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<title>ALSA project - the C library reference: snd_ctl_ext_callback_t Struct Reference</title>
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<h1>snd_ctl_ext_callback_t Struct Reference<br/>
<small>
[<a class="el" href="group___ctl_plugin___s_d_k.html">External Control Plugin SDK</a>]</small>
</h1><!-- doxytag: class="snd_ctl_ext_callback" --><table border="0" cellpadding="0" cellspacing="0">
<tr><td colspan="2"><h2>Data Fields</h2></td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void(* </td><td class="memItemRight" valign="bottom"><a class="el" href="structsnd__ctl__ext__callback.html#a44779934bb91de1557271a53b71c94a8">close</a> )(snd_ctl_ext_t *ext)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int(* </td><td class="memItemRight" valign="bottom"><a class="el" href="structsnd__ctl__ext__callback.html#acc5ea4f6d7769e91970f545d6bdfa336">elem_count</a> )(snd_ctl_ext_t *ext)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int(* </td><td class="memItemRight" valign="bottom"><a class="el" href="structsnd__ctl__ext__callback.html#a6704251e9cc62fcfec4e630a4df1bac9">elem_list</a> )(snd_ctl_ext_t *ext, unsigned int offset, <a class="el" href="group___control.html#gad6c3746f1925bfec6a4fd0e913430e55">snd_ctl_elem_id_t</a> *id)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top"><a class="el" href="group___ctl_plugin___s_d_k.html#gac73a66a3973afb51c4e585177647c693">snd_ctl_ext_key_t</a>(* </td><td class="memItemRight" valign="bottom"><a class="el" href="structsnd__ctl__ext__callback.html#a1f352e46ab46f1f8eda7194de6dde912">find_elem</a> )(snd_ctl_ext_t *ext, const <a class="el" href="group___control.html#gad6c3746f1925bfec6a4fd0e913430e55">snd_ctl_elem_id_t</a> *id)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void(* </td><td class="memItemRight" valign="bottom"><a class="el" href="structsnd__ctl__ext__callback.html#a06d74b7ada2f5aaf318353aaf7ea0a7a">free_key</a> )(snd_ctl_ext_t *ext, <a class="el" href="group___ctl_plugin___s_d_k.html#gac73a66a3973afb51c4e585177647c693">snd_ctl_ext_key_t</a> key)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int(* </td><td class="memItemRight" valign="bottom"><a class="el" href="structsnd__ctl__ext__callback.html#a9e9b8e2c2527c23130c92a3f2b5aa616">get_attribute</a> )(snd_ctl_ext_t *ext, <a class="el" href="group___ctl_plugin___s_d_k.html#gac73a66a3973afb51c4e585177647c693">snd_ctl_ext_key_t</a> key, int *type, unsigned int *acc, unsigned int *count)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int(* </td><td class="memItemRight" valign="bottom"><a class="el" href="structsnd__ctl__ext__callback.html#af71b075cd0326c4998d1708b25f7ab0f">get_integer_info</a> )(snd_ctl_ext_t *ext, <a class="el" href="group___ctl_plugin___s_d_k.html#gac73a66a3973afb51c4e585177647c693">snd_ctl_ext_key_t</a> key, long *imin, long *imax, long *istep)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int(* </td><td class="memItemRight" valign="bottom"><a class="el" href="structsnd__ctl__ext__callback.html#a12774a89d9d66b1fec865dddf5dbfd13">get_integer64_info</a> )(snd_ctl_ext_t *ext, <a class="el" href="group___ctl_plugin___s_d_k.html#gac73a66a3973afb51c4e585177647c693">snd_ctl_ext_key_t</a> key, int64_t *imin, int64_t *imax, int64_t *istep)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int(* </td><td class="memItemRight" valign="bottom"><a class="el" href="structsnd__ctl__ext__callback.html#a4c1395e41c0da1740226eacd658f5262">get_enumerated_info</a> )(snd_ctl_ext_t *ext, <a class="el" href="group___ctl_plugin___s_d_k.html#gac73a66a3973afb51c4e585177647c693">snd_ctl_ext_key_t</a> key, unsigned int *items)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int(* </td><td class="memItemRight" valign="bottom"><a class="el" href="structsnd__ctl__ext__callback.html#abd68965e4723e436d140561fdeff280d">get_enumerated_name</a> )(snd_ctl_ext_t *ext, <a class="el" href="group___ctl_plugin___s_d_k.html#gac73a66a3973afb51c4e585177647c693">snd_ctl_ext_key_t</a> key, unsigned int item, char *name, size_t name_max_len)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int(* </td><td class="memItemRight" valign="bottom"><a class="el" href="structsnd__ctl__ext__callback.html#aff147938f9e1751721a8ae9fb15beff5">read_integer</a> )(snd_ctl_ext_t *ext, <a class="el" href="group___ctl_plugin___s_d_k.html#gac73a66a3973afb51c4e585177647c693">snd_ctl_ext_key_t</a> key, long *value)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int(* </td><td class="memItemRight" valign="bottom"><a class="el" href="structsnd__ctl__ext__callback.html#a795645eea841d655219210ff9a16d935">read_integer64</a> )(snd_ctl_ext_t *ext, <a class="el" href="group___ctl_plugin___s_d_k.html#gac73a66a3973afb51c4e585177647c693">snd_ctl_ext_key_t</a> key, int64_t *value)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int(* </td><td class="memItemRight" valign="bottom"><a class="el" href="structsnd__ctl__ext__callback.html#ae4cbfbd79dbf86f472d70170b7e20905">read_enumerated</a> )(snd_ctl_ext_t *ext, <a class="el" href="group___ctl_plugin___s_d_k.html#gac73a66a3973afb51c4e585177647c693">snd_ctl_ext_key_t</a> key, unsigned int *items)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int(* </td><td class="memItemRight" valign="bottom"><a class="el" href="structsnd__ctl__ext__callback.html#a9b379d7ac330bc8f7d7e11ed04f22eb3">read_bytes</a> )(snd_ctl_ext_t *ext, <a class="el" href="group___ctl_plugin___s_d_k.html#gac73a66a3973afb51c4e585177647c693">snd_ctl_ext_key_t</a> key, unsigned char *data, size_t max_bytes)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int(* </td><td class="memItemRight" valign="bottom"><a class="el" href="structsnd__ctl__ext__callback.html#a1ed9e47299589f4c63fa326ac44ae9a6">read_iec958</a> )(snd_ctl_ext_t *ext, <a class="el" href="group___ctl_plugin___s_d_k.html#gac73a66a3973afb51c4e585177647c693">snd_ctl_ext_key_t</a> key, <a class="el" href="structsnd__aes__iec958__t.html">snd_aes_iec958_t</a> *iec958)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int(* </td><td class="memItemRight" valign="bottom"><a class="el" href="structsnd__ctl__ext__callback.html#aaf9722f3dc469ec0f02995b4706fc6e7">write_integer</a> )(snd_ctl_ext_t *ext, <a class="el" href="group___ctl_plugin___s_d_k.html#gac73a66a3973afb51c4e585177647c693">snd_ctl_ext_key_t</a> key, long *value)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int(* </td><td class="memItemRight" valign="bottom"><a class="el" href="structsnd__ctl__ext__callback.html#a720034336e55e098a345df5170b0a0a0">write_integer64</a> )(snd_ctl_ext_t *ext, <a class="el" href="group___ctl_plugin___s_d_k.html#gac73a66a3973afb51c4e585177647c693">snd_ctl_ext_key_t</a> key, int64_t *value)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int(* </td><td class="memItemRight" valign="bottom"><a class="el" href="structsnd__ctl__ext__callback.html#acdf226a341ddcc6dd38ae06f1b95f3a5">write_enumerated</a> )(snd_ctl_ext_t *ext, <a class="el" href="group___ctl_plugin___s_d_k.html#gac73a66a3973afb51c4e585177647c693">snd_ctl_ext_key_t</a> key, unsigned int *items)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int(* </td><td class="memItemRight" valign="bottom"><a class="el" href="structsnd__ctl__ext__callback.html#a6e220e2b56735114fe86e3837f3a4470">write_bytes</a> )(snd_ctl_ext_t *ext, <a