<!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"/> <meta http-equiv="X-UA-Compatible" content="IE=9"/> <meta name="generator" content="Doxygen 1.8.5"/> <title>NVIDIA 2D Image And Signal Performance Primitives (NPP): Count Zero Crossings</title> <link href="tabs.css" rel="stylesheet" type="text/css"/> <script type="text/javascript" src="jquery.js"></script> <script type="text/javascript" src="dynsections.js"></script> <link href="search/search.css" rel="stylesheet" type="text/css"/> <script type="text/javascript" src="search/search.js"></script> <script type="text/javascript"> $(document).ready(function() { searchBox.OnSelectItem(0); }); </script> <link href="doxygen.css" rel="stylesheet" type="text/css" /> </head> <body> <div id="top"><!-- do not remove this div, it is closed by doxygen! --> <div 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src="javascript:void(0)" frameborder="0" name="MSearchResults" id="MSearchResults"> </iframe> </div> <div class="header"> <div class="summary"> <a href="#func-members">Functions</a> </div> <div class="headertitle"> <div class="title">Count Zero Crossings<div class="ingroups"><a class="el" href="group__signal__statistical__functions.html">Statistical Functions</a></div></div> </div> </div><!--header--> <div class="contents"> <table class="memberdecls"> <tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="func-members"></a> Functions</h2></td></tr> <tr class="memitem:ga540c86b88b01f7e10ab4cb504bc1316f"><td class="memItemLeft" align="right" valign="top"><a class="el" href="group__typedefs__npp.html#ga1105a17b5e76381583c46ecd6a60fe21">NppStatus</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="group__signal__count__zero__crossings.html#ga540c86b88b01f7e10ab4cb504bc1316f">nppsZeroCrossingGetBufferSize_16s32f_Ctx</a> (int nLength, int *hpBufferSize, <a class="el" href="struct_npp_stream_context.html">NppStreamContext</a> nppStreamCtx)</td></tr> <tr class="memdesc:ga540c86b88b01f7e10ab4cb504bc1316f"><td class="mdescLeft"> </td><td class="mdescRight">Device-buffer size (in bytes) for nppsZeroCrossing_16s32f. <a href="#ga540c86b88b01f7e10ab4cb504bc1316f">More...</a><br/></td></tr> <tr class="separator:ga540c86b88b01f7e10ab4cb504bc1316f"><td class="memSeparator" colspan="2"> </td></tr> <tr class="memitem:ga85c9df909de366c0746bc3436e9b12d3"><td class="memItemLeft" align="right" valign="top"><a class="el" href="group__typedefs__npp.html#ga1105a17b5e76381583c46ecd6a60fe21">NppStatus</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="group__signal__count__zero__crossings.html#ga85c9df909de366c0746bc3436e9b12d3">nppsZeroCrossingGetBufferSize_16s32f</a> (int nLength, int *hpBufferSize)</td></tr> <tr class="separator:ga85c9df909de366c0746bc3436e9b12d3"><td class="memSeparator" colspan="2"> </td></tr> <tr class="memitem:ga2f960fa813c0a09b960d0f346a945ccd"><td class="memItemLeft" align="right" valign="top"><a class="el" href="group__typedefs__npp.html#ga1105a17b5e76381583c46ecd6a60fe21">NppStatus</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="group__signal__count__zero__crossings.html#ga2f960fa813c0a09b960d0f346a945ccd">nppsZeroCrossing_16s32f_Ctx</a> (const <a class="el" href="group__npp__basic__types.html#ga2eea681138ed3607f6a540f8a1c73b85">Npp16s</a> *pSrc, int nLength, <a class="el" href="group__npp__basic__types.html#ga274ed0e3c4cbc89f644143f64e2391ee">Npp32f</a> *pValZC, <a class="el" href="group__typedefs__npp.html#ga4f94f4a66597bb8d1e2ce697df4b8f88">NppsZCType</a> tZCType, <a class="el" href="group__npp__basic__types.html#ga29b502b6816fc0066fd59538483a5b62">Npp8u</a> *pDeviceBuffer, <a class="el" href="struct_npp_stream_context.html">NppStreamContext</a> nppStreamCtx)</td></tr> <tr class="memdesc:ga2f960fa813c0a09b960d0f346a945ccd"><td class="mdescLeft"> </td><td class="mdescRight">16-bit signed short integer zero crossing method, return value is 32-bit floating point. <a href="#ga2f960fa813c0a09b960d0f346a945ccd">More...