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- <html>
- <head>
- <title>Tremor - Vorbisfile Differences</title>
- <link rel=stylesheet href="style.css" type="text/css">
- </head>
- <body bgcolor=white text=black link="#5555ff" alink="#5555ff" vlink="#5555ff">
- <table border=0 width=100%>
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- <td><p class=tiny>Tremor documentation</p></td>
- <td align=right><p class=tiny>Tremor version 1.0 - 20020403</p></td>
- </tr>
- </table>
- <h1>Tremor / Vorbisfile API Differences</h1>
- <p>
- The Tremor libvorbisidec library exposes an API intended to be as
- similar as possible to the familiar 'vorbisfile' library included with
- the open source Vorbis reference libraries distributed for free by
- Xiph.org. Differences are summarized below.<p>
- <h2>OggVorbis_File structure</h2>
- The <tt>bittrack</tt> and <tt>samptrack</tt> fields in the <a
- href="OggVorbis_File.html">OggVorbis_File</a> structure are changed to
- 64 bit integers in Tremor, from doubles in vorbisfile.
- <h2>Time-related seek and tell function calls</h2>
- The <a href="ov_time_total.html">ov_time_total()</a> and <a
- href="ov_time_tell.html">ov_time_tell()</a> functions return milliseconds as
- 64 bit integers in Tremor. In vorbisfile, these functions returned
- seconds as doubles.<p>
- In Tremor, the <a href="ov_time_seek.html">ov_time_seek()</a> and <a
- href="ov_time_seek_page.html">ov_time_seek_page()</a> calls take
- seeking positions in milliseconds as 64 bit integers, rather than in
- seconds as doubles as in Vorbisfile.<p>
- <h2>Reading decoded data</h2>
- Tremor <a href="ov_read.html">ov_read()</a> always returns data as
- signed 16 bit interleaved PCM in host byte order. As such, it does not
- take arguments to request specific signedness, byte order or bit depth
- as in Vorbisfile.<p>
- Tremor does not implement <tt>ov_read_float()</tt>.<p>
- <br><br>
- <hr noshade>
- <table border=0 width=100%>
- <tr valign=top>
- <td><p class=tiny>copyright © 2002 Xiph.org</p></td>
- <td align=right><p class=tiny><a href="http://www.xiph.org/ogg/vorbis/">Ogg Vorbis</a></p></td>
- </tr><tr>
- <td><p class=tiny>Tremor documentation</p></td>
- <td align=right><p class=tiny>Tremor version 1.0 - 20020403</p></td>
- </tr>
- </table>
- </body>
- </html>
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