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<a href="downmix__info_8h.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">/*</span>
<a name="l00002"></a>00002 <span class="comment"> * Copyright (c) 2014 Tim Walker <tdskywalker@gmail.com></span>
<a name="l00003"></a>00003 <span class="comment"> *</span>
<a name="l00004"></a>00004 <span class="comment"> * This file is part of FFmpeg.</span>
<a name="l00005"></a>00005 <span class="comment"> *</span>
<a name="l00006"></a>00006 <span class="comment"> * FFmpeg is free software; you can redistribute it and/or</span>
<a name="l00007"></a>00007 <span class="comment"> * modify it under the terms of the GNU Lesser General Public</span>
<a name="l00008"></a>00008 <span class="comment"> * License as published by the Free Software Foundation; either</span>
<a name="l00009"></a>00009 <span class="comment"> * version 2.1 of the License, or (at your option) any later version.</span>
<a name="l00010"></a>00010 <span class="comment"> *</span>
<a name="l00011"></a>00011 <span class="comment"> * FFmpeg is distributed in the hope that it will be useful,</span>
<a name="l00012"></a>00012 <span class="comment"> * but WITHOUT ANY WARRANTY; without even the implied warranty of</span>
<a name="l00013"></a>00013 <span class="comment"> * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU</span>
<a name="l00014"></a>00014 <span class="comment"> * Lesser General Public License for more details.</span>
<a name="l00015"></a>00015 <span class="comment"> *</span>
<a name="l00016"></a>00016 <span class="comment"> * You should have received a copy of the GNU Lesser General Public</span>
<a name="l00017"></a>00017 <span class="comment"> * License along with FFmpeg; if not, write to the Free Software</span>
<a name="l00018"></a>00018 <span class="comment"> * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA</span>
<a name="l00019"></a>00019 <span class="comment"> */</span>
<a name="l00020"></a>00020
<a name="l00021"></a>00021 <span class="preprocessor">#ifndef AVUTIL_DOWNMIX_INFO_H</span>
<a name="l00022"></a>00022 <span class="preprocessor"></span><span class="preprocessor">#define AVUTIL_DOWNMIX_INFO_H</span>
<a name="l00023"></a>00023 <span class="preprocessor"></span>
<a name="l00024"></a>00024 <span class="preprocessor">#include "<a class="code" href="frame_8h.html" title="reference-counted frame API">frame.h</a>"</span>
<a name="l00025"></a>00025 <span class="comment"></span>
<a name="l00026"></a>00026 <span class="comment">/**</span>
<a name="l00027"></a>00027 <span class="comment"> * @file</span>
<a name="l00028"></a>00028 <span class="comment"> * audio downmix medatata</span>
<a name="l00029"></a>00029 <span class="comment"> */</span>
<a name="l00030"></a>00030 <span class="comment"></span>
<a name="l00031"></a>00031 <span class="comment">/**</span>
<a name="l00032"></a>00032 <span class="comment"> * @addtogroup lavu_audio</span>
<a name="l00033"></a>00033 <span class="comment"> * @{</span>
<a name="l00034"></a>00034 <span class="comment"> */</span>
<a name="l00035"></a>00035 <span class="comment"></span>
<a name="l00036"></a>00036 <span class="comment">/**</span>
<a name="l00037"></a>00037 <span class="comment"> * @defgroup downmix_info Audio downmix metadata</span>
<a name="l00038"></a>00038 <span class="comment"> * @{</span>
<a name="l00039"></a>00039 <span class="comment"> */</span>
<a name="l00040"></a>00040 <span class="comment"></span>
<a name="l00041"></a>00041 <span class="comment">/**</span>
