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<a href="avdct_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>&#160;<span class="comment">/*</span></div>
<div class="line"><a name="l00002"></a><span class="lineno">    2</span>&#160;<span class="comment"> * This file is part of FFmpeg.</span></div>
<div class="line"><a name="l00003"></a><span class="lineno">    3</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00004"></a><span class="lineno">    4</span>&#160;<span class="comment"> * FFmpeg is free software; you can redistribute it and/or</span></div>
<div class="line"><a name="l00005"></a><span class="lineno">    5</span>&#160;<span class="comment"> * modify it under the terms of the GNU Lesser General Public</span></div>
<div class="line"><a name="l00006"></a><span class="lineno">    6</span>&#160;<span class="comment"> * License as published by the Free Software Foundation; either</span></div>
<div class="line"><a name="l00007"></a><span class="lineno">    7</span>&#160;<span class="comment"> * version 2.1 of the License, or (at your option) any later version.</span></div>
<div class="line"><a name="l00008"></a><span class="lineno">    8</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00009"></a><span class="lineno">    9</span>&#160;<span class="comment"> * FFmpeg is distributed in the hope that it will be useful,</span></div>
<div class="line"><a name="l00010"></a><span class="lineno">   10</span>&#160;<span class="comment"> * but WITHOUT ANY WARRANTY; without even the implied warranty of</span></div>
<div class="line"><a name="l00011"></a><span class="lineno">   11</span>&#160;<span class="comment"> * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU</span></div>
<div class="line"><a name="l00012"></a><span class="lineno">   12</span>&#160;<span class="comment"> * Lesser General Public License for more details.</span></div>
<div class="line"><a name="l00013"></a><span class="lineno">   13</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00014"></a><span class="lineno">   14</span>&#160;<span class="comment"> * You should have received a copy of the GNU Lesser General Public</span></div>
<div class="line"><a name="l00015"></a><span class="lineno">   15</span>&#160;<span class="comment"> * License along with FFmpeg; if not, write to the Free Software</span></div>
<div class="line"><a name="l00016"></a><span class="lineno">   16</span>&#160;<span class="comment"> * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA</span></div>
<div class="line"><a name="l00017"></a><span class="lineno">   17</span>&#160;<span class="comment"> */</span></div>
<div class="line"><a name="l00018"></a><span class="lineno">   18</span>&#160;</div>
<div class="line"><a name="l00019"></a><span class="lineno">   19</span>&#160;<span class="preprocessor">#ifndef AVCODEC_AVDCT_H</span></div>
<div class="line"><a name="l00020"></a><span class="lineno">   20</span>&#160;<span class="preprocessor"></span><span class="preprocessor">#define AVCODEC_AVDCT_H</span></div>
<div class="line"><a name="l00021"></a><span class="lineno">   21</span>&#160;<span class="preprocessor"></span></div>
<div class="line"><a name="l00022"></a><span class="lineno">   22</span>&#160;<span class="preprocessor">#include &quot;<a class="code" href="opt_8h.html">libavutil/opt.h</a>&quot;</span></div>
<div class="line"><a name="l00023"></a><span class="lineno">   23</span>&#160;<span class="comment"></span></div>
<div class="line"><a name="l00024"></a><span class="lineno">   24</span>&#160;<span class="comment">/**</span></div>
