falkTX
/
FFmpeg
mirror of https://github.com/falkTX/FFmpeg.git
1
0
Fork 0
Code Issues 0 Releases 338 Wiki Activity
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
451 Commits
32 Branches
802MB
Tree: 1e1c4fe926
Branches Tags
${ item.name }
Create branch ${ searchTerm }
from '1e1c4fe926'
${ noResults }
FFmpeg/postproc/swscale.c

2008 lines
55KB
Raw Blame History 

  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. #ifdef HAVE_MALLOC_H

  56. #include <malloc.h>

  57. #endif

  58. #include "swscale.h"

  59. #include "../cpudetect.h"

  60. #include "../bswap.h"

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

  62. #include "rgb2rgb.h"

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

  64. #undef MOVNTQ

  65. #undef PAVGB

  66. 

  67. //#undef HAVE_MMX2

  68. //#define HAVE_3DNOW

  69. //#undef HAVE_MMX

  70. //#undef ARCH_X86

  71. #define DITHER1XBPP

  72. 

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

  74. 

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

  76. 

  77. #ifdef MP_DEBUG

  78. #define ASSERT(x) if(!(x)) { printf("ASSERT " #x " failed\n"); *((int*)0)=0; }

  79. #else

  80. #define ASSERT(x) ;

  81. #endif

  82. 

  83. #ifdef M_PI

  84. #define PI M_PI

  85. #else

  86. #define PI 3.14159265358979323846

  87. #endif

  88. 

  89. //FIXME replace this with something faster

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

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

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

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

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

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

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

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

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

  99. 			|| (x)==IMGFMT_Y800)

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

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

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

  103. 

  104. #define RGB2YUV_SHIFT 16

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

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

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

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

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

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

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

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

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

  114. 

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

  116. /*

  117. NOTES

  118. 

  119. known BUGS with known cause (no bugreports please!, but patches are welcome :) )

  120. horizontal fast_bilinear MMX2 scaler reads 1-7 samples too much (might cause a sig11)

  121. 

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

  123. 

  124. TODO

  125. more intelligent missalignment avoidance for the horizontal scaler

  126. write special vertical cubic upscale version

  127. Optimize C code (yv12 / minmax)

  128. add support for packed pixel yuv input & output

  129. add support for Y8 output

  130. optimize bgr24 & bgr32

  131. add BGR4 output support

  132. write special BGR->BGR scaler

  133. deglobalize yuv2rgb*.c

  134. */

  135. 

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

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

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

  139. 

  140. #ifdef ARCH_X86

  141. #define CAN_COMPILE_X86_ASM

  142. #endif

  143. 

  144. #ifdef CAN_COMPILE_X86_ASM

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

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

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

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

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

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

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

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

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

  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. 

  198. // FIXME remove

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

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

  201. #endif

  202. 

  203. // clipping helper table for C implementations:

  204. static unsigned char clip_table[768];

  205. 

  206. static unsigned short clip_table16b[768];

  207. static unsigned short clip_table16g[768];

  208. static unsigned short clip_table16r[768];

  209. static unsigned short clip_table15b[768];

  210. static unsigned short clip_table15g[768];

  211. static unsigned short clip_table15r[768];

  212. 

  213. // yuv->rgb conversion tables:

  214. static    int yuvtab_2568[256];

  215. static    int yuvtab_3343[256];

  216. static    int yuvtab_0c92[256];

  217. static    int yuvtab_1a1e[256];

  218. static    int yuvtab_40cf[256];

  219. // Needed for cubic scaler to catch overflows

  220. static    int clip_yuvtab_2568[768];

  221. static    int clip_yuvtab_3343[768];

  222. static    int clip_yuvtab_0c92[768];

  223. static    int clip_yuvtab_1a1e[768];

  224. static    int clip_yuvtab_40cf[768];

  225. 

  226. //global sws_flags from the command line

  227. int sws_flags=2;

  228. 

  229. //global srcFilter

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

  231. 

  232. float sws_lum_gblur= 0.0;

  233. float sws_chr_gblur= 0.0;

  234. int sws_chr_vshift= 0;

  235. int sws_chr_hshift= 0;

  236. float sws_chr_sharpen= 0.0;

  237. float sws_lum_sharpen= 0.0;

  238. 

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

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

  241. static CpuCaps cpuCaps;

  242. 

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

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

  245. 

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

  247. 

  248. #ifdef CAN_COMPILE_X86_ASM

  249. void in_asm_used_var_warning_killer()

  250. {

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

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

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

  254.  if(i) i=0;

  255. }

  256. #endif

  257. 

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

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

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

  261. {

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

  263. 	int i;

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

  265. 	{

  266. 		int val=0;

  267. 		int j;

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

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

  270. 

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

  272. 	}

  273. 

  274. 	if(uDest != NULL)

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

  276. 		{

  277. 			int u=0;

  278. 			int v=0;

  279. 			int j;

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

  281. 			{

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

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

  284. 			}

  285. 

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

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

  288. 		}

  289. }

  290. 

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

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

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

  294. {

  295. 	if(dstFormat==IMGFMT_BGR32)

  296. 	{

  297. 		int i;

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

  299. 			int j;

  300. 			int Y1=0;

  301. 			int Y2=0;

  302. 			int U=0;

  303. 			int V=0;

  304. 			int Cb, Cr, Cg;

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

  306. 			{

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

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

  309. 			}

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

  311. 			{

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

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

  314. 			}

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

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

  317. 			U >>= 19;

  318. 			V >>= 19;

  319. 

  320. 			Cb= clip_yuvtab_40cf[U+ 256];

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

  322. 			Cr= clip_yuvtab_3343[V+ 256];

  323. 

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

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

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

  327. 

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

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

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

  331. 		}

  332. 	}

  333. 	else if(dstFormat==IMGFMT_BGR24)

  334. 	{

  335. 		int i;

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

  337. 			int j;

  338. 			int Y1=0;

  339. 			int Y2=0;

  340. 			int U=0;

  341. 			int V=0;

  342. 			int Cb, Cr, Cg;

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

  344. 			{

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

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

  347. 			}

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

  349. 			{

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

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

  352. 			}

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

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

  355. 			U >>= 19;

  356. 			V >>= 19;

  357. 

  358. 			Cb= clip_yuvtab_40cf[U+ 256];

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

  360. 			Cr= clip_yuvtab_3343[V+ 256];

  361. 

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

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

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

  365. 

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

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

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

  369. 			dest+=6;

  370. 		}

  371. 	}

  372. 	else if(dstFormat==IMGFMT_BGR16)

  373. 	{

  374. 		int i;

  375. #ifdef DITHER1XBPP

  376. 		static int ditherb1=1<<14;

  377. 		static int ditherg1=1<<13;

  378. 		static int ditherr1=2<<14;

  379. 		static int ditherb2=3<<14;

  380. 		static int ditherg2=3<<13;

  381. 		static int ditherr2=0<<14;

  382. 

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

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

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

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

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

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

  389. #else

  390. 		const int ditherb1=0;

  391. 		const int ditherg1=0;

  392. 		const int ditherr1=0;

  393. 		const int ditherb2=0;

  394. 		const int ditherg2=0;

  395. 		const int ditherr2=0;

  396. #endif

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

  398. 			int j;

  399. 			int Y1=0;

  400. 			int Y2=0;

  401. 			int U=0;

  402. 			int V=0;

  403. 			int Cb, Cr, Cg;

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

  405. 			{

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

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

  408. 			}

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

  410. 			{

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

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

  413. 			}

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

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

  416. 			U >>= 19;

  417. 			V >>= 19;

  418. 

  419. 			Cb= clip_yuvtab_40cf[U+ 256];

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

  421. 			Cr= clip_yuvtab_3343[V+ 256];

  422. 

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

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

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

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

  427. 

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

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

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

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

  432. 		}

  433. 	}

  434. 	else if(dstFormat==IMGFMT_BGR15)

  435. 	{

  436. 		int i;

  437. #ifdef DITHER1XBPP

  438. 		static int ditherb1=1<<14;

  439. 		static int ditherg1=1<<14;

  440. 		static int ditherr1=2<<14;

  441. 		static int ditherb2=3<<14;

  442. 		static int ditherg2=3<<14;

  443. 		static int ditherr2=0<<14;

  444. 

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

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

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

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

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

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

  451. #else

  452. 		const int ditherb1=0;

  453. 		const int ditherg1=0;

  454. 		const int ditherr1=0;

  455. 		const int ditherb2=0;

  456. 		const int ditherg2=0;

  457. 		const int ditherr2=0;

  458. #endif

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

  460. 			int j;

  461. 			int Y1=0;

  462. 			int Y2=0;

  463. 			int U=0;

  464. 			int V=0;

  465. 			int Cb, Cr, Cg;

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

  467. 			{

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

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

  470. 			}

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

  472. 			{

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

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

  475. 			}

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

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

  478. 			U >>= 19;

  479. 			V >>= 19;

  480. 

