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 <span id="projectnumber">3.0.2</span>
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<div class="title">bswap.h</div> </div>
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<a href="bswap_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"> * byte swapping routines</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_BSWAP_H</span></div>
<div class="line"><a name="l00027"></a><span class="lineno"> 27</span> <span class="preprocessor"></span><span class="preprocessor">#define AVUTIL_BSWAP_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 <stdint.h></span></div>
<div class="line"><a name="l00030"></a><span class="lineno"> 30</span> <span class="preprocessor">#include "libavutil/avconfig.h"</span></div>
<div class="line"><a name="l00031"></a><span class="lineno"> 31</span> <span class="preprocessor">#include "<a class="code" href="attributes_8h.html">attributes.h</a>"</span></div>
<div class="line"><a name="l00032"></a><span class="lineno"> 32</span> </div>
<div class="line"><a name="l00033"></a><span class="lineno"> 33</span> <span class="preprocessor">#ifdef HAVE_AV_CONFIG_H</span></div>
<div class="line"><a name="l00034"></a><span class="lineno"> 34</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00035"></a><span class="lineno"> 35</span> <span class="preprocessor">#include "config.h"</span></div>
<div class="line"><a name="l00036"></a><span class="lineno"> 36</span> </div>
<div class="line"><a name="l00037"></a><span class="lineno"> 37</span> <span class="preprocessor">#if ARCH_AARCH64</span></div>
<div class="line"><a name="l00038"></a><span class="lineno"> 38</span> <span class="preprocessor"></span><span class="preprocessor"># include "aarch64/bswap.h"</span></div>
<div class="line"><a name="l00039"></a><span class="lineno"> 39</span> <span class="preprocessor">#elif ARCH_ARM</span></div>
<div class="line"><a name="l00040"></a><span class="lineno"> 40</span> <span class="preprocessor"></span><span class="preprocessor"># include "arm/bswap.h"</span></div>
<div class="line"><a name="l00041"></a><span class="lineno"> 41</span> <span class="preprocessor">#elif ARCH_AVR32</span></div>
<div class="line"><a name="l00042"></a><span class="lineno"> 42</span> <span class="preprocessor"></span><span class="preprocessor"># include "avr32/bswap.h"</span></div>
<div class="line"><a name="l00043"></a><span class="lineno"> 43</span> <span class="preprocessor">#elif ARCH_SH4</span></div>
<div class="line"><a name="l00044"></a><span class="lineno"> 44</span> <span class="preprocessor"></span><span class="preprocessor"># include "sh4/bswap.h"</span></div>
<div class="line"><a name="l00045"></a><span class="lineno"> 45</span> <span class="preprocessor">#elif ARCH_X86</span></div>
<div class="line"><a name="l00046"></a><span class="lineno"> 46</span> <span class="preprocessor"></span><span class="preprocessor"># include "x86/bswap.h"</span></div>
<div class="line"><a name="l00047"></a><span class="lineno"> 47</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00048"></a><span class="lineno"> 48</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00049"></a><span class="lineno"> 49</span> <span class="preprocessor">#endif </span><span class="comment">/* HAVE_AV_CONFIG_H */</span><span class="preprocessor"></span></div>
<div class="line"><a name="l00050"></a><span class="lineno"> 50</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00051"></a><span class="lineno"><a class="line" href="bswap_8h.html#ae814c79414a68cd818fa85b537e512ca"> 51</a></span> <span class="preprocessor">#define AV_BSWAP16C(x) (((x) << 8 & 0xff00) | ((x) >> 8 & 0x00ff))</span></div>
<div class="line"><a name="l00052"></a><span class="lineno"><a class="line" href="bswap_8h.html#acd0be1ea0d53f0e778ba453d6a8a2ba7"> 52</a></span> <span class="preprocessor"></span><span class="preprocessor">#define AV_BSWAP32C(x) (AV_BSWAP16C(x) << 16 | AV_BSWAP16C((x) >> 16))</span></div>
<div class="line"><a name="l00053"></a><span class="lineno"><a class="line" href="bswap_8h.html#a0231c6b30e9577aa7866e96bd6b14d1d"> 53</a></span> <span class="preprocessor"></span><span class="preprocessor">#define AV_BSWAP64C(x) (AV_BSWAP32C(x) << 32 | AV_BSWAP32C((x) >> 32))</span></div>
