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FFmpeg/libswscale/swscale.c

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  1. /*

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

  3.  *

  4.  * This file is part of FFmpeg.

  5.  *

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

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

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

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

  10.  *

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

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

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

  14.  * GNU General Public License for more details.

  15.  *

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

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

  18.  * Foundation, Inc., 51 Franklin 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 did not 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 "rgb2rgb.h"

  73. #include "libavutil/x86_cpu.h"

  74. #include "libavutil/bswap.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 M_PI

  92. #define PI M_PI

  93. #else

  94. #define PI 3.14159265358979323846

  95. #endif

  96. 

  97. #define isSupportedIn(x)    (       \

  98.            (x)==PIX_FMT_YUV420P     \

  99.         || (x)==PIX_FMT_YUVA420P    \

  100.         || (x)==PIX_FMT_YUYV422     \

  101.         || (x)==PIX_FMT_UYVY422     \

  102.         || (x)==PIX_FMT_RGB32       \

  103.         || (x)==PIX_FMT_BGR24       \

  104.         || (x)==PIX_FMT_BGR565      \

  105.         || (x)==PIX_FMT_BGR555      \

  106.         || (x)==PIX_FMT_BGR32       \

  107.         || (x)==PIX_FMT_RGB24       \

  108.         || (x)==PIX_FMT_RGB565      \

  109.         || (x)==PIX_FMT_RGB555      \

  110.         || (x)==PIX_FMT_GRAY8       \

  111.         || (x)==PIX_FMT_YUV410P     \

  112.         || (x)==PIX_FMT_GRAY16BE    \

  113.         || (x)==PIX_FMT_GRAY16LE    \

  114.         || (x)==PIX_FMT_YUV444P     \

  115.         || (x)==PIX_FMT_YUV422P     \

  116.         || (x)==PIX_FMT_YUV411P     \

  117.         || (x)==PIX_FMT_PAL8        \

  118.         || (x)==PIX_FMT_BGR8        \

  119.         || (x)==PIX_FMT_RGB8        \

  120.         || (x)==PIX_FMT_BGR4_BYTE   \

  121.         || (x)==PIX_FMT_RGB4_BYTE   \

  122.         || (x)==PIX_FMT_YUV440P     \

  123.     )

  124. #define isSupportedOut(x)   (       \

  125.            (x)==PIX_FMT_YUV420P     \

  126.         || (x)==PIX_FMT_YUYV422     \

  127.         || (x)==PIX_FMT_UYVY422     \

  128.         || (x)==PIX_FMT_YUV444P     \

  129.         || (x)==PIX_FMT_YUV422P     \

  130.         || (x)==PIX_FMT_YUV411P     \

  131.         || isRGB(x)                 \

  132.         || isBGR(x)                 \

  133.         || (x)==PIX_FMT_NV12        \

  134.         || (x)==PIX_FMT_NV21        \

  135.         || (x)==PIX_FMT_GRAY16BE    \

  136.         || (x)==PIX_FMT_GRAY16LE    \

  137.         || (x)==PIX_FMT_GRAY8       \

  138.         || (x)==PIX_FMT_YUV410P     \

  139.     )

  140. #define isPacked(x)         (       \

  141.            (x)==PIX_FMT_PAL8        \

  142.         || (x)==PIX_FMT_YUYV422     \

  143.         || (x)==PIX_FMT_UYVY422     \

  144.         || isRGB(x)                 \

  145.         || isBGR(x)                 \

  146.     )

  147. 

  148. #define RGB2YUV_SHIFT 16

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

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

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

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

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

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

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

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

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

  158. 

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

  160. 

  161. /*

  162. NOTES

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

  164. 

  165. TODO

  166. more intelligent misalignment avoidance for the horizontal scaler

  167. write special vertical cubic upscale version

  168. Optimize C code (yv12 / minmax)

  169. add support for packed pixel yuv input & output

  170. add support for Y8 output

  171. optimize bgr24 & bgr32

  172. add BGR4 output support

  173. write special BGR->BGR scaler

  174. */

  175. 

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

  177. DECLARE_ASM_CONST(8, uint64_t, bF8)=       0xF8F8F8F8F8F8F8F8LL;

  178. DECLARE_ASM_CONST(8, uint64_t, bFC)=       0xFCFCFCFCFCFCFCFCLL;

  179. DECLARE_ASM_CONST(8, uint64_t, w10)=       0x0010001000100010LL;

  180. DECLARE_ASM_CONST(8, uint64_t, w02)=       0x0002000200020002LL;

  181. DECLARE_ASM_CONST(8, uint64_t, bm00001111)=0x00000000FFFFFFFFLL;

  182. DECLARE_ASM_CONST(8, uint64_t, bm00000111)=0x0000000000FFFFFFLL;

  183. DECLARE_ASM_CONST(8, uint64_t, bm11111000)=0xFFFFFFFFFF000000LL;

  184. DECLARE_ASM_CONST(8, uint64_t, bm01010101)=0x00FF00FF00FF00FFLL;

  185. 

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

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

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

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

  190. 

  191. const DECLARE_ALIGNED(8, uint64_t, ff_dither4[2]) = {

  192.         0x0103010301030103LL,

  193.         0x0200020002000200LL,};

  194. 

  195. const DECLARE_ALIGNED(8, uint64_t, ff_dither8[2]) = {

  196.         0x0602060206020602LL,

  197.         0x0004000400040004LL,};

  198. 

  199. DECLARE_ASM_CONST(8, uint64_t, b16Mask)=   0x001F001F001F001FLL;

  200. DECLARE_ASM_CONST(8, uint64_t, g16Mask)=   0x07E007E007E007E0LL;

  201. DECLARE_ASM_CONST(8, uint64_t, r16Mask)=   0xF800F800F800F800LL;

  202. DECLARE_ASM_CONST(8, uint64_t, b15Mask)=   0x001F001F001F001FLL;

  203. DECLARE_ASM_CONST(8, uint64_t, g15Mask)=   0x03E003E003E003E0LL;

  204. DECLARE_ASM_CONST(8, uint64_t, r15Mask)=   0x7C007C007C007C00LL;

  205. 

  206. DECLARE_ALIGNED(8, const uint64_t, ff_M24A)         = 0x00FF0000FF0000FFLL;

  207. DECLARE_ALIGNED(8, const uint64_t, ff_M24B)         = 0xFF0000FF0000FF00LL;

  208. DECLARE_ALIGNED(8, const uint64_t, ff_M24C)         = 0x0000FF0000FF0000LL;

  209. 

  210. #ifdef FAST_BGR2YV12

  211. DECLARE_ALIGNED(8, const uint64_t, ff_bgr2YCoeff)   = 0x000000210041000DULL;

  212. DECLARE_ALIGNED(8, const uint64_t, ff_bgr2UCoeff)   = 0x0000FFEEFFDC0038ULL;

  213. DECLARE_ALIGNED(8, const uint64_t, ff_bgr2VCoeff)   = 0x00000038FFD2FFF8ULL;

  214. #else

  215. DECLARE_ALIGNED(8, const uint64_t, ff_bgr2YCoeff)   = 0x000020E540830C8BULL;

  216. DECLARE_ALIGNED(8, const uint64_t, ff_bgr2UCoeff)   = 0x0000ED0FDAC23831ULL;

  217. DECLARE_ALIGNED(8, const uint64_t, ff_bgr2VCoeff)   = 0x00003831D0E6F6EAULL;

  218. #endif /* FAST_BGR2YV12 */

  219. DECLARE_ALIGNED(8, const uint64_t, ff_bgr2YOffset)  = 0x1010101010101010ULL;

  220. DECLARE_ALIGNED(8, const uint64_t, ff_bgr2UVOffset) = 0x8080808080808080ULL;

  221. DECLARE_ALIGNED(8, const uint64_t, ff_w1111)        = 0x0001000100010001ULL;

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

  223. 

  224. // clipping helper table for C implementations:

  225. static unsigned char clip_table[768];

  226. 

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

  228. 

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

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

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

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

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

  234. 

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

  236.     return "swscaler";

  237. }

  238. 

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

  240. #define DEFAULT 0

  241. #define VE AV_OPT_FLAG_VIDEO_PARAM | AV_OPT_FLAG_ENCODING_PARAM

  242. 

  243. static const AVOption options[] = {

  244.     { "sws_flags", "scaler/cpu flags", OFFSET(flags), FF_OPT_TYPE_FLAGS, DEFAULT, 0, UINT_MAX, VE, "sws_flags" },

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

  260.     { "3dnow", "3DNOW SIMD acceleration", 0, FF_OPT_TYPE_CONST, SWS_CPU_CAPS_3DNOW, INT_MIN, INT_MAX, VE, "sws_flags" },

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

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

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

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

  265.     { NULL }

  266. };

  267. 

  268. #undef VE

  269. #undef DEFAULT

  270. 

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

  272. 

