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<div class="title">transcode_aac.c</div> </div>
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<a href="transcode__aac_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"> * This file is part of FFmpeg.</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"> * FFmpeg is free software; you can redistribute it and/or</span></div>
<div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment"> * modify it under the terms of the GNU Lesser General Public</span></div>
<div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment"> * License as published by the Free Software Foundation; either</span></div>
<div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment"> * version 2.1 of the License, or (at your option) any later version.</span></div>
<div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment"> * FFmpeg is distributed in the hope that it will be useful,</span></div>
<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment"> * but WITHOUT ANY WARRANTY; without even the implied warranty of</span></div>
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment"> * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU</span></div>
<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment"> * Lesser General Public License for more details.</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"> * You should have received a copy of the GNU Lesser General Public</span></div>
<div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="comment"> * License along with FFmpeg; if not, write to the Free Software</span></div>
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="comment"> * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA</span></div>
<div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="comment"></span></div>
<div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="comment"> * @file</span></div>
<div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="comment"> * simple audio converter</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"> * @example transcode_aac.c</span></div>
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="comment"> * Convert an input audio file to AAC in an MP4 container using FFmpeg.</span></div>
<div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="comment"> * @author Andreas Unterweger (dustsigns@gmail.com)</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> </div>
<div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="preprocessor">#include <stdio.h></span></div>
<div class="line"><a name="l00029"></a><span class="lineno"> 29</span> </div>
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="preprocessor">#include "<a class="code" href="avformat_8h.html">libavformat/avformat.h</a>"</span></div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="preprocessor">#include "<a class="code" href="avio_8h.html">libavformat/avio.h</a>"</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 "<a class="code" href="avcodec_8h.html">libavcodec/avcodec.h</a>"</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="audio__fifo_8h.html">libavutil/audio_fifo.h</a>"</span></div>
<div class="line"><a name="l00036"></a><span class="lineno"> 36</span> <span class="preprocessor">#include "<a class="code" href="avassert_8h.html">libavutil/avassert.h</a>"</span></div>
<div class="line"><a name="l00037"></a><span class="lineno"> 37</span> <span class="preprocessor">#include "<a class="code" href="avstring_8h.html">libavutil/avstring.h</a>"</span></div>
<div class="line"><a name="l00038"></a><span class="lineno"> 38</span> <span class="preprocessor">#include "<a class="code" href="frame_8h.html">libavutil/frame.h</a>"</span></div>
<div class="line"><a name="l00039"></a><span class="lineno"> 39</span> <span class="preprocessor">#include "<a class="code" href="opt_8h.html">libavutil/opt.h</a>"</span></div>
<div class="line"><a name="l00040"></a><span class="lineno"> 40</span> </div>
<div class="line"><a name="l00041"></a><span class="lineno"> 41</span> <span class="preprocessor">#include "<a class="code" href="swresample_8h.html">libswresample/swresample.h</a>"</span></div>
<div class="line"><a name="l00042"></a><span class="lineno"> 42</span> <span class="comment"></span></div>
<div class="line"><a name="l00043"></a><span class="lineno"> 43</span> <span class="comment">/** The output bit rate in kbit/s */</span></div>
<div class="line"><a name="l00044"></a><span class="lineno"><a class="line" href="transcode__aac_8c.html#a40d898a8dbfccabcbbff15a29924e97f"> 44</a></span> <span class="preprocessor">#define OUTPUT_BIT_RATE 96000</span></div>
<div class="line"><a name="l00045"></a><span class="lineno"> 45</span> <span class="preprocessor"></span><span class="comment">/** The number of output channels */</span></div>
<div class="line"><a name="l00046"></a><span class="lineno"><a class="line" href="transcode__aac_8c.html#a4d4855d9b709af9628540e41e5ebb925"> 46</a></span> <span class="preprocessor">#define OUTPUT_CHANNELS 2</span></div>
<div class="line"><a name="l00047"></a><span class="lineno"> 47</span> <span class="preprocessor"></span><span class="comment"></span></div>
<div class="line"><a name="l00048"></a><span class="lineno"> 48</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00049"></a><span class="lineno"> 49</span> <span class="comment"> * Convert an error code into a text message.</span></div>
<div class="line"><a name="l00050"></a><span class="lineno"> 50</span> <span class="comment"> * @param error Error code to be converted</span></div>
<div class="line"><a name="l00051"></a><span class="lineno"> 51</span> <span class="comment"> * @return Corresponding error text (not thread-safe)</span></div>
<div class="line"><a name="l00052"></a><span class="lineno"> 52</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00053"></a><span class="lineno"><a class="line" href="transcode__aac_8c.html#adc7cf4c70d2850aecf8c9997a350147c"> 53</a></span> <span class="keyword">static</span> <span class="keyword">const</span> <span class="keywordtype">char</span> *<a class="code" href="transcode__aac_8c.html#adc7cf4c70d2850aecf8c9997a350147c">get_error_text</a>(<span class="keyword">const</span> <span class="keywordtype">int</span> error)</div>
<div class="line"><a name="l00054"></a><span class="lineno"> 54</span> {</div>
<div class="line"><a name="l00055"></a><span class="lineno"> 55</span>  <span class="keyword">static</span> <span class="keywordtype">char</span> error_buffer[255];</div>
<div class="line"><a name="l00056"></a><span class="lineno"> 56</span>  <a class="code" href="group__lavu__error.html#ga5792b4a2d18d7d9cb0efbcfc335dce24">av_strerror</a>(error, error_buffer, <span class="keyword">sizeof</span>(error_buffer));</div>
<div class="line"><a name="l00057"></a><span class="lineno"> 57</span>  <span class="keywordflow">return</span> error_buffer;</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> <span class="comment"></span></div>
<div class="line"><a name="l00060"></a><span class="lineno"> 60</span> <span class="comment">/** Open an input file and the required decoder. */</span></div>
<div class="line"><a name="l00061"></a><span class="lineno"><a class="line" href="transcode__aac_8c.html#a8103e36bb4cb4141ee5e25acc350bc0b"> 61</a></span> <span class="keyword">static</span> <span class="keywordtype">int</span> <a class="code" href="transcode__aac_8c.html#a8103e36bb4cb4141ee5e25acc350bc0b">open_input_file</a>(<span class="keyword">const</span> <span class="keywordtype">char</span> *filename,</div>
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span>  <a class="code" href="structAVFormatContext.html">AVFormatContext</a> **input_format_context,</div>
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span>  <a class="code" href="structAVCodecContext.html">AVCodecContext</a> **input_codec_context)</div>
<div class="line"><a name="l00064"></a><span class="lineno"> 64</span> {</div>
<div class="line"><a name="l00065"></a><span class="lineno"> 65</span>  <a class="code" href="structAVCodec.html">AVCodec</a> *input_codec;</div>
<div class="line"><a name="l00066"></a><span class="lineno"> 66</span>  <span class="keywordtype">int</span> error;</div>
<div class="line"><a name="l00067"></a><span class="lineno"> 67</span> <span class="comment"></span></div>
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span> <span class="comment"> /** Open the input file to read from it. */</span></div>
<div class="line"><a name="l00069"></a><span class="lineno"> 69</span>  <span class="keywordflow">if</span> ((error = <a class="code" href="group__lavf__decoding.html#ga31d601155e9035d5b0e7efedc894ee49">avformat_open_input</a>(input_format_context, filename, NULL,</div>
<div class="line"><a name="l00070"></a><span class="lineno"> 70</span>  NULL)) < 0) {</div>
<div class="line"><a name="l00071"></a><span class="lineno"> 71</span>  fprintf(stderr, <span class="stringliteral">"Could not open input file '%s' (error '%s')\n"</span>,</div>
<div class="line"><a name="l00072"></a><span class="lineno"> 72</span>  filename, <a class="code" href="transcode__aac_8c.html#adc7cf4c70d2850aecf8c9997a350147c">get_error_text</a>(error));</div>
<div class="line"><a name="l00073"></a><span class="lineno"> 73</span>  *input_format_context = NULL;</div>
<div class="line"><a name="l00074"></a><span class="lineno"> 74</span>  <span class="keywordflow">return</span> error;</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> <span class="comment"></span></div>
<div class="line"><a name="l00077"></a><span class="lineno"> 77</span> <span class="comment"> /** Get information on the input file (number of streams etc.). */</span></div>
<div class="line"><a name="l00078"></a><span class="lineno"> 78</span>  <span class="keywordflow">if</span> ((error = <a class="code" href="group__lavf__decoding.html#gad42172e27cddafb81096939783b157bb">avformat_find_stream_info</a>(*input_format_context, NULL)) < 0) {</div>
<div class="line"><a name="l00079"></a><span class="lineno"> 79</span>  fprintf(stderr, <span class="stringliteral">"Could not open find stream info (error '%s')\n"</span>,</div>
<div class="line"><a name="l00080"></a><span class="lineno"> 80</span>  <a class="code" href="transcode__aac_8c.html#adc7cf4c70d2850aecf8c9997a350147c">get_error_text</a>(error));</div>
<div class="line"><a name="l00081"></a><span class="lineno"> 81</span>  <a class="code" href="group__lavf__decoding.html#gae804b99aec044690162b8b9b110236a4">avformat_close_input</a>(input_format_context);</div>
<div class="line"><a name="l00082"></a><span class="lineno"> 82</span>  <span class="keywordflow">return</span> error;</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="comment"></span></div>
<div class="line"><a name="l00085"></a><span class="lineno"> 85</span> <span class="comment"> /** Make sure that there is only one stream in the input file. */</span></div>
<div class="line"><a name="l00086"></a><span class="lineno"> 86</span>  <span class="keywordflow">if</span> ((*input_format_context)->nb_streams != 1) {</div>
<div class="line"><a name="l00087"></a><span class="lineno"> 87</span>  fprintf(stderr, <span class="stringliteral">"Expected one audio input stream, but found %d\n"</span>,</div>
<div class="line"><a name="l00088"></a><span class="lineno"> 88</span>  (*input_format_context)->nb_streams);</div>
<div class="line"><a name="l00089"></a><span class="lineno"> 89</span>  <a class="code" href="group__lavf__decoding.html#gae804b99aec044690162b8b9b110236a4">avformat_close_input</a>(input_format_context);</div>
<div class="line"><a name="l00090"></a><span class="lineno"> 90</span>  <span class="keywordflow">return</span> <a class="code" href="group__lavu__error.html#ga334ea23fd9e492cd0e718330f2353b6b">AVERROR_EXIT</a>;</div>
<div class="line"><a name="l00091"></a><span class="lineno"> 91</span>  }</div>
<div class="line"><a name="l00092"></a><span class="lineno"> 92</span> <span class="comment"></span></div>
<div class="line"><a name="l00093"></a><span class="lineno"> 93</span> <span class="comment"> /** Find a decoder for the audio stream. */</span></div>
<div class="line"><a name="l00094"></a><span class="lineno"> 94</span>  <span class="keywordflow">if</span> (!(input_codec = <a class="code" href="group__lavc__decoding.html#ga19a0ca553277f019dd5b0fec6e1f9dca">avcodec_find_decoder</a>((*input_format_context)->streams[0]->codec->codec_id))) {</div>
<div class="line"><a name="l00095"></a><span class="lineno"> 95</span>  fprintf(stderr, <span class="stringliteral">"Could not find input codec\n"</span>);</div>
<div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  <a class="code" href="group__lavf__decoding.html#gae804b99aec044690162b8b9b110236a4">avformat_close_input</a>(input_format_context);</div>
<div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  <span class="keywordflow">return</span> <a class="code" href="group__lavu__error.html#ga334ea23fd9e492cd0e718330f2353b6b">AVERROR_EXIT</a>;</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> <span class="comment"></span></div>
<div class="line"><a name="l00100"></a><span class="lineno"> 100</span> <span class="comment"> /** Open the decoder for the audio stream to use it later. */</span></div>
<div class="line"><a name="l00101"></a><span class="lineno"> 101</span>  <span class="keywordflow">if</span> ((error = <a class="code" href="group__lavc__core.html#ga11f785a188d7d9df71621001465b0f1d">avcodec_open2</a>((*input_format_context)->streams[0]->codec,</div>
<div class="line"><a name="l00102"></a><span class="lineno"> 102</span>  input_codec, NULL)) < 0) {</div>
<div class="line"><a name="l00103"></a><span class="lineno"> 103</span>  fprintf(stderr, <span class="stringliteral">"Could not open input codec (error '%s')\n"</span>,</div>
<div class="line"><a name="l00104"></a><span class="lineno"> 104</span>  <a class="code" href="transcode__aac_8c.html#adc7cf4c70d2850aecf8c9997a350147c">get_error_text</a>(error));</div>
<div class="line"><a name="l00105"></a><span class="lineno"> 105</span>  <a class="code" href="group__lavf__decoding.html#gae804b99aec044690162b8b9b110236a4">avformat_close_input</a>(input_format_context);</div>
<div class="line"><a name="l00106"></a><span class="lineno"> 106</span>  <span class="keywordflow">return</span> error;</div>
<div class="line"><a name="l00107"></a><span class="lineno"> 107</span>  }</div>
<div class="line"><a name="l00108"></a><span class="lineno"> 108</span> <span class="comment"></span></div>
<div class="line"><a name="l00109"></a><span class="lineno"> 109</span> <span class="comment"> /** Save the decoder context for easier access later. */</span></div>
<div class="line"><a name="l00110"></a><span class="lineno"> 110</span>  *input_codec_context = (*input_format_context)->streams[0]-><a class="code" href="structAVCodecContext.html#a6e606effa68724cae2ef5cc05f7fd9cb">codec</a>;</div>
<div class="line"><a name="l00111"></a><span class="lineno"> 111</span> </div>
<div class="line"><a name="l00112"></a><span class="lineno"> 112</span>  <span class="keywordflow">return</span> 0;</div>
<div class="line"><a name="l00113"></a><span class="lineno"> 113</span> }</div>
<div class="line"><a name="l00114"></a><span class="lineno"> 114</span> <span class="comment"></span></div>
<div class="line"><a name="l00115"></a><span class="lineno"> 115</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00116"></a><span class="lineno"> 116</span> <span class="comment"> * Open an output file and the required encoder.</span></div>
<div class="line"><a name="l00117"></a><span class="lineno"> 117</span> <span class="comment"> * Also set some basic encoder parameters.</span></div>
<div class="line"><a name="l00118"></a><span class="lineno"> 118</span> <span class="comment"> * Some of these parameters are based on the input file's parameters.</span></div>
<div class="line"><a name="l00119"></a><span class="lineno"> 119</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00120"></a><span class="lineno"><a class="line" href="transcode__aac_8c.html#a617f4760254c119fc7caa222f3fcbd21"> 120</a></span> <span class="keyword">static</span> <span class="keywordtype">int</span> <a class="code" href="transcode__aac_8c.html#a617f4760254c119fc7caa222f3fcbd21">open_output_file</a>(<span class="keyword">const</span> <span class="keywordtype">char</span> *filename,</div>
<div class="line"><a name="l00121"></a><span class="lineno"> 121</span>  <a class="code" href="structAVCodecContext.html">AVCodecContext</a> *input_codec_context,</div>
<div class="line"><a name="l00122"></a><span class="lineno"> 122</span>  <a class="code" href="structAVFormatContext.html">AVFormatContext</a> **output_format_context,</div>
<div class="line"><a name="l00123"></a><span class="lineno"> 123</span>  <a class="code" href="structAVCodecContext.html">AVCodecContext</a> **output_codec_context)</div>
<div class="line"><a name="l00124"></a><span class="lineno"> 124</span> {</div>
<div class="line"><a name="l00125"></a><span class="lineno"> 125</span>  <a class="code" href="structAVIOContext.html">AVIOContext</a> *output_io_context = NULL;</div>
<div class="line"><a name="l00126"></a><span class="lineno"> 126</span>  <a class="code" href="structAVStream.html">AVStream</a> *stream = NULL;</div>
<div class="line"><a name="l00127"></a><span class="lineno"> 127</span>  <a class="code" href="structAVCodec.html">AVCodec</a> *output_codec = NULL;</div>
<div class="line"><a name="l00128"></a><span class="lineno"> 128</span>  <span class="keywordtype">int</span> error;</div>
<div class="line"><a name="l00129"></a><span class="lineno"> 129</span> <span class="comment"></span></div>
<div class="line"><a name="l00130"></a><span class="lineno"> 130</span> <span class="comment"> /** Open the output file to write to it. */</span></div>
<div class="line"><a name="l00131"></a><span class="lineno"> 131</span>  <span class="keywordflow">if</span> ((error = <a class="code" href="avio_8h.html#a371a670112abc5f3e15bc570da076301">avio_open</a>(&output_io_context, filename,</div>
<div class="line"><a name="l00132"></a><span class="lineno"> 132</span>  <a class="code" href="avio_8h.html#a5c9308f296545a8f3b7687d277a6dabc">AVIO_FLAG_WRITE</a>)) < 0) {</div>
<div class="line"><a name="l00133"></a><span class="lineno"> 133</span>  fprintf(stderr, <span class="stringliteral">"Could not open output file '%s' (error '%s')\n"</span>,</div>