  481. 			Cb= clip_yuvtab_40cf[U+ 256];

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

  483. 			Cr= clip_yuvtab_3343[V+ 256];

  484. 

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

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

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

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

  489. 

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

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

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

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

  494. 		}

  495. 	}

  496. }

  497. 

  498. 

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

  500. //Plain C versions

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

  502. #define COMPILE_C

  503. #endif

  504. 

  505. #ifdef CAN_COMPILE_X86_ASM

  506. 

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

  508. #define COMPILE_MMX

  509. #endif

  510. 

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

  512. #define COMPILE_MMX2

  513. #endif

  514. 

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

  516. #define COMPILE_3DNOW

  517. #endif

  518. #endif //CAN_COMPILE_X86_ASM

  519. 

  520. #undef HAVE_MMX

  521. #undef HAVE_MMX2

  522. #undef HAVE_3DNOW

  523. 

  524. #ifdef COMPILE_C

  525. #undef HAVE_MMX

  526. #undef HAVE_MMX2

  527. #undef HAVE_3DNOW

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

  529. #include "swscale_template.c"

  530. #endif

  531. 

  532. #ifdef CAN_COMPILE_X86_ASM

  533. 

  534. //X86 versions

  535. /*

  536. #undef RENAME

  537. #undef HAVE_MMX

  538. #undef HAVE_MMX2

  539. #undef HAVE_3DNOW

  540. #define ARCH_X86

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

  542. #include "swscale_template.c"

  543. */

  544. //MMX versions

  545. #ifdef COMPILE_MMX

  546. #undef RENAME

  547. #define HAVE_MMX

  548. #undef HAVE_MMX2

  549. #undef HAVE_3DNOW

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

  551. #include "swscale_template.c"

  552. #endif

  553. 

  554. //MMX2 versions

  555. #ifdef COMPILE_MMX2

  556. #undef RENAME

  557. #define HAVE_MMX

  558. #define HAVE_MMX2

  559. #undef HAVE_3DNOW

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

  561. #include "swscale_template.c"

  562. #endif

  563. 

  564. //3DNOW versions

  565. #ifdef COMPILE_3DNOW

  566. #undef RENAME

  567. #define HAVE_MMX

  568. #undef HAVE_MMX2

  569. #define HAVE_3DNOW

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

  571. #include "swscale_template.c"

  572. #endif

  573. 

  574. #endif //CAN_COMPILE_X86_ASM

  575. 

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

  577. 

  578. 

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

  580. // will use sws_flags from the command line

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

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

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

  584. 

  585. 	static SwsContext *context=NULL;

  586. 	int dstFormat;

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

  588. 

  589. 	switch(dstbpp)

  590. 	{

  591. 		case 8 : dstFormat= IMGFMT_Y8;		break;

  592. 		case 12: dstFormat= IMGFMT_YV12;	break;

  593. 		case 15: dstFormat= IMGFMT_BGR15;	break;

  594. 		case 16: dstFormat= IMGFMT_BGR16;	break;

  595. 		case 24: dstFormat= IMGFMT_BGR24;	break;

  596. 		case 32: dstFormat= IMGFMT_BGR32;	break;

  597. 		default: return;

  598. 	}

  599. 

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

  601. 

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

  603. }

  604. 

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

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

  607. {

  608. 	int flags=0;

  609. 	static int firstTime=1;

  610. 

  611. #ifdef ARCH_X86

  612. 	if(gCpuCaps.hasMMX)

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

  614. #endif

  615. 	if(firstTime)

  616. 	{

  617. 		firstTime=0;

  618. 		flags= SWS_PRINT_INFO;

  619. 	}

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

  621. 

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

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

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

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

  626. 

  627. 	if(sws_lum_gblur!=0.0){

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

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

  630. 	}else{

  631. 		src_filter.lumH= getIdentityVec();

  632. 		src_filter.lumV= getIdentityVec();

  633. 	}

  634. 

  635. 	if(sws_chr_gblur!=0.0){

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

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

  638. 	}else{

  639. 		src_filter.chrH= getIdentityVec();

  640. 		src_filter.chrV= getIdentityVec();

  641. 	}

  642. 

  643. 	if(sws_chr_sharpen!=0.0){

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

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

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

  647. 		addVec(id, g);

  648. 		convVec(src_filter.chrH, id);

  649. 		convVec(src_filter.chrV, id);

  650. 		freeVec(g);

  651. 		freeVec(id);

  652. 	}

  653. 

  654. 	if(sws_lum_sharpen!=0.0){

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

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

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

  658. 		addVec(id, g);

  659. 		convVec(src_filter.lumH, id);

  660. 		convVec(src_filter.lumV, id);

  661. 		freeVec(g);

  662. 		freeVec(id);

  663. 	}

  664. 

  665. 	if(sws_chr_hshift)

  666. 		shiftVec(src_filter.chrH, sws_chr_hshift);

  667. 

  668. 	if(sws_chr_vshift)

  669. 		shiftVec(src_filter.chrV, sws_chr_vshift);

  670. 

  671. 	normalizeVec(src_filter.chrH, 1.0);

  672. 	normalizeVec(src_filter.chrV, 1.0);

  673. 	normalizeVec(src_filter.lumH, 1.0);

  674. 	normalizeVec(src_filter.lumV, 1.0);

  675. 

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

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

  678. 

  679. 	switch(sws_flags)

  680. 	{

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

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

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

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

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

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

  687. 		default:flags|= SWS_BILINEAR; break;

  688. 	}

  689. 

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

  691. }

  692. 

  693. 

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

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

  696. 			      SwsVector *srcFilter, SwsVector *dstFilter)

  697. {

  698. 	int i;

  699. 	int filterSize;

  700. 	int filter2Size;

  701. 	int minFilterSize;

  702. 	double *filter=NULL;

  703. 	double *filter2=NULL;

  704. #ifdef ARCH_X86

  705. 	if(gCpuCaps.hasMMX)

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

  707. #endif

  708. 

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

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

  711. 

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

  713. 	{

  714. 		int i;

  715. 		filterSize= 1;

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

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

  718. 

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

  720. 		{

  721. 			filter[i*filterSize]=1;

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

  723. 		}

  724. 

  725. 	}

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

  727. 	{

  728. 		int i;

  729. 		int xDstInSrc;

  730. 		filterSize= 1;

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

  732. 		

  733. 		xDstInSrc= xInc/2 - 0x8000;

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

  735. 		{

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

  737. 

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

  739. 			filter[i]= 1.0;

  740. 			xDstInSrc+= xInc;

  741. 		}

  742. 	}

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

  744. 	{

  745. 		int i;

  746. 		int xDstInSrc;

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

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

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

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

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

  752. 

  753. 		xDstInSrc= xInc/2 - 0x8000;

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

  755. 		{

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

  757. 			int j;

  758. 

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

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

  761. 			{

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

  763. 				double y1,y2,y3,y4;

  764. 				double A= -0.6;

  765. 				if(flags & SWS_BICUBIC){

  766. 						// Equation is from VirtualDub

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

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

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

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

  771. 				}else{

  772. 						// cubic interpolation (derived it myself)

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

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

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

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

  777. 				}

  778. 

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

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

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

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

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

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

  785. 			}

  786. 			else

  787. 			{

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

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

  790. 				{

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

  792. 					double coeff= 1.0 - d;

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

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

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

  796. 					xx++;

  797. 				}

  798. 			}

  799. 			xDstInSrc+= xInc;

  800. 		}

  801. 	}

  802. 	else // downscale

  803. 	{

  804. 		int xDstInSrc;

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

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

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

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

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

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

  811. 

  812. 		xDstInSrc= xInc/2 - 0x8000;

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

  814. 		{

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

  816. 			int j;

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

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

  819. 			{

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

  821. 				double coeff;

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

  823. 				{

  824. 					double A= -0.75;

  825. //					d*=2;

  826. 					// Equation is from VirtualDub

  827. 					if(d<1.0)

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

  829. 					else if(d<2.0)

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

  831. 					else

  832. 						coeff=0.0;

  833. 				}

  834. 				else if(flags & SWS_AREA)

  835. 				{

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

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

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

  839. 					else coeff=0.0;

  840. 				}

  841. 				else

  842. 				{

  843. 					coeff= 1.0 - d;

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

  845. 				}

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

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

  848. 				xx++;

  849. 			}

  850. 			xDstInSrc+= xInc;

  851. 		}

  852. 	}

  853. 

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

  855. 	   free(filter);

  856. 	*/

  857. 	filter2Size= filterSize;

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

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

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

  861. 

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

  863. 	{

  864. 		int j;

  865. 		SwsVector scaleFilter;

  866. 		SwsVector *outVec;

  867. 

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

  869. 		scaleFilter.length= filterSize;

  870. 

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

  872. 		else	      outVec= &scaleFilter;

  873. 

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

  875. 		//FIXME dstFilter

  876. 

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

  878. 		{

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

  880. 		}

  881. 

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

  883. 

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

  885. 	}

  886. 	free(filter); filter=NULL;

  887. 

