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FFmpeg/postproc/swscale.c

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  1. /*

  2.     Copyright (C) 2001-2002 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, BGR32, BGR24, BGR16, BGR15, RGB32, RGB24, Y8, Y800

  21.   supported output formats: YV12, I420, IYUV, BGR15, BGR16, BGR24, BGR32 (grayscale soon too)

  22.   BGR15/16 support dithering

  23.   

  24.   unscaled special converters

  25.   YV12/I420/IYUV -> BGR15/BGR16/BGR24/BGR32

  26.   YV12/I420/IYUV -> YV12/I420/IYUV

  27.   YUY2/BGR15/BGR16/BGR24/BGR32/RGB24/RGB32 -> same format

  28.   BGR24 -> BGR32 & RGB24 -> RGB32

  29.   BGR32 -> BGR24 & RGB32 -> RGB24

  30.   BGR15 -> BGR16

  31. */

  32. 

  33. /* 

  34. tested special converters

  35.  YV12/I420 -> BGR16

  36.  YV12 -> YV12

  37.  BGR15 -> BGR16

  38.  BGR16 -> BGR16

  39. 

  40. untested special converters

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

  42.   YV12/I420 -> YV12/I420

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

  44.   BGR24 -> BGR32 & RGB24 -> RGB32

  45.   BGR32 -> BGR24 & RGB32 -> RGB24

  46.   BGR24 -> YV12

  47. */

  48. 

  49. #include <inttypes.h>

  50. #include <string.h>

  51. #include <math.h>

  52. #include <stdio.h>

  53. #include "../config.h"

  54. #include "../mangle.h"

  55. #include <assert.h>

  56. #ifdef HAVE_MALLOC_H

  57. #include <malloc.h>

  58. #else

  59. #include <stdlib.h>

  60. #endif

  61. #include "swscale.h"

  62. #include "../cpudetect.h"

  63. #include "../bswap.h"

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

  65. #include "rgb2rgb.h"

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

  67. #include "../mp_msg.h"

  68. #undef MOVNTQ

  69. #undef PAVGB

  70. 

  71. //#undef HAVE_MMX2

  72. //#define HAVE_3DNOW

  73. //#undef HAVE_MMX

  74. //#undef ARCH_X86

  75. //#define WORDS_BIGENDIAN

  76. #define DITHER1XBPP

  77. 

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

  79. 

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

  81. 

  82. #ifdef MP_DEBUG

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

  84. #else

  85. #define ASSERT(x) ;

  86. #endif

  87. 

  88. #ifdef M_PI

  89. #define PI M_PI

  90. #else

  91. #define PI 3.14159265358979323846

  92. #endif

  93. 

  94. //FIXME replace this with something faster

  95. #define isPlanarYUV(x) ((x)==IMGFMT_YV12 || (x)==IMGFMT_I420)

  96. #define isYUV(x)       ((x)==IMGFMT_YUY2 || isPlanarYUV(x))

  97. #define isHalfChrV(x)  ((x)==IMGFMT_YV12 || (x)==IMGFMT_I420)

  98. #define isHalfChrH(x)  ((x)==IMGFMT_YUY2 || (x)==IMGFMT_YV12 || (x)==IMGFMT_I420)

  99. #define isPacked(x)    ((x)==IMGFMT_YUY2 || ((x)&IMGFMT_BGR_MASK)==IMGFMT_BGR || ((x)&IMGFMT_RGB_MASK)==IMGFMT_RGB)

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

  101. #define isSupportedIn(x)  ((x)==IMGFMT_YV12 || (x)==IMGFMT_I420 || (x)==IMGFMT_YUY2 \

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

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

  104. 			|| (x)==IMGFMT_Y800)

  105. #define isSupportedOut(x) ((x)==IMGFMT_YV12 || (x)==IMGFMT_I420 \

  106. 			|| (x)==IMGFMT_BGR32|| (x)==IMGFMT_BGR24|| (x)==IMGFMT_BGR16|| (x)==IMGFMT_BGR15)

  107. #define isBGR(x)       ((x)==IMGFMT_BGR32|| (x)==IMGFMT_BGR24|| (x)==IMGFMT_BGR16|| (x)==IMGFMT_BGR15)

  108. 

  109. #define RGB2YUV_SHIFT 16

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

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

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

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

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

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

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

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

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

  119. 

  120. extern int verbose; // defined in mplayer.c

  121. /*

  122. NOTES

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

  124. 

  125. TODO

  126. more intelligent missalignment avoidance for the horizontal scaler

  127. write special vertical cubic upscale version

  128. Optimize C code (yv12 / minmax)

  129. add support for packed pixel yuv input & output

  130. add support for Y8 output

  131. optimize bgr24 & bgr32

  132. add BGR4 output support

  133. write special BGR->BGR scaler

  134. deglobalize yuv2rgb*.c

  135. */

  136. 

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

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

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

  140. 

  141. #ifdef ARCH_X86

  142. #define CAN_COMPILE_X86_ASM

  143. #endif

  144. 

  145. #ifdef CAN_COMPILE_X86_ASM

  146. static uint64_t __attribute__((aligned(8))) yCoeff=    0x2568256825682568LL;

  147. static uint64_t __attribute__((aligned(8))) vrCoeff=   0x3343334333433343LL;

  148. static uint64_t __attribute__((aligned(8))) ubCoeff=   0x40cf40cf40cf40cfLL;

  149. static uint64_t __attribute__((aligned(8))) vgCoeff=   0xE5E2E5E2E5E2E5E2LL;

  150. static uint64_t __attribute__((aligned(8))) ugCoeff=   0xF36EF36EF36EF36ELL;

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

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

  153. static uint64_t __attribute__((aligned(8))) w400=      0x0400040004000400LL;

  154. static uint64_t __attribute__((aligned(8))) w80=       0x0080008000800080LL;

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

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

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

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

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

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

  161. 

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

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

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

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

  166. 

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

  168. 	0x0103010301030103LL,

  169. 	0x0200020002000200LL,};

  170. 

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

  172. 	0x0602060206020602LL,

  173. 	0x0004000400040004LL,};

  174. 

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

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

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

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

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

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

  181. 

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

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

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

  185. 

  186. #ifdef FAST_BGR2YV12

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

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

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

  190. #else

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

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

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

  194. #endif

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

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

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

  198. 

  199. // FIXME remove

  200. static uint64_t __attribute__((aligned(8))) asm_yalpha1;

  201. static uint64_t __attribute__((aligned(8))) asm_uvalpha1;

  202. #endif

  203. 

  204. // clipping helper table for C implementations:

  205. static unsigned char clip_table[768];

  206. 

  207. static unsigned short clip_table16b[768];

  208. static unsigned short clip_table16g[768];

  209. static unsigned short clip_table16r[768];

  210. static unsigned short clip_table15b[768];

  211. static unsigned short clip_table15g[768];

  212. static unsigned short clip_table15r[768];

  213. 

  214. // yuv->rgb conversion tables:

  215. static    int yuvtab_2568[256];

  216. static    int yuvtab_3343[256];

  217. static    int yuvtab_0c92[256];

  218. static    int yuvtab_1a1e[256];

  219. static    int yuvtab_40cf[256];

  220. // Needed for cubic scaler to catch overflows

  221. static    int clip_yuvtab_2568[768];

  222. static    int clip_yuvtab_3343[768];

  223. static    int clip_yuvtab_0c92[768];

  224. static    int clip_yuvtab_1a1e[768];

  225. static    int clip_yuvtab_40cf[768];

  226. 

  227. //global sws_flags from the command line

  228. int sws_flags=2;

  229. 

  230. //global srcFilter

  231. SwsFilter src_filter= {NULL, NULL, NULL, NULL};

  232. 

  233. float sws_lum_gblur= 0.0;

  234. float sws_chr_gblur= 0.0;

  235. int sws_chr_vshift= 0;

  236. int sws_chr_hshift= 0;

  237. float sws_chr_sharpen= 0.0;

  238. float sws_lum_sharpen= 0.0;

  239. 

  240. /* cpuCaps combined from cpudetect and whats actually compiled in

  241.    (if there is no support for something compiled in it wont appear here) */

  242. static CpuCaps cpuCaps;

  243. 

  244. void (*swScale)(SwsContext *context, uint8_t* src[], int srcStride[], int srcSliceY,

  245.              int srcSliceH, uint8_t* dst[], int dstStride[])=NULL;

  246. 

  247. static SwsVector *getConvVec(SwsVector *a, SwsVector *b);

  248. 

  249. #ifdef CAN_COMPILE_X86_ASM

  250. void in_asm_used_var_warning_killer()

  251. {

  252.  volatile int i= yCoeff+vrCoeff+ubCoeff+vgCoeff+ugCoeff+bF8+bFC+w400+w80+w10+

  253.  bm00001111+bm00000111+bm11111000+b16Mask+g16Mask+r16Mask+b15Mask+g15Mask+r15Mask+asm_yalpha1+ asm_uvalpha1+

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

  255.  if(i) i=0;

  256. }

  257. #endif

  258. 

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

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

  261. 				    uint8_t *dest, uint8_t *uDest, uint8_t *vDest, int dstW)

  262. {

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

  264. 	int i;

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

  266. 	{

  267. 		int val=0;

  268. 		int j;

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

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

  271. 

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

  273. 	}

  274. 

  275. 	if(uDest != NULL)

  276. 		for(i=0; i<(dstW>>1); i++)

  277. 		{

  278. 			int u=0;

  279. 			int v=0;

  280. 			int j;

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

  282. 			{

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

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

  285. 			}

  286. 

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

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

  289. 		}

  290. }

  291. 

  292. static inline void yuv2rgbXinC(int16_t *lumFilter, int16_t **lumSrc, int lumFilterSize,

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

  294. 				    uint8_t *dest, int dstW, int dstFormat)

  295. {

  296. 	if(dstFormat==IMGFMT_BGR32)

  297. 	{

  298. 		int i;

  299. #ifdef WORDS_BIGENDIAN

  300. 	dest++;

  301. #endif

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

  303. 			int j;

  304. 			int Y1=0;

  305. 			int Y2=0;

  306. 			int U=0;

  307. 			int V=0;

  308. 			int Cb, Cr, Cg;

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

  310. 			{

  311. 				Y1 += lumSrc[j][2*i] * lumFilter[j];

  312. 				Y2 += lumSrc[j][2*i+1] * lumFilter[j];

  313. 			}

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

  315. 			{

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

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

  318. 			}

  319. 			Y1= clip_yuvtab_2568[ (Y1>>19) + 256 ];

  320. 			Y2= clip_yuvtab_2568[ (Y2>>19) + 256 ];

  321. 			U >>= 19;

  322. 			V >>= 19;

  323. 

  324. 			Cb= clip_yuvtab_40cf[U+ 256];

  325. 			Cg= clip_yuvtab_1a1e[V+ 256] + yuvtab_0c92[U+ 256];

  326. 			Cr= clip_yuvtab_3343[V+ 256];

  327. 

  328. 			dest[8*i+0]=clip_table[((Y1 + Cb) >>13)];

  329. 			dest[8*i+1]=clip_table[((Y1 + Cg) >>13)];

  330. 			dest[8*i+2]=clip_table[((Y1 + Cr) >>13)];

  331. 

  332. 			dest[8*i+4]=clip_table[((Y2 + Cb) >>13)];

  333. 			dest[8*i+5]=clip_table[((Y2 + Cg) >>13)];

  334. 			dest[8*i+6]=clip_table[((Y2 + Cr) >>13)];

  335. 		}

  336. 	}

  337. 	else if(dstFormat==IMGFMT_BGR24)

  338. 	{

  339. 		int i;

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

  341. 			int j;

  342. 			int Y1=0;

  343. 			int Y2=0;

  344. 			int U=0;

  345. 			int V=0;

  346. 			int Cb, Cr, Cg;

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

  348. 			{

  349. 				Y1 += lumSrc[j][2*i] * lumFilter[j];

  350. 				Y2 += lumSrc[j][2*i+1] * lumFilter[j];

  351. 			}

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

  353. 			{

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

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

  356. 			}

  357. 			Y1= clip_yuvtab_2568[ (Y1>>19) + 256 ];

  358. 			Y2= clip_yuvtab_2568[ (Y2>>19) + 256 ];

  359. 			U >>= 19;

  360. 			V >>= 19;

  361. 

