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FFmpeg/libavcodec/vc1dsp.c

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  1. /*

  2.  * VC-1 and WMV3 decoder - DSP functions

  3.  * Copyright (c) 2006 Konstantin Shishkov

  4.  *

  5.  * This file is part of FFmpeg.

  6.  *

  7.  * FFmpeg is free software; you can redistribute it and/or

  8.  * modify it under the terms of the GNU Lesser General Public

  9.  * License as published by the Free Software Foundation; either

  10.  * version 2.1 of the License, or (at your option) any later version.

  11.  *

  12.  * FFmpeg is distributed in the hope that it will be useful,

  13.  * but WITHOUT ANY WARRANTY; without even the implied warranty of

  14.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

  15.  * Lesser General Public License for more details.

  16.  *

  17.  * You should have received a copy of the GNU Lesser General Public

  18.  * License along with FFmpeg; if not, write to the Free Software

  19.  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

  20.  */

  21. 

  22. /**

  23.  * @file

  24.  * VC-1 and WMV3 decoder

  25.  *

  26.  */

  27. 

  28. #include "libavutil/avassert.h"

  29. #include "libavutil/common.h"

  30. #include "libavutil/intreadwrite.h"

  31. #include "h264chroma.h"

  32. #include "qpeldsp.h"

  33. #include "rnd_avg.h"

  34. #include "vc1dsp.h"

  35. #include "startcode.h"

  36. 

  37. /* Apply overlap transform to horizontal edge */

  38. static void vc1_v_overlap_c(uint8_t *src, int stride)

  39. {

  40.     int i;

  41.     int a, b, c, d;

  42.     int d1, d2;

  43.     int rnd = 1;

  44.     for (i = 0; i < 8; i++) {

  45.         a  = src[-2 * stride];

  46.         b  = src[-stride];

  47.         c  = src[0];

  48.         d  = src[stride];

  49.         d1 = (a - d + 3 + rnd) >> 3;

  50.         d2 = (a - d + b - c + 4 - rnd) >> 3;

  51. 

  52.         src[-2 * stride] = a - d1;

  53.         src[-stride]     = av_clip_uint8(b - d2);

  54.         src[0]           = av_clip_uint8(c + d2);

  55.         src[stride]      = d + d1;

  56.         src++;

  57.         rnd = !rnd;

  58.     }

  59. }

  60. 

  61. /* Apply overlap transform to vertical edge */

  62. static void vc1_h_overlap_c(uint8_t *src, int stride)

  63. {

  64.     int i;

  65.     int a, b, c, d;

  66.     int d1, d2;

  67.     int rnd = 1;

  68.     for (i = 0; i < 8; i++) {

  69.         a  = src[-2];

  70.         b  = src[-1];

  71.         c  = src[0];

  72.         d  = src[1];

  73.         d1 = (a - d + 3 + rnd) >> 3;

  74.         d2 = (a - d + b - c + 4 - rnd) >> 3;

  75. 

  76.         src[-2] = a - d1;

  77.         src[-1] = av_clip_uint8(b - d2);

  78.         src[0]  = av_clip_uint8(c + d2);

  79.         src[1]  = d + d1;

  80.         src    += stride;

  81.         rnd     = !rnd;

  82.     }

  83. }

  84. 

  85. static void vc1_v_s_overlap_c(int16_t *top, int16_t *bottom)

  86. {

  87.     int i;

  88.     int a, b, c, d;

  89.     int d1, d2;

  90.     int rnd1 = 4, rnd2 = 3;

  91.     for (i = 0; i < 8; i++) {

  92.         a  = top[48];

  93.         b  = top[56];

  94.         c  = bottom[0];

  95.         d  = bottom[8];

  96.         d1 = a - d;

  97.         d2 = a - d + b - c;

  98. 

  99.         top[48]   = ((a << 3) - d1 + rnd1) >> 3;

  100.         top[56]   = ((b << 3) - d2 + rnd2) >> 3;

  101.         bottom[0] = ((c << 3) + d2 + rnd1) >> 3;

  102.         bottom[8] = ((d << 3) + d1 + rnd2) >> 3;

  103. 

  104.         bottom++;

  105.         top++;

  106.         rnd2 = 7 - rnd2;

  107.         rnd1 = 7 - rnd1;

  108.     }

  109. }

  110. 

  111. static void vc1_h_s_overlap_c(int16_t *left, int16_t *right)

  112. {

  113.     int i;

  114.     int a, b, c, d;

  115.     int d1, d2;

  116.     int rnd1 = 4, rnd2 = 3;

  117.     for (i = 0; i < 8; i++) {

  118.         a  = left[6];

  119.         b  = left[7];

  120.         c  = right[0];

  121.         d  = right[1];

  122.         d1 = a - d;

  123.         d2 = a - d + b - c;

  124. 

  125.         left[6]  = ((a << 3) - d1 + rnd1) >> 3;

  126.         left[7]  = ((b << 3) - d2 + rnd2) >> 3;

  127.         right[0] = ((c << 3) + d2 + rnd1) >> 3;

  128.         right[1] = ((d << 3) + d1 + rnd2) >> 3;

  129. 

  130.         right += 8;

  131.         left  += 8;

  132.         rnd2   = 7 - rnd2;

  133.         rnd1   = 7 - rnd1;

  134.     }

  135. }

  136. 

  137. /**

  138.  * VC-1 in-loop deblocking filter for one line

  139.  * @param src source block type

  140.  * @param stride block stride

  141.  * @param pq block quantizer

  142.  * @return whether other 3 pairs should be filtered or not

  143.  * @see 8.6

  144.  */

  145. static av_always_inline int vc1_filter_line(uint8_t *src, int stride, int pq)

  146. {

  147.     int a0 = (2 * (src[-2 * stride] - src[1 * stride]) -

  148.               5 * (src[-1 * stride] - src[0 * stride]) + 4) >> 3;

  149.     int a0_sign = a0 >> 31;        /* Store sign */

  150. 

  151.     a0 = (a0 ^ a0_sign) - a0_sign; /* a0 = FFABS(a0); */

  152.     if (a0 < pq) {

  153.         int a1 = FFABS((2 * (src[-4 * stride] - src[-1 * stride]) -

  154.                         5 * (src[-3 * stride] - src[-2 * stride]) + 4) >> 3);

  155.         int a2 = FFABS((2 * (src[ 0 * stride] - src[ 3 * stride]) -

  156.                         5 * (src[ 1 * stride] - src[ 2 * stride]) + 4) >> 3);

  157.         if (a1 < a0 || a2 < a0) {

  158.             int clip      = src[-1 * stride] - src[0 * stride];

  159.             int clip_sign = clip >> 31;

  160. 

