| [16] | 1 | <html> |
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| 3 | <head> |
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| 4 | <title>libvorbisenc - Documentation</title> |
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| 5 | <link rel=stylesheet href="style.css" type="text/css"> |
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| 6 | </head> |
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| 7 | |
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| 8 | <body bgcolor=white text=black link="#5555ff" alink="#5555ff" vlink="#5555ff"> |
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| 9 | <table border=0 width=100%> |
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| 10 | <tr> |
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| 11 | <td><p class=tiny>libvorbisenc documentation</p></td> |
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| 12 | <td align=right><p class=tiny>libvorbisenc release 1.1 - 20040709</p></td> |
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| 13 | </tr> |
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| 14 | </table> |
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| 15 | |
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| 16 | <h1>Libvorbisenc API changes 1.0 through 1.1</h1> |
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| 17 | |
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| 18 | This document describes API additions to libvorbisenc between release |
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| 19 | 1.0 and 1.1. |
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| 20 | |
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| 21 | <h2>1.0.1</h2> |
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| 22 | |
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| 23 | The programming API and binary application ABI are unchanged and fully |
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| 24 | forward/backward compatible between release 1.0 and 1.0.1. Libvorbis, |
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| 25 | libvorbisenc and libvorbisfile must match versions amongst themselves, |
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| 26 | however. |
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| 27 | |
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| 28 | <h2>1.1</h2> |
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| 29 | |
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| 30 | The binary ABI from release 1.0.1 to 1.1 is backward compatible; |
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| 31 | applications linked against libvorbis/libvorbisenc 1.0 and 1.0.1 will |
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| 32 | continue to function correctly when upgrading the libvorbis and |
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| 33 | libvorbisenc dynamic libraries without re-linking. <p> |
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| 34 | |
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| 35 | Release 1.1 adds several possible requests to the libvorbisenc <a |
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| 36 | href="vorbis_encode_ctl.html">vorbis_encode_ctl()</a> call in order to |
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| 37 | reflect the shift to <a href="overview.html#BBR">bit-reservoir style |
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| 38 | bitrate management</a>. In addition, several <a |
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| 39 | href="vorbis_encode_ctl.html">vorbis_encode_ctl()</a> requests are |
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| 40 | deprecated (but functional) as they are redered semantically obsolete |
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| 41 | by the <a href="overview.html#BBR">new bitrate management</a>.<p> |
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| 42 | |
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| 43 | <h3>Deprecated in 1.1</h3> |
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| 44 | |
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| 45 | These calls are still available to older codebases to preserve |
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| 46 | compatability; the fields of the <a |
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| 47 | href="ovectl_ratemanage_arg.html">ovectl_ratemanage_arg</a> argument |
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| 48 | are mapped as closely as possible to the fields of the new <a |
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| 49 | href="ovectl_ratemanage2_arg.html">ovectl_ratemanage2_arg</a> |
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| 50 | structure. |
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| 51 | |
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| 52 | <dl> |
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| 53 | <dt><a href="vorbis_encode_ctl.html#OV_ECTL_RATEMANAGE_GET">OV_ECTL_RATEMANAGE_GET</a>:<dd> Use <a |
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| 54 | href="vorbis_encode_ctl.html#OV_ECTL_RATEMANAGE2_GET">OV_ECTL_RATEMANAGE2_GET</a> |
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| 55 | instead. |
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| 56 | |
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| 57 | |
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| 58 | <dt><a href="vorbis_encode_ctl.html#OV_ECTL_RATEMANAGE_SET">OV_ECTL_RATEMANAGE_SET</a>:<dd> Use <a |
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| 59 | href="vorbis_encode_ctl.html#OV_ECTL_RATEMANAGE2_SET">OV_ECTL_RATEMANAGE2_SET</a> |
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| 60 | instead. |
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| 61 | |
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| 62 | <dt><a href="vorbis_encode_ctl.html#OV_ECTL_RATEMANAGE_AVG">OV_ECTL_RATEMANAGE_AVG</a>:<dd> Use <a |
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| 63 | href="vorbis_encode_ctl.html#OV_ECTL_RATEMANAGE2_SET">OV_ECTL_RATEMANAGE2_SET</a> |
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| 64 | instead. |
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| 65 | |
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| 66 | <dt><a href="vorbis_encode_ctl.html#OV_ECTL_RATEMANAGE_HARD">OV_ECTL_RATEMANAGE_HARD</a>:<dd> Use <a |
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| 67 | href="vorbis_encode_ctl.html#OV_ECTL_RATEMANAGE2_SET">OV_ECTL_RATEMANAGE2_SET</a> |
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| 68 | instead. |
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| 69 | </dl> |
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| 70 | |
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| 71 | <h3>Newly added in 1.1</h3> |
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| 72 | |
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| 73 | The following calls are added in 1.1 to semantically reflect movement |
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| 74 | to a <a href="overview.html#BBR">bit-reservoir-based bitrate |
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| 75 | management</a> scheme by introducing the <a |
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| 76 | href="ovectl_ratemanage2_arg.html">ovectl_ratemanage2_arg</a> |
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| 77 | structure in order to better represent the abilities of the bitrate |
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| 78 | manager.<p> |
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| 79 | |
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| 80 | <dl> |
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| 81 | <dt><a href="vorbis_encode_ctl.html#OV_ECTL_RATEMANAGE2_GET">OV_ECTL_RATEMANAGE2_GET</a><dd> |
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| 82 | |
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| 83 | Used to query the current state of bitrate management setup. |
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| 84 | |
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| 85 | <dt><a href="vorbis_encode_ctl.html#OV_ECTL_RATEMANAGE2_SET">OV_ECTL_RATEMANAGE2_SET</a><dd> |
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| 86 | |
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| 87 | Used to set or alter bitrate management settings. |
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| 88 | </dl> |
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| 89 | |
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| 90 | <br><br> |
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| 91 | <hr noshade> |
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| 92 | <table border=0 width=100%> |
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| 93 | <tr valign=top> |
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| 94 | <td><p class=tiny>copyright © 2000-2004 vorbis team</p></td> |
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| 95 | <td align=right><p class=tiny><a href="http://www.xiph.org/ogg/vorbis/">Ogg Vorbis</a><br><a href="mailto:team@vorbis.org">team@vorbis.org</a></p></td> |
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| 96 | </tr><tr> |
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| 97 | <td><p class=tiny>libvorbisenc documentation</p></td> |
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| 98 | <td align=right><p class=tiny>libvorbisenc release 1.1 - 20040709</p></td> |
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| 99 | </tr> |
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| 100 | </table> |
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| 101 | |
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| 102 | </body> |
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| 103 | |
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| 104 | </html> |
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