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FFmpeg/libavcodec/dsputil.c

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  1. /*

  2.  * DSP utils

  3.  * Copyright (c) 2000, 2001 Gerard Lantau.

  4.  *

  5.  * This program is free software; you can redistribute it and/or modify

  6.  * it under the terms of the GNU General Public License as published by

  7.  * the Free Software Foundation; either version 2 of the License, or

  8.  * (at your option) any later version.

  9.  *

  10.  * This program is distributed in the hope that it will be useful,

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

  12.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

  13.  * GNU General Public License for more details.

  14.  *

  15.  * You should have received a copy of the GNU General Public License

  16.  * along with this program; if not, write to the Free Software

  17.  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.

  18.  */

  19. #include <stdlib.h>

  20. #include <stdio.h>

  21. #include <math.h>

  22. #include "avcodec.h"

  23. #include "dsputil.h"

  24. #include "simple_idct.h"

  25. 

  26. void (*ff_idct)(DCTELEM *block);

  27. void (*get_pixels)(DCTELEM *block, const UINT8 *pixels, int line_size);

  28. void (*put_pixels_clamped)(const DCTELEM *block, UINT8 *pixels, int line_size);

  29. void (*add_pixels_clamped)(const DCTELEM *block, UINT8 *pixels, int line_size);

  30. void (*gmc1)(UINT8 *dst, UINT8 *src, int srcStride, int h, int x16, int y16, int rounder);

  31. 

  32. op_pixels_abs_func pix_abs16x16;

  33. op_pixels_abs_func pix_abs16x16_x2;

  34. op_pixels_abs_func pix_abs16x16_y2;

  35. op_pixels_abs_func pix_abs16x16_xy2;

  36. 

  37. UINT8 cropTbl[256 + 2 * MAX_NEG_CROP];

  38. UINT32 squareTbl[512];

  39. 

  40. extern UINT16 default_intra_matrix[64];

  41. extern UINT16 default_non_intra_matrix[64];

  42. 

  43. UINT8 zigzag_direct[64] = {

  44.     0, 1, 8, 16, 9, 2, 3, 10,

  45.     17, 24, 32, 25, 18, 11, 4, 5,

  46.     12, 19, 26, 33, 40, 48, 41, 34,

  47.     27, 20, 13, 6, 7, 14, 21, 28,

  48.     35, 42, 49, 56, 57, 50, 43, 36,

  49.     29, 22, 15, 23, 30, 37, 44, 51,

  50.     58, 59, 52, 45, 38, 31, 39, 46,

  51.     53, 60, 61, 54, 47, 55, 62, 63

  52. };

  53. 

  54. /* not permutated inverse zigzag_direct + 1 for MMX quantizer */

  55. UINT16 __align8 inv_zigzag_direct16[64];

  56. 

  57. /* not permutated zigzag_direct for MMX quantizer */

  58. UINT8 zigzag_direct_noperm[64];

  59. 

  60. UINT8 ff_alternate_horizontal_scan[64] = {

  61.     0,  1,  2,  3,  8,  9, 16, 17, 

  62.     10, 11,  4,  5,  6,  7, 15, 14,

  63.     13, 12, 19, 18, 24, 25, 32, 33, 

  64.     26, 27, 20, 21, 22, 23, 28, 29,

  65.     30, 31, 34, 35, 40, 41, 48, 49, 

  66.     42, 43, 36, 37, 38, 39, 44, 45,

  67.     46, 47, 50, 51, 56, 57, 58, 59, 

  68.     52, 53, 54, 55, 60, 61, 62, 63,

  69. };

  70. 

  71. UINT8 ff_alternate_vertical_scan[64] = {

  72.     0,  8, 16, 24,  1,  9,  2, 10, 

  73.     17, 25, 32, 40, 48, 56, 57, 49,

  74.     41, 33, 26, 18,  3, 11,  4, 12, 

  75.     19, 27, 34, 42, 50, 58, 35, 43,

  76.     51, 59, 20, 28,  5, 13,  6, 14, 

  77.     21, 29, 36, 44, 52, 60, 37, 45,

  78.     53, 61, 22, 30,  7, 15, 23, 31, 

  79.     38, 46, 54, 62, 39, 47, 55, 63,

  80. };

  81. 

  82. /* Input permutation for the simple_idct_mmx */

  83. static UINT8 simple_mmx_permutation[64]={

  84. 	0x00, 0x08, 0x04, 0x09, 0x01, 0x0C, 0x05, 0x0D, 

  85. 	0x10, 0x18, 0x14, 0x19, 0x11, 0x1C, 0x15, 0x1D, 

  86. 	0x20, 0x28, 0x24, 0x29, 0x21, 0x2C, 0x25, 0x2D, 

  87. 	0x12, 0x1A, 0x16, 0x1B, 0x13, 0x1E, 0x17, 0x1F, 

  88. 	0x02, 0x0A, 0x06, 0x0B, 0x03, 0x0E, 0x07, 0x0F, 

  89. 	0x30, 0x38, 0x34, 0x39, 0x31, 0x3C, 0x35, 0x3D, 

  90. 	0x22, 0x2A, 0x26, 0x2B, 0x23, 0x2E, 0x27, 0x2F, 

  91. 	0x32, 0x3A, 0x36, 0x3B, 0x33, 0x3E, 0x37, 0x3F,

  92. };

  93. 

  94. /* a*inverse[b]>>32 == a/b for all 0<=a<=65536 && 2<=b<=255 */

  95. UINT32 inverse[256]={

  96.          0, 4294967295U,2147483648U,1431655766, 1073741824,  858993460,  715827883,  613566757, 

  97.  536870912,  477218589,  429496730,  390451573,  357913942,  330382100,  306783379,  286331154, 

  98.  268435456,  252645136,  238609295,  226050911,  214748365,  204522253,  195225787,  186737709, 

  99.  178956971,  171798692,  165191050,  159072863,  153391690,  148102321,  143165577,  138547333, 

  100.  134217728,  130150525,  126322568,  122713352,  119304648,  116080198,  113025456,  110127367, 

  101.  107374183,  104755300,  102261127,   99882961,   97612894,   95443718,   93368855,   91382283, 

  102.   89478486,   87652394,   85899346,   84215046,   82595525,   81037119,   79536432,   78090315, 

