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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. #define isSupportedOut(x)   (       \

  161.            (x)==PIX_FMT_YUV420P     \

  162.         || (x)==PIX_FMT_YUVA420P    \

  163.         || (x)==PIX_FMT_YUYV422     \

  164.         || (x)==PIX_FMT_UYVY422     \

  165.         || (x)==PIX_FMT_YUV444P     \

  166.         || (x)==PIX_FMT_YUV422P     \

  167.         || (x)==PIX_FMT_YUV411P     \

  168.         || isRGB(x)                 \

  169.         || isBGR(x)                 \

  170.         || (x)==PIX_FMT_NV12        \

  171.         || (x)==PIX_FMT_NV21        \

  172.         || (x)==PIX_FMT_GRAY16BE    \

  173.         || (x)==PIX_FMT_GRAY16LE    \

  174.         || (x)==PIX_FMT_GRAY8       \

  175.         || (x)==PIX_FMT_YUV410P     \

  176.         || (x)==PIX_FMT_YUV440P     \

  177.         || (x)==PIX_FMT_YUV420P16LE   \

  178.         || (x)==PIX_FMT_YUV422P16LE   \

  179.         || (x)==PIX_FMT_YUV444P16LE   \

  180.         || (x)==PIX_FMT_YUV420P16BE   \

  181.         || (x)==PIX_FMT_YUV422P16BE   \

  182.         || (x)==PIX_FMT_YUV444P16BE   \

  183.     )

  184. #define isPacked(x)         (       \

  185.            (x)==PIX_FMT_PAL8        \

  186.         || (x)==PIX_FMT_YUYV422     \

  187.         || (x)==PIX_FMT_UYVY422     \

  188.         || isRGB(x)                 \

  189.         || isBGR(x)                 \

  190.     )

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

  192. 

  193. #define RGB2YUV_SHIFT 15

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

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

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

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

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

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

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

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

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

  203. 

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

  205. 

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

  207.     {0.7152, 0.0722, 0.2126, -0.386, 0.5, -0.115, -0.454, -0.046, 0.5},

  208.     {0.7152, 0.0722, 0.2126, -0.386, 0.5, -0.115, -0.454, -0.046, 0.5},

  209.     {0.587 , 0.114 , 0.299 , -0.331, 0.5, -0.169, -0.419, -0.081, 0.5},

  210.     {0.587 , 0.114 , 0.299 , -0.331, 0.5, -0.169, -0.419, -0.081, 0.5},

  211.     {0.59  , 0.11  , 0.30  , -0.331, 0.5, -0.169, -0.421, -0.079, 0.5}, //FCC

  212.     {0.587 , 0.114 , 0.299 , -0.331, 0.5, -0.169, -0.419, -0.081, 0.5},

  213.     {0.587 , 0.114 , 0.299 , -0.331, 0.5, -0.169, -0.419, -0.081, 0.5}, //SMPTE 170M

  214.     {0.701 , 0.087 , 0.212 , -0.384, 0.5  -0.116, -0.445, -0.055, 0.5}, //SMPTE 240M

  215. };

  216. 

  217. /*

  218. NOTES

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

  220. 

  221. TODO

  222. more intelligent misalignment avoidance for the horizontal scaler

  223. write special vertical cubic upscale version

  224. optimize C code (YV12 / minmax)

  225. add support for packed pixel YUV input & output

  226. add support for Y8 output

  227. optimize BGR24 & BGR32

  228. add BGR4 output support

  229. write special BGR->BGR scaler

  230. */

  231. 

  232. #if ARCH_X86 && CONFIG_GPL

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

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

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

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

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

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

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

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

  241. 

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

  243.         0x0103010301030103LL,

  244.         0x0200020002000200LL,};

  245. 

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

  247.         0x0602060206020602LL,

  248.         0x0004000400040004LL,};

  249. 

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

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

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

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

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

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

  256. 

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

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

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

  260. 

  261. #ifdef FAST_BGR2YV12

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

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

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

  265. #else

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

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

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

  269. #endif /* FAST_BGR2YV12 */

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

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

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

  273. 

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

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

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

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

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

  279. 

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

  281.     {0x38380000DAC83838ULL, 0xECFFDAC80000ECFFULL, 0xF6E40000D0E3F6E4ULL, 0x3838D0E300003838ULL},

  282.     {0xECFF0000DAC8ECFFULL, 0x3838DAC800003838ULL, 0x38380000D0E33838ULL, 0xF6E4D0E30000F6E4ULL},

  283. };

  284. 

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

  286. 

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

  288. 

  289. // clipping helper table for C implementations:

  290. static unsigned char clip_table[768];

  291. 

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

  293. 

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

  295. {  1,   3,   1,   3,   1,   3,   1,   3, },

  296. {  2,   0,   2,   0,   2,   0,   2,   0, },

  297. };

  298. 

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

  300. {  6,   2,   6,   2,   6,   2,   6,   2, },

  301. {  0,   4,   0,   4,   0,   4,   0,   4, },

  302. };

  303. 

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

  305. { 17,   9,  23,  15,  16,   8,  22,  14, },

  306. {  5,  29,   3,  27,   4,  28,   2,  26, },

  307. { 21,  13,  19,  11,  20,  12,  18,  10, },

  308. {  0,  24,   6,  30,   1,  25,   7,  31, },

  309. { 16,   8,  22,  14,  17,   9,  23,  15, },

  310. {  4,  28,   2,  26,   5,  29,   3,  27, },

  311. { 20,  12,  18,  10,  21,  13,  19,  11, },

  312. {  1,  25,   7,  31,   0,  24,   6,  30, },

  313. };

  314. 

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

  316. {  0,  55,  14,  68,   3,  58,  17,  72, },

  317. { 37,  18,  50,  32,  40,  22,  54,  35, },

  318. {  9,  64,   5,  59,  13,  67,   8,  63, },

  319. { 46,  27,  41,  23,  49,  31,  44,  26, },

  320. {  2,  57,  16,  71,   1,  56,  15,  70, },

  321. { 39,  21,  52,  34,  38,  19,  51,  33, },

  322. { 11,  66,   7,  62,  10,  65,   6,  60, },

  323. { 48,  30,  43,  25,  47,  29,  42,  24, },

  324. };

  325. 

  326. #if 1

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

  328. {117,  62, 158, 103, 113,  58, 155, 100, },

  329. { 34, 199,  21, 186,  31, 196,  17, 182, },

  330. {144,  89, 131,  76, 141,  86, 127,  72, },

  331. {  0, 165,  41, 206,  10, 175,  52, 217, },

  332. {110,  55, 151,  96, 120,  65, 162, 107, },

  333. { 28, 193,  14, 179,  38, 203,  24, 189, },

  334. {138,  83, 124,  69, 148,  93, 134,  79, },

  335. {  7, 172,  48, 213,   3, 168,  45, 210, },

  336. };

  337. #elif 1

  338. // tries to correct a gamma of 1.5

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

  340. {  0, 143,  18, 200,   2, 156,  25, 215, },

  341. { 78,  28, 125,  64,  89,  36, 138,  74, },

  342. { 10, 180,   3, 161,  16, 195,   8, 175, },

  343. {109,  51,  93,  38, 121,  60, 105,  47, },

  344. {  1, 152,  23, 210,   0, 147,  20, 205, },

  345. { 85,  33, 134,  71,  81,  30, 130,  67, },

  346. { 14, 190,   6, 171,  12, 185,   5, 166, },

  347. {117,  57, 101,  44, 113,  54,  97,  41, },

  348. };

  349. #elif 1

  350. // tries to correct a gamma of 2.0

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

  352. {  0, 124,   8, 193,   0, 140,  12, 213, },

  353. { 55,  14, 104,  42,  66,  19, 119,  52, },

  354. {  3, 168,   1, 145,   6, 187,   3, 162, },

  355. { 86,  31,  70,  21,  99,  39,  82,  28, },

  356. {  0, 134,  11, 206,   0, 129,   9, 200, },

  357. { 62,  17, 114,  48,  58,  16, 109,  45, },

  358. {  5, 181,   2, 157,   4, 175,   1, 151, },

  359. { 95,  36,  78,  26,  90,  34,  74,  24, },

  360. };

  361. #else

  362. // tries to correct a gamma of 2.5

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

  364. {  0, 107,   3, 187,   0, 125,   6, 212, },

  365. { 39,   7,  86,  28,  49,  11, 102,  36, },

  366. {  1, 158,   0, 131,   3, 180,   1, 151, },

  367. { 68,  19,  52,  12,  81,  25,  64,  17, },

  368. {  0, 119,   5, 203,   0, 113,   4, 195, },

  369. { 45,   9,  96,  33,  42,   8,  91,  30, },

  370. {  2, 172,   1, 144,   2, 165,   0, 137, },

  371. { 77,  23,  60,  15,  72,  21,  56,  14, },

  372. };

  373. #endif

  374. 

  375. const char *sws_format_name(enum PixelFormat format)

  376. {

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

  378.         return av_pix_fmt_descriptors[format].name;

  379.     else

  380.         return "Unknown format";

  381. }

  382. 

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

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

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

  386.                                                     int dstW, int chrDstW, int big_endian)

  387. {

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

  389.     int i;

  390. 

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

  392.         int val = 1 << 10;

  393.         int j;

  394. 

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

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

  397. 

  398.         if (big_endian) {

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

  400.         } else {

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

  402.         }

  403.     }

  404. 

  405.     if (uDest) {

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

  407.             int u = 1 << 10;

  408.             int v = 1 << 10;

  409.             int j;

  410. 

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

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

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

  414.             }

  415. 

  416.             if (big_endian) {

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

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

  419.             } else {

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

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

  422.             }

  423.         }

  424.     }

  425. 

  426.     if (CONFIG_SWSCALE_ALPHA && aDest) {

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

  428.             int val = 1 << 10;

  429.             int j;

  430. 

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

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

  433. 

  434.             if (big_endian) {

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

  436.             } else {

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

  438.             }

  439.         }

  440.     }

  441. }

  442. 

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

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

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

  446.                                  enum PixelFormat dstFormat)

  447. {

  448.     if (isBE(dstFormat)) {

  449.         yuv2yuvX16inC_template(lumFilter, lumSrc, lumFilterSize,

  450.                                chrFilter, chrSrc, chrFilterSize,

  451.                                alpSrc,

  452.                                dest, uDest, vDest, aDest,

  453.                                dstW, chrDstW, 1);

  454.     } else {

  455.         yuv2yuvX16inC_template(lumFilter, lumSrc, lumFilterSize,

  456.                                chrFilter, chrSrc, chrFilterSize,

  457.                                alpSrc,

  458.                                dest, uDest, vDest, aDest,

  459.                                dstW, chrDstW, 0);

  460.     }

  461. }

  462. 

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

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

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

  466. {

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

  468.     int i;

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

  470.         int val=1<<18;

  471.         int j;

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

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

  474. 

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

  476.     }

  477. 

  478.     if (uDest)

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

  480.             int u=1<<18;

  481.             int v=1<<18;

  482.             int j;

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

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

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

  486.             }

  487. 

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

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

  490.         }

  491. 

  492.     if (CONFIG_SWSCALE_ALPHA && aDest)

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

  494.             int val=1<<18;

  495.             int j;

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

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

  498. 

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

  500.         }

  501. 

  502. }

  503. 

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

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

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

  507. {

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

  509.     int i;

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

  511.         int val=1<<18;

  512.         int j;

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

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

  515. 

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

  517.     }

  518. 

  519.     if (!uDest)

  520.         return;

  521. 

  522.     if (dstFormat == PIX_FMT_NV12)

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

  524.             int u=1<<18;

  525.             int v=1<<18;

  526.             int j;

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

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

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

  530.             }

  531. 

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

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

  534.         }

  535.     else

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

  537.             int u=1<<18;

  538.             int v=1<<18;

  539.             int j;

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

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

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

  543.             }

  544. 

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

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

  547.         }

  548. }

  549. 

  550. #define YSCALE_YUV_2_PACKEDX_NOCLIP_C(type,alpha) \

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

  552.         int j;\

  553.         int Y1 = 1<<18;\

  554.         int Y2 = 1<<18;\

  555.         int U  = 1<<18;\

  556.         int V  = 1<<18;\

  557.         int av_unused A1, A2;\

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

  559.         const int i2= 2*i;\

  560.         \

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

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

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

  564.         }\

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

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

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

  568.         }\

  569.         Y1>>=19;\

  570.         Y2>>=19;\

  571.         U >>=19;\

  572.         V >>=19;\

  573.         if (alpha) {\

  574.             A1 = 1<<18;\

  575.             A2 = 1<<18;\

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

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

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

  579.             }\

  580.             A1>>=19;\

  581.             A2>>=19;\

  582.         }\

  583. 

  584. #define YSCALE_YUV_2_PACKEDX_C(type,alpha) \

  585.         YSCALE_YUV_2_PACKEDX_NOCLIP_C(type,alpha)\

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

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

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

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

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

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

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

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

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

  595.         }\

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

  597.             A1=av_clip_uint8(A1);\

  598.             A2=av_clip_uint8(A2);\

  599.         }

  600. 

  601. #define YSCALE_YUV_2_PACKEDX_FULL_C(rnd,alpha) \

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

  603.         int j;\

  604.         int Y = 0;\

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

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

  607.         int av_unused A;\

  608.         int R,G,B;\

  609.         \

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

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

  612.         }\

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

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

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

  616.         }\

  617.         Y >>=10;\

  618.         U >>=10;\

  619.         V >>=10;\

  620.         if (alpha) {\

  621.             A = rnd;\

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

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

  624.             A >>=19;\

  625.             if (A&256)\

  626.                 A = av_clip_uint8(A);\

  627.         }\

  628. 

  629. #define YSCALE_YUV_2_RGBX_FULL_C(rnd,alpha) \

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

  631.         Y-= c->yuv2rgb_y_offset;\

  632.         Y*= c->yuv2rgb_y_coeff;\

  633.         Y+= rnd;\

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

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

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

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

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

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

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

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

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

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

  644.         }\

  645. 

  646. 

  647. #define YSCALE_YUV_2_GRAY16_C \

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

  649.         int j;\

  650.         int Y1 = 1<<18;\

  651.         int Y2 = 1<<18;\

  652.         int U  = 1<<18;\

  653.         int V  = 1<<18;\

  654.         \

  655.         const int i2= 2*i;\

  656.         \

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

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

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

  660.         }\

  661.         Y1>>=11;\

  662.         Y2>>=11;\

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

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

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

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

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

  668.         }

  669. 

  670. #define YSCALE_YUV_2_RGBX_C(type,alpha) \

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

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

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

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

  675. 

  676. #define YSCALE_YUV_2_PACKED2_C(type,alpha)   \

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

  678.         const int i2= 2*i;       \

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

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

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

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

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

  684.         int av_unused A1, A2;                                         \

  685.         if (alpha) {\

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

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

  688.         }\

  689. 

  690. #define YSCALE_YUV_2_GRAY16_2_C   \

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

  692.         const int i2= 2*i;       \

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

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

  695. 

  696. #define YSCALE_YUV_2_RGB2_C(type,alpha) \

  697.     YSCALE_YUV_2_PACKED2_C(type,alpha)\

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

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

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

  701. 

  702. #define YSCALE_YUV_2_PACKED1_C(type,alpha) \

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

  704.         const int i2= 2*i;\

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

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

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

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

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

  710.         int av_unused A1, A2;\

  711.         if (alpha) {\

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

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

  714.         }\

  715. 

  716. #define YSCALE_YUV_2_GRAY16_1_C \

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

  718.         const int i2= 2*i;\

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

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

  721. 

  722. #define YSCALE_YUV_2_RGB1_C(type,alpha) \

  723.     YSCALE_YUV_2_PACKED1_C(type,alpha)\

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

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

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

  727. 

  728. #define YSCALE_YUV_2_PACKED1B_C(type,alpha) \

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

  730.         const int i2= 2*i;\

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

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

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

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

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

  736.         int av_unused A1, A2;\

  737.         if (alpha) {\

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

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

  740.         }\

  741. 

  742. #define YSCALE_YUV_2_RGB1B_C(type,alpha) \

  743.     YSCALE_YUV_2_PACKED1B_C(type,alpha)\

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

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

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

  747. 

  748. #define YSCALE_YUV_2_MONO2_C \

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

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

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

  752.         int acc;\

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

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

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

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

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

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

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

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

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

  762.         dest++;\

  763.     }\

  764. 

  765. 

  766. #define YSCALE_YUV_2_MONOX_C \

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

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

  769.     int acc=0;\

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

  771.         int j;\

  772.         int Y1=1<<18;\

  773.         int Y2=1<<18;\

  774. \

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

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

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

  778.         }\

  779.         Y1>>=19;\

  780.         Y2>>=19;\

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

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

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

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

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

  786.         }\

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

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

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

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

  791.             dest++;\

  792.         }\

  793.     }

  794. 

  795. 

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

  797.     switch(c->dstFormat) {\

  798.     case PIX_FMT_RGB48BE:\

  799.     case PIX_FMT_RGB48LE:\

  800.         func(uint8_t,0)\

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

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

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

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

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

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

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

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

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

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

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

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

  813.             dest+=12;\

  814.         }\

  815.         break;\

  816.     case PIX_FMT_RGBA:\

  817.     case PIX_FMT_BGRA:\

  818.         if (CONFIG_SMALL) {\

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

  820.             func(uint32_t,needAlpha)\

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

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

  823.             }\

  824.         } else {\

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

  826.                 func(uint32_t,1)\

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

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

  829.                 }\

  830.             } else {\

  831.                 func(uint32_t,0)\

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

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

  834.                 }\

  835.             }\

  836.         }\

  837.         break;\

  838.     case PIX_FMT_ARGB:\

  839.     case PIX_FMT_ABGR:\

  840.         if (CONFIG_SMALL) {\

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

  842.             func(uint32_t,needAlpha)\

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

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

  845.             }\

  846.         } else {\

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

  848.                 func(uint32_t,1)\

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

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

  851.                 }\

  852.             } else {\

  853.                 func(uint32_t,0)\

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

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

  856.                 }\

  857.             }\

  858.         }                \

  859.         break;\

  860.     case PIX_FMT_RGB24:\

  861.         func(uint8_t,0)\

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

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

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

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

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

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

  868.             dest+=6;\

  869.         }\

  870.         break;\

  871.     case PIX_FMT_BGR24:\

  872.         func(uint8_t,0)\

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

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

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

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

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

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

  879.             dest+=6;\

  880.         }\

  881.         break;\

  882.     case PIX_FMT_RGB565:\

  883.     case PIX_FMT_BGR565:\

  884.         {\

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

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

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

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

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

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

  891.             func(uint16_t,0)\

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

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

  894.             }\

  895.         }\

  896.         break;\

  897.     case PIX_FMT_RGB555:\

  898.     case PIX_FMT_BGR555:\

  899.         {\

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

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

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

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

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

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

  906.             func(uint16_t,0)\

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

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

  909.             }\

  910.         }\

  911.         break;\

  912.     case PIX_FMT_RGB8:\

  913.     case PIX_FMT_BGR8:\

  914.         {\

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

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

  917.             func(uint8_t,0)\

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

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

  920.             }\

  921.         }\

  922.         break;\

  923.     case PIX_FMT_RGB4:\

  924.     case PIX_FMT_BGR4:\

  925.         {\

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

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

  928.             func(uint8_t,0)\

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

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

  931.             }\

  932.         }\

  933.         break;\

  934.     case PIX_FMT_RGB4_BYTE:\

  935.     case PIX_FMT_BGR4_BYTE:\

  936.         {\

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

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

  939.             func(uint8_t,0)\

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

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

  942.             }\

  943.         }\

  944.         break;\

  945.     case PIX_FMT_MONOBLACK:\

  946.     case PIX_FMT_MONOWHITE:\

  947.         {\

  948.             func_monoblack\

  949.         }\

  950.         break;\

  951.     case PIX_FMT_YUYV422:\

  952.         func2\

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

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

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

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

  957.         }                \

  958.         break;\

  959.     case PIX_FMT_UYVY422:\

  960.         func2\

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

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

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

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

  965.         }                \

  966.         break;\

  967.     case PIX_FMT_GRAY16BE:\

  968.         func_g16\

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

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

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

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

  973.         }                \

  974.         break;\

  975.     case PIX_FMT_GRAY16LE:\

  976.         func_g16\

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

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

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

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

  981.         }                \

  982.         break;\

  983.     }\

  984. 

