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FFmpeg/libswscale/swscale.c

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  1. /*

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

  3.  *

  4.  * This file is part of FFmpeg.

  5.  *

  6.  * FFmpeg is free software; you can redistribute it and/or modify

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

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

  9.  * (at your option) any later version.

  10.  *

  11.  * FFmpeg is distributed in the hope that it will be useful,

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

  13.  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

  14.  * GNU General Public License for more details.

  15.  *

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

  17.  * along with FFmpeg; if not, write to the Free Software

  18.  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA

  19.  *

  20.  * the C code (not assembly, mmx, ...) of this file can be used

  21.  * under the LGPL license too

  22.  */

  23. 

  24. /*

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

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

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

  28.   

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

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

  31.   x -> x

  32.   YUV9 -> YV12

  33.   YUV9/YV12 -> Y800

  34.   Y800 -> YUV9/YV12

  35.   BGR24 -> BGR32 & RGB24 -> RGB32

  36.   BGR32 -> BGR24 & RGB32 -> RGB24

  37.   BGR15 -> BGR16

  38. */

  39. 

  40. /* 

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

  42.  YV12 -> BGR16

  43.  YV12 -> YV12

  44.  BGR15 -> BGR16

  45.  BGR16 -> BGR16

  46.  YVU9 -> YV12

  47. 

  48. untested special converters

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

  50.   YV12/I420 -> YV12/I420

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

  52.   BGR24 -> BGR32 & RGB24 -> RGB32

  53.   BGR32 -> BGR24 & RGB32 -> RGB24

  54.   BGR24 -> YV12

  55. */

  56. 

  57. #include <inttypes.h>

  58. #include <string.h>

  59. #include <math.h>

  60. #include <stdio.h>

  61. #include <unistd.h>

  62. #include "config.h"

  63. #include <assert.h>

  64. #ifdef HAVE_SYS_MMAN_H

  65. #include <sys/mman.h>

  66. #if defined(MAP_ANON) && !defined(MAP_ANONYMOUS)

  67. #define MAP_ANONYMOUS MAP_ANON

  68. #endif

  69. #endif

  70. #include "swscale.h"

  71. #include "swscale_internal.h"

  72. #include "x86_cpu.h"

  73. #include "bswap.h"

  74. #include "rgb2rgb.h"

  75. #ifdef USE_FASTMEMCPY

  76. #include "libvo/fastmemcpy.h"

  77. #endif

  78. 

  79. #undef MOVNTQ

  80. #undef PAVGB

  81. 

  82. //#undef HAVE_MMX2

  83. //#define HAVE_3DNOW

  84. //#undef HAVE_MMX

  85. //#undef ARCH_X86

  86. //#define WORDS_BIGENDIAN

  87. #define DITHER1XBPP

  88. 

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

  90. 

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

  92. 

  93. #ifdef MP_DEBUG

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

  95. #else

  96. #define ASSERT(x) ;

  97. #endif

  98. 

  99. #ifdef M_PI

  100. #define PI M_PI

  101. #else

  102. #define PI 3.14159265358979323846

  103. #endif

  104. 

  105. #define isSupportedIn(x)  ((x)==PIX_FMT_YUV420P || (x)==PIX_FMT_YUYV422 || (x)==PIX_FMT_UYVY422\

  106. 			|| (x)==PIX_FMT_RGB32|| (x)==PIX_FMT_BGR24|| (x)==PIX_FMT_BGR565|| (x)==PIX_FMT_BGR555\

  107. 			|| (x)==PIX_FMT_BGR32|| (x)==PIX_FMT_RGB24|| (x)==PIX_FMT_RGB565|| (x)==PIX_FMT_RGB555\

  108. 			|| (x)==PIX_FMT_GRAY8 || (x)==PIX_FMT_YUV410P\

  109. 			|| (x)==PIX_FMT_GRAY16BE || (x)==PIX_FMT_GRAY16LE\

  110. 			|| (x)==PIX_FMT_YUV444P || (x)==PIX_FMT_YUV422P || (x)==PIX_FMT_YUV411P)

  111. #define isSupportedOut(x) ((x)==PIX_FMT_YUV420P || (x)==PIX_FMT_YUYV422 || (x)==PIX_FMT_UYVY422\

  112. 			|| (x)==PIX_FMT_YUV444P || (x)==PIX_FMT_YUV422P || (x)==PIX_FMT_YUV411P\

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

  114. 			|| (x)==PIX_FMT_NV12 || (x)==PIX_FMT_NV21\

  115. 			|| (x)==PIX_FMT_GRAY16BE || (x)==PIX_FMT_GRAY16LE\

  116. 			|| (x)==PIX_FMT_GRAY8 || (x)==PIX_FMT_YUV410P)

  117. #define isPacked(x)    ((x)==PIX_FMT_YUYV422 || (x)==PIX_FMT_UYVY422 ||isRGB(x) || isBGR(x))

  118. 

  119. #define RGB2YUV_SHIFT 16

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

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

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

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

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

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

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

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

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

  129. 

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

  131. 

  132. /*

  133. NOTES

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

  135. 

  136. TODO

  137. more intelligent missalignment avoidance for the horizontal scaler

  138. write special vertical cubic upscale version

  139. Optimize C code (yv12 / minmax)

  140. add support for packed pixel yuv input & output

  141. add support for Y8 output

  142. optimize bgr24 & bgr32

  143. add BGR4 output support

  144. write special BGR->BGR scaler

  145. */

  146. 

  147. #if defined(ARCH_X86) && defined (CONFIG_GPL)

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

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

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

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

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

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

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

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

  156. 

  157. static volatile uint64_t attribute_used __attribute__((aligned(8))) b5Dither;

  158. static volatile uint64_t attribute_used __attribute__((aligned(8))) g5Dither;

  159. static volatile uint64_t attribute_used __attribute__((aligned(8))) g6Dither;

  160. static volatile uint64_t attribute_used __attribute__((aligned(8))) r5Dither;

  161. 

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

  163. 	0x0103010301030103LL,

  164. 	0x0200020002000200LL,};

  165. 

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

  167. 	0x0602060206020602LL,

  168. 	0x0004000400040004LL,};

  169. 

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

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

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

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

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

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

  176. 

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

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

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

  180. 

  181. #ifdef FAST_BGR2YV12

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

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

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

  185. #else

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

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

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

  189. #endif /* FAST_BGR2YV12 */

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

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

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

  193. #endif /* defined(ARCH_X86) */

  194. 

  195. // clipping helper table for C implementations:

  196. static unsigned char clip_table[768];

  197. 

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

  199. 		  

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

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

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

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

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

  205. 

  206. static const char * sws_context_to_name(void * ptr) {

  207.     return "swscaler";

  208. }

  209. 

  210. static AVClass sws_context_class = { "SWScaler", sws_context_to_name, NULL };

  211. 

  212. char *sws_format_name(enum PixelFormat format)

  213. {

  214.     switch (format) {

  215.         case PIX_FMT_YUV420P:

  216.             return "yuv420p";

  217.         case PIX_FMT_YUYV422:

  218.             return "yuyv422";

  219.         case PIX_FMT_RGB24:

  220.             return "rgb24";

  221.         case PIX_FMT_BGR24:

  222.             return "bgr24";

  223.         case PIX_FMT_YUV422P:

  224.             return "yuv422p";

  225.         case PIX_FMT_YUV444P:

  226.             return "yuv444p";

  227.         case PIX_FMT_RGB32:

  228.             return "rgb32";

  229.         case PIX_FMT_YUV410P:

  230.             return "yuv410p";

  231.         case PIX_FMT_YUV411P:

  232.             return "yuv411p";

  233.         case PIX_FMT_RGB565:

  234.             return "rgb565";

  235.         case PIX_FMT_RGB555:

  236.             return "rgb555";

  237.         case PIX_FMT_GRAY16BE:

  238.             return "gray16be";

  239.         case PIX_FMT_GRAY16LE:

  240.             return "gray16le";

  241.         case PIX_FMT_GRAY8:

  242.             return "gray8";

  243.         case PIX_FMT_MONOWHITE:

  244.             return "mono white";

  245.         case PIX_FMT_MONOBLACK:

  246.             return "mono black";

  247.         case PIX_FMT_PAL8:

  248.             return "Palette";

  249.         case PIX_FMT_YUVJ420P:

  250.             return "yuvj420p";

  251.         case PIX_FMT_YUVJ422P:

  252.             return "yuvj422p";

  253.         case PIX_FMT_YUVJ444P:

  254.             return "yuvj444p";

  255.         case PIX_FMT_XVMC_MPEG2_MC:

  256.             return "xvmc_mpeg2_mc";

  257.         case PIX_FMT_XVMC_MPEG2_IDCT:

  258.             return "xvmc_mpeg2_idct";

  259.         case PIX_FMT_UYVY422:

  260.             return "uyvy422";

  261.         case PIX_FMT_UYYVYY411:

  262.             return "uyyvyy411";

  263.         case PIX_FMT_RGB32_1:

  264.             return "rgb32x";

  265.         case PIX_FMT_BGR32_1:

  266.             return "bgr32x";

  267.         case PIX_FMT_BGR32:

  268.             return "bgr32";

  269.         case PIX_FMT_BGR565:

  270.             return "bgr565";

  271.         case PIX_FMT_BGR555:

  272.             return "bgr555";

  273.         case PIX_FMT_BGR8:

  274.             return "bgr8";

  275.         case PIX_FMT_BGR4:

  276.             return "bgr4";

  277.         case PIX_FMT_BGR4_BYTE:

  278.             return "bgr4 byte";

  279.         case PIX_FMT_RGB8:

  280.             return "rgb8";

  281.         case PIX_FMT_RGB4:

  282.             return "rgb4";

  283.         case PIX_FMT_RGB4_BYTE:

  284.             return "rgb4 byte";

  285.         case PIX_FMT_NV12:

  286.             return "nv12";

  287.         case PIX_FMT_NV21:

  288.             return "nv21";

  289.         default:

  290.             return "Unknown format";

  291.     }

  292. }

  293. 

  294. #if defined(ARCH_X86) && defined (CONFIG_GPL)

  295. void in_asm_used_var_warning_killer()

  296. {

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

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

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

  300.  if(i) i=0;

  301. }

  302. #endif

  303. 

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

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

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

  307. {

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

  309. 	int i;

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

  311. 	{

  312. 		int val=1<<18;

  313. 		int j;

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

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

  316. 

  317. 		dest[i]= clip_uint8(val>>19);

  318. 	}

  319. 

  320. 	if(uDest != NULL)

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

  322. 		{

  323. 			int u=1<<18;

  324. 			int v=1<<18;

  325. 			int j;

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

  327. 			{

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

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

  330. 			}

  331. 

  332. 			uDest[i]= clip_uint8(u>>19);

  333. 			vDest[i]= clip_uint8(v>>19);

  334. 		}

  335. }

  336. 

  337. static inline void yuv2nv12XinC(int16_t *lumFilter, int16_t **lumSrc, int lumFilterSize,

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

  339. 				uint8_t *dest, uint8_t *uDest, int dstW, int chrDstW, int dstFormat)

  340. {

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

  342. 	int i;

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

  344. 	{

  345. 		int val=1<<18;

  346. 		int j;

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

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

  349. 

  350. 		dest[i]= clip_uint8(val>>19);

  351. 	}

  352. 

  353. 	if(uDest == NULL)

  354. 		return;

  355. 

  356. 	if(dstFormat == PIX_FMT_NV12)

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

  358. 		{

  359. 			int u=1<<18;

  360. 			int v=1<<18;

  361. 			int j;

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

  363. 			{

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

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

  366. 			}

  367. 

  368. 			uDest[2*i]= clip_uint8(u>>19);

  369. 			uDest[2*i+1]= clip_uint8(v>>19);

  370. 		}

  371. 	else

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

  373. 		{

  374. 			int u=1<<18;

  375. 			int v=1<<18;

  376. 			int j;

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

  378. 			{

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

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

  381. 			}

  382. 

  383. 			uDest[2*i]= clip_uint8(v>>19);

  384. 			uDest[2*i+1]= clip_uint8(u>>19);

  385. 		}

  386. }

  387. 

  388. #define YSCALE_YUV_2_PACKEDX_C(type) \

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

  390. 			int j;\

  391. 			int Y1=1<<18;\

  392. 			int Y2=1<<18;\

  393. 			int U=1<<18;\

  394. 			int V=1<<18;\

  395. 			type attribute_unused *r, *b, *g;\

  396. 			const int i2= 2*i;\

  397. 			\

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

  399. 			{\

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

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

  402. 			}\

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

  404. 			{\

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

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

  407. 			}\

  408. 			Y1>>=19;\

  409. 			Y2>>=19;\

  410. 			U >>=19;\

  411. 			V >>=19;\

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

  413. 			{\

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

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

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

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

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

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

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

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

  422. 			}

  423.                         

  424. #define YSCALE_YUV_2_RGBX_C(type) \

  425. 			YSCALE_YUV_2_PACKEDX_C(type)\

  426. 			r = (type *)c->table_rV[V];\

  427. 			g = (type *)(c->table_gU[U] + c->table_gV[V]);\

  428. 			b = (type *)c->table_bU[U];\

  429. 

  430. #define YSCALE_YUV_2_PACKED2_C \

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

  432. 			const int i2= 2*i;\

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

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

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

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

  437. 

  438. #define YSCALE_YUV_2_RGB2_C(type) \

  439. 			YSCALE_YUV_2_PACKED2_C\

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

  441. 			r = (type *)c->table_rV[V];\

  442. 			g = (type *)(c->table_gU[U] + c->table_gV[V]);\

  443. 			b = (type *)c->table_bU[U];\

  444. 

  445. #define YSCALE_YUV_2_PACKED1_C \

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

  447. 			const int i2= 2*i;\

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

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

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

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

  452. 

  453. #define YSCALE_YUV_2_RGB1_C(type) \

  454. 			YSCALE_YUV_2_PACKED1_C\

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

  456. 			r = (type *)c->table_rV[V];\

  457. 			g = (type *)(c->table_gU[U] + c->table_gV[V]);\

  458. 			b = (type *)c->table_bU[U];\

  459. 

  460. #define YSCALE_YUV_2_PACKED1B_C \

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

  462. 			const int i2= 2*i;\

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

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

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

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

  467. 

  468. #define YSCALE_YUV_2_RGB1B_C(type) \

  469. 			YSCALE_YUV_2_PACKED1B_C\

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

  471. 			r = (type *)c->table_rV[V];\

  472. 			g = (type *)(c->table_gU[U] + c->table_gV[V]);\

  473. 			b = (type *)c->table_bU[U];\

  474. 

