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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 Libav.

  6.  *

  7.  * Libav 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.  * Libav 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 Libav; 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/common.h"

  29. #include "h264chroma.h"

  30. #include "vc1dsp.h"

  31. 

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

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

  34. {

  35.     int i;

  36.     int a, b, c, d;

  37.     int d1, d2;

  38.     int rnd = 1;

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

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

  41.         b  = src[-stride];

  42.         c  = src[0];

  43.         d  = src[stride];

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

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

  46. 

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

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

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

  50.         src[stride]      = d + d1;

  51.         src++;

  52.         rnd = !rnd;

  53.     }

  54. }

  55. 

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

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

  58. {

  59.     int i;

  60.     int a, b, c, d;

  61.     int d1, d2;

  62.     int rnd = 1;

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

  64.         a  = src[-2];

  65.         b  = src[-1];

  66.         c  = src[0];

  67.         d  = src[1];

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

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

  70. 

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

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

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

  74.         src[1]  = d + d1;

  75.         src    += stride;

  76.         rnd     = !rnd;

  77.     }

  78. }

  79. 

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

  81. {

  82.     int i;

  83.     int a, b, c, d;

  84.     int d1, d2;

  85.     int rnd1 = 4, rnd2 = 3;

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

  87.         a  = top[48];

  88.         b  = top[56];

  89.         c  = bottom[0];

  90.         d  = bottom[8];

  91.         d1 = a - d;

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

  93. 

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

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

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

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

  98. 

  99.         bottom++;

  100.         top++;

  101.         rnd2 = 7 - rnd2;

  102.         rnd1 = 7 - rnd1;

  103.     }

  104. }

  105. 

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

  107. {

  108.     int i;

  109.     int a, b, c, d;

  110.     int d1, d2;

  111.     int rnd1 = 4, rnd2 = 3;

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

  113.         a  = left[6];

  114.         b  = left[7];

  115.         c  = right[0];

  116.         d  = right[1];

  117.         d1 = a - d;

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

  119. 

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

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

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

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

  124. 

  125.         right += 8;

  126.         left  += 8;

  127.         rnd2   = 7 - rnd2;

  128.         rnd1   = 7 - rnd1;

  129.     }

  130. }

  131. 

  132. /**

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

  134.  * @param src source block type

  135.  * @param stride block stride

  136.  * @param pq block quantizer

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

  138.  * @see 8.6

  139.  */

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

  141. {

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

  143.               5 * (src[-1 * stride] - src[0 * stride]) + 4) >> 3;

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

  145. 

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

  147.     if (a0 < pq) {

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

  149.                         5 * (src[-3 * stride] - src[-2 * stride]) + 4) >> 3);

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

  151.                         5 * (src[ 1 * stride] - src[ 2 * stride]) + 4) >> 3);

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

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

  154.             int clip_sign = clip >> 31;

  155. 

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

  157.             if (clip) {

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

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

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

  161. 

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

  163.                 d_sign ^= a0_sign;

  164. 

  165.                 if (d_sign ^ clip_sign)

  166.                     d = 0;

  167.                 else {

  168.                     d = FFMIN(d, clip);

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

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

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

  172.                 }

  173.                 return 1;

  174.             }

  175.         }

  176.     }

  177.     return 0;

  178. }

  179. 

  180. /**

  181.  * VC-1 in-loop deblocking filter

  182.  * @param src source block type

  183.  * @param step distance between horizontally adjacent elements

  184.  * @param stride distance between vertically adjacent elements

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

  186.  * @param pq block quantizer

  187.  * @see 8.6

  188.  */

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

  190.                                    int len, int pq)

  191. {

  192.     int i;

  193.     int filt3;

  194. 

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

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

  197.         if (filt3) {

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

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

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

  201.         }

  202.         src += step * 4;

  203.     }

  204. }

  205. 

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

  207. {

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

  209. }

  210. 

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

  212. {

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

  214. }

  215. 

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

  217. {

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

  219. }

  220. 

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

  222. {

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

  224. }

  225. 

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

  227. {

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

  229. }

  230. 

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

  232. {

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

  234. }

  235. 

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

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

  238. {

  239.     int i;

  240.     int dc = block[0];

  241. 

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

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

  244. 

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

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

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

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

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

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

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

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

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

  254.         dest += linesize;

  255.     }

  256. }

  257. 

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

  259. {

  260.     int i;

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

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

  263. 

  264.     src = block;

  265.     dst = temp;

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

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

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

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

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

  271. 