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

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

  890. 	minFilterSize= 0;

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

  892. 	{

  893. 		int min= filter2Size;

  894. 		int j;

  895. 		double cutOff=0.0;

  896. 

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

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

  899. 		{

  900. 			int k;

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

  902. 

  903. 			if(cutOff > SWS_MAX_REDUCE_CUTOFF) break;

  904. 

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

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

  907. 

  908. 			// Move filter coeffs left

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

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

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

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

  913. 		}

  914. 

  915. 		cutOff=0.0;

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

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

  918. 		{

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

  920. 

  921. 			if(cutOff > SWS_MAX_REDUCE_CUTOFF) break;

  922. 			min--;

  923. 		}

  924. 

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

  926. 	}

  927. 

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

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

  930. 	*outFilterSize= filterSize;

  931. 

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

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

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

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

  936. 	{

  937. 		int j;

  938. 

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

  940. 		{

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

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

  943. 		}

  944. 	}

  945. 	free(filter2); filter2=NULL;

  946. 	

  947. 	ASSERT(filterSize > 0)

  948. 

  949. 	//FIXME try to align filterpos if possible

  950. 

  951. 	//fix borders

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

  953. 	{

  954. 		int j;

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

  956. 		{

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

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

  959. 			{

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

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

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

  963. 			}

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

  965. 		}

  966. 

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

  968. 		{

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

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

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

  972. 			{

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

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

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

  976. 			}

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

  978. 		}

  979. 	}

  980. 

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

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

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

  984. 

  985. 	/* Normalize & Store in outFilter */

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

  987. 	{

  988. 		int j;

  989. 		double sum=0;

  990. 		double scale= one;

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

  992. 		{

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

  994. 		}

  995. 		scale/= sum;

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

  997. 		{

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

  999. 		}

  1000. 	}

  1001. 	

  1002. 	(*filterPos)[dstW]= (*filterPos)[dstW-1]; // the MMX scaler will read over the end

  1003. 	for(i=0; i<*outFilterSize; i++)

  1004. 	{

  1005. 		int j= dstW*(*outFilterSize);

  1006. 		(*outFilter)[j + i]= (*outFilter)[j + i - (*outFilterSize)];

  1007. 	}

  1008. 

  1009. 	free(filter);

  1010. }

  1011. 

  1012. #ifdef ARCH_X86

  1013. static void initMMX2HScaler(int dstW, int xInc, uint8_t *funnyCode)

  1014. {

  1015. 	uint8_t *fragment;

  1016. 	int imm8OfPShufW1;

  1017. 	int imm8OfPShufW2;

  1018. 	int fragmentLength;

  1019. 

  1020. 	int xpos, i;

  1021. 

  1022. 	// create an optimized horizontal scaling routine

  1023. 

  1024. 	//code fragment

  1025. 

  1026. 	asm volatile(

  1027. 		"jmp 9f				\n\t"

  1028. 	// Begin

  1029. 		"0:				\n\t"

  1030. 		"movq (%%esi), %%mm0		\n\t" //FIXME Alignment

  1031. 		"movq %%mm0, %%mm1		\n\t"

  1032. 		"psrlq $8, %%mm0		\n\t"

  1033. 		"punpcklbw %%mm7, %%mm1	\n\t"

  1034. 		"movq %%mm2, %%mm3		\n\t"

  1035. 		"punpcklbw %%mm7, %%mm0	\n\t"

  1036. 		"addw %%bx, %%cx		\n\t" //2*xalpha += (4*lumXInc)&0xFFFF

  1037. 		"pshufw $0xFF, %%mm1, %%mm1	\n\t"

  1038. 		"1:				\n\t"

  1039. 		"adcl %%edx, %%esi		\n\t" //xx+= (4*lumXInc)>>16 + carry

  1040. 		"pshufw $0xFF, %%mm0, %%mm0	\n\t"

  1041. 		"2:				\n\t"

  1042. 		"psrlw $9, %%mm3		\n\t"

  1043. 		"psubw %%mm1, %%mm0		\n\t"

  1044. 		"pmullw %%mm3, %%mm0		\n\t"

  1045. 		"paddw %%mm6, %%mm2		\n\t" // 2*alpha += xpos&0xFFFF

  1046. 		"psllw $7, %%mm1		\n\t"

  1047. 		"paddw %%mm1, %%mm0		\n\t"

  1048. 

  1049. 		"movq %%mm0, (%%edi, %%eax)	\n\t"

  1050. 

  1051. 		"addl $8, %%eax			\n\t"

  1052. 	// End

  1053. 		"9:				\n\t"

  1054. //		"int $3\n\t"

  1055. 		"leal 0b, %0			\n\t"

  1056. 		"leal 1b, %1			\n\t"

  1057. 		"leal 2b, %2			\n\t"

  1058. 		"decl %1			\n\t"

  1059. 		"decl %2			\n\t"

  1060. 		"subl %0, %1			\n\t"

  1061. 		"subl %0, %2			\n\t"

  1062. 		"leal 9b, %3			\n\t"

  1063. 		"subl %0, %3			\n\t"

  1064. 		:"=r" (fragment), "=r" (imm8OfPShufW1), "=r" (imm8OfPShufW2),

  1065. 		"=r" (fragmentLength)

  1066. 	);

  1067. 

  1068. 	xpos= 0; //lumXInc/2 - 0x8000; // difference between pixel centers

  1069. 

  1070. 	for(i=0; i<dstW/8; i++)

  1071. 	{

  1072. 		int xx=xpos>>16;

  1073. 

  1074. 		if((i&3) == 0)

  1075. 		{

  1076. 			int a=0;

  1077. 			int b=((xpos+xInc)>>16) - xx;

  1078. 			int c=((xpos+xInc*2)>>16) - xx;

  1079. 			int d=((xpos+xInc*3)>>16) - xx;

  1080. 

  1081. 			memcpy(funnyCode + fragmentLength*i/4, fragment, fragmentLength);

  1082. 

  1083. 			funnyCode[fragmentLength*i/4 + imm8OfPShufW1]=

  1084. 			funnyCode[fragmentLength*i/4 + imm8OfPShufW2]=

  1085. 				a | (b<<2) | (c<<4) | (d<<6);

  1086. 

  1087. 			// if we dont need to read 8 bytes than dont :), reduces the chance of

  1088. 			// crossing a cache line

  1089. 			if(d<3) funnyCode[fragmentLength*i/4 + 1]= 0x6E;

  1090. 

  1091. 			funnyCode[fragmentLength*(i+4)/4]= RET;

  1092. 		}

  1093. 		xpos+=xInc;

  1094. 	}

  1095. }

  1096. #endif // ARCH_X86

  1097. 

  1098. //FIXME remove

  1099. void SwScale_Init(){

  1100. }

  1101. 

  1102. static void globalInit(){

  1103.     // generating tables:

  1104.     int i;

  1105.     for(i=0; i<768; i++){

  1106. 	int c= MIN(MAX(i-256, 0), 255);

  1107. 	clip_table[i]=c;

  1108. 	yuvtab_2568[c]= clip_yuvtab_2568[i]=(0x2568*(c-16))+(256<<13);

  1109. 	yuvtab_3343[c]= clip_yuvtab_3343[i]=0x3343*(c-128);

  1110. 	yuvtab_0c92[c]= clip_yuvtab_0c92[i]=-0x0c92*(c-128);

  1111. 	yuvtab_1a1e[c]= clip_yuvtab_1a1e[i]=-0x1a1e*(c-128);

  1112. 	yuvtab_40cf[c]= clip_yuvtab_40cf[i]=0x40cf*(c-128);

  1113.     }

  1114. 

  1115.     for(i=0; i<768; i++)

  1116.     {

  1117. 	int v= clip_table[i];

  1118. 	clip_table16b[i]= le2me_16( v>>3);

  1119. 	clip_table16g[i]= le2me_16((v<<3)&0x07E0);

  1120. 	clip_table16r[i]= le2me_16((v<<8)&0xF800);

  1121. 	clip_table15b[i]= le2me_16( v>>3);

  1122. 	clip_table15g[i]= le2me_16((v<<2)&0x03E0);

  1123. 	clip_table15r[i]= le2me_16((v<<7)&0x7C00);

  1124.     }

  1125. 

  1126. cpuCaps= gCpuCaps;

  1127. 

  1128. #ifdef RUNTIME_CPUDETECT

  1129. #ifdef CAN_COMPILE_X86_ASM

  1130. 	// ordered per speed fasterst first

  1131. 	if(gCpuCaps.hasMMX2)

  1132. 		swScale= swScale_MMX2;

  1133. 	else if(gCpuCaps.has3DNow)

  1134. 		swScale= swScale_3DNow;

  1135. 	else if(gCpuCaps.hasMMX)

  1136. 		swScale= swScale_MMX;

  1137. 	else

  1138. 		swScale= swScale_C;

  1139. 