  273. const char *sws_format_name(enum PixelFormat format)

  274. {

  275.     switch (format) {

  276.         case PIX_FMT_YUV420P:

  277.             return "yuv420p";

  278.         case PIX_FMT_YUVA420P:

  279.             return "yuva420p";

  280.         case PIX_FMT_YUYV422:

  281.             return "yuyv422";

  282.         case PIX_FMT_RGB24:

  283.             return "rgb24";

  284.         case PIX_FMT_BGR24:

  285.             return "bgr24";

  286.         case PIX_FMT_YUV422P:

  287.             return "yuv422p";

  288.         case PIX_FMT_YUV444P:

  289.             return "yuv444p";

  290.         case PIX_FMT_RGB32:

  291.             return "rgb32";

  292.         case PIX_FMT_YUV410P:

  293.             return "yuv410p";

  294.         case PIX_FMT_YUV411P:

  295.             return "yuv411p";

  296.         case PIX_FMT_RGB565:

  297.             return "rgb565";

  298.         case PIX_FMT_RGB555:

  299.             return "rgb555";

  300.         case PIX_FMT_GRAY16BE:

  301.             return "gray16be";

  302.         case PIX_FMT_GRAY16LE:

  303.             return "gray16le";

  304.         case PIX_FMT_GRAY8:

  305.             return "gray8";

  306.         case PIX_FMT_MONOWHITE:

  307.             return "mono white";

  308.         case PIX_FMT_MONOBLACK:

  309.             return "mono black";

  310.         case PIX_FMT_PAL8:

  311.             return "Palette";

  312.         case PIX_FMT_YUVJ420P:

  313.             return "yuvj420p";

  314.         case PIX_FMT_YUVJ422P:

  315.             return "yuvj422p";

  316.         case PIX_FMT_YUVJ444P:

  317.             return "yuvj444p";

  318.         case PIX_FMT_XVMC_MPEG2_MC:

  319.             return "xvmc_mpeg2_mc";

  320.         case PIX_FMT_XVMC_MPEG2_IDCT:

  321.             return "xvmc_mpeg2_idct";

  322.         case PIX_FMT_UYVY422:

  323.             return "uyvy422";

  324.         case PIX_FMT_UYYVYY411:

  325.             return "uyyvyy411";

  326.         case PIX_FMT_RGB32_1:

  327.             return "rgb32x";

  328.         case PIX_FMT_BGR32_1:

  329.             return "bgr32x";

  330.         case PIX_FMT_BGR32:

  331.             return "bgr32";

  332.         case PIX_FMT_BGR565:

  333.             return "bgr565";

  334.         case PIX_FMT_BGR555:

  335.             return "bgr555";

  336.         case PIX_FMT_BGR8:

  337.             return "bgr8";

  338.         case PIX_FMT_BGR4:

  339.             return "bgr4";

  340.         case PIX_FMT_BGR4_BYTE:

  341.             return "bgr4 byte";

  342.         case PIX_FMT_RGB8:

  343.             return "rgb8";

  344.         case PIX_FMT_RGB4:

  345.             return "rgb4";

  346.         case PIX_FMT_RGB4_BYTE:

  347.             return "rgb4 byte";

  348.         case PIX_FMT_NV12:

  349.             return "nv12";

  350.         case PIX_FMT_NV21:

  351.             return "nv21";

  352.         case PIX_FMT_YUV440P:

  353.             return "yuv440p";

  354.         default:

  355.             return "Unknown format";

  356.     }

  357. }

  358. 

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

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

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

  362. {

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

  364.     int i;

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

  366.     {

  367.         int val=1<<18;

  368.         int j;

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

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

  371. 

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

  373.     }

  374. 

  375.     if (uDest)

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

  377.         {

  378.             int u=1<<18;

  379.             int v=1<<18;

  380.             int j;

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

  382.             {

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

  384.                 v += chrSrc[j][i + VOFW] * chrFilter[j];

  385.             }

  386. 

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

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

  389.         }

  390. }

  391. 

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

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

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

  395. {

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

  397.     int i;

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

  399.     {

  400.         int val=1<<18;

  401.         int j;

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

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

  404. 

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

  406.     }

  407. 

  408.     if (!uDest)

  409.         return;

  410. 

  411.     if (dstFormat == PIX_FMT_NV12)

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

  413.         {

  414.             int u=1<<18;

  415.             int v=1<<18;

  416.             int j;

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

  418.             {

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

  420.                 v += chrSrc[j][i + VOFW] * chrFilter[j];

  421.             }

  422. 

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

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

  425.         }

  426.     else

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

  428.         {

  429.             int u=1<<18;

  430.             int v=1<<18;

  431.             int j;

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

  433.             {

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

  435.                 v += chrSrc[j][i + VOFW] * chrFilter[j];

  436.             }

  437. 

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

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

  440.         }

  441. }

  442. 

  443. #define YSCALE_YUV_2_PACKEDX_C(type) \

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

  445.         int j;\

  446.         int Y1 = 1<<18;\

  447.         int Y2 = 1<<18;\

  448.         int U  = 1<<18;\

  449.         int V  = 1<<18;\

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

  451.         const int i2= 2*i;\

  452.         \

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

  454.         {\

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

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

  457.         }\

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

  459.         {\

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

  461.             V += chrSrc[j][i+VOFW] * chrFilter[j];\

  462.         }\

  463.         Y1>>=19;\

  464.         Y2>>=19;\

  465.         U >>=19;\

  466.         V >>=19;\

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

  468.         {\

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

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

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

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

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

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

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

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

  477.         }

  478. 

  479. #define YSCALE_YUV_2_RGBX_C(type) \

  480.     YSCALE_YUV_2_PACKEDX_C(type)  \

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

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

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

  484. 

  485. #define YSCALE_YUV_2_PACKED2_C   \

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

  487.         const int i2= 2*i;       \

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

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

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

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

  492. 

  493. #define YSCALE_YUV_2_RGB2_C(type) \

  494.     YSCALE_YUV_2_PACKED2_C\

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

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

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

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

  499. 

  500. #define YSCALE_YUV_2_PACKED1_C \

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

  502.         const int i2= 2*i;\

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

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

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

  506.         int V= (uvbuf1[i+VOFW])>>7;\

  507. 

  508. #define YSCALE_YUV_2_RGB1_C(type) \

  509.     YSCALE_YUV_2_PACKED1_C\

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

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

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

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

  514. 

  515. #define YSCALE_YUV_2_PACKED1B_C \

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

  517.         const int i2= 2*i;\

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

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

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

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

  522. 

  523. #define YSCALE_YUV_2_RGB1B_C(type) \

  524.     YSCALE_YUV_2_PACKED1B_C\

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

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

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

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

  529. 

  530. #define YSCALE_YUV_2_ANYRGB_C(func, func2)\

  531.     switch(c->dstFormat)\

  532.     {\

  533.     case PIX_FMT_RGB32:\

  534.     case PIX_FMT_BGR32:\

  535.         func(uint32_t)\

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

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

  538.         }                \

  539.         break;\

  540.     case PIX_FMT_RGB24:\

  541.         func(uint8_t)\

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

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

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

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

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

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

  548.             dest+=6;\

  549.         }\

  550.         break;\

  551.     case PIX_FMT_BGR24:\

  552.         func(uint8_t)\

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

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

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

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

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

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

  559.             dest+=6;\

  560.         }\

  561.         break;\

  562.     case PIX_FMT_RGB565:\

  563.     case PIX_FMT_BGR565:\

  564.         {\

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

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

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

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

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

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

  571.             func(uint16_t)\

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

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

  574.             }\

  575.         }\

  576.         break;\

  577.     case PIX_FMT_RGB555:\

  578.     case PIX_FMT_BGR555:\

  579.         {\

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

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

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

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

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

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

  586.             func(uint16_t)\

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

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

  589.             }\

  590.         }\

  591.         break;\

  592.     case PIX_FMT_RGB8:\

  593.     case PIX_FMT_BGR8:\

  594.         {\

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

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

  597.             func(uint8_t)\

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

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

  600.             }\

  601.         }\

  602.         break;\

  603.     case PIX_FMT_RGB4:\

  604.     case PIX_FMT_BGR4:\

  605.         {\

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

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

  608.             func(uint8_t)\

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

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

  611.             }\

  612.         }\

  613.         break;\

  614.     case PIX_FMT_RGB4_BYTE:\

  615.     case PIX_FMT_BGR4_BYTE:\

  616.         {\

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

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

  619.             func(uint8_t)\

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

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

  622.             }\

  623.         }\

  624.         break;\

  625.     case PIX_FMT_MONOBLACK:\

  626.         {\

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

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

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

  630.                 int acc;\

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

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

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

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

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

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

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

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

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

  640.                 dest++;\

  641.             }\

  642. \

  643. /*\

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

  645. {\

  646.             int acc=0;\

  647.             int left=0;\

  648.             static int top[1024];\

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

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

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

  652.             int topLeft=0;\

  653.             int shift=0;\

  654.             int count=0;\

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

  656.             int error_new=0;\

  657.             int error_in3=0;\

  658.             int f=0;\

  659.             \

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

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

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

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

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

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

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

  667. \

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

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

  670.                 f= error_new - error_in3*4;\

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

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

  673. \

  674.                 topLeft= top[i];\

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

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

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

  678. \

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

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

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

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

  683.                 }\

  684.             }\

  685. }\

  686. */\

  687.         }\

  688.         break;\

  689.     case PIX_FMT_YUYV422:\

  690.         func2\

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

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

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

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

  695.         }                \

  696.         break;\

  697.     case PIX_FMT_UYVY422:\

  698.         func2\

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

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

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

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

  703.         }                \

  704.         break;\

  705.     }\

  706. 

  707. 

