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<div class="title">decoding_encoding.c</div> </div>
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<a href="decoding__encoding_8c.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) 2001 Fabrice Bellard</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"> * Permission is hereby granted, free of charge, to any person obtaining a copy</span></div>
<div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment"> * of this software and associated documentation files (the "Software"), to deal</span></div>
<div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment"> * in the Software without restriction, including without limitation the rights</span></div>
<div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment"> * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell</span></div>
<div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment"> * copies of the Software, and to permit persons to whom the Software is</span></div>
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment"> * furnished to do so, subject to the following conditions:</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"> * The above copyright notice and this permission notice shall be included in</span></div>
<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment"> * all copies or substantial portions of the Software.</span></div>
<div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="comment"> * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR</span></div>
<div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="comment"> * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,</span></div>
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="comment"> * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL</span></div>
<div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="comment"> * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER</span></div>
<div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="comment"> * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,</span></div>
<div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="comment"> * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN</span></div>
<div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="comment"> * THE SOFTWARE.</span></div>
<div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="comment"></span></div>
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="comment"> * @file</span></div>
<div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="comment"> * libavcodec API use example.</span></div>
<div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="comment"> * @example decoding_encoding.c</span></div>
<div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="comment"> * Note that libavcodec only handles codecs (mpeg, mpeg4, etc...),</span></div>
<div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="comment"> * not file formats (avi, vob, mp4, mov, mkv, mxf, flv, mpegts, mpegps, etc...). See library 'libavformat' for the</span></div>
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="comment"> * format handling</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> </div>
<div class="line"><a name="l00033"></a><span class="lineno"> 33</span> <span class="preprocessor">#include <math.h></span></div>
<div class="line"><a name="l00034"></a><span class="lineno"> 34</span> </div>
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span> <span class="preprocessor">#include <<a class="code" href="opt_8h.html">libavutil/opt.h</a>></span></div>
<div class="line"><a name="l00036"></a><span class="lineno"> 36</span> <span class="preprocessor">#include <<a class="code" href="avcodec_8h.html">libavcodec/avcodec.h</a>></span></div>
<div class="line"><a name="l00037"></a><span class="lineno"> 37</span> <span class="preprocessor">#include <<a class="code" href="channel__layout_8h.html">libavutil/channel_layout.h</a>></span></div>
<div class="line"><a name="l00038"></a><span class="lineno"> 38</span> <span class="preprocessor">#include <<a class="code" href="common_8h.html">libavutil/common.h</a>></span></div>
<div class="line"><a name="l00039"></a><span class="lineno"> 39</span> <span class="preprocessor">#include <<a class="code" href="imgutils_8h.html">libavutil/imgutils.h</a>></span></div>
<div class="line"><a name="l00040"></a><span class="lineno"> 40</span> <span class="preprocessor">#include <<a class="code" href="mathematics_8h.html">libavutil/mathematics.h</a>></span></div>
<div class="line"><a name="l00041"></a><span class="lineno"> 41</span> <span class="preprocessor">#include <<a class="code" href="samplefmt_8h.html">libavutil/samplefmt.h</a>></span></div>
<div class="line"><a name="l00042"></a><span class="lineno"> 42</span> </div>
<div class="line"><a name="l00043"></a><span class="lineno"><a class="line" href="decoding__encoding_8c.html#a6378f14810330164b7fb66f3334b2a27"> 43</a></span> <span class="preprocessor">#define INBUF_SIZE 4096</span></div>
<div class="line"><a name="l00044"></a><span class="lineno"><a class="line" href="decoding__encoding_8c.html#a3a513b5612784dd20c0dfbdf456abd01"> 44</a></span> <span class="preprocessor"></span><span class="preprocessor">#define AUDIO_INBUF_SIZE 20480</span></div>
<div class="line"><a name="l00045"></a><span class="lineno"><a class="line" href="decoding__encoding_8c.html#aebbadad5d16117f57006e8358ebf1ccc"> 45</a></span> <span class="preprocessor"></span><span class="preprocessor">#define AUDIO_REFILL_THRESH 4096</span></div>
<div class="line"><a name="l00046"></a><span class="lineno"> 46</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00047"></a><span class="lineno"> 47</span> <span class="comment">/* check that a given sample format is supported by the encoder */</span></div>
<div class="line"><a name="l00048"></a><span class="lineno"><a class="line" href="decoding__encoding_8c.html#a93df45821682fdbabbc0092abff0bd61"> 48</a></span> <span class="keyword">static</span> <span class="keywordtype">int</span> <a class="code" href="decoding__encoding_8c.html#a93df45821682fdbabbc0092abff0bd61">check_sample_fmt</a>(<a class="code" href="structAVCodec.html">AVCodec</a> *codec, <span class="keyword">enum</span> <a class="code" href="group__lavu__sampfmts.html#gaf9a51ca15301871723577c730b5865c5">AVSampleFormat</a> sample_fmt)</div>
<div class="line"><a name="l00049"></a><span class="lineno"> 49</span> {</div>
<div class="line"><a name="l00050"></a><span class="lineno"> 50</span>  <span class="keyword">const</span> <span class="keyword">enum</span> <a class="code" href="group__lavu__sampfmts.html#gaf9a51ca15301871723577c730b5865c5">AVSampleFormat</a> *p = codec-><a class="code" href="structAVCodec.html#aac19f4c45370f715412ad5c7b78daacf">sample_fmts</a>;</div>
<div class="line"><a name="l00051"></a><span class="lineno"> 51</span> </div>
<div class="line"><a name="l00052"></a><span class="lineno"> 52</span>  <span class="keywordflow">while</span> (*p != <a class="code" href="group__lavu__sampfmts.html#ggaf9a51ca15301871723577c730b5865c5ac5d4bb5b0fb0dc7316fb3c7a73029912">AV_SAMPLE_FMT_NONE</a>) {</div>
<div class="line"><a name="l00053"></a><span class="lineno"> 53</span>  <span class="keywordflow">if</span> (*p == sample_fmt)</div>
<div class="line"><a name="l00054"></a><span class="lineno"> 54</span>  <span class="keywordflow">return</span> 1;</div>
<div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  p++;</div>
<div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  }</div>
<div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  <span class="keywordflow">return</span> 0;</div>
<div class="line"><a name="l00058"></a><span class="lineno"> 58</span> }</div>
<div class="line"><a name="l00059"></a><span class="lineno"> 59</span> </div>
<div class="line"><a name="l00060"></a><span class="lineno"> 60</span> <span class="comment">/* just pick the highest supported samplerate */</span></div>
<div class="line"><a name="l00061"></a><span class="lineno"><a class="line" href="decoding__encoding_8c.html#a5809ff9edcce25b26466e3c806bf9854"> 61</a></span> <span class="keyword">static</span> <span class="keywordtype">int</span> <a class="code" href="decoding__encoding_8c.html#a5809ff9edcce25b26466e3c806bf9854">select_sample_rate</a>(<a class="code" href="structAVCodec.html">AVCodec</a> *codec)</div>
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span> {</div>
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> *p;</div>
<div class="line"><a name="l00064"></a><span class="lineno"> 64</span>  <span class="keywordtype">int</span> best_samplerate = 0;</div>
<div class="line"><a name="l00065"></a><span class="lineno"> 65</span> </div>
<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  <span class="keywordflow">if</span> (!codec-><a class="code" href="structAVCodec.html#aee7a194f1c3251958d3dabed3fa8148e">supported_samplerates</a>)</div>
<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  <span class="keywordflow">return</span> 44100;</div>
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span> </div>
<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  p = codec-><a class="code" href="structAVCodec.html#aee7a194f1c3251958d3dabed3fa8148e">supported_samplerates</a>;</div>
<div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  <span class="keywordflow">while</span> (*p) {</div>
<div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  best_samplerate = <a class="code" href="common_8h.html#a9960bd6780a9b16a216a57be1ee04359">FFMAX</a>(*p, best_samplerate);</div>
<div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  p++;</div>
<div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  }</div>
<div class="line"><a name="l00074"></a><span class="lineno"> 74</span>  <span class="keywordflow">return</span> best_samplerate;</div>
<div class="line"><a name="l00075"></a><span class="lineno"> 75</span> }</div>
<div class="line"><a name="l00076"></a><span class="lineno"> 76</span> </div>
<div class="line"><a name="l00077"></a><span class="lineno"> 77</span> <span class="comment">/* select layout with the highest channel count */</span></div>
<div class="line"><a name="l00078"></a><span class="lineno"><a class="line" href="decoding__encoding_8c.html#ae6bb0fc8f05c78c13e9d38605038d994"> 78</a></span> <span class="keyword">static</span> <span class="keywordtype">int</span> <a class="code" href="decoding__encoding_8c.html#ae6bb0fc8f05c78c13e9d38605038d994">select_channel_layout</a>(<a class="code" href="structAVCodec.html">AVCodec</a> *codec)</div>
<div class="line"><a name="l00079"></a><span class="lineno"> 79</span> {</div>
<div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  <span class="keyword">const</span> uint64_t *p;</div>
<div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  uint64_t best_ch_layout = 0;</div>
<div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  <span class="keywordtype">int</span> best_nb_channels = 0;</div>
<div class="line"><a name="l00083"></a><span class="lineno"> 83</span> </div>
<div class="line"><a name="l00084"></a><span class="lineno"> 84</span>  <span class="keywordflow">if</span> (!codec-><a class="code" href="structAVCodec.html#a1d4c5152626bbd1f575a3e0014cb59e7">channel_layouts</a>)</div>
<div class="line"><a name="l00085"></a><span class="lineno"> 85</span>  <span class="keywordflow">return</span> <a class="code" href="group__channel__mask__c.html#gabc6d6651bba254cd0fa2c42a57228e65">AV_CH_LAYOUT_STEREO</a>;</div>
<div class="line"><a name="l00086"></a><span class="lineno"> 86</span> </div>
<div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  p = codec-><a class="code" href="structAVCodec.html#a1d4c5152626bbd1f575a3e0014cb59e7">channel_layouts</a>;</div>
<div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  <span class="keywordflow">while</span> (*p) {</div>
<div class="line"><a name="l00089"></a><span class="lineno"> 89</span>  <span class="keywordtype">int</span> nb_channels = <a class="code" href="group__channel__mask__c.html#gac95619abeb32e4a3daa18e3ff3419380">av_get_channel_layout_nb_channels</a>(*p);</div>
<div class="line"><a name="l00090"></a><span class="lineno"> 90</span> </div>
<div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  <span class="keywordflow">if</span> (nb_channels > best_nb_channels) {</div>
<div class="line"><a name="l00092"></a><span class="lineno"> 92</span>  best_ch_layout = *p;</div>
<div class="line"><a name="l00093"></a><span class="lineno"> 93</span>  best_nb_channels = nb_channels;</div>
<div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  }</div>
<div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  p++;</div>
<div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  }</div>
<div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  <span class="keywordflow">return</span> best_ch_layout;</div>
<div class="line"><a name="l00098"></a><span class="lineno"> 98</span> }</div>
<div class="line"><a name="l00099"></a><span class="lineno"> 99</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"> * Audio encoding example</span></div>
<div class="line"><a name="l00102"></a><span class="lineno"> 102</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00103"></a><span class="lineno"><a class="line" href="decoding__encoding_8c.html#a67ded2b27004b72c27d4f3500a578ff6"> 103</a></span> <span class="keyword">static</span> <span class="keywordtype">void</span> <a class="code" href="decoding__encoding_8c.html#a67ded2b27004b72c27d4f3500a578ff6">audio_encode_example</a>(<span class="keyword">const</span> <span class="keywordtype">char</span> *filename)</div>
<div class="line"><a name="l00104"></a><span class="lineno"> 104</span> {</div>
<div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  <a class="code" href="structAVCodec.html">AVCodec</a> *codec;</div>
<div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  <a class="code" href="structAVCodecContext.html">AVCodecContext</a> *c= NULL;</div>
<div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  <a class="code" href="structAVFrame.html">AVFrame</a> *<a class="code" href="demuxing__decoding_8c.html#ad7d33d579a8d4241a5e643e39287a209">frame</a>;</div>
<div class="line"><a name="l00108"></a><span class="lineno"> 108</span>  <a class="code" href="structAVPacket.html">AVPacket</a> <a class="code" href="demuxing__decoding_8c.html#a3d4c6562f0b27cf0cacbbea5c038c090">pkt</a>;</div>
<div class="line"><a name="l00109"></a><span class="lineno"> 109</span>  <span class="keywordtype">int</span> i, j, k, ret, got_output;</div>
<div class="line"><a name="l00110"></a><span class="lineno"> 110</span>  <span class="keywordtype">int</span> buffer_size;</div>
<div class="line"><a name="l00111"></a><span class="lineno"> 111</span>  FILE *f;</div>
<div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  uint16_t *samples;</div>
<div class="line"><a name="l00113"></a><span class="lineno"> 113</span>  <span class="keywordtype">float</span> t, tincr;</div>
<div class="line"><a name="l00114"></a><span class="lineno"> 114</span> </div>
<div class="line"><a name="l00115"></a><span class="lineno"> 115</span>  printf(<span class="stringliteral">"Encode audio file %s\n"</span>, filename);</div>
<div class="line"><a name="l00116"></a><span class="lineno"> 116</span> </div>
<div class="line"><a name="l00117"></a><span class="lineno"> 117</span>  <span class="comment">/* find the MP2 encoder */</span></div>
<div class="line"><a name="l00118"></a><span class="lineno"> 118</span>  codec = <a class="code" href="group__lavc__encoding.html#ga9f820c481615c3a02d0407bac0bdbf25">avcodec_find_encoder</a>(<a class="code" href="group__lavc__core.html#ggaadca229ad2c20e060a14fec08a5cc7cea90ffce5aedda33269b22221916cd8487">AV_CODEC_ID_MP2</a>);</div>
<div class="line"><a name="l00119"></a><span class="lineno"> 119</span>  <span class="keywordflow">if</span> (!codec) {</div>
<div class="line"><a name="l00120"></a><span class="lineno"> 120</span>  fprintf(stderr, <span class="stringliteral">"Codec not found\n"</span>);</div>
<div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  exit(1);</div>
<div class="line"><a name="l00122"></a><span class="lineno"> 122</span>  }</div>
<div class="line"><a name="l00123"></a><span class="lineno"> 123</span> </div>
<div class="line"><a name="l00124"></a><span class="lineno"> 124</span>  c = <a class="code" href="group__lavc__core.html#gae80afec6f26df6607eaacf39b561c315">avcodec_alloc_context3</a>(codec);</div>
<div class="line"><a name="l00125"></a><span class="lineno"> 125</span>  <span class="keywordflow">if</span> (!c) {</div>
