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<li class="navelem"><a class="el" href="dir_8d855866ba5d436d839c7fc557836cd9.html">libavutil</a></li> </ul>
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<a href="mem_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) 2006 Michael Niedermayer <michaelni@gmx.at></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> <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"> * @file</span></div>
<div class="line"><a name="l00023"></a><span class="lineno"> 23</span> <span class="comment"> * memory handling functions</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> </div>
<div class="line"><a name="l00026"></a><span class="lineno"> 26</span> <span class="preprocessor">#ifndef AVUTIL_MEM_H</span></div>
<div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="preprocessor"></span><span class="preprocessor">#define AVUTIL_MEM_H</span></div>
<div class="line"><a name="l00028"></a><span class="lineno"> 28</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00029"></a><span class="lineno"> 29</span> <span class="preprocessor">#include <limits.h></span></div>
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="preprocessor">#include <stdint.h></span></div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span> </div>
<div class="line"><a name="l00032"></a><span class="lineno"> 32</span> <span class="preprocessor">#include "<a class="code" href="attributes_8h.html">attributes.h</a>"</span></div>
<div class="line"><a name="l00033"></a><span class="lineno"> 33</span> <span class="preprocessor">#include "<a class="code" href="error_8h.html">error.h</a>"</span></div>
<div class="line"><a name="l00034"></a><span class="lineno"> 34</span> <span class="preprocessor">#include "<a class="code" href="avutil_8h.html">avutil.h</a>"</span></div>
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span> <span class="comment"></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"> * @addtogroup lavu_mem</span></div>
<div class="line"><a name="l00038"></a><span class="lineno"> 38</span> <span class="comment"> * @{</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> </div>
<div class="line"><a name="l00041"></a><span class="lineno"> 41</span> </div>
<div class="line"><a name="l00042"></a><span class="lineno"> 42</span> <span class="preprocessor">#if defined(__INTEL_COMPILER) && __INTEL_COMPILER < 1110 || defined(__SUNPRO_C)</span></div>
<div class="line"><a name="l00043"></a><span class="lineno"> 43</span> <span class="preprocessor"></span><span class="preprocessor"> #define DECLARE_ALIGNED(n,t,v) t __attribute__ ((aligned (n))) v</span></div>
<div class="line"><a name="l00044"></a><span class="lineno"> 44</span> <span class="preprocessor"></span><span class="preprocessor"> #define DECLARE_ASM_CONST(n,t,v) const t __attribute__ ((aligned (n))) v</span></div>
<div class="line"><a name="l00045"></a><span class="lineno"> 45</span> <span class="preprocessor"></span><span class="preprocessor">#elif defined(__TI_COMPILER_VERSION__)</span></div>
<div class="line"><a name="l00046"></a><span class="lineno"> 46</span> <span class="preprocessor"></span><span class="preprocessor"> #define DECLARE_ALIGNED(n,t,v) \</span></div>
<div class="line"><a name="l00047"></a><span class="lineno"> 47</span> <span class="preprocessor"> AV_PRAGMA(DATA_ALIGN(v,n)) \</span></div>
<div class="line"><a name="l00048"></a><span class="lineno"> 48</span> <span class="preprocessor"> t __attribute__((aligned(n))) v</span></div>
<div class="line"><a name="l00049"></a><span class="lineno"> 49</span> <span class="preprocessor"></span><span class="preprocessor"> #define DECLARE_ASM_CONST(n,t,v) \</span></div>
<div class="line"><a name="l00050"></a><span class="lineno"> 50</span> <span class="preprocessor"> AV_PRAGMA(DATA_ALIGN(v,n)) \</span></div>
<div class="line"><a name="l00051"></a><span class="lineno"> 51</span> <span class="preprocessor"> static const t __attribute__((aligned(n))) v</span></div>
<div class="line"><a name="l00052"></a><span class="lineno"> 52</span> <span class="preprocessor"></span><span class="preprocessor">#elif defined(__GNUC__)</span></div>
<div class="line"><a name="l00053"></a><span class="lineno"><a class="line" href="group__lavu__mem.html#ga7a422611f83afb33d6e0da44184b548e"> 53</a></span> <span class="preprocessor"></span><span class="preprocessor"> #define DECLARE_ALIGNED(n,t,v) t __attribute__ ((aligned (n))) v</span></div>
<div class="line"><a name="l00054"></a><span class="lineno"><a class="line" href="group__lavu__mem.html#ga6e5cdd0ac639d7dea5033df3b64cfe3c"> 54</a></span> <span class="preprocessor"></span><span class="preprocessor"> #define DECLARE_ASM_CONST(n,t,v) static const t av_used __attribute__ ((aligned (n))) v</span></div>
<div class="line"><a name="l00055"></a><span class="lineno"> 55</span> <span class="preprocessor"></span><span class="preprocessor">#elif defined(_MSC_VER)</span></div>
<div class="line"><a name="l00056"></a><span class="lineno"> 56</span> <span class="preprocessor"></span><span class="preprocessor"> #define DECLARE_ALIGNED(n,t,v) __declspec(align(n)) t v</span></div>
<div class="line"><a name="l00057"></a><span class="lineno"> 57</span> <span class="preprocessor"></span><span class="preprocessor"> #define DECLARE_ASM_CONST(n,t,v) __declspec(align(n)) static const t v</span></div>
<div class="line"><a name="l00058"></a><span class="lineno"> 58</span> <span class="preprocessor"></span><span class="preprocessor">#else</span></div>
<div class="line"><a name="l00059"></a><span class="lineno"> 59</span> <span class="preprocessor"></span><span class="preprocessor"> #define DECLARE_ALIGNED(n,t,v) t v</span></div>
<div class="line"><a name="l00060"></a><span class="lineno"> 60</span> <span class="preprocessor"></span><span class="preprocessor"> #define DECLARE_ASM_CONST(n,t,v) static const t v</span></div>
<div class="line"><a name="l00061"></a><span class="lineno"> 61</span> <span class="preprocessor"></span><span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span> <span class="preprocessor">#if AV_GCC_VERSION_AT_LEAST(3,1)</span></div>
<div class="line"><a name="l00064"></a><span class="lineno"><a class="line" href="group__lavu__mem.html#gad48ff724186ef4e602ae7a2547e4287c"> 64</a></span> <span class="preprocessor"></span><span class="preprocessor"> #define av_malloc_attrib __attribute__((__malloc__))</span></div>
<div class="line"><a name="l00065"></a><span class="lineno"> 65</span> <span class="preprocessor"></span><span class="preprocessor">#else</span></div>
<div class="line"><a name="l00066"></a><span class="lineno"> 66</span> <span class="preprocessor"></span><span class="preprocessor"> #define av_malloc_attrib</span></div>
<div class="line"><a name="l00067"></a><span class="lineno"> 67</span> <span class="preprocessor"></span><span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00069"></a><span class="lineno"> 69</span> <span class="preprocessor">#if AV_GCC_VERSION_AT_LEAST(4,3)</span></div>
<div class="line"><a name="l00070"></a><span class="lineno"><a class="line" href="group__lavu__mem.html#gad7ff928d462d1a61b37baa70bf13e0e3"> 70</a></span> <span class="preprocessor"></span><span class="preprocessor"> #define av_alloc_size(...) __attribute__((alloc_size(__VA_ARGS__)))</span></div>
<div class="line"><a name="l00071"></a><span class="lineno"> 71</span> <span class="preprocessor"></span><span class="preprocessor">#else</span></div>
<div class="line"><a name="l00072"></a><span class="lineno"> 72</span> <span class="preprocessor"></span><span class="preprocessor"> #define av_alloc_size(...)</span></div>
<div class="line"><a name="l00073"></a><span class="lineno"> 73</span> <span class="preprocessor"></span><span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00074"></a><span class="lineno"> 74</span> <span class="preprocessor"></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"> * Allocate a block of size bytes with alignment suitable for all</span></div>
<div class="line"><a name="l00077"></a><span class="lineno"> 77</span> <span class="comment"> * memory accesses (including vectors if available on the CPU).</span></div>
