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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 "config.h"

  63. #include <assert.h>

  64. #if HAVE_SYS_MMAN_H

  65. #include <sys/mman.h>

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

  67. #define MAP_ANONYMOUS MAP_ANON

  68. #endif

  69. #endif

  70. #if HAVE_VIRTUALALLOC

  71. #define WIN32_LEAN_AND_MEAN

  72. #include <windows.h>

  73. #endif

  74. #include "swscale.h"

  75. #include "swscale_internal.h"

  76. #include "rgb2rgb.h"

  77. #include "libavutil/intreadwrite.h"

  78. #include "libavutil/x86_cpu.h"

  79. #include "libavutil/avutil.h"

  80. #include "libavutil/bswap.h"

  81. #include "libavutil/pixdesc.h"

  82. 

  83. unsigned swscale_version(void)

  84. {

  85.     return LIBSWSCALE_VERSION_INT;

  86. }

  87. 

  88. const char *swscale_configuration(void)

  89. {

  90.     return FFMPEG_CONFIGURATION;

  91. }

  92. 

  93. const char *swscale_license(void)

  94. {

  95. #define LICENSE_PREFIX "libswscale license: "

  96.     return LICENSE_PREFIX FFMPEG_LICENSE + sizeof(LICENSE_PREFIX) - 1;

  97. }

  98. 

  99. #undef MOVNTQ

  100. #undef PAVGB

  101. 

  102. //#undef HAVE_MMX2

  103. //#define HAVE_AMD3DNOW

  104. //#undef HAVE_MMX

  105. //#undef ARCH_X86

  106. #define DITHER1XBPP

  107. 

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

  109. 

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

  111. 

  112. #ifdef M_PI

  113. #define PI M_PI

  114. #else

  115. #define PI 3.14159265358979323846

  116. #endif

  117. 

  118. #define isSupportedIn(x)    (       \

  119.            (x)==PIX_FMT_YUV420P     \

  120.         || (x)==PIX_FMT_YUVA420P    \

  121.         || (x)==PIX_FMT_YUYV422     \

  122.         || (x)==PIX_FMT_UYVY422     \

  123.         || (x)==PIX_FMT_RGB48BE     \

  124.         || (x)==PIX_FMT_RGB48LE     \

  125.         || (x)==PIX_FMT_RGB32       \

  126.         || (x)==PIX_FMT_RGB32_1     \

  127.         || (x)==PIX_FMT_BGR24       \

  128.         || (x)==PIX_FMT_BGR565      \

  129.         || (x)==PIX_FMT_BGR555      \

  130.         || (x)==PIX_FMT_BGR32       \

  131.         || (x)==PIX_FMT_BGR32_1     \

  132.         || (x)==PIX_FMT_RGB24       \

  133.         || (x)==PIX_FMT_RGB565      \

  134.         || (x)==PIX_FMT_RGB555      \

  135.         || (x)==PIX_FMT_GRAY8       \

  136.         || (x)==PIX_FMT_YUV410P     \

  137.         || (x)==PIX_FMT_YUV440P     \

  138.         || (x)==PIX_FMT_NV12        \

  139.         || (x)==PIX_FMT_NV21        \

  140.         || (x)==PIX_FMT_GRAY16BE    \

  141.         || (x)==PIX_FMT_GRAY16LE    \

  142.         || (x)==PIX_FMT_YUV444P     \

  143.         || (x)==PIX_FMT_YUV422P     \

  144.         || (x)==PIX_FMT_YUV411P     \

  145.         || (x)==PIX_FMT_PAL8        \

  146.         || (x)==PIX_FMT_BGR8        \

  147.         || (x)==PIX_FMT_RGB8        \

  148.         || (x)==PIX_FMT_BGR4_BYTE   \

  149.         || (x)==PIX_FMT_RGB4_BYTE   \

  150.         || (x)==PIX_FMT_YUV440P     \

  151.         || (x)==PIX_FMT_MONOWHITE   \

  152.         || (x)==PIX_FMT_MONOBLACK   \

  153.         || (x)==PIX_FMT_YUV420P16LE   \

  154.         || (x)==PIX_FMT_YUV422P16LE   \

  155.         || (x)==PIX_FMT_YUV444P16LE   \

  156.         || (x)==PIX_FMT_YUV420P16BE   \

  157.         || (x)==PIX_FMT_YUV422P16BE   \

  158.         || (x)==PIX_FMT_YUV444P16BE   \

  159.     )

  160. 

  161. int sws_isSupportedInput(enum PixelFormat pix_fmt)

  162. {

  163.     return isSupportedIn(pix_fmt);

  164. }

  165. 

  166. #define isSupportedOut(x)   (       \

  167.            (x)==PIX_FMT_YUV420P     \

  168.         || (x)==PIX_FMT_YUVA420P    \

  169.         || (x)==PIX_FMT_YUYV422     \

  170.         || (x)==PIX_FMT_UYVY422     \

  171.         || (x)==PIX_FMT_YUV444P     \

  172.         || (x)==PIX_FMT_YUV422P     \

  173.         || (x)==PIX_FMT_YUV411P     \

  174.         || isRGB(x)                 \

  175.         || isBGR(x)                 \

  176.         || (x)==PIX_FMT_NV12        \

  177.         || (x)==PIX_FMT_NV21        \

  178.         || (x)==PIX_FMT_GRAY16BE    \

  179.         || (x)==PIX_FMT_GRAY16LE    \

  180.         || (x)==PIX_FMT_GRAY8       \

  181.         || (x)==PIX_FMT_YUV410P     \

  182.         || (x)==PIX_FMT_YUV440P     \

  183.         || (x)==PIX_FMT_YUV420P16LE   \

  184.         || (x)==PIX_FMT_YUV422P16LE   \

  185.         || (x)==PIX_FMT_YUV444P16LE   \

  186.         || (x)==PIX_FMT_YUV420P16BE   \

  187.         || (x)==PIX_FMT_YUV422P16BE   \

  188.         || (x)==PIX_FMT_YUV444P16BE   \

  189.     )

  190. 

  191. int sws_isSupportedOutput(enum PixelFormat pix_fmt)

  192. {

  193.     return isSupportedOut(pix_fmt);

  194. }

  195. 

  196. #define isPacked(x)         (       \

  197.            (x)==PIX_FMT_PAL8        \

  198.         || (x)==PIX_FMT_YUYV422     \

  199.         || (x)==PIX_FMT_UYVY422     \

  200.         || isRGB(x)                 \

  201.         || isBGR(x)                 \

  202.     )

  203. #define usePal(x) (av_pix_fmt_descriptors[x].flags & PIX_FMT_PAL)

  204. 

  205. #define RGB2YUV_SHIFT 15

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

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

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

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

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

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

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

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

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

  215. 

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

  217. 

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

  219.     {0.7152, 0.0722, 0.2126, -0.386, 0.5, -0.115, -0.454, -0.046, 0.5},

  220.     {0.7152, 0.0722, 0.2126, -0.386, 0.5, -0.115, -0.454, -0.046, 0.5},

  221.     {0.587 , 0.114 , 0.299 , -0.331, 0.5, -0.169, -0.419, -0.081, 0.5},

  222.     {0.587 , 0.114 , 0.299 , -0.331, 0.5, -0.169, -0.419, -0.081, 0.5},

  223.     {0.59  , 0.11  , 0.30  , -0.331, 0.5, -0.169, -0.421, -0.079, 0.5}, //FCC

  224.     {0.587 , 0.114 , 0.299 , -0.331, 0.5, -0.169, -0.419, -0.081, 0.5},

  225.     {0.587 , 0.114 , 0.299 , -0.331, 0.5, -0.169, -0.419, -0.081, 0.5}, //SMPTE 170M

  226.     {0.701 , 0.087 , 0.212 , -0.384, 0.5  -0.116, -0.445, -0.055, 0.5}, //SMPTE 240M

  227. };

  228. 

  229. /*

  230. NOTES

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

  232. 

  233. TODO

  234. more intelligent misalignment avoidance for the horizontal scaler

  235. write special vertical cubic upscale version

  236. optimize C code (YV12 / minmax)

  237. add support for packed pixel YUV input & output

  238. add support for Y8 output

  239. optimize BGR24 & BGR32

  240. add BGR4 output support

  241. write special BGR->BGR scaler

  242. */

  243. 

  244. #if ARCH_X86 && CONFIG_GPL

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

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

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

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

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

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

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

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

  253. 

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

  255.         0x0103010301030103LL,

  256.         0x0200020002000200LL,};

  257. 

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

  259.         0x0602060206020602LL,

  260.         0x0004000400040004LL,};

  261. 

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

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

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

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

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

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

  268. 

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

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

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

  272. 

  273. #ifdef FAST_BGR2YV12

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

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

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

  277. #else

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

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

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

  281. #endif /* FAST_BGR2YV12 */

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

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

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

  285. 

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

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

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

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

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

  291. 

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

  293.     {0x38380000DAC83838ULL, 0xECFFDAC80000ECFFULL, 0xF6E40000D0E3F6E4ULL, 0x3838D0E300003838ULL},

  294.     {0xECFF0000DAC8ECFFULL, 0x3838DAC800003838ULL, 0x38380000D0E33838ULL, 0xF6E4D0E30000F6E4ULL},

  295. };

  296. 

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

  298. 

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

  300. 

  301. DECLARE_ALIGNED(8, static const uint8_t, dither_2x2_4[2][8])={

  302. {  1,   3,   1,   3,   1,   3,   1,   3, },

  303. {  2,   0,   2,   0,   2,   0,   2,   0, },

  304. };

  305. 

  306. DECLARE_ALIGNED(8, static const uint8_t, dither_2x2_8[2][8])={

  307. {  6,   2,   6,   2,   6,   2,   6,   2, },

  308. {  0,   4,   0,   4,   0,   4,   0,   4, },

  309. };

  310. 

  311. DECLARE_ALIGNED(8, const uint8_t, dither_8x8_32[8][8])={

  312. { 17,   9,  23,  15,  16,   8,  22,  14, },

  313. {  5,  29,   3,  27,   4,  28,   2,  26, },

  314. { 21,  13,  19,  11,  20,  12,  18,  10, },

  315. {  0,  24,   6,  30,   1,  25,   7,  31, },

  316. { 16,   8,  22,  14,  17,   9,  23,  15, },

  317. {  4,  28,   2,  26,   5,  29,   3,  27, },

  318. { 20,  12,  18,  10,  21,  13,  19,  11, },

  319. {  1,  25,   7,  31,   0,  24,   6,  30, },

  320. };

  321. 

  322. DECLARE_ALIGNED(8, const uint8_t, dither_8x8_73[8][8])={

  323. {  0,  55,  14,  68,   3,  58,  17,  72, },

  324. { 37,  18,  50,  32,  40,  22,  54,  35, },

  325. {  9,  64,   5,  59,  13,  67,   8,  63, },

  326. { 46,  27,  41,  23,  49,  31,  44,  26, },

  327. {  2,  57,  16,  71,   1,  56,  15,  70, },

  328. { 39,  21,  52,  34,  38,  19,  51,  33, },

  329. { 11,  66,   7,  62,  10,  65,   6,  60, },

  330. { 48,  30,  43,  25,  47,  29,  42,  24, },

  331. };

  332. 

  333. #if 1

  334. DECLARE_ALIGNED(8, const uint8_t, dither_8x8_220[8][8])={

  335. {117,  62, 158, 103, 113,  58, 155, 100, },

  336. { 34, 199,  21, 186,  31, 196,  17, 182, },

  337. {144,  89, 131,  76, 141,  86, 127,  72, },

  338. {  0, 165,  41, 206,  10, 175,  52, 217, },

  339. {110,  55, 151,  96, 120,  65, 162, 107, },

  340. { 28, 193,  14, 179,  38, 203,  24, 189, },

  341. {138,  83, 124,  69, 148,  93, 134,  79, },

  342. {  7, 172,  48, 213,   3, 168,  45, 210, },

  343. };

  344. #elif 1

  345. // tries to correct a gamma of 1.5

  346. DECLARE_ALIGNED(8, const uint8_t, dither_8x8_220[8][8])={

  347. {  0, 143,  18, 200,   2, 156,  25, 215, },

  348. { 78,  28, 125,  64,  89,  36, 138,  74, },

  349. { 10, 180,   3, 161,  16, 195,   8, 175, },

  350. {109,  51,  93,  38, 121,  60, 105,  47, },

  351. {  1, 152,  23, 210,   0, 147,  20, 205, },

  352. { 85,  33, 134,  71,  81,  30, 130,  67, },

  353. { 14, 190,   6, 171,  12, 185,   5, 166, },

  354. {117,  57, 101,  44, 113,  54,  97,  41, },

  355. };

  356. #elif 1

  357. // tries to correct a gamma of 2.0

  358. DECLARE_ALIGNED(8, const uint8_t, dither_8x8_220[8][8])={

  359. {  0, 124,   8, 193,   0, 140,  12, 213, },

  360. { 55,  14, 104,  42,  66,  19, 119,  52, },

  361. {  3, 168,   1, 145,   6, 187,   3, 162, },

  362. { 86,  31,  70,  21,  99,  39,  82,  28, },

  363. {  0, 134,  11, 206,   0, 129,   9, 200, },

  364. { 62,  17, 114,  48,  58,  16, 109,  45, },

  365. {  5, 181,   2, 157,   4, 175,   1, 151, },

  366. { 95,  36,  78,  26,  90,  34,  74,  24, },

  367. };

  368. #else

  369. // tries to correct a gamma of 2.5

  370. DECLARE_ALIGNED(8, const uint8_t, dither_8x8_220[8][8])={

  371. {  0, 107,   3, 187,   0, 125,   6, 212, },

  372. { 39,   7,  86,  28,  49,  11, 102,  36, },

  373. {  1, 158,   0, 131,   3, 180,   1, 151, },

  374. { 68,  19,  52,  12,  81,  25,  64,  17, },

  375. {  0, 119,   5, 203,   0, 113,   4, 195, },

  376. { 45,   9,  96,  33,  42,   8,  91,  30, },

  377. {  2, 172,   1, 144,   2, 165,   0, 137, },

  378. { 77,  23,  60,  15,  72,  21,  56,  14, },

  379. };

  380. #endif

  381. 

  382. const char *sws_format_name(enum PixelFormat format)

  383. {

  384.     if ((unsigned)format < PIX_FMT_NB && av_pix_fmt_descriptors[format].name)

  385.         return av_pix_fmt_descriptors[format].name;

  386.     else

  387.         return "Unknown format";

  388. }

  389. 

  390. static av_always_inline void yuv2yuvX16inC_template(const int16_t *lumFilter, const int16_t **lumSrc, int lumFilterSize,

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

  392.                                                     const int16_t **alpSrc, uint16_t *dest, uint16_t *uDest, uint16_t *vDest, uint16_t *aDest,

  393.                                                     int dstW, int chrDstW, int big_endian)

  394. {

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

  396.     int i;

  397. 

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

  399.         int val = 1 << 10;

  400.         int j;

  401. 

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

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

  404. 

  405.         if (big_endian) {

  406.             AV_WB16(&dest[i], av_clip_uint16(val >> 11));

  407.         } else {

  408.             AV_WL16(&dest[i], av_clip_uint16(val >> 11));

  409.         }

  410.     }

  411. 

  412.     if (uDest) {

  413.         for (i = 0; i < chrDstW; i++) {

  414.             int u = 1 << 10;

  415.             int v = 1 << 10;

  416.             int j;

  417. 

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

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

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

  421.             }

  422. 

  423.             if (big_endian) {

  424.                 AV_WB16(&uDest[i], av_clip_uint16(u >> 11));

  425.                 AV_WB16(&vDest[i], av_clip_uint16(v >> 11));

  426.             } else {

  427.                 AV_WL16(&uDest[i], av_clip_uint16(u >> 11));

  428.                 AV_WL16(&vDest[i], av_clip_uint16(v >> 11));

  429.             }

  430.         }

  431.     }

  432. 

  433.     if (CONFIG_SWSCALE_ALPHA && aDest) {

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

  435.             int val = 1 << 10;

  436.             int j;

  437. 

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

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

  440. 

  441.             if (big_endian) {

  442.                 AV_WB16(&aDest[i], av_clip_uint16(val >> 11));

  443.             } else {

  444.                 AV_WL16(&aDest[i], av_clip_uint16(val >> 11));

  445.             }

  446.         }

  447.     }

  448. }

  449. 

  450. static inline void yuv2yuvX16inC(const int16_t *lumFilter, const int16_t **lumSrc, int lumFilterSize,

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

  452.                                  const int16_t **alpSrc, uint16_t *dest, uint16_t *uDest, uint16_t *vDest, uint16_t *aDest, int dstW, int chrDstW,

  453.                                  enum PixelFormat dstFormat)

  454. {

  455.     if (isBE(dstFormat)) {

  456.         yuv2yuvX16inC_template(lumFilter, lumSrc, lumFilterSize,

  457.                                chrFilter, chrSrc, chrFilterSize,

  458.                                alpSrc,

  459.                                dest, uDest, vDest, aDest,

  460.                                dstW, chrDstW, 1);

  461.     } else {

  462.         yuv2yuvX16inC_template(lumFilter, lumSrc, lumFilterSize,

  463.                                chrFilter, chrSrc, chrFilterSize,

  464.                                alpSrc,

  465.                                dest, uDest, vDest, aDest,

  466.                                dstW, chrDstW, 0);

  467.     }

  468. }

  469. 

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

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

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

  473. {

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

  475.     int i;

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

  477.         int val=1<<18;

  478.         int j;

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

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

  481. 

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

  483.     }

  484. 

  485.     if (uDest)

  486.         for (i=0; i<chrDstW; i++) {

  487.             int u=1<<18;

  488.             int v=1<<18;

  489.             int j;

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

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

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

  493.             }

  494. 

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

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

  497.         }

  498. 

  499.     if (CONFIG_SWSCALE_ALPHA && aDest)

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

  501.             int val=1<<18;

  502.             int j;

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

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

  505. 

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

  507.         }

  508. 

  509. }

  510. 

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

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

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

  514. {

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

  516.     int i;

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

  518.         int val=1<<18;

  519.         int j;

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

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

  522. 

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

  524.     }

  525. 

  526.     if (!uDest)

  527.         return;

  528. 

  529.     if (dstFormat == PIX_FMT_NV12)

  530.         for (i=0; i<chrDstW; i++) {

  531.             int u=1<<18;

  532.             int v=1<<18;

  533.             int j;

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

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

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

  537.             }

  538. 

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

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

  541.         }

  542.     else

  543.         for (i=0; i<chrDstW; i++) {

  544.             int u=1<<18;

  545.             int v=1<<18;

  546.             int j;

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

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

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

  550.             }

  551. 

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

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

  554.         }

  555. }

  556. 

  557. #define YSCALE_YUV_2_PACKEDX_NOCLIP_C(type,alpha) \

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

  559.         int j;\

  560.         int Y1 = 1<<18;\

  561.         int Y2 = 1<<18;\

  562.         int U  = 1<<18;\

  563.         int V  = 1<<18;\

  564.         int av_unused A1, A2;\

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

  566.         const int i2= 2*i;\

  567.         \

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

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

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

  571.         }\

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

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

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

  575.         }\

  576.         Y1>>=19;\

  577.         Y2>>=19;\

  578.         U >>=19;\

  579.         V >>=19;\

  580.         if (alpha) {\

  581.             A1 = 1<<18;\

  582.             A2 = 1<<18;\

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

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

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

  586.             }\

  587.             A1>>=19;\

  588.             A2>>=19;\

  589.         }

  590. 

  591. #define YSCALE_YUV_2_PACKEDX_C(type,alpha) \

  592.         YSCALE_YUV_2_PACKEDX_NOCLIP_C(type,alpha)\

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

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

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

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

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

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

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

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

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

  602.         }\

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

  604.             A1=av_clip_uint8(A1);\

  605.             A2=av_clip_uint8(A2);\

  606.         }

  607. 

  608. #define YSCALE_YUV_2_PACKEDX_FULL_C(rnd,alpha) \

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

  610.         int j;\

  611.         int Y = 0;\

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

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

  614.         int av_unused A;\

  615.         int R,G,B;\

  616.         \

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

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

  619.         }\

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

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

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

  623.         }\

  624.         Y >>=10;\

  625.         U >>=10;\

  626.         V >>=10;\

  627.         if (alpha) {\

  628.             A = rnd;\

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

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

  631.             A >>=19;\

  632.             if (A&256)\

  633.                 A = av_clip_uint8(A);\

  634.         }

  635. 