<div class="line"><a name="l00126"></a><span class="lineno"> 126</span>  fprintf(stderr, <span class="stringliteral">"Could not allocate audio codec context\n"</span>);</div>
<div class="line"><a name="l00127"></a><span class="lineno"> 127</span>  exit(1);</div>
<div class="line"><a name="l00128"></a><span class="lineno"> 128</span>  }</div>
<div class="line"><a name="l00129"></a><span class="lineno"> 129</span> </div>
<div class="line"><a name="l00130"></a><span class="lineno"> 130</span>  <span class="comment">/* put sample parameters */</span></div>
<div class="line"><a name="l00131"></a><span class="lineno"> 131</span>  c-><a class="code" href="structAVCodecContext.html#a6b53fda85ad61baa345edbd96cb8a33c">bit_rate</a> = 64000;</div>
<div class="line"><a name="l00132"></a><span class="lineno"> 132</span> </div>
<div class="line"><a name="l00133"></a><span class="lineno"> 133</span>  <span class="comment">/* check that the encoder supports s16 pcm input */</span></div>
<div class="line"><a name="l00134"></a><span class="lineno"> 134</span>  c-><a class="code" href="structAVCodecContext.html#a1bdba69ea111e2a9d03fdaa7a46a4c45">sample_fmt</a> = <a class="code" href="group__lavu__sampfmts.html#ggaf9a51ca15301871723577c730b5865c5aea6132df57aebc3f76e10665395c46af">AV_SAMPLE_FMT_S16</a>;</div>
<div class="line"><a name="l00135"></a><span class="lineno"> 135</span>  <span class="keywordflow">if</span> (!<a class="code" href="decoding__encoding_8c.html#a93df45821682fdbabbc0092abff0bd61">check_sample_fmt</a>(codec, c-><a class="code" href="structAVCodecContext.html#a1bdba69ea111e2a9d03fdaa7a46a4c45">sample_fmt</a>)) {</div>
<div class="line"><a name="l00136"></a><span class="lineno"> 136</span>  fprintf(stderr, <span class="stringliteral">"Encoder does not support sample format %s"</span>,</div>
<div class="line"><a name="l00137"></a><span class="lineno"> 137</span>  <a class="code" href="group__lavu__sampfmts.html#ga31b9d149b2de9821a65f4f5612970838">av_get_sample_fmt_name</a>(c-><a class="code" href="structAVCodecContext.html#a1bdba69ea111e2a9d03fdaa7a46a4c45">sample_fmt</a>));</div>
<div class="line"><a name="l00138"></a><span class="lineno"> 138</span>  exit(1);</div>
<div class="line"><a name="l00139"></a><span class="lineno"> 139</span>  }</div>
<div class="line"><a name="l00140"></a><span class="lineno"> 140</span> </div>
<div class="line"><a name="l00141"></a><span class="lineno"> 141</span>  <span class="comment">/* select other audio parameters supported by the encoder */</span></div>
<div class="line"><a name="l00142"></a><span class="lineno"> 142</span>  c-><a class="code" href="structAVCodecContext.html#a8ff0b000c463361e234af48d03aadfc0">sample_rate</a> = <a class="code" href="decoding__encoding_8c.html#a5809ff9edcce25b26466e3c806bf9854">select_sample_rate</a>(codec);</div>
<div class="line"><a name="l00143"></a><span class="lineno"> 143</span>  c-><a class="code" href="structAVCodecContext.html#aeb08c575a79eb84fc4155dda88f46c06">channel_layout</a> = <a class="code" href="decoding__encoding_8c.html#ae6bb0fc8f05c78c13e9d38605038d994">select_channel_layout</a>(codec);</div>
<div class="line"><a name="l00144"></a><span class="lineno"> 144</span>  c-><a class="code" href="structAVCodecContext.html#ac1e6c2cd1269caa7570575725c682a49">channels</a> = <a class="code" href="group__channel__mask__c.html#gac95619abeb32e4a3daa18e3ff3419380">av_get_channel_layout_nb_channels</a>(c-><a class="code" href="structAVCodecContext.html#aeb08c575a79eb84fc4155dda88f46c06">channel_layout</a>);</div>
<div class="line"><a name="l00145"></a><span class="lineno"> 145</span> </div>
<div class="line"><a name="l00146"></a><span class="lineno"> 146</span>  <span class="comment">/* open it */</span></div>
<div class="line"><a name="l00147"></a><span class="lineno"> 147</span>  <span class="keywordflow">if</span> (<a class="code" href="group__lavc__core.html#ga11f785a188d7d9df71621001465b0f1d">avcodec_open2</a>(c, codec, NULL) < 0) {</div>
<div class="line"><a name="l00148"></a><span class="lineno"> 148</span>  fprintf(stderr, <span class="stringliteral">"Could not open codec\n"</span>);</div>
<div class="line"><a name="l00149"></a><span class="lineno"> 149</span>  exit(1);</div>
<div class="line"><a name="l00150"></a><span class="lineno"> 150</span>  }</div>
<div class="line"><a name="l00151"></a><span class="lineno"> 151</span> </div>
<div class="line"><a name="l00152"></a><span class="lineno"> 152</span>  f = fopen(filename, <span class="stringliteral">"wb"</span>);</div>
<div class="line"><a name="l00153"></a><span class="lineno"> 153</span>  <span class="keywordflow">if</span> (!f) {</div>
<div class="line"><a name="l00154"></a><span class="lineno"> 154</span>  fprintf(stderr, <span class="stringliteral">"Could not open %s\n"</span>, filename);</div>
<div class="line"><a name="l00155"></a><span class="lineno"> 155</span>  exit(1);</div>
<div class="line"><a name="l00156"></a><span class="lineno"> 156</span>  }</div>
<div class="line"><a name="l00157"></a><span class="lineno"> 157</span> </div>
<div class="line"><a name="l00158"></a><span class="lineno"> 158</span>  <span class="comment">/* frame containing input raw audio */</span></div>
<div class="line"><a name="l00159"></a><span class="lineno"> 159</span>  frame = <a class="code" href="group__lavu__frame.html#gac700017c5270c79c1e1befdeeb008b2f">av_frame_alloc</a>();</div>
<div class="line"><a name="l00160"></a><span class="lineno"> 160</span>  <span class="keywordflow">if</span> (!frame) {</div>
<div class="line"><a name="l00161"></a><span class="lineno"> 161</span>  fprintf(stderr, <span class="stringliteral">"Could not allocate audio frame\n"</span>);</div>
<div class="line"><a name="l00162"></a><span class="lineno"> 162</span>  exit(1);</div>
<div class="line"><a name="l00163"></a><span class="lineno"> 163</span>  }</div>
<div class="line"><a name="l00164"></a><span class="lineno"> 164</span> </div>
<div class="line"><a name="l00165"></a><span class="lineno"> 165</span>  frame-><a class="code" href="structAVFrame.html#a02f45ab8191aea1660159f1e464237ea">nb_samples</a> = c-><a class="code" href="structAVCodecContext.html#aec57f0d859a6df8b479cd93ca3a44a33">frame_size</a>;</div>
<div class="line"><a name="l00166"></a><span class="lineno"> 166</span>  frame-><a class="code" href="structAVFrame.html#aed14fa772ce46881020fd1545c86432c">format</a> = c-><a class="code" href="structAVCodecContext.html#a1bdba69ea111e2a9d03fdaa7a46a4c45">sample_fmt</a>;</div>
<div class="line"><a name="l00167"></a><span class="lineno"> 167</span>  frame-><a class="code" href="structAVFrame.html#a5f343e0325e3e9d9ed20e34c9e156aef">channel_layout</a> = c-><a class="code" href="structAVCodecContext.html#aeb08c575a79eb84fc4155dda88f46c06">channel_layout</a>;</div>
<div class="line"><a name="l00168"></a><span class="lineno"> 168</span> </div>
<div class="line"><a name="l00169"></a><span class="lineno"> 169</span>  <span class="comment">/* the codec gives us the frame size, in samples,</span></div>
<div class="line"><a name="l00170"></a><span class="lineno"> 170</span> <span class="comment"> * we calculate the size of the samples buffer in bytes */</span></div>
<div class="line"><a name="l00171"></a><span class="lineno"> 171</span>  buffer_size = <a class="code" href="group__lavu__sampfmts.html#gaa7368bc4e3a366b688e81938ed55eb06">av_samples_get_buffer_size</a>(NULL, c-><a class="code" href="structAVCodecContext.html#ac1e6c2cd1269caa7570575725c682a49">channels</a>, c-><a class="code" href="structAVCodecContext.html#aec57f0d859a6df8b479cd93ca3a44a33">frame_size</a>,</div>
<div class="line"><a name="l00172"></a><span class="lineno"> 172</span>  c-><a class="code" href="structAVCodecContext.html#a1bdba69ea111e2a9d03fdaa7a46a4c45">sample_fmt</a>, 0);</div>
<div class="line"><a name="l00173"></a><span class="lineno"> 173</span>  <span class="keywordflow">if</span> (buffer_size < 0) {</div>
<div class="line"><a name="l00174"></a><span class="lineno"> 174</span>  fprintf(stderr, <span class="stringliteral">"Could not get sample buffer size\n"</span>);</div>
<div class="line"><a name="l00175"></a><span class="lineno"> 175</span>  exit(1);</div>
<div class="line"><a name="l00176"></a><span class="lineno"> 176</span>  }</div>
<div class="line"><a name="l00177"></a><span class="lineno"> 177</span>  samples = <a class="code" href="group__lavu__mem.html#ga9722446c5e310ffedfaac9489864796d">av_malloc</a>(buffer_size);</div>
<div class="line"><a name="l00178"></a><span class="lineno"> 178</span>  <span class="keywordflow">if</span> (!samples) {</div>
<div class="line"><a name="l00179"></a><span class="lineno"> 179</span>  fprintf(stderr, <span class="stringliteral">"Could not allocate %d bytes for samples buffer\n"</span>,</div>
<div class="line"><a name="l00180"></a><span class="lineno"> 180</span>  buffer_size);</div>
<div class="line"><a name="l00181"></a><span class="lineno"> 181</span>  exit(1);</div>
<div class="line"><a name="l00182"></a><span class="lineno"> 182</span>  }</div>
<div class="line"><a name="l00183"></a><span class="lineno"> 183</span>  <span class="comment">/* setup the data pointers in the AVFrame */</span></div>
<div class="line"><a name="l00184"></a><span class="lineno"> 184</span>  ret = <a class="code" href="group__lavc__misc.html#ga66b44aad56fa22a78fb8916eb8cc0516">avcodec_fill_audio_frame</a>(frame, c-><a class="code" href="structAVCodecContext.html#ac1e6c2cd1269caa7570575725c682a49">channels</a>, c-><a class="code" href="structAVCodecContext.html#a1bdba69ea111e2a9d03fdaa7a46a4c45">sample_fmt</a>,</div>
<div class="line"><a name="l00185"></a><span class="lineno"> 185</span>  (<span class="keyword">const</span> uint8_t*)samples, buffer_size, 0);</div>
<div class="line"><a name="l00186"></a><span class="lineno"> 186</span>  <span class="keywordflow">if</span> (ret < 0) {</div>
<div class="line"><a name="l00187"></a><span class="lineno"> 187</span>  fprintf(stderr, <span class="stringliteral">"Could not setup audio frame\n"</span>);</div>
<div class="line"><a name="l00188"></a><span class="lineno"> 188</span>  exit(1);</div>
<div class="line"><a name="l00189"></a><span class="lineno"> 189</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"> 191</span>  <span class="comment">/* encode a single tone sound */</span></div>
<div class="line"><a name="l00192"></a><span class="lineno"> 192</span>  t = 0;</div>
<div class="line"><a name="l00193"></a><span class="lineno"> 193</span>  tincr = 2 * <a class="code" href="mathematics_8h.html#ae71449b1cc6e6250b91f539153a7a0d3">M_PI</a> * 440.0 / c-><a class="code" href="structAVCodecContext.html#a8ff0b000c463361e234af48d03aadfc0">sample_rate</a>;</div>
<div class="line"><a name="l00194"></a><span class="lineno"> 194</span>  <span class="keywordflow">for</span> (i = 0; i < 200; i++) {</div>
<div class="line"><a name="l00195"></a><span class="lineno"> 195</span>  <a class="code" href="group__lavc__packet.html#gac9cb9756175b96e7441575803757fb73">av_init_packet</a>(&pkt);</div>
<div class="line"><a name="l00196"></a><span class="lineno"> 196</span>  pkt.<a class="code" href="structAVPacket.html#aaf4fe58dfcc7c232c1f2268b539d8367">data</a> = NULL; <span class="comment">// packet data will be allocated by the encoder</span></div>
<div class="line"><a name="l00197"></a><span class="lineno"> 197</span>  pkt.<a class="code" href="structAVPacket.html#a4d1ea19f63eb107111fd650ca514d1f4">size</a> = 0;</div>
<div class="line"><a name="l00198"></a><span class="lineno"> 198</span> </div>
<div class="line"><a name="l00199"></a><span class="lineno"> 199</span>  <span class="keywordflow">for</span> (j = 0; j < c-><a class="code" href="structAVCodecContext.html#aec57f0d859a6df8b479cd93ca3a44a33">frame_size</a>; j++) {</div>
<div class="line"><a name="l00200"></a><span class="lineno"> 200</span>  samples[2*j] = (int)(sin(t) * 10000);</div>
<div class="line"><a name="l00201"></a><span class="lineno"> 201</span> </div>
<div class="line"><a name="l00202"></a><span class="lineno"> 202</span>  <span class="keywordflow">for</span> (k = 1; k < c-><a class="code" href="structAVCodecContext.html#ac1e6c2cd1269caa7570575725c682a49">channels</a>; k++)</div>
<div class="line"><a name="l00203"></a><span class="lineno"> 203</span>  samples[2*j + k] = samples[2*j];</div>
<div class="line"><a name="l00204"></a><span class="lineno"> 204</span>  t += tincr;</div>
<div class="line"><a name="l00205"></a><span class="lineno"> 205</span>  }</div>
<div class="line"><a name="l00206"></a><span class="lineno"> 206</span>  <span class="comment">/* encode the samples */</span></div>
<div class="line"><a name="l00207"></a><span class="lineno"> 207</span>  ret = <a class="code" href="group__lavc__encoding.html#ga93a49fbd0973b216dcb8a8c5dffe1d82">avcodec_encode_audio2</a>(c, &pkt, frame, &got_output);</div>
<div class="line"><a name="l00208"></a><span class="lineno"> 208</span>  <span class="keywordflow">if</span> (ret < 0) {</div>
<div class="line"><a name="l00209"></a><span class="lineno"> 209</span>  fprintf(stderr, <span class="stringliteral">"Error encoding audio frame\n"</span>);</div>
<div class="line"><a name="l00210"></a><span class="lineno"> 210</span>  exit(1);</div>
<div class="line"><a name="l00211"></a><span class="lineno"> 211</span>  }</div>
<div class="line"><a name="l00212"></a><span class="lineno"> 212</span>  <span class="keywordflow">if</span> (got_output) {</div>
<div class="line"><a name="l00213"></a><span class="lineno"> 213</span>  fwrite(pkt.<a class="code" href="structAVPacket.html#aaf4fe58dfcc7c232c1f2268b539d8367">data</a>, 1, pkt.<a class="code" href="structAVPacket.html#a4d1ea19f63eb107111fd650ca514d1f4">size</a>, f);</div>
<div class="line"><a name="l00214"></a><span class="lineno"> 214</span>  <a class="code" href="group__lavc__packet.html#ga63d5a489b419bd5d45cfd09091cbcbc2">av_packet_unref</a>(&pkt);</div>
<div class="line"><a name="l00215"></a><span class="lineno"> 215</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"> 217</span> </div>
<div class="line"><a name="l00218"></a><span class="lineno"> 218</span>  <span class="comment">/* get the delayed frames */</span></div>
<div class="line"><a name="l00219"></a><span class="lineno"> 219</span>  <span class="keywordflow">for</span> (got_output = 1; got_output; i++) {</div>
<div class="line"><a name="l00220"></a><span class="lineno"> 220</span>  ret = <a class="code" href="group__lavc__encoding.html#ga93a49fbd0973b216dcb8a8c5dffe1d82">avcodec_encode_audio2</a>(c, &pkt, NULL, &got_output);</div>
<div class="line"><a name="l00221"></a><span class="lineno"> 221</span>  <span class="keywordflow">if</span> (ret < 0) {</div>
<div class="line"><a name="l00222"></a><span class="lineno"> 222</span>  fprintf(stderr, <span class="stringliteral">"Error encoding frame\n"</span>);</div>
<div class="line"><a name="l00223"></a><span class="lineno"> 223</span>  exit(1);</div>
<div class="line"><a name="l00224"></a><span class="lineno"> 224</span>  }</div>
<div class="line"><a name="l00225"></a><span class="lineno"> 225</span> </div>
<div class="line"><a name="l00226"></a><span class="lineno"> 226</span>  <span class="keywordflow">if</span> (got_output) {</div>
<div class="line"><a name="l00227"></a><span class="lineno"> 227</span>  fwrite(pkt.<a class="code" href="structAVPacket.html#aaf4fe58dfcc7c232c1f2268b539d8367">data</a>, 1, pkt.<a class="code" href="structAVPacket.html#a4d1ea19f63eb107111fd650ca514d1f4">size</a>, f);</div>
<div class="line"><a name="l00228"></a><span class="lineno"> 228</span>  <a class="code" href="group__lavc__packet.html#ga63d5a489b419bd5d45cfd09091cbcbc2">av_packet_unref</a>(&pkt);</div>
<div class="line"><a name="l00229"></a><span class="lineno"> 229</span>  }</div>
<div class="line"><a name="l00230"></a><span class="lineno"> 230</span>  }</div>
<div class="line"><a name="l00231"></a><span class="lineno"> 231</span>  fclose(f);</div>
<div class="line"><a name="l00232"></a><span class="lineno"> 232</span> </div>
<div class="line"><a name="l00233"></a><span class="lineno"> 233</span>  <a class="code" href="group__lavu__mem.html#ga0cc84043ea2167ad005c86e11d0bcdba">av_freep</a>(&samples);</div>
<div class="line"><a name="l00234"></a><span class="lineno"> 234</span>  <a class="code" href="group__lavu__frame.html#ga979d73f3228814aee56aeca0636e37cc">av_frame_free</a>(&frame);</div>
<div class="line"><a name="l00235"></a><span class="lineno"> 235</span>  <a class="code" href="group__lavc__core.html#gaf4daa92361efb3523ef5afeb0b54077f">avcodec_close</a>(c);</div>
<div class="line"><a name="l00236"></a><span class="lineno"> 236</span>  <a class="code" href="group__lavu__mem.html#ga0c9096f498624c525aa2315b8a20c411">av_free</a>(c);</div>
<div class="line"><a name="l00237"></a><span class="lineno"> 237</span> }</div>