  362. 			Cb= clip_yuvtab_40cf[U+ 256];

  363. 			Cg= clip_yuvtab_1a1e[V+ 256] + yuvtab_0c92[U+ 256];

  364. 			Cr= clip_yuvtab_3343[V+ 256];

  365. 

  366. 			dest[0]=clip_table[((Y1 + Cb) >>13)];

  367. 			dest[1]=clip_table[((Y1 + Cg) >>13)];

  368. 			dest[2]=clip_table[((Y1 + Cr) >>13)];

  369. 

  370. 			dest[3]=clip_table[((Y2 + Cb) >>13)];

  371. 			dest[4]=clip_table[((Y2 + Cg) >>13)];

  372. 			dest[5]=clip_table[((Y2 + Cr) >>13)];

  373. 			dest+=6;

  374. 		}

  375. 	}

  376. 	else if(dstFormat==IMGFMT_BGR16)

  377. 	{

  378. 		int i;

  379. #ifdef DITHER1XBPP

  380. 		static int ditherb1=1<<14;

  381. 		static int ditherg1=1<<13;

  382. 		static int ditherr1=2<<14;

  383. 		static int ditherb2=3<<14;

  384. 		static int ditherg2=3<<13;

  385. 		static int ditherr2=0<<14;

  386. 

  387. 		ditherb1 ^= (1^2)<<14;

  388. 		ditherg1 ^= (1^2)<<13;

  389. 		ditherr1 ^= (1^2)<<14;

  390. 		ditherb2 ^= (3^0)<<14;

  391. 		ditherg2 ^= (3^0)<<13;

  392. 		ditherr2 ^= (3^0)<<14;

  393. #else

  394. 		const int ditherb1=0;

  395. 		const int ditherg1=0;

  396. 		const int ditherr1=0;

  397. 		const int ditherb2=0;

  398. 		const int ditherg2=0;

  399. 		const int ditherr2=0;

  400. #endif

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

  402. 			int j;

  403. 			int Y1=0;

  404. 			int Y2=0;

  405. 			int U=0;

  406. 			int V=0;

  407. 			int Cb, Cr, Cg;

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

  409. 			{

  410. 				Y1 += lumSrc[j][2*i] * lumFilter[j];

  411. 				Y2 += lumSrc[j][2*i+1] * lumFilter[j];

  412. 			}

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

  414. 			{

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

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

  417. 			}

  418. 			Y1= clip_yuvtab_2568[ (Y1>>19) + 256 ];

  419. 			Y2= clip_yuvtab_2568[ (Y2>>19) + 256 ];

  420. 			U >>= 19;

  421. 			V >>= 19;

  422. 

  423. 			Cb= clip_yuvtab_40cf[U+ 256];

  424. 			Cg= clip_yuvtab_1a1e[V+ 256] + yuvtab_0c92[U+ 256];

  425. 			Cr= clip_yuvtab_3343[V+ 256];

  426. 

  427. 			((uint16_t*)dest)[2*i] =

  428. 				clip_table16b[(Y1 + Cb + ditherb1) >>13] |

  429. 				clip_table16g[(Y1 + Cg + ditherg1) >>13] |

  430. 				clip_table16r[(Y1 + Cr + ditherr1) >>13];

  431. 

  432. 			((uint16_t*)dest)[2*i+1] =

  433. 				clip_table16b[(Y2 + Cb + ditherb2) >>13] |

  434. 				clip_table16g[(Y2 + Cg + ditherg2) >>13] |

  435. 				clip_table16r[(Y2 + Cr + ditherr2) >>13];

  436. 		}

  437. 	}

  438. 	else if(dstFormat==IMGFMT_BGR15)

  439. 	{

  440. 		int i;

  441. #ifdef DITHER1XBPP

  442. 		static int ditherb1=1<<14;

  443. 		static int ditherg1=1<<14;

  444. 		static int ditherr1=2<<14;

  445. 		static int ditherb2=3<<14;

  446. 		static int ditherg2=3<<14;

  447. 		static int ditherr2=0<<14;

  448. 

  449. 		ditherb1 ^= (1^2)<<14;

  450. 		ditherg1 ^= (1^2)<<14;

  451. 		ditherr1 ^= (1^2)<<14;

  452. 		ditherb2 ^= (3^0)<<14;

  453. 		ditherg2 ^= (3^0)<<14;

  454. 		ditherr2 ^= (3^0)<<14;

  455. #else

  456. 		const int ditherb1=0;

  457. 		const int ditherg1=0;

  458. 		const int ditherr1=0;

  459. 		const int ditherb2=0;

  460. 		const int ditherg2=0;

  461. 		const int ditherr2=0;

  462. #endif

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

  464. 			int j;

  465. 			int Y1=0;

  466. 			int Y2=0;

  467. 			int U=0;

  468. 			int V=0;

  469. 			int Cb, Cr, Cg;

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

  471. 			{

  472. 				Y1 += lumSrc[j][2*i] * lumFilter[j];

  473. 				Y2 += lumSrc[j][2*i+1] * lumFilter[j];

  474. 			}

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

  476. 			{

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

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

  479. 			}

  480. 			Y1= clip_yuvtab_2568[ (Y1>>19) + 256 ];

  481. 			Y2= clip_yuvtab_2568[ (Y2>>19) + 256 ];

  482. 			U >>= 19;

  483. 			V >>= 19;

  484. 

  485. 			Cb= clip_yuvtab_40cf[U+ 256];

  486. 			Cg= clip_yuvtab_1a1e[V+ 256] + yuvtab_0c92[U+ 256];

  487. 			Cr= clip_yuvtab_3343[V+ 256];

  488. 

  489. 			((uint16_t*)dest)[2*i] =

  490. 				clip_table15b[(Y1 + Cb + ditherb1) >>13] |

  491. 				clip_table15g[(Y1 + Cg + ditherg1) >>13] |

  492. 				clip_table15r[(Y1 + Cr + ditherr1) >>13];

  493. 

  494. 			((uint16_t*)dest)[2*i+1] =

  495. 				clip_table15b[(Y2 + Cb + ditherb2) >>13] |

  496. 				clip_table15g[(Y2 + Cg + ditherg2) >>13] |

  497. 				clip_table15r[(Y2 + Cr + ditherr2) >>13];

  498. 		}

  499. 	}

  500. }

  501. 

  502. 

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

  504. //Plain C versions

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

  506. #define COMPILE_C

  507. #endif

  508. 

  509. #ifdef CAN_COMPILE_X86_ASM

  510. 

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

  512. #define COMPILE_MMX

  513. #endif

  514. 

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

  516. #define COMPILE_MMX2

  517. #endif

  518. 

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

  520. #define COMPILE_3DNOW

  521. #endif

  522. #endif //CAN_COMPILE_X86_ASM

  523. 

  524. #undef HAVE_MMX

  525. #undef HAVE_MMX2

  526. #undef HAVE_3DNOW

  527. 

  528. #ifdef COMPILE_C

  529. #undef HAVE_MMX

  530. #undef HAVE_MMX2

  531. #undef HAVE_3DNOW

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

  533. #include "swscale_template.c"

  534. #endif

  535. 

  536. #ifdef CAN_COMPILE_X86_ASM

  537. 

  538. //X86 versions

  539. /*

  540. #undef RENAME

  541. #undef HAVE_MMX

  542. #undef HAVE_MMX2

  543. #undef HAVE_3DNOW

  544. #define ARCH_X86

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

  546. #include "swscale_template.c"

  547. */

  548. //MMX versions

  549. #ifdef COMPILE_MMX

  550. #undef RENAME

  551. #define HAVE_MMX

  552. #undef HAVE_MMX2

  553. #undef HAVE_3DNOW

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

  555. #include "swscale_template.c"

  556. #endif

  557. 

  558. //MMX2 versions

  559. #ifdef COMPILE_MMX2

  560. #undef RENAME

  561. #define HAVE_MMX

  562. #define HAVE_MMX2

  563. #undef HAVE_3DNOW

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

  565. #include "swscale_template.c"

  566. #endif

  567. 

  568. //3DNOW versions

  569. #ifdef COMPILE_3DNOW

  570. #undef RENAME

  571. #define HAVE_MMX

  572. #undef HAVE_MMX2

  573. #define HAVE_3DNOW

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

  575. #include "swscale_template.c"

  576. #endif

  577. 

  578. #endif //CAN_COMPILE_X86_ASM

  579. 

  580. // minor note: the HAVE_xyz is messed up after that line so dont use it

  581. 

  582. 

  583. // old global scaler, dont use for new code

  584. // will use sws_flags from the command line

  585. void SwScale_YV12slice(unsigned char* src[], int srcStride[], int srcSliceY ,

  586. 			     int srcSliceH, uint8_t* dst[], int dstStride, int dstbpp,

  587. 			     int srcW, int srcH, int dstW, int dstH){

  588. 

  589. 	static SwsContext *context=NULL;

  590. 	int dstFormat;

  591. 	int dstStride3[3]= {dstStride, dstStride>>1, dstStride>>1};

  592. 

  593. 	switch(dstbpp)

  594. 	{

  595. 		case 8 : dstFormat= IMGFMT_Y8;		break;

  596. 		case 12: dstFormat= IMGFMT_YV12;	break;

  597. 		case 15: dstFormat= IMGFMT_BGR15;	break;

  598. 		case 16: dstFormat= IMGFMT_BGR16;	break;

  599. 		case 24: dstFormat= IMGFMT_BGR24;	break;

  600. 		case 32: dstFormat= IMGFMT_BGR32;	break;

  601. 		default: return;

  602. 	}

  603. 

  604. 	if(!context) context=getSwsContextFromCmdLine(srcW, srcH, IMGFMT_YV12, dstW, dstH, dstFormat);

  605. 

  606. 	context->swScale(context, src, srcStride, srcSliceY, srcSliceH, dst, dstStride3);

  607. }

  608. 

  609. // will use sws_flags & src_filter (from cmd line)

  610. SwsContext *getSwsContextFromCmdLine(int srcW, int srcH, int srcFormat, int dstW, int dstH, int dstFormat)

  611. {

  612. 	int flags=0;

  613. 	static int firstTime=1;

  614. 

  615. #ifdef ARCH_X86

  616. 	if(gCpuCaps.hasMMX)

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

  618. #endif

  619. 	if(firstTime)

  620. 	{

  621. 		firstTime=0;

  622. 		flags= SWS_PRINT_INFO;

  623. 	}

  624. 	else if(verbose>1) flags= SWS_PRINT_INFO;

  625. 

  626. 	if(src_filter.lumH) freeVec(src_filter.lumH);

  627. 	if(src_filter.lumV) freeVec(src_filter.lumV);

  628. 	if(src_filter.chrH) freeVec(src_filter.chrH);

  629. 	if(src_filter.chrV) freeVec(src_filter.chrV);

  630. 

  631. 	if(sws_lum_gblur!=0.0){

  632. 		src_filter.lumH= getGaussianVec(sws_lum_gblur, 3.0);

  633. 		src_filter.lumV= getGaussianVec(sws_lum_gblur, 3.0);

  634. 	}else{

  635. 		src_filter.lumH= getIdentityVec();

  636. 		src_filter.lumV= getIdentityVec();

  637. 	}

  638. 

