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<li class="navelem"><a class="el" href="dir_66603ba727127b2819ef9a618b456334.html">libavresample</a></li> </ul>
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<a href="avresample_8h.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a name="l00001"></a><span class="lineno"> 1</span> <span class="comment">/*</span></div>
<div class="line"><a name="l00002"></a><span class="lineno"> 2</span> <span class="comment"> * Copyright (c) 2012 Justin Ruggles <justin.ruggles@gmail.com></span></div>
<div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment"> * This file is part of FFmpeg.</span></div>
<div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment"> * FFmpeg is free software; you can redistribute it and/or</span></div>
<div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment"> * modify it under the terms of the GNU Lesser General Public</span></div>
<div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment"> * License as published by the Free Software Foundation; either</span></div>
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment"> * version 2.1 of the License, or (at your option) any later version.</span></div>
<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment"> * FFmpeg is distributed in the hope that it will be useful,</span></div>
<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment"> * but WITHOUT ANY WARRANTY; without even the implied warranty of</span></div>
<div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="comment"> * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU</span></div>
<div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="comment"> * Lesser General Public License for more details.</span></div>
<div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="comment"> * You should have received a copy of the GNU Lesser General Public</span></div>
<div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="comment"> * License along with FFmpeg; if not, write to the Free Software</span></div>
<div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="comment"> * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA</span></div>
<div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00020"></a><span class="lineno"> 20</span> </div>
<div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="preprocessor">#ifndef AVRESAMPLE_AVRESAMPLE_H</span></div>
<div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="preprocessor"></span><span class="preprocessor">#define AVRESAMPLE_AVRESAMPLE_H</span></div>
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="preprocessor"></span><span class="comment"></span></div>
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="comment"> * @file</span></div>
<div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="comment"> * @ingroup lavr</span></div>
<div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="comment"> * external API header</span></div>
<div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="comment"></span></div>
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="comment"> * @defgroup lavr Libavresample</span></div>
<div class="line"><a name="l00032"></a><span class="lineno"> 32</span> <span class="comment"> * @{</span></div>
<div class="line"><a name="l00033"></a><span class="lineno"> 33</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00034"></a><span class="lineno"> 34</span> <span class="comment"> * Libavresample (lavr) is a library that handles audio resampling, sample</span></div>
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span> <span class="comment"> * format conversion and mixing.</span></div>
<div class="line"><a name="l00036"></a><span class="lineno"> 36</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00037"></a><span class="lineno"> 37</span> <span class="comment"> * Interaction with lavr is done through AVAudioResampleContext, which is</span></div>
<div class="line"><a name="l00038"></a><span class="lineno"> 38</span> <span class="comment"> * allocated with avresample_alloc_context(). It is opaque, so all parameters</span></div>
<div class="line"><a name="l00039"></a><span class="lineno"> 39</span> <span class="comment"> * must be set with the @ref avoptions API.</span></div>
<div class="line"><a name="l00040"></a><span class="lineno"> 40</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00041"></a><span class="lineno"> 41</span> <span class="comment"> * For example the following code will setup conversion from planar float sample</span></div>
<div class="line"><a name="l00042"></a><span class="lineno"> 42</span> <span class="comment"> * format to interleaved signed 16-bit integer, downsampling from 48kHz to</span></div>
<div class="line"><a name="l00043"></a><span class="lineno"> 43</span> <span class="comment"> * 44.1kHz and downmixing from 5.1 channels to stereo (using the default mixing</span></div>
<div class="line"><a name="l00044"></a><span class="lineno"> 44</span> <span class="comment"> * matrix):</span></div>
<div class="line"><a name="l00045"></a><span class="lineno"> 45</span> <span class="comment"> * @code</span></div>
<div class="line"><a name="l00046"></a><span class="lineno"> 46</span> <span class="comment"> * AVAudioResampleContext *avr = avresample_alloc_context();</span></div>
<div class="line"><a name="l00047"></a><span class="lineno"> 47</span> <span class="comment"> * av_opt_set_int(avr, "in_channel_layout", AV_CH_LAYOUT_5POINT1, 0);</span></div>
<div class="line"><a name="l00048"></a><span class="lineno"> 48</span> <span class="comment"> * av_opt_set_int(avr, "out_channel_layout", AV_CH_LAYOUT_STEREO, 0);</span></div>
<div class="line"><a name="l00049"></a><span class="lineno"> 49</span> <span class="comment"> * av_opt_set_int(avr, "in_sample_rate", 48000, 0);</span></div>
<div class="line"><a name="l00050"></a><span class="lineno"> 50</span> <span class="comment"> * av_opt_set_int(avr, "out_sample_rate", 44100, 0);</span></div>
<div class="line"><a name="l00051"></a><span class="lineno"> 51</span> <span class="comment"> * av_opt_set_int(avr, "in_sample_fmt", AV_SAMPLE_FMT_FLTP, 0);</span></div>
<div class="line"><a name="l00052"></a><span class="lineno"> 52</span> <span class="comment"> * av_opt_set_int(avr, "out_sample_fmt", AV_SAMPLE_FMT_S16, 0);</span></div>
<div class="line"><a name="l00053"></a><span class="lineno"> 53</span> <span class="comment"> * @endcode</span></div>
<div class="line"><a name="l00054"></a><span class="lineno"> 54</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00055"></a><span class="lineno"> 55</span> <span class="comment"> * Once the context is initialized, it must be opened with avresample_open(). If</span></div>
<div class="line"><a name="l00056"></a><span class="lineno"> 56</span> <span class="comment"> * you need to change the conversion parameters, you must close the context with</span></div>
<div class="line"><a name="l00057"></a><span class="lineno"> 57</span> <span class="comment"> * avresample_close(), change the parameters as described above, then reopen it</span></div>
<div class="line"><a name="l00058"></a><span class="lineno"> 58</span> <span class="comment"> * again.</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"> * The conversion itself is done by repeatedly calling avresample_convert().</span></div>
<div class="line"><a name="l00061"></a><span class="lineno"> 61</span> <span class="comment"> * Note that the samples may get buffered in two places in lavr. The first one</span></div>
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span> <span class="comment"> * is the output FIFO, where the samples end up if the output buffer is not</span></div>
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span> <span class="comment"> * large enough. The data stored in there may be retrieved at any time with</span></div>
<div class="line"><a name="l00064"></a><span class="lineno"> 64</span> <span class="comment"> * avresample_read(). The second place is the resampling delay buffer,</span></div>
<div class="line"><a name="l00065"></a><span class="lineno"> 65</span> <span class="comment"> * applicable only when resampling is done. The samples in it require more input</span></div>
<div class="line"><a name="l00066"></a><span class="lineno"> 66</span> <span class="comment"> * before they can be processed. Their current amount is returned by</span></div>
<div class="line"><a name="l00067"></a><span class="lineno"> 67</span> <span class="comment"> * avresample_get_delay(). At the end of conversion the resampling buffer can be</span></div>
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span> <span class="comment"> * flushed by calling avresample_convert() with NULL input.</span></div>
<div class="line"><a name="l00069"></a><span class="lineno"> 69</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00070"></a><span class="lineno"> 70</span> <span class="comment"> * The following code demonstrates the conversion loop assuming the parameters</span></div>
<div class="line"><a name="l00071"></a><span class="lineno"> 71</span> <span class="comment"> * from above and caller-defined functions get_input() and handle_output():</span></div>
<div class="line"><a name="l00072"></a><span class="lineno"> 72</span> <span class="comment"> * @code</span></div>
<div class="line"><a name="l00073"></a><span class="lineno"> 73</span> <span class="comment"> * uint8_t **input;</span></div>
<div class="line"><a name="l00074"></a><span class="lineno"> 74</span> <span class="comment"> * int in_linesize, in_samples;</span></div>
<div class="line"><a name="l00075"></a><span class="lineno"> 75</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00076"></a><span class="lineno"> 76</span> <span class="comment"> * while (get_input(&input, &in_linesize, &in_samples)) {</span></div>
<div class="line"><a name="l00077"></a><span class="lineno"> 77</span> <span class="comment"> * uint8_t *output</span></div>
<div class="line"><a name="l00078"></a><span class="lineno"> 78</span> <span class="comment"> * int out_linesize;</span></div>
<div class="line"><a name="l00079"></a><span class="lineno"> 79</span> <span class="comment"> * int out_samples = avresample_get_out_samples(avr, in_samples);</span></div>
<div class="line"><a name="l00080"></a><span class="lineno"> 80</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00081"></a><span class="lineno"> 81</span> <span class="comment"> * av_samples_alloc(&output, &out_linesize, 2, out_samples,</span></div>
<div class="line"><a name="l00082"></a><span class="lineno"> 82</span> <span class="comment"> * AV_SAMPLE_FMT_S16, 0);</span></div>
<div class="line"><a name="l00083"></a><span class="lineno"> 83</span> <span class="comment"> * out_samples = avresample_convert(avr, &output, out_linesize, out_samples,</span></div>
<div class="line"><a name="l00084"></a><span class="lineno"> 84</span> <span class="comment"> * input, in_linesize, in_samples);</span></div>
<div class="line"><a name="l00085"></a><span class="lineno"> 85</span> <span class="comment"> * handle_output(output, out_linesize, out_samples);</span></div>
<div class="line"><a name="l00086"></a><span class="lineno"> 86</span> <span class="comment"> * av_freep(&output);</span></div>
