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1 <html>
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2
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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 version 1.3.2 - 20101101</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 © 2000-2010 Xiph.Org</p></td>
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95 <td align=right><p class=tiny><a href="http://www.xiph.org/ogg/vorbis/">Ogg Vorbis</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 version 1.3.2 - 20101101</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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