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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. #if 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. #if HAVE_VIRTUALALLOC

  72. #define WIN32_LEAN_AND_MEAN

  73. #include <windows.h>

  74. #endif

  75. #include "swscale.h"

  76. #include "swscale_internal.h"

  77. #include "rgb2rgb.h"

  78. #include "libavutil/x86_cpu.h"

  79. #include "libavutil/bswap.h"

  80. 

  81. unsigned swscale_version(void)

  82. {

  83.     return LIBSWSCALE_VERSION_INT;

  84. }

  85. 

  86. #undef MOVNTQ

  87. #undef PAVGB

  88. 

  89. //#undef HAVE_MMX2

  90. //#define HAVE_AMD3DNOW

  91. //#undef HAVE_MMX

  92. //#undef ARCH_X86

  93. //#define WORDS_BIGENDIAN

  94. #define DITHER1XBPP

  95. 

  96. #define FAST_BGR2YV12 // use 7 bit coefficients instead of 15 bit

  97. 

  98. #define RET 0xC3 //near return opcode for x86

  99. 

  100. #ifdef M_PI

  101. #define PI M_PI

  102. #else

  103. #define PI 3.14159265358979323846

  104. #endif

  105. 

  106. #define isSupportedIn(x)    (       \

  107.            (x)==PIX_FMT_YUV420P     \

  108.         || (x)==PIX_FMT_YUVA420P    \

  109.         || (x)==PIX_FMT_YUYV422     \

  110.         || (x)==PIX_FMT_UYVY422     \

  111.         || (x)==PIX_FMT_RGB32       \

  112.         || (x)==PIX_FMT_RGB32_1     \

  113.         || (x)==PIX_FMT_BGR24       \

  114.         || (x)==PIX_FMT_BGR565      \

  115.         || (x)==PIX_FMT_BGR555      \

  116.         || (x)==PIX_FMT_BGR32       \

  117.         || (x)==PIX_FMT_BGR32_1     \

  118.         || (x)==PIX_FMT_RGB24       \

  119.         || (x)==PIX_FMT_RGB565      \

  120.         || (x)==PIX_FMT_RGB555      \

  121.         || (x)==PIX_FMT_GRAY8       \

  122.         || (x)==PIX_FMT_YUV410P     \

  123.         || (x)==PIX_FMT_YUV440P     \

  124.         || (x)==PIX_FMT_GRAY16BE    \

  125.         || (x)==PIX_FMT_GRAY16LE    \

  126.         || (x)==PIX_FMT_YUV444P     \

  127.         || (x)==PIX_FMT_YUV422P     \

  128.         || (x)==PIX_FMT_YUV411P     \

  129.         || (x)==PIX_FMT_PAL8        \

  130.         || (x)==PIX_FMT_BGR8        \

  131.         || (x)==PIX_FMT_RGB8        \

  132.         || (x)==PIX_FMT_BGR4_BYTE   \

  133.         || (x)==PIX_FMT_RGB4_BYTE   \

  134.         || (x)==PIX_FMT_YUV440P     \

  135.         || (x)==PIX_FMT_MONOWHITE   \

  136.         || (x)==PIX_FMT_MONOBLACK   \

  137.         || (x)==PIX_FMT_YUV420PLE   \

  138.         || (x)==PIX_FMT_YUV422PLE   \

  139.         || (x)==PIX_FMT_YUV444PLE   \

  140.         || (x)==PIX_FMT_YUV420PBE   \

  141.         || (x)==PIX_FMT_YUV422PBE   \

  142.         || (x)==PIX_FMT_YUV444PBE   \

  143.     )

  144. #define isSupportedOut(x)   (       \

  145.            (x)==PIX_FMT_YUV420P     \

  146.         || (x)==PIX_FMT_YUVA420P    \

  147.         || (x)==PIX_FMT_YUYV422     \

  148.         || (x)==PIX_FMT_UYVY422     \

  149.         || (x)==PIX_FMT_YUV444P     \

  150.         || (x)==PIX_FMT_YUV422P     \

  151.         || (x)==PIX_FMT_YUV411P     \

  152.         || isRGB(x)                 \

  153.         || isBGR(x)                 \

  154.         || (x)==PIX_FMT_NV12        \

  155.         || (x)==PIX_FMT_NV21        \

  156.         || (x)==PIX_FMT_GRAY16BE    \

  157.         || (x)==PIX_FMT_GRAY16LE    \

  158.         || (x)==PIX_FMT_GRAY8       \

  159.         || (x)==PIX_FMT_YUV410P     \

  160.         || (x)==PIX_FMT_YUV440P     \

  161.         || (x)==PIX_FMT_YUV420PLE   \

  162.         || (x)==PIX_FMT_YUV422PLE   \

  163.         || (x)==PIX_FMT_YUV444PLE   \

  164.         || (x)==PIX_FMT_YUV420PBE   \

  165.         || (x)==PIX_FMT_YUV422PBE   \

  166.         || (x)==PIX_FMT_YUV444PBE   \

  167.     )

  168. #define isPacked(x)         (       \

  169.            (x)==PIX_FMT_PAL8        \

  170.         || (x)==PIX_FMT_YUYV422     \

  171.         || (x)==PIX_FMT_UYVY422     \

  172.         || isRGB(x)                 \

  173.         || isBGR(x)                 \

  174.     )

  175. #define usePal(x)           (       \

  176.            (x)==PIX_FMT_PAL8        \

  177.         || (x)==PIX_FMT_BGR4_BYTE   \

  178.         || (x)==PIX_FMT_RGB4_BYTE   \

  179.         || (x)==PIX_FMT_BGR8        \

  180.         || (x)==PIX_FMT_RGB8        \

  181.     )

  182. 

  183. #define RGB2YUV_SHIFT 15

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

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

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

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

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

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

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

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

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

  193. 

  194. extern const int32_t ff_yuv2rgb_coeffs[8][4];

  195. 

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

  197.     {0.7152, 0.0722, 0.2126, -0.386, 0.5, -0.115, -0.454, -0.046, 0.5},

  198.     {0.7152, 0.0722, 0.2126, -0.386, 0.5, -0.115, -0.454, -0.046, 0.5},

  199.     {0.587 , 0.114 , 0.299 , -0.331, 0.5, -0.169, -0.419, -0.081, 0.5},

  200.     {0.587 , 0.114 , 0.299 , -0.331, 0.5, -0.169, -0.419, -0.081, 0.5},

  201.     {0.59  , 0.11  , 0.30  , -0.331, 0.5, -0.169, -0.421, -0.079, 0.5}, //FCC

  202.     {0.587 , 0.114 , 0.299 , -0.331, 0.5, -0.169, -0.419, -0.081, 0.5},

  203.     {0.587 , 0.114 , 0.299 , -0.331, 0.5, -0.169, -0.419, -0.081, 0.5}, //SMPTE 170M

  204.     {0.701 , 0.087 , 0.212 , -0.384, 0.5  -0.116, -0.445, -0.055, 0.5}, //SMPTE 240M

  205. };

  206. 

  207. /*

  208. NOTES

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

  210. 

  211. TODO

  212. more intelligent misalignment avoidance for the horizontal scaler

  213. write special vertical cubic upscale version

  214. optimize C code (YV12 / minmax)

  215. add support for packed pixel YUV input & output

  216. add support for Y8 output

  217. optimize BGR24 & BGR32

  218. add BGR4 output support

  219. write special BGR->BGR scaler

  220. */

  221. 

  222. #if ARCH_X86 && CONFIG_GPL

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

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

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

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

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

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

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

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

  231. 

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

  233.         0x0103010301030103LL,

  234.         0x0200020002000200LL,};

  235. 

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

  237.         0x0602060206020602LL,

  238.         0x0004000400040004LL,};

  239. 

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

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

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

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

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

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

  246. 

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

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

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

  250. 

  251. #ifdef FAST_BGR2YV12

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

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

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

  255. #else

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

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

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

  259. #endif /* FAST_BGR2YV12 */

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

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

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

  263. 

  264. DECLARE_ASM_CONST(8, uint64_t, ff_bgr24toY1Coeff) = 0x0C88000040870C88ULL;

  265. DECLARE_ASM_CONST(8, uint64_t, ff_bgr24toY2Coeff) = 0x20DE4087000020DEULL;

  266. DECLARE_ASM_CONST(8, uint64_t, ff_rgb24toY1Coeff) = 0x20DE0000408720DEULL;

  267. DECLARE_ASM_CONST(8, uint64_t, ff_rgb24toY2Coeff) = 0x0C88408700000C88ULL;

  268. DECLARE_ASM_CONST(8, uint64_t, ff_bgr24toYOffset) = 0x0008400000084000ULL;

  269. 

  270. DECLARE_ASM_CONST(8, uint64_t, ff_bgr24toUV[2][4]) = {

  271.     {0x38380000DAC83838ULL, 0xECFFDAC80000ECFFULL, 0xF6E40000D0E3F6E4ULL, 0x3838D0E300003838ULL},

  272.     {0xECFF0000DAC8ECFFULL, 0x3838DAC800003838ULL, 0x38380000D0E33838ULL, 0xF6E4D0E30000F6E4ULL},

  273. };

  274. 

  275. DECLARE_ASM_CONST(8, uint64_t, ff_bgr24toUVOffset)= 0x0040400000404000ULL;

  276. 

  277. #endif /* ARCH_X86 && CONFIG_GPL */

  278. 

  279. // clipping helper table for C implementations:

  280. static unsigned char clip_table[768];

  281. 

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

  283. 

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

  285. {  1,   3,   1,   3,   1,   3,   1,   3, },

  286. {  2,   0,   2,   0,   2,   0,   2,   0, },

  287. };

  288. 

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

  290. {  6,   2,   6,   2,   6,   2,   6,   2, },

  291. {  0,   4,   0,   4,   0,   4,   0,   4, },

  292. };

  293. 

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

  295. { 17,   9,  23,  15,  16,   8,  22,  14, },

  296. {  5,  29,   3,  27,   4,  28,   2,  26, },

  297. { 21,  13,  19,  11,  20,  12,  18,  10, },

  298. {  0,  24,   6,  30,   1,  25,   7,  31, },

  299. { 16,   8,  22,  14,  17,   9,  23,  15, },

  300. {  4,  28,   2,  26,   5,  29,   3,  27, },

  301. { 20,  12,  18,  10,  21,  13,  19,  11, },

  302. {  1,  25,   7,  31,   0,  24,   6,  30, },

  303. };

  304. 

  305. #if 0

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

  307. {  0,  48,  12,  60,   3,  51,  15,  63, },

  308. { 32,  16,  44,  28,  35,  19,  47,  31, },

  309. {  8,  56,   4,  52,  11,  59,   7,  55, },

  310. { 40,  24,  36,  20,  43,  27,  39,  23, },

  311. {  2,  50,  14,  62,   1,  49,  13,  61, },

  312. { 34,  18,  46,  30,  33,  17,  45,  29, },

  313. { 10,  58,   6,  54,   9,  57,   5,  53, },

  314. { 42,  26,  38,  22,  41,  25,  37,  21, },

  315. };

  316. #endif

  317. 

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

  319. {  0,  55,  14,  68,   3,  58,  17,  72, },

  320. { 37,  18,  50,  32,  40,  22,  54,  35, },

  321. {  9,  64,   5,  59,  13,  67,   8,  63, },

  322. { 46,  27,  41,  23,  49,  31,  44,  26, },

  323. {  2,  57,  16,  71,   1,  56,  15,  70, },

  324. { 39,  21,  52,  34,  38,  19,  51,  33, },

  325. { 11,  66,   7,  62,  10,  65,   6,  60, },

  326. { 48,  30,  43,  25,  47,  29,  42,  24, },

  327. };

  328. 

  329. #if 0

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

  331. { 68,  36,  92,  60,  66,  34,  90,  58, },

  332. { 20, 116,  12, 108,  18, 114,  10, 106, },

  333. { 84,  52,  76,  44,  82,  50,  74,  42, },

  334. {  0,  96,  24, 120,   6, 102,  30, 126, },

  335. { 64,  32,  88,  56,  70,  38,  94,  62, },

  336. { 16, 112,   8, 104,  22, 118,  14, 110, },

  337. { 80,  48,  72,  40,  86,  54,  78,  46, },

  338. {  4, 100,  28, 124,   2,  98,  26, 122, },

  339. };

  340. #endif

  341. 

  342. #if 1

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

  344. {117,  62, 158, 103, 113,  58, 155, 100, },

  345. { 34, 199,  21, 186,  31, 196,  17, 182, },

  346. {144,  89, 131,  76, 141,  86, 127,  72, },

  347. {  0, 165,  41, 206,  10, 175,  52, 217, },

  348. {110,  55, 151,  96, 120,  65, 162, 107, },

  349. { 28, 193,  14, 179,  38, 203,  24, 189, },

  350. {138,  83, 124,  69, 148,  93, 134,  79, },

  351. {  7, 172,  48, 213,   3, 168,  45, 210, },

  352. };

  353. #elif 1

  354. // tries to correct a gamma of 1.5

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

  356. {  0, 143,  18, 200,   2, 156,  25, 215, },

  357. { 78,  28, 125,  64,  89,  36, 138,  74, },

  358. { 10, 180,   3, 161,  16, 195,   8, 175, },

  359. {109,  51,  93,  38, 121,  60, 105,  47, },

  360. {  1, 152,  23, 210,   0, 147,  20, 205, },

  361. { 85,  33, 134,  71,  81,  30, 130,  67, },

  362. { 14, 190,   6, 171,  12, 185,   5, 166, },

  363. {117,  57, 101,  44, 113,  54,  97,  41, },

  364. };

  365. #elif 1

  366. // tries to correct a gamma of 2.0

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

  368. {  0, 124,   8, 193,   0, 140,  12, 213, },

  369. { 55,  14, 104,  42,  66,  19, 119,  52, },

  370. {  3, 168,   1, 145,   6, 187,   3, 162, },

  371. { 86,  31,  70,  21,  99,  39,  82,  28, },

  372. {  0, 134,  11, 206,   0, 129,   9, 200, },

  373. { 62,  17, 114,  48,  58,  16, 109,  45, },

  374. {  5, 181,   2, 157,   4, 175,   1, 151, },

  375. { 95,  36,  78,  26,  90,  34,  74,  24, },

  376. };

  377. #else

  378. // tries to correct a gamma of 2.5

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

  380. {  0, 107,   3, 187,   0, 125,   6, 212, },

  381. { 39,   7,  86,  28,  49,  11, 102,  36, },

  382. {  1, 158,   0, 131,   3, 180,   1, 151, },

  383. { 68,  19,  52,  12,  81,  25,  64,  17, },

  384. {  0, 119,   5, 203,   0, 113,   4, 195, },

  385. { 45,   9,  96,  33,  42,   8,  91,  30, },

  386. {  2, 172,   1, 144,   2, 165,   0, 137, },

  387. { 77,  23,  60,  15,  72,  21,  56,  14, },

  388. };

  389. #endif

  390. 

  391. const char *sws_format_name(enum PixelFormat format)

  392. {

  393.     switch (format) {

  394.         case PIX_FMT_YUV420P:

  395.             return "yuv420p";

  396.         case PIX_FMT_YUVA420P:

  397.             return "yuva420p";

  398.         case PIX_FMT_YUYV422:

  399.             return "yuyv422";

  400.         case PIX_FMT_RGB24:

  401.             return "rgb24";

  402.         case PIX_FMT_BGR24:

  403.             return "bgr24";

  404.         case PIX_FMT_YUV422P:

  405.             return "yuv422p";

  406.         case PIX_FMT_YUV444P:

  407.             return "yuv444p";

  408.         case PIX_FMT_RGB32:

  409.             return "rgb32";

  410.         case PIX_FMT_YUV410P:

  411.             return "yuv410p";

  412.         case PIX_FMT_YUV411P:

  413.             return "yuv411p";

  414.         case PIX_FMT_RGB565:

  415.             return "rgb565";

  416.         case PIX_FMT_RGB555:

  417.             return "rgb555";

  418.         case PIX_FMT_GRAY16BE:

  419.             return "gray16be";

  420.         case PIX_FMT_GRAY16LE:

  421.             return "gray16le";

  422.         case PIX_FMT_GRAY8:

  423.             return "gray8";

  424.         case PIX_FMT_MONOWHITE:

  425.             return "mono white";

  426.         case PIX_FMT_MONOBLACK:

  427.             return "mono black";

  428.         case PIX_FMT_PAL8:

  429.             return "Palette";

  430.         case PIX_FMT_YUVJ420P:

  431.             return "yuvj420p";

  432.         case PIX_FMT_YUVJ422P:

  433.             return "yuvj422p";

  434.         case PIX_FMT_YUVJ444P:

  435.             return "yuvj444p";

  436.         case PIX_FMT_XVMC_MPEG2_MC:

  437.             return "xvmc_mpeg2_mc";

  438.         case PIX_FMT_XVMC_MPEG2_IDCT:

  439.             return "xvmc_mpeg2_idct";

  440.         case PIX_FMT_UYVY422:

  441.             return "uyvy422";

  442.         case PIX_FMT_UYYVYY411:

  443.             return "uyyvyy411";

  444.         case PIX_FMT_RGB32_1:

  445.             return "rgb32x";

  446.         case PIX_FMT_BGR32_1:

  447.             return "bgr32x";

  448.         case PIX_FMT_BGR32:

  449.             return "bgr32";

  450.         case PIX_FMT_BGR565:

  451.             return "bgr565";

  452.         case PIX_FMT_BGR555:

  453.             return "bgr555";

  454.         case PIX_FMT_BGR8:

  455.             return "bgr8";

  456.         case PIX_FMT_BGR4:

  457.             return "bgr4";

  458.         case PIX_FMT_BGR4_BYTE:

  459.             return "bgr4 byte";

  460.         case PIX_FMT_RGB8:

  461.             return "rgb8";

  462.         case PIX_FMT_RGB4:

  463.             return "rgb4";

  464.         case PIX_FMT_RGB4_BYTE:

  465.             return "rgb4 byte";

  466.         case PIX_FMT_RGB48BE:

  467.             return "rgb48be";

  468.         case PIX_FMT_RGB48LE:

  469.             return "rgb48le";

  470.         case PIX_FMT_NV12:

  471.             return "nv12";

  472.         case PIX_FMT_NV21:

  473.             return "nv21";

  474.         case PIX_FMT_YUV440P:

  475.             return "yuv440p";

  476.         case PIX_FMT_VDPAU_H264:

  477.             return "vdpau_h264";

  478.         case PIX_FMT_VDPAU_MPEG1:

  479.             return "vdpau_mpeg1";

  480.         case PIX_FMT_VDPAU_MPEG2:

  481.             return "vdpau_mpeg2";

  482.         case PIX_FMT_VDPAU_WMV3:

  483.             return "vdpau_wmv3";

  484.         case PIX_FMT_VDPAU_VC1:

  485.             return "vdpau_vc1";

  486.         case PIX_FMT_YUV420PLE:

  487.             return "yuv420ple";

  488.         case PIX_FMT_YUV422PLE:

  489.             return "yuv422ple";

  490.         case PIX_FMT_YUV444PLE:

  491.             return "yuv444ple";

  492.         case PIX_FMT_YUV420PBE:

  493.             return "yuv420pbe";

  494.         case PIX_FMT_YUV422PBE:

  495.             return "yuv422pbe";

  496.         case PIX_FMT_YUV444PBE:

  497.             return "yuv444pbe";

  498.         default:

  499.             return "Unknown format";

  500.     }

  501. }

  502. 

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

  504.                                const int16_t *chrFilter, const int16_t **chrSrc, int chrFilterSize,

  505.                                const int16_t **alpSrc, uint8_t *dest, uint8_t *uDest, uint8_t *vDest, uint8_t *aDest, int dstW, int chrDstW)

  506. {

  507.     //FIXME Optimize (just quickly written not optimized..)

  508.     int i;

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

  510.     {

  511.         int val=1<<18;

  512.         int j;

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

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

  515. 