<div class="line"><a name="l00078"></a><span class="lineno"> 78</span> <span class="comment"> * @param size Size in bytes for the memory block to be allocated.</span></div>
<div class="line"><a name="l00079"></a><span class="lineno"> 79</span> <span class="comment"> * @return Pointer to the allocated block, NULL if the block cannot</span></div>
<div class="line"><a name="l00080"></a><span class="lineno"> 80</span> <span class="comment"> * be allocated.</span></div>
<div class="line"><a name="l00081"></a><span class="lineno"> 81</span> <span class="comment"> * @see av_mallocz()</span></div>
<div class="line"><a name="l00082"></a><span class="lineno"> 82</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00083"></a><span class="lineno"> 83</span> <span class="keywordtype">void</span> *<a class="code" href="group__lavu__mem.html#ga9722446c5e310ffedfaac9489864796d">av_malloc</a>(<span class="keywordtype">size_t</span> size) <a class="code" href="group__lavu__mem.html#gad48ff724186ef4e602ae7a2547e4287c">av_malloc_attrib</a> <a class="code" href="group__lavu__mem.html#gad7ff928d462d1a61b37baa70bf13e0e3">av_alloc_size</a>(1);</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">/**</span></div>
<div class="line"><a name="l00086"></a><span class="lineno"> 86</span> <span class="comment"> * Allocate a block of size * nmemb bytes with av_malloc().</span></div>
<div class="line"><a name="l00087"></a><span class="lineno"> 87</span> <span class="comment"> * @param nmemb Number of elements</span></div>
<div class="line"><a name="l00088"></a><span class="lineno"> 88</span> <span class="comment"> * @param size Size of the single element</span></div>
<div class="line"><a name="l00089"></a><span class="lineno"> 89</span> <span class="comment"> * @return Pointer to the allocated block, NULL if the block cannot</span></div>
<div class="line"><a name="l00090"></a><span class="lineno"> 90</span> <span class="comment"> * be allocated.</span></div>
<div class="line"><a name="l00091"></a><span class="lineno"> 91</span> <span class="comment"> * @see av_malloc()</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="group__lavu__mem.html#gab62b093b46dce5fe4e3e1d58bdb255da"> 93</a></span> <a class="code" href="group__lavu__mem.html#gad7ff928d462d1a61b37baa70bf13e0e3">av_alloc_size</a>(1, 2) static inline <span class="keywordtype">void</span> *<a class="code" href="group__lavu__mem.html#gab62b093b46dce5fe4e3e1d58bdb255da">av_malloc_array</a>(<span class="keywordtype">size_t</span> nmemb, <span class="keywordtype">size_t</span> size)</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="keywordflow">if</span> (!size || nmemb >= INT_MAX / size)</div>
<div class="line"><a name="l00096"></a><span class="lineno"> 96</span>  <span class="keywordflow">return</span> NULL;</div>
<div class="line"><a name="l00097"></a><span class="lineno"> 97</span>  <span class="keywordflow">return</span> <a class="code" href="group__lavu__mem.html#ga9722446c5e310ffedfaac9489864796d">av_malloc</a>(nmemb * size);</div>
<div class="line"><a name="l00098"></a><span class="lineno"> 98</span> }</div>
<div class="line"><a name="l00099"></a><span class="lineno"> 99</span> <span class="comment"></span></div>
<div class="line"><a name="l00100"></a><span class="lineno"> 100</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00101"></a><span class="lineno"> 101</span> <span class="comment"> * Allocate or reallocate a block of memory.</span></div>
<div class="line"><a name="l00102"></a><span class="lineno"> 102</span> <span class="comment"> * If ptr is NULL and size > 0, allocate a new block. If</span></div>
<div class="line"><a name="l00103"></a><span class="lineno"> 103</span> <span class="comment"> * size is zero, free the memory block pointed to by ptr.</span></div>
<div class="line"><a name="l00104"></a><span class="lineno"> 104</span> <span class="comment"> * @param ptr Pointer to a memory block already allocated with</span></div>
<div class="line"><a name="l00105"></a><span class="lineno"> 105</span> <span class="comment"> * av_realloc() or NULL.</span></div>
<div class="line"><a name="l00106"></a><span class="lineno"> 106</span> <span class="comment"> * @param size Size in bytes of the memory block to be allocated or</span></div>
<div class="line"><a name="l00107"></a><span class="lineno"> 107</span> <span class="comment"> * reallocated.</span></div>
<div class="line"><a name="l00108"></a><span class="lineno"> 108</span> <span class="comment"> * @return Pointer to a newly-reallocated block or NULL if the block</span></div>
<div class="line"><a name="l00109"></a><span class="lineno"> 109</span> <span class="comment"> * cannot be reallocated or the function is used to free the memory block.</span></div>
<div class="line"><a name="l00110"></a><span class="lineno"> 110</span> <span class="comment"> * @warning Pointers originating from the av_malloc() family of functions must</span></div>
<div class="line"><a name="l00111"></a><span class="lineno"> 111</span> <span class="comment"> * not be passed to av_realloc(). The former can be implemented using</span></div>
<div class="line"><a name="l00112"></a><span class="lineno"> 112</span> <span class="comment"> * memalign() (or other functions), and there is no guarantee that</span></div>
<div class="line"><a name="l00113"></a><span class="lineno"> 113</span> <span class="comment"> * pointers from such functions can be passed to realloc() at all.</span></div>
<div class="line"><a name="l00114"></a><span class="lineno"> 114</span> <span class="comment"> * The situation is undefined according to POSIX and may crash with</span></div>
<div class="line"><a name="l00115"></a><span class="lineno"> 115</span> <span class="comment"> * some libc implementations.</span></div>
<div class="line"><a name="l00116"></a><span class="lineno"> 116</span> <span class="comment"> * @see av_fast_realloc()</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="keywordtype">void</span> *<a class="code" href="group__lavu__mem.html#ga675a8e3b2f7353329b79a3c55010d612">av_realloc</a>(<span class="keywordtype">void</span> *ptr, <span class="keywordtype">size_t</span> size) <a class="code" href="group__lavu__mem.html#gad7ff928d462d1a61b37baa70bf13e0e3">av_alloc_size</a>(2);</div>
<div class="line"><a name="l00119"></a><span class="lineno"> 119</span> <span class="comment"></span></div>
<div class="line"><a name="l00120"></a><span class="lineno"> 120</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00121"></a><span class="lineno"> 121</span> <span class="comment"> * Allocate or reallocate a block of memory.</span></div>
<div class="line"><a name="l00122"></a><span class="lineno"> 122</span> <span class="comment"> * This function does the same thing as av_realloc, except:</span></div>
<div class="line"><a name="l00123"></a><span class="lineno"> 123</span> <span class="comment"> * - It takes two arguments and checks the result of the multiplication for</span></div>
<div class="line"><a name="l00124"></a><span class="lineno"> 124</span> <span class="comment"> * integer overflow.</span></div>
<div class="line"><a name="l00125"></a><span class="lineno"> 125</span> <span class="comment"> * - It frees the input block in case of failure, thus avoiding the memory</span></div>
<div class="line"><a name="l00126"></a><span class="lineno"> 126</span> <span class="comment"> * leak with the classic "buf = realloc(buf); if (!buf) return -1;".</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="keywordtype">void</span> *<a class="code" href="group__lavu__mem.html#gae5ca394e7536fcd2689008b011a211ad">av_realloc_f</a>(<span class="keywordtype">void</span> *ptr, <span class="keywordtype">size_t</span> nelem, <span class="keywordtype">size_t</span> elsize);</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">/**</span></div>
<div class="line"><a name="l00131"></a><span class="lineno"> 131</span> <span class="comment"> * Allocate or reallocate a block of memory.</span></div>
<div class="line"><a name="l00132"></a><span class="lineno"> 132</span> <span class="comment"> * If *ptr is NULL and size > 0, allocate a new block. If</span></div>
