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FFmpeg/postproc/swscale.c

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  1. /*

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

  3. 

  4.     This program is free software; you can redistribute it and/or modify

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

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

  7.     (at your option) any later version.

  8. 

  9.     This program is distributed in the hope that it will be useful,

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

  11.     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

  12.     GNU General Public License for more details.

  13. 

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

  15.     along with this program; if not, write to the Free Software

  16.     Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

  17. */

  18. 

  19. /*

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

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

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

  23.   

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

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

  26.   x -> x

  27.   YUV9 -> YV12

  28.   YUV9/YV12 -> Y800

  29.   Y800 -> YUV9/YV12

  30.   BGR24 -> BGR32 & RGB24 -> RGB32

  31.   BGR32 -> BGR24 & RGB32 -> RGB24

  32.   BGR15 -> BGR16

  33. */

  34. 

  35. /* 

  36. tested special converters (most are tested actually but i didnt write it down ...)

  37.  YV12 -> BGR16

  38.  YV12 -> YV12

  39.  BGR15 -> BGR16

  40.  BGR16 -> BGR16

  41.  YVU9 -> YV12

  42. 

  43. untested special converters

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

  45.   YV12/I420 -> YV12/I420

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

  47.   BGR24 -> BGR32 & RGB24 -> RGB32

  48.   BGR32 -> BGR24 & RGB32 -> RGB24

  49.   BGR24 -> YV12

  50. */

  51. 

  52. #include <inttypes.h>

  53. #include <string.h>

  54. #include <math.h>

  55. #include <stdio.h>

  56. #include "../config.h"

  57. #include "../mangle.h"

  58. #include <assert.h>

  59. #ifdef HAVE_MALLOC_H

  60. #include <malloc.h>

  61. #else

  62. #include <stdlib.h>

  63. #endif

  64. #ifdef HAVE_ALTIVEC_H

  65. #include <altivec.h>

  66. #endif

  67. #include "swscale.h"

  68. #include "swscale_internal.h"

  69. #include "../cpudetect.h"

  70. #include "../bswap.h"

  71. #include "../libvo/img_format.h"

  72. #include "rgb2rgb.h"

  73. #include "../libvo/fastmemcpy.h"

  74. 

  75. #undef MOVNTQ

  76. #undef PAVGB

  77. 

  78. //#undef HAVE_MMX2

  79. //#define HAVE_3DNOW

  80. //#undef HAVE_MMX

  81. //#undef ARCH_X86

  82. //#define WORDS_BIGENDIAN

  83. #define DITHER1XBPP

  84. 

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

  86. 

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

  88. 

  89. #ifdef MP_DEBUG

  90. #define ASSERT(x) assert(x);

  91. #else

  92. #define ASSERT(x) ;

  93. #endif

  94. 

  95. #ifdef M_PI

  96. #define PI M_PI

  97. #else

  98. #define PI 3.14159265358979323846

  99. #endif

  100. 

  101. //FIXME replace this with something faster

  102. #define isPlanarYUV(x) ((x)==IMGFMT_YV12 || (x)==IMGFMT_YVU9 \

  103. 			|| (x)==IMGFMT_444P || (x)==IMGFMT_422P || (x)==IMGFMT_411P)

  104. #define isYUV(x)       ((x)==IMGFMT_UYVY || (x)==IMGFMT_YUY2 || isPlanarYUV(x))

  105. #define isGray(x)      ((x)==IMGFMT_Y800)

  106. #define isRGB(x)       (((x)&IMGFMT_RGB_MASK)==IMGFMT_RGB)

  107. #define isBGR(x)       (((x)&IMGFMT_BGR_MASK)==IMGFMT_BGR)

  108. #define isSupportedIn(x)  ((x)==IMGFMT_YV12 || (x)==IMGFMT_YUY2 || (x)==IMGFMT_UYVY\

  109. 			|| (x)==IMGFMT_BGR32|| (x)==IMGFMT_BGR24|| (x)==IMGFMT_BGR16|| (x)==IMGFMT_BGR15\

  110. 			|| (x)==IMGFMT_RGB32|| (x)==IMGFMT_RGB24\

  111. 			|| (x)==IMGFMT_Y800 || (x)==IMGFMT_YVU9\

  112. 			|| (x)==IMGFMT_444P || (x)==IMGFMT_422P || (x)==IMGFMT_411P)

  113. #define isSupportedOut(x) ((x)==IMGFMT_YV12 || (x)==IMGFMT_YUY2 || (x)==IMGFMT_UYVY\

  114. 			|| (x)==IMGFMT_444P || (x)==IMGFMT_422P || (x)==IMGFMT_411P\

  115. 			|| isRGB(x) || isBGR(x)\

  116. 			|| (x)==IMGFMT_Y800 || (x)==IMGFMT_YVU9)

  117. #define isPacked(x)    ((x)==IMGFMT_YUY2 || (x)==IMGFMT_UYVY ||isRGB(x) || isBGR(x))

  118. 

  119. #define RGB2YUV_SHIFT 16

  120. #define BY ((int)( 0.098*(1<<RGB2YUV_SHIFT)+0.5))

  121. #define BV ((int)(-0.071*(1<<RGB2YUV_SHIFT)+0.5))

  122. #define BU ((int)( 0.439*(1<<RGB2YUV_SHIFT)+0.5))

  123. #define GY ((int)( 0.504*(1<<RGB2YUV_SHIFT)+0.5))

  124. #define GV ((int)(-0.368*(1<<RGB2YUV_SHIFT)+0.5))

  125. #define GU ((int)(-0.291*(1<<RGB2YUV_SHIFT)+0.5))

  126. #define RY ((int)( 0.257*(1<<RGB2YUV_SHIFT)+0.5))

  127. #define RV ((int)( 0.439*(1<<RGB2YUV_SHIFT)+0.5))

  128. #define RU ((int)(-0.148*(1<<RGB2YUV_SHIFT)+0.5))

  129. 

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

  131. 

  132. /*

  133. NOTES

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

  135. 

  136. TODO

  137. more intelligent missalignment avoidance for the horizontal scaler

  138. write special vertical cubic upscale version

  139. Optimize C code (yv12 / minmax)

  140. add support for packed pixel yuv input & output

  141. add support for Y8 output

  142. optimize bgr24 & bgr32

  143. add BGR4 output support

  144. write special BGR->BGR scaler

  145. */

  146. 

  147. #define ABS(a) ((a) > 0 ? (a) : (-(a)))

  148. #define MIN(a,b) ((a) > (b) ? (b) : (a))

  149. #define MAX(a,b) ((a) < (b) ? (b) : (a))

  150. 

  151. #ifdef ARCH_X86

  152. static uint64_t __attribute__((aligned(8))) bF8=       0xF8F8F8F8F8F8F8F8LL;

  153. static uint64_t __attribute__((aligned(8))) bFC=       0xFCFCFCFCFCFCFCFCLL;

  154. static uint64_t __attribute__((aligned(8))) w10=       0x0010001000100010LL;

  155. static uint64_t __attribute__((aligned(8))) w02=       0x0002000200020002LL;

  156. static uint64_t __attribute__((aligned(8))) bm00001111=0x00000000FFFFFFFFLL;

  157. static uint64_t __attribute__((aligned(8))) bm00000111=0x0000000000FFFFFFLL;

  158. static uint64_t __attribute__((aligned(8))) bm11111000=0xFFFFFFFFFF000000LL;

  159. static uint64_t __attribute__((aligned(8))) bm01010101=0x00FF00FF00FF00FFLL;

  160. 

  161. static volatile uint64_t __attribute__((aligned(8))) b5Dither;

  162. static volatile uint64_t __attribute__((aligned(8))) g5Dither;

  163. static volatile uint64_t __attribute__((aligned(8))) g6Dither;

  164. static volatile uint64_t __attribute__((aligned(8))) r5Dither;

  165. 

  166. static uint64_t __attribute__((aligned(8))) dither4[2]={

  167. 	0x0103010301030103LL,

  168. 	0x0200020002000200LL,};

  169. 

  170. static uint64_t __attribute__((aligned(8))) dither8[2]={

  171. 	0x0602060206020602LL,

  172. 	0x0004000400040004LL,};

  173. 

  174. static uint64_t __attribute__((aligned(8))) b16Mask=   0x001F001F001F001FLL;

  175. static uint64_t __attribute__((aligned(8))) g16Mask=   0x07E007E007E007E0LL;

  176. static uint64_t __attribute__((aligned(8))) r16Mask=   0xF800F800F800F800LL;

  177. static uint64_t __attribute__((aligned(8))) b15Mask=   0x001F001F001F001FLL;

  178. static uint64_t __attribute__((aligned(8))) g15Mask=   0x03E003E003E003E0LL;

  179. static uint64_t __attribute__((aligned(8))) r15Mask=   0x7C007C007C007C00LL;

  180. 

  181. static uint64_t __attribute__((aligned(8))) M24A=   0x00FF0000FF0000FFLL;

  182. static uint64_t __attribute__((aligned(8))) M24B=   0xFF0000FF0000FF00LL;

  183. static uint64_t __attribute__((aligned(8))) M24C=   0x0000FF0000FF0000LL;

  184. 

  185. #ifdef FAST_BGR2YV12

  186. static const uint64_t bgr2YCoeff  __attribute__((aligned(8))) = 0x000000210041000DULL;

  187. static const uint64_t bgr2UCoeff  __attribute__((aligned(8))) = 0x0000FFEEFFDC0038ULL;

  188. static const uint64_t bgr2VCoeff  __attribute__((aligned(8))) = 0x00000038FFD2FFF8ULL;

  189. #else

  190. static const uint64_t bgr2YCoeff  __attribute__((aligned(8))) = 0x000020E540830C8BULL;

  191. static const uint64_t bgr2UCoeff  __attribute__((aligned(8))) = 0x0000ED0FDAC23831ULL;

  192. static const uint64_t bgr2VCoeff  __attribute__((aligned(8))) = 0x00003831D0E6F6EAULL;

  193. #endif

  194. static const uint64_t bgr2YOffset __attribute__((aligned(8))) = 0x1010101010101010ULL;

  195. static const uint64_t bgr2UVOffset __attribute__((aligned(8)))= 0x8080808080808080ULL;

  196. static const uint64_t w1111       __attribute__((aligned(8))) = 0x0001000100010001ULL;

  197. #endif

  198. 

  199. // clipping helper table for C implementations:

  200. static unsigned char clip_table[768];

  201. 

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

  203. 		  

  204. extern const uint8_t dither_2x2_4[2][8];

  205. extern const uint8_t dither_2x2_8[2][8];

  206. extern const uint8_t dither_8x8_32[8][8];

  207. extern const uint8_t dither_8x8_73[8][8];

  208. extern const uint8_t dither_8x8_220[8][8];

  209. 

  210. #ifdef ARCH_X86

  211. void in_asm_used_var_warning_killer()

  212. {

  213.  volatile int i= bF8+bFC+w10+

  214.  bm00001111+bm00000111+bm11111000+b16Mask+g16Mask+r16Mask+b15Mask+g15Mask+r15Mask+

  215.  M24A+M24B+M24C+w02 + b5Dither+g5Dither+r5Dither+g6Dither+dither4[0]+dither8[0]+bm01010101;

  216.  if(i) i=0;

  217. }

  218. #endif

  219. 

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

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

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

  223. {

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

  225. 	int i;

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

  227. 	{

  228. 		int val=1<<18;

  229. 		int j;

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

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

  232. 

  233. 		dest[i]= MIN(MAX(val>>19, 0), 255);

  234. 	}

  235. 

  236. 	if(uDest != NULL)

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

  238. 		{

  239. 			int u=1<<18;

  240. 			int v=1<<18;

  241. 			int j;

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

  243. 			{

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

  245. 				v += chrSrc[j][i + 2048] * chrFilter[j];

  246. 			}

  247. 

  248. 			uDest[i]= MIN(MAX(u>>19, 0), 255);

  249. 			vDest[i]= MIN(MAX(v>>19, 0), 255);

  250. 		}

  251. }

  252. 

  253. 

  254. #define YSCALE_YUV_2_PACKEDX_C(type) \

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

  256. 			int j;\

  257. 			int Y1=1<<18;\

  258. 			int Y2=1<<18;\

  259. 			int U=1<<18;\

  260. 			int V=1<<18;\

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

  262. 			const int i2= 2*i;\

  263. 			\

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

  265. 			{\

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

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

  268. 			}\

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

  270. 			{\

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

  272. 				V += chrSrc[j][i+2048] * chrFilter[j];\

  273. 			}\

  274. 			Y1>>=19;\

  275. 			Y2>>=19;\

  276. 			U >>=19;\

  277. 			V >>=19;\

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

  279. 			{\

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

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

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

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

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

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

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

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

  288. 			}

  289.                         

  290. #define YSCALE_YUV_2_RGBX_C(type) \

  291. 			YSCALE_YUV_2_PACKEDX_C(type)\

  292. 			r = c->table_rV[V];\

  293. 			g = c->table_gU[U] + c->table_gV[V];\

  294. 			b = c->table_bU[U];\

  295. 

  296. #define YSCALE_YUV_2_PACKED2_C \

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

  298. 			const int i2= 2*i;\

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

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

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

  302. 			int V= (uvbuf0[i+2048]*uvalpha1+uvbuf1[i+2048]*uvalpha)>>19;\

  303. 

  304. #define YSCALE_YUV_2_RGB2_C(type) \

  305. 			YSCALE_YUV_2_PACKED2_C\

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

  307. 			r = c->table_rV[V];\

  308. 			g = c->table_gU[U] + c->table_gV[V];\

  309. 			b = c->table_bU[U];\

  310. 

  311. #define YSCALE_YUV_2_PACKED1_C \

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

  313. 			const int i2= 2*i;\

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

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

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

  317. 			int V= (uvbuf1[i+2048])>>7;\

  318. 