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

  517.     }

  518. 

  519.     if (uDest)

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

  521.         {

  522.             int u=1<<18;

  523.             int v=1<<18;

  524.             int j;

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

  526.             {

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

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

  529.             }

  530. 

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

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

  533.         }

  534. 

  535.     if (CONFIG_SWSCALE_ALPHA && aDest)

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

  537.             int val=1<<18;

  538.             int j;

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

  540.                 val += alpSrc[j][i] * lumFilter[j];

  541. 

  542.             aDest[i]= av_clip_uint8(val>>19);

  543.         }

  544. 

  545. }

  546. 

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

  548.                                 const int16_t *chrFilter, const int16_t **chrSrc, int chrFilterSize,

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

  550. {

  551.     //FIXME Optimize (just quickly written not optimized..)

  552.     int i;

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

  554.     {

  555.         int val=1<<18;

  556.         int j;

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

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

  559. 

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

  561.     }

  562. 

  563.     if (!uDest)

  564.         return;

  565. 

  566.     if (dstFormat == PIX_FMT_NV12)

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

  568.         {

  569.             int u=1<<18;

  570.             int v=1<<18;

  571.             int j;

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

  573.             {

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

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

  576.             }

  577. 

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

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

  580.         }

  581.     else

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

  583.         {

  584.             int u=1<<18;

  585.             int v=1<<18;

  586.             int j;

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

  588.             {

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

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

  591.             }

  592. 

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

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

  595.         }

  596. }

  597. 

  598. #define YSCALE_YUV_2_PACKEDX_NOCLIP_C(type,alpha) \

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

  600.         int j;\

  601.         int Y1 = 1<<18;\

  602.         int Y2 = 1<<18;\

  603.         int U  = 1<<18;\

  604.         int V  = 1<<18;\

  605.         int av_unused A1, A2;\

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

  607.         const int i2= 2*i;\

  608.         \

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

  610.         {\

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

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

  613.         }\

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

  615.         {\

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

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

  618.         }\

  619.         Y1>>=19;\

  620.         Y2>>=19;\

  621.         U >>=19;\

  622.         V >>=19;\

  623.         if (alpha){\

  624.             A1 = 1<<18;\

  625.             A2 = 1<<18;\

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

  627.                 A1 += alpSrc[j][i2  ] * lumFilter[j];\

  628.                 A2 += alpSrc[j][i2+1] * lumFilter[j];\

  629.             }\

  630.             A1>>=19;\

  631.             A2>>=19;\

  632.         }\

  633. 

  634. #define YSCALE_YUV_2_PACKEDX_C(type,alpha) \

  635.         YSCALE_YUV_2_PACKEDX_NOCLIP_C(type,alpha)\

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

  637.         {\

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

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

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

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

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

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

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

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

  646.         }\

  647.         if (alpha && ((A1|A2)&256)){\

  648.             A1=av_clip_uint8(A1);\

  649.             A2=av_clip_uint8(A2);\

  650.         }

  651. 

  652. #define YSCALE_YUV_2_PACKEDX_FULL_C(rnd,alpha) \

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

  654.         int j;\

  655.         int Y = 0;\

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

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

  658.         int av_unused A;\

  659.         int R,G,B;\

  660.         \

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

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

  663.         }\

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

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

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

  667.         }\

  668.         Y >>=10;\

  669.         U >>=10;\

  670.         V >>=10;\

  671.         if (alpha){\

  672.             A = rnd;\

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

  674.                 A += alpSrc[j][i     ] * lumFilter[j];\

  675.             A >>=19;\

  676.             if (A&256)\

  677.                 A = av_clip_uint8(A);\

  678.         }\

  679. 

  680. #define YSCALE_YUV_2_RGBX_FULL_C(rnd,alpha) \

  681.     YSCALE_YUV_2_PACKEDX_FULL_C(rnd>>3,alpha)\

  682.         Y-= c->yuv2rgb_y_offset;\

  683.         Y*= c->yuv2rgb_y_coeff;\

  684.         Y+= rnd;\

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

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

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

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

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

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

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

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

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

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

  695.         }\

  696. 

  697. 

  698. #define YSCALE_YUV_2_GRAY16_C \

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

  700.         int j;\

  701.         int Y1 = 1<<18;\

  702.         int Y2 = 1<<18;\

  703.         int U  = 1<<18;\

  704.         int V  = 1<<18;\

  705.         \

  706.         const int i2= 2*i;\

  707.         \

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

  709.         {\

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

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

  712.         }\

  713.         Y1>>=11;\

  714.         Y2>>=11;\

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

  716.         {\

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

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

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

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

  721.         }

  722. 

  723. #define YSCALE_YUV_2_RGBX_C(type,alpha) \

  724.     YSCALE_YUV_2_PACKEDX_C(type,alpha)  /* FIXME fix tables so that clipping is not needed and then use _NOCLIP*/\

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

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

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

  728. 

  729. #define YSCALE_YUV_2_PACKED2_C(type,alpha)   \

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

  731.         const int i2= 2*i;       \

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

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

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

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

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

  737.         int av_unused A1, A2;                                         \

  738.         if (alpha){\

  739.             A1= (abuf0[i2  ]*yalpha1+abuf1[i2  ]*yalpha)>>19;         \

  740.             A2= (abuf0[i2+1]*yalpha1+abuf1[i2+1]*yalpha)>>19;         \

  741.         }\

  742. 

  743. #define YSCALE_YUV_2_GRAY16_2_C   \

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

  745.         const int i2= 2*i;       \

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

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

  748. 

  749. #define YSCALE_YUV_2_RGB2_C(type,alpha) \

  750.     YSCALE_YUV_2_PACKED2_C(type,alpha)\

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

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

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

  754. 

  755. #define YSCALE_YUV_2_PACKED1_C(type,alpha) \

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

  757.         const int i2= 2*i;\

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

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

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

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

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

  763.         int av_unused A1, A2;\

  764.         if (alpha){\

  765.             A1= abuf0[i2  ]>>7;\

  766.             A2= abuf0[i2+1]>>7;\

  767.         }\

  768. 

  769. #define YSCALE_YUV_2_GRAY16_1_C \

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

  771.         const int i2= 2*i;\

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

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

  774. 

  775. #define YSCALE_YUV_2_RGB1_C(type,alpha) \

  776.     YSCALE_YUV_2_PACKED1_C(type,alpha)\

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

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

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

  780. 

  781. #define YSCALE_YUV_2_PACKED1B_C(type,alpha) \

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

  783.         const int i2= 2*i;\

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

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

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

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

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

  789.         int av_unused A1, A2;\

  790.         if (alpha){\

  791.             A1= abuf0[i2  ]>>7;\

  792.             A2= abuf0[i2+1]>>7;\

  793.         }\

  794. 

  795. #define YSCALE_YUV_2_RGB1B_C(type,alpha) \

  796.     YSCALE_YUV_2_PACKED1B_C(type,alpha)\

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

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

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

  800. 

  801. #define YSCALE_YUV_2_MONO2_C \

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

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

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

  805.         int acc;\

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

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

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

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

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

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

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

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

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

  815.         dest++;\

  816.     }\

  817. 

  818. 

  819. #define YSCALE_YUV_2_MONOX_C \

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

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

  822.     int acc=0;\

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

  824.         int j;\

  825.         int Y1=1<<18;\

  826.         int Y2=1<<18;\

  827. \

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

  829.         {\

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

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

  832.         }\

  833.         Y1>>=19;\

  834.         Y2>>=19;\

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

  836.         {\

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

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

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

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

  841.         }\

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

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

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

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

  846.             dest++;\

  847.         }\

  848.     }

  849. 

  850. 

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

  852.     switch(c->dstFormat)\

  853.     {\

  854.     case PIX_FMT_RGBA:\

  855.     case PIX_FMT_BGRA:\

  856.         if (CONFIG_SMALL){\

  857.             int needAlpha = CONFIG_SWSCALE_ALPHA && c->alpPixBuf;\

  858.             func(uint32_t,needAlpha)\

  859.                 ((uint32_t*)dest)[i2+0]= r[Y1] + g[Y1] + b[Y1] + (needAlpha ? (A1<<24) : 0);\

  860.                 ((uint32_t*)dest)[i2+1]= r[Y2] + g[Y2] + b[Y2] + (needAlpha ? (A2<<24) : 0);\

  861.             }\

  862.         }else{\

  863.             if (CONFIG_SWSCALE_ALPHA && c->alpPixBuf){\

  864.                 func(uint32_t,1)\

  865.                     ((uint32_t*)dest)[i2+0]= r[Y1] + g[Y1] + b[Y1] + (A1<<24);\

  866.                     ((uint32_t*)dest)[i2+1]= r[Y2] + g[Y2] + b[Y2] + (A2<<24);\

  867.                 }\

  868.             }else{\

  869.                 func(uint32_t,0)\

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

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

  872.                 }\

  873.             }\

  874.         }\

  875.         break;\

  876.     case PIX_FMT_ARGB:\

  877.     case PIX_FMT_ABGR:\

  878.         if (CONFIG_SMALL){\

  879.             int needAlpha = CONFIG_SWSCALE_ALPHA && c->alpPixBuf;\

  880.             func(uint32_t,needAlpha)\

  881.                 ((uint32_t*)dest)[i2+0]= r[Y1] + g[Y1] + b[Y1] + (needAlpha ? A1 : 0);\

  882.                 ((uint32_t*)dest)[i2+1]= r[Y2] + g[Y2] + b[Y2] + (needAlpha ? A2 : 0);\

  883.             }\

  884.         }else{\

  885.             if (CONFIG_SWSCALE_ALPHA && c->alpPixBuf){\

  886.                 func(uint32_t,1)\

  887.                     ((uint32_t*)dest)[i2+0]= r[Y1] + g[Y1] + b[Y1] + A1;\

  888.                     ((uint32_t*)dest)[i2+1]= r[Y2] + g[Y2] + b[Y2] + A2;\

  889.                 }\

  890.             }else{\

  891.                 func(uint32_t,0)\

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

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

  894.                 }\

  895.             }\

  896.         }                \

  897.         break;\

  898.     case PIX_FMT_RGB24:\

  899.         func(uint8_t,0)\

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

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

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

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

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

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

  906.             dest+=6;\

  907.         }\

  908.         break;\

  909.     case PIX_FMT_BGR24:\

  910.         func(uint8_t,0)\

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

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

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

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

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

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

  917.             dest+=6;\

  918.         }\

  919.         break;\

  920.     case PIX_FMT_RGB565:\

  921.     case PIX_FMT_BGR565:\

  922.         {\

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

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

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

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

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

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

  929.             func(uint16_t,0)\

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

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

  932.             }\

  933.         }\

  934.         break;\

  935.     case PIX_FMT_RGB555:\

  936.     case PIX_FMT_BGR555:\

  937.         {\

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

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

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

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

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

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

  944.             func(uint16_t,0)\

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

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

  947.             }\

  948.         }\

  949.         break;\

  950.     case PIX_FMT_RGB8:\

  951.     case PIX_FMT_BGR8:\

  952.         {\

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

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

  955.             func(uint8_t,0)\

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

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

  958.             }\

  959.         }\

  960.         break;\

  961.     case PIX_FMT_RGB4:\

  962.     case PIX_FMT_BGR4:\

  963.         {\

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

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

  966.             func(uint8_t,0)\

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

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

  969.             }\

  970.         }\

  971.         break;\

  972.     case PIX_FMT_RGB4_BYTE:\

  973.     case PIX_FMT_BGR4_BYTE:\

  974.         {\

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

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

  977.             func(uint8_t,0)\

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

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

  980.             }\

  981.         }\

  982.         break;\

  983.     case PIX_FMT_MONOBLACK:\

  984.     case PIX_FMT_MONOWHITE:\

  985.         {\

  986.             func_monoblack\

  987.         }\

  988.         break;\

  989.     case PIX_FMT_YUYV422:\

  990.         func2\

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

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

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

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

  995.         }                \

  996.         break;\

  997.     case PIX_FMT_UYVY422:\

  998.         func2\

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

  1000.             ((uint8_t*)dest)[2*i2+1]= Y1;\

  1001.             ((uint8_t*)dest)[2*i2+2]= V;\

  1002.             ((uint8_t*)dest)[2*i2+3]= Y2;\

  1003.         }                \

  1004.         break;\

  1005.     case PIX_FMT_GRAY16BE:\

  1006.         func_g16\

  1007.             ((uint8_t*)dest)[2*i2+0]= Y1>>8;\

  1008.             ((uint8_t*)dest)[2*i2+1]= Y1;\

  1009.             ((uint8_t*)dest)[2*i2+2]= Y2>>8;\

  1010.             ((uint8_t*)dest)[2*i2+3]= Y2;\

  1011.         }                \

  1012.         break;\

  1013.     case PIX_FMT_GRAY16LE:\

  1014.         func_g16\

  1015.             ((uint8_t*)dest)[2*i2+0]= Y1;\

  1016.             ((uint8_t*)dest)[2*i2+1]= Y1>>8;\

  1017.             ((uint8_t*)dest)[2*i2+2]= Y2;\

  1018.             ((uint8_t*)dest)[2*i2+3]= Y2>>8;\

  1019.         }                \

  1020.         break;\

  1021.     }\

  1022. 

  1023. 

  1024. static inline void yuv2packedXinC(SwsContext *c, const int16_t *lumFilter, const int16_t **lumSrc, int lumFilterSize,

  1025.                                   const int16_t *chrFilter, const int16_t **chrSrc, int chrFilterSize,

  1026.                                   const int16_t **alpSrc, uint8_t *dest, int dstW, int y)

  1027. {

  1028.     int i;

  1029.     YSCALE_YUV_2_ANYRGB_C(YSCALE_YUV_2_RGBX_C, YSCALE_YUV_2_PACKEDX_C(void,0), YSCALE_YUV_2_GRAY16_C, YSCALE_YUV_2_MONOX_C)

  1030. }

  1031. 

  1032. static inline void yuv2rgbXinC_full(SwsContext *c, const int16_t *lumFilter, const int16_t **lumSrc, int lumFilterSize,

  1033.                                     const int16_t *chrFilter, const int16_t **chrSrc, int chrFilterSize,

  1034.                                     const int16_t **alpSrc, uint8_t *dest, int dstW, int y)

  1035. {

  1036.     int i;

  1037.     int step= fmt_depth(c->dstFormat)/8;

  1038.     int aidx= 3;

  1039. 

  1040.     switch(c->dstFormat){

  1041.     case PIX_FMT_ARGB:

  1042.         dest++;

  1043.         aidx= 0;

  1044.     case PIX_FMT_RGB24:

  1045.         aidx--;

  1046.     case PIX_FMT_RGBA:

  1047.         if (CONFIG_SMALL){

  1048.             int needAlpha = CONFIG_SWSCALE_ALPHA && c->alpPixBuf;

  1049.             YSCALE_YUV_2_RGBX_FULL_C(1<<21, needAlpha)

  1050.                 dest[aidx]= needAlpha ? A : 255;

  1051.                 dest[0]= R>>22;

  1052.                 dest[1]= G>>22;

  1053.                 dest[2]= B>>22;

  1054.                 dest+= step;

  1055.             }

  1056.         }else{

  1057.             if (CONFIG_SWSCALE_ALPHA && c->alpPixBuf){

  1058.                 YSCALE_YUV_2_RGBX_FULL_C(1<<21, 1)

  1059.                     dest[aidx]= A;

  1060.                     dest[0]= R>>22;

  1061.                     dest[1]= G>>22;

  1062.                     dest[2]= B>>22;

  1063.                     dest+= step;

  1064.                 }

  1065.             }else{

  1066.                 YSCALE_YUV_2_RGBX_FULL_C(1<<21, 0)

  1067.                     dest[aidx]= 255;

  1068.                     dest[0]= R>>22;

  1069.                     dest[1]= G>>22;

  1070.                     dest[2]= B>>22;

  1071.                     dest+= step;

  1072.                 }

  1073.             }

  1074.         }

  1075.         break;

  1076.     case PIX_FMT_ABGR:

  1077.         dest++;

  1078.         aidx= 0;

  1079.     case PIX_FMT_BGR24:

  1080.         aidx--;

  1081.     case PIX_FMT_BGRA:

  1082.         if (CONFIG_SMALL){

  1083.             int needAlpha = CONFIG_SWSCALE_ALPHA && c->alpPixBuf;

  1084.             YSCALE_YUV_2_RGBX_FULL_C(1<<21, needAlpha)

  1085.                 dest[aidx]= needAlpha ? A : 255;

  1086.                 dest[0]= B>>22;

  1087.                 dest[1]= G>>22;

  1088.                 dest[2]= R>>22;

  1089.                 dest+= step;

  1090.             }

  1091.         }else{

  1092.             if (CONFIG_SWSCALE_ALPHA && c->alpPixBuf){

  1093.                 YSCALE_YUV_2_RGBX_FULL_C(1<<21, 1)

  1094.                     dest[aidx]= A;

  1095.                     dest[0]= B>>22;

  1096.                     dest[1]= G>>22;

  1097.                     dest[2]= R>>22;

  1098.                     dest+= step;

  1099.                 }

  1100.             }else{

  1101.                 YSCALE_YUV_2_RGBX_FULL_C(1<<21, 0)

  1102.                     dest[aidx]= 255;

  1103.                     dest[0]= B>>22;

  1104.                     dest[1]= G>>22;

  1105.                     dest[2]= R>>22;

  1106.                     dest+= step;

  1107.                 }

  1108.             }

  1109.         }

  1110.         break;

  1111.     default:

  1112.         assert(0);

  1113.     }

  1114. }

  1115. 

  1116. static void fillPlane(uint8_t* plane, int stride, int width, int height, int y, uint8_t val){

  1117.     int i;

  1118.     uint8_t *ptr = plane + stride*y;

  1119.     for (i=0; i<height; i++){

  1120.         memset(ptr, val, width);

  1121.         ptr += stride;

  1122.     }

  1123. }

  1124. 

  1125. //Note: we have C, MMX, MMX2, 3DNOW versions, there is no 3DNOW+MMX2 one

  1126. //Plain C versions

  1127. #if !HAVE_MMX || CONFIG_RUNTIME_CPUDETECT || !CONFIG_GPL

  1128. #define COMPILE_C

  1129. #endif

  1130. 

  1131. #if ARCH_PPC

  1132. #if (HAVE_ALTIVEC || CONFIG_RUNTIME_CPUDETECT) && CONFIG_GPL

  1133. #undef COMPILE_C

  1134. #define COMPILE_ALTIVEC

  1135. #endif

  1136. #endif //ARCH_PPC

  1137. 

  1138. #if ARCH_X86

  1139. 

  1140. #if ((HAVE_MMX && !HAVE_AMD3DNOW && !HAVE_MMX2) || CONFIG_RUNTIME_CPUDETECT) && CONFIG_GPL

  1141. #define COMPILE_MMX

  1142. #endif

  1143. 

  1144. #if (HAVE_MMX2 || CONFIG_RUNTIME_CPUDETECT) && CONFIG_GPL

  1145. #define COMPILE_MMX2

  1146. #endif

  1147. 

  1148. #if ((HAVE_AMD3DNOW && !HAVE_MMX2) || CONFIG_RUNTIME_CPUDETECT) && CONFIG_GPL

  1149. #define COMPILE_3DNOW

  1150. #endif

  1151. #endif //ARCH_X86

  1152. 

  1153. #undef HAVE_MMX

  1154. #undef HAVE_MMX2

  1155. #undef HAVE_AMD3DNOW

  1156. #undef HAVE_ALTIVEC

  1157. #define HAVE_MMX 0

  1158. #define HAVE_MMX2 0

  1159. #define HAVE_AMD3DNOW 0

  1160. #define HAVE_ALTIVEC 0

  1161. 

  1162. #ifdef COMPILE_C

  1163. #define RENAME(a) a ## _C

  1164. #include "swscale_template.c"

  1165. #endif

  1166. 