  636. #define YSCALE_YUV_2_RGBX_FULL_C(rnd,alpha) \

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

  638.         Y-= c->yuv2rgb_y_offset;\

  639.         Y*= c->yuv2rgb_y_coeff;\

  640.         Y+= rnd;\

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

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

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

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

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

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

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

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

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

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

  651.         }

  652. 

  653. #define YSCALE_YUV_2_GRAY16_C \

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

  655.         int j;\

  656.         int Y1 = 1<<18;\

  657.         int Y2 = 1<<18;\

  658.         int U  = 1<<18;\

  659.         int V  = 1<<18;\

  660.         \

  661.         const int i2= 2*i;\

  662.         \

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

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

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

  666.         }\

  667.         Y1>>=11;\

  668.         Y2>>=11;\

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

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

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

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

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

  674.         }

  675. 

  676. #define YSCALE_YUV_2_RGBX_C(type,alpha) \

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

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

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

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

  681. 

  682. #define YSCALE_YUV_2_PACKED2_C(type,alpha)   \

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

  684.         const int i2= 2*i;       \

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

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

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

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

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

  690.         int av_unused A1, A2;                                         \

  691.         if (alpha) {\

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

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

  694.         }

  695. 

  696. #define YSCALE_YUV_2_GRAY16_2_C   \

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

  698.         const int i2= 2*i;       \

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

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

  701. 

  702. #define YSCALE_YUV_2_RGB2_C(type,alpha) \

  703.     YSCALE_YUV_2_PACKED2_C(type,alpha)\

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

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

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

  707. 

  708. #define YSCALE_YUV_2_PACKED1_C(type,alpha) \

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

  710.         const int i2= 2*i;\

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

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

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

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

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

  716.         int av_unused A1, A2;\

  717.         if (alpha) {\

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

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

  720.         }

  721. 

  722. #define YSCALE_YUV_2_GRAY16_1_C \

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

  724.         const int i2= 2*i;\

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

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

  727. 

  728. #define YSCALE_YUV_2_RGB1_C(type,alpha) \

  729.     YSCALE_YUV_2_PACKED1_C(type,alpha)\

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

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

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

  733. 

  734. #define YSCALE_YUV_2_PACKED1B_C(type,alpha) \

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

  736.         const int i2= 2*i;\

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

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

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

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

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

  742.         int av_unused A1, A2;\

  743.         if (alpha) {\

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

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

  746.         }

  747. 

  748. #define YSCALE_YUV_2_RGB1B_C(type,alpha) \

  749.     YSCALE_YUV_2_PACKED1B_C(type,alpha)\

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

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

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

  753. 

  754. #define YSCALE_YUV_2_MONO2_C \

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

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

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

  758.         int acc;\

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

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

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

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

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

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

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

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

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

  768.         dest++;\

  769.     }

  770. 

  771. #define YSCALE_YUV_2_MONOX_C \

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

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

  774.     int acc=0;\

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

  776.         int j;\

  777.         int Y1=1<<18;\

  778.         int Y2=1<<18;\

  779. \

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

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

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

  783.         }\

  784.         Y1>>=19;\

  785.         Y2>>=19;\

  786.         if ((Y1|Y2)&256) {\

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

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

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

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

  791.         }\

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

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

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

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

  796.             dest++;\

  797.         }\

  798.     }

  799. 

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

  801.     switch(c->dstFormat) {\

  802.     case PIX_FMT_RGB48BE:\

  803.     case PIX_FMT_RGB48LE:\

  804.         func(uint8_t,0)\

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

  806.             ((uint8_t*)dest)[ 1]= r[Y1];\

  807.             ((uint8_t*)dest)[ 2]= g[Y1];\

  808.             ((uint8_t*)dest)[ 3]= g[Y1];\

  809.             ((uint8_t*)dest)[ 4]= b[Y1];\

  810.             ((uint8_t*)dest)[ 5]= b[Y1];\

  811.             ((uint8_t*)dest)[ 6]= r[Y2];\

  812.             ((uint8_t*)dest)[ 7]= r[Y2];\

  813.             ((uint8_t*)dest)[ 8]= g[Y2];\

  814.             ((uint8_t*)dest)[ 9]= g[Y2];\

  815.             ((uint8_t*)dest)[10]= b[Y2];\

  816.             ((uint8_t*)dest)[11]= b[Y2];\

  817.             dest+=12;\

  818.         }\

  819.         break;\

  820.     case PIX_FMT_RGBA:\

  821.     case PIX_FMT_BGRA:\

  822.         if (CONFIG_SMALL) {\

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

  824.             func(uint32_t,needAlpha)\

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

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

  827.             }\

  828.         } else {\

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

  830.                 func(uint32_t,1)\

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

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

  833.                 }\

  834.             } else {\

  835.                 func(uint32_t,0)\

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

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

  838.                 }\

  839.             }\

  840.         }\

  841.         break;\

  842.     case PIX_FMT_ARGB:\

  843.     case PIX_FMT_ABGR:\

  844.         if (CONFIG_SMALL) {\

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

  846.             func(uint32_t,needAlpha)\

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

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

  849.             }\

  850.         } else {\

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

  852.                 func(uint32_t,1)\

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

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

  855.                 }\

  856.             } else {\

  857.                 func(uint32_t,0)\

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

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

  860.                 }\

  861.             }\

  862.         }                \

  863.         break;\

  864.     case PIX_FMT_RGB24:\

  865.         func(uint8_t,0)\

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

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

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

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

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

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

  872.             dest+=6;\

  873.         }\

  874.         break;\

  875.     case PIX_FMT_BGR24:\

  876.         func(uint8_t,0)\

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

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

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

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

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

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

  883.             dest+=6;\

  884.         }\

  885.         break;\

  886.     case PIX_FMT_RGB565:\

  887.     case PIX_FMT_BGR565:\

  888.         {\

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

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

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

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

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

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

  895.             func(uint16_t,0)\

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

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

  898.             }\

  899.         }\

  900.         break;\

  901.     case PIX_FMT_RGB555:\

  902.     case PIX_FMT_BGR555:\

  903.         {\

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

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

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

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

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

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

  910.             func(uint16_t,0)\

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

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

  913.             }\

  914.         }\

  915.         break;\

  916.     case PIX_FMT_RGB8:\

  917.     case PIX_FMT_BGR8:\

  918.         {\

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

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

  921.             func(uint8_t,0)\

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

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

  924.             }\

  925.         }\

  926.         break;\

  927.     case PIX_FMT_RGB4:\

  928.     case PIX_FMT_BGR4:\

  929.         {\

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

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

  932.             func(uint8_t,0)\

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

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

  935.             }\

  936.         }\

  937.         break;\

  938.     case PIX_FMT_RGB4_BYTE:\

  939.     case PIX_FMT_BGR4_BYTE:\

  940.         {\

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

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

  943.             func(uint8_t,0)\

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

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

  946.             }\

  947.         }\

  948.         break;\

  949.     case PIX_FMT_MONOBLACK:\

  950.     case PIX_FMT_MONOWHITE:\

  951.         {\

  952.             func_monoblack\

  953.         }\

  954.         break;\

  955.     case PIX_FMT_YUYV422:\

  956.         func2\

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

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

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

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

  961.         }                \

  962.         break;\

  963.     case PIX_FMT_UYVY422:\

  964.         func2\

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

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

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

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

  969.         }                \

  970.         break;\

  971.     case PIX_FMT_GRAY16BE:\

  972.         func_g16\

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

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

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

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

  977.         }                \

  978.         break;\

  979.     case PIX_FMT_GRAY16LE:\

  980.         func_g16\

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

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

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

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

  985.         }                \

  986.         break;\

  987.     }

  988. 

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

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

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

  992. {

  993.     int i;

  994.     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)

  995. }

  996. 

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

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

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

  1000. {

  1001.     int i;

  1002.     int step= fmt_depth(c->dstFormat)/8;

  1003.     int aidx= 3;

  1004. 

  1005.     switch(c->dstFormat) {

  1006.     case PIX_FMT_ARGB:

  1007.         dest++;

  1008.         aidx= 0;

  1009.     case PIX_FMT_RGB24:

  1010.         aidx--;

  1011.     case PIX_FMT_RGBA:

  1012.         if (CONFIG_SMALL) {

  1013.             int needAlpha = CONFIG_SWSCALE_ALPHA && c->alpPixBuf;

  1014.             YSCALE_YUV_2_RGBX_FULL_C(1<<21, needAlpha)

  1015.                 dest[aidx]= needAlpha ? A : 255;

  1016.                 dest[0]= R>>22;

  1017.                 dest[1]= G>>22;

  1018.                 dest[2]= B>>22;

  1019.                 dest+= step;

  1020.             }

  1021.         } else {

  1022.             if (CONFIG_SWSCALE_ALPHA && c->alpPixBuf) {

  1023.                 YSCALE_YUV_2_RGBX_FULL_C(1<<21, 1)

  1024.                     dest[aidx]= A;

  1025.                     dest[0]= R>>22;

  1026.                     dest[1]= G>>22;

  1027.                     dest[2]= B>>22;

  1028.                     dest+= step;

  1029.                 }

  1030.             } else {

  1031.                 YSCALE_YUV_2_RGBX_FULL_C(1<<21, 0)

  1032.                     dest[aidx]= 255;

  1033.                     dest[0]= R>>22;

  1034.                     dest[1]= G>>22;

  1035.                     dest[2]= B>>22;

  1036.                     dest+= step;

  1037.                 }

  1038.             }

  1039.         }

  1040.         break;

  1041.     case PIX_FMT_ABGR:

  1042.         dest++;

  1043.         aidx= 0;

  1044.     case PIX_FMT_BGR24:

  1045.         aidx--;

  1046.     case PIX_FMT_BGRA:

  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]= B>>22;

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

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

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

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

  1063.                     dest+= step;

  1064.                 }

  1065.             } else {

  1066.                 YSCALE_YUV_2_RGBX_FULL_C(1<<21, 0)

  1067.                     dest[aidx]= 255;

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

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

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

  1071.                     dest+= step;

  1072.                 }

  1073.             }

  1074.         }

  1075.         break;

  1076.     default:

  1077.         assert(0);

  1078.     }

  1079. }

  1080. 

  1081. static void fillPlane(uint8_t* plane, int stride, int width, int height, int y, uint8_t val)

  1082. {

  1083.     int i;

  1084.     uint8_t *ptr = plane + stride*y;

  1085.     for (i=0; i<height; i++) {

  1086.         memset(ptr, val, width);

  1087.         ptr += stride;

  1088.     }

  1089. }

  1090. 

  1091. static inline void rgb48ToY(uint8_t *dst, const uint8_t *src, int width,

  1092.                             uint32_t *unused)

  1093. {

  1094.     int i;

  1095.     for (i = 0; i < width; i++) {

  1096.         int r = src[i*6+0];

  1097.         int g = src[i*6+2];

  1098.         int b = src[i*6+4];

  1099. 

  1100.         dst[i] = (RY*r + GY*g + BY*b + (33<<(RGB2YUV_SHIFT-1))) >> RGB2YUV_SHIFT;

  1101.     }

  1102. }

  1103. 

  1104. static inline void rgb48ToUV(uint8_t *dstU, uint8_t *dstV,

  1105.                              const uint8_t *src1, const uint8_t *src2,

  1106.                              int width, uint32_t *unused)

  1107. {

  1108.     int i;

  1109.     assert(src1==src2);

  1110.     for (i = 0; i < width; i++) {

  1111.         int r = src1[6*i + 0];

  1112.         int g = src1[6*i + 2];

  1113.         int b = src1[6*i + 4];

  1114. 

  1115.         dstU[i] = (RU*r + GU*g + BU*b + (257<<(RGB2YUV_SHIFT-1))) >> RGB2YUV_SHIFT;

  1116.         dstV[i] = (RV*r + GV*g + BV*b + (257<<(RGB2YUV_SHIFT-1))) >> RGB2YUV_SHIFT;

  1117.     }

  1118. }

  1119. 

  1120. static inline void rgb48ToUV_half(uint8_t *dstU, uint8_t *dstV,

  1121.                                   const uint8_t *src1, const uint8_t *src2,

  1122.                                   int width, uint32_t *unused)

  1123. {

  1124.     int i;

  1125.     assert(src1==src2);

  1126.     for (i = 0; i < width; i++) {

  1127.         int r= src1[12*i + 0] + src1[12*i + 6];

  1128.         int g= src1[12*i + 2] + src1[12*i + 8];

  1129.         int b= src1[12*i + 4] + src1[12*i + 10];

  1130. 

  1131.         dstU[i]= (RU*r + GU*g + BU*b + (257<<RGB2YUV_SHIFT)) >> (RGB2YUV_SHIFT+1);

  1132.         dstV[i]= (RV*r + GV*g + BV*b + (257<<RGB2YUV_SHIFT)) >> (RGB2YUV_SHIFT+1);

  1133.     }

  1134. }

  1135. 

  1136. #define BGR2Y(type, name, shr, shg, shb, maskr, maskg, maskb, RY, GY, BY, S)\

  1137. static inline void name(uint8_t *dst, const uint8_t *src, long width, uint32_t *unused)\

  1138. {\

  1139.     int i;\

  1140.     for (i=0; i<width; i++) {\

  1141.         int b= (((const type*)src)[i]>>shb)&maskb;\

  1142.         int g= (((const type*)src)[i]>>shg)&maskg;\

  1143.         int r= (((const type*)src)[i]>>shr)&maskr;\

  1144. \

  1145.         dst[i]= (((RY)*r + (GY)*g + (BY)*b + (33<<((S)-1)))>>(S));\

  1146.     }\

  1147. }

  1148. 

  1149. BGR2Y(uint32_t, bgr32ToY,16, 0, 0, 0x00FF, 0xFF00, 0x00FF, RY<< 8, GY   , BY<< 8, RGB2YUV_SHIFT+8)

  1150. BGR2Y(uint32_t, rgb32ToY, 0, 0,16, 0x00FF, 0xFF00, 0x00FF, RY<< 8, GY   , BY<< 8, RGB2YUV_SHIFT+8)

  1151. BGR2Y(uint16_t, bgr16ToY, 0, 0, 0, 0x001F, 0x07E0, 0xF800, RY<<11, GY<<5, BY    , RGB2YUV_SHIFT+8)

  1152. BGR2Y(uint16_t, bgr15ToY, 0, 0, 0, 0x001F, 0x03E0, 0x7C00, RY<<10, GY<<5, BY    , RGB2YUV_SHIFT+7)

  1153. BGR2Y(uint16_t, rgb16ToY, 0, 0, 0, 0xF800, 0x07E0, 0x001F, RY    , GY<<5, BY<<11, RGB2YUV_SHIFT+8)

  1154. BGR2Y(uint16_t, rgb15ToY, 0, 0, 0, 0x7C00, 0x03E0, 0x001F, RY    , GY<<5, BY<<10, RGB2YUV_SHIFT+7)

  1155. 

  1156. static inline void abgrToA(uint8_t *dst, const uint8_t *src, long width, uint32_t *unused)

  1157. {

  1158.     int i;

  1159.     for (i=0; i<width; i++) {

  1160.         dst[i]= src[4*i];

  1161.     }

  1162. }

  1163. 

  1164. #define BGR2UV(type, name, shr, shg, shb, maska, maskr, maskg, maskb, RU, GU, BU, RV, GV, BV, S)\

  1165. static inline void name(uint8_t *dstU, uint8_t *dstV, const uint8_t *src, const uint8_t *dummy, long width, uint32_t *unused)\

  1166. {\

  1167.     int i;\

  1168.     for (i=0; i<width; i++) {\

  1169.         int b= (((const type*)src)[i]&maskb)>>shb;\

  1170.         int g= (((const type*)src)[i]&maskg)>>shg;\

  1171.         int r= (((const type*)src)[i]&maskr)>>shr;\

  1172. \

  1173.         dstU[i]= ((RU)*r + (GU)*g + (BU)*b + (257<<((S)-1)))>>(S);\

  1174.         dstV[i]= ((RV)*r + (GV)*g + (BV)*b + (257<<((S)-1)))>>(S);\

  1175.     }\

  1176. }\

  1177. static inline void name ## _half(uint8_t *dstU, uint8_t *dstV, const uint8_t *src, const uint8_t *dummy, long width, uint32_t *unused)\

  1178. {\

  1179.     int i;\

  1180.     for (i=0; i<width; i++) {\

  1181.         int pix0= ((const type*)src)[2*i+0];\

  1182.         int pix1= ((const type*)src)[2*i+1];\

  1183.         int g= (pix0&~(maskr|maskb))+(pix1&~(maskr|maskb));\

  1184.         int b= ((pix0+pix1-g)&(maskb|(2*maskb)))>>shb;\

  1185.         int r= ((pix0+pix1-g)&(maskr|(2*maskr)))>>shr;\

  1186.         g&= maskg|(2*maskg);\

  1187. \

  1188.         g>>=shg;\

  1189. \

  1190.         dstU[i]= ((RU)*r + (GU)*g + (BU)*b + (257<<(S)))>>((S)+1);\

  1191.         dstV[i]= ((RV)*r + (GV)*g + (BV)*b + (257<<(S)))>>((S)+1);\

  1192.     }\

  1193. }

  1194. 

  1195. BGR2UV(uint32_t, bgr32ToUV,16, 0, 0, 0xFF000000, 0xFF0000, 0xFF00,   0x00FF, RU<< 8, GU   , BU<< 8, RV<< 8, GV   , BV<< 8, RGB2YUV_SHIFT+8)

  1196. BGR2UV(uint32_t, rgb32ToUV, 0, 0,16, 0xFF000000,   0x00FF, 0xFF00, 0xFF0000, RU<< 8, GU   , BU<< 8, RV<< 8, GV   , BV<< 8, RGB2YUV_SHIFT+8)

  1197. BGR2UV(uint16_t, bgr16ToUV, 0, 0, 0,          0,   0x001F, 0x07E0,   0xF800, RU<<11, GU<<5, BU    , RV<<11, GV<<5, BV    , RGB2YUV_SHIFT+8)

  1198. BGR2UV(uint16_t, bgr15ToUV, 0, 0, 0,          0,   0x001F, 0x03E0,   0x7C00, RU<<10, GU<<5, BU    , RV<<10, GV<<5, BV    , RGB2YUV_SHIFT+7)

  1199. BGR2UV(uint16_t, rgb16ToUV, 0, 0, 0,          0,   0xF800, 0x07E0,   0x001F, RU    , GU<<5, BU<<11, RV    , GV<<5, BV<<11, RGB2YUV_SHIFT+8)

  1200. BGR2UV(uint16_t, rgb15ToUV, 0, 0, 0,          0,   0x7C00, 0x03E0,   0x001F, RU    , GU<<5, BU<<10, RV    , GV<<5, BV<<10, RGB2YUV_SHIFT+7)

  1201. 

  1202. static inline void palToY(uint8_t *dst, const uint8_t *src, long width, uint32_t *pal)

  1203. {

  1204.     int i;

  1205.     for (i=0; i<width; i++) {

  1206.         int d= src[i];

  1207. 

  1208.         dst[i]= pal[d] & 0xFF;

  1209.     }

  1210. }

  1211. 

  1212. static inline void palToUV(uint8_t *dstU, uint8_t *dstV,

  1213.                            const uint8_t *src1, const uint8_t *src2,

  1214.                            long width, uint32_t *pal)

  1215. {

  1216.     int i;

  1217.     assert(src1 == src2);

  1218.     for (i=0; i<width; i++) {

  1219.         int p= pal[src1[i]];

  1220. 

  1221.         dstU[i]= p>>8;

  1222.         dstV[i]= p>>16;

  1223.     }

  1224. }

  1225. 

  1226. static inline void monowhite2Y(uint8_t *dst, const uint8_t *src, long width, uint32_t *unused)

  1227. {

  1228.     int i, j;

  1229.     for (i=0; i<width/8; i++) {

  1230.         int d= ~src[i];

  1231.         for(j=0; j<8; j++)

  1232.             dst[8*i+j]= ((d>>(7-j))&1)*255;

  1233.     }

  1234. }

  1235. 