<div class="line"><a name="l00133"></a><span class="lineno"> 133</span> <span class="comment"> * size is zero, free the memory block pointed to by ptr.</span></div>
<div class="line"><a name="l00134"></a><span class="lineno"> 134</span> <span class="comment"> * @param ptr Pointer to a pointer to a memory block already allocated</span></div>
<div class="line"><a name="l00135"></a><span class="lineno"> 135</span> <span class="comment"> * with av_realloc(), or pointer to a pointer to NULL.</span></div>
<div class="line"><a name="l00136"></a><span class="lineno"> 136</span> <span class="comment"> * The pointer is updated on success, or freed on failure.</span></div>
<div class="line"><a name="l00137"></a><span class="lineno"> 137</span> <span class="comment"> * @param size Size in bytes for the memory block to be allocated or</span></div>
<div class="line"><a name="l00138"></a><span class="lineno"> 138</span> <span class="comment"> * reallocated</span></div>
<div class="line"><a name="l00139"></a><span class="lineno"> 139</span> <span class="comment"> * @return Zero on success, an AVERROR error code on failure.</span></div>
<div class="line"><a name="l00140"></a><span class="lineno"> 140</span> <span class="comment"> * @warning Pointers originating from the av_malloc() family of functions must</span></div>
<div class="line"><a name="l00141"></a><span class="lineno"> 141</span> <span class="comment"> * not be passed to av_reallocp(). The former can be implemented using</span></div>
<div class="line"><a name="l00142"></a><span class="lineno"> 142</span> <span class="comment"> * memalign() (or other functions), and there is no guarantee that</span></div>
<div class="line"><a name="l00143"></a><span class="lineno"> 143</span> <span class="comment"> * pointers from such functions can be passed to realloc() at all.</span></div>
<div class="line"><a name="l00144"></a><span class="lineno"> 144</span> <span class="comment"> * The situation is undefined according to POSIX and may crash with</span></div>
<div class="line"><a name="l00145"></a><span class="lineno"> 145</span> <span class="comment"> * some libc implementations.</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="attributes_8h.html#a93f17e0f0b53a66e7b5eceb3dff2918f">av_warn_unused_result</a></div>
<div class="line"><a name="l00148"></a><span class="lineno"> 148</span> <span class="keywordtype">int</span> <a class="code" href="group__lavu__mem.html#ga9665abf3720f9f460790c2c3b224c052">av_reallocp</a>(<span class="keywordtype">void</span> *ptr, <span class="keywordtype">size_t</span> size);</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">/**</span></div>
<div class="line"><a name="l00151"></a><span class="lineno"> 151</span> <span class="comment"> * Allocate or reallocate an array.</span></div>
<div class="line"><a name="l00152"></a><span class="lineno"> 152</span> <span class="comment"> * If ptr is NULL and nmemb > 0, allocate a new block. If</span></div>
<div class="line"><a name="l00153"></a><span class="lineno"> 153</span> <span class="comment"> * nmemb is zero, free the memory block pointed to by ptr.</span></div>
<div class="line"><a name="l00154"></a><span class="lineno"> 154</span> <span class="comment"> * @param ptr Pointer to a memory block already allocated with</span></div>
<div class="line"><a name="l00155"></a><span class="lineno"> 155</span> <span class="comment"> * av_realloc() or NULL.</span></div>
<div class="line"><a name="l00156"></a><span class="lineno"> 156</span> <span class="comment"> * @param nmemb Number of elements</span></div>
<div class="line"><a name="l00157"></a><span class="lineno"> 157</span> <span class="comment"> * @param size Size of the single element</span></div>
<div class="line"><a name="l00158"></a><span class="lineno"> 158</span> <span class="comment"> * @return Pointer to a newly-reallocated block or NULL if the block</span></div>
<div class="line"><a name="l00159"></a><span class="lineno"> 159</span> <span class="comment"> * cannot be reallocated or the function is used to free the memory block.</span></div>
<div class="line"><a name="l00160"></a><span class="lineno"> 160</span> <span class="comment"> * @warning Pointers originating from the av_malloc() family of functions must</span></div>
<div class="line"><a name="l00161"></a><span class="lineno"> 161</span> <span class="comment"> * not be passed to av_realloc(). The former can be implemented using</span></div>
<div class="line"><a name="l00162"></a><span class="lineno"> 162</span> <span class="comment"> * memalign() (or other functions), and there is no guarantee that</span></div>
<div class="line"><a name="l00163"></a><span class="lineno"> 163</span> <span class="comment"> * pointers from such functions can be passed to realloc() at all.</span></div>
<div class="line"><a name="l00164"></a><span class="lineno"> 164</span> <span class="comment"> * The situation is undefined according to POSIX and may crash with</span></div>
<div class="line"><a name="l00165"></a><span class="lineno"> 165</span> <span class="comment"> * some libc implementations.</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> <a class="code" href="group__lavu__mem.html#gad7ff928d462d1a61b37baa70bf13e0e3">av_alloc_size</a>(2, 3) void *<a class="code" href="group__lavu__mem.html#gaadc230ece36ef112710b262a6601a16b">av_realloc_array</a>(<span class="keywordtype">void</span> *ptr, <span class="keywordtype">size_t</span> nmemb, <span class="keywordtype">size_t</span> size);</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> <span class="comment">/**</span></div>
<div class="line"><a name="l00170"></a><span class="lineno"> 170</span> <span class="comment"> * Allocate or reallocate an array through a pointer to a pointer.</span></div>
<div class="line"><a name="l00171"></a><span class="lineno"> 171</span> <span class="comment"> * If *ptr is NULL and nmemb > 0, allocate a new block. If</span></div>
<div class="line"><a name="l00172"></a><span class="lineno"> 172</span> <span class="comment"> * nmemb is zero, free the memory block pointed to by ptr.</span></div>
<div class="line"><a name="l00173"></a><span class="lineno"> 173</span> <span class="comment"> * @param ptr Pointer to a pointer to a memory block already allocated</span></div>
<div class="line"><a name="l00174"></a><span class="lineno"> 174</span> <span class="comment"> * with av_realloc(), or pointer to a pointer to NULL.</span></div>
<div class="line"><a name="l00175"></a><span class="lineno"> 175</span> <span class="comment"> * The pointer is updated on success, or freed on failure.</span></div>
<div class="line"><a name="l00176"></a><span class="lineno"> 176</span> <span class="comment"> * @param nmemb Number of elements</span></div>
<div class="line"><a name="l00177"></a><span class="lineno"> 177</span> <span class="comment"> * @param size Size of the single element</span></div>
<div class="line"><a name="l00178"></a><span class="lineno"> 178</span> <span class="comment"> * @return Zero on success, an AVERROR error code on failure.</span></div>
<div class="line"><a name="l00179"></a><span class="lineno"> 179</span> <span class="comment"> * @warning Pointers originating from the av_malloc() family of functions must</span></div>
<div class="line"><a name="l00180"></a><span class="lineno"> 180</span> <span class="comment"> * not be passed to av_realloc(). The former can be implemented using</span></div>
<div class="line"><a name="l00181"></a><span class="lineno"> 181</span> <span class="comment"> * memalign() (or other functions), and there is no guarantee that</span></div>
<div class="line"><a name="l00182"></a><span class="lineno"> 182</span> <span class="comment"> * pointers from such functions can be passed to realloc() at all.</span></div>
<div class="line"><a name="l00183"></a><span class="lineno"> 183</span> <span class="comment"> * The situation is undefined according to POSIX and may crash with</span></div>
<div class="line"><a name="l00184"></a><span class="lineno"> 184</span> <span class="comment"> * some libc implementations.</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> <a class="code" href="group__lavu__mem.html#gad7ff928d462d1a61b37baa70bf13e0e3">av_alloc_size</a>(2, 3) <span class="keywordtype">int</span> <a class="code" href="group__lavu__mem.html#gad8fde0c159ac905909339e082a049cde">av_reallocp_array</a>(<span class="keywordtype">void</span> *ptr, <span class="keywordtype">size_t</span> nmemb, <span class="keywordtype">size_t</span> size);</div>