  1167. #ifdef COMPILE_ALTIVEC

  1168. #undef RENAME

  1169. #undef HAVE_ALTIVEC

  1170. #define HAVE_ALTIVEC 1

  1171. #define RENAME(a) a ## _altivec

  1172. #include "swscale_template.c"

  1173. #endif

  1174. 

  1175. #if ARCH_X86

  1176. 

  1177. //MMX versions

  1178. #ifdef COMPILE_MMX

  1179. #undef RENAME

  1180. #undef HAVE_MMX

  1181. #undef HAVE_MMX2

  1182. #undef HAVE_AMD3DNOW

  1183. #define HAVE_MMX 1

  1184. #define HAVE_MMX2 0

  1185. #define HAVE_AMD3DNOW 0

  1186. #define RENAME(a) a ## _MMX

  1187. #include "swscale_template.c"

  1188. #endif

  1189. 

  1190. //MMX2 versions

  1191. #ifdef COMPILE_MMX2

  1192. #undef RENAME

  1193. #undef HAVE_MMX

  1194. #undef HAVE_MMX2

  1195. #undef HAVE_AMD3DNOW

  1196. #define HAVE_MMX 1

  1197. #define HAVE_MMX2 1

  1198. #define HAVE_AMD3DNOW 0

  1199. #define RENAME(a) a ## _MMX2

  1200. #include "swscale_template.c"

  1201. #endif

  1202. 

  1203. //3DNOW versions

  1204. #ifdef COMPILE_3DNOW

  1205. #undef RENAME

  1206. #undef HAVE_MMX

  1207. #undef HAVE_MMX2

  1208. #undef HAVE_AMD3DNOW

  1209. #define HAVE_MMX 1

  1210. #define HAVE_MMX2 0

  1211. #define HAVE_AMD3DNOW 1

  1212. #define RENAME(a) a ## _3DNow

  1213. #include "swscale_template.c"

  1214. #endif

  1215. 

  1216. #endif //ARCH_X86

  1217. 

  1218. // minor note: the HAVE_xyz are messed up after this line so don't use them

  1219. 

  1220. static double getSplineCoeff(double a, double b, double c, double d, double dist)

  1221. {

  1222. //    printf("%f %f %f %f %f\n", a,b,c,d,dist);

  1223.     if (dist<=1.0)      return ((d*dist + c)*dist + b)*dist +a;

  1224.     else                return getSplineCoeff(        0.0,

  1225.                                              b+ 2.0*c + 3.0*d,

  1226.                                                     c + 3.0*d,

  1227.                                             -b- 3.0*c - 6.0*d,

  1228.                                             dist-1.0);

  1229. }

  1230. 

  1231. static inline int initFilter(int16_t **outFilter, int16_t **filterPos, int *outFilterSize, int xInc,

  1232.                              int srcW, int dstW, int filterAlign, int one, int flags,

  1233.                              SwsVector *srcFilter, SwsVector *dstFilter, double param[2])

  1234. {

  1235.     int i;

  1236.     int filterSize;

  1237.     int filter2Size;

  1238.     int minFilterSize;

  1239.     int64_t *filter=NULL;

  1240.     int64_t *filter2=NULL;

  1241.     const int64_t fone= 1LL<<54;

  1242.     int ret= -1;

  1243. #if ARCH_X86

  1244.     if (flags & SWS_CPU_CAPS_MMX)

  1245.         __asm__ volatile("emms\n\t"::: "memory"); //FIXME this should not be required but it IS (even for non-MMX versions)

  1246. #endif

  1247. 

  1248.     // NOTE: the +1 is for the MMX scaler which reads over the end

  1249.     *filterPos = av_malloc((dstW+1)*sizeof(int16_t));

  1250. 

  1251.     if (FFABS(xInc - 0x10000) <10) // unscaled

  1252.     {

  1253.         int i;

  1254.         filterSize= 1;

  1255.         filter= av_mallocz(dstW*sizeof(*filter)*filterSize);

  1256. 

  1257.         for (i=0; i<dstW; i++)

  1258.         {

  1259.             filter[i*filterSize]= fone;

  1260.             (*filterPos)[i]=i;

  1261.         }

  1262. 

  1263.     }

  1264.     else if (flags&SWS_POINT) // lame looking point sampling mode

  1265.     {

  1266.         int i;

  1267.         int xDstInSrc;

  1268.         filterSize= 1;

  1269.         filter= av_malloc(dstW*sizeof(*filter)*filterSize);

  1270. 

  1271.         xDstInSrc= xInc/2 - 0x8000;

  1272.         for (i=0; i<dstW; i++)

  1273.         {

  1274.             int xx= (xDstInSrc - ((filterSize-1)<<15) + (1<<15))>>16;

  1275. 

  1276.             (*filterPos)[i]= xx;

  1277.             filter[i]= fone;

  1278.             xDstInSrc+= xInc;

  1279.         }

  1280.     }

  1281.     else if ((xInc <= (1<<16) && (flags&SWS_AREA)) || (flags&SWS_FAST_BILINEAR)) // bilinear upscale

  1282.     {

  1283.         int i;

  1284.         int xDstInSrc;

  1285.         if      (flags&SWS_BICUBIC) filterSize= 4;

  1286.         else if (flags&SWS_X      ) filterSize= 4;

  1287.         else                        filterSize= 2; // SWS_BILINEAR / SWS_AREA

  1288.         filter= av_malloc(dstW*sizeof(*filter)*filterSize);

  1289. 

  1290.         xDstInSrc= xInc/2 - 0x8000;

  1291.         for (i=0; i<dstW; i++)

  1292.         {

  1293.             int xx= (xDstInSrc - ((filterSize-1)<<15) + (1<<15))>>16;

  1294.             int j;

  1295. 

  1296.             (*filterPos)[i]= xx;

  1297.                 //bilinear upscale / linear interpolate / area averaging

  1298.                 for (j=0; j<filterSize; j++)

  1299.                 {

  1300.                     int64_t coeff= fone - FFABS((xx<<16) - xDstInSrc)*(fone>>16);

  1301.                     if (coeff<0) coeff=0;

  1302.                     filter[i*filterSize + j]= coeff;

  1303.                     xx++;

  1304.                 }

  1305.             xDstInSrc+= xInc;

  1306.         }

  1307.     }

  1308.     else

  1309.     {

  1310.         int xDstInSrc;

  1311.         int sizeFactor;

  1312. 

  1313.         if      (flags&SWS_BICUBIC)      sizeFactor=  4;

  1314.         else if (flags&SWS_X)            sizeFactor=  8;

  1315.         else if (flags&SWS_AREA)         sizeFactor=  1; //downscale only, for upscale it is bilinear

  1316.         else if (flags&SWS_GAUSS)        sizeFactor=  8;   // infinite ;)

  1317.         else if (flags&SWS_LANCZOS)      sizeFactor= param[0] != SWS_PARAM_DEFAULT ? ceil(2*param[0]) : 6;

  1318.         else if (flags&SWS_SINC)         sizeFactor= 20; // infinite ;)

  1319.         else if (flags&SWS_SPLINE)       sizeFactor= 20;  // infinite ;)

  1320.         else if (flags&SWS_BILINEAR)     sizeFactor=  2;

  1321.         else {

  1322.             sizeFactor= 0; //GCC warning killer

  1323.             assert(0);

  1324.         }

  1325. 

  1326.         if (xInc <= 1<<16)      filterSize= 1 + sizeFactor; // upscale

  1327.         else                    filterSize= 1 + (sizeFactor*srcW + dstW - 1)/ dstW;

  1328. 

  1329.         if (filterSize > srcW-2) filterSize=srcW-2;

  1330. 

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

  1332. 

  1333.         xDstInSrc= xInc - 0x10000;

  1334.         for (i=0; i<dstW; i++)

  1335.         {

  1336.             int xx= (xDstInSrc - ((filterSize-2)<<16)) / (1<<17);

  1337.             int j;

  1338.             (*filterPos)[i]= xx;

  1339.             for (j=0; j<filterSize; j++)

  1340.             {

  1341.                 int64_t d= ((int64_t)FFABS((xx<<17) - xDstInSrc))<<13;

  1342.                 double floatd;

  1343.                 int64_t coeff;

  1344. 

  1345.                 if (xInc > 1<<16)

  1346.                     d= d*dstW/srcW;

  1347.                 floatd= d * (1.0/(1<<30));

  1348. 

  1349.                 if (flags & SWS_BICUBIC)

  1350.                 {

  1351.                     int64_t B= (param[0] != SWS_PARAM_DEFAULT ? param[0] :   0) * (1<<24);

  1352.                     int64_t C= (param[1] != SWS_PARAM_DEFAULT ? param[1] : 0.6) * (1<<24);

  1353.                     int64_t dd = ( d*d)>>30;

  1354.                     int64_t ddd= (dd*d)>>30;

  1355. 

  1356.                     if      (d < 1LL<<30)

  1357.                         coeff = (12*(1<<24)-9*B-6*C)*ddd + (-18*(1<<24)+12*B+6*C)*dd + (6*(1<<24)-2*B)*(1<<30);

  1358.                     else if (d < 1LL<<31)

  1359.                         coeff = (-B-6*C)*ddd + (6*B+30*C)*dd + (-12*B-48*C)*d + (8*B+24*C)*(1<<30);

  1360.                     else

  1361.                         coeff=0.0;

  1362.                     coeff *= fone>>(30+24);

  1363.                 }

  1364. /*                else if (flags & SWS_X)

  1365.                 {

  1366.                     double p= param ? param*0.01 : 0.3;

  1367.                     coeff = d ? sin(d*PI)/(d*PI) : 1.0;

  1368.                     coeff*= pow(2.0, - p*d*d);

  1369.                 }*/

  1370.                 else if (flags & SWS_X)

  1371.                 {

  1372.                     double A= param[0] != SWS_PARAM_DEFAULT ? param[0] : 1.0;

  1373.                     double c;

  1374. 

  1375.                     if (floatd<1.0)

  1376.                         c = cos(floatd*PI);

  1377.                     else

  1378.                         c=-1.0;

  1379.                     if (c<0.0)      c= -pow(-c, A);

  1380.                     else            c=  pow( c, A);

  1381.                     coeff= (c*0.5 + 0.5)*fone;

  1382.                 }

  1383.                 else if (flags & SWS_AREA)

  1384.                 {

  1385.                     int64_t d2= d - (1<<29);

  1386.                     if      (d2*xInc < -(1LL<<(29+16))) coeff= 1.0 * (1LL<<(30+16));

  1387.                     else if (d2*xInc <  (1LL<<(29+16))) coeff= -d2*xInc + (1LL<<(29+16));

  1388.                     else coeff=0.0;

  1389.                     coeff *= fone>>(30+16);

  1390.                 }

  1391.                 else if (flags & SWS_GAUSS)

  1392.                 {

  1393.                     double p= param[0] != SWS_PARAM_DEFAULT ? param[0] : 3.0;

  1394.                     coeff = (pow(2.0, - p*floatd*floatd))*fone;

  1395.                 }

  1396.                 else if (flags & SWS_SINC)

  1397.                 {

  1398.                     coeff = (d ? sin(floatd*PI)/(floatd*PI) : 1.0)*fone;

  1399.                 }

  1400.                 else if (flags & SWS_LANCZOS)

  1401.                 {

  1402.                     double p= param[0] != SWS_PARAM_DEFAULT ? param[0] : 3.0;

  1403.                     coeff = (d ? sin(floatd*PI)*sin(floatd*PI/p)/(floatd*floatd*PI*PI/p) : 1.0)*fone;

  1404.                     if (floatd>p) coeff=0;

  1405.                 }

  1406.                 else if (flags & SWS_BILINEAR)

  1407.                 {

  1408.                     coeff= (1<<30) - d;

  1409.                     if (coeff<0) coeff=0;

  1410.                     coeff *= fone >> 30;

  1411.                 }

  1412.                 else if (flags & SWS_SPLINE)

  1413.                 {

  1414.                     double p=-2.196152422706632;

  1415.                     coeff = getSplineCoeff(1.0, 0.0, p, -p-1.0, floatd) * fone;

  1416.                 }

  1417.                 else {

  1418.                     coeff= 0.0; //GCC warning killer

  1419.                     assert(0);

  1420.                 }

  1421. 

  1422.                 filter[i*filterSize + j]= coeff;

  1423.                 xx++;

  1424.             }

  1425.             xDstInSrc+= 2*xInc;

  1426.         }

  1427.     }

  1428. 

  1429.     /* apply src & dst Filter to filter -> filter2

  1430.        av_free(filter);

  1431.     */

  1432.     assert(filterSize>0);

  1433.     filter2Size= filterSize;

  1434.     if (srcFilter) filter2Size+= srcFilter->length - 1;

  1435.     if (dstFilter) filter2Size+= dstFilter->length - 1;

  1436.     assert(filter2Size>0);

  1437.     filter2= av_mallocz(filter2Size*dstW*sizeof(*filter2));

  1438. 

  1439.     for (i=0; i<dstW; i++)

  1440.     {

  1441.         int j, k;

  1442. 

  1443.         if(srcFilter){

  1444.             for (k=0; k<srcFilter->length; k++){

  1445.                 for (j=0; j<filterSize; j++)

  1446.                     filter2[i*filter2Size + k + j] += srcFilter->coeff[k]*filter[i*filterSize + j];

  1447.             }

  1448.         }else{

  1449.             for (j=0; j<filterSize; j++)

  1450.                 filter2[i*filter2Size + j]= filter[i*filterSize + j];

  1451.         }

  1452.         //FIXME dstFilter

  1453. 

  1454.         (*filterPos)[i]+= (filterSize-1)/2 - (filter2Size-1)/2;

  1455.     }

  1456.     av_freep(&filter);

  1457. 

  1458.     /* try to reduce the filter-size (step1 find size and shift left) */

  1459.     // Assume it is near normalized (*0.5 or *2.0 is OK but * 0.001 is not).

  1460.     minFilterSize= 0;

  1461.     for (i=dstW-1; i>=0; i--)

  1462.     {

  1463.         int min= filter2Size;

  1464.         int j;

  1465.         int64_t cutOff=0.0;

  1466. 

  1467.         /* get rid off near zero elements on the left by shifting left */

  1468.         for (j=0; j<filter2Size; j++)

  1469.         {

  1470.             int k;

  1471.             cutOff += FFABS(filter2[i*filter2Size]);

  1472. 

  1473.             if (cutOff > SWS_MAX_REDUCE_CUTOFF*fone) break;

  1474. 

  1475.             /* preserve monotonicity because the core can't handle the filter otherwise */

  1476.             if (i<dstW-1 && (*filterPos)[i] >= (*filterPos)[i+1]) break;

  1477. 

  1478.             // move filter coefficients left

  1479.             for (k=1; k<filter2Size; k++)

  1480.                 filter2[i*filter2Size + k - 1]= filter2[i*filter2Size + k];

  1481.             filter2[i*filter2Size + k - 1]= 0;

  1482.             (*filterPos)[i]++;

  1483.         }

  1484. 

  1485.         cutOff=0;

  1486.         /* count near zeros on the right */

  1487.         for (j=filter2Size-1; j>0; j--)

  1488.         {

  1489.             cutOff += FFABS(filter2[i*filter2Size + j]);

  1490. 

  1491.             if (cutOff > SWS_MAX_REDUCE_CUTOFF*fone) break;

  1492.             min--;

  1493.         }

  1494. 

  1495.         if (min>minFilterSize) minFilterSize= min;

  1496.     }

  1497. 

  1498.     if (flags & SWS_CPU_CAPS_ALTIVEC) {

  1499.         // we can handle the special case 4,

  1500.         // so we don't want to go to the full 8

  1501.         if (minFilterSize < 5)

  1502.             filterAlign = 4;

  1503. 

  1504.         // We really don't want to waste our time

  1505.         // doing useless computation, so fall back on

  1506.         // the scalar C code for very small filters.

  1507.         // Vectorizing is worth it only if you have a

  1508.         // decent-sized vector.

  1509.         if (minFilterSize < 3)

  1510.             filterAlign = 1;

  1511.     }

  1512. 

  1513.     if (flags & SWS_CPU_CAPS_MMX) {

  1514.         // special case for unscaled vertical filtering

  1515.         if (minFilterSize == 1 && filterAlign == 2)

  1516.             filterAlign= 1;

  1517.     }

  1518. 

  1519.     assert(minFilterSize > 0);

  1520.     filterSize= (minFilterSize +(filterAlign-1)) & (~(filterAlign-1));

  1521.     assert(filterSize > 0);

  1522.     filter= av_malloc(filterSize*dstW*sizeof(*filter));

  1523.     if (filterSize >= MAX_FILTER_SIZE*16/((flags&SWS_ACCURATE_RND) ? APCK_SIZE : 16) || !filter)

  1524.         goto error;

  1525.     *outFilterSize= filterSize;

  1526. 

  1527.     if (flags&SWS_PRINT_INFO)

  1528.         av_log(NULL, AV_LOG_VERBOSE, "SwScaler: reducing / aligning filtersize %d -> %d\n", filter2Size, filterSize);

  1529.     /* try to reduce the filter-size (step2 reduce it) */

  1530.     for (i=0; i<dstW; i++)

  1531.     {

  1532.         int j;

  1533. 

  1534.         for (j=0; j<filterSize; j++)

  1535.         {

  1536.             if (j>=filter2Size) filter[i*filterSize + j]= 0;

  1537.             else               filter[i*filterSize + j]= filter2[i*filter2Size + j];

  1538.             if((flags & SWS_BITEXACT) && j>=minFilterSize)

  1539.                 filter[i*filterSize + j]= 0;

  1540.         }

  1541.     }

  1542. 

  1543. 

  1544.     //FIXME try to align filterPos if possible

  1545. 

  1546.     //fix borders

  1547.     for (i=0; i<dstW; i++)

  1548.     {

  1549.         int j;

  1550.         if ((*filterPos)[i] < 0)

  1551.         {

  1552.             // move filter coefficients left to compensate for filterPos

  1553.             for (j=1; j<filterSize; j++)

  1554.             {

  1555.                 int left= FFMAX(j + (*filterPos)[i], 0);

  1556.                 filter[i*filterSize + left] += filter[i*filterSize + j];

  1557.                 filter[i*filterSize + j]=0;

  1558.             }

  1559.             (*filterPos)[i]= 0;

  1560.         }

  1561. 

  1562.         if ((*filterPos)[i] + filterSize > srcW)

  1563.         {

  1564.             int shift= (*filterPos)[i] + filterSize - srcW;

  1565.             // move filter coefficients right to compensate for filterPos

  1566.             for (j=filterSize-2; j>=0; j--)

  1567.             {

  1568.                 int right= FFMIN(j + shift, filterSize-1);

  1569.                 filter[i*filterSize +right] += filter[i*filterSize +j];

  1570.                 filter[i*filterSize +j]=0;

  1571.             }

  1572.             (*filterPos)[i]= srcW - filterSize;

  1573.         }

  1574.     }

  1575. 

  1576.     // Note the +1 is for the MMX scaler which reads over the end

  1577.     /* align at 16 for AltiVec (needed by hScale_altivec_real) */

  1578.     *outFilter= av_mallocz(*outFilterSize*(dstW+1)*sizeof(int16_t));

  1579. 

  1580.     /* normalize & store in outFilter */

  1581.     for (i=0; i<dstW; i++)

  1582.     {

  1583.         int j;

  1584.         int64_t error=0;

  1585.         int64_t sum=0;

  1586. 

  1587.         for (j=0; j<filterSize; j++)

  1588.         {

  1589.             sum+= filter[i*filterSize + j];

  1590.         }

  1591.         sum= (sum + one/2)/ one;

  1592.         for (j=0; j<*outFilterSize; j++)

  1593.         {

  1594.             int64_t v= filter[i*filterSize + j] + error;

  1595.             int intV= ROUNDED_DIV(v, sum);

  1596.             (*outFilter)[i*(*outFilterSize) + j]= intV;

  1597.             error= v - intV*sum;

  1598.         }

  1599.     }

  1600. 