<div class="line"><a name="l00134"></a><span class="lineno"> 134</span>  filename, <a class="code" href="transcode__aac_8c.html#adc7cf4c70d2850aecf8c9997a350147c">get_error_text</a>(error));</div>
<div class="line"><a name="l00135"></a><span class="lineno"> 135</span>  <span class="keywordflow">return</span> error;</div>
<div class="line"><a name="l00136"></a><span class="lineno"> 136</span>  }</div>
<div class="line"><a name="l00137"></a><span class="lineno"> 137</span> <span class="comment"></span></div>
<div class="line"><a name="l00138"></a><span class="lineno"> 138</span> <span class="comment"> /** Create a new format context for the output container format. */</span></div>
<div class="line"><a name="l00139"></a><span class="lineno"> 139</span>  <span class="keywordflow">if</span> (!(*output_format_context = <a class="code" href="group__lavf__core.html#gac7a91abf2f59648d995894711f070f62">avformat_alloc_context</a>())) {</div>
<div class="line"><a name="l00140"></a><span class="lineno"> 140</span>  fprintf(stderr, <span class="stringliteral">"Could not allocate output format context\n"</span>);</div>
<div class="line"><a name="l00141"></a><span class="lineno"> 141</span>  <span class="keywordflow">return</span> <a class="code" href="group__lavu__error.html#gae4bb6f165973d09584e0ec0f335f69ca">AVERROR</a>(ENOMEM);</div>
<div class="line"><a name="l00142"></a><span class="lineno"> 142</span>  }</div>
<div class="line"><a name="l00143"></a><span class="lineno"> 143</span> <span class="comment"></span></div>
<div class="line"><a name="l00144"></a><span class="lineno"> 144</span> <span class="comment"> /** Associate the output file (pointer) with the container format context. */</span></div>
<div class="line"><a name="l00145"></a><span class="lineno"> 145</span>  (*output_format_context)->pb = output_io_context;</div>
<div class="line"><a name="l00146"></a><span class="lineno"> 146</span> <span class="comment"></span></div>
<div class="line"><a name="l00147"></a><span class="lineno"> 147</span> <span class="comment"> /** Guess the desired container format based on the file extension. */</span></div>
<div class="line"><a name="l00148"></a><span class="lineno"> 148</span>  <span class="keywordflow">if</span> (!((*output_format_context)->oformat = <a class="code" href="group__lavf__encoding.html#ga8795680bd7489e96eeb5aef5e615cacc">av_guess_format</a>(NULL, filename,</div>
<div class="line"><a name="l00149"></a><span class="lineno"> 149</span>  NULL))) {</div>
<div class="line"><a name="l00150"></a><span class="lineno"> 150</span>  fprintf(stderr, <span class="stringliteral">"Could not find output file format\n"</span>);</div>
<div class="line"><a name="l00151"></a><span class="lineno"> 151</span>  <span class="keywordflow">goto</span> cleanup;</div>
<div class="line"><a name="l00152"></a><span class="lineno"> 152</span>  }</div>
<div class="line"><a name="l00153"></a><span class="lineno"> 153</span> </div>
<div class="line"><a name="l00154"></a><span class="lineno"> 154</span>  <a class="code" href="group__lavu__string.html#ga716447ae73b612bcf3a405b9b4608f6c">av_strlcpy</a>((*output_format_context)->filename, filename,</div>
<div class="line"><a name="l00155"></a><span class="lineno"> 155</span>  <span class="keyword">sizeof</span>((*output_format_context)->filename));</div>
<div class="line"><a name="l00156"></a><span class="lineno"> 156</span> <span class="comment"></span></div>
<div class="line"><a name="l00157"></a><span class="lineno"> 157</span> <span class="comment"> /** Find the encoder to be used by its name. */</span></div>
<div class="line"><a name="l00158"></a><span class="lineno"> 158</span>  <span class="keywordflow">if</span> (!(output_codec = <a class="code" href="group__lavc__encoding.html#ga9f820c481615c3a02d0407bac0bdbf25">avcodec_find_encoder</a>(<a class="code" href="group__lavc__core.html#ggaadca229ad2c20e060a14fec08a5cc7ceaadba4b5a087e2b6bf2acdd1b5aebb988">AV_CODEC_ID_AAC</a>))) {</div>
<div class="line"><a name="l00159"></a><span class="lineno"> 159</span>  fprintf(stderr, <span class="stringliteral">"Could not find an AAC encoder.\n"</span>);</div>
<div class="line"><a name="l00160"></a><span class="lineno"> 160</span>  <span class="keywordflow">goto</span> cleanup;</div>
<div class="line"><a name="l00161"></a><span class="lineno"> 161</span>  }</div>
<div class="line"><a name="l00162"></a><span class="lineno"> 162</span> <span class="comment"></span></div>
<div class="line"><a name="l00163"></a><span class="lineno"> 163</span> <span class="comment"> /** Create a new audio stream in the output file container. */</span></div>
<div class="line"><a name="l00164"></a><span class="lineno"> 164</span>  <span class="keywordflow">if</span> (!(stream = <a class="code" href="group__lavf__core.html#gadcb0fd3e507d9b58fe78f61f8ad39827">avformat_new_stream</a>(*output_format_context, output_codec))) {</div>
<div class="line"><a name="l00165"></a><span class="lineno"> 165</span>  fprintf(stderr, <span class="stringliteral">"Could not create new stream\n"</span>);</div>
<div class="line"><a name="l00166"></a><span class="lineno"> 166</span>  error = <a class="code" href="group__lavu__error.html#gae4bb6f165973d09584e0ec0f335f69ca">AVERROR</a>(ENOMEM);</div>
<div class="line"><a name="l00167"></a><span class="lineno"> 167</span>  <span class="keywordflow">goto</span> cleanup;</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"></span></div>
<div class="line"><a name="l00170"></a><span class="lineno"> 170</span> <span class="comment"> /** Save the encoder context for easier access later. */</span></div>
<div class="line"><a name="l00171"></a><span class="lineno"> 171</span>  *output_codec_context = stream-><a class="code" href="structAVStream.html#a56f20051fb99339cc588cd3a07ab8c96">codec</a>;</div>
<div class="line"><a name="l00172"></a><span class="lineno"> 172</span> <span class="comment"></span></div>
<div class="line"><a name="l00173"></a><span class="lineno"> 173</span> <span class="comment"> /**</span></div>
<div class="line"><a name="l00174"></a><span class="lineno"> 174</span> <span class="comment"> * Set the basic encoder parameters.</span></div>
<div class="line"><a name="l00175"></a><span class="lineno"> 175</span> <span class="comment"> * The input file's sample rate is used to avoid a sample rate conversion.</span></div>
<div class="line"><a name="l00176"></a><span class="lineno"> 176</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00177"></a><span class="lineno"> 177</span>  (*output_codec_context)-><a class="code" href="structAVCodecContext.html#ac1e6c2cd1269caa7570575725c682a49">channels</a> = <a class="code" href="transcode__aac_8c.html#a4d4855d9b709af9628540e41e5ebb925">OUTPUT_CHANNELS</a>;</div>
<div class="line"><a name="l00178"></a><span class="lineno"> 178</span>  (*output_codec_context)->channel_layout = <a class="code" href="group__channel__mask__c.html#gacb84f3e93a583e1f84a5283162a606a2">av_get_default_channel_layout</a>(<a class="code" href="transcode__aac_8c.html#a4d4855d9b709af9628540e41e5ebb925">OUTPUT_CHANNELS</a>);</div>
<div class="line"><a name="l00179"></a><span class="lineno"> 179</span>  (*output_codec_context)->sample_rate = input_codec_context-><a class="code" href="structAVCodecContext.html#a8ff0b000c463361e234af48d03aadfc0">sample_rate</a>;</div>
<div class="line"><a name="l00180"></a><span class="lineno"> 180</span>  (*output_codec_context)->sample_fmt = output_codec-><a class="code" href="structAVCodec.html#aac19f4c45370f715412ad5c7b78daacf">sample_fmts</a>[0];</div>
<div class="line"><a name="l00181"></a><span class="lineno"> 181</span>  (*output_codec_context)->bit_rate = <a class="code" href="transcode__aac_8c.html#a40d898a8dbfccabcbbff15a29924e97f">OUTPUT_BIT_RATE</a>;</div>
<div class="line"><a name="l00182"></a><span class="lineno"> 182</span> <span class="comment"></span></div>
<div class="line"><a name="l00183"></a><span class="lineno"> 183</span> <span class="comment"> /** Allow the use of the experimental AAC encoder */</span></div>
<div class="line"><a name="l00184"></a><span class="lineno"> 184</span>  (*output_codec_context)->strict_std_compliance = <a class="code" href="avcodec_8h.html#a0e9f40024e3b017088ee1c16f25b3910">FF_COMPLIANCE_EXPERIMENTAL</a>;</div>
<div class="line"><a name="l00185"></a><span class="lineno"> 185</span> <span class="comment"></span></div>
<div class="line"><a name="l00186"></a><span class="lineno"> 186</span> <span class="comment"> /** Set the sample rate for the container. */</span></div>
<div class="line"><a name="l00187"></a><span class="lineno"> 187</span>  stream-><a class="code" href="structAVStream.html#a9db755451f14e2bf590d4b85d82b32e6">time_base</a>.<a class="code" href="structAVRational.html#aee46bdac67d965ac0a4204e753f910c3">den</a> = input_codec_context-><a class="code" href="structAVCodecContext.html#a8ff0b000c463361e234af48d03aadfc0">sample_rate</a>;</div>
<div class="line"><a name="l00188"></a><span class="lineno"> 188</span>  stream-><a class="code" href="structAVStream.html#a9db755451f14e2bf590d4b85d82b32e6">time_base</a>.<a class="code" href="structAVRational.html#ae9a98c10a301c5e937095105b6f0fdb9">num</a> = 1;</div>
<div class="line"><a name="l00189"></a><span class="lineno"> 189</span> <span class="comment"></span></div>
<div class="line"><a name="l00190"></a><span class="lineno"> 190</span> <span class="comment"> /**</span></div>
<div class="line"><a name="l00191"></a><span class="lineno"> 191</span> <span class="comment"> * Some container formats (like MP4) require global headers to be present</span></div>
<div class="line"><a name="l00192"></a><span class="lineno"> 192</span> <span class="comment"> * Mark the encoder so that it behaves accordingly.</span></div>
<div class="line"><a name="l00193"></a><span class="lineno"> 193</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00194"></a><span class="lineno"> 194</span>  <span class="keywordflow">if</span> ((*output_format_context)->oformat->flags & <a class="code" href="avformat_8h.html#ab203c7b734e9c31b7c37d34f6e2c6aef">AVFMT_GLOBALHEADER</a>)</div>
<div class="line"><a name="l00195"></a><span class="lineno"> 195</span>  (*output_codec_context)->flags |= <a class="code" href="group__lavc__core.html#ga9ed82634c59b339786575827c47a8f68">AV_CODEC_FLAG_GLOBAL_HEADER</a>;</div>
<div class="line"><a name="l00196"></a><span class="lineno"> 196</span> <span class="comment"></span></div>
<div class="line"><a name="l00197"></a><span class="lineno"> 197</span> <span class="comment"> /** Open the encoder for the audio stream to use it later. */</span></div>
<div class="line"><a name="l00198"></a><span class="lineno"> 198</span>  <span class="keywordflow">if</span> ((error = <a class="code" href="group__lavc__core.html#ga11f785a188d7d9df71621001465b0f1d">avcodec_open2</a>(*output_codec_context, output_codec, NULL)) < 0) {</div>
<div class="line"><a name="l00199"></a><span class="lineno"> 199</span>  fprintf(stderr, <span class="stringliteral">"Could not open output codec (error '%s')\n"</span>,</div>
<div class="line"><a name="l00200"></a><span class="lineno"> 200</span>  <a class="code" href="transcode__aac_8c.html#adc7cf4c70d2850aecf8c9997a350147c">get_error_text</a>(error));</div>
<div class="line"><a name="l00201"></a><span class="lineno"> 201</span>  <span class="keywordflow">goto</span> cleanup;</div>
<div class="line"><a name="l00202"></a><span class="lineno"> 202</span>  }</div>
<div class="line"><a name="l00203"></a><span class="lineno"> 203</span> </div>
<div class="line"><a name="l00204"></a><span class="lineno"> 204</span>  <span class="keywordflow">return</span> 0;</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> cleanup:</div>
<div class="line"><a name="l00207"></a><span class="lineno"> 207</span>  <a class="code" href="avio_8h.html#ae118a1f37f1e48617609ead9910aac15">avio_closep</a>(&(*output_format_context)->pb);</div>
<div class="line"><a name="l00208"></a><span class="lineno"> 208</span>  <a class="code" href="group__lavf__core.html#gac2990b13b68e831a408fce8e1d0d6445">avformat_free_context</a>(*output_format_context);</div>
<div class="line"><a name="l00209"></a><span class="lineno"> 209</span>  *output_format_context = NULL;</div>
<div class="line"><a name="l00210"></a><span class="lineno"> 210</span>  <span class="keywordflow">return</span> error < 0 ? error : <a class="code" href="group__lavu__error.html#ga334ea23fd9e492cd0e718330f2353b6b">AVERROR_EXIT</a>;</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="comment"></span></div>
<div class="line"><a name="l00213"></a><span class="lineno"> 213</span> <span class="comment">/** Initialize one data packet for reading or writing. */</span></div>
<div class="line"><a name="l00214"></a><span class="lineno"><a class="line" href="transcode__aac_8c.html#a0b457785184f97c7169f9c1c05736990"> 214</a></span> <span class="keyword">static</span> <span class="keywordtype">void</span> <a class="code" href="transcode__aac_8c.html#a0b457785184f97c7169f9c1c05736990">init_packet</a>(<a class="code" href="structAVPacket.html">AVPacket</a> *packet)</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>  <a class="code" href="group__lavc__packet.html#gac9cb9756175b96e7441575803757fb73">av_init_packet</a>(packet);<span class="comment"></span></div>
<div class="line"><a name="l00217"></a><span class="lineno"> 217</span> <span class="comment"> /** Set the packet data and size so that it is recognized as being empty. */</span></div>
<div class="line"><a name="l00218"></a><span class="lineno"> 218</span>  packet-><a class="code" href="structAVPacket.html#aaf4fe58dfcc7c232c1f2268b539d8367">data</a> = NULL;</div>
<div class="line"><a name="l00219"></a><span class="lineno"> 219</span>  packet-><a class="code" href="structAVPacket.html#a4d1ea19f63eb107111fd650ca514d1f4">size</a> = 0;</div>
<div class="line"><a name="l00220"></a><span class="lineno"> 220</span> }</div>
<div class="line"><a name="l00221"></a><span class="lineno"> 221</span> <span class="comment"></span></div>
<div class="line"><a name="l00222"></a><span class="lineno"> 222</span> <span class="comment">/** Initialize one audio frame for reading from the input file */</span></div>
<div class="line"><a name="l00223"></a><span class="lineno"><a class="line" href="transcode__aac_8c.html#a399b9ea45bcc6b114a3e0bef1c743a60"> 223</a></span> <span class="keyword">static</span> <span class="keywordtype">int</span> <a class="code" href="transcode__aac_8c.html#a399b9ea45bcc6b114a3e0bef1c743a60">init_input_frame</a>(<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="l00224"></a><span class="lineno"> 224</span> {</div>
<div class="line"><a name="l00225"></a><span class="lineno"> 225</span>  <span class="keywordflow">if</span> (!(*frame = <a class="code" href="group__lavu__frame.html#gac700017c5270c79c1e1befdeeb008b2f">av_frame_alloc</a>())) {</div>
<div class="line"><a name="l00226"></a><span class="lineno"> 226</span>  fprintf(stderr, <span class="stringliteral">"Could not allocate input frame\n"</span>);</div>
<div class="line"><a name="l00227"></a><span class="lineno"> 227</span>  <span class="keywordflow">return</span> <a class="code" href="group__lavu__error.html#gae4bb6f165973d09584e0ec0f335f69ca">AVERROR</a>(ENOMEM);</div>
<div class="line"><a name="l00228"></a><span class="lineno"> 228</span>  }</div>
<div class="line"><a name="l00229"></a><span class="lineno"> 229</span>  <span class="keywordflow">return</span> 0;</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> <span class="comment"></span></div>
<div class="line"><a name="l00232"></a><span class="lineno"> 232</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00233"></a><span class="lineno"> 233</span> <span class="comment"> * Initialize the audio resampler based on the input and output codec settings.</span></div>
<div class="line"><a name="l00234"></a><span class="lineno"> 234</span> <span class="comment"> * If the input and output sample formats differ, a conversion is required</span></div>
<div class="line"><a name="l00235"></a><span class="lineno"> 235</span> <span class="comment"> * libswresample takes care of this, but requires initialization.</span></div>
<div class="line"><a name="l00236"></a><span class="lineno"> 236</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00237"></a><span class="lineno"><a class="line" href="transcode__aac_8c.html#a68b32c4f40838cc56a7f45d33286d039"> 237</a></span> <span class="keyword">static</span> <span class="keywordtype">int</span> <a class="code" href="transcode__aac_8c.html#a68b32c4f40838cc56a7f45d33286d039">init_resampler</a>(<a class="code" href="structAVCodecContext.html">AVCodecContext</a> *input_codec_context,</div>
<div class="line"><a name="l00238"></a><span class="lineno"> 238</span>  <a class="code" href="structAVCodecContext.html">AVCodecContext</a> *output_codec_context,</div>
<div class="line"><a name="l00239"></a><span class="lineno"> 239</span>  <a class="code" href="group__lswr.html#ga4aa775b7fba31d2c8dc14c7b7e282863">SwrContext</a> **resample_context)</div>
<div class="line"><a name="l00240"></a><span class="lineno"> 240</span> {</div>
<div class="line"><a name="l00241"></a><span class="lineno"> 241</span>  <span class="keywordtype">int</span> error;</div>
<div class="line"><a name="l00242"></a><span class="lineno"> 242</span> <span class="comment"></span></div>
<div class="line"><a name="l00243"></a><span class="lineno"> 243</span> <span class="comment"> /**</span></div>
<div class="line"><a name="l00244"></a><span class="lineno"> 244</span> <span class="comment"> * Create a resampler context for the conversion.</span></div>
<div class="line"><a name="l00245"></a><span class="lineno"> 245</span> <span class="comment"> * Set the conversion parameters.</span></div>
<div class="line"><a name="l00246"></a><span class="lineno"> 246</span> <span class="comment"> * Default channel layouts based on the number of channels</span></div>
<div class="line"><a name="l00247"></a><span class="lineno"> 247</span> <span class="comment"> * are assumed for simplicity (they are sometimes not detected</span></div>
<div class="line"><a name="l00248"></a><span class="lineno"> 248</span> <span class="comment"> * properly by the demuxer and/or decoder).</span></div>
<div class="line"><a name="l00249"></a><span class="lineno"> 249</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00250"></a><span class="lineno"> 250</span>  *resample_context = <a class="code" href="group__lswr.html#gad7f29022726c871aadf935281a9813bc">swr_alloc_set_opts</a>(NULL,</div>
