test_buffer_size</a> (<a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> *pcm, <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params, <a class="el" href="group___p_c_m.html#gab01fcfe9b97382a8d3f2027c664b8b8a">snd_pcm_uframes_t</a> val)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Verify if a buffer size is available inside a configuration space for a PCM. <a href="#ga3ce81a7fe9f677849881f1cfd3b5cb7e"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#ga828cf9e11fe84137c2c8d4938a6fca7f">snd_pcm_hw_params_set_buffer_size</a> (<a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> *pcm, <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params, <a class="el" href="group___p_c_m.html#gab01fcfe9b97382a8d3f2027c664b8b8a">snd_pcm_uframes_t</a> val)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Restrict a configuration space to contain only one buffer size. <a href="#ga828cf9e11fe84137c2c8d4938a6fca7f"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#gacc0d26a23389470eae502a3c9f4a2980">snd_pcm_hw_params_set_buffer_size_min</a> (<a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> *pcm, <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params, <a class="el" href="group___p_c_m.html#gab01fcfe9b97382a8d3f2027c664b8b8a">snd_pcm_uframes_t</a> *val)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Restrict a configuration space with a minimum buffer size. <a href="#gacc0d26a23389470eae502a3c9f4a2980"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#gac36099175c6a85db4a1e51053d5708af">snd_pcm_hw_params_set_buffer_size_max</a> (<a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> *pcm, <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params, <a class="el" href="group___p_c_m.html#gab01fcfe9b97382a8d3f2027c664b8b8a">snd_pcm_uframes_t</a> *val)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Restrict a configuration space with a maximum buffer size. <a href="#gac36099175c6a85db4a1e51053d5708af"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#gaec830be678524b0a6a173896bc9d2c67">snd_pcm_hw_params_set_buffer_size_minmax</a> (<a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> *pcm, <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params, <a class="el" href="group___p_c_m.html#gab01fcfe9b97382a8d3f2027c664b8b8a">snd_pcm_uframes_t</a> *min, <a class="el" href="group___p_c_m.html#gab01fcfe9b97382a8d3f2027c664b8b8a">snd_pcm_uframes_t</a> *max)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Restrict a configuration space to have buffer sizes in a given range. <a href="#gaec830be678524b0a6a173896bc9d2c67"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#ga2c00cb635d374030595dbc27b7a983a7">snd_pcm_hw_params_set_buffer_size_near</a> (<a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> *pcm, <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params, <a class="el" href="group___p_c_m.html#gab01fcfe9b97382a8d3f2027c664b8b8a">snd_pcm_uframes_t</a> *val)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Restrict a configuration space to have buffer size nearest to a target. <a href="#ga2c00cb635d374030595dbc27b7a983a7"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#gaca09ba489988fe957fde43cb9dca56a2">snd_pcm_hw_params_set_buffer_size_first</a> (<a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> *pcm, <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params, <a class="el" href="group___p_c_m.html#gab01fcfe9b97382a8d3f2027c664b8b8a">snd_pcm_uframes_t</a> *val)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Restrict a configuration space to contain only its minimum buffer size. <a href="#gaca09ba489988fe957fde43cb9dca56a2"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#gade5604a3fe1de55c76942ee4f4e41219">snd_pcm_hw_params_set_buffer_size_last</a> (<a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> *pcm, <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params, <a class="el" href="group___p_c_m.html#gab01fcfe9b97382a8d3f2027c664b8b8a">snd_pcm_uframes_t</a> *val)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Restrict a configuration space to contain only its maximum buffer size. <a href="#gade5604a3fe1de55c76942ee4f4e41219"></a><br/></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___h_w___params.html#ga254712953cb8abe8b1d8478233863217">snd_pcm_hw_params_get_min_align</a> (const <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params, <a class="el" href="group___p_c_m.html#gab01fcfe9b97382a8d3f2027c664b8b8a">snd_pcm_uframes_t</a> *val)</td></tr>
<tr><td class="mdescLeft"> </td><td class="mdescRight">Get the minimum transfer align value in samples. <a href="#ga254712953cb8abe8b1d8478233863217"></a><br/></td></tr>
</table>
<hr/><a name="_details"></a><h2>Detailed Description</h2>
<p>See the <a class="el" href="pcm.html">PCM (digital audio) interface</a> page for more details. </p>
<hr/><h2>Define Documentation</h2>
<a class="anchor" id="ga06b83cb9a788f99b7b09b570b4355cee"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_alloca" ref="ga06b83cb9a788f99b7b09b570b4355cee" args="(ptr)" -->
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<td class="memname">#define snd_pcm_hw_params_alloca</td>
<td>(</td>
<td class="paramtype">ptr </td>
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<p>allocate an invalid <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> using standard alloca </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>ptr</em> </td><td>returned pointer </td></tr>
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</dd>
</dl>
<dl><dt><b>Examples: </b></dt><dd><a class="el" href="_2test_2latency_8c-example.html#a23">/test/latency.c</a>, and <a class="el" href="_2test_2pcm_8c-example.html#a58">/test/pcm.c</a>.</dd>
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<hr/><h2>Function Documentation</h2>
<a class="anchor" id="ga6e2dd8efbb7a4084bd05e6cc458d84f7"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_any" ref="ga6e2dd8efbb7a4084bd05e6cc458d84f7" args="(snd_pcm_t *pcm, snd_pcm_hw_params_t *params)" -->
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<td class="memname">int snd_pcm_hw_params_any </td>
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<td class="paramtype"><a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> * </td>
<td class="paramname"> <em>pcm</em>, </td>
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<td class="paramtype"><a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em></td><td> </td>
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<p>Fill params with a full configuration space for a PCM. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>pcm</em> </td><td>PCM handle </td></tr>
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
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</dd>
</dl>
<dl><dt><b>Examples: </b></dt><dd><a class="el" href="_2test_2latency_8c-example.html#a4">/test/latency.c</a>, and <a class="el" href="_2test_2pcm_8c-example.html#a15">/test/pcm.c</a>.</dd>
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<a class="anchor" id="ga53b3b351bc5db48da18d5f36b98f79a9"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_can_mmap_sample_resolution" ref="ga53b3b351bc5db48da18d5f36b98f79a9" args="(const snd_pcm_hw_params_t *params)" -->
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<td class="memname">int snd_pcm_hw_params_can_mmap_sample_resolution </td>
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<td class="paramtype">const <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em></td>
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<p>Check, if hardware supports sample-resolution mmap for given configuration. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>Boolean value </dd></dl>
<dl><dt><b>Return values:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>0</em> </td><td>Hardware doesn't support sample-resolution mmap </td></tr>
<tr><td valign="top"></td><td valign="top"><em>1</em> </td><td>Hardware supports sample-resolution mmap</td></tr>
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</dd>
</dl>
<p>The return value is always one when given configuration is not exactly one. Usually, <a class="el" href="group___p_c_m.html#ga1ca0dc120a484965e26cabf966502330" title="Install one PCM hardware configuration chosen from a configuration space and snd_pcm_prepare...">snd_pcm_hw_params()</a> function chooses one configuration from the configuration space. </p>
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<a class="anchor" id="gacb214bcb2af7462195da73b060206800"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_can_overrange" ref="gacb214bcb2af7462195da73b060206800" args="(const snd_pcm_hw_params_t *params)" -->
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<td class="memname">int snd_pcm_hw_params_can_overrange </td>
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<td class="paramtype">const <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
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<p>Check, if hardware supports overrange detection. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>Boolean value </dd></dl>
<dl><dt><b>Return values:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>0</em> </td><td>Hardware doesn't support overrange detection </td></tr>
<tr><td valign="top"></td><td valign="top"><em>1</em> </td><td>Hardware supports overrange detection</td></tr>
</table>
</dd>
</dl>
<p>It is not allowed to call this function when given configuration is not exactly one. Usually, <a class="el" href="group___p_c_m.html#ga1ca0dc120a484965e26cabf966502330" title="Install one PCM hardware configuration chosen from a configuration space and snd_pcm_prepare...">snd_pcm_hw_params()</a> function chooses one configuration from the configuration space. </p>
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<a class="anchor" id="gaad4ba98b2f66baa5360b9a85f064a3e9"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_can_pause" ref="gaad4ba98b2f66baa5360b9a85f064a3e9" args="(const snd_pcm_hw_params_t *params)" -->
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<td class="memname">int snd_pcm_hw_params_can_pause </td>
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<p>Check, if hardware supports pause. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>Boolean value </dd></dl>
<dl><dt><b>Return values:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>0</em> </td><td>Hardware doesn't support pause </td></tr>
<tr><td valign="top"></td><td valign="top"><em>1</em> </td><td>Hardware supports pause</td></tr>
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</dd>
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<p>It is not allowed to call this function when given configuration is not exactly one. Usually, <a class="el" href="group___p_c_m.html#ga1ca0dc120a484965e26cabf966502330" title="Install one PCM hardware configuration chosen from a configuration space and snd_pcm_prepare...">snd_pcm_hw_params()</a> function chooses one configuration from the configuration space. </p>
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<a class="anchor" id="ga6b79539a34e6f51972f4c32b3296585a"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_can_resume" ref="ga6b79539a34e6f51972f4c32b3296585a" args="(const snd_pcm_hw_params_t *params)" -->
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<td class="memname">int snd_pcm_hw_params_can_resume </td>
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<td class="paramtype">const <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
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<p>Check, if hardware supports resume. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>Boolean value </dd></dl>
<dl><dt><b>Return values:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>0</em> </td><td>Hardware doesn't support resume </td></tr>
<tr><td valign="top"></td><td valign="top"><em>1</em> </td><td>Hardware supports resume</td></tr>
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</dd>
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<p>It is not allowed to call this function when given configuration is not exactly one. Usually, <a class="el" href="group___p_c_m.html#ga1ca0dc120a484965e26cabf966502330" title="Install one PCM hardware configuration chosen from a configuration space and snd_pcm_prepare...">snd_pcm_hw_params()</a> function chooses one configuration from the configuration space. </p>
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<a class="anchor" id="gafcea258e7d9b6094350699367f2ef9b5"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_can_sync_start" ref="gafcea258e7d9b6094350699367f2ef9b5" args="(const snd_pcm_hw_params_t *params)" -->
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<td class="memname">int snd_pcm_hw_params_can_sync_start </td>
<td>(</td>
<td class="paramtype">const <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em></td>
<td> ) </td>
<td></td>
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<p>Check, if hardware supports synchronized start with sample resolution. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>Boolean value </dd></dl>
<dl><dt><b>Return values:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>0</em> </td><td>Hardware doesn't support synchronized start </td></tr>
<tr><td valign="top"></td><td valign="top"><em>1</em> </td><td>Hardware supports synchronized start</td></tr>
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<p>It is not allowed to call this function when given configuration is not exactly one. Usually, <a class="el" href="group___p_c_m.html#ga1ca0dc120a484965e26cabf966502330" title="Install one PCM hardware configuration chosen from a configuration space and snd_pcm_prepare...">snd_pcm_hw_params()</a> function chooses one configuration from the configuration space. </p>
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<a class="anchor" id="ga9bcedf4bb4b21527a584846a5986a1f4"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_copy" ref="ga9bcedf4bb4b21527a584846a5986a1f4" args="(snd_pcm_hw_params_t *dst, const snd_pcm_hw_params_t *src)" -->
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<td class="memname">void snd_pcm_hw_params_copy </td>
<td>(</td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>dst</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">const <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>src</em></td><td> </td>
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<p>copy one <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> to another </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>dst</em> </td><td>pointer to destination </td></tr>
<tr><td valign="top"></td><td valign="top"><em>src</em> </td><td>pointer to source </td></tr>
</table>
</dd>
</dl>
<dl><dt><b>Examples: </b></dt><dd><a class="el" href="_2test_2latency_8c-example.html#a13">/test/latency.c</a>.</dd>
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<a class="anchor" id="ga8c094063e7a13be0b9a043be8616a181"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_free" ref="ga8c094063e7a13be0b9a043be8616a181" args="(snd_pcm_hw_params_t *obj)" -->
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<td class="memname">void snd_pcm_hw_params_free </td>
<td>(</td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>obj</em></td>
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<p>frees a previously allocated <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>obj</em> </td><td>pointer to object to free </td></tr>
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</dd>
</dl>
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<a class="anchor" id="ga752e62bb419c7ebe151f8023f5eed1f9"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_get_access" ref="ga752e62bb419c7ebe151f8023f5eed1f9" args="(const snd_pcm_hw_params_t *params, snd_pcm_access_t *_access)" -->
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<td class="memname">int snd_pcm_hw_params_get_access </td>
<td>(</td>
<td class="paramtype">const <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga661221ba5e8f1d6eaf4ab8e2da57cc1a">snd_pcm_access_t</a> * </td>
<td class="paramname"> <em>access</em></td><td> </td>
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<td></td>
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<p>Extract access type from a configuration space. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
<tr><td valign="top"></td><td valign="top"><em>access</em> </td><td>Returned value </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>access type otherwise a negative error code if not exactly one is present </dd></dl>
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<a class="anchor" id="ga20079e218c9307e4e683f0743f3af38c"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_get_access_mask" ref="ga20079e218c9307e4e683f0743f3af38c" args="(snd_pcm_hw_params_t *params, snd_pcm_access_mask_t *mask)" -->
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<td class="memname">int snd_pcm_hw_params_get_access_mask </td>
<td>(</td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga7f9575bcc94c7c2cf5d688a45c16ffba">snd_pcm_access_mask_t</a> * </td>
<td class="paramname"> <em>mask</em></td><td> </td>
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<p>Get access mask from a configuration space. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
<tr><td valign="top"></td><td valign="top"><em>mask</em> </td><td>Returned Access mask </td></tr>
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</dd>
</dl>
</div>
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<a class="anchor" id="gab6556fcaaf926360d2064044a6f6cfb4"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_get_buffer_size" ref="gab6556fcaaf926360d2064044a6f6cfb4" args="(const snd_pcm_hw_params_t *params, snd_pcm_uframes_t *val)" -->
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<td class="memname">int snd_pcm_hw_params_get_buffer_size </td>
<td>(</td>
<td class="paramtype">const <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#gab01fcfe9b97382a8d3f2027c664b8b8a">snd_pcm_uframes_t</a> * </td>
<td class="paramname"> <em>val</em></td><td> </td>
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<td>)</td>
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<p>Extract buffer size from a configuration space. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
<tr><td valign="top"></td><td valign="top"><em>val</em> </td><td>Returned buffer size in frames </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>0 otherwise a negative error code if not exactly one is present </dd></dl>
<dl><dt><b>Examples: </b></dt><dd><a class="el" href="_2test_2latency_8c-example.html#a26">/test/latency.c</a>, and <a class="el" href="_2test_2pcm_8c-example.html#a23">/test/pcm.c</a>.</dd>
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<a class="anchor" id="ga3caf61ab086028067b602d48182df708"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_get_buffer_size_max" ref="ga3caf61ab086028067b602d48182df708" args="(const snd_pcm_hw_params_t *params, snd_pcm_uframes_t *val)" -->
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<td class="memname">int snd_pcm_hw_params_get_buffer_size_max </td>
<td>(</td>
<td class="paramtype">const <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#gab01fcfe9b97382a8d3f2027c664b8b8a">snd_pcm_uframes_t</a> * </td>
<td class="paramname"> <em>val</em></td><td> </td>
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<p>Extract maximum buffer size from a configuration space. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
<tr><td valign="top"></td><td valign="top"><em>val</em> </td><td>Returned approximate maximum buffer size in frames </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>0 otherwise a negative error code</dd></dl>
<p>Exact value is <,=,> the returned one following dir (-1,0,1) </p>
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<a class="anchor" id="ga182adecca0ad204a34b27cdaa9d4f672"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_get_buffer_size_min" ref="ga182adecca0ad204a34b27cdaa9d4f672" args="(const snd_pcm_hw_params_t *params, snd_pcm_uframes_t *val)" -->
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<td class="memname">int snd_pcm_hw_params_get_buffer_size_min </td>
<td>(</td>
<td class="paramtype">const <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#gab01fcfe9b97382a8d3f2027c664b8b8a">snd_pcm_uframes_t</a> * </td>
<td class="paramname"> <em>val</em></td><td> </td>
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<p>Extract minimum buffer size from a configuration space. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
<tr><td valign="top"></td><td valign="top"><em>val</em> </td><td>Returned approximate minimum buffer size in frames </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>0 otherwise a negative error code </dd></dl>