  1601.     (*filterPos)[dstW]= (*filterPos)[dstW-1]; // the MMX scaler will read over the end

  1602.     for (i=0; i<*outFilterSize; i++)

  1603.     {

  1604.         int j= dstW*(*outFilterSize);

  1605.         (*outFilter)[j + i]= (*outFilter)[j + i - (*outFilterSize)];

  1606.     }

  1607. 

  1608.     ret=0;

  1609. error:

  1610.     av_free(filter);

  1611.     av_free(filter2);

  1612.     return ret;

  1613. }

  1614. 

  1615. #ifdef COMPILE_MMX2

  1616. static void initMMX2HScaler(int dstW, int xInc, uint8_t *funnyCode, int16_t *filter, int32_t *filterPos, int numSplits)

  1617. {

  1618.     uint8_t *fragmentA;

  1619.     x86_reg imm8OfPShufW1A;

  1620.     x86_reg imm8OfPShufW2A;

  1621.     x86_reg fragmentLengthA;

  1622.     uint8_t *fragmentB;

  1623.     x86_reg imm8OfPShufW1B;

  1624.     x86_reg imm8OfPShufW2B;

  1625.     x86_reg fragmentLengthB;

  1626.     int fragmentPos;

  1627. 

  1628.     int xpos, i;

  1629. 

  1630.     // create an optimized horizontal scaling routine

  1631. 

  1632.     //code fragment

  1633. 

  1634.     __asm__ volatile(

  1635.         "jmp                         9f                 \n\t"

  1636.     // Begin

  1637.         "0:                                             \n\t"

  1638.         "movq    (%%"REG_d", %%"REG_a"), %%mm3          \n\t"

  1639.         "movd    (%%"REG_c", %%"REG_S"), %%mm0          \n\t"

  1640.         "movd   1(%%"REG_c", %%"REG_S"), %%mm1          \n\t"

  1641.         "punpcklbw                %%mm7, %%mm1          \n\t"

  1642.         "punpcklbw                %%mm7, %%mm0          \n\t"

  1643.         "pshufw                   $0xFF, %%mm1, %%mm1   \n\t"

  1644.         "1:                                             \n\t"

  1645.         "pshufw                   $0xFF, %%mm0, %%mm0   \n\t"

  1646.         "2:                                             \n\t"

  1647.         "psubw                    %%mm1, %%mm0          \n\t"

  1648.         "movl   8(%%"REG_b", %%"REG_a"), %%esi          \n\t"

  1649.         "pmullw                   %%mm3, %%mm0          \n\t"

  1650.         "psllw                       $7, %%mm1          \n\t"

  1651.         "paddw                    %%mm1, %%mm0          \n\t"

  1652. 

  1653.         "movq                     %%mm0, (%%"REG_D", %%"REG_a") \n\t"

  1654. 

  1655.         "add                         $8, %%"REG_a"      \n\t"

  1656.     // End

  1657.         "9:                                             \n\t"

  1658. //        "int $3                                         \n\t"

  1659.         "lea                 " LOCAL_MANGLE(0b) ", %0   \n\t"

  1660.         "lea                 " LOCAL_MANGLE(1b) ", %1   \n\t"

  1661.         "lea                 " LOCAL_MANGLE(2b) ", %2   \n\t"

  1662.         "dec                         %1                 \n\t"

  1663.         "dec                         %2                 \n\t"

  1664.         "sub                         %0, %1             \n\t"

  1665.         "sub                         %0, %2             \n\t"

  1666.         "lea                 " LOCAL_MANGLE(9b) ", %3   \n\t"

  1667.         "sub                         %0, %3             \n\t"

  1668. 

  1669. 

  1670.         :"=r" (fragmentA), "=r" (imm8OfPShufW1A), "=r" (imm8OfPShufW2A),

  1671.         "=r" (fragmentLengthA)

  1672.     );

  1673. 

  1674.     __asm__ volatile(

  1675.         "jmp                         9f                 \n\t"

  1676.     // Begin

  1677.         "0:                                             \n\t"

  1678.         "movq    (%%"REG_d", %%"REG_a"), %%mm3          \n\t"

  1679.         "movd    (%%"REG_c", %%"REG_S"), %%mm0          \n\t"

  1680.         "punpcklbw                %%mm7, %%mm0          \n\t"

  1681.         "pshufw                   $0xFF, %%mm0, %%mm1   \n\t"

  1682.         "1:                                             \n\t"

  1683.         "pshufw                   $0xFF, %%mm0, %%mm0   \n\t"

  1684.         "2:                                             \n\t"

  1685.         "psubw                    %%mm1, %%mm0          \n\t"

  1686.         "movl   8(%%"REG_b", %%"REG_a"), %%esi          \n\t"

  1687.         "pmullw                   %%mm3, %%mm0          \n\t"

  1688.         "psllw                       $7, %%mm1          \n\t"

  1689.         "paddw                    %%mm1, %%mm0          \n\t"

  1690. 

  1691.         "movq                     %%mm0, (%%"REG_D", %%"REG_a") \n\t"

  1692. 

  1693.         "add                         $8, %%"REG_a"      \n\t"

  1694.     // End

  1695.         "9:                                             \n\t"

  1696. //        "int                       $3                   \n\t"

  1697.         "lea                 " LOCAL_MANGLE(0b) ", %0   \n\t"

  1698.         "lea                 " LOCAL_MANGLE(1b) ", %1   \n\t"

  1699.         "lea                 " LOCAL_MANGLE(2b) ", %2   \n\t"

  1700.         "dec                         %1                 \n\t"

  1701.         "dec                         %2                 \n\t"

  1702.         "sub                         %0, %1             \n\t"

  1703.         "sub                         %0, %2             \n\t"

  1704.         "lea                 " LOCAL_MANGLE(9b) ", %3   \n\t"

  1705.         "sub                         %0, %3             \n\t"

  1706. 

  1707. 

  1708.         :"=r" (fragmentB), "=r" (imm8OfPShufW1B), "=r" (imm8OfPShufW2B),

  1709.         "=r" (fragmentLengthB)

  1710.     );

  1711. 

  1712.     xpos= 0; //lumXInc/2 - 0x8000; // difference between pixel centers

  1713.     fragmentPos=0;

  1714. 

  1715.     for (i=0; i<dstW/numSplits; i++)

  1716.     {

  1717.         int xx=xpos>>16;

  1718. 

  1719.         if ((i&3) == 0)

  1720.         {

  1721.             int a=0;

  1722.             int b=((xpos+xInc)>>16) - xx;

  1723.             int c=((xpos+xInc*2)>>16) - xx;

  1724.             int d=((xpos+xInc*3)>>16) - xx;

  1725. 

  1726.             filter[i  ] = (( xpos         & 0xFFFF) ^ 0xFFFF)>>9;

  1727.             filter[i+1] = (((xpos+xInc  ) & 0xFFFF) ^ 0xFFFF)>>9;

  1728.             filter[i+2] = (((xpos+xInc*2) & 0xFFFF) ^ 0xFFFF)>>9;

  1729.             filter[i+3] = (((xpos+xInc*3) & 0xFFFF) ^ 0xFFFF)>>9;

  1730.             filterPos[i/2]= xx;

  1731. 

  1732.             if (d+1<4)

  1733.             {

  1734.                 int maxShift= 3-(d+1);

  1735.                 int shift=0;

  1736. 

  1737.                 memcpy(funnyCode + fragmentPos, fragmentB, fragmentLengthB);

  1738. 

  1739.                 funnyCode[fragmentPos + imm8OfPShufW1B]=

  1740.                     (a+1) | ((b+1)<<2) | ((c+1)<<4) | ((d+1)<<6);

  1741.                 funnyCode[fragmentPos + imm8OfPShufW2B]=

  1742.                     a | (b<<2) | (c<<4) | (d<<6);

  1743. 

  1744.                 if (i+3>=dstW) shift=maxShift; //avoid overread

  1745.                 else if ((filterPos[i/2]&3) <= maxShift) shift=filterPos[i/2]&3; //Align

  1746. 

  1747.                 if (shift && i>=shift)

  1748.                 {

  1749.                     funnyCode[fragmentPos + imm8OfPShufW1B]+= 0x55*shift;

  1750.                     funnyCode[fragmentPos + imm8OfPShufW2B]+= 0x55*shift;

  1751.                     filterPos[i/2]-=shift;

  1752.                 }

  1753. 

  1754.                 fragmentPos+= fragmentLengthB;

  1755.             }

  1756.             else

  1757.             {

  1758.                 int maxShift= 3-d;

  1759.                 int shift=0;

  1760. 

  1761.                 memcpy(funnyCode + fragmentPos, fragmentA, fragmentLengthA);

  1762. 

  1763.                 funnyCode[fragmentPos + imm8OfPShufW1A]=

  1764.                 funnyCode[fragmentPos + imm8OfPShufW2A]=

  1765.                     a | (b<<2) | (c<<4) | (d<<6);

  1766. 

  1767.                 if (i+4>=dstW) shift=maxShift; //avoid overread

  1768.                 else if ((filterPos[i/2]&3) <= maxShift) shift=filterPos[i/2]&3; //partial align

  1769. 

  1770.                 if (shift && i>=shift)

  1771.                 {

  1772.                     funnyCode[fragmentPos + imm8OfPShufW1A]+= 0x55*shift;

  1773.                     funnyCode[fragmentPos + imm8OfPShufW2A]+= 0x55*shift;

  1774.                     filterPos[i/2]-=shift;

  1775.                 }

  1776. 

  1777.                 fragmentPos+= fragmentLengthA;

  1778.             }

  1779. 

  1780.             funnyCode[fragmentPos]= RET;

  1781.         }

  1782.         xpos+=xInc;

  1783.     }

  1784.     filterPos[((i/2)+1)&(~1)]= xpos>>16; // needed to jump to the next part

  1785. }

  1786. #endif /* COMPILE_MMX2 */

  1787. 

  1788. static void globalInit(void){

  1789.     // generating tables:

  1790.     int i;

  1791.     for (i=0; i<768; i++){

  1792.         int c= av_clip_uint8(i-256);

  1793.         clip_table[i]=c;

  1794.     }

  1795. }

  1796. 

  1797. static SwsFunc getSwsFunc(SwsContext *c)

  1798. {

  1799. #if CONFIG_RUNTIME_CPUDETECT && CONFIG_GPL

  1800.     int flags = c->flags;

  1801. 

  1802. #if ARCH_X86

  1803.     // ordered per speed fastest first

  1804.     if (flags & SWS_CPU_CAPS_MMX2) {

  1805.         sws_init_swScale_MMX2(c);

  1806.         return swScale_MMX2;

  1807.     } else if (flags & SWS_CPU_CAPS_3DNOW) {

  1808.         sws_init_swScale_3DNow(c);

  1809.         return swScale_3DNow;

  1810.     } else if (flags & SWS_CPU_CAPS_MMX) {

  1811.         sws_init_swScale_MMX(c);

  1812.         return swScale_MMX;

  1813.     } else {

  1814.         sws_init_swScale_C(c);

  1815.         return swScale_C;

  1816.     }

  1817. 

  1818. #else

  1819. #if ARCH_PPC

  1820.     if (flags & SWS_CPU_CAPS_ALTIVEC) {

  1821.         sws_init_swScale_altivec(c);

  1822.         return swScale_altivec;

  1823.     } else {

  1824.         sws_init_swScale_C(c);

  1825.         return swScale_C;

  1826.     }

  1827. #endif

  1828.     sws_init_swScale_C(c);

  1829.     return swScale_C;

  1830. #endif /* ARCH_X86 */

  1831. #else //CONFIG_RUNTIME_CPUDETECT

  1832. #if   HAVE_MMX2

  1833.     sws_init_swScale_MMX2(c);

  1834.     return swScale_MMX2;

  1835. #elif HAVE_AMD3DNOW

  1836.     sws_init_swScale_3DNow(c);

  1837.     return swScale_3DNow;

  1838. #elif HAVE_MMX

  1839.     sws_init_swScale_MMX(c);

  1840.     return swScale_MMX;

  1841. #elif HAVE_ALTIVEC

  1842.     sws_init_swScale_altivec(c);

  1843.     return swScale_altivec;

  1844. #else

  1845.     sws_init_swScale_C(c);

  1846.     return swScale_C;

  1847. #endif

  1848. #endif //!CONFIG_RUNTIME_CPUDETECT

  1849. }

  1850. 

  1851. static int PlanarToNV12Wrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1852.                                int srcSliceH, uint8_t* dstParam[], int dstStride[]){

  1853.     uint8_t *dst=dstParam[0] + dstStride[0]*srcSliceY;

  1854.     /* Copy Y plane */

  1855.     if (dstStride[0]==srcStride[0] && srcStride[0] > 0)

  1856.         memcpy(dst, src[0], srcSliceH*dstStride[0]);

  1857.     else

  1858.     {

  1859.         int i;

  1860.         const uint8_t *srcPtr= src[0];

  1861.         uint8_t *dstPtr= dst;

  1862.         for (i=0; i<srcSliceH; i++)

  1863.         {

  1864.             memcpy(dstPtr, srcPtr, c->srcW);

  1865.             srcPtr+= srcStride[0];

  1866.             dstPtr+= dstStride[0];

  1867.         }

  1868.     }

  1869.     dst = dstParam[1] + dstStride[1]*srcSliceY/2;

  1870.     if (c->dstFormat == PIX_FMT_NV12)

  1871.         interleaveBytes(src[1], src[2], dst, c->srcW/2, srcSliceH/2, srcStride[1], srcStride[2], dstStride[0]);

  1872.     else

  1873.         interleaveBytes(src[2], src[1], dst, c->srcW/2, srcSliceH/2, srcStride[2], srcStride[1], dstStride[0]);

  1874. 

  1875.     return srcSliceH;

  1876. }

  1877. 

  1878. static int PlanarToYuy2Wrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1879.                                int srcSliceH, uint8_t* dstParam[], int dstStride[]){

  1880.     uint8_t *dst=dstParam[0] + dstStride[0]*srcSliceY;

  1881. 

  1882.     yv12toyuy2(src[0], src[1], src[2], dst, c->srcW, srcSliceH, srcStride[0], srcStride[1], dstStride[0]);

  1883. 

  1884.     return srcSliceH;

  1885. }

  1886. 

  1887. static int PlanarToUyvyWrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1888.                                int srcSliceH, uint8_t* dstParam[], int dstStride[]){

  1889.     uint8_t *dst=dstParam[0] + dstStride[0]*srcSliceY;

  1890. 

  1891.     yv12touyvy(src[0], src[1], src[2], dst, c->srcW, srcSliceH, srcStride[0], srcStride[1], dstStride[0]);

  1892. 

  1893.     return srcSliceH;

  1894. }

  1895. 

  1896. static int YUV422PToYuy2Wrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1897.                                 int srcSliceH, uint8_t* dstParam[], int dstStride[]){

  1898.     uint8_t *dst=dstParam[0] + dstStride[0]*srcSliceY;

  1899. 

  1900.     yuv422ptoyuy2(src[0],src[1],src[2],dst,c->srcW,srcSliceH,srcStride[0],srcStride[1],dstStride[0]);

  1901. 

  1902.     return srcSliceH;

  1903. }

  1904. 

  1905. static int YUV422PToUyvyWrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1906.                                 int srcSliceH, uint8_t* dstParam[], int dstStride[]){

  1907.     uint8_t *dst=dstParam[0] + dstStride[0]*srcSliceY;

  1908. 

  1909.     yuv422ptouyvy(src[0],src[1],src[2],dst,c->srcW,srcSliceH,srcStride[0],srcStride[1],dstStride[0]);

  1910. 

  1911.     return srcSliceH;

  1912. }

  1913. 

  1914. static int YUYV2YUV420Wrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1915.                                int srcSliceH, uint8_t* dstParam[], int dstStride[]){

  1916.     uint8_t *ydst=dstParam[0] + dstStride[0]*srcSliceY;

  1917.     uint8_t *udst=dstParam[1] + dstStride[1]*srcSliceY/2;

  1918.     uint8_t *vdst=dstParam[2] + dstStride[2]*srcSliceY/2;

  1919. 

  1920.     yuyvtoyuv420(ydst, udst, vdst, src[0], c->srcW, srcSliceH, dstStride[0], dstStride[1], srcStride[0]);

  1921. 

  1922.     if (dstParam[3])

  1923.         fillPlane(dstParam[3], dstStride[3], c->srcW, srcSliceH, srcSliceY, 255);

  1924. 

  1925.     return srcSliceH;

  1926. }

  1927. 

  1928. static int YUYV2YUV422Wrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1929.                                int srcSliceH, uint8_t* dstParam[], int dstStride[]){

  1930.     uint8_t *ydst=dstParam[0] + dstStride[0]*srcSliceY;

  1931.     uint8_t *udst=dstParam[1] + dstStride[1]*srcSliceY;

  1932.     uint8_t *vdst=dstParam[2] + dstStride[2]*srcSliceY;

  1933. 

  1934.     yuyvtoyuv422(ydst, udst, vdst, src[0], c->srcW, srcSliceH, dstStride[0], dstStride[1], srcStride[0]);

  1935. 

  1936.     return srcSliceH;

  1937. }

  1938. 

  1939. static int UYVY2YUV420Wrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1940.                                int srcSliceH, uint8_t* dstParam[], int dstStride[]){

  1941.     uint8_t *ydst=dstParam[0] + dstStride[0]*srcSliceY;

  1942.     uint8_t *udst=dstParam[1] + dstStride[1]*srcSliceY/2;

  1943.     uint8_t *vdst=dstParam[2] + dstStride[2]*srcSliceY/2;

  1944. 

  1945.     uyvytoyuv420(ydst, udst, vdst, src[0], c->srcW, srcSliceH, dstStride[0], dstStride[1], srcStride[0]);

  1946. 

  1947.     if (dstParam[3])

  1948.         fillPlane(dstParam[3], dstStride[3], c->srcW, srcSliceH, srcSliceY, 255);

  1949. 

  1950.     return srcSliceH;

  1951. }

  1952. 

  1953. static int UYVY2YUV422Wrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1954.                                int srcSliceH, uint8_t* dstParam[], int dstStride[]){

  1955.     uint8_t *ydst=dstParam[0] + dstStride[0]*srcSliceY;

  1956.     uint8_t *udst=dstParam[1] + dstStride[1]*srcSliceY;

  1957.     uint8_t *vdst=dstParam[2] + dstStride[2]*srcSliceY;

  1958. 

  1959.     uyvytoyuv422(ydst, udst, vdst, src[0], c->srcW, srcSliceH, dstStride[0], dstStride[1], srcStride[0]);

  1960. 

  1961.     return srcSliceH;

  1962. }

  1963. 

  1964. static int pal2rgbWrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1965.                           int srcSliceH, uint8_t* dst[], int dstStride[]){

  1966.     const enum PixelFormat srcFormat= c->srcFormat;

  1967.     const enum PixelFormat dstFormat= c->dstFormat;

  1968.     void (*conv)(const uint8_t *src, uint8_t *dst, long num_pixels,

  1969.                  const uint8_t *palette)=NULL;

  1970.     int i;

  1971.     uint8_t *dstPtr= dst[0] + dstStride[0]*srcSliceY;

  1972.     uint8_t *srcPtr= src[0];

  1973. 

  1974.     if (!usePal(srcFormat))

  1975.         av_log(c, AV_LOG_ERROR, "internal error %s -> %s converter\n",

  1976.                sws_format_name(srcFormat), sws_format_name(dstFormat));

  1977. 

  1978.     switch(dstFormat){

  1979.     case PIX_FMT_RGB32  : conv = palette8topacked32; break;

  1980.     case PIX_FMT_BGR32  : conv = palette8topacked32; break;

  1981.     case PIX_FMT_BGR32_1: conv = palette8topacked32; break;

  1982.     case PIX_FMT_RGB32_1: conv = palette8topacked32; break;

  1983.     case PIX_FMT_RGB24  : conv = palette8topacked24; break;

  1984.     case PIX_FMT_BGR24  : conv = palette8topacked24; break;

  1985.     default: av_log(c, AV_LOG_ERROR, "internal error %s -> %s converter\n",

  1986.                     sws_format_name(srcFormat), sws_format_name(dstFormat)); break;

  1987.     }

  1988. 

