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<li class="navelem"><a class="el" href="dir_8d855866ba5d436d839c7fc557836cd9.html">libavutil</a></li> </ul>
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<div class="title">audio_fifo.h</div> </div>
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<a href="audio__fifo_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"> * Audio FIFO</span></div>
<div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment"> * Copyright (c) 2012 Justin Ruggles <justin.ruggles@gmail.com></span></div>
<div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment"> * This file is part of FFmpeg.</span></div>
<div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment"> * FFmpeg is free software; you can redistribute it and/or</span></div>
<div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment"> * modify it under the terms of the GNU Lesser General Public</span></div>
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment"> * License as published by the Free Software Foundation; either</span></div>
<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment"> * version 2.1 of the License, or (at your option) any later version.</span></div>
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment"> * FFmpeg is distributed in the hope that it will be useful,</span></div>
<div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="comment"> * but WITHOUT ANY WARRANTY; without even the implied warranty of</span></div>
<div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="comment"> * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU</span></div>
<div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="comment"> * Lesser General Public License for more details.</span></div>
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="comment"> * You should have received a copy of the GNU Lesser General Public</span></div>
<div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="comment"> * License along with FFmpeg; if not, write to the Free Software</span></div>
<div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="comment"> * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA</span></div>
<div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="comment"></span></div>
<div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="comment"> * @file</span></div>
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span> <span class="comment"> * Audio FIFO Buffer</span></div>
<div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00026"></a><span class="lineno"> 26</span> </div>
<div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="preprocessor">#ifndef AVUTIL_AUDIO_FIFO_H</span></div>
<div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="preprocessor"></span><span class="preprocessor">#define AVUTIL_AUDIO_FIFO_H</span></div>
<div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="preprocessor">#include "<a class="code" href="avutil_8h.html">avutil.h</a>"</span></div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="preprocessor">#include "<a class="code" href="fifo_8h.html">fifo.h</a>"</span></div>
<div class="line"><a name="l00032"></a><span class="lineno"> 32</span> <span class="preprocessor">#include "<a class="code" href="samplefmt_8h.html">samplefmt.h</a>"</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">/**</span></div>
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span> <span class="comment"> * @addtogroup lavu_audio</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"> *</span></div>
<div class="line"><a name="l00038"></a><span class="lineno"> 38</span> <span class="comment"> * @defgroup lavu_audiofifo Audio FIFO Buffer</span></div>
<div class="line"><a name="l00039"></a><span class="lineno"> 39</span> <span class="comment"> * @{</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"></span></div>
<div class="line"><a name="l00042"></a><span class="lineno"> 42</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00043"></a><span class="lineno"> 43</span> <span class="comment"> * Context for an Audio FIFO Buffer.</span></div>
<div class="line"><a name="l00044"></a><span class="lineno"> 44</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00045"></a><span class="lineno"> 45</span> <span class="comment"> * - Operates at the sample level rather than the byte level.</span></div>
<div class="line"><a name="l00046"></a><span class="lineno"> 46</span> <span class="comment"> * - Supports multiple channels with either planar or packed sample format.</span></div>