<div class="line"><a name="l00238"></a><span class="lineno"> 238</span> </div>
<div class="line"><a name="l00239"></a><span class="lineno"> 239</span> <span class="comment">/*</span></div>
<div class="line"><a name="l00240"></a><span class="lineno"> 240</span> <span class="comment"> * Audio decoding.</span></div>
<div class="line"><a name="l00241"></a><span class="lineno"> 241</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00242"></a><span class="lineno"><a class="line" href="decoding__encoding_8c.html#a5cbf8bd3441619622d3956d623d944b3"> 242</a></span> <span class="keyword">static</span> <span class="keywordtype">void</span> <a class="code" href="decoding__encoding_8c.html#a5cbf8bd3441619622d3956d623d944b3">audio_decode_example</a>(<span class="keyword">const</span> <span class="keywordtype">char</span> *outfilename, <span class="keyword">const</span> <span class="keywordtype">char</span> *filename)</div>
<div class="line"><a name="l00243"></a><span class="lineno"> 243</span> {</div>
<div class="line"><a name="l00244"></a><span class="lineno"> 244</span>  <a class="code" href="structAVCodec.html">AVCodec</a> *codec;</div>
<div class="line"><a name="l00245"></a><span class="lineno"> 245</span>  <a class="code" href="structAVCodecContext.html">AVCodecContext</a> *c= NULL;</div>
<div class="line"><a name="l00246"></a><span class="lineno"> 246</span>  <span class="keywordtype">int</span> len;</div>
<div class="line"><a name="l00247"></a><span class="lineno"> 247</span>  FILE *f, *outfile;</div>
<div class="line"><a name="l00248"></a><span class="lineno"> 248</span>  uint8_t inbuf[<a class="code" href="decoding__encoding_8c.html#a3a513b5612784dd20c0dfbdf456abd01">AUDIO_INBUF_SIZE</a> + <a class="code" href="group__lavc__decoding.html#ga8f5b632a03ce83ac8e025894b1fc307a">AV_INPUT_BUFFER_PADDING_SIZE</a>];</div>
<div class="line"><a name="l00249"></a><span class="lineno"> 249</span>  <a class="code" href="structAVPacket.html">AVPacket</a> avpkt;</div>
<div class="line"><a name="l00250"></a><span class="lineno"> 250</span>  <a class="code" href="structAVFrame.html">AVFrame</a> *decoded_frame = NULL;</div>
<div class="line"><a name="l00251"></a><span class="lineno"> 251</span> </div>
<div class="line"><a name="l00252"></a><span class="lineno"> 252</span>  <a class="code" href="group__lavc__packet.html#gac9cb9756175b96e7441575803757fb73">av_init_packet</a>(&avpkt);</div>
<div class="line"><a name="l00253"></a><span class="lineno"> 253</span> </div>
<div class="line"><a name="l00254"></a><span class="lineno"> 254</span>  printf(<span class="stringliteral">"Decode audio file %s to %s\n"</span>, filename, outfilename);</div>
<div class="line"><a name="l00255"></a><span class="lineno"> 255</span> </div>
<div class="line"><a name="l00256"></a><span class="lineno"> 256</span>  <span class="comment">/* find the mpeg audio decoder */</span></div>
<div class="line"><a name="l00257"></a><span class="lineno"> 257</span>  codec = <a class="code" href="group__lavc__decoding.html#ga19a0ca553277f019dd5b0fec6e1f9dca">avcodec_find_decoder</a>(<a class="code" href="group__lavc__core.html#ggaadca229ad2c20e060a14fec08a5cc7cea90ffce5aedda33269b22221916cd8487">AV_CODEC_ID_MP2</a>);</div>
<div class="line"><a name="l00258"></a><span class="lineno"> 258</span>  <span class="keywordflow">if</span> (!codec) {</div>
<div class="line"><a name="l00259"></a><span class="lineno"> 259</span>  fprintf(stderr, <span class="stringliteral">"Codec not found\n"</span>);</div>
<div class="line"><a name="l00260"></a><span class="lineno"> 260</span>  exit(1);</div>
<div class="line"><a name="l00261"></a><span class="lineno"> 261</span>  }</div>
<div class="line"><a name="l00262"></a><span class="lineno"> 262</span> </div>
<div class="line"><a name="l00263"></a><span class="lineno"> 263</span>  c = <a class="code" href="group__lavc__core.html#gae80afec6f26df6607eaacf39b561c315">avcodec_alloc_context3</a>(codec);</div>
<div class="line"><a name="l00264"></a><span class="lineno"> 264</span>  <span class="keywordflow">if</span> (!c) {</div>
<div class="line"><a name="l00265"></a><span class="lineno"> 265</span>  fprintf(stderr, <span class="stringliteral">"Could not allocate audio codec context\n"</span>);</div>
<div class="line"><a name="l00266"></a><span class="lineno"> 266</span>  exit(1);</div>
<div class="line"><a name="l00267"></a><span class="lineno"> 267</span>  }</div>
<div class="line"><a name="l00268"></a><span class="lineno"> 268</span> </div>
<div class="line"><a name="l00269"></a><span class="lineno"> 269</span>  <span class="comment">/* open it */</span></div>
<div class="line"><a name="l00270"></a><span class="lineno"> 270</span>  <span class="keywordflow">if</span> (<a class="code" href="group__lavc__core.html#ga11f785a188d7d9df71621001465b0f1d">avcodec_open2</a>(c, codec, NULL) < 0) {</div>
<div class="line"><a name="l00271"></a><span class="lineno"> 271</span>  fprintf(stderr, <span class="stringliteral">"Could not open codec\n"</span>);</div>
<div class="line"><a name="l00272"></a><span class="lineno"> 272</span>  exit(1);</div>
<div class="line"><a name="l00273"></a><span class="lineno"> 273</span>  }</div>
<div class="line"><a name="l00274"></a><span class="lineno"> 274</span> </div>
<div class="line"><a name="l00275"></a><span class="lineno"> 275</span>  f = fopen(filename, <span class="stringliteral">"rb"</span>);</div>
<div class="line"><a name="l00276"></a><span class="lineno"> 276</span>  <span class="keywordflow">if</span> (!f) {</div>
<div class="line"><a name="l00277"></a><span class="lineno"> 277</span>  fprintf(stderr, <span class="stringliteral">"Could not open %s\n"</span>, filename);</div>
<div class="line"><a name="l00278"></a><span class="lineno"> 278</span>  exit(1);</div>
<div class="line"><a name="l00279"></a><span class="lineno"> 279</span>  }</div>
<div class="line"><a name="l00280"></a><span class="lineno"> 280</span>  outfile = fopen(outfilename, <span class="stringliteral">"wb"</span>);</div>
<div class="line"><a name="l00281"></a><span class="lineno"> 281</span>  <span class="keywordflow">if</span> (!outfile) {</div>
<div class="line"><a name="l00282"></a><span class="lineno"> 282</span>  <a class="code" href="group__lavu__mem.html#ga0c9096f498624c525aa2315b8a20c411">av_free</a>(c);</div>
<div class="line"><a name="l00283"></a><span class="lineno"> 283</span>  exit(1);</div>
<div class="line"><a name="l00284"></a><span class="lineno"> 284</span>  }</div>
<div class="line"><a name="l00285"></a><span class="lineno"> 285</span> </div>
<div class="line"><a name="l00286"></a><span class="lineno"> 286</span>  <span class="comment">/* decode until eof */</span></div>
<div class="line"><a name="l00287"></a><span class="lineno"> 287</span>  avpkt.<a class="code" href="structAVPacket.html#aaf4fe58dfcc7c232c1f2268b539d8367">data</a> = inbuf;</div>
<div class="line"><a name="l00288"></a><span class="lineno"> 288</span>  avpkt.<a class="code" href="structAVPacket.html#a4d1ea19f63eb107111fd650ca514d1f4">size</a> = fread(inbuf, 1, <a class="code" href="decoding__encoding_8c.html#a3a513b5612784dd20c0dfbdf456abd01">AUDIO_INBUF_SIZE</a>, f);</div>
<div class="line"><a name="l00289"></a><span class="lineno"> 289</span> </div>
<div class="line"><a name="l00290"></a><span class="lineno"> 290</span>  <span class="keywordflow">while</span> (avpkt.<a class="code" href="structAVPacket.html#a4d1ea19f63eb107111fd650ca514d1f4">size</a> > 0) {</div>
<div class="line"><a name="l00291"></a><span class="lineno"> 291</span>  <span class="keywordtype">int</span> i, ch;</div>
<div class="line"><a name="l00292"></a><span class="lineno"> 292</span>  <span class="keywordtype">int</span> got_frame = 0;</div>
<div class="line"><a name="l00293"></a><span class="lineno"> 293</span> </div>
<div class="line"><a name="l00294"></a><span class="lineno"> 294</span>  <span class="keywordflow">if</span> (!decoded_frame) {</div>
<div class="line"><a name="l00295"></a><span class="lineno"> 295</span>  <span class="keywordflow">if</span> (!(decoded_frame = <a class="code" href="group__lavu__frame.html#gac700017c5270c79c1e1befdeeb008b2f">av_frame_alloc</a>())) {</div>
<div class="line"><a name="l00296"></a><span class="lineno"> 296</span>  fprintf(stderr, <span class="stringliteral">"Could not allocate audio frame\n"</span>);</div>
<div class="line"><a name="l00297"></a><span class="lineno"> 297</span>  exit(1);</div>
<div class="line"><a name="l00298"></a><span class="lineno"> 298</span>  }</div>
<div class="line"><a name="l00299"></a><span class="lineno"> 299</span>  }</div>
<div class="line"><a name="l00300"></a><span class="lineno"> 300</span> </div>
<div class="line"><a name="l00301"></a><span class="lineno"> 301</span>  len = <a class="code" href="group__lavc__decoding.html#ga834bb1b062fbcc2de4cf7fb93f154a3e">avcodec_decode_audio4</a>(c, decoded_frame, &got_frame, &avpkt);</div>
<div class="line"><a name="l00302"></a><span class="lineno"> 302</span>  <span class="keywordflow">if</span> (len < 0) {</div>
<div class="line"><a name="l00303"></a><span class="lineno"> 303</span>  fprintf(stderr, <span class="stringliteral">"Error while decoding\n"</span>);</div>
<div class="line"><a name="l00304"></a><span class="lineno"> 304</span>  exit(1);</div>
<div class="line"><a name="l00305"></a><span class="lineno"> 305</span>  }</div>
<div class="line"><a name="l00306"></a><span class="lineno"> 306</span>  <span class="keywordflow">if</span> (got_frame) {</div>
<div class="line"><a name="l00307"></a><span class="lineno"> 307</span>  <span class="comment">/* if a frame has been decoded, output it */</span></div>
<div class="line"><a name="l00308"></a><span class="lineno"> 308</span>  <span class="keywordtype">int</span> data_size = <a class="code" href="group__lavu__sampfmts.html#ga0c3c218e1dd570ad4917c69a35a6c77d">av_get_bytes_per_sample</a>(c-><a class="code" href="structAVCodecContext.html#a1bdba69ea111e2a9d03fdaa7a46a4c45">sample_fmt</a>);</div>
<div class="line"><a name="l00309"></a><span class="lineno"> 309</span>  <span class="keywordflow">if</span> (data_size < 0) {</div>
<div class="line"><a name="l00310"></a><span class="lineno"> 310</span>  <span class="comment">/* This should not occur, checking just for paranoia */</span></div>
<div class="line"><a name="l00311"></a><span class="lineno"> 311</span>  fprintf(stderr, <span class="stringliteral">"Failed to calculate data size\n"</span>);</div>
<div class="line"><a name="l00312"></a><span class="lineno"> 312</span>  exit(1);</div>
<div class="line"><a name="l00313"></a><span class="lineno"> 313</span>  }</div>
<div class="line"><a name="l00314"></a><span class="lineno"> 314</span>  <span class="keywordflow">for</span> (i=0; i<decoded_frame-><a class="code" href="structAVFrame.html#a02f45ab8191aea1660159f1e464237ea">nb_samples</a>; i++)</div>
<div class="line"><a name="l00315"></a><span class="lineno"> 315</span>  <span class="keywordflow">for</span> (ch=0; ch<c-><a class="code" href="structAVCodecContext.html#ac1e6c2cd1269caa7570575725c682a49">channels</a>; ch++)</div>
<div class="line"><a name="l00316"></a><span class="lineno"> 316</span>  fwrite(decoded_frame-><a class="code" href="structAVFrame.html#a1d0f65014a8d1bf78cec8cbed2304992">data</a>[ch] + data_size*i, 1, data_size, outfile);</div>
<div class="line"><a name="l00317"></a><span class="lineno"> 317</span>  }</div>
<div class="line"><a name="l00318"></a><span class="lineno"> 318</span>  avpkt.<a class="code" href="structAVPacket.html#a4d1ea19f63eb107111fd650ca514d1f4">size</a> -= len;</div>
<div class="line"><a name="l00319"></a><span class="lineno"> 319</span>  avpkt.<a class="code" href="structAVPacket.html#aaf4fe58dfcc7c232c1f2268b539d8367">data</a> += len;</div>
<div class="line"><a name="l00320"></a><span class="lineno"> 320</span>  avpkt.<a class="code" href="structAVPacket.html#a85dbbd306b44b02390cd91c45e6a0f76">dts</a> =</div>
<div class="line"><a name="l00321"></a><span class="lineno"> 321</span>  avpkt.<a class="code" href="structAVPacket.html#a73bde0a37f3b1efc839f11295bfbf42a">pts</a> = <a class="code" href="group__lavu__time.html#ga2eaefe702f95f619ea6f2d08afa01be1">AV_NOPTS_VALUE</a>;</div>
<div class="line"><a name="l00322"></a><span class="lineno"> 322</span>  <span class="keywordflow">if</span> (avpkt.<a class="code" href="structAVPacket.html#a4d1ea19f63eb107111fd650ca514d1f4">size</a> < <a class="code" href="decoding__encoding_8c.html#aebbadad5d16117f57006e8358ebf1ccc">AUDIO_REFILL_THRESH</a>) {</div>
<div class="line"><a name="l00323"></a><span class="lineno"> 323</span>  <span class="comment">/* Refill the input buffer, to avoid trying to decode</span></div>
<div class="line"><a name="l00324"></a><span class="lineno"> 324</span> <span class="comment"> * incomplete frames. Instead of this, one could also use</span></div>
<div class="line"><a name="l00325"></a><span class="lineno"> 325</span> <span class="comment"> * a parser, or use a proper container format through</span></div>
<div class="line"><a name="l00326"></a><span class="lineno"> 326</span> <span class="comment"> * libavformat. */</span></div>
<div class="line"><a name="l00327"></a><span class="lineno"> 327</span>  memmove(inbuf, avpkt.<a class="code" href="structAVPacket.html#aaf4fe58dfcc7c232c1f2268b539d8367">data</a>, avpkt.<a class="code" href="structAVPacket.html#a4d1ea19f63eb107111fd650ca514d1f4">size</a>);</div>
<div class="line"><a name="l00328"></a><span class="lineno"> 328</span>  avpkt.<a class="code" href="structAVPacket.html#aaf4fe58dfcc7c232c1f2268b539d8367">data</a> = inbuf;</div>
<div class="line"><a name="l00329"></a><span class="lineno"> 329</span>  len = fread(avpkt.<a class="code" href="structAVPacket.html#aaf4fe58dfcc7c232c1f2268b539d8367">data</a> + avpkt.<a class="code" href="structAVPacket.html#a4d1ea19f63eb107111fd650ca514d1f4">size</a>, 1,</div>
<div class="line"><a name="l00330"></a><span class="lineno"> 330</span>  <a class="code" href="decoding__encoding_8c.html#a3a513b5612784dd20c0dfbdf456abd01">AUDIO_INBUF_SIZE</a> - avpkt.<a class="code" href="structAVPacket.html#a4d1ea19f63eb107111fd650ca514d1f4">size</a>, f);</div>
<div class="line"><a name="l00331"></a><span class="lineno"> 331</span>  <span class="keywordflow">if</span> (len > 0)</div>
<div class="line"><a name="l00332"></a><span class="lineno"> 332</span>  avpkt.<a class="code" href="structAVPacket.html#a4d1ea19f63eb107111fd650ca514d1f4">size</a> += len;</div>
<div class="line"><a name="l00333"></a><span class="lineno"> 333</span>  }</div>
<div class="line"><a name="l00334"></a><span class="lineno"> 334</span>  }</div>
<div class="line"><a name="l00335"></a><span class="lineno"> 335</span> </div>
<div class="line"><a name="l00336"></a><span class="lineno"> 336</span>  fclose(outfile);</div>
<div class="line"><a name="l00337"></a><span class="lineno"> 337</span>  fclose(f);</div>
<div class="line"><a name="l00338"></a><span class="lineno"> 338</span> </div>
<div class="line"><a name="l00339"></a><span class="lineno"> 339</span>  <a class="code" href="group__lavc__core.html#gaf4daa92361efb3523ef5afeb0b54077f">avcodec_close</a>(c);</div>
<div class="line"><a name="l00340"></a><span class="lineno"> 340</span>  <a class="code" href="group__lavu__mem.html#ga0c9096f498624c525aa2315b8a20c411">av_free</a>(c);</div>
<div class="line"><a name="l00341"></a><span class="lineno"> 341</span>  <a class="code" href="group__lavu__frame.html#ga979d73f3228814aee56aeca0636e37cc">av_frame_free</a>(&decoded_frame);</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> </div>
<div class="line"><a name="l00344"></a><span class="lineno"> 344</span> <span class="comment">/*</span></div>
<div class="line"><a name="l00345"></a><span class="lineno"> 345</span> <span class="comment"> * Video encoding example</span></div>
<div class="line"><a name="l00346"></a><span class="lineno"> 346</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00347"></a><span class="lineno"><a class="line" href="decoding__encoding_8c.html#a7293f14f6e6315d54331137ae883079f"> 347</a></span> <span class="keyword">static</span> <span class="keywordtype">void</span> <a class="code" href="decoding__encoding_8c.html#a7293f14f6e6315d54331137ae883079f">video_encode_example</a>(<span class="keyword">const</span> <span class="keywordtype">char</span> *filename, <span class="keywordtype">int</span> codec_id)</div>
<div class="line"><a name="l00348"></a><span class="lineno"> 348</span> {</div>
<div class="line"><a name="l00349"></a><span class="lineno"> 349</span>  <a class="code" href="structAVCodec.html">AVCodec</a> *codec;</div>