  319. #define YSCALE_YUV_2_RGB1_C(type) \

  320. 			YSCALE_YUV_2_PACKED1_C\

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

  322. 			r = c->table_rV[V];\

  323. 			g = c->table_gU[U] + c->table_gV[V];\

  324. 			b = c->table_bU[U];\

  325. 

  326. #define YSCALE_YUV_2_PACKED1B_C \

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

  328. 			const int i2= 2*i;\

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

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

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

  332. 			int V= (uvbuf0[i+2048] + uvbuf1[i+2048])>>8;\

  333. 

  334. #define YSCALE_YUV_2_RGB1B_C(type) \

  335. 			YSCALE_YUV_2_PACKED1B_C\

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

  337. 			r = c->table_rV[V];\

  338. 			g = c->table_gU[U] + c->table_gV[V];\

  339. 			b = c->table_bU[U];\

  340. 

  341. #define YSCALE_YUV_2_ANYRGB_C(func, func2)\

  342. 	switch(c->dstFormat)\

  343. 	{\

  344. 	case IMGFMT_BGR32:\

  345. 	case IMGFMT_RGB32:\

  346. 		func(uint32_t)\

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

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

  349. 		}		\

  350. 		break;\

  351. 	case IMGFMT_RGB24:\

  352. 		func(uint8_t)\

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

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

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

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

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

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

  359. 			((uint8_t*)dest)+=6;\

  360. 		}\

  361. 		break;\

  362. 	case IMGFMT_BGR24:\

  363. 		func(uint8_t)\

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

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

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

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

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

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

  370. 			((uint8_t*)dest)+=6;\

  371. 		}\

  372. 		break;\

  373. 	case IMGFMT_RGB16:\

  374. 	case IMGFMT_BGR16:\

  375. 		{\

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

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

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

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

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

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

  382. 			func(uint16_t)\

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

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

  385. 			}\

  386. 		}\

  387. 		break;\

  388. 	case IMGFMT_RGB15:\

  389. 	case IMGFMT_BGR15:\

  390. 		{\

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

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

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

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

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

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

  397. 			func(uint16_t)\

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

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

  400. 			}\

  401. 		}\

  402. 		break;\

  403. 	case IMGFMT_RGB8:\

  404. 	case IMGFMT_BGR8:\

  405. 		{\

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

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

  408. 			func(uint8_t)\

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

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

  411. 			}\

  412. 		}\

  413. 		break;\

  414. 	case IMGFMT_RGB4:\

  415. 	case IMGFMT_BGR4:\

  416. 		{\

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

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

  419. 			func(uint8_t)\

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

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

  422. 			}\

  423. 		}\

  424. 		break;\

  425. 	case IMGFMT_RG4B:\

  426. 	case IMGFMT_BG4B:\

  427. 		{\

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

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

  430. 			func(uint8_t)\

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

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

  433. 			}\

  434. 		}\

  435. 		break;\

  436. 	case IMGFMT_RGB1:\

  437. 	case IMGFMT_BGR1:\

  438. 		{\

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

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

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

  442. 				int acc;\

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

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

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

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

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

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

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

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

  451. 				((uint8_t*)dest)[0]= acc;\

  452. 				((uint8_t*)dest)++;\

  453. 			}\

  454. \

  455. /*\

  456. ((uint8_t*)dest)-= dstW>>4;\

  457. {\

  458. 			int acc=0;\

  459. 			int left=0;\

  460. 			static int top[1024];\

  461. 			static int last_new[1024][1024];\

  462. 			static int last_in3[1024][1024];\

  463. 			static int drift[1024][1024];\

  464. 			int topLeft=0;\

  465. 			int shift=0;\

  466. 			int count=0;\

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

  468. 			int error_new=0;\

  469. 			int error_in3=0;\

  470. 			int f=0;\

  471. 			\

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

  473. 				int in= ((buf0[i  ]*yalpha1+buf1[i  ]*yalpha)>>19);\

  474. 				int in2 = (76309 * (in - 16) + 32768) >> 16;\

  475. 				int in3 = (in2 < 0) ? 0 : ((in2 > 255) ? 255 : in2);\

  476. 				int old= (left*7 + topLeft + top[i]*5 + top[i+1]*3)/20 + in3\

  477. 					+ (last_new[y][i] - in3)*f/256;\

  478. 				int new= old> 128 ? 255 : 0;\

  479. \

  480. 				error_new+= ABS(last_new[y][i] - new);\

  481. 				error_in3+= ABS(last_in3[y][i] - in3);\

  482. 				f= error_new - error_in3*4;\

  483. 				if(f<0) f=0;\

  484. 				if(f>256) f=256;\

  485. \

  486. 				topLeft= top[i];\

  487. 				left= top[i]= old - new;\

  488. 				last_new[y][i]= new;\

  489. 				last_in3[y][i]= in3;\

  490. \

  491. 				acc+= acc + (new&1);\

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

  493. 					((uint8_t*)dest)[0]= acc;\

  494. 					((uint8_t*)dest)++;\

  495. 				}\

  496. 			}\

  497. }\

  498. */\

  499. 		}\

  500. 		break;\

  501. 	case IMGFMT_YUY2:\

  502. 		func2\

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

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

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

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

  507. 		}		\

  508. 		break;\

  509. 	case IMGFMT_UYVY:\

  510. 		func2\

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

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

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

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

  515. 		}		\

  516. 		break;\

  517. 	}\

  518. 

  519. 

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

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

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

  523. {

  524. 	int i;

  525. 	switch(c->dstFormat)

  526. 	{

  527. 	case IMGFMT_RGB32:

  528. 	case IMGFMT_BGR32:

  529. 		YSCALE_YUV_2_RGBX_C(uint32_t)

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

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

  532. 		}

  533. 		break;

  534. 	case IMGFMT_RGB24:

  535. 		YSCALE_YUV_2_RGBX_C(uint8_t)

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

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

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

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

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

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

  542. 			((uint8_t*)dest)+=6;

  543. 		}

  544. 		break;

  545. 	case IMGFMT_BGR24:

  546. 		YSCALE_YUV_2_RGBX_C(uint8_t)

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

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

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

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

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

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

  553. 			((uint8_t*)dest)+=6;

  554. 		}

  555. 		break;

  556. 	case IMGFMT_RGB16:

  557. 	case IMGFMT_BGR16:

  558. 		{

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

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

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

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

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

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

  565. 			YSCALE_YUV_2_RGBX_C(uint16_t)

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

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

  568. 			}

  569. 		}

  570. 		break;

  571. 	case IMGFMT_RGB15:

  572. 	case IMGFMT_BGR15:

  573. 		{

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

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

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

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

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

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

  580. 			YSCALE_YUV_2_RGBX_C(uint16_t)

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

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

  583. 			}

  584. 		}

  585. 		break;

  586. 	case IMGFMT_RGB8:

  587. 	case IMGFMT_BGR8:

  588. 		{

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

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

  591. 			YSCALE_YUV_2_RGBX_C(uint8_t)

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

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

  594. 			}

  595. 		}

  596. 		break;

  597. 	case IMGFMT_RGB4:

  598. 	case IMGFMT_BGR4:

  599. 		{

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

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

  602. 			YSCALE_YUV_2_RGBX_C(uint8_t)

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

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

  605. 			}

  606. 		}

  607. 		break;

  608. 	case IMGFMT_RG4B:

  609. 	case IMGFMT_BG4B:

  610. 		{

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

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

  613. 			YSCALE_YUV_2_RGBX_C(uint8_t)

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

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

  616. 			}

  617. 		}

  618. 		break;

  619. 	case IMGFMT_RGB1:

  620. 	case IMGFMT_BGR1:

  621. 		{

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

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

  624. 			int acc=0;

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

  626. 				int j;

  627. 				int Y1=1<<18;

  628. 				int Y2=1<<18;

  629. 

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

  631. 				{

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

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

  634. 				}

  635. 				Y1>>=19;

  636. 				Y2>>=19;

  637. 				if((Y1|Y2)&256)

  638. 				{

  639. 					if(Y1>255)   Y1=255;

  640. 					else if(Y1<0)Y1=0;

  641. 					if(Y2>255)   Y2=255;

  642. 					else if(Y2<0)Y2=0;

  643. 				}

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

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

  646. 				if((i&7)==6){

  647. 					((uint8_t*)dest)[0]= acc;

  648. 					((uint8_t*)dest)++;

  649. 				}

  650. 			}

  651. 		}

  652. 		break;

  653. 	case IMGFMT_YUY2:

  654. 		YSCALE_YUV_2_PACKEDX_C(void)

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

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

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

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

  659. 		}

  660.                 break;

  661. 	case IMGFMT_UYVY:

  662. 		YSCALE_YUV_2_PACKEDX_C(void)

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

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

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

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

  667. 		}

  668.                 break;

  669. 	}

  670. }

  671. 

  672. 

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

  674. //Plain C versions

  675. #if !defined (HAVE_MMX) || defined (RUNTIME_CPUDETECT)

  676. #define COMPILE_C

  677. #endif

  678. 

  679. #ifdef ARCH_POWERPC

  680. #ifdef HAVE_ALTIVEC

  681. #define COMPILE_ALTIVEC

  682. #endif //HAVE_ALTIVEC

  683. #endif //ARCH_POWERPC

  684. 

  685. #ifdef ARCH_X86

  686. 

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

  688. #define COMPILE_MMX

  689. #endif

  690. 

  691. #if defined (HAVE_MMX2) || defined (RUNTIME_CPUDETECT)

  692. #define COMPILE_MMX2

  693. #endif

  694. 

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

  696. #define COMPILE_3DNOW

  697. #endif

  698. #endif //ARCH_X86

  699. 

  700. #undef HAVE_MMX

  701. #undef HAVE_MMX2

  702. #undef HAVE_3DNOW

  703. 

  704. #ifdef COMPILE_C

  705. #undef HAVE_MMX

  706. #undef HAVE_MMX2

  707. #undef HAVE_3DNOW

  708. #undef HAVE_ALTIVEC

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

  710. #include "swscale_template.c"

  711. #endif

  712. 

  713. #ifdef ARCH_POWERPC

  714. #ifdef COMPILE_ALTIVEC

  715. #undef RENAME

  716. #define HAVE_ALTIVEC

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

  718. #include "swscale_template.c"

  719. #endif

  720. #endif //ARCH_POWERPC

  721. 

  722. #ifdef ARCH_X86

  723. 

  724. //X86 versions

  725. /*

  726. #undef RENAME

  727. #undef HAVE_MMX

  728. #undef HAVE_MMX2

  729. #undef HAVE_3DNOW

  730. #define ARCH_X86

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

  732. #include "swscale_template.c"

  733. */

  734. //MMX versions

  735. #ifdef COMPILE_MMX

  736. #undef RENAME

  737. #define HAVE_MMX

  738. #undef HAVE_MMX2

  739. #undef HAVE_3DNOW

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

  741. #include "swscale_template.c"

  742. #endif

  743. 

  744. //MMX2 versions

  745. #ifdef COMPILE_MMX2

  746. #undef RENAME

  747. #define HAVE_MMX

  748. #define HAVE_MMX2

  749. #undef HAVE_3DNOW

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

  751. #include "swscale_template.c"

  752. #endif

  753. 

  754. //3DNOW versions

  755. #ifdef COMPILE_3DNOW

  756. #undef RENAME

  757. #define HAVE_MMX

  758. #undef HAVE_MMX2

  759. #define HAVE_3DNOW

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

  761. #include "swscale_template.c"

  762. #endif

  763. 

  764. #endif //ARCH_X86

  765. 

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

  767. 

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

  769. {

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

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

  772. 	else		return getSplineCoeff(	0.0, 

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

  774. 						        c + 3.0*d,

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

  776. 						dist-1.0);

  777. }

  778. 

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

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

  781. 			      SwsVector *srcFilter, SwsVector *dstFilter)

  782. {

  783. 	int i;

  784. 	int filterSize;

  785. 	int filter2Size;

  786. 	int minFilterSize;

  787. 	double *filter=NULL;

  788. 	double *filter2=NULL;

  789. #ifdef ARCH_X86

  790. 	if(flags & SWS_CPU_CAPS_MMX)

  791. 		asm volatile("emms\n\t"::: "memory"); //FIXME this shouldnt be required but it IS (even for non mmx versions)

  792. #endif

  793. 

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

  795. 	*filterPos = (int16_t*)memalign(8, (dstW+1)*sizeof(int16_t));

  796. 

  797. 	if(ABS(xInc - 0x10000) <10) // unscaled

  798. 	{

  799. 		int i;

  800. 		filterSize= 1;

  801. 		filter= (double*)memalign(8, dstW*sizeof(double)*filterSize);

  802. 		for(i=0; i<dstW*filterSize; i++) filter[i]=0;

  803. 

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

  805. 		{

  806. 			filter[i*filterSize]=1;

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

  808. 		}

  809. 

  810. 	}

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

  812. 	{

  813. 		int i;

  814. 		int xDstInSrc;

  815. 		filterSize= 1;

  816. 		filter= (double*)memalign(8, dstW*sizeof(double)*filterSize);

  817. 		

  818. 		xDstInSrc= xInc/2 - 0x8000;

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

  820. 		{

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

  822. 

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

  824. 			filter[i]= 1.0;

  825. 			xDstInSrc+= xInc;

  826. 		}

  827. 	}

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

  829. 	{

  830. 		int i;

  831. 		int xDstInSrc;

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

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

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

  835. 		filter= (double*)memalign(8, dstW*sizeof(double)*filterSize);

  836. 

  837. 		xDstInSrc= xInc/2 - 0x8000;

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

  839. 		{

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

  841. 			int j;

  842. 

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

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

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

  846. 				{

  847. 					double d= ABS((xx<<16) - xDstInSrc)/(double)(1<<16);

  848. 					double coeff= 1.0 - d;

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

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

  851. 					xx++;

  852. 				}

  853. 			xDstInSrc+= xInc;

  854. 		}

  855. 	}

  856. 	else

  857. 	{

  858. 		double xDstInSrc;

  859. 		double sizeFactor, filterSizeInSrc;

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

  861. 		int param= (flags&SWS_PARAM_MASK)>>SWS_PARAM_SHIFT;

  862. 

