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<a href="avutil_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) 2006 Michael Niedermayer <michaelni@gmx.at></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_AVUTIL_H</span>
<a name="l00022"></a>00022 <span class="preprocessor"></span><span class="preprocessor">#define AVUTIL_AVUTIL_H</span>
<a name="l00023"></a>00023 <span class="preprocessor"></span><span class="comment"></span>
<a name="l00024"></a>00024 <span class="comment">/**</span>
<a name="l00025"></a>00025 <span class="comment"> * @file</span>
<a name="l00026"></a>00026 <span class="comment"> * external API header</span>
<a name="l00027"></a>00027 <span class="comment"> */</span>
<a name="l00028"></a>00028 <span class="comment"></span>
<a name="l00029"></a>00029 <span class="comment">/**</span>
<a name="l00030"></a>00030 <span class="comment"> * @mainpage</span>
<a name="l00031"></a>00031 <span class="comment"> *</span>
<a name="l00032"></a>00032 <span class="comment"> * @section ffmpeg_intro Introduction</span>
<a name="l00033"></a>00033 <span class="comment"> *</span>
<a name="l00034"></a>00034 <span class="comment"> * This document describes the usage of the different libraries</span>
<a name="l00035"></a>00035 <span class="comment"> * provided by FFmpeg.</span>
<a name="l00036"></a>00036 <span class="comment"> *</span>
<a name="l00037"></a>00037 <span class="comment"> * @li @ref libavc "libavcodec" encoding/decoding library</span>
<a name="l00038"></a>00038 <span class="comment"> * @li @ref lavfi "libavfilter" graph-based frame editing library</span>
<a name="l00039"></a>00039 <span class="comment"> * @li @ref libavf "libavformat" I/O and muxing/demuxing library</span>
<a name="l00040"></a>00040 <span class="comment"> * @li @ref lavd "libavdevice" special devices muxing/demuxing library</span>
<a name="l00041"></a>00041 <span class="comment"> * @li @ref lavu "libavutil" common utility library</span>
<a name="l00042"></a>00042 <span class="comment"> * @li @ref lswr "libswresample" audio resampling, format conversion and mixing</span>
<a name="l00043"></a>00043 <span class="comment"> * @li @ref lpp "libpostproc" post processing library</span>
<a name="l00044"></a>00044 <span class="comment"> * @li @ref libsws "libswscale" color conversion and scaling library</span>
<a name="l00045"></a>00045 <span class="comment"> *</span>
<a name="l00046"></a>00046 <span class="comment"> * @section ffmpeg_versioning Versioning and compatibility</span>
<a name="l00047"></a>00047 <span class="comment"> *</span>
<a name="l00048"></a>00048 <span class="comment"> * Each of the FFmpeg libraries contains a version.h header, which defines a</span>
<a name="l00049"></a>00049 <span class="comment"> * major, minor and micro version number with the</span>
<a name="l00050"></a>00050 <span class="comment"> * <em>LIBRARYNAME_VERSION_{MAJOR,MINOR,MICRO}</em> macros. The major version</span>
<a name="l00051"></a>00051 <span class="comment"> * number is incremented with backward incompatible changes - e.g. removing</span>
<a name="l00052"></a>00052 <span class="comment"> * parts of the public API, reordering public struct members, etc. The minor</span>
<a name="l00053"></a>00053 <span class="comment"> * version number is incremented for backward compatible API changes or major</span>
<a name="l00054"></a>00054 <span class="comment"> * new features - e.g. adding a new public function or a new decoder. The micro</span>
<a name="l00055"></a>00055 <span class="comment"> * version number is incremented for smaller changes that a calling program</span>
<a name="l00056"></a>00056 <span class="comment"> * might still want to check for - e.g. changing behavior in a previously</span>
<a name="l00057"></a>00057 <span class="comment"> * unspecified situation.</span>
<a name="l00058"></a>00058 <span class="comment"> *</span>
<a name="l00059"></a>00059 <span class="comment"> * FFmpeg guarantees backward API and ABI compatibility for each library as long</span>
<a name="l00060"></a>00060 <span class="comment"> * as its major version number is unchanged. This means that no public symbols</span>
<a name="l00061"></a>00061 <span class="comment"> * will be removed or renamed. Types and names of the public struct members and</span>