class="el" href="group___ctl_plugin___s_d_k.html#gac73a66a3973afb51c4e585177647c693">snd_ctl_ext_key_t</a> key, unsigned char *data, size_t max_bytes)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int(* </td><td class="memItemRight" valign="bottom"><a class="el" href="structsnd__ctl__ext__callback.html#a07f9d3f151f08f32914e782db9e1b4ea">write_iec958</a> )(snd_ctl_ext_t *ext, <a class="el" href="group___ctl_plugin___s_d_k.html#gac73a66a3973afb51c4e585177647c693">snd_ctl_ext_key_t</a> key, <a class="el" href="structsnd__aes__iec958__t.html">snd_aes_iec958_t</a> *iec958)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">void(* </td><td class="memItemRight" valign="bottom"><a class="el" href="structsnd__ctl__ext__callback.html#a0f311ec8d3db7ec97649f30920039340">subscribe_events</a> )(snd_ctl_ext_t *ext, int subscribe)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int(* </td><td class="memItemRight" valign="bottom"><a class="el" href="structsnd__ctl__ext__callback.html#aa16c62c8263f68828bdee47439be1f1a">read_event</a> )(snd_ctl_ext_t *ext, <a class="el" href="group___control.html#gad6c3746f1925bfec6a4fd0e913430e55">snd_ctl_elem_id_t</a> *id, unsigned int *event_mask)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int(* </td><td class="memItemRight" valign="bottom"><a class="el" href="structsnd__ctl__ext__callback.html#a994cbf4dd0e427cf510ba03b84ea7fc0">poll_descriptors_count</a> )(snd_ctl_ext_t *ext)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int(* </td><td class="memItemRight" valign="bottom"><a class="el" href="structsnd__ctl__ext__callback.html#ad04f9c591423a484bb857b0d0fd85360">poll_descriptors</a> )(snd_ctl_ext_t *ext, struct pollfd *pfds, unsigned int space)</td></tr>
<tr><td class="memItemLeft" align="right" valign="top">int(* </td><td class="memItemRight" valign="bottom"><a class="el" href="structsnd__ctl__ext__callback.html#ad34cc5034e6b1ee1287311b63ef4786a">poll_revents</a> )(snd_ctl_ext_t *ext, struct pollfd *pfds, unsigned int nfds, unsigned short *revents)</td></tr>
</table>
<hr/><a name="_details"></a><h2>Detailed Description</h2>
<p>Callback table of ext</p>
<p>Callback table of control ext </p>
<hr/><h2>Field Documentation</h2>
<a class="anchor" id="a44779934bb91de1557271a53b71c94a8"></a><!-- doxytag: member="snd_ctl_ext_callback::close" ref="a44779934bb91de1557271a53b71c94a8" args=")(snd_ctl_ext_t *ext)" -->
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<td class="memname">void(* snd_ctl_ext_callback_t::close)(snd_ctl_ext_t *ext)</td>
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<p>close the control handle; optional </p>
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<a class="anchor" id="acc5ea4f6d7769e91970f545d6bdfa336"></a><!-- doxytag: member="snd_ctl_ext_callback::elem_count" ref="acc5ea4f6d7769e91970f545d6bdfa336" args=")(snd_ctl_ext_t *ext)" -->
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<td class="memname">int(* snd_ctl_ext_callback_t::elem_count)(snd_ctl_ext_t *ext)</td>
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<p>return the total number of elements; required </p>
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<a class="anchor" id="a6704251e9cc62fcfec4e630a4df1bac9"></a><!-- doxytag: member="snd_ctl_ext_callback::elem_list" ref="a6704251e9cc62fcfec4e630a4df1bac9" args=")(snd_ctl_ext_t *ext, unsigned int offset, snd_ctl_elem_id_t *id)" -->
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<td class="memname">int(* snd_ctl_ext_callback_t::elem_list)(snd_ctl_ext_t *ext, unsigned int offset, <a class="el" href="group___control.html#gad6c3746f1925bfec6a4fd0e913430e55">snd_ctl_elem_id_t</a> *id)</td>
