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<div class="title">snd_pcm_ioplug_callback_t Struct Reference<div class="ingroups"><a class="el" href="group___plugin___s_d_k.html">External PCM plugin SDK</a> » <a class="el" href="group___p_c_m___i_o_plug.html">External I/O plugin SDK</a></div></div> </div>
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Data Fields</h2></td></tr>
<tr class="memitem:a7468068dda785aa176ff26e5133411bc"><td class="memItemLeft" align="right" valign="top">int(* </td><td class="memItemRight" valign="bottom"><a class="el" href="structsnd__pcm__ioplug__callback.html#a7468068dda785aa176ff26e5133411bc">start</a> )(<a class="el" href="group___p_c_m___i_o_plug.html#ga1038655a4ca74f3aef060282d6df739b">snd_pcm_ioplug_t</a> *io)</td></tr>
<tr class="separator:a7468068dda785aa176ff26e5133411bc"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ab1bb5494c38ee557129df62afdfb49bb"><td class="memItemLeft" align="right" valign="top">int(* </td><td class="memItemRight" valign="bottom"><a class="el" href="structsnd__pcm__ioplug__callback.html#ab1bb5494c38ee557129df62afdfb49bb">stop</a> )(<a class="el" href="group___p_c_m___i_o_plug.html#ga1038655a4ca74f3aef060282d6df739b">snd_pcm_ioplug_t</a> *io)</td></tr>
<tr class="separator:ab1bb5494c38ee557129df62afdfb49bb"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a4845417f0aebd54219185c7efaede2c0"><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__ioplug__callback.html#a4845417f0aebd54219185c7efaede2c0">pointer</a> )(<a class="el" href="group___p_c_m___i_o_plug.html#ga1038655a4ca74f3aef060282d6df739b">snd_pcm_ioplug_t</a> *io)</td></tr>
<tr class="separator:a4845417f0aebd54219185c7efaede2c0"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ad7dbd481a29d2f92c26d12695ae1d4ac"><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__ioplug__callback.html#ad7dbd481a29d2f92c26d12695ae1d4ac">transfer</a> )(<a class="el" href="group___p_c_m___i_o_plug.html#ga1038655a4ca74f3aef060282d6df739b">snd_pcm_ioplug_t</a> *io, const <a class="el" href="structsnd__pcm__channel__area__t.html">snd_pcm_channel_area_t</a> *areas, <a class="el" href="group___p_c_m.html#gab01fcfe9b97382a8d3f2027c664b8b8a">snd_pcm_uframes_t</a> offset, <a class="el" href="group___p_c_m.html#gab01fcfe9b97382a8d3f2027c664b8b8a">snd_pcm_uframes_t</a> size)</td></tr>
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<tr class="memitem:a3e82606488e2ccb5148dbe1b39cb4f88"><td class="memItemLeft" align="right" valign="top">int(* </td><td class="memItemRight" valign="bottom"><a class="el" href="structsnd__pcm__ioplug__callback.html#a3e82606488e2ccb5148dbe1b39cb4f88">close</a> )(<a class="el" href="group___p_c_m___i_o_plug.html#ga1038655a4ca74f3aef060282d6df739b">snd_pcm_ioplug_t</a> *io)</td></tr>
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<tr class="memitem:a57381783ffd6f0cea8836a151b0eaa87"><td class="memItemLeft" align="right" valign="top">int(* </td><td class="memItemRight" valign="bottom"><a class="el" href="structsnd__pcm__ioplug__callback.html#a57381783ffd6f0cea8836a151b0eaa87">hw_params</a> )(<a class="el" href="group___p_c_m___i_o_plug.html#ga1038655a4ca74f3aef060282d6df739b">snd_pcm_ioplug_t</a> *io, <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params)</td></tr>
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<tr class="memitem:aaf77cc71c899d58b9a9348c5efeab72f"><td class="memItemLeft" align="right" valign="top">int(* </td><td class="memItemRight" valign="bottom"><a class="el" href="structsnd__pcm__ioplug__callback.html#aaf77cc71c899d58b9a9348c5efeab72f">hw_free</a> )(<a class="el" href="group___p_c_m___i_o_plug.html#ga1038655a4ca74f3aef060282d6df739b">snd_pcm_ioplug_t</a> *io)</td></tr>
