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1<html>
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3<head>
4<title>vorbis - datatype - ov_ectl_ratemanage_arg</title>
5<link rel=stylesheet href="style.css" type="text/css">
6</head>
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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>ov_ectl_ratemanage_arg</h1>
17
18<p><i>declared in "vorbis/vorbisenc.h"</i></p>
19
20<p>
21
22The ov_ectl_ratemanage_arg structure is used with <a
23href="vorbis_encode_ctl.html">vorbis_encode_ctl()</a> and the OV_ECTL_RATEMANAGE_GET,
24OV_ECTL_RATEMANAGE_SET, OV_ECTL_RATEMANAGE_AVG,
25OV_ECTL_RATEMANAGE_HARD calls in order to query and modify specifics
26of the encoder's bitrate management configuration.  Note that this is
27a deprecated interface; please use vorbis_encode_ctl() with the <a
28href="ov_ectl_ratemanage2_arg.html">ov_ectl_ratemanage2_arg</a> struct
29and OV_ECTL_RATEMANAGE2_GET and OV_ECTL_RATEMANAGE2_SET calls in new
30code.
31
32<p>
33
34<table border=0 width=100% color=black cellspacing=0 cellpadding=7>
35<tr bgcolor=#cccccc>
36        <td>
37<pre><b>struct ovectl_ratemanage_arg {
38  int    management_active;
39
40  long   bitrate_hard_min;
41  long   bitrate_hard_max;
42  double bitrate_hard_window;
43
44  long   bitrate_av_lo;
45  long   bitrate_av_hi;
46  double bitrate_av_window;
47  double bitrate_av_window_center;
48};</b></pre>
49        </td>
50</tr>
51</table>
52
53<h3>Relevant Struct Members</h3>
54<dl>
55
56<dt><i>management_active</i></dt>
57<dd>nonzero if bitrate management is active</dd>
58
59<dt><i>bitrate_hard_min</i></dt>
60<dd>hard lower limit (in kilobits per second) below which the stream bitrate will never be allowed for any given bitrate_hard_window seconds of time.</dd>
61<dt><i>bitrate_hard_max</i></dt>
62<dd>hard upper limit (in kilobits per second) above which the stream bitrate will never be allowed for any given bitrate_hard_window seconds of time.</dd>
63<dt><i>bitrate_hard_window</i></dt>
64<dd>the window period (in seconds) used to regulate the hard bitrate minimum and maximum</dd>
65
66<dt><i>bitrate_av_lo</i></dt>
67<dd>soft lower limit (in kilobits per second) below which the average bitrate tracker will start nudging the bitrate higher.</dd>
68<dt><i>bitrate_av_hi</i></dt>
69<dd>soft upper limit (in kilobits per second) above which the average bitrate tracker will start nudging the bitrate lower.</dd>
70<dt><i>bitrate_av_window</i></dt>
71<dd>the window period (in seconds) used to regulate the average bitrate minimum and maximum.</dd>
72<dt><i>bitrate_av_window_center</i></dt>
73<dd>Regulates the relative centering of the average and hard windows; in libvorbis 1.0 and 1.0.1, the hard window regulation overlapped but followed the average window regulation.  In libvorbis 1.1 a bit-reservoir interface replaces the old windowing interface; the older windowing interface is simulated and this field has no effect.</dd>
74
75</dl>
76
77
78<br><br>
79<hr noshade>
80<table border=0 width=100%>
81<tr valign=top>
82<td><p class=tiny>copyright &copy; 2004 vorbis team</p></td>
83<td align=right><p class=tiny><a href="http://www.xiph.org/ogg/vorbis/index.html">Ogg Vorbis</a><br><a href="mailto:team@vorbis.org">team@vorbis.org</a></p></td>
84</tr><tr>
85<td><p class=tiny>vorbisfile documentation</p></td>
86<td align=right><p class=tiny>libvorbisenc release 1.1 - 20040709</p></td>
87</tr>
88</table>
89
90</body>
91
92</html>
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