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<li class="navelem"><a class="el" href="dir_8d855866ba5d436d839c7fc557836cd9.html">libavutil</a></li> </ul>
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<a href="buffer_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"> * This file is part of FFmpeg.</span></div>
<div class="line"><a name="l00003"></a><span class="lineno"> 3</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00004"></a><span class="lineno"> 4</span> <span class="comment"> * FFmpeg is free software; you can redistribute it and/or</span></div>
<div class="line"><a name="l00005"></a><span class="lineno"> 5</span> <span class="comment"> * modify it under the terms of the GNU Lesser General Public</span></div>
<div class="line"><a name="l00006"></a><span class="lineno"> 6</span> <span class="comment"> * License as published by the Free Software Foundation; either</span></div>
<div class="line"><a name="l00007"></a><span class="lineno"> 7</span> <span class="comment"> * version 2.1 of the License, or (at your option) any later version.</span></div>
<div class="line"><a name="l00008"></a><span class="lineno"> 8</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00009"></a><span class="lineno"> 9</span> <span class="comment"> * FFmpeg is distributed in the hope that it will be useful,</span></div>
<div class="line"><a name="l00010"></a><span class="lineno"> 10</span> <span class="comment"> * but WITHOUT ANY WARRANTY; without even the implied warranty of</span></div>
<div class="line"><a name="l00011"></a><span class="lineno"> 11</span> <span class="comment"> * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU</span></div>
<div class="line"><a name="l00012"></a><span class="lineno"> 12</span> <span class="comment"> * Lesser General Public License for more details.</span></div>
<div class="line"><a name="l00013"></a><span class="lineno"> 13</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00014"></a><span class="lineno"> 14</span> <span class="comment"> * You should have received a copy of the GNU Lesser General Public</span></div>
<div class="line"><a name="l00015"></a><span class="lineno"> 15</span> <span class="comment"> * License along with FFmpeg; if not, write to the Free Software</span></div>
<div class="line"><a name="l00016"></a><span class="lineno"> 16</span> <span class="comment"> * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA</span></div>
<div class="line"><a name="l00017"></a><span class="lineno"> 17</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00018"></a><span class="lineno"> 18</span> <span class="comment"></span></div>
<div class="line"><a name="l00019"></a><span class="lineno"> 19</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00020"></a><span class="lineno"> 20</span> <span class="comment"> * @file</span></div>
<div class="line"><a name="l00021"></a><span class="lineno"> 21</span> <span class="comment"> * @ingroup lavu_buffer</span></div>
<div class="line"><a name="l00022"></a><span class="lineno"> 22</span> <span class="comment"> * refcounted data buffer API</span></div>
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00024"></a><span class="lineno"> 24</span> </div>
<div class="line"><a name="l00025"></a><span class="lineno"> 25</span> <span class="preprocessor">#ifndef AVUTIL_BUFFER_H</span></div>
<div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="preprocessor"></span><span class="preprocessor">#define AVUTIL_BUFFER_H</span></div>
<div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="preprocessor">#include <stdint.h></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 lavu_buffer AVBuffer</span></div>
<div class="line"><a name="l00032"></a><span class="lineno"> 32</span> <span class="comment"> * @ingroup lavu_data</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"> * AVBuffer is an API for reference-counted data buffers.</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"> * There are two core objects in this API -- AVBuffer and AVBufferRef. AVBuffer</span></div>
<div class="line"><a name="l00038"></a><span class="lineno"> 38</span> <span class="comment"> * represents the data buffer itself; it is opaque and not meant to be accessed</span></div>
<div class="line"><a name="l00039"></a><span class="lineno"> 39</span> <span class="comment"> * by the caller directly, but only through AVBufferRef. However, the caller may</span></div>
<div class="line"><a name="l00040"></a><span class="lineno"> 40</span> <span class="comment"> * e.g. compare two AVBuffer pointers to check whether two different references</span></div>
<div class="line"><a name="l00041"></a><span class="lineno"> 41</span> <span class="comment"> * are describing the same data buffer. AVBufferRef represents a single</span></div>
<div class="line"><a name="l00042"></a><span class="lineno"> 42</span> <span class="comment"> * reference to an AVBuffer and it is the object that may be manipulated by the</span></div>
<div class="line"><a name="l00043"></a><span class="lineno"> 43</span> <span class="comment"> * caller directly.</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"> * There are two functions provided for creating a new AVBuffer with a single</span></div>
<div class="line"><a name="l00046"></a><span class="lineno"> 46</span> <span class="comment"> * reference -- av_buffer_alloc() to just allocate a new buffer, and</span></div>