  985. 

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

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

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

  989. {

  990.     int i;

  991.     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)

  992. }

  993. 

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

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

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

  997. {

  998.     int i;

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

  1000.     int aidx= 3;

  1001. 

  1002.     switch(c->dstFormat) {

  1003.     case PIX_FMT_ARGB:

  1004.         dest++;

  1005.         aidx= 0;

  1006.     case PIX_FMT_RGB24:

  1007.         aidx--;

  1008.     case PIX_FMT_RGBA:

  1009.         if (CONFIG_SMALL) {

  1010.             int needAlpha = CONFIG_SWSCALE_ALPHA && c->alpPixBuf;

  1011.             YSCALE_YUV_2_RGBX_FULL_C(1<<21, needAlpha)

  1012.                 dest[aidx]= needAlpha ? A : 255;

  1013.                 dest[0]= R>>22;

  1014.                 dest[1]= G>>22;

  1015.                 dest[2]= B>>22;

  1016.                 dest+= step;

  1017.             }

  1018.         } else {

  1019.             if (CONFIG_SWSCALE_ALPHA && c->alpPixBuf) {

  1020.                 YSCALE_YUV_2_RGBX_FULL_C(1<<21, 1)

  1021.                     dest[aidx]= A;

  1022.                     dest[0]= R>>22;

  1023.                     dest[1]= G>>22;

  1024.                     dest[2]= B>>22;

  1025.                     dest+= step;

  1026.                 }

  1027.             } else {

  1028.                 YSCALE_YUV_2_RGBX_FULL_C(1<<21, 0)

  1029.                     dest[aidx]= 255;

  1030.                     dest[0]= R>>22;

  1031.                     dest[1]= G>>22;

  1032.                     dest[2]= B>>22;

  1033.                     dest+= step;

  1034.                 }

  1035.             }

  1036.         }

  1037.         break;

  1038.     case PIX_FMT_ABGR:

  1039.         dest++;

  1040.         aidx= 0;

  1041.     case PIX_FMT_BGR24:

  1042.         aidx--;

  1043.     case PIX_FMT_BGRA:

  1044.         if (CONFIG_SMALL) {

  1045.             int needAlpha = CONFIG_SWSCALE_ALPHA && c->alpPixBuf;

  1046.             YSCALE_YUV_2_RGBX_FULL_C(1<<21, needAlpha)

  1047.                 dest[aidx]= needAlpha ? A : 255;

  1048.                 dest[0]= B>>22;

  1049.                 dest[1]= G>>22;

  1050.                 dest[2]= R>>22;

  1051.                 dest+= step;

  1052.             }

  1053.         } else {

  1054.             if (CONFIG_SWSCALE_ALPHA && c->alpPixBuf) {

  1055.                 YSCALE_YUV_2_RGBX_FULL_C(1<<21, 1)

  1056.                     dest[aidx]= A;

  1057.                     dest[0]= B>>22;

  1058.                     dest[1]= G>>22;

  1059.                     dest[2]= R>>22;

  1060.                     dest+= step;

  1061.                 }

  1062.             } else {

  1063.                 YSCALE_YUV_2_RGBX_FULL_C(1<<21, 0)

  1064.                     dest[aidx]= 255;

  1065.                     dest[0]= B>>22;

  1066.                     dest[1]= G>>22;

  1067.                     dest[2]= R>>22;

  1068.                     dest+= step;

  1069.                 }

  1070.             }

  1071.         }

  1072.         break;

  1073.     default:

  1074.         assert(0);

  1075.     }

  1076. }

  1077. 

  1078. static void fillPlane(uint8_t* plane, int stride, int width, int height, int y, uint8_t val)

  1079. {

  1080.     int i;

  1081.     uint8_t *ptr = plane + stride*y;

  1082.     for (i=0; i<height; i++) {

  1083.         memset(ptr, val, width);

  1084.         ptr += stride;

  1085.     }

  1086. }

  1087. 

  1088. static inline void rgb48ToY(uint8_t *dst, const uint8_t *src, int width)

  1089. {

  1090.     int i;

  1091.     for (i = 0; i < width; i++) {

  1092.         int r = src[i*6+0];

  1093.         int g = src[i*6+2];

  1094.         int b = src[i*6+4];

  1095. 

  1096.         dst[i] = (RY*r + GY*g + BY*b + (33<<(RGB2YUV_SHIFT-1))) >> RGB2YUV_SHIFT;

  1097.     }

  1098. }

  1099. 

  1100. static inline void rgb48ToUV(uint8_t *dstU, uint8_t *dstV,

  1101.                              uint8_t *src1, uint8_t *src2, int width)

  1102. {

  1103.     int i;

  1104.     assert(src1==src2);

  1105.     for (i = 0; i < width; i++) {

  1106.         int r = src1[6*i + 0];

  1107.         int g = src1[6*i + 2];

  1108.         int b = src1[6*i + 4];

  1109. 

  1110.         dstU[i] = (RU*r + GU*g + BU*b + (257<<(RGB2YUV_SHIFT-1))) >> RGB2YUV_SHIFT;

  1111.         dstV[i] = (RV*r + GV*g + BV*b + (257<<(RGB2YUV_SHIFT-1))) >> RGB2YUV_SHIFT;

  1112.     }

  1113. }

  1114. 

  1115. static inline void rgb48ToUV_half(uint8_t *dstU, uint8_t *dstV,

  1116.                                   uint8_t *src1, uint8_t *src2, int width)

  1117. {

  1118.     int i;

  1119.     assert(src1==src2);

  1120.     for (i = 0; i < width; i++) {

  1121.         int r= src1[12*i + 0] + src1[12*i + 6];

  1122.         int g= src1[12*i + 2] + src1[12*i + 8];

  1123.         int b= src1[12*i + 4] + src1[12*i + 10];

  1124. 

  1125.         dstU[i]= (RU*r + GU*g + BU*b + (257<<RGB2YUV_SHIFT)) >> (RGB2YUV_SHIFT+1);

  1126.         dstV[i]= (RV*r + GV*g + BV*b + (257<<RGB2YUV_SHIFT)) >> (RGB2YUV_SHIFT+1);

  1127.     }

  1128. }

  1129. 

  1130. #define BGR2Y(type, name, shr, shg, shb, maskr, maskg, maskb, RY, GY, BY, S)\

  1131. static inline void name(uint8_t *dst, const uint8_t *src, long width, uint32_t *unused)\

  1132. {\

  1133.     int i;\

  1134.     for (i=0; i<width; i++) {\

  1135.         int b= (((const type*)src)[i]>>shb)&maskb;\

  1136.         int g= (((const type*)src)[i]>>shg)&maskg;\

  1137.         int r= (((const type*)src)[i]>>shr)&maskr;\

  1138. \

  1139.         dst[i]= (((RY)*r + (GY)*g + (BY)*b + (33<<((S)-1)))>>(S));\

  1140.     }\

  1141. }

  1142. 

  1143. BGR2Y(uint32_t, bgr32ToY,16, 0, 0, 0x00FF, 0xFF00, 0x00FF, RY<< 8, GY   , BY<< 8, RGB2YUV_SHIFT+8)

  1144. BGR2Y(uint32_t, rgb32ToY, 0, 0,16, 0x00FF, 0xFF00, 0x00FF, RY<< 8, GY   , BY<< 8, RGB2YUV_SHIFT+8)

  1145. BGR2Y(uint16_t, bgr16ToY, 0, 0, 0, 0x001F, 0x07E0, 0xF800, RY<<11, GY<<5, BY    , RGB2YUV_SHIFT+8)

  1146. BGR2Y(uint16_t, bgr15ToY, 0, 0, 0, 0x001F, 0x03E0, 0x7C00, RY<<10, GY<<5, BY    , RGB2YUV_SHIFT+7)

  1147. BGR2Y(uint16_t, rgb16ToY, 0, 0, 0, 0xF800, 0x07E0, 0x001F, RY    , GY<<5, BY<<11, RGB2YUV_SHIFT+8)

  1148. BGR2Y(uint16_t, rgb15ToY, 0, 0, 0, 0x7C00, 0x03E0, 0x001F, RY    , GY<<5, BY<<10, RGB2YUV_SHIFT+7)

  1149. 

  1150. static inline void abgrToA(uint8_t *dst, const uint8_t *src, long width, uint32_t *unused)

  1151. {

  1152.     int i;

  1153.     for (i=0; i<width; i++) {

  1154.         dst[i]= src[4*i];

  1155.     }

  1156. }

  1157. 

  1158. #define BGR2UV(type, name, shr, shg, shb, maska, maskr, maskg, maskb, RU, GU, BU, RV, GV, BV, S)\

  1159. static inline void name(uint8_t *dstU, uint8_t *dstV, const uint8_t *src, const uint8_t *dummy, long width, uint32_t *unused)\

  1160. {\

  1161.     int i;\

  1162.     for (i=0; i<width; i++) {\

  1163.         int b= (((const type*)src)[i]&maskb)>>shb;\

  1164.         int g= (((const type*)src)[i]&maskg)>>shg;\

  1165.         int r= (((const type*)src)[i]&maskr)>>shr;\

  1166. \

  1167.         dstU[i]= ((RU)*r + (GU)*g + (BU)*b + (257<<((S)-1)))>>(S);\

  1168.         dstV[i]= ((RV)*r + (GV)*g + (BV)*b + (257<<((S)-1)))>>(S);\

  1169.     }\

  1170. }\

  1171. static inline void name ## _half(uint8_t *dstU, uint8_t *dstV, const uint8_t *src, const uint8_t *dummy, long width, uint32_t *unused)\

  1172. {\

  1173.     int i;\

  1174.     for (i=0; i<width; i++) {\

  1175.         int pix0= ((const type*)src)[2*i+0];\

  1176.         int pix1= ((const type*)src)[2*i+1];\

  1177.         int g= (pix0&~(maskr|maskb))+(pix1&~(maskr|maskb));\

  1178.         int b= ((pix0+pix1-g)&(maskb|(2*maskb)))>>shb;\

  1179.         int r= ((pix0+pix1-g)&(maskr|(2*maskr)))>>shr;\

  1180.         g&= maskg|(2*maskg);\

  1181. \

  1182.         g>>=shg;\

  1183. \

  1184.         dstU[i]= ((RU)*r + (GU)*g + (BU)*b + (257<<(S)))>>((S)+1);\

  1185.         dstV[i]= ((RV)*r + (GV)*g + (BV)*b + (257<<(S)))>>((S)+1);\

  1186.     }\

  1187. }

  1188. 

  1189. BGR2UV(uint32_t, bgr32ToUV,16, 0, 0, 0xFF000000, 0xFF0000, 0xFF00,   0x00FF, RU<< 8, GU   , BU<< 8, RV<< 8, GV   , BV<< 8, RGB2YUV_SHIFT+8)

  1190. BGR2UV(uint32_t, rgb32ToUV, 0, 0,16, 0xFF000000,   0x00FF, 0xFF00, 0xFF0000, RU<< 8, GU   , BU<< 8, RV<< 8, GV   , BV<< 8, RGB2YUV_SHIFT+8)

  1191. BGR2UV(uint16_t, bgr16ToUV, 0, 0, 0,          0,   0x001F, 0x07E0,   0xF800, RU<<11, GU<<5, BU    , RV<<11, GV<<5, BV    , RGB2YUV_SHIFT+8)

  1192. BGR2UV(uint16_t, bgr15ToUV, 0, 0, 0,          0,   0x001F, 0x03E0,   0x7C00, RU<<10, GU<<5, BU    , RV<<10, GV<<5, BV    , RGB2YUV_SHIFT+7)

  1193. BGR2UV(uint16_t, rgb16ToUV, 0, 0, 0,          0,   0xF800, 0x07E0,   0x001F, RU    , GU<<5, BU<<11, RV    , GV<<5, BV<<11, RGB2YUV_SHIFT+8)

  1194. BGR2UV(uint16_t, rgb15ToUV, 0, 0, 0,          0,   0x7C00, 0x03E0,   0x001F, RU    , GU<<5, BU<<10, RV    , GV<<5, BV<<10, RGB2YUV_SHIFT+7)

  1195. 

  1196. static inline void palToY(uint8_t *dst, const uint8_t *src, long width, uint32_t *pal)

  1197. {

  1198.     int i;

  1199.     for (i=0; i<width; i++) {

  1200.         int d= src[i];

  1201. 

  1202.         dst[i]= pal[d] & 0xFF;

  1203.     }

  1204. }

  1205. 

  1206. static inline void palToUV(uint8_t *dstU, uint8_t *dstV,

  1207.                            const uint8_t *src1, const uint8_t *src2,

  1208.                            long width, uint32_t *pal)

  1209. {

  1210.     int i;

  1211.     assert(src1 == src2);

  1212.     for (i=0; i<width; i++) {

  1213.         int p= pal[src1[i]];

  1214. 

  1215.         dstU[i]= p>>8;

  1216.         dstV[i]= p>>16;

  1217.     }

  1218. }

  1219. 

  1220. static inline void monowhite2Y(uint8_t *dst, const uint8_t *src, long width, uint32_t *unused)

  1221. {

  1222.     int i, j;

  1223.     for (i=0; i<width/8; i++) {

  1224.         int d= ~src[i];

  1225.         for(j=0; j<8; j++)

  1226.             dst[8*i+j]= ((d>>(7-j))&1)*255;

  1227.     }

  1228. }

  1229. 

  1230. static inline void monoblack2Y(uint8_t *dst, const uint8_t *src, long width, uint32_t *unused)

  1231. {

  1232.     int i, j;

  1233.     for (i=0; i<width/8; i++) {

  1234.         int d= src[i];

  1235.         for(j=0; j<8; j++)

  1236.             dst[8*i+j]= ((d>>(7-j))&1)*255;

  1237.     }

  1238. }

  1239. 

  1240. 

  1241. //Note: we have C, MMX, MMX2, 3DNOW versions, there is no 3DNOW+MMX2 one

  1242. //Plain C versions

  1243. #if ((!HAVE_MMX || !CONFIG_GPL) && !HAVE_ALTIVEC) || CONFIG_RUNTIME_CPUDETECT

  1244. #define COMPILE_C

  1245. #endif

  1246. 

  1247. #if ARCH_PPC

  1248. #if HAVE_ALTIVEC || CONFIG_RUNTIME_CPUDETECT

  1249. #define COMPILE_ALTIVEC

  1250. #endif

  1251. #endif //ARCH_PPC

  1252. 

  1253. #if ARCH_X86

  1254. 

  1255. #if ((HAVE_MMX && !HAVE_AMD3DNOW && !HAVE_MMX2) || CONFIG_RUNTIME_CPUDETECT) && CONFIG_GPL

  1256. #define COMPILE_MMX

  1257. #endif

  1258. 

  1259. #if (HAVE_MMX2 || CONFIG_RUNTIME_CPUDETECT) && CONFIG_GPL

  1260. #define COMPILE_MMX2

  1261. #endif

  1262. 

  1263. #if ((HAVE_AMD3DNOW && !HAVE_MMX2) || CONFIG_RUNTIME_CPUDETECT) && CONFIG_GPL

  1264. #define COMPILE_3DNOW

  1265. #endif

  1266. #endif //ARCH_X86

  1267. 

  1268. #define COMPILE_TEMPLATE_MMX 0

  1269. #define COMPILE_TEMPLATE_MMX2 0

  1270. #define COMPILE_TEMPLATE_AMD3DNOW 0

  1271. #define COMPILE_TEMPLATE_ALTIVEC 0

  1272. 

  1273. #ifdef COMPILE_C

  1274. #define RENAME(a) a ## _C

  1275. #include "swscale_template.c"

  1276. #endif

  1277. 

  1278. #ifdef COMPILE_ALTIVEC

  1279. #undef RENAME

  1280. #undef COMPILE_TEMPLATE_ALTIVEC

  1281. #define COMPILE_TEMPLATE_ALTIVEC 1

  1282. #define RENAME(a) a ## _altivec

  1283. #include "swscale_template.c"

  1284. #endif

  1285. 

  1286. #if ARCH_X86

  1287. 

  1288. //MMX versions

  1289. #ifdef COMPILE_MMX

  1290. #undef RENAME

  1291. #undef COMPILE_TEMPLATE_MMX

  1292. #undef COMPILE_TEMPLATE_MMX2

  1293. #undef COMPILE_TEMPLATE_AMD3DNOW

  1294. #define COMPILE_TEMPLATE_MMX 1

  1295. #define COMPILE_TEMPLATE_MMX2 0

  1296. #define COMPILE_TEMPLATE_AMD3DNOW 0

  1297. #define RENAME(a) a ## _MMX

  1298. #include "swscale_template.c"

  1299. #endif

  1300. 

  1301. //MMX2 versions

  1302. #ifdef COMPILE_MMX2

  1303. #undef RENAME

  1304. #undef COMPILE_TEMPLATE_MMX

  1305. #undef COMPILE_TEMPLATE_MMX2

  1306. #undef COMPILE_TEMPLATE_AMD3DNOW

  1307. #define COMPILE_TEMPLATE_MMX 1

  1308. #define COMPILE_TEMPLATE_MMX2 1

  1309. #define COMPILE_TEMPLATE_AMD3DNOW 0

  1310. #define RENAME(a) a ## _MMX2

  1311. #include "swscale_template.c"

  1312. #endif

  1313. 

  1314. //3DNOW versions

  1315. #ifdef COMPILE_3DNOW

  1316. #undef RENAME

  1317. #undef COMPILE_TEMPLATE_MMX

  1318. #undef COMPILE_TEMPLATE_MMX2

  1319. #undef COMPILE_TEMPLATE_AMD3DNOW

  1320. #define COMPILE_TEMPLATE_MMX 1

  1321. #define COMPILE_TEMPLATE_MMX2 0

  1322. #define COMPILE_TEMPLATE_AMD3DNOW 1

  1323. #define RENAME(a) a ## _3DNow

  1324. #include "swscale_template.c"

  1325. #endif

  1326. 

  1327. #endif //ARCH_X86

  1328. 

  1329. static double getSplineCoeff(double a, double b, double c, double d, double dist)

  1330. {

  1331. //    printf("%f %f %f %f %f\n", a,b,c,d,dist);

  1332.     if (dist<=1.0) return ((d*dist + c)*dist + b)*dist +a;

  1333.     else           return getSplineCoeff(        0.0,

  1334.                                           b+ 2.0*c + 3.0*d,

  1335.                                                  c + 3.0*d,

  1336.                                          -b- 3.0*c - 6.0*d,

  1337.                                          dist-1.0);

  1338. }

  1339. 

