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FFmpeg/libswscale/swscale.c

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  1. /*

  2.  * Copyright (C) 2001-2003 Michael Niedermayer <michaelni@gmx.at>

  3.  *

  4.  * This file is part of FFmpeg.

  5.  *

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

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

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

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

  10.  *

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

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

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

  14.  * GNU General Public License for more details.

  15.  *

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

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

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

  19.  *

  20.  * the C code (not assembly, mmx, ...) of this file can be used

  21.  * under the LGPL license too

  22.  */

  23. 

  24. /*

  25.   supported Input formats: YV12, I420/IYUV, YUY2, UYVY, BGR32, BGR32_1, BGR24, BGR16, BGR15, RGB32, RGB32_1, RGB24, Y8/Y800, YVU9/IF09, PAL8

  26.   supported output formats: YV12, I420/IYUV, YUY2, UYVY, {BGR,RGB}{1,4,8,15,16,24,32}, Y8/Y800, YVU9/IF09

  27.   {BGR,RGB}{1,4,8,15,16} support dithering

  28. 

  29.   unscaled special converters (YV12=I420=IYUV, Y800=Y8)

  30.   YV12 -> {BGR,RGB}{1,4,8,15,16,24,32}

  31.   x -> x

  32.   YUV9 -> YV12

  33.   YUV9/YV12 -> Y800

  34.   Y800 -> YUV9/YV12

  35.   BGR24 -> BGR32 & RGB24 -> RGB32

  36.   BGR32 -> BGR24 & RGB32 -> RGB24

  37.   BGR15 -> BGR16

  38. */

  39. 

  40. /*

  41. tested special converters (most are tested actually, but I did not write it down ...)

  42.  YV12 -> BGR16

  43.  YV12 -> YV12

  44.  BGR15 -> BGR16

  45.  BGR16 -> BGR16

  46.  YVU9 -> YV12

  47. 

  48. untested special converters

  49.   YV12/I420 -> BGR15/BGR24/BGR32 (it is the yuv2rgb stuff, so it should be ok)

  50.   YV12/I420 -> YV12/I420

  51.   YUY2/BGR15/BGR24/BGR32/RGB24/RGB32 -> same format

  52.   BGR24 -> BGR32 & RGB24 -> RGB32

  53.   BGR32 -> BGR24 & RGB32 -> RGB24

  54.   BGR24 -> YV12

  55. */

  56. 

  57. #define _SVID_SOURCE //needed for MAP_ANONYMOUS

  58. #include <inttypes.h>

  59. #include <string.h>

  60. #include <math.h>

  61. #include <stdio.h>

  62. #include <unistd.h>

  63. #include "config.h"

  64. #include <assert.h>

  65. #ifdef HAVE_SYS_MMAN_H

  66. #include <sys/mman.h>

  67. #if defined(MAP_ANON) && !defined(MAP_ANONYMOUS)

  68. #define MAP_ANONYMOUS MAP_ANON

  69. #endif

  70. #endif

  71. #include "swscale.h"

  72. #include "swscale_internal.h"

  73. #include "rgb2rgb.h"

  74. #include "libavutil/x86_cpu.h"

  75. #include "libavutil/bswap.h"

  76. 

  77. unsigned swscale_version(void)

  78. {

  79.     return LIBSWSCALE_VERSION_INT;

  80. }

  81. 

  82. #undef MOVNTQ

  83. #undef PAVGB

  84. 

  85. //#undef HAVE_MMX2

  86. //#define HAVE_3DNOW

  87. //#undef HAVE_MMX

  88. //#undef ARCH_X86

  89. //#define WORDS_BIGENDIAN

  90. #define DITHER1XBPP

  91. 

  92. #define FAST_BGR2YV12 // use 7 bit coeffs instead of 15bit

  93. 

  94. #define RET 0xC3 //near return opcode for X86

  95. 

  96. #ifdef M_PI

  97. #define PI M_PI

  98. #else

  99. #define PI 3.14159265358979323846

  100. #endif

  101. 

  102. #define isSupportedIn(x)    (       \

  103.            (x)==PIX_FMT_YUV420P     \

  104.         || (x)==PIX_FMT_YUVA420P    \

  105.         || (x)==PIX_FMT_YUYV422     \

  106.         || (x)==PIX_FMT_UYVY422     \

  107.         || (x)==PIX_FMT_RGB32       \

  108.         || (x)==PIX_FMT_RGB32_1     \

  109.         || (x)==PIX_FMT_BGR24       \

  110.         || (x)==PIX_FMT_BGR565      \

  111.         || (x)==PIX_FMT_BGR555      \

  112.         || (x)==PIX_FMT_BGR32       \

  113.         || (x)==PIX_FMT_BGR32_1     \

  114.         || (x)==PIX_FMT_RGB24       \

  115.         || (x)==PIX_FMT_RGB565      \

  116.         || (x)==PIX_FMT_RGB555      \

  117.         || (x)==PIX_FMT_GRAY8       \

  118.         || (x)==PIX_FMT_YUV410P     \

  119.         || (x)==PIX_FMT_YUV440P     \

  120.         || (x)==PIX_FMT_GRAY16BE    \

  121.         || (x)==PIX_FMT_GRAY16LE    \

  122.         || (x)==PIX_FMT_YUV444P     \

  123.         || (x)==PIX_FMT_YUV422P     \

  124.         || (x)==PIX_FMT_YUV411P     \

  125.         || (x)==PIX_FMT_PAL8        \

  126.         || (x)==PIX_FMT_BGR8        \

  127.         || (x)==PIX_FMT_RGB8        \

  128.         || (x)==PIX_FMT_BGR4_BYTE   \

  129.         || (x)==PIX_FMT_RGB4_BYTE   \

  130.         || (x)==PIX_FMT_YUV440P     \

  131.         || (x)==PIX_FMT_MONOWHITE   \

  132.         || (x)==PIX_FMT_MONOBLACK   \

  133.     )

  134. #define isSupportedOut(x)   (       \

  135.            (x)==PIX_FMT_YUV420P     \

  136.         || (x)==PIX_FMT_YUYV422     \

  137.         || (x)==PIX_FMT_UYVY422     \

  138.         || (x)==PIX_FMT_YUV444P     \

  139.         || (x)==PIX_FMT_YUV422P     \

  140.         || (x)==PIX_FMT_YUV411P     \

  141.         || isRGB(x)                 \

  142.         || isBGR(x)                 \

  143.         || (x)==PIX_FMT_NV12        \

  144.         || (x)==PIX_FMT_NV21        \

  145.         || (x)==PIX_FMT_GRAY16BE    \

  146.         || (x)==PIX_FMT_GRAY16LE    \

  147.         || (x)==PIX_FMT_GRAY8       \

  148.         || (x)==PIX_FMT_YUV410P     \

  149.         || (x)==PIX_FMT_YUV440P     \

  150.     )

  151. #define isPacked(x)         (       \

  152.            (x)==PIX_FMT_PAL8        \

  153.         || (x)==PIX_FMT_YUYV422     \

  154.         || (x)==PIX_FMT_UYVY422     \

  155.         || isRGB(x)                 \

  156.         || isBGR(x)                 \

  157.     )

  158. 

  159. #define RGB2YUV_SHIFT 15

  160. #define BY ( (int)(0.114*219/255*(1<<RGB2YUV_SHIFT)+0.5))

  161. #define BV (-(int)(0.081*224/255*(1<<RGB2YUV_SHIFT)+0.5))

  162. #define BU ( (int)(0.500*224/255*(1<<RGB2YUV_SHIFT)+0.5))

  163. #define GY ( (int)(0.587*219/255*(1<<RGB2YUV_SHIFT)+0.5))

  164. #define GV (-(int)(0.419*224/255*(1<<RGB2YUV_SHIFT)+0.5))

  165. #define GU (-(int)(0.331*224/255*(1<<RGB2YUV_SHIFT)+0.5))

  166. #define RY ( (int)(0.299*219/255*(1<<RGB2YUV_SHIFT)+0.5))

  167. #define RV ( (int)(0.500*224/255*(1<<RGB2YUV_SHIFT)+0.5))

  168. #define RU (-(int)(0.169*224/255*(1<<RGB2YUV_SHIFT)+0.5))

  169. 

  170. extern const int32_t Inverse_Table_6_9[8][4];

  171. 

  172. static const double rgb2yuv_table[8][9]={

  173.     {0.7152, 0.0722, 0.2126, -0.386, 0.5, -0.115, -0.454, -0.046, 0.5},

  174.     {0.7152, 0.0722, 0.2126, -0.386, 0.5, -0.115, -0.454, -0.046, 0.5},

  175.     {0.587 , 0.114 , 0.299 , -0.331, 0.5, -0.169, -0.419, -0.081, 0.5},

  176.     {0.587 , 0.114 , 0.299 , -0.331, 0.5, -0.169, -0.419, -0.081, 0.5},

  177.     {0.59  , 0.11  , 0.30  , -0.331, 0.5, -0.169, -0.421, -0.079, 0.5}, //FCC

  178.     {0.587 , 0.114 , 0.299 , -0.331, 0.5, -0.169, -0.419, -0.081, 0.5},

  179.     {0.587 , 0.114 , 0.299 , -0.331, 0.5, -0.169, -0.419, -0.081, 0.5}, //SMPTE 170M

  180.     {0.701 , 0.087 , 0.212 , -0.384, 0.5  -0.116, -0.445, -0.055, 0.5}, //SMPTE 240M

  181. };

  182. 

  183. /*

  184. NOTES

  185. Special versions: fast Y 1:1 scaling (no interpolation in y direction)

  186. 

  187. TODO

  188. more intelligent misalignment avoidance for the horizontal scaler

  189. write special vertical cubic upscale version

  190. Optimize C code (yv12 / minmax)

  191. add support for packed pixel yuv input & output

  192. add support for Y8 output

  193. optimize bgr24 & bgr32

  194. add BGR4 output support

  195. write special BGR->BGR scaler

  196. */

  197. 

  198. #if defined(ARCH_X86) && defined (CONFIG_GPL)

  199. DECLARE_ASM_CONST(8, uint64_t, bF8)=       0xF8F8F8F8F8F8F8F8LL;

  200. DECLARE_ASM_CONST(8, uint64_t, bFC)=       0xFCFCFCFCFCFCFCFCLL;

  201. DECLARE_ASM_CONST(8, uint64_t, w10)=       0x0010001000100010LL;

  202. DECLARE_ASM_CONST(8, uint64_t, w02)=       0x0002000200020002LL;

  203. DECLARE_ASM_CONST(8, uint64_t, bm00001111)=0x00000000FFFFFFFFLL;

  204. DECLARE_ASM_CONST(8, uint64_t, bm00000111)=0x0000000000FFFFFFLL;

  205. DECLARE_ASM_CONST(8, uint64_t, bm11111000)=0xFFFFFFFFFF000000LL;

  206. DECLARE_ASM_CONST(8, uint64_t, bm01010101)=0x00FF00FF00FF00FFLL;

  207. 

  208. static volatile uint64_t attribute_used __attribute__((aligned(8))) b5Dither;

  209. static volatile uint64_t attribute_used __attribute__((aligned(8))) g5Dither;

  210. static volatile uint64_t attribute_used __attribute__((aligned(8))) g6Dither;

  211. static volatile uint64_t attribute_used __attribute__((aligned(8))) r5Dither;

  212. 

  213. const DECLARE_ALIGNED(8, uint64_t, ff_dither4[2]) = {

  214.         0x0103010301030103LL,

  215.         0x0200020002000200LL,};

  216. 

  217. const DECLARE_ALIGNED(8, uint64_t, ff_dither8[2]) = {

  218.         0x0602060206020602LL,

  219.         0x0004000400040004LL,};

  220. 

  221. DECLARE_ASM_CONST(8, uint64_t, b16Mask)=   0x001F001F001F001FLL;

  222. DECLARE_ASM_CONST(8, uint64_t, g16Mask)=   0x07E007E007E007E0LL;

  223. DECLARE_ASM_CONST(8, uint64_t, r16Mask)=   0xF800F800F800F800LL;

  224. DECLARE_ASM_CONST(8, uint64_t, b15Mask)=   0x001F001F001F001FLL;

  225. DECLARE_ASM_CONST(8, uint64_t, g15Mask)=   0x03E003E003E003E0LL;

  226. DECLARE_ASM_CONST(8, uint64_t, r15Mask)=   0x7C007C007C007C00LL;

  227. 

  228. DECLARE_ALIGNED(8, const uint64_t, ff_M24A)         = 0x00FF0000FF0000FFLL;

  229. DECLARE_ALIGNED(8, const uint64_t, ff_M24B)         = 0xFF0000FF0000FF00LL;

  230. DECLARE_ALIGNED(8, const uint64_t, ff_M24C)         = 0x0000FF0000FF0000LL;

  231. 

  232. #ifdef FAST_BGR2YV12

  233. DECLARE_ALIGNED(8, const uint64_t, ff_bgr2YCoeff)   = 0x000000210041000DULL;

  234. DECLARE_ALIGNED(8, const uint64_t, ff_bgr2UCoeff)   = 0x0000FFEEFFDC0038ULL;

  235. DECLARE_ALIGNED(8, const uint64_t, ff_bgr2VCoeff)   = 0x00000038FFD2FFF8ULL;

  236. #else

  237. DECLARE_ALIGNED(8, const uint64_t, ff_bgr2YCoeff)   = 0x000020E540830C8BULL;

  238. DECLARE_ALIGNED(8, const uint64_t, ff_bgr2UCoeff)   = 0x0000ED0FDAC23831ULL;

  239. DECLARE_ALIGNED(8, const uint64_t, ff_bgr2VCoeff)   = 0x00003831D0E6F6EAULL;

  240. #endif /* FAST_BGR2YV12 */

  241. DECLARE_ALIGNED(8, const uint64_t, ff_bgr2YOffset)  = 0x1010101010101010ULL;

  242. DECLARE_ALIGNED(8, const uint64_t, ff_bgr2UVOffset) = 0x8080808080808080ULL;

  243. DECLARE_ALIGNED(8, const uint64_t, ff_w1111)        = 0x0001000100010001ULL;

  244. 

  245. DECLARE_ALIGNED(8, const uint64_t, ff_bgr24toY1Coeff) = 0x0C88000040870C88ULL;

  246. DECLARE_ALIGNED(8, const uint64_t, ff_bgr24toY2Coeff) = 0x20DE4087000020DEULL;

  247. DECLARE_ALIGNED(8, const uint64_t, ff_rgb24toY1Coeff) = 0x20DE0000408720DEULL;

  248. DECLARE_ALIGNED(8, const uint64_t, ff_rgb24toY2Coeff) = 0x0C88408700000C88ULL;

  249. DECLARE_ALIGNED(8, const uint64_t, ff_bgr24toYOffset) = 0x0008400000084000ULL;

  250. 

  251. DECLARE_ALIGNED(8, const uint64_t, ff_bgr24toUV[2][4]) = {

  252.     {0x38380000DAC83838ULL, 0xECFFDAC80000ECFFULL, 0xF6E40000D0E3F6E4ULL, 0x3838D0E300003838ULL},

  253.     {0xECFF0000DAC8ECFFULL, 0x3838DAC800003838ULL, 0x38380000D0E33838ULL, 0xF6E4D0E30000F6E4ULL},

  254. };

  255. 

  256. DECLARE_ALIGNED(8, const uint64_t, ff_bgr24toUVOffset)= 0x0040400000404000ULL;

  257. 

  258. #endif /* defined(ARCH_X86) */

  259. 

  260. // clipping helper table for C implementations:

  261. static unsigned char clip_table[768];

  262. 

  263. static SwsVector *sws_getConvVec(SwsVector *a, SwsVector *b);

  264. 

  265. const uint8_t  __attribute__((aligned(8))) dither_2x2_4[2][8]={

  266. {  1,   3,   1,   3,   1,   3,   1,   3, },

  267. {  2,   0,   2,   0,   2,   0,   2,   0, },

  268. };

  269. 

  270. const uint8_t  __attribute__((aligned(8))) dither_2x2_8[2][8]={

  271. {  6,   2,   6,   2,   6,   2,   6,   2, },

  272. {  0,   4,   0,   4,   0,   4,   0,   4, },

  273. };

  274. 

  275. const uint8_t  __attribute__((aligned(8))) dither_8x8_32[8][8]={

  276. { 17,   9,  23,  15,  16,   8,  22,  14, },

  277. {  5,  29,   3,  27,   4,  28,   2,  26, },

  278. { 21,  13,  19,  11,  20,  12,  18,  10, },

  279. {  0,  24,   6,  30,   1,  25,   7,  31, },

  280. { 16,   8,  22,  14,  17,   9,  23,  15, },

  281. {  4,  28,   2,  26,   5,  29,   3,  27, },

  282. { 20,  12,  18,  10,  21,  13,  19,  11, },

  283. {  1,  25,   7,  31,   0,  24,   6,  30, },

  284. };

  285. 

  286. #if 0

  287. const uint8_t  __attribute__((aligned(8))) dither_8x8_64[8][8]={

  288. {  0,  48,  12,  60,   3,  51,  15,  63, },

  289. { 32,  16,  44,  28,  35,  19,  47,  31, },

  290. {  8,  56,   4,  52,  11,  59,   7,  55, },

  291. { 40,  24,  36,  20,  43,  27,  39,  23, },

  292. {  2,  50,  14,  62,   1,  49,  13,  61, },

  293. { 34,  18,  46,  30,  33,  17,  45,  29, },

  294. { 10,  58,   6,  54,   9,  57,   5,  53, },

  295. { 42,  26,  38,  22,  41,  25,  37,  21, },

  296. };

  297. #endif

  298. 

  299. const uint8_t  __attribute__((aligned(8))) dither_8x8_73[8][8]={

  300. {  0,  55,  14,  68,   3,  58,  17,  72, },

  301. { 37,  18,  50,  32,  40,  22,  54,  35, },

  302. {  9,  64,   5,  59,  13,  67,   8,  63, },

  303. { 46,  27,  41,  23,  49,  31,  44,  26, },

  304. {  2,  57,  16,  71,   1,  56,  15,  70, },

  305. { 39,  21,  52,  34,  38,  19,  51,  33, },

  306. { 11,  66,   7,  62,  10,  65,   6,  60, },

  307. { 48,  30,  43,  25,  47,  29,  42,  24, },

  308. };

  309. 

  310. #if 0

  311. const uint8_t  __attribute__((aligned(8))) dither_8x8_128[8][8]={

  312. { 68,  36,  92,  60,  66,  34,  90,  58, },

  313. { 20, 116,  12, 108,  18, 114,  10, 106, },

  314. { 84,  52,  76,  44,  82,  50,  74,  42, },

  315. {  0,  96,  24, 120,   6, 102,  30, 126, },

  316. { 64,  32,  88,  56,  70,  38,  94,  62, },

  317. { 16, 112,   8, 104,  22, 118,  14, 110, },

  318. { 80,  48,  72,  40,  86,  54,  78,  46, },

  319. {  4, 100,  28, 124,   2,  98,  26, 122, },

  320. };

  321. #endif

  322. 