  103.   76695845,   75350304,   74051161,   72796056,   71582789,   70409300,   69273667,   68174085, 

  104.   67108864,   66076420,   65075263,   64103990,   63161284,   62245903,   61356676,   60492498, 

  105.   59652324,   58835169,   58040099,   57266231,   56512728,   55778797,   55063684,   54366675, 

  106.   53687092,   53024288,   52377650,   51746594,   51130564,   50529028,   49941481,   49367441, 

  107.   48806447,   48258060,   47721859,   47197443,   46684428,   46182445,   45691142,   45210183, 

  108.   44739243,   44278014,   43826197,   43383509,   42949673,   42524429,   42107523,   41698712, 

  109.   41297763,   40904451,   40518560,   40139882,   39768216,   39403370,   39045158,   38693400, 

  110.   38347923,   38008561,   37675152,   37347542,   37025581,   36709123,   36398028,   36092163, 

  111.   35791395,   35495598,   35204650,   34918434,   34636834,   34359739,   34087043,   33818641, 

  112.   33554432,   33294321,   33038210,   32786010,   32537632,   32292988,   32051995,   31814573, 

  113.   31580642,   31350127,   31122952,   30899046,   30678338,   30460761,   30246249,   30034737, 

  114.   29826162,   29620465,   29417585,   29217465,   29020050,   28825284,   28633116,   28443493, 

  115.   28256364,   28071682,   27889399,   27709467,   27531842,   27356480,   27183338,   27012373, 

  116.   26843546,   26676816,   26512144,   26349493,   26188825,   26030105,   25873297,   25718368, 

  117.   25565282,   25414008,   25264514,   25116768,   24970741,   24826401,   24683721,   24542671, 

  118.   24403224,   24265352,   24129030,   23994231,   23860930,   23729102,   23598722,   23469767, 

  119.   23342214,   23216040,   23091223,   22967740,   22845571,   22724695,   22605092,   22486740, 

  120.   22369622,   22253717,   22139007,   22025474,   21913099,   21801865,   21691755,   21582751, 

  121.   21474837,   21367997,   21262215,   21157475,   21053762,   20951060,   20849356,   20748635, 

  122.   20648882,   20550083,   20452226,   20355296,   20259280,   20164166,   20069941,   19976593, 

  123.   19884108,   19792477,   19701685,   19611723,   19522579,   19434242,   19346700,   19259944, 

  124.   19173962,   19088744,   19004281,   18920561,   18837576,   18755316,   18673771,   18592933, 

  125.   18512791,   18433337,   18354562,   18276457,   18199014,   18122225,   18046082,   17970575, 

  126.   17895698,   17821442,   17747799,   17674763,   17602325,   17530479,   17459217,   17388532, 

  127.   17318417,   17248865,   17179870,   17111424,   17043522,   16976156,   16909321,   16843010,

  128. };

  129. 

  130. /* used to skip zeros at the end */

  131. UINT8 zigzag_end[64];

  132. 

  133. UINT8 permutation[64];

  134. //UINT8 invPermutation[64];

  135. 

  136. static void build_zigzag_end()

  137. {

  138.     int lastIndex;

  139.     int lastIndexAfterPerm=0;

  140.     for(lastIndex=0; lastIndex<64; lastIndex++)

  141.     {

  142.         if(zigzag_direct[lastIndex] > lastIndexAfterPerm) 

  143.             lastIndexAfterPerm= zigzag_direct[lastIndex];

  144.         zigzag_end[lastIndex]= lastIndexAfterPerm + 1;

  145.     }

  146. }

  147. 

  148. void get_pixels_c(DCTELEM *block, const UINT8 *pixels, int line_size)

  149. {

  150.     DCTELEM *p;

  151.     const UINT8 *pix;

  152.     int i;

  153. 

  154.     /* read the pixels */

  155.     p = block;

  156.     pix = pixels;

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

  158.         p[0] = pix[0];

  159.         p[1] = pix[1];

  160.         p[2] = pix[2];

  161.         p[3] = pix[3];

  162.         p[4] = pix[4];

  163.         p[5] = pix[5];

  164.         p[6] = pix[6];

  165.         p[7] = pix[7];

  166.         pix += line_size;

  167.         p += 8;

  168.     }

  169. }

  170. 

  171. void put_pixels_clamped_c(const DCTELEM *block, UINT8 *pixels, int line_size)

  172. {

  173.     const DCTELEM *p;

  174.     UINT8 *pix;

  175.     int i;

  176.     UINT8 *cm = cropTbl + MAX_NEG_CROP;

  177.     

  178.     /* read the pixels */

  179.     p = block;

  180.     pix = pixels;

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

  182.         pix[0] = cm[p[0]];

  183.         pix[1] = cm[p[1]];

  184.         pix[2] = cm[p[2]];

  185.         pix[3] = cm[p[3]];

  186.         pix[4] = cm[p[4]];

  187.         pix[5] = cm[p[5]];

  188.         pix[6] = cm[p[6]];

  189.         pix[7] = cm[p[7]];

  190.         pix += line_size;

  191.         p += 8;

  192.     }

  193. }

  194. 

  195. void add_pixels_clamped_c(const DCTELEM *block, UINT8 *pixels, int line_size)

  196. {

  197.     const DCTELEM *p;

  198.     UINT8 *pix;

  199.     int i;

  200.     UINT8 *cm = cropTbl + MAX_NEG_CROP;

  201.     

  202.     /* read the pixels */

  203.     p = block;

  204.     pix = pixels;

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

  206.         pix[0] = cm[pix[0] + p[0]];

  207.         pix[1] = cm[pix[1] + p[1]];

  208.         pix[2] = cm[pix[2] + p[2]];

  209.         pix[3] = cm[pix[3] + p[3]];

  210.         pix[4] = cm[pix[4] + p[4]];

  211.         pix[5] = cm[pix[5] + p[5]];

  212.         pix[6] = cm[pix[6] + p[6]];

  213.         pix[7] = cm[pix[7] + p[7]];

  214.         pix += line_size;

  215.         p += 8;

  216.     }

  217. }

  218. 