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

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

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

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

  867. 		else if(flags&SWS_LANCZOS)	sizeFactor= param ? 2.0*param : 6.0;

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

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

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

  871. 		else {

  872. 			sizeFactor= 0.0; //GCC warning killer

  873. 			ASSERT(0)

  874. 		}

  875. 		

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

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

  878. 

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

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

  881. 

  882. 		filter= (double*)memalign(16, dstW*sizeof(double)*filterSize);

  883. 

  884. 		xDstInSrc= xInc1 / 2.0 - 0.5;

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

  886. 		{

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

  888. 			int j;

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

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

  891. 			{

  892. 				double d= ABS(xx - xDstInSrc)/filterSizeInSrc*sizeFactor;

  893. 				double coeff;

  894. 				if(flags & SWS_BICUBIC)

  895. 				{

  896. 					double A= param ? -param*0.01 : -0.60;

  897. 					

  898. 					// Equation is from VirtualDub

  899. 					if(d<1.0)

  900. 						coeff = (1.0 - (A+3.0)*d*d + (A+2.0)*d*d*d);

  901. 					else if(d<2.0)

  902. 						coeff = (-4.0*A + 8.0*A*d - 5.0*A*d*d + A*d*d*d);

  903. 					else

  904. 						coeff=0.0;

  905. 				}

  906. /*				else if(flags & SWS_X)

  907. 				{

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

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

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

  911. 				}*/

  912. 				else if(flags & SWS_X)

  913. 				{

  914. 					double A= param ? param*0.1 : 1.0;

  915. 					

  916. 					if(d<1.0)

  917. 						coeff = cos(d*PI);

  918. 					else

  919. 						coeff=-1.0;

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

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

  922. 					coeff= coeff*0.5 + 0.5;

  923. 				}

  924. 				else if(flags & SWS_AREA)

  925. 				{

  926. 					double srcPixelSize= 1.0/xInc1;

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

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

  929. 					else coeff=0.0;

  930. 				}

  931. 				else if(flags & SWS_GAUSS)

  932. 				{

  933. 					double p= param ? param*0.1 : 3.0;

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

  935. 				}

  936. 				else if(flags & SWS_SINC)

  937. 				{

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

  939. 				}

  940. 				else if(flags & SWS_LANCZOS)

  941. 				{

  942. 					double p= param ? param : 3.0; 

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

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

  945. 				}

  946. 				else if(flags & SWS_BILINEAR)

  947. 				{

  948. 					coeff= 1.0 - d;

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

  950. 				}

  951. 				else if(flags & SWS_SPLINE)

  952. 				{

  953. 					double p=-2.196152422706632;

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

  955. 				}

  956. 				else {

  957. 					coeff= 0.0; //GCC warning killer

  958. 					ASSERT(0)

  959. 				}

  960. 

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

  962. 				xx++;

  963. 			}

  964. 			xDstInSrc+= xInc1;

  965. 		}

  966. 	}

  967. 

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

  969. 	   free(filter);

  970. 	*/

  971. 	ASSERT(filterSize>0)

  972. 	filter2Size= filterSize;

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

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

  975. 	ASSERT(filter2Size>0)

  976. 	filter2= (double*)memalign(8, filter2Size*dstW*sizeof(double));

  977. 

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

  979. 	{

  980. 		int j;

  981. 		SwsVector scaleFilter;

  982. 		SwsVector *outVec;

  983. 

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

  985. 		scaleFilter.length= filterSize;

  986. 

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

  988. 		else	      outVec= &scaleFilter;

  989. 

  990. 		ASSERT(outVec->length == filter2Size)

  991. 		//FIXME dstFilter

  992. 

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

  994. 		{

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

  996. 		}

  997. 

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

  999. 

  1000. 		if(outVec != &scaleFilter) sws_freeVec(outVec);

  1001. 	}

  1002. 	free(filter); filter=NULL;

  1003. 

  1004. 	/* try to reduce the filter-size (step1 find size and shift left) */

  1005. 	// Assume its near normalized (*0.5 or *2.0 is ok but * 0.001 is not)

  1006. 	minFilterSize= 0;

  1007. 	for(i=dstW-1; i>=0; i--)

  1008. 	{

  1009. 		int min= filter2Size;

  1010. 		int j;

  1011. 		double cutOff=0.0;

  1012. 

  1013. 		/* get rid off near zero elements on the left by shifting left */

  1014. 		for(j=0; j<filter2Size; j++)

  1015. 		{

  1016. 			int k;

  1017. 			cutOff += ABS(filter2[i*filter2Size]);

  1018. 

  1019. 			if(cutOff > SWS_MAX_REDUCE_CUTOFF) break;

  1020. 

  1021. 			/* preserve Monotonicity because the core can't handle the filter otherwise */

  1022. 			if(i<dstW-1 && (*filterPos)[i] >= (*filterPos)[i+1]) break;

  1023. 

  1024. 			// Move filter coeffs left

  1025. 			for(k=1; k<filter2Size; k++)

  1026. 				filter2[i*filter2Size + k - 1]= filter2[i*filter2Size + k];

  1027. 			filter2[i*filter2Size + k - 1]= 0.0;

  1028. 			(*filterPos)[i]++;

  1029. 		}

  1030. 

  1031. 		cutOff=0.0;

  1032. 		/* count near zeros on the right */

  1033. 		for(j=filter2Size-1; j>0; j--)

  1034. 		{

  1035. 			cutOff += ABS(filter2[i*filter2Size + j]);

  1036. 

  1037. 			if(cutOff > SWS_MAX_REDUCE_CUTOFF) break;

  1038. 			min--;

  1039. 		}

  1040. 

  1041. 		if(min>minFilterSize) minFilterSize= min;

  1042. 	}

  1043. 

  1044. 	ASSERT(minFilterSize > 0)

  1045. 	filterSize= (minFilterSize +(filterAlign-1)) & (~(filterAlign-1));

  1046. 	ASSERT(filterSize > 0)

  1047. 	filter= (double*)memalign(8, filterSize*dstW*sizeof(double));

  1048. 	*outFilterSize= filterSize;

  1049. 

  1050. 	if(flags&SWS_PRINT_INFO)

  1051. 		MSG_INFO("SwScaler: reducing / aligning filtersize %d -> %d\n", filter2Size, filterSize);

  1052. 	/* try to reduce the filter-size (step2 reduce it) */

  1053. 	for(i=0; i<dstW; i++)

  1054. 	{

  1055. 		int j;

  1056. 

  1057. 		for(j=0; j<filterSize; j++)

  1058. 		{

  1059. 			if(j>=filter2Size) filter[i*filterSize + j]= 0.0;

  1060. 			else		   filter[i*filterSize + j]= filter2[i*filter2Size + j];

  1061. 		}

  1062. 	}

  1063. 	free(filter2); filter2=NULL;

  1064. 	

  1065. 

  1066. 	//FIXME try to align filterpos if possible

  1067. 

  1068. 	//fix borders

  1069. 	for(i=0; i<dstW; i++)

  1070. 	{

  1071. 		int j;

  1072. 		if((*filterPos)[i] < 0)

  1073. 		{

  1074. 			// Move filter coeffs left to compensate for filterPos

  1075. 			for(j=1; j<filterSize; j++)

  1076. 			{

  1077. 				int left= MAX(j + (*filterPos)[i], 0);

  1078. 				filter[i*filterSize + left] += filter[i*filterSize + j];

  1079. 				filter[i*filterSize + j]=0;

  1080. 			}

  1081. 			(*filterPos)[i]= 0;

  1082. 		}

  1083. 

  1084. 		if((*filterPos)[i] + filterSize > srcW)

  1085. 		{

  1086. 			int shift= (*filterPos)[i] + filterSize - srcW;

  1087. 			// Move filter coeffs right to compensate for filterPos

  1088. 			for(j=filterSize-2; j>=0; j--)

  1089. 			{

  1090. 				int right= MIN(j + shift, filterSize-1);

  1091. 				filter[i*filterSize +right] += filter[i*filterSize +j];

  1092. 				filter[i*filterSize +j]=0;

  1093. 			}

  1094. 			(*filterPos)[i]= srcW - filterSize;

  1095. 		}

  1096. 	}

  1097. 

  1098. 	// Note the +1 is for the MMXscaler which reads over the end

  1099. 	*outFilter= (int16_t*)memalign(8, *outFilterSize*(dstW+1)*sizeof(int16_t));

  1100. 	memset(*outFilter, 0, *outFilterSize*(dstW+1)*sizeof(int16_t));

  1101. 

  1102. 	/* Normalize & Store in outFilter */

  1103. 	for(i=0; i<dstW; i++)

  1104. 	{

  1105. 		int j;

  1106. 		double error=0;

  1107. 		double sum=0;

  1108. 		double scale= one;

  1109. 

  1110. 		for(j=0; j<filterSize; j++)

  1111. 		{

  1112. 			sum+= filter[i*filterSize + j];

  1113. 		}

  1114. 		scale/= sum;

  1115. 		for(j=0; j<*outFilterSize; j++)

  1116. 		{

  1117. 			double v= filter[i*filterSize + j]*scale + error;

  1118. 			int intV= floor(v + 0.5);

  1119. 			(*outFilter)[i*(*outFilterSize) + j]= intV;

  1120. 			error = v - intV;

  1121. 		}

  1122. 	}

  1123. 	

  1124. 	(*filterPos)[dstW]= (*filterPos)[dstW-1]; // the MMX scaler will read over the end

  1125. 	for(i=0; i<*outFilterSize; i++)

  1126. 	{

  1127. 		int j= dstW*(*outFilterSize);

  1128. 		(*outFilter)[j + i]= (*outFilter)[j + i - (*outFilterSize)];

  1129. 	}

  1130. 

  1131. 	free(filter);

  1132. }

  1133. 

  1134. #ifdef ARCH_X86

  1135. static void initMMX2HScaler(int dstW, int xInc, uint8_t *funnyCode, int16_t *filter, int32_t *filterPos, int numSplits)

  1136. {

  1137. 	uint8_t *fragmentA;

  1138. 	int imm8OfPShufW1A;

  1139. 	int imm8OfPShufW2A;

  1140. 	int fragmentLengthA;

  1141. 	uint8_t *fragmentB;

  1142. 	int imm8OfPShufW1B;

  1143. 	int imm8OfPShufW2B;

  1144. 	int fragmentLengthB;

  1145. 	int fragmentPos;

  1146. 

  1147. 	int xpos, i;

  1148. 

  1149. 	// create an optimized horizontal scaling routine

  1150. 

  1151. 	//code fragment

  1152. 

  1153. 	asm volatile(

  1154. 		"jmp 9f				\n\t"

  1155. 	// Begin

  1156. 		"0:				\n\t"

  1157. 		"movq (%%edx, %%eax), %%mm3	\n\t" 

  1158. 		"movd (%%ecx, %%esi), %%mm0	\n\t" 

  1159. 		"movd 1(%%ecx, %%esi), %%mm1	\n\t"

  1160. 		"punpcklbw %%mm7, %%mm1		\n\t"

  1161. 		"punpcklbw %%mm7, %%mm0		\n\t"

  1162. 		"pshufw $0xFF, %%mm1, %%mm1	\n\t"

  1163. 		"1:				\n\t"

  1164. 		"pshufw $0xFF, %%mm0, %%mm0	\n\t"

  1165. 		"2:				\n\t"

  1166. 		"psubw %%mm1, %%mm0		\n\t"

  1167. 		"movl 8(%%ebx, %%eax), %%esi	\n\t"

  1168. 		"pmullw %%mm3, %%mm0		\n\t"

  1169. 		"psllw $7, %%mm1		\n\t"

  1170. 		"paddw %%mm1, %%mm0		\n\t"

  1171. 

  1172. 		"movq %%mm0, (%%edi, %%eax)	\n\t"

  1173. 

  1174. 		"addl $8, %%eax			\n\t"

  1175. 	// End

  1176. 		"9:				\n\t"

  1177. //		"int $3\n\t"

  1178. 		"leal 0b, %0			\n\t"

  1179. 		"leal 1b, %1			\n\t"

  1180. 		"leal 2b, %2			\n\t"

  1181. 		"decl %1			\n\t"

  1182. 		"decl %2			\n\t"

  1183. 		"subl %0, %1			\n\t"

  1184. 		"subl %0, %2			\n\t"

  1185. 		"leal 9b, %3			\n\t"

  1186. 		"subl %0, %3			\n\t"

  1187. 

  1188. 

  1189. 		:"=r" (fragmentA), "=r" (imm8OfPShufW1A), "=r" (imm8OfPShufW2A),

  1190. 		"=r" (fragmentLengthA)

  1191. 	);

  1192. 

  1193. 	asm volatile(

  1194. 		"jmp 9f				\n\t"

  1195. 	// Begin

  1196. 		"0:				\n\t"

  1197. 		"movq (%%edx, %%eax), %%mm3	\n\t" 

  1198. 		"movd (%%ecx, %%esi), %%mm0	\n\t" 

  1199. 		"punpcklbw %%mm7, %%mm0		\n\t"

  1200. 		"pshufw $0xFF, %%mm0, %%mm1	\n\t"

  1201. 		"1:				\n\t"

  1202. 		"pshufw $0xFF, %%mm0, %%mm0	\n\t"

  1203. 		"2:				\n\t"

  1204. 		"psubw %%mm1, %%mm0		\n\t"

  1205. 		"movl 8(%%ebx, %%eax), %%esi	\n\t"

  1206. 		"pmullw %%mm3, %%mm0		\n\t"

  1207. 		"psllw $7, %%mm1		\n\t"

  1208. 		"paddw %%mm1, %%mm0		\n\t"

  1209. 

  1210. 		"movq %%mm0, (%%edi, %%eax)	\n\t"

  1211. 

