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