  219. #define PIXOP(BTYPE, OPNAME, OP, INCR)                                                   \

  220.                                                                                          \

  221. static void OPNAME ## _pixels(BTYPE *block, const UINT8 *pixels, int line_size, int h)    \

  222. {                                                                                        \

  223.     BTYPE *p;                                                                            \

  224.     const UINT8 *pix;                                                                    \

  225.                                                                                          \

  226.     p = block;                                                                           \

  227.     pix = pixels;                                                                        \

  228.     do {                                                                                 \

  229.         OP(p[0], pix[0]);                                                                  \

  230.         OP(p[1], pix[1]);                                                                  \

  231.         OP(p[2], pix[2]);                                                                  \

  232.         OP(p[3], pix[3]);                                                                  \

  233.         OP(p[4], pix[4]);                                                                  \

  234.         OP(p[5], pix[5]);                                                                  \

  235.         OP(p[6], pix[6]);                                                                  \

  236.         OP(p[7], pix[7]);                                                                  \

  237.         pix += line_size;                                                                \

  238.         p += INCR;                                                                       \

  239.     } while (--h);;                                                                       \

  240. }                                                                                        \

  241.                                                                                          \

  242. static void OPNAME ## _pixels_x2(BTYPE *block, const UINT8 *pixels, int line_size, int h)     \

  243. {                                                                                        \

  244.     BTYPE *p;                                                                          \

  245.     const UINT8 *pix;                                                                    \

  246.                                                                                          \

  247.     p = block;                                                                           \

  248.     pix = pixels;                                                                        \

  249.     do {                                                                   \

  250.         OP(p[0], avg2(pix[0], pix[1]));                                                    \

  251.         OP(p[1], avg2(pix[1], pix[2]));                                                    \

  252.         OP(p[2], avg2(pix[2], pix[3]));                                                    \

  253.         OP(p[3], avg2(pix[3], pix[4]));                                                    \

  254.         OP(p[4], avg2(pix[4], pix[5]));                                                    \

  255.         OP(p[5], avg2(pix[5], pix[6]));                                                    \

  256.         OP(p[6], avg2(pix[6], pix[7]));                                                    \

  257.         OP(p[7], avg2(pix[7], pix[8]));                                                    \

  258.         pix += line_size;                                                                \

  259.         p += INCR;                                                                       \

  260.     } while (--h);                                                                        \

  261. }                                                                                        \

  262.                                                                                          \

  263. static void OPNAME ## _pixels_y2(BTYPE *block, const UINT8 *pixels, int line_size, int h)     \

  264. {                                                                                        \

  265.     BTYPE *p;                                                                          \

  266.     const UINT8 *pix;                                                                    \

  267.     const UINT8 *pix1;                                                                   \

  268.                                                                                          \

  269.     p = block;                                                                           \

  270.     pix = pixels;                                                                        \

  271.     pix1 = pixels + line_size;                                                           \

  272.     do {                                                                                 \

  273.         OP(p[0], avg2(pix[0], pix1[0]));                                                   \

  274.         OP(p[1], avg2(pix[1], pix1[1]));                                                   \

  275.         OP(p[2], avg2(pix[2], pix1[2]));                                                   \

  276.         OP(p[3], avg2(pix[3], pix1[3]));                                                   \

  277.         OP(p[4], avg2(pix[4], pix1[4]));                                                   \

  278.         OP(p[5], avg2(pix[5], pix1[5]));                                                   \

  279.         OP(p[6], avg2(pix[6], pix1[6]));                                                   \

  280.         OP(p[7], avg2(pix[7], pix1[7]));                                                   \

  281.         pix += line_size;                                                                \

  282.         pix1 += line_size;                                                               \

  283.         p += INCR;                                                                       \

  284.     } while(--h);                                                                         \

  285. }                                                                                        \

  286.                                                                                          \

  287. static void OPNAME ## _pixels_xy2(BTYPE *block, const UINT8 *pixels, int line_size, int h)    \

  288. {                                                                                        \

  289.     BTYPE *p;                                                                          \

  290.     const UINT8 *pix;                                                                    \

  291.     const UINT8 *pix1;                                                                   \

  292.                                                                                          \

  293.     p = block;                                                                           \

  294.     pix = pixels;                                                                        \

  295.     pix1 = pixels + line_size;                                                           \

  296.     do {                                                                   \

  297.         OP(p[0], avg4(pix[0], pix[1], pix1[0], pix1[1]));                                  \

  298.         OP(p[1], avg4(pix[1], pix[2], pix1[1], pix1[2]));                                  \

  299.         OP(p[2], avg4(pix[2], pix[3], pix1[2], pix1[3]));                                  \

  300.         OP(p[3], avg4(pix[3], pix[4], pix1[3], pix1[4]));                                  \

  301.         OP(p[4], avg4(pix[4], pix[5], pix1[4], pix1[5]));                                  \

  302.         OP(p[5], avg4(pix[5], pix[6], pix1[5], pix1[6]));                                  \

  303.         OP(p[6], avg4(pix[6], pix[7], pix1[6], pix1[7]));                                  \

  304.         OP(p[7], avg4(pix[7], pix[8], pix1[7], pix1[8]));                                  \

  305.         pix += line_size;                                                                \

  306.         pix1 += line_size;                                                               \

  307.         p += INCR;                                                                       \

  308.     } while(--h);                                                                         \

  309. }                                                                                        \

  310.                                                                                          \

  311. void (*OPNAME ## _pixels_tab[4])(BTYPE *block, const UINT8 *pixels, int line_size, int h) = { \

  312.     OPNAME ## _pixels,                                                                   \

  313.     OPNAME ## _pixels_x2,                                                                \

  314.     OPNAME ## _pixels_y2,                                                                \

  315.     OPNAME ## _pixels_xy2,                                                               \

  316. };

  317. 

  318. 

  319. /* rounding primitives */

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

  321. #define avg4(a,b,c,d) ((a+b+c+d+2)>>2)

  322. 

  323. #define op_put(a, b) a = b

  324. #define op_avg(a, b) a = avg2(a, b)

  325. #define op_sub(a, b) a -= b

  326. 

  327. PIXOP(UINT8, put, op_put, line_size)

  328. PIXOP(UINT8, avg, op_avg, line_size)

  329. 

  330. PIXOP(DCTELEM, sub, op_sub, 8)

  331. 

  332. /* not rounding primitives */

  333. #undef avg2

  334. #undef avg4

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

  336. #define avg4(a,b,c,d) ((a+b+c+d+1)>>2)

  337. 