<a name="l00042"></a>00042 <span class="comment"> * Possible downmix types.</span>
<a name="l00043"></a>00043 <span class="comment"> */</span>
<a name="l00044"></a><a class="code" href="group__downmix__info.html#ga3e3654fedbe3e5485f00ea09396c3521">00044</a> <span class="keyword">enum</span> <a class="code" href="group__downmix__info.html#ga3e3654fedbe3e5485f00ea09396c3521" title="Possible downmix types.">AVDownmixType</a> {
<a name="l00045"></a><a class="code" href="group__downmix__info.html#gga3e3654fedbe3e5485f00ea09396c3521a1184863af0dcd15f6851f2db10fa355c">00045</a> <a class="code" href="group__downmix__info.html#gga3e3654fedbe3e5485f00ea09396c3521a1184863af0dcd15f6851f2db10fa355c" title="Not indicated.">AV_DOWNMIX_TYPE_UNKNOWN</a>, <span class="comment">/**< Not indicated. */</span>
<a name="l00046"></a><a class="code" href="group__downmix__info.html#gga3e3654fedbe3e5485f00ea09396c3521a63e63739b6ea34a5ec073ad6ead25f8e">00046</a> <a class="code" href="group__downmix__info.html#gga3e3654fedbe3e5485f00ea09396c3521a63e63739b6ea34a5ec073ad6ead25f8e" title="Lo/Ro 2-channel downmix (Stereo).">AV_DOWNMIX_TYPE_LORO</a>, <span class="comment">/**< Lo/Ro 2-channel downmix (Stereo). */</span>
<a name="l00047"></a><a class="code" href="group__downmix__info.html#gga3e3654fedbe3e5485f00ea09396c3521a3737f8fe65fe8b805b256efa8d1328ef">00047</a> <a class="code" href="group__downmix__info.html#gga3e3654fedbe3e5485f00ea09396c3521a3737f8fe65fe8b805b256efa8d1328ef" title="Lt/Rt 2-channel downmix, Dolby Surround compatible.">AV_DOWNMIX_TYPE_LTRT</a>, <span class="comment">/**< Lt/Rt 2-channel downmix, Dolby Surround compatible. */</span>
<a name="l00048"></a><a class="code" href="group__downmix__info.html#gga3e3654fedbe3e5485f00ea09396c3521ac92fde94fbc0aa50b93071d995a36fca">00048</a> <a class="code" href="group__downmix__info.html#gga3e3654fedbe3e5485f00ea09396c3521ac92fde94fbc0aa50b93071d995a36fca" title="Lt/Rt 2-channel downmix, Dolby Pro Logic II compatible.">AV_DOWNMIX_TYPE_DPLII</a>, <span class="comment">/**< Lt/Rt 2-channel downmix, Dolby Pro Logic II compatible. */</span>
<a name="l00049"></a><a class="code" href="group__downmix__info.html#gga3e3654fedbe3e5485f00ea09396c3521ae8e1a1a755fccdddddbc9680694af182">00049</a> <a class="code" href="group__downmix__info.html#gga3e3654fedbe3e5485f00ea09396c3521ae8e1a1a755fccdddddbc9680694af182" title="Number of downmix types.">AV_DOWNMIX_TYPE_NB</a> <span class="comment">/**< Number of downmix types. Not part of ABI. */</span>
<a name="l00050"></a>00050 };
<a name="l00051"></a>00051 <span class="comment"></span>
<a name="l00052"></a>00052 <span class="comment">/**</span>
<a name="l00053"></a>00053 <span class="comment"> * This structure describes optional metadata relevant to a downmix procedure.</span>
<a name="l00054"></a>00054 <span class="comment"> *</span>
<a name="l00055"></a>00055 <span class="comment"> * All fields are set by the decoder to the value indicated in the audio</span>
<a name="l00056"></a>00056 <span class="comment"> * bitstream (if present), or to a "sane" default otherwise.</span>
<a name="l00057"></a>00057 <span class="comment"> */</span>
<a name="l00058"></a><a class="code" href="structAVDownmixInfo.html">00058</a> <span class="keyword">typedef</span> <span class="keyword">struct </span><a class="code" href="structAVDownmixInfo.html" title="This structure describes optional metadata relevant to a downmix procedure.">AVDownmixInfo</a> {<span class="comment"></span>