<div class="line"><a name="l00047"></a><span class="lineno"> 47</span> <span class="comment"> * av_buffer_create() to wrap an existing array in an AVBuffer. From an existing</span></div>
<div class="line"><a name="l00048"></a><span class="lineno"> 48</span> <span class="comment"> * reference, additional references may be created with av_buffer_ref().</span></div>
<div class="line"><a name="l00049"></a><span class="lineno"> 49</span> <span class="comment"> * Use av_buffer_unref() to free a reference (this will automatically free the</span></div>
<div class="line"><a name="l00050"></a><span class="lineno"> 50</span> <span class="comment"> * data once all the references are freed).</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"> * The convention throughout this API and the rest of FFmpeg is such that the</span></div>
<div class="line"><a name="l00053"></a><span class="lineno"> 53</span> <span class="comment"> * buffer is considered writable if there exists only one reference to it (and</span></div>
<div class="line"><a name="l00054"></a><span class="lineno"> 54</span> <span class="comment"> * it has not been marked as read-only). The av_buffer_is_writable() function is</span></div>
<div class="line"><a name="l00055"></a><span class="lineno"> 55</span> <span class="comment"> * provided to check whether this is true and av_buffer_make_writable() will</span></div>
<div class="line"><a name="l00056"></a><span class="lineno"> 56</span> <span class="comment"> * automatically create a new writable buffer when necessary.</span></div>
<div class="line"><a name="l00057"></a><span class="lineno"> 57</span> <span class="comment"> * Of course nothing prevents the calling code from violating this convention,</span></div>
<div class="line"><a name="l00058"></a><span class="lineno"> 58</span> <span class="comment"> * however that is safe only when all the existing references are under its</span></div>
<div class="line"><a name="l00059"></a><span class="lineno"> 59</span> <span class="comment"> * control.</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"> * @note Referencing and unreferencing the buffers is thread-safe and thus</span></div>
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span> <span class="comment"> * may be done from multiple threads simultaneously without any need for</span></div>
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span> <span class="comment"> * additional locking.</span></div>
<div class="line"><a name="l00064"></a><span class="lineno"> 64</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00065"></a><span class="lineno"> 65</span> <span class="comment"> * @note Two different references to the same buffer can point to different</span></div>
<div class="line"><a name="l00066"></a><span class="lineno"> 66</span> <span class="comment"> * parts of the buffer (i.e. their AVBufferRef.data will not be equal).</span></div>
<div class="line"><a name="l00067"></a><span class="lineno"> 67</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span> <span class="comment"></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"> * A reference counted buffer type. It is opaque and is meant to be used through</span></div>
<div class="line"><a name="l00071"></a><span class="lineno"> 71</span> <span class="comment"> * references (AVBufferRef).</span></div>
<div class="line"><a name="l00072"></a><span class="lineno"> 72</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00073"></a><span class="lineno"><a class="line" href="group__lavu__buffer.html#ga501d49df442180d584f255aa97b2549d"> 73</a></span> <span class="keyword">typedef</span> <span class="keyword">struct </span><a class="code" href="group__lavu__buffer.html#ga501d49df442180d584f255aa97b2549d">AVBuffer</a> <a class="code" href="group__lavu__buffer.html#ga501d49df442180d584f255aa97b2549d">AVBuffer</a>;</div>
<div class="line"><a name="l00074"></a><span class="lineno"> 74</span> <span class="comment"></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"> * A reference to a data buffer.</span></div>
<div class="line"><a name="l00077"></a><span class="lineno"> 77</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00078"></a><span class="lineno"> 78</span> <span class="comment"> * The size of this struct is not a part of the public ABI and it is not meant</span></div>
<div class="line"><a name="l00079"></a><span class="lineno"> 79</span> <span class="comment"> * to be allocated directly.</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"><a class="line" href="structAVBufferRef.html"> 81</a></span> <span class="keyword">typedef</span> <span class="keyword">struct </span><a class="code" href="structAVBufferRef.html">AVBufferRef</a> {</div>
<div class="line"><a name="l00082"></a><span class="lineno"><a class="line" href="structAVBufferRef.html#a3c692274c56720d7903bbd35bcaec3a2"> 82</a></span>  <a class="code" href="group__lavu__buffer.html#ga501d49df442180d584f255aa97b2549d">AVBuffer</a> *<a class="code" href="structAVBufferRef.html#a3c692274c56720d7903bbd35bcaec3a2">buffer</a>;</div>
<div class="line"><a name="l00083"></a><span class="lineno"> 83</span> <span class="comment"></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"> * The data buffer. It is considered writable if and only if</span></div>
<div class="line"><a name="l00086"></a><span class="lineno"> 86</span> <span class="comment"> * this is the only reference to the buffer, in which case</span></div>