  1212. 		"addl $8, %%eax			\n\t"

  1213. 	// End

  1214. 		"9:				\n\t"

  1215. //		"int $3\n\t"

  1216. 		"leal 0b, %0			\n\t"

  1217. 		"leal 1b, %1			\n\t"

  1218. 		"leal 2b, %2			\n\t"

  1219. 		"decl %1			\n\t"

  1220. 		"decl %2			\n\t"

  1221. 		"subl %0, %1			\n\t"

  1222. 		"subl %0, %2			\n\t"

  1223. 		"leal 9b, %3			\n\t"

  1224. 		"subl %0, %3			\n\t"

  1225. 

  1226. 

  1227. 		:"=r" (fragmentB), "=r" (imm8OfPShufW1B), "=r" (imm8OfPShufW2B),

  1228. 		"=r" (fragmentLengthB)

  1229. 	);

  1230. 

  1231. 	xpos= 0; //lumXInc/2 - 0x8000; // difference between pixel centers

  1232. 	fragmentPos=0;

  1233. 	

  1234. 	for(i=0; i<dstW/numSplits; i++)

  1235. 	{

  1236. 		int xx=xpos>>16;

  1237. 

  1238. 		if((i&3) == 0)

  1239. 		{

  1240. 			int a=0;

  1241. 			int b=((xpos+xInc)>>16) - xx;

  1242. 			int c=((xpos+xInc*2)>>16) - xx;

  1243. 			int d=((xpos+xInc*3)>>16) - xx;

  1244. 

  1245. 			filter[i  ] = (( xpos         & 0xFFFF) ^ 0xFFFF)>>9;

  1246. 			filter[i+1] = (((xpos+xInc  ) & 0xFFFF) ^ 0xFFFF)>>9;

  1247. 			filter[i+2] = (((xpos+xInc*2) & 0xFFFF) ^ 0xFFFF)>>9;

  1248. 			filter[i+3] = (((xpos+xInc*3) & 0xFFFF) ^ 0xFFFF)>>9;

  1249. 			filterPos[i/2]= xx;

  1250. 

  1251. 			if(d+1<4)

  1252. 			{

  1253. 				int maxShift= 3-(d+1);

  1254. 				int shift=0;

  1255. 

  1256. 				memcpy(funnyCode + fragmentPos, fragmentB, fragmentLengthB);

  1257. 

  1258. 				funnyCode[fragmentPos + imm8OfPShufW1B]=

  1259. 					(a+1) | ((b+1)<<2) | ((c+1)<<4) | ((d+1)<<6);

  1260. 				funnyCode[fragmentPos + imm8OfPShufW2B]=

  1261. 					a | (b<<2) | (c<<4) | (d<<6);

  1262. 

  1263. 				if(i+3>=dstW) shift=maxShift; //avoid overread

  1264. 				else if((filterPos[i/2]&3) <= maxShift) shift=filterPos[i/2]&3; //Align

  1265. 

  1266. 				if(shift && i>=shift)

  1267. 				{

  1268. 					funnyCode[fragmentPos + imm8OfPShufW1B]+= 0x55*shift;

  1269. 					funnyCode[fragmentPos + imm8OfPShufW2B]+= 0x55*shift;

  1270. 					filterPos[i/2]-=shift;

  1271. 				}

  1272. 

  1273. 				fragmentPos+= fragmentLengthB;

  1274. 			}

  1275. 			else

  1276. 			{

  1277. 				int maxShift= 3-d;

  1278. 				int shift=0;

  1279. 

  1280. 				memcpy(funnyCode + fragmentPos, fragmentA, fragmentLengthA);

  1281. 

  1282. 				funnyCode[fragmentPos + imm8OfPShufW1A]=

  1283. 				funnyCode[fragmentPos + imm8OfPShufW2A]=

  1284. 					a | (b<<2) | (c<<4) | (d<<6);

  1285. 

  1286. 				if(i+4>=dstW) shift=maxShift; //avoid overread

  1287. 				else if((filterPos[i/2]&3) <= maxShift) shift=filterPos[i/2]&3; //partial align

  1288. 

  1289. 				if(shift && i>=shift)

  1290. 				{

  1291. 					funnyCode[fragmentPos + imm8OfPShufW1A]+= 0x55*shift;

  1292. 					funnyCode[fragmentPos + imm8OfPShufW2A]+= 0x55*shift;

  1293. 					filterPos[i/2]-=shift;

  1294. 				}

  1295. 

  1296. 				fragmentPos+= fragmentLengthA;

  1297. 			}

  1298. 

  1299. 			funnyCode[fragmentPos]= RET;

  1300. 		}

  1301. 		xpos+=xInc;

  1302. 	}

  1303. 	filterPos[i/2]= xpos>>16; // needed to jump to the next part

  1304. }

  1305. #endif // ARCH_X86

  1306. 

  1307. static void globalInit(){

  1308.     // generating tables:

  1309.     int i;

  1310.     for(i=0; i<768; i++){

  1311. 	int c= MIN(MAX(i-256, 0), 255);

  1312. 	clip_table[i]=c;

  1313.     }

  1314. }

  1315. 

  1316. static SwsFunc getSwsFunc(int flags){

  1317.     

  1318. #ifdef RUNTIME_CPUDETECT

  1319. #ifdef ARCH_X86

  1320. 	// ordered per speed fasterst first

  1321. 	if(flags & SWS_CPU_CAPS_MMX2)

  1322. 		return swScale_MMX2;

  1323. 	else if(flags & SWS_CPU_CAPS_3DNOW)

  1324. 		return swScale_3DNow;

  1325. 	else if(flags & SWS_CPU_CAPS_MMX)

  1326. 		return swScale_MMX;

  1327. 	else

  1328. 		return swScale_C;

  1329. 

  1330. #else

  1331. #ifdef ARCH_POWERPC

  1332. 	if(flags & SWS_CPU_CAPS_ALTIVEC)

  1333. 	  return swScale_altivec;

  1334. 	else

  1335. 	  return swScale_C;

  1336. #endif

  1337. 	return swScale_C;

  1338. #endif

  1339. #else //RUNTIME_CPUDETECT

  1340. #ifdef HAVE_MMX2

  1341. 	return swScale_MMX2;

  1342. #elif defined (HAVE_3DNOW)

  1343. 	return swScale_3DNow;

  1344. #elif defined (HAVE_MMX)

  1345. 	return swScale_MMX;

  1346. #elif defined (HAVE_ALTIVEC)

  1347. 	return swScale_altivec;

  1348. #else

  1349. 	return swScale_C;

  1350. #endif

  1351. #endif //!RUNTIME_CPUDETECT

  1352. }

  1353. 

  1354. static int PlanarToNV12Wrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1355.              int srcSliceH, uint8_t* dstParam[], int dstStride[]){

  1356. 	uint8_t *dst=dstParam[0] + dstStride[0]*srcSliceY;

  1357. 	/* Copy Y plane */

  1358. 	if(dstStride[0]==srcStride[0])

  1359. 		memcpy(dst, src[0], srcSliceH*dstStride[0]);

  1360. 	else

  1361. 	{

  1362. 		int i;

  1363. 		uint8_t *srcPtr= src[0];

  1364. 		uint8_t *dstPtr= dst;

  1365. 		for(i=0; i<srcSliceH; i++)

  1366. 		{

  1367. 			memcpy(dstPtr, srcPtr, srcStride[0]);

  1368. 			srcPtr+= srcStride[0];

  1369. 			dstPtr+= dstStride[0];

  1370. 		}

  1371. 	}

  1372. 	dst = dstParam[1] + dstStride[1]*srcSliceY;

  1373. 	interleaveBytes( src[1],src[2],dst,c->srcW,srcSliceH,srcStride[1],srcStride[2],dstStride[0] );

  1374. 

  1375. 	return srcSliceH;

  1376. }

  1377. 

  1378. static int PlanarToYuy2Wrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1379.              int srcSliceH, uint8_t* dstParam[], int dstStride[]){

  1380. 	uint8_t *dst=dstParam[0] + dstStride[0]*srcSliceY;

  1381. 

  1382. 	yv12toyuy2( src[0],src[1],src[2],dst,c->srcW,srcSliceH,srcStride[0],srcStride[1],dstStride[0] );

  1383. 

  1384. 	return srcSliceH;

  1385. }

  1386. 

  1387. static int PlanarToUyvyWrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1388.              int srcSliceH, uint8_t* dstParam[], int dstStride[]){

  1389. 	uint8_t *dst=dstParam[0] + dstStride[0]*srcSliceY;

  1390. 

  1391. 	yv12touyvy( src[0],src[1],src[2],dst,c->srcW,srcSliceH,srcStride[0],srcStride[1],dstStride[0] );

  1392. 

  1393. 	return srcSliceH;

  1394. }

  1395. 

  1396. /* {RGB,BGR}{15,16,24,32} -> {RGB,BGR}{15,16,24,32} */

  1397. static int rgb2rgbWrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1398. 			   int srcSliceH, uint8_t* dst[], int dstStride[]){

  1399. 	const int srcFormat= c->srcFormat;

  1400. 	const int dstFormat= c->dstFormat;

  1401. 	const int srcBpp= ((srcFormat&0xFF) + 7)>>3;

  1402. 	const int dstBpp= ((dstFormat&0xFF) + 7)>>3;

  1403. 	const int srcId= (srcFormat&0xFF)>>2; // 1:0, 4:1, 8:2, 15:3, 16:4, 24:6, 32:8 

  1404. 	const int dstId= (dstFormat&0xFF)>>2;

  1405. 	void (*conv)(const uint8_t *src, uint8_t *dst, unsigned src_size)=NULL;

  1406. 

  1407. 	/* BGR -> BGR */

  1408. 	if(   (isBGR(srcFormat) && isBGR(dstFormat))

  1409. 	   || (isRGB(srcFormat) && isRGB(dstFormat))){

  1410. 		switch(srcId | (dstId<<4)){

  1411. 		case 0x34: conv= rgb16to15; break;

  1412. 		case 0x36: conv= rgb24to15; break;

  1413. 		case 0x38: conv= rgb32to15; break;

  1414. 		case 0x43: conv= rgb15to16; break;

  1415. 		case 0x46: conv= rgb24to16; break;

  1416. 		case 0x48: conv= rgb32to16; break;

  1417. 		case 0x63: conv= rgb15to24; break;

  1418. 		case 0x64: conv= rgb16to24; break;

  1419. 		case 0x68: conv= rgb32to24; break;

  1420. 		case 0x83: conv= rgb15to32; break;

  1421. 		case 0x84: conv= rgb16to32; break;

  1422. 		case 0x86: conv= rgb24to32; break;

  1423. 		default: MSG_ERR("swScaler: internal error %s -> %s converter\n", 

  1424. 				 vo_format_name(srcFormat), vo_format_name(dstFormat)); break;

  1425. 		}

  1426. 	}else if(   (isBGR(srcFormat) && isRGB(dstFormat))

  1427. 		 || (isRGB(srcFormat) && isBGR(dstFormat))){

  1428. 		switch(srcId | (dstId<<4)){

  1429. 		case 0x33: conv= rgb15tobgr15; break;

  1430. 		case 0x34: conv= rgb16tobgr15; break;

  1431. 		case 0x36: conv= rgb24tobgr15; break;

  1432. 		case 0x38: conv= rgb32tobgr15; break;

  1433. 		case 0x43: conv= rgb15tobgr16; break;

  1434. 		case 0x44: conv= rgb16tobgr16; break;

  1435. 		case 0x46: conv= rgb24tobgr16; break;

  1436. 		case 0x48: conv= rgb32tobgr16; break;

  1437. 		case 0x63: conv= rgb15tobgr24; break;

  1438. 		case 0x64: conv= rgb16tobgr24; break;

  1439. 		case 0x66: conv= rgb24tobgr24; break;

  1440. 		case 0x68: conv= rgb32tobgr24; break;

  1441. 		case 0x83: conv= rgb15tobgr32; break;

  1442. 		case 0x84: conv= rgb16tobgr32; break;

  1443. 		case 0x86: conv= rgb24tobgr32; break;

  1444. 		case 0x88: conv= rgb32tobgr32; break;

  1445. 		default: MSG_ERR("swScaler: internal error %s -> %s converter\n", 

  1446. 				 vo_format_name(srcFormat), vo_format_name(dstFormat)); break;

  1447. 		}

  1448. 	}else{

  1449. 		MSG_ERR("swScaler: internal error %s -> %s converter\n", 

  1450. 			 vo_format_name(srcFormat), vo_format_name(dstFormat));

  1451. 	}

  1452. 

  1453. 	if(dstStride[0]*srcBpp == srcStride[0]*dstBpp)

  1454. 		conv(src[0], dst[0] + dstStride[0]*srcSliceY, srcSliceH*srcStride[0]);

  1455. 	else

  1456. 	{

  1457. 		int i;

  1458. 		uint8_t *srcPtr= src[0];

  1459. 		uint8_t *dstPtr= dst[0] + dstStride[0]*srcSliceY;

  1460. 

  1461. 		for(i=0; i<srcSliceH; i++)

  1462. 		{

  1463. 			conv(srcPtr, dstPtr, c->srcW*srcBpp);

  1464. 			srcPtr+= srcStride[0];

  1465. 			dstPtr+= dstStride[0];

  1466. 		}

  1467. 	}     

  1468. 	return srcSliceH;

  1469. }

  1470. 

  1471. static int bgr24toyv12Wrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1472.              int srcSliceH, uint8_t* dst[], int dstStride[]){

  1473. 

  1474. 	rgb24toyv12(

  1475. 		src[0], 

  1476. 		dst[0]+ srcSliceY    *dstStride[0], 

  1477. 		dst[1]+(srcSliceY>>1)*dstStride[1], 

  1478. 		dst[2]+(srcSliceY>>1)*dstStride[2],

  1479. 		c->srcW, srcSliceH, 

  1480. 		dstStride[0], dstStride[1], srcStride[0]);

  1481. 	return srcSliceH;

  1482. }

  1483. 

