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 <span id="projectnumber">2.0</span>
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<div class="title">pa_win_wasapi.h File Reference<div class="ingroups"><a class="el" href="group__public__header.html">Public API definitions for users of PortAudio</a></div></div> </div>
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<p>WASAPI-specific PortAudio API extension header file.
<a href="#details">More...</a></p>
<div class="textblock"><code>#include "<a class="el" href="portaudio_8h_source.html">portaudio.h</a>"</code><br/>
<code>#include "<a class="el" href="pa__win__waveformat_8h_source.html">pa_win_waveformat.h</a>"</code><br/>
</div>
<p><a href="pa__win__wasapi_8h_source.html">Go to the source code of this file.</a></p>
<table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="nested-classes"></a>
Data Structures</h2></td></tr>
<tr class="memitem:"><td class="memItemLeft" align="right" valign="top">struct  </td><td class="memItemRight" valign="bottom"><a class="el" href="structPaWasapiJackDescription.html">PaWasapiJackDescription</a></td></tr>
<tr class="separator:"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:"><td class="memItemLeft" align="right" valign="top">struct  </td><td class="memItemRight" valign="bottom"><a class="el" href="structPaWasapiStreamInfo.html">PaWasapiStreamInfo</a></td></tr>
<tr class="separator:"><td class="memSeparator" colspan="2"> </td></tr>
</table><table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="define-members"></a>
Macros</h2></td></tr>
<tr class="memitem:a52079738ea6bdb82c7672850d72643d0"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a52079738ea6bdb82c7672850d72643d0"></a>
#define </td><td class="memItemRight" valign="bottom"><b>paWinWasapiExclusive</b>   (paWinWasapiExclusive)</td></tr>
<tr class="separator:a52079738ea6bdb82c7672850d72643d0"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a04b5df0ea5e1b6e9299b07963e96f1ff"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a04b5df0ea5e1b6e9299b07963e96f1ff"></a>
#define </td><td class="memItemRight" valign="bottom"><b>paWinWasapiRedirectHostProcessor</b>   (paWinWasapiRedirectHostProcessor)</td></tr>
<tr class="separator:a04b5df0ea5e1b6e9299b07963e96f1ff"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:af47a337bb1cf6a3036978844001da434"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="af47a337bb1cf6a3036978844001da434"></a>
#define </td><td class="memItemRight" valign="bottom"><b>paWinWasapiUseChannelMask</b>   (paWinWasapiUseChannelMask)</td></tr>
<tr class="separator:af47a337bb1cf6a3036978844001da434"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ab7cfc855244ee76f5fddb20584218270"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="ab7cfc855244ee76f5fddb20584218270"></a>
#define </td><td class="memItemRight" valign="bottom"><b>paWinWasapiPolling</b>   (paWinWasapiPolling)</td></tr>
<tr class="separator:ab7cfc855244ee76f5fddb20584218270"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:adb59e164778bb67e97fc7ac1dacb6af9"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="adb59e164778bb67e97fc7ac1dacb6af9"></a>
#define </td><td class="memItemRight" valign="bottom"><b>paWinWasapiThreadPriority</b>   (paWinWasapiThreadPriority)</td></tr>
<tr class="separator:adb59e164778bb67e97fc7ac1dacb6af9"><td class="memSeparator" colspan="2"> </td></tr>
</table><table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="typedef-members"></a>
Typedefs</h2></td></tr>
<tr class="memitem:a986e4478c206c714605649ebfc6d65fd"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a986e4478c206c714605649ebfc6d65fd"></a>