<div class="line"><a name="l00187"></a><span class="lineno"> 187</span> <span class="comment"></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="comment"> * Free a memory block which has been allocated with av_malloc(z)() or</span></div>
<div class="line"><a name="l00190"></a><span class="lineno"> 190</span> <span class="comment"> * av_realloc().</span></div>
<div class="line"><a name="l00191"></a><span class="lineno"> 191</span> <span class="comment"> * @param ptr Pointer to the memory block which should be freed.</span></div>
<div class="line"><a name="l00192"></a><span class="lineno"> 192</span> <span class="comment"> * @note ptr = NULL is explicitly allowed.</span></div>
<div class="line"><a name="l00193"></a><span class="lineno"> 193</span> <span class="comment"> * @note It is recommended that you use av_freep() instead.</span></div>
<div class="line"><a name="l00194"></a><span class="lineno"> 194</span> <span class="comment"> * @see av_freep()</span></div>
<div class="line"><a name="l00195"></a><span class="lineno"> 195</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00196"></a><span class="lineno"> 196</span> <span class="keywordtype">void</span> <a class="code" href="group__lavu__mem.html#ga0c9096f498624c525aa2315b8a20c411">av_free</a>(<span class="keywordtype">void</span> *ptr);</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="comment">/**</span></div>
<div class="line"><a name="l00199"></a><span class="lineno"> 199</span> <span class="comment"> * Allocate a block of size bytes with alignment suitable for all</span></div>
<div class="line"><a name="l00200"></a><span class="lineno"> 200</span> <span class="comment"> * memory accesses (including vectors if available on the CPU) and</span></div>
<div class="line"><a name="l00201"></a><span class="lineno"> 201</span> <span class="comment"> * zero all the bytes of the block.</span></div>
<div class="line"><a name="l00202"></a><span class="lineno"> 202</span> <span class="comment"> * @param size Size in bytes for the memory block to be allocated.</span></div>
<div class="line"><a name="l00203"></a><span class="lineno"> 203</span> <span class="comment"> * @return Pointer to the allocated block, NULL if it cannot be allocated.</span></div>
<div class="line"><a name="l00204"></a><span class="lineno"> 204</span> <span class="comment"> * @see av_malloc()</span></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="keywordtype">void</span> *<a class="code" href="group__lavu__mem.html#ga0a8cc057ae9723ce3b9203cb5365971a">av_mallocz</a>(<span class="keywordtype">size_t</span> size) <a class="code" href="group__lavu__mem.html#gad48ff724186ef4e602ae7a2547e4287c">av_malloc_attrib</a> <a class="code" href="group__lavu__mem.html#gad7ff928d462d1a61b37baa70bf13e0e3">av_alloc_size</a>(1);</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"> * Allocate a block of nmemb * size bytes with alignment suitable for all</span></div>
<div class="line"><a name="l00210"></a><span class="lineno"> 210</span> <span class="comment"> * memory accesses (including vectors if available on the CPU) and</span></div>
<div class="line"><a name="l00211"></a><span class="lineno"> 211</span> <span class="comment"> * zero all the bytes of the block.</span></div>
<div class="line"><a name="l00212"></a><span class="lineno"> 212</span> <span class="comment"> * The allocation will fail if nmemb * size is greater than or equal</span></div>
<div class="line"><a name="l00213"></a><span class="lineno"> 213</span> <span class="comment"> * to INT_MAX.</span></div>
<div class="line"><a name="l00214"></a><span class="lineno"> 214</span> <span class="comment"> * @param nmemb</span></div>
<div class="line"><a name="l00215"></a><span class="lineno"> 215</span> <span class="comment"> * @param size</span></div>
<div class="line"><a name="l00216"></a><span class="lineno"> 216</span> <span class="comment"> * @return Pointer to the allocated block, NULL if it cannot be allocated.</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="keywordtype">void</span> *<a class="code" href="group__lavu__mem.html#gaaf38f6d994f5a85854ef47fd98fa6e9a">av_calloc</a>(<span class="keywordtype">size_t</span> nmemb, <span class="keywordtype">size_t</span> size) <a class="code" href="group__lavu__mem.html#gad48ff724186ef4e602ae7a2547e4287c">av_malloc_attrib</a>;</div>
<div class="line"><a name="l00219"></a><span class="lineno"> 219</span> <span class="comment"></span></div>
<div class="line"><a name="l00220"></a><span class="lineno"> 220</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00221"></a><span class="lineno"> 221</span> <span class="comment"> * Allocate a block of size * nmemb bytes with av_mallocz().</span></div>
<div class="line"><a name="l00222"></a><span class="lineno"> 222</span> <span class="comment"> * @param nmemb Number of elements</span></div>
<div class="line"><a name="l00223"></a><span class="lineno"> 223</span> <span class="comment"> * @param size Size of the single element</span></div>
<div class="line"><a name="l00224"></a><span class="lineno"> 224</span> <span class="comment"> * @return Pointer to the allocated block, NULL if the block cannot</span></div>
<div class="line"><a name="l00225"></a><span class="lineno"> 225</span> <span class="comment"> * be allocated.</span></div>
<div class="line"><a name="l00226"></a><span class="lineno"> 226</span> <span class="comment"> * @see av_mallocz()</span></div>
<div class="line"><a name="l00227"></a><span class="lineno"> 227</span> <span class="comment"> * @see av_malloc_array()</span></div>
<div class="line"><a name="l00228"></a><span class="lineno"> 228</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00229"></a><span class="lineno"><a class="line" href="group__lavu__mem.html#gae0443f550815c80af42c5ae967351433"> 229</a></span> av_alloc_size(1, 2) static inline <span class="keywordtype">void</span> *<a class="code" href="group__lavu__mem.html#gae0443f550815c80af42c5ae967351433">av_mallocz_array</a>(<span class="keywordtype">size_t</span> nmemb, <span class="keywordtype">size_t</span> size)</div>
<div class="line"><a name="l00230"></a><span class="lineno"> 230</span> {</div>
<div class="line"><a name="l00231"></a><span class="lineno"> 231</span>  <span class="keywordflow">if</span> (!size || nmemb >= INT_MAX / size)</div>
<div class="line"><a name="l00232"></a><span class="lineno"> 232</span>  <span class="keywordflow">return</span> NULL;</div>
<div class="line"><a name="l00233"></a><span class="lineno"> 233</span>  <span class="keywordflow">return</span> <a class="code" href="group__lavu__mem.html#ga0a8cc057ae9723ce3b9203cb5365971a">av_mallocz</a>(nmemb * size);</div>
<div class="line"><a name="l00234"></a><span class="lineno"> 234</span> }</div>
<div class="line"><a name="l00235"></a><span class="lineno"> 235</span> <span class="comment"></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="comment"> * Duplicate the string s.</span></div>
<div class="line"><a name="l00238"></a><span class="lineno"> 238</span> <span class="comment"> * @param s string to be duplicated</span></div>
<div class="line"><a name="l00239"></a><span class="lineno"> 239</span> <span class="comment"> * @return Pointer to a newly-allocated string containing a</span></div>
<div class="line"><a name="l00240"></a><span class="lineno"> 240</span> <span class="comment"> * copy of s or NULL if the string cannot be allocated.</span></div>
<div class="line"><a name="l00241"></a><span class="lineno"> 241</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00242"></a><span class="lineno"> 242</span> <span class="keywordtype">char</span> *<a class="code" href="group__lavu__mem.html#ga7c352f4cff02184f005323691375fea9">av_strdup</a>(<span class="keyword">const</span> <span class="keywordtype">char</span> *s) <a class="code" href="group__lavu__mem.html#gad48ff724186ef4e602ae7a2547e4287c">av_malloc_attrib</a>;</div>