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

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

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

  711. {

  712.     int i;

  713.     switch(c->dstFormat)

  714.     {

  715.     case PIX_FMT_BGR32:

  716.     case PIX_FMT_RGB32:

  717.         YSCALE_YUV_2_RGBX_C(uint32_t)

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

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

  720.         }

  721.         break;

  722.     case PIX_FMT_RGB24:

  723.         YSCALE_YUV_2_RGBX_C(uint8_t)

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

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

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

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

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

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

  730.             dest+=6;

  731.         }

  732.         break;

  733.     case PIX_FMT_BGR24:

  734.         YSCALE_YUV_2_RGBX_C(uint8_t)

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

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

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

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

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

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

  741.             dest+=6;

  742.         }

  743.         break;

  744.     case PIX_FMT_RGB565:

  745.     case PIX_FMT_BGR565:

  746.         {

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

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

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

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

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

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

  753.             YSCALE_YUV_2_RGBX_C(uint16_t)

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

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

  756.             }

  757.         }

  758.         break;

  759.     case PIX_FMT_RGB555:

  760.     case PIX_FMT_BGR555:

  761.         {

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

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

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

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

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

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

  768.             YSCALE_YUV_2_RGBX_C(uint16_t)

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

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

  771.             }

  772.         }

  773.         break;

  774.     case PIX_FMT_RGB8:

  775.     case PIX_FMT_BGR8:

  776.         {

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

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

  779.             YSCALE_YUV_2_RGBX_C(uint8_t)

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

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

  782.             }

  783.         }

  784.         break;

  785.     case PIX_FMT_RGB4:

  786.     case PIX_FMT_BGR4:

  787.         {

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

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

  790.             YSCALE_YUV_2_RGBX_C(uint8_t)

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

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

  793.             }

  794.         }

  795.         break;

  796.     case PIX_FMT_RGB4_BYTE:

  797.     case PIX_FMT_BGR4_BYTE:

  798.         {

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

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

  801.             YSCALE_YUV_2_RGBX_C(uint8_t)

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

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

  804.             }

  805.         }

  806.         break;

  807.     case PIX_FMT_MONOBLACK:

  808.         {

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

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

  811.             int acc=0;

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

  813.                 int j;

  814.                 int Y1=1<<18;

  815.                 int Y2=1<<18;

  816. 

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

  818.                 {

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

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

  821.                 }

  822.                 Y1>>=19;

  823.                 Y2>>=19;

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

  825.                 {

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

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

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

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

  830.                 }

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

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

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

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

  835.                     dest++;

  836.                 }

  837.             }

  838.         }

  839.         break;

  840.     case PIX_FMT_YUYV422:

  841.         YSCALE_YUV_2_PACKEDX_C(void)

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

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

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

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

  846.         }

  847.         break;

  848.     case PIX_FMT_UYVY422:

  849.         YSCALE_YUV_2_PACKEDX_C(void)

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

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

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

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

  854.         }

  855.         break;

  856.     }

  857. }

  858. 

  859. 

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

  861. //Plain C versions

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

  863. #define COMPILE_C

  864. #endif

  865. 

  866. #ifdef ARCH_POWERPC

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

  868. #define COMPILE_ALTIVEC

  869. #endif //HAVE_ALTIVEC

  870. #endif //ARCH_POWERPC

  871. 

  872. #if defined(ARCH_X86)

  873. 

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

  875. #define COMPILE_MMX

  876. #endif

  877. 

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

  879. #define COMPILE_MMX2

  880. #endif

  881. 

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

  883. #define COMPILE_3DNOW

  884. #endif

  885. #endif //ARCH_X86 || ARCH_X86_64

  886. 

  887. #undef HAVE_MMX

  888. #undef HAVE_MMX2

  889. #undef HAVE_3DNOW

  890. 

  891. #ifdef COMPILE_C

  892. #undef HAVE_MMX

  893. #undef HAVE_MMX2

  894. #undef HAVE_3DNOW

  895. #undef HAVE_ALTIVEC

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

  897. #include "swscale_template.c"

  898. #endif

  899. 

  900. #ifdef COMPILE_ALTIVEC

  901. #undef RENAME

  902. #define HAVE_ALTIVEC

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

  904. #include "swscale_template.c"

  905. #endif

  906. 

  907. #if defined(ARCH_X86)

  908. 

  909. //X86 versions

  910. /*

  911. #undef RENAME

  912. #undef HAVE_MMX

  913. #undef HAVE_MMX2

  914. #undef HAVE_3DNOW

  915. #define ARCH_X86

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

  917. #include "swscale_template.c"

  918. */

  919. //MMX versions

  920. #ifdef COMPILE_MMX

  921. #undef RENAME

  922. #define HAVE_MMX

  923. #undef HAVE_MMX2

  924. #undef HAVE_3DNOW

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

  926. #include "swscale_template.c"

  927. #endif

  928. 

  929. //MMX2 versions

  930. #ifdef COMPILE_MMX2

  931. #undef RENAME

  932. #define HAVE_MMX

  933. #define HAVE_MMX2

  934. #undef HAVE_3DNOW

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

  936. #include "swscale_template.c"

  937. #endif

  938. 

  939. //3DNOW versions

  940. #ifdef COMPILE_3DNOW

  941. #undef RENAME

  942. #define HAVE_MMX

  943. #undef HAVE_MMX2

  944. #define HAVE_3DNOW

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

  946. #include "swscale_template.c"

  947. #endif

  948. 

  949. #endif //ARCH_X86 || ARCH_X86_64

  950. 

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

  952. 

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

  954. {

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

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

  957.     else                return getSplineCoeff(        0.0,

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

  959.                                                     c + 3.0*d,

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

  961.                                             dist-1.0);

  962. }

  963. 

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

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

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

  967. {

  968.     int i;

  969.     int filterSize;

  970.     int filter2Size;

  971.     int minFilterSize;

  972.     double *filter=NULL;

  973.     double *filter2=NULL;

  974. #if defined(ARCH_X86)

  975.     if (flags & SWS_CPU_CAPS_MMX)

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

  977. #endif

  978. 

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

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

  981. 

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

  983.     {

  984.         int i;

  985.         filterSize= 1;

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

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

  988. 

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

  990.         {

  991.             filter[i*filterSize]=1;

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

  993.         }

  994. 

  995.     }

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

  997.     {

  998.         int i;

  999.         int xDstInSrc;

  1000.         filterSize= 1;

  1001.         filter= av_malloc(dstW*sizeof(double)*filterSize);

  1002. 

  1003.         xDstInSrc= xInc/2 - 0x8000;

  1004.         for (i=0; i<dstW; i++)

  1005.         {

  1006.             int xx= (xDstInSrc - ((filterSize-1)<<15) + (1<<15))>>16;

  1007. 

  1008.             (*filterPos)[i]= xx;

  1009.             filter[i]= 1.0;

  1010.             xDstInSrc+= xInc;

  1011.         }

  1012.     }

  1013.     else if ((xInc <= (1<<16) && (flags&SWS_AREA)) || (flags&SWS_FAST_BILINEAR)) // bilinear upscale

  1014.     {

  1015.         int i;

  1016.         int xDstInSrc;

  1017.         if      (flags&SWS_BICUBIC) filterSize= 4;

  1018.         else if (flags&SWS_X      ) filterSize= 4;

  1019.         else                        filterSize= 2; // SWS_BILINEAR / SWS_AREA

  1020.         filter= av_malloc(dstW*sizeof(double)*filterSize);

  1021. 

  1022.         xDstInSrc= xInc/2 - 0x8000;

  1023.         for (i=0; i<dstW; i++)

  1024.         {

  1025.             int xx= (xDstInSrc - ((filterSize-1)<<15) + (1<<15))>>16;

  1026.             int j;

  1027. 

  1028.             (*filterPos)[i]= xx;

  1029.                 //Bilinear upscale / linear interpolate / Area averaging

  1030.                 for (j=0; j<filterSize; j++)

  1031.                 {

  1032.                     double d= FFABS((xx<<16) - xDstInSrc)/(double)(1<<16);

  1033.                     double coeff= 1.0 - d;

  1034.                     if (coeff<0) coeff=0;

  1035.                     filter[i*filterSize + j]= coeff;

  1036.                     xx++;

  1037.                 }

  1038.             xDstInSrc+= xInc;

  1039.         }

  1040.     }

  1041.     else

  1042.     {

  1043.         double xDstInSrc;

  1044.         double sizeFactor, filterSizeInSrc;

  1045.         const double xInc1= (double)xInc / (double)(1<<16);

  1046. 

  1047.         if      (flags&SWS_BICUBIC)      sizeFactor=  4.0;

  1048.         else if (flags&SWS_X)            sizeFactor=  8.0;

  1049.         else if (flags&SWS_AREA)         sizeFactor=  1.0; //downscale only, for upscale it is bilinear

  1050.         else if (flags&SWS_GAUSS)        sizeFactor=  8.0;   // infinite ;)

  1051.         else if (flags&SWS_LANCZOS)      sizeFactor= param[0] != SWS_PARAM_DEFAULT ? 2.0*param[0] : 6.0;

  1052.         else if (flags&SWS_SINC)         sizeFactor= 20.0; // infinite ;)

  1053.         else if (flags&SWS_SPLINE)       sizeFactor= 20.0;  // infinite ;)

  1054.         else if (flags&SWS_BILINEAR)     sizeFactor=  2.0;

  1055.         else {

  1056.             sizeFactor= 0.0; //GCC warning killer

  1057.             assert(0);

  1058.         }

  1059. 

  1060.         if (xInc1 <= 1.0)       filterSizeInSrc= sizeFactor; // upscale

  1061.         else                    filterSizeInSrc= sizeFactor*srcW / (double)dstW;

  1062. 

  1063.         filterSize= (int)ceil(1 + filterSizeInSrc); // will be reduced later if possible

  1064.         if (filterSize > srcW-2) filterSize=srcW-2;

  1065. 

  1066.         filter= av_malloc(dstW*sizeof(double)*filterSize);

  1067. 