<div class="line"><a name="l00054"></a><span class="lineno"> 54</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00055"></a><span class="lineno"><a class="line" href="bswap_8h.html#a4e7a1254648283f96e02ff832c42b0d1"> 55</a></span> <span class="preprocessor">#define AV_BSWAPC(s, x) AV_BSWAP##s##C(x)</span></div>
<div class="line"><a name="l00056"></a><span class="lineno"> 56</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00057"></a><span class="lineno"> 57</span> <span class="preprocessor">#ifndef av_bswap16</span></div>
<div class="line"><a name="l00058"></a><span class="lineno"><a class="line" href="bswap_8h.html#acd93aba4dbc490bca8ed9057f6816b5a"> 58</a></span> <span class="preprocessor"></span><span class="keyword">static</span> <a class="code" href="attributes_8h.html#a28f50f4c125959216885f01d56dbe866">av_always_inline</a> <a class="code" href="attributes_8h.html#a9eaead3cde73464fd66bab4cef9307ad">av_const</a> uint16_t <a class="code" href="bswap_8h.html#acd93aba4dbc490bca8ed9057f6816b5a">av_bswap16</a>(uint16_t x)</div>
<div class="line"><a name="l00059"></a><span class="lineno"> 59</span> {</div>
<div class="line"><a name="l00060"></a><span class="lineno"> 60</span>  x= (x>>8) | (x<<8);</div>
<div class="line"><a name="l00061"></a><span class="lineno"> 61</span>  <span class="keywordflow">return</span> x;</div>
<div class="line"><a name="l00062"></a><span class="lineno"> 62</span> }</div>
<div class="line"><a name="l00063"></a><span class="lineno"> 63</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00064"></a><span class="lineno"> 64</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00065"></a><span class="lineno"> 65</span> <span class="preprocessor">#ifndef av_bswap32</span></div>
<div class="line"><a name="l00066"></a><span class="lineno"><a class="line" href="bswap_8h.html#af620b9064c4d86e0c80c63de965678ae"> 66</a></span> <span class="preprocessor"></span><span class="keyword">static</span> <a class="code" href="attributes_8h.html#a28f50f4c125959216885f01d56dbe866">av_always_inline</a> <a class="code" href="attributes_8h.html#a9eaead3cde73464fd66bab4cef9307ad">av_const</a> uint32_t <a class="code" href="bswap_8h.html#af620b9064c4d86e0c80c63de965678ae">av_bswap32</a>(uint32_t x)</div>
<div class="line"><a name="l00067"></a><span class="lineno"> 67</span> {</div>
<div class="line"><a name="l00068"></a><span class="lineno"> 68</span>  <span class="keywordflow">return</span> <a class="code" href="bswap_8h.html#acd0be1ea0d53f0e778ba453d6a8a2ba7">AV_BSWAP32C</a>(x);</div>
<div class="line"><a name="l00069"></a><span class="lineno"> 69</span> }</div>
<div class="line"><a name="l00070"></a><span class="lineno"> 70</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00071"></a><span class="lineno"> 71</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00072"></a><span class="lineno"> 72</span> <span class="preprocessor">#ifndef av_bswap64</span></div>
<div class="line"><a name="l00073"></a><span class="lineno"><a class="line" href="bswap_8h.html#a2fb2d4d0f205a1897de581749d8774dc"> 73</a></span> <span class="preprocessor"></span><span class="keyword">static</span> <span class="keyword">inline</span> uint64_t <a class="code" href="attributes_8h.html#a9eaead3cde73464fd66bab4cef9307ad">av_const</a> <a class="code" href="bswap_8h.html#a2fb2d4d0f205a1897de581749d8774dc">av_bswap64</a>(uint64_t x)</div>
<div class="line"><a name="l00074"></a><span class="lineno"> 74</span> {</div>
<div class="line"><a name="l00075"></a><span class="lineno"> 75</span>  <span class="keywordflow">return</span> (uint64_t)<a class="code" href="bswap_8h.html#af620b9064c4d86e0c80c63de965678ae">av_bswap32</a>(x) << 32 | <a class="code" href="bswap_8h.html#af620b9064c4d86e0c80c63de965678ae">av_bswap32</a>(x >> 32);</div>
<div class="line"><a name="l00076"></a><span class="lineno"> 76</span> }</div>
<div class="line"><a name="l00077"></a><span class="lineno"> 77</span> <span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00078"></a><span class="lineno"> 78</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00079"></a><span class="lineno"> 79</span> <span class="comment">// be2ne ... big-endian to native-endian</span></div>