<div class="line"><a name="l00243"></a><span class="lineno"> 243</span> <span class="comment"></span></div>
<div class="line"><a name="l00244"></a><span class="lineno"> 244</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00245"></a><span class="lineno"> 245</span> <span class="comment"> * Duplicate a substring of the string s.</span></div>
<div class="line"><a name="l00246"></a><span class="lineno"> 246</span> <span class="comment"> * @param s string to be duplicated</span></div>
<div class="line"><a name="l00247"></a><span class="lineno"> 247</span> <span class="comment"> * @param len the maximum length of the resulting string (not counting the</span></div>
<div class="line"><a name="l00248"></a><span class="lineno"> 248</span> <span class="comment"> * terminating byte).</span></div>
<div class="line"><a name="l00249"></a><span class="lineno"> 249</span> <span class="comment"> * @return Pointer to a newly-allocated string containing a</span></div>
<div class="line"><a name="l00250"></a><span class="lineno"> 250</span> <span class="comment"> * copy of s or NULL if the string cannot be allocated.</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="keywordtype">char</span> *<a class="code" href="group__lavu__mem.html#gaffde7a717e3a603ed11a998c18d68cad">av_strndup</a>(<span class="keyword">const</span> <span class="keywordtype">char</span> *s, <span class="keywordtype">size_t</span> len) <a class="code" href="group__lavu__mem.html#gad48ff724186ef4e602ae7a2547e4287c">av_malloc_attrib</a>;</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="comment">/**</span></div>
<div class="line"><a name="l00255"></a><span class="lineno"> 255</span> <span class="comment"> * Duplicate the buffer p.</span></div>
<div class="line"><a name="l00256"></a><span class="lineno"> 256</span> <span class="comment"> * @param p buffer to be duplicated</span></div>
<div class="line"><a name="l00257"></a><span class="lineno"> 257</span> <span class="comment"> * @return Pointer to a newly allocated buffer containing a</span></div>
<div class="line"><a name="l00258"></a><span class="lineno"> 258</span> <span class="comment"> * copy of p or NULL if the buffer cannot be allocated.</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__mem.html#ga4ad5e6363f4a6b6eddfdb427e21166f2">av_memdup</a>(<span class="keyword">const</span> <span class="keywordtype">void</span> *p, <span class="keywordtype">size_t</span> size);</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"> * Free a memory block which has been allocated with av_malloc(z)() or</span></div>
<div class="line"><a name="l00264"></a><span class="lineno"> 264</span> <span class="comment"> * av_realloc() and set the pointer pointing to it to NULL.</span></div>
<div class="line"><a name="l00265"></a><span class="lineno"> 265</span> <span class="comment"> * @param ptr Pointer to the pointer to the memory block which should</span></div>
<div class="line"><a name="l00266"></a><span class="lineno"> 266</span> <span class="comment"> * be freed.</span></div>
<div class="line"><a name="l00267"></a><span class="lineno"> 267</span> <span class="comment"> * @note passing a pointer to a NULL pointer is safe and leads to no action.</span></div>
<div class="line"><a name="l00268"></a><span class="lineno"> 268</span> <span class="comment"> * @see av_free()</span></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="keywordtype">void</span> <a class="code" href="group__lavu__mem.html#ga0cc84043ea2167ad005c86e11d0bcdba">av_freep</a>(<span class="keywordtype">void</span> *ptr);</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> <span class="comment"> * Add an element to a dynamic array.</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="comment"> * The array to grow is supposed to be an array of pointers to</span></div>
<div class="line"><a name="l00276"></a><span class="lineno"> 276</span> <span class="comment"> * structures, and the element to add must be a pointer to an already</span></div>
<div class="line"><a name="l00277"></a><span class="lineno"> 277</span> <span class="comment"> * allocated structure.</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"> * The array is reallocated when its size reaches powers of 2.</span></div>
<div class="line"><a name="l00280"></a><span class="lineno"> 280</span> <span class="comment"> * Therefore, the amortized cost of adding an element is constant.</span></div>
<div class="line"><a name="l00281"></a><span class="lineno"> 281</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00282"></a><span class="lineno"> 282</span> <span class="comment"> * In case of success, the pointer to the array is updated in order to</span></div>
<div class="line"><a name="l00283"></a><span class="lineno"> 283</span> <span class="comment"> * point to the new grown array, and the number pointed to by nb_ptr</span></div>
<div class="line"><a name="l00284"></a><span class="lineno"> 284</span> <span class="comment"> * is incremented.</span></div>
<div class="line"><a name="l00285"></a><span class="lineno"> 285</span> <span class="comment"> * In case of failure, the array is freed, *tab_ptr is set to NULL and</span></div>
<div class="line"><a name="l00286"></a><span class="lineno"> 286</span> <span class="comment"> * *nb_ptr is set to 0.</span></div>
<div class="line"><a name="l00287"></a><span class="lineno"> 287</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00288"></a><span class="lineno"> 288</span> <span class="comment"> * @param tab_ptr pointer to the array to grow</span></div>
<div class="line"><a name="l00289"></a><span class="lineno"> 289</span> <span class="comment"> * @param nb_ptr pointer to the number of elements in the array</span></div>
<div class="line"><a name="l00290"></a><span class="lineno"> 290</span> <span class="comment"> * @param elem element to add</span></div>
<div class="line"><a name="l00291"></a><span class="lineno"> 291</span> <span class="comment"> * @see av_dynarray_add_nofree(), av_dynarray2_add()</span></div>
<div class="line"><a name="l00292"></a><span class="lineno"> 292</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00293"></a><span class="lineno"> 293</span> <span class="keywordtype">void</span> <a class="code" href="group__lavu__mem.html#ga385b582522cedf5a88ce2cf158c396c9">av_dynarray_add</a>(<span class="keywordtype">void</span> *tab_ptr, <span class="keywordtype">int</span> *nb_ptr, <span class="keywordtype">void</span> *elem);</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">/**</span></div>
<div class="line"><a name="l00296"></a><span class="lineno"> 296</span> <span class="comment"> * Add an element to a dynamic array.</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"> * Function has the same functionality as av_dynarray_add(),</span></div>
<div class="line"><a name="l00299"></a><span class="lineno"> 299</span> <span class="comment"> * but it doesn't free memory on fails. It returns error code</span></div>
<div class="line"><a name="l00300"></a><span class="lineno"> 300</span> <span class="comment"> * instead and leave current buffer untouched.</span></div>
<div class="line"><a name="l00301"></a><span class="lineno"> 301</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00302"></a><span class="lineno"> 302</span> <span class="comment"> * @param tab_ptr pointer to the array to grow</span></div>
<div class="line"><a name="l00303"></a><span class="lineno"> 303</span> <span class="comment"> * @param nb_ptr pointer to the number of elements in the array</span></div>
<div class="line"><a name="l00304"></a><span class="lineno"> 304</span> <span class="comment"> * @param elem element to add</span></div>
<div class="line"><a name="l00305"></a><span class="lineno"> 305</span> <span class="comment"> * @return >=0 on success, negative otherwise.</span></div>
<div class="line"><a name="l00306"></a><span class="lineno"> 306</span> <span class="comment"> * @see av_dynarray_add(), av_dynarray2_add()</span></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> <a class="code" href="attributes_8h.html#a93f17e0f0b53a66e7b5eceb3dff2918f">av_warn_unused_result</a></div>
