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67 lines
2.1 KiB
67 lines
2.1 KiB
<html>
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<head>
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<title>Tremor - Vorbisfile Differences</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>Tremor documentation</p></td>
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<td align=right><p class=tiny>Tremor version 1.0 - 20020403</p></td>
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</tr>
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</table>
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<h1>Tremor / Vorbisfile API Differences</h1>
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<p>
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The Tremor libvorbisidec library exposes an API intended to be as
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similar as possible to the familiar 'vorbisfile' library included with
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the open source Vorbis reference libraries distributed for free by
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Xiph.org. Differences are summarized below.<p>
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<h2>OggVorbis_File structure</h2>
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The <tt>bittrack</tt> and <tt>samptrack</tt> fields in the <a
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href="OggVorbis_File.html">OggVorbis_File</a> structure are changed to
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64 bit integers in Tremor, from doubles in vorbisfile.
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<h2>Time-related seek and tell function calls</h2>
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The <a href="ov_time_total.html">ov_time_total()</a> and <a
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href="ov_time_tell.html">ov_time_tell()</a> functions return milliseconds as
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64 bit integers in Tremor. In vorbisfile, these functions returned
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seconds as doubles.<p>
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In Tremor, the <a href="ov_time_seek.html">ov_time_seek()</a> and <a
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href="ov_time_seek_page.html">ov_time_seek_page()</a> calls take
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seeking positions in milliseconds as 64 bit integers, rather than in
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seconds as doubles as in Vorbisfile.<p>
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<h2>Reading decoded data</h2>
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Tremor <a href="ov_read.html">ov_read()</a> always returns data as
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signed 16 bit interleaved PCM in host byte order. As such, it does not
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take arguments to request specific signedness, byte order or bit depth
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as in Vorbisfile.<p>
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Tremor does not implement <tt>ov_read_float()</tt>.<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 © 2002 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>Tremor documentation</p></td>
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<td align=right><p class=tiny>Tremor version 1.0 - 20020403</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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