  475. #define YSCALE_YUV_2_ANYRGB_C(func, func2)\

  476. 	switch(c->dstFormat)\

  477. 	{\

  478. 	case PIX_FMT_RGB32:\

  479. 	case PIX_FMT_BGR32:\

  480. 		func(uint32_t)\

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

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

  483. 		}		\

  484. 		break;\

  485. 	case PIX_FMT_RGB24:\

  486. 		func(uint8_t)\

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

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

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

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

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

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

  493. 			dest+=6;\

  494. 		}\

  495. 		break;\

  496. 	case PIX_FMT_BGR24:\

  497. 		func(uint8_t)\

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

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

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

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

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

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

  504. 			dest+=6;\

  505. 		}\

  506. 		break;\

  507. 	case PIX_FMT_RGB565:\

  508. 	case PIX_FMT_BGR565:\

  509. 		{\

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

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

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

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

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

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

  516. 			func(uint16_t)\

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

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

  519. 			}\

  520. 		}\

  521. 		break;\

  522. 	case PIX_FMT_RGB555:\

  523. 	case PIX_FMT_BGR555:\

  524. 		{\

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

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

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

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

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

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

  531. 			func(uint16_t)\

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

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

  534. 			}\

  535. 		}\

  536. 		break;\

  537. 	case PIX_FMT_RGB8:\

  538. 	case PIX_FMT_BGR8:\

  539. 		{\

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

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

  542. 			func(uint8_t)\

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

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

  545. 			}\

  546. 		}\

  547. 		break;\

  548. 	case PIX_FMT_RGB4:\

  549. 	case PIX_FMT_BGR4:\

  550. 		{\

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

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

  553. 			func(uint8_t)\

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

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

  556. 			}\

  557. 		}\

  558. 		break;\

  559. 	case PIX_FMT_RGB4_BYTE:\

  560. 	case PIX_FMT_BGR4_BYTE:\

  561. 		{\

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

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

  564. 			func(uint8_t)\

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

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

  567. 			}\

  568. 		}\

  569. 		break;\

  570. 	case PIX_FMT_MONOBLACK:\

  571. 		{\

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

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

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

  575. 				int acc;\

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

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

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

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

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

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

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

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

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

  585. 				dest++;\

  586. 			}\

  587. \

  588. /*\

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

  590. {\

  591. 			int acc=0;\

  592. 			int left=0;\

  593. 			static int top[1024];\

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

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

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

  597. 			int topLeft=0;\

  598. 			int shift=0;\

  599. 			int count=0;\

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

  601. 			int error_new=0;\

  602. 			int error_in3=0;\

  603. 			int f=0;\

  604. 			\

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

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

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

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

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

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

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

  612. \

  613. 				error_new+= FFABS(last_new[y][i] - new);\

  614. 				error_in3+= FFABS(last_in3[y][i] - in3);\

  615. 				f= error_new - error_in3*4;\

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

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

  618. \

  619. 				topLeft= top[i];\

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

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

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

  623. \

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

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

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

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

  628. 				}\

  629. 			}\

  630. }\

  631. */\

  632. 		}\

  633. 		break;\

  634. 	case PIX_FMT_YUYV422:\

  635. 		func2\

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

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

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

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

  640. 		}		\

  641. 		break;\

  642. 	case PIX_FMT_UYVY422:\

  643. 		func2\

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

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

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

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

  648. 		}		\

  649. 		break;\

  650. 	}\

  651. 

  652. 

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

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

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

  656. {

  657. 	int i;

  658. 	switch(c->dstFormat)

  659. 	{

  660. 	case PIX_FMT_BGR32:

  661. 	case PIX_FMT_RGB32:

  662. 		YSCALE_YUV_2_RGBX_C(uint32_t)

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

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

  665. 		}

  666. 		break;

  667. 	case PIX_FMT_RGB24:

  668. 		YSCALE_YUV_2_RGBX_C(uint8_t)

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

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

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

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

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

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

  675. 			dest+=6;

  676. 		}

  677. 		break;

  678. 	case PIX_FMT_BGR24:

  679. 		YSCALE_YUV_2_RGBX_C(uint8_t)

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

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

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

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

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

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

  686. 			dest+=6;

  687. 		}

  688. 		break;

  689. 	case PIX_FMT_RGB565:

  690. 	case PIX_FMT_BGR565:

  691. 		{

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

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

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

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

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

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

  698. 			YSCALE_YUV_2_RGBX_C(uint16_t)

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

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

  701. 			}

  702. 		}

  703. 		break;

  704. 	case PIX_FMT_RGB555:

  705. 	case PIX_FMT_BGR555:

  706. 		{

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

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

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

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

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

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

  713. 			YSCALE_YUV_2_RGBX_C(uint16_t)

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

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

  716. 			}

  717. 		}

  718. 		break;

  719. 	case PIX_FMT_RGB8:

  720. 	case PIX_FMT_BGR8:

  721. 		{

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

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

  724. 			YSCALE_YUV_2_RGBX_C(uint8_t)

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

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

  727. 			}

  728. 		}

  729. 		break;

  730. 	case PIX_FMT_RGB4:

  731. 	case PIX_FMT_BGR4:

  732. 		{

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

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

  735. 			YSCALE_YUV_2_RGBX_C(uint8_t)

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

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

  738. 			}

  739. 		}

  740. 		break;

  741. 	case PIX_FMT_RGB4_BYTE:

  742. 	case PIX_FMT_BGR4_BYTE:

  743. 		{

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

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

  746. 			YSCALE_YUV_2_RGBX_C(uint8_t)

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

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

  749. 			}

  750. 		}

  751. 		break;

  752. 	case PIX_FMT_MONOBLACK:

  753. 		{

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

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

  756. 			int acc=0;

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

  758. 				int j;

  759. 				int Y1=1<<18;

  760. 				int Y2=1<<18;

  761. 

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

  763. 				{

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

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

  766. 				}

  767. 				Y1>>=19;

  768. 				Y2>>=19;

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

  770. 				{

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

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

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

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

  775. 				}

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

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

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

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

  780. 					dest++;

  781. 				}

  782. 			}

  783. 		}

  784. 		break;

  785. 	case PIX_FMT_YUYV422:

  786. 		YSCALE_YUV_2_PACKEDX_C(void)

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

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

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

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

  791. 		}

  792.                 break;

  793. 	case PIX_FMT_UYVY422:

  794. 		YSCALE_YUV_2_PACKEDX_C(void)

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

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

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

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

  799. 		}

  800.                 break;

  801. 	}

  802. }

  803. 

  804. 

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

  806. //Plain C versions

  807. #if !defined (HAVE_MMX) || defined (RUNTIME_CPUDETECT) || !defined(CONFIG_GPL)

  808. #define COMPILE_C

  809. #endif

  810. 

  811. #ifdef ARCH_POWERPC

  812. #if (defined (HAVE_ALTIVEC) || defined (RUNTIME_CPUDETECT)) && defined (CONFIG_GPL)

  813. #define COMPILE_ALTIVEC

  814. #endif //HAVE_ALTIVEC

  815. #endif //ARCH_POWERPC

  816. 

  817. #if defined(ARCH_X86)

  818. 

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

  820. #define COMPILE_MMX

  821. #endif

  822. 

  823. #if (defined (HAVE_MMX2) || defined (RUNTIME_CPUDETECT)) && defined (CONFIG_GPL)

  824. #define COMPILE_MMX2

  825. #endif

  826. 

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

  828. #define COMPILE_3DNOW

  829. #endif

  830. #endif //ARCH_X86 || ARCH_X86_64

  831. 

  832. #undef HAVE_MMX

  833. #undef HAVE_MMX2

  834. #undef HAVE_3DNOW

  835. 

  836. #ifdef COMPILE_C

  837. #undef HAVE_MMX

  838. #undef HAVE_MMX2

  839. #undef HAVE_3DNOW

  840. #undef HAVE_ALTIVEC

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

  842. #include "swscale_template.c"

  843. #endif

  844. 

  845. #ifdef ARCH_POWERPC

  846. #ifdef COMPILE_ALTIVEC

  847. #undef RENAME

  848. #define HAVE_ALTIVEC

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

  850. #include "swscale_template.c"

  851. #endif

  852. #endif //ARCH_POWERPC

  853. 

  854. #if defined(ARCH_X86)

  855. 

  856. //X86 versions

  857. /*

  858. #undef RENAME

  859. #undef HAVE_MMX

  860. #undef HAVE_MMX2

  861. #undef HAVE_3DNOW

  862. #define ARCH_X86

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

  864. #include "swscale_template.c"

  865. */

  866. //MMX versions

  867. #ifdef COMPILE_MMX

  868. #undef RENAME

  869. #define HAVE_MMX

  870. #undef HAVE_MMX2

  871. #undef HAVE_3DNOW

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

  873. #include "swscale_template.c"

  874. #endif

  875. 

  876. //MMX2 versions

  877. #ifdef COMPILE_MMX2

  878. #undef RENAME

  879. #define HAVE_MMX

  880. #define HAVE_MMX2

  881. #undef HAVE_3DNOW

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

  883. #include "swscale_template.c"

  884. #endif

  885. 

  886. //3DNOW versions

  887. #ifdef COMPILE_3DNOW

  888. #undef RENAME

  889. #define HAVE_MMX

  890. #undef HAVE_MMX2

  891. #define HAVE_3DNOW

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

  893. #include "swscale_template.c"

  894. #endif

  895. 

  896. #endif //ARCH_X86 || ARCH_X86_64

  897. 

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

  899. 

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

  901. {

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

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

  904. 	else		return getSplineCoeff(	0.0, 

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

  906. 						        c + 3.0*d,

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

  908. 						dist-1.0);

  909. }

  910. 

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

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

  913. 			      SwsVector *srcFilter, SwsVector *dstFilter, double param[2])

  914. {

  915. 	int i;

  916. 	int filterSize;

  917. 	int filter2Size;

  918. 	int minFilterSize;

  919. 	double *filter=NULL;

  920. 	double *filter2=NULL;

  921. #if defined(ARCH_X86)

  922. 	if(flags & SWS_CPU_CAPS_MMX)

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

  924. #endif

  925. 

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

  927. 	*filterPos = av_malloc((dstW+1)*sizeof(int16_t));

  928. 

  929. 	if(FFABS(xInc - 0x10000) <10) // unscaled

  930. 	{

  931. 		int i;

  932. 		filterSize= 1;

  933. 		filter= av_malloc(dstW*sizeof(double)*filterSize);

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

  935. 

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

  937. 		{

  938. 			filter[i*filterSize]=1;

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

  940. 		}

  941. 

  942. 	}

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

  944. 	{

  945. 		int i;

  946. 		int xDstInSrc;

  947. 		filterSize= 1;

  948. 		filter= av_malloc(dstW*sizeof(double)*filterSize);

  949. 		

  950. 		xDstInSrc= xInc/2 - 0x8000;

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

  952. 		{

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

  954. 

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

  956. 			filter[i]= 1.0;

  957. 			xDstInSrc+= xInc;

  958. 		}

  959. 	}

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

  961. 	{

  962. 		int i;

  963. 		int xDstInSrc;

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

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

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

  967. 		filter= av_malloc(dstW*sizeof(double)*filterSize);

  968. 

  969. 		xDstInSrc= xInc/2 - 0x8000;

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

  971. 		{

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

  973. 			int j;

  974. 

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

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

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

  978. 				{

  979. 					double d= FFABS((xx<<16) - xDstInSrc)/(double)(1<<16);

  980. 					double coeff= 1.0 - d;

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

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

  983. 					xx++;

  984. 				}

  985. 			xDstInSrc+= xInc;

  986. 		}

  987. 	}

  988. 	else

  989. 	{

  990. 		double xDstInSrc;

  991. 		double sizeFactor, filterSizeInSrc;

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

  993. 

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

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

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

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

  998. 		else if(flags&SWS_LANCZOS)	sizeFactor= param[0] != SWS_PARAM_DEFAULT ? 2.0*param[0] : 6.0;

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

  1000. 		else if(flags&SWS_SPLINE)	sizeFactor= 20.0;  // infinite ;)

  1001. 		else if(flags&SWS_BILINEAR)	sizeFactor= 2.0;

  1002. 		else {

  1003. 			sizeFactor= 0.0; //GCC warning killer

  1004. 			ASSERT(0)

  1005. 		}

  1006. 		

  1007. 		if(xInc1 <= 1.0)	filterSizeInSrc= sizeFactor; // upscale

  1008. 		else			filterSizeInSrc= sizeFactor*srcW / (double)dstW;

  1009. 

  1010. 		filterSize= (int)ceil(1 + filterSizeInSrc); // will be reduced later if possible

  1011. 		if(filterSize > srcW-2) filterSize=srcW-2;

  1012. 

  1013. 		filter= av_malloc(dstW*sizeof(double)*filterSize);

  1014. 

  1015. 		xDstInSrc= xInc1 / 2.0 - 0.5;

  1016. 		for(i=0; i<dstW; i++)

  1017. 		{

  1018. 			int xx= (int)(xDstInSrc - (filterSize-1)*0.5 + 0.5);

  1019. 			int j;

  1020. 			(*filterPos)[i]= xx;

  1021. 			for(j=0; j<filterSize; j++)

  1022. 			{

  1023. 				double d= FFABS(xx - xDstInSrc)/filterSizeInSrc*sizeFactor;

  1024. 				double coeff;

  1025. 				if(flags & SWS_BICUBIC)

  1026. 				{

  1027. 					double B= param[0] != SWS_PARAM_DEFAULT ? param[0] : 0.0;

  1028. 					double C= param[1] != SWS_PARAM_DEFAULT ? param[1] : 0.6;

  1029. 

  1030. 					if(d<1.0) 

  1031. 						coeff = (12-9*B-6*C)*d*d*d + (-18+12*B+6*C)*d*d + 6-2*B;

  1032. 					else if(d<2.0)

  1033. 						coeff = (-B-6*C)*d*d*d + (6*B+30*C)*d*d + (-12*B-48*C)*d +8*B+24*C;

  1034. 					else

  1035. 						coeff=0.0;

  1036. 				}

  1037. /*				else if(flags & SWS_X)

  1038. 				{

  1039. 					double p= param ? param*0.01 : 0.3;

  1040. 					coeff = d ? sin(d*PI)/(d*PI) : 1.0;

  1041. 					coeff*= pow(2.0, - p*d*d);

  1042. 				}*/

  1043. 				else if(flags & SWS_X)

  1044. 				{

  1045. 					double A= param[0] != SWS_PARAM_DEFAULT ? param[0] : 1.0;

  1046. 					

  1047. 					if(d<1.0)

  1048. 						coeff = cos(d*PI);

  1049. 					else

  1050. 						coeff=-1.0;

  1051. 					if(coeff<0.0) 	coeff= -pow(-coeff, A);

  1052. 					else		coeff=  pow( coeff, A);

  1053. 					coeff= coeff*0.5 + 0.5;

  1054. 				}

  1055. 				else if(flags & SWS_AREA)

  1056. 				{

  1057. 					double srcPixelSize= 1.0/xInc1;

  1058. 					if(d + srcPixelSize/2 < 0.5) coeff= 1.0;

  1059. 					else if(d - srcPixelSize/2 < 0.5) coeff= (0.5-d)/srcPixelSize + 0.5;

  1060. 					else coeff=0.0;

  1061. 				}

  1062. 				else if(flags & SWS_GAUSS)

  1063. 				{

  1064. 					double p= param[0] != SWS_PARAM_DEFAULT ? param[0] : 3.0;

  1065. 					coeff = pow(2.0, - p*d*d);

  1066. 				}

  1067. 				else if(flags & SWS_SINC)

  1068. 				{

  1069. 					coeff = d ? sin(d*PI)/(d*PI) : 1.0;

  1070. 				}

  1071. 				else if(flags & SWS_LANCZOS)

  1072. 				{

  1073. 					double p= param[0] != SWS_PARAM_DEFAULT ? param[0] : 3.0; 

  1074. 					coeff = d ? sin(d*PI)*sin(d*PI/p)/(d*d*PI*PI/p) : 1.0;

  1075. 					if(d>p) coeff=0;

  1076. 				}

  1077. 				else if(flags & SWS_BILINEAR)

  1078. 				{

  1079. 					coeff= 1.0 - d;

  1080. 					if(coeff<0) coeff=0;

  1081. 				}

  1082. 				else if(flags & SWS_SPLINE)

  1083. 				{

  1084. 					double p=-2.196152422706632;

  1085. 					coeff = getSplineCoeff(1.0, 0.0, p, -p-1.0, d);

  1086. 				}

  1087. 				else {

  1088. 					coeff= 0.0; //GCC warning killer

  1089. 					ASSERT(0)

  1090. 				}

  1091. 