<div class="line"><a name="l00350"></a><span class="lineno"> 350</span>  <a class="code" href="structAVCodecContext.html">AVCodecContext</a> *c= NULL;</div>
<div class="line"><a name="l00351"></a><span class="lineno"> 351</span>  <span class="keywordtype">int</span> i, ret, x, y, got_output;</div>
<div class="line"><a name="l00352"></a><span class="lineno"> 352</span>  FILE *f;</div>
<div class="line"><a name="l00353"></a><span class="lineno"> 353</span>  <a class="code" href="structAVFrame.html">AVFrame</a> *<a class="code" href="demuxing__decoding_8c.html#ad7d33d579a8d4241a5e643e39287a209">frame</a>;</div>
<div class="line"><a name="l00354"></a><span class="lineno"> 354</span>  <a class="code" href="structAVPacket.html">AVPacket</a> <a class="code" href="demuxing__decoding_8c.html#a3d4c6562f0b27cf0cacbbea5c038c090">pkt</a>;</div>
<div class="line"><a name="l00355"></a><span class="lineno"> 355</span>  uint8_t endcode[] = { 0, 0, 1, 0xb7 };</div>
<div class="line"><a name="l00356"></a><span class="lineno"> 356</span> </div>
<div class="line"><a name="l00357"></a><span class="lineno"> 357</span>  printf(<span class="stringliteral">"Encode video file %s\n"</span>, filename);</div>
<div class="line"><a name="l00358"></a><span class="lineno"> 358</span> </div>
<div class="line"><a name="l00359"></a><span class="lineno"> 359</span>  <span class="comment">/* find the mpeg1 video encoder */</span></div>
<div class="line"><a name="l00360"></a><span class="lineno"> 360</span>  codec = <a class="code" href="group__lavc__encoding.html#ga9f820c481615c3a02d0407bac0bdbf25">avcodec_find_encoder</a>(codec_id);</div>
<div class="line"><a name="l00361"></a><span class="lineno"> 361</span>  <span class="keywordflow">if</span> (!codec) {</div>
<div class="line"><a name="l00362"></a><span class="lineno"> 362</span>  fprintf(stderr, <span class="stringliteral">"Codec not found\n"</span>);</div>
<div class="line"><a name="l00363"></a><span class="lineno"> 363</span>  exit(1);</div>
<div class="line"><a name="l00364"></a><span class="lineno"> 364</span>  }</div>
<div class="line"><a name="l00365"></a><span class="lineno"> 365</span> </div>
<div class="line"><a name="l00366"></a><span class="lineno"> 366</span>  c = <a class="code" href="group__lavc__core.html#gae80afec6f26df6607eaacf39b561c315">avcodec_alloc_context3</a>(codec);</div>
<div class="line"><a name="l00367"></a><span class="lineno"> 367</span>  <span class="keywordflow">if</span> (!c) {</div>
<div class="line"><a name="l00368"></a><span class="lineno"> 368</span>  fprintf(stderr, <span class="stringliteral">"Could not allocate video codec context\n"</span>);</div>
<div class="line"><a name="l00369"></a><span class="lineno"> 369</span>  exit(1);</div>
<div class="line"><a name="l00370"></a><span class="lineno"> 370</span>  }</div>
<div class="line"><a name="l00371"></a><span class="lineno"> 371</span> </div>
<div class="line"><a name="l00372"></a><span class="lineno"> 372</span>  <span class="comment">/* put sample parameters */</span></div>
<div class="line"><a name="l00373"></a><span class="lineno"> 373</span>  c-><a class="code" href="structAVCodecContext.html#a6b53fda85ad61baa345edbd96cb8a33c">bit_rate</a> = 400000;</div>
<div class="line"><a name="l00374"></a><span class="lineno"> 374</span>  <span class="comment">/* resolution must be a multiple of two */</span></div>
<div class="line"><a name="l00375"></a><span class="lineno"> 375</span>  c-><a class="code" href="structAVCodecContext.html#a0d8f46461754e8abea0847dcbc41b956">width</a> = 352;</div>
<div class="line"><a name="l00376"></a><span class="lineno"> 376</span>  c-><a class="code" href="structAVCodecContext.html#a0449afd803eb107bd4dbc8b5ea22e363">height</a> = 288;</div>
<div class="line"><a name="l00377"></a><span class="lineno"> 377</span>  <span class="comment">/* frames per second */</span></div>
<div class="line"><a name="l00378"></a><span class="lineno"> 378</span>  c-><a class="code" href="structAVCodecContext.html#ab7bfeb9fa5840aac090e2b0bd0ef7589">time_base</a> = (<a class="code" href="structAVRational.html">AVRational</a>){1,25};</div>
<div class="line"><a name="l00379"></a><span class="lineno"> 379</span>  <span class="comment">/* emit one intra frame every ten frames</span></div>
<div class="line"><a name="l00380"></a><span class="lineno"> 380</span> <span class="comment"> * check frame pict_type before passing frame</span></div>
<div class="line"><a name="l00381"></a><span class="lineno"> 381</span> <span class="comment"> * to encoder, if frame->pict_type is AV_PICTURE_TYPE_I</span></div>
<div class="line"><a name="l00382"></a><span class="lineno"> 382</span> <span class="comment"> * then gop_size is ignored and the output of encoder</span></div>
<div class="line"><a name="l00383"></a><span class="lineno"> 383</span> <span class="comment"> * will always be I frame irrespective to gop_size</span></div>
<div class="line"><a name="l00384"></a><span class="lineno"> 384</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00385"></a><span class="lineno"> 385</span>  c-><a class="code" href="structAVCodecContext.html#a9b6b3f1fcbdcc2ad9f4dbb4370496e38">gop_size</a> = 10;</div>
<div class="line"><a name="l00386"></a><span class="lineno"> 386</span>  c-><a class="code" href="structAVCodecContext.html#a3e5334a611a3e2a6a653805bb9e2d4d4">max_b_frames</a> = 1;</div>
<div class="line"><a name="l00387"></a><span class="lineno"> 387</span>  c-><a class="code" href="structAVCodecContext.html#a0425c77b3d06d71e5db88b1d7e1b37f2">pix_fmt</a> = <a class="code" href="pixfmt_8h.html#a9a8e335cf3be472042bc9f0cf80cd4c5a1aa7677092740d8def31655b5d7f0cc2">AV_PIX_FMT_YUV420P</a>;</div>
<div class="line"><a name="l00388"></a><span class="lineno"> 388</span> </div>
<div class="line"><a name="l00389"></a><span class="lineno"> 389</span>  <span class="keywordflow">if</span> (codec_id == <a class="code" href="group__lavc__core.html#ggaadca229ad2c20e060a14fec08a5cc7cea3d4c051c8b18a3c18750676a308c10be">AV_CODEC_ID_H264</a>)</div>
<div class="line"><a name="l00390"></a><span class="lineno"> 390</span>  <a class="code" href="group__opt__set__funcs.html#ga5fd4b92bdf4f392a2847f711676a7537">av_opt_set</a>(c-><a class="code" href="structAVCodecContext.html#af3379123060ad8cc9c321c29af4f8360">priv_data</a>, <span class="stringliteral">"preset"</span>, <span class="stringliteral">"slow"</span>, 0);</div>
<div class="line"><a name="l00391"></a><span class="lineno"> 391</span> </div>
<div class="line"><a name="l00392"></a><span class="lineno"> 392</span>  <span class="comment">/* open it */</span></div>
<div class="line"><a name="l00393"></a><span class="lineno"> 393</span>  <span class="keywordflow">if</span> (<a class="code" href="group__lavc__core.html#ga11f785a188d7d9df71621001465b0f1d">avcodec_open2</a>(c, codec, NULL) < 0) {</div>
<div class="line"><a name="l00394"></a><span class="lineno"> 394</span>  fprintf(stderr, <span class="stringliteral">"Could not open codec\n"</span>);</div>
<div class="line"><a name="l00395"></a><span class="lineno"> 395</span>  exit(1);</div>
<div class="line"><a name="l00396"></a><span class="lineno"> 396</span>  }</div>
<div class="line"><a name="l00397"></a><span class="lineno"> 397</span> </div>
<div class="line"><a name="l00398"></a><span class="lineno"> 398</span>  f = fopen(filename, <span class="stringliteral">"wb"</span>);</div>
<div class="line"><a name="l00399"></a><span class="lineno"> 399</span>  <span class="keywordflow">if</span> (!f) {</div>
<div class="line"><a name="l00400"></a><span class="lineno"> 400</span>  fprintf(stderr, <span class="stringliteral">"Could not open %s\n"</span>, filename);</div>
<div class="line"><a name="l00401"></a><span class="lineno"> 401</span>  exit(1);</div>
<div class="line"><a name="l00402"></a><span class="lineno"> 402</span>  }</div>
<div class="line"><a name="l00403"></a><span class="lineno"> 403</span> </div>
<div class="line"><a name="l00404"></a><span class="lineno"> 404</span>  frame = <a class="code" href="group__lavu__frame.html#gac700017c5270c79c1e1befdeeb008b2f">av_frame_alloc</a>();</div>
<div class="line"><a name="l00405"></a><span class="lineno"> 405</span>  <span class="keywordflow">if</span> (!frame) {</div>
<div class="line"><a name="l00406"></a><span class="lineno"> 406</span>  fprintf(stderr, <span class="stringliteral">"Could not allocate video frame\n"</span>);</div>
<div class="line"><a name="l00407"></a><span class="lineno"> 407</span>  exit(1);</div>
<div class="line"><a name="l00408"></a><span class="lineno"> 408</span>  }</div>
<div class="line"><a name="l00409"></a><span class="lineno"> 409</span>  frame-><a class="code" href="structAVFrame.html#aed14fa772ce46881020fd1545c86432c">format</a> = c-><a class="code" href="structAVCodecContext.html#a0425c77b3d06d71e5db88b1d7e1b37f2">pix_fmt</a>;</div>
<div class="line"><a name="l00410"></a><span class="lineno"> 410</span>  frame-><a class="code" href="structAVFrame.html#a1e71ce60cedd5f3b6811714a9f7f9e0a">width</a> = c-><a class="code" href="structAVCodecContext.html#a0d8f46461754e8abea0847dcbc41b956">width</a>;</div>
<div class="line"><a name="l00411"></a><span class="lineno"> 411</span>  frame-><a class="code" href="structAVFrame.html#a3f89733f429c98ba5bc64373fb0a3f13">height</a> = c-><a class="code" href="structAVCodecContext.html#a0449afd803eb107bd4dbc8b5ea22e363">height</a>;</div>
<div class="line"><a name="l00412"></a><span class="lineno"> 412</span> </div>
<div class="line"><a name="l00413"></a><span class="lineno"> 413</span>  <span class="comment">/* the image can be allocated by any means and av_image_alloc() is</span></div>
<div class="line"><a name="l00414"></a><span class="lineno"> 414</span> <span class="comment"> * just the most convenient way if av_malloc() is to be used */</span></div>
<div class="line"><a name="l00415"></a><span class="lineno"> 415</span>  ret = <a class="code" href="group__lavu__picture.html#ga841e0a89a642e24141af1918a2c10448">av_image_alloc</a>(frame-><a class="code" href="structAVFrame.html#a1d0f65014a8d1bf78cec8cbed2304992">data</a>, frame-><a class="code" href="structAVFrame.html#aa52bfc6605f6a3059a0c3226cc0f6567">linesize</a>, c-><a class="code" href="structAVCodecContext.html#a0d8f46461754e8abea0847dcbc41b956">width</a>, c-><a class="code" href="structAVCodecContext.html#a0449afd803eb107bd4dbc8b5ea22e363">height</a>,</div>
<div class="line"><a name="l00416"></a><span class="lineno"> 416</span>  c-><a class="code" href="structAVCodecContext.html#a0425c77b3d06d71e5db88b1d7e1b37f2">pix_fmt</a>, 32);</div>
<div class="line"><a name="l00417"></a><span class="lineno"> 417</span>  <span class="keywordflow">if</span> (ret < 0) {</div>
<div class="line"><a name="l00418"></a><span class="lineno"> 418</span>  fprintf(stderr, <span class="stringliteral">"Could not allocate raw picture buffer\n"</span>);</div>
<div class="line"><a name="l00419"></a><span class="lineno"> 419</span>  exit(1);</div>
<div class="line"><a name="l00420"></a><span class="lineno"> 420</span>  }</div>
<div class="line"><a name="l00421"></a><span class="lineno"> 421</span> </div>
<div class="line"><a name="l00422"></a><span class="lineno"> 422</span>  <span class="comment">/* encode 1 second of video */</span></div>
<div class="line"><a name="l00423"></a><span class="lineno"> 423</span>  <span class="keywordflow">for</span> (i = 0; i < 25; i++) {</div>
<div class="line"><a name="l00424"></a><span class="lineno"> 424</span>  <a class="code" href="group__lavc__packet.html#gac9cb9756175b96e7441575803757fb73">av_init_packet</a>(&pkt);</div>
<div class="line"><a name="l00425"></a><span class="lineno"> 425</span>  pkt.<a class="code" href="structAVPacket.html#aaf4fe58dfcc7c232c1f2268b539d8367">data</a> = NULL; <span class="comment">// packet data will be allocated by the encoder</span></div>
<div class="line"><a name="l00426"></a><span class="lineno"> 426</span>  pkt.<a class="code" href="structAVPacket.html#a4d1ea19f63eb107111fd650ca514d1f4">size</a> = 0;</div>
<div class="line"><a name="l00427"></a><span class="lineno"> 427</span> </div>
<div class="line"><a name="l00428"></a><span class="lineno"> 428</span>  fflush(stdout);</div>
<div class="line"><a name="l00429"></a><span class="lineno"> 429</span>  <span class="comment">/* prepare a dummy image */</span></div>
<div class="line"><a name="l00430"></a><span class="lineno"> 430</span>  <span class="comment">/* Y */</span></div>
<div class="line"><a name="l00431"></a><span class="lineno"> 431</span>  <span class="keywordflow">for</span> (y = 0; y < c-><a class="code" href="structAVCodecContext.html#a0449afd803eb107bd4dbc8b5ea22e363">height</a>; y++) {</div>
<div class="line"><a name="l00432"></a><span class="lineno"> 432</span>  <span class="keywordflow">for</span> (x = 0; x < c-><a class="code" href="structAVCodecContext.html#a0d8f46461754e8abea0847dcbc41b956">width</a>; x++) {</div>
<div class="line"><a name="l00433"></a><span class="lineno"> 433</span>  frame-><a class="code" href="structAVFrame.html#a1d0f65014a8d1bf78cec8cbed2304992">data</a>[0][y * frame-><a class="code" href="structAVFrame.html#aa52bfc6605f6a3059a0c3226cc0f6567">linesize</a>[0] + x] = x + y + i * 3;</div>
<div class="line"><a name="l00434"></a><span class="lineno"> 434</span>  }</div>
<div class="line"><a name="l00435"></a><span class="lineno"> 435</span>  }</div>
<div class="line"><a name="l00436"></a><span class="lineno"> 436</span> </div>
<div class="line"><a name="l00437"></a><span class="lineno"> 437</span>  <span class="comment">/* Cb and Cr */</span></div>
<div class="line"><a name="l00438"></a><span class="lineno"> 438</span>  <span class="keywordflow">for</span> (y = 0; y < c-><a class="code" href="structAVCodecContext.html#a0449afd803eb107bd4dbc8b5ea22e363">height</a>/2; y++) {</div>
<div class="line"><a name="l00439"></a><span class="lineno"> 439</span>  <span class="keywordflow">for</span> (x = 0; x < c-><a class="code" href="structAVCodecContext.html#a0d8f46461754e8abea0847dcbc41b956">width</a>/2; x++) {</div>
<div class="line"><a name="l00440"></a><span class="lineno"> 440</span>  frame-><a class="code" href="structAVFrame.html#a1d0f65014a8d1bf78cec8cbed2304992">data</a>[1][y * frame-><a class="code" href="structAVFrame.html#aa52bfc6605f6a3059a0c3226cc0f6567">linesize</a>[1] + x] = 128 + y + i * 2;</div>
<div class="line"><a name="l00441"></a><span class="lineno"> 441</span>  frame-><a class="code" href="structAVFrame.html#a1d0f65014a8d1bf78cec8cbed2304992">data</a>[2][y * frame-><a class="code" href="structAVFrame.html#aa52bfc6605f6a3059a0c3226cc0f6567">linesize</a>[2] + x] = 64 + x + i * 5;</div>
<div class="line"><a name="l00442"></a><span class="lineno"> 442</span>  }</div>
<div class="line"><a name="l00443"></a><span class="lineno"> 443</span>  }</div>
<div class="line"><a name="l00444"></a><span class="lineno"> 444</span> </div>
<div class="line"><a name="l00445"></a><span class="lineno"> 445</span>  frame-><a class="code" href="structAVFrame.html#a0452833e3ab6ddd7acbf82817a7818a4">pts</a> = i;</div>
<div class="line"><a name="l00446"></a><span class="lineno"> 446</span> </div>
<div class="line"><a name="l00447"></a><span class="lineno"> 447</span>  <span class="comment">/* encode the image */</span></div>
<div class="line"><a name="l00448"></a><span class="lineno"> 448</span>  ret = <a class="code" href="group__lavc__encoding.html#gaa2dc9e9ea2567ebb2801a08153c7306b">avcodec_encode_video2</a>(c, &pkt, frame, &got_output);</div>
<div class="line"><a name="l00449"></a><span class="lineno"> 449</span>  <span class="keywordflow">if</span> (ret < 0) {</div>
<div class="line"><a name="l00450"></a><span class="lineno"> 450</span>  fprintf(stderr, <span class="stringliteral">"Error encoding frame\n"</span>);</div>
<div class="line"><a name="l00451"></a><span class="lineno"> 451</span>  exit(1);</div>
<div class="line"><a name="l00452"></a><span class="lineno"> 452</span>  }</div>
<div class="line"><a name="l00453"></a><span class="lineno"> 453</span> </div>
<div class="line"><a name="l00454"></a><span class="lineno"> 454</span>  <span class="keywordflow">if</span> (got_output) {</div>
<div class="line"><a name="l00455"></a><span class="lineno"> 455</span>  printf(<span class="stringliteral">"Write frame %3d (size=%5d)\n"</span>, i, pkt.<a class="code" href="structAVPacket.html#a4d1ea19f63eb107111fd650ca514d1f4">size</a>);</div>
<div class="line"><a name="l00456"></a><span class="lineno"> 456</span>  fwrite(pkt.<a class="code" href="structAVPacket.html#aaf4fe58dfcc7c232c1f2268b539d8367">data</a>, 1, pkt.<a class="code" href="structAVPacket.html#a4d1ea19f63eb107111fd650ca514d1f4">size</a>, f);</div>
<div class="line"><a name="l00457"></a><span class="lineno"> 457</span>  <a class="code" href="group__lavc__packet.html#ga63d5a489b419bd5d45cfd09091cbcbc2">av_packet_unref</a>(&pkt);</div>