  1068.         xDstInSrc= xInc1 / 2.0 - 0.5;

  1069.         for (i=0; i<dstW; i++)

  1070.         {

  1071.             int xx= (int)(xDstInSrc - (filterSize-1)*0.5 + 0.5);

  1072.             int j;

  1073.             (*filterPos)[i]= xx;

  1074.             for (j=0; j<filterSize; j++)

  1075.             {

  1076.                 double d= FFABS(xx - xDstInSrc)/filterSizeInSrc*sizeFactor;

  1077.                 double coeff;

  1078.                 if (flags & SWS_BICUBIC)

  1079.                 {

  1080.                     double B= param[0] != SWS_PARAM_DEFAULT ? param[0] : 0.0;

  1081.                     double C= param[1] != SWS_PARAM_DEFAULT ? param[1] : 0.6;

  1082. 

  1083.                     if (d<1.0)

  1084.                         coeff = (12-9*B-6*C)*d*d*d + (-18+12*B+6*C)*d*d + 6-2*B;

  1085.                     else if (d<2.0)

  1086.                         coeff = (-B-6*C)*d*d*d + (6*B+30*C)*d*d + (-12*B-48*C)*d +8*B+24*C;

  1087.                     else

  1088.                         coeff=0.0;

  1089.                 }

  1090. /*                else if (flags & SWS_X)

  1091.                 {

  1092.                     double p= param ? param*0.01 : 0.3;

  1093.                     coeff = d ? sin(d*PI)/(d*PI) : 1.0;

  1094.                     coeff*= pow(2.0, - p*d*d);

  1095.                 }*/

  1096.                 else if (flags & SWS_X)

  1097.                 {

  1098.                     double A= param[0] != SWS_PARAM_DEFAULT ? param[0] : 1.0;

  1099. 

  1100.                     if (d<1.0)

  1101.                         coeff = cos(d*PI);

  1102.                     else

  1103.                         coeff=-1.0;

  1104.                     if (coeff<0.0)      coeff= -pow(-coeff, A);

  1105.                     else                coeff=  pow( coeff, A);

  1106.                     coeff= coeff*0.5 + 0.5;

  1107.                 }

  1108.                 else if (flags & SWS_AREA)

  1109.                 {

  1110.                     double srcPixelSize= 1.0/xInc1;

  1111.                     if      (d + srcPixelSize/2 < 0.5) coeff= 1.0;

  1112.                     else if (d - srcPixelSize/2 < 0.5) coeff= (0.5-d)/srcPixelSize + 0.5;

  1113.                     else coeff=0.0;

  1114.                 }

  1115.                 else if (flags & SWS_GAUSS)

  1116.                 {

  1117.                     double p= param[0] != SWS_PARAM_DEFAULT ? param[0] : 3.0;

  1118.                     coeff = pow(2.0, - p*d*d);

  1119.                 }

  1120.                 else if (flags & SWS_SINC)

  1121.                 {

  1122.                     coeff = d ? sin(d*PI)/(d*PI) : 1.0;

  1123.                 }

  1124.                 else if (flags & SWS_LANCZOS)

  1125.                 {

  1126.                     double p= param[0] != SWS_PARAM_DEFAULT ? param[0] : 3.0;

  1127.                     coeff = d ? sin(d*PI)*sin(d*PI/p)/(d*d*PI*PI/p) : 1.0;

  1128.                     if (d>p) coeff=0;

  1129.                 }

  1130.                 else if (flags & SWS_BILINEAR)

  1131.                 {

  1132.                     coeff= 1.0 - d;

  1133.                     if (coeff<0) coeff=0;

  1134.                 }

  1135.                 else if (flags & SWS_SPLINE)

  1136.                 {

  1137.                     double p=-2.196152422706632;

  1138.                     coeff = getSplineCoeff(1.0, 0.0, p, -p-1.0, d);

  1139.                 }

  1140.                 else {

  1141.                     coeff= 0.0; //GCC warning killer

  1142.                     assert(0);

  1143.                 }

  1144. 

  1145.                 filter[i*filterSize + j]= coeff;

  1146.                 xx++;

  1147.             }

  1148.             xDstInSrc+= xInc1;

  1149.         }

  1150.     }

  1151. 

  1152.     /* apply src & dst Filter to filter -> filter2

  1153.        av_free(filter);

  1154.     */

  1155.     assert(filterSize>0);

  1156.     filter2Size= filterSize;

  1157.     if (srcFilter) filter2Size+= srcFilter->length - 1;

  1158.     if (dstFilter) filter2Size+= dstFilter->length - 1;

  1159.     assert(filter2Size>0);

  1160.     filter2= av_malloc(filter2Size*dstW*sizeof(double));

  1161. 

  1162.     for (i=0; i<dstW; i++)

  1163.     {

  1164.         int j;

  1165.         SwsVector scaleFilter;

  1166.         SwsVector *outVec;

  1167. 

  1168.         scaleFilter.coeff= filter + i*filterSize;

  1169.         scaleFilter.length= filterSize;

  1170. 

  1171.         if (srcFilter) outVec= sws_getConvVec(srcFilter, &scaleFilter);

  1172.         else           outVec= &scaleFilter;

  1173. 

  1174.         assert(outVec->length == filter2Size);

  1175.         //FIXME dstFilter

  1176. 

  1177.         for (j=0; j<outVec->length; j++)

  1178.         {

  1179.             filter2[i*filter2Size + j]= outVec->coeff[j];

  1180.         }

  1181. 

  1182.         (*filterPos)[i]+= (filterSize-1)/2 - (filter2Size-1)/2;

  1183. 

  1184.         if (outVec != &scaleFilter) sws_freeVec(outVec);

  1185.     }

  1186.     av_free(filter); filter=NULL;

  1187. 

  1188.     /* try to reduce the filter-size (step1 find size and shift left) */

  1189.     // Assume it is near normalized (*0.5 or *2.0 is OK but * 0.001 is not).

  1190.     minFilterSize= 0;

  1191.     for (i=dstW-1; i>=0; i--)

  1192.     {

  1193.         int min= filter2Size;

  1194.         int j;

  1195.         double cutOff=0.0;

  1196. 

  1197.         /* get rid off near zero elements on the left by shifting left */

  1198.         for (j=0; j<filter2Size; j++)

  1199.         {

  1200.             int k;

  1201.             cutOff += FFABS(filter2[i*filter2Size]);

  1202. 

  1203.             if (cutOff > SWS_MAX_REDUCE_CUTOFF) break;

  1204. 

  1205.             /* preserve monotonicity because the core can't handle the filter otherwise */

  1206.             if (i<dstW-1 && (*filterPos)[i] >= (*filterPos)[i+1]) break;

  1207. 

  1208.             // Move filter coeffs left

  1209.             for (k=1; k<filter2Size; k++)

  1210.                 filter2[i*filter2Size + k - 1]= filter2[i*filter2Size + k];

  1211.             filter2[i*filter2Size + k - 1]= 0.0;

  1212.             (*filterPos)[i]++;

  1213.         }

  1214. 

  1215.         cutOff=0.0;

  1216.         /* count near zeros on the right */

  1217.         for (j=filter2Size-1; j>0; j--)

  1218.         {

  1219.             cutOff += FFABS(filter2[i*filter2Size + j]);

  1220. 

  1221.             if (cutOff > SWS_MAX_REDUCE_CUTOFF) break;

  1222.             min--;

  1223.         }

  1224. 

  1225.         if (min>minFilterSize) minFilterSize= min;

  1226.     }

  1227. 

  1228.     if (flags & SWS_CPU_CAPS_ALTIVEC) {

  1229.         // we can handle the special case 4,

  1230.         // so we don't want to go to the full 8

  1231.         if (minFilterSize < 5)

  1232.             filterAlign = 4;

  1233. 

  1234.         // we really don't want to waste our time

  1235.         // doing useless computation, so fall-back on

  1236.         // the scalar C code for very small filter.

  1237.         // vectorizing is worth it only if you have

  1238.         // decent-sized vector.

  1239.         if (minFilterSize < 3)

  1240.             filterAlign = 1;

  1241.     }

  1242. 

  1243.     if (flags & SWS_CPU_CAPS_MMX) {

  1244.         // special case for unscaled vertical filtering

  1245.         if (minFilterSize == 1 && filterAlign == 2)

  1246.             filterAlign= 1;

  1247.     }

  1248. 

  1249.     assert(minFilterSize > 0);

  1250.     filterSize= (minFilterSize +(filterAlign-1)) & (~(filterAlign-1));

  1251.     assert(filterSize > 0);

  1252.     filter= av_malloc(filterSize*dstW*sizeof(double));

  1253.     if (filterSize >= MAX_FILTER_SIZE)

  1254.         return -1;

  1255.     *outFilterSize= filterSize;

  1256. 

  1257.     if (flags&SWS_PRINT_INFO)

  1258.         av_log(NULL, AV_LOG_VERBOSE, "SwScaler: reducing / aligning filtersize %d -> %d\n", filter2Size, filterSize);

  1259.     /* try to reduce the filter-size (step2 reduce it) */

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

  1261.     {

  1262.         int j;

  1263. 

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

  1265.         {

  1266.             if (j>=filter2Size) filter[i*filterSize + j]= 0.0;

  1267.             else               filter[i*filterSize + j]= filter2[i*filter2Size + j];

  1268.         }

  1269.     }

  1270.     av_free(filter2); filter2=NULL;

  1271. 

  1272. 

  1273.     //FIXME try to align filterpos if possible

  1274. 

  1275.     //fix borders

  1276.     for (i=0; i<dstW; i++)

  1277.     {

  1278.         int j;

  1279.         if ((*filterPos)[i] < 0)

  1280.         {

  1281.             // Move filter coeffs left to compensate for filterPos

  1282.             for (j=1; j<filterSize; j++)

  1283.             {

  1284.                 int left= FFMAX(j + (*filterPos)[i], 0);

  1285.                 filter[i*filterSize + left] += filter[i*filterSize + j];

  1286.                 filter[i*filterSize + j]=0;

  1287.             }

  1288.             (*filterPos)[i]= 0;

  1289.         }

  1290. 

