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<a href="#define-members">Macros</a> |
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<div class="title">Software Parameters<div class="ingroups"><a class="el" href="group___p_c_m.html">PCM Interface</a></div></div> </div>
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<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="define-members"></a>
Macros</h2></td></tr>
<tr class="memitem:ga8e564553bdc89948c918729e3cc7beb0"><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___s_w___params.html#ga8e564553bdc89948c918729e3cc7beb0">snd_pcm_sw_params_alloca</a>(<a class="el" href="seq__event_8h.html#add9af9569af79ec26dd741fb226b38ba">ptr</a>)</td></tr>
<tr class="memdesc:ga8e564553bdc89948c918729e3cc7beb0"><td class="mdescLeft"> </td><td class="mdescRight">allocate an invalid <a class="el" href="group___p_c_m.html#ga7e082d9ea701709270b0674a0be23b09">snd_pcm_sw_params_t</a> using standard alloca <a href="#ga8e564553bdc89948c918729e3cc7beb0">More...</a><br /></td></tr>
<tr class="separator:ga8e564553bdc89948c918729e3cc7beb0"><td class="memSeparator" colspan="2"> </td></tr>
</table><table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="func-members"></a>
Functions</h2></td></tr>
<tr class="memitem:ga7886ee5b3a48fb58ef8f70886472029a"><td class="memItemLeft" align="right" valign="top">size_t </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___s_w___params.html#ga7886ee5b3a48fb58ef8f70886472029a">snd_pcm_sw_params_sizeof</a> (void)</td></tr>
<tr class="memdesc:ga7886ee5b3a48fb58ef8f70886472029a"><td class="mdescLeft"> </td><td class="mdescRight">get size of <a class="el" href="group___p_c_m.html#ga7e082d9ea701709270b0674a0be23b09">snd_pcm_sw_params_t</a> <a href="#ga7886ee5b3a48fb58ef8f70886472029a">More...</a><br /></td></tr>
<tr class="separator:ga7886ee5b3a48fb58ef8f70886472029a"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ga23382b62e7fc0de94b279c9f5dd08e5e"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___s_w___params.html#ga23382b62e7fc0de94b279c9f5dd08e5e">snd_pcm_sw_params_malloc</a> (<a class="el" href="group___p_c_m.html#ga7e082d9ea701709270b0674a0be23b09">snd_pcm_sw_params_t</a> **<a class="el" href="seq__event_8h.html#add9af9569af79ec26dd741fb226b38ba">ptr</a>)</td></tr>
<tr class="memdesc:ga23382b62e7fc0de94b279c9f5dd08e5e"><td class="mdescLeft"> </td><td class="mdescRight">allocate an invalid <a class="el" href="group___p_c_m.html#ga7e082d9ea701709270b0674a0be23b09">snd_pcm_sw_params_t</a> using standard malloc <a href="#ga23382b62e7fc0de94b279c9f5dd08e5e">More...</a><br /></td></tr>
<tr class="separator:ga23382b62e7fc0de94b279c9f5dd08e5e"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ga35af2df23ec46619a82cb52e3733d47a"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___s_w___params.html#ga35af2df23ec46619a82cb52e3733d47a">snd_pcm_sw_params_free</a> (<a class="el" href="group___p_c_m.html#ga7e082d9ea701709270b0674a0be23b09">snd_pcm_sw_params_t</a> *obj)</td></tr>
<tr class="memdesc:ga35af2df23ec46619a82cb52e3733d47a"><td class="mdescLeft"> </td><td class="mdescRight">frees a previously allocated <a class="el" href="group___p_c_m.html#ga7e082d9ea701709270b0674a0be23b09">snd_pcm_sw_params_t</a> <a href="#ga35af2df23ec46619a82cb52e3733d47a">More...</a><br /></td></tr>
<tr class="separator:ga35af2df23ec46619a82cb52e3733d47a"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:gafe9ebe9ea669012af58b728d55fc295b"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___s_w___params.html#gafe9ebe9ea669012af58b728d55fc295b">snd_pcm_sw_params_copy</a> (<a class="el" href="group___p_c_m.html#ga7e082d9ea701709270b0674a0be23b09">snd_pcm_sw_params_t</a> *dst, const <a class="el" href="group___p_c_m.html#ga7e082d9ea701709270b0674a0be23b09">snd_pcm_sw_params_t</a> *src)</td></tr>
<tr class="memdesc:gafe9ebe9ea669012af58b728d55fc295b"><td class="mdescLeft"> </td><td class="mdescRight">copy one <a class="el" href="group___p_c_m.html#ga7e082d9ea701709270b0674a0be23b09">snd_pcm_sw_params_t</a> to another <a href="#gafe9ebe9ea669012af58b728d55fc295b">More...</a><br /></td></tr>
<tr class="separator:gafe9ebe9ea669012af58b728d55fc295b"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ga8bdb67600cf3c0705518b6c0a79c56fe"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___s_w___params.html#ga8bdb67600cf3c0705518b6c0a79c56fe">snd_pcm_sw_params_get_boundary</a> (const <a class="el" href="group___p_c_m.html#ga7e082d9ea701709270b0674a0be23b09">snd_pcm_sw_params_t</a> *params, <a class="el" href="group___p_c_m.html#gab01fcfe9b97382a8d3f2027c664b8b8a">snd_pcm_uframes_t</a> *val)</td></tr>