  1340. static inline int initFilter(int16_t **outFilter, int16_t **filterPos, int *outFilterSize, int xInc,

  1341.                              int srcW, int dstW, int filterAlign, int one, int flags,

  1342.                              SwsVector *srcFilter, SwsVector *dstFilter, double param[2])

  1343. {

  1344.     int i;

  1345.     int filterSize;

  1346.     int filter2Size;

  1347.     int minFilterSize;

  1348.     int64_t *filter=NULL;

  1349.     int64_t *filter2=NULL;

  1350.     const int64_t fone= 1LL<<54;

  1351.     int ret= -1;

  1352. #if ARCH_X86

  1353.     if (flags & SWS_CPU_CAPS_MMX)

  1354.         __asm__ volatile("emms\n\t"::: "memory"); //FIXME this should not be required but it IS (even for non-MMX versions)

  1355. #endif

  1356. 

  1357.     // NOTE: the +1 is for the MMX scaler which reads over the end

  1358.     FF_ALLOC_OR_GOTO(NULL, *filterPos, (dstW+1)*sizeof(int16_t), fail);

  1359. 

  1360.     if (FFABS(xInc - 0x10000) <10) { // unscaled

  1361.         int i;

  1362.         filterSize= 1;

  1363.         FF_ALLOCZ_OR_GOTO(NULL, filter, dstW*sizeof(*filter)*filterSize, fail);

  1364. 

  1365.         for (i=0; i<dstW; i++) {

  1366.             filter[i*filterSize]= fone;

  1367.             (*filterPos)[i]=i;

  1368.         }

  1369. 

  1370.     } else if (flags&SWS_POINT) { // lame looking point sampling mode

  1371.         int i;

  1372.         int xDstInSrc;

  1373.         filterSize= 1;

  1374.         FF_ALLOC_OR_GOTO(NULL, filter, dstW*sizeof(*filter)*filterSize, fail);

  1375. 

  1376.         xDstInSrc= xInc/2 - 0x8000;

  1377.         for (i=0; i<dstW; i++) {

  1378.             int xx= (xDstInSrc - ((filterSize-1)<<15) + (1<<15))>>16;

  1379. 

  1380.             (*filterPos)[i]= xx;

  1381.             filter[i]= fone;

  1382.             xDstInSrc+= xInc;

  1383.         }

  1384.     } else if ((xInc <= (1<<16) && (flags&SWS_AREA)) || (flags&SWS_FAST_BILINEAR)) { // bilinear upscale

  1385.         int i;

  1386.         int xDstInSrc;

  1387.         filterSize= 2;

  1388.         FF_ALLOC_OR_GOTO(NULL, filter, dstW*sizeof(*filter)*filterSize, fail);

  1389. 

  1390.         xDstInSrc= xInc/2 - 0x8000;

  1391.         for (i=0; i<dstW; i++) {

  1392.             int xx= (xDstInSrc - ((filterSize-1)<<15) + (1<<15))>>16;

  1393.             int j;

  1394. 

  1395.             (*filterPos)[i]= xx;

  1396.             //bilinear upscale / linear interpolate / area averaging

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

  1398.                 int64_t coeff= fone - FFABS((xx<<16) - xDstInSrc)*(fone>>16);

  1399.                 if (coeff<0) coeff=0;

  1400.                 filter[i*filterSize + j]= coeff;

  1401.                 xx++;

  1402.             }

  1403.             xDstInSrc+= xInc;

  1404.         }

  1405.     } else {

  1406.         int xDstInSrc;

  1407.         int sizeFactor;

  1408. 

  1409.         if      (flags&SWS_BICUBIC)      sizeFactor=  4;

  1410.         else if (flags&SWS_X)            sizeFactor=  8;

  1411.         else if (flags&SWS_AREA)         sizeFactor=  1; //downscale only, for upscale it is bilinear

  1412.         else if (flags&SWS_GAUSS)        sizeFactor=  8;   // infinite ;)

  1413.         else if (flags&SWS_LANCZOS)      sizeFactor= param[0] != SWS_PARAM_DEFAULT ? ceil(2*param[0]) : 6;

  1414.         else if (flags&SWS_SINC)         sizeFactor= 20; // infinite ;)

  1415.         else if (flags&SWS_SPLINE)       sizeFactor= 20;  // infinite ;)

  1416.         else if (flags&SWS_BILINEAR)     sizeFactor=  2;

  1417.         else {

  1418.             sizeFactor= 0; //GCC warning killer

  1419.             assert(0);

  1420.         }

  1421. 

  1422.         if (xInc <= 1<<16)      filterSize= 1 + sizeFactor; // upscale

  1423.         else                    filterSize= 1 + (sizeFactor*srcW + dstW - 1)/ dstW;

  1424. 

  1425.         if (filterSize > srcW-2) filterSize=srcW-2;

  1426. 

  1427.         FF_ALLOC_OR_GOTO(NULL, filter, dstW*sizeof(*filter)*filterSize, fail);

  1428. 

  1429.         xDstInSrc= xInc - 0x10000;

  1430.         for (i=0; i<dstW; i++) {

  1431.             int xx= (xDstInSrc - ((filterSize-2)<<16)) / (1<<17);

  1432.             int j;

  1433.             (*filterPos)[i]= xx;

  1434.             for (j=0; j<filterSize; j++) {

  1435.                 int64_t d= ((int64_t)FFABS((xx<<17) - xDstInSrc))<<13;

  1436.                 double floatd;

  1437.                 int64_t coeff;

  1438. 

  1439.                 if (xInc > 1<<16)

  1440.                     d= d*dstW/srcW;

  1441.                 floatd= d * (1.0/(1<<30));

  1442. 

  1443.                 if (flags & SWS_BICUBIC) {

  1444.                     int64_t B= (param[0] != SWS_PARAM_DEFAULT ? param[0] :   0) * (1<<24);

  1445.                     int64_t C= (param[1] != SWS_PARAM_DEFAULT ? param[1] : 0.6) * (1<<24);

  1446.                     int64_t dd = ( d*d)>>30;

  1447.                     int64_t ddd= (dd*d)>>30;

  1448. 

  1449.                     if      (d < 1LL<<30)

  1450.                         coeff = (12*(1<<24)-9*B-6*C)*ddd + (-18*(1<<24)+12*B+6*C)*dd + (6*(1<<24)-2*B)*(1<<30);

  1451.                     else if (d < 1LL<<31)

  1452.                         coeff = (-B-6*C)*ddd + (6*B+30*C)*dd + (-12*B-48*C)*d + (8*B+24*C)*(1<<30);

  1453.                     else

  1454.                         coeff=0.0;

  1455.                     coeff *= fone>>(30+24);

  1456.                 }

  1457. /*                else if (flags & SWS_X) {

  1458.                     double p= param ? param*0.01 : 0.3;

  1459.                     coeff = d ? sin(d*PI)/(d*PI) : 1.0;

  1460.                     coeff*= pow(2.0, - p*d*d);

  1461.                 }*/

  1462.                 else if (flags & SWS_X) {

  1463.                     double A= param[0] != SWS_PARAM_DEFAULT ? param[0] : 1.0;

  1464.                     double c;

  1465. 

  1466.                     if (floatd<1.0)

  1467.                         c = cos(floatd*PI);

  1468.                     else

  1469.                         c=-1.0;

  1470.                     if (c<0.0)      c= -pow(-c, A);

  1471.                     else            c=  pow( c, A);

  1472.                     coeff= (c*0.5 + 0.5)*fone;

  1473.                 } else if (flags & SWS_AREA) {

  1474.                     int64_t d2= d - (1<<29);

  1475.                     if      (d2*xInc < -(1LL<<(29+16))) coeff= 1.0 * (1LL<<(30+16));

  1476.                     else if (d2*xInc <  (1LL<<(29+16))) coeff= -d2*xInc + (1LL<<(29+16));

  1477.                     else coeff=0.0;

  1478.                     coeff *= fone>>(30+16);

  1479.                 } else if (flags & SWS_GAUSS) {

  1480.                     double p= param[0] != SWS_PARAM_DEFAULT ? param[0] : 3.0;

  1481.                     coeff = (pow(2.0, - p*floatd*floatd))*fone;

  1482.                 } else if (flags & SWS_SINC) {

  1483.                     coeff = (d ? sin(floatd*PI)/(floatd*PI) : 1.0)*fone;

  1484.                 } else if (flags & SWS_LANCZOS) {

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

  1486.                     coeff = (d ? sin(floatd*PI)*sin(floatd*PI/p)/(floatd*floatd*PI*PI/p) : 1.0)*fone;

  1487.                     if (floatd>p) coeff=0;

  1488.                 } else if (flags & SWS_BILINEAR) {

  1489.                     coeff= (1<<30) - d;

  1490.                     if (coeff<0) coeff=0;

  1491.                     coeff *= fone >> 30;

  1492.                 } else if (flags & SWS_SPLINE) {

  1493.                     double p=-2.196152422706632;

  1494.                     coeff = getSplineCoeff(1.0, 0.0, p, -p-1.0, floatd) * fone;

  1495.                 } else {

  1496.                     coeff= 0.0; //GCC warning killer

  1497.                     assert(0);

  1498.                 }

  1499. 

  1500.                 filter[i*filterSize + j]= coeff;

  1501.                 xx++;

  1502.             }

  1503.             xDstInSrc+= 2*xInc;

  1504.         }

  1505.     }

  1506. 

  1507.     /* apply src & dst Filter to filter -> filter2

  1508.        av_free(filter);

  1509.     */

  1510.     assert(filterSize>0);

  1511.     filter2Size= filterSize;

  1512.     if (srcFilter) filter2Size+= srcFilter->length - 1;

  1513.     if (dstFilter) filter2Size+= dstFilter->length - 1;

  1514.     assert(filter2Size>0);

  1515.     FF_ALLOCZ_OR_GOTO(NULL, filter2, filter2Size*dstW*sizeof(*filter2), fail);

  1516. 

  1517.     for (i=0; i<dstW; i++) {

  1518.         int j, k;

  1519. 

  1520.         if(srcFilter) {

  1521.             for (k=0; k<srcFilter->length; k++) {

  1522.                 for (j=0; j<filterSize; j++)

  1523.                     filter2[i*filter2Size + k + j] += srcFilter->coeff[k]*filter[i*filterSize + j];

  1524.             }

  1525.         } else {

  1526.             for (j=0; j<filterSize; j++)

  1527.                 filter2[i*filter2Size + j]= filter[i*filterSize + j];

  1528.         }

  1529.         //FIXME dstFilter

  1530. 

  1531.         (*filterPos)[i]+= (filterSize-1)/2 - (filter2Size-1)/2;

  1532.     }

  1533.     av_freep(&filter);

  1534. 

  1535.     /* try to reduce the filter-size (step1 find size and shift left) */

  1536.     // Assume it is near normalized (*0.5 or *2.0 is OK but * 0.001 is not).

  1537.     minFilterSize= 0;

  1538.     for (i=dstW-1; i>=0; i--) {

  1539.         int min= filter2Size;

  1540.         int j;

  1541.         int64_t cutOff=0.0;

  1542. 

  1543.         /* get rid off near zero elements on the left by shifting left */

  1544.         for (j=0; j<filter2Size; j++) {

  1545.             int k;

  1546.             cutOff += FFABS(filter2[i*filter2Size]);

  1547. 

  1548.             if (cutOff > SWS_MAX_REDUCE_CUTOFF*fone) break;

  1549. 

  1550.             /* preserve monotonicity because the core can't handle the filter otherwise */

  1551.             if (i<dstW-1 && (*filterPos)[i] >= (*filterPos)[i+1]) break;

  1552. 

  1553.             // move filter coefficients left

  1554.             for (k=1; k<filter2Size; k++)

  1555.                 filter2[i*filter2Size + k - 1]= filter2[i*filter2Size + k];

  1556.             filter2[i*filter2Size + k - 1]= 0;

  1557.             (*filterPos)[i]++;

  1558.         }

  1559. 

  1560.         cutOff=0;

  1561.         /* count near zeros on the right */

  1562.         for (j=filter2Size-1; j>0; j--) {

  1563.             cutOff += FFABS(filter2[i*filter2Size + j]);

  1564. 

  1565.             if (cutOff > SWS_MAX_REDUCE_CUTOFF*fone) break;

  1566.             min--;

  1567.         }

  1568. 

  1569.         if (min>minFilterSize) minFilterSize= min;

  1570.     }

  1571. 

  1572.     if (flags & SWS_CPU_CAPS_ALTIVEC) {

  1573.         // we can handle the special case 4,

  1574.         // so we don't want to go to the full 8

  1575.         if (minFilterSize < 5)

  1576.             filterAlign = 4;

  1577. 

  1578.         // We really don't want to waste our time

  1579.         // doing useless computation, so fall back on

  1580.         // the scalar C code for very small filters.

  1581.         // Vectorizing is worth it only if you have a

  1582.         // decent-sized vector.

  1583.         if (minFilterSize < 3)

  1584.             filterAlign = 1;

  1585.     }

  1586. 

  1587.     if (flags & SWS_CPU_CAPS_MMX) {

  1588.         // special case for unscaled vertical filtering

  1589.         if (minFilterSize == 1 && filterAlign == 2)

  1590.             filterAlign= 1;

  1591.     }

  1592. 

  1593.     assert(minFilterSize > 0);

  1594.     filterSize= (minFilterSize +(filterAlign-1)) & (~(filterAlign-1));

  1595.     assert(filterSize > 0);

  1596.     filter= av_malloc(filterSize*dstW*sizeof(*filter));

  1597.     if (filterSize >= MAX_FILTER_SIZE*16/((flags&SWS_ACCURATE_RND) ? APCK_SIZE : 16) || !filter)

  1598.         goto fail;

  1599.     *outFilterSize= filterSize;

  1600. 

  1601.     if (flags&SWS_PRINT_INFO)

  1602.         av_log(NULL, AV_LOG_VERBOSE, "SwScaler: reducing / aligning filtersize %d -> %d\n", filter2Size, filterSize);

  1603.     /* try to reduce the filter-size (step2 reduce it) */

  1604.     for (i=0; i<dstW; i++) {

  1605.         int j;

  1606. 

  1607.         for (j=0; j<filterSize; j++) {

  1608.             if (j>=filter2Size) filter[i*filterSize + j]= 0;

  1609.             else               filter[i*filterSize + j]= filter2[i*filter2Size + j];

  1610.             if((flags & SWS_BITEXACT) && j>=minFilterSize)

  1611.                 filter[i*filterSize + j]= 0;

  1612.         }

  1613.     }

  1614. 

  1615. 

  1616.     //FIXME try to align filterPos if possible

  1617. 

  1618.     //fix borders

  1619.     for (i=0; i<dstW; i++) {

  1620.         int j;

  1621.         if ((*filterPos)[i] < 0) {

  1622.             // move filter coefficients left to compensate for filterPos

  1623.             for (j=1; j<filterSize; j++) {

  1624.                 int left= FFMAX(j + (*filterPos)[i], 0);

  1625.                 filter[i*filterSize + left] += filter[i*filterSize + j];

  1626.                 filter[i*filterSize + j]=0;

  1627.             }

  1628.             (*filterPos)[i]= 0;

  1629.         }

  1630. 

  1631.         if ((*filterPos)[i] + filterSize > srcW) {

  1632.             int shift= (*filterPos)[i] + filterSize - srcW;

  1633.             // move filter coefficients right to compensate for filterPos

  1634.             for (j=filterSize-2; j>=0; j--) {

  1635.                 int right= FFMIN(j + shift, filterSize-1);

  1636.                 filter[i*filterSize +right] += filter[i*filterSize +j];

  1637.                 filter[i*filterSize +j]=0;

  1638.             }

  1639.             (*filterPos)[i]= srcW - filterSize;

  1640.         }

  1641.     }

  1642. 

  1643.     // Note the +1 is for the MMX scaler which reads over the end

  1644.     /* align at 16 for AltiVec (needed by hScale_altivec_real) */

  1645.     FF_ALLOCZ_OR_GOTO(NULL, *outFilter, *outFilterSize*(dstW+1)*sizeof(int16_t), fail);

  1646. 

  1647.     /* normalize & store in outFilter */

  1648.     for (i=0; i<dstW; i++) {

  1649.         int j;

  1650.         int64_t error=0;

  1651.         int64_t sum=0;

  1652. 

  1653.         for (j=0; j<filterSize; j++) {

  1654.             sum+= filter[i*filterSize + j];

  1655.         }

  1656.         sum= (sum + one/2)/ one;

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

  1658.             int64_t v= filter[i*filterSize + j] + error;

  1659.             int intV= ROUNDED_DIV(v, sum);

  1660.             (*outFilter)[i*(*outFilterSize) + j]= intV;

  1661.             error= v - intV*sum;

  1662.         }

  1663.     }

  1664. 

  1665.     (*filterPos)[dstW]= (*filterPos)[dstW-1]; // the MMX scaler will read over the end

  1666.     for (i=0; i<*outFilterSize; i++) {

  1667.         int j= dstW*(*outFilterSize);

  1668.         (*outFilter)[j + i]= (*outFilter)[j + i - (*outFilterSize)];

  1669.     }

  1670. 

  1671.     ret=0;

  1672. fail:

  1673.     av_free(filter);

  1674.     av_free(filter2);

  1675.     return ret;

  1676. }

  1677. 

  1678. #ifdef COMPILE_MMX2

  1679. static int initMMX2HScaler(int dstW, int xInc, uint8_t *filterCode, int16_t *filter, int32_t *filterPos, int numSplits)

  1680. {

  1681.     uint8_t *fragmentA;

  1682.     x86_reg imm8OfPShufW1A;

  1683.     x86_reg imm8OfPShufW2A;

  1684.     x86_reg fragmentLengthA;

  1685.     uint8_t *fragmentB;

  1686.     x86_reg imm8OfPShufW1B;

  1687.     x86_reg imm8OfPShufW2B;

  1688.     x86_reg fragmentLengthB;

  1689.     int fragmentPos;

  1690. 

  1691.     int xpos, i;

  1692. 

  1693.     // create an optimized horizontal scaling routine

  1694.     /* This scaler is made of runtime-generated MMX2 code using specially

  1695.      * tuned pshufw instructions. For every four output pixels, if four

  1696.      * input pixels are enough for the fast bilinear scaling, then a chunk

  1697.      * of fragmentB is used. If five input pixels are needed, then a chunk

  1698.      * of fragmentA is used.

  1699.      */

  1700. 

  1701.     //code fragment

  1702. 

  1703.     __asm__ volatile(

  1704.         "jmp                         9f                 \n\t"

  1705.     // Begin

  1706.         "0:                                             \n\t"

  1707.         "movq    (%%"REG_d", %%"REG_a"), %%mm3          \n\t"

  1708.         "movd    (%%"REG_c", %%"REG_S"), %%mm0          \n\t"

  1709.         "movd   1(%%"REG_c", %%"REG_S"), %%mm1          \n\t"

  1710.         "punpcklbw                %%mm7, %%mm1          \n\t"

  1711.         "punpcklbw                %%mm7, %%mm0          \n\t"

  1712.         "pshufw                   $0xFF, %%mm1, %%mm1   \n\t"

  1713.         "1:                                             \n\t"

  1714.         "pshufw                   $0xFF, %%mm0, %%mm0   \n\t"

  1715.         "2:                                             \n\t"

  1716.         "psubw                    %%mm1, %%mm0          \n\t"

  1717.         "movl   8(%%"REG_b", %%"REG_a"), %%esi          \n\t"

  1718.         "pmullw                   %%mm3, %%mm0          \n\t"

  1719.         "psllw                       $7, %%mm1          \n\t"

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

  1721. 