  272.         t5 = t1 + t3;

  273.         t6 = t2 + t4;

  274.         t7 = t2 - t4;

  275.         t8 = t1 - t3;

  276. 

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

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

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

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

  281. 

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

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

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

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

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

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

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

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

  290. 

  291.         src += 1;

  292.         dst += 8;

  293.     }

  294. 

  295.     src = temp;

  296.     dst = block;

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

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

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

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

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

  302. 

  303.         t5 = t1 + t3;

  304.         t6 = t2 + t4;

  305.         t7 = t2 - t4;

  306.         t8 = t1 - t3;

  307. 

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

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

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

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

  312. 

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

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

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

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

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

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

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

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

  321. 

  322.         src++;

  323.         dst++;

  324.     }

  325. }

  326. 

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

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

  329. {

  330.     int i;

  331.     int dc = block[0];

  332. 

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

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

  335. 

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

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

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

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

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

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

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

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

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

  345.         dest += linesize;

  346.     }

  347. }

  348. 

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

  350. {

  351.     int i;

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

  353.     int16_t *src, *dst;

  354. 

  355.     src = block;

  356.     dst = block;

  357. 

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

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

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

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

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

  363. 

  364.         t5 = t1 + t3;

  365.         t6 = t2 + t4;

  366.         t7 = t2 - t4;

  367.         t8 = t1 - t3;

  368. 

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

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

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

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

  373. 

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

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

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

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

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

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

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

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

  382. 

  383.         src += 8;

  384.         dst += 8;

  385.     }

  386. 

  387.     src = block;

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

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

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

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

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

  393. 

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

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

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

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

  398. 

  399.         src++;

  400.         dest++;

  401.     }

  402. }

  403. 

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

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

  406. {

  407.     int i;

  408.     int dc = block[0];

  409. 

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

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

  412. 

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

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

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

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

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

  418.         dest += linesize;

  419.     }

  420. }

  421. 

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

  423. {

  424.     int i;

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

  426.     int16_t *src, *dst;

  427. 

  428.     src = block;

  429.     dst = block;

  430. 

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

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

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

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

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

  436. 

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

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

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

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

  441. 

  442.         src += 8;

  443.         dst += 8;

  444.     }

  445. 

  446.     src = block;

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

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

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

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

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

  452. 

  453.         t5 = t1 + t3;

  454.         t6 = t2 + t4;

  455.         t7 = t2 - t4;

  456.         t8 = t1 - t3;

  457. 

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

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

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

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

  462. 

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

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

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

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

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

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

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

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

  471. 

  472.         src++;

  473.         dest++;

  474.     }

  475. }

  476. 

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

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

  479. {

  480.     int i;

  481.     int dc = block[0];

  482. 

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

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

  485. 

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

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

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

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

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

  491.         dest += linesize;

  492.     }

  493. }

  494. 

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

  496. {

  497.     int i;

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

  499.     int16_t *src, *dst;

  500. 

  501.     src = block;

  502.     dst = block;

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

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

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

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

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

  508. 

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

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

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

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

  513. 

  514.         src += 8;

  515.         dst += 8;

  516.     }

  517. 

  518.     src = block;

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

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

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

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

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

  524. 

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

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

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

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

  529. 

  530.         src++;

  531.         dest++;

  532.     }

  533. }

  534. 

  535. /* motion compensation functions */

  536. 

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

  538. #define VC1_MSPEL_FILTER_16B(DIR, TYPE)                                       \

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

  540.                                                                 int stride,   \

  541.                                                                 int mode)     \

  542. {                                                                             \

  543.     switch(mode) {                                                            \

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

  545.         return 0;                                                             \

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

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

  548.                18 * src[stride]  -  3 * src[stride * 2];                      \

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

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

  551.                 9 * src[stride]  -  1 * src[stride * 2];                      \

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

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

  554.                53 * src[stride]  -  4 * src[stride * 2];                      \

  555.     }                                                                         \

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

  557. }

  558. 

  559. VC1_MSPEL_FILTER_16B(ver, uint8_t)

  560. VC1_MSPEL_FILTER_16B(hor, int16_t)

  561. 

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

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

  564.                                              int mode, int r)

  565. {

  566.     switch (mode) {

  567.     case 0: // no shift

  568.         return src[0];

  569.     case 1: // 1/4 shift

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

  571.                 18 * src[stride]  -  3 * src[stride * 2] + 32 - r) >> 6;

  572.     case 2: // 1/2 shift

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

  574.                  9 * src[stride]  -  1 * src[stride * 2] + 8 - r) >> 4;

  575.     case 3: // 3/4 shift

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

  577.                 53 * src[stride]  -  4 * src[stride * 2] + 32 - r) >> 6;

  578.     }

  579.     return 0; // should not occur

  580. }

  581. 