<div class="line"><a name="l00087"></a><span class="lineno"> 87</span> <span class="comment"> * }</span></div>
<div class="line"><a name="l00088"></a><span class="lineno"> 88</span> <span class="comment"> * @endcode</span></div>
<div class="line"><a name="l00089"></a><span class="lineno"> 89</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00090"></a><span class="lineno"> 90</span> <span class="comment"> * When the conversion is finished and the FIFOs are flushed if required, the</span></div>
<div class="line"><a name="l00091"></a><span class="lineno"> 91</span> <span class="comment"> * conversion context and everything associated with it must be freed with</span></div>
<div class="line"><a name="l00092"></a><span class="lineno"> 92</span> <span class="comment"> * avresample_free().</span></div>
<div class="line"><a name="l00093"></a><span class="lineno"> 93</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00094"></a><span class="lineno"> 94</span> </div>
<div class="line"><a name="l00095"></a><span class="lineno"> 95</span> <span class="preprocessor">#include "<a class="code" href="avutil_8h.html">libavutil/avutil.h</a>"</span></div>
<div class="line"><a name="l00096"></a><span class="lineno"> 96</span> <span class="preprocessor">#include "<a class="code" href="channel__layout_8h.html">libavutil/channel_layout.h</a>"</span></div>
<div class="line"><a name="l00097"></a><span class="lineno"> 97</span> <span class="preprocessor">#include "<a class="code" href="dict_8h.html">libavutil/dict.h</a>"</span></div>
<div class="line"><a name="l00098"></a><span class="lineno"> 98</span> <span class="preprocessor">#include "<a class="code" href="frame_8h.html">libavutil/frame.h</a>"</span></div>
<div class="line"><a name="l00099"></a><span class="lineno"> 99</span> <span class="preprocessor">#include "<a class="code" href="log_8h.html">libavutil/log.h</a>"</span></div>
<div class="line"><a name="l00100"></a><span class="lineno"> 100</span> <span class="preprocessor">#include "<a class="code" href="mathematics_8h.html">libavutil/mathematics.h</a>"</span></div>
<div class="line"><a name="l00101"></a><span class="lineno"> 101</span> </div>
<div class="line"><a name="l00102"></a><span class="lineno"> 102</span> <span class="preprocessor">#include "<a class="code" href="libavresample_2version_8h.html">libavresample/version.h</a>"</span></div>
<div class="line"><a name="l00103"></a><span class="lineno"> 103</span> </div>
<div class="line"><a name="l00104"></a><span class="lineno"><a class="line" href="group__lavr.html#gaee1afc173c8d1eefe0e1d8a881b7df26"> 104</a></span> <span class="preprocessor">#define AVRESAMPLE_MAX_CHANNELS 32</span></div>
<div class="line"><a name="l00105"></a><span class="lineno"> 105</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00106"></a><span class="lineno"><a class="line" href="group__lavr.html#gabe4ee61779da95d51dff716ef5b275a3"> 106</a></span> <span class="keyword">typedef</span> <span class="keyword">struct </span><a class="code" href="group__lavr.html#gabe4ee61779da95d51dff716ef5b275a3">AVAudioResampleContext</a> <a class="code" href="group__lavr.html#gabe4ee61779da95d51dff716ef5b275a3">AVAudioResampleContext</a>;</div>
<div class="line"><a name="l00107"></a><span class="lineno"> 107</span> <span class="comment"></span></div>
<div class="line"><a name="l00108"></a><span class="lineno"> 108</span> <span class="comment">/** Mixing Coefficient Types */</span></div>
<div class="line"><a name="l00109"></a><span class="lineno"><a class="line" href="group__lavr.html#gaaaa652e3ad8554a0dca126e8571735dd"> 109</a></span> <span class="keyword">enum</span> <a class="code" href="group__lavr.html#gaaaa652e3ad8554a0dca126e8571735dd">AVMixCoeffType</a> {</div>
<div class="line"><a name="l00110"></a><span class="lineno"><a class="line" href="group__lavr.html#ggaaaa652e3ad8554a0dca126e8571735ddab01d45f335057a1f930b0b677adb3a60"> 110</a></span>  <a class="code" href="group__lavr.html#ggaaaa652e3ad8554a0dca126e8571735ddab01d45f335057a1f930b0b677adb3a60">AV_MIX_COEFF_TYPE_Q8</a>, <span class="comment">/** 16-bit 8.8 fixed-point */</span></div>
<div class="line"><a name="l00111"></a><span class="lineno"><a class="line" href="group__lavr.html#ggaaaa652e3ad8554a0dca126e8571735ddaf459c8599c850abd5d0308cd8609af68"> 111</a></span>  <a class="code" href="group__lavr.html#ggaaaa652e3ad8554a0dca126e8571735ddaf459c8599c850abd5d0308cd8609af68">AV_MIX_COEFF_TYPE_Q15</a>, <span class="comment">/** 32-bit 17.15 fixed-point */</span></div>
<div class="line"><a name="l00112"></a><span class="lineno"><a class="line" href="group__lavr.html#ggaaaa652e3ad8554a0dca126e8571735dda5d6c3ee92cc045714ac2ec4c83588841"> 112</a></span>  <a class="code" href="group__lavr.html#ggaaaa652e3ad8554a0dca126e8571735dda5d6c3ee92cc045714ac2ec4c83588841">AV_MIX_COEFF_TYPE_FLT</a>, <span class="comment">/** floating-point */</span></div>
<div class="line"><a name="l00113"></a><span class="lineno"><a class="line" href="group__lavr.html#ggaaaa652e3ad8554a0dca126e8571735dda2672ba31292b1fb0a861b035466964a9"> 113</a></span>  <a class="code" href="group__lavr.html#ggaaaa652e3ad8554a0dca126e8571735dda2672ba31292b1fb0a861b035466964a9">AV_MIX_COEFF_TYPE_NB</a>, <span class="comment">/** Number of coeff types. Not part of ABI */</span></div>
<div class="line"><a name="l00114"></a><span class="lineno"> 114</span> };</div>
<div class="line"><a name="l00115"></a><span class="lineno"> 115</span> <span class="comment"></span></div>
<div class="line"><a name="l00116"></a><span class="lineno"> 116</span> <span class="comment">/** Resampling Filter Types */</span></div>
<div class="line"><a name="l00117"></a><span class="lineno"><a class="line" href="group__lavr.html#ga3813087032c02f1e84f0ca2962b09400"> 117</a></span> <span class="keyword">enum</span> <a class="code" href="group__lavr.html#ga3813087032c02f1e84f0ca2962b09400">AVResampleFilterType</a> {</div>
<div class="line"><a name="l00118"></a><span class="lineno"><a class="line" href="group__lavr.html#gga3813087032c02f1e84f0ca2962b09400ac8d3b66c4c4bd02418ce0b882fb7d4fa"> 118</a></span>  <a class="code" href="group__lavr.html#gga3813087032c02f1e84f0ca2962b09400ac8d3b66c4c4bd02418ce0b882fb7d4fa">AV_RESAMPLE_FILTER_TYPE_CUBIC</a>, <span class="comment">/**< Cubic */</span></div>
<div class="line"><a name="l00119"></a><span class="lineno"><a class="line" href="group__lavr.html#gga3813087032c02f1e84f0ca2962b09400ace0cbc5bda3d6fa26b054b2fa7702886"> 119</a></span>  <a class="code" href="group__lavr.html#gga3813087032c02f1e84f0ca2962b09400ace0cbc5bda3d6fa26b054b2fa7702886">AV_RESAMPLE_FILTER_TYPE_BLACKMAN_NUTTALL</a>, <span class="comment">/**< Blackman Nuttall Windowed Sinc */</span></div>
<div class="line"><a name="l00120"></a><span class="lineno"><a class="line" href="group__lavr.html#gga3813087032c02f1e84f0ca2962b09400af552d08855b8a5f4b46f6328633c8f1f"> 120</a></span>  <a class="code" href="group__lavr.html#gga3813087032c02f1e84f0ca2962b09400af552d08855b8a5f4b46f6328633c8f1f">AV_RESAMPLE_FILTER_TYPE_KAISER</a>, <span class="comment">/**< Kaiser Windowed Sinc */</span></div>
<div class="line"><a name="l00121"></a><span class="lineno"> 121</span> };</div>
<div class="line"><a name="l00122"></a><span class="lineno"> 122</span> </div>
<div class="line"><a name="l00123"></a><span class="lineno"><a class="line" href="group__lavr.html#ga302491313b02acca1a822249caa8cb10"> 123</a></span> <span class="keyword">enum</span> <a class="code" href="group__lavr.html#ga302491313b02acca1a822249caa8cb10">AVResampleDitherMethod</a> {</div>
<div class="line"><a name="l00124"></a><span class="lineno"><a class="line" href="group__lavr.html#gga302491313b02acca1a822249caa8cb10a4f892b254f02b3ebf775169f786e966b"> 124</a></span>  <a class="code" href="group__lavr.html#gga302491313b02acca1a822249caa8cb10a4f892b254f02b3ebf775169f786e966b">AV_RESAMPLE_DITHER_NONE</a>, <span class="comment">/**< Do not use dithering */</span></div>
<div class="line"><a name="l00125"></a><span class="lineno"><a class="line" href="group__lavr.html#gga302491313b02acca1a822249caa8cb10a6e6841e6042d8059db5fdebe67d783ad"> 125</a></span>  <a class="code" href="group__lavr.html#gga302491313b02acca1a822249caa8cb10a6e6841e6042d8059db5fdebe67d783ad">AV_RESAMPLE_DITHER_RECTANGULAR</a>, <span class="comment">/**< Rectangular Dither */</span></div>
<div class="line"><a name="l00126"></a><span class="lineno"><a class="line" href="group__lavr.html#gga302491313b02acca1a822249caa8cb10a4d9b50692d2a3cdf6c3cfeb7f14ccfc6"> 126</a></span>  <a class="code" href="group__lavr.html#gga302491313b02acca1a822249caa8cb10a4d9b50692d2a3cdf6c3cfeb7f14ccfc6">AV_RESAMPLE_DITHER_TRIANGULAR</a>, <span class="comment">/**< Triangular Dither*/</span></div>
<div class="line"><a name="l00127"></a><span class="lineno"><a class="line" href="group__lavr.html#gga302491313b02acca1a822249caa8cb10a261d5a5101aeff5e7ff5813787481bd6"> 127</a></span>  <a class="code" href="group__lavr.html#gga302491313b02acca1a822249caa8cb10a261d5a5101aeff5e7ff5813787481bd6">AV_RESAMPLE_DITHER_TRIANGULAR_HP</a>, <span class="comment">/**< Triangular Dither with High Pass */</span></div>
<div class="line"><a name="l00128"></a><span class="lineno"><a class="line" href="group__lavr.html#gga302491313b02acca1a822249caa8cb10aa1abacc1c6e8c448959bc49316b8f566"> 128</a></span>  <a class="code" href="group__lavr.html#gga302491313b02acca1a822249caa8cb10aa1abacc1c6e8c448959bc49316b8f566">AV_RESAMPLE_DITHER_TRIANGULAR_NS</a>, <span class="comment">/**< Triangular Dither with Noise Shaping */</span></div>
<div class="line"><a name="l00129"></a><span class="lineno"><a class="line" href="group__lavr.html#gga302491313b02acca1a822249caa8cb10ac9e29d7f4af2590ba9a59429d88d57c0"> 129</a></span>  <a class="code" href="group__lavr.html#gga302491313b02acca1a822249caa8cb10ac9e29d7f4af2590ba9a59429d88d57c0">AV_RESAMPLE_DITHER_NB</a>, <span class="comment">/**< Number of dither types. Not part of ABI. */</span></div>
<div class="line"><a name="l00130"></a><span class="lineno"> 130</span> };</div>
<div class="line"><a name="l00131"></a><span class="lineno"> 131</span> <span class="comment"></span></div>
<div class="line"><a name="l00132"></a><span class="lineno"> 132</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00133"></a><span class="lineno"> 133</span> <span class="comment"> * Return the LIBAVRESAMPLE_VERSION_INT constant.</span></div>
<div class="line"><a name="l00134"></a><span class="lineno"> 134</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00135"></a><span class="lineno"> 135</span> <span class="keywordtype">unsigned</span> <a class="code" href="group__lavr.html#gaedabbb0590c33b7b9ce1ce213629dd3e">avresample_version</a>(<span class="keywordtype">void</span>);</div>
<div class="line"><a name="l00136"></a><span class="lineno"> 136</span> <span class="comment"></span></div>
<div class="line"><a name="l00137"></a><span class="lineno"> 137</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00138"></a><span class="lineno"> 138</span> <span class="comment"> * Return the libavresample build-time configuration.</span></div>