  338. PIXOP(UINT8, put_no_rnd, op_put, line_size)

  339. PIXOP(UINT8, avg_no_rnd, op_avg, line_size)

  340. 

  341. /* motion estimation */

  342. 

  343. #undef avg2

  344. #undef avg4

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

  346. #define avg4(a,b,c,d) ((a+b+c+d+2)>>2)

  347. 

  348. static void gmc1_c(UINT8 *dst, UINT8 *src, int srcStride, int h, int x16, int y16, int rounder)

  349. {

  350.     const int A=(16-x16)*(16-y16);

  351.     const int B=(   x16)*(16-y16);

  352.     const int C=(16-x16)*(   y16);

  353.     const int D=(   x16)*(   y16);

  354.     int i;

  355.     rounder= 128 - rounder;

  356. 

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

  358.     {

  359.         dst[0]= (A*src[0] + B*src[1] + C*src[srcStride+0] + D*src[srcStride+1] + rounder)>>8;

  360.         dst[1]= (A*src[1] + B*src[2] + C*src[srcStride+1] + D*src[srcStride+2] + rounder)>>8;

  361.         dst[2]= (A*src[2] + B*src[3] + C*src[srcStride+2] + D*src[srcStride+3] + rounder)>>8;

  362.         dst[3]= (A*src[3] + B*src[4] + C*src[srcStride+3] + D*src[srcStride+4] + rounder)>>8;

  363.         dst[4]= (A*src[4] + B*src[5] + C*src[srcStride+4] + D*src[srcStride+5] + rounder)>>8;

  364.         dst[5]= (A*src[5] + B*src[6] + C*src[srcStride+5] + D*src[srcStride+6] + rounder)>>8;

  365.         dst[6]= (A*src[6] + B*src[7] + C*src[srcStride+6] + D*src[srcStride+7] + rounder)>>8;

  366.         dst[7]= (A*src[7] + B*src[8] + C*src[srcStride+7] + D*src[srcStride+8] + rounder)>>8;

  367.         dst+= srcStride;

  368.         src+= srcStride;

  369.     }

  370. }

  371. 

  372. static void qpel_h_lowpass(UINT8 *dst, UINT8 *src, int dstStride, int srcStride, int h, int r)

  373. {

  374.     UINT8 *cm = cropTbl + MAX_NEG_CROP;

  375.     int i;

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

  377.     {

  378.         dst[0]= cm[(((src[0]+src[1])*160 - (src[0]+src[2])*48 + (src[1]+src[3])*24 - (src[2]+src[4])*8 + r)>>8)];

  379.         dst[1]= cm[(((src[1]+src[2])*160 - (src[0]+src[3])*48 + (src[0]+src[4])*24 - (src[1]+src[5])*8 + r)>>8)];

  380.         dst[2]= cm[(((src[2]+src[3])*160 - (src[1]+src[4])*48 + (src[0]+src[5])*24 - (src[0]+src[6])*8 + r)>>8)];

  381.         dst[3]= cm[(((src[3]+src[4])*160 - (src[2]+src[5])*48 + (src[1]+src[6])*24 - (src[0]+src[7])*8 + r)>>8)];

  382.         dst[4]= cm[(((src[4]+src[5])*160 - (src[3]+src[6])*48 + (src[2]+src[7])*24 - (src[1]+src[8])*8 + r)>>8)];

  383.         dst[5]= cm[(((src[5]+src[6])*160 - (src[4]+src[7])*48 + (src[3]+src[8])*24 - (src[2]+src[8])*8 + r)>>8)];

  384.         dst[6]= cm[(((src[6]+src[7])*160 - (src[5]+src[8])*48 + (src[4]+src[8])*24 - (src[3]+src[7])*8 + r)>>8)];

  385.         dst[7]= cm[(((src[7]+src[8])*160 - (src[6]+src[8])*48 + (src[5]+src[7])*24 - (src[4]+src[6])*8 + r)>>8)];

  386.         dst+=dstStride;

  387.         src+=srcStride;

  388.     }

  389. }

  390. 

  391. static void qpel_v_lowpass(UINT8 *dst, UINT8 *src, int dstStride, int srcStride, int w, int r)

  392. {

  393.     UINT8 *cm = cropTbl + MAX_NEG_CROP;

  394.     int i;

  395.     for(i=0; i<w; i++)

  396.     {

  397.         const int src0= src[0*srcStride];

  398.         const int src1= src[1*srcStride];

  399.         const int src2= src[2*srcStride];

  400.         const int src3= src[3*srcStride];

  401.         const int src4= src[4*srcStride];

  402.         const int src5= src[5*srcStride];

  403.         const int src6= src[6*srcStride];

  404.         const int src7= src[7*srcStride];

  405.         const int src8= src[8*srcStride];

  406.         dst[0*dstStride]= cm[(((src0+src1)*160 - (src0+src2)*48 + (src1+src3)*24 - (src2+src4)*8 + r)>>8)];

  407.         dst[1*dstStride]= cm[(((src1+src2)*160 - (src0+src3)*48 + (src0+src4)*24 - (src1+src5)*8 + r)>>8)];

  408.         dst[2*dstStride]= cm[(((src2+src3)*160 - (src1+src4)*48 + (src0+src5)*24 - (src0+src6)*8 + r)>>8)];

  409.         dst[3*dstStride]= cm[(((src3+src4)*160 - (src2+src5)*48 + (src1+src6)*24 - (src0+src7)*8 + r)>>8)];

  410.         dst[4*dstStride]= cm[(((src4+src5)*160 - (src3+src6)*48 + (src2+src7)*24 - (src1+src8)*8 + r)>>8)];

  411.         dst[5*dstStride]= cm[(((src5+src6)*160 - (src4+src7)*48 + (src3+src8)*24 - (src2+src8)*8 + r)>>8)];

  412.         dst[6*dstStride]= cm[(((src6+src7)*160 - (src5+src8)*48 + (src4+src8)*24 - (src3+src7)*8 + r)>>8)];

  413.         dst[7*dstStride]= cm[(((src7+src8)*160 - (src6+src8)*48 + (src5+src7)*24 - (src4+src6)*8 + r)>>8)];

  414.         dst++;

  415.         src++;

  416.     }

  417. }

  418. 