  1291.         if ((*filterPos)[i] + filterSize > srcW)

  1292.         {

  1293.             int shift= (*filterPos)[i] + filterSize - srcW;

  1294.             // Move filter coeffs right to compensate for filterPos

  1295.             for (j=filterSize-2; j>=0; j--)

  1296.             {

  1297.                 int right= FFMIN(j + shift, filterSize-1);

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

  1299.                 filter[i*filterSize +j]=0;

  1300.             }

  1301.             (*filterPos)[i]= srcW - filterSize;

  1302.         }

  1303.     }

  1304. 

  1305.     // Note the +1 is for the MMXscaler which reads over the end

  1306.     /* align at 16 for AltiVec (needed by hScale_altivec_real) */

  1307.     *outFilter= av_mallocz(*outFilterSize*(dstW+1)*sizeof(int16_t));

  1308. 

  1309.     /* Normalize & Store in outFilter */

  1310.     for (i=0; i<dstW; i++)

  1311.     {

  1312.         int j;

  1313.         double error=0;

  1314.         double sum=0;

  1315.         double scale= one;

  1316. 

  1317.         for (j=0; j<filterSize; j++)

  1318.         {

  1319.             sum+= filter[i*filterSize + j];

  1320.         }

  1321.         scale/= sum;

  1322.         for (j=0; j<*outFilterSize; j++)

  1323.         {

  1324.             double v= filter[i*filterSize + j]*scale + error;

  1325.             int intV= floor(v + 0.5);

  1326.             (*outFilter)[i*(*outFilterSize) + j]= intV;

  1327.             error = v - intV;

  1328.         }

  1329.     }

  1330. 

  1331.     (*filterPos)[dstW]= (*filterPos)[dstW-1]; // the MMX scaler will read over the end

  1332.     for (i=0; i<*outFilterSize; i++)

  1333.     {

  1334.         int j= dstW*(*outFilterSize);

  1335.         (*outFilter)[j + i]= (*outFilter)[j + i - (*outFilterSize)];

  1336.     }

  1337. 

  1338.     av_free(filter);

  1339.     return 0;

  1340. }

  1341. 

  1342. #ifdef COMPILE_MMX2

  1343. static void initMMX2HScaler(int dstW, int xInc, uint8_t *funnyCode, int16_t *filter, int32_t *filterPos, int numSplits)

  1344. {

  1345.     uint8_t *fragmentA;

  1346.     long imm8OfPShufW1A;

  1347.     long imm8OfPShufW2A;

  1348.     long fragmentLengthA;

  1349.     uint8_t *fragmentB;

  1350.     long imm8OfPShufW1B;

  1351.     long imm8OfPShufW2B;

  1352.     long fragmentLengthB;

  1353.     int fragmentPos;

  1354. 

  1355.     int xpos, i;

  1356. 

  1357.     // create an optimized horizontal scaling routine

  1358. 

  1359.     //code fragment

  1360. 

  1361.     asm volatile(

  1362.         "jmp                         9f                 \n\t"

  1363.     // Begin

  1364.         "0:                                             \n\t"

  1365.         "movq    (%%"REG_d", %%"REG_a"), %%mm3          \n\t"

  1366.         "movd    (%%"REG_c", %%"REG_S"), %%mm0          \n\t"

  1367.         "movd   1(%%"REG_c", %%"REG_S"), %%mm1          \n\t"

  1368.         "punpcklbw                %%mm7, %%mm1          \n\t"

  1369.         "punpcklbw                %%mm7, %%mm0          \n\t"

  1370.         "pshufw                   $0xFF, %%mm1, %%mm1   \n\t"

  1371.         "1:                                             \n\t"

  1372.         "pshufw                   $0xFF, %%mm0, %%mm0   \n\t"

  1373.         "2:                                             \n\t"

  1374.         "psubw                    %%mm1, %%mm0          \n\t"

  1375.         "movl   8(%%"REG_b", %%"REG_a"), %%esi          \n\t"

  1376.         "pmullw                   %%mm3, %%mm0          \n\t"

  1377.         "psllw                       $7, %%mm1          \n\t"

  1378.         "paddw                    %%mm1, %%mm0          \n\t"

  1379. 

  1380.         "movq                     %%mm0, (%%"REG_D", %%"REG_a") \n\t"

  1381. 

  1382.         "add                         $8, %%"REG_a"      \n\t"

  1383.     // End

  1384.         "9:                                             \n\t"

  1385. //        "int $3                                         \n\t"

  1386.         "lea                 " LOCAL_MANGLE(0b) ", %0   \n\t"

  1387.         "lea                 " LOCAL_MANGLE(1b) ", %1   \n\t"

  1388.         "lea                 " LOCAL_MANGLE(2b) ", %2   \n\t"

  1389.         "dec                         %1                 \n\t"

  1390.         "dec                         %2                 \n\t"

  1391.         "sub                         %0, %1             \n\t"

  1392.         "sub                         %0, %2             \n\t"

  1393.         "lea                 " LOCAL_MANGLE(9b) ", %3   \n\t"

  1394.         "sub                         %0, %3             \n\t"

  1395. 

  1396. 

  1397.         :"=r" (fragmentA), "=r" (imm8OfPShufW1A), "=r" (imm8OfPShufW2A),

  1398.         "=r" (fragmentLengthA)

  1399.     );

  1400. 

  1401.     asm volatile(

  1402.         "jmp                         9f                 \n\t"

  1403.     // Begin

  1404.         "0:                                             \n\t"

  1405.         "movq    (%%"REG_d", %%"REG_a"), %%mm3          \n\t"

  1406.         "movd    (%%"REG_c", %%"REG_S"), %%mm0          \n\t"

  1407.         "punpcklbw                %%mm7, %%mm0          \n\t"

  1408.         "pshufw                   $0xFF, %%mm0, %%mm1   \n\t"

  1409.         "1:                                             \n\t"

  1410.         "pshufw                   $0xFF, %%mm0, %%mm0   \n\t"

  1411.         "2:                                             \n\t"

  1412.         "psubw                    %%mm1, %%mm0          \n\t"

  1413.         "movl   8(%%"REG_b", %%"REG_a"), %%esi          \n\t"

  1414.         "pmullw                   %%mm3, %%mm0          \n\t"

  1415.         "psllw                       $7, %%mm1          \n\t"

  1416.         "paddw                    %%mm1, %%mm0          \n\t"

  1417. 

  1418.         "movq                     %%mm0, (%%"REG_D", %%"REG_a") \n\t"

  1419. 

  1420.         "add                         $8, %%"REG_a"      \n\t"

  1421.     // End

  1422.         "9:                                             \n\t"

  1423. //        "int                       $3                   \n\t"

  1424.         "lea                 " LOCAL_MANGLE(0b) ", %0   \n\t"

  1425.         "lea                 " LOCAL_MANGLE(1b) ", %1   \n\t"

  1426.         "lea                 " LOCAL_MANGLE(2b) ", %2   \n\t"

  1427.         "dec                         %1                 \n\t"

  1428.         "dec                         %2                 \n\t"

  1429.         "sub                         %0, %1             \n\t"

  1430.         "sub                         %0, %2             \n\t"

  1431.         "lea                 " LOCAL_MANGLE(9b) ", %3   \n\t"

  1432.         "sub                         %0, %3             \n\t"

  1433. 

  1434. 

  1435.         :"=r" (fragmentB), "=r" (imm8OfPShufW1B), "=r" (imm8OfPShufW2B),

  1436.         "=r" (fragmentLengthB)

  1437.     );

  1438. 

  1439.     xpos= 0; //lumXInc/2 - 0x8000; // difference between pixel centers

  1440.     fragmentPos=0;

  1441. 

  1442.     for (i=0; i<dstW/numSplits; i++)

  1443.     {

  1444.         int xx=xpos>>16;

  1445. 

  1446.         if ((i&3) == 0)

  1447.         {

  1448.             int a=0;

  1449.             int b=((xpos+xInc)>>16) - xx;

  1450.             int c=((xpos+xInc*2)>>16) - xx;

  1451.             int d=((xpos+xInc*3)>>16) - xx;

  1452. 

  1453.             filter[i  ] = (( xpos         & 0xFFFF) ^ 0xFFFF)>>9;

  1454.             filter[i+1] = (((xpos+xInc  ) & 0xFFFF) ^ 0xFFFF)>>9;

  1455.             filter[i+2] = (((xpos+xInc*2) & 0xFFFF) ^ 0xFFFF)>>9;

  1456.             filter[i+3] = (((xpos+xInc*3) & 0xFFFF) ^ 0xFFFF)>>9;

  1457.             filterPos[i/2]= xx;

  1458. 

  1459.             if (d+1<4)

  1460.             {

  1461.                 int maxShift= 3-(d+1);

  1462.                 int shift=0;

  1463. 

  1464.                 memcpy(funnyCode + fragmentPos, fragmentB, fragmentLengthB);

  1465. 

  1466.                 funnyCode[fragmentPos + imm8OfPShufW1B]=

  1467.                     (a+1) | ((b+1)<<2) | ((c+1)<<4) | ((d+1)<<6);

  1468.                 funnyCode[fragmentPos + imm8OfPShufW2B]=

  1469.                     a | (b<<2) | (c<<4) | (d<<6);

  1470. 

  1471.                 if (i+3>=dstW) shift=maxShift; //avoid overread

  1472.                 else if ((filterPos[i/2]&3) <= maxShift) shift=filterPos[i/2]&3; //Align

  1473. 