  323. #if 1

  324. const uint8_t  __attribute__((aligned(8))) dither_8x8_220[8][8]={

  325. {117,  62, 158, 103, 113,  58, 155, 100, },

  326. { 34, 199,  21, 186,  31, 196,  17, 182, },

  327. {144,  89, 131,  76, 141,  86, 127,  72, },

  328. {  0, 165,  41, 206,  10, 175,  52, 217, },

  329. {110,  55, 151,  96, 120,  65, 162, 107, },

  330. { 28, 193,  14, 179,  38, 203,  24, 189, },

  331. {138,  83, 124,  69, 148,  93, 134,  79, },

  332. {  7, 172,  48, 213,   3, 168,  45, 210, },

  333. };

  334. #elif 1

  335. // tries to correct a gamma of 1.5

  336. const uint8_t  __attribute__((aligned(8))) dither_8x8_220[8][8]={

  337. {  0, 143,  18, 200,   2, 156,  25, 215, },

  338. { 78,  28, 125,  64,  89,  36, 138,  74, },

  339. { 10, 180,   3, 161,  16, 195,   8, 175, },

  340. {109,  51,  93,  38, 121,  60, 105,  47, },

  341. {  1, 152,  23, 210,   0, 147,  20, 205, },

  342. { 85,  33, 134,  71,  81,  30, 130,  67, },

  343. { 14, 190,   6, 171,  12, 185,   5, 166, },

  344. {117,  57, 101,  44, 113,  54,  97,  41, },

  345. };

  346. #elif 1

  347. // tries to correct a gamma of 2.0

  348. const uint8_t  __attribute__((aligned(8))) dither_8x8_220[8][8]={

  349. {  0, 124,   8, 193,   0, 140,  12, 213, },

  350. { 55,  14, 104,  42,  66,  19, 119,  52, },

  351. {  3, 168,   1, 145,   6, 187,   3, 162, },

  352. { 86,  31,  70,  21,  99,  39,  82,  28, },

  353. {  0, 134,  11, 206,   0, 129,   9, 200, },

  354. { 62,  17, 114,  48,  58,  16, 109,  45, },

  355. {  5, 181,   2, 157,   4, 175,   1, 151, },

  356. { 95,  36,  78,  26,  90,  34,  74,  24, },

  357. };

  358. #else

  359. // tries to correct a gamma of 2.5

  360. const uint8_t  __attribute__((aligned(8))) dither_8x8_220[8][8]={

  361. {  0, 107,   3, 187,   0, 125,   6, 212, },

  362. { 39,   7,  86,  28,  49,  11, 102,  36, },

  363. {  1, 158,   0, 131,   3, 180,   1, 151, },

  364. { 68,  19,  52,  12,  81,  25,  64,  17, },

  365. {  0, 119,   5, 203,   0, 113,   4, 195, },

  366. { 45,   9,  96,  33,  42,   8,  91,  30, },

  367. {  2, 172,   1, 144,   2, 165,   0, 137, },

  368. { 77,  23,  60,  15,  72,  21,  56,  14, },

  369. };

  370. #endif

  371. 

  372. const char *sws_format_name(enum PixelFormat format)

  373. {

  374.     switch (format) {

  375.         case PIX_FMT_YUV420P:

  376.             return "yuv420p";

  377.         case PIX_FMT_YUVA420P:

  378.             return "yuva420p";

  379.         case PIX_FMT_YUYV422:

  380.             return "yuyv422";

  381.         case PIX_FMT_RGB24:

  382.             return "rgb24";

  383.         case PIX_FMT_BGR24:

  384.             return "bgr24";

  385.         case PIX_FMT_YUV422P:

  386.             return "yuv422p";

  387.         case PIX_FMT_YUV444P:

  388.             return "yuv444p";

  389.         case PIX_FMT_RGB32:

  390.             return "rgb32";

  391.         case PIX_FMT_YUV410P:

  392.             return "yuv410p";

  393.         case PIX_FMT_YUV411P:

  394.             return "yuv411p";

  395.         case PIX_FMT_RGB565:

  396.             return "rgb565";

  397.         case PIX_FMT_RGB555:

  398.             return "rgb555";

  399.         case PIX_FMT_GRAY16BE:

  400.             return "gray16be";

  401.         case PIX_FMT_GRAY16LE:

  402.             return "gray16le";

  403.         case PIX_FMT_GRAY8:

  404.             return "gray8";

  405.         case PIX_FMT_MONOWHITE:

  406.             return "mono white";

  407.         case PIX_FMT_MONOBLACK:

  408.             return "mono black";

  409.         case PIX_FMT_PAL8:

  410.             return "Palette";

  411.         case PIX_FMT_YUVJ420P:

  412.             return "yuvj420p";

  413.         case PIX_FMT_YUVJ422P:

  414.             return "yuvj422p";

  415.         case PIX_FMT_YUVJ444P:

  416.             return "yuvj444p";

  417.         case PIX_FMT_XVMC_MPEG2_MC:

  418.             return "xvmc_mpeg2_mc";

  419.         case PIX_FMT_XVMC_MPEG2_IDCT:

  420.             return "xvmc_mpeg2_idct";

  421.         case PIX_FMT_UYVY422:

  422.             return "uyvy422";

  423.         case PIX_FMT_UYYVYY411:

  424.             return "uyyvyy411";

  425.         case PIX_FMT_RGB32_1:

  426.             return "rgb32x";

  427.         case PIX_FMT_BGR32_1:

  428.             return "bgr32x";

  429.         case PIX_FMT_BGR32:

  430.             return "bgr32";

  431.         case PIX_FMT_BGR565:

  432.             return "bgr565";

  433.         case PIX_FMT_BGR555:

  434.             return "bgr555";

  435.         case PIX_FMT_BGR8:

  436.             return "bgr8";

  437.         case PIX_FMT_BGR4:

  438.             return "bgr4";

  439.         case PIX_FMT_BGR4_BYTE:

  440.             return "bgr4 byte";

  441.         case PIX_FMT_RGB8:

  442.             return "rgb8";

  443.         case PIX_FMT_RGB4:

  444.             return "rgb4";

  445.         case PIX_FMT_RGB4_BYTE:

  446.             return "rgb4 byte";

  447.         case PIX_FMT_NV12:

  448.             return "nv12";

  449.         case PIX_FMT_NV21:

  450.             return "nv21";

  451.         case PIX_FMT_YUV440P:

  452.             return "yuv440p";

  453.         default:

  454.             return "Unknown format";

  455.     }

  456. }

  457. 

  458. static inline void yuv2yuvXinC(int16_t *lumFilter, int16_t **lumSrc, int lumFilterSize,

  459.                                int16_t *chrFilter, int16_t **chrSrc, int chrFilterSize,

  460.                                uint8_t *dest, uint8_t *uDest, uint8_t *vDest, int dstW, int chrDstW)

  461. {

  462.     //FIXME Optimize (just quickly writen not opti..)

  463.     int i;

  464.     for (i=0; i<dstW; i++)

  465.     {

  466.         int val=1<<18;

  467.         int j;

  468.         for (j=0; j<lumFilterSize; j++)

  469.             val += lumSrc[j][i] * lumFilter[j];

  470. 

  471.         dest[i]= av_clip_uint8(val>>19);

  472.     }

  473. 

  474.     if (uDest)

  475.         for (i=0; i<chrDstW; i++)

  476.         {

  477.             int u=1<<18;

  478.             int v=1<<18;

  479.             int j;

  480.             for (j=0; j<chrFilterSize; j++)

  481.             {

  482.                 u += chrSrc[j][i] * chrFilter[j];

  483.                 v += chrSrc[j][i + VOFW] * chrFilter[j];

  484.             }

  485. 

  486.             uDest[i]= av_clip_uint8(u>>19);

  487.             vDest[i]= av_clip_uint8(v>>19);

  488.         }

  489. }

  490. 

  491. static inline void yuv2nv12XinC(int16_t *lumFilter, int16_t **lumSrc, int lumFilterSize,

  492.                                 int16_t *chrFilter, int16_t **chrSrc, int chrFilterSize,

  493.                                 uint8_t *dest, uint8_t *uDest, int dstW, int chrDstW, int dstFormat)

  494. {

  495.     //FIXME Optimize (just quickly writen not opti..)

  496.     int i;

  497.     for (i=0; i<dstW; i++)

  498.     {

  499.         int val=1<<18;

  500.         int j;

  501.         for (j=0; j<lumFilterSize; j++)

  502.             val += lumSrc[j][i] * lumFilter[j];

  503. 

  504.         dest[i]= av_clip_uint8(val>>19);

  505.     }

  506. 

  507.     if (!uDest)

  508.         return;

  509. 

  510.     if (dstFormat == PIX_FMT_NV12)

  511.         for (i=0; i<chrDstW; i++)

  512.         {

  513.             int u=1<<18;

  514.             int v=1<<18;

  515.             int j;

  516.             for (j=0; j<chrFilterSize; j++)

  517.             {

  518.                 u += chrSrc[j][i] * chrFilter[j];

  519.                 v += chrSrc[j][i + VOFW] * chrFilter[j];

  520.             }

  521. 

  522.             uDest[2*i]= av_clip_uint8(u>>19);

  523.             uDest[2*i+1]= av_clip_uint8(v>>19);

  524.         }

  525.     else

  526.         for (i=0; i<chrDstW; i++)

  527.         {

  528.             int u=1<<18;

  529.             int v=1<<18;

  530.             int j;

  531.             for (j=0; j<chrFilterSize; j++)

  532.             {

  533.                 u += chrSrc[j][i] * chrFilter[j];

  534.                 v += chrSrc[j][i + VOFW] * chrFilter[j];

  535.             }

  536. 

  537.             uDest[2*i]= av_clip_uint8(v>>19);

  538.             uDest[2*i+1]= av_clip_uint8(u>>19);

  539.         }

  540. }

  541. 

  542. #define YSCALE_YUV_2_PACKEDX_NOCLIP_C(type) \

  543.     for (i=0; i<(dstW>>1); i++){\

  544.         int j;\

  545.         int Y1 = 1<<18;\

  546.         int Y2 = 1<<18;\

  547.         int U  = 1<<18;\

  548.         int V  = 1<<18;\

  549.         type av_unused *r, *b, *g;\

  550.         const int i2= 2*i;\

  551.         \

  552.         for (j=0; j<lumFilterSize; j++)\

  553.         {\

  554.             Y1 += lumSrc[j][i2] * lumFilter[j];\

  555.             Y2 += lumSrc[j][i2+1] * lumFilter[j];\

  556.         }\

  557.         for (j=0; j<chrFilterSize; j++)\

  558.         {\

  559.             U += chrSrc[j][i] * chrFilter[j];\

  560.             V += chrSrc[j][i+VOFW] * chrFilter[j];\

  561.         }\

  562.         Y1>>=19;\

  563.         Y2>>=19;\

  564.         U >>=19;\

  565.         V >>=19;\

  566. 

  567. #define YSCALE_YUV_2_PACKEDX_C(type) \

  568.         YSCALE_YUV_2_PACKEDX_NOCLIP_C(type)\

  569.         if ((Y1|Y2|U|V)&256)\

  570.         {\

  571.             if (Y1>255)   Y1=255; \

  572.             else if (Y1<0)Y1=0;   \

  573.             if (Y2>255)   Y2=255; \

  574.             else if (Y2<0)Y2=0;   \

  575.             if (U>255)    U=255;  \

  576.             else if (U<0) U=0;    \

  577.             if (V>255)    V=255;  \

  578.             else if (V<0) V=0;    \

  579.         }

  580. 

  581. #define YSCALE_YUV_2_PACKEDX_FULL_C \

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

  583.         int j;\

  584.         int Y = 0;\

  585.         int U = -128<<19;\

  586.         int V = -128<<19;\

  587.         int R,G,B;\

  588.         \

  589.         for (j=0; j<lumFilterSize; j++){\

  590.             Y += lumSrc[j][i     ] * lumFilter[j];\

  591.         }\

  592.         for (j=0; j<chrFilterSize; j++){\

  593.             U += chrSrc[j][i     ] * chrFilter[j];\

  594.             V += chrSrc[j][i+VOFW] * chrFilter[j];\

  595.         }\

  596.         Y >>=10;\

  597.         U >>=10;\

  598.         V >>=10;\

  599. 

  600. #define YSCALE_YUV_2_RGBX_FULL_C(rnd) \

  601.     YSCALE_YUV_2_PACKEDX_FULL_C\

  602.         Y-= c->yuv2rgb_y_offset;\

  603.         Y*= c->yuv2rgb_y_coeff;\

  604.         Y+= rnd;\

  605.         R= Y + V*c->yuv2rgb_v2r_coeff;\

  606.         G= Y + V*c->yuv2rgb_v2g_coeff + U*c->yuv2rgb_u2g_coeff;\

  607.         B= Y +                          U*c->yuv2rgb_u2b_coeff;\

  608.         if ((R|G|B)&(0xC0000000)){\

  609.             if (R>=(256<<22))   R=(256<<22)-1; \

  610.             else if (R<0)R=0;   \

  611.             if (G>=(256<<22))   G=(256<<22)-1; \

  612.             else if (G<0)G=0;   \

  613.             if (B>=(256<<22))   B=(256<<22)-1; \

  614.             else if (B<0)B=0;   \

  615.         }\

  616. 

  617. 

  618. #define YSCALE_YUV_2_GRAY16_C \

  619.     for (i=0; i<(dstW>>1); i++){\

  620.         int j;\

  621.         int Y1 = 1<<18;\

  622.         int Y2 = 1<<18;\

  623.         int U  = 1<<18;\

  624.         int V  = 1<<18;\

  625.         \

  626.         const int i2= 2*i;\

  627.         \

  628.         for (j=0; j<lumFilterSize; j++)\

  629.         {\

  630.             Y1 += lumSrc[j][i2] * lumFilter[j];\

  631.             Y2 += lumSrc[j][i2+1] * lumFilter[j];\

  632.         }\

  633.         Y1>>=11;\

  634.         Y2>>=11;\

  635.         if ((Y1|Y2|U|V)&65536)\

  636.         {\

  637.             if (Y1>65535)   Y1=65535; \

  638.             else if (Y1<0)Y1=0;   \

  639.             if (Y2>65535)   Y2=65535; \

  640.             else if (Y2<0)Y2=0;   \

  641.         }

  642. 

  643. #define YSCALE_YUV_2_RGBX_C(type) \

  644.     YSCALE_YUV_2_PACKEDX_C(type)  /* FIXME fix tables so that cliping is not needed and then use _NOCLIP*/\

  645.     r = (type *)c->table_rV[V];   \

  646.     g = (type *)(c->table_gU[U] + c->table_gV[V]); \

  647.     b = (type *)c->table_bU[U];   \

  648. 

  649. #define YSCALE_YUV_2_PACKED2_C   \

  650.     for (i=0; i<(dstW>>1); i++){ \

  651.         const int i2= 2*i;       \

  652.         int Y1= (buf0[i2  ]*yalpha1+buf1[i2  ]*yalpha)>>19;           \

  653.         int Y2= (buf0[i2+1]*yalpha1+buf1[i2+1]*yalpha)>>19;           \

  654.         int U= (uvbuf0[i     ]*uvalpha1+uvbuf1[i     ]*uvalpha)>>19;  \

  655.         int V= (uvbuf0[i+VOFW]*uvalpha1+uvbuf1[i+VOFW]*uvalpha)>>19;  \

  656. 

  657. #define YSCALE_YUV_2_GRAY16_2_C   \

  658.     for (i=0; i<(dstW>>1); i++){ \

  659.         const int i2= 2*i;       \

  660.         int Y1= (buf0[i2  ]*yalpha1+buf1[i2  ]*yalpha)>>11;           \

  661.         int Y2= (buf0[i2+1]*yalpha1+buf1[i2+1]*yalpha)>>11;           \

  662. 

  663. #define YSCALE_YUV_2_RGB2_C(type) \

  664.     YSCALE_YUV_2_PACKED2_C\

  665.     type *r, *b, *g;\

  666.     r = (type *)c->table_rV[V];\

  667.     g = (type *)(c->table_gU[U] + c->table_gV[V]);\

  668.     b = (type *)c->table_bU[U];\

  669. 

  670. #define YSCALE_YUV_2_PACKED1_C \

  671.     for (i=0; i<(dstW>>1); i++){\

  672.         const int i2= 2*i;\

  673.         int Y1= buf0[i2  ]>>7;\

  674.         int Y2= buf0[i2+1]>>7;\

  675.         int U= (uvbuf1[i     ])>>7;\

  676.         int V= (uvbuf1[i+VOFW])>>7;\

  677. 

  678. #define YSCALE_YUV_2_GRAY16_1_C \

  679.     for (i=0; i<(dstW>>1); i++){\

  680.         const int i2= 2*i;\

  681.         int Y1= buf0[i2  ]<<1;\

  682.         int Y2= buf0[i2+1]<<1;\

  683. 

  684. #define YSCALE_YUV_2_RGB1_C(type) \

  685.     YSCALE_YUV_2_PACKED1_C\

  686.     type *r, *b, *g;\

  687.     r = (type *)c->table_rV[V];\

  688.     g = (type *)(c->table_gU[U] + c->table_gV[V]);\

  689.     b = (type *)c->table_bU[U];\

  690. 

  691. #define YSCALE_YUV_2_PACKED1B_C \

  692.     for (i=0; i<(dstW>>1); i++){\

  693.         const int i2= 2*i;\

  694.         int Y1= buf0[i2  ]>>7;\

  695.         int Y2= buf0[i2+1]>>7;\

  696.         int U= (uvbuf0[i     ] + uvbuf1[i     ])>>8;\

  697.         int V= (uvbuf0[i+VOFW] + uvbuf1[i+VOFW])>>8;\

  698. 

  699. #define YSCALE_YUV_2_RGB1B_C(type) \

  700.     YSCALE_YUV_2_PACKED1B_C\

  701.     type *r, *b, *g;\

  702.     r = (type *)c->table_rV[V];\

  703.     g = (type *)(c->table_gU[U] + c->table_gV[V]);\

  704.     b = (type *)c->table_bU[U];\

  705. 

  706. #define YSCALE_YUV_2_MONO2_C \

  707.     const uint8_t * const d128=dither_8x8_220[y&7];\

  708.     uint8_t *g= c->table_gU[128] + c->table_gV[128];\

  709.     for (i=0; i<dstW-7; i+=8){\

  710.         int acc;\

  711.         acc =       g[((buf0[i  ]*yalpha1+buf1[i  ]*yalpha)>>19) + d128[0]];\

  712.         acc+= acc + g[((buf0[i+1]*yalpha1+buf1[i+1]*yalpha)>>19) + d128[1]];\

  713.         acc+= acc + g[((buf0[i+2]*yalpha1+buf1[i+2]*yalpha)>>19) + d128[2]];\

  714.         acc+= acc + g[((buf0[i+3]*yalpha1+buf1[i+3]*yalpha)>>19) + d128[3]];\

  715.         acc+= acc + g[((buf0[i+4]*yalpha1+buf1[i+4]*yalpha)>>19) + d128[4]];\

  716.         acc+= acc + g[((buf0[i+5]*yalpha1+buf1[i+5]*yalpha)>>19) + d128[5]];\

  717.         acc+= acc + g[((buf0[i+6]*yalpha1+buf1[i+6]*yalpha)>>19) + d128[6]];\

  718.         acc+= acc + g[((buf0[i+7]*yalpha1+buf1[i+7]*yalpha)>>19) + d128[7]];\

  719.         ((uint8_t*)dest)[0]= c->dstFormat == PIX_FMT_MONOBLACK ? acc : ~acc;\

  720.         dest++;\

  721.     }\

  722. 

  723. 

  724. #define YSCALE_YUV_2_MONOX_C \

  725.     const uint8_t * const d128=dither_8x8_220[y&7];\

  726.     uint8_t *g= c->table_gU[128] + c->table_gV[128];\

  727.     int acc=0;\

  728.     for (i=0; i<dstW-1; i+=2){\

  729.         int j;\

  730.         int Y1=1<<18;\

  731.         int Y2=1<<18;\

  732. \

  733.         for (j=0; j<lumFilterSize; j++)\

  734.         {\

  735.             Y1 += lumSrc[j][i] * lumFilter[j];\

  736.             Y2 += lumSrc[j][i+1] * lumFilter[j];\

  737.         }\

  738.         Y1>>=19;\

  739.         Y2>>=19;\

  740.         if ((Y1|Y2)&256)\

  741.         {\

  742.             if (Y1>255)   Y1=255;\

  743.             else if (Y1<0)Y1=0;\

  744.             if (Y2>255)   Y2=255;\

  745.             else if (Y2<0)Y2=0;\

  746.         }\

  747.         acc+= acc + g[Y1+d128[(i+0)&7]];\

  748.         acc+= acc + g[Y2+d128[(i+1)&7]];\

  749.         if ((i&7)==6){\

  750.             ((uint8_t*)dest)[0]= c->dstFormat == PIX_FMT_MONOBLACK ? acc : ~acc;\

  751.             dest++;\

  752.         }\

  753.     }

  754. 

  755. 

