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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 "vc1dsp.h"

  29. #include "libavutil/avassert.h"

  30. #include "libavutil/common.h"

  31. 

  32. 

  33. /** Apply overlap transform to horizontal edge

  34. */

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

  36. {

  37.     int i;

  38.     int a, b, c, d;

  39.     int d1, d2;

  40.     int rnd = 1;

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

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

  43.         b = src[-stride];

  44.         c = src[0];

  45.         d = src[stride];

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

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

  48. 

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

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

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

  52.         src[stride] = d + d1;

  53.         src++;

  54.         rnd = !rnd;

  55.     }

  56. }

  57. 

  58. /** Apply overlap transform to vertical edge

  59. */

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

  61. {

  62.     int i;

  63.     int a, b, c, d;

  64.     int d1, d2;

  65.     int rnd = 1;

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

  67.         a = src[-2];

  68.         b = src[-1];

  69.         c = src[0];

  70.         d = src[1];

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

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

  73. 

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

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

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

  77.         src[1] = d + d1;

  78.         src += stride;

  79.         rnd = !rnd;

  80.     }

  81. }

  82. 

  83. static void vc1_v_s_overlap_c(DCTELEM *top,  DCTELEM *bottom)

  84. {

  85.     int i;

  86.     int a, b, c, d;

  87.     int d1, d2;

  88.     int rnd1 = 4, rnd2 = 3;

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

  90.         a = top[48];

  91.         b = top[56];

  92.         c = bottom[0];

  93.         d = bottom[8];

  94.         d1 = a - d;

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

  96. 

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

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

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

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

  101. 

  102.         bottom++;

  103.         top++;

  104.         rnd2 = 7 - rnd2;

  105.         rnd1 = 7 - rnd1;

  106.     }

  107. }

  108. 

  109. static void vc1_h_s_overlap_c(DCTELEM *left, DCTELEM *right)

  110. {

  111.     int i;

  112.     int a, b, c, d;

  113.     int d1, d2;

  114.     int rnd1 = 4, rnd2 = 3;

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

  116.         a = left[6];

  117.         b = left[7];

  118.         c = right[0];

  119.         d = right[1];

  120.         d1 = a - d;

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

  122. 

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

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

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

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

  127. 

  128.         right += 8;

  129.         left += 8;

  130.         rnd2 = 7 - rnd2;

  131.         rnd1 = 7 - rnd1;

  132.     }

  133. }

  134. 

  135. /**

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

  137.  * @param src source block type

  138.  * @param stride block stride

  139.  * @param pq block quantizer

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

  141.  * @see 8.6

  142.  */

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

  144.     int a0 = (2*(src[-2*stride] - src[ 1*stride]) - 5*(src[-1*stride] - src[ 0*stride]) + 4) >> 3;

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

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

  149.         int a2 = FFABS((2*(src[ 0*stride] - src[ 3*stride]) - 5*(src[ 1*stride] - src[ 2*stride]) + 4) >> 3);

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

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

  152.             int clip_sign = clip >> 31;

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

  154.             if(clip){

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

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

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

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

  159.                 d_sign ^= a0_sign;

  160. 

  161.                 if( d_sign ^ clip_sign )

  162.                     d = 0;

  163.                 else{

  164.                     d = FFMIN(d, clip);

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

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

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

  168.                 }

  169.                 return 1;

  170.             }

  171.         }

  172.     }

  173.     return 0;

  174. }

  175. 

  176. /**

  177.  * VC-1 in-loop deblocking filter

  178.  * @param src source block type

  179.  * @param step distance between horizontally adjacent elements

  180.  * @param stride distance between vertically adjacent elements

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

  182.  * @param pq block quantizer

  183.  * @see 8.6

  184.  */

  185. static inline void vc1_loop_filter(uint8_t* src, int step, int stride, int len, int pq)

  186. {

  187.     int i;

  188.     int filt3;

  189. 

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

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

  192.         if(filt3){

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

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

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

  196.         }

  197.         src += step * 4;

  198.     }

  199. }

  200. 

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

  202. {

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

  204. }

  205. 

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

  207. {

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

  209. }

  210. 

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

  212. {

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

  214. }

  215. 

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

  217. {

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

  219. }

  220. 

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

  222. {

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

  224. }

  225. 

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

  227. {

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

  229. }

  230. 

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

  232. */

  233. static void vc1_inv_trans_8x8_dc_c(uint8_t *dest, int linesize, DCTELEM *block)

  234. {

  235.     int i;

  236.     int dc = block[0];

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

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

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

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

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

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

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

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

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

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

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

  248.         dest += linesize;

  249.     }

  250. }

  251. 