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<tr class="memitem:a8688847dcfab7d4e8a091f81aa351965"><td class="memItemLeft" align="right" valign="top">int(* </td><td class="memItemRight" valign="bottom"><a class="el" href="structsnd__pcm__ioplug__callback.html#a8688847dcfab7d4e8a091f81aa351965">sw_params</a> )(<a class="el" href="group___p_c_m___i_o_plug.html#ga1038655a4ca74f3aef060282d6df739b">snd_pcm_ioplug_t</a> *io, <a class="el" href="group___p_c_m.html#ga7e082d9ea701709270b0674a0be23b09">snd_pcm_sw_params_t</a> *params)</td></tr>
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<tr class="memitem:a071405a306b66091c61039b7997d8685"><td class="memItemLeft" align="right" valign="top">int(* </td><td class="memItemRight" valign="bottom"><a class="el" href="structsnd__pcm__ioplug__callback.html#a071405a306b66091c61039b7997d8685">prepare</a> )(<a class="el" href="group___p_c_m___i_o_plug.html#ga1038655a4ca74f3aef060282d6df739b">snd_pcm_ioplug_t</a> *io)</td></tr>
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<tr class="memitem:a5bc9a5f9d0be0f284458a94e44b5fdb3"><td class="memItemLeft" align="right" valign="top">int(* </td><td class="memItemRight" valign="bottom"><a class="el" href="structsnd__pcm__ioplug__callback.html#a5bc9a5f9d0be0f284458a94e44b5fdb3">drain</a> )(<a class="el" href="group___p_c_m___i_o_plug.html#ga1038655a4ca74f3aef060282d6df739b">snd_pcm_ioplug_t</a> *io)</td></tr>
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<tr class="memitem:a68f7c891a62620fb90bfd929313e56b3"><td class="memItemLeft" align="right" valign="top">int(* </td><td class="memItemRight" valign="bottom"><a class="el" href="structsnd__pcm__ioplug__callback.html#a68f7c891a62620fb90bfd929313e56b3">pause</a> )(<a class="el" href="group___p_c_m___i_o_plug.html#ga1038655a4ca74f3aef060282d6df739b">snd_pcm_ioplug_t</a> *io, int enable)</td></tr>
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<tr class="memitem:a1176d8570c78351ed5b957b7c6c5884f"><td class="memItemLeft" align="right" valign="top">int(* </td><td class="memItemRight" valign="bottom"><a class="el" href="structsnd__pcm__ioplug__callback.html#a1176d8570c78351ed5b957b7c6c5884f">resume</a> )(<a class="el" href="group___p_c_m___i_o_plug.html#ga1038655a4ca74f3aef060282d6df739b">snd_pcm_ioplug_t</a> *io)</td></tr>
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<tr class="memitem:a5c32d0aee17ebea124b3e8f11dad68e9"><td class="memItemLeft" align="right" valign="top">int(* </td><td class="memItemRight" valign="bottom"><a class="el" href="structsnd__pcm__ioplug__callback.html#a5c32d0aee17ebea124b3e8f11dad68e9">poll_descriptors_count</a> )(<a class="el" href="group___p_c_m___i_o_plug.html#ga1038655a4ca74f3aef060282d6df739b">snd_pcm_ioplug_t</a> *io)</td></tr>
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<tr class="memitem:a6793d36d985acd08ca95776e59763b3a"><td class="memItemLeft" align="right" valign="top">int(* </td><td class="memItemRight" valign="bottom"><a class="el" href="structsnd__pcm__ioplug__callback.html#a6793d36d985acd08ca95776e59763b3a">poll_descriptors</a> )(<a class="el" href="group___p_c_m___i_o_plug.html#ga1038655a4ca74f3aef060282d6df739b">snd_pcm_ioplug_t</a> *io, struct pollfd *pfd, unsigned int space)</td></tr>
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<tr class="memitem:a7b8c4cab575b38ed24371b1afdc5c6b9"><td class="memItemLeft" align="right" valign="top">int(* </td><td class="memItemRight" valign="bottom"><a class="el" href="structsnd__pcm__ioplug__callback.html#a7b8c4cab575b38ed24371b1afdc5c6b9">poll_revents</a> )(<a class="el" href="group___p_c_m___i_o_plug.html#ga1038655a4ca74f3aef060282d6df739b">snd_pcm_ioplug_t</a> *io, struct pollfd *pfd, unsigned int nfds, unsigned short *revents)</td></tr>
