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FFmpeg/postproc/swscale.c

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  1. 

  2. // Software scaling and colorspace conversion routines for MPlayer

  3. 

  4. // Orginal C implementation by A'rpi/ESP-team <arpi@thot.banki.hu>

  5. // current version mostly by Michael Niedermayer (michaelni@gmx.at)

  6. // the parts written by michael are under GNU GPL

  7. 

  8. #include <inttypes.h>

  9. #include <string.h>

  10. #include <math.h>

  11. #include <stdio.h>

  12. #include "../config.h"

  13. #ifdef HAVE_MALLOC_H

  14. #include <malloc.h>

  15. #endif

  16. #include "swscale.h"

  17. #include "../cpudetect.h"

  18. #undef MOVNTQ

  19. #undef PAVGB

  20. 

  21. //#undef HAVE_MMX2

  22. //#undef HAVE_MMX

  23. //#undef ARCH_X86

  24. #define DITHER1XBPP

  25. int fullUVIpol=0;

  26. //disables the unscaled height version

  27. int allwaysIpol=0;

  28. 

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

  30. 

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

  32. #define ASSERT(x) ;

  33. 

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

  35. /*

  36. NOTES

  37. 

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

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

  40. 

  41. Supported output formats BGR15 BGR16 BGR24 BGR32 YV12

  42. BGR15 & BGR16 MMX verions support dithering

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

  44. 

  45. TODO

  46. more intelligent missalignment avoidance for the horizontal scaler

  47. dither in C

  48. change the distance of the u & v buffer

  49. Move static / global vars into a struct so multiple scalers can be used

  50. write special vertical cubic upscale version

  51. Optimize C code (yv12 / minmax)

  52. dstStride[3]

  53. */

  54. 

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

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

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

  58. 

  59. #ifdef ARCH_X86

  60. #define CAN_COMPILE_X86_ASM

  61. #endif

  62. 

  63. #ifdef CAN_COMPILE_X86_ASM

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  78. 

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

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

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

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

  83. 

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

  85. 	0x0103010301030103LL,

  86. 	0x0200020002000200LL,};

  87. 

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

  89. 	0x0602060206020602LL,

  90. 	0x0004000400040004LL,};

  91. 

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

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

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

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

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

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

  98. 

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

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

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

  102. 

  103. static uint64_t __attribute__((aligned(8))) temp0;

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

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

  106. 

  107. static int16_t __attribute__((aligned(8))) *lumPixBuf[2000];

  108. static int16_t __attribute__((aligned(8))) *chrPixBuf[2000];

  109. static int16_t __attribute__((aligned(8))) hLumFilter[8000];

  110. static int16_t __attribute__((aligned(8))) hLumFilterPos[2000];

  111. static int16_t __attribute__((aligned(8))) hChrFilter[8000];

  112. static int16_t __attribute__((aligned(8))) hChrFilterPos[2000];

  113. static int16_t __attribute__((aligned(8))) vLumFilter[8000];

  114. static int16_t __attribute__((aligned(8))) vLumFilterPos[2000];

  115. static int16_t __attribute__((aligned(8))) vChrFilter[8000];

  116. static int16_t __attribute__((aligned(8))) vChrFilterPos[2000];

  117. 

  118. // Contain simply the values from v(Lum|Chr)Filter just nicely packed for mmx

  119. //FIXME these are very likely too small / 8000 caused problems with 480x480

  120. static int16_t __attribute__((aligned(8))) lumMmxFilter[16000];

  121. static int16_t __attribute__((aligned(8))) chrMmxFilter[16000];

  122. #else

  123. static int16_t *lumPixBuf[2000];

  124. static int16_t *chrPixBuf[2000];

  125. static int16_t hLumFilter[8000];

  126. static int16_t hLumFilterPos[2000];

  127. static int16_t hChrFilter[8000];

  128. static int16_t hChrFilterPos[2000];

  129. static int16_t vLumFilter[8000];

  130. static int16_t vLumFilterPos[2000];

  131. static int16_t vChrFilter[8000];

  132. static int16_t vChrFilterPos[2000];

  133. //FIXME just dummy vars

  134. static int16_t lumMmxFilter[1];

  135. static int16_t chrMmxFilter[1];

  136. #endif

  137. 

  138. // clipping helper table for C implementations:

  139. static unsigned char clip_table[768];

  140. 

  141. static unsigned short clip_table16b[768];

  142. static unsigned short clip_table16g[768];

  143. static unsigned short clip_table16r[768];

  144. static unsigned short clip_table15b[768];

  145. static unsigned short clip_table15g[768];

  146. static unsigned short clip_table15r[768];

  147. 

  148. // yuv->rgb conversion tables:

  149. static    int yuvtab_2568[256];

  150. static    int yuvtab_3343[256];

  151. static    int yuvtab_0c92[256];

  152. static    int yuvtab_1a1e[256];

  153. static    int yuvtab_40cf[256];

  154. // Needed for cubic scaler to catch overflows

  155. static    int clip_yuvtab_2568[768];

  156. static    int clip_yuvtab_3343[768];

  157. static    int clip_yuvtab_0c92[768];

  158. static    int clip_yuvtab_1a1e[768];

  159. static    int clip_yuvtab_40cf[768];

  160. 