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

  1093. 				xx++;

  1094. 			}

  1095. 			xDstInSrc+= xInc1;

  1096. 		}

  1097. 	}

  1098. 

  1099. 	/* apply src & dst Filter to filter -> filter2

  1100. 	   av_free(filter);

  1101. 	*/

  1102. 	ASSERT(filterSize>0)

  1103. 	filter2Size= filterSize;

  1104. 	if(srcFilter) filter2Size+= srcFilter->length - 1;

  1105. 	if(dstFilter) filter2Size+= dstFilter->length - 1;

  1106. 	ASSERT(filter2Size>0)

  1107. 	filter2= av_malloc(filter2Size*dstW*sizeof(double));

  1108. 

  1109. 	for(i=0; i<dstW; i++)

  1110. 	{

  1111. 		int j;

  1112. 		SwsVector scaleFilter;

  1113. 		SwsVector *outVec;

  1114. 

  1115. 		scaleFilter.coeff= filter + i*filterSize;

  1116. 		scaleFilter.length= filterSize;

  1117. 

  1118. 		if(srcFilter) outVec= sws_getConvVec(srcFilter, &scaleFilter);

  1119. 		else	      outVec= &scaleFilter;

  1120. 

  1121. 		ASSERT(outVec->length == filter2Size)

  1122. 		//FIXME dstFilter

  1123. 

  1124. 		for(j=0; j<outVec->length; j++)

  1125. 		{

  1126. 			filter2[i*filter2Size + j]= outVec->coeff[j];

  1127. 		}

  1128. 

  1129. 		(*filterPos)[i]+= (filterSize-1)/2 - (filter2Size-1)/2;

  1130. 

  1131. 		if(outVec != &scaleFilter) sws_freeVec(outVec);

  1132. 	}

  1133. 	av_free(filter); filter=NULL;

  1134. 

  1135. 	/* try to reduce the filter-size (step1 find size and shift left) */

  1136. 	// Assume its near normalized (*0.5 or *2.0 is ok but * 0.001 is not)

  1137. 	minFilterSize= 0;

  1138. 	for(i=dstW-1; i>=0; i--)

  1139. 	{

  1140. 		int min= filter2Size;

  1141. 		int j;

  1142. 		double cutOff=0.0;

  1143. 

  1144. 		/* get rid off near zero elements on the left by shifting left */

  1145. 		for(j=0; j<filter2Size; j++)

  1146. 		{

  1147. 			int k;

  1148. 			cutOff += FFABS(filter2[i*filter2Size]);

  1149. 

  1150. 			if(cutOff > SWS_MAX_REDUCE_CUTOFF) break;

  1151. 

  1152. 			/* preserve Monotonicity because the core can't handle the filter otherwise */

  1153. 			if(i<dstW-1 && (*filterPos)[i] >= (*filterPos)[i+1]) break;

  1154. 

  1155. 			// Move filter coeffs left

  1156. 			for(k=1; k<filter2Size; k++)

  1157. 				filter2[i*filter2Size + k - 1]= filter2[i*filter2Size + k];

  1158. 			filter2[i*filter2Size + k - 1]= 0.0;

  1159. 			(*filterPos)[i]++;

  1160. 		}

  1161. 

  1162. 		cutOff=0.0;

  1163. 		/* count near zeros on the right */

  1164. 		for(j=filter2Size-1; j>0; j--)

  1165. 		{

  1166. 			cutOff += FFABS(filter2[i*filter2Size + j]);

  1167. 

  1168. 			if(cutOff > SWS_MAX_REDUCE_CUTOFF) break;

  1169. 			min--;

  1170. 		}

  1171. 

  1172. 		if(min>minFilterSize) minFilterSize= min;

  1173. 	}

  1174. 

  1175.         if (flags & SWS_CPU_CAPS_ALTIVEC) {

  1176.           // we can handle the special case 4,

  1177.           // so we don't want to go to the full 8

  1178.           if (minFilterSize < 5)

  1179.             filterAlign = 4;

  1180. 

  1181.           // we really don't want to waste our time

  1182.           // doing useless computation, so fall-back on

  1183.           // the scalar C code for very small filter.

  1184.           // vectorizing is worth it only if you have

  1185.           // decent-sized vector.

  1186.           if (minFilterSize < 3)

  1187.             filterAlign = 1;

  1188.         }

  1189. 

  1190.         if (flags & SWS_CPU_CAPS_MMX) {

  1191.                 // special case for unscaled vertical filtering

  1192.                 if(minFilterSize == 1 && filterAlign == 2)

  1193.                         filterAlign= 1;

  1194.         }

  1195. 

  1196. 	ASSERT(minFilterSize > 0)

  1197. 	filterSize= (minFilterSize +(filterAlign-1)) & (~(filterAlign-1));

  1198. 	ASSERT(filterSize > 0)

  1199. 	filter= av_malloc(filterSize*dstW*sizeof(double));

  1200.         if(filterSize >= MAX_FILTER_SIZE)

  1201.                 return -1;

  1202. 	*outFilterSize= filterSize;

  1203. 

  1204. 	if(flags&SWS_PRINT_INFO)

  1205. 		av_log(NULL, AV_LOG_VERBOSE, "SwScaler: reducing / aligning filtersize %d -> %d\n", filter2Size, filterSize);

  1206. 	/* try to reduce the filter-size (step2 reduce it) */

  1207. 	for(i=0; i<dstW; i++)

  1208. 	{

  1209. 		int j;

  1210. 

  1211. 		for(j=0; j<filterSize; j++)

  1212. 		{

  1213. 			if(j>=filter2Size) filter[i*filterSize + j]= 0.0;

  1214. 			else		   filter[i*filterSize + j]= filter2[i*filter2Size + j];

  1215. 		}

  1216. 	}

  1217. 	av_free(filter2); filter2=NULL;

  1218. 	

  1219. 

  1220. 	//FIXME try to align filterpos if possible

  1221. 

  1222. 	//fix borders

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

  1224. 	{

  1225. 		int j;

  1226. 		if((*filterPos)[i] < 0)

  1227. 		{

  1228. 			// Move filter coeffs left to compensate for filterPos

  1229. 			for(j=1; j<filterSize; j++)

  1230. 			{

  1231. 				int left= FFMAX(j + (*filterPos)[i], 0);

  1232. 				filter[i*filterSize + left] += filter[i*filterSize + j];

  1233. 				filter[i*filterSize + j]=0;

  1234. 			}

  1235. 			(*filterPos)[i]= 0;

  1236. 		}

  1237. 

  1238. 		if((*filterPos)[i] + filterSize > srcW)

  1239. 		{

  1240. 			int shift= (*filterPos)[i] + filterSize - srcW;

  1241. 			// Move filter coeffs right to compensate for filterPos

  1242. 			for(j=filterSize-2; j>=0; j--)

  1243. 			{

  1244. 				int right= FFMIN(j + shift, filterSize-1);

  1245. 				filter[i*filterSize +right] += filter[i*filterSize +j];

  1246. 				filter[i*filterSize +j]=0;

  1247. 			}

  1248. 			(*filterPos)[i]= srcW - filterSize;

  1249. 		}

  1250. 	}

  1251. 

  1252. 	// Note the +1 is for the MMXscaler which reads over the end

  1253. 	/* align at 16 for AltiVec (needed by hScale_altivec_real) */

  1254. 	*outFilter= av_mallocz(*outFilterSize*(dstW+1)*sizeof(int16_t));

  1255. 

  1256. 	/* Normalize & Store in outFilter */

  1257. 	for(i=0; i<dstW; i++)

  1258. 	{

  1259. 		int j;

  1260. 		double error=0;

  1261. 		double sum=0;

  1262. 		double scale= one;

  1263. 

  1264. 		for(j=0; j<filterSize; j++)

  1265. 		{

  1266. 			sum+= filter[i*filterSize + j];

  1267. 		}

  1268. 		scale/= sum;

  1269. 		for(j=0; j<*outFilterSize; j++)

  1270. 		{

  1271. 			double v= filter[i*filterSize + j]*scale + error;

  1272. 			int intV= floor(v + 0.5);

  1273. 			(*outFilter)[i*(*outFilterSize) + j]= intV;

  1274. 			error = v - intV;

  1275. 		}

  1276. 	}

  1277. 	

  1278. 	(*filterPos)[dstW]= (*filterPos)[dstW-1]; // the MMX scaler will read over the end

  1279. 	for(i=0; i<*outFilterSize; i++)

  1280. 	{

  1281. 		int j= dstW*(*outFilterSize);

  1282. 		(*outFilter)[j + i]= (*outFilter)[j + i - (*outFilterSize)];

  1283. 	}

  1284. 

  1285. 	av_free(filter);

  1286.         return 0;

  1287. }

  1288. 

  1289. #ifdef COMPILE_MMX2

  1290. static void initMMX2HScaler(int dstW, int xInc, uint8_t *funnyCode, int16_t *filter, int32_t *filterPos, int numSplits)

  1291. {

  1292. 	uint8_t *fragmentA;

  1293. 	long imm8OfPShufW1A;

  1294. 	long imm8OfPShufW2A;

  1295. 	long fragmentLengthA;

  1296. 	uint8_t *fragmentB;

  1297. 	long imm8OfPShufW1B;

  1298. 	long imm8OfPShufW2B;

  1299. 	long fragmentLengthB;

  1300. 	int fragmentPos;

  1301. 

  1302. 	int xpos, i;

  1303. 

  1304. 	// create an optimized horizontal scaling routine

  1305. 

  1306. 	//code fragment

  1307. 

  1308. 	asm volatile(

  1309. 		"jmp 9f				\n\t"

  1310. 	// Begin

  1311. 		"0:				\n\t"

  1312. 		"movq (%%"REG_d", %%"REG_a"), %%mm3\n\t" 

  1313. 		"movd (%%"REG_c", %%"REG_S"), %%mm0\n\t" 

  1314. 		"movd 1(%%"REG_c", %%"REG_S"), %%mm1\n\t"

  1315. 		"punpcklbw %%mm7, %%mm1		\n\t"

  1316. 		"punpcklbw %%mm7, %%mm0		\n\t"

  1317. 		"pshufw $0xFF, %%mm1, %%mm1	\n\t"

  1318. 		"1:				\n\t"

  1319. 		"pshufw $0xFF, %%mm0, %%mm0	\n\t"

  1320. 		"2:				\n\t"

  1321. 		"psubw %%mm1, %%mm0		\n\t"

  1322. 		"movl 8(%%"REG_b", %%"REG_a"), %%esi\n\t"

  1323. 		"pmullw %%mm3, %%mm0		\n\t"

  1324. 		"psllw $7, %%mm1		\n\t"

  1325. 		"paddw %%mm1, %%mm0		\n\t"

  1326. 

  1327. 		"movq %%mm0, (%%"REG_D", %%"REG_a")\n\t"

  1328. 

  1329. 		"add $8, %%"REG_a"		\n\t"

  1330. 	// End

  1331. 		"9:				\n\t"

  1332. //		"int $3\n\t"

  1333. 		"lea 0b, %0			\n\t"

  1334. 		"lea 1b, %1			\n\t"

  1335. 		"lea 2b, %2			\n\t"

  1336. 		"dec %1				\n\t"

  1337. 		"dec %2				\n\t"

  1338. 		"sub %0, %1			\n\t"

  1339. 		"sub %0, %2			\n\t"

  1340. 		"lea 9b, %3			\n\t"

  1341. 		"sub %0, %3			\n\t"

  1342. 

  1343. 

  1344. 		:"=r" (fragmentA), "=r" (imm8OfPShufW1A), "=r" (imm8OfPShufW2A),

  1345. 		"=r" (fragmentLengthA)

  1346. 	);

  1347. 

  1348. 	asm volatile(

  1349. 		"jmp 9f				\n\t"

  1350. 	// Begin

  1351. 		"0:				\n\t"

  1352. 		"movq (%%"REG_d", %%"REG_a"), %%mm3\n\t" 

  1353. 		"movd (%%"REG_c", %%"REG_S"), %%mm0\n\t" 

  1354. 		"punpcklbw %%mm7, %%mm0		\n\t"

  1355. 		"pshufw $0xFF, %%mm0, %%mm1	\n\t"

  1356. 		"1:				\n\t"

  1357. 		"pshufw $0xFF, %%mm0, %%mm0	\n\t"

  1358. 		"2:				\n\t"

  1359. 		"psubw %%mm1, %%mm0		\n\t"

  1360. 		"movl 8(%%"REG_b", %%"REG_a"), %%esi\n\t"

  1361. 		"pmullw %%mm3, %%mm0		\n\t"

  1362. 		"psllw $7, %%mm1		\n\t"

  1363. 		"paddw %%mm1, %%mm0		\n\t"

  1364. 

  1365. 		"movq %%mm0, (%%"REG_D", %%"REG_a")\n\t"

  1366. 

  1367. 		"add $8, %%"REG_a"		\n\t"

  1368. 	// End

  1369. 		"9:				\n\t"

  1370. //		"int $3\n\t"

  1371. 		"lea 0b, %0			\n\t"

  1372. 		"lea 1b, %1			\n\t"

  1373. 		"lea 2b, %2			\n\t"

  1374. 		"dec %1				\n\t"

  1375. 		"dec %2				\n\t"

  1376. 		"sub %0, %1			\n\t"

  1377. 		"sub %0, %2			\n\t"

  1378. 		"lea 9b, %3			\n\t"

  1379. 		"sub %0, %3			\n\t"

  1380. 

  1381. 

  1382. 		:"=r" (fragmentB), "=r" (imm8OfPShufW1B), "=r" (imm8OfPShufW2B),

  1383. 		"=r" (fragmentLengthB)

  1384. 	);

  1385. 

  1386. 	xpos= 0; //lumXInc/2 - 0x8000; // difference between pixel centers

  1387. 	fragmentPos=0;

  1388. 	

  1389. 	for(i=0; i<dstW/numSplits; i++)

  1390. 	{

  1391. 		int xx=xpos>>16;

  1392. 

  1393. 		if((i&3) == 0)

  1394. 		{

  1395. 			int a=0;

  1396. 			int b=((xpos+xInc)>>16) - xx;

  1397. 			int c=((xpos+xInc*2)>>16) - xx;

  1398. 			int d=((xpos+xInc*3)>>16) - xx;

  1399. 

  1400. 			filter[i  ] = (( xpos         & 0xFFFF) ^ 0xFFFF)>>9;

  1401. 			filter[i+1] = (((xpos+xInc  ) & 0xFFFF) ^ 0xFFFF)>>9;

  1402. 			filter[i+2] = (((xpos+xInc*2) & 0xFFFF) ^ 0xFFFF)>>9;

  1403. 			filter[i+3] = (((xpos+xInc*3) & 0xFFFF) ^ 0xFFFF)>>9;

  1404. 			filterPos[i/2]= xx;

  1405. 

  1406. 			if(d+1<4)

  1407. 			{

  1408. 				int maxShift= 3-(d+1);

  1409. 				int shift=0;

  1410. 

  1411. 				memcpy(funnyCode + fragmentPos, fragmentB, fragmentLengthB);

  1412. 

  1413. 				funnyCode[fragmentPos + imm8OfPShufW1B]=

  1414. 					(a+1) | ((b+1)<<2) | ((c+1)<<4) | ((d+1)<<6);

  1415. 				funnyCode[fragmentPos + imm8OfPShufW2B]=

  1416. 					a | (b<<2) | (c<<4) | (d<<6);

  1417. 

