falkTX
/
FFmpeg
mirror of https://github.com/falkTX/FFmpeg.git
1
0
Fork 0
Code Issues 0 Releases 338 Wiki Activity
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
451 Commits
32 Branches
850MB
Tree: 1e1c4fe926
Branches Tags
${ item.name }
Create branch ${ searchTerm }
from '1e1c4fe926'
${ noResults }
FFmpeg/libavcodec/dsputil.c

579 lines
24KB
Raw Blame History 

  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 "avcodec.h"

  22. #include "dsputil.h"

  23. #include "simple_idct.h"

  24. 

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

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

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

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

  29. 

  30. op_pixels_abs_func pix_abs16x16;

  31. op_pixels_abs_func pix_abs16x16_x2;

  32. op_pixels_abs_func pix_abs16x16_y2;

  33. op_pixels_abs_func pix_abs16x16_xy2;

  34. 

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

  36. UINT32 squareTbl[512];

  37. 

  38. extern UINT16 default_intra_matrix[64];

  39. extern UINT16 default_non_intra_matrix[64];

  40. 

  41. UINT8 zigzag_direct[64] = {

  42.     0, 1, 8, 16, 9, 2, 3, 10,

  43.     17, 24, 32, 25, 18, 11, 4, 5,

  44.     12, 19, 26, 33, 40, 48, 41, 34,

  45.     27, 20, 13, 6, 7, 14, 21, 28,

  46.     35, 42, 49, 56, 57, 50, 43, 36,

  47.     29, 22, 15, 23, 30, 37, 44, 51,

  48.     58, 59, 52, 45, 38, 31, 39, 46,

  49.     53, 60, 61, 54, 47, 55, 62, 63

  50. };

  51. 

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

  53. UINT16 __align8 inv_zigzag_direct16[64];

  54. 

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

  56. UINT8 zigzag_direct_noperm[64];

  57. 

  58. UINT8 ff_alternate_horizontal_scan[64] = {

  59.     0,  1,  2,  3,  8,  9, 16, 17, 

  60.     10, 11,  4,  5,  6,  7, 15, 14,

  61.     13, 12, 19, 18, 24, 25, 32, 33, 

  62.     26, 27, 20, 21, 22, 23, 28, 29,

  63.     30, 31, 34, 35, 40, 41, 48, 49, 

  64.     42, 43, 36, 37, 38, 39, 44, 45,

  65.     46, 47, 50, 51, 56, 57, 58, 59, 

  66.     52, 53, 54, 55, 60, 61, 62, 63,

  67. };

  68. 

  69. UINT8 ff_alternate_vertical_scan[64] = {

  70.     0,  8, 16, 24,  1,  9,  2, 10, 

  71.     17, 25, 32, 40, 48, 56, 57, 49,

  72.     41, 33, 26, 18,  3, 11,  4, 12, 

  73.     19, 27, 34, 42, 50, 58, 35, 43,

  74.     51, 59, 20, 28,  5, 13,  6, 14, 

  75.     21, 29, 36, 44, 52, 60, 37, 45,

  76.     53, 61, 22, 30,  7, 15, 23, 31, 

  77.     38, 46, 54, 62, 39, 47, 55, 63,

  78. };

  79. 

  80. /* Input permutation for the simple_idct_mmx */

  81. static UINT8 simple_mmx_permutation[64]={

  82. 	0x00, 0x08, 0x04, 0x09, 0x01, 0x0C, 0x05, 0x0D, 

  83. 	0x10, 0x18, 0x14, 0x19, 0x11, 0x1C, 0x15, 0x1D, 

  84. 	0x20, 0x28, 0x24, 0x29, 0x21, 0x2C, 0x25, 0x2D, 

  85. 	0x12, 0x1A, 0x16, 0x1B, 0x13, 0x1E, 0x17, 0x1F, 

  86. 	0x02, 0x0A, 0x06, 0x0B, 0x03, 0x0E, 0x07, 0x0F, 

  87. 	0x30, 0x38, 0x34, 0x39, 0x31, 0x3C, 0x35, 0x3D, 

  88. 	0x22, 0x2A, 0x26, 0x2B, 0x23, 0x2E, 0x27, 0x2F, 

  89. 	0x32, 0x3A, 0x36, 0x3B, 0x33, 0x3E, 0x37, 0x3F,

  90. };

  91. 