</a><br/></td></tr> <tr class="separator:ga2f960fa813c0a09b960d0f346a945ccd"><td class="memSeparator" colspan="2"> </td></tr> <tr class="memitem:ga830790975e4662c36de89887450c99fe"><td class="memItemLeft" align="right" valign="top"><a class="el" href="group__typedefs__npp.html#ga1105a17b5e76381583c46ecd6a60fe21">NppStatus</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="group__signal__count__zero__crossings.html#ga830790975e4662c36de89887450c99fe">nppsZeroCrossing_16s32f</a> (const <a class="el" href="group__npp__basic__types.html#ga2eea681138ed3607f6a540f8a1c73b85">Npp16s</a> *pSrc, int nLength, <a class="el" href="group__npp__basic__types.html#ga274ed0e3c4cbc89f644143f64e2391ee">Npp32f</a> *pValZC, <a class="el" href="group__typedefs__npp.html#ga4f94f4a66597bb8d1e2ce697df4b8f88">NppsZCType</a> tZCType, <a class="el" href="group__npp__basic__types.html#ga29b502b6816fc0066fd59538483a5b62">Npp8u</a> *pDeviceBuffer)</td></tr> <tr class="separator:ga830790975e4662c36de89887450c99fe"><td class="memSeparator" colspan="2"> </td></tr> <tr class="memitem:ga7ef0c65ebfe162ffdc6d9bed27e4a1c0"><td class="memItemLeft" align="right" valign="top"><a class="el" href="group__typedefs__npp.html#ga1105a17b5e76381583c46ecd6a60fe21">NppStatus</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="group__signal__count__zero__crossings.html#ga7ef0c65ebfe162ffdc6d9bed27e4a1c0">nppsZeroCrossingGetBufferSize_32f_Ctx</a> (int nLength, int *hpBufferSize, <a class="el" href="struct_npp_stream_context.html">NppStreamContext</a> nppStreamCtx)</td></tr> <tr class="memdesc:ga7ef0c65ebfe162ffdc6d9bed27e4a1c0"><td class="mdescLeft"> </td><td class="mdescRight">Device-buffer size (in bytes) for nppsZeroCrossing_32f. <a href="#ga7ef0c65ebfe162ffdc6d9bed27e4a1c0">More...</a><br/></td></tr> <tr class="separator:ga7ef0c65ebfe162ffdc6d9bed27e4a1c0"><td class="memSeparator" colspan="2"> </td></tr> <tr class="memitem:ga3a4f8601764ff0ba2383ca23e2e79365"><td class="memItemLeft" align="right" valign="top"><a class="el" href="group__typedefs__npp.html#ga1105a17b5e76381583c46ecd6a60fe21">NppStatus</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="group__signal__count__zero__crossings.html#ga3a4f8601764ff0ba2383ca23e2e79365">nppsZeroCrossingGetBufferSize_32f</a> (int nLength, int *hpBufferSize)</td></tr> <tr class="separator:ga3a4f8601764ff0ba2383ca23e2e79365"><td class="memSeparator" colspan="2"> </td></tr> <tr class="memitem:ga22b38ecf27a6c3217e14e28ddd113709"><td class="memItemLeft" align="right" valign="top"><a class="el" href="group__typedefs__npp.html#ga1105a17b5e76381583c46ecd6a60fe21">NppStatus</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="group__signal__count__zero__crossings.html#ga22b38ecf27a6c3217e14e28ddd113709">nppsZeroCrossing_32f_Ctx</a> (const <a class="el" href="group__npp__basic__types.html#ga274ed0e3c4cbc89f644143f64e2391ee">Npp32f</a> *pSrc, int nLength, <a class="el" href="group__npp__basic__types.html#ga274ed0e3c4cbc89f644143f64e2391ee">Npp32f</a> *pValZC, <a class="el" href="group__typedefs__npp.html#ga4f94f4a66597bb8d1e2ce697df4b8f88">NppsZCType</a> tZCType, <a class="el" href="group__npp__basic__types.html#ga29b502b6816fc0066fd59538483a5b62">Npp8u</a> *pDeviceBuffer, <a class="el" href="struct_npp_stream_context.html">NppStreamContext</a> nppStreamCtx)</td></tr> <tr class="memdesc:ga22b38ecf27a6c3217e14e28ddd113709"><td class="mdescLeft"> </td><td class="mdescRight">32-bit floating-point zero crossing method, return value is 32-bit floating point. <a href="#ga22b38ecf27a6c3217e14e28ddd113709">More...