  1418. 				if(i+3>=dstW) shift=maxShift; //avoid overread

  1419. 				else if((filterPos[i/2]&3) <= maxShift) shift=filterPos[i/2]&3; //Align

  1420. 

  1421. 				if(shift && i>=shift)

  1422. 				{

  1423. 					funnyCode[fragmentPos + imm8OfPShufW1B]+= 0x55*shift;

  1424. 					funnyCode[fragmentPos + imm8OfPShufW2B]+= 0x55*shift;

  1425. 					filterPos[i/2]-=shift;

  1426. 				}

  1427. 

  1428. 				fragmentPos+= fragmentLengthB;

  1429. 			}

  1430. 			else

  1431. 			{

  1432. 				int maxShift= 3-d;

  1433. 				int shift=0;

  1434. 

  1435. 				memcpy(funnyCode + fragmentPos, fragmentA, fragmentLengthA);

  1436. 

  1437. 				funnyCode[fragmentPos + imm8OfPShufW1A]=

  1438. 				funnyCode[fragmentPos + imm8OfPShufW2A]=

  1439. 					a | (b<<2) | (c<<4) | (d<<6);

  1440. 

  1441. 				if(i+4>=dstW) shift=maxShift; //avoid overread

  1442. 				else if((filterPos[i/2]&3) <= maxShift) shift=filterPos[i/2]&3; //partial align

  1443. 

  1444. 				if(shift && i>=shift)

  1445. 				{

  1446. 					funnyCode[fragmentPos + imm8OfPShufW1A]+= 0x55*shift;

  1447. 					funnyCode[fragmentPos + imm8OfPShufW2A]+= 0x55*shift;

  1448. 					filterPos[i/2]-=shift;

  1449. 				}

  1450. 

  1451. 				fragmentPos+= fragmentLengthA;

  1452. 			}

  1453. 

  1454. 			funnyCode[fragmentPos]= RET;

  1455. 		}

  1456. 		xpos+=xInc;

  1457. 	}

  1458. 	filterPos[i/2]= xpos>>16; // needed to jump to the next part

  1459. }

  1460. #endif /* COMPILE_MMX2 */

  1461. 

  1462. static void globalInit(void){

  1463.     // generating tables:

  1464.     int i;

  1465.     for(i=0; i<768; i++){

  1466. 	int c= clip_uint8(i-256);

  1467. 	clip_table[i]=c;

  1468.     }

  1469. }

  1470. 

  1471. static SwsFunc getSwsFunc(int flags){

  1472.     

  1473. #if defined(RUNTIME_CPUDETECT) && defined (CONFIG_GPL)

  1474. #if defined(ARCH_X86)

  1475. 	// ordered per speed fasterst first

  1476. 	if(flags & SWS_CPU_CAPS_MMX2)

  1477. 		return swScale_MMX2;

  1478. 	else if(flags & SWS_CPU_CAPS_3DNOW)

  1479. 		return swScale_3DNow;

  1480. 	else if(flags & SWS_CPU_CAPS_MMX)

  1481. 		return swScale_MMX;

  1482. 	else

  1483. 		return swScale_C;

  1484. 

  1485. #else

  1486. #ifdef ARCH_POWERPC

  1487. 	if(flags & SWS_CPU_CAPS_ALTIVEC)

  1488. 	  return swScale_altivec;

  1489. 	else

  1490. 	  return swScale_C;

  1491. #endif

  1492. 	return swScale_C;

  1493. #endif /* defined(ARCH_X86) */

  1494. #else //RUNTIME_CPUDETECT

  1495. #ifdef HAVE_MMX2

  1496. 	return swScale_MMX2;

  1497. #elif defined (HAVE_3DNOW)

  1498. 	return swScale_3DNow;

  1499. #elif defined (HAVE_MMX)

  1500. 	return swScale_MMX;

  1501. #elif defined (HAVE_ALTIVEC)

  1502. 	return swScale_altivec;

  1503. #else

  1504. 	return swScale_C;

  1505. #endif

  1506. #endif //!RUNTIME_CPUDETECT

  1507. }

  1508. 

  1509. static int PlanarToNV12Wrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1510.              int srcSliceH, uint8_t* dstParam[], int dstStride[]){

  1511. 	uint8_t *dst=dstParam[0] + dstStride[0]*srcSliceY;

  1512. 	/* Copy Y plane */

  1513. 	if(dstStride[0]==srcStride[0] && srcStride[0] > 0)

  1514. 		memcpy(dst, src[0], srcSliceH*dstStride[0]);

  1515. 	else

  1516. 	{

  1517. 		int i;

  1518. 		uint8_t *srcPtr= src[0];

  1519. 		uint8_t *dstPtr= dst;

  1520. 		for(i=0; i<srcSliceH; i++)

  1521. 		{

  1522. 			memcpy(dstPtr, srcPtr, c->srcW);

  1523. 			srcPtr+= srcStride[0];

  1524. 			dstPtr+= dstStride[0];

  1525. 		}

  1526. 	}

  1527. 	dst = dstParam[1] + dstStride[1]*srcSliceY/2;

  1528. 	if (c->dstFormat == PIX_FMT_NV12)

  1529. 		interleaveBytes( src[1],src[2],dst,c->srcW/2,srcSliceH/2,srcStride[1],srcStride[2],dstStride[0] );

  1530. 	else

  1531. 		interleaveBytes( src[2],src[1],dst,c->srcW/2,srcSliceH/2,srcStride[2],srcStride[1],dstStride[0] );

  1532. 

  1533. 	return srcSliceH;

  1534. }

  1535. 

  1536. static int PlanarToYuy2Wrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1537.              int srcSliceH, uint8_t* dstParam[], int dstStride[]){

  1538. 	uint8_t *dst=dstParam[0] + dstStride[0]*srcSliceY;

  1539. 

  1540. 	yv12toyuy2( src[0],src[1],src[2],dst,c->srcW,srcSliceH,srcStride[0],srcStride[1],dstStride[0] );

  1541. 

  1542. 	return srcSliceH;

  1543. }

  1544. 

  1545. static int PlanarToUyvyWrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1546.              int srcSliceH, uint8_t* dstParam[], int dstStride[]){

  1547. 	uint8_t *dst=dstParam[0] + dstStride[0]*srcSliceY;

  1548. 

  1549. 	yv12touyvy( src[0],src[1],src[2],dst,c->srcW,srcSliceH,srcStride[0],srcStride[1],dstStride[0] );

  1550. 

  1551. 	return srcSliceH;

  1552. }

  1553. 

  1554. /* {RGB,BGR}{15,16,24,32} -> {RGB,BGR}{15,16,24,32} */

  1555. static int rgb2rgbWrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1556. 			   int srcSliceH, uint8_t* dst[], int dstStride[]){

  1557. 	const int srcFormat= c->srcFormat;

  1558. 	const int dstFormat= c->dstFormat;

  1559. 	const int srcBpp= (fmt_depth(srcFormat) + 7) >> 3;

  1560. 	const int dstBpp= (fmt_depth(dstFormat) + 7) >> 3;

  1561. 	const int srcId= fmt_depth(srcFormat) >> 2; /* 1:0, 4:1, 8:2, 15:3, 16:4, 24:6, 32:8 */

  1562. 	const int dstId= fmt_depth(dstFormat) >> 2;

  1563. 	void (*conv)(const uint8_t *src, uint8_t *dst, long src_size)=NULL;

  1564. 

  1565. 	/* BGR -> BGR */

  1566. 	if(   (isBGR(srcFormat) && isBGR(dstFormat))

  1567. 	   || (isRGB(srcFormat) && isRGB(dstFormat))){

  1568. 		switch(srcId | (dstId<<4)){

  1569. 		case 0x34: conv= rgb16to15; break;

  1570. 		case 0x36: conv= rgb24to15; break;

  1571. 		case 0x38: conv= rgb32to15; break;

  1572. 		case 0x43: conv= rgb15to16; break;

  1573. 		case 0x46: conv= rgb24to16; break;

  1574. 		case 0x48: conv= rgb32to16; break;

  1575. 		case 0x63: conv= rgb15to24; break;

  1576. 		case 0x64: conv= rgb16to24; break;

  1577. 		case 0x68: conv= rgb32to24; break;

  1578. 		case 0x83: conv= rgb15to32; break;

  1579. 		case 0x84: conv= rgb16to32; break;

  1580. 		case 0x86: conv= rgb24to32; break;

  1581. 		default: av_log(c, AV_LOG_ERROR, "swScaler: internal error %s -> %s converter\n", 

  1582. 				 sws_format_name(srcFormat), sws_format_name(dstFormat)); break;

  1583. 		}

  1584. 	}else if(   (isBGR(srcFormat) && isRGB(dstFormat))

  1585. 		 || (isRGB(srcFormat) && isBGR(dstFormat))){

  1586. 		switch(srcId | (dstId<<4)){

  1587. 		case 0x33: conv= rgb15tobgr15; break;

  1588. 		case 0x34: conv= rgb16tobgr15; break;

  1589. 		case 0x36: conv= rgb24tobgr15; break;

  1590. 		case 0x38: conv= rgb32tobgr15; break;

  1591. 		case 0x43: conv= rgb15tobgr16; break;

  1592. 		case 0x44: conv= rgb16tobgr16; break;

  1593. 		case 0x46: conv= rgb24tobgr16; break;

  1594. 		case 0x48: conv= rgb32tobgr16; break;

  1595. 		case 0x63: conv= rgb15tobgr24; break;

  1596. 		case 0x64: conv= rgb16tobgr24; break;

  1597. 		case 0x66: conv= rgb24tobgr24; break;

  1598. 		case 0x68: conv= rgb32tobgr24; break;

  1599. 		case 0x83: conv= rgb15tobgr32; break;

  1600. 		case 0x84: conv= rgb16tobgr32; break;

  1601. 		case 0x86: conv= rgb24tobgr32; break;

  1602. 		case 0x88: conv= rgb32tobgr32; break;

  1603. 		default: av_log(c, AV_LOG_ERROR, "swScaler: internal error %s -> %s converter\n", 

  1604. 				 sws_format_name(srcFormat), sws_format_name(dstFormat)); break;

  1605. 		}

  1606. 	}else{

  1607. 		av_log(c, AV_LOG_ERROR, "swScaler: internal error %s -> %s converter\n", 

  1608. 			 sws_format_name(srcFormat), sws_format_name(dstFormat));

  1609. 	}

  1610. 

  1611. 	if(dstStride[0]*srcBpp == srcStride[0]*dstBpp)

  1612. 		conv(src[0], dst[0] + dstStride[0]*srcSliceY, srcSliceH*srcStride[0]);

  1613. 	else

  1614. 	{

  1615. 		int i;

  1616. 		uint8_t *srcPtr= src[0];

  1617. 		uint8_t *dstPtr= dst[0] + dstStride[0]*srcSliceY;

  1618. 

  1619. 		for(i=0; i<srcSliceH; i++)

  1620. 		{

  1621. 			conv(srcPtr, dstPtr, c->srcW*srcBpp);

  1622. 			srcPtr+= srcStride[0];

  1623. 			dstPtr+= dstStride[0];

  1624. 		}

  1625. 	}     

  1626. 	return srcSliceH;

  1627. }

  1628. 

  1629. static int bgr24toyv12Wrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1630.              int srcSliceH, uint8_t* dst[], int dstStride[]){

  1631. 

  1632. 	rgb24toyv12(

  1633. 		src[0], 

  1634. 		dst[0]+ srcSliceY    *dstStride[0], 

  1635. 		dst[1]+(srcSliceY>>1)*dstStride[1], 

  1636. 		dst[2]+(srcSliceY>>1)*dstStride[2],

  1637. 		c->srcW, srcSliceH, 

  1638. 		dstStride[0], dstStride[1], srcStride[0]);

  1639. 	return srcSliceH;

  1640. }

  1641. 

  1642. static int yvu9toyv12Wrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1643.              int srcSliceH, uint8_t* dst[], int dstStride[]){

  1644. 	int i;

  1645. 

  1646. 	/* copy Y */

  1647. 	if(srcStride[0]==dstStride[0] && srcStride[0] > 0) 

  1648. 		memcpy(dst[0]+ srcSliceY*dstStride[0], src[0], srcStride[0]*srcSliceH);

  1649. 	else{

  1650. 		uint8_t *srcPtr= src[0];

  1651. 		uint8_t *dstPtr= dst[0] + dstStride[0]*srcSliceY;

  1652. 

  1653. 		for(i=0; i<srcSliceH; i++)

  1654. 		{

  1655. 			memcpy(dstPtr, srcPtr, c->srcW);

  1656. 			srcPtr+= srcStride[0];

  1657. 			dstPtr+= dstStride[0];

  1658. 		}

  1659. 	}

  1660. 

  1661. 	if(c->dstFormat==PIX_FMT_YUV420P){

  1662. 		planar2x(src[1], dst[1], c->chrSrcW, c->chrSrcH, srcStride[1], dstStride[1]);

  1663. 		planar2x(src[2], dst[2], c->chrSrcW, c->chrSrcH, srcStride[2], dstStride[2]);

  1664. 	}else{

  1665. 		planar2x(src[1], dst[2], c->chrSrcW, c->chrSrcH, srcStride[1], dstStride[2]);

  1666. 		planar2x(src[2], dst[1], c->chrSrcW, c->chrSrcH, srcStride[2], dstStride[1]);

  1667. 	}

  1668. 	return srcSliceH;

  1669. }

  1670. 

  1671. /* unscaled copy like stuff (assumes nearly identical formats) */

  1672. static int simpleCopy(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1673.              int srcSliceH, uint8_t* dst[], int dstStride[]){

  1674. 

  1675. 	if(isPacked(c->srcFormat))

  1676. 	{

  1677. 		if(dstStride[0]==srcStride[0] && srcStride[0] > 0)

  1678. 			memcpy(dst[0] + dstStride[0]*srcSliceY, src[0], srcSliceH*dstStride[0]);

  1679. 		else

  1680. 		{

  1681. 			int i;

  1682. 			uint8_t *srcPtr= src[0];

  1683. 			uint8_t *dstPtr= dst[0] + dstStride[0]*srcSliceY;

  1684. 			int length=0;

  1685. 

  1686. 			/* universal length finder */

  1687. 			while(length+c->srcW <= FFABS(dstStride[0]) 

  1688. 			   && length+c->srcW <= FFABS(srcStride[0])) length+= c->srcW;

  1689. 			ASSERT(length!=0);

  1690. 

  1691. 			for(i=0; i<srcSliceH; i++)

  1692. 			{

  1693. 				memcpy(dstPtr, srcPtr, length);

  1694. 				srcPtr+= srcStride[0];

  1695. 				dstPtr+= dstStride[0];

  1696. 			}

  1697. 		}

  1698. 	}

  1699. 	else 

  1700. 	{ /* Planar YUV or gray */

  1701. 		int plane;

  1702. 		for(plane=0; plane<3; plane++)

  1703. 		{

  1704. 			int length= plane==0 ? c->srcW  : -((-c->srcW  )>>c->chrDstHSubSample);

  1705. 			int y=      plane==0 ? srcSliceY: -((-srcSliceY)>>c->chrDstVSubSample);

  1706. 			int height= plane==0 ? srcSliceH: -((-srcSliceH)>>c->chrDstVSubSample);

  1707. 