<div class="line"><a name="l00139"></a><span class="lineno"> 139</span> <span class="comment"> * @return configure string</span></div>
<div class="line"><a name="l00140"></a><span class="lineno"> 140</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00141"></a><span class="lineno"> 141</span> <span class="keyword">const</span> <span class="keywordtype">char</span> *<a class="code" href="group__lavr.html#ga59d94ba578f9d7a90fd5d82ee6f361b4">avresample_configuration</a>(<span class="keywordtype">void</span>);</div>
<div class="line"><a name="l00142"></a><span class="lineno"> 142</span> <span class="comment"></span></div>
<div class="line"><a name="l00143"></a><span class="lineno"> 143</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00144"></a><span class="lineno"> 144</span> <span class="comment"> * Return the libavresample license.</span></div>
<div class="line"><a name="l00145"></a><span class="lineno"> 145</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00146"></a><span class="lineno"> 146</span> <span class="keyword">const</span> <span class="keywordtype">char</span> *<a class="code" href="group__lavr.html#ga7e3794756514c6ccf42580c2a840d16c">avresample_license</a>(<span class="keywordtype">void</span>);</div>
<div class="line"><a name="l00147"></a><span class="lineno"> 147</span> <span class="comment"></span></div>
<div class="line"><a name="l00148"></a><span class="lineno"> 148</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00149"></a><span class="lineno"> 149</span> <span class="comment"> * Get the AVClass for AVAudioResampleContext.</span></div>
<div class="line"><a name="l00150"></a><span class="lineno"> 150</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00151"></a><span class="lineno"> 151</span> <span class="comment"> * Can be used in combination with AV_OPT_SEARCH_FAKE_OBJ for examining options</span></div>
<div class="line"><a name="l00152"></a><span class="lineno"> 152</span> <span class="comment"> * without allocating a context.</span></div>
<div class="line"><a name="l00153"></a><span class="lineno"> 153</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00154"></a><span class="lineno"> 154</span> <span class="comment"> * @see av_opt_find().</span></div>
<div class="line"><a name="l00155"></a><span class="lineno"> 155</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00156"></a><span class="lineno"> 156</span> <span class="comment"> * @return AVClass for AVAudioResampleContext</span></div>
<div class="line"><a name="l00157"></a><span class="lineno"> 157</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00158"></a><span class="lineno"> 158</span> <span class="keyword">const</span> <a class="code" href="structAVClass.html">AVClass</a> *<a class="code" href="group__lavr.html#ga40d8eeb3181386e30e5b02289e469a73">avresample_get_class</a>(<span class="keywordtype">void</span>);</div>
<div class="line"><a name="l00159"></a><span class="lineno"> 159</span> <span class="comment"></span></div>
<div class="line"><a name="l00160"></a><span class="lineno"> 160</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00161"></a><span class="lineno"> 161</span> <span class="comment"> * Allocate AVAudioResampleContext and set options.</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"> * @return allocated audio resample context, or NULL on failure</span></div>
<div class="line"><a name="l00164"></a><span class="lineno"> 164</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00165"></a><span class="lineno"> 165</span> <a class="code" href="group__lavr.html#gabe4ee61779da95d51dff716ef5b275a3">AVAudioResampleContext</a> *<a class="code" href="group__lavr.html#ga5b1bcb7a35446a07ce330a0ca2b38b72">avresample_alloc_context</a>(<span class="keywordtype">void</span>);</div>
<div class="line"><a name="l00166"></a><span class="lineno"> 166</span> <span class="comment"></span></div>
<div class="line"><a name="l00167"></a><span class="lineno"> 167</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00168"></a><span class="lineno"> 168</span> <span class="comment"> * Initialize AVAudioResampleContext.</span></div>
<div class="line"><a name="l00169"></a><span class="lineno"> 169</span> <span class="comment"> * @note The context must be configured using the AVOption API.</span></div>
<div class="line"><a name="l00170"></a><span class="lineno"> 170</span> <span class="comment"> * @note The fields "in_channel_layout", "out_channel_layout",</span></div>
<div class="line"><a name="l00171"></a><span class="lineno"> 171</span> <span class="comment"> * "in_sample_rate", "out_sample_rate", "in_sample_fmt",</span></div>
<div class="line"><a name="l00172"></a><span class="lineno"> 172</span> <span class="comment"> * "out_sample_fmt" must be set.</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"> * @see av_opt_set_int()</span></div>
<div class="line"><a name="l00175"></a><span class="lineno"> 175</span> <span class="comment"> * @see av_opt_set_dict()</span></div>
<div class="line"><a name="l00176"></a><span class="lineno"> 176</span> <span class="comment"> * @see av_get_default_channel_layout()</span></div>
<div class="line"><a name="l00177"></a><span class="lineno"> 177</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00178"></a><span class="lineno"> 178</span> <span class="comment"> * @param avr audio resample context</span></div>
<div class="line"><a name="l00179"></a><span class="lineno"> 179</span> <span class="comment"> * @return 0 on success, negative AVERROR code on failure</span></div>
<div class="line"><a name="l00180"></a><span class="lineno"> 180</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00181"></a><span class="lineno"> 181</span> <span class="keywordtype">int</span> <a class="code" href="group__lavr.html#gafc59c68689be880494ff24d10fd85143">avresample_open</a>(<a class="code" href="group__lavr.html#gabe4ee61779da95d51dff716ef5b275a3">AVAudioResampleContext</a> *avr);</div>
<div class="line"><a name="l00182"></a><span class="lineno"> 182</span> <span class="comment"></span></div>
<div class="line"><a name="l00183"></a><span class="lineno"> 183</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00184"></a><span class="lineno"> 184</span> <span class="comment"> * Check whether an AVAudioResampleContext is open or closed.</span></div>
<div class="line"><a name="l00185"></a><span class="lineno"> 185</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00186"></a><span class="lineno"> 186</span> <span class="comment"> * @param avr AVAudioResampleContext to check</span></div>
<div class="line"><a name="l00187"></a><span class="lineno"> 187</span> <span class="comment"> * @return 1 if avr is open, 0 if avr is closed.</span></div>
<div class="line"><a name="l00188"></a><span class="lineno"> 188</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00189"></a><span class="lineno"> 189</span> <span class="keywordtype">int</span> <a class="code" href="group__lavr.html#ga56519a7b3646ca435e64cb247c173c60">avresample_is_open</a>(<a class="code" href="group__lavr.html#gabe4ee61779da95d51dff716ef5b275a3">AVAudioResampleContext</a> *avr);</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">/**</span></div>
<div class="line"><a name="l00192"></a><span class="lineno"> 192</span> <span class="comment"> * Close AVAudioResampleContext.</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="comment"> * This closes the context, but it does not change the parameters. The context</span></div>
<div class="line"><a name="l00195"></a><span class="lineno"> 195</span> <span class="comment"> * can be reopened with avresample_open(). It does, however, clear the output</span></div>
<div class="line"><a name="l00196"></a><span class="lineno"> 196</span> <span class="comment"> * FIFO and any remaining leftover samples in the resampling delay buffer. If</span></div>
<div class="line"><a name="l00197"></a><span class="lineno"> 197</span> <span class="comment"> * there was a custom matrix being used, that is also cleared.</span></div>
<div class="line"><a name="l00198"></a><span class="lineno"> 198</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00199"></a><span class="lineno"> 199</span> <span class="comment"> * @see avresample_convert()</span></div>
<div class="line"><a name="l00200"></a><span class="lineno"> 200</span> <span class="comment"> * @see avresample_set_matrix()</span></div>
<div class="line"><a name="l00201"></a><span class="lineno"> 201</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00202"></a><span class="lineno"> 202</span> <span class="comment"> * @param avr audio resample context</span></div>
<div class="line"><a name="l00203"></a><span class="lineno"> 203</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00204"></a><span class="lineno"> 204</span> <span class="keywordtype">void</span> <a class="code" href="group__lavr.html#ga30751a8c6923418a090281669362bf79">avresample_close</a>(<a class="code" href="group__lavr.html#gabe4ee61779da95d51dff716ef5b275a3">AVAudioResampleContext</a> *avr);</div>
<div class="line"><a name="l00205"></a><span class="lineno"> 205</span> <span class="comment"></span></div>
<div class="line"><a name="l00206"></a><span class="lineno"> 206</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00207"></a><span class="lineno"> 207</span> <span class="comment"> * Free AVAudioResampleContext and associated AVOption values.</span></div>
<div class="line"><a name="l00208"></a><span class="lineno"> 208</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00209"></a><span class="lineno"> 209</span> <span class="comment"> * This also calls avresample_close() before freeing.</span></div>
<div class="line"><a name="l00210"></a><span class="lineno"> 210</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00211"></a><span class="lineno"> 211</span> <span class="comment"> * @param avr audio resample context</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="keywordtype">void</span> <a class="code" href="group__lavr.html#ga1d0782fe9a331b823c6d0dda5dbc63a5">avresample_free</a>(<a class="code" href="group__lavr.html#gabe4ee61779da95d51dff716ef5b275a3">AVAudioResampleContext</a> **avr);</div>
<div class="line"><a name="l00214"></a><span class="lineno"> 214</span> <span class="comment"></span></div>
<div class="line"><a name="l00215"></a><span class="lineno"> 215</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00216"></a><span class="lineno"> 216</span> <span class="comment"> * Generate a channel mixing matrix.</span></div>
<div class="line"><a name="l00217"></a><span class="lineno"> 217</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00218"></a><span class="lineno"> 218</span> <span class="comment"> * This function is the one used internally by libavresample for building the</span></div>
<div class="line"><a name="l00219"></a><span class="lineno"> 219</span> <span class="comment"> * default mixing matrix. It is made public just as a utility function for</span></div>
<div class="line"><a name="l00220"></a><span class="lineno"> 220</span> <span class="comment"> * building custom matrices.</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"> * @param in_layout input channel layout</span></div>
<div class="line"><a name="l00223"></a><span class="lineno"> 223</span> <span class="comment"> * @param out_layout output channel layout</span></div>