<div class="line"><a name="l00309"></a><span class="lineno"> 309</span> <span class="keywordtype">int</span> <a class="code" href="group__lavu__mem.html#ga5e3735b4568e78fffd7c4ea2f793996e">av_dynarray_add_nofree</a>(<span class="keywordtype">void</span> *tab_ptr, <span class="keywordtype">int</span> *nb_ptr, <span class="keywordtype">void</span> *elem);</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">/**</span></div>
<div class="line"><a name="l00312"></a><span class="lineno"> 312</span> <span class="comment"> * Add an element of size elem_size to a dynamic array.</span></div>
<div class="line"><a name="l00313"></a><span class="lineno"> 313</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00314"></a><span class="lineno"> 314</span> <span class="comment"> * The array is reallocated when its number of elements reaches powers of 2.</span></div>
<div class="line"><a name="l00315"></a><span class="lineno"> 315</span> <span class="comment"> * Therefore, the amortized cost of adding an element is constant.</span></div>
<div class="line"><a name="l00316"></a><span class="lineno"> 316</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00317"></a><span class="lineno"> 317</span> <span class="comment"> * In case of success, the pointer to the array is updated in order to</span></div>
<div class="line"><a name="l00318"></a><span class="lineno"> 318</span> <span class="comment"> * point to the new grown array, and the number pointed to by nb_ptr</span></div>
<div class="line"><a name="l00319"></a><span class="lineno"> 319</span> <span class="comment"> * is incremented.</span></div>
<div class="line"><a name="l00320"></a><span class="lineno"> 320</span> <span class="comment"> * In case of failure, the array is freed, *tab_ptr is set to NULL and</span></div>
<div class="line"><a name="l00321"></a><span class="lineno"> 321</span> <span class="comment"> * *nb_ptr is set to 0.</span></div>
<div class="line"><a name="l00322"></a><span class="lineno"> 322</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00323"></a><span class="lineno"> 323</span> <span class="comment"> * @param tab_ptr pointer to the array to grow</span></div>
<div class="line"><a name="l00324"></a><span class="lineno"> 324</span> <span class="comment"> * @param nb_ptr pointer to the number of elements in the array</span></div>
<div class="line"><a name="l00325"></a><span class="lineno"> 325</span> <span class="comment"> * @param elem_size size in bytes of the elements in the array</span></div>
<div class="line"><a name="l00326"></a><span class="lineno"> 326</span> <span class="comment"> * @param elem_data pointer to the data of the element to add. If NULL, the space of</span></div>
<div class="line"><a name="l00327"></a><span class="lineno"> 327</span> <span class="comment"> * the new added element is not filled.</span></div>
<div class="line"><a name="l00328"></a><span class="lineno"> 328</span> <span class="comment"> * @return pointer to the data of the element to copy in the new allocated space.</span></div>
<div class="line"><a name="l00329"></a><span class="lineno"> 329</span> <span class="comment"> * If NULL, the new allocated space is left uninitialized."</span></div>
<div class="line"><a name="l00330"></a><span class="lineno"> 330</span> <span class="comment"> * @see av_dynarray_add(), av_dynarray_add_nofree()</span></div>
<div class="line"><a name="l00331"></a><span class="lineno"> 331</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00332"></a><span class="lineno"> 332</span> <span class="keywordtype">void</span> *<a class="code" href="group__lavu__mem.html#ga9f60ff848186092d6705276a52ea0bb9">av_dynarray2_add</a>(<span class="keywordtype">void</span> **tab_ptr, <span class="keywordtype">int</span> *nb_ptr, <span class="keywordtype">size_t</span> elem_size,</div>
<div class="line"><a name="l00333"></a><span class="lineno"> 333</span>  <span class="keyword">const</span> uint8_t *elem_data);</div>
<div class="line"><a name="l00334"></a><span class="lineno"> 334</span> <span class="comment"></span></div>
<div class="line"><a name="l00335"></a><span class="lineno"> 335</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00336"></a><span class="lineno"> 336</span> <span class="comment"> * Multiply two size_t values checking for overflow.</span></div>
<div class="line"><a name="l00337"></a><span class="lineno"> 337</span> <span class="comment"> * @return 0 if success, AVERROR(EINVAL) if overflow.</span></div>
<div class="line"><a name="l00338"></a><span class="lineno"> 338</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00339"></a><span class="lineno"><a class="line" href="group__lavu__mem.html#ga368c719d3bdce4de169910a4158df66b"> 339</a></span> <span class="keyword">static</span> <span class="keyword">inline</span> <span class="keywordtype">int</span> <a class="code" href="group__lavu__mem.html#ga368c719d3bdce4de169910a4158df66b">av_size_mult</a>(<span class="keywordtype">size_t</span> a, <span class="keywordtype">size_t</span> b, <span class="keywordtype">size_t</span> *r)</div>
<div class="line"><a name="l00340"></a><span class="lineno"> 340</span> {</div>
<div class="line"><a name="l00341"></a><span class="lineno"> 341</span>  <span class="keywordtype">size_t</span> t = a * b;</div>
<div class="line"><a name="l00342"></a><span class="lineno"> 342</span>  <span class="comment">/* Hack inspired from glibc: only try the division if nelem and elsize</span></div>
<div class="line"><a name="l00343"></a><span class="lineno"> 343</span> <span class="comment"> * are both greater than sqrt(SIZE_MAX). */</span></div>
<div class="line"><a name="l00344"></a><span class="lineno"> 344</span>  <span class="keywordflow">if</span> ((a | b) >= ((<span class="keywordtype">size_t</span>)1 << (<span class="keyword">sizeof</span>(<span class="keywordtype">size_t</span>) * 4)) && a && t / a != b)</div>
<div class="line"><a name="l00345"></a><span class="lineno"> 345</span>  <span class="keywordflow">return</span> <a class="code" href="group__lavu__error.html#gae4bb6f165973d09584e0ec0f335f69ca">AVERROR</a>(EINVAL);</div>
<div class="line"><a name="l00346"></a><span class="lineno"> 346</span>  *r = t;</div>
<div class="line"><a name="l00347"></a><span class="lineno"> 347</span>  <span class="keywordflow">return</span> 0;</div>
<div class="line"><a name="l00348"></a><span class="lineno"> 348</span> }</div>
<div class="line"><a name="l00349"></a><span class="lineno"> 349</span> <span class="comment"></span></div>
<div class="line"><a name="l00350"></a><span class="lineno"> 350</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00351"></a><span class="lineno"> 351</span> <span class="comment"> * Set the maximum size that may me allocated in one block.</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="keywordtype">void</span> <a class="code" href="group__lavu__mem.html#ga2204fc859b4a3ca2d5bfd1bf4e8c4dfb">av_max_alloc</a>(<span class="keywordtype">size_t</span> max);</div>
<div class="line"><a name="l00354"></a><span class="lineno"> 354</span> <span class="comment"></span></div>
<div class="line"><a name="l00355"></a><span class="lineno"> 355</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00356"></a><span class="lineno"> 356</span> <span class="comment"> * deliberately overlapping memcpy implementation</span></div>
<div class="line"><a name="l00357"></a><span class="lineno"> 357</span> <span class="comment"> * @param dst destination buffer</span></div>
<div class="line"><a name="l00358"></a><span class="lineno"> 358</span> <span class="comment"> * @param back how many bytes back we start (the initial size of the overlapping window), must be > 0</span></div>
<div class="line"><a name="l00359"></a><span class="lineno"> 359</span> <span class="comment"> * @param cnt number of bytes to copy, must be >= 0</span></div>
<div class="line"><a name="l00360"></a><span class="lineno"> 360</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00361"></a><span class="lineno"> 361</span> <span class="comment"> * cnt > back is valid, this will copy the bytes we just copied,</span></div>
<div class="line"><a name="l00362"></a><span class="lineno"> 362</span> <span class="comment"> * thus creating a repeating pattern with a period length of back.</span></div>