  1140. #else

  1141. 	swScale= swScale_C;

  1142. 	cpuCaps.hasMMX2 = cpuCaps.hasMMX = cpuCaps.has3DNow = 0;

  1143. #endif

  1144. #else //RUNTIME_CPUDETECT

  1145. #ifdef HAVE_MMX2

  1146. 	swScale= swScale_MMX2;

  1147. 	cpuCaps.has3DNow = 0;

  1148. #elif defined (HAVE_3DNOW)

  1149. 	swScale= swScale_3DNow;

  1150. 	cpuCaps.hasMMX2 = 0;

  1151. #elif defined (HAVE_MMX)

  1152. 	swScale= swScale_MMX;

  1153. 	cpuCaps.hasMMX2 = cpuCaps.has3DNow = 0;

  1154. #else

  1155. 	swScale= swScale_C;

  1156. 	cpuCaps.hasMMX2 = cpuCaps.hasMMX = cpuCaps.has3DNow = 0;

  1157. #endif

  1158. #endif //!RUNTIME_CPUDETECT

  1159. }

  1160. 

  1161. /* Warper functions for yuv2bgr */

  1162. static void planarYuvToBgr(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1163.              int srcSliceH, uint8_t* dstParam[], int dstStride[]){

  1164. 	uint8_t *dst=dstParam[0] + dstStride[0]*srcSliceY;

  1165. 

  1166. 	if(c->srcFormat==IMGFMT_YV12)

  1167. 		yuv2rgb( dst,src[0],src[1],src[2],c->srcW,srcSliceH,dstStride[0],srcStride[0],srcStride[1] );

  1168. 	else /* I420 & IYUV */

  1169. 		yuv2rgb( dst,src[0],src[2],src[1],c->srcW,srcSliceH,dstStride[0],srcStride[0],srcStride[1] );

  1170. }

  1171. 

  1172. static void bgr24to32Wrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1173.              int srcSliceH, uint8_t* dst[], int dstStride[]){

  1174. 	

  1175. 	if(dstStride[0]*3==srcStride[0]*4)

  1176. 		rgb24to32(src[0], dst[0] + dstStride[0]*srcSliceY, srcSliceH*srcStride[0]);

  1177. 	else

  1178. 	{

  1179. 		int i;

  1180. 		uint8_t *srcPtr= src[0];

  1181. 		uint8_t *dstPtr= dst[0] + dstStride[0]*srcSliceY;

  1182. 

  1183. 		for(i=0; i<srcSliceH; i++)

  1184. 		{

  1185. 			rgb24to32(srcPtr, dstPtr, c->srcW*3);

  1186. 			srcPtr+= srcStride[0];

  1187. 			dstPtr+= dstStride[0];

  1188. 		}

  1189. 	}     

  1190. }

  1191. 

  1192. static void bgr32to24Wrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1193.              int srcSliceH, uint8_t* dst[], int dstStride[]){

  1194. 	

  1195. 	if(dstStride[0]*4==srcStride[0]*3)

  1196. 		rgb32to24(src[0], dst[0] + dstStride[0]*srcSliceY, srcSliceH*srcStride[0]);

  1197. 	else

  1198. 	{

  1199. 		int i;

  1200. 		uint8_t *srcPtr= src[0];

  1201. 		uint8_t *dstPtr= dst[0] + dstStride[0]*srcSliceY;

  1202. 

  1203. 		for(i=0; i<srcSliceH; i++)

  1204. 		{

  1205. 			rgb32to24(srcPtr, dstPtr, c->srcW<<2);

  1206. 			srcPtr+= srcStride[0];

  1207. 			dstPtr+= dstStride[0];

  1208. 		}

  1209. 	}     

  1210. }

  1211. 

  1212. static void bgr15to16Wrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1213.              int srcSliceH, uint8_t* dst[], int dstStride[]){

  1214. 	

  1215. 	if(dstStride[0]==srcStride[0])

  1216. 		rgb15to16(src[0], dst[0] + dstStride[0]*srcSliceY, srcSliceH*srcStride[0]);

  1217. 	else

  1218. 	{

  1219. 		int i;

  1220. 		uint8_t *srcPtr= src[0];

  1221. 		uint8_t *dstPtr= dst[0] + dstStride[0]*srcSliceY;

  1222. 

  1223. 		for(i=0; i<srcSliceH; i++)

  1224. 		{

  1225. 			rgb15to16(srcPtr, dstPtr, c->srcW<<1);

  1226. 			srcPtr+= srcStride[0];

  1227. 			dstPtr+= dstStride[0];

  1228. 		}

  1229. 	}     

  1230. }

  1231. 

  1232. static void bgr24toyv12Wrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1233.              int srcSliceH, uint8_t* dst[], int dstStride[]){

  1234. 

  1235. 	rgb24toyv12(

  1236. 		src[0], 

  1237. 		dst[0]+ srcSliceY    *dstStride[0], 

  1238. 		dst[1]+(srcSliceY>>1)*dstStride[1], 

  1239. 		dst[2]+(srcSliceY>>1)*dstStride[2],

  1240. 		c->srcW, srcSliceH, 

  1241. 		dstStride[0], dstStride[1], srcStride[0]);

  1242. }

  1243. 

  1244. 

  1245. /* unscaled copy like stuff (assumes nearly identical formats) */

  1246. static void simpleCopy(SwsContext *c, uint8_t* srcParam[], int srcStrideParam[], int srcSliceY,

  1247.              int srcSliceH, uint8_t* dstParam[], int dstStride[]){

  1248. 

  1249. 	int srcStride[3];

  1250. 	uint8_t *src[3];

  1251. 	uint8_t *dst[3];

  1252. 

  1253. 	if(c->srcFormat == IMGFMT_I420){

  1254. 		src[0]= srcParam[0];

  1255. 		src[1]= srcParam[2];

  1256. 		src[2]= srcParam[1];

  1257. 		srcStride[0]= srcStrideParam[0];

  1258. 		srcStride[1]= srcStrideParam[2];

  1259. 		srcStride[2]= srcStrideParam[1];

  1260. 	}

  1261. 	else if(c->srcFormat==IMGFMT_YV12){

  1262. 		src[0]= srcParam[0];

  1263. 		src[1]= srcParam[1];

  1264. 		src[2]= srcParam[2];

  1265. 		srcStride[0]= srcStrideParam[0];

  1266. 		srcStride[1]= srcStrideParam[1];

  1267. 		srcStride[2]= srcStrideParam[2];

  1268. 	}

  1269. 	else if(isPacked(c->srcFormat) || isGray(c->srcFormat)){

  1270. 		src[0]= srcParam[0];

  1271. 		src[1]=

  1272. 		src[2]= NULL;

  1273. 		srcStride[0]= srcStrideParam[0];

  1274. 		srcStride[1]=

  1275. 		srcStride[2]= 0;

  1276. 	}

  1277. 

  1278. 	if(c->dstFormat == IMGFMT_I420){

  1279. 		dst[0]= dstParam[0];

  1280. 		dst[1]= dstParam[2];

  1281. 		dst[2]= dstParam[1];

  1282. 		

  1283. 	}else{

  1284. 		dst[0]= dstParam[0];

  1285. 		dst[1]= dstParam[1];

  1286. 		dst[2]= dstParam[2];

  1287. 	}

  1288. 

  1289. 	if(isPacked(c->srcFormat))

  1290. 	{

  1291. 		if(dstStride[0]==srcStride[0])

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

  1293. 		else

  1294. 		{

  1295. 			int i;

  1296. 			uint8_t *srcPtr= src[0];

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

  1298. 			int length=0;

  1299. 

  1300. 			/* universal length finder */

  1301. 			while(length+c->srcW <= ABS(dstStride[0]) 

  1302. 			   && length+c->srcW <= ABS(srcStride[0])) length+= c->srcW;

  1303. 			ASSERT(length!=0);

  1304. 

  1305. 			for(i=0; i<srcSliceH; i++)

  1306. 			{

  1307. 				memcpy(dstPtr, srcPtr, length);

  1308. 				srcPtr+= srcStride[0];

  1309. 				dstPtr+= dstStride[0];

  1310. 			}

  1311. 		}

  1312. 	}

  1313. 	else 

  1314. 	{ /* Planar YUV */

  1315. 		int plane;

  1316. 		for(plane=0; plane<3; plane++)

  1317. 		{

  1318. 			int length= plane==0 ? c->srcW  : ((c->srcW+1)>>1);

  1319. 			int y=      plane==0 ? srcSliceY: ((srcSliceY+1)>>1);

  1320. 			int height= plane==0 ? srcSliceH: ((srcSliceH+1)>>1);

  1321. 

  1322. 			if(dstStride[plane]==srcStride[plane])

  1323. 				memcpy(dst[plane] + dstStride[plane]*y, src[plane], height*dstStride[plane]);

  1324. 			else

  1325. 			{

  1326. 				int i;

  1327. 				uint8_t *srcPtr= src[plane];

  1328. 				uint8_t *dstPtr= dst[plane] + dstStride[plane]*y;

  1329. 				for(i=0; i<height; i++)

  1330. 				{

  1331. 					memcpy(dstPtr, srcPtr, length);

  1332. 					srcPtr+= srcStride[plane];

  1333. 					dstPtr+= dstStride[plane];

  1334. 				}

  1335. 			}

  1336. 		}

  1337. 	}

  1338. }

  1339. 