  161.             clip = ((clip ^ clip_sign) - clip_sign) >> 1;

  162.             if (clip) {

  163.                 int a3     = FFMIN(a1, a2);

  164.                 int d      = 5 * (a3 - a0);

  165.                 int d_sign = (d >> 31);

  166. 

  167.                 d       = ((d ^ d_sign) - d_sign) >> 3;

  168.                 d_sign ^= a0_sign;

  169. 

  170.                 if (d_sign ^ clip_sign)

  171.                     d = 0;

  172.                 else {

  173.                     d = FFMIN(d, clip);

  174.                     d = (d ^ d_sign) - d_sign; /* Restore sign */

  175.                     src[-1 * stride] = av_clip_uint8(src[-1 * stride] - d);

  176.                     src[ 0 * stride] = av_clip_uint8(src[ 0 * stride] + d);

  177.                 }

  178.                 return 1;

  179.             }

  180.         }

  181.     }

  182.     return 0;

  183. }

  184. 

  185. /**

  186.  * VC-1 in-loop deblocking filter

  187.  * @param src source block type

  188.  * @param step distance between horizontally adjacent elements

  189.  * @param stride distance between vertically adjacent elements

  190.  * @param len edge length to filter (4 or 8 pixels)

  191.  * @param pq block quantizer

  192.  * @see 8.6

  193.  */

  194. static inline void vc1_loop_filter(uint8_t *src, int step, int stride,

  195.                                    int len, int pq)

  196. {

  197.     int i;

  198.     int filt3;

  199. 

  200.     for (i = 0; i < len; i += 4) {

  201.         filt3 = vc1_filter_line(src + 2 * step, stride, pq);

  202.         if (filt3) {

  203.             vc1_filter_line(src + 0 * step, stride, pq);

  204.             vc1_filter_line(src + 1 * step, stride, pq);

  205.             vc1_filter_line(src + 3 * step, stride, pq);

  206.         }

  207.         src += step * 4;

  208.     }

  209. }

  210. 

  211. static void vc1_v_loop_filter4_c(uint8_t *src, int stride, int pq)

  212. {

  213.     vc1_loop_filter(src, 1, stride, 4, pq);

  214. }

  215. 

  216. static void vc1_h_loop_filter4_c(uint8_t *src, int stride, int pq)

  217. {

  218.     vc1_loop_filter(src, stride, 1, 4, pq);

  219. }

  220. 

  221. static void vc1_v_loop_filter8_c(uint8_t *src, int stride, int pq)

  222. {

  223.     vc1_loop_filter(src, 1, stride, 8, pq);

  224. }

  225. 

  226. static void vc1_h_loop_filter8_c(uint8_t *src, int stride, int pq)

  227. {

  228.     vc1_loop_filter(src, stride, 1, 8, pq);

  229. }

  230. 

  231. static void vc1_v_loop_filter16_c(uint8_t *src, int stride, int pq)

  232. {

  233.     vc1_loop_filter(src, 1, stride, 16, pq);

  234. }

  235. 

  236. static void vc1_h_loop_filter16_c(uint8_t *src, int stride, int pq)

  237. {

  238.     vc1_loop_filter(src, stride, 1, 16, pq);

  239. }

  240. 

  241. /* Do inverse transform on 8x8 block */

  242. static void vc1_inv_trans_8x8_dc_c(uint8_t *dest, int linesize, int16_t *block)

  243. {

  244.     int i;

  245.     int dc = block[0];

  246. 

  247.     dc = (3 * dc +  1) >> 1;

  248.     dc = (3 * dc + 16) >> 5;

  249. 

  250.     for (i = 0; i < 8; i++) {

  251.         dest[0] = av_clip_uint8(dest[0] + dc);

  252.         dest[1] = av_clip_uint8(dest[1] + dc);

  253.         dest[2] = av_clip_uint8(dest[2] + dc);

  254.         dest[3] = av_clip_uint8(dest[3] + dc);

  255.         dest[4] = av_clip_uint8(dest[4] + dc);

  256.         dest[5] = av_clip_uint8(dest[5] + dc);

  257.         dest[6] = av_clip_uint8(dest[6] + dc);

  258.         dest[7] = av_clip_uint8(dest[7] + dc);

  259.         dest += linesize;

  260.     }

  261. }

  262. 

  263. static void vc1_inv_trans_8x8_c(int16_t block[64])

  264. {

  265.     int i;

  266.     register int t1, t2, t3, t4, t5, t6, t7, t8;

  267.     int16_t *src, *dst, temp[64];

  268. 

  269.     src = block;

  270.     dst = temp;

  271.     for (i = 0; i < 8; i++) {

  272.         t1 = 12 * (src[ 0] + src[32]) + 4;

  273.         t2 = 12 * (src[ 0] - src[32]) + 4;

  274.         t3 = 16 * src[16] +  6 * src[48];

  275.         t4 =  6 * src[16] - 16 * src[48];

  276. 

  277.         t5 = t1 + t3;

  278.         t6 = t2 + t4;

  279.         t7 = t2 - t4;

  280.         t8 = t1 - t3;

  281. 

  282.         t1 = 16 * src[ 8] + 15 * src[24] +  9 * src[40] +  4 * src[56];

  283.         t2 = 15 * src[ 8] -  4 * src[24] - 16 * src[40] -  9 * src[56];

  284.         t3 =  9 * src[ 8] - 16 * src[24] +  4 * src[40] + 15 * src[56];

  285.         t4 =  4 * src[ 8] -  9 * src[24] + 15 * src[40] - 16 * src[56];

  286. 

  287.         dst[0] = (t5 + t1) >> 3;

  288.         dst[1] = (t6 + t2) >> 3;

  289.         dst[2] = (t7 + t3) >> 3;

  290.         dst[3] = (t8 + t4) >> 3;

  291.         dst[4] = (t8 - t4) >> 3;

  292.         dst[5] = (t7 - t3) >> 3;

  293.         dst[6] = (t6 - t2) >> 3;

  294.         dst[7] = (t5 - t1) >> 3;

  295. 

  296.         src += 1;

  297.         dst += 8;

  298.     }

  299. 

