falkTX
/
FFmpeg
mirror of https://github.com/falkTX/FFmpeg.git
1
0
Fork 0
Code Issues 0 Releases 338 Wiki Activity
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
10166 Commits
32 Branches
1.0GB
Tree: 82e4ac2c97
Branches Tags
${ item.name }
Create branch ${ searchTerm }
from '82e4ac2c97'
${ noResults }
FFmpeg/libswscale/swscale.c

2967 lines
101KB
Raw Blame History 

  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 Street, 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 (it is 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. #include "libavcodec/opt.h"

  76. 

  77. #undef MOVNTQ

  78. #undef PAVGB

  79. 

  80. //#undef HAVE_MMX2

  81. //#define HAVE_3DNOW

  82. //#undef HAVE_MMX

  83. //#undef ARCH_X86

  84. //#define WORDS_BIGENDIAN

  85. #define DITHER1XBPP

  86. 

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

  88. 

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

  90. 

  91. #ifdef MP_DEBUG

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

  93. #else

  94. #define ASSERT(x) ;

  95. #endif

  96. 

  97. #ifdef M_PI

  98. #define PI M_PI

  99. #else

  100. #define PI 3.14159265358979323846

  101. #endif

  102. 

  103. #define isSupportedIn(x)    (       \

  104.            (x)==PIX_FMT_YUV420P     \

  105.         || (x)==PIX_FMT_YUYV422     \

  106.         || (x)==PIX_FMT_UYVY422     \

  107.         || (x)==PIX_FMT_RGB32       \

  108.         || (x)==PIX_FMT_BGR24       \

  109.         || (x)==PIX_FMT_BGR565      \

  110.         || (x)==PIX_FMT_BGR555      \

  111.         || (x)==PIX_FMT_BGR32       \

  112.         || (x)==PIX_FMT_RGB24       \

  113.         || (x)==PIX_FMT_RGB565      \

  114.         || (x)==PIX_FMT_RGB555      \

  115.         || (x)==PIX_FMT_GRAY8       \

  116.         || (x)==PIX_FMT_YUV410P     \

  117.         || (x)==PIX_FMT_GRAY16BE    \

  118.         || (x)==PIX_FMT_GRAY16LE    \

  119.         || (x)==PIX_FMT_YUV444P     \

  120.         || (x)==PIX_FMT_YUV422P     \

  121.         || (x)==PIX_FMT_YUV411P     \

  122.         || (x)==PIX_FMT_PAL8        \

  123.         || (x)==PIX_FMT_BGR8        \

  124.         || (x)==PIX_FMT_RGB8        \

  125.         || (x)==PIX_FMT_BGR4_BYTE   \

  126.         || (x)==PIX_FMT_RGB4_BYTE   \

  127.     )

  128. #define isSupportedOut(x)   (       \

  129.            (x)==PIX_FMT_YUV420P     \

  130.         || (x)==PIX_FMT_YUYV422     \

  131.         || (x)==PIX_FMT_UYVY422     \

  132.         || (x)==PIX_FMT_YUV444P     \

  133.         || (x)==PIX_FMT_YUV422P     \

  134.         || (x)==PIX_FMT_YUV411P     \

  135.         || isRGB(x)                 \

  136.         || isBGR(x)                 \

  137.         || (x)==PIX_FMT_NV12        \

  138.         || (x)==PIX_FMT_NV21        \

  139.         || (x)==PIX_FMT_GRAY16BE    \

  140.         || (x)==PIX_FMT_GRAY16LE    \

  141.         || (x)==PIX_FMT_GRAY8       \

  142.         || (x)==PIX_FMT_YUV410P     \

  143.     )

  144. #define isPacked(x)         (       \

  145.            (x)==PIX_FMT_PAL8        \

  146.         || (x)==PIX_FMT_YUYV422     \

  147.         || (x)==PIX_FMT_UYVY422     \

  148.         || isRGB(x)                 \

  149.         || isBGR(x)                 \

  150.     )

  151. 

  152. #define RGB2YUV_SHIFT 16

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

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

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

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

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

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

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

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

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

  162. 

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

  164. 

  165. /*

  166. NOTES

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

  168. 

  169. TODO

  170. more intelligent missalignment avoidance for the horizontal scaler

  171. write special vertical cubic upscale version

  172. Optimize C code (yv12 / minmax)

  173. add support for packed pixel yuv input & output

  174. add support for Y8 output

  175. optimize bgr24 & bgr32

  176. add BGR4 output support

  177. write special BGR->BGR scaler

  178. */

  179. 

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

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

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

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

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

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

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

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

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

  189. 

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

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

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

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

  194. 

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

  196.         0x0103010301030103LL,

  197.         0x0200020002000200LL,};

  198. 

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

  200.         0x0602060206020602LL,

  201.         0x0004000400040004LL,};

  202. 

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

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

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

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

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

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

  209. 

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

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

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

  213. 

  214. #ifdef FAST_BGR2YV12

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

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

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

  218. #else

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

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

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

  222. #endif /* FAST_BGR2YV12 */

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

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

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

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

  227. 

  228. // clipping helper table for C implementations:

  229. static unsigned char clip_table[768];

  230. 

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

  232. 

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

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

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

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

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

  238. 

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

  240.     return "swscaler";

  241. }

  242. 

  243. #define OFFSET(x) offsetof(SwsContext, x)

  244. #define DEFAULT 0

  245. #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM

  246. 

  247. static const AVOption options[] = {

  248.     { "sws_flags", "scaler/cpu flags", OFFSET(flags), FF_OPT_TYPE_FLAGS, DEFAULT, INT_MIN, INT_MAX, VE, "sws_flags" },

  249.     { "fast_bilinear", "fast bilinear", 0, FF_OPT_TYPE_CONST, SWS_FAST_BILINEAR, INT_MIN, INT_MAX, VE, "sws_flags" },

  250.     { "bilinear", "bilinear", 0, FF_OPT_TYPE_CONST, SWS_BILINEAR, INT_MIN, INT_MAX, VE, "sws_flags" },

  251.     { "bicubic", "bicubic", 0, FF_OPT_TYPE_CONST, SWS_BICUBIC, INT_MIN, INT_MAX, VE, "sws_flags" },

  252.     { "experimental", "experimental", 0, FF_OPT_TYPE_CONST, SWS_X, INT_MIN, INT_MAX, VE, "sws_flags" },

  253.     { "neighbor", "nearest neighbor", 0, FF_OPT_TYPE_CONST, SWS_POINT, INT_MIN, INT_MAX, VE, "sws_flags" },

  254.     { "area", "averaging area", 0, FF_OPT_TYPE_CONST, SWS_AREA, INT_MIN, INT_MAX, VE, "sws_flags" },

  255.     { "bicublin", "luma bicubic, chroma bilinear", 0, FF_OPT_TYPE_CONST, SWS_BICUBLIN, INT_MIN, INT_MAX, VE, "sws_flags" },

  256.     { "gauss", "gaussian", 0, FF_OPT_TYPE_CONST, SWS_GAUSS, INT_MIN, INT_MAX, VE, "sws_flags" },

  257.     { "sinc", "sinc", 0, FF_OPT_TYPE_CONST, SWS_SINC, INT_MIN, INT_MAX, VE, "sws_flags" },

  258.     { "lanczos", "lanczos", 0, FF_OPT_TYPE_CONST, SWS_LANCZOS, INT_MIN, INT_MAX, VE, "sws_flags" },

  259.     { "spline", "natural bicubic spline", 0, FF_OPT_TYPE_CONST, SWS_SPLINE, INT_MIN, INT_MAX, VE, "sws_flags" },

  260.     { "print_info", "print info", 0, FF_OPT_TYPE_CONST, SWS_PRINT_INFO, INT_MIN, INT_MAX, VE, "sws_flags" },

  261.     { "accurate_rnd", "accurate rounding", 0, FF_OPT_TYPE_CONST, SWS_ACCURATE_RND, INT_MIN, INT_MAX, VE, "sws_flags" },

  262.     { "mmx", "MMX SIMD acceleration", 0, FF_OPT_TYPE_CONST, SWS_CPU_CAPS_MMX, INT_MIN, INT_MAX, VE, "sws_flags" },

  263.     { "mmx2", "MMX2 SIMD acceleration", 0, FF_OPT_TYPE_CONST, SWS_CPU_CAPS_MMX2, INT_MIN, INT_MAX, VE, "sws_flags" },

  264.     { "3dnow", "3DNOW SIMD acceleration", 0, FF_OPT_TYPE_CONST, SWS_CPU_CAPS_3DNOW, INT_MIN, INT_MAX, VE, "sws_flags" },

  265.     { "altivec", "AltiVec SIMD acceleration", 0, FF_OPT_TYPE_CONST, SWS_CPU_CAPS_ALTIVEC, INT_MIN, INT_MAX, VE, "sws_flags" },

  266.     { "bfin", "Blackfin SIMD acceleration", 0, FF_OPT_TYPE_CONST, SWS_CPU_CAPS_BFIN, INT_MIN, INT_MAX, VE, "sws_flags" },

  267.     { "full_chroma_int", "full chroma interpolation", 0 , FF_OPT_TYPE_CONST, SWS_FULL_CHR_H_INT, INT_MIN, INT_MAX, VE, "sws_flags" },

  268.     { "full_chroma_inp", "full chroma input", 0 , FF_OPT_TYPE_CONST, SWS_FULL_CHR_H_INP, INT_MIN, INT_MAX, VE, "sws_flags" },

  269.     { NULL }

  270. };

  271. 

  272. #undef VE

  273. #undef DEFAULT

  274. 

  275. static AVClass sws_context_class = { "SWScaler", sws_context_to_name, options };

  276. 

  277. char *sws_format_name(enum PixelFormat format)

  278. {

  279.     switch (format) {

  280.         case PIX_FMT_YUV420P:

  281.             return "yuv420p";

  282.         case PIX_FMT_YUYV422:

  283.             return "yuyv422";

  284.         case PIX_FMT_RGB24:

  285.             return "rgb24";

  286.         case PIX_FMT_BGR24:

  287.             return "bgr24";

  288.         case PIX_FMT_YUV422P:

  289.             return "yuv422p";

  290.         case PIX_FMT_YUV444P:

  291.             return "yuv444p";

  292.         case PIX_FMT_RGB32:

  293.             return "rgb32";

  294.         case PIX_FMT_YUV410P:

  295.             return "yuv410p";

  296.         case PIX_FMT_YUV411P:

  297.             return "yuv411p";

  298.         case PIX_FMT_RGB565:

  299.             return "rgb565";

  300.         case PIX_FMT_RGB555:

  301.             return "rgb555";

  302.         case PIX_FMT_GRAY16BE:

  303.             return "gray16be";

  304.         case PIX_FMT_GRAY16LE:

  305.             return "gray16le";

  306.         case PIX_FMT_GRAY8:

  307.             return "gray8";

  308.         case PIX_FMT_MONOWHITE:

  309.             return "mono white";

  310.         case PIX_FMT_MONOBLACK:

  311.             return "mono black";

  312.         case PIX_FMT_PAL8:

  313.             return "Palette";

  314.         case PIX_FMT_YUVJ420P:

  315.             return "yuvj420p";

  316.         case PIX_FMT_YUVJ422P:

  317.             return "yuvj422p";

  318.         case PIX_FMT_YUVJ444P:

  319.             return "yuvj444p";

  320.         case PIX_FMT_XVMC_MPEG2_MC:

  321.             return "xvmc_mpeg2_mc";

  322.         case PIX_FMT_XVMC_MPEG2_IDCT:

  323.             return "xvmc_mpeg2_idct";

  324.         case PIX_FMT_UYVY422:

  325.             return "uyvy422";

  326.         case PIX_FMT_UYYVYY411:

  327.             return "uyyvyy411";

  328.         case PIX_FMT_RGB32_1:

  329.             return "rgb32x";

  330.         case PIX_FMT_BGR32_1:

  331.             return "bgr32x";

  332.         case PIX_FMT_BGR32:

  333.             return "bgr32";

  334.         case PIX_FMT_BGR565:

  335.             return "bgr565";

  336.         case PIX_FMT_BGR555:

  337.             return "bgr555";

  338.         case PIX_FMT_BGR8:

  339.             return "bgr8";

  340.         case PIX_FMT_BGR4:

  341.             return "bgr4";

  342.         case PIX_FMT_BGR4_BYTE:

  343.             return "bgr4 byte";

  344.         case PIX_FMT_RGB8:

  345.             return "rgb8";

  346.         case PIX_FMT_RGB4:

  347.             return "rgb4";

  348.         case PIX_FMT_RGB4_BYTE:

  349.             return "rgb4 byte";

  350.         case PIX_FMT_NV12:

  351.             return "nv12";

  352.         case PIX_FMT_NV21:

  353.             return "nv21";

  354.         default:

  355.             return "Unknown format";

  356.     }

  357. }

  358. 

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

  360. void in_asm_used_var_warning_killer()

  361. {

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

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

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

  365.     if (i) i=0;

  366. }

  367. #endif

  368. 

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

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

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

  372. {

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

  374.     int i;

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

  376.     {

  377.         int val=1<<18;

  378.         int j;

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

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

  381. 

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

  383.     }

  384. 

  385.     if (uDest != NULL)

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

  387.         {

  388.             int u=1<<18;

  389.             int v=1<<18;

  390.             int j;

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

  392.             {

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

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

  395.             }

  396. 

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

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

  399.         }

  400. }

  401. 

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

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

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

  405. {

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

  407.     int i;

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

  409.     {

  410.         int val=1<<18;

  411.         int j;

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

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

  414. 

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

  416.     }

  417. 

  418.     if (uDest == NULL)

  419.         return;

  420. 

  421.     if (dstFormat == PIX_FMT_NV12)

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

  423.         {

  424.             int u=1<<18;

  425.             int v=1<<18;

  426.             int j;

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

  428.             {

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

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

  431.             }

  432. 

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

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

  435.         }

  436.     else

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

  438.         {

  439.             int u=1<<18;

  440.             int v=1<<18;

  441.             int j;

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

  443.             {

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

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

  446.             }

  447. 

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

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

  450.         }

  451. }

  452. 

  453. #define YSCALE_YUV_2_PACKEDX_C(type) \

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

  455.         int j;\

  456.         int Y1 = 1<<18;\

  457.         int Y2 = 1<<18;\

  458.         int U  = 1<<18;\

  459.         int V  = 1<<18;\

  460.         type av_unused *r, *b, *g;\

  461.         const int i2= 2*i;\

  462.         \

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

  464.         {\

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

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

  467.         }\

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

  469.         {\

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

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

  472.         }\

  473.         Y1>>=19;\

  474.         Y2>>=19;\

  475.         U >>=19;\

  476.         V >>=19;\

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

  478.         {\

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

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

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

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

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

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

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

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

  487.         }

  488. 

  489. #define YSCALE_YUV_2_RGBX_C(type) \

  490.     YSCALE_YUV_2_PACKEDX_C(type)  \

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

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

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

  494. 

  495. #define YSCALE_YUV_2_PACKED2_C   \

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

  497.         const int i2= 2*i;       \

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

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

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

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

  502. 

  503. #define YSCALE_YUV_2_RGB2_C(type) \

  504.     YSCALE_YUV_2_PACKED2_C\

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

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

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

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

  509. 

  510. #define YSCALE_YUV_2_PACKED1_C \

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

  512.         const int i2= 2*i;\

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

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

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

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

  517. 

  518. #define YSCALE_YUV_2_RGB1_C(type) \

  519.     YSCALE_YUV_2_PACKED1_C\

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

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

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

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

  524. 

  525. #define YSCALE_YUV_2_PACKED1B_C \

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

  527.         const int i2= 2*i;\

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

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

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

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

  532. 