  1340. SwsContext *getSwsContext(int srcW, int srcH, int srcFormat, int dstW, int dstH, int dstFormat, int flags,

  1341.                          SwsFilter *srcFilter, SwsFilter *dstFilter){

  1342. 

  1343. 	SwsContext *c;

  1344. 	int i;

  1345. 	int usesFilter;

  1346. 	SwsFilter dummyFilter= {NULL, NULL, NULL, NULL};

  1347. 

  1348. #ifdef ARCH_X86

  1349. 	if(gCpuCaps.hasMMX)

  1350. 		asm volatile("emms\n\t"::: "memory");

  1351. #endif

  1352. 

  1353. 	if(swScale==NULL) globalInit();

  1354. 

  1355. 	/* avoid dupplicate Formats, so we dont need to check to much */

  1356. 	if(srcFormat==IMGFMT_IYUV) srcFormat=IMGFMT_I420;

  1357. 	if(srcFormat==IMGFMT_Y8)   srcFormat=IMGFMT_Y800;

  1358. 	if(dstFormat==IMGFMT_Y8)   dstFormat=IMGFMT_Y800;

  1359. 

  1360. 	if(!isSupportedIn(srcFormat)) 

  1361. 	{

  1362. 		fprintf(stderr, "swScaler: %s is not supported as input format\n", vo_format_name(srcFormat));

  1363. 		return NULL;

  1364. 	}

  1365. 	if(!isSupportedOut(dstFormat))

  1366. 	{

  1367. 		fprintf(stderr, "swScaler: %s is not supported as output format\n", vo_format_name(dstFormat));

  1368. 		return NULL;

  1369. 	}

  1370. 

  1371. 	/* sanity check */

  1372. 	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

  1373. 	{

  1374. 		fprintf(stderr, "swScaler: %dx%d -> %dx%d is invalid scaling dimension\n", 

  1375. 			srcW, srcH, dstW, dstH);

  1376. 		return NULL;

  1377. 	}

  1378. 

  1379. 	if(!dstFilter) dstFilter= &dummyFilter;

  1380. 	if(!srcFilter) srcFilter= &dummyFilter;

  1381. 

  1382. 	c= memalign(64, sizeof(SwsContext));

  1383. 	memset(c, 0, sizeof(SwsContext));

  1384. 

  1385. 	c->srcW= srcW;

  1386. 	c->srcH= srcH;

  1387. 	c->dstW= dstW;

  1388. 	c->dstH= dstH;

  1389. 	c->lumXInc= ((srcW<<16) + (dstW>>1))/dstW;

  1390. 	c->lumYInc= ((srcH<<16) + (dstH>>1))/dstH;

  1391. 	c->flags= flags;

  1392. 	c->dstFormat= dstFormat;

  1393. 	c->srcFormat= srcFormat;

  1394. 

  1395. 	usesFilter=0;

  1396. 	if(dstFilter->lumV!=NULL && dstFilter->lumV->length>1) usesFilter=1;

  1397. 	if(dstFilter->lumH!=NULL && dstFilter->lumH->length>1) usesFilter=1;

  1398. 	if(dstFilter->chrV!=NULL && dstFilter->chrV->length>1) usesFilter=1;

  1399. 	if(dstFilter->chrH!=NULL && dstFilter->chrH->length>1) usesFilter=1;

  1400. 	if(srcFilter->lumV!=NULL && srcFilter->lumV->length>1) usesFilter=1;

  1401. 	if(srcFilter->lumH!=NULL && srcFilter->lumH->length>1) usesFilter=1;

  1402. 	if(srcFilter->chrV!=NULL && srcFilter->chrV->length>1) usesFilter=1;

  1403. 	if(srcFilter->chrH!=NULL && srcFilter->chrH->length>1) usesFilter=1;

  1404. 	

  1405. 	/* unscaled special Cases */

  1406. 	if(srcW==dstW && srcH==dstH && !usesFilter)

  1407. 	{

  1408. 		/* yuv2bgr */

  1409. 		if(isPlanarYUV(srcFormat) && isBGR(dstFormat))

  1410. 		{

  1411. 			// FIXME multiple yuv2rgb converters wont work that way cuz that thing is full of globals&statics

  1412. #ifdef WORDS_BIGENDIAN

  1413. 			yuv2rgb_init( dstFormat&0xFF /* =bpp */, MODE_BGR);

  1414. #else

  1415. 			yuv2rgb_init( dstFormat&0xFF /* =bpp */, MODE_RGB);

  1416. #endif

  1417. 			c->swScale= planarYuvToBgr;

  1418. 

  1419. 			if(flags&SWS_PRINT_INFO)

  1420. 				printf("SwScaler: using unscaled %s -> %s special converter\n", 

  1421. 					vo_format_name(srcFormat), vo_format_name(dstFormat));

  1422. 			return c;

  1423. 		}

  1424. 

  1425. 		/* simple copy */

  1426. 		if(srcFormat == dstFormat || (isPlanarYUV(srcFormat) && isPlanarYUV(dstFormat)))

  1427. 		{

  1428. 			c->swScale= simpleCopy;

  1429. 

  1430. 			if(flags&SWS_PRINT_INFO)

  1431. 				printf("SwScaler: using unscaled %s -> %s special converter\n", 

  1432. 					vo_format_name(srcFormat), vo_format_name(dstFormat));

  1433. 			return c;

  1434. 		}

  1435. 		

  1436. 		/* bgr32to24 & rgb32to24*/

  1437. 		if((srcFormat==IMGFMT_BGR32 && dstFormat==IMGFMT_BGR24)

  1438. 		 ||(srcFormat==IMGFMT_RGB32 && dstFormat==IMGFMT_RGB24))

  1439. 		{

  1440. 			c->swScale= bgr32to24Wrapper;

  1441. 

  1442. 			if(flags&SWS_PRINT_INFO)

  1443. 				printf("SwScaler: using unscaled %s -> %s special converter\n", 

  1444. 					vo_format_name(srcFormat), vo_format_name(dstFormat));

  1445. 			return c;

  1446. 		}

  1447. 		

  1448. 		/* bgr24to32 & rgb24to32*/

  1449. 		if((srcFormat==IMGFMT_BGR24 && dstFormat==IMGFMT_BGR32)

  1450. 		 ||(srcFormat==IMGFMT_RGB24 && dstFormat==IMGFMT_RGB32))

  1451. 		{

  1452. 			c->swScale= bgr24to32Wrapper;

  1453. 

  1454. 			if(flags&SWS_PRINT_INFO)

  1455. 				printf("SwScaler: using unscaled %s -> %s special converter\n", 

  1456. 					vo_format_name(srcFormat), vo_format_name(dstFormat));

  1457. 			return c;

  1458. 		}

  1459. 

  1460. 		/* bgr15to16 */

  1461. 		if(srcFormat==IMGFMT_BGR15 && dstFormat==IMGFMT_BGR16)

  1462. 		{

  1463. 			c->swScale= bgr15to16Wrapper;

  1464. 

  1465. 			if(flags&SWS_PRINT_INFO)

  1466. 				printf("SwScaler: using unscaled %s -> %s special converter\n", 

  1467. 					vo_format_name(srcFormat), vo_format_name(dstFormat));

  1468. 			return c;

  1469. 		}

  1470. 

  1471. 		/* bgr24toYV12 */

  1472. 		if(srcFormat==IMGFMT_BGR24 && dstFormat==IMGFMT_YV12)

  1473. 		{

  1474. 			c->swScale= bgr24toyv12Wrapper;

  1475. 

  1476. 			if(flags&SWS_PRINT_INFO)

  1477. 				printf("SwScaler: using unscaled %s -> %s special converter\n", 

  1478. 					vo_format_name(srcFormat), vo_format_name(dstFormat));

  1479. 			return c;

  1480. 		}

  1481. 	}

  1482. 

  1483. 	if(cpuCaps.hasMMX2)

  1484. 	{

  1485. 		c->canMMX2BeUsed= (dstW >=srcW && (dstW&31)==0 && (srcW&15)==0) ? 1 : 0;

  1486. 		if(!c->canMMX2BeUsed && dstW >=srcW && (srcW&15)==0 && (flags&SWS_FAST_BILINEAR))

  1487. 		{

  1488. 			if(flags&SWS_PRINT_INFO)

  1489. 				fprintf(stderr, "SwScaler: output Width is not a multiple of 32 -> no MMX2 scaler\n");

  1490. 		}

  1491. 	}

  1492. 	else

  1493. 		c->canMMX2BeUsed=0;

  1494. 

  1495. 