<div class="line"><a name="l00251"></a><span class="lineno"> 251</span>  <a class="code" href="group__channel__mask__c.html#gacb84f3e93a583e1f84a5283162a606a2">av_get_default_channel_layout</a>(output_codec_context-><a class="code" href="structAVCodecContext.html#ac1e6c2cd1269caa7570575725c682a49">channels</a>),</div>
<div class="line"><a name="l00252"></a><span class="lineno"> 252</span>  output_codec_context-><a class="code" href="structAVCodecContext.html#a1bdba69ea111e2a9d03fdaa7a46a4c45">sample_fmt</a>,</div>
<div class="line"><a name="l00253"></a><span class="lineno"> 253</span>  output_codec_context-><a class="code" href="structAVCodecContext.html#a8ff0b000c463361e234af48d03aadfc0">sample_rate</a>,</div>
<div class="line"><a name="l00254"></a><span class="lineno"> 254</span>  <a class="code" href="group__channel__mask__c.html#gacb84f3e93a583e1f84a5283162a606a2">av_get_default_channel_layout</a>(input_codec_context-><a class="code" href="structAVCodecContext.html#ac1e6c2cd1269caa7570575725c682a49">channels</a>),</div>
<div class="line"><a name="l00255"></a><span class="lineno"> 255</span>  input_codec_context-><a class="code" href="structAVCodecContext.html#a1bdba69ea111e2a9d03fdaa7a46a4c45">sample_fmt</a>,</div>
<div class="line"><a name="l00256"></a><span class="lineno"> 256</span>  input_codec_context-><a class="code" href="structAVCodecContext.html#a8ff0b000c463361e234af48d03aadfc0">sample_rate</a>,</div>
<div class="line"><a name="l00257"></a><span class="lineno"> 257</span>  0, NULL);</div>
<div class="line"><a name="l00258"></a><span class="lineno"> 258</span>  <span class="keywordflow">if</span> (!*resample_context) {</div>
<div class="line"><a name="l00259"></a><span class="lineno"> 259</span>  fprintf(stderr, <span class="stringliteral">"Could not allocate resample context\n"</span>);</div>
<div class="line"><a name="l00260"></a><span class="lineno"> 260</span>  <span class="keywordflow">return</span> <a class="code" href="group__lavu__error.html#gae4bb6f165973d09584e0ec0f335f69ca">AVERROR</a>(ENOMEM);</div>
<div class="line"><a name="l00261"></a><span class="lineno"> 261</span>  }<span class="comment"></span></div>
<div class="line"><a name="l00262"></a><span class="lineno"> 262</span> <span class="comment"> /**</span></div>
<div class="line"><a name="l00263"></a><span class="lineno"> 263</span> <span class="comment"> * Perform a sanity check so that the number of converted samples is</span></div>
<div class="line"><a name="l00264"></a><span class="lineno"> 264</span> <span class="comment"> * not greater than the number of samples to be converted.</span></div>
<div class="line"><a name="l00265"></a><span class="lineno"> 265</span> <span class="comment"> * If the sample rates differ, this case has to be handled differently</span></div>
<div class="line"><a name="l00266"></a><span class="lineno"> 266</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00267"></a><span class="lineno"> 267</span>  <a class="code" href="avassert_8h.html#aae204192396f78cc8c5cd7ad5c57c23f">av_assert0</a>(output_codec_context-><a class="code" href="structAVCodecContext.html#a8ff0b000c463361e234af48d03aadfc0">sample_rate</a> == input_codec_context-><a class="code" href="structAVCodecContext.html#a8ff0b000c463361e234af48d03aadfc0">sample_rate</a>);</div>
<div class="line"><a name="l00268"></a><span class="lineno"> 268</span> <span class="comment"></span></div>
<div class="line"><a name="l00269"></a><span class="lineno"> 269</span> <span class="comment"> /** Open the resampler with the specified parameters. */</span></div>
<div class="line"><a name="l00270"></a><span class="lineno"> 270</span>  <span class="keywordflow">if</span> ((error = <a class="code" href="group__lswr.html#gae173e8ed91717700471a1dcd06f00f67">swr_init</a>(*resample_context)) < 0) {</div>
<div class="line"><a name="l00271"></a><span class="lineno"> 271</span>  fprintf(stderr, <span class="stringliteral">"Could not open resample context\n"</span>);</div>
<div class="line"><a name="l00272"></a><span class="lineno"> 272</span>  <a class="code" href="group__lswr.html#ga818f7d78b1ad7d8d5b70de374b668c34">swr_free</a>(resample_context);</div>
<div class="line"><a name="l00273"></a><span class="lineno"> 273</span>  <span class="keywordflow">return</span> error;</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>  <span class="keywordflow">return</span> 0;</div>
<div class="line"><a name="l00276"></a><span class="lineno"> 276</span> }</div>
<div class="line"><a name="l00277"></a><span class="lineno"> 277</span> <span class="comment"></span></div>
<div class="line"><a name="l00278"></a><span class="lineno"> 278</span> <span class="comment">/** Initialize a FIFO buffer for the audio samples to be encoded. */</span></div>
<div class="line"><a name="l00279"></a><span class="lineno"><a class="line" href="transcode__aac_8c.html#a96cd24fde0bde66e80f3141a1def94c6"> 279</a></span> <span class="keyword">static</span> <span class="keywordtype">int</span> <a class="code" href="transcode__aac_8c.html#a96cd24fde0bde66e80f3141a1def94c6">init_fifo</a>(<a class="code" href="group__lavu__audiofifo.html#ga328abb21e9abb2c455d2d9c212d5230f">AVAudioFifo</a> **fifo, <a class="code" href="structAVCodecContext.html">AVCodecContext</a> *output_codec_context)</div>
<div class="line"><a name="l00280"></a><span class="lineno"> 280</span> {<span class="comment"></span></div>
<div class="line"><a name="l00281"></a><span class="lineno"> 281</span> <span class="comment"> /** Create the FIFO buffer based on the specified output sample format. */</span></div>
<div class="line"><a name="l00282"></a><span class="lineno"> 282</span>  <span class="keywordflow">if</span> (!(*fifo = <a class="code" href="group__lavu__audiofifo.html#ga9d792394f0615a329aec47847f8f8784">av_audio_fifo_alloc</a>(output_codec_context-><a class="code" href="structAVCodecContext.html#a1bdba69ea111e2a9d03fdaa7a46a4c45">sample_fmt</a>,</div>
<div class="line"><a name="l00283"></a><span class="lineno"> 283</span>  output_codec_context-><a class="code" href="structAVCodecContext.html#ac1e6c2cd1269caa7570575725c682a49">channels</a>, 1))) {</div>
<div class="line"><a name="l00284"></a><span class="lineno"> 284</span>  fprintf(stderr, <span class="stringliteral">"Could not allocate FIFO\n"</span>);</div>
<div class="line"><a name="l00285"></a><span class="lineno"> 285</span>  <span class="keywordflow">return</span> <a class="code" href="group__lavu__error.html#gae4bb6f165973d09584e0ec0f335f69ca">AVERROR</a>(ENOMEM);</div>
<div class="line"><a name="l00286"></a><span class="lineno"> 286</span>  }</div>
<div class="line"><a name="l00287"></a><span class="lineno"> 287</span>  <span class="keywordflow">return</span> 0;</div>
<div class="line"><a name="l00288"></a><span class="lineno"> 288</span> }</div>
<div class="line"><a name="l00289"></a><span class="lineno"> 289</span> <span class="comment"></span></div>
<div class="line"><a name="l00290"></a><span class="lineno"> 290</span> <span class="comment">/** Write the header of the output file container. */</span></div>
<div class="line"><a name="l00291"></a><span class="lineno"><a class="line" href="transcode__aac_8c.html#a717f7868fc24543151cb94b307e87420"> 291</a></span> <span class="keyword">static</span> <span class="keywordtype">int</span> <a class="code" href="transcode__aac_8c.html#a717f7868fc24543151cb94b307e87420">write_output_file_header</a>(<a class="code" href="structAVFormatContext.html">AVFormatContext</a> *output_format_context)</div>
<div class="line"><a name="l00292"></a><span class="lineno"> 292</span> {</div>
<div class="line"><a name="l00293"></a><span class="lineno"> 293</span>  <span class="keywordtype">int</span> error;</div>
<div class="line"><a name="l00294"></a><span class="lineno"> 294</span>  <span class="keywordflow">if</span> ((error = <a class="code" href="group__lavf__encoding.html#ga18b7b10bb5b94c4842de18166bc677cb">avformat_write_header</a>(output_format_context, NULL)) < 0) {</div>
<div class="line"><a name="l00295"></a><span class="lineno"> 295</span>  fprintf(stderr, <span class="stringliteral">"Could not write output file header (error '%s')\n"</span>,</div>
<div class="line"><a name="l00296"></a><span class="lineno"> 296</span>  <a class="code" href="transcode__aac_8c.html#adc7cf4c70d2850aecf8c9997a350147c">get_error_text</a>(error));</div>
<div class="line"><a name="l00297"></a><span class="lineno"> 297</span>  <span class="keywordflow">return</span> error;</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>  <span class="keywordflow">return</span> 0;</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> <span class="comment"></span></div>
<div class="line"><a name="l00302"></a><span class="lineno"> 302</span> <span class="comment">/** Decode one audio frame from the input file. */</span></div>
<div class="line"><a name="l00303"></a><span class="lineno"><a class="line" href="transcode__aac_8c.html#a5c320cc89448244f68daee53092da98c"> 303</a></span> <span class="keyword">static</span> <span class="keywordtype">int</span> <a class="code" href="transcode__aac_8c.html#a5c320cc89448244f68daee53092da98c">decode_audio_frame</a>(<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="l00304"></a><span class="lineno"> 304</span>  <a class="code" href="structAVFormatContext.html">AVFormatContext</a> *input_format_context,</div>
<div class="line"><a name="l00305"></a><span class="lineno"> 305</span>  <a class="code" href="structAVCodecContext.html">AVCodecContext</a> *input_codec_context,</div>
<div class="line"><a name="l00306"></a><span class="lineno"> 306</span>  <span class="keywordtype">int</span> *data_present, <span class="keywordtype">int</span> *finished)</div>
<div class="line"><a name="l00307"></a><span class="lineno"> 307</span> {<span class="comment"></span></div>
<div class="line"><a name="l00308"></a><span class="lineno"> 308</span> <span class="comment"> /** Packet used for temporary storage. */</span></div>
<div class="line"><a name="l00309"></a><span class="lineno"> 309</span>  <a class="code" href="structAVPacket.html">AVPacket</a> input_packet;</div>
<div class="line"><a name="l00310"></a><span class="lineno"> 310</span>  <span class="keywordtype">int</span> error;</div>
<div class="line"><a name="l00311"></a><span class="lineno"> 311</span>  <a class="code" href="transcode__aac_8c.html#a0b457785184f97c7169f9c1c05736990">init_packet</a>(&input_packet);</div>
<div class="line"><a name="l00312"></a><span class="lineno"> 312</span> <span class="comment"></span></div>
<div class="line"><a name="l00313"></a><span class="lineno"> 313</span> <span class="comment"> /** Read one audio frame from the input file into a temporary packet. */</span></div>
<div class="line"><a name="l00314"></a><span class="lineno"> 314</span>  <span class="keywordflow">if</span> ((error = <a class="code" href="group__lavf__decoding.html#ga4fdb3084415a82e3810de6ee60e46a61">av_read_frame</a>(input_format_context, &input_packet)) < 0) {<span class="comment"></span></div>
<div class="line"><a name="l00315"></a><span class="lineno"> 315</span> <span class="comment"> /** If we are at the end of the file, flush the decoder below. */</span></div>
<div class="line"><a name="l00316"></a><span class="lineno"> 316</span>  <span class="keywordflow">if</span> (error == <a class="code" href="group__lavu__error.html#gab4faa0afdf35076914824200331defff">AVERROR_EOF</a>)</div>
<div class="line"><a name="l00317"></a><span class="lineno"> 317</span>  *finished = 1;</div>
<div class="line"><a name="l00318"></a><span class="lineno"> 318</span>  <span class="keywordflow">else</span> {</div>
<div class="line"><a name="l00319"></a><span class="lineno"> 319</span>  fprintf(stderr, <span class="stringliteral">"Could not read frame (error '%s')\n"</span>,</div>
<div class="line"><a name="l00320"></a><span class="lineno"> 320</span>  <a class="code" href="transcode__aac_8c.html#adc7cf4c70d2850aecf8c9997a350147c">get_error_text</a>(error));</div>
<div class="line"><a name="l00321"></a><span class="lineno"> 321</span>  <span class="keywordflow">return</span> error;</div>
<div class="line"><a name="l00322"></a><span class="lineno"> 322</span>  }</div>
<div class="line"><a name="l00323"></a><span class="lineno"> 323</span>  }</div>
<div class="line"><a name="l00324"></a><span class="lineno"> 324</span> <span class="comment"></span></div>
<div class="line"><a name="l00325"></a><span class="lineno"> 325</span> <span class="comment"> /**</span></div>
<div class="line"><a name="l00326"></a><span class="lineno"> 326</span> <span class="comment"> * Decode the audio frame stored in the temporary packet.</span></div>
<div class="line"><a name="l00327"></a><span class="lineno"> 327</span> <span class="comment"> * The input audio stream decoder is used to do this.</span></div>
<div class="line"><a name="l00328"></a><span class="lineno"> 328</span> <span class="comment"> * If we are at the end of the file, pass an empty packet to the decoder</span></div>
<div class="line"><a name="l00329"></a><span class="lineno"> 329</span> <span class="comment"> * to flush it.</span></div>
<div class="line"><a name="l00330"></a><span class="lineno"> 330</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00331"></a><span class="lineno"> 331</span>  <span class="keywordflow">if</span> ((error = <a class="code" href="group__lavc__decoding.html#ga834bb1b062fbcc2de4cf7fb93f154a3e">avcodec_decode_audio4</a>(input_codec_context, frame,</div>
<div class="line"><a name="l00332"></a><span class="lineno"> 332</span>  data_present, &input_packet)) < 0) {</div>
<div class="line"><a name="l00333"></a><span class="lineno"> 333</span>  fprintf(stderr, <span class="stringliteral">"Could not decode frame (error '%s')\n"</span>,</div>
<div class="line"><a name="l00334"></a><span class="lineno"> 334</span>  <a class="code" href="transcode__aac_8c.html#adc7cf4c70d2850aecf8c9997a350147c">get_error_text</a>(error));</div>
<div class="line"><a name="l00335"></a><span class="lineno"> 335</span>  <a class="code" href="group__lavc__packet.html#ga63d5a489b419bd5d45cfd09091cbcbc2">av_packet_unref</a>(&input_packet);</div>
<div class="line"><a name="l00336"></a><span class="lineno"> 336</span>  <span class="keywordflow">return</span> error;</div>
<div class="line"><a name="l00337"></a><span class="lineno"> 337</span>  }</div>
<div class="line"><a name="l00338"></a><span class="lineno"> 338</span> <span class="comment"></span></div>
<div class="line"><a name="l00339"></a><span class="lineno"> 339</span> <span class="comment"> /**</span></div>
<div class="line"><a name="l00340"></a><span class="lineno"> 340</span> <span class="comment"> * If the decoder has not been flushed completely, we are not finished,</span></div>
<div class="line"><a name="l00341"></a><span class="lineno"> 341</span> <span class="comment"> * so that this function has to be called again.</span></div>
<div class="line"><a name="l00342"></a><span class="lineno"> 342</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00343"></a><span class="lineno"> 343</span>  <span class="keywordflow">if</span> (*finished && *data_present)</div>
<div class="line"><a name="l00344"></a><span class="lineno"> 344</span>  *finished = 0;</div>
<div class="line"><a name="l00345"></a><span class="lineno"> 345</span>  <a class="code" href="group__lavc__packet.html#ga63d5a489b419bd5d45cfd09091cbcbc2">av_packet_unref</a>(&input_packet);</div>
<div class="line"><a name="l00346"></a><span class="lineno"> 346</span>  <span class="keywordflow">return</span> 0;</div>
<div class="line"><a name="l00347"></a><span class="lineno"> 347</span> }</div>
<div class="line"><a name="l00348"></a><span class="lineno"> 348</span> <span class="comment"></span></div>
<div class="line"><a name="l00349"></a><span class="lineno"> 349</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00350"></a><span class="lineno"> 350</span> <span class="comment"> * Initialize a temporary storage for the specified number of audio samples.</span></div>
<div class="line"><a name="l00351"></a><span class="lineno"> 351</span> <span class="comment"> * The conversion requires temporary storage due to the different format.</span></div>
<div class="line"><a name="l00352"></a><span class="lineno"> 352</span> <span class="comment"> * The number of audio samples to be allocated is specified in frame_size.</span></div>
<div class="line"><a name="l00353"></a><span class="lineno"> 353</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00354"></a><span class="lineno"><a class="line" href="transcode__aac_8c.html#af79f075aaf578455b0d2d435e395f1ff"> 354</a></span> <span class="keyword">static</span> <span class="keywordtype">int</span> <a class="code" href="transcode__aac_8c.html#af79f075aaf578455b0d2d435e395f1ff">init_converted_samples</a>(uint8_t ***converted_input_samples,</div>
<div class="line"><a name="l00355"></a><span class="lineno"> 355</span>  <a class="code" href="structAVCodecContext.html">AVCodecContext</a> *output_codec_context,</div>
<div class="line"><a name="l00356"></a><span class="lineno"> 356</span>  <span class="keywordtype">int</span> frame_size)</div>
<div class="line"><a name="l00357"></a><span class="lineno"> 357</span> {</div>
<div class="line"><a name="l00358"></a><span class="lineno"> 358</span>  <span class="keywordtype">int</span> error;</div>
<div class="line"><a name="l00359"></a><span class="lineno"> 359</span> <span class="comment"></span></div>
<div class="line"><a name="l00360"></a><span class="lineno"> 360</span> <span class="comment"> /**</span></div>
<div class="line"><a name="l00361"></a><span class="lineno"> 361</span> <span class="comment"> * Allocate as many pointers as there are audio channels.</span></div>
<div class="line"><a name="l00362"></a><span class="lineno"> 362</span> <span class="comment"> * Each pointer will later point to the audio samples of the corresponding</span></div>
<div class="line"><a name="l00363"></a><span class="lineno"> 363</span> <span class="comment"> * channels (although it may be NULL for interleaved formats).</span></div>
<div class="line"><a name="l00364"></a><span class="lineno"> 364</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00365"></a><span class="lineno"> 365</span>  <span class="keywordflow">if</span> (!(*converted_input_samples = calloc(output_codec_context-><a class="code" href="structAVCodecContext.html#ac1e6c2cd1269caa7570575725c682a49">channels</a>,</div>