<div class="line"><a name="l00047"></a><span class="lineno"> 47</span> <span class="comment"> * - Automatic reallocation when writing to a full buffer.</span></div>
<div class="line"><a name="l00048"></a><span class="lineno"> 48</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00049"></a><span class="lineno"><a class="line" href="group__lavu__audiofifo.html#ga328abb21e9abb2c455d2d9c212d5230f"> 49</a></span> <span class="keyword">typedef</span> <span class="keyword">struct </span><a class="code" href="group__lavu__audiofifo.html#ga328abb21e9abb2c455d2d9c212d5230f">AVAudioFifo</a> <a class="code" href="group__lavu__audiofifo.html#ga328abb21e9abb2c455d2d9c212d5230f">AVAudioFifo</a>;</div>
<div class="line"><a name="l00050"></a><span class="lineno"> 50</span> <span class="comment"></span></div>
<div class="line"><a name="l00051"></a><span class="lineno"> 51</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00052"></a><span class="lineno"> 52</span> <span class="comment"> * Free an AVAudioFifo.</span></div>
<div class="line"><a name="l00053"></a><span class="lineno"> 53</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00054"></a><span class="lineno"> 54</span> <span class="comment"> * @param af AVAudioFifo to free</span></div>
<div class="line"><a name="l00055"></a><span class="lineno"> 55</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00056"></a><span class="lineno"> 56</span> <span class="keywordtype">void</span> <a class="code" href="group__lavu__audiofifo.html#ga74e029e47f7aa99217ad1f315c434875">av_audio_fifo_free</a>(<a class="code" href="group__lavu__audiofifo.html#ga328abb21e9abb2c455d2d9c212d5230f">AVAudioFifo</a> *af);</div>
<div class="line"><a name="l00057"></a><span class="lineno"> 57</span> <span class="comment"></span></div>
<div class="line"><a name="l00058"></a><span class="lineno"> 58</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00059"></a><span class="lineno"> 59</span> <span class="comment"> * Allocate an AVAudioFifo.</span></div>
<div class="line"><a name="l00060"></a><span class="lineno"> 60</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00061"></a><span class="lineno"> 61</span> <span class="comment"> * @param sample_fmt sample format</span></div>
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span> <span class="comment"> * @param channels number of channels</span></div>
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span> <span class="comment"> * @param nb_samples initial allocation size, in samples</span></div>
<div class="line"><a name="l00064"></a><span class="lineno"> 64</span> <span class="comment"> * @return newly allocated AVAudioFifo, or NULL on error</span></div>
<div class="line"><a name="l00065"></a><span class="lineno"> 65</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00066"></a><span class="lineno"> 66</span> <a class="code" href="group__lavu__audiofifo.html#ga328abb21e9abb2c455d2d9c212d5230f">AVAudioFifo</a> *<a class="code" href="group__lavu__audiofifo.html#ga9d792394f0615a329aec47847f8f8784">av_audio_fifo_alloc</a>(<span class="keyword">enum</span> <a class="code" href="group__lavu__sampfmts.html#gaf9a51ca15301871723577c730b5865c5">AVSampleFormat</a> sample_fmt, <span class="keywordtype">int</span> channels,</div>
<div class="line"><a name="l00067"></a><span class="lineno"> 67</span>  <span class="keywordtype">int</span> nb_samples);</div>
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span> <span class="comment"></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"> * Reallocate an AVAudioFifo.</span></div>
<div class="line"><a name="l00071"></a><span class="lineno"> 71</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00072"></a><span class="lineno"> 72</span> <span class="comment"> * @param af AVAudioFifo to reallocate</span></div>
<div class="line"><a name="l00073"></a><span class="lineno"> 73</span> <span class="comment"> * @param nb_samples new allocation size, in samples</span></div>
<div class="line"><a name="l00074"></a><span class="lineno"> 74</span> <span class="comment"> * @return 0 if OK, or negative AVERROR code on failure</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> <a class="code" href="attributes_8h.html#a93f17e0f0b53a66e7b5eceb3dff2918f">av_warn_unused_result</a></div>
<div class="line"><a name="l00077"></a><span class="lineno"> 77</span> <span class="keywordtype">int</span> <a class="code" href="group__lavu__audiofifo.html#ga27c1e16e5f09940d6016b1971c0b5742">av_audio_fifo_realloc</a>(<a class="code" href="group__lavu__audiofifo.html#ga328abb21e9abb2c455d2d9c212d5230f">AVAudioFifo</a> *af, <span class="keywordtype">int</span> nb_samples);</div>