<a name="l00062"></a>00062 <span class="comment"> * values of public macros and enums will remain the same (unless they were</span>
<a name="l00063"></a>00063 <span class="comment"> * explicitly declared as not part of the public API). Documented behavior will</span>
<a name="l00064"></a>00064 <span class="comment"> * not change.</span>
<a name="l00065"></a>00065 <span class="comment"> *</span>
<a name="l00066"></a>00066 <span class="comment"> * In other words, any correct program that works with a given FFmpeg snapshot</span>
<a name="l00067"></a>00067 <span class="comment"> * should work just as well without any changes with any later snapshot with the</span>
<a name="l00068"></a>00068 <span class="comment"> * same major versions. This applies to both rebuilding the program against new</span>
<a name="l00069"></a>00069 <span class="comment"> * FFmpeg versions or to replacing the dynamic FFmpeg libraries that a program</span>
<a name="l00070"></a>00070 <span class="comment"> * links against.</span>
<a name="l00071"></a>00071 <span class="comment"> *</span>
<a name="l00072"></a>00072 <span class="comment"> * However, new public symbols may be added and new members may be appended to</span>
<a name="l00073"></a>00073 <span class="comment"> * public structs whose size is not part of public ABI (most public structs in</span>
<a name="l00074"></a>00074 <span class="comment"> * FFmpeg). New macros and enum values may be added. Behavior in undocumented</span>
<a name="l00075"></a>00075 <span class="comment"> * situations may change slightly (and be documented). All those are accompanied</span>
<a name="l00076"></a>00076 <span class="comment"> * by an entry in doc/APIchanges and incrementing either the minor or micro</span>
<a name="l00077"></a>00077 <span class="comment"> * version number.</span>
<a name="l00078"></a>00078 <span class="comment"> */</span>
<a name="l00079"></a>00079 <span class="comment"></span>
<a name="l00080"></a>00080 <span class="comment">/**</span>
<a name="l00081"></a>00081 <span class="comment"> * @defgroup lavu Common utility functions</span>
<a name="l00082"></a>00082 <span class="comment"> *</span>
<a name="l00083"></a>00083 <span class="comment"> * @brief</span>
<a name="l00084"></a>00084 <span class="comment"> * libavutil contains the code shared across all the other FFmpeg</span>
<a name="l00085"></a>00085 <span class="comment"> * libraries</span>
<a name="l00086"></a>00086 <span class="comment"> *</span>
<a name="l00087"></a>00087 <span class="comment"> * @note In order to use the functions provided by avutil you must include</span>
<a name="l00088"></a>00088 <span class="comment"> * the specific header.</span>
<a name="l00089"></a>00089 <span class="comment"> *</span>
<a name="l00090"></a>00090 <span class="comment"> * @{</span>
<a name="l00091"></a>00091 <span class="comment"> *</span>
<a name="l00092"></a>00092 <span class="comment"> * @defgroup lavu_crypto Crypto and Hashing</span>
<a name="l00093"></a>00093 <span class="comment"> *</span>
<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"> *</span>
<a name="l00097"></a>00097 <span class="comment"> * @defgroup lavu_math Maths</span>
<a name="l00098"></a>00098 <span class="comment"> * @{</span>
<a name="l00099"></a>00099 <span class="comment"> *</span>
<a name="l00100"></a>00100 <span class="comment"> * @}</span>
<a name="l00101"></a>00101 <span class="comment"> *</span>
<a name="l00102"></a>00102 <span class="comment"> * @defgroup lavu_string String Manipulation</span>
<a name="l00103"></a>00103 <span class="comment"> *</span>
<a name="l00104"></a>00104 <span class="comment"> * @{</span>
<a name="l00105"></a>00105 <span class="comment"> *</span>
<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"> * @defgroup lavu_mem Memory Management</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 <span class="comment"> * @defgroup lavu_data Data Structures</span>
<a name="l00115"></a>00115 <span class="comment"> * @{</span>
<a name="l00116"></a>00116 <span class="comment"> *</span>
<a name="l00117"></a>00117 <span class="comment"> * @}</span>
<a name="l00118"></a>00118 <span class="comment"> *</span>
