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<a href="avutil_8h.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">/*</span></div>
<div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment"> * copyright (c) 2006 Michael Niedermayer <michaelni@gmx.at></span></div>
<div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment"> * This file is part of FFmpeg.</span></div>
<div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment"> * FFmpeg is free software; you can redistribute it and/or</span></div>
<div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment"> * modify it under the terms of the GNU Lesser General Public</span></div>
<div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment"> * License as published by the Free Software Foundation; either</span></div>
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment"> * version 2.1 of the License, or (at your option) any later version.</span></div>
<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment"> * FFmpeg is distributed in the hope that it will be useful,</span></div>
<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment"> * but WITHOUT ANY WARRANTY; without even the implied warranty of</span></div>
<div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="comment"> * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU</span></div>
<div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="comment"> * Lesser General Public License for more details.</span></div>
<div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="comment"> * You should have received a copy of the GNU Lesser General Public</span></div>
<div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="comment"> * License along with FFmpeg; if not, write to the Free Software</span></div>
<div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="comment"> * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA</span></div>
<div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00020"></a><span class="lineno"> 20</span> </div>
<div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="preprocessor">#ifndef AVUTIL_AVUTIL_H</span></div>
<div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="preprocessor"></span><span class="preprocessor">#define AVUTIL_AVUTIL_H</span></div>
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="preprocessor"></span><span class="comment"></span></div>
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="comment"> * @file</span></div>
<div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="comment"> * external API header</span></div>
<div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="comment"></span></div>
<div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="comment"> * @mainpage</span></div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00032"></a><span class="lineno"> 32</span> <span class="comment"> * @section ffmpeg_intro Introduction</span></div>
<div class="line"><a name="l00033"></a><span class="lineno"> 33</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00034"></a><span class="lineno"> 34</span> <span class="comment"> * This document describes the usage of the different libraries</span></div>
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span> <span class="comment"> * provided by FFmpeg.</span></div>
<div class="line"><a name="l00036"></a><span class="lineno"> 36</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00037"></a><span class="lineno"> 37</span> <span class="comment"> * @li @ref libavc "libavcodec" encoding/decoding library</span></div>
<div class="line"><a name="l00038"></a><span class="lineno"> 38</span> <span class="comment"> * @li @ref lavfi "libavfilter" graph-based frame editing library</span></div>
<div class="line"><a name="l00039"></a><span class="lineno"> 39</span> <span class="comment"> * @li @ref libavf "libavformat" I/O and muxing/demuxing library</span></div>
<div class="line"><a name="l00040"></a><span class="lineno"> 40</span> <span class="comment"> * @li @ref lavd "libavdevice" special devices muxing/demuxing library</span></div>
<div class="line"><a name="l00041"></a><span class="lineno"> 41</span> <span class="comment"> * @li @ref lavu "libavutil" common utility library</span></div>
<div class="line"><a name="l00042"></a><span class="lineno"> 42</span> <span class="comment"> * @li @ref lswr "libswresample" audio resampling, format conversion and mixing</span></div>
<div class="line"><a name="l00043"></a><span class="lineno"> 43</span> <span class="comment"> * @li @ref lpp "libpostproc" post processing library</span></div>
<div class="line"><a name="l00044"></a><span class="lineno"> 44</span> <span class="comment"> * @li @ref libsws "libswscale" color conversion and scaling library</span></div>
<div class="line"><a name="l00045"></a><span class="lineno"> 45</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00046"></a><span class="lineno"> 46</span> <span class="comment"> * @section ffmpeg_versioning Versioning and compatibility</span></div>
<div class="line"><a name="l00047"></a><span class="lineno"> 47</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00048"></a><span class="lineno"> 48</span> <span class="comment"> * Each of the FFmpeg libraries contains a version.h header, which defines a</span></div>
<div class="line"><a name="l00049"></a><span class="lineno"> 49</span> <span class="comment"> * major, minor and micro version number with the</span></div>
<div class="line"><a name="l00050"></a><span class="lineno"> 50</span> <span class="comment"> * <em>LIBRARYNAME_VERSION_{MAJOR,MINOR,MICRO}</em> macros. The major version</span></div>
<div class="line"><a name="l00051"></a><span class="lineno"> 51</span> <span class="comment"> * number is incremented with backward incompatible changes - e.g. removing</span></div>
<div class="line"><a name="l00052"></a><span class="lineno"> 52</span> <span class="comment"> * parts of the public API, reordering public struct members, etc. The minor</span></div>
<div class="line"><a name="l00053"></a><span class="lineno"> 53</span> <span class="comment"> * version number is incremented for backward compatible API changes or major</span></div>
<div class="line"><a name="l00054"></a><span class="lineno"> 54</span> <span class="comment"> * new features - e.g. adding a new public function or a new decoder. The micro</span></div>
<div class="line"><a name="l00055"></a><span class="lineno"> 55</span> <span class="comment"> * version number is incremented for smaller changes that a calling program</span></div>
<div class="line"><a name="l00056"></a><span class="lineno"> 56</span> <span class="comment"> * might still want to check for - e.g. changing behavior in a previously</span></div>
<div class="line"><a name="l00057"></a><span class="lineno"> 57</span> <span class="comment"> * unspecified situation.</span></div>
<div class="line"><a name="l00058"></a><span class="lineno"> 58</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00059"></a><span class="lineno"> 59</span> <span class="comment"> * FFmpeg guarantees backward API and ABI compatibility for each library as long</span></div>
<div class="line"><a name="l00060"></a><span class="lineno"> 60</span> <span class="comment"> * as its major version number is unchanged. This means that no public symbols</span></div>
<div class="line"><a name="l00061"></a><span class="lineno"> 61</span> <span class="comment"> * will be removed or renamed. Types and names of the public struct members and</span></div>
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span> <span class="comment"> * values of public macros and enums will remain the same (unless they were</span></div>