  639. 	if(sws_chr_gblur!=0.0){

  640. 		src_filter.chrH= getGaussianVec(sws_chr_gblur, 3.0);

  641. 		src_filter.chrV= getGaussianVec(sws_chr_gblur, 3.0);

  642. 	}else{

  643. 		src_filter.chrH= getIdentityVec();

  644. 		src_filter.chrV= getIdentityVec();

  645. 	}

  646. 

  647. 	if(sws_chr_sharpen!=0.0){

  648. 		SwsVector *g= getConstVec(-1.0, 3);

  649. 		SwsVector *id= getConstVec(10.0/sws_chr_sharpen, 1);

  650. 		g->coeff[1]=2.0;

  651. 		addVec(id, g);

  652. 		convVec(src_filter.chrH, id);

  653. 		convVec(src_filter.chrV, id);

  654. 		freeVec(g);

  655. 		freeVec(id);

  656. 	}

  657. 

  658. 	if(sws_lum_sharpen!=0.0){

  659. 		SwsVector *g= getConstVec(-1.0, 3);

  660. 		SwsVector *id= getConstVec(10.0/sws_lum_sharpen, 1);

  661. 		g->coeff[1]=2.0;

  662. 		addVec(id, g);

  663. 		convVec(src_filter.lumH, id);

  664. 		convVec(src_filter.lumV, id);

  665. 		freeVec(g);

  666. 		freeVec(id);

  667. 	}

  668. 

  669. 	if(sws_chr_hshift)

  670. 		shiftVec(src_filter.chrH, sws_chr_hshift);

  671. 

  672. 	if(sws_chr_vshift)

  673. 		shiftVec(src_filter.chrV, sws_chr_vshift);

  674. 

  675. 	normalizeVec(src_filter.chrH, 1.0);

  676. 	normalizeVec(src_filter.chrV, 1.0);

  677. 	normalizeVec(src_filter.lumH, 1.0);

  678. 	normalizeVec(src_filter.lumV, 1.0);

  679. 

  680. 	if(verbose > 1) printVec(src_filter.chrH);

  681. 	if(verbose > 1) printVec(src_filter.lumH);

  682. 

  683. 	switch(sws_flags)

  684. 	{

  685. 		case 0: flags|= SWS_FAST_BILINEAR; break;

  686. 		case 1: flags|= SWS_BILINEAR; break;

  687. 		case 2: flags|= SWS_BICUBIC; break;

  688. 		case 3: flags|= SWS_X; break;

  689. 		case 4: flags|= SWS_POINT; break;

  690. 		case 5: flags|= SWS_AREA; break;

  691. 		default:flags|= SWS_BILINEAR; break;

  692. 	}

  693. 

  694. 	return getSwsContext(srcW, srcH, srcFormat, dstW, dstH, dstFormat, flags, &src_filter, NULL);

  695. }

  696. 

  697. 

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

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

  700. 			      SwsVector *srcFilter, SwsVector *dstFilter)

  701. {

  702. 	int i;

  703. 	int filterSize;

  704. 	int filter2Size;

  705. 	int minFilterSize;

  706. 	double *filter=NULL;

  707. 	double *filter2=NULL;

  708. #ifdef ARCH_X86

  709. 	if(gCpuCaps.hasMMX)

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

  711. #endif

  712. 

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

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

  715. 

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

  717. 	{

  718. 		int i;

  719. 		filterSize= 1;

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

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

  722. 

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

  724. 		{

  725. 			filter[i*filterSize]=1;

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

  727. 		}

  728. 

  729. 	}

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

  731. 	{

  732. 		int i;

  733. 		int xDstInSrc;

  734. 		filterSize= 1;

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

  736. 		

  737. 		xDstInSrc= xInc/2 - 0x8000;

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

  739. 		{

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

  741. 

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

  743. 			filter[i]= 1.0;

  744. 			xDstInSrc+= xInc;

  745. 		}

  746. 	}

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

  748. 	{

  749. 		int i;

  750. 		int xDstInSrc;

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

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

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

  754. //		printf("%d %d %d\n", filterSize, srcW, dstW);

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

  756. 

  757. 		xDstInSrc= xInc/2 - 0x8000;

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

  759. 		{

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

  761. 			int j;

  762. 

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

  764. 			if((flags & SWS_BICUBIC) || (flags & SWS_X))

  765. 			{

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

  767. 				double y1,y2,y3,y4;

  768. 				double A= -0.6;

  769. 				if(flags & SWS_BICUBIC){

  770. 						// Equation is from VirtualDub

  771. 					y1 = (        +     A*d -       2.0*A*d*d +       A*d*d*d);

  772. 					y2 = (+ 1.0             -     (A+3.0)*d*d + (A+2.0)*d*d*d);

  773. 					y3 = (        -     A*d + (2.0*A+3.0)*d*d - (A+2.0)*d*d*d);

  774. 					y4 = (                  +           A*d*d -       A*d*d*d);

  775. 				}else{

  776. 						// cubic interpolation (derived it myself)

  777. 					y1 = (    -2.0*d + 3.0*d*d - 1.0*d*d*d)/6.0;

  778. 					y2 = (6.0 -3.0*d - 6.0*d*d + 3.0*d*d*d)/6.0;

  779. 					y3 = (    +6.0*d + 3.0*d*d - 3.0*d*d*d)/6.0;

  780. 					y4 = (    -1.0*d           + 1.0*d*d*d)/6.0;

  781. 				}

  782. 

  783. //				printf("%d %d %d \n", coeff, (int)d, xDstInSrc);

  784. 				filter[i*filterSize + 0]= y1;

  785. 				filter[i*filterSize + 1]= y2;

  786. 				filter[i*filterSize + 2]= y3;

  787. 				filter[i*filterSize + 3]= y4;

  788. //				printf("%1.3f %1.3f %1.3f %1.3f %1.3f\n",d , y1, y2, y3, y4);

  789. 			}

  790. 			else

  791. 			{

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

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

  794. 				{

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

  796. 					double coeff= 1.0 - d;

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

  798. 	//				printf("%d %d %d \n", coeff, (int)d, xDstInSrc);

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

  800. 					xx++;

  801. 				}

  802. 			}

  803. 			xDstInSrc+= xInc;

  804. 		}

  805. 	}

  806. 	else // downscale

  807. 	{

  808. 		int xDstInSrc;

  809. 		ASSERT(dstW <= srcW)

  810. 

  811. 		if(flags&SWS_BICUBIC)	filterSize= (int)ceil(1 + 4.0*srcW / (double)dstW);

  812. 		else if(flags&SWS_X)	filterSize= (int)ceil(1 + 4.0*srcW / (double)dstW);

  813. 		else if(flags&SWS_AREA)	filterSize= (int)ceil(1 + 1.0*srcW / (double)dstW);

  814. 		else /* BILINEAR */	filterSize= (int)ceil(1 + 2.0*srcW / (double)dstW);

  815. //		printf("%d %d %d\n", *filterSize, srcW, dstW);

  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= (int)((double)xDstInSrc/(double)(1<<16) - (filterSize-1)*0.5 + 0.5);

  822. 			int j;

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

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

  825. 			{

  826. 				double d= ABS((xx<<16) - xDstInSrc)/(double)xInc;

  827. 				double coeff;

  828. 				if((flags & SWS_BICUBIC) || (flags & SWS_X))

  829. 				{

  830. 					double A= -0.75;

  831. //					d*=2;

  832. 					// Equation is from VirtualDub

  833. 					if(d<1.0)

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

  835. 					else if(d<2.0)

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

  837. 					else

  838. 						coeff=0.0;

  839. 				}

  840. 				else if(flags & SWS_AREA)

  841. 				{

  842. 					double srcPixelSize= (1<<16)/(double)xInc;

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

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

  845. 					else coeff=0.0;

  846. 				}

  847. 				else

  848. 				{

  849. 					coeff= 1.0 - d;

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

  851. 				}

  852. //				printf("%1.3f %2.3f %d \n", coeff, d, xDstInSrc);

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

  854. 				xx++;

  855. 			}

  856. 			xDstInSrc+= xInc;

  857. 		}

  858. 	}

  859. 

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

  861. 	   free(filter);

  862. 	*/

  863. 	ASSERT(filterSize>0)

  864. 	filter2Size= filterSize;

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

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

  867. 	ASSERT(filter2Size>0)

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

  869. 

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

  871. 	{

  872. 		int j;

  873. 		SwsVector scaleFilter;

  874. 		SwsVector *outVec;

  875. 

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

  877. 		scaleFilter.length= filterSize;

  878. 

  879. 		if(srcFilter) outVec= getConvVec(srcFilter, &scaleFilter);

  880. 		else	      outVec= &scaleFilter;

  881. 

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

  883. 		//FIXME dstFilter

  884. 

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

  886. 		{

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

  888. 		}

  889. 

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

  891. 

  892. 		if(outVec != &scaleFilter) freeVec(outVec);

  893. 	}

  894. 	free(filter); filter=NULL;

  895. 

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

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

  898. 	minFilterSize= 0;

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

  900. 	{

  901. 		int min= filter2Size;

  902. 		int j;

  903. 		double cutOff=0.0;

  904. 

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

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

  907. 		{

  908. 			int k;

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

  910. 

  911. 			if(cutOff > SWS_MAX_REDUCE_CUTOFF) break;

  912. 

  913. 			/* preserve Monotonicity because the core cant handle the filter otherwise */

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

  915. 

  916. 			// Move filter coeffs left

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

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

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

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

  921. 		}

  922. 

  923. 		cutOff=0.0;

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

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

  926. 		{

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

  928. 

  929. 			if(cutOff > SWS_MAX_REDUCE_CUTOFF) break;

  930. 			min--;

  931. 		}

  932. 

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

  934. 	}

  935. 

  936. 	ASSERT(minFilterSize > 0)

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

  938. 	ASSERT(filterSize > 0)

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

  940. 	*outFilterSize= filterSize;

  941. 

  942. 	if(flags&SWS_PRINT_INFO)

  943. 		mp_msg(MSGT_SWS,MSGL_V,"SwScaler: reducing / aligning filtersize %d -> %d\n", filter2Size, filterSize);

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

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

  946. 	{

  947. 		int j;

  948. 

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

  950. 		{

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

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

  953. 		}

  954. 	}

  955. 	free(filter2); filter2=NULL;

  956. 	

  957. 

  958. 	//FIXME try to align filterpos if possible

  959. 

  960. 	//fix borders

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

  962. 	{

  963. 		int j;

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

  965. 		{

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

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

  968. 			{

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

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

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

  972. 			}

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

  974. 		}

  975. 

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

  977. 		{

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

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

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

  981. 			{

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

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

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

  985. 			}

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

  987. 		}

  988. 	}

  989. 

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

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

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

  993. 

  994. 	/* Normalize & Store in outFilter */

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

  996. 	{

  997. 		int j;

  998. 		double sum=0;

  999. 		double scale= one;

  1000. 		for(j=0; j<filterSize; j++)

  1001. 		{

  1002. 			sum+= filter[i*filterSize + j];

  1003. 		}

  1004. 		scale/= sum;

  1005. 		for(j=0; j<filterSize; j++)

  1006. 		{

  1007. 			(*outFilter)[i*(*outFilterSize) + j]= (int)(filter[i*filterSize + j]*scale);

  1008. 		}

  1009. 	}

  1010. 	

  1011. 	(*filterPos)[dstW]= (*filterPos)[dstW-1]; // the MMX scaler will read over the end

  1012. 	for(i=0; i<*outFilterSize; i++)

  1013. 	{

  1014. 		int j= dstW*(*outFilterSize);

  1015. 		(*outFilter)[j + i]= (*outFilter)[j + i - (*outFilterSize)];

  1016. 	}

  1017. 

  1018. 	free(filter);

  1019. }

  1020. 

