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git-svn-id: svn+ssh://svn.code.sf.net/p/wsjt/wsjt/trunk@189 ab8295b8-cf94-4d9e-aec4-7959e3be5d79
44 lines
1.6 KiB
HTML
44 lines
1.6 KiB
HTML
<!doctype html public "-//w3c//dtd html 4.0 transitional//en">
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<html>
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=iso-8859-1">
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<meta name="GENERATOR" content="Mozilla/4.73 [en]C-gatewaynet (Win98; U) [Netscape]">
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<meta name="Author" content="Phil Burk">
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<meta name="Description" content="Tutorial for PortAudio, a cross platform, open-source, audio I/O library.It provides a very simple API for recording and/or playing sound using a simple callback function.">
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<meta name="KeyWords" content="audio, tutorial, library, portable, open-source, DirectSound,sound, music, JSyn, synthesis,">
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<title>PortAudio Tutorial</title>
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</head>
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<body>
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<center><table COLS=1 WIDTH="100%" BGCOLOR="#FADA7A" >
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<tr>
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<td>
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<center>
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<h1>
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PortAudio Tutorial</h1></center>
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</td>
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</tr>
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</table></center>
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<h2>
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Initializing PortAudio</h2>
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<blockquote>Before making any other calls to PortAudio, you must call <tt>Pa_Initialize</tt>().
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This will trigger a scan of available devices which can be queried later.
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Like most PA functions, it will return a result of type <tt>paError</tt>.
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If the result is not <tt>paNoError</tt>, then an error has occurred.
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<blockquote>
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<pre>err = Pa_Initialize();
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if( err != paNoError ) goto error;</pre>
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</blockquote>
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You can get a text message that explains the error message by passing it
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to
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<blockquote>
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<pre>printf( "PortAudio error: %s\n", Pa_GetErrorText( err ) );</pre>
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</blockquote>
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</blockquote>
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<font size=+2><a href="http://www.portaudio.com/">home</a> | <a href="pa_tutorial.html">contents</a>
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| <a href="pa_tut_callback.html">previous</a> | <a href="pa_tut_open.html">next</a></font>
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</body>
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</html>
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