<a name="l00119"></a>00119 <span class="comment"> * @defgroup lavu_audio Audio related</span>
<a name="l00120"></a>00120 <span class="comment"> *</span>
<a name="l00121"></a>00121 <span class="comment"> * @{</span>
<a name="l00122"></a>00122 <span class="comment"> *</span>
<a name="l00123"></a>00123 <span class="comment"> * @}</span>
<a name="l00124"></a>00124 <span class="comment"> *</span>
<a name="l00125"></a>00125 <span class="comment"> * @defgroup lavu_error Error Codes</span>
<a name="l00126"></a>00126 <span class="comment"> *</span>
<a name="l00127"></a>00127 <span class="comment"> * @{</span>
<a name="l00128"></a>00128 <span class="comment"> *</span>
<a name="l00129"></a>00129 <span class="comment"> * @}</span>
<a name="l00130"></a>00130 <span class="comment"> *</span>
<a name="l00131"></a>00131 <span class="comment"> * @defgroup lavu_log Logging Facility</span>
<a name="l00132"></a>00132 <span class="comment"> *</span>
<a name="l00133"></a>00133 <span class="comment"> * @{</span>
<a name="l00134"></a>00134 <span class="comment"> *</span>
<a name="l00135"></a>00135 <span class="comment"> * @}</span>
<a name="l00136"></a>00136 <span class="comment"> *</span>
<a name="l00137"></a>00137 <span class="comment"> * @defgroup lavu_misc Other</span>
<a name="l00138"></a>00138 <span class="comment"> *</span>
<a name="l00139"></a>00139 <span class="comment"> * @{</span>
<a name="l00140"></a>00140 <span class="comment"> *</span>
<a name="l00141"></a>00141 <span class="comment"> * @defgroup lavu_internal Internal</span>
<a name="l00142"></a>00142 <span class="comment"> *</span>
<a name="l00143"></a>00143 <span class="comment"> * Not exported functions, for internal usage only</span>
<a name="l00144"></a>00144 <span class="comment"> *</span>
<a name="l00145"></a>00145 <span class="comment"> * @{</span>
<a name="l00146"></a>00146 <span class="comment"> *</span>
<a name="l00147"></a>00147 <span class="comment"> * @}</span>
<a name="l00148"></a>00148 <span class="comment"> *</span>
<a name="l00149"></a>00149 <span class="comment"> * @defgroup preproc_misc Preprocessor String Macros</span>
<a name="l00150"></a>00150 <span class="comment"> *</span>
<a name="l00151"></a>00151 <span class="comment"> * @{</span>
<a name="l00152"></a>00152 <span class="comment"> *</span>
<a name="l00153"></a>00153 <span class="comment"> * @}</span>
<a name="l00154"></a>00154 <span class="comment"> *</span>
<a name="l00155"></a>00155 <span class="comment"> * @defgroup version_utils Library Version Macros</span>
<a name="l00156"></a>00156 <span class="comment"> *</span>
<a name="l00157"></a>00157 <span class="comment"> * @{</span>
<a name="l00158"></a>00158 <span class="comment"> *</span>
<a name="l00159"></a>00159 <span class="comment"> * @}</span>
<a name="l00160"></a>00160 <span class="comment"> */</span>
<a name="l00161"></a>00161
<a name="l00162"></a>00162 <span class="comment"></span>
<a name="l00163"></a>00163 <span class="comment">/**</span>
<a name="l00164"></a>00164 <span class="comment"> * @addtogroup lavu_ver</span>
<a name="l00165"></a>00165 <span class="comment"> * @{</span>
<a name="l00166"></a>00166 <span class="comment"> */</span>
<a name="l00167"></a>00167 <span class="comment"></span>
<a name="l00168"></a>00168 <span class="comment">/**</span>
<a name="l00169"></a>00169 <span class="comment"> * Return the LIBAVUTIL_VERSION_INT constant.</span>
<a name="l00170"></a>00170 <span class="comment"> */</span>
<a name="l00171"></a>00171 <span class="keywordtype">unsigned</span> <a class="code" href="group__lavu__ver.html#ga9a979c78d33d8767b51952f7f5c61541" title="Return the LIBAVUTIL_VERSION_INT constant.">avutil_version</a>(<span class="keywordtype">void</span>);
<a name="l00172"></a>00172 <span class="comment"></span>
<a name="l00173"></a>00173 <span class="comment">/**</span>
<a name="l00174"></a>00174 <span class="comment"> * Return the libavutil build-time configuration.</span>
<a name="l00175"></a>00175 <span class="comment"> */</span>
<a name="l00176"></a>00176 <span class="keyword">const</span> <span class="keywordtype">char</span> *<a class="code" href="group__lavu__ver.html#gaf75e78eac0a55a8c3736f89b018a5687" title="Return the libavutil build-time configuration.">avutil_configuration</a>(<span class="keywordtype">void</span>);