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<p>return the element id of the given offset (array index); required </p>
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<a class="anchor" id="a1f352e46ab46f1f8eda7194de6dde912"></a><!-- doxytag: member="snd_ctl_ext_callback::find_elem" ref="a1f352e46ab46f1f8eda7194de6dde912" args=")(snd_ctl_ext_t *ext, const snd_ctl_elem_id_t *id)" -->
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<td class="memname"><a class="el" href="group___ctl_plugin___s_d_k.html#gac73a66a3973afb51c4e585177647c693">snd_ctl_ext_key_t</a>(* snd_ctl_ext_callback_t::find_elem)(snd_ctl_ext_t *ext, const <a class="el" href="group___control.html#gad6c3746f1925bfec6a4fd0e913430e55">snd_ctl_elem_id_t</a> *id)</td>
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<p>convert the element id to a search key; required </p>
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<a class="anchor" id="a06d74b7ada2f5aaf318353aaf7ea0a7a"></a><!-- doxytag: member="snd_ctl_ext_callback::free_key" ref="a06d74b7ada2f5aaf318353aaf7ea0a7a" args=")(snd_ctl_ext_t *ext, snd_ctl_ext_key_t key)" -->
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<td class="memname">void(* snd_ctl_ext_callback_t::free_key)(snd_ctl_ext_t *ext, <a class="el" href="group___ctl_plugin___s_d_k.html#gac73a66a3973afb51c4e585177647c693">snd_ctl_ext_key_t</a> key)</td>
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<p>the destructor of the key; optional </p>
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<a class="anchor" id="a9e9b8e2c2527c23130c92a3f2b5aa616"></a><!-- doxytag: member="snd_ctl_ext_callback::get_attribute" ref="a9e9b8e2c2527c23130c92a3f2b5aa616" args=")(snd_ctl_ext_t *ext, snd_ctl_ext_key_t key, int *type, unsigned int *acc, unsigned int *count)" -->
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<td class="memname">int(* snd_ctl_ext_callback_t::get_attribute)(snd_ctl_ext_t *ext, <a class="el" href="group___ctl_plugin___s_d_k.html#gac73a66a3973afb51c4e585177647c693">snd_ctl_ext_key_t</a> key, int *type, unsigned int *acc, unsigned int *count)</td>
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<p>get the attribute of the element; required </p>
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<a class="anchor" id="a4c1395e41c0da1740226eacd658f5262"></a><!-- doxytag: member="snd_ctl_ext_callback::get_enumerated_info" ref="a4c1395e41c0da1740226eacd658f5262" args=")(snd_ctl_ext_t *ext, snd_ctl_ext_key_t key, unsigned int *items)" -->
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<td class="memname">int(* snd_ctl_ext_callback_t::get_enumerated_info)(snd_ctl_ext_t *ext, <a class="el" href="group___ctl_plugin___s_d_k.html#gac73a66a3973afb51c4e585177647c693">snd_ctl_ext_key_t</a> key, unsigned int *items)</td>
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<p>get the element information of enumerated type </p>
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<a class="anchor" id="abd68965e4723e436d140561fdeff280d"></a><!-- doxytag: member="snd_ctl_ext_callback::get_enumerated_name" ref="abd68965e4723e436d140561fdeff280d" args=")(snd_ctl_ext_t *ext, snd_ctl_ext_key_t key, unsigned int item, char *name, size_t name_max_len)" -->
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<td class="memname">int(* snd_ctl_ext_callback_t::get_enumerated_name)(snd_ctl_ext_t *ext, <a class="el" href="group___ctl_plugin___s_d_k.html#gac73a66a3973afb51c4e585177647c693">snd_ctl_ext_key_t</a> key, unsigned int item, char *name, size_t name_max_len)</td>
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<p>get the name of the enumerated item </p>