  756. #define YSCALE_YUV_2_ANYRGB_C(func, func2, func_g16, func_monoblack)\

  757.     switch(c->dstFormat)\

  758.     {\

  759.     case PIX_FMT_RGB32:\

  760.     case PIX_FMT_BGR32:\

  761.     case PIX_FMT_RGB32_1:\

  762.     case PIX_FMT_BGR32_1:\

  763.         func(uint32_t)\

  764.             ((uint32_t*)dest)[i2+0]= r[Y1] + g[Y1] + b[Y1];\

  765.             ((uint32_t*)dest)[i2+1]= r[Y2] + g[Y2] + b[Y2];\

  766.         }                \

  767.         break;\

  768.     case PIX_FMT_RGB24:\

  769.         func(uint8_t)\

  770.             ((uint8_t*)dest)[0]= r[Y1];\

  771.             ((uint8_t*)dest)[1]= g[Y1];\

  772.             ((uint8_t*)dest)[2]= b[Y1];\

  773.             ((uint8_t*)dest)[3]= r[Y2];\

  774.             ((uint8_t*)dest)[4]= g[Y2];\

  775.             ((uint8_t*)dest)[5]= b[Y2];\

  776.             dest+=6;\

  777.         }\

  778.         break;\

  779.     case PIX_FMT_BGR24:\

  780.         func(uint8_t)\

  781.             ((uint8_t*)dest)[0]= b[Y1];\

  782.             ((uint8_t*)dest)[1]= g[Y1];\

  783.             ((uint8_t*)dest)[2]= r[Y1];\

  784.             ((uint8_t*)dest)[3]= b[Y2];\

  785.             ((uint8_t*)dest)[4]= g[Y2];\

  786.             ((uint8_t*)dest)[5]= r[Y2];\

  787.             dest+=6;\

  788.         }\

  789.         break;\

  790.     case PIX_FMT_RGB565:\

  791.     case PIX_FMT_BGR565:\

  792.         {\

  793.             const int dr1= dither_2x2_8[y&1    ][0];\

  794.             const int dg1= dither_2x2_4[y&1    ][0];\

  795.             const int db1= dither_2x2_8[(y&1)^1][0];\

  796.             const int dr2= dither_2x2_8[y&1    ][1];\

  797.             const int dg2= dither_2x2_4[y&1    ][1];\

  798.             const int db2= dither_2x2_8[(y&1)^1][1];\

  799.             func(uint16_t)\

  800.                 ((uint16_t*)dest)[i2+0]= r[Y1+dr1] + g[Y1+dg1] + b[Y1+db1];\

  801.                 ((uint16_t*)dest)[i2+1]= r[Y2+dr2] + g[Y2+dg2] + b[Y2+db2];\

  802.             }\

  803.         }\

  804.         break;\

  805.     case PIX_FMT_RGB555:\

  806.     case PIX_FMT_BGR555:\

  807.         {\

  808.             const int dr1= dither_2x2_8[y&1    ][0];\

  809.             const int dg1= dither_2x2_8[y&1    ][1];\

  810.             const int db1= dither_2x2_8[(y&1)^1][0];\

  811.             const int dr2= dither_2x2_8[y&1    ][1];\

  812.             const int dg2= dither_2x2_8[y&1    ][0];\

  813.             const int db2= dither_2x2_8[(y&1)^1][1];\

  814.             func(uint16_t)\

  815.                 ((uint16_t*)dest)[i2+0]= r[Y1+dr1] + g[Y1+dg1] + b[Y1+db1];\

  816.                 ((uint16_t*)dest)[i2+1]= r[Y2+dr2] + g[Y2+dg2] + b[Y2+db2];\

  817.             }\

  818.         }\

  819.         break;\

  820.     case PIX_FMT_RGB8:\

  821.     case PIX_FMT_BGR8:\

  822.         {\

  823.             const uint8_t * const d64= dither_8x8_73[y&7];\

  824.             const uint8_t * const d32= dither_8x8_32[y&7];\

  825.             func(uint8_t)\

  826.                 ((uint8_t*)dest)[i2+0]= r[Y1+d32[(i2+0)&7]] + g[Y1+d32[(i2+0)&7]] + b[Y1+d64[(i2+0)&7]];\

  827.                 ((uint8_t*)dest)[i2+1]= r[Y2+d32[(i2+1)&7]] + g[Y2+d32[(i2+1)&7]] + b[Y2+d64[(i2+1)&7]];\

  828.             }\

  829.         }\

  830.         break;\

  831.     case PIX_FMT_RGB4:\

  832.     case PIX_FMT_BGR4:\

  833.         {\

  834.             const uint8_t * const d64= dither_8x8_73 [y&7];\

  835.             const uint8_t * const d128=dither_8x8_220[y&7];\

  836.             func(uint8_t)\

  837.                 ((uint8_t*)dest)[i]= r[Y1+d128[(i2+0)&7]] + g[Y1+d64[(i2+0)&7]] + b[Y1+d128[(i2+0)&7]]\

  838.                                  + ((r[Y2+d128[(i2+1)&7]] + g[Y2+d64[(i2+1)&7]] + b[Y2+d128[(i2+1)&7]])<<4);\

  839.             }\

  840.         }\

  841.         break;\

  842.     case PIX_FMT_RGB4_BYTE:\

  843.     case PIX_FMT_BGR4_BYTE:\

  844.         {\

  845.             const uint8_t * const d64= dither_8x8_73 [y&7];\

  846.             const uint8_t * const d128=dither_8x8_220[y&7];\

  847.             func(uint8_t)\

  848.                 ((uint8_t*)dest)[i2+0]= r[Y1+d128[(i2+0)&7]] + g[Y1+d64[(i2+0)&7]] + b[Y1+d128[(i2+0)&7]];\

  849.                 ((uint8_t*)dest)[i2+1]= r[Y2+d128[(i2+1)&7]] + g[Y2+d64[(i2+1)&7]] + b[Y2+d128[(i2+1)&7]];\

  850.             }\

  851.         }\

  852.         break;\

  853.     case PIX_FMT_MONOBLACK:\

  854.     case PIX_FMT_MONOWHITE:\

  855.         {\

  856.             func_monoblack\

  857.         }\

  858.         break;\

  859.     case PIX_FMT_YUYV422:\

  860.         func2\

  861.             ((uint8_t*)dest)[2*i2+0]= Y1;\

  862.             ((uint8_t*)dest)[2*i2+1]= U;\

  863.             ((uint8_t*)dest)[2*i2+2]= Y2;\

  864.             ((uint8_t*)dest)[2*i2+3]= V;\

  865.         }                \

  866.         break;\

  867.     case PIX_FMT_UYVY422:\

  868.         func2\

  869.             ((uint8_t*)dest)[2*i2+0]= U;\

  870.             ((uint8_t*)dest)[2*i2+1]= Y1;\

  871.             ((uint8_t*)dest)[2*i2+2]= V;\

  872.             ((uint8_t*)dest)[2*i2+3]= Y2;\

  873.         }                \

  874.         break;\

  875.     case PIX_FMT_GRAY16BE:\

  876.         func_g16\

  877.             ((uint8_t*)dest)[2*i2+0]= Y1>>8;\

  878.             ((uint8_t*)dest)[2*i2+1]= Y1;\

  879.             ((uint8_t*)dest)[2*i2+2]= Y2>>8;\

  880.             ((uint8_t*)dest)[2*i2+3]= Y2;\

  881.         }                \

  882.         break;\

  883.     case PIX_FMT_GRAY16LE:\

  884.         func_g16\

  885.             ((uint8_t*)dest)[2*i2+0]= Y1;\

  886.             ((uint8_t*)dest)[2*i2+1]= Y1>>8;\

  887.             ((uint8_t*)dest)[2*i2+2]= Y2;\

  888.             ((uint8_t*)dest)[2*i2+3]= Y2>>8;\

  889.         }                \

  890.         break;\

  891.     }\

  892. 

  893. 

  894. static inline void yuv2packedXinC(SwsContext *c, int16_t *lumFilter, int16_t **lumSrc, int lumFilterSize,

  895.                                   int16_t *chrFilter, int16_t **chrSrc, int chrFilterSize,

  896.                                   uint8_t *dest, int dstW, int y)

  897. {

  898.     int i;

  899.     YSCALE_YUV_2_ANYRGB_C(YSCALE_YUV_2_RGBX_C, YSCALE_YUV_2_PACKEDX_C(void), YSCALE_YUV_2_GRAY16_C, YSCALE_YUV_2_MONOX_C)

  900. }

  901. 

  902. static inline void yuv2rgbXinC_full(SwsContext *c, int16_t *lumFilter, int16_t **lumSrc, int lumFilterSize,

  903.                                     int16_t *chrFilter, int16_t **chrSrc, int chrFilterSize,

  904.                                     uint8_t *dest, int dstW, int y)

  905. {

  906.     int i;

  907.     int step= fmt_depth(c->dstFormat)/8;

  908. 

  909.     switch(c->dstFormat){

  910.     case PIX_FMT_ARGB:

  911.         dest++;

  912.     case PIX_FMT_RGB24:

  913.     case PIX_FMT_RGBA:

  914.         YSCALE_YUV_2_RGBX_FULL_C(1<<21)

  915.             dest[0]= R>>22;

  916.             dest[1]= G>>22;

  917.             dest[2]= B>>22;

  918.             dest[3]= 0;

  919.             dest+= step;

  920.         }

  921.         break;

  922.     case PIX_FMT_ABGR:

  923.         dest++;

  924.     case PIX_FMT_BGR24:

  925.     case PIX_FMT_BGRA:

  926.         YSCALE_YUV_2_RGBX_FULL_C(1<<21)

  927.             dest[0]= B>>22;

  928.             dest[1]= G>>22;

  929.             dest[2]= R>>22;

  930.             dest[3]= 0;

  931.             dest+= step;

  932.         }

  933.         break;

  934.     default:

  935.         assert(0);

  936.     }

  937. }

  938. 

  939. //Note: we have C, X86, MMX, MMX2, 3DNOW version therse no 3DNOW+MMX2 one

  940. //Plain C versions

  941. #if !defined (HAVE_MMX) || defined (RUNTIME_CPUDETECT) || !defined(CONFIG_GPL)

  942. #define COMPILE_C

  943. #endif

  944. 

  945. #ifdef ARCH_POWERPC

  946. #if (defined (HAVE_ALTIVEC) || defined (RUNTIME_CPUDETECT)) && defined (CONFIG_GPL)

  947. #define COMPILE_ALTIVEC

  948. #endif //HAVE_ALTIVEC

  949. #endif //ARCH_POWERPC

  950. 

  951. #if defined(ARCH_X86)

  952. 

  953. #if ((defined (HAVE_MMX) && !defined (HAVE_3DNOW) && !defined (HAVE_MMX2)) || defined (RUNTIME_CPUDETECT)) && defined (CONFIG_GPL)

  954. #define COMPILE_MMX

  955. #endif

  956. 

  957. #if (defined (HAVE_MMX2) || defined (RUNTIME_CPUDETECT)) && defined (CONFIG_GPL)

  958. #define COMPILE_MMX2

  959. #endif

  960. 

  961. #if ((defined (HAVE_3DNOW) && !defined (HAVE_MMX2)) || defined (RUNTIME_CPUDETECT)) && defined (CONFIG_GPL)

  962. #define COMPILE_3DNOW

  963. #endif

  964. #endif //ARCH_X86 || ARCH_X86_64

  965. 

  966. #undef HAVE_MMX

  967. #undef HAVE_MMX2

  968. #undef HAVE_3DNOW

  969. 

  970. #ifdef COMPILE_C

  971. #undef HAVE_MMX

  972. #undef HAVE_MMX2

  973. #undef HAVE_3DNOW

  974. #undef HAVE_ALTIVEC

  975. #define RENAME(a) a ## _C

  976. #include "swscale_template.c"

  977. #endif

  978. 

  979. #ifdef COMPILE_ALTIVEC

  980. #undef RENAME

  981. #define HAVE_ALTIVEC

  982. #define RENAME(a) a ## _altivec

  983. #include "swscale_template.c"

  984. #endif

  985. 

  986. #if defined(ARCH_X86)

  987. 

  988. //X86 versions

  989. /*

  990. #undef RENAME

  991. #undef HAVE_MMX

  992. #undef HAVE_MMX2

  993. #undef HAVE_3DNOW

  994. #define ARCH_X86

  995. #define RENAME(a) a ## _X86

  996. #include "swscale_template.c"

  997. */

  998. //MMX versions

  999. #ifdef COMPILE_MMX

  1000. #undef RENAME

  1001. #define HAVE_MMX

  1002. #undef HAVE_MMX2

  1003. #undef HAVE_3DNOW

  1004. #define RENAME(a) a ## _MMX

  1005. #include "swscale_template.c"

  1006. #endif

  1007. 

  1008. //MMX2 versions

  1009. #ifdef COMPILE_MMX2

  1010. #undef RENAME

  1011. #define HAVE_MMX

  1012. #define HAVE_MMX2

  1013. #undef HAVE_3DNOW

  1014. #define RENAME(a) a ## _MMX2

  1015. #include "swscale_template.c"

  1016. #endif

  1017. 

  1018. //3DNOW versions

  1019. #ifdef COMPILE_3DNOW

  1020. #undef RENAME

  1021. #define HAVE_MMX

  1022. #undef HAVE_MMX2

  1023. #define HAVE_3DNOW

  1024. #define RENAME(a) a ## _3DNow

  1025. #include "swscale_template.c"

  1026. #endif

  1027. 

  1028. #endif //ARCH_X86 || ARCH_X86_64

  1029. 

  1030. // minor note: the HAVE_xyz is messed up after that line so don't use it

  1031. 

  1032. static double getSplineCoeff(double a, double b, double c, double d, double dist)

  1033. {

  1034. //    printf("%f %f %f %f %f\n", a,b,c,d,dist);

  1035.     if (dist<=1.0)      return ((d*dist + c)*dist + b)*dist +a;

  1036.     else                return getSplineCoeff(        0.0,

  1037.                                              b+ 2.0*c + 3.0*d,

  1038.                                                     c + 3.0*d,

  1039.                                             -b- 3.0*c - 6.0*d,

  1040.                                             dist-1.0);

  1041. }

  1042. 

  1043. static inline int initFilter(int16_t **outFilter, int16_t **filterPos, int *outFilterSize, int xInc,

  1044.                              int srcW, int dstW, int filterAlign, int one, int flags,

  1045.                              SwsVector *srcFilter, SwsVector *dstFilter, double param[2])

  1046. {

  1047.     int i;

  1048.     int filterSize;

  1049.     int filter2Size;

  1050.     int minFilterSize;

  1051.     double *filter=NULL;

  1052.     double *filter2=NULL;

  1053.     int ret= -1;

  1054. #if defined(ARCH_X86)

  1055.     if (flags & SWS_CPU_CAPS_MMX)

  1056.         asm volatile("emms\n\t"::: "memory"); //FIXME this should not be required but it IS (even for non-MMX versions)

  1057. #endif

  1058. 

  1059.     // Note the +1 is for the MMXscaler which reads over the end

  1060.     *filterPos = av_malloc((dstW+1)*sizeof(int16_t));

  1061. 

  1062.     if (FFABS(xInc - 0x10000) <10) // unscaled

  1063.     {

  1064.         int i;

  1065.         filterSize= 1;

  1066.         filter= av_mallocz(dstW*sizeof(*filter)*filterSize);

  1067. 

  1068.         for (i=0; i<dstW; i++)

  1069.         {

  1070.             filter[i*filterSize]=1;

  1071.             (*filterPos)[i]=i;

  1072.         }

  1073. 

  1074.     }

  1075.     else if (flags&SWS_POINT) // lame looking point sampling mode

  1076.     {

  1077.         int i;

  1078.         int xDstInSrc;

  1079.         filterSize= 1;

  1080.         filter= av_malloc(dstW*sizeof(*filter)*filterSize);

  1081. 

  1082.         xDstInSrc= xInc/2 - 0x8000;

  1083.         for (i=0; i<dstW; i++)

  1084.         {

  1085.             int xx= (xDstInSrc - ((filterSize-1)<<15) + (1<<15))>>16;

  1086. 

  1087.             (*filterPos)[i]= xx;

  1088.             filter[i]= 1.0;

  1089.             xDstInSrc+= xInc;

  1090.         }

  1091.     }

  1092.     else if ((xInc <= (1<<16) && (flags&SWS_AREA)) || (flags&SWS_FAST_BILINEAR)) // bilinear upscale

  1093.     {

  1094.         int i;

  1095.         int xDstInSrc;

  1096.         if      (flags&SWS_BICUBIC) filterSize= 4;

  1097.         else if (flags&SWS_X      ) filterSize= 4;

  1098.         else                        filterSize= 2; // SWS_BILINEAR / SWS_AREA

  1099.         filter= av_malloc(dstW*sizeof(*filter)*filterSize);

  1100. 

  1101.         xDstInSrc= xInc/2 - 0x8000;

  1102.         for (i=0; i<dstW; i++)

  1103.         {

  1104.             int xx= (xDstInSrc - ((filterSize-1)<<15) + (1<<15))>>16;

  1105.             int j;

  1106. 

  1107.             (*filterPos)[i]= xx;

  1108.                 //Bilinear upscale / linear interpolate / Area averaging

  1109.                 for (j=0; j<filterSize; j++)

  1110.                 {

  1111.                     double d= FFABS((xx<<16) - xDstInSrc)/(double)(1<<16);

  1112.                     double coeff= 1.0 - d;

  1113.                     if (coeff<0) coeff=0;

  1114.                     filter[i*filterSize + j]= coeff;

  1115.                     xx++;

  1116.                 }

  1117.             xDstInSrc+= xInc;

  1118.         }

  1119.     }

  1120.     else

  1121.     {

  1122.         double xDstInSrc;

  1123.         double sizeFactor, filterSizeInSrc;

  1124.         const double xInc1= (double)xInc / (double)(1<<16);

  1125. 

  1126.         if      (flags&SWS_BICUBIC)      sizeFactor=  4.0;

  1127.         else if (flags&SWS_X)            sizeFactor=  8.0;

  1128.         else if (flags&SWS_AREA)         sizeFactor=  1.0; //downscale only, for upscale it is bilinear

  1129.         else if (flags&SWS_GAUSS)        sizeFactor=  8.0;   // infinite ;)

  1130.         else if (flags&SWS_LANCZOS)      sizeFactor= param[0] != SWS_PARAM_DEFAULT ? 2.0*param[0] : 6.0;

  1131.         else if (flags&SWS_SINC)         sizeFactor= 20.0; // infinite ;)

  1132.         else if (flags&SWS_SPLINE)       sizeFactor= 20.0;  // infinite ;)

  1133.         else if (flags&SWS_BILINEAR)     sizeFactor=  2.0;

  1134.         else {

  1135.             sizeFactor= 0.0; //GCC warning killer

  1136.             assert(0);

  1137.         }

  1138. 

  1139.         if (xInc1 <= 1.0)       filterSizeInSrc= sizeFactor; // upscale

  1140.         else                    filterSizeInSrc= sizeFactor*srcW / (double)dstW;

  1141. 

  1142.         filterSize= (int)ceil(1 + filterSizeInSrc); // will be reduced later if possible

  1143.         if (filterSize > srcW-2) filterSize=srcW-2;

  1144. 

  1145.         filter= av_malloc(dstW*sizeof(*filter)*filterSize);

  1146. 

  1147.         xDstInSrc= xInc1 / 2.0 - 0.5;

  1148.         for (i=0; i<dstW; i++)

  1149.         {

  1150.             int xx= (int)(xDstInSrc - (filterSize-1)*0.5 + 0.5);

  1151.             int j;

  1152.             (*filterPos)[i]= xx;

  1153.             for (j=0; j<filterSize; j++)

  1154.             {

  1155.                 double d= FFABS(xx - xDstInSrc)/filterSizeInSrc*sizeFactor;

  1156.                 double coeff;

  1157.                 if (flags & SWS_BICUBIC)

  1158.                 {

  1159.                     double B= param[0] != SWS_PARAM_DEFAULT ? param[0] : 0.0;

  1160.                     double C= param[1] != SWS_PARAM_DEFAULT ? param[1] : 0.6;

  1161. 