  1236. static inline void monoblack2Y(uint8_t *dst, const uint8_t *src, long width, uint32_t *unused)

  1237. {

  1238.     int i, j;

  1239.     for (i=0; i<width/8; i++) {

  1240.         int d= src[i];

  1241.         for(j=0; j<8; j++)

  1242.             dst[8*i+j]= ((d>>(7-j))&1)*255;

  1243.     }

  1244. }

  1245. 

  1246. //Note: we have C, MMX, MMX2, 3DNOW versions, there is no 3DNOW+MMX2 one

  1247. //Plain C versions

  1248. #if ((!HAVE_MMX || !CONFIG_GPL) && !HAVE_ALTIVEC) || CONFIG_RUNTIME_CPUDETECT

  1249. #define COMPILE_C

  1250. #endif

  1251. 

  1252. #if ARCH_PPC

  1253. #if HAVE_ALTIVEC || CONFIG_RUNTIME_CPUDETECT

  1254. #define COMPILE_ALTIVEC

  1255. #endif

  1256. #endif //ARCH_PPC

  1257. 

  1258. #if ARCH_X86

  1259. 

  1260. #if ((HAVE_MMX && !HAVE_AMD3DNOW && !HAVE_MMX2) || CONFIG_RUNTIME_CPUDETECT) && CONFIG_GPL

  1261. #define COMPILE_MMX

  1262. #endif

  1263. 

  1264. #if (HAVE_MMX2 || CONFIG_RUNTIME_CPUDETECT) && CONFIG_GPL

  1265. #define COMPILE_MMX2

  1266. #endif

  1267. 

  1268. #if ((HAVE_AMD3DNOW && !HAVE_MMX2) || CONFIG_RUNTIME_CPUDETECT) && CONFIG_GPL

  1269. #define COMPILE_3DNOW

  1270. #endif

  1271. #endif //ARCH_X86

  1272. 

  1273. #define COMPILE_TEMPLATE_MMX 0

  1274. #define COMPILE_TEMPLATE_MMX2 0

  1275. #define COMPILE_TEMPLATE_AMD3DNOW 0

  1276. #define COMPILE_TEMPLATE_ALTIVEC 0

  1277. 

  1278. #ifdef COMPILE_C

  1279. #define RENAME(a) a ## _C

  1280. #include "swscale_template.c"

  1281. #endif

  1282. 

  1283. #ifdef COMPILE_ALTIVEC

  1284. #undef RENAME

  1285. #undef COMPILE_TEMPLATE_ALTIVEC

  1286. #define COMPILE_TEMPLATE_ALTIVEC 1

  1287. #define RENAME(a) a ## _altivec

  1288. #include "swscale_template.c"

  1289. #endif

  1290. 

  1291. #if ARCH_X86

  1292. 

  1293. //MMX versions

  1294. #ifdef COMPILE_MMX

  1295. #undef RENAME

  1296. #undef COMPILE_TEMPLATE_MMX

  1297. #undef COMPILE_TEMPLATE_MMX2

  1298. #undef COMPILE_TEMPLATE_AMD3DNOW

  1299. #define COMPILE_TEMPLATE_MMX 1

  1300. #define COMPILE_TEMPLATE_MMX2 0

  1301. #define COMPILE_TEMPLATE_AMD3DNOW 0

  1302. #define RENAME(a) a ## _MMX

  1303. #include "swscale_template.c"

  1304. #endif

  1305. 

  1306. //MMX2 versions

  1307. #ifdef COMPILE_MMX2

  1308. #undef RENAME

  1309. #undef COMPILE_TEMPLATE_MMX

  1310. #undef COMPILE_TEMPLATE_MMX2

  1311. #undef COMPILE_TEMPLATE_AMD3DNOW

  1312. #define COMPILE_TEMPLATE_MMX 1

  1313. #define COMPILE_TEMPLATE_MMX2 1

  1314. #define COMPILE_TEMPLATE_AMD3DNOW 0

  1315. #define RENAME(a) a ## _MMX2

  1316. #include "swscale_template.c"

  1317. #endif

  1318. 

  1319. //3DNOW versions

  1320. #ifdef COMPILE_3DNOW

  1321. #undef RENAME

  1322. #undef COMPILE_TEMPLATE_MMX

  1323. #undef COMPILE_TEMPLATE_MMX2

  1324. #undef COMPILE_TEMPLATE_AMD3DNOW

  1325. #define COMPILE_TEMPLATE_MMX 1

  1326. #define COMPILE_TEMPLATE_MMX2 0

  1327. #define COMPILE_TEMPLATE_AMD3DNOW 1

  1328. #define RENAME(a) a ## _3DNow

  1329. #include "swscale_template.c"

  1330. #endif

  1331. 

  1332. #endif //ARCH_X86

  1333. 

  1334. static double getSplineCoeff(double a, double b, double c, double d, double dist)

  1335. {

  1336. //    printf("%f %f %f %f %f\n", a,b,c,d,dist);

  1337.     if (dist<=1.0) return ((d*dist + c)*dist + b)*dist +a;

  1338.     else           return getSplineCoeff(        0.0,

  1339.                                           b+ 2.0*c + 3.0*d,

  1340.                                                  c + 3.0*d,

  1341.                                          -b- 3.0*c - 6.0*d,

  1342.                                          dist-1.0);

  1343. }

  1344. 

  1345. static int initFilter(int16_t **outFilter, int16_t **filterPos, int *outFilterSize, int xInc,

  1346.                       int srcW, int dstW, int filterAlign, int one, int flags,

  1347.                       SwsVector *srcFilter, SwsVector *dstFilter, double param[2])

  1348. {

  1349.     int i;

  1350.     int filterSize;

  1351.     int filter2Size;

  1352.     int minFilterSize;

  1353.     int64_t *filter=NULL;

  1354.     int64_t *filter2=NULL;

  1355.     const int64_t fone= 1LL<<54;

  1356.     int ret= -1;

  1357. #if ARCH_X86

  1358.     if (flags & SWS_CPU_CAPS_MMX)

  1359.         __asm__ volatile("emms\n\t"::: "memory"); //FIXME this should not be required but it IS (even for non-MMX versions)

  1360. #endif

  1361. 

  1362.     // NOTE: the +1 is for the MMX scaler which reads over the end

  1363.     FF_ALLOC_OR_GOTO(NULL, *filterPos, (dstW+1)*sizeof(int16_t), fail);

  1364. 

  1365.     if (FFABS(xInc - 0x10000) <10) { // unscaled

  1366.         int i;

  1367.         filterSize= 1;

  1368.         FF_ALLOCZ_OR_GOTO(NULL, filter, dstW*sizeof(*filter)*filterSize, fail);

  1369. 

  1370.         for (i=0; i<dstW; i++) {

  1371.             filter[i*filterSize]= fone;

  1372.             (*filterPos)[i]=i;

  1373.         }

  1374. 

  1375.     } else if (flags&SWS_POINT) { // lame looking point sampling mode

  1376.         int i;

  1377.         int xDstInSrc;

  1378.         filterSize= 1;

  1379.         FF_ALLOC_OR_GOTO(NULL, filter, dstW*sizeof(*filter)*filterSize, fail);

  1380. 

  1381.         xDstInSrc= xInc/2 - 0x8000;

  1382.         for (i=0; i<dstW; i++) {

  1383.             int xx= (xDstInSrc - ((filterSize-1)<<15) + (1<<15))>>16;

  1384. 

  1385.             (*filterPos)[i]= xx;

  1386.             filter[i]= fone;

  1387.             xDstInSrc+= xInc;

  1388.         }

  1389.     } else if ((xInc <= (1<<16) && (flags&SWS_AREA)) || (flags&SWS_FAST_BILINEAR)) { // bilinear upscale

  1390.         int i;

  1391.         int xDstInSrc;

  1392.         filterSize= 2;

  1393.         FF_ALLOC_OR_GOTO(NULL, filter, dstW*sizeof(*filter)*filterSize, fail);

  1394. 

  1395.         xDstInSrc= xInc/2 - 0x8000;

  1396.         for (i=0; i<dstW; i++) {

  1397.             int xx= (xDstInSrc - ((filterSize-1)<<15) + (1<<15))>>16;

  1398.             int j;

  1399. 

  1400.             (*filterPos)[i]= xx;

  1401.             //bilinear upscale / linear interpolate / area averaging

  1402.             for (j=0; j<filterSize; j++) {

  1403.                 int64_t coeff= fone - FFABS((xx<<16) - xDstInSrc)*(fone>>16);

  1404.                 if (coeff<0) coeff=0;

  1405.                 filter[i*filterSize + j]= coeff;

  1406.                 xx++;

  1407.             }

  1408.             xDstInSrc+= xInc;

  1409.         }

  1410.     } else {

  1411.         int xDstInSrc;

  1412.         int sizeFactor;

  1413. 

  1414.         if      (flags&SWS_BICUBIC)      sizeFactor=  4;

  1415.         else if (flags&SWS_X)            sizeFactor=  8;

  1416.         else if (flags&SWS_AREA)         sizeFactor=  1; //downscale only, for upscale it is bilinear

  1417.         else if (flags&SWS_GAUSS)        sizeFactor=  8;   // infinite ;)

  1418.         else if (flags&SWS_LANCZOS)      sizeFactor= param[0] != SWS_PARAM_DEFAULT ? ceil(2*param[0]) : 6;

  1419.         else if (flags&SWS_SINC)         sizeFactor= 20; // infinite ;)

  1420.         else if (flags&SWS_SPLINE)       sizeFactor= 20;  // infinite ;)

  1421.         else if (flags&SWS_BILINEAR)     sizeFactor=  2;

  1422.         else {

  1423.             sizeFactor= 0; //GCC warning killer

  1424.             assert(0);

  1425.         }

  1426. 

  1427.         if (xInc <= 1<<16)      filterSize= 1 + sizeFactor; // upscale

  1428.         else                    filterSize= 1 + (sizeFactor*srcW + dstW - 1)/ dstW;

  1429. 

  1430.         if (filterSize > srcW-2) filterSize=srcW-2;

  1431. 

  1432.         FF_ALLOC_OR_GOTO(NULL, filter, dstW*sizeof(*filter)*filterSize, fail);

  1433. 

  1434.         xDstInSrc= xInc - 0x10000;

  1435.         for (i=0; i<dstW; i++) {

  1436.             int xx= (xDstInSrc - ((filterSize-2)<<16)) / (1<<17);

  1437.             int j;

  1438.             (*filterPos)[i]= xx;

  1439.             for (j=0; j<filterSize; j++) {

  1440.                 int64_t d= ((int64_t)FFABS((xx<<17) - xDstInSrc))<<13;

  1441.                 double floatd;

  1442.                 int64_t coeff;

  1443. 

  1444.                 if (xInc > 1<<16)

  1445.                     d= d*dstW/srcW;

  1446.                 floatd= d * (1.0/(1<<30));

  1447. 

  1448.                 if (flags & SWS_BICUBIC) {

  1449.                     int64_t B= (param[0] != SWS_PARAM_DEFAULT ? param[0] :   0) * (1<<24);

  1450.                     int64_t C= (param[1] != SWS_PARAM_DEFAULT ? param[1] : 0.6) * (1<<24);

  1451.                     int64_t dd = ( d*d)>>30;

  1452.                     int64_t ddd= (dd*d)>>30;

  1453. 

  1454.                     if      (d < 1LL<<30)

  1455.                         coeff = (12*(1<<24)-9*B-6*C)*ddd + (-18*(1<<24)+12*B+6*C)*dd + (6*(1<<24)-2*B)*(1<<30);

  1456.                     else if (d < 1LL<<31)

  1457.                         coeff = (-B-6*C)*ddd + (6*B+30*C)*dd + (-12*B-48*C)*d + (8*B+24*C)*(1<<30);

  1458.                     else

  1459.                         coeff=0.0;

  1460.                     coeff *= fone>>(30+24);

  1461.                 }

  1462. /*                else if (flags & SWS_X) {

  1463.                     double p= param ? param*0.01 : 0.3;

  1464.                     coeff = d ? sin(d*PI)/(d*PI) : 1.0;

  1465.                     coeff*= pow(2.0, - p*d*d);

  1466.                 }*/

  1467.                 else if (flags & SWS_X) {

  1468.                     double A= param[0] != SWS_PARAM_DEFAULT ? param[0] : 1.0;

  1469.                     double c;

  1470. 

  1471.                     if (floatd<1.0)

  1472.                         c = cos(floatd*PI);

  1473.                     else

  1474.                         c=-1.0;

  1475.                     if (c<0.0)      c= -pow(-c, A);

  1476.                     else            c=  pow( c, A);

  1477.                     coeff= (c*0.5 + 0.5)*fone;

  1478.                 } else if (flags & SWS_AREA) {

  1479.                     int64_t d2= d - (1<<29);

  1480.                     if      (d2*xInc < -(1LL<<(29+16))) coeff= 1.0 * (1LL<<(30+16));

  1481.                     else if (d2*xInc <  (1LL<<(29+16))) coeff= -d2*xInc + (1LL<<(29+16));

  1482.                     else coeff=0.0;

  1483.                     coeff *= fone>>(30+16);

  1484.                 } else if (flags & SWS_GAUSS) {

  1485.                     double p= param[0] != SWS_PARAM_DEFAULT ? param[0] : 3.0;

  1486.                     coeff = (pow(2.0, - p*floatd*floatd))*fone;

  1487.                 } else if (flags & SWS_SINC) {

  1488.                     coeff = (d ? sin(floatd*PI)/(floatd*PI) : 1.0)*fone;

  1489.                 } else if (flags & SWS_LANCZOS) {

  1490.                     double p= param[0] != SWS_PARAM_DEFAULT ? param[0] : 3.0;

  1491.                     coeff = (d ? sin(floatd*PI)*sin(floatd*PI/p)/(floatd*floatd*PI*PI/p) : 1.0)*fone;

  1492.                     if (floatd>p) coeff=0;

  1493.                 } else if (flags & SWS_BILINEAR) {

  1494.                     coeff= (1<<30) - d;

  1495.                     if (coeff<0) coeff=0;

  1496.                     coeff *= fone >> 30;

  1497.                 } else if (flags & SWS_SPLINE) {

  1498.                     double p=-2.196152422706632;

  1499.                     coeff = getSplineCoeff(1.0, 0.0, p, -p-1.0, floatd) * fone;

  1500.                 } else {

  1501.                     coeff= 0.0; //GCC warning killer

  1502.                     assert(0);

  1503.                 }

  1504. 

  1505.                 filter[i*filterSize + j]= coeff;

  1506.                 xx++;

  1507.             }

  1508.             xDstInSrc+= 2*xInc;

  1509.         }

  1510.     }

  1511. 

  1512.     /* apply src & dst Filter to filter -> filter2

  1513.        av_free(filter);

  1514.     */

  1515.     assert(filterSize>0);

  1516.     filter2Size= filterSize;

  1517.     if (srcFilter) filter2Size+= srcFilter->length - 1;

  1518.     if (dstFilter) filter2Size+= dstFilter->length - 1;

  1519.     assert(filter2Size>0);

  1520.     FF_ALLOCZ_OR_GOTO(NULL, filter2, filter2Size*dstW*sizeof(*filter2), fail);

  1521. 

  1522.     for (i=0; i<dstW; i++) {

  1523.         int j, k;

  1524. 

  1525.         if(srcFilter) {

  1526.             for (k=0; k<srcFilter->length; k++) {

  1527.                 for (j=0; j<filterSize; j++)

  1528.                     filter2[i*filter2Size + k + j] += srcFilter->coeff[k]*filter[i*filterSize + j];

  1529.             }

  1530.         } else {

  1531.             for (j=0; j<filterSize; j++)

  1532.                 filter2[i*filter2Size + j]= filter[i*filterSize + j];

  1533.         }

  1534.         //FIXME dstFilter

  1535. 

  1536.         (*filterPos)[i]+= (filterSize-1)/2 - (filter2Size-1)/2;

  1537.     }

  1538.     av_freep(&filter);

  1539. 

  1540.     /* try to reduce the filter-size (step1 find size and shift left) */

  1541.     // Assume it is near normalized (*0.5 or *2.0 is OK but * 0.001 is not).

  1542.     minFilterSize= 0;

  1543.     for (i=dstW-1; i>=0; i--) {

  1544.         int min= filter2Size;

  1545.         int j;

  1546.         int64_t cutOff=0.0;

  1547. 

  1548.         /* get rid of near zero elements on the left by shifting left */

  1549.         for (j=0; j<filter2Size; j++) {

  1550.             int k;

  1551.             cutOff += FFABS(filter2[i*filter2Size]);

  1552. 

  1553.             if (cutOff > SWS_MAX_REDUCE_CUTOFF*fone) break;

  1554. 

  1555.             /* preserve monotonicity because the core can't handle the filter otherwise */

  1556.             if (i<dstW-1 && (*filterPos)[i] >= (*filterPos)[i+1]) break;

  1557. 

  1558.             // move filter coefficients left

  1559.             for (k=1; k<filter2Size; k++)

  1560.                 filter2[i*filter2Size + k - 1]= filter2[i*filter2Size + k];

  1561.             filter2[i*filter2Size + k - 1]= 0;

  1562.             (*filterPos)[i]++;

  1563.         }

  1564. 

  1565.         cutOff=0;

  1566.         /* count near zeros on the right */

  1567.         for (j=filter2Size-1; j>0; j--) {

  1568.             cutOff += FFABS(filter2[i*filter2Size + j]);

  1569. 

  1570.             if (cutOff > SWS_MAX_REDUCE_CUTOFF*fone) break;

  1571.             min--;

  1572.         }

  1573. 

  1574.         if (min>minFilterSize) minFilterSize= min;

  1575.     }

  1576. 

  1577.     if (flags & SWS_CPU_CAPS_ALTIVEC) {

  1578.         // we can handle the special case 4,

  1579.         // so we don't want to go to the full 8

  1580.         if (minFilterSize < 5)

  1581.             filterAlign = 4;

  1582. 

  1583.         // We really don't want to waste our time

  1584.         // doing useless computation, so fall back on

  1585.         // the scalar C code for very small filters.

  1586.         // Vectorizing is worth it only if you have a

  1587.         // decent-sized vector.

  1588.         if (minFilterSize < 3)

  1589.             filterAlign = 1;

  1590.     }

  1591. 

  1592.     if (flags & SWS_CPU_CAPS_MMX) {

  1593.         // special case for unscaled vertical filtering

  1594.         if (minFilterSize == 1 && filterAlign == 2)

  1595.             filterAlign= 1;

  1596.     }

  1597. 

  1598.     assert(minFilterSize > 0);

  1599.     filterSize= (minFilterSize +(filterAlign-1)) & (~(filterAlign-1));

  1600.     assert(filterSize > 0);

  1601.     filter= av_malloc(filterSize*dstW*sizeof(*filter));

  1602.     if (filterSize >= MAX_FILTER_SIZE*16/((flags&SWS_ACCURATE_RND) ? APCK_SIZE : 16) || !filter)

  1603.         goto fail;

  1604.     *outFilterSize= filterSize;

  1605. 

  1606.     if (flags&SWS_PRINT_INFO)

  1607.         av_log(NULL, AV_LOG_VERBOSE, "SwScaler: reducing / aligning filtersize %d -> %d\n", filter2Size, filterSize);

  1608.     /* try to reduce the filter-size (step2 reduce it) */

  1609.     for (i=0; i<dstW; i++) {

  1610.         int j;

  1611. 

  1612.         for (j=0; j<filterSize; j++) {

  1613.             if (j>=filter2Size) filter[i*filterSize + j]= 0;

  1614.             else               filter[i*filterSize + j]= filter2[i*filter2Size + j];

  1615.             if((flags & SWS_BITEXACT) && j>=minFilterSize)

  1616.                 filter[i*filterSize + j]= 0;

  1617.         }

  1618.     }

  1619. 

  1620.     //FIXME try to align filterPos if possible

  1621. 

  1622.     //fix borders

  1623.     for (i=0; i<dstW; i++) {

  1624.         int j;

  1625.         if ((*filterPos)[i] < 0) {

  1626.             // move filter coefficients left to compensate for filterPos

  1627.             for (j=1; j<filterSize; j++) {

  1628.                 int left= FFMAX(j + (*filterPos)[i], 0);

  1629.                 filter[i*filterSize + left] += filter[i*filterSize + j];

  1630.                 filter[i*filterSize + j]=0;

  1631.             }

  1632.             (*filterPos)[i]= 0;

  1633.         }

  1634. 