  419. static inline void put_block(UINT8 *dst, UINT8 *src, int dstStride, int srcStride)

  420. {

  421.     int i;

  422.     for(i=0; i<8; i++)

  423.     {

  424.         dst[0]= src[0];

  425.         dst[1]= src[1];

  426.         dst[2]= src[2];

  427.         dst[3]= src[3];

  428.         dst[4]= src[4];

  429.         dst[5]= src[5];

  430.         dst[6]= src[6];

  431.         dst[7]= src[7];

  432.         dst+=dstStride;

  433.         src+=srcStride;

  434.     }

  435. }

  436. 

  437. static inline void avg2_block(UINT8 *dst, UINT8 *src1, UINT8 *src2, int dstStride, int srcStride, int r)

  438. {

  439.     int i;

  440.     for(i=0; i<8; i++)

  441.     {

  442.         dst[0]= (src1[0] + src2[0] + r)>>1;

  443.         dst[1]= (src1[1] + src2[1] + r)>>1;

  444.         dst[2]= (src1[2] + src2[2] + r)>>1;

  445.         dst[3]= (src1[3] + src2[3] + r)>>1;

  446.         dst[4]= (src1[4] + src2[4] + r)>>1;

  447.         dst[5]= (src1[5] + src2[5] + r)>>1;

  448.         dst[6]= (src1[6] + src2[6] + r)>>1;

  449.         dst[7]= (src1[7] + src2[7] + r)>>1;

  450.         dst+=dstStride;

  451.         src1+=srcStride;

  452.         src2+=8;

  453.     }

  454. }

  455. 

  456. static inline void avg4_block(UINT8 *dst, UINT8 *src1, UINT8 *src2, UINT8 *src3, UINT8 *src4, int dstStride, int srcStride, int r)

  457. {

  458.     int i;

  459.     for(i=0; i<8; i++)

  460.     {

  461.         dst[0]= (src1[0] + src2[0] + src3[0] + src4[0] + r)>>2;

  462.         dst[1]= (src1[1] + src2[1] + src3[1] + src4[1] + r)>>2;

  463.         dst[2]= (src1[2] + src2[2] + src3[2] + src4[2] + r)>>2;

  464.         dst[3]= (src1[3] + src2[3] + src3[3] + src4[3] + r)>>2;

  465.         dst[4]= (src1[4] + src2[4] + src3[4] + src4[4] + r)>>2;

  466.         dst[5]= (src1[5] + src2[5] + src3[5] + src4[5] + r)>>2;

  467.         dst[6]= (src1[6] + src2[6] + src3[6] + src4[6] + r)>>2;

  468.         dst[7]= (src1[7] + src2[7] + src3[7] + src4[7] + r)>>2;

  469.         dst+=dstStride;

  470.         src1+=srcStride;

  471.         src2+=8;

  472.         src3+=9;

  473.         src4+=8;

  474.     }

  475. }

  476. 

  477. #define QPEL_MC(r, name) \

  478. static void qpel_mc00_c ## name (UINT8 *dst, UINT8 *src, int dstStride, int srcStride, int mx, int my)\

  479. {\

  480.     put_block(dst, src, dstStride, srcStride);\

  481. }\

  482. \

  483. static void qpel_mc10_c ## name (UINT8 *dst, UINT8 *src, int dstStride, int srcStride, int mx, int my)\

  484. {\

  485.     UINT8 half[64];\

  486.     qpel_h_lowpass(half, src, 8, srcStride, 8, 128-r);\

  487.     avg2_block(dst, src, half, dstStride, srcStride, 1-r);\

  488. }\

  489. \

  490. static void qpel_mc20_c ## name (UINT8 *dst, UINT8 *src, int dstStride, int srcStride, int mx, int my)\

  491. {\

  492.     qpel_h_lowpass(dst, src, dstStride, srcStride, 8, 128-r);\

  493. }\

  494. \

  495. static void qpel_mc30_c ## name (UINT8 *dst, UINT8 *src, int dstStride, int srcStride, int mx, int my)\

  496. {\

  497.     UINT8 half[64];\

  498.     qpel_h_lowpass(half, src, 8, srcStride, 8, 128-r);\

  499.     avg2_block(dst, src+1, half, dstStride, srcStride, 1-r);\

  500. }\

  501. \

  502. static void qpel_mc01_c ## name (UINT8 *dst, UINT8 *src, int dstStride, int srcStride, int mx, int my)\

  503. {\

  504.     UINT8 half[64];\

  505.     qpel_v_lowpass(half, src, 8, srcStride, 8, 128-r);\

  506.     avg2_block(dst, src, half, dstStride, srcStride, 1-r);\

  507. }\

  508. \

  509. static void qpel_mc02_c ## name (UINT8 *dst, UINT8 *src, int dstStride, int srcStride, int mx, int my)\

  510. {\

  511.     qpel_v_lowpass(dst, src, dstStride, srcStride, 8, 128-r);\

  512. }\

  513. \

  514. static void qpel_mc03_c ## name (UINT8 *dst, UINT8 *src, int dstStride, int srcStride, int mx, int my)\

  515. {\

  516.     UINT8 half[64];\

  517.     qpel_v_lowpass(half, src, 8, srcStride, 8, 128-r);\

  518.     avg2_block(dst, src+srcStride, half, dstStride, srcStride, 1-r);\

  519. }\

  520. static void qpel_mc11_c ## name (UINT8 *dst, UINT8 *src, int dstStride, int srcStride, int mx, int my)\

  521. {\

  522.     UINT8 halfH[72];\

  523.     UINT8 halfV[72];\

  524.     UINT8 halfHV[64];\

  525.     qpel_h_lowpass(halfH, src, 8, srcStride, 9, 128-r);\

  526.     qpel_v_lowpass(halfV, src, 9, srcStride, 9, 128-r);\

  527.     qpel_v_lowpass(halfHV, halfH, 8, 8, 8, 128-r);\

  528.     avg4_block(dst, src, halfH, halfV, halfHV, dstStride, srcStride, 2-r);\

  529. }\

  530. static void qpel_mc31_c ## name (UINT8 *dst, UINT8 *src, int dstStride, int srcStride, int mx, int my)\