  1021. #ifdef ARCH_X86

  1022. static void initMMX2HScaler(int dstW, int xInc, uint8_t *funnyCode, int16_t *filter, int32_t *filterPos, int numSplits)

  1023. {

  1024. 	uint8_t *fragmentA;

  1025. 	int imm8OfPShufW1A;

  1026. 	int imm8OfPShufW2A;

  1027. 	int fragmentLengthA;

  1028. 	uint8_t *fragmentB;

  1029. 	int imm8OfPShufW1B;

  1030. 	int imm8OfPShufW2B;

  1031. 	int fragmentLengthB;

  1032. 	int fragmentPos;

  1033. 

  1034. 	int xpos, i;

  1035. 

  1036. 	// create an optimized horizontal scaling routine

  1037. 

  1038. 	//code fragment

  1039. 

  1040. 	asm volatile(

  1041. 		"jmp 9f				\n\t"

  1042. 	// Begin

  1043. 		"0:				\n\t"

  1044. 		"movq (%%edx, %%eax), %%mm3	\n\t" 

  1045. 		"movd (%%ecx, %%esi), %%mm0	\n\t" 

  1046. 		"movd 1(%%ecx, %%esi), %%mm1	\n\t"

  1047. 		"punpcklbw %%mm7, %%mm1		\n\t"

  1048. 		"punpcklbw %%mm7, %%mm0		\n\t"

  1049. 		"pshufw $0xFF, %%mm1, %%mm1	\n\t"

  1050. 		"1:				\n\t"

  1051. 		"pshufw $0xFF, %%mm0, %%mm0	\n\t"

  1052. 		"2:				\n\t"

  1053. 		"psubw %%mm1, %%mm0		\n\t"

  1054. 		"movl 8(%%ebx, %%eax), %%esi	\n\t"

  1055. 		"pmullw %%mm3, %%mm0		\n\t"

  1056. 		"psllw $7, %%mm1		\n\t"

  1057. 		"paddw %%mm1, %%mm0		\n\t"

  1058. 

  1059. 		"movq %%mm0, (%%edi, %%eax)	\n\t"

  1060. 

  1061. 		"addl $8, %%eax			\n\t"

  1062. 	// End

  1063. 		"9:				\n\t"

  1064. //		"int $3\n\t"

  1065. 		"leal 0b, %0			\n\t"

  1066. 		"leal 1b, %1			\n\t"

  1067. 		"leal 2b, %2			\n\t"

  1068. 		"decl %1			\n\t"

  1069. 		"decl %2			\n\t"

  1070. 		"subl %0, %1			\n\t"

  1071. 		"subl %0, %2			\n\t"

  1072. 		"leal 9b, %3			\n\t"

  1073. 		"subl %0, %3			\n\t"

  1074. 

  1075. 

  1076. 		:"=r" (fragmentA), "=r" (imm8OfPShufW1A), "=r" (imm8OfPShufW2A),

  1077. 		"=r" (fragmentLengthA)

  1078. 	);

  1079. 

  1080. 	asm volatile(

  1081. 		"jmp 9f				\n\t"

  1082. 	// Begin

  1083. 		"0:				\n\t"

  1084. 		"movq (%%edx, %%eax), %%mm3	\n\t" 

  1085. 		"movd (%%ecx, %%esi), %%mm0	\n\t" 

  1086. 		"punpcklbw %%mm7, %%mm0		\n\t"

  1087. 		"pshufw $0xFF, %%mm0, %%mm1	\n\t"

  1088. 		"1:				\n\t"

  1089. 		"pshufw $0xFF, %%mm0, %%mm0	\n\t"

  1090. 		"2:				\n\t"

  1091. 		"psubw %%mm1, %%mm0		\n\t"

  1092. 		"movl 8(%%ebx, %%eax), %%esi	\n\t"

  1093. 		"pmullw %%mm3, %%mm0		\n\t"

  1094. 		"psllw $7, %%mm1		\n\t"

  1095. 		"paddw %%mm1, %%mm0		\n\t"

  1096. 

  1097. 		"movq %%mm0, (%%edi, %%eax)	\n\t"

  1098. 

  1099. 		"addl $8, %%eax			\n\t"

  1100. 	// End

  1101. 		"9:				\n\t"

  1102. //		"int $3\n\t"

  1103. 		"leal 0b, %0			\n\t"

  1104. 		"leal 1b, %1			\n\t"

  1105. 		"leal 2b, %2			\n\t"

  1106. 		"decl %1			\n\t"

  1107. 		"decl %2			\n\t"

  1108. 		"subl %0, %1			\n\t"

  1109. 		"subl %0, %2			\n\t"

  1110. 		"leal 9b, %3			\n\t"

  1111. 		"subl %0, %3			\n\t"

  1112. 

  1113. 

  1114. 		:"=r" (fragmentB), "=r" (imm8OfPShufW1B), "=r" (imm8OfPShufW2B),

  1115. 		"=r" (fragmentLengthB)

  1116. 	);

  1117. 

  1118. 	xpos= 0; //lumXInc/2 - 0x8000; // difference between pixel centers

  1119. 	fragmentPos=0;

  1120. 	

  1121. 	for(i=0; i<dstW/numSplits; i++)

  1122. 	{

  1123. 		int xx=xpos>>16;

  1124. 

  1125. 		if((i&3) == 0)

  1126. 		{

  1127. 			int a=0;

  1128. 			int b=((xpos+xInc)>>16) - xx;

  1129. 			int c=((xpos+xInc*2)>>16) - xx;

  1130. 			int d=((xpos+xInc*3)>>16) - xx;

  1131. 

  1132. 			filter[i  ] = (( xpos         & 0xFFFF) ^ 0xFFFF)>>9;

  1133. 			filter[i+1] = (((xpos+xInc  ) & 0xFFFF) ^ 0xFFFF)>>9;

  1134. 			filter[i+2] = (((xpos+xInc*2) & 0xFFFF) ^ 0xFFFF)>>9;

  1135. 			filter[i+3] = (((xpos+xInc*3) & 0xFFFF) ^ 0xFFFF)>>9;

  1136. 			filterPos[i/2]= xx;

  1137. 

  1138. 			if(d+1<4)

  1139. 			{

  1140. 				int maxShift= 3-(d+1);

  1141. 				int shift=0;

  1142. 

  1143. 				memcpy(funnyCode + fragmentPos, fragmentB, fragmentLengthB);

  1144. 

  1145. 				funnyCode[fragmentPos + imm8OfPShufW1B]=

  1146. 					(a+1) | ((b+1)<<2) | ((c+1)<<4) | ((d+1)<<6);

  1147. 				funnyCode[fragmentPos + imm8OfPShufW2B]=

  1148. 					a | (b<<2) | (c<<4) | (d<<6);

  1149. 

  1150. 				if(i+3>=dstW) shift=maxShift; //avoid overread

  1151. 				else if((filterPos[i/2]&3) <= maxShift) shift=filterPos[i/2]&3; //Align

  1152. 

  1153. 				if(shift && i>=shift)

  1154. 				{

  1155. 					funnyCode[fragmentPos + imm8OfPShufW1B]+= 0x55*shift;

  1156. 					funnyCode[fragmentPos + imm8OfPShufW2B]+= 0x55*shift;

  1157. 					filterPos[i/2]-=shift;

  1158. 				}

  1159. 

  1160. 				fragmentPos+= fragmentLengthB;

  1161. 			}

  1162. 			else

  1163. 			{

  1164. 				int maxShift= 3-d;

  1165. 				int shift=0;

  1166. 

  1167. 				memcpy(funnyCode + fragmentPos, fragmentA, fragmentLengthA);

  1168. 

  1169. 				funnyCode[fragmentPos + imm8OfPShufW1A]=

  1170. 				funnyCode[fragmentPos + imm8OfPShufW2A]=

  1171. 					a | (b<<2) | (c<<4) | (d<<6);

  1172. 

  1173. 				if(i+4>=dstW) shift=maxShift; //avoid overread

  1174. 				else if((filterPos[i/2]&3) <= maxShift) shift=filterPos[i/2]&3; //partial align

  1175. 

  1176. 				if(shift && i>=shift)

  1177. 				{

  1178. 					funnyCode[fragmentPos + imm8OfPShufW1A]+= 0x55*shift;

  1179. 					funnyCode[fragmentPos + imm8OfPShufW2A]+= 0x55*shift;

  1180. 					filterPos[i/2]-=shift;

  1181. 				}

  1182. 

  1183. 				fragmentPos+= fragmentLengthA;

  1184. 			}

  1185. 

  1186. 			funnyCode[fragmentPos]= RET;

  1187. 		}

  1188. 		xpos+=xInc;

  1189. 	}

  1190. 	filterPos[i/2]= xpos>>16; // needed to jump to the next part

  1191. }

  1192. #endif // ARCH_X86

  1193. 

  1194. //FIXME remove

  1195. void SwScale_Init(){

  1196. }

  1197. 

  1198. static void globalInit(){

  1199.     // generating tables:

  1200.     int i;

  1201.     for(i=0; i<768; i++){

  1202. 	int c= MIN(MAX(i-256, 0), 255);

  1203. 	clip_table[i]=c;

  1204. 	yuvtab_2568[c]= clip_yuvtab_2568[i]=(0x2568*(c-16))+(256<<13);

  1205. 	yuvtab_3343[c]= clip_yuvtab_3343[i]=0x3343*(c-128);

  1206. 	yuvtab_0c92[c]= clip_yuvtab_0c92[i]=-0x0c92*(c-128);

  1207. 	yuvtab_1a1e[c]= clip_yuvtab_1a1e[i]=-0x1a1e*(c-128);

  1208. 	yuvtab_40cf[c]= clip_yuvtab_40cf[i]=0x40cf*(c-128);

  1209.     }

  1210. 

  1211.     for(i=0; i<768; i++)

  1212.     {

  1213. 	int v= clip_table[i];

  1214. 	clip_table16b[i]=  v>>3;

  1215. 	clip_table16g[i]= (v<<3)&0x07E0;

  1216. 	clip_table16r[i]= (v<<8)&0xF800;

  1217. 	clip_table15b[i]=  v>>3;

  1218. 	clip_table15g[i]= (v<<2)&0x03E0;

  1219. 	clip_table15r[i]= (v<<7)&0x7C00;

  1220.     }

  1221. 

  1222. cpuCaps= gCpuCaps;

  1223. 

  1224. #ifdef RUNTIME_CPUDETECT

  1225. #ifdef CAN_COMPILE_X86_ASM

  1226. 	// ordered per speed fasterst first

  1227. 	if(gCpuCaps.hasMMX2)

  1228. 		swScale= swScale_MMX2;

  1229. 	else if(gCpuCaps.has3DNow)

  1230. 		swScale= swScale_3DNow;

  1231. 	else if(gCpuCaps.hasMMX)

  1232. 		swScale= swScale_MMX;

  1233. 	else

  1234. 		swScale= swScale_C;

  1235. 

  1236. #else

  1237. 	swScale= swScale_C;

  1238. 	cpuCaps.hasMMX2 = cpuCaps.hasMMX = cpuCaps.has3DNow = 0;

  1239. #endif

  1240. #else //RUNTIME_CPUDETECT

  1241. #ifdef HAVE_MMX2

  1242. 	swScale= swScale_MMX2;

  1243. 	cpuCaps.has3DNow = 0;

  1244. #elif defined (HAVE_3DNOW)

  1245. 	swScale= swScale_3DNow;

  1246. 	cpuCaps.hasMMX2 = 0;

  1247. #elif defined (HAVE_MMX)

  1248. 	swScale= swScale_MMX;

  1249. 	cpuCaps.hasMMX2 = cpuCaps.has3DNow = 0;

  1250. #else

  1251. 	swScale= swScale_C;

  1252. 	cpuCaps.hasMMX2 = cpuCaps.hasMMX = cpuCaps.has3DNow = 0;

  1253. #endif

  1254. #endif //!RUNTIME_CPUDETECT

  1255. }

  1256. 