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<a class="anchor" id="a12774a89d9d66b1fec865dddf5dbfd13"></a><!-- doxytag: member="snd_ctl_ext_callback::get_integer64_info" ref="a12774a89d9d66b1fec865dddf5dbfd13" args=")(snd_ctl_ext_t *ext, snd_ctl_ext_key_t key, int64_t *imin, int64_t *imax, int64_t *istep)" -->
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<td class="memname">int(* snd_ctl_ext_callback_t::get_integer64_info)(snd_ctl_ext_t *ext, <a class="el" href="group___ctl_plugin___s_d_k.html#gac73a66a3973afb51c4e585177647c693">snd_ctl_ext_key_t</a> key, int64_t *imin, int64_t *imax, int64_t *istep)</td>
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<p>get the element information of integer64 type </p>
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<a class="anchor" id="af71b075cd0326c4998d1708b25f7ab0f"></a><!-- doxytag: member="snd_ctl_ext_callback::get_integer_info" ref="af71b075cd0326c4998d1708b25f7ab0f" args=")(snd_ctl_ext_t *ext, snd_ctl_ext_key_t key, long *imin, long *imax, long *istep)" -->
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<td class="memname">int(* snd_ctl_ext_callback_t::get_integer_info)(snd_ctl_ext_t *ext, <a class="el" href="group___ctl_plugin___s_d_k.html#gac73a66a3973afb51c4e585177647c693">snd_ctl_ext_key_t</a> key, long *imin, long *imax, long *istep)</td>
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<p>get the element information of integer type </p>
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<a class="anchor" id="ad04f9c591423a484bb857b0d0fd85360"></a><!-- doxytag: member="snd_ctl_ext_callback::poll_descriptors" ref="ad04f9c591423a484bb857b0d0fd85360" args=")(snd_ctl_ext_t *ext, struct pollfd *pfds, unsigned int space)" -->
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<p>fill the poll descriptors; optional </p>
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<a class="anchor" id="a994cbf4dd0e427cf510ba03b84ea7fc0"></a><!-- doxytag: member="snd_ctl_ext_callback::poll_descriptors_count" ref="a994cbf4dd0e427cf510ba03b84ea7fc0" args=")(snd_ctl_ext_t *ext)" -->
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<p>return the number of poll descriptors; optional </p>
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<a class="anchor" id="ad34cc5034e6b1ee1287311b63ef4786a"></a><!-- doxytag: member="snd_ctl_ext_callback::poll_revents" ref="ad34cc5034e6b1ee1287311b63ef4786a" args=")(snd_ctl_ext_t *ext, struct pollfd *pfds, unsigned int nfds, unsigned short *revents)" -->
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<td class="memname">int(* snd_ctl_ext_callback_t::poll_revents)(snd_ctl_ext_t *ext, struct pollfd *pfds, unsigned int nfds, unsigned short *revents)</td>
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<p>mangle the revents of poll descriptors </p>
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<a class="anchor" id="a9b379d7ac330bc8f7d7e11ed04f22eb3"></a><!-- doxytag: member="snd_ctl_ext_callback::read_bytes" ref="a9b379d7ac330bc8f7d7e11ed04f22eb3" args=")(snd_ctl_ext_t *ext, snd_ctl_ext_key_t key, unsigned char *data, size_t max_bytes)" -->
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<td class="memname">int(* snd_ctl_ext_callback_t::read_bytes)(snd_ctl_ext_t *ext, <a class="el" href="group___ctl_plugin___s_d_k.html#gac73a66a3973afb51c4e585177647c693">snd_ctl_ext_key_t</a> key, unsigned char *data, size_t max_bytes)</td>
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<p>read the current values of bytes type </p>
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<a class="anchor" id="ae4cbfbd79dbf86f472d70170b7e20905"></a><!-- doxytag: member="snd_ctl_ext_callback::read_enumerated" ref="ae4cbfbd79dbf86f472d70170b7e20905" args=")(snd_ctl_ext_t *ext, snd_ctl_ext_key_t key, unsigned int *items)" -->