  1989. 

  1990.     for (i=0; i<srcSliceH; i++) {

  1991.         conv(srcPtr, dstPtr, c->srcW, (uint8_t *) c->pal_rgb);

  1992.         srcPtr+= srcStride[0];

  1993.         dstPtr+= dstStride[0];

  1994.     }

  1995. 

  1996.     return srcSliceH;

  1997. }

  1998. 

  1999. /* {RGB,BGR}{15,16,24,32,32_1} -> {RGB,BGR}{15,16,24,32} */

  2000. static int rgb2rgbWrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  2001.                           int srcSliceH, uint8_t* dst[], int dstStride[]){

  2002.     const enum PixelFormat srcFormat= c->srcFormat;

  2003.     const enum PixelFormat dstFormat= c->dstFormat;

  2004.     const int srcBpp= (fmt_depth(srcFormat) + 7) >> 3;

  2005.     const int dstBpp= (fmt_depth(dstFormat) + 7) >> 3;

  2006.     const int srcId= fmt_depth(srcFormat) >> 2; /* 1:0, 4:1, 8:2, 15:3, 16:4, 24:6, 32:8 */

  2007.     const int dstId= fmt_depth(dstFormat) >> 2;

  2008.     void (*conv)(const uint8_t *src, uint8_t *dst, long src_size)=NULL;

  2009. 

  2010.     /* BGR -> BGR */

  2011.     if (  (isBGR(srcFormat) && isBGR(dstFormat))

  2012.        || (isRGB(srcFormat) && isRGB(dstFormat))){

  2013.         switch(srcId | (dstId<<4)){

  2014.         case 0x34: conv= rgb16to15; break;

  2015.         case 0x36: conv= rgb24to15; break;

  2016.         case 0x38: conv= rgb32to15; break;

  2017.         case 0x43: conv= rgb15to16; break;

  2018.         case 0x46: conv= rgb24to16; break;

  2019.         case 0x48: conv= rgb32to16; break;

  2020.         case 0x63: conv= rgb15to24; break;

  2021.         case 0x64: conv= rgb16to24; break;

  2022.         case 0x68: conv= rgb32to24; break;

  2023.         case 0x83: conv= rgb15to32; break;

  2024.         case 0x84: conv= rgb16to32; break;

  2025.         case 0x86: conv= rgb24to32; break;

  2026.         default: av_log(c, AV_LOG_ERROR, "internal error %s -> %s converter\n",

  2027.                         sws_format_name(srcFormat), sws_format_name(dstFormat)); break;

  2028.         }

  2029.     }else if (  (isBGR(srcFormat) && isRGB(dstFormat))

  2030.              || (isRGB(srcFormat) && isBGR(dstFormat))){

  2031.         switch(srcId | (dstId<<4)){

  2032.         case 0x33: conv= rgb15tobgr15; break;

  2033.         case 0x34: conv= rgb16tobgr15; break;

  2034.         case 0x36: conv= rgb24tobgr15; break;

  2035.         case 0x38: conv= rgb32tobgr15; break;

  2036.         case 0x43: conv= rgb15tobgr16; break;

  2037.         case 0x44: conv= rgb16tobgr16; break;

  2038.         case 0x46: conv= rgb24tobgr16; break;

  2039.         case 0x48: conv= rgb32tobgr16; break;

  2040.         case 0x63: conv= rgb15tobgr24; break;

  2041.         case 0x64: conv= rgb16tobgr24; break;

  2042.         case 0x66: conv= rgb24tobgr24; break;

  2043.         case 0x68: conv= rgb32tobgr24; break;

  2044.         case 0x83: conv= rgb15tobgr32; break;

  2045.         case 0x84: conv= rgb16tobgr32; break;

  2046.         case 0x86: conv= rgb24tobgr32; break;

  2047.         case 0x88: conv= rgb32tobgr32; break;

  2048.         default: av_log(c, AV_LOG_ERROR, "internal error %s -> %s converter\n",

  2049.                         sws_format_name(srcFormat), sws_format_name(dstFormat)); break;

  2050.         }

  2051.     }else{

  2052.         av_log(c, AV_LOG_ERROR, "internal error %s -> %s converter\n",

  2053.                sws_format_name(srcFormat), sws_format_name(dstFormat));

  2054.     }

  2055. 

  2056.     if(conv)

  2057.     {

  2058.         uint8_t *srcPtr= src[0];

  2059.         if(srcFormat == PIX_FMT_RGB32_1 || srcFormat == PIX_FMT_BGR32_1)

  2060.             srcPtr += ALT32_CORR;

  2061. 

  2062.         if (dstStride[0]*srcBpp == srcStride[0]*dstBpp && srcStride[0] > 0)

  2063.             conv(srcPtr, dst[0] + dstStride[0]*srcSliceY, srcSliceH*srcStride[0]);

  2064.         else

  2065.         {

  2066.             int i;

  2067.             uint8_t *dstPtr= dst[0] + dstStride[0]*srcSliceY;

  2068. 

  2069.             for (i=0; i<srcSliceH; i++)

  2070.             {

  2071.                 conv(srcPtr, dstPtr, c->srcW*srcBpp);

  2072.                 srcPtr+= srcStride[0];

  2073.                 dstPtr+= dstStride[0];

  2074.             }

  2075.         }

  2076.     }

  2077.     return srcSliceH;

  2078. }

  2079. 

  2080. static int bgr24toyv12Wrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  2081.                               int srcSliceH, uint8_t* dst[], int dstStride[]){

  2082. 

  2083.     rgb24toyv12(

  2084.         src[0],

  2085.         dst[0]+ srcSliceY    *dstStride[0],

  2086.         dst[1]+(srcSliceY>>1)*dstStride[1],

  2087.         dst[2]+(srcSliceY>>1)*dstStride[2],

  2088.         c->srcW, srcSliceH,

  2089.         dstStride[0], dstStride[1], srcStride[0]);

  2090.     if (dst[3])

  2091.         fillPlane(dst[3], dstStride[3], c->srcW, srcSliceH, srcSliceY, 255);

  2092.     return srcSliceH;

  2093. }

  2094. 

  2095. static int yvu9toyv12Wrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  2096.                              int srcSliceH, uint8_t* dst[], int dstStride[]){

  2097.     int i;

  2098. 

  2099.     /* copy Y */

  2100.     if (srcStride[0]==dstStride[0] && srcStride[0] > 0)

  2101.         memcpy(dst[0]+ srcSliceY*dstStride[0], src[0], srcStride[0]*srcSliceH);

  2102.     else{

  2103.         uint8_t *srcPtr= src[0];

  2104.         uint8_t *dstPtr= dst[0] + dstStride[0]*srcSliceY;

  2105. 

  2106.         for (i=0; i<srcSliceH; i++)

  2107.         {

  2108.             memcpy(dstPtr, srcPtr, c->srcW);

  2109.             srcPtr+= srcStride[0];

  2110.             dstPtr+= dstStride[0];

  2111.         }

  2112.     }

  2113. 

  2114.     if (c->dstFormat==PIX_FMT_YUV420P || c->dstFormat==PIX_FMT_YUVA420P){

  2115.         planar2x(src[1], dst[1] + dstStride[1]*(srcSliceY >> 1), c->chrSrcW,

  2116.                  srcSliceH >> 2, srcStride[1], dstStride[1]);

  2117.         planar2x(src[2], dst[2] + dstStride[2]*(srcSliceY >> 1), c->chrSrcW,

  2118.                  srcSliceH >> 2, srcStride[2], dstStride[2]);

  2119.     }else{

  2120.         planar2x(src[1], dst[2] + dstStride[2]*(srcSliceY >> 1), c->chrSrcW,

  2121.                  srcSliceH >> 2, srcStride[1], dstStride[2]);

  2122.         planar2x(src[2], dst[1] + dstStride[1]*(srcSliceY >> 1), c->chrSrcW,

  2123.                  srcSliceH >> 2, srcStride[2], dstStride[1]);

  2124.     }

  2125.     if (dst[3])

  2126.         fillPlane(dst[3], dstStride[3], c->srcW, srcSliceH, srcSliceY, 255);

  2127.     return srcSliceH;

  2128. }

  2129. 

  2130. /* unscaled copy like stuff (assumes nearly identical formats) */

  2131. static int packedCopy(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  2132.                       int srcSliceH, uint8_t* dst[], int dstStride[])

  2133. {

  2134.     if (dstStride[0]==srcStride[0] && srcStride[0] > 0)

  2135.         memcpy(dst[0] + dstStride[0]*srcSliceY, src[0], srcSliceH*dstStride[0]);

  2136.     else

  2137.     {

  2138.         int i;

  2139.         uint8_t *srcPtr= src[0];

  2140.         uint8_t *dstPtr= dst[0] + dstStride[0]*srcSliceY;

  2141.         int length=0;

  2142. 

  2143.         /* universal length finder */

  2144.         while(length+c->srcW <= FFABS(dstStride[0])

  2145.            && length+c->srcW <= FFABS(srcStride[0])) length+= c->srcW;

  2146.         assert(length!=0);

  2147. 

  2148.         for (i=0; i<srcSliceH; i++)

  2149.         {

  2150.             memcpy(dstPtr, srcPtr, length);

  2151.             srcPtr+= srcStride[0];

  2152.             dstPtr+= dstStride[0];

  2153.         }

  2154.     }

  2155.     return srcSliceH;

  2156. }

  2157. 

  2158. static int planarCopy(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  2159.                       int srcSliceH, uint8_t* dst[], int dstStride[])

  2160. {

  2161.     int plane, i, j;

  2162.     for (plane=0; plane<4; plane++)

  2163.     {

  2164.         int length= (plane==0 || plane==3) ? c->srcW  : -((-c->srcW  )>>c->chrDstHSubSample);

  2165.         int y=      (plane==0 || plane==3) ? srcSliceY: -((-srcSliceY)>>c->chrDstVSubSample);

  2166.         int height= (plane==0 || plane==3) ? srcSliceH: -((-srcSliceH)>>c->chrDstVSubSample);

  2167.         uint8_t *srcPtr= src[plane];

  2168.         uint8_t *dstPtr= dst[plane] + dstStride[plane]*y;

  2169. 

  2170.         if (!dst[plane]) continue;

  2171.         // ignore palette for GRAY8

  2172.         if (plane == 1 && !dst[2]) continue;

  2173.         if (!src[plane] || (plane == 1 && !src[2])){

  2174.             if(is16BPS(c->dstFormat))

  2175.                 length*=2;

  2176.             fillPlane(dst[plane], dstStride[plane], length, height, y, (plane==3) ? 255 : 128);

  2177.         }else

  2178.         {

  2179.             if(is16BPS(c->srcFormat) && !is16BPS(c->dstFormat)){

  2180.                 if (!isBE(c->srcFormat)) srcPtr++;

  2181.                 for (i=0; i<height; i++){

  2182.                     for (j=0; j<length; j++) dstPtr[j] = srcPtr[j<<1];

  2183.                     srcPtr+= srcStride[plane];

  2184.                     dstPtr+= dstStride[plane];

  2185.                 }

  2186.             }else if(!is16BPS(c->srcFormat) && is16BPS(c->dstFormat)){

  2187.                 for (i=0; i<height; i++){

  2188.                     for (j=0; j<length; j++){

  2189.                         dstPtr[ j<<1   ] = srcPtr[j];

  2190.                         dstPtr[(j<<1)+1] = srcPtr[j];

  2191.                     }

  2192.                     srcPtr+= srcStride[plane];

  2193.                     dstPtr+= dstStride[plane];

  2194.                 }

  2195.             }else if(is16BPS(c->srcFormat) && is16BPS(c->dstFormat)

  2196.                   && isBE(c->srcFormat) != isBE(c->dstFormat)){

  2197. 

  2198.                 for (i=0; i<height; i++){

  2199.                     for (j=0; j<length; j++)

  2200.                         ((uint16_t*)dstPtr)[j] = bswap_16(((uint16_t*)srcPtr)[j]);

  2201.                     srcPtr+= srcStride[plane];

  2202.                     dstPtr+= dstStride[plane];

  2203.                 }

  2204.             } else if (dstStride[plane]==srcStride[plane] && srcStride[plane] > 0)

  2205.                 memcpy(dst[plane] + dstStride[plane]*y, src[plane], height*dstStride[plane]);

  2206.             else

  2207.             {

  2208.                 if(is16BPS(c->srcFormat) && is16BPS(c->dstFormat))

  2209.                     length*=2;

  2210.                 for (i=0; i<height; i++)

  2211.                 {

  2212.                     memcpy(dstPtr, srcPtr, length);

  2213.                     srcPtr+= srcStride[plane];

  2214.                     dstPtr+= dstStride[plane];

  2215.                 }

  2216.             }

  2217.         }

  2218.     }

  2219.     return srcSliceH;

  2220. }

  2221. 

  2222. 

  2223. static void getSubSampleFactors(int *h, int *v, int format){

  2224.     switch(format){

  2225.     case PIX_FMT_UYVY422:

  2226.     case PIX_FMT_YUYV422:

  2227.         *h=1;

  2228.         *v=0;

  2229.         break;

  2230.     case PIX_FMT_YUV420P:

  2231.     case PIX_FMT_YUV420PLE:

  2232.     case PIX_FMT_YUV420PBE:

  2233.     case PIX_FMT_YUVA420P:

  2234.     case PIX_FMT_GRAY16BE:

  2235.     case PIX_FMT_GRAY16LE:

  2236.     case PIX_FMT_GRAY8: //FIXME remove after different subsamplings are fully implemented

  2237.     case PIX_FMT_NV12:

  2238.     case PIX_FMT_NV21:

  2239.         *h=1;

  2240.         *v=1;

  2241.         break;

  2242.     case PIX_FMT_YUV440P:

  2243.         *h=0;

  2244.         *v=1;

  2245.         break;

  2246.     case PIX_FMT_YUV410P:

  2247.         *h=2;

  2248.         *v=2;

  2249.         break;

  2250.     case PIX_FMT_YUV444P:

  2251.     case PIX_FMT_YUV444PLE:

  2252.     case PIX_FMT_YUV444PBE:

  2253.         *h=0;

  2254.         *v=0;

  2255.         break;

  2256.     case PIX_FMT_YUV422P:

  2257.     case PIX_FMT_YUV422PLE:

  2258.     case PIX_FMT_YUV422PBE:

  2259.         *h=1;

  2260.         *v=0;

  2261.         break;

  2262.     case PIX_FMT_YUV411P:

  2263.         *h=2;

  2264.         *v=0;

  2265.         break;

  2266.     default:

  2267.         *h=0;

  2268.         *v=0;

  2269.         break;

  2270.     }

  2271. }

  2272. 

  2273. static uint16_t roundToInt16(int64_t f){

  2274.     int r= (f + (1<<15))>>16;

  2275.          if (r<-0x7FFF) return 0x8000;

  2276.     else if (r> 0x7FFF) return 0x7FFF;

  2277.     else                return r;

  2278. }

  2279. 

  2280. int sws_setColorspaceDetails(SwsContext *c, const int inv_table[4], int srcRange, const int table[4], int dstRange, int brightness, int contrast, int saturation){

  2281.     int64_t crv =  inv_table[0];

  2282.     int64_t cbu =  inv_table[1];

  2283.     int64_t cgu = -inv_table[2];

  2284.     int64_t cgv = -inv_table[3];

  2285.     int64_t cy  = 1<<16;

  2286.     int64_t oy  = 0;

  2287. 

  2288.     memcpy(c->srcColorspaceTable, inv_table, sizeof(int)*4);

  2289.     memcpy(c->dstColorspaceTable,     table, sizeof(int)*4);

  2290. 

  2291.     c->brightness= brightness;

  2292.     c->contrast  = contrast;

  2293.     c->saturation= saturation;

  2294.     c->srcRange  = srcRange;

  2295.     c->dstRange  = dstRange;

  2296.     if (isYUV(c->dstFormat) || isGray(c->dstFormat)) return -1;

  2297. 

  2298.     c->uOffset=   0x0400040004000400LL;

  2299.     c->vOffset=   0x0400040004000400LL;

  2300. 

  2301.     if (!srcRange){

  2302.         cy= (cy*255) / 219;

  2303.         oy= 16<<16;

  2304.     }else{

  2305.         crv= (crv*224) / 255;

  2306.         cbu= (cbu*224) / 255;

  2307.         cgu= (cgu*224) / 255;

  2308.         cgv= (cgv*224) / 255;

  2309.     }

  2310. 

  2311.     cy = (cy *contrast             )>>16;

  2312.     crv= (crv*contrast * saturation)>>32;

  2313.     cbu= (cbu*contrast * saturation)>>32;

  2314.     cgu= (cgu*contrast * saturation)>>32;

  2315.     cgv= (cgv*contrast * saturation)>>32;

  2316. 

  2317.     oy -= 256*brightness;

  2318. 

  2319.     c->yCoeff=    roundToInt16(cy *8192) * 0x0001000100010001ULL;

  2320.     c->vrCoeff=   roundToInt16(crv*8192) * 0x0001000100010001ULL;

  2321.     c->ubCoeff=   roundToInt16(cbu*8192) * 0x0001000100010001ULL;

  2322.     c->vgCoeff=   roundToInt16(cgv*8192) * 0x0001000100010001ULL;

  2323.     c->ugCoeff=   roundToInt16(cgu*8192) * 0x0001000100010001ULL;

  2324.     c->yOffset=   roundToInt16(oy *   8) * 0x0001000100010001ULL;

  2325. 

  2326.     c->yuv2rgb_y_coeff  = (int16_t)roundToInt16(cy <<13);

  2327.     c->yuv2rgb_y_offset = (int16_t)roundToInt16(oy << 9);

  2328.     c->yuv2rgb_v2r_coeff= (int16_t)roundToInt16(crv<<13);

  2329.     c->yuv2rgb_v2g_coeff= (int16_t)roundToInt16(cgv<<13);

  2330.     c->yuv2rgb_u2g_coeff= (int16_t)roundToInt16(cgu<<13);

  2331.     c->yuv2rgb_u2b_coeff= (int16_t)roundToInt16(cbu<<13);

  2332. 

  2333.     ff_yuv2rgb_c_init_tables(c, inv_table, srcRange, brightness, contrast, saturation);

  2334.     //FIXME factorize

  2335. 

  2336. #ifdef COMPILE_ALTIVEC

  2337.     if (c->flags & SWS_CPU_CAPS_ALTIVEC)

  2338.         ff_yuv2rgb_init_tables_altivec(c, inv_table, brightness, contrast, saturation);

  2339. #endif

  2340.     return 0;

  2341. }

  2342. 

  2343. int sws_getColorspaceDetails(SwsContext *c, int **inv_table, int *srcRange, int **table, int *dstRange, int *brightness, int *contrast, int *saturation){

  2344.     if (isYUV(c->dstFormat) || isGray(c->dstFormat)) return -1;

  2345. 

  2346.     *inv_table = c->srcColorspaceTable;

  2347.     *table     = c->dstColorspaceTable;

  2348.     *srcRange  = c->srcRange;

  2349.     *dstRange  = c->dstRange;

  2350.     *brightness= c->brightness;

  2351.     *contrast  = c->contrast;

  2352.     *saturation= c->saturation;

  2353. 

  2354.     return 0;

  2355. }

  2356. 

  2357. static int handle_jpeg(enum PixelFormat *format)

  2358. {

  2359.     switch (*format) {

  2360.         case PIX_FMT_YUVJ420P:

  2361.             *format = PIX_FMT_YUV420P;

  2362.             return 1;

  2363.         case PIX_FMT_YUVJ422P:

  2364.             *format = PIX_FMT_YUV422P;

  2365.             return 1;

  2366.         case PIX_FMT_YUVJ444P:

  2367.             *format = PIX_FMT_YUV444P;

  2368.             return 1;

  2369.         case PIX_FMT_YUVJ440P:

  2370.             *format = PIX_FMT_YUV440P;

  2371.             return 1;

  2372.         default:

  2373.             return 0;

  2374.     }

  2375. }

  2376. 