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span> <span class="comment"> * explicitly declared as not part of the public API). Documented behavior will</span></div>
<div class="line"><a name="l00064"></a><span class="lineno"> 64</span> <span class="comment"> * not change.</span></div>
<div class="line"><a name="l00065"></a><span class="lineno"> 65</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00066"></a><span class="lineno"> 66</span> <span class="comment"> * In other words, any correct program that works with a given FFmpeg snapshot</span></div>
<div class="line"><a name="l00067"></a><span class="lineno"> 67</span> <span class="comment"> * should work just as well without any changes with any later snapshot with the</span></div>
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span> <span class="comment"> * same major versions. This applies to both rebuilding the program against new</span></div>
<div class="line"><a name="l00069"></a><span class="lineno"> 69</span> <span class="comment"> * FFmpeg versions or to replacing the dynamic FFmpeg libraries that a program</span></div>
<div class="line"><a name="l00070"></a><span class="lineno"> 70</span> <span class="comment"> * links against.</span></div>
<div class="line"><a name="l00071"></a><span class="lineno"> 71</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00072"></a><span class="lineno"> 72</span> <span class="comment"> * However, new public symbols may be added and new members may be appended to</span></div>
<div class="line"><a name="l00073"></a><span class="lineno"> 73</span> <span class="comment"> * public structs whose size is not part of public ABI (most public structs in</span></div>
<div class="line"><a name="l00074"></a><span class="lineno"> 74</span> <span class="comment"> * FFmpeg). New macros and enum values may be added. Behavior in undocumented</span></div>
<div class="line"><a name="l00075"></a><span class="lineno"> 75</span> <span class="comment"> * situations may change slightly (and be documented). All those are accompanied</span></div>
<div class="line"><a name="l00076"></a><span class="lineno"> 76</span> <span class="comment"> * by an entry in doc/APIchanges and incrementing either the minor or micro</span></div>
<div class="line"><a name="l00077"></a><span class="lineno"> 77</span> <span class="comment"> * version number.</span></div>
<div class="line"><a name="l00078"></a><span class="lineno"> 78</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00079"></a><span class="lineno"> 79</span> <span class="comment"></span></div>
<div class="line"><a name="l00080"></a><span class="lineno"> 80</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00081"></a><span class="lineno"> 81</span> <span class="comment"> * @defgroup lavu Common utility functions</span></div>
<div class="line"><a name="l00082"></a><span class="lineno"> 82</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00083"></a><span class="lineno"> 83</span> <span class="comment"> * @brief</span></div>
<div class="line"><a name="l00084"></a><span class="lineno"> 84</span> <span class="comment"> * libavutil contains the code shared across all the other FFmpeg</span></div>
<div class="line"><a name="l00085"></a><span class="lineno"> 85</span> <span class="comment"> * libraries</span></div>
<div class="line"><a name="l00086"></a><span class="lineno"> 86</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00087"></a><span class="lineno"> 87</span> <span class="comment"> * @note In order to use the functions provided by avutil you must include</span></div>
<div class="line"><a name="l00088"></a><span class="lineno"> 88</span> <span class="comment"> * the specific header.</span></div>
<div class="line"><a name="l00089"></a><span class="lineno"> 89</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00090"></a><span class="lineno"> 90</span> <span class="comment"> * @{</span></div>
<div class="line"><a name="l00091"></a><span class="lineno"> 91</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00092"></a><span class="lineno"> 92</span> <span class="comment"> * @defgroup lavu_crypto Crypto and Hashing</span></div>
<div class="line"><a name="l00093"></a><span class="lineno"> 93</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00094"></a><span class="lineno"> 94</span> <span class="comment"> * @{</span></div>
<div class="line"><a name="l00095"></a><span class="lineno"> 95</span> <span class="comment"> * @}</span></div>
<div class="line"><a name="l00096"></a><span class="lineno"> 96</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00097"></a><span class="lineno"> 97</span> <span class="comment"> * @defgroup lavu_math Maths</span></div>
<div class="line"><a name="l00098"></a><span class="lineno"> 98</span> <span class="comment"> * @{</span></div>
<div class="line"><a name="l00099"></a><span class="lineno"> 99</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00100"></a><span class="lineno"> 100</span> <span class="comment"> * @}</span></div>
<div class="line"><a name="l00101"></a><span class="lineno"> 101</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00102"></a><span class="lineno"> 102</span> <span class="comment"> * @defgroup lavu_string String Manipulation</span></div>
<div class="line"><a name="l00103"></a><span class="lineno"> 103</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00104"></a><span class="lineno"> 104</span> <span class="comment"> * @{</span></div>
<div class="line"><a name="l00105"></a><span class="lineno"> 105</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00106"></a><span class="lineno"> 106</span> <span class="comment"> * @}</span></div>
<div class="line"><a name="l00107"></a><span class="lineno"> 107</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00108"></a><span class="lineno"> 108</span> <span class="comment"> * @defgroup lavu_mem Memory Management</span></div>
<div class="line"><a name="l00109"></a><span class="lineno"> 109</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00110"></a><span class="lineno"> 110</span> <span class="comment"> * @{</span></div>
<div class="line"><a name="l00111"></a><span class="lineno"> 111</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00112"></a><span class="lineno"> 112</span> <span class="comment"> * @}</span></div>
<div class="line"><a name="l00113"></a><span class="lineno"> 113</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00114"></a><span class="lineno"> 114</span> <span class="comment"> * @defgroup lavu_data Data Structures</span></div>
<div class="line"><a name="l00115"></a><span class="lineno"> 115</span> <span class="comment"> * @{</span></div>
<div class="line"><a name="l00116"></a><span class="lineno"> 116</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00117"></a><span class="lineno"> 117</span> <span class="comment"> * @}</span></div>
<div class="line"><a name="l00118"></a><span class="lineno"> 118</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00119"></a><span class="lineno"> 119</span> <span class="comment"> * @defgroup lavu_audio Audio related</span></div>
<div class="line"><a name="l00120"></a><span class="lineno"> 120</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00121"></a><span class="lineno"> 121</span> <span class="comment"> * @{</span></div>
<div class="line"><a name="l00122"></a><span class="lineno"> 122</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00123"></a><span class="lineno"> 123</span> <span class="comment"> * @}</span></div>