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<tr class="memitem:a839c05869c4dfd5e9b81224fe21c66fd"><td class="memItemLeft" align="right" valign="top">void(* </td><td class="memItemRight" valign="bottom"><a class="el" href="structsnd__pcm__ioplug__callback.html#a839c05869c4dfd5e9b81224fe21c66fd">dump</a> )(<a class="el" href="group___p_c_m___i_o_plug.html#ga1038655a4ca74f3aef060282d6df739b">snd_pcm_ioplug_t</a> *io, <a class="el" href="group___output.html#ga49729cc6454539495c1f5b6e95cd474a">snd_output_t</a> *out)</td></tr>
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<tr class="memitem:a4ae1a94b5a4e1946750c2fc71c0197ba"><td class="memItemLeft" align="right" valign="top">int(* </td><td class="memItemRight" valign="bottom"><a class="el" href="structsnd__pcm__ioplug__callback.html#a4ae1a94b5a4e1946750c2fc71c0197ba">delay</a> )(<a class="el" href="group___p_c_m___i_o_plug.html#ga1038655a4ca74f3aef060282d6df739b">snd_pcm_ioplug_t</a> *io, <a class="el" href="group___p_c_m.html#ga71cdfa37e258d2210b8bd0216bf0c36c">snd_pcm_sframes_t</a> *delayp)</td></tr>
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<tr class="memitem:aadaf669911046e91fdba3b15fe2a4839"><td class="memItemLeft" align="right" valign="top"><a class="el" href="structsnd__pcm__chmap__query__t.html">snd_pcm_chmap_query_t</a> **(* </td><td class="memItemRight" valign="bottom"><a class="el" href="structsnd__pcm__ioplug__callback.html#aadaf669911046e91fdba3b15fe2a4839">query_chmaps</a> )(<a class="el" href="group___p_c_m___i_o_plug.html#ga1038655a4ca74f3aef060282d6df739b">snd_pcm_ioplug_t</a> *io)</td></tr>
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<tr class="memitem:a364feac16fc31f508ea67525c42e26dc"><td class="memItemLeft" align="right" valign="top"><a class="el" href="structsnd__pcm__chmap__t.html">snd_pcm_chmap_t</a> *(* </td><td class="memItemRight" valign="bottom"><a class="el" href="structsnd__pcm__ioplug__callback.html#a364feac16fc31f508ea67525c42e26dc">get_chmap</a> )(<a class="el" href="group___p_c_m___i_o_plug.html#ga1038655a4ca74f3aef060282d6df739b">snd_pcm_ioplug_t</a> *io)</td></tr>
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<tr class="memitem:a8eb02dcaecc9b5120e6c29359167efa6"><td class="memItemLeft" align="right" valign="top">int(* </td><td class="memItemRight" valign="bottom"><a class="el" href="structsnd__pcm__ioplug__callback.html#a8eb02dcaecc9b5120e6c29359167efa6">set_chmap</a> )(<a class="el" href="group___p_c_m___i_o_plug.html#ga1038655a4ca74f3aef060282d6df739b">snd_pcm_ioplug_t</a> *io, const <a class="el" href="structsnd__pcm__chmap__t.html">snd_pcm_chmap_t</a> *map)</td></tr>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><p>Callback table of ioplug </p>
</div><h2 class="groupheader">Field Documentation</h2>
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<h2 class="memtitle"><span class="permalink"><a href="#a3e82606488e2ccb5148dbe1b39cb4f88">◆ </a></span>close</h2>
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<td class="memname">int(* snd_pcm_ioplug_callback_t::close) (<a class="el" href="group___p_c_m___i_o_plug.html#ga1038655a4ca74f3aef060282d6df739b">snd_pcm_ioplug_t</a> *io)</td>
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<p>close the PCM; optional </p>
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<h2 class="memtitle"><span class="permalink"><a href="#a4ae1a94b5a4e1946750c2fc71c0197ba">◆ </a></span>delay</h2>
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<td class="memname">int(* snd_pcm_ioplug_callback_t::delay) (<a class="el" href="group___p_c_m___i_o_plug.html#ga1038655a4ca74f3aef060282d6df739b">snd_pcm_ioplug_t</a> *io, <a class="el" href="group___p_c_m.html#ga71cdfa37e258d2210b8bd0216bf0c36c">snd_pcm_sframes_t</a> *delayp)</td>