<div class="line"><a name="l00080"></a><span class="lineno"> 80</span> <span class="comment">// le2ne ... little-endian to native-endian</span></div>
<div class="line"><a name="l00081"></a><span class="lineno"> 81</span> </div>
<div class="line"><a name="l00082"></a><span class="lineno"> 82</span> <span class="preprocessor">#if AV_HAVE_BIGENDIAN</span></div>
<div class="line"><a name="l00083"></a><span class="lineno"> 83</span> <span class="preprocessor"></span><span class="preprocessor">#define av_be2ne16(x) (x)</span></div>
<div class="line"><a name="l00084"></a><span class="lineno"> 84</span> <span class="preprocessor"></span><span class="preprocessor">#define av_be2ne32(x) (x)</span></div>
<div class="line"><a name="l00085"></a><span class="lineno"> 85</span> <span class="preprocessor"></span><span class="preprocessor">#define av_be2ne64(x) (x)</span></div>
<div class="line"><a name="l00086"></a><span class="lineno"> 86</span> <span class="preprocessor"></span><span class="preprocessor">#define av_le2ne16(x) av_bswap16(x)</span></div>
<div class="line"><a name="l00087"></a><span class="lineno"> 87</span> <span class="preprocessor"></span><span class="preprocessor">#define av_le2ne32(x) av_bswap32(x)</span></div>
<div class="line"><a name="l00088"></a><span class="lineno"> 88</span> <span class="preprocessor"></span><span class="preprocessor">#define av_le2ne64(x) av_bswap64(x)</span></div>
<div class="line"><a name="l00089"></a><span class="lineno"> 89</span> <span class="preprocessor"></span><span class="preprocessor">#define AV_BE2NEC(s, x) (x)</span></div>
<div class="line"><a name="l00090"></a><span class="lineno"> 90</span> <span class="preprocessor"></span><span class="preprocessor">#define AV_LE2NEC(s, x) AV_BSWAPC(s, x)</span></div>
<div class="line"><a name="l00091"></a><span class="lineno"> 91</span> <span class="preprocessor"></span><span class="preprocessor">#else</span></div>
<div class="line"><a name="l00092"></a><span class="lineno"><a class="line" href="bswap_8h.html#a02385306e193ec58dc379dfb5d812960"> 92</a></span> <span class="preprocessor"></span><span class="preprocessor">#define av_be2ne16(x) av_bswap16(x)</span></div>
<div class="line"><a name="l00093"></a><span class="lineno"><a class="line" href="bswap_8h.html#ac1015f36993fc9b1659fe883d3ff3a17"> 93</a></span> <span class="preprocessor"></span><span class="preprocessor">#define av_be2ne32(x) av_bswap32(x)</span></div>
<div class="line"><a name="l00094"></a><span class="lineno"><a class="line" href="bswap_8h.html#a4b21613df6f82952b52f4f0d1fc7b33c"> 94</a></span> <span class="preprocessor"></span><span class="preprocessor">#define av_be2ne64(x) av_bswap64(x)</span></div>
<div class="line"><a name="l00095"></a><span class="lineno"><a class="line" href="bswap_8h.html#a7b43061d66dbb292123e683e37cecab8"> 95</a></span> <span class="preprocessor"></span><span class="preprocessor">#define av_le2ne16(x) (x)</span></div>
<div class="line"><a name="l00096"></a><span class="lineno"><a class="line" href="bswap_8h.html#a610c453f4731b545a1528ffdddccd349"> 96</a></span> <span class="preprocessor"></span><span class="preprocessor">#define av_le2ne32(x) (x)</span></div>
<div class="line"><a name="l00097"></a><span class="lineno"><a class="line" href="bswap_8h.html#a3aa241ad1a5d44df2e550976ffd38dc2"> 97</a></span> <span class="preprocessor"></span><span class="preprocessor">#define av_le2ne64(x) (x)</span></div>
<div class="line"><a name="l00098"></a><span class="lineno"><a class="line" href="bswap_8h.html#a462118c252ac8d6acde1676cd711bbda"> 98</a></span> <span class="preprocessor"></span><span class="preprocessor">#define AV_BE2NEC(s, x) AV_BSWAPC(s, x)</span></div>
<div class="line"><a name="l00099"></a><span class="lineno"><a class="line" href="bswap_8h.html#a5797b32cfd8cbdadd82c51fdc4c933b8"> 99</a></span> <span class="preprocessor"></span><span class="preprocessor">#define AV_LE2NEC(s, x) (x)</span></div>