<div class="line"><a name="l00458"></a><span class="lineno"> 458</span>  }</div>
<div class="line"><a name="l00459"></a><span class="lineno"> 459</span>  }</div>
<div class="line"><a name="l00460"></a><span class="lineno"> 460</span> </div>
<div class="line"><a name="l00461"></a><span class="lineno"> 461</span>  <span class="comment">/* get the delayed frames */</span></div>
<div class="line"><a name="l00462"></a><span class="lineno"> 462</span>  <span class="keywordflow">for</span> (got_output = 1; got_output; i++) {</div>
<div class="line"><a name="l00463"></a><span class="lineno"> 463</span>  fflush(stdout);</div>
<div class="line"><a name="l00464"></a><span class="lineno"> 464</span> </div>
<div class="line"><a name="l00465"></a><span class="lineno"> 465</span>  ret = <a class="code" href="group__lavc__encoding.html#gaa2dc9e9ea2567ebb2801a08153c7306b">avcodec_encode_video2</a>(c, &pkt, NULL, &got_output);</div>
<div class="line"><a name="l00466"></a><span class="lineno"> 466</span>  <span class="keywordflow">if</span> (ret < 0) {</div>
<div class="line"><a name="l00467"></a><span class="lineno"> 467</span>  fprintf(stderr, <span class="stringliteral">"Error encoding frame\n"</span>);</div>
<div class="line"><a name="l00468"></a><span class="lineno"> 468</span>  exit(1);</div>
<div class="line"><a name="l00469"></a><span class="lineno"> 469</span>  }</div>
<div class="line"><a name="l00470"></a><span class="lineno"> 470</span> </div>
<div class="line"><a name="l00471"></a><span class="lineno"> 471</span>  <span class="keywordflow">if</span> (got_output) {</div>
<div class="line"><a name="l00472"></a><span class="lineno"> 472</span>  printf(<span class="stringliteral">"Write frame %3d (size=%5d)\n"</span>, i, pkt.<a class="code" href="structAVPacket.html#a4d1ea19f63eb107111fd650ca514d1f4">size</a>);</div>
<div class="line"><a name="l00473"></a><span class="lineno"> 473</span>  fwrite(pkt.<a class="code" href="structAVPacket.html#aaf4fe58dfcc7c232c1f2268b539d8367">data</a>, 1, pkt.<a class="code" href="structAVPacket.html#a4d1ea19f63eb107111fd650ca514d1f4">size</a>, f);</div>
<div class="line"><a name="l00474"></a><span class="lineno"> 474</span>  <a class="code" href="group__lavc__packet.html#ga63d5a489b419bd5d45cfd09091cbcbc2">av_packet_unref</a>(&pkt);</div>
<div class="line"><a name="l00475"></a><span class="lineno"> 475</span>  }</div>
<div class="line"><a name="l00476"></a><span class="lineno"> 476</span>  }</div>
<div class="line"><a name="l00477"></a><span class="lineno"> 477</span> </div>
<div class="line"><a name="l00478"></a><span class="lineno"> 478</span>  <span class="comment">/* add sequence end code to have a real mpeg file */</span></div>
<div class="line"><a name="l00479"></a><span class="lineno"> 479</span>  fwrite(endcode, 1, <span class="keyword">sizeof</span>(endcode), f);</div>
<div class="line"><a name="l00480"></a><span class="lineno"> 480</span>  fclose(f);</div>
<div class="line"><a name="l00481"></a><span class="lineno"> 481</span> </div>
<div class="line"><a name="l00482"></a><span class="lineno"> 482</span>  <a class="code" href="group__lavc__core.html#gaf4daa92361efb3523ef5afeb0b54077f">avcodec_close</a>(c);</div>
<div class="line"><a name="l00483"></a><span class="lineno"> 483</span>  <a class="code" href="group__lavu__mem.html#ga0c9096f498624c525aa2315b8a20c411">av_free</a>(c);</div>
<div class="line"><a name="l00484"></a><span class="lineno"> 484</span>  <a class="code" href="group__lavu__mem.html#ga0cc84043ea2167ad005c86e11d0bcdba">av_freep</a>(&frame-><a class="code" href="structAVFrame.html#a1d0f65014a8d1bf78cec8cbed2304992">data</a>[0]);</div>
<div class="line"><a name="l00485"></a><span class="lineno"> 485</span>  <a class="code" href="group__lavu__frame.html#ga979d73f3228814aee56aeca0636e37cc">av_frame_free</a>(&frame);</div>
<div class="line"><a name="l00486"></a><span class="lineno"> 486</span>  printf(<span class="stringliteral">"\n"</span>);</div>
<div class="line"><a name="l00487"></a><span class="lineno"> 487</span> }</div>
<div class="line"><a name="l00488"></a><span class="lineno"> 488</span> </div>
<div class="line"><a name="l00489"></a><span class="lineno"> 489</span> <span class="comment">/*</span></div>
<div class="line"><a name="l00490"></a><span class="lineno"> 490</span> <span class="comment"> * Video decoding example</span></div>
<div class="line"><a name="l00491"></a><span class="lineno"> 491</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00492"></a><span class="lineno"> 492</span> </div>
<div class="line"><a name="l00493"></a><span class="lineno"><a class="line" href="decoding__encoding_8c.html#aea973224783a5595366684c76c0ee06c"> 493</a></span> <span class="keyword">static</span> <span class="keywordtype">void</span> <a class="code" href="decoding__encoding_8c.html#aea973224783a5595366684c76c0ee06c">pgm_save</a>(<span class="keywordtype">unsigned</span> <span class="keywordtype">char</span> *buf, <span class="keywordtype">int</span> wrap, <span class="keywordtype">int</span> xsize, <span class="keywordtype">int</span> ysize,</div>
<div class="line"><a name="l00494"></a><span class="lineno"> 494</span>  <span class="keywordtype">char</span> *filename)</div>
<div class="line"><a name="l00495"></a><span class="lineno"> 495</span> {</div>
<div class="line"><a name="l00496"></a><span class="lineno"> 496</span>  FILE *f;</div>
<div class="line"><a name="l00497"></a><span class="lineno"> 497</span>  <span class="keywordtype">int</span> i;</div>
<div class="line"><a name="l00498"></a><span class="lineno"> 498</span> </div>
<div class="line"><a name="l00499"></a><span class="lineno"> 499</span>  f = fopen(filename,<span class="stringliteral">"w"</span>);</div>
<div class="line"><a name="l00500"></a><span class="lineno"> 500</span>  fprintf(f, <span class="stringliteral">"P5\n%d %d\n%d\n"</span>, xsize, ysize, 255);</div>
<div class="line"><a name="l00501"></a><span class="lineno"> 501</span>  <span class="keywordflow">for</span> (i = 0; i < ysize; i++)</div>
<div class="line"><a name="l00502"></a><span class="lineno"> 502</span>  fwrite(buf + i * wrap, 1, xsize, f);</div>
<div class="line"><a name="l00503"></a><span class="lineno"> 503</span>  fclose(f);</div>
<div class="line"><a name="l00504"></a><span class="lineno"> 504</span> }</div>
<div class="line"><a name="l00505"></a><span class="lineno"> 505</span> </div>
<div class="line"><a name="l00506"></a><span class="lineno"><a class="line" href="decoding__encoding_8c.html#a1d01e17e5817622d9419f681603f6c8f"> 506</a></span> <span class="keyword">static</span> <span class="keywordtype">int</span> <a class="code" href="decoding__encoding_8c.html#a1d01e17e5817622d9419f681603f6c8f">decode_write_frame</a>(<span class="keyword">const</span> <span class="keywordtype">char</span> *outfilename, <a class="code" href="structAVCodecContext.html">AVCodecContext</a> *avctx,</div>
<div class="line"><a name="l00507"></a><span class="lineno"> 507</span>  <a class="code" href="structAVFrame.html">AVFrame</a> *<a class="code" href="demuxing__decoding_8c.html#ad7d33d579a8d4241a5e643e39287a209">frame</a>, <span class="keywordtype">int</span> *frame_count, <a class="code" href="structAVPacket.html">AVPacket</a> *<a class="code" href="demuxing__decoding_8c.html#a3d4c6562f0b27cf0cacbbea5c038c090">pkt</a>, <span class="keywordtype">int</span> last)</div>
<div class="line"><a name="l00508"></a><span class="lineno"> 508</span> {</div>
<div class="line"><a name="l00509"></a><span class="lineno"> 509</span>  <span class="keywordtype">int</span> len, got_frame;</div>
<div class="line"><a name="l00510"></a><span class="lineno"> 510</span>  <span class="keywordtype">char</span> buf[1024];</div>
<div class="line"><a name="l00511"></a><span class="lineno"> 511</span> </div>
<div class="line"><a name="l00512"></a><span class="lineno"> 512</span>  len = <a class="code" href="group__lavc__decoding.html#ga99ee61b6dcffb7817a275d39da58cc74">avcodec_decode_video2</a>(avctx, frame, &got_frame, pkt);</div>
<div class="line"><a name="l00513"></a><span class="lineno"> 513</span>  <span class="keywordflow">if</span> (len < 0) {</div>
<div class="line"><a name="l00514"></a><span class="lineno"> 514</span>  fprintf(stderr, <span class="stringliteral">"Error while decoding frame %d\n"</span>, *frame_count);</div>
<div class="line"><a name="l00515"></a><span class="lineno"> 515</span>  <span class="keywordflow">return</span> len;</div>
<div class="line"><a name="l00516"></a><span class="lineno"> 516</span>  }</div>
<div class="line"><a name="l00517"></a><span class="lineno"> 517</span>  <span class="keywordflow">if</span> (got_frame) {</div>
<div class="line"><a name="l00518"></a><span class="lineno"> 518</span>  printf(<span class="stringliteral">"Saving %sframe %3d\n"</span>, last ? <span class="stringliteral">"last "</span> : <span class="stringliteral">""</span>, *frame_count);</div>
<div class="line"><a name="l00519"></a><span class="lineno"> 519</span>  fflush(stdout);</div>
<div class="line"><a name="l00520"></a><span class="lineno"> 520</span> </div>
<div class="line"><a name="l00521"></a><span class="lineno"> 521</span>  <span class="comment">/* the picture is allocated by the decoder, no need to free it */</span></div>
<div class="line"><a name="l00522"></a><span class="lineno"> 522</span>  snprintf(buf, <span class="keyword">sizeof</span>(buf), outfilename, *frame_count);</div>
<div class="line"><a name="l00523"></a><span class="lineno"> 523</span>  <a class="code" href="decoding__encoding_8c.html#aea973224783a5595366684c76c0ee06c">pgm_save</a>(frame-><a class="code" href="structAVFrame.html#a1d0f65014a8d1bf78cec8cbed2304992">data</a>[0], frame-><a class="code" href="structAVFrame.html#aa52bfc6605f6a3059a0c3226cc0f6567">linesize</a>[0],</div>
<div class="line"><a name="l00524"></a><span class="lineno"> 524</span>  frame-><a class="code" href="structAVFrame.html#a1e71ce60cedd5f3b6811714a9f7f9e0a">width</a>, frame-><a class="code" href="structAVFrame.html#a3f89733f429c98ba5bc64373fb0a3f13">height</a>, buf);</div>
<div class="line"><a name="l00525"></a><span class="lineno"> 525</span>  (*frame_count)++;</div>
<div class="line"><a name="l00526"></a><span class="lineno"> 526</span>  }</div>
<div class="line"><a name="l00527"></a><span class="lineno"> 527</span>  <span class="keywordflow">if</span> (pkt-><a class="code" href="structAVPacket.html#aaf4fe58dfcc7c232c1f2268b539d8367">data</a>) {</div>
<div class="line"><a name="l00528"></a><span class="lineno"> 528</span>  pkt-><a class="code" href="structAVPacket.html#a4d1ea19f63eb107111fd650ca514d1f4">size</a> -= len;</div>
<div class="line"><a name="l00529"></a><span class="lineno"> 529</span>  pkt-><a class="code" href="structAVPacket.html#aaf4fe58dfcc7c232c1f2268b539d8367">data</a> += len;</div>
<div class="line"><a name="l00530"></a><span class="lineno"> 530</span>  }</div>
<div class="line"><a name="l00531"></a><span class="lineno"> 531</span>  <span class="keywordflow">return</span> 0;</div>
<div class="line"><a name="l00532"></a><span class="lineno"> 532</span> }</div>
<div class="line"><a name="l00533"></a><span class="lineno"> 533</span> </div>
<div class="line"><a name="l00534"></a><span class="lineno"><a class="line" href="decoding__encoding_8c.html#a8b416e073a13f42326e97a86ce283db1"> 534</a></span> <span class="keyword">static</span> <span class="keywordtype">void</span> <a class="code" href="decoding__encoding_8c.html#a8b416e073a13f42326e97a86ce283db1">video_decode_example</a>(<span class="keyword">const</span> <span class="keywordtype">char</span> *outfilename, <span class="keyword">const</span> <span class="keywordtype">char</span> *filename)</div>
<div class="line"><a name="l00535"></a><span class="lineno"> 535</span> {</div>
<div class="line"><a name="l00536"></a><span class="lineno"> 536</span>  <a class="code" href="structAVCodec.html">AVCodec</a> *codec;</div>
<div class="line"><a name="l00537"></a><span class="lineno"> 537</span>  <a class="code" href="structAVCodecContext.html">AVCodecContext</a> *c= NULL;</div>
<div class="line"><a name="l00538"></a><span class="lineno"> 538</span>  <span class="keywordtype">int</span> frame_count;</div>
<div class="line"><a name="l00539"></a><span class="lineno"> 539</span>  FILE *f;</div>
<div class="line"><a name="l00540"></a><span class="lineno"> 540</span>  <a class="code" href="structAVFrame.html">AVFrame</a> *<a class="code" href="demuxing__decoding_8c.html#ad7d33d579a8d4241a5e643e39287a209">frame</a>;</div>
<div class="line"><a name="l00541"></a><span class="lineno"> 541</span>  uint8_t inbuf[<a class="code" href="decoding__encoding_8c.html#a6378f14810330164b7fb66f3334b2a27">INBUF_SIZE</a> + <a class="code" href="group__lavc__decoding.html#ga8f5b632a03ce83ac8e025894b1fc307a">AV_INPUT_BUFFER_PADDING_SIZE</a>];</div>
<div class="line"><a name="l00542"></a><span class="lineno"> 542</span>  <a class="code" href="structAVPacket.html">AVPacket</a> avpkt;</div>
<div class="line"><a name="l00543"></a><span class="lineno"> 543</span> </div>
<div class="line"><a name="l00544"></a><span class="lineno"> 544</span>  <a class="code" href="group__lavc__packet.html#gac9cb9756175b96e7441575803757fb73">av_init_packet</a>(&avpkt);</div>
<div class="line"><a name="l00545"></a><span class="lineno"> 545</span> </div>
<div class="line"><a name="l00546"></a><span class="lineno"> 546</span>  <span class="comment">/* set end of buffer to 0 (this ensures that no overreading happens for damaged mpeg streams) */</span></div>
<div class="line"><a name="l00547"></a><span class="lineno"> 547</span>  memset(inbuf + <a class="code" href="decoding__encoding_8c.html#a6378f14810330164b7fb66f3334b2a27">INBUF_SIZE</a>, 0, <a class="code" href="group__lavc__decoding.html#ga8f5b632a03ce83ac8e025894b1fc307a">AV_INPUT_BUFFER_PADDING_SIZE</a>);</div>
<div class="line"><a name="l00548"></a><span class="lineno"> 548</span> </div>
<div class="line"><a name="l00549"></a><span class="lineno"> 549</span>  printf(<span class="stringliteral">"Decode video file %s to %s\n"</span>, filename, outfilename);</div>
<div class="line"><a name="l00550"></a><span class="lineno"> 550</span> </div>
<div class="line"><a name="l00551"></a><span class="lineno"> 551</span>  <span class="comment">/* find the mpeg1 video decoder */</span></div>
<div class="line"><a name="l00552"></a><span class="lineno"> 552</span>  codec = <a class="code" href="group__lavc__decoding.html#ga19a0ca553277f019dd5b0fec6e1f9dca">avcodec_find_decoder</a>(<a class="code" href="group__lavc__core.html#ggaadca229ad2c20e060a14fec08a5cc7ceaf019b13f4891b36ae579cd7bc96d1f78">AV_CODEC_ID_MPEG1VIDEO</a>);</div>
<div class="line"><a name="l00553"></a><span class="lineno"> 553</span>  <span class="keywordflow">if</span> (!codec) {</div>
<div class="line"><a name="l00554"></a><span class="lineno"> 554</span>  fprintf(stderr, <span class="stringliteral">"Codec not found\n"</span>);</div>
<div class="line"><a name="l00555"></a><span class="lineno"> 555</span>  exit(1);</div>
<div class="line"><a name="l00556"></a><span class="lineno"> 556</span>  }</div>
<div class="line"><a name="l00557"></a><span class="lineno"> 557</span> </div>
<div class="line"><a name="l00558"></a><span class="lineno"> 558</span>  c = <a class="code" href="group__lavc__core.html#gae80afec6f26df6607eaacf39b561c315">avcodec_alloc_context3</a>(codec);</div>
<div class="line"><a name="l00559"></a><span class="lineno"> 559</span>  <span class="keywordflow">if</span> (!c) {</div>
<div class="line"><a name="l00560"></a><span class="lineno"> 560</span>  fprintf(stderr, <span class="stringliteral">"Could not allocate video codec context\n"</span>);</div>
<div class="line"><a name="l00561"></a><span class="lineno"> 561</span>  exit(1);</div>
<div class="line"><a name="l00562"></a><span class="lineno"> 562</span>  }</div>
<div class="line"><a name="l00563"></a><span class="lineno"> 563</span> </div>
<div class="line"><a name="l00564"></a><span class="lineno"> 564</span>  <span class="keywordflow">if</span> (codec-><a class="code" href="structAVCodec.html#af51f7ff3dac8b730f46b9713e49a2518">capabilities</a> & <a class="code" href="group__lavc__core.html#ga239656738c46ed6e3cde210a9390433a">AV_CODEC_CAP_TRUNCATED</a>)</div>
<div class="line"><a name="l00565"></a><span class="lineno"> 565</span>  c-><a class="code" href="structAVCodecContext.html#abb01e291550fa3fb96188af4d494587e">flags</a> |= <a class="code" href="group__lavc__core.html#ga74131d472b00ef60d8632702bfec0984">AV_CODEC_FLAG_TRUNCATED</a>; <span class="comment">// we do not send complete frames</span></div>