<div class="line"><a name="l00224"></a><span class="lineno"> 224</span> <span class="comment"> * @param center_mix_level mix level for the center channel</span></div>
<div class="line"><a name="l00225"></a><span class="lineno"> 225</span> <span class="comment"> * @param surround_mix_level mix level for the surround channel(s)</span></div>
<div class="line"><a name="l00226"></a><span class="lineno"> 226</span> <span class="comment"> * @param lfe_mix_level mix level for the low-frequency effects channel</span></div>
<div class="line"><a name="l00227"></a><span class="lineno"> 227</span> <span class="comment"> * @param normalize if 1, coefficients will be normalized to prevent</span></div>
<div class="line"><a name="l00228"></a><span class="lineno"> 228</span> <span class="comment"> * overflow. if 0, coefficients will not be</span></div>
<div class="line"><a name="l00229"></a><span class="lineno"> 229</span> <span class="comment"> * normalized.</span></div>
<div class="line"><a name="l00230"></a><span class="lineno"> 230</span> <span class="comment"> * @param[out] matrix mixing coefficients; matrix[i + stride * o] is</span></div>
<div class="line"><a name="l00231"></a><span class="lineno"> 231</span> <span class="comment"> * the weight of input channel i in output channel o.</span></div>
<div class="line"><a name="l00232"></a><span class="lineno"> 232</span> <span class="comment"> * @param stride distance between adjacent input channels in the</span></div>
<div class="line"><a name="l00233"></a><span class="lineno"> 233</span> <span class="comment"> * matrix array</span></div>
<div class="line"><a name="l00234"></a><span class="lineno"> 234</span> <span class="comment"> * @param matrix_encoding matrixed stereo downmix mode (e.g. dplii)</span></div>
<div class="line"><a name="l00235"></a><span class="lineno"> 235</span> <span class="comment"> * @return 0 on success, negative AVERROR code on failure</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"> 237</span> <span class="keywordtype">int</span> <a class="code" href="group__lavr.html#ga496a46260f4a5f5854ecc21f0f0011c8">avresample_build_matrix</a>(uint64_t in_layout, uint64_t out_layout,</div>
<div class="line"><a name="l00238"></a><span class="lineno"> 238</span>  <span class="keywordtype">double</span> center_mix_level, <span class="keywordtype">double</span> surround_mix_level,</div>
<div class="line"><a name="l00239"></a><span class="lineno"> 239</span>  <span class="keywordtype">double</span> lfe_mix_level, <span class="keywordtype">int</span> normalize, <span class="keywordtype">double</span> *matrix,</div>
<div class="line"><a name="l00240"></a><span class="lineno"> 240</span>  <span class="keywordtype">int</span> stride, <span class="keyword">enum</span> <a class="code" href="group__channel__mask__c.html#gabd576ea664e3ac5d31f3362064fe13e6">AVMatrixEncoding</a> matrix_encoding);</div>
<div class="line"><a name="l00241"></a><span class="lineno"> 241</span> <span class="comment"></span></div>
<div class="line"><a name="l00242"></a><span class="lineno"> 242</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00243"></a><span class="lineno"> 243</span> <span class="comment"> * Get the current channel mixing matrix.</span></div>
<div class="line"><a name="l00244"></a><span class="lineno"> 244</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00245"></a><span class="lineno"> 245</span> <span class="comment"> * If no custom matrix has been previously set or the AVAudioResampleContext is</span></div>
<div class="line"><a name="l00246"></a><span class="lineno"> 246</span> <span class="comment"> * not open, an error is returned.</span></div>
<div class="line"><a name="l00247"></a><span class="lineno"> 247</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00248"></a><span class="lineno"> 248</span> <span class="comment"> * @param avr audio resample context</span></div>
<div class="line"><a name="l00249"></a><span class="lineno"> 249</span> <span class="comment"> * @param matrix mixing coefficients; matrix[i + stride * o] is the weight of</span></div>
<div class="line"><a name="l00250"></a><span class="lineno"> 250</span> <span class="comment"> * input channel i in output channel o.</span></div>
<div class="line"><a name="l00251"></a><span class="lineno"> 251</span> <span class="comment"> * @param stride distance between adjacent input channels in the matrix array</span></div>
<div class="line"><a name="l00252"></a><span class="lineno"> 252</span> <span class="comment"> * @return 0 on success, negative AVERROR code on failure</span></div>
<div class="line"><a name="l00253"></a><span class="lineno"> 253</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00254"></a><span class="lineno"> 254</span> <span class="keywordtype">int</span> <a class="code" href="group__lavr.html#ga74d920b2dd1af265d7186a33f60e08e0">avresample_get_matrix</a>(<a class="code" href="group__lavr.html#gabe4ee61779da95d51dff716ef5b275a3">AVAudioResampleContext</a> *avr, <span class="keywordtype">double</span> *matrix,</div>
<div class="line"><a name="l00255"></a><span class="lineno"> 255</span>  <span class="keywordtype">int</span> stride);</div>
<div class="line"><a name="l00256"></a><span class="lineno"> 256</span> <span class="comment"></span></div>
<div class="line"><a name="l00257"></a><span class="lineno"> 257</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00258"></a><span class="lineno"> 258</span> <span class="comment"> * Set channel mixing matrix.</span></div>
<div class="line"><a name="l00259"></a><span class="lineno"> 259</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00260"></a><span class="lineno"> 260</span> <span class="comment"> * Allows for setting a custom mixing matrix, overriding the default matrix</span></div>
<div class="line"><a name="l00261"></a><span class="lineno"> 261</span> <span class="comment"> * generated internally during avresample_open(). This function can be called</span></div>
<div class="line"><a name="l00262"></a><span class="lineno"> 262</span> <span class="comment"> * anytime on an allocated context, either before or after calling</span></div>
<div class="line"><a name="l00263"></a><span class="lineno"> 263</span> <span class="comment"> * avresample_open(), as long as the channel layouts have been set.</span></div>
<div class="line"><a name="l00264"></a><span class="lineno"> 264</span> <span class="comment"> * avresample_convert() always uses the current matrix.</span></div>
<div class="line"><a name="l00265"></a><span class="lineno"> 265</span> <span class="comment"> * Calling avresample_close() on the context will clear the current matrix.</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> <span class="comment"> * @see avresample_close()</span></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"> * @param avr audio resample context</span></div>
<div class="line"><a name="l00270"></a><span class="lineno"> 270</span> <span class="comment"> * @param matrix mixing coefficients; matrix[i + stride * o] is the weight of</span></div>
<div class="line"><a name="l00271"></a><span class="lineno"> 271</span> <span class="comment"> * input channel i in output channel o.</span></div>
<div class="line"><a name="l00272"></a><span class="lineno"> 272</span> <span class="comment"> * @param stride distance between adjacent input channels in the matrix array</span></div>
<div class="line"><a name="l00273"></a><span class="lineno"> 273</span> <span class="comment"> * @return 0 on success, negative AVERROR code on failure</span></div>
<div class="line"><a name="l00274"></a><span class="lineno"> 274</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00275"></a><span class="lineno"> 275</span> <span class="keywordtype">int</span> <a class="code" href="group__lavr.html#ga3311c71aa573523c04882809143a9107">avresample_set_matrix</a>(<a class="code" href="group__lavr.html#gabe4ee61779da95d51dff716ef5b275a3">AVAudioResampleContext</a> *avr, <span class="keyword">const</span> <span class="keywordtype">double</span> *matrix,</div>
<div class="line"><a name="l00276"></a><span class="lineno"> 276</span>  <span class="keywordtype">int</span> stride);</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">/**</span></div>
<div class="line"><a name="l00279"></a><span class="lineno"> 279</span> <span class="comment"> * Set a customized input channel mapping.</span></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"> * This function can only be called when the allocated context is not open.</span></div>
<div class="line"><a name="l00282"></a><span class="lineno"> 282</span> <span class="comment"> * Also, the input channel layout must have already been set.</span></div>
<div class="line"><a name="l00283"></a><span class="lineno"> 283</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00284"></a><span class="lineno"> 284</span> <span class="comment"> * Calling avresample_close() on the context will clear the channel mapping.</span></div>
<div class="line"><a name="l00285"></a><span class="lineno"> 285</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00286"></a><span class="lineno"> 286</span> <span class="comment"> * The map for each input channel specifies the channel index in the source to</span></div>
<div class="line"><a name="l00287"></a><span class="lineno"> 287</span> <span class="comment"> * use for that particular channel, or -1 to mute the channel. Source channels</span></div>
<div class="line"><a name="l00288"></a><span class="lineno"> 288</span> <span class="comment"> * can be duplicated by using the same index for multiple input channels.</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"> * Examples:</span></div>
<div class="line"><a name="l00291"></a><span class="lineno"> 291</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00292"></a><span class="lineno"> 292</span> <span class="comment"> * Reordering 5.1 AAC order (C,L,R,Ls,Rs,LFE) to FFmpeg order (L,R,C,LFE,Ls,Rs):</span></div>
<div class="line"><a name="l00293"></a><span class="lineno"> 293</span> <span class="comment"> * { 1, 2, 0, 5, 3, 4 }</span></div>
<div class="line"><a name="l00294"></a><span class="lineno"> 294</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00295"></a><span class="lineno"> 295</span> <span class="comment"> * Muting the 3rd channel in 4-channel input:</span></div>
<div class="line"><a name="l00296"></a><span class="lineno"> 296</span> <span class="comment"> * { 0, 1, -1, 3 }</span></div>
<div class="line"><a name="l00297"></a><span class="lineno"> 297</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00298"></a><span class="lineno"> 298</span> <span class="comment"> * Duplicating the left channel of stereo input:</span></div>
<div class="line"><a name="l00299"></a><span class="lineno"> 299</span> <span class="comment"> * { 0, 0 }</span></div>
<div class="line"><a name="l00300"></a><span class="lineno"> 300</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00301"></a><span class="lineno"> 301</span> <span class="comment"> * @param avr audio resample context</span></div>