  533. #define YSCALE_YUV_2_RGB1B_C(type) \

  534.     YSCALE_YUV_2_PACKED1B_C\

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

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

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

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

  539. 

  540. #define YSCALE_YUV_2_ANYRGB_C(func, func2)\

  541.     switch(c->dstFormat)\

  542.     {\

  543.     case PIX_FMT_RGB32:\

  544.     case PIX_FMT_BGR32:\

  545.         func(uint32_t)\

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

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

  548.         }                \

  549.         break;\

  550.     case PIX_FMT_RGB24:\

  551.         func(uint8_t)\

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

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

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

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

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

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

  558.             dest+=6;\

  559.         }\

  560.         break;\

  561.     case PIX_FMT_BGR24:\

  562.         func(uint8_t)\

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

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

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

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

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

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

  569.             dest+=6;\

  570.         }\

  571.         break;\

  572.     case PIX_FMT_RGB565:\

  573.     case PIX_FMT_BGR565:\

  574.         {\

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

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

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

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

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

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

  581.             func(uint16_t)\

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

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

  584.             }\

  585.         }\

  586.         break;\

  587.     case PIX_FMT_RGB555:\

  588.     case PIX_FMT_BGR555:\

  589.         {\

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

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

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

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

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

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

  596.             func(uint16_t)\

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

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

  599.             }\

  600.         }\

  601.         break;\

  602.     case PIX_FMT_RGB8:\

  603.     case PIX_FMT_BGR8:\

  604.         {\

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

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

  607.             func(uint8_t)\

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

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

  610.             }\

  611.         }\

  612.         break;\

  613.     case PIX_FMT_RGB4:\

  614.     case PIX_FMT_BGR4:\

  615.         {\

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

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

  618.             func(uint8_t)\

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

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

  621.             }\

  622.         }\

  623.         break;\

  624.     case PIX_FMT_RGB4_BYTE:\

  625.     case PIX_FMT_BGR4_BYTE:\

  626.         {\

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

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

  629.             func(uint8_t)\

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

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

  632.             }\

  633.         }\

  634.         break;\

  635.     case PIX_FMT_MONOBLACK:\

  636.         {\

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

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

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

  640.                 int acc;\

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

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

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

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

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

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

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

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

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

  650.                 dest++;\

  651.             }\

  652. \

  653. /*\

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

  655. {\

  656.             int acc=0;\

  657.             int left=0;\

  658.             static int top[1024];\

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

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

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

  662.             int topLeft=0;\

  663.             int shift=0;\

  664.             int count=0;\

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

  666.             int error_new=0;\

  667.             int error_in3=0;\

  668.             int f=0;\

  669.             \

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

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

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

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

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

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

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

  677. \

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

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

  680.                 f= error_new - error_in3*4;\

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

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

  683. \

  684.                 topLeft= top[i];\

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

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

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

  688. \

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

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

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

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

  693.                 }\

  694.             }\

  695. }\

  696. */\

  697.         }\

  698.         break;\

  699.     case PIX_FMT_YUYV422:\

  700.         func2\

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

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

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

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

  705.         }                \

  706.         break;\

  707.     case PIX_FMT_UYVY422:\

  708.         func2\

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

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

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

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

  713.         }                \

  714.         break;\

  715.     }\

  716. 

  717. 

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

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

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

  721. {

  722.     int i;

  723.     switch(c->dstFormat)

  724.     {

  725.     case PIX_FMT_BGR32:

  726.     case PIX_FMT_RGB32:

  727.         YSCALE_YUV_2_RGBX_C(uint32_t)

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

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

  730.         }

  731.         break;

  732.     case PIX_FMT_RGB24:

  733.         YSCALE_YUV_2_RGBX_C(uint8_t)

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

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

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

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

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

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

  740.             dest+=6;

  741.         }

  742.         break;

  743.     case PIX_FMT_BGR24:

  744.         YSCALE_YUV_2_RGBX_C(uint8_t)

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

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

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

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

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

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

  751.             dest+=6;

  752.         }

  753.         break;

  754.     case PIX_FMT_RGB565:

  755.     case PIX_FMT_BGR565:

  756.         {

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

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

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

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

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

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

  763.             YSCALE_YUV_2_RGBX_C(uint16_t)

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

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

  766.             }

  767.         }

  768.         break;

  769.     case PIX_FMT_RGB555:

  770.     case PIX_FMT_BGR555:

  771.         {

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

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

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

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

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

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

  778.             YSCALE_YUV_2_RGBX_C(uint16_t)

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

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

  781.             }

  782.         }

  783.         break;

  784.     case PIX_FMT_RGB8:

  785.     case PIX_FMT_BGR8:

  786.         {

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

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

  789.             YSCALE_YUV_2_RGBX_C(uint8_t)

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

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

  792.             }

  793.         }

  794.         break;

  795.     case PIX_FMT_RGB4:

  796.     case PIX_FMT_BGR4:

  797.         {

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

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

  800.             YSCALE_YUV_2_RGBX_C(uint8_t)

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

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

  803.             }

  804.         }

  805.         break;

  806.     case PIX_FMT_RGB4_BYTE:

  807.     case PIX_FMT_BGR4_BYTE:

  808.         {

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

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

  811.             YSCALE_YUV_2_RGBX_C(uint8_t)

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

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

  814.             }

  815.         }

  816.         break;

  817.     case PIX_FMT_MONOBLACK:

  818.         {

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

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

  821.             int acc=0;

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

  823.                 int j;

  824.                 int Y1=1<<18;

  825.                 int Y2=1<<18;

  826. 

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

  828.                 {

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

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

  831.                 }

  832.                 Y1>>=19;

  833.                 Y2>>=19;

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

  835.                 {

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

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

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

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

  840.                 }

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

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

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

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

  845.                     dest++;

  846.                 }

  847.             }

  848.         }

  849.         break;

  850.     case PIX_FMT_YUYV422:

  851.         YSCALE_YUV_2_PACKEDX_C(void)

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

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

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

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

  856.         }

  857.         break;

  858.     case PIX_FMT_UYVY422:

  859.         YSCALE_YUV_2_PACKEDX_C(void)

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

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

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

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

  864.         }

  865.         break;

  866.     }

  867. }

  868. 

  869. 

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

  871. //Plain C versions

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

  873. #define COMPILE_C

  874. #endif

  875. 

  876. #ifdef ARCH_POWERPC

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

  878. #define COMPILE_ALTIVEC

  879. #endif //HAVE_ALTIVEC

  880. #endif //ARCH_POWERPC

  881. 

  882. #if defined(ARCH_X86)

  883. 

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

  885. #define COMPILE_MMX

  886. #endif

  887. 

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

  889. #define COMPILE_MMX2

  890. #endif

  891. 

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

  893. #define COMPILE_3DNOW

  894. #endif

  895. #endif //ARCH_X86 || ARCH_X86_64

  896. 

  897. #undef HAVE_MMX

  898. #undef HAVE_MMX2

  899. #undef HAVE_3DNOW

  900. 

  901. #ifdef COMPILE_C

  902. #undef HAVE_MMX

  903. #undef HAVE_MMX2

  904. #undef HAVE_3DNOW

  905. #undef HAVE_ALTIVEC

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

  907. #include "swscale_template.c"

  908. #endif

  909. 

  910. #ifdef ARCH_POWERPC

  911. #ifdef COMPILE_ALTIVEC

  912. #undef RENAME

  913. #define HAVE_ALTIVEC

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

  915. #include "swscale_template.c"

  916. #endif

  917. #endif //ARCH_POWERPC

  918. 

  919. #if defined(ARCH_X86)

  920. 

  921. //X86 versions

  922. /*

  923. #undef RENAME

  924. #undef HAVE_MMX

  925. #undef HAVE_MMX2

  926. #undef HAVE_3DNOW

  927. #define ARCH_X86

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

  929. #include "swscale_template.c"

  930. */

  931. //MMX versions

  932. #ifdef COMPILE_MMX

  933. #undef RENAME

  934. #define HAVE_MMX

  935. #undef HAVE_MMX2

  936. #undef HAVE_3DNOW

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

  938. #include "swscale_template.c"

  939. #endif

  940. 

  941. //MMX2 versions

  942. #ifdef COMPILE_MMX2

  943. #undef RENAME

  944. #define HAVE_MMX

  945. #define HAVE_MMX2

  946. #undef HAVE_3DNOW

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

  948. #include "swscale_template.c"

  949. #endif

  950. 

  951. //3DNOW versions

  952. #ifdef COMPILE_3DNOW

  953. #undef RENAME

  954. #define HAVE_MMX

  955. #undef HAVE_MMX2

  956. #define HAVE_3DNOW

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

  958. #include "swscale_template.c"

  959. #endif

  960. 

  961. #endif //ARCH_X86 || ARCH_X86_64

  962. 

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

  964. 

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

  966. {

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

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

  969.     else                return getSplineCoeff(        0.0,

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

  971.                                                     c + 3.0*d,

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

  973.                                             dist-1.0);

  974. }

  975. 

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

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

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

  979. {

  980.     int i;

  981.     int filterSize;

  982.     int filter2Size;

  983.     int minFilterSize;

  984.     double *filter=NULL;

  985.     double *filter2=NULL;

  986. #if defined(ARCH_X86)

  987.     if (flags & SWS_CPU_CAPS_MMX)

  988.         asm volatile("emms\n\t"::: "memory"); //FIXME this should not be required but it IS (even for non-MMX versions)

  989. #endif

  990. 

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

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

  993. 

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

  995.     {

  996.         int i;

  997.         filterSize= 1;

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

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

  1000. 

  1001.         for (i=0; i<dstW; i++)

  1002.         {

  1003.             filter[i*filterSize]=1;

  1004.             (*filterPos)[i]=i;

  1005.         }

  1006. 

  1007.     }

  1008.     else if (flags&SWS_POINT) // lame looking point sampling mode

  1009.     {

  1010.         int i;

  1011.         int xDstInSrc;

  1012.         filterSize= 1;

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

  1014. 

  1015.         xDstInSrc= xInc/2 - 0x8000;

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

  1017.         {

  1018.             int xx= (xDstInSrc - ((filterSize-1)<<15) + (1<<15))>>16;

  1019. 

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

  1021.             filter[i]= 1.0;

  1022.             xDstInSrc+= xInc;

  1023.         }

  1024.     }

  1025.     else if ((xInc <= (1<<16) && (flags&SWS_AREA)) || (flags&SWS_FAST_BILINEAR)) // bilinear upscale

  1026.     {

  1027.         int i;

  1028.         int xDstInSrc;

  1029.         if      (flags&SWS_BICUBIC) filterSize= 4;

  1030.         else if (flags&SWS_X      ) filterSize= 4;

  1031.         else                        filterSize= 2; // SWS_BILINEAR / SWS_AREA

  1032.         filter= av_malloc(dstW*sizeof(double)*filterSize);

  1033. 

  1034.         xDstInSrc= xInc/2 - 0x8000;

  1035.         for (i=0; i<dstW; i++)

  1036.         {

  1037.             int xx= (xDstInSrc - ((filterSize-1)<<15) + (1<<15))>>16;

  1038.             int j;

  1039. 

  1040.             (*filterPos)[i]= xx;

  1041.                 //Bilinear upscale / linear interpolate / Area averaging

  1042.                 for (j=0; j<filterSize; j++)

  1043.                 {

  1044.                     double d= FFABS((xx<<16) - xDstInSrc)/(double)(1<<16);

  1045.                     double coeff= 1.0 - d;

  1046.                     if (coeff<0) coeff=0;

  1047.                     filter[i*filterSize + j]= coeff;

  1048.                     xx++;

  1049.                 }

  1050.             xDstInSrc+= xInc;

  1051.         }

  1052.     }

  1053.     else

  1054.     {

  1055.         double xDstInSrc;

  1056.         double sizeFactor, filterSizeInSrc;

  1057.         const double xInc1= (double)xInc / (double)(1<<16);

  1058. 

  1059.         if      (flags&SWS_BICUBIC)      sizeFactor=  4.0;

  1060.         else if (flags&SWS_X)            sizeFactor=  8.0;

  1061.         else if (flags&SWS_AREA)         sizeFactor=  1.0; //downscale only, for upscale it is bilinear

  1062.         else if (flags&SWS_GAUSS)        sizeFactor=  8.0;   // infinite ;)

  1063.         else if (flags&SWS_LANCZOS)      sizeFactor= param[0] != SWS_PARAM_DEFAULT ? 2.0*param[0] : 6.0;

  1064.         else if (flags&SWS_SINC)         sizeFactor= 20.0; // infinite ;)

  1065.         else if (flags&SWS_SPLINE)       sizeFactor= 20.0;  // infinite ;)

  1066.         else if (flags&SWS_BILINEAR)     sizeFactor=  2.0;

  1067.         else {

  1068.             sizeFactor= 0.0; //GCC warning killer

  1069.             ASSERT(0)

  1070.         }

  1071. 

  1072.         if (xInc1 <= 1.0)       filterSizeInSrc= sizeFactor; // upscale

  1073.         else                    filterSizeInSrc= sizeFactor*srcW / (double)dstW;

  1074. 

  1075.         filterSize= (int)ceil(1 + filterSizeInSrc); // will be reduced later if possible

  1076.         if (filterSize > srcW-2) filterSize=srcW-2;

  1077. 

  1078.         filter= av_malloc(dstW*sizeof(double)*filterSize);

  1079. 

  1080.         xDstInSrc= xInc1 / 2.0 - 0.5;

  1081.         for (i=0; i<dstW; i++)

  1082.         {

  1083.             int xx= (int)(xDstInSrc - (filterSize-1)*0.5 + 0.5);

  1084.             int j;

  1085.             (*filterPos)[i]= xx;

  1086.             for (j=0; j<filterSize; j++)

  1087.             {

  1088.                 double d= FFABS(xx - xDstInSrc)/filterSizeInSrc*sizeFactor;

  1089.                 double coeff;

  1090.                 if (flags & SWS_BICUBIC)

  1091.                 {

  1092.                     double B= param[0] != SWS_PARAM_DEFAULT ? param[0] : 0.0;

  1093.                     double C= param[1] != SWS_PARAM_DEFAULT ? param[1] : 0.6;

  1094. 

  1095.                     if (d<1.0)

  1096.                         coeff = (12-9*B-6*C)*d*d*d + (-18+12*B+6*C)*d*d + 6-2*B;

  1097.                     else if (d<2.0)

  1098.                         coeff = (-B-6*C)*d*d*d + (6*B+30*C)*d*d + (-12*B-48*C)*d +8*B+24*C;

  1099.                     else

  1100.                         coeff=0.0;

  1101.                 }

  1102. /*                else if (flags & SWS_X)

  1103.                 {

  1104.                     double p= param ? param*0.01 : 0.3;

  1105.                     coeff = d ? sin(d*PI)/(d*PI) : 1.0;

  1106.                     coeff*= pow(2.0, - p*d*d);

  1107.                 }*/

  1108.                 else if (flags & SWS_X)

  1109.                 {

  1110.                     double A= param[0] != SWS_PARAM_DEFAULT ? param[0] : 1.0;

  1111. 