  1635.         if ((*filterPos)[i] + filterSize > srcW) {

  1636.             int shift= (*filterPos)[i] + filterSize - srcW;

  1637.             // move filter coefficients right to compensate for filterPos

  1638.             for (j=filterSize-2; j>=0; j--) {

  1639.                 int right= FFMIN(j + shift, filterSize-1);

  1640.                 filter[i*filterSize +right] += filter[i*filterSize +j];

  1641.                 filter[i*filterSize +j]=0;

  1642.             }

  1643.             (*filterPos)[i]= srcW - filterSize;

  1644.         }

  1645.     }

  1646. 

  1647.     // Note the +1 is for the MMX scaler which reads over the end

  1648.     /* align at 16 for AltiVec (needed by hScale_altivec_real) */

  1649.     FF_ALLOCZ_OR_GOTO(NULL, *outFilter, *outFilterSize*(dstW+1)*sizeof(int16_t), fail);

  1650. 

  1651.     /* normalize & store in outFilter */

  1652.     for (i=0; i<dstW; i++) {

  1653.         int j;

  1654.         int64_t error=0;

  1655.         int64_t sum=0;

  1656. 

  1657.         for (j=0; j<filterSize; j++) {

  1658.             sum+= filter[i*filterSize + j];

  1659.         }

  1660.         sum= (sum + one/2)/ one;

  1661.         for (j=0; j<*outFilterSize; j++) {

  1662.             int64_t v= filter[i*filterSize + j] + error;

  1663.             int intV= ROUNDED_DIV(v, sum);

  1664.             (*outFilter)[i*(*outFilterSize) + j]= intV;

  1665.             error= v - intV*sum;

  1666.         }

  1667.     }

  1668. 

  1669.     (*filterPos)[dstW]= (*filterPos)[dstW-1]; // the MMX scaler will read over the end

  1670.     for (i=0; i<*outFilterSize; i++) {

  1671.         int j= dstW*(*outFilterSize);

  1672.         (*outFilter)[j + i]= (*outFilter)[j + i - (*outFilterSize)];

  1673.     }

  1674. 

  1675.     ret=0;

  1676. fail:

  1677.     av_free(filter);

  1678.     av_free(filter2);

  1679.     return ret;

  1680. }

  1681. 

  1682. #ifdef COMPILE_MMX2

  1683. static int initMMX2HScaler(int dstW, int xInc, uint8_t *filterCode, int16_t *filter, int32_t *filterPos, int numSplits)

  1684. {

  1685.     uint8_t *fragmentA;

  1686.     x86_reg imm8OfPShufW1A;

  1687.     x86_reg imm8OfPShufW2A;

  1688.     x86_reg fragmentLengthA;

  1689.     uint8_t *fragmentB;

  1690.     x86_reg imm8OfPShufW1B;

  1691.     x86_reg imm8OfPShufW2B;

  1692.     x86_reg fragmentLengthB;

  1693.     int fragmentPos;

  1694. 

  1695.     int xpos, i;

  1696. 

  1697.     // create an optimized horizontal scaling routine

  1698.     /* This scaler is made of runtime-generated MMX2 code using specially

  1699.      * tuned pshufw instructions. For every four output pixels, if four

  1700.      * input pixels are enough for the fast bilinear scaling, then a chunk

  1701.      * of fragmentB is used. If five input pixels are needed, then a chunk

  1702.      * of fragmentA is used.

  1703.      */

  1704. 

  1705.     //code fragment

  1706. 

  1707.     __asm__ volatile(

  1708.         "jmp                         9f                 \n\t"

  1709.     // Begin

  1710.         "0:                                             \n\t"

  1711.         "movq    (%%"REG_d", %%"REG_a"), %%mm3          \n\t"

  1712.         "movd    (%%"REG_c", %%"REG_S"), %%mm0          \n\t"

  1713.         "movd   1(%%"REG_c", %%"REG_S"), %%mm1          \n\t"

  1714.         "punpcklbw                %%mm7, %%mm1          \n\t"

  1715.         "punpcklbw                %%mm7, %%mm0          \n\t"

  1716.         "pshufw                   $0xFF, %%mm1, %%mm1   \n\t"

  1717.         "1:                                             \n\t"

  1718.         "pshufw                   $0xFF, %%mm0, %%mm0   \n\t"

  1719.         "2:                                             \n\t"

  1720.         "psubw                    %%mm1, %%mm0          \n\t"

  1721.         "movl   8(%%"REG_b", %%"REG_a"), %%esi          \n\t"

  1722.         "pmullw                   %%mm3, %%mm0          \n\t"

  1723.         "psllw                       $7, %%mm1          \n\t"

  1724.         "paddw                    %%mm1, %%mm0          \n\t"

  1725. 

  1726.         "movq                     %%mm0, (%%"REG_D", %%"REG_a") \n\t"

  1727. 

  1728.         "add                         $8, %%"REG_a"      \n\t"

  1729.     // End

  1730.         "9:                                             \n\t"

  1731. //        "int $3                                         \n\t"

  1732.         "lea                 " LOCAL_MANGLE(0b) ", %0   \n\t"

  1733.         "lea                 " LOCAL_MANGLE(1b) ", %1   \n\t"

  1734.         "lea                 " LOCAL_MANGLE(2b) ", %2   \n\t"

  1735.         "dec                         %1                 \n\t"

  1736.         "dec                         %2                 \n\t"

  1737.         "sub                         %0, %1             \n\t"

  1738.         "sub                         %0, %2             \n\t"

  1739.         "lea                 " LOCAL_MANGLE(9b) ", %3   \n\t"

  1740.         "sub                         %0, %3             \n\t"

  1741. 

  1742. 

  1743.         :"=r" (fragmentA), "=r" (imm8OfPShufW1A), "=r" (imm8OfPShufW2A),

  1744.         "=r" (fragmentLengthA)

  1745.     );

  1746. 

  1747.     __asm__ volatile(

  1748.         "jmp                         9f                 \n\t"

  1749.     // Begin

  1750.         "0:                                             \n\t"

  1751.         "movq    (%%"REG_d", %%"REG_a"), %%mm3          \n\t"

  1752.         "movd    (%%"REG_c", %%"REG_S"), %%mm0          \n\t"

  1753.         "punpcklbw                %%mm7, %%mm0          \n\t"

  1754.         "pshufw                   $0xFF, %%mm0, %%mm1   \n\t"

  1755.         "1:                                             \n\t"

  1756.         "pshufw                   $0xFF, %%mm0, %%mm0   \n\t"

  1757.         "2:                                             \n\t"

  1758.         "psubw                    %%mm1, %%mm0          \n\t"

  1759.         "movl   8(%%"REG_b", %%"REG_a"), %%esi          \n\t"

  1760.         "pmullw                   %%mm3, %%mm0          \n\t"

  1761.         "psllw                       $7, %%mm1          \n\t"

  1762.         "paddw                    %%mm1, %%mm0          \n\t"

  1763. 

  1764.         "movq                     %%mm0, (%%"REG_D", %%"REG_a") \n\t"

  1765. 

  1766.         "add                         $8, %%"REG_a"      \n\t"

  1767.     // End

  1768.         "9:                                             \n\t"

  1769. //        "int                       $3                   \n\t"

  1770.         "lea                 " LOCAL_MANGLE(0b) ", %0   \n\t"

  1771.         "lea                 " LOCAL_MANGLE(1b) ", %1   \n\t"

  1772.         "lea                 " LOCAL_MANGLE(2b) ", %2   \n\t"

  1773.         "dec                         %1                 \n\t"

  1774.         "dec                         %2                 \n\t"

  1775.         "sub                         %0, %1             \n\t"

  1776.         "sub                         %0, %2             \n\t"

  1777.         "lea                 " LOCAL_MANGLE(9b) ", %3   \n\t"

  1778.         "sub                         %0, %3             \n\t"

  1779. 

  1780. 

  1781.         :"=r" (fragmentB), "=r" (imm8OfPShufW1B), "=r" (imm8OfPShufW2B),

  1782.         "=r" (fragmentLengthB)

  1783.     );

  1784. 

  1785.     xpos= 0; //lumXInc/2 - 0x8000; // difference between pixel centers

  1786.     fragmentPos=0;

  1787. 

  1788.     for (i=0; i<dstW/numSplits; i++) {

  1789.         int xx=xpos>>16;

  1790. 

  1791.         if ((i&3) == 0) {

  1792.             int a=0;

  1793.             int b=((xpos+xInc)>>16) - xx;

  1794.             int c=((xpos+xInc*2)>>16) - xx;

  1795.             int d=((xpos+xInc*3)>>16) - xx;

  1796.             int inc                = (d+1<4);

  1797.             uint8_t *fragment      = (d+1<4) ? fragmentB       : fragmentA;

  1798.             x86_reg imm8OfPShufW1  = (d+1<4) ? imm8OfPShufW1B  : imm8OfPShufW1A;

  1799.             x86_reg imm8OfPShufW2  = (d+1<4) ? imm8OfPShufW2B  : imm8OfPShufW2A;

  1800.             x86_reg fragmentLength = (d+1<4) ? fragmentLengthB : fragmentLengthA;

  1801.             int maxShift= 3-(d+inc);

  1802.             int shift=0;

  1803. 

  1804.             if (filterCode) {

  1805.                 filter[i  ] = (( xpos         & 0xFFFF) ^ 0xFFFF)>>9;

  1806.                 filter[i+1] = (((xpos+xInc  ) & 0xFFFF) ^ 0xFFFF)>>9;

  1807.                 filter[i+2] = (((xpos+xInc*2) & 0xFFFF) ^ 0xFFFF)>>9;

  1808.                 filter[i+3] = (((xpos+xInc*3) & 0xFFFF) ^ 0xFFFF)>>9;

  1809.                 filterPos[i/2]= xx;

  1810. 

  1811.                 memcpy(filterCode + fragmentPos, fragment, fragmentLength);

  1812. 

  1813.                 filterCode[fragmentPos + imm8OfPShufW1]=

  1814.                     (a+inc) | ((b+inc)<<2) | ((c+inc)<<4) | ((d+inc)<<6);

  1815.                 filterCode[fragmentPos + imm8OfPShufW2]=

  1816.                     a | (b<<2) | (c<<4) | (d<<6);

  1817. 

  1818.                 if (i+4-inc>=dstW) shift=maxShift; //avoid overread

  1819.                 else if ((filterPos[i/2]&3) <= maxShift) shift=filterPos[i/2]&3; //Align

  1820. 

  1821.                 if (shift && i>=shift) {

  1822.                     filterCode[fragmentPos + imm8OfPShufW1]+= 0x55*shift;

  1823.                     filterCode[fragmentPos + imm8OfPShufW2]+= 0x55*shift;

  1824.                     filterPos[i/2]-=shift;

  1825.                 }

  1826.             }

  1827. 

  1828.             fragmentPos+= fragmentLength;

  1829. 

  1830.             if (filterCode)

  1831.                 filterCode[fragmentPos]= RET;

  1832.         }

  1833.         xpos+=xInc;

  1834.     }

  1835.     if (filterCode)

  1836.         filterPos[((i/2)+1)&(~1)]= xpos>>16; // needed to jump to the next part

  1837. 

  1838.     return fragmentPos + 1;

  1839. }

  1840. #endif /* COMPILE_MMX2 */

  1841. 

  1842. static SwsFunc getSwsFunc(SwsContext *c)

  1843. {

  1844. #if CONFIG_RUNTIME_CPUDETECT

  1845.     int flags = c->flags;

  1846. 

  1847. #if ARCH_X86 && CONFIG_GPL

  1848.     // ordered per speed fastest first

  1849.     if (flags & SWS_CPU_CAPS_MMX2) {

  1850.         sws_init_swScale_MMX2(c);

  1851.         return swScale_MMX2;

  1852.     } else if (flags & SWS_CPU_CAPS_3DNOW) {

  1853.         sws_init_swScale_3DNow(c);

  1854.         return swScale_3DNow;

  1855.     } else if (flags & SWS_CPU_CAPS_MMX) {

  1856.         sws_init_swScale_MMX(c);

  1857.         return swScale_MMX;

  1858.     } else {

  1859.         sws_init_swScale_C(c);

  1860.         return swScale_C;

  1861.     }

  1862. 

  1863. #else

  1864. #if ARCH_PPC

  1865.     if (flags & SWS_CPU_CAPS_ALTIVEC) {

  1866.         sws_init_swScale_altivec(c);

  1867.         return swScale_altivec;

  1868.     } else {

  1869.         sws_init_swScale_C(c);

  1870.         return swScale_C;

  1871.     }

  1872. #endif

  1873.     sws_init_swScale_C(c);

  1874.     return swScale_C;

  1875. #endif /* ARCH_X86 && CONFIG_GPL */

  1876. #else //CONFIG_RUNTIME_CPUDETECT

  1877. #if   COMPILE_TEMPLATE_MMX2

  1878.     sws_init_swScale_MMX2(c);

  1879.     return swScale_MMX2;

  1880. #elif COMPILE_TEMPLATE_AMD3DNOW

  1881.     sws_init_swScale_3DNow(c);

  1882.     return swScale_3DNow;

  1883. #elif COMPILE_TEMPLATE_MMX

  1884.     sws_init_swScale_MMX(c);

  1885.     return swScale_MMX;

  1886. #elif COMPILE_TEMPLATE_ALTIVEC

  1887.     sws_init_swScale_altivec(c);

  1888.     return swScale_altivec;

  1889. #else

  1890.     sws_init_swScale_C(c);

  1891.     return swScale_C;

  1892. #endif

  1893. #endif //!CONFIG_RUNTIME_CPUDETECT

  1894. }

  1895. 

  1896. static int PlanarToNV12Wrapper(SwsContext *c, const uint8_t* src[], int srcStride[], int srcSliceY,

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

  1898. {

  1899.     uint8_t *dst=dstParam[0] + dstStride[0]*srcSliceY;

  1900.     /* Copy Y plane */

  1901.     if (dstStride[0]==srcStride[0] && srcStride[0] > 0)

  1902.         memcpy(dst, src[0], srcSliceH*dstStride[0]);

  1903.     else {

  1904.         int i;

  1905.         const uint8_t *srcPtr= src[0];

  1906.         uint8_t *dstPtr= dst;

  1907.         for (i=0; i<srcSliceH; i++) {

  1908.             memcpy(dstPtr, srcPtr, c->srcW);

  1909.             srcPtr+= srcStride[0];

  1910.             dstPtr+= dstStride[0];

  1911.         }

  1912.     }

  1913.     dst = dstParam[1] + dstStride[1]*srcSliceY/2;

  1914.     if (c->dstFormat == PIX_FMT_NV12)

  1915.         interleaveBytes(src[1], src[2], dst, c->srcW/2, srcSliceH/2, srcStride[1], srcStride[2], dstStride[0]);

  1916.     else

  1917.         interleaveBytes(src[2], src[1], dst, c->srcW/2, srcSliceH/2, srcStride[2], srcStride[1], dstStride[0]);

  1918. 

  1919.     return srcSliceH;

  1920. }

  1921. 

  1922. static int PlanarToYuy2Wrapper(SwsContext *c, const uint8_t* src[], int srcStride[], int srcSliceY,

  1923.                                int srcSliceH, uint8_t* dstParam[], int dstStride[])

  1924. {

  1925.     uint8_t *dst=dstParam[0] + dstStride[0]*srcSliceY;

  1926. 

  1927.     yv12toyuy2(src[0], src[1], src[2], dst, c->srcW, srcSliceH, srcStride[0], srcStride[1], dstStride[0]);

  1928. 

  1929.     return srcSliceH;

  1930. }

  1931. 

  1932. static int PlanarToUyvyWrapper(SwsContext *c, const uint8_t* src[], int srcStride[], int srcSliceY,

  1933.                                int srcSliceH, uint8_t* dstParam[], int dstStride[])

  1934. {

  1935.     uint8_t *dst=dstParam[0] + dstStride[0]*srcSliceY;

  1936. 

  1937.     yv12touyvy(src[0], src[1], src[2], dst, c->srcW, srcSliceH, srcStride[0], srcStride[1], dstStride[0]);

  1938. 

  1939.     return srcSliceH;

  1940. }

  1941. 

  1942. static int YUV422PToYuy2Wrapper(SwsContext *c, const uint8_t* src[], int srcStride[], int srcSliceY,

  1943.                                 int srcSliceH, uint8_t* dstParam[], int dstStride[])

  1944. {

  1945.     uint8_t *dst=dstParam[0] + dstStride[0]*srcSliceY;

  1946. 

  1947.     yuv422ptoyuy2(src[0],src[1],src[2],dst,c->srcW,srcSliceH,srcStride[0],srcStride[1],dstStride[0]);

  1948. 

  1949.     return srcSliceH;

  1950. }

  1951. 

  1952. static int YUV422PToUyvyWrapper(SwsContext *c, const uint8_t* src[], int srcStride[], int srcSliceY,

  1953.                                 int srcSliceH, uint8_t* dstParam[], int dstStride[])

  1954. {

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

  1956. 

  1957.     yuv422ptouyvy(src[0],src[1],src[2],dst,c->srcW,srcSliceH,srcStride[0],srcStride[1],dstStride[0]);

  1958. 

  1959.     return srcSliceH;

  1960. }

  1961. 

  1962. static int YUYV2YUV420Wrapper(SwsContext *c, const uint8_t* src[], int srcStride[], int srcSliceY,

  1963.                                int srcSliceH, uint8_t* dstParam[], int dstStride[])

  1964. {

  1965.     uint8_t *ydst=dstParam[0] + dstStride[0]*srcSliceY;

  1966.     uint8_t *udst=dstParam[1] + dstStride[1]*srcSliceY/2;

  1967.     uint8_t *vdst=dstParam[2] + dstStride[2]*srcSliceY/2;

  1968. 

  1969.     yuyvtoyuv420(ydst, udst, vdst, src[0], c->srcW, srcSliceH, dstStride[0], dstStride[1], srcStride[0]);

  1970. 

  1971.     if (dstParam[3])

  1972.         fillPlane(dstParam[3], dstStride[3], c->srcW, srcSliceH, srcSliceY, 255);

  1973. 

  1974.     return srcSliceH;

  1975. }

  1976. 

  1977. static int YUYV2YUV422Wrapper(SwsContext *c, const uint8_t* src[], int srcStride[], int srcSliceY,

  1978.                                int srcSliceH, uint8_t* dstParam[], int dstStride[])

  1979. {

  1980.     uint8_t *ydst=dstParam[0] + dstStride[0]*srcSliceY;

  1981.     uint8_t *udst=dstParam[1] + dstStride[1]*srcSliceY;

  1982.     uint8_t *vdst=dstParam[2] + dstStride[2]*srcSliceY;

  1983. 

  1984.     yuyvtoyuv422(ydst, udst, vdst, src[0], c->srcW, srcSliceH, dstStride[0], dstStride[1], srcStride[0]);

  1985. 

  1986.     return srcSliceH;

  1987. }

  1988. 

  1989. static int UYVY2YUV420Wrapper(SwsContext *c, const uint8_t* src[], int srcStride[], int srcSliceY,

  1990.                                int srcSliceH, uint8_t* dstParam[], int dstStride[])

  1991. {

  1992.     uint8_t *ydst=dstParam[0] + dstStride[0]*srcSliceY;

  1993.     uint8_t *udst=dstParam[1] + dstStride[1]*srcSliceY/2;

  1994.     uint8_t *vdst=dstParam[2] + dstStride[2]*srcSliceY/2;

  1995. 

  1996.     uyvytoyuv420(ydst, udst, vdst, src[0], c->srcW, srcSliceH, dstStride[0], dstStride[1], srcStride[0]);

  1997. 

  1998.     if (dstParam[3])

  1999.         fillPlane(dstParam[3], dstStride[3], c->srcW, srcSliceH, srcSliceY, 255);

  2000. 

  2001.     return srcSliceH;

  2002. }

  2003. 