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<a class="anchor" id="gabdea994550dbf7ab176e3c90baa3a30b"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_get_buffer_time" ref="gabdea994550dbf7ab176e3c90baa3a30b" args="(const snd_pcm_hw_params_t *params, unsigned int *val, int *dir)" -->
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<td class="memname">int snd_pcm_hw_params_get_buffer_time </td>
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<td class="paramtype">const <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em>, </td>
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<td></td>
<td class="paramtype">unsigned int * </td>
<td class="paramname"> <em>val</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">int * </td>
<td class="paramname"> <em>dir</em></td><td> </td>
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<p>Extract buffer time from a configuration space. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
<tr><td valign="top"></td><td valign="top"><em>val</em> </td><td>Returned buffer time in us </td></tr>
<tr><td valign="top"></td><td valign="top"><em>dir</em> </td><td>Sub unit direction </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>0 otherwise a negative error code if not exactly one is present</dd></dl>
<p>Actual exact value is <,=,> the approximate one following dir (-1, 0, 1) </p>
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<a class="anchor" id="ga67a33176f4f05231863b37b09527c0e3"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_get_buffer_time_max" ref="ga67a33176f4f05231863b37b09527c0e3" args="(const snd_pcm_hw_params_t *params, unsigned int *val, int *dir)" -->
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<td class="memname">int snd_pcm_hw_params_get_buffer_time_max </td>
<td>(</td>
<td class="paramtype">const <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em>, </td>
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<td></td>
<td class="paramtype">unsigned int * </td>
<td class="paramname"> <em>val</em>, </td>
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<td class="paramtype">int * </td>
<td class="paramname"> <em>dir</em></td><td> </td>
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<p>Extract maximum buffer time from a configuration space. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
<tr><td valign="top"></td><td valign="top"><em>val</em> </td><td>approximate maximum buffer duration in us </td></tr>
<tr><td valign="top"></td><td valign="top"><em>dir</em> </td><td>Sub unit direction </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>0 otherwise a negative error code</dd></dl>
<p>Exact value is <,=,> the returned one following dir (-1,0,1) </p>
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<a class="anchor" id="gaa18c9999c27632f6c47e163b6af17fa9"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_get_buffer_time_min" ref="gaa18c9999c27632f6c47e163b6af17fa9" args="(const snd_pcm_hw_params_t *params, unsigned int *val, int *dir)" -->
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<td class="memname">int snd_pcm_hw_params_get_buffer_time_min </td>
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<td class="paramtype">const <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em>, </td>
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<td></td>
<td class="paramtype">unsigned int * </td>
<td class="paramname"> <em>val</em>, </td>
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<td class="paramtype">int * </td>
<td class="paramname"> <em>dir</em></td><td> </td>
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<p>Extract minimum buffer time from a configuration space. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
<tr><td valign="top"></td><td valign="top"><em>val</em> </td><td>approximate minimum buffer duration in us </td></tr>
<tr><td valign="top"></td><td valign="top"><em>dir</em> </td><td>Sub unit direction </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>0 otherwise a negative error code</dd></dl>
<p>Exact value is <,=,> the returned one following dir (-1,0,1) </p>
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<a class="anchor" id="gae27e04757272070197e00c0dfec5dc97"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_get_channels" ref="gae27e04757272070197e00c0dfec5dc97" args="(const snd_pcm_hw_params_t *params, unsigned int *val)" -->
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<td class="paramtype">const <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em>, </td>
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<p>Extract channels from a configuration space. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
<tr><td valign="top"></td><td valign="top"><em>val</em> </td><td>Returned channels count </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>0 otherwise a negative error code if not exactly one is present </dd></dl>
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<a class="anchor" id="gac6c37a5da7dc8cb19fdd8e9cf1bd673d"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_get_channels_max" ref="gac6c37a5da7dc8cb19fdd8e9cf1bd673d" args="(const snd_pcm_hw_params_t *params, unsigned int *val)" -->
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<td class="memname">int snd_pcm_hw_params_get_channels_max </td>
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<td class="paramtype">const <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em>, </td>
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<td></td>
<td class="paramtype">unsigned int * </td>
<td class="paramname"> <em>val</em></td><td> </td>
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<p>Extract maximum channels count from a configuration space. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
<tr><td valign="top"></td><td valign="top"><em>val</em> </td><td>maximum channels count </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>0 otherwise a negative error code </dd></dl>
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<a class="anchor" id="ga93326349bbb91840a3e0bafef0390cb1"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_get_channels_min" ref="ga93326349bbb91840a3e0bafef0390cb1" args="(const snd_pcm_hw_params_t *params, unsigned int *val)" -->
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<td class="memname">int snd_pcm_hw_params_get_channels_min </td>
<td>(</td>
<td class="paramtype">const <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">unsigned int * </td>
<td class="paramname"> <em>val</em></td><td> </td>
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<td></td>
<td>)</td>
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<p>Extract minimum channels count from a configuration space. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
<tr><td valign="top"></td><td valign="top"><em>val</em> </td><td>minimum channels count </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>0 otherwise a negative error code </dd></dl>
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<a class="anchor" id="gafec078cf053a87339ba91c0f605dca54"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_get_export_buffer" ref="gafec078cf053a87339ba91c0f605dca54" args="(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val)" -->
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<td class="memname">int snd_pcm_hw_params_get_export_buffer </td>
<td>(</td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> * </td>
<td class="paramname"> <em>pcm</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em>, </td>
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<td></td>
<td class="paramtype">unsigned int * </td>
<td class="paramname"> <em>val</em></td><td> </td>
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<td></td>
<td>)</td>
<td></td><td></td><td></td>
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<p>Extract buffer accessibility from a configuration space. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>pcm</em> </td><td>PCM handle </td></tr>
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
<tr><td valign="top"></td><td valign="top"><em>val</em> </td><td>0 = disable, 1 = enable exporting buffer </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>0 otherwise a negative error code </dd></dl>
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<a class="anchor" id="ga12fe3e1ca110fd61cff685890366c743"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_get_fifo_size" ref="ga12fe3e1ca110fd61cff685890366c743" args="(const snd_pcm_hw_params_t *params)" -->
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<td class="memname">int snd_pcm_hw_params_get_fifo_size </td>
<td>(</td>
<td class="paramtype">const <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em></td>
<td> ) </td>
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<p>Get hard are FIFO size info from a configuration space. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>FIFO size in frames otherwise a negative error code if the info is not available</dd></dl>
<p>It is not allowed to call this function when given configuration is not exactly one. Usually, <a class="el" href="group___p_c_m.html#ga1ca0dc120a484965e26cabf966502330" title="Install one PCM hardware configuration chosen from a configuration space and snd_pcm_prepare...">snd_pcm_hw_params()</a> function chooses one configuration from the configuration space. </p>
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<a class="anchor" id="ga66b28dd4f26d603e923a3577d1a2e98f"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_get_format" ref="ga66b28dd4f26d603e923a3577d1a2e98f" args="(const snd_pcm_hw_params_t *params, snd_pcm_format_t *val)" -->
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<td class="memname">int snd_pcm_hw_params_get_format </td>
<td>(</td>
<td class="paramtype">const <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#gaa14b7f26877a812acbb39811364177f8">snd_pcm_format_t</a> * </td>
<td class="paramname"> <em>format</em></td><td> </td>
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<td></td><td></td><td></td>
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<p>Extract format from a configuration space. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
<tr><td valign="top"></td><td valign="top"><em>format</em> </td><td>returned format </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>format otherwise a negative error code if not exactly one is present </dd></dl>
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<a class="anchor" id="ga43bdf7596f8722fb6b8edbeaf1aebd90"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_get_format_mask" ref="ga43bdf7596f8722fb6b8edbeaf1aebd90" args="(snd_pcm_hw_params_t *params, snd_pcm_format_mask_t *mask)" -->
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<td class="memname">void snd_pcm_hw_params_get_format_mask </td>
<td>(</td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga0936aa9ac0051a3611583a2740915545">snd_pcm_format_mask_t</a> * </td>
<td class="paramname"> <em>mask</em></td><td> </td>
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<td>)</td>
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<p>Get format mask from a configuration space. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
<tr><td valign="top"></td><td valign="top"><em>mask</em> </td><td>Returned Format mask </td></tr>
</table>
</dd>
</dl>
</div>
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<a class="anchor" id="ga254712953cb8abe8b1d8478233863217"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_get_min_align" ref="ga254712953cb8abe8b1d8478233863217" args="(const snd_pcm_hw_params_t *params, snd_pcm_uframes_t *val)" -->
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<td class="memname">int snd_pcm_hw_params_get_min_align </td>
<td>(</td>
<td class="paramtype">const <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#gab01fcfe9b97382a8d3f2027c664b8b8a">snd_pcm_uframes_t</a> * </td>
<td class="paramname"> <em>val</em></td><td> </td>
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<td></td>
<td>)</td>
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<p>Get the minimum transfer align value in samples. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
<tr><td valign="top"></td><td valign="top"><em>val</em> </td><td>Returned minimum align value </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>0 otherwise a negative error code if not exactly one is present </dd></dl>
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<a class="anchor" id="gaba48ea189171536f9793e0d99e6db5e0"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_get_period_size" ref="gaba48ea189171536f9793e0d99e6db5e0" args="(const snd_pcm_hw_params_t *params, snd_pcm_uframes_t *frames, int *dir)" -->
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<td class="memname">int snd_pcm_hw_params_get_period_size </td>
<td>(</td>
<td class="paramtype">const <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#gab01fcfe9b97382a8d3f2027c664b8b8a">snd_pcm_uframes_t</a> * </td>
<td class="paramname"> <em>val</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">int * </td>
<td class="paramname"> <em>dir</em></td><td> </td>
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<td></td>
<td>)</td>
<td></td><td></td><td></td>
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<p>Extract period size from a configuration space. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
<tr><td valign="top"></td><td valign="top"><em>val</em> </td><td>Returned approximate period size in frames </td></tr>
<tr><td valign="top"></td><td valign="top"><em>dir</em> </td><td>Sub unit direction </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>0 otherwise a negative error code if not exactly one is present</dd></dl>
<p>Actual exact value is <,=,> the approximate one following dir (-1, 0, 1) </p>
<dl><dt><b>Examples: </b></dt><dd><a class="el" href="_2test_2latency_8c-example.html#a20">/test/latency.c</a>, and <a class="el" href="_2test_2pcm_8c-example.html#a25">/test/pcm.c</a>.</dd>
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<a class="anchor" id="gab5c16621ae697e5ee6f442ec7b7062c5"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_get_period_size_max" ref="gab5c16621ae697e5ee6f442ec7b7062c5" args="(const snd_pcm_hw_params_t *params, snd_pcm_uframes_t *frames, int *dir)" -->
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<td class="memname">int snd_pcm_hw_params_get_period_size_max </td>
<td>(</td>
<td class="paramtype">const <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#gab01fcfe9b97382a8d3f2027c664b8b8a">snd_pcm_uframes_t</a> * </td>
<td class="paramname"> <em>val</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">int * </td>
<td class="paramname"> <em>dir</em></td><td> </td>
</tr>
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<td></td>
<td>)</td>
<td></td><td></td><td></td>
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<p>Extract maximum period size from a configuration space. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
<tr><td valign="top"></td><td valign="top"><em>val</em> </td><td>approximate minimum period size in frames </td></tr>
<tr><td valign="top"></td><td valign="top"><em>dir</em> </td><td>Sub unit direction </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>0 otherwise a negative error code</dd></dl>
<p>Exact value is <,=,> the returned one following dir (-1,0,1) </p>
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<a class="anchor" id="ga3f6fe37605b54d0a25e8bf1d10f71ae4"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_get_period_size_min" ref="ga3f6fe37605b54d0a25e8bf1d10f71ae4" args="(const snd_pcm_hw_params_t *params, snd_pcm_uframes_t *frames, int *dir)" -->
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<td class="memname">int snd_pcm_hw_params_get_period_size_min </td>
<td>(</td>
<td class="paramtype">const <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#gab01fcfe9b97382a8d3f2027c664b8b8a">snd_pcm_uframes_t</a> * </td>
<td class="paramname"> <em>val</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">int * </td>
<td class="paramname"> <em>dir</em></td><td> </td>
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<td></td>
<td>)</td>
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<p>Extract minimum period size from a configuration space. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
<tr><td valign="top"></td><td valign="top"><em>val</em> </td><td>approximate minimum period size in frames </td></tr>
<tr><td valign="top"></td><td valign="top"><em>dir</em> </td><td>Sub unit direction </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>0 otherwise a negative error code</dd></dl>
<p>Exact value is <,=,> the returned one following dir (-1,0,1) </p>
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<a class="anchor" id="ga71f5d43bf63dc7292b8b58f17acccf89"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_get_period_time" ref="ga71f5d43bf63dc7292b8b58f17acccf89" args="(const snd_pcm_hw_params_t *params, unsigned int *val, int *dir)" -->
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<td class="memname">int snd_pcm_hw_params_get_period_time </td>
<td>(</td>
<td class="paramtype">const <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em>, </td>
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<td></td>
<td class="paramtype">unsigned int * </td>
<td class="paramname"> <em>val</em>, </td>
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<td></td>
<td class="paramtype">int * </td>
<td class="paramname"> <em>dir</em></td><td> </td>
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<p>Extract period time from a configuration space. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
<tr><td valign="top"></td><td valign="top"><em>val</em> </td><td>Returned approximate period duration in us </td></tr>
<tr><td valign="top"></td><td valign="top"><em>dir</em> </td><td>Sub unit direction </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>0 otherwise a negative error code if not exactly one is present</dd></dl>
<p>Actual exact value is <,=,> the approximate one following dir (-1, 0, 1) </p>
<dl><dt><b>Examples: </b></dt><dd><a class="el" href="_2test_2latency_8c-example.html#a25">/test/latency.c</a>.</dd>
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<a class="anchor" id="ga74b510f4958e90a83a631a1eeedf13e0"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_get_period_time_max" ref="ga74b510f4958e90a83a631a1eeedf13e0" args="(const snd_pcm_hw_params_t *params, unsigned int *val, int *dir)" -->
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<td class="memname">int snd_pcm_hw_params_get_period_time_max </td>
<td>(</td>
<td class="paramtype">const <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em>, </td>
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<td></td>
<td class="paramtype">unsigned int * </td>
<td class="paramname"> <em>val</em>, </td>
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<td></td>
<td class="paramtype">int * </td>
<td class="paramname"> <em>dir</em></td><td> </td>
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<p>Extract maximum period time from a configuration space. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
<tr><td valign="top"></td><td valign="top"><em>val</em> </td><td>approximate maximum period duration in us </td></tr>
<tr><td valign="top"></td><td valign="top"><em>dir</em> </td><td>Sub unit direction </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>0 otherwise a negative error code</dd></dl>
<p>Exact value is <,=,> the returned one following dir (-1,0,1) </p>
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<a class="anchor" id="gae68d4b168ef5d40f644a1a4ed854689f"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_get_period_time_min" ref="gae68d4b168ef5d40f644a1a4ed854689f" args="(const snd_pcm_hw_params_t *params, unsigned int *val, int *dir)" -->
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<td class="memname">int snd_pcm_hw_params_get_period_time_min </td>
<td>(</td>
<td class="paramtype">const <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em>, </td>
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<td></td>
<td class="paramtype">unsigned int * </td>
<td class="paramname"> <em>val</em>, </td>
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<td></td>
<td class="paramtype">int * </td>
<td class="paramname"> <em>dir</em></td><td> </td>
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<p>Extract minimum period time from a configuration space. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
<tr><td valign="top"></td><td valign="top"><em>val</em> </td><td>approximate minimum period duration in us </td></tr>
<tr><td valign="top"></td><td valign="top"><em>dir</em> </td><td>Sub unit direction </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>0 otherwise a negative error code</dd></dl>