  1484. static int yvu9toyv12Wrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1485.              int srcSliceH, uint8_t* dst[], int dstStride[]){

  1486. 	int i;

  1487. 

  1488. 	/* copy Y */

  1489. 	if(srcStride[0]==dstStride[0]) 

  1490. 		memcpy(dst[0]+ srcSliceY*dstStride[0], src[0], srcStride[0]*srcSliceH);

  1491. 	else{

  1492. 		uint8_t *srcPtr= src[0];

  1493. 		uint8_t *dstPtr= dst[0] + dstStride[0]*srcSliceY;

  1494. 

  1495. 		for(i=0; i<srcSliceH; i++)

  1496. 		{

  1497. 			memcpy(dstPtr, srcPtr, c->srcW);

  1498. 			srcPtr+= srcStride[0];

  1499. 			dstPtr+= dstStride[0];

  1500. 		}

  1501. 	}

  1502. 

  1503. 	if(c->dstFormat==IMGFMT_YV12){

  1504. 		planar2x(src[1], dst[1], c->chrSrcW, c->chrSrcH, srcStride[1], dstStride[1]);

  1505. 		planar2x(src[2], dst[2], c->chrSrcW, c->chrSrcH, srcStride[2], dstStride[2]);

  1506. 	}else{

  1507. 		planar2x(src[1], dst[2], c->chrSrcW, c->chrSrcH, srcStride[1], dstStride[2]);

  1508. 		planar2x(src[2], dst[1], c->chrSrcW, c->chrSrcH, srcStride[2], dstStride[1]);

  1509. 	}

  1510. 	return srcSliceH;

  1511. }

  1512. 

  1513. /**

  1514.  * bring pointers in YUV order instead of YVU

  1515.  */

  1516. static inline void sws_orderYUV(int format, uint8_t * sortedP[], int sortedStride[], uint8_t * p[], int stride[]){

  1517. 	if(format == IMGFMT_YV12 || format == IMGFMT_YVU9

  1518.            || format == IMGFMT_444P || format == IMGFMT_422P || format == IMGFMT_411P){

  1519. 		sortedP[0]= p[0];

  1520. 		sortedP[1]= p[2];

  1521. 		sortedP[2]= p[1];

  1522. 		sortedStride[0]= stride[0];

  1523. 		sortedStride[1]= stride[2];

  1524. 		sortedStride[2]= stride[1];

  1525. 	}

  1526. 	else if(isPacked(format) || isGray(format) || format == IMGFMT_Y8)

  1527. 	{

  1528. 		sortedP[0]= p[0];

  1529. 		sortedP[1]= 

  1530. 		sortedP[2]= NULL;

  1531. 		sortedStride[0]= stride[0];

  1532. 		sortedStride[1]= 

  1533. 		sortedStride[2]= 0;

  1534. 	}

  1535. 	else if(format == IMGFMT_I420 || format == IMGFMT_IYUV)

  1536. 	{

  1537. 		sortedP[0]= p[0];

  1538. 		sortedP[1]= p[1];

  1539. 		sortedP[2]= p[2];

  1540. 		sortedStride[0]= stride[0];

  1541. 		sortedStride[1]= stride[1];

  1542. 		sortedStride[2]= stride[2];

  1543. 	}else{

  1544. 		MSG_ERR("internal error in orderYUV\n");

  1545. 	}

  1546. }

  1547. 

  1548. /* unscaled copy like stuff (assumes nearly identical formats) */

  1549. static int simpleCopy(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1550.              int srcSliceH, uint8_t* dst[], int dstStride[]){

  1551. 

  1552. 	if(isPacked(c->srcFormat))

  1553. 	{

  1554. 		if(dstStride[0]==srcStride[0])

  1555. 			memcpy(dst[0] + dstStride[0]*srcSliceY, src[0], srcSliceH*dstStride[0]);

  1556. 		else

  1557. 		{

  1558. 			int i;

  1559. 			uint8_t *srcPtr= src[0];

  1560. 			uint8_t *dstPtr= dst[0] + dstStride[0]*srcSliceY;

  1561. 			int length=0;

  1562. 

  1563. 			/* universal length finder */

  1564. 			while(length+c->srcW <= ABS(dstStride[0]) 

  1565. 			   && length+c->srcW <= ABS(srcStride[0])) length+= c->srcW;

  1566. 			ASSERT(length!=0);

  1567. 

  1568. 			for(i=0; i<srcSliceH; i++)

  1569. 			{

  1570. 				memcpy(dstPtr, srcPtr, length);

  1571. 				srcPtr+= srcStride[0];

  1572. 				dstPtr+= dstStride[0];

  1573. 			}

  1574. 		}

  1575. 	}

  1576. 	else 

  1577. 	{ /* Planar YUV or gray */

  1578. 		int plane;

  1579. 		for(plane=0; plane<3; plane++)

  1580. 		{

  1581. 			int length= plane==0 ? c->srcW  : -((-c->srcW  )>>c->chrDstHSubSample);

  1582. 			int y=      plane==0 ? srcSliceY: -((-srcSliceY)>>c->chrDstVSubSample);

  1583. 			int height= plane==0 ? srcSliceH: -((-srcSliceH)>>c->chrDstVSubSample);

  1584. 

  1585. 			if((isGray(c->srcFormat) || isGray(c->dstFormat)) && plane>0)

  1586. 			{

  1587. 				if(!isGray(c->dstFormat))

  1588. 					memset(dst[plane], 128, dstStride[plane]*height);

  1589. 			}

  1590. 			else

  1591. 			{

  1592. 				if(dstStride[plane]==srcStride[plane])

  1593. 					memcpy(dst[plane] + dstStride[plane]*y, src[plane], height*dstStride[plane]);

  1594. 				else

  1595. 				{

  1596. 					int i;

  1597. 					uint8_t *srcPtr= src[plane];

  1598. 					uint8_t *dstPtr= dst[plane] + dstStride[plane]*y;

  1599. 					for(i=0; i<height; i++)

  1600. 					{

  1601. 						memcpy(dstPtr, srcPtr, length);

  1602. 						srcPtr+= srcStride[plane];

  1603. 						dstPtr+= dstStride[plane];

  1604. 					}

  1605. 				}

  1606. 			}

  1607. 		}

  1608. 	}

  1609. 	return srcSliceH;

  1610. }

  1611. 

  1612. static int remove_dup_fourcc(int fourcc)

  1613. {

  1614. 	switch(fourcc)

  1615. 	{

  1616. 	    case IMGFMT_I420:

  1617. 	    case IMGFMT_IYUV: return IMGFMT_YV12;

  1618. 	    case IMGFMT_Y8  : return IMGFMT_Y800;

  1619. 	    case IMGFMT_IF09: return IMGFMT_YVU9;

  1620. 	    default: return fourcc;

  1621. 	}

  1622. }

  1623. 

  1624. static void getSubSampleFactors(int *h, int *v, int format){

  1625. 	switch(format){

  1626. 	case IMGFMT_UYVY:

  1627. 	case IMGFMT_YUY2:

  1628. 		*h=1;

  1629. 		*v=0;

  1630. 		break;

  1631. 	case IMGFMT_YV12:

  1632. 	case IMGFMT_Y800: //FIXME remove after different subsamplings are fully implemented

  1633. 		*h=1;

  1634. 		*v=1;

  1635. 		break;

  1636. 	case IMGFMT_YVU9:

  1637. 		*h=2;

  1638. 		*v=2;

  1639. 		break;

  1640. 	case IMGFMT_444P:

  1641. 		*h=0;

  1642. 		*v=0;

  1643. 		break;

  1644. 	case IMGFMT_422P:

  1645. 		*h=1;

  1646. 		*v=0;

  1647. 		break;

  1648. 	case IMGFMT_411P:

  1649. 		*h=2;

  1650. 		*v=0;

  1651. 		break;

  1652. 	default:

  1653. 		*h=0;

  1654. 		*v=0;

  1655. 		break;

  1656. 	}

  1657. }

  1658. 

  1659. static uint16_t roundToInt16(int64_t f){

  1660. 	int r= (f + (1<<15))>>16;

  1661. 	     if(r<-0x7FFF) return 0x8000;

  1662. 	else if(r> 0x7FFF) return 0x7FFF;

  1663. 	else               return r;

  1664. }

  1665. 

  1666. /**

  1667.  * @param inv_table the yuv2rgb coeffs, normally Inverse_Table_6_9[x]

  1668.  * @param fullRange if 1 then the luma range is 0..255 if 0 its 16..235

  1669.  * @return -1 if not supported

  1670.  */

  1671. int sws_setColorspaceDetails(SwsContext *c, const int inv_table[4], int srcRange, const int table[4], int dstRange, int brightness, int contrast, int saturation){

  1672. 	int64_t crv =  inv_table[0];

  1673. 	int64_t cbu =  inv_table[1];

  1674. 	int64_t cgu = -inv_table[2];

  1675. 	int64_t cgv = -inv_table[3];

  1676. 	int64_t cy  = 1<<16;

  1677. 	int64_t oy  = 0;

  1678. 

  1679. 	if(isYUV(c->dstFormat) || isGray(c->dstFormat)) return -1;

  1680. 	memcpy(c->srcColorspaceTable, inv_table, sizeof(int)*4);

  1681. 	memcpy(c->dstColorspaceTable,     table, sizeof(int)*4);

  1682. 

  1683. 	c->brightness= brightness;

  1684. 	c->contrast  = contrast;

  1685. 	c->saturation= saturation;

  1686. 	c->srcRange  = srcRange;

  1687. 	c->dstRange  = dstRange;

  1688. 

  1689. 	c->uOffset=   0x0400040004000400LL;

  1690. 	c->vOffset=   0x0400040004000400LL;

  1691. 

  1692. 	if(!srcRange){

  1693. 		cy= (cy*255) / 219;

  1694. 		oy= 16<<16;

  1695. 	}

  1696. 

  1697. 	cy = (cy *contrast             )>>16;

  1698. 	crv= (crv*contrast * saturation)>>32;

  1699. 	cbu= (cbu*contrast * saturation)>>32;

  1700. 	cgu= (cgu*contrast * saturation)>>32;

  1701. 	cgv= (cgv*contrast * saturation)>>32;

  1702. 

  1703. 	oy -= 256*brightness;

  1704. 

  1705. 	c->yCoeff=    roundToInt16(cy *8192) * 0x0001000100010001ULL;

  1706. 	c->vrCoeff=   roundToInt16(crv*8192) * 0x0001000100010001ULL;

  1707. 	c->ubCoeff=   roundToInt16(cbu*8192) * 0x0001000100010001ULL;

  1708. 	c->vgCoeff=   roundToInt16(cgv*8192) * 0x0001000100010001ULL;

  1709. 	c->ugCoeff=   roundToInt16(cgu*8192) * 0x0001000100010001ULL;

  1710. 	c->yOffset=   roundToInt16(oy *   8) * 0x0001000100010001ULL;

  1711. 

  1712. 	yuv2rgb_c_init_tables(c, inv_table, srcRange, brightness, contrast, saturation);

  1713. 	//FIXME factorize

  1714. 	

  1715. 	return 0;

  1716. }

  1717. 

  1718. /**

  1719.  * @return -1 if not supported

  1720.  */

  1721. int sws_getColorspaceDetails(SwsContext *c, int **inv_table, int *srcRange, int **table, int *dstRange, int *brightness, int *contrast, int *saturation){

  1722. 	if(isYUV(c->dstFormat) || isGray(c->dstFormat)) return -1;

  1723. 

  1724. 	*inv_table = c->srcColorspaceTable;

  1725. 	*table     = c->dstColorspaceTable;

  1726. 	*srcRange  = c->srcRange;

  1727. 	*dstRange  = c->dstRange;

  1728. 	*brightness= c->brightness;

  1729. 	*contrast  = c->contrast;

  1730. 	*saturation= c->saturation;

  1731. 	

  1732. 	return 0;	

  1733. }

  1734. 

  1735. SwsContext *sws_getContext(int srcW, int srcH, int origSrcFormat, int dstW, int dstH, int origDstFormat, int flags,

  1736.                          SwsFilter *srcFilter, SwsFilter *dstFilter){

  1737. 

  1738. 	SwsContext *c;

  1739. 	int i;

  1740. 	int usesVFilter, usesHFilter;

  1741. 	int unscaled, needsDither;

  1742. 	int srcFormat, dstFormat;

  1743. 	SwsFilter dummyFilter= {NULL, NULL, NULL, NULL};

  1744. #ifdef ARCH_X86

  1745. 	if(flags & SWS_CPU_CAPS_MMX)

  1746. 		asm volatile("emms\n\t"::: "memory");

  1747. #endif

  1748. 

  1749. #ifndef RUNTIME_CPUDETECT //ensure that the flags match the compiled variant if cpudetect is off

  1750. 	flags &= ~(SWS_CPU_CAPS_MMX|SWS_CPU_CAPS_MMX2|SWS_CPU_CAPS_3DNOW|SWS_CPU_CAPS_ALTIVEC);

  1751. #ifdef HAVE_MMX2

  1752. 	flags |= SWS_CPU_CAPS_MMX|SWS_CPU_CAPS_MMX2;

  1753. #elif defined (HAVE_3DNOW)

  1754. 	flags |= SWS_CPU_CAPS_MMX|SWS_CPU_CAPS_3DNOW;

  1755. #elif defined (HAVE_MMX)

  1756. 	flags |= SWS_CPU_CAPS_MMX;

  1757. #elif defined (HAVE_ALTIVEC)

  1758. 	flags |= SWS_CPU_CAPS_ALTIVEC;

  1759. #endif

  1760. #endif

  1761. 	if(clip_table[512] != 255) globalInit();

  1762. 	if(rgb15to16 == NULL) sws_rgb2rgb_init(flags);

  1763. 