<div class="line"><a name="l00302"></a><span class="lineno"> 302</span> <span class="comment"> * @param channel_map customized input channel mapping</span></div>
<div class="line"><a name="l00303"></a><span class="lineno"> 303</span> <span class="comment"> * @return 0 on success, negative AVERROR code on failure</span></div>
<div class="line"><a name="l00304"></a><span class="lineno"> 304</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00305"></a><span class="lineno"> 305</span> <span class="keywordtype">int</span> <a class="code" href="group__lavr.html#gafc3b3ffa44345e07babdd69267527cfc">avresample_set_channel_mapping</a>(<a class="code" href="group__lavr.html#gabe4ee61779da95d51dff716ef5b275a3">AVAudioResampleContext</a> *avr,</div>
<div class="line"><a name="l00306"></a><span class="lineno"> 306</span>  <span class="keyword">const</span> <span class="keywordtype">int</span> *channel_map);</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">/**</span></div>
<div class="line"><a name="l00309"></a><span class="lineno"> 309</span> <span class="comment"> * Set compensation for resampling.</span></div>
<div class="line"><a name="l00310"></a><span class="lineno"> 310</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00311"></a><span class="lineno"> 311</span> <span class="comment"> * This can be called anytime after avresample_open(). If resampling is not</span></div>
<div class="line"><a name="l00312"></a><span class="lineno"> 312</span> <span class="comment"> * automatically enabled because of a sample rate conversion, the</span></div>
<div class="line"><a name="l00313"></a><span class="lineno"> 313</span> <span class="comment"> * "force_resampling" option must have been set to 1 when opening the context</span></div>
<div class="line"><a name="l00314"></a><span class="lineno"> 314</span> <span class="comment"> * in order to use resampling compensation.</span></div>
<div class="line"><a name="l00315"></a><span class="lineno"> 315</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00316"></a><span class="lineno"> 316</span> <span class="comment"> * @param avr audio resample context</span></div>
<div class="line"><a name="l00317"></a><span class="lineno"> 317</span> <span class="comment"> * @param sample_delta compensation delta, in samples</span></div>
<div class="line"><a name="l00318"></a><span class="lineno"> 318</span> <span class="comment"> * @param compensation_distance compensation distance, in samples</span></div>
<div class="line"><a name="l00319"></a><span class="lineno"> 319</span> <span class="comment"> * @return 0 on success, negative AVERROR code on failure</span></div>
<div class="line"><a name="l00320"></a><span class="lineno"> 320</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00321"></a><span class="lineno"> 321</span> <span class="keywordtype">int</span> <a class="code" href="group__lavr.html#ga2c7722a7b56ed3c4a44174611316d6ab">avresample_set_compensation</a>(<a class="code" href="group__lavr.html#gabe4ee61779da95d51dff716ef5b275a3">AVAudioResampleContext</a> *avr, <span class="keywordtype">int</span> sample_delta,</div>
<div class="line"><a name="l00322"></a><span class="lineno"> 322</span>  <span class="keywordtype">int</span> compensation_distance);</div>
<div class="line"><a name="l00323"></a><span class="lineno"> 323</span> <span class="comment"></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"> * Provide the upper bound on the number of samples the configured</span></div>
<div class="line"><a name="l00326"></a><span class="lineno"> 326</span> <span class="comment"> * conversion would output.</span></div>
<div class="line"><a name="l00327"></a><span class="lineno"> 327</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00328"></a><span class="lineno"> 328</span> <span class="comment"> * @param avr audio resample context</span></div>
<div class="line"><a name="l00329"></a><span class="lineno"> 329</span> <span class="comment"> * @param in_nb_samples number of input samples</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="comment"> * @return number of samples or AVERROR(EINVAL) if the value</span></div>
<div class="line"><a name="l00332"></a><span class="lineno"> 332</span> <span class="comment"> * would exceed INT_MAX</span></div>
<div class="line"><a name="l00333"></a><span class="lineno"> 333</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00334"></a><span class="lineno"> 334</span> </div>
<div class="line"><a name="l00335"></a><span class="lineno"> 335</span> <span class="keywordtype">int</span> <a class="code" href="group__lavr.html#ga16a346512f238e128ba567209b7ac103">avresample_get_out_samples</a>(<a class="code" href="group__lavr.html#gabe4ee61779da95d51dff716ef5b275a3">AVAudioResampleContext</a> *avr, <span class="keywordtype">int</span> in_nb_samples);</div>
<div class="line"><a name="l00336"></a><span class="lineno"> 336</span> <span class="comment"></span></div>
<div class="line"><a name="l00337"></a><span class="lineno"> 337</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00338"></a><span class="lineno"> 338</span> <span class="comment"> * Convert input samples and write them to the output FIFO.</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"> * The upper bound on the number of output samples can be obtained through</span></div>
<div class="line"><a name="l00341"></a><span class="lineno"> 341</span> <span class="comment"> * avresample_get_out_samples().</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="comment"> * The output data can be NULL or have fewer allocated samples than required.</span></div>
<div class="line"><a name="l00344"></a><span class="lineno"> 344</span> <span class="comment"> * In this case, any remaining samples not written to the output will be added</span></div>
<div class="line"><a name="l00345"></a><span class="lineno"> 345</span> <span class="comment"> * to an internal FIFO buffer, to be returned at the next call to this function</span></div>
<div class="line"><a name="l00346"></a><span class="lineno"> 346</span> <span class="comment"> * or to avresample_read().</span></div>
<div class="line"><a name="l00347"></a><span class="lineno"> 347</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00348"></a><span class="lineno"> 348</span> <span class="comment"> * If converting sample rate, there may be data remaining in the internal</span></div>
<div class="line"><a name="l00349"></a><span class="lineno"> 349</span> <span class="comment"> * resampling delay buffer. avresample_get_delay() tells the number of remaining</span></div>
<div class="line"><a name="l00350"></a><span class="lineno"> 350</span> <span class="comment"> * samples. To get this data as output, call avresample_convert() with NULL</span></div>
<div class="line"><a name="l00351"></a><span class="lineno"> 351</span> <span class="comment"> * input.</span></div>
<div class="line"><a name="l00352"></a><span class="lineno"> 352</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00353"></a><span class="lineno"> 353</span> <span class="comment"> * At the end of the conversion process, there may be data remaining in the</span></div>
<div class="line"><a name="l00354"></a><span class="lineno"> 354</span> <span class="comment"> * internal FIFO buffer. avresample_available() tells the number of remaining</span></div>
<div class="line"><a name="l00355"></a><span class="lineno"> 355</span> <span class="comment"> * samples. To get this data as output, either call avresample_convert() with</span></div>
<div class="line"><a name="l00356"></a><span class="lineno"> 356</span> <span class="comment"> * NULL input or call avresample_read().</span></div>
<div class="line"><a name="l00357"></a><span class="lineno"> 357</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00358"></a><span class="lineno"> 358</span> <span class="comment"> * @see avresample_get_out_samples()</span></div>
<div class="line"><a name="l00359"></a><span class="lineno"> 359</span> <span class="comment"> * @see avresample_read()</span></div>
<div class="line"><a name="l00360"></a><span class="lineno"> 360</span> <span class="comment"> * @see avresample_get_delay()</span></div>
<div class="line"><a name="l00361"></a><span class="lineno"> 361</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00362"></a><span class="lineno"> 362</span> <span class="comment"> * @param avr audio resample context</span></div>
<div class="line"><a name="l00363"></a><span class="lineno"> 363</span> <span class="comment"> * @param output output data pointers</span></div>
<div class="line"><a name="l00364"></a><span class="lineno"> 364</span> <span class="comment"> * @param out_plane_size output plane size, in bytes.</span></div>
<div class="line"><a name="l00365"></a><span class="lineno"> 365</span> <span class="comment"> * This can be 0 if unknown, but that will lead to</span></div>
<div class="line"><a name="l00366"></a><span class="lineno"> 366</span> <span class="comment"> * optimized functions not being used directly on the</span></div>
<div class="line"><a name="l00367"></a><span class="lineno"> 367</span> <span class="comment"> * output, which could slow down some conversions.</span></div>
<div class="line"><a name="l00368"></a><span class="lineno"> 368</span> <span class="comment"> * @param out_samples maximum number of samples that the output buffer can hold</span></div>
<div class="line"><a name="l00369"></a><span class="lineno"> 369</span> <span class="comment"> * @param input input data pointers</span></div>
<div class="line"><a name="l00370"></a><span class="lineno"> 370</span> <span class="comment"> * @param in_plane_size input plane size, in bytes</span></div>
<div class="line"><a name="l00371"></a><span class="lineno"> 371</span> <span class="comment"> * This can be 0 if unknown, but that will lead to</span></div>
<div class="line"><a name="l00372"></a><span class="lineno"> 372</span> <span class="comment"> * optimized functions not being used directly on the</span></div>
<div class="line"><a name="l00373"></a><span class="lineno"> 373</span> <span class="comment"> * input, which could slow down some conversions.</span></div>
<div class="line"><a name="l00374"></a><span class="lineno"> 374</span> <span class="comment"> * @param in_samples number of input samples to convert</span></div>
<div class="line"><a name="l00375"></a><span class="lineno"> 375</span> <span class="comment"> * @return number of samples written to the output buffer,</span></div>
<div class="line"><a name="l00376"></a><span class="lineno"> 376</span> <span class="comment"> * not including converted samples added to the internal</span></div>
<div class="line"><a name="l00377"></a><span class="lineno"> 377</span> <span class="comment"> * output FIFO</span></div>
<div class="line"><a name="l00378"></a><span class="lineno"> 378</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00379"></a><span class="lineno"> 379</span> <span class="keywordtype">int</span> <a class="code" href="group__lavr.html#ga8cbfc7b1e858debd56a7bee6ad95698d">avresample_convert</a>(<a class="code" href="group__lavr.html#gabe4ee61779da95d51dff716ef5b275a3">AVAudioResampleContext</a> *avr, uint8_t **output,</div>
<div class="line"><a name="l00380"></a><span class="lineno"> 380</span>  <span class="keywordtype">int</span> out_plane_size, <span class="keywordtype">int</span> out_samples,</div>