  1474.                 if (shift && i>=shift)

  1475.                 {

  1476.                     funnyCode[fragmentPos + imm8OfPShufW1B]+= 0x55*shift;

  1477.                     funnyCode[fragmentPos + imm8OfPShufW2B]+= 0x55*shift;

  1478.                     filterPos[i/2]-=shift;

  1479.                 }

  1480. 

  1481.                 fragmentPos+= fragmentLengthB;

  1482.             }

  1483.             else

  1484.             {

  1485.                 int maxShift= 3-d;

  1486.                 int shift=0;

  1487. 

  1488.                 memcpy(funnyCode + fragmentPos, fragmentA, fragmentLengthA);

  1489. 

  1490.                 funnyCode[fragmentPos + imm8OfPShufW1A]=

  1491.                 funnyCode[fragmentPos + imm8OfPShufW2A]=

  1492.                     a | (b<<2) | (c<<4) | (d<<6);

  1493. 

  1494.                 if (i+4>=dstW) shift=maxShift; //avoid overread

  1495.                 else if ((filterPos[i/2]&3) <= maxShift) shift=filterPos[i/2]&3; //partial align

  1496. 

  1497.                 if (shift && i>=shift)

  1498.                 {

  1499.                     funnyCode[fragmentPos + imm8OfPShufW1A]+= 0x55*shift;

  1500.                     funnyCode[fragmentPos + imm8OfPShufW2A]+= 0x55*shift;

  1501.                     filterPos[i/2]-=shift;

  1502.                 }

  1503. 

  1504.                 fragmentPos+= fragmentLengthA;

  1505.             }

  1506. 

  1507.             funnyCode[fragmentPos]= RET;

  1508.         }

  1509.         xpos+=xInc;

  1510.     }

  1511.     filterPos[i/2]= xpos>>16; // needed to jump to the next part

  1512. }

  1513. #endif /* COMPILE_MMX2 */

  1514. 

  1515. static void globalInit(void){

  1516.     // generating tables:

  1517.     int i;

  1518.     for (i=0; i<768; i++){

  1519.         int c= av_clip_uint8(i-256);

  1520.         clip_table[i]=c;

  1521.     }

  1522. }

  1523. 

  1524. static SwsFunc getSwsFunc(int flags){

  1525. 

  1526. #if defined(RUNTIME_CPUDETECT) && defined (CONFIG_GPL)

  1527. #if defined(ARCH_X86)

  1528.     // ordered per speed fastest first

  1529.     if (flags & SWS_CPU_CAPS_MMX2)

  1530.         return swScale_MMX2;

  1531.     else if (flags & SWS_CPU_CAPS_3DNOW)

  1532.         return swScale_3DNow;

  1533.     else if (flags & SWS_CPU_CAPS_MMX)

  1534.         return swScale_MMX;

  1535.     else

  1536.         return swScale_C;

  1537. 

  1538. #else

  1539. #ifdef ARCH_POWERPC

  1540.     if (flags & SWS_CPU_CAPS_ALTIVEC)

  1541.         return swScale_altivec;

  1542.     else

  1543.         return swScale_C;

  1544. #endif

  1545.     return swScale_C;

  1546. #endif /* defined(ARCH_X86) */

  1547. #else //RUNTIME_CPUDETECT

  1548. #ifdef HAVE_MMX2

  1549.     return swScale_MMX2;

  1550. #elif defined (HAVE_3DNOW)

  1551.     return swScale_3DNow;

  1552. #elif defined (HAVE_MMX)

  1553.     return swScale_MMX;

  1554. #elif defined (HAVE_ALTIVEC)

  1555.     return swScale_altivec;

  1556. #else

  1557.     return swScale_C;

  1558. #endif

  1559. #endif //!RUNTIME_CPUDETECT

  1560. }

  1561. 

  1562. static int PlanarToNV12Wrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1563.                                int srcSliceH, uint8_t* dstParam[], int dstStride[]){

  1564.     uint8_t *dst=dstParam[0] + dstStride[0]*srcSliceY;

  1565.     /* Copy Y plane */

  1566.     if (dstStride[0]==srcStride[0] && srcStride[0] > 0)

  1567.         memcpy(dst, src[0], srcSliceH*dstStride[0]);

  1568.     else

  1569.     {

  1570.         int i;

  1571.         uint8_t *srcPtr= src[0];

  1572.         uint8_t *dstPtr= dst;

  1573.         for (i=0; i<srcSliceH; i++)

  1574.         {

  1575.             memcpy(dstPtr, srcPtr, c->srcW);

  1576.             srcPtr+= srcStride[0];

  1577.             dstPtr+= dstStride[0];

  1578.         }

  1579.     }

  1580.     dst = dstParam[1] + dstStride[1]*srcSliceY/2;

  1581.     if (c->dstFormat == PIX_FMT_NV12)

  1582.         interleaveBytes(src[1], src[2], dst, c->srcW/2, srcSliceH/2, srcStride[1], srcStride[2], dstStride[0]);

  1583.     else

  1584.         interleaveBytes(src[2], src[1], dst, c->srcW/2, srcSliceH/2, srcStride[2], srcStride[1], dstStride[0]);

  1585. 

  1586.     return srcSliceH;

  1587. }

  1588. 

  1589. static int PlanarToYuy2Wrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1590.                                int srcSliceH, uint8_t* dstParam[], int dstStride[]){

  1591.     uint8_t *dst=dstParam[0] + dstStride[0]*srcSliceY;

  1592. 

  1593.     yv12toyuy2(src[0], src[1], src[2], dst, c->srcW, srcSliceH, srcStride[0], srcStride[1], dstStride[0]);

  1594. 

  1595.     return srcSliceH;

  1596. }

  1597. 

  1598. static int PlanarToUyvyWrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1599.                                int srcSliceH, uint8_t* dstParam[], int dstStride[]){

  1600.     uint8_t *dst=dstParam[0] + dstStride[0]*srcSliceY;

  1601. 

  1602.     yv12touyvy(src[0], src[1], src[2], dst, c->srcW, srcSliceH, srcStride[0], srcStride[1], dstStride[0]);

  1603. 

  1604.     return srcSliceH;

  1605. }

  1606. 

  1607. /* {RGB,BGR}{15,16,24,32} -> {RGB,BGR}{15,16,24,32} */

  1608. static int rgb2rgbWrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1609.                           int srcSliceH, uint8_t* dst[], int dstStride[]){

  1610.     const int srcFormat= c->srcFormat;

  1611.     const int dstFormat= c->dstFormat;

  1612.     const int srcBpp= (fmt_depth(srcFormat) + 7) >> 3;

  1613.     const int dstBpp= (fmt_depth(dstFormat) + 7) >> 3;

  1614.     const int srcId= fmt_depth(srcFormat) >> 2; /* 1:0, 4:1, 8:2, 15:3, 16:4, 24:6, 32:8 */

  1615.     const int dstId= fmt_depth(dstFormat) >> 2;

  1616.     void (*conv)(const uint8_t *src, uint8_t *dst, long src_size)=NULL;

  1617. 

  1618.     /* BGR -> BGR */

  1619.     if (  (isBGR(srcFormat) && isBGR(dstFormat))

  1620.        || (isRGB(srcFormat) && isRGB(dstFormat))){

  1621.         switch(srcId | (dstId<<4)){

  1622.         case 0x34: conv= rgb16to15; break;

  1623.         case 0x36: conv= rgb24to15; break;

  1624.         case 0x38: conv= rgb32to15; break;

  1625.         case 0x43: conv= rgb15to16; break;

  1626.         case 0x46: conv= rgb24to16; break;

  1627.         case 0x48: conv= rgb32to16; break;

  1628.         case 0x63: conv= rgb15to24; break;

  1629.         case 0x64: conv= rgb16to24; break;

  1630.         case 0x68: conv= rgb32to24; break;

  1631.         case 0x83: conv= rgb15to32; break;

  1632.         case 0x84: conv= rgb16to32; break;

  1633.         case 0x86: conv= rgb24to32; break;

  1634.         default: av_log(c, AV_LOG_ERROR, "internal error %s -> %s converter\n",

  1635.                         sws_format_name(srcFormat), sws_format_name(dstFormat)); break;

  1636.         }

  1637.     }else if (  (isBGR(srcFormat) && isRGB(dstFormat))

  1638.              || (isRGB(srcFormat) && isBGR(dstFormat))){

  1639.         switch(srcId | (dstId<<4)){

  1640.         case 0x33: conv= rgb15tobgr15; break;

  1641.         case 0x34: conv= rgb16tobgr15; break;

  1642.         case 0x36: conv= rgb24tobgr15; break;

  1643.         case 0x38: conv= rgb32tobgr15; break;

  1644.         case 0x43: conv= rgb15tobgr16; break;

  1645.         case 0x44: conv= rgb16tobgr16; break;

  1646.         case 0x46: conv= rgb24tobgr16; break;

  1647.         case 0x48: conv= rgb32tobgr16; break;

  1648.         case 0x63: conv= rgb15tobgr24; break;

  1649.         case 0x64: conv= rgb16tobgr24; break;

  1650.         case 0x66: conv= rgb24tobgr24; break;

  1651.         case 0x68: conv= rgb32tobgr24; break;

  1652.         case 0x83: conv= rgb15tobgr32; break;

  1653.         case 0x84: conv= rgb16tobgr32; break;

  1654.         case 0x86: conv= rgb24tobgr32; break;

  1655.         case 0x88: conv= rgb32tobgr32; break;

  1656.         default: av_log(c, AV_LOG_ERROR, "internal error %s -> %s converter\n",

  1657.                         sws_format_name(srcFormat), sws_format_name(dstFormat)); break;

  1658.         }

  1659.     }else{

  1660.         av_log(c, AV_LOG_ERROR, "internal error %s -> %s converter\n",

  1661.                sws_format_name(srcFormat), sws_format_name(dstFormat));

  1662.     }

  1663. 