  1764. 	/* avoid duplicate Formats, so we don't need to check to much */

  1765. 	srcFormat = remove_dup_fourcc(origSrcFormat);

  1766. 	dstFormat = remove_dup_fourcc(origDstFormat);

  1767. 

  1768. 	unscaled = (srcW == dstW && srcH == dstH);

  1769. 	needsDither= (isBGR(dstFormat) || isRGB(dstFormat)) 

  1770. 		     && (dstFormat&0xFF)<24

  1771. 		     && ((dstFormat&0xFF)<(srcFormat&0xFF) || (!(isRGB(srcFormat) || isBGR(srcFormat))));

  1772. 

  1773. 	if(!isSupportedIn(srcFormat)) 

  1774. 	{

  1775. 		MSG_ERR("swScaler: %s is not supported as input format\n", vo_format_name(srcFormat));

  1776. 		return NULL;

  1777. 	}

  1778. 	if(!isSupportedOut(dstFormat))

  1779. 	{

  1780. 		MSG_ERR("swScaler: %s is not supported as output format\n", vo_format_name(dstFormat));

  1781. 		return NULL;

  1782. 	}

  1783. 

  1784. 	/* sanity check */

  1785. 	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

  1786. 	{

  1787. 		 MSG_ERR("swScaler: %dx%d -> %dx%d is invalid scaling dimension\n", 

  1788. 			srcW, srcH, dstW, dstH);

  1789. 		return NULL;

  1790. 	}

  1791. 

  1792. 	if(!dstFilter) dstFilter= &dummyFilter;

  1793. 	if(!srcFilter) srcFilter= &dummyFilter;

  1794. 

  1795. 	c= memalign(64, sizeof(SwsContext));

  1796. 	memset(c, 0, sizeof(SwsContext));

  1797. 

  1798. 	c->srcW= srcW;

  1799. 	c->srcH= srcH;

  1800. 	c->dstW= dstW;

  1801. 	c->dstH= dstH;

  1802. 	c->lumXInc= ((srcW<<16) + (dstW>>1))/dstW;

  1803. 	c->lumYInc= ((srcH<<16) + (dstH>>1))/dstH;

  1804. 	c->flags= flags;

  1805. 	c->dstFormat= dstFormat;

  1806. 	c->srcFormat= srcFormat;

  1807. 	c->origDstFormat= origDstFormat;

  1808. 	c->origSrcFormat= origSrcFormat;

  1809.         c->vRounder= 4* 0x0001000100010001ULL;

  1810. 

  1811. 	usesHFilter= usesVFilter= 0;

  1812. 	if(dstFilter->lumV!=NULL && dstFilter->lumV->length>1) usesVFilter=1;

  1813. 	if(dstFilter->lumH!=NULL && dstFilter->lumH->length>1) usesHFilter=1;

  1814. 	if(dstFilter->chrV!=NULL && dstFilter->chrV->length>1) usesVFilter=1;

  1815. 	if(dstFilter->chrH!=NULL && dstFilter->chrH->length>1) usesHFilter=1;

  1816. 	if(srcFilter->lumV!=NULL && srcFilter->lumV->length>1) usesVFilter=1;

  1817. 	if(srcFilter->lumH!=NULL && srcFilter->lumH->length>1) usesHFilter=1;

  1818. 	if(srcFilter->chrV!=NULL && srcFilter->chrV->length>1) usesVFilter=1;

  1819. 	if(srcFilter->chrH!=NULL && srcFilter->chrH->length>1) usesHFilter=1;

  1820. 

  1821. 	getSubSampleFactors(&c->chrSrcHSubSample, &c->chrSrcVSubSample, srcFormat);

  1822. 	getSubSampleFactors(&c->chrDstHSubSample, &c->chrDstVSubSample, dstFormat);

  1823. 

  1824. 	// reuse chroma for 2 pixles rgb/bgr unless user wants full chroma interpolation

  1825. 	if((isBGR(dstFormat) || isRGB(dstFormat)) && !(flags&SWS_FULL_CHR_H_INT)) c->chrDstHSubSample=1;

  1826. 

  1827. 	// drop some chroma lines if the user wants it

  1828. 	c->vChrDrop= (flags&SWS_SRC_V_CHR_DROP_MASK)>>SWS_SRC_V_CHR_DROP_SHIFT;

  1829. 	c->chrSrcVSubSample+= c->vChrDrop;

  1830. 

  1831. 	// drop every 2. pixel for chroma calculation unless user wants full chroma

  1832. 	if((isBGR(srcFormat) || isRGB(srcFormat)) && !(flags&SWS_FULL_CHR_H_INP)) 

  1833. 		c->chrSrcHSubSample=1;

  1834. 

  1835. 	c->chrIntHSubSample= c->chrDstHSubSample;

  1836. 	c->chrIntVSubSample= c->chrSrcVSubSample;

  1837. 

  1838. 	// note the -((-x)>>y) is so that we allways round toward +inf

  1839. 	c->chrSrcW= -((-srcW) >> c->chrSrcHSubSample);

  1840. 	c->chrSrcH= -((-srcH) >> c->chrSrcVSubSample);

  1841. 	c->chrDstW= -((-dstW) >> c->chrDstHSubSample);

  1842. 	c->chrDstH= -((-dstH) >> c->chrDstVSubSample);

  1843. 

  1844. 	sws_setColorspaceDetails(c, Inverse_Table_6_9[SWS_CS_DEFAULT], 0, Inverse_Table_6_9[SWS_CS_DEFAULT] /* FIXME*/, 0, 0, 1<<16, 1<<16); 

  1845. 

  1846. 	/* unscaled special Cases */

  1847. 	if(unscaled && !usesHFilter && !usesVFilter)

  1848. 	{

  1849. 		/* yv12_to_nv12 */

  1850. 		if(srcFormat == IMGFMT_YV12 && dstFormat == IMGFMT_NV12)

  1851. 		{

  1852. 			c->swScale= PlanarToNV12Wrapper;

  1853. 		}

  1854. 		/* yuv2bgr */

  1855. 		if((srcFormat==IMGFMT_YV12 || srcFormat==IMGFMT_422P) && (isBGR(dstFormat) || isRGB(dstFormat)))

  1856. 		{

  1857. 			c->swScale= yuv2rgb_get_func_ptr(c);

  1858. 		}

  1859. 		

  1860. 		if( srcFormat==IMGFMT_YVU9 && dstFormat==IMGFMT_YV12 )

  1861. 		{

  1862. 			c->swScale= yvu9toyv12Wrapper;

  1863. 		}

  1864. 

  1865. 		/* bgr24toYV12 */

  1866. 		if(srcFormat==IMGFMT_BGR24 && dstFormat==IMGFMT_YV12)

  1867. 			c->swScale= bgr24toyv12Wrapper;

  1868. 		

  1869. 		/* rgb/bgr -> rgb/bgr (no dither needed forms) */

  1870. 		if(   (isBGR(srcFormat) || isRGB(srcFormat))

  1871. 		   && (isBGR(dstFormat) || isRGB(dstFormat)) 

  1872. 		   && !needsDither)

  1873. 			c->swScale= rgb2rgbWrapper;

  1874. 

  1875. 		/* LQ converters if -sws 0 or -sws 4*/

  1876. 		if(c->flags&(SWS_FAST_BILINEAR|SWS_POINT)){

  1877. 			/* rgb/bgr -> rgb/bgr (dither needed forms) */

  1878. 			if(  (isBGR(srcFormat) || isRGB(srcFormat))

  1879. 			  && (isBGR(dstFormat) || isRGB(dstFormat)) 

  1880. 			  && needsDither)

  1881. 				c->swScale= rgb2rgbWrapper;

  1882. 

  1883. 			/* yv12_to_yuy2 */

  1884. 			if(srcFormat == IMGFMT_YV12 && 

  1885. 			    (dstFormat == IMGFMT_YUY2 || dstFormat == IMGFMT_UYVY))

  1886. 			{

  1887. 				if (dstFormat == IMGFMT_YUY2)

  1888. 				    c->swScale= PlanarToYuy2Wrapper;

  1889. 				else

  1890. 				    c->swScale= PlanarToUyvyWrapper;

  1891. 			}

  1892. 		}

  1893. 

  1894. 		/* simple copy */

  1895. 		if(   srcFormat == dstFormat

  1896. 		   || (isPlanarYUV(srcFormat) && isGray(dstFormat))

  1897. 		   || (isPlanarYUV(dstFormat) && isGray(srcFormat))

  1898. 		  )

  1899. 		{

  1900. 			c->swScale= simpleCopy;

  1901. 		}

  1902. 

  1903. 		if(c->swScale){

  1904. 			if(flags&SWS_PRINT_INFO)

  1905. 				MSG_INFO("SwScaler: using unscaled %s -> %s special converter\n", 

  1906. 					vo_format_name(srcFormat), vo_format_name(dstFormat));

  1907. 			return c;

  1908. 		}

  1909. 	}

  1910. 

  1911. 	if(flags & SWS_CPU_CAPS_MMX2)

  1912. 	{

  1913. 		c->canMMX2BeUsed= (dstW >=srcW && (dstW&31)==0 && (srcW&15)==0) ? 1 : 0;

  1914. 		if(!c->canMMX2BeUsed && dstW >=srcW && (srcW&15)==0 && (flags&SWS_FAST_BILINEAR))

  1915. 		{

  1916. 			if(flags&SWS_PRINT_INFO)

  1917. 				MSG_INFO("SwScaler: output Width is not a multiple of 32 -> no MMX2 scaler\n");

  1918. 		}

  1919. 		if(usesHFilter) c->canMMX2BeUsed=0;

  1920. 	}

  1921. 	else

  1922. 		c->canMMX2BeUsed=0;

  1923. 

  1924. 	c->chrXInc= ((c->chrSrcW<<16) + (c->chrDstW>>1))/c->chrDstW;

  1925. 	c->chrYInc= ((c->chrSrcH<<16) + (c->chrDstH>>1))/c->chrDstH;

  1926. 

  1927. 	// match pixel 0 of the src to pixel 0 of dst and match pixel n-2 of src to pixel n-2 of dst

  1928. 	// but only for the FAST_BILINEAR mode otherwise do correct scaling

  1929. 	// n-2 is the last chrominance sample available

  1930. 	// this is not perfect, but noone shuld notice the difference, the more correct variant

  1931. 	// would be like the vertical one, but that would require some special code for the

  1932. 	// first and last pixel

  1933. 	if(flags&SWS_FAST_BILINEAR)

  1934. 	{

  1935. 		if(c->canMMX2BeUsed)

  1936. 		{

  1937. 			c->lumXInc+= 20;

  1938. 			c->chrXInc+= 20;

  1939. 		}

  1940. 		//we don't use the x86asm scaler if mmx is available

  1941. 		else if(flags & SWS_CPU_CAPS_MMX)

  1942. 		{

  1943. 			c->lumXInc = ((srcW-2)<<16)/(dstW-2) - 20;

  1944. 			c->chrXInc = ((c->chrSrcW-2)<<16)/(c->chrDstW-2) - 20;

  1945. 		}

  1946. 	}

  1947. 

  1948. 	/* precalculate horizontal scaler filter coefficients */

  1949. 	{

  1950. 		const int filterAlign= (flags & SWS_CPU_CAPS_MMX) ? 4 : 1;

  1951. 

  1952. 		initFilter(&c->hLumFilter, &c->hLumFilterPos, &c->hLumFilterSize, c->lumXInc,

  1953. 				 srcW      ,       dstW, filterAlign, 1<<14,

  1954. 				 (flags&SWS_BICUBLIN) ? (flags|SWS_BICUBIC)  : flags,

  1955. 				 srcFilter->lumH, dstFilter->lumH);

  1956. 		initFilter(&c->hChrFilter, &c->hChrFilterPos, &c->hChrFilterSize, c->chrXInc,

  1957. 				 c->chrSrcW, c->chrDstW, filterAlign, 1<<14,

  1958. 				 (flags&SWS_BICUBLIN) ? (flags|SWS_BILINEAR) : flags,

  1959. 				 srcFilter->chrH, dstFilter->chrH);

  1960. 

  1961. #ifdef ARCH_X86

  1962. // can't downscale !!!

  1963. 		if(c->canMMX2BeUsed && (flags & SWS_FAST_BILINEAR))

  1964. 		{

  1965. 			c->lumMmx2Filter   = (int16_t*)memalign(8, (dstW        /8+8)*sizeof(int16_t));

  1966. 			c->chrMmx2Filter   = (int16_t*)memalign(8, (c->chrDstW  /4+8)*sizeof(int16_t));

  1967. 			c->lumMmx2FilterPos= (int32_t*)memalign(8, (dstW      /2/8+8)*sizeof(int32_t));

  1968. 			c->chrMmx2FilterPos= (int32_t*)memalign(8, (c->chrDstW/2/4+8)*sizeof(int32_t));

  1969. 

  1970. 			initMMX2HScaler(      dstW, c->lumXInc, c->funnyYCode , c->lumMmx2Filter, c->lumMmx2FilterPos, 8);

  1971. 			initMMX2HScaler(c->chrDstW, c->chrXInc, c->funnyUVCode, c->chrMmx2Filter, c->chrMmx2FilterPos, 4);

  1972. 		}

  1973. #endif

  1974. 	} // Init Horizontal stuff

  1975. 

  1976. 

  1977. 

  1978. 	/* precalculate vertical scaler filter coefficients */

  1979. 	initFilter(&c->vLumFilter, &c->vLumFilterPos, &c->vLumFilterSize, c->lumYInc,

  1980. 			srcH      ,        dstH, 1, (1<<12)-4,

  1981. 			(flags&SWS_BICUBLIN) ? (flags|SWS_BICUBIC)  : flags,

  1982. 			srcFilter->lumV, dstFilter->lumV);

  1983. 	initFilter(&c->vChrFilter, &c->vChrFilterPos, &c->vChrFilterSize, c->chrYInc,

  1984. 			c->chrSrcH, c->chrDstH, 1, (1<<12)-4,

  1985. 			(flags&SWS_BICUBLIN) ? (flags|SWS_BILINEAR) : flags,

  1986. 			srcFilter->chrV, dstFilter->chrV);

  1987. 