<div class="line"><a name="l00381"></a><span class="lineno"> 381</span>  uint8_t * <span class="keyword">const</span> *input, <span class="keywordtype">int</span> in_plane_size,</div>
<div class="line"><a name="l00382"></a><span class="lineno"> 382</span>  <span class="keywordtype">int</span> in_samples);</div>
<div class="line"><a name="l00383"></a><span class="lineno"> 383</span> <span class="comment"></span></div>
<div class="line"><a name="l00384"></a><span class="lineno"> 384</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00385"></a><span class="lineno"> 385</span> <span class="comment"> * Return the number of samples currently in the resampling delay buffer.</span></div>
<div class="line"><a name="l00386"></a><span class="lineno"> 386</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00387"></a><span class="lineno"> 387</span> <span class="comment"> * When resampling, there may be a delay between the input and output. Any</span></div>
<div class="line"><a name="l00388"></a><span class="lineno"> 388</span> <span class="comment"> * unconverted samples in each call are stored internally in a delay buffer.</span></div>
<div class="line"><a name="l00389"></a><span class="lineno"> 389</span> <span class="comment"> * This function allows the user to determine the current number of samples in</span></div>
<div class="line"><a name="l00390"></a><span class="lineno"> 390</span> <span class="comment"> * the delay buffer, which can be useful for synchronization.</span></div>
<div class="line"><a name="l00391"></a><span class="lineno"> 391</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00392"></a><span class="lineno"> 392</span> <span class="comment"> * @see avresample_convert()</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"> 394</span> <span class="comment"> * @param avr audio resample context</span></div>
<div class="line"><a name="l00395"></a><span class="lineno"> 395</span> <span class="comment"> * @return number of samples currently in the resampling delay buffer</span></div>
<div class="line"><a name="l00396"></a><span class="lineno"> 396</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00397"></a><span class="lineno"> 397</span> <span class="keywordtype">int</span> <a class="code" href="group__lavr.html#ga66240ec48b20c7a688ea0cd5fae6db15">avresample_get_delay</a>(<a class="code" href="group__lavr.html#gabe4ee61779da95d51dff716ef5b275a3">AVAudioResampleContext</a> *avr);</div>
<div class="line"><a name="l00398"></a><span class="lineno"> 398</span> <span class="comment"></span></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"> * Return the number of available samples in the output FIFO.</span></div>
<div class="line"><a name="l00401"></a><span class="lineno"> 401</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00402"></a><span class="lineno"> 402</span> <span class="comment"> * During conversion, if the user does not specify an output buffer or</span></div>
<div class="line"><a name="l00403"></a><span class="lineno"> 403</span> <span class="comment"> * specifies an output buffer that is smaller than what is needed, remaining</span></div>
<div class="line"><a name="l00404"></a><span class="lineno"> 404</span> <span class="comment"> * samples that are not written to the output are stored to an internal FIFO</span></div>
<div class="line"><a name="l00405"></a><span class="lineno"> 405</span> <span class="comment"> * buffer. The samples in the FIFO can be read with avresample_read() or</span></div>
<div class="line"><a name="l00406"></a><span class="lineno"> 406</span> <span class="comment"> * avresample_convert().</span></div>
<div class="line"><a name="l00407"></a><span class="lineno"> 407</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00408"></a><span class="lineno"> 408</span> <span class="comment"> * @see avresample_read()</span></div>
<div class="line"><a name="l00409"></a><span class="lineno"> 409</span> <span class="comment"> * @see avresample_convert()</span></div>
<div class="line"><a name="l00410"></a><span class="lineno"> 410</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00411"></a><span class="lineno"> 411</span> <span class="comment"> * @param avr audio resample context</span></div>
<div class="line"><a name="l00412"></a><span class="lineno"> 412</span> <span class="comment"> * @return number of samples available for reading</span></div>
<div class="line"><a name="l00413"></a><span class="lineno"> 413</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00414"></a><span class="lineno"> 414</span> <span class="keywordtype">int</span> <a class="code" href="group__lavr.html#ga1ed549e1e347ab11bb81883b9ce6bca2">avresample_available</a>(<a class="code" href="group__lavr.html#gabe4ee61779da95d51dff716ef5b275a3">AVAudioResampleContext</a> *avr);</div>
<div class="line"><a name="l00415"></a><span class="lineno"> 415</span> <span class="comment"></span></div>
<div class="line"><a name="l00416"></a><span class="lineno"> 416</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00417"></a><span class="lineno"> 417</span> <span class="comment"> * Read samples from the output FIFO.</span></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"> * During conversion, if the user does not specify an output buffer or</span></div>
<div class="line"><a name="l00420"></a><span class="lineno"> 420</span> <span class="comment"> * specifies an output buffer that is smaller than what is needed, remaining</span></div>
<div class="line"><a name="l00421"></a><span class="lineno"> 421</span> <span class="comment"> * samples that are not written to the output are stored to an internal FIFO</span></div>
<div class="line"><a name="l00422"></a><span class="lineno"> 422</span> <span class="comment"> * buffer. This function can be used to read samples from that internal FIFO.</span></div>
<div class="line"><a name="l00423"></a><span class="lineno"> 423</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00424"></a><span class="lineno"> 424</span> <span class="comment"> * @see avresample_available()</span></div>
<div class="line"><a name="l00425"></a><span class="lineno"> 425</span> <span class="comment"> * @see avresample_convert()</span></div>
<div class="line"><a name="l00426"></a><span class="lineno"> 426</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00427"></a><span class="lineno"> 427</span> <span class="comment"> * @param avr audio resample context</span></div>
<div class="line"><a name="l00428"></a><span class="lineno"> 428</span> <span class="comment"> * @param output output data pointers. May be NULL, in which case</span></div>
<div class="line"><a name="l00429"></a><span class="lineno"> 429</span> <span class="comment"> * nb_samples of data is discarded from output FIFO.</span></div>
<div class="line"><a name="l00430"></a><span class="lineno"> 430</span> <span class="comment"> * @param nb_samples number of samples to read from the FIFO</span></div>
<div class="line"><a name="l00431"></a><span class="lineno"> 431</span> <span class="comment"> * @return the number of samples written to output</span></div>
<div class="line"><a name="l00432"></a><span class="lineno"> 432</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00433"></a><span class="lineno"> 433</span> <span class="keywordtype">int</span> <a class="code" href="group__lavr.html#gae115c3f6edea41ae634583737bc554f9">avresample_read</a>(<a class="code" href="group__lavr.html#gabe4ee61779da95d51dff716ef5b275a3">AVAudioResampleContext</a> *avr, uint8_t **output, <span class="keywordtype">int</span> nb_samples);</div>
<div class="line"><a name="l00434"></a><span class="lineno"> 434</span> <span class="comment"></span></div>
<div class="line"><a name="l00435"></a><span class="lineno"> 435</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00436"></a><span class="lineno"> 436</span> <span class="comment"> * Convert the samples in the input AVFrame and write them to the output AVFrame.</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"> * Input and output AVFrames must have channel_layout, sample_rate and format set.</span></div>
<div class="line"><a name="l00439"></a><span class="lineno"> 439</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00440"></a><span class="lineno"> 440</span> <span class="comment"> * The upper bound on the number of output samples is obtained through</span></div>
<div class="line"><a name="l00441"></a><span class="lineno"> 441</span> <span class="comment"> * avresample_get_out_samples().</span></div>
<div class="line"><a name="l00442"></a><span class="lineno"> 442</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00443"></a><span class="lineno"> 443</span> <span class="comment"> * If the output AVFrame does not have the data pointers allocated the nb_samples</span></div>
<div class="line"><a name="l00444"></a><span class="lineno"> 444</span> <span class="comment"> * field will be set using avresample_get_out_samples() and av_frame_get_buffer()</span></div>
<div class="line"><a name="l00445"></a><span class="lineno"> 445</span> <span class="comment"> * is called to allocate the frame.</span></div>
<div class="line"><a name="l00446"></a><span class="lineno"> 446</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00447"></a><span class="lineno"> 447</span> <span class="comment"> * The output AVFrame can be NULL or have fewer allocated samples than required.</span></div>
<div class="line"><a name="l00448"></a><span class="lineno"> 448</span> <span class="comment"> * In this case, any remaining samples not written to the output will be added</span></div>
<div class="line"><a name="l00449"></a><span class="lineno"> 449</span> <span class="comment"> * to an internal FIFO buffer, to be returned at the next call to this function</span></div>
<div class="line"><a name="l00450"></a><span class="lineno"> 450</span> <span class="comment"> * or to avresample_convert() or to avresample_read().</span></div>
<div class="line"><a name="l00451"></a><span class="lineno"> 451</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00452"></a><span class="lineno"> 452</span> <span class="comment"> * If converting sample rate, there may be data remaining in the internal</span></div>
<div class="line"><a name="l00453"></a><span class="lineno"> 453</span> <span class="comment"> * resampling delay buffer. avresample_get_delay() tells the number of</span></div>
<div class="line"><a name="l00454"></a><span class="lineno"> 454</span> <span class="comment"> * remaining samples. To get this data as output, call this function or</span></div>
<div class="line"><a name="l00455"></a><span class="lineno"> 455</span> <span class="comment"> * avresample_convert() with NULL input.</span></div>
<div class="line"><a name="l00456"></a><span class="lineno"> 456</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00457"></a><span class="lineno"> 457</span> <span class="comment"> * At the end of the conversion process, there may be data remaining in the</span></div>
<div class="line"><a name="l00458"></a><span class="lineno"> 458</span> <span class="comment"> * internal FIFO buffer. avresample_available() tells the number of remaining</span></div>