  1722.         "movq                     %%mm0, (%%"REG_D", %%"REG_a") \n\t"

  1723. 

  1724.         "add                         $8, %%"REG_a"      \n\t"

  1725.     // End

  1726.         "9:                                             \n\t"

  1727. //        "int $3                                         \n\t"

  1728.         "lea                 " LOCAL_MANGLE(0b) ", %0   \n\t"

  1729.         "lea                 " LOCAL_MANGLE(1b) ", %1   \n\t"

  1730.         "lea                 " LOCAL_MANGLE(2b) ", %2   \n\t"

  1731.         "dec                         %1                 \n\t"

  1732.         "dec                         %2                 \n\t"

  1733.         "sub                         %0, %1             \n\t"

  1734.         "sub                         %0, %2             \n\t"

  1735.         "lea                 " LOCAL_MANGLE(9b) ", %3   \n\t"

  1736.         "sub                         %0, %3             \n\t"

  1737. 

  1738. 

  1739.         :"=r" (fragmentA), "=r" (imm8OfPShufW1A), "=r" (imm8OfPShufW2A),

  1740.         "=r" (fragmentLengthA)

  1741.     );

  1742. 

  1743.     __asm__ volatile(

  1744.         "jmp                         9f                 \n\t"

  1745.     // Begin

  1746.         "0:                                             \n\t"

  1747.         "movq    (%%"REG_d", %%"REG_a"), %%mm3          \n\t"

  1748.         "movd    (%%"REG_c", %%"REG_S"), %%mm0          \n\t"

  1749.         "punpcklbw                %%mm7, %%mm0          \n\t"

  1750.         "pshufw                   $0xFF, %%mm0, %%mm1   \n\t"

  1751.         "1:                                             \n\t"

  1752.         "pshufw                   $0xFF, %%mm0, %%mm0   \n\t"

  1753.         "2:                                             \n\t"

  1754.         "psubw                    %%mm1, %%mm0          \n\t"

  1755.         "movl   8(%%"REG_b", %%"REG_a"), %%esi          \n\t"

  1756.         "pmullw                   %%mm3, %%mm0          \n\t"

  1757.         "psllw                       $7, %%mm1          \n\t"

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

  1759. 

  1760.         "movq                     %%mm0, (%%"REG_D", %%"REG_a") \n\t"

  1761. 

  1762.         "add                         $8, %%"REG_a"      \n\t"

  1763.     // End

  1764.         "9:                                             \n\t"

  1765. //        "int                       $3                   \n\t"

  1766.         "lea                 " LOCAL_MANGLE(0b) ", %0   \n\t"

  1767.         "lea                 " LOCAL_MANGLE(1b) ", %1   \n\t"

  1768.         "lea                 " LOCAL_MANGLE(2b) ", %2   \n\t"

  1769.         "dec                         %1                 \n\t"

  1770.         "dec                         %2                 \n\t"

  1771.         "sub                         %0, %1             \n\t"

  1772.         "sub                         %0, %2             \n\t"

  1773.         "lea                 " LOCAL_MANGLE(9b) ", %3   \n\t"

  1774.         "sub                         %0, %3             \n\t"

  1775. 

  1776. 

  1777.         :"=r" (fragmentB), "=r" (imm8OfPShufW1B), "=r" (imm8OfPShufW2B),

  1778.         "=r" (fragmentLengthB)

  1779.     );

  1780. 

  1781.     xpos= 0; //lumXInc/2 - 0x8000; // difference between pixel centers

  1782.     fragmentPos=0;

  1783. 

  1784.     for (i=0; i<dstW/numSplits; i++) {

  1785.         int xx=xpos>>16;

  1786. 

  1787.         if ((i&3) == 0) {

  1788.             int a=0;

  1789.             int b=((xpos+xInc)>>16) - xx;

  1790.             int c=((xpos+xInc*2)>>16) - xx;

  1791.             int d=((xpos+xInc*3)>>16) - xx;

  1792.             int inc                = (d+1<4);

  1793.             uint8_t *fragment      = (d+1<4) ? fragmentB       : fragmentA;

  1794.             x86_reg imm8OfPShufW1  = (d+1<4) ? imm8OfPShufW1B  : imm8OfPShufW1A;

  1795.             x86_reg imm8OfPShufW2  = (d+1<4) ? imm8OfPShufW2B  : imm8OfPShufW2A;

  1796.             x86_reg fragmentLength = (d+1<4) ? fragmentLengthB : fragmentLengthA;

  1797.             int maxShift= 3-(d+inc);

  1798.             int shift=0;

  1799. 

  1800.             if (filterCode) {

  1801.                 filter[i  ] = (( xpos         & 0xFFFF) ^ 0xFFFF)>>9;

  1802.                 filter[i+1] = (((xpos+xInc  ) & 0xFFFF) ^ 0xFFFF)>>9;

  1803.                 filter[i+2] = (((xpos+xInc*2) & 0xFFFF) ^ 0xFFFF)>>9;

  1804.                 filter[i+3] = (((xpos+xInc*3) & 0xFFFF) ^ 0xFFFF)>>9;

  1805.                 filterPos[i/2]= xx;

  1806. 

  1807.                 memcpy(filterCode + fragmentPos, fragment, fragmentLength);

  1808. 

  1809.                 filterCode[fragmentPos + imm8OfPShufW1]=

  1810.                     (a+inc) | ((b+inc)<<2) | ((c+inc)<<4) | ((d+inc)<<6);

  1811.                 filterCode[fragmentPos + imm8OfPShufW2]=

  1812.                     a | (b<<2) | (c<<4) | (d<<6);

  1813. 

  1814.                 if (i+4-inc>=dstW) shift=maxShift; //avoid overread

  1815.                 else if ((filterPos[i/2]&3) <= maxShift) shift=filterPos[i/2]&3; //Align

  1816. 

  1817.                 if (shift && i>=shift) {

  1818.                     filterCode[fragmentPos + imm8OfPShufW1]+= 0x55*shift;

  1819.                     filterCode[fragmentPos + imm8OfPShufW2]+= 0x55*shift;

  1820.                     filterPos[i/2]-=shift;

  1821.                 }

  1822.             }

  1823. 

  1824.             fragmentPos+= fragmentLength;

  1825. 

  1826.             if (filterCode)

  1827.                 filterCode[fragmentPos]= RET;

  1828.         }

  1829.         xpos+=xInc;

  1830.     }

  1831.     if (filterCode)

  1832.         filterPos[((i/2)+1)&(~1)]= xpos>>16; // needed to jump to the next part

  1833. 

  1834.     return fragmentPos + 1;

  1835. }

  1836. #endif /* COMPILE_MMX2 */

  1837. 

  1838. static void globalInit(void)

  1839. {

  1840.     // generating tables:

  1841.     int i;

  1842.     for (i=0; i<768; i++) {

  1843.         int c= av_clip_uint8(i-256);

  1844.         clip_table[i]=c;

  1845.     }

  1846. }

  1847. 

  1848. static SwsFunc getSwsFunc(SwsContext *c)

  1849. {

  1850. #if CONFIG_RUNTIME_CPUDETECT

  1851.     int flags = c->flags;

  1852. 

  1853. #if ARCH_X86 && CONFIG_GPL

  1854.     // ordered per speed fastest first

  1855.     if (flags & SWS_CPU_CAPS_MMX2) {

  1856.         sws_init_swScale_MMX2(c);

  1857.         return swScale_MMX2;

  1858.     } else if (flags & SWS_CPU_CAPS_3DNOW) {

  1859.         sws_init_swScale_3DNow(c);

  1860.         return swScale_3DNow;

  1861.     } else if (flags & SWS_CPU_CAPS_MMX) {

  1862.         sws_init_swScale_MMX(c);

  1863.         return swScale_MMX;

  1864.     } else {

  1865.         sws_init_swScale_C(c);

  1866.         return swScale_C;

  1867.     }

  1868. 

  1869. #else

  1870. #if ARCH_PPC

  1871.     if (flags & SWS_CPU_CAPS_ALTIVEC) {

  1872.         sws_init_swScale_altivec(c);

  1873.         return swScale_altivec;

  1874.     } else {

  1875.         sws_init_swScale_C(c);

  1876.         return swScale_C;

  1877.     }

  1878. #endif

  1879.     sws_init_swScale_C(c);

  1880.     return swScale_C;

  1881. #endif /* ARCH_X86 && CONFIG_GPL */

  1882. #else //CONFIG_RUNTIME_CPUDETECT

  1883. #if   COMPILE_TEMPLATE_MMX2

  1884.     sws_init_swScale_MMX2(c);

  1885.     return swScale_MMX2;

  1886. #elif COMPILE_TEMPLATE_AMD3DNOW

  1887.     sws_init_swScale_3DNow(c);

  1888.     return swScale_3DNow;

  1889. #elif COMPILE_TEMPLATE_MMX

  1890.     sws_init_swScale_MMX(c);

  1891.     return swScale_MMX;

  1892. #elif COMPILE_TEMPLATE_ALTIVEC

  1893.     sws_init_swScale_altivec(c);

  1894.     return swScale_altivec;

  1895. #else

  1896.     sws_init_swScale_C(c);

  1897.     return swScale_C;

  1898. #endif

  1899. #endif //!CONFIG_RUNTIME_CPUDETECT

  1900. }

  1901. 

  1902. static int PlanarToNV12Wrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1903.                                int srcSliceH, uint8_t* dstParam[], int dstStride[])

  1904. {

  1905.     uint8_t *dst=dstParam[0] + dstStride[0]*srcSliceY;

  1906.     /* Copy Y plane */

  1907.     if (dstStride[0]==srcStride[0] && srcStride[0] > 0)

  1908.         memcpy(dst, src[0], srcSliceH*dstStride[0]);

  1909.     else {

  1910.         int i;

  1911.         const uint8_t *srcPtr= src[0];

  1912.         uint8_t *dstPtr= dst;

  1913.         for (i=0; i<srcSliceH; i++) {

  1914.             memcpy(dstPtr, srcPtr, c->srcW);

  1915.             srcPtr+= srcStride[0];

  1916.             dstPtr+= dstStride[0];

  1917.         }

  1918.     }

  1919.     dst = dstParam[1] + dstStride[1]*srcSliceY/2;

  1920.     if (c->dstFormat == PIX_FMT_NV12)

  1921.         interleaveBytes(src[1], src[2], dst, c->srcW/2, srcSliceH/2, srcStride[1], srcStride[2], dstStride[0]);

  1922.     else

  1923.         interleaveBytes(src[2], src[1], dst, c->srcW/2, srcSliceH/2, srcStride[2], srcStride[1], dstStride[0]);

  1924. 

  1925.     return srcSliceH;

  1926. }

  1927. 

  1928. static int PlanarToYuy2Wrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

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

  1930. {

  1931.     uint8_t *dst=dstParam[0] + dstStride[0]*srcSliceY;

  1932. 

  1933.     yv12toyuy2(src[0], src[1], src[2], dst, c->srcW, srcSliceH, srcStride[0], srcStride[1], dstStride[0]);

  1934. 

  1935.     return srcSliceH;

  1936. }

  1937. 

  1938. static int PlanarToUyvyWrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1939.                                int srcSliceH, uint8_t* dstParam[], int dstStride[])

  1940. {

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

  1942. 

  1943.     yv12touyvy(src[0], src[1], src[2], dst, c->srcW, srcSliceH, srcStride[0], srcStride[1], dstStride[0]);

  1944. 

  1945.     return srcSliceH;

  1946. }

  1947. 

  1948. static int YUV422PToYuy2Wrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1949.                                 int srcSliceH, uint8_t* dstParam[], int dstStride[])

  1950. {

  1951.     uint8_t *dst=dstParam[0] + dstStride[0]*srcSliceY;

  1952. 

  1953.     yuv422ptoyuy2(src[0],src[1],src[2],dst,c->srcW,srcSliceH,srcStride[0],srcStride[1],dstStride[0]);

  1954. 

  1955.     return srcSliceH;

  1956. }

  1957. 

  1958. static int YUV422PToUyvyWrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1959.                                 int srcSliceH, uint8_t* dstParam[], int dstStride[])

  1960. {

  1961.     uint8_t *dst=dstParam[0] + dstStride[0]*srcSliceY;

  1962. 

  1963.     yuv422ptouyvy(src[0],src[1],src[2],dst,c->srcW,srcSliceH,srcStride[0],srcStride[1],dstStride[0]);

  1964. 

  1965.     return srcSliceH;

  1966. }

  1967. 

  1968. static int YUYV2YUV420Wrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1969.                                int srcSliceH, uint8_t* dstParam[], int dstStride[])

  1970. {

  1971.     uint8_t *ydst=dstParam[0] + dstStride[0]*srcSliceY;

  1972.     uint8_t *udst=dstParam[1] + dstStride[1]*srcSliceY/2;

  1973.     uint8_t *vdst=dstParam[2] + dstStride[2]*srcSliceY/2;

  1974. 

  1975.     yuyvtoyuv420(ydst, udst, vdst, src[0], c->srcW, srcSliceH, dstStride[0], dstStride[1], srcStride[0]);

  1976. 

  1977.     if (dstParam[3])

  1978.         fillPlane(dstParam[3], dstStride[3], c->srcW, srcSliceH, srcSliceY, 255);

  1979. 

  1980.     return srcSliceH;

  1981. }

  1982. 

  1983. static int YUYV2YUV422Wrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1984.                                int srcSliceH, uint8_t* dstParam[], int dstStride[])

  1985. {

  1986.     uint8_t *ydst=dstParam[0] + dstStride[0]*srcSliceY;

  1987.     uint8_t *udst=dstParam[1] + dstStride[1]*srcSliceY;

  1988.     uint8_t *vdst=dstParam[2] + dstStride[2]*srcSliceY;

  1989. 

  1990.     yuyvtoyuv422(ydst, udst, vdst, src[0], c->srcW, srcSliceH, dstStride[0], dstStride[1], srcStride[0]);

  1991. 

  1992.     return srcSliceH;

  1993. }

  1994. 

  1995. static int UYVY2YUV420Wrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1996.                                int srcSliceH, uint8_t* dstParam[], int dstStride[])

  1997. {

  1998.     uint8_t *ydst=dstParam[0] + dstStride[0]*srcSliceY;

  1999.     uint8_t *udst=dstParam[1] + dstStride[1]*srcSliceY/2;

  2000.     uint8_t *vdst=dstParam[2] + dstStride[2]*srcSliceY/2;

  2001. 

  2002.     uyvytoyuv420(ydst, udst, vdst, src[0], c->srcW, srcSliceH, dstStride[0], dstStride[1], srcStride[0]);

  2003. 

  2004.     if (dstParam[3])

  2005.         fillPlane(dstParam[3], dstStride[3], c->srcW, srcSliceH, srcSliceY, 255);

  2006. 

  2007.     return srcSliceH;

  2008. }

  2009. 

  2010. static int UYVY2YUV422Wrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  2011.                                int srcSliceH, uint8_t* dstParam[], int dstStride[])

  2012. {

  2013.     uint8_t *ydst=dstParam[0] + dstStride[0]*srcSliceY;

  2014.     uint8_t *udst=dstParam[1] + dstStride[1]*srcSliceY;

  2015.     uint8_t *vdst=dstParam[2] + dstStride[2]*srcSliceY;

  2016. 

  2017.     uyvytoyuv422(ydst, udst, vdst, src[0], c->srcW, srcSliceH, dstStride[0], dstStride[1], srcStride[0]);

  2018. 

  2019.     return srcSliceH;

  2020. }

  2021. 

  2022. static int pal2rgbWrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  2023.                           int srcSliceH, uint8_t* dst[], int dstStride[])

  2024. {

  2025.     const enum PixelFormat srcFormat= c->srcFormat;

  2026.     const enum PixelFormat dstFormat= c->dstFormat;

  2027.     void (*conv)(const uint8_t *src, uint8_t *dst, long num_pixels,

  2028.                  const uint8_t *palette)=NULL;

  2029.     int i;

  2030.     uint8_t *dstPtr= dst[0] + dstStride[0]*srcSliceY;

  2031.     uint8_t *srcPtr= src[0];

  2032. 

  2033.     if (!usePal(srcFormat))

  2034.         av_log(c, AV_LOG_ERROR, "internal error %s -> %s converter\n",

  2035.                sws_format_name(srcFormat), sws_format_name(dstFormat));

  2036. 

  2037.     switch(dstFormat) {

  2038.     case PIX_FMT_RGB32  : conv = palette8topacked32; break;

  2039.     case PIX_FMT_BGR32  : conv = palette8topacked32; break;

  2040.     case PIX_FMT_BGR32_1: conv = palette8topacked32; break;

  2041.     case PIX_FMT_RGB32_1: conv = palette8topacked32; break;

  2042.     case PIX_FMT_RGB24  : conv = palette8topacked24; break;

  2043.     case PIX_FMT_BGR24  : conv = palette8topacked24; break;

  2044.     default: av_log(c, AV_LOG_ERROR, "internal error %s -> %s converter\n",

  2045.                     sws_format_name(srcFormat), sws_format_name(dstFormat)); break;

  2046.     }

  2047. 

  2048. 

  2049.     for (i=0; i<srcSliceH; i++) {

  2050.         conv(srcPtr, dstPtr, c->srcW, (uint8_t *) c->pal_rgb);

  2051.         srcPtr+= srcStride[0];

  2052.         dstPtr+= dstStride[0];

  2053.     }

  2054. 

  2055.     return srcSliceH;

  2056. }

  2057. 

  2058. /* {RGB,BGR}{15,16,24,32,32_1} -> {RGB,BGR}{15,16,24,32} */

  2059. static int rgb2rgbWrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  2060.                           int srcSliceH, uint8_t* dst[], int dstStride[])

  2061. {

  2062.     const enum PixelFormat srcFormat= c->srcFormat;

  2063.     const enum PixelFormat dstFormat= c->dstFormat;

  2064.     const int srcBpp= (fmt_depth(srcFormat) + 7) >> 3;

  2065.     const int dstBpp= (fmt_depth(dstFormat) + 7) >> 3;

  2066.     const int srcId= fmt_depth(srcFormat) >> 2; /* 1:0, 4:1, 8:2, 15:3, 16:4, 24:6, 32:8 */

  2067.     const int dstId= fmt_depth(dstFormat) >> 2;

  2068.     void (*conv)(const uint8_t *src, uint8_t *dst, long src_size)=NULL;

  2069. 