  2377. SwsContext *sws_getContext(int srcW, int srcH, enum PixelFormat srcFormat, int dstW, int dstH, enum PixelFormat dstFormat, int flags,

  2378.                            SwsFilter *srcFilter, SwsFilter *dstFilter, const double *param)

  2379. {

  2380. 

  2381.     SwsContext *c;

  2382.     int i;

  2383.     int usesVFilter, usesHFilter;

  2384.     int unscaled, needsDither;

  2385.     int srcRange, dstRange;

  2386.     SwsFilter dummyFilter= {NULL, NULL, NULL, NULL};

  2387. #if ARCH_X86

  2388.     if (flags & SWS_CPU_CAPS_MMX)

  2389.         __asm__ volatile("emms\n\t"::: "memory");

  2390. #endif

  2391. 

  2392. #if !CONFIG_RUNTIME_CPUDETECT || !CONFIG_GPL //ensure that the flags match the compiled variant if cpudetect is off

  2393.     flags &= ~(SWS_CPU_CAPS_MMX|SWS_CPU_CAPS_MMX2|SWS_CPU_CAPS_3DNOW|SWS_CPU_CAPS_ALTIVEC|SWS_CPU_CAPS_BFIN);

  2394. #if   HAVE_MMX2

  2395.     flags |= SWS_CPU_CAPS_MMX|SWS_CPU_CAPS_MMX2;

  2396. #elif HAVE_AMD3DNOW

  2397.     flags |= SWS_CPU_CAPS_MMX|SWS_CPU_CAPS_3DNOW;

  2398. #elif HAVE_MMX

  2399.     flags |= SWS_CPU_CAPS_MMX;

  2400. #elif HAVE_ALTIVEC

  2401.     flags |= SWS_CPU_CAPS_ALTIVEC;

  2402. #elif ARCH_BFIN

  2403.     flags |= SWS_CPU_CAPS_BFIN;

  2404. #endif

  2405. #endif /* CONFIG_RUNTIME_CPUDETECT */

  2406.     if (clip_table[512] != 255) globalInit();

  2407.     if (!rgb15to16) sws_rgb2rgb_init(flags);

  2408. 

  2409.     unscaled = (srcW == dstW && srcH == dstH);

  2410.     needsDither= (isBGR(dstFormat) || isRGB(dstFormat))

  2411.         && (fmt_depth(dstFormat))<24

  2412.         && ((fmt_depth(dstFormat))<(fmt_depth(srcFormat)) || (!(isRGB(srcFormat) || isBGR(srcFormat))));

  2413. 

  2414.     srcRange = handle_jpeg(&srcFormat);

  2415.     dstRange = handle_jpeg(&dstFormat);

  2416. 

  2417.     if (!isSupportedIn(srcFormat))

  2418.     {

  2419.         av_log(NULL, AV_LOG_ERROR, "swScaler: %s is not supported as input pixel format\n", sws_format_name(srcFormat));

  2420.         return NULL;

  2421.     }

  2422.     if (!isSupportedOut(dstFormat))

  2423.     {

  2424.         av_log(NULL, AV_LOG_ERROR, "swScaler: %s is not supported as output pixel format\n", sws_format_name(dstFormat));

  2425.         return NULL;

  2426.     }

  2427. 

  2428.     i= flags & ( SWS_POINT

  2429.                 |SWS_AREA

  2430.                 |SWS_BILINEAR

  2431.                 |SWS_FAST_BILINEAR

  2432.                 |SWS_BICUBIC

  2433.                 |SWS_X

  2434.                 |SWS_GAUSS

  2435.                 |SWS_LANCZOS

  2436.                 |SWS_SINC

  2437.                 |SWS_SPLINE

  2438.                 |SWS_BICUBLIN);

  2439.     if(!i || (i & (i-1)))

  2440.     {

  2441.         av_log(NULL, AV_LOG_ERROR, "swScaler: Exactly one scaler algorithm must be chosen\n");

  2442.         return NULL;

  2443.     }

  2444. 

  2445.     /* sanity check */

  2446.     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

  2447.     {

  2448.         av_log(NULL, AV_LOG_ERROR, "swScaler: %dx%d -> %dx%d is invalid scaling dimension\n",

  2449.                srcW, srcH, dstW, dstH);

  2450.         return NULL;

  2451.     }

  2452.     if(srcW > VOFW || dstW > VOFW){

  2453.         av_log(NULL, AV_LOG_ERROR, "swScaler: Compile-time maximum width is "AV_STRINGIFY(VOFW)" change VOF/VOFW and recompile\n");

  2454.         return NULL;

  2455.     }

  2456. 

  2457.     if (!dstFilter) dstFilter= &dummyFilter;

  2458.     if (!srcFilter) srcFilter= &dummyFilter;

  2459. 

  2460.     c= av_mallocz(sizeof(SwsContext));

  2461. 

  2462.     c->av_class = &sws_context_class;

  2463.     c->srcW= srcW;

  2464.     c->srcH= srcH;

  2465.     c->dstW= dstW;

  2466.     c->dstH= dstH;

  2467.     c->lumXInc= ((srcW<<16) + (dstW>>1))/dstW;

  2468.     c->lumYInc= ((srcH<<16) + (dstH>>1))/dstH;

  2469.     c->flags= flags;

  2470.     c->dstFormat= dstFormat;

  2471.     c->srcFormat= srcFormat;

  2472.     c->vRounder= 4* 0x0001000100010001ULL;

  2473. 

  2474.     usesHFilter= usesVFilter= 0;

  2475.     if (dstFilter->lumV && dstFilter->lumV->length>1) usesVFilter=1;

  2476.     if (dstFilter->lumH && dstFilter->lumH->length>1) usesHFilter=1;

  2477.     if (dstFilter->chrV && dstFilter->chrV->length>1) usesVFilter=1;

  2478.     if (dstFilter->chrH && dstFilter->chrH->length>1) usesHFilter=1;

  2479.     if (srcFilter->lumV && srcFilter->lumV->length>1) usesVFilter=1;

  2480.     if (srcFilter->lumH && srcFilter->lumH->length>1) usesHFilter=1;

  2481.     if (srcFilter->chrV && srcFilter->chrV->length>1) usesVFilter=1;

  2482.     if (srcFilter->chrH && srcFilter->chrH->length>1) usesHFilter=1;

  2483. 

  2484.     getSubSampleFactors(&c->chrSrcHSubSample, &c->chrSrcVSubSample, srcFormat);

  2485.     getSubSampleFactors(&c->chrDstHSubSample, &c->chrDstVSubSample, dstFormat);

  2486. 

  2487.     // reuse chroma for 2 pixels RGB/BGR unless user wants full chroma interpolation

  2488.     if ((isBGR(dstFormat) || isRGB(dstFormat)) && !(flags&SWS_FULL_CHR_H_INT)) c->chrDstHSubSample=1;

  2489. 

  2490.     // drop some chroma lines if the user wants it

  2491.     c->vChrDrop= (flags&SWS_SRC_V_CHR_DROP_MASK)>>SWS_SRC_V_CHR_DROP_SHIFT;

  2492.     c->chrSrcVSubSample+= c->vChrDrop;

  2493. 

  2494.     // drop every other pixel for chroma calculation unless user wants full chroma

  2495.     if ((isBGR(srcFormat) || isRGB(srcFormat)) && !(flags&SWS_FULL_CHR_H_INP)

  2496.       && srcFormat!=PIX_FMT_RGB8      && srcFormat!=PIX_FMT_BGR8

  2497.       && srcFormat!=PIX_FMT_RGB4      && srcFormat!=PIX_FMT_BGR4

  2498.       && srcFormat!=PIX_FMT_RGB4_BYTE && srcFormat!=PIX_FMT_BGR4_BYTE

  2499.       && ((dstW>>c->chrDstHSubSample) <= (srcW>>1) || (flags&(SWS_FAST_BILINEAR|SWS_POINT))))

  2500.         c->chrSrcHSubSample=1;

  2501. 

  2502.     if (param){

  2503.         c->param[0] = param[0];

  2504.         c->param[1] = param[1];

  2505.     }else{

  2506.         c->param[0] =

  2507.         c->param[1] = SWS_PARAM_DEFAULT;

  2508.     }

  2509. 

  2510.     c->chrIntHSubSample= c->chrDstHSubSample;

  2511.     c->chrIntVSubSample= c->chrSrcVSubSample;

  2512. 

  2513.     // Note the -((-x)>>y) is so that we always round toward +inf.

  2514.     c->chrSrcW= -((-srcW) >> c->chrSrcHSubSample);

  2515.     c->chrSrcH= -((-srcH) >> c->chrSrcVSubSample);

  2516.     c->chrDstW= -((-dstW) >> c->chrDstHSubSample);

  2517.     c->chrDstH= -((-dstH) >> c->chrDstVSubSample);

  2518. 

  2519.     sws_setColorspaceDetails(c, ff_yuv2rgb_coeffs[SWS_CS_DEFAULT], srcRange, ff_yuv2rgb_coeffs[SWS_CS_DEFAULT] /* FIXME*/, dstRange, 0, 1<<16, 1<<16);

  2520. 

  2521.     /* unscaled special cases */

  2522.     if (unscaled && !usesHFilter && !usesVFilter && (srcRange == dstRange || isBGR(dstFormat) || isRGB(dstFormat)))

  2523.     {

  2524.         /* yv12_to_nv12 */

  2525.         if ((srcFormat == PIX_FMT_YUV420P || srcFormat == PIX_FMT_YUVA420P) && (dstFormat == PIX_FMT_NV12 || dstFormat == PIX_FMT_NV21))

  2526.         {

  2527.             c->swScale= PlanarToNV12Wrapper;

  2528.         }

  2529.         /* yuv2bgr */

  2530.         if ((srcFormat==PIX_FMT_YUV420P || srcFormat==PIX_FMT_YUV422P || srcFormat==PIX_FMT_YUVA420P) && (isBGR(dstFormat) || isRGB(dstFormat))

  2531.             && !(flags & SWS_ACCURATE_RND) && !(dstH&1))

  2532.         {

  2533.             c->swScale= ff_yuv2rgb_get_func_ptr(c);

  2534.         }

  2535. 

  2536.         if (srcFormat==PIX_FMT_YUV410P && (dstFormat==PIX_FMT_YUV420P || dstFormat==PIX_FMT_YUVA420P) && !(flags & SWS_BITEXACT))

  2537.         {

  2538.             c->swScale= yvu9toyv12Wrapper;

  2539.         }

  2540. 

  2541.         /* bgr24toYV12 */

  2542.         if (srcFormat==PIX_FMT_BGR24 && (dstFormat==PIX_FMT_YUV420P || dstFormat==PIX_FMT_YUVA420P) && !(flags & SWS_ACCURATE_RND))

  2543.             c->swScale= bgr24toyv12Wrapper;

  2544. 

  2545.         /* RGB/BGR -> RGB/BGR (no dither needed forms) */

  2546.         if (  (isBGR(srcFormat) || isRGB(srcFormat))

  2547.            && (isBGR(dstFormat) || isRGB(dstFormat))

  2548.            && srcFormat != PIX_FMT_BGR8      && dstFormat != PIX_FMT_BGR8

  2549.            && srcFormat != PIX_FMT_RGB8      && dstFormat != PIX_FMT_RGB8

  2550.            && srcFormat != PIX_FMT_BGR4      && dstFormat != PIX_FMT_BGR4

  2551.            && srcFormat != PIX_FMT_RGB4      && dstFormat != PIX_FMT_RGB4

  2552.            && srcFormat != PIX_FMT_BGR4_BYTE && dstFormat != PIX_FMT_BGR4_BYTE

  2553.            && srcFormat != PIX_FMT_RGB4_BYTE && dstFormat != PIX_FMT_RGB4_BYTE

  2554.            && srcFormat != PIX_FMT_MONOBLACK && dstFormat != PIX_FMT_MONOBLACK

  2555.            && srcFormat != PIX_FMT_MONOWHITE && dstFormat != PIX_FMT_MONOWHITE

  2556.                                              && dstFormat != PIX_FMT_RGB32_1

  2557.                                              && dstFormat != PIX_FMT_BGR32_1

  2558.            && (!needsDither || (c->flags&(SWS_FAST_BILINEAR|SWS_POINT))))

  2559.              c->swScale= rgb2rgbWrapper;

  2560. 

  2561.         if ((usePal(srcFormat) && (

  2562.                  dstFormat == PIX_FMT_RGB32   ||

  2563.                  dstFormat == PIX_FMT_RGB32_1 ||

  2564.                  dstFormat == PIX_FMT_RGB24   ||

  2565.                  dstFormat == PIX_FMT_BGR32   ||

  2566.                  dstFormat == PIX_FMT_BGR32_1 ||

  2567.                  dstFormat == PIX_FMT_BGR24)))

  2568.              c->swScale= pal2rgbWrapper;

  2569. 

  2570.         if (srcFormat == PIX_FMT_YUV422P)

  2571.         {

  2572.             if (dstFormat == PIX_FMT_YUYV422)

  2573.                 c->swScale= YUV422PToYuy2Wrapper;

  2574.             else if (dstFormat == PIX_FMT_UYVY422)

  2575.                 c->swScale= YUV422PToUyvyWrapper;

  2576.         }

  2577. 

  2578.         /* LQ converters if -sws 0 or -sws 4*/

  2579.         if (c->flags&(SWS_FAST_BILINEAR|SWS_POINT)){

  2580.             /* yv12_to_yuy2 */

  2581.             if (srcFormat == PIX_FMT_YUV420P || srcFormat == PIX_FMT_YUVA420P)

  2582.             {

  2583.                 if (dstFormat == PIX_FMT_YUYV422)

  2584.                     c->swScale= PlanarToYuy2Wrapper;

  2585.                 else if (dstFormat == PIX_FMT_UYVY422)

  2586.                     c->swScale= PlanarToUyvyWrapper;

  2587.             }

  2588.         }

  2589.         if(srcFormat == PIX_FMT_YUYV422 && (dstFormat == PIX_FMT_YUV420P || dstFormat == PIX_FMT_YUVA420P))

  2590.             c->swScale= YUYV2YUV420Wrapper;

  2591.         if(srcFormat == PIX_FMT_UYVY422 && (dstFormat == PIX_FMT_YUV420P || dstFormat == PIX_FMT_YUVA420P))

  2592.             c->swScale= UYVY2YUV420Wrapper;

  2593.         if(srcFormat == PIX_FMT_YUYV422 && dstFormat == PIX_FMT_YUV422P)

  2594.             c->swScale= YUYV2YUV422Wrapper;

  2595.         if(srcFormat == PIX_FMT_UYVY422 && dstFormat == PIX_FMT_YUV422P)

  2596.             c->swScale= UYVY2YUV422Wrapper;

  2597. 

  2598. #ifdef COMPILE_ALTIVEC

  2599.         if ((c->flags & SWS_CPU_CAPS_ALTIVEC) &&

  2600.             !(c->flags & SWS_BITEXACT) &&

  2601.             srcFormat == PIX_FMT_YUV420P) {

  2602.           // unscaled YV12 -> packed YUV, we want speed

  2603.           if (dstFormat == PIX_FMT_YUYV422)

  2604.               c->swScale= yv12toyuy2_unscaled_altivec;

  2605.           else if (dstFormat == PIX_FMT_UYVY422)

  2606.               c->swScale= yv12touyvy_unscaled_altivec;

  2607.         }

  2608. #endif

  2609. 

  2610.         /* simple copy */

  2611.         if (  srcFormat == dstFormat

  2612.             || (srcFormat == PIX_FMT_YUVA420P && dstFormat == PIX_FMT_YUV420P)

  2613.             || (srcFormat == PIX_FMT_YUV420P && dstFormat == PIX_FMT_YUVA420P)

  2614.             || (isPlanarYUV(srcFormat) && isGray(dstFormat))

  2615.             || (isPlanarYUV(dstFormat) && isGray(srcFormat))

  2616.             || (isGray(dstFormat) && isGray(srcFormat))

  2617.             || (isPlanarYUV(srcFormat) && isPlanarYUV(dstFormat)

  2618.                 && c->chrDstHSubSample == c->chrSrcHSubSample

  2619.                 && c->chrDstVSubSample == c->chrSrcVSubSample))

  2620.         {

  2621.             if (isPacked(c->srcFormat))

  2622.                 c->swScale= packedCopy;

  2623.             else /* Planar YUV or gray */

  2624.                 c->swScale= planarCopy;

  2625.         }

  2626. #if ARCH_BFIN

  2627.         if (flags & SWS_CPU_CAPS_BFIN)

  2628.             ff_bfin_get_unscaled_swscale (c);

  2629. #endif

  2630. 

  2631.         if (c->swScale){

  2632.             if (flags&SWS_PRINT_INFO)

  2633.                 av_log(c, AV_LOG_INFO, "using unscaled %s -> %s special converter\n",

  2634.                                 sws_format_name(srcFormat), sws_format_name(dstFormat));

  2635.             return c;

  2636.         }

  2637.     }

  2638. 

  2639.     if (flags & SWS_CPU_CAPS_MMX2)

  2640.     {

  2641.         c->canMMX2BeUsed= (dstW >=srcW && (dstW&31)==0 && (srcW&15)==0) ? 1 : 0;

  2642.         if (!c->canMMX2BeUsed && dstW >=srcW && (srcW&15)==0 && (flags&SWS_FAST_BILINEAR))

  2643.         {

  2644.             if (flags&SWS_PRINT_INFO)

  2645.                 av_log(c, AV_LOG_INFO, "output width is not a multiple of 32 -> no MMX2 scaler\n");

  2646.         }

  2647.         if (usesHFilter) c->canMMX2BeUsed=0;

  2648.     }

  2649.     else

  2650.         c->canMMX2BeUsed=0;

  2651. 

  2652.     c->chrXInc= ((c->chrSrcW<<16) + (c->chrDstW>>1))/c->chrDstW;

  2653.     c->chrYInc= ((c->chrSrcH<<16) + (c->chrDstH>>1))/c->chrDstH;

  2654. 

  2655.     // match pixel 0 of the src to pixel 0 of dst and match pixel n-2 of src to pixel n-2 of dst

  2656.     // but only for the FAST_BILINEAR mode otherwise do correct scaling

  2657.     // n-2 is the last chrominance sample available

  2658.     // this is not perfect, but no one should notice the difference, the more correct variant

  2659.     // would be like the vertical one, but that would require some special code for the

  2660.     // first and last pixel

  2661.     if (flags&SWS_FAST_BILINEAR)

  2662.     {

  2663.         if (c->canMMX2BeUsed)

  2664.         {

  2665.             c->lumXInc+= 20;

  2666.             c->chrXInc+= 20;

  2667.         }

  2668.         //we don't use the x86 asm scaler if MMX is available

  2669.         else if (flags & SWS_CPU_CAPS_MMX)

  2670.         {

  2671.             c->lumXInc = ((srcW-2)<<16)/(dstW-2) - 20;

  2672.             c->chrXInc = ((c->chrSrcW-2)<<16)/(c->chrDstW-2) - 20;

  2673.         }

  2674.     }

  2675. 

  2676.     /* precalculate horizontal scaler filter coefficients */

  2677.     {

  2678.         const int filterAlign=

  2679.             (flags & SWS_CPU_CAPS_MMX) ? 4 :

  2680.             (flags & SWS_CPU_CAPS_ALTIVEC) ? 8 :

  2681.             1;

  2682. 