<div class="line"><a name="l00459"></a><span class="lineno"> 459</span> <span class="comment"> * samples. To get this data as output, either call this function or</span></div>
<div class="line"><a name="l00460"></a><span class="lineno"> 460</span> <span class="comment"> * avresample_convert() with NULL input or call avresample_read().</span></div>
<div class="line"><a name="l00461"></a><span class="lineno"> 461</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00462"></a><span class="lineno"> 462</span> <span class="comment"> * If the AVAudioResampleContext configuration does not match the output and</span></div>
<div class="line"><a name="l00463"></a><span class="lineno"> 463</span> <span class="comment"> * input AVFrame settings the conversion does not take place and depending on</span></div>
<div class="line"><a name="l00464"></a><span class="lineno"> 464</span> <span class="comment"> * which AVFrame is not matching AVERROR_OUTPUT_CHANGED, AVERROR_INPUT_CHANGED</span></div>
<div class="line"><a name="l00465"></a><span class="lineno"> 465</span> <span class="comment"> * or AVERROR_OUTPUT_CHANGED|AVERROR_INPUT_CHANGED is returned.</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="comment"> * @see avresample_get_out_samples()</span></div>
<div class="line"><a name="l00468"></a><span class="lineno"> 468</span> <span class="comment"> * @see avresample_available()</span></div>
<div class="line"><a name="l00469"></a><span class="lineno"> 469</span> <span class="comment"> * @see avresample_convert()</span></div>
<div class="line"><a name="l00470"></a><span class="lineno"> 470</span> <span class="comment"> * @see avresample_read()</span></div>
<div class="line"><a name="l00471"></a><span class="lineno"> 471</span> <span class="comment"> * @see avresample_get_delay()</span></div>
<div class="line"><a name="l00472"></a><span class="lineno"> 472</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00473"></a><span class="lineno"> 473</span> <span class="comment"> * @param avr audio resample context</span></div>
<div class="line"><a name="l00474"></a><span class="lineno"> 474</span> <span class="comment"> * @param output output AVFrame</span></div>
<div class="line"><a name="l00475"></a><span class="lineno"> 475</span> <span class="comment"> * @param input input AVFrame</span></div>
<div class="line"><a name="l00476"></a><span class="lineno"> 476</span> <span class="comment"> * @return 0 on success, AVERROR on failure or nonmatching</span></div>
<div class="line"><a name="l00477"></a><span class="lineno"> 477</span> <span class="comment"> * configuration.</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="keywordtype">int</span> <a class="code" href="group__lavr.html#gac3060330c9004aa7e88ba8d9d90b0689">avresample_convert_frame</a>(<a class="code" href="group__lavr.html#gabe4ee61779da95d51dff716ef5b275a3">AVAudioResampleContext</a> *avr,</div>
<div class="line"><a name="l00480"></a><span class="lineno"> 480</span>  <a class="code" href="structAVFrame.html">AVFrame</a> *output, <a class="code" href="structAVFrame.html">AVFrame</a> *input);</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="comment">/**</span></div>
<div class="line"><a name="l00483"></a><span class="lineno"> 483</span> <span class="comment"> * Configure or reconfigure the AVAudioResampleContext using the information</span></div>
<div class="line"><a name="l00484"></a><span class="lineno"> 484</span> <span class="comment"> * provided by the AVFrames.</span></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"> * The original resampling context is reset even on failure.</span></div>
<div class="line"><a name="l00487"></a><span class="lineno"> 487</span> <span class="comment"> * The function calls avresample_close() internally if the context is open.</span></div>
<div class="line"><a name="l00488"></a><span class="lineno"> 488</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00489"></a><span class="lineno"> 489</span> <span class="comment"> * @see avresample_open();</span></div>
<div class="line"><a name="l00490"></a><span class="lineno"> 490</span> <span class="comment"> * @see avresample_close();</span></div>
<div class="line"><a name="l00491"></a><span class="lineno"> 491</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00492"></a><span class="lineno"> 492</span> <span class="comment"> * @param avr audio resample context</span></div>
<div class="line"><a name="l00493"></a><span class="lineno"> 493</span> <span class="comment"> * @param output output AVFrame</span></div>
<div class="line"><a name="l00494"></a><span class="lineno"> 494</span> <span class="comment"> * @param input input AVFrame</span></div>
<div class="line"><a name="l00495"></a><span class="lineno"> 495</span> <span class="comment"> * @return 0 on success, AVERROR on failure.</span></div>
<div class="line"><a name="l00496"></a><span class="lineno"> 496</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00497"></a><span class="lineno"> 497</span> <span class="keywordtype">int</span> <a class="code" href="group__lavr.html#ga7528c331f29fc476b264b2de31f17f1e">avresample_config</a>(<a class="code" href="group__lavr.html#gabe4ee61779da95d51dff716ef5b275a3">AVAudioResampleContext</a> *avr, <a class="code" href="structAVFrame.html">AVFrame</a> *out, <a class="code" href="structAVFrame.html">AVFrame</a> *in);</div>
<div class="line"><a name="l00498"></a><span class="lineno"> 498</span> <span class="comment"></span></div>
<div class="line"><a name="l00499"></a><span class="lineno"> 499</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00500"></a><span class="lineno"> 500</span> <span class="comment"> * @}</span></div>
<div class="line"><a name="l00501"></a><span class="lineno"> 501</span> <span class="comment"> */</span></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="preprocessor">#endif </span><span class="comment">/* AVRESAMPLE_AVRESAMPLE_H */</span><span class="preprocessor"></span></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__lavr_html_gga3813087032c02f1e84f0ca2962b09400af552d08855b8a5f4b46f6328633c8f1f"><div class="ttname"><a href="group__lavr.html#gga3813087032c02f1e84f0ca2962b09400af552d08855b8a5f4b46f6328633c8f1f">AV_RESAMPLE_FILTER_TYPE_KAISER</a></div><div class="ttdoc">Kaiser Windowed Sinc. </div><div class="ttdef"><b>Definition:</b> <a href="avresample_8h_source.html#l00120">avresample.h:120</a></div></div>
<div class="ttc" id="group__lavr_html_gac3060330c9004aa7e88ba8d9d90b0689"><div class="ttname"><a href="group__lavr.html#gac3060330c9004aa7e88ba8d9d90b0689">avresample_convert_frame</a></div><div class="ttdeci">int avresample_convert_frame(AVAudioResampleContext *avr, AVFrame *output, AVFrame *input)</div><div class="ttdoc">Convert the samples in the input AVFrame and write them to the output AVFrame. </div></div>
<div class="ttc" id="group__lavr_html_ga8cbfc7b1e858debd56a7bee6ad95698d"><div class="ttname"><a href="group__lavr.html#ga8cbfc7b1e858debd56a7bee6ad95698d">avresample_convert</a></div><div class="ttdeci">int avresample_convert(AVAudioResampleContext *avr, uint8_t **output, int out_plane_size, int out_samples, uint8_t *const *input, int in_plane_size, int in_samples)</div><div class="ttdoc">Convert input samples and write them to the output FIFO. </div></div>
<div class="ttc" id="group__lavr_html_gga302491313b02acca1a822249caa8cb10a4f892b254f02b3ebf775169f786e966b"><div class="ttname"><a href="group__lavr.html#gga302491313b02acca1a822249caa8cb10a4f892b254f02b3ebf775169f786e966b">AV_RESAMPLE_DITHER_NONE</a></div><div class="ttdoc">Do not use dithering. </div><div class="ttdef"><b>Definition:</b> <a href="avresample_8h_source.html#l00124">avresample.h:124</a></div></div>
<div class="ttc" id="group__lavr_html_gae115c3f6edea41ae634583737bc554f9"><div class="ttname"><a href="group__lavr.html#gae115c3f6edea41ae634583737bc554f9">avresample_read</a></div><div class="ttdeci">int avresample_read(AVAudioResampleContext *avr, uint8_t **output, int nb_samples)</div><div class="ttdoc">Read samples from the output FIFO. </div></div>
<div class="ttc" id="avutil_8h_html"><div class="ttname"><a href="avutil_8h.html">avutil.h</a></div><div class="ttdoc">external API header </div></div>
<div class="ttc" id="group__lavr_html_ga2c7722a7b56ed3c4a44174611316d6ab"><div class="ttname"><a href="group__lavr.html#ga2c7722a7b56ed3c4a44174611316d6ab">avresample_set_compensation</a></div><div class="ttdeci">int avresample_set_compensation(AVAudioResampleContext *avr, int sample_delta, int compensation_distance)</div><div class="ttdoc">Set compensation for resampling. </div></div>
<div class="ttc" id="group__lavr_html_ggaaaa652e3ad8554a0dca126e8571735ddab01d45f335057a1f930b0b677adb3a60"><div class="ttname"><a href="group__lavr.html#ggaaaa652e3ad8554a0dca126e8571735ddab01d45f335057a1f930b0b677adb3a60">AV_MIX_COEFF_TYPE_Q8</a></div><div class="ttdef"><b>Definition:</b> <a href="avresample_8h_source.html#l00110">avresample.h:110</a></div></div>
<div class="ttc" id="group__lavr_html_ggaaaa652e3ad8554a0dca126e8571735dda5d6c3ee92cc045714ac2ec4c83588841"><div class="ttname"><a href="group__lavr.html#ggaaaa652e3ad8554a0dca126e8571735dda5d6c3ee92cc045714ac2ec4c83588841">AV_MIX_COEFF_TYPE_FLT</a></div><div class="ttdoc">32-bit 17.15 fixed-point </div><div class="ttdef"><b>Definition:</b> <a href="avresample_8h_source.html#l00112">avresample.h:112</a></div></div>
<div class="ttc" id="group__lavr_html_gafc3b3ffa44345e07babdd69267527cfc"><div class="ttname"><a href="group__lavr.html#gafc3b3ffa44345e07babdd69267527cfc">avresample_set_channel_mapping</a></div><div class="ttdeci">int avresample_set_channel_mapping(AVAudioResampleContext *avr, const int *channel_map)</div><div class="ttdoc">Set a customized input channel mapping. </div></div>
<div class="ttc" id="group__lavr_html_ga1d0782fe9a331b823c6d0dda5dbc63a5"><div class="ttname"><a href="group__lavr.html#ga1d0782fe9a331b823c6d0dda5dbc63a5">avresample_free</a></div><div class="ttdeci">void avresample_free(AVAudioResampleContext **avr)</div><div class="ttdoc">Free AVAudioResampleContext and associated AVOption values. </div></div>
<div class="ttc" id="group__lavr_html_gga302491313b02acca1a822249caa8cb10aa1abacc1c6e8c448959bc49316b8f566"><div class="ttname"><a href="group__lavr.html#gga302491313b02acca1a822249caa8cb10aa1abacc1c6e8c448959bc49316b8f566">AV_RESAMPLE_DITHER_TRIANGULAR_NS</a></div><div class="ttdoc">Triangular Dither with Noise Shaping. </div><div class="ttdef"><b>Definition:</b> <a href="avresample_8h_source.html#l00128">avresample.h:128</a></div></div>
<div class="ttc" id="group__lavr_html_ga40d8eeb3181386e30e5b02289e469a73"><div class="ttname"><a href="group__lavr.html#ga40d8eeb3181386e30e5b02289e469a73">avresample_get_class</a></div><div class="ttdeci">const AVClass * avresample_get_class(void)</div><div class="ttdoc">Get the AVClass for AVAudioResampleContext. </div></div>
<div class="ttc" id="mathematics_8h_html"><div class="ttname"><a href="mathematics_8h.html">mathematics.h</a></div></div>