  1112.                     if (d<1.0)

  1113.                         coeff = cos(d*PI);

  1114.                     else

  1115.                         coeff=-1.0;

  1116.                     if (coeff<0.0)      coeff= -pow(-coeff, A);

  1117.                     else                coeff=  pow( coeff, A);

  1118.                     coeff= coeff*0.5 + 0.5;

  1119.                 }

  1120.                 else if (flags & SWS_AREA)

  1121.                 {

  1122.                     double srcPixelSize= 1.0/xInc1;

  1123.                     if      (d + srcPixelSize/2 < 0.5) coeff= 1.0;

  1124.                     else if (d - srcPixelSize/2 < 0.5) coeff= (0.5-d)/srcPixelSize + 0.5;

  1125.                     else coeff=0.0;

  1126.                 }

  1127.                 else if (flags & SWS_GAUSS)

  1128.                 {

  1129.                     double p= param[0] != SWS_PARAM_DEFAULT ? param[0] : 3.0;

  1130.                     coeff = pow(2.0, - p*d*d);

  1131.                 }

  1132.                 else if (flags & SWS_SINC)

  1133.                 {

  1134.                     coeff = d ? sin(d*PI)/(d*PI) : 1.0;

  1135.                 }

  1136.                 else if (flags & SWS_LANCZOS)

  1137.                 {

  1138.                     double p= param[0] != SWS_PARAM_DEFAULT ? param[0] : 3.0;

  1139.                     coeff = d ? sin(d*PI)*sin(d*PI/p)/(d*d*PI*PI/p) : 1.0;

  1140.                     if (d>p) coeff=0;

  1141.                 }

  1142.                 else if (flags & SWS_BILINEAR)

  1143.                 {

  1144.                     coeff= 1.0 - d;

  1145.                     if (coeff<0) coeff=0;

  1146.                 }

  1147.                 else if (flags & SWS_SPLINE)

  1148.                 {

  1149.                     double p=-2.196152422706632;

  1150.                     coeff = getSplineCoeff(1.0, 0.0, p, -p-1.0, d);

  1151.                 }

  1152.                 else {

  1153.                     coeff= 0.0; //GCC warning killer

  1154.                     ASSERT(0)

  1155.                 }

  1156. 

  1157.                 filter[i*filterSize + j]= coeff;

  1158.                 xx++;

  1159.             }

  1160.             xDstInSrc+= xInc1;

  1161.         }

  1162.     }

  1163. 

  1164.     /* apply src & dst Filter to filter -> filter2

  1165.        av_free(filter);

  1166.     */

  1167.     ASSERT(filterSize>0)

  1168.     filter2Size= filterSize;

  1169.     if (srcFilter) filter2Size+= srcFilter->length - 1;

  1170.     if (dstFilter) filter2Size+= dstFilter->length - 1;

  1171.     ASSERT(filter2Size>0)

  1172.     filter2= av_malloc(filter2Size*dstW*sizeof(double));

  1173. 

  1174.     for (i=0; i<dstW; i++)

  1175.     {

  1176.         int j;

  1177.         SwsVector scaleFilter;

  1178.         SwsVector *outVec;

  1179. 

  1180.         scaleFilter.coeff= filter + i*filterSize;

  1181.         scaleFilter.length= filterSize;

  1182. 

  1183.         if (srcFilter) outVec= sws_getConvVec(srcFilter, &scaleFilter);

  1184.         else           outVec= &scaleFilter;

  1185. 

  1186.         ASSERT(outVec->length == filter2Size)

  1187.         //FIXME dstFilter

  1188. 

  1189.         for (j=0; j<outVec->length; j++)

  1190.         {

  1191.             filter2[i*filter2Size + j]= outVec->coeff[j];

  1192.         }

  1193. 

  1194.         (*filterPos)[i]+= (filterSize-1)/2 - (filter2Size-1)/2;

  1195. 

  1196.         if (outVec != &scaleFilter) sws_freeVec(outVec);

  1197.     }

  1198.     av_free(filter); filter=NULL;

  1199. 

  1200.     /* try to reduce the filter-size (step1 find size and shift left) */

  1201.     // Assume it is near normalized (*0.5 or *2.0 is OK but * 0.001 is not).

  1202.     minFilterSize= 0;

  1203.     for (i=dstW-1; i>=0; i--)

  1204.     {

  1205.         int min= filter2Size;

  1206.         int j;

  1207.         double cutOff=0.0;

  1208. 

  1209.         /* get rid off near zero elements on the left by shifting left */

  1210.         for (j=0; j<filter2Size; j++)

  1211.         {

  1212.             int k;

  1213.             cutOff += FFABS(filter2[i*filter2Size]);

  1214. 

  1215.             if (cutOff > SWS_MAX_REDUCE_CUTOFF) break;

  1216. 

  1217.             /* preserve monotonicity because the core can't handle the filter otherwise */

  1218.             if (i<dstW-1 && (*filterPos)[i] >= (*filterPos)[i+1]) break;

  1219. 

  1220.             // Move filter coeffs left

  1221.             for (k=1; k<filter2Size; k++)

  1222.                 filter2[i*filter2Size + k - 1]= filter2[i*filter2Size + k];

  1223.             filter2[i*filter2Size + k - 1]= 0.0;

  1224.             (*filterPos)[i]++;

  1225.         }

  1226. 

  1227.         cutOff=0.0;

  1228.         /* count near zeros on the right */

  1229.         for (j=filter2Size-1; j>0; j--)

  1230.         {

  1231.             cutOff += FFABS(filter2[i*filter2Size + j]);

  1232. 

  1233.             if (cutOff > SWS_MAX_REDUCE_CUTOFF) break;

  1234.             min--;

  1235.         }

  1236. 

  1237.         if (min>minFilterSize) minFilterSize= min;

  1238.     }

  1239. 

  1240.     if (flags & SWS_CPU_CAPS_ALTIVEC) {

  1241.         // we can handle the special case 4,

  1242.         // so we don't want to go to the full 8

  1243.         if (minFilterSize < 5)

  1244.             filterAlign = 4;

  1245. 

  1246.         // we really don't want to waste our time

  1247.         // doing useless computation, so fall-back on

  1248.         // the scalar C code for very small filter.

  1249.         // vectorizing is worth it only if you have

  1250.         // decent-sized vector.

  1251.         if (minFilterSize < 3)

  1252.             filterAlign = 1;

  1253.     }

  1254. 

  1255.     if (flags & SWS_CPU_CAPS_MMX) {

  1256.         // special case for unscaled vertical filtering

  1257.         if (minFilterSize == 1 && filterAlign == 2)

  1258.             filterAlign= 1;

  1259.     }

  1260. 

  1261.     ASSERT(minFilterSize > 0)

  1262.     filterSize= (minFilterSize +(filterAlign-1)) & (~(filterAlign-1));

  1263.     ASSERT(filterSize > 0)

  1264.     filter= av_malloc(filterSize*dstW*sizeof(double));

  1265.     if (filterSize >= MAX_FILTER_SIZE)

  1266.         return -1;

  1267.     *outFilterSize= filterSize;

  1268. 

  1269.     if (flags&SWS_PRINT_INFO)

  1270.         av_log(NULL, AV_LOG_VERBOSE, "SwScaler: reducing / aligning filtersize %d -> %d\n", filter2Size, filterSize);

  1271.     /* try to reduce the filter-size (step2 reduce it) */

  1272.     for (i=0; i<dstW; i++)

  1273.     {

  1274.         int j;

  1275. 

  1276.         for (j=0; j<filterSize; j++)

  1277.         {

  1278.             if (j>=filter2Size) filter[i*filterSize + j]= 0.0;

  1279.             else               filter[i*filterSize + j]= filter2[i*filter2Size + j];

  1280.         }

  1281.     }

  1282.     av_free(filter2); filter2=NULL;

  1283. 

  1284. 

  1285.     //FIXME try to align filterpos if possible

  1286. 

  1287.     //fix borders

  1288.     for (i=0; i<dstW; i++)

  1289.     {

  1290.         int j;

  1291.         if ((*filterPos)[i] < 0)

  1292.         {

  1293.             // Move filter coeffs left to compensate for filterPos

  1294.             for (j=1; j<filterSize; j++)

  1295.             {

  1296.                 int left= FFMAX(j + (*filterPos)[i], 0);

  1297.                 filter[i*filterSize + left] += filter[i*filterSize + j];

  1298.                 filter[i*filterSize + j]=0;

  1299.             }

  1300.             (*filterPos)[i]= 0;

  1301.         }

  1302. 

  1303.         if ((*filterPos)[i] + filterSize > srcW)

  1304.         {

  1305.             int shift= (*filterPos)[i] + filterSize - srcW;

  1306.             // Move filter coeffs right to compensate for filterPos

  1307.             for (j=filterSize-2; j>=0; j--)

  1308.             {

  1309.                 int right= FFMIN(j + shift, filterSize-1);

  1310.                 filter[i*filterSize +right] += filter[i*filterSize +j];

  1311.                 filter[i*filterSize +j]=0;

  1312.             }

  1313.             (*filterPos)[i]= srcW - filterSize;

  1314.         }

  1315.     }

  1316. 

  1317.     // Note the +1 is for the MMXscaler which reads over the end

  1318.     /* align at 16 for AltiVec (needed by hScale_altivec_real) */

  1319.     *outFilter= av_mallocz(*outFilterSize*(dstW+1)*sizeof(int16_t));

  1320. 

  1321.     /* Normalize & Store in outFilter */

  1322.     for (i=0; i<dstW; i++)

  1323.     {

  1324.         int j;

  1325.         double error=0;

  1326.         double sum=0;

  1327.         double scale= one;

  1328. 

  1329.         for (j=0; j<filterSize; j++)

  1330.         {

  1331.             sum+= filter[i*filterSize + j];

  1332.         }

  1333.         scale/= sum;

  1334.         for (j=0; j<*outFilterSize; j++)

  1335.         {

  1336.             double v= filter[i*filterSize + j]*scale + error;

  1337.             int intV= floor(v + 0.5);

  1338.             (*outFilter)[i*(*outFilterSize) + j]= intV;

  1339.             error = v - intV;

  1340.         }

  1341.     }

  1342. 

  1343.     (*filterPos)[dstW]= (*filterPos)[dstW-1]; // the MMX scaler will read over the end

  1344.     for (i=0; i<*outFilterSize; i++)

  1345.     {

  1346.         int j= dstW*(*outFilterSize);

  1347.         (*outFilter)[j + i]= (*outFilter)[j + i - (*outFilterSize)];

  1348.     }

  1349. 

  1350.     av_free(filter);

  1351.     return 0;

  1352. }

  1353. 

  1354. #ifdef COMPILE_MMX2

  1355. static void initMMX2HScaler(int dstW, int xInc, uint8_t *funnyCode, int16_t *filter, int32_t *filterPos, int numSplits)

  1356. {

  1357.     uint8_t *fragmentA;

  1358.     long imm8OfPShufW1A;

  1359.     long imm8OfPShufW2A;

  1360.     long fragmentLengthA;

  1361.     uint8_t *fragmentB;

  1362.     long imm8OfPShufW1B;

  1363.     long imm8OfPShufW2B;

  1364.     long fragmentLengthB;

  1365.     int fragmentPos;

  1366. 

  1367.     int xpos, i;

  1368. 

  1369.     // create an optimized horizontal scaling routine

  1370. 

  1371.     //code fragment

  1372. 

  1373.     asm volatile(

  1374.         "jmp                         9f                 \n\t"

  1375.     // Begin

  1376.         "0:                                             \n\t"

  1377.         "movq    (%%"REG_d", %%"REG_a"), %%mm3          \n\t"

  1378.         "movd    (%%"REG_c", %%"REG_S"), %%mm0          \n\t"

  1379.         "movd   1(%%"REG_c", %%"REG_S"), %%mm1          \n\t"

  1380.         "punpcklbw                %%mm7, %%mm1          \n\t"

  1381.         "punpcklbw                %%mm7, %%mm0          \n\t"

  1382.         "pshufw                   $0xFF, %%mm1, %%mm1   \n\t"

  1383.         "1:                                             \n\t"

  1384.         "pshufw                   $0xFF, %%mm0, %%mm0   \n\t"

  1385.         "2:                                             \n\t"

  1386.         "psubw                    %%mm1, %%mm0          \n\t"

  1387.         "movl   8(%%"REG_b", %%"REG_a"), %%esi          \n\t"

  1388.         "pmullw                   %%mm3, %%mm0          \n\t"

  1389.         "psllw                       $7, %%mm1          \n\t"

  1390.         "paddw                    %%mm1, %%mm0          \n\t"

  1391. 

  1392.         "movq                     %%mm0, (%%"REG_D", %%"REG_a") \n\t"

  1393. 

  1394.         "add                         $8, %%"REG_a"      \n\t"

  1395.     // End

  1396.         "9:                                             \n\t"

  1397. //        "int $3                                         \n\t"

  1398.         "lea                         0b, %0             \n\t"

  1399.         "lea                         1b, %1             \n\t"

  1400.         "lea                         2b, %2             \n\t"

  1401.         "dec                         %1                 \n\t"

  1402.         "dec                         %2                 \n\t"

  1403.         "sub                         %0, %1             \n\t"

  1404.         "sub                         %0, %2             \n\t"

  1405.         "lea                         9b, %3             \n\t"

  1406.         "sub                         %0, %3             \n\t"

  1407. 

  1408. 

  1409.         :"=r" (fragmentA), "=r" (imm8OfPShufW1A), "=r" (imm8OfPShufW2A),

  1410.         "=r" (fragmentLengthA)

  1411.     );

  1412. 

  1413.     asm volatile(

  1414.         "jmp                         9f                 \n\t"

  1415.     // Begin

  1416.         "0:                                             \n\t"

  1417.         "movq    (%%"REG_d", %%"REG_a"), %%mm3          \n\t"

  1418.         "movd    (%%"REG_c", %%"REG_S"), %%mm0          \n\t"

  1419.         "punpcklbw                %%mm7, %%mm0          \n\t"

  1420.         "pshufw                   $0xFF, %%mm0, %%mm1   \n\t"

  1421.         "1:                                             \n\t"

  1422.         "pshufw                   $0xFF, %%mm0, %%mm0   \n\t"

  1423.         "2:                                             \n\t"

  1424.         "psubw                    %%mm1, %%mm0          \n\t"

  1425.         "movl   8(%%"REG_b", %%"REG_a"), %%esi          \n\t"

  1426.         "pmullw                   %%mm3, %%mm0          \n\t"

  1427.         "psllw                       $7, %%mm1          \n\t"

  1428.         "paddw                    %%mm1, %%mm0          \n\t"

  1429. 

  1430.         "movq                     %%mm0, (%%"REG_D", %%"REG_a") \n\t"

  1431. 

  1432.         "add                         $8, %%"REG_a"      \n\t"

  1433.     // End

  1434.         "9:                                             \n\t"

  1435. //        "int                       $3                   \n\t"

  1436.         "lea                         0b, %0             \n\t"

  1437.         "lea                         1b, %1             \n\t"

  1438.         "lea                         2b, %2             \n\t"

  1439.         "dec                         %1                 \n\t"

  1440.         "dec                         %2                 \n\t"

  1441.         "sub                         %0, %1             \n\t"

  1442.         "sub                         %0, %2             \n\t"

  1443.         "lea                         9b, %3             \n\t"

  1444.         "sub                         %0, %3             \n\t"

  1445. 

  1446. 

  1447.         :"=r" (fragmentB), "=r" (imm8OfPShufW1B), "=r" (imm8OfPShufW2B),

  1448.         "=r" (fragmentLengthB)

  1449.     );

  1450. 

  1451.     xpos= 0; //lumXInc/2 - 0x8000; // difference between pixel centers

  1452.     fragmentPos=0;

  1453. 

  1454.     for (i=0; i<dstW/numSplits; i++)

  1455.     {

  1456.         int xx=xpos>>16;

  1457. 

  1458.         if ((i&3) == 0)

  1459.         {

  1460.             int a=0;

  1461.             int b=((xpos+xInc)>>16) - xx;

  1462.             int c=((xpos+xInc*2)>>16) - xx;

  1463.             int d=((xpos+xInc*3)>>16) - xx;

  1464. 