  300.     src = temp;

  301.     dst = block;

  302.     for (i = 0; i < 8; i++) {

  303.         t1 = 12 * (src[ 0] + src[32]) + 64;

  304.         t2 = 12 * (src[ 0] - src[32]) + 64;

  305.         t3 = 16 * src[16] +  6 * src[48];

  306.         t4 =  6 * src[16] - 16 * src[48];

  307. 

  308.         t5 = t1 + t3;

  309.         t6 = t2 + t4;

  310.         t7 = t2 - t4;

  311.         t8 = t1 - t3;

  312. 

  313.         t1 = 16 * src[ 8] + 15 * src[24] +  9 * src[40] +  4 * src[56];

  314.         t2 = 15 * src[ 8] -  4 * src[24] - 16 * src[40] -  9 * src[56];

  315.         t3 =  9 * src[ 8] - 16 * src[24] +  4 * src[40] + 15 * src[56];

  316.         t4 =  4 * src[ 8] -  9 * src[24] + 15 * src[40] - 16 * src[56];

  317. 

  318.         dst[ 0] = (t5 + t1) >> 7;

  319.         dst[ 8] = (t6 + t2) >> 7;

  320.         dst[16] = (t7 + t3) >> 7;

  321.         dst[24] = (t8 + t4) >> 7;

  322.         dst[32] = (t8 - t4 + 1) >> 7;

  323.         dst[40] = (t7 - t3 + 1) >> 7;

  324.         dst[48] = (t6 - t2 + 1) >> 7;

  325.         dst[56] = (t5 - t1 + 1) >> 7;

  326. 

  327.         src++;

  328.         dst++;

  329.     }

  330. }

  331. 

  332. /* Do inverse transform on 8x4 part of block */

  333. static void vc1_inv_trans_8x4_dc_c(uint8_t *dest, int linesize, int16_t *block)

  334. {

  335.     int i;

  336.     int dc = block[0];

  337. 

  338.     dc =  (3 * dc +  1) >> 1;

  339.     dc = (17 * dc + 64) >> 7;

  340. 

  341.     for (i = 0; i < 4; i++) {

  342.         dest[0] = av_clip_uint8(dest[0] + dc);

  343.         dest[1] = av_clip_uint8(dest[1] + dc);

  344.         dest[2] = av_clip_uint8(dest[2] + dc);

  345.         dest[3] = av_clip_uint8(dest[3] + dc);

  346.         dest[4] = av_clip_uint8(dest[4] + dc);

  347.         dest[5] = av_clip_uint8(dest[5] + dc);

  348.         dest[6] = av_clip_uint8(dest[6] + dc);

  349.         dest[7] = av_clip_uint8(dest[7] + dc);

  350.         dest += linesize;

  351.     }

  352. }

  353. 

  354. static void vc1_inv_trans_8x4_c(uint8_t *dest, int linesize, int16_t *block)

  355. {

  356.     int i;

  357.     register int t1, t2, t3, t4, t5, t6, t7, t8;

  358.     int16_t *src, *dst;

  359. 

  360.     src = block;

  361.     dst = block;

  362. 

  363.     for (i = 0; i < 4; i++) {

  364.         t1 = 12 * (src[0] + src[4]) + 4;

  365.         t2 = 12 * (src[0] - src[4]) + 4;

  366.         t3 = 16 * src[2] +  6 * src[6];

  367.         t4 =  6 * src[2] - 16 * src[6];

  368. 

  369.         t5 = t1 + t3;

  370.         t6 = t2 + t4;

  371.         t7 = t2 - t4;

  372.         t8 = t1 - t3;

  373. 

  374.         t1 = 16 * src[1] + 15 * src[3] +  9 * src[5] +  4 * src[7];

  375.         t2 = 15 * src[1] -  4 * src[3] - 16 * src[5] -  9 * src[7];

  376.         t3 =  9 * src[1] - 16 * src[3] +  4 * src[5] + 15 * src[7];

  377.         t4 =  4 * src[1] -  9 * src[3] + 15 * src[5] - 16 * src[7];

  378. 

  379.         dst[0] = (t5 + t1) >> 3;

  380.         dst[1] = (t6 + t2) >> 3;

  381.         dst[2] = (t7 + t3) >> 3;

  382.         dst[3] = (t8 + t4) >> 3;

  383.         dst[4] = (t8 - t4) >> 3;

  384.         dst[5] = (t7 - t3) >> 3;

  385.         dst[6] = (t6 - t2) >> 3;

  386.         dst[7] = (t5 - t1) >> 3;

  387. 

  388.         src += 8;

  389.         dst += 8;

  390.     }

  391. 

  392.     src = block;

  393.     for (i = 0; i < 8; i++) {

  394.         t1 = 17 * (src[ 0] + src[16]) + 64;

  395.         t2 = 17 * (src[ 0] - src[16]) + 64;

  396.         t3 = 22 * src[ 8] + 10 * src[24];

  397.         t4 = 22 * src[24] - 10 * src[ 8];

  398. 

  399.         dest[0 * linesize] = av_clip_uint8(dest[0 * linesize] + ((t1 + t3) >> 7));

  400.         dest[1 * linesize] = av_clip_uint8(dest[1 * linesize] + ((t2 - t4) >> 7));

  401.         dest[2 * linesize] = av_clip_uint8(dest[2 * linesize] + ((t2 + t4) >> 7));

  402.         dest[3 * linesize] = av_clip_uint8(dest[3 * linesize] + ((t1 - t3) >> 7));

  403. 

  404.         src++;

  405.         dest++;

  406.     }

  407. }

  408. 

  409. /* Do inverse transform on 4x8 parts of block */

  410. static void vc1_inv_trans_4x8_dc_c(uint8_t *dest, int linesize, int16_t *block)

  411. {

  412.     int i;

  413.     int dc = block[0];

  414. 

  415.     dc = (17 * dc +  4) >> 3;

  416.     dc = (12 * dc + 64) >> 7;

  417. 

  418.     for (i = 0; i < 8; i++) {

  419.         dest[0] = av_clip_uint8(dest[0] + dc);

  420.         dest[1] = av_clip_uint8(dest[1] + dc);

  421.         dest[2] = av_clip_uint8(dest[2] + dc);

  422.         dest[3] = av_clip_uint8(dest[3] + dc);

  423.         dest += linesize;

  424.     }

  425. }

  426. 