typedef enum PaWasapiFlags </td><td class="memItemRight" valign="bottom"><b>PaWasapiFlags</b></td></tr>
<tr class="separator:a986e4478c206c714605649ebfc6d65fd"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a8f4cd4ffd2817af0330650ddf7abc7ab"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a8f4cd4ffd2817af0330650ddf7abc7ab"></a>
typedef void(* </td><td class="memItemRight" valign="bottom"><b>PaWasapiHostProcessorCallback</b> )(void *inputBuffer, long inputFrames, void *outputBuffer, long outputFrames, void *userData)</td></tr>
<tr class="separator:a8f4cd4ffd2817af0330650ddf7abc7ab"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a0bfc7213543bf5c39c828c8e3c04cb3a"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a0bfc7213543bf5c39c828c8e3c04cb3a"></a>
typedef enum PaWasapiDeviceRole </td><td class="memItemRight" valign="bottom"><b>PaWasapiDeviceRole</b></td></tr>
<tr class="separator:a0bfc7213543bf5c39c828c8e3c04cb3a"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a78700b7c84bd2449e02908ac01c35031"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a78700b7c84bd2449e02908ac01c35031"></a>
typedef enum <br class="typebreak"/>
PaWasapiJackConnectionType </td><td class="memItemRight" valign="bottom"><b>PaWasapiJackConnectionType</b></td></tr>
<tr class="separator:a78700b7c84bd2449e02908ac01c35031"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a93be6cd330c2b18ffbc7d935cd9189ca"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a93be6cd330c2b18ffbc7d935cd9189ca"></a>
typedef enum <br class="typebreak"/>
PaWasapiJackGeoLocation </td><td class="memItemRight" valign="bottom"><b>PaWasapiJackGeoLocation</b></td></tr>
<tr class="separator:a93be6cd330c2b18ffbc7d935cd9189ca"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ab2c2d1f96a7704ee6605cf749a3bcd99"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="ab2c2d1f96a7704ee6605cf749a3bcd99"></a>
typedef enum <br class="typebreak"/>
PaWasapiJackGenLocation </td><td class="memItemRight" valign="bottom"><b>PaWasapiJackGenLocation</b></td></tr>
<tr class="separator:ab2c2d1f96a7704ee6605cf749a3bcd99"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a6af7723dcc581377a27b8f73defdd6f0"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a6af7723dcc581377a27b8f73defdd6f0"></a>
typedef enum <br class="typebreak"/>
PaWasapiJackPortConnection </td><td class="memItemRight" valign="bottom"><b>PaWasapiJackPortConnection</b></td></tr>
<tr class="separator:a6af7723dcc581377a27b8f73defdd6f0"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:abf52de70a0235570811a1fe6ae91fff0"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="abf52de70a0235570811a1fe6ae91fff0"></a>
typedef enum <a class="el" href="pa__win__wasapi_8h.html#a561291b0188f6f29246ea669b48e2661">PaWasapiThreadPriority</a> </td><td class="memItemRight" valign="bottom"><b>PaWasapiThreadPriority</b></td></tr>
<tr class="separator:abf52de70a0235570811a1fe6ae91fff0"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a2463d4ddd09098a6d92dd7648c9d83c7"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a2463d4ddd09098a6d92dd7648c9d83c7"></a>
typedef struct <br class="typebreak"/>
<a class="el" href="structPaWasapiJackDescription.html">PaWasapiJackDescription</a> </td><td class="memItemRight" valign="bottom"><b>PaWasapiJackDescription</b></td></tr>
<tr class="separator:a2463d4ddd09098a6d92dd7648c9d83c7"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a719183c089847f92d06b2f14a4b5f6f7"><td class="memItemLeft" align="right" valign="top"><a class="anchor" id="a719183c089847f92d06b2f14a4b5f6f7"></a>
typedef struct <a class="el" href="structPaWasapiStreamInfo.html">PaWasapiStreamInfo</a> </td><td class="memItemRight" valign="bottom"><b>PaWasapiStreamInfo</b></td></tr>