</a><br/></td></tr> <tr class="separator:ga22b38ecf27a6c3217e14e28ddd113709"><td class="memSeparator" colspan="2"> </td></tr> <tr class="memitem:ga64c53c7d32f1cb1efc3d016b4e833119"><td class="memItemLeft" align="right" valign="top"><a class="el" href="group__typedefs__npp.html#ga1105a17b5e76381583c46ecd6a60fe21">NppStatus</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="group__signal__count__zero__crossings.html#ga64c53c7d32f1cb1efc3d016b4e833119">nppsZeroCrossing_32f</a> (const <a class="el" href="group__npp__basic__types.html#ga274ed0e3c4cbc89f644143f64e2391ee">Npp32f</a> *pSrc, int nLength, <a class="el" href="group__npp__basic__types.html#ga274ed0e3c4cbc89f644143f64e2391ee">Npp32f</a> *pValZC, <a class="el" href="group__typedefs__npp.html#ga4f94f4a66597bb8d1e2ce697df4b8f88">NppsZCType</a> tZCType, <a class="el" href="group__npp__basic__types.html#ga29b502b6816fc0066fd59538483a5b62">Npp8u</a> *pDeviceBuffer)</td></tr> <tr class="separator:ga64c53c7d32f1cb1efc3d016b4e833119"><td class="memSeparator" colspan="2"> </td></tr> </table> <a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2> <h2 class="groupheader">Function Documentation</h2> <a class="anchor" id="ga830790975e4662c36de89887450c99fe"></a> <div class="memitem"> <div class="memproto"> <table class="memname"> <tr> <td class="memname"><a class="el" href="group__typedefs__npp.html#ga1105a17b5e76381583c46ecd6a60fe21">NppStatus</a> nppsZeroCrossing_16s32f </td> <td>(</td> <td class="paramtype">const <a class="el" href="group__npp__basic__types.html#ga2eea681138ed3607f6a540f8a1c73b85">Npp16s</a> * </td> <td class="paramname"><em>pSrc</em>, </td> </tr> <tr> <td class="paramkey"></td> <td></td> <td class="paramtype">int </td> <td class="paramname"><em>nLength</em>, </td> </tr> <tr> <td class="paramkey"></td> <td></td> <td class="paramtype"><a class="el" href="group__npp__basic__types.html#ga274ed0e3c4cbc89f644143f64e2391ee">Npp32f</a> * </td> <td class="paramname"><em>pValZC</em>, </td> </tr> <tr> <td class="paramkey"></td> <td></td> <td class="paramtype"><a class="el" href="group__typedefs__npp.html#ga4f94f4a66597bb8d1e2ce697df4b8f88">NppsZCType</a> </td> <td class="paramname"><em>tZCType</em>, </td> </tr> <tr> <td class="paramkey"></td> <td></td> <td class="paramtype"><a class="el" href="group__npp__basic__types.html#ga29b502b6816fc0066fd59538483a5b62">Npp8u</a> * </td> <td class="paramname"><em>pDeviceBuffer</em> </td> </tr> <tr> <td></td> <td>)</td> <td></td><td></td> </tr> </table> </div><div class="memdoc"> </div> </div> <a class="anchor" id="ga2f960fa813c0a09b960d0f346a945ccd"></a> <div class="memitem"> <div class="memproto"> <table class="memname"> <tr> <td class="memname"><a class="el" href="group__typedefs__npp.html#ga1105a17b5e76381583c46ecd6a60fe21">NppStatus</a> nppsZeroCrossing_16s32f_Ctx </td> <td>(</td> <td class="paramtype">const <a class="el" href="group__npp__basic__types.html#ga2eea681138ed3607f6a540f8a1c73b85">Npp16s</a> * </td> <td class="paramname"><em>pSrc</em>, </td> </tr> <tr> <td class="paramkey"></td> <td></td> <td class="paramtype">int </td> <td class="paramname"><em>nLength</em>, </td> </tr> <tr> <td class="paramkey"></td> <td></td> <td class="paramtype"><a class="el" href="group__npp__basic__types.html#ga274ed0e3c4cbc89f644143f64e2391ee">Npp32f</a> * </td> <td class="paramname"><em>pValZC</em>, </td> </tr> <tr> <td class="paramkey"></td> <td></td> <td