  1162.                     if (d<1.0)

  1163.                         coeff = (12-9*B-6*C)*d*d*d + (-18+12*B+6*C)*d*d + 6-2*B;

  1164.                     else if (d<2.0)

  1165.                         coeff = (-B-6*C)*d*d*d + (6*B+30*C)*d*d + (-12*B-48*C)*d +8*B+24*C;

  1166.                     else

  1167.                         coeff=0.0;

  1168.                 }

  1169. /*                else if (flags & SWS_X)

  1170.                 {

  1171.                     double p= param ? param*0.01 : 0.3;

  1172.                     coeff = d ? sin(d*PI)/(d*PI) : 1.0;

  1173.                     coeff*= pow(2.0, - p*d*d);

  1174.                 }*/

  1175.                 else if (flags & SWS_X)

  1176.                 {

  1177.                     double A= param[0] != SWS_PARAM_DEFAULT ? param[0] : 1.0;

  1178. 

  1179.                     if (d<1.0)

  1180.                         coeff = cos(d*PI);

  1181.                     else

  1182.                         coeff=-1.0;

  1183.                     if (coeff<0.0)      coeff= -pow(-coeff, A);

  1184.                     else                coeff=  pow( coeff, A);

  1185.                     coeff= coeff*0.5 + 0.5;

  1186.                 }

  1187.                 else if (flags & SWS_AREA)

  1188.                 {

  1189.                     double srcPixelSize= 1.0/xInc1;

  1190.                     if      (d + srcPixelSize/2 < 0.5) coeff= 1.0;

  1191.                     else if (d - srcPixelSize/2 < 0.5) coeff= (0.5-d)/srcPixelSize + 0.5;

  1192.                     else coeff=0.0;

  1193.                 }

  1194.                 else if (flags & SWS_GAUSS)

  1195.                 {

  1196.                     double p= param[0] != SWS_PARAM_DEFAULT ? param[0] : 3.0;

  1197.                     coeff = pow(2.0, - p*d*d);

  1198.                 }

  1199.                 else if (flags & SWS_SINC)

  1200.                 {

  1201.                     coeff = d ? sin(d*PI)/(d*PI) : 1.0;

  1202.                 }

  1203.                 else if (flags & SWS_LANCZOS)

  1204.                 {

  1205.                     double p= param[0] != SWS_PARAM_DEFAULT ? param[0] : 3.0;

  1206.                     coeff = d ? sin(d*PI)*sin(d*PI/p)/(d*d*PI*PI/p) : 1.0;

  1207.                     if (d>p) coeff=0;

  1208.                 }

  1209.                 else if (flags & SWS_BILINEAR)

  1210.                 {

  1211.                     coeff= 1.0 - d;

  1212.                     if (coeff<0) coeff=0;

  1213.                 }

  1214.                 else if (flags & SWS_SPLINE)

  1215.                 {

  1216.                     double p=-2.196152422706632;

  1217.                     coeff = getSplineCoeff(1.0, 0.0, p, -p-1.0, d);

  1218.                 }

  1219.                 else {

  1220.                     coeff= 0.0; //GCC warning killer

  1221.                     assert(0);

  1222.                 }

  1223. 

  1224.                 filter[i*filterSize + j]= coeff;

  1225.                 xx++;

  1226.             }

  1227.             xDstInSrc+= xInc1;

  1228.         }

  1229.     }

  1230. 

  1231.     /* apply src & dst Filter to filter -> filter2

  1232.        av_free(filter);

  1233.     */

  1234.     assert(filterSize>0);

  1235.     filter2Size= filterSize;

  1236.     if (srcFilter) filter2Size+= srcFilter->length - 1;

  1237.     if (dstFilter) filter2Size+= dstFilter->length - 1;

  1238.     assert(filter2Size>0);

  1239.     filter2= av_malloc(filter2Size*dstW*sizeof(*filter2));

  1240. 

  1241.     for (i=0; i<dstW; i++)

  1242.     {

  1243.         int j;

  1244.         SwsVector scaleFilter;

  1245.         SwsVector *outVec;

  1246. 

  1247.         scaleFilter.coeff= filter + i*filterSize;

  1248.         scaleFilter.length= filterSize;

  1249. 

  1250.         if (srcFilter) outVec= sws_getConvVec(srcFilter, &scaleFilter);

  1251.         else           outVec= &scaleFilter;

  1252. 

  1253.         assert(outVec->length == filter2Size);

  1254.         //FIXME dstFilter

  1255. 

  1256.         for (j=0; j<outVec->length; j++)

  1257.         {

  1258.             filter2[i*filter2Size + j]= outVec->coeff[j];

  1259.         }

  1260. 

  1261.         (*filterPos)[i]+= (filterSize-1)/2 - (filter2Size-1)/2;

  1262. 

  1263.         if (outVec != &scaleFilter) sws_freeVec(outVec);

  1264.     }

  1265.     av_freep(&filter);

  1266. 

  1267.     /* try to reduce the filter-size (step1 find size and shift left) */

  1268.     // Assume it is near normalized (*0.5 or *2.0 is OK but * 0.001 is not).

  1269.     minFilterSize= 0;

  1270.     for (i=dstW-1; i>=0; i--)

  1271.     {

  1272.         int min= filter2Size;

  1273.         int j;

  1274.         double cutOff=0.0;

  1275. 

  1276.         /* get rid off near zero elements on the left by shifting left */

  1277.         for (j=0; j<filter2Size; j++)

  1278.         {

  1279.             int k;

  1280.             cutOff += FFABS(filter2[i*filter2Size]);

  1281. 

  1282.             if (cutOff > SWS_MAX_REDUCE_CUTOFF) break;

  1283. 

  1284.             /* preserve monotonicity because the core can't handle the filter otherwise */

  1285.             if (i<dstW-1 && (*filterPos)[i] >= (*filterPos)[i+1]) break;

  1286. 

  1287.             // Move filter coeffs left

  1288.             for (k=1; k<filter2Size; k++)

  1289.                 filter2[i*filter2Size + k - 1]= filter2[i*filter2Size + k];

  1290.             filter2[i*filter2Size + k - 1]= 0.0;

  1291.             (*filterPos)[i]++;

  1292.         }

  1293. 

  1294.         cutOff=0.0;

  1295.         /* count near zeros on the right */

  1296.         for (j=filter2Size-1; j>0; j--)

  1297.         {

  1298.             cutOff += FFABS(filter2[i*filter2Size + j]);

  1299. 

  1300.             if (cutOff > SWS_MAX_REDUCE_CUTOFF) break;

  1301.             min--;

  1302.         }

  1303. 

  1304.         if (min>minFilterSize) minFilterSize= min;

  1305.     }

  1306. 

  1307.     if (flags & SWS_CPU_CAPS_ALTIVEC) {

  1308.         // we can handle the special case 4,

  1309.         // so we don't want to go to the full 8

  1310.         if (minFilterSize < 5)

  1311.             filterAlign = 4;

  1312. 

  1313.         // we really don't want to waste our time

  1314.         // doing useless computation, so fall-back on

  1315.         // the scalar C code for very small filter.

  1316.         // vectorizing is worth it only if you have

  1317.         // decent-sized vector.

  1318.         if (minFilterSize < 3)

  1319.             filterAlign = 1;

  1320.     }

  1321. 

  1322.     if (flags & SWS_CPU_CAPS_MMX) {

  1323.         // special case for unscaled vertical filtering

  1324.         if (minFilterSize == 1 && filterAlign == 2)

  1325.             filterAlign= 1;

  1326.     }

  1327. 

  1328.     assert(minFilterSize > 0);

  1329.     filterSize= (minFilterSize +(filterAlign-1)) & (~(filterAlign-1));

  1330.     assert(filterSize > 0);

  1331.     filter= av_malloc(filterSize*dstW*sizeof(*filter));

  1332.     if (filterSize >= MAX_FILTER_SIZE*16/((flags&SWS_ACCURATE_RND) ? APCK_SIZE : 16) || !filter)

  1333.         goto error;

  1334.     *outFilterSize= filterSize;

  1335. 

  1336.     if (flags&SWS_PRINT_INFO)

  1337.         av_log(NULL, AV_LOG_VERBOSE, "SwScaler: reducing / aligning filtersize %d -> %d\n", filter2Size, filterSize);

  1338.     /* try to reduce the filter-size (step2 reduce it) */

  1339.     for (i=0; i<dstW; i++)

  1340.     {

  1341.         int j;

  1342. 

  1343.         for (j=0; j<filterSize; j++)

  1344.         {

  1345.             if (j>=filter2Size) filter[i*filterSize + j]= 0.0;

  1346.             else               filter[i*filterSize + j]= filter2[i*filter2Size + j];

  1347.             if((flags & SWS_BITEXACT) && j>=minFilterSize)

  1348.                 filter[i*filterSize + j]= 0.0;

  1349.         }

  1350.     }

  1351. 

  1352. 

  1353.     //FIXME try to align filterpos if possible

  1354. 

  1355.     //fix borders

  1356.     for (i=0; i<dstW; i++)

  1357.     {

  1358.         int j;

  1359.         if ((*filterPos)[i] < 0)

  1360.         {

  1361.             // Move filter coeffs left to compensate for filterPos

  1362.             for (j=1; j<filterSize; j++)

  1363.             {

  1364.                 int left= FFMAX(j + (*filterPos)[i], 0);

  1365.                 filter[i*filterSize + left] += filter[i*filterSize + j];

  1366.                 filter[i*filterSize + j]=0;

  1367.             }

  1368.             (*filterPos)[i]= 0;

  1369.         }

  1370. 

  1371.         if ((*filterPos)[i] + filterSize > srcW)

  1372.         {

  1373.             int shift= (*filterPos)[i] + filterSize - srcW;

  1374.             // Move filter coeffs right to compensate for filterPos

  1375.             for (j=filterSize-2; j>=0; j--)

  1376.             {

  1377.                 int right= FFMIN(j + shift, filterSize-1);

  1378.                 filter[i*filterSize +right] += filter[i*filterSize +j];

  1379.                 filter[i*filterSize +j]=0;

  1380.             }

  1381.             (*filterPos)[i]= srcW - filterSize;

  1382.         }

  1383.     }

  1384. 

  1385.     // Note the +1 is for the MMXscaler which reads over the end

  1386.     /* align at 16 for AltiVec (needed by hScale_altivec_real) */

  1387.     *outFilter= av_mallocz(*outFilterSize*(dstW+1)*sizeof(int16_t));

  1388. 

  1389.     /* Normalize & Store in outFilter */

  1390.     for (i=0; i<dstW; i++)

  1391.     {

  1392.         int j;

  1393.         double error=0;

  1394.         double sum=0;

  1395.         double scale= one;

  1396. 

  1397.         for (j=0; j<filterSize; j++)

  1398.         {

  1399.             sum+= filter[i*filterSize + j];

  1400.         }

  1401.         scale/= sum;

  1402.         for (j=0; j<*outFilterSize; j++)

  1403.         {

  1404.             double v= filter[i*filterSize + j]*scale + error;

  1405.             int intV= floor(v + 0.5);

  1406.             (*outFilter)[i*(*outFilterSize) + j]= intV;

  1407.             error = v - intV;

  1408.         }

  1409.     }

  1410. 

  1411.     (*filterPos)[dstW]= (*filterPos)[dstW-1]; // the MMX scaler will read over the end

  1412.     for (i=0; i<*outFilterSize; i++)

  1413.     {

  1414.         int j= dstW*(*outFilterSize);

  1415.         (*outFilter)[j + i]= (*outFilter)[j + i - (*outFilterSize)];

  1416.     }

  1417. 

  1418.     ret=0;

  1419. error:

  1420.     av_free(filter);

  1421.     av_free(filter2);

  1422.     return ret;

  1423. }

  1424. 

  1425. #ifdef COMPILE_MMX2

  1426. static void initMMX2HScaler(int dstW, int xInc, uint8_t *funnyCode, int16_t *filter, int32_t *filterPos, int numSplits)

  1427. {

  1428.     uint8_t *fragmentA;

  1429.     long imm8OfPShufW1A;

  1430.     long imm8OfPShufW2A;

  1431.     long fragmentLengthA;

  1432.     uint8_t *fragmentB;

  1433.     long imm8OfPShufW1B;

  1434.     long imm8OfPShufW2B;

  1435.     long fragmentLengthB;

  1436.     int fragmentPos;

  1437. 

  1438.     int xpos, i;

  1439. 

  1440.     // create an optimized horizontal scaling routine

  1441. 

  1442.     //code fragment

  1443. 

  1444.     asm volatile(

  1445.         "jmp                         9f                 \n\t"

  1446.     // Begin

  1447.         "0:                                             \n\t"

  1448.         "movq    (%%"REG_d", %%"REG_a"), %%mm3          \n\t"

  1449.         "movd    (%%"REG_c", %%"REG_S"), %%mm0          \n\t"

  1450.         "movd   1(%%"REG_c", %%"REG_S"), %%mm1          \n\t"

  1451.         "punpcklbw                %%mm7, %%mm1          \n\t"

  1452.         "punpcklbw                %%mm7, %%mm0          \n\t"

  1453.         "pshufw                   $0xFF, %%mm1, %%mm1   \n\t"

  1454.         "1:                                             \n\t"

  1455.         "pshufw                   $0xFF, %%mm0, %%mm0   \n\t"

  1456.         "2:                                             \n\t"

  1457.         "psubw                    %%mm1, %%mm0          \n\t"

  1458.         "movl   8(%%"REG_b", %%"REG_a"), %%esi          \n\t"

  1459.         "pmullw                   %%mm3, %%mm0          \n\t"

  1460.         "psllw                       $7, %%mm1          \n\t"

  1461.         "paddw                    %%mm1, %%mm0          \n\t"

  1462. 

  1463.         "movq                     %%mm0, (%%"REG_D", %%"REG_a") \n\t"

  1464. 

  1465.         "add                         $8, %%"REG_a"      \n\t"

  1466.     // End

  1467.         "9:                                             \n\t"

  1468. //        "int $3                                         \n\t"

  1469.         "lea                 " LOCAL_MANGLE(0b) ", %0   \n\t"

  1470.         "lea                 " LOCAL_MANGLE(1b) ", %1   \n\t"

  1471.         "lea                 " LOCAL_MANGLE(2b) ", %2   \n\t"

  1472.         "dec                         %1                 \n\t"

  1473.         "dec                         %2                 \n\t"

  1474.         "sub                         %0, %1             \n\t"

  1475.         "sub                         %0, %2             \n\t"

  1476.         "lea                 " LOCAL_MANGLE(9b) ", %3   \n\t"

  1477.         "sub                         %0, %3             \n\t"

  1478. 

  1479. 

  1480.         :"=r" (fragmentA), "=r" (imm8OfPShufW1A), "=r" (imm8OfPShufW2A),

  1481.         "=r" (fragmentLengthA)

  1482.     );

  1483. 

  1484.     asm volatile(

  1485.         "jmp                         9f                 \n\t"

  1486.     // Begin

  1487.         "0:                                             \n\t"

  1488.         "movq    (%%"REG_d", %%"REG_a"), %%mm3          \n\t"

  1489.         "movd    (%%"REG_c", %%"REG_S"), %%mm0          \n\t"

  1490.         "punpcklbw                %%mm7, %%mm0          \n\t"

  1491.         "pshufw                   $0xFF, %%mm0, %%mm1   \n\t"

  1492.         "1:                                             \n\t"

  1493.         "pshufw                   $0xFF, %%mm0, %%mm0   \n\t"

  1494.         "2:                                             \n\t"

  1495.         "psubw                    %%mm1, %%mm0          \n\t"

  1496.         "movl   8(%%"REG_b", %%"REG_a"), %%esi          \n\t"

  1497.         "pmullw                   %%mm3, %%mm0          \n\t"

  1498.         "psllw                       $7, %%mm1          \n\t"

  1499.         "paddw                    %%mm1, %%mm0          \n\t"

  1500. 

  1501.         "movq                     %%mm0, (%%"REG_D", %%"REG_a") \n\t"

  1502. 

  1503.         "add                         $8, %%"REG_a"      \n\t"

  1504.     // End

  1505.         "9:                                             \n\t"

  1506. //        "int                       $3                   \n\t"

  1507.         "lea                 " LOCAL_MANGLE(0b) ", %0   \n\t"

  1508.         "lea                 " LOCAL_MANGLE(1b) ", %1   \n\t"

  1509.         "lea                 " LOCAL_MANGLE(2b) ", %2   \n\t"

  1510.         "dec                         %1                 \n\t"

  1511.         "dec                         %2                 \n\t"

  1512.         "sub                         %0, %1             \n\t"

  1513.         "sub                         %0, %2             \n\t"

  1514.         "lea                 " LOCAL_MANGLE(9b) ", %3   \n\t"

  1515.         "sub                         %0, %3             \n\t"

  1516. 

  1517. 

  1518.         :"=r" (fragmentB), "=r" (imm8OfPShufW1B), "=r" (imm8OfPShufW2B),

  1519.         "=r" (fragmentLengthB)

  1520.     );

  1521. 

  1522.     xpos= 0; //lumXInc/2 - 0x8000; // difference between pixel centers

  1523.     fragmentPos=0;

  1524. 

  1525.     for (i=0; i<dstW/numSplits; i++)

  1526.     {

  1527.         int xx=xpos>>16;

  1528. 

  1529.         if ((i&3) == 0)

  1530.         {

  1531.             int a=0;

  1532.             int b=((xpos+xInc)>>16) - xx;

  1533.             int c=((xpos+xInc*2)>>16) - xx;

  1534.             int d=((xpos+xInc*3)>>16) - xx;

  1535. 

  1536.             filter[i  ] = (( xpos         & 0xFFFF) ^ 0xFFFF)>>9;

  1537.             filter[i+1] = (((xpos+xInc  ) & 0xFFFF) ^ 0xFFFF)>>9;

  1538.             filter[i+2] = (((xpos+xInc*2) & 0xFFFF) ^ 0xFFFF)>>9;

  1539.             filter[i+3] = (((xpos+xInc*3) & 0xFFFF) ^ 0xFFFF)>>9;

  1540.             filterPos[i/2]= xx;

  1541. 

  1542.             if (d+1<4)

  1543.             {

  1544.                 int maxShift= 3-(d+1);

  1545.                 int shift=0;

  1546. 

  1547.                 memcpy(funnyCode + fragmentPos, fragmentB, fragmentLengthB);

  1548. 

  1549.                 funnyCode[fragmentPos + imm8OfPShufW1B]=

  1550.                     (a+1) | ((b+1)<<2) | ((c+1)<<4) | ((d+1)<<6);

  1551.                 funnyCode[fragmentPos + imm8OfPShufW2B]=

  1552.                     a | (b<<2) | (c<<4) | (d<<6);

  1553. 

  1554.                 if (i+3>=dstW) shift=maxShift; //avoid overread

  1555.                 else if ((filterPos[i/2]&3) <= maxShift) shift=filterPos[i/2]&3; //Align

  1556. 

  1557.                 if (shift && i>=shift)

  1558.                 {

  1559.                     funnyCode[fragmentPos + imm8OfPShufW1B]+= 0x55*shift;

  1560.                     funnyCode[fragmentPos + imm8OfPShufW2B]+= 0x55*shift;

  1561.                     filterPos[i/2]-=shift;

  1562.                 }

  1563. 

  1564.                 fragmentPos+= fragmentLengthB;

  1565.             }

  1566.             else

  1567.             {

  1568.                 int maxShift= 3-d;

  1569.                 int shift=0;

  1570. 

  1571.                 memcpy(funnyCode + fragmentPos, fragmentA, fragmentLengthA);

  1572. 

  1573.                 funnyCode[fragmentPos + imm8OfPShufW1A]=

  1574.                 funnyCode[fragmentPos + imm8OfPShufW2A]=

  1575.                     a | (b<<2) | (c<<4) | (d<<6);

  1576. 

  1577.                 if (i+4>=dstW) shift=maxShift; //avoid overread

  1578.                 else if ((filterPos[i/2]&3) <= maxShift) shift=filterPos[i/2]&3; //partial align

  1579. 