  1708. 			if((isGray(c->srcFormat) || isGray(c->dstFormat)) && plane>0)

  1709. 			{

  1710. 				if(!isGray(c->dstFormat))

  1711. 					memset(dst[plane], 128, dstStride[plane]*height);

  1712. 			}

  1713. 			else

  1714. 			{

  1715. 				if(dstStride[plane]==srcStride[plane] && srcStride[plane] > 0)

  1716. 					memcpy(dst[plane] + dstStride[plane]*y, src[plane], height*dstStride[plane]);

  1717. 				else

  1718. 				{

  1719. 					int i;

  1720. 					uint8_t *srcPtr= src[plane];

  1721. 					uint8_t *dstPtr= dst[plane] + dstStride[plane]*y;

  1722. 					for(i=0; i<height; i++)

  1723. 					{

  1724. 						memcpy(dstPtr, srcPtr, length);

  1725. 						srcPtr+= srcStride[plane];

  1726. 						dstPtr+= dstStride[plane];

  1727. 					}

  1728. 				}

  1729. 			}

  1730. 		}

  1731. 	}

  1732. 	return srcSliceH;

  1733. }

  1734. 

  1735. static int gray16togray(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1736.              int srcSliceH, uint8_t* dst[], int dstStride[]){

  1737. 

  1738. 	int length= c->srcW;

  1739. 	int y=      srcSliceY;

  1740. 	int height= srcSliceH;

  1741. 	int i, j;

  1742. 	uint8_t *srcPtr= src[0];

  1743. 	uint8_t *dstPtr= dst[0] + dstStride[0]*y;

  1744. 

  1745. 	if(!isGray(c->dstFormat)){

  1746. 		int height= -((-srcSliceH)>>c->chrDstVSubSample);

  1747. 		memset(dst[1], 128, dstStride[1]*height);

  1748. 		memset(dst[2], 128, dstStride[2]*height);

  1749. 	}

  1750. 	if(c->srcFormat == PIX_FMT_GRAY16LE) srcPtr++;

  1751. 	for(i=0; i<height; i++)

  1752. 	{

  1753. 		for(j=0; j<length; j++) dstPtr[j] = srcPtr[j<<1];

  1754. 		srcPtr+= srcStride[0];

  1755. 		dstPtr+= dstStride[0];

  1756. 	}

  1757. 	return srcSliceH;

  1758. }

  1759. 

  1760. static int graytogray16(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1761.              int srcSliceH, uint8_t* dst[], int dstStride[]){

  1762. 

  1763. 	int length= c->srcW;

  1764. 	int y=      srcSliceY;

  1765. 	int height= srcSliceH;

  1766. 	int i, j;

  1767. 	uint8_t *srcPtr= src[0];

  1768. 	uint8_t *dstPtr= dst[0] + dstStride[0]*y;

  1769. 	for(i=0; i<height; i++)

  1770. 	{

  1771. 		for(j=0; j<length; j++)

  1772. 		{

  1773. 			dstPtr[j<<1] = srcPtr[j];

  1774. 			dstPtr[(j<<1)+1] = srcPtr[j];

  1775. 		}

  1776. 		srcPtr+= srcStride[0];

  1777. 		dstPtr+= dstStride[0];

  1778. 	}

  1779. 	return srcSliceH;

  1780. }

  1781. 

  1782. static int gray16swap(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1783.              int srcSliceH, uint8_t* dst[], int dstStride[]){

  1784. 

  1785. 	int length= c->srcW;

  1786. 	int y=      srcSliceY;

  1787. 	int height= srcSliceH;

  1788. 	int i, j;

  1789. 	uint16_t *srcPtr= src[0];

  1790. 	uint16_t *dstPtr= dst[0] + dstStride[0]*y/2;

  1791. 	for(i=0; i<height; i++)

  1792. 	{

  1793. 		for(j=0; j<length; j++) dstPtr[j] = bswap_16(srcPtr[j]);

  1794. 		srcPtr+= srcStride[0]/2;

  1795. 		dstPtr+= dstStride[0]/2;

  1796. 	}

  1797. 	return srcSliceH;

  1798. }

  1799. 

  1800. 

  1801. static void getSubSampleFactors(int *h, int *v, int format){

  1802. 	switch(format){

  1803. 	case PIX_FMT_UYVY422:

  1804. 	case PIX_FMT_YUYV422:

  1805. 		*h=1;

  1806. 		*v=0;

  1807. 		break;

  1808. 	case PIX_FMT_YUV420P:

  1809. 	case PIX_FMT_GRAY16BE:

  1810. 	case PIX_FMT_GRAY16LE:

  1811. 	case PIX_FMT_GRAY8: //FIXME remove after different subsamplings are fully implemented

  1812. 	case PIX_FMT_NV12:

  1813. 	case PIX_FMT_NV21:

  1814. 		*h=1;

  1815. 		*v=1;

  1816. 		break;

  1817. 	case PIX_FMT_YUV410P:

  1818. 		*h=2;

  1819. 		*v=2;

  1820. 		break;

  1821. 	case PIX_FMT_YUV444P:

  1822. 		*h=0;

  1823. 		*v=0;

  1824. 		break;

  1825. 	case PIX_FMT_YUV422P:

  1826. 		*h=1;

  1827. 		*v=0;

  1828. 		break;

  1829. 	case PIX_FMT_YUV411P:

  1830. 		*h=2;

  1831. 		*v=0;

  1832. 		break;

  1833. 	default:

  1834. 		*h=0;

  1835. 		*v=0;

  1836. 		break;

  1837. 	}

  1838. }

  1839. 

  1840. static uint16_t roundToInt16(int64_t f){

  1841. 	int r= (f + (1<<15))>>16;

  1842. 	     if(r<-0x7FFF) return 0x8000;

  1843. 	else if(r> 0x7FFF) return 0x7FFF;

  1844. 	else               return r;

  1845. }

  1846. 

  1847. /**

  1848.  * @param inv_table the yuv2rgb coeffs, normally Inverse_Table_6_9[x]

  1849.  * @param fullRange if 1 then the luma range is 0..255 if 0 its 16..235

  1850.  * @return -1 if not supported

  1851.  */

  1852. int sws_setColorspaceDetails(SwsContext *c, const int inv_table[4], int srcRange, const int table[4], int dstRange, int brightness, int contrast, int saturation){

  1853. 	int64_t crv =  inv_table[0];

  1854. 	int64_t cbu =  inv_table[1];

  1855. 	int64_t cgu = -inv_table[2];

  1856. 	int64_t cgv = -inv_table[3];

  1857. 	int64_t cy  = 1<<16;

  1858. 	int64_t oy  = 0;

  1859. 

  1860. 	if(isYUV(c->dstFormat) || isGray(c->dstFormat)) return -1;

  1861. 	memcpy(c->srcColorspaceTable, inv_table, sizeof(int)*4);

  1862. 	memcpy(c->dstColorspaceTable,     table, sizeof(int)*4);

  1863. 

  1864. 	c->brightness= brightness;

  1865. 	c->contrast  = contrast;

  1866. 	c->saturation= saturation;

  1867. 	c->srcRange  = srcRange;

  1868. 	c->dstRange  = dstRange;

  1869. 

  1870. 	c->uOffset=   0x0400040004000400LL;

  1871. 	c->vOffset=   0x0400040004000400LL;

  1872. 

  1873. 	if(!srcRange){

  1874. 		cy= (cy*255) / 219;

  1875. 		oy= 16<<16;

  1876. 	}

  1877. 

  1878. 	cy = (cy *contrast             )>>16;

  1879. 	crv= (crv*contrast * saturation)>>32;

  1880. 	cbu= (cbu*contrast * saturation)>>32;

  1881. 	cgu= (cgu*contrast * saturation)>>32;

  1882. 	cgv= (cgv*contrast * saturation)>>32;

  1883. 

  1884. 	oy -= 256*brightness;

  1885. 

  1886. 	c->yCoeff=    roundToInt16(cy *8192) * 0x0001000100010001ULL;

  1887. 	c->vrCoeff=   roundToInt16(crv*8192) * 0x0001000100010001ULL;

  1888. 	c->ubCoeff=   roundToInt16(cbu*8192) * 0x0001000100010001ULL;

  1889. 	c->vgCoeff=   roundToInt16(cgv*8192) * 0x0001000100010001ULL;

  1890. 	c->ugCoeff=   roundToInt16(cgu*8192) * 0x0001000100010001ULL;

  1891. 	c->yOffset=   roundToInt16(oy *   8) * 0x0001000100010001ULL;

  1892. 

  1893. 	yuv2rgb_c_init_tables(c, inv_table, srcRange, brightness, contrast, saturation);

  1894. 	//FIXME factorize

  1895. 

  1896. #ifdef COMPILE_ALTIVEC

  1897. 	if (c->flags & SWS_CPU_CAPS_ALTIVEC)

  1898. 	    yuv2rgb_altivec_init_tables (c, inv_table, brightness, contrast, saturation);

  1899. #endif	

  1900. 	return 0;

  1901. }

  1902. 

  1903. /**

  1904.  * @return -1 if not supported

  1905.  */

  1906. int sws_getColorspaceDetails(SwsContext *c, int **inv_table, int *srcRange, int **table, int *dstRange, int *brightness, int *contrast, int *saturation){

  1907. 	if(isYUV(c->dstFormat) || isGray(c->dstFormat)) return -1;

  1908. 

  1909. 	*inv_table = c->srcColorspaceTable;

  1910. 	*table     = c->dstColorspaceTable;

  1911. 	*srcRange  = c->srcRange;

  1912. 	*dstRange  = c->dstRange;

  1913. 	*brightness= c->brightness;

  1914. 	*contrast  = c->contrast;

  1915. 	*saturation= c->saturation;

  1916. 	

  1917. 	return 0;	

  1918. }

  1919. 

  1920. static int handle_jpeg(int *format)

  1921. {

  1922. 	switch (*format) {

  1923. 		case PIX_FMT_YUVJ420P:

  1924. 			*format = PIX_FMT_YUV420P;

  1925. 			return 1;

  1926. 		case PIX_FMT_YUVJ422P:

  1927. 			*format = PIX_FMT_YUV422P;

  1928. 			return 1;

  1929. 		case PIX_FMT_YUVJ444P:

  1930. 			*format = PIX_FMT_YUV444P;

  1931. 			return 1;

  1932. 		default:

  1933. 			return 0;

  1934. 	}

  1935. }

  1936. 

  1937. SwsContext *sws_getContext(int srcW, int srcH, int srcFormat, int dstW, int dstH, int dstFormat, int flags,

  1938.                          SwsFilter *srcFilter, SwsFilter *dstFilter, double *param){

  1939. 

  1940. 	SwsContext *c;

  1941. 	int i;

  1942. 	int usesVFilter, usesHFilter;

  1943. 	int unscaled, needsDither;

  1944. 	int srcRange, dstRange;

  1945. 	SwsFilter dummyFilter= {NULL, NULL, NULL, NULL};

  1946. #if defined(ARCH_X86)

  1947. 	if(flags & SWS_CPU_CAPS_MMX)

  1948. 		asm volatile("emms\n\t"::: "memory");

  1949. #endif

  1950. 

  1951. #if !defined(RUNTIME_CPUDETECT) || !defined (CONFIG_GPL) //ensure that the flags match the compiled variant if cpudetect is off

  1952. 	flags &= ~(SWS_CPU_CAPS_MMX|SWS_CPU_CAPS_MMX2|SWS_CPU_CAPS_3DNOW|SWS_CPU_CAPS_ALTIVEC);

  1953. #ifdef HAVE_MMX2

  1954. 	flags |= SWS_CPU_CAPS_MMX|SWS_CPU_CAPS_MMX2;

  1955. #elif defined (HAVE_3DNOW)

  1956. 	flags |= SWS_CPU_CAPS_MMX|SWS_CPU_CAPS_3DNOW;

  1957. #elif defined (HAVE_MMX)

  1958. 	flags |= SWS_CPU_CAPS_MMX;

  1959. #elif defined (HAVE_ALTIVEC)

  1960. 	flags |= SWS_CPU_CAPS_ALTIVEC;

  1961. #endif

  1962. #endif /* RUNTIME_CPUDETECT */

  1963. 	if(clip_table[512] != 255) globalInit();

  1964. 	if(rgb15to16 == NULL) sws_rgb2rgb_init(flags);

  1965. 

  1966. 	unscaled = (srcW == dstW && srcH == dstH);

  1967. 	needsDither= (isBGR(dstFormat) || isRGB(dstFormat)) 

  1968. 		     && (fmt_depth(dstFormat))<24

  1969. 		     && ((fmt_depth(dstFormat))<(fmt_depth(srcFormat)) || (!(isRGB(srcFormat) || isBGR(srcFormat))));

  1970. 

  1971. 	srcRange = handle_jpeg(&srcFormat);

  1972. 	dstRange = handle_jpeg(&dstFormat);

  1973. 

  1974. 	if(!isSupportedIn(srcFormat)) 

  1975. 	{

  1976. 		av_log(NULL, AV_LOG_ERROR, "swScaler: %s is not supported as input format\n", sws_format_name(srcFormat));

  1977. 		return NULL;

  1978. 	}

  1979. 	if(!isSupportedOut(dstFormat))

  1980. 	{

  1981. 		av_log(NULL, AV_LOG_ERROR, "swScaler: %s is not supported as output format\n", sws_format_name(dstFormat));

  1982. 		return NULL;

  1983. 	}

  1984. 

  1985. 	/* sanity check */

  1986. 	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

  1987. 	{

  1988. 		 av_log(NULL, AV_LOG_ERROR, "swScaler: %dx%d -> %dx%d is invalid scaling dimension\n", 

  1989. 			srcW, srcH, dstW, dstH);

  1990. 		return NULL;

  1991. 	}

  1992. 

  1993. 	if(!dstFilter) dstFilter= &dummyFilter;

  1994. 	if(!srcFilter) srcFilter= &dummyFilter;

  1995. 

  1996. 	c= av_mallocz(sizeof(SwsContext));

  1997. 

  1998. 	c->av_class = &sws_context_class;

  1999. 	c->srcW= srcW;

  2000. 	c->srcH= srcH;

  2001. 	c->dstW= dstW;

  2002. 	c->dstH= dstH;

  2003. 	c->lumXInc= ((srcW<<16) + (dstW>>1))/dstW;

  2004. 	c->lumYInc= ((srcH<<16) + (dstH>>1))/dstH;

  2005. 	c->flags= flags;

  2006. 	c->dstFormat= dstFormat;

  2007. 	c->srcFormat= srcFormat;

  2008.         c->vRounder= 4* 0x0001000100010001ULL;

  2009. 

  2010. 	usesHFilter= usesVFilter= 0;

  2011. 	if(dstFilter->lumV!=NULL && dstFilter->lumV->length>1) usesVFilter=1;

  2012. 	if(dstFilter->lumH!=NULL && dstFilter->lumH->length>1) usesHFilter=1;

  2013. 	if(dstFilter->chrV!=NULL && dstFilter->chrV->length>1) usesVFilter=1;

  2014. 	if(dstFilter->chrH!=NULL && dstFilter->chrH->length>1) usesHFilter=1;

  2015. 	if(srcFilter->lumV!=NULL && srcFilter->lumV->length>1) usesVFilter=1;

  2016. 	if(srcFilter->lumH!=NULL && srcFilter->lumH->length>1) usesHFilter=1;

  2017. 	if(srcFilter->chrV!=NULL && srcFilter->chrV->length>1) usesVFilter=1;

  2018. 	if(srcFilter->chrH!=NULL && srcFilter->chrH->length>1) usesHFilter=1;

  2019. 