<p>Exact value is <,=,> the returned one following dir (-1,0,1) </p>
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<a class="anchor" id="ga7242d7045ae23a9ae736c191030c25e8"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_get_periods" ref="ga7242d7045ae23a9ae736c191030c25e8" args="(const snd_pcm_hw_params_t *params, unsigned int *val, int *dir)" -->
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<td class="memname">int snd_pcm_hw_params_get_periods </td>
<td>(</td>
<td class="paramtype">const <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em>, </td>
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<td></td>
<td class="paramtype">unsigned int * </td>
<td class="paramname"> <em>val</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">int * </td>
<td class="paramname"> <em>dir</em></td><td> </td>
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<td>)</td>
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<p>Extract periods from a configuration space. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
<tr><td valign="top"></td><td valign="top"><em>val</em> </td><td>approximate periods per buffer </td></tr>
<tr><td valign="top"></td><td valign="top"><em>dir</em> </td><td>Sub unit direction </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>0 otherwise a negative error code if not exactly one is present</dd></dl>
<p>Actual exact value is <,=,> the approximate one following dir (-1, 0, 1) </p>
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<a class="anchor" id="ga60417687267cd6ddc56a9c15179fe275"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_get_periods_max" ref="ga60417687267cd6ddc56a9c15179fe275" args="(const snd_pcm_hw_params_t *params, unsigned int *val, int *dir)" -->
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<td class="memname">int snd_pcm_hw_params_get_periods_max </td>
<td>(</td>
<td class="paramtype">const <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">unsigned int * </td>
<td class="paramname"> <em>val</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">int * </td>
<td class="paramname"> <em>dir</em></td><td> </td>
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<td></td>
<td>)</td>
<td></td><td></td><td></td>
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<div class="memdoc">
<p>Extract maximum periods count from a configuration space. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
<tr><td valign="top"></td><td valign="top"><em>val</em> </td><td>approximate maximum periods per buffer </td></tr>
<tr><td valign="top"></td><td valign="top"><em>dir</em> </td><td>Sub unit direction </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>0 otherwise a negative error code</dd></dl>
<p>Exact value is <,=,> the returned one following dir (-1,0,1) </p>
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<a class="anchor" id="ga17f3826360b0fe1f47c696388d25ac93"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_get_periods_min" ref="ga17f3826360b0fe1f47c696388d25ac93" args="(const snd_pcm_hw_params_t *params, unsigned int *val, int *dir)" -->
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<td class="memname">int snd_pcm_hw_params_get_periods_min </td>
<td>(</td>
<td class="paramtype">const <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">unsigned int * </td>
<td class="paramname"> <em>val</em>, </td>
</tr>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">int * </td>
<td class="paramname"> <em>dir</em></td><td> </td>
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<td></td>
<td>)</td>
<td></td><td></td><td></td>
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<div class="memdoc">
<p>Extract minimum periods count from a configuration space. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
<tr><td valign="top"></td><td valign="top"><em>val</em> </td><td>approximate minimum periods per buffer </td></tr>
<tr><td valign="top"></td><td valign="top"><em>dir</em> </td><td>Sub unit direction </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>0 otherwise a negative error code</dd></dl>
<p>Exact value is <,=,> the returned one following dir (-1,0,1) </p>
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<a class="anchor" id="ga4279c4b45a15f7e282e436e75d6ba13a"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_get_rate" ref="ga4279c4b45a15f7e282e436e75d6ba13a" args="(const snd_pcm_hw_params_t *params, unsigned int *val, int *dir)" -->
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<td class="memname">int snd_pcm_hw_params_get_rate </td>
<td>(</td>
<td class="paramtype">const <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">unsigned int * </td>
<td class="paramname"> <em>val</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">int * </td>
<td class="paramname"> <em>dir</em></td><td> </td>
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<td></td>
<td>)</td>
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<p>Extract rate from a configuration space. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
<tr><td valign="top"></td><td valign="top"><em>val</em> </td><td>Returned approximate rate </td></tr>
<tr><td valign="top"></td><td valign="top"><em>dir</em> </td><td>Sub unit direction </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>0 otherwise a negative error code if not exactly one is present</dd></dl>
<p>Actual exact value is <,=,> the approximate one following dir (-1, 0, 1) </p>
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<a class="anchor" id="ga6770c2b988c8dc91eb51893cc145aa2c"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_get_rate_max" ref="ga6770c2b988c8dc91eb51893cc145aa2c" args="(const snd_pcm_hw_params_t *params, unsigned int *val, int *dir)" -->
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<td class="memname">int snd_pcm_hw_params_get_rate_max </td>
<td>(</td>
<td class="paramtype">const <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">unsigned int * </td>
<td class="paramname"> <em>val</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">int * </td>
<td class="paramname"> <em>dir</em></td><td> </td>
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<td></td>
<td>)</td>
<td></td><td></td><td></td>
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<div class="memdoc">
<p>Extract maximum rate from a configuration space. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
<tr><td valign="top"></td><td valign="top"><em>val</em> </td><td>Returned approximate maximum rate </td></tr>
<tr><td valign="top"></td><td valign="top"><em>dir</em> </td><td>Sub unit direction </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>0 otherwise a negative error code</dd></dl>
<p>Exact value is <,=,> the returned one following dir (-1,0,1) </p>
</div>
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<a class="anchor" id="gaf7801fdf88fa51ca96fe97d3211db3f7"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_get_rate_min" ref="gaf7801fdf88fa51ca96fe97d3211db3f7" args="(const snd_pcm_hw_params_t *params, unsigned int *val, int *dir)" -->
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<td class="memname">int snd_pcm_hw_params_get_rate_min </td>
<td>(</td>
<td class="paramtype">const <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em>, </td>
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<td></td>
<td class="paramtype">unsigned int * </td>
<td class="paramname"> <em>val</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">int * </td>
<td class="paramname"> <em>dir</em></td><td> </td>
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<td></td>
<td>)</td>
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<p>Extract minimum rate from a configuration space. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
<tr><td valign="top"></td><td valign="top"><em>val</em> </td><td>Returned approximate minimum rate </td></tr>
<tr><td valign="top"></td><td valign="top"><em>dir</em> </td><td>Sub unit direction </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>0 otherwise a negative error code</dd></dl>
<p>Exact value is <,=,> the returned one following dir (-1,0,1) </p>
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<a class="anchor" id="ga556ddf9731e184cb635994f739a6efe3"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_get_rate_numden" ref="ga556ddf9731e184cb635994f739a6efe3" args="(const snd_pcm_hw_params_t *params, unsigned int *rate_num, unsigned int *rate_den)" -->
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<td class="memname">int snd_pcm_hw_params_get_rate_numden </td>
<td>(</td>
<td class="paramtype">const <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em>, </td>
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<td></td>
<td class="paramtype">unsigned int * </td>
<td class="paramname"> <em>rate_num</em>, </td>
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<td></td>
<td class="paramtype">unsigned int * </td>
<td class="paramname"> <em>rate_den</em></td><td> </td>
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<p>Get rate exact info from a configuration space. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
<tr><td valign="top"></td><td valign="top"><em>rate_num</em> </td><td>Pointer to returned rate numerator </td></tr>
<tr><td valign="top"></td><td valign="top"><em>rate_den</em> </td><td>Pointer to returned rate denominator </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>0 otherwise a negative error code if the info is not available</dd></dl>
<p>It is not allowed to call this function when given configuration is not exactly one. Usually, <a class="el" href="group___p_c_m.html#ga1ca0dc120a484965e26cabf966502330" title="Install one PCM hardware configuration chosen from a configuration space and snd_pcm_prepare...">snd_pcm_hw_params()</a> function chooses one configuration from the configuration space. </p>
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<a class="anchor" id="gacaa53b05cd5e4f55eeb4d5ea64129c21"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_get_rate_resample" ref="gacaa53b05cd5e4f55eeb4d5ea64129c21" args="(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val)" -->
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<td class="memname">int snd_pcm_hw_params_get_rate_resample </td>
<td>(</td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> * </td>
<td class="paramname"> <em>pcm</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em>, </td>
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<td></td>
<td class="paramtype">unsigned int * </td>
<td class="paramname"> <em>val</em></td><td> </td>
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<td></td>
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<p>Extract resample state from a configuration space. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>pcm</em> </td><td>PCM handle </td></tr>
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
<tr><td valign="top"></td><td valign="top"><em>val</em> </td><td>0 = disable, 1 = enable rate resampling </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>0 otherwise a negative error code </dd></dl>
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<a class="anchor" id="ga8bb1180b62a4225f0e094b95ac5d3674"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_get_sbits" ref="ga8bb1180b62a4225f0e094b95ac5d3674" args="(const snd_pcm_hw_params_t *params)" -->
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<td class="memname">int snd_pcm_hw_params_get_sbits </td>
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<td class="paramtype">const <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em></td>
<td> ) </td>
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<p>Get sample resolution info from a configuration space. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>signification bits in sample otherwise a negative error code if the info is not available</dd></dl>
<p>It is not allowed to call this function when given configuration is not exactly one. Usually, <a class="el" href="group___p_c_m.html#ga1ca0dc120a484965e26cabf966502330" title="Install one PCM hardware configuration chosen from a configuration space and snd_pcm_prepare...">snd_pcm_hw_params()</a> function chooses one configuration from the configuration space. </p>
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<a class="anchor" id="ga77a934515c24e17cfb0af21a8b2e0690"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_get_subformat" ref="ga77a934515c24e17cfb0af21a8b2e0690" args="(const snd_pcm_hw_params_t *params, snd_pcm_subformat_t *subformat)" -->
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<td class="memname">int snd_pcm_hw_params_get_subformat </td>
<td>(</td>
<td class="paramtype">const <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga1e5fe73a6bdf881e2f91921d5e5327c7">snd_pcm_subformat_t</a> * </td>
<td class="paramname"> <em>subformat</em></td><td> </td>
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<p>Extract subformat from a configuration space. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
<tr><td valign="top"></td><td valign="top"><em>subformat</em> </td><td>Returned subformat value </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>subformat otherwise a negative error code if not exactly one is present </dd></dl>
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<a class="anchor" id="gaafee81722f5bcba41e16e4c7a77059c2"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_get_subformat_mask" ref="gaafee81722f5bcba41e16e4c7a77059c2" args="(snd_pcm_hw_params_t *params, snd_pcm_subformat_mask_t *mask)" -->
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<td class="memname">void snd_pcm_hw_params_get_subformat_mask </td>
<td>(</td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga891b054202089747199bc3348b9d9630">snd_pcm_subformat_mask_t</a> * </td>
<td class="paramname"> <em>mask</em></td><td> </td>
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<p>Get subformat mask from a configuration space. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
<tr><td valign="top"></td><td valign="top"><em>mask</em> </td><td>Returned Subformat mask </td></tr>
</table>
</dd>
</dl>
</div>
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<a class="anchor" id="ga366395c87f811d8ab8df83dc8a8a8124"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_is_batch" ref="ga366395c87f811d8ab8df83dc8a8a8124" args="(const snd_pcm_hw_params_t *params)" -->
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<td class="memname">int snd_pcm_hw_params_is_batch </td>
<td>(</td>
<td class="paramtype">const <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em></td>
<td> ) </td>
<td></td>
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<p>Check, if hardware does double buffering for data transfers for given configuration. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>Boolean value </dd></dl>
<dl><dt><b>Return values:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>0</em> </td><td>Hardware doesn't do double buffering for data transfers </td></tr>
<tr><td valign="top"></td><td valign="top"><em>1</em> </td><td>Hardware does double buffering for data transfers</td></tr>
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</dd>
</dl>
<p>It is not allowed to call this function when given configuration is not exactly one. Usually, <a class="el" href="group___p_c_m.html#ga1ca0dc120a484965e26cabf966502330" title="Install one PCM hardware configuration chosen from a configuration space and snd_pcm_prepare...">snd_pcm_hw_params()</a> function chooses one configuration from the configuration space. </p>
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<a class="anchor" id="gac511eb0d4db6f1e8303161486061fe14"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_is_block_transfer" ref="gac511eb0d4db6f1e8303161486061fe14" args="(const snd_pcm_hw_params_t *params)" -->
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<td class="memname">int snd_pcm_hw_params_is_block_transfer </td>
<td>(</td>
<td class="paramtype">const <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em></td>
<td> ) </td>
<td></td>
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<div class="memdoc">
<p>Check, if hardware does block transfers for samples for given configuration. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>Boolean value </dd></dl>
<dl><dt><b>Return values:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>0</em> </td><td>Hardware doesn't block transfers </td></tr>
<tr><td valign="top"></td><td valign="top"><em>1</em> </td><td>Hardware does block transfers</td></tr>
</table>
</dd>
</dl>
<p>It is not allowed to call this function when given configuration is not exactly one. Usually, <a class="el" href="group___p_c_m.html#ga1ca0dc120a484965e26cabf966502330" title="Install one PCM hardware configuration chosen from a configuration space and snd_pcm_prepare...">snd_pcm_hw_params()</a> function chooses one configuration from the configuration space. </p>
</div>
</div>
<a class="anchor" id="ga3bfe71142e72dffb274f8ba9ef7edeee"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_is_double" ref="ga3bfe71142e72dffb274f8ba9ef7edeee" args="(const snd_pcm_hw_params_t *params)" -->
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<td class="memname">int snd_pcm_hw_params_is_double </td>
<td>(</td>
<td class="paramtype">const <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em></td>
<td> ) </td>
<td></td>
</tr>
</table>
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<div class="memdoc">
<p>Check, if hardware does double buffering for start/stop for given configuration. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>Boolean value </dd></dl>
<dl><dt><b>Return values:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>0</em> </td><td>Hardware doesn't do double buffering for start/stop </td></tr>
<tr><td valign="top"></td><td valign="top"><em>1</em> </td><td>Hardware does double buffering for start/stop</td></tr>
</table>
</dd>
</dl>
<p>It is not allowed to call this function when given configuration is not exactly one. Usually, <a class="el" href="group___p_c_m.html#ga1ca0dc120a484965e26cabf966502330" title="Install one PCM hardware configuration chosen from a configuration space and snd_pcm_prepare...">snd_pcm_hw_params()</a> function chooses one configuration from the configuration space. </p>
</div>
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<a class="anchor" id="gabaf7b36cfb700973fe8d89971f0f967b"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_is_half_duplex" ref="gabaf7b36cfb700973fe8d89971f0f967b" args="(const snd_pcm_hw_params_t *params)" -->
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<td class="memname">int snd_pcm_hw_params_is_half_duplex </td>
<td>(</td>
<td class="paramtype">const <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em></td>
<td> ) </td>
<td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Check, if hardware does half-duplex only. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>Boolean value </dd></dl>
<dl><dt><b>Return values:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>0</em> </td><td>Hardware doesn't do half-duplex </td></tr>
<tr><td valign="top"></td><td valign="top"><em>1</em> </td><td>Hardware does half-duplex</td></tr>
</table>
</dd>
</dl>
<p>It is not allowed to call this function when given configuration is not exactly one. Usually, <a class="el" href="group___p_c_m.html#ga1ca0dc120a484965e26cabf966502330" title="Install one PCM hardware configuration chosen from a configuration space and snd_pcm_prepare...">snd_pcm_hw_params()</a> function chooses one configuration from the configuration space. </p>
</div>
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<a class="anchor" id="gae8768da025e34e3c3c6b5a5dfdcd2ad4"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_is_joint_duplex" ref="gae8768da025e34e3c3c6b5a5dfdcd2ad4" args="(const snd_pcm_hw_params_t *params)" -->
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<td class="memname">int snd_pcm_hw_params_is_joint_duplex </td>
<td>(</td>
<td class="paramtype">const <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em></td>
<td> ) </td>
<td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Check, if hardware does joint-duplex (playback and capture are somewhat correlated). </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>Boolean value </dd></dl>
<dl><dt><b>Return values:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>0</em> </td><td>Hardware doesn't do joint-duplex </td></tr>
<tr><td valign="top"></td><td valign="top"><em>1</em> </td><td>Hardware does joint-duplex</td></tr>
</table>
</dd>
</dl>
<p>It is not allowed to call this function when given configuration is not exactly one. Usually, <a class="el" href="group___p_c_m.html#ga1ca0dc120a484965e26cabf966502330" title="Install one PCM hardware configuration chosen from a configuration space and snd_pcm_prepare...">snd_pcm_hw_params()</a> function chooses one configuration from the configuration space. </p>