<div class="ttc" id="group__lavr_html_gga302491313b02acca1a822249caa8cb10a6e6841e6042d8059db5fdebe67d783ad"><div class="ttname"><a href="group__lavr.html#gga302491313b02acca1a822249caa8cb10a6e6841e6042d8059db5fdebe67d783ad">AV_RESAMPLE_DITHER_RECTANGULAR</a></div><div class="ttdoc">Rectangular Dither. </div><div class="ttdef"><b>Definition:</b> <a href="avresample_8h_source.html#l00125">avresample.h:125</a></div></div>
<div class="ttc" id="group__lavr_html_gga302491313b02acca1a822249caa8cb10a261d5a5101aeff5e7ff5813787481bd6"><div class="ttname"><a href="group__lavr.html#gga302491313b02acca1a822249caa8cb10a261d5a5101aeff5e7ff5813787481bd6">AV_RESAMPLE_DITHER_TRIANGULAR_HP</a></div><div class="ttdoc">Triangular Dither with High Pass. </div><div class="ttdef"><b>Definition:</b> <a href="avresample_8h_source.html#l00127">avresample.h:127</a></div></div>
<div class="ttc" id="dict_8h_html"><div class="ttname"><a href="dict_8h.html">dict.h</a></div><div class="ttdoc">Public dictionary API. </div></div>
<div class="ttc" id="group__lavr_html_ga7e3794756514c6ccf42580c2a840d16c"><div class="ttname"><a href="group__lavr.html#ga7e3794756514c6ccf42580c2a840d16c">avresample_license</a></div><div class="ttdeci">const char * avresample_license(void)</div><div class="ttdoc">Return the libavresample license. </div></div>
<div class="ttc" id="group__lavr_html_ga496a46260f4a5f5854ecc21f0f0011c8"><div class="ttname"><a href="group__lavr.html#ga496a46260f4a5f5854ecc21f0f0011c8">avresample_build_matrix</a></div><div class="ttdeci">int avresample_build_matrix(uint64_t in_layout, uint64_t out_layout, double center_mix_level, double surround_mix_level, double lfe_mix_level, int normalize, double *matrix, int stride, enum AVMatrixEncoding matrix_encoding)</div><div class="ttdoc">Generate a channel mixing matrix. </div></div>
<div class="ttc" id="group__lavr_html_ga30751a8c6923418a090281669362bf79"><div class="ttname"><a href="group__lavr.html#ga30751a8c6923418a090281669362bf79">avresample_close</a></div><div class="ttdeci">void avresample_close(AVAudioResampleContext *avr)</div><div class="ttdoc">Close AVAudioResampleContext. </div></div>
<div class="ttc" id="group__lavr_html_ga3813087032c02f1e84f0ca2962b09400"><div class="ttname"><a href="group__lavr.html#ga3813087032c02f1e84f0ca2962b09400">AVResampleFilterType</a></div><div class="ttdeci">AVResampleFilterType</div><div class="ttdoc">Resampling Filter Types. </div><div class="ttdef"><b>Definition:</b> <a href="avresample_8h_source.html#l00117">avresample.h:117</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="group__lavr_html_ga7528c331f29fc476b264b2de31f17f1e"><div class="ttname"><a href="group__lavr.html#ga7528c331f29fc476b264b2de31f17f1e">avresample_config</a></div><div class="ttdeci">int avresample_config(AVAudioResampleContext *avr, AVFrame *out, AVFrame *in)</div><div class="ttdoc">Configure or reconfigure the AVAudioResampleContext using the information provided by the AVFrames...</div></div>
<div class="ttc" id="channel__layout_8h_html"><div class="ttname"><a href="channel__layout_8h.html">channel_layout.h</a></div><div class="ttdoc">audio channel layout utility functions </div></div>
<div class="ttc" id="group__lavr_html_ga3311c71aa573523c04882809143a9107"><div class="ttname"><a href="group__lavr.html#ga3311c71aa573523c04882809143a9107">avresample_set_matrix</a></div><div class="ttdeci">int avresample_set_matrix(AVAudioResampleContext *avr, const double *matrix, int stride)</div><div class="ttdoc">Set channel mixing matrix. </div></div>
<div class="ttc" id="group__lavr_html_gga302491313b02acca1a822249caa8cb10a4d9b50692d2a3cdf6c3cfeb7f14ccfc6"><div class="ttname"><a href="group__lavr.html#gga302491313b02acca1a822249caa8cb10a4d9b50692d2a3cdf6c3cfeb7f14ccfc6">AV_RESAMPLE_DITHER_TRIANGULAR</a></div><div class="ttdoc">Triangular Dither. </div><div class="ttdef"><b>Definition:</b> <a href="avresample_8h_source.html#l00126">avresample.h:126</a></div></div>
<div class="ttc" id="group__lavr_html_ga66240ec48b20c7a688ea0cd5fae6db15"><div class="ttname"><a href="group__lavr.html#ga66240ec48b20c7a688ea0cd5fae6db15">avresample_get_delay</a></div><div class="ttdeci">int avresample_get_delay(AVAudioResampleContext *avr)</div><div class="ttdoc">Return the number of samples currently in the resampling delay buffer. </div></div>
<div class="ttc" id="group__lavr_html_ga74d920b2dd1af265d7186a33f60e08e0"><div class="ttname"><a href="group__lavr.html#ga74d920b2dd1af265d7186a33f60e08e0">avresample_get_matrix</a></div><div class="ttdeci">int avresample_get_matrix(AVAudioResampleContext *avr, double *matrix, int stride)</div><div class="ttdoc">Get the current channel mixing matrix. </div></div>
<div class="ttc" id="group__lavr_html_ga1ed549e1e347ab11bb81883b9ce6bca2"><div class="ttname"><a href="group__lavr.html#ga1ed549e1e347ab11bb81883b9ce6bca2">avresample_available</a></div><div class="ttdeci">int avresample_available(AVAudioResampleContext *avr)</div><div class="ttdoc">Return the number of available samples in the output FIFO. </div></div>
<div class="ttc" id="group__lavr_html_gabe4ee61779da95d51dff716ef5b275a3"><div class="ttname"><a href="group__lavr.html#gabe4ee61779da95d51dff716ef5b275a3">AVAudioResampleContext</a></div><div class="ttdeci">struct AVAudioResampleContext AVAudioResampleContext</div><div class="ttdef"><b>Definition:</b> <a href="avresample_8h_source.html#l00106">avresample.h:106</a></div></div>
<div class="ttc" id="group__lavr_html_ga16a346512f238e128ba567209b7ac103"><div class="ttname"><a href="group__lavr.html#ga16a346512f238e128ba567209b7ac103">avresample_get_out_samples</a></div><div class="ttdeci">int avresample_get_out_samples(AVAudioResampleContext *avr, int in_nb_samples)</div><div class="ttdoc">Provide the upper bound on the number of samples the configured conversion would output. </div></div>
<div class="ttc" id="group__lavr_html_ggaaaa652e3ad8554a0dca126e8571735dda2672ba31292b1fb0a861b035466964a9"><div class="ttname"><a href="group__lavr.html#ggaaaa652e3ad8554a0dca126e8571735dda2672ba31292b1fb0a861b035466964a9">AV_MIX_COEFF_TYPE_NB</a></div><div class="ttdoc">floating-point </div><div class="ttdef"><b>Definition:</b> <a href="avresample_8h_source.html#l00113">avresample.h:113</a></div></div>
<div class="ttc" id="group__lavr_html_ga59d94ba578f9d7a90fd5d82ee6f361b4"><div class="ttname"><a href="group__lavr.html#ga59d94ba578f9d7a90fd5d82ee6f361b4">avresample_configuration</a></div><div class="ttdeci">const char * avresample_configuration(void)</div><div class="ttdoc">Return the libavresample build-time configuration. </div></div>
<div class="ttc" id="structAVClass_html"><div class="ttname"><a href="structAVClass.html">AVClass</a></div><div class="ttdoc">Describe the class of an AVClass context structure. </div><div class="ttdef"><b>Definition:</b> <a href="log_8h_source.html#l00067">log.h:67</a></div></div>
<div class="ttc" id="group__lavr_html_gga3813087032c02f1e84f0ca2962b09400ac8d3b66c4c4bd02418ce0b882fb7d4fa"><div class="ttname"><a href="group__lavr.html#gga3813087032c02f1e84f0ca2962b09400ac8d3b66c4c4bd02418ce0b882fb7d4fa">AV_RESAMPLE_FILTER_TYPE_CUBIC</a></div><div class="ttdoc">Cubic. </div><div class="ttdef"><b>Definition:</b> <a href="avresample_8h_source.html#l00118">avresample.h:118</a></div></div>
<div class="ttc" id="group__lavr_html_gga3813087032c02f1e84f0ca2962b09400ace0cbc5bda3d6fa26b054b2fa7702886"><div class="ttname"><a href="group__lavr.html#gga3813087032c02f1e84f0ca2962b09400ace0cbc5bda3d6fa26b054b2fa7702886">AV_RESAMPLE_FILTER_TYPE_BLACKMAN_NUTTALL</a></div><div class="ttdoc">Blackman Nuttall Windowed Sinc. </div><div class="ttdef"><b>Definition:</b> <a href="avresample_8h_source.html#l00119">avresample.h:119</a></div></div>
<div class="ttc" id="group__lavr_html_gga302491313b02acca1a822249caa8cb10ac9e29d7f4af2590ba9a59429d88d57c0"><div class="ttname"><a href="group__lavr.html#gga302491313b02acca1a822249caa8cb10ac9e29d7f4af2590ba9a59429d88d57c0">AV_RESAMPLE_DITHER_NB</a></div><div class="ttdoc">Number of dither types. </div><div class="ttdef"><b>Definition:</b> <a href="avresample_8h_source.html#l00129">avresample.h:129</a></div></div>
<div class="ttc" id="group__lavr_html_ga5b1bcb7a35446a07ce330a0ca2b38b72"><div class="ttname"><a href="group__lavr.html#ga5b1bcb7a35446a07ce330a0ca2b38b72">avresample_alloc_context</a></div><div class="ttdeci">AVAudioResampleContext * avresample_alloc_context(void)</div><div class="ttdoc">Allocate AVAudioResampleContext and set options. </div></div>
<div class="ttc" id="group__lavr_html_ggaaaa652e3ad8554a0dca126e8571735ddaf459c8599c850abd5d0308cd8609af68"><div class="ttname"><a href="group__lavr.html#ggaaaa652e3ad8554a0dca126e8571735ddaf459c8599c850abd5d0308cd8609af68">AV_MIX_COEFF_TYPE_Q15</a></div><div class="ttdoc">16-bit 8.8 fixed-point </div><div class="ttdef"><b>Definition:</b> <a href="avresample_8h_source.html#l00111">avresample.h:111</a></div></div>
<div class="ttc" id="group__lavr_html_ga56519a7b3646ca435e64cb247c173c60"><div class="ttname"><a href="group__lavr.html#ga56519a7b3646ca435e64cb247c173c60">avresample_is_open</a></div><div class="ttdeci">int avresample_is_open(AVAudioResampleContext *avr)</div><div class="ttdoc">Check whether an AVAudioResampleContext is open or closed. </div></div>
<div class="ttc" id="group__lavr_html_gaaaa652e3ad8554a0dca126e8571735dd"><div class="ttname"><a href="group__lavr.html#gaaaa652e3ad8554a0dca126e8571735dd">AVMixCoeffType</a></div><div class="ttdeci">AVMixCoeffType</div><div class="ttdoc">Mixing Coefficient Types. </div><div class="ttdef"><b>Definition:</b> <a href="avresample_8h_source.html#l00109">avresample.h:109</a></div></div>
<div class="ttc" id="group__lavr_html_gaedabbb0590c33b7b9ce1ce213629dd3e"><div class="ttname"><a href="group__lavr.html#gaedabbb0590c33b7b9ce1ce213629dd3e">avresample_version</a></div><div class="ttdeci">unsigned avresample_version(void)</div><div class="ttdoc">Return the LIBAVRESAMPLE_VERSION_INT constant. </div></div>
<div class="ttc" id="log_8h_html"><div class="ttname"><a href="log_8h.html">log.h</a></div></div>
<div class="ttc" id="group__channel__mask__c_html_gabd576ea664e3ac5d31f3362064fe13e6"><div class="ttname"><a href="group__channel__mask__c.html#gabd576ea664e3ac5d31f3362064fe13e6">AVMatrixEncoding</a></div><div class="ttdeci">AVMatrixEncoding</div><div class="ttdef"><b>Definition:</b> <a href="channel__layout_8h_source.html#l00114">channel_layout.h:114</a></div></div>
<div class="ttc" id="libavresample_2version_8h_html"><div class="ttname"><a href="libavresample_2version_8h.html">version.h</a></div><div class="ttdoc">Libavresample version macros. </div></div>
<div class="ttc" id="group__lavr_html_ga302491313b02acca1a822249caa8cb10"><div class="ttname"><a href="group__lavr.html#ga302491313b02acca1a822249caa8cb10">AVResampleDitherMethod</a></div><div class="ttdeci">AVResampleDitherMethod</div><div class="ttdef"><b>Definition:</b> <a href="avresample_8h_source.html#l00123">avresample.h:123</a></div></div>
<div class="ttc" id="group__lavr_html_gafc59c68689be880494ff24d10fd85143"><div class="ttname"><a href="group__lavr.html#gafc59c68689be880494ff24d10fd85143">avresample_open</a></div><div class="ttdeci">int avresample_open(AVAudioResampleContext *avr)</div><div class="ttdoc">Initialize AVAudioResampleContext. </div></div>
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