<!-- This comment will put IE 6, 7 and 8 in quirks mode --> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/> <title>ALSA project - the C library reference: snd_pcm_extplug_callback_t Struct Reference</title> <link href="tabs.css" rel="stylesheet" type="text/css"/> <link href="search/search.css" rel="stylesheet" type="text/css"/> <script type="text/javaScript" src="search/search.js"></script> <link href="doxygen.css" rel="stylesheet" type="text/css"/> </head> <body onload='searchBox.OnSelectItem(0);'> <!-- Generated by Doxygen 1.6.2-20100208 --> <script type="text/javascript"><!-- var searchBox = new SearchBox("searchBox", "search",false,'Search'); --></script> <div class="navigation" id="top"> <div class="tabs"> <ul> <li><a href="index.html"><span>Main Page</span></a></li> <li><a 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href="functions.html"><span>Data Fields</span></a></li> </ul> </div> </div> <div class="contents"> <h1>snd_pcm_extplug_callback_t Struct Reference<br/> <small> [<a class="el" href="group___p_c_m___ext_plug.html">External Filter plugin SDK</a>]</small> </h1><!-- doxytag: class="snd_pcm_extplug_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"><a class="el" href="group___p_c_m.html#ga71cdfa37e258d2210b8bd0216bf0c36c">snd_pcm_sframes_t</a>(* </td><td class="memItemRight" valign="bottom"><a class="el" href="structsnd__pcm__extplug__callback.html#a5c1c8cb34f5c1df7af6141362f473091">transfer</a> )(snd_pcm_extplug_t *ext, const <a class="el" href="structsnd__pcm__channel__area__t.html">snd_pcm_channel_area_t</a> *dst_areas, <a class="el" href="group___p_c_m.html#gab01fcfe9b97382a8d3f2027c664b8b8a">snd_pcm_uframes_t</a> dst_offset, const <a class="el" href="structsnd__pcm__channel__area__t.html">snd_pcm_channel_area_t</a> *src_areas, <a class="el" href="group___p_c_m.html#gab01fcfe9b97382a8d3f2027c664b8b8a">snd_pcm_uframes_t</a> src_offset, <a class="el" href="group___p_c_m.html#gab01fcfe9b97382a8d3f2027c664b8b8a">snd_pcm_uframes_t</a> size)</td></tr> <tr><td class="memItemLeft" align="right" valign="top">int(* </td><td class="memItemRight" valign="bottom"><a class="el" href="structsnd__pcm__extplug__callback.html#a7e26f4025337be9d0b36e9e248ba92ae">close</a> )(snd_pcm_extplug_t *ext)</td></tr> <tr><td class="memItemLeft" align="right" valign="top">int(* </td><td class="memItemRight" valign="bottom"><a class="el" href="structsnd__pcm__extplug__callback.html#a7215432f6873a74e5f24da0817a3bbae">hw_params</a> )(snd_pcm_extplug_t *ext, <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params)</td></tr> <tr><td class="memItemLeft" align="right" valign="top">int(* </td><td class="memItemRight" valign="bottom"><a class="el" href="structsnd__pcm__extplug__callback.html#ad24a08d2400288d5e708a6886b8be50f">hw_free</a> )(snd_pcm_extplug_t *ext)</td></tr> <tr><td class="memItemLeft" align="right" valign="top">void(* </td><td class="memItemRight" valign="bottom"><a class="el" href="structsnd__pcm__extplug__callback.html#a6532c068bce5dc458d8fd0a9e45284d2">dump</a> )(snd_pcm_extplug_t *ext, <a class="el" href="group___output.html#ga49729cc6454539495c1f5b6e95cd474a">snd_output_t</a> *out)</td></tr> <tr><td class="memItemLeft" align="right" valign="top">int(* </td><td class="memItemRight" valign="bottom"><a class="el" href="structsnd__pcm__extplug__callback.html#a75b2bd7ec54d8617c16dd2842b9d4bfe">init</a> )(snd_pcm_extplug_t *ext)</td></tr> </table> <hr/><a name="_details"></a><h2>Detailed Description</h2> <p>Callback table of extplug </p> <hr/><h2>Field Documentation</h2> <a class="anchor" id="a7e26f4025337be9d0b36e9e248ba92ae"></a><!