<div class="line"><a name="l00087"></a><span class="lineno"> 87</span> <span class="comment"> * av_buffer_is_writable() returns 1.</span></div>
<div class="line"><a name="l00088"></a><span class="lineno"> 88</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00089"></a><span class="lineno"><a class="line" href="structAVBufferRef.html#acb8452e99cd75074b93800b532c6ea4b"> 89</a></span>  uint8_t *<a class="code" href="structAVBufferRef.html#acb8452e99cd75074b93800b532c6ea4b">data</a>;<span class="comment"></span></div>
<div class="line"><a name="l00090"></a><span class="lineno"> 90</span> <span class="comment"> /**</span></div>
<div class="line"><a name="l00091"></a><span class="lineno"> 91</span> <span class="comment"> * Size of data in bytes.</span></div>
<div class="line"><a name="l00092"></a><span class="lineno"> 92</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00093"></a><span class="lineno"><a class="line" href="structAVBufferRef.html#a55f17b82a5af97259a5e8a3fd9647a08"> 93</a></span>  <span class="keywordtype">int</span> <a class="code" href="structAVBufferRef.html#a55f17b82a5af97259a5e8a3fd9647a08">size</a>;</div>
<div class="line"><a name="l00094"></a><span class="lineno"> 94</span> } <a class="code" href="structAVBufferRef.html">AVBufferRef</a>;</div>
<div class="line"><a name="l00095"></a><span class="lineno"> 95</span> <span class="comment"></span></div>
<div class="line"><a name="l00096"></a><span class="lineno"> 96</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00097"></a><span class="lineno"> 97</span> <span class="comment"> * Allocate an AVBuffer of the given size using av_malloc().</span></div>
<div class="line"><a name="l00098"></a><span class="lineno"> 98</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00099"></a><span class="lineno"> 99</span> <span class="comment"> * @return an AVBufferRef of given size or NULL when out of memory</span></div>
<div class="line"><a name="l00100"></a><span class="lineno"> 100</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00101"></a><span class="lineno"> 101</span> <a class="code" href="structAVBufferRef.html">AVBufferRef</a> *<a class="code" href="group__lavu__buffer.html#ga5ae84ac902283dea1a660ede06c1cdac">av_buffer_alloc</a>(<span class="keywordtype">int</span> size);</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">/**</span></div>
<div class="line"><a name="l00104"></a><span class="lineno"> 104</span> <span class="comment"> * Same as av_buffer_alloc(), except the returned buffer will be initialized</span></div>
<div class="line"><a name="l00105"></a><span class="lineno"> 105</span> <span class="comment"> * to zero.</span></div>
<div class="line"><a name="l00106"></a><span class="lineno"> 106</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00107"></a><span class="lineno"> 107</span> <a class="code" href="structAVBufferRef.html">AVBufferRef</a> *<a class="code" href="group__lavu__buffer.html#ga27f37cc004f768b00442b6cb08091686">av_buffer_allocz</a>(<span class="keywordtype">int</span> size);</div>
<div class="line"><a name="l00108"></a><span class="lineno"> 108</span> <span class="comment"></span></div>
<div class="line"><a name="l00109"></a><span class="lineno"> 109</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00110"></a><span class="lineno"> 110</span> <span class="comment"> * Always treat the buffer as read-only, even when it has only one</span></div>
<div class="line"><a name="l00111"></a><span class="lineno"> 111</span> <span class="comment"> * reference.</span></div>
<div class="line"><a name="l00112"></a><span class="lineno"> 112</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00113"></a><span class="lineno"><a class="line" href="group__lavu__buffer.html#gaa818f8f1011d69acc50c1f29cb85e576"> 113</a></span> <span class="preprocessor">#define AV_BUFFER_FLAG_READONLY (1 << 0)</span></div>
<div class="line"><a name="l00114"></a><span class="lineno"> 114</span> <span class="preprocessor"></span><span class="comment"></span></div>
<div class="line"><a name="l00115"></a><span class="lineno"> 115</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00116"></a><span class="lineno"> 116</span> <span class="comment"> * Create an AVBuffer from an existing array.</span></div>
<div class="line"><a name="l00117"></a><span class="lineno"> 117</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00118"></a><span class="lineno"> 118</span> <span class="comment"> * If this function is successful, data is owned by the AVBuffer. The caller may</span></div>
<div class="line"><a name="l00119"></a><span class="lineno"> 119</span> <span class="comment"> * only access data through the returned AVBufferRef and references derived from</span></div>
<div class="line"><a name="l00120"></a><span class="lineno"> 120</span> <span class="comment"> * it.</span></div>
<div class="line"><a name="l00121"></a><span class="lineno"> 121</span> <span class="comment"> * If this function fails, data is left untouched.</span></div>
<div class="line"><a name="l00122"></a><span class="lineno"> 122</span> <span class="comment"> * @param data data array</span></div>
<div class="line"><a name="l00123"></a><span class="lineno"> 123</span> <span class="comment"> * @param size size of data in bytes</span></div>
<div class="line"><a name="l00124"></a><span class="lineno"> 124</span> <span class="comment"> * @param free a callback for freeing this buffer's data</span></div>