  1257. /* Warper functions for yuv2bgr */

  1258. static void planarYuvToBgr(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1259.              int srcSliceH, uint8_t* dstParam[], int dstStride[]){

  1260. 	uint8_t *dst=dstParam[0] + dstStride[0]*srcSliceY;

  1261. 

  1262. 	if(c->srcFormat==IMGFMT_YV12)

  1263. 		yuv2rgb( dst,src[0],src[1],src[2],c->srcW,srcSliceH,dstStride[0],srcStride[0],srcStride[1] );

  1264. 	else /* I420 & IYUV */

  1265. 		yuv2rgb( dst,src[0],src[2],src[1],c->srcW,srcSliceH,dstStride[0],srcStride[0],srcStride[1] );

  1266. }

  1267. 

  1268. static void bgr24to32Wrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1269.              int srcSliceH, uint8_t* dst[], int dstStride[]){

  1270. 	

  1271. 	if(dstStride[0]*3==srcStride[0]*4)

  1272. 		rgb24to32(src[0], dst[0] + dstStride[0]*srcSliceY, srcSliceH*srcStride[0]);

  1273. 	else

  1274. 	{

  1275. 		int i;

  1276. 		uint8_t *srcPtr= src[0];

  1277. 		uint8_t *dstPtr= dst[0] + dstStride[0]*srcSliceY;

  1278. 

  1279. 		for(i=0; i<srcSliceH; i++)

  1280. 		{

  1281. 			rgb24to32(srcPtr, dstPtr, c->srcW*3);

  1282. 			srcPtr+= srcStride[0];

  1283. 			dstPtr+= dstStride[0];

  1284. 		}

  1285. 	}     

  1286. }

  1287. 

  1288. static void bgr32to24Wrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1289.              int srcSliceH, uint8_t* dst[], int dstStride[]){

  1290. 	

  1291. 	if(dstStride[0]*4==srcStride[0]*3)

  1292. 		rgb32to24(src[0], dst[0] + dstStride[0]*srcSliceY, srcSliceH*srcStride[0]);

  1293. 	else

  1294. 	{

  1295. 		int i;

  1296. 		uint8_t *srcPtr= src[0];

  1297. 		uint8_t *dstPtr= dst[0] + dstStride[0]*srcSliceY;

  1298. 

  1299. 		for(i=0; i<srcSliceH; i++)

  1300. 		{

  1301. 			rgb32to24(srcPtr, dstPtr, c->srcW<<2);

  1302. 			srcPtr+= srcStride[0];

  1303. 			dstPtr+= dstStride[0];

  1304. 		}

  1305. 	}     

  1306. }

  1307. 

  1308. static void bgr15to16Wrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1309.              int srcSliceH, uint8_t* dst[], int dstStride[]){

  1310. 	

  1311. 	if(dstStride[0]==srcStride[0])

  1312. 		rgb15to16(src[0], dst[0] + dstStride[0]*srcSliceY, srcSliceH*srcStride[0]);

  1313. 	else

  1314. 	{

  1315. 		int i;

  1316. 		uint8_t *srcPtr= src[0];

  1317. 		uint8_t *dstPtr= dst[0] + dstStride[0]*srcSliceY;

  1318. 

  1319. 		for(i=0; i<srcSliceH; i++)

  1320. 		{

  1321. 			rgb15to16(srcPtr, dstPtr, c->srcW<<1);

  1322. 			srcPtr+= srcStride[0];

  1323. 			dstPtr+= dstStride[0];

  1324. 		}

  1325. 	}     

  1326. }

  1327. 

  1328. static void bgr24toyv12Wrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1329.              int srcSliceH, uint8_t* dst[], int dstStride[]){

  1330. 

  1331. 	rgb24toyv12(

  1332. 		src[0], 

  1333. 		dst[0]+ srcSliceY    *dstStride[0], 

  1334. 		dst[1]+(srcSliceY>>1)*dstStride[1], 

  1335. 		dst[2]+(srcSliceY>>1)*dstStride[2],

  1336. 		c->srcW, srcSliceH, 

  1337. 		dstStride[0], dstStride[1], srcStride[0]);

  1338. }

  1339. 

  1340. 

  1341. /* unscaled copy like stuff (assumes nearly identical formats) */

  1342. static void simpleCopy(SwsContext *c, uint8_t* srcParam[], int srcStrideParam[], int srcSliceY,

  1343.              int srcSliceH, uint8_t* dstParam[], int dstStride[]){

  1344. 

  1345. 	int srcStride[3];

  1346. 	uint8_t *src[3];

  1347. 	uint8_t *dst[3];

  1348. 

  1349. 	if(c->srcFormat == IMGFMT_I420){

  1350. 		src[0]= srcParam[0];

  1351. 		src[1]= srcParam[2];

  1352. 		src[2]= srcParam[1];

  1353. 		srcStride[0]= srcStrideParam[0];

  1354. 		srcStride[1]= srcStrideParam[2];

  1355. 		srcStride[2]= srcStrideParam[1];

  1356. 	}

  1357. 	else if(c->srcFormat==IMGFMT_YV12){

  1358. 		src[0]= srcParam[0];

  1359. 		src[1]= srcParam[1];

  1360. 		src[2]= srcParam[2];

  1361. 		srcStride[0]= srcStrideParam[0];

  1362. 		srcStride[1]= srcStrideParam[1];

  1363. 		srcStride[2]= srcStrideParam[2];

  1364. 	}

  1365. 	else if(isPacked(c->srcFormat) || isGray(c->srcFormat)){

  1366. 		src[0]= srcParam[0];

  1367. 		src[1]=

  1368. 		src[2]= NULL;

  1369. 		srcStride[0]= srcStrideParam[0];

  1370. 		srcStride[1]=

  1371. 		srcStride[2]= 0;

  1372. 	}

  1373. 

  1374. 	if(c->dstFormat == IMGFMT_I420){

  1375. 		dst[0]= dstParam[0];

  1376. 		dst[1]= dstParam[2];

  1377. 		dst[2]= dstParam[1];

  1378. 		

  1379. 	}else{

  1380. 		dst[0]= dstParam[0];

  1381. 		dst[1]= dstParam[1];

  1382. 		dst[2]= dstParam[2];

  1383. 	}

  1384. 

  1385. 	if(isPacked(c->srcFormat))

  1386. 	{

  1387. 		if(dstStride[0]==srcStride[0])

  1388. 			memcpy(dst[0] + dstStride[0]*srcSliceY, src[0], srcSliceH*dstStride[0]);

  1389. 		else

  1390. 		{

  1391. 			int i;

  1392. 			uint8_t *srcPtr= src[0];

  1393. 			uint8_t *dstPtr= dst[0] + dstStride[0]*srcSliceY;

  1394. 			int length=0;

  1395. 

  1396. 			/* universal length finder */

  1397. 			while(length+c->srcW <= ABS(dstStride[0]) 

  1398. 			   && length+c->srcW <= ABS(srcStride[0])) length+= c->srcW;

  1399. 			ASSERT(length!=0);

  1400. 

  1401. 			for(i=0; i<srcSliceH; i++)

  1402. 			{

  1403. 				memcpy(dstPtr, srcPtr, length);

  1404. 				srcPtr+= srcStride[0];

  1405. 				dstPtr+= dstStride[0];

  1406. 			}

  1407. 		}

  1408. 	}

  1409. 	else 

  1410. 	{ /* Planar YUV */

  1411. 		int plane;

  1412. 		for(plane=0; plane<3; plane++)

  1413. 		{

  1414. 			int length= plane==0 ? c->srcW  : ((c->srcW+1)>>1);

  1415. 			int y=      plane==0 ? srcSliceY: ((srcSliceY+1)>>1);

  1416. 			int height= plane==0 ? srcSliceH: ((srcSliceH+1)>>1);

  1417. 

  1418. 			if(dstStride[plane]==srcStride[plane])

  1419. 				memcpy(dst[plane] + dstStride[plane]*y, src[plane], height*dstStride[plane]);

  1420. 			else

  1421. 			{

  1422. 				int i;

  1423. 				uint8_t *srcPtr= src[plane];

  1424. 				uint8_t *dstPtr= dst[plane] + dstStride[plane]*y;

  1425. 				for(i=0; i<height; i++)

  1426. 				{

  1427. 					memcpy(dstPtr, srcPtr, length);

  1428. 					srcPtr+= srcStride[plane];

  1429. 					dstPtr+= dstStride[plane];

  1430. 				}

  1431. 			}

  1432. 		}

  1433. 	}

  1434. }

  1435. 

  1436. SwsContext *getSwsContext(int srcW, int srcH, int srcFormat, int dstW, int dstH, int dstFormat, int flags,

  1437.                          SwsFilter *srcFilter, SwsFilter *dstFilter){

  1438. 

  1439. 	SwsContext *c;

  1440. 	int i;

  1441. 	int usesFilter;

  1442. 	SwsFilter dummyFilter= {NULL, NULL, NULL, NULL};

  1443. 

  1444. #ifdef ARCH_X86

  1445. 	if(gCpuCaps.hasMMX)

  1446. 		asm volatile("emms\n\t"::: "memory");

  1447. #endif

  1448. 

  1449. 	if(swScale==NULL) globalInit();

  1450. 

  1451. 	/* avoid dupplicate Formats, so we dont need to check to much */

  1452. 	if(srcFormat==IMGFMT_IYUV) srcFormat=IMGFMT_I420;

  1453. 	if(srcFormat==IMGFMT_Y8)   srcFormat=IMGFMT_Y800;

  1454. 	if(dstFormat==IMGFMT_Y8)   dstFormat=IMGFMT_Y800;

  1455. 

  1456. 	if(!isSupportedIn(srcFormat)) 

  1457. 	{

  1458. 		mp_msg(MSGT_SWS,MSGL_ERR,"swScaler: %s is not supported as input format\n", vo_format_name(srcFormat));

  1459. 		return NULL;

  1460. 	}

  1461. 	if(!isSupportedOut(dstFormat))

  1462. 	{

  1463. 		 mp_msg(MSGT_SWS,MSGL_ERR,"swScaler: %s is not supported as output format\n", vo_format_name(dstFormat));

  1464. 		return NULL;

  1465. 	}

  1466. 

  1467. 	/* sanity check */

  1468. 	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

  1469. 	{

  1470. 		 mp_msg(MSGT_SWS,MSGL_ERR,"swScaler: %dx%d -> %dx%d is invalid scaling dimension\n", 

  1471. 			srcW, srcH, dstW, dstH);

  1472. 		return NULL;

  1473. 	}

  1474. 

  1475. 	if(!dstFilter) dstFilter= &dummyFilter;

  1476. 	if(!srcFilter) srcFilter= &dummyFilter;

  1477. 

  1478. 	c= memalign(64, sizeof(SwsContext));

  1479. 	memset(c, 0, sizeof(SwsContext));

  1480. 

  1481. 	c->srcW= srcW;

  1482. 	c->srcH= srcH;

  1483. 	c->dstW= dstW;

  1484. 	c->dstH= dstH;

  1485. 	c->lumXInc= ((srcW<<16) + (dstW>>1))/dstW;

  1486. 	c->lumYInc= ((srcH<<16) + (dstH>>1))/dstH;

  1487. 	c->flags= flags;

  1488. 	c->dstFormat= dstFormat;

  1489. 	c->srcFormat= srcFormat;

  1490. 

  1491. 	usesFilter=0;

  1492. 	if(dstFilter->lumV!=NULL && dstFilter->lumV->length>1) usesFilter=1;

  1493. 	if(dstFilter->lumH!=NULL && dstFilter->lumH->length>1) usesFilter=1;

  1494. 	if(dstFilter->chrV!=NULL && dstFilter->chrV->length>1) usesFilter=1;

  1495. 	if(dstFilter->chrH!=NULL && dstFilter->chrH->length>1) usesFilter=1;

  1496. 	if(srcFilter->lumV!=NULL && srcFilter->lumV->length>1) usesFilter=1;

  1497. 	if(srcFilter->lumH!=NULL && srcFilter->lumH->length>1) usesFilter=1;

  1498. 	if(srcFilter->chrV!=NULL && srcFilter->chrV->length>1) usesFilter=1;

  1499. 	if(srcFilter->chrH!=NULL && srcFilter->chrH->length>1) usesFilter=1;

  1500. 	