  2070.     /* BGR -> BGR */

  2071.     if (  (isBGR(srcFormat) && isBGR(dstFormat))

  2072.        || (isRGB(srcFormat) && isRGB(dstFormat))) {

  2073.         switch(srcId | (dstId<<4)) {

  2074.         case 0x34: conv= rgb16to15; break;

  2075.         case 0x36: conv= rgb24to15; break;

  2076.         case 0x38: conv= rgb32to15; break;

  2077.         case 0x43: conv= rgb15to16; break;

  2078.         case 0x46: conv= rgb24to16; break;

  2079.         case 0x48: conv= rgb32to16; break;

  2080.         case 0x63: conv= rgb15to24; break;

  2081.         case 0x64: conv= rgb16to24; break;

  2082.         case 0x68: conv= rgb32to24; break;

  2083.         case 0x83: conv= rgb15to32; break;

  2084.         case 0x84: conv= rgb16to32; break;

  2085.         case 0x86: conv= rgb24to32; break;

  2086.         default: av_log(c, AV_LOG_ERROR, "internal error %s -> %s converter\n",

  2087.                         sws_format_name(srcFormat), sws_format_name(dstFormat)); break;

  2088.         }

  2089.     } else if (  (isBGR(srcFormat) && isRGB(dstFormat))

  2090.              || (isRGB(srcFormat) && isBGR(dstFormat))) {

  2091.         switch(srcId | (dstId<<4)) {

  2092.         case 0x33: conv= rgb15tobgr15; break;

  2093.         case 0x34: conv= rgb16tobgr15; break;

  2094.         case 0x36: conv= rgb24tobgr15; break;

  2095.         case 0x38: conv= rgb32tobgr15; break;

  2096.         case 0x43: conv= rgb15tobgr16; break;

  2097.         case 0x44: conv= rgb16tobgr16; break;

  2098.         case 0x46: conv= rgb24tobgr16; break;

  2099.         case 0x48: conv= rgb32tobgr16; break;

  2100.         case 0x63: conv= rgb15tobgr24; break;

  2101.         case 0x64: conv= rgb16tobgr24; break;

  2102.         case 0x66: conv= rgb24tobgr24; break;

  2103.         case 0x68: conv= rgb32tobgr24; break;

  2104.         case 0x83: conv= rgb15tobgr32; break;

  2105.         case 0x84: conv= rgb16tobgr32; break;

  2106.         case 0x86: conv= rgb24tobgr32; break;

  2107.         case 0x88: conv= rgb32tobgr32; break;

  2108.         default: av_log(c, AV_LOG_ERROR, "internal error %s -> %s converter\n",

  2109.                         sws_format_name(srcFormat), sws_format_name(dstFormat)); break;

  2110.         }

  2111.     } else {

  2112.         av_log(c, AV_LOG_ERROR, "internal error %s -> %s converter\n",

  2113.                sws_format_name(srcFormat), sws_format_name(dstFormat));

  2114.     }

  2115. 

  2116.     if(conv) {

  2117.         uint8_t *srcPtr= src[0];

  2118.         if(srcFormat == PIX_FMT_RGB32_1 || srcFormat == PIX_FMT_BGR32_1)

  2119.             srcPtr += ALT32_CORR;

  2120. 

  2121.         if (dstStride[0]*srcBpp == srcStride[0]*dstBpp && srcStride[0] > 0)

  2122.             conv(srcPtr, dst[0] + dstStride[0]*srcSliceY, srcSliceH*srcStride[0]);

  2123.         else {

  2124.             int i;

  2125.             uint8_t *dstPtr= dst[0] + dstStride[0]*srcSliceY;

  2126. 

  2127.             for (i=0; i<srcSliceH; i++) {

  2128.                 conv(srcPtr, dstPtr, c->srcW*srcBpp);

  2129.                 srcPtr+= srcStride[0];

  2130.                 dstPtr+= dstStride[0];

  2131.             }

  2132.         }

  2133.     }

  2134.     return srcSliceH;

  2135. }

  2136. 

  2137. static int bgr24toyv12Wrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  2138.                               int srcSliceH, uint8_t* dst[], int dstStride[])

  2139. {

  2140. 

  2141.     rgb24toyv12(

  2142.         src[0],

  2143.         dst[0]+ srcSliceY    *dstStride[0],

  2144.         dst[1]+(srcSliceY>>1)*dstStride[1],

  2145.         dst[2]+(srcSliceY>>1)*dstStride[2],

  2146.         c->srcW, srcSliceH,

  2147.         dstStride[0], dstStride[1], srcStride[0]);

  2148.     if (dst[3])

  2149.         fillPlane(dst[3], dstStride[3], c->srcW, srcSliceH, srcSliceY, 255);

  2150.     return srcSliceH;

  2151. }

  2152. 

  2153. static int yvu9toyv12Wrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  2154.                              int srcSliceH, uint8_t* dst[], int dstStride[])

  2155. {

  2156.     int i;

  2157. 

  2158.     /* copy Y */

  2159.     if (srcStride[0]==dstStride[0] && srcStride[0] > 0)

  2160.         memcpy(dst[0]+ srcSliceY*dstStride[0], src[0], srcStride[0]*srcSliceH);

  2161.     else {

  2162.         uint8_t *srcPtr= src[0];

  2163.         uint8_t *dstPtr= dst[0] + dstStride[0]*srcSliceY;

  2164. 

  2165.         for (i=0; i<srcSliceH; i++) {

  2166.             memcpy(dstPtr, srcPtr, c->srcW);

  2167.             srcPtr+= srcStride[0];

  2168.             dstPtr+= dstStride[0];

  2169.         }

  2170.     }

  2171. 

  2172.     if (c->dstFormat==PIX_FMT_YUV420P || c->dstFormat==PIX_FMT_YUVA420P) {

  2173.         planar2x(src[1], dst[1] + dstStride[1]*(srcSliceY >> 1), c->chrSrcW,

  2174.                  srcSliceH >> 2, srcStride[1], dstStride[1]);

  2175.         planar2x(src[2], dst[2] + dstStride[2]*(srcSliceY >> 1), c->chrSrcW,

  2176.                  srcSliceH >> 2, srcStride[2], dstStride[2]);

  2177.     } else {

  2178.         planar2x(src[1], dst[2] + dstStride[2]*(srcSliceY >> 1), c->chrSrcW,

  2179.                  srcSliceH >> 2, srcStride[1], dstStride[2]);

  2180.         planar2x(src[2], dst[1] + dstStride[1]*(srcSliceY >> 1), c->chrSrcW,

  2181.                  srcSliceH >> 2, srcStride[2], dstStride[1]);

  2182.     }

  2183.     if (dst[3])

  2184.         fillPlane(dst[3], dstStride[3], c->srcW, srcSliceH, srcSliceY, 255);

  2185.     return srcSliceH;

  2186. }

  2187. 

  2188. /* unscaled copy like stuff (assumes nearly identical formats) */

  2189. static int packedCopy(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  2190.                       int srcSliceH, uint8_t* dst[], int dstStride[])

  2191. {

  2192.     if (dstStride[0]==srcStride[0] && srcStride[0] > 0)

  2193.         memcpy(dst[0] + dstStride[0]*srcSliceY, src[0], srcSliceH*dstStride[0]);

  2194.     else {

  2195.         int i;

  2196.         uint8_t *srcPtr= src[0];

  2197.         uint8_t *dstPtr= dst[0] + dstStride[0]*srcSliceY;

  2198.         int length=0;

  2199. 

  2200.         /* universal length finder */

  2201.         while(length+c->srcW <= FFABS(dstStride[0])

  2202.            && length+c->srcW <= FFABS(srcStride[0])) length+= c->srcW;

  2203.         assert(length!=0);

  2204. 

  2205.         for (i=0; i<srcSliceH; i++) {

  2206.             memcpy(dstPtr, srcPtr, length);

  2207.             srcPtr+= srcStride[0];

  2208.             dstPtr+= dstStride[0];

  2209.         }

  2210.     }

  2211.     return srcSliceH;

  2212. }

  2213. 

  2214. static int planarCopy(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  2215.                       int srcSliceH, uint8_t* dst[], int dstStride[])

  2216. {

  2217.     int plane, i, j;

  2218.     for (plane=0; plane<4; plane++) {

  2219.         int length= (plane==0 || plane==3) ? c->srcW  : -((-c->srcW  )>>c->chrDstHSubSample);

  2220.         int y=      (plane==0 || plane==3) ? srcSliceY: -((-srcSliceY)>>c->chrDstVSubSample);

  2221.         int height= (plane==0 || plane==3) ? srcSliceH: -((-srcSliceH)>>c->chrDstVSubSample);

  2222.         uint8_t *srcPtr= src[plane];

  2223.         uint8_t *dstPtr= dst[plane] + dstStride[plane]*y;

  2224. 

  2225.         if (!dst[plane]) continue;

  2226.         // ignore palette for GRAY8

  2227.         if (plane == 1 && !dst[2]) continue;

  2228.         if (!src[plane] || (plane == 1 && !src[2])) {

  2229.             if(is16BPS(c->dstFormat))

  2230.                 length*=2;

  2231.             fillPlane(dst[plane], dstStride[plane], length, height, y, (plane==3) ? 255 : 128);

  2232.         } else {

  2233.             if(is16BPS(c->srcFormat) && !is16BPS(c->dstFormat)) {

  2234.                 if (!isBE(c->srcFormat)) srcPtr++;

  2235.                 for (i=0; i<height; i++) {

  2236.                     for (j=0; j<length; j++) dstPtr[j] = srcPtr[j<<1];

  2237.                     srcPtr+= srcStride[plane];

  2238.                     dstPtr+= dstStride[plane];

  2239.                 }

  2240.             } else if(!is16BPS(c->srcFormat) && is16BPS(c->dstFormat)) {

  2241.                 for (i=0; i<height; i++) {

  2242.                     for (j=0; j<length; j++) {

  2243.                         dstPtr[ j<<1   ] = srcPtr[j];

  2244.                         dstPtr[(j<<1)+1] = srcPtr[j];

  2245.                     }

  2246.                     srcPtr+= srcStride[plane];

  2247.                     dstPtr+= dstStride[plane];

  2248.                 }

  2249.             } else if(is16BPS(c->srcFormat) && is16BPS(c->dstFormat)

  2250.                   && isBE(c->srcFormat) != isBE(c->dstFormat)) {

  2251. 

  2252.                 for (i=0; i<height; i++) {

  2253.                     for (j=0; j<length; j++)

  2254.                         ((uint16_t*)dstPtr)[j] = bswap_16(((uint16_t*)srcPtr)[j]);

  2255.                     srcPtr+= srcStride[plane];

  2256.                     dstPtr+= dstStride[plane];

  2257.                 }

  2258.             } else if (dstStride[plane]==srcStride[plane] && srcStride[plane] > 0)

  2259.                 memcpy(dst[plane] + dstStride[plane]*y, src[plane], height*dstStride[plane]);

  2260.             else {

  2261.                 if(is16BPS(c->srcFormat) && is16BPS(c->dstFormat))

  2262.                     length*=2;

  2263.                 for (i=0; i<height; i++) {

  2264.                     memcpy(dstPtr, srcPtr, length);

  2265.                     srcPtr+= srcStride[plane];

  2266.                     dstPtr+= dstStride[plane];

  2267.                 }

  2268.             }

  2269.         }

  2270.     }

  2271.     return srcSliceH;

  2272. }

  2273. 

  2274. 

  2275. static void getSubSampleFactors(int *h, int *v, enum PixelFormat format)

  2276. {

  2277.     *h = av_pix_fmt_descriptors[format].log2_chroma_w;

  2278.     *v = av_pix_fmt_descriptors[format].log2_chroma_h;

  2279. }

  2280. 

  2281. static uint16_t roundToInt16(int64_t f)

  2282. {

  2283.     int r= (f + (1<<15))>>16;

  2284.          if (r<-0x7FFF) return 0x8000;

  2285.     else if (r> 0x7FFF) return 0x7FFF;

  2286.     else                return r;

  2287. }

  2288. 

  2289. int sws_setColorspaceDetails(SwsContext *c, const int inv_table[4], int srcRange, const int table[4], int dstRange, int brightness, int contrast, int saturation)

  2290. {

  2291.     int64_t crv =  inv_table[0];

  2292.     int64_t cbu =  inv_table[1];

  2293.     int64_t cgu = -inv_table[2];

  2294.     int64_t cgv = -inv_table[3];

  2295.     int64_t cy  = 1<<16;

  2296.     int64_t oy  = 0;

  2297. 

  2298.     memcpy(c->srcColorspaceTable, inv_table, sizeof(int)*4);

  2299.     memcpy(c->dstColorspaceTable,     table, sizeof(int)*4);

  2300. 

  2301.     c->brightness= brightness;

  2302.     c->contrast  = contrast;

  2303.     c->saturation= saturation;

  2304.     c->srcRange  = srcRange;

  2305.     c->dstRange  = dstRange;

  2306.     if (isYUV(c->dstFormat) || isGray(c->dstFormat)) return -1;

  2307. 

  2308.     c->uOffset=   0x0400040004000400LL;

  2309.     c->vOffset=   0x0400040004000400LL;

  2310. 

  2311.     if (!srcRange) {

  2312.         cy= (cy*255) / 219;

  2313.         oy= 16<<16;

  2314.     } else {

  2315.         crv= (crv*224) / 255;

  2316.         cbu= (cbu*224) / 255;

  2317.         cgu= (cgu*224) / 255;

  2318.         cgv= (cgv*224) / 255;

  2319.     }

  2320. 

  2321.     cy = (cy *contrast             )>>16;

  2322.     crv= (crv*contrast * saturation)>>32;

  2323.     cbu= (cbu*contrast * saturation)>>32;

  2324.     cgu= (cgu*contrast * saturation)>>32;

  2325.     cgv= (cgv*contrast * saturation)>>32;

  2326. 

  2327.     oy -= 256*brightness;

  2328. 

  2329.     c->yCoeff=    roundToInt16(cy *8192) * 0x0001000100010001ULL;

  2330.     c->vrCoeff=   roundToInt16(crv*8192) * 0x0001000100010001ULL;

  2331.     c->ubCoeff=   roundToInt16(cbu*8192) * 0x0001000100010001ULL;

  2332.     c->vgCoeff=   roundToInt16(cgv*8192) * 0x0001000100010001ULL;

  2333.     c->ugCoeff=   roundToInt16(cgu*8192) * 0x0001000100010001ULL;

  2334.     c->yOffset=   roundToInt16(oy *   8) * 0x0001000100010001ULL;

  2335. 

  2336.     c->yuv2rgb_y_coeff  = (int16_t)roundToInt16(cy <<13);

  2337.     c->yuv2rgb_y_offset = (int16_t)roundToInt16(oy << 9);

  2338.     c->yuv2rgb_v2r_coeff= (int16_t)roundToInt16(crv<<13);

  2339.     c->yuv2rgb_v2g_coeff= (int16_t)roundToInt16(cgv<<13);

  2340.     c->yuv2rgb_u2g_coeff= (int16_t)roundToInt16(cgu<<13);

  2341.     c->yuv2rgb_u2b_coeff= (int16_t)roundToInt16(cbu<<13);

  2342. 

  2343.     ff_yuv2rgb_c_init_tables(c, inv_table, srcRange, brightness, contrast, saturation);

  2344.     //FIXME factorize

  2345. 

  2346. #ifdef COMPILE_ALTIVEC

  2347.     if (c->flags & SWS_CPU_CAPS_ALTIVEC)

  2348.         ff_yuv2rgb_init_tables_altivec(c, inv_table, brightness, contrast, saturation);

  2349. #endif

  2350.     return 0;

  2351. }

  2352. 

  2353. int sws_getColorspaceDetails(SwsContext *c, int **inv_table, int *srcRange, int **table, int *dstRange, int *brightness, int *contrast, int *saturation)

  2354. {

  2355.     if (isYUV(c->dstFormat) || isGray(c->dstFormat)) return -1;

  2356. 

  2357.     *inv_table = c->srcColorspaceTable;

  2358.     *table     = c->dstColorspaceTable;

  2359.     *srcRange  = c->srcRange;

  2360.     *dstRange  = c->dstRange;

  2361.     *brightness= c->brightness;

  2362.     *contrast  = c->contrast;

  2363.     *saturation= c->saturation;

  2364. 

  2365.     return 0;

  2366. }

  2367. 

  2368. static int handle_jpeg(enum PixelFormat *format)

  2369. {

  2370.     switch (*format) {

  2371.     case PIX_FMT_YUVJ420P:

  2372.         *format = PIX_FMT_YUV420P;

  2373.         return 1;

  2374.     case PIX_FMT_YUVJ422P:

  2375.         *format = PIX_FMT_YUV422P;

  2376.         return 1;

  2377.     case PIX_FMT_YUVJ444P:

  2378.         *format = PIX_FMT_YUV444P;

  2379.         return 1;

  2380.     case PIX_FMT_YUVJ440P:

  2381.         *format = PIX_FMT_YUV440P;

  2382.         return 1;

  2383.     default:

  2384.         return 0;

  2385.     }

  2386. }

  2387. 

  2388. SwsContext *sws_getContext(int srcW, int srcH, enum PixelFormat srcFormat, int dstW, int dstH, enum PixelFormat dstFormat, int flags,

  2389.                            SwsFilter *srcFilter, SwsFilter *dstFilter, const double *param)

  2390. {

  2391. 

  2392.     SwsContext *c;

  2393.     int i;

  2394.     int usesVFilter, usesHFilter;

  2395.     int unscaled, needsDither;

  2396.     int srcRange, dstRange;

  2397.     SwsFilter dummyFilter= {NULL, NULL, NULL, NULL};

  2398. #if ARCH_X86

  2399.     if (flags & SWS_CPU_CAPS_MMX)

  2400.         __asm__ volatile("emms\n\t"::: "memory");

  2401. #endif

  2402. 

  2403. #if !CONFIG_RUNTIME_CPUDETECT //ensure that the flags match the compiled variant if cpudetect is off

  2404.     flags &= ~(SWS_CPU_CAPS_MMX|SWS_CPU_CAPS_MMX2|SWS_CPU_CAPS_3DNOW|SWS_CPU_CAPS_ALTIVEC|SWS_CPU_CAPS_BFIN);

  2405. #if   COMPILE_TEMPLATE_MMX2

  2406.     flags |= SWS_CPU_CAPS_MMX|SWS_CPU_CAPS_MMX2;

  2407. #elif COMPILE_TEMPLATE_AMD3DNOW

  2408.     flags |= SWS_CPU_CAPS_MMX|SWS_CPU_CAPS_3DNOW;

  2409. #elif COMPILE_TEMPLATE_MMX

  2410.     flags |= SWS_CPU_CAPS_MMX;

  2411. #elif COMPILE_TEMPLATE_ALTIVEC

  2412.     flags |= SWS_CPU_CAPS_ALTIVEC;

  2413. #elif ARCH_BFIN

  2414.     flags |= SWS_CPU_CAPS_BFIN;

  2415. #endif

  2416. #endif /* CONFIG_RUNTIME_CPUDETECT */

  2417.     if (clip_table[512] != 255) globalInit();

  2418.     if (!rgb15to16) sws_rgb2rgb_init(flags);

  2419. 

  2420.     unscaled = (srcW == dstW && srcH == dstH);

  2421.     needsDither= (isBGR(dstFormat) || isRGB(dstFormat))

  2422.         && (fmt_depth(dstFormat))<24

  2423.         && ((fmt_depth(dstFormat))<(fmt_depth(srcFormat)) || (!(isRGB(srcFormat) || isBGR(srcFormat))));

  2424. 

  2425.     srcRange = handle_jpeg(&srcFormat);

  2426.     dstRange = handle_jpeg(&dstFormat);

  2427. 

  2428.     if (!isSupportedIn(srcFormat)) {

  2429.         av_log(NULL, AV_LOG_ERROR, "swScaler: %s is not supported as input pixel format\n", sws_format_name(srcFormat));

  2430.         return NULL;

  2431.     }

  2432.     if (!isSupportedOut(dstFormat)) {

  2433.         av_log(NULL, AV_LOG_ERROR, "swScaler: %s is not supported as output pixel format\n", sws_format_name(dstFormat));

  2434.         return NULL;

  2435.     }

  2436. 