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

  583. #define VC1_MSPEL_MC(OP, OPNAME)                                              \

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

  585.                                                     const uint8_t *src,       \

  586.                                                     int stride,               \

  587.                                                     int hmode,                \

  588.                                                     int vmode,                \

  589.                                                     int rnd)                  \

  590. {                                                                             \

  591.     int i, j;                                                                 \

  592.                                                                               \

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

  594.         int r;                                                                \

  595.                                                                               \

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

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

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

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

  600.                                                                               \

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

  602.                                                                               \

  603.             src -= 1;                                                         \

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

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

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

  607.                 src  += stride;                                               \

  608.                 tptr += 11;                                                   \

  609.             }                                                                 \

  610.                                                                               \

  611.             r    = 64 - rnd;                                                  \

  612.             tptr = tmp + 1;                                                   \

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

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

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

  616.                 dst  += stride;                                               \

  617.                 tptr += 11;                                                   \

  618.             }                                                                 \

  619.                                                                               \

  620.             return;                                                           \

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

  622.             r = 1 - rnd;                                                      \

  623.                                                                               \

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

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

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

  627.                 src += stride;                                                \

  628.                 dst += stride;                                                \

  629.             }                                                                 \

  630.             return;                                                           \

  631.         }                                                                     \

  632.     }                                                                         \

  633.                                                                               \

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

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

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

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

  638.         dst += stride;                                                        \

  639.         src += stride;                                                        \

  640.     }                                                                         \

  641. }

  642. 

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

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

  645. 

  646. VC1_MSPEL_MC(op_put, put_)

  647. VC1_MSPEL_MC(op_avg, avg_)

  648. 

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

  650. 

  651. #define PUT_VC1_MSPEL(a, b)                                                   \

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

  653.                                              const uint8_t *src,              \

  654.                                              ptrdiff_t stride, int rnd)       \

  655. {                                                                             \

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

  657. }                                                                             \

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

  659.                                              const uint8_t *src,              \

  660.                                              ptrdiff_t stride, int rnd)       \

  661. {                                                                             \

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

  663. }

  664. 

  665. PUT_VC1_MSPEL(1, 0)

  666. PUT_VC1_MSPEL(2, 0)

  667. PUT_VC1_MSPEL(3, 0)

  668. 

  669. PUT_VC1_MSPEL(0, 1)

  670. PUT_VC1_MSPEL(1, 1)

  671. PUT_VC1_MSPEL(2, 1)

  672. PUT_VC1_MSPEL(3, 1)

  673. 

  674. PUT_VC1_MSPEL(0, 2)

  675. PUT_VC1_MSPEL(1, 2)

  676. PUT_VC1_MSPEL(2, 2)

  677. PUT_VC1_MSPEL(3, 2)

  678. 

  679. PUT_VC1_MSPEL(0, 3)

  680. PUT_VC1_MSPEL(1, 3)

  681. PUT_VC1_MSPEL(2, 3)

  682. PUT_VC1_MSPEL(3, 3)

  683. 

  684. #define chroma_mc(a) \

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

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

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

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

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

  690. {

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

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

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

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

  695.     int i;

  696. 

  697.     assert(x < 8 && y < 8 && x >= 0 && y >= 0);

  698. 

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

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

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

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

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

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

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

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

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

  708.         dst += stride;

  709.         src += stride;

  710.     }

  711. }

  712. 

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

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

  715. {

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

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

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

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

  720.     int i;

  721. 

  722.     assert(x < 8 && y < 8 && x >= 0 && y >= 0);

  723. 

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

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

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

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

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

  729.         dst += stride;

  730.         src += stride;

  731.     }

  732. }

  733. 

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

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

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

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

  738. {

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

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

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

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

  743.     int i;

  744. 

  745.     assert(x < 8 && y < 8 && x >= 0 && y >= 0);

  746. 

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

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

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

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

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

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

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

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

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

  756.         dst += stride;

  757.         src += stride;

  758.     }

  759. }

  760. 

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

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

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

  764. {

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

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

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

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

  769.     int i;

  770. 

  771.     assert(x < 8 && y < 8 && x >= 0 && y >= 0);

  772. 