<div class="line"><a name="l00125"></a><span class="lineno"> 125</span> <span class="comment"> * @param opaque parameter to be got for processing or passed to free</span></div>
<div class="line"><a name="l00126"></a><span class="lineno"> 126</span> <span class="comment"> * @param flags a combination of AV_BUFFER_FLAG_*</span></div>
<div class="line"><a name="l00127"></a><span class="lineno"> 127</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00128"></a><span class="lineno"> 128</span> <span class="comment"> * @return an AVBufferRef referring to data on success, NULL on failure.</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> <a class="code" href="structAVBufferRef.html">AVBufferRef</a> *<a class="code" href="group__lavu__buffer.html#ga3e7f4c92db85ccba0b2a16dd0069842a">av_buffer_create</a>(uint8_t *data, <span class="keywordtype">int</span> size,</div>
<div class="line"><a name="l00131"></a><span class="lineno"> 131</span>  <span class="keywordtype">void</span> (*free)(<span class="keywordtype">void</span> *opaque, uint8_t *data),</div>
<div class="line"><a name="l00132"></a><span class="lineno"> 132</span>  <span class="keywordtype">void</span> *opaque, <span class="keywordtype">int</span> flags);</div>
<div class="line"><a name="l00133"></a><span class="lineno"> 133</span> <span class="comment"></span></div>
<div class="line"><a name="l00134"></a><span class="lineno"> 134</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00135"></a><span class="lineno"> 135</span> <span class="comment"> * Default free callback, which calls av_free() on the buffer data.</span></div>
<div class="line"><a name="l00136"></a><span class="lineno"> 136</span> <span class="comment"> * This function is meant to be passed to av_buffer_create(), not called</span></div>
<div class="line"><a name="l00137"></a><span class="lineno"> 137</span> <span class="comment"> * directly.</span></div>
<div class="line"><a name="l00138"></a><span class="lineno"> 138</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00139"></a><span class="lineno"> 139</span> <span class="keywordtype">void</span> <a class="code" href="group__lavu__buffer.html#ga37d620e8cfc9f2f3261c2b4c5d4adfe0">av_buffer_default_free</a>(<span class="keywordtype">void</span> *opaque, uint8_t *data);</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">/**</span></div>
<div class="line"><a name="l00142"></a><span class="lineno"> 142</span> <span class="comment"> * Create a new reference to an AVBuffer.</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 a new AVBufferRef referring to the same AVBuffer as buf or NULL on</span></div>
<div class="line"><a name="l00145"></a><span class="lineno"> 145</span> <span class="comment"> * failure.</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> <a class="code" href="structAVBufferRef.html">AVBufferRef</a> *<a class="code" href="group__lavu__buffer.html#gaa40ce7d3ede946a89d03323bbd7268c1">av_buffer_ref</a>(<a class="code" href="structAVBufferRef.html">AVBufferRef</a> *buf);</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"> * Free a given reference and automatically free the buffer if there are no more</span></div>
<div class="line"><a name="l00151"></a><span class="lineno"> 151</span> <span class="comment"> * references to it.</span></div>
<div class="line"><a name="l00152"></a><span class="lineno"> 152</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00153"></a><span class="lineno"> 153</span> <span class="comment"> * @param buf the reference to be freed. The pointer is set to NULL on return.</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">void</span> <a class="code" href="group__lavu__buffer.html#ga135e9e929b5033bb8f68322497b2effc">av_buffer_unref</a>(<a class="code" href="structAVBufferRef.html">AVBufferRef</a> **buf);</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"> * @return 1 if the caller may write to the data referred to by buf (which is</span></div>
<div class="line"><a name="l00159"></a><span class="lineno"> 159</span> <span class="comment"> * true if and only if buf is the only reference to the underlying AVBuffer).</span></div>
<div class="line"><a name="l00160"></a><span class="lineno"> 160</span> <span class="comment"> * Return 0 otherwise.</span></div>
<div class="line"><a name="l00161"></a><span class="lineno"> 161</span> <span class="comment"> * A positive answer is valid until av_buffer_ref() is called on buf.</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__buffer.html#ga060be34ace567ae378fd0a786e847053">av_buffer_is_writable</a>(<span class="keyword">const</span> <a class="code" href="structAVBufferRef.html">AVBufferRef</a> *buf);</div>
<div class="line"><a name="l00164"></a><span class="lineno"> 164</span> <span class="comment"></span></div>
<div class="line"><a name="l00165"></a><span class="lineno"> 165</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00166"></a><span class="lineno"> 166</span> <span class="comment"> * @return the opaque parameter set by av_buffer_create.</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="keywordtype">void</span> *<a class="code" href="group__lavu__buffer.html#gac1c38f469fc9933885cfffafd8cbf0d6">av_buffer_get_opaque</a>(<span class="keyword">const</span> <a class="code" href="structAVBufferRef.html">AVBufferRef</a> *buf);</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="keywordtype">int</span> <a class="code" href="group__lavu__buffer.html#ga7b16c3976dc555f71d0843bbd023dfcd">av_buffer_get_ref_count</a>(<span class="keyword">const</span> <a class="code" href="structAVBufferRef.html">AVBufferRef</a> *buf);</div>