  2020. 	getSubSampleFactors(&c->chrSrcHSubSample, &c->chrSrcVSubSample, srcFormat);

  2021. 	getSubSampleFactors(&c->chrDstHSubSample, &c->chrDstVSubSample, dstFormat);

  2022. 

  2023. 	// reuse chroma for 2 pixles rgb/bgr unless user wants full chroma interpolation

  2024. 	if((isBGR(dstFormat) || isRGB(dstFormat)) && !(flags&SWS_FULL_CHR_H_INT)) c->chrDstHSubSample=1;

  2025. 

  2026. 	// drop some chroma lines if the user wants it

  2027. 	c->vChrDrop= (flags&SWS_SRC_V_CHR_DROP_MASK)>>SWS_SRC_V_CHR_DROP_SHIFT;

  2028. 	c->chrSrcVSubSample+= c->vChrDrop;

  2029. 

  2030. 	// drop every 2. pixel for chroma calculation unless user wants full chroma

  2031. 	if((isBGR(srcFormat) || isRGB(srcFormat)) && !(flags&SWS_FULL_CHR_H_INP)) 

  2032. 		c->chrSrcHSubSample=1;

  2033. 

  2034. 	if(param){

  2035. 		c->param[0] = param[0];

  2036. 		c->param[1] = param[1];

  2037. 	}else{

  2038. 		c->param[0] =

  2039. 		c->param[1] = SWS_PARAM_DEFAULT;

  2040. 	}

  2041. 

  2042. 	c->chrIntHSubSample= c->chrDstHSubSample;

  2043. 	c->chrIntVSubSample= c->chrSrcVSubSample;

  2044. 

  2045. 	// note the -((-x)>>y) is so that we allways round toward +inf

  2046. 	c->chrSrcW= -((-srcW) >> c->chrSrcHSubSample);

  2047. 	c->chrSrcH= -((-srcH) >> c->chrSrcVSubSample);

  2048. 	c->chrDstW= -((-dstW) >> c->chrDstHSubSample);

  2049. 	c->chrDstH= -((-dstH) >> c->chrDstVSubSample);

  2050. 

  2051. 	sws_setColorspaceDetails(c, Inverse_Table_6_9[SWS_CS_DEFAULT], srcRange, Inverse_Table_6_9[SWS_CS_DEFAULT] /* FIXME*/, dstRange, 0, 1<<16, 1<<16); 

  2052. 

  2053. 	/* unscaled special Cases */

  2054. 	if(unscaled && !usesHFilter && !usesVFilter)

  2055. 	{

  2056. 		/* yv12_to_nv12 */

  2057. 		if(srcFormat == PIX_FMT_YUV420P && (dstFormat == PIX_FMT_NV12 || dstFormat == PIX_FMT_NV21))

  2058. 		{

  2059. 			c->swScale= PlanarToNV12Wrapper;

  2060. 		}

  2061. #ifdef CONFIG_GPL

  2062. 		/* yuv2bgr */

  2063. 		if((srcFormat==PIX_FMT_YUV420P || srcFormat==PIX_FMT_YUV422P) && (isBGR(dstFormat) || isRGB(dstFormat)))

  2064. 		{

  2065. 			c->swScale= yuv2rgb_get_func_ptr(c);

  2066. 		}

  2067. #endif

  2068. 		

  2069. 		if( srcFormat==PIX_FMT_YUV410P && dstFormat==PIX_FMT_YUV420P )

  2070. 		{

  2071. 			c->swScale= yvu9toyv12Wrapper;

  2072. 		}

  2073. 

  2074. 		/* bgr24toYV12 */

  2075. 		if(srcFormat==PIX_FMT_BGR24 && dstFormat==PIX_FMT_YUV420P)

  2076. 			c->swScale= bgr24toyv12Wrapper;

  2077. 		

  2078. 		/* rgb/bgr -> rgb/bgr (no dither needed forms) */

  2079. 		if(   (isBGR(srcFormat) || isRGB(srcFormat))

  2080. 		   && (isBGR(dstFormat) || isRGB(dstFormat)) 

  2081. 		   && !needsDither)

  2082. 			c->swScale= rgb2rgbWrapper;

  2083. 

  2084. 		/* LQ converters if -sws 0 or -sws 4*/

  2085. 		if(c->flags&(SWS_FAST_BILINEAR|SWS_POINT)){

  2086. 			/* rgb/bgr -> rgb/bgr (dither needed forms) */

  2087. 			if(  (isBGR(srcFormat) || isRGB(srcFormat))

  2088. 			  && (isBGR(dstFormat) || isRGB(dstFormat)) 

  2089. 			  && needsDither)

  2090. 				c->swScale= rgb2rgbWrapper;

  2091. 

  2092. 			/* yv12_to_yuy2 */

  2093. 			if(srcFormat == PIX_FMT_YUV420P && 

  2094. 			    (dstFormat == PIX_FMT_YUYV422 || dstFormat == PIX_FMT_UYVY422))

  2095. 			{

  2096. 				if (dstFormat == PIX_FMT_YUYV422)

  2097. 				    c->swScale= PlanarToYuy2Wrapper;

  2098. 				else

  2099. 				    c->swScale= PlanarToUyvyWrapper;

  2100. 			}

  2101. 		}

  2102. 

  2103. #ifdef COMPILE_ALTIVEC

  2104. 		if ((c->flags & SWS_CPU_CAPS_ALTIVEC) &&

  2105. 		    ((srcFormat == PIX_FMT_YUV420P && 

  2106. 		      (dstFormat == PIX_FMT_YUYV422 || dstFormat == PIX_FMT_UYVY422)))) {

  2107. 		  // unscaled YV12 -> packed YUV, we want speed

  2108. 		  if (dstFormat == PIX_FMT_YUYV422)

  2109. 		    c->swScale= yv12toyuy2_unscaled_altivec;

  2110. 		  else

  2111. 		    c->swScale= yv12touyvy_unscaled_altivec;

  2112. 		}

  2113. #endif

  2114. 

  2115. 		/* simple copy */

  2116. 		if(   srcFormat == dstFormat

  2117. 		   || (isPlanarYUV(srcFormat) && isGray(dstFormat))

  2118. 		   || (isPlanarYUV(dstFormat) && isGray(srcFormat))

  2119. 		  )

  2120. 		{

  2121. 			c->swScale= simpleCopy;

  2122. 		}

  2123. 

  2124. 		/* gray16{le,be} conversions */

  2125. 		if(isGray16(srcFormat) && (isPlanarYUV(dstFormat) || (dstFormat == PIX_FMT_GRAY8)))

  2126. 		{

  2127. 			c->swScale= gray16togray;

  2128. 		}

  2129. 		if((isPlanarYUV(srcFormat) || (srcFormat == PIX_FMT_GRAY8)) && isGray16(dstFormat))

  2130. 		{

  2131. 			c->swScale= graytogray16;

  2132. 		}

  2133. 		if(srcFormat != dstFormat && isGray16(srcFormat) && isGray16(dstFormat))

  2134. 		{

  2135. 			c->swScale= gray16swap;

  2136. 		}		

  2137. 

  2138. 		if(c->swScale){

  2139. 			if(flags&SWS_PRINT_INFO)

  2140. 				av_log(c, AV_LOG_INFO, "SwScaler: using unscaled %s -> %s special converter\n", 

  2141. 					sws_format_name(srcFormat), sws_format_name(dstFormat));

  2142. 			return c;

  2143. 		}

  2144. 	}

  2145. 

  2146. 	if(flags & SWS_CPU_CAPS_MMX2)

  2147. 	{

  2148. 		c->canMMX2BeUsed= (dstW >=srcW && (dstW&31)==0 && (srcW&15)==0) ? 1 : 0;

  2149. 		if(!c->canMMX2BeUsed && dstW >=srcW && (srcW&15)==0 && (flags&SWS_FAST_BILINEAR))

  2150. 		{

  2151. 			if(flags&SWS_PRINT_INFO)

  2152. 				av_log(c, AV_LOG_INFO, "SwScaler: output Width is not a multiple of 32 -> no MMX2 scaler\n");

  2153. 		}

  2154. 		if(usesHFilter) c->canMMX2BeUsed=0;

  2155. 	}

  2156. 	else

  2157. 		c->canMMX2BeUsed=0;

  2158. 

  2159. 	c->chrXInc= ((c->chrSrcW<<16) + (c->chrDstW>>1))/c->chrDstW;

  2160. 	c->chrYInc= ((c->chrSrcH<<16) + (c->chrDstH>>1))/c->chrDstH;

  2161. 

  2162. 	// match pixel 0 of the src to pixel 0 of dst and match pixel n-2 of src to pixel n-2 of dst

  2163. 	// but only for the FAST_BILINEAR mode otherwise do correct scaling

  2164. 	// n-2 is the last chrominance sample available

  2165. 	// this is not perfect, but noone shuld notice the difference, the more correct variant

  2166. 	// would be like the vertical one, but that would require some special code for the

  2167. 	// first and last pixel

  2168. 	if(flags&SWS_FAST_BILINEAR)

  2169. 	{

  2170. 		if(c->canMMX2BeUsed)

  2171. 		{

  2172. 			c->lumXInc+= 20;

  2173. 			c->chrXInc+= 20;

  2174. 		}

  2175. 		//we don't use the x86asm scaler if mmx is available

  2176. 		else if(flags & SWS_CPU_CAPS_MMX)

  2177. 		{

  2178. 			c->lumXInc = ((srcW-2)<<16)/(dstW-2) - 20;

  2179. 			c->chrXInc = ((c->chrSrcW-2)<<16)/(c->chrDstW-2) - 20;

  2180. 		}

  2181. 	}

  2182. 

  2183. 	/* precalculate horizontal scaler filter coefficients */

  2184. 	{

  2185. 		const int filterAlign=

  2186. 		  (flags & SWS_CPU_CAPS_MMX) ? 4 :

  2187. 		  (flags & SWS_CPU_CAPS_ALTIVEC) ? 8 :

  2188. 		  1;

  2189. 

  2190. 		initFilter(&c->hLumFilter, &c->hLumFilterPos, &c->hLumFilterSize, c->lumXInc,

  2191. 				 srcW      ,       dstW, filterAlign, 1<<14,

  2192. 				 (flags&SWS_BICUBLIN) ? (flags|SWS_BICUBIC)  : flags,

  2193. 				 srcFilter->lumH, dstFilter->lumH, c->param);

  2194. 		initFilter(&c->hChrFilter, &c->hChrFilterPos, &c->hChrFilterSize, c->chrXInc,

  2195. 				 c->chrSrcW, c->chrDstW, filterAlign, 1<<14,

  2196. 				 (flags&SWS_BICUBLIN) ? (flags|SWS_BILINEAR) : flags,

  2197. 				 srcFilter->chrH, dstFilter->chrH, c->param);

  2198. 

  2199. #define MAX_FUNNY_CODE_SIZE 10000

  2200. #if defined(COMPILE_MMX2)

  2201. // can't downscale !!!

  2202. 		if(c->canMMX2BeUsed && (flags & SWS_FAST_BILINEAR))

  2203. 		{

  2204. #ifdef MAP_ANONYMOUS

  2205. 			c->funnyYCode = (uint8_t*)mmap(NULL, MAX_FUNNY_CODE_SIZE, PROT_EXEC | PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, 0, 0);

  2206. 			c->funnyUVCode = (uint8_t*)mmap(NULL, MAX_FUNNY_CODE_SIZE, PROT_EXEC | PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, 0, 0);

  2207. #else

  2208. 			c->funnyYCode = av_malloc(MAX_FUNNY_CODE_SIZE);

  2209. 			c->funnyUVCode = av_malloc(MAX_FUNNY_CODE_SIZE);

  2210. #endif

  2211. 

  2212. 			c->lumMmx2Filter   = av_malloc((dstW        /8+8)*sizeof(int16_t));

  2213. 			c->chrMmx2Filter   = av_malloc((c->chrDstW  /4+8)*sizeof(int16_t));

  2214. 			c->lumMmx2FilterPos= av_malloc((dstW      /2/8+8)*sizeof(int32_t));

  2215. 			c->chrMmx2FilterPos= av_malloc((c->chrDstW/2/4+8)*sizeof(int32_t));

  2216. 

  2217. 			initMMX2HScaler(      dstW, c->lumXInc, c->funnyYCode , c->lumMmx2Filter, c->lumMmx2FilterPos, 8);

  2218. 			initMMX2HScaler(c->chrDstW, c->chrXInc, c->funnyUVCode, c->chrMmx2Filter, c->chrMmx2FilterPos, 4);

  2219. 		}

  2220. #endif /* defined(COMPILE_MMX2) */

  2221. 	} // Init Horizontal stuff

  2222. 

  2223. 

  2224. 

  2225. 	/* precalculate vertical scaler filter coefficients */

  2226. 	{

  2227. 		const int filterAlign=

  2228. 		  (flags & SWS_CPU_CAPS_MMX) && (flags & SWS_ACCURATE_RND) ? 2 :

  2229. 		  (flags & SWS_CPU_CAPS_ALTIVEC) ? 8 :

  2230. 		  1;

  2231. 

  2232. 		initFilter(&c->vLumFilter, &c->vLumFilterPos, &c->vLumFilterSize, c->lumYInc,

  2233. 				srcH      ,        dstH, filterAlign, (1<<12)-4,

  2234. 				(flags&SWS_BICUBLIN) ? (flags|SWS_BICUBIC)  : flags,

  2235. 				srcFilter->lumV, dstFilter->lumV, c->param);

  2236. 		initFilter(&c->vChrFilter, &c->vChrFilterPos, &c->vChrFilterSize, c->chrYInc,

  2237. 				c->chrSrcH, c->chrDstH, filterAlign, (1<<12)-4,

  2238. 				(flags&SWS_BICUBLIN) ? (flags|SWS_BILINEAR) : flags,

  2239. 				srcFilter->chrV, dstFilter->chrV, c->param);

  2240. 

  2241. #ifdef HAVE_ALTIVEC

  2242. 		c->vYCoeffsBank = av_malloc(sizeof (vector signed short)*c->vLumFilterSize*c->dstH);

  2243. 		c->vCCoeffsBank = av_malloc(sizeof (vector signed short)*c->vChrFilterSize*c->chrDstH);

  2244. 

  2245. 		for (i=0;i<c->vLumFilterSize*c->dstH;i++) {

  2246.                   int j;

  2247. 		  short *p = (short *)&c->vYCoeffsBank[i];

  2248. 		  for (j=0;j<8;j++)

  2249. 		    p[j] = c->vLumFilter[i];

  2250. 		}

  2251. 

  2252. 		for (i=0;i<c->vChrFilterSize*c->chrDstH;i++) {

  2253.                   int j;

  2254. 		  short *p = (short *)&c->vCCoeffsBank[i];

  2255. 		  for (j=0;j<8;j++)

  2256. 		    p[j] = c->vChrFilter[i];

  2257. 		}

  2258. #endif

  2259. 	}

  2260. 

  2261. 	// Calculate Buffer Sizes so that they won't run out while handling these damn slices

  2262. 	c->vLumBufSize= c->vLumFilterSize;

  2263. 	c->vChrBufSize= c->vChrFilterSize;

  2264. 	for(i=0; i<dstH; i++)

  2265. 	{

  2266. 		int chrI= i*c->chrDstH / dstH;

  2267. 		int nextSlice= FFMAX(c->vLumFilterPos[i   ] + c->vLumFilterSize - 1,

  2268. 				 ((c->vChrFilterPos[chrI] + c->vChrFilterSize - 1)<<c->chrSrcVSubSample));

  2269. 