<tr class="memdesc:ga8bdb67600cf3c0705518b6c0a79c56fe"><td class="mdescLeft"> </td><td class="mdescRight">Get boundary for ring pointers from a software configuration container. <a href="#ga8bdb67600cf3c0705518b6c0a79c56fe">More...</a><br /></td></tr>
<tr class="separator:ga8bdb67600cf3c0705518b6c0a79c56fe"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:gac2fba23ba6ac1636785e27f0f5381a15"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___s_w___params.html#gac2fba23ba6ac1636785e27f0f5381a15">snd_pcm_sw_params_set_tstamp_mode</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#ga7e082d9ea701709270b0674a0be23b09">snd_pcm_sw_params_t</a> *params, <a class="el" href="group___p_c_m.html#ga695a9755880cf886c13d07938f92ea77">snd_pcm_tstamp_t</a> val)</td></tr>
<tr class="memdesc:gac2fba23ba6ac1636785e27f0f5381a15"><td class="mdescLeft"> </td><td class="mdescRight">Set timestamp mode inside a software configuration container. <a href="#gac2fba23ba6ac1636785e27f0f5381a15">More...</a><br /></td></tr>
<tr class="separator:gac2fba23ba6ac1636785e27f0f5381a15"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ga4caef7435210cd7f4878d55dadeed0f8"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___s_w___params.html#ga4caef7435210cd7f4878d55dadeed0f8">snd_pcm_sw_params_get_tstamp_mode</a> (const <a class="el" href="group___p_c_m.html#ga7e082d9ea701709270b0674a0be23b09">snd_pcm_sw_params_t</a> *params, <a class="el" href="group___p_c_m.html#ga695a9755880cf886c13d07938f92ea77">snd_pcm_tstamp_t</a> *val)</td></tr>
<tr class="memdesc:ga4caef7435210cd7f4878d55dadeed0f8"><td class="mdescLeft"> </td><td class="mdescRight">Get timestamp mode from a software configuration container. <a href="#ga4caef7435210cd7f4878d55dadeed0f8">More...</a><br /></td></tr>
<tr class="separator:ga4caef7435210cd7f4878d55dadeed0f8"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ga79b12cbbd309750156261e7f5a39167b"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___s_w___params.html#ga79b12cbbd309750156261e7f5a39167b">snd_pcm_sw_params_set_avail_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#ga7e082d9ea701709270b0674a0be23b09">snd_pcm_sw_params_t</a> *params, <a class="el" href="group___p_c_m.html#gab01fcfe9b97382a8d3f2027c664b8b8a">snd_pcm_uframes_t</a> val)</td></tr>
<tr class="memdesc:ga79b12cbbd309750156261e7f5a39167b"><td class="mdescLeft"> </td><td class="mdescRight">Set avail min inside a software configuration container. <a href="#ga79b12cbbd309750156261e7f5a39167b">More...</a><br /></td></tr>
<tr class="separator:ga79b12cbbd309750156261e7f5a39167b"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ga587ccbb0b025dc97d2af5db9516163d4"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___s_w___params.html#ga587ccbb0b025dc97d2af5db9516163d4">snd_pcm_sw_params_get_avail_min</a> (const <a class="el" href="group___p_c_m.html#ga7e082d9ea701709270b0674a0be23b09">snd_pcm_sw_params_t</a> *params, <a class="el" href="group___p_c_m.html#gab01fcfe9b97382a8d3f2027c664b8b8a">snd_pcm_uframes_t</a> *val)</td></tr>
<tr class="memdesc:ga587ccbb0b025dc97d2af5db9516163d4"><td class="mdescLeft"> </td><td class="mdescRight">Get avail min from a software configuration container. <a href="#ga587ccbb0b025dc97d2af5db9516163d4">More...</a><br /></td></tr>
<tr class="separator:ga587ccbb0b025dc97d2af5db9516163d4"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:gaf62ce50d6242b4f4dc9d6534a97e5c09"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___s_w___params.html#gaf62ce50d6242b4f4dc9d6534a97e5c09">snd_pcm_sw_params_set_period_event</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#ga7e082d9ea701709270b0674a0be23b09">snd_pcm_sw_params_t</a> *params, int val)</td></tr>
<tr class="memdesc:gaf62ce50d6242b4f4dc9d6534a97e5c09"><td class="mdescLeft"> </td><td class="mdescRight">Set period event inside a software configuration container. <a href="#gaf62ce50d6242b4f4dc9d6534a97e5c09">More...</a><br /></td></tr>
<tr class="separator:gaf62ce50d6242b4f4dc9d6534a97e5c09"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ga0458a8fe480a7887726748052bd77211"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___s_w___params.html#ga0458a8fe480a7887726748052bd77211">snd_pcm_sw_params_get_period_event</a> (const <a class="el" href="group___p_c_m.html#ga7e082d9ea701709270b0674a0be23b09">snd_pcm_sw_params_t</a> *params, int *val)</td></tr>