<a name="l00177"></a>00177 <span class="comment"></span>
<a name="l00178"></a>00178 <span class="comment">/**</span>
<a name="l00179"></a>00179 <span class="comment"> * Return the libavutil license.</span>
<a name="l00180"></a>00180 <span class="comment"> */</span>
<a name="l00181"></a>00181 <span class="keyword">const</span> <span class="keywordtype">char</span> *<a class="code" href="group__lavu__ver.html#ga88957e92f27b9d3fca0ec8cf43303b72" title="Return the libavutil license.">avutil_license</a>(<span class="keywordtype">void</span>);
<a name="l00182"></a>00182 <span class="comment"></span>
<a name="l00183"></a>00183 <span class="comment">/**</span>
<a name="l00184"></a>00184 <span class="comment"> * @}</span>
<a name="l00185"></a>00185 <span class="comment"> */</span>
<a name="l00186"></a>00186 <span class="comment"></span>
<a name="l00187"></a>00187 <span class="comment">/**</span>
<a name="l00188"></a>00188 <span class="comment"> * @addtogroup lavu_media Media Type</span>
<a name="l00189"></a>00189 <span class="comment"> * @brief Media Type</span>
<a name="l00190"></a>00190 <span class="comment"> */</span>
<a name="l00191"></a>00191
<a name="l00192"></a><a class="code" href="group__lavu__misc.html#ga9a84bba4713dfced21a1a56163be1f48">00192</a> <span class="keyword">enum</span> <a class="code" href="group__lavu__misc.html#ga9a84bba4713dfced21a1a56163be1f48">AVMediaType</a> {
<a name="l00193"></a><a class="code" href="group__lavu__misc.html#gga9a84bba4713dfced21a1a56163be1f48afdadbd6c4f612c59f6b6c7c6f84fd347">00193</a> <a class="code" href="group__lavu__misc.html#gga9a84bba4713dfced21a1a56163be1f48afdadbd6c4f612c59f6b6c7c6f84fd347" title="Usually treated as AVMEDIA_TYPE_DATA.">AVMEDIA_TYPE_UNKNOWN</a> = -1, <span class="comment">///< Usually treated as AVMEDIA_TYPE_DATA</span>
<a name="l00194"></a><a class="code" href="group__lavu__misc.html#gga9a84bba4713dfced21a1a56163be1f48ac1a46f59be5c6c2d3412ab172d6b8cf5">00194</a> <span class="comment"></span> <a class="code" href="group__lavu__misc.html#gga9a84bba4713dfced21a1a56163be1f48ac1a46f59be5c6c2d3412ab172d6b8cf5">AVMEDIA_TYPE_VIDEO</a>,
<a name="l00195"></a><a class="code" href="group__lavu__misc.html#gga9a84bba4713dfced21a1a56163be1f48a7b4e33b8f30ac94d34ce8d9f7c33927a">00195</a> <a class="code" href="group__lavu__misc.html#gga9a84bba4713dfced21a1a56163be1f48a7b4e33b8f30ac94d34ce8d9f7c33927a">AVMEDIA_TYPE_AUDIO</a>,
<a name="l00196"></a><a class="code" href="group__lavu__misc.html#gga9a84bba4713dfced21a1a56163be1f48ae3df4d77c6908fb626293c2fed215d52">00196</a> <a class="code" href="group__lavu__misc.html#gga9a84bba4713dfced21a1a56163be1f48ae3df4d77c6908fb626293c2fed215d52" title="Opaque data information usually continuous.">AVMEDIA_TYPE_DATA</a>, <span class="comment">///< Opaque data information usually continuous</span>
<a name="l00197"></a><a class="code" href="group__lavu__misc.html#gga9a84bba4713dfced21a1a56163be1f48aa64a67386a9c53360744b86e4707b831">00197</a> <span class="comment"></span> <a class="code" href="group__lavu__misc.html#gga9a84bba4713dfced21a1a56163be1f48aa64a67386a9c53360744b86e4707b831">AVMEDIA_TYPE_SUBTITLE</a>,
<a name="l00198"></a><a class="code" href="group__lavu__misc.html#gga9a84bba4713dfced21a1a56163be1f48a2d09f16df8631e64e8fa566142cdc99d">00198</a> <a class="code" href="group__lavu__misc.html#gga9a84bba4713dfced21a1a56163be1f48a2d09f16df8631e64e8fa566142cdc99d" title="Opaque data information usually sparse.">AVMEDIA_TYPE_ATTACHMENT</a>, <span class="comment">///< Opaque data information usually sparse</span>
<a name="l00199"></a><a class="code" href="group__lavu__misc.html#gga9a84bba4713dfced21a1a56163be1f48a8e220e09ef38f26963e8e2ec731fb7d9">00199</a> <span class="comment"></span> <a class="code" href="group__lavu__misc.html#gga9a84bba4713dfced21a1a56163be1f48a8e220e09ef38f26963e8e2ec731fb7d9">AVMEDIA_TYPE_NB</a>
<a name="l00200"></a>00200 };
<a name="l00201"></a>00201 <span class="comment"></span>
<a name="l00202"></a>00202 <span class="comment">/**</span>
<a name="l00203"></a>00203 <span class="comment"> * Return a string describing the media_type enum, NULL if media_type</span>