class="paramtype"><a class="el" href="group__typedefs__npp.html#ga4f94f4a66597bb8d1e2ce697df4b8f88">NppsZCType</a> </td> <td class="paramname"><em>tZCType</em>, </td> </tr> <tr> <td class="paramkey"></td> <td></td> <td class="paramtype"><a class="el" href="group__npp__basic__types.html#ga29b502b6816fc0066fd59538483a5b62">Npp8u</a> * </td> <td class="paramname"><em>pDeviceBuffer</em>, </td> </tr> <tr> <td class="paramkey"></td> <td></td> <td class="paramtype"><a class="el" href="struct_npp_stream_context.html">NppStreamContext</a> </td> <td class="paramname"><em>nppStreamCtx</em> </td> </tr> <tr> <td></td> <td>)</td> <td></td><td></td> </tr> </table> </div><div class="memdoc"> <p>16-bit signed short integer zero crossing method, return value is 32-bit floating point. </p> <dl class="params"><dt>Parameters</dt><dd> <table class="params"> <tr><td class="paramname">pSrc</td><td><a class="el" href="npps_conventions_lb.html#source_signal_pointer">Source Signal Pointer</a>. </td></tr> <tr><td class="paramname">nLength</td><td><a class="el" href="npps_conventions_lb.html#length_specification">Signal Length</a>. </td></tr> <tr><td class="paramname">pValZC</td><td>Pointer to the output result. </td></tr> <tr><td class="paramname">tZCType</td><td>Type of the zero crossing measure: nppZCR, nppZCXor or nppZCC. </td></tr> <tr><td class="paramname">pDeviceBuffer</td><td>Pointer to the required device memory allocation, <a class="el" href="general_conventions_lb.html#general_scratch_buffer">Scratch Buffer and Host Pointer</a>. Use <a class="el" href="group__signal__count__zero__crossings.html#ga85c9df909de366c0746bc3436e9b12d3">nppsZeroCrossingGetBufferSize_16s32f</a> to determine the minium number of bytes required. </td></tr> <tr><td class="paramname">nppStreamCtx</td><td><a class="el" href="index.html#application_managed_stream_context">Application Managed Stream Context</a>. </td></tr> </table> </dd> </dl> <dl class="section return"><dt>Returns</dt><dd><a class="el" href="npps_conventions_lb.html#signal_data_error_codes">Signal Data Related Error Codes</a>, <a class="el" href="npps_conventions_lb.html#length_error_codes">Length Related Error Codes</a>. </dd></dl> </div> </div> <a class="anchor" id="ga64c53c7d32f1cb1efc3d016b4e833119"></a> <div class="memitem"> <div class="memproto"> <table class="memname"> <tr> <td class="memname"><a class="el" href="group__typedefs__npp.html#ga1105a17b5e76381583c46ecd6a60fe21">NppStatus</a> nppsZeroCrossing_32f </td> <td>(</td> <td class="paramtype">const <a class="el" href="group__npp__basic__types.html#ga274ed0e3c4cbc89f644143f64e2391ee">Npp32f</a> * </td> <td class="paramname"><em>pSrc</em>, </td> </tr> <tr> <td class="paramkey"></td> <td></td> <td class="paramtype">int </td> <td class="paramname"><em>nLength</em>, </td> </tr> <tr> <td class="paramkey"></td> <td></td> <td class="paramtype"><a class="el" href="group__npp__basic__types.html#ga274ed0e3c4cbc89f644143f64e2391ee">Npp32f</a> * </td> <td class="paramname"><em>pValZC</em>, </td> </tr> <tr> <td class="paramkey"></td> <td></td> <td class="paramtype"><a class="el" href="group__typedefs__npp.html#ga4f94f4a66597bb8d1e2ce697df4b8f88">NppsZCType</a> </td> <td class="paramname"><em>tZCType</em>, </td> </tr> <tr> <td class="paramkey"></td> <td></td> <td class="paramtype"><a class="el" href="group__npp__basic__types.html#ga29b502b6816fc0066fd59538483a5b62">Npp8u</a> * </td> <td class="paramname"><em>pDeviceBuffer</em> </td> </tr> <tr> <td></td> <td>)</td> <td></td><td></td> </tr> </table> </div><div class="memdoc"> </div> </div> <a class="anchor" id="ga22b38ecf27a6c3217e14e28ddd113709"></a> <div class="memitem"> <div