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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, PAL8

  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. 			|| (x)==PIX_FMT_PAL8 || (x)==PIX_FMT_BGR8 || (x)==PIX_FMT_RGB8\

  112.                         || (x)==PIX_FMT_BGR4_BYTE  || (x)==PIX_FMT_RGB4_BYTE)

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

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

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

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

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

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

  119. #define isPacked(x)    ((x)==PIX_FMT_PAL8 || (x)==PIX_FMT_YUYV422 ||\

  120.                         (x)==PIX_FMT_UYVY422 || isRGB(x) || isBGR(x))

  121. 

  122. #define RGB2YUV_SHIFT 16

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

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

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

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

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

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

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

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

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

  132. 

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

  134. 

  135. /*

  136. NOTES

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

  138. 

  139. TODO

  140. more intelligent missalignment avoidance for the horizontal scaler

  141. write special vertical cubic upscale version

  142. Optimize C code (yv12 / minmax)

  143. add support for packed pixel yuv input & output

  144. add support for Y8 output

  145. optimize bgr24 & bgr32

  146. add BGR4 output support

  147. write special BGR->BGR scaler

  148. */

  149. 

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

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

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

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

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

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

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

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

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

  159. 

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

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

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

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

  164. 

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

  166. 	0x0103010301030103LL,

  167. 	0x0200020002000200LL,};

  168. 

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

  170. 	0x0602060206020602LL,

  171. 	0x0004000400040004LL,};

  172. 

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

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

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

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

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

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

  179. 

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

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

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

  183. 

  184. #ifdef FAST_BGR2YV12

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

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

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

  188. #else

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

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

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

  192. #endif /* FAST_BGR2YV12 */

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

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

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

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

  197. 

  198. // clipping helper table for C implementations:

  199. static unsigned char clip_table[768];

  200. 

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

  202. 		  

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

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

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

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

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

  208. 

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

  210.     return "swscaler";

  211. }

  212. 

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

  214. 

  215. char *sws_format_name(enum PixelFormat format)

  216. {

  217.     switch (format) {

  218.         case PIX_FMT_YUV420P:

  219.             return "yuv420p";

  220.         case PIX_FMT_YUYV422:

  221.             return "yuyv422";

  222.         case PIX_FMT_RGB24:

  223.             return "rgb24";

  224.         case PIX_FMT_BGR24:

  225.             return "bgr24";

  226.         case PIX_FMT_YUV422P:

  227.             return "yuv422p";

  228.         case PIX_FMT_YUV444P:

  229.             return "yuv444p";

  230.         case PIX_FMT_RGB32:

  231.             return "rgb32";

  232.         case PIX_FMT_YUV410P:

  233.             return "yuv410p";

  234.         case PIX_FMT_YUV411P:

  235.             return "yuv411p";

  236.         case PIX_FMT_RGB565:

  237.             return "rgb565";

  238.         case PIX_FMT_RGB555:

  239.             return "rgb555";

  240.         case PIX_FMT_GRAY16BE:

  241.             return "gray16be";

  242.         case PIX_FMT_GRAY16LE:

  243.             return "gray16le";

  244.         case PIX_FMT_GRAY8:

  245.             return "gray8";

  246.         case PIX_FMT_MONOWHITE:

  247.             return "mono white";

  248.         case PIX_FMT_MONOBLACK:

  249.             return "mono black";

  250.         case PIX_FMT_PAL8:

  251.             return "Palette";

  252.         case PIX_FMT_YUVJ420P:

  253.             return "yuvj420p";

  254.         case PIX_FMT_YUVJ422P:

  255.             return "yuvj422p";

  256.         case PIX_FMT_YUVJ444P:

  257.             return "yuvj444p";

  258.         case PIX_FMT_XVMC_MPEG2_MC:

  259.             return "xvmc_mpeg2_mc";

  260.         case PIX_FMT_XVMC_MPEG2_IDCT:

  261.             return "xvmc_mpeg2_idct";

  262.         case PIX_FMT_UYVY422:

  263.             return "uyvy422";

  264.         case PIX_FMT_UYYVYY411:

  265.             return "uyyvyy411";

  266.         case PIX_FMT_RGB32_1:

  267.             return "rgb32x";

  268.         case PIX_FMT_BGR32_1:

  269.             return "bgr32x";

  270.         case PIX_FMT_BGR32:

  271.             return "bgr32";

  272.         case PIX_FMT_BGR565:

  273.             return "bgr565";

  274.         case PIX_FMT_BGR555:

  275.             return "bgr555";

  276.         case PIX_FMT_BGR8:

  277.             return "bgr8";

  278.         case PIX_FMT_BGR4:

  279.             return "bgr4";

  280.         case PIX_FMT_BGR4_BYTE:

  281.             return "bgr4 byte";

  282.         case PIX_FMT_RGB8:

  283.             return "rgb8";

  284.         case PIX_FMT_RGB4:

  285.             return "rgb4";

  286.         case PIX_FMT_RGB4_BYTE:

  287.             return "rgb4 byte";

  288.         case PIX_FMT_NV12:

  289.             return "nv12";

  290.         case PIX_FMT_NV21:

  291.             return "nv21";

  292.         default:

  293.             return "Unknown format";

  294.     }

  295. }

  296. 

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

  298. void in_asm_used_var_warning_killer()

  299. {

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

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

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

  303.  if(i) i=0;

  304. }

  305. #endif

  306. 

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

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

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

  310. {

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

  312. 	int i;

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

  314. 	{

  315. 		int val=1<<18;

  316. 		int j;

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

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

  319. 

  320. 		dest[i]= av_clip_uint8(val>>19);

  321. 	}

  322. 

  323. 	if(uDest != NULL)

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

  325. 		{

  326. 			int u=1<<18;

  327. 			int v=1<<18;

  328. 			int j;

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

  330. 			{

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

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

  333. 			}

  334. 

  335. 			uDest[i]= av_clip_uint8(u>>19);

  336. 			vDest[i]= av_clip_uint8(v>>19);

  337. 		}

  338. }

  339. 

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

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

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

  343. {

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

  345. 	int i;

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

  347. 	{

  348. 		int val=1<<18;

  349. 		int j;

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

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

  352. 

  353. 		dest[i]= av_clip_uint8(val>>19);

  354. 	}

  355. 

  356. 	if(uDest == NULL)

  357. 		return;

  358. 

  359. 	if(dstFormat == PIX_FMT_NV12)

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

  361. 		{

  362. 			int u=1<<18;

  363. 			int v=1<<18;

  364. 			int j;

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

  366. 			{

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

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

  369. 			}

  370. 

  371. 			uDest[2*i]= av_clip_uint8(u>>19);

  372. 			uDest[2*i+1]= av_clip_uint8(v>>19);

  373. 		}

  374. 	else

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

  376. 		{

  377. 			int u=1<<18;

  378. 			int v=1<<18;

  379. 			int j;

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

  381. 			{

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

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

  384. 			}

  385. 

  386. 			uDest[2*i]= av_clip_uint8(v>>19);

  387. 			uDest[2*i+1]= av_clip_uint8(u>>19);

  388. 		}

  389. }

  390. 

  391. #define YSCALE_YUV_2_PACKEDX_C(type) \

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

  393. 			int j;\

  394. 			int Y1=1<<18;\

  395. 			int Y2=1<<18;\

  396. 			int U=1<<18;\

  397. 			int V=1<<18;\

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

  399. 			const int i2= 2*i;\

  400. 			\

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

  402. 			{\

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

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

  405. 			}\

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

  407. 			{\

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

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

  410. 			}\

  411. 			Y1>>=19;\

  412. 			Y2>>=19;\

  413. 			U >>=19;\

  414. 			V >>=19;\

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

  416. 			{\

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

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

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

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

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

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

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

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

  425. 			}

  426.                         

  427. #define YSCALE_YUV_2_RGBX_C(type) \

  428. 			YSCALE_YUV_2_PACKEDX_C(type)\

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

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

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

  432. 

  433. #define YSCALE_YUV_2_PACKED2_C \

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

  435. 			const int i2= 2*i;\

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

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

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

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

  440. 

  441. #define YSCALE_YUV_2_RGB2_C(type) \

  442. 			YSCALE_YUV_2_PACKED2_C\

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

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

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

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

  447. 

  448. #define YSCALE_YUV_2_PACKED1_C \

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

  450. 			const int i2= 2*i;\

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

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

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

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

  455. 

  456. #define YSCALE_YUV_2_RGB1_C(type) \

  457. 			YSCALE_YUV_2_PACKED1_C\

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

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

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

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

  462. 

  463. #define YSCALE_YUV_2_PACKED1B_C \

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

  465. 			const int i2= 2*i;\

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

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

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

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

  470. 

  471. #define YSCALE_YUV_2_RGB1B_C(type) \

  472. 			YSCALE_YUV_2_PACKED1B_C\

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

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

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

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

  477. 

  478. #define YSCALE_YUV_2_ANYRGB_C(func, func2)\

  479. 	switch(c->dstFormat)\

  480. 	{\

  481. 	case PIX_FMT_RGB32:\

  482. 	case PIX_FMT_BGR32:\

  483. 		func(uint32_t)\

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

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

  486. 		}		\

  487. 		break;\

  488. 	case PIX_FMT_RGB24:\

  489. 		func(uint8_t)\

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

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

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

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

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

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

  496. 			dest+=6;\

  497. 		}\

  498. 		break;\

  499. 	case PIX_FMT_BGR24:\

  500. 		func(uint8_t)\

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

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

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

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

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

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

  507. 			dest+=6;\

  508. 		}\

  509. 		break;\

  510. 	case PIX_FMT_RGB565:\

  511. 	case PIX_FMT_BGR565:\

  512. 		{\

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

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

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

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

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

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

  519. 			func(uint16_t)\

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

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

  522. 			}\

  523. 		}\

  524. 		break;\

  525. 	case PIX_FMT_RGB555:\

  526. 	case PIX_FMT_BGR555:\

  527. 		{\

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

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

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

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

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

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

  534. 			func(uint16_t)\

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

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

  537. 			}\

  538. 		}\

  539. 		break;\

  540. 	case PIX_FMT_RGB8:\

  541. 	case PIX_FMT_BGR8:\

  542. 		{\

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

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

  545. 			func(uint8_t)\

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

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

  548. 			}\

  549. 		}\

  550. 		break;\

  551. 	case PIX_FMT_RGB4:\

  552. 	case PIX_FMT_BGR4:\

  553. 		{\

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

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

  556. 			func(uint8_t)\

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

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

  559. 			}\

  560. 		}\

  561. 		break;\

  562. 	case PIX_FMT_RGB4_BYTE:\

  563. 	case PIX_FMT_BGR4_BYTE:\

  564. 		{\

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

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

  567. 			func(uint8_t)\

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

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

  570. 			}\

  571. 		}\

  572. 		break;\

  573. 	case PIX_FMT_MONOBLACK:\

  574. 		{\

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

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

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

  578. 				int acc;\

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

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

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

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

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

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

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

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

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

  588. 				dest++;\

  589. 			}\

  590. \

  591. /*\

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

  593. {\

  594. 			int acc=0;\

  595. 			int left=0;\

  596. 			static int top[1024];\

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

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

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

  600. 			int topLeft=0;\

  601. 			int shift=0;\

  602. 			int count=0;\

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

  604. 			int error_new=0;\

  605. 			int error_in3=0;\

  606. 			int f=0;\

  607. 			\

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

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

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

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

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

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

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

  615. \

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

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

  618. 				f= error_new - error_in3*4;\

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

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

  621. \

  622. 				topLeft= top[i];\

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

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

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

  626. \

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

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

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

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

  631. 				}\

  632. 			}\

  633. }\

  634. */\

  635. 		}\

  636. 		break;\

  637. 	case PIX_FMT_YUYV422:\

  638. 		func2\

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

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

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

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

  643. 		}		\

  644. 		break;\

  645. 	case PIX_FMT_UYVY422:\

  646. 		func2\

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

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

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

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

  651. 		}		\

  652. 		break;\

  653. 	}\

  654. 

  655. 

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

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

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

  659. {

  660. 	int i;

  661. 	switch(c->dstFormat)

  662. 	{

  663. 	case PIX_FMT_BGR32:

  664. 	case PIX_FMT_RGB32:

  665. 		YSCALE_YUV_2_RGBX_C(uint32_t)

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

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

  668. 		}

  669. 		break;

  670. 	case PIX_FMT_RGB24:

  671. 		YSCALE_YUV_2_RGBX_C(uint8_t)

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

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

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

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

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

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

  678. 			dest+=6;

  679. 		}

  680. 		break;

  681. 	case PIX_FMT_BGR24:

  682. 		YSCALE_YUV_2_RGBX_C(uint8_t)

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

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

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

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

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

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

  689. 			dest+=6;

  690. 		}

  691. 		break;

  692. 	case PIX_FMT_RGB565:

  693. 	case PIX_FMT_BGR565:

  694. 		{

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

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

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

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

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

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

  701. 			YSCALE_YUV_2_RGBX_C(uint16_t)

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

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

  704. 			}

  705. 		}

  706. 		break;

  707. 	case PIX_FMT_RGB555:

  708. 	case PIX_FMT_BGR555:

  709. 		{

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

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

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

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

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

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

  716. 			YSCALE_YUV_2_RGBX_C(uint16_t)

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

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

  719. 			}

  720. 		}

  721. 		break;

  722. 	case PIX_FMT_RGB8:

  723. 	case PIX_FMT_BGR8:

  724. 		{

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

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

  727. 			YSCALE_YUV_2_RGBX_C(uint8_t)

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

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

  730. 			}

  731. 		}

  732. 		break;

  733. 	case PIX_FMT_RGB4:

  734. 	case PIX_FMT_BGR4:

  735. 		{

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

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

  738. 			YSCALE_YUV_2_RGBX_C(uint8_t)

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

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

  741. 			}

  742. 		}

  743. 		break;

  744. 	case PIX_FMT_RGB4_BYTE:

  745. 	case PIX_FMT_BGR4_BYTE:

  746. 		{

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

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

  749. 			YSCALE_YUV_2_RGBX_C(uint8_t)

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

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

  752. 			}

  753. 		}

  754. 		break;

  755. 	case PIX_FMT_MONOBLACK:

  756. 		{

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

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

  759. 			int acc=0;

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

  761. 				int j;

  762. 				int Y1=1<<18;

  763. 				int Y2=1<<18;

  764. 

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

  766. 				{

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

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

  769. 				}

  770. 				Y1>>=19;

  771. 				Y2>>=19;

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

  773. 				{

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

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

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

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

  778. 				}

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

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

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

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

  783. 					dest++;

  784. 				}

  785. 			}

  786. 		}

  787. 		break;

  788. 	case PIX_FMT_YUYV422:

  789. 		YSCALE_YUV_2_PACKEDX_C(void)

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

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

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

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

  794. 		}

  795.                 break;

  796. 	case PIX_FMT_UYVY422:

  797. 		YSCALE_YUV_2_PACKEDX_C(void)

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

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

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

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

  802. 		}

  803.                 break;

  804. 	}

  805. }

  806. 