<a name="l00204"></a>00204 <span class="comment"> * is unknown.</span>
<a name="l00205"></a>00205 <span class="comment"> */</span>
<a name="l00206"></a>00206 <span class="keyword">const</span> <span class="keywordtype">char</span> *<a class="code" href="group__lavu__misc.html#gaf21645cfa855b2caf9699d7dc7b2d08e" title="Return a string describing the media_type enum, NULL if media_type is unknown.">av_get_media_type_string</a>(<span class="keyword">enum</span> <a class="code" href="group__lavu__misc.html#ga9a84bba4713dfced21a1a56163be1f48">AVMediaType</a> media_type);
<a name="l00207"></a>00207 <span class="comment"></span>
<a name="l00208"></a>00208 <span class="comment">/**</span>
<a name="l00209"></a>00209 <span class="comment"> * @defgroup lavu_const Constants</span>
<a name="l00210"></a>00210 <span class="comment"> * @{</span>
<a name="l00211"></a>00211 <span class="comment"> *</span>
<a name="l00212"></a>00212 <span class="comment"> * @defgroup lavu_enc Encoding specific</span>
<a name="l00213"></a>00213 <span class="comment"> *</span>
<a name="l00214"></a>00214 <span class="comment"> * @note those definition should move to avcodec</span>
<a name="l00215"></a>00215 <span class="comment"> * @{</span>
<a name="l00216"></a>00216 <span class="comment"> */</span>
<a name="l00217"></a>00217
<a name="l00218"></a><a class="code" href="group__lavu__enc.html#ga979d8e4b4947c924436fcc3b62cafea7">00218</a> <span class="preprocessor">#define FF_LAMBDA_SHIFT 7</span>
<a name="l00219"></a><a class="code" href="group__lavu__enc.html#ga44d4d51371d07ef43eb009ef29a0b534">00219</a> <span class="preprocessor"></span><span class="preprocessor">#define FF_LAMBDA_SCALE (1<<FF_LAMBDA_SHIFT)</span>
<a name="l00220"></a><a class="code" href="group__lavu__enc.html#gad6ce86405f7381daad36ccf516b4da98">00220</a> <span class="preprocessor"></span><span class="preprocessor">#define FF_QP2LAMBDA 118 ///< factor to convert from H.263 QP to lambda</span>
<a name="l00221"></a><a class="code" href="group__lavu__enc.html#gabc22a7ffbd4a73e81dd69e8c45e6cf8c">00221</a> <span class="preprocessor"></span><span class="preprocessor">#define FF_LAMBDA_MAX (256*128-1)</span>
<a name="l00222"></a>00222 <span class="preprocessor"></span>
<a name="l00223"></a><a class="code" href="group__lavu__enc.html#gab1026a3e2eb8430ec938fffdc1bb2238">00223</a> <span class="preprocessor">#define FF_QUALITY_SCALE FF_LAMBDA_SCALE //FIXME maybe remove</span>
<a name="l00224"></a>00224 <span class="preprocessor"></span><span class="comment"></span>
<a name="l00225"></a>00225 <span class="comment">/**</span>
<a name="l00226"></a>00226 <span class="comment"> * @}</span>
<a name="l00227"></a>00227 <span class="comment"> * @defgroup lavu_time Timestamp specific</span>
<a name="l00228"></a>00228 <span class="comment"> *</span>
<a name="l00229"></a>00229 <span class="comment"> * FFmpeg internal timebase and timestamp definitions</span>
<a name="l00230"></a>00230 <span class="comment"> *</span>
<a name="l00231"></a>00231 <span class="comment"> * @{</span>
<a name="l00232"></a>00232 <span class="comment"> */</span>
<a name="l00233"></a>00233 <span class="comment"></span>
<a name="l00234"></a>00234 <span class="comment">/**</span>
<a name="l00235"></a>00235 <span class="comment"> * @brief Undefined timestamp value</span>
<a name="l00236"></a>00236 <span class="comment"> *</span>
<a name="l00237"></a>00237 <span class="comment"> * Usually reported by demuxer that work on containers that do not provide</span>
<a name="l00238"></a>00238 <span class="comment"> * either pts or dts.</span>
<a name="l00239"></a>00239 <span class="comment"> */</span>
<a name="l00240"></a>00240
<a name="l00241"></a><a class="code" href="group__lavu__time.html#ga2eaefe702f95f619ea6f2d08afa01be1">00241</a> <span class="preprocessor">#define AV_NOPTS_VALUE ((int64_t)UINT64_C(0x8000000000000000))</span>
<a name="l00242"></a>00242 <span class="preprocessor"></span><span class="comment"></span>
<a name="l00243"></a>00243 <span class="comment">/**</span>
<a name="l00244"></a>00244 <span class="comment"> * Internal time base represented as integer</span>
<a name="l00245"></a>00245 <span class="comment"> */</span>
<a name="l00246"></a>00246