  2004. static int UYVY2YUV422Wrapper(SwsContext *c, const uint8_t* src[], int srcStride[], int srcSliceY,

  2005.                                int srcSliceH, uint8_t* dstParam[], int dstStride[])

  2006. {

  2007.     uint8_t *ydst=dstParam[0] + dstStride[0]*srcSliceY;

  2008.     uint8_t *udst=dstParam[1] + dstStride[1]*srcSliceY;

  2009.     uint8_t *vdst=dstParam[2] + dstStride[2]*srcSliceY;

  2010. 

  2011.     uyvytoyuv422(ydst, udst, vdst, src[0], c->srcW, srcSliceH, dstStride[0], dstStride[1], srcStride[0]);

  2012. 

  2013.     return srcSliceH;

  2014. }

  2015. 

  2016. static int pal2rgbWrapper(SwsContext *c, const uint8_t* src[], int srcStride[], int srcSliceY,

  2017.                           int srcSliceH, uint8_t* dst[], int dstStride[])

  2018. {

  2019.     const enum PixelFormat srcFormat= c->srcFormat;

  2020.     const enum PixelFormat dstFormat= c->dstFormat;

  2021.     void (*conv)(const uint8_t *src, uint8_t *dst, long num_pixels,

  2022.                  const uint8_t *palette)=NULL;

  2023.     int i;

  2024.     uint8_t *dstPtr= dst[0] + dstStride[0]*srcSliceY;

  2025.     const uint8_t *srcPtr= src[0];

  2026. 

  2027.     if (usePal(srcFormat)) {

  2028.         switch (dstFormat) {

  2029.         case PIX_FMT_RGB32  : conv = palette8topacked32; break;

  2030.         case PIX_FMT_BGR32  : conv = palette8topacked32; break;

  2031.         case PIX_FMT_BGR32_1: conv = palette8topacked32; break;

  2032.         case PIX_FMT_RGB32_1: conv = palette8topacked32; break;

  2033.         case PIX_FMT_RGB24  : conv = palette8topacked24; break;

  2034.         case PIX_FMT_BGR24  : conv = palette8topacked24; break;

  2035.         }

  2036.     }

  2037. 

  2038.     if (!conv)

  2039.         av_log(c, AV_LOG_ERROR, "internal error %s -> %s converter\n",

  2040.                sws_format_name(srcFormat), sws_format_name(dstFormat));

  2041.     else {

  2042.         for (i=0; i<srcSliceH; i++) {

  2043.             conv(srcPtr, dstPtr, c->srcW, (uint8_t *) c->pal_rgb);

  2044.             srcPtr+= srcStride[0];

  2045.             dstPtr+= dstStride[0];

  2046.         }

  2047.     }

  2048. 

  2049.     return srcSliceH;

  2050. }

  2051. 

  2052. /* {RGB,BGR}{15,16,24,32,32_1} -> {RGB,BGR}{15,16,24,32} */

  2053. static int rgb2rgbWrapper(SwsContext *c, const uint8_t* src[], int srcStride[], int srcSliceY,

  2054.                           int srcSliceH, uint8_t* dst[], int dstStride[])

  2055. {

  2056.     const enum PixelFormat srcFormat= c->srcFormat;

  2057.     const enum PixelFormat dstFormat= c->dstFormat;

  2058.     const int srcBpp= (fmt_depth(srcFormat) + 7) >> 3;

  2059.     const int dstBpp= (fmt_depth(dstFormat) + 7) >> 3;

  2060.     const int srcId= fmt_depth(srcFormat) >> 2; /* 1:0, 4:1, 8:2, 15:3, 16:4, 24:6, 32:8 */

  2061.     const int dstId= fmt_depth(dstFormat) >> 2;

  2062.     void (*conv)(const uint8_t *src, uint8_t *dst, long src_size)=NULL;

  2063. 

  2064.     /* BGR -> BGR */

  2065.     if (  (isBGR(srcFormat) && isBGR(dstFormat))

  2066.        || (isRGB(srcFormat) && isRGB(dstFormat))) {

  2067.         switch(srcId | (dstId<<4)) {

  2068.         case 0x34: conv= rgb16to15; break;

  2069.         case 0x36: conv= rgb24to15; break;

  2070.         case 0x38: conv= rgb32to15; break;

  2071.         case 0x43: conv= rgb15to16; break;

  2072.         case 0x46: conv= rgb24to16; break;

  2073.         case 0x48: conv= rgb32to16; break;

  2074.         case 0x63: conv= rgb15to24; break;

  2075.         case 0x64: conv= rgb16to24; break;

  2076.         case 0x68: conv= rgb32to24; break;

  2077.         case 0x83: conv= rgb15to32; break;

  2078.         case 0x84: conv= rgb16to32; break;

  2079.         case 0x86: conv= rgb24to32; break;

  2080.         }

  2081.     } else if (  (isBGR(srcFormat) && isRGB(dstFormat))

  2082.              || (isRGB(srcFormat) && isBGR(dstFormat))) {

  2083.         switch(srcId | (dstId<<4)) {

  2084.         case 0x33: conv= rgb15tobgr15; break;

  2085.         case 0x34: conv= rgb16tobgr15; break;

  2086.         case 0x36: conv= rgb24tobgr15; break;

  2087.         case 0x38: conv= rgb32tobgr15; break;

  2088.         case 0x43: conv= rgb15tobgr16; break;

  2089.         case 0x44: conv= rgb16tobgr16; break;

  2090.         case 0x46: conv= rgb24tobgr16; break;

  2091.         case 0x48: conv= rgb32tobgr16; break;

  2092.         case 0x63: conv= rgb15tobgr24; break;

  2093.         case 0x64: conv= rgb16tobgr24; break;

  2094.         case 0x66: conv= rgb24tobgr24; break;

  2095.         case 0x68: conv= rgb32tobgr24; break;

  2096.         case 0x83: conv= rgb15tobgr32; break;

  2097.         case 0x84: conv= rgb16tobgr32; break;

  2098.         case 0x86: conv= rgb24tobgr32; break;

  2099.         case 0x88: conv= rgb32tobgr32; break;

  2100.         }

  2101.     }

  2102. 

  2103.     if (!conv) {

  2104.         av_log(c, AV_LOG_ERROR, "internal error %s -> %s converter\n",

  2105.                sws_format_name(srcFormat), sws_format_name(dstFormat));

  2106.     } else {

  2107.         const uint8_t *srcPtr= src[0];

  2108.         if(srcFormat == PIX_FMT_RGB32_1 || srcFormat == PIX_FMT_BGR32_1)

  2109.             srcPtr += ALT32_CORR;

  2110. 

  2111.         if (dstStride[0]*srcBpp == srcStride[0]*dstBpp && srcStride[0] > 0)

  2112.             conv(srcPtr, dst[0] + dstStride[0]*srcSliceY, srcSliceH*srcStride[0]);

  2113.         else {

  2114.             int i;

  2115.             uint8_t *dstPtr= dst[0] + dstStride[0]*srcSliceY;

  2116. 

  2117.             for (i=0; i<srcSliceH; i++) {

  2118.                 conv(srcPtr, dstPtr, c->srcW*srcBpp);

  2119.                 srcPtr+= srcStride[0];

  2120.                 dstPtr+= dstStride[0];

  2121.             }

  2122.         }

  2123.     }

  2124.     return srcSliceH;

  2125. }

  2126. 

  2127. static int bgr24toyv12Wrapper(SwsContext *c, const uint8_t* src[], int srcStride[], int srcSliceY,

  2128.                               int srcSliceH, uint8_t* dst[], int dstStride[])

  2129. {

  2130.     rgb24toyv12(

  2131.         src[0],

  2132.         dst[0]+ srcSliceY    *dstStride[0],

  2133.         dst[1]+(srcSliceY>>1)*dstStride[1],

  2134.         dst[2]+(srcSliceY>>1)*dstStride[2],

  2135.         c->srcW, srcSliceH,

  2136.         dstStride[0], dstStride[1], srcStride[0]);

  2137.     if (dst[3])

  2138.         fillPlane(dst[3], dstStride[3], c->srcW, srcSliceH, srcSliceY, 255);

  2139.     return srcSliceH;

  2140. }

  2141. 

  2142. static int yvu9toyv12Wrapper(SwsContext *c, const uint8_t* src[], int srcStride[], int srcSliceY,

  2143.                              int srcSliceH, uint8_t* dst[], int dstStride[])

  2144. {

  2145.     int i;

  2146. 

  2147.     /* copy Y */

  2148.     if (srcStride[0]==dstStride[0] && srcStride[0] > 0)

  2149.         memcpy(dst[0]+ srcSliceY*dstStride[0], src[0], srcStride[0]*srcSliceH);

  2150.     else {

  2151.         const uint8_t *srcPtr= src[0];

  2152.         uint8_t *dstPtr= dst[0] + dstStride[0]*srcSliceY;

  2153. 

  2154.         for (i=0; i<srcSliceH; i++) {

  2155.             memcpy(dstPtr, srcPtr, c->srcW);

  2156.             srcPtr+= srcStride[0];

  2157.             dstPtr+= dstStride[0];

  2158.         }

  2159.     }

  2160. 

  2161.     if (c->dstFormat==PIX_FMT_YUV420P || c->dstFormat==PIX_FMT_YUVA420P) {

  2162.         planar2x(src[1], dst[1] + dstStride[1]*(srcSliceY >> 1), c->chrSrcW,

  2163.                  srcSliceH >> 2, srcStride[1], dstStride[1]);

  2164.         planar2x(src[2], dst[2] + dstStride[2]*(srcSliceY >> 1), c->chrSrcW,

  2165.                  srcSliceH >> 2, srcStride[2], dstStride[2]);

  2166.     } else {

  2167.         planar2x(src[1], dst[2] + dstStride[2]*(srcSliceY >> 1), c->chrSrcW,

  2168.                  srcSliceH >> 2, srcStride[1], dstStride[2]);

  2169.         planar2x(src[2], dst[1] + dstStride[1]*(srcSliceY >> 1), c->chrSrcW,

  2170.                  srcSliceH >> 2, srcStride[2], dstStride[1]);

  2171.     }

  2172.     if (dst[3])

  2173.         fillPlane(dst[3], dstStride[3], c->srcW, srcSliceH, srcSliceY, 255);

  2174.     return srcSliceH;

  2175. }

  2176. 

  2177. /* unscaled copy like stuff (assumes nearly identical formats) */

  2178. static int packedCopy(SwsContext *c, const uint8_t* src[], int srcStride[], int srcSliceY,

  2179.                       int srcSliceH, uint8_t* dst[], int dstStride[])

  2180. {

  2181.     if (dstStride[0]==srcStride[0] && srcStride[0] > 0)

  2182.         memcpy(dst[0] + dstStride[0]*srcSliceY, src[0], srcSliceH*dstStride[0]);

  2183.     else {

  2184.         int i;

  2185.         const uint8_t *srcPtr= src[0];

  2186.         uint8_t *dstPtr= dst[0] + dstStride[0]*srcSliceY;

  2187.         int length=0;

  2188. 

  2189.         /* universal length finder */

  2190.         while(length+c->srcW <= FFABS(dstStride[0])

  2191.            && length+c->srcW <= FFABS(srcStride[0])) length+= c->srcW;

  2192.         assert(length!=0);

  2193. 

  2194.         for (i=0; i<srcSliceH; i++) {

  2195.             memcpy(dstPtr, srcPtr, length);

  2196.             srcPtr+= srcStride[0];

  2197.             dstPtr+= dstStride[0];

  2198.         }

  2199.     }

  2200.     return srcSliceH;

  2201. }

  2202. 

  2203. static int planarCopy(SwsContext *c, const uint8_t* src[], int srcStride[], int srcSliceY,

  2204.                       int srcSliceH, uint8_t* dst[], int dstStride[])

  2205. {

  2206.     int plane, i, j;

  2207.     for (plane=0; plane<4; plane++) {

  2208.         int length= (plane==0 || plane==3) ? c->srcW  : -((-c->srcW  )>>c->chrDstHSubSample);

  2209.         int y=      (plane==0 || plane==3) ? srcSliceY: -((-srcSliceY)>>c->chrDstVSubSample);

  2210.         int height= (plane==0 || plane==3) ? srcSliceH: -((-srcSliceH)>>c->chrDstVSubSample);

  2211.         const uint8_t *srcPtr= src[plane];

  2212.         uint8_t *dstPtr= dst[plane] + dstStride[plane]*y;

  2213. 

  2214.         if (!dst[plane]) continue;

  2215.         // ignore palette for GRAY8

  2216.         if (plane == 1 && !dst[2]) continue;

  2217.         if (!src[plane] || (plane == 1 && !src[2])) {

  2218.             if(is16BPS(c->dstFormat))

  2219.                 length*=2;

  2220.             fillPlane(dst[plane], dstStride[plane], length, height, y, (plane==3) ? 255 : 128);

  2221.         } else {

  2222.             if(is16BPS(c->srcFormat) && !is16BPS(c->dstFormat)) {

  2223.                 if (!isBE(c->srcFormat)) srcPtr++;

  2224.                 for (i=0; i<height; i++) {

  2225.                     for (j=0; j<length; j++) dstPtr[j] = srcPtr[j<<1];

  2226.                     srcPtr+= srcStride[plane];

  2227.                     dstPtr+= dstStride[plane];

  2228.                 }

  2229.             } else if(!is16BPS(c->srcFormat) && is16BPS(c->dstFormat)) {

  2230.                 for (i=0; i<height; i++) {

  2231.                     for (j=0; j<length; j++) {

  2232.                         dstPtr[ j<<1   ] = srcPtr[j];

  2233.                         dstPtr[(j<<1)+1] = srcPtr[j];

  2234.                     }

  2235.                     srcPtr+= srcStride[plane];

  2236.                     dstPtr+= dstStride[plane];

  2237.                 }

  2238.             } else if(is16BPS(c->srcFormat) && is16BPS(c->dstFormat)

  2239.                   && isBE(c->srcFormat) != isBE(c->dstFormat)) {

  2240. 

  2241.                 for (i=0; i<height; i++) {

  2242.                     for (j=0; j<length; j++)

  2243.                         ((uint16_t*)dstPtr)[j] = bswap_16(((const uint16_t*)srcPtr)[j]);

  2244.                     srcPtr+= srcStride[plane];

  2245.                     dstPtr+= dstStride[plane];

  2246.                 }

  2247.             } else if (dstStride[plane]==srcStride[plane] && srcStride[plane] > 0)

  2248.                 memcpy(dst[plane] + dstStride[plane]*y, src[plane], height*dstStride[plane]);

  2249.             else {

  2250.                 if(is16BPS(c->srcFormat) && is16BPS(c->dstFormat))

  2251.                     length*=2;

  2252.                 for (i=0; i<height; i++) {

  2253.                     memcpy(dstPtr, srcPtr, length);

  2254.                     srcPtr+= srcStride[plane];

  2255.                     dstPtr+= dstStride[plane];

  2256.                 }

  2257.             }

  2258.         }

  2259.     }

  2260.     return srcSliceH;

  2261. }

  2262. 

  2263. static void getSubSampleFactors(int *h, int *v, enum PixelFormat format)

  2264. {

  2265.     *h = av_pix_fmt_descriptors[format].log2_chroma_w;

  2266.     *v = av_pix_fmt_descriptors[format].log2_chroma_h;

  2267. }

  2268. 

  2269. static uint16_t roundToInt16(int64_t f)

  2270. {

  2271.     int r= (f + (1<<15))>>16;

  2272.          if (r<-0x7FFF) return 0x8000;

  2273.     else if (r> 0x7FFF) return 0x7FFF;

  2274.     else                return r;

  2275. }

  2276. 

  2277. int sws_setColorspaceDetails(SwsContext *c, const int inv_table[4], int srcRange, const int table[4], int dstRange, int brightness, int contrast, int saturation)

  2278. {

  2279.     int64_t crv =  inv_table[0];

  2280.     int64_t cbu =  inv_table[1];

  2281.     int64_t cgu = -inv_table[2];

  2282.     int64_t cgv = -inv_table[3];

  2283.     int64_t cy  = 1<<16;

  2284.     int64_t oy  = 0;

  2285. 

  2286.     memcpy(c->srcColorspaceTable, inv_table, sizeof(int)*4);

  2287.     memcpy(c->dstColorspaceTable,     table, sizeof(int)*4);

  2288. 

  2289.     c->brightness= brightness;

  2290.     c->contrast  = contrast;

  2291.     c->saturation= saturation;

  2292.     c->srcRange  = srcRange;

  2293.     c->dstRange  = dstRange;

  2294.     if (isYUV(c->dstFormat) || isGray(c->dstFormat)) return -1;

  2295. 

  2296.     c->uOffset=   0x0400040004000400LL;

  2297.     c->vOffset=   0x0400040004000400LL;

  2298. 

  2299.     if (!srcRange) {

  2300.         cy= (cy*255) / 219;

  2301.         oy= 16<<16;

  2302.     } else {

  2303.         crv= (crv*224) / 255;

  2304.         cbu= (cbu*224) / 255;

  2305.         cgu= (cgu*224) / 255;

  2306.         cgv= (cgv*224) / 255;

  2307.     }

  2308. 

  2309.     cy = (cy *contrast             )>>16;

  2310.     crv= (crv*contrast * saturation)>>32;

  2311.     cbu= (cbu*contrast * saturation)>>32;

  2312.     cgu= (cgu*contrast * saturation)>>32;

  2313.     cgv= (cgv*contrast * saturation)>>32;

  2314. 

  2315.     oy -= 256*brightness;

  2316. 

  2317.     c->yCoeff=    roundToInt16(cy *8192) * 0x0001000100010001ULL;

  2318.     c->vrCoeff=   roundToInt16(crv*8192) * 0x0001000100010001ULL;

  2319.     c->ubCoeff=   roundToInt16(cbu*8192) * 0x0001000100010001ULL;

  2320.     c->vgCoeff=   roundToInt16(cgv*8192) * 0x0001000100010001ULL;

  2321.     c->ugCoeff=   roundToInt16(cgu*8192) * 0x0001000100010001ULL;

  2322.     c->yOffset=   roundToInt16(oy *   8) * 0x0001000100010001ULL;

  2323. 

  2324.     c->yuv2rgb_y_coeff  = (int16_t)roundToInt16(cy <<13);

  2325.     c->yuv2rgb_y_offset = (int16_t)roundToInt16(oy << 9);

  2326.     c->yuv2rgb_v2r_coeff= (int16_t)roundToInt16(crv<<13);

  2327.     c->yuv2rgb_v2g_coeff= (int16_t)roundToInt16(cgv<<13);

  2328.     c->yuv2rgb_u2g_coeff= (int16_t)roundToInt16(cgu<<13);

  2329.     c->yuv2rgb_u2b_coeff= (int16_t)roundToInt16(cbu<<13);

  2330. 

  2331.     ff_yuv2rgb_c_init_tables(c, inv_table, srcRange, brightness, contrast, saturation);

  2332.     //FIXME factorize

  2333. 

  2334. #ifdef COMPILE_ALTIVEC

  2335.     if (c->flags & SWS_CPU_CAPS_ALTIVEC)

  2336.         ff_yuv2rgb_init_tables_altivec(c, inv_table, brightness, contrast, saturation);

  2337. #endif

  2338.     return 0;

  2339. }

  2340. 

  2341. int sws_getColorspaceDetails(SwsContext *c, int **inv_table, int *srcRange, int **table, int *dstRange, int *brightness, int *contrast, int *saturation)

  2342. {

  2343.     if (isYUV(c->dstFormat) || isGray(c->dstFormat)) return -1;

  2344. 

  2345.     *inv_table = c->srcColorspaceTable;

  2346.     *table     = c->dstColorspaceTable;

  2347.     *srcRange  = c->srcRange;

  2348.     *dstRange  = c->dstRange;

  2349.     *brightness= c->brightness;

  2350.     *contrast  = c->contrast;

  2351.     *saturation= c->saturation;

  2352. 

  2353.     return 0;

  2354. }

  2355. 