  1465.             filter[i  ] = (( xpos         & 0xFFFF) ^ 0xFFFF)>>9;

  1466.             filter[i+1] = (((xpos+xInc  ) & 0xFFFF) ^ 0xFFFF)>>9;

  1467.             filter[i+2] = (((xpos+xInc*2) & 0xFFFF) ^ 0xFFFF)>>9;

  1468.             filter[i+3] = (((xpos+xInc*3) & 0xFFFF) ^ 0xFFFF)>>9;

  1469.             filterPos[i/2]= xx;

  1470. 

  1471.             if (d+1<4)

  1472.             {

  1473.                 int maxShift= 3-(d+1);

  1474.                 int shift=0;

  1475. 

  1476.                 memcpy(funnyCode + fragmentPos, fragmentB, fragmentLengthB);

  1477. 

  1478.                 funnyCode[fragmentPos + imm8OfPShufW1B]=

  1479.                     (a+1) | ((b+1)<<2) | ((c+1)<<4) | ((d+1)<<6);

  1480.                 funnyCode[fragmentPos + imm8OfPShufW2B]=

  1481.                     a | (b<<2) | (c<<4) | (d<<6);

  1482. 

  1483.                 if (i+3>=dstW) shift=maxShift; //avoid overread

  1484.                 else if ((filterPos[i/2]&3) <= maxShift) shift=filterPos[i/2]&3; //Align

  1485. 

  1486.                 if (shift && i>=shift)

  1487.                 {

  1488.                     funnyCode[fragmentPos + imm8OfPShufW1B]+= 0x55*shift;

  1489.                     funnyCode[fragmentPos + imm8OfPShufW2B]+= 0x55*shift;

  1490.                     filterPos[i/2]-=shift;

  1491.                 }

  1492. 

  1493.                 fragmentPos+= fragmentLengthB;

  1494.             }

  1495.             else

  1496.             {

  1497.                 int maxShift= 3-d;

  1498.                 int shift=0;

  1499. 

  1500.                 memcpy(funnyCode + fragmentPos, fragmentA, fragmentLengthA);

  1501. 

  1502.                 funnyCode[fragmentPos + imm8OfPShufW1A]=

  1503.                 funnyCode[fragmentPos + imm8OfPShufW2A]=

  1504.                     a | (b<<2) | (c<<4) | (d<<6);

  1505. 

  1506.                 if (i+4>=dstW) shift=maxShift; //avoid overread

  1507.                 else if ((filterPos[i/2]&3) <= maxShift) shift=filterPos[i/2]&3; //partial align

  1508. 

  1509.                 if (shift && i>=shift)

  1510.                 {

  1511.                     funnyCode[fragmentPos + imm8OfPShufW1A]+= 0x55*shift;

  1512.                     funnyCode[fragmentPos + imm8OfPShufW2A]+= 0x55*shift;

  1513.                     filterPos[i/2]-=shift;

  1514.                 }

  1515. 

  1516.                 fragmentPos+= fragmentLengthA;

  1517.             }

  1518. 

  1519.             funnyCode[fragmentPos]= RET;

  1520.         }

  1521.         xpos+=xInc;

  1522.     }

  1523.     filterPos[i/2]= xpos>>16; // needed to jump to the next part

  1524. }

  1525. #endif /* COMPILE_MMX2 */

  1526. 

  1527. static void globalInit(void){

  1528.     // generating tables:

  1529.     int i;

  1530.     for (i=0; i<768; i++){

  1531.         int c= av_clip_uint8(i-256);

  1532.         clip_table[i]=c;

  1533.     }

  1534. }

  1535. 

  1536. static SwsFunc getSwsFunc(int flags){

  1537. 

  1538. #if defined(RUNTIME_CPUDETECT) && defined (CONFIG_GPL)

  1539. #if defined(ARCH_X86)

  1540.     // ordered per speed fasterst first

  1541.     if (flags & SWS_CPU_CAPS_MMX2)

  1542.         return swScale_MMX2;

  1543.     else if (flags & SWS_CPU_CAPS_3DNOW)

  1544.         return swScale_3DNow;

  1545.     else if (flags & SWS_CPU_CAPS_MMX)

  1546.         return swScale_MMX;

  1547.     else

  1548.         return swScale_C;

  1549. 

  1550. #else

  1551. #ifdef ARCH_POWERPC

  1552.     if (flags & SWS_CPU_CAPS_ALTIVEC)

  1553.         return swScale_altivec;

  1554.     else

  1555.         return swScale_C;

  1556. #endif

  1557.     return swScale_C;

  1558. #endif /* defined(ARCH_X86) */

  1559. #else //RUNTIME_CPUDETECT

  1560. #ifdef HAVE_MMX2

  1561.     return swScale_MMX2;

  1562. #elif defined (HAVE_3DNOW)

  1563.     return swScale_3DNow;

  1564. #elif defined (HAVE_MMX)

  1565.     return swScale_MMX;

  1566. #elif defined (HAVE_ALTIVEC)

  1567.     return swScale_altivec;

  1568. #else

  1569.     return swScale_C;

  1570. #endif

  1571. #endif //!RUNTIME_CPUDETECT

  1572. }

  1573. 

  1574. static int PlanarToNV12Wrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1575.                                int srcSliceH, uint8_t* dstParam[], int dstStride[]){

  1576.     uint8_t *dst=dstParam[0] + dstStride[0]*srcSliceY;

  1577.     /* Copy Y plane */

  1578.     if (dstStride[0]==srcStride[0] && srcStride[0] > 0)

  1579.         memcpy(dst, src[0], srcSliceH*dstStride[0]);

  1580.     else

  1581.     {

  1582.         int i;

  1583.         uint8_t *srcPtr= src[0];

  1584.         uint8_t *dstPtr= dst;

  1585.         for (i=0; i<srcSliceH; i++)

  1586.         {

  1587.             memcpy(dstPtr, srcPtr, c->srcW);

  1588.             srcPtr+= srcStride[0];

  1589.             dstPtr+= dstStride[0];

  1590.         }

  1591.     }

  1592.     dst = dstParam[1] + dstStride[1]*srcSliceY/2;

  1593.     if (c->dstFormat == PIX_FMT_NV12)

  1594.         interleaveBytes( src[1],src[2],dst,c->srcW/2,srcSliceH/2,srcStride[1],srcStride[2],dstStride[0] );

  1595.     else

  1596.         interleaveBytes( src[2],src[1],dst,c->srcW/2,srcSliceH/2,srcStride[2],srcStride[1],dstStride[0] );

  1597. 

  1598.     return srcSliceH;

  1599. }

  1600. 

  1601. static int PlanarToYuy2Wrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1602.                                int srcSliceH, uint8_t* dstParam[], int dstStride[]){

  1603.     uint8_t *dst=dstParam[0] + dstStride[0]*srcSliceY;

  1604. 

  1605.     yv12toyuy2( src[0],src[1],src[2],dst,c->srcW,srcSliceH,srcStride[0],srcStride[1],dstStride[0] );

  1606. 

  1607.     return srcSliceH;

  1608. }

  1609. 

  1610. static int PlanarToUyvyWrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1611.                                int srcSliceH, uint8_t* dstParam[], int dstStride[]){

  1612.     uint8_t *dst=dstParam[0] + dstStride[0]*srcSliceY;

  1613. 

  1614.     yv12touyvy( src[0],src[1],src[2],dst,c->srcW,srcSliceH,srcStride[0],srcStride[1],dstStride[0] );

  1615. 

  1616.     return srcSliceH;

  1617. }

  1618. 

  1619. /* {RGB,BGR}{15,16,24,32} -> {RGB,BGR}{15,16,24,32} */

  1620. static int rgb2rgbWrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1621.                           int srcSliceH, uint8_t* dst[], int dstStride[]){

  1622.     const int srcFormat= c->srcFormat;

  1623.     const int dstFormat= c->dstFormat;

  1624.     const int srcBpp= (fmt_depth(srcFormat) + 7) >> 3;

  1625.     const int dstBpp= (fmt_depth(dstFormat) + 7) >> 3;

  1626.     const int srcId= fmt_depth(srcFormat) >> 2; /* 1:0, 4:1, 8:2, 15:3, 16:4, 24:6, 32:8 */

  1627.     const int dstId= fmt_depth(dstFormat) >> 2;

  1628.     void (*conv)(const uint8_t *src, uint8_t *dst, long src_size)=NULL;

  1629. 

  1630.     /* BGR -> BGR */

  1631.     if (  (isBGR(srcFormat) && isBGR(dstFormat))

  1632.        || (isRGB(srcFormat) && isRGB(dstFormat))){

  1633.         switch(srcId | (dstId<<4)){

  1634.         case 0x34: conv= rgb16to15; break;

  1635.         case 0x36: conv= rgb24to15; break;

  1636.         case 0x38: conv= rgb32to15; break;

  1637.         case 0x43: conv= rgb15to16; break;

  1638.         case 0x46: conv= rgb24to16; break;

  1639.         case 0x48: conv= rgb32to16; break;

  1640.         case 0x63: conv= rgb15to24; break;

  1641.         case 0x64: conv= rgb16to24; break;

  1642.         case 0x68: conv= rgb32to24; break;

  1643.         case 0x83: conv= rgb15to32; break;

  1644.         case 0x84: conv= rgb16to32; break;

  1645.         case 0x86: conv= rgb24to32; break;

  1646.         default: av_log(c, AV_LOG_ERROR, "swScaler: internal error %s -> %s converter\n",

  1647.                         sws_format_name(srcFormat), sws_format_name(dstFormat)); break;

  1648.         }

  1649.     }else if (  (isBGR(srcFormat) && isRGB(dstFormat))

  1650.              || (isRGB(srcFormat) && isBGR(dstFormat))){

  1651.         switch(srcId | (dstId<<4)){

  1652.         case 0x33: conv= rgb15tobgr15; break;

  1653.         case 0x34: conv= rgb16tobgr15; break;

  1654.         case 0x36: conv= rgb24tobgr15; break;

  1655.         case 0x38: conv= rgb32tobgr15; break;

  1656.         case 0x43: conv= rgb15tobgr16; break;

  1657.         case 0x44: conv= rgb16tobgr16; break;

  1658.         case 0x46: conv= rgb24tobgr16; break;

  1659.         case 0x48: conv= rgb32tobgr16; break;

  1660.         case 0x63: conv= rgb15tobgr24; break;

  1661.         case 0x64: conv= rgb16tobgr24; break;

  1662.         case 0x66: conv= rgb24tobgr24; break;

  1663.         case 0x68: conv= rgb32tobgr24; break;

  1664.         case 0x83: conv= rgb15tobgr32; break;

  1665.         case 0x84: conv= rgb16tobgr32; break;

  1666.         case 0x86: conv= rgb24tobgr32; break;

  1667.         case 0x88: conv= rgb32tobgr32; break;

  1668.         default: av_log(c, AV_LOG_ERROR, "swScaler: internal error %s -> %s converter\n",

  1669.                         sws_format_name(srcFormat), sws_format_name(dstFormat)); break;

  1670.         }

  1671.     }else{

  1672.         av_log(c, AV_LOG_ERROR, "swScaler: internal error %s -> %s converter\n",

  1673.                sws_format_name(srcFormat), sws_format_name(dstFormat));

  1674.     }

  1675. 

  1676.     if(conv)

  1677.     {

  1678.         if (dstStride[0]*srcBpp == srcStride[0]*dstBpp)

  1679.             conv(src[0], dst[0] + dstStride[0]*srcSliceY, srcSliceH*srcStride[0]);

  1680.         else

  1681.         {

  1682.             int i;

  1683.             uint8_t *srcPtr= src[0];

  1684.             uint8_t *dstPtr= dst[0] + dstStride[0]*srcSliceY;

  1685. 

  1686.             for (i=0; i<srcSliceH; i++)

  1687.             {

  1688.                 conv(srcPtr, dstPtr, c->srcW*srcBpp);

  1689.                 srcPtr+= srcStride[0];

  1690.                 dstPtr+= dstStride[0];

  1691.             }

  1692.         }

  1693.     }

  1694.     return srcSliceH;

  1695. }

  1696. 

  1697. static int bgr24toyv12Wrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1698.                               int srcSliceH, uint8_t* dst[], int dstStride[]){

  1699. 

  1700.     rgb24toyv12(

  1701.         src[0],

  1702.         dst[0]+ srcSliceY    *dstStride[0],

  1703.         dst[1]+(srcSliceY>>1)*dstStride[1],

  1704.         dst[2]+(srcSliceY>>1)*dstStride[2],

  1705.         c->srcW, srcSliceH,

  1706.         dstStride[0], dstStride[1], srcStride[0]);

  1707.     return srcSliceH;

  1708. }

  1709. 

  1710. static int yvu9toyv12Wrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1711.                              int srcSliceH, uint8_t* dst[], int dstStride[]){

  1712.     int i;

  1713. 

  1714.     /* copy Y */

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

  1716.         memcpy(dst[0]+ srcSliceY*dstStride[0], src[0], srcStride[0]*srcSliceH);

  1717.     else{

  1718.         uint8_t *srcPtr= src[0];

  1719.         uint8_t *dstPtr= dst[0] + dstStride[0]*srcSliceY;

  1720. 

  1721.         for (i=0; i<srcSliceH; i++)

  1722.         {

  1723.             memcpy(dstPtr, srcPtr, c->srcW);

  1724.             srcPtr+= srcStride[0];

  1725.             dstPtr+= dstStride[0];

  1726.         }

  1727.     }

  1728. 

  1729.     if (c->dstFormat==PIX_FMT_YUV420P){

  1730.         planar2x(src[1], dst[1], c->chrSrcW, c->chrSrcH, srcStride[1], dstStride[1]);

  1731.         planar2x(src[2], dst[2], c->chrSrcW, c->chrSrcH, srcStride[2], dstStride[2]);

  1732.     }else{

  1733.         planar2x(src[1], dst[2], c->chrSrcW, c->chrSrcH, srcStride[1], dstStride[2]);

  1734.         planar2x(src[2], dst[1], c->chrSrcW, c->chrSrcH, srcStride[2], dstStride[1]);

  1735.     }

  1736.     return srcSliceH;

  1737. }

  1738. 

  1739. /* unscaled copy like stuff (assumes nearly identical formats) */

  1740. static int simpleCopy(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1741.                       int srcSliceH, uint8_t* dst[], int dstStride[]){

  1742. 

  1743.     if (isPacked(c->srcFormat))

  1744.     {

  1745.         if (dstStride[0]==srcStride[0] && srcStride[0] > 0)

  1746.             memcpy(dst[0] + dstStride[0]*srcSliceY, src[0], srcSliceH*dstStride[0]);

  1747.         else

  1748.         {

  1749.             int i;

  1750.             uint8_t *srcPtr= src[0];

  1751.             uint8_t *dstPtr= dst[0] + dstStride[0]*srcSliceY;

  1752.             int length=0;

  1753. 

  1754.             /* universal length finder */

  1755.             while(length+c->srcW <= FFABS(dstStride[0])

  1756.                && length+c->srcW <= FFABS(srcStride[0])) length+= c->srcW;

  1757.             ASSERT(length!=0);

  1758. 

  1759.             for (i=0; i<srcSliceH; i++)

  1760.             {

  1761.                 memcpy(dstPtr, srcPtr, length);

  1762.                 srcPtr+= srcStride[0];

  1763.                 dstPtr+= dstStride[0];

  1764.             }

  1765.         }

  1766.     }

  1767.     else

  1768.     { /* Planar YUV or gray */

  1769.         int plane;

  1770.         for (plane=0; plane<3; plane++)

  1771.         {

  1772.             int length= plane==0 ? c->srcW  : -((-c->srcW  )>>c->chrDstHSubSample);

  1773.             int y=      plane==0 ? srcSliceY: -((-srcSliceY)>>c->chrDstVSubSample);

  1774.             int height= plane==0 ? srcSliceH: -((-srcSliceH)>>c->chrDstVSubSample);

  1775. 