<tr class="separator:a719183c089847f92d06b2f14a4b5f6f7"><td class="memSeparator" colspan="2"> </td></tr>
</table><table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="enum-members"></a>
Enumerations</h2></td></tr>
<tr class="memitem:a5d5e585f667bc748c7cab4c9c4a725be"><td class="memItemLeft" align="right" valign="top">enum  </td><td class="memItemRight" valign="bottom"><b>PaWasapiFlags</b> { <br/>
  <b>paWinWasapiExclusive</b> = (1 << 0),
<b>paWinWasapiRedirectHostProcessor</b> = (1 << 1),
<b>paWinWasapiUseChannelMask</b> = (1 << 2),
<b>paWinWasapiPolling</b> = (1 << 3),
<br/>
  <b>paWinWasapiThreadPriority</b> = (1 << 4)
<br/>
}</td></tr>
<tr class="separator:a5d5e585f667bc748c7cab4c9c4a725be"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a9456f380d3e74aa733b80315010a40de"><td class="memItemLeft" align="right" valign="top">enum  </td><td class="memItemRight" valign="bottom"><b>PaWasapiDeviceRole</b> { <br/>
  <b>eRoleRemoteNetworkDevice</b> = 0,
<b>eRoleSpeakers</b>,
<b>eRoleLineLevel</b>,
<b>eRoleHeadphones</b>,
<br/>
  <b>eRoleMicrophone</b>,
<b>eRoleHeadset</b>,
<b>eRoleHandset</b>,
<b>eRoleUnknownDigitalPassthrough</b>,
<br/>
  <b>eRoleSPDIF</b>,
<b>eRoleHDMI</b>,
<b>eRoleUnknownFormFactor</b>
<br/>
}</td></tr>
<tr class="separator:a9456f380d3e74aa733b80315010a40de"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a40b6ae7a53886196c59afe8b704695e1"><td class="memItemLeft" align="right" valign="top">enum  </td><td class="memItemRight" valign="bottom"><b>PaWasapiJackConnectionType</b> { <br/>
  <b>eJackConnTypeUnknown</b>,
<b>eJackConnType3Point5mm</b>,
<b>eJackConnTypeQuarter</b>,
<b>eJackConnTypeAtapiInternal</b>,
<br/>
  <b>eJackConnTypeRCA</b>,
<b>eJackConnTypeOptical</b>,
<b>eJackConnTypeOtherDigital</b>,
<b>eJackConnTypeOtherAnalog</b>,
<br/>
  <b>eJackConnTypeMultichannelAnalogDIN</b>,
<b>eJackConnTypeXlrProfessional</b>,
<b>eJackConnTypeRJ11Modem</b>,
<b>eJackConnTypeCombination</b>
<br/>
}</td></tr>
<tr class="separator:a40b6ae7a53886196c59afe8b704695e1"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ae869986af2827bbd6257bca43d9a8188"><td class="memItemLeft" align="right" valign="top">enum  </td><td class="memItemRight" valign="bottom"><b>PaWasapiJackGeoLocation</b> { <br/>
  <b>eJackGeoLocUnk</b> = 0,
<b>eJackGeoLocRear</b> = 0x1,
<b>eJackGeoLocFront</b>,
<b>eJackGeoLocLeft</b>,
<br/>
  <b>eJackGeoLocRight</b>,
<b>eJackGeoLocTop</b>,
<b>eJackGeoLocBottom</b>,
<b>eJackGeoLocRearPanel</b>,
<br/>
  <b>eJackGeoLocRiser</b>,
<b>eJackGeoLocInsideMobileLid</b>,
<b>eJackGeoLocDrivebay</b>,
<b>eJackGeoLocHDMI</b>,
<br/>
  <b>eJackGeoLocOutsideMobileLid</b>,
<b>eJackGeoLocATAPI</b>,
<b>eJackGeoLocReserved5</b>,
<b>eJackGeoLocReserved6</b>
<br/>
}</td></tr>
<tr class="separator:ae869986af2827bbd6257bca43d9a8188"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ac205e0ea20ca795edcfd9f19135cf4cf"><td class="memItemLeft" align="right" valign="top">enum  </td><td class="memItemRight" valign="bottom"><b>PaWasapiJackGenLocation</b> { <b>eJackGenLocPrimaryBox</b> = 0,
<b>eJackGenLocInternal</b>,
<b>eJackGenLocSeparate</b>,
<b>eJackGenLocOther</b>
}</td></tr>
<tr class="separator:ac205e0ea20ca795edcfd9f19135cf4cf"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:aa4c63b1465e5de66f108facd3ddf893d"><td class="memItemLeft" align="right" valign="top">enum  </td><td class="memItemRight" valign="bottom"><b>PaWasapiJackPortConnection</b> { <b>eJackPortConnJack</b> = 0,
<b>eJackPortConnIntegratedDevice</b>,
<b>eJackPortConnBothIntegratedAndJack</b>,
<b>eJackPortConnUnknown</b>
}</td></tr>