  2356. static int handle_jpeg(enum PixelFormat *format)

  2357. {

  2358.     switch (*format) {

  2359.     case PIX_FMT_YUVJ420P:

  2360.         *format = PIX_FMT_YUV420P;

  2361.         return 1;

  2362.     case PIX_FMT_YUVJ422P:

  2363.         *format = PIX_FMT_YUV422P;

  2364.         return 1;

  2365.     case PIX_FMT_YUVJ444P:

  2366.         *format = PIX_FMT_YUV444P;

  2367.         return 1;

  2368.     case PIX_FMT_YUVJ440P:

  2369.         *format = PIX_FMT_YUV440P;

  2370.         return 1;

  2371.     default:

  2372.         return 0;

  2373.     }

  2374. }

  2375. 

  2376. SwsContext *sws_getContext(int srcW, int srcH, enum PixelFormat srcFormat, int dstW, int dstH, enum PixelFormat dstFormat, int flags,

  2377.                            SwsFilter *srcFilter, SwsFilter *dstFilter, const double *param)

  2378. {

  2379. 

  2380.     SwsContext *c;

  2381.     int i;

  2382.     int usesVFilter, usesHFilter;

  2383.     int unscaled, needsDither;

  2384.     int srcRange, dstRange;

  2385.     SwsFilter dummyFilter= {NULL, NULL, NULL, NULL};

  2386. #if ARCH_X86

  2387.     if (flags & SWS_CPU_CAPS_MMX)

  2388.         __asm__ volatile("emms\n\t"::: "memory");

  2389. #endif

  2390. 

  2391. #if !CONFIG_RUNTIME_CPUDETECT //ensure that the flags match the compiled variant if cpudetect is off

  2392.     flags &= ~(SWS_CPU_CAPS_MMX|SWS_CPU_CAPS_MMX2|SWS_CPU_CAPS_3DNOW|SWS_CPU_CAPS_ALTIVEC|SWS_CPU_CAPS_BFIN);

  2393. #if   COMPILE_TEMPLATE_MMX2

  2394.     flags |= SWS_CPU_CAPS_MMX|SWS_CPU_CAPS_MMX2;

  2395. #elif COMPILE_TEMPLATE_AMD3DNOW

  2396.     flags |= SWS_CPU_CAPS_MMX|SWS_CPU_CAPS_3DNOW;

  2397. #elif COMPILE_TEMPLATE_MMX

  2398.     flags |= SWS_CPU_CAPS_MMX;

  2399. #elif COMPILE_TEMPLATE_ALTIVEC

  2400.     flags |= SWS_CPU_CAPS_ALTIVEC;

  2401. #elif ARCH_BFIN

  2402.     flags |= SWS_CPU_CAPS_BFIN;

  2403. #endif

  2404. #endif /* CONFIG_RUNTIME_CPUDETECT */

  2405.     if (!rgb15to16) sws_rgb2rgb_init(flags);

  2406. 

  2407.     unscaled = (srcW == dstW && srcH == dstH);

  2408.     needsDither= (isBGR(dstFormat) || isRGB(dstFormat))

  2409.         && (fmt_depth(dstFormat))<24

  2410.         && ((fmt_depth(dstFormat))<(fmt_depth(srcFormat)) || (!(isRGB(srcFormat) || isBGR(srcFormat))));

  2411. 

  2412.     srcRange = handle_jpeg(&srcFormat);

  2413.     dstRange = handle_jpeg(&dstFormat);

  2414. 

  2415.     if (!isSupportedIn(srcFormat)) {

  2416.         av_log(NULL, AV_LOG_ERROR, "swScaler: %s is not supported as input pixel format\n", sws_format_name(srcFormat));

  2417.         return NULL;

  2418.     }

  2419.     if (!isSupportedOut(dstFormat)) {

  2420.         av_log(NULL, AV_LOG_ERROR, "swScaler: %s is not supported as output pixel format\n", sws_format_name(dstFormat));

  2421.         return NULL;

  2422.     }

  2423. 

  2424.     i= flags & ( SWS_POINT

  2425.                 |SWS_AREA

  2426.                 |SWS_BILINEAR

  2427.                 |SWS_FAST_BILINEAR

  2428.                 |SWS_BICUBIC

  2429.                 |SWS_X

  2430.                 |SWS_GAUSS

  2431.                 |SWS_LANCZOS

  2432.                 |SWS_SINC

  2433.                 |SWS_SPLINE

  2434.                 |SWS_BICUBLIN);

  2435.     if(!i || (i & (i-1))) {

  2436.         av_log(NULL, AV_LOG_ERROR, "swScaler: Exactly one scaler algorithm must be chosen\n");

  2437.         return NULL;

  2438.     }

  2439. 

  2440.     /* sanity check */

  2441.     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

  2442.         av_log(NULL, AV_LOG_ERROR, "swScaler: %dx%d -> %dx%d is invalid scaling dimension\n",

  2443.                srcW, srcH, dstW, dstH);

  2444.         return NULL;

  2445.     }

  2446.     if(srcW > VOFW || dstW > VOFW) {

  2447.         av_log(NULL, AV_LOG_ERROR, "swScaler: Compile-time maximum width is "AV_STRINGIFY(VOFW)" change VOF/VOFW and recompile\n");

  2448.         return NULL;

  2449.     }

  2450. 

  2451.     if (!dstFilter) dstFilter= &dummyFilter;

  2452.     if (!srcFilter) srcFilter= &dummyFilter;

  2453. 

  2454.     FF_ALLOCZ_OR_GOTO(NULL, c, sizeof(SwsContext), fail);

  2455. 

  2456.     c->av_class = &sws_context_class;

  2457.     c->srcW= srcW;

  2458.     c->srcH= srcH;

  2459.     c->dstW= dstW;

  2460.     c->dstH= dstH;

  2461.     c->lumXInc= ((srcW<<16) + (dstW>>1))/dstW;

  2462.     c->lumYInc= ((srcH<<16) + (dstH>>1))/dstH;

  2463.     c->flags= flags;

  2464.     c->dstFormat= dstFormat;

  2465.     c->srcFormat= srcFormat;

  2466.     c->vRounder= 4* 0x0001000100010001ULL;

  2467. 

  2468.     usesHFilter= usesVFilter= 0;

  2469.     if (dstFilter->lumV && dstFilter->lumV->length>1) usesVFilter=1;

  2470.     if (dstFilter->lumH && dstFilter->lumH->length>1) usesHFilter=1;

  2471.     if (dstFilter->chrV && dstFilter->chrV->length>1) usesVFilter=1;

  2472.     if (dstFilter->chrH && dstFilter->chrH->length>1) usesHFilter=1;

  2473.     if (srcFilter->lumV && srcFilter->lumV->length>1) usesVFilter=1;

  2474.     if (srcFilter->lumH && srcFilter->lumH->length>1) usesHFilter=1;

  2475.     if (srcFilter->chrV && srcFilter->chrV->length>1) usesVFilter=1;

  2476.     if (srcFilter->chrH && srcFilter->chrH->length>1) usesHFilter=1;

  2477. 

  2478.     getSubSampleFactors(&c->chrSrcHSubSample, &c->chrSrcVSubSample, srcFormat);

  2479.     getSubSampleFactors(&c->chrDstHSubSample, &c->chrDstVSubSample, dstFormat);

  2480. 

  2481.     // reuse chroma for 2 pixels RGB/BGR unless user wants full chroma interpolation

  2482.     if ((isBGR(dstFormat) || isRGB(dstFormat)) && !(flags&SWS_FULL_CHR_H_INT)) c->chrDstHSubSample=1;

  2483. 

  2484.     // drop some chroma lines if the user wants it

  2485.     c->vChrDrop= (flags&SWS_SRC_V_CHR_DROP_MASK)>>SWS_SRC_V_CHR_DROP_SHIFT;

  2486.     c->chrSrcVSubSample+= c->vChrDrop;

  2487. 

  2488.     // drop every other pixel for chroma calculation unless user wants full chroma

  2489.     if ((isBGR(srcFormat) || isRGB(srcFormat)) && !(flags&SWS_FULL_CHR_H_INP)

  2490.       && srcFormat!=PIX_FMT_RGB8      && srcFormat!=PIX_FMT_BGR8

  2491.       && srcFormat!=PIX_FMT_RGB4      && srcFormat!=PIX_FMT_BGR4

  2492.       && srcFormat!=PIX_FMT_RGB4_BYTE && srcFormat!=PIX_FMT_BGR4_BYTE

  2493.       && ((dstW>>c->chrDstHSubSample) <= (srcW>>1) || (flags&(SWS_FAST_BILINEAR|SWS_POINT))))

  2494.         c->chrSrcHSubSample=1;

  2495. 

  2496.     if (param) {

  2497.         c->param[0] = param[0];

  2498.         c->param[1] = param[1];

  2499.     } else {

  2500.         c->param[0] =

  2501.         c->param[1] = SWS_PARAM_DEFAULT;

  2502.     }

  2503. 

  2504.     // Note the -((-x)>>y) is so that we always round toward +inf.

  2505.     c->chrSrcW= -((-srcW) >> c->chrSrcHSubSample);

  2506.     c->chrSrcH= -((-srcH) >> c->chrSrcVSubSample);

  2507.     c->chrDstW= -((-dstW) >> c->chrDstHSubSample);

  2508.     c->chrDstH= -((-dstH) >> c->chrDstVSubSample);

  2509. 

  2510.     sws_setColorspaceDetails(c, ff_yuv2rgb_coeffs[SWS_CS_DEFAULT], srcRange, ff_yuv2rgb_coeffs[SWS_CS_DEFAULT] /* FIXME*/, dstRange, 0, 1<<16, 1<<16);

  2511. 

  2512.     /* unscaled special cases */

  2513.     if (unscaled && !usesHFilter && !usesVFilter && (srcRange == dstRange || isBGR(dstFormat) || isRGB(dstFormat))) {

  2514.         /* yv12_to_nv12 */

  2515.         if ((srcFormat == PIX_FMT_YUV420P || srcFormat == PIX_FMT_YUVA420P) && (dstFormat == PIX_FMT_NV12 || dstFormat == PIX_FMT_NV21)) {

  2516.             c->swScale= PlanarToNV12Wrapper;

  2517.         }

  2518.         /* yuv2bgr */

  2519.         if ((srcFormat==PIX_FMT_YUV420P || srcFormat==PIX_FMT_YUV422P || srcFormat==PIX_FMT_YUVA420P) && (isBGR(dstFormat) || isRGB(dstFormat))

  2520.             && !(flags & SWS_ACCURATE_RND) && !(dstH&1)) {

  2521.             c->swScale= ff_yuv2rgb_get_func_ptr(c);

  2522.         }

  2523. 

  2524.         if (srcFormat==PIX_FMT_YUV410P && (dstFormat==PIX_FMT_YUV420P || dstFormat==PIX_FMT_YUVA420P) && !(flags & SWS_BITEXACT)) {

  2525.             c->swScale= yvu9toyv12Wrapper;

  2526.         }

  2527. 

  2528.         /* bgr24toYV12 */

  2529.         if (srcFormat==PIX_FMT_BGR24 && (dstFormat==PIX_FMT_YUV420P || dstFormat==PIX_FMT_YUVA420P) && !(flags & SWS_ACCURATE_RND))

  2530.             c->swScale= bgr24toyv12Wrapper;

  2531. 

  2532.         /* RGB/BGR -> RGB/BGR (no dither needed forms) */

  2533.         if (  (isBGR(srcFormat) || isRGB(srcFormat))

  2534.            && (isBGR(dstFormat) || isRGB(dstFormat))

  2535.            && srcFormat != PIX_FMT_BGR8      && dstFormat != PIX_FMT_BGR8

  2536.            && srcFormat != PIX_FMT_RGB8      && dstFormat != PIX_FMT_RGB8

  2537.            && srcFormat != PIX_FMT_BGR4      && dstFormat != PIX_FMT_BGR4

  2538.            && srcFormat != PIX_FMT_RGB4      && dstFormat != PIX_FMT_RGB4

  2539.            && srcFormat != PIX_FMT_BGR4_BYTE && dstFormat != PIX_FMT_BGR4_BYTE

  2540.            && srcFormat != PIX_FMT_RGB4_BYTE && dstFormat != PIX_FMT_RGB4_BYTE

  2541.            && srcFormat != PIX_FMT_MONOBLACK && dstFormat != PIX_FMT_MONOBLACK

  2542.            && srcFormat != PIX_FMT_MONOWHITE && dstFormat != PIX_FMT_MONOWHITE

  2543.                                              && dstFormat != PIX_FMT_RGB32_1

  2544.                                              && dstFormat != PIX_FMT_BGR32_1

  2545.            && srcFormat != PIX_FMT_RGB48LE   && dstFormat != PIX_FMT_RGB48LE

  2546.            && srcFormat != PIX_FMT_RGB48BE   && dstFormat != PIX_FMT_RGB48BE

  2547.            && (!needsDither || (c->flags&(SWS_FAST_BILINEAR|SWS_POINT))))

  2548.              c->swScale= rgb2rgbWrapper;

  2549. 

  2550.         if ((usePal(srcFormat) && (

  2551.                  dstFormat == PIX_FMT_RGB32   ||

  2552.                  dstFormat == PIX_FMT_RGB32_1 ||

  2553.                  dstFormat == PIX_FMT_RGB24   ||

  2554.                  dstFormat == PIX_FMT_BGR32   ||

  2555.                  dstFormat == PIX_FMT_BGR32_1 ||

  2556.                  dstFormat == PIX_FMT_BGR24)))

  2557.              c->swScale= pal2rgbWrapper;

  2558. 

  2559.         if (srcFormat == PIX_FMT_YUV422P) {

  2560.             if (dstFormat == PIX_FMT_YUYV422)

  2561.                 c->swScale= YUV422PToYuy2Wrapper;

  2562.             else if (dstFormat == PIX_FMT_UYVY422)

  2563.                 c->swScale= YUV422PToUyvyWrapper;

  2564.         }

  2565. 

  2566.         /* LQ converters if -sws 0 or -sws 4*/

  2567.         if (c->flags&(SWS_FAST_BILINEAR|SWS_POINT)) {

  2568.             /* yv12_to_yuy2 */

  2569.             if (srcFormat == PIX_FMT_YUV420P || srcFormat == PIX_FMT_YUVA420P) {

  2570.                 if (dstFormat == PIX_FMT_YUYV422)

  2571.                     c->swScale= PlanarToYuy2Wrapper;

  2572.                 else if (dstFormat == PIX_FMT_UYVY422)

  2573.                     c->swScale= PlanarToUyvyWrapper;

  2574.             }

  2575.         }

  2576.         if(srcFormat == PIX_FMT_YUYV422 && (dstFormat == PIX_FMT_YUV420P || dstFormat == PIX_FMT_YUVA420P))

  2577.             c->swScale= YUYV2YUV420Wrapper;

  2578.         if(srcFormat == PIX_FMT_UYVY422 && (dstFormat == PIX_FMT_YUV420P || dstFormat == PIX_FMT_YUVA420P))

  2579.             c->swScale= UYVY2YUV420Wrapper;

  2580.         if(srcFormat == PIX_FMT_YUYV422 && dstFormat == PIX_FMT_YUV422P)

  2581.             c->swScale= YUYV2YUV422Wrapper;

  2582.         if(srcFormat == PIX_FMT_UYVY422 && dstFormat == PIX_FMT_YUV422P)

  2583.             c->swScale= UYVY2YUV422Wrapper;

  2584. 

  2585. #ifdef COMPILE_ALTIVEC

  2586.         if ((c->flags & SWS_CPU_CAPS_ALTIVEC) &&

  2587.             !(c->flags & SWS_BITEXACT) &&

  2588.             srcFormat == PIX_FMT_YUV420P) {

  2589.           // unscaled YV12 -> packed YUV, we want speed

  2590.           if (dstFormat == PIX_FMT_YUYV422)

  2591.               c->swScale= yv12toyuy2_unscaled_altivec;

  2592.           else if (dstFormat == PIX_FMT_UYVY422)

  2593.               c->swScale= yv12touyvy_unscaled_altivec;

  2594.         }

  2595. #endif

  2596. 

  2597.         /* simple copy */

  2598.         if (  srcFormat == dstFormat

  2599.             || (srcFormat == PIX_FMT_YUVA420P && dstFormat == PIX_FMT_YUV420P)

  2600.             || (srcFormat == PIX_FMT_YUV420P && dstFormat == PIX_FMT_YUVA420P)

  2601.             || (isPlanarYUV(srcFormat) && isGray(dstFormat))

  2602.             || (isPlanarYUV(dstFormat) && isGray(srcFormat))

  2603.             || (isGray(dstFormat) && isGray(srcFormat))

  2604.             || (isPlanarYUV(srcFormat) && isPlanarYUV(dstFormat)

  2605.                 && c->chrDstHSubSample == c->chrSrcHSubSample

  2606.                 && c->chrDstVSubSample == c->chrSrcVSubSample

  2607.                 && dstFormat != PIX_FMT_NV12 && dstFormat != PIX_FMT_NV21

  2608.                 && srcFormat != PIX_FMT_NV12 && srcFormat != PIX_FMT_NV21))

  2609.         {

  2610.             if (isPacked(c->srcFormat))

  2611.                 c->swScale= packedCopy;

  2612.             else /* Planar YUV or gray */

  2613.                 c->swScale= planarCopy;

  2614.         }

  2615. #if ARCH_BFIN

  2616.         if (flags & SWS_CPU_CAPS_BFIN)

  2617.             ff_bfin_get_unscaled_swscale (c);

  2618. #endif

  2619. 

  2620.         if (c->swScale) {

  2621.             if (flags&SWS_PRINT_INFO)

  2622.                 av_log(c, AV_LOG_INFO, "using unscaled %s -> %s special converter\n",

  2623.                        sws_format_name(srcFormat), sws_format_name(dstFormat));

  2624.             return c;

  2625.         }

  2626.     }

  2627. 

  2628.     if (flags & SWS_CPU_CAPS_MMX2) {

  2629.         c->canMMX2BeUsed= (dstW >=srcW && (dstW&31)==0 && (srcW&15)==0) ? 1 : 0;

  2630.         if (!c->canMMX2BeUsed && dstW >=srcW && (srcW&15)==0 && (flags&SWS_FAST_BILINEAR)) {

  2631.             if (flags&SWS_PRINT_INFO)

  2632.                 av_log(c, AV_LOG_INFO, "output width is not a multiple of 32 -> no MMX2 scaler\n");

  2633.         }

  2634.         if (usesHFilter) c->canMMX2BeUsed=0;

  2635.     }

  2636.     else

  2637.         c->canMMX2BeUsed=0;

  2638. 

  2639.     c->chrXInc= ((c->chrSrcW<<16) + (c->chrDstW>>1))/c->chrDstW;

  2640.     c->chrYInc= ((c->chrSrcH<<16) + (c->chrDstH>>1))/c->chrDstH;

  2641. 

  2642.     // match pixel 0 of the src to pixel 0 of dst and match pixel n-2 of src to pixel n-2 of dst

  2643.     // but only for the FAST_BILINEAR mode otherwise do correct scaling

  2644.     // n-2 is the last chrominance sample available

  2645.     // this is not perfect, but no one should notice the difference, the more correct variant

  2646.     // would be like the vertical one, but that would require some special code for the

  2647.     // first and last pixel

  2648.     if (flags&SWS_FAST_BILINEAR) {

  2649.         if (c->canMMX2BeUsed) {

  2650.             c->lumXInc+= 20;

  2651.             c->chrXInc+= 20;

  2652.         }

  2653.         //we don't use the x86 asm scaler if MMX is available

  2654.         else if (flags & SWS_CPU_CAPS_MMX) {

  2655.             c->lumXInc = ((srcW-2)<<16)/(dstW-2) - 20;

  2656.             c->chrXInc = ((c->chrSrcW-2)<<16)/(c->chrDstW-2) - 20;

  2657.         }

  2658.     }

  2659. 

  2660.     /* precalculate horizontal scaler filter coefficients */

  2661.     {

  2662. #if defined(COMPILE_MMX2)

  2663. // can't downscale !!!

  2664.         if (c->canMMX2BeUsed && (flags & SWS_FAST_BILINEAR)) {

  2665.             c->lumMmx2FilterCodeSize = initMMX2HScaler(      dstW, c->lumXInc, NULL, NULL, NULL, 8);

  2666.             c->chrMmx2FilterCodeSize = initMMX2HScaler(c->chrDstW, c->chrXInc, NULL, NULL, NULL, 4);

  2667. 

