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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 (grayscale soon too)

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

  22. */

  23. 

  24. #include <inttypes.h>

  25. #include <string.h>

  26. #include <math.h>

  27. #include <stdio.h>

  28. #include "../config.h"

  29. #include "../mangle.h"

  30. #ifdef HAVE_MALLOC_H

  31. #include <malloc.h>

  32. #endif

  33. #include "swscale.h"

  34. #include "../cpudetect.h"

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

  36. #undef MOVNTQ

  37. #undef PAVGB

  38. 

  39. //#undef HAVE_MMX2

  40. //#define HAVE_3DNOW

  41. //#undef HAVE_MMX

  42. //#undef ARCH_X86

  43. #define DITHER1XBPP

  44. 

  45. #define RET 0xC3 //near return opcode

  46. 

  47. #ifdef MP_DEBUG

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

  49. #else

  50. #define ASSERT(x) ;

  51. #endif

  52. 

  53. #ifdef M_PI

  54. #define PI M_PI

  55. #else

  56. #define PI 3.14159265358979323846

  57. #endif

  58. 

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

  60. /*

  61. NOTES

  62. 

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

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

  65. 

  66. Supported output formats BGR15 BGR16 BGR24 BGR32 YV12

  67. BGR15 & BGR16 MMX verions support dithering

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

  69. 

  70. TODO

  71. more intelligent missalignment avoidance for the horizontal scaler

  72. dither in C

  73. change the distance of the u & v buffer

  74. write special vertical cubic upscale version

  75. Optimize C code (yv12 / minmax)

  76. */

  77. 

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

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

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

  81. 

  82. #ifdef ARCH_X86

  83. #define CAN_COMPILE_X86_ASM

  84. #endif

  85. 

  86. #ifdef CAN_COMPILE_X86_ASM

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  101. 

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

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

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

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

  106. 

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

  108. 	0x0103010301030103LL,

  109. 	0x0200020002000200LL,};

  110. 

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

  112. 	0x0602060206020602LL,

  113. 	0x0004000400040004LL,};

  114. 

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

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

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

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

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

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

  121. 

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

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

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

  125. 

  126. // FIXME remove

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

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

  129. #endif

  130. 

  131. // clipping helper table for C implementations:

  132. static unsigned char clip_table[768];

  133. 

  134. static unsigned short clip_table16b[768];

  135. static unsigned short clip_table16g[768];

  136. static unsigned short clip_table16r[768];

  137. static unsigned short clip_table15b[768];

  138. static unsigned short clip_table15g[768];

  139. static unsigned short clip_table15r[768];

  140. 

  141. // yuv->rgb conversion tables:

  142. static    int yuvtab_2568[256];

  143. static    int yuvtab_3343[256];

  144. static    int yuvtab_0c92[256];

  145. static    int yuvtab_1a1e[256];

  146. static    int yuvtab_40cf[256];

  147. // Needed for cubic scaler to catch overflows

  148. static    int clip_yuvtab_2568[768];

  149. static    int clip_yuvtab_3343[768];

  150. static    int clip_yuvtab_0c92[768];

  151. static    int clip_yuvtab_1a1e[768];

  152. static    int clip_yuvtab_40cf[768];

  153. 

  154. //global sws_flags from the command line

  155. int sws_flags=0;

  156. 

  157. //global srcFilter

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

  159. 

  160. float sws_lum_gblur= 0.0;

  161. float sws_chr_gblur= 0.0;

  162. int sws_chr_vshift= 0;

  163. int sws_chr_hshift= 0;

  164. float sws_chr_sharpen= 0.0;

  165. float sws_lum_sharpen= 0.0;

  166. 

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

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

  169. static CpuCaps cpuCaps;

  170. 

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

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

  173. 

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

  175. 

  176. #ifdef CAN_COMPILE_X86_ASM

  177. void in_asm_used_var_warning_killer()

  178. {

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

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

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

  182.  if(i) i=0;

  183. }

  184. #endif

  185. 

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

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

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

  189. {

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

  191. 	int i;

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

  193. 	{

  194. 		int val=0;

  195. 		int j;

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

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

  198. 

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

  200. 	}

  201. 

  202. 	if(uDest != NULL)

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

  204. 		{

  205. 			int u=0;

  206. 			int v=0;

  207. 			int j;

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

  209. 			{

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

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

  212. 			}

  213. 

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

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

  216. 		}

  217. }

  218. 

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

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

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

  222. {

  223. 	if(dstFormat==IMGFMT_BGR32)

  224. 	{

  225. 		int i;

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

  227. 			int j;

  228. 			int Y1=0;

  229. 			int Y2=0;

  230. 			int U=0;

  231. 			int V=0;

  232. 			int Cb, Cr, Cg;

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

  234. 			{

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

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

  237. 			}

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

  239. 			{

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

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

  242. 			}

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

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

  245. 			U >>= 19;

  246. 			V >>= 19;

  247. 

  248. 			Cb= clip_yuvtab_40cf[U+ 256];

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

  250. 			Cr= clip_yuvtab_3343[V+ 256];

  251. 

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

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

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

  255. 

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

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

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

  259. 		}

  260. 	}

  261. 	else if(dstFormat==IMGFMT_BGR24)

  262. 	{

  263. 		int i;

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

  265. 			int j;

  266. 			int Y1=0;

  267. 			int Y2=0;

  268. 			int U=0;

  269. 			int V=0;

  270. 			int Cb, Cr, Cg;

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

  272. 			{

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

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

  275. 			}

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

  277. 			{

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

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

  280. 			}

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

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

  283. 			U >>= 19;

  284. 			V >>= 19;

  285. 

  286. 			Cb= clip_yuvtab_40cf[U+ 256];

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

  288. 			Cr= clip_yuvtab_3343[V+ 256];

  289. 

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

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

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

  293. 

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

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

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

  297. 			dest+=6;

  298. 		}

  299. 	}

  300. 	else if(dstFormat==IMGFMT_BGR16)

  301. 	{

  302. 		int i;

  303. #ifdef DITHER1XBPP

  304. 		static int ditherb1=1<<14;

  305. 		static int ditherg1=1<<13;

  306. 		static int ditherr1=2<<14;

  307. 		static int ditherb2=3<<14;

  308. 		static int ditherg2=3<<13;

  309. 		static int ditherr2=0<<14;

  310. 