  1776.             if ((isGray(c->srcFormat) || isGray(c->dstFormat)) && plane>0)

  1777.             {

  1778.                 if (!isGray(c->dstFormat))

  1779.                     memset(dst[plane], 128, dstStride[plane]*height);

  1780.             }

  1781.             else

  1782.             {

  1783.                 if (dstStride[plane]==srcStride[plane] && srcStride[plane] > 0)

  1784.                     memcpy(dst[plane] + dstStride[plane]*y, src[plane], height*dstStride[plane]);

  1785.                 else

  1786.                 {

  1787.                     int i;

  1788.                     uint8_t *srcPtr= src[plane];

  1789.                     uint8_t *dstPtr= dst[plane] + dstStride[plane]*y;

  1790.                     for (i=0; i<height; i++)

  1791.                     {

  1792.                         memcpy(dstPtr, srcPtr, length);

  1793.                         srcPtr+= srcStride[plane];

  1794.                         dstPtr+= dstStride[plane];

  1795.                     }

  1796.                 }

  1797.             }

  1798.         }

  1799.     }

  1800.     return srcSliceH;

  1801. }

  1802. 

  1803. static int gray16togray(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1804.                         int srcSliceH, uint8_t* dst[], int dstStride[]){

  1805. 

  1806.     int length= c->srcW;

  1807.     int y=      srcSliceY;

  1808.     int height= srcSliceH;

  1809.     int i, j;

  1810.     uint8_t *srcPtr= src[0];

  1811.     uint8_t *dstPtr= dst[0] + dstStride[0]*y;

  1812. 

  1813.     if (!isGray(c->dstFormat)){

  1814.         int height= -((-srcSliceH)>>c->chrDstVSubSample);

  1815.         memset(dst[1], 128, dstStride[1]*height);

  1816.         memset(dst[2], 128, dstStride[2]*height);

  1817.     }

  1818.     if (c->srcFormat == PIX_FMT_GRAY16LE) srcPtr++;

  1819.     for (i=0; i<height; i++)

  1820.     {

  1821.         for (j=0; j<length; j++) dstPtr[j] = srcPtr[j<<1];

  1822.         srcPtr+= srcStride[0];

  1823.         dstPtr+= dstStride[0];

  1824.     }

  1825.     return srcSliceH;

  1826. }

  1827. 

  1828. static int graytogray16(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1829.                         int srcSliceH, uint8_t* dst[], int dstStride[]){

  1830. 

  1831.     int length= c->srcW;

  1832.     int y=      srcSliceY;

  1833.     int height= srcSliceH;

  1834.     int i, j;

  1835.     uint8_t *srcPtr= src[0];

  1836.     uint8_t *dstPtr= dst[0] + dstStride[0]*y;

  1837.     for (i=0; i<height; i++)

  1838.     {

  1839.         for (j=0; j<length; j++)

  1840.         {

  1841.             dstPtr[j<<1] = srcPtr[j];

  1842.             dstPtr[(j<<1)+1] = srcPtr[j];

  1843.         }

  1844.         srcPtr+= srcStride[0];

  1845.         dstPtr+= dstStride[0];

  1846.     }

  1847.     return srcSliceH;

  1848. }

  1849. 

  1850. static int gray16swap(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1851.                       int srcSliceH, uint8_t* dst[], int dstStride[]){

  1852. 

  1853.     int length= c->srcW;

  1854.     int y=      srcSliceY;

  1855.     int height= srcSliceH;

  1856.     int i, j;

  1857.     uint16_t *srcPtr= src[0];

  1858.     uint16_t *dstPtr= dst[0] + dstStride[0]*y/2;

  1859.     for (i=0; i<height; i++)

  1860.     {

  1861.         for (j=0; j<length; j++) dstPtr[j] = bswap_16(srcPtr[j]);

  1862.         srcPtr+= srcStride[0]/2;

  1863.         dstPtr+= dstStride[0]/2;

  1864.     }

  1865.     return srcSliceH;

  1866. }

  1867. 

  1868. 

  1869. static void getSubSampleFactors(int *h, int *v, int format){

  1870.     switch(format){

  1871.     case PIX_FMT_UYVY422:

  1872.     case PIX_FMT_YUYV422:

  1873.         *h=1;

  1874.         *v=0;

  1875.         break;

  1876.     case PIX_FMT_YUV420P:

  1877.     case PIX_FMT_GRAY16BE:

  1878.     case PIX_FMT_GRAY16LE:

  1879.     case PIX_FMT_GRAY8: //FIXME remove after different subsamplings are fully implemented

  1880.     case PIX_FMT_NV12:

  1881.     case PIX_FMT_NV21:

  1882.         *h=1;

  1883.         *v=1;

  1884.         break;

  1885.     case PIX_FMT_YUV410P:

  1886.         *h=2;

  1887.         *v=2;

  1888.         break;

  1889.     case PIX_FMT_YUV444P:

  1890.         *h=0;

  1891.         *v=0;

  1892.         break;

  1893.     case PIX_FMT_YUV422P:

  1894.         *h=1;

  1895.         *v=0;

  1896.         break;

  1897.     case PIX_FMT_YUV411P:

  1898.         *h=2;

  1899.         *v=0;

  1900.         break;

  1901.     default:

  1902.         *h=0;

  1903.         *v=0;

  1904.         break;

  1905.     }

  1906. }

  1907. 

  1908. static uint16_t roundToInt16(int64_t f){

  1909.     int r= (f + (1<<15))>>16;

  1910.          if (r<-0x7FFF) return 0x8000;

  1911.     else if (r> 0x7FFF) return 0x7FFF;

  1912.     else                return r;

  1913. }

  1914. 

  1915. /**

  1916.  * @param inv_table the yuv2rgb coeffs, normally Inverse_Table_6_9[x]

  1917.  * @param fullRange if 1 then the luma range is 0..255 if 0 it is 16..235

  1918.  * @return -1 if not supported

  1919.  */

  1920. int sws_setColorspaceDetails(SwsContext *c, const int inv_table[4], int srcRange, const int table[4], int dstRange, int brightness, int contrast, int saturation){

  1921.     int64_t crv =  inv_table[0];

  1922.     int64_t cbu =  inv_table[1];

  1923.     int64_t cgu = -inv_table[2];

  1924.     int64_t cgv = -inv_table[3];

  1925.     int64_t cy  = 1<<16;

  1926.     int64_t oy  = 0;

  1927. 

  1928.     if (isYUV(c->dstFormat) || isGray(c->dstFormat)) return -1;

  1929.     memcpy(c->srcColorspaceTable, inv_table, sizeof(int)*4);

  1930.     memcpy(c->dstColorspaceTable,     table, sizeof(int)*4);

  1931. 

  1932.     c->brightness= brightness;

  1933.     c->contrast  = contrast;

  1934.     c->saturation= saturation;

  1935.     c->srcRange  = srcRange;

  1936.     c->dstRange  = dstRange;

  1937. 

  1938.     c->uOffset=   0x0400040004000400LL;

  1939.     c->vOffset=   0x0400040004000400LL;

  1940. 

  1941.     if (!srcRange){

  1942.         cy= (cy*255) / 219;

  1943.         oy= 16<<16;

  1944.     }else{

  1945.         crv= (crv*224) / 255;

  1946.         cbu= (cbu*224) / 255;

  1947.         cgu= (cgu*224) / 255;

  1948.         cgv= (cgv*224) / 255;

  1949.     }

  1950. 

  1951.     cy = (cy *contrast             )>>16;

  1952.     crv= (crv*contrast * saturation)>>32;

  1953.     cbu= (cbu*contrast * saturation)>>32;

  1954.     cgu= (cgu*contrast * saturation)>>32;

  1955.     cgv= (cgv*contrast * saturation)>>32;

  1956. 

  1957.     oy -= 256*brightness;

  1958. 

  1959.     c->yCoeff=    roundToInt16(cy *8192) * 0x0001000100010001ULL;

  1960.     c->vrCoeff=   roundToInt16(crv*8192) * 0x0001000100010001ULL;

  1961.     c->ubCoeff=   roundToInt16(cbu*8192) * 0x0001000100010001ULL;

  1962.     c->vgCoeff=   roundToInt16(cgv*8192) * 0x0001000100010001ULL;

  1963.     c->ugCoeff=   roundToInt16(cgu*8192) * 0x0001000100010001ULL;

  1964.     c->yOffset=   roundToInt16(oy *   8) * 0x0001000100010001ULL;

  1965. 

  1966.     yuv2rgb_c_init_tables(c, inv_table, srcRange, brightness, contrast, saturation);

  1967.     //FIXME factorize

  1968. 

  1969. #ifdef COMPILE_ALTIVEC

  1970.     if (c->flags & SWS_CPU_CAPS_ALTIVEC)

  1971.         yuv2rgb_altivec_init_tables (c, inv_table, brightness, contrast, saturation);

  1972. #endif

  1973.     return 0;

  1974. }

  1975. 

  1976. /**

  1977.  * @return -1 if not supported

  1978.  */

  1979. int sws_getColorspaceDetails(SwsContext *c, int **inv_table, int *srcRange, int **table, int *dstRange, int *brightness, int *contrast, int *saturation){

  1980.     if (isYUV(c->dstFormat) || isGray(c->dstFormat)) return -1;

  1981. 

  1982.     *inv_table = c->srcColorspaceTable;

  1983.     *table     = c->dstColorspaceTable;

  1984.     *srcRange  = c->srcRange;

  1985.     *dstRange  = c->dstRange;

  1986.     *brightness= c->brightness;

  1987.     *contrast  = c->contrast;

  1988.     *saturation= c->saturation;

  1989. 

  1990.     return 0;

  1991. }

  1992. 

  1993. static int handle_jpeg(int *format)

  1994. {

  1995.     switch (*format) {

  1996.         case PIX_FMT_YUVJ420P:

  1997.             *format = PIX_FMT_YUV420P;

  1998.             return 1;

  1999.         case PIX_FMT_YUVJ422P:

  2000.             *format = PIX_FMT_YUV422P;

  2001.             return 1;

  2002.         case PIX_FMT_YUVJ444P:

  2003.             *format = PIX_FMT_YUV444P;

  2004.             return 1;

  2005.         default:

  2006.             return 0;

  2007.     }

  2008. }

  2009. 

  2010. SwsContext *sws_getContext(int srcW, int srcH, int srcFormat, int dstW, int dstH, int dstFormat, int flags,

  2011.                            SwsFilter *srcFilter, SwsFilter *dstFilter, double *param){

  2012. 

  2013.     SwsContext *c;

  2014.     int i;

  2015.     int usesVFilter, usesHFilter;

  2016.     int unscaled, needsDither;

  2017.     int srcRange, dstRange;

  2018.     SwsFilter dummyFilter= {NULL, NULL, NULL, NULL};

  2019. #if defined(ARCH_X86)

  2020.     if (flags & SWS_CPU_CAPS_MMX)

  2021.         asm volatile("emms\n\t"::: "memory");

  2022. #endif

  2023. 

  2024. #if !defined(RUNTIME_CPUDETECT) || !defined (CONFIG_GPL) //ensure that the flags match the compiled variant if cpudetect is off

  2025.     flags &= ~(SWS_CPU_CAPS_MMX|SWS_CPU_CAPS_MMX2|SWS_CPU_CAPS_3DNOW|SWS_CPU_CAPS_ALTIVEC|SWS_CPU_CAPS_BFIN);

  2026. #ifdef HAVE_MMX2

  2027.     flags |= SWS_CPU_CAPS_MMX|SWS_CPU_CAPS_MMX2;

  2028. #elif defined (HAVE_3DNOW)

  2029.     flags |= SWS_CPU_CAPS_MMX|SWS_CPU_CAPS_3DNOW;

  2030. #elif defined (HAVE_MMX)

  2031.     flags |= SWS_CPU_CAPS_MMX;

  2032. #elif defined (HAVE_ALTIVEC)

  2033.     flags |= SWS_CPU_CAPS_ALTIVEC;

  2034. #elif defined (ARCH_BFIN)

  2035.     flags |= SWS_CPU_CAPS_BFIN;

  2036. #endif

  2037. #endif /* RUNTIME_CPUDETECT */

  2038.     if (clip_table[512] != 255) globalInit();

  2039.     if (rgb15to16 == NULL) sws_rgb2rgb_init(flags);

  2040. 

  2041.     unscaled = (srcW == dstW && srcH == dstH);

  2042.     needsDither= (isBGR(dstFormat) || isRGB(dstFormat))

  2043.         && (fmt_depth(dstFormat))<24

  2044.         && ((fmt_depth(dstFormat))<(fmt_depth(srcFormat)) || (!(isRGB(srcFormat) || isBGR(srcFormat))));

  2045. 

  2046.     srcRange = handle_jpeg(&srcFormat);

  2047.     dstRange = handle_jpeg(&dstFormat);

  2048. 

  2049.     if (!isSupportedIn(srcFormat))

  2050.     {

  2051.         av_log(NULL, AV_LOG_ERROR, "swScaler: %s is not supported as input format\n", sws_format_name(srcFormat));

  2052.         return NULL;

  2053.     }

  2054.     if (!isSupportedOut(dstFormat))

  2055.     {

  2056.         av_log(NULL, AV_LOG_ERROR, "swScaler: %s is not supported as output format\n", sws_format_name(dstFormat));

  2057.         return NULL;

  2058.     }

  2059. 

  2060.     /* sanity check */

  2061.     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

  2062.     {

  2063.         av_log(NULL, AV_LOG_ERROR, "swScaler: %dx%d -> %dx%d is invalid scaling dimension\n",

  2064.                srcW, srcH, dstW, dstH);

  2065.         return NULL;

  2066.     }

  2067. 

  2068.     if (!dstFilter) dstFilter= &dummyFilter;

  2069.     if (!srcFilter) srcFilter= &dummyFilter;

  2070. 

  2071.     c= av_mallocz(sizeof(SwsContext));

  2072. 

  2073.     c->av_class = &sws_context_class;

  2074.     c->srcW= srcW;

  2075.     c->srcH= srcH;

  2076.     c->dstW= dstW;

  2077.     c->dstH= dstH;

  2078.     c->lumXInc= ((srcW<<16) + (dstW>>1))/dstW;

  2079.     c->lumYInc= ((srcH<<16) + (dstH>>1))/dstH;

  2080.     c->flags= flags;

  2081.     c->dstFormat= dstFormat;

  2082.     c->srcFormat= srcFormat;

  2083.     c->vRounder= 4* 0x0001000100010001ULL;

  2084. 

  2085.     usesHFilter= usesVFilter= 0;

  2086.     if (dstFilter->lumV!=NULL && dstFilter->lumV->length>1) usesVFilter=1;

  2087.     if (dstFilter->lumH!=NULL && dstFilter->lumH->length>1) usesHFilter=1;

  2088.     if (dstFilter->chrV!=NULL && dstFilter->chrV->length>1) usesVFilter=1;

  2089.     if (dstFilter->chrH!=NULL && dstFilter->chrH->length>1) usesHFilter=1;

  2090.     if (srcFilter->lumV!=NULL && srcFilter->lumV->length>1) usesVFilter=1;

  2091.     if (srcFilter->lumH!=NULL && srcFilter->lumH->length>1) usesHFilter=1;

  2092.     if (srcFilter->chrV!=NULL && srcFilter->chrV->length>1) usesVFilter=1;

  2093.     if (srcFilter->chrH!=NULL && srcFilter->chrH->length>1) usesHFilter=1;

  2094. 