  252. static void vc1_inv_trans_8x8_c(DCTELEM block[64])

  253. {

  254.     int i;

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

  256.     DCTELEM *src, *dst, temp[64];

  257. 

  258.     src = block;

  259.     dst = temp;

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

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

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

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

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

  265. 

  266.         t5 = t1 + t3;

  267.         t6 = t2 + t4;

  268.         t7 = t2 - t4;

  269.         t8 = t1 - t3;

  270. 

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

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

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

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

  275. 

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

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

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

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

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

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

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

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

  284. 

  285.         src += 1;

  286.         dst += 8;

  287.     }

  288. 

  289.     src = temp;

  290.     dst = block;

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

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

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

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

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

  296. 

  297.         t5 = t1 + t3;

  298.         t6 = t2 + t4;

  299.         t7 = t2 - t4;

  300.         t8 = t1 - t3;

  301. 

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

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

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

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

  306. 

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

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

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

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

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

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

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

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

  315. 

  316.         src++;

  317.         dst++;

  318.     }

  319. }

  320. 

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

  322. */

  323. static void vc1_inv_trans_8x4_dc_c(uint8_t *dest, int linesize, DCTELEM *block)

  324. {

  325.     int i;

  326.     int dc = block[0];

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

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

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

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

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

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

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

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

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

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

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

  338.         dest += linesize;

  339.     }

  340. }

  341. 

  342. static void vc1_inv_trans_8x4_c(uint8_t *dest, int linesize, DCTELEM *block)

  343. {

  344.     int i;

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

  346.     DCTELEM *src, *dst;

  347. 

  348.     src = block;

  349.     dst = block;

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

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

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

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

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

  355. 

  356.         t5 = t1 + t3;

  357.         t6 = t2 + t4;

  358.         t7 = t2 - t4;

  359.         t8 = t1 - t3;

  360. 

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

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

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

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

  365. 

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

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

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

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

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

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

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

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

  374. 

  375.         src += 8;

  376.         dst += 8;

  377.     }

  378. 

  379.     src = block;

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

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

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

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

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

  385. 

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

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

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

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

  390. 

  391.         src ++;

  392.         dest++;

  393.     }

  394. }

  395. 

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

  397. */

  398. static void vc1_inv_trans_4x8_dc_c(uint8_t *dest, int linesize, DCTELEM *block)

  399. {

  400.     int i;

  401.     int dc = block[0];

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

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

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

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

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

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

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

  409.         dest += linesize;

  410.     }

  411. }

  412. 

  413. static void vc1_inv_trans_4x8_c(uint8_t *dest, int linesize, DCTELEM *block)

  414. {

  415.     int i;

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

  417.     DCTELEM *src, *dst;

  418. 

  419.     src = block;

  420.     dst = block;

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

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

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

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

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

  426. 

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

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

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

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

  431. 

  432.         src += 8;

  433.         dst += 8;

  434.     }

  435. 

  436.     src = block;

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

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

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

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

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

  442. 

  443.         t5 = t1 + t3;

  444.         t6 = t2 + t4;

  445.         t7 = t2 - t4;

  446.         t8 = t1 - t3;

  447. 

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

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

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

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

  452. 

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

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

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

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

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

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

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

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

  461. 

  462.         src ++;

  463.         dest++;

  464.     }

  465. }

  466. 

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

  468. */

  469. static void vc1_inv_trans_4x4_dc_c(uint8_t *dest, int linesize, DCTELEM *block)

  470. {

  471.     int i;

  472.     int dc = block[0];

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

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

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

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

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

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

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

  480.         dest += linesize;

  481.     }

  482. }

  483. 

  484. static void vc1_inv_trans_4x4_c(uint8_t *dest, int linesize, DCTELEM *block)

  485. {

  486.     int i;

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

  488.     DCTELEM *src, *dst;

  489. 

  490.     src = block;

  491.     dst = block;

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

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

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

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

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

  497. 

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

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

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

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

  502. 

  503.         src += 8;

  504.         dst += 8;

  505.     }

  506. 

  507.     src = block;

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

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

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

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

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

  513. 

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

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

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

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

  518. 

  519.         src ++;

  520.         dest++;

  521.     }

  522. }

  523. 