</div>
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<a class="anchor" id="ga7a129f7671fee8c0ced42d64a6c2379d"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_is_monotonic" ref="ga7a129f7671fee8c0ced42d64a6c2379d" args="(const snd_pcm_hw_params_t *params)" -->
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<td class="memname">int snd_pcm_hw_params_is_monotonic </td>
<td>(</td>
<td class="paramtype">const <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em></td>
<td> ) </td>
<td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Check, if timestamps are monotonic for given configuration. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>Boolean value </dd></dl>
<dl><dt><b>Return values:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>0</em> </td><td>Device doesn't do monotomic timestamps </td></tr>
<tr><td valign="top"></td><td valign="top"><em>1</em> </td><td>Device does monotonic timestamps</td></tr>
</table>
</dd>
</dl>
<p>It is not allowed to call this function when given configuration is not exactly one. Usually, <a class="el" href="group___p_c_m.html#ga1ca0dc120a484965e26cabf966502330" title="Install one PCM hardware configuration chosen from a configuration space and snd_pcm_prepare...">snd_pcm_hw_params()</a> function chooses one configuration from the configuration space. </p>
</div>
</div>
<a class="anchor" id="ga6e53d09a9c7cc3f2a692c0af99886237"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_malloc" ref="ga6e53d09a9c7cc3f2a692c0af99886237" args="(snd_pcm_hw_params_t **ptr)" -->
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<td class="memname">int snd_pcm_hw_params_malloc </td>
<td>(</td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> ** </td>
<td class="paramname"> <em>ptr</em></td>
<td> ) </td>
<td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>allocate an invalid <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> using standard malloc </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>ptr</em> </td><td>returned pointer </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>0 on success otherwise negative error code </dd></dl>
</div>
</div>
<a class="anchor" id="ga4c8f1c632931923531ca68ee048a8de8"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_set_access" ref="ga4c8f1c632931923531ca68ee048a8de8" args="(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_access_t _access)" -->
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<td class="memname">int snd_pcm_hw_params_set_access </td>
<td>(</td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> * </td>
<td class="paramname"> <em>pcm</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga661221ba5e8f1d6eaf4ab8e2da57cc1a">snd_pcm_access_t</a> </td>
<td class="paramname"> <em>access</em></td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td></td>
</tr>
</table>
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<div class="memdoc">
<p>Restrict a configuration space to contain only one access type. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>pcm</em> </td><td>PCM handle </td></tr>
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
<tr><td valign="top"></td><td valign="top"><em>access</em> </td><td>access type </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>0 otherwise a negative error code if configuration space would become empty </dd></dl>
<dl><dt><b>Examples: </b></dt><dd><a class="el" href="_2test_2latency_8c-example.html#a7">/test/latency.c</a>, and <a class="el" href="_2test_2pcm_8c-example.html#a18">/test/pcm.c</a>.</dd>
</dl>
</div>
</div>
<a class="anchor" id="ga2fd545bdf469d54cff6a038e31ce56ce"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_set_access_first" ref="ga2fd545bdf469d54cff6a038e31ce56ce" args="(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_access_t *_access)" -->
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<td class="memname">int snd_pcm_hw_params_set_access_first </td>
<td>(</td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> * </td>
<td class="paramname"> <em>pcm</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga661221ba5e8f1d6eaf4ab8e2da57cc1a">snd_pcm_access_t</a> * </td>
<td class="paramname"> <em>access</em></td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td></td>
</tr>
</table>
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<p>Restrict a configuration space to contain only its first access type. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>pcm</em> </td><td>PCM handle </td></tr>
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
<tr><td valign="top"></td><td valign="top"><em>access</em> </td><td>Returned first access type </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>0 otherwise a negative error code </dd></dl>
</div>
</div>
<a class="anchor" id="ga172b949e37f28da5a102e56b04f69be3"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_set_access_last" ref="ga172b949e37f28da5a102e56b04f69be3" args="(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_access_t *_access)" -->
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<td class="memname">int snd_pcm_hw_params_set_access_last </td>
<td>(</td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> * </td>
<td class="paramname"> <em>pcm</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga661221ba5e8f1d6eaf4ab8e2da57cc1a">snd_pcm_access_t</a> * </td>
<td class="paramname"> <em>access</em></td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td></td>
</tr>
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<p>Restrict a configuration space to contain only its last access type. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>pcm</em> </td><td>PCM handle </td></tr>
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
<tr><td valign="top"></td><td valign="top"><em>access</em> </td><td>Returned last access type </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>0 otherwise a negative error code </dd></dl>
</div>
</div>
<a class="anchor" id="gad54808a277db646cbc21be07efc31000"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_set_access_mask" ref="gad54808a277db646cbc21be07efc31000" args="(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_access_mask_t *mask)" -->
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<td class="memname">int snd_pcm_hw_params_set_access_mask </td>
<td>(</td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> * </td>
<td class="paramname"> <em>pcm</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga7f9575bcc94c7c2cf5d688a45c16ffba">snd_pcm_access_mask_t</a> * </td>
<td class="paramname"> <em>mask</em></td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td></td>
</tr>
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<p>Restrict a configuration space to contain only a set of access types. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>pcm</em> </td><td>PCM handle </td></tr>
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
<tr><td valign="top"></td><td valign="top"><em>mask</em> </td><td>Access mask </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>0 otherwise a negative error code </dd></dl>
</div>
</div>
<a class="anchor" id="ga828cf9e11fe84137c2c8d4938a6fca7f"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_set_buffer_size" ref="ga828cf9e11fe84137c2c8d4938a6fca7f" args="(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_uframes_t val)" -->
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<td class="memname">int snd_pcm_hw_params_set_buffer_size </td>
<td>(</td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> * </td>
<td class="paramname"> <em>pcm</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#gab01fcfe9b97382a8d3f2027c664b8b8a">snd_pcm_uframes_t</a> </td>
<td class="paramname"> <em>val</em></td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td></td>
</tr>
</table>
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<p>Restrict a configuration space to contain only one buffer size. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>pcm</em> </td><td>PCM handle </td></tr>
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
<tr><td valign="top"></td><td valign="top"><em>val</em> </td><td>buffer size in frames </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>0 otherwise a negative error code if configuration space would become empty</dd></dl>
<p>Wanted exact value is <,=,> val following dir (-1,0,1) </p>
</div>
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<a class="anchor" id="gaca09ba489988fe957fde43cb9dca56a2"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_set_buffer_size_first" ref="gaca09ba489988fe957fde43cb9dca56a2" args="(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_uframes_t *val)" -->
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<td class="memname">int snd_pcm_hw_params_set_buffer_size_first </td>
<td>(</td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> * </td>
<td class="paramname"> <em>pcm</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#gab01fcfe9b97382a8d3f2027c664b8b8a">snd_pcm_uframes_t</a> * </td>
<td class="paramname"> <em>val</em></td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Restrict a configuration space to contain only its minimum buffer size. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>pcm</em> </td><td>PCM handle </td></tr>
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
<tr><td valign="top"></td><td valign="top"><em>val</em> </td><td>Returned minimum buffer size in frames </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>buffer size in frames </dd></dl>
</div>
</div>
<a class="anchor" id="gade5604a3fe1de55c76942ee4f4e41219"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_set_buffer_size_last" ref="gade5604a3fe1de55c76942ee4f4e41219" args="(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_uframes_t *val)" -->
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">int snd_pcm_hw_params_set_buffer_size_last </td>
<td>(</td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> * </td>
<td class="paramname"> <em>pcm</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#gab01fcfe9b97382a8d3f2027c664b8b8a">snd_pcm_uframes_t</a> * </td>
<td class="paramname"> <em>val</em></td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Restrict a configuration space to contain only its maximum buffer size. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>pcm</em> </td><td>PCM handle </td></tr>
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
<tr><td valign="top"></td><td valign="top"><em>val</em> </td><td>Returned maximum buffer size in frames </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>0 otherwise a negative error code </dd></dl>
</div>
</div>
<a class="anchor" id="gac36099175c6a85db4a1e51053d5708af"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_set_buffer_size_max" ref="gac36099175c6a85db4a1e51053d5708af" args="(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_uframes_t *val)" -->
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">int snd_pcm_hw_params_set_buffer_size_max </td>
<td>(</td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> * </td>
<td class="paramname"> <em>pcm</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#gab01fcfe9b97382a8d3f2027c664b8b8a">snd_pcm_uframes_t</a> * </td>
<td class="paramname"> <em>val</em></td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Restrict a configuration space with a maximum buffer size. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>pcm</em> </td><td>PCM handle </td></tr>
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
<tr><td valign="top"></td><td valign="top"><em>val</em> </td><td>approximate maximum buffer size in frames (on return filled with actual maximum) </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>0 otherwise a negative error code if configuration space would become empty </dd></dl>
</div>
</div>
<a class="anchor" id="gacc0d26a23389470eae502a3c9f4a2980"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_set_buffer_size_min" ref="gacc0d26a23389470eae502a3c9f4a2980" args="(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_uframes_t *val)" -->
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">int snd_pcm_hw_params_set_buffer_size_min </td>
<td>(</td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> * </td>
<td class="paramname"> <em>pcm</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#gab01fcfe9b97382a8d3f2027c664b8b8a">snd_pcm_uframes_t</a> * </td>
<td class="paramname"> <em>val</em></td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Restrict a configuration space with a minimum buffer size. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>pcm</em> </td><td>PCM handle </td></tr>
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
<tr><td valign="top"></td><td valign="top"><em>val</em> </td><td>approximate minimum buffer size in frames (on return filled with actual minimum) </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>0 otherwise a negative error code if configuration space would become empty </dd></dl>
</div>
</div>
<a class="anchor" id="gaec830be678524b0a6a173896bc9d2c67"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_set_buffer_size_minmax" ref="gaec830be678524b0a6a173896bc9d2c67" args="(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_uframes_t *min, snd_pcm_uframes_t *max)" -->
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">int snd_pcm_hw_params_set_buffer_size_minmax </td>
<td>(</td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> * </td>
<td class="paramname"> <em>pcm</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#gab01fcfe9b97382a8d3f2027c664b8b8a">snd_pcm_uframes_t</a> * </td>
<td class="paramname"> <em>min</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#gab01fcfe9b97382a8d3f2027c664b8b8a">snd_pcm_uframes_t</a> * </td>
<td class="paramname"> <em>max</em></td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Restrict a configuration space to have buffer sizes in a given range. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>pcm</em> </td><td>PCM handle </td></tr>
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
<tr><td valign="top"></td><td valign="top"><em>min</em> </td><td>approximate minimum buffer size in frames (on return filled with actual minimum) </td></tr>
<tr><td valign="top"></td><td valign="top"><em>max</em> </td><td>approximate maximum buffer size in frames (on return filled with actual maximum) </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>0 otherwise a negative error code if configuration space would become empty </dd></dl>
</div>
</div>
<a class="anchor" id="ga2c00cb635d374030595dbc27b7a983a7"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_set_buffer_size_near" ref="ga2c00cb635d374030595dbc27b7a983a7" args="(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_uframes_t *val)" -->
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<div class="memproto">
<table class="memname">
<tr>
<td class="memname">int snd_pcm_hw_params_set_buffer_size_near </td>
<td>(</td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> * </td>
<td class="paramname"> <em>pcm</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#gab01fcfe9b97382a8d3f2027c664b8b8a">snd_pcm_uframes_t</a> * </td>
<td class="paramname"> <em>val</em></td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Restrict a configuration space to have buffer size nearest to a target. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>pcm</em> </td><td>PCM handle </td></tr>
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
<tr><td valign="top"></td><td valign="top"><em>val</em> </td><td>approximate target buffer size in frames / returned chosen approximate target buffer size in frames </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>0 otherwise a negative error code if configuration space is empty </dd></dl>
<dl><dt><b>Examples: </b></dt><dd><a class="el" href="_2test_2latency_8c-example.html#a14">/test/latency.c</a>.</dd>
</dl>
</div>
</div>
<a class="anchor" id="gacad42b93e31bca4c9b4074d6ec236d99"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_set_buffer_time" ref="gacad42b93e31bca4c9b4074d6ec236d99" args="(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int val, int dir)" -->
<div class="memitem">
<div class="memproto">
<table class="memname">
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<td class="memname">int snd_pcm_hw_params_set_buffer_time </td>
<td>(</td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> * </td>
<td class="paramname"> <em>pcm</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">unsigned int </td>
<td class="paramname"> <em>val</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int </td>
<td class="paramname"> <em>dir</em></td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Restrict a configuration space to contain only one buffer time. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>pcm</em> </td><td>PCM handle </td></tr>
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
<tr><td valign="top"></td><td valign="top"><em>val</em> </td><td>approximate buffer duration in us </td></tr>
<tr><td valign="top"></td><td valign="top"><em>dir</em> </td><td>Sub unit direction </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>0 otherwise a negative error code if configuration space would become empty</dd></dl>
<p>Wanted exact value is <,=,> val following dir (-1,0,1) </p>
</div>
</div>
<a class="anchor" id="ga6a29e5f80671ca89d0c185416b5a6c2c"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_set_buffer_time_first" ref="ga6a29e5f80671ca89d0c185416b5a6c2c" args="(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir)" -->
<div class="memitem">
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<td class="memname">int snd_pcm_hw_params_set_buffer_time_first </td>
<td>(</td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> * </td>
<td class="paramname"> <em>pcm</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">unsigned int * </td>
<td class="paramname"> <em>val</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int * </td>
<td class="paramname"> <em>dir</em></td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Restrict a configuration space to contain only its minimum buffer time. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>pcm</em> </td><td>PCM handle </td></tr>
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
<tr><td valign="top"></td><td valign="top"><em>val</em> </td><td>Returned approximate minimum buffer duration in us </td></tr>
<tr><td valign="top"></td><td valign="top"><em>dir</em> </td><td>Sub unit direction </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>0 otherwise a negative error code</dd></dl>
<p>Actual exact value is <,=,> the approximate one following dir (-1, 0, 1) </p>
</div>
</div>
<a class="anchor" id="gaec8788f14a0c5452dada23a49cdd4b71"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_set_buffer_time_last" ref="gaec8788f14a0c5452dada23a49cdd4b71" args="(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir)" -->
<div class="memitem">
<div class="memproto">
<table class="memname">
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<td class="memname">int snd_pcm_hw_params_set_buffer_time_last </td>
<td>(</td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> * </td>
<td class="paramname"> <em>pcm</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">unsigned int * </td>
<td class="paramname"> <em>val</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int * </td>
<td class="paramname"> <em>dir</em></td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Restrict a configuration space to contain only its maximum buffered time. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>pcm</em> </td><td>PCM handle </td></tr>
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
<tr><td valign="top"></td><td valign="top"><em>val</em> </td><td>Returned approximate maximum buffer duration in us </td></tr>
<tr><td valign="top"></td><td valign="top"><em>dir</em> </td><td>Sub unit direction </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>0 otherwise a negative error code</dd></dl>
<p>Actual exact value is <,=,> the approximate one following dir (-1, 0, 1) </p>
</div>
</div>
<a class="anchor" id="gab80680ff70b72435addde58e88fc1d7b"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_set_buffer_time_max" ref="gab80680ff70b72435addde58e88fc1d7b" args="(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir)" -->
<div class="memitem">
<div class="memproto">
<table class="memname">
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<td class="memname">int snd_pcm_hw_params_set_buffer_time_max </td>
<td>(</td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> * </td>
<td class="paramname"> <em>pcm</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">unsigned int * </td>
<td class="paramname"> <em>val</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int * </td>