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<p>get the delay for the running PCM; optional; since v1.0.1 </p>
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<h2 class="memtitle"><span class="permalink"><a href="#a5bc9a5f9d0be0f284458a94e44b5fdb3">◆ </a></span>drain</h2>
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<td class="memname">int(* snd_pcm_ioplug_callback_t::drain) (<a class="el" href="group___p_c_m___i_o_plug.html#ga1038655a4ca74f3aef060282d6df739b">snd_pcm_ioplug_t</a> *io)</td>
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<p>drain; optional </p>
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<a id="a839c05869c4dfd5e9b81224fe21c66fd"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a839c05869c4dfd5e9b81224fe21c66fd">◆ </a></span>dump</h2>
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<td class="memname">void(* snd_pcm_ioplug_callback_t::dump) (<a class="el" href="group___p_c_m___i_o_plug.html#ga1038655a4ca74f3aef060282d6df739b">snd_pcm_ioplug_t</a> *io, <a class="el" href="group___output.html#ga49729cc6454539495c1f5b6e95cd474a">snd_output_t</a> *out)</td>
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<p>dump; optional </p>
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<h2 class="memtitle"><span class="permalink"><a href="#a364feac16fc31f508ea67525c42e26dc">◆ </a></span>get_chmap</h2>
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<td class="memname"><a class="el" href="structsnd__pcm__chmap__t.html">snd_pcm_chmap_t</a>*(* snd_pcm_ioplug_callback_t::get_chmap) (<a class="el" href="group___p_c_m___i_o_plug.html#ga1038655a4ca74f3aef060282d6df739b">snd_pcm_ioplug_t</a> *io)</td>
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<p>get the channel map; optional; since v1.0.2 </p>
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<h2 class="memtitle"><span class="permalink"><a href="#aaf77cc71c899d58b9a9348c5efeab72f">◆ </a></span>hw_free</h2>
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<td class="memname">int(* snd_pcm_ioplug_callback_t::hw_free) (<a class="el" href="group___p_c_m___i_o_plug.html#ga1038655a4ca74f3aef060282d6df739b">snd_pcm_ioplug_t</a> *io)</td>
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<p>hw_free; optional </p>
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<h2 class="memtitle"><span class="permalink"><a href="#a57381783ffd6f0cea8836a151b0eaa87">◆ </a></span>hw_params</h2>
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<td class="memname">int(* snd_pcm_ioplug_callback_t::hw_params) (<a class="el" href="group___p_c_m___i_o_plug.html#ga1038655a4ca74f3aef060282d6df739b">snd_pcm_ioplug_t</a> *io, <a class="el" href="group___p_c_m.html#ga65c737127994f0a980edad744e36dc40">snd_pcm_hw_params_t</a> *params)</td>
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<p>hw_params; optional </p>
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<h2 class="memtitle"><span class="permalink"><a href="#a68f7c891a62620fb90bfd929313e56b3">◆ </a></span>pause</h2>
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<td class="memname">int(* snd_pcm_ioplug_callback_t::pause) (<a class="el" href="group___p_c_m___i_o_plug.html#ga1038655a4ca74f3aef060282d6df739b">snd_pcm_ioplug_t</a> *io, int enable)</td>
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<p>toggle pause; optional, called inside mutex lock </p>
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<h2 class="memtitle"><span class="permalink"><a href="#a4845417f0aebd54219185c7efaede2c0">◆ </a></span>pointer</h2>