  2437.     i= flags & ( SWS_POINT

  2438.                 |SWS_AREA

  2439.                 |SWS_BILINEAR

  2440.                 |SWS_FAST_BILINEAR

  2441.                 |SWS_BICUBIC

  2442.                 |SWS_X

  2443.                 |SWS_GAUSS

  2444.                 |SWS_LANCZOS

  2445.                 |SWS_SINC

  2446.                 |SWS_SPLINE

  2447.                 |SWS_BICUBLIN);

  2448.     if(!i || (i & (i-1))) {

  2449.         av_log(NULL, AV_LOG_ERROR, "swScaler: Exactly one scaler algorithm must be chosen\n");

  2450.         return NULL;

  2451.     }

  2452. 

  2453.     /* sanity check */

  2454.     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

  2455.         av_log(NULL, AV_LOG_ERROR, "swScaler: %dx%d -> %dx%d is invalid scaling dimension\n",

  2456.                srcW, srcH, dstW, dstH);

  2457.         return NULL;

  2458.     }

  2459.     if(srcW > VOFW || dstW > VOFW) {

  2460.         av_log(NULL, AV_LOG_ERROR, "swScaler: Compile-time maximum width is "AV_STRINGIFY(VOFW)" change VOF/VOFW and recompile\n");

  2461.         return NULL;

  2462.     }

  2463. 

  2464.     if (!dstFilter) dstFilter= &dummyFilter;

  2465.     if (!srcFilter) srcFilter= &dummyFilter;

  2466. 

  2467.     FF_ALLOCZ_OR_GOTO(NULL, c, sizeof(SwsContext), fail);

  2468. 

  2469.     c->av_class = &sws_context_class;

  2470.     c->srcW= srcW;

  2471.     c->srcH= srcH;

  2472.     c->dstW= dstW;

  2473.     c->dstH= dstH;

  2474.     c->lumXInc= ((srcW<<16) + (dstW>>1))/dstW;

  2475.     c->lumYInc= ((srcH<<16) + (dstH>>1))/dstH;

  2476.     c->flags= flags;

  2477.     c->dstFormat= dstFormat;

  2478.     c->srcFormat= srcFormat;

  2479.     c->vRounder= 4* 0x0001000100010001ULL;

  2480. 

  2481.     usesHFilter= usesVFilter= 0;

  2482.     if (dstFilter->lumV && dstFilter->lumV->length>1) usesVFilter=1;

  2483.     if (dstFilter->lumH && dstFilter->lumH->length>1) usesHFilter=1;

  2484.     if (dstFilter->chrV && dstFilter->chrV->length>1) usesVFilter=1;

  2485.     if (dstFilter->chrH && dstFilter->chrH->length>1) usesHFilter=1;

  2486.     if (srcFilter->lumV && srcFilter->lumV->length>1) usesVFilter=1;

  2487.     if (srcFilter->lumH && srcFilter->lumH->length>1) usesHFilter=1;

  2488.     if (srcFilter->chrV && srcFilter->chrV->length>1) usesVFilter=1;

  2489.     if (srcFilter->chrH && srcFilter->chrH->length>1) usesHFilter=1;

  2490. 

  2491.     getSubSampleFactors(&c->chrSrcHSubSample, &c->chrSrcVSubSample, srcFormat);

  2492.     getSubSampleFactors(&c->chrDstHSubSample, &c->chrDstVSubSample, dstFormat);

  2493. 

  2494.     // reuse chroma for 2 pixels RGB/BGR unless user wants full chroma interpolation

  2495.     if ((isBGR(dstFormat) || isRGB(dstFormat)) && !(flags&SWS_FULL_CHR_H_INT)) c->chrDstHSubSample=1;

  2496. 

  2497.     // drop some chroma lines if the user wants it

  2498.     c->vChrDrop= (flags&SWS_SRC_V_CHR_DROP_MASK)>>SWS_SRC_V_CHR_DROP_SHIFT;

  2499.     c->chrSrcVSubSample+= c->vChrDrop;

  2500. 

  2501.     // drop every other pixel for chroma calculation unless user wants full chroma

  2502.     if ((isBGR(srcFormat) || isRGB(srcFormat)) && !(flags&SWS_FULL_CHR_H_INP)

  2503.       && srcFormat!=PIX_FMT_RGB8      && srcFormat!=PIX_FMT_BGR8

  2504.       && srcFormat!=PIX_FMT_RGB4      && srcFormat!=PIX_FMT_BGR4

  2505.       && srcFormat!=PIX_FMT_RGB4_BYTE && srcFormat!=PIX_FMT_BGR4_BYTE

  2506.       && ((dstW>>c->chrDstHSubSample) <= (srcW>>1) || (flags&(SWS_FAST_BILINEAR|SWS_POINT))))

  2507.         c->chrSrcHSubSample=1;

  2508. 

  2509.     if (param) {

  2510.         c->param[0] = param[0];

  2511.         c->param[1] = param[1];

  2512.     } else {

  2513.         c->param[0] =

  2514.         c->param[1] = SWS_PARAM_DEFAULT;

  2515.     }

  2516. 

  2517.     // Note the -((-x)>>y) is so that we always round toward +inf.

  2518.     c->chrSrcW= -((-srcW) >> c->chrSrcHSubSample);

  2519.     c->chrSrcH= -((-srcH) >> c->chrSrcVSubSample);

  2520.     c->chrDstW= -((-dstW) >> c->chrDstHSubSample);

  2521.     c->chrDstH= -((-dstH) >> c->chrDstVSubSample);

  2522. 

  2523.     sws_setColorspaceDetails(c, ff_yuv2rgb_coeffs[SWS_CS_DEFAULT], srcRange, ff_yuv2rgb_coeffs[SWS_CS_DEFAULT] /* FIXME*/, dstRange, 0, 1<<16, 1<<16);

  2524. 

  2525.     /* unscaled special cases */

  2526.     if (unscaled && !usesHFilter && !usesVFilter && (srcRange == dstRange || isBGR(dstFormat) || isRGB(dstFormat))) {

  2527.         /* yv12_to_nv12 */

  2528.         if ((srcFormat == PIX_FMT_YUV420P || srcFormat == PIX_FMT_YUVA420P) && (dstFormat == PIX_FMT_NV12 || dstFormat == PIX_FMT_NV21)) {

  2529.             c->swScale= PlanarToNV12Wrapper;

  2530.         }

  2531.         /* yuv2bgr */

  2532.         if ((srcFormat==PIX_FMT_YUV420P || srcFormat==PIX_FMT_YUV422P || srcFormat==PIX_FMT_YUVA420P) && (isBGR(dstFormat) || isRGB(dstFormat))

  2533.             && !(flags & SWS_ACCURATE_RND) && !(dstH&1)) {

  2534.             c->swScale= ff_yuv2rgb_get_func_ptr(c);

  2535.         }

  2536. 

  2537.         if (srcFormat==PIX_FMT_YUV410P && (dstFormat==PIX_FMT_YUV420P || dstFormat==PIX_FMT_YUVA420P) && !(flags & SWS_BITEXACT)) {

  2538.             c->swScale= yvu9toyv12Wrapper;

  2539.         }

  2540. 

  2541.         /* bgr24toYV12 */

  2542.         if (srcFormat==PIX_FMT_BGR24 && (dstFormat==PIX_FMT_YUV420P || dstFormat==PIX_FMT_YUVA420P) && !(flags & SWS_ACCURATE_RND))

  2543.             c->swScale= bgr24toyv12Wrapper;

  2544. 

  2545.         /* RGB/BGR -> RGB/BGR (no dither needed forms) */

  2546.         if (  (isBGR(srcFormat) || isRGB(srcFormat))

  2547.            && (isBGR(dstFormat) || isRGB(dstFormat))

  2548.            && srcFormat != PIX_FMT_BGR8      && dstFormat != PIX_FMT_BGR8

  2549.            && srcFormat != PIX_FMT_RGB8      && dstFormat != PIX_FMT_RGB8

  2550.            && srcFormat != PIX_FMT_BGR4      && dstFormat != PIX_FMT_BGR4

  2551.            && srcFormat != PIX_FMT_RGB4      && dstFormat != PIX_FMT_RGB4

  2552.            && srcFormat != PIX_FMT_BGR4_BYTE && dstFormat != PIX_FMT_BGR4_BYTE

  2553.            && srcFormat != PIX_FMT_RGB4_BYTE && dstFormat != PIX_FMT_RGB4_BYTE

  2554.            && srcFormat != PIX_FMT_MONOBLACK && dstFormat != PIX_FMT_MONOBLACK

  2555.            && srcFormat != PIX_FMT_MONOWHITE && dstFormat != PIX_FMT_MONOWHITE

  2556.                                              && dstFormat != PIX_FMT_RGB32_1

  2557.                                              && dstFormat != PIX_FMT_BGR32_1

  2558.            && srcFormat != PIX_FMT_RGB48LE   && dstFormat != PIX_FMT_RGB48LE

  2559.            && srcFormat != PIX_FMT_RGB48BE   && dstFormat != PIX_FMT_RGB48BE

  2560.            && (!needsDither || (c->flags&(SWS_FAST_BILINEAR|SWS_POINT))))

  2561.              c->swScale= rgb2rgbWrapper;

  2562. 

  2563.         if ((usePal(srcFormat) && (

  2564.                  dstFormat == PIX_FMT_RGB32   ||

  2565.                  dstFormat == PIX_FMT_RGB32_1 ||

  2566.                  dstFormat == PIX_FMT_RGB24   ||

  2567.                  dstFormat == PIX_FMT_BGR32   ||

  2568.                  dstFormat == PIX_FMT_BGR32_1 ||

  2569.                  dstFormat == PIX_FMT_BGR24)))

  2570.              c->swScale= pal2rgbWrapper;

  2571. 

  2572.         if (srcFormat == PIX_FMT_YUV422P) {

  2573.             if (dstFormat == PIX_FMT_YUYV422)

  2574.                 c->swScale= YUV422PToYuy2Wrapper;

  2575.             else if (dstFormat == PIX_FMT_UYVY422)

  2576.                 c->swScale= YUV422PToUyvyWrapper;

  2577.         }

  2578. 

  2579.         /* LQ converters if -sws 0 or -sws 4*/

  2580.         if (c->flags&(SWS_FAST_BILINEAR|SWS_POINT)) {

  2581.             /* yv12_to_yuy2 */

  2582.             if (srcFormat == PIX_FMT_YUV420P || srcFormat == PIX_FMT_YUVA420P) {

  2583.                 if (dstFormat == PIX_FMT_YUYV422)

  2584.                     c->swScale= PlanarToYuy2Wrapper;

  2585.                 else if (dstFormat == PIX_FMT_UYVY422)

  2586.                     c->swScale= PlanarToUyvyWrapper;

  2587.             }

  2588.         }

  2589.         if(srcFormat == PIX_FMT_YUYV422 && (dstFormat == PIX_FMT_YUV420P || dstFormat == PIX_FMT_YUVA420P))

  2590.             c->swScale= YUYV2YUV420Wrapper;

  2591.         if(srcFormat == PIX_FMT_UYVY422 && (dstFormat == PIX_FMT_YUV420P || dstFormat == PIX_FMT_YUVA420P))

  2592.             c->swScale= UYVY2YUV420Wrapper;

  2593.         if(srcFormat == PIX_FMT_YUYV422 && dstFormat == PIX_FMT_YUV422P)

  2594.             c->swScale= YUYV2YUV422Wrapper;

  2595.         if(srcFormat == PIX_FMT_UYVY422 && dstFormat == PIX_FMT_YUV422P)

  2596.             c->swScale= UYVY2YUV422Wrapper;

  2597. 

  2598. #ifdef COMPILE_ALTIVEC

  2599.         if ((c->flags & SWS_CPU_CAPS_ALTIVEC) &&

  2600.             !(c->flags & SWS_BITEXACT) &&

  2601.             srcFormat == PIX_FMT_YUV420P) {

  2602.           // unscaled YV12 -> packed YUV, we want speed

  2603.           if (dstFormat == PIX_FMT_YUYV422)

  2604.               c->swScale= yv12toyuy2_unscaled_altivec;

  2605.           else if (dstFormat == PIX_FMT_UYVY422)

  2606.               c->swScale= yv12touyvy_unscaled_altivec;

  2607.         }

  2608. #endif

  2609. 

  2610.         /* simple copy */

  2611.         if (  srcFormat == dstFormat

  2612.             || (srcFormat == PIX_FMT_YUVA420P && dstFormat == PIX_FMT_YUV420P)

  2613.             || (srcFormat == PIX_FMT_YUV420P && dstFormat == PIX_FMT_YUVA420P)

  2614.             || (isPlanarYUV(srcFormat) && isGray(dstFormat))

  2615.             || (isPlanarYUV(dstFormat) && isGray(srcFormat))

  2616.             || (isGray(dstFormat) && isGray(srcFormat))

  2617.             || (isPlanarYUV(srcFormat) && isPlanarYUV(dstFormat)

  2618.                 && c->chrDstHSubSample == c->chrSrcHSubSample

  2619.                 && c->chrDstVSubSample == c->chrSrcVSubSample

  2620.                 && dstFormat != PIX_FMT_NV12 && dstFormat != PIX_FMT_NV21

  2621.                 && srcFormat != PIX_FMT_NV12 && srcFormat != PIX_FMT_NV21))

  2622.         {

  2623.             if (isPacked(c->srcFormat))

  2624.                 c->swScale= packedCopy;

  2625.             else /* Planar YUV or gray */

  2626.                 c->swScale= planarCopy;

  2627.         }

  2628. #if ARCH_BFIN

  2629.         if (flags & SWS_CPU_CAPS_BFIN)

  2630.             ff_bfin_get_unscaled_swscale (c);

  2631. #endif

  2632. 

  2633.         if (c->swScale) {

  2634.             if (flags&SWS_PRINT_INFO)

  2635.                 av_log(c, AV_LOG_INFO, "using unscaled %s -> %s special converter\n",

  2636.                        sws_format_name(srcFormat), sws_format_name(dstFormat));

  2637.             return c;

  2638.         }

  2639.     }

  2640. 

  2641.     if (flags & SWS_CPU_CAPS_MMX2) {

  2642.         c->canMMX2BeUsed= (dstW >=srcW && (dstW&31)==0 && (srcW&15)==0) ? 1 : 0;

  2643.         if (!c->canMMX2BeUsed && dstW >=srcW && (srcW&15)==0 && (flags&SWS_FAST_BILINEAR)) {

  2644.             if (flags&SWS_PRINT_INFO)

  2645.                 av_log(c, AV_LOG_INFO, "output width is not a multiple of 32 -> no MMX2 scaler\n");

  2646.         }

  2647.         if (usesHFilter) c->canMMX2BeUsed=0;

  2648.     }

  2649.     else

  2650.         c->canMMX2BeUsed=0;

  2651. 

  2652.     c->chrXInc= ((c->chrSrcW<<16) + (c->chrDstW>>1))/c->chrDstW;

  2653.     c->chrYInc= ((c->chrSrcH<<16) + (c->chrDstH>>1))/c->chrDstH;

  2654. 

  2655.     // match pixel 0 of the src to pixel 0 of dst and match pixel n-2 of src to pixel n-2 of dst

  2656.     // but only for the FAST_BILINEAR mode otherwise do correct scaling

  2657.     // n-2 is the last chrominance sample available

  2658.     // this is not perfect, but no one should notice the difference, the more correct variant

  2659.     // would be like the vertical one, but that would require some special code for the

  2660.     // first and last pixel

  2661.     if (flags&SWS_FAST_BILINEAR) {

  2662.         if (c->canMMX2BeUsed) {

  2663.             c->lumXInc+= 20;

  2664.             c->chrXInc+= 20;

  2665.         }

  2666.         //we don't use the x86 asm scaler if MMX is available

  2667.         else if (flags & SWS_CPU_CAPS_MMX) {

  2668.             c->lumXInc = ((srcW-2)<<16)/(dstW-2) - 20;

  2669.             c->chrXInc = ((c->chrSrcW-2)<<16)/(c->chrDstW-2) - 20;

  2670.         }

  2671.     }

  2672. 

  2673.     /* precalculate horizontal scaler filter coefficients */

  2674.     {

  2675.         const int filterAlign=

  2676.             (flags & SWS_CPU_CAPS_MMX) ? 4 :

  2677.             (flags & SWS_CPU_CAPS_ALTIVEC) ? 8 :

  2678.             1;

  2679. 

  2680.         if (initFilter(&c->hLumFilter, &c->hLumFilterPos, &c->hLumFilterSize, c->lumXInc,

  2681.                        srcW      ,       dstW, filterAlign, 1<<14,

  2682.                        (flags&SWS_BICUBLIN) ? (flags|SWS_BICUBIC)  : flags,

  2683.                        srcFilter->lumH, dstFilter->lumH, c->param) < 0)

  2684.             goto fail;

  2685.         if (initFilter(&c->hChrFilter, &c->hChrFilterPos, &c->hChrFilterSize, c->chrXInc,

  2686.                        c->chrSrcW, c->chrDstW, filterAlign, 1<<14,

  2687.                        (flags&SWS_BICUBLIN) ? (flags|SWS_BILINEAR) : flags,

  2688.                        srcFilter->chrH, dstFilter->chrH, c->param) < 0)

  2689.             goto fail;

  2690. 

  2691. #if defined(COMPILE_MMX2)

  2692. // can't downscale !!!

  2693.         if (c->canMMX2BeUsed && (flags & SWS_FAST_BILINEAR)) {

  2694.             c->lumMmx2FilterCodeSize = initMMX2HScaler(      dstW, c->lumXInc, NULL, NULL, NULL, 8);

  2695.             c->chrMmx2FilterCodeSize = initMMX2HScaler(c->chrDstW, c->chrXInc, NULL, NULL, NULL, 4);

  2696. 

  2697. #ifdef MAP_ANONYMOUS

  2698.             c->lumMmx2FilterCode = mmap(NULL, c->lumMmx2FilterCodeSize, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, 0, 0);

  2699.             c->chrMmx2FilterCode = mmap(NULL, c->chrMmx2FilterCodeSize, PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, 0, 0);

  2700. #elif HAVE_VIRTUALALLOC

  2701.             c->lumMmx2FilterCode = VirtualAlloc(NULL, c->lumMmx2FilterCodeSize, MEM_COMMIT, PAGE_EXECUTE_READWRITE);

  2702.             c->chrMmx2FilterCode = VirtualAlloc(NULL, c->chrMmx2FilterCodeSize, MEM_COMMIT, PAGE_EXECUTE_READWRITE);

  2703. #else

  2704.             c->lumMmx2FilterCode = av_malloc(c->lumMmx2FilterCodeSize);

  2705.             c->chrMmx2FilterCode = av_malloc(c->chrMmx2FilterCodeSize);

  2706. #endif

  2707. 

  2708.             FF_ALLOCZ_OR_GOTO(c, c->lumMmx2Filter   , (dstW        /8+8)*sizeof(int16_t), fail);

  2709.             FF_ALLOCZ_OR_GOTO(c, c->chrMmx2Filter   , (c->chrDstW  /4+8)*sizeof(int16_t), fail);

  2710.             FF_ALLOCZ_OR_GOTO(c, c->lumMmx2FilterPos, (dstW      /2/8+8)*sizeof(int32_t), fail);

  2711.             FF_ALLOCZ_OR_GOTO(c, c->chrMmx2FilterPos, (c->chrDstW/2/4+8)*sizeof(int32_t), fail);

  2712. 