  1496. 	/* dont use full vertical UV input/internaly if the source doesnt even have it */

  1497. 	if(isHalfChrV(srcFormat)) c->flags= flags= flags&(~SWS_FULL_CHR_V);

  1498. 	/* dont use full horizontal UV input if the source doesnt even have it */

  1499. 	if(isHalfChrH(srcFormat)) c->flags= flags= flags&(~SWS_FULL_CHR_H_INP);

  1500. 	/* dont use full horizontal UV internally if the destination doesnt even have it */

  1501. 	if(isHalfChrH(dstFormat)) c->flags= flags= flags&(~SWS_FULL_CHR_H_INT);

  1502. 

  1503. 	if(flags&SWS_FULL_CHR_H_INP)	c->chrSrcW= srcW;

  1504. 	else				c->chrSrcW= (srcW+1)>>1;

  1505. 

  1506. 	if(flags&SWS_FULL_CHR_H_INT)	c->chrDstW= dstW;

  1507. 	else				c->chrDstW= (dstW+1)>>1;

  1508. 

  1509. 	if(flags&SWS_FULL_CHR_V)	c->chrSrcH= srcH;

  1510. 	else				c->chrSrcH= (srcH+1)>>1;

  1511. 

  1512. 	if(isHalfChrV(dstFormat))	c->chrDstH= (dstH+1)>>1;

  1513. 	else				c->chrDstH= dstH;

  1514. 

  1515. 	c->chrXInc= ((c->chrSrcW<<16) + (c->chrDstW>>1))/c->chrDstW;

  1516. 	c->chrYInc= ((c->chrSrcH<<16) + (c->chrDstH>>1))/c->chrDstH;

  1517. 

  1518. 

  1519. 	// match pixel 0 of the src to pixel 0 of dst and match pixel n-2 of src to pixel n-2 of dst

  1520. 	// but only for the FAST_BILINEAR mode otherwise do correct scaling

  1521. 	// n-2 is the last chrominance sample available

  1522. 	// this is not perfect, but noone shuld notice the difference, the more correct variant

  1523. 	// would be like the vertical one, but that would require some special code for the

  1524. 	// first and last pixel

  1525. 	if(flags&SWS_FAST_BILINEAR)

  1526. 	{

  1527. 		if(c->canMMX2BeUsed)

  1528. 		{

  1529. 			c->lumXInc+= 20;

  1530. 			c->chrXInc+= 20;

  1531. 		}

  1532. 		//we dont use the x86asm scaler if mmx is available

  1533. 		else if(cpuCaps.hasMMX)

  1534. 		{

  1535. 			c->lumXInc = ((srcW-2)<<16)/(dstW-2) - 20;

  1536. 			c->chrXInc = ((c->chrSrcW-2)<<16)/(c->chrDstW-2) - 20;

  1537. 		}

  1538. 	}

  1539. 

  1540. 	/* precalculate horizontal scaler filter coefficients */

  1541. 	{

  1542. 		const int filterAlign= cpuCaps.hasMMX ? 4 : 1;

  1543. 

  1544. 		initFilter(&c->hLumFilter, &c->hLumFilterPos, &c->hLumFilterSize, c->lumXInc,

  1545. 				 srcW      ,       dstW, filterAlign, 1<<14, flags,

  1546. 				 srcFilter->lumH, dstFilter->lumH);

  1547. 		initFilter(&c->hChrFilter, &c->hChrFilterPos, &c->hChrFilterSize, c->chrXInc,

  1548. 				(srcW+1)>>1, c->chrDstW, filterAlign, 1<<14, flags,

  1549. 				 srcFilter->chrH, dstFilter->chrH);

  1550. 

  1551. #ifdef ARCH_X86

  1552. // cant downscale !!!

  1553. 		if(c->canMMX2BeUsed && (flags & SWS_FAST_BILINEAR))

  1554. 		{

  1555. 			initMMX2HScaler(      dstW, c->lumXInc, c->funnyYCode);

  1556. 			initMMX2HScaler(c->chrDstW, c->chrXInc, c->funnyUVCode);

  1557. 		}

  1558. #endif

  1559. 	} // Init Horizontal stuff

  1560. 

  1561. 

  1562. 

  1563. 	/* precalculate vertical scaler filter coefficients */

  1564. 	initFilter(&c->vLumFilter, &c->vLumFilterPos, &c->vLumFilterSize, c->lumYInc,

  1565. 			srcH      ,        dstH, 1, (1<<12)-4, flags,

  1566. 			srcFilter->lumV, dstFilter->lumV);

  1567. 	initFilter(&c->vChrFilter, &c->vChrFilterPos, &c->vChrFilterSize, c->chrYInc,

  1568. 			(srcH+1)>>1, c->chrDstH, 1, (1<<12)-4, flags,

  1569. 			 srcFilter->chrV, dstFilter->chrV);

  1570. 

  1571. 	// Calculate Buffer Sizes so that they wont run out while handling these damn slices

  1572. 	c->vLumBufSize= c->vLumFilterSize;

  1573. 	c->vChrBufSize= c->vChrFilterSize;

  1574. 	for(i=0; i<dstH; i++)

  1575. 	{

  1576. 		int chrI= i*c->chrDstH / dstH;

  1577. 		int nextSlice= MAX(c->vLumFilterPos[i   ] + c->vLumFilterSize - 1,

  1578. 				 ((c->vChrFilterPos[chrI] + c->vChrFilterSize - 1)<<1));

  1579. 		nextSlice&= ~1; // Slices start at even boundaries

  1580. 		if(c->vLumFilterPos[i   ] + c->vLumBufSize < nextSlice)

  1581. 			c->vLumBufSize= nextSlice - c->vLumFilterPos[i   ];

  1582. 		if(c->vChrFilterPos[chrI] + c->vChrBufSize < (nextSlice>>1))

  1583. 			c->vChrBufSize= (nextSlice>>1) - c->vChrFilterPos[chrI];

  1584. 	}

  1585. 

  1586. 	// allocate pixbufs (we use dynamic allocation because otherwise we would need to

  1587. 	c->lumPixBuf= (int16_t**)memalign(4, c->vLumBufSize*2*sizeof(int16_t*));

  1588. 	c->chrPixBuf= (int16_t**)memalign(4, c->vChrBufSize*2*sizeof(int16_t*));

  1589. 	//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)

  1590. 	for(i=0; i<c->vLumBufSize; i++)

  1591. 		c->lumPixBuf[i]= c->lumPixBuf[i+c->vLumBufSize]= (uint16_t*)memalign(8, 4000);

  1592. 	for(i=0; i<c->vChrBufSize; i++)

  1593. 		c->chrPixBuf[i]= c->chrPixBuf[i+c->vChrBufSize]= (uint16_t*)memalign(8, 8000);

  1594. 

  1595. 	//try to avoid drawing green stuff between the right end and the stride end

  1596. 	for(i=0; i<c->vLumBufSize; i++) memset(c->lumPixBuf[i], 0, 4000);

  1597. 	for(i=0; i<c->vChrBufSize; i++) memset(c->chrPixBuf[i], 64, 8000);

  1598. 

  1599. 	ASSERT(c->chrDstH <= dstH)

  1600. 

  1601. 	// pack filter data for mmx code

  1602. 	if(cpuCaps.hasMMX)

  1603. 	{

  1604. 		c->lumMmxFilter= (int16_t*)memalign(8, c->vLumFilterSize*      dstH*4*sizeof(int16_t));

  1605. 		c->chrMmxFilter= (int16_t*)memalign(8, c->vChrFilterSize*c->chrDstH*4*sizeof(int16_t));

  1606. 		for(i=0; i<c->vLumFilterSize*dstH; i++)

  1607. 			c->lumMmxFilter[4*i]=c->lumMmxFilter[4*i+1]=c->lumMmxFilter[4*i+2]=c->lumMmxFilter[4*i+3]=

  1608. 				c->vLumFilter[i];

  1609. 		for(i=0; i<c->vChrFilterSize*c->chrDstH; i++)

  1610. 			c->chrMmxFilter[4*i]=c->chrMmxFilter[4*i+1]=c->chrMmxFilter[4*i+2]=c->chrMmxFilter[4*i+3]=

  1611. 				c->vChrFilter[i];

  1612. 	}

  1613. 

  1614. 	if(flags&SWS_PRINT_INFO)

  1615. 	{

  1616. #ifdef DITHER1XBPP

  1617. 		char *dither= " dithered";

  1618. #else

  1619. 		char *dither= "";

  1620. #endif

  1621. 		if(flags&SWS_FAST_BILINEAR)

  1622. 			fprintf(stderr, "\nSwScaler: FAST_BILINEAR scaler, ");

  1623. 		else if(flags&SWS_BILINEAR)

  1624. 			fprintf(stderr, "\nSwScaler: BILINEAR scaler, ");

  1625. 		else if(flags&SWS_BICUBIC)

  1626. 			fprintf(stderr, "\nSwScaler: BICUBIC scaler, ");

  1627. 		else if(flags&SWS_X)

  1628. 			fprintf(stderr, "\nSwScaler: Experimental scaler, ");

  1629. 		else if(flags&SWS_POINT)

  1630. 			fprintf(stderr, "\nSwScaler: Nearest Neighbor / POINT scaler, ");

  1631. 		else if(flags&SWS_AREA)

  1632. 			fprintf(stderr, "\nSwScaler: Area Averageing scaler, ");

  1633. 		else

  1634. 			fprintf(stderr, "\nSwScaler: ehh flags invalid?! ");

  1635. 