<div class="line"><a name="l00363"></a><span class="lineno"> 363</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00364"></a><span class="lineno"> 364</span> <span class="keywordtype">void</span> <a class="code" href="group__lavu__mem.html#ga3ea4736dcceab4ba033b8abd2c2a180e">av_memcpy_backptr</a>(uint8_t *dst, <span class="keywordtype">int</span> back, <span class="keywordtype">int</span> cnt);</div>
<div class="line"><a name="l00365"></a><span class="lineno"> 365</span> <span class="comment"></span></div>
<div class="line"><a name="l00366"></a><span class="lineno"> 366</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00367"></a><span class="lineno"> 367</span> <span class="comment"> * Reallocate the given block if it is not large enough, otherwise do nothing.</span></div>
<div class="line"><a name="l00368"></a><span class="lineno"> 368</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00369"></a><span class="lineno"> 369</span> <span class="comment"> * @see av_realloc</span></div>
<div class="line"><a name="l00370"></a><span class="lineno"> 370</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00371"></a><span class="lineno"> 371</span> <span class="keywordtype">void</span> *<a class="code" href="group__lavu__mem.html#ga869fd8884d8d29a7a4910d879926d94a">av_fast_realloc</a>(<span class="keywordtype">void</span> *ptr, <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> *size, <span class="keywordtype">size_t</span> min_size);</div>
<div class="line"><a name="l00372"></a><span class="lineno"> 372</span> <span class="comment"></span></div>
<div class="line"><a name="l00373"></a><span class="lineno"> 373</span> <span class="comment">/**</span></div>
<div class="line"><a name="l00374"></a><span class="lineno"> 374</span> <span class="comment"> * Allocate a buffer, reusing the given one if large enough.</span></div>
<div class="line"><a name="l00375"></a><span class="lineno"> 375</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00376"></a><span class="lineno"> 376</span> <span class="comment"> * Contrary to av_fast_realloc the current buffer contents might not be</span></div>
<div class="line"><a name="l00377"></a><span class="lineno"> 377</span> <span class="comment"> * preserved and on error the old buffer is freed, thus no special</span></div>
<div class="line"><a name="l00378"></a><span class="lineno"> 378</span> <span class="comment"> * handling to avoid memleaks is necessary.</span></div>
<div class="line"><a name="l00379"></a><span class="lineno"> 379</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00380"></a><span class="lineno"> 380</span> <span class="comment"> * @param ptr pointer to pointer to already allocated buffer, overwritten with pointer to new buffer</span></div>
<div class="line"><a name="l00381"></a><span class="lineno"> 381</span> <span class="comment"> * @param size size of the buffer *ptr points to</span></div>
<div class="line"><a name="l00382"></a><span class="lineno"> 382</span> <span class="comment"> * @param min_size minimum size of *ptr buffer after returning, *ptr will be NULL and</span></div>
<div class="line"><a name="l00383"></a><span class="lineno"> 383</span> <span class="comment"> * *size 0 if an error occurred.</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="keywordtype">void</span> <a class="code" href="group__lavu__mem.html#ga29d0252b981f157e713a68ffca52f003">av_fast_malloc</a>(<span class="keywordtype">void</span> *ptr, <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> *size, <span class="keywordtype">size_t</span> min_size);</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">/**</span></div>
<div class="line"><a name="l00388"></a><span class="lineno"> 388</span> <span class="comment"> * Allocate a buffer, reusing the given one if large enough.</span></div>
<div class="line"><a name="l00389"></a><span class="lineno"> 389</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00390"></a><span class="lineno"> 390</span> <span class="comment"> * All newly allocated space is initially cleared</span></div>
<div class="line"><a name="l00391"></a><span class="lineno"> 391</span> <span class="comment"> * Contrary to av_fast_realloc the current buffer contents might not be</span></div>
<div class="line"><a name="l00392"></a><span class="lineno"> 392</span> <span class="comment"> * preserved and on error the old buffer is freed, thus no special</span></div>
<div class="line"><a name="l00393"></a><span class="lineno"> 393</span> <span class="comment"> * handling to avoid memleaks is necessary.</span></div>
<div class="line"><a name="l00394"></a><span class="lineno"> 394</span> <span class="comment"> *</span></div>
<div class="line"><a name="l00395"></a><span class="lineno"> 395</span> <span class="comment"> * @param ptr pointer to pointer to already allocated buffer, overwritten with pointer to new buffer</span></div>
<div class="line"><a name="l00396"></a><span class="lineno"> 396</span> <span class="comment"> * @param size size of the buffer *ptr points to</span></div>
<div class="line"><a name="l00397"></a><span class="lineno"> 397</span> <span class="comment"> * @param min_size minimum size of *ptr buffer after returning, *ptr will be NULL and</span></div>
<div class="line"><a name="l00398"></a><span class="lineno"> 398</span> <span class="comment"> * *size 0 if an error occurred.</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="keywordtype">void</span> <a class="code" href="group__lavu__mem.html#ga0bfda4adf7f9e943f9eb1a08eeda3791">av_fast_mallocz</a>(<span class="keywordtype">void</span> *ptr, <span class="keywordtype">unsigned</span> <span class="keywordtype">int</span> *size, <span class="keywordtype">size_t</span> min_size);</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">/**</span></div>
<div class="line"><a name="l00403"></a><span class="lineno"> 403</span> <span class="comment"> * @}</span></div>
<div class="line"><a name="l00404"></a><span class="lineno"> 404</span> <span class="comment"> */</span></div>
<div class="line"><a name="l00405"></a><span class="lineno"> 405</span> </div>
<div class="line"><a name="l00406"></a><span class="lineno"> 406</span> <span class="preprocessor">#endif </span><span class="comment">/* AVUTIL_MEM_H */</span><span class="preprocessor"></span></div>
<div class="ttc" id="group__lavu__mem_html_ga9722446c5e310ffedfaac9489864796d"><div class="ttname"><a href="group__lavu__mem.html#ga9722446c5e310ffedfaac9489864796d">av_malloc</a></div><div class="ttdeci">void * av_malloc(size_t size) av_malloc_attrib 1(1)</div><div class="ttdoc">Allocate a block of size bytes with alignment suitable for all memory accesses (including vectors if ...</div></div>
<div class="ttc" id="group__lavu__mem_html_gae5ca394e7536fcd2689008b011a211ad"><div class="ttname"><a href="group__lavu__mem.html#gae5ca394e7536fcd2689008b011a211ad">av_realloc_f</a></div><div class="ttdeci">void * av_realloc_f(void *ptr, size_t nelem, size_t elsize)</div><div class="ttdoc">Allocate or reallocate a block of memory. </div></div>
<div class="ttc" id="group__lavu__mem_html_ga9f60ff848186092d6705276a52ea0bb9"><div class="ttname"><a href="group__lavu__mem.html#ga9f60ff848186092d6705276a52ea0bb9">av_dynarray2_add</a></div><div class="ttdeci">void * av_dynarray2_add(void **tab_ptr, int *nb_ptr, size_t elem_size, const uint8_t *elem_data)</div><div class="ttdoc">Add an element of size elem_size to a dynamic array. </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__lavu__mem_html_ga2204fc859b4a3ca2d5bfd1bf4e8c4dfb"><div class="ttname"><a href="group__lavu__mem.html#ga2204fc859b4a3ca2d5bfd1bf4e8c4dfb">av_max_alloc</a></div><div class="ttdeci">void av_max_alloc(size_t max)</div><div class="ttdoc">Set the maximum size that may me allocated in one block. </div></div>
<div class="ttc" id="attributes_8h_html"><div class="ttname"><a href="attributes_8h.html">attributes.h</a></div><div class="ttdoc">Macro definitions for various function/variable attributes. </div></div>
<div class="ttc" id="group__lavu__mem_html_ga0cc84043ea2167ad005c86e11d0bcdba"><div class="ttname"><a href="group__lavu__mem.html#ga0cc84043ea2167ad005c86e11d0bcdba">av_freep</a></div><div class="ttdeci">void av_freep(void *ptr)</div><div class="ttdoc">Free a memory block which has been allocated with av_malloc(z)() or av_realloc() and set the pointer ...</div></div>