<div class="line"><a name="l00124"></a><span class="lineno"> 124</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00125"></a><span class="lineno"> 125</span> <span class="comment"> * @defgroup lavu_error Error Codes</span></div>
<div class="line"><a name="l00126"></a><span class="lineno"> 126</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00127"></a><span class="lineno"> 127</span> <span class="comment"> * @{</span></div>
<div class="line"><a name="l00128"></a><span class="lineno"> 128</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00129"></a><span class="lineno"> 129</span> <span class="comment"> * @}</span></div>
<div class="line"><a name="l00130"></a><span class="lineno"> 130</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00131"></a><span class="lineno"> 131</span> <span class="comment"> * @defgroup lavu_log Logging Facility</span></div>
<div class="line"><a name="l00132"></a><span class="lineno"> 132</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00133"></a><span class="lineno"> 133</span> <span class="comment"> * @{</span></div>
<div class="line"><a name="l00134"></a><span class="lineno"> 134</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00135"></a><span class="lineno"> 135</span> <span class="comment"> * @}</span></div>
<div class="line"><a name="l00136"></a><span class="lineno"> 136</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00137"></a><span class="lineno"> 137</span> <span class="comment"> * @defgroup lavu_misc Other</span></div>
<div class="line"><a name="l00138"></a><span class="lineno"> 138</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00139"></a><span class="lineno"> 139</span> <span class="comment"> * @{</span></div>
<div class="line"><a name="l00140"></a><span class="lineno"> 140</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00141"></a><span class="lineno"> 141</span> <span class="comment"> * @defgroup preproc_misc Preprocessor String Macros</span></div>
<div class="line"><a name="l00142"></a><span class="lineno"> 142</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00143"></a><span class="lineno"> 143</span> <span class="comment"> * @{</span></div>
<div class="line"><a name="l00144"></a><span class="lineno"> 144</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00145"></a><span class="lineno"> 145</span> <span class="comment"> * @}</span></div>
<div class="line"><a name="l00146"></a><span class="lineno"> 146</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00147"></a><span class="lineno"> 147</span> <span class="comment"> * @defgroup version_utils Library Version Macros</span></div>
<div class="line"><a name="l00148"></a><span class="lineno"> 148</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00149"></a><span class="lineno"> 149</span> <span class="comment"> * @{</span></div>
<div class="line"><a name="l00150"></a><span class="lineno"> 150</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00151"></a><span class="lineno"> 151</span> <span class="comment"> * @}</span></div>
<div class="line"><a name="l00152"></a><span class="lineno"> 152</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00153"></a><span class="lineno"> 153</span> </div>
<div class="line"><a name="l00154"></a><span class="lineno"> 154</span> <span class="comment"></span></div>
<div class="line"><a name="l00155"></a><span class="lineno"> 155</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00156"></a><span class="lineno"> 156</span> <span class="comment"> * @addtogroup lavu_ver</span></div>
<div class="line"><a name="l00157"></a><span class="lineno"> 157</span> <span class="comment"> * @{</span></div>
<div class="line"><a name="l00158"></a><span class="lineno"> 158</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00159"></a><span class="lineno"> 159</span> <span class="comment"></span></div>
<div class="line"><a name="l00160"></a><span class="lineno"> 160</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00161"></a><span class="lineno"> 161</span> <span class="comment"> * Return the LIBAVUTIL_VERSION_INT constant.</span></div>
<div class="line"><a name="l00162"></a><span class="lineno"> 162</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00163"></a><span class="lineno"> 163</span> <span class="keywordtype">unsigned</span> <a class="code" href="group__lavu__ver.html#ga9a979c78d33d8767b51952f7f5c61541">avutil_version</a>(<span class="keywordtype">void</span>);</div>
<div class="line"><a name="l00164"></a><span class="lineno"> 164</span> <span class="comment"></span></div>
<div class="line"><a name="l00165"></a><span class="lineno"> 165</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00166"></a><span class="lineno"> 166</span> <span class="comment"> * Return an informative version string. This usually is the actual release</span></div>
<div class="line"><a name="l00167"></a><span class="lineno"> 167</span> <span class="comment"> * version number or a git commit description. This string has no fixed format</span></div>
<div class="line"><a name="l00168"></a><span class="lineno"> 168</span> <span class="comment"> * and can change any time. It should never be parsed by code.</span></div>
<div class="line"><a name="l00169"></a><span class="lineno"> 169</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00170"></a><span class="lineno"> 170</span> <span class="keyword">const</span> <span class="keywordtype">char</span> *<a class="code" href="group__lavu__ver.html#gabaea9f86706819534baceeac7ea5818a">av_version_info</a>(<span class="keywordtype">void</span>);</div>
<div class="line"><a name="l00171"></a><span class="lineno"> 171</span> <span class="comment"></span></div>
<div class="line"><a name="l00172"></a><span class="lineno"> 172</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00173"></a><span class="lineno"> 173</span> <span class="comment"> * Return the libavutil build-time configuration.</span></div>
<div class="line"><a name="l00174"></a><span class="lineno"> 174</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00175"></a><span class="lineno"> 175</span> <span class="keyword">const</span> <span class="keywordtype">char</span> *<a class="code" href="group__lavu__ver.html#gaf75e78eac0a55a8c3736f89b018a5687">avutil_configuration</a>(<span class="keywordtype">void</span>);</div>
<div class="line"><a name="l00176"></a><span class="lineno"> 176</span> <span class="comment"></span></div>
<div class="line"><a name="l00177"></a><span class="lineno"> 177</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00178"></a><span class="lineno"> 178</span> <span class="comment"> * Return the libavutil license.</span></div>
<div class="line"><a name="l00179"></a><span class="lineno"> 179</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00180"></a><span class="lineno"> 180</span> <span class="keyword">const</span> <span class="keywordtype">char</span> *<a class="code" href="group__lavu__ver.html#ga88957e92f27b9d3fca0ec8cf43303b72">avutil_license</a>(<span class="keywordtype">void</span>);</div>
<div class="line"><a name="l00181"></a><span class="lineno"> 181</span> <span class="comment"></span></div>
<div class="line"><a name="l00182"></a><span class="lineno"> 182</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00183"></a><span class="lineno"> 183</span> <span class="comment"> * @}</span></div>
<div class="line"><a name="l00184"></a><span class="lineno"> 184</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00185"></a><span class="lineno"> 185</span> <span class="comment"></span></div>
<div class="line"><a name="l00186"></a><span class="lineno"> 186</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00187"></a><span class="lineno"> 187</span> <span class="comment"> * @addtogroup lavu_media Media Type</span></div>