  1636. 		if(dstFormat==IMGFMT_BGR15 || dstFormat==IMGFMT_BGR16)

  1637. 			fprintf(stderr, "from %s to%s %s ", 

  1638. 				vo_format_name(srcFormat), dither, vo_format_name(dstFormat));

  1639. 		else

  1640. 			fprintf(stderr, "from %s to %s ", 

  1641. 				vo_format_name(srcFormat), vo_format_name(dstFormat));

  1642. 

  1643. 		if(cpuCaps.hasMMX2)

  1644. 			fprintf(stderr, "using MMX2\n");

  1645. 		else if(cpuCaps.has3DNow)

  1646. 			fprintf(stderr, "using 3DNOW\n");

  1647. 		else if(cpuCaps.hasMMX)

  1648. 			fprintf(stderr, "using MMX\n");

  1649. 		else

  1650. 			fprintf(stderr, "using C\n");

  1651. 	}

  1652. 

  1653. 	if((flags & SWS_PRINT_INFO) && verbose)

  1654. 	{

  1655. 		if(cpuCaps.hasMMX)

  1656. 		{

  1657. 			if(c->canMMX2BeUsed && (flags&SWS_FAST_BILINEAR))

  1658. 				printf("SwScaler: using FAST_BILINEAR MMX2 scaler for horizontal scaling\n");

  1659. 			else

  1660. 			{

  1661. 				if(c->hLumFilterSize==4)

  1662. 					printf("SwScaler: using 4-tap MMX scaler for horizontal luminance scaling\n");

  1663. 				else if(c->hLumFilterSize==8)

  1664. 					printf("SwScaler: using 8-tap MMX scaler for horizontal luminance scaling\n");

  1665. 				else

  1666. 					printf("SwScaler: using n-tap MMX scaler for horizontal luminance scaling\n");

  1667. 

  1668. 				if(c->hChrFilterSize==4)

  1669. 					printf("SwScaler: using 4-tap MMX scaler for horizontal chrominance scaling\n");

  1670. 				else if(c->hChrFilterSize==8)

  1671. 					printf("SwScaler: using 8-tap MMX scaler for horizontal chrominance scaling\n");

  1672. 				else

  1673. 					printf("SwScaler: using n-tap MMX scaler for horizontal chrominance scaling\n");

  1674. 			}

  1675. 		}

  1676. 		else

  1677. 		{

  1678. #ifdef ARCH_X86

  1679. 			printf("SwScaler: using X86-Asm scaler for horizontal scaling\n");

  1680. #else

  1681. 			if(flags & SWS_FAST_BILINEAR)

  1682. 				printf("SwScaler: using FAST_BILINEAR C scaler for horizontal scaling\n");

  1683. 			else

  1684. 				printf("SwScaler: using C scaler for horizontal scaling\n");

  1685. #endif

  1686. 		}

  1687. 		if(isPlanarYUV(dstFormat))

  1688. 		{

  1689. 			if(c->vLumFilterSize==1)

  1690. 				printf("SwScaler: using 1-tap %s \"scaler\" for vertical scaling (YV12 like)\n", cpuCaps.hasMMX ? "MMX" : "C");

  1691. 			else

  1692. 				printf("SwScaler: using n-tap %s scaler for vertical scaling (YV12 like)\n", cpuCaps.hasMMX ? "MMX" : "C");

  1693. 		}

  1694. 		else

  1695. 		{

  1696. 			if(c->vLumFilterSize==1 && c->vChrFilterSize==2)

  1697. 				printf("SwScaler: using 1-tap %s \"scaler\" for vertical luminance scaling (BGR)\n"

  1698. 				       "SwScaler:       2-tap scaler for vertical chrominance scaling (BGR)\n",cpuCaps.hasMMX ? "MMX" : "C");

  1699. 			else if(c->vLumFilterSize==2 && c->vChrFilterSize==2)

  1700. 				printf("SwScaler: using 2-tap linear %s scaler for vertical scaling (BGR)\n", cpuCaps.hasMMX ? "MMX" : "C");

  1701. 			else

  1702. 				printf("SwScaler: using n-tap %s scaler for vertical scaling (BGR)\n", cpuCaps.hasMMX ? "MMX" : "C");

  1703. 		}

  1704. 

  1705. 		if(dstFormat==IMGFMT_BGR24)

  1706. 			printf("SwScaler: using %s YV12->BGR24 Converter\n",

  1707. 				cpuCaps.hasMMX2 ? "MMX2" : (cpuCaps.hasMMX ? "MMX" : "C"));

  1708. 		else if(dstFormat==IMGFMT_BGR32)

  1709. 			printf("SwScaler: using %s YV12->BGR32 Converter\n", cpuCaps.hasMMX ? "MMX" : "C");

  1710. 		else if(dstFormat==IMGFMT_BGR16)

  1711. 			printf("SwScaler: using %s YV12->BGR16 Converter\n", cpuCaps.hasMMX ? "MMX" : "C");

  1712. 		else if(dstFormat==IMGFMT_BGR15)

  1713. 			printf("SwScaler: using %s YV12->BGR15 Converter\n", cpuCaps.hasMMX ? "MMX" : "C");

  1714. 

  1715. 		printf("SwScaler: %dx%d -> %dx%d\n", srcW, srcH, dstW, dstH);

  1716. 	}

  1717. 	if((flags & SWS_PRINT_INFO) && verbose>1)

  1718. 	{

  1719. 		printf("SwScaler:Lum srcW=%d srcH=%d dstW=%d dstH=%d xInc=%d yInc=%d\n",

  1720. 			c->srcW, c->srcH, c->dstW, c->dstH, c->lumXInc, c->lumYInc);

  1721. 		printf("SwScaler:Chr srcW=%d srcH=%d dstW=%d dstH=%d xInc=%d yInc=%d\n",

  1722. 			c->chrSrcW, c->chrSrcH, c->chrDstW, c->chrDstH, c->chrXInc, c->chrYInc);

  1723. 	}

  1724. 

  1725. 	c->swScale= swScale;

  1726. 	return c;

  1727. }

  1728. 

  1729. /**

  1730.  * returns a normalized gaussian curve used to filter stuff

  1731.  * quality=3 is high quality, lowwer is lowwer quality

  1732.  */

  1733. 

  1734. SwsVector *getGaussianVec(double variance, double quality){

  1735. 	const int length= (int)(variance*quality + 0.5) | 1;

  1736. 	int i;

  1737. 	double *coeff= memalign(sizeof(double), length*sizeof(double));

  1738. 	double middle= (length-1)*0.5;

  1739. 	SwsVector *vec= malloc(sizeof(SwsVector));

  1740. 

  1741. 	vec->coeff= coeff;

  1742. 	vec->length= length;

  1743. 

  1744. 	for(i=0; i<length; i++)

  1745. 	{

  1746. 		double dist= i-middle;

  1747. 		coeff[i]= exp( -dist*dist/(2*variance*variance) ) / sqrt(2*variance*PI);

  1748. 	}

  1749. 

  1750. 	normalizeVec(vec, 1.0);

  1751. 

  1752. 	return vec;

  1753. }

  1754. 

  1755. SwsVector *getConstVec(double c, int length){

  1756. 	int i;

  1757. 	double *coeff= memalign(sizeof(double), length*sizeof(double));

  1758. 	SwsVector *vec= malloc(sizeof(SwsVector));

  1759. 

  1760. 	vec->coeff= coeff;

  1761. 	vec->length= length;

  1762. 

  1763. 	for(i=0; i<length; i++)

  1764. 		coeff[i]= c;

  1765. 

  1766. 	return vec;

  1767. }

  1768. 

  1769. 

  1770. SwsVector *getIdentityVec(void){

  1771. 	double *coeff= memalign(sizeof(double), sizeof(double));

  1772. 	SwsVector *vec= malloc(sizeof(SwsVector));

  1773. 	coeff[0]= 1.0;

  1774. 

  1775. 	vec->coeff= coeff;

  1776. 	vec->length= 1;

  1777. 

  1778. 	return vec;

  1779. }

  1780. 

  1781. void normalizeVec(SwsVector *a, double height){

  1782. 	int i;

  1783. 	double sum=0;

  1784. 	double inv;

  1785. 

  1786. 	for(i=0; i<a->length; i++)

  1787. 		sum+= a->coeff[i];

  1788. 

  1789. 	inv= height/sum;

  1790. 

  1791. 	for(i=0; i<a->length; i++)

  1792. 		a->coeff[i]*= height;

  1793. }

  1794. 

  1795. void scaleVec(SwsVector *a, double scalar){

  1796. 	int i;

  1797. 