  427. static void vc1_inv_trans_4x8_c(uint8_t *dest, int linesize, int16_t *block)

  428. {

  429.     int i;

  430.     register int t1, t2, t3, t4, t5, t6, t7, t8;

  431.     int16_t *src, *dst;

  432. 

  433.     src = block;

  434.     dst = block;

  435. 

  436.     for (i = 0; i < 8; i++) {

  437.         t1 = 17 * (src[0] + src[2]) + 4;

  438.         t2 = 17 * (src[0] - src[2]) + 4;

  439.         t3 = 22 * src[1] + 10 * src[3];

  440.         t4 = 22 * src[3] - 10 * src[1];

  441. 

  442.         dst[0] = (t1 + t3) >> 3;

  443.         dst[1] = (t2 - t4) >> 3;

  444.         dst[2] = (t2 + t4) >> 3;

  445.         dst[3] = (t1 - t3) >> 3;

  446. 

  447.         src += 8;

  448.         dst += 8;

  449.     }

  450. 

  451.     src = block;

  452.     for (i = 0; i < 4; i++) {

  453.         t1 = 12 * (src[ 0] + src[32]) + 64;

  454.         t2 = 12 * (src[ 0] - src[32]) + 64;

  455.         t3 = 16 * src[16] +  6 * src[48];

  456.         t4 =  6 * src[16] - 16 * src[48];

  457. 

  458.         t5 = t1 + t3;

  459.         t6 = t2 + t4;

  460.         t7 = t2 - t4;

  461.         t8 = t1 - t3;

  462. 

  463.         t1 = 16 * src[ 8] + 15 * src[24] +  9 * src[40] +  4 * src[56];

  464.         t2 = 15 * src[ 8] -  4 * src[24] - 16 * src[40] -  9 * src[56];

  465.         t3 =  9 * src[ 8] - 16 * src[24] +  4 * src[40] + 15 * src[56];

  466.         t4 =  4 * src[ 8] -  9 * src[24] + 15 * src[40] - 16 * src[56];

  467. 

  468.         dest[0 * linesize] = av_clip_uint8(dest[0 * linesize] + ((t5 + t1)     >> 7));

  469.         dest[1 * linesize] = av_clip_uint8(dest[1 * linesize] + ((t6 + t2)     >> 7));

  470.         dest[2 * linesize] = av_clip_uint8(dest[2 * linesize] + ((t7 + t3)     >> 7));

  471.         dest[3 * linesize] = av_clip_uint8(dest[3 * linesize] + ((t8 + t4)     >> 7));

  472.         dest[4 * linesize] = av_clip_uint8(dest[4 * linesize] + ((t8 - t4 + 1) >> 7));

  473.         dest[5 * linesize] = av_clip_uint8(dest[5 * linesize] + ((t7 - t3 + 1) >> 7));

  474.         dest[6 * linesize] = av_clip_uint8(dest[6 * linesize] + ((t6 - t2 + 1) >> 7));

  475.         dest[7 * linesize] = av_clip_uint8(dest[7 * linesize] + ((t5 - t1 + 1) >> 7));

  476. 

  477.         src++;

  478.         dest++;

  479.     }

  480. }

  481. 

  482. /* Do inverse transform on 4x4 part of block */

  483. static void vc1_inv_trans_4x4_dc_c(uint8_t *dest, int linesize, int16_t *block)

  484. {

  485.     int i;

  486.     int dc = block[0];

  487. 

  488.     dc = (17 * dc +  4) >> 3;

  489.     dc = (17 * dc + 64) >> 7;

  490. 

  491.     for (i = 0; i < 4; i++) {

  492.         dest[0] = av_clip_uint8(dest[0] + dc);

  493.         dest[1] = av_clip_uint8(dest[1] + dc);

  494.         dest[2] = av_clip_uint8(dest[2] + dc);

  495.         dest[3] = av_clip_uint8(dest[3] + dc);

  496.         dest += linesize;

  497.     }

  498. }

  499. 

  500. static void vc1_inv_trans_4x4_c(uint8_t *dest, int linesize, int16_t *block)

  501. {

  502.     int i;

  503.     register int t1, t2, t3, t4;

  504.     int16_t *src, *dst;

  505. 

  506.     src = block;

  507.     dst = block;

  508.     for (i = 0; i < 4; i++) {

  509.         t1 = 17 * (src[0] + src[2]) + 4;

  510.         t2 = 17 * (src[0] - src[2]) + 4;

  511.         t3 = 22 * src[1] + 10 * src[3];

  512.         t4 = 22 * src[3] - 10 * src[1];

  513. 

  514.         dst[0] = (t1 + t3) >> 3;

  515.         dst[1] = (t2 - t4) >> 3;

  516.         dst[2] = (t2 + t4) >> 3;

  517.         dst[3] = (t1 - t3) >> 3;

  518. 

  519.         src += 8;

  520.         dst += 8;

  521.     }

  522. 

  523.     src = block;

  524.     for (i = 0; i < 4; i++) {

  525.         t1 = 17 * (src[0] + src[16]) + 64;

  526.         t2 = 17 * (src[0] - src[16]) + 64;

  527.         t3 = 22 * src[8] + 10 * src[24];

  528.         t4 = 22 * src[24] - 10 * src[8];

  529. 

  530.         dest[0 * linesize] = av_clip_uint8(dest[0 * linesize] + ((t1 + t3) >> 7));

  531.         dest[1 * linesize] = av_clip_uint8(dest[1 * linesize] + ((t2 - t4) >> 7));

  532.         dest[2 * linesize] = av_clip_uint8(dest[2 * linesize] + ((t2 + t4) >> 7));

  533.         dest[3 * linesize] = av_clip_uint8(dest[3 * linesize] + ((t1 - t3) >> 7));

  534. 

  535.         src++;

  536.         dest++;

  537.     }

  538. }

  539. 

  540. /* motion compensation functions */

  541. 

  542. /* Filter in case of 2 filters */

  543. #define VC1_MSPEL_FILTER_16B(DIR, TYPE)                                       \

  544. static av_always_inline int vc1_mspel_ ## DIR ## _filter_16bits(const TYPE *src, \

  545.                                                                 int stride,   \

  546.                                                                 int mode)     \

  547. {                                                                             \

  548.     switch(mode) {                                                            \

  549.     case 0: /* no shift - should not occur */                                 \

  550.         return 0;                                                             \

  551.     case 1: /* 1/4 shift */                                                   \

  552.         return -4 * src[-stride] + 53 * src[0] +                              \

  553.                18 * src[stride]  -  3 * src[stride * 2];                      \

  554.     case 2: /* 1/2 shift */                                                   \

  555.         return -1 * src[-stride] +  9 * src[0] +                              \

  556.                 9 * src[stride]  -  1 * src[stride * 2];                      \

  557.     case 3: /* 3/4 shift */                                                   \

  558.         return -3 * src[-stride] + 18 * src[0] +                              \

  559.                53 * src[stride]  -  4 * src[stride * 2];                      \

  560.     }                                                                         \

  561.     return 0; /* should not occur */                                          \

  562. }

  563. 