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

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

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

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

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

  778.         dst += stride;

  779.         src += stride;

  780.     }

  781. }

  782. 

  783. #if CONFIG_WMV3IMAGE_DECODER || CONFIG_VC1IMAGE_DECODER

  784. 

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

  786.                        int advance, int count)

  787. {

  788.     while (count--) {

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

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

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

  792.         offset += advance;

  793.     }

  794. }

  795. 

  796. static av_always_inline void sprite_v_template(uint8_t *dst,

  797.                                                const uint8_t *src1a,

  798.                                                const uint8_t *src1b,

  799.                                                int offset1,

  800.                                                int two_sprites,

  801.                                                const uint8_t *src2a,

  802.                                                const uint8_t *src2b,

  803.                                                int offset2,

  804.                                                int alpha, int scaled,

  805.                                                int width)

  806. {

  807.     int a1, b1, a2, b2;

  808.     while (width--) {

  809.         a1 = *src1a++;

  810.         if (scaled) {

  811.             b1 = *src1b++;

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

  813.         }

  814.         if (two_sprites) {

  815.             a2 = *src2a++;

  816.             if (scaled > 1) {

  817.                 b2 = *src2b++;

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

  819.             }

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

  821.         }

  822.         *dst++ = a1;

  823.     }

  824. }

  825. 

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

  827.                               const uint8_t *src1b,

  828.                               int offset, int width)

  829. {

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

  831. }

  832. 

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

  834.                                       const uint8_t *src2a,

  835.                                       int alpha, int width)

  836. {

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

  838. }

  839. 

  840. static void sprite_v_double_onescale_c(uint8_t *dst,

  841.                                        const uint8_t *src1a,

  842.                                        const uint8_t *src1b,

  843.                                        int offset1,

  844.                                        const uint8_t *src2a,

  845.                                        int alpha, int width)

  846. {

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

  848.                       width);

  849. }

  850. 

  851. static void sprite_v_double_twoscale_c(uint8_t *dst,

  852.                                        const uint8_t *src1a,

  853.                                        const uint8_t *src1b,

  854.                                        int offset1,

  855.                                        const uint8_t *src2a,

  856.                                        const uint8_t *src2b,

  857.                                        int offset2,

  858.                                        int alpha,

  859.                                        int width)

  860. {

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

  862.                       alpha, 2, width);

  863. }

  864. 

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

  866. 

  867. av_cold void ff_vc1dsp_init(VC1DSPContext *dsp)

  868. {

  869.     dsp->vc1_inv_trans_8x8    = vc1_inv_trans_8x8_c;

  870.     dsp->vc1_inv_trans_4x8    = vc1_inv_trans_4x8_c;

  871.     dsp->vc1_inv_trans_8x4    = vc1_inv_trans_8x4_c;

  872.     dsp->vc1_inv_trans_4x4    = vc1_inv_trans_4x4_c;

  873.     dsp->vc1_inv_trans_8x8_dc = vc1_inv_trans_8x8_dc_c;

  874.     dsp->vc1_inv_trans_4x8_dc = vc1_inv_trans_4x8_dc_c;

  875.     dsp->vc1_inv_trans_8x4_dc = vc1_inv_trans_8x4_dc_c;

  876.     dsp->vc1_inv_trans_4x4_dc = vc1_inv_trans_4x4_dc_c;

  877. 

  878.     dsp->vc1_h_overlap        = vc1_h_overlap_c;

  879.     dsp->vc1_v_overlap        = vc1_v_overlap_c;

  880.     dsp->vc1_h_s_overlap      = vc1_h_s_overlap_c;

  881.     dsp->vc1_v_s_overlap      = vc1_v_s_overlap_c;

  882. 

  883.     dsp->vc1_v_loop_filter4   = vc1_v_loop_filter4_c;

  884.     dsp->vc1_h_loop_filter4   = vc1_h_loop_filter4_c;

  885.     dsp->vc1_v_loop_filter8   = vc1_v_loop_filter8_c;

  886.     dsp->vc1_h_loop_filter8   = vc1_h_loop_filter8_c;

  887.     dsp->vc1_v_loop_filter16  = vc1_v_loop_filter16_c;

  888.     dsp->vc1_h_loop_filter16  = vc1_h_loop_filter16_c;

  889. 

