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1<html>
2
3<head>
4<title>libvorbisenc - Documentation</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>libvorbisenc documentation</p></td>
12<td align=right><p class=tiny>libvorbisenc release 1.1 - 20040709</p></td>
13</tr>
14</table>
15
16<h1>Libvorbisenc API changes 1.0  through 1.1</h1>
17
18This document describes API additions to libvorbisenc between release
191.0 and 1.1.
20
21<h2>1.0.1</h2> 
22
23The programming API and binary application ABI are unchanged and fully
24forward/backward compatible between release 1.0 and 1.0.1.  Libvorbis,
25libvorbisenc and libvorbisfile must match versions amongst themselves,
26however.
27
28<h2>1.1</h2>
29
30The binary ABI from release 1.0.1 to 1.1 is backward compatible;
31applications linked against libvorbis/libvorbisenc 1.0 and 1.0.1 will
32continue to function correctly when upgrading the libvorbis and
33libvorbisenc dynamic libraries without re-linking. <p>
34
35Release 1.1 adds several possible requests to the libvorbisenc <a
36href="vorbis_encode_ctl.html">vorbis_encode_ctl()</a> call in order to
37reflect the shift to <a href="overview.html#BBR">bit-reservoir style
38bitrate management</a>. In addition, several <a
39href="vorbis_encode_ctl.html">vorbis_encode_ctl()</a> requests are
40deprecated (but functional) as they are redered semantically obsolete
41by the <a href="overview.html#BBR">new bitrate management</a>.<p>
42
43<h3>Deprecated in 1.1</h3>
44
45These calls are still available to older codebases to preserve
46compatability; the fields of the <a
47href="ovectl_ratemanage_arg.html">ovectl_ratemanage_arg</a> argument
48are mapped as closely as possible to the fields of the new <a
49href="ovectl_ratemanage2_arg.html">ovectl_ratemanage2_arg</a>
50structure.
51
52<dl>
53<dt><a href="vorbis_encode_ctl.html#OV_ECTL_RATEMANAGE_GET">OV_ECTL_RATEMANAGE_GET</a>:<dd> Use <a
54href="vorbis_encode_ctl.html#OV_ECTL_RATEMANAGE2_GET">OV_ECTL_RATEMANAGE2_GET</a>
55instead. 
56
57
58<dt><a href="vorbis_encode_ctl.html#OV_ECTL_RATEMANAGE_SET">OV_ECTL_RATEMANAGE_SET</a>:<dd> Use <a
59href="vorbis_encode_ctl.html#OV_ECTL_RATEMANAGE2_SET">OV_ECTL_RATEMANAGE2_SET</a>
60instead.
61
62<dt><a href="vorbis_encode_ctl.html#OV_ECTL_RATEMANAGE_AVG">OV_ECTL_RATEMANAGE_AVG</a>:<dd> Use <a
63href="vorbis_encode_ctl.html#OV_ECTL_RATEMANAGE2_SET">OV_ECTL_RATEMANAGE2_SET</a>
64instead.
65
66<dt><a href="vorbis_encode_ctl.html#OV_ECTL_RATEMANAGE_HARD">OV_ECTL_RATEMANAGE_HARD</a>:<dd> Use <a
67href="vorbis_encode_ctl.html#OV_ECTL_RATEMANAGE2_SET">OV_ECTL_RATEMANAGE2_SET</a>
68instead.
69</dl>
70
71<h3>Newly added in 1.1</h3>
72
73The following calls are added in 1.1 to semantically reflect movement
74to a <a href="overview.html#BBR">bit-reservoir-based bitrate
75management</a> scheme by introducing the <a
76href="ovectl_ratemanage2_arg.html">ovectl_ratemanage2_arg</a>
77structure in order to better represent the abilities of the bitrate
78manager.<p>
79
80<dl>
81<dt><a href="vorbis_encode_ctl.html#OV_ECTL_RATEMANAGE2_GET">OV_ECTL_RATEMANAGE2_GET</a><dd>
82
83Used to query the current state of bitrate management setup.
84
85<dt><a href="vorbis_encode_ctl.html#OV_ECTL_RATEMANAGE2_SET">OV_ECTL_RATEMANAGE2_SET</a><dd>
86
87Used to set or alter bitrate management settings.
88</dl>
89
90<br><br>
91<hr noshade>
92<table border=0 width=100%>
93<tr valign=top>
94<td><p class=tiny>copyright &copy; 2000-2004 vorbis team</p></td>
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>
96</tr><tr>
97<td><p class=tiny>libvorbisenc documentation</p></td>
98<td align=right><p class=tiny>libvorbisenc release 1.1 - 20040709</p></td>
99</tr>
100</table>
101
102</body>
103
104</html>
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