<tr class="memdesc:ga0458a8fe480a7887726748052bd77211"><td class="mdescLeft"> </td><td class="mdescRight">Get period event from a software configuration container. <a href="#ga0458a8fe480a7887726748052bd77211">More...</a><br /></td></tr>
<tr class="separator:ga0458a8fe480a7887726748052bd77211"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ga1d338f1f7e33b7a6d0f9a8f61f87f057"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___s_w___params.html#ga1d338f1f7e33b7a6d0f9a8f61f87f057">snd_pcm_sw_params_set_start_threshold</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#ga7e082d9ea701709270b0674a0be23b09">snd_pcm_sw_params_t</a> *params, <a class="el" href="group___p_c_m.html#gab01fcfe9b97382a8d3f2027c664b8b8a">snd_pcm_uframes_t</a> val)</td></tr>
<tr class="memdesc:ga1d338f1f7e33b7a6d0f9a8f61f87f057"><td class="mdescLeft"> </td><td class="mdescRight">Set start threshold inside a software configuration container. <a href="#ga1d338f1f7e33b7a6d0f9a8f61f87f057">More...</a><br /></td></tr>
<tr class="separator:ga1d338f1f7e33b7a6d0f9a8f61f87f057"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ga1ee7116c68bdea12606aab57db86a1d1"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___s_w___params.html#ga1ee7116c68bdea12606aab57db86a1d1">snd_pcm_sw_params_get_start_threshold</a> (const <a class="el" href="group___p_c_m.html#ga7e082d9ea701709270b0674a0be23b09">snd_pcm_sw_params_t</a> *paramsm, <a class="el" href="group___p_c_m.html#gab01fcfe9b97382a8d3f2027c664b8b8a">snd_pcm_uframes_t</a> *val)</td></tr>
<tr class="memdesc:ga1ee7116c68bdea12606aab57db86a1d1"><td class="mdescLeft"> </td><td class="mdescRight">Get start threshold from a software configuration container. <a href="#ga1ee7116c68bdea12606aab57db86a1d1">More...</a><br /></td></tr>
<tr class="separator:ga1ee7116c68bdea12606aab57db86a1d1"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ga6a41bf533207d56fdb1ff10aeeac28e4"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___s_w___params.html#ga6a41bf533207d56fdb1ff10aeeac28e4">snd_pcm_sw_params_set_stop_threshold</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#ga7e082d9ea701709270b0674a0be23b09">snd_pcm_sw_params_t</a> *params, <a class="el" href="group___p_c_m.html#gab01fcfe9b97382a8d3f2027c664b8b8a">snd_pcm_uframes_t</a> val)</td></tr>
<tr class="memdesc:ga6a41bf533207d56fdb1ff10aeeac28e4"><td class="mdescLeft"> </td><td class="mdescRight">Set stop threshold inside a software configuration container. <a href="#ga6a41bf533207d56fdb1ff10aeeac28e4">More...</a><br /></td></tr>
<tr class="separator:ga6a41bf533207d56fdb1ff10aeeac28e4"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ga8a55577d7f3d8e4ce63a710921199c66"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___s_w___params.html#ga8a55577d7f3d8e4ce63a710921199c66">snd_pcm_sw_params_get_stop_threshold</a> (const <a class="el" href="group___p_c_m.html#ga7e082d9ea701709270b0674a0be23b09">snd_pcm_sw_params_t</a> *params, <a class="el" href="group___p_c_m.html#gab01fcfe9b97382a8d3f2027c664b8b8a">snd_pcm_uframes_t</a> *val)</td></tr>
<tr class="memdesc:ga8a55577d7f3d8e4ce63a710921199c66"><td class="mdescLeft"> </td><td class="mdescRight">Get stop threshold from a software configuration container. <a href="#ga8a55577d7f3d8e4ce63a710921199c66">More...</a><br /></td></tr>
<tr class="separator:ga8a55577d7f3d8e4ce63a710921199c66"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ga5a0158bf962f20bd9fd5ed2c52dd682b"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___s_w___params.html#ga5a0158bf962f20bd9fd5ed2c52dd682b">snd_pcm_sw_params_set_silence_threshold</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#ga7e082d9ea701709270b0674a0be23b09">snd_pcm_sw_params_t</a> *params, <a class="el" href="group___p_c_m.html#gab01fcfe9b97382a8d3f2027c664b8b8a">snd_pcm_uframes_t</a> val)</td></tr>
<tr class="memdesc:ga5a0158bf962f20bd9fd5ed2c52dd682b"><td class="mdescLeft"> </td><td class="mdescRight">Set silence threshold inside a software configuration container. <a href="#ga5a0158bf962f20bd9fd5ed2c52dd682b">More...</a><br /></td></tr>
<tr class="separator:ga5a0158bf962f20bd9fd5ed2c52dd682b"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ga896ece8b418f6d6e92d2df5a4b59c3a2"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___s_w___params.html#ga896ece8b418f6d6e92d2df5a4b59c3a2">snd_pcm_sw_params_get_silence_threshold</a> (const <a class="el" href="group___p_c_m.html#ga7e082d9ea701709270b0674a0be23b09">snd_pcm_sw_params_t</a> *params, <a class="el" href="group___p_c_m.html#gab01fcfe9b97382a8d3f2027c664b8b8a">snd_pcm_uframes_t</a> *val)</td></tr>