  524. /* motion compensation functions */

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

  526. #define VC1_MSPEL_FILTER_16B(DIR, TYPE)                                 \

  527. static av_always_inline int vc1_mspel_ ## DIR ## _filter_16bits(const TYPE *src, int stride, int mode) \

  528. {                                                                       \

  529.     switch(mode){                                                       \

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

  531.         return 0;                                                       \

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

  533.         return -4*src[-stride] + 53*src[0] + 18*src[stride] - 3*src[stride*2]; \

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

  535.         return -src[-stride] + 9*src[0] + 9*src[stride] - src[stride*2]; \

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

  537.         return -3*src[-stride] + 18*src[0] + 53*src[stride] - 4*src[stride*2]; \

  538.     }                                                                   \

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

  540. }

  541. 

  542. VC1_MSPEL_FILTER_16B(ver, uint8_t)

  543. VC1_MSPEL_FILTER_16B(hor, int16_t)

  544. 

  545. 

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

  547.  */

  548. static av_always_inline int vc1_mspel_filter(const uint8_t *src, int stride, int mode, int r)

  549. {

  550.     switch(mode){

  551.     case 0: //no shift

  552.         return src[0];

  553.     case 1: // 1/4 shift

  554.         return (-4*src[-stride] + 53*src[0] + 18*src[stride] - 3*src[stride*2] + 32 - r) >> 6;

  555.     case 2: // 1/2 shift

  556.         return (-src[-stride] + 9*src[0] + 9*src[stride] - src[stride*2] + 8 - r) >> 4;

  557.     case 3: // 3/4 shift

  558.         return (-3*src[-stride] + 18*src[0] + 53*src[stride] - 4*src[stride*2] + 32 - r) >> 6;

  559.     }

  560.     return 0; //should not occur

  561. }

  562. 

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

  564.  */

  565. #define VC1_MSPEL_MC(OP, OPNAME)\

  566. static av_always_inline void OPNAME ## vc1_mspel_mc(uint8_t *dst, const uint8_t *src, int stride, int hmode, int vmode, int rnd)\

  567. {\

  568.     int     i, j;\

  569. \

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

  571.         int r;\

  572. \

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

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

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

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

  577. \

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

  579. \

  580.             src -= 1;\

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

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

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

  584.                 src += stride;\

  585.                 tptr += 11;\

  586.             }\

  587. \

  588.             r = 64-rnd;\

  589.             tptr = tmp+1;\

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

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

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

  593.                 dst += stride;\

  594.                 tptr += 11;\

  595.             }\

  596. \

  597.             return;\

  598.         }\

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

  600.             r = 1-rnd;\

  601. \

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

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

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

  605.                 src += stride;\

  606.                 dst += stride;\

  607.             }\

  608.             return;\

  609.         }\

  610.     }\

  611. \

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

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

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

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

  616.         dst += stride;\

  617.         src += stride;\

  618.     }\

  619. }

  620. 

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

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

  623. 

  624. VC1_MSPEL_MC(op_put, put_)

  625. VC1_MSPEL_MC(op_avg, avg_)

  626. 

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

  628. 

  629. #define PUT_VC1_MSPEL(a, b)\

  630. static void put_vc1_mspel_mc ## a ## b ##_c(uint8_t *dst, const uint8_t *src, int stride, int rnd) { \

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

  632. }\

  633. static void avg_vc1_mspel_mc ## a ## b ##_c(uint8_t *dst, const uint8_t *src, int stride, int rnd) { \

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

  635. }

  636. 

  637. PUT_VC1_MSPEL(1, 0)

  638. PUT_VC1_MSPEL(2, 0)

  639. PUT_VC1_MSPEL(3, 0)

  640. 

  641. PUT_VC1_MSPEL(0, 1)

  642. PUT_VC1_MSPEL(1, 1)

  643. PUT_VC1_MSPEL(2, 1)

  644. PUT_VC1_MSPEL(3, 1)

  645. 

  646. PUT_VC1_MSPEL(0, 2)

  647. PUT_VC1_MSPEL(1, 2)

  648. PUT_VC1_MSPEL(2, 2)

  649. PUT_VC1_MSPEL(3, 2)

  650. 

  651. PUT_VC1_MSPEL(0, 3)

  652. PUT_VC1_MSPEL(1, 3)

  653. PUT_VC1_MSPEL(2, 3)

  654. PUT_VC1_MSPEL(3, 3)

  655. 

  656. static void put_no_rnd_vc1_chroma_mc8_c(uint8_t *dst/*align 8*/, uint8_t *src/*align 1*/, int stride, int h, int x, int y){

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

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

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

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

  661.     int i;

  662. 

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

  664. 