<div class="line"><a name="l00566"></a><span class="lineno"> 566</span> </div>
<div class="line"><a name="l00567"></a><span class="lineno"> 567</span>  <span class="comment">/* For some codecs, such as msmpeg4 and mpeg4, width and height</span></div>
<div class="line"><a name="l00568"></a><span class="lineno"> 568</span> <span class="comment"> MUST be initialized there because this information is not</span></div>
<div class="line"><a name="l00569"></a><span class="lineno"> 569</span> <span class="comment"> available in the bitstream. */</span></div>
<div class="line"><a name="l00570"></a><span class="lineno"> 570</span> </div>
<div class="line"><a name="l00571"></a><span class="lineno"> 571</span>  <span class="comment">/* open it */</span></div>
<div class="line"><a name="l00572"></a><span class="lineno"> 572</span>  <span class="keywordflow">if</span> (<a class="code" href="group__lavc__core.html#ga11f785a188d7d9df71621001465b0f1d">avcodec_open2</a>(c, codec, NULL) < 0) {</div>
<div class="line"><a name="l00573"></a><span class="lineno"> 573</span>  fprintf(stderr, <span class="stringliteral">"Could not open codec\n"</span>);</div>
<div class="line"><a name="l00574"></a><span class="lineno"> 574</span>  exit(1);</div>
<div class="line"><a name="l00575"></a><span class="lineno"> 575</span>  }</div>
<div class="line"><a name="l00576"></a><span class="lineno"> 576</span> </div>
<div class="line"><a name="l00577"></a><span class="lineno"> 577</span>  f = fopen(filename, <span class="stringliteral">"rb"</span>);</div>
<div class="line"><a name="l00578"></a><span class="lineno"> 578</span>  <span class="keywordflow">if</span> (!f) {</div>
<div class="line"><a name="l00579"></a><span class="lineno"> 579</span>  fprintf(stderr, <span class="stringliteral">"Could not open %s\n"</span>, filename);</div>
<div class="line"><a name="l00580"></a><span class="lineno"> 580</span>  exit(1);</div>
<div class="line"><a name="l00581"></a><span class="lineno"> 581</span>  }</div>
<div class="line"><a name="l00582"></a><span class="lineno"> 582</span> </div>
<div class="line"><a name="l00583"></a><span class="lineno"> 583</span>  frame = <a class="code" href="group__lavu__frame.html#gac700017c5270c79c1e1befdeeb008b2f">av_frame_alloc</a>();</div>
<div class="line"><a name="l00584"></a><span class="lineno"> 584</span>  <span class="keywordflow">if</span> (!frame) {</div>
<div class="line"><a name="l00585"></a><span class="lineno"> 585</span>  fprintf(stderr, <span class="stringliteral">"Could not allocate video frame\n"</span>);</div>
<div class="line"><a name="l00586"></a><span class="lineno"> 586</span>  exit(1);</div>
<div class="line"><a name="l00587"></a><span class="lineno"> 587</span>  }</div>
<div class="line"><a name="l00588"></a><span class="lineno"> 588</span> </div>
<div class="line"><a name="l00589"></a><span class="lineno"> 589</span>  frame_count = 0;</div>
<div class="line"><a name="l00590"></a><span class="lineno"> 590</span>  <span class="keywordflow">for</span> (;;) {</div>
<div class="line"><a name="l00591"></a><span class="lineno"> 591</span>  avpkt.<a class="code" href="structAVPacket.html#a4d1ea19f63eb107111fd650ca514d1f4">size</a> = fread(inbuf, 1, <a class="code" href="decoding__encoding_8c.html#a6378f14810330164b7fb66f3334b2a27">INBUF_SIZE</a>, f);</div>
<div class="line"><a name="l00592"></a><span class="lineno"> 592</span>  <span class="keywordflow">if</span> (avpkt.<a class="code" href="structAVPacket.html#a4d1ea19f63eb107111fd650ca514d1f4">size</a> == 0)</div>
<div class="line"><a name="l00593"></a><span class="lineno"> 593</span>  <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00594"></a><span class="lineno"> 594</span> </div>
<div class="line"><a name="l00595"></a><span class="lineno"> 595</span>  <span class="comment">/* NOTE1: some codecs are stream based (mpegvideo, mpegaudio)</span></div>
<div class="line"><a name="l00596"></a><span class="lineno"> 596</span> <span class="comment"> and this is the only method to use them because you cannot</span></div>
<div class="line"><a name="l00597"></a><span class="lineno"> 597</span> <span class="comment"> know the compressed data size before analysing it.</span></div>
<div class="line"><a name="l00598"></a><span class="lineno"> 598</span> <span class="comment"></span></div>
<div class="line"><a name="l00599"></a><span class="lineno"> 599</span> <span class="comment"> BUT some other codecs (msmpeg4, mpeg4) are inherently frame</span></div>
<div class="line"><a name="l00600"></a><span class="lineno"> 600</span> <span class="comment"> based, so you must call them with all the data for one</span></div>
<div class="line"><a name="l00601"></a><span class="lineno"> 601</span> <span class="comment"> frame exactly. You must also initialize 'width' and</span></div>
<div class="line"><a name="l00602"></a><span class="lineno"> 602</span> <span class="comment"> 'height' before initializing them. */</span></div>
<div class="line"><a name="l00603"></a><span class="lineno"> 603</span> </div>
<div class="line"><a name="l00604"></a><span class="lineno"> 604</span>  <span class="comment">/* NOTE2: some codecs allow the raw parameters (frame size,</span></div>
<div class="line"><a name="l00605"></a><span class="lineno"> 605</span> <span class="comment"> sample rate) to be changed at any frame. We handle this, so</span></div>
<div class="line"><a name="l00606"></a><span class="lineno"> 606</span> <span class="comment"> you should also take care of it */</span></div>
<div class="line"><a name="l00607"></a><span class="lineno"> 607</span> </div>
<div class="line"><a name="l00608"></a><span class="lineno"> 608</span>  <span class="comment">/* here, we use a stream based decoder (mpeg1video), so we</span></div>
<div class="line"><a name="l00609"></a><span class="lineno"> 609</span> <span class="comment"> feed decoder and see if it could decode a frame */</span></div>
<div class="line"><a name="l00610"></a><span class="lineno"> 610</span>  avpkt.<a class="code" href="structAVPacket.html#aaf4fe58dfcc7c232c1f2268b539d8367">data</a> = inbuf;</div>
<div class="line"><a name="l00611"></a><span class="lineno"> 611</span>  <span class="keywordflow">while</span> (avpkt.<a class="code" href="structAVPacket.html#a4d1ea19f63eb107111fd650ca514d1f4">size</a> > 0)</div>
<div class="line"><a name="l00612"></a><span class="lineno"> 612</span>  <span class="keywordflow">if</span> (<a class="code" href="decoding__encoding_8c.html#a1d01e17e5817622d9419f681603f6c8f">decode_write_frame</a>(outfilename, c, frame, &frame_count, &avpkt, 0) < 0)</div>
<div class="line"><a name="l00613"></a><span class="lineno"> 613</span>  exit(1);</div>
<div class="line"><a name="l00614"></a><span class="lineno"> 614</span>  }</div>
<div class="line"><a name="l00615"></a><span class="lineno"> 615</span> </div>
<div class="line"><a name="l00616"></a><span class="lineno"> 616</span>  <span class="comment">/* some codecs, such as MPEG, transmit the I and P frame with a</span></div>
<div class="line"><a name="l00617"></a><span class="lineno"> 617</span> <span class="comment"> latency of one frame. You must do the following to have a</span></div>
<div class="line"><a name="l00618"></a><span class="lineno"> 618</span> <span class="comment"> chance to get the last frame of the video */</span></div>
<div class="line"><a name="l00619"></a><span class="lineno"> 619</span>  avpkt.<a class="code" href="structAVPacket.html#aaf4fe58dfcc7c232c1f2268b539d8367">data</a> = NULL;</div>
<div class="line"><a name="l00620"></a><span class="lineno"> 620</span>  avpkt.<a class="code" href="structAVPacket.html#a4d1ea19f63eb107111fd650ca514d1f4">size</a> = 0;</div>
<div class="line"><a name="l00621"></a><span class="lineno"> 621</span>  <a class="code" href="decoding__encoding_8c.html#a1d01e17e5817622d9419f681603f6c8f">decode_write_frame</a>(outfilename, c, frame, &frame_count, &avpkt, 1);</div>
<div class="line"><a name="l00622"></a><span class="lineno"> 622</span> </div>
<div class="line"><a name="l00623"></a><span class="lineno"> 623</span>  fclose(f);</div>
<div class="line"><a name="l00624"></a><span class="lineno"> 624</span> </div>
<div class="line"><a name="l00625"></a><span class="lineno"> 625</span>  <a class="code" href="group__lavc__core.html#gaf4daa92361efb3523ef5afeb0b54077f">avcodec_close</a>(c);</div>
<div class="line"><a name="l00626"></a><span class="lineno"> 626</span>  <a class="code" href="group__lavu__mem.html#ga0c9096f498624c525aa2315b8a20c411">av_free</a>(c);</div>
<div class="line"><a name="l00627"></a><span class="lineno"> 627</span>  <a class="code" href="group__lavu__frame.html#ga979d73f3228814aee56aeca0636e37cc">av_frame_free</a>(&frame);</div>
<div class="line"><a name="l00628"></a><span class="lineno"> 628</span>  printf(<span class="stringliteral">"\n"</span>);</div>
<div class="line"><a name="l00629"></a><span class="lineno"> 629</span> }</div>
<div class="line"><a name="l00630"></a><span class="lineno"> 630</span> </div>
<div class="line"><a name="l00631"></a><span class="lineno"><a class="line" href="decoding__encoding_8c.html#a3c04138a5bfe5d72780bb7e82a18e627"> 631</a></span> <span class="keywordtype">int</span> <a class="code" href="decoding__encoding_8c.html#a3c04138a5bfe5d72780bb7e82a18e627">main</a>(<span class="keywordtype">int</span> argc, <span class="keywordtype">char</span> **argv)</div>
<div class="line"><a name="l00632"></a><span class="lineno"> 632</span> {</div>
<div class="line"><a name="l00633"></a><span class="lineno"> 633</span>  <span class="keyword">const</span> <span class="keywordtype">char</span> *output_type;</div>
<div class="line"><a name="l00634"></a><span class="lineno"> 634</span> </div>
<div class="line"><a name="l00635"></a><span class="lineno"> 635</span>  <span class="comment">/* register all the codecs */</span></div>
<div class="line"><a name="l00636"></a><span class="lineno"> 636</span>  <a class="code" href="group__lavc__core.html#gaf1a2bb4e7c7611c131bb6212bf0fa639">avcodec_register_all</a>();</div>
<div class="line"><a name="l00637"></a><span class="lineno"> 637</span> </div>
<div class="line"><a name="l00638"></a><span class="lineno"> 638</span>  <span class="keywordflow">if</span> (argc < 2) {</div>
<div class="line"><a name="l00639"></a><span class="lineno"> 639</span>  printf(<span class="stringliteral">"usage: %s output_type\n"</span></div>
<div class="line"><a name="l00640"></a><span class="lineno"> 640</span>  <span class="stringliteral">"API example program to decode/encode a media stream with libavcodec.\n"</span></div>
<div class="line"><a name="l00641"></a><span class="lineno"> 641</span>  <span class="stringliteral">"This program generates a synthetic stream and encodes it to a file\n"</span></div>
<div class="line"><a name="l00642"></a><span class="lineno"> 642</span>  <span class="stringliteral">"named test.h264, test.mp2 or test.mpg depending on output_type.\n"</span></div>
<div class="line"><a name="l00643"></a><span class="lineno"> 643</span>  <span class="stringliteral">"The encoded stream is then decoded and written to a raw data output.\n"</span></div>
<div class="line"><a name="l00644"></a><span class="lineno"> 644</span>  <span class="stringliteral">"output_type must be chosen between 'h264', 'mp2', 'mpg'.\n"</span>,</div>
<div class="line"><a name="l00645"></a><span class="lineno"> 645</span>  argv[0]);</div>
<div class="line"><a name="l00646"></a><span class="lineno"> 646</span>  <span class="keywordflow">return</span> 1;</div>
<div class="line"><a name="l00647"></a><span class="lineno"> 647</span>  }</div>
<div class="line"><a name="l00648"></a><span class="lineno"> 648</span>  output_type = argv[1];</div>
<div class="line"><a name="l00649"></a><span class="lineno"> 649</span> </div>
<div class="line"><a name="l00650"></a><span class="lineno"> 650</span>  <span class="keywordflow">if</span> (!strcmp(output_type, <span class="stringliteral">"h264"</span>)) {</div>
<div class="line"><a name="l00651"></a><span class="lineno"> 651</span>  <a class="code" href="decoding__encoding_8c.html#a7293f14f6e6315d54331137ae883079f">video_encode_example</a>(<span class="stringliteral">"test.h264"</span>, <a class="code" href="group__lavc__core.html#ggaadca229ad2c20e060a14fec08a5cc7cea3d4c051c8b18a3c18750676a308c10be">AV_CODEC_ID_H264</a>);</div>
<div class="line"><a name="l00652"></a><span class="lineno"> 652</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (!strcmp(output_type, <span class="stringliteral">"mp2"</span>)) {</div>
<div class="line"><a name="l00653"></a><span class="lineno"> 653</span>  <a class="code" href="decoding__encoding_8c.html#a67ded2b27004b72c27d4f3500a578ff6">audio_encode_example</a>(<span class="stringliteral">"test.mp2"</span>);</div>
<div class="line"><a name="l00654"></a><span class="lineno"> 654</span>  <a class="code" href="decoding__encoding_8c.html#a5cbf8bd3441619622d3956d623d944b3">audio_decode_example</a>(<span class="stringliteral">"test.pcm"</span>, <span class="stringliteral">"test.mp2"</span>);</div>
<div class="line"><a name="l00655"></a><span class="lineno"> 655</span>  } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (!strcmp(output_type, <span class="stringliteral">"mpg"</span>)) {</div>
<div class="line"><a name="l00656"></a><span class="lineno"> 656</span>  <a class="code" href="decoding__encoding_8c.html#a7293f14f6e6315d54331137ae883079f">video_encode_example</a>(<span class="stringliteral">"test.mpg"</span>, <a class="code" href="group__lavc__core.html#ggaadca229ad2c20e060a14fec08a5cc7ceaf019b13f4891b36ae579cd7bc96d1f78">AV_CODEC_ID_MPEG1VIDEO</a>);</div>
<div class="line"><a name="l00657"></a><span class="lineno"> 657</span>  <a class="code" href="decoding__encoding_8c.html#a8b416e073a13f42326e97a86ce283db1">video_decode_example</a>(<span class="stringliteral">"test%02d.pgm"</span>, <span class="stringliteral">"test.mpg"</span>);</div>
<div class="line"><a name="l00658"></a><span class="lineno"> 658</span>  } <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00659"></a><span class="lineno"> 659</span>  fprintf(stderr, <span class="stringliteral">"Invalid output type '%s', choose between 'h264', 'mp2', or 'mpg'\n"</span>,</div>
<div class="line"><a name="l00660"></a><span class="lineno"> 660</span>  output_type);</div>
<div class="line"><a name="l00661"></a><span class="lineno"> 661</span>  <span class="keywordflow">return</span> 1;</div>
<div class="line"><a name="l00662"></a><span class="lineno"> 662</span>  }</div>
<div class="line"><a name="l00663"></a><span class="lineno"> 663</span> </div>
<div class="line"><a name="l00664"></a><span class="lineno"> 664</span>  <span class="keywordflow">return</span> 0;</div>
<div class="line"><a name="l00665"></a><span class="lineno"> 665</span> }</div>
<div class="ttc" id="decoding__encoding_8c_html_a93df45821682fdbabbc0092abff0bd61"><div class="ttname"><a href="decoding__encoding_8c.html#a93df45821682fdbabbc0092abff0bd61">check_sample_fmt</a></div><div class="ttdeci">static int check_sample_fmt(AVCodec *codec, enum AVSampleFormat sample_fmt)</div><div class="ttdef"><b>Definition:</b> <a href="decoding__encoding_8c_source.html#l00048">decoding_encoding.c:48</a></div></div>
<div class="ttc" id="group__lavu__mem_html_ga9722446c5e310ffedfaac9489864796d"><div class="ttname"><a href="group__lavu__mem.html#ga9722446c5e310ffedfaac9489864796d">av_malloc</a></div><div class="ttdeci">void * av_malloc(size_t size) av_malloc_attrib 1(1)</div><div class="ttdoc">Allocate a block of size bytes with alignment suitable for all memory accesses (including vectors if ...</div></div>
<div class="ttc" id="structAVFrame_html"><div class="ttname"><a href="structAVFrame.html">AVFrame</a></div><div class="ttdoc">This structure describes decoded (raw) audio or video data. </div><div class="ttdef"><b>Definition:</b> <a href="frame_8h_source.html#l00181">frame.h:181</a></div></div>
<div class="ttc" id="group__lavc__encoding_html_ga9f820c481615c3a02d0407bac0bdbf25"><div class="ttname"><a href="group__lavc__encoding.html#ga9f820c481615c3a02d0407bac0bdbf25">avcodec_find_encoder</a></div><div class="ttdeci">AVCodec * avcodec_find_encoder(enum AVCodecID id)</div><div class="ttdoc">Find a registered encoder with a matching codec ID. </div></div>
<div class="ttc" id="imgutils_8h_html"><div class="ttname"><a href="imgutils_8h.html">imgutils.h</a></div><div class="ttdoc">misc image utilities </div></div>
<div class="ttc" id="structAVCodecContext_html_a6b53fda85ad61baa345edbd96cb8a33c"><div class="ttname"><a href="structAVCodecContext.html#a6b53fda85ad61baa345edbd96cb8a33c">AVCodecContext::bit_rate</a></div><div class="ttdeci">int64_t bit_rate</div><div class="ttdoc">the average bitrate </div><div class="ttdef"><b>Definition:</b> <a href="avcodec_8h_source.html#l01597">avcodec.h:1597</a></div></div>