<a name="l00247"></a><a class="code" href="group__lavu__time.html#gaa11ed202b70e1f52bac809811a910e2a">00247</a> <span class="preprocessor">#define AV_TIME_BASE 1000000</span>
<a name="l00248"></a>00248 <span class="preprocessor"></span><span class="comment"></span>
<a name="l00249"></a>00249 <span class="comment">/**</span>
<a name="l00250"></a>00250 <span class="comment"> * Internal time base represented as fractional value</span>
<a name="l00251"></a>00251 <span class="comment"> */</span>
<a name="l00252"></a>00252
<a name="l00253"></a><a class="code" href="group__lavu__time.html#gafd07a13a4ddaa6015275cad6022d9ee3">00253</a> <span class="preprocessor">#define AV_TIME_BASE_Q (AVRational){1, AV_TIME_BASE}</span>
<a name="l00254"></a>00254 <span class="preprocessor"></span><span class="comment"></span>
<a name="l00255"></a>00255 <span class="comment">/**</span>
<a name="l00256"></a>00256 <span class="comment"> * @}</span>
<a name="l00257"></a>00257 <span class="comment"> * @}</span>
<a name="l00258"></a>00258 <span class="comment"> * @defgroup lavu_picture Image related</span>
<a name="l00259"></a>00259 <span class="comment"> *</span>
<a name="l00260"></a>00260 <span class="comment"> * AVPicture types, pixel formats and basic image planes manipulation.</span>
<a name="l00261"></a>00261 <span class="comment"> *</span>
<a name="l00262"></a>00262 <span class="comment"> * @{</span>
<a name="l00263"></a>00263 <span class="comment"> */</span>
<a name="l00264"></a>00264
<a name="l00265"></a><a class="code" href="group__lavu__picture.html#gae6cbcab1f70d8e476757f1c1f5a0a78e">00265</a> <span class="keyword">enum</span> <a class="code" href="group__lavu__picture.html#gae6cbcab1f70d8e476757f1c1f5a0a78e">AVPictureType</a> {
<a name="l00266"></a><a class="code" href="group__lavu__picture.html#ggae6cbcab1f70d8e476757f1c1f5a0a78ea33183189d771e3325ccdd36fa980b6f6">00266</a> <a class="code" href="group__lavu__picture.html#ggae6cbcab1f70d8e476757f1c1f5a0a78ea33183189d771e3325ccdd36fa980b6f6" title="Undefined.">AV_PICTURE_TYPE_NONE</a> = 0, <span class="comment">///< Undefined</span>
<a name="l00267"></a><a class="code" href="group__lavu__picture.html#ggae6cbcab1f70d8e476757f1c1f5a0a78ea02be39f151a8ace7a65c86e13053e817">00267</a> <span class="comment"></span> <a class="code" href="group__lavu__picture.html#ggae6cbcab1f70d8e476757f1c1f5a0a78ea02be39f151a8ace7a65c86e13053e817" title="Intra.">AV_PICTURE_TYPE_I</a>, <span class="comment">///< Intra</span>
<a name="l00268"></a><a class="code" href="group__lavu__picture.html#ggae6cbcab1f70d8e476757f1c1f5a0a78eaa6fc0479507a03f173f07fc75dab2193">00268</a> <span class="comment"></span> <a class="code" href="group__lavu__picture.html#ggae6cbcab1f70d8e476757f1c1f5a0a78eaa6fc0479507a03f173f07fc75dab2193" title="Predicted.">AV_PICTURE_TYPE_P</a>, <span class="comment">///< Predicted</span>
<a name="l00269"></a><a class="code" href="group__lavu__picture.html#ggae6cbcab1f70d8e476757f1c1f5a0a78ead22f8968e99bc48897c3f4ac29e82dae">00269</a> <span class="comment"></span> <a class="code" href="group__lavu__picture.html#ggae6cbcab1f70d8e476757f1c1f5a0a78ead22f8968e99bc48897c3f4ac29e82dae" title="Bi-dir predicted.">AV_PICTURE_TYPE_B</a>, <span class="comment">///< Bi-dir predicted</span>
<a name="l00270"></a><a class="code" href="group__lavu__picture.html#ggae6cbcab1f70d8e476757f1c1f5a0a78eac279237c3b09bb9f7ece0675658e65ad">00270</a> <span class="comment"></span> <a class="code" href="group__lavu__picture.html#ggae6cbcab1f70d8e476757f1c1f5a0a78eac279237c3b09bb9f7ece0675658e65ad" title="S(GMC)-VOP MPEG4.">AV_PICTURE_TYPE_S</a>, <span class="comment">///< S(GMC)-VOP MPEG4</span>
<a name="l00271"></a><a class="code" href="group__lavu__picture.html#ggae6cbcab1f70d8e476757f1c1f5a0a78eaa7199b8035cf5a076a05a7fcf6dfc7fe">00271</a> <span class="comment"></span> <a class="code" href="group__lavu__picture.html#ggae6cbcab1f70d8e476757f1c1f5a0a78eaa7199b8035cf5a076a05a7fcf6dfc7fe" title="Switching Intra.">AV_PICTURE_TYPE_SI</a>, <span class="comment">///< Switching Intra</span>
<a name="l00272"></a><a class="code" href="group__lavu__picture.html#ggae6cbcab1f70d8e476757f1c1f5a0a78ea83789bae2515a1ce384a88f074244e4e">00272</a> <span class="comment"></span> <a class="code" href="group__lavu__picture.html#ggae6cbcab1f70d8e476757f1c1f5a0a78ea83789bae2515a1ce384a88f074244e4e" title="Switching Predicted.">AV_PICTURE_TYPE_SP</a>, <span class="comment">///< Switching Predicted</span>