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

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

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

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

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

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

  317. #else

  318. 		const int ditherb1=0;

  319. 		const int ditherg1=0;

  320. 		const int ditherr1=0;

  321. 		const int ditherb2=0;

  322. 		const int ditherg2=0;

  323. 		const int ditherr2=0;

  324. #endif

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

  326. 			int j;

  327. 			int Y1=0;

  328. 			int Y2=0;

  329. 			int U=0;

  330. 			int V=0;

  331. 			int Cb, Cr, Cg;

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

  333. 			{

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

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

  336. 			}

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

  338. 			{

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

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

  341. 			}

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

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

  344. 			U >>= 19;

  345. 			V >>= 19;

  346. 

  347. 			Cb= clip_yuvtab_40cf[U+ 256];

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

  349. 			Cr= clip_yuvtab_3343[V+ 256];

  350. 

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

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

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

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

  355. 

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

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

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

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

  360. 		}

  361. 	}

  362. 	else if(dstFormat==IMGFMT_BGR15)

  363. 	{

  364. 		int i;

  365. #ifdef DITHER1XBPP

  366. 		static int ditherb1=1<<14;

  367. 		static int ditherg1=1<<14;

  368. 		static int ditherr1=2<<14;

  369. 		static int ditherb2=3<<14;

  370. 		static int ditherg2=3<<14;

  371. 		static int ditherr2=0<<14;

  372. 

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

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

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

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

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

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

  379. #else

  380. 		const int ditherb1=0;

  381. 		const int ditherg1=0;

  382. 		const int ditherr1=0;

  383. 		const int ditherb2=0;

  384. 		const int ditherg2=0;

  385. 		const int ditherr2=0;

  386. #endif

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

  388. 			int j;

  389. 			int Y1=0;

  390. 			int Y2=0;

  391. 			int U=0;

  392. 			int V=0;

  393. 			int Cb, Cr, Cg;

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

  395. 			{

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

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

  398. 			}

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

  400. 			{

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

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

  403. 			}

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

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

  406. 			U >>= 19;

  407. 			V >>= 19;

  408. 

  409. 			Cb= clip_yuvtab_40cf[U+ 256];

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

  411. 			Cr= clip_yuvtab_3343[V+ 256];

  412. 

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

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

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

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

  417. 

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

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

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

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

  422. 		}

  423. 	}

  424. }

  425. 

  426. 

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

  428. //Plain C versions

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

  430. #define COMPILE_C

  431. #endif

  432. 

  433. #ifdef CAN_COMPILE_X86_ASM

  434. 

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

  436. #define COMPILE_MMX

  437. #endif

  438. 

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

  440. #define COMPILE_MMX2

  441. #endif

  442. 

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

  444. #define COMPILE_3DNOW

  445. #endif

  446. #endif //CAN_COMPILE_X86_ASM

  447. 

  448. #undef HAVE_MMX

  449. #undef HAVE_MMX2

  450. #undef HAVE_3DNOW

  451. 

  452. #ifdef COMPILE_C

  453. #undef HAVE_MMX

  454. #undef HAVE_MMX2

  455. #undef HAVE_3DNOW

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

  457. #include "swscale_template.c"

  458. #endif

  459. 

  460. #ifdef CAN_COMPILE_X86_ASM

  461. 

  462. //X86 versions

  463. /*

  464. #undef RENAME

  465. #undef HAVE_MMX

  466. #undef HAVE_MMX2

  467. #undef HAVE_3DNOW

  468. #define ARCH_X86

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

  470. #include "swscale_template.c"

  471. */

  472. //MMX versions

  473. #ifdef COMPILE_MMX

  474. #undef RENAME

  475. #define HAVE_MMX

  476. #undef HAVE_MMX2

  477. #undef HAVE_3DNOW

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

  479. #include "swscale_template.c"

  480. #endif

  481. 

  482. //MMX2 versions

  483. #ifdef COMPILE_MMX2

  484. #undef RENAME

  485. #define HAVE_MMX

  486. #define HAVE_MMX2

  487. #undef HAVE_3DNOW

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

  489. #include "swscale_template.c"

  490. #endif

  491. 

  492. //3DNOW versions

  493. #ifdef COMPILE_3DNOW

  494. #undef RENAME

  495. #define HAVE_MMX

  496. #undef HAVE_MMX2

  497. #define HAVE_3DNOW

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

  499. #include "swscale_template.c"

  500. #endif

  501. 

  502. #endif //CAN_COMPILE_X86_ASM

  503. 

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

  505. 

  506. 

  507. // old global scaler, dont use for new code, unless it uses only the stuff from the command line

  508. // will use sws_flags from the command line

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

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

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

  512. 

  513. 	static SwsContext *context=NULL;

  514. 	int dstFormat;

  515. 	int flags=0;

  516. 	static int firstTime=1;

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

  518. 

  519. 	if(firstTime)

  520. 	{

  521. #ifdef ARCH_X86

  522. 		if(gCpuCaps.hasMMX)

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

  524. #endif

  525. 		flags= SWS_PRINT_INFO;

  526. 		firstTime=0;

  527. 

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

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

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

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

  532. 

  533. 		if(sws_lum_gblur!=0.0){

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

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

  536. 		}else{

  537. 			src_filter.lumH= getIdentityVec();

  538. 			src_filter.lumV= getIdentityVec();

  539. 		}

  540. 

  541. 		if(sws_chr_gblur!=0.0){

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

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

  544. 		}else{

  545. 			src_filter.chrH= getIdentityVec();

  546. 			src_filter.chrV= getIdentityVec();

  547. 		}

  548. 

  549. 		if(sws_chr_sharpen!=0.0){

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

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

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

  553. 			addVec(id, g);

  554. 			convVec(src_filter.chrH, id);

  555. 			convVec(src_filter.chrV, id);

  556. 			freeVec(g);

  557. 			freeVec(id);

  558. 		}

  559. 

  560. 		if(sws_lum_sharpen!=0.0){

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

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

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

  564. 			addVec(id, g);

  565. 			convVec(src_filter.lumH, id);

  566. 			convVec(src_filter.lumV, id);

  567. 			freeVec(g);

  568. 			freeVec(id);

  569. 		}

  570. 

  571. 		if(sws_chr_hshift)

  572. 			shiftVec(src_filter.chrH, sws_chr_hshift);

  573. 

  574. 		if(sws_chr_vshift)

  575. 			shiftVec(src_filter.chrV, sws_chr_vshift);

  576. 

  577. 		normalizeVec(src_filter.chrH, 1.0);

  578. 		normalizeVec(src_filter.chrV, 1.0);

  579. 		normalizeVec(src_filter.lumH, 1.0);

  580. 		normalizeVec(src_filter.lumV, 1.0);

  581. 

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

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

  584. 	}

  585. 

