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comparison src/libvorbis-1.3.3/doc/libvorbis/vorbis_analysis_buffer.html @ 86:98c1576536ae
Bring in flac, ogg, vorbis
| author | Chris Cannam <cannam@all-day-breakfast.com> |
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| date | Tue, 19 Mar 2013 17:37:49 +0000 |
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| 85:545efbb81310 | 86:98c1576536ae |
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| 1 <html> | |
| 2 | |
| 3 <head> | |
| 4 <title>libvorbis - function - vorbis_analysis_buffer</title> | |
| 5 <link rel=stylesheet href="style.css" type="text/css"> | |
| 6 </head> | |
| 7 | |
| 8 <body bgcolor=white text=black link="#5555ff" alink="#5555ff" vlink="#5555ff"> | |
| 9 <table border=0 width=100%> | |
| 10 <tr> | |
| 11 <td><p class=tiny>libvorbis documentation</p></td> | |
| 12 <td align=right><p class=tiny>libvorbis version 1.3.2 - 20101101</p></td> | |
| 13 </tr> | |
| 14 </table> | |
| 15 | |
| 16 <h1>vorbis_analysis_buffer</h1> | |
| 17 | |
| 18 <p><i>declared in "vorbis/codec.h";</i></p> | |
| 19 | |
| 20 <p>This fuction requests a buffer array for delivering audio to the | |
| 21 encoder for compression.</p> | |
| 22 | |
| 23 <p>The Vorbis encoder expects the caller to write audio data as | |
| 24 non-interleaved floating point samples into its internal buffers. | |
| 25 </p> | |
| 26 <p> | |
| 27 The general procedure is to call this function with the number of samples | |
| 28 you have available. The encoder will arrange for that much internal storage | |
| 29 and return an array of buffer pointers, one for each channel of audio. | |
| 30 The caller must then write the audio samples into those buffers, as | |
| 31 float values, and finally call vorbis_analysis_wrote() to tell the | |
| 32 encoder the data is available for analysis. | |
| 33 </p> | |
| 34 | |
| 35 <table border=0 color=black cellspacing=0 cellpadding=7> | |
| 36 <tr bgcolor=#cccccc> | |
| 37 <td> | |
| 38 <pre><b> | |
| 39 extern float **vorbis_analysis_buffer(vorbis_dsp_state *v,int vals); | |
| 40 </b></pre> | |
| 41 </td> | |
| 42 </tr> | |
| 43 </table> | |
| 44 | |
| 45 <h3>Parameters</h3> | |
| 46 <dl> | |
| 47 <dt><i>v</i></dt> | |
| 48 <dd>Pointer to the vorbis_dsp_state representing the encoder.</dd> | |
| 49 <dt><i>vals</i></dt> | |
| 50 <dd>Number of samples to provide space for in the returned buffer. 1024 is a reasonable choice.</dd> | |
| 51 </dl> | |
| 52 | |
| 53 | |
| 54 <h3>Return Values</h3> | |
| 55 <p>Returns an array of floating point buffers which can accept data. | |
| 56 A (**float) where the first index is the channel, and the second is | |
| 57 the sample index.<p> | |
| 58 | |
| 59 <br><br> | |
| 60 <hr noshade> | |
| 61 <table border=0 width=100%> | |
| 62 <tr valign=top> | |
| 63 <td><p class=tiny>copyright © 2010 Xiph.Org</p></td> | |
| 64 <td align=right><p class=tiny><a href="http://www.xiph.org/ogg/vorbis/index.html">Ogg Vorbis</a></p></td> | |
| 65 </tr><tr> | |
| 66 <td><p class=tiny>libvorbis documentation</p></td> | |
| 67 <td align=right><p class=tiny>libvorbis version 1.3.2 - 20101101</p></td> | |
| 68 </tr> | |
| 69 </table> | |
| 70 | |
| 71 | |
| 72 </body> | |
| 73 | |
| 74 </html> |