<div class="ttc" id="group__lavu__picture_html_ga841e0a89a642e24141af1918a2c10448"><div class="ttname"><a href="group__lavu__picture.html#ga841e0a89a642e24141af1918a2c10448">av_image_alloc</a></div><div class="ttdeci">int av_image_alloc(uint8_t *pointers[4], int linesizes[4], int w, int h, enum AVPixelFormat pix_fmt, int align)</div><div class="ttdoc">Allocate an image with size w and h and pixel format pix_fmt, and fill pointers and linesizes accordi...</div></div>
<div class="ttc" id="structAVCodecContext_html_a3e5334a611a3e2a6a653805bb9e2d4d4"><div class="ttname"><a href="structAVCodecContext.html#a3e5334a611a3e2a6a653805bb9e2d4d4">AVCodecContext::max_b_frames</a></div><div class="ttdeci">int max_b_frames</div><div class="ttdoc">maximum number of B-frames between non-B-frames Note: The output will be delayed by max_b_frames+1 re...</div><div class="ttdef"><b>Definition:</b> <a href="avcodec_8h_source.html#l01810">avcodec.h:1810</a></div></div>
<div class="ttc" id="structAVPacket_html_a4d1ea19f63eb107111fd650ca514d1f4"><div class="ttname"><a href="structAVPacket.html#a4d1ea19f63eb107111fd650ca514d1f4">AVPacket::size</a></div><div class="ttdeci">int size</div><div class="ttdef"><b>Definition:</b> <a href="avcodec_8h_source.html#l01468">avcodec.h:1468</a></div></div>
<div class="ttc" id="group__lavu__sampfmts_html_ggaf9a51ca15301871723577c730b5865c5ac5d4bb5b0fb0dc7316fb3c7a73029912"><div class="ttname"><a href="group__lavu__sampfmts.html#ggaf9a51ca15301871723577c730b5865c5ac5d4bb5b0fb0dc7316fb3c7a73029912">AV_SAMPLE_FMT_NONE</a></div><div class="ttdef"><b>Definition:</b> <a href="samplefmt_8h_source.html#l00060">samplefmt.h:60</a></div></div>
<div class="ttc" id="structAVCodecContext_html_a0425c77b3d06d71e5db88b1d7e1b37f2"><div class="ttname"><a href="structAVCodecContext.html#a0425c77b3d06d71e5db88b1d7e1b37f2">AVCodecContext::pix_fmt</a></div><div class="ttdeci">enum AVPixelFormat pix_fmt</div><div class="ttdoc">Pixel format, see AV_PIX_FMT_xxx. </div><div class="ttdef"><b>Definition:</b> <a href="avcodec_8h_source.html#l01752">avcodec.h:1752</a></div></div>
<div class="ttc" id="decoding__encoding_8c_html_a8b416e073a13f42326e97a86ce283db1"><div class="ttname"><a href="decoding__encoding_8c.html#a8b416e073a13f42326e97a86ce283db1">video_decode_example</a></div><div class="ttdeci">static void video_decode_example(const char *outfilename, const char *filename)</div><div class="ttdef"><b>Definition:</b> <a href="decoding__encoding_8c_source.html#l00534">decoding_encoding.c:534</a></div></div>
<div class="ttc" id="samplefmt_8h_html"><div class="ttname"><a href="samplefmt_8h.html">samplefmt.h</a></div></div>
<div class="ttc" id="demuxing__decoding_8c_html_a3d4c6562f0b27cf0cacbbea5c038c090"><div class="ttname"><a href="demuxing__decoding_8c.html#a3d4c6562f0b27cf0cacbbea5c038c090">pkt</a></div><div class="ttdeci">static AVPacket pkt</div><div class="ttdef"><b>Definition:</b> <a href="demuxing__decoding_8c_source.html#l00054">demuxing_decoding.c:54</a></div></div>
<div class="ttc" id="group__lavc__encoding_html_ga93a49fbd0973b216dcb8a8c5dffe1d82"><div class="ttname"><a href="group__lavc__encoding.html#ga93a49fbd0973b216dcb8a8c5dffe1d82">avcodec_encode_audio2</a></div><div class="ttdeci">int avcodec_encode_audio2(AVCodecContext *avctx, AVPacket *avpkt, const AVFrame *frame, int *got_packet_ptr)</div><div class="ttdoc">Encode a frame of audio. </div></div>
<div class="ttc" id="group__channel__mask__c_html_gabc6d6651bba254cd0fa2c42a57228e65"><div class="ttname"><a href="group__channel__mask__c.html#gabc6d6651bba254cd0fa2c42a57228e65">AV_CH_LAYOUT_STEREO</a></div><div class="ttdeci">#define AV_CH_LAYOUT_STEREO</div><div class="ttdef"><b>Definition:</b> <a href="channel__layout_8h_source.html#l00086">channel_layout.h:86</a></div></div>
<div class="ttc" id="group__lavc__core_html_gaf1a2bb4e7c7611c131bb6212bf0fa639"><div class="ttname"><a href="group__lavc__core.html#gaf1a2bb4e7c7611c131bb6212bf0fa639">avcodec_register_all</a></div><div class="ttdeci">void avcodec_register_all(void)</div><div class="ttdoc">Register all the codecs, parsers and bitstream filters which were enabled at configuration time...</div></div>
<div class="ttc" id="group__lavc__core_html_ggaadca229ad2c20e060a14fec08a5cc7cea3d4c051c8b18a3c18750676a308c10be"><div class="ttname"><a href="group__lavc__core.html#ggaadca229ad2c20e060a14fec08a5cc7cea3d4c051c8b18a3c18750676a308c10be">AV_CODEC_ID_H264</a></div><div class="ttdef"><b>Definition:</b> <a href="avcodec_8h_source.html#l00134">avcodec.h:134</a></div></div>
<div class="ttc" id="structAVCodec_html"><div class="ttname"><a href="structAVCodec.html">AVCodec</a></div><div class="ttdoc">AVCodec. </div><div class="ttdef"><b>Definition:</b> <a href="avcodec_8h_source.html#l03392">avcodec.h:3392</a></div></div>
<div class="ttc" id="structAVCodecContext_html_ab7bfeb9fa5840aac090e2b0bd0ef7589"><div class="ttname"><a href="structAVCodecContext.html#ab7bfeb9fa5840aac090e2b0bd0ef7589">AVCodecContext::time_base</a></div><div class="ttdeci">AVRational time_base</div><div class="ttdoc">This is the fundamental unit of time (in seconds) in terms of which frame timestamps are represented...</div><div class="ttdef"><b>Definition:</b> <a href="avcodec_8h_source.html#l01661">avcodec.h:1661</a></div></div>
<div class="ttc" id="group__lavu__mem_html_ga0cc84043ea2167ad005c86e11d0bcdba"><div class="ttname"><a href="group__lavu__mem.html#ga0cc84043ea2167ad005c86e11d0bcdba">av_freep</a></div><div class="ttdeci">void av_freep(void *ptr)</div><div class="ttdoc">Free a memory block which has been allocated with av_malloc(z)() or av_realloc() and set the pointer ...</div></div>
<div class="ttc" id="group__channel__mask__c_html_gac95619abeb32e4a3daa18e3ff3419380"><div class="ttname"><a href="group__channel__mask__c.html#gac95619abeb32e4a3daa18e3ff3419380">av_get_channel_layout_nb_channels</a></div><div class="ttdeci">int av_get_channel_layout_nb_channels(uint64_t channel_layout)</div><div class="ttdoc">Return the number of channels in the channel layout. </div></div>
<div class="ttc" id="group__lavc__misc_html_ga66b44aad56fa22a78fb8916eb8cc0516"><div class="ttname"><a href="group__lavc__misc.html#ga66b44aad56fa22a78fb8916eb8cc0516">avcodec_fill_audio_frame</a></div><div class="ttdeci">int avcodec_fill_audio_frame(AVFrame *frame, int nb_channels, enum AVSampleFormat sample_fmt, const uint8_t *buf, int buf_size, int align)</div><div class="ttdoc">Fill AVFrame audio data and linesize pointers. </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="structAVCodecContext_html_a1bdba69ea111e2a9d03fdaa7a46a4c45"><div class="ttname"><a href="structAVCodecContext.html#a1bdba69ea111e2a9d03fdaa7a46a4c45">AVCodecContext::sample_fmt</a></div><div class="ttdeci">enum AVSampleFormat sample_fmt</div><div class="ttdoc">audio sample format </div><div class="ttdef"><b>Definition:</b> <a href="avcodec_8h_source.html#l02295">avcodec.h:2295</a></div></div>
<div class="ttc" id="group__lavu__frame_html_gac700017c5270c79c1e1befdeeb008b2f"><div class="ttname"><a href="group__lavu__frame.html#gac700017c5270c79c1e1befdeeb008b2f">av_frame_alloc</a></div><div class="ttdeci">AVFrame * av_frame_alloc(void)</div><div class="ttdoc">Allocate an AVFrame and set its fields to default values. </div></div>
<div class="ttc" id="opt_8h_html"><div class="ttname"><a href="opt_8h.html">opt.h</a></div><div class="ttdoc">AVOptions. </div></div>
<div class="ttc" id="structAVFrame_html_a0452833e3ab6ddd7acbf82817a7818a4"><div class="ttname"><a href="structAVFrame.html#a0452833e3ab6ddd7acbf82817a7818a4">AVFrame::pts</a></div><div class="ttdeci">int64_t pts</div><div class="ttdoc">Presentation timestamp in time_base units (time when frame should be shown to user). </div><div class="ttdef"><b>Definition:</b> <a href="frame_8h_source.html#l00262">frame.h:262</a></div></div>
<div class="ttc" id="group__lavc__encoding_html_gaa2dc9e9ea2567ebb2801a08153c7306b"><div class="ttname"><a href="group__lavc__encoding.html#gaa2dc9e9ea2567ebb2801a08153c7306b">avcodec_encode_video2</a></div><div class="ttdeci">int avcodec_encode_video2(AVCodecContext *avctx, AVPacket *avpkt, const AVFrame *frame, int *got_packet_ptr)</div><div class="ttdoc">Encode a frame of video. </div></div>
<div class="ttc" id="demuxing__decoding_8c_html_ad7d33d579a8d4241a5e643e39287a209"><div class="ttname"><a href="demuxing__decoding_8c.html#ad7d33d579a8d4241a5e643e39287a209">frame</a></div><div class="ttdeci">static AVFrame * frame</div><div class="ttdef"><b>Definition:</b> <a href="demuxing__decoding_8c_source.html#l00053">demuxing_decoding.c:53</a></div></div>
<div class="ttc" id="structAVPacket_html_aaf4fe58dfcc7c232c1f2268b539d8367"><div class="ttname"><a href="structAVPacket.html#aaf4fe58dfcc7c232c1f2268b539d8367">AVPacket::data</a></div><div class="ttdeci">uint8_t * data</div><div class="ttdef"><b>Definition:</b> <a href="avcodec_8h_source.html#l01467">avcodec.h:1467</a></div></div>
<div class="ttc" id="decoding__encoding_8c_html_aea973224783a5595366684c76c0ee06c"><div class="ttname"><a href="decoding__encoding_8c.html#aea973224783a5595366684c76c0ee06c">pgm_save</a></div><div class="ttdeci">static void pgm_save(unsigned char *buf, int wrap, int xsize, int ysize, char *filename)</div><div class="ttdef"><b>Definition:</b> <a href="decoding__encoding_8c_source.html#l00493">decoding_encoding.c:493</a></div></div>
<div class="ttc" id="decoding__encoding_8c_html_a5809ff9edcce25b26466e3c806bf9854"><div class="ttname"><a href="decoding__encoding_8c.html#a5809ff9edcce25b26466e3c806bf9854">select_sample_rate</a></div><div class="ttdeci">static int select_sample_rate(AVCodec *codec)</div><div class="ttdef"><b>Definition:</b> <a href="decoding__encoding_8c_source.html#l00061">decoding_encoding.c:61</a></div></div>
<div class="ttc" id="group__lavc__core_html_ggaadca229ad2c20e060a14fec08a5cc7ceaf019b13f4891b36ae579cd7bc96d1f78"><div class="ttname"><a href="group__lavc__core.html#ggaadca229ad2c20e060a14fec08a5cc7ceaf019b13f4891b36ae579cd7bc96d1f78">AV_CODEC_ID_MPEG1VIDEO</a></div><div class="ttdef"><b>Definition:</b> <a href="avcodec_8h_source.html#l00105">avcodec.h:105</a></div></div>
<div class="ttc" id="group__lavc__core_html_gaf4daa92361efb3523ef5afeb0b54077f"><div class="ttname"><a href="group__lavc__core.html#gaf4daa92361efb3523ef5afeb0b54077f">avcodec_close</a></div><div class="ttdeci">int avcodec_close(AVCodecContext *avctx)</div><div class="ttdoc">Close a given AVCodecContext and free all the data associated with it (but not the AVCodecContext its...</div></div>
<div class="ttc" id="structAVCodec_html_a1d4c5152626bbd1f575a3e0014cb59e7"><div class="ttname"><a href="structAVCodec.html#a1d4c5152626bbd1f575a3e0014cb59e7">AVCodec::channel_layouts</a></div><div class="ttdeci">const uint64_t * channel_layouts</div><div class="ttdoc">array of support channel layouts, or NULL if unknown. array is terminated by 0 </div><div class="ttdef"><b>Definition:</b> <a href="avcodec_8h_source.html#l03416">avcodec.h:3416</a></div></div>
<div class="ttc" id="structAVFrame_html_a1e71ce60cedd5f3b6811714a9f7f9e0a"><div class="ttname"><a href="structAVFrame.html#a1e71ce60cedd5f3b6811714a9f7f9e0a">AVFrame::width</a></div><div class="ttdeci">int width</div><div class="ttdoc">width and height of the video frame </div><div class="ttdef"><b>Definition:</b> <a href="frame_8h_source.html#l00230">frame.h:230</a></div></div>
<div class="ttc" id="group__lavu__mem_html_ga0c9096f498624c525aa2315b8a20c411"><div class="ttname"><a href="group__lavu__mem.html#ga0c9096f498624c525aa2315b8a20c411">av_free</a></div><div class="ttdeci">void av_free(void *ptr)</div><div class="ttdoc">Free a memory block which has been allocated with av_malloc(z)() or av_realloc(). ...</div></div>
<div class="ttc" id="group__lavc__decoding_html_ga99ee61b6dcffb7817a275d39da58cc74"><div class="ttname"><a href="group__lavc__decoding.html#ga99ee61b6dcffb7817a275d39da58cc74">avcodec_decode_video2</a></div><div class="ttdeci">int avcodec_decode_video2(AVCodecContext *avctx, AVFrame *picture, int *got_picture_ptr, const AVPacket *avpkt)</div><div class="ttdoc">Decode the video frame of size avpkt->size from avpkt->data into picture. </div></div>
<div class="ttc" id="group__lavu__frame_html_ga979d73f3228814aee56aeca0636e37cc"><div class="ttname"><a href="group__lavu__frame.html#ga979d73f3228814aee56aeca0636e37cc">av_frame_free</a></div><div class="ttdeci">void av_frame_free(AVFrame **frame)</div><div class="ttdoc">Free the frame and any dynamically allocated objects in it, e.g. </div></div>
<div class="ttc" id="structAVCodec_html_af51f7ff3dac8b730f46b9713e49a2518"><div class="ttname"><a href="structAVCodec.html#af51f7ff3dac8b730f46b9713e49a2518">AVCodec::capabilities</a></div><div class="ttdeci">int capabilities</div><div class="ttdoc">Codec capabilities. </div><div class="ttdef"><b>Definition:</b> <a href="avcodec_8h_source.html#l03411">avcodec.h:3411</a></div></div>
<div class="ttc" id="structAVCodecContext_html_abb01e291550fa3fb96188af4d494587e"><div class="ttname"><a href="structAVCodecContext.html#abb01e291550fa3fb96188af4d494587e">AVCodecContext::flags</a></div><div class="ttdeci">int flags</div><div class="ttdoc">AV_CODEC_FLAG_*. </div><div class="ttdef"><b>Definition:</b> <a href="avcodec_8h_source.html#l01627">avcodec.h:1627</a></div></div>
<div class="ttc" id="group__lavu__sampfmts_html_ga31b9d149b2de9821a65f4f5612970838"><div class="ttname"><a href="group__lavu__sampfmts.html#ga31b9d149b2de9821a65f4f5612970838">av_get_sample_fmt_name</a></div><div class="ttdeci">const char * av_get_sample_fmt_name(enum AVSampleFormat sample_fmt)</div><div class="ttdoc">Return the name of sample_fmt, or NULL if sample_fmt is not recognized. </div></div>
<div class="ttc" id="common_8h_html_a9960bd6780a9b16a216a57be1ee04359"><div class="ttname"><a href="common_8h.html#a9960bd6780a9b16a216a57be1ee04359">FFMAX</a></div><div class="ttdeci">#define FFMAX(a, b)</div><div class="ttdef"><b>Definition:</b> <a href="common_8h_source.html#l00094">common.h:94</a></div></div>
<div class="ttc" id="decoding__encoding_8c_html_aebbadad5d16117f57006e8358ebf1ccc"><div class="ttname"><a href="decoding__encoding_8c.html#aebbadad5d16117f57006e8358ebf1ccc">AUDIO_REFILL_THRESH</a></div><div class="ttdeci">#define AUDIO_REFILL_THRESH</div><div class="ttdef"><b>Definition:</b> <a href="decoding__encoding_8c_source.html#l00045">decoding_encoding.c:45</a></div></div>
<div class="ttc" id="structAVCodecContext_html_aeb08c575a79eb84fc4155dda88f46c06"><div class="ttname"><a href="structAVCodecContext.html#aeb08c575a79eb84fc4155dda88f46c06">AVCodecContext::channel_layout</a></div><div class="ttdeci">uint64_t channel_layout</div><div class="ttdoc">Audio channel layout. </div><div class="ttdef"><b>Definition:</b> <a href="avcodec_8h_source.html#l02338">avcodec.h:2338</a></div></div>
<div class="ttc" id="structAVFrame_html_a5f343e0325e3e9d9ed20e34c9e156aef"><div class="ttname"><a href="structAVFrame.html#a5f343e0325e3e9d9ed20e34c9e156aef">AVFrame::channel_layout</a></div><div class="ttdeci">uint64_t channel_layout</div><div class="ttdoc">Channel layout of the audio data. </div><div class="ttdef"><b>Definition:</b> <a href="frame_8h_source.html#l00343">frame.h:343</a></div></div>
<div class="ttc" id="channel__layout_8h_html"><div class="ttname"><a href="channel__layout_8h.html">channel_layout.h</a></div><div class="ttdoc">audio channel layout utility functions </div></div>
<div class="ttc" id="group__lavc__core_html_gae80afec6f26df6607eaacf39b561c315"><div class="ttname"><a href="group__lavc__core.html#gae80afec6f26df6607eaacf39b561c315">avcodec_alloc_context3</a></div><div class="ttdeci">AVCodecContext * avcodec_alloc_context3(const AVCodec *codec)</div><div class="ttdoc">Allocate an AVCodecContext and set its fields to default values. </div></div>
<div class="ttc" id="structAVCodecContext_html_a0d8f46461754e8abea0847dcbc41b956"><div class="ttname"><a href="structAVCodecContext.html#a0d8f46461754e8abea0847dcbc41b956">AVCodecContext::width</a></div><div class="ttdeci">int width</div><div class="ttdoc">picture width / height. </div><div class="ttdef"><b>Definition:</b> <a href="avcodec_8h_source.html#l01711">avcodec.h:1711</a></div></div>
<div class="ttc" id="decoding__encoding_8c_html_a67ded2b27004b72c27d4f3500a578ff6"><div class="ttname"><a href="decoding__encoding_8c.html#a67ded2b27004b72c27d4f3500a578ff6">audio_encode_example</a></div><div class="ttdeci">static void audio_encode_example(const char *filename)</div><div class="ttdef"><b>Definition:</b> <a href="decoding__encoding_8c_source.html#l00103">decoding_encoding.c:103</a></div></div>