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

  93. UINT32 inverse[256]={

  94.          0, 4294967295U,2147483648U,1431655766, 1073741824,  858993460,  715827883,  613566757, 

  95.  536870912,  477218589,  429496730,  390451573,  357913942,  330382100,  306783379,  286331154, 

  96.  268435456,  252645136,  238609295,  226050911,  214748365,  204522253,  195225787,  186737709, 

  97.  178956971,  171798692,  165191050,  159072863,  153391690,  148102321,  143165577,  138547333, 

  98.  134217728,  130150525,  126322568,  122713352,  119304648,  116080198,  113025456,  110127367, 

  99.  107374183,  104755300,  102261127,   99882961,   97612894,   95443718,   93368855,   91382283, 

  100.   89478486,   87652394,   85899346,   84215046,   82595525,   81037119,   79536432,   78090315, 

  101.   76695845,   75350304,   74051161,   72796056,   71582789,   70409300,   69273667,   68174085, 

  102.   67108864,   66076420,   65075263,   64103990,   63161284,   62245903,   61356676,   60492498, 

  103.   59652324,   58835169,   58040099,   57266231,   56512728,   55778797,   55063684,   54366675, 

  104.   53687092,   53024288,   52377650,   51746594,   51130564,   50529028,   49941481,   49367441, 

  105.   48806447,   48258060,   47721859,   47197443,   46684428,   46182445,   45691142,   45210183, 

  106.   44739243,   44278014,   43826197,   43383509,   42949673,   42524429,   42107523,   41698712, 

  107.   41297763,   40904451,   40518560,   40139882,   39768216,   39403370,   39045158,   38693400, 

  108.   38347923,   38008561,   37675152,   37347542,   37025581,   36709123,   36398028,   36092163, 

  109.   35791395,   35495598,   35204650,   34918434,   34636834,   34359739,   34087043,   33818641, 

  110.   33554432,   33294321,   33038210,   32786010,   32537632,   32292988,   32051995,   31814573, 

  111.   31580642,   31350127,   31122952,   30899046,   30678338,   30460761,   30246249,   30034737, 

  112.   29826162,   29620465,   29417585,   29217465,   29020050,   28825284,   28633116,   28443493, 

  113.   28256364,   28071682,   27889399,   27709467,   27531842,   27356480,   27183338,   27012373, 

  114.   26843546,   26676816,   26512144,   26349493,   26188825,   26030105,   25873297,   25718368, 

  115.   25565282,   25414008,   25264514,   25116768,   24970741,   24826401,   24683721,   24542671, 

  116.   24403224,   24265352,   24129030,   23994231,   23860930,   23729102,   23598722,   23469767, 

  117.   23342214,   23216040,   23091223,   22967740,   22845571,   22724695,   22605092,   22486740, 

  118.   22369622,   22253717,   22139007,   22025474,   21913099,   21801865,   21691755,   21582751, 

  119.   21474837,   21367997,   21262215,   21157475,   21053762,   20951060,   20849356,   20748635, 

  120.   20648882,   20550083,   20452226,   20355296,   20259280,   20164166,   20069941,   19976593, 

  121.   19884108,   19792477,   19701685,   19611723,   19522579,   19434242,   19346700,   19259944, 

  122.   19173962,   19088744,   19004281,   18920561,   18837576,   18755316,   18673771,   18592933, 

  123.   18512791,   18433337,   18354562,   18276457,   18199014,   18122225,   18046082,   17970575, 

  124.   17895698,   17821442,   17747799,   17674763,   17602325,   17530479,   17459217,   17388532, 

  125.   17318417,   17248865,   17179870,   17111424,   17043522,   16976156,   16909321,   16843010,

  126. };

  127. 

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

  129. UINT8 zigzag_end[64];

  130. 

  131. UINT8 permutation[64];

  132. //UINT8 invPermutation[64];

  133. 

  134. static void build_zigzag_end()

  135. {

  136.     int lastIndex;

  137.     int lastIndexAfterPerm=0;

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

  139.     {

  140.         if(zigzag_direct[lastIndex] > lastIndexAfterPerm) 

  141.             lastIndexAfterPerm= zigzag_direct[lastIndex];

  142.         zigzag_end[lastIndex]= lastIndexAfterPerm + 1;

  143.     }

  144. }

  145. 