  890.     dsp->put_vc1_mspel_pixels_tab[0]  = ff_put_pixels8x8_c;

  891.     dsp->put_vc1_mspel_pixels_tab[1]  = put_vc1_mspel_mc10_c;

  892.     dsp->put_vc1_mspel_pixels_tab[2]  = put_vc1_mspel_mc20_c;

  893.     dsp->put_vc1_mspel_pixels_tab[3]  = put_vc1_mspel_mc30_c;

  894.     dsp->put_vc1_mspel_pixels_tab[4]  = put_vc1_mspel_mc01_c;

  895.     dsp->put_vc1_mspel_pixels_tab[5]  = put_vc1_mspel_mc11_c;

  896.     dsp->put_vc1_mspel_pixels_tab[6]  = put_vc1_mspel_mc21_c;

  897.     dsp->put_vc1_mspel_pixels_tab[7]  = put_vc1_mspel_mc31_c;

  898.     dsp->put_vc1_mspel_pixels_tab[8]  = put_vc1_mspel_mc02_c;

  899.     dsp->put_vc1_mspel_pixels_tab[9]  = put_vc1_mspel_mc12_c;

  900.     dsp->put_vc1_mspel_pixels_tab[10] = put_vc1_mspel_mc22_c;

  901.     dsp->put_vc1_mspel_pixels_tab[11] = put_vc1_mspel_mc32_c;

  902.     dsp->put_vc1_mspel_pixels_tab[12] = put_vc1_mspel_mc03_c;

  903.     dsp->put_vc1_mspel_pixels_tab[13] = put_vc1_mspel_mc13_c;

  904.     dsp->put_vc1_mspel_pixels_tab[14] = put_vc1_mspel_mc23_c;

  905.     dsp->put_vc1_mspel_pixels_tab[15] = put_vc1_mspel_mc33_c;

  906. 

  907.     dsp->avg_vc1_mspel_pixels_tab[0]  = ff_avg_pixels8x8_c;

  908.     dsp->avg_vc1_mspel_pixels_tab[1]  = avg_vc1_mspel_mc10_c;

  909.     dsp->avg_vc1_mspel_pixels_tab[2]  = avg_vc1_mspel_mc20_c;

  910.     dsp->avg_vc1_mspel_pixels_tab[3]  = avg_vc1_mspel_mc30_c;

  911.     dsp->avg_vc1_mspel_pixels_tab[4]  = avg_vc1_mspel_mc01_c;

  912.     dsp->avg_vc1_mspel_pixels_tab[5]  = avg_vc1_mspel_mc11_c;

  913.     dsp->avg_vc1_mspel_pixels_tab[6]  = avg_vc1_mspel_mc21_c;

  914.     dsp->avg_vc1_mspel_pixels_tab[7]  = avg_vc1_mspel_mc31_c;

  915.     dsp->avg_vc1_mspel_pixels_tab[8]  = avg_vc1_mspel_mc02_c;

  916.     dsp->avg_vc1_mspel_pixels_tab[9]  = avg_vc1_mspel_mc12_c;

  917.     dsp->avg_vc1_mspel_pixels_tab[10] = avg_vc1_mspel_mc22_c;

  918.     dsp->avg_vc1_mspel_pixels_tab[11] = avg_vc1_mspel_mc32_c;

  919.     dsp->avg_vc1_mspel_pixels_tab[12] = avg_vc1_mspel_mc03_c;

  920.     dsp->avg_vc1_mspel_pixels_tab[13] = avg_vc1_mspel_mc13_c;

  921.     dsp->avg_vc1_mspel_pixels_tab[14] = avg_vc1_mspel_mc23_c;

  922.     dsp->avg_vc1_mspel_pixels_tab[15] = avg_vc1_mspel_mc33_c;

  923. 

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

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

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

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

  928. 

  929. #if CONFIG_WMV3IMAGE_DECODER || CONFIG_VC1IMAGE_DECODER

  930.     dsp->sprite_h                 = sprite_h_c;

  931.     dsp->sprite_v_single          = sprite_v_single_c;

  932.     dsp->sprite_v_double_noscale  = sprite_v_double_noscale_c;

  933.     dsp->sprite_v_double_onescale = sprite_v_double_onescale_c;

  934.     dsp->sprite_v_double_twoscale = sprite_v_double_twoscale_c;

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

  936. 

  937.     if (ARCH_AARCH64)

  938.         ff_vc1dsp_init_aarch64(dsp);

  939.     if (ARCH_ARM)

  940.         ff_vc1dsp_init_arm(dsp);

  941.     if (ARCH_PPC)

  942.         ff_vc1dsp_init_ppc(dsp);

  943.     if (ARCH_X86)

  944.         ff_vc1dsp_init_x86(dsp);

  945. }