<tr class="memdesc:ga896ece8b418f6d6e92d2df5a4b59c3a2"><td class="mdescLeft"> </td><td class="mdescRight">Get silence threshold from a software configuration container. <a href="#ga896ece8b418f6d6e92d2df5a4b59c3a2">More...</a><br /></td></tr>
<tr class="separator:ga896ece8b418f6d6e92d2df5a4b59c3a2"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:gaeb4a335a16981b5ea3fa671946fbdca3"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___s_w___params.html#gaeb4a335a16981b5ea3fa671946fbdca3">snd_pcm_sw_params_set_silence_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#ga7e082d9ea701709270b0674a0be23b09">snd_pcm_sw_params_t</a> *params, <a class="el" href="group___p_c_m.html#gab01fcfe9b97382a8d3f2027c664b8b8a">snd_pcm_uframes_t</a> val)</td></tr>
<tr class="memdesc:gaeb4a335a16981b5ea3fa671946fbdca3"><td class="mdescLeft"> </td><td class="mdescRight">Set silence size inside a software configuration container. <a href="#gaeb4a335a16981b5ea3fa671946fbdca3">More...</a><br /></td></tr>
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<tr class="memitem:ga6a197020c09c8a20e697d12e9fac3e11"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="group___p_c_m___s_w___params.html#ga6a197020c09c8a20e697d12e9fac3e11">snd_pcm_sw_params_get_silence_size</a> (const <a class="el" href="group___p_c_m.html#ga7e082d9ea701709270b0674a0be23b09">snd_pcm_sw_params_t</a> *params, <a class="el" href="group___p_c_m.html#gab01fcfe9b97382a8d3f2027c664b8b8a">snd_pcm_uframes_t</a> *val)</td></tr>
<tr class="memdesc:ga6a197020c09c8a20e697d12e9fac3e11"><td class="mdescLeft"> </td><td class="mdescRight">Get silence size from a software configuration container. <a href="#ga6a197020c09c8a20e697d12e9fac3e11">More...</a><br /></td></tr>
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</table>
<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<p>See the <a class="el" href="pcm.html">PCM (digital audio) interface</a> page for more details. </p>
<h2 class="groupheader">Macro Definition Documentation</h2>
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<td class="memname">#define snd_pcm_sw_params_alloca</td>
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<td class="paramtype"> </td>
<td class="paramname"><a class="el" href="seq__event_8h.html#add9af9569af79ec26dd741fb226b38ba">ptr</a></td><td>)</td>
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<p>allocate an invalid <a class="el" href="group___p_c_m.html#ga7e082d9ea701709270b0674a0be23b09">snd_pcm_sw_params_t</a> using standard alloca </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">ptr</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#a19">/test/latency.c</a>, and <a class="el" href="_2test_2pcm_8c-example.html#a53">/test/pcm.c</a>.</dd>
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<h2 class="groupheader">Function Documentation</h2>
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<td class="memname">void snd_pcm_sw_params_copy </td>
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<td class="paramtype"><a class="el" href="group___p_c_m.html#ga7e082d9ea701709270b0674a0be23b09">snd_pcm_sw_params_t</a> * </td>
<td class="paramname"><em>dst</em>, </td>
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<td class="paramtype">const <a class="el" href="group___p_c_m.html#ga7e082d9ea701709270b0674a0be23b09">snd_pcm_sw_params_t</a> * </td>
<td class="paramname"><em>src</em> </td>
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<p>copy one <a class="el" href="group___p_c_m.html#ga7e082d9ea701709270b0674a0be23b09">snd_pcm_sw_params_t</a> to another </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">dst</td><td>pointer to destination </td></tr>
<tr><td class="paramname">src</td><td>pointer to source </td></tr>
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<td class="memname">void snd_pcm_sw_params_free </td>
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<td class="paramtype"><a class="el" href="group___p_c_m.html#ga7e082d9ea701709270b0674a0be23b09">snd_pcm_sw_params_t</a> * </td>
<td class="paramname"><em>obj</em></td><td>)</td>
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<p>frees a previously allocated <a class="el" href="group___p_c_m.html#ga7e082d9ea701709270b0674a0be23b09">snd_pcm_sw_params_t</a> </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">obj</td><td>pointer to object to free </td></tr>