  586. 	switch(dstbpp)

  587. 	{

  588. 		case 8 : dstFormat= IMGFMT_Y8;		break;

  589. 		case 12: dstFormat= IMGFMT_YV12;	break;

  590. 		case 15: dstFormat= IMGFMT_BGR15;	break;

  591. 		case 16: dstFormat= IMGFMT_BGR16;	break;

  592. 		case 24: dstFormat= IMGFMT_BGR24;	break;

  593. 		case 32: dstFormat= IMGFMT_BGR32;	break;

  594. 		default: return;

  595. 	}

  596. 

  597. 	switch(sws_flags)

  598. 	{

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

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

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

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

  603. 		default:flags|= SWS_BILINEAR; break;

  604. 	}

  605. 

  606. 	if(!context) context=getSwsContext(srcW, srcH, IMGFMT_YV12, dstW, dstH, dstFormat, flags, &src_filter, NULL);

  607. 

  608. 

  609. 	swScale(context, src, srcStride, srcSliceY, srcSliceH, dst, dstStride3);

  610. }

  611. 

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

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

  614. 			      SwsVector *srcFilter, SwsVector *dstFilter)

  615. {

  616. 	int i;

  617. 	int filterSize;

  618. 	int filter2Size;

  619. 	int minFilterSize;

  620. 	double *filter=NULL;

  621. 	double *filter2=NULL;

  622. #ifdef ARCH_X86

  623. 	if(gCpuCaps.hasMMX)

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

  625. #endif

  626. 

  627. 	*filterPos = (int16_t*)memalign(8, dstW*sizeof(int16_t));

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

  629. 	{

  630. 		int i;

  631. 		filterSize= 1;

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

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

  634. 

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

  636. 		{

  637. 			filter[i*filterSize]=1;

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

  639. 		}

  640. 

  641. 	}

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

  643. 	{

  644. 		int i;

  645. 		int xDstInSrc;

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

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

  648. 		else			   filterSize= 2;

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

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

  651. 

  652. 		xDstInSrc= xInc/2 - 0x8000;

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

  654. 		{

  655. 			int xx= (xDstInSrc>>16) - (filterSize>>1) + 1;

  656. 			int j;

  657. 

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

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

  660. 			{

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

  662. 				double y1,y2,y3,y4;

  663. 				double A= -0.6;

  664. 				if(flags & SWS_BICUBIC){

  665. 						// Equation is from VirtualDub

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

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

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

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

  670. 				}else{

  671. 						// cubic interpolation (derived it myself)

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

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

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

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

  676. 				}

  677. 

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

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

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

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

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

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

  684. 			}

  685. 			else

  686. 			{

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

  688. 				{

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

  690. 					double coeff= 1.0 - d;

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

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

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

  694. 					xx++;

  695. 				}

  696. 			}

  697. 			xDstInSrc+= xInc;

  698. 		}

  699. 	}

  700. 	else // downscale

  701. 	{

  702. 		int xDstInSrc;

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

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

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

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

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

  708. 

  709. 		xDstInSrc= xInc/2 - 0x8000;

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

  711. 		{

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

  713. 			int j;

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

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

  716. 			{

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

  718. 				double coeff;

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

  720. 				{

  721. 					double A= -0.75;

  722. //					d*=2;

  723. 					// Equation is from VirtualDub

  724. 					if(d<1.0)

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

  726. 					else if(d<2.0)

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

  728. 					else

  729. 						coeff=0.0;

  730. 				}

  731. /*				else if(flags & SWS_X)

  732. 				{

  733. 				}*/

  734. 				else

  735. 				{

  736. 					coeff= 1.0 - d;

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

  738. 				}

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

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

  741. 				xx++;

  742. 			}

  743. 			xDstInSrc+= xInc;

  744. 		}

  745. 	}

  746. 

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

  748. 	   free(filter);

  749. 	*/

  750. 	filter2Size= filterSize;

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

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

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

  754. 

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

  756. 	{

  757. 		int j;

  758. 		SwsVector scaleFilter;

  759. 		SwsVector *outVec;

  760. 

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

  762. 		scaleFilter.length= filterSize;

  763. 

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

  765. 		else	      outVec= &scaleFilter;

  766. 

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

  768. 		//FIXME dstFilter

  769. 

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

  771. 		{

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

  773. 		}

  774. 

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

  776. 

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

  778. 	}

  779. 	free(filter); filter=NULL;

  780. 

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

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

  783. 	minFilterSize= 0;

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

  785. 	{

  786. 		int min= filter2Size;

  787. 		int j;

  788. 		double cutOff=0.0;

  789. 

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

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

  792. 		{

  793. 			int k;

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

  795. 

  796. 			if(cutOff > SWS_MAX_REDUCE_CUTOFF) break;

  797. 

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

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

  800. 

  801. 			// Move filter coeffs left

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

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

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

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

  806. 		}

  807. 

  808. 		cutOff=0.0;

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

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

  811. 		{

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

  813. 

  814. 			if(cutOff > SWS_MAX_REDUCE_CUTOFF) break;

  815. 			min--;

  816. 		}

  817. 

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

  819. 	}

  820. 

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

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

  823. 	{

  824. 		int j;

  825. 

  826. 		for(j=0; j<minFilterSize; j++)

  827. 			filter2[i*minFilterSize + j]= filter2[i*filter2Size + j];

  828. 	}

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

  830. 		printf("SwScaler: reducing filtersize %d -> %d\n", filter2Size, minFilterSize);

  831. 	filter2Size= minFilterSize;

  832. 	ASSERT(filter2Size > 0)

  833. 

  834. 	//FIXME try to align filterpos if possible

  835. 

  836. 	//fix borders

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

  838. 	{

  839. 		int j;

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

  841. 		{

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

  843. 			for(j=1; j<filter2Size; j++)

  844. 			{

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

  846. 				filter2[i*filter2Size + left] += filter2[i*filter2Size + j];

  847. 				filter2[i*filter2Size + j]=0;

  848. 			}

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

  850. 		}

  851. 

  852. 		if((*filterPos)[i] + filter2Size > srcW)

  853. 		{

  854. 			int shift= (*filterPos)[i] + filter2Size - srcW;

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

  856. 			for(j=filter2Size-2; j>=0; j--)

  857. 			{

  858. 				int right= MIN(j + shift, filter2Size-1);

  859. 				filter2[i*filter2Size +right] += filter2[i*filter2Size +j];

  860. 				filter2[i*filter2Size +j]=0;

  861. 			}

  862. 			(*filterPos)[i]= srcW - filter2Size;

  863. 		}

  864. 	}

  865. 