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<td class="memname"><a class="el" href="group___p_c_m.html#ga71cdfa37e258d2210b8bd0216bf0c36c">snd_pcm_sframes_t</a>(* snd_pcm_ioplug_callback_t::pointer) (<a class="el" href="group___p_c_m___i_o_plug.html#ga1038655a4ca74f3aef060282d6df739b">snd_pcm_ioplug_t</a> *io)</td>
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<p>get the current DMA position; required, called inside mutex lock </p><dl class="section return"><dt>Returns</dt><dd>buffer position up to buffer_size or when <a class="el" href="group___p_c_m___i_o_plug.html#gaf7f7da416f798efac868aa5a88f1e47b">SND_PCM_IOPLUG_FLAG_BOUNDARY_WA</a> flag is set up to boundary or a negative error code for Xrun </dd></dl>
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<h2 class="memtitle"><span class="permalink"><a href="#a6793d36d985acd08ca95776e59763b3a">◆ </a></span>poll_descriptors</h2>
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<td class="memname">int(* snd_pcm_ioplug_callback_t::poll_descriptors) (<a class="el" href="group___p_c_m___i_o_plug.html#ga1038655a4ca74f3aef060282d6df739b">snd_pcm_ioplug_t</a> *io, struct pollfd *pfd, unsigned int space)</td>
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<p>poll descriptors; optional </p>
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<h2 class="memtitle"><span class="permalink"><a href="#a5c32d0aee17ebea124b3e8f11dad68e9">◆ </a></span>poll_descriptors_count</h2>
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<td class="memname">int(* snd_pcm_ioplug_callback_t::poll_descriptors_count) (<a class="el" href="group___p_c_m___i_o_plug.html#ga1038655a4ca74f3aef060282d6df739b">snd_pcm_ioplug_t</a> *io)</td>
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<p>poll descriptors count; optional </p>
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<h2 class="memtitle"><span class="permalink"><a href="#a7b8c4cab575b38ed24371b1afdc5c6b9">◆ </a></span>poll_revents</h2>
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<td class="memname">int(* snd_pcm_ioplug_callback_t::poll_revents) (<a class="el" href="group___p_c_m___i_o_plug.html#ga1038655a4ca74f3aef060282d6df739b">snd_pcm_ioplug_t</a> *io, struct pollfd *pfd, unsigned int nfds, unsigned short *revents)</td>
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<p>mangle poll events; optional </p>
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<h2 class="memtitle"><span class="permalink"><a href="#a071405a306b66091c61039b7997d8685">◆ </a></span>prepare</h2>
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<td class="memname">int(* snd_pcm_ioplug_callback_t::prepare) (<a class="el" href="group___p_c_m___i_o_plug.html#ga1038655a4ca74f3aef060282d6df739b">snd_pcm_ioplug_t</a> *io)</td>
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<p>prepare; optional </p>
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<h2 class="memtitle"><span class="permalink"><a href="#aadaf669911046e91fdba3b15fe2a4839">◆ </a></span>query_chmaps</h2>
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<td class="memname"><a class="el" href="structsnd__pcm__chmap__query__t.html">snd_pcm_chmap_query_t</a>**(* snd_pcm_ioplug_callback_t::query_chmaps) (<a class="el" href="group___p_c_m___i_o_plug.html#ga1038655a4ca74f3aef060282d6df739b">snd_pcm_ioplug_t</a> *io)</td>
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<p>query the channel maps; optional; since v1.0.2 </p>
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<h2 class="memtitle"><span class="permalink"><a href="#a1176d8570c78351ed5b957b7c6c5884f">◆ </a></span>resume</h2>