<div class="line"><a name="l00188"></a><span class="lineno"> 188</span> <span class="comment"> * @brief Media Type</span></div>
<div class="line"><a name="l00189"></a><span class="lineno"> 189</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00190"></a><span class="lineno"> 190</span> </div>
<div class="line"><a name="l00191"></a><span class="lineno"><a class="line" href="group__lavu__misc.html#ga9a84bba4713dfced21a1a56163be1f48"> 191</a></span> <span class="keyword">enum</span> <a class="code" href="group__lavu__misc.html#ga9a84bba4713dfced21a1a56163be1f48">AVMediaType</a> {</div>
<div class="line"><a name="l00192"></a><span class="lineno"><a class="line" href="group__lavu__misc.html#gga9a84bba4713dfced21a1a56163be1f48afdadbd6c4f612c59f6b6c7c6f84fd347"> 192</a></span>  <a class="code" href="group__lavu__misc.html#gga9a84bba4713dfced21a1a56163be1f48afdadbd6c4f612c59f6b6c7c6f84fd347">AVMEDIA_TYPE_UNKNOWN</a> = -1, <span class="comment">///< Usually treated as AVMEDIA_TYPE_DATA</span></div>
<div class="line"><a name="l00193"></a><span class="lineno"><a class="line" href="group__lavu__misc.html#gga9a84bba4713dfced21a1a56163be1f48ac1a46f59be5c6c2d3412ab172d6b8cf5"> 193</a></span> <span class="comment"></span> <a class="code" href="group__lavu__misc.html#gga9a84bba4713dfced21a1a56163be1f48ac1a46f59be5c6c2d3412ab172d6b8cf5">AVMEDIA_TYPE_VIDEO</a>,</div>
<div class="line"><a name="l00194"></a><span class="lineno"><a class="line" href="group__lavu__misc.html#gga9a84bba4713dfced21a1a56163be1f48a7b4e33b8f30ac94d34ce8d9f7c33927a"> 194</a></span>  <a class="code" href="group__lavu__misc.html#gga9a84bba4713dfced21a1a56163be1f48a7b4e33b8f30ac94d34ce8d9f7c33927a">AVMEDIA_TYPE_AUDIO</a>,</div>
<div class="line"><a name="l00195"></a><span class="lineno"><a class="line" href="group__lavu__misc.html#gga9a84bba4713dfced21a1a56163be1f48ae3df4d77c6908fb626293c2fed215d52"> 195</a></span>  <a class="code" href="group__lavu__misc.html#gga9a84bba4713dfced21a1a56163be1f48ae3df4d77c6908fb626293c2fed215d52">AVMEDIA_TYPE_DATA</a>, <span class="comment">///< Opaque data information usually continuous</span></div>
<div class="line"><a name="l00196"></a><span class="lineno"><a class="line" href="group__lavu__misc.html#gga9a84bba4713dfced21a1a56163be1f48aa64a67386a9c53360744b86e4707b831"> 196</a></span> <span class="comment"></span> <a class="code" href="group__lavu__misc.html#gga9a84bba4713dfced21a1a56163be1f48aa64a67386a9c53360744b86e4707b831">AVMEDIA_TYPE_SUBTITLE</a>,</div>
<div class="line"><a name="l00197"></a><span class="lineno"><a class="line" href="group__lavu__misc.html#gga9a84bba4713dfced21a1a56163be1f48a2d09f16df8631e64e8fa566142cdc99d"> 197</a></span>  <a class="code" href="group__lavu__misc.html#gga9a84bba4713dfced21a1a56163be1f48a2d09f16df8631e64e8fa566142cdc99d">AVMEDIA_TYPE_ATTACHMENT</a>, <span class="comment">///< Opaque data information usually sparse</span></div>
<div class="line"><a name="l00198"></a><span class="lineno"><a class="line" href="group__lavu__misc.html#gga9a84bba4713dfced21a1a56163be1f48a8e220e09ef38f26963e8e2ec731fb7d9"> 198</a></span> <span class="comment"></span> <a class="code" href="group__lavu__misc.html#gga9a84bba4713dfced21a1a56163be1f48a8e220e09ef38f26963e8e2ec731fb7d9">AVMEDIA_TYPE_NB</a></div>
<div class="line"><a name="l00199"></a><span class="lineno"> 199</span> };</div>
<div class="line"><a name="l00200"></a><span class="lineno"> 200</span> <span class="comment"></span></div>
<div class="line"><a name="l00201"></a><span class="lineno"> 201</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00202"></a><span class="lineno"> 202</span> <span class="comment"> * Return a string describing the media_type enum, NULL if media_type</span></div>
<div class="line"><a name="l00203"></a><span class="lineno"> 203</span> <span class="comment"> * is unknown.</span></div>
<div class="line"><a name="l00204"></a><span class="lineno"> 204</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00205"></a><span class="lineno"> 205</span> <span class="keyword">const</span> <span class="keywordtype">char</span> *<a class="code" href="group__lavu__misc.html#gaf21645cfa855b2caf9699d7dc7b2d08e">av_get_media_type_string</a>(<span class="keyword">enum</span> <a class="code" href="group__lavu__misc.html#ga9a84bba4713dfced21a1a56163be1f48">AVMediaType</a> media_type);</div>
<div class="line"><a name="l00206"></a><span class="lineno"> 206</span> <span class="comment"></span></div>
<div class="line"><a name="l00207"></a><span class="lineno"> 207</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00208"></a><span class="lineno"> 208</span> <span class="comment"> * @defgroup lavu_const Constants</span></div>
<div class="line"><a name="l00209"></a><span class="lineno"> 209</span> <span class="comment"> * @{</span></div>
<div class="line"><a name="l00210"></a><span class="lineno"> 210</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00211"></a><span class="lineno"> 211</span> <span class="comment"> * @defgroup lavu_enc Encoding specific</span></div>
<div class="line"><a name="l00212"></a><span class="lineno"> 212</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00213"></a><span class="lineno"> 213</span> <span class="comment"> * @note those definition should move to avcodec</span></div>
<div class="line"><a name="l00214"></a><span class="lineno"> 214</span> <span class="comment"> * @{</span></div>
<div class="line"><a name="l00215"></a><span class="lineno"> 215</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00216"></a><span class="lineno"> 216</span> </div>
<div class="line"><a name="l00217"></a><span class="lineno"><a class="line" href="group__lavu__enc.html#ga979d8e4b4947c924436fcc3b62cafea7"> 217</a></span> <span class="preprocessor">#define FF_LAMBDA_SHIFT 7</span></div>
<div class="line"><a name="l00218"></a><span class="lineno"><a class="line" href="group__lavu__enc.html#ga44d4d51371d07ef43eb009ef29a0b534"> 218</a></span> <span class="preprocessor"></span><span class="preprocessor">#define FF_LAMBDA_SCALE (1<<FF_LAMBDA_SHIFT)</span></div>
<div class="line"><a name="l00219"></a><span class="lineno"><a class="line" href="group__lavu__enc.html#gad6ce86405f7381daad36ccf516b4da98"> 219</a></span> <span class="preprocessor"></span><span class="preprocessor">#define FF_QP2LAMBDA 118 </span><span class="comment">///< factor to convert from H.263 QP to lambda</span></div>
<div class="line"><a name="l00220"></a><span class="lineno"><a class="line" href="group__lavu__enc.html#gabc22a7ffbd4a73e81dd69e8c45e6cf8c"> 220</a></span> <span class="comment"></span>#define FF_LAMBDA_MAX (256*128-1)</div>
<div class="line"><a name="l00221"></a><span class="lineno"> 221</span> </div>
<div class="line"><a name="l00222"></a><span class="lineno"><a class="line" href="group__lavu__enc.html#gab1026a3e2eb8430ec938fffdc1bb2238"> 222</a></span> <span class="preprocessor">#define FF_QUALITY_SCALE FF_LAMBDA_SCALE //FIXME maybe remove</span></div>
<div class="line"><a name="l00223"></a><span class="lineno"> 223</span> <span class="preprocessor"></span><span class="comment"></span></div>
<div class="line"><a name="l00224"></a><span class="lineno"> 224</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00225"></a><span class="lineno"> 225</span> <span class="comment"> * @}</span></div>
<div class="line"><a name="l00226"></a><span class="lineno"> 226</span> <span class="comment"> * @defgroup lavu_time Timestamp specific</span></div>