<div class="line"><a name="l00078"></a><span class="lineno"> 78</span> <span class="comment"></span></div>
<div class="line"><a name="l00079"></a><span class="lineno"> 79</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00080"></a><span class="lineno"> 80</span> <span class="comment"> * Write data to an AVAudioFifo.</span></div>
<div class="line"><a name="l00081"></a><span class="lineno"> 81</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00082"></a><span class="lineno"> 82</span> <span class="comment"> * The AVAudioFifo will be reallocated automatically if the available space</span></div>
<div class="line"><a name="l00083"></a><span class="lineno"> 83</span> <span class="comment"> * is less than nb_samples.</span></div>
<div class="line"><a name="l00084"></a><span class="lineno"> 84</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00085"></a><span class="lineno"> 85</span> <span class="comment"> * @see enum AVSampleFormat</span></div>
<div class="line"><a name="l00086"></a><span class="lineno"> 86</span> <span class="comment"> * The documentation for AVSampleFormat describes the data layout.</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"> * @param af AVAudioFifo to write to</span></div>
<div class="line"><a name="l00089"></a><span class="lineno"> 89</span> <span class="comment"> * @param data audio data plane pointers</span></div>
<div class="line"><a name="l00090"></a><span class="lineno"> 90</span> <span class="comment"> * @param nb_samples number of samples to write</span></div>
<div class="line"><a name="l00091"></a><span class="lineno"> 91</span> <span class="comment"> * @return number of samples actually written, or negative AVERROR</span></div>
<div class="line"><a name="l00092"></a><span class="lineno"> 92</span> <span class="comment"> * code on failure. If successful, the number of samples</span></div>
<div class="line"><a name="l00093"></a><span class="lineno"> 93</span> <span class="comment"> * actually written will always be nb_samples.</span></div>
<div class="line"><a name="l00094"></a><span class="lineno"> 94</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00095"></a><span class="lineno"> 95</span> <span class="keywordtype">int</span> <a class="code" href="group__lavu__audiofifo.html#ga0e7fadeea09c52a96eb4082a9e169bb4">av_audio_fifo_write</a>(<a class="code" href="group__lavu__audiofifo.html#ga328abb21e9abb2c455d2d9c212d5230f">AVAudioFifo</a> *af, <span class="keywordtype">void</span> **data, <span class="keywordtype">int</span> nb_samples);</div>
<div class="line"><a name="l00096"></a><span class="lineno"> 96</span> <span class="comment"></span></div>
<div class="line"><a name="l00097"></a><span class="lineno"> 97</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00098"></a><span class="lineno"> 98</span> <span class="comment"> * Peek data from an AVAudioFifo.</span></div>
<div class="line"><a name="l00099"></a><span class="lineno"> 99</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00100"></a><span class="lineno"> 100</span> <span class="comment"> * @see enum AVSampleFormat</span></div>
<div class="line"><a name="l00101"></a><span class="lineno"> 101</span> <span class="comment"> * The documentation for AVSampleFormat describes the data layout.</span></div>
<div class="line"><a name="l00102"></a><span class="lineno"> 102</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00103"></a><span class="lineno"> 103</span> <span class="comment"> * @param af AVAudioFifo to read from</span></div>
<div class="line"><a name="l00104"></a><span class="lineno"> 104</span> <span class="comment"> * @param data audio data plane pointers</span></div>
<div class="line"><a name="l00105"></a><span class="lineno"> 105</span> <span class="comment"> * @param nb_samples number of samples to peek</span></div>
<div class="line"><a name="l00106"></a><span class="lineno"> 106</span> <span class="comment"> * @return number of samples actually peek, or negative AVERROR code</span></div>
<div class="line"><a name="l00107"></a><span class="lineno"> 107</span> <span class="comment"> * on failure. The number of samples actually peek will not</span></div>
<div class="line"><a name="l00108"></a><span class="lineno"> 108</span> <span class="comment"> * be greater than nb_samples, and will only be less than</span></div>