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

  147. {

  148.     DCTELEM *p;

  149.     const UINT8 *pix;

  150.     int i;

  151. 

  152.     /* read the pixels */

  153.     p = block;

  154.     pix = pixels;

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

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

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

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

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

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

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

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

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

  164.         pix += line_size;

  165.         p += 8;

  166.     }

  167. }

  168. 

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

  170. {

  171.     const DCTELEM *p;

  172.     UINT8 *pix;

  173.     int i;

  174.     UINT8 *cm = cropTbl + MAX_NEG_CROP;

  175.     

  176.     /* read the pixels */

  177.     p = block;

  178.     pix = pixels;

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

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

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

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

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

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

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

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

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

  188.         pix += line_size;

  189.         p += 8;

  190.     }

  191. }

  192. 

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

  194. {

  195.     const DCTELEM *p;

  196.     UINT8 *pix;

  197.     int i;

  198.     UINT8 *cm = cropTbl + MAX_NEG_CROP;

  199.     

  200.     /* read the pixels */

  201.     p = block;

  202.     pix = pixels;

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

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

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

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

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

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

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

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

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

  212.         pix += line_size;

  213.         p += 8;

  214.     }

  215. }

  216. 

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

  218.                                                                                          \

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

  220. {                                                                                        \

  221.     BTYPE *p;                                                                            \

  222.     const UINT8 *pix;                                                                    \

  223.                                                                                          \

  224.     p = block;                                                                           \

  225.     pix = pixels;                                                                        \

  226.     do {                                                                                 \

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

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

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

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

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

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

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

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

  235.         pix += line_size;                                                                \

  236.         p += INCR;                                                                       \

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

  238. }                                                                                        \

  239.                                                                                          \

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

  241. {                                                                                        \

  242.     BTYPE *p;                                                                          \

  243.     const UINT8 *pix;                                                                    \

  244.                                                                                          \

  245.     p = block;                                                                           \

  246.     pix = pixels;                                                                        \

  247.     do {                                                                   \

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

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

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

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

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

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

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

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

  256.         pix += line_size;                                                                \

  257.         p += INCR;                                                                       \

  258.     } while (--h);                                                                        \

  259. }                                                                                        \

  260.                                                                                          \

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

  262. {                                                                                        \

  263.     BTYPE *p;                                                                          \

  264.     const UINT8 *pix;                                                                    \

  265.     const UINT8 *pix1;                                                                   \

  266.                                                                                          \

  267.     p = block;                                                                           \

  268.     pix = pixels;                                                                        \

  269.     pix1 = pixels + line_size;                                                           \

  270.     do {                                                                                 \

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

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

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

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

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

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

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

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

  279.         pix += line_size;                                                                \

  280.         pix1 += line_size;                                                               \

  281.         p += INCR;                                                                       \

  282.     } while(--h);                                                                         \

  283. }                                                                                        \

  284.                                                                                          \

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

  286. {                                                                                        \

  287.     BTYPE *p;                                                                          \

  288.     const UINT8 *pix;                                                                    \

  289.     const UINT8 *pix1;                                                                   \

  290.                                                                                          \

  291.     p = block;                                                                           \

  292.     pix = pixels;                                                                        \

  293.     pix1 = pixels + line_size;                                                           \

  294.     do {                                                                   \

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

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

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

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

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

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

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

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

  303.         pix += line_size;                                                                \

  304.         pix1 += line_size;                                                               \

  305.         p += INCR;                                                                       \

  306.     } while(--h);                                                                         \

  307. }                                                                                        \

  308.                                                                                          \

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

  310.     OPNAME ## _pixels,                                                                   \

  311.     OPNAME ## _pixels_x2,                                                                \

  312.     OPNAME ## _pixels_y2,                                                                \

  313.     OPNAME ## _pixels_xy2,                                                               \

  314. };

  315. 

  316. 

  317. /* rounding primitives */

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

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

  320. 

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

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

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

  324. 

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

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

  327. 

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

  329. 

  330. /* not rounding primitives */

  331. #undef avg2

  332. #undef avg4

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

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

  335. 

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

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

  338. 

  339. /* motion estimation */

  340. 

  341. #undef avg2

  342. #undef avg4

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

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

  345. 