  1501. 	/* unscaled special Cases */

  1502. 	if(srcW==dstW && srcH==dstH && !usesFilter)

  1503. 	{

  1504. 		/* yuv2bgr */

  1505. 		if(isPlanarYUV(srcFormat) && isBGR(dstFormat))

  1506. 		{

  1507. 			// FIXME multiple yuv2rgb converters wont work that way cuz that thing is full of globals&statics

  1508. #ifdef WORDS_BIGENDIAN

  1509. 			if(dstFormat==IMGFMT_BGR32)

  1510. 				yuv2rgb_init( dstFormat&0xFF /* =bpp */, MODE_BGR);

  1511. 			else

  1512. 				yuv2rgb_init( dstFormat&0xFF /* =bpp */, MODE_RGB);

  1513. #else

  1514. 			yuv2rgb_init( dstFormat&0xFF /* =bpp */, MODE_RGB);

  1515. #endif

  1516. 			c->swScale= planarYuvToBgr;

  1517. 

  1518. 			if(flags&SWS_PRINT_INFO)

  1519. 				mp_msg(MSGT_SWS,MSGL_V,"SwScaler: using unscaled %s -> %s special converter\n", 

  1520. 					vo_format_name(srcFormat), vo_format_name(dstFormat));

  1521. 			return c;

  1522. 		}

  1523. 

  1524. 		/* simple copy */

  1525. 		if(srcFormat == dstFormat || (isPlanarYUV(srcFormat) && isPlanarYUV(dstFormat)))

  1526. 		{

  1527. 			c->swScale= simpleCopy;

  1528. 

  1529. 			if(flags&SWS_PRINT_INFO)

  1530. 				mp_msg(MSGT_SWS,MSGL_V,"SwScaler: using unscaled %s -> %s special converter\n", 

  1531. 					vo_format_name(srcFormat), vo_format_name(dstFormat));

  1532. 			return c;

  1533. 		}

  1534. 		

  1535. 		/* bgr32to24 & rgb32to24*/

  1536. 		if((srcFormat==IMGFMT_BGR32 && dstFormat==IMGFMT_BGR24)

  1537. 		 ||(srcFormat==IMGFMT_RGB32 && dstFormat==IMGFMT_RGB24))

  1538. 		{

  1539. 			c->swScale= bgr32to24Wrapper;

  1540. 

  1541. 			if(flags&SWS_PRINT_INFO)

  1542. 				mp_msg(MSGT_SWS,MSGL_V,"SwScaler: using unscaled %s -> %s special converter\n", 

  1543. 					vo_format_name(srcFormat), vo_format_name(dstFormat));

  1544. 			return c;

  1545. 		}

  1546. 		

  1547. 		/* bgr24to32 & rgb24to32*/

  1548. 		if((srcFormat==IMGFMT_BGR24 && dstFormat==IMGFMT_BGR32)

  1549. 		 ||(srcFormat==IMGFMT_RGB24 && dstFormat==IMGFMT_RGB32))

  1550. 		{

  1551. 			c->swScale= bgr24to32Wrapper;

  1552. 

  1553. 			if(flags&SWS_PRINT_INFO)

  1554. 				mp_msg(MSGT_SWS,MSGL_V,"SwScaler: using unscaled %s -> %s special converter\n", 

  1555. 					vo_format_name(srcFormat), vo_format_name(dstFormat));

  1556. 			return c;

  1557. 		}

  1558. 

  1559. 		/* bgr15to16 */

  1560. 		if(srcFormat==IMGFMT_BGR15 && dstFormat==IMGFMT_BGR16)

  1561. 		{

  1562. 			c->swScale= bgr15to16Wrapper;

  1563. 

  1564. 			if(flags&SWS_PRINT_INFO)

  1565. 				mp_msg(MSGT_SWS,MSGL_V,"SwScaler: using unscaled %s -> %s special converter\n", 

  1566. 					vo_format_name(srcFormat), vo_format_name(dstFormat));

  1567. 			return c;

  1568. 		}

  1569. 

  1570. 		/* bgr24toYV12 */

  1571. 		if(srcFormat==IMGFMT_BGR24 && dstFormat==IMGFMT_YV12)

  1572. 		{

  1573. 			c->swScale= bgr24toyv12Wrapper;

  1574. 

  1575. 			if(flags&SWS_PRINT_INFO)

  1576. 				mp_msg(MSGT_SWS,MSGL_V,"SwScaler: using unscaled %s -> %s special converter\n", 

  1577. 					vo_format_name(srcFormat), vo_format_name(dstFormat));

  1578. 			return c;

  1579. 		}

  1580. 	}

  1581. 

  1582. 	if(cpuCaps.hasMMX2)

  1583. 	{

  1584. 		c->canMMX2BeUsed= (dstW >=srcW && (dstW&31)==0 && (srcW&15)==0) ? 1 : 0;

  1585. 		if(!c->canMMX2BeUsed && dstW >=srcW && (srcW&15)==0 && (flags&SWS_FAST_BILINEAR))

  1586. 		{

  1587. 			if(flags&SWS_PRINT_INFO)

  1588. 				mp_msg(MSGT_SWS,MSGL_WARN,"SwScaler: output Width is not a multiple of 32 -> no MMX2 scaler\n");

  1589. 		}

  1590. 	}

  1591. 	else

  1592. 		c->canMMX2BeUsed=0;

  1593. 

  1594. 

  1595. 	/* dont use full vertical UV input/internaly if the source doesnt even have it */

  1596. 	if(isHalfChrV(srcFormat)) c->flags= flags= flags&(~SWS_FULL_CHR_V);

  1597. 	/* dont use full horizontal UV input if the source doesnt even have it */

  1598. 	if(isHalfChrH(srcFormat)) c->flags= flags= flags&(~SWS_FULL_CHR_H_INP);

  1599. 	/* dont use full horizontal UV internally if the destination doesnt even have it */

  1600. 	if(isHalfChrH(dstFormat)) c->flags= flags= flags&(~SWS_FULL_CHR_H_INT);

  1601. 

  1602. 	if(flags&SWS_FULL_CHR_H_INP)	c->chrSrcW= srcW;

  1603. 	else				c->chrSrcW= (srcW+1)>>1;

  1604. 

  1605. 	if(flags&SWS_FULL_CHR_H_INT)	c->chrDstW= dstW;

  1606. 	else				c->chrDstW= (dstW+1)>>1;

  1607. 

  1608. 	if(flags&SWS_FULL_CHR_V)	c->chrSrcH= srcH;

  1609. 	else				c->chrSrcH= (srcH+1)>>1;

  1610. 

  1611. 	if(isHalfChrV(dstFormat))	c->chrDstH= (dstH+1)>>1;

  1612. 	else				c->chrDstH= dstH;

  1613. 

  1614. 	c->chrXInc= ((c->chrSrcW<<16) + (c->chrDstW>>1))/c->chrDstW;

  1615. 	c->chrYInc= ((c->chrSrcH<<16) + (c->chrDstH>>1))/c->chrDstH;

  1616. 

  1617. 

  1618. 	// match pixel 0 of the src to pixel 0 of dst and match pixel n-2 of src to pixel n-2 of dst

  1619. 	// but only for the FAST_BILINEAR mode otherwise do correct scaling

  1620. 	// n-2 is the last chrominance sample available

  1621. 	// this is not perfect, but noone shuld notice the difference, the more correct variant

  1622. 	// would be like the vertical one, but that would require some special code for the

  1623. 	// first and last pixel

  1624. 	if(flags&SWS_FAST_BILINEAR)

  1625. 	{

  1626. 		if(c->canMMX2BeUsed)

  1627. 		{

  1628. 			c->lumXInc+= 20;

  1629. 			c->chrXInc+= 20;

  1630. 		}

  1631. 		//we dont use the x86asm scaler if mmx is available

  1632. 		else if(cpuCaps.hasMMX)

  1633. 		{

  1634. 			c->lumXInc = ((srcW-2)<<16)/(dstW-2) - 20;

  1635. 			c->chrXInc = ((c->chrSrcW-2)<<16)/(c->chrDstW-2) - 20;

  1636. 		}

  1637. 	}

  1638. 

  1639. 	/* precalculate horizontal scaler filter coefficients */

  1640. 	{

  1641. 		const int filterAlign= cpuCaps.hasMMX ? 4 : 1;

  1642. 

  1643. 		initFilter(&c->hLumFilter, &c->hLumFilterPos, &c->hLumFilterSize, c->lumXInc,

  1644. 				 srcW      ,       dstW, filterAlign, 1<<14, flags,

  1645. 				 srcFilter->lumH, dstFilter->lumH);

  1646. 		initFilter(&c->hChrFilter, &c->hChrFilterPos, &c->hChrFilterSize, c->chrXInc,

  1647. 				(srcW+1)>>1, c->chrDstW, filterAlign, 1<<14, flags,

  1648. 				 srcFilter->chrH, dstFilter->chrH);

  1649. 

  1650. #ifdef ARCH_X86

  1651. // cant downscale !!!

  1652. 		if(c->canMMX2BeUsed && (flags & SWS_FAST_BILINEAR))

  1653. 		{

  1654. 			c->lumMmx2Filter   = (int16_t*)memalign(8, (dstW        /8+8)*sizeof(int16_t));

  1655. 			c->chrMmx2Filter   = (int16_t*)memalign(8, (c->chrDstW  /4+8)*sizeof(int16_t));

  1656. 			c->lumMmx2FilterPos= (int32_t*)memalign(8, (dstW      /2/8+8)*sizeof(int32_t));

  1657. 			c->chrMmx2FilterPos= (int32_t*)memalign(8, (c->chrDstW/2/4+8)*sizeof(int32_t));

  1658. 

  1659. 			initMMX2HScaler(      dstW, c->lumXInc, c->funnyYCode , c->lumMmx2Filter, c->lumMmx2FilterPos, 8);

  1660. 			initMMX2HScaler(c->chrDstW, c->chrXInc, c->funnyUVCode, c->chrMmx2Filter, c->chrMmx2FilterPos, 4);

  1661. 		}

  1662. #endif

  1663. 	} // Init Horizontal stuff

  1664. 

  1665. 

  1666. 

  1667. 	/* precalculate vertical scaler filter coefficients */

  1668. 	initFilter(&c->vLumFilter, &c->vLumFilterPos, &c->vLumFilterSize, c->lumYInc,

  1669. 			srcH      ,        dstH, 1, (1<<12)-4, flags,

  1670. 			srcFilter->lumV, dstFilter->lumV);

  1671. 	initFilter(&c->vChrFilter, &c->vChrFilterPos, &c->vChrFilterSize, c->chrYInc,

  1672. 			(srcH+1)>>1, c->chrDstH, 1, (1<<12)-4, flags,

  1673. 			 srcFilter->chrV, dstFilter->chrV);

  1674. 

  1675. 	// Calculate Buffer Sizes so that they wont run out while handling these damn slices

  1676. 	c->vLumBufSize= c->vLumFilterSize;

  1677. 	c->vChrBufSize= c->vChrFilterSize;

  1678. 	for(i=0; i<dstH; i++)

  1679. 	{

  1680. 		int chrI= i*c->chrDstH / dstH;

  1681. 		int nextSlice= MAX(c->vLumFilterPos[i   ] + c->vLumFilterSize - 1,

  1682. 				 ((c->vChrFilterPos[chrI] + c->vChrFilterSize - 1)<<1));

  1683. 		nextSlice&= ~1; // Slices start at even boundaries

  1684. 		if(c->vLumFilterPos[i   ] + c->vLumBufSize < nextSlice)

  1685. 			c->vLumBufSize= nextSlice - c->vLumFilterPos[i   ];

  1686. 		if(c->vChrFilterPos[chrI] + c->vChrBufSize < (nextSlice>>1))

  1687. 			c->vChrBufSize= (nextSlice>>1) - c->vChrFilterPos[chrI];

  1688. 	}

  1689. 