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<td class="memname">int(* snd_pcm_ioplug_callback_t::resume) (<a class="el" href="group___p_c_m___i_o_plug.html#ga1038655a4ca74f3aef060282d6df739b">snd_pcm_ioplug_t</a> *io)</td>
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<p>resume; optional </p>
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<h2 class="memtitle"><span class="permalink"><a href="#a8eb02dcaecc9b5120e6c29359167efa6">◆ </a></span>set_chmap</h2>
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<td class="memname">int(* snd_pcm_ioplug_callback_t::set_chmap) (<a class="el" href="group___p_c_m___i_o_plug.html#ga1038655a4ca74f3aef060282d6df739b">snd_pcm_ioplug_t</a> *io, const <a class="el" href="structsnd__pcm__chmap__t.html">snd_pcm_chmap_t</a> *map)</td>
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<p>set the channel map; optional; since v1.0.2 </p>
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<h2 class="memtitle"><span class="permalink"><a href="#a7468068dda785aa176ff26e5133411bc">◆ </a></span>start</h2>
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<td class="memname">int(* snd_pcm_ioplug_callback_t::start) (<a class="el" href="group___p_c_m___i_o_plug.html#ga1038655a4ca74f3aef060282d6df739b">snd_pcm_ioplug_t</a> *io)</td>
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<p>start the PCM; required, called inside mutex lock </p>
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<h2 class="memtitle"><span class="permalink"><a href="#ab1bb5494c38ee557129df62afdfb49bb">◆ </a></span>stop</h2>
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<td class="memname">int(* snd_pcm_ioplug_callback_t::stop) (<a class="el" href="group___p_c_m___i_o_plug.html#ga1038655a4ca74f3aef060282d6df739b">snd_pcm_ioplug_t</a> *io)</td>
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<p>stop the PCM; required, called inside mutex lock </p>
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<h2 class="memtitle"><span class="permalink"><a href="#a8688847dcfab7d4e8a091f81aa351965">◆ </a></span>sw_params</h2>
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<td class="memname">int(* snd_pcm_ioplug_callback_t::sw_params) (<a class="el" href="group___p_c_m___i_o_plug.html#ga1038655a4ca74f3aef060282d6df739b">snd_pcm_ioplug_t</a> *io, <a class="el" href="group___p_c_m.html#ga7e082d9ea701709270b0674a0be23b09">snd_pcm_sw_params_t</a> *params)</td>
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<p>sw_params; optional </p>
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<h2 class="memtitle"><span class="permalink"><a href="#ad7dbd481a29d2f92c26d12695ae1d4ac">◆ </a></span>transfer</h2>
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<td class="memname"><a class="el" href="group___p_c_m.html#ga71cdfa37e258d2210b8bd0216bf0c36c">snd_pcm_sframes_t</a>(* snd_pcm_ioplug_callback_t::transfer) (<a class="el" href="group___p_c_m___i_o_plug.html#ga1038655a4ca74f3aef060282d6df739b">snd_pcm_ioplug_t</a> *io, const <a class="el" href="structsnd__pcm__channel__area__t.html">snd_pcm_channel_area_t</a> *areas, <a class="el" href="group___p_c_m.html#gab01fcfe9b97382a8d3f2027c664b8b8a">snd_pcm_uframes_t</a> offset, <a class="el" href="group___p_c_m.html#gab01fcfe9b97382a8d3f2027c664b8b8a">snd_pcm_uframes_t</a> size)</td>
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<p>transfer the data; optional, called inside mutex lock </p>
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<hr/>The documentation for this struct was generated from the following file:<ul>
<li>/builddir/build/BUILD/alsa-lib-1.2.13/include/<a class="el" href="pcm__ioplug_8h_source.html">pcm_ioplug.h</a></li>
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