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74 lines
2.1 KiB
HTML
74 lines
2.1 KiB
HTML
<html>
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<title>libvorbis - function - vorbis_analysis_buffer</title>
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<link rel=stylesheet href="style.css" type="text/css">
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</head>
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<body bgcolor=white text=black link="#5555ff" alink="#5555ff" vlink="#5555ff">
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<table border=0 width=100%>
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<tr>
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<td><p class=tiny>libvorbis documentation</p></td>
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<td align=right><p class=tiny>libvorbis version 1.3.2 - 20101101</p></td>
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</table>
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<h1>vorbis_analysis_buffer</h1>
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<p><i>declared in "vorbis/codec.h";</i></p>
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<p>This fuction requests a buffer array for delivering audio to the
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encoder for compression.</p>
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<p>The Vorbis encoder expects the caller to write audio data as
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non-interleaved floating point samples into its internal buffers.
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</p>
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<p>
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The general procedure is to call this function with the number of samples
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you have available. The encoder will arrange for that much internal storage
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and return an array of buffer pointers, one for each channel of audio.
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The caller must then write the audio samples into those buffers, as
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float values, and finally call vorbis_analysis_wrote() to tell the
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encoder the data is available for analysis.
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</p>
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<table border=0 color=black cellspacing=0 cellpadding=7>
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<td>
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<pre><b>
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extern float **vorbis_analysis_buffer(vorbis_dsp_state *v,int vals);
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</b></pre>
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</td>
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</tr>
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</table>
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<h3>Parameters</h3>
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<dl>
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<dt><i>v</i></dt>
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<dd>Pointer to the vorbis_dsp_state representing the encoder.</dd>
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<dt><i>vals</i></dt>
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<dd>Number of samples to provide space for in the returned buffer. 1024 is a reasonable choice.</dd>
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</dl>
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<h3>Return Values</h3>
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<p>Returns an array of floating point buffers which can accept data.
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A (**float) where the first index is the channel, and the second is
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the sample index.<p>
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<br><br>
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<hr noshade>
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<table border=0 width=100%>
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<tr valign=top>
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<td><p class=tiny>copyright © 2010 Xiph.Org</p></td>
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<td align=right><p class=tiny><a href="http://www.xiph.org/ogg/vorbis/index.html">Ogg Vorbis</a></p></td>
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</tr><tr>
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<td><p class=tiny>libvorbis documentation</p></td>
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<td align=right><p class=tiny>libvorbis version 1.3.2 - 20101101</p></td>
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</tr>
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</table>
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</body>
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</html>
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