<div class="line"><a name="l00227"></a><span class="lineno"> 227</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00228"></a><span class="lineno"> 228</span> <span class="comment"> * FFmpeg internal timebase and timestamp definitions</span></div>
<div class="line"><a name="l00229"></a><span class="lineno"> 229</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00230"></a><span class="lineno"> 230</span> <span class="comment"> * @{</span></div>
<div class="line"><a name="l00231"></a><span class="lineno"> 231</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00232"></a><span class="lineno"> 232</span> <span class="comment"></span></div>
<div class="line"><a name="l00233"></a><span class="lineno"> 233</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00234"></a><span class="lineno"> 234</span> <span class="comment"> * @brief Undefined timestamp value</span></div>
<div class="line"><a name="l00235"></a><span class="lineno"> 235</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00236"></a><span class="lineno"> 236</span> <span class="comment"> * Usually reported by demuxer that work on containers that do not provide</span></div>
<div class="line"><a name="l00237"></a><span class="lineno"> 237</span> <span class="comment"> * either pts or dts.</span></div>
<div class="line"><a name="l00238"></a><span class="lineno"> 238</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00239"></a><span class="lineno"> 239</span> </div>
<div class="line"><a name="l00240"></a><span class="lineno"><a class="line" href="group__lavu__time.html#ga2eaefe702f95f619ea6f2d08afa01be1"> 240</a></span> <span class="preprocessor">#define AV_NOPTS_VALUE ((int64_t)UINT64_C(0x8000000000000000))</span></div>
<div class="line"><a name="l00241"></a><span class="lineno"> 241</span> <span class="preprocessor"></span><span class="comment"></span></div>
<div class="line"><a name="l00242"></a><span class="lineno"> 242</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00243"></a><span class="lineno"> 243</span> <span class="comment"> * Internal time base represented as integer</span></div>
<div class="line"><a name="l00244"></a><span class="lineno"> 244</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00245"></a><span class="lineno"> 245</span> </div>
<div class="line"><a name="l00246"></a><span class="lineno"><a class="line" href="group__lavu__time.html#gaa11ed202b70e1f52bac809811a910e2a"> 246</a></span> <span class="preprocessor">#define AV_TIME_BASE 1000000</span></div>
<div class="line"><a name="l00247"></a><span class="lineno"> 247</span> <span class="preprocessor"></span><span class="comment"></span></div>
<div class="line"><a name="l00248"></a><span class="lineno"> 248</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00249"></a><span class="lineno"> 249</span> <span class="comment"> * Internal time base represented as fractional value</span></div>
<div class="line"><a name="l00250"></a><span class="lineno"> 250</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00251"></a><span class="lineno"> 251</span> </div>
<div class="line"><a name="l00252"></a><span class="lineno"><a class="line" href="group__lavu__time.html#gafd07a13a4ddaa6015275cad6022d9ee3"> 252</a></span> <span class="preprocessor">#define AV_TIME_BASE_Q (AVRational){1, AV_TIME_BASE}</span></div>
<div class="line"><a name="l00253"></a><span class="lineno"> 253</span> <span class="preprocessor"></span><span class="comment"></span></div>
<div class="line"><a name="l00254"></a><span class="lineno"> 254</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00255"></a><span class="lineno"> 255</span> <span class="comment"> * @}</span></div>
<div class="line"><a name="l00256"></a><span class="lineno"> 256</span> <span class="comment"> * @}</span></div>
<div class="line"><a name="l00257"></a><span class="lineno"> 257</span> <span class="comment"> * @defgroup lavu_picture Image related</span></div>
<div class="line"><a name="l00258"></a><span class="lineno"> 258</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00259"></a><span class="lineno"> 259</span> <span class="comment"> * AVPicture types, pixel formats and basic image planes manipulation.</span></div>
<div class="line"><a name="l00260"></a><span class="lineno"> 260</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00261"></a><span class="lineno"> 261</span> <span class="comment"> * @{</span></div>
<div class="line"><a name="l00262"></a><span class="lineno"> 262</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00263"></a><span class="lineno"> 263</span> </div>
<div class="line"><a name="l00264"></a><span class="lineno"><a class="line" href="group__lavu__picture.html#gae6cbcab1f70d8e476757f1c1f5a0a78e"> 264</a></span> <span class="keyword">enum</span> <a class="code" href="group__lavu__picture.html#gae6cbcab1f70d8e476757f1c1f5a0a78e">AVPictureType</a> {</div>
<div class="line"><a name="l00265"></a><span class="lineno"><a class="line" href="group__lavu__picture.html#ggae6cbcab1f70d8e476757f1c1f5a0a78ea33183189d771e3325ccdd36fa980b6f6"> 265</a></span>  <a class="code" href="group__lavu__picture.html#ggae6cbcab1f70d8e476757f1c1f5a0a78ea33183189d771e3325ccdd36fa980b6f6">AV_PICTURE_TYPE_NONE</a> = 0, <span class="comment">///< Undefined</span></div>
<div class="line"><a name="l00266"></a><span class="lineno"><a class="line" href="group__lavu__picture.html#ggae6cbcab1f70d8e476757f1c1f5a0a78ea02be39f151a8ace7a65c86e13053e817"> 266</a></span> <span class="comment"></span> <a class="code" href="group__lavu__picture.html#ggae6cbcab1f70d8e476757f1c1f5a0a78ea02be39f151a8ace7a65c86e13053e817">AV_PICTURE_TYPE_I</a>, <span class="comment">///< Intra</span></div>
<div class="line"><a name="l00267"></a><span class="lineno"><a class="line" href="group__lavu__picture.html#ggae6cbcab1f70d8e476757f1c1f5a0a78eaa6fc0479507a03f173f07fc75dab2193"> 267</a></span> <span class="comment"></span> <a class="code" href="group__lavu__picture.html#ggae6cbcab1f70d8e476757f1c1f5a0a78eaa6fc0479507a03f173f07fc75dab2193">AV_PICTURE_TYPE_P</a>, <span class="comment">///< Predicted</span></div>
<div class="line"><a name="l00268"></a><span class="lineno"><a class="line" href="group__lavu__picture.html#ggae6cbcab1f70d8e476757f1c1f5a0a78ead22f8968e99bc48897c3f4ac29e82dae"> 268</a></span> <span class="comment"></span> <a class="code" href="group__lavu__picture.html#ggae6cbcab1f70d8e476757f1c1f5a0a78ead22f8968e99bc48897c3f4ac29e82dae">AV_PICTURE_TYPE_B</a>, <span class="comment">///< Bi-dir predicted</span></div>
<div class="line"><a name="l00269"></a><span class="lineno"><a class="line" href="group__lavu__picture.html#ggae6cbcab1f70d8e476757f1c1f5a0a78eac279237c3b09bb9f7ece0675658e65ad"> 269</a></span> <span class="comment"></span> <a class="code" href="group__lavu__picture.html#ggae6cbcab1f70d8e476757f1c1f5a0a78eac279237c3b09bb9f7ece0675658e65ad">AV_PICTURE_TYPE_S</a>, <span class="comment">///< S(GMC)-VOP MPEG4</span></div>
<div class="line"><a name="l00270"></a><span class="lineno"><a class="line" href="group__lavu__picture.html#ggae6cbcab1f70d8e476757f1c1f5a0a78eaa7199b8035cf5a076a05a7fcf6dfc7fe"> 270</a></span> <span class="comment"></span> <a class="code" href="group__lavu__picture.html#ggae6cbcab1f70d8e476757f1c1f5a0a78eaa7199b8035cf5a076a05a7fcf6dfc7fe">AV_PICTURE_TYPE_SI</a>, <span class="comment">///< Switching Intra</span></div>
<div class="line"><a name="l00271"></a><span class="lineno"><a class="line" href="group__lavu__picture.html#ggae6cbcab1f70d8e476757f1c1f5a0a78ea83789bae2515a1ce384a88f074244e4e"> 271</a></span> <span class="comment"></span> <a class="code" href="group__lavu__picture.html#ggae6cbcab1f70d8e476757f1c1f5a0a78ea83789bae2515a1ce384a88f074244e4e">AV_PICTURE_TYPE_SP</a>, <span class="comment">///< Switching Predicted</span></div>