  1690. 	// allocate pixbufs (we use dynamic allocation because otherwise we would need to

  1691. 	c->lumPixBuf= (int16_t**)memalign(4, c->vLumBufSize*2*sizeof(int16_t*));

  1692. 	c->chrPixBuf= (int16_t**)memalign(4, c->vChrBufSize*2*sizeof(int16_t*));

  1693. 	//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)

  1694. 	for(i=0; i<c->vLumBufSize; i++)

  1695. 		c->lumPixBuf[i]= c->lumPixBuf[i+c->vLumBufSize]= (uint16_t*)memalign(8, 4000);

  1696. 	for(i=0; i<c->vChrBufSize; i++)

  1697. 		c->chrPixBuf[i]= c->chrPixBuf[i+c->vChrBufSize]= (uint16_t*)memalign(8, 8000);

  1698. 

  1699. 	//try to avoid drawing green stuff between the right end and the stride end

  1700. 	for(i=0; i<c->vLumBufSize; i++) memset(c->lumPixBuf[i], 0, 4000);

  1701. 	for(i=0; i<c->vChrBufSize; i++) memset(c->chrPixBuf[i], 64, 8000);

  1702. 

  1703. 	ASSERT(c->chrDstH <= dstH)

  1704. 

  1705. 	// pack filter data for mmx code

  1706. 	if(cpuCaps.hasMMX)

  1707. 	{

  1708. 		c->lumMmxFilter= (int16_t*)memalign(8, c->vLumFilterSize*      dstH*4*sizeof(int16_t));

  1709. 		c->chrMmxFilter= (int16_t*)memalign(8, c->vChrFilterSize*c->chrDstH*4*sizeof(int16_t));

  1710. 		for(i=0; i<c->vLumFilterSize*dstH; i++)

  1711. 			c->lumMmxFilter[4*i]=c->lumMmxFilter[4*i+1]=c->lumMmxFilter[4*i+2]=c->lumMmxFilter[4*i+3]=

  1712. 				c->vLumFilter[i];

  1713. 		for(i=0; i<c->vChrFilterSize*c->chrDstH; i++)

  1714. 			c->chrMmxFilter[4*i]=c->chrMmxFilter[4*i+1]=c->chrMmxFilter[4*i+2]=c->chrMmxFilter[4*i+3]=

  1715. 				c->vChrFilter[i];

  1716. 	}

  1717. 

  1718. 	if(flags&SWS_PRINT_INFO)

  1719. 	{

  1720. #ifdef DITHER1XBPP

  1721. 		char *dither= " dithered";

  1722. #else

  1723. 		char *dither= "";

  1724. #endif

  1725. 		if(flags&SWS_FAST_BILINEAR)

  1726. 			mp_msg(MSGT_SWS,MSGL_INFO,"SwScaler: FAST_BILINEAR scaler, ");

  1727. 		else if(flags&SWS_BILINEAR)

  1728. 			mp_msg(MSGT_SWS,MSGL_INFO,"SwScaler: BILINEAR scaler, ");

  1729. 		else if(flags&SWS_BICUBIC)

  1730. 			mp_msg(MSGT_SWS,MSGL_INFO,"SwScaler: BICUBIC scaler, ");

  1731. 		else if(flags&SWS_X)

  1732. 			mp_msg(MSGT_SWS,MSGL_INFO,"SwScaler: Experimental scaler, ");

  1733. 		else if(flags&SWS_POINT)

  1734. 			mp_msg(MSGT_SWS,MSGL_INFO,"SwScaler: Nearest Neighbor / POINT scaler, ");

  1735. 		else if(flags&SWS_AREA)

  1736. 			mp_msg(MSGT_SWS,MSGL_INFO,"SwScaler: Area Averageing scaler, ");

  1737. 		else

  1738. 			mp_msg(MSGT_SWS,MSGL_INFO,"SwScaler: ehh flags invalid?! ");

  1739. 

  1740. 		mp_msg(MSGT_SWS,MSGL_INFO,"%dx%d %s -> %dx%d%s %s ", 

  1741. 			srcW,srcH, vo_format_name(srcFormat), dstW,dstH,

  1742. 			(dstFormat==IMGFMT_BGR15 || dstFormat==IMGFMT_BGR16) ?

  1743. 			dither : "", vo_format_name(dstFormat));

  1744. 

  1745. 		if(cpuCaps.hasMMX2)

  1746. 			mp_msg(MSGT_SWS,MSGL_INFO,"using MMX2\n");

  1747. 		else if(cpuCaps.has3DNow)

  1748. 			mp_msg(MSGT_SWS,MSGL_INFO,"using 3DNOW\n");

  1749. 		else if(cpuCaps.hasMMX)

  1750. 			mp_msg(MSGT_SWS,MSGL_INFO,"using MMX\n");

  1751. 		else

  1752. 			mp_msg(MSGT_SWS,MSGL_INFO,"using C\n");

  1753. 	}

  1754. 

  1755. 	if((flags & SWS_PRINT_INFO) && verbose)

  1756. 	{

  1757. 		if(cpuCaps.hasMMX)

  1758. 		{

  1759. 			if(c->canMMX2BeUsed && (flags&SWS_FAST_BILINEAR))

  1760. 				mp_msg(MSGT_SWS,MSGL_V,"SwScaler: using FAST_BILINEAR MMX2 scaler for horizontal scaling\n");

  1761. 			else

  1762. 			{

  1763. 				if(c->hLumFilterSize==4)

  1764. 					mp_msg(MSGT_SWS,MSGL_V,"SwScaler: using 4-tap MMX scaler for horizontal luminance scaling\n");

  1765. 				else if(c->hLumFilterSize==8)

  1766. 					mp_msg(MSGT_SWS,MSGL_V,"SwScaler: using 8-tap MMX scaler for horizontal luminance scaling\n");

  1767. 				else

  1768. 					mp_msg(MSGT_SWS,MSGL_V,"SwScaler: using n-tap MMX scaler for horizontal luminance scaling\n");

  1769. 

  1770. 				if(c->hChrFilterSize==4)

  1771. 					mp_msg(MSGT_SWS,MSGL_V,"SwScaler: using 4-tap MMX scaler for horizontal chrominance scaling\n");

  1772. 				else if(c->hChrFilterSize==8)

  1773. 					mp_msg(MSGT_SWS,MSGL_V,"SwScaler: using 8-tap MMX scaler for horizontal chrominance scaling\n");

  1774. 				else

  1775. 					mp_msg(MSGT_SWS,MSGL_V,"SwScaler: using n-tap MMX scaler for horizontal chrominance scaling\n");

  1776. 			}

  1777. 		}

  1778. 		else

  1779. 		{

  1780. #ifdef ARCH_X86

  1781. 			mp_msg(MSGT_SWS,MSGL_V,"SwScaler: using X86-Asm scaler for horizontal scaling\n");

  1782. #else

  1783. 			if(flags & SWS_FAST_BILINEAR)

  1784. 				mp_msg(MSGT_SWS,MSGL_V,"SwScaler: using FAST_BILINEAR C scaler for horizontal scaling\n");

  1785. 			else

  1786. 				mp_msg(MSGT_SWS,MSGL_V,"SwScaler: using C scaler for horizontal scaling\n");

  1787. #endif

  1788. 		}

  1789. 		if(isPlanarYUV(dstFormat))

  1790. 		{

  1791. 			if(c->vLumFilterSize==1)

  1792. 				mp_msg(MSGT_SWS,MSGL_V,"SwScaler: using 1-tap %s \"scaler\" for vertical scaling (YV12 like)\n", cpuCaps.hasMMX ? "MMX" : "C");

  1793. 			else

  1794. 				mp_msg(MSGT_SWS,MSGL_V,"SwScaler: using n-tap %s scaler for vertical scaling (YV12 like)\n", cpuCaps.hasMMX ? "MMX" : "C");

  1795. 		}

  1796. 		else

  1797. 		{

  1798. 			if(c->vLumFilterSize==1 && c->vChrFilterSize==2)

  1799. 				mp_msg(MSGT_SWS,MSGL_V,"SwScaler: using 1-tap %s \"scaler\" for vertical luminance scaling (BGR)\n"

  1800. 				       "SwScaler:       2-tap scaler for vertical chrominance scaling (BGR)\n",cpuCaps.hasMMX ? "MMX" : "C");

  1801. 			else if(c->vLumFilterSize==2 && c->vChrFilterSize==2)

  1802. 				mp_msg(MSGT_SWS,MSGL_V,"SwScaler: using 2-tap linear %s scaler for vertical scaling (BGR)\n", cpuCaps.hasMMX ? "MMX" : "C");

  1803. 			else

  1804. 				mp_msg(MSGT_SWS,MSGL_V,"SwScaler: using n-tap %s scaler for vertical scaling (BGR)\n", cpuCaps.hasMMX ? "MMX" : "C");

  1805. 		}

  1806. 

  1807. 		if(dstFormat==IMGFMT_BGR24)

  1808. 			mp_msg(MSGT_SWS,MSGL_V,"SwScaler: using %s YV12->BGR24 Converter\n",

  1809. 				cpuCaps.hasMMX2 ? "MMX2" : (cpuCaps.hasMMX ? "MMX" : "C"));

  1810. 		else if(dstFormat==IMGFMT_BGR32)

  1811. 			mp_msg(MSGT_SWS,MSGL_V,"SwScaler: using %s YV12->BGR32 Converter\n", cpuCaps.hasMMX ? "MMX" : "C");

  1812. 		else if(dstFormat==IMGFMT_BGR16)

  1813. 			mp_msg(MSGT_SWS,MSGL_V,"SwScaler: using %s YV12->BGR16 Converter\n", cpuCaps.hasMMX ? "MMX" : "C");

  1814. 		else if(dstFormat==IMGFMT_BGR15)

  1815. 			mp_msg(MSGT_SWS,MSGL_V,"SwScaler: using %s YV12->BGR15 Converter\n", cpuCaps.hasMMX ? "MMX" : "C");

  1816. 

  1817. 		mp_msg(MSGT_SWS,MSGL_V,"SwScaler: %dx%d -> %dx%d\n", srcW, srcH, dstW, dstH);

  1818. 	}

  1819. 	if((flags & SWS_PRINT_INFO) && verbose>1)

  1820. 	{

  1821. 		mp_msg(MSGT_SWS,MSGL_DBG2,"SwScaler:Lum srcW=%d srcH=%d dstW=%d dstH=%d xInc=%d yInc=%d\n",

  1822. 			c->srcW, c->srcH, c->dstW, c->dstH, c->lumXInc, c->lumYInc);

  1823. 		mp_msg(MSGT_SWS,MSGL_DBG2,"SwScaler:Chr srcW=%d srcH=%d dstW=%d dstH=%d xInc=%d yInc=%d\n",

  1824. 			c->chrSrcW, c->chrSrcH, c->chrDstW, c->chrDstH, c->chrXInc, c->chrYInc);

  1825. 	}

  1826. 

  1827. 	c->swScale= swScale;

  1828. 	return c;

  1829. }

  1830. 

  1831. /**

  1832.  * returns a normalized gaussian curve used to filter stuff

  1833.  * quality=3 is high quality, lowwer is lowwer quality

  1834.  */

  1835. 