<div class="ttc" id="group__lavu__mem_html_ga0bfda4adf7f9e943f9eb1a08eeda3791"><div class="ttname"><a href="group__lavu__mem.html#ga0bfda4adf7f9e943f9eb1a08eeda3791">av_fast_mallocz</a></div><div class="ttdeci">void av_fast_mallocz(void *ptr, unsigned int *size, size_t min_size)</div><div class="ttdoc">Allocate a buffer, reusing the given one if large enough. </div></div>
<div class="ttc" id="group__lavu__mem_html_gad7ff928d462d1a61b37baa70bf13e0e3"><div class="ttname"><a href="group__lavu__mem.html#gad7ff928d462d1a61b37baa70bf13e0e3">av_alloc_size</a></div><div class="ttdeci">#define av_alloc_size(...)</div><div class="ttdef"><b>Definition:</b> <a href="mem_8h_source.html#l00070">mem.h:70</a></div></div>
<div class="ttc" id="group__lavu__mem_html_gaffde7a717e3a603ed11a998c18d68cad"><div class="ttname"><a href="group__lavu__mem.html#gaffde7a717e3a603ed11a998c18d68cad">av_strndup</a></div><div class="ttdeci">char * av_strndup(const char *s, size_t len) av_malloc_attrib</div><div class="ttdoc">Duplicate a substring of the string s. </div></div>
<div class="ttc" id="group__lavu__mem_html_gad8fde0c159ac905909339e082a049cde"><div class="ttname"><a href="group__lavu__mem.html#gad8fde0c159ac905909339e082a049cde">av_reallocp_array</a></div><div class="ttdeci">int av_reallocp_array(void *ptr, size_t nmemb, size_t size)</div></div>
<div class="ttc" id="group__lavu__mem_html_ga0c9096f498624c525aa2315b8a20c411"><div class="ttname"><a href="group__lavu__mem.html#ga0c9096f498624c525aa2315b8a20c411">av_free</a></div><div class="ttdeci">void av_free(void *ptr)</div><div class="ttdoc">Free a memory block which has been allocated with av_malloc(z)() or av_realloc(). ...</div></div>
<div class="ttc" id="error_8h_html"><div class="ttname"><a href="error_8h.html">error.h</a></div><div class="ttdoc">error code definitions </div></div>
<div class="ttc" id="group__lavu__mem_html_ga869fd8884d8d29a7a4910d879926d94a"><div class="ttname"><a href="group__lavu__mem.html#ga869fd8884d8d29a7a4910d879926d94a">av_fast_realloc</a></div><div class="ttdeci">void * av_fast_realloc(void *ptr, unsigned int *size, size_t min_size)</div><div class="ttdoc">Reallocate the given block if it is not large enough, otherwise do nothing. </div></div>
<div class="ttc" id="group__lavu__mem_html_ga5e3735b4568e78fffd7c4ea2f793996e"><div class="ttname"><a href="group__lavu__mem.html#ga5e3735b4568e78fffd7c4ea2f793996e">av_dynarray_add_nofree</a></div><div class="ttdeci">av_warn_unused_result int av_dynarray_add_nofree(void *tab_ptr, int *nb_ptr, void *elem)</div><div class="ttdoc">Add an element to a dynamic array. </div></div>
<div class="ttc" id="group__lavu__error_html_gae4bb6f165973d09584e0ec0f335f69ca"><div class="ttname"><a href="group__lavu__error.html#gae4bb6f165973d09584e0ec0f335f69ca">AVERROR</a></div><div class="ttdeci">#define AVERROR(e)</div><div class="ttdef"><b>Definition:</b> <a href="error_8h_source.html#l00043">error.h:43</a></div></div>
<div class="ttc" id="group__lavu__mem_html_ga385b582522cedf5a88ce2cf158c396c9"><div class="ttname"><a href="group__lavu__mem.html#ga385b582522cedf5a88ce2cf158c396c9">av_dynarray_add</a></div><div class="ttdeci">void av_dynarray_add(void *tab_ptr, int *nb_ptr, void *elem)</div><div class="ttdoc">Add an element to a dynamic array. </div></div>
<div class="ttc" id="group__lavu__mem_html_gad48ff724186ef4e602ae7a2547e4287c"><div class="ttname"><a href="group__lavu__mem.html#gad48ff724186ef4e602ae7a2547e4287c">av_malloc_attrib</a></div><div class="ttdeci">#define av_malloc_attrib</div><div class="ttdef"><b>Definition:</b> <a href="mem_8h_source.html#l00064">mem.h:64</a></div></div>
<div class="ttc" id="group__lavu__mem_html_ga368c719d3bdce4de169910a4158df66b"><div class="ttname"><a href="group__lavu__mem.html#ga368c719d3bdce4de169910a4158df66b">av_size_mult</a></div><div class="ttdeci">static int av_size_mult(size_t a, size_t b, size_t *r)</div><div class="ttdoc">Multiply two size_t values checking for overflow. </div><div class="ttdef"><b>Definition:</b> <a href="mem_8h_source.html#l00339">mem.h:339</a></div></div>
<div class="ttc" id="group__lavu__mem_html_ga4ad5e6363f4a6b6eddfdb427e21166f2"><div class="ttname"><a href="group__lavu__mem.html#ga4ad5e6363f4a6b6eddfdb427e21166f2">av_memdup</a></div><div class="ttdeci">void * av_memdup(const void *p, size_t size)</div><div class="ttdoc">Duplicate the buffer p. </div></div>
<div class="ttc" id="group__lavu__mem_html_ga7c352f4cff02184f005323691375fea9"><div class="ttname"><a href="group__lavu__mem.html#ga7c352f4cff02184f005323691375fea9">av_strdup</a></div><div class="ttdeci">char * av_strdup(const char *s) av_malloc_attrib</div><div class="ttdoc">Duplicate the string s. </div></div>
<div class="ttc" id="group__lavu__mem_html_gaaf38f6d994f5a85854ef47fd98fa6e9a"><div class="ttname"><a href="group__lavu__mem.html#gaaf38f6d994f5a85854ef47fd98fa6e9a">av_calloc</a></div><div class="ttdeci">void * av_calloc(size_t nmemb, size_t size) av_malloc_attrib</div><div class="ttdoc">Allocate a block of nmemb * size bytes with alignment suitable for all memory accesses (including vec...</div></div>
<div class="ttc" id="group__lavu__mem_html_gab62b093b46dce5fe4e3e1d58bdb255da"><div class="ttname"><a href="group__lavu__mem.html#gab62b093b46dce5fe4e3e1d58bdb255da">av_malloc_array</a></div><div class="ttdeci">static void * av_malloc_array(size_t nmemb, size_t size)</div><div class="ttdef"><b>Definition:</b> <a href="mem_8h_source.html#l00093">mem.h:93</a></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__mem_html_ga29d0252b981f157e713a68ffca52f003"><div class="ttname"><a href="group__lavu__mem.html#ga29d0252b981f157e713a68ffca52f003">av_fast_malloc</a></div><div class="ttdeci">void av_fast_malloc(void *ptr, unsigned int *size, size_t min_size)</div><div class="ttdoc">Allocate a buffer, reusing the given one if large enough. </div></div>
<div class="ttc" id="group__lavu__mem_html_ga675a8e3b2f7353329b79a3c55010d612"><div class="ttname"><a href="group__lavu__mem.html#ga675a8e3b2f7353329b79a3c55010d612">av_realloc</a></div><div class="ttdeci">void * av_realloc(void *ptr, size_t size) 1(2)</div><div class="ttdoc">Allocate or reallocate a block of memory. </div></div>
<div class="ttc" id="group__lavu__mem_html_ga9665abf3720f9f460790c2c3b224c052"><div class="ttname"><a href="group__lavu__mem.html#ga9665abf3720f9f460790c2c3b224c052">av_reallocp</a></div><div class="ttdeci">av_warn_unused_result int av_reallocp(void *ptr, size_t size)</div><div class="ttdoc">Allocate or reallocate a block of memory. </div></div>
<div class="ttc" id="group__lavu__mem_html_gaadc230ece36ef112710b262a6601a16b"><div class="ttname"><a href="group__lavu__mem.html#gaadc230ece36ef112710b262a6601a16b">av_realloc_array</a></div><div class="ttdeci">void * av_realloc_array(void *ptr, size_t nmemb, size_t size)</div></div>
<div class="ttc" id="group__lavu__mem_html_gae0443f550815c80af42c5ae967351433"><div class="ttname"><a href="group__lavu__mem.html#gae0443f550815c80af42c5ae967351433">av_mallocz_array</a></div><div class="ttdeci">static void * av_mallocz_array(size_t nmemb, size_t size)</div><div class="ttdef"><b>Definition:</b> <a href="mem_8h_source.html#l00229">mem.h:229</a></div></div>
<div class="ttc" id="group__lavu__mem_html_ga3ea4736dcceab4ba033b8abd2c2a180e"><div class="ttname"><a href="group__lavu__mem.html#ga3ea4736dcceab4ba033b8abd2c2a180e">av_memcpy_backptr</a></div><div class="ttdeci">void av_memcpy_backptr(uint8_t *dst, int back, int cnt)</div><div class="ttdoc">deliberately overlapping memcpy implementation </div></div>
<div class="ttc" id="group__lavu__mem_html_ga0a8cc057ae9723ce3b9203cb5365971a"><div class="ttname"><a href="group__lavu__mem.html#ga0a8cc057ae9723ce3b9203cb5365971a">av_mallocz</a></div><div class="ttdeci">void * av_mallocz(size_t size) av_malloc_attrib 1(1)</div><div class="ttdoc">Allocate a block of size bytes with alignment suitable for all memory accesses (including vectors if ...</div></div>
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