  866. 

  867. 	*outFilterSize= (filter2Size +(filterAlign-1)) & (~(filterAlign-1));

  868. 	*outFilter= (int16_t*)memalign(8, *outFilterSize*dstW*sizeof(int16_t));

  869. 	memset(*outFilter, 0, *outFilterSize*dstW*sizeof(int16_t));

  870. 

  871. 	/* Normalize & Store in outFilter */

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

  873. 	{

  874. 		int j;

  875. 		double sum=0;

  876. 		double scale= one;

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

  878. 		{

  879. 			sum+= filter2[i*filter2Size + j];

  880. 		}

  881. 		scale/= sum;

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

  883. 		{

  884. 			(*outFilter)[i*(*outFilterSize) + j]= (int)(filter2[i*filter2Size + j]*scale);

  885. 		}

  886. 	}

  887. 

  888. 	free(filter2);

  889. }

  890. 

  891. #ifdef ARCH_X86

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

  893. {

  894. 	uint8_t *fragment;

  895. 	int imm8OfPShufW1;

  896. 	int imm8OfPShufW2;

  897. 	int fragmentLength;

  898. 

  899. 	int xpos, i;

  900. 

  901. 	// create an optimized horizontal scaling routine

  902. 

  903. 	//code fragment

  904. 

  905. 	asm volatile(

  906. 		"jmp 9f				\n\t"

  907. 	// Begin

  908. 		"0:				\n\t"

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

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

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

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

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

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

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

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

  917. 		"1:				\n\t"

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

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

  920. 		"2:				\n\t"

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

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

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

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

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

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

  927. 

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

  929. 

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

  931. 	// End

  932. 		"9:				\n\t"

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

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

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

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

  937. 		"decl %1			\n\t"

  938. 		"decl %2			\n\t"

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

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

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

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

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

  944. 		"=r" (fragmentLength)

  945. 	);

  946. 

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

  948. 

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

  950. 	{

  951. 		int xx=xpos>>16;

  952. 

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

  954. 		{

  955. 			int a=0;

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

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

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

  959. 

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

  961. 

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

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

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

  965. 

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

  967. 			// crossing a cache line

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

  969. 

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

  971. 		}

  972. 		xpos+=xInc;

  973. 	}

  974. }

  975. #endif // ARCH_X86

  976. 

  977. //FIXME remove

  978. void SwScale_Init(){

  979. }

  980. 

  981. static void globalInit(){

  982.     // generating tables:

  983.     int i;

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

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

  986. 	clip_table[i]=c;

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

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

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

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

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

  992.     }

  993. 

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

  995.     {

  996. 	int v= clip_table[i];

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

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

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

  1000. 	clip_table15b[i]= v>>3;

  1001. 	clip_table15g[i]= (v<<2)&0x03E0;

  1002. 	clip_table15r[i]= (v<<7)&0x7C00;

  1003.     }

  1004. 

  1005. cpuCaps= gCpuCaps;

  1006. 

  1007. #ifdef RUNTIME_CPUDETECT

  1008. #ifdef CAN_COMPILE_X86_ASM

  1009. 	// ordered per speed fasterst first

  1010. 	if(gCpuCaps.hasMMX2)

  1011. 		swScale= swScale_MMX2;

  1012. 	else if(gCpuCaps.has3DNow)

  1013. 		swScale= swScale_3DNow;

  1014. 	else if(gCpuCaps.hasMMX)

  1015. 		swScale= swScale_MMX;

  1016. 	else

  1017. 		swScale= swScale_C;

  1018. 

  1019. #else

  1020. 	swScale= swScale_C;

  1021. 	cpuCaps.hasMMX2 = cpuCaps.hasMMX = cpuCaps.has3DNow = 0;

  1022. #endif

  1023. #else //RUNTIME_CPUDETECT

  1024. #ifdef HAVE_MMX2

  1025. 	swScale= swScale_MMX2;

  1026. 	cpuCaps.has3DNow = 0;

  1027. #elif defined (HAVE_3DNOW)

  1028. 	swScale= swScale_3DNow;

  1029. 	cpuCaps.hasMMX2 = 0;

  1030. #elif defined (HAVE_MMX)

  1031. 	swScale= swScale_MMX;

  1032. 	cpuCaps.hasMMX2 = cpuCaps.has3DNow = 0;

  1033. #else

  1034. 	swScale= swScale_C;

  1035. 	cpuCaps.hasMMX2 = cpuCaps.hasMMX = cpuCaps.has3DNow = 0;

  1036. #endif

  1037. #endif //!RUNTIME_CPUDETECT

  1038. }

  1039. 

  1040. 

  1041. SwsContext *getSwsContext(int srcW, int srcH, int srcFormat, int dstW, int dstH, int dstFormat, int flags,

  1042.                          SwsFilter *srcFilter, SwsFilter *dstFilter){

  1043. 

  1044. 	const int widthAlign= dstFormat==IMGFMT_YV12 ? 16 : 8;

  1045. 	SwsContext *c;

  1046. 	int i;

  1047. 	SwsFilter dummyFilter= {NULL, NULL, NULL, NULL};

  1048. 

  1049. #ifdef ARCH_X86

  1050. 	if(gCpuCaps.hasMMX)

  1051. 		asm volatile("emms\n\t"::: "memory");

  1052. #endif

  1053. 

  1054. 	if(swScale==NULL) globalInit();

  1055. 

  1056. 	/* sanity check */

  1057. 	if(srcW<1 || srcH<1 || dstW<1 || dstH<1) return NULL;

  1058. 

  1059. /* FIXME

  1060. 	if(dstStride[0]%widthAlign !=0 )

  1061. 	{

  1062. 		if(flags & SWS_PRINT_INFO)

  1063. 			fprintf(stderr, "SwScaler: Warning: dstStride is not a multiple of %d!\n"

  1064. 					"SwScaler:          ->cannot do aligned memory acesses anymore\n",

  1065. 					widthAlign);

  1066. 	}

  1067. */

  1068. 	if(!dstFilter) dstFilter= &dummyFilter;

  1069. 	if(!srcFilter) srcFilter= &dummyFilter;

  1070. 

  1071. 	c= memalign(64, sizeof(SwsContext));

  1072. 	memset(c, 0, sizeof(SwsContext));

  1073. 

  1074. 	c->srcW= srcW;

  1075. 	c->srcH= srcH;

  1076. 	c->dstW= dstW;

  1077. 	c->dstH= dstH;

  1078. 	c->lumXInc= ((srcW<<16) + (dstW>>1))/dstW;

  1079. 	c->lumYInc= ((srcH<<16) + (dstH>>1))/dstH;

  1080. 	c->flags= flags;

  1081. 	c->dstFormat= dstFormat;

  1082. 	c->srcFormat= srcFormat;

  1083. 