-- doxytag: member="snd_pcm_extplug_callback::close" ref="a7e26f4025337be9d0b36e9e248ba92ae" args=")(snd_pcm_extplug_t *ext)" --> <div class="memitem"> <div class="memproto"> <table class="memname"> <tr> <td class="memname">int(* snd_pcm_extplug_callback_t::close)(snd_pcm_extplug_t *ext)</td> </tr> </table> </div> <div class="memdoc"> <p>close the PCM; optional </p> </div> </div> <a class="anchor" id="a6532c068bce5dc458d8fd0a9e45284d2"></a><!-- doxytag: member="snd_pcm_extplug_callback::dump" ref="a6532c068bce5dc458d8fd0a9e45284d2" args=")(snd_pcm_extplug_t *ext, snd_output_t *out)" --> <div class="memitem"> <div class="memproto"> <table class="memname"> <tr> <td class="memname">void(* snd_pcm_extplug_callback_t::dump)(snd_pcm_extplug_t *ext, <a class="el" href="group___output.html#ga49729cc6454539495c1f5b6e95cd474a">snd_output_t</a> *out)</td> </tr> </table> </div> <div class="memdoc"> <p>dump; optional </p> </div> </div> <a class="anchor" id="ad24a08d2400288d5e708a6886b8be50f"></a><!-- doxytag: member="snd_pcm_extplug_callback::hw_free" ref="ad24a08d2400288d5e708a6886b8be50f" args=")(snd_pcm_extplug_t *ext)" --> <div class="memitem"> <div class="memproto"> <table class="memname"> <tr> <td class="memname">int(* snd_pcm_extplug_callback_t::hw_free)(snd_pcm_extplug_t *ext)</td> </tr> </table> </div> <div class="memdoc"> <p>hw_free; optional </p> </div> </div> <a class="anchor" id="a7215432f6873a74e5f24da0817a3bbae"></a><!-- doxytag: member="snd_pcm_extplug_callback::hw_params" ref="a7215432f6873a74e5f24da0817a3bbae" args=")(snd_pcm_extplug_t *ext, snd_pcm_hw_params_t *params)" --> <div class="memitem"> <div class="memproto"> <table class="memname"> <tr> <td class="memname">int(* snd_pcm_extplug_callback_t::hw_params)(snd_pcm_extplug_t *ext, <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params)</td> </tr> </table> </div> <div class="memdoc"> <p>hw_params; optional </p> </div> </div> <a class="anchor" id="a75b2bd7ec54d8617c16dd2842b9d4bfe"></a><!-- doxytag: member="snd_pcm_extplug_callback::init" ref="a75b2bd7ec54d8617c16dd2842b9d4bfe" args=")(snd_pcm_extplug_t *ext)" --> <div class="memitem"> <div class="memproto"> <table class="memname"> <tr> <td class="memname">int(* snd_pcm_extplug_callback_t::init)(snd_pcm_extplug_t *ext)</td> </tr> </table> </div> <div class="memdoc"> <p>init; optional initialization called at prepare or reset </p> </div> </div> <a class="anchor" id="a5c1c8cb34f5c1df7af6141362f473091"></a><!-- doxytag: member="snd_pcm_extplug_callback::transfer" ref="a5c1c8cb34f5c1df7af6141362f473091" args=")(snd_pcm_extplug_t *ext, const snd_pcm_channel_area_t *dst_areas, snd_pcm_uframes_t dst_offset, const snd_pcm_channel_area_t *src_areas, snd_pcm_uframes_t src_offset, snd_pcm_uframes_t size)" --> <div class="memitem"> <div class="memproto"> <table class="memname"> <tr> <td class="memname"><a class="el" href="group___p_c_m.html#ga71cdfa37e258d2210b8bd0216bf0c36c">snd_pcm_sframes_t</a>(* snd_pcm_extplug_callback_t::transfer)(snd_pcm_extplug_t *ext, const <a class="el" href="structsnd__pcm__channel__area__t.html">snd_pcm_channel_area_t</a> *dst_areas, <a class="el" href="group___p_c_m.html#gab01fcfe9b97382a8d3f2027c664b8b8a">snd_pcm_uframes_t</a> dst_offset, const <a class="el" href="structsnd__pcm__channel__area__t.html">snd_pcm_channel_area_t</a> *src_areas, <a class="el" href="group___p_c_m.html#gab01fcfe9b97382a8d3f2027c664b8b8a">snd_pcm_uframes_t</a> src_offset, <a class="el" href="group___p_c_m.html#gab01fcfe9b97382a8d3f2027c664b8b8a">snd_pcm_uframes_t</a> size)</td> </tr> </table> </div> <div class="memdoc"> <p>transfer between source and destination; this is a required callback </p> </div> </div> <hr/>The documentation for this struct was generated from the following file:<ul> <li>/builddir/build/BUILD/alsa-lib-1.0.23/include/<a class="el" 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