<div class="line"><a name="l00025"></a><span class="lineno">   25</span>&#160;<span class="comment"> * AVDCT context.</span></div>
<div class="line"><a name="l00026"></a><span class="lineno">   26</span>&#160;<span class="comment"> * @note function pointers can be NULL if the specific features have been</span></div>
<div class="line"><a name="l00027"></a><span class="lineno">   27</span>&#160;<span class="comment"> *       disabled at build time.</span></div>
<div class="line"><a name="l00028"></a><span class="lineno">   28</span>&#160;<span class="comment"> */</span></div>
<div class="line"><a name="l00029"></a><span class="lineno"><a class="line" href="structAVDCT.html">   29</a></span>&#160;<span class="keyword">typedef</span> <span class="keyword">struct </span><a class="code" href="structAVDCT.html">AVDCT</a> {</div>
<div class="line"><a name="l00030"></a><span class="lineno"><a class="line" href="structAVDCT.html#a9cf1dfc2c85db6bf753182259116cba1">   30</a></span>&#160;    <span class="keyword">const</span> <a class="code" href="structAVClass.html">AVClass</a> *<a class="code" href="structAVDCT.html#a9cf1dfc2c85db6bf753182259116cba1">av_class</a>;</div>
<div class="line"><a name="l00031"></a><span class="lineno">   31</span>&#160;</div>
<div class="line"><a name="l00032"></a><span class="lineno"><a class="line" href="structAVDCT.html#a06e927ba17a353815e5898e0ca990a1c">   32</a></span>&#160;    void (*<a class="code" href="structAVDCT.html#a06e927ba17a353815e5898e0ca990a1c">idct</a>)(int16_t *block <span class="comment">/* align 16 */</span>);</div>
<div class="line"><a name="l00033"></a><span class="lineno">   33</span>&#160;<span class="comment"></span></div>
<div class="line"><a name="l00034"></a><span class="lineno">   34</span>&#160;<span class="comment">    /**</span></div>
<div class="line"><a name="l00035"></a><span class="lineno">   35</span>&#160;<span class="comment">     * IDCT input permutation.</span></div>
<div class="line"><a name="l00036"></a><span class="lineno">   36</span>&#160;<span class="comment">     * Several optimized IDCTs need a permutated input (relative to the</span></div>
<div class="line"><a name="l00037"></a><span class="lineno">   37</span>&#160;<span class="comment">     * normal order of the reference IDCT).</span></div>
<div class="line"><a name="l00038"></a><span class="lineno">   38</span>&#160;<span class="comment">     * This permutation must be performed before the idct_put/add.</span></div>
<div class="line"><a name="l00039"></a><span class="lineno">   39</span>&#160;<span class="comment">     * Note, normally this can be merged with the zigzag/alternate scan&lt;br&gt;</span></div>
<div class="line"><a name="l00040"></a><span class="lineno">   40</span>&#160;<span class="comment">     * An example to avoid confusion:</span></div>
<div class="line"><a name="l00041"></a><span class="lineno">   41</span>&#160;<span class="comment">     * - (-&gt;decode coeffs -&gt; zigzag reorder -&gt; dequant -&gt; reference IDCT -&gt; ...)</span></div>
<div class="line"><a name="l00042"></a><span class="lineno">   42</span>&#160;<span class="comment">     * - (x -&gt; reference DCT -&gt; reference IDCT -&gt; x)</span></div>
<div class="line"><a name="l00043"></a><span class="lineno">   43</span>&#160;<span class="comment">     * - (x -&gt; reference DCT -&gt; simple_mmx_perm = idct_permutation</span></div>
<div class="line"><a name="l00044"></a><span class="lineno">   44</span>&#160;<span class="comment">     *    -&gt; simple_idct_mmx -&gt; x)</span></div>
<div class="line"><a name="l00045"></a><span class="lineno">   45</span>&#160;<span class="comment">     * - (-&gt; decode coeffs -&gt; zigzag reorder -&gt; simple_mmx_perm -&gt; dequant</span></div>
