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110 lines
3.4 KiB
HTML
110 lines
3.4 KiB
HTML
<html>
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<head>
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<title>Vorbisfile - function - ov_raw_seek_lap</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>Vorbisfile documentation</p></td>
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<td align=right><p class=tiny>vorbisfile version 1.3.2 - 20101101</p></td>
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</tr>
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</table>
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<h1>ov_raw_seek_lap</h1>
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<p><i>declared in "vorbis/vorbisfile.h";</i></p>
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<p>Seeks to the offset specified (in compressed raw bytes) within the
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physical bitstream. This variant of <a
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href="ov_raw_seek.html">ov_raw_seek</a> also automatically crosslaps
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the transition from the previous playback position into the new
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playback position in order to eliminate clicking and boundary
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discontinuities. Otherwise, usage and behavior is identical to <a
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href="ov_raw_seek.html">ov_raw_seek</a>.
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<p>When seek speed is a priority, but crosslapping is still desired,
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this is the best seek funtion to use.
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<p>ov_raw_seek_lap also updates everything needed within the decoder,
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so you can immediately call <a href="ov_read.html">ov_read()</a> and
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get data from the newly seeked to position.
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<p>ov_raw_seek_lap will lap between logical stream links of differing
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numbers of channels. Any extra channels from the origin of the seek
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are ignored; playback of these channels simply ends. Extra channels at
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the destination are lapped from silence. ov_raw_seek_lap will also
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lap between logical stream links of differing sample rates. In this
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case, the sample rates are ignored (no implicit resampling is done to
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match playback). It is up to the application developer to decide if
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this behavior makes any sense in a given context; in practical use,
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these default behaviors perform sensibly.
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<p>This function only works for seekable streams.
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<br><br>
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<table border=0 color=black cellspacing=0 cellpadding=7>
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<tr bgcolor=#cccccc>
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<td>
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<pre><b>
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int ov_raw_seek_lap(OggVorbis_File *vf,long pos);
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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>vf</i></dt>
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<dd>A pointer to the OggVorbis_File structure--this is used for ALL the externally visible libvorbisfile
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functions.</dd>
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<dt><i>pos</i></dt>
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<dd>Position in compressed bytes to seek to in the bitstream.</dd>
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</dl>
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<h3>Return Values</h3>
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<blockquote>
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<ul>
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<li>0 for success</li>
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<li>
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nonzero indicates failure, described by several error codes:
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<ul>
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<li>OV_ENOSEEK - Bitstream is not seekable.
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</li>
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<li>OV_EINVAL - Invalid argument value; possibly called with an OggVorbis_File structure that isn't open.
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</li>
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<li>OV_EREAD - A read from media returned an error.
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</li>
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<li>OV_EFAULT - Internal logic fault; indicates a bug or heap/stack
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corruption.
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</li>
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<li>OV_EOF - Indicates stream is at end of file immediately after a seek
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(making crosslap impossible as there's no preceeding decode state to crosslap).
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</li>
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<li>OV_EBADLINK - Invalid stream section supplied to libvorbisfile, or the requested link is corrupt.
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</li>
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</ul></li>
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</ul></blockquote>
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<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 © 2000-2010 Xiph.Org</p></td>
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<td align=right><p class=tiny><a href="http://www.xiph.org/ogg/vorbis/">Ogg Vorbis</a></p></td>
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</tr><tr>
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<td><p class=tiny>Vorbisfile documentation</p></td>
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<td align=right><p class=tiny>vorbisfile 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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