  1580.                 if (shift && i>=shift)

  1581.                 {

  1582.                     funnyCode[fragmentPos + imm8OfPShufW1A]+= 0x55*shift;

  1583.                     funnyCode[fragmentPos + imm8OfPShufW2A]+= 0x55*shift;

  1584.                     filterPos[i/2]-=shift;

  1585.                 }

  1586. 

  1587.                 fragmentPos+= fragmentLengthA;

  1588.             }

  1589. 

  1590.             funnyCode[fragmentPos]= RET;

  1591.         }

  1592.         xpos+=xInc;

  1593.     }

  1594.     filterPos[i/2]= xpos>>16; // needed to jump to the next part

  1595. }

  1596. #endif /* COMPILE_MMX2 */

  1597. 

  1598. static void globalInit(void){

  1599.     // generating tables:

  1600.     int i;

  1601.     for (i=0; i<768; i++){

  1602.         int c= av_clip_uint8(i-256);

  1603.         clip_table[i]=c;

  1604.     }

  1605. }

  1606. 

  1607. static SwsFunc getSwsFunc(int flags){

  1608. 

  1609. #if defined(RUNTIME_CPUDETECT) && defined (CONFIG_GPL)

  1610. #if defined(ARCH_X86)

  1611.     // ordered per speed fastest first

  1612.     if (flags & SWS_CPU_CAPS_MMX2)

  1613.         return swScale_MMX2;

  1614.     else if (flags & SWS_CPU_CAPS_3DNOW)

  1615.         return swScale_3DNow;

  1616.     else if (flags & SWS_CPU_CAPS_MMX)

  1617.         return swScale_MMX;

  1618.     else

  1619.         return swScale_C;

  1620. 

  1621. #else

  1622. #ifdef ARCH_POWERPC

  1623.     if (flags & SWS_CPU_CAPS_ALTIVEC)

  1624.         return swScale_altivec;

  1625.     else

  1626.         return swScale_C;

  1627. #endif

  1628.     return swScale_C;

  1629. #endif /* defined(ARCH_X86) */

  1630. #else //RUNTIME_CPUDETECT

  1631. #ifdef HAVE_MMX2

  1632.     return swScale_MMX2;

  1633. #elif defined (HAVE_3DNOW)

  1634.     return swScale_3DNow;

  1635. #elif defined (HAVE_MMX)

  1636.     return swScale_MMX;

  1637. #elif defined (HAVE_ALTIVEC)

  1638.     return swScale_altivec;

  1639. #else

  1640.     return swScale_C;

  1641. #endif

  1642. #endif //!RUNTIME_CPUDETECT

  1643. }

  1644. 

  1645. static int PlanarToNV12Wrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1646.                                int srcSliceH, uint8_t* dstParam[], int dstStride[]){

  1647.     uint8_t *dst=dstParam[0] + dstStride[0]*srcSliceY;

  1648.     /* Copy Y plane */

  1649.     if (dstStride[0]==srcStride[0] && srcStride[0] > 0)

  1650.         memcpy(dst, src[0], srcSliceH*dstStride[0]);

  1651.     else

  1652.     {

  1653.         int i;

  1654.         uint8_t *srcPtr= src[0];

  1655.         uint8_t *dstPtr= dst;

  1656.         for (i=0; i<srcSliceH; i++)

  1657.         {

  1658.             memcpy(dstPtr, srcPtr, c->srcW);

  1659.             srcPtr+= srcStride[0];

  1660.             dstPtr+= dstStride[0];

  1661.         }

  1662.     }

  1663.     dst = dstParam[1] + dstStride[1]*srcSliceY/2;

  1664.     if (c->dstFormat == PIX_FMT_NV12)

  1665.         interleaveBytes(src[1], src[2], dst, c->srcW/2, srcSliceH/2, srcStride[1], srcStride[2], dstStride[0]);

  1666.     else

  1667.         interleaveBytes(src[2], src[1], dst, c->srcW/2, srcSliceH/2, srcStride[2], srcStride[1], dstStride[0]);

  1668. 

  1669.     return srcSliceH;

  1670. }

  1671. 

  1672. static int PlanarToYuy2Wrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1673.                                int srcSliceH, uint8_t* dstParam[], int dstStride[]){

  1674.     uint8_t *dst=dstParam[0] + dstStride[0]*srcSliceY;

  1675. 

  1676.     yv12toyuy2(src[0], src[1], src[2], dst, c->srcW, srcSliceH, srcStride[0], srcStride[1], dstStride[0]);

  1677. 

  1678.     return srcSliceH;

  1679. }

  1680. 

  1681. static int PlanarToUyvyWrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1682.                                int srcSliceH, uint8_t* dstParam[], int dstStride[]){

  1683.     uint8_t *dst=dstParam[0] + dstStride[0]*srcSliceY;

  1684. 

  1685.     yv12touyvy(src[0], src[1], src[2], dst, c->srcW, srcSliceH, srcStride[0], srcStride[1], dstStride[0]);

  1686. 

  1687.     return srcSliceH;

  1688. }

  1689. 

  1690. static int YUV422PToYuy2Wrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1691.                                 int srcSliceH, uint8_t* dstParam[], int dstStride[]){

  1692.     uint8_t *dst=dstParam[0] + dstStride[0]*srcSliceY;

  1693. 

  1694.     yuv422ptoyuy2(src[0],src[1],src[2],dst,c->srcW,srcSliceH,srcStride[0],srcStride[1],dstStride[0]);

  1695. 

  1696.     return srcSliceH;

  1697. }

  1698. 

  1699. static int YUV422PToUyvyWrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1700.                                 int srcSliceH, uint8_t* dstParam[], int dstStride[]){

  1701.     uint8_t *dst=dstParam[0] + dstStride[0]*srcSliceY;

  1702. 

  1703.     yuv422ptouyvy(src[0],src[1],src[2],dst,c->srcW,srcSliceH,srcStride[0],srcStride[1],dstStride[0]);

  1704. 

  1705.     return srcSliceH;

  1706. }

  1707. 

  1708. /* {RGB,BGR}{15,16,24,32,32_1} -> {RGB,BGR}{15,16,24,32} */

  1709. static int rgb2rgbWrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1710.                           int srcSliceH, uint8_t* dst[], int dstStride[]){

  1711.     const int srcFormat= c->srcFormat;

  1712.     const int dstFormat= c->dstFormat;

  1713.     const int srcBpp= (fmt_depth(srcFormat) + 7) >> 3;

  1714.     const int dstBpp= (fmt_depth(dstFormat) + 7) >> 3;

  1715.     const int srcId= fmt_depth(srcFormat) >> 2; /* 1:0, 4:1, 8:2, 15:3, 16:4, 24:6, 32:8 */

  1716.     const int dstId= fmt_depth(dstFormat) >> 2;

  1717.     void (*conv)(const uint8_t *src, uint8_t *dst, long src_size)=NULL;

  1718. 

  1719.     /* BGR -> BGR */

  1720.     if (  (isBGR(srcFormat) && isBGR(dstFormat))

  1721.        || (isRGB(srcFormat) && isRGB(dstFormat))){

  1722.         switch(srcId | (dstId<<4)){

  1723.         case 0x34: conv= rgb16to15; break;

  1724.         case 0x36: conv= rgb24to15; break;

  1725.         case 0x38: conv= rgb32to15; break;

  1726.         case 0x43: conv= rgb15to16; break;

  1727.         case 0x46: conv= rgb24to16; break;

  1728.         case 0x48: conv= rgb32to16; break;

  1729.         case 0x63: conv= rgb15to24; break;

  1730.         case 0x64: conv= rgb16to24; break;

  1731.         case 0x68: conv= rgb32to24; break;

  1732.         case 0x83: conv= rgb15to32; break;

  1733.         case 0x84: conv= rgb16to32; break;

  1734.         case 0x86: conv= rgb24to32; break;

  1735.         default: av_log(c, AV_LOG_ERROR, "internal error %s -> %s converter\n",

  1736.                         sws_format_name(srcFormat), sws_format_name(dstFormat)); break;

  1737.         }

  1738.     }else if (  (isBGR(srcFormat) && isRGB(dstFormat))

  1739.              || (isRGB(srcFormat) && isBGR(dstFormat))){

  1740.         switch(srcId | (dstId<<4)){

  1741.         case 0x33: conv= rgb15tobgr15; break;

  1742.         case 0x34: conv= rgb16tobgr15; break;

  1743.         case 0x36: conv= rgb24tobgr15; break;

  1744.         case 0x38: conv= rgb32tobgr15; break;

  1745.         case 0x43: conv= rgb15tobgr16; break;

  1746.         case 0x44: conv= rgb16tobgr16; break;

  1747.         case 0x46: conv= rgb24tobgr16; break;

  1748.         case 0x48: conv= rgb32tobgr16; break;

  1749.         case 0x63: conv= rgb15tobgr24; break;

  1750.         case 0x64: conv= rgb16tobgr24; break;

  1751.         case 0x66: conv= rgb24tobgr24; break;

  1752.         case 0x68: conv= rgb32tobgr24; break;

  1753.         case 0x83: conv= rgb15tobgr32; break;

  1754.         case 0x84: conv= rgb16tobgr32; break;

  1755.         case 0x86: conv= rgb24tobgr32; break;

  1756.         case 0x88: conv= rgb32tobgr32; break;

  1757.         default: av_log(c, AV_LOG_ERROR, "internal error %s -> %s converter\n",

  1758.                         sws_format_name(srcFormat), sws_format_name(dstFormat)); break;

  1759.         }

  1760.     }else{

  1761.         av_log(c, AV_LOG_ERROR, "internal error %s -> %s converter\n",

  1762.                sws_format_name(srcFormat), sws_format_name(dstFormat));

  1763.     }

  1764. 

  1765.     if(conv)

  1766.     {

  1767.         uint8_t *srcPtr= src[0];

  1768.         if(srcFormat == PIX_FMT_RGB32_1 || srcFormat == PIX_FMT_BGR32_1)

  1769.             srcPtr += ALT32_CORR;

  1770. 

  1771.         if (dstStride[0]*srcBpp == srcStride[0]*dstBpp && srcStride[0] > 0)

  1772.             conv(srcPtr, dst[0] + dstStride[0]*srcSliceY, srcSliceH*srcStride[0]);

  1773.         else

  1774.         {

  1775.             int i;

  1776.             uint8_t *dstPtr= dst[0] + dstStride[0]*srcSliceY;

  1777. 

  1778.             for (i=0; i<srcSliceH; i++)

  1779.             {

  1780.                 conv(srcPtr, dstPtr, c->srcW*srcBpp);

  1781.                 srcPtr+= srcStride[0];

  1782.                 dstPtr+= dstStride[0];

  1783.             }

  1784.         }

  1785.     }

  1786.     return srcSliceH;

  1787. }

  1788. 

  1789. static int bgr24toyv12Wrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1790.                               int srcSliceH, uint8_t* dst[], int dstStride[]){

  1791. 

  1792.     rgb24toyv12(

  1793.         src[0],

  1794.         dst[0]+ srcSliceY    *dstStride[0],

  1795.         dst[1]+(srcSliceY>>1)*dstStride[1],

  1796.         dst[2]+(srcSliceY>>1)*dstStride[2],

  1797.         c->srcW, srcSliceH,

  1798.         dstStride[0], dstStride[1], srcStride[0]);

  1799.     return srcSliceH;

  1800. }

  1801. 

  1802. static int yvu9toyv12Wrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1803.                              int srcSliceH, uint8_t* dst[], int dstStride[]){

  1804.     int i;

  1805. 

  1806.     /* copy Y */

  1807.     if (srcStride[0]==dstStride[0] && srcStride[0] > 0)

  1808.         memcpy(dst[0]+ srcSliceY*dstStride[0], src[0], srcStride[0]*srcSliceH);

  1809.     else{

  1810.         uint8_t *srcPtr= src[0];

  1811.         uint8_t *dstPtr= dst[0] + dstStride[0]*srcSliceY;

  1812. 

  1813.         for (i=0; i<srcSliceH; i++)

  1814.         {

  1815.             memcpy(dstPtr, srcPtr, c->srcW);

  1816.             srcPtr+= srcStride[0];

  1817.             dstPtr+= dstStride[0];

  1818.         }

  1819.     }

  1820. 

  1821.     if (c->dstFormat==PIX_FMT_YUV420P){

  1822.         planar2x(src[1], dst[1], c->chrSrcW, c->chrSrcH, srcStride[1], dstStride[1]);

  1823.         planar2x(src[2], dst[2], c->chrSrcW, c->chrSrcH, srcStride[2], dstStride[2]);

  1824.     }else{

  1825.         planar2x(src[1], dst[2], c->chrSrcW, c->chrSrcH, srcStride[1], dstStride[2]);

  1826.         planar2x(src[2], dst[1], c->chrSrcW, c->chrSrcH, srcStride[2], dstStride[1]);

  1827.     }

  1828.     return srcSliceH;

  1829. }

  1830. 

  1831. /* unscaled copy like stuff (assumes nearly identical formats) */

  1832. static int packedCopy(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1833.                       int srcSliceH, uint8_t* dst[], int dstStride[])

  1834. {

  1835.     if (dstStride[0]==srcStride[0] && srcStride[0] > 0)

  1836.         memcpy(dst[0] + dstStride[0]*srcSliceY, src[0], srcSliceH*dstStride[0]);

  1837.     else

  1838.     {

  1839.         int i;

  1840.         uint8_t *srcPtr= src[0];

  1841.         uint8_t *dstPtr= dst[0] + dstStride[0]*srcSliceY;

  1842.         int length=0;

  1843. 

  1844.         /* universal length finder */

  1845.         while(length+c->srcW <= FFABS(dstStride[0])

  1846.            && length+c->srcW <= FFABS(srcStride[0])) length+= c->srcW;

  1847.         assert(length!=0);

  1848. 

  1849.         for (i=0; i<srcSliceH; i++)

  1850.         {

  1851.             memcpy(dstPtr, srcPtr, length);

  1852.             srcPtr+= srcStride[0];

  1853.             dstPtr+= dstStride[0];

  1854.         }

  1855.     }

  1856.     return srcSliceH;

  1857. }

  1858. 

  1859. static int planarCopy(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1860.                       int srcSliceH, uint8_t* dst[], int dstStride[])

  1861. {

  1862.     int plane;

  1863.     for (plane=0; plane<3; plane++)

  1864.     {

  1865.         int length= plane==0 ? c->srcW  : -((-c->srcW  )>>c->chrDstHSubSample);

  1866.         int y=      plane==0 ? srcSliceY: -((-srcSliceY)>>c->chrDstVSubSample);

  1867.         int height= plane==0 ? srcSliceH: -((-srcSliceH)>>c->chrDstVSubSample);

  1868. 

  1869.         if ((isGray(c->srcFormat) || isGray(c->dstFormat)) && plane>0)

  1870.         {

  1871.             if (!isGray(c->dstFormat))

  1872.                 memset(dst[plane], 128, dstStride[plane]*height);

  1873.         }

  1874.         else

  1875.         {

  1876.             if (dstStride[plane]==srcStride[plane] && srcStride[plane] > 0)

  1877.                 memcpy(dst[plane] + dstStride[plane]*y, src[plane], height*dstStride[plane]);

  1878.             else

  1879.             {

  1880.                 int i;

  1881.                 uint8_t *srcPtr= src[plane];

  1882.                 uint8_t *dstPtr= dst[plane] + dstStride[plane]*y;

  1883.                 for (i=0; i<height; i++)

  1884.                 {

  1885.                     memcpy(dstPtr, srcPtr, length);

  1886.                     srcPtr+= srcStride[plane];

  1887.                     dstPtr+= dstStride[plane];

  1888.                 }

  1889.             }

  1890.         }

  1891.     }

  1892.     return srcSliceH;

  1893. }

  1894. 

  1895. static int gray16togray(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1896.                         int srcSliceH, uint8_t* dst[], int dstStride[]){

  1897. 

  1898.     int length= c->srcW;

  1899.     int y=      srcSliceY;

  1900.     int height= srcSliceH;

  1901.     int i, j;

  1902.     uint8_t *srcPtr= src[0];

  1903.     uint8_t *dstPtr= dst[0] + dstStride[0]*y;

  1904. 

  1905.     if (!isGray(c->dstFormat)){

  1906.         int height= -((-srcSliceH)>>c->chrDstVSubSample);

  1907.         memset(dst[1], 128, dstStride[1]*height);

  1908.         memset(dst[2], 128, dstStride[2]*height);

  1909.     }

  1910.     if (c->srcFormat == PIX_FMT_GRAY16LE) srcPtr++;

  1911.     for (i=0; i<height; i++)

  1912.     {

  1913.         for (j=0; j<length; j++) dstPtr[j] = srcPtr[j<<1];

  1914.         srcPtr+= srcStride[0];

  1915.         dstPtr+= dstStride[0];

  1916.     }

  1917.     return srcSliceH;

  1918. }

  1919. 

  1920. static int graytogray16(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1921.                         int srcSliceH, uint8_t* dst[], int dstStride[]){

  1922. 

  1923.     int length= c->srcW;

  1924.     int y=      srcSliceY;

  1925.     int height= srcSliceH;

  1926.     int i, j;

  1927.     uint8_t *srcPtr= src[0];

  1928.     uint8_t *dstPtr= dst[0] + dstStride[0]*y;

  1929.     for (i=0; i<height; i++)

  1930.     {

  1931.         for (j=0; j<length; j++)

  1932.         {

  1933.             dstPtr[j<<1] = srcPtr[j];

  1934.             dstPtr[(j<<1)+1] = srcPtr[j];

  1935.         }

  1936.         srcPtr+= srcStride[0];

  1937.         dstPtr+= dstStride[0];

  1938.     }

  1939.     return srcSliceH;

  1940. }

  1941. 

  1942. static int gray16swap(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1943.                       int srcSliceH, uint8_t* dst[], int dstStride[]){

  1944. 

  1945.     int length= c->srcW;

  1946.     int y=      srcSliceY;

  1947.     int height= srcSliceH;

  1948.     int i, j;

  1949.     uint16_t *srcPtr= (uint16_t*)src[0];

  1950.     uint16_t *dstPtr= (uint16_t*)(dst[0] + dstStride[0]*y/2);

  1951.     for (i=0; i<height; i++)

  1952.     {

  1953.         for (j=0; j<length; j++) dstPtr[j] = bswap_16(srcPtr[j]);

  1954.         srcPtr+= srcStride[0]/2;

  1955.         dstPtr+= dstStride[0]/2;

  1956.     }

  1957.     return srcSliceH;

  1958. }

  1959. 

  1960. 

  1961. static void getSubSampleFactors(int *h, int *v, int format){

  1962.     switch(format){

  1963.     case PIX_FMT_UYVY422:

  1964.     case PIX_FMT_YUYV422:

  1965.         *h=1;

  1966.         *v=0;

  1967.         break;

  1968.     case PIX_FMT_YUV420P:

  1969.     case PIX_FMT_YUVA420P:

  1970.     case PIX_FMT_GRAY16BE:

  1971.     case PIX_FMT_GRAY16LE:

  1972.     case PIX_FMT_GRAY8: //FIXME remove after different subsamplings are fully implemented

  1973.     case PIX_FMT_NV12:

  1974.     case PIX_FMT_NV21:

  1975.         *h=1;

  1976.         *v=1;

  1977.         break;

  1978.     case PIX_FMT_YUV440P:

  1979.         *h=0;

  1980.         *v=1;

  1981.         break;

  1982.     case PIX_FMT_YUV410P:

  1983.         *h=2;

  1984.         *v=2;

  1985.         break;

  1986.     case PIX_FMT_YUV444P:

  1987.         *h=0;

  1988.         *v=0;

  1989.         break;

  1990.     case PIX_FMT_YUV422P:

  1991.         *h=1;

  1992.         *v=0;

  1993.         break;

  1994.     case PIX_FMT_YUV411P:

  1995.         *h=2;

  1996.         *v=0;

  1997.         break;

  1998.     default:

  1999.         *h=0;

  2000.         *v=0;

  2001.         break;

  2002.     }

  2003. }

  2004. 