  2713.             initMMX2HScaler(      dstW, c->lumXInc, c->lumMmx2FilterCode, c->lumMmx2Filter, c->lumMmx2FilterPos, 8);

  2714.             initMMX2HScaler(c->chrDstW, c->chrXInc, c->chrMmx2FilterCode, c->chrMmx2Filter, c->chrMmx2FilterPos, 4);

  2715. 

  2716. #ifdef MAP_ANONYMOUS

  2717.             mprotect(c->lumMmx2FilterCode, c->lumMmx2FilterCodeSize, PROT_EXEC | PROT_READ);

  2718.             mprotect(c->chrMmx2FilterCode, c->chrMmx2FilterCodeSize, PROT_EXEC | PROT_READ);

  2719. #endif

  2720.         }

  2721. #endif /* defined(COMPILE_MMX2) */

  2722.     } // initialize horizontal stuff

  2723. 

  2724. 

  2725. 

  2726.     /* precalculate vertical scaler filter coefficients */

  2727.     {

  2728.         const int filterAlign=

  2729.             (flags & SWS_CPU_CAPS_MMX) && (flags & SWS_ACCURATE_RND) ? 2 :

  2730.             (flags & SWS_CPU_CAPS_ALTIVEC) ? 8 :

  2731.             1;

  2732. 

  2733.         if (initFilter(&c->vLumFilter, &c->vLumFilterPos, &c->vLumFilterSize, c->lumYInc,

  2734.                        srcH      ,        dstH, filterAlign, (1<<12),

  2735.                        (flags&SWS_BICUBLIN) ? (flags|SWS_BICUBIC)  : flags,

  2736.                        srcFilter->lumV, dstFilter->lumV, c->param) < 0)

  2737.             goto fail;

  2738.         if (initFilter(&c->vChrFilter, &c->vChrFilterPos, &c->vChrFilterSize, c->chrYInc,

  2739.                        c->chrSrcH, c->chrDstH, filterAlign, (1<<12),

  2740.                        (flags&SWS_BICUBLIN) ? (flags|SWS_BILINEAR) : flags,

  2741.                        srcFilter->chrV, dstFilter->chrV, c->param) < 0)

  2742.             goto fail;

  2743. 

  2744. #ifdef COMPILE_ALTIVEC

  2745.         FF_ALLOC_OR_GOTO(c, c->vYCoeffsBank, sizeof (vector signed short)*c->vLumFilterSize*c->dstH, fail);

  2746.         FF_ALLOC_OR_GOTO(c, c->vCCoeffsBank, sizeof (vector signed short)*c->vChrFilterSize*c->chrDstH, fail);

  2747. 

  2748.         for (i=0;i<c->vLumFilterSize*c->dstH;i++) {

  2749.             int j;

  2750.             short *p = (short *)&c->vYCoeffsBank[i];

  2751.             for (j=0;j<8;j++)

  2752.                 p[j] = c->vLumFilter[i];

  2753.         }

  2754. 

  2755.         for (i=0;i<c->vChrFilterSize*c->chrDstH;i++) {

  2756.             int j;

  2757.             short *p = (short *)&c->vCCoeffsBank[i];

  2758.             for (j=0;j<8;j++)

  2759.                 p[j] = c->vChrFilter[i];

  2760.         }

  2761. #endif

  2762.     }

  2763. 

  2764.     // calculate buffer sizes so that they won't run out while handling these damn slices

  2765.     c->vLumBufSize= c->vLumFilterSize;

  2766.     c->vChrBufSize= c->vChrFilterSize;

  2767.     for (i=0; i<dstH; i++) {

  2768.         int chrI= i*c->chrDstH / dstH;

  2769.         int nextSlice= FFMAX(c->vLumFilterPos[i   ] + c->vLumFilterSize - 1,

  2770.                            ((c->vChrFilterPos[chrI] + c->vChrFilterSize - 1)<<c->chrSrcVSubSample));

  2771. 

  2772.         nextSlice>>= c->chrSrcVSubSample;

  2773.         nextSlice<<= c->chrSrcVSubSample;

  2774.         if (c->vLumFilterPos[i   ] + c->vLumBufSize < nextSlice)

  2775.             c->vLumBufSize= nextSlice - c->vLumFilterPos[i];

  2776.         if (c->vChrFilterPos[chrI] + c->vChrBufSize < (nextSlice>>c->chrSrcVSubSample))

  2777.             c->vChrBufSize= (nextSlice>>c->chrSrcVSubSample) - c->vChrFilterPos[chrI];

  2778.     }

  2779. 

  2780.     // allocate pixbufs (we use dynamic allocation because otherwise we would need to

  2781.     // allocate several megabytes to handle all possible cases)

  2782.     FF_ALLOC_OR_GOTO(c, c->lumPixBuf, c->vLumBufSize*2*sizeof(int16_t*), fail);

  2783.     FF_ALLOC_OR_GOTO(c, c->chrPixBuf, c->vChrBufSize*2*sizeof(int16_t*), fail);

  2784.     if (CONFIG_SWSCALE_ALPHA && isALPHA(c->srcFormat) && isALPHA(c->dstFormat))

  2785.         FF_ALLOCZ_OR_GOTO(c, c->alpPixBuf, c->vLumBufSize*2*sizeof(int16_t*), fail);

  2786.     //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)

  2787.     /* align at 16 bytes for AltiVec */

  2788.     for (i=0; i<c->vLumBufSize; i++) {

  2789.         FF_ALLOCZ_OR_GOTO(c, c->lumPixBuf[i+c->vLumBufSize], VOF+1, fail);

  2790.         c->lumPixBuf[i] = c->lumPixBuf[i+c->vLumBufSize];

  2791.     }

  2792.     for (i=0; i<c->vChrBufSize; i++) {

  2793.         FF_ALLOC_OR_GOTO(c, c->chrPixBuf[i+c->vChrBufSize], (VOF+1)*2, fail);

  2794.         c->chrPixBuf[i] = c->chrPixBuf[i+c->vChrBufSize];

  2795.     }

  2796.     if (CONFIG_SWSCALE_ALPHA && c->alpPixBuf)

  2797.         for (i=0; i<c->vLumBufSize; i++) {

  2798.             FF_ALLOCZ_OR_GOTO(c, c->alpPixBuf[i+c->vLumBufSize], VOF+1, fail);

  2799.             c->alpPixBuf[i] = c->alpPixBuf[i+c->vLumBufSize];

  2800.         }

  2801. 

  2802.     //try to avoid drawing green stuff between the right end and the stride end

  2803.     for (i=0; i<c->vChrBufSize; i++) memset(c->chrPixBuf[i], 64, (VOF+1)*2);

  2804. 

  2805.     assert(2*VOFW == VOF);

  2806. 

  2807.     assert(c->chrDstH <= dstH);

  2808. 

  2809.     if (flags&SWS_PRINT_INFO) {

  2810. #ifdef DITHER1XBPP

  2811.         const char *dither= " dithered";

  2812. #else

  2813.         const char *dither= "";

  2814. #endif

  2815.         if (flags&SWS_FAST_BILINEAR)

  2816.             av_log(c, AV_LOG_INFO, "FAST_BILINEAR scaler, ");

  2817.         else if (flags&SWS_BILINEAR)

  2818.             av_log(c, AV_LOG_INFO, "BILINEAR scaler, ");

  2819.         else if (flags&SWS_BICUBIC)

  2820.             av_log(c, AV_LOG_INFO, "BICUBIC scaler, ");

  2821.         else if (flags&SWS_X)

  2822.             av_log(c, AV_LOG_INFO, "Experimental scaler, ");

  2823.         else if (flags&SWS_POINT)

  2824.             av_log(c, AV_LOG_INFO, "Nearest Neighbor / POINT scaler, ");

  2825.         else if (flags&SWS_AREA)

  2826.             av_log(c, AV_LOG_INFO, "Area Averageing scaler, ");

  2827.         else if (flags&SWS_BICUBLIN)

  2828.             av_log(c, AV_LOG_INFO, "luma BICUBIC / chroma BILINEAR scaler, ");

  2829.         else if (flags&SWS_GAUSS)

  2830.             av_log(c, AV_LOG_INFO, "Gaussian scaler, ");

  2831.         else if (flags&SWS_SINC)

  2832.             av_log(c, AV_LOG_INFO, "Sinc scaler, ");

  2833.         else if (flags&SWS_LANCZOS)

  2834.             av_log(c, AV_LOG_INFO, "Lanczos scaler, ");

  2835.         else if (flags&SWS_SPLINE)

  2836.             av_log(c, AV_LOG_INFO, "Bicubic spline scaler, ");

  2837.         else

  2838.             av_log(c, AV_LOG_INFO, "ehh flags invalid?! ");

  2839. 

  2840.         if (dstFormat==PIX_FMT_BGR555 || dstFormat==PIX_FMT_BGR565)

  2841.             av_log(c, AV_LOG_INFO, "from %s to%s %s ",

  2842.                    sws_format_name(srcFormat), dither, sws_format_name(dstFormat));

  2843.         else

  2844.             av_log(c, AV_LOG_INFO, "from %s to %s ",

  2845.                    sws_format_name(srcFormat), sws_format_name(dstFormat));

  2846. 

  2847.         if (flags & SWS_CPU_CAPS_MMX2)

  2848.             av_log(c, AV_LOG_INFO, "using MMX2\n");

  2849.         else if (flags & SWS_CPU_CAPS_3DNOW)

  2850.             av_log(c, AV_LOG_INFO, "using 3DNOW\n");

  2851.         else if (flags & SWS_CPU_CAPS_MMX)

  2852.             av_log(c, AV_LOG_INFO, "using MMX\n");

  2853.         else if (flags & SWS_CPU_CAPS_ALTIVEC)

  2854.             av_log(c, AV_LOG_INFO, "using AltiVec\n");

  2855.         else

  2856.             av_log(c, AV_LOG_INFO, "using C\n");

  2857.     }

  2858. 

  2859.     if (flags & SWS_PRINT_INFO) {

  2860.         if (flags & SWS_CPU_CAPS_MMX) {

  2861.             if (c->canMMX2BeUsed && (flags&SWS_FAST_BILINEAR))

  2862.                 av_log(c, AV_LOG_VERBOSE, "using FAST_BILINEAR MMX2 scaler for horizontal scaling\n");

  2863.             else {

  2864.                 if (c->hLumFilterSize==4)

  2865.                     av_log(c, AV_LOG_VERBOSE, "using 4-tap MMX scaler for horizontal luminance scaling\n");

  2866.                 else if (c->hLumFilterSize==8)

  2867.                     av_log(c, AV_LOG_VERBOSE, "using 8-tap MMX scaler for horizontal luminance scaling\n");

  2868.                 else

  2869.                     av_log(c, AV_LOG_VERBOSE, "using n-tap MMX scaler for horizontal luminance scaling\n");

  2870. 

  2871.                 if (c->hChrFilterSize==4)

  2872.                     av_log(c, AV_LOG_VERBOSE, "using 4-tap MMX scaler for horizontal chrominance scaling\n");

  2873.                 else if (c->hChrFilterSize==8)

  2874.                     av_log(c, AV_LOG_VERBOSE, "using 8-tap MMX scaler for horizontal chrominance scaling\n");

  2875.                 else

  2876.                     av_log(c, AV_LOG_VERBOSE, "using n-tap MMX scaler for horizontal chrominance scaling\n");

  2877.             }

  2878.         } else {

  2879. #if ARCH_X86

  2880.             av_log(c, AV_LOG_VERBOSE, "using x86 asm scaler for horizontal scaling\n");

  2881. #else

  2882.             if (flags & SWS_FAST_BILINEAR)

  2883.                 av_log(c, AV_LOG_VERBOSE, "using FAST_BILINEAR C scaler for horizontal scaling\n");

  2884.             else

  2885.                 av_log(c, AV_LOG_VERBOSE, "using C scaler for horizontal scaling\n");

  2886. #endif

  2887.         }

  2888.         if (isPlanarYUV(dstFormat)) {

  2889.             if (c->vLumFilterSize==1)

  2890.                 av_log(c, AV_LOG_VERBOSE, "using 1-tap %s \"scaler\" for vertical scaling (YV12 like)\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");

  2891.             else

  2892.                 av_log(c, AV_LOG_VERBOSE, "using n-tap %s scaler for vertical scaling (YV12 like)\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");

  2893.         } else {

  2894.             if (c->vLumFilterSize==1 && c->vChrFilterSize==2)

  2895.                 av_log(c, AV_LOG_VERBOSE, "using 1-tap %s \"scaler\" for vertical luminance scaling (BGR)\n"

  2896.                        "      2-tap scaler for vertical chrominance scaling (BGR)\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");

  2897.             else if (c->vLumFilterSize==2 && c->vChrFilterSize==2)

  2898.                 av_log(c, AV_LOG_VERBOSE, "using 2-tap linear %s scaler for vertical scaling (BGR)\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");

  2899.             else

  2900.                 av_log(c, AV_LOG_VERBOSE, "using n-tap %s scaler for vertical scaling (BGR)\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");

  2901.         }

  2902. 

  2903.         if (dstFormat==PIX_FMT_BGR24)

  2904.             av_log(c, AV_LOG_VERBOSE, "using %s YV12->BGR24 converter\n",

  2905.                    (flags & SWS_CPU_CAPS_MMX2) ? "MMX2" : ((flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C"));

  2906.         else if (dstFormat==PIX_FMT_RGB32)

  2907.             av_log(c, AV_LOG_VERBOSE, "using %s YV12->BGR32 converter\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");

  2908.         else if (dstFormat==PIX_FMT_BGR565)

  2909.             av_log(c, AV_LOG_VERBOSE, "using %s YV12->BGR16 converter\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");

  2910.         else if (dstFormat==PIX_FMT_BGR555)

  2911.             av_log(c, AV_LOG_VERBOSE, "using %s YV12->BGR15 converter\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");

  2912. 

  2913.         av_log(c, AV_LOG_VERBOSE, "%dx%d -> %dx%d\n", srcW, srcH, dstW, dstH);

  2914.     }

  2915.     if (flags & SWS_PRINT_INFO) {

  2916.         av_log(c, AV_LOG_DEBUG, "lum srcW=%d srcH=%d dstW=%d dstH=%d xInc=%d yInc=%d\n",

  2917.                c->srcW, c->srcH, c->dstW, c->dstH, c->lumXInc, c->lumYInc);

  2918.         av_log(c, AV_LOG_DEBUG, "chr srcW=%d srcH=%d dstW=%d dstH=%d xInc=%d yInc=%d\n",

  2919.                c->chrSrcW, c->chrSrcH, c->chrDstW, c->chrDstH, c->chrXInc, c->chrYInc);

  2920.     }

  2921. 

  2922.     c->swScale= getSwsFunc(c);

  2923.     return c;

  2924. 

  2925. fail:

  2926.     sws_freeContext(c);

  2927.     return NULL;

  2928. }

  2929. 

  2930. static void reset_ptr(uint8_t* src[], int format)

  2931. {

  2932.     if(!isALPHA(format))

  2933.         src[3]=NULL;

  2934.     if(!isPlanarYUV(format)) {

  2935.         src[3]=src[2]=NULL;

  2936.         if(   format != PIX_FMT_PAL8

  2937.            && format != PIX_FMT_RGB8

  2938.            && format != PIX_FMT_BGR8

  2939.            && format != PIX_FMT_RGB4_BYTE

  2940.            && format != PIX_FMT_BGR4_BYTE

  2941.           )

  2942.             src[1]= NULL;

  2943.     }

  2944. }

  2945. 

  2946. /**

  2947.  * swscale wrapper, so we don't need to export the SwsContext.

  2948.  * Assumes planar YUV to be in YUV order instead of YVU.

  2949.  */

  2950. int sws_scale(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  2951.               int srcSliceH, uint8_t* dst[], int dstStride[])

  2952. {

  2953.     int i;

  2954.     uint8_t* src2[4]= {src[0], src[1], src[2], src[3]};

  2955.     uint8_t* dst2[4]= {dst[0], dst[1], dst[2], dst[3]};

  2956. 

  2957.     if (c->sliceDir == 0 && srcSliceY != 0 && srcSliceY + srcSliceH != c->srcH) {

  2958.         av_log(c, AV_LOG_ERROR, "Slices start in the middle!\n");

  2959.         return 0;

  2960.     }

  2961.     if (c->sliceDir == 0) {

  2962.         if (srcSliceY == 0) c->sliceDir = 1; else c->sliceDir = -1;

  2963.     }

  2964. 

  2965.     if (usePal(c->srcFormat)) {

  2966.         for (i=0; i<256; i++) {

  2967.             int p, r, g, b,y,u,v;

  2968.             if(c->srcFormat == PIX_FMT_PAL8) {

  2969.                 p=((uint32_t*)(src[1]))[i];

  2970.                 r= (p>>16)&0xFF;

  2971.                 g= (p>> 8)&0xFF;

  2972.                 b=  p     &0xFF;

  2973.             } else if(c->srcFormat == PIX_FMT_RGB8) {

  2974.                 r= (i>>5    )*36;

  2975.                 g= ((i>>2)&7)*36;

  2976.                 b= (i&3     )*85;

  2977.             } else if(c->srcFormat == PIX_FMT_BGR8) {

  2978.                 b= (i>>6    )*85;

  2979.                 g= ((i>>3)&7)*36;

  2980.                 r= (i&7     )*36;

  2981.             } else if(c->srcFormat == PIX_FMT_RGB4_BYTE) {

  2982.                 r= (i>>3    )*255;

  2983.                 g= ((i>>1)&3)*85;

  2984.                 b= (i&1     )*255;

  2985.             } else {

  2986.                 assert(c->srcFormat == PIX_FMT_BGR4_BYTE);

  2987.                 b= (i>>3    )*255;

  2988.                 g= ((i>>1)&3)*85;

  2989.                 r= (i&1     )*255;

  2990.             }

  2991.             y= av_clip_uint8((RY*r + GY*g + BY*b + ( 33<<(RGB2YUV_SHIFT-1)))>>RGB2YUV_SHIFT);

  2992.             u= av_clip_uint8((RU*r + GU*g + BU*b + (257<<(RGB2YUV_SHIFT-1)))>>RGB2YUV_SHIFT);

  2993.             v= av_clip_uint8((RV*r + GV*g + BV*b + (257<<(RGB2YUV_SHIFT-1)))>>RGB2YUV_SHIFT);

  2994.             c->pal_yuv[i]= y + (u<<8) + (v<<16);

  2995. 

  2996. 

  2997.             switch(c->dstFormat) {

  2998.             case PIX_FMT_BGR32:

  2999. #if !HAVE_BIGENDIAN

  3000.             case PIX_FMT_RGB24:

  3001. #endif

  3002.                 c->pal_rgb[i]=  r + (g<<8) + (b<<16);

  3003.                 break;

  3004.             case PIX_FMT_BGR32_1:

  3005. #if HAVE_BIGENDIAN

  3006.             case PIX_FMT_BGR24:

  3007. #endif

  3008.                 c->pal_rgb[i]= (r + (g<<8) + (b<<16)) << 8;

  3009.                 break;

  3010.             case PIX_FMT_RGB32_1:

  3011. #if HAVE_BIGENDIAN

  3012.             case PIX_FMT_RGB24:

  3013. #endif

  3014.                 c->pal_rgb[i]= (b + (g<<8) + (r<<16)) << 8;

  3015.                 break;

  3016.             case PIX_FMT_RGB32:

  3017. #if !HAVE_BIGENDIAN

  3018.             case PIX_FMT_BGR24:

  3019. #endif

  3020.             default:

  3021.                 c->pal_rgb[i]=  b + (g<<8) + (r<<16);

  3022.             }

  3023.         }

  3024.     }

  3025. 