  807. 

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

  809. //Plain C versions

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

  811. #define COMPILE_C

  812. #endif

  813. 

  814. #ifdef ARCH_POWERPC

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

  816. #define COMPILE_ALTIVEC

  817. #endif //HAVE_ALTIVEC

  818. #endif //ARCH_POWERPC

  819. 

  820. #if defined(ARCH_X86)

  821. 

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

  823. #define COMPILE_MMX

  824. #endif

  825. 

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

  827. #define COMPILE_MMX2

  828. #endif

  829. 

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

  831. #define COMPILE_3DNOW

  832. #endif

  833. #endif //ARCH_X86 || ARCH_X86_64

  834. 

  835. #undef HAVE_MMX

  836. #undef HAVE_MMX2

  837. #undef HAVE_3DNOW

  838. 

  839. #ifdef COMPILE_C

  840. #undef HAVE_MMX

  841. #undef HAVE_MMX2

  842. #undef HAVE_3DNOW

  843. #undef HAVE_ALTIVEC

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

  845. #include "swscale_template.c"

  846. #endif

  847. 

  848. #ifdef ARCH_POWERPC

  849. #ifdef COMPILE_ALTIVEC

  850. #undef RENAME

  851. #define HAVE_ALTIVEC

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

  853. #include "swscale_template.c"

  854. #endif

  855. #endif //ARCH_POWERPC

  856. 

  857. #if defined(ARCH_X86)

  858. 

  859. //X86 versions

  860. /*

  861. #undef RENAME

  862. #undef HAVE_MMX

  863. #undef HAVE_MMX2

  864. #undef HAVE_3DNOW

  865. #define ARCH_X86

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

  867. #include "swscale_template.c"

  868. */

  869. //MMX versions

  870. #ifdef COMPILE_MMX

  871. #undef RENAME

  872. #define HAVE_MMX

  873. #undef HAVE_MMX2

  874. #undef HAVE_3DNOW

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

  876. #include "swscale_template.c"

  877. #endif

  878. 

  879. //MMX2 versions

  880. #ifdef COMPILE_MMX2

  881. #undef RENAME

  882. #define HAVE_MMX

  883. #define HAVE_MMX2

  884. #undef HAVE_3DNOW

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

  886. #include "swscale_template.c"

  887. #endif

  888. 

  889. //3DNOW versions

  890. #ifdef COMPILE_3DNOW

  891. #undef RENAME

  892. #define HAVE_MMX

  893. #undef HAVE_MMX2

  894. #define HAVE_3DNOW

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

  896. #include "swscale_template.c"

  897. #endif

  898. 

  899. #endif //ARCH_X86 || ARCH_X86_64

  900. 

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

  902. 

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

  904. {

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

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

  907. 	else		return getSplineCoeff(	0.0, 

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

  909. 						        c + 3.0*d,

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

  911. 						dist-1.0);

  912. }

  913. 

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

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

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

  917. {

  918. 	int i;

  919. 	int filterSize;

  920. 	int filter2Size;

  921. 	int minFilterSize;

  922. 	double *filter=NULL;

  923. 	double *filter2=NULL;

  924. #if defined(ARCH_X86)

  925. 	if(flags & SWS_CPU_CAPS_MMX)

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

  927. #endif

  928. 

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

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

  931. 

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

  933. 	{

  934. 		int i;

  935. 		filterSize= 1;

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

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

  938. 

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

  940. 		{

  941. 			filter[i*filterSize]=1;

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

  943. 		}

  944. 

  945. 	}

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

  947. 	{

  948. 		int i;

  949. 		int xDstInSrc;

  950. 		filterSize= 1;

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

  952. 		

  953. 		xDstInSrc= xInc/2 - 0x8000;

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

  955. 		{

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

  957. 

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

  959. 			filter[i]= 1.0;

  960. 			xDstInSrc+= xInc;

  961. 		}

  962. 	}

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

  964. 	{

  965. 		int i;

  966. 		int xDstInSrc;

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

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

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

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

  971. 

  972. 		xDstInSrc= xInc/2 - 0x8000;

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

  974. 		{

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

  976. 			int j;

  977. 

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

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

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

  981. 				{

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

  983. 					double coeff= 1.0 - d;

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

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

  986. 					xx++;

  987. 				}

  988. 			xDstInSrc+= xInc;

  989. 		}

  990. 	}

  991. 	else

  992. 	{

  993. 		double xDstInSrc;

  994. 		double sizeFactor, filterSizeInSrc;

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

  996. 

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

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

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

  1000. 		else if(flags&SWS_GAUSS)	sizeFactor= 8.0;   // infinite ;)

  1001. 		else if(flags&SWS_LANCZOS)	sizeFactor= param[0] != SWS_PARAM_DEFAULT ? 2.0*param[0] : 6.0;

  1002. 		else if(flags&SWS_SINC)		sizeFactor= 20.0; // infinite ;)

  1003. 		else if(flags&SWS_SPLINE)	sizeFactor= 20.0;  // infinite ;)

  1004. 		else if(flags&SWS_BILINEAR)	sizeFactor= 2.0;

  1005. 		else {

  1006. 			sizeFactor= 0.0; //GCC warning killer

  1007. 			ASSERT(0)

  1008. 		}

  1009. 		

  1010. 		if(xInc1 <= 1.0)	filterSizeInSrc= sizeFactor; // upscale

  1011. 		else			filterSizeInSrc= sizeFactor*srcW / (double)dstW;

  1012. 

  1013. 		filterSize= (int)ceil(1 + filterSizeInSrc); // will be reduced later if possible

  1014. 		if(filterSize > srcW-2) filterSize=srcW-2;

  1015. 

  1016. 		filter= av_malloc(dstW*sizeof(double)*filterSize);

  1017. 

  1018. 		xDstInSrc= xInc1 / 2.0 - 0.5;

  1019. 		for(i=0; i<dstW; i++)

  1020. 		{

  1021. 			int xx= (int)(xDstInSrc - (filterSize-1)*0.5 + 0.5);

  1022. 			int j;

  1023. 			(*filterPos)[i]= xx;

  1024. 			for(j=0; j<filterSize; j++)

  1025. 			{

  1026. 				double d= FFABS(xx - xDstInSrc)/filterSizeInSrc*sizeFactor;

  1027. 				double coeff;

  1028. 				if(flags & SWS_BICUBIC)

  1029. 				{

  1030. 					double B= param[0] != SWS_PARAM_DEFAULT ? param[0] : 0.0;

  1031. 					double C= param[1] != SWS_PARAM_DEFAULT ? param[1] : 0.6;

  1032. 

  1033. 					if(d<1.0) 

  1034. 						coeff = (12-9*B-6*C)*d*d*d + (-18+12*B+6*C)*d*d + 6-2*B;

  1035. 					else if(d<2.0)

  1036. 						coeff = (-B-6*C)*d*d*d + (6*B+30*C)*d*d + (-12*B-48*C)*d +8*B+24*C;

  1037. 					else

  1038. 						coeff=0.0;

  1039. 				}

  1040. /*				else if(flags & SWS_X)

  1041. 				{

  1042. 					double p= param ? param*0.01 : 0.3;

  1043. 					coeff = d ? sin(d*PI)/(d*PI) : 1.0;

  1044. 					coeff*= pow(2.0, - p*d*d);

  1045. 				}*/

  1046. 				else if(flags & SWS_X)

  1047. 				{

  1048. 					double A= param[0] != SWS_PARAM_DEFAULT ? param[0] : 1.0;

  1049. 					

  1050. 					if(d<1.0)

  1051. 						coeff = cos(d*PI);

  1052. 					else

  1053. 						coeff=-1.0;

  1054. 					if(coeff<0.0) 	coeff= -pow(-coeff, A);

  1055. 					else		coeff=  pow( coeff, A);

  1056. 					coeff= coeff*0.5 + 0.5;

  1057. 				}

  1058. 				else if(flags & SWS_AREA)

  1059. 				{

  1060. 					double srcPixelSize= 1.0/xInc1;

  1061. 					if(d + srcPixelSize/2 < 0.5) coeff= 1.0;

  1062. 					else if(d - srcPixelSize/2 < 0.5) coeff= (0.5-d)/srcPixelSize + 0.5;

  1063. 					else coeff=0.0;

  1064. 				}

  1065. 				else if(flags & SWS_GAUSS)

  1066. 				{

  1067. 					double p= param[0] != SWS_PARAM_DEFAULT ? param[0] : 3.0;

  1068. 					coeff = pow(2.0, - p*d*d);

  1069. 				}

  1070. 				else if(flags & SWS_SINC)

  1071. 				{

  1072. 					coeff = d ? sin(d*PI)/(d*PI) : 1.0;

  1073. 				}

  1074. 				else if(flags & SWS_LANCZOS)

  1075. 				{

  1076. 					double p= param[0] != SWS_PARAM_DEFAULT ? param[0] : 3.0; 

  1077. 					coeff = d ? sin(d*PI)*sin(d*PI/p)/(d*d*PI*PI/p) : 1.0;

  1078. 					if(d>p) coeff=0;

  1079. 				}

  1080. 				else if(flags & SWS_BILINEAR)

  1081. 				{

  1082. 					coeff= 1.0 - d;

  1083. 					if(coeff<0) coeff=0;

  1084. 				}

  1085. 				else if(flags & SWS_SPLINE)

  1086. 				{

  1087. 					double p=-2.196152422706632;

  1088. 					coeff = getSplineCoeff(1.0, 0.0, p, -p-1.0, d);

  1089. 				}

  1090. 				else {

  1091. 					coeff= 0.0; //GCC warning killer

  1092. 					ASSERT(0)

  1093. 				}

  1094. 

  1095. 				filter[i*filterSize + j]= coeff;

  1096. 				xx++;

  1097. 			}

  1098. 			xDstInSrc+= xInc1;

  1099. 		}

  1100. 	}

  1101. 

  1102. 	/* apply src & dst Filter to filter -> filter2

  1103. 	   av_free(filter);

  1104. 	*/

  1105. 	ASSERT(filterSize>0)

  1106. 	filter2Size= filterSize;

  1107. 	if(srcFilter) filter2Size+= srcFilter->length - 1;

  1108. 	if(dstFilter) filter2Size+= dstFilter->length - 1;

  1109. 	ASSERT(filter2Size>0)

  1110. 	filter2= av_malloc(filter2Size*dstW*sizeof(double));

  1111. 

  1112. 	for(i=0; i<dstW; i++)

  1113. 	{

  1114. 		int j;

  1115. 		SwsVector scaleFilter;

  1116. 		SwsVector *outVec;

  1117. 

  1118. 		scaleFilter.coeff= filter + i*filterSize;

  1119. 		scaleFilter.length= filterSize;

  1120. 

  1121. 		if(srcFilter) outVec= sws_getConvVec(srcFilter, &scaleFilter);

  1122. 		else	      outVec= &scaleFilter;

  1123. 

  1124. 		ASSERT(outVec->length == filter2Size)

  1125. 		//FIXME dstFilter

  1126. 

  1127. 		for(j=0; j<outVec->length; j++)

  1128. 		{

  1129. 			filter2[i*filter2Size + j]= outVec->coeff[j];

  1130. 		}

  1131. 

  1132. 		(*filterPos)[i]+= (filterSize-1)/2 - (filter2Size-1)/2;

  1133. 

  1134. 		if(outVec != &scaleFilter) sws_freeVec(outVec);

  1135. 	}

  1136. 	av_free(filter); filter=NULL;

  1137. 

  1138. 	/* try to reduce the filter-size (step1 find size and shift left) */

  1139. 	// Assume its near normalized (*0.5 or *2.0 is ok but * 0.001 is not)

  1140. 	minFilterSize= 0;

  1141. 	for(i=dstW-1; i>=0; i--)

  1142. 	{

  1143. 		int min= filter2Size;

  1144. 		int j;

  1145. 		double cutOff=0.0;

  1146. 

  1147. 		/* get rid off near zero elements on the left by shifting left */

  1148. 		for(j=0; j<filter2Size; j++)

  1149. 		{

  1150. 			int k;

  1151. 			cutOff += FFABS(filter2[i*filter2Size]);

  1152. 

  1153. 			if(cutOff > SWS_MAX_REDUCE_CUTOFF) break;

  1154. 

  1155. 			/* preserve Monotonicity because the core can't handle the filter otherwise */

  1156. 			if(i<dstW-1 && (*filterPos)[i] >= (*filterPos)[i+1]) break;

  1157. 

  1158. 			// Move filter coeffs left

  1159. 			for(k=1; k<filter2Size; k++)

  1160. 				filter2[i*filter2Size + k - 1]= filter2[i*filter2Size + k];

  1161. 			filter2[i*filter2Size + k - 1]= 0.0;

  1162. 			(*filterPos)[i]++;

  1163. 		}

  1164. 

  1165. 		cutOff=0.0;

  1166. 		/* count near zeros on the right */

  1167. 		for(j=filter2Size-1; j>0; j--)

  1168. 		{

  1169. 			cutOff += FFABS(filter2[i*filter2Size + j]);

  1170. 

  1171. 			if(cutOff > SWS_MAX_REDUCE_CUTOFF) break;

  1172. 			min--;

  1173. 		}

  1174. 

  1175. 		if(min>minFilterSize) minFilterSize= min;

  1176. 	}

  1177. 

  1178.         if (flags & SWS_CPU_CAPS_ALTIVEC) {

  1179.           // we can handle the special case 4,

  1180.           // so we don't want to go to the full 8

  1181.           if (minFilterSize < 5)

  1182.             filterAlign = 4;

  1183. 

  1184.           // we really don't want to waste our time

  1185.           // doing useless computation, so fall-back on

  1186.           // the scalar C code for very small filter.

  1187.           // vectorizing is worth it only if you have

  1188.           // decent-sized vector.

  1189.           if (minFilterSize < 3)

  1190.             filterAlign = 1;

  1191.         }

  1192. 

  1193.         if (flags & SWS_CPU_CAPS_MMX) {

  1194.                 // special case for unscaled vertical filtering

  1195.                 if(minFilterSize == 1 && filterAlign == 2)

  1196.                         filterAlign= 1;

  1197.         }

  1198. 

  1199. 	ASSERT(minFilterSize > 0)

  1200. 	filterSize= (minFilterSize +(filterAlign-1)) & (~(filterAlign-1));

  1201. 	ASSERT(filterSize > 0)

  1202. 	filter= av_malloc(filterSize*dstW*sizeof(double));

  1203.         if(filterSize >= MAX_FILTER_SIZE)

  1204.                 return -1;

  1205. 	*outFilterSize= filterSize;

  1206. 