<td class="paramname"> <em>dir</em></td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Restrict a configuration space with a maximum buffer time. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>pcm</em> </td><td>PCM handle </td></tr>
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
<tr><td valign="top"></td><td valign="top"><em>val</em> </td><td>approximate maximum buffer duration in us (on return filled with actual maximum) </td></tr>
<tr><td valign="top"></td><td valign="top"><em>dir</em> </td><td>Sub unit direction (on return filled with actual direction) </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>0 otherwise a negative error code if configuration space would become empty</dd></dl>
<p>Wanted/actual exact maximum is <,=,> val following dir (-1,0,1) </p>
</div>
</div>
<a class="anchor" id="ga2a7cb8c29b2fb75b615366dd40a7dc13"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_set_buffer_time_min" ref="ga2a7cb8c29b2fb75b615366dd40a7dc13" args="(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir)" -->
<div class="memitem">
<div class="memproto">
<table class="memname">
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<td class="memname">int snd_pcm_hw_params_set_buffer_time_min </td>
<td>(</td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> * </td>
<td class="paramname"> <em>pcm</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">unsigned int * </td>
<td class="paramname"> <em>val</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int * </td>
<td class="paramname"> <em>dir</em></td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td></td>
</tr>
</table>
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<div class="memdoc">
<p>Restrict a configuration space with a minimum buffer time. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>pcm</em> </td><td>PCM handle </td></tr>
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
<tr><td valign="top"></td><td valign="top"><em>val</em> </td><td>approximate minimum buffer duration in us (on return filled with actual minimum) </td></tr>
<tr><td valign="top"></td><td valign="top"><em>dir</em> </td><td>Sub unit direction (on return filled with actual direction) </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>0 otherwise a negative error code if configuration space would become empty</dd></dl>
<p>Wanted/actual exact minimum is <,=,> val following dir (-1,0,1) </p>
</div>
</div>
<a class="anchor" id="ga84964e55717a7db70b55f320b56f343f"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_set_buffer_time_minmax" ref="ga84964e55717a7db70b55f320b56f343f" args="(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *min, int *mindir, unsigned int *max, int *maxdir)" -->
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<td class="memname">int snd_pcm_hw_params_set_buffer_time_minmax </td>
<td>(</td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> * </td>
<td class="paramname"> <em>pcm</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">unsigned int * </td>
<td class="paramname"> <em>min</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int * </td>
<td class="paramname"> <em>mindir</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">unsigned int * </td>
<td class="paramname"> <em>max</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int * </td>
<td class="paramname"> <em>maxdir</em></td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Restrict a configuration space to have buffer times in a given range. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>pcm</em> </td><td>PCM handle </td></tr>
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
<tr><td valign="top"></td><td valign="top"><em>min</em> </td><td>approximate minimum buffer duration in us (on return filled with actual minimum) </td></tr>
<tr><td valign="top"></td><td valign="top"><em>mindir</em> </td><td>Sub unit direction for minimum (on return filled with actual direction) </td></tr>
<tr><td valign="top"></td><td valign="top"><em>max</em> </td><td>approximate maximum buffer duration in us (on return filled with actual maximum) </td></tr>
<tr><td valign="top"></td><td valign="top"><em>maxdir</em> </td><td>Sub unit direction for maximum (on return filled with actual direction) </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>0 otherwise a negative error code if configuration space would become empty</dd></dl>
<p>Wanted/actual exact min/max is <,=,> val following dir (-1,0,1) </p>
</div>
</div>
<a class="anchor" id="ga3bc1b188576d6d2daae9c56024813d10"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_set_buffer_time_near" ref="ga3bc1b188576d6d2daae9c56024813d10" args="(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir)" -->
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<td class="memname">int snd_pcm_hw_params_set_buffer_time_near </td>
<td>(</td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> * </td>
<td class="paramname"> <em>pcm</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">unsigned int * </td>
<td class="paramname"> <em>val</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int * </td>
<td class="paramname"> <em>dir</em></td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Restrict a configuration space to have buffer time nearest to a target. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>pcm</em> </td><td>PCM handle </td></tr>
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
<tr><td valign="top"></td><td valign="top"><em>val</em> </td><td>approximate target buffer duration in us / returned chosen approximate target buffer duration </td></tr>
<tr><td valign="top"></td><td valign="top"><em>dir</em> </td><td>Sub unit direction </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>0 otherwise a negative error code if configuration space is empty</dd></dl>
<p>target/chosen exact value is <,=,> val following dir (-1,0,1) </p>
<dl><dt><b>Examples: </b></dt><dd><a class="el" href="_2test_2pcm_8c-example.html#a22">/test/pcm.c</a>.</dd>
</dl>
</div>
</div>
<a class="anchor" id="ga3a5b2a05c5d9869cc743dac71c0d270a"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_set_channels" ref="ga3a5b2a05c5d9869cc743dac71c0d270a" args="(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int val)" -->
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<td class="memname">int snd_pcm_hw_params_set_channels </td>
<td>(</td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> * </td>
<td class="paramname"> <em>pcm</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">unsigned int </td>
<td class="paramname"> <em>val</em></td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Restrict a configuration space to contain only one channels count. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>pcm</em> </td><td>PCM handle </td></tr>
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
<tr><td valign="top"></td><td valign="top"><em>val</em> </td><td>channels count </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>0 otherwise a negative error code if configuration space would become empty </dd></dl>
<dl><dt><b>Examples: </b></dt><dd><a class="el" href="_2test_2latency_8c-example.html#a10">/test/latency.c</a>, and <a class="el" href="_2test_2pcm_8c-example.html#a20">/test/pcm.c</a>.</dd>
</dl>
</div>
</div>
<a class="anchor" id="gae08e3371d3d2e8e512537630a59f9a55"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_set_channels_first" ref="gae08e3371d3d2e8e512537630a59f9a55" args="(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val)" -->
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<td class="memname">int snd_pcm_hw_params_set_channels_first </td>
<td>(</td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> * </td>
<td class="paramname"> <em>pcm</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">unsigned int * </td>
<td class="paramname"> <em>val</em></td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Restrict a configuration space to contain only its minimum channels count. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>pcm</em> </td><td>PCM handle </td></tr>
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
<tr><td valign="top"></td><td valign="top"><em>val</em> </td><td>minimum channels count </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>0 otherwise a negative error code </dd></dl>
</div>
</div>
<a class="anchor" id="ga54846380c1dc99ee9124d45232931ebd"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_set_channels_last" ref="ga54846380c1dc99ee9124d45232931ebd" args="(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val)" -->
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<td class="memname">int snd_pcm_hw_params_set_channels_last </td>
<td>(</td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> * </td>
<td class="paramname"> <em>pcm</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">unsigned int * </td>
<td class="paramname"> <em>val</em></td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Restrict a configuration space to contain only its maximum channels count. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>pcm</em> </td><td>PCM handle </td></tr>
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
<tr><td valign="top"></td><td valign="top"><em>val</em> </td><td>maximum channels count </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>0 otherwise a negative error code </dd></dl>
</div>
</div>
<a class="anchor" id="ga739d51d0822f182a6583a5436f410b34"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_set_channels_max" ref="ga739d51d0822f182a6583a5436f410b34" args="(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val)" -->
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<td class="memname">int snd_pcm_hw_params_set_channels_max </td>
<td>(</td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> * </td>
<td class="paramname"> <em>pcm</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">unsigned int * </td>
<td class="paramname"> <em>val</em></td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Restrict a configuration space with a maximum channels count. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>pcm</em> </td><td>PCM handle </td></tr>
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
<tr><td valign="top"></td><td valign="top"><em>val</em> </td><td>maximum channels count (on return filled with actual maximum) </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>0 otherwise a negative error code if configuration space would become empty </dd></dl>
</div>
</div>
<a class="anchor" id="ga155b8ac646b90560cd00f195086ff464"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_set_channels_min" ref="ga155b8ac646b90560cd00f195086ff464" args="(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val)" -->
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<td class="memname">int snd_pcm_hw_params_set_channels_min </td>
<td>(</td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> * </td>
<td class="paramname"> <em>pcm</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">unsigned int * </td>
<td class="paramname"> <em>val</em></td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Restrict a configuration space with a minimum channels count. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>pcm</em> </td><td>PCM handle </td></tr>
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
<tr><td valign="top"></td><td valign="top"><em>val</em> </td><td>minimum channels count (on return filled with actual minimum) </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>0 otherwise a negative error code if configuration space would become empty </dd></dl>
</div>
</div>
<a class="anchor" id="ga24e507c965aff4984aa4969cc896e830"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_set_channels_minmax" ref="ga24e507c965aff4984aa4969cc896e830" args="(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *min, unsigned int *max)" -->
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<td class="memname">int snd_pcm_hw_params_set_channels_minmax </td>
<td>(</td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> * </td>
<td class="paramname"> <em>pcm</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">unsigned int * </td>
<td class="paramname"> <em>min</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">unsigned int * </td>
<td class="paramname"> <em>max</em></td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Restrict a configuration space to have channels counts in a given range. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>pcm</em> </td><td>PCM handle </td></tr>
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
<tr><td valign="top"></td><td valign="top"><em>min</em> </td><td>minimum channels count (on return filled with actual minimum) </td></tr>
<tr><td valign="top"></td><td valign="top"><em>max</em> </td><td>maximum channels count (on return filled with actual maximum) </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>0 otherwise a negative error code if configuration space would become empty </dd></dl>
</div>
</div>
<a class="anchor" id="ga59aa9e1a02f4ce616fe92c605a833f8f"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_set_channels_near" ref="ga59aa9e1a02f4ce616fe92c605a833f8f" args="(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val)" -->
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<td class="memname">int snd_pcm_hw_params_set_channels_near </td>
<td>(</td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> * </td>
<td class="paramname"> <em>pcm</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">unsigned int * </td>
<td class="paramname"> <em>val</em></td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Restrict a configuration space to have channels count nearest to a target. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>pcm</em> </td><td>PCM handle </td></tr>
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
<tr><td valign="top"></td><td valign="top"><em>val</em> </td><td>target channels count, returned chosen channels count </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>0 otherwise a negative error code if configuration space is empty </dd></dl>
</div>
</div>
<a class="anchor" id="ga2c0b6b22bbeed5da06293608f3be844d"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_set_export_buffer" ref="ga2c0b6b22bbeed5da06293608f3be844d" args="(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int val)" -->
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<td class="memname">int snd_pcm_hw_params_set_export_buffer </td>
<td>(</td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> * </td>
<td class="paramname"> <em>pcm</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">unsigned int </td>
<td class="paramname"> <em>val</em></td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Restrict a configuration space to allow the buffer accessible from outside. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>pcm</em> </td><td>PCM handle </td></tr>
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
<tr><td valign="top"></td><td valign="top"><em>val</em> </td><td>0 = disable, 1 = enable (default) exporting buffer </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>0 otherwise a negative error code </dd></dl>
</div>
</div>
<a class="anchor" id="ga6014e0e1ec7934f8c745290e83e59199"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_set_format" ref="ga6014e0e1ec7934f8c745290e83e59199" args="(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_format_t val)" -->
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">int snd_pcm_hw_params_set_format </td>
<td>(</td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> * </td>
<td class="paramname"> <em>pcm</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#gaa14b7f26877a812acbb39811364177f8">snd_pcm_format_t</a> </td>
<td class="paramname"> <em>format</em></td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Restrict a configuration space to contain only one format. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>pcm</em> </td><td>PCM handle </td></tr>
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
<tr><td valign="top"></td><td valign="top"><em>format</em> </td><td>format </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>0 otherwise a negative error code </dd></dl>
<dl><dt><b>Examples: </b></dt><dd><a class="el" href="_2test_2latency_8c-example.html#a9">/test/latency.c</a>, and <a class="el" href="_2test_2pcm_8c-example.html#a19">/test/pcm.c</a>.</dd>
</dl>
</div>
</div>
<a class="anchor" id="ga762ee356cc687c81c206df3c18245e4a"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_set_format_first" ref="ga762ee356cc687c81c206df3c18245e4a" args="(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_format_t *format)" -->
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">int snd_pcm_hw_params_set_format_first </td>
<td>(</td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> * </td>
<td class="paramname"> <em>pcm</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#gaa14b7f26877a812acbb39811364177f8">snd_pcm_format_t</a> * </td>
<td class="paramname"> <em>format</em></td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Restrict a configuration space to contain only its first format. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>pcm</em> </td><td>PCM handle </td></tr>
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
<tr><td valign="top"></td><td valign="top"><em>format</em> </td><td>Returned first format </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>0 otherwise a negative error code </dd></dl>
</div>
</div>
<a class="anchor" id="ga4a643db96742a3da0287eda6cc3eafa2"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_set_format_last" ref="ga4a643db96742a3da0287eda6cc3eafa2" args="(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_format_t *format)" -->
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">int snd_pcm_hw_params_set_format_last </td>
<td>(</td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> * </td>
<td class="paramname"> <em>pcm</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#gaa14b7f26877a812acbb39811364177f8">snd_pcm_format_t</a> * </td>
<td class="paramname"> <em>format</em></td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Restrict a configuration space to contain only its last format. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>pcm</em> </td><td>PCM handle </td></tr>
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
<tr><td valign="top"></td><td valign="top"><em>format</em> </td><td>Returned last format </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>0 otherwise a negative error code </dd></dl>
</div>
</div>
<a class="anchor" id="ga33261bd41636eb28fd42493e4ea4efba"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_set_format_mask" ref="ga33261bd41636eb28fd42493e4ea4efba" args="(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_format_mask_t *mask)" -->
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">int snd_pcm_hw_params_set_format_mask </td>
<td>(</td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> * </td>
<td class="paramname"> <em>pcm</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga0936aa9ac0051a3611583a2740915545">snd_pcm_format_mask_t</a> * </td>
<td class="paramname"> <em>mask</em></td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Restrict a configuration space to contain only a set of formats. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>pcm</em> </td><td>PCM handle </td></tr>
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
<tr><td valign="top"></td><td valign="top"><em>mask</em> </td><td>Format mask </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>0 otherwise a negative error code </dd></dl>
</div>
</div>
<a class="anchor" id="ga874c977dd9aac275c87a7b1c33a0dec0"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_set_period_size" ref="ga874c977dd9aac275c87a7b1c33a0dec0" args="(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_uframes_t val, int dir)" -->
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">int snd_pcm_hw_params_set_period_size </td>
<td>(</td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> * </td>
<td class="paramname"> <em>pcm</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#gab01fcfe9b97382a8d3f2027c664b8b8a">snd_pcm_uframes_t</a> </td>
<td class="paramname"> <em>val</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int </td>
<td class="paramname"> <em>dir</em></td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Restrict a configuration space to contain only one period size. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>pcm</em> </td><td>PCM handle </td></tr>
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
<tr><td valign="top"></td><td valign="top"><em>val</em> </td><td>approximate period size in frames </td></tr>