  2005. static uint16_t roundToInt16(int64_t f){

  2006.     int r= (f + (1<<15))>>16;

  2007.          if (r<-0x7FFF) return 0x8000;

  2008.     else if (r> 0x7FFF) return 0x7FFF;

  2009.     else                return r;

  2010. }

  2011. 

  2012. /**

  2013.  * @param inv_table the yuv2rgb coeffs, normally Inverse_Table_6_9[x]

  2014.  * @param fullRange if 1 then the luma range is 0..255 if 0 it is 16..235

  2015.  * @return -1 if not supported

  2016.  */

  2017. int sws_setColorspaceDetails(SwsContext *c, const int inv_table[4], int srcRange, const int table[4], int dstRange, int brightness, int contrast, int saturation){

  2018.     int64_t crv =  inv_table[0];

  2019.     int64_t cbu =  inv_table[1];

  2020.     int64_t cgu = -inv_table[2];

  2021.     int64_t cgv = -inv_table[3];

  2022.     int64_t cy  = 1<<16;

  2023.     int64_t oy  = 0;

  2024. 

  2025.     memcpy(c->srcColorspaceTable, inv_table, sizeof(int)*4);

  2026.     memcpy(c->dstColorspaceTable,     table, sizeof(int)*4);

  2027. 

  2028.     c->brightness= brightness;

  2029.     c->contrast  = contrast;

  2030.     c->saturation= saturation;

  2031.     c->srcRange  = srcRange;

  2032.     c->dstRange  = dstRange;

  2033.     if (isYUV(c->dstFormat) || isGray(c->dstFormat)) return 0;

  2034. 

  2035.     c->uOffset=   0x0400040004000400LL;

  2036.     c->vOffset=   0x0400040004000400LL;

  2037. 

  2038.     if (!srcRange){

  2039.         cy= (cy*255) / 219;

  2040.         oy= 16<<16;

  2041.     }else{

  2042.         crv= (crv*224) / 255;

  2043.         cbu= (cbu*224) / 255;

  2044.         cgu= (cgu*224) / 255;

  2045.         cgv= (cgv*224) / 255;

  2046.     }

  2047. 

  2048.     cy = (cy *contrast             )>>16;

  2049.     crv= (crv*contrast * saturation)>>32;

  2050.     cbu= (cbu*contrast * saturation)>>32;

  2051.     cgu= (cgu*contrast * saturation)>>32;

  2052.     cgv= (cgv*contrast * saturation)>>32;

  2053. 

  2054.     oy -= 256*brightness;

  2055. 

  2056.     c->yCoeff=    roundToInt16(cy *8192) * 0x0001000100010001ULL;

  2057.     c->vrCoeff=   roundToInt16(crv*8192) * 0x0001000100010001ULL;

  2058.     c->ubCoeff=   roundToInt16(cbu*8192) * 0x0001000100010001ULL;

  2059.     c->vgCoeff=   roundToInt16(cgv*8192) * 0x0001000100010001ULL;

  2060.     c->ugCoeff=   roundToInt16(cgu*8192) * 0x0001000100010001ULL;

  2061.     c->yOffset=   roundToInt16(oy *   8) * 0x0001000100010001ULL;

  2062. 

  2063.     c->yuv2rgb_y_coeff  = (int16_t)roundToInt16(cy <<13);

  2064.     c->yuv2rgb_y_offset = (int16_t)roundToInt16(oy << 9);

  2065.     c->yuv2rgb_v2r_coeff= (int16_t)roundToInt16(crv<<13);

  2066.     c->yuv2rgb_v2g_coeff= (int16_t)roundToInt16(cgv<<13);

  2067.     c->yuv2rgb_u2g_coeff= (int16_t)roundToInt16(cgu<<13);

  2068.     c->yuv2rgb_u2b_coeff= (int16_t)roundToInt16(cbu<<13);

  2069. 

  2070.     yuv2rgb_c_init_tables(c, inv_table, srcRange, brightness, contrast, saturation);

  2071.     //FIXME factorize

  2072. 

  2073. #ifdef COMPILE_ALTIVEC

  2074.     if (c->flags & SWS_CPU_CAPS_ALTIVEC)

  2075.         yuv2rgb_altivec_init_tables (c, inv_table, brightness, contrast, saturation);

  2076. #endif

  2077.     return 0;

  2078. }

  2079. 

  2080. /**

  2081.  * @return -1 if not supported

  2082.  */

  2083. int sws_getColorspaceDetails(SwsContext *c, int **inv_table, int *srcRange, int **table, int *dstRange, int *brightness, int *contrast, int *saturation){

  2084.     if (isYUV(c->dstFormat) || isGray(c->dstFormat)) return -1;

  2085. 

  2086.     *inv_table = c->srcColorspaceTable;

  2087.     *table     = c->dstColorspaceTable;

  2088.     *srcRange  = c->srcRange;

  2089.     *dstRange  = c->dstRange;

  2090.     *brightness= c->brightness;

  2091.     *contrast  = c->contrast;

  2092.     *saturation= c->saturation;

  2093. 

  2094.     return 0;

  2095. }

  2096. 

  2097. static int handle_jpeg(int *format)

  2098. {

  2099.     switch (*format) {

  2100.         case PIX_FMT_YUVJ420P:

  2101.             *format = PIX_FMT_YUV420P;

  2102.             return 1;

  2103.         case PIX_FMT_YUVJ422P:

  2104.             *format = PIX_FMT_YUV422P;

  2105.             return 1;

  2106.         case PIX_FMT_YUVJ444P:

  2107.             *format = PIX_FMT_YUV444P;

  2108.             return 1;

  2109.         case PIX_FMT_YUVJ440P:

  2110.             *format = PIX_FMT_YUV440P;

  2111.             return 1;

  2112.         default:

  2113.             return 0;

  2114.     }

  2115. }

  2116. 

  2117. SwsContext *sws_getContext(int srcW, int srcH, int srcFormat, int dstW, int dstH, int dstFormat, int flags,

  2118.                            SwsFilter *srcFilter, SwsFilter *dstFilter, double *param){

  2119. 

  2120.     SwsContext *c;

  2121.     int i;

  2122.     int usesVFilter, usesHFilter;

  2123.     int unscaled, needsDither;

  2124.     int srcRange, dstRange;

  2125.     SwsFilter dummyFilter= {NULL, NULL, NULL, NULL};

  2126. #if defined(ARCH_X86)

  2127.     if (flags & SWS_CPU_CAPS_MMX)

  2128.         asm volatile("emms\n\t"::: "memory");

  2129. #endif

  2130. 

  2131. #if !defined(RUNTIME_CPUDETECT) || !defined (CONFIG_GPL) //ensure that the flags match the compiled variant if cpudetect is off

  2132.     flags &= ~(SWS_CPU_CAPS_MMX|SWS_CPU_CAPS_MMX2|SWS_CPU_CAPS_3DNOW|SWS_CPU_CAPS_ALTIVEC|SWS_CPU_CAPS_BFIN);

  2133. #ifdef HAVE_MMX2

  2134.     flags |= SWS_CPU_CAPS_MMX|SWS_CPU_CAPS_MMX2;

  2135. #elif defined (HAVE_3DNOW)

  2136.     flags |= SWS_CPU_CAPS_MMX|SWS_CPU_CAPS_3DNOW;

  2137. #elif defined (HAVE_MMX)

  2138.     flags |= SWS_CPU_CAPS_MMX;

  2139. #elif defined (HAVE_ALTIVEC)

  2140.     flags |= SWS_CPU_CAPS_ALTIVEC;

  2141. #elif defined (ARCH_BFIN)

  2142.     flags |= SWS_CPU_CAPS_BFIN;

  2143. #endif

  2144. #endif /* RUNTIME_CPUDETECT */

  2145.     if (clip_table[512] != 255) globalInit();

  2146.     if (!rgb15to16) sws_rgb2rgb_init(flags);

  2147. 

  2148.     unscaled = (srcW == dstW && srcH == dstH);

  2149.     needsDither= (isBGR(dstFormat) || isRGB(dstFormat))

  2150.         && (fmt_depth(dstFormat))<24

  2151.         && ((fmt_depth(dstFormat))<(fmt_depth(srcFormat)) || (!(isRGB(srcFormat) || isBGR(srcFormat))));

  2152. 

  2153.     srcRange = handle_jpeg(&srcFormat);

  2154.     dstRange = handle_jpeg(&dstFormat);

  2155. 

  2156.     if (!isSupportedIn(srcFormat))

  2157.     {

  2158.         av_log(NULL, AV_LOG_ERROR, "swScaler: %s is not supported as input pixel format\n", sws_format_name(srcFormat));

  2159.         return NULL;

  2160.     }

  2161.     if (!isSupportedOut(dstFormat))

  2162.     {

  2163.         av_log(NULL, AV_LOG_ERROR, "swScaler: %s is not supported as output pixel format\n", sws_format_name(dstFormat));

  2164.         return NULL;

  2165.     }

  2166. 

  2167.     i= flags & ( SWS_POINT

  2168.                 |SWS_AREA

  2169.                 |SWS_BILINEAR

  2170.                 |SWS_FAST_BILINEAR

  2171.                 |SWS_BICUBIC

  2172.                 |SWS_X

  2173.                 |SWS_GAUSS

  2174.                 |SWS_LANCZOS

  2175.                 |SWS_SINC

  2176.                 |SWS_SPLINE

  2177.                 |SWS_BICUBLIN);

  2178.     if(!i || (i & (i-1)))

  2179.     {

  2180.         av_log(NULL, AV_LOG_ERROR, "swScaler: Exactly one scaler algorithm must be choosen\n");

  2181.         return NULL;

  2182.     }

  2183. 

  2184.     /* sanity check */

  2185.     if (srcW<4 || srcH<1 || dstW<8 || dstH<1) //FIXME check if these are enough and try to lowwer them after fixing the relevant parts of the code

  2186.     {

  2187.         av_log(NULL, AV_LOG_ERROR, "swScaler: %dx%d -> %dx%d is invalid scaling dimension\n",

  2188.                srcW, srcH, dstW, dstH);

  2189.         return NULL;

  2190.     }

  2191.     if(srcW > VOFW || dstW > VOFW){

  2192.         av_log(NULL, AV_LOG_ERROR, "swScaler: Compile time max width is "AV_STRINGIFY(VOFW)" change VOF/VOFW and recompile\n");

  2193.         return NULL;

  2194.     }

  2195. 

  2196.     if (!dstFilter) dstFilter= &dummyFilter;

  2197.     if (!srcFilter) srcFilter= &dummyFilter;

  2198. 

  2199.     c= av_mallocz(sizeof(SwsContext));

  2200. 

  2201.     c->av_class = &sws_context_class;

  2202.     c->srcW= srcW;

  2203.     c->srcH= srcH;

  2204.     c->dstW= dstW;

  2205.     c->dstH= dstH;

  2206.     c->lumXInc= ((srcW<<16) + (dstW>>1))/dstW;

  2207.     c->lumYInc= ((srcH<<16) + (dstH>>1))/dstH;

  2208.     c->flags= flags;

  2209.     c->dstFormat= dstFormat;

  2210.     c->srcFormat= srcFormat;

  2211.     c->vRounder= 4* 0x0001000100010001ULL;

  2212. 

  2213.     usesHFilter= usesVFilter= 0;

  2214.     if (dstFilter->lumV && dstFilter->lumV->length>1) usesVFilter=1;

  2215.     if (dstFilter->lumH && dstFilter->lumH->length>1) usesHFilter=1;

  2216.     if (dstFilter->chrV && dstFilter->chrV->length>1) usesVFilter=1;

  2217.     if (dstFilter->chrH && dstFilter->chrH->length>1) usesHFilter=1;

  2218.     if (srcFilter->lumV && srcFilter->lumV->length>1) usesVFilter=1;

  2219.     if (srcFilter->lumH && srcFilter->lumH->length>1) usesHFilter=1;

  2220.     if (srcFilter->chrV && srcFilter->chrV->length>1) usesVFilter=1;

  2221.     if (srcFilter->chrH && srcFilter->chrH->length>1) usesHFilter=1;

  2222. 

  2223.     getSubSampleFactors(&c->chrSrcHSubSample, &c->chrSrcVSubSample, srcFormat);

  2224.     getSubSampleFactors(&c->chrDstHSubSample, &c->chrDstVSubSample, dstFormat);

  2225. 

  2226.     // reuse chroma for 2 pixles rgb/bgr unless user wants full chroma interpolation

  2227.     if ((isBGR(dstFormat) || isRGB(dstFormat)) && !(flags&SWS_FULL_CHR_H_INT)) c->chrDstHSubSample=1;

  2228. 

  2229.     // drop some chroma lines if the user wants it

  2230.     c->vChrDrop= (flags&SWS_SRC_V_CHR_DROP_MASK)>>SWS_SRC_V_CHR_DROP_SHIFT;

  2231.     c->chrSrcVSubSample+= c->vChrDrop;

  2232. 

  2233.     // drop every 2. pixel for chroma calculation unless user wants full chroma

  2234.     if ((isBGR(srcFormat) || isRGB(srcFormat)) && !(flags&SWS_FULL_CHR_H_INP)

  2235.       && srcFormat!=PIX_FMT_RGB8      && srcFormat!=PIX_FMT_BGR8

  2236.       && srcFormat!=PIX_FMT_RGB4      && srcFormat!=PIX_FMT_BGR4

  2237.       && srcFormat!=PIX_FMT_RGB4_BYTE && srcFormat!=PIX_FMT_BGR4_BYTE

  2238.       && ((dstW>>c->chrDstHSubSample) <= (srcW>>1) || (flags&(SWS_FAST_BILINEAR|SWS_POINT))))

  2239.         c->chrSrcHSubSample=1;

  2240. 

  2241.     if (param){

  2242.         c->param[0] = param[0];

  2243.         c->param[1] = param[1];

  2244.     }else{

  2245.         c->param[0] =

  2246.         c->param[1] = SWS_PARAM_DEFAULT;

  2247.     }

  2248. 

  2249.     c->chrIntHSubSample= c->chrDstHSubSample;

  2250.     c->chrIntVSubSample= c->chrSrcVSubSample;

  2251. 

  2252.     // Note the -((-x)>>y) is so that we always round toward +inf.

  2253.     c->chrSrcW= -((-srcW) >> c->chrSrcHSubSample);

  2254.     c->chrSrcH= -((-srcH) >> c->chrSrcVSubSample);

  2255.     c->chrDstW= -((-dstW) >> c->chrDstHSubSample);

  2256.     c->chrDstH= -((-dstH) >> c->chrDstVSubSample);

  2257. 

  2258.     sws_setColorspaceDetails(c, Inverse_Table_6_9[SWS_CS_DEFAULT], srcRange, Inverse_Table_6_9[SWS_CS_DEFAULT] /* FIXME*/, dstRange, 0, 1<<16, 1<<16);

  2259. 

  2260.     /* unscaled special Cases */

  2261.     if (unscaled && !usesHFilter && !usesVFilter && (srcRange == dstRange || isBGR(dstFormat) || isRGB(dstFormat)))

  2262.     {

  2263.         /* yv12_to_nv12 */

  2264.         if (srcFormat == PIX_FMT_YUV420P && (dstFormat == PIX_FMT_NV12 || dstFormat == PIX_FMT_NV21))

  2265.         {

  2266.             c->swScale= PlanarToNV12Wrapper;

  2267.         }

  2268. #ifdef CONFIG_GPL

  2269.         /* yuv2bgr */

  2270.         if ((srcFormat==PIX_FMT_YUV420P || srcFormat==PIX_FMT_YUV422P) && (isBGR(dstFormat) || isRGB(dstFormat))

  2271.             && !(flags & SWS_ACCURATE_RND))

  2272.         {

  2273.             c->swScale= yuv2rgb_get_func_ptr(c);

  2274.         }

  2275. #endif

  2276. 

  2277.         if (srcFormat==PIX_FMT_YUV410P && dstFormat==PIX_FMT_YUV420P && !(flags & SWS_BITEXACT))

  2278.         {

  2279.             c->swScale= yvu9toyv12Wrapper;

  2280.         }

  2281. 

  2282.         /* bgr24toYV12 */

  2283.         if (srcFormat==PIX_FMT_BGR24 && dstFormat==PIX_FMT_YUV420P && !(flags & SWS_ACCURATE_RND))

  2284.             c->swScale= bgr24toyv12Wrapper;

  2285. 

  2286.         /* rgb/bgr -> rgb/bgr (no dither needed forms) */

  2287.         if (  (isBGR(srcFormat) || isRGB(srcFormat))

  2288.            && (isBGR(dstFormat) || isRGB(dstFormat))

  2289.            && srcFormat != PIX_FMT_BGR8      && dstFormat != PIX_FMT_BGR8

  2290.            && srcFormat != PIX_FMT_RGB8      && dstFormat != PIX_FMT_RGB8

  2291.            && srcFormat != PIX_FMT_BGR4      && dstFormat != PIX_FMT_BGR4

  2292.            && srcFormat != PIX_FMT_RGB4      && dstFormat != PIX_FMT_RGB4

  2293.            && srcFormat != PIX_FMT_BGR4_BYTE && dstFormat != PIX_FMT_BGR4_BYTE

  2294.            && srcFormat != PIX_FMT_RGB4_BYTE && dstFormat != PIX_FMT_RGB4_BYTE

  2295.            && srcFormat != PIX_FMT_MONOBLACK && dstFormat != PIX_FMT_MONOBLACK

  2296.            && srcFormat != PIX_FMT_MONOWHITE && dstFormat != PIX_FMT_MONOWHITE

  2297.                                              && dstFormat != PIX_FMT_RGB32_1

  2298.                                              && dstFormat != PIX_FMT_BGR32_1

  2299.            && (!needsDither || (c->flags&(SWS_FAST_BILINEAR|SWS_POINT))))

  2300.              c->swScale= rgb2rgbWrapper;

  2301. 

  2302.         if (srcFormat == PIX_FMT_YUV422P)

  2303.         {

  2304.             if (dstFormat == PIX_FMT_YUYV422)

  2305.                 c->swScale= YUV422PToYuy2Wrapper;

  2306.             else if (dstFormat == PIX_FMT_UYVY422)

  2307.                 c->swScale= YUV422PToUyvyWrapper;

  2308.         }

  2309. 

  2310.         /* LQ converters if -sws 0 or -sws 4*/

  2311.         if (c->flags&(SWS_FAST_BILINEAR|SWS_POINT)){

  2312.             /* yv12_to_yuy2 */

  2313.             if (srcFormat == PIX_FMT_YUV420P)

  2314.             {

  2315.                 if (dstFormat == PIX_FMT_YUYV422)

  2316.                     c->swScale= PlanarToYuy2Wrapper;

  2317.                 else if (dstFormat == PIX_FMT_UYVY422)

  2318.                     c->swScale= PlanarToUyvyWrapper;

  2319.             }

  2320.         }

  2321. 

  2322. #ifdef COMPILE_ALTIVEC

  2323.         if ((c->flags & SWS_CPU_CAPS_ALTIVEC) &&

  2324.             srcFormat == PIX_FMT_YUV420P) {

  2325.           // unscaled YV12 -> packed YUV, we want speed

  2326.           if (dstFormat == PIX_FMT_YUYV422)

  2327.               c->swScale= yv12toyuy2_unscaled_altivec;

  2328.           else if (dstFormat == PIX_FMT_UYVY422)

  2329.               c->swScale= yv12touyvy_unscaled_altivec;

  2330.         }

  2331. #endif

  2332. 

  2333.         /* simple copy */

  2334.         if (  srcFormat == dstFormat

  2335.             || (isPlanarYUV(srcFormat) && isGray(dstFormat))

  2336.             || (isPlanarYUV(dstFormat) && isGray(srcFormat)))

  2337.         {

  2338.             if (isPacked(c->srcFormat))

  2339.                 c->swScale= packedCopy;

  2340.             else /* Planar YUV or gray */

  2341.                 c->swScale= planarCopy;

  2342.         }

  2343. 