  1207. 	if(flags&SWS_PRINT_INFO)

  1208. 		av_log(NULL, AV_LOG_VERBOSE, "SwScaler: reducing / aligning filtersize %d -> %d\n", filter2Size, filterSize);

  1209. 	/* try to reduce the filter-size (step2 reduce it) */

  1210. 	for(i=0; i<dstW; i++)

  1211. 	{

  1212. 		int j;

  1213. 

  1214. 		for(j=0; j<filterSize; j++)

  1215. 		{

  1216. 			if(j>=filter2Size) filter[i*filterSize + j]= 0.0;

  1217. 			else		   filter[i*filterSize + j]= filter2[i*filter2Size + j];

  1218. 		}

  1219. 	}

  1220. 	av_free(filter2); filter2=NULL;

  1221. 	

  1222. 

  1223. 	//FIXME try to align filterpos if possible

  1224. 

  1225. 	//fix borders

  1226. 	for(i=0; i<dstW; i++)

  1227. 	{

  1228. 		int j;

  1229. 		if((*filterPos)[i] < 0)

  1230. 		{

  1231. 			// Move filter coeffs left to compensate for filterPos

  1232. 			for(j=1; j<filterSize; j++)

  1233. 			{

  1234. 				int left= FFMAX(j + (*filterPos)[i], 0);

  1235. 				filter[i*filterSize + left] += filter[i*filterSize + j];

  1236. 				filter[i*filterSize + j]=0;

  1237. 			}

  1238. 			(*filterPos)[i]= 0;

  1239. 		}

  1240. 

  1241. 		if((*filterPos)[i] + filterSize > srcW)

  1242. 		{

  1243. 			int shift= (*filterPos)[i] + filterSize - srcW;

  1244. 			// Move filter coeffs right to compensate for filterPos

  1245. 			for(j=filterSize-2; j>=0; j--)

  1246. 			{

  1247. 				int right= FFMIN(j + shift, filterSize-1);

  1248. 				filter[i*filterSize +right] += filter[i*filterSize +j];

  1249. 				filter[i*filterSize +j]=0;

  1250. 			}

  1251. 			(*filterPos)[i]= srcW - filterSize;

  1252. 		}

  1253. 	}

  1254. 

  1255. 	// Note the +1 is for the MMXscaler which reads over the end

  1256. 	/* align at 16 for AltiVec (needed by hScale_altivec_real) */

  1257. 	*outFilter= av_mallocz(*outFilterSize*(dstW+1)*sizeof(int16_t));

  1258. 

  1259. 	/* Normalize & Store in outFilter */

  1260. 	for(i=0; i<dstW; i++)

  1261. 	{

  1262. 		int j;

  1263. 		double error=0;

  1264. 		double sum=0;

  1265. 		double scale= one;

  1266. 

  1267. 		for(j=0; j<filterSize; j++)

  1268. 		{

  1269. 			sum+= filter[i*filterSize + j];

  1270. 		}

  1271. 		scale/= sum;

  1272. 		for(j=0; j<*outFilterSize; j++)

  1273. 		{

  1274. 			double v= filter[i*filterSize + j]*scale + error;

  1275. 			int intV= floor(v + 0.5);

  1276. 			(*outFilter)[i*(*outFilterSize) + j]= intV;

  1277. 			error = v - intV;

  1278. 		}

  1279. 	}

  1280. 	

  1281. 	(*filterPos)[dstW]= (*filterPos)[dstW-1]; // the MMX scaler will read over the end

  1282. 	for(i=0; i<*outFilterSize; i++)

  1283. 	{

  1284. 		int j= dstW*(*outFilterSize);

  1285. 		(*outFilter)[j + i]= (*outFilter)[j + i - (*outFilterSize)];

  1286. 	}

  1287. 

  1288. 	av_free(filter);

  1289.         return 0;

  1290. }

  1291. 

  1292. #ifdef COMPILE_MMX2

  1293. static void initMMX2HScaler(int dstW, int xInc, uint8_t *funnyCode, int16_t *filter, int32_t *filterPos, int numSplits)

  1294. {

  1295. 	uint8_t *fragmentA;

  1296. 	long imm8OfPShufW1A;

  1297. 	long imm8OfPShufW2A;

  1298. 	long fragmentLengthA;

  1299. 	uint8_t *fragmentB;

  1300. 	long imm8OfPShufW1B;

  1301. 	long imm8OfPShufW2B;

  1302. 	long fragmentLengthB;

  1303. 	int fragmentPos;

  1304. 

  1305. 	int xpos, i;

  1306. 

  1307. 	// create an optimized horizontal scaling routine

  1308. 

  1309. 	//code fragment

  1310. 

  1311. 	asm volatile(

  1312. 		"jmp 9f				\n\t"

  1313. 	// Begin

  1314. 		"0:				\n\t"

  1315. 		"movq (%%"REG_d", %%"REG_a"), %%mm3\n\t" 

  1316. 		"movd (%%"REG_c", %%"REG_S"), %%mm0\n\t" 

  1317. 		"movd 1(%%"REG_c", %%"REG_S"), %%mm1\n\t"

  1318. 		"punpcklbw %%mm7, %%mm1		\n\t"

  1319. 		"punpcklbw %%mm7, %%mm0		\n\t"

  1320. 		"pshufw $0xFF, %%mm1, %%mm1	\n\t"

  1321. 		"1:				\n\t"

  1322. 		"pshufw $0xFF, %%mm0, %%mm0	\n\t"

  1323. 		"2:				\n\t"

  1324. 		"psubw %%mm1, %%mm0		\n\t"

  1325. 		"movl 8(%%"REG_b", %%"REG_a"), %%esi\n\t"

  1326. 		"pmullw %%mm3, %%mm0		\n\t"

  1327. 		"psllw $7, %%mm1		\n\t"

  1328. 		"paddw %%mm1, %%mm0		\n\t"

  1329. 

  1330. 		"movq %%mm0, (%%"REG_D", %%"REG_a")\n\t"

  1331. 

  1332. 		"add $8, %%"REG_a"		\n\t"

  1333. 	// End

  1334. 		"9:				\n\t"

  1335. //		"int $3\n\t"

  1336. 		"lea 0b, %0			\n\t"

  1337. 		"lea 1b, %1			\n\t"

  1338. 		"lea 2b, %2			\n\t"

  1339. 		"dec %1				\n\t"

  1340. 		"dec %2				\n\t"

  1341. 		"sub %0, %1			\n\t"

  1342. 		"sub %0, %2			\n\t"

  1343. 		"lea 9b, %3			\n\t"

  1344. 		"sub %0, %3			\n\t"

  1345. 

  1346. 

  1347. 		:"=r" (fragmentA), "=r" (imm8OfPShufW1A), "=r" (imm8OfPShufW2A),

  1348. 		"=r" (fragmentLengthA)

  1349. 	);

  1350. 

  1351. 	asm volatile(

  1352. 		"jmp 9f				\n\t"

  1353. 	// Begin

  1354. 		"0:				\n\t"

  1355. 		"movq (%%"REG_d", %%"REG_a"), %%mm3\n\t" 

  1356. 		"movd (%%"REG_c", %%"REG_S"), %%mm0\n\t" 

  1357. 		"punpcklbw %%mm7, %%mm0		\n\t"

  1358. 		"pshufw $0xFF, %%mm0, %%mm1	\n\t"

  1359. 		"1:				\n\t"

  1360. 		"pshufw $0xFF, %%mm0, %%mm0	\n\t"

  1361. 		"2:				\n\t"

  1362. 		"psubw %%mm1, %%mm0		\n\t"

  1363. 		"movl 8(%%"REG_b", %%"REG_a"), %%esi\n\t"

  1364. 		"pmullw %%mm3, %%mm0		\n\t"

  1365. 		"psllw $7, %%mm1		\n\t"

  1366. 		"paddw %%mm1, %%mm0		\n\t"

  1367. 

  1368. 		"movq %%mm0, (%%"REG_D", %%"REG_a")\n\t"

  1369. 

  1370. 		"add $8, %%"REG_a"		\n\t"

  1371. 	// End

  1372. 		"9:				\n\t"

  1373. //		"int $3\n\t"

  1374. 		"lea 0b, %0			\n\t"

  1375. 		"lea 1b, %1			\n\t"

  1376. 		"lea 2b, %2			\n\t"

  1377. 		"dec %1				\n\t"

  1378. 		"dec %2				\n\t"

  1379. 		"sub %0, %1			\n\t"

  1380. 		"sub %0, %2			\n\t"

  1381. 		"lea 9b, %3			\n\t"

  1382. 		"sub %0, %3			\n\t"

  1383. 

  1384. 

  1385. 		:"=r" (fragmentB), "=r" (imm8OfPShufW1B), "=r" (imm8OfPShufW2B),

  1386. 		"=r" (fragmentLengthB)

  1387. 	);

  1388. 

  1389. 	xpos= 0; //lumXInc/2 - 0x8000; // difference between pixel centers

  1390. 	fragmentPos=0;

  1391. 	

  1392. 	for(i=0; i<dstW/numSplits; i++)

  1393. 	{

  1394. 		int xx=xpos>>16;

  1395. 

  1396. 		if((i&3) == 0)

  1397. 		{

  1398. 			int a=0;

  1399. 			int b=((xpos+xInc)>>16) - xx;

  1400. 			int c=((xpos+xInc*2)>>16) - xx;

  1401. 			int d=((xpos+xInc*3)>>16) - xx;

  1402. 

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

  1404. 			filter[i+1] = (((xpos+xInc  ) & 0xFFFF) ^ 0xFFFF)>>9;

  1405. 			filter[i+2] = (((xpos+xInc*2) & 0xFFFF) ^ 0xFFFF)>>9;

  1406. 			filter[i+3] = (((xpos+xInc*3) & 0xFFFF) ^ 0xFFFF)>>9;

  1407. 			filterPos[i/2]= xx;

  1408. 

  1409. 			if(d+1<4)

  1410. 			{

  1411. 				int maxShift= 3-(d+1);

  1412. 				int shift=0;

  1413. 

  1414. 				memcpy(funnyCode + fragmentPos, fragmentB, fragmentLengthB);

  1415. 

  1416. 				funnyCode[fragmentPos + imm8OfPShufW1B]=

  1417. 					(a+1) | ((b+1)<<2) | ((c+1)<<4) | ((d+1)<<6);

  1418. 				funnyCode[fragmentPos + imm8OfPShufW2B]=

  1419. 					a | (b<<2) | (c<<4) | (d<<6);

  1420. 

  1421. 				if(i+3>=dstW) shift=maxShift; //avoid overread

  1422. 				else if((filterPos[i/2]&3) <= maxShift) shift=filterPos[i/2]&3; //Align

  1423. 

  1424. 				if(shift && i>=shift)

  1425. 				{

  1426. 					funnyCode[fragmentPos + imm8OfPShufW1B]+= 0x55*shift;

  1427. 					funnyCode[fragmentPos + imm8OfPShufW2B]+= 0x55*shift;

  1428. 					filterPos[i/2]-=shift;

  1429. 				}

  1430. 

  1431. 				fragmentPos+= fragmentLengthB;

  1432. 			}

  1433. 			else

  1434. 			{

  1435. 				int maxShift= 3-d;

  1436. 				int shift=0;

  1437. 

  1438. 				memcpy(funnyCode + fragmentPos, fragmentA, fragmentLengthA);

  1439. 

  1440. 				funnyCode[fragmentPos + imm8OfPShufW1A]=

  1441. 				funnyCode[fragmentPos + imm8OfPShufW2A]=

  1442. 					a | (b<<2) | (c<<4) | (d<<6);

  1443. 

  1444. 				if(i+4>=dstW) shift=maxShift; //avoid overread

  1445. 				else if((filterPos[i/2]&3) <= maxShift) shift=filterPos[i/2]&3; //partial align

  1446. 

  1447. 				if(shift && i>=shift)

  1448. 				{

  1449. 					funnyCode[fragmentPos + imm8OfPShufW1A]+= 0x55*shift;

  1450. 					funnyCode[fragmentPos + imm8OfPShufW2A]+= 0x55*shift;

  1451. 					filterPos[i/2]-=shift;

  1452. 				}

  1453. 

  1454. 				fragmentPos+= fragmentLengthA;

  1455. 			}

  1456. 

  1457. 			funnyCode[fragmentPos]= RET;

  1458. 		}

  1459. 		xpos+=xInc;

  1460. 	}

  1461. 	filterPos[i/2]= xpos>>16; // needed to jump to the next part

  1462. }

  1463. #endif /* COMPILE_MMX2 */

  1464. 

  1465. static void globalInit(void){

  1466.     // generating tables:

  1467.     int i;

  1468.     for(i=0; i<768; i++){

  1469. 	int c= av_clip_uint8(i-256);

  1470. 	clip_table[i]=c;

  1471.     }

  1472. }

  1473. 

  1474. static SwsFunc getSwsFunc(int flags){

  1475.     

  1476. #if defined(RUNTIME_CPUDETECT) && defined (CONFIG_GPL)

  1477. #if defined(ARCH_X86)

  1478. 	// ordered per speed fasterst first

  1479. 	if(flags & SWS_CPU_CAPS_MMX2)

  1480. 		return swScale_MMX2;

  1481. 	else if(flags & SWS_CPU_CAPS_3DNOW)

  1482. 		return swScale_3DNow;

  1483. 	else if(flags & SWS_CPU_CAPS_MMX)

  1484. 		return swScale_MMX;

  1485. 	else

  1486. 		return swScale_C;

  1487. 

  1488. #else

  1489. #ifdef ARCH_POWERPC

  1490. 	if(flags & SWS_CPU_CAPS_ALTIVEC)

  1491. 	  return swScale_altivec;

  1492. 	else

  1493. 	  return swScale_C;

  1494. #endif

  1495. 	return swScale_C;

  1496. #endif /* defined(ARCH_X86) */

  1497. #else //RUNTIME_CPUDETECT

  1498. #ifdef HAVE_MMX2

  1499. 	return swScale_MMX2;

  1500. #elif defined (HAVE_3DNOW)

  1501. 	return swScale_3DNow;

  1502. #elif defined (HAVE_MMX)

  1503. 	return swScale_MMX;

  1504. #elif defined (HAVE_ALTIVEC)

  1505. 	return swScale_altivec;

  1506. #else

  1507. 	return swScale_C;

  1508. #endif

  1509. #endif //!RUNTIME_CPUDETECT

  1510. }

  1511. 