<div class="line"><a name="l00366"></a><span class="lineno"> 366</span>  <span class="keyword">sizeof</span>(**converted_input_samples)))) {</div>
<div class="line"><a name="l00367"></a><span class="lineno"> 367</span>  fprintf(stderr, <span class="stringliteral">"Could not allocate converted input sample pointers\n"</span>);</div>
<div class="line"><a name="l00368"></a><span class="lineno"> 368</span>  <span class="keywordflow">return</span> <a class="code" href="group__lavu__error.html#gae4bb6f165973d09584e0ec0f335f69ca">AVERROR</a>(ENOMEM);</div>
<div class="line"><a name="l00369"></a><span class="lineno"> 369</span>  }</div>
<div class="line"><a name="l00370"></a><span class="lineno"> 370</span> <span class="comment"></span></div>
<div class="line"><a name="l00371"></a><span class="lineno"> 371</span> <span class="comment"> /**</span></div>
<div class="line"><a name="l00372"></a><span class="lineno"> 372</span> <span class="comment"> * Allocate memory for the samples of all channels in one consecutive</span></div>
<div class="line"><a name="l00373"></a><span class="lineno"> 373</span> <span class="comment"> * block for convenience.</span></div>
<div class="line"><a name="l00374"></a><span class="lineno"> 374</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00375"></a><span class="lineno"> 375</span>  <span class="keywordflow">if</span> ((error = <a class="code" href="group__lavu__sampmanip.html#ga4db4c77f928d32c7d8854732f50b8c04">av_samples_alloc</a>(*converted_input_samples, NULL,</div>
<div class="line"><a name="l00376"></a><span class="lineno"> 376</span>  output_codec_context-><a class="code" href="structAVCodecContext.html#ac1e6c2cd1269caa7570575725c682a49">channels</a>,</div>
<div class="line"><a name="l00377"></a><span class="lineno"> 377</span>  frame_size,</div>
<div class="line"><a name="l00378"></a><span class="lineno"> 378</span>  output_codec_context-><a class="code" href="structAVCodecContext.html#a1bdba69ea111e2a9d03fdaa7a46a4c45">sample_fmt</a>, 0)) < 0) {</div>
<div class="line"><a name="l00379"></a><span class="lineno"> 379</span>  fprintf(stderr,</div>
<div class="line"><a name="l00380"></a><span class="lineno"> 380</span>  <span class="stringliteral">"Could not allocate converted input samples (error '%s')\n"</span>,</div>
<div class="line"><a name="l00381"></a><span class="lineno"> 381</span>  <a class="code" href="transcode__aac_8c.html#adc7cf4c70d2850aecf8c9997a350147c">get_error_text</a>(error));</div>
<div class="line"><a name="l00382"></a><span class="lineno"> 382</span>  <a class="code" href="group__lavu__mem.html#ga0cc84043ea2167ad005c86e11d0bcdba">av_freep</a>(&(*converted_input_samples)[0]);</div>
<div class="line"><a name="l00383"></a><span class="lineno"> 383</span>  free(*converted_input_samples);</div>
<div class="line"><a name="l00384"></a><span class="lineno"> 384</span>  <span class="keywordflow">return</span> error;</div>
<div class="line"><a name="l00385"></a><span class="lineno"> 385</span>  }</div>
<div class="line"><a name="l00386"></a><span class="lineno"> 386</span>  <span class="keywordflow">return</span> 0;</div>
<div class="line"><a name="l00387"></a><span class="lineno"> 387</span> }</div>
<div class="line"><a name="l00388"></a><span class="lineno"> 388</span> <span class="comment"></span></div>
<div class="line"><a name="l00389"></a><span class="lineno"> 389</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00390"></a><span class="lineno"> 390</span> <span class="comment"> * Convert the input audio samples into the output sample format.</span></div>
<div class="line"><a name="l00391"></a><span class="lineno"> 391</span> <span class="comment"> * The conversion happens on a per-frame basis, the size of which is specified</span></div>
<div class="line"><a name="l00392"></a><span class="lineno"> 392</span> <span class="comment"> * by frame_size.</span></div>
<div class="line"><a name="l00393"></a><span class="lineno"> 393</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00394"></a><span class="lineno"><a class="line" href="transcode__aac_8c.html#af01916898adcdf3776690407bd1e2b82"> 394</a></span> <span class="keyword">static</span> <span class="keywordtype">int</span> <a class="code" href="transcode__aac_8c.html#af01916898adcdf3776690407bd1e2b82">convert_samples</a>(<span class="keyword">const</span> uint8_t **input_data,</div>
<div class="line"><a name="l00395"></a><span class="lineno"> 395</span>  uint8_t **converted_data, <span class="keyword">const</span> <span class="keywordtype">int</span> frame_size,</div>
<div class="line"><a name="l00396"></a><span class="lineno"> 396</span>  <a class="code" href="group__lswr.html#ga4aa775b7fba31d2c8dc14c7b7e282863">SwrContext</a> *resample_context)</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>  <span class="keywordtype">int</span> error;</div>
<div class="line"><a name="l00399"></a><span class="lineno"> 399</span> <span class="comment"></span></div>
<div class="line"><a name="l00400"></a><span class="lineno"> 400</span> <span class="comment"> /** Convert the samples using the resampler. */</span></div>
<div class="line"><a name="l00401"></a><span class="lineno"> 401</span>  <span class="keywordflow">if</span> ((error = <a class="code" href="group__lswr.html#gaa5bb6cab830146efa8c760fa66ee582a">swr_convert</a>(resample_context,</div>
<div class="line"><a name="l00402"></a><span class="lineno"> 402</span>  converted_data, frame_size,</div>
<div class="line"><a name="l00403"></a><span class="lineno"> 403</span>  input_data , frame_size)) < 0) {</div>
<div class="line"><a name="l00404"></a><span class="lineno"> 404</span>  fprintf(stderr, <span class="stringliteral">"Could not convert input samples (error '%s')\n"</span>,</div>
<div class="line"><a name="l00405"></a><span class="lineno"> 405</span>  <a class="code" href="transcode__aac_8c.html#adc7cf4c70d2850aecf8c9997a350147c">get_error_text</a>(error));</div>
<div class="line"><a name="l00406"></a><span class="lineno"> 406</span>  <span class="keywordflow">return</span> error;</div>
<div class="line"><a name="l00407"></a><span class="lineno"> 407</span>  }</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>  <span class="keywordflow">return</span> 0;</div>
<div class="line"><a name="l00410"></a><span class="lineno"> 410</span> }</div>
<div class="line"><a name="l00411"></a><span class="lineno"> 411</span> <span class="comment"></span></div>
<div class="line"><a name="l00412"></a><span class="lineno"> 412</span> <span class="comment">/** Add converted input audio samples to the FIFO buffer for later processing. */</span></div>
<div class="line"><a name="l00413"></a><span class="lineno"><a class="line" href="transcode__aac_8c.html#a1509aea4299c0261c6c3f2a7bc8971d2"> 413</a></span> <span class="keyword">static</span> <span class="keywordtype">int</span> <a class="code" href="transcode__aac_8c.html#a1509aea4299c0261c6c3f2a7bc8971d2">add_samples_to_fifo</a>(<a class="code" href="group__lavu__audiofifo.html#ga328abb21e9abb2c455d2d9c212d5230f">AVAudioFifo</a> *fifo,</div>
<div class="line"><a name="l00414"></a><span class="lineno"> 414</span>  uint8_t **converted_input_samples,</div>
<div class="line"><a name="l00415"></a><span class="lineno"> 415</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> frame_size)</div>
<div class="line"><a name="l00416"></a><span class="lineno"> 416</span> {</div>
<div class="line"><a name="l00417"></a><span class="lineno"> 417</span>  <span class="keywordtype">int</span> error;</div>
<div class="line"><a name="l00418"></a><span class="lineno"> 418</span> <span class="comment"></span></div>
<div class="line"><a name="l00419"></a><span class="lineno"> 419</span> <span class="comment"> /**</span></div>
<div class="line"><a name="l00420"></a><span class="lineno"> 420</span> <span class="comment"> * Make the FIFO as large as it needs to be to hold both,</span></div>
<div class="line"><a name="l00421"></a><span class="lineno"> 421</span> <span class="comment"> * the old and the new samples.</span></div>
<div class="line"><a name="l00422"></a><span class="lineno"> 422</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00423"></a><span class="lineno"> 423</span>  <span class="keywordflow">if</span> ((error = <a class="code" href="group__lavu__audiofifo.html#ga27c1e16e5f09940d6016b1971c0b5742">av_audio_fifo_realloc</a>(fifo, <a class="code" href="group__lavu__audiofifo.html#gaa0a4742ecac52a999e8b4478d27f3b9b">av_audio_fifo_size</a>(fifo) + frame_size)) < 0) {</div>
<div class="line"><a name="l00424"></a><span class="lineno"> 424</span>  fprintf(stderr, <span class="stringliteral">"Could not reallocate FIFO\n"</span>);</div>
<div class="line"><a name="l00425"></a><span class="lineno"> 425</span>  <span class="keywordflow">return</span> error;</div>
<div class="line"><a name="l00426"></a><span class="lineno"> 426</span>  }</div>
<div class="line"><a name="l00427"></a><span class="lineno"> 427</span> <span class="comment"></span></div>
<div class="line"><a name="l00428"></a><span class="lineno"> 428</span> <span class="comment"> /** Store the new samples in the FIFO buffer. */</span></div>
<div class="line"><a name="l00429"></a><span class="lineno"> 429</span>  <span class="keywordflow">if</span> (<a class="code" href="group__lavu__audiofifo.html#ga0e7fadeea09c52a96eb4082a9e169bb4">av_audio_fifo_write</a>(fifo, (<span class="keywordtype">void</span> **)converted_input_samples,</div>
<div class="line"><a name="l00430"></a><span class="lineno"> 430</span>  frame_size) < frame_size) {</div>
<div class="line"><a name="l00431"></a><span class="lineno"> 431</span>  fprintf(stderr, <span class="stringliteral">"Could not write data to FIFO\n"</span>);</div>
<div class="line"><a name="l00432"></a><span class="lineno"> 432</span>  <span class="keywordflow">return</span> <a class="code" href="group__lavu__error.html#ga334ea23fd9e492cd0e718330f2353b6b">AVERROR_EXIT</a>;</div>
<div class="line"><a name="l00433"></a><span class="lineno"> 433</span>  }</div>
<div class="line"><a name="l00434"></a><span class="lineno"> 434</span>  <span class="keywordflow">return</span> 0;</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> <span class="comment"></span></div>
<div class="line"><a name="l00437"></a><span class="lineno"> 437</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00438"></a><span class="lineno"> 438</span> <span class="comment"> * Read one audio frame from the input file, decodes, converts and stores</span></div>
<div class="line"><a name="l00439"></a><span class="lineno"> 439</span> <span class="comment"> * it in the FIFO buffer.</span></div>
<div class="line"><a name="l00440"></a><span class="lineno"> 440</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00441"></a><span class="lineno"><a class="line" href="transcode__aac_8c.html#a7f6cf47c64ae78cbdad6115e57aa2c2f"> 441</a></span> <span class="keyword">static</span> <span class="keywordtype">int</span> <a class="code" href="transcode__aac_8c.html#a7f6cf47c64ae78cbdad6115e57aa2c2f">read_decode_convert_and_store</a>(<a class="code" href="group__lavu__audiofifo.html#ga328abb21e9abb2c455d2d9c212d5230f">AVAudioFifo</a> *fifo,</div>
<div class="line"><a name="l00442"></a><span class="lineno"> 442</span>  <a class="code" href="structAVFormatContext.html">AVFormatContext</a> *input_format_context,</div>
<div class="line"><a name="l00443"></a><span class="lineno"> 443</span>  <a class="code" href="structAVCodecContext.html">AVCodecContext</a> *input_codec_context,</div>
<div class="line"><a name="l00444"></a><span class="lineno"> 444</span>  <a class="code" href="structAVCodecContext.html">AVCodecContext</a> *output_codec_context,</div>
<div class="line"><a name="l00445"></a><span class="lineno"> 445</span>  <a class="code" href="group__lswr.html#ga4aa775b7fba31d2c8dc14c7b7e282863">SwrContext</a> *resampler_context,</div>
<div class="line"><a name="l00446"></a><span class="lineno"> 446</span>  <span class="keywordtype">int</span> *finished)</div>
<div class="line"><a name="l00447"></a><span class="lineno"> 447</span> {<span class="comment"></span></div>
<div class="line"><a name="l00448"></a><span class="lineno"> 448</span> <span class="comment"> /** Temporary storage of the input samples of the frame read from the file. */</span></div>
<div class="line"><a name="l00449"></a><span class="lineno"> 449</span>  <a class="code" href="structAVFrame.html">AVFrame</a> *input_frame = NULL;<span class="comment"></span></div>
<div class="line"><a name="l00450"></a><span class="lineno"> 450</span> <span class="comment"> /** Temporary storage for the converted input samples. */</span></div>
<div class="line"><a name="l00451"></a><span class="lineno"> 451</span>  uint8_t **converted_input_samples = NULL;</div>
<div class="line"><a name="l00452"></a><span class="lineno"> 452</span>  <span class="keywordtype">int</span> data_present;</div>
<div class="line"><a name="l00453"></a><span class="lineno"> 453</span>  <span class="keywordtype">int</span> ret = <a class="code" href="group__lavu__error.html#ga334ea23fd9e492cd0e718330f2353b6b">AVERROR_EXIT</a>;</div>
<div class="line"><a name="l00454"></a><span class="lineno"> 454</span> <span class="comment"></span></div>
<div class="line"><a name="l00455"></a><span class="lineno"> 455</span> <span class="comment"> /** Initialize temporary storage for one input frame. */</span></div>
<div class="line"><a name="l00456"></a><span class="lineno"> 456</span>  <span class="keywordflow">if</span> (<a class="code" href="transcode__aac_8c.html#a399b9ea45bcc6b114a3e0bef1c743a60">init_input_frame</a>(&input_frame))</div>
<div class="line"><a name="l00457"></a><span class="lineno"> 457</span>  <span class="keywordflow">goto</span> cleanup;<span class="comment"></span></div>
<div class="line"><a name="l00458"></a><span class="lineno"> 458</span> <span class="comment"> /** Decode one frame worth of audio samples. */</span></div>
<div class="line"><a name="l00459"></a><span class="lineno"> 459</span>  <span class="keywordflow">if</span> (<a class="code" href="transcode__aac_8c.html#a5c320cc89448244f68daee53092da98c">decode_audio_frame</a>(input_frame, input_format_context,</div>
<div class="line"><a name="l00460"></a><span class="lineno"> 460</span>  input_codec_context, &data_present, finished))</div>
<div class="line"><a name="l00461"></a><span class="lineno"> 461</span>  <span class="keywordflow">goto</span> cleanup;<span class="comment"></span></div>
<div class="line"><a name="l00462"></a><span class="lineno"> 462</span> <span class="comment"> /**</span></div>
<div class="line"><a name="l00463"></a><span class="lineno"> 463</span> <span class="comment"> * If we are at the end of the file and there are no more samples</span></div>
<div class="line"><a name="l00464"></a><span class="lineno"> 464</span> <span class="comment"> * in the decoder which are delayed, we are actually finished.</span></div>
<div class="line"><a name="l00465"></a><span class="lineno"> 465</span> <span class="comment"> * This must not be treated as an error.</span></div>
<div class="line"><a name="l00466"></a><span class="lineno"> 466</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00467"></a><span class="lineno"> 467</span>  <span class="keywordflow">if</span> (*finished && !data_present) {</div>
<div class="line"><a name="l00468"></a><span class="lineno"> 468</span>  ret = 0;</div>
<div class="line"><a name="l00469"></a><span class="lineno"> 469</span>  <span class="keywordflow">goto</span> cleanup;</div>
<div class="line"><a name="l00470"></a><span class="lineno"> 470</span>  }<span class="comment"></span></div>
<div class="line"><a name="l00471"></a><span class="lineno"> 471</span> <span class="comment"> /** If there is decoded data, convert and store it */</span></div>
<div class="line"><a name="l00472"></a><span class="lineno"> 472</span>  <span class="keywordflow">if</span> (data_present) {<span class="comment"></span></div>
<div class="line"><a name="l00473"></a><span class="lineno"> 473</span> <span class="comment"> /** Initialize the temporary storage for the converted input samples. */</span></div>
<div class="line"><a name="l00474"></a><span class="lineno"> 474</span>  <span class="keywordflow">if</span> (<a class="code" href="transcode__aac_8c.html#af79f075aaf578455b0d2d435e395f1ff">init_converted_samples</a>(&converted_input_samples, output_codec_context,</div>
<div class="line"><a name="l00475"></a><span class="lineno"> 475</span>  input_frame-><a class="code" href="structAVFrame.html#a02f45ab8191aea1660159f1e464237ea">nb_samples</a>))</div>
<div class="line"><a name="l00476"></a><span class="lineno"> 476</span>  <span class="keywordflow">goto</span> cleanup;</div>
<div class="line"><a name="l00477"></a><span class="lineno"> 477</span> <span class="comment"></span></div>
<div class="line"><a name="l00478"></a><span class="lineno"> 478</span> <span class="comment"> /**</span></div>
<div class="line"><a name="l00479"></a><span class="lineno"> 479</span> <span class="comment"> * Convert the input samples to the desired output sample format.</span></div>
<div class="line"><a name="l00480"></a><span class="lineno"> 480</span> <span class="comment"> * This requires a temporary storage provided by converted_input_samples.</span></div>
<div class="line"><a name="l00481"></a><span class="lineno"> 481</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00482"></a><span class="lineno"> 482</span>  <span class="keywordflow">if</span> (<a class="code" href="transcode__aac_8c.html#af01916898adcdf3776690407bd1e2b82">convert_samples</a>((<span class="keyword">const</span> uint8_t**)input_frame-><a class="code" href="structAVFrame.html#afca04d808393822625e09b5ba91c6756">extended_data</a>, converted_input_samples,</div>
<div class="line"><a name="l00483"></a><span class="lineno"> 483</span>  input_frame-><a class="code" href="structAVFrame.html#a02f45ab8191aea1660159f1e464237ea">nb_samples</a>, resampler_context))</div>
<div class="line"><a name="l00484"></a><span class="lineno"> 484</span>  <span class="keywordflow">goto</span> cleanup;</div>
<div class="line"><a name="l00485"></a><span class="lineno"> 485</span> <span class="comment"></span></div>
<div class="line"><a name="l00486"></a><span class="lineno"> 486</span> <span class="comment"> /** Add the converted input samples to the FIFO buffer for later processing. */</span></div>