<div class="line"><a name="l00171"></a><span class="lineno"> 171</span> <span class="comment"></span></div>
<div class="line"><a name="l00172"></a><span class="lineno"> 172</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00173"></a><span class="lineno"> 173</span> <span class="comment"> * Create a writable reference from a given buffer reference, avoiding data copy</span></div>
<div class="line"><a name="l00174"></a><span class="lineno"> 174</span> <span class="comment"> * if possible.</span></div>
<div class="line"><a name="l00175"></a><span class="lineno"> 175</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00176"></a><span class="lineno"> 176</span> <span class="comment"> * @param buf buffer reference to make writable. On success, buf is either left</span></div>
<div class="line"><a name="l00177"></a><span class="lineno"> 177</span> <span class="comment"> * untouched, or it is unreferenced and a new writable AVBufferRef is</span></div>
<div class="line"><a name="l00178"></a><span class="lineno"> 178</span> <span class="comment"> * written in its place. On failure, buf is left untouched.</span></div>
<div class="line"><a name="l00179"></a><span class="lineno"> 179</span> <span class="comment"> * @return 0 on success, a negative AVERROR 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__lavu__buffer.html#ga9c2a1be1b7bb80eec8613fdb62a19074">av_buffer_make_writable</a>(<a class="code" href="structAVBufferRef.html">AVBufferRef</a> **buf);</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"> * Reallocate a given buffer.</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 buf a buffer reference to reallocate. On success, buf will be</span></div>
<div class="line"><a name="l00187"></a><span class="lineno"> 187</span> <span class="comment"> * unreferenced and a new reference with the required size will be</span></div>
<div class="line"><a name="l00188"></a><span class="lineno"> 188</span> <span class="comment"> * written in its place. On failure buf will be left untouched. *buf</span></div>
<div class="line"><a name="l00189"></a><span class="lineno"> 189</span> <span class="comment"> * may be NULL, then a new buffer is allocated.</span></div>
<div class="line"><a name="l00190"></a><span class="lineno"> 190</span> <span class="comment"> * @param size required new buffer size.</span></div>
<div class="line"><a name="l00191"></a><span class="lineno"> 191</span> <span class="comment"> * @return 0 on success, a negative AVERROR on failure.</span></div>
<div class="line"><a name="l00192"></a><span class="lineno"> 192</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00193"></a><span class="lineno"> 193</span> <span class="comment"> * @note the buffer is actually reallocated with av_realloc() only if it was</span></div>
<div class="line"><a name="l00194"></a><span class="lineno"> 194</span> <span class="comment"> * initially allocated through av_buffer_realloc(NULL) and there is only one</span></div>
<div class="line"><a name="l00195"></a><span class="lineno"> 195</span> <span class="comment"> * reference to it (i.e. the one passed to this function). In all other cases</span></div>
<div class="line"><a name="l00196"></a><span class="lineno"> 196</span> <span class="comment"> * a new buffer is allocated and the data is copied.</span></div>
<div class="line"><a name="l00197"></a><span class="lineno"> 197</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00198"></a><span class="lineno"> 198</span> <span class="keywordtype">int</span> <a class="code" href="group__lavu__buffer.html#gac7c228f9ed54e246dcd270503bed7291">av_buffer_realloc</a>(<a class="code" href="structAVBufferRef.html">AVBufferRef</a> **buf, <span class="keywordtype">int</span> size);</div>
<div class="line"><a name="l00199"></a><span class="lineno"> 199</span> <span class="comment"></span></div>
<div class="line"><a name="l00200"></a><span class="lineno"> 200</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00201"></a><span class="lineno"> 201</span> <span class="comment"> * @}</span></div>
<div class="line"><a name="l00202"></a><span class="lineno"> 202</span> <span class="comment"> */</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="comment">/**</span></div>
<div class="line"><a name="l00205"></a><span class="lineno"> 205</span> <span class="comment"> * @defgroup lavu_bufferpool AVBufferPool</span></div>
<div class="line"><a name="l00206"></a><span class="lineno"> 206</span> <span class="comment"> * @ingroup lavu_data</span></div>
<div class="line"><a name="l00207"></a><span class="lineno"> 207</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00208"></a><span class="lineno"> 208</span> <span class="comment"> * @{</span></div>
<div class="line"><a name="l00209"></a><span class="lineno"> 209</span> <span class="comment"> * AVBufferPool is an API for a lock-free thread-safe pool of AVBuffers.</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"> * Frequently allocating and freeing large buffers may be slow. AVBufferPool is</span></div>
<div class="line"><a name="l00212"></a><span class="lineno"> 212</span> <span class="comment"> * meant to solve this in cases when the caller needs a set of buffers of the</span></div>
<div class="line"><a name="l00213"></a><span class="lineno"> 213</span> <span class="comment"> * same size (the most obvious use case being buffers for raw video or audio</span></div>