  531. {\

  532.     UINT8 halfH[72];\

  533.     UINT8 halfV[72];\

  534.     UINT8 halfHV[64];\

  535.     qpel_h_lowpass(halfH, src, 8, srcStride, 9, 128-r);\

  536.     qpel_v_lowpass(halfV, src, 9, srcStride, 9, 128-r);\

  537.     qpel_v_lowpass(halfHV, halfH, 8, 8, 8, 128-r);\

  538.     avg4_block(dst, src+1, halfH, halfV, halfHV, dstStride, srcStride, 2-r);\

  539. }\

  540. static void qpel_mc13_c ## name (UINT8 *dst, UINT8 *src, int dstStride, int srcStride, int mx, int my)\

  541. {\

  542.     UINT8 halfH[72];\

  543.     UINT8 halfV[72];\

  544.     UINT8 halfHV[64];\

  545.     qpel_h_lowpass(halfH, src, 8, srcStride, 9, 128-r);\

  546.     qpel_v_lowpass(halfV, src, 9, srcStride, 9, 128-r);\

  547.     qpel_v_lowpass(halfHV, halfH, 8, 8, 8, 128-r);\

  548.     avg4_block(dst, src+srcStride, halfH, halfV, halfHV, dstStride, srcStride, 2-r);\

  549. }\

  550. static void qpel_mc33_c ## name (UINT8 *dst, UINT8 *src, int dstStride, int srcStride, int mx, int my)\

  551. {\

  552.     UINT8 halfH[72];\

  553.     UINT8 halfV[72];\

  554.     UINT8 halfHV[64];\

  555.     qpel_h_lowpass(halfH, src, 8, srcStride, 9, 128-r);\

  556.     qpel_v_lowpass(halfV, src, 9, srcStride, 9, 128-r);\

  557.     qpel_v_lowpass(halfHV, halfH, 8, 8, 8, 128-r);\

  558.     avg4_block(dst, src+srcStride+1, halfH, halfV, halfHV, dstStride, srcStride, 2-r);\

  559. }\

  560. static void qpel_mc21_c ## name (UINT8 *dst, UINT8 *src, int dstStride, int srcStride, int mx, int my)\

  561. {\

  562.     UINT8 halfH[72];\

  563.     UINT8 halfHV[64];\

  564.     qpel_h_lowpass(halfH, src, 8, srcStride, 9, 128-r);\

  565.     qpel_v_lowpass(halfHV, halfH, 8, 8, 8, 128-r);\

  566.     avg2_block(dst, halfH, halfHV, dstStride, 8, 1-r);\

  567. }\

  568. static void qpel_mc23_c ## name (UINT8 *dst, UINT8 *src, int dstStride, int srcStride, int mx, int my)\

  569. {\

  570.     UINT8 halfH[72];\

  571.     UINT8 halfHV[64];\

  572.     qpel_h_lowpass(halfH, src, 8, srcStride, 9, 128-r);\

  573.     qpel_v_lowpass(halfHV, halfH, 8, 8, 8, 128-r);\

  574.     avg2_block(dst, halfH+8, halfHV, dstStride, 8, 1-r);\

  575. }\

  576. static void qpel_mc12_c ## name (UINT8 *dst, UINT8 *src, int dstStride, int srcStride, int mx, int my)\

  577. {\

  578.     UINT8 halfH[72];\

  579.     UINT8 halfV[72];\

  580.     UINT8 halfHV[64];\

  581.     qpel_h_lowpass(halfH, src, 8, srcStride, 9, 128-r);\

  582.     qpel_v_lowpass(halfV, src, 9, srcStride, 9, 128-r);\

  583.     qpel_v_lowpass(halfHV, halfH, 8, 8, 8, 128-r);\

  584.     avg2_block(dst, halfV, halfHV, dstStride, 9, 1-r);\

  585. }\

  586. static void qpel_mc32_c ## name (UINT8 *dst, UINT8 *src, int dstStride, int srcStride, int mx, int my)\

  587. {\

  588.     UINT8 halfH[72];\

  589.     UINT8 halfV[72];\

  590.     UINT8 halfHV[64];\

  591.     qpel_h_lowpass(halfH, src, 8, srcStride, 9, 128-r);\

  592.     qpel_v_lowpass(halfV, src, 9, srcStride, 9, 128-r);\

  593.     qpel_v_lowpass(halfHV, halfH, 8, 8, 8, 128-r);\

  594.     avg2_block(dst, halfV+1, halfHV, dstStride, 9, 1-r);\

  595. }\

  596. static void qpel_mc22_c ## name (UINT8 *dst, UINT8 *src, int dstStride, int srcStride, int mx, int my)\

  597. {\

  598.     UINT8 halfH[72];\

  599.     qpel_h_lowpass(halfH, src, 8, srcStride, 9, 128-r);\

  600.     qpel_v_lowpass(dst, halfH, dstStride, 8, 8, 128-r);\

  601. }\

  602. qpel_mc_func qpel_mc ## name ## _tab[16]={ \

  603.     qpel_mc00_c ## name,                                                                   \

  604.     qpel_mc10_c ## name,                                                                   \

  605.     qpel_mc20_c ## name,                                                                   \

  606.     qpel_mc30_c ## name,                                                                   \

  607.     qpel_mc01_c ## name,                                                                   \

  608.     qpel_mc11_c ## name,                                                                   \

  609.     qpel_mc21_c ## name,                                                                   \

  610.     qpel_mc31_c ## name,                                                                   \

  611.     qpel_mc02_c ## name,                                                                   \

  612.     qpel_mc12_c ## name,                                                                   \

  613.     qpel_mc22_c ## name,                                                                   \

  614.     qpel_mc32_c ## name,                                                                   \

  615.     qpel_mc03_c ## name,                                                                   \

  616.     qpel_mc13_c ## name,                                                                   \

  617.     qpel_mc23_c ## name,                                                                   \

  618.     qpel_mc33_c ## name,                                                                   \

  619. };

  620. 

  621. QPEL_MC(0, _rnd)

  622. QPEL_MC(1, _no_rnd)

  623. 

  624. int pix_abs16x16_c(UINT8 *pix1, UINT8 *pix2, int line_size, int h)

  625. {

  626.     int s, i;

  627. 