<tr class="separator:aa4c63b1465e5de66f108facd3ddf893d"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a561291b0188f6f29246ea669b48e2661"><td class="memItemLeft" align="right" valign="top">enum  </td><td class="memItemRight" valign="bottom"><a class="el" href="pa__win__wasapi_8h.html#a561291b0188f6f29246ea669b48e2661">PaWasapiThreadPriority</a> { <br/>
  <b>eThreadPriorityNone</b> = 0,
<a class="el" href="pa__win__wasapi_8h.html#a561291b0188f6f29246ea669b48e2661a06c9f997fd5d9e11d4ef8bf67342f031">eThreadPriorityAudio</a>,
<b>eThreadPriorityCapture</b>,
<b>eThreadPriorityDistribution</b>,
<br/>
  <b>eThreadPriorityGames</b>,
<b>eThreadPriorityPlayback</b>,
<a class="el" href="pa__win__wasapi_8h.html#a561291b0188f6f29246ea669b48e2661a9a34413b0a045f4c44d10a49d3357187">eThreadPriorityProAudio</a>,
<b>eThreadPriorityWindowManager</b>
<br/>
}</td></tr>
<tr class="separator:a561291b0188f6f29246ea669b48e2661"><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:aa42c66da0ae19959d25a190e9dd82005"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="pa__win__wasapi_8h.html#aa42c66da0ae19959d25a190e9dd82005">PaWasapi_GetDeviceDefaultFormat</a> (void *pFormat, unsigned int nFormatSize, <a class="el" href="portaudio_8h.html#ad79317e65bde63d76c4b8e711ac5a361">PaDeviceIndex</a> nDevice)</td></tr>
<tr class="separator:aa42c66da0ae19959d25a190e9dd82005"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a6a8c5307dff661ae7ee0d7bb8bf73469"><td class="memItemLeft" align="right" valign="top">int </td><td class="memItemRight" valign="bottom"><a class="el" href="pa__win__wasapi_8h.html#a6a8c5307dff661ae7ee0d7bb8bf73469">PaWasapi_GetDeviceRole</a> (<a class="el" href="portaudio_8h.html#ad79317e65bde63d76c4b8e711ac5a361">PaDeviceIndex</a> nDevice)</td></tr>
<tr class="separator:a6a8c5307dff661ae7ee0d7bb8bf73469"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a2d48ae4d2124209ed8a6264c6febedc7"><td class="memItemLeft" align="right" valign="top"><a class="el" href="portaudio_8h.html#a4949e4a8ef9f9dbe8cbee414ce69841d">PaError</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="pa__win__wasapi_8h.html#a2d48ae4d2124209ed8a6264c6febedc7">PaWasapi_ThreadPriorityBoost</a> (void **hTask, <a class="el" href="pa__win__wasapi_8h.html#a561291b0188f6f29246ea669b48e2661">PaWasapiThreadPriority</a> nPriorityClass)</td></tr>
<tr class="separator:a2d48ae4d2124209ed8a6264c6febedc7"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ac5c875fb9165712ff696512f750f7de3"><td class="memItemLeft" align="right" valign="top"><a class="el" href="portaudio_8h.html#a4949e4a8ef9f9dbe8cbee414ce69841d">PaError</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="pa__win__wasapi_8h.html#ac5c875fb9165712ff696512f750f7de3">PaWasapi_ThreadPriorityRevert</a> (void *hTask)</td></tr>
<tr class="separator:ac5c875fb9165712ff696512f750f7de3"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:af8f04003c6123e6fdcfdf7308761a75e"><td class="memItemLeft" align="right" valign="top"><a class="el" href="portaudio_8h.html#a4949e4a8ef9f9dbe8cbee414ce69841d">PaError</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="pa__win__wasapi_8h.html#af8f04003c6123e6fdcfdf7308761a75e">PaWasapi_GetFramesPerHostBuffer</a> (<a class="el" href="portaudio_8h.html#a19874734f89958fccf86785490d53b4c">PaStream</a> *pStream, unsigned int *nInput, unsigned int *nOutput)</td></tr>
<tr class="separator:af8f04003c6123e6fdcfdf7308761a75e"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a46583f8e4b1132c198e2451fd48f7490"><td class="memItemLeft" align="right" valign="top"><a class="el" href="portaudio_8h.html#a4949e4a8ef9f9dbe8cbee414ce69841d">PaError</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="pa__win__wasapi_8h.html#a46583f8e4b1132c198e2451fd48f7490">PaWasapi_GetJackCount</a> (<a class="el" href="portaudio_8h.html#ad79317e65bde63d76c4b8e711ac5a361">PaDeviceIndex</a> nDevice, int *jcount)</td></tr>