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<td class="memname">int(* snd_ctl_ext_callback_t::read_enumerated)(snd_ctl_ext_t *ext, <a class="el" href="group___ctl_plugin___s_d_k.html#gac73a66a3973afb51c4e585177647c693">snd_ctl_ext_key_t</a> key, unsigned int *items)</td>
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<p>read the current values of enumerated type </p>
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<a class="anchor" id="aa16c62c8263f68828bdee47439be1f1a"></a><!-- doxytag: member="snd_ctl_ext_callback::read_event" ref="aa16c62c8263f68828bdee47439be1f1a" args=")(snd_ctl_ext_t *ext, snd_ctl_elem_id_t *id, unsigned int *event_mask)" -->
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<td class="memname">int(* snd_ctl_ext_callback_t::read_event)(snd_ctl_ext_t *ext, <a class="el" href="group___control.html#gad6c3746f1925bfec6a4fd0e913430e55">snd_ctl_elem_id_t</a> *id, unsigned int *event_mask)</td>
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<p>read a pending notification event; optional </p>
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<a class="anchor" id="a1ed9e47299589f4c63fa326ac44ae9a6"></a><!-- doxytag: member="snd_ctl_ext_callback::read_iec958" ref="a1ed9e47299589f4c63fa326ac44ae9a6" args=")(snd_ctl_ext_t *ext, snd_ctl_ext_key_t key, snd_aes_iec958_t *iec958)" -->
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<td class="memname">int(* snd_ctl_ext_callback_t::read_iec958)(snd_ctl_ext_t *ext, <a class="el" href="group___ctl_plugin___s_d_k.html#gac73a66a3973afb51c4e585177647c693">snd_ctl_ext_key_t</a> key, <a class="el" href="structsnd__aes__iec958__t.html">snd_aes_iec958_t</a> *iec958)</td>
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<p>read the current values of iec958 type </p>
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<a class="anchor" id="aff147938f9e1751721a8ae9fb15beff5"></a><!-- doxytag: member="snd_ctl_ext_callback::read_integer" ref="aff147938f9e1751721a8ae9fb15beff5" args=")(snd_ctl_ext_t *ext, snd_ctl_ext_key_t key, long *value)" -->
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<td class="memname">int(* snd_ctl_ext_callback_t::read_integer)(snd_ctl_ext_t *ext, <a class="el" href="group___ctl_plugin___s_d_k.html#gac73a66a3973afb51c4e585177647c693">snd_ctl_ext_key_t</a> key, long *value)</td>
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<p>read the current values of integer type </p>
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<a class="anchor" id="a795645eea841d655219210ff9a16d935"></a><!-- doxytag: member="snd_ctl_ext_callback::read_integer64" ref="a795645eea841d655219210ff9a16d935" args=")(snd_ctl_ext_t *ext, snd_ctl_ext_key_t key, int64_t *value)" -->
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<td class="memname">int(* snd_ctl_ext_callback_t::read_integer64)(snd_ctl_ext_t *ext, <a class="el" href="group___ctl_plugin___s_d_k.html#gac73a66a3973afb51c4e585177647c693">snd_ctl_ext_key_t</a> key, int64_t *value)</td>
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<p>read the current values of integer64 type </p>
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<a class="anchor" id="a0f311ec8d3db7ec97649f30920039340"></a><!-- doxytag: member="snd_ctl_ext_callback::subscribe_events" ref="a0f311ec8d3db7ec97649f30920039340" args=")(snd_ctl_ext_t *ext, int subscribe)" -->
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<p>subscribe/unsubscribe the event notification; optional </p>
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<a class="anchor" id="a6e220e2b56735114fe86e3837f3a4470"></a><!-- doxytag: member="snd_ctl_ext_callback::write_bytes" ref="a6e220e2b56735114fe86e3837f3a4470" args=")(snd_ctl_ext_t *ext, snd_ctl_ext_key_t key, unsigned char *data, size_t max_bytes)" -->