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</dd>
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<td class="memname">int snd_pcm_sw_params_get_avail_min </td>
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<td class="paramtype">const <a class="el" href="group___p_c_m.html#ga7e082d9ea701709270b0674a0be23b09">snd_pcm_sw_params_t</a> * </td>
<td class="paramname"><em>params</em>, </td>
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<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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<p>Get avail min from a software configuration container. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">params</td><td>Software configuration container </td></tr>
<tr><td class="paramname">val</td><td>returned minimum available frames to consider PCM ready </td></tr>
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<dl class="section return"><dt>Returns</dt><dd>0 otherwise a negative error code </dd></dl>
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<td class="memname">int snd_pcm_sw_params_get_boundary </td>
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<td class="paramtype">const <a class="el" href="group___p_c_m.html#ga7e082d9ea701709270b0674a0be23b09">snd_pcm_sw_params_t</a> * </td>
<td class="paramname"><em>params</em>, </td>
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<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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<p>Get boundary for ring pointers from a software configuration container. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">params</td><td>Software configuration container </td></tr>
<tr><td class="paramname">val</td><td>Returned boundary in frames </td></tr>
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<dl class="section return"><dt>Returns</dt><dd>0 otherwise a negative error code </dd></dl>
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<td class="memname">int snd_pcm_sw_params_get_period_event </td>
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<td class="paramtype">const <a class="el" href="group___p_c_m.html#ga7e082d9ea701709270b0674a0be23b09">snd_pcm_sw_params_t</a> * </td>
<td class="paramname"><em>params</em>, </td>
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<td class="paramtype">int * </td>
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<p>Get period event from a software configuration container. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">params</td><td>Software configuration container </td></tr>
<tr><td class="paramname">val</td><td>returned period event state </td></tr>
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<dl class="section return"><dt>Returns</dt><dd>0 otherwise a negative error code </dd></dl>
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<td class="memname">int snd_pcm_sw_params_get_silence_size </td>
<td>(</td>
<td class="paramtype">const <a class="el" href="group___p_c_m.html#ga7e082d9ea701709270b0674a0be23b09">snd_pcm_sw_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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<p>Get silence size from a software configuration container. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">params</td><td>Software configuration container </td></tr>
<tr><td class="paramname">val</td><td>Returned silence size in frames (0 for disabled) </td></tr>
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<dl class="section return"><dt>Returns</dt><dd>0 otherwise a negative error code</dd></dl>
<p>A portion of playback buffer is overwritten with silence when playback underrun is nearer than silence threshold (see <a class="el" href="group___p_c_m___s_w___params.html#ga5a0158bf962f20bd9fd5ed2c52dd682b" title="Set silence threshold inside a software configuration container. ">snd_pcm_sw_params_set_silence_threshold</a>) </p>
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<td class="memname">int snd_pcm_sw_params_get_silence_threshold </td>
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<td class="paramtype">const <a class="el" href="group___p_c_m.html#ga7e082d9ea701709270b0674a0be23b09">snd_pcm_sw_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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<p>Get silence threshold from a software configuration container. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">params</td><td>Software configuration container </td></tr>