  2683.         initFilter(&c->hLumFilter, &c->hLumFilterPos, &c->hLumFilterSize, c->lumXInc,

  2684.                    srcW      ,       dstW, filterAlign, 1<<14,

  2685.                    (flags&SWS_BICUBLIN) ? (flags|SWS_BICUBIC)  : flags,

  2686.                    srcFilter->lumH, dstFilter->lumH, c->param);

  2687.         initFilter(&c->hChrFilter, &c->hChrFilterPos, &c->hChrFilterSize, c->chrXInc,

  2688.                    c->chrSrcW, c->chrDstW, filterAlign, 1<<14,

  2689.                    (flags&SWS_BICUBLIN) ? (flags|SWS_BILINEAR) : flags,

  2690.                    srcFilter->chrH, dstFilter->chrH, c->param);

  2691. 

  2692. #define MAX_FUNNY_CODE_SIZE 10000

  2693. #if defined(COMPILE_MMX2)

  2694. // can't downscale !!!

  2695.         if (c->canMMX2BeUsed && (flags & SWS_FAST_BILINEAR))

  2696.         {

  2697. #ifdef MAP_ANONYMOUS

  2698.             c->funnyYCode  = mmap(NULL, MAX_FUNNY_CODE_SIZE, PROT_EXEC | PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, 0, 0);

  2699.             c->funnyUVCode = mmap(NULL, MAX_FUNNY_CODE_SIZE, PROT_EXEC | PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, 0, 0);

  2700. #elif HAVE_VIRTUALALLOC

  2701.             c->funnyYCode  = VirtualAlloc(NULL, MAX_FUNNY_CODE_SIZE, MEM_COMMIT, PAGE_EXECUTE_READWRITE);

  2702.             c->funnyUVCode = VirtualAlloc(NULL, MAX_FUNNY_CODE_SIZE, MEM_COMMIT, PAGE_EXECUTE_READWRITE);

  2703. #else

  2704.             c->funnyYCode  = av_malloc(MAX_FUNNY_CODE_SIZE);

  2705.             c->funnyUVCode = av_malloc(MAX_FUNNY_CODE_SIZE);

  2706. #endif

  2707. 

  2708.             c->lumMmx2Filter   = av_malloc((dstW        /8+8)*sizeof(int16_t));

  2709.             c->chrMmx2Filter   = av_malloc((c->chrDstW  /4+8)*sizeof(int16_t));

  2710.             c->lumMmx2FilterPos= av_malloc((dstW      /2/8+8)*sizeof(int32_t));

  2711.             c->chrMmx2FilterPos= av_malloc((c->chrDstW/2/4+8)*sizeof(int32_t));

  2712. 

  2713.             initMMX2HScaler(      dstW, c->lumXInc, c->funnyYCode , c->lumMmx2Filter, c->lumMmx2FilterPos, 8);

  2714.             initMMX2HScaler(c->chrDstW, c->chrXInc, c->funnyUVCode, c->chrMmx2Filter, c->chrMmx2FilterPos, 4);

  2715.         }

  2716. #endif /* defined(COMPILE_MMX2) */

  2717.     } // initialize horizontal stuff

  2718. 

  2719. 

  2720. 

  2721.     /* precalculate vertical scaler filter coefficients */

  2722.     {

  2723.         const int filterAlign=

  2724.             (flags & SWS_CPU_CAPS_MMX) && (flags & SWS_ACCURATE_RND) ? 2 :

  2725.             (flags & SWS_CPU_CAPS_ALTIVEC) ? 8 :

  2726.             1;

  2727. 

  2728.         initFilter(&c->vLumFilter, &c->vLumFilterPos, &c->vLumFilterSize, c->lumYInc,

  2729.                    srcH      ,        dstH, filterAlign, (1<<12),

  2730.                    (flags&SWS_BICUBLIN) ? (flags|SWS_BICUBIC)  : flags,

  2731.                    srcFilter->lumV, dstFilter->lumV, c->param);

  2732.         initFilter(&c->vChrFilter, &c->vChrFilterPos, &c->vChrFilterSize, c->chrYInc,

  2733.                    c->chrSrcH, c->chrDstH, filterAlign, (1<<12),

  2734.                    (flags&SWS_BICUBLIN) ? (flags|SWS_BILINEAR) : flags,

  2735.                    srcFilter->chrV, dstFilter->chrV, c->param);

  2736. 

  2737. #if HAVE_ALTIVEC

  2738.         c->vYCoeffsBank = av_malloc(sizeof (vector signed short)*c->vLumFilterSize*c->dstH);

  2739.         c->vCCoeffsBank = av_malloc(sizeof (vector signed short)*c->vChrFilterSize*c->chrDstH);

  2740. 

  2741.         for (i=0;i<c->vLumFilterSize*c->dstH;i++) {

  2742.             int j;

  2743.             short *p = (short *)&c->vYCoeffsBank[i];

  2744.             for (j=0;j<8;j++)

  2745.                 p[j] = c->vLumFilter[i];

  2746.         }

  2747. 

  2748.         for (i=0;i<c->vChrFilterSize*c->chrDstH;i++) {

  2749.             int j;

  2750.             short *p = (short *)&c->vCCoeffsBank[i];

  2751.             for (j=0;j<8;j++)

  2752.                 p[j] = c->vChrFilter[i];

  2753.         }

  2754. #endif

  2755.     }

  2756. 

  2757.     // calculate buffer sizes so that they won't run out while handling these damn slices

  2758.     c->vLumBufSize= c->vLumFilterSize;

  2759.     c->vChrBufSize= c->vChrFilterSize;

  2760.     for (i=0; i<dstH; i++)

  2761.     {

  2762.         int chrI= i*c->chrDstH / dstH;

  2763.         int nextSlice= FFMAX(c->vLumFilterPos[i   ] + c->vLumFilterSize - 1,

  2764.                            ((c->vChrFilterPos[chrI] + c->vChrFilterSize - 1)<<c->chrSrcVSubSample));

  2765. 

  2766.         nextSlice>>= c->chrSrcVSubSample;

  2767.         nextSlice<<= c->chrSrcVSubSample;

  2768.         if (c->vLumFilterPos[i   ] + c->vLumBufSize < nextSlice)

  2769.             c->vLumBufSize= nextSlice - c->vLumFilterPos[i];

  2770.         if (c->vChrFilterPos[chrI] + c->vChrBufSize < (nextSlice>>c->chrSrcVSubSample))

  2771.             c->vChrBufSize= (nextSlice>>c->chrSrcVSubSample) - c->vChrFilterPos[chrI];

  2772.     }

  2773. 

  2774.     // allocate pixbufs (we use dynamic allocation because otherwise we would need to

  2775.     c->lumPixBuf= av_malloc(c->vLumBufSize*2*sizeof(int16_t*));

  2776.     c->chrPixBuf= av_malloc(c->vChrBufSize*2*sizeof(int16_t*));

  2777.     if (CONFIG_SWSCALE_ALPHA && isALPHA(c->srcFormat) && isALPHA(c->dstFormat))

  2778.         c->alpPixBuf= av_malloc(c->vLumBufSize*2*sizeof(int16_t*));

  2779.     //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)

  2780.     /* align at 16 bytes for AltiVec */

  2781.     for (i=0; i<c->vLumBufSize; i++)

  2782.         c->lumPixBuf[i]= c->lumPixBuf[i+c->vLumBufSize]= av_mallocz(VOF+1);

  2783.     for (i=0; i<c->vChrBufSize; i++)

  2784.         c->chrPixBuf[i]= c->chrPixBuf[i+c->vChrBufSize]= av_malloc((VOF+1)*2);

  2785.     if (CONFIG_SWSCALE_ALPHA && c->alpPixBuf)

  2786.         for (i=0; i<c->vLumBufSize; i++)

  2787.             c->alpPixBuf[i]= c->alpPixBuf[i+c->vLumBufSize]= av_mallocz(VOF+1);

  2788. 

  2789.     //try to avoid drawing green stuff between the right end and the stride end

  2790.     for (i=0; i<c->vChrBufSize; i++) memset(c->chrPixBuf[i], 64, (VOF+1)*2);

  2791. 

  2792.     assert(2*VOFW == VOF);

  2793. 

  2794.     assert(c->chrDstH <= dstH);

  2795. 

  2796.     if (flags&SWS_PRINT_INFO)

  2797.     {

  2798. #ifdef DITHER1XBPP

  2799.         const char *dither= " dithered";

  2800. #else

  2801.         const char *dither= "";

  2802. #endif

  2803.         if (flags&SWS_FAST_BILINEAR)

  2804.             av_log(c, AV_LOG_INFO, "FAST_BILINEAR scaler, ");

  2805.         else if (flags&SWS_BILINEAR)

  2806.             av_log(c, AV_LOG_INFO, "BILINEAR scaler, ");

  2807.         else if (flags&SWS_BICUBIC)

  2808.             av_log(c, AV_LOG_INFO, "BICUBIC scaler, ");

  2809.         else if (flags&SWS_X)

  2810.             av_log(c, AV_LOG_INFO, "Experimental scaler, ");

  2811.         else if (flags&SWS_POINT)

  2812.             av_log(c, AV_LOG_INFO, "Nearest Neighbor / POINT scaler, ");

  2813.         else if (flags&SWS_AREA)

  2814.             av_log(c, AV_LOG_INFO, "Area Averageing scaler, ");

  2815.         else if (flags&SWS_BICUBLIN)

  2816.             av_log(c, AV_LOG_INFO, "luma BICUBIC / chroma BILINEAR scaler, ");

  2817.         else if (flags&SWS_GAUSS)

  2818.             av_log(c, AV_LOG_INFO, "Gaussian scaler, ");

  2819.         else if (flags&SWS_SINC)

  2820.             av_log(c, AV_LOG_INFO, "Sinc scaler, ");

  2821.         else if (flags&SWS_LANCZOS)

  2822.             av_log(c, AV_LOG_INFO, "Lanczos scaler, ");

  2823.         else if (flags&SWS_SPLINE)

  2824.             av_log(c, AV_LOG_INFO, "Bicubic spline scaler, ");

  2825.         else

  2826.             av_log(c, AV_LOG_INFO, "ehh flags invalid?! ");

  2827. 

  2828.         if (dstFormat==PIX_FMT_BGR555 || dstFormat==PIX_FMT_BGR565)

  2829.             av_log(c, AV_LOG_INFO, "from %s to%s %s ",

  2830.                    sws_format_name(srcFormat), dither, sws_format_name(dstFormat));

  2831.         else

  2832.             av_log(c, AV_LOG_INFO, "from %s to %s ",

  2833.                    sws_format_name(srcFormat), sws_format_name(dstFormat));

  2834. 

  2835.         if (flags & SWS_CPU_CAPS_MMX2)

  2836.             av_log(c, AV_LOG_INFO, "using MMX2\n");

  2837.         else if (flags & SWS_CPU_CAPS_3DNOW)

  2838.             av_log(c, AV_LOG_INFO, "using 3DNOW\n");

  2839.         else if (flags & SWS_CPU_CAPS_MMX)

  2840.             av_log(c, AV_LOG_INFO, "using MMX\n");

  2841.         else if (flags & SWS_CPU_CAPS_ALTIVEC)

  2842.             av_log(c, AV_LOG_INFO, "using AltiVec\n");

  2843.         else

  2844.             av_log(c, AV_LOG_INFO, "using C\n");

  2845.     }

  2846. 

  2847.     if (flags & SWS_PRINT_INFO)

  2848.     {

  2849.         if (flags & SWS_CPU_CAPS_MMX)

  2850.         {

  2851.             if (c->canMMX2BeUsed && (flags&SWS_FAST_BILINEAR))

  2852.                 av_log(c, AV_LOG_VERBOSE, "using FAST_BILINEAR MMX2 scaler for horizontal scaling\n");

  2853.             else

  2854.             {

  2855.                 if (c->hLumFilterSize==4)

  2856.                     av_log(c, AV_LOG_VERBOSE, "using 4-tap MMX scaler for horizontal luminance scaling\n");

  2857.                 else if (c->hLumFilterSize==8)

  2858.                     av_log(c, AV_LOG_VERBOSE, "using 8-tap MMX scaler for horizontal luminance scaling\n");

  2859.                 else

  2860.                     av_log(c, AV_LOG_VERBOSE, "using n-tap MMX scaler for horizontal luminance scaling\n");

  2861. 

  2862.                 if (c->hChrFilterSize==4)

  2863.                     av_log(c, AV_LOG_VERBOSE, "using 4-tap MMX scaler for horizontal chrominance scaling\n");

  2864.                 else if (c->hChrFilterSize==8)

  2865.                     av_log(c, AV_LOG_VERBOSE, "using 8-tap MMX scaler for horizontal chrominance scaling\n");

  2866.                 else

  2867.                     av_log(c, AV_LOG_VERBOSE, "using n-tap MMX scaler for horizontal chrominance scaling\n");

  2868.             }

  2869.         }

  2870.         else

  2871.         {

  2872. #if ARCH_X86

  2873.             av_log(c, AV_LOG_VERBOSE, "using x86 asm scaler for horizontal scaling\n");

  2874. #else

  2875.             if (flags & SWS_FAST_BILINEAR)

  2876.                 av_log(c, AV_LOG_VERBOSE, "using FAST_BILINEAR C scaler for horizontal scaling\n");

  2877.             else

  2878.                 av_log(c, AV_LOG_VERBOSE, "using C scaler for horizontal scaling\n");

  2879. #endif

  2880.         }

  2881.         if (isPlanarYUV(dstFormat))

  2882.         {

  2883.             if (c->vLumFilterSize==1)

  2884.                 av_log(c, AV_LOG_VERBOSE, "using 1-tap %s \"scaler\" for vertical scaling (YV12 like)\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");

  2885.             else

  2886.                 av_log(c, AV_LOG_VERBOSE, "using n-tap %s scaler for vertical scaling (YV12 like)\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");

  2887.         }

  2888.         else

  2889.         {

  2890.             if (c->vLumFilterSize==1 && c->vChrFilterSize==2)

  2891.                 av_log(c, AV_LOG_VERBOSE, "using 1-tap %s \"scaler\" for vertical luminance scaling (BGR)\n"

  2892.                        "      2-tap scaler for vertical chrominance scaling (BGR)\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");

  2893.             else if (c->vLumFilterSize==2 && c->vChrFilterSize==2)

  2894.                 av_log(c, AV_LOG_VERBOSE, "using 2-tap linear %s scaler for vertical scaling (BGR)\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");

  2895.             else

  2896.                 av_log(c, AV_LOG_VERBOSE, "using n-tap %s scaler for vertical scaling (BGR)\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");

  2897.         }

  2898. 

  2899.         if (dstFormat==PIX_FMT_BGR24)

  2900.             av_log(c, AV_LOG_VERBOSE, "using %s YV12->BGR24 converter\n",

  2901.                    (flags & SWS_CPU_CAPS_MMX2) ? "MMX2" : ((flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C"));

  2902.         else if (dstFormat==PIX_FMT_RGB32)

  2903.             av_log(c, AV_LOG_VERBOSE, "using %s YV12->BGR32 converter\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");

  2904.         else if (dstFormat==PIX_FMT_BGR565)

  2905.             av_log(c, AV_LOG_VERBOSE, "using %s YV12->BGR16 converter\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");

  2906.         else if (dstFormat==PIX_FMT_BGR555)

  2907.             av_log(c, AV_LOG_VERBOSE, "using %s YV12->BGR15 converter\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");

  2908. 

  2909.         av_log(c, AV_LOG_VERBOSE, "%dx%d -> %dx%d\n", srcW, srcH, dstW, dstH);

  2910.     }

  2911.     if (flags & SWS_PRINT_INFO)

  2912.     {

  2913.         av_log(c, AV_LOG_DEBUG, "lum srcW=%d srcH=%d dstW=%d dstH=%d xInc=%d yInc=%d\n",

  2914.                c->srcW, c->srcH, c->dstW, c->dstH, c->lumXInc, c->lumYInc);

  2915.         av_log(c, AV_LOG_DEBUG, "chr srcW=%d srcH=%d dstW=%d dstH=%d xInc=%d yInc=%d\n",

  2916.                c->chrSrcW, c->chrSrcH, c->chrDstW, c->chrDstH, c->chrXInc, c->chrYInc);

  2917.     }

  2918. 

  2919.     c->swScale= getSwsFunc(c);

  2920.     return c;

  2921. }

  2922. 

  2923. static void reset_ptr(uint8_t* src[], int format){

  2924.     if(!isALPHA(format))

  2925.         src[3]=NULL;

  2926.     if(!isPlanarYUV(format)){

  2927.         src[3]=src[2]=NULL;

  2928.         if(   format != PIX_FMT_PAL8

  2929.            && format != PIX_FMT_RGB8

  2930.            && format != PIX_FMT_BGR8

  2931.            && format != PIX_FMT_RGB4_BYTE

  2932.            && format != PIX_FMT_BGR4_BYTE

  2933.           )

  2934.             src[1]= NULL;

  2935.     }

  2936. }

  2937. 

  2938. /**

  2939.  * swscale wrapper, so we don't need to export the SwsContext.

  2940.  * Assumes planar YUV to be in YUV order instead of YVU.

  2941.  */

  2942. int sws_scale(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  2943.               int srcSliceH, uint8_t* dst[], int dstStride[]){

  2944.     int i;

  2945.     uint8_t* src2[4]= {src[0], src[1], src[2], src[3]};

  2946.     uint8_t* dst2[4]= {dst[0], dst[1], dst[2], dst[3]};

  2947. 

  2948.     if (c->sliceDir == 0 && srcSliceY != 0 && srcSliceY + srcSliceH != c->srcH) {

  2949.         av_log(c, AV_LOG_ERROR, "Slices start in the middle!\n");

  2950.         return 0;

  2951.     }

  2952.     if (c->sliceDir == 0) {

  2953.         if (srcSliceY == 0) c->sliceDir = 1; else c->sliceDir = -1;

  2954.     }

  2955. 

  2956.     if (usePal(c->srcFormat)){

  2957.         for (i=0; i<256; i++){

  2958.             int p, r, g, b,y,u,v;

  2959.             if(c->srcFormat == PIX_FMT_PAL8){

  2960.                 p=((uint32_t*)(src[1]))[i];

  2961.                 r= (p>>16)&0xFF;

  2962.                 g= (p>> 8)&0xFF;

  2963.                 b=  p     &0xFF;

  2964.             }else if(c->srcFormat == PIX_FMT_RGB8){

  2965.                 r= (i>>5    )*36;

  2966.                 g= ((i>>2)&7)*36;

  2967.                 b= (i&3     )*85;

  2968.             }else if(c->srcFormat == PIX_FMT_BGR8){

  2969.                 b= (i>>6    )*85;

  2970.                 g= ((i>>3)&7)*36;

  2971.                 r= (i&7     )*36;

  2972.             }else if(c->srcFormat == PIX_FMT_RGB4_BYTE){

  2973.                 r= (i>>3    )*255;

  2974.                 g= ((i>>1)&3)*85;

  2975.                 b= (i&1     )*255;

  2976.             }else {

  2977.                 assert(c->srcFormat == PIX_FMT_BGR4_BYTE);

  2978.                 b= (i>>3    )*255;

  2979.                 g= ((i>>1)&3)*85;

  2980.                 r= (i&1     )*255;

  2981.             }

  2982.             y= av_clip_uint8((RY*r + GY*g + BY*b + ( 33<<(RGB2YUV_SHIFT-1)))>>RGB2YUV_SHIFT);

  2983.             u= av_clip_uint8((RU*r + GU*g + BU*b + (257<<(RGB2YUV_SHIFT-1)))>>RGB2YUV_SHIFT);

  2984.             v= av_clip_uint8((RV*r + GV*g + BV*b + (257<<(RGB2YUV_SHIFT-1)))>>RGB2YUV_SHIFT);

  2985.             c->pal_yuv[i]= y + (u<<8) + (v<<16);

  2986. 

  2987. 