  628.     s = 0;

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

  630.         s += abs(pix1[0] - pix2[0]);

  631.         s += abs(pix1[1] - pix2[1]);

  632.         s += abs(pix1[2] - pix2[2]);

  633.         s += abs(pix1[3] - pix2[3]);

  634.         s += abs(pix1[4] - pix2[4]);

  635.         s += abs(pix1[5] - pix2[5]);

  636.         s += abs(pix1[6] - pix2[6]);

  637.         s += abs(pix1[7] - pix2[7]);

  638.         s += abs(pix1[8] - pix2[8]);

  639.         s += abs(pix1[9] - pix2[9]);

  640.         s += abs(pix1[10] - pix2[10]);

  641.         s += abs(pix1[11] - pix2[11]);

  642.         s += abs(pix1[12] - pix2[12]);

  643.         s += abs(pix1[13] - pix2[13]);

  644.         s += abs(pix1[14] - pix2[14]);

  645.         s += abs(pix1[15] - pix2[15]);

  646.         pix1 += line_size;

  647.         pix2 += line_size;

  648.     }

  649.     return s;

  650. }

  651. 

  652. int pix_abs16x16_x2_c(UINT8 *pix1, UINT8 *pix2, int line_size, int h)

  653. {

  654.     int s, i;

  655. 

  656.     s = 0;

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

  658.         s += abs(pix1[0] - avg2(pix2[0], pix2[1]));

  659.         s += abs(pix1[1] - avg2(pix2[1], pix2[2]));

  660.         s += abs(pix1[2] - avg2(pix2[2], pix2[3]));

  661.         s += abs(pix1[3] - avg2(pix2[3], pix2[4]));

  662.         s += abs(pix1[4] - avg2(pix2[4], pix2[5]));

  663.         s += abs(pix1[5] - avg2(pix2[5], pix2[6]));

  664.         s += abs(pix1[6] - avg2(pix2[6], pix2[7]));

  665.         s += abs(pix1[7] - avg2(pix2[7], pix2[8]));

  666.         s += abs(pix1[8] - avg2(pix2[8], pix2[9]));

  667.         s += abs(pix1[9] - avg2(pix2[9], pix2[10]));

  668.         s += abs(pix1[10] - avg2(pix2[10], pix2[11]));

  669.         s += abs(pix1[11] - avg2(pix2[11], pix2[12]));

  670.         s += abs(pix1[12] - avg2(pix2[12], pix2[13]));

  671.         s += abs(pix1[13] - avg2(pix2[13], pix2[14]));

  672.         s += abs(pix1[14] - avg2(pix2[14], pix2[15]));

  673.         s += abs(pix1[15] - avg2(pix2[15], pix2[16]));

  674.         pix1 += line_size;

  675.         pix2 += line_size;

  676.     }

  677.     return s;

  678. }

  679. 

  680. int pix_abs16x16_y2_c(UINT8 *pix1, UINT8 *pix2, int line_size, int h)

  681. {

  682.     int s, i;

  683.     UINT8 *pix3 = pix2 + line_size;

  684. 

  685.     s = 0;

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

  687.         s += abs(pix1[0] - avg2(pix2[0], pix3[0]));

  688.         s += abs(pix1[1] - avg2(pix2[1], pix3[1]));

  689.         s += abs(pix1[2] - avg2(pix2[2], pix3[2]));

  690.         s += abs(pix1[3] - avg2(pix2[3], pix3[3]));

  691.         s += abs(pix1[4] - avg2(pix2[4], pix3[4]));

  692.         s += abs(pix1[5] - avg2(pix2[5], pix3[5]));

  693.         s += abs(pix1[6] - avg2(pix2[6], pix3[6]));

  694.         s += abs(pix1[7] - avg2(pix2[7], pix3[7]));

  695.         s += abs(pix1[8] - avg2(pix2[8], pix3[8]));

  696.         s += abs(pix1[9] - avg2(pix2[9], pix3[9]));

  697.         s += abs(pix1[10] - avg2(pix2[10], pix3[10]));

  698.         s += abs(pix1[11] - avg2(pix2[11], pix3[11]));

  699.         s += abs(pix1[12] - avg2(pix2[12], pix3[12]));

  700.         s += abs(pix1[13] - avg2(pix2[13], pix3[13]));

  701.         s += abs(pix1[14] - avg2(pix2[14], pix3[14]));

  702.         s += abs(pix1[15] - avg2(pix2[15], pix3[15]));

  703.         pix1 += line_size;

  704.         pix2 += line_size;

  705.         pix3 += line_size;

  706.     }

  707.     return s;

  708. }

  709. 

  710. int pix_abs16x16_xy2_c(UINT8 *pix1, UINT8 *pix2, int line_size, int h)

  711. {

  712.     int s, i;

  713.     UINT8 *pix3 = pix2 + line_size;

  714. 

  715.     s = 0;

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

  717.         s += abs(pix1[0] - avg4(pix2[0], pix2[1], pix3[0], pix3[1]));

  718.         s += abs(pix1[1] - avg4(pix2[1], pix2[2], pix3[1], pix3[2]));

  719.         s += abs(pix1[2] - avg4(pix2[2], pix2[3], pix3[2], pix3[3]));

  720.         s += abs(pix1[3] - avg4(pix2[3], pix2[4], pix3[3], pix3[4]));

  721.         s += abs(pix1[4] - avg4(pix2[4], pix2[5], pix3[4], pix3[5]));

  722.         s += abs(pix1[5] - avg4(pix2[5], pix2[6], pix3[5], pix3[6]));

  723.         s += abs(pix1[6] - avg4(pix2[6], pix2[7], pix3[6], pix3[7]));

  724.         s += abs(pix1[7] - avg4(pix2[7], pix2[8], pix3[7], pix3[8]));

  725.         s += abs(pix1[8] - avg4(pix2[8], pix2[9], pix3[8], pix3[9]));

  726.         s += abs(pix1[9] - avg4(pix2[9], pix2[10], pix3[9], pix3[10]));

  727.         s += abs(pix1[10] - avg4(pix2[10], pix2[11], pix3[10], pix3[11]));

  728.         s += abs(pix1[11] - avg4(pix2[11], pix2[12], pix3[11], pix3[12]));

  729.         s += abs(pix1[12] - avg4(pix2[12], pix2[13], pix3[12], pix3[13]));

  730.         s += abs(pix1[13] - avg4(pix2[13], pix2[14], pix3[13], pix3[14]));

  731.         s += abs(pix1[14] - avg4(pix2[14], pix2[15], pix3[14], pix3[15]));

  732.         s += abs(pix1[15] - avg4(pix2[15], pix2[16], pix3[15], pix3[16]));

  733.         pix1 += line_size;

  734.         pix2 += line_size;

  735.         pix3 += line_size;

  736.     }

  737.     return s;

  738. }

  739. 