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<td class="memname">int(* snd_ctl_ext_callback_t::write_bytes)(snd_ctl_ext_t *ext, <a class="el" href="group___ctl_plugin___s_d_k.html#gac73a66a3973afb51c4e585177647c693">snd_ctl_ext_key_t</a> key, unsigned char *data, size_t max_bytes)</td>
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<p>update the current values of bytes type with the given values </p>
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<a class="anchor" id="acdf226a341ddcc6dd38ae06f1b95f3a5"></a><!-- doxytag: member="snd_ctl_ext_callback::write_enumerated" ref="acdf226a341ddcc6dd38ae06f1b95f3a5" args=")(snd_ctl_ext_t *ext, snd_ctl_ext_key_t key, unsigned int *items)" -->
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<td class="memname">int(* snd_ctl_ext_callback_t::write_enumerated)(snd_ctl_ext_t *ext, <a class="el" href="group___ctl_plugin___s_d_k.html#gac73a66a3973afb51c4e585177647c693">snd_ctl_ext_key_t</a> key, unsigned int *items)</td>
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<p>update the current values of enumerated type with the given values </p>
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<a class="anchor" id="a07f9d3f151f08f32914e782db9e1b4ea"></a><!-- doxytag: member="snd_ctl_ext_callback::write_iec958" ref="a07f9d3f151f08f32914e782db9e1b4ea" args=")(snd_ctl_ext_t *ext, snd_ctl_ext_key_t key, snd_aes_iec958_t *iec958)" -->
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<td class="memname">int(* snd_ctl_ext_callback_t::write_iec958)(snd_ctl_ext_t *ext, <a class="el" href="group___ctl_plugin___s_d_k.html#gac73a66a3973afb51c4e585177647c693">snd_ctl_ext_key_t</a> key, <a class="el" href="structsnd__aes__iec958__t.html">snd_aes_iec958_t</a> *iec958)</td>
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<p>update the current values of iec958 type with the given values </p>
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<a class="anchor" id="aaf9722f3dc469ec0f02995b4706fc6e7"></a><!-- doxytag: member="snd_ctl_ext_callback::write_integer" ref="aaf9722f3dc469ec0f02995b4706fc6e7" args=")(snd_ctl_ext_t *ext, snd_ctl_ext_key_t key, long *value)" -->
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<td class="memname">int(* snd_ctl_ext_callback_t::write_integer)(snd_ctl_ext_t *ext, <a class="el" href="group___ctl_plugin___s_d_k.html#gac73a66a3973afb51c4e585177647c693">snd_ctl_ext_key_t</a> key, long *value)</td>
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<p>update the current values of integer type with the given values </p>
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<a class="anchor" id="a720034336e55e098a345df5170b0a0a0"></a><!-- doxytag: member="snd_ctl_ext_callback::write_integer64" ref="a720034336e55e098a345df5170b0a0a0" args=")(snd_ctl_ext_t *ext, snd_ctl_ext_key_t key, int64_t *value)" -->
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<td class="memname">int(* snd_ctl_ext_callback_t::write_integer64)(snd_ctl_ext_t *ext, <a class="el" href="group___ctl_plugin___s_d_k.html#gac73a66a3973afb51c4e585177647c693">snd_ctl_ext_key_t</a> key, int64_t *value)</td>
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<p>update the current values of integer64 type with the given values </p>
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<hr/>The documentation for this struct was generated from the following file:<ul>
<li>/home/qateam/rpm/BUILD/alsa-lib-1.0.23/include/<a class="el" href="control__external_8h_source.html">control_external.h</a></li>
</ul>
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