| 1 | <html>
|
|---|
| 2 |
|
|---|
| 3 | <head>
|
|---|
| 4 | <title>Vorbisfile - function - ov_pcm_seek_lap</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>Vorbisfile documentation</p></td>
|
|---|
| 12 | <td align=right><p class=tiny>vorbisfile version 1.3.2 - 20101101</p></td>
|
|---|
| 13 | </tr>
|
|---|
| 14 | </table>
|
|---|
| 15 |
|
|---|
| 16 | <h1>ov_pcm_seek_lap</h1>
|
|---|
| 17 |
|
|---|
| 18 | <p><i>declared in "vorbis/vorbisfile.h";</i></p>
|
|---|
| 19 |
|
|---|
| 20 | <p>Seeks to the offset specified (in pcm samples) within the physical bitstream. This variant of <a
|
|---|
| 21 | href="ov_pcm_seek.html">ov_pcm_seek</a> also automatically
|
|---|
| 22 | crosslaps the transition from the previous playback position into the
|
|---|
| 23 | new playback position in order to eliminate clicking and boundary
|
|---|
| 24 | discontinuities. Otherwise, usage and behavior is identical to <a
|
|---|
| 25 | href="ov_pcm_seek.html">ov_pcm_seek</a>.
|
|---|
| 26 |
|
|---|
| 27 | <p>ov_pcm_seek_lap also updates everything needed within the decoder,
|
|---|
| 28 | so you can immediately call <a href="ov_read.html">ov_read()</a> and
|
|---|
| 29 | get data from the newly seeked to position.
|
|---|
| 30 |
|
|---|
| 31 | <p>ov_pcm_seek_lap will lap between logical stream links of differing
|
|---|
| 32 | numbers of channels. Any extra channels from the origin of the seek
|
|---|
| 33 | are ignored; playback of these channels simply ends. Extra channels at
|
|---|
| 34 | the destination are lapped from silence. ov_pcm_seek_lap will also
|
|---|
| 35 | lap between logical stream links of differing sample rates. In this
|
|---|
| 36 | case, the sample rates are ignored (no implicit resampling is done to
|
|---|
| 37 | match playback). It is up to the application developer to decide if
|
|---|
| 38 | this behavior makes any sense in a given context; in practical use,
|
|---|
| 39 | these default behaviors perform sensibly.
|
|---|
| 40 |
|
|---|
| 41 | <p>This function only works for seekable streams.
|
|---|
| 42 |
|
|---|
| 43 | <br><br>
|
|---|
| 44 | <table border=0 color=black cellspacing=0 cellpadding=7>
|
|---|
| 45 | <tr bgcolor=#cccccc>
|
|---|
| 46 | <td>
|
|---|
| 47 | <pre><b>
|
|---|
| 48 | int ov_pcm_seek_lap(OggVorbis_File *vf,ogg_int64_t pos);
|
|---|
| 49 | </b></pre>
|
|---|
| 50 | </td>
|
|---|
| 51 | </tr>
|
|---|
| 52 | </table>
|
|---|
| 53 |
|
|---|
| 54 | <h3>Parameters</h3>
|
|---|
| 55 | <dl>
|
|---|
| 56 | <dt><i>vf</i></dt>
|
|---|
| 57 | <dd>A pointer to the OggVorbis_File structure--this is used for ALL the externally visible libvorbisfile
|
|---|
| 58 | functions.</dd>
|
|---|
| 59 | <dt><i>pos</i></dt>
|
|---|
| 60 | <dd>Position in pcm samples to seek to in the bitstream.</dd>
|
|---|
| 61 | </dl>
|
|---|
| 62 |
|
|---|
| 63 |
|
|---|
| 64 | <h3>Return Values</h3>
|
|---|
| 65 | <blockquote>
|
|---|
| 66 | <ul>
|
|---|
| 67 | <li>0 for success</li>
|
|---|
| 68 |
|
|---|
| 69 | <li>
|
|---|
| 70 | nonzero indicates failure, described by several error codes:
|
|---|
| 71 | <ul>
|
|---|
| 72 | <li>OV_ENOSEEK - Bitstream is not seekable.
|
|---|
| 73 | </li>
|
|---|
| 74 | <li>OV_EINVAL - Invalid argument value; possibly called with an OggVorbis_File structure that isn't open.
|
|---|
| 75 | </li>
|
|---|
| 76 | <li>OV_EREAD - A read from media returned an error.
|
|---|
| 77 | </li>
|
|---|
| 78 | <li>OV_EFAULT - Internal logic fault; indicates a bug or heap/stack
|
|---|
| 79 | corruption.
|
|---|
| 80 | </li>
|
|---|
| 81 | <li>OV_EOF - Indicates stream is at end of file immediately after a seek
|
|---|
| 82 | (making crosslap impossible as there's no preceeding decode state to crosslap).
|
|---|
| 83 | </li>
|
|---|
| 84 | <li>OV_EBADLINK - Invalid stream section supplied to libvorbisfile, or the requested link is corrupt.
|
|---|
| 85 | </li>
|
|---|
| 86 | </ul></li>
|
|---|
| 87 | </ul></blockquote>
|
|---|
| 88 |
|
|---|
| 89 | <br><br>
|
|---|
| 90 | <hr noshade>
|
|---|
| 91 | <table border=0 width=100%>
|
|---|
| 92 | <tr valign=top>
|
|---|
| 93 | <td><p class=tiny>copyright © 2000-2010 Xiph.Org</p></td>
|
|---|
| 94 | <td align=right><p class=tiny><a href="https://xiph.org/vorbis/">Ogg Vorbis</a></p></td>
|
|---|
| 95 | </tr><tr>
|
|---|
| 96 | <td><p class=tiny>Vorbisfile documentation</p></td>
|
|---|
| 97 | <td align=right><p class=tiny>vorbisfile version 1.3.2 - 20101101</p></td>
|
|---|
| 98 | </tr>
|
|---|
| 99 | </table>
|
|---|
| 100 |
|
|---|
| 101 | </body>
|
|---|
| 102 |
|
|---|
| 103 | </html>
|
|---|