  1512. static int PlanarToNV12Wrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1513.              int srcSliceH, uint8_t* dstParam[], int dstStride[]){

  1514. 	uint8_t *dst=dstParam[0] + dstStride[0]*srcSliceY;

  1515. 	/* Copy Y plane */

  1516. 	if(dstStride[0]==srcStride[0] && srcStride[0] > 0)

  1517. 		memcpy(dst, src[0], srcSliceH*dstStride[0]);

  1518. 	else

  1519. 	{

  1520. 		int i;

  1521. 		uint8_t *srcPtr= src[0];

  1522. 		uint8_t *dstPtr= dst;

  1523. 		for(i=0; i<srcSliceH; i++)

  1524. 		{

  1525. 			memcpy(dstPtr, srcPtr, c->srcW);

  1526. 			srcPtr+= srcStride[0];

  1527. 			dstPtr+= dstStride[0];

  1528. 		}

  1529. 	}

  1530. 	dst = dstParam[1] + dstStride[1]*srcSliceY/2;

  1531. 	if (c->dstFormat == PIX_FMT_NV12)

  1532. 		interleaveBytes( src[1],src[2],dst,c->srcW/2,srcSliceH/2,srcStride[1],srcStride[2],dstStride[0] );

  1533. 	else

  1534. 		interleaveBytes( src[2],src[1],dst,c->srcW/2,srcSliceH/2,srcStride[2],srcStride[1],dstStride[0] );

  1535. 

  1536. 	return srcSliceH;

  1537. }

  1538. 

  1539. static int PlanarToYuy2Wrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1540.              int srcSliceH, uint8_t* dstParam[], int dstStride[]){

  1541. 	uint8_t *dst=dstParam[0] + dstStride[0]*srcSliceY;

  1542. 

  1543. 	yv12toyuy2( src[0],src[1],src[2],dst,c->srcW,srcSliceH,srcStride[0],srcStride[1],dstStride[0] );

  1544. 

  1545. 	return srcSliceH;

  1546. }

  1547. 

  1548. static int PlanarToUyvyWrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1549.              int srcSliceH, uint8_t* dstParam[], int dstStride[]){

  1550. 	uint8_t *dst=dstParam[0] + dstStride[0]*srcSliceY;

  1551. 

  1552. 	yv12touyvy( src[0],src[1],src[2],dst,c->srcW,srcSliceH,srcStride[0],srcStride[1],dstStride[0] );

  1553. 

  1554. 	return srcSliceH;

  1555. }

  1556. 

  1557. /* {RGB,BGR}{15,16,24,32} -> {RGB,BGR}{15,16,24,32} */

  1558. static int rgb2rgbWrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1559. 			   int srcSliceH, uint8_t* dst[], int dstStride[]){

  1560. 	const int srcFormat= c->srcFormat;

  1561. 	const int dstFormat= c->dstFormat;

  1562. 	const int srcBpp= (fmt_depth(srcFormat) + 7) >> 3;

  1563. 	const int dstBpp= (fmt_depth(dstFormat) + 7) >> 3;

  1564. 	const int srcId= fmt_depth(srcFormat) >> 2; /* 1:0, 4:1, 8:2, 15:3, 16:4, 24:6, 32:8 */

  1565. 	const int dstId= fmt_depth(dstFormat) >> 2;

  1566. 	void (*conv)(const uint8_t *src, uint8_t *dst, long src_size)=NULL;

  1567. 

  1568. 	/* BGR -> BGR */

  1569. 	if(   (isBGR(srcFormat) && isBGR(dstFormat))

  1570. 	   || (isRGB(srcFormat) && isRGB(dstFormat))){

  1571. 		switch(srcId | (dstId<<4)){

  1572. 		case 0x34: conv= rgb16to15; break;

  1573. 		case 0x36: conv= rgb24to15; break;

  1574. 		case 0x38: conv= rgb32to15; break;

  1575. 		case 0x43: conv= rgb15to16; break;

  1576. 		case 0x46: conv= rgb24to16; break;

  1577. 		case 0x48: conv= rgb32to16; break;

  1578. 		case 0x63: conv= rgb15to24; break;

  1579. 		case 0x64: conv= rgb16to24; break;

  1580. 		case 0x68: conv= rgb32to24; break;

  1581. 		case 0x83: conv= rgb15to32; break;

  1582. 		case 0x84: conv= rgb16to32; break;

  1583. 		case 0x86: conv= rgb24to32; break;

  1584. 		default: av_log(c, AV_LOG_ERROR, "swScaler: internal error %s -> %s converter\n", 

  1585. 				 sws_format_name(srcFormat), sws_format_name(dstFormat)); break;

  1586. 		}

  1587. 	}else if(   (isBGR(srcFormat) && isRGB(dstFormat))

  1588. 		 || (isRGB(srcFormat) && isBGR(dstFormat))){

  1589. 		switch(srcId | (dstId<<4)){

  1590. 		case 0x33: conv= rgb15tobgr15; break;

  1591. 		case 0x34: conv= rgb16tobgr15; break;

  1592. 		case 0x36: conv= rgb24tobgr15; break;

  1593. 		case 0x38: conv= rgb32tobgr15; break;

  1594. 		case 0x43: conv= rgb15tobgr16; break;

  1595. 		case 0x44: conv= rgb16tobgr16; break;

  1596. 		case 0x46: conv= rgb24tobgr16; break;

  1597. 		case 0x48: conv= rgb32tobgr16; break;

  1598. 		case 0x63: conv= rgb15tobgr24; break;

  1599. 		case 0x64: conv= rgb16tobgr24; break;

  1600. 		case 0x66: conv= rgb24tobgr24; break;

  1601. 		case 0x68: conv= rgb32tobgr24; break;

  1602. 		case 0x83: conv= rgb15tobgr32; break;

  1603. 		case 0x84: conv= rgb16tobgr32; break;

  1604. 		case 0x86: conv= rgb24tobgr32; break;

  1605. 		case 0x88: conv= rgb32tobgr32; break;

  1606. 		default: av_log(c, AV_LOG_ERROR, "swScaler: internal error %s -> %s converter\n", 

  1607. 				 sws_format_name(srcFormat), sws_format_name(dstFormat)); break;

  1608. 		}

  1609. 	}else{

  1610. 		av_log(c, AV_LOG_ERROR, "swScaler: internal error %s -> %s converter\n", 

  1611. 			 sws_format_name(srcFormat), sws_format_name(dstFormat));

  1612. 	}

  1613. 

  1614. 	if(dstStride[0]*srcBpp == srcStride[0]*dstBpp)

  1615. 		conv(src[0], dst[0] + dstStride[0]*srcSliceY, srcSliceH*srcStride[0]);

  1616. 	else

  1617. 	{

  1618. 		int i;

  1619. 		uint8_t *srcPtr= src[0];

  1620. 		uint8_t *dstPtr= dst[0] + dstStride[0]*srcSliceY;

  1621. 

  1622. 		for(i=0; i<srcSliceH; i++)

  1623. 		{

  1624. 			conv(srcPtr, dstPtr, c->srcW*srcBpp);

  1625. 			srcPtr+= srcStride[0];

  1626. 			dstPtr+= dstStride[0];

  1627. 		}

  1628. 	}     

  1629. 	return srcSliceH;

  1630. }

  1631. 

  1632. static int bgr24toyv12Wrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1633.              int srcSliceH, uint8_t* dst[], int dstStride[]){

  1634. 

  1635. 	rgb24toyv12(

  1636. 		src[0], 

  1637. 		dst[0]+ srcSliceY    *dstStride[0], 

  1638. 		dst[1]+(srcSliceY>>1)*dstStride[1], 

  1639. 		dst[2]+(srcSliceY>>1)*dstStride[2],

  1640. 		c->srcW, srcSliceH, 

  1641. 		dstStride[0], dstStride[1], srcStride[0]);

  1642. 	return srcSliceH;

  1643. }

  1644. 

  1645. static int yvu9toyv12Wrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1646.              int srcSliceH, uint8_t* dst[], int dstStride[]){

  1647. 	int i;

  1648. 

  1649. 	/* copy Y */

  1650. 	if(srcStride[0]==dstStride[0] && srcStride[0] > 0) 

  1651. 		memcpy(dst[0]+ srcSliceY*dstStride[0], src[0], srcStride[0]*srcSliceH);

  1652. 	else{

  1653. 		uint8_t *srcPtr= src[0];

  1654. 		uint8_t *dstPtr= dst[0] + dstStride[0]*srcSliceY;

  1655. 

  1656. 		for(i=0; i<srcSliceH; i++)

  1657. 		{

  1658. 			memcpy(dstPtr, srcPtr, c->srcW);

  1659. 			srcPtr+= srcStride[0];

  1660. 			dstPtr+= dstStride[0];

  1661. 		}

  1662. 	}

  1663. 

  1664. 	if(c->dstFormat==PIX_FMT_YUV420P){

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

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

  1667. 	}else{

  1668. 		planar2x(src[1], dst[2], c->chrSrcW, c->chrSrcH, srcStride[1], dstStride[2]);

  1669. 		planar2x(src[2], dst[1], c->chrSrcW, c->chrSrcH, srcStride[2], dstStride[1]);

  1670. 	}

  1671. 	return srcSliceH;

  1672. }

  1673. 

  1674. /* unscaled copy like stuff (assumes nearly identical formats) */

  1675. static int simpleCopy(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1676.              int srcSliceH, uint8_t* dst[], int dstStride[]){

  1677. 

  1678. 	if(isPacked(c->srcFormat))

  1679. 	{

  1680. 		if(dstStride[0]==srcStride[0] && srcStride[0] > 0)

  1681. 			memcpy(dst[0] + dstStride[0]*srcSliceY, src[0], srcSliceH*dstStride[0]);

  1682. 		else

  1683. 		{

  1684. 			int i;

  1685. 			uint8_t *srcPtr= src[0];

  1686. 			uint8_t *dstPtr= dst[0] + dstStride[0]*srcSliceY;

  1687. 			int length=0;

  1688. 

  1689. 			/* universal length finder */

  1690. 			while(length+c->srcW <= FFABS(dstStride[0]) 

  1691. 			   && length+c->srcW <= FFABS(srcStride[0])) length+= c->srcW;

  1692. 			ASSERT(length!=0);

  1693. 

  1694. 			for(i=0; i<srcSliceH; i++)

  1695. 			{

  1696. 				memcpy(dstPtr, srcPtr, length);

  1697. 				srcPtr+= srcStride[0];

  1698. 				dstPtr+= dstStride[0];

  1699. 			}

  1700. 		}

  1701. 	}

  1702. 	else 

  1703. 	{ /* Planar YUV or gray */

  1704. 		int plane;

  1705. 		for(plane=0; plane<3; plane++)

  1706. 		{

  1707. 			int length= plane==0 ? c->srcW  : -((-c->srcW  )>>c->chrDstHSubSample);

  1708. 			int y=      plane==0 ? srcSliceY: -((-srcSliceY)>>c->chrDstVSubSample);

  1709. 			int height= plane==0 ? srcSliceH: -((-srcSliceH)>>c->chrDstVSubSample);

  1710. 

  1711. 			if((isGray(c->srcFormat) || isGray(c->dstFormat)) && plane>0)

  1712. 			{

  1713. 				if(!isGray(c->dstFormat))

  1714. 					memset(dst[plane], 128, dstStride[plane]*height);

  1715. 			}

  1716. 			else

  1717. 			{

  1718. 				if(dstStride[plane]==srcStride[plane] && srcStride[plane] > 0)

  1719. 					memcpy(dst[plane] + dstStride[plane]*y, src[plane], height*dstStride[plane]);

  1720. 				else

  1721. 				{

  1722. 					int i;

  1723. 					uint8_t *srcPtr= src[plane];

  1724. 					uint8_t *dstPtr= dst[plane] + dstStride[plane]*y;

  1725. 					for(i=0; i<height; i++)

  1726. 					{

  1727. 						memcpy(dstPtr, srcPtr, length);

  1728. 						srcPtr+= srcStride[plane];

  1729. 						dstPtr+= dstStride[plane];

  1730. 					}

  1731. 				}

  1732. 			}

  1733. 		}

  1734. 	}

  1735. 	return srcSliceH;

  1736. }

  1737. 

  1738. static int gray16togray(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1739.              int srcSliceH, uint8_t* dst[], int dstStride[]){

  1740. 

  1741. 	int length= c->srcW;

  1742. 	int y=      srcSliceY;

  1743. 	int height= srcSliceH;

  1744. 	int i, j;

  1745. 	uint8_t *srcPtr= src[0];

  1746. 	uint8_t *dstPtr= dst[0] + dstStride[0]*y;

  1747. 

  1748. 	if(!isGray(c->dstFormat)){

  1749. 		int height= -((-srcSliceH)>>c->chrDstVSubSample);

  1750. 		memset(dst[1], 128, dstStride[1]*height);

  1751. 		memset(dst[2], 128, dstStride[2]*height);

  1752. 	}

  1753. 	if(c->srcFormat == PIX_FMT_GRAY16LE) srcPtr++;

  1754. 	for(i=0; i<height; i++)

  1755. 	{

  1756. 		for(j=0; j<length; j++) dstPtr[j] = srcPtr[j<<1];

  1757. 		srcPtr+= srcStride[0];

  1758. 		dstPtr+= dstStride[0];

  1759. 	}

  1760. 	return srcSliceH;

  1761. }

  1762. 

  1763. static int graytogray16(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1764.              int srcSliceH, uint8_t* dst[], int dstStride[]){

  1765. 

  1766. 	int length= c->srcW;

  1767. 	int y=      srcSliceY;

  1768. 	int height= srcSliceH;

  1769. 	int i, j;

  1770. 	uint8_t *srcPtr= src[0];

  1771. 	uint8_t *dstPtr= dst[0] + dstStride[0]*y;

  1772. 	for(i=0; i<height; i++)

  1773. 	{

  1774. 		for(j=0; j<length; j++)

  1775. 		{

  1776. 			dstPtr[j<<1] = srcPtr[j];

  1777. 			dstPtr[(j<<1)+1] = srcPtr[j];

  1778. 		}

  1779. 		srcPtr+= srcStride[0];

  1780. 		dstPtr+= dstStride[0];

  1781. 	}

  1782. 	return srcSliceH;

  1783. }

  1784. 

  1785. static int gray16swap(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1786.              int srcSliceH, uint8_t* dst[], int dstStride[]){

  1787. 

  1788. 	int length= c->srcW;

  1789. 	int y=      srcSliceY;

  1790. 	int height= srcSliceH;

  1791. 	int i, j;

  1792. 	uint16_t *srcPtr= src[0];

  1793. 	uint16_t *dstPtr= dst[0] + dstStride[0]*y/2;

  1794. 	for(i=0; i<height; i++)

  1795. 	{

  1796. 		for(j=0; j<length; j++) dstPtr[j] = bswap_16(srcPtr[j]);

  1797. 		srcPtr+= srcStride[0]/2;

  1798. 		dstPtr+= dstStride[0]/2;

  1799. 	}

  1800. 	return srcSliceH;

  1801. }

  1802. 

  1803. 