<tr><td valign="top"></td><td valign="top"><em>dir</em> </td><td>Sub unit direction </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>0 otherwise a negative error code if configuration space would become empty</dd></dl>
<p>Wanted exact value is <,=,> val following dir (-1,0,1) </p>
</div>
</div>
<a class="anchor" id="gaf74bbb66a71ece8260be20502822335b"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_set_period_size_first" ref="gaf74bbb66a71ece8260be20502822335b" args="(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_uframes_t *val, int *dir)" -->
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">int snd_pcm_hw_params_set_period_size_first </td>
<td>(</td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> * </td>
<td class="paramname"> <em>pcm</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#gab01fcfe9b97382a8d3f2027c664b8b8a">snd_pcm_uframes_t</a> * </td>
<td class="paramname"> <em>val</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int * </td>
<td class="paramname"> <em>dir</em></td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Restrict a configuration space to contain only its minimum period size. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>pcm</em> </td><td>PCM handle </td></tr>
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
<tr><td valign="top"></td><td valign="top"><em>val</em> </td><td>Returned maximum approximate period size in frames </td></tr>
<tr><td valign="top"></td><td valign="top"><em>dir</em> </td><td>Sub unit direction </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>0 otherwise a negative error code</dd></dl>
<p>Actual exact value is <,=,> the approximate one following dir (-1, 0, 1) </p>
</div>
</div>
<a class="anchor" id="ga13bc85ca5fe34b19112579a7e27cf41a"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_set_period_size_integer" ref="ga13bc85ca5fe34b19112579a7e27cf41a" args="(snd_pcm_t *pcm, snd_pcm_hw_params_t *params)" -->
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">int snd_pcm_hw_params_set_period_size_integer </td>
<td>(</td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> * </td>
<td class="paramname"> <em>pcm</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em></td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Restrict a configuration space to contain only integer period sizes. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>pcm</em> </td><td>PCM handle </td></tr>
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>0 otherwise a negative error code if configuration space would become empty </dd></dl>
</div>
</div>
<a class="anchor" id="gad0bce0ad23b3b708858bb20df81e09a2"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_set_period_size_last" ref="gad0bce0ad23b3b708858bb20df81e09a2" args="(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_uframes_t *val, int *dir)" -->
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">int snd_pcm_hw_params_set_period_size_last </td>
<td>(</td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> * </td>
<td class="paramname"> <em>pcm</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#gab01fcfe9b97382a8d3f2027c664b8b8a">snd_pcm_uframes_t</a> * </td>
<td class="paramname"> <em>val</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int * </td>
<td class="paramname"> <em>dir</em></td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Restrict a configuration space to contain only its maximum period size. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>pcm</em> </td><td>PCM handle </td></tr>
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
<tr><td valign="top"></td><td valign="top"><em>val</em> </td><td>Returned maximum approximate period size in frames </td></tr>
<tr><td valign="top"></td><td valign="top"><em>dir</em> </td><td>Sub unit direction </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>0 otherwise a negative error code</dd></dl>
<p>Actual exact value is <,=,> the approximate one following dir (-1, 0, 1) </p>
</div>
</div>
<a class="anchor" id="ga909f442c3d8c20b79de2edf6cc5ded41"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_set_period_size_max" ref="ga909f442c3d8c20b79de2edf6cc5ded41" args="(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_uframes_t *val, int *dir)" -->
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">int snd_pcm_hw_params_set_period_size_max </td>
<td>(</td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> * </td>
<td class="paramname"> <em>pcm</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#gab01fcfe9b97382a8d3f2027c664b8b8a">snd_pcm_uframes_t</a> * </td>
<td class="paramname"> <em>val</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int * </td>
<td class="paramname"> <em>dir</em></td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Restrict a configuration space with a maximum period size. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>pcm</em> </td><td>PCM handle </td></tr>
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
<tr><td valign="top"></td><td valign="top"><em>val</em> </td><td>approximate maximum period size in frames (on return filled with actual maximum) </td></tr>
<tr><td valign="top"></td><td valign="top"><em>dir</em> </td><td>Sub unit direction (on return filled with actual direction) </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>0 otherwise a negative error code if configuration space would become empty</dd></dl>
<p>Wanted/actual exact minimum is <,=,> val following dir (-1,0,1) </p>
</div>
</div>
<a class="anchor" id="ga58e0468994d935f08080d9654f1b48b8"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_set_period_size_min" ref="ga58e0468994d935f08080d9654f1b48b8" args="(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_uframes_t *val, int *dir)" -->
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">int snd_pcm_hw_params_set_period_size_min </td>
<td>(</td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> * </td>
<td class="paramname"> <em>pcm</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#gab01fcfe9b97382a8d3f2027c664b8b8a">snd_pcm_uframes_t</a> * </td>
<td class="paramname"> <em>val</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int * </td>
<td class="paramname"> <em>dir</em></td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td></td>
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<div class="memdoc">
<p>Restrict a configuration space with a minimum period size. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>pcm</em> </td><td>PCM handle </td></tr>
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
<tr><td valign="top"></td><td valign="top"><em>val</em> </td><td>approximate minimum period size in frames (on return filled with actual minimum) </td></tr>
<tr><td valign="top"></td><td valign="top"><em>dir</em> </td><td>Sub unit direction (on return filled with actual direction) </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>0 otherwise a negative error code if configuration space would become empty</dd></dl>
<p>Wanted/actual exact minimum is <,=,> val following dir (-1,0,1) </p>
</div>
</div>
<a class="anchor" id="ga33c901f8364cb2533d6cdeba732e0e4e"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_set_period_size_minmax" ref="ga33c901f8364cb2533d6cdeba732e0e4e" args="(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_uframes_t *min, int *mindir, snd_pcm_uframes_t *max, int *maxdir)" -->
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<td class="memname">int snd_pcm_hw_params_set_period_size_minmax </td>
<td>(</td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> * </td>
<td class="paramname"> <em>pcm</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#gab01fcfe9b97382a8d3f2027c664b8b8a">snd_pcm_uframes_t</a> * </td>
<td class="paramname"> <em>min</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int * </td>
<td class="paramname"> <em>mindir</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#gab01fcfe9b97382a8d3f2027c664b8b8a">snd_pcm_uframes_t</a> * </td>
<td class="paramname"> <em>max</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int * </td>
<td class="paramname"> <em>maxdir</em></td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Restrict a configuration space to have period sizes in a given range. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>pcm</em> </td><td>PCM handle </td></tr>
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
<tr><td valign="top"></td><td valign="top"><em>min</em> </td><td>approximate minimum period size in frames (on return filled with actual minimum) </td></tr>
<tr><td valign="top"></td><td valign="top"><em>mindir</em> </td><td>Sub unit direction for minimum (on return filled with actual direction) </td></tr>
<tr><td valign="top"></td><td valign="top"><em>max</em> </td><td>approximate maximum period size in frames (on return filled with actual maximum) </td></tr>
<tr><td valign="top"></td><td valign="top"><em>maxdir</em> </td><td>Sub unit direction for maximum (on return filled with actual direction) </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>0 otherwise a negative error code if configuration space would become empty</dd></dl>
<p>Wanted/actual exact min/max is <,=,> val following dir (-1,0,1) </p>
</div>
</div>
<a class="anchor" id="ga9162045265f283c532634506456cab09"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_set_period_size_near" ref="ga9162045265f283c532634506456cab09" args="(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_uframes_t *val, int *dir)" -->
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<td class="memname">int snd_pcm_hw_params_set_period_size_near </td>
<td>(</td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> * </td>
<td class="paramname"> <em>pcm</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#gab01fcfe9b97382a8d3f2027c664b8b8a">snd_pcm_uframes_t</a> * </td>
<td class="paramname"> <em>val</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int * </td>
<td class="paramname"> <em>dir</em></td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Restrict a configuration space to have period size nearest to a target. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>pcm</em> </td><td>PCM handle </td></tr>
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
<tr><td valign="top"></td><td valign="top"><em>val</em> </td><td>approximate target period size in frames / returned chosen approximate target period size </td></tr>
<tr><td valign="top"></td><td valign="top"><em>dir</em> </td><td>Sub unit direction </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>0 otherwise a negative error code if configuration space is empty</dd></dl>
<p>target/chosen exact value is <,=,> val following dir (-1,0,1) </p>
<dl><dt><b>Examples: </b></dt><dd><a class="el" href="_2test_2latency_8c-example.html#a15">/test/latency.c</a>.</dd>
</dl>
</div>
</div>
<a class="anchor" id="gaa2bc2a32d3971521064741a30e10c92f"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_set_period_time" ref="gaa2bc2a32d3971521064741a30e10c92f" args="(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int val, int dir)" -->
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<td class="memname">int snd_pcm_hw_params_set_period_time </td>
<td>(</td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> * </td>
<td class="paramname"> <em>pcm</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">unsigned int </td>
<td class="paramname"> <em>val</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int </td>
<td class="paramname"> <em>dir</em></td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Restrict a configuration space to contain only one period time. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>pcm</em> </td><td>PCM handle </td></tr>
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
<tr><td valign="top"></td><td valign="top"><em>val</em> </td><td>approximate period duration in us </td></tr>
<tr><td valign="top"></td><td valign="top"><em>dir</em> </td><td>Sub unit direction </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>0 otherwise a negative error code if configuration space would become empty</dd></dl>
<p>Wanted exact value is <,=,> val following dir (-1,0,1) </p>
</div>
</div>
<a class="anchor" id="ga478e50e1fa7395af70100b906c31cb67"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_set_period_time_first" ref="ga478e50e1fa7395af70100b906c31cb67" args="(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir)" -->
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<td class="memname">int snd_pcm_hw_params_set_period_time_first </td>
<td>(</td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> * </td>
<td class="paramname"> <em>pcm</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">unsigned int * </td>
<td class="paramname"> <em>val</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int * </td>
<td class="paramname"> <em>dir</em></td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Restrict a configuration space to contain only its minimum period time. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>pcm</em> </td><td>PCM handle </td></tr>
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
<tr><td valign="top"></td><td valign="top"><em>val</em> </td><td>Returned approximate period duration in us </td></tr>
<tr><td valign="top"></td><td valign="top"><em>dir</em> </td><td>Sub unit direction </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>0 otherwise a negative error code</dd></dl>
<p>Actual exact value is <,=,> the approximate one following dir (-1, 0, 1) </p>
</div>
</div>
<a class="anchor" id="ga2d48b4bee369912b0fc9b245d6c7a52d"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_set_period_time_last" ref="ga2d48b4bee369912b0fc9b245d6c7a52d" args="(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir)" -->
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<td class="memname">int snd_pcm_hw_params_set_period_time_last </td>
<td>(</td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> * </td>
<td class="paramname"> <em>pcm</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">unsigned int * </td>
<td class="paramname"> <em>val</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int * </td>
<td class="paramname"> <em>dir</em></td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td></td>
</tr>
</table>
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<div class="memdoc">
<p>Restrict a configuration space to contain only its maximum period time. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>pcm</em> </td><td>PCM handle </td></tr>
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
<tr><td valign="top"></td><td valign="top"><em>val</em> </td><td>Returned maximum approximate period time </td></tr>
<tr><td valign="top"></td><td valign="top"><em>dir</em> </td><td>Sub unit direction </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>approximate period duration in us </dd></dl>
</div>
</div>
<a class="anchor" id="gaad53e3af1f1fe522c3d902f5403954d1"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_set_period_time_max" ref="gaad53e3af1f1fe522c3d902f5403954d1" args="(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir)" -->
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<td class="memname">int snd_pcm_hw_params_set_period_time_max </td>
<td>(</td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> * </td>
<td class="paramname"> <em>pcm</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">unsigned int * </td>
<td class="paramname"> <em>val</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int * </td>
<td class="paramname"> <em>dir</em></td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Restrict a configuration space with a maximum period time. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>pcm</em> </td><td>PCM handle </td></tr>
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
<tr><td valign="top"></td><td valign="top"><em>val</em> </td><td>approximate maximum period duration in us (on return filled with actual maximum) </td></tr>
<tr><td valign="top"></td><td valign="top"><em>dir</em> </td><td>Sub unit direction (on return filled with actual direction) </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>0 otherwise a negative error code if configuration space would become empty</dd></dl>
<p>Wanted/actual exact maximum is <,=,> val following dir (-1,0,1) </p>
</div>
</div>
<a class="anchor" id="ga2dc9fcdb1b30126a20d96a65c7826d9b"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_set_period_time_min" ref="ga2dc9fcdb1b30126a20d96a65c7826d9b" args="(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir)" -->
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<td class="memname">int snd_pcm_hw_params_set_period_time_min </td>
<td>(</td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> * </td>
<td class="paramname"> <em>pcm</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">unsigned int * </td>
<td class="paramname"> <em>val</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int * </td>
<td class="paramname"> <em>dir</em></td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td></td>
</tr>
</table>
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<div class="memdoc">
<p>Restrict a configuration space with a minimum period time. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>pcm</em> </td><td>PCM handle </td></tr>
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
<tr><td valign="top"></td><td valign="top"><em>val</em> </td><td>approximate minimum period duration in us (on return filled with actual minimum) </td></tr>
<tr><td valign="top"></td><td valign="top"><em>dir</em> </td><td>Sub unit direction (on return filled with actual direction) </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>0 otherwise a negative error code if configuration space would become empty</dd></dl>
<p>Wanted/actual exact minimum is <,=,> val following dir (-1,0,1) </p>
</div>
</div>
<a class="anchor" id="ga993e05e43a31a6151427ba1f793c0b3a"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_set_period_time_minmax" ref="ga993e05e43a31a6151427ba1f793c0b3a" args="(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *min, int *mindir, unsigned int *max, int *maxdir)" -->
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<td class="memname">int snd_pcm_hw_params_set_period_time_minmax </td>
<td>(</td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> * </td>
<td class="paramname"> <em>pcm</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">unsigned int * </td>
<td class="paramname"> <em>min</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int * </td>
<td class="paramname"> <em>mindir</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">unsigned int * </td>
<td class="paramname"> <em>max</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int * </td>
<td class="paramname"> <em>maxdir</em></td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Restrict a configuration space to have period times in a given range. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>pcm</em> </td><td>PCM handle </td></tr>
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
<tr><td valign="top"></td><td valign="top"><em>min</em> </td><td>approximate minimum period duration in us (on return filled with actual minimum) </td></tr>
<tr><td valign="top"></td><td valign="top"><em>mindir</em> </td><td>Sub unit direction for minimum (on return filled with actual direction) </td></tr>
<tr><td valign="top"></td><td valign="top"><em>max</em> </td><td>approximate maximum period duration in us (on return filled with actual maximum) </td></tr>
<tr><td valign="top"></td><td valign="top"><em>maxdir</em> </td><td>Sub unit direction for maximum (on return filled with actual direction) </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>0 otherwise a negative error code if configuration space would become empty</dd></dl>
<p>Wanted/actual exact min/max is <,=,> val following dir (-1,0,1) </p>
</div>
</div>
<a class="anchor" id="gaa22d4f917c300b0c1f47b348c23705a4"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_set_period_time_near" ref="gaa22d4f917c300b0c1f47b348c23705a4" args="(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir)" -->
<div class="memitem">
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<tr>
<td class="memname">int snd_pcm_hw_params_set_period_time_near </td>
<td>(</td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> * </td>
<td class="paramname"> <em>pcm</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">unsigned int * </td>
<td class="paramname"> <em>val</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int * </td>
<td class="paramname"> <em>dir</em></td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Restrict a configuration space to have period time nearest to a target. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>pcm</em> </td><td>PCM handle </td></tr>
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
<tr><td valign="top"></td><td valign="top"><em>val</em> </td><td>approximate target period duration in us / returned chosen approximate target period duration </td></tr>