  2095.     getSubSampleFactors(&c->chrSrcHSubSample, &c->chrSrcVSubSample, srcFormat);

  2096.     getSubSampleFactors(&c->chrDstHSubSample, &c->chrDstVSubSample, dstFormat);

  2097. 

  2098.     // reuse chroma for 2 pixles rgb/bgr unless user wants full chroma interpolation

  2099.     if ((isBGR(dstFormat) || isRGB(dstFormat)) && !(flags&SWS_FULL_CHR_H_INT)) c->chrDstHSubSample=1;

  2100. 

  2101.     // drop some chroma lines if the user wants it

  2102.     c->vChrDrop= (flags&SWS_SRC_V_CHR_DROP_MASK)>>SWS_SRC_V_CHR_DROP_SHIFT;

  2103.     c->chrSrcVSubSample+= c->vChrDrop;

  2104. 

  2105.     // drop every 2. pixel for chroma calculation unless user wants full chroma

  2106.     if ((isBGR(srcFormat) || isRGB(srcFormat)) && !(flags&SWS_FULL_CHR_H_INP)

  2107.       && srcFormat!=PIX_FMT_RGB8      && srcFormat!=PIX_FMT_BGR8

  2108.       && srcFormat!=PIX_FMT_RGB4      && srcFormat!=PIX_FMT_BGR4

  2109.       && srcFormat!=PIX_FMT_RGB4_BYTE && srcFormat!=PIX_FMT_BGR4_BYTE)

  2110.         c->chrSrcHSubSample=1;

  2111. 

  2112.     if (param){

  2113.         c->param[0] = param[0];

  2114.         c->param[1] = param[1];

  2115.     }else{

  2116.         c->param[0] =

  2117.         c->param[1] = SWS_PARAM_DEFAULT;

  2118.     }

  2119. 

  2120.     c->chrIntHSubSample= c->chrDstHSubSample;

  2121.     c->chrIntVSubSample= c->chrSrcVSubSample;

  2122. 

  2123.     // Note the -((-x)>>y) is so that we always round toward +inf.

  2124.     c->chrSrcW= -((-srcW) >> c->chrSrcHSubSample);

  2125.     c->chrSrcH= -((-srcH) >> c->chrSrcVSubSample);

  2126.     c->chrDstW= -((-dstW) >> c->chrDstHSubSample);

  2127.     c->chrDstH= -((-dstH) >> c->chrDstVSubSample);

  2128. 

  2129.     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);

  2130. 

  2131.     /* unscaled special Cases */

  2132.     if (unscaled && !usesHFilter && !usesVFilter)

  2133.     {

  2134.         /* yv12_to_nv12 */

  2135.         if (srcFormat == PIX_FMT_YUV420P && (dstFormat == PIX_FMT_NV12 || dstFormat == PIX_FMT_NV21))

  2136.         {

  2137.             c->swScale= PlanarToNV12Wrapper;

  2138.         }

  2139. #ifdef CONFIG_GPL

  2140.         /* yuv2bgr */

  2141.         if ((srcFormat==PIX_FMT_YUV420P || srcFormat==PIX_FMT_YUV422P) && (isBGR(dstFormat) || isRGB(dstFormat)))

  2142.         {

  2143.             c->swScale= yuv2rgb_get_func_ptr(c);

  2144.         }

  2145. #endif

  2146. 

  2147.         if ( srcFormat==PIX_FMT_YUV410P && dstFormat==PIX_FMT_YUV420P )

  2148.         {

  2149.             c->swScale= yvu9toyv12Wrapper;

  2150.         }

  2151. 

  2152.         /* bgr24toYV12 */

  2153.         if (srcFormat==PIX_FMT_BGR24 && dstFormat==PIX_FMT_YUV420P)

  2154.             c->swScale= bgr24toyv12Wrapper;

  2155. 

  2156.         /* rgb/bgr -> rgb/bgr (no dither needed forms) */

  2157.         if (  (isBGR(srcFormat) || isRGB(srcFormat))

  2158.            && (isBGR(dstFormat) || isRGB(dstFormat))

  2159.            && srcFormat != PIX_FMT_BGR8      && dstFormat != PIX_FMT_BGR8

  2160.            && srcFormat != PIX_FMT_RGB8      && dstFormat != PIX_FMT_RGB8

  2161.            && srcFormat != PIX_FMT_BGR4      && dstFormat != PIX_FMT_BGR4

  2162.            && srcFormat != PIX_FMT_RGB4      && dstFormat != PIX_FMT_RGB4

  2163.            && srcFormat != PIX_FMT_BGR4_BYTE && dstFormat != PIX_FMT_BGR4_BYTE

  2164.            && srcFormat != PIX_FMT_RGB4_BYTE && dstFormat != PIX_FMT_RGB4_BYTE

  2165.            && srcFormat != PIX_FMT_MONOBLACK && dstFormat != PIX_FMT_MONOBLACK

  2166.            && !needsDither)

  2167.              c->swScale= rgb2rgbWrapper;

  2168. 

  2169.         /* LQ converters if -sws 0 or -sws 4*/

  2170.         if (c->flags&(SWS_FAST_BILINEAR|SWS_POINT)){

  2171.             /* rgb/bgr -> rgb/bgr (dither needed forms) */

  2172.             if ( (isBGR(srcFormat) || isRGB(srcFormat))

  2173.               && (isBGR(dstFormat) || isRGB(dstFormat))

  2174.               && needsDither)

  2175.                 c->swScale= rgb2rgbWrapper;

  2176. 

  2177.             /* yv12_to_yuy2 */

  2178.             if (srcFormat == PIX_FMT_YUV420P &&

  2179.                 (dstFormat == PIX_FMT_YUYV422 || dstFormat == PIX_FMT_UYVY422))

  2180.             {

  2181.                 if (dstFormat == PIX_FMT_YUYV422)

  2182.                     c->swScale= PlanarToYuy2Wrapper;

  2183.                 else

  2184.                     c->swScale= PlanarToUyvyWrapper;

  2185.             }

  2186.         }

  2187. 

  2188. #ifdef COMPILE_ALTIVEC

  2189.         if ((c->flags & SWS_CPU_CAPS_ALTIVEC) &&

  2190.             ((srcFormat == PIX_FMT_YUV420P &&

  2191.              (dstFormat == PIX_FMT_YUYV422 || dstFormat == PIX_FMT_UYVY422)))) {

  2192.           // unscaled YV12 -> packed YUV, we want speed

  2193.           if (dstFormat == PIX_FMT_YUYV422)

  2194.               c->swScale= yv12toyuy2_unscaled_altivec;

  2195.           else

  2196.               c->swScale= yv12touyvy_unscaled_altivec;

  2197.         }

  2198. #endif

  2199. 

  2200.         /* simple copy */

  2201.         if (  srcFormat == dstFormat

  2202.             || (isPlanarYUV(srcFormat) && isGray(dstFormat))

  2203.             || (isPlanarYUV(dstFormat) && isGray(srcFormat)) )

  2204.         {

  2205.             c->swScale= simpleCopy;

  2206.         }

  2207. 

  2208.         /* gray16{le,be} conversions */

  2209.         if (isGray16(srcFormat) && (isPlanarYUV(dstFormat) || (dstFormat == PIX_FMT_GRAY8)))

  2210.         {

  2211.             c->swScale= gray16togray;

  2212.         }

  2213.         if ((isPlanarYUV(srcFormat) || (srcFormat == PIX_FMT_GRAY8)) && isGray16(dstFormat))

  2214.         {

  2215.             c->swScale= graytogray16;

  2216.         }

  2217.         if (srcFormat != dstFormat && isGray16(srcFormat) && isGray16(dstFormat))

  2218.         {

  2219.             c->swScale= gray16swap;

  2220.         }

  2221. 

  2222. #ifdef ARCH_BFIN

  2223.         if (flags & SWS_CPU_CAPS_BFIN)

  2224.             ff_bfin_get_unscaled_swscale (c);

  2225. #endif

  2226. 

  2227.         if (c->swScale){

  2228.             if (flags&SWS_PRINT_INFO)

  2229.                 av_log(c, AV_LOG_INFO, "SwScaler: using unscaled %s -> %s special converter\n",

  2230.                                 sws_format_name(srcFormat), sws_format_name(dstFormat));

  2231.             return c;

  2232.         }

  2233.     }

  2234. 

  2235.     if (flags & SWS_CPU_CAPS_MMX2)

  2236.     {

  2237.         c->canMMX2BeUsed= (dstW >=srcW && (dstW&31)==0 && (srcW&15)==0) ? 1 : 0;

  2238.         if (!c->canMMX2BeUsed && dstW >=srcW && (srcW&15)==0 && (flags&SWS_FAST_BILINEAR))

  2239.         {

  2240.             if (flags&SWS_PRINT_INFO)

  2241.                 av_log(c, AV_LOG_INFO, "SwScaler: output Width is not a multiple of 32 -> no MMX2 scaler\n");

  2242.         }

  2243.         if (usesHFilter) c->canMMX2BeUsed=0;

  2244.     }

  2245.     else

  2246.         c->canMMX2BeUsed=0;

  2247. 

  2248.     c->chrXInc= ((c->chrSrcW<<16) + (c->chrDstW>>1))/c->chrDstW;

  2249.     c->chrYInc= ((c->chrSrcH<<16) + (c->chrDstH>>1))/c->chrDstH;

  2250. 

  2251.     // match pixel 0 of the src to pixel 0 of dst and match pixel n-2 of src to pixel n-2 of dst

  2252.     // but only for the FAST_BILINEAR mode otherwise do correct scaling

  2253.     // n-2 is the last chrominance sample available

  2254.     // this is not perfect, but no one should notice the difference, the more correct variant

  2255.     // would be like the vertical one, but that would require some special code for the

  2256.     // first and last pixel

  2257.     if (flags&SWS_FAST_BILINEAR)

  2258.     {

  2259.         if (c->canMMX2BeUsed)

  2260.         {

  2261.             c->lumXInc+= 20;

  2262.             c->chrXInc+= 20;

  2263.         }

  2264.         //we don't use the x86asm scaler if mmx is available

  2265.         else if (flags & SWS_CPU_CAPS_MMX)

  2266.         {

  2267.             c->lumXInc = ((srcW-2)<<16)/(dstW-2) - 20;

  2268.             c->chrXInc = ((c->chrSrcW-2)<<16)/(c->chrDstW-2) - 20;

  2269.         }

  2270.     }

  2271. 

  2272.     /* precalculate horizontal scaler filter coefficients */

  2273.     {

  2274.         const int filterAlign=

  2275.             (flags & SWS_CPU_CAPS_MMX) ? 4 :

  2276.             (flags & SWS_CPU_CAPS_ALTIVEC) ? 8 :

  2277.             1;

  2278. 

  2279.         initFilter(&c->hLumFilter, &c->hLumFilterPos, &c->hLumFilterSize, c->lumXInc,

  2280.                    srcW      ,       dstW, filterAlign, 1<<14,

  2281.                    (flags&SWS_BICUBLIN) ? (flags|SWS_BICUBIC)  : flags,

  2282.                    srcFilter->lumH, dstFilter->lumH, c->param);

  2283.         initFilter(&c->hChrFilter, &c->hChrFilterPos, &c->hChrFilterSize, c->chrXInc,

  2284.                    c->chrSrcW, c->chrDstW, filterAlign, 1<<14,

  2285.                    (flags&SWS_BICUBLIN) ? (flags|SWS_BILINEAR) : flags,

  2286.                    srcFilter->chrH, dstFilter->chrH, c->param);

  2287. 

  2288. #define MAX_FUNNY_CODE_SIZE 10000

  2289. #if defined(COMPILE_MMX2)

  2290. // can't downscale !!!

  2291.         if (c->canMMX2BeUsed && (flags & SWS_FAST_BILINEAR))

  2292.         {

  2293. #ifdef MAP_ANONYMOUS

  2294.             c->funnyYCode = (uint8_t*)mmap(NULL, MAX_FUNNY_CODE_SIZE, PROT_EXEC | PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, 0, 0);

  2295.             c->funnyUVCode = (uint8_t*)mmap(NULL, MAX_FUNNY_CODE_SIZE, PROT_EXEC | PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, 0, 0);

  2296. #else

  2297.             c->funnyYCode = av_malloc(MAX_FUNNY_CODE_SIZE);

  2298.             c->funnyUVCode = av_malloc(MAX_FUNNY_CODE_SIZE);

  2299. #endif

  2300. 

  2301.             c->lumMmx2Filter   = av_malloc((dstW        /8+8)*sizeof(int16_t));

  2302.             c->chrMmx2Filter   = av_malloc((c->chrDstW  /4+8)*sizeof(int16_t));

  2303.             c->lumMmx2FilterPos= av_malloc((dstW      /2/8+8)*sizeof(int32_t));

  2304.             c->chrMmx2FilterPos= av_malloc((c->chrDstW/2/4+8)*sizeof(int32_t));

  2305. 

  2306.             initMMX2HScaler(      dstW, c->lumXInc, c->funnyYCode , c->lumMmx2Filter, c->lumMmx2FilterPos, 8);

  2307.             initMMX2HScaler(c->chrDstW, c->chrXInc, c->funnyUVCode, c->chrMmx2Filter, c->chrMmx2FilterPos, 4);

  2308.         }

  2309. #endif /* defined(COMPILE_MMX2) */

  2310.     } // Init Horizontal stuff

  2311. 

  2312. 

  2313. 

  2314.     /* precalculate vertical scaler filter coefficients */

  2315.     {

  2316.         const int filterAlign=

  2317.             (flags & SWS_CPU_CAPS_MMX) && (flags & SWS_ACCURATE_RND) ? 2 :

  2318.             (flags & SWS_CPU_CAPS_ALTIVEC) ? 8 :

  2319.             1;

  2320. 

  2321.         initFilter(&c->vLumFilter, &c->vLumFilterPos, &c->vLumFilterSize, c->lumYInc,

  2322.                    srcH      ,        dstH, filterAlign, (1<<12)-4,

  2323.                    (flags&SWS_BICUBLIN) ? (flags|SWS_BICUBIC)  : flags,

  2324.                    srcFilter->lumV, dstFilter->lumV, c->param);

  2325.         initFilter(&c->vChrFilter, &c->vChrFilterPos, &c->vChrFilterSize, c->chrYInc,

  2326.                    c->chrSrcH, c->chrDstH, filterAlign, (1<<12)-4,

  2327.                    (flags&SWS_BICUBLIN) ? (flags|SWS_BILINEAR) : flags,

  2328.                    srcFilter->chrV, dstFilter->chrV, c->param);

  2329. 

  2330. #ifdef HAVE_ALTIVEC

  2331.         c->vYCoeffsBank = av_malloc(sizeof (vector signed short)*c->vLumFilterSize*c->dstH);

  2332.         c->vCCoeffsBank = av_malloc(sizeof (vector signed short)*c->vChrFilterSize*c->chrDstH);

  2333. 

  2334.         for (i=0;i<c->vLumFilterSize*c->dstH;i++) {

  2335.             int j;

  2336.             short *p = (short *)&c->vYCoeffsBank[i];

  2337.             for (j=0;j<8;j++)

  2338.                 p[j] = c->vLumFilter[i];

  2339.         }

  2340. 

  2341.         for (i=0;i<c->vChrFilterSize*c->chrDstH;i++) {

  2342.             int j;

  2343.             short *p = (short *)&c->vCCoeffsBank[i];

  2344.             for (j=0;j<8;j++)

  2345.                 p[j] = c->vChrFilter[i];

  2346.         }

  2347. #endif

  2348.     }

  2349. 