  1084. 	if(cpuCaps.hasMMX2)

  1085. 	{

  1086. 		c->canMMX2BeUsed= (dstW >=srcW && (dstW&31)==0 && (srcW&15)==0) ? 1 : 0;

  1087. 		if(!c->canMMX2BeUsed && dstW >=srcW && (srcW&15)==0 && (flags&SWS_FAST_BILINEAR))

  1088. 		{

  1089. 			if(flags&SWS_PRINT_INFO)

  1090. 				fprintf(stderr, "SwScaler: output Width is not a multiple of 32 -> no MMX2 scaler\n");

  1091. 		}

  1092. 	}

  1093. 	else

  1094. 		c->canMMX2BeUsed=0;

  1095. 

  1096. 	// match pixel 0 of the src to pixel 0 of dst and match pixel n-2 of src to pixel n-2 of dst

  1097. 	// but only for the FAST_BILINEAR mode otherwise do correct scaling

  1098. 	// n-2 is the last chrominance sample available

  1099. 	// this is not perfect, but noone shuld notice the difference, the more correct variant

  1100. 	// would be like the vertical one, but that would require some special code for the

  1101. 	// first and last pixel

  1102. 	if(flags&SWS_FAST_BILINEAR)

  1103. 	{

  1104. 		if(c->canMMX2BeUsed) 	c->lumXInc+= 20;

  1105. 		//we dont use the x86asm scaler if mmx is available

  1106. 		else if(cpuCaps.hasMMX)	c->lumXInc = ((srcW-2)<<16)/(dstW-2) - 20;

  1107. 	}

  1108. 

  1109. 	/* set chrXInc & chrDstW */

  1110. 	if((flags&SWS_FULL_UV_IPOL) && dstFormat!=IMGFMT_YV12)

  1111. 		c->chrXInc= c->lumXInc>>1, c->chrDstW= dstW;

  1112. 	else

  1113. 		c->chrXInc= c->lumXInc,    c->chrDstW= (dstW+1)>>1;

  1114. 

  1115. 	/* set chrYInc & chrDstH */

  1116. 	if(dstFormat==IMGFMT_YV12)	c->chrYInc= c->lumYInc,    c->chrDstH= (dstH+1)>>1;

  1117. 	else				c->chrYInc= c->lumYInc>>1, c->chrDstH= dstH;

  1118. 

  1119. 	/* precalculate horizontal scaler filter coefficients */

  1120. 	{

  1121. 		const int filterAlign= cpuCaps.hasMMX ? 4 : 1;

  1122. 

  1123. 		initFilter(&c->hLumFilter, &c->hLumFilterPos, &c->hLumFilterSize, c->lumXInc,

  1124. 				 srcW      ,       dstW, filterAlign, 1<<14, flags,

  1125. 				 srcFilter->lumH, dstFilter->lumH);

  1126. 		initFilter(&c->hChrFilter, &c->hChrFilterPos, &c->hChrFilterSize, c->chrXInc,

  1127. 				(srcW+1)>>1, c->chrDstW, filterAlign, 1<<14, flags,

  1128. 				 srcFilter->chrH, dstFilter->chrH);

  1129. 

  1130. #ifdef ARCH_X86

  1131. // cant downscale !!!

  1132. 		if(c->canMMX2BeUsed && (flags & SWS_FAST_BILINEAR))

  1133. 		{

  1134. 			initMMX2HScaler(      dstW, c->lumXInc, c->funnyYCode);

  1135. 			initMMX2HScaler(c->chrDstW, c->chrXInc, c->funnyUVCode);

  1136. 		}

  1137. #endif

  1138. 	} // Init Horizontal stuff

  1139. 

  1140. 

  1141. 

  1142. 	/* precalculate vertical scaler filter coefficients */

  1143. 	initFilter(&c->vLumFilter, &c->vLumFilterPos, &c->vLumFilterSize, c->lumYInc,

  1144. 			srcH      ,        dstH, 1, (1<<12)-4, flags,

  1145. 			srcFilter->lumV, dstFilter->lumV);

  1146. 	initFilter(&c->vChrFilter, &c->vChrFilterPos, &c->vChrFilterSize, c->chrYInc,

  1147. 			(srcH+1)>>1, c->chrDstH, 1, (1<<12)-4, flags,

  1148. 			 srcFilter->chrV, dstFilter->chrV);

  1149. 

  1150. 	// Calculate Buffer Sizes so that they wont run out while handling these damn slices

  1151. 	c->vLumBufSize= c->vLumFilterSize;

  1152. 	c->vChrBufSize= c->vChrFilterSize;

  1153. 	for(i=0; i<dstH; i++)

  1154. 	{

  1155. 		int chrI= i*c->chrDstH / dstH;

  1156. 		int nextSlice= MAX(c->vLumFilterPos[i   ] + c->vLumFilterSize - 1,

  1157. 				 ((c->vChrFilterPos[chrI] + c->vChrFilterSize - 1)<<1));

  1158. 		nextSlice&= ~1; // Slices start at even boundaries

  1159. 		if(c->vLumFilterPos[i   ] + c->vLumBufSize < nextSlice)

  1160. 			c->vLumBufSize= nextSlice - c->vLumFilterPos[i   ];

  1161. 		if(c->vChrFilterPos[chrI] + c->vChrBufSize < (nextSlice>>1))

  1162. 			c->vChrBufSize= (nextSlice>>1) - c->vChrFilterPos[chrI];

  1163. 	}

  1164. 

  1165. 	// allocate pixbufs (we use dynamic allocation because otherwise we would need to

  1166. 	// allocate several megabytes to handle all possible cases)

  1167. 	c->lumPixBuf= (int16_t**)memalign(4, c->vLumBufSize*2*sizeof(int16_t*));

  1168. 	c->chrPixBuf= (int16_t**)memalign(4, c->vChrBufSize*2*sizeof(int16_t*));

  1169. 	for(i=0; i<c->vLumBufSize; i++)

  1170. 		c->lumPixBuf[i]= c->lumPixBuf[i+c->vLumBufSize]= (uint16_t*)memalign(8, 4000);

  1171. 	for(i=0; i<c->vChrBufSize; i++)

  1172. 		c->chrPixBuf[i]= c->chrPixBuf[i+c->vChrBufSize]= (uint16_t*)memalign(8, 8000);

  1173. 