<tr><td class="paramname">val</td><td>Returned silence threshold in frames </td></tr>
</table>
</dd>
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<dl class="section return"><dt>Returns</dt><dd>0 otherwise a negative error value</dd></dl>
<p>A portion of playback buffer is overwritten with silence (see <a class="el" href="group___p_c_m___s_w___params.html#gaeb4a335a16981b5ea3fa671946fbdca3" title="Set silence size inside a software configuration container. ">snd_pcm_sw_params_set_silence_size</a>) when playback underrun is nearer than silence threshold. </p>
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<td class="memname">int snd_pcm_sw_params_get_start_threshold </td>
<td>(</td>
<td class="paramtype">const <a class="el" href="group___p_c_m.html#ga7e082d9ea701709270b0674a0be23b09">snd_pcm_sw_params_t</a> * </td>
<td class="paramname"><em>params</em>, </td>
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<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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<p>Get start threshold from a software configuration container. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">params</td><td>Software configuration container </td></tr>
<tr><td class="paramname">val</td><td>Returned start threshold in frames </td></tr>
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<dl class="section return"><dt>Returns</dt><dd>0 otherwise a negative error code</dd></dl>
<p>PCM is automatically started when playback frames available to PCM are >= threshold or when requested capture frames are >= threshold </p>
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<td class="memname">int snd_pcm_sw_params_get_stop_threshold </td>
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<td class="paramtype">const <a class="el" href="group___p_c_m.html#ga7e082d9ea701709270b0674a0be23b09">snd_pcm_sw_params_t</a> * </td>
<td class="paramname"><em>params</em>, </td>
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<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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<p>Get stop threshold from a software configuration container. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">params</td><td>Software configuration container </td></tr>
<tr><td class="paramname">val</td><td>Returned stop threshold in frames </td></tr>
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</dd>
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<dl class="section return"><dt>Returns</dt><dd>0 otherwise a negative error code</dd></dl>
<p>PCM is automatically stopped in <a class="el" href="group___p_c_m.html#gga61ac499cb3701ce536d4d83725908860ab63b5b90201110cd586b686355fd5d83">SND_PCM_STATE_XRUN</a> state when available frames is >= threshold. If the stop threshold is equal to boundary (also software parameter - sw_param) then automatic stop will be disabled (thus device will do the endless loop in the ring buffer). </p>
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<td class="memname">int snd_pcm_sw_params_get_tstamp_mode </td>
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<td class="paramtype">const <a class="el" href="group___p_c_m.html#ga7e082d9ea701709270b0674a0be23b09">snd_pcm_sw_params_t</a> * </td>
<td class="paramname"><em>params</em>, </td>
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<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga695a9755880cf886c13d07938f92ea77">snd_pcm_tstamp_t</a> * </td>
<td class="paramname"><em>val</em> </td>
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<p>Get timestamp mode from a software configuration container. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">params</td><td>Software configuration container </td></tr>
<tr><td class="paramname">val</td><td>Returned timestamp </td></tr>
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</dd>
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<dl class="section return"><dt>Returns</dt><dd>0 otherwise a negative error code </dd></dl>
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<td class="memname">int snd_pcm_sw_params_malloc </td>
<td>(</td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga7e082d9ea701709270b0674a0be23b09">snd_pcm_sw_params_t</a> ** </td>
<td class="paramname"><em>ptr</em></td><td>)</td>
<td></td>