  161. static int hLumFilterSize=0;

  162. static int hChrFilterSize=0;

  163. static int vLumFilterSize=0;

  164. static int vChrFilterSize=0;

  165. static int vLumBufSize=0;

  166. static int vChrBufSize=0;

  167. 

  168. int sws_flags=0;

  169. 

  170. #ifdef CAN_COMPILE_X86_ASM

  171. static uint8_t funnyYCode[10000];

  172. static uint8_t funnyUVCode[10000];

  173. #endif

  174. 

  175. static int canMMX2BeUsed=0;

  176. 

  177. #ifdef CAN_COMPILE_X86_ASM

  178. void in_asm_used_var_warning_killer()

  179. {

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

  181.  bm00001111+bm00000111+bm11111000+b16Mask+g16Mask+r16Mask+b15Mask+g15Mask+r15Mask+temp0+asm_yalpha1+ asm_uvalpha1+

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

  183.  if(i) i=0;

  184. }

  185. #endif

  186. 

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

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

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

  190. {

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

  192. 	int i;

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

  194. 	{

  195. 		int val=0;

  196. 		int j;

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

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

  199. 

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

  201. 	}

  202. 

  203. 	if(uDest != NULL)

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

  205. 		{

  206. 			int u=0;

  207. 			int v=0;

  208. 			int j;

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

  210. 			{

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

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

  213. 			}

  214. 

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

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

  217. 		}

  218. }

  219. 

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

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

  222. 				    uint8_t *dest, int dstW, int dstbpp)

  223. {

  224. 	if(dstbpp==32)

  225. 	{

  226. 		int i;

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

  228. 			int j;

  229. 			int Y1=0;

  230. 			int Y2=0;

  231. 			int U=0;

  232. 			int V=0;

  233. 			int Cb, Cr, Cg;

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

  235. 			{

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

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

  238. 			}

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

  240. 			{

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

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

  243. 			}

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

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

  246. 			U >>= 19;

  247. 			V >>= 19;

  248. 

  249. 			Cb= clip_yuvtab_40cf[U+ 256];

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

  251. 			Cr= clip_yuvtab_3343[V+ 256];

  252. 

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

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

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

  256. 

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

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

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

  260. 		}

  261. 	}

  262. 	else if(dstbpp==24)

  263. 	{

  264. 		int i;

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

  266. 			int j;

  267. 			int Y1=0;

  268. 			int Y2=0;

  269. 			int U=0;

  270. 			int V=0;

  271. 			int Cb, Cr, Cg;

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

  273. 			{

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

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

  276. 			}

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

  278. 			{

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

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

  281. 			}

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

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

  284. 			U >>= 19;

  285. 			V >>= 19;

  286. 

  287. 			Cb= clip_yuvtab_40cf[U+ 256];

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

  289. 			Cr= clip_yuvtab_3343[V+ 256];

  290. 

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

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

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

  294. 

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

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

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

  298. 			dest+=6;

  299. 		}

  300. 	}

  301. 	else if(dstbpp==16)

  302. 	{

  303. 		int i;

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

  305. 			int j;

  306. 			int Y1=0;

  307. 			int Y2=0;

  308. 			int U=0;

  309. 			int V=0;

  310. 			int Cb, Cr, Cg;

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

  312. 			{

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

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

  315. 			}

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

  317. 			{

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

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

  320. 			}

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

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

  323. 			U >>= 19;

  324. 			V >>= 19;

  325. 

  326. 			Cb= clip_yuvtab_40cf[U+ 256];

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

  328. 			Cr= clip_yuvtab_3343[V+ 256];

  329. 

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

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

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

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

  334. 

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

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

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

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

  339. 		}

  340. 	}

  341. 	else if(dstbpp==15)

  342. 	{

  343. 		int i;

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

  345. 			int j;

  346. 			int Y1=0;

  347. 			int Y2=0;

  348. 			int U=0;

  349. 			int V=0;

  350. 			int Cb, Cr, Cg;

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

  352. 			{

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

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

  355. 			}

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

  357. 			{

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

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

  360. 			}

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

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

  363. 			U >>= 19;

  364. 			V >>= 19;

  365. 

  366. 			Cb= clip_yuvtab_40cf[U+ 256];

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

  368. 			Cr= clip_yuvtab_3343[V+ 256];

  369. 

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

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

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

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

  374. 

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

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

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

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

  379. 		}

  380. 	}

  381. }

  382. 

  383. 

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

  385. //Plain C versions

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

  387. #define COMPILE_C

  388. #endif

  389. 

  390. #ifdef CAN_COMPILE_X86_ASM

  391. 

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

  393. #define COMPILE_MMX

  394. #endif

  395. 

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

  397. #define COMPILE_MMX2

  398. #endif

  399. 

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

  401. #define COMPILE_3DNOW

  402. #endif

  403. #endif //CAN_COMPILE_X86_ASM

  404. 