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<tr class="memitem:a042829efac1aca1d77608d136a523465"><td class="memItemLeft" align="right" valign="top"><a class="el" href="portaudio_8h.html#a4949e4a8ef9f9dbe8cbee414ce69841d">PaError</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="pa__win__wasapi_8h.html#a042829efac1aca1d77608d136a523465">PaWasapi_GetJackDescription</a> (<a class="el" href="portaudio_8h.html#ad79317e65bde63d76c4b8e711ac5a361">PaDeviceIndex</a> nDevice, int jindex, <a class="el" href="structPaWasapiJackDescription.html">PaWasapiJackDescription</a> *pJackDescription)</td></tr>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><p>WASAPI-specific PortAudio API extension header file. </p>
<p>Definition in file <a class="el" href="pa__win__wasapi_8h_source.html">pa_win_wasapi.h</a>.</p>
</div><h2 class="groupheader">Enumeration Type Documentation</h2>
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<td class="memname">enum <a class="el" href="pa__win__wasapi_8h.html#a561291b0188f6f29246ea669b48e2661">PaWasapiThreadPriority</a></td>
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<tr><th colspan="2">Enumerator</th></tr><tr><td class="fieldname"><em><a class="anchor" id="a561291b0188f6f29246ea669b48e2661a06c9f997fd5d9e11d4ef8bf67342f031"></a>eThreadPriorityAudio</em> </td><td class="fielddoc">
<p>Default for Shared mode. </p>
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<tr><td class="fieldname"><em><a class="anchor" id="a561291b0188f6f29246ea669b48e2661a9a34413b0a045f4c44d10a49d3357187"></a>eThreadPriorityProAudio</em> </td><td class="fielddoc">
<p>Default for Exclusive mode. </p>
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<p>Definition at line <a class="el" href="pa__win__wasapi_8h_source.html#l00177">177</a> of file <a class="el" href="pa__win__wasapi_8h_source.html">pa_win_wasapi.h</a>.</p>
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<h2 class="groupheader">Function Documentation</h2>
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<td class="memname">int PaWasapi_GetDeviceDefaultFormat </td>
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<td class="paramtype">void * </td>
<td class="paramname"><em>pFormat</em>, </td>
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<td class="paramtype">unsigned int </td>
<td class="paramname"><em>nFormatSize</em>, </td>
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<td class="paramtype"><a class="el" href="portaudio_8h.html#ad79317e65bde63d76c4b8e711ac5a361">PaDeviceIndex</a> </td>
<td class="paramname"><em>nDevice</em> </td>
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<p>Returns default sound format for device. Format is represented by <a class="el" href="structPaWinWaveFormat.html">PaWinWaveFormat</a> or WAVEFORMATEXTENSIBLE structure.</p>
<dl class="params"><dt>Parameters</dt><dd>
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<tr><td class="paramname">pFormat</td><td>Pointer to <a class="el" href="structPaWinWaveFormat.html">PaWinWaveFormat</a> or WAVEFORMATEXTENSIBLE structure. </td></tr>
<tr><td class="paramname">nFormatSize</td><td>Size of <a class="el" href="structPaWinWaveFormat.html">PaWinWaveFormat</a> or WAVEFORMATEXTENSIBLE structure in bytes. </td></tr>
<tr><td class="paramname">nDevice</td><td>Device index.</td></tr>
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<dl class="section return"><dt>Returns</dt><dd>Non-negative value indicating the number of bytes copied into format decriptor or, a PaErrorCode (which are always negative) if PortAudio is not initialized or an error is encountered. </dd></dl>