  3026.     // copy strides, so they can safely be modified

  3027.     if (c->sliceDir == 1) {

  3028.         // slices go from top to bottom

  3029.         int srcStride2[4]= {srcStride[0], srcStride[1], srcStride[2], srcStride[3]};

  3030.         int dstStride2[4]= {dstStride[0], dstStride[1], dstStride[2], dstStride[3]};

  3031. 

  3032.         reset_ptr(src2, c->srcFormat);

  3033.         reset_ptr(dst2, c->dstFormat);

  3034. 

  3035.         /* reset slice direction at end of frame */

  3036.         if (srcSliceY + srcSliceH == c->srcH)

  3037.             c->sliceDir = 0;

  3038. 

  3039.         return c->swScale(c, src2, srcStride2, srcSliceY, srcSliceH, dst2, dstStride2);

  3040.     } else {

  3041.         // slices go from bottom to top => we flip the image internally

  3042.         int srcStride2[4]= {-srcStride[0], -srcStride[1], -srcStride[2], -srcStride[3]};

  3043.         int dstStride2[4]= {-dstStride[0], -dstStride[1], -dstStride[2], -dstStride[3]};

  3044. 

  3045.         src2[0] += (srcSliceH-1)*srcStride[0];

  3046.         if (!usePal(c->srcFormat))

  3047.             src2[1] += ((srcSliceH>>c->chrSrcVSubSample)-1)*srcStride[1];

  3048.         src2[2] += ((srcSliceH>>c->chrSrcVSubSample)-1)*srcStride[2];

  3049.         src2[3] += (srcSliceH-1)*srcStride[3];

  3050.         dst2[0] += ( c->dstH                      -1)*dstStride[0];

  3051.         dst2[1] += ((c->dstH>>c->chrDstVSubSample)-1)*dstStride[1];

  3052.         dst2[2] += ((c->dstH>>c->chrDstVSubSample)-1)*dstStride[2];

  3053.         dst2[3] += ( c->dstH                      -1)*dstStride[3];

  3054. 

  3055.         reset_ptr(src2, c->srcFormat);

  3056.         reset_ptr(dst2, c->dstFormat);

  3057. 

  3058.         /* reset slice direction at end of frame */

  3059.         if (!srcSliceY)

  3060.             c->sliceDir = 0;

  3061. 

  3062.         return c->swScale(c, src2, srcStride2, c->srcH-srcSliceY-srcSliceH, srcSliceH, dst2, dstStride2);

  3063.     }

  3064. }

  3065. 

  3066. #if LIBSWSCALE_VERSION_MAJOR < 1

  3067. int sws_scale_ordered(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  3068.                       int srcSliceH, uint8_t* dst[], int dstStride[])

  3069. {

  3070.     return sws_scale(c, src, srcStride, srcSliceY, srcSliceH, dst, dstStride);

  3071. }

  3072. #endif

  3073. 

  3074. SwsFilter *sws_getDefaultFilter(float lumaGBlur, float chromaGBlur,

  3075.                                 float lumaSharpen, float chromaSharpen,

  3076.                                 float chromaHShift, float chromaVShift,

  3077.                                 int verbose)

  3078. {

  3079.     SwsFilter *filter= av_malloc(sizeof(SwsFilter));

  3080.     if (!filter)

  3081.         return NULL;

  3082. 

  3083.     if (lumaGBlur!=0.0) {

  3084.         filter->lumH= sws_getGaussianVec(lumaGBlur, 3.0);

  3085.         filter->lumV= sws_getGaussianVec(lumaGBlur, 3.0);

  3086.     } else {

  3087.         filter->lumH= sws_getIdentityVec();

  3088.         filter->lumV= sws_getIdentityVec();

  3089.     }

  3090. 

  3091.     if (chromaGBlur!=0.0) {

  3092.         filter->chrH= sws_getGaussianVec(chromaGBlur, 3.0);

  3093.         filter->chrV= sws_getGaussianVec(chromaGBlur, 3.0);

  3094.     } else {

  3095.         filter->chrH= sws_getIdentityVec();

  3096.         filter->chrV= sws_getIdentityVec();

  3097.     }

  3098. 

  3099.     if (chromaSharpen!=0.0) {

  3100.         SwsVector *id= sws_getIdentityVec();

  3101.         sws_scaleVec(filter->chrH, -chromaSharpen);

  3102.         sws_scaleVec(filter->chrV, -chromaSharpen);

  3103.         sws_addVec(filter->chrH, id);

  3104.         sws_addVec(filter->chrV, id);

  3105.         sws_freeVec(id);

  3106.     }

  3107. 

  3108.     if (lumaSharpen!=0.0) {

  3109.         SwsVector *id= sws_getIdentityVec();

  3110.         sws_scaleVec(filter->lumH, -lumaSharpen);

  3111.         sws_scaleVec(filter->lumV, -lumaSharpen);

  3112.         sws_addVec(filter->lumH, id);

  3113.         sws_addVec(filter->lumV, id);

  3114.         sws_freeVec(id);

  3115.     }

  3116. 

  3117.     if (chromaHShift != 0.0)

  3118.         sws_shiftVec(filter->chrH, (int)(chromaHShift+0.5));

  3119. 

  3120.     if (chromaVShift != 0.0)

  3121.         sws_shiftVec(filter->chrV, (int)(chromaVShift+0.5));

  3122. 

  3123.     sws_normalizeVec(filter->chrH, 1.0);

  3124.     sws_normalizeVec(filter->chrV, 1.0);

  3125.     sws_normalizeVec(filter->lumH, 1.0);

  3126.     sws_normalizeVec(filter->lumV, 1.0);

  3127. 

  3128.     if (verbose) sws_printVec2(filter->chrH, NULL, AV_LOG_DEBUG);

  3129.     if (verbose) sws_printVec2(filter->lumH, NULL, AV_LOG_DEBUG);

  3130. 

  3131.     return filter;

  3132. }

  3133. 

  3134. SwsVector *sws_allocVec(int length)

  3135. {

  3136.     SwsVector *vec = av_malloc(sizeof(SwsVector));

  3137.     if (!vec)

  3138.         return NULL;

  3139.     vec->length = length;

  3140.     vec->coeff  = av_malloc(sizeof(double) * length);

  3141.     if (!vec->coeff)

  3142.         av_freep(&vec);

  3143.     return vec;

  3144. }

  3145. 

  3146. SwsVector *sws_getGaussianVec(double variance, double quality)

  3147. {

  3148.     const int length= (int)(variance*quality + 0.5) | 1;

  3149.     int i;

  3150.     double middle= (length-1)*0.5;

  3151.     SwsVector *vec= sws_allocVec(length);

  3152. 

  3153.     if (!vec)

  3154.         return NULL;

  3155. 

  3156.     for (i=0; i<length; i++) {

  3157.         double dist= i-middle;

  3158.         vec->coeff[i]= exp(-dist*dist/(2*variance*variance)) / sqrt(2*variance*PI);

  3159.     }

  3160. 

  3161.     sws_normalizeVec(vec, 1.0);

  3162. 

  3163.     return vec;

  3164. }

  3165. 

  3166. SwsVector *sws_getConstVec(double c, int length)

  3167. {

  3168.     int i;

  3169.     SwsVector *vec= sws_allocVec(length);

  3170. 

  3171.     if (!vec)

  3172.         return NULL;

  3173. 

  3174.     for (i=0; i<length; i++)

  3175.         vec->coeff[i]= c;

  3176. 

  3177.     return vec;

  3178. }

  3179. 

  3180. 

  3181. SwsVector *sws_getIdentityVec(void)

  3182. {

  3183.     return sws_getConstVec(1.0, 1);

  3184. }

  3185. 

  3186. double sws_dcVec(SwsVector *a)

  3187. {

  3188.     int i;

  3189.     double sum=0;

  3190. 

  3191.     for (i=0; i<a->length; i++)

  3192.         sum+= a->coeff[i];

  3193. 

  3194.     return sum;

  3195. }

  3196. 

  3197. void sws_scaleVec(SwsVector *a, double scalar)

  3198. {

  3199.     int i;

  3200. 

  3201.     for (i=0; i<a->length; i++)

  3202.         a->coeff[i]*= scalar;

  3203. }

  3204. 

  3205. void sws_normalizeVec(SwsVector *a, double height)

  3206. {

  3207.     sws_scaleVec(a, height/sws_dcVec(a));

  3208. }

  3209. 

  3210. static SwsVector *sws_getConvVec(SwsVector *a, SwsVector *b)

  3211. {

  3212.     int length= a->length + b->length - 1;

  3213.     int i, j;

  3214.     SwsVector *vec= sws_getConstVec(0.0, length);

  3215. 

  3216.     if (!vec)

  3217.         return NULL;

  3218. 

  3219.     for (i=0; i<a->length; i++) {

  3220.         for (j=0; j<b->length; j++) {

  3221.             vec->coeff[i+j]+= a->coeff[i]*b->coeff[j];

  3222.         }

  3223.     }

  3224. 

  3225.     return vec;

  3226. }

  3227. 

  3228. static SwsVector *sws_sumVec(SwsVector *a, SwsVector *b)

  3229. {

  3230.     int length= FFMAX(a->length, b->length);

  3231.     int i;

  3232.     SwsVector *vec= sws_getConstVec(0.0, length);

  3233. 

  3234.     if (!vec)

  3235.         return NULL;

  3236. 

  3237.     for (i=0; i<a->length; i++) vec->coeff[i + (length-1)/2 - (a->length-1)/2]+= a->coeff[i];

  3238.     for (i=0; i<b->length; i++) vec->coeff[i + (length-1)/2 - (b->length-1)/2]+= b->coeff[i];

  3239. 

  3240.     return vec;

  3241. }

  3242. 

  3243. static SwsVector *sws_diffVec(SwsVector *a, SwsVector *b)

  3244. {

  3245.     int length= FFMAX(a->length, b->length);

  3246.     int i;

  3247.     SwsVector *vec= sws_getConstVec(0.0, length);

  3248. 

  3249.     if (!vec)

  3250.         return NULL;

  3251. 

  3252.     for (i=0; i<a->length; i++) vec->coeff[i + (length-1)/2 - (a->length-1)/2]+= a->coeff[i];

  3253.     for (i=0; i<b->length; i++) vec->coeff[i + (length-1)/2 - (b->length-1)/2]-= b->coeff[i];

  3254. 

  3255.     return vec;

  3256. }

  3257. 

  3258. /* shift left / or right if "shift" is negative */

  3259. static SwsVector *sws_getShiftedVec(SwsVector *a, int shift)

  3260. {

  3261.     int length= a->length + FFABS(shift)*2;

  3262.     int i;

  3263.     SwsVector *vec= sws_getConstVec(0.0, length);

  3264. 

  3265.     if (!vec)

  3266.         return NULL;

  3267. 

  3268.     for (i=0; i<a->length; i++) {

  3269.         vec->coeff[i + (length-1)/2 - (a->length-1)/2 - shift]= a->coeff[i];

  3270.     }

  3271. 

  3272.     return vec;

  3273. }

  3274. 

  3275. void sws_shiftVec(SwsVector *a, int shift)

  3276. {

  3277.     SwsVector *shifted= sws_getShiftedVec(a, shift);

  3278.     av_free(a->coeff);

  3279.     a->coeff= shifted->coeff;

  3280.     a->length= shifted->length;

  3281.     av_free(shifted);

  3282. }

  3283. 

  3284. void sws_addVec(SwsVector *a, SwsVector *b)

  3285. {

  3286.     SwsVector *sum= sws_sumVec(a, b);

  3287.     av_free(a->coeff);

  3288.     a->coeff= sum->coeff;

  3289.     a->length= sum->length;

  3290.     av_free(sum);

  3291. }

  3292. 

  3293. void sws_subVec(SwsVector *a, SwsVector *b)

  3294. {

  3295.     SwsVector *diff= sws_diffVec(a, b);

  3296.     av_free(a->coeff);

  3297.     a->coeff= diff->coeff;

  3298.     a->length= diff->length;

  3299.     av_free(diff);

  3300. }

  3301. 

  3302. void sws_convVec(SwsVector *a, SwsVector *b)

  3303. {

  3304.     SwsVector *conv= sws_getConvVec(a, b);

  3305.     av_free(a->coeff);

  3306.     a->coeff= conv->coeff;

  3307.     a->length= conv->length;

  3308.     av_free(conv);

  3309. }

  3310. 

  3311. SwsVector *sws_cloneVec(SwsVector *a)

  3312. {

  3313.     int i;

  3314.     SwsVector *vec= sws_allocVec(a->length);

  3315. 

  3316.     if (!vec)

  3317.         return NULL;

  3318. 

  3319.     for (i=0; i<a->length; i++) vec->coeff[i]= a->coeff[i];

  3320. 

  3321.     return vec;

  3322. }

  3323. 

  3324. void sws_printVec2(SwsVector *a, AVClass *log_ctx, int log_level)

  3325. {

  3326.     int i;

  3327.     double max=0;

  3328.     double min=0;

  3329.     double range;

  3330. 

  3331.     for (i=0; i<a->length; i++)

  3332.         if (a->coeff[i]>max) max= a->coeff[i];

  3333. 

  3334.     for (i=0; i<a->length; i++)

  3335.         if (a->coeff[i]<min) min= a->coeff[i];

  3336. 

  3337.     range= max - min;

  3338. 

  3339.     for (i=0; i<a->length; i++) {

  3340.         int x= (int)((a->coeff[i]-min)*60.0/range +0.5);

  3341.         av_log(log_ctx, log_level, "%1.3f ", a->coeff[i]);

  3342.         for (;x>0; x--) av_log(log_ctx, log_level, " ");

  3343.         av_log(log_ctx, log_level, "|\n");

  3344.     }

  3345. }

  3346. 

  3347. #if LIBSWSCALE_VERSION_MAJOR < 1

  3348. void sws_printVec(SwsVector *a)

  3349. {

  3350.     sws_printVec2(a, NULL, AV_LOG_DEBUG);

  3351. }

  3352. #endif

  3353. 

  3354. void sws_freeVec(SwsVector *a)

  3355. {

  3356.     if (!a) return;

  3357.     av_freep(&a->coeff);

  3358.     a->length=0;

  3359.     av_free(a);

  3360. }

  3361. 

  3362. void sws_freeFilter(SwsFilter *filter)

  3363. {

  3364.     if (!filter) return;

  3365. 

  3366.     if (filter->lumH) sws_freeVec(filter->lumH);

  3367.     if (filter->lumV) sws_freeVec(filter->lumV);

  3368.     if (filter->chrH) sws_freeVec(filter->chrH);

  3369.     if (filter->chrV) sws_freeVec(filter->chrV);

  3370.     av_free(filter);

  3371. }

  3372. 

  3373. 

  3374. void sws_freeContext(SwsContext *c)

  3375. {

  3376.     int i;

  3377.     if (!c) return;

  3378. 

  3379.     if (c->lumPixBuf) {

  3380.         for (i=0; i<c->vLumBufSize; i++)

  3381.             av_freep(&c->lumPixBuf[i]);

  3382.         av_freep(&c->lumPixBuf);

  3383.     }

  3384. 

  3385.     if (c->chrPixBuf) {

  3386.         for (i=0; i<c->vChrBufSize; i++)

  3387.             av_freep(&c->chrPixBuf[i]);

  3388.         av_freep(&c->chrPixBuf);

  3389.     }

  3390. 

  3391.     if (CONFIG_SWSCALE_ALPHA && c->alpPixBuf) {

  3392.         for (i=0; i<c->vLumBufSize; i++)

  3393.             av_freep(&c->alpPixBuf[i]);

  3394.         av_freep(&c->alpPixBuf);

  3395.     }

  3396. 

  3397.     av_freep(&c->vLumFilter);

  3398.     av_freep(&c->vChrFilter);

  3399.     av_freep(&c->hLumFilter);

  3400.     av_freep(&c->hChrFilter);

  3401. #ifdef COMPILE_ALTIVEC

  3402.     av_freep(&c->vYCoeffsBank);

  3403.     av_freep(&c->vCCoeffsBank);

  3404. #endif

  3405. 

  3406.     av_freep(&c->vLumFilterPos);

  3407.     av_freep(&c->vChrFilterPos);

  3408.     av_freep(&c->hLumFilterPos);

  3409.     av_freep(&c->hChrFilterPos);

  3410. 

  3411. #if ARCH_X86 && CONFIG_GPL

  3412. #ifdef MAP_ANONYMOUS

  3413.     if (c->lumMmx2FilterCode) munmap(c->lumMmx2FilterCode, c->lumMmx2FilterCodeSize);

  3414.     if (c->chrMmx2FilterCode) munmap(c->chrMmx2FilterCode, c->chrMmx2FilterCodeSize);

  3415. #elif HAVE_VIRTUALALLOC

  3416.     if (c->lumMmx2FilterCode) VirtualFree(c->lumMmx2FilterCode, c->lumMmx2FilterCodeSize, MEM_RELEASE);

  3417.     if (c->chrMmx2FilterCode) VirtualFree(c->chrMmx2FilterCode, c->chrMmx2FilterCodeSize, MEM_RELEASE);

  3418. #else

  3419.     av_free(c->lumMmx2FilterCode);

  3420.     av_free(c->chrMmx2FilterCode);

  3421. #endif

  3422.     c->lumMmx2FilterCode=NULL;

  3423.     c->chrMmx2FilterCode=NULL;

  3424. #endif /* ARCH_X86 && CONFIG_GPL */

  3425. 

  3426.     av_freep(&c->lumMmx2Filter);

  3427.     av_freep(&c->chrMmx2Filter);

  3428.     av_freep(&c->lumMmx2FilterPos);

  3429.     av_freep(&c->chrMmx2FilterPos);

  3430.     av_freep(&c->yuvTable);

  3431. 

  3432.     av_free(c);

  3433. }

  3434. 

  3435. struct SwsContext *sws_getCachedContext(struct SwsContext *context,

  3436.                                         int srcW, int srcH, enum PixelFormat srcFormat,

  3437.                                         int dstW, int dstH, enum PixelFormat dstFormat, int flags,

  3438.                                         SwsFilter *srcFilter, SwsFilter *dstFilter, const double *param)

  3439. {

  3440.     static const double default_param[2] = {SWS_PARAM_DEFAULT, SWS_PARAM_DEFAULT};

  3441. 

  3442.     if (!param)

  3443.         param = default_param;

  3444. 

  3445.     if (context) {

  3446.         if (context->srcW != srcW || context->srcH != srcH ||

  3447.             context->srcFormat != srcFormat ||

  3448.             context->dstW != dstW || context->dstH != dstH ||

  3449.             context->dstFormat != dstFormat || context->flags != flags ||

  3450.             context->param[0] != param[0] || context->param[1] != param[1])

  3451.         {

  3452.             sws_freeContext(context);

  3453.             context = NULL;

  3454.         }

  3455.     }

  3456.     if (!context) {

  3457.         return sws_getContext(srcW, srcH, srcFormat,

  3458.                               dstW, dstH, dstFormat, flags,

  3459.                               srcFilter, dstFilter, param);

  3460.     }

  3461.     return context;

  3462. }