  1664.     if(conv)

  1665.     {

  1666.         if (dstStride[0]*srcBpp == srcStride[0]*dstBpp && srcStride[0] > 0)

  1667.             conv(src[0], dst[0] + dstStride[0]*srcSliceY, srcSliceH*srcStride[0]);

  1668.         else

  1669.         {

  1670.             int i;

  1671.             uint8_t *srcPtr= src[0];

  1672.             uint8_t *dstPtr= dst[0] + dstStride[0]*srcSliceY;

  1673. 

  1674.             for (i=0; i<srcSliceH; i++)

  1675.             {

  1676.                 conv(srcPtr, dstPtr, c->srcW*srcBpp);

  1677.                 srcPtr+= srcStride[0];

  1678.                 dstPtr+= dstStride[0];

  1679.             }

  1680.         }

  1681.     }

  1682.     return srcSliceH;

  1683. }

  1684. 

  1685. static int bgr24toyv12Wrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1686.                               int srcSliceH, uint8_t* dst[], int dstStride[]){

  1687. 

  1688.     rgb24toyv12(

  1689.         src[0],

  1690.         dst[0]+ srcSliceY    *dstStride[0],

  1691.         dst[1]+(srcSliceY>>1)*dstStride[1],

  1692.         dst[2]+(srcSliceY>>1)*dstStride[2],

  1693.         c->srcW, srcSliceH,

  1694.         dstStride[0], dstStride[1], srcStride[0]);

  1695.     return srcSliceH;

  1696. }

  1697. 

  1698. static int yvu9toyv12Wrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1699.                              int srcSliceH, uint8_t* dst[], int dstStride[]){

  1700.     int i;

  1701. 

  1702.     /* copy Y */

  1703.     if (srcStride[0]==dstStride[0] && srcStride[0] > 0)

  1704.         memcpy(dst[0]+ srcSliceY*dstStride[0], src[0], srcStride[0]*srcSliceH);

  1705.     else{

  1706.         uint8_t *srcPtr= src[0];

  1707.         uint8_t *dstPtr= dst[0] + dstStride[0]*srcSliceY;

  1708. 

  1709.         for (i=0; i<srcSliceH; i++)

  1710.         {

  1711.             memcpy(dstPtr, srcPtr, c->srcW);

  1712.             srcPtr+= srcStride[0];

  1713.             dstPtr+= dstStride[0];

  1714.         }

  1715.     }

  1716. 

  1717.     if (c->dstFormat==PIX_FMT_YUV420P){

  1718.         planar2x(src[1], dst[1], c->chrSrcW, c->chrSrcH, srcStride[1], dstStride[1]);

  1719.         planar2x(src[2], dst[2], c->chrSrcW, c->chrSrcH, srcStride[2], dstStride[2]);

  1720.     }else{

  1721.         planar2x(src[1], dst[2], c->chrSrcW, c->chrSrcH, srcStride[1], dstStride[2]);

  1722.         planar2x(src[2], dst[1], c->chrSrcW, c->chrSrcH, srcStride[2], dstStride[1]);

  1723.     }

  1724.     return srcSliceH;

  1725. }

  1726. 

  1727. /* unscaled copy like stuff (assumes nearly identical formats) */

  1728. static int packedCopy(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1729.                       int srcSliceH, uint8_t* dst[], int dstStride[])

  1730. {

  1731.     if (dstStride[0]==srcStride[0] && srcStride[0] > 0)

  1732.         memcpy(dst[0] + dstStride[0]*srcSliceY, src[0], srcSliceH*dstStride[0]);

  1733.     else

  1734.     {

  1735.         int i;

  1736.         uint8_t *srcPtr= src[0];

  1737.         uint8_t *dstPtr= dst[0] + dstStride[0]*srcSliceY;

  1738.         int length=0;

  1739. 

  1740.         /* universal length finder */

  1741.         while(length+c->srcW <= FFABS(dstStride[0])

  1742.            && length+c->srcW <= FFABS(srcStride[0])) length+= c->srcW;

  1743.         assert(length!=0);

  1744. 

  1745.         for (i=0; i<srcSliceH; i++)

  1746.         {

  1747.             memcpy(dstPtr, srcPtr, length);

  1748.             srcPtr+= srcStride[0];

  1749.             dstPtr+= dstStride[0];

  1750.         }

  1751.     }

  1752.     return srcSliceH;

  1753. }

  1754. 

  1755. static int planarCopy(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1756.                       int srcSliceH, uint8_t* dst[], int dstStride[])

  1757. {

  1758.     int plane;

  1759.     for (plane=0; plane<3; plane++)

  1760.     {

  1761.         int length= plane==0 ? c->srcW  : -((-c->srcW  )>>c->chrDstHSubSample);

  1762.         int y=      plane==0 ? srcSliceY: -((-srcSliceY)>>c->chrDstVSubSample);

  1763.         int height= plane==0 ? srcSliceH: -((-srcSliceH)>>c->chrDstVSubSample);

  1764. 

  1765.         if ((isGray(c->srcFormat) || isGray(c->dstFormat)) && plane>0)

  1766.         {

  1767.             if (!isGray(c->dstFormat))

  1768.                 memset(dst[plane], 128, dstStride[plane]*height);

  1769.         }

  1770.         else

  1771.         {

  1772.             if (dstStride[plane]==srcStride[plane] && srcStride[plane] > 0)

  1773.                 memcpy(dst[plane] + dstStride[plane]*y, src[plane], height*dstStride[plane]);

  1774.             else

  1775.             {

  1776.                 int i;

  1777.                 uint8_t *srcPtr= src[plane];

  1778.                 uint8_t *dstPtr= dst[plane] + dstStride[plane]*y;

  1779.                 for (i=0; i<height; i++)

  1780.                 {

  1781.                     memcpy(dstPtr, srcPtr, length);

  1782.                     srcPtr+= srcStride[plane];

  1783.                     dstPtr+= dstStride[plane];

  1784.                 }

  1785.             }

  1786.         }

  1787.     }

  1788.     return srcSliceH;

  1789. }

  1790. 

  1791. static int gray16togray(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1792.                         int srcSliceH, uint8_t* dst[], int dstStride[]){

  1793. 

  1794.     int length= c->srcW;

  1795.     int y=      srcSliceY;

  1796.     int height= srcSliceH;

  1797.     int i, j;

  1798.     uint8_t *srcPtr= src[0];

  1799.     uint8_t *dstPtr= dst[0] + dstStride[0]*y;

  1800. 

  1801.     if (!isGray(c->dstFormat)){

  1802.         int height= -((-srcSliceH)>>c->chrDstVSubSample);

  1803.         memset(dst[1], 128, dstStride[1]*height);

  1804.         memset(dst[2], 128, dstStride[2]*height);

  1805.     }

  1806.     if (c->srcFormat == PIX_FMT_GRAY16LE) srcPtr++;

  1807.     for (i=0; i<height; i++)

  1808.     {

  1809.         for (j=0; j<length; j++) dstPtr[j] = srcPtr[j<<1];

  1810.         srcPtr+= srcStride[0];

  1811.         dstPtr+= dstStride[0];

  1812.     }

  1813.     return srcSliceH;

  1814. }

  1815. 

  1816. static int graytogray16(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1817.                         int srcSliceH, uint8_t* dst[], int dstStride[]){

  1818. 

  1819.     int length= c->srcW;

  1820.     int y=      srcSliceY;

  1821.     int height= srcSliceH;

  1822.     int i, j;

  1823.     uint8_t *srcPtr= src[0];

  1824.     uint8_t *dstPtr= dst[0] + dstStride[0]*y;

  1825.     for (i=0; i<height; i++)

  1826.     {

  1827.         for (j=0; j<length; j++)

  1828.         {

  1829.             dstPtr[j<<1] = srcPtr[j];

  1830.             dstPtr[(j<<1)+1] = srcPtr[j];

  1831.         }

  1832.         srcPtr+= srcStride[0];

  1833.         dstPtr+= dstStride[0];

  1834.     }

  1835.     return srcSliceH;

  1836. }

  1837. 

  1838. static int gray16swap(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1839.                       int srcSliceH, uint8_t* dst[], int dstStride[]){

  1840. 

  1841.     int length= c->srcW;

  1842.     int y=      srcSliceY;

  1843.     int height= srcSliceH;

  1844.     int i, j;

  1845.     uint16_t *srcPtr= (uint16_t*)src[0];

  1846.     uint16_t *dstPtr= (uint16_t*)(dst[0] + dstStride[0]*y/2);

  1847.     for (i=0; i<height; i++)

  1848.     {

  1849.         for (j=0; j<length; j++) dstPtr[j] = bswap_16(srcPtr[j]);

  1850.         srcPtr+= srcStride[0]/2;

  1851.         dstPtr+= dstStride[0]/2;

  1852.     }

  1853.     return srcSliceH;

  1854. }

  1855. 

  1856. 