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<td class="memname">int PaWasapi_GetDeviceRole </td>
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<td class="paramtype"><a class="el" href="portaudio_8h.html#ad79317e65bde63d76c4b8e711ac5a361">PaDeviceIndex</a> </td>
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<p>Returns device role (PaWasapiDeviceRole enum).</p>
<dl class="params"><dt>Parameters</dt><dd>
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<tr><td class="paramname">nDevice</td><td>device index.</td></tr>
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<dl class="section return"><dt>Returns</dt><dd>Non-negative value indicating device role or, a PaErrorCode (which are always negative) if PortAudio is not initialized or an error is encountered. </dd></dl>
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<td class="memname"><a class="el" href="portaudio_8h.html#a4949e4a8ef9f9dbe8cbee414ce69841d">PaError</a> PaWasapi_GetFramesPerHostBuffer </td>
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<td class="paramtype"><a class="el" href="portaudio_8h.html#a19874734f89958fccf86785490d53b4c">PaStream</a> * </td>
<td class="paramname"><em>pStream</em>, </td>
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<td class="paramtype">unsigned int * </td>
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<p>Get number of frames per host buffer. This is maximal value of frames of WASAPI buffer which can be locked for operations. Use this method as helper to findout maximal values of inputFrames/outputFrames of PaWasapiHostProcessorCallback.</p>
<dl class="params"><dt>Parameters</dt><dd>
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<tr><td class="paramname">pStream</td><td>Pointer to PaStream to query. </td></tr>
<tr><td class="paramname">nInput</td><td>Pointer to variable to receive number of input frames. Can be NULL. </td></tr>
<tr><td class="paramname">nOutput</td><td>Pointer to variable to receive number of output frames. Can be NULL. </td></tr>
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<dl class="section return"><dt>Returns</dt><dd>Error code indicating success or failure. </dd></dl>
<dl class="section see"><dt>See Also</dt><dd>PaWasapiHostProcessorCallback </dd></dl>
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<td class="memname"><a class="el" href="portaudio_8h.html#a4949e4a8ef9f9dbe8cbee414ce69841d">PaError</a> PaWasapi_GetJackCount </td>
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<td class="paramtype"><a class="el" href="portaudio_8h.html#ad79317e65bde63d76c4b8e711ac5a361">PaDeviceIndex</a> </td>
<td class="paramname"><em>nDevice</em>, </td>
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<td class="paramtype">int * </td>
<td class="paramname"><em>jcount</em> </td>
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<p>Get number of jacks associated with a WASAPI device. Use this method to determine if there are any jacks associated with the provided WASAPI device. Not all audio devices will support this capability. This is valid for both input and output devices. </p>
<dl class="params"><dt>Parameters</dt><dd>
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<tr><td class="paramname">nDevice</td><td>device index. </td></tr>
<tr><td class="paramname">jcount</td><td>Number of jacks is returned in this variable </td></tr>
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<dl class="section return"><dt>Returns</dt><dd>Error code indicating success or failure </dd></dl>