  564. VC1_MSPEL_FILTER_16B(ver, uint8_t)

  565. VC1_MSPEL_FILTER_16B(hor, int16_t)

  566. 

  567. /* Filter used to interpolate fractional pel values */

  568. static av_always_inline int vc1_mspel_filter(const uint8_t *src, int stride,

  569.                                              int mode, int r)

  570. {

  571.     switch (mode) {

  572.     case 0: // no shift

  573.         return src[0];

  574.     case 1: // 1/4 shift

  575.         return (-4 * src[-stride] + 53 * src[0] +

  576.                 18 * src[stride]  -  3 * src[stride * 2] + 32 - r) >> 6;

  577.     case 2: // 1/2 shift

  578.         return (-1 * src[-stride] +  9 * src[0] +

  579.                  9 * src[stride]  -  1 * src[stride * 2] + 8 - r) >> 4;

  580.     case 3: // 3/4 shift

  581.         return (-3 * src[-stride] + 18 * src[0] +

  582.                 53 * src[stride]  -  4 * src[stride * 2] + 32 - r) >> 6;

  583.     }

  584.     return 0; // should not occur

  585. }

  586. 

  587. /* Function used to do motion compensation with bicubic interpolation */

  588. #define VC1_MSPEL_MC(OP, OP4, OPNAME)                                         \

  589. static av_always_inline void OPNAME ## vc1_mspel_mc(uint8_t *dst,             \

  590.                                                     const uint8_t *src,       \

  591.                                                     ptrdiff_t stride,         \

  592.                                                     int hmode,                \

  593.                                                     int vmode,                \

  594.                                                     int rnd)                  \

  595. {                                                                             \

  596.     int i, j;                                                                 \

  597.                                                                               \

  598.     if (vmode) { /* Horizontal filter to apply */                             \

  599.         int r;                                                                \

  600.                                                                               \

  601.         if (hmode) { /* Vertical filter to apply, output to tmp */            \

  602.             static const int shift_value[] = { 0, 5, 1, 5 };                  \

  603.             int shift = (shift_value[hmode] + shift_value[vmode]) >> 1;       \

  604.             int16_t tmp[11 * 8], *tptr = tmp;                                 \

  605.                                                                               \

  606.             r = (1 << (shift - 1)) + rnd - 1;                                 \

  607.                                                                               \

  608.             src -= 1;                                                         \

  609.             for (j = 0; j < 8; j++) {                                         \

  610.                 for (i = 0; i < 11; i++)                                      \

  611.                     tptr[i] = (vc1_mspel_ver_filter_16bits(src + i, stride, vmode) + r) >> shift; \

  612.                 src  += stride;                                               \

  613.                 tptr += 11;                                                   \

  614.             }                                                                 \

  615.                                                                               \

  616.             r    = 64 - rnd;                                                  \

  617.             tptr = tmp + 1;                                                   \

  618.             for (j = 0; j < 8; j++) {                                         \

  619.                 for (i = 0; i < 8; i++)                                       \

  620.                     OP(dst[i], (vc1_mspel_hor_filter_16bits(tptr + i, 1, hmode) + r) >> 7); \

  621.                 dst  += stride;                                               \

  622.                 tptr += 11;                                                   \

  623.             }                                                                 \

  624.                                                                               \

  625.             return;                                                           \

  626.         } else { /* No horizontal filter, output 8 lines to dst */            \

  627.             r = 1 - rnd;                                                      \

  628.                                                                               \

  629.             for (j = 0; j < 8; j++) {                                         \

  630.                 for (i = 0; i < 8; i++)                                       \

  631.                     OP(dst[i], vc1_mspel_filter(src + i, stride, vmode, r));  \

  632.                 src += stride;                                                \

  633.                 dst += stride;                                                \

  634.             }                                                                 \

  635.             return;                                                           \

  636.         }                                                                     \

  637.     }                                                                         \

  638.                                                                               \

  639.     /* Horizontal mode with no vertical mode */                               \

  640.     for (j = 0; j < 8; j++) {                                                 \

  641.         for (i = 0; i < 8; i++)                                               \

  642.             OP(dst[i], vc1_mspel_filter(src + i, 1, hmode, rnd));             \

  643.         dst += stride;                                                        \

  644.         src += stride;                                                        \

  645.     }                                                                         \

  646. }\

  647. static av_always_inline void OPNAME ## vc1_mspel_mc_16(uint8_t *dst,          \

  648.                                                        const uint8_t *src,    \

  649.                                                        ptrdiff_t stride,      \

  650.                                                        int hmode,             \

  651.                                                        int vmode,             \

  652.                                                        int rnd)               \

  653. {                                                                             \

  654.     int i, j;                                                                 \

  655.                                                                               \

  656.     if (vmode) { /* Horizontal filter to apply */                             \

  657.         int r;                                                                \

  658.                                                                               \

  659.         if (hmode) { /* Vertical filter to apply, output to tmp */            \

  660.             static const int shift_value[] = { 0, 5, 1, 5 };                  \

  661.             int shift = (shift_value[hmode] + shift_value[vmode]) >> 1;       \

  662.             int16_t tmp[19 * 16], *tptr = tmp;                                \

  663.                                                                               \

  664.             r = (1 << (shift - 1)) + rnd - 1;                                 \

  665.                                                                               \

  666.             src -= 1;                                                         \

  667.             for (j = 0; j < 16; j++) {                                        \

  668.                 for (i = 0; i < 19; i++)                                      \

  669.                     tptr[i] = (vc1_mspel_ver_filter_16bits(src + i, stride, vmode) + r) >> shift; \

  670.                 src  += stride;                                               \

  671.                 tptr += 19;                                                   \

  672.             }                                                                 \

  673.                                                                               \

  674.             r    = 64 - rnd;                                                  \

  675.             tptr = tmp + 1;                                                   \