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

  347. {

  348.     int s, i;

  349. 

  350.     s = 0;

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  368.         pix1 += line_size;

  369.         pix2 += line_size;

  370.     }

  371.     return s;

  372. }

  373. 

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

  375. {

  376.     int s, i;

  377. 

  378.     s = 0;

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  396.         pix1 += line_size;

  397.         pix2 += line_size;

  398.     }

  399.     return s;

  400. }

  401. 

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

  403. {

  404.     int s, i;

  405.     UINT8 *pix3 = pix2 + line_size;

  406. 

  407.     s = 0;

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  425.         pix1 += line_size;

  426.         pix2 += line_size;

  427.         pix3 += line_size;

  428.     }

  429.     return s;

  430. }

  431. 

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

  433. {

  434.     int s, i;

  435.     UINT8 *pix3 = pix2 + line_size;

  436. 

  437.     s = 0;

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  455.         pix1 += line_size;

  456.         pix2 += line_size;

  457.         pix3 += line_size;

  458.     }

  459.     return s;

  460. }

  461. 

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

  463.    order */

  464. #ifdef SIMPLE_IDCT

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

  466. void block_permute(INT16 *block)

  467. {

  468. 	int i;

  469. 	INT16 temp[64];

  470. 

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

  472. 

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

  474. }

  475. #else

  476. 

  477. void block_permute(INT16 *block)

  478. {

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

  480.     int i;

  481. 

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

  483.         tmp1 = block[1];

  484.         tmp2 = block[2];

  485.         tmp3 = block[3];

  486.         tmp4 = block[4];

  487.         tmp5 = block[5];

  488.         tmp6 = block[6];

  489.         block[1] = tmp2;

  490.         block[2] = tmp4;

  491.         block[3] = tmp6;

  492.         block[4] = tmp1;

  493.         block[5] = tmp3;

  494.         block[6] = tmp5;

  495.         block += 8;

  496.     }

  497. }

  498. #endif

  499. 

  500. void dsputil_init(void)

  501. {

  502.     int i, j;

  503.     int use_permuted_idct;

  504. 

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

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

  507.         cropTbl[i] = 0;

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

  509.     }

  510. 

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

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

  513.     }

  514. 

  515. #ifdef SIMPLE_IDCT

  516.     ff_idct = simple_idct;

  517. #else

  518.     ff_idct = j_rev_dct;

  519. #endif

  520.     get_pixels = get_pixels_c;

  521.     put_pixels_clamped = put_pixels_clamped_c;

  522.     add_pixels_clamped = add_pixels_clamped_c;

  523. 

  524.     pix_abs16x16 = pix_abs16x16_c;

  525.     pix_abs16x16_x2 = pix_abs16x16_x2_c;

  526.     pix_abs16x16_y2 = pix_abs16x16_y2_c;

  527.     pix_abs16x16_xy2 = pix_abs16x16_xy2_c;

  528.     av_fdct = jpeg_fdct_ifast;

  529. 

  530.     use_permuted_idct = 1;

  531. 

  532. #ifdef HAVE_MMX

  533.     dsputil_init_mmx();

  534. #endif

  535. #ifdef ARCH_ARMV4L

  536.     dsputil_init_armv4l();

  537. #endif

  538. #ifdef HAVE_MLIB

  539.     dsputil_init_mlib();

  540.     use_permuted_idct = 0;

  541. #endif

  542. #ifdef ARCH_ALPHA

  543.     dsputil_init_alpha();

  544.     use_permuted_idct = 0;

  545. #endif

  546. 

  547. #ifdef SIMPLE_IDCT

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

  549. #endif

  550. 

  551.     if(use_permuted_idct)

  552. #ifdef SIMPLE_IDCT

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

  554. #else

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

  556. #endif

  557.     else

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

  559. 

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

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

  562.     

  563.     if (use_permuted_idct) {

  564.         /* permute for IDCT */

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

  566.             j = zigzag_direct[i];

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

  568.             j = ff_alternate_horizontal_scan[i];

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

  570.             j = ff_alternate_vertical_scan[i];

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

  572.         }

  573.         block_permute(default_intra_matrix);

  574.         block_permute(default_non_intra_matrix);

  575.     }

  576.     

  577.     build_zigzag_end();

  578. }