<a name="l00273"></a><a class="code" href="group__lavu__picture.html#ggae6cbcab1f70d8e476757f1c1f5a0a78ea71f9f194b0cbe86778cb6df41b867cf3">00273</a> <span class="comment"></span> <a class="code" href="group__lavu__picture.html#ggae6cbcab1f70d8e476757f1c1f5a0a78ea71f9f194b0cbe86778cb6df41b867cf3" title="BI type.">AV_PICTURE_TYPE_BI</a>, <span class="comment">///< BI type</span>
<a name="l00274"></a>00274 <span class="comment"></span>};
<a name="l00275"></a>00275 <span class="comment"></span>
<a name="l00276"></a>00276 <span class="comment">/**</span>
<a name="l00277"></a>00277 <span class="comment"> * Return a single letter to describe the given picture type</span>
<a name="l00278"></a>00278 <span class="comment"> * pict_type.</span>
<a name="l00279"></a>00279 <span class="comment"> *</span>
<a name="l00280"></a>00280 <span class="comment"> * @param[in] pict_type the picture type @return a single character</span>
<a name="l00281"></a>00281 <span class="comment"> * representing the picture type, '?' if pict_type is unknown</span>
<a name="l00282"></a>00282 <span class="comment"> */</span>
<a name="l00283"></a>00283 <span class="keywordtype">char</span> <a class="code" href="group__lavu__picture.html#gacbf2ea8b2b89924c890ef8ec10a3d922" title="Return a single letter to describe the given picture type pict_type.">av_get_picture_type_char</a>(<span class="keyword">enum</span> <a class="code" href="group__lavu__picture.html#gae6cbcab1f70d8e476757f1c1f5a0a78e">AVPictureType</a> pict_type);
<a name="l00284"></a>00284 <span class="comment"></span>
<a name="l00285"></a>00285 <span class="comment">/**</span>
<a name="l00286"></a>00286 <span class="comment"> * @}</span>
<a name="l00287"></a>00287 <span class="comment"> */</span>
<a name="l00288"></a>00288
<a name="l00289"></a>00289 <span class="preprocessor">#include "<a class="code" href="common_8h.html" title="common internal and external API header">common.h</a>"</span>
<a name="l00290"></a>00290 <span class="preprocessor">#include "<a class="code" href="error_8h.html" title="error code definitions">error.h</a>"</span>
<a name="l00291"></a>00291 <span class="preprocessor">#include "<a class="code" href="rational_8h.html" title="rational numbers">rational.h</a>"</span>
<a name="l00292"></a>00292 <span class="preprocessor">#include "<a class="code" href="libavutil_2version_8h.html" title="Libavutil version macros.">version.h</a>"</span>
<a name="l00293"></a>00293 <span class="preprocessor">#include "<a class="code" href="macros_8h.html" title="Utility Preprocessor macros.">macros.h</a>"</span>
<a name="l00294"></a>00294 <span class="preprocessor">#include "<a class="code" href="mathematics_8h.html">mathematics.h</a>"</span>
<a name="l00295"></a>00295 <span class="preprocessor">#include "<a class="code" href="log_8h.html">log.h</a>"</span>
<a name="l00296"></a>00296 <span class="preprocessor">#include "<a class="code" href="pixfmt_8h.html" title="pixel format definitions">pixfmt.h</a>"</span>
<a name="l00297"></a>00297 <span class="comment"></span>
<a name="l00298"></a>00298 <span class="comment">/**</span>
<a name="l00299"></a>00299 <span class="comment"> * Return x default pointer in case p is NULL.</span>
<a name="l00300"></a>00300 <span class="comment"> */</span>
<a name="l00301"></a><a class="code" href="group__lavu__misc.html#ga87458dccf9ab1444c363df5fa8a3f28f">00301</a> <span class="keyword">static</span> <span class="keyword">inline</span> <span class="keywordtype">void</span> *<a class="code" href="group__lavu__misc.html#ga87458dccf9ab1444c363df5fa8a3f28f" title="Return x default pointer in case p is NULL.">av_x_if_null</a>(<span class="keyword">const</span> <span class="keywordtype">void</span> *p, <span class="keyword">const</span> <span class="keywordtype">void</span> *x)
<a name="l00302"></a>00302 {
<a name="l00303"></a>00303 <span class="keywordflow">return</span> (<span class="keywordtype">void</span> *)(intptr_t)(p ? p : x);
<a name="l00304"></a>00304 }
<a name="l00305"></a>00305 <span class="comment"></span>