  1857. static void getSubSampleFactors(int *h, int *v, int format){

  1858.     switch(format){

  1859.     case PIX_FMT_UYVY422:

  1860.     case PIX_FMT_YUYV422:

  1861.         *h=1;

  1862.         *v=0;

  1863.         break;

  1864.     case PIX_FMT_YUV420P:

  1865.     case PIX_FMT_YUVA420P:

  1866.     case PIX_FMT_GRAY16BE:

  1867.     case PIX_FMT_GRAY16LE:

  1868.     case PIX_FMT_GRAY8: //FIXME remove after different subsamplings are fully implemented

  1869.     case PIX_FMT_NV12:

  1870.     case PIX_FMT_NV21:

  1871.         *h=1;

  1872.         *v=1;

  1873.         break;

  1874.     case PIX_FMT_YUV440P:

  1875.         *h=0;

  1876.         *v=1;

  1877.         break;

  1878.     case PIX_FMT_YUV410P:

  1879.         *h=2;

  1880.         *v=2;

  1881.         break;

  1882.     case PIX_FMT_YUV444P:

  1883.         *h=0;

  1884.         *v=0;

  1885.         break;

  1886.     case PIX_FMT_YUV422P:

  1887.         *h=1;

  1888.         *v=0;

  1889.         break;

  1890.     case PIX_FMT_YUV411P:

  1891.         *h=2;

  1892.         *v=0;

  1893.         break;

  1894.     default:

  1895.         *h=0;

  1896.         *v=0;

  1897.         break;

  1898.     }

  1899. }

  1900. 

  1901. static uint16_t roundToInt16(int64_t f){

  1902.     int r= (f + (1<<15))>>16;

  1903.          if (r<-0x7FFF) return 0x8000;

  1904.     else if (r> 0x7FFF) return 0x7FFF;

  1905.     else                return r;

  1906. }

  1907. 

  1908. /**

  1909.  * @param inv_table the yuv2rgb coeffs, normally Inverse_Table_6_9[x]

  1910.  * @param fullRange if 1 then the luma range is 0..255 if 0 it is 16..235

  1911.  * @return -1 if not supported

  1912.  */

  1913. int sws_setColorspaceDetails(SwsContext *c, const int inv_table[4], int srcRange, const int table[4], int dstRange, int brightness, int contrast, int saturation){

  1914.     int64_t crv =  inv_table[0];

  1915.     int64_t cbu =  inv_table[1];

  1916.     int64_t cgu = -inv_table[2];

  1917.     int64_t cgv = -inv_table[3];

  1918.     int64_t cy  = 1<<16;

  1919.     int64_t oy  = 0;

  1920. 

  1921.     if (isYUV(c->dstFormat) || isGray(c->dstFormat)) return -1;

  1922.     memcpy(c->srcColorspaceTable, inv_table, sizeof(int)*4);

  1923.     memcpy(c->dstColorspaceTable,     table, sizeof(int)*4);

  1924. 

  1925.     c->brightness= brightness;

  1926.     c->contrast  = contrast;

  1927.     c->saturation= saturation;

  1928.     c->srcRange  = srcRange;

  1929.     c->dstRange  = dstRange;

  1930. 

  1931.     c->uOffset=   0x0400040004000400LL;

  1932.     c->vOffset=   0x0400040004000400LL;

  1933. 

  1934.     if (!srcRange){

  1935.         cy= (cy*255) / 219;

  1936.         oy= 16<<16;

  1937.     }else{

  1938.         crv= (crv*224) / 255;

  1939.         cbu= (cbu*224) / 255;

  1940.         cgu= (cgu*224) / 255;

  1941.         cgv= (cgv*224) / 255;

  1942.     }

  1943. 

  1944.     cy = (cy *contrast             )>>16;

  1945.     crv= (crv*contrast * saturation)>>32;

  1946.     cbu= (cbu*contrast * saturation)>>32;

  1947.     cgu= (cgu*contrast * saturation)>>32;

  1948.     cgv= (cgv*contrast * saturation)>>32;

  1949. 

  1950.     oy -= 256*brightness;

  1951. 

  1952.     c->yCoeff=    roundToInt16(cy *8192) * 0x0001000100010001ULL;

  1953.     c->vrCoeff=   roundToInt16(crv*8192) * 0x0001000100010001ULL;

  1954.     c->ubCoeff=   roundToInt16(cbu*8192) * 0x0001000100010001ULL;

  1955.     c->vgCoeff=   roundToInt16(cgv*8192) * 0x0001000100010001ULL;

  1956.     c->ugCoeff=   roundToInt16(cgu*8192) * 0x0001000100010001ULL;

  1957.     c->yOffset=   roundToInt16(oy *   8) * 0x0001000100010001ULL;

  1958. 

  1959.     yuv2rgb_c_init_tables(c, inv_table, srcRange, brightness, contrast, saturation);

  1960.     //FIXME factorize

  1961. 

  1962. #ifdef COMPILE_ALTIVEC

  1963.     if (c->flags & SWS_CPU_CAPS_ALTIVEC)

  1964.         yuv2rgb_altivec_init_tables (c, inv_table, brightness, contrast, saturation);

  1965. #endif

  1966.     return 0;

  1967. }

  1968. 

  1969. /**

  1970.  * @return -1 if not supported

  1971.  */

  1972. int sws_getColorspaceDetails(SwsContext *c, int **inv_table, int *srcRange, int **table, int *dstRange, int *brightness, int *contrast, int *saturation){

  1973.     if (isYUV(c->dstFormat) || isGray(c->dstFormat)) return -1;

  1974. 

  1975.     *inv_table = c->srcColorspaceTable;

  1976.     *table     = c->dstColorspaceTable;

  1977.     *srcRange  = c->srcRange;

  1978.     *dstRange  = c->dstRange;

  1979.     *brightness= c->brightness;

  1980.     *contrast  = c->contrast;

  1981.     *saturation= c->saturation;

  1982. 

  1983.     return 0;

  1984. }

  1985. 

  1986. static int handle_jpeg(int *format)

  1987. {

  1988.     switch (*format) {

  1989.         case PIX_FMT_YUVJ420P:

  1990.             *format = PIX_FMT_YUV420P;

  1991.             return 1;

  1992.         case PIX_FMT_YUVJ422P:

  1993.             *format = PIX_FMT_YUV422P;

  1994.             return 1;

  1995.         case PIX_FMT_YUVJ444P:

  1996.             *format = PIX_FMT_YUV444P;

  1997.             return 1;

  1998.         case PIX_FMT_YUVJ440P:

  1999.             *format = PIX_FMT_YUV440P;

  2000.             return 1;

  2001.         default:

  2002.             return 0;

  2003.     }

  2004. }

  2005. 

  2006. SwsContext *sws_getContext(int srcW, int srcH, int srcFormat, int dstW, int dstH, int dstFormat, int flags,

  2007.                            SwsFilter *srcFilter, SwsFilter *dstFilter, double *param){

  2008. 

  2009.     SwsContext *c;

  2010.     int i;

  2011.     int usesVFilter, usesHFilter;

  2012.     int unscaled, needsDither;

  2013.     int srcRange, dstRange;

  2014.     SwsFilter dummyFilter= {NULL, NULL, NULL, NULL};

  2015. #if defined(ARCH_X86)

  2016.     if (flags & SWS_CPU_CAPS_MMX)

  2017.         asm volatile("emms\n\t"::: "memory");

  2018. #endif

  2019. 

  2020. #if !defined(RUNTIME_CPUDETECT) || !defined (CONFIG_GPL) //ensure that the flags match the compiled variant if cpudetect is off

  2021.     flags &= ~(SWS_CPU_CAPS_MMX|SWS_CPU_CAPS_MMX2|SWS_CPU_CAPS_3DNOW|SWS_CPU_CAPS_ALTIVEC|SWS_CPU_CAPS_BFIN);

  2022. #ifdef HAVE_MMX2

  2023.     flags |= SWS_CPU_CAPS_MMX|SWS_CPU_CAPS_MMX2;

  2024. #elif defined (HAVE_3DNOW)

  2025.     flags |= SWS_CPU_CAPS_MMX|SWS_CPU_CAPS_3DNOW;

  2026. #elif defined (HAVE_MMX)

  2027.     flags |= SWS_CPU_CAPS_MMX;

  2028. #elif defined (HAVE_ALTIVEC)

  2029.     flags |= SWS_CPU_CAPS_ALTIVEC;

  2030. #elif defined (ARCH_BFIN)

  2031.     flags |= SWS_CPU_CAPS_BFIN;

  2032. #endif

  2033. #endif /* RUNTIME_CPUDETECT */

  2034.     if (clip_table[512] != 255) globalInit();

  2035.     if (!rgb15to16) sws_rgb2rgb_init(flags);

  2036. 

  2037.     unscaled = (srcW == dstW && srcH == dstH);

  2038.     needsDither= (isBGR(dstFormat) || isRGB(dstFormat))

  2039.         && (fmt_depth(dstFormat))<24

  2040.         && ((fmt_depth(dstFormat))<(fmt_depth(srcFormat)) || (!(isRGB(srcFormat) || isBGR(srcFormat))));

  2041. 

  2042.     srcRange = handle_jpeg(&srcFormat);

  2043.     dstRange = handle_jpeg(&dstFormat);

  2044. 

  2045.     if (!isSupportedIn(srcFormat))

  2046.     {

  2047.         av_log(NULL, AV_LOG_ERROR, "swScaler: %s is not supported as input pixel format\n", sws_format_name(srcFormat));

  2048.         return NULL;

  2049.     }

  2050.     if (!isSupportedOut(dstFormat))

  2051.     {

  2052.         av_log(NULL, AV_LOG_ERROR, "swScaler: %s is not supported as output pixel format\n", sws_format_name(dstFormat));

  2053.         return NULL;

  2054.     }

  2055. 

  2056.     /* sanity check */

  2057.     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

  2058.     {

  2059.         av_log(NULL, AV_LOG_ERROR, "swScaler: %dx%d -> %dx%d is invalid scaling dimension\n",

  2060.                srcW, srcH, dstW, dstH);

  2061.         return NULL;

  2062.     }

  2063.     if(srcW > VOFW || dstW > VOFW){

  2064.         av_log