  1804. static void getSubSampleFactors(int *h, int *v, int format){

  1805. 	switch(format){

  1806. 	case PIX_FMT_UYVY422:

  1807. 	case PIX_FMT_YUYV422:

  1808. 		*h=1;

  1809. 		*v=0;

  1810. 		break;

  1811. 	case PIX_FMT_YUV420P:

  1812. 	case PIX_FMT_GRAY16BE:

  1813. 	case PIX_FMT_GRAY16LE:

  1814. 	case PIX_FMT_GRAY8: //FIXME remove after different subsamplings are fully implemented

  1815. 	case PIX_FMT_NV12:

  1816. 	case PIX_FMT_NV21:

  1817. 		*h=1;

  1818. 		*v=1;

  1819. 		break;

  1820. 	case PIX_FMT_YUV410P:

  1821. 		*h=2;

  1822. 		*v=2;

  1823. 		break;

  1824. 	case PIX_FMT_YUV444P:

  1825. 		*h=0;

  1826. 		*v=0;

  1827. 		break;

  1828. 	case PIX_FMT_YUV422P:

  1829. 		*h=1;

  1830. 		*v=0;

  1831. 		break;

  1832. 	case PIX_FMT_YUV411P:

  1833. 		*h=2;

  1834. 		*v=0;

  1835. 		break;

  1836. 	default:

  1837. 		*h=0;

  1838. 		*v=0;

  1839. 		break;

  1840. 	}

  1841. }

  1842. 

  1843. static uint16_t roundToInt16(int64_t f){

  1844. 	int r= (f + (1<<15))>>16;

  1845. 	     if(r<-0x7FFF) return 0x8000;

  1846. 	else if(r> 0x7FFF) return 0x7FFF;

  1847. 	else               return r;

  1848. }

  1849. 

  1850. /**

  1851.  * @param inv_table the yuv2rgb coeffs, normally Inverse_Table_6_9[x]

  1852.  * @param fullRange if 1 then the luma range is 0..255 if 0 its 16..235

  1853.  * @return -1 if not supported

  1854.  */

  1855. int sws_setColorspaceDetails(SwsContext *c, const int inv_table[4], int srcRange, const int table[4], int dstRange, int brightness, int contrast, int saturation){

  1856. 	int64_t crv =  inv_table[0];

  1857. 	int64_t cbu =  inv_table[1];

  1858. 	int64_t cgu = -inv_table[2];

  1859. 	int64_t cgv = -inv_table[3];

  1860. 	int64_t cy  = 1<<16;

  1861. 	int64_t oy  = 0;

  1862. 

  1863. 	if(isYUV(c->dstFormat) || isGray(c->dstFormat)) return -1;

  1864. 	memcpy(c->srcColorspaceTable, inv_table, sizeof(int)*4);

  1865. 	memcpy(c->dstColorspaceTable,     table, sizeof(int)*4);

  1866. 

  1867. 	c->brightness= brightness;

  1868. 	c->contrast  = contrast;

  1869. 	c->saturation= saturation;

  1870. 	c->srcRange  = srcRange;

  1871. 	c->dstRange  = dstRange;

  1872. 

  1873. 	c->uOffset=   0x0400040004000400LL;

  1874. 	c->vOffset=   0x0400040004000400LL;

  1875. 

  1876. 	if(!srcRange){

  1877. 		cy= (cy*255) / 219;

  1878. 		oy= 16<<16;

  1879. 	}else{

  1880.                 crv= (crv*224) / 255;

  1881.                 cbu= (cbu*224) / 255;

  1882.                 cgu= (cgu*224) / 255;

  1883.                 cgv= (cgv*224) / 255;

  1884.         }

  1885. 

  1886. 	cy = (cy *contrast             )>>16;

  1887. 	crv= (crv*contrast * saturation)>>32;

  1888. 	cbu= (cbu*contrast * saturation)>>32;

  1889. 	cgu= (cgu*contrast * saturation)>>32;

  1890. 	cgv= (cgv*contrast * saturation)>>32;

  1891. 

  1892. 	oy -= 256*brightness;

  1893. 

  1894. 	c->yCoeff=    roundToInt16(cy *8192) * 0x0001000100010001ULL;

  1895. 	c->vrCoeff=   roundToInt16(crv*8192) * 0x0001000100010001ULL;

  1896. 	c->ubCoeff=   roundToInt16(cbu*8192) * 0x0001000100010001ULL;

  1897. 	c->vgCoeff=   roundToInt16(cgv*8192) * 0x0001000100010001ULL;

  1898. 	c->ugCoeff=   roundToInt16(cgu*8192) * 0x0001000100010001ULL;

  1899. 	c->yOffset=   roundToInt16(oy *   8) * 0x0001000100010001ULL;

  1900. 

  1901. 	yuv2rgb_c_init_tables(c, inv_table, srcRange, brightness, contrast, saturation);

  1902. 	//FIXME factorize

  1903. 

  1904. #ifdef COMPILE_ALTIVEC

  1905. 	if (c->flags & SWS_CPU_CAPS_ALTIVEC)

  1906. 	    yuv2rgb_altivec_init_tables (c, inv_table, brightness, contrast, saturation);

  1907. #endif	

  1908. 	return 0;

  1909. }

  1910. 

  1911. /**

  1912.  * @return -1 if not supported

  1913.  */

  1914. int sws_getColorspaceDetails(SwsContext *c, int **inv_table, int *srcRange, int **table, int *dstRange, int *brightness, int *contrast, int *saturation){

  1915. 	if(isYUV(c->dstFormat) || isGray(c->dstFormat)) return -1;

  1916. 

  1917. 	*inv_table = c->srcColorspaceTable;

  1918. 	*table     = c->dstColorspaceTable;

  1919. 	*srcRange  = c->srcRange;

  1920. 	*dstRange  = c->dstRange;

  1921. 	*brightness= c->brightness;

  1922. 	*contrast  = c->contrast;

  1923. 	*saturation= c->saturation;

  1924. 	

  1925. 	return 0;	

  1926. }

  1927. 

  1928. static int handle_jpeg(int *format)

  1929. {

  1930. 	switch (*format) {

  1931. 		case PIX_FMT_YUVJ420P:

  1932. 			*format = PIX_FMT_YUV420P;

  1933. 			return 1;

  1934. 		case PIX_FMT_YUVJ422P:

  1935. 			*format = PIX_FMT_YUV422P;

  1936. 			return 1;

  1937. 		case PIX_FMT_YUVJ444P:

  1938. 			*format = PIX_FMT_YUV444P;

  1939. 			return 1;

  1940. 		default:

  1941. 			return 0;

  1942. 	}

  1943. }

  1944. 

  1945. SwsContext *sws_getContext(int srcW, int srcH, int srcFormat, int dstW, int dstH, int dstFormat, int flags,

  1946.                          SwsFilter *srcFilter, SwsFilter *dstFilter, double *param){

  1947. 

  1948. 	SwsContext *c;

  1949. 	int i;

  1950. 	int usesVFilter, usesHFilter;

  1951. 	int unscaled, needsDither;

  1952. 	int srcRange, dstRange;

  1953. 	SwsFilter dummyFilter= {NULL, NULL, NULL, NULL};

  1954. #if defined(ARCH_X86)

  1955. 	if(flags & SWS_CPU_CAPS_MMX)

  1956. 		asm volatile("emms\n\t"::: "memory");

  1957. #endif

  1958. 

  1959. #if !defined(RUNTIME_CPUDETECT) || !defined (CONFIG_GPL) //ensure that the flags match the compiled variant if cpudetect is off

  1960. 	flags &= ~(SWS_CPU_CAPS_MMX|SWS_CPU_CAPS_MMX2|SWS_CPU_CAPS_3DNOW|SWS_CPU_CAPS_ALTIVEC);

  1961. #ifdef HAVE_MMX2

  1962. 	flags |= SWS_CPU_CAPS_MMX|SWS_CPU_CAPS_MMX2;

  1963. #elif defined (HAVE_3DNOW)

  1964. 	flags |= SWS_CPU_CAPS_MMX|SWS_CPU_CAPS_3DNOW;

  1965. #elif defined (HAVE_MMX)

  1966. 	flags |= SWS_CPU_CAPS_MMX;

  1967. #elif defined (HAVE_ALTIVEC)

  1968. 	flags |= SWS_CPU_CAPS_ALTIVEC;

  1969. #endif

  1970. #endif /* RUNTIME_CPUDETECT */

  1971. 	if(clip_table[512] != 255) globalInit();

  1972. 	if(rgb15to16 == NULL) sws_rgb2rgb_init(flags);

  1973. 

  1974. 	unscaled = (srcW == dstW && srcH == dstH);

  1975. 	needsDither= (isBGR(dstFormat) || isRGB(dstFormat)) 

  1976. 		     && (fmt_depth(dstFormat))<24

  1977. 		     && ((fmt_depth(dstFormat))<(fmt_depth(srcFormat)) || (!(isRGB(srcFormat) || isBGR(srcFormat))));

  1978. 

  1979. 	srcRange = handle_jpeg(&srcFormat);

  1980. 	dstRange = handle_jpeg(&dstFormat);

  1981. 

  1982. 	if(!isSupportedIn(srcFormat)) 

  1983. 	{

  1984. 		av_log(NULL, AV_LOG_ERROR, "swScaler: %s is not supported as input format\n", sws_format_name(srcFormat));

  1985. 		return NULL;

  1986. 	}

  1987. 	if(!isSupportedOut(dstFormat))

  1988. 	{

  1989. 		av_log(NULL, AV_LOG_ERROR, "swScaler: %s is not supported as output format\n", sws_format_name(dstFormat));

  1990. 		return NULL;

  1991. 	}

  1992. 

  1993. 	/* sanity check */

  1994. 	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

  1995. 	{

  1996. 		 av_log(NULL, AV_LOG_ERROR, "swScaler: %dx%d -> %dx%d is invalid scaling dimension\n", 

  1997. 			srcW, srcH, dstW, dstH);

  1998. 		return NULL;

  1999. 	}

  2000. 

  2001. 	if(!dstFilter) dstFilter= &dummyFilter;

  2002. 	if(!srcFilter) srcFilter= &dummyFilter;

  2003. 

  2004. 	c= av_mallocz(sizeof(SwsContext));

  2005. 

  2006. 	c->av_class = &sws_context_class;

  2007. 	c->srcW= srcW;

  2008. 	c->srcH= srcH;

  2009. 	c->dstW= dstW;

  2010. 	c->dstH= dstH;

  2011. 	c->lumXInc= ((srcW<<16) + (dstW>>1))/dstW;

  2012. 	c->lumYInc= ((srcH<<16) + (dstH>>1))/dstH;

  2013. 	c->flags= flags;

  2014. 	c->dstFormat= dstFormat;

  2015. 	c->srcFormat= srcFormat;

  2016.         c->vRounder= 4* 0x0001000100010001ULL;

  2017. 

  2018. 	usesHFilter= usesVFilter= 0;

  2019. 	if(dstFilter->lumV!=NULL && dstFilter->lumV->length>1) usesVFilter=1;

  2020. 	if(dstFilter->lumH!=NULL && dstFilter->lumH->length>1) usesHFilter=1;

  2021. 	if(dstFilter->chrV!=NULL && dstFilter->chrV->length>1) usesVFilter=1;

  2022. 	if(dstFilter->chrH!=NULL && dstFilter->chrH->length>1) usesHFilter=1;

  2023. 	if(srcFilter->lumV!=NULL && srcFilter->lumV->length>1) usesVFilter=1;

  2024. 	if(srcFilter->lumH!=NULL && srcFilter->lumH->length>1) usesHFilter=1;

  2025. 	if(srcFilter->chrV!=NULL && srcFilter->chrV->length>1) usesVFilter=1;

  2026. 	if(srcFilter->chrH!=NULL && srcFilter->chrH->length>1) usesHFilter=1;

  2027. 

  2028. 	getSubSampleFactors(&c->chrSrcHSubSample, &c->chrSrcVSubSample, srcFormat);

  2029. 	getSubSampleFactors(&c->chrDstHSubSample, &c->chrDstVSubSample, dstFormat);

  2030. 

  2031. 	// reuse chroma for 2 pixles rgb/bgr unless user wants full chroma interpolation

  2032. 	if((isBGR(dstFormat) || isRGB(dstFormat)) && !(flags&SWS_FULL_CHR_H_INT)) c->chrDstHSubSample=1;

  2033. 

  2034. 	// drop some chroma lines if the user wants it

  2035. 	c->vChrDrop= (flags&SWS_SRC_V_CHR_DROP_MASK)>>SWS_SRC_V_CHR_DROP_SHIFT;

  2036. 	c->chrSrcVSubSample+= c->vChrDrop;

  2037. 

  2038. 	// drop every 2. pixel for chroma calculation unless user wants full chroma

  2039. 	if((isBGR(srcFormat) || isRGB(srcFormat)) && !(flags&SWS_FULL_CHR_H_INP)

  2040.            && srcFormat!=PIX_FMT_RGB8      && srcFormat!=PIX_FMT_BGR8

  2041.            && srcFormat!=PIX_FMT_RGB4      && srcFormat!=PIX_FMT_BGR4

  2042.            && srcFormat!=PIX_FMT_RGB4_BYTE && srcFormat!=PIX_FMT_BGR4_BYTE)

  2043. 		c->chrSrcHSubSample=1;

  2044. 

  2045. 	if(param){

  2046. 		c->param[0] = param[0];

  2047. 		c->param[1] = param[1];

  2048. 	}else{

  2049. 		c->param[0] =

  2050. 		c->param[1] = SWS_PARAM_DEFAULT;

  2051. 	}

  2052. 

  2053. 	c->chrIntHSubSample= c->chrDstHSubSample;

  2054. 	c->chrIntVSubSample= c->chrSrcVSubSample;

  2055. 

  2056. 	// Note the -((-x)>>y) is so that we always round toward +inf.

  2057. 	c->chrSrcW= -((-srcW) >> c->chrSrcHSubSample);

  2058. 	c->chrSrcH= -((-srcH) >> c->chrSrcVSubSample);

  2059. 	c->chrDstW= -((-dstW) >> c->chrDstHSubSample);

  2060. 	c->chrDstH= -((-dstH) >> c->chrDstVSubSample);

  2061. 

  2062. 	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); 

  2063. 

  2064. 	/* unscaled special Cases */

  2065. 	if(unscaled && !usesHFilter && !usesVFilter)

  2066. 	{

  2067. 		/* yv12_to_nv12 */

  2068. 		if(srcFormat == PIX_FMT_YUV420P && (dstFormat == PIX_FMT_NV12 || dstFormat == PIX_FMT_NV21))

  2069. 		{

  2070. 			c->swScale= PlanarToNV12Wrapper;

  2071. 		}

  2072. #ifdef CONFIG_GPL

  2073. 		/* yuv2bgr */

  2074. 		if((srcFormat==PIX_FMT_YUV420P || srcFormat==PIX_FMT_YUV422P) && (isBGR(dstFormat) || isRGB(dstFormat)))

  2075. 		{

  2076. 			c->swScale= yuv2rgb_get_func_ptr(c);

  2077. 		}

  2078. #endif

  2079. 		

  2080. 		if( srcFormat==PIX_FMT_YUV410P && dstFormat==PIX_FMT_YUV420P )

  2081. 		{

  2082. 			c->swScale= yvu9toyv12Wrapper;

  2083. 		}

  2084. 