class="memproto"> <table class="memname"> <tr> <td class="memname"><a class="el" href="group__typedefs__npp.html#ga1105a17b5e76381583c46ecd6a60fe21">NppStatus</a> nppsZeroCrossing_32f_Ctx </td> <td>(</td> <td class="paramtype">const <a class="el" href="group__npp__basic__types.html#ga274ed0e3c4cbc89f644143f64e2391ee">Npp32f</a> * </td> <td class="paramname"><em>pSrc</em>, </td> </tr> <tr> <td class="paramkey"></td> <td></td> <td class="paramtype">int </td> <td class="paramname"><em>nLength</em>, </td> </tr> <tr> <td class="paramkey"></td> <td></td> <td class="paramtype"><a class="el" href="group__npp__basic__types.html#ga274ed0e3c4cbc89f644143f64e2391ee">Npp32f</a> * </td> <td class="paramname"><em>pValZC</em>, </td> </tr> <tr> <td class="paramkey"></td> <td></td> <td class="paramtype"><a class="el" href="group__typedefs__npp.html#ga4f94f4a66597bb8d1e2ce697df4b8f88">NppsZCType</a> </td> <td class="paramname"><em>tZCType</em>, </td> </tr> <tr> <td class="paramkey"></td> <td></td> <td class="paramtype"><a class="el" href="group__npp__basic__types.html#ga29b502b6816fc0066fd59538483a5b62">Npp8u</a> * </td> <td class="paramname"><em>pDeviceBuffer</em>, </td> </tr> <tr> <td class="paramkey"></td> <td></td> <td class="paramtype"><a class="el" href="struct_npp_stream_context.html">NppStreamContext</a> </td> <td class="paramname"><em>nppStreamCtx</em> </td> </tr> <tr> <td></td> <td>)</td> <td></td><td></td> </tr> </table> </div><div class="memdoc"> <p>32-bit floating-point zero crossing method, return value is 32-bit floating point. </p> <dl class="params"><dt>Parameters</dt><dd> <table class="params"> <tr><td class="paramname">pSrc</td><td><a class="el" href="npps_conventions_lb.html#source_signal_pointer">Source Signal Pointer</a>. </td></tr> <tr><td class="paramname">nLength</td><td><a class="el" href="npps_conventions_lb.html#length_specification">Signal Length</a>. </td></tr> <tr><td class="paramname">pValZC</td><td>Pointer to the output result. </td></tr> <tr><td class="paramname">tZCType</td><td>Type of the zero crossing measure: nppZCR, nppZCXor or nppZCC. </td></tr> <tr><td class="paramname">pDeviceBuffer</td><td>Pointer to the required device memory allocation, <a class="el" href="general_conventions_lb.html#general_scratch_buffer">Scratch Buffer and Host Pointer</a>. Use <a class="el" href="group__signal__count__zero__crossings.html#ga3a4f8601764ff0ba2383ca23e2e79365">nppsZeroCrossingGetBufferSize_32f</a> to determine the minium number of bytes required. </td></tr> <tr><td class="paramname">nppStreamCtx</td><td><a class="el" href="index.html#application_managed_stream_context">Application Managed Stream Context</a>. </td></tr> </table> </dd> </dl> <dl class="section return"><dt>Returns</dt><dd><a class="el" href="npps_conventions_lb.html#signal_data_error_codes">Signal Data Related Error Codes</a>, <a class="el" href="npps_conventions_lb.html#length_error_codes">Length Related Error Codes</a>. </dd></dl> </div> </div> <a class="anchor" id="ga85c9df909de366c0746bc3436e9b12d3"></a> <div class="memitem"> <div class="memproto"> <table class="memname"> <tr> <td class="memname"><a class="el" href="group__typedefs__npp.html#ga1105a17b5e76381583c46ecd6a60fe21">NppStatus</a> nppsZeroCrossingGetBufferSize_16s32f </td> <td>(</td> <td class="paramtype">int </td> <td class="paramname"><em>nLength</em>, </td> </tr> <tr> <td class="paramkey"></td> <td></td> <td class="paramtype">int * </td> <td class="paramname"><em>hpBufferSize</em> </td> </tr> <tr> <td></td> <td>)</td> <td></td><td></td> </tr> </table> </div><div class="memdoc"> </div> </div> <a class="anchor" id="ga540c86b88b01f7e10ab4cb504bc1316f"></a> <div