  676.             for (j = 0; j < 16; j++) {                                        \

  677.                 for (i = 0; i < 16; i++)                                      \

  678.                     OP(dst[i], (vc1_mspel_hor_filter_16bits(tptr + i, 1, hmode) + r) >> 7); \

  679.                 dst  += stride;                                               \

  680.                 tptr += 19;                                                   \

  681.             }                                                                 \

  682.                                                                               \

  683.             return;                                                           \

  684.         } else { /* No horizontal filter, output 8 lines to dst */            \

  685.             r = 1 - rnd;                                                      \

  686.                                                                               \

  687.             for (j = 0; j < 16; j++) {                                        \

  688.                 for (i = 0; i < 16; i++)                                      \

  689.                     OP(dst[i], vc1_mspel_filter(src + i, stride, vmode, r));  \

  690.                 src += stride;                                                \

  691.                 dst += stride;                                                \

  692.             }                                                                 \

  693.             return;                                                           \

  694.         }                                                                     \

  695.     }                                                                         \

  696.                                                                               \

  697.     /* Horizontal mode with no vertical mode */                               \

  698.     for (j = 0; j < 16; j++) {                                                \

  699.         for (i = 0; i < 16; i++)                                              \

  700.             OP(dst[i], vc1_mspel_filter(src + i, 1, hmode, rnd));             \

  701.         dst += stride;                                                        \

  702.         src += stride;                                                        \

  703.     }                                                                         \

  704. }\

  705. static void OPNAME ## pixels8x8_c(uint8_t *block, const uint8_t *pixels, ptrdiff_t line_size, int rnd){\

  706.     int i;\

  707.     for(i=0; i<8; i++){\

  708.         OP4(*(uint32_t*)(block  ), AV_RN32(pixels  ));\

  709.         OP4(*(uint32_t*)(block+4), AV_RN32(pixels+4));\

  710.         pixels+=line_size;\

  711.         block +=line_size;\

  712.     }\

  713. }\

  714. static void OPNAME ## pixels16x16_c(uint8_t *block, const uint8_t *pixels, ptrdiff_t line_size, int rnd){\

  715.     int i;\

  716.     for(i=0; i<16; i++){\

  717.         OP4(*(uint32_t*)(block   ), AV_RN32(pixels   ));\

  718.         OP4(*(uint32_t*)(block+ 4), AV_RN32(pixels+ 4));\

  719.         OP4(*(uint32_t*)(block+ 8), AV_RN32(pixels+ 8));\

  720.         OP4(*(uint32_t*)(block+12), AV_RN32(pixels+12));\

  721.         pixels+=line_size;\

  722.         block +=line_size;\

  723.     }\

  724. }

  725. 

  726. #define op_put(a, b) (a) = av_clip_uint8(b)

  727. #define op_avg(a, b) (a) = ((a) + av_clip_uint8(b) + 1) >> 1

  728. #define op4_avg(a, b) (a) = rnd_avg32(a, b)

  729. #define op4_put(a, b) (a) = (b)

  730. 

  731. VC1_MSPEL_MC(op_put, op4_put, put_)

  732. VC1_MSPEL_MC(op_avg, op4_avg, avg_)

  733. 

  734. /* pixel functions - really are entry points to vc1_mspel_mc */

  735. 

  736. #define PUT_VC1_MSPEL(a, b)                                                   \

  737. static void put_vc1_mspel_mc ## a ## b ## _c(uint8_t *dst,                    \

  738.                                              const uint8_t *src,              \

  739.                                              ptrdiff_t stride, int rnd)       \

  740. {                                                                             \

  741.     put_vc1_mspel_mc(dst, src, stride, a, b, rnd);                            \

  742. }                                                                             \

  743. static void avg_vc1_mspel_mc ## a ## b ## _c(uint8_t *dst,                    \

  744.                                              const uint8_t *src,              \

  745.                                              ptrdiff_t stride, int rnd)       \

  746. {                                                                             \

  747.     avg_vc1_mspel_mc(dst, src, stride, a, b, rnd);                            \

  748. }                                                                             \

  749. static void put_vc1_mspel_mc ## a ## b ## _16_c(uint8_t *dst,                 \

  750.                                                 const uint8_t *src,           \

  751.                                                 ptrdiff_t stride, int rnd)    \

  752. {                                                                             \

  753.     put_vc1_mspel_mc_16(dst, src, stride, a, b, rnd);                         \

  754. }                                                                             \

  755. static void avg_vc1_mspel_mc ## a ## b ## _16_c(uint8_t *dst,                 \

  756.                                                 const uint8_t *src,           \

  757.                                                 ptrdiff_t stride, int rnd)    \

  758. {                                                                             \

  759.     avg_vc1_mspel_mc_16(dst, src, stride, a, b, rnd);                         \

  760. }

  761. 

  762. PUT_VC1_MSPEL(1, 0)

  763. PUT_VC1_MSPEL(2, 0)

  764. PUT_VC1_MSPEL(3, 0)

  765. 

  766. PUT_VC1_MSPEL(0, 1)

  767. PUT_VC1_MSPEL(1, 1)

  768. PUT_VC1_MSPEL(2, 1)

  769. PUT_VC1_MSPEL(3, 1)

  770. 

  771. PUT_VC1_MSPEL(0, 2)

  772. PUT_VC1_MSPEL(1, 2)

  773. PUT_VC1_MSPEL(2, 2)

  774. PUT_VC1_MSPEL(3, 2)

  775. 

  776. PUT_VC1_MSPEL(0, 3)

  777. PUT_VC1_MSPEL(1, 3)

  778. PUT_VC1_MSPEL(2, 3)

  779. PUT_VC1_MSPEL(3, 3)

  780. 

  781. #define chroma_mc(a) \

  782.     ((A * src[a] + B * src[a + 1] + \

  783.       C * src[stride + a] + D * src[stride + a + 1] + 32 - 4) >> 6)

  784. static void put_no_rnd_vc1_chroma_mc8_c(uint8_t *dst /* align 8 */,

  785.                                         uint8_t *src /* align 1 */,

  786.                                         int stride, int h, int x, int y)

  787. {

  788.     const int A = (8 - x) * (8 - y);

  789.     const int B =     (x) * (8 - y);

  790.     const int C = (8 - x) *     (y);

  791.     const int D =     (x) *     (y);

  792.     int i;

  793. 

  794.     av_assert2(x < 8 && y < 8 && x >= 0 && y >= 0);

  795. 