  2344.         /* gray16{le,be} conversions */

  2345.         if (isGray16(srcFormat) && (isPlanarYUV(dstFormat) || (dstFormat == PIX_FMT_GRAY8)))

  2346.         {

  2347.             c->swScale= gray16togray;

  2348.         }

  2349.         if ((isPlanarYUV(srcFormat) || (srcFormat == PIX_FMT_GRAY8)) && isGray16(dstFormat))

  2350.         {

  2351.             c->swScale= graytogray16;

  2352.         }

  2353.         if (srcFormat != dstFormat && isGray16(srcFormat) && isGray16(dstFormat))

  2354.         {

  2355.             c->swScale= gray16swap;

  2356.         }

  2357. 

  2358. #ifdef ARCH_BFIN

  2359.         if (flags & SWS_CPU_CAPS_BFIN)

  2360.             ff_bfin_get_unscaled_swscale (c);

  2361. #endif

  2362. 

  2363.         if (c->swScale){

  2364.             if (flags&SWS_PRINT_INFO)

  2365.                 av_log(c, AV_LOG_INFO, "using unscaled %s -> %s special converter\n",

  2366.                                 sws_format_name(srcFormat), sws_format_name(dstFormat));

  2367.             return c;

  2368.         }

  2369.     }

  2370. 

  2371.     if (flags & SWS_CPU_CAPS_MMX2)

  2372.     {

  2373.         c->canMMX2BeUsed= (dstW >=srcW && (dstW&31)==0 && (srcW&15)==0) ? 1 : 0;

  2374.         if (!c->canMMX2BeUsed && dstW >=srcW && (srcW&15)==0 && (flags&SWS_FAST_BILINEAR))

  2375.         {

  2376.             if (flags&SWS_PRINT_INFO)

  2377.                 av_log(c, AV_LOG_INFO, "output Width is not a multiple of 32 -> no MMX2 scaler\n");

  2378.         }

  2379.         if (usesHFilter) c->canMMX2BeUsed=0;

  2380.     }

  2381.     else

  2382.         c->canMMX2BeUsed=0;

  2383. 

  2384.     c->chrXInc= ((c->chrSrcW<<16) + (c->chrDstW>>1))/c->chrDstW;

  2385.     c->chrYInc= ((c->chrSrcH<<16) + (c->chrDstH>>1))/c->chrDstH;

  2386. 

  2387.     // match pixel 0 of the src to pixel 0 of dst and match pixel n-2 of src to pixel n-2 of dst

  2388.     // but only for the FAST_BILINEAR mode otherwise do correct scaling

  2389.     // n-2 is the last chrominance sample available

  2390.     // this is not perfect, but no one should notice the difference, the more correct variant

  2391.     // would be like the vertical one, but that would require some special code for the

  2392.     // first and last pixel

  2393.     if (flags&SWS_FAST_BILINEAR)

  2394.     {

  2395.         if (c->canMMX2BeUsed)

  2396.         {

  2397.             c->lumXInc+= 20;

  2398.             c->chrXInc+= 20;

  2399.         }

  2400.         //we don't use the x86asm scaler if mmx is available

  2401.         else if (flags & SWS_CPU_CAPS_MMX)

  2402.         {

  2403.             c->lumXInc = ((srcW-2)<<16)/(dstW-2) - 20;

  2404.             c->chrXInc = ((c->chrSrcW-2)<<16)/(c->chrDstW-2) - 20;

  2405.         }

  2406.     }

  2407. 

  2408.     /* precalculate horizontal scaler filter coefficients */

  2409.     {

  2410.         const int filterAlign=

  2411.             (flags & SWS_CPU_CAPS_MMX) ? 4 :

  2412.             (flags & SWS_CPU_CAPS_ALTIVEC) ? 8 :

  2413.             1;

  2414. 

  2415.         initFilter(&c->hLumFilter, &c->hLumFilterPos, &c->hLumFilterSize, c->lumXInc,

  2416.                    srcW      ,       dstW, filterAlign, 1<<14,

  2417.                    (flags&SWS_BICUBLIN) ? (flags|SWS_BICUBIC)  : flags,

  2418.                    srcFilter->lumH, dstFilter->lumH, c->param);

  2419.         initFilter(&c->hChrFilter, &c->hChrFilterPos, &c->hChrFilterSize, c->chrXInc,

  2420.                    c->chrSrcW, c->chrDstW, filterAlign, 1<<14,

  2421.                    (flags&SWS_BICUBLIN) ? (flags|SWS_BILINEAR) : flags,

  2422.                    srcFilter->chrH, dstFilter->chrH, c->param);

  2423. 

  2424. #define MAX_FUNNY_CODE_SIZE 10000

  2425. #if defined(COMPILE_MMX2)

  2426. // can't downscale !!!

  2427.         if (c->canMMX2BeUsed && (flags & SWS_FAST_BILINEAR))

  2428.         {

  2429. #ifdef MAP_ANONYMOUS

  2430.             c->funnyYCode = (uint8_t*)mmap(NULL, MAX_FUNNY_CODE_SIZE, PROT_EXEC | PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, 0, 0);

  2431.             c->funnyUVCode = (uint8_t*)mmap(NULL, MAX_FUNNY_CODE_SIZE, PROT_EXEC | PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, 0, 0);

  2432. #else

  2433.             c->funnyYCode = av_malloc(MAX_FUNNY_CODE_SIZE);

  2434.             c->funnyUVCode = av_malloc(MAX_FUNNY_CODE_SIZE);

  2435. #endif

  2436. 

  2437.             c->lumMmx2Filter   = av_malloc((dstW        /8+8)*sizeof(int16_t));

  2438.             c->chrMmx2Filter   = av_malloc((c->chrDstW  /4+8)*sizeof(int16_t));

  2439.             c->lumMmx2FilterPos= av_malloc((dstW      /2/8+8)*sizeof(int32_t));

  2440.             c->chrMmx2FilterPos= av_malloc((c->chrDstW/2/4+8)*sizeof(int32_t));

  2441. 

  2442.             initMMX2HScaler(      dstW, c->lumXInc, c->funnyYCode , c->lumMmx2Filter, c->lumMmx2FilterPos, 8);

  2443.             initMMX2HScaler(c->chrDstW, c->chrXInc, c->funnyUVCode, c->chrMmx2Filter, c->chrMmx2FilterPos, 4);

  2444.         }

  2445. #endif /* defined(COMPILE_MMX2) */

  2446.     } // Init Horizontal stuff

  2447. 

  2448. 

  2449. 

  2450.     /* precalculate vertical scaler filter coefficients */

  2451.     {

  2452.         const int filterAlign=

  2453.             (flags & SWS_CPU_CAPS_MMX) && (flags & SWS_ACCURATE_RND) ? 2 :

  2454.             (flags & SWS_CPU_CAPS_ALTIVEC) ? 8 :

  2455.             1;

  2456. 

  2457.         initFilter(&c->vLumFilter, &c->vLumFilterPos, &c->vLumFilterSize, c->lumYInc,

  2458.                    srcH      ,        dstH, filterAlign, (1<<12),

  2459.                    (flags&SWS_BICUBLIN) ? (flags|SWS_BICUBIC)  : flags,

  2460.                    srcFilter->lumV, dstFilter->lumV, c->param);

  2461.         initFilter(&c->vChrFilter, &c->vChrFilterPos, &c->vChrFilterSize, c->chrYInc,

  2462.                    c->chrSrcH, c->chrDstH, filterAlign, (1<<12),

  2463.                    (flags&SWS_BICUBLIN) ? (flags|SWS_BILINEAR) : flags,

  2464.                    srcFilter->chrV, dstFilter->chrV, c->param);

  2465. 

  2466. #ifdef HAVE_ALTIVEC

  2467.         c->vYCoeffsBank = av_malloc(sizeof (vector signed short)*c->vLumFilterSize*c->dstH);

  2468.         c->vCCoeffsBank = av_malloc(sizeof (vector signed short)*c->vChrFilterSize*c->chrDstH);

  2469. 

  2470.         for (i=0;i<c->vLumFilterSize*c->dstH;i++) {

  2471.             int j;

  2472.             short *p = (short *)&c->vYCoeffsBank[i];

  2473.             for (j=0;j<8;j++)

  2474.                 p[j] = c->vLumFilter[i];

  2475.         }

  2476. 

  2477.         for (i=0;i<c->vChrFilterSize*c->chrDstH;i++) {

  2478.             int j;

  2479.             short *p = (short *)&c->vCCoeffsBank[i];

  2480.             for (j=0;j<8;j++)

  2481.                 p[j] = c->vChrFilter[i];

  2482.         }

  2483. #endif

  2484.     }

  2485. 

  2486.     // Calculate Buffer Sizes so that they won't run out while handling these damn slices

  2487.     c->vLumBufSize= c->vLumFilterSize;

  2488.     c->vChrBufSize= c->vChrFilterSize;

  2489.     for (i=0; i<dstH; i++)

  2490.     {

  2491.         int chrI= i*c->chrDstH / dstH;

  2492.         int nextSlice= FFMAX(c->vLumFilterPos[i   ] + c->vLumFilterSize - 1,

  2493.                            ((c->vChrFilterPos[chrI] + c->vChrFilterSize - 1)<<c->chrSrcVSubSample));

  2494. 

  2495.         nextSlice>>= c->chrSrcVSubSample;

  2496.         nextSlice<<= c->chrSrcVSubSample;

  2497.         if (c->vLumFilterPos[i   ] + c->vLumBufSize < nextSlice)

  2498.             c->vLumBufSize= nextSlice - c->vLumFilterPos[i];

  2499.         if (c->vChrFilterPos[chrI] + c->vChrBufSize < (nextSlice>>c->chrSrcVSubSample))

  2500.             c->vChrBufSize= (nextSlice>>c->chrSrcVSubSample) - c->vChrFilterPos[chrI];

  2501.     }

  2502. 

  2503.     // allocate pixbufs (we use dynamic allocation because otherwise we would need to

  2504.     c->lumPixBuf= av_malloc(c->vLumBufSize*2*sizeof(int16_t*));

  2505.     c->chrPixBuf= av_malloc(c->vChrBufSize*2*sizeof(int16_t*));

  2506.     //Note we need at least one pixel more at the end because of the mmx code (just in case someone wanna replace the 4000/8000)

  2507.     /* align at 16 bytes for AltiVec */

  2508.     for (i=0; i<c->vLumBufSize; i++)

  2509.         c->lumPixBuf[i]= c->lumPixBuf[i+c->vLumBufSize]= av_mallocz(VOF+1);

  2510.     for (i=0; i<c->vChrBufSize; i++)

  2511.         c->chrPixBuf[i]= c->chrPixBuf[i+c->vChrBufSize]= av_malloc((VOF+1)*2);

  2512. 

  2513.     //try to avoid drawing green stuff between the right end and the stride end

  2514.     for (i=0; i<c->vChrBufSize; i++) memset(c->chrPixBuf[i], 64, (VOF+1)*2);

  2515. 

  2516.     assert(2*VOFW == VOF);

  2517. 

  2518.     assert(c->chrDstH <= dstH);

  2519. 

  2520.     if (flags&SWS_PRINT_INFO)

  2521.     {

  2522. #ifdef DITHER1XBPP

  2523.         const char *dither= " dithered";

  2524. #else

  2525.         const char *dither= "";

  2526. #endif

  2527.         if (flags&SWS_FAST_BILINEAR)

  2528.             av_log(c, AV_LOG_INFO, "FAST_BILINEAR scaler, ");

  2529.         else if (flags&SWS_BILINEAR)

  2530.             av_log(c, AV_LOG_INFO, "BILINEAR scaler, ");

  2531.         else if (flags&SWS_BICUBIC)

  2532.             av_log(c, AV_LOG_INFO, "BICUBIC scaler, ");

  2533.         else if (flags&SWS_X)

  2534.             av_log(c, AV_LOG_INFO, "Experimental scaler, ");

  2535.         else if (flags&SWS_POINT)

  2536.             av_log(c, AV_LOG_INFO, "Nearest Neighbor / POINT scaler, ");

  2537.         else if (flags&SWS_AREA)

  2538.             av_log(c, AV_LOG_INFO, "Area Averageing scaler, ");

  2539.         else if (flags&SWS_BICUBLIN)

  2540.             av_log(c, AV_LOG_INFO, "luma BICUBIC / chroma BILINEAR scaler, ");

  2541.         else if (flags&SWS_GAUSS)

  2542.             av_log(c, AV_LOG_INFO, "Gaussian scaler, ");

  2543.         else if (flags&SWS_SINC)

  2544.             av_log(c, AV_LOG_INFO, "Sinc scaler, ");

  2545.         else if (flags&SWS_LANCZOS)

  2546.             av_log(c, AV_LOG_INFO, "Lanczos scaler, ");

  2547.         else if (flags&SWS_SPLINE)

  2548.             av_log(c, AV_LOG_INFO, "Bicubic spline scaler, ");

  2549.         else

  2550.             av_log(c, AV_LOG_INFO, "ehh flags invalid?! ");

  2551. 

  2552.         if (dstFormat==PIX_FMT_BGR555 || dstFormat==PIX_FMT_BGR565)

  2553.             av_log(c, AV_LOG_INFO, "from %s to%s %s ",

  2554.                    sws_format_name(srcFormat), dither, sws_format_name(dstFormat));

  2555.         else

  2556.             av_log(c, AV_LOG_INFO, "from %s to %s ",

  2557.                    sws_format_name(srcFormat), sws_format_name(dstFormat));

  2558. 

  2559.         if (flags & SWS_CPU_CAPS_MMX2)

  2560.             av_log(c, AV_LOG_INFO, "using MMX2\n");

  2561.         else if (flags & SWS_CPU_CAPS_3DNOW)

  2562.             av_log(c, AV_LOG_INFO, "using 3DNOW\n");

  2563.         else if (flags & SWS_CPU_CAPS_MMX)

  2564.             av_log(c, AV_LOG_INFO, "using MMX\n");

  2565.         else if (flags & SWS_CPU_CAPS_ALTIVEC)

  2566.             av_log(c, AV_LOG_INFO, "using AltiVec\n");

  2567.         else

  2568.             av_log(c, AV_LOG_INFO, "using C\n");

  2569.     }

  2570. 

  2571.     if (flags & SWS_PRINT_INFO)

  2572.     {

  2573.         if (flags & SWS_CPU_CAPS_MMX)

  2574.         {

  2575.             if (c->canMMX2BeUsed && (flags&SWS_FAST_BILINEAR))

  2576.                 av_log(c, AV_LOG_VERBOSE, "using FAST_BILINEAR MMX2 scaler for horizontal scaling\n");

  2577.             else

  2578.             {

  2579.                 if (c->hLumFilterSize==4)

  2580.                     av_log(c, AV_LOG_VERBOSE, "using 4-tap MMX scaler for horizontal luminance scaling\n");

  2581.                 else if (c->hLumFilterSize==8)

  2582.                     av_log(c, AV_LOG_VERBOSE, "using 8-tap MMX scaler for horizontal luminance scaling\n");

  2583.                 else

  2584.                     av_log(c, AV_LOG_VERBOSE, "using n-tap MMX scaler for horizontal luminance scaling\n");

  2585. 

  2586.                 if (c->hChrFilterSize==4)

  2587.                     av_log(c, AV_LOG_VERBOSE, "using 4-tap MMX scaler for horizontal chrominance scaling\n");

  2588.                 else if (c->hChrFilterSize==8)

  2589.                     av_log(c, AV_LOG_VERBOSE, "using 8-tap MMX scaler for horizontal chrominance scaling\n");

  2590.                 else

  2591.                     av_log(c, AV_LOG_VERBOSE, "using n-tap MMX scaler for horizontal chrominance scaling\n");

  2592.             }

  2593.         }

  2594.         else

  2595.         {

  2596. #if defined(ARCH_X86)

  2597.             av_log(c, AV_LOG_VERBOSE, "using X86-Asm scaler for horizontal scaling\n");

  2598. #else

  2599.             if (flags & SWS_FAST_BILINEAR)

  2600.                 av_log(c, AV_LOG_VERBOSE, "using FAST_BILINEAR C scaler for horizontal scaling\n");

  2601.             else

  2602.                 av_log(c, AV_LOG_VERBOSE, "using C scaler for horizontal scaling\n");

  2603. #endif

  2604.         }

  2605.         if (isPlanarYUV(dstFormat))

  2606.         {

  2607.             if (c->vLumFilterSize==1)

  2608.                 av_log(c, AV_LOG_VERBOSE, "using 1-tap %s \"scaler\" for vertical scaling (YV12 like)\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");

  2609.             else

  2610.                 av_log(c, AV_LOG_VERBOSE, "using n-tap %s scaler for vertical scaling (YV12 like)\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");

  2611.         }

  2612.         else

  2613.         {

  2614.             if (c->vLumFilterSize==1 && c->vChrFilterSize==2)

  2615.                 av_log(c, AV_LOG_VERBOSE, "using 1-tap %s \"scaler\" for vertical luminance scaling (BGR)\n"

  2616.                        "      2-tap scaler for vertical chrominance scaling (BGR)\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");

  2617.             else if (c->vLumFilterSize==2 && c->vChrFilterSize==2)

  2618.                 av_log(c, AV_LOG_VERBOSE, "using 2-tap linear %s scaler for vertical scaling (BGR)\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");

  2619.             else

  2620.                 av_log(c, AV_LOG_VERBOSE, "using n-tap %s scaler for vertical scaling (BGR)\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");

  2621.         }

  2622. 

  2623.         if (dstFormat==PIX_FMT_BGR24)

  2624.             av_log(c, AV_LOG_VERBOSE, "using %s YV12->BGR24 Converter\n",

  2625.                    (flags & SWS_CPU_CAPS_MMX2) ? "MMX2" : ((flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C"));

  2626.         else if (dstFormat==PIX_FMT_RGB32)

  2627.             av_log(c, AV_LOG_VERBOSE, "using %s YV12->BGR32 Converter\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");

  2628.         else if (dstFormat==PIX_FMT_BGR565)

  2629.             av_log(c, AV_LOG_VERBOSE, "using %s YV12->BGR16 Converter\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");

  2630.         else if (dstFormat==PIX_FMT_BGR555)

  2631.             av_log(c, AV_LOG_VERBOSE, "using %s YV12->BGR15 Converter\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");

  2632. 

  2633.         av_log(c, AV_LOG_VERBOSE, "%dx%d -> %dx%d\n", srcW, srcH, dstW, dstH);

  2634.     }

  2635.     if (flags & SWS_PRINT_INFO)

  2636.     {

  2637.         av_log(c, AV_LOG_DEBUG, "Lum srcW=%d srcH=%d dstW=%d dstH=%d xInc=%d yInc=%d\n",

  2638.                c->srcW, c->srcH, c->dstW, c->dstH, c->lumXInc, c->lumYInc);

  2639.         av_log(c, AV_LOG_DEBUG, "Chr srcW=%d srcH=%d dstW=%d dstH=%d xInc=%d yInc=%d\n",

  2640.                c->chrSrcW, c->chrSrcH, c->chrDstW, c->chrDstH, c->chrXInc, c->chrYInc);

  2641.     }

  2642. 

  2643.     c->swScale= getSwsFunc(flags);

  2644.     return c;

  2645. }

  2646. 

  2647. /**

  2648.  * swscale wrapper, so we don't need to export the SwsContext.

  2649.  * assumes planar YUV to be in YUV order instead of YVU

  2650.  */

  2651. int sws_scale(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  2652.               int srcSliceH, uint8_t* dst[], int dstStride[]){

  2653.     int i;

  2654.     uint8_t* src2[4]= {src[0], src[1], src[2]};

  2655.     uint32_t pal[256];

  2656.     int use_pal=   c->srcFormat == PIX_FMT_PAL8

  2657.                 || c->srcFormat == PIX_FMT_BGR4_BYTE

  2658.                 || c->srcFormat == PIX_FMT_RGB4_BYTE

  2659.                 || c->srcFormat == PIX_FMT_BGR8

  2660.                 || c->srcFormat == PIX_FMT_RGB8;

  2661. 

  2662.     if (c->sliceDir == 0 && srcSliceY != 0 && srcSliceY + srcSliceH != c->srcH) {

  2663.         av_log(c, AV_LOG_ERROR, "Slices start in the middle!\n");

  2664.         return 0;

  2665.     }

  2666.     if (c->sliceDir == 0) {

  2667.         if (srcSliceY == 0) c->sliceDir = 1; else c->sliceDir = -1;

  2668.     }

  2669. 