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<p>allocate an invalid <a class="el" href="group___p_c_m.html#ga7e082d9ea701709270b0674a0be23b09">snd_pcm_sw_params_t</a> using standard malloc </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">ptr</td><td>returned pointer </td></tr>
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</dd>
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<dl class="section return"><dt>Returns</dt><dd>0 on success otherwise negative error code </dd></dl>
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<td class="memname">int snd_pcm_sw_params_set_avail_min </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="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga7e082d9ea701709270b0674a0be23b09">snd_pcm_sw_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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<p>Set avail min inside a software configuration container. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">pcm</td><td>PCM handle </td></tr>
<tr><td class="paramname">params</td><td>Software configuration container </td></tr>
<tr><td class="paramname">val</td><td>Minimum avail frames to consider PCM ready </td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>0 otherwise a negative error code</dd></dl>
<p>Note: This is similar to setting an OSS wakeup point. The valid values for 'val' are determined by the specific hardware. Most PC sound cards can only accept power of 2 frame counts (i.e. 512, 1024, 2048). You cannot use this as a high resolution timer - it is limited to how often the sound card hardware raises an interrupt. </p>
<dl><dt><b>Examples: </b></dt><dd><a class="el" href="_2test_2latency_8c-example.html#a16">/test/latency.c</a>, and <a class="el" href="_2test_2pcm_8c-example.html#a24">/test/pcm.c</a>.</dd>
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<td class="memname">int snd_pcm_sw_params_set_period_event </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#ga7e082d9ea701709270b0674a0be23b09">snd_pcm_sw_params_t</a> * </td>
<td class="paramname"><em>params</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">int </td>
<td class="paramname"><em>val</em> </td>
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<p>Set period event inside a software configuration container. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">pcm</td><td>PCM handle </td></tr>
<tr><td class="paramname">params</td><td>Software configuration container </td></tr>
<tr><td class="paramname">val</td><td>0 = disable period event, 1 = enable period event </td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>0 otherwise a negative error code</dd></dl>
<p>An poll (select) wakeup event is raised if enabled. </p>
<dl><dt><b>Examples: </b></dt><dd><a class="el" href="_2test_2pcm_8c-example.html#a25">/test/pcm.c</a>.</dd>
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<td class="memname">int snd_pcm_sw_params_set_silence_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>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="group___p_c_m.html#ga7e082d9ea701709270b0674a0be23b09">snd_pcm_sw_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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<p>Set silence size inside a software configuration container. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">pcm</td><td>PCM handle </td></tr>
<tr><td class="paramname">params</td><td>Software configuration container </td></tr>
<tr><td class="paramname">val</td><td>Silence size in frames (0 for disabled) </td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>0 otherwise a negative error code</dd></dl>
<p>A portion of playback buffer is overwritten with silence when playback underrun is nearer than silence threshold (see <a class="el" href="group___p_c_m___s_w___params.html#ga5a0158bf962f20bd9fd5ed2c52dd682b" title="Set silence threshold inside a software configuration container. ">snd_pcm_sw_params_set_silence_threshold</a>)</p>
<p>The special case is when silence size value is equal or greater than boundary. The unused portion of the ring buffer (initial written samples are untouched) is filled with silence at start. Later, only just processed sample area is filled with silence. Note: silence_threshold must be set to zero. </p>
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<td class="memname">int snd_pcm_sw_params_set_silence_threshold </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#ga7e082d9ea701709270b0674a0be23b09">snd_pcm_sw_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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<p>Set silence threshold inside a software configuration container. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">pcm</td><td>PCM handle </td></tr>