<div class="line"><a name="l00487"></a><span class="lineno"> 487</span>  <span class="keywordflow">if</span> (<a class="code" href="transcode__aac_8c.html#a1509aea4299c0261c6c3f2a7bc8971d2">add_samples_to_fifo</a>(fifo, converted_input_samples,</div>
<div class="line"><a name="l00488"></a><span class="lineno"> 488</span>  input_frame-><a class="code" href="structAVFrame.html#a02f45ab8191aea1660159f1e464237ea">nb_samples</a>))</div>
<div class="line"><a name="l00489"></a><span class="lineno"> 489</span>  <span class="keywordflow">goto</span> cleanup;</div>
<div class="line"><a name="l00490"></a><span class="lineno"> 490</span>  ret = 0;</div>
<div class="line"><a name="l00491"></a><span class="lineno"> 491</span>  }</div>
<div class="line"><a name="l00492"></a><span class="lineno"> 492</span>  ret = 0;</div>
<div class="line"><a name="l00493"></a><span class="lineno"> 493</span> </div>
<div class="line"><a name="l00494"></a><span class="lineno"> 494</span> cleanup:</div>
<div class="line"><a name="l00495"></a><span class="lineno"> 495</span>  <span class="keywordflow">if</span> (converted_input_samples) {</div>
<div class="line"><a name="l00496"></a><span class="lineno"> 496</span>  <a class="code" href="group__lavu__mem.html#ga0cc84043ea2167ad005c86e11d0bcdba">av_freep</a>(&converted_input_samples[0]);</div>
<div class="line"><a name="l00497"></a><span class="lineno"> 497</span>  free(converted_input_samples);</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>  <a class="code" href="group__lavu__frame.html#ga979d73f3228814aee56aeca0636e37cc">av_frame_free</a>(&input_frame);</div>
<div class="line"><a name="l00500"></a><span class="lineno"> 500</span> </div>
<div class="line"><a name="l00501"></a><span class="lineno"> 501</span>  <span class="keywordflow">return</span> ret;</div>
<div class="line"><a name="l00502"></a><span class="lineno"> 502</span> }</div>
<div class="line"><a name="l00503"></a><span class="lineno"> 503</span> <span class="comment"></span></div>
<div class="line"><a name="l00504"></a><span class="lineno"> 504</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00505"></a><span class="lineno"> 505</span> <span class="comment"> * Initialize one input frame for writing to the output file.</span></div>
<div class="line"><a name="l00506"></a><span class="lineno"> 506</span> <span class="comment"> * The frame will be exactly frame_size samples large.</span></div>
<div class="line"><a name="l00507"></a><span class="lineno"> 507</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00508"></a><span class="lineno"><a class="line" href="transcode__aac_8c.html#a72741423006b4ab38bf924fa567e7081"> 508</a></span> <span class="keyword">static</span> <span class="keywordtype">int</span> <a class="code" href="transcode__aac_8c.html#a72741423006b4ab38bf924fa567e7081">init_output_frame</a>(<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="l00509"></a><span class="lineno"> 509</span>  <a class="code" href="structAVCodecContext.html">AVCodecContext</a> *output_codec_context,</div>
<div class="line"><a name="l00510"></a><span class="lineno"> 510</span>  <span class="keywordtype">int</span> frame_size)</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>  <span class="keywordtype">int</span> error;</div>
<div class="line"><a name="l00513"></a><span class="lineno"> 513</span> <span class="comment"></span></div>
<div class="line"><a name="l00514"></a><span class="lineno"> 514</span> <span class="comment"> /** Create a new frame to store the audio samples. */</span></div>
<div class="line"><a name="l00515"></a><span class="lineno"> 515</span>  <span class="keywordflow">if</span> (!(*frame = <a class="code" href="group__lavu__frame.html#gac700017c5270c79c1e1befdeeb008b2f">av_frame_alloc</a>())) {</div>
<div class="line"><a name="l00516"></a><span class="lineno"> 516</span>  fprintf(stderr, <span class="stringliteral">"Could not allocate output frame\n"</span>);</div>
<div class="line"><a name="l00517"></a><span class="lineno"> 517</span>  <span class="keywordflow">return</span> <a class="code" href="group__lavu__error.html#ga334ea23fd9e492cd0e718330f2353b6b">AVERROR_EXIT</a>;</div>
<div class="line"><a name="l00518"></a><span class="lineno"> 518</span>  }</div>
<div class="line"><a name="l00519"></a><span class="lineno"> 519</span> <span class="comment"></span></div>
<div class="line"><a name="l00520"></a><span class="lineno"> 520</span> <span class="comment"> /**</span></div>
<div class="line"><a name="l00521"></a><span class="lineno"> 521</span> <span class="comment"> * Set the frame's parameters, especially its size and format.</span></div>
<div class="line"><a name="l00522"></a><span class="lineno"> 522</span> <span class="comment"> * av_frame_get_buffer needs this to allocate memory for the</span></div>
<div class="line"><a name="l00523"></a><span class="lineno"> 523</span> <span class="comment"> * audio samples of the frame.</span></div>
<div class="line"><a name="l00524"></a><span class="lineno"> 524</span> <span class="comment"> * Default channel layouts based on the number of channels</span></div>
<div class="line"><a name="l00525"></a><span class="lineno"> 525</span> <span class="comment"> * are assumed for simplicity.</span></div>
<div class="line"><a name="l00526"></a><span class="lineno"> 526</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00527"></a><span class="lineno"> 527</span>  (*frame)->nb_samples = frame_size;</div>
<div class="line"><a name="l00528"></a><span class="lineno"> 528</span>  (*frame)->channel_layout = output_codec_context-><a class="code" href="structAVCodecContext.html#aeb08c575a79eb84fc4155dda88f46c06">channel_layout</a>;</div>
<div class="line"><a name="l00529"></a><span class="lineno"> 529</span>  (*frame)->format = output_codec_context-><a class="code" href="structAVCodecContext.html#a1bdba69ea111e2a9d03fdaa7a46a4c45">sample_fmt</a>;</div>
<div class="line"><a name="l00530"></a><span class="lineno"> 530</span>  (*frame)->sample_rate = output_codec_context-><a class="code" href="structAVCodecContext.html#a8ff0b000c463361e234af48d03aadfc0">sample_rate</a>;</div>
<div class="line"><a name="l00531"></a><span class="lineno"> 531</span> <span class="comment"></span></div>
<div class="line"><a name="l00532"></a><span class="lineno"> 532</span> <span class="comment"> /**</span></div>
<div class="line"><a name="l00533"></a><span class="lineno"> 533</span> <span class="comment"> * Allocate the samples of the created frame. This call will make</span></div>
<div class="line"><a name="l00534"></a><span class="lineno"> 534</span> <span class="comment"> * sure that the audio frame can hold as many samples as specified.</span></div>
<div class="line"><a name="l00535"></a><span class="lineno"> 535</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00536"></a><span class="lineno"> 536</span>  <span class="keywordflow">if</span> ((error = <a class="code" href="group__lavu__frame.html#ga6b1acbfa82c79bf7fd78d868572f0ceb">av_frame_get_buffer</a>(*frame, 0)) < 0) {</div>
<div class="line"><a name="l00537"></a><span class="lineno"> 537</span>  fprintf(stderr, <span class="stringliteral">"Could allocate output frame samples (error '%s')\n"</span>,</div>
<div class="line"><a name="l00538"></a><span class="lineno"> 538</span>  <a class="code" href="transcode__aac_8c.html#adc7cf4c70d2850aecf8c9997a350147c">get_error_text</a>(error));</div>
<div class="line"><a name="l00539"></a><span class="lineno"> 539</span>  <a class="code" href="group__lavu__frame.html#ga979d73f3228814aee56aeca0636e37cc">av_frame_free</a>(frame);</div>
<div class="line"><a name="l00540"></a><span class="lineno"> 540</span>  <span class="keywordflow">return</span> error;</div>
<div class="line"><a name="l00541"></a><span class="lineno"> 541</span>  }</div>
<div class="line"><a name="l00542"></a><span class="lineno"> 542</span> </div>
<div class="line"><a name="l00543"></a><span class="lineno"> 543</span>  <span class="keywordflow">return</span> 0;</div>
<div class="line"><a name="l00544"></a><span class="lineno"> 544</span> }</div>
<div class="line"><a name="l00545"></a><span class="lineno"> 545</span> <span class="comment"></span></div>
<div class="line"><a name="l00546"></a><span class="lineno"> 546</span> <span class="comment">/** Global timestamp for the audio frames */</span></div>
<div class="line"><a name="l00547"></a><span class="lineno"><a class="line" href="transcode__aac_8c.html#a4fbb704fb96c36a78a36eee010306ce7"> 547</a></span> <span class="keyword">static</span> int64_t <a class="code" href="transcode__aac_8c.html#a4fbb704fb96c36a78a36eee010306ce7">pts</a> = 0;</div>
<div class="line"><a name="l00548"></a><span class="lineno"> 548</span> <span class="comment"></span></div>
<div class="line"><a name="l00549"></a><span class="lineno"> 549</span> <span class="comment">/** Encode one frame worth of audio to the output file. */</span></div>
<div class="line"><a name="l00550"></a><span class="lineno"><a class="line" href="transcode__aac_8c.html#a3d408f21612691f8c93a7aa24ea554ef"> 550</a></span> <span class="keyword">static</span> <span class="keywordtype">int</span> <a class="code" href="transcode__aac_8c.html#a3d408f21612691f8c93a7aa24ea554ef">encode_audio_frame</a>(<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="l00551"></a><span class="lineno"> 551</span>  <a class="code" href="structAVFormatContext.html">AVFormatContext</a> *output_format_context,</div>
<div class="line"><a name="l00552"></a><span class="lineno"> 552</span>  <a class="code" href="structAVCodecContext.html">AVCodecContext</a> *output_codec_context,</div>
<div class="line"><a name="l00553"></a><span class="lineno"> 553</span>  <span class="keywordtype">int</span> *data_present)</div>
<div class="line"><a name="l00554"></a><span class="lineno"> 554</span> {<span class="comment"></span></div>
<div class="line"><a name="l00555"></a><span class="lineno"> 555</span> <span class="comment"> /** Packet used for temporary storage. */</span></div>
<div class="line"><a name="l00556"></a><span class="lineno"> 556</span>  <a class="code" href="structAVPacket.html">AVPacket</a> output_packet;</div>
<div class="line"><a name="l00557"></a><span class="lineno"> 557</span>  <span class="keywordtype">int</span> error;</div>
<div class="line"><a name="l00558"></a><span class="lineno"> 558</span>  <a class="code" href="transcode__aac_8c.html#a0b457785184f97c7169f9c1c05736990">init_packet</a>(&output_packet);</div>
<div class="line"><a name="l00559"></a><span class="lineno"> 559</span> <span class="comment"></span></div>
<div class="line"><a name="l00560"></a><span class="lineno"> 560</span> <span class="comment"> /** Set a timestamp based on the sample rate for the container. */</span></div>
<div class="line"><a name="l00561"></a><span class="lineno"> 561</span>  <span class="keywordflow">if</span> (frame) {</div>
<div class="line"><a name="l00562"></a><span class="lineno"> 562</span>  frame-><a class="code" href="structAVFrame.html#a0452833e3ab6ddd7acbf82817a7818a4">pts</a> = <a class="code" href="transcode__aac_8c.html#a4fbb704fb96c36a78a36eee010306ce7">pts</a>;</div>
<div class="line"><a name="l00563"></a><span class="lineno"> 563</span>  <a class="code" href="transcode__aac_8c.html#a4fbb704fb96c36a78a36eee010306ce7">pts</a> += frame-><a class="code" href="structAVFrame.html#a02f45ab8191aea1660159f1e464237ea">nb_samples</a>;</div>
<div class="line"><a name="l00564"></a><span class="lineno"> 564</span>  }</div>
<div class="line"><a name="l00565"></a><span class="lineno"> 565</span> <span class="comment"></span></div>
<div class="line"><a name="l00566"></a><span class="lineno"> 566</span> <span class="comment"> /**</span></div>
<div class="line"><a name="l00567"></a><span class="lineno"> 567</span> <span class="comment"> * Encode the audio frame and store it in the temporary packet.</span></div>
<div class="line"><a name="l00568"></a><span class="lineno"> 568</span> <span class="comment"> * The output audio stream encoder is used to do this.</span></div>
<div class="line"><a name="l00569"></a><span class="lineno"> 569</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00570"></a><span class="lineno"> 570</span>  <span class="keywordflow">if</span> ((error = <a class="code" href="group__lavc__encoding.html#ga93a49fbd0973b216dcb8a8c5dffe1d82">avcodec_encode_audio2</a>(output_codec_context, &output_packet,</div>
<div class="line"><a name="l00571"></a><span class="lineno"> 571</span>  frame, data_present)) < 0) {</div>
<div class="line"><a name="l00572"></a><span class="lineno"> 572</span>  fprintf(stderr, <span class="stringliteral">"Could not encode frame (error '%s')\n"</span>,</div>
<div class="line"><a name="l00573"></a><span class="lineno"> 573</span>  <a class="code" href="transcode__aac_8c.html#adc7cf4c70d2850aecf8c9997a350147c">get_error_text</a>(error));</div>
<div class="line"><a name="l00574"></a><span class="lineno"> 574</span>  <a class="code" href="group__lavc__packet.html#ga63d5a489b419bd5d45cfd09091cbcbc2">av_packet_unref</a>(&output_packet);</div>
<div class="line"><a name="l00575"></a><span class="lineno"> 575</span>  <span class="keywordflow">return</span> error;</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> <span class="comment"></span></div>
<div class="line"><a name="l00578"></a><span class="lineno"> 578</span> <span class="comment"> /** Write one audio frame from the temporary packet to the output file. */</span></div>
<div class="line"><a name="l00579"></a><span class="lineno"> 579</span>  <span class="keywordflow">if</span> (*data_present) {</div>
<div class="line"><a name="l00580"></a><span class="lineno"> 580</span>  <span class="keywordflow">if</span> ((error = <a class="code" href="group__lavf__encoding.html#gaa85cc1774f18f306cd20a40fc50d0b36">av_write_frame</a>(output_format_context, &output_packet)) < 0) {</div>
<div class="line"><a name="l00581"></a><span class="lineno"> 581</span>  fprintf(stderr, <span class="stringliteral">"Could not write frame (error '%s')\n"</span>,</div>
<div class="line"><a name="l00582"></a><span class="lineno"> 582</span>  <a class="code" href="transcode__aac_8c.html#adc7cf4c70d2850aecf8c9997a350147c">get_error_text</a>(error));</div>
<div class="line"><a name="l00583"></a><span class="lineno"> 583</span>  <a class="code" href="group__lavc__packet.html#ga63d5a489b419bd5d45cfd09091cbcbc2">av_packet_unref</a>(&output_packet);</div>
<div class="line"><a name="l00584"></a><span class="lineno"> 584</span>  <span class="keywordflow">return</span> error;</div>
<div class="line"><a name="l00585"></a><span class="lineno"> 585</span>  }</div>
<div class="line"><a name="l00586"></a><span class="lineno"> 586</span> </div>
<div class="line"><a name="l00587"></a><span class="lineno"> 587</span>  <a class="code" href="group__lavc__packet.html#ga63d5a489b419bd5d45cfd09091cbcbc2">av_packet_unref</a>(&output_packet);</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> </div>
<div class="line"><a name="l00590"></a><span class="lineno"> 590</span>  <span class="keywordflow">return</span> 0;</div>
<div class="line"><a name="l00591"></a><span class="lineno"> 591</span> }</div>
<div class="line"><a name="l00592"></a><span class="lineno"> 592</span> <span class="comment"></span></div>
<div class="line"><a name="l00593"></a><span class="lineno"> 593</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00594"></a><span class="lineno"> 594</span> <span class="comment"> * Load one audio frame from the FIFO buffer, encode and write it to the</span></div>
<div class="line"><a name="l00595"></a><span class="lineno"> 595</span> <span class="comment"> * output file.</span></div>
<div class="line"><a name="l00596"></a><span class="lineno"> 596</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00597"></a><span class="lineno"><a class="line" href="transcode__aac_8c.html#ab4367e0049c0bbd56eec8c525cdbd6e5"> 597</a></span> <span class="keyword">static</span> <span class="keywordtype">int</span> <a class="code" href="transcode__aac_8c.html#ab4367e0049c0bbd56eec8c525cdbd6e5">load_encode_and_write</a>(<a class="code" href="group__lavu__audiofifo.html#ga328abb21e9abb2c455d2d9c212d5230f">AVAudioFifo</a> *fifo,</div>
<div class="line"><a name="l00598"></a><span class="lineno"> 598</span>  <a class="code" href="structAVFormatContext.html">AVFormatContext</a> *output_format_context,</div>
<div class="line"><a name="l00599"></a><span class="lineno"> 599</span>  <a class="code" href="structAVCodecContext.html">AVCodecContext</a> *output_codec_context)</div>
<div class="line"><a name="l00600"></a><span class="lineno"> 600</span> {<span class="comment"></span></div>
<div class="line"><a name="l00601"></a><span class="lineno"> 601</span> <span class="comment"> /** Temporary storage of the output samples of the frame written to the file. */</span></div>
<div class="line"><a name="l00602"></a><span class="lineno"> 602</span>  <a class="code" href="structAVFrame.html">AVFrame</a> *output_frame;<span class="comment"></span></div>
<div class="line"><a name="l00603"></a><span class="lineno"> 603</span> <span class="comment"> /**</span></div>
<div class="line"><a name="l00604"></a><span class="lineno"> 604</span> <span class="comment"> * Use the maximum number of possible samples per frame.</span></div>
<div class="line"><a name="l00605"></a><span class="lineno"> 605</span> <span class="comment"> * If there is less than the maximum possible frame size in the FIFO</span></div>
<div class="line"><a name="l00606"></a><span class="lineno"> 606</span> <span class="comment"> * buffer use this number. Otherwise, use the maximum possible frame size</span></div>
<div class="line"><a name="l00607"></a><span class="lineno"> 607</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00608"></a><span class="lineno"> 608</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> frame_size = <a class="code" href="common_8h.html#a0f84cbd7fd810cd678157c98cbfad4b0">FFMIN</a>(<a class="code" href="group__lavu__audiofifo.html#gaa0a4742ecac52a999e8b4478d27f3b9b">av_audio_fifo_size</a>(fifo),</div>
<div class="line"><a name="l00609"></a><span class="lineno"> 609</span>  output_codec_context-><a class="code" href="structAVCodecContext.html#aec57f0d859a6df8b479cd93ca3a44a33">frame_size</a>);</div>
<div class="line"><a name="l00610"></a><span class="lineno"> 610</span>  <span class="keywordtype">int</span> data_written;</div>
<div class="line"><a name="l00611"></a><span class="lineno"> 611</span> <span class="comment"></span></div>