  796.     for (i = 0; i < h; i++) {

  797.         dst[0] = chroma_mc(0);

  798.         dst[1] = chroma_mc(1);

  799.         dst[2] = chroma_mc(2);

  800.         dst[3] = chroma_mc(3);

  801.         dst[4] = chroma_mc(4);

  802.         dst[5] = chroma_mc(5);

  803.         dst[6] = chroma_mc(6);

  804.         dst[7] = chroma_mc(7);

  805.         dst += stride;

  806.         src += stride;

  807.     }

  808. }

  809. 

  810. static void put_no_rnd_vc1_chroma_mc4_c(uint8_t *dst, uint8_t *src,

  811.                                         int stride, int h, int x, int y)

  812. {

  813.     const int A = (8 - x) * (8 - y);

  814.     const int B =     (x) * (8 - y);

  815.     const int C = (8 - x) *     (y);

  816.     const int D =     (x) *     (y);

  817.     int i;

  818. 

  819.     av_assert2(x < 8 && y < 8 && x >= 0 && y >= 0);

  820. 

  821.     for (i = 0; i < h; i++) {

  822.         dst[0] = chroma_mc(0);

  823.         dst[1] = chroma_mc(1);

  824.         dst[2] = chroma_mc(2);

  825.         dst[3] = chroma_mc(3);

  826.         dst += stride;

  827.         src += stride;

  828.     }

  829. }

  830. 

  831. #define avg2(a, b) (((a) + (b) + 1) >> 1)

  832. static void avg_no_rnd_vc1_chroma_mc8_c(uint8_t *dst /* align 8 */,

  833.                                         uint8_t *src /* align 1 */,

  834.                                         int stride, int h, int x, int y)

  835. {

  836.     const int A = (8 - x) * (8 - y);

  837.     const int B =     (x) * (8 - y);

  838.     const int C = (8 - x) *     (y);

  839.     const int D =     (x) *     (y);

  840.     int i;

  841. 

  842.     av_assert2(x < 8 && y < 8 && x >= 0 && y >= 0);

  843. 

  844.     for (i = 0; i < h; i++) {

  845.         dst[0] = avg2(dst[0], chroma_mc(0));

  846.         dst[1] = avg2(dst[1], chroma_mc(1));

  847.         dst[2] = avg2(dst[2], chroma_mc(2));

  848.         dst[3] = avg2(dst[3], chroma_mc(3));

  849.         dst[4] = avg2(dst[4], chroma_mc(4));

  850.         dst[5] = avg2(dst[5], chroma_mc(5));

  851.         dst[6] = avg2(dst[6], chroma_mc(6));

  852.         dst[7] = avg2(dst[7], chroma_mc(7));

  853.         dst += stride;

  854.         src += stride;

  855.     }

  856. }

  857. 

  858. static void avg_no_rnd_vc1_chroma_mc4_c(uint8_t *dst /* align 8 */,

  859.                                         uint8_t *src /* align 1 */,

  860.                                         int stride, int h, int x, int y)

  861. {

  862.     const int A = (8 - x) * (8 - y);

  863.     const int B = (    x) * (8 - y);

  864.     const int C = (8 - x) * (    y);

  865.     const int D = (    x) * (    y);

  866.     int i;

  867. 

  868.     av_assert2(x < 8 && y < 8 && x >= 0 && y >= 0);

  869. 

  870.     for (i = 0; i < h; i++) {

  871.         dst[0] = avg2(dst[0], chroma_mc(0));

  872.         dst[1] = avg2(dst[1], chroma_mc(1));

  873.         dst[2] = avg2(dst[2], chroma_mc(2));

  874.         dst[3] = avg2(dst[3], chroma_mc(3));

  875.         dst += stride;

  876.         src += stride;

  877.     }

  878. }

  879. 

  880. #if CONFIG_WMV3IMAGE_DECODER || CONFIG_VC1IMAGE_DECODER

  881. 

  882. static void sprite_h_c(uint8_t *dst, const uint8_t *src, int offset,

  883.                        int advance, int count)

  884. {

  885.     while (count--) {

  886.         int a = src[(offset >> 16)];

  887.         int b = src[(offset >> 16) + 1];

  888.         *dst++  = a + ((b - a) * (offset & 0xFFFF) >> 16);

  889.         offset += advance;

  890.     }

  891. }

  892. 

  893. static av_always_inline void sprite_v_template(uint8_t *dst,

  894.                                                const uint8_t *src1a,

  895.                                                const uint8_t *src1b,

  896.                                                int offset1,

  897.                                                int two_sprites,

  898.                                                const uint8_t *src2a,

  899.                                                const uint8_t *src2b,

  900.                                                int offset2,

  901.                                                int alpha, int scaled,

  902.                                                int width)

  903. {

  904.     int a1, b1, a2, b2;

  905.     while (width--) {

  906.         a1 = *src1a++;

  907.         if (scaled) {

  908.             b1 = *src1b++;

  909.             a1 = a1 + ((b1 - a1) * offset1 >> 16);

  910.         }

  911.         if (two_sprites) {

  912.             a2 = *src2a++;

  913.             if (scaled > 1) {

  914.                 b2 = *src2b++;

  915.                 a2 = a2 + ((b2 - a2) * offset2 >> 16);

  916.             }

  917.             a1 = a1 + ((a2 - a1) * alpha >> 16);

  918.         }

  919.         *dst++ = a1;

  920.     }

  921. }

  922. 

  923. static void sprite_v_single_c(uint8_t *dst, const uint8_t *src1a,

  924.                               const uint8_t *src1b,

  925.                               int offset, int width)

  926. {

  927.     sprite_v_template(dst, src1a, src1b, offset, 0, NULL, NULL, 0, 0, 1, width);

  928. }

  929. 

  930. static void sprite_v_double_noscale_c(uint8_t *dst, const uint8_t *src1a,

  931.                                       const uint8_t *src2a,

  932.                                       int alpha, int width)

  933. {

  934.     sprite_v_template(dst, src1a, NULL, 0, 1, src2a, NULL, 0, alpha, 0, width);

  935. }

  936. 

  937. static void sprite_v_double_onescale_c(uint8_t *dst,

  938.                                        const uint8_t *src1a,

  939.                                        const uint8_t *src1b,

  940.                                        int offset1,

  941.                                        const uint8_t *src2a,

  942.                                        int alpha, int width)

  943. {

  944.     sprite_v_template(dst, src1a, src1b, offset1, 1, src2a, NULL, 0, alpha, 1,

  945.                       width);

  946. }

  947. 