  665.     for(i=0; i<h; i++)

  666.     {

  667.         dst[0] = (A*src[0] + B*src[1] + C*src[stride+0] + D*src[stride+1] + 32 - 4) >> 6;

  668.         dst[1] = (A*src[1] + B*src[2] + C*src[stride+1] + D*src[stride+2] + 32 - 4) >> 6;

  669.         dst[2] = (A*src[2] + B*src[3] + C*src[stride+2] + D*src[stride+3] + 32 - 4) >> 6;

  670.         dst[3] = (A*src[3] + B*src[4] + C*src[stride+3] + D*src[stride+4] + 32 - 4) >> 6;

  671.         dst[4] = (A*src[4] + B*src[5] + C*src[stride+4] + D*src[stride+5] + 32 - 4) >> 6;

  672.         dst[5] = (A*src[5] + B*src[6] + C*src[stride+5] + D*src[stride+6] + 32 - 4) >> 6;

  673.         dst[6] = (A*src[6] + B*src[7] + C*src[stride+6] + D*src[stride+7] + 32 - 4) >> 6;

  674.         dst[7] = (A*src[7] + B*src[8] + C*src[stride+7] + D*src[stride+8] + 32 - 4) >> 6;

  675.         dst+= stride;

  676.         src+= stride;

  677.     }

  678. }

  679. 

  680. static void put_no_rnd_vc1_chroma_mc4_c(uint8_t *dst, uint8_t *src, int stride, int h, int x, int y){

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

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

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

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

  685.     int i;

  686. 

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

  688. 

  689.     for(i=0; i<h; i++)

  690.     {

  691.         dst[0] = (A*src[0] + B*src[1] + C*src[stride+0] + D*src[stride+1] + 32 - 4) >> 6;

  692.         dst[1] = (A*src[1] + B*src[2] + C*src[stride+1] + D*src[stride+2] + 32 - 4) >> 6;

  693.         dst[2] = (A*src[2] + B*src[3] + C*src[stride+2] + D*src[stride+3] + 32 - 4) >> 6;

  694.         dst[3] = (A*src[3] + B*src[4] + C*src[stride+3] + D*src[stride+4] + 32 - 4) >> 6;

  695.         dst+= stride;

  696.         src+= stride;

  697.     }

  698. }

  699. 

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

  701. static void avg_no_rnd_vc1_chroma_mc8_c(uint8_t *dst/*align 8*/, uint8_t *src/*align 1*/, int stride, int h, int x, int y){

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

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

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

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

  706.     int i;

  707. 

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

  709. 

  710.     for(i=0; i<h; i++)

  711.     {

  712.         dst[0] = avg2(dst[0], ((A*src[0] + B*src[1] + C*src[stride+0] + D*src[stride+1] + 32 - 4) >> 6));

  713.         dst[1] = avg2(dst[1], ((A*src[1] + B*src[2] + C*src[stride+1] + D*src[stride+2] + 32 - 4) >> 6));

  714.         dst[2] = avg2(dst[2], ((A*src[2] + B*src[3] + C*src[stride+2] + D*src[stride+3] + 32 - 4) >> 6));

  715.         dst[3] = avg2(dst[3], ((A*src[3] + B*src[4] + C*src[stride+3] + D*src[stride+4] + 32 - 4) >> 6));

  716.         dst[4] = avg2(dst[4], ((A*src[4] + B*src[5] + C*src[stride+4] + D*src[stride+5] + 32 - 4) >> 6));

  717.         dst[5] = avg2(dst[5], ((A*src[5] + B*src[6] + C*src[stride+5] + D*src[stride+6] + 32 - 4) >> 6));

  718.         dst[6] = avg2(dst[6], ((A*src[6] + B*src[7] + C*src[stride+6] + D*src[stride+7] + 32 - 4) >> 6));

  719.         dst[7] = avg2(dst[7], ((A*src[7] + B*src[8] + C*src[stride+7] + D*src[stride+8] + 32 - 4) >> 6));

  720.         dst+= stride;

  721.         src+= stride;

  722.     }

  723. }

  724. 

  725. #if CONFIG_WMV3IMAGE_DECODER || CONFIG_VC1IMAGE_DECODER

  726. 

  727. static void sprite_h_c(uint8_t *dst, const uint8_t *src, int offset, int advance, int count)

  728. {

  729.     while (count--) {

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

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

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

  733.         offset += advance;

  734.     }

  735. }

  736. 