<div class="line"><a name="l00109"></a><span class="lineno"> 109</span> <span class="comment"> * nb_samples if av_audio_fifo_size is less than nb_samples.</span></div>
<div class="line"><a name="l00110"></a><span class="lineno"> 110</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00111"></a><span class="lineno"> 111</span> <span class="keywordtype">int</span> <a class="code" href="group__lavu__audiofifo.html#ga0a5cdd4193a4bce3c9b3df7a8fd12ed6">av_audio_fifo_peek</a>(<a class="code" href="group__lavu__audiofifo.html#ga328abb21e9abb2c455d2d9c212d5230f">AVAudioFifo</a> *af, <span class="keywordtype">void</span> **data, <span class="keywordtype">int</span> nb_samples);</div>
<div class="line"><a name="l00112"></a><span class="lineno"> 112</span> <span class="comment"></span></div>
<div class="line"><a name="l00113"></a><span class="lineno"> 113</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00114"></a><span class="lineno"> 114</span> <span class="comment"> * Read data from an AVAudioFifo.</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"> * @see enum AVSampleFormat</span></div>
<div class="line"><a name="l00117"></a><span class="lineno"> 117</span> <span class="comment"> * The documentation for AVSampleFormat describes the data layout.</span></div>
<div class="line"><a name="l00118"></a><span class="lineno"> 118</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00119"></a><span class="lineno"> 119</span> <span class="comment"> * @param af AVAudioFifo to read from</span></div>
<div class="line"><a name="l00120"></a><span class="lineno"> 120</span> <span class="comment"> * @param data audio data plane pointers</span></div>
<div class="line"><a name="l00121"></a><span class="lineno"> 121</span> <span class="comment"> * @param nb_samples number of samples to read</span></div>
<div class="line"><a name="l00122"></a><span class="lineno"> 122</span> <span class="comment"> * @return number of samples actually read, or negative AVERROR code</span></div>
<div class="line"><a name="l00123"></a><span class="lineno"> 123</span> <span class="comment"> * on failure. The number of samples actually read will not</span></div>
<div class="line"><a name="l00124"></a><span class="lineno"> 124</span> <span class="comment"> * be greater than nb_samples, and will only be less than</span></div>
<div class="line"><a name="l00125"></a><span class="lineno"> 125</span> <span class="comment"> * nb_samples if av_audio_fifo_size is less than nb_samples.</span></div>
<div class="line"><a name="l00126"></a><span class="lineno"> 126</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00127"></a><span class="lineno"> 127</span> <span class="keywordtype">int</span> <a class="code" href="group__lavu__audiofifo.html#gab256fc29188d91311bd2fbd78eb356af">av_audio_fifo_read</a>(<a class="code" href="group__lavu__audiofifo.html#ga328abb21e9abb2c455d2d9c212d5230f">AVAudioFifo</a> *af, <span class="keywordtype">void</span> **data, <span class="keywordtype">int</span> nb_samples);</div>
<div class="line"><a name="l00128"></a><span class="lineno"> 128</span> <span class="comment"></span></div>
<div class="line"><a name="l00129"></a><span class="lineno"> 129</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00130"></a><span class="lineno"> 130</span> <span class="comment"> * Drain data from an AVAudioFifo.</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"> * Removes the data without reading it.</span></div>
<div class="line"><a name="l00133"></a><span class="lineno"> 133</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00134"></a><span class="lineno"> 134</span> <span class="comment"> * @param af AVAudioFifo to drain</span></div>
<div class="line"><a name="l00135"></a><span class="lineno"> 135</span> <span class="comment"> * @param nb_samples number of samples to drain</span></div>
<div class="line"><a name="l00136"></a><span class="lineno"> 136</span> <span class="comment"> * @return 0 if OK, or negative AVERROR code on failure</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="keywordtype">int</span> <a class="code" href="group__lavu__audiofifo.html#gacac9b187b9c27c5a0374f6f83224a77b">av_audio_fifo_drain</a>(<a class="code" href="group__lavu__audiofifo.html#ga328abb21e9abb2c455d2d9c212d5230f">AVAudioFifo</a> *af, <span class="keywordtype">int</span> nb_samples);</div>
<div class="line"><a name="l00139"></a><span class="lineno"> 139</span> <span class="comment"></span></div>