<a name="l00306"></a>00306 <span class="comment">/**</span>
<a name="l00307"></a>00307 <span class="comment"> * Compute the length of an integer list.</span>
<a name="l00308"></a>00308 <span class="comment"> *</span>
<a name="l00309"></a>00309 <span class="comment"> * @param elsize size in bytes of each list element (only 1, 2, 4 or 8)</span>
<a name="l00310"></a>00310 <span class="comment"> * @param term list terminator (usually 0 or -1)</span>
<a name="l00311"></a>00311 <span class="comment"> * @param list pointer to the list</span>
<a name="l00312"></a>00312 <span class="comment"> * @return length of the list, in elements, not counting the terminator</span>
<a name="l00313"></a>00313 <span class="comment"> */</span>
<a name="l00314"></a>00314 <span class="keywordtype">unsigned</span> <a class="code" href="group__lavu__misc.html#ga7894e9b1ec8844685bc9101779c7d533" title="Compute the length of an integer list.">av_int_list_length_for_size</a>(<span class="keywordtype">unsigned</span> elsize,
<a name="l00315"></a>00315 <span class="keyword">const</span> <span class="keywordtype">void</span> *list, uint64_t term) <a class="code" href="attributes_8h.html#adc7fd5bb40d84900a3a30ef3318020c2">av_pure</a>;
<a name="l00316"></a>00316 <span class="comment"></span>
<a name="l00317"></a>00317 <span class="comment">/**</span>
<a name="l00318"></a>00318 <span class="comment"> * Compute the length of an integer list.</span>
<a name="l00319"></a>00319 <span class="comment"> *</span>
<a name="l00320"></a>00320 <span class="comment"> * @param term list terminator (usually 0 or -1)</span>
<a name="l00321"></a>00321 <span class="comment"> * @param list pointer to the list</span>
<a name="l00322"></a>00322 <span class="comment"> * @return length of the list, in elements, not counting the terminator</span>
<a name="l00323"></a>00323 <span class="comment"> */</span>
<a name="l00324"></a><a class="code" href="group__lavu__misc.html#gaddb1ee4dba6de5845eda3e9e1e740366">00324</a> <span class="preprocessor">#define av_int_list_length(list, term) \</span>
<a name="l00325"></a>00325 <span class="preprocessor"> av_int_list_length_for_size(sizeof(*(list)), list, term)</span>
<a name="l00326"></a>00326 <span class="preprocessor"></span><span class="comment"></span>
<a name="l00327"></a>00327 <span class="comment">/**</span>
<a name="l00328"></a>00328 <span class="comment"> * Open a file using a UTF-8 filename.</span>
<a name="l00329"></a>00329 <span class="comment"> * The API of this function matches POSIX fopen(), errors are returned through</span>
<a name="l00330"></a>00330 <span class="comment"> * errno.</span>
<a name="l00331"></a>00331 <span class="comment"> */</span>
<a name="l00332"></a>00332 FILE *<a class="code" href="group__lavu__misc.html#ga553b85a36da32c041738a89aa61f9fbd" title="Open a file using a UTF-8 filename.">av_fopen_utf8</a>(<span class="keyword">const</span> <span class="keywordtype">char</span> *path, <span class="keyword">const</span> <span class="keywordtype">char</span> *mode);
<a name="l00333"></a>00333 <span class="comment"></span>
<a name="l00334"></a>00334 <span class="comment">/**</span>
<a name="l00335"></a>00335 <span class="comment"> * Return the fractional representation of the internal time base.</span>
<a name="l00336"></a>00336 <span class="comment"> */</span>
<a name="l00337"></a>00337 <a class="code" href="structAVRational.html" title="rational number numerator/denominator">AVRational</a> <a class="code" href="group__lavu__misc.html#gab889104afd2e874f9dd2b3b78b04f3f2" title="Return the fractional representation of the internal time base.">av_get_time_base_q</a>(<span class="keywordtype">void</span>);
<a name="l00338"></a>00338 <span class="comment"></span>
<a name="l00339"></a>00339 <span class="comment">/**</span>
<a name="l00340"></a>00340 <span class="comment"> * @}</span>
<a name="l00341"></a>00341 <span class="comment"> * @}</span>
<a name="l00342"></a>00342 <span class="comment"> */</span>
<a name="l00343"></a>00343
<a name="l00344"></a>00344 <span class="preprocessor">#endif </span><span class="comment">/* AVUTIL_AVUTIL_H */</span>
</pre></div></div><!-- contents -->
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