  2988.             switch(c->dstFormat) {

  2989.             case PIX_FMT_BGR32:

  2990. #ifndef WORDS_BIGENDIAN

  2991.             case PIX_FMT_RGB24:

  2992. #endif

  2993.                 c->pal_rgb[i]=  r + (g<<8) + (b<<16);

  2994.                 break;

  2995.             case PIX_FMT_BGR32_1:

  2996. #ifdef  WORDS_BIGENDIAN

  2997.             case PIX_FMT_BGR24:

  2998. #endif

  2999.                 c->pal_rgb[i]= (r + (g<<8) + (b<<16)) << 8;

  3000.                 break;

  3001.             case PIX_FMT_RGB32_1:

  3002. #ifdef  WORDS_BIGENDIAN

  3003.             case PIX_FMT_RGB24:

  3004. #endif

  3005.                 c->pal_rgb[i]= (b + (g<<8) + (r<<16)) << 8;

  3006.                 break;

  3007.             case PIX_FMT_RGB32:

  3008. #ifndef WORDS_BIGENDIAN

  3009.             case PIX_FMT_BGR24:

  3010. #endif

  3011.             default:

  3012.                 c->pal_rgb[i]=  b + (g<<8) + (r<<16);

  3013.             }

  3014.         }

  3015.     }

  3016. 

  3017.     // copy strides, so they can safely be modified

  3018.     if (c->sliceDir == 1) {

  3019.         // slices go from top to bottom

  3020.         int srcStride2[4]= {srcStride[0], srcStride[1], srcStride[2], srcStride[3]};

  3021.         int dstStride2[4]= {dstStride[0], dstStride[1], dstStride[2], dstStride[3]};

  3022. 

  3023.         reset_ptr(src2, c->srcFormat);

  3024.         reset_ptr(dst2, c->dstFormat);

  3025. 

  3026.         return c->swScale(c, src2, srcStride2, srcSliceY, srcSliceH, dst2, dstStride2);

  3027.     } else {

  3028.         // slices go from bottom to top => we flip the image internally

  3029.         int srcStride2[4]= {-srcStride[0], -srcStride[1], -srcStride[2], -srcStride[3]};

  3030.         int dstStride2[4]= {-dstStride[0], -dstStride[1], -dstStride[2], -dstStride[3]};

  3031. 

  3032.         src2[0] += (srcSliceH-1)*srcStride[0];

  3033.         if (!usePal(c->srcFormat))

  3034.             src2[1] += ((srcSliceH>>c->chrSrcVSubSample)-1)*srcStride[1];

  3035.         src2[2] += ((srcSliceH>>c->chrSrcVSubSample)-1)*srcStride[2];

  3036.         src2[3] += (srcSliceH-1)*srcStride[3];

  3037.         dst2[0] += ( c->dstH                      -1)*dstStride[0];

  3038.         dst2[1] += ((c->dstH>>c->chrDstVSubSample)-1)*dstStride[1];

  3039.         dst2[2] += ((c->dstH>>c->chrDstVSubSample)-1)*dstStride[2];

  3040.         dst2[3] += ( c->dstH                      -1)*dstStride[3];

  3041. 

  3042.         reset_ptr(src2, c->srcFormat);

  3043.         reset_ptr(dst2, c->dstFormat);

  3044. 

  3045.         return c->swScale(c, src2, srcStride2, c->srcH-srcSliceY-srcSliceH, srcSliceH, dst2, dstStride2);

  3046.     }

  3047. }

  3048. 

  3049. #if LIBSWSCALE_VERSION_MAJOR < 1

  3050. int sws_scale_ordered(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  3051.                       int srcSliceH, uint8_t* dst[], int dstStride[]){

  3052.     return sws_scale(c, src, srcStride, srcSliceY, srcSliceH, dst, dstStride);

  3053. }

  3054. #endif

  3055. 

  3056. SwsFilter *sws_getDefaultFilter(float lumaGBlur, float chromaGBlur,

  3057.                                 float lumaSharpen, float chromaSharpen,

  3058.                                 float chromaHShift, float chromaVShift,

  3059.                                 int verbose)

  3060. {

  3061.     SwsFilter *filter= av_malloc(sizeof(SwsFilter));

  3062. 

  3063.     if (lumaGBlur!=0.0){

  3064.         filter->lumH= sws_getGaussianVec(lumaGBlur, 3.0);

  3065.         filter->lumV= sws_getGaussianVec(lumaGBlur, 3.0);

  3066.     }else{

  3067.         filter->lumH= sws_getIdentityVec();

  3068.         filter->lumV= sws_getIdentityVec();

  3069.     }

  3070. 

  3071.     if (chromaGBlur!=0.0){

  3072.         filter->chrH= sws_getGaussianVec(chromaGBlur, 3.0);

  3073.         filter->chrV= sws_getGaussianVec(chromaGBlur, 3.0);

  3074.     }else{

  3075.         filter->chrH= sws_getIdentityVec();

  3076.         filter->chrV= sws_getIdentityVec();

  3077.     }

  3078. 

  3079.     if (chromaSharpen!=0.0){

  3080.         SwsVector *id= sws_getIdentityVec();

  3081.         sws_scaleVec(filter->chrH, -chromaSharpen);

  3082.         sws_scaleVec(filter->chrV, -chromaSharpen);

  3083.         sws_addVec(filter->chrH, id);

  3084.         sws_addVec(filter->chrV, id);

  3085.         sws_freeVec(id);

  3086.     }

  3087. 

  3088.     if (lumaSharpen!=0.0){

  3089.         SwsVector *id= sws_getIdentityVec();

  3090.         sws_scaleVec(filter->lumH, -lumaSharpen);

  3091.         sws_scaleVec(filter->lumV, -lumaSharpen);

  3092.         sws_addVec(filter->lumH, id);

  3093.         sws_addVec(filter->lumV, id);

  3094.         sws_freeVec(id);

  3095.     }

  3096. 

  3097.     if (chromaHShift != 0.0)

  3098.         sws_shiftVec(filter->chrH, (int)(chromaHShift+0.5));

  3099. 

  3100.     if (chromaVShift != 0.0)

  3101.         sws_shiftVec(filter->chrV, (int)(chromaVShift+0.5));

  3102. 

  3103.     sws_normalizeVec(filter->chrH, 1.0);

  3104.     sws_normalizeVec(filter->chrV, 1.0);

  3105.     sws_normalizeVec(filter->lumH, 1.0);

  3106.     sws_normalizeVec(filter->lumV, 1.0);

  3107. 

  3108.     if (verbose) sws_printVec2(filter->chrH, NULL, AV_LOG_DEBUG);

  3109.     if (verbose) sws_printVec2(filter->lumH, NULL, AV_LOG_DEBUG);

  3110. 

  3111.     return filter;

  3112. }

  3113. 

  3114. SwsVector *sws_getGaussianVec(double variance, double quality){

  3115.     const int length= (int)(variance*quality + 0.5) | 1;

  3116.     int i;

  3117.     double *coeff= av_malloc(length*sizeof(double));

  3118.     double middle= (length-1)*0.5;

  3119.     SwsVector *vec= av_malloc(sizeof(SwsVector));

  3120. 

  3121.     vec->coeff= coeff;

  3122.     vec->length= length;

  3123. 

  3124.     for (i=0; i<length; i++)

  3125.     {

  3126.         double dist= i-middle;

  3127.         coeff[i]= exp(-dist*dist/(2*variance*variance)) / sqrt(2*variance*PI);

  3128.     }

  3129. 

  3130.     sws_normalizeVec(vec, 1.0);

  3131. 

  3132.     return vec;

  3133. }

  3134. 

  3135. SwsVector *sws_getConstVec(double c, int length){

  3136.     int i;

  3137.     double *coeff= av_malloc(length*sizeof(double));

  3138.     SwsVector *vec= av_malloc(sizeof(SwsVector));

  3139. 

  3140.     vec->coeff= coeff;

  3141.     vec->length= length;

  3142. 

  3143.     for (i=0; i<length; i++)

  3144.         coeff[i]= c;

  3145. 

  3146.     return vec;

  3147. }

  3148. 

  3149. 

  3150. SwsVector *sws_getIdentityVec(void){

  3151.     return sws_getConstVec(1.0, 1);

  3152. }

  3153. 

  3154. double sws_dcVec(SwsVector *a){

  3155.     int i;

  3156.     double sum=0;

  3157. 

  3158.     for (i=0; i<a->length; i++)

  3159.         sum+= a->coeff[i];

  3160. 

  3161.     return sum;

  3162. }

  3163. 

  3164. void sws_scaleVec(SwsVector *a, double scalar){

  3165.     int i;

  3166. 

  3167.     for (i=0; i<a->length; i++)

  3168.         a->coeff[i]*= scalar;

  3169. }

  3170. 

  3171. void sws_normalizeVec(SwsVector *a, double height){

  3172.     sws_scaleVec(a, height/sws_dcVec(a));

  3173. }

  3174. 

  3175. static SwsVector *sws_getConvVec(SwsVector *a, SwsVector *b){

  3176.     int length= a->length + b->length - 1;

  3177.     double *coeff= av_malloc(length*sizeof(double));

  3178.     int i, j;

  3179.     SwsVector *vec= av_malloc(sizeof(SwsVector));

  3180. 

  3181.     vec->coeff= coeff;

  3182.     vec->length= length;

  3183. 

  3184.     for (i=0; i<length; i++) coeff[i]= 0.0;

  3185. 

  3186.     for (i=0; i<a->length; i++)

  3187.     {

  3188.         for (j=0; j<b->length; j++)

  3189.         {

  3190.             coeff[i+j]+= a->coeff[i]*b->coeff[j];

  3191.         }

  3192.     }

  3193. 

  3194.     return vec;

  3195. }

  3196. 

  3197. static SwsVector *sws_sumVec(SwsVector *a, SwsVector *b){

  3198.     int length= FFMAX(a->length, b->length);

  3199.     double *coeff= av_malloc(length*sizeof(double));

  3200.     int i;

  3201.     SwsVector *vec= av_malloc(sizeof(SwsVector));

  3202. 

  3203.     vec->coeff= coeff;

  3204.     vec->length= length;

  3205. 

  3206.     for (i=0; i<length; i++) coeff[i]= 0.0;

  3207. 

  3208.     for (i=0; i<a->length; i++) coeff[i + (length-1)/2 - (a->length-1)/2]+= a->coeff[i];

  3209.     for (i=0; i<b->length; i++) coeff[i + (length-1)/2 - (b->length-1)/2]+= b->coeff[i];

  3210. 

  3211.     return vec;

  3212. }

  3213. 

  3214. static SwsVector *sws_diffVec(SwsVector *a, SwsVector *b){

  3215.     int length= FFMAX(a->length, b->length);

  3216.     double *coeff= av_malloc(length*sizeof(double));

  3217.     int i;

  3218.     SwsVector *vec= av_malloc(sizeof(SwsVector));

  3219. 

  3220.     vec->coeff= coeff;

  3221.     vec->length= length;

  3222. 

  3223.     for (i=0; i<length; i++) coeff[i]= 0.0;

  3224. 

  3225.     for (i=0; i<a->length; i++) coeff[i + (length-1)/2 - (a->length-1)/2]+= a->coeff[i];

  3226.     for (i=0; i<b->length; i++) coeff[i + (length-1)/2 - (b->length-1)/2]-= b->coeff[i];

  3227. 

  3228.     return vec;

  3229. }

  3230. 

  3231. /* shift left / or right if "shift" is negative */

  3232. static SwsVector *sws_getShiftedVec(SwsVector *a, int shift){

  3233.     int length= a->length + FFABS(shift)*2;

  3234.     double *coeff= av_malloc(length*sizeof(double));

  3235.     int i;

  3236.     SwsVector *vec= av_malloc(sizeof(SwsVector));

  3237. 

  3238.     vec->coeff= coeff;

  3239.     vec->length= length;

  3240. 

  3241.     for (i=0; i<length; i++) coeff[i]= 0.0;

  3242. 

  3243.     for (i=0; i<a->length; i++)

  3244.     {

  3245.         coeff[i + (length-1)/2 - (a->length-1)/2 - shift]= a->coeff[i];

  3246.     }

  3247. 

  3248.     return vec;

  3249. }

  3250. 

  3251. void sws_shiftVec(SwsVector *a, int shift){

  3252.     SwsVector *shifted= sws_getShiftedVec(a, shift);

  3253.     av_free(a->coeff);

  3254.     a->coeff= shifted->coeff;

  3255.     a->length= shifted->length;

  3256.     av_free(shifted);

  3257. }

  3258. 

  3259. void sws_addVec(SwsVector *a, SwsVector *b){

  3260.     SwsVector *sum= sws_sumVec(a, b);

  3261.     av_free(a->coeff);

  3262.     a->coeff= sum->coeff;

  3263.     a->length= sum->length;

  3264.     av_free(sum);

  3265. }

  3266. 

  3267. void sws_subVec(SwsVector *a, SwsVector *b){

  3268.     SwsVector *diff= sws_diffVec(a, b);

  3269.     av_free(a->coeff);

  3270.     a->coeff= diff->coeff;

  3271.     a->length= diff->length;

  3272.     av_free(diff);

  3273. }

  3274. 

  3275. void sws_convVec(SwsVector *a, SwsVector *b){

  3276.     SwsVector *conv= sws_getConvVec(a, b);

  3277.     av_free(a->coeff);

  3278.     a->coeff= conv->coeff;

  3279.     a->length= conv->length;

  3280.     av_free(conv);

  3281. }

  3282. 

  3283. SwsVector *sws_cloneVec(SwsVector *a){

  3284.     double *coeff= av_malloc(a->length*sizeof(double));

  3285.     int i;

  3286.     SwsVector *vec= av_malloc(sizeof(SwsVector));

  3287. 

  3288.     vec->coeff= coeff;

  3289.     vec->length= a->length;

  3290. 

  3291.     for (i=0; i<a->length; i++) coeff[i]= a->coeff[i];

  3292. 

  3293.     return vec;

  3294. }

  3295. 

  3296. void sws_printVec2(SwsVector *a, AVClass *log_ctx, int log_level){

  3297.     int i;

  3298.     double max=0;

  3299.     double min=0;

  3300.     double range;

  3301. 

  3302.     for (i=0; i<a->length; i++)

  3303.         if (a->coeff[i]>max) max= a->coeff[i];

  3304. 

  3305.     for (i=0; i<a->length; i++)

  3306.         if (a->coeff[i]<min) min= a->coeff[i];

  3307. 

  3308.     range= max - min;

  3309. 

  3310.     for (i=0; i<a->length; i++)

  3311.     {

  3312.         int x= (int)((a->coeff[i]-min)*60.0/range +0.5);

  3313.         av_log(log_ctx, log_level, "%1.3f ", a->coeff[i]);

  3314.         for (;x>0; x--) av_log(log_ctx, log_level, " ");

  3315.         av_log(log_ctx, log_level, "|\n");

  3316.     }

  3317. }

  3318. 

  3319. #if LIBSWSCALE_VERSION_MAJOR < 1

  3320. void sws_printVec(SwsVector *a){

  3321.     sws_printVec2(a, NULL, AV_LOG_DEBUG);

  3322. }

  3323. #endif

  3324. 

  3325. void sws_freeVec(SwsVector *a){

  3326.     if (!a) return;

  3327.     av_freep(&a->coeff);

  3328.     a->length=0;

  3329.     av_free(a);

  3330. }

  3331. 

  3332. void sws_freeFilter(SwsFilter *filter){

  3333.     if (!filter) return;

  3334. 

  3335.     if (filter->lumH) sws_freeVec(filter->lumH);

  3336.     if (filter->lumV) sws_freeVec(filter->lumV);

  3337.     if (filter->chrH) sws_freeVec(filter->chrH);

  3338.     if (filter->chrV) sws_freeVec(filter->chrV);

  3339.     av_free(filter);

  3340. }

  3341. 

  3342. 

  3343. void sws_freeContext(SwsContext *c){

  3344.     int i;

  3345.     if (!c) return;

  3346. 

  3347.     if (c->lumPixBuf)

  3348.     {

  3349.         for (i=0; i<c->vLumBufSize; i++)

  3350.             av_freep(&c->lumPixBuf[i]);

  3351.         av_freep(&c->lumPixBuf);

  3352.     }

  3353. 

  3354.     if (c->chrPixBuf)

  3355.     {

  3356.         for (i=0; i<c->vChrBufSize; i++)

  3357.             av_freep(&c->chrPixBuf[i]);

  3358.         av_freep(&c->chrPixBuf);

  3359.     }

  3360. 

  3361.     if (CONFIG_SWSCALE_ALPHA && c->alpPixBuf){

  3362.         for (i=0; i<c->vLumBufSize; i++)

  3363.             av_freep(&c->alpPixBuf[i]);

  3364.         av_freep(&c->alpPixBuf);

  3365.     }

  3366. 

  3367.     av_freep(&c->vLumFilter);

  3368.     av_freep(&c->vChrFilter);

  3369.     av_freep(&c->hLumFilter);

  3370.     av_freep(&c->hChrFilter);

  3371. #if HAVE_ALTIVEC

  3372.     av_freep(&c->vYCoeffsBank);

  3373.     av_freep(&c->vCCoeffsBank);

  3374. #endif

  3375. 

  3376.     av_freep(&c->vLumFilterPos);

  3377.     av_freep(&c->vChrFilterPos);

  3378.     av_freep(&c->hLumFilterPos);

  3379.     av_freep(&c->hChrFilterPos);

  3380. 

  3381. #if ARCH_X86 && CONFIG_GPL

  3382. #ifdef MAP_ANONYMOUS

  3383.     if (c->funnyYCode ) munmap(c->funnyYCode , MAX_FUNNY_CODE_SIZE);

  3384.     if (c->funnyUVCode) munmap(c->funnyUVCode, MAX_FUNNY_CODE_SIZE);

  3385. #elif HAVE_VIRTUALALLOC

  3386.     if (c->funnyYCode ) VirtualFree(c->funnyYCode , MAX_FUNNY_CODE_SIZE, MEM_RELEASE);

  3387.     if (c->funnyUVCode) VirtualFree(c->funnyUVCode, MAX_FUNNY_CODE_SIZE, MEM_RELEASE);

  3388. #else

  3389.     av_free(c->funnyYCode );

  3390.     av_free(c->funnyUVCode);

  3391. #endif

  3392.     c->funnyYCode=NULL;

  3393.     c->funnyUVCode=NULL;

  3394. #endif /* ARCH_X86 && CONFIG_GPL */

  3395. 

  3396.     av_freep(&c->lumMmx2Filter);

  3397.     av_freep(&c->chrMmx2Filter);

  3398.     av_freep(&c->lumMmx2FilterPos);

  3399.     av_freep(&c->chrMmx2FilterPos);

  3400.     av_freep(&c->yuvTable);

  3401. 

  3402.     av_free(c);

  3403. }

  3404. 

  3405. struct SwsContext *sws_getCachedContext(struct SwsContext *context,

  3406.                                         int srcW, int srcH, enum PixelFormat srcFormat,

  3407.                                         int dstW, int dstH, enum PixelFormat dstFormat, int flags,

  3408.                                         SwsFilter *srcFilter, SwsFilter *dstFilter, const double *param)

  3409. {

  3410.     static const double default_param[2] = {SWS_PARAM_DEFAULT, SWS_PARAM_DEFAULT};

  3411. 

  3412.     if (!param)

  3413.         param = default_param;

  3414. 

  3415.     if (context) {

  3416.         if (context->srcW != srcW || context->srcH != srcH ||

  3417.             context->srcFormat != srcFormat ||

  3418.             context->dstW != dstW || context->dstH != dstH ||

  3419.             context->dstFormat != dstFormat || context->flags != flags ||

  3420.             context->param[0] != param[0] || context->param[1] != param[1])

  3421.         {

  3422.             sws_freeContext(context);

  3423.             context = NULL;

  3424.         }

  3425.     }

  3426.     if (!context) {

  3427.         return sws_getContext(srcW, srcH, srcFormat,

  3428.                               dstW, dstH, dstFormat, flags,

  3429.                               srcFilter, dstFilter, param);

  3430.     }

  3431.     return context;

  3432. }