  405. #undef HAVE_MMX

  406. #undef HAVE_MMX2

  407. #undef HAVE_3DNOW

  408. #undef ARCH_X86

  409. 

  410. #ifdef COMPILE_C

  411. #undef HAVE_MMX

  412. #undef HAVE_MMX2

  413. #undef HAVE_3DNOW

  414. #undef ARCH_X86

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

  416. #include "swscale_template.c"

  417. #endif

  418. 

  419. #ifdef CAN_COMPILE_X86_ASM

  420. 

  421. //X86 versions

  422. /*

  423. #undef RENAME

  424. #undef HAVE_MMX

  425. #undef HAVE_MMX2

  426. #undef HAVE_3DNOW

  427. #define ARCH_X86

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

  429. #include "swscale_template.c"

  430. */

  431. //MMX versions

  432. #ifdef COMPILE_MMX

  433. #undef RENAME

  434. #define HAVE_MMX

  435. #undef HAVE_MMX2

  436. #undef HAVE_3DNOW

  437. #define ARCH_X86

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

  439. #include "swscale_template.c"

  440. #endif

  441. 

  442. //MMX2 versions

  443. #ifdef COMPILE_MMX2

  444. #undef RENAME

  445. #define HAVE_MMX

  446. #define HAVE_MMX2

  447. #undef HAVE_3DNOW

  448. #define ARCH_X86

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

  450. #include "swscale_template.c"

  451. #endif

  452. 

  453. //3DNOW versions

  454. #ifdef COMPILE_3DNOW

  455. #undef RENAME

  456. #define HAVE_MMX

  457. #undef HAVE_MMX2

  458. #define HAVE_3DNOW

  459. #define ARCH_X86

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

  461. #include "swscale_template.c"

  462. #endif

  463. 

  464. #endif //CAN_COMPILE_X86_ASM

  465. 

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

  467. 

  468. 

  469. // *** bilinear scaling and yuv->rgb or yuv->yuv conversion of yv12 slices:

  470. // *** Note: it's called multiple times while decoding a frame, first time y==0

  471. // switching the cpu type during a sliced drawing can have bad effects, like sig11

  472. void SwScale_YV12slice(unsigned char* srcptr[],int stride[], int srcSliceY ,

  473. 			     int srcSliceH, uint8_t* dstptr[], int dststride, int dstbpp,

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

  475. 

  476. #ifdef RUNTIME_CPUDETECT

  477. #ifdef CAN_COMPILE_X86_ASM

  478. 	// ordered per speed fasterst first

  479. 	if(gCpuCaps.hasMMX2)

  480. 		SwScale_YV12slice_MMX2(srcptr, stride, srcSliceY, srcSliceH, dstptr, dststride, dstbpp, srcW, srcH, dstW, dstH);

  481. 	else if(gCpuCaps.has3DNow)

  482. 		SwScale_YV12slice_3DNow(srcptr, stride, srcSliceY, srcSliceH, dstptr, dststride, dstbpp, srcW, srcH, dstW, dstH);

  483. 	else if(gCpuCaps.hasMMX)

  484. 		SwScale_YV12slice_MMX(srcptr, stride, srcSliceY, srcSliceH, dstptr, dststride, dstbpp, srcW, srcH, dstW, dstH);

  485. 	else

  486. 		SwScale_YV12slice_C(srcptr, stride, srcSliceY, srcSliceH, dstptr, dststride, dstbpp, srcW, srcH, dstW, dstH);

  487. #else

  488. 		SwScale_YV12slice_C(srcptr, stride, srcSliceY, srcSliceH, dstptr, dststride, dstbpp, srcW, srcH, dstW, dstH);

  489. #endif

  490. #else //RUNTIME_CPUDETECT

  491. #ifdef HAVE_MMX2

  492. 		SwScale_YV12slice_MMX2(srcptr, stride, srcSliceY, srcSliceH, dstptr, dststride, dstbpp, srcW, srcH, dstW, dstH);

  493. #elif defined (HAVE_3DNOW)

  494. 		SwScale_YV12slice_3DNow(srcptr, stride, srcSliceY, srcSliceH, dstptr, dststride, dstbpp, srcW, srcH, dstW, dstH);

  495. #elif defined (HAVE_MMX)

  496. 		SwScale_YV12slice_MMX(srcptr, stride, srcSliceY, srcSliceH, dstptr, dststride, dstbpp, srcW, srcH, dstW, dstH);

  497. #else

  498. 		SwScale_YV12slice_C(srcptr, stride, srcSliceY, srcSliceH, dstptr, dststride, dstbpp, srcW, srcH, dstW, dstH);

  499. #endif

  500. #endif //!RUNTIME_CPUDETECT

  501. 

  502. }

  503. 

  504. void SwScale_Init(){

  505.     // generating tables:

  506.     int i;

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

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

  509. 	clip_table[i]=c;

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

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

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

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

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

  515.     }

  516. 

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

  518.     {

  519.     	int v= clip_table[i];

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

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

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

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

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

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

  526.     }

  527. 

  528. }