<a name="l00059"></a>00059 <span class="comment"> /**</span>
<a name="l00060"></a>00060 <span class="comment"> * Type of downmix preferred by the mastering engineer.</span>
<a name="l00061"></a>00061 <span class="comment"> */</span>
<a name="l00062"></a><a class="code" href="structAVDownmixInfo.html#aca0497b3d08ecb717c349c2bcc946038">00062</a> <span class="keyword">enum</span> <a class="code" href="group__downmix__info.html#ga3e3654fedbe3e5485f00ea09396c3521" title="Possible downmix types.">AVDownmixType</a> <a class="code" href="structAVDownmixInfo.html#aca0497b3d08ecb717c349c2bcc946038" title="Type of downmix preferred by the mastering engineer.">preferred_downmix_type</a>;
<a name="l00063"></a>00063 <span class="comment"></span>
<a name="l00064"></a>00064 <span class="comment"> /**</span>
<a name="l00065"></a>00065 <span class="comment"> * Absolute scale factor representing the nominal level of the center</span>
<a name="l00066"></a>00066 <span class="comment"> * channel during a regular downmix.</span>
<a name="l00067"></a>00067 <span class="comment"> */</span>
<a name="l00068"></a><a class="code" href="structAVDownmixInfo.html#ac895caaffbfe271f3b710453a5e4db52">00068</a> <span class="keywordtype">double</span> <a class="code" href="structAVDownmixInfo.html#ac895caaffbfe271f3b710453a5e4db52" title="Absolute scale factor representing the nominal level of the center channel during a regular downmix...">center_mix_level</a>;
<a name="l00069"></a>00069 <span class="comment"></span>
<a name="l00070"></a>00070 <span class="comment"> /**</span>
<a name="l00071"></a>00071 <span class="comment"> * Absolute scale factor representing the nominal level of the center</span>
<a name="l00072"></a>00072 <span class="comment"> * channel during an Lt/Rt compatible downmix.</span>
<a name="l00073"></a>00073 <span class="comment"> */</span>
<a name="l00074"></a><a class="code" href="structAVDownmixInfo.html#afe5bab2b99df66c400d53acef4e67ab7">00074</a> <span class="keywordtype">double</span> <a class="code" href="structAVDownmixInfo.html#afe5bab2b99df66c400d53acef4e67ab7" title="Absolute scale factor representing the nominal level of the center channel during an Lt/Rt compatible...">center_mix_level_ltrt</a>;
<a name="l00075"></a>00075 <span class="comment"></span>
<a name="l00076"></a>00076 <span class="comment"> /**</span>
<a name="l00077"></a>00077 <span class="comment"> * Absolute scale factor representing the nominal level of the surround</span>
<a name="l00078"></a>00078 <span class="comment"> * channels during a regular downmix.</span>
<a name="l00079"></a>00079 <span class="comment"> */</span>
<a name="l00080"></a><a class="code" href="structAVDownmixInfo.html#a763db6d7fd875324fff1c1cd124ac21f">00080</a> <span class="keywordtype">double</span> <a class="code" href="structAVDownmixInfo.html#a763db6d7fd875324fff1c1cd124ac21f" title="Absolute scale factor representing the nominal level of the surround channels during a regular downmi...">surround_mix_level</a>;
<a name="l00081"></a>00081 <span class="comment"></span>
<a name="l00082"></a>00082 <span class="comment"> /**</span>
<a name="l00083"></a>00083 <span class="comment"> * Absolute scale factor representing the nominal level of the surround</span>
<a name="l00084"></a>00084 <span class="comment"> * channels during an Lt/Rt compatible downmix.</span>
<a name="l00085"></a>00085 <span class="comment"> */</span>