  2350.     // Calculate Buffer Sizes so that they won't run out while handling these damn slices

  2351.     c->vLumBufSize= c->vLumFilterSize;

  2352.     c->vChrBufSize= c->vChrFilterSize;

  2353.     for (i=0; i<dstH; i++)

  2354.     {

  2355.         int chrI= i*c->chrDstH / dstH;

  2356.         int nextSlice= FFMAX(c->vLumFilterPos[i   ] + c->vLumFilterSize - 1,

  2357.                            ((c->vChrFilterPos[chrI] + c->vChrFilterSize - 1)<<c->chrSrcVSubSample));

  2358. 

  2359.         nextSlice>>= c->chrSrcVSubSample;

  2360.         nextSlice<<= c->chrSrcVSubSample;

  2361.         if (c->vLumFilterPos[i   ] + c->vLumBufSize < nextSlice)

  2362.             c->vLumBufSize= nextSlice - c->vLumFilterPos[i   ];

  2363.         if (c->vChrFilterPos[chrI] + c->vChrBufSize < (nextSlice>>c->chrSrcVSubSample))

  2364.             c->vChrBufSize= (nextSlice>>c->chrSrcVSubSample) - c->vChrFilterPos[chrI];

  2365.     }

  2366. 

  2367.     // allocate pixbufs (we use dynamic allocation because otherwise we would need to

  2368.     c->lumPixBuf= av_malloc(c->vLumBufSize*2*sizeof(int16_t*));

  2369.     c->chrPixBuf= av_malloc(c->vChrBufSize*2*sizeof(int16_t*));

  2370.     //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)

  2371.     /* align at 16 bytes for AltiVec */

  2372.     for (i=0; i<c->vLumBufSize; i++)

  2373.         c->lumPixBuf[i]= c->lumPixBuf[i+c->vLumBufSize]= av_mallocz(4000);

  2374.     for (i=0; i<c->vChrBufSize; i++)

  2375.         c->chrPixBuf[i]= c->chrPixBuf[i+c->vChrBufSize]= av_malloc(8000);

  2376. 

  2377.     //try to avoid drawing green stuff between the right end and the stride end

  2378.     for (i=0; i<c->vChrBufSize; i++) memset(c->chrPixBuf[i], 64, 8000);

  2379. 

  2380.     ASSERT(c->chrDstH <= dstH)

  2381. 

  2382.     if (flags&SWS_PRINT_INFO)

  2383.     {

  2384. #ifdef DITHER1XBPP

  2385.         char *dither= " dithered";

  2386. #else

  2387.         char *dither= "";

  2388. #endif

  2389.         if (flags&SWS_FAST_BILINEAR)

  2390.             av_log(c, AV_LOG_INFO, "SwScaler: FAST_BILINEAR scaler, ");

  2391.         else if (flags&SWS_BILINEAR)

  2392.             av_log(c, AV_LOG_INFO, "SwScaler: BILINEAR scaler, ");

  2393.         else if (flags&SWS_BICUBIC)

  2394.             av_log(c, AV_LOG_INFO, "SwScaler: BICUBIC scaler, ");

  2395.         else if (flags&SWS_X)

  2396.             av_log(c, AV_LOG_INFO, "SwScaler: Experimental scaler, ");

  2397.         else if (flags&SWS_POINT)

  2398.             av_log(c, AV_LOG_INFO, "SwScaler: Nearest Neighbor / POINT scaler, ");

  2399.         else if (flags&SWS_AREA)

  2400.             av_log(c, AV_LOG_INFO, "SwScaler: Area Averageing scaler, ");

  2401.         else if (flags&SWS_BICUBLIN)

  2402.             av_log(c, AV_LOG_INFO, "SwScaler: luma BICUBIC / chroma BILINEAR scaler, ");

  2403.         else if (flags&SWS_GAUSS)

  2404.             av_log(c, AV_LOG_INFO, "SwScaler: Gaussian scaler, ");

  2405.         else if (flags&SWS_SINC)

  2406.             av_log(c, AV_LOG_INFO, "SwScaler: Sinc scaler, ");

  2407.         else if (flags&SWS_LANCZOS)

  2408.             av_log(c, AV_LOG_INFO, "SwScaler: Lanczos scaler, ");

  2409.         else if (flags&SWS_SPLINE)

  2410.             av_log(c, AV_LOG_INFO, "SwScaler: Bicubic spline scaler, ");

  2411.         else

  2412.             av_log(c, AV_LOG_INFO, "SwScaler: ehh flags invalid?! ");

  2413. 

  2414.         if (dstFormat==PIX_FMT_BGR555 || dstFormat==PIX_FMT_BGR565)

  2415.             av_log(c, AV_LOG_INFO, "from %s to%s %s ",

  2416.                    sws_format_name(srcFormat), dither, sws_format_name(dstFormat));

  2417.         else

  2418.             av_log(c, AV_LOG_INFO, "from %s to %s ",

  2419.                    sws_format_name(srcFormat), sws_format_name(dstFormat));

  2420. 

  2421.         if (flags & SWS_CPU_CAPS_MMX2)

  2422.             av_log(c, AV_LOG_INFO, "using MMX2\n");

  2423.         else if (flags & SWS_CPU_CAPS_3DNOW)

  2424.             av_log(c, AV_LOG_INFO, "using 3DNOW\n");

  2425.         else if (flags & SWS_CPU_CAPS_MMX)

  2426.             av_log(c, AV_LOG_INFO, "using MMX\n");

  2427.         else if (flags & SWS_CPU_CAPS_ALTIVEC)

  2428.             av_log(c, AV_LOG_INFO, "using AltiVec\n");

  2429.         else

  2430.             av_log(c, AV_LOG_INFO, "using C\n");

  2431.     }

  2432. 

  2433.     if (flags & SWS_PRINT_INFO)

  2434.     {

  2435.         if (flags & SWS_CPU_CAPS_MMX)

  2436.         {

  2437.             if (c->canMMX2BeUsed && (flags&SWS_FAST_BILINEAR))

  2438.                 av_log(c, AV_LOG_VERBOSE, "SwScaler: using FAST_BILINEAR MMX2 scaler for horizontal scaling\n");

  2439.             else

  2440.             {

  2441.                 if (c->hLumFilterSize==4)

  2442.                     av_log(c, AV_LOG_VERBOSE, "SwScaler: using 4-tap MMX scaler for horizontal luminance scaling\n");

  2443.                 else if (c->hLumFilterSize==8)

  2444.                     av_log(c, AV_LOG_VERBOSE, "SwScaler: using 8-tap MMX scaler for horizontal luminance scaling\n");

  2445.                 else

  2446.                     av_log(c, AV_LOG_VERBOSE, "SwScaler: using n-tap MMX scaler for horizontal luminance scaling\n");

  2447. 

  2448.                 if (c->hChrFilterSize==4)

  2449.                     av_log(c, AV_LOG_VERBOSE, "SwScaler: using 4-tap MMX scaler for horizontal chrominance scaling\n");

  2450.                 else if (c->hChrFilterSize==8)

  2451.                     av_log(c, AV_LOG_VERBOSE, "SwScaler: using 8-tap MMX scaler for horizontal chrominance scaling\n");

  2452.                 else

  2453.                     av_log(c, AV_LOG_VERBOSE, "SwScaler: using n-tap MMX scaler for horizontal chrominance scaling\n");

  2454.             }

  2455.         }

  2456.         else

  2457.         {

  2458. #if defined(ARCH_X86)

  2459.             av_log(c, AV_LOG_VERBOSE, "SwScaler: using X86-Asm scaler for horizontal scaling\n");

  2460. #else

  2461.             if (flags & SWS_FAST_BILINEAR)

  2462.                 av_log(c, AV_LOG_VERBOSE, "SwScaler: using FAST_BILINEAR C scaler for horizontal scaling\n");

  2463.             else

  2464.                 av_log(c, AV_LOG_VERBOSE, "SwScaler: using C scaler for horizontal scaling\n");

  2465. #endif

  2466.         }

  2467.         if (isPlanarYUV(dstFormat))

  2468.         {

  2469.             if (c->vLumFilterSize==1)

  2470.                 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");

  2471.             else

  2472.                 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");

  2473.         }

  2474.         else

  2475.         {

  2476.             if (c->vLumFilterSize==1 && c->vChrFilterSize==2)

  2477.                 av_log(c, AV_LOG_VERBOSE, "SwScaler: using 1-tap %s \"scaler\" for vertical luminance scaling (BGR)\n"

  2478.                        "SwScaler:       2-tap scaler for vertical chrominance scaling (BGR)\n",(flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");

  2479.             else if (c->vLumFilterSize==2 && c->vChrFilterSize==2)

  2480.                 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");

  2481.             else

  2482.                 av_log(c, AV_LOG_VERBOSE, "SwScaler: using n-tap %s scaler for vertical scaling (BGR)\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");

  2483.         }

  2484. 

  2485.         if (dstFormat==PIX_FMT_BGR24)

  2486.             av_log(c, AV_LOG_VERBOSE, "SwScaler: using %s YV12->BGR24 Converter\n",

  2487.                    (flags & SWS_CPU_CAPS_MMX2) ? "MMX2" : ((flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C"));

  2488.         else if (dstFormat==PIX_FMT_RGB32)

  2489.             av_log(c, AV_LOG_VERBOSE, "SwScaler: using %s YV12->BGR32 Converter\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");

  2490.         else if (dstFormat==PIX_FMT_BGR565)

  2491.             av_log(c, AV_LOG_VERBOSE, "SwScaler: using %s YV12->BGR16 Converter\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");

  2492.         else if (dstFormat==PIX_FMT_BGR555)

  2493.             av_log(c, AV_LOG_VERBOSE, "SwScaler: using %s YV12->BGR15 Converter\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");

  2494. 

  2495.         av_log(c, AV_LOG_VERBOSE, "SwScaler: %dx%d -> %dx%d\n", srcW, srcH, dstW, dstH);

  2496.     }

  2497.     if (flags & SWS_PRINT_INFO)

  2498.     {

  2499.         av_log(c, AV_LOG_DEBUG, "SwScaler:Lum srcW=%d srcH=%d dstW=%d dstH=%d xInc=%d yInc=%d\n",

  2500.                c->srcW, c->srcH, c->dstW, c->dstH, c->lumXInc, c->lumYInc);

  2501.         av_log(c, AV_LOG_DEBUG, "SwScaler:Chr srcW=%d srcH=%d dstW=%d dstH=%d xInc=%d yInc=%d\n",

  2502.                c->chrSrcW, c->chrSrcH, c->chrDstW, c->chrDstH, c->chrXInc, c->chrYInc);

  2503.     }

  2504. 

  2505.     c->swScale= getSwsFunc(flags);

  2506.     return c;

  2507. }

  2508. 

  2509. /**

  2510.  * swscale warper, so we don't need to export the SwsContext.

  2511.  * assumes planar YUV to be in YUV order instead of YVU

  2512.  */

  2513. int sws_scale(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  2514.               int srcSliceH, uint8_t* dst[], int dstStride[]){

  2515.     int i;

  2516.     uint8_t* src2[4]= {src[0], src[1], src[2]};

  2517.     uint32_t pal[256];

  2518.     if (c->sliceDir == 0 && srcSliceY != 0 && srcSliceY + srcSliceH != c->srcH) {

  2519.         av_log(c, AV_LOG_ERROR, "swScaler: slices start in the middle!\n");

  2520.         return 0;

  2521.     }

  2522.     if (c->sliceDir == 0) {

  2523.         if (srcSliceY == 0) c->sliceDir = 1; else c->sliceDir = -1;

  2524.     }

  2525. 

  2526.     if (c->srcFormat == PIX_FMT_PAL8){

  2527.         for (i=0; i<256; i++){

  2528.             int p= ((uint32_t*)(src[1]))[i];

  2529.             int r= (p>>16)&0xFF;

  2530.             int g= (p>> 8)&0xFF;

  2531.             int b=  p     &0xFF;

  2532.             int y= av_clip_uint8(((RY*r + GY*g + BY*b)>>RGB2YUV_SHIFT) + 16 );

  2533.             int u= av_clip_uint8(((RU*r + GU*g + BU*b)>>RGB2YUV_SHIFT) + 128);

  2534.             int v= av_clip_uint8(((RV*r + GV*g + BV*b)>>RGB2YUV_SHIFT) + 128);

  2535.             pal[i]= y + (u<<8) + (v<<16);

  2536.         }

  2537.         src2[1]= pal;

  2538.     }

  2539. 

  2540.     // copy strides, so they can safely be modified

  2541.     if (c->sliceDir == 1) {

  2542.         // slices go from top to bottom

  2543.         int srcStride2[4]= {srcStride[0], srcStride[1], srcStride[2]};

  2544.         int dstStride2[4]= {dstStride[0], dstStride[1], dstStride[2]};

  2545.         return c->swScale(c, src2, srcStride2, srcSliceY, srcSliceH, dst, dstStride2);

  2546.     } else {

  2547.         // slices go from bottom to top => we flip the image internally

  2548.         uint8_t* dst2[4]= {dst[0] + (c->dstH-1)*dstStride[0],

  2549.                            dst[1] + ((c->dstH>>c->chrDstVSubSample)-1)*dstStride[1],

  2550.                            dst[2] + ((c->dstH>>c->chrDstVSubSample)-1)*dstStride[2]};

  2551.         int srcStride2[4]= {-srcStride[0], -srcStride[1], -srcStride[2]};

  2552.         int dstStride2[4]= {-dstStride[0], -dstStride[1], -dstStride[2]};

  2553. 

  2554.         src2[0] += (srcSliceH-1)*srcStride[0];

  2555.         if (c->srcFormat != PIX_FMT_PAL8)

  2556.             src2[1] += ((srcSliceH>>c->chrSrcVSubSample)-1)*srcStride[1];

  2557.         src2[2] += ((srcSliceH>>c->chrSrcVSubSample)-1)*srcStride[2];

  2558. 

  2559.         return c->swScale(c, src2, srcStride2, c->srcH-srcSliceY-srcSliceH, srcSliceH, dst2, dstStride2);

  2560.     }

  2561. }

  2562. 

  2563. /**

  2564.  * swscale warper, so we don't need to export the SwsContext

  2565.  */

  2566. int sws_scale_ordered(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  2567.                       int srcSliceH, uint8_t* dst[], int dstStride[]){

  2568.     return sws_scale(c, src, srcStride, srcSliceY, srcSliceH, dst, dstStride);

  2569. }

  2570. 

  2571. SwsFilter *sws_getDefaultFilter(float lumaGBlur, float chromaGBlur,

  2572.                                 float lumaSharpen, float chromaSharpen,

  2573.                                 float chromaHShift, float chromaVShift,

  2574.                                 int verbose)

  2575. {

  2576.     SwsFilter *filter= av_malloc(sizeof(SwsFilter));

  2577. 

  2578.     if (lumaGBlur!=0.0){

  2579.         filter->lumH= sws_getGaussianVec(lumaGBlur, 3.0);

  2580.         filter->lumV= sws_getGaussianVec(lumaGBlur, 3.0);

  2581.     }else{

  2582.         filter->lumH= sws_getIdentityVec();

  2583.         filter->lumV= sws_getIdentityVec();

  2584.     }

  2585. 

  2586.     if (chromaGBlur!=0.0){

  2587.         filter->chrH= sws_getGaussianVec(chromaGBlur, 3.0);

  2588.         filter->chrV= sws_getGaussianVec(chromaGBlur, 3.0);

  2589.     }else{

  2590.         filter->chrH= sws_getIdentityVec();

  2591.         filter->chrV= sws_getIdentityVec();

  2592.     }

  2593. 