<dl class="section see"><dt>See Also</dt><dd><a class="el" href="pa__win__wasapi_8h.html#a042829efac1aca1d77608d136a523465">PaWasapi_GetJackDescription</a> </dd></dl>
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<td class="memname"><a class="el" href="portaudio_8h.html#a4949e4a8ef9f9dbe8cbee414ce69841d">PaError</a> PaWasapi_GetJackDescription </td>
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<td class="paramtype"><a class="el" href="portaudio_8h.html#ad79317e65bde63d76c4b8e711ac5a361">PaDeviceIndex</a> </td>
<td class="paramname"><em>nDevice</em>, </td>
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<td class="paramtype"><a class="el" href="structPaWasapiJackDescription.html">PaWasapiJackDescription</a> * </td>
<td class="paramname"><em>pJackDescription</em> </td>
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<p>Get the jack description associated with a WASAPI device and jack number Before this function is called, use PaWasapi_GetJackCount to determine the number of jacks associated with device. If jcount is greater than zero, then each jack from 0 to jcount can be queried with this function to get the jack description. </p>
<dl class="params"><dt>Parameters</dt><dd>
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<tr><td class="paramname">nDevice</td><td>device index. </td></tr>
<tr><td class="paramname">jindex</td><td>Which jack to return information </td></tr>
<tr><td class="paramname">KSJACK_DESCRIPTION</td><td>This structure filled in on success. </td></tr>
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<dl class="section return"><dt>Returns</dt><dd>Error code indicating success or failure </dd></dl>
<dl class="section see"><dt>See Also</dt><dd><a class="el" href="pa__win__wasapi_8h.html#a46583f8e4b1132c198e2451fd48f7490">PaWasapi_GetJackCount</a> </dd></dl>
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<td class="memname"><a class="el" href="portaudio_8h.html#a4949e4a8ef9f9dbe8cbee414ce69841d">PaError</a> PaWasapi_ThreadPriorityBoost </td>
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<p>Boost thread priority of calling thread (MMCSS). Use it for Blocking Interface only for thread which makes calls to Pa_WriteStream/Pa_ReadStream.</p>
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<tr><td class="paramname">hTask</td><td>Handle to pointer to priority task. Must be used with PaWasapi_RevertThreadPriority method to revert thread priority to initial state.</td></tr>
<tr><td class="paramname">nPriorityClass</td><td>Id of thread priority of PaWasapiThreadPriority type. Specifying eThreadPriorityNone does nothing.</td></tr>
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<dl class="section return"><dt>Returns</dt><dd>Error code indicating success or failure. </dd></dl>
<dl class="section see"><dt>See Also</dt><dd>PaWasapi_RevertThreadPriority </dd></dl>
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<td class="memname"><a class="el" href="portaudio_8h.html#a4949e4a8ef9f9dbe8cbee414ce69841d">PaError</a> PaWasapi_ThreadPriorityRevert </td>
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<p>Boost thread priority of calling thread (MMCSS). Use it for Blocking Interface only for thread which makes calls to Pa_WriteStream/Pa_ReadStream.</p>
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<tr><td class="paramname">hTask</td><td>Task handle obtained by PaWasapi_BoostThreadPriority method. </td></tr>
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<dl class="section return"><dt>Returns</dt><dd>Error code indicating success or failure. </dd></dl>
<dl class="section see"><dt>See Also</dt><dd>PaWasapi_BoostThreadPriority </dd></dl>
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