<div class="line"><a name="l00612"></a><span class="lineno"> 612</span> <span class="comment"> /** Initialize temporary storage for one output frame. */</span></div>
<div class="line"><a name="l00613"></a><span class="lineno"> 613</span>  <span class="keywordflow">if</span> (<a class="code" href="transcode__aac_8c.html#a72741423006b4ab38bf924fa567e7081">init_output_frame</a>(&output_frame, output_codec_context, frame_size))</div>
<div class="line"><a name="l00614"></a><span class="lineno"> 614</span>  <span class="keywordflow">return</span> <a class="code" href="group__lavu__error.html#ga334ea23fd9e492cd0e718330f2353b6b">AVERROR_EXIT</a>;</div>
<div class="line"><a name="l00615"></a><span class="lineno"> 615</span> <span class="comment"></span></div>
<div class="line"><a name="l00616"></a><span class="lineno"> 616</span> <span class="comment"> /**</span></div>
<div class="line"><a name="l00617"></a><span class="lineno"> 617</span> <span class="comment"> * Read as many samples from the FIFO buffer as required to fill the frame.</span></div>
<div class="line"><a name="l00618"></a><span class="lineno"> 618</span> <span class="comment"> * The samples are stored in the frame temporarily.</span></div>
<div class="line"><a name="l00619"></a><span class="lineno"> 619</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00620"></a><span class="lineno"> 620</span>  <span class="keywordflow">if</span> (<a class="code" href="group__lavu__audiofifo.html#gab256fc29188d91311bd2fbd78eb356af">av_audio_fifo_read</a>(fifo, (<span class="keywordtype">void</span> **)output_frame-><a class="code" href="structAVFrame.html#a1d0f65014a8d1bf78cec8cbed2304992">data</a>, frame_size) < frame_size) {</div>
<div class="line"><a name="l00621"></a><span class="lineno"> 621</span>  fprintf(stderr, <span class="stringliteral">"Could not read data from FIFO\n"</span>);</div>
<div class="line"><a name="l00622"></a><span class="lineno"> 622</span>  <a class="code" href="group__lavu__frame.html#ga979d73f3228814aee56aeca0636e37cc">av_frame_free</a>(&output_frame);</div>
<div class="line"><a name="l00623"></a><span class="lineno"> 623</span>  <span class="keywordflow">return</span> <a class="code" href="group__lavu__error.html#ga334ea23fd9e492cd0e718330f2353b6b">AVERROR_EXIT</a>;</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> <span class="comment"></span></div>
<div class="line"><a name="l00626"></a><span class="lineno"> 626</span> <span class="comment"> /** Encode one frame worth of audio samples. */</span></div>
<div class="line"><a name="l00627"></a><span class="lineno"> 627</span>  <span class="keywordflow">if</span> (<a class="code" href="transcode__aac_8c.html#a3d408f21612691f8c93a7aa24ea554ef">encode_audio_frame</a>(output_frame, output_format_context,</div>
<div class="line"><a name="l00628"></a><span class="lineno"> 628</span>  output_codec_context, &data_written)) {</div>
<div class="line"><a name="l00629"></a><span class="lineno"> 629</span>  <a class="code" href="group__lavu__frame.html#ga979d73f3228814aee56aeca0636e37cc">av_frame_free</a>(&output_frame);</div>
<div class="line"><a name="l00630"></a><span class="lineno"> 630</span>  <span class="keywordflow">return</span> <a class="code" href="group__lavu__error.html#ga334ea23fd9e492cd0e718330f2353b6b">AVERROR_EXIT</a>;</div>
<div class="line"><a name="l00631"></a><span class="lineno"> 631</span>  }</div>
<div class="line"><a name="l00632"></a><span class="lineno"> 632</span>  <a class="code" href="group__lavu__frame.html#ga979d73f3228814aee56aeca0636e37cc">av_frame_free</a>(&output_frame);</div>
<div class="line"><a name="l00633"></a><span class="lineno"> 633</span>  <span class="keywordflow">return</span> 0;</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"></span></div>
<div class="line"><a name="l00636"></a><span class="lineno"> 636</span> <span class="comment">/** Write the trailer of the output file container. */</span></div>
<div class="line"><a name="l00637"></a><span class="lineno"><a class="line" href="transcode__aac_8c.html#aea497107d8d2a7a1e5bf92422ccc6715"> 637</a></span> <span class="keyword">static</span> <span class="keywordtype">int</span> <a class="code" href="transcode__aac_8c.html#aea497107d8d2a7a1e5bf92422ccc6715">write_output_file_trailer</a>(<a class="code" href="structAVFormatContext.html">AVFormatContext</a> *output_format_context)</div>
<div class="line"><a name="l00638"></a><span class="lineno"> 638</span> {</div>
<div class="line"><a name="l00639"></a><span class="lineno"> 639</span>  <span class="keywordtype">int</span> error;</div>
<div class="line"><a name="l00640"></a><span class="lineno"> 640</span>  <span class="keywordflow">if</span> ((error = <a class="code" href="group__lavf__encoding.html#ga7f14007e7dc8f481f054b21614dfec13">av_write_trailer</a>(output_format_context)) < 0) {</div>
<div class="line"><a name="l00641"></a><span class="lineno"> 641</span>  fprintf(stderr, <span class="stringliteral">"Could not write output file trailer (error '%s')\n"</span>,</div>
<div class="line"><a name="l00642"></a><span class="lineno"> 642</span>  <a class="code" href="transcode__aac_8c.html#adc7cf4c70d2850aecf8c9997a350147c">get_error_text</a>(error));</div>
<div class="line"><a name="l00643"></a><span class="lineno"> 643</span>  <span class="keywordflow">return</span> error;</div>
<div class="line"><a name="l00644"></a><span class="lineno"> 644</span>  }</div>
<div class="line"><a name="l00645"></a><span class="lineno"> 645</span>  <span class="keywordflow">return</span> 0;</div>
<div class="line"><a name="l00646"></a><span class="lineno"> 646</span> }</div>
<div class="line"><a name="l00647"></a><span class="lineno"> 647</span> <span class="comment"></span></div>
<div class="line"><a name="l00648"></a><span class="lineno"> 648</span> <span class="comment">/** Convert an audio file to an AAC file in an MP4 container. */</span></div>
<div class="line"><a name="l00649"></a><span class="lineno"><a class="line" href="transcode__aac_8c.html#a3c04138a5bfe5d72780bb7e82a18e627"> 649</a></span> <span class="keywordtype">int</span> <a class="code" href="transcode__aac_8c.html#a3c04138a5bfe5d72780bb7e82a18e627">main</a>(<span class="keywordtype">int</span> argc, <span class="keywordtype">char</span> **argv)</div>
<div class="line"><a name="l00650"></a><span class="lineno"> 650</span> {</div>
<div class="line"><a name="l00651"></a><span class="lineno"> 651</span>  <a class="code" href="structAVFormatContext.html">AVFormatContext</a> *input_format_context = NULL, *output_format_context = NULL;</div>
<div class="line"><a name="l00652"></a><span class="lineno"> 652</span>  <a class="code" href="structAVCodecContext.html">AVCodecContext</a> *input_codec_context = NULL, *output_codec_context = NULL;</div>
<div class="line"><a name="l00653"></a><span class="lineno"> 653</span>  <a class="code" href="group__lswr.html#ga4aa775b7fba31d2c8dc14c7b7e282863">SwrContext</a> *resample_context = NULL;</div>
<div class="line"><a name="l00654"></a><span class="lineno"> 654</span>  <a class="code" href="group__lavu__audiofifo.html#ga328abb21e9abb2c455d2d9c212d5230f">AVAudioFifo</a> *fifo = NULL;</div>
<div class="line"><a name="l00655"></a><span class="lineno"> 655</span>  <span class="keywordtype">int</span> ret = <a class="code" href="group__lavu__error.html#ga334ea23fd9e492cd0e718330f2353b6b">AVERROR_EXIT</a>;</div>
<div class="line"><a name="l00656"></a><span class="lineno"> 656</span> </div>
<div class="line"><a name="l00657"></a><span class="lineno"> 657</span>  <span class="keywordflow">if</span> (argc < 3) {</div>
<div class="line"><a name="l00658"></a><span class="lineno"> 658</span>  fprintf(stderr, <span class="stringliteral">"Usage: %s <input file> <output file>\n"</span>, argv[0]);</div>
<div class="line"><a name="l00659"></a><span class="lineno"> 659</span>  exit(1);</div>
<div class="line"><a name="l00660"></a><span class="lineno"> 660</span>  }</div>
<div class="line"><a name="l00661"></a><span class="lineno"> 661</span> <span class="comment"></span></div>
<div class="line"><a name="l00662"></a><span class="lineno"> 662</span> <span class="comment"> /** Register all codecs and formats so that they can be used. */</span></div>
<div class="line"><a name="l00663"></a><span class="lineno"> 663</span>  <a class="code" href="group__lavf__core.html#ga917265caec45ef5a0646356ed1a507e3">av_register_all</a>();<span class="comment"></span></div>
<div class="line"><a name="l00664"></a><span class="lineno"> 664</span> <span class="comment"> /** Open the input file for reading. */</span></div>
<div class="line"><a name="l00665"></a><span class="lineno"> 665</span>  <span class="keywordflow">if</span> (<a class="code" href="transcode__aac_8c.html#a8103e36bb4cb4141ee5e25acc350bc0b">open_input_file</a>(argv[1], &input_format_context,</div>
<div class="line"><a name="l00666"></a><span class="lineno"> 666</span>  &input_codec_context))</div>
<div class="line"><a name="l00667"></a><span class="lineno"> 667</span>  <span class="keywordflow">goto</span> cleanup;<span class="comment"></span></div>
<div class="line"><a name="l00668"></a><span class="lineno"> 668</span> <span class="comment"> /** Open the output file for writing. */</span></div>
<div class="line"><a name="l00669"></a><span class="lineno"> 669</span>  <span class="keywordflow">if</span> (<a class="code" href="transcode__aac_8c.html#a617f4760254c119fc7caa222f3fcbd21">open_output_file</a>(argv[2], input_codec_context,</div>
<div class="line"><a name="l00670"></a><span class="lineno"> 670</span>  &output_format_context, &output_codec_context))</div>
<div class="line"><a name="l00671"></a><span class="lineno"> 671</span>  <span class="keywordflow">goto</span> cleanup;<span class="comment"></span></div>
<div class="line"><a name="l00672"></a><span class="lineno"> 672</span> <span class="comment"> /** Initialize the resampler to be able to convert audio sample formats. */</span></div>
<div class="line"><a name="l00673"></a><span class="lineno"> 673</span>  <span class="keywordflow">if</span> (<a class="code" href="transcode__aac_8c.html#a68b32c4f40838cc56a7f45d33286d039">init_resampler</a>(input_codec_context, output_codec_context,</div>
<div class="line"><a name="l00674"></a><span class="lineno"> 674</span>  &resample_context))</div>
<div class="line"><a name="l00675"></a><span class="lineno"> 675</span>  <span class="keywordflow">goto</span> cleanup;<span class="comment"></span></div>
<div class="line"><a name="l00676"></a><span class="lineno"> 676</span> <span class="comment"> /** Initialize the FIFO buffer to store audio samples to be encoded. */</span></div>
<div class="line"><a name="l00677"></a><span class="lineno"> 677</span>  <span class="keywordflow">if</span> (<a class="code" href="transcode__aac_8c.html#a96cd24fde0bde66e80f3141a1def94c6">init_fifo</a>(&fifo, output_codec_context))</div>
<div class="line"><a name="l00678"></a><span class="lineno"> 678</span>  <span class="keywordflow">goto</span> cleanup;<span class="comment"></span></div>
<div class="line"><a name="l00679"></a><span class="lineno"> 679</span> <span class="comment"> /** Write the header of the output file container. */</span></div>
<div class="line"><a name="l00680"></a><span class="lineno"> 680</span>  <span class="keywordflow">if</span> (<a class="code" href="transcode__aac_8c.html#a717f7868fc24543151cb94b307e87420">write_output_file_header</a>(output_format_context))</div>
<div class="line"><a name="l00681"></a><span class="lineno"> 681</span>  <span class="keywordflow">goto</span> cleanup;</div>
<div class="line"><a name="l00682"></a><span class="lineno"> 682</span> <span class="comment"></span></div>
<div class="line"><a name="l00683"></a><span class="lineno"> 683</span> <span class="comment"> /**</span></div>
<div class="line"><a name="l00684"></a><span class="lineno"> 684</span> <span class="comment"> * Loop as long as we have input samples to read or output samples</span></div>
<div class="line"><a name="l00685"></a><span class="lineno"> 685</span> <span class="comment"> * to write; abort as soon as we have neither.</span></div>
<div class="line"><a name="l00686"></a><span class="lineno"> 686</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00687"></a><span class="lineno"> 687</span>  <span class="keywordflow">while</span> (1) {<span class="comment"></span></div>
<div class="line"><a name="l00688"></a><span class="lineno"> 688</span> <span class="comment"> /** Use the encoder's desired frame size for processing. */</span></div>
<div class="line"><a name="l00689"></a><span class="lineno"> 689</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> output_frame_size = output_codec_context->frame_size;</div>
<div class="line"><a name="l00690"></a><span class="lineno"> 690</span>  <span class="keywordtype">int</span> finished = 0;</div>
<div class="line"><a name="l00691"></a><span class="lineno"> 691</span> <span class="comment"></span></div>
<div class="line"><a name="l00692"></a><span class="lineno"> 692</span> <span class="comment"> /**</span></div>
<div class="line"><a name="l00693"></a><span class="lineno"> 693</span> <span class="comment"> * Make sure that there is one frame worth of samples in the FIFO</span></div>
<div class="line"><a name="l00694"></a><span class="lineno"> 694</span> <span class="comment"> * buffer so that the encoder can do its work.</span></div>
<div class="line"><a name="l00695"></a><span class="lineno"> 695</span> <span class="comment"> * Since the decoder's and the encoder's frame size may differ, we</span></div>
<div class="line"><a name="l00696"></a><span class="lineno"> 696</span> <span class="comment"> * need to FIFO buffer to store as many frames worth of input samples</span></div>
<div class="line"><a name="l00697"></a><span class="lineno"> 697</span> <span class="comment"> * that they make up at least one frame worth of output samples.</span></div>
<div class="line"><a name="l00698"></a><span class="lineno"> 698</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00699"></a><span class="lineno"> 699</span>  <span class="keywordflow">while</span> (<a class="code" href="group__lavu__audiofifo.html#gaa0a4742ecac52a999e8b4478d27f3b9b">av_audio_fifo_size</a>(fifo) < output_frame_size) {<span class="comment"></span></div>
<div class="line"><a name="l00700"></a><span class="lineno"> 700</span> <span class="comment"> /**</span></div>
<div class="line"><a name="l00701"></a><span class="lineno"> 701</span> <span class="comment"> * Decode one frame worth of audio samples, convert it to the</span></div>
<div class="line"><a name="l00702"></a><span class="lineno"> 702</span> <span class="comment"> * output sample format and put it into the FIFO buffer.</span></div>
<div class="line"><a name="l00703"></a><span class="lineno"> 703</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00704"></a><span class="lineno"> 704</span>  <span class="keywordflow">if</span> (<a class="code" href="transcode__aac_8c.html#a7f6cf47c64ae78cbdad6115e57aa2c2f">read_decode_convert_and_store</a>(fifo, input_format_context,</div>
<div class="line"><a name="l00705"></a><span class="lineno"> 705</span>  input_codec_context,</div>
<div class="line"><a name="l00706"></a><span class="lineno"> 706</span>  output_codec_context,</div>
<div class="line"><a name="l00707"></a><span class="lineno"> 707</span>  resample_context, &finished))</div>
<div class="line"><a name="l00708"></a><span class="lineno"> 708</span>  <span class="keywordflow">goto</span> cleanup;</div>
<div class="line"><a name="l00709"></a><span class="lineno"> 709</span> <span class="comment"></span></div>
<div class="line"><a name="l00710"></a><span class="lineno"> 710</span> <span class="comment"> /**</span></div>
<div class="line"><a name="l00711"></a><span class="lineno"> 711</span> <span class="comment"> * If we are at the end of the input file, we continue</span></div>
<div class="line"><a name="l00712"></a><span class="lineno"> 712</span> <span class="comment"> * encoding the remaining audio samples to the output file.</span></div>
<div class="line"><a name="l00713"></a><span class="lineno"> 713</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00714"></a><span class="lineno"> 714</span>  <span class="keywordflow">if</span> (finished)</div>
<div class="line"><a name="l00715"></a><span class="lineno"> 715</span>  <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00716"></a><span class="lineno"> 716</span>  }</div>
<div class="line"><a name="l00717"></a><span class="lineno"> 717</span> <span class="comment"></span></div>
<div class="line"><a name="l00718"></a><span class="lineno"> 718</span> <span class="comment"> /**</span></div>
<div class="line"><a name="l00719"></a><span class="lineno"> 719</span> <span class="comment"> * If we have enough samples for the encoder, we encode them.</span></div>
<div class="line"><a name="l00720"></a><span class="lineno"> 720</span> <span class="comment"> * At the end of the file, we pass the remaining samples to</span></div>
<div class="line"><a name="l00721"></a><span class="lineno"> 721</span> <span class="comment"> * the encoder.</span></div>
<div class="line"><a name="l00722"></a><span class="lineno"> 722</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00723"></a><span class="lineno"> 723</span>  <span class="keywordflow">while</span> (<a class="code" href="group__lavu__audiofifo.html#gaa0a4742ecac52a999e8b4478d27f3b9b">av_audio_fifo_size</a>(fifo) >= output_frame_size ||</div>
<div class="line"><a name="l00724"></a><span class="lineno"> 724</span>  (finished && <a class="code" href="group__lavu__audiofifo.html#gaa0a4742ecac52a999e8b4478d27f3b9b">av_audio_fifo_size</a>(fifo) > 0))<span class="comment"></span></div>
<div class="line"><a name="l00725"></a><span class="lineno"> 725</span> <span class="comment"> /**</span></div>
<div class="line"><a name="l00726"></a><span class="lineno"> 726</span> <span class="comment"> * Take one frame worth of audio samples from the FIFO buffer,</span></div>
<div class="line"><a name="l00727"></a><span class="lineno"> 727</span> <span class="comment"> * encode it and write it to the output file.</span></div>
<div class="line"><a name="l00728"></a><span class="lineno"> 728</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00729"></a><span class="lineno"> 729</span>  <span class="keywordflow">if</span> (<a class="code" href="transcode__aac_8c.html#ab4367e0049c0bbd56eec8c525cdbd6e5">load_encode_and_write</a>(fifo, output_format_context,</div>