  2670.     if (use_pal){

  2671.         for (i=0; i<256; i++){

  2672.             int p, r, g, b,y,u,v;

  2673.             if(c->srcFormat == PIX_FMT_PAL8){

  2674.                 p=((uint32_t*)(src[1]))[i];

  2675.                 r= (p>>16)&0xFF;

  2676.                 g= (p>> 8)&0xFF;

  2677.                 b=  p     &0xFF;

  2678.             }else if(c->srcFormat == PIX_FMT_RGB8){

  2679.                 r= (i>>5    )*36;

  2680.                 g= ((i>>2)&7)*36;

  2681.                 b= (i&3     )*85;

  2682.             }else if(c->srcFormat == PIX_FMT_BGR8){

  2683.                 b= (i>>6    )*85;

  2684.                 g= ((i>>3)&7)*36;

  2685.                 r= (i&7     )*36;

  2686.             }else if(c->srcFormat == PIX_FMT_RGB4_BYTE){

  2687.                 r= (i>>3    )*255;

  2688.                 g= ((i>>1)&3)*85;

  2689.                 b= (i&1     )*255;

  2690.             }else if(c->srcFormat == PIX_FMT_BGR4_BYTE){

  2691.                 b= (i>>3    )*255;

  2692.                 g= ((i>>1)&3)*85;

  2693.                 r= (i&1     )*255;

  2694.             }

  2695.             y= av_clip_uint8((RY*r + GY*g + BY*b + ( 33<<(RGB2YUV_SHIFT-1)))>>RGB2YUV_SHIFT);

  2696.             u= av_clip_uint8((RU*r + GU*g + BU*b + (257<<(RGB2YUV_SHIFT-1)))>>RGB2YUV_SHIFT);

  2697.             v= av_clip_uint8((RV*r + GV*g + BV*b + (257<<(RGB2YUV_SHIFT-1)))>>RGB2YUV_SHIFT);

  2698.             pal[i]= y + (u<<8) + (v<<16);

  2699.         }

  2700.         src2[1]= (uint8_t*)pal;

  2701.     }

  2702. 

  2703.     // copy strides, so they can safely be modified

  2704.     if (c->sliceDir == 1) {

  2705.         // slices go from top to bottom

  2706.         int srcStride2[4]= {srcStride[0], srcStride[1], srcStride[2]};

  2707.         int dstStride2[4]= {dstStride[0], dstStride[1], dstStride[2]};

  2708.         return c->swScale(c, src2, srcStride2, srcSliceY, srcSliceH, dst, dstStride2);

  2709.     } else {

  2710.         // slices go from bottom to top => we flip the image internally

  2711.         uint8_t* dst2[4]= {dst[0] + (c->dstH-1)*dstStride[0],

  2712.                            dst[1] + ((c->dstH>>c->chrDstVSubSample)-1)*dstStride[1],

  2713.                            dst[2] + ((c->dstH>>c->chrDstVSubSample)-1)*dstStride[2]};

  2714.         int srcStride2[4]= {-srcStride[0], -srcStride[1], -srcStride[2]};

  2715.         int dstStride2[4]= {-dstStride[0], -dstStride[1], -dstStride[2]};

  2716. 

  2717.         src2[0] += (srcSliceH-1)*srcStride[0];

  2718.         if (!use_pal)

  2719.             src2[1] += ((srcSliceH>>c->chrSrcVSubSample)-1)*srcStride[1];

  2720.         src2[2] += ((srcSliceH>>c->chrSrcVSubSample)-1)*srcStride[2];

  2721. 

  2722.         return c->swScale(c, src2, srcStride2, c->srcH-srcSliceY-srcSliceH, srcSliceH, dst2, dstStride2);

  2723.     }

  2724. }

  2725. 

  2726. /**

  2727.  * swscale wrapper, so we don't need to export the SwsContext

  2728.  */

  2729. int sws_scale_ordered(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  2730.                       int srcSliceH, uint8_t* dst[], int dstStride[]){

  2731.     return sws_scale(c, src, srcStride, srcSliceY, srcSliceH, dst, dstStride);

  2732. }

  2733. 

  2734. SwsFilter *sws_getDefaultFilter(float lumaGBlur, float chromaGBlur,

  2735.                                 float lumaSharpen, float chromaSharpen,

  2736.                                 float chromaHShift, float chromaVShift,

  2737.                                 int verbose)

  2738. {

  2739.     SwsFilter *filter= av_malloc(sizeof(SwsFilter));

  2740. 

  2741.     if (lumaGBlur!=0.0){

  2742.         filter->lumH= sws_getGaussianVec(lumaGBlur, 3.0);

  2743.         filter->lumV= sws_getGaussianVec(lumaGBlur, 3.0);

  2744.     }else{

  2745.         filter->lumH= sws_getIdentityVec();

  2746.         filter->lumV= sws_getIdentityVec();

  2747.     }

  2748. 

  2749.     if (chromaGBlur!=0.0){

  2750.         filter->chrH= sws_getGaussianVec(chromaGBlur, 3.0);

  2751.         filter->chrV= sws_getGaussianVec(chromaGBlur, 3.0);

  2752.     }else{

  2753.         filter->chrH= sws_getIdentityVec();

  2754.         filter->chrV= sws_getIdentityVec();

  2755.     }

  2756. 

  2757.     if (chromaSharpen!=0.0){

  2758.         SwsVector *id= sws_getIdentityVec();

  2759.         sws_scaleVec(filter->chrH, -chromaSharpen);

  2760.         sws_scaleVec(filter->chrV, -chromaSharpen);

  2761.         sws_addVec(filter->chrH, id);

  2762.         sws_addVec(filter->chrV, id);

  2763.         sws_freeVec(id);

  2764.     }

  2765. 

  2766.     if (lumaSharpen!=0.0){

  2767.         SwsVector *id= sws_getIdentityVec();

  2768.         sws_scaleVec(filter->lumH, -lumaSharpen);

  2769.         sws_scaleVec(filter->lumV, -lumaSharpen);

  2770.         sws_addVec(filter->lumH, id);

  2771.         sws_addVec(filter->lumV, id);

  2772.         sws_freeVec(id);

  2773.     }

  2774. 

  2775.     if (chromaHShift != 0.0)

  2776.         sws_shiftVec(filter->chrH, (int)(chromaHShift+0.5));

  2777. 

  2778.     if (chromaVShift != 0.0)

  2779.         sws_shiftVec(filter->chrV, (int)(chromaVShift+0.5));

  2780. 

  2781.     sws_normalizeVec(filter->chrH, 1.0);

  2782.     sws_normalizeVec(filter->chrV, 1.0);

  2783.     sws_normalizeVec(filter->lumH, 1.0);

  2784.     sws_normalizeVec(filter->lumV, 1.0);

  2785. 

  2786.     if (verbose) sws_printVec(filter->chrH);

  2787.     if (verbose) sws_printVec(filter->lumH);

  2788. 

  2789.     return filter;

  2790. }

  2791. 

  2792. /**

  2793.  * returns a normalized gaussian curve used to filter stuff

  2794.  * quality=3 is high quality, lowwer is lowwer quality

  2795.  */

  2796. SwsVector *sws_getGaussianVec(double variance, double quality){

  2797.     const int length= (int)(variance*quality + 0.5) | 1;

  2798.     int i;

  2799.     double *coeff= av_malloc(length*sizeof(double));

  2800.     double middle= (length-1)*0.5;

  2801.     SwsVector *vec= av_malloc(sizeof(SwsVector));

  2802. 

  2803.     vec->coeff= coeff;

  2804.     vec->length= length;

  2805. 

  2806.     for (i=0; i<length; i++)

  2807.     {

  2808.         double dist= i-middle;

  2809.         coeff[i]= exp(-dist*dist/(2*variance*variance)) / sqrt(2*variance*PI);

  2810.     }

  2811. 

  2812.     sws_normalizeVec(vec, 1.0);

  2813. 

  2814.     return vec;

  2815. }

  2816. 

  2817. SwsVector *sws_getConstVec(double c, int length){

  2818.     int i;

  2819.     double *coeff= av_malloc(length*sizeof(double));

  2820.     SwsVector *vec= av_malloc(sizeof(SwsVector));

  2821. 

  2822.     vec->coeff= coeff;

  2823.     vec->length= length;

  2824. 

  2825.     for (i=0; i<length; i++)

  2826.         coeff[i]= c;

  2827. 

  2828.     return vec;

  2829. }

  2830. 

  2831. 

  2832. SwsVector *sws_getIdentityVec(void){

  2833.     return sws_getConstVec(1.0, 1);

  2834. }

  2835. 

  2836. double sws_dcVec(SwsVector *a){

  2837.     int i;

  2838.     double sum=0;

  2839. 

  2840.     for (i=0; i<a->length; i++)

  2841.         sum+= a->coeff[i];

  2842. 

  2843.     return sum;

  2844. }

  2845. 

  2846. void sws_scaleVec(SwsVector *a, double scalar){

  2847.     int i;

  2848. 

  2849.     for (i=0; i<a->length; i++)

  2850.         a->coeff[i]*= scalar;

  2851. }

  2852. 

  2853. void sws_normalizeVec(SwsVector *a, double height){

  2854.     sws_scaleVec(a, height/sws_dcVec(a));

  2855. }

  2856. 

  2857. static SwsVector *sws_getConvVec(SwsVector *a, SwsVector *b){

  2858.     int length= a->length + b->length - 1;

  2859.     double *coeff= av_malloc(length*sizeof(double));

  2860.     int i, j;

  2861.     SwsVector *vec= av_malloc(sizeof(SwsVector));

  2862. 

  2863.     vec->coeff= coeff;

  2864.     vec->length= length;

  2865. 

  2866.     for (i=0; i<length; i++) coeff[i]= 0.0;

  2867. 

  2868.     for (i=0; i<a->length; i++)

  2869.     {

  2870.         for (j=0; j<b->length; j++)

  2871.         {

  2872.             coeff[i+j]+= a->coeff[i]*b->coeff[j];

  2873.         }

  2874.     }

  2875. 

  2876.     return vec;

  2877. }

  2878. 

  2879. static SwsVector *sws_sumVec(SwsVector *a, SwsVector *b){

  2880.     int length= FFMAX(a->length, b->length);

  2881.     double *coeff= av_malloc(length*sizeof(double));

  2882.     int i;

  2883.     SwsVector *vec= av_malloc(sizeof(SwsVector));

  2884. 

  2885.     vec->coeff= coeff;

  2886.     vec->length= length;

  2887. 

  2888.     for (i=0; i<length; i++) coeff[i]= 0.0;

  2889. 

  2890.     for (i=0; i<a->length; i++) coeff[i + (length-1)/2 - (a->length-1)/2]+= a->coeff[i];

  2891.     for (i=0; i<b->length; i++) coeff[i + (length-1)/2 - (b->length-1)/2]+= b->coeff[i];

  2892. 

  2893.     return vec;

  2894. }

  2895. 

  2896. static SwsVector *sws_diffVec(SwsVector *a, SwsVector *b){

  2897.     int length= FFMAX(a->length, b->length);

  2898.     double *coeff= av_malloc(length*sizeof(double));

  2899.     int i;

  2900.     SwsVector *vec= av_malloc(sizeof(SwsVector));

  2901. 

  2902.     vec->coeff= coeff;

  2903.     vec->length= length;

  2904. 

  2905.     for (i=0; i<length; i++) coeff[i]= 0.0;

  2906. 

  2907.     for (i=0; i<a->length; i++) coeff[i + (length-1)/2 - (a->length-1)/2]+= a->coeff[i];

  2908.     for (i=0; i<b->length; i++) coeff[i + (length-1)/2 - (b->length-1)/2]-= b->coeff[i];

  2909. 

  2910.     return vec;

  2911. }

  2912. 

  2913. /* shift left / or right if "shift" is negative */

  2914. static SwsVector *sws_getShiftedVec(SwsVector *a, int shift){

  2915.     int length= a->length + FFABS(shift)*2;

  2916.     double *coeff= av_malloc(length*sizeof(double));

  2917.     int i;

  2918.     SwsVector *vec= av_malloc(sizeof(SwsVector));

  2919. 

  2920.     vec->coeff= coeff;

  2921.     vec->length= length;

  2922. 

  2923.     for (i=0; i<length; i++) coeff[i]= 0.0;

  2924. 

  2925.     for (i=0; i<a->length; i++)

  2926.     {

  2927.         coeff[i + (length-1)/2 - (a->length-1)/2 - shift]= a->coeff[i];

  2928.     }

  2929. 

  2930.     return vec;

  2931. }

  2932. 

  2933. void sws_shiftVec(SwsVector *a, int shift){

  2934.     SwsVector *shifted= sws_getShiftedVec(a, shift);

  2935.     av_free(a->coeff);

  2936.     a->coeff= shifted->coeff;

  2937.     a->length= shifted->length;

  2938.     av_free(shifted);

  2939. }

  2940. 

  2941. void sws_addVec(SwsVector *a, SwsVector *b){

  2942.     SwsVector *sum= sws_sumVec(a, b);

  2943.     av_free(a->coeff);

  2944.     a->coeff= sum->coeff;

  2945.     a->length= sum->length;

  2946.     av_free(sum);

  2947. }

  2948. 

  2949. void sws_subVec(SwsVector *a, SwsVector *b){

  2950.     SwsVector *diff= sws_diffVec(a, b);

  2951.     av_free(a->coeff);

  2952.     a->coeff= diff->coeff;

  2953.     a->length= diff->length;

  2954.     av_free(diff);

  2955. }

  2956. 

  2957. void sws_convVec(SwsVector *a, SwsVector *b){

  2958.     SwsVector *conv= sws_getConvVec(a, b);

  2959.     av_free(a->coeff);

  2960.     a->coeff= conv->coeff;

  2961.     a->length= conv->length;

  2962.     av_free(conv);

  2963. }

  2964. 

  2965. SwsVector *sws_cloneVec(SwsVector *a){

  2966.     double *coeff= av_malloc(a->length*sizeof(double));

  2967.     int i;

  2968.     SwsVector *vec= av_malloc(sizeof(SwsVector));

  2969. 

  2970.     vec->coeff= coeff;

  2971.     vec->length= a->length;

  2972. 

  2973.     for (i=0; i<a->length; i++) coeff[i]= a->coeff[i];

  2974. 

  2975.     return vec;

  2976. }

  2977. 

  2978. void sws_printVec(SwsVector *a){

  2979.     int i;

  2980.     double max=0;

  2981.     double min=0;

  2982.     double range;

  2983. 

  2984.     for (i=0; i<a->length; i++)

  2985.         if (a->coeff[i]>max) max= a->coeff[i];

  2986. 

  2987.     for (i=0; i<a->length; i++)

  2988.         if (a->coeff[i]<min) min= a->coeff[i];

  2989. 

  2990.     range= max - min;

  2991. 

  2992.     for (i=0; i<a->length; i++)

  2993.     {

  2994.         int x= (int)((a->coeff[i]-min)*60.0/range +0.5);

  2995.         av_log(NULL, AV_LOG_DEBUG, "%1.3f ", a->coeff[i]);

  2996.         for (;x>0; x--) av_log(NULL, AV_LOG_DEBUG, " ");

  2997.         av_log(NULL, AV_LOG_DEBUG, "|\n");

  2998.     }

  2999. }

  3000. 

  3001. void sws_freeVec(SwsVector *a){

  3002.     if (!a) return;

  3003.     av_freep(&a->coeff);

  3004.     a->length=0;

  3005.     av_free(a);

  3006. }

  3007. 

  3008. void sws_freeFilter(SwsFilter *filter){

  3009.     if (!filter) return;

  3010. 

  3011.     if (filter->lumH) sws_freeVec(filter->lumH);

  3012.     if (filter->lumV) sws_freeVec(filter->lumV);

  3013.     if (filter->chrH) sws_freeVec(filter->chrH);

  3014.     if (filter->chrV) sws_freeVec(filter->chrV);

  3015.     av_free(filter);

  3016. }

  3017. 

  3018. 

  3019. void sws_freeContext(SwsContext *c){

  3020.     int i;

  3021.     if (!c) return;

  3022. 

  3023.     if (c->lumPixBuf)

  3024.     {

  3025.         for (i=0; i<c->vLumBufSize; i++)

  3026.             av_freep(&c->lumPixBuf[i]);

  3027.         av_freep(&c->lumPixBuf);

  3028.     }

  3029. 

  3030.     if (c->chrPixBuf)

  3031.     {

  3032.         for (i=0; i<c->vChrBufSize; i++)

  3033.             av_freep(&c->chrPixBuf[i]);

  3034.         av_freep(&c->chrPixBuf);

  3035.     }

  3036. 

  3037.     av_freep(&c->vLumFilter);

  3038.     av_freep(&c->vChrFilter);

  3039.     av_freep(&c->hLumFilter);

  3040.     av_freep(&c->hChrFilter);

  3041. #ifdef HAVE_ALTIVEC

  3042.     av_freep(&c->vYCoeffsBank);

  3043.     av_freep(&c->vCCoeffsBank);

  3044. #endif

  3045. 

  3046.     av_freep(&c->vLumFilterPos);

  3047.     av_freep(&c->vChrFilterPos);

  3048.     av_freep(&c->hLumFilterPos);

  3049.     av_freep(&c->hChrFilterPos);

  3050. 

  3051. #if defined(ARCH_X86) && defined(CONFIG_GPL)

  3052. #ifdef MAP_ANONYMOUS

  3053.     if (c->funnyYCode) munmap(c->funnyYCode, MAX_FUNNY_CODE_SIZE);

  3054.     if (c->funnyUVCode) munmap(c->funnyUVCode, MAX_FUNNY_CODE_SIZE);

  3055. #else

  3056.     av_free(c->funnyYCode);

  3057.     av_free(c->funnyUVCode);

  3058. #endif

  3059.     c->funnyYCode=NULL;

  3060.     c->funnyUVCode=NULL;

  3061. #endif /* defined(ARCH_X86) */

  3062. 

  3063.     av_freep(&c->lumMmx2Filter);

  3064.     av_freep(&c->chrMmx2Filter);

  3065.     av_freep(&c->lumMmx2FilterPos);

  3066.     av_freep(&c->chrMmx2FilterPos);

  3067.     av_freep(&c->yuvTable);

  3068. 

  3069.     av_free(c);

  3070. }

  3071. 

  3072. /**

  3073.  * Checks if context is valid or reallocs a new one instead.

  3074.  * If context is NULL, just calls sws_getContext() to get a new one.

  3075.  * Otherwise, checks if the parameters are the same already saved in context.

  3076.  * If that is the case, returns the current context.

  3077.  * Otherwise, frees context and gets a new one.

  3078.  *

  3079.  * Be warned that srcFilter, dstFilter are not checked, they are

  3080.  * asumed to remain valid.

  3081.  */

  3082. struct SwsContext *sws_getCachedContext(struct SwsContext *context,

  3083.                                         int srcW, int srcH, int srcFormat,

  3084.                                         int dstW, int dstH, int dstFormat, int flags,

  3085.                                         SwsFilter *srcFilter, SwsFilter *dstFilter, double *param)

  3086. {

  3087.     static const double default_param[2] = {SWS_PARAM_DEFAULT, SWS_PARAM_DEFAULT};

  3088. 

  3089.     if (!param)

  3090.         param = default_param;

  3091. 

  3092.     if (context) {

  3093.         if (context->srcW != srcW || context->srcH != srcH ||

  3094.             context->srcFormat != srcFormat ||

  3095.             context->dstW != dstW || context->dstH != dstH ||

  3096.             context->dstFormat != dstFormat || context->flags != flags ||

  3097.             context->param[0] != param[0] || context->param[1] != param[1])

  3098.         {

  3099.             sws_freeContext(context);

  3100.             context = NULL;

  3101.         }

  3102.     }

  3103.     if (!context) {

  3104.         return sws_getContext(srcW, srcH, srcFormat,

  3105.                               dstW, dstH, dstFormat, flags,

  3106.                               srcFilter, dstFilter, param);

  3107.     }

  3108.     return context;

  3109. }