  1174. 	//try to avoid drawing green stuff between the right end and the stride end

  1175. 	for(i=0; i<c->vLumBufSize; i++) memset(c->lumPixBuf[i], 0, 4000);

  1176. 	for(i=0; i<c->vChrBufSize; i++) memset(c->chrPixBuf[i], 64, 8000);

  1177. 

  1178. 	ASSERT(c->chrDstH <= dstH)

  1179. 

  1180. 	// pack filter data for mmx code

  1181. 	if(cpuCaps.hasMMX)

  1182. 	{

  1183. 		c->lumMmxFilter= (int16_t*)memalign(8, c->vLumFilterSize*      dstH*4*sizeof(int16_t));

  1184. 		c->chrMmxFilter= (int16_t*)memalign(8, c->vChrFilterSize*c->chrDstH*4*sizeof(int16_t));

  1185. 		for(i=0; i<c->vLumFilterSize*dstH; i++)

  1186. 			c->lumMmxFilter[4*i]=c->lumMmxFilter[4*i+1]=c->lumMmxFilter[4*i+2]=c->lumMmxFilter[4*i+3]=

  1187. 				c->vLumFilter[i];

  1188. 		for(i=0; i<c->vChrFilterSize*c->chrDstH; i++)

  1189. 			c->chrMmxFilter[4*i]=c->chrMmxFilter[4*i+1]=c->chrMmxFilter[4*i+2]=c->chrMmxFilter[4*i+3]=

  1190. 				c->vChrFilter[i];

  1191. 	}

  1192. 

  1193. 	if(flags&SWS_PRINT_INFO)

  1194. 	{

  1195. #ifdef DITHER1XBPP

  1196. 		char *dither= " dithered";

  1197. #else

  1198. 		char *dither= "";

  1199. #endif

  1200. 		if(flags&SWS_FAST_BILINEAR)

  1201. 			fprintf(stderr, "\nSwScaler: FAST_BILINEAR scaler ");

  1202. 		else if(flags&SWS_BILINEAR)

  1203. 			fprintf(stderr, "\nSwScaler: BILINEAR scaler ");

  1204. 		else if(flags&SWS_BICUBIC)

  1205. 			fprintf(stderr, "\nSwScaler: BICUBIC scaler ");

  1206. 		else

  1207. 			fprintf(stderr, "\nSwScaler: ehh flags invalid?! ");

  1208. 

  1209. 		if(dstFormat==IMGFMT_BGR15)

  1210. 			fprintf(stderr, "with%s BGR15 output ", dither);

  1211. 		else if(dstFormat==IMGFMT_BGR16)

  1212. 			fprintf(stderr, "with%s BGR16 output ", dither);

  1213. 		else if(dstFormat==IMGFMT_BGR24)

  1214. 			fprintf(stderr, "with BGR24 output ");

  1215. 		else if(dstFormat==IMGFMT_BGR32)

  1216. 			fprintf(stderr, "with BGR32 output ");

  1217. 		else if(dstFormat==IMGFMT_YV12)

  1218. 			fprintf(stderr, "with YV12 output ");

  1219. 		else

  1220. 			fprintf(stderr, "without output ");

  1221. 

  1222. 		if(cpuCaps.hasMMX2)

  1223. 			fprintf(stderr, "using MMX2\n");

  1224. 		else if(cpuCaps.has3DNow)

  1225. 			fprintf(stderr, "using 3DNOW\n");

  1226. 		else if(cpuCaps.hasMMX)

  1227. 			fprintf(stderr, "using MMX\n");

  1228. 		else

  1229. 			fprintf(stderr, "using C\n");

  1230. 	}

  1231. 

  1232. 	if((flags & SWS_PRINT_INFO) && verbose)

  1233. 	{

  1234. 		if(cpuCaps.hasMMX)

  1235. 		{

  1236. 			if(c->canMMX2BeUsed && (flags&SWS_FAST_BILINEAR))

  1237. 				printf("SwScaler: using FAST_BILINEAR MMX2 scaler for horizontal scaling\n");

  1238. 			else

  1239. 			{

  1240. 				if(c->hLumFilterSize==4)

  1241. 					printf("SwScaler: using 4-tap MMX scaler for horizontal luminance scaling\n");

  1242. 				else if(c->hLumFilterSize==8)

  1243. 					printf("SwScaler: using 8-tap MMX scaler for horizontal luminance scaling\n");

  1244. 				else

  1245. 					printf("SwScaler: using n-tap MMX scaler for horizontal luminance scaling\n");

  1246. 

  1247. 				if(c->hChrFilterSize==4)

  1248. 					printf("SwScaler: using 4-tap MMX scaler for horizontal chrominance scaling\n");

  1249. 				else if(c->hChrFilterSize==8)

  1250. 					printf("SwScaler: using 8-tap MMX scaler for horizontal chrominance scaling\n");

  1251. 				else

  1252. 					printf("SwScaler: using n-tap MMX scaler for horizontal chrominance scaling\n");

  1253. 			}

  1254. 		}

  1255. 		else

  1256. 		{

  1257. #ifdef ARCH_X86

  1258. 			printf("SwScaler: using X86-Asm scaler for horizontal scaling\n");

  1259. #else

  1260. 			if(flags & SWS_FAST_BILINEAR)

  1261. 				printf("SwScaler: using FAST_BILINEAR C scaler for horizontal scaling\n");

  1262. 			else

  1263. 				printf("SwScaler: using C scaler for horizontal scaling\n");

  1264. #endif

  1265. 		}

  1266. 		if(dstFormat==IMGFMT_YV12)

  1267. 		{

  1268. 			if(c->vLumFilterSize==1)

  1269. 				printf("SwScaler: using 1-tap %s \"scaler\" for vertical scaling (YV12)\n", cpuCaps.hasMMX ? "MMX" : "C");

  1270. 			else

  1271. 				printf("SwScaler: using n-tap %s scaler for vertical scaling (YV12)\n", cpuCaps.hasMMX ? "MMX" : "C");

  1272. 		}

  1273. 		else

  1274. 		{

  1275. 			if(c->vLumFilterSize==1 && c->vChrFilterSize==2)

  1276. 				printf("SwScaler: using 1-tap %s \"scaler\" for vertical luminance scaling (BGR)\n"

  1277. 				       "SwScaler:       2-tap scaler for vertical chrominance scaling (BGR)\n",cpuCaps.hasMMX ? "MMX" : "C");

  1278. 			else if(c->vLumFilterSize==2 && c->vChrFilterSize==2)

  1279. 				printf("SwScaler: using 2-tap linear %s scaler for vertical scaling (BGR)\n", cpuCaps.hasMMX ? "MMX" : "C");

  1280. 			else

  1281. 				printf("SwScaler: using n-tap %s scaler for vertical scaling (BGR)\n", cpuCaps.hasMMX ? "MMX" : "C");

  1282. 		}

  1283. 