<div class="line"><a name="l00140"></a><span class="lineno"> 140</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00141"></a><span class="lineno"> 141</span> <span class="comment"> * Reset the AVAudioFifo buffer.</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"> * This empties all data in the buffer.</span></div>
<div class="line"><a name="l00144"></a><span class="lineno"> 144</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00145"></a><span class="lineno"> 145</span> <span class="comment"> * @param af AVAudioFifo to reset</span></div>
<div class="line"><a name="l00146"></a><span class="lineno"> 146</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00147"></a><span class="lineno"> 147</span> <span class="keywordtype">void</span> <a class="code" href="group__lavu__audiofifo.html#ga3f070386d11d425302437a3b60fc5dd0">av_audio_fifo_reset</a>(<a class="code" href="group__lavu__audiofifo.html#ga328abb21e9abb2c455d2d9c212d5230f">AVAudioFifo</a> *af);</div>
<div class="line"><a name="l00148"></a><span class="lineno"> 148</span> <span class="comment"></span></div>
<div class="line"><a name="l00149"></a><span class="lineno"> 149</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00150"></a><span class="lineno"> 150</span> <span class="comment"> * Get the current number of samples in the AVAudioFifo available for reading.</span></div>
<div class="line"><a name="l00151"></a><span class="lineno"> 151</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00152"></a><span class="lineno"> 152</span> <span class="comment"> * @param af the AVAudioFifo to query</span></div>
<div class="line"><a name="l00153"></a><span class="lineno"> 153</span> <span class="comment"> * @return number of samples available for reading</span></div>
<div class="line"><a name="l00154"></a><span class="lineno"> 154</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00155"></a><span class="lineno"> 155</span> <span class="keywordtype">int</span> <a class="code" href="group__lavu__audiofifo.html#gaa0a4742ecac52a999e8b4478d27f3b9b">av_audio_fifo_size</a>(<a class="code" href="group__lavu__audiofifo.html#ga328abb21e9abb2c455d2d9c212d5230f">AVAudioFifo</a> *af);</div>
<div class="line"><a name="l00156"></a><span class="lineno"> 156</span> <span class="comment"></span></div>
<div class="line"><a name="l00157"></a><span class="lineno"> 157</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00158"></a><span class="lineno"> 158</span> <span class="comment"> * Get the current number of samples in the AVAudioFifo available for writing.</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"> * @param af the AVAudioFifo to query</span></div>
<div class="line"><a name="l00161"></a><span class="lineno"> 161</span> <span class="comment"> * @return number of samples available for writing</span></div>
<div class="line"><a name="l00162"></a><span class="lineno"> 162</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00163"></a><span class="lineno"> 163</span> <span class="keywordtype">int</span> <a class="code" href="group__lavu__audiofifo.html#ga2bed2f01fe34228ee8a73617b3177d00">av_audio_fifo_space</a>(<a class="code" href="group__lavu__audiofifo.html#ga328abb21e9abb2c455d2d9c212d5230f">AVAudioFifo</a> *af);</div>
<div class="line"><a name="l00164"></a><span class="lineno"> 164</span> <span class="comment"></span></div>
<div class="line"><a name="l00165"></a><span class="lineno"> 165</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00166"></a><span class="lineno"> 166</span> <span class="comment"> * @}</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"> */</span></div>
<div class="line"><a name="l00169"></a><span class="lineno"> 169</span> </div>
<div class="line"><a name="l00170"></a><span class="lineno"> 170</span> <span class="preprocessor">#endif </span><span class="comment">/* AVUTIL_AUDIO_FIFO_H */</span><span class="preprocessor"></span></div>
<div class="ttc" id="group__lavu__audiofifo_html_ga9d792394f0615a329aec47847f8f8784"><div class="ttname"><a href="group__lavu__audiofifo.html#ga9d792394f0615a329aec47847f8f8784">av_audio_fifo_alloc</a></div><div class="ttdeci">AVAudioFifo * av_audio_fifo_alloc(enum AVSampleFormat sample_fmt, int channels, int nb_samples)</div><div class="ttdoc">Allocate an AVAudioFifo. </div></div>
<div class="ttc" id="group__lavu__audiofifo_html_gab256fc29188d91311bd2fbd78eb356af"><div class="ttname"><a href="group__lavu__audiofifo.html#gab256fc29188d91311bd2fbd78eb356af">av_audio_fifo_read</a></div><div class="ttdeci">int av_audio_fifo_read(AVAudioFifo *af, void **data, int nb_samples)</div><div class="ttdoc">Read data from an AVAudioFifo. </div></div>