<div class="ttc" id="group__lavc__decoding_html_ga834bb1b062fbcc2de4cf7fb93f154a3e"><div class="ttname"><a href="group__lavc__decoding.html#ga834bb1b062fbcc2de4cf7fb93f154a3e">avcodec_decode_audio4</a></div><div class="ttdeci">int avcodec_decode_audio4(AVCodecContext *avctx, AVFrame *frame, int *got_frame_ptr, const AVPacket *avpkt)</div><div class="ttdoc">Decode the audio frame of size avpkt->size from avpkt->data into frame. </div></div>
<div class="ttc" id="structAVCodecContext_html_a0449afd803eb107bd4dbc8b5ea22e363"><div class="ttname"><a href="structAVCodecContext.html#a0449afd803eb107bd4dbc8b5ea22e363">AVCodecContext::height</a></div><div class="ttdeci">int height</div><div class="ttdef"><b>Definition:</b> <a href="avcodec_8h_source.html#l01711">avcodec.h:1711</a></div></div>
<div class="ttc" id="decoding__encoding_8c_html_a7293f14f6e6315d54331137ae883079f"><div class="ttname"><a href="decoding__encoding_8c.html#a7293f14f6e6315d54331137ae883079f">video_encode_example</a></div><div class="ttdeci">static void video_encode_example(const char *filename, int codec_id)</div><div class="ttdef"><b>Definition:</b> <a href="decoding__encoding_8c_source.html#l00347">decoding_encoding.c:347</a></div></div>
<div class="ttc" id="structAVFrame_html_aed14fa772ce46881020fd1545c86432c"><div class="ttname"><a href="structAVFrame.html#aed14fa772ce46881020fd1545c86432c">AVFrame::format</a></div><div class="ttdeci">int format</div><div class="ttdoc">format of the frame, -1 if unknown or unset Values correspond to enum AVPixelFormat for video frames...</div><div class="ttdef"><b>Definition:</b> <a href="frame_8h_source.html#l00242">frame.h:242</a></div></div>
<div class="ttc" id="structAVCodecContext_html_aec57f0d859a6df8b479cd93ca3a44a33"><div class="ttname"><a href="structAVCodecContext.html#aec57f0d859a6df8b479cd93ca3a44a33">AVCodecContext::frame_size</a></div><div class="ttdeci">int frame_size</div><div class="ttdoc">Number of samples per channel in an audio frame. </div><div class="ttdef"><b>Definition:</b> <a href="avcodec_8h_source.html#l02307">avcodec.h:2307</a></div></div>
<div class="ttc" id="decoding__encoding_8c_html_a1d01e17e5817622d9419f681603f6c8f"><div class="ttname"><a href="decoding__encoding_8c.html#a1d01e17e5817622d9419f681603f6c8f">decode_write_frame</a></div><div class="ttdeci">static int decode_write_frame(const char *outfilename, AVCodecContext *avctx, AVFrame *frame, int *frame_count, AVPacket *pkt, int last)</div><div class="ttdef"><b>Definition:</b> <a href="decoding__encoding_8c_source.html#l00506">decoding_encoding.c:506</a></div></div>
<div class="ttc" id="avcodec_8h_html"><div class="ttname"><a href="avcodec_8h.html">avcodec.h</a></div><div class="ttdoc">Libavcodec external API header. </div></div>
<div class="ttc" id="group__lavu__sampfmts_html_gaf9a51ca15301871723577c730b5865c5"><div class="ttname"><a href="group__lavu__sampfmts.html#gaf9a51ca15301871723577c730b5865c5">AVSampleFormat</a></div><div class="ttdeci">AVSampleFormat</div><div class="ttdoc">Audio sample formats. </div><div class="ttdef"><b>Definition:</b> <a href="samplefmt_8h_source.html#l00059">samplefmt.h:59</a></div></div>
<div class="ttc" id="decoding__encoding_8c_html_a3c04138a5bfe5d72780bb7e82a18e627"><div class="ttname"><a href="decoding__encoding_8c.html#a3c04138a5bfe5d72780bb7e82a18e627">main</a></div><div class="ttdeci">int main(int argc, char **argv)</div><div class="ttdef"><b>Definition:</b> <a href="decoding__encoding_8c_source.html#l00631">decoding_encoding.c:631</a></div></div>
<div class="ttc" id="structAVCodecContext_html_a8ff0b000c463361e234af48d03aadfc0"><div class="ttname"><a href="structAVCodecContext.html#a8ff0b000c463361e234af48d03aadfc0">AVCodecContext::sample_rate</a></div><div class="ttdeci">int sample_rate</div><div class="ttdoc">samples per second </div><div class="ttdef"><b>Definition:</b> <a href="avcodec_8h_source.html#l02287">avcodec.h:2287</a></div></div>
<div class="ttc" id="structAVFrame_html_aa52bfc6605f6a3059a0c3226cc0f6567"><div class="ttname"><a href="structAVFrame.html#aa52bfc6605f6a3059a0c3226cc0f6567">AVFrame::linesize</a></div><div class="ttdeci">int linesize[AV_NUM_DATA_POINTERS]</div><div class="ttdoc">For video, size in bytes of each picture line. </div><div class="ttdef"><b>Definition:</b> <a href="frame_8h_source.html#l00209">frame.h:209</a></div></div>
<div class="ttc" id="structAVCodecContext_html"><div class="ttname"><a href="structAVCodecContext.html">AVCodecContext</a></div><div class="ttdoc">main external API structure. </div><div class="ttdef"><b>Definition:</b> <a href="avcodec_8h_source.html#l01532">avcodec.h:1532</a></div></div>
<div class="ttc" id="group__lavc__decoding_html_ga19a0ca553277f019dd5b0fec6e1f9dca"><div class="ttname"><a href="group__lavc__decoding.html#ga19a0ca553277f019dd5b0fec6e1f9dca">avcodec_find_decoder</a></div><div class="ttdeci">AVCodec * avcodec_find_decoder(enum AVCodecID id)</div><div class="ttdoc">Find a registered decoder with a matching codec ID. </div></div>
<div class="ttc" id="group__lavc__packet_html_ga63d5a489b419bd5d45cfd09091cbcbc2"><div class="ttname"><a href="group__lavc__packet.html#ga63d5a489b419bd5d45cfd09091cbcbc2">av_packet_unref</a></div><div class="ttdeci">void av_packet_unref(AVPacket *pkt)</div><div class="ttdoc">Wipe the packet. </div></div>
<div class="ttc" id="group__lavu__sampfmts_html_gaa7368bc4e3a366b688e81938ed55eb06"><div class="ttname"><a href="group__lavu__sampfmts.html#gaa7368bc4e3a366b688e81938ed55eb06">av_samples_get_buffer_size</a></div><div class="ttdeci">int av_samples_get_buffer_size(int *linesize, int nb_channels, int nb_samples, enum AVSampleFormat sample_fmt, int align)</div><div class="ttdoc">Get the required buffer size for the given audio parameters. </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="decoding__encoding_8c_html_a5cbf8bd3441619622d3956d623d944b3"><div class="ttname"><a href="decoding__encoding_8c.html#a5cbf8bd3441619622d3956d623d944b3">audio_decode_example</a></div><div class="ttdeci">static void audio_decode_example(const char *outfilename, const char *filename)</div><div class="ttdef"><b>Definition:</b> <a href="decoding__encoding_8c_source.html#l00242">decoding_encoding.c:242</a></div></div>
<div class="ttc" id="group__lavc__core_html_ga11f785a188d7d9df71621001465b0f1d"><div class="ttname"><a href="group__lavc__core.html#ga11f785a188d7d9df71621001465b0f1d">avcodec_open2</a></div><div class="ttdeci">int avcodec_open2(AVCodecContext *avctx, const AVCodec *codec, AVDictionary **options)</div><div class="ttdoc">Initialize the AVCodecContext to use the given AVCodec. </div></div>
<div class="ttc" id="group__lavc__core_html_ggaadca229ad2c20e060a14fec08a5cc7cea90ffce5aedda33269b22221916cd8487"><div class="ttname"><a href="group__lavc__core.html#ggaadca229ad2c20e060a14fec08a5cc7cea90ffce5aedda33269b22221916cd8487">AV_CODEC_ID_MP2</a></div><div class="ttdef"><b>Definition:</b> <a href="avcodec_8h_source.html#l00419">avcodec.h:419</a></div></div>
<div class="ttc" id="group__lavc__core_html_ga239656738c46ed6e3cde210a9390433a"><div class="ttname"><a href="group__lavc__core.html#ga239656738c46ed6e3cde210a9390433a">AV_CODEC_CAP_TRUNCATED</a></div><div class="ttdeci">#define AV_CODEC_CAP_TRUNCATED</div><div class="ttdef"><b>Definition:</b> <a href="avcodec_8h_source.html#l00857">avcodec.h:857</a></div></div>
<div class="ttc" id="structAVFrame_html_a1d0f65014a8d1bf78cec8cbed2304992"><div class="ttname"><a href="structAVFrame.html#a1d0f65014a8d1bf78cec8cbed2304992">AVFrame::data</a></div><div class="ttdeci">uint8_t * data[AV_NUM_DATA_POINTERS]</div><div class="ttdoc">pointer to the picture/channel planes. </div><div class="ttdef"><b>Definition:</b> <a href="frame_8h_source.html#l00192">frame.h:192</a></div></div>
<div class="ttc" id="group__lavu__sampfmts_html_ga0c3c218e1dd570ad4917c69a35a6c77d"><div class="ttname"><a href="group__lavu__sampfmts.html#ga0c3c218e1dd570ad4917c69a35a6c77d">av_get_bytes_per_sample</a></div><div class="ttdeci">int av_get_bytes_per_sample(enum AVSampleFormat sample_fmt)</div><div class="ttdoc">Return number of bytes per sample. </div></div>
<div class="ttc" id="structAVCodecContext_html_a9b6b3f1fcbdcc2ad9f4dbb4370496e38"><div class="ttname"><a href="structAVCodecContext.html#a9b6b3f1fcbdcc2ad9f4dbb4370496e38">AVCodecContext::gop_size</a></div><div class="ttdeci">int gop_size</div><div class="ttdoc">the number of pictures in a group of pictures, or 0 for intra_only </div><div class="ttdef"><b>Definition:</b> <a href="avcodec_8h_source.html#l01737">avcodec.h:1737</a></div></div>
<div class="ttc" id="pixfmt_8h_html_a9a8e335cf3be472042bc9f0cf80cd4c5a1aa7677092740d8def31655b5d7f0cc2"><div class="ttname"><a href="pixfmt_8h.html#a9a8e335cf3be472042bc9f0cf80cd4c5a1aa7677092740d8def31655b5d7f0cc2">AV_PIX_FMT_YUV420P</a></div><div class="ttdoc">planar YUV 4:2:0, 12bpp, (1 Cr & Cb sample per 2x2 Y samples) </div><div class="ttdef"><b>Definition:</b> <a href="pixfmt_8h_source.html#l00063">pixfmt.h:63</a></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="group__lavu__sampfmts_html_ggaf9a51ca15301871723577c730b5865c5aea6132df57aebc3f76e10665395c46af"><div class="ttname"><a href="group__lavu__sampfmts.html#ggaf9a51ca15301871723577c730b5865c5aea6132df57aebc3f76e10665395c46af">AV_SAMPLE_FMT_S16</a></div><div class="ttdoc">signed 16 bits </div><div class="ttdef"><b>Definition:</b> <a href="samplefmt_8h_source.html#l00062">samplefmt.h:62</a></div></div>
<div class="ttc" id="group__lavc__packet_html_gac9cb9756175b96e7441575803757fb73"><div class="ttname"><a href="group__lavc__packet.html#gac9cb9756175b96e7441575803757fb73">av_init_packet</a></div><div class="ttdeci">void av_init_packet(AVPacket *pkt)</div><div class="ttdoc">Initialize optional fields of a packet with default values. </div></div>
<div class="ttc" id="decoding__encoding_8c_html_a6378f14810330164b7fb66f3334b2a27"><div class="ttname"><a href="decoding__encoding_8c.html#a6378f14810330164b7fb66f3334b2a27">INBUF_SIZE</a></div><div class="ttdeci">#define INBUF_SIZE</div><div class="ttdef"><b>Definition:</b> <a href="decoding__encoding_8c_source.html#l00043">decoding_encoding.c:43</a></div></div>
<div class="ttc" id="group__lavc__decoding_html_ga8f5b632a03ce83ac8e025894b1fc307a"><div class="ttname"><a href="group__lavc__decoding.html#ga8f5b632a03ce83ac8e025894b1fc307a">AV_INPUT_BUFFER_PADDING_SIZE</a></div><div class="ttdeci">#define AV_INPUT_BUFFER_PADDING_SIZE</div><div class="ttdoc">Required number of additionally allocated bytes at the end of the input bitstream for decoding...</div><div class="ttdef"><b>Definition:</b> <a href="avcodec_8h_source.html#l00635">avcodec.h:635</a></div></div>
<div class="ttc" id="structAVCodecContext_html_af3379123060ad8cc9c321c29af4f8360"><div class="ttname"><a href="structAVCodecContext.html#af3379123060ad8cc9c321c29af4f8360">AVCodecContext::priv_data</a></div><div class="ttdeci">void * priv_data</div><div class="ttdef"><b>Definition:</b> <a href="avcodec_8h_source.html#l01574">avcodec.h:1574</a></div></div>
<div class="ttc" id="structAVCodecContext_html_ac1e6c2cd1269caa7570575725c682a49"><div class="ttname"><a href="structAVCodecContext.html#ac1e6c2cd1269caa7570575725c682a49">AVCodecContext::channels</a></div><div class="ttdeci">int channels</div><div class="ttdoc">number of audio channels </div><div class="ttdef"><b>Definition:</b> <a href="avcodec_8h_source.html#l02288">avcodec.h:2288</a></div></div>
<div class="ttc" id="decoding__encoding_8c_html_ae6bb0fc8f05c78c13e9d38605038d994"><div class="ttname"><a href="decoding__encoding_8c.html#ae6bb0fc8f05c78c13e9d38605038d994">select_channel_layout</a></div><div class="ttdeci">static int select_channel_layout(AVCodec *codec)</div><div class="ttdef"><b>Definition:</b> <a href="decoding__encoding_8c_source.html#l00078">decoding_encoding.c:78</a></div></div>
<div class="ttc" id="structAVCodec_html_aee7a194f1c3251958d3dabed3fa8148e"><div class="ttname"><a href="structAVCodec.html#aee7a194f1c3251958d3dabed3fa8148e">AVCodec::supported_samplerates</a></div><div class="ttdeci">const int * supported_samplerates</div><div class="ttdoc">array of supported audio samplerates, or NULL if unknown, array is terminated by 0 ...</div><div class="ttdef"><b>Definition:</b> <a href="avcodec_8h_source.html#l03414">avcodec.h:3414</a></div></div>
<div class="ttc" id="decoding__encoding_8c_html_a3a513b5612784dd20c0dfbdf456abd01"><div class="ttname"><a href="decoding__encoding_8c.html#a3a513b5612784dd20c0dfbdf456abd01">AUDIO_INBUF_SIZE</a></div><div class="ttdeci">#define AUDIO_INBUF_SIZE</div><div class="ttdef"><b>Definition:</b> <a href="decoding__encoding_8c_source.html#l00044">decoding_encoding.c:44</a></div></div>
<div class="ttc" id="structAVPacket_html_a85dbbd306b44b02390cd91c45e6a0f76"><div class="ttname"><a href="structAVPacket.html#a85dbbd306b44b02390cd91c45e6a0f76">AVPacket::dts</a></div><div class="ttdeci">int64_t dts</div><div class="ttdoc">Decompression timestamp in AVStream->time_base units; the time at which the packet is decompressed...</div><div class="ttdef"><b>Definition:</b> <a href="avcodec_8h_source.html#l01466">avcodec.h:1466</a></div></div>
<div class="ttc" id="group__lavc__core_html_ga74131d472b00ef60d8632702bfec0984"><div class="ttname"><a href="group__lavc__core.html#ga74131d472b00ef60d8632702bfec0984">AV_CODEC_FLAG_TRUNCATED</a></div><div class="ttdeci">#define AV_CODEC_FLAG_TRUNCATED</div><div class="ttdoc">Input bitstream might be truncated at a random location instead of only at frame boundaries. </div><div class="ttdef"><b>Definition:</b> <a href="avcodec_8h_source.html#l00771">avcodec.h:771</a></div></div>
<div class="ttc" id="structAVFrame_html_a3f89733f429c98ba5bc64373fb0a3f13"><div class="ttname"><a href="structAVFrame.html#a3f89733f429c98ba5bc64373fb0a3f13">AVFrame::height</a></div><div class="ttdeci">int height</div><div class="ttdef"><b>Definition:</b> <a href="frame_8h_source.html#l00230">frame.h:230</a></div></div>
<div class="ttc" id="mathematics_8h_html_ae71449b1cc6e6250b91f539153a7a0d3"><div class="ttname"><a href="mathematics_8h.html#ae71449b1cc6e6250b91f539153a7a0d3">M_PI</a></div><div class="ttdeci">#define M_PI</div><div class="ttdef"><b>Definition:</b> <a href="mathematics_8h_source.html#l00046">mathematics.h:46</a></div></div>
<div class="ttc" id="structAVCodec_html_aac19f4c45370f715412ad5c7b78daacf"><div class="ttname"><a href="structAVCodec.html#aac19f4c45370f715412ad5c7b78daacf">AVCodec::sample_fmts</a></div><div class="ttdeci">enum AVSampleFormat * sample_fmts</div><div class="ttdoc">array of supported sample formats, or NULL if unknown, array is terminated by -1 </div><div class="ttdef"><b>Definition:</b> <a href="avcodec_8h_source.html#l03415">avcodec.h:3415</a></div></div>
<div class="ttc" id="structAVPacket_html"><div class="ttname"><a href="structAVPacket.html">AVPacket</a></div><div class="ttdoc">This structure stores compressed data. </div><div class="ttdef"><b>Definition:</b> <a href="avcodec_8h_source.html#l01444">avcodec.h:1444</a></div></div>
<div class="ttc" id="group__opt__set__funcs_html_ga5fd4b92bdf4f392a2847f711676a7537"><div class="ttname"><a href="group__opt__set__funcs.html#ga5fd4b92bdf4f392a2847f711676a7537">av_opt_set</a></div><div class="ttdeci">int av_opt_set(void *obj, const char *name, const char *val, int search_flags)</div></div>
<div class="ttc" id="structAVFrame_html_a02f45ab8191aea1660159f1e464237ea"><div class="ttname"><a href="structAVFrame.html#a02f45ab8191aea1660159f1e464237ea">AVFrame::nb_samples</a></div><div class="ttdeci">int nb_samples</div><div class="ttdoc">number of audio samples (per channel) described by this frame </div><div class="ttdef"><b>Definition:</b> <a href="frame_8h_source.html#l00235">frame.h:235</a></div></div>
<div class="ttc" id="structAVPacket_html_a73bde0a37f3b1efc839f11295bfbf42a"><div class="ttname"><a href="structAVPacket.html#a73bde0a37f3b1efc839f11295bfbf42a">AVPacket::pts</a></div><div class="ttdeci">int64_t pts</div><div class="ttdoc">Presentation timestamp in AVStream->time_base units; the time at which the decompressed packet will b...</div><div class="ttdef"><b>Definition:</b> <a href="avcodec_8h_source.html#l01460">avcodec.h:1460</a></div></div>
<div class="ttc" id="group__lavu__time_html_ga2eaefe702f95f619ea6f2d08afa01be1"><div class="ttname"><a href="group__lavu__time.html#ga2eaefe702f95f619ea6f2d08afa01be1">AV_NOPTS_VALUE</a></div><div class="ttdeci">#define AV_NOPTS_VALUE</div><div class="ttdoc">Undefined timestamp value. </div><div class="ttdef"><b>Definition:</b> <a href="avutil_8h_source.html#l00240">avutil.h:240</a></div></div>
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