<div class="line"><a name="l00272"></a><span class="lineno"><a class="line" href="group__lavu__picture.html#ggae6cbcab1f70d8e476757f1c1f5a0a78ea71f9f194b0cbe86778cb6df41b867cf3"> 272</a></span> <span class="comment"></span> <a class="code" href="group__lavu__picture.html#ggae6cbcab1f70d8e476757f1c1f5a0a78ea71f9f194b0cbe86778cb6df41b867cf3">AV_PICTURE_TYPE_BI</a>, <span class="comment">///< BI type</span></div>
<div class="line"><a name="l00273"></a><span class="lineno"> 273</span> <span class="comment"></span>};</div>
<div class="line"><a name="l00274"></a><span class="lineno"> 274</span> <span class="comment"></span></div>
<div class="line"><a name="l00275"></a><span class="lineno"> 275</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00276"></a><span class="lineno"> 276</span> <span class="comment"> * Return a single letter to describe the given picture type</span></div>
<div class="line"><a name="l00277"></a><span class="lineno"> 277</span> <span class="comment"> * pict_type.</span></div>
<div class="line"><a name="l00278"></a><span class="lineno"> 278</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00279"></a><span class="lineno"> 279</span> <span class="comment"> * @param[in] pict_type the picture type @return a single character</span></div>
<div class="line"><a name="l00280"></a><span class="lineno"> 280</span> <span class="comment"> * representing the picture type, '?' if pict_type is unknown</span></div>
<div class="line"><a name="l00281"></a><span class="lineno"> 281</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00282"></a><span class="lineno"> 282</span> <span class="keywordtype">char</span> <a class="code" href="group__lavu__picture.html#gacbf2ea8b2b89924c890ef8ec10a3d922">av_get_picture_type_char</a>(<span class="keyword">enum</span> <a class="code" href="group__lavu__picture.html#gae6cbcab1f70d8e476757f1c1f5a0a78e">AVPictureType</a> pict_type);</div>
<div class="line"><a name="l00283"></a><span class="lineno"> 283</span> <span class="comment"></span></div>
<div class="line"><a name="l00284"></a><span class="lineno"> 284</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00285"></a><span class="lineno"> 285</span> <span class="comment"> * @}</span></div>
<div class="line"><a name="l00286"></a><span class="lineno"> 286</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00287"></a><span class="lineno"> 287</span> </div>
<div class="line"><a name="l00288"></a><span class="lineno"> 288</span> <span class="preprocessor">#include "<a class="code" href="common_8h.html">common.h</a>"</span></div>
<div class="line"><a name="l00289"></a><span class="lineno"> 289</span> <span class="preprocessor">#include "<a class="code" href="error_8h.html">error.h</a>"</span></div>
<div class="line"><a name="l00290"></a><span class="lineno"> 290</span> <span class="preprocessor">#include "<a class="code" href="rational_8h.html">rational.h</a>"</span></div>
<div class="line"><a name="l00291"></a><span class="lineno"> 291</span> <span class="preprocessor">#include "<a class="code" href="libavutil_2version_8h.html">version.h</a>"</span></div>
<div class="line"><a name="l00292"></a><span class="lineno"> 292</span> <span class="preprocessor">#include "<a class="code" href="macros_8h.html">macros.h</a>"</span></div>
<div class="line"><a name="l00293"></a><span class="lineno"> 293</span> <span class="preprocessor">#include "<a class="code" href="mathematics_8h.html">mathematics.h</a>"</span></div>
<div class="line"><a name="l00294"></a><span class="lineno"> 294</span> <span class="preprocessor">#include "<a class="code" href="log_8h.html">log.h</a>"</span></div>
<div class="line"><a name="l00295"></a><span class="lineno"> 295</span> <span class="preprocessor">#include "<a class="code" href="pixfmt_8h.html">pixfmt.h</a>"</span></div>
<div class="line"><a name="l00296"></a><span class="lineno"> 296</span> <span class="comment"></span></div>
<div class="line"><a name="l00297"></a><span class="lineno"> 297</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00298"></a><span class="lineno"> 298</span> <span class="comment"> * Return x default pointer in case p is NULL.</span></div>
<div class="line"><a name="l00299"></a><span class="lineno"> 299</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00300"></a><span class="lineno"><a class="line" href="group__lavu__misc.html#ga87458dccf9ab1444c363df5fa8a3f28f"> 300</a></span> <span class="keyword">static</span> <span class="keyword">inline</span> <span class="keywordtype">void</span> *<a class="code" href="group__lavu__misc.html#ga87458dccf9ab1444c363df5fa8a3f28f">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)</div>
<div class="line"><a name="l00301"></a><span class="lineno"> 301</span> {</div>
<div class="line"><a name="l00302"></a><span class="lineno"> 302</span>  <span class="keywordflow">return</span> (<span class="keywordtype">void</span> *)(intptr_t)(p ? p : x);</div>
<div class="line"><a name="l00303"></a><span class="lineno"> 303</span> }</div>
<div class="line"><a name="l00304"></a><span class="lineno"> 304</span> <span class="comment"></span></div>
<div class="line"><a name="l00305"></a><span class="lineno"> 305</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00306"></a><span class="lineno"> 306</span> <span class="comment"> * Compute the length of an integer list.</span></div>
<div class="line"><a name="l00307"></a><span class="lineno"> 307</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00308"></a><span class="lineno"> 308</span> <span class="comment"> * @param elsize size in bytes of each list element (only 1, 2, 4 or 8)</span></div>
<div class="line"><a name="l00309"></a><span class="lineno"> 309</span> <span class="comment"> * @param term list terminator (usually 0 or -1)</span></div>
<div class="line"><a name="l00310"></a><span class="lineno"> 310</span> <span class="comment"> * @param list pointer to the list</span></div>
<div class="line"><a name="l00311"></a><span class="lineno"> 311</span> <span class="comment"> * @return length of the list, in elements, not counting the terminator</span></div>
<div class="line"><a name="l00312"></a><span class="lineno"> 312</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00313"></a><span class="lineno"> 313</span> <span class="keywordtype">unsigned</span> <a class="code" href="group__lavu__misc.html#ga7894e9b1ec8844685bc9101779c7d533">av_int_list_length_for_size</a>(<span class="keywordtype">unsigned</span> elsize,</div>
<div class="line"><a name="l00314"></a><span class="lineno"> 314</span>  <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>;</div>
<div class="line"><a name="l00315"></a><span class="lineno"> 315</span> <span class="comment"></span></div>
<div class="line"><a name="l00316"></a><span class="lineno"> 316</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00317"></a><span class="lineno"> 317</span> <span class="comment"> * Compute the length of an integer list.</span></div>
<div class="line"><a name="l00318"></a><span class="lineno"> 318</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00319"></a><span class="lineno"> 319</span> <span class="comment"> * @param term list terminator (usually 0 or -1)</span></div>
<div class="line"><a name="l00320"></a><span class="lineno"> 320</span> <span class="comment"> * @param list pointer to the list</span></div>
<div class="line"><a name="l00321"></a><span class="lineno"> 321</span> <span class="comment"> * @return length of the list, in elements, not counting the terminator</span></div>