  740. /* permute block according so that it corresponds to the MMX idct

  741.    order */

  742. #ifdef SIMPLE_IDCT

  743.  /* general permutation, but perhaps slightly slower */

  744. void block_permute(INT16 *block)

  745. {

  746. 	int i;

  747. 	INT16 temp[64];

  748. 

  749. 	for(i=0; i<64; i++) temp[ block_permute_op(i) ] = block[i];

  750. 

  751. 	for(i=0; i<64; i++) block[i] = temp[i];

  752. }

  753. #else

  754. 

  755. void block_permute(INT16 *block)

  756. {

  757.     int tmp1, tmp2, tmp3, tmp4, tmp5, tmp6;

  758.     int i;

  759. 

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

  761.         tmp1 = block[1];

  762.         tmp2 = block[2];

  763.         tmp3 = block[3];

  764.         tmp4 = block[4];

  765.         tmp5 = block[5];

  766.         tmp6 = block[6];

  767.         block[1] = tmp2;

  768.         block[2] = tmp4;

  769.         block[3] = tmp6;

  770.         block[4] = tmp1;

  771.         block[5] = tmp3;

  772.         block[6] = tmp5;

  773.         block += 8;

  774.     }

  775. }

  776. #endif

  777. 

  778. void dsputil_init(void)

  779. {

  780.     int i, j;

  781.     int use_permuted_idct;

  782. 

  783.     for(i=0;i<256;i++) cropTbl[i + MAX_NEG_CROP] = i;

  784.     for(i=0;i<MAX_NEG_CROP;i++) {

  785.         cropTbl[i] = 0;

  786.         cropTbl[i + MAX_NEG_CROP + 256] = 255;

  787.     }

  788. 

  789.     for(i=0;i<512;i++) {

  790.         squareTbl[i] = (i - 256) * (i - 256);

  791.     }

  792. 

  793. #ifdef SIMPLE_IDCT

  794.     ff_idct = simple_idct;

  795. #else

  796.     ff_idct = j_rev_dct;

  797. #endif

  798.     get_pixels = get_pixels_c;

  799.     put_pixels_clamped = put_pixels_clamped_c;

  800.     add_pixels_clamped = add_pixels_clamped_c;

  801.     gmc1= gmc1_c;

  802. 

  803.     pix_abs16x16 = pix_abs16x16_c;

  804.     pix_abs16x16_x2 = pix_abs16x16_x2_c;

  805.     pix_abs16x16_y2 = pix_abs16x16_y2_c;

  806.     pix_abs16x16_xy2 = pix_abs16x16_xy2_c;

  807.     av_fdct = jpeg_fdct_ifast;

  808. 

  809.     use_permuted_idct = 1;

  810. 

  811. #ifdef HAVE_MMX

  812.     dsputil_init_mmx();

  813. #endif

  814. #ifdef ARCH_ARMV4L

  815.     dsputil_init_armv4l();

  816. #endif

  817. #ifdef HAVE_MLIB

  818.     dsputil_init_mlib();

  819.     use_permuted_idct = 0;

  820. #endif

  821. #ifdef ARCH_ALPHA

  822.     dsputil_init_alpha();

  823.     use_permuted_idct = 0;

  824. #endif

  825. 

  826. #ifdef SIMPLE_IDCT

  827.     if(ff_idct == simple_idct) use_permuted_idct=0;

  828. #endif

  829. 

  830.     if(use_permuted_idct)

  831. #ifdef SIMPLE_IDCT

  832.         for(i=0; i<64; i++) permutation[i]= simple_mmx_permutation[i];

  833. #else

  834.         for(i=0; i<64; i++) permutation[i]= (i & 0x38) | ((i & 6) >> 1) | ((i & 1) << 2);

  835. #endif

  836.     else

  837.         for(i=0; i<64; i++) permutation[i]=i;

  838. 

  839.     for(i=0; i<64; i++) inv_zigzag_direct16[zigzag_direct[i]]= i+1;

  840.     for(i=0; i<64; i++) zigzag_direct_noperm[i]= zigzag_direct[i];

  841.     

  842.     if (use_permuted_idct) {

  843.         /* permute for IDCT */

  844.         for(i=0;i<64;i++) {

  845.             j = zigzag_direct[i];

  846.             zigzag_direct[i] = block_permute_op(j);

  847.             j = ff_alternate_horizontal_scan[i];

  848.             ff_alternate_horizontal_scan[i] = block_permute_op(j);

  849.             j = ff_alternate_vertical_scan[i];

  850.             ff_alternate_vertical_scan[i] = block_permute_op(j);

  851.         }

  852.         block_permute(default_intra_matrix);

  853.         block_permute(default_non_intra_matrix);

  854.     }

  855.     

  856.     build_zigzag_end();

  857. }

  858. 

  859. void get_psnr(UINT8 *orig_image[3], UINT8 *coded_image[3],

  860.               int orig_linesize[3], int coded_linesize,

  861.               AVCodecContext *avctx)

  862. {

  863.     int quad, diff, x, y;

  864.     UINT8 *orig, *coded;

  865.     UINT32 *sq = squareTbl + 256;

  866.     

  867.     quad = 0;

  868.     diff = 0;

  869.     

  870.     /* Luminance */

  871.     orig = orig_image[0];

  872.     coded = coded_image[0];

  873.     

  874.     for (y=0;y<avctx->height;y++) {

  875.         for (x=0;x<avctx->width;x++) {

  876.             diff = *(orig + x) - *(coded + x);

  877.             quad += sq[diff];

  878.         }

  879.         orig += orig_linesize[0];

  880.         coded += coded_linesize;

  881.     }

  882.    

  883.     avctx->psnr_y = (float) quad / (float) (avctx->width * avctx->height);

  884.     

  885.     if (avctx->psnr_y) {

  886.         avctx->psnr_y = (float) (255 * 255) / avctx->psnr_y;

  887.         avctx->psnr_y = 10 * (float) log10 (avctx->psnr_y); 

  888.     } else

  889.         avctx->psnr_y = 99.99;

  890. }