  1836. SwsVector *getGaussianVec(double variance, double quality){

  1837. 	const int length= (int)(variance*quality + 0.5) | 1;

  1838. 	int i;

  1839. 	double *coeff= memalign(sizeof(double), length*sizeof(double));

  1840. 	double middle= (length-1)*0.5;

  1841. 	SwsVector *vec= malloc(sizeof(SwsVector));

  1842. 

  1843. 	vec->coeff= coeff;

  1844. 	vec->length= length;

  1845. 

  1846. 	for(i=0; i<length; i++)

  1847. 	{

  1848. 		double dist= i-middle;

  1849. 		coeff[i]= exp( -dist*dist/(2*variance*variance) ) / sqrt(2*variance*PI);

  1850. 	}

  1851. 

  1852. 	normalizeVec(vec, 1.0);

  1853. 

  1854. 	return vec;

  1855. }

  1856. 

  1857. SwsVector *getConstVec(double c, int length){

  1858. 	int i;

  1859. 	double *coeff= memalign(sizeof(double), length*sizeof(double));

  1860. 	SwsVector *vec= malloc(sizeof(SwsVector));

  1861. 

  1862. 	vec->coeff= coeff;

  1863. 	vec->length= length;

  1864. 

  1865. 	for(i=0; i<length; i++)

  1866. 		coeff[i]= c;

  1867. 

  1868. 	return vec;

  1869. }

  1870. 

  1871. 

  1872. SwsVector *getIdentityVec(void){

  1873. 	double *coeff= memalign(sizeof(double), sizeof(double));

  1874. 	SwsVector *vec= malloc(sizeof(SwsVector));

  1875. 	coeff[0]= 1.0;

  1876. 

  1877. 	vec->coeff= coeff;

  1878. 	vec->length= 1;

  1879. 

  1880. 	return vec;

  1881. }

  1882. 

  1883. void normalizeVec(SwsVector *a, double height){

  1884. 	int i;

  1885. 	double sum=0;

  1886. 	double inv;

  1887. 

  1888. 	for(i=0; i<a->length; i++)

  1889. 		sum+= a->coeff[i];

  1890. 

  1891. 	inv= height/sum;

  1892. 

  1893. 	for(i=0; i<a->length; i++)

  1894. 		a->coeff[i]*= height;

  1895. }

  1896. 

  1897. void scaleVec(SwsVector *a, double scalar){

  1898. 	int i;

  1899. 

  1900. 	for(i=0; i<a->length; i++)

  1901. 		a->coeff[i]*= scalar;

  1902. }

  1903. 

  1904. static SwsVector *getConvVec(SwsVector *a, SwsVector *b){

  1905. 	int length= a->length + b->length - 1;

  1906. 	double *coeff= memalign(sizeof(double), length*sizeof(double));

  1907. 	int i, j;

  1908. 	SwsVector *vec= malloc(sizeof(SwsVector));

  1909. 

  1910. 	vec->coeff= coeff;

  1911. 	vec->length= length;

  1912. 

  1913. 	for(i=0; i<length; i++) coeff[i]= 0.0;

  1914. 

  1915. 	for(i=0; i<a->length; i++)

  1916. 	{

  1917. 		for(j=0; j<b->length; j++)

  1918. 		{

  1919. 			coeff[i+j]+= a->coeff[i]*b->coeff[j];

  1920. 		}

  1921. 	}

  1922. 

  1923. 	return vec;

  1924. }

  1925. 

  1926. static SwsVector *sumVec(SwsVector *a, SwsVector *b){

  1927. 	int length= MAX(a->length, b->length);

  1928. 	double *coeff= memalign(sizeof(double), length*sizeof(double));

  1929. 	int i;

  1930. 	SwsVector *vec= malloc(sizeof(SwsVector));

  1931. 

  1932. 	vec->coeff= coeff;

  1933. 	vec->length= length;

  1934. 

  1935. 	for(i=0; i<length; i++) coeff[i]= 0.0;

  1936. 

  1937. 	for(i=0; i<a->length; i++) coeff[i + (length-1)/2 - (a->length-1)/2]+= a->coeff[i];

  1938. 	for(i=0; i<b->length; i++) coeff[i + (length-1)/2 - (b->length-1)/2]+= b->coeff[i];

  1939. 

  1940. 	return vec;

  1941. }

  1942. 

  1943. static SwsVector *diffVec(SwsVector *a, SwsVector *b){

  1944. 	int length= MAX(a->length, b->length);

  1945. 	double *coeff= memalign(sizeof(double), length*sizeof(double));

  1946. 	int i;

  1947. 	SwsVector *vec= malloc(sizeof(SwsVector));

  1948. 

  1949. 	vec->coeff= coeff;

  1950. 	vec->length= length;

  1951. 

  1952. 	for(i=0; i<length; i++) coeff[i]= 0.0;

  1953. 

  1954. 	for(i=0; i<a->length; i++) coeff[i + (length-1)/2 - (a->length-1)/2]+= a->coeff[i];

  1955. 	for(i=0; i<b->length; i++) coeff[i + (length-1)/2 - (b->length-1)/2]-= b->coeff[i];

  1956. 

  1957. 	return vec;

  1958. }

  1959. 

  1960. /* shift left / or right if "shift" is negative */

  1961. static SwsVector *getShiftedVec(SwsVector *a, int shift){

  1962. 	int length= a->length + ABS(shift)*2;

  1963. 	double *coeff= memalign(sizeof(double), length*sizeof(double));

  1964. 	int i;

  1965. 	SwsVector *vec= malloc(sizeof(SwsVector));

  1966. 

  1967. 	vec->coeff= coeff;

  1968. 	vec->length= length;

  1969. 

  1970. 	for(i=0; i<length; i++) coeff[i]= 0.0;

  1971. 

  1972. 	for(i=0; i<a->length; i++)

  1973. 	{

  1974. 		coeff[i + (length-1)/2 - (a->length-1)/2 - shift]= a->coeff[i];

  1975. 	}

  1976. 

  1977. 	return vec;

  1978. }

  1979. 

  1980. void shiftVec(SwsVector *a, int shift){

  1981. 	SwsVector *shifted= getShiftedVec(a, shift);

  1982. 	free(a->coeff);

  1983. 	a->coeff= shifted->coeff;

  1984. 	a->length= shifted->length;

  1985. 	free(shifted);

  1986. }

  1987. 

  1988. void addVec(SwsVector *a, SwsVector *b){

  1989. 	SwsVector *sum= sumVec(a, b);

  1990. 	free(a->coeff);

  1991. 	a->coeff= sum->coeff;

  1992. 	a->length= sum->length;

  1993. 	free(sum);

  1994. }

  1995. 

  1996. void subVec(SwsVector *a, SwsVector *b){

  1997. 	SwsVector *diff= diffVec(a, b);

  1998. 	free(a->coeff);

  1999. 	a->coeff= diff->coeff;

  2000. 	a->length= diff->length;

  2001. 	free(diff);

  2002. }

  2003. 

  2004. void convVec(SwsVector *a, SwsVector *b){

  2005. 	SwsVector *conv= getConvVec(a, b);

  2006. 	free(a->coeff);

  2007. 	a->coeff= conv->coeff;

  2008. 	a->length= conv->length;

  2009. 	free(conv);

  2010. }

  2011. 

  2012. SwsVector *cloneVec(SwsVector *a){

  2013. 	double *coeff= memalign(sizeof(double), a->length*sizeof(double));

  2014. 	int i;

  2015. 	SwsVector *vec= malloc(sizeof(SwsVector));

  2016. 

  2017. 	vec->coeff= coeff;

  2018. 	vec->length= a->length;

  2019. 

  2020. 	for(i=0; i<a->length; i++) coeff[i]= a->coeff[i];

  2021. 

  2022. 	return vec;

  2023. }

  2024. 

  2025. void printVec(SwsVector *a){

  2026. 	int i;

  2027. 	double max=0;

  2028. 	double min=0;

  2029. 	double range;

  2030. 

  2031. 	for(i=0; i<a->length; i++)

  2032. 		if(a->coeff[i]>max) max= a->coeff[i];

  2033. 

  2034. 	for(i=0; i<a->length; i++)

  2035. 		if(a->coeff[i]<min) min= a->coeff[i];

  2036. 

  2037. 	range= max - min;

  2038. 

  2039. 	for(i=0; i<a->length; i++)

  2040. 	{

  2041. 		int x= (int)((a->coeff[i]-min)*60.0/range +0.5);

  2042. 		printf("%1.3f ", a->coeff[i]);

  2043. 		for(;x>0; x--) printf(" ");

  2044. 		printf("|\n");

  2045. 	}

  2046. }

  2047. 

  2048. void freeVec(SwsVector *a){

  2049. 	if(!a) return;

  2050. 	if(a->coeff) free(a->coeff);

  2051. 	a->coeff=NULL;

  2052. 	a->length=0;

  2053. 	free(a);

  2054. }

  2055. 

  2056. void freeSwsContext(SwsContext *c){

  2057. 	int i;

  2058. 

  2059. 	if(!c) return;

  2060. 

  2061. 	if(c->lumPixBuf)

  2062. 	{

  2063. 		for(i=0; i<c->vLumBufSize; i++)

  2064. 		{

  2065. 			if(c->lumPixBuf[i]) free(c->lumPixBuf[i]);

  2066. 			c->lumPixBuf[i]=NULL;

  2067. 		}

  2068. 		free(c->lumPixBuf);

  2069. 		c->lumPixBuf=NULL;

  2070. 	}

  2071. 

  2072. 	if(c->chrPixBuf)

  2073. 	{

  2074. 		for(i=0; i<c->vChrBufSize; i++)

  2075. 		{

  2076. 			if(c->chrPixBuf[i]) free(c->chrPixBuf[i]);

  2077. 			c->chrPixBuf[i]=NULL;

  2078. 		}

  2079. 		free(c->chrPixBuf);

  2080. 		c->chrPixBuf=NULL;

  2081. 	}

  2082. 

  2083. 	if(c->vLumFilter) free(c->vLumFilter);

  2084. 	c->vLumFilter = NULL;

  2085. 	if(c->vChrFilter) free(c->vChrFilter);

  2086. 	c->vChrFilter = NULL;

  2087. 	if(c->hLumFilter) free(c->hLumFilter);

  2088. 	c->hLumFilter = NULL;

  2089. 	if(c->hChrFilter) free(c->hChrFilter);

  2090. 	c->hChrFilter = NULL;

  2091. 

  2092. 	if(c->vLumFilterPos) free(c->vLumFilterPos);

  2093. 	c->vLumFilterPos = NULL;

  2094. 	if(c->vChrFilterPos) free(c->vChrFilterPos);

  2095. 	c->vChrFilterPos = NULL;

  2096. 	if(c->hLumFilterPos) free(c->hLumFilterPos);

  2097. 	c->hLumFilterPos = NULL;

  2098. 	if(c->hChrFilterPos) free(c->hChrFilterPos);

  2099. 	c->hChrFilterPos = NULL;

  2100. 

  2101. 	if(c->lumMmxFilter) free(c->lumMmxFilter);

  2102. 	c->lumMmxFilter = NULL;

  2103. 	if(c->chrMmxFilter) free(c->chrMmxFilter);

  2104. 	c->chrMmxFilter = NULL;

  2105. 

  2106. 	if(c->lumMmx2Filter) free(c->lumMmx2Filter);

  2107. 	c->lumMmx2Filter=NULL;

  2108. 	if(c->chrMmx2Filter) free(c->chrMmx2Filter);

  2109. 	c->chrMmx2Filter=NULL;

  2110. 	if(c->lumMmx2FilterPos) free(c->lumMmx2FilterPos);

  2111. 	c->lumMmx2FilterPos=NULL;

  2112. 	if(c->chrMmx2FilterPos) free(c->chrMmx2FilterPos);

  2113. 	c->chrMmx2FilterPos=NULL;

  2114. 

  2115. 	free(c);

  2116. }

  2117.