class="memitem"> <div class="memproto"> <table class="memname"> <tr> <td class="memname"><a class="el" href="group__typedefs__npp.html#ga1105a17b5e76381583c46ecd6a60fe21">NppStatus</a> nppsZeroCrossingGetBufferSize_16s32f_Ctx </td> <td>(</td> <td class="paramtype">int </td> <td class="paramname"><em>nLength</em>, </td> </tr> <tr> <td class="paramkey"></td> <td></td> <td class="paramtype">int * </td> <td class="paramname"><em>hpBufferSize</em>, </td> </tr> <tr> <td class="paramkey"></td> <td></td> <td class="paramtype"><a class="el" href="struct_npp_stream_context.html">NppStreamContext</a> </td> <td class="paramname"><em>nppStreamCtx</em> </td> </tr> <tr> <td></td> <td>)</td> <td></td><td></td> </tr> </table> </div><div class="memdoc"> <p>Device-buffer size (in bytes) for nppsZeroCrossing_16s32f. </p> <dl class="params"><dt>Parameters</dt><dd> <table class="params"> <tr><td class="paramname">nLength</td><td><a class="el" href="npps_conventions_lb.html#length_specification">Signal Length</a>. </td></tr> <tr><td class="paramname">hpBufferSize</td><td>Required buffer size. Important: hpBufferSize is a <em>host pointer.</em> </td></tr> <tr><td class="paramname">nppStreamCtx</td><td><a class="el" href="index.html#application_managed_stream_context">Application Managed Stream Context</a>. </td></tr> </table> </dd> </dl> <dl class="section return"><dt>Returns</dt><dd>NPP_SUCCESS </dd></dl> </div> </div> <a class="anchor" id="ga3a4f8601764ff0ba2383ca23e2e79365"></a> <div class="memitem"> <div class="memproto"> <table class="memname"> <tr> <td class="memname"><a class="el" href="group__typedefs__npp.html#ga1105a17b5e76381583c46ecd6a60fe21">NppStatus</a> nppsZeroCrossingGetBufferSize_32f </td> <td>(</td> <td class="paramtype">int </td> <td class="paramname"><em>nLength</em>, </td> </tr> <tr> <td class="paramkey"></td> <td></td> <td class="paramtype">int * </td> <td class="paramname"><em>hpBufferSize</em> </td> </tr> <tr> <td></td> <td>)</td> <td></td><td></td> </tr> </table> </div><div class="memdoc"> </div> </div> <a class="anchor" id="ga7ef0c65ebfe162ffdc6d9bed27e4a1c0"></a> <div class="memitem"> <div class="memproto"> <table class="memname"> <tr> <td class="memname"><a class="el" href="group__typedefs__npp.html#ga1105a17b5e76381583c46ecd6a60fe21">NppStatus</a> nppsZeroCrossingGetBufferSize_32f_Ctx </td> <td>(</td> <td class="paramtype">int </td> <td class="paramname"><em>nLength</em>, </td> </tr> <tr> <td class="paramkey"></td> <td></td> <td class="paramtype">int * </td> <td class="paramname"><em>hpBufferSize</em>, </td> </tr> <tr> <td class="paramkey"></td> <td></td> <td class="paramtype"><a class="el" href="struct_npp_stream_context.html">NppStreamContext</a> </td> <td class="paramname"><em>nppStreamCtx</em> </td> </tr> <tr> <td></td> <td>)</td> <td></td><td></td> </tr> </table> </div><div class="memdoc"> <p>Device-buffer size (in bytes) for nppsZeroCrossing_32f. </p> <dl class="params"><dt>Parameters</dt><dd> <table class="params"> <tr><td class="paramname">nLength</td><td><a class="el" href="npps_conventions_lb.html#length_specification">Signal Length</a>. </td></tr> <tr><td class="paramname">hpBufferSize</td><td>Required buffer size. Important: hpBufferSize is a <em>host pointer.</em> </td></tr> <tr><td class="paramname">nppStreamCtx</td><td><a class="el" href="index.html#application_managed_stream_context">Application Managed Stream Context</a>. </td></tr> </table> </dd> </dl> <dl class="section return"><dt>Returns</dt><dd>NPP_SUCCESS </dd></dl> </div> </div> </div><!-- contents --> <HR> <center>Copyright © 2009-2019 NVIDIA Corporation</center> <HR>