  2085. 		/* bgr24toYV12 */

  2086. 		if(srcFormat==PIX_FMT_BGR24 && dstFormat==PIX_FMT_YUV420P)

  2087. 			c->swScale= bgr24toyv12Wrapper;

  2088. 		

  2089. 		/* rgb/bgr -> rgb/bgr (no dither needed forms) */

  2090. 		if(   (isBGR(srcFormat) || isRGB(srcFormat))

  2091. 		   && (isBGR(dstFormat) || isRGB(dstFormat)) 

  2092. 		   && srcFormat != PIX_FMT_BGR8 && dstFormat != PIX_FMT_BGR8

  2093. 		   && srcFormat != PIX_FMT_RGB8 && dstFormat != PIX_FMT_RGB8

  2094. 		   && srcFormat != PIX_FMT_BGR4 && dstFormat != PIX_FMT_BGR4

  2095. 		   && srcFormat != PIX_FMT_RGB4 && dstFormat != PIX_FMT_RGB4

  2096. 		   && srcFormat != PIX_FMT_BGR4_BYTE && dstFormat != PIX_FMT_BGR4_BYTE

  2097. 		   && srcFormat != PIX_FMT_RGB4_BYTE && dstFormat != PIX_FMT_RGB4_BYTE

  2098. 		   && srcFormat != PIX_FMT_MONOBLACK && dstFormat != PIX_FMT_MONOBLACK

  2099. 		   && !needsDither)

  2100. 			c->swScale= rgb2rgbWrapper;

  2101. 

  2102. 		/* LQ converters if -sws 0 or -sws 4*/

  2103. 		if(c->flags&(SWS_FAST_BILINEAR|SWS_POINT)){

  2104. 			/* rgb/bgr -> rgb/bgr (dither needed forms) */

  2105. 			if(  (isBGR(srcFormat) || isRGB(srcFormat))

  2106. 			  && (isBGR(dstFormat) || isRGB(dstFormat)) 

  2107. 			  && needsDither)

  2108. 				c->swScale= rgb2rgbWrapper;

  2109. 

  2110. 			/* yv12_to_yuy2 */

  2111. 			if(srcFormat == PIX_FMT_YUV420P && 

  2112. 			    (dstFormat == PIX_FMT_YUYV422 || dstFormat == PIX_FMT_UYVY422))

  2113. 			{

  2114. 				if (dstFormat == PIX_FMT_YUYV422)

  2115. 				    c->swScale= PlanarToYuy2Wrapper;

  2116. 				else

  2117. 				    c->swScale= PlanarToUyvyWrapper;

  2118. 			}

  2119. 		}

  2120. 

  2121. #ifdef COMPILE_ALTIVEC

  2122. 		if ((c->flags & SWS_CPU_CAPS_ALTIVEC) &&

  2123. 		    ((srcFormat == PIX_FMT_YUV420P && 

  2124. 		      (dstFormat == PIX_FMT_YUYV422 || dstFormat == PIX_FMT_UYVY422)))) {

  2125. 		  // unscaled YV12 -> packed YUV, we want speed

  2126. 		  if (dstFormat == PIX_FMT_YUYV422)

  2127. 		    c->swScale= yv12toyuy2_unscaled_altivec;

  2128. 		  else

  2129. 		    c->swScale= yv12touyvy_unscaled_altivec;

  2130. 		}

  2131. #endif

  2132. 

  2133. 		/* simple copy */

  2134. 		if(   srcFormat == dstFormat

  2135. 		   || (isPlanarYUV(srcFormat) && isGray(dstFormat))

  2136. 		   || (isPlanarYUV(dstFormat) && isGray(srcFormat))

  2137. 		  )

  2138. 		{

  2139. 			c->swScale= simpleCopy;

  2140. 		}

  2141. 

  2142. 		/* gray16{le,be} conversions */

  2143. 		if(isGray16(srcFormat) && (isPlanarYUV(dstFormat) || (dstFormat == PIX_FMT_GRAY8)))

  2144. 		{

  2145. 			c->swScale= gray16togray;

  2146. 		}

  2147. 		if((isPlanarYUV(srcFormat) || (srcFormat == PIX_FMT_GRAY8)) && isGray16(dstFormat))

  2148. 		{

  2149. 			c->swScale= graytogray16;

  2150. 		}

  2151. 		if(srcFormat != dstFormat && isGray16(srcFormat) && isGray16(dstFormat))

  2152. 		{

  2153. 			c->swScale= gray16swap;

  2154. 		}		

  2155. 

  2156. 		if(c->swScale){

  2157. 			if(flags&SWS_PRINT_INFO)

  2158. 				av_log(c, AV_LOG_INFO, "SwScaler: using unscaled %s -> %s special converter\n", 

  2159. 					sws_format_name(srcFormat), sws_format_name(dstFormat));

  2160. 			return c;

  2161. 		}

  2162. 	}

  2163. 

  2164. 	if(flags & SWS_CPU_CAPS_MMX2)

  2165. 	{

  2166. 		c->canMMX2BeUsed= (dstW >=srcW && (dstW&31)==0 && (srcW&15)==0) ? 1 : 0;

  2167. 		if(!c->canMMX2BeUsed && dstW >=srcW && (srcW&15)==0 && (flags&SWS_FAST_BILINEAR))

  2168. 		{

  2169. 			if(flags&SWS_PRINT_INFO)

  2170. 				av_log(c, AV_LOG_INFO, "SwScaler: output Width is not a multiple of 32 -> no MMX2 scaler\n");

  2171. 		}

  2172. 		if(usesHFilter) c->canMMX2BeUsed=0;

  2173. 	}

  2174. 	else

  2175. 		c->canMMX2BeUsed=0;

  2176. 

  2177. 	c->chrXInc= ((c->chrSrcW<<16) + (c->chrDstW>>1))/c->chrDstW;

  2178. 	c->chrYInc= ((c->chrSrcH<<16) + (c->chrDstH>>1))/c->chrDstH;

  2179. 

  2180. 	// match pixel 0 of the src to pixel 0 of dst and match pixel n-2 of src to pixel n-2 of dst

  2181. 	// but only for the FAST_BILINEAR mode otherwise do correct scaling

  2182. 	// n-2 is the last chrominance sample available

  2183. 	// this is not perfect, but noone shuld notice the difference, the more correct variant

  2184. 	// would be like the vertical one, but that would require some special code for the

  2185. 	// first and last pixel

  2186. 	if(flags&SWS_FAST_BILINEAR)

  2187. 	{

  2188. 		if(c->canMMX2BeUsed)

  2189. 		{

  2190. 			c->lumXInc+= 20;

  2191. 			c->chrXInc+= 20;

  2192. 		}

  2193. 		//we don't use the x86asm scaler if mmx is available

  2194. 		else if(flags & SWS_CPU_CAPS_MMX)

  2195. 		{

  2196. 			c->lumXInc = ((srcW-2)<<16)/(dstW-2) - 20;

  2197. 			c->chrXInc = ((c->chrSrcW-2)<<16)/(c->chrDstW-2) - 20;

  2198. 		}

  2199. 	}

  2200. 

  2201. 	/* precalculate horizontal scaler filter coefficients */

  2202. 	{

  2203. 		const int filterAlign=

  2204. 		  (flags & SWS_CPU_CAPS_MMX) ? 4 :

  2205. 		  (flags & SWS_CPU_CAPS_ALTIVEC) ? 8 :

  2206. 		  1;

  2207. 

  2208. 		initFilter(&c->hLumFilter, &c->hLumFilterPos, &c->hLumFilterSize, c->lumXInc,

  2209. 				 srcW      ,       dstW, filterAlign, 1<<14,

  2210. 				 (flags&SWS_BICUBLIN) ? (flags|SWS_BICUBIC)  : flags,

  2211. 				 srcFilter->lumH, dstFilter->lumH, c->param);

  2212. 		initFilter(&c->hChrFilter, &c->hChrFilterPos, &c->hChrFilterSize, c->chrXInc,

  2213. 				 c->chrSrcW, c->chrDstW, filterAlign, 1<<14,

  2214. 				 (flags&SWS_BICUBLIN) ? (flags|SWS_BILINEAR) : flags,

  2215. 				 srcFilter->chrH, dstFilter->chrH, c->param);

  2216. 

  2217. #define MAX_FUNNY_CODE_SIZE 10000

  2218. #if defined(COMPILE_MMX2)

  2219. // can't downscale !!!

  2220. 		if(c->canMMX2BeUsed && (flags & SWS_FAST_BILINEAR))

  2221. 		{

  2222. #ifdef MAP_ANONYMOUS

  2223. 			c->funnyYCode = (uint8_t*)mmap(NULL, MAX_FUNNY_CODE_SIZE, PROT_EXEC | PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, 0, 0);

  2224. 			c->funnyUVCode = (uint8_t*)mmap(NULL, MAX_FUNNY_CODE_SIZE, PROT_EXEC | PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, 0, 0);

  2225. #else

  2226. 			c->funnyYCode = av_malloc(MAX_FUNNY_CODE_SIZE);

  2227. 			c->funnyUVCode = av_malloc(MAX_FUNNY_CODE_SIZE);

  2228. #endif

  2229. 

  2230. 			c->lumMmx2Filter   = av_malloc((dstW        /8+8)*sizeof(int16_t));

  2231. 			c->chrMmx2Filter   = av_malloc((c->chrDstW  /4+8)*sizeof(int16_t));

  2232. 			c->lumMmx2FilterPos= av_malloc((dstW      /2/8+8)*sizeof(int32_t));

  2233. 			c->chrMmx2FilterPos= av_malloc((c->chrDstW/2/4+8)*sizeof(int32_t));

  2234. 

  2235. 			initMMX2HScaler(      dstW, c->lumXInc, c->funnyYCode , c->lumMmx2Filter, c->lumMmx2FilterPos, 8);

  2236. 			initMMX2HScaler(c->chrDstW, c->chrXInc, c->funnyUVCode, c->chrMmx2Filter, c->chrMmx2FilterPos, 4);

  2237. 		}

  2238. #endif /* defined(COMPILE_MMX2) */

  2239. 	} // Init Horizontal stuff

  2240. 

  2241. 

  2242. 

  2243. 	/* precalculate vertical scaler filter coefficients */

  2244. 	{

  2245. 		const int filterAlign=

  2246. 		  (flags & SWS_CPU_CAPS_MMX) && (flags & SWS_ACCURATE_RND) ? 2 :

  2247. 		  (flags & SWS_CPU_CAPS_ALTIVEC) ? 8 :

  2248. 		  1;

  2249. 

  2250. 		initFilter(&c->vLumFilter, &c->vLumFilterPos, &c->vLumFilterSize, c->lumYInc,

  2251. 				srcH      ,        dstH, filterAlign, (1<<12)-4,

  2252. 				(flags&SWS_BICUBLIN) ? (flags|SWS_BICUBIC)  : flags,

  2253. 				srcFilter->lumV, dstFilter->lumV, c->param);

  2254. 		initFilter(&c->vChrFilter, &c->vChrFilterPos, &c->vChrFilterSize, c->chrYInc,

  2255. 				c->chrSrcH, c->chrDstH, filterAlign, (1<<12)-4,

  2256. 				(flags&SWS_BICUBLIN) ? (flags|SWS_BILINEAR) : flags,

  2257. 				srcFilter->chrV, dstFilter->chrV, c->param);

  2258. 

  2259. #ifdef HAVE_ALTIVEC

  2260. 		c->vYCoeffsBank = av_malloc(sizeof (vector signed short)*c->vLumFilterSize*c->dstH);

  2261. 		c->vCCoeffsBank = av_malloc(sizeof (vector signed short)*c->vChrFilterSize*c->chrDstH);

  2262. 

  2263. 		for (i=0;i<c->vLumFilterSize*c->dstH;i++) {

  2264.                   int j;

  2265. 		  short *p = (short *)&c->vYCoeffsBank[i];

  2266. 		  for (j=0;j<8;j++)

  2267. 		    p[j] = c->vLumFilter[i];

  2268. 		}

  2269. 

  2270. 		for (i=0;i<c->vChrFilterSize*c->chrDstH;i++) {

  2271.                   int j;

  2272. 		  short *p = (short *)&c->vCCoeffsBank[i];

  2273. 		  for (j=0;j<8;j++)

  2274. 		    p[j] = c->vChrFilter[i];

  2275. 		}

  2276. #endif

  2277. 	}

  2278. 

  2279. 	// Calculate Buffer Sizes so that they won't run out while handling these damn slices

  2280. 	c->vLumBufSize= c->vLumFilterSize;

  2281. 	c->vChrBufSize= c->vChrFilterSize;

  2282. 	for(i=0; i<dstH; i++)

  2283. 	{

  2284. 		int chrI= i*c->chrDstH / dstH;

  2285. 		int nextSlice= FFMAX(c->vLumFilterPos[i   ] + c->vLumFilterSize - 1,

  2286. 				 ((c->vChrFilterPos[chrI] + c->vChrFilterSize - 1)<<c->chrSrcVSubSample));

  2287. 

  2288. 		nextSlice>>= c->chrSrcVSubSample;

  2289. 		nextSlice<<= c->chrSrcVSubSample;

  2290. 		if(c->vLumFilterPos[i   ] + c->vLumBufSize < nextSlice)

  2291. 			c->vLumBufSize= nextSlice - c->vLumFilterPos[i   ];

  2292. 		if(c->vChrFilterPos[chrI] + c->vChrBufSize < (nextSlice>>c->chrSrcVSubSample))

  2293. 			c->vChrBufSize= (nextSlice>>c->chrSrcVSubSample) - c->vChrFilterPos[chrI];

  2294. 	}

  2295. 

  2296. 	// allocate pixbufs (we use dynamic allocation because otherwise we would need to

  2297. 	c->lumPixBuf= av_malloc(c->vLumBufSize*2*sizeof(int16_t*));

  2298. 	c->chrPixBuf= av_malloc(c->vChrBufSize*2*sizeof(int16_t*));

  2299. 	//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)

  2300. 	/* align at 16 bytes for AltiVec */

  2301. 	for(i=0; i<c->vLumBufSize; i++)

  2302. 		c->lumPixBuf[i]= c->lumPixBuf[i+c->vLumBufSize]= av_mallocz(4000);

  2303. 	for(i=0; i<c->vChrBufSize; i++)

  2304. 		c->chrPixBuf[i]= c->chrPixBuf[i+c->vChrBufSize]= av_malloc(8000);

  2305. 

  2306. 	//try to avoid drawing green stuff between the right end and the stride end

  2307. 	for(i=0; i<c->vChrBufSize; i++) memset(c->chrPixBuf[i], 64, 8000);

  2308. 

  2309. 	ASSERT(c->chrDstH <= dstH)

  2310. 

