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| 3 | <head>
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| 4 | <title>libvorbis - function - vorbis_analysis_buffer</title>
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| 5 | <link rel=stylesheet href="style.css" type="text/css">
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| 6 | </head>
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| 7 |
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| 8 | <body bgcolor=white text=black link="#5555ff" alink="#5555ff" vlink="#5555ff">
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| 9 | <table border=0 width=100%>
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| 10 | <tr>
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| 11 | <td><p class=tiny>libvorbis documentation</p></td>
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| 12 | <td align=right><p class=tiny>libvorbis version 1.3.2 - 20101101</p></td>
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| 13 | </tr>
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| 14 | </table>
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| 15 |
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| 16 | <h1>vorbis_analysis_buffer</h1>
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| 17 |
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| 18 | <p><i>declared in "vorbis/codec.h";</i></p>
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| 19 |
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| 20 | <p>This fuction requests a buffer array for delivering audio to the
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| 21 | encoder for compression.</p>
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| 22 |
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| 23 | <p>The Vorbis encoder expects the caller to write audio data as
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| 24 | non-interleaved floating point samples into its internal buffers.
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| 25 | </p>
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| 26 | <p>
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| 27 | The general procedure is to call this function with the number of samples
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| 28 | you have available. The encoder will arrange for that much internal storage
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| 29 | and return an array of buffer pointers, one for each channel of audio.
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| 30 | The caller must then write the audio samples into those buffers, as
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| 31 | float values, and finally call vorbis_analysis_wrote() to tell the
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| 32 | encoder the data is available for analysis.
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| 33 | </p>
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| 34 |
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| 35 | <table border=0 color=black cellspacing=0 cellpadding=7>
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| 36 | <tr bgcolor=#cccccc>
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| 37 | <td>
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| 38 | <pre><b>
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| 39 | extern float **vorbis_analysis_buffer(vorbis_dsp_state *v,int vals);
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| 40 | </b></pre>
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| 41 | </td>
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| 42 | </tr>
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| 43 | </table>
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| 44 |
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| 45 | <h3>Parameters</h3>
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| 46 | <dl>
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| 47 | <dt><i>v</i></dt>
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| 48 | <dd>Pointer to the vorbis_dsp_state representing the encoder.</dd>
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| 49 | <dt><i>vals</i></dt>
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| 50 | <dd>Number of samples to provide space for in the returned buffer. 1024 is a reasonable choice.</dd>
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| 51 | </dl>
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| 52 |
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| 53 |
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| 54 | <h3>Return Values</h3>
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| 55 | <p>Returns an array of floating point buffers which can accept data.
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| 56 | A (**float) where the first index is the channel, and the second is
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| 57 | the sample index.<p>
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| 58 |
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| 59 | <br><br>
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| 60 | <hr noshade>
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| 61 | <table border=0 width=100%>
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| 62 | <tr valign=top>
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| 63 | <td><p class=tiny>copyright © 2010 Xiph.Org</p></td>
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| 64 | <td align=right><p class=tiny><a href="https://xiph.org/vorbis/">Ogg Vorbis</a></p></td>
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| 65 | </tr><tr>
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| 66 | <td><p class=tiny>libvorbis documentation</p></td>
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| 67 | <td align=right><p class=tiny>libvorbis version 1.3.2 - 20101101</p></td>
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| 68 | </tr>
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| 69 | </table>
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| 70 |
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| 71 |
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| 72 | </body>
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| 73 |
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| 74 | </html>
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