<tr><td valign="top"></td><td valign="top"><em>dir</em> </td><td>Sub unit direction </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>0 otherwise a negative error code if configuration space is empty</dd></dl>
<p>target/chosen exact value is <,=,> val following dir (-1,0,1) </p>
<dl><dt><b>Examples: </b></dt><dd><a class="el" href="_2test_2pcm_8c-example.html#a24">/test/pcm.c</a>.</dd>
</dl>
</div>
</div>
<a class="anchor" id="ga472aa3f2d8ce4040caa874fe60aba961"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_set_periods" ref="ga472aa3f2d8ce4040caa874fe60aba961" args="(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int val, int dir)" -->
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<td class="memname">int snd_pcm_hw_params_set_periods </td>
<td>(</td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> * </td>
<td class="paramname"> <em>pcm</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">unsigned int </td>
<td class="paramname"> <em>val</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int </td>
<td class="paramname"> <em>dir</em></td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Restrict a configuration space to contain only one periods count. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>pcm</em> </td><td>PCM handle </td></tr>
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
<tr><td valign="top"></td><td valign="top"><em>val</em> </td><td>approximate periods per buffer </td></tr>
<tr><td valign="top"></td><td valign="top"><em>dir</em> </td><td>Sub unit direction </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>0 otherwise a negative error code if configuration space would become empty</dd></dl>
<p>Wanted exact value is <,=,> val following dir (-1,0,1) </p>
</div>
</div>
<a class="anchor" id="gaa8fbd81ce54fac30f60768fb36210a6f"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_set_periods_first" ref="gaa8fbd81ce54fac30f60768fb36210a6f" args="(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir)" -->
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<div class="memproto">
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<td class="memname">int snd_pcm_hw_params_set_periods_first </td>
<td>(</td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> * </td>
<td class="paramname"> <em>pcm</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">unsigned int * </td>
<td class="paramname"> <em>val</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int * </td>
<td class="paramname"> <em>dir</em></td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Restrict a configuration space to contain only its minimum periods count. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>pcm</em> </td><td>PCM handle </td></tr>
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
<tr><td valign="top"></td><td valign="top"><em>val</em> </td><td>Returned approximate minimum periods per buffer </td></tr>
<tr><td valign="top"></td><td valign="top"><em>dir</em> </td><td>Sub unit direction </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>0 otherwise a negative error code</dd></dl>
<p>Actual exact value is <,=,> the approximate one following dir (-1, 0, 1) </p>
</div>
</div>
<a class="anchor" id="gab7356d30758dfcf11ff5874fd033913b"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_set_periods_integer" ref="gab7356d30758dfcf11ff5874fd033913b" args="(snd_pcm_t *pcm, snd_pcm_hw_params_t *params)" -->
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<td class="memname">int snd_pcm_hw_params_set_periods_integer </td>
<td>(</td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> * </td>
<td class="paramname"> <em>pcm</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em></td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Restrict a configuration space to contain only integer periods counts. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>pcm</em> </td><td>PCM handle </td></tr>
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>0 otherwise a negative error code if configuration space would become empty </dd></dl>
</div>
</div>
<a class="anchor" id="ga1366dd00b920ef459d2dbf8a64408725"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_set_periods_last" ref="ga1366dd00b920ef459d2dbf8a64408725" args="(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir)" -->
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">int snd_pcm_hw_params_set_periods_last </td>
<td>(</td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> * </td>
<td class="paramname"> <em>pcm</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">unsigned int * </td>
<td class="paramname"> <em>val</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int * </td>
<td class="paramname"> <em>dir</em></td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Restrict a configuration space to contain only its maximum periods count. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>pcm</em> </td><td>PCM handle </td></tr>
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
<tr><td valign="top"></td><td valign="top"><em>val</em> </td><td>Returned approximate maximum periods per buffer </td></tr>
<tr><td valign="top"></td><td valign="top"><em>dir</em> </td><td>Sub unit direction </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>0 otherwise a negative error code</dd></dl>
<p>Actual exact value is <,=,> the approximate one following dir (-1, 0, 1) </p>
</div>
</div>
<a class="anchor" id="ga636d1d9a6333fb2acc8a6e84391ea0a6"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_set_periods_max" ref="ga636d1d9a6333fb2acc8a6e84391ea0a6" args="(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir)" -->
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<td class="memname">int snd_pcm_hw_params_set_periods_max </td>
<td>(</td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> * </td>
<td class="paramname"> <em>pcm</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">unsigned int * </td>
<td class="paramname"> <em>val</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int * </td>
<td class="paramname"> <em>dir</em></td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Restrict a configuration space with a maximum periods count. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>pcm</em> </td><td>PCM handle </td></tr>
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
<tr><td valign="top"></td><td valign="top"><em>val</em> </td><td>approximate maximum periods per buffer (on return filled with actual maximum) </td></tr>
<tr><td valign="top"></td><td valign="top"><em>dir</em> </td><td>Sub unit direction (on return filled with actual direction) </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>0 otherwise a negative error code if configuration space would become empty</dd></dl>
<p>Wanted/actual exact maximum is <,=,> val following dir (-1,0,1) </p>
</div>
</div>
<a class="anchor" id="gaa2642b54ed1c2e26e595ecf3d5b29edc"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_set_periods_min" ref="gaa2642b54ed1c2e26e595ecf3d5b29edc" args="(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir)" -->
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<td class="memname">int snd_pcm_hw_params_set_periods_min </td>
<td>(</td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> * </td>
<td class="paramname"> <em>pcm</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">unsigned int * </td>
<td class="paramname"> <em>val</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int * </td>
<td class="paramname"> <em>dir</em></td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Restrict a configuration space with a minimum periods count. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>pcm</em> </td><td>PCM handle </td></tr>
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
<tr><td valign="top"></td><td valign="top"><em>val</em> </td><td>approximate minimum periods per buffer (on return filled with actual minimum) </td></tr>
<tr><td valign="top"></td><td valign="top"><em>dir</em> </td><td>Sub unit direction (on return filled with actual direction) </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>0 otherwise a negative error code if configuration space would become empty</dd></dl>
<p>Wanted/actual exact minimum is <,=,> val following dir (-1,0,1) </p>
</div>
</div>
<a class="anchor" id="gaf638d94e53872415d3bb6d9169104891"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_set_periods_minmax" ref="gaf638d94e53872415d3bb6d9169104891" args="(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *min, int *mindir, unsigned int *max, int *maxdir)" -->
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<td class="memname">int snd_pcm_hw_params_set_periods_minmax </td>
<td>(</td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> * </td>
<td class="paramname"> <em>pcm</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">unsigned int * </td>
<td class="paramname"> <em>min</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int * </td>
<td class="paramname"> <em>mindir</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">unsigned int * </td>
<td class="paramname"> <em>max</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int * </td>
<td class="paramname"> <em>maxdir</em></td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Restrict a configuration space to have periods counts in a given range. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>pcm</em> </td><td>PCM handle </td></tr>
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
<tr><td valign="top"></td><td valign="top"><em>min</em> </td><td>approximate minimum periods per buffer (on return filled with actual minimum) </td></tr>
<tr><td valign="top"></td><td valign="top"><em>mindir</em> </td><td>Sub unit direction for minimum (on return filled with actual direction) </td></tr>
<tr><td valign="top"></td><td valign="top"><em>max</em> </td><td>approximate maximum periods per buffer (on return filled with actual maximum) </td></tr>
<tr><td valign="top"></td><td valign="top"><em>maxdir</em> </td><td>Sub unit direction for maximum (on return filled with actual direction) </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>0 otherwise a negative error code if configuration space would become empty</dd></dl>
<p>Wanted/actual exact min/max is <,=,> val following dir (-1,0,1) </p>
</div>
</div>
<a class="anchor" id="ga2fadb73803f58b900ac34846c14894ca"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_set_periods_near" ref="ga2fadb73803f58b900ac34846c14894ca" args="(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir)" -->
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<table class="memname">
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<td class="memname">int snd_pcm_hw_params_set_periods_near </td>
<td>(</td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> * </td>
<td class="paramname"> <em>pcm</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">unsigned int * </td>
<td class="paramname"> <em>val</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int * </td>
<td class="paramname"> <em>dir</em></td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Restrict a configuration space to have periods count nearest to a target. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>pcm</em> </td><td>PCM handle </td></tr>
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
<tr><td valign="top"></td><td valign="top"><em>val</em> </td><td>approximate target periods per buffer / returned chosen approximate target periods per buffer </td></tr>
<tr><td valign="top"></td><td valign="top"><em>dir</em> </td><td>Sub unit direction </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>0 otherwise a negative error code if configuration space is empty</dd></dl>
<p>target/chosen exact value is <,=,> val following dir (-1,0,1) </p>
</div>
</div>
<a class="anchor" id="ga29cd2571738847813af1489043d1af5a"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_set_rate" ref="ga29cd2571738847813af1489043d1af5a" args="(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int val, int dir)" -->
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<td class="memname">int snd_pcm_hw_params_set_rate </td>
<td>(</td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> * </td>
<td class="paramname"> <em>pcm</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">unsigned int </td>
<td class="paramname"> <em>val</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int </td>
<td class="paramname"> <em>dir</em></td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Restrict a configuration space to contain only one rate. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>pcm</em> </td><td>PCM handle </td></tr>
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
<tr><td valign="top"></td><td valign="top"><em>val</em> </td><td>approximate rate </td></tr>
<tr><td valign="top"></td><td valign="top"><em>dir</em> </td><td>Sub unit direction </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>0 otherwise a negative error code if configuration space would become empty</dd></dl>
<p>Wanted exact value is <,=,> val following dir (-1,0,1) </p>
</div>
</div>
<a class="anchor" id="gac0ded856c76459608fdd5ea0f254349e"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_set_rate_first" ref="gac0ded856c76459608fdd5ea0f254349e" args="(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir)" -->
<div class="memitem">
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<td class="memname">int snd_pcm_hw_params_set_rate_first </td>
<td>(</td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> * </td>
<td class="paramname"> <em>pcm</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">unsigned int * </td>
<td class="paramname"> <em>val</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int * </td>
<td class="paramname"> <em>dir</em></td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Restrict a configuration space to contain only its minimum rate. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>pcm</em> </td><td>PCM handle </td></tr>
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
<tr><td valign="top"></td><td valign="top"><em>val</em> </td><td>Returned minimum approximate rate </td></tr>
<tr><td valign="top"></td><td valign="top"><em>dir</em> </td><td>Sub unit direction </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>0 otherwise a negative error code</dd></dl>
<p>Actual exact value is <,=,> the approximate one following dir (-1, 0, 1) </p>
</div>
</div>
<a class="anchor" id="ga5d90a5204061482be45ac4e0d2b10e49"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_set_rate_last" ref="ga5d90a5204061482be45ac4e0d2b10e49" args="(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir)" -->
<div class="memitem">
<div class="memproto">
<table class="memname">
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<td class="memname">int snd_pcm_hw_params_set_rate_last </td>
<td>(</td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> * </td>
<td class="paramname"> <em>pcm</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">unsigned int * </td>
<td class="paramname"> <em>val</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int * </td>
<td class="paramname"> <em>dir</em></td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Restrict a configuration space to contain only its maximum rate. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>pcm</em> </td><td>PCM handle </td></tr>
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
<tr><td valign="top"></td><td valign="top"><em>val</em> </td><td>Returned maximum approximate rate </td></tr>
<tr><td valign="top"></td><td valign="top"><em>dir</em> </td><td>Sub unit direction </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>0 otherwise a negative error code</dd></dl>
<p>Actual exact value is <,=,> the approximate one following dir (-1, 0, 1) </p>
</div>
</div>
<a class="anchor" id="ga8701776750b18b2dad19a4115791c2f0"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_set_rate_max" ref="ga8701776750b18b2dad19a4115791c2f0" args="(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir)" -->
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<td class="memname">int snd_pcm_hw_params_set_rate_max </td>
<td>(</td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> * </td>
<td class="paramname"> <em>pcm</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">unsigned int * </td>
<td class="paramname"> <em>val</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int * </td>
<td class="paramname"> <em>dir</em></td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Restrict a configuration space with a maximum rate. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>pcm</em> </td><td>PCM handle </td></tr>
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
<tr><td valign="top"></td><td valign="top"><em>val</em> </td><td>approximate maximum rate (on return filled with actual maximum) </td></tr>
<tr><td valign="top"></td><td valign="top"><em>dir</em> </td><td>Sub unit direction (on return filled with actual direction) </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>0 otherwise a negative error code if configuration space would become empty</dd></dl>
<p>Wanted/actual exact maximum is <,=,> val following dir (-1,0,1) </p>
</div>
</div>
<a class="anchor" id="ga89374ae29dd924915ada6f26cd9a3292"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_set_rate_min" ref="ga89374ae29dd924915ada6f26cd9a3292" args="(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir)" -->
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<div class="memproto">
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<td class="memname">int snd_pcm_hw_params_set_rate_min </td>
<td>(</td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> * </td>
<td class="paramname"> <em>pcm</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">unsigned int * </td>
<td class="paramname"> <em>val</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int * </td>
<td class="paramname"> <em>dir</em></td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Restrict a configuration space with a minimum rate. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>pcm</em> </td><td>PCM handle </td></tr>
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
<tr><td valign="top"></td><td valign="top"><em>val</em> </td><td>approximate minimum rate (on return filled with actual minimum) </td></tr>
<tr><td valign="top"></td><td valign="top"><em>dir</em> </td><td>Sub unit direction (on return filled with actual direction) </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>0 otherwise a negative error code if configuration space would become empty</dd></dl>
<p>Wanted/actual exact minimum is <,=,> val following dir (-1,0,1) </p>
</div>
</div>
<a class="anchor" id="ga03795a2ee03be25a30185b26a1bc3e21"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_set_rate_minmax" ref="ga03795a2ee03be25a30185b26a1bc3e21" args="(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *min, int *mindir, unsigned int *max, int *maxdir)" -->
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<div class="memproto">
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<td class="memname">int snd_pcm_hw_params_set_rate_minmax </td>
<td>(</td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> * </td>
<td class="paramname"> <em>pcm</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">unsigned int * </td>
<td class="paramname"> <em>min</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int * </td>
<td class="paramname"> <em>mindir</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">unsigned int * </td>
<td class="paramname"> <em>max</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int * </td>
<td class="paramname"> <em>maxdir</em></td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Restrict a configuration space to have rates in a given range. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>pcm</em> </td><td>PCM handle </td></tr>
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
<tr><td valign="top"></td><td valign="top"><em>min</em> </td><td>approximate minimum rate (on return filled with actual minimum) </td></tr>
<tr><td valign="top"></td><td valign="top"><em>mindir</em> </td><td>Sub unit direction for minimum (on return filled with actual direction) </td></tr>
<tr><td valign="top"></td><td valign="top"><em>max</em> </td><td>approximate maximum rate (on return filled with actual maximum) </td></tr>
<tr><td valign="top"></td><td valign="top"><em>maxdir</em> </td><td>Sub unit direction for maximum (on return filled with actual direction) </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>0 otherwise a negative error code if configuration space would become empty</dd></dl>
<p>Wanted/actual exact min/max is <,=,> val following dir (-1,0,1) </p>
</div>
</div>