<tr><td class="paramname">params</td><td>Software configuration container </td></tr>
<tr><td class="paramname">val</td><td>Silence threshold in frames </td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>0 otherwise a negative error code</dd></dl>
<p>A portion of playback buffer is overwritten with silence (see <a class="el" href="group___p_c_m___s_w___params.html#gaeb4a335a16981b5ea3fa671946fbdca3" title="Set silence size inside a software configuration container. ">snd_pcm_sw_params_set_silence_size</a>) when playback underrun is nearer than silence threshold. </p>
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<td class="memname">int snd_pcm_sw_params_set_start_threshold </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#ga7e082d9ea701709270b0674a0be23b09">snd_pcm_sw_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>
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<td></td>
<td>)</td>
<td></td><td></td>
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<p>Set start threshold inside a software configuration container. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">pcm</td><td>PCM handle </td></tr>
<tr><td class="paramname">params</td><td>Software configuration container </td></tr>
<tr><td class="paramname">val</td><td>Start threshold in frames </td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>0 otherwise a negative error code</dd></dl>
<p>PCM is automatically started when playback frames available to PCM are >= threshold or when requested capture frames are >= threshold </p>
<dl><dt><b>Examples: </b></dt><dd><a class="el" href="_2test_2latency_8c-example.html#a14">/test/latency.c</a>, and <a class="el" href="_2test_2pcm_8c-example.html#a23">/test/pcm.c</a>.</dd>
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<td class="memname">int snd_pcm_sw_params_set_stop_threshold </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#ga7e082d9ea701709270b0674a0be23b09">snd_pcm_sw_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></td>
<td>)</td>
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<p>Set stop threshold inside a software configuration container. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">pcm</td><td>PCM handle </td></tr>
<tr><td class="paramname">params</td><td>Software configuration container </td></tr>
<tr><td class="paramname">val</td><td>Stop threshold in frames </td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>0 otherwise a negative error code</dd></dl>
<p>PCM is automatically stopped in <a class="el" href="group___p_c_m.html#gga61ac499cb3701ce536d4d83725908860ab63b5b90201110cd586b686355fd5d83">SND_PCM_STATE_XRUN</a> state when available frames is >= threshold. If the stop threshold is equal to boundary (also software parameter - sw_param) then automatic stop will be disabled (thus device will do the endless loop in the ring buffer). </p>
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<td class="memname">int snd_pcm_sw_params_set_tstamp_mode </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#ga7e082d9ea701709270b0674a0be23b09">snd_pcm_sw_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#ga695a9755880cf886c13d07938f92ea77">snd_pcm_tstamp_t</a> </td>
<td class="paramname"><em>val</em> </td>
</tr>
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<td></td>
<td>)</td>
<td></td><td></td>
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<p>Set timestamp mode inside a software configuration container. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">pcm</td><td>PCM handle </td></tr>
<tr><td class="paramname">params</td><td>Software configuration container </td></tr>
<tr><td class="paramname">val</td><td>Timestamp mode </td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>0 otherwise a negative error code </dd></dl>
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<td class="memname">size_t snd_pcm_sw_params_sizeof </td>
<td>(</td>
<td class="paramtype">void </td>
<td class="paramname"></td><td>)</td>
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<p>get size of <a class="el" href="group___p_c_m.html#ga7e082d9ea701709270b0674a0be23b09">snd_pcm_sw_params_t</a> </p>
<dl class="section return"><dt>Returns</dt><dd>size in bytes </dd></dl>
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