  2311. 	if(flags&SWS_PRINT_INFO)

  2312. 	{

  2313. #ifdef DITHER1XBPP

  2314. 		char *dither= " dithered";

  2315. #else

  2316. 		char *dither= "";

  2317. #endif

  2318. 		if(flags&SWS_FAST_BILINEAR)

  2319. 			av_log(c, AV_LOG_INFO, "SwScaler: FAST_BILINEAR scaler, ");

  2320. 		else if(flags&SWS_BILINEAR)

  2321. 			av_log(c, AV_LOG_INFO, "SwScaler: BILINEAR scaler, ");

  2322. 		else if(flags&SWS_BICUBIC)

  2323. 			av_log(c, AV_LOG_INFO, "SwScaler: BICUBIC scaler, ");

  2324. 		else if(flags&SWS_X)

  2325. 			av_log(c, AV_LOG_INFO, "SwScaler: Experimental scaler, ");

  2326. 		else if(flags&SWS_POINT)

  2327. 			av_log(c, AV_LOG_INFO, "SwScaler: Nearest Neighbor / POINT scaler, ");

  2328. 		else if(flags&SWS_AREA)

  2329. 			av_log(c, AV_LOG_INFO, "SwScaler: Area Averageing scaler, ");

  2330. 		else if(flags&SWS_BICUBLIN)

  2331. 			av_log(c, AV_LOG_INFO, "SwScaler: luma BICUBIC / chroma BILINEAR scaler, ");

  2332. 		else if(flags&SWS_GAUSS)

  2333. 			av_log(c, AV_LOG_INFO, "SwScaler: Gaussian scaler, ");

  2334. 		else if(flags&SWS_SINC)

  2335. 			av_log(c, AV_LOG_INFO, "SwScaler: Sinc scaler, ");

  2336. 		else if(flags&SWS_LANCZOS)

  2337. 			av_log(c, AV_LOG_INFO, "SwScaler: Lanczos scaler, ");

  2338. 		else if(flags&SWS_SPLINE)

  2339. 			av_log(c, AV_LOG_INFO, "SwScaler: Bicubic spline scaler, ");

  2340. 		else

  2341. 			av_log(c, AV_LOG_INFO, "SwScaler: ehh flags invalid?! ");

  2342. 

  2343. 		if(dstFormat==PIX_FMT_BGR555 || dstFormat==PIX_FMT_BGR565)

  2344. 			av_log(c, AV_LOG_INFO, "from %s to%s %s ", 

  2345. 				sws_format_name(srcFormat), dither, sws_format_name(dstFormat));

  2346. 		else

  2347. 			av_log(c, AV_LOG_INFO, "from %s to %s ", 

  2348. 				sws_format_name(srcFormat), sws_format_name(dstFormat));

  2349. 

  2350. 		if(flags & SWS_CPU_CAPS_MMX2)

  2351. 			av_log(c, AV_LOG_INFO, "using MMX2\n");

  2352. 		else if(flags & SWS_CPU_CAPS_3DNOW)

  2353. 			av_log(c, AV_LOG_INFO, "using 3DNOW\n");

  2354. 		else if(flags & SWS_CPU_CAPS_MMX)

  2355. 			av_log(c, AV_LOG_INFO, "using MMX\n");

  2356. 		else if(flags & SWS_CPU_CAPS_ALTIVEC)

  2357. 			av_log(c, AV_LOG_INFO, "using AltiVec\n");

  2358. 		else 

  2359. 			av_log(c, AV_LOG_INFO, "using C\n");

  2360. 	}

  2361. 

  2362. 	if(flags & SWS_PRINT_INFO)

  2363. 	{

  2364. 		if(flags & SWS_CPU_CAPS_MMX)

  2365. 		{

  2366. 			if(c->canMMX2BeUsed && (flags&SWS_FAST_BILINEAR))

  2367. 				av_log(c, AV_LOG_VERBOSE, "SwScaler: using FAST_BILINEAR MMX2 scaler for horizontal scaling\n");

  2368. 			else

  2369. 			{

  2370. 				if(c->hLumFilterSize==4)

  2371. 					av_log(c, AV_LOG_VERBOSE, "SwScaler: using 4-tap MMX scaler for horizontal luminance scaling\n");

  2372. 				else if(c->hLumFilterSize==8)

  2373. 					av_log(c, AV_LOG_VERBOSE, "SwScaler: using 8-tap MMX scaler for horizontal luminance scaling\n");

  2374. 				else

  2375. 					av_log(c, AV_LOG_VERBOSE, "SwScaler: using n-tap MMX scaler for horizontal luminance scaling\n");

  2376. 

  2377. 				if(c->hChrFilterSize==4)

  2378. 					av_log(c, AV_LOG_VERBOSE, "SwScaler: using 4-tap MMX scaler for horizontal chrominance scaling\n");

  2379. 				else if(c->hChrFilterSize==8)

  2380. 					av_log(c, AV_LOG_VERBOSE, "SwScaler: using 8-tap MMX scaler for horizontal chrominance scaling\n");

  2381. 				else

  2382. 					av_log(c, AV_LOG_VERBOSE, "SwScaler: using n-tap MMX scaler for horizontal chrominance scaling\n");

  2383. 			}

  2384. 		}

  2385. 		else

  2386. 		{

  2387. #if defined(ARCH_X86)

  2388. 			av_log(c, AV_LOG_VERBOSE, "SwScaler: using X86-Asm scaler for horizontal scaling\n");

  2389. #else

  2390. 			if(flags & SWS_FAST_BILINEAR)

  2391. 				av_log(c, AV_LOG_VERBOSE, "SwScaler: using FAST_BILINEAR C scaler for horizontal scaling\n");

  2392. 			else

  2393. 				av_log(c, AV_LOG_VERBOSE, "SwScaler: using C scaler for horizontal scaling\n");

  2394. #endif

  2395. 		}

  2396. 		if(isPlanarYUV(dstFormat))

  2397. 		{

  2398. 			if(c->vLumFilterSize==1)

  2399. 				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");

  2400. 			else

  2401. 				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");

  2402. 		}

  2403. 		else

  2404. 		{

  2405. 			if(c->vLumFilterSize==1 && c->vChrFilterSize==2)

  2406. 				av_log(c, AV_LOG_VERBOSE, "SwScaler: using 1-tap %s \"scaler\" for vertical luminance scaling (BGR)\n"

  2407. 				       "SwScaler:       2-tap scaler for vertical chrominance scaling (BGR)\n",(flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");

  2408. 			else if(c->vLumFilterSize==2 && c->vChrFilterSize==2)

  2409. 				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");

  2410. 			else

  2411. 				av_log(c, AV_LOG_VERBOSE, "SwScaler: using n-tap %s scaler for vertical scaling (BGR)\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");

  2412. 		}

  2413. 

  2414. 		if(dstFormat==PIX_FMT_BGR24)

  2415. 			av_log(c, AV_LOG_VERBOSE, "SwScaler: using %s YV12->BGR24 Converter\n",

  2416. 				(flags & SWS_CPU_CAPS_MMX2) ? "MMX2" : ((flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C"));

  2417. 		else if(dstFormat==PIX_FMT_RGB32)

  2418. 			av_log(c, AV_LOG_VERBOSE, "SwScaler: using %s YV12->BGR32 Converter\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");

  2419. 		else if(dstFormat==PIX_FMT_BGR565)

  2420. 			av_log(c, AV_LOG_VERBOSE, "SwScaler: using %s YV12->BGR16 Converter\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");

  2421. 		else if(dstFormat==PIX_FMT_BGR555)

  2422. 			av_log(c, AV_LOG_VERBOSE, "SwScaler: using %s YV12->BGR15 Converter\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");

  2423. 

  2424. 		av_log(c, AV_LOG_VERBOSE, "SwScaler: %dx%d -> %dx%d\n", srcW, srcH, dstW, dstH);

  2425. 	}

  2426. 	if(flags & SWS_PRINT_INFO)

  2427. 	{

  2428. 		av_log(c, AV_LOG_DEBUG, "SwScaler:Lum srcW=%d srcH=%d dstW=%d dstH=%d xInc=%d yInc=%d\n",

  2429. 			c->srcW, c->srcH, c->dstW, c->dstH, c->lumXInc, c->lumYInc);

  2430. 		av_log(c, AV_LOG_DEBUG, "SwScaler:Chr srcW=%d srcH=%d dstW=%d dstH=%d xInc=%d yInc=%d\n",

  2431. 			c->chrSrcW, c->chrSrcH, c->chrDstW, c->chrDstH, c->chrXInc, c->chrYInc);

  2432. 	}

  2433. 

  2434. 	c->swScale= getSwsFunc(flags);

  2435. 	return c;

  2436. }

  2437. 

  2438. /**

  2439.  * swscale warper, so we don't need to export the SwsContext.

  2440.  * assumes planar YUV to be in YUV order instead of YVU

  2441.  */

  2442. int sws_scale(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  2443.                            int srcSliceH, uint8_t* dst[], int dstStride[]){

  2444.         int i;

  2445.         uint8_t* src2[4]= {src[0], src[1], src[2]};

  2446.         uint32_t pal[256];

  2447. 	if (c->sliceDir == 0 && srcSliceY != 0 && srcSliceY + srcSliceH != c->srcH) {

  2448. 	    av_log(c, AV_LOG_ERROR, "swScaler: slices start in the middle!\n");

  2449. 	    return 0;

  2450. 	}

  2451. 	if (c->sliceDir == 0) {

  2452. 	    if (srcSliceY == 0) c->sliceDir = 1; else c->sliceDir = -1;

  2453. 	}

  2454. 

  2455.         if(c->srcFormat == PIX_FMT_PAL8){

  2456.                 for(i=0; i<256; i++){

  2457.                         int p= ((uint32_t*)(src[1]))[i];

  2458.                         int r= (p>>16)&0xFF;

  2459.                         int g= (p>> 8)&0xFF;

  2460.                         int b=  p     &0xFF;

  2461.                         int y= av_clip_uint8(((RY*r + GY*g + BY*b)>>RGB2YUV_SHIFT) + 16 );

  2462.                         int u= av_clip_uint8(((RU*r + GU*g + BU*b)>>RGB2YUV_SHIFT) + 128);

  2463.                         int v= av_clip_uint8(((RV*r + GV*g + BV*b)>>RGB2YUV_SHIFT) + 128);

  2464.                         pal[i]= y + (u<<8) + (v<<16);

  2465.                 }

  2466.                 src2[1]= pal;

  2467.         }

  2468. 

  2469. 	// copy strides, so they can safely be modified

  2470. 	if (c->sliceDir == 1) {

  2471. 	    // slices go from top to bottom

  2472. 	    int srcStride2[4]= {srcStride[0], srcStride[1], srcStride[2]};

  2473. 	    int dstStride2[4]= {dstStride[0], dstStride[1], dstStride[2]};

  2474. 	    return c->swScale(c, src2, srcStride2, srcSliceY, srcSliceH, dst, dstStride2);

  2475. 	} else {

  2476. 	    // slices go from bottom to top => we flip the image internally

  2477. 	    uint8_t* dst2[4]= {dst[0] + (c->dstH-1)*dstStride[0],

  2478. 			       dst[1] + ((c->dstH>>c->chrDstVSubSample)-1)*dstStride[1],

  2479. 			       dst[2] + ((c->dstH>>c->chrDstVSubSample)-1)*dstStride[2]};

  2480. 	    int srcStride2[4]= {-srcStride[0], -srcStride[1], -srcStride[2]};

  2481. 	    int dstStride2[4]= {-dstStride[0], -dstStride[1], -dstStride[2]};

  2482. 

  2483.             src2[0] += (srcSliceH-1)*srcStride[0];

  2484.             if(c->srcFormat != PIX_FMT_PAL8)

  2485.                     src2[1] += ((srcSliceH>>c->chrSrcVSubSample)-1)*srcStride[1];

  2486.             src2[2] += ((srcSliceH>>c->chrSrcVSubSample)-1)*srcStride[2];

  2487. 	    

  2488. 	    return c->swScale(c, src2, srcStride2, c->srcH-srcSliceY-srcSliceH, srcSliceH, dst2, dstStride2);

  2489. 	}

  2490. }

  2491. 

  2492. /**

  2493.  * swscale warper, so we don't need to export the SwsContext

  2494.  */

  2495. int sws_scale_ordered(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  2496.                            int srcSliceH, uint8_t* dst[], int dstStride[]){

  2497. 	return sws_scale(c, src, srcStride, srcSliceY, srcSliceH, dst, dstStride);

  2498. }

  2499. 

  2500. SwsFilter *sws_getDefaultFilter(float lumaGBlur, float chromaGBlur, 

  2501. 				float lumaSharpen, float chromaSharpen,

  2502. 				float chromaHShift, float chromaVShift,

  2503. 				int verbose)

  2504. {

  2505. 	SwsFilter *filter= av_malloc(sizeof(SwsFilter));

  2506. 

  2507. 	if(lumaGBlur!=0.0){

  2508. 		filter->lumH= sws_getGaussianVec(lumaGBlur, 3.0);

  2509. 		filter->lumV= sws_getGaussianVec(lumaGBlur, 3.0);

  2510. 	}else{

  2511. 		filter->lumH= sws_getIdentityVec();

  2512. 		filter->lumV= sws_getIdentityVec();

  2513. 	}

  2514. 

  2515. 	if(chromaGBlur!=0.0){

  2516. 		filter->chrH= sws_getGaussianVec(chromaGBlur, 3.0);

  2517. 		filter->chrV= sws_getGaussianVec(chromaGBlur, 3.0);

  2518. 	}else{

  2519. 		filter->chrH= sws_getIdentityVec();

  2520. 		filter->chrV= sws_getIdentityVec();

  2521. 	}

  2522. 

  2523. 	if(chromaSharpen!=0.0){

  2524. 		SwsVector *id= sws_getIdentityVec();

  2525.                 sws_scaleVec(filter->chrH, -chromaSharpen);

  2526.                 sws_scaleVec(filter->chrV, -chromaSharpen);

  2527. 		sws_addVec(filter->chrH, id);

  2528. 		sws_addVec(filter->chrV, id);

  2529. 		sws_freeVec(id);

  2530. 	}

  2531. 

  2532. 	if(lumaSharpen!=0.0){

  2533. 		SwsVector *id= sws_getIdentityVec();

  2534.                 sws_scaleVec(filter->lumH, -lumaSharpen);

  2535.                 sws_scaleVec(filter->lumV, -lumaSharpen);

  2536. 		sws_addVec(filter->lumH, id);

  2537. 		sws_addVec(filter->lumV, id);

  2538. 		sws_freeVec(id);

  2539. 	}

  2540. 

  2541. 	if(chromaHShift != 0.0)

  2542. 		sws_shiftVec(filter->chrH, (int)(chromaHShift+0.5));

  2543. 

  2544. 	if(chromaVShift != 0.0)

  2545. 		sws_shiftVec(filter->chrV, (int)(chromaVShift+0.5));

  2546. 