<div class="line"><a name="l00322"></a><span class="lineno"> 322</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00323"></a><span class="lineno"><a class="line" href="group__lavu__misc.html#gaddb1ee4dba6de5845eda3e9e1e740366"> 323</a></span> <span class="preprocessor">#define av_int_list_length(list, term) \</span></div>
<div class="line"><a name="l00324"></a><span class="lineno"> 324</span> <span class="preprocessor"> av_int_list_length_for_size(sizeof(*(list)), list, term)</span></div>
<div class="line"><a name="l00325"></a><span class="lineno"> 325</span> <span class="preprocessor"></span><span class="comment"></span></div>
<div class="line"><a name="l00326"></a><span class="lineno"> 326</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00327"></a><span class="lineno"> 327</span> <span class="comment"> * Open a file using a UTF-8 filename.</span></div>
<div class="line"><a name="l00328"></a><span class="lineno"> 328</span> <span class="comment"> * The API of this function matches POSIX fopen(), errors are returned through</span></div>
<div class="line"><a name="l00329"></a><span class="lineno"> 329</span> <span class="comment"> * errno.</span></div>
<div class="line"><a name="l00330"></a><span class="lineno"> 330</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00331"></a><span class="lineno"> 331</span> FILE *<a class="code" href="group__lavu__misc.html#ga553b85a36da32c041738a89aa61f9fbd">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);</div>
<div class="line"><a name="l00332"></a><span class="lineno"> 332</span> <span class="comment"></span></div>
<div class="line"><a name="l00333"></a><span class="lineno"> 333</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00334"></a><span class="lineno"> 334</span> <span class="comment"> * Return the fractional representation of the internal time base.</span></div>
<div class="line"><a name="l00335"></a><span class="lineno"> 335</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00336"></a><span class="lineno"> 336</span> <a class="code" href="structAVRational.html">AVRational</a> <a class="code" href="group__lavu__misc.html#gab889104afd2e874f9dd2b3b78b04f3f2">av_get_time_base_q</a>(<span class="keywordtype">void</span>);</div>
<div class="line"><a name="l00337"></a><span class="lineno"> 337</span> <span class="comment"></span></div>
<div class="line"><a name="l00338"></a><span class="lineno"> 338</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00339"></a><span class="lineno"> 339</span> <span class="comment"> * @}</span></div>
<div class="line"><a name="l00340"></a><span class="lineno"> 340</span> <span class="comment"> * @}</span></div>
<div class="line"><a name="l00341"></a><span class="lineno"> 341</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00342"></a><span class="lineno"> 342</span> </div>
<div class="line"><a name="l00343"></a><span class="lineno"> 343</span> <span class="preprocessor">#endif </span><span class="comment">/* AVUTIL_AVUTIL_H */</span><span class="preprocessor"></span></div>
<div class="ttc" id="group__lavu__picture_html_ggae6cbcab1f70d8e476757f1c1f5a0a78ea71f9f194b0cbe86778cb6df41b867cf3"><div class="ttname"><a href="group__lavu__picture.html#ggae6cbcab1f70d8e476757f1c1f5a0a78ea71f9f194b0cbe86778cb6df41b867cf3">AV_PICTURE_TYPE_BI</a></div><div class="ttdoc">BI type. </div><div class="ttdef"><b>Definition:</b> <a href="avutil_8h_source.html#l00272">avutil.h:272</a></div></div>
<div class="ttc" id="group__lavu__picture_html_ggae6cbcab1f70d8e476757f1c1f5a0a78eac279237c3b09bb9f7ece0675658e65ad"><div class="ttname"><a href="group__lavu__picture.html#ggae6cbcab1f70d8e476757f1c1f5a0a78eac279237c3b09bb9f7ece0675658e65ad">AV_PICTURE_TYPE_S</a></div><div class="ttdoc">S(GMC)-VOP MPEG4. </div><div class="ttdef"><b>Definition:</b> <a href="avutil_8h_source.html#l00269">avutil.h:269</a></div></div>
<div class="ttc" id="group__lavu__ver_html_gaf75e78eac0a55a8c3736f89b018a5687"><div class="ttname"><a href="group__lavu__ver.html#gaf75e78eac0a55a8c3736f89b018a5687">avutil_configuration</a></div><div class="ttdeci">const char * avutil_configuration(void)</div><div class="ttdoc">Return the libavutil build-time configuration. </div></div>
<div class="ttc" id="attributes_8h_html_adc7fd5bb40d84900a3a30ef3318020c2"><div class="ttname"><a href="attributes_8h.html#adc7fd5bb40d84900a3a30ef3318020c2">av_pure</a></div><div class="ttdeci">#define av_pure</div><div class="ttdef"><b>Definition:</b> <a href="attributes_8h_source.html#l00070">attributes.h:70</a></div></div>
<div class="ttc" id="group__lavu__misc_html_ga553b85a36da32c041738a89aa61f9fbd"><div class="ttname"><a href="group__lavu__misc.html#ga553b85a36da32c041738a89aa61f9fbd">av_fopen_utf8</a></div><div class="ttdeci">FILE * av_fopen_utf8(const char *path, const char *mode)</div><div class="ttdoc">Open a file using a UTF-8 filename. </div></div>
<div class="ttc" id="group__lavu__picture_html_ggae6cbcab1f70d8e476757f1c1f5a0a78ea33183189d771e3325ccdd36fa980b6f6"><div class="ttname"><a href="group__lavu__picture.html#ggae6cbcab1f70d8e476757f1c1f5a0a78ea33183189d771e3325ccdd36fa980b6f6">AV_PICTURE_TYPE_NONE</a></div><div class="ttdoc">Undefined. </div><div class="ttdef"><b>Definition:</b> <a href="avutil_8h_source.html#l00265">avutil.h:265</a></div></div>
<div class="ttc" id="group__lavu__picture_html_ggae6cbcab1f70d8e476757f1c1f5a0a78eaa7199b8035cf5a076a05a7fcf6dfc7fe"><div class="ttname"><a href="group__lavu__picture.html#ggae6cbcab1f70d8e476757f1c1f5a0a78eaa7199b8035cf5a076a05a7fcf6dfc7fe">AV_PICTURE_TYPE_SI</a></div><div class="ttdoc">Switching Intra. </div><div class="ttdef"><b>Definition:</b> <a href="avutil_8h_source.html#l00270">avutil.h:270</a></div></div>
<div class="ttc" id="mathematics_8h_html"><div class="ttname"><a href="mathematics_8h.html">mathematics.h</a></div></div>
<div class="ttc" id="group__lavu__misc_html_gga9a84bba4713dfced21a1a56163be1f48a8e220e09ef38f26963e8e2ec731fb7d9"><div class="ttname"><a href="group__lavu__misc.html#gga9a84bba4713dfced21a1a56163be1f48a8e220e09ef38f26963e8e2ec731fb7d9">AVMEDIA_TYPE_NB</a></div><div class="ttdef"><b>Definition:</b> <a href="avutil_8h_source.html#l00198">avutil.h:198</a></div></div>
<div class="ttc" id="group__lavu__misc_html_gga9a84bba4713dfced21a1a56163be1f48ae3df4d77c6908fb626293c2fed215d52"><div class="ttname"><a href="group__lavu__misc.html#gga9a84bba4713dfced21a1a56163be1f48ae3df4d77c6908fb626293c2fed215d52">AVMEDIA_TYPE_DATA</a></div><div class="ttdoc">Opaque data information usually continuous. </div><div class="ttdef"><b>Definition:</b> <a href="avutil_8h_source.html#l00195">avutil.h:195</a></div></div>
<div class="ttc" id="group__lavu__picture_html_gacbf2ea8b2b89924c890ef8ec10a3d922"><div class="ttname"><a href="group__lavu__picture.html#gacbf2ea8b2b89924c890ef8ec10a3d922">av_get_picture_type_char</a></div><div class="ttdeci">char av_get_picture_type_char(enum AVPictureType pict_type)</div><div class="ttdoc">Return a single letter to describe the given picture type pict_type. </div></div>
<div class="ttc" id="group__lavu__misc_html_ga87458dccf9ab1444c363df5fa8a3f28f"><div class="ttname"><a href="group__lavu__misc.html#ga87458dccf9ab1444c363df5fa8a3f28f">av_x_if_null</a></div><div class="ttdeci">static void * av_x_if_null(const void *p, const void *x)</div><div class="ttdoc">Return x default pointer in case p is NULL. </div><div class="ttdef"><b>Definition:</b> <a href="avutil_8h_source.html#l00300">avutil.h:300</a></div></div>
<div class="ttc" id="macros_8h_html"><div class="ttname"><a href="macros_8h.html">macros.h</a></div><div class="ttdoc">Utility Preprocessor macros. </div></div>