  1798. 	for(i=0; i<a->length; i++)

  1799. 		a->coeff[i]*= scalar;

  1800. }

  1801. 

  1802. static SwsVector *getConvVec(SwsVector *a, SwsVector *b){

  1803. 	int length= a->length + b->length - 1;

  1804. 	double *coeff= memalign(sizeof(double), length*sizeof(double));

  1805. 	int i, j;

  1806. 	SwsVector *vec= malloc(sizeof(SwsVector));

  1807. 

  1808. 	vec->coeff= coeff;

  1809. 	vec->length= length;

  1810. 

  1811. 	for(i=0; i<length; i++) coeff[i]= 0.0;

  1812. 

  1813. 	for(i=0; i<a->length; i++)

  1814. 	{

  1815. 		for(j=0; j<b->length; j++)

  1816. 		{

  1817. 			coeff[i+j]+= a->coeff[i]*b->coeff[j];

  1818. 		}

  1819. 	}

  1820. 

  1821. 	return vec;

  1822. }

  1823. 

  1824. static SwsVector *sumVec(SwsVector *a, SwsVector *b){

  1825. 	int length= MAX(a->length, b->length);

  1826. 	double *coeff= memalign(sizeof(double), length*sizeof(double));

  1827. 	int i;

  1828. 	SwsVector *vec= malloc(sizeof(SwsVector));

  1829. 

  1830. 	vec->coeff= coeff;

  1831. 	vec->length= length;

  1832. 

  1833. 	for(i=0; i<length; i++) coeff[i]= 0.0;

  1834. 

  1835. 	for(i=0; i<a->length; i++) coeff[i + (length-1)/2 - (a->length-1)/2]+= a->coeff[i];

  1836. 	for(i=0; i<b->length; i++) coeff[i + (length-1)/2 - (b->length-1)/2]+= b->coeff[i];

  1837. 

  1838. 	return vec;

  1839. }

  1840. 

  1841. static SwsVector *diffVec(SwsVector *a, SwsVector *b){

  1842. 	int length= MAX(a->length, b->length);

  1843. 	double *coeff= memalign(sizeof(double), length*sizeof(double));

  1844. 	int i;

  1845. 	SwsVector *vec= malloc(sizeof(SwsVector));

  1846. 

  1847. 	vec->coeff= coeff;

  1848. 	vec->length= length;

  1849. 

  1850. 	for(i=0; i<length; i++) coeff[i]= 0.0;

  1851. 

  1852. 	for(i=0; i<a->length; i++) coeff[i + (length-1)/2 - (a->length-1)/2]+= a->coeff[i];

  1853. 	for(i=0; i<b->length; i++) coeff[i + (length-1)/2 - (b->length-1)/2]-= b->coeff[i];

  1854. 

  1855. 	return vec;

  1856. }

  1857. 

  1858. /* shift left / or right if "shift" is negative */

  1859. static SwsVector *getShiftedVec(SwsVector *a, int shift){

  1860. 	int length= a->length + ABS(shift)*2;

  1861. 	double *coeff= memalign(sizeof(double), length*sizeof(double));

  1862. 	int i;

  1863. 	SwsVector *vec= malloc(sizeof(SwsVector));

  1864. 

  1865. 	vec->coeff= coeff;

  1866. 	vec->length= length;

  1867. 

  1868. 	for(i=0; i<length; i++) coeff[i]= 0.0;

  1869. 

  1870. 	for(i=0; i<a->length; i++)

  1871. 	{

  1872. 		coeff[i + (length-1)/2 - (a->length-1)/2 - shift]= a->coeff[i];

  1873. 	}

  1874. 

  1875. 	return vec;

  1876. }

  1877. 

  1878. void shiftVec(SwsVector *a, int shift){

  1879. 	SwsVector *shifted= getShiftedVec(a, shift);

  1880. 	free(a->coeff);

  1881. 	a->coeff= shifted->coeff;

  1882. 	a->length= shifted->length;

  1883. 	free(shifted);

  1884. }

  1885. 

  1886. void addVec(SwsVector *a, SwsVector *b){

  1887. 	SwsVector *sum= sumVec(a, b);

  1888. 	free(a->coeff);

  1889. 	a->coeff= sum->coeff;

  1890. 	a->length= sum->length;

  1891. 	free(sum);

  1892. }

  1893. 

  1894. void subVec(SwsVector *a, SwsVector *b){

  1895. 	SwsVector *diff= diffVec(a, b);

  1896. 	free(a->coeff);

  1897. 	a->coeff= diff->coeff;

  1898. 	a->length= diff->length;

  1899. 	free(diff);

  1900. }

  1901. 

  1902. void convVec(SwsVector *a, SwsVector *b){

  1903. 	SwsVector *conv= getConvVec(a, b);

  1904. 	free(a->coeff);

  1905. 	a->coeff= conv->coeff;

  1906. 	a->length= conv->length;

  1907. 	free(conv);

  1908. }

  1909. 

  1910. SwsVector *cloneVec(SwsVector *a){

  1911. 	double *coeff= memalign(sizeof(double), a->length*sizeof(double));

  1912. 	int i;

  1913. 	SwsVector *vec= malloc(sizeof(SwsVector));

  1914. 

  1915. 	vec->coeff= coeff;

  1916. 	vec->length= a->length;

  1917. 

  1918. 	for(i=0; i<a->length; i++) coeff[i]= a->coeff[i];

  1919. 

  1920. 	return vec;

  1921. }

  1922. 

  1923. void printVec(SwsVector *a){

  1924. 	int i;

  1925. 	double max=0;

  1926. 	double min=0;

  1927. 	double range;

  1928. 

  1929. 	for(i=0; i<a->length; i++)

  1930. 		if(a->coeff[i]>max) max= a->coeff[i];

  1931. 

  1932. 	for(i=0; i<a->length; i++)

  1933. 		if(a->coeff[i]<min) min= a->coeff[i];

  1934. 

  1935. 	range= max - min;

  1936. 

  1937. 	for(i=0; i<a->length; i++)

  1938. 	{

  1939. 		int x= (int)((a->coeff[i]-min)*60.0/range +0.5);

  1940. 		printf("%1.3f ", a->coeff[i]);

  1941. 		for(;x>0; x--) printf(" ");

  1942. 		printf("|\n");

  1943. 	}

  1944. }

  1945. 

  1946. void freeVec(SwsVector *a){

  1947. 	if(!a) return;

  1948. 	if(a->coeff) free(a->coeff);

  1949. 	a->coeff=NULL;

  1950. 	a->length=0;

  1951. 	free(a);

  1952. }

  1953. 

  1954. void freeSwsContext(SwsContext *c){

  1955. 	int i;

  1956. 

  1957. 	if(!c) return;

  1958. 

  1959. 	if(c->lumPixBuf)

  1960. 	{

  1961. 		for(i=0; i<c->vLumBufSize; i++)

  1962. 		{

  1963. 			if(c->lumPixBuf[i]) free(c->lumPixBuf[i]);

  1964. 			c->lumPixBuf[i]=NULL;

  1965. 		}

  1966. 		free(c->lumPixBuf);

  1967. 		c->lumPixBuf=NULL;

  1968. 	}

  1969. 

  1970. 	if(c->chrPixBuf)

  1971. 	{

  1972. 		for(i=0; i<c->vChrBufSize; i++)

  1973. 		{

  1974. 			if(c->chrPixBuf[i]) free(c->chrPixBuf[i]);

  1975. 			c->chrPixBuf[i]=NULL;

  1976. 		}

  1977. 		free(c->chrPixBuf);

  1978. 		c->chrPixBuf=NULL;

  1979. 	}

  1980. 

  1981. 	if(c->vLumFilter) free(c->vLumFilter);

  1982. 	c->vLumFilter = NULL;

  1983. 	if(c->vChrFilter) free(c->vChrFilter);

  1984. 	c->vChrFilter = NULL;

  1985. 	if(c->hLumFilter) free(c->hLumFilter);

  1986. 	c->hLumFilter = NULL;

  1987. 	if(c->hChrFilter) free(c->hChrFilter);

  1988. 	c->hChrFilter = NULL;

  1989. 

  1990. 	if(c->vLumFilterPos) free(c->vLumFilterPos);

  1991. 	c->vLumFilterPos = NULL;

  1992. 	if(c->vChrFilterPos) free(c->vChrFilterPos);

  1993. 	c->vChrFilterPos = NULL;

  1994. 	if(c->hLumFilterPos) free(c->hLumFilterPos);

  1995. 	c->hLumFilterPos = NULL;

  1996. 	if(c->hChrFilterPos) free(c->hChrFilterPos);

  1997. 	c->hChrFilterPos = NULL;

  1998. 

  1999. 	if(c->lumMmxFilter) free(c->lumMmxFilter);

  2000. 	c->lumMmxFilter = NULL;

  2001. 	if(c->chrMmxFilter) free(c->chrMmxFilter);

  2002. 	c->chrMmxFilter = NULL;

  2003. 

  2004. 	free(c);

  2005. }

  2006.