  1284. 		if(dstFormat==IMGFMT_BGR24)

  1285. 			printf("SwScaler: using %s YV12->BGR24 Converter\n",

  1286. 				cpuCaps.hasMMX2 ? "MMX2" : (cpuCaps.hasMMX ? "MMX" : "C"));

  1287. 		else if(dstFormat==IMGFMT_BGR32)

  1288. 			printf("SwScaler: using %s YV12->BGR32 Converter\n", cpuCaps.hasMMX ? "MMX" : "C");

  1289. 		else if(dstFormat==IMGFMT_BGR16)

  1290. 			printf("SwScaler: using %s YV12->BGR16 Converter\n", cpuCaps.hasMMX ? "MMX" : "C");

  1291. 		else if(dstFormat==IMGFMT_BGR15)

  1292. 			printf("SwScaler: using %s YV12->BGR15 Converter\n", cpuCaps.hasMMX ? "MMX" : "C");

  1293. 

  1294. 		printf("SwScaler: %dx%d -> %dx%d\n", srcW, srcH, dstW, dstH);

  1295. 	}

  1296. 

  1297. 	return c;

  1298. }

  1299. 

  1300. /**

  1301.  * returns a normalized gaussian curve used to filter stuff

  1302.  * quality=3 is high quality, lowwer is lowwer quality

  1303.  */

  1304. 

  1305. SwsVector *getGaussianVec(double variance, double quality){

  1306. 	const int length= (int)(variance*quality + 0.5) | 1;

  1307. 	int i;

  1308. 	double *coeff= memalign(sizeof(double), length*sizeof(double));

  1309. 	double middle= (length-1)*0.5;

  1310. 	SwsVector *vec= malloc(sizeof(SwsVector));

  1311. 

  1312. 	vec->coeff= coeff;

  1313. 	vec->length= length;

  1314. 

  1315. 	for(i=0; i<length; i++)

  1316. 	{

  1317. 		double dist= i-middle;

  1318. 		coeff[i]= exp( -dist*dist/(2*variance*variance) ) / sqrt(2*variance*PI);

  1319. 	}

  1320. 

  1321. 	normalizeVec(vec, 1.0);

  1322. 

  1323. 	return vec;

  1324. }

  1325. 

  1326. SwsVector *getConstVec(double c, int length){

  1327. 	int i;

  1328. 	double *coeff= memalign(sizeof(double), length*sizeof(double));

  1329. 	SwsVector *vec= malloc(sizeof(SwsVector));

  1330. 

  1331. 	vec->coeff= coeff;

  1332. 	vec->length= length;

  1333. 

  1334. 	for(i=0; i<length; i++)

  1335. 		coeff[i]= c;

  1336. 

  1337. 	return vec;

  1338. }

  1339. 

  1340. 

  1341. SwsVector *getIdentityVec(void){

  1342. 	double *coeff= memalign(sizeof(double), sizeof(double));

  1343. 	SwsVector *vec= malloc(sizeof(SwsVector));

  1344. 	coeff[0]= 1.0;

  1345. 

  1346. 	vec->coeff= coeff;

  1347. 	vec->length= 1;

  1348. 

  1349. 	return vec;

  1350. }

  1351. 

  1352. void normalizeVec(SwsVector *a, double height){

  1353. 	int i;

  1354. 	double sum=0;

  1355. 	double inv;

  1356. 

  1357. 	for(i=0; i<a->length; i++)

  1358. 		sum+= a->coeff[i];

  1359. 

  1360. 	inv= height/sum;

  1361. 

  1362. 	for(i=0; i<a->length; i++)

  1363. 		a->coeff[i]*= height;

  1364. }

  1365. 

  1366. void scaleVec(SwsVector *a, double scalar){

  1367. 	int i;

  1368. 

  1369. 	for(i=0; i<a->length; i++)

  1370. 		a->coeff[i]*= scalar;

  1371. }

  1372. 

  1373. static SwsVector *getConvVec(SwsVector *a, SwsVector *b){

  1374. 	int length= a->length + b->length - 1;

  1375. 	double *coeff= memalign(sizeof(double), length*sizeof(double));

  1376. 	int i, j;

  1377. 	SwsVector *vec= malloc(sizeof(SwsVector));

  1378. 

  1379. 	vec->coeff= coeff;

  1380. 	vec->length= length;

  1381. 

  1382. 	for(i=0; i<length; i++) coeff[i]= 0.0;

  1383. 

  1384. 	for(i=0; i<a->length; i++)

  1385. 	{

  1386. 		for(j=0; j<b->length; j++)

  1387. 		{

  1388. 			coeff[i+j]+= a->coeff[i]*b->coeff[j];

  1389. 		}

  1390. 	}

  1391. 

  1392. 	return vec;

  1393. }

  1394. 

  1395. static SwsVector *sumVec(SwsVector *a, SwsVector *b){

  1396. 	int length= MAX(a->length, b->length);

  1397. 	double *coeff= memalign(sizeof(double), length*sizeof(double));

  1398. 	int i;

  1399. 	SwsVector *vec= malloc(sizeof(SwsVector));

  1400. 

  1401. 	vec->coeff= coeff;

  1402. 	vec->length= length;

  1403. 

  1404. 	for(i=0; i<length; i++) coeff[i]= 0.0;

  1405. 

  1406. 	for(i=0; i<a->length; i++) coeff[i + (length-1)/2 - (a->length-1)/2]+= a->coeff[i];

  1407. 	for(i=0; i<b->length; i++) coeff[i + (length-1)/2 - (b->length-1)/2]+= b->coeff[i];

  1408. 

  1409. 	return vec;

  1410. }

  1411. 

  1412. static SwsVector *diffVec(SwsVector *a, SwsVector *b){

  1413. 	int length= MAX(a->length, b->length);

  1414. 	double *coeff= memalign(sizeof(double), length*sizeof(double));

  1415. 	int i;

  1416. 	SwsVector *vec= malloc(sizeof(SwsVector));

  1417. 

  1418. 	vec->coeff= coeff;

  1419. 	vec->length= length;

  1420. 

  1421. 	for(i=0; i<length; i++) coeff[i]= 0.0;

  1422. 