  2668. #ifdef MAP_ANONYMOUS

  2669.             c->lumMmx2FilterCode = mmap(NULL, c->lumMmx2FilterCodeSize, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, 0, 0);

  2670.             c->chrMmx2FilterCode = mmap(NULL, c->chrMmx2FilterCodeSize, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, 0, 0);

  2671. #elif HAVE_VIRTUALALLOC

  2672.             c->lumMmx2FilterCode = VirtualAlloc(NULL, c->lumMmx2FilterCodeSize, MEM_COMMIT, PAGE_EXECUTE_READWRITE);

  2673.             c->chrMmx2FilterCode = VirtualAlloc(NULL, c->chrMmx2FilterCodeSize, MEM_COMMIT, PAGE_EXECUTE_READWRITE);

  2674. #else

  2675.             c->lumMmx2FilterCode = av_malloc(c->lumMmx2FilterCodeSize);

  2676.             c->chrMmx2FilterCode = av_malloc(c->chrMmx2FilterCodeSize);

  2677. #endif

  2678. 

  2679.             FF_ALLOCZ_OR_GOTO(c, c->hLumFilter   , (dstW        /8+8)*sizeof(int16_t), fail);

  2680.             FF_ALLOCZ_OR_GOTO(c, c->hChrFilter   , (c->chrDstW  /4+8)*sizeof(int16_t), fail);

  2681.             FF_ALLOCZ_OR_GOTO(c, c->hLumFilterPos, (dstW      /2/8+8)*sizeof(int32_t), fail);

  2682.             FF_ALLOCZ_OR_GOTO(c, c->hChrFilterPos, (c->chrDstW/2/4+8)*sizeof(int32_t), fail);

  2683. 

  2684.             initMMX2HScaler(      dstW, c->lumXInc, c->lumMmx2FilterCode, c->hLumFilter, c->hLumFilterPos, 8);

  2685.             initMMX2HScaler(c->chrDstW, c->chrXInc, c->chrMmx2FilterCode, c->hChrFilter, c->hChrFilterPos, 4);

  2686. 

  2687. #ifdef MAP_ANONYMOUS

  2688.             mprotect(c->lumMmx2FilterCode, c->lumMmx2FilterCodeSize, PROT_EXEC | PROT_READ);

  2689.             mprotect(c->chrMmx2FilterCode, c->chrMmx2FilterCodeSize, PROT_EXEC | PROT_READ);

  2690. #endif

  2691.         } else

  2692. #endif /* defined(COMPILE_MMX2) */

  2693.         {

  2694.             const int filterAlign=

  2695.                 (flags & SWS_CPU_CAPS_MMX) ? 4 :

  2696.                 (flags & SWS_CPU_CAPS_ALTIVEC) ? 8 :

  2697.                 1;

  2698. 

  2699.             if (initFilter(&c->hLumFilter, &c->hLumFilterPos, &c->hLumFilterSize, c->lumXInc,

  2700.                            srcW      ,       dstW, filterAlign, 1<<14,

  2701.                            (flags&SWS_BICUBLIN) ? (flags|SWS_BICUBIC)  : flags,

  2702.                            srcFilter->lumH, dstFilter->lumH, c->param) < 0)

  2703.                 goto fail;

  2704.             if (initFilter(&c->hChrFilter, &c->hChrFilterPos, &c->hChrFilterSize, c->chrXInc,

  2705.                            c->chrSrcW, c->chrDstW, filterAlign, 1<<14,

  2706.                            (flags&SWS_BICUBLIN) ? (flags|SWS_BILINEAR) : flags,

  2707.                            srcFilter->chrH, dstFilter->chrH, c->param) < 0)

  2708.                 goto fail;

  2709.         }

  2710.     } // initialize horizontal stuff

  2711. 

  2712.     /* precalculate vertical scaler filter coefficients */

  2713.     {

  2714.         const int filterAlign=

  2715.             (flags & SWS_CPU_CAPS_MMX) && (flags & SWS_ACCURATE_RND) ? 2 :

  2716.             (flags & SWS_CPU_CAPS_ALTIVEC) ? 8 :

  2717.             1;

  2718. 

  2719.         if (initFilter(&c->vLumFilter, &c->vLumFilterPos, &c->vLumFilterSize, c->lumYInc,

  2720.                        srcH      ,        dstH, filterAlign, (1<<12),

  2721.                        (flags&SWS_BICUBLIN) ? (flags|SWS_BICUBIC)  : flags,

  2722.                        srcFilter->lumV, dstFilter->lumV, c->param) < 0)

  2723.             goto fail;

  2724.         if (initFilter(&c->vChrFilter, &c->vChrFilterPos, &c->vChrFilterSize, c->chrYInc,

  2725.                        c->chrSrcH, c->chrDstH, filterAlign, (1<<12),

  2726.                        (flags&SWS_BICUBLIN) ? (flags|SWS_BILINEAR) : flags,

  2727.                        srcFilter->chrV, dstFilter->chrV, c->param) < 0)

  2728.             goto fail;

  2729. 

  2730. #ifdef COMPILE_ALTIVEC

  2731.         FF_ALLOC_OR_GOTO(c, c->vYCoeffsBank, sizeof (vector signed short)*c->vLumFilterSize*c->dstH, fail);

  2732.         FF_ALLOC_OR_GOTO(c, c->vCCoeffsBank, sizeof (vector signed short)*c->vChrFilterSize*c->chrDstH, fail);

  2733. 

  2734.         for (i=0;i<c->vLumFilterSize*c->dstH;i++) {

  2735.             int j;

  2736.             short *p = (short *)&c->vYCoeffsBank[i];

  2737.             for (j=0;j<8;j++)

  2738.                 p[j] = c->vLumFilter[i];

  2739.         }

  2740. 

  2741.         for (i=0;i<c->vChrFilterSize*c->chrDstH;i++) {

  2742.             int j;

  2743.             short *p = (short *)&c->vCCoeffsBank[i];

  2744.             for (j=0;j<8;j++)

  2745.                 p[j] = c->vChrFilter[i];

  2746.         }

  2747. #endif

  2748.     }

  2749. 

  2750.     // calculate buffer sizes so that they won't run out while handling these damn slices

  2751.     c->vLumBufSize= c->vLumFilterSize;

  2752.     c->vChrBufSize= c->vChrFilterSize;

  2753.     for (i=0; i<dstH; i++) {

  2754.         int chrI= i*c->chrDstH / dstH;

  2755.         int nextSlice= FFMAX(c->vLumFilterPos[i   ] + c->vLumFilterSize - 1,

  2756.                            ((c->vChrFilterPos[chrI] + c->vChrFilterSize - 1)<<c->chrSrcVSubSample));

  2757. 

  2758.         nextSlice>>= c->chrSrcVSubSample;

  2759.         nextSlice<<= c->chrSrcVSubSample;

  2760.         if (c->vLumFilterPos[i   ] + c->vLumBufSize < nextSlice)

  2761.             c->vLumBufSize= nextSlice - c->vLumFilterPos[i];

  2762.         if (c->vChrFilterPos[chrI] + c->vChrBufSize < (nextSlice>>c->chrSrcVSubSample))

  2763.             c->vChrBufSize= (nextSlice>>c->chrSrcVSubSample) - c->vChrFilterPos[chrI];

  2764.     }

  2765. 

  2766.     // allocate pixbufs (we use dynamic allocation because otherwise we would need to

  2767.     // allocate several megabytes to handle all possible cases)

  2768.     FF_ALLOC_OR_GOTO(c, c->lumPixBuf, c->vLumBufSize*2*sizeof(int16_t*), fail);

  2769.     FF_ALLOC_OR_GOTO(c, c->chrPixBuf, c->vChrBufSize*2*sizeof(int16_t*), fail);

  2770.     if (CONFIG_SWSCALE_ALPHA && isALPHA(c->srcFormat) && isALPHA(c->dstFormat))

  2771.         FF_ALLOCZ_OR_GOTO(c, c->alpPixBuf, c->vLumBufSize*2*sizeof(int16_t*), fail);

  2772.     //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)

  2773.     /* align at 16 bytes for AltiVec */

  2774.     for (i=0; i<c->vLumBufSize; i++) {

  2775.         FF_ALLOCZ_OR_GOTO(c, c->lumPixBuf[i+c->vLumBufSize], VOF+1, fail);

  2776.         c->lumPixBuf[i] = c->lumPixBuf[i+c->vLumBufSize];

  2777.     }

  2778.     for (i=0; i<c->vChrBufSize; i++) {

  2779.         FF_ALLOC_OR_GOTO(c, c->chrPixBuf[i+c->vChrBufSize], (VOF+1)*2, fail);

  2780.         c->chrPixBuf[i] = c->chrPixBuf[i+c->vChrBufSize];

  2781.     }

  2782.     if (CONFIG_SWSCALE_ALPHA && c->alpPixBuf)

  2783.         for (i=0; i<c->vLumBufSize; i++) {

  2784.             FF_ALLOCZ_OR_GOTO(c, c->alpPixBuf[i+c->vLumBufSize], VOF+1, fail);

  2785.             c->alpPixBuf[i] = c->alpPixBuf[i+c->vLumBufSize];

  2786.         }

  2787. 

  2788.     //try to avoid drawing green stuff between the right end and the stride end

  2789.     for (i=0; i<c->vChrBufSize; i++) memset(c->chrPixBuf[i], 64, (VOF+1)*2);

  2790. 

  2791.     assert(2*VOFW == VOF);

  2792. 

  2793.     assert(c->chrDstH <= dstH);

  2794. 

  2795.     if (flags&SWS_PRINT_INFO) {

  2796.         if (flags&SWS_FAST_BILINEAR)

  2797.             av_log(c, AV_LOG_INFO, "FAST_BILINEAR scaler, ");

  2798.         else if (flags&SWS_BILINEAR)

  2799.             av_log(c, AV_LOG_INFO, "BILINEAR scaler, ");

  2800.         else if (flags&SWS_BICUBIC)

  2801.             av_log(c, AV_LOG_INFO, "BICUBIC scaler, ");

  2802.         else if (flags&SWS_X)

  2803.             av_log(c, AV_LOG_INFO, "Experimental scaler, ");

  2804.         else if (flags&SWS_POINT)

  2805.             av_log(c, AV_LOG_INFO, "Nearest Neighbor / POINT scaler, ");

  2806.         else if (flags&SWS_AREA)

  2807.             av_log(c, AV_LOG_INFO, "Area Averaging scaler, ");

  2808.         else if (flags&SWS_BICUBLIN)

  2809.             av_log(c, AV_LOG_INFO, "luma BICUBIC / chroma BILINEAR scaler, ");

  2810.         else if (flags&SWS_GAUSS)

  2811.             av_log(c, AV_LOG_INFO, "Gaussian scaler, ");

  2812.         else if (flags&SWS_SINC)

  2813.             av_log(c, AV_LOG_INFO, "Sinc scaler, ");

  2814.         else if (flags&SWS_LANCZOS)

  2815.             av_log(c, AV_LOG_INFO, "Lanczos scaler, ");

  2816.         else if (flags&SWS_SPLINE)

  2817.             av_log(c, AV_LOG_INFO, "Bicubic spline scaler, ");

  2818.         else

  2819.             av_log(c, AV_LOG_INFO, "ehh flags invalid?! ");

  2820. 

  2821.         av_log(c, AV_LOG_INFO, "from %s to %s%s ",

  2822.                sws_format_name(srcFormat),

  2823. #ifdef DITHER1XBPP

  2824.                dstFormat == PIX_FMT_BGR555 || dstFormat == PIX_FMT_BGR565 ? "dithered " : "",

  2825. #else

  2826.                "",

  2827. #endif

  2828.                sws_format_name(dstFormat));

  2829. 

  2830.         if (flags & SWS_CPU_CAPS_MMX2)

  2831.             av_log(c, AV_LOG_INFO, "using MMX2\n");

  2832.         else if (flags & SWS_CPU_CAPS_3DNOW)

  2833.             av_log(c, AV_LOG_INFO, "using 3DNOW\n");

  2834.         else if (flags & SWS_CPU_CAPS_MMX)

  2835.             av_log(c, AV_LOG_INFO, "using MMX\n");

  2836.         else if (flags & SWS_CPU_CAPS_ALTIVEC)

  2837.             av_log(c, AV_LOG_INFO, "using AltiVec\n");

  2838.         else

  2839.             av_log(c, AV_LOG_INFO, "using C\n");

  2840.     }

  2841. 

  2842.     if (flags & SWS_PRINT_INFO) {

  2843.         if (flags & SWS_CPU_CAPS_MMX) {

  2844.             if (c->canMMX2BeUsed && (flags&SWS_FAST_BILINEAR))

  2845.                 av_log(c, AV_LOG_VERBOSE, "using FAST_BILINEAR MMX2 scaler for horizontal scaling\n");

  2846.             else {

  2847.                 if (c->hLumFilterSize==4)

  2848.                     av_log(c, AV_LOG_VERBOSE, "using 4-tap MMX scaler for horizontal luminance scaling\n");

  2849.                 else if (c->hLumFilterSize==8)

  2850.                     av_log(c, AV_LOG_VERBOSE, "using 8-tap MMX scaler for horizontal luminance scaling\n");

  2851.                 else

  2852.                     av_log(c, AV_LOG_VERBOSE, "using n-tap MMX scaler for horizontal luminance scaling\n");

  2853. 

  2854.                 if (c->hChrFilterSize==4)

  2855.                     av_log(c, AV_LOG_VERBOSE, "using 4-tap MMX scaler for horizontal chrominance scaling\n");

  2856.                 else if (c->hChrFilterSize==8)

  2857.                     av_log(c, AV_LOG_VERBOSE, "using 8-tap MMX scaler for horizontal chrominance scaling\n");

  2858.                 else

  2859.                     av_log(c, AV_LOG_VERBOSE, "using n-tap MMX scaler for horizontal chrominance scaling\n");

  2860.             }

  2861.         } else {

  2862. #if ARCH_X86

  2863.             av_log(c, AV_LOG_VERBOSE, "using x86 asm scaler for horizontal scaling\n");

  2864. #else

  2865.             if (flags & SWS_FAST_BILINEAR)

  2866.                 av_log(c, AV_LOG_VERBOSE, "using FAST_BILINEAR C scaler for horizontal scaling\n");

  2867.             else

  2868.                 av_log(c, AV_LOG_VERBOSE, "using C scaler for horizontal scaling\n");

  2869. #endif

  2870.         }

  2871.         if (isPlanarYUV(dstFormat)) {

  2872.             if (c->vLumFilterSize==1)

  2873.                 av_log(c, AV_LOG_VERBOSE, "using 1-tap %s \"scaler\" for vertical scaling (YV12 like)\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");

  2874.             else

  2875.                 av_log(c, AV_LOG_VERBOSE, "using n-tap %s scaler for vertical scaling (YV12 like)\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");

  2876.         } else {

  2877.             if (c->vLumFilterSize==1 && c->vChrFilterSize==2)

  2878.                 av_log(c, AV_LOG_VERBOSE, "using 1-tap %s \"scaler\" for vertical luminance scaling (BGR)\n"

  2879.                        "      2-tap scaler for vertical chrominance scaling (BGR)\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");

  2880.             else if (c->vLumFilterSize==2 && c->vChrFilterSize==2)

  2881.                 av_log(c, AV_LOG_VERBOSE, "using 2-tap linear %s scaler for vertical scaling (BGR)\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");

  2882.             else

  2883.                 av_log(c, AV_LOG_VERBOSE, "using n-tap %s scaler for vertical scaling (BGR)\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");

  2884.         }

  2885. 

  2886.         if (dstFormat==PIX_FMT_BGR24)

  2887.             av_log(c, AV_LOG_VERBOSE, "using %s YV12->BGR24 converter\n",

  2888.                    (flags & SWS_CPU_CAPS_MMX2) ? "MMX2" : ((flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C"));

  2889.         else if (dstFormat==PIX_FMT_RGB32)

  2890.             av_log(c, AV_LOG_VERBOSE, "using %s YV12->BGR32 converter\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");

  2891.         else if (dstFormat==PIX_FMT_BGR565)

  2892.             av_log(c, AV_LOG_VERBOSE, "using %s YV12->BGR16 converter\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");

  2893.         else if (dstFormat==PIX_FMT_BGR555)

  2894.             av_log(c, AV_LOG_VERBOSE, "using %s YV12->BGR15 converter\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");

  2895. 

  2896.         av_log(c, AV_LOG_VERBOSE, "%dx%d -> %dx%d\n", srcW, srcH, dstW, dstH);

  2897.     }

  2898.     if (flags & SWS_PRINT_INFO) {

  2899.         av_log(c, AV_LOG_DEBUG, "lum srcW=%d srcH=%d dstW=%d dstH=%d xInc=%d yInc=%d\n",

  2900.                c->srcW, c->srcH, c->dstW, c->dstH, c->lumXInc, c->lumYInc);

  2901.         av_log(c, AV_LOG_DEBUG, "chr srcW=%d srcH=%d dstW=%d dstH=%d xInc=%d yInc=%d\n",

  2902.                c->chrSrcW, c->chrSrcH, c->chrDstW, c->chrDstH, c->chrXInc, c->chrYInc);

  2903.     }

  2904. 

  2905.     c->swScale= getSwsFunc(c);

  2906.     return c;

  2907. 

  2908. fail:

  2909.     sws_freeContext(c);

  2910.     return NULL;

  2911. }

  2912. 

  2913. static void reset_ptr(const uint8_t* src[], int format)

  2914. {

  2915.     if(!isALPHA(format))

  2916.         src[3]=NULL;

  2917.     if(!isPlanarYUV(format)) {

  2918.         src[3]=src[2]=NULL;

  2919. 

  2920.         if (!usePal(format))

  2921.             src[1]= NULL;

  2922.     }

  2923. }

  2924. 

  2925. /**

  2926.  * swscale wrapper, so we don't need to export the SwsContext.

  2927.  * Assumes planar YUV to be in YUV order instead of YVU.

  2928.  */

  2929. int sws_scale(SwsContext *c, const uint8_t* src[], int srcStride[], int srcSliceY,

  2930.               int srcSliceH, uint8_t* dst[], int dstStride[])

  2931. {

  2932.     int i;

  2933.     const uint8_t* src2[4]= {src[0], src[1], src[2], src[3]};

  2934.     uint8_t* dst2[4]= {dst[0], dst[1], dst[2], dst[3]};

  2935. 

  2936.     // do not mess up sliceDir if we have a "trailing" 0-size slice

  2937.     if (srcSliceH == 0)

  2938.         return 0;

  2939. 

  2940.     if (c->sliceDir == 0 && srcSliceY != 0 && srcSliceY + srcSliceH != c->srcH) {

  2941.         av_log(c, AV_LOG_ERROR, "Slices start in the middle!\n");

  2942.         return 0;

  2943.     }

  2944.     if (c->sliceDir == 0) {

  2945.         if (srcSliceY == 0) c->sliceDir = 1; else c->sliceDir = -1;

  2946.     }

  2947. 

  2948.     if (usePal(c->srcFormat)) {

  2949.         for (i=0; i<256; i++) {

  2950.             int p, r, g, b,y,u,v;

  2951.             if(c->srcFormat == PIX_FMT_PAL8) {

  2952.                 p=((const uint32_t*)(src[1]))[i];

  2953.                 r= (p>>16)&0xFF;

  2954.                 g= (p>> 8)&0xFF;

  2955.                 b=  p     &0xFF;

  2956.             } else if(c->srcFormat == PIX_FMT_RGB8) {

  2957.                 r= (i>>5    )*36;

  2958.                 g= ((i>>2)&7)*36;

  2959.                 b= (i&3     )*85;

  2960.             } else if(c->srcFormat == PIX_FMT_BGR8) {

  2961.                 b= (i>>6    )*85;

  2962.                 g= ((i>>3)&7)*36;

  2963.                 r= (i&7     )*36;

  2964.             } else if(c->srcFormat == PIX_FMT_RGB4_BYTE) {

  2965.                 r= (i>>3    )*255;

  2966.                 g= ((i>>1)&3)*85;

  2967.                 b= (i&1     )*255;

  2968.             } else {

  2969.                 assert(c->srcFormat == PIX_FMT_BGR4_BYTE);

  2970.                 b= (i>>3    )*255;

  2971.                 g= ((i>>1)&3)*85;

  2972.                 r= (i&1     )*255;

  2973.             }

  2974.             y= av_clip_uint8((RY*r + GY*g + BY*b + ( 33<<(RGB2YUV_SHIFT-1)))>>RGB2YUV_SHIFT);

  2975.             u= av_clip_uint8((RU*r + GU*g + BU*b + (257<<(RGB2YUV_SHIFT-1)))>>RGB2YUV_SHIFT);

  2976.             v= av_clip_uint8((RV*r + GV*g + BV*b + (257<<(RGB2YUV_SHIFT-1)))>>RGB2YUV_SHIFT);

  2977.             c->pal_yuv[i]= y + (u<<8) + (v<<16);

  2978. 