<div class="line"><a name="l00100"></a><span class="lineno"> 100</span> <span class="preprocessor"></span><span class="preprocessor">#endif</span></div>
<div class="line"><a name="l00101"></a><span class="lineno"> 101</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00102"></a><span class="lineno"><a class="line" href="bswap_8h.html#ac35c610c96f7e07cf3d983884559eede"> 102</a></span> <span class="preprocessor">#define AV_BE2NE16C(x) AV_BE2NEC(16, x)</span></div>
<div class="line"><a name="l00103"></a><span class="lineno"><a class="line" href="bswap_8h.html#abd6a1094eb78b29cb4aba793ffa7ce00"> 103</a></span> <span class="preprocessor"></span><span class="preprocessor">#define AV_BE2NE32C(x) AV_BE2NEC(32, x)</span></div>
<div class="line"><a name="l00104"></a><span class="lineno"><a class="line" href="bswap_8h.html#a33520e694e7cb3d62ac95a7120231d4e"> 104</a></span> <span class="preprocessor"></span><span class="preprocessor">#define AV_BE2NE64C(x) AV_BE2NEC(64, x)</span></div>
<div class="line"><a name="l00105"></a><span class="lineno"><a class="line" href="bswap_8h.html#ac59ea1c37c5bc191f526b2afa97e2db2"> 105</a></span> <span class="preprocessor"></span><span class="preprocessor">#define AV_LE2NE16C(x) AV_LE2NEC(16, x)</span></div>
<div class="line"><a name="l00106"></a><span class="lineno"><a class="line" href="bswap_8h.html#ab508468ff8b273b8ed5c23ef214ee8dc"> 106</a></span> <span class="preprocessor"></span><span class="preprocessor">#define AV_LE2NE32C(x) AV_LE2NEC(32, x)</span></div>
<div class="line"><a name="l00107"></a><span class="lineno"><a class="line" href="bswap_8h.html#aac38fbe0d7a17950224f153df82ccda4"> 107</a></span> <span class="preprocessor"></span><span class="preprocessor">#define AV_LE2NE64C(x) AV_LE2NEC(64, x)</span></div>
<div class="line"><a name="l00108"></a><span class="lineno"> 108</span> <span class="preprocessor"></span></div>
<div class="line"><a name="l00109"></a><span class="lineno"> 109</span> <span class="preprocessor">#endif </span><span class="comment">/* AVUTIL_BSWAP_H */</span><span class="preprocessor"></span></div>
<div class="ttc" id="attributes_8h_html_a9eaead3cde73464fd66bab4cef9307ad"><div class="ttname"><a href="attributes_8h.html#a9eaead3cde73464fd66bab4cef9307ad">av_const</a></div><div class="ttdeci">#define av_const</div><div class="ttdef"><b>Definition:</b> <a href="attributes_8h_source.html#l00076">attributes.h:76</a></div></div>
<div class="ttc" id="bswap_8h_html_af620b9064c4d86e0c80c63de965678ae"><div class="ttname"><a href="bswap_8h.html#af620b9064c4d86e0c80c63de965678ae">av_bswap32</a></div><div class="ttdeci">static av_always_inline av_const uint32_t av_bswap32(uint32_t x)</div><div class="ttdef"><b>Definition:</b> <a href="bswap_8h_source.html#l00066">bswap.h:66</a></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="bswap_8h_html_acd0be1ea0d53f0e778ba453d6a8a2ba7"><div class="ttname"><a href="bswap_8h.html#acd0be1ea0d53f0e778ba453d6a8a2ba7">AV_BSWAP32C</a></div><div class="ttdeci">#define AV_BSWAP32C(x)</div><div class="ttdef"><b>Definition:</b> <a href="bswap_8h_source.html#l00052">bswap.h:52</a></div></div>
<div class="ttc" id="bswap_8h_html_a2fb2d4d0f205a1897de581749d8774dc"><div class="ttname"><a href="bswap_8h.html#a2fb2d4d0f205a1897de581749d8774dc">av_bswap64</a></div><div class="ttdeci">static uint64_t av_const av_bswap64(uint64_t x)</div><div class="ttdef"><b>Definition:</b> <a href="bswap_8h_source.html#l00073">bswap.h:73</a></div></div>
<div class="ttc" id="bswap_8h_html_acd93aba4dbc490bca8ed9057f6816b5a"><div class="ttname"><a href="bswap_8h.html#acd93aba4dbc490bca8ed9057f6816b5a">av_bswap16</a></div><div class="ttdeci">static av_always_inline av_const uint16_t av_bswap16(uint16_t x)</div><div class="ttdef"><b>Definition:</b> <a href="bswap_8h_source.html#l00058">bswap.h:58</a></div></div>
<div class="ttc" id="attributes_8h_html_a28f50f4c125959216885f01d56dbe866"><div class="ttname"><a href="attributes_8h.html#a28f50f4c125959216885f01d56dbe866">av_always_inline</a></div><div class="ttdeci">#define av_always_inline</div><div class="ttdef"><b>Definition:</b> <a href="attributes_8h_source.html#l00039">attributes.h:39</a></div></div>
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