  737. static av_always_inline void sprite_v_template(uint8_t *dst, const uint8_t *src1a, const uint8_t *src1b, int offset1,

  738.                                             int two_sprites, const uint8_t *src2a, const uint8_t *src2b, int offset2,

  739.                                             int alpha, int scaled, int width)

  740. {

  741.     int a1, b1, a2, b2;

  742.     while (width--) {

  743.         a1 = *src1a++;

  744.         if (scaled) {

  745.             b1 = *src1b++;

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

  747.         }

  748.         if (two_sprites) {

  749.             a2 = *src2a++;

  750.             if (scaled > 1) {

  751.                 b2 = *src2b++;

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

  753.             }

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

  755.         }

  756.         *dst++ = a1;

  757.     }

  758. }

  759. 

  760. static void sprite_v_single_c(uint8_t *dst, const uint8_t *src1a, const uint8_t *src1b, int offset, int width)

  761. {

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

  763. }

  764. 

  765. static void sprite_v_double_noscale_c(uint8_t *dst, const uint8_t *src1a, const uint8_t *src2a, int alpha, int width)

  766. {

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

  768. }

  769. 

  770. static void sprite_v_double_onescale_c(uint8_t *dst, const uint8_t *src1a, const uint8_t *src1b, int offset1,

  771.                                                      const uint8_t *src2a, int alpha, int width)

  772. {

  773.     sprite_v_template(dst, src1a, src1b, offset1, 1, src2a, NULL, 0, alpha, 1, width);

  774. }

  775. 

  776. static void sprite_v_double_twoscale_c(uint8_t *dst, const uint8_t *src1a, const uint8_t *src1b, int offset1,

  777.                                                      const uint8_t *src2a, const uint8_t *src2b, int offset2,

  778.                                        int alpha, int width)

  779. {

  780.     sprite_v_template(dst, src1a, src1b, offset1, 1, src2a, src2b, offset2, alpha, 2, width);

  781. }

  782. 

  783. #endif

  784. 

  785. av_cold void ff_vc1dsp_init(VC1DSPContext* dsp) {

  786.     dsp->vc1_inv_trans_8x8 = vc1_inv_trans_8x8_c;

  787.     dsp->vc1_inv_trans_4x8 = vc1_inv_trans_4x8_c;

  788.     dsp->vc1_inv_trans_8x4 = vc1_inv_trans_8x4_c;

  789.     dsp->vc1_inv_trans_4x4 = vc1_inv_trans_4x4_c;

  790.     dsp->vc1_inv_trans_8x8_dc = vc1_inv_trans_8x8_dc_c;

  791.     dsp->vc1_inv_trans_4x8_dc = vc1_inv_trans_4x8_dc_c;

  792.     dsp->vc1_inv_trans_8x4_dc = vc1_inv_trans_8x4_dc_c;

  793.     dsp->vc1_inv_trans_4x4_dc = vc1_inv_trans_4x4_dc_c;

  794.     dsp->vc1_h_overlap = vc1_h_overlap_c;

  795.     dsp->vc1_v_overlap = vc1_v_overlap_c;

  796.     dsp->vc1_h_s_overlap = vc1_h_s_overlap_c;

  797.     dsp->vc1_v_s_overlap = vc1_v_s_overlap_c;

  798.     dsp->vc1_v_loop_filter4 = vc1_v_loop_filter4_c;

  799.     dsp->vc1_h_loop_filter4 = vc1_h_loop_filter4_c;

  800.     dsp->vc1_v_loop_filter8 = vc1_v_loop_filter8_c;

  801.     dsp->vc1_h_loop_filter8 = vc1_h_loop_filter8_c;

  802.     dsp->vc1_v_loop_filter16 = vc1_v_loop_filter16_c;

  803.     dsp->vc1_h_loop_filter16 = vc1_h_loop_filter16_c;

  804. 

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  821. 

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  838. 

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

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

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

  842. 

  843. #if CONFIG_WMV3IMAGE_DECODER || CONFIG_VC1IMAGE_DECODER

  844.     dsp->sprite_h = sprite_h_c;

  845.     dsp->sprite_v_single = sprite_v_single_c;

  846.     dsp->sprite_v_double_noscale = sprite_v_double_noscale_c;

  847.     dsp->sprite_v_double_onescale = sprite_v_double_onescale_c;

  848.     dsp->sprite_v_double_twoscale = sprite_v_double_twoscale_c;

  849. #endif

  850. 

  851.     if (HAVE_ALTIVEC)

  852.         ff_vc1dsp_init_altivec(dsp);

  853.     if (HAVE_MMX)

  854.         ff_vc1dsp_init_mmx(dsp);

  855. }