  2270. 		nextSlice>>= c->chrSrcVSubSample;

  2271. 		nextSlice<<= c->chrSrcVSubSample;

  2272. 		if(c->vLumFilterPos[i   ] + c->vLumBufSize < nextSlice)

  2273. 			c->vLumBufSize= nextSlice - c->vLumFilterPos[i   ];

  2274. 		if(c->vChrFilterPos[chrI] + c->vChrBufSize < (nextSlice>>c->chrSrcVSubSample))

  2275. 			c->vChrBufSize= (nextSlice>>c->chrSrcVSubSample) - c->vChrFilterPos[chrI];

  2276. 	}

  2277. 

  2278. 	// allocate pixbufs (we use dynamic allocation because otherwise we would need to

  2279. 	c->lumPixBuf= av_malloc(c->vLumBufSize*2*sizeof(int16_t*));

  2280. 	c->chrPixBuf= av_malloc(c->vChrBufSize*2*sizeof(int16_t*));

  2281. 	//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)

  2282. 	/* align at 16 bytes for AltiVec */

  2283. 	for(i=0; i<c->vLumBufSize; i++)

  2284. 		c->lumPixBuf[i]= c->lumPixBuf[i+c->vLumBufSize]= av_mallocz(4000);

  2285. 	for(i=0; i<c->vChrBufSize; i++)

  2286. 		c->chrPixBuf[i]= c->chrPixBuf[i+c->vChrBufSize]= av_malloc(8000);

  2287. 

  2288. 	//try to avoid drawing green stuff between the right end and the stride end

  2289. 	for(i=0; i<c->vChrBufSize; i++) memset(c->chrPixBuf[i], 64, 8000);

  2290. 

  2291. 	ASSERT(c->chrDstH <= dstH)

  2292. 

  2293. 	if(flags&SWS_PRINT_INFO)

  2294. 	{

  2295. #ifdef DITHER1XBPP

  2296. 		char *dither= " dithered";

  2297. #else

  2298. 		char *dither= "";

  2299. #endif

  2300. 		if(flags&SWS_FAST_BILINEAR)

  2301. 			av_log(c, AV_LOG_INFO, "SwScaler: FAST_BILINEAR scaler, ");

  2302. 		else if(flags&SWS_BILINEAR)

  2303. 			av_log(c, AV_LOG_INFO, "SwScaler: BILINEAR scaler, ");

  2304. 		else if(flags&SWS_BICUBIC)

  2305. 			av_log(c, AV_LOG_INFO, "SwScaler: BICUBIC scaler, ");

  2306. 		else if(flags&SWS_X)

  2307. 			av_log(c, AV_LOG_INFO, "SwScaler: Experimental scaler, ");

  2308. 		else if(flags&SWS_POINT)

  2309. 			av_log(c, AV_LOG_INFO, "SwScaler: Nearest Neighbor / POINT scaler, ");

  2310. 		else if(flags&SWS_AREA)

  2311. 			av_log(c, AV_LOG_INFO, "SwScaler: Area Averageing scaler, ");

  2312. 		else if(flags&SWS_BICUBLIN)

  2313. 			av_log(c, AV_LOG_INFO, "SwScaler: luma BICUBIC / chroma BILINEAR scaler, ");

  2314. 		else if(flags&SWS_GAUSS)

  2315. 			av_log(c, AV_LOG_INFO, "SwScaler: Gaussian scaler, ");

  2316. 		else if(flags&SWS_SINC)

  2317. 			av_log(c, AV_LOG_INFO, "SwScaler: Sinc scaler, ");

  2318. 		else if(flags&SWS_LANCZOS)

  2319. 			av_log(c, AV_LOG_INFO, "SwScaler: Lanczos scaler, ");

  2320. 		else if(flags&SWS_SPLINE)

  2321. 			av_log(c, AV_LOG_INFO, "SwScaler: Bicubic spline scaler, ");

  2322. 		else

  2323. 			av_log(c, AV_LOG_INFO, "SwScaler: ehh flags invalid?! ");

  2324. 

  2325. 		if(dstFormat==PIX_FMT_BGR555 || dstFormat==PIX_FMT_BGR565)

  2326. 			av_log(c, AV_LOG_INFO, "from %s to%s %s ", 

  2327. 				sws_format_name(srcFormat), dither, sws_format_name(dstFormat));

  2328. 		else

  2329. 			av_log(c, AV_LOG_INFO, "from %s to %s ", 

  2330. 				sws_format_name(srcFormat), sws_format_name(dstFormat));

  2331. 

  2332. 		if(flags & SWS_CPU_CAPS_MMX2)

  2333. 			av_log(c, AV_LOG_INFO, "using MMX2\n");

  2334. 		else if(flags & SWS_CPU_CAPS_3DNOW)

  2335. 			av_log(c, AV_LOG_INFO, "using 3DNOW\n");

  2336. 		else if(flags & SWS_CPU_CAPS_MMX)

  2337. 			av_log(c, AV_LOG_INFO, "using MMX\n");

  2338. 		else if(flags & SWS_CPU_CAPS_ALTIVEC)

  2339. 			av_log(c, AV_LOG_INFO, "using AltiVec\n");

  2340. 		else 

  2341. 			av_log(c, AV_LOG_INFO, "using C\n");

  2342. 	}

  2343. 

  2344. 	if(flags & SWS_PRINT_INFO)

  2345. 	{

  2346. 		if(flags & SWS_CPU_CAPS_MMX)

  2347. 		{

  2348. 			if(c->canMMX2BeUsed && (flags&SWS_FAST_BILINEAR))

  2349. 				av_log(c, AV_LOG_VERBOSE, "SwScaler: using FAST_BILINEAR MMX2 scaler for horizontal scaling\n");

  2350. 			else

  2351. 			{

  2352. 				if(c->hLumFilterSize==4)

  2353. 					av_log(c, AV_LOG_VERBOSE, "SwScaler: using 4-tap MMX scaler for horizontal luminance scaling\n");

  2354. 				else if(c->hLumFilterSize==8)

  2355. 					av_log(c, AV_LOG_VERBOSE, "SwScaler: using 8-tap MMX scaler for horizontal luminance scaling\n");

  2356. 				else

  2357. 					av_log(c, AV_LOG_VERBOSE, "SwScaler: using n-tap MMX scaler for horizontal luminance scaling\n");

  2358. 

  2359. 				if(c->hChrFilterSize==4)

  2360. 					av_log(c, AV_LOG_VERBOSE, "SwScaler: using 4-tap MMX scaler for horizontal chrominance scaling\n");

  2361. 				else if(c->hChrFilterSize==8)

  2362. 					av_log(c, AV_LOG_VERBOSE, "SwScaler: using 8-tap MMX scaler for horizontal chrominance scaling\n");

  2363. 				else

  2364. 					av_log(c, AV_LOG_VERBOSE, "SwScaler: using n-tap MMX scaler for horizontal chrominance scaling\n");

  2365. 			}

  2366. 		}

  2367. 		else

  2368. 		{

  2369. #if defined(ARCH_X86)

  2370. 			av_log(c, AV_LOG_VERBOSE, "SwScaler: using X86-Asm scaler for horizontal scaling\n");

  2371. #else

  2372. 			if(flags & SWS_FAST_BILINEAR)

  2373. 				av_log(c, AV_LOG_VERBOSE, "SwScaler: using FAST_BILINEAR C scaler for horizontal scaling\n");

  2374. 			else

  2375. 				av_log(c, AV_LOG_VERBOSE, "SwScaler: using C scaler for horizontal scaling\n");

  2376. #endif

  2377. 		}

  2378. 		if(isPlanarYUV(dstFormat))

  2379. 		{

  2380. 			if(c->vLumFilterSize==1)

  2381. 				av_log(c, AV_LOG_VERBOSE, "SwScaler: using 1-tap %s \"scaler\" for vertical scaling (YV12 like)\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");

  2382. 			else

  2383. 				av_log(c, AV_LOG_VERBOSE, "SwScaler: using n-tap %s scaler for vertical scaling (YV12 like)\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");

  2384. 		}

  2385. 		else

  2386. 		{

  2387. 			if(c->vLumFilterSize==1 && c->vChrFilterSize==2)

  2388. 				av_log(c, AV_LOG_VERBOSE, "SwScaler: using 1-tap %s \"scaler\" for vertical luminance scaling (BGR)\n"

  2389. 				       "SwScaler:       2-tap scaler for vertical chrominance scaling (BGR)\n",(flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");

  2390. 			else if(c->vLumFilterSize==2 && c->vChrFilterSize==2)

  2391. 				av_log(c, AV_LOG_VERBOSE, "SwScaler: using 2-tap linear %s scaler for vertical scaling (BGR)\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");

  2392. 			else

  2393. 				av_log(c, AV_LOG_VERBOSE, "SwScaler: using n-tap %s scaler for vertical scaling (BGR)\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");

  2394. 		}

  2395. 

  2396. 		if(dstFormat==PIX_FMT_BGR24)

  2397. 			av_log(c, AV_LOG_VERBOSE, "SwScaler: using %s YV12->BGR24 Converter\n",

  2398. 				(flags & SWS_CPU_CAPS_MMX2) ? "MMX2" : ((flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C"));

  2399. 		else if(dstFormat==PIX_FMT_RGB32)

  2400. 			av_log(c, AV_LOG_VERBOSE, "SwScaler: using %s YV12->BGR32 Converter\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");

  2401. 		else if(dstFormat==PIX_FMT_BGR565)

  2402. 			av_log(c, AV_LOG_VERBOSE, "SwScaler: using %s YV12->BGR16 Converter\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");

  2403. 		else if(dstFormat==PIX_FMT_BGR555)

  2404. 			av_log(c, AV_LOG_VERBOSE, "SwScaler: using %s YV12->BGR15 Converter\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");

  2405. 

  2406. 		av_log(c, AV_LOG_VERBOSE, "SwScaler: %dx%d -> %dx%d\n", srcW, srcH, dstW, dstH);

  2407. 	}

  2408. 	if(flags & SWS_PRINT_INFO)

  2409. 	{

  2410. 		av_log(c, AV_LOG_DEBUG, "SwScaler:Lum srcW=%d srcH=%d dstW=%d dstH=%d xInc=%d yInc=%d\n",

  2411. 			c->srcW, c->srcH, c->dstW, c->dstH, c->lumXInc, c->lumYInc);

  2412. 		av_log(c, AV_LOG_DEBUG, "SwScaler:Chr srcW=%d srcH=%d dstW=%d dstH=%d xInc=%d yInc=%d\n",

  2413. 			c->chrSrcW, c->chrSrcH, c->chrDstW, c->chrDstH, c->chrXInc, c->chrYInc);

  2414. 	}

  2415. 

  2416. 	c->swScale= getSwsFunc(flags);

  2417. 	return c;

  2418. }

  2419. 

  2420. /**

  2421.  * swscale warper, so we don't need to export the SwsContext.

  2422.  * assumes planar YUV to be in YUV order instead of YVU

  2423.  */

  2424. int sws_scale(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  2425.                            int srcSliceH, uint8_t* dst[], int dstStride[]){

  2426. 	if (c->sliceDir == 0 && srcSliceY != 0 && srcSliceY + srcSliceH != c->srcH) {

  2427. 	    av_log(c, AV_LOG_ERROR, "swScaler: slices start in the middle!\n");

  2428. 	    return 0;

  2429. 	}

  2430. 	if (c->sliceDir == 0) {

  2431. 	    if (srcSliceY == 0) c->sliceDir = 1; else c->sliceDir = -1;

  2432. 	}

  2433. 

  2434. 	// copy strides, so they can safely be modified

  2435. 	if (c->sliceDir == 1) {

  2436. 	    // slices go from top to bottom

  2437. 	    int srcStride2[3]= {srcStride[0], srcStride[1], srcStride[2]};

  2438. 	    int dstStride2[3]= {dstStride[0], dstStride[1], dstStride[2]};

  2439. 	    return c->swScale(c, src, srcStride2, srcSliceY, srcSliceH, dst, dstStride2);

  2440. 	} else {

  2441. 	    // slices go from bottom to top => we flip the image internally

  2442. 	    uint8_t* src2[3]= {src[0] + (srcSliceH-1)*srcStride[0],

  2443. 			       src[1] + ((srcSliceH>>c->chrSrcVSubSample)-1)*srcStride[1],

  2444. 			       src[2] + ((srcSliceH>>c->chrSrcVSubSample)-1)*srcStride[2]

  2445. 	    };

  2446. 	    uint8_t* dst2[3]= {dst[0] + (c->dstH-1)*dstStride[0],

  2447. 			       dst[1] + ((c->dstH>>c->chrDstVSubSample)-1)*dstStride[1],

  2448. 			       dst[2] + ((c->dstH>>c->chrDstVSubSample)-1)*dstStride[2]};

  2449. 	    int srcStride2[3]= {-srcStride[0], -srcStride[1], -srcStride[2]};

  2450. 	    int dstStride2[3]= {-dstStride[0], -dstStride[1], -dstStride[2]};

  2451. 	    

  2452. 	    return c->swScale(c, src2, srcStride2, c->srcH-srcSliceY-srcSliceH, srcSliceH, dst2, dstStride2);

  2453. 	}

  2454. }

  2455. 

  2456. /**

  2457.  * swscale warper, so we don't need to export the SwsContext

  2458.  */

  2459. int sws_scale_ordered(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  2460.                            int srcSliceH, uint8_t* dst[], int dstStride[]){

  2461. 	return sws_scale(c, src, srcStride, srcSliceY, srcSliceH, dst, dstStride);

  2462. }

  2463. 

  2464. SwsFilter *sws_getDefaultFilter(float lumaGBlur, float chromaGBlur, 

  2465. 				float lumaSharpen, float chromaSharpen,

  2466. 				float chromaHShift, float chromaVShift,

  2467. 				int verbose)

  2468. {

  2469. 	SwsFilter *filter= av_malloc(sizeof(SwsFilter));

  2470. 

  2471. 	if(lumaGBlur!=0.0){

  2472. 		filter->lumH= sws_getGaussianVec(lumaGBlur, 3.0);

  2473. 		filter->lumV= sws_getGaussianVec(lumaGBlur, 3.0);

  2474. 	}else{

  2475. 		filter->lumH= sws_getIdentityVec();

  2476. 		filter->lumV= sws_getIdentityVec();

  2477. 	}

  2478. 

  2479. 	if(chromaGBlur!=0.0){

  2480. 		filter->chrH= sws_getGaussianVec(chromaGBlur, 3.0);

  2481. 		filter->chrV= sws_getGaussianVec(chromaGBlur, 3.0);

  2482. 	}else{

  2483. 		filter->chrH= sws_getIdentityVec();

  2484. 		filter->chrV= sws_getIdentityVec();

  2485. 	}

  2486. 

  2487. 	if(chromaSharpen!=0.0){

  2488. 		SwsVector *id= sws_getIdentityVec();

  2489.                 sws_scaleVec(filter->chrH, -chromaSharpen);

  2490.                 sws_scaleVec(filter->chrV, -chromaSharpen);

  2491. 		sws_addVec(filter->chrH, id);

  2492. 		sws_addVec(filter->chrV, id);

  2493. 		sws_freeVec(id);

  2494. 	}

  2495. 

  2496. 	if(lumaSharpen!=0.0){

  2497. 		SwsVector *id= sws_getIdentityVec();

  2498.                 sws_scaleVec(filter->lumH, -lumaSharpen);

  2499.                 sws_scaleVec(filter->lumV, -lumaSharpen);

  2500. 		sws_addVec(filter->lumH, id);

  2501. 		sws_addVec(filter->lumV, id);

  2502. 		sws_freeVec(id);

  2503. 	}

  2504. 