<a name="l00086"></a><a class="code" href="structAVDownmixInfo.html#a460f7ab05d6c71112f2282aeb4009445">00086</a> <span class="keywordtype">double</span> <a class="code" href="structAVDownmixInfo.html#a460f7ab05d6c71112f2282aeb4009445" title="Absolute scale factor representing the nominal level of the surround channels during an Lt/Rt compati...">surround_mix_level_ltrt</a>;
<a name="l00087"></a>00087 <span class="comment"></span>
<a name="l00088"></a>00088 <span class="comment"> /**</span>
<a name="l00089"></a>00089 <span class="comment"> * Absolute scale factor representing the level at which the LFE data is</span>
<a name="l00090"></a>00090 <span class="comment"> * mixed into L/R channels during downmixing.</span>
<a name="l00091"></a>00091 <span class="comment"> */</span>
<a name="l00092"></a><a class="code" href="structAVDownmixInfo.html#a070b6f29f4a4d272894d60d678a13a03">00092</a> <span class="keywordtype">double</span> <a class="code" href="structAVDownmixInfo.html#a070b6f29f4a4d272894d60d678a13a03" title="Absolute scale factor representing the level at which the LFE data is mixed into L/R channels during ...">lfe_mix_level</a>;
<a name="l00093"></a>00093 } <a class="code" href="structAVDownmixInfo.html" title="This structure describes optional metadata relevant to a downmix procedure.">AVDownmixInfo</a>;
<a name="l00094"></a>00094 <span class="comment"></span>
<a name="l00095"></a>00095 <span class="comment">/**</span>
<a name="l00096"></a>00096 <span class="comment"> * Get a frame's AV_FRAME_DATA_DOWNMIX_INFO side data for editing.</span>
<a name="l00097"></a>00097 <span class="comment"> *</span>
<a name="l00098"></a>00098 <span class="comment"> * If the side data is absent, it is created and added to the frame.</span>
<a name="l00099"></a>00099 <span class="comment"> *</span>
<a name="l00100"></a>00100 <span class="comment"> * @param frame the frame for which the side data is to be obtained or created</span>
<a name="l00101"></a>00101 <span class="comment"> *</span>
<a name="l00102"></a>00102 <span class="comment"> * @return the AVDownmixInfo structure to be edited by the caller, or NULL if</span>
<a name="l00103"></a>00103 <span class="comment"> * the structure cannot be allocated.</span>
<a name="l00104"></a>00104 <span class="comment"> */</span>
<a name="l00105"></a>00105 <a class="code" href="structAVDownmixInfo.html" title="This structure describes optional metadata relevant to a downmix procedure.">AVDownmixInfo</a> *<a class="code" href="group__downmix__info.html#gadedd619e3fd3bb7732b917bfafba97a8" title="Get a frame's AV_FRAME_DATA_DOWNMIX_INFO side data for editing.">av_downmix_info_update_side_data</a>(<a class="code" href="structAVFrame.html" title="This structure describes decoded (raw) audio or video data.">AVFrame</a> *<a class="code" href="demuxing__decoding_8c.html#ad7d33d579a8d4241a5e643e39287a209">frame</a>);
<a name="l00106"></a>00106 <span class="comment"></span>
<a name="l00107"></a>00107 <span class="comment">/**</span>
<a name="l00108"></a>00108 <span class="comment"> * @}</span>
<a name="l00109"></a>00109 <span class="comment"> */</span>
<a name="l00110"></a>00110 <span class="comment"></span>
<a name="l00111"></a>00111 <span class="comment">/**</span>
<a name="l00112"></a>00112 <span class="comment"> * @}</span>
<a name="l00113"></a>00113 <span class="comment"> */</span>
<a name="l00114"></a>00114
<a name="l00115"></a>00115 <span class="preprocessor">#endif </span><span class="comment">/* AVUTIL_DOWNMIX_INFO_H */</span>
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