<a class="anchor" id="ga39124280d06ce63092a77e3f25ddd6ee"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_set_rate_near" ref="ga39124280d06ce63092a77e3f25ddd6ee" args="(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int *val, int *dir)" -->
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<td class="memname">int snd_pcm_hw_params_set_rate_near </td>
<td>(</td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> * </td>
<td class="paramname"> <em>pcm</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">unsigned int * </td>
<td class="paramname"> <em>val</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int * </td>
<td class="paramname"> <em>dir</em></td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Restrict a configuration space to have rate nearest to a target. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>pcm</em> </td><td>PCM handle </td></tr>
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
<tr><td valign="top"></td><td valign="top"><em>val</em> </td><td>approximate target rate / returned approximate set rate </td></tr>
<tr><td valign="top"></td><td valign="top"><em>dir</em> </td><td>Sub unit direction </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>0 otherwise a negative error code if configuration space is empty</dd></dl>
<p>target/chosen exact value is <,=,> val following dir (-1,0,1) </p>
<dl><dt><b>Examples: </b></dt><dd><a class="el" href="_2test_2latency_8c-example.html#a11">/test/latency.c</a>, and <a class="el" href="_2test_2pcm_8c-example.html#a21">/test/pcm.c</a>.</dd>
</dl>
</div>
</div>
<a class="anchor" id="ga82eecc0e27a94ce0caa195cc3765536c"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_set_rate_resample" ref="ga82eecc0e27a94ce0caa195cc3765536c" args="(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int val)" -->
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<td class="memname">int snd_pcm_hw_params_set_rate_resample </td>
<td>(</td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> * </td>
<td class="paramname"> <em>pcm</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">unsigned int </td>
<td class="paramname"> <em>val</em></td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Restrict a configuration space to contain only real hardware rates. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>pcm</em> </td><td>PCM handle </td></tr>
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
<tr><td valign="top"></td><td valign="top"><em>val</em> </td><td>0 = disable, 1 = enable (default) rate resampling </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>0 otherwise a negative error code </dd></dl>
<dl><dt><b>Examples: </b></dt><dd><a class="el" href="_2test_2latency_8c-example.html#a6">/test/latency.c</a>, and <a class="el" href="_2test_2pcm_8c-example.html#a17">/test/pcm.c</a>.</dd>
</dl>
</div>
</div>
<a class="anchor" id="ga08dfde7d1fc6a0a56609f3ec40ed26e2"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_set_subformat" ref="ga08dfde7d1fc6a0a56609f3ec40ed26e2" args="(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_subformat_t subformat)" -->
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<td class="memname">int snd_pcm_hw_params_set_subformat </td>
<td>(</td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> * </td>
<td class="paramname"> <em>pcm</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga1e5fe73a6bdf881e2f91921d5e5327c7">snd_pcm_subformat_t</a> </td>
<td class="paramname"> <em>subformat</em></td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Restrict a configuration space to contain only one subformat. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>pcm</em> </td><td>PCM handle </td></tr>
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
<tr><td valign="top"></td><td valign="top"><em>subformat</em> </td><td>subformat value </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>0 otherwise a negative error code if configuration space would become empty </dd></dl>
</div>
</div>
<a class="anchor" id="ga12b745bdf119127f2216d61a2bd28688"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_set_subformat_first" ref="ga12b745bdf119127f2216d61a2bd28688" args="(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_subformat_t *subformat)" -->
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">int snd_pcm_hw_params_set_subformat_first </td>
<td>(</td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> * </td>
<td class="paramname"> <em>pcm</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga1e5fe73a6bdf881e2f91921d5e5327c7">snd_pcm_subformat_t</a> * </td>
<td class="paramname"> <em>subformat</em></td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Restrict a configuration space to contain only its first subformat. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>pcm</em> </td><td>PCM handle </td></tr>
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
<tr><td valign="top"></td><td valign="top"><em>subformat</em> </td><td>Returned subformat </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>0 otherwise a negative error code </dd></dl>
</div>
</div>
<a class="anchor" id="gab1a02fff3ef394da274d2b2652df856d"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_set_subformat_last" ref="gab1a02fff3ef394da274d2b2652df856d" args="(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_subformat_t *subformat)" -->
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<td class="memname">int snd_pcm_hw_params_set_subformat_last </td>
<td>(</td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> * </td>
<td class="paramname"> <em>pcm</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga1e5fe73a6bdf881e2f91921d5e5327c7">snd_pcm_subformat_t</a> * </td>
<td class="paramname"> <em>subformat</em></td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Restrict a configuration space to contain only its last subformat. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>pcm</em> </td><td>PCM handle </td></tr>
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
<tr><td valign="top"></td><td valign="top"><em>subformat</em> </td><td>Returned subformat </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>0 otherwise a negative error code </dd></dl>
</div>
</div>
<a class="anchor" id="ga3ebc4625b258df82164dc9220a9f9117"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_set_subformat_mask" ref="ga3ebc4625b258df82164dc9220a9f9117" args="(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_subformat_mask_t *mask)" -->
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<td class="memname">int snd_pcm_hw_params_set_subformat_mask </td>
<td>(</td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> * </td>
<td class="paramname"> <em>pcm</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga891b054202089747199bc3348b9d9630">snd_pcm_subformat_mask_t</a> * </td>
<td class="paramname"> <em>mask</em></td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Restrict a configuration space to contain only a set of subformats. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>pcm</em> </td><td>PCM handle </td></tr>
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
<tr><td valign="top"></td><td valign="top"><em>mask</em> </td><td>Subformat mask </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>0 otherwise a negative error code </dd></dl>
</div>
</div>
<a class="anchor" id="ga092e6c110ad7b4e52855b9522e437ed9"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_sizeof" ref="ga092e6c110ad7b4e52855b9522e437ed9" args="(void)" -->
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<td class="memname">size_t snd_pcm_hw_params_sizeof </td>
<td>(</td>
<td class="paramtype">void </td>
<td class="paramname"></td>
<td> ) </td>
<td></td>
</tr>
</table>
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<p>get size of <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> </p>
<dl class="return"><dt><b>Returns:</b></dt><dd>size in bytes </dd></dl>
</div>
</div>
<a class="anchor" id="gab56553ff541e6e9ddae397f6faba840f"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_test_access" ref="gab56553ff541e6e9ddae397f6faba840f" args="(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_access_t _access)" -->
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<td class="memname">int snd_pcm_hw_params_test_access </td>
<td>(</td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> * </td>
<td class="paramname"> <em>pcm</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga661221ba5e8f1d6eaf4ab8e2da57cc1a">snd_pcm_access_t</a> </td>
<td class="paramname"> <em>access</em></td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Verify if an access type is available inside a configuration space for a PCM. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>pcm</em> </td><td>PCM handle </td></tr>
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
<tr><td valign="top"></td><td valign="top"><em>access</em> </td><td>access type </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>0 if available a negative error code otherwise </dd></dl>
</div>
</div>
<a class="anchor" id="ga3ce81a7fe9f677849881f1cfd3b5cb7e"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_test_buffer_size" ref="ga3ce81a7fe9f677849881f1cfd3b5cb7e" args="(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_uframes_t val)" -->
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<td class="memname">int snd_pcm_hw_params_test_buffer_size </td>
<td>(</td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> * </td>
<td class="paramname"> <em>pcm</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#gab01fcfe9b97382a8d3f2027c664b8b8a">snd_pcm_uframes_t</a> </td>
<td class="paramname"> <em>val</em></td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Verify if a buffer size is available inside a configuration space for a PCM. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>pcm</em> </td><td>PCM handle </td></tr>
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
<tr><td valign="top"></td><td valign="top"><em>val</em> </td><td>buffer size in frames </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>0 if available a negative error code otherwise</dd></dl>
<p>Wanted exact value is <,=,> val following dir (-1,0,1) </p>
</div>
</div>
<a class="anchor" id="ga9b6bf73e2a0b7f887f3d7d85a988eb7e"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_test_buffer_time" ref="ga9b6bf73e2a0b7f887f3d7d85a988eb7e" args="(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int val, int dir)" -->
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<td class="memname">int snd_pcm_hw_params_test_buffer_time </td>
<td>(</td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> * </td>
<td class="paramname"> <em>pcm</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em>, </td>
</tr>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">unsigned int </td>
<td class="paramname"> <em>val</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int </td>
<td class="paramname"> <em>dir</em></td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Verify if a buffer time is available inside a configuration space for a PCM. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>pcm</em> </td><td>PCM handle </td></tr>
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
<tr><td valign="top"></td><td valign="top"><em>val</em> </td><td>approximate buffer duration in us </td></tr>
<tr><td valign="top"></td><td valign="top"><em>dir</em> </td><td>Sub unit direction </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>0 if available a negative error code otherwise</dd></dl>
<p>Wanted exact value is <,=,> val following dir (-1,0,1) </p>
</div>
</div>
<a class="anchor" id="ga8fabc38d770ad922e5b4e0338e7fb242"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_test_channels" ref="ga8fabc38d770ad922e5b4e0338e7fb242" args="(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int val)" -->
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<td class="memname">int snd_pcm_hw_params_test_channels </td>
<td>(</td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> * </td>
<td class="paramname"> <em>pcm</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em>, </td>
</tr>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">unsigned int </td>
<td class="paramname"> <em>val</em></td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td></td>
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<div class="memdoc">
<p>Verify if a channels count is available inside a configuration space for a PCM. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>pcm</em> </td><td>PCM handle </td></tr>
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
<tr><td valign="top"></td><td valign="top"><em>val</em> </td><td>channels count </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>0 if available a negative error code otherwise </dd></dl>
</div>
</div>
<a class="anchor" id="ga64e1a5143bbd72c8f5cffca828d506ef"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_test_format" ref="ga64e1a5143bbd72c8f5cffca828d506ef" args="(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_format_t val)" -->
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<td class="memname">int snd_pcm_hw_params_test_format </td>
<td>(</td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> * </td>
<td class="paramname"> <em>pcm</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#gaa14b7f26877a812acbb39811364177f8">snd_pcm_format_t</a> </td>
<td class="paramname"> <em>format</em></td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td></td>
</tr>
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<div class="memdoc">
<p>Verify if a format is available inside a configuration space for a PCM. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>pcm</em> </td><td>PCM handle </td></tr>
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
<tr><td valign="top"></td><td valign="top"><em>format</em> </td><td>format </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>0 if available a negative error code otherwise </dd></dl>
</div>
</div>
<a class="anchor" id="gabc8712dab6cb135176de77f374d7ee17"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_test_period_size" ref="gabc8712dab6cb135176de77f374d7ee17" args="(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_uframes_t val, int dir)" -->
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<td class="memname">int snd_pcm_hw_params_test_period_size </td>
<td>(</td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> * </td>
<td class="paramname"> <em>pcm</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#gab01fcfe9b97382a8d3f2027c664b8b8a">snd_pcm_uframes_t</a> </td>
<td class="paramname"> <em>val</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int </td>
<td class="paramname"> <em>dir</em></td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td></td>
</tr>
</table>
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<div class="memdoc">
<p>Verify if a period size is available inside a configuration space for a PCM. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>pcm</em> </td><td>PCM handle </td></tr>
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
<tr><td valign="top"></td><td valign="top"><em>val</em> </td><td>approximate period size in frames </td></tr>
<tr><td valign="top"></td><td valign="top"><em>dir</em> </td><td>Sub unit direction </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>0 if available a negative error code otherwise</dd></dl>
<p>Wanted exact value is <,=,> val following dir (-1,0,1) </p>
</div>
</div>
<a class="anchor" id="gaf1f6452ad189be5c4e1ab3bd86f2f6d2"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_test_period_time" ref="gaf1f6452ad189be5c4e1ab3bd86f2f6d2" args="(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int val, int dir)" -->
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<td class="memname">int snd_pcm_hw_params_test_period_time </td>
<td>(</td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> * </td>
<td class="paramname"> <em>pcm</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">unsigned int </td>
<td class="paramname"> <em>val</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int </td>
<td class="paramname"> <em>dir</em></td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Verify if a period time is available inside a configuration space for a PCM. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>pcm</em> </td><td>PCM handle </td></tr>
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
<tr><td valign="top"></td><td valign="top"><em>val</em> </td><td>approximate period duration in us </td></tr>
<tr><td valign="top"></td><td valign="top"><em>dir</em> </td><td>Sub unit direction </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>0 if available a negative error code otherwise</dd></dl>
<p>Wanted exact value is <,=,> val following dir (-1,0,1) </p>
</div>
</div>
<a class="anchor" id="ga0de7350f433935a995d439fe38f55088"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_test_periods" ref="ga0de7350f433935a995d439fe38f55088" args="(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int val, int dir)" -->
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<td class="memname">int snd_pcm_hw_params_test_periods </td>
<td>(</td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> * </td>
<td class="paramname"> <em>pcm</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">unsigned int </td>
<td class="paramname"> <em>val</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int </td>
<td class="paramname"> <em>dir</em></td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Verify if a periods count is available inside a configuration space for a PCM. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>pcm</em> </td><td>PCM handle </td></tr>
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
<tr><td valign="top"></td><td valign="top"><em>val</em> </td><td>approximate periods per buffer </td></tr>
<tr><td valign="top"></td><td valign="top"><em>dir</em> </td><td>Sub unit direction </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>0 if available a negative error code otherwise</dd></dl>
<p>Wanted exact value is <,=,> val following dir (-1,0,1) </p>
</div>
</div>
<a class="anchor" id="ga5f09b37dd6f4c213029f8f39e00137a3"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_test_rate" ref="ga5f09b37dd6f4c213029f8f39e00137a3" args="(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, unsigned int val, int dir)" -->
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">int snd_pcm_hw_params_test_rate </td>
<td>(</td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> * </td>
<td class="paramname"> <em>pcm</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">unsigned int </td>
<td class="paramname"> <em>val</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">int </td>
<td class="paramname"> <em>dir</em></td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Verify if a rate is available inside a configuration space for a PCM. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>pcm</em> </td><td>PCM handle </td></tr>
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
<tr><td valign="top"></td><td valign="top"><em>val</em> </td><td>approximate rate </td></tr>
<tr><td valign="top"></td><td valign="top"><em>dir</em> </td><td>Sub unit direction </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>0 if available a negative error code otherwise</dd></dl>
<p>Wanted exact value is <,=,> val following dir (-1,0,1) </p>
</div>
</div>
<a class="anchor" id="gaf5062e723956551092db201f34c99495"></a><!-- doxytag: member="pcm.h::snd_pcm_hw_params_test_subformat" ref="gaf5062e723956551092db201f34c99495" args="(snd_pcm_t *pcm, snd_pcm_hw_params_t *params, snd_pcm_subformat_t subformat)" -->
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">int snd_pcm_hw_params_test_subformat </td>
<td>(</td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga919e634deecd855b6e2e15174e70d3ea">snd_pcm_t</a> * </td>
<td class="paramname"> <em>pcm</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> * </td>
<td class="paramname"> <em>params</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga1e5fe73a6bdf881e2f91921d5e5327c7">snd_pcm_subformat_t</a> </td>
<td class="paramname"> <em>subformat</em></td><td> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td><td></td>
</tr>
</table>
</div>
<div class="memdoc">
<p>Verify if a subformat is available inside a configuration space for a PCM. </p>
<dl><dt><b>Parameters:</b></dt><dd>
<table border="0" cellspacing="2" cellpadding="0">
<tr><td valign="top"></td><td valign="top"><em>pcm</em> </td><td>PCM handle </td></tr>
<tr><td valign="top"></td><td valign="top"><em>params</em> </td><td>Configuration space </td></tr>
<tr><td valign="top"></td><td valign="top"><em>subformat</em> </td><td>subformat value </td></tr>
</table>
</dd>
</dl>
<dl class="return"><dt><b>Returns:</b></dt><dd>0 if available a negative error code otherwise </dd></dl>
</div>
</div>
</div>
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