<div class="line"><a name="l00046"></a><span class="lineno">   46</span>&#160;<span class="comment">     *    -&gt; simple_idct_mmx -&gt; ...)</span></div>
<div class="line"><a name="l00047"></a><span class="lineno">   47</span>&#160;<span class="comment">     */</span></div>
<div class="line"><a name="l00048"></a><span class="lineno"><a class="line" href="structAVDCT.html#a0ec74ead791a02aa244ade41f1200f1e">   48</a></span>&#160;    uint8_t <a class="code" href="structAVDCT.html#a0ec74ead791a02aa244ade41f1200f1e">idct_permutation</a>[64];</div>
<div class="line"><a name="l00049"></a><span class="lineno">   49</span>&#160;</div>
<div class="line"><a name="l00050"></a><span class="lineno"><a class="line" href="structAVDCT.html#aa40a480d0e5f91fc4399914971642579">   50</a></span>&#160;    void (*<a class="code" href="structAVDCT.html#aa40a480d0e5f91fc4399914971642579">fdct</a>)(int16_t *block <span class="comment">/* align 16 */</span>);</div>
<div class="line"><a name="l00051"></a><span class="lineno">   51</span>&#160;</div>
<div class="line"><a name="l00052"></a><span class="lineno">   52</span>&#160;<span class="comment"></span></div>
<div class="line"><a name="l00053"></a><span class="lineno">   53</span>&#160;<span class="comment">    /**</span></div>
<div class="line"><a name="l00054"></a><span class="lineno">   54</span>&#160;<span class="comment">     * DCT algorithm.</span></div>
<div class="line"><a name="l00055"></a><span class="lineno">   55</span>&#160;<span class="comment">     * must use AVOptions to set this field.</span></div>
<div class="line"><a name="l00056"></a><span class="lineno">   56</span>&#160;<span class="comment">     */</span></div>
<div class="line"><a name="l00057"></a><span class="lineno"><a class="line" href="structAVDCT.html#afafee61c2c4c3cafd7a1433de9677be5">   57</a></span>&#160;    <span class="keywordtype">int</span> <a class="code" href="structAVDCT.html#afafee61c2c4c3cafd7a1433de9677be5">dct_algo</a>;</div>
<div class="line"><a name="l00058"></a><span class="lineno">   58</span>&#160;<span class="comment"></span></div>
<div class="line"><a name="l00059"></a><span class="lineno">   59</span>&#160;<span class="comment">    /**</span></div>
<div class="line"><a name="l00060"></a><span class="lineno">   60</span>&#160;<span class="comment">     * IDCT algorithm.</span></div>
<div class="line"><a name="l00061"></a><span class="lineno">   61</span>&#160;<span class="comment">     * must use AVOptions to set this field.</span></div>
<div class="line"><a name="l00062"></a><span class="lineno">   62</span>&#160;<span class="comment">     */</span></div>
<div class="line"><a name="l00063"></a><span class="lineno"><a class="line" href="structAVDCT.html#aed94b220afff7a9cec826c6347d7e859">   63</a></span>&#160;    <span class="keywordtype">int</span> <a class="code" href="structAVDCT.html#aed94b220afff7a9cec826c6347d7e859">idct_algo</a>;</div>
<div class="line"><a name="l00064"></a><span class="lineno">   64</span>&#160;</div>
<div class="line"><a name="l00065"></a><span class="lineno"><a class="line" href="structAVDCT.html#a09d578a99e0372994d8051d88c7c6454">   65</a></span>&#160;    void (*<a class="code" href="structAVDCT.html#a09d578a99e0372994d8051d88c7c6454">get_pixels</a>)(int16_t *block <span class="comment">/* align 16 */</span>,</div>
<div class="line"><a name="l00066"></a><span class="lineno">   66</span>&#160;                       <span class="keyword">const</span> uint8_t *pixels <span class="comment">/* align 8 */</span>,</div>