  2505. 	if(chromaHShift != 0.0)

  2506. 		sws_shiftVec(filter->chrH, (int)(chromaHShift+0.5));

  2507. 

  2508. 	if(chromaVShift != 0.0)

  2509. 		sws_shiftVec(filter->chrV, (int)(chromaVShift+0.5));

  2510. 

  2511. 	sws_normalizeVec(filter->chrH, 1.0);

  2512. 	sws_normalizeVec(filter->chrV, 1.0);

  2513. 	sws_normalizeVec(filter->lumH, 1.0);

  2514. 	sws_normalizeVec(filter->lumV, 1.0);

  2515. 

  2516. 	if(verbose) sws_printVec(filter->chrH);

  2517. 	if(verbose) sws_printVec(filter->lumH);

  2518. 

  2519.         return filter;

  2520. }

  2521. 

  2522. /**

  2523.  * returns a normalized gaussian curve used to filter stuff

  2524.  * quality=3 is high quality, lowwer is lowwer quality

  2525.  */

  2526. SwsVector *sws_getGaussianVec(double variance, double quality){

  2527. 	const int length= (int)(variance*quality + 0.5) | 1;

  2528. 	int i;

  2529. 	double *coeff= av_malloc(length*sizeof(double));

  2530. 	double middle= (length-1)*0.5;

  2531. 	SwsVector *vec= av_malloc(sizeof(SwsVector));

  2532. 

  2533. 	vec->coeff= coeff;

  2534. 	vec->length= length;

  2535. 

  2536. 	for(i=0; i<length; i++)

  2537. 	{

  2538. 		double dist= i-middle;

  2539. 		coeff[i]= exp( -dist*dist/(2*variance*variance) ) / sqrt(2*variance*PI);

  2540. 	}

  2541. 

  2542. 	sws_normalizeVec(vec, 1.0);

  2543. 

  2544. 	return vec;

  2545. }

  2546. 

  2547. SwsVector *sws_getConstVec(double c, int length){

  2548. 	int i;

  2549. 	double *coeff= av_malloc(length*sizeof(double));

  2550. 	SwsVector *vec= av_malloc(sizeof(SwsVector));

  2551. 

  2552. 	vec->coeff= coeff;

  2553. 	vec->length= length;

  2554. 

  2555. 	for(i=0; i<length; i++)

  2556. 		coeff[i]= c;

  2557. 

  2558. 	return vec;

  2559. }

  2560. 

  2561. 

  2562. SwsVector *sws_getIdentityVec(void){

  2563.         return sws_getConstVec(1.0, 1);

  2564. }

  2565. 

  2566. double sws_dcVec(SwsVector *a){

  2567. 	int i;

  2568.         double sum=0;

  2569. 

  2570. 	for(i=0; i<a->length; i++)

  2571. 		sum+= a->coeff[i];

  2572. 

  2573.         return sum;

  2574. }

  2575. 

  2576. void sws_scaleVec(SwsVector *a, double scalar){

  2577. 	int i;

  2578. 

  2579. 	for(i=0; i<a->length; i++)

  2580. 		a->coeff[i]*= scalar;

  2581. }

  2582. 

  2583. void sws_normalizeVec(SwsVector *a, double height){

  2584.         sws_scaleVec(a, height/sws_dcVec(a));

  2585. }

  2586. 

  2587. static SwsVector *sws_getConvVec(SwsVector *a, SwsVector *b){

  2588. 	int length= a->length + b->length - 1;

  2589. 	double *coeff= av_malloc(length*sizeof(double));

  2590. 	int i, j;

  2591. 	SwsVector *vec= av_malloc(sizeof(SwsVector));

  2592. 

  2593. 	vec->coeff= coeff;

  2594. 	vec->length= length;

  2595. 

  2596. 	for(i=0; i<length; i++) coeff[i]= 0.0;

  2597. 

  2598. 	for(i=0; i<a->length; i++)

  2599. 	{

  2600. 		for(j=0; j<b->length; j++)

  2601. 		{

  2602. 			coeff[i+j]+= a->coeff[i]*b->coeff[j];

  2603. 		}

  2604. 	}

  2605. 

  2606. 	return vec;

  2607. }

  2608. 

  2609. static SwsVector *sws_sumVec(SwsVector *a, SwsVector *b){

  2610. 	int length= FFMAX(a->length, b->length);

  2611. 	double *coeff= av_malloc(length*sizeof(double));

  2612. 	int i;

  2613. 	SwsVector *vec= av_malloc(sizeof(SwsVector));

  2614. 

  2615. 	vec->coeff= coeff;

  2616. 	vec->length= length;

  2617. 

  2618. 	for(i=0; i<length; i++) coeff[i]= 0.0;

  2619. 

  2620. 	for(i=0; i<a->length; i++) coeff[i + (length-1)/2 - (a->length-1)/2]+= a->coeff[i];

  2621. 	for(i=0; i<b->length; i++) coeff[i + (length-1)/2 - (b->length-1)/2]+= b->coeff[i];

  2622. 

  2623. 	return vec;

  2624. }

  2625. 

  2626. static SwsVector *sws_diffVec(SwsVector *a, SwsVector *b){

  2627. 	int length= FFMAX(a->length, b->length);

  2628. 	double *coeff= av_malloc(length*sizeof(double));

  2629. 	int i;

  2630. 	SwsVector *vec= av_malloc(sizeof(SwsVector));

  2631. 

  2632. 	vec->coeff= coeff;

  2633. 	vec->length= length;

  2634. 

  2635. 	for(i=0; i<length; i++) coeff[i]= 0.0;

  2636. 

  2637. 	for(i=0; i<a->length; i++) coeff[i + (length-1)/2 - (a->length-1)/2]+= a->coeff[i];

  2638. 	for(i=0; i<b->length; i++) coeff[i + (length-1)/2 - (b->length-1)/2]-= b->coeff[i];

  2639. 

  2640. 	return vec;

  2641. }

  2642. 

  2643. /* shift left / or right if "shift" is negative */

  2644. static SwsVector *sws_getShiftedVec(SwsVector *a, int shift){

  2645. 	int length= a->length + FFABS(shift)*2;

  2646. 	double *coeff= av_malloc(length*sizeof(double));

  2647. 	int i;

  2648. 	SwsVector *vec= av_malloc(sizeof(SwsVector));

  2649. 

  2650. 	vec->coeff= coeff;

  2651. 	vec->length= length;

  2652. 

  2653. 	for(i=0; i<length; i++) coeff[i]= 0.0;

  2654. 

  2655. 	for(i=0; i<a->length; i++)

  2656. 	{

  2657. 		coeff[i + (length-1)/2 - (a->length-1)/2 - shift]= a->coeff[i];

  2658. 	}

  2659. 

  2660. 	return vec;

  2661. }

  2662. 

  2663. void sws_shiftVec(SwsVector *a, int shift){

  2664. 	SwsVector *shifted= sws_getShiftedVec(a, shift);

  2665. 	av_free(a->coeff);

  2666. 	a->coeff= shifted->coeff;

  2667. 	a->length= shifted->length;

  2668. 	av_free(shifted);

  2669. }

  2670. 

  2671. void sws_addVec(SwsVector *a, SwsVector *b){

  2672. 	SwsVector *sum= sws_sumVec(a, b);

  2673. 	av_free(a->coeff);

  2674. 	a->coeff= sum->coeff;

  2675. 	a->length= sum->length;

  2676. 	av_free(sum);

  2677. }

  2678. 

  2679. void sws_subVec(SwsVector *a, SwsVector *b){

  2680. 	SwsVector *diff= sws_diffVec(a, b);

  2681. 	av_free(a->coeff);

  2682. 	a->coeff= diff->coeff;

  2683. 	a->length= diff->length;

  2684. 	av_free(diff);

  2685. }

  2686. 

  2687. void sws_convVec(SwsVector *a, SwsVector *b){

  2688. 	SwsVector *conv= sws_getConvVec(a, b);

  2689. 	av_free(a->coeff);  

  2690. 	a->coeff= conv->coeff;

  2691. 	a->length= conv->length;

  2692. 	av_free(conv);

  2693. }

  2694. 

  2695. SwsVector *sws_cloneVec(SwsVector *a){

  2696. 	double *coeff= av_malloc(a->length*sizeof(double));

  2697. 	int i;

  2698. 	SwsVector *vec= av_malloc(sizeof(SwsVector));

  2699. 

  2700. 	vec->coeff= coeff;

  2701. 	vec->length= a->length;

  2702. 

  2703. 	for(i=0; i<a->length; i++) coeff[i]= a->coeff[i];

  2704. 

  2705. 	return vec;

  2706. }

  2707. 

  2708. void sws_printVec(SwsVector *a){

  2709. 	int i;

  2710. 	double max=0;

  2711. 	double min=0;

  2712. 	double range;

  2713. 

  2714. 	for(i=0; i<a->length; i++)

  2715. 		if(a->coeff[i]>max) max= a->coeff[i];

  2716. 

  2717. 	for(i=0; i<a->length; i++)

  2718. 		if(a->coeff[i]<min) min= a->coeff[i];

  2719. 

  2720. 	range= max - min;

  2721. 

  2722. 	for(i=0; i<a->length; i++)

  2723. 	{

  2724. 		int x= (int)((a->coeff[i]-min)*60.0/range +0.5);

  2725. 		av_log(NULL, AV_LOG_DEBUG, "%1.3f ", a->coeff[i]);

  2726. 		for(;x>0; x--) av_log(NULL, AV_LOG_DEBUG, " ");

  2727. 		av_log(NULL, AV_LOG_DEBUG, "|\n");

  2728. 	}

  2729. }

  2730. 

  2731. void sws_freeVec(SwsVector *a){

  2732. 	if(!a) return;

  2733. 	av_free(a->coeff);

  2734. 	a->coeff=NULL;

  2735. 	a->length=0;

  2736. 	av_free(a);

  2737. }

  2738. 

  2739. void sws_freeFilter(SwsFilter *filter){

  2740. 	if(!filter) return;

  2741. 

  2742. 	if(filter->lumH) sws_freeVec(filter->lumH);

  2743. 	if(filter->lumV) sws_freeVec(filter->lumV);

  2744. 	if(filter->chrH) sws_freeVec(filter->chrH);

  2745. 	if(filter->chrV) sws_freeVec(filter->chrV);

  2746. 	av_free(filter);

  2747. }

  2748. 

  2749. 

  2750. void sws_freeContext(SwsContext *c){

  2751. 	int i;

  2752. 	if(!c) return;

  2753. 

  2754. 	if(c->lumPixBuf)

  2755. 	{

  2756. 		for(i=0; i<c->vLumBufSize; i++)

  2757. 		{

  2758. 			av_free(c->lumPixBuf[i]);

  2759. 			c->lumPixBuf[i]=NULL;

  2760. 		}

  2761. 		av_free(c->lumPixBuf);

  2762. 		c->lumPixBuf=NULL;

  2763. 	}

  2764. 

  2765. 	if(c->chrPixBuf)

  2766. 	{

  2767. 		for(i=0; i<c->vChrBufSize; i++)

  2768. 		{

  2769. 			av_free(c->chrPixBuf[i]);

  2770. 			c->chrPixBuf[i]=NULL;

  2771. 		}

  2772. 		av_free(c->chrPixBuf);

  2773. 		c->chrPixBuf=NULL;

  2774. 	}

  2775. 

  2776. 	av_free(c->vLumFilter);

  2777. 	c->vLumFilter = NULL;

  2778. 	av_free(c->vChrFilter);

  2779. 	c->vChrFilter = NULL;

  2780. 	av_free(c->hLumFilter);

  2781. 	c->hLumFilter = NULL;

  2782. 	av_free(c->hChrFilter);

  2783. 	c->hChrFilter = NULL;

  2784. #ifdef HAVE_ALTIVEC

  2785. 	av_free(c->vYCoeffsBank);

  2786. 	c->vYCoeffsBank = NULL;

  2787. 	av_free(c->vCCoeffsBank);

  2788. 	c->vCCoeffsBank = NULL;

  2789. #endif

  2790. 

  2791. 	av_free(c->vLumFilterPos);

  2792. 	c->vLumFilterPos = NULL;

  2793. 	av_free(c->vChrFilterPos);

  2794. 	c->vChrFilterPos = NULL;

  2795. 	av_free(c->hLumFilterPos);

  2796. 	c->hLumFilterPos = NULL;

  2797. 	av_free(c->hChrFilterPos);

  2798. 	c->hChrFilterPos = NULL;

  2799. 

  2800. #if defined(ARCH_X86) && defined(CONFIG_GPL)

  2801. #ifdef MAP_ANONYMOUS

  2802. 	if(c->funnyYCode) munmap(c->funnyYCode, MAX_FUNNY_CODE_SIZE);

  2803. 	if(c->funnyUVCode) munmap(c->funnyUVCode, MAX_FUNNY_CODE_SIZE);

  2804. #else

  2805. 	av_free(c->funnyYCode);

  2806. 	av_free(c->funnyUVCode);

  2807. #endif

  2808. 	c->funnyYCode=NULL;

  2809. 	c->funnyUVCode=NULL;

  2810. #endif /* defined(ARCH_X86) */

  2811. 

  2812. 	av_free(c->lumMmx2Filter);

  2813. 	c->lumMmx2Filter=NULL;

  2814. 	av_free(c->chrMmx2Filter);

  2815. 	c->chrMmx2Filter=NULL;

  2816. 	av_free(c->lumMmx2FilterPos);

  2817. 	c->lumMmx2FilterPos=NULL;

  2818. 	av_free(c->chrMmx2FilterPos);

  2819. 	c->chrMmx2FilterPos=NULL;

  2820. 	av_free(c->yuvTable);

  2821. 	c->yuvTable=NULL;

  2822. 

  2823. 	av_free(c);

  2824. }

  2825. 

  2826. /**

  2827.  * Checks if context is valid or reallocs a new one instead.

  2828.  * If context is NULL, just calls sws_getContext() to get a new one.

  2829.  * Otherwise, checks if the parameters are the same already saved in context.

  2830.  * If that is the case, returns the current context.

  2831.  * Otherwise, frees context and gets a new one.

  2832.  *

  2833.  * Be warned that srcFilter, dstFilter are not checked, they are

  2834.  * asumed to remain valid.

  2835.  */

  2836. struct SwsContext *sws_getCachedContext(struct SwsContext *context,

  2837.                         int srcW, int srcH, int srcFormat,

  2838.                         int dstW, int dstH, int dstFormat, int flags,

  2839.                         SwsFilter *srcFilter, SwsFilter *dstFilter, double *param)

  2840. {

  2841.     if (context != NULL) {

  2842.         if ((context->srcW != srcW) || (context->srcH != srcH) ||

  2843.             (context->srcFormat != srcFormat) ||

  2844.             (context->dstW != dstW) || (context->dstH != dstH) ||

  2845.             (context->dstFormat != dstFormat) || (context->flags != flags) ||

  2846.             (context->param != param))

  2847.         {

  2848.             sws_freeContext(context);

  2849.             context = NULL;

  2850.         }

  2851.     }

  2852.     if (context == NULL) {

  2853.         return sws_getContext(srcW, srcH, srcFormat,

  2854.                         dstW, dstH, dstFormat, flags,

  2855.                         srcFilter, dstFilter, param);

  2856.     }

  2857.     return context;

  2858. }