  1988. 	// Calculate Buffer Sizes so that they won't run out while handling these damn slices

  1989. 	c->vLumBufSize= c->vLumFilterSize;

  1990. 	c->vChrBufSize= c->vChrFilterSize;

  1991. 	for(i=0; i<dstH; i++)

  1992. 	{

  1993. 		int chrI= i*c->chrDstH / dstH;

  1994. 		int nextSlice= MAX(c->vLumFilterPos[i   ] + c->vLumFilterSize - 1,

  1995. 				 ((c->vChrFilterPos[chrI] + c->vChrFilterSize - 1)<<c->chrSrcVSubSample));

  1996. 

  1997. 		nextSlice>>= c->chrSrcVSubSample;

  1998. 		nextSlice<<= c->chrSrcVSubSample;

  1999. 		if(c->vLumFilterPos[i   ] + c->vLumBufSize < nextSlice)

  2000. 			c->vLumBufSize= nextSlice - c->vLumFilterPos[i   ];

  2001. 		if(c->vChrFilterPos[chrI] + c->vChrBufSize < (nextSlice>>c->chrSrcVSubSample))

  2002. 			c->vChrBufSize= (nextSlice>>c->chrSrcVSubSample) - c->vChrFilterPos[chrI];

  2003. 	}

  2004. 

  2005. 	// allocate pixbufs (we use dynamic allocation because otherwise we would need to

  2006. 	c->lumPixBuf= (int16_t**)memalign(4, c->vLumBufSize*2*sizeof(int16_t*));

  2007. 	c->chrPixBuf= (int16_t**)memalign(4, c->vChrBufSize*2*sizeof(int16_t*));

  2008. 	//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)

  2009. 	for(i=0; i<c->vLumBufSize; i++)

  2010. 		c->lumPixBuf[i]= c->lumPixBuf[i+c->vLumBufSize]= (uint16_t*)memalign(8, 4000);

  2011. 	for(i=0; i<c->vChrBufSize; i++)

  2012. 		c->chrPixBuf[i]= c->chrPixBuf[i+c->vChrBufSize]= (uint16_t*)memalign(8, 8000);

  2013. 

  2014. 	//try to avoid drawing green stuff between the right end and the stride end

  2015. 	for(i=0; i<c->vLumBufSize; i++) memset(c->lumPixBuf[i], 0, 4000);

  2016. 	for(i=0; i<c->vChrBufSize; i++) memset(c->chrPixBuf[i], 64, 8000);

  2017. 

  2018. 	ASSERT(c->chrDstH <= dstH)

  2019. 

  2020. 	if(flags&SWS_PRINT_INFO)

  2021. 	{

  2022. #ifdef DITHER1XBPP

  2023. 		char *dither= " dithered";

  2024. #else

  2025. 		char *dither= "";

  2026. #endif

  2027. 		if(flags&SWS_FAST_BILINEAR)

  2028. 			MSG_INFO("\nSwScaler: FAST_BILINEAR scaler, ");

  2029. 		else if(flags&SWS_BILINEAR)

  2030. 			MSG_INFO("\nSwScaler: BILINEAR scaler, ");

  2031. 		else if(flags&SWS_BICUBIC)

  2032. 			MSG_INFO("\nSwScaler: BICUBIC scaler, ");

  2033. 		else if(flags&SWS_X)

  2034. 			MSG_INFO("\nSwScaler: Experimental scaler, ");

  2035. 		else if(flags&SWS_POINT)

  2036. 			MSG_INFO("\nSwScaler: Nearest Neighbor / POINT scaler, ");

  2037. 		else if(flags&SWS_AREA)

  2038. 			MSG_INFO("\nSwScaler: Area Averageing scaler, ");

  2039. 		else if(flags&SWS_BICUBLIN)

  2040. 			MSG_INFO("\nSwScaler: luma BICUBIC / chroma BILINEAR scaler, ");

  2041. 		else if(flags&SWS_GAUSS)

  2042. 			MSG_INFO("\nSwScaler: Gaussian scaler, ");

  2043. 		else if(flags&SWS_SINC)

  2044. 			MSG_INFO("\nSwScaler: Sinc scaler, ");

  2045. 		else if(flags&SWS_LANCZOS)

  2046. 			MSG_INFO("\nSwScaler: Lanczos scaler, ");

  2047. 		else if(flags&SWS_SPLINE)

  2048. 			MSG_INFO("\nSwScaler: Bicubic spline scaler, ");

  2049. 		else

  2050. 			MSG_INFO("\nSwScaler: ehh flags invalid?! ");

  2051. 

  2052. 		if(dstFormat==IMGFMT_BGR15 || dstFormat==IMGFMT_BGR16)

  2053. 			MSG_INFO("from %s to%s %s ", 

  2054. 				vo_format_name(srcFormat), dither, vo_format_name(dstFormat));

  2055. 		else

  2056. 			MSG_INFO("from %s to %s ", 

  2057. 				vo_format_name(srcFormat), vo_format_name(dstFormat));

  2058. 

  2059. 		if(flags & SWS_CPU_CAPS_MMX2)

  2060. 			MSG_INFO("using MMX2\n");

  2061. 		else if(flags & SWS_CPU_CAPS_3DNOW)

  2062. 			MSG_INFO("using 3DNOW\n");

  2063. 		else if(flags & SWS_CPU_CAPS_MMX)

  2064. 			MSG_INFO("using MMX\n");

  2065. 		else if(flags & SWS_CPU_CAPS_ALTIVEC)

  2066. 			MSG_INFO("using AltiVec\n");

  2067. 		else 

  2068. 			MSG_INFO("using C\n");

  2069. 	}

  2070. 

  2071. 	if(flags & SWS_PRINT_INFO)

  2072. 	{

  2073. 		if(flags & SWS_CPU_CAPS_MMX)

  2074. 		{

  2075. 			if(c->canMMX2BeUsed && (flags&SWS_FAST_BILINEAR))

  2076. 				MSG_V("SwScaler: using FAST_BILINEAR MMX2 scaler for horizontal scaling\n");

  2077. 			else

  2078. 			{

  2079. 				if(c->hLumFilterSize==4)

  2080. 					MSG_V("SwScaler: using 4-tap MMX scaler for horizontal luminance scaling\n");

  2081. 				else if(c->hLumFilterSize==8)

  2082. 					MSG_V("SwScaler: using 8-tap MMX scaler for horizontal luminance scaling\n");

  2083. 				else

  2084. 					MSG_V("SwScaler: using n-tap MMX scaler for horizontal luminance scaling\n");

  2085. 

  2086. 				if(c->hChrFilterSize==4)

  2087. 					MSG_V("SwScaler: using 4-tap MMX scaler for horizontal chrominance scaling\n");

  2088. 				else if(c->hChrFilterSize==8)

  2089. 					MSG_V("SwScaler: using 8-tap MMX scaler for horizontal chrominance scaling\n");

  2090. 				else

  2091. 					MSG_V("SwScaler: using n-tap MMX scaler for horizontal chrominance scaling\n");

  2092. 			}

  2093. 		}

  2094. 		else

  2095. 		{

  2096. #ifdef ARCH_X86

  2097. 			MSG_V("SwScaler: using X86-Asm scaler for horizontal scaling\n");

  2098. #else

  2099. 			if(flags & SWS_FAST_BILINEAR)

  2100. 				MSG_V("SwScaler: using FAST_BILINEAR C scaler for horizontal scaling\n");

  2101. 			else

  2102. 				MSG_V("SwScaler: using C scaler for horizontal scaling\n");

  2103. #endif

  2104. 		}

  2105. 		if(isPlanarYUV(dstFormat))

  2106. 		{

  2107. 			if(c->vLumFilterSize==1)

  2108. 				MSG_V("SwScaler: using 1-tap %s \"scaler\" for vertical scaling (YV12 like)\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");

  2109. 			else

  2110. 				MSG_V("SwScaler: using n-tap %s scaler for vertical scaling (YV12 like)\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");

  2111. 		}

  2112. 		else

  2113. 		{

  2114. 			if(c->vLumFilterSize==1 && c->vChrFilterSize==2)

  2115. 				MSG_V("SwScaler: using 1-tap %s \"scaler\" for vertical luminance scaling (BGR)\n"

  2116. 				       "SwScaler:       2-tap scaler for vertical chrominance scaling (BGR)\n",(flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");

  2117. 			else if(c->vLumFilterSize==2 && c->vChrFilterSize==2)

  2118. 				MSG_V("SwScaler: using 2-tap linear %s scaler for vertical scaling (BGR)\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");

  2119. 			else

  2120. 				MSG_V("SwScaler: using n-tap %s scaler for vertical scaling (BGR)\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");

  2121. 		}

  2122. 

  2123. 		if(dstFormat==IMGFMT_BGR24)

  2124. 			MSG_V("SwScaler: using %s YV12->BGR24 Converter\n",

  2125. 				(flags & SWS_CPU_CAPS_MMX2) ? "MMX2" : ((flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C"));

  2126. 		else if(dstFormat==IMGFMT_BGR32)

  2127. 			MSG_V("SwScaler: using %s YV12->BGR32 Converter\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");

  2128. 		else if(dstFormat==IMGFMT_BGR16)

  2129. 			MSG_V("SwScaler: using %s YV12->BGR16 Converter\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");

  2130. 		else if(dstFormat==IMGFMT_BGR15)

  2131. 			MSG_V("SwScaler: using %s YV12->BGR15 Converter\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");

  2132. 

  2133. 		MSG_V("SwScaler: %dx%d -> %dx%d\n", srcW, srcH, dstW, dstH);

  2134. 	}

  2135. 	if(flags & SWS_PRINT_INFO)

  2136. 	{

  2137. 		MSG_DBG2("SwScaler:Lum srcW=%d srcH=%d dstW=%d dstH=%d xInc=%d yInc=%d\n",

  2138. 			c->srcW, c->srcH, c->dstW, c->dstH, c->lumXInc, c->lumYInc);

  2139. 		MSG_DBG2("SwScaler:Chr srcW=%d srcH=%d dstW=%d dstH=%d xInc=%d yInc=%d\n",

  2140. 			c->chrSrcW, c->chrSrcH, c->chrDstW, c->chrDstH, c->chrXInc, c->chrYInc);

  2141. 	}

  2142. 

  2143. 	c->swScale= getSwsFunc(flags);

  2144. 	return c;

  2145. }

  2146. 

  2147. /**

  2148.  * swscale warper, so we don't need to export the SwsContext.

  2149.  * assumes planar YUV to be in YUV order instead of YVU

  2150.  */

  2151. int sws_scale_ordered(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  2152.                            int srcSliceH, uint8_t* dst[], int dstStride[]){

  2153. 	//copy strides, so they can safely be modified

  2154. 	int srcStride2[3]= {srcStride[0], srcStride[1], srcStride[2]};

  2155. 	int dstStride2[3]= {dstStride[0], dstStride[1], dstStride[2]};

  2156. 	return c->swScale(c, src, srcStride2, srcSliceY, srcSliceH, dst, dstStride2);

  2157. }

  2158. 

  2159. /**

  2160.  * swscale warper, so we don't need to export the SwsContext

  2161.  */

  2162. int sws_scale(SwsContext *c, uint8_t* srcParam[], int srcStrideParam[], int srcSliceY,

  2163.                            int srcSliceH, uint8_t* dstParam[], int dstStrideParam[]){

  2164. 	int srcStride[3];

  2165. 	int dstStride[3];

  2166. 	uint8_t *src[3];

  2167. 	uint8_t *dst[3];

  2168. 	sws_orderYUV(c->origSrcFormat, src, srcStride, srcParam, srcStrideParam);

  2169. 	sws_orderYUV(c->origDstFormat, dst, dstStride, dstParam, dstStrideParam);

  2170. //printf("sws: slice %d %d\n", srcSliceY, srcSliceH);

  2171. 

  2172. 	return c->swScale(c, src, srcStride, srcSliceY, srcSliceH, dst, dstStride);

  2173. }

  2174. 

  2175. SwsFilter *sws_getDefaultFilter(float lumaGBlur, float chromaGBlur, 

  2176. 				float lumaSharpen, float chromaSharpen,

  2177. 				float chromaHShift, float chromaVShift,

  2178. 				int verbose)

  2179. {

  2180. 	SwsFilter *filter= malloc(sizeof(SwsFilter));

  2181. 

  2182. 	if(lumaGBlur!=0.0){

  2183. 		filter->lumH= sws_getGaussianVec(lumaGBlur, 3.0);

  2184. 		filter->lumV= sws_getGaussianVec(lumaGBlur, 3.0);

  2185. 	}else{

  2186. 		filter->lumH= sws_getIdentityVec();

  2187. 		filter->lumV= sws_getIdentityVec();

  2188. 	}

  2189. 

  2190. 	if(chromaGBlur!=0.0){

  2191. 		filter->chrH= sws_getGaussianVec(chromaGBlur, 3.0);

  2192. 		filter->chrV= sws_getGaussianVec(chromaGBlur, 3.0);

  2193. 	}else{

  2194. 		filter->chrH= sws_getIdentityVec();

  2195. 		filter->chrV= sws_getIdentityVec();

  2196. 	}

  2197. 

  2198. 	if(chromaSharpen!=0.0){

  2199. 		SwsVector *g= sws_getConstVec(-1.0, 3);

  2200. 		SwsVector *id= sws_getConstVec(10.0/chromaSharpen, 1);

  2201. 		g->coeff[1]=2.0;

  2202. 		sws_addVec(id, g);

  2203. 		sws_convVec(filter->chrH, id);

  2204. 		sws_convVec(filter->chrV, id);

  2205. 		sws_freeVec(g);

  2206. 		sws_freeVec(id);

  2207. 	}

  2208. 