<div class="ttc" id="group__lavu__audiofifo_html_ga74e029e47f7aa99217ad1f315c434875"><div class="ttname"><a href="group__lavu__audiofifo.html#ga74e029e47f7aa99217ad1f315c434875">av_audio_fifo_free</a></div><div class="ttdeci">void av_audio_fifo_free(AVAudioFifo *af)</div><div class="ttdoc">Free an AVAudioFifo. </div></div>
<div class="ttc" id="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="samplefmt_8h_html"><div class="ttname"><a href="samplefmt_8h.html">samplefmt.h</a></div></div>
<div class="ttc" id="group__lavu__audiofifo_html_ga2bed2f01fe34228ee8a73617b3177d00"><div class="ttname"><a href="group__lavu__audiofifo.html#ga2bed2f01fe34228ee8a73617b3177d00">av_audio_fifo_space</a></div><div class="ttdeci">int av_audio_fifo_space(AVAudioFifo *af)</div><div class="ttdoc">Get the current number of samples in the AVAudioFifo available for writing. </div></div>
<div class="ttc" id="group__lavu__audiofifo_html_ga328abb21e9abb2c455d2d9c212d5230f"><div class="ttname"><a href="group__lavu__audiofifo.html#ga328abb21e9abb2c455d2d9c212d5230f">AVAudioFifo</a></div><div class="ttdeci">struct AVAudioFifo AVAudioFifo</div><div class="ttdoc">Context for an Audio FIFO Buffer. </div><div class="ttdef"><b>Definition:</b> <a href="audio__fifo_8h_source.html#l00049">audio_fifo.h:49</a></div></div>
<div class="ttc" id="group__lavu__audiofifo_html_gaa0a4742ecac52a999e8b4478d27f3b9b"><div class="ttname"><a href="group__lavu__audiofifo.html#gaa0a4742ecac52a999e8b4478d27f3b9b">av_audio_fifo_size</a></div><div class="ttdeci">int av_audio_fifo_size(AVAudioFifo *af)</div><div class="ttdoc">Get the current number of samples in the AVAudioFifo available for reading. </div></div>
<div class="ttc" id="group__lavu__audiofifo_html_ga27c1e16e5f09940d6016b1971c0b5742"><div class="ttname"><a href="group__lavu__audiofifo.html#ga27c1e16e5f09940d6016b1971c0b5742">av_audio_fifo_realloc</a></div><div class="ttdeci">av_warn_unused_result int av_audio_fifo_realloc(AVAudioFifo *af, int nb_samples)</div><div class="ttdoc">Reallocate an AVAudioFifo. </div></div>
<div class="ttc" id="group__lavu__sampfmts_html_gaf9a51ca15301871723577c730b5865c5"><div class="ttname"><a href="group__lavu__sampfmts.html#gaf9a51ca15301871723577c730b5865c5">AVSampleFormat</a></div><div class="ttdeci">AVSampleFormat</div><div class="ttdoc">Audio sample formats. </div><div class="ttdef"><b>Definition:</b> <a href="samplefmt_8h_source.html#l00059">samplefmt.h:59</a></div></div>
<div class="ttc" id="fifo_8h_html"><div class="ttname"><a href="fifo_8h.html">fifo.h</a></div><div class="ttdoc">a very simple circular buffer FIFO implementation </div></div>
<div class="ttc" id="group__lavu__audiofifo_html_ga0e7fadeea09c52a96eb4082a9e169bb4"><div class="ttname"><a href="group__lavu__audiofifo.html#ga0e7fadeea09c52a96eb4082a9e169bb4">av_audio_fifo_write</a></div><div class="ttdeci">int av_audio_fifo_write(AVAudioFifo *af, void **data, int nb_samples)</div><div class="ttdoc">Write data to an AVAudioFifo. </div></div>
<div class="ttc" id="attributes_8h_html_a93f17e0f0b53a66e7b5eceb3dff2918f"><div class="ttname"><a href="attributes_8h.html#a93f17e0f0b53a66e7b5eceb3dff2918f">av_warn_unused_result</a></div><div class="ttdeci">#define av_warn_unused_result</div><div class="ttdef"><b>Definition:</b> <a href="attributes_8h_source.html#l00056">attributes.h:56</a></div></div>
<div class="ttc" id="group__lavu__audiofifo_html_gacac9b187b9c27c5a0374f6f83224a77b"><div class="ttname"><a href="group__lavu__audiofifo.html#gacac9b187b9c27c5a0374f6f83224a77b">av_audio_fifo_drain</a></div><div class="ttdeci">int av_audio_fifo_drain(AVAudioFifo *af, int nb_samples)</div><div class="ttdoc">Drain data from an AVAudioFifo. </div></div>
<div class="ttc" id="group__lavu__audiofifo_html_ga0a5cdd4193a4bce3c9b3df7a8fd12ed6"><div class="ttname"><a href="group__lavu__audiofifo.html#ga0a5cdd4193a4bce3c9b3df7a8fd12ed6">av_audio_fifo_peek</a></div><div class="ttdeci">int av_audio_fifo_peek(AVAudioFifo *af, void **data, int nb_samples)</div><div class="ttdoc">Peek data from an AVAudioFifo. </div></div>
<div class="ttc" id="group__lavu__audiofifo_html_ga3f070386d11d425302437a3b60fc5dd0"><div class="ttname"><a href="group__lavu__audiofifo.html#ga3f070386d11d425302437a3b60fc5dd0">av_audio_fifo_reset</a></div><div class="ttdeci">void av_audio_fifo_reset(AVAudioFifo *af)</div><div class="ttdoc">Reset the AVAudioFifo buffer. </div></div>
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