<div class="line"><a name="l00730"></a><span class="lineno"> 730</span>  output_codec_context))</div>
<div class="line"><a name="l00731"></a><span class="lineno"> 731</span>  <span class="keywordflow">goto</span> cleanup;</div>
<div class="line"><a name="l00732"></a><span class="lineno"> 732</span> <span class="comment"></span></div>
<div class="line"><a name="l00733"></a><span class="lineno"> 733</span> <span class="comment"> /**</span></div>
<div class="line"><a name="l00734"></a><span class="lineno"> 734</span> <span class="comment"> * If we are at the end of the input file and have encoded</span></div>
<div class="line"><a name="l00735"></a><span class="lineno"> 735</span> <span class="comment"> * all remaining samples, we can exit this loop and finish.</span></div>
<div class="line"><a name="l00736"></a><span class="lineno"> 736</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00737"></a><span class="lineno"> 737</span>  <span class="keywordflow">if</span> (finished) {</div>
<div class="line"><a name="l00738"></a><span class="lineno"> 738</span>  <span class="keywordtype">int</span> data_written;<span class="comment"></span></div>
<div class="line"><a name="l00739"></a><span class="lineno"> 739</span> <span class="comment"> /** Flush the encoder as it may have delayed frames. */</span></div>
<div class="line"><a name="l00740"></a><span class="lineno"> 740</span>  <span class="keywordflow">do</span> {</div>
<div class="line"><a name="l00741"></a><span class="lineno"> 741</span>  <span class="keywordflow">if</span> (<a class="code" href="transcode__aac_8c.html#a3d408f21612691f8c93a7aa24ea554ef">encode_audio_frame</a>(NULL, output_format_context,</div>
<div class="line"><a name="l00742"></a><span class="lineno"> 742</span>  output_codec_context, &data_written))</div>
<div class="line"><a name="l00743"></a><span class="lineno"> 743</span>  <span class="keywordflow">goto</span> cleanup;</div>
<div class="line"><a name="l00744"></a><span class="lineno"> 744</span>  } <span class="keywordflow">while</span> (data_written);</div>
<div class="line"><a name="l00745"></a><span class="lineno"> 745</span>  <span class="keywordflow">break</span>;</div>
<div class="line"><a name="l00746"></a><span class="lineno"> 746</span>  }</div>
<div class="line"><a name="l00747"></a><span class="lineno"> 747</span>  }</div>
<div class="line"><a name="l00748"></a><span class="lineno"> 748</span> <span class="comment"></span></div>
<div class="line"><a name="l00749"></a><span class="lineno"> 749</span> <span class="comment"> /** Write the trailer of the output file container. */</span></div>
<div class="line"><a name="l00750"></a><span class="lineno"> 750</span>  <span class="keywordflow">if</span> (<a class="code" href="transcode__aac_8c.html#aea497107d8d2a7a1e5bf92422ccc6715">write_output_file_trailer</a>(output_format_context))</div>
<div class="line"><a name="l00751"></a><span class="lineno"> 751</span>  <span class="keywordflow">goto</span> cleanup;</div>
<div class="line"><a name="l00752"></a><span class="lineno"> 752</span>  ret = 0;</div>
<div class="line"><a name="l00753"></a><span class="lineno"> 753</span> </div>
<div class="line"><a name="l00754"></a><span class="lineno"> 754</span> cleanup:</div>
<div class="line"><a name="l00755"></a><span class="lineno"> 755</span>  <span class="keywordflow">if</span> (fifo)</div>
<div class="line"><a name="l00756"></a><span class="lineno"> 756</span>  <a class="code" href="group__lavu__audiofifo.html#ga74e029e47f7aa99217ad1f315c434875">av_audio_fifo_free</a>(fifo);</div>
<div class="line"><a name="l00757"></a><span class="lineno"> 757</span>  <a class="code" href="group__lswr.html#ga818f7d78b1ad7d8d5b70de374b668c34">swr_free</a>(&resample_context);</div>
<div class="line"><a name="l00758"></a><span class="lineno"> 758</span>  <span class="keywordflow">if</span> (output_codec_context)</div>
<div class="line"><a name="l00759"></a><span class="lineno"> 759</span>  <a class="code" href="group__lavc__core.html#gaf4daa92361efb3523ef5afeb0b54077f">avcodec_close</a>(output_codec_context);</div>
<div class="line"><a name="l00760"></a><span class="lineno"> 760</span>  <span class="keywordflow">if</span> (output_format_context) {</div>
<div class="line"><a name="l00761"></a><span class="lineno"> 761</span>  <a class="code" href="avio_8h.html#ae118a1f37f1e48617609ead9910aac15">avio_closep</a>(&output_format_context->pb);</div>
<div class="line"><a name="l00762"></a><span class="lineno"> 762</span>  <a class="code" href="group__lavf__core.html#gac2990b13b68e831a408fce8e1d0d6445">avformat_free_context</a>(output_format_context);</div>
<div class="line"><a name="l00763"></a><span class="lineno"> 763</span>  }</div>
<div class="line"><a name="l00764"></a><span class="lineno"> 764</span>  <span class="keywordflow">if</span> (input_codec_context)</div>
<div class="line"><a name="l00765"></a><span class="lineno"> 765</span>  <a class="code" href="group__lavc__core.html#gaf4daa92361efb3523ef5afeb0b54077f">avcodec_close</a>(input_codec_context);</div>
<div class="line"><a name="l00766"></a><span class="lineno"> 766</span>  <span class="keywordflow">if</span> (input_format_context)</div>
<div class="line"><a name="l00767"></a><span class="lineno"> 767</span>  <a class="code" href="group__lavf__decoding.html#gae804b99aec044690162b8b9b110236a4">avformat_close_input</a>(&input_format_context);</div>
<div class="line"><a name="l00768"></a><span class="lineno"> 768</span> </div>
<div class="line"><a name="l00769"></a><span class="lineno"> 769</span>  <span class="keywordflow">return</span> ret;</div>
<div class="line"><a name="l00770"></a><span class="lineno"> 770</span> }</div>
<div class="ttc" id="avio_8h_html_a371a670112abc5f3e15bc570da076301"><div class="ttname"><a href="avio_8h.html#a371a670112abc5f3e15bc570da076301">avio_open</a></div><div class="ttdeci">int avio_open(AVIOContext **s, const char *url, int flags)</div><div class="ttdoc">Create and initialize a AVIOContext for accessing the resource indicated by url. </div></div>
<div class="ttc" id="avcodec_8h_html_a0e9f40024e3b017088ee1c16f25b3910"><div class="ttname"><a href="avcodec_8h.html#a0e9f40024e3b017088ee1c16f25b3910">FF_COMPLIANCE_EXPERIMENTAL</a></div><div class="ttdeci">#define FF_COMPLIANCE_EXPERIMENTAL</div><div class="ttdoc">Allow nonstandardized experimental things. </div><div class="ttdef"><b>Definition:</b> <a href="avcodec_8h_source.html#l02746">avcodec.h:2746</a></div></div>
<div class="ttc" id="structAVCodecContext_html_a6e606effa68724cae2ef5cc05f7fd9cb"><div class="ttname"><a href="structAVCodecContext.html#a6e606effa68724cae2ef5cc05f7fd9cb">AVCodecContext::codec</a></div><div class="ttdeci">const struct AVCodec * codec</div><div class="ttdef"><b>Definition:</b> <a href="avcodec_8h_source.html#l01541">avcodec.h:1541</a></div></div>
<div class="ttc" id="structAVIOContext_html"><div class="ttname"><a href="structAVIOContext.html">AVIOContext</a></div><div class="ttdoc">Bytestream IO Context. </div><div class="ttdef"><b>Definition:</b> <a href="avio_8h_source.html#l00111">avio.h:111</a></div></div>
<div class="ttc" id="group__lavu__audiofifo_html_ga9d792394f0615a329aec47847f8f8784"><div class="ttname"><a href="group__lavu__audiofifo.html#ga9d792394f0615a329aec47847f8f8784">av_audio_fifo_alloc</a></div><div class="ttdeci">AVAudioFifo * av_audio_fifo_alloc(enum AVSampleFormat sample_fmt, int channels, int nb_samples)</div><div class="ttdoc">Allocate an AVAudioFifo. </div></div>
<div class="ttc" id="avio_8h_html"><div class="ttname"><a href="avio_8h.html">avio.h</a></div><div class="ttdoc">Buffered I/O operations. </div></div>
<div class="ttc" id="group__lavu__audiofifo_html_gab256fc29188d91311bd2fbd78eb356af"><div class="ttname"><a href="group__lavu__audiofifo.html#gab256fc29188d91311bd2fbd78eb356af">av_audio_fifo_read</a></div><div class="ttdeci">int av_audio_fifo_read(AVAudioFifo *af, void **data, int nb_samples)</div><div class="ttdoc">Read data from an AVAudioFifo. </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="transcode__aac_8c_html_a3c04138a5bfe5d72780bb7e82a18e627"><div class="ttname"><a href="transcode__aac_8c.html#a3c04138a5bfe5d72780bb7e82a18e627">main</a></div><div class="ttdeci">int main(int argc, char **argv)</div><div class="ttdoc">Convert an audio file to an AAC file in an MP4 container. </div><div class="ttdef"><b>Definition:</b> <a href="transcode__aac_8c_source.html#l00649">transcode_aac.c:649</a></div></div>
<div class="ttc" id="group__lavf__encoding_html_gaa85cc1774f18f306cd20a40fc50d0b36"><div class="ttname"><a href="group__lavf__encoding.html#gaa85cc1774f18f306cd20a40fc50d0b36">av_write_frame</a></div><div class="ttdeci">int av_write_frame(AVFormatContext *s, AVPacket *pkt)</div><div class="ttdoc">Write a packet to an output media file. </div></div>
<div class="ttc" id="group__lavu__audiofifo_html_ga74e029e47f7aa99217ad1f315c434875"><div class="ttname"><a href="group__lavu__audiofifo.html#ga74e029e47f7aa99217ad1f315c434875">av_audio_fifo_free</a></div><div class="ttdeci">void av_audio_fifo_free(AVAudioFifo *af)</div><div class="ttdoc">Free an AVAudioFifo. </div></div>
<div class="ttc" id="structAVRational_html_ae9a98c10a301c5e937095105b6f0fdb9"><div class="ttname"><a href="structAVRational.html#ae9a98c10a301c5e937095105b6f0fdb9">AVRational::num</a></div><div class="ttdeci">int num</div><div class="ttdoc">numerator </div><div class="ttdef"><b>Definition:</b> <a href="rational_8h_source.html#l00044">rational.h:44</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="avio_8h_html_a5c9308f296545a8f3b7687d277a6dabc"><div class="ttname"><a href="avio_8h.html#a5c9308f296545a8f3b7687d277a6dabc">AVIO_FLAG_WRITE</a></div><div class="ttdeci">#define AVIO_FLAG_WRITE</div><div class="ttdoc">write-only </div><div class="ttdef"><b>Definition:</b> <a href="avio_8h_source.html#l00538">avio.h:538</a></div></div>
<div class="ttc" id="avstring_8h_html"><div class="ttname"><a href="avstring_8h.html">avstring.h</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="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="transcode__aac_8c_html_a0b457785184f97c7169f9c1c05736990"><div class="ttname"><a href="transcode__aac_8c.html#a0b457785184f97c7169f9c1c05736990">init_packet</a></div><div class="ttdeci">static void init_packet(AVPacket *packet)</div><div class="ttdoc">Initialize one data packet for reading or writing. </div><div class="ttdef"><b>Definition:</b> <a href="transcode__aac_8c_source.html#l00214">transcode_aac.c:214</a></div></div>
<div class="ttc" id="transcode__aac_8c_html_a68b32c4f40838cc56a7f45d33286d039"><div class="ttname"><a href="transcode__aac_8c.html#a68b32c4f40838cc56a7f45d33286d039">init_resampler</a></div><div class="ttdeci">static int init_resampler(AVCodecContext *input_codec_context, AVCodecContext *output_codec_context, SwrContext **resample_context)</div><div class="ttdoc">Initialize the audio resampler based on the input and output codec settings. </div><div class="ttdef"><b>Definition:</b> <a href="transcode__aac_8c_source.html#l00237">transcode_aac.c:237</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="transcode__aac_8c_html_a8103e36bb4cb4141ee5e25acc350bc0b"><div class="ttname"><a href="transcode__aac_8c.html#a8103e36bb4cb4141ee5e25acc350bc0b">open_input_file</a></div><div class="ttdeci">static int open_input_file(const char *filename, AVFormatContext **input_format_context, AVCodecContext **input_codec_context)</div><div class="ttdoc">Open an input file and the required decoder. </div><div class="ttdef"><b>Definition:</b> <a href="transcode__aac_8c_source.html#l00061">transcode_aac.c:61</a></div></div>
<div class="ttc" id="structAVFormatContext_html"><div class="ttname"><a href="structAVFormatContext.html">AVFormatContext</a></div><div class="ttdoc">Format I/O context. </div><div class="ttdef"><b>Definition:</b> <a href="avformat_8h_source.html#l01314">avformat.h:1314</a></div></div>
<div class="ttc" id="transcode__aac_8c_html_a3d408f21612691f8c93a7aa24ea554ef"><div class="ttname"><a href="transcode__aac_8c.html#a3d408f21612691f8c93a7aa24ea554ef">encode_audio_frame</a></div><div class="ttdeci">static int encode_audio_frame(AVFrame *frame, AVFormatContext *output_format_context, AVCodecContext *output_codec_context, int *data_present)</div><div class="ttdoc">Encode one frame worth of audio to the output file. </div><div class="ttdef"><b>Definition:</b> <a href="transcode__aac_8c_source.html#l00550">transcode_aac.c:550</a></div></div>
<div class="ttc" id="avassert_8h_html_aae204192396f78cc8c5cd7ad5c57c23f"><div class="ttname"><a href="avassert_8h.html#aae204192396f78cc8c5cd7ad5c57c23f">av_assert0</a></div><div class="ttdeci">#define av_assert0(cond)</div><div class="ttdoc">assert() equivalent, that is always enabled. </div><div class="ttdef"><b>Definition:</b> <a href="avassert_8h_source.html#l00037">avassert.h:37</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="transcode__aac_8c_html_a7f6cf47c64ae78cbdad6115e57aa2c2f"><div class="ttname"><a href="transcode__aac_8c.html#a7f6cf47c64ae78cbdad6115e57aa2c2f">read_decode_convert_and_store</a></div><div class="ttdeci">static int read_decode_convert_and_store(AVAudioFifo *fifo, AVFormatContext *input_format_context, AVCodecContext *input_codec_context, AVCodecContext *output_codec_context, SwrContext *resampler_context, int *finished)</div><div class="ttdoc">Read one audio frame from the input file, decodes, converts and stores it in the FIFO buffer...</div><div class="ttdef"><b>Definition:</b> <a href="transcode__aac_8c_source.html#l00441">transcode_aac.c:441</a></div></div>
<div class="ttc" id="group__lavc__core_html_ggaadca229ad2c20e060a14fec08a5cc7ceaadba4b5a087e2b6bf2acdd1b5aebb988"><div class="ttname"><a href="group__lavc__core.html#ggaadca229ad2c20e060a14fec08a5cc7ceaadba4b5a087e2b6bf2acdd1b5aebb988">AV_CODEC_ID_AAC</a></div><div class="ttdef"><b>Definition:</b> <a href="avcodec_8h_source.html#l00421">avcodec.h:421</a></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="transcode__aac_8c_html_af01916898adcdf3776690407bd1e2b82"><div class="ttname"><a href="transcode__aac_8c.html#af01916898adcdf3776690407bd1e2b82">convert_samples</a></div><div class="ttdeci">static int convert_samples(const uint8_t **input_data, uint8_t **converted_data, const int frame_size, SwrContext *resample_context)</div><div class="ttdoc">Convert the input audio samples into the output sample format. </div><div class="ttdef"><b>Definition:</b> <a href="transcode__aac_8c_source.html#l00394">transcode_aac.c:394</a></div></div>
<div class="ttc" id="group__lavf__core_html_gadcb0fd3e507d9b58fe78f61f8ad39827"><div class="ttname"><a href="group__lavf__core.html#gadcb0fd3e507d9b58fe78f61f8ad39827">avformat_new_stream</a></div><div class="ttdeci">AVStream * avformat_new_stream(AVFormatContext *s, const AVCodec *c)</div><div class="ttdoc">Add a new stream to a media file. </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="group__lavf__core_html_gac7a91abf2f59648d995894711f070f62"><div class="ttname"><a href="group__lavf__core.html#gac7a91abf2f59648d995894711f070f62">avformat_alloc_context</a></div><div class="ttdeci">AVFormatContext * avformat_alloc_context(void)</div><div class="ttdoc">Allocate an AVFormatContext. </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="group__lswr_html_gaa5bb6cab830146efa8c760fa66ee582a"><div class="ttname"><a href="group__lswr.html#gaa5bb6cab830146efa8c760fa66ee582a">swr_convert</a></div><div class="ttdeci">int swr_convert(struct SwrContext *s, uint8_t **out, int out_count, const uint8_t **in, int in_count)</div><div class="ttdoc">Convert audio. </div></div>
<div class="ttc" id="group__lavu__error_html_gab4faa0afdf35076914824200331defff"><div class="ttname"><a href="group__lavu__error.html#gab4faa0afdf35076914824200331defff">AVERROR_EOF</a></div><div class="ttdeci">#define AVERROR_EOF</div><div class="ttdoc">End of file. </div><div class="ttdef"><b>Definition:</b> <a href="error_8h_source.html#l00055">error.h:55</a></div></div>
<div class="ttc" id="transcode__aac_8c_html_a399b9ea45bcc6b114a3e0bef1c743a60"><div class="ttname"><a href="transcode__aac_8c.html#a399b9ea45bcc6b114a3e0bef1c743a60">init_input_frame</a></div><div class="ttdeci">static int init_input_frame(AVFrame **frame)</div><div class="ttdoc">Initialize one audio frame for reading from the input file. </div><div class="ttdef"><b>Definition:</b> <a href="transcode__aac_8c_source.html#l00223">transcode_aac.c:223</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="swresample_8h_html"><div class="ttname"><a href="swresample_8h.html">swresample.h</a></div><div class="ttdoc">libswresample public header </div></div>
<div class="ttc" id="transcode__aac_8c_html_a717f7868fc24543151cb94b307e87420"><div class="ttname"><a href="transcode__aac_8c.html#a717f7868fc24543151cb94b307e87420">write_output_file_header</a></div><div class="ttdeci">static int write_output_file_header(AVFormatContext *output_format_context)</div><div class="ttdoc">Write the header of the output file container. </div><div class="ttdef"><b>Definition:</b> <a href="transcode__aac_8c_source.html#l00291">transcode_aac.c:291</a></div></div>
<div class="ttc" id="group__lavu__error_html_gae4bb6f165973d09584e0ec0f335f69ca"><div class="ttname"><a href="group__lavu__error.html#gae4bb6f165973d09584e0ec0f335f69ca">AVERROR</a></div><div class="ttdeci">#define AVERROR(e)</div><div class="ttdef"><b>Definition:</b> <a href="error_8h_source.html#l00043">error.h:43</a></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="avassert_8h_html"><div class="ttname"><a href="avassert_8h.html">avassert.h</a></div><div class="ttdoc">simple assert() macros that are a bit more flexible than ISO C assert(). </div></div>
<div class="ttc" id="group__lavu__audiofifo_html_ga328abb21e9abb2c455d2d9c212d5230f"><div class="ttname"><a href="group__lavu__audiofifo.html#ga328abb21e9abb2c455d2d9c212d5230f">AVAudioFifo</a></div><div class="ttdeci">struct AVAudioFifo AVAudioFifo</div><div class="ttdoc">Context for an Audio FIFO Buffer. </div><div class="ttdef"><b>Definition:</b> <a href="audio__fifo_8h_source.html#l00049">audio_fifo.h:49</a></div></div>