  2209. 	if(lumaSharpen!=0.0){

  2210. 		SwsVector *g= sws_getConstVec(-1.0, 3);

  2211. 		SwsVector *id= sws_getConstVec(10.0/lumaSharpen, 1);

  2212. 		g->coeff[1]=2.0;

  2213. 		sws_addVec(id, g);

  2214. 		sws_convVec(filter->lumH, id);

  2215. 		sws_convVec(filter->lumV, id);

  2216. 		sws_freeVec(g);

  2217. 		sws_freeVec(id);

  2218. 	}

  2219. 

  2220. 	if(chromaHShift != 0.0)

  2221. 		sws_shiftVec(filter->chrH, (int)(chromaHShift+0.5));

  2222. 

  2223. 	if(chromaVShift != 0.0)

  2224. 		sws_shiftVec(filter->chrV, (int)(chromaVShift+0.5));

  2225. 

  2226. 	sws_normalizeVec(filter->chrH, 1.0);

  2227. 	sws_normalizeVec(filter->chrV, 1.0);

  2228. 	sws_normalizeVec(filter->lumH, 1.0);

  2229. 	sws_normalizeVec(filter->lumV, 1.0);

  2230. 

  2231. 	if(verbose) sws_printVec(filter->chrH);

  2232. 	if(verbose) sws_printVec(filter->lumH);

  2233. 

  2234.         return filter;

  2235. }

  2236. 

  2237. /**

  2238.  * returns a normalized gaussian curve used to filter stuff

  2239.  * quality=3 is high quality, lowwer is lowwer quality

  2240.  */

  2241. SwsVector *sws_getGaussianVec(double variance, double quality){

  2242. 	const int length= (int)(variance*quality + 0.5) | 1;

  2243. 	int i;

  2244. 	double *coeff= memalign(sizeof(double), length*sizeof(double));

  2245. 	double middle= (length-1)*0.5;

  2246. 	SwsVector *vec= malloc(sizeof(SwsVector));

  2247. 

  2248. 	vec->coeff= coeff;

  2249. 	vec->length= length;

  2250. 

  2251. 	for(i=0; i<length; i++)

  2252. 	{

  2253. 		double dist= i-middle;

  2254. 		coeff[i]= exp( -dist*dist/(2*variance*variance) ) / sqrt(2*variance*PI);

  2255. 	}

  2256. 

  2257. 	sws_normalizeVec(vec, 1.0);

  2258. 

  2259. 	return vec;

  2260. }

  2261. 

  2262. SwsVector *sws_getConstVec(double c, int length){

  2263. 	int i;

  2264. 	double *coeff= memalign(sizeof(double), length*sizeof(double));

  2265. 	SwsVector *vec= malloc(sizeof(SwsVector));

  2266. 

  2267. 	vec->coeff= coeff;

  2268. 	vec->length= length;

  2269. 

  2270. 	for(i=0; i<length; i++)

  2271. 		coeff[i]= c;

  2272. 

  2273. 	return vec;

  2274. }

  2275. 

  2276. 

  2277. SwsVector *sws_getIdentityVec(void){

  2278. 	double *coeff= memalign(sizeof(double), sizeof(double));

  2279. 	SwsVector *vec= malloc(sizeof(SwsVector));

  2280. 	coeff[0]= 1.0;

  2281. 

  2282. 	vec->coeff= coeff;

  2283. 	vec->length= 1;

  2284. 

  2285. 	return vec;

  2286. }

  2287. 

  2288. void sws_normalizeVec(SwsVector *a, double height){

  2289. 	int i;

  2290. 	double sum=0;

  2291. 	double inv;

  2292. 

  2293. 	for(i=0; i<a->length; i++)

  2294. 		sum+= a->coeff[i];

  2295. 

  2296. 	inv= height/sum;

  2297. 

  2298. 	for(i=0; i<a->length; i++)

  2299. 		a->coeff[i]*= inv;

  2300. }

  2301. 

  2302. void sws_scaleVec(SwsVector *a, double scalar){

  2303. 	int i;

  2304. 

  2305. 	for(i=0; i<a->length; i++)

  2306. 		a->coeff[i]*= scalar;

  2307. }

  2308. 

  2309. static SwsVector *sws_getConvVec(SwsVector *a, SwsVector *b){

  2310. 	int length= a->length + b->length - 1;

  2311. 	double *coeff= memalign(sizeof(double), length*sizeof(double));

  2312. 	int i, j;

  2313. 	SwsVector *vec= malloc(sizeof(SwsVector));

  2314. 

  2315. 	vec->coeff= coeff;

  2316. 	vec->length= length;

  2317. 

  2318. 	for(i=0; i<length; i++) coeff[i]= 0.0;

  2319. 

  2320. 	for(i=0; i<a->length; i++)

  2321. 	{

  2322. 		for(j=0; j<b->length; j++)

  2323. 		{

  2324. 			coeff[i+j]+= a->coeff[i]*b->coeff[j];

  2325. 		}

  2326. 	}

  2327. 

  2328. 	return vec;

  2329. }

  2330. 

  2331. static SwsVector *sws_sumVec(SwsVector *a, SwsVector *b){

  2332. 	int length= MAX(a->length, b->length);

  2333. 	double *coeff= memalign(sizeof(double), length*sizeof(double));

  2334. 	int i;

  2335. 	SwsVector *vec= malloc(sizeof(SwsVector));

  2336. 

  2337. 	vec->coeff= coeff;

  2338. 	vec->length= length;

  2339. 

  2340. 	for(i=0; i<length; i++) coeff[i]= 0.0;

  2341. 

  2342. 	for(i=0; i<a->length; i++) coeff[i + (length-1)/2 - (a->length-1)/2]+= a->coeff[i];

  2343. 	for(i=0; i<b->length; i++) coeff[i + (length-1)/2 - (b->length-1)/2]+= b->coeff[i];

  2344. 

  2345. 	return vec;

  2346. }

  2347. 

  2348. static SwsVector *sws_diffVec(SwsVector *a, SwsVector *b){

  2349. 	int length= MAX(a->length, b->length);

  2350. 	double *coeff= memalign(sizeof(double), length*sizeof(double));

  2351. 	int i;

  2352. 	SwsVector *vec= malloc(sizeof(SwsVector));

  2353. 

  2354. 	vec->coeff= coeff;

  2355. 	vec->length= length;

  2356. 

  2357. 	for(i=0; i<length; i++) coeff[i]= 0.0;

  2358. 

  2359. 	for(i=0; i<a->length; i++) coeff[i + (length-1)/2 - (a->length-1)/2]+= a->coeff[i];

  2360. 	for(i=0; i<b->length; i++) coeff[i + (length-1)/2 - (b->length-1)/2]-= b->coeff[i];

  2361. 

  2362. 	return vec;

  2363. }

  2364. 

  2365. /* shift left / or right if "shift" is negative */

  2366. static SwsVector *sws_getShiftedVec(SwsVector *a, int shift){

  2367. 	int length= a->length + ABS(shift)*2;

  2368. 	double *coeff= memalign(sizeof(double), length*sizeof(double));

  2369. 	int i;

  2370. 	SwsVector *vec= malloc(sizeof(SwsVector));

  2371. 

  2372. 	vec->coeff= coeff;

  2373. 	vec->length= length;

  2374. 

  2375. 	for(i=0; i<length; i++) coeff[i]= 0.0;

  2376. 

  2377. 	for(i=0; i<a->length; i++)

  2378. 	{

  2379. 		coeff[i + (length-1)/2 - (a->length-1)/2 - shift]= a->coeff[i];

  2380. 	}

  2381. 

  2382. 	return vec;

  2383. }

  2384. 

  2385. void sws_shiftVec(SwsVector *a, int shift){

  2386. 	SwsVector *shifted= sws_getShiftedVec(a, shift);

  2387. 	free(a->coeff);

  2388. 	a->coeff= shifted->coeff;

  2389. 	a->length= shifted->length;

  2390. 	free(shifted);

  2391. }

  2392. 

  2393. void sws_addVec(SwsVector *a, SwsVector *b){

  2394. 	SwsVector *sum= sws_sumVec(a, b);

  2395. 	free(a->coeff);

  2396. 	a->coeff= sum->coeff;

  2397. 	a->length= sum->length;

  2398. 	free(sum);

  2399. }

  2400. 

  2401. void sws_subVec(SwsVector *a, SwsVector *b){

  2402. 	SwsVector *diff= sws_diffVec(a, b);

  2403. 	free(a->coeff);

  2404. 	a->coeff= diff->coeff;

  2405. 	a->length= diff->length;

  2406. 	free(diff);

  2407. }

  2408. 

  2409. void sws_convVec(SwsVector *a, SwsVector *b){

  2410. 	SwsVector *conv= sws_getConvVec(a, b);

  2411. 	free(a->coeff);  

  2412. 	a->coeff= conv->coeff;

  2413. 	a->length= conv->length;

  2414. 	free(conv);

  2415. }

  2416. 

  2417. SwsVector *sws_cloneVec(SwsVector *a){

  2418. 	double *coeff= memalign(sizeof(double), a->length*sizeof(double));

  2419. 	int i;

  2420. 	SwsVector *vec= malloc(sizeof(SwsVector));

  2421. 

  2422. 	vec->coeff= coeff;

  2423. 	vec->length= a->length;

  2424. 

  2425. 	for(i=0; i<a->length; i++) coeff[i]= a->coeff[i];

  2426. 

  2427. 	return vec;

  2428. }

  2429. 

  2430. void sws_printVec(SwsVector *a){

  2431. 	int i;

  2432. 	double max=0;

  2433. 	double min=0;

  2434. 	double range;

  2435. 

  2436. 	for(i=0; i<a->length; i++)

  2437. 		if(a->coeff[i]>max) max= a->coeff[i];

  2438. 

  2439. 	for(i=0; i<a->length; i++)

  2440. 		if(a->coeff[i]<min) min= a->coeff[i];

  2441. 

  2442. 	range= max - min;

  2443. 

  2444. 	for(i=0; i<a->length; i++)

  2445. 	{

  2446. 		int x= (int)((a->coeff[i]-min)*60.0/range +0.5);

  2447. 		MSG_DBG2("%1.3f ", a->coeff[i]);

  2448. 		for(;x>0; x--) MSG_DBG2(" ");

  2449. 		MSG_DBG2("|\n");

  2450. 	}

  2451. }

  2452. 

  2453. void sws_freeVec(SwsVector *a){

  2454. 	if(!a) return;

  2455. 	if(a->coeff) free(a->coeff);

  2456. 	a->coeff=NULL;

  2457. 	a->length=0;

  2458. 	free(a);

  2459. }

  2460. 

  2461. void sws_freeFilter(SwsFilter *filter){

  2462. 	if(!filter) return;

  2463. 

  2464. 	if(filter->lumH) sws_freeVec(filter->lumH);

  2465. 	if(filter->lumV) sws_freeVec(filter->lumV);

  2466. 	if(filter->chrH) sws_freeVec(filter->chrH);

  2467. 	if(filter->chrV) sws_freeVec(filter->chrV);

  2468. 	free(filter);

  2469. }

  2470. 

  2471. 

  2472. void sws_freeContext(SwsContext *c){

  2473. 	int i;

  2474. 	if(!c) return;

  2475. 

  2476. 	if(c->lumPixBuf)

  2477. 	{

  2478. 		for(i=0; i<c->vLumBufSize; i++)

  2479. 		{

  2480. 			if(c->lumPixBuf[i]) free(c->lumPixBuf[i]);

  2481. 			c->lumPixBuf[i]=NULL;

  2482. 		}

  2483. 		free(c->lumPixBuf);

  2484. 		c->lumPixBuf=NULL;

  2485. 	}

  2486. 

  2487. 	if(c->chrPixBuf)

  2488. 	{

  2489. 		for(i=0; i<c->vChrBufSize; i++)

  2490. 		{

  2491. 			if(c->chrPixBuf[i]) free(c->chrPixBuf[i]);

  2492. 			c->chrPixBuf[i]=NULL;

  2493. 		}

  2494. 		free(c->chrPixBuf);

  2495. 		c->chrPixBuf=NULL;

  2496. 	}

  2497. 

  2498. 	if(c->vLumFilter) free(c->vLumFilter);

  2499. 	c->vLumFilter = NULL;

  2500. 	if(c->vChrFilter) free(c->vChrFilter);

  2501. 	c->vChrFilter = NULL;

  2502. 	if(c->hLumFilter) free(c->hLumFilter);

  2503. 	c->hLumFilter = NULL;

  2504. 	if(c->hChrFilter) free(c->hChrFilter);

  2505. 	c->hChrFilter = NULL;

  2506. 

  2507. 	if(c->vLumFilterPos) free(c->vLumFilterPos);

  2508. 	c->vLumFilterPos = NULL;

  2509. 	if(c->vChrFilterPos) free(c->vChrFilterPos);

  2510. 	c->vChrFilterPos = NULL;

  2511. 	if(c->hLumFilterPos) free(c->hLumFilterPos);

  2512. 	c->hLumFilterPos = NULL;

  2513. 	if(c->hChrFilterPos) free(c->hChrFilterPos);

  2514. 	c->hChrFilterPos = NULL;

  2515. 

  2516. 	if(c->lumMmx2Filter) free(c->lumMmx2Filter);

  2517. 	c->lumMmx2Filter=NULL;

  2518. 	if(c->chrMmx2Filter) free(c->chrMmx2Filter);

  2519. 	c->chrMmx2Filter=NULL;

  2520. 	if(c->lumMmx2FilterPos) free(c->lumMmx2FilterPos);

  2521. 	c->lumMmx2FilterPos=NULL;

  2522. 	if(c->chrMmx2FilterPos) free(c->chrMmx2FilterPos);

  2523. 	c->chrMmx2FilterPos=NULL;

  2524. 	if(c->yuvTable) free(c->yuvTable);

  2525. 	c->yuvTable=NULL;

  2526. 

  2527. 	free(c);

  2528. }