<div class="line"><a name="l00214"></a><span class="lineno"> 214</span> <span class="comment"> * frames).</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"> * At the beginning, the user must call av_buffer_pool_init() to create the</span></div>
<div class="line"><a name="l00217"></a><span class="lineno"> 217</span> <span class="comment"> * buffer pool. Then whenever a buffer is needed, call av_buffer_pool_get() to</span></div>
<div class="line"><a name="l00218"></a><span class="lineno"> 218</span> <span class="comment"> * get a reference to a new buffer, similar to av_buffer_alloc(). This new</span></div>
<div class="line"><a name="l00219"></a><span class="lineno"> 219</span> <span class="comment"> * reference works in all aspects the same way as the one created by</span></div>
<div class="line"><a name="l00220"></a><span class="lineno"> 220</span> <span class="comment"> * av_buffer_alloc(). However, when the last reference to this buffer is</span></div>
<div class="line"><a name="l00221"></a><span class="lineno"> 221</span> <span class="comment"> * unreferenced, it is returned to the pool instead of being freed and will be</span></div>
<div class="line"><a name="l00222"></a><span class="lineno"> 222</span> <span class="comment"> * reused for subsequent av_buffer_pool_get() calls.</span></div>
<div class="line"><a name="l00223"></a><span class="lineno"> 223</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00224"></a><span class="lineno"> 224</span> <span class="comment"> * When the caller is done with the pool and no longer needs to allocate any new</span></div>
<div class="line"><a name="l00225"></a><span class="lineno"> 225</span> <span class="comment"> * buffers, av_buffer_pool_uninit() must be called to mark the pool as freeable.</span></div>
<div class="line"><a name="l00226"></a><span class="lineno"> 226</span> <span class="comment"> * Once all the buffers are released, it will automatically be freed.</span></div>
<div class="line"><a name="l00227"></a><span class="lineno"> 227</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00228"></a><span class="lineno"> 228</span> <span class="comment"> * Allocating and releasing buffers with this API is thread-safe as long as</span></div>
<div class="line"><a name="l00229"></a><span class="lineno"> 229</span> <span class="comment"> * either the default alloc callback is used, or the user-supplied one is</span></div>
<div class="line"><a name="l00230"></a><span class="lineno"> 230</span> <span class="comment"> * thread-safe.</span></div>
<div class="line"><a name="l00231"></a><span class="lineno"> 231</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00232"></a><span class="lineno"> 232</span> <span class="comment"></span></div>
<div class="line"><a name="l00233"></a><span class="lineno"> 233</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00234"></a><span class="lineno"> 234</span> <span class="comment"> * The buffer pool. This structure is opaque and not meant to be accessed</span></div>
<div class="line"><a name="l00235"></a><span class="lineno"> 235</span> <span class="comment"> * directly. It is allocated with av_buffer_pool_init() and freed with</span></div>
<div class="line"><a name="l00236"></a><span class="lineno"> 236</span> <span class="comment"> * av_buffer_pool_uninit().</span></div>
<div class="line"><a name="l00237"></a><span class="lineno"> 237</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00238"></a><span class="lineno"><a class="line" href="group__lavu__bufferpool.html#ga13bc8038952b61bae4d591f30c7421f6"> 238</a></span> <span class="keyword">typedef</span> <span class="keyword">struct </span><a class="code" href="group__lavu__bufferpool.html#ga13bc8038952b61bae4d591f30c7421f6">AVBufferPool</a> <a class="code" href="group__lavu__bufferpool.html#ga13bc8038952b61bae4d591f30c7421f6">AVBufferPool</a>;</div>
<div class="line"><a name="l00239"></a><span class="lineno"> 239</span> <span class="comment"></span></div>
<div class="line"><a name="l00240"></a><span class="lineno"> 240</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00241"></a><span class="lineno"> 241</span> <span class="comment"> * Allocate and initialize a buffer pool.</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"> * @param size size of each buffer in this pool</span></div>
<div class="line"><a name="l00244"></a><span class="lineno"> 244</span> <span class="comment"> * @param alloc a function that will be used to allocate new buffers when the</span></div>
<div class="line"><a name="l00245"></a><span class="lineno"> 245</span> <span class="comment"> * pool is empty. May be NULL, then the default allocator will be used</span></div>
<div class="line"><a name="l00246"></a><span class="lineno"> 246</span> <span class="comment"> * (av_buffer_alloc()).</span></div>
<div class="line"><a name="l00247"></a><span class="lineno"> 247</span> <span class="comment"> * @return newly created buffer pool on success, NULL on error.</span></div>
<div class="line"><a name="l00248"></a><span class="lineno"> 248</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00249"></a><span class="lineno"> 249</span> <a class="code" href="group__lavu__bufferpool.html#ga13bc8038952b61bae4d591f30c7421f6">AVBufferPool</a> *<a class="code" href="group__lavu__bufferpool.html#ga26af9b07c08bc7fd2cfc62767e490b93">av_buffer_pool_init</a>(<span class="keywordtype">int</span> size, <a class="code" href="structAVBufferRef.html">AVBufferRef</a>* (*alloc)(<span class="keywordtype">int</span> size));</div>