<div class="ttc" id="transcode__aac_8c_html_ab4367e0049c0bbd56eec8c525cdbd6e5"><div class="ttname"><a href="transcode__aac_8c.html#ab4367e0049c0bbd56eec8c525cdbd6e5">load_encode_and_write</a></div><div class="ttdeci">static int load_encode_and_write(AVAudioFifo *fifo, AVFormatContext *output_format_context, AVCodecContext *output_codec_context)</div><div class="ttdoc">Load one audio frame from the FIFO buffer, encode and write it to the output file. </div><div class="ttdef"><b>Definition:</b> <a href="transcode__aac_8c_source.html#l00597">transcode_aac.c:597</a></div></div>
<div class="ttc" id="group__lavu__string_html_ga716447ae73b612bcf3a405b9b4608f6c"><div class="ttname"><a href="group__lavu__string.html#ga716447ae73b612bcf3a405b9b4608f6c">av_strlcpy</a></div><div class="ttdeci">size_t av_strlcpy(char *dst, const char *src, size_t size)</div><div class="ttdoc">Copy the string src to dst, but no more than size - 1 bytes, and null-terminate dst. </div></div>
<div class="ttc" id="group__lswr_html_ga4aa775b7fba31d2c8dc14c7b7e282863"><div class="ttname"><a href="group__lswr.html#ga4aa775b7fba31d2c8dc14c7b7e282863">SwrContext</a></div><div class="ttdeci">struct SwrContext SwrContext</div><div class="ttdoc">The libswresample context. </div><div class="ttdef"><b>Definition:</b> <a href="swresample_8h_source.html#l00186">swresample.h:186</a></div></div>
<div class="ttc" id="frame_8h_html"><div class="ttname"><a href="frame_8h.html">frame.h</a></div><div class="ttdoc">reference-counted frame API </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="structAVStream_html_a56f20051fb99339cc588cd3a07ab8c96"><div class="ttname"><a href="structAVStream.html#a56f20051fb99339cc588cd3a07ab8c96">AVStream::codec</a></div><div class="ttdeci">AVCodecContext * codec</div><div class="ttdoc">Codec context associated with this stream. </div><div class="ttdef"><b>Definition:</b> <a href="avformat_8h_source.html#l00896">avformat.h:896</a></div></div>
<div class="ttc" id="group__lavu__audiofifo_html_gaa0a4742ecac52a999e8b4478d27f3b9b"><div class="ttname"><a href="group__lavu__audiofifo.html#gaa0a4742ecac52a999e8b4478d27f3b9b">av_audio_fifo_size</a></div><div class="ttdeci">int av_audio_fifo_size(AVAudioFifo *af)</div><div class="ttdoc">Get the current number of samples in the AVAudioFifo available for reading. </div></div>
<div class="ttc" id="group__lavu__audiofifo_html_ga27c1e16e5f09940d6016b1971c0b5742"><div class="ttname"><a href="group__lavu__audiofifo.html#ga27c1e16e5f09940d6016b1971c0b5742">av_audio_fifo_realloc</a></div><div class="ttdeci">av_warn_unused_result int av_audio_fifo_realloc(AVAudioFifo *af, int nb_samples)</div><div class="ttdoc">Reallocate an AVAudioFifo. </div></div>
<div class="ttc" id="group__lavf__encoding_html_ga18b7b10bb5b94c4842de18166bc677cb"><div class="ttname"><a href="group__lavf__encoding.html#ga18b7b10bb5b94c4842de18166bc677cb">avformat_write_header</a></div><div class="ttdeci">av_warn_unused_result int avformat_write_header(AVFormatContext *s, AVDictionary **options)</div><div class="ttdoc">Allocate the stream private data and write the stream header to an output media file. </div></div>
<div class="ttc" id="common_8h_html_a0f84cbd7fd810cd678157c98cbfad4b0"><div class="ttname"><a href="common_8h.html#a0f84cbd7fd810cd678157c98cbfad4b0">FFMIN</a></div><div class="ttdeci">#define FFMIN(a, b)</div><div class="ttdef"><b>Definition:</b> <a href="common_8h_source.html#l00096">common.h:96</a></div></div>
<div class="ttc" id="transcode__aac_8c_html_a617f4760254c119fc7caa222f3fcbd21"><div class="ttname"><a href="transcode__aac_8c.html#a617f4760254c119fc7caa222f3fcbd21">open_output_file</a></div><div class="ttdeci">static int open_output_file(const char *filename, AVCodecContext *input_codec_context, AVFormatContext **output_format_context, AVCodecContext **output_codec_context)</div><div class="ttdoc">Open an output file and the required encoder. </div><div class="ttdef"><b>Definition:</b> <a href="transcode__aac_8c_source.html#l00120">transcode_aac.c:120</a></div></div>
<div class="ttc" id="transcode__aac_8c_html_a5c320cc89448244f68daee53092da98c"><div class="ttname"><a href="transcode__aac_8c.html#a5c320cc89448244f68daee53092da98c">decode_audio_frame</a></div><div class="ttdeci">static int decode_audio_frame(AVFrame *frame, AVFormatContext *input_format_context, AVCodecContext *input_codec_context, int *data_present, int *finished)</div><div class="ttdoc">Decode one audio frame from the input file. </div><div class="ttdef"><b>Definition:</b> <a href="transcode__aac_8c_source.html#l00303">transcode_aac.c:303</a></div></div>
<div class="ttc" id="avformat_8h_html_ab203c7b734e9c31b7c37d34f6e2c6aef"><div class="ttname"><a href="avformat_8h.html#ab203c7b734e9c31b7c37d34f6e2c6aef">AVFMT_GLOBALHEADER</a></div><div class="ttdeci">#define AVFMT_GLOBALHEADER</div><div class="ttdoc">Format wants global header. </div><div class="ttdef"><b>Definition:</b> <a href="avformat_8h_source.html#l00484">avformat.h:484</a></div></div>
<div class="ttc" id="group__lswr_html_gad7f29022726c871aadf935281a9813bc"><div class="ttname"><a href="group__lswr.html#gad7f29022726c871aadf935281a9813bc">swr_alloc_set_opts</a></div><div class="ttdeci">struct SwrContext * swr_alloc_set_opts(struct SwrContext *s, int64_t out_ch_layout, enum AVSampleFormat out_sample_fmt, int out_sample_rate, int64_t in_ch_layout, enum AVSampleFormat in_sample_fmt, int in_sample_rate, int log_offset, void *log_ctx)</div><div class="ttdoc">Allocate SwrContext if needed and set/reset common parameters. </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="group__lavf__encoding_html_ga8795680bd7489e96eeb5aef5e615cacc"><div class="ttname"><a href="group__lavf__encoding.html#ga8795680bd7489e96eeb5aef5e615cacc">av_guess_format</a></div><div class="ttdeci">AVOutputFormat * av_guess_format(const char *short_name, const char *filename, const char *mime_type)</div><div class="ttdoc">Return the output format in the list of registered output formats which best matches the provided par...</div></div>
<div class="ttc" id="transcode__aac_8c_html_a1509aea4299c0261c6c3f2a7bc8971d2"><div class="ttname"><a href="transcode__aac_8c.html#a1509aea4299c0261c6c3f2a7bc8971d2">add_samples_to_fifo</a></div><div class="ttdeci">static int add_samples_to_fifo(AVAudioFifo *fifo, uint8_t **converted_input_samples, const int frame_size)</div><div class="ttdoc">Add converted input audio samples to the FIFO buffer for later processing. </div><div class="ttdef"><b>Definition:</b> <a href="transcode__aac_8c_source.html#l00413">transcode_aac.c:413</a></div></div>
<div class="ttc" id="group__lavu__error_html_ga334ea23fd9e492cd0e718330f2353b6b"><div class="ttname"><a href="group__lavu__error.html#ga334ea23fd9e492cd0e718330f2353b6b">AVERROR_EXIT</a></div><div class="ttdeci">#define AVERROR_EXIT</div><div class="ttdoc">Immediate exit was requested; the called function should not be restarted. </div><div class="ttdef"><b>Definition:</b> <a href="error_8h_source.html#l00056">error.h:56</a></div></div>
<div class="ttc" id="structAVStream_html"><div class="ttname"><a href="structAVStream.html">AVStream</a></div><div class="ttdoc">Stream structure. </div><div class="ttdef"><b>Definition:</b> <a href="avformat_8h_source.html#l00877">avformat.h:877</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="group__lavu__sampmanip_html_ga4db4c77f928d32c7d8854732f50b8c04"><div class="ttname"><a href="group__lavu__sampmanip.html#ga4db4c77f928d32c7d8854732f50b8c04">av_samples_alloc</a></div><div class="ttdeci">int av_samples_alloc(uint8_t **audio_data, int *linesize, int nb_channels, int nb_samples, enum AVSampleFormat sample_fmt, int align)</div><div class="ttdoc">Allocate a samples buffer for nb_samples samples, and fill data pointers and linesize accordingly...</div></div>
<div class="ttc" id="transcode__aac_8c_html_a96cd24fde0bde66e80f3141a1def94c6"><div class="ttname"><a href="transcode__aac_8c.html#a96cd24fde0bde66e80f3141a1def94c6">init_fifo</a></div><div class="ttdeci">static int init_fifo(AVAudioFifo **fifo, AVCodecContext *output_codec_context)</div><div class="ttdoc">Initialize a FIFO buffer for the audio samples to be encoded. </div><div class="ttdef"><b>Definition:</b> <a href="transcode__aac_8c_source.html#l00279">transcode_aac.c:279</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="transcode__aac_8c_html_a40d898a8dbfccabcbbff15a29924e97f"><div class="ttname"><a href="transcode__aac_8c.html#a40d898a8dbfccabcbbff15a29924e97f">OUTPUT_BIT_RATE</a></div><div class="ttdeci">#define OUTPUT_BIT_RATE</div><div class="ttdoc">The output bit rate in kbit/s. </div><div class="ttdef"><b>Definition:</b> <a href="transcode__aac_8c_source.html#l00044">transcode_aac.c:44</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="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__lswr_html_ga818f7d78b1ad7d8d5b70de374b668c34"><div class="ttname"><a href="group__lswr.html#ga818f7d78b1ad7d8d5b70de374b668c34">swr_free</a></div><div class="ttdeci">void swr_free(struct SwrContext **s)</div><div class="ttdoc">Free the given SwrContext and set the pointer to NULL. </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__lavf__core_html_gac2990b13b68e831a408fce8e1d0d6445"><div class="ttname"><a href="group__lavf__core.html#gac2990b13b68e831a408fce8e1d0d6445">avformat_free_context</a></div><div class="ttdeci">void avformat_free_context(AVFormatContext *s)</div><div class="ttdoc">Free an AVFormatContext and all its streams. </div></div>
<div class="ttc" id="transcode__aac_8c_html_adc7cf4c70d2850aecf8c9997a350147c"><div class="ttname"><a href="transcode__aac_8c.html#adc7cf4c70d2850aecf8c9997a350147c">get_error_text</a></div><div class="ttdeci">static const char * get_error_text(const int error)</div><div class="ttdoc">Convert an error code into a text message. </div><div class="ttdef"><b>Definition:</b> <a href="transcode__aac_8c_source.html#l00053">transcode_aac.c:53</a></div></div>
<div class="ttc" id="group__lavf__decoding_html_ga4fdb3084415a82e3810de6ee60e46a61"><div class="ttname"><a href="group__lavf__decoding.html#ga4fdb3084415a82e3810de6ee60e46a61">av_read_frame</a></div><div class="ttdeci">int av_read_frame(AVFormatContext *s, AVPacket *pkt)</div><div class="ttdoc">Return the next frame of a stream. </div></div>
<div class="ttc" id="group__lavu__frame_html_ga6b1acbfa82c79bf7fd78d868572f0ceb"><div class="ttname"><a href="group__lavu__frame.html#ga6b1acbfa82c79bf7fd78d868572f0ceb">av_frame_get_buffer</a></div><div class="ttdeci">int av_frame_get_buffer(AVFrame *frame, int align)</div><div class="ttdoc">Allocate new buffer(s) for audio or video data. </div></div>
<div class="ttc" id="transcode__aac_8c_html_a4fbb704fb96c36a78a36eee010306ce7"><div class="ttname"><a href="transcode__aac_8c.html#a4fbb704fb96c36a78a36eee010306ce7">pts</a></div><div class="ttdeci">static int64_t pts</div><div class="ttdoc">Global timestamp for the audio frames. </div><div class="ttdef"><b>Definition:</b> <a href="transcode__aac_8c_source.html#l00547">transcode_aac.c:547</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__audiofifo_html_ga0e7fadeea09c52a96eb4082a9e169bb4"><div class="ttname"><a href="group__lavu__audiofifo.html#ga0e7fadeea09c52a96eb4082a9e169bb4">av_audio_fifo_write</a></div><div class="ttdeci">int av_audio_fifo_write(AVAudioFifo *af, void **data, int nb_samples)</div><div class="ttdoc">Write data to an AVAudioFifo. </div></div>
<div class="ttc" id="transcode__aac_8c_html_a4d4855d9b709af9628540e41e5ebb925"><div class="ttname"><a href="transcode__aac_8c.html#a4d4855d9b709af9628540e41e5ebb925">OUTPUT_CHANNELS</a></div><div class="ttdeci">#define OUTPUT_CHANNELS</div><div class="ttdoc">The number of output channels. </div><div class="ttdef"><b>Definition:</b> <a href="transcode__aac_8c_source.html#l00046">transcode_aac.c:46</a></div></div>
<div class="ttc" id="group__lavc__core_html_ga9ed82634c59b339786575827c47a8f68"><div class="ttname"><a href="group__lavc__core.html#ga9ed82634c59b339786575827c47a8f68">AV_CODEC_FLAG_GLOBAL_HEADER</a></div><div class="ttdeci">#define AV_CODEC_FLAG_GLOBAL_HEADER</div><div class="ttdoc">Place global headers in extradata instead of every keyframe. </div><div class="ttdef"><b>Definition:</b> <a href="avcodec_8h_source.html#l00783">avcodec.h:783</a></div></div>
<div class="ttc" id="group__lavu__error_html_ga5792b4a2d18d7d9cb0efbcfc335dce24"><div class="ttname"><a href="group__lavu__error.html#ga5792b4a2d18d7d9cb0efbcfc335dce24">av_strerror</a></div><div class="ttdeci">int av_strerror(int errnum, char *errbuf, size_t errbuf_size)</div><div class="ttdoc">Put a description of the AVERROR code errnum in errbuf. </div></div>
<div class="ttc" id="avformat_8h_html"><div class="ttname"><a href="avformat_8h.html">avformat.h</a></div><div class="ttdoc">Main libavformat public API header. </div></div>
<div class="ttc" id="group__lavf__decoding_html_gad42172e27cddafb81096939783b157bb"><div class="ttname"><a href="group__lavf__decoding.html#gad42172e27cddafb81096939783b157bb">avformat_find_stream_info</a></div><div class="ttdeci">int avformat_find_stream_info(AVFormatContext *ic, AVDictionary **options)</div><div class="ttdoc">Read packets of a media file to get stream information. </div></div>
<div class="ttc" id="transcode__aac_8c_html_aea497107d8d2a7a1e5bf92422ccc6715"><div class="ttname"><a href="transcode__aac_8c.html#aea497107d8d2a7a1e5bf92422ccc6715">write_output_file_trailer</a></div><div class="ttdeci">static int write_output_file_trailer(AVFormatContext *output_format_context)</div><div class="ttdoc">Write the trailer of the output file container. </div><div class="ttdef"><b>Definition:</b> <a href="transcode__aac_8c_source.html#l00637">transcode_aac.c:637</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="structAVRational_html_aee46bdac67d965ac0a4204e753f910c3"><div class="ttname"><a href="structAVRational.html#aee46bdac67d965ac0a4204e753f910c3">AVRational::den</a></div><div class="ttdeci">int den</div><div class="ttdoc">denominator </div><div class="ttdef"><b>Definition:</b> <a href="rational_8h_source.html#l00045">rational.h:45</a></div></div>
<div class="ttc" id="group__lavf__decoding_html_gae804b99aec044690162b8b9b110236a4"><div class="ttname"><a href="group__lavf__decoding.html#gae804b99aec044690162b8b9b110236a4">avformat_close_input</a></div><div class="ttdeci">void avformat_close_input(AVFormatContext **s)</div><div class="ttdoc">Close an opened input AVFormatContext. </div></div>
<div class="ttc" id="audio__fifo_8h_html"><div class="ttname"><a href="audio__fifo_8h.html">audio_fifo.h</a></div><div class="ttdoc">Audio FIFO Buffer. </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="group__lavf__decoding_html_ga31d601155e9035d5b0e7efedc894ee49"><div class="ttname"><a href="group__lavf__decoding.html#ga31d601155e9035d5b0e7efedc894ee49">avformat_open_input</a></div><div class="ttdeci">int avformat_open_input(AVFormatContext **ps, const char *url, AVInputFormat *fmt, AVDictionary **options)</div><div class="ttdoc">Open an input stream and read the header. </div></div>
<div class="ttc" id="group__channel__mask__c_html_gacb84f3e93a583e1f84a5283162a606a2"><div class="ttname"><a href="group__channel__mask__c.html#gacb84f3e93a583e1f84a5283162a606a2">av_get_default_channel_layout</a></div><div class="ttdeci">int64_t av_get_default_channel_layout(int nb_channels)</div><div class="ttdoc">Return default channel layout for a given number of channels. </div></div>
<div class="ttc" id="group__lavf__encoding_html_ga7f14007e7dc8f481f054b21614dfec13"><div class="ttname"><a href="group__lavf__encoding.html#ga7f14007e7dc8f481f054b21614dfec13">av_write_trailer</a></div><div class="ttdeci">int av_write_trailer(AVFormatContext *s)</div><div class="ttdoc">Write the stream trailer to an output media file and free the file private data. </div></div>
<div class="ttc" id="transcode__aac_8c_html_af79f075aaf578455b0d2d435e395f1ff"><div class="ttname"><a href="transcode__aac_8c.html#af79f075aaf578455b0d2d435e395f1ff">init_converted_samples</a></div><div class="ttdeci">static int init_converted_samples(uint8_t ***converted_input_samples, AVCodecContext *output_codec_context, int frame_size)</div><div class="ttdoc">Initialize a temporary storage for the specified number of audio samples. </div><div class="ttdef"><b>Definition:</b> <a href="transcode__aac_8c_source.html#l00354">transcode_aac.c:354</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="transcode__aac_8c_html_a72741423006b4ab38bf924fa567e7081"><div class="ttname"><a href="transcode__aac_8c.html#a72741423006b4ab38bf924fa567e7081">init_output_frame</a></div><div class="ttdeci">static int init_output_frame(AVFrame **frame, AVCodecContext *output_codec_context, int frame_size)</div><div class="ttdoc">Initialize one input frame for writing to the output file. </div><div class="ttdef"><b>Definition:</b> <a href="transcode__aac_8c_source.html#l00508">transcode_aac.c:508</a></div></div>
<div class="ttc" id="structAVStream_html_a9db755451f14e2bf590d4b85d82b32e6"><div class="ttname"><a href="structAVStream.html#a9db755451f14e2bf590d4b85d82b32e6">AVStream::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="avformat_8h_source.html#l00919">avformat.h:919</a></div></div>
<div class="ttc" id="structAVFrame_html_afca04d808393822625e09b5ba91c6756"><div class="ttname"><a href="structAVFrame.html#afca04d808393822625e09b5ba91c6756">AVFrame::extended_data</a></div><div class="ttdeci">uint8_t ** extended_data</div><div class="ttdoc">pointers to the data planes/channels. </div><div class="ttdef"><b>Definition:</b> <a href="frame_8h_source.html#l00225">frame.h:225</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__lavf__core_html_ga917265caec45ef5a0646356ed1a507e3"><div class="ttname"><a href="group__lavf__core.html#ga917265caec45ef5a0646356ed1a507e3">av_register_all</a></div><div class="ttdeci">void av_register_all(void)</div><div class="ttdoc">Initialize libavformat and register all the muxers, demuxers and protocols. </div></div>
<div class="ttc" id="avio_8h_html_ae118a1f37f1e48617609ead9910aac15"><div class="ttname"><a href="avio_8h.html#ae118a1f37f1e48617609ead9910aac15">avio_closep</a></div><div class="ttdeci">int avio_closep(AVIOContext **s)</div><div class="ttdoc">Close the resource accessed by the AVIOContext *s, free it and set the pointer pointing to it to NULL...</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="group__lswr_html_gae173e8ed91717700471a1dcd06f00f67"><div class="ttname"><a href="group__lswr.html#gae173e8ed91717700471a1dcd06f00f67">swr_init</a></div><div class="ttdeci">int swr_init(struct SwrContext *s)</div><div class="ttdoc">Initialize context after user parameters have been set. </div></div>
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