  1423. 	for(i=0; i<a->length; i++) coeff[i + (length-1)/2 - (a->length-1)/2]+= a->coeff[i];

  1424. 	for(i=0; i<b->length; i++) coeff[i + (length-1)/2 - (b->length-1)/2]-= b->coeff[i];

  1425. 

  1426. 	return vec;

  1427. }

  1428. 

  1429. /* shift left / or right if "shift" is negative */

  1430. static SwsVector *getShiftedVec(SwsVector *a, int shift){

  1431. 	int length= a->length + ABS(shift)*2;

  1432. 	double *coeff= memalign(sizeof(double), length*sizeof(double));

  1433. 	int i, j;

  1434. 	SwsVector *vec= malloc(sizeof(SwsVector));

  1435. 

  1436. 	vec->coeff= coeff;

  1437. 	vec->length= length;

  1438. 

  1439. 	for(i=0; i<length; i++) coeff[i]= 0.0;

  1440. 

  1441. 	for(i=0; i<a->length; i++)

  1442. 	{

  1443. 		coeff[i + (length-1)/2 - (a->length-1)/2 - shift]= a->coeff[i];

  1444. 	}

  1445. 

  1446. 	return vec;

  1447. }

  1448. 

  1449. void shiftVec(SwsVector *a, int shift){

  1450. 	SwsVector *shifted= getShiftedVec(a, shift);

  1451. 	free(a->coeff);

  1452. 	a->coeff= shifted->coeff;

  1453. 	a->length= shifted->length;

  1454. 	free(shifted);

  1455. }

  1456. 

  1457. void addVec(SwsVector *a, SwsVector *b){

  1458. 	SwsVector *sum= sumVec(a, b);

  1459. 	free(a->coeff);

  1460. 	a->coeff= sum->coeff;

  1461. 	a->length= sum->length;

  1462. 	free(sum);

  1463. }

  1464. 

  1465. void subVec(SwsVector *a, SwsVector *b){

  1466. 	SwsVector *diff= diffVec(a, b);

  1467. 	free(a->coeff);

  1468. 	a->coeff= diff->coeff;

  1469. 	a->length= diff->length;

  1470. 	free(diff);

  1471. }

  1472. 

  1473. void convVec(SwsVector *a, SwsVector *b){

  1474. 	SwsVector *conv= getConvVec(a, b);

  1475. 	free(a->coeff);

  1476. 	a->coeff= conv->coeff;

  1477. 	a->length= conv->length;

  1478. 	free(conv);

  1479. }

  1480. 

  1481. SwsVector *cloneVec(SwsVector *a){

  1482. 	double *coeff= memalign(sizeof(double), a->length*sizeof(double));

  1483. 	int i;

  1484. 	SwsVector *vec= malloc(sizeof(SwsVector));

  1485. 

  1486. 	vec->coeff= coeff;

  1487. 	vec->length= a->length;

  1488. 

  1489. 	for(i=0; i<a->length; i++) coeff[i]= a->coeff[i];

  1490. 

  1491. 	return vec;

  1492. }

  1493. 

  1494. void printVec(SwsVector *a){

  1495. 	int i;

  1496. 	double max=0;

  1497. 	double min=0;

  1498. 	double range;

  1499. 

  1500. 	for(i=0; i<a->length; i++)

  1501. 		if(a->coeff[i]>max) max= a->coeff[i];

  1502. 

  1503. 	for(i=0; i<a->length; i++)

  1504. 		if(a->coeff[i]<min) min= a->coeff[i];

  1505. 

  1506. 	range= max - min;

  1507. 

  1508. 	for(i=0; i<a->length; i++)

  1509. 	{

  1510. 		int x= (int)((a->coeff[i]-min)*60.0/range +0.5);

  1511. 		printf("%1.3f ", a->coeff[i]);

  1512. 		for(;x>0; x--) printf(" ");

  1513. 		printf("|\n");

  1514. 	}

  1515. }

  1516. 

  1517. void freeVec(SwsVector *a){

  1518. 	if(!a) return;

  1519. 	if(a->coeff) free(a->coeff);

  1520. 	a->coeff=NULL;

  1521. 	a->length=0;

  1522. 	free(a);

  1523. }

  1524. 

  1525. void freeSwsContext(SwsContext *c){

  1526. 	int i;

  1527. 

  1528. 	if(!c) return;

  1529. 

  1530. 	if(c->lumPixBuf)

  1531. 	{

  1532. 		for(i=0; i<c->vLumBufSize*2; i++)

  1533. 		{

  1534. 			if(c->lumPixBuf[i]) free(c->lumPixBuf[i]);

  1535. 			c->lumPixBuf[i]=NULL;

  1536. 		}

  1537. 		free(c->lumPixBuf);

  1538. 		c->lumPixBuf=NULL;

  1539. 	}

  1540. 

  1541. 	if(c->chrPixBuf)

  1542. 	{

  1543. 		for(i=0; i<c->vChrBufSize*2; i++)

  1544. 		{

  1545. 			if(c->chrPixBuf[i]) free(c->chrPixBuf[i]);

  1546. 			c->chrPixBuf[i]=NULL;

  1547. 		}

  1548. 		free(c->chrPixBuf);

  1549. 		c->chrPixBuf=NULL;

  1550. 	}

  1551. 

  1552. 	if(c->vLumFilter) free(c->vLumFilter);

  1553. 	c->vLumFilter = NULL;

  1554. 	if(c->vChrFilter) free(c->vChrFilter);

  1555. 	c->vChrFilter = NULL;

  1556. 	if(c->hLumFilter) free(c->hLumFilter);

  1557. 	c->hLumFilter = NULL;

  1558. 	if(c->hChrFilter) free(c->hChrFilter);

  1559. 	c->hChrFilter = NULL;

  1560. 

  1561. 	if(c->vLumFilterPos) free(c->vLumFilterPos);

  1562. 	c->vLumFilterPos = NULL;

  1563. 	if(c->vChrFilterPos) free(c->vChrFilterPos);

  1564. 	c->vChrFilterPos = NULL;

  1565. 	if(c->hLumFilterPos) free(c->hLumFilterPos);

  1566. 	c->hLumFilterPos = NULL;

  1567. 	if(c->hChrFilterPos) free(c->hChrFilterPos);

  1568. 	c->hChrFilterPos = NULL;

  1569. 

  1570. 	if(c->lumMmxFilter) free(c->lumMmxFilter);

  1571. 	c->lumMmxFilter = NULL;

  1572. 	if(c->chrMmxFilter) free(c->chrMmxFilter);

  1573. 	c->chrMmxFilter = NULL;

  1574. 

  1575. 	free(c);

  1576. }

  1577.