<div class="line"><a name="l00250"></a><span class="lineno"> 250</span> <span class="comment"></span></div>
<div class="line"><a name="l00251"></a><span class="lineno"> 251</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00252"></a><span class="lineno"> 252</span> <span class="comment"> * Mark the pool as being available for freeing. It will actually be freed only</span></div>
<div class="line"><a name="l00253"></a><span class="lineno"> 253</span> <span class="comment"> * once all the allocated buffers associated with the pool are released. Thus it</span></div>
<div class="line"><a name="l00254"></a><span class="lineno"> 254</span> <span class="comment"> * is safe to call this function while some of the allocated buffers are still</span></div>
<div class="line"><a name="l00255"></a><span class="lineno"> 255</span> <span class="comment"> * in use.</span></div>
<div class="line"><a name="l00256"></a><span class="lineno"> 256</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00257"></a><span class="lineno"> 257</span> <span class="comment"> * @param pool pointer to the pool to be freed. It will be set to NULL.</span></div>
<div class="line"><a name="l00258"></a><span class="lineno"> 258</span> <span class="comment"> * @see av_buffer_pool_can_uninit()</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="keywordtype">void</span> <a class="code" href="group__lavu__bufferpool.html#ga7b76781c5944b3bb59b2e3b1a8994e4a">av_buffer_pool_uninit</a>(<a class="code" href="group__lavu__bufferpool.html#ga13bc8038952b61bae4d591f30c7421f6">AVBufferPool</a> **pool);</div>
<div class="line"><a name="l00261"></a><span class="lineno"> 261</span> <span class="comment"></span></div>
<div class="line"><a name="l00262"></a><span class="lineno"> 262</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00263"></a><span class="lineno"> 263</span> <span class="comment"> * Allocate a new AVBuffer, reusing an old buffer from the pool when available.</span></div>
<div class="line"><a name="l00264"></a><span class="lineno"> 264</span> <span class="comment"> * This function may be called simultaneously from multiple threads.</span></div>
<div class="line"><a name="l00265"></a><span class="lineno"> 265</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00266"></a><span class="lineno"> 266</span> <span class="comment"> * @return a reference to the new buffer on success, NULL on error.</span></div>
<div class="line"><a name="l00267"></a><span class="lineno"> 267</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00268"></a><span class="lineno"> 268</span> <a class="code" href="structAVBufferRef.html">AVBufferRef</a> *<a class="code" href="group__lavu__bufferpool.html#ga2c745ecb4001452423e775b06b20fb7c">av_buffer_pool_get</a>(<a class="code" href="group__lavu__bufferpool.html#ga13bc8038952b61bae4d591f30c7421f6">AVBufferPool</a> *pool);</div>
<div class="line"><a name="l00269"></a><span class="lineno"> 269</span> <span class="comment"></span></div>
<div class="line"><a name="l00270"></a><span class="lineno"> 270</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00271"></a><span class="lineno"> 271</span> <span class="comment"> * @}</span></div>
<div class="line"><a name="l00272"></a><span class="lineno"> 272</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00273"></a><span class="lineno"> 273</span> </div>
<div class="line"><a name="l00274"></a><span class="lineno"> 274</span> <span class="preprocessor">#endif </span><span class="comment">/* AVUTIL_BUFFER_H */</span><span class="preprocessor"></span></div>
<div class="ttc" id="group__lavu__buffer_html_ga9c2a1be1b7bb80eec8613fdb62a19074"><div class="ttname"><a href="group__lavu__buffer.html#ga9c2a1be1b7bb80eec8613fdb62a19074">av_buffer_make_writable</a></div><div class="ttdeci">int av_buffer_make_writable(AVBufferRef **buf)</div><div class="ttdoc">Create a writable reference from a given buffer reference, avoiding data copy if possible. </div></div>
<div class="ttc" id="group__lavu__buffer_html_ga135e9e929b5033bb8f68322497b2effc"><div class="ttname"><a href="group__lavu__buffer.html#ga135e9e929b5033bb8f68322497b2effc">av_buffer_unref</a></div><div class="ttdeci">void av_buffer_unref(AVBufferRef **buf)</div><div class="ttdoc">Free a given reference and automatically free the buffer if there are no more references to it...</div></div>
<div class="ttc" id="group__lavu__buffer_html_ga501d49df442180d584f255aa97b2549d"><div class="ttname"><a href="group__lavu__buffer.html#ga501d49df442180d584f255aa97b2549d">AVBuffer</a></div><div class="ttdeci">struct AVBuffer AVBuffer</div><div class="ttdoc">A reference counted buffer type. </div><div class="ttdef"><b>Definition:</b> <a href="buffer_8h_source.html#l00073">buffer.h:73</a></div></div>
<div class="ttc" id="group__lavu__buffer_html_ga37d620e8cfc9f2f3261c2b4c5d4adfe0"><div class="ttname"><a href="group__lavu__buffer.html#ga37d620e8cfc9f2f3261c2b4c5d4adfe0">av_buffer_default_free</a></div><div class="ttdeci">void av_buffer_default_free(void *opaque, uint8_t *data)</div><div class="ttdoc">Default free callback, which calls av_free() on the buffer data. </div></div>
<div class="ttc" id="group__lavu__bufferpool_html_ga13bc8038952b61bae4d591f30c7421f6"><div class="ttname"><a href="group__lavu__bufferpool.html#ga13bc8038952b61bae4d591f30c7421f6">AVBufferPool</a></div><div class="ttdeci">struct AVBufferPool AVBufferPool</div><div class="ttdoc">The buffer pool. </div><div class="ttdef"><b>Definition:</b> <a href="buffer_8h_source.html#l00238">buffer.h:238</a></div></div>