  2979.             switch(c->dstFormat) {

  2980.             case PIX_FMT_BGR32:

  2981. #if !HAVE_BIGENDIAN

  2982.             case PIX_FMT_RGB24:

  2983. #endif

  2984.                 c->pal_rgb[i]=  r + (g<<8) + (b<<16);

  2985.                 break;

  2986.             case PIX_FMT_BGR32_1:

  2987. #if HAVE_BIGENDIAN

  2988.             case PIX_FMT_BGR24:

  2989. #endif

  2990.                 c->pal_rgb[i]= (r + (g<<8) + (b<<16)) << 8;

  2991.                 break;

  2992.             case PIX_FMT_RGB32_1:

  2993. #if HAVE_BIGENDIAN

  2994.             case PIX_FMT_RGB24:

  2995. #endif

  2996.                 c->pal_rgb[i]= (b + (g<<8) + (r<<16)) << 8;

  2997.                 break;

  2998.             case PIX_FMT_RGB32:

  2999. #if !HAVE_BIGENDIAN

  3000.             case PIX_FMT_BGR24:

  3001. #endif

  3002.             default:

  3003.                 c->pal_rgb[i]=  b + (g<<8) + (r<<16);

  3004.             }

  3005.         }

  3006.     }

  3007. 

  3008.     // copy strides, so they can safely be modified

  3009.     if (c->sliceDir == 1) {

  3010.         // slices go from top to bottom

  3011.         int srcStride2[4]= {srcStride[0], srcStride[1], srcStride[2], srcStride[3]};

  3012.         int dstStride2[4]= {dstStride[0], dstStride[1], dstStride[2], dstStride[3]};

  3013. 

  3014.         reset_ptr(src2, c->srcFormat);

  3015.         reset_ptr((const uint8_t**)dst2, c->dstFormat);

  3016. 

  3017.         /* reset slice direction at end of frame */

  3018.         if (srcSliceY + srcSliceH == c->srcH)

  3019.             c->sliceDir = 0;

  3020. 

  3021.         return c->swScale(c, src2, srcStride2, srcSliceY, srcSliceH, dst2, dstStride2);

  3022.     } else {

  3023.         // slices go from bottom to top => we flip the image internally

  3024.         int srcStride2[4]= {-srcStride[0], -srcStride[1], -srcStride[2], -srcStride[3]};

  3025.         int dstStride2[4]= {-dstStride[0], -dstStride[1], -dstStride[2], -dstStride[3]};

  3026. 

  3027.         src2[0] += (srcSliceH-1)*srcStride[0];

  3028.         if (!usePal(c->srcFormat))

  3029.             src2[1] += ((srcSliceH>>c->chrSrcVSubSample)-1)*srcStride[1];

  3030.         src2[2] += ((srcSliceH>>c->chrSrcVSubSample)-1)*srcStride[2];

  3031.         src2[3] += (srcSliceH-1)*srcStride[3];

  3032.         dst2[0] += ( c->dstH                      -1)*dstStride[0];

  3033.         dst2[1] += ((c->dstH>>c->chrDstVSubSample)-1)*dstStride[1];

  3034.         dst2[2] += ((c->dstH>>c->chrDstVSubSample)-1)*dstStride[2];

  3035.         dst2[3] += ( c->dstH                      -1)*dstStride[3];

  3036. 

  3037.         reset_ptr(src2, c->srcFormat);

  3038.         reset_ptr((const uint8_t**)dst2, c->dstFormat);

  3039. 

  3040.         /* reset slice direction at end of frame */

  3041.         if (!srcSliceY)

  3042.             c->sliceDir = 0;

  3043. 

  3044.         return c->swScale(c, src2, srcStride2, c->srcH-srcSliceY-srcSliceH, srcSliceH, dst2, dstStride2);

  3045.     }

  3046. }

  3047. 

  3048. #if LIBSWSCALE_VERSION_MAJOR < 1

  3049. int sws_scale_ordered(SwsContext *c, const uint8_t* src[], int srcStride[], int srcSliceY,

  3050.                       int srcSliceH, uint8_t* dst[], int dstStride[])

  3051. {

  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.     if (!filter)

  3063.         return NULL;

  3064. 

  3065.     if (lumaGBlur!=0.0) {

  3066.         filter->lumH= sws_getGaussianVec(lumaGBlur, 3.0);

  3067.         filter->lumV= sws_getGaussianVec(lumaGBlur, 3.0);

  3068.     } else {

  3069.         filter->lumH= sws_getIdentityVec();

  3070.         filter->lumV= sws_getIdentityVec();

  3071.     }

  3072. 

  3073.     if (chromaGBlur!=0.0) {

  3074.         filter->chrH= sws_getGaussianVec(chromaGBlur, 3.0);

  3075.         filter->chrV= sws_getGaussianVec(chromaGBlur, 3.0);

  3076.     } else {

  3077.         filter->chrH= sws_getIdentityVec();

  3078.         filter->chrV= sws_getIdentityVec();

  3079.     }

  3080. 

  3081.     if (chromaSharpen!=0.0) {

  3082.         SwsVector *id= sws_getIdentityVec();

  3083.         sws_scaleVec(filter->chrH, -chromaSharpen);

  3084.         sws_scaleVec(filter->chrV, -chromaSharpen);

  3085.         sws_addVec(filter->chrH, id);

  3086.         sws_addVec(filter->chrV, id);

  3087.         sws_freeVec(id);

  3088.     }

  3089. 

  3090.     if (lumaSharpen!=0.0) {

  3091.         SwsVector *id= sws_getIdentityVec();

  3092.         sws_scaleVec(filter->lumH, -lumaSharpen);

  3093.         sws_scaleVec(filter->lumV, -lumaSharpen);

  3094.         sws_addVec(filter->lumH, id);

  3095.         sws_addVec(filter->lumV, id);

  3096.         sws_freeVec(id);

  3097.     }

  3098. 

  3099.     if (chromaHShift != 0.0)

  3100.         sws_shiftVec(filter->chrH, (int)(chromaHShift+0.5));

  3101. 

  3102.     if (chromaVShift != 0.0)

  3103.         sws_shiftVec(filter->chrV, (int)(chromaVShift+0.5));

  3104. 

  3105.     sws_normalizeVec(filter->chrH, 1.0);

  3106.     sws_normalizeVec(filter->chrV, 1.0);

  3107.     sws_normalizeVec(filter->lumH, 1.0);

  3108.     sws_normalizeVec(filter->lumV, 1.0);

  3109. 

  3110.     if (verbose) sws_printVec2(filter->chrH, NULL, AV_LOG_DEBUG);

  3111.     if (verbose) sws_printVec2(filter->lumH, NULL, AV_LOG_DEBUG);

  3112. 

  3113.     return filter;

  3114. }

  3115. 

  3116. SwsVector *sws_allocVec(int length)

  3117. {

  3118.     SwsVector *vec = av_malloc(sizeof(SwsVector));

  3119.     if (!vec)

  3120.         return NULL;

  3121.     vec->length = length;

  3122.     vec->coeff  = av_malloc(sizeof(double) * length);

  3123.     if (!vec->coeff)

  3124.         av_freep(&vec);

  3125.     return vec;

  3126. }

  3127. 

  3128. SwsVector *sws_getGaussianVec(double variance, double quality)

  3129. {

  3130.     const int length= (int)(variance*quality + 0.5) | 1;

  3131.     int i;

  3132.     double middle= (length-1)*0.5;

  3133.     SwsVector *vec= sws_allocVec(length);

  3134. 

  3135.     if (!vec)

  3136.         return NULL;

  3137. 

  3138.     for (i=0; i<length; i++) {

  3139.         double dist= i-middle;

  3140.         vec->coeff[i]= exp(-dist*dist/(2*variance*variance)) / sqrt(2*variance*PI);

  3141.     }

  3142. 

  3143.     sws_normalizeVec(vec, 1.0);

  3144. 

  3145.     return vec;

  3146. }

  3147. 

  3148. SwsVector *sws_getConstVec(double c, int length)

  3149. {

  3150.     int i;

  3151.     SwsVector *vec= sws_allocVec(length);

  3152. 

  3153.     if (!vec)

  3154.         return NULL;

  3155. 

  3156.     for (i=0; i<length; i++)

  3157.         vec->coeff[i]= c;

  3158. 

  3159.     return vec;

  3160. }

  3161. 

  3162. SwsVector *sws_getIdentityVec(void)

  3163. {

  3164.     return sws_getConstVec(1.0, 1);

  3165. }

  3166. 

  3167. double sws_dcVec(SwsVector *a)

  3168. {

  3169.     int i;

  3170.     double sum=0;

  3171. 

  3172.     for (i=0; i<a->length; i++)

  3173.         sum+= a->coeff[i];

  3174. 

  3175.     return sum;

  3176. }

  3177. 

  3178. void sws_scaleVec(SwsVector *a, double scalar)

  3179. {

  3180.     int i;

  3181. 

  3182.     for (i=0; i<a->length; i++)

  3183.         a->coeff[i]*= scalar;

  3184. }

  3185. 

  3186. void sws_normalizeVec(SwsVector *a, double height)

  3187. {

  3188.     sws_scaleVec(a, height/sws_dcVec(a));

  3189. }

  3190. 

  3191. static SwsVector *sws_getConvVec(SwsVector *a, SwsVector *b)

  3192. {

  3193.     int length= a->length + b->length - 1;

  3194.     int i, j;

  3195.     SwsVector *vec= sws_getConstVec(0.0, length);

  3196. 

  3197.     if (!vec)

  3198.         return NULL;

  3199. 

  3200.     for (i=0; i<a->length; i++) {

  3201.         for (j=0; j<b->length; j++) {

  3202.             vec->coeff[i+j]+= a->coeff[i]*b->coeff[j];

  3203.         }

  3204.     }

  3205. 

  3206.     return vec;

  3207. }

  3208. 

  3209. static SwsVector *sws_sumVec(SwsVector *a, SwsVector *b)

  3210. {

  3211.     int length= FFMAX(a->length, b->length);

  3212.     int i;

  3213.     SwsVector *vec= sws_getConstVec(0.0, length);

  3214. 

  3215.     if (!vec)

  3216.         return NULL;

  3217. 

  3218.     for (i=0; i<a->length; i++) vec->coeff[i + (length-1)/2 - (a->length-1)/2]+= a->coeff[i];

  3219.     for (i=0; i<b->length; i++) vec->coeff[i + (length-1)/2 - (b->length-1)/2]+= b->coeff[i];

  3220. 

  3221.     return vec;

  3222. }

  3223. 

  3224. static SwsVector *sws_diffVec(SwsVector *a, SwsVector *b)

  3225. {

  3226.     int length= FFMAX(a->length, b->length);

  3227.     int i;

  3228.     SwsVector *vec= sws_getConstVec(0.0, length);

  3229. 

  3230.     if (!vec)

  3231.         return NULL;

  3232. 

  3233.     for (i=0; i<a->length; i++) vec->coeff[i + (length-1)/2 - (a->length-1)/2]+= a->coeff[i];

  3234.     for (i=0; i<b->length; i++) vec->coeff[i + (length-1)/2 - (b->length-1)/2]-= b->coeff[i];

  3235. 

  3236.     return vec;

  3237. }

  3238. 

  3239. /* shift left / or right if "shift" is negative */

  3240. static SwsVector *sws_getShiftedVec(SwsVector *a, int shift)

  3241. {

  3242.     int length= a->length + FFABS(shift)*2;

  3243.     int i;

  3244.     SwsVector *vec= sws_getConstVec(0.0, length);

  3245. 

  3246.     if (!vec)

  3247.         return NULL;

  3248. 

  3249.     for (i=0; i<a->length; i++) {

  3250.         vec->coeff[i + (length-1)/2 - (a->length-1)/2 - shift]= a->coeff[i];

  3251.     }

  3252. 

  3253.     return vec;

  3254. }

  3255. 

  3256. void sws_shiftVec(SwsVector *a, int shift)

  3257. {

  3258.     SwsVector *shifted= sws_getShiftedVec(a, shift);

  3259.     av_free(a->coeff);

  3260.     a->coeff= shifted->coeff;

  3261.     a->length= shifted->length;

  3262.     av_free(shifted);

  3263. }

  3264. 

  3265. void sws_addVec(SwsVector *a, SwsVector *b)

  3266. {

  3267.     SwsVector *sum= sws_sumVec(a, b);

  3268.     av_free(a->coeff);

  3269.     a->coeff= sum->coeff;

  3270.     a->length= sum->length;

  3271.     av_free(sum);

  3272. }

  3273. 

  3274. void sws_subVec(SwsVector *a, SwsVector *b)

  3275. {

  3276.     SwsVector *diff= sws_diffVec(a, b);

  3277.     av_free(a->coeff);

  3278.     a->coeff= diff->coeff;

  3279.     a->length= diff->length;

  3280.     av_free(diff);

  3281. }

  3282. 

  3283. void sws_convVec(SwsVector *a, SwsVector *b)

  3284. {

  3285.     SwsVector *conv= sws_getConvVec(a, b);

  3286.     av_free(a->coeff);

  3287.     a->coeff= conv->coeff;

  3288.     a->length= conv->length;

  3289.     av_free(conv);

  3290. }

  3291. 

  3292. SwsVector *sws_cloneVec(SwsVector *a)

  3293. {

  3294.     int i;

  3295.     SwsVector *vec= sws_allocVec(a->length);

  3296. 

  3297.     if (!vec)

  3298.         return NULL;

  3299. 

  3300.     for (i=0; i<a->length; i++) vec->coeff[i]= a->coeff[i];

  3301. 

  3302.     return vec;

  3303. }

  3304. 

  3305. void sws_printVec2(SwsVector *a, AVClass *log_ctx, int log_level)

  3306. {

  3307.     int i;

  3308.     double max=0;

  3309.     double min=0;

  3310.     double range;

  3311. 

  3312.     for (i=0; i<a->length; i++)

  3313.         if (a->coeff[i]>max) max= a->coeff[i];

  3314. 

  3315.     for (i=0; i<a->length; i++)

  3316.         if (a->coeff[i]<min) min= a->coeff[i];

  3317. 

  3318.     range= max - min;

  3319. 

  3320.     for (i=0; i<a->length; i++) {

  3321.         int x= (int)((a->coeff[i]-min)*60.0/range +0.5);

  3322.         av_log(log_ctx, log_level, "%1.3f ", a->coeff[i]);

  3323.         for (;x>0; x--) av_log(log_ctx, log_level, " ");

  3324.         av_log(log_ctx, log_level, "|\n");

  3325.     }

  3326. }

  3327. 

  3328. #if LIBSWSCALE_VERSION_MAJOR < 1

  3329. void sws_printVec(SwsVector *a)

  3330. {

  3331.     sws_printVec2(a, NULL, AV_LOG_DEBUG);

  3332. }

  3333. #endif

  3334. 

  3335. void sws_freeVec(SwsVector *a)

  3336. {

  3337.     if (!a) return;

  3338.     av_freep(&a->coeff);

  3339.     a->length=0;

  3340.     av_free(a);

  3341. }

  3342. 

  3343. void sws_freeFilter(SwsFilter *filter)

  3344. {

  3345.     if (!filter) return;

  3346. 

  3347.     if (filter->lumH) sws_freeVec(filter->lumH);

  3348.     if (filter->lumV) sws_freeVec(filter->lumV);

  3349.     if (filter->chrH) sws_freeVec(filter->chrH);

  3350.     if (filter->chrV) sws_freeVec(filter->chrV);

  3351.     av_free(filter);

  3352. }

  3353. 

  3354. void sws_freeContext(SwsContext *c)

  3355. {

  3356.     int i;

  3357.     if (!c) return;

  3358. 

  3359.     if (c->lumPixBuf) {

  3360.         for (i=0; i<c->vLumBufSize; i++)

  3361.             av_freep(&c->lumPixBuf[i]);

  3362.         av_freep(&c->lumPixBuf);

  3363.     }

  3364. 

  3365.     if (c->chrPixBuf) {

  3366.         for (i=0; i<c->vChrBufSize; i++)

  3367.             av_freep(&c->chrPixBuf[i]);

  3368.         av_freep(&c->chrPixBuf);

  3369.     }

  3370. 

  3371.     if (CONFIG_SWSCALE_ALPHA && c->alpPixBuf) {

  3372.         for (i=0; i<c->vLumBufSize; i++)

  3373.             av_freep(&c->alpPixBuf[i]);

  3374.         av_freep(&c->alpPixBuf);

  3375.     }

  3376. 

  3377.     av_freep(&c->vLumFilter);

  3378.     av_freep(&c->vChrFilter);

  3379.     av_freep(&c->hLumFilter);

  3380.     av_freep(&c->hChrFilter);

  3381. #ifdef COMPILE_ALTIVEC

  3382.     av_freep(&c->vYCoeffsBank);

  3383.     av_freep(&c->vCCoeffsBank);

  3384. #endif

  3385. 

  3386.     av_freep(&c->vLumFilterPos);

  3387.     av_freep(&c->vChrFilterPos);

  3388.     av_freep(&c->hLumFilterPos);

  3389.     av_freep(&c->hChrFilterPos);

  3390. 

  3391. #if ARCH_X86 && CONFIG_GPL

  3392. #ifdef MAP_ANONYMOUS

  3393.     if (c->lumMmx2FilterCode) munmap(c->lumMmx2FilterCode, c->lumMmx2FilterCodeSize);

  3394.     if (c->chrMmx2FilterCode) munmap(c->chrMmx2FilterCode, c->chrMmx2FilterCodeSize);

  3395. #elif HAVE_VIRTUALALLOC

  3396.     if (c->lumMmx2FilterCode) VirtualFree(c->lumMmx2FilterCode, c->lumMmx2FilterCodeSize, MEM_RELEASE);

  3397.     if (c->chrMmx2FilterCode) VirtualFree(c->chrMmx2FilterCode, c->chrMmx2FilterCodeSize, MEM_RELEASE);

  3398. #else

  3399.     av_free(c->lumMmx2FilterCode);

  3400.     av_free(c->chrMmx2FilterCode);

  3401. #endif

  3402.     c->lumMmx2FilterCode=NULL;

  3403.     c->chrMmx2FilterCode=NULL;

  3404. #endif /* ARCH_X86 && CONFIG_GPL */

  3405. 

  3406.     av_freep(&c->yuvTable);

  3407. 

  3408.     av_free(c);

  3409. }

  3410. 

  3411. struct SwsContext *sws_getCachedContext(struct SwsContext *context,

  3412.                                         int srcW, int srcH, enum PixelFormat srcFormat,

  3413.                                         int dstW, int dstH, enum PixelFormat dstFormat, int flags,

  3414.                                         SwsFilter *srcFilter, SwsFilter *dstFilter, const double *param)

  3415. {

  3416.     static const double default_param[2] = {SWS_PARAM_DEFAULT, SWS_PARAM_DEFAULT};

  3417. 

  3418.     if (!param)

  3419.         param = default_param;

  3420. 

  3421.     if (context) {

  3422.         if (context->srcW != srcW || context->srcH != srcH ||

  3423.             context->srcFormat != srcFormat ||

  3424.             context->dstW != dstW || context->dstH != dstH ||

  3425.             context->dstFormat != dstFormat || context->flags != flags ||

  3426.             context->param[0] != param[0] || context->param[1] != param[1])

  3427.         {

  3428.             sws_freeContext(context);

  3429.             context = NULL;

  3430.         }

  3431.     }

  3432.     if (!context) {

  3433.         return sws_getContext(srcW, srcH, srcFormat,

  3434.                               dstW, dstH, dstFormat, flags,

  3435.                               srcFilter, dstFilter, param);

  3436.     }

  3437.     return context;

  3438. }