<div class="line"><a name="l00067"></a><span class="lineno">   67</span>&#160;                       ptrdiff_t line_size);</div>
<div class="line"><a name="l00068"></a><span class="lineno">   68</span>&#160;</div>
<div class="line"><a name="l00069"></a><span class="lineno"><a class="line" href="structAVDCT.html#aa81e0ecf9185352726fa6b5ab5bbcabf">   69</a></span>&#160;    <span class="keywordtype">int</span> <a class="code" href="structAVDCT.html#aa81e0ecf9185352726fa6b5ab5bbcabf">bits_per_sample</a>;</div>
<div class="line"><a name="l00070"></a><span class="lineno">   70</span>&#160;} <a class="code" href="structAVDCT.html">AVDCT</a>;</div>
<div class="line"><a name="l00071"></a><span class="lineno">   71</span>&#160;<span class="comment"></span></div>
<div class="line"><a name="l00072"></a><span class="lineno">   72</span>&#160;<span class="comment">/**</span></div>
<div class="line"><a name="l00073"></a><span class="lineno">   73</span>&#160;<span class="comment"> * Allocates a AVDCT context.</span></div>
<div class="line"><a name="l00074"></a><span class="lineno">   74</span>&#160;<span class="comment"> * This needs to be initialized with avcodec_dct_init() after optionally</span></div>
<div class="line"><a name="l00075"></a><span class="lineno">   75</span>&#160;<span class="comment"> * configuring it with AVOptions.</span></div>
<div class="line"><a name="l00076"></a><span class="lineno">   76</span>&#160;<span class="comment"> *</span></div>
<div class="line"><a name="l00077"></a><span class="lineno">   77</span>&#160;<span class="comment"> * To free it use av_free()</span></div>
<div class="line"><a name="l00078"></a><span class="lineno">   78</span>&#160;<span class="comment"> */</span></div>
<div class="line"><a name="l00079"></a><span class="lineno">   79</span>&#160;<a class="code" href="structAVDCT.html">AVDCT</a> *<a class="code" href="avdct_8h.html#ab28e945b5dff30434bf0b7714e3e5011">avcodec_dct_alloc</a>(<span class="keywordtype">void</span>);</div>
<div class="line"><a name="l00080"></a><span class="lineno">   80</span>&#160;<span class="keywordtype">int</span> <a class="code" href="avdct_8h.html#a4d987ad7fd4893904dfec30087b1a972">avcodec_dct_init</a>(<a class="code" href="structAVDCT.html">AVDCT</a> *);</div>
<div class="line"><a name="l00081"></a><span class="lineno">   81</span>&#160;</div>
<div class="line"><a name="l00082"></a><span class="lineno">   82</span>&#160;<span class="keyword">const</span> <a class="code" href="structAVClass.html">AVClass</a> *<a class="code" href="avdct_8h.html#ac29f05758eb8f782c2344f2024387dfc">avcodec_dct_get_class</a>(<span class="keywordtype">void</span>);</div>
<div class="line"><a name="l00083"></a><span class="lineno">   83</span>&#160;</div>
<div class="line"><a name="l00084"></a><span class="lineno">   84</span>&#160;<span class="preprocessor">#endif </span><span class="comment">/* AVCODEC_AVDCT_H */</span><span class="preprocessor"></span></div>
<div class="ttc" id="opt_8h_html"><div class="ttname"><a href="opt_8h.html">opt.h</a></div><div class="ttdoc">AVOptions. </div></div>
<div class="ttc" id="avdct_8h_html_ab28e945b5dff30434bf0b7714e3e5011"><div class="ttname"><a href="avdct_8h.html#ab28e945b5dff30434bf0b7714e3e5011">avcodec_dct_alloc</a></div><div class="ttdeci">AVDCT * avcodec_dct_alloc(void)</div><div class="ttdoc">Allocates a AVDCT context. </div></div>
<div class="ttc" id="avdct_8h_html_ac29f05758eb8f782c2344f2024387dfc"><div class="ttname"><a href="avdct_8h.html#ac29f05758eb8f782c2344f2024387dfc">avcodec_dct_get_class</a></div><div class="ttdeci">const AVClass * avcodec_dct_get_class(void)</div></div>