  948. static void sprite_v_double_twoscale_c(uint8_t *dst,

  949.                                        const uint8_t *src1a,

  950.                                        const uint8_t *src1b,

  951.                                        int offset1,

  952.                                        const uint8_t *src2a,

  953.                                        const uint8_t *src2b,

  954.                                        int offset2,

  955.                                        int alpha,

  956.                                        int width)

  957. {

  958.     sprite_v_template(dst, src1a, src1b, offset1, 1, src2a, src2b, offset2,

  959.                       alpha, 2, width);

  960. }

  961. 

  962. #endif /* CONFIG_WMV3IMAGE_DECODER || CONFIG_VC1IMAGE_DECODER */

  963. #define FN_ASSIGN(X, Y) \

  964.     dsp->put_vc1_mspel_pixels_tab[1][X+4*Y] = put_vc1_mspel_mc##X##Y##_c; \

  965.     dsp->put_vc1_mspel_pixels_tab[0][X+4*Y] = put_vc1_mspel_mc##X##Y##_16_c; \

  966.     dsp->avg_vc1_mspel_pixels_tab[1][X+4*Y] = avg_vc1_mspel_mc##X##Y##_c; \

  967.     dsp->avg_vc1_mspel_pixels_tab[0][X+4*Y] = avg_vc1_mspel_mc##X##Y##_16_c

  968. 

  969. av_cold void ff_vc1dsp_init(VC1DSPContext *dsp)

  970. {

  971.     dsp->vc1_inv_trans_8x8    = vc1_inv_trans_8x8_c;

  972.     dsp->vc1_inv_trans_4x8    = vc1_inv_trans_4x8_c;

  973.     dsp->vc1_inv_trans_8x4    = vc1_inv_trans_8x4_c;

  974.     dsp->vc1_inv_trans_4x4    = vc1_inv_trans_4x4_c;

  975.     dsp->vc1_inv_trans_8x8_dc = vc1_inv_trans_8x8_dc_c;

  976.     dsp->vc1_inv_trans_4x8_dc = vc1_inv_trans_4x8_dc_c;

  977.     dsp->vc1_inv_trans_8x4_dc = vc1_inv_trans_8x4_dc_c;

  978.     dsp->vc1_inv_trans_4x4_dc = vc1_inv_trans_4x4_dc_c;

  979. 

  980.     dsp->vc1_h_overlap        = vc1_h_overlap_c;

  981.     dsp->vc1_v_overlap        = vc1_v_overlap_c;

  982.     dsp->vc1_h_s_overlap      = vc1_h_s_overlap_c;

  983.     dsp->vc1_v_s_overlap      = vc1_v_s_overlap_c;

  984. 

  985.     dsp->vc1_v_loop_filter4   = vc1_v_loop_filter4_c;

  986.     dsp->vc1_h_loop_filter4   = vc1_h_loop_filter4_c;

  987.     dsp->vc1_v_loop_filter8   = vc1_v_loop_filter8_c;

  988.     dsp->vc1_h_loop_filter8   = vc1_h_loop_filter8_c;

  989.     dsp->vc1_v_loop_filter16  = vc1_v_loop_filter16_c;

  990.     dsp->vc1_h_loop_filter16  = vc1_h_loop_filter16_c;

  991. 

  992.     dsp->put_vc1_mspel_pixels_tab[0][0] = put_pixels16x16_c;

  993.     dsp->avg_vc1_mspel_pixels_tab[0][0] = avg_pixels16x16_c;

  994.     dsp->put_vc1_mspel_pixels_tab[1][0] = put_pixels8x8_c;

  995.     dsp->avg_vc1_mspel_pixels_tab[1][0] = avg_pixels8x8_c;

  996.     FN_ASSIGN(0, 1);

  997.     FN_ASSIGN(0, 2);

  998.     FN_ASSIGN(0, 3);

  999. 

  1000.     FN_ASSIGN(1, 0);

  1001.     FN_ASSIGN(1, 1);

  1002.     FN_ASSIGN(1, 2);

  1003.     FN_ASSIGN(1, 3);

  1004. 

  1005.     FN_ASSIGN(2, 0);

  1006.     FN_ASSIGN(2, 1);

  1007.     FN_ASSIGN(2, 2);

  1008.     FN_ASSIGN(2, 3);

  1009. 

  1010.     FN_ASSIGN(3, 0);

  1011.     FN_ASSIGN(3, 1);

  1012.     FN_ASSIGN(3, 2);

  1013.     FN_ASSIGN(3, 3);

  1014. 

  1015.     dsp->put_no_rnd_vc1_chroma_pixels_tab[0] = put_no_rnd_vc1_chroma_mc8_c;

  1016.     dsp->avg_no_rnd_vc1_chroma_pixels_tab[0] = avg_no_rnd_vc1_chroma_mc8_c;

  1017.     dsp->put_no_rnd_vc1_chroma_pixels_tab[1] = put_no_rnd_vc1_chroma_mc4_c;

  1018.     dsp->avg_no_rnd_vc1_chroma_pixels_tab[1] = avg_no_rnd_vc1_chroma_mc4_c;

  1019. 

  1020. #if CONFIG_WMV3IMAGE_DECODER || CONFIG_VC1IMAGE_DECODER

  1021.     dsp->sprite_h                 = sprite_h_c;

  1022.     dsp->sprite_v_single          = sprite_v_single_c;

  1023.     dsp->sprite_v_double_noscale  = sprite_v_double_noscale_c;

  1024.     dsp->sprite_v_double_onescale = sprite_v_double_onescale_c;

  1025.     dsp->sprite_v_double_twoscale = sprite_v_double_twoscale_c;

  1026. #endif /* CONFIG_WMV3IMAGE_DECODER || CONFIG_VC1IMAGE_DECODER */

  1027. 

  1028.     dsp->startcode_find_candidate = ff_startcode_find_candidate_c;

  1029. 

  1030.     if (ARCH_AARCH64)

  1031.         ff_vc1dsp_init_aarch64(dsp);

  1032.     if (ARCH_ARM)

  1033.         ff_vc1dsp_init_arm(dsp);

  1034.     if (ARCH_PPC)

  1035.         ff_vc1dsp_init_ppc(dsp);

  1036.     if (ARCH_X86)

  1037.         ff_vc1dsp_init_x86(dsp);

  1038. }