<div class="ttc" id="group__lavu__buffer_html_ga3e7f4c92db85ccba0b2a16dd0069842a"><div class="ttname"><a href="group__lavu__buffer.html#ga3e7f4c92db85ccba0b2a16dd0069842a">av_buffer_create</a></div><div class="ttdeci">AVBufferRef * av_buffer_create(uint8_t *data, int size, void(*free)(void *opaque, uint8_t *data), void *opaque, int flags)</div><div class="ttdoc">Create an AVBuffer from an existing array. </div></div>
<div class="ttc" id="group__lavu__buffer_html_gac7c228f9ed54e246dcd270503bed7291"><div class="ttname"><a href="group__lavu__buffer.html#gac7c228f9ed54e246dcd270503bed7291">av_buffer_realloc</a></div><div class="ttdeci">int av_buffer_realloc(AVBufferRef **buf, int size)</div><div class="ttdoc">Reallocate a given buffer. </div></div>
<div class="ttc" id="group__lavu__buffer_html_ga060be34ace567ae378fd0a786e847053"><div class="ttname"><a href="group__lavu__buffer.html#ga060be34ace567ae378fd0a786e847053">av_buffer_is_writable</a></div><div class="ttdeci">int av_buffer_is_writable(const AVBufferRef *buf)</div></div>
<div class="ttc" id="group__lavu__buffer_html_ga5ae84ac902283dea1a660ede06c1cdac"><div class="ttname"><a href="group__lavu__buffer.html#ga5ae84ac902283dea1a660ede06c1cdac">av_buffer_alloc</a></div><div class="ttdeci">AVBufferRef * av_buffer_alloc(int size)</div><div class="ttdoc">Allocate an AVBuffer of the given size using av_malloc(). </div></div>
<div class="ttc" id="structAVBufferRef_html_acb8452e99cd75074b93800b532c6ea4b"><div class="ttname"><a href="structAVBufferRef.html#acb8452e99cd75074b93800b532c6ea4b">AVBufferRef::data</a></div><div class="ttdeci">uint8_t * data</div><div class="ttdoc">The data buffer. </div><div class="ttdef"><b>Definition:</b> <a href="buffer_8h_source.html#l00089">buffer.h:89</a></div></div>
<div class="ttc" id="group__lavu__buffer_html_ga7b16c3976dc555f71d0843bbd023dfcd"><div class="ttname"><a href="group__lavu__buffer.html#ga7b16c3976dc555f71d0843bbd023dfcd">av_buffer_get_ref_count</a></div><div class="ttdeci">int av_buffer_get_ref_count(const AVBufferRef *buf)</div></div>
<div class="ttc" id="group__lavu__buffer_html_ga27f37cc004f768b00442b6cb08091686"><div class="ttname"><a href="group__lavu__buffer.html#ga27f37cc004f768b00442b6cb08091686">av_buffer_allocz</a></div><div class="ttdeci">AVBufferRef * av_buffer_allocz(int size)</div><div class="ttdoc">Same as av_buffer_alloc(), except the returned buffer will be initialized to zero. </div></div>
<div class="ttc" id="structAVBufferRef_html_a3c692274c56720d7903bbd35bcaec3a2"><div class="ttname"><a href="structAVBufferRef.html#a3c692274c56720d7903bbd35bcaec3a2">AVBufferRef::buffer</a></div><div class="ttdeci">AVBuffer * buffer</div><div class="ttdef"><b>Definition:</b> <a href="buffer_8h_source.html#l00082">buffer.h:82</a></div></div>
<div class="ttc" id="group__lavu__buffer_html_gac1c38f469fc9933885cfffafd8cbf0d6"><div class="ttname"><a href="group__lavu__buffer.html#gac1c38f469fc9933885cfffafd8cbf0d6">av_buffer_get_opaque</a></div><div class="ttdeci">void * av_buffer_get_opaque(const AVBufferRef *buf)</div></div>
<div class="ttc" id="group__lavu__bufferpool_html_ga7b76781c5944b3bb59b2e3b1a8994e4a"><div class="ttname"><a href="group__lavu__bufferpool.html#ga7b76781c5944b3bb59b2e3b1a8994e4a">av_buffer_pool_uninit</a></div><div class="ttdeci">void av_buffer_pool_uninit(AVBufferPool **pool)</div><div class="ttdoc">Mark the pool as being available for freeing. </div></div>
<div class="ttc" id="structAVBufferRef_html_a55f17b82a5af97259a5e8a3fd9647a08"><div class="ttname"><a href="structAVBufferRef.html#a55f17b82a5af97259a5e8a3fd9647a08">AVBufferRef::size</a></div><div class="ttdeci">int size</div><div class="ttdoc">Size of data in bytes. </div><div class="ttdef"><b>Definition:</b> <a href="buffer_8h_source.html#l00093">buffer.h:93</a></div></div>
<div class="ttc" id="structAVBufferRef_html"><div class="ttname"><a href="structAVBufferRef.html">AVBufferRef</a></div><div class="ttdoc">A reference to a data buffer. </div><div class="ttdef"><b>Definition:</b> <a href="buffer_8h_source.html#l00081">buffer.h:81</a></div></div>
<div class="ttc" id="group__lavu__bufferpool_html_ga26af9b07c08bc7fd2cfc62767e490b93"><div class="ttname"><a href="group__lavu__bufferpool.html#ga26af9b07c08bc7fd2cfc62767e490b93">av_buffer_pool_init</a></div><div class="ttdeci">AVBufferPool * av_buffer_pool_init(int size, AVBufferRef *(*alloc)(int size))</div><div class="ttdoc">Allocate and initialize a buffer pool. </div></div>
<div class="ttc" id="group__lavu__buffer_html_gaa40ce7d3ede946a89d03323bbd7268c1"><div class="ttname"><a href="group__lavu__buffer.html#gaa40ce7d3ede946a89d03323bbd7268c1">av_buffer_ref</a></div><div class="ttdeci">AVBufferRef * av_buffer_ref(AVBufferRef *buf)</div><div class="ttdoc">Create a new reference to an AVBuffer. </div></div>
<div class="ttc" id="group__lavu__bufferpool_html_ga2c745ecb4001452423e775b06b20fb7c"><div class="ttname"><a href="group__lavu__bufferpool.html#ga2c745ecb4001452423e775b06b20fb7c">av_buffer_pool_get</a></div><div class="ttdeci">AVBufferRef * av_buffer_pool_get(AVBufferPool *pool)</div><div class="ttdoc">Allocate a new AVBuffer, reusing an old buffer from the pool when available. </div></div>
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