<div class="ttc" id="structAVDCT_html_a0ec74ead791a02aa244ade41f1200f1e"><div class="ttname"><a href="structAVDCT.html#a0ec74ead791a02aa244ade41f1200f1e">AVDCT::idct_permutation</a></div><div class="ttdeci">uint8_t idct_permutation[64]</div><div class="ttdoc">IDCT input permutation. </div><div class="ttdef"><b>Definition:</b> <a href="avdct_8h_source.html#l00048">avdct.h:48</a></div></div>
<div class="ttc" id="structAVDCT_html_afafee61c2c4c3cafd7a1433de9677be5"><div class="ttname"><a href="structAVDCT.html#afafee61c2c4c3cafd7a1433de9677be5">AVDCT::dct_algo</a></div><div class="ttdeci">int dct_algo</div><div class="ttdoc">DCT algorithm. </div><div class="ttdef"><b>Definition:</b> <a href="avdct_8h_source.html#l00057">avdct.h:57</a></div></div>
<div class="ttc" id="structAVDCT_html_aa40a480d0e5f91fc4399914971642579"><div class="ttname"><a href="structAVDCT.html#aa40a480d0e5f91fc4399914971642579">AVDCT::fdct</a></div><div class="ttdeci">void(* fdct)(int16_t *block)</div><div class="ttdef"><b>Definition:</b> <a href="avdct_8h_source.html#l00050">avdct.h:50</a></div></div>
<div class="ttc" id="structAVClass_html"><div class="ttname"><a href="structAVClass.html">AVClass</a></div><div class="ttdoc">Describe the class of an AVClass context structure. </div><div class="ttdef"><b>Definition:</b> <a href="log_8h_source.html#l00067">log.h:67</a></div></div>
<div class="ttc" id="structAVDCT_html_a09d578a99e0372994d8051d88c7c6454"><div class="ttname"><a href="structAVDCT.html#a09d578a99e0372994d8051d88c7c6454">AVDCT::get_pixels</a></div><div class="ttdeci">void(* get_pixels)(int16_t *block, const uint8_t *pixels, ptrdiff_t line_size)</div><div class="ttdef"><b>Definition:</b> <a href="avdct_8h_source.html#l00065">avdct.h:65</a></div></div>
<div class="ttc" id="structAVDCT_html"><div class="ttname"><a href="structAVDCT.html">AVDCT</a></div><div class="ttdoc">AVDCT context. </div><div class="ttdef"><b>Definition:</b> <a href="avdct_8h_source.html#l00029">avdct.h:29</a></div></div>
<div class="ttc" id="structAVDCT_html_a9cf1dfc2c85db6bf753182259116cba1"><div class="ttname"><a href="structAVDCT.html#a9cf1dfc2c85db6bf753182259116cba1">AVDCT::av_class</a></div><div class="ttdeci">const AVClass * av_class</div><div class="ttdef"><b>Definition:</b> <a href="avdct_8h_source.html#l00030">avdct.h:30</a></div></div>
<div class="ttc" id="avdct_8h_html_a4d987ad7fd4893904dfec30087b1a972"><div class="ttname"><a href="avdct_8h.html#a4d987ad7fd4893904dfec30087b1a972">avcodec_dct_init</a></div><div class="ttdeci">int avcodec_dct_init(AVDCT *)</div></div>
<div class="ttc" id="structAVDCT_html_aed94b220afff7a9cec826c6347d7e859"><div class="ttname"><a href="structAVDCT.html#aed94b220afff7a9cec826c6347d7e859">AVDCT::idct_algo</a></div><div class="ttdeci">int idct_algo</div><div class="ttdoc">IDCT algorithm. </div><div class="ttdef"><b>Definition:</b> <a href="avdct_8h_source.html#l00063">avdct.h:63</a></div></div>
<div class="ttc" id="structAVDCT_html_a06e927ba17a353815e5898e0ca990a1c"><div class="ttname"><a href="structAVDCT.html#a06e927ba17a353815e5898e0ca990a1c">AVDCT::idct</a></div><div class="ttdeci">void(* idct)(int16_t *block)</div><div class="ttdef"><b>Definition:</b> <a href="avdct_8h_source.html#l00032">avdct.h:32</a></div></div>
<div class="ttc" id="structAVDCT_html_aa81e0ecf9185352726fa6b5ab5bbcabf"><div class="ttname"><a href="structAVDCT.html#aa81e0ecf9185352726fa6b5ab5bbcabf">AVDCT::bits_per_sample</a></div><div class="ttdeci">int bits_per_sample</div><div class="ttdef"><b>Definition:</b> <a href="avdct_8h_source.html#l00069">avdct.h:69</a></div></div>
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