  2594.     if (chromaSharpen!=0.0){

  2595.         SwsVector *id= sws_getIdentityVec();

  2596.         sws_scaleVec(filter->chrH, -chromaSharpen);

  2597.         sws_scaleVec(filter->chrV, -chromaSharpen);

  2598.         sws_addVec(filter->chrH, id);

  2599.         sws_addVec(filter->chrV, id);

  2600.         sws_freeVec(id);

  2601.     }

  2602. 

  2603.     if (lumaSharpen!=0.0){

  2604.         SwsVector *id= sws_getIdentityVec();

  2605.         sws_scaleVec(filter->lumH, -lumaSharpen);

  2606.         sws_scaleVec(filter->lumV, -lumaSharpen);

  2607.         sws_addVec(filter->lumH, id);

  2608.         sws_addVec(filter->lumV, id);

  2609.         sws_freeVec(id);

  2610.     }

  2611. 

  2612.     if (chromaHShift != 0.0)

  2613.         sws_shiftVec(filter->chrH, (int)(chromaHShift+0.5));

  2614. 

  2615.     if (chromaVShift != 0.0)

  2616.         sws_shiftVec(filter->chrV, (int)(chromaVShift+0.5));

  2617. 

  2618.     sws_normalizeVec(filter->chrH, 1.0);

  2619.     sws_normalizeVec(filter->chrV, 1.0);

  2620.     sws_normalizeVec(filter->lumH, 1.0);

  2621.     sws_normalizeVec(filter->lumV, 1.0);

  2622. 

  2623.     if (verbose) sws_printVec(filter->chrH);

  2624.     if (verbose) sws_printVec(filter->lumH);

  2625. 

  2626.     return filter;

  2627. }

  2628. 

  2629. /**

  2630.  * returns a normalized gaussian curve used to filter stuff

  2631.  * quality=3 is high quality, lowwer is lowwer quality

  2632.  */

  2633. SwsVector *sws_getGaussianVec(double variance, double quality){

  2634.     const int length= (int)(variance*quality + 0.5) | 1;

  2635.     int i;

  2636.     double *coeff= av_malloc(length*sizeof(double));

  2637.     double middle= (length-1)*0.5;

  2638.     SwsVector *vec= av_malloc(sizeof(SwsVector));

  2639. 

  2640.     vec->coeff= coeff;

  2641.     vec->length= length;

  2642. 

  2643.     for (i=0; i<length; i++)

  2644.     {

  2645.         double dist= i-middle;

  2646.         coeff[i]= exp( -dist*dist/(2*variance*variance) ) / sqrt(2*variance*PI);

  2647.     }

  2648. 

  2649.     sws_normalizeVec(vec, 1.0);

  2650. 

  2651.     return vec;

  2652. }

  2653. 

  2654. SwsVector *sws_getConstVec(double c, int length){

  2655.     int i;

  2656.     double *coeff= av_malloc(length*sizeof(double));

  2657.     SwsVector *vec= av_malloc(sizeof(SwsVector));

  2658. 

  2659.     vec->coeff= coeff;

  2660.     vec->length= length;

  2661. 

  2662.     for (i=0; i<length; i++)

  2663.         coeff[i]= c;

  2664. 

  2665.     return vec;

  2666. }

  2667. 

  2668. 

  2669. SwsVector *sws_getIdentityVec(void){

  2670.     return sws_getConstVec(1.0, 1);

  2671. }

  2672. 

  2673. double sws_dcVec(SwsVector *a){

  2674.     int i;

  2675.     double sum=0;

  2676. 

  2677.     for (i=0; i<a->length; i++)

  2678.         sum+= a->coeff[i];

  2679. 

  2680.     return sum;

  2681. }

  2682. 

  2683. void sws_scaleVec(SwsVector *a, double scalar){

  2684.     int i;

  2685. 

  2686.     for (i=0; i<a->length; i++)

  2687.         a->coeff[i]*= scalar;

  2688. }

  2689. 

  2690. void sws_normalizeVec(SwsVector *a, double height){

  2691.     sws_scaleVec(a, height/sws_dcVec(a));

  2692. }

  2693. 

  2694. static SwsVector *sws_getConvVec(SwsVector *a, SwsVector *b){

  2695.     int length= a->length + b->length - 1;

  2696.     double *coeff= av_malloc(length*sizeof(double));

  2697.     int i, j;

  2698.     SwsVector *vec= av_malloc(sizeof(SwsVector));

  2699. 

  2700.     vec->coeff= coeff;

  2701.     vec->length= length;

  2702. 

  2703.     for (i=0; i<length; i++) coeff[i]= 0.0;

  2704. 

  2705.     for (i=0; i<a->length; i++)

  2706.     {

  2707.         for (j=0; j<b->length; j++)

  2708.         {

  2709.             coeff[i+j]+= a->coeff[i]*b->coeff[j];

  2710.         }

  2711.     }

  2712. 

  2713.     return vec;

  2714. }

  2715. 

  2716. static SwsVector *sws_sumVec(SwsVector *a, SwsVector *b){

  2717.     int length= FFMAX(a->length, b->length);

  2718.     double *coeff= av_malloc(length*sizeof(double));

  2719.     int i;

  2720.     SwsVector *vec= av_malloc(sizeof(SwsVector));

  2721. 

  2722.     vec->coeff= coeff;

  2723.     vec->length= length;

  2724. 

  2725.     for (i=0; i<length; i++) coeff[i]= 0.0;

  2726. 

  2727.     for (i=0; i<a->length; i++) coeff[i + (length-1)/2 - (a->length-1)/2]+= a->coeff[i];

  2728.     for (i=0; i<b->length; i++) coeff[i + (length-1)/2 - (b->length-1)/2]+= b->coeff[i];

  2729. 

  2730.     return vec;

  2731. }

  2732. 

  2733. static SwsVector *sws_diffVec(SwsVector *a, SwsVector *b){

  2734.     int length= FFMAX(a->length, b->length);

  2735.     double *coeff= av_malloc(length*sizeof(double));

  2736.     int i;

  2737.     SwsVector *vec= av_malloc(sizeof(SwsVector));

  2738. 

  2739.     vec->coeff= coeff;

  2740.     vec->length= length;

  2741. 

  2742.     for (i=0; i<length; i++) coeff[i]= 0.0;

  2743. 

  2744.     for (i=0; i<a->length; i++) coeff[i + (length-1)/2 - (a->length-1)/2]+= a->coeff[i];

  2745.     for (i=0; i<b->length; i++) coeff[i + (length-1)/2 - (b->length-1)/2]-= b->coeff[i];

  2746. 

  2747.     return vec;

  2748. }

  2749. 

  2750. /* shift left / or right if "shift" is negative */

  2751. static SwsVector *sws_getShiftedVec(SwsVector *a, int shift){

  2752.     int length= a->length + FFABS(shift)*2;

  2753.     double *coeff= av_malloc(length*sizeof(double));

  2754.     int i;

  2755.     SwsVector *vec= av_malloc(sizeof(SwsVector));

  2756. 

  2757.     vec->coeff= coeff;

  2758.     vec->length= length;

  2759. 

  2760.     for (i=0; i<length; i++) coeff[i]= 0.0;

  2761. 

  2762.     for (i=0; i<a->length; i++)

  2763.     {

  2764.         coeff[i + (length-1)/2 - (a->length-1)/2 - shift]= a->coeff[i];

  2765.     }

  2766. 

  2767.     return vec;

  2768. }

  2769. 

  2770. void sws_shiftVec(SwsVector *a, int shift){

  2771.     SwsVector *shifted= sws_getShiftedVec(a, shift);

  2772.     av_free(a->coeff);

  2773.     a->coeff= shifted->coeff;

  2774.     a->length= shifted->length;

  2775.     av_free(shifted);

  2776. }

  2777. 

  2778. void sws_addVec(SwsVector *a, SwsVector *b){

  2779.     SwsVector *sum= sws_sumVec(a, b);

  2780.     av_free(a->coeff);

  2781.     a->coeff= sum->coeff;

  2782.     a->length= sum->length;

  2783.     av_free(sum);

  2784. }

  2785. 

  2786. void sws_subVec(SwsVector *a, SwsVector *b){

  2787.     SwsVector *diff= sws_diffVec(a, b);

  2788.     av_free(a->coeff);

  2789.     a->coeff= diff->coeff;

  2790.     a->length= diff->length;

  2791.     av_free(diff);

  2792. }

  2793. 

  2794. void sws_convVec(SwsVector *a, SwsVector *b){

  2795.     SwsVector *conv= sws_getConvVec(a, b);

  2796.     av_free(a->coeff);

  2797.     a->coeff= conv->coeff;

  2798.     a->length= conv->length;

  2799.     av_free(conv);

  2800. }

  2801. 

  2802. SwsVector *sws_cloneVec(SwsVector *a){

  2803.     double *coeff= av_malloc(a->length*sizeof(double));

  2804.     int i;

  2805.     SwsVector *vec= av_malloc(sizeof(SwsVector));

  2806. 

  2807.     vec->coeff= coeff;

  2808.     vec->length= a->length;

  2809. 

  2810.     for (i=0; i<a->length; i++) coeff[i]= a->coeff[i];

  2811. 

  2812.     return vec;

  2813. }

  2814. 

  2815. void sws_printVec(SwsVector *a){

  2816.     int i;

  2817.     double max=0;

  2818.     double min=0;

  2819.     double range;

  2820. 

  2821.     for (i=0; i<a->length; i++)

  2822.         if (a->coeff[i]>max) max= a->coeff[i];

  2823. 

  2824.     for (i=0; i<a->length; i++)

  2825.         if (a->coeff[i]<min) min= a->coeff[i];

  2826. 

  2827.     range= max - min;

  2828. 

  2829.     for (i=0; i<a->length; i++)

  2830.     {

  2831.         int x= (int)((a->coeff[i]-min)*60.0/range +0.5);

  2832.         av_log(NULL, AV_LOG_DEBUG, "%1.3f ", a->coeff[i]);

  2833.         for (;x>0; x--) av_log(NULL, AV_LOG_DEBUG, " ");

  2834.         av_log(NULL, AV_LOG_DEBUG, "|\n");

  2835.     }

  2836. }

  2837. 

  2838. void sws_freeVec(SwsVector *a){

  2839.     if (!a) return;

  2840.     av_free(a->coeff);

  2841.     a->coeff=NULL;

  2842.     a->length=0;

  2843.     av_free(a);

  2844. }

  2845. 

  2846. void sws_freeFilter(SwsFilter *filter){

  2847.     if (!filter) return;

  2848. 

  2849.     if (filter->lumH) sws_freeVec(filter->lumH);

  2850.     if (filter->lumV) sws_freeVec(filter->lumV);

  2851.     if (filter->chrH) sws_freeVec(filter->chrH);

  2852.     if (filter->chrV) sws_freeVec(filter->chrV);

  2853.     av_free(filter);

  2854. }

  2855. 

  2856. 

  2857. void sws_freeContext(SwsContext *c){

  2858.     int i;

  2859.     if (!c) return;

  2860. 

  2861.     if (c->lumPixBuf)

  2862.     {

  2863.         for (i=0; i<c->vLumBufSize; i++)

  2864.         {

  2865.             av_free(c->lumPixBuf[i]);

  2866.             c->lumPixBuf[i]=NULL;

  2867.         }

  2868.         av_free(c->lumPixBuf);

  2869.         c->lumPixBuf=NULL;

  2870.     }

  2871. 

  2872.     if (c->chrPixBuf)

  2873.     {

  2874.         for (i=0; i<c->vChrBufSize; i++)

  2875.         {

  2876.             av_free(c->chrPixBuf[i]);

  2877.             c->chrPixBuf[i]=NULL;

  2878.         }

  2879.         av_free(c->chrPixBuf);

  2880.         c->chrPixBuf=NULL;

  2881.     }

  2882. 

  2883.     av_free(c->vLumFilter);

  2884.     c->vLumFilter = NULL;

  2885.     av_free(c->vChrFilter);

  2886.     c->vChrFilter = NULL;

  2887.     av_free(c->hLumFilter);

  2888.     c->hLumFilter = NULL;

  2889.     av_free(c->hChrFilter);

  2890.     c->hChrFilter = NULL;

  2891. #ifdef HAVE_ALTIVEC

  2892.     av_free(c->vYCoeffsBank);

  2893.     c->vYCoeffsBank = NULL;

  2894.     av_free(c->vCCoeffsBank);

  2895.     c->vCCoeffsBank = NULL;

  2896. #endif

  2897. 

  2898.     av_free(c->vLumFilterPos);

  2899.     c->vLumFilterPos = NULL;

  2900.     av_free(c->vChrFilterPos);

  2901.     c->vChrFilterPos = NULL;

  2902.     av_free(c->hLumFilterPos);

  2903.     c->hLumFilterPos = NULL;

  2904.     av_free(c->hChrFilterPos);

  2905.     c->hChrFilterPos = NULL;

  2906. 

  2907. #if defined(ARCH_X86) && defined(CONFIG_GPL)

  2908. #ifdef MAP_ANONYMOUS

  2909.     if (c->funnyYCode) munmap(c->funnyYCode, MAX_FUNNY_CODE_SIZE);

  2910.     if (c->funnyUVCode) munmap(c->funnyUVCode, MAX_FUNNY_CODE_SIZE);

  2911. #else

  2912.     av_free(c->funnyYCode);

  2913.     av_free(c->funnyUVCode);

  2914. #endif

  2915.     c->funnyYCode=NULL;

  2916.     c->funnyUVCode=NULL;

  2917. #endif /* defined(ARCH_X86) */

  2918. 

  2919.     av_free(c->lumMmx2Filter);

  2920.     c->lumMmx2Filter=NULL;

  2921.     av_free(c->chrMmx2Filter);

  2922.     c->chrMmx2Filter=NULL;

  2923.     av_free(c->lumMmx2FilterPos);

  2924.     c->lumMmx2FilterPos=NULL;

  2925.     av_free(c->chrMmx2FilterPos);

  2926.     c->chrMmx2FilterPos=NULL;

  2927.     av_free(c->yuvTable);

  2928.     c->yuvTable=NULL;

  2929. 

  2930.     av_free(c);

  2931. }

  2932. 

  2933. /**

  2934.  * Checks if context is valid or reallocs a new one instead.

  2935.  * If context is NULL, just calls sws_getContext() to get a new one.

  2936.  * Otherwise, checks if the parameters are the same already saved in context.

  2937.  * If that is the case, returns the current context.

  2938.  * Otherwise, frees context and gets a new one.

  2939.  *

  2940.  * Be warned that srcFilter, dstFilter are not checked, they are

  2941.  * asumed to remain valid.

  2942.  */

  2943. struct SwsContext *sws_getCachedContext(struct SwsContext *context,

  2944.                                         int srcW, int srcH, int srcFormat,

  2945.                                         int dstW, int dstH, int dstFormat, int flags,

  2946.                                         SwsFilter *srcFilter, SwsFilter *dstFilter, double *param)

  2947. {

  2948.     if (context != NULL) {

  2949.         if ((context->srcW != srcW) || (context->srcH != srcH) ||

  2950.             (context->srcFormat != srcFormat) ||

  2951.             (context->dstW != dstW) || (context->dstH != dstH) ||

  2952.             (context->dstFormat != dstFormat) || (context->flags != flags) ||

  2953.             (context->param != param))

  2954.         {

  2955.             sws_freeContext(context);

  2956.             context = NULL;

  2957.         }

  2958.     }

  2959.     if (context == NULL) {

  2960.         return sws_getContext(srcW, srcH, srcFormat,

  2961.                               dstW, dstH, dstFormat, flags,

  2962.                               srcFilter, dstFilter, param);

  2963.     }

  2964.     return context;

  2965. }