<div class="ttc" id="group__lavu__ver_html_ga9a979c78d33d8767b51952f7f5c61541"><div class="ttname"><a href="group__lavu__ver.html#ga9a979c78d33d8767b51952f7f5c61541">avutil_version</a></div><div class="ttdeci">unsigned avutil_version(void)</div><div class="ttdoc">Return the LIBAVUTIL_VERSION_INT constant. </div></div>
<div class="ttc" id="error_8h_html"><div class="ttname"><a href="error_8h.html">error.h</a></div><div class="ttdoc">error code definitions </div></div>
<div class="ttc" id="group__lavu__misc_html_ga7894e9b1ec8844685bc9101779c7d533"><div class="ttname"><a href="group__lavu__misc.html#ga7894e9b1ec8844685bc9101779c7d533">av_int_list_length_for_size</a></div><div class="ttdeci">unsigned av_int_list_length_for_size(unsigned elsize, const void *list, uint64_t term) av_pure</div><div class="ttdoc">Compute the length of an integer list. </div></div>
<div class="ttc" id="group__lavu__misc_html_gga9a84bba4713dfced21a1a56163be1f48a7b4e33b8f30ac94d34ce8d9f7c33927a"><div class="ttname"><a href="group__lavu__misc.html#gga9a84bba4713dfced21a1a56163be1f48a7b4e33b8f30ac94d34ce8d9f7c33927a">AVMEDIA_TYPE_AUDIO</a></div><div class="ttdef"><b>Definition:</b> <a href="avutil_8h_source.html#l00194">avutil.h:194</a></div></div>
<div class="ttc" id="libavutil_2version_8h_html"><div class="ttname"><a href="libavutil_2version_8h.html">version.h</a></div><div class="ttdoc">Libavutil version macros. </div></div>
<div class="ttc" id="group__lavu__picture_html_ggae6cbcab1f70d8e476757f1c1f5a0a78ea02be39f151a8ace7a65c86e13053e817"><div class="ttname"><a href="group__lavu__picture.html#ggae6cbcab1f70d8e476757f1c1f5a0a78ea02be39f151a8ace7a65c86e13053e817">AV_PICTURE_TYPE_I</a></div><div class="ttdoc">Intra. </div><div class="ttdef"><b>Definition:</b> <a href="avutil_8h_source.html#l00266">avutil.h:266</a></div></div>
<div class="ttc" id="group__lavu__ver_html_gabaea9f86706819534baceeac7ea5818a"><div class="ttname"><a href="group__lavu__ver.html#gabaea9f86706819534baceeac7ea5818a">av_version_info</a></div><div class="ttdeci">const char * av_version_info(void)</div><div class="ttdoc">Return an informative version string. </div></div>
<div class="ttc" id="group__lavu__misc_html_gga9a84bba4713dfced21a1a56163be1f48afdadbd6c4f612c59f6b6c7c6f84fd347"><div class="ttname"><a href="group__lavu__misc.html#gga9a84bba4713dfced21a1a56163be1f48afdadbd6c4f612c59f6b6c7c6f84fd347">AVMEDIA_TYPE_UNKNOWN</a></div><div class="ttdoc">Usually treated as AVMEDIA_TYPE_DATA. </div><div class="ttdef"><b>Definition:</b> <a href="avutil_8h_source.html#l00192">avutil.h:192</a></div></div>
<div class="ttc" id="group__lavu__misc_html_gga9a84bba4713dfced21a1a56163be1f48a2d09f16df8631e64e8fa566142cdc99d"><div class="ttname"><a href="group__lavu__misc.html#gga9a84bba4713dfced21a1a56163be1f48a2d09f16df8631e64e8fa566142cdc99d">AVMEDIA_TYPE_ATTACHMENT</a></div><div class="ttdoc">Opaque data information usually sparse. </div><div class="ttdef"><b>Definition:</b> <a href="avutil_8h_source.html#l00197">avutil.h:197</a></div></div>
<div class="ttc" id="group__lavu__ver_html_ga88957e92f27b9d3fca0ec8cf43303b72"><div class="ttname"><a href="group__lavu__ver.html#ga88957e92f27b9d3fca0ec8cf43303b72">avutil_license</a></div><div class="ttdeci">const char * avutil_license(void)</div><div class="ttdoc">Return the libavutil license. </div></div>
<div class="ttc" id="group__lavu__picture_html_ggae6cbcab1f70d8e476757f1c1f5a0a78ea83789bae2515a1ce384a88f074244e4e"><div class="ttname"><a href="group__lavu__picture.html#ggae6cbcab1f70d8e476757f1c1f5a0a78ea83789bae2515a1ce384a88f074244e4e">AV_PICTURE_TYPE_SP</a></div><div class="ttdoc">Switching Predicted. </div><div class="ttdef"><b>Definition:</b> <a href="avutil_8h_source.html#l00271">avutil.h:271</a></div></div>
<div class="ttc" id="structAVRational_html"><div class="ttname"><a href="structAVRational.html">AVRational</a></div><div class="ttdoc">rational number numerator/denominator </div><div class="ttdef"><b>Definition:</b> <a href="rational_8h_source.html#l00043">rational.h:43</a></div></div>
<div class="ttc" id="group__lavu__misc_html_ga9a84bba4713dfced21a1a56163be1f48"><div class="ttname"><a href="group__lavu__misc.html#ga9a84bba4713dfced21a1a56163be1f48">AVMediaType</a></div><div class="ttdeci">AVMediaType</div><div class="ttdef"><b>Definition:</b> <a href="avutil_8h_source.html#l00191">avutil.h:191</a></div></div>
<div class="ttc" id="group__lavu__picture_html_gae6cbcab1f70d8e476757f1c1f5a0a78e"><div class="ttname"><a href="group__lavu__picture.html#gae6cbcab1f70d8e476757f1c1f5a0a78e">AVPictureType</a></div><div class="ttdeci">AVPictureType</div><div class="ttdef"><b>Definition:</b> <a href="avutil_8h_source.html#l00264">avutil.h:264</a></div></div>
<div class="ttc" id="group__lavu__misc_html_gab889104afd2e874f9dd2b3b78b04f3f2"><div class="ttname"><a href="group__lavu__misc.html#gab889104afd2e874f9dd2b3b78b04f3f2">av_get_time_base_q</a></div><div class="ttdeci">AVRational av_get_time_base_q(void)</div><div class="ttdoc">Return the fractional representation of the internal time base. </div></div>
<div class="ttc" id="group__lavu__misc_html_gaf21645cfa855b2caf9699d7dc7b2d08e"><div class="ttname"><a href="group__lavu__misc.html#gaf21645cfa855b2caf9699d7dc7b2d08e">av_get_media_type_string</a></div><div class="ttdeci">const char * av_get_media_type_string(enum AVMediaType media_type)</div><div class="ttdoc">Return a string describing the media_type enum, NULL if media_type is unknown. </div></div>
<div class="ttc" id="common_8h_html"><div class="ttname"><a href="common_8h.html">common.h</a></div><div class="ttdoc">common internal and external API header </div></div>
<div class="ttc" id="rational_8h_html"><div class="ttname"><a href="rational_8h.html">rational.h</a></div><div class="ttdoc">rational numbers </div></div>
<div class="ttc" id="group__lavu__picture_html_ggae6cbcab1f70d8e476757f1c1f5a0a78ead22f8968e99bc48897c3f4ac29e82dae"><div class="ttname"><a href="group__lavu__picture.html#ggae6cbcab1f70d8e476757f1c1f5a0a78ead22f8968e99bc48897c3f4ac29e82dae">AV_PICTURE_TYPE_B</a></div><div class="ttdoc">Bi-dir predicted. </div><div class="ttdef"><b>Definition:</b> <a href="avutil_8h_source.html#l00268">avutil.h:268</a></div></div>
<div class="ttc" id="pixfmt_8h_html"><div class="ttname"><a href="pixfmt_8h.html">pixfmt.h</a></div><div class="ttdoc">pixel format definitions </div></div>
<div class="ttc" id="log_8h_html"><div class="ttname"><a href="log_8h.html">log.h</a></div></div>
<div class="ttc" id="group__lavu__misc_html_gga9a84bba4713dfced21a1a56163be1f48ac1a46f59be5c6c2d3412ab172d6b8cf5"><div class="ttname"><a href="group__lavu__misc.html#gga9a84bba4713dfced21a1a56163be1f48ac1a46f59be5c6c2d3412ab172d6b8cf5">AVMEDIA_TYPE_VIDEO</a></div><div class="ttdef"><b>Definition:</b> <a href="avutil_8h_source.html#l00193">avutil.h:193</a></div></div>
<div class="ttc" id="group__lavu__misc_html_gga9a84bba4713dfced21a1a56163be1f48aa64a67386a9c53360744b86e4707b831"><div class="ttname"><a href="group__lavu__misc.html#gga9a84bba4713dfced21a1a56163be1f48aa64a67386a9c53360744b86e4707b831">AVMEDIA_TYPE_SUBTITLE</a></div><div class="ttdef"><b>Definition:</b> <a href="avutil_8h_source.html#l00196">avutil.h:196</a></div></div>
<div class="ttc" id="group__lavu__picture_html_ggae6cbcab1f70d8e476757f1c1f5a0a78eaa6fc0479507a03f173f07fc75dab2193"><div class="ttname"><a href="group__lavu__picture.html#ggae6cbcab1f70d8e476757f1c1f5a0a78eaa6fc0479507a03f173f07fc75dab2193">AV_PICTURE_TYPE_P</a></div><div class="ttdoc">Predicted. </div><div class="ttdef"><b>Definition:</b> <a href="avutil_8h_source.html#l00267">avutil.h:267</a></div></div>
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