  2547. 	sws_normalizeVec(filter->chrH, 1.0);

  2548. 	sws_normalizeVec(filter->chrV, 1.0);

  2549. 	sws_normalizeVec(filter->lumH, 1.0);

  2550. 	sws_normalizeVec(filter->lumV, 1.0);

  2551. 

  2552. 	if(verbose) sws_printVec(filter->chrH);

  2553. 	if(verbose) sws_printVec(filter->lumH);

  2554. 

  2555.         return filter;

  2556. }

  2557. 

  2558. /**

  2559.  * returns a normalized gaussian curve used to filter stuff

  2560.  * quality=3 is high quality, lowwer is lowwer quality

  2561.  */

  2562. SwsVector *sws_getGaussianVec(double variance, double quality){

  2563. 	const int length= (int)(variance*quality + 0.5) | 1;

  2564. 	int i;

  2565. 	double *coeff= av_malloc(length*sizeof(double));

  2566. 	double middle= (length-1)*0.5;

  2567. 	SwsVector *vec= av_malloc(sizeof(SwsVector));

  2568. 

  2569. 	vec->coeff= coeff;

  2570. 	vec->length= length;

  2571. 

  2572. 	for(i=0; i<length; i++)

  2573. 	{

  2574. 		double dist= i-middle;

  2575. 		coeff[i]= exp( -dist*dist/(2*variance*variance) ) / sqrt(2*variance*PI);

  2576. 	}

  2577. 

  2578. 	sws_normalizeVec(vec, 1.0);

  2579. 

  2580. 	return vec;

  2581. }

  2582. 

  2583. SwsVector *sws_getConstVec(double c, int length){

  2584. 	int i;

  2585. 	double *coeff= av_malloc(length*sizeof(double));

  2586. 	SwsVector *vec= av_malloc(sizeof(SwsVector));

  2587. 

  2588. 	vec->coeff= coeff;

  2589. 	vec->length= length;

  2590. 

  2591. 	for(i=0; i<length; i++)

  2592. 		coeff[i]= c;

  2593. 

  2594. 	return vec;

  2595. }

  2596. 

  2597. 

  2598. SwsVector *sws_getIdentityVec(void){

  2599.         return sws_getConstVec(1.0, 1);

  2600. }

  2601. 

  2602. double sws_dcVec(SwsVector *a){

  2603. 	int i;

  2604.         double sum=0;

  2605. 

  2606. 	for(i=0; i<a->length; i++)

  2607. 		sum+= a->coeff[i];

  2608. 

  2609.         return sum;

  2610. }

  2611. 

  2612. void sws_scaleVec(SwsVector *a, double scalar){

  2613. 	int i;

  2614. 

  2615. 	for(i=0; i<a->length; i++)

  2616. 		a->coeff[i]*= scalar;

  2617. }

  2618. 

  2619. void sws_normalizeVec(SwsVector *a, double height){

  2620.         sws_scaleVec(a, height/sws_dcVec(a));

  2621. }

  2622. 

  2623. static SwsVector *sws_getConvVec(SwsVector *a, SwsVector *b){

  2624. 	int length= a->length + b->length - 1;

  2625. 	double *coeff= av_malloc(length*sizeof(double));

  2626. 	int i, j;

  2627. 	SwsVector *vec= av_malloc(sizeof(SwsVector));

  2628. 

  2629. 	vec->coeff= coeff;

  2630. 	vec->length= length;

  2631. 

  2632. 	for(i=0; i<length; i++) coeff[i]= 0.0;

  2633. 

  2634. 	for(i=0; i<a->length; i++)

  2635. 	{

  2636. 		for(j=0; j<b->length; j++)

  2637. 		{

  2638. 			coeff[i+j]+= a->coeff[i]*b->coeff[j];

  2639. 		}

  2640. 	}

  2641. 

  2642. 	return vec;

  2643. }

  2644. 

  2645. static SwsVector *sws_sumVec(SwsVector *a, SwsVector *b){

  2646. 	int length= FFMAX(a->length, b->length);

  2647. 	double *coeff= av_malloc(length*sizeof(double));

  2648. 	int i;

  2649. 	SwsVector *vec= av_malloc(sizeof(SwsVector));

  2650. 

  2651. 	vec->coeff= coeff;

  2652. 	vec->length= length;

  2653. 

  2654. 	for(i=0; i<length; i++) coeff[i]= 0.0;

  2655. 

  2656. 	for(i=0; i<a->length; i++) coeff[i + (length-1)/2 - (a->length-1)/2]+= a->coeff[i];

  2657. 	for(i=0; i<b->length; i++) coeff[i + (length-1)/2 - (b->length-1)/2]+= b->coeff[i];

  2658. 

  2659. 	return vec;

  2660. }

  2661. 

  2662. static SwsVector *sws_diffVec(SwsVector *a, SwsVector *b){

  2663. 	int length= FFMAX(a->length, b->length);

  2664. 	double *coeff= av_malloc(length*sizeof(double));

  2665. 	int i;

  2666. 	SwsVector *vec= av_malloc(sizeof(SwsVector));

  2667. 

  2668. 	vec->coeff= coeff;

  2669. 	vec->length= length;

  2670. 

  2671. 	for(i=0; i<length; i++) coeff[i]= 0.0;

  2672. 

  2673. 	for(i=0; i<a->length; i++) coeff[i + (length-1)/2 - (a->length-1)/2]+= a->coeff[i];

  2674. 	for(i=0; i<b->length; i++) coeff[i + (length-1)/2 - (b->length-1)/2]-= b->coeff[i];

  2675. 

  2676. 	return vec;

  2677. }

  2678. 

  2679. /* shift left / or right if "shift" is negative */

  2680. static SwsVector *sws_getShiftedVec(SwsVector *a, int shift){

  2681. 	int length= a->length + FFABS(shift)*2;

  2682. 	double *coeff= av_malloc(length*sizeof(double));

  2683. 	int i;

  2684. 	SwsVector *vec= av_malloc(sizeof(SwsVector));

  2685. 

  2686. 	vec->coeff= coeff;

  2687. 	vec->length= length;

  2688. 

  2689. 	for(i=0; i<length; i++) coeff[i]= 0.0;

  2690. 

  2691. 	for(i=0; i<a->length; i++)

  2692. 	{

  2693. 		coeff[i + (length-1)/2 - (a->length-1)/2 - shift]= a->coeff[i];

  2694. 	}

  2695. 

  2696. 	return vec;

  2697. }

  2698. 

  2699. void sws_shiftVec(SwsVector *a, int shift){

  2700. 	SwsVector *shifted= sws_getShiftedVec(a, shift);

  2701. 	av_free(a->coeff);

  2702. 	a->coeff= shifted->coeff;

  2703. 	a->length= shifted->length;

  2704. 	av_free(shifted);

  2705. }

  2706. 

  2707. void sws_addVec(SwsVector *a, SwsVector *b){

  2708. 	SwsVector *sum= sws_sumVec(a, b);

  2709. 	av_free(a->coeff);

  2710. 	a->coeff= sum->coeff;

  2711. 	a->length= sum->length;

  2712. 	av_free(sum);

  2713. }

  2714. 

  2715. void sws_subVec(SwsVector *a, SwsVector *b){

  2716. 	SwsVector *diff= sws_diffVec(a, b);

  2717. 	av_free(a->coeff);

  2718. 	a->coeff= diff->coeff;

  2719. 	a->length= diff->length;

  2720. 	av_free(diff);

  2721. }

  2722. 

  2723. void sws_convVec(SwsVector *a, SwsVector *b){

  2724. 	SwsVector *conv= sws_getConvVec(a, b);

  2725. 	av_free(a->coeff);  

  2726. 	a->coeff= conv->coeff;

  2727. 	a->length= conv->length;

  2728. 	av_free(conv);

  2729. }

  2730. 

  2731. SwsVector *sws_cloneVec(SwsVector *a){

  2732. 	double *coeff= av_malloc(a->length*sizeof(double));

  2733. 	int i;

  2734. 	SwsVector *vec= av_malloc(sizeof(SwsVector));

  2735. 

  2736. 	vec->coeff= coeff;

  2737. 	vec->length= a->length;

  2738. 

  2739. 	for(i=0; i<a->length; i++) coeff[i]= a->coeff[i];

  2740. 

  2741. 	return vec;

  2742. }

  2743. 

  2744. void sws_printVec(SwsVector *a){

  2745. 	int i;

  2746. 	double max=0;

  2747. 	double min=0;

  2748. 	double range;

  2749. 

  2750. 	for(i=0; i<a->length; i++)

  2751. 		if(a->coeff[i]>max) max= a->coeff[i];

  2752. 

  2753. 	for(i=0; i<a->length; i++)

  2754. 		if(a->coeff[i]<min) min= a->coeff[i];

  2755. 

  2756. 	range= max - min;

  2757. 

  2758. 	for(i=0; i<a->length; i++)

  2759. 	{

  2760. 		int x= (int)((a->coeff[i]-min)*60.0/range +0.5);

  2761. 		av_log(NULL, AV_LOG_DEBUG, "%1.3f ", a->coeff[i]);

  2762. 		for(;x>0; x--) av_log(NULL, AV_LOG_DEBUG, " ");

  2763. 		av_log(NULL, AV_LOG_DEBUG, "|\n");

  2764. 	}

  2765. }

  2766. 

  2767. void sws_freeVec(SwsVector *a){

  2768. 	if(!a) return;

  2769. 	av_free(a->coeff);

  2770. 	a->coeff=NULL;

  2771. 	a->length=0;

  2772. 	av_free(a);

  2773. }

  2774. 

  2775. void sws_freeFilter(SwsFilter *filter){

  2776. 	if(!filter) return;

  2777. 

  2778. 	if(filter->lumH) sws_freeVec(filter->lumH);

  2779. 	if(filter->lumV) sws_freeVec(filter->lumV);

  2780. 	if(filter->chrH) sws_freeVec(filter->chrH);

  2781. 	if(filter->chrV) sws_freeVec(filter->chrV);

  2782. 	av_free(filter);

  2783. }

  2784. 

  2785. 

  2786. void sws_freeContext(SwsContext *c){

  2787. 	int i;

  2788. 	if(!c) return;

  2789. 

  2790. 	if(c->lumPixBuf)

  2791. 	{

  2792. 		for(i=0; i<c->vLumBufSize; i++)

  2793. 		{

  2794. 			av_free(c->lumPixBuf[i]);

  2795. 			c->lumPixBuf[i]=NULL;

  2796. 		}

  2797. 		av_free(c->lumPixBuf);

  2798. 		c->lumPixBuf=NULL;

  2799. 	}

  2800. 

  2801. 	if(c->chrPixBuf)

  2802. 	{

  2803. 		for(i=0; i<c->vChrBufSize; i++)

  2804. 		{

  2805. 			av_free(c->chrPixBuf[i]);

  2806. 			c->chrPixBuf[i]=NULL;

  2807. 		}

  2808. 		av_free(c->chrPixBuf);

  2809. 		c->chrPixBuf=NULL;

  2810. 	}

  2811. 

  2812. 	av_free(c->vLumFilter);

  2813. 	c->vLumFilter = NULL;

  2814. 	av_free(c->vChrFilter);

  2815. 	c->vChrFilter = NULL;

  2816. 	av_free(c->hLumFilter);

  2817. 	c->hLumFilter = NULL;

  2818. 	av_free(c->hChrFilter);

  2819. 	c->hChrFilter = NULL;

  2820. #ifdef HAVE_ALTIVEC

  2821. 	av_free(c->vYCoeffsBank);

  2822. 	c->vYCoeffsBank = NULL;

  2823. 	av_free(c->vCCoeffsBank);

  2824. 	c->vCCoeffsBank = NULL;

  2825. #endif

  2826. 

  2827. 	av_free(c->vLumFilterPos);

  2828. 	c->vLumFilterPos = NULL;

  2829. 	av_free(c->vChrFilterPos);

  2830. 	c->vChrFilterPos = NULL;

  2831. 	av_free(c->hLumFilterPos);

  2832. 	c->hLumFilterPos = NULL;

  2833. 	av_free(c->hChrFilterPos);

  2834. 	c->hChrFilterPos = NULL;

  2835. 

  2836. #if defined(ARCH_X86) && defined(CONFIG_GPL)

  2837. #ifdef MAP_ANONYMOUS

  2838. 	if(c->funnyYCode) munmap(c->funnyYCode, MAX_FUNNY_CODE_SIZE);

  2839. 	if(c->funnyUVCode) munmap(c->funnyUVCode, MAX_FUNNY_CODE_SIZE);

  2840. #else

  2841. 	av_free(c->funnyYCode);

  2842. 	av_free(c->funnyUVCode);

  2843. #endif

  2844. 	c->funnyYCode=NULL;

  2845. 	c->funnyUVCode=NULL;

  2846. #endif /* defined(ARCH_X86) */

  2847. 

  2848. 	av_free(c->lumMmx2Filter);

  2849. 	c->lumMmx2Filter=NULL;

  2850. 	av_free(c->chrMmx2Filter);

  2851. 	c->chrMmx2Filter=NULL;

  2852. 	av_free(c->lumMmx2FilterPos);

  2853. 	c->lumMmx2FilterPos=NULL;

  2854. 	av_free(c->chrMmx2FilterPos);

  2855. 	c->chrMmx2FilterPos=NULL;

  2856. 	av_free(c->yuvTable);

  2857. 	c->yuvTable=NULL;

  2858. 

  2859. 	av_free(c);

  2860. }

  2861. 

  2862. /**

  2863.  * Checks if context is valid or reallocs a new one instead.

  2864.  * If context is NULL, just calls sws_getContext() to get a new one.

  2865.  * Otherwise, checks if the parameters are the same already saved in context.

  2866.  * If that is the case, returns the current context.

  2867.  * Otherwise, frees context and gets a new one.

  2868.  *

  2869.  * Be warned that srcFilter, dstFilter are not checked, they are

  2870.  * asumed to remain valid.

  2871.  */

  2872. struct SwsContext *sws_getCachedContext(struct SwsContext *context,

  2873.                         int srcW, int srcH, int srcFormat,

  2874.                         int dstW, int dstH, int dstFormat, int flags,

  2875.                         SwsFilter *srcFilter, SwsFilter *dstFilter, double *param)

  2876. {

  2877.     if (context != NULL) {

  2878.         if ((context->srcW != srcW) || (context->srcH != srcH) ||

  2879.             (context->srcFormat != srcFormat) ||

  2880.             (context->dstW != dstW) || (context->dstH != dstH) ||

  2881.             (context->dstFormat != dstFormat) || (context->flags != flags) ||

  2882.             (context->param != param))

  2883.         {

  2884.             sws_freeContext(context);

  2885.             context = NULL;

  2886.         }

  2887.     }

  2888.     if (context == NULL) {

  2889.         return sws_getContext(srcW, srcH, srcFormat,

  2890.                         dstW, dstH, dstFormat, flags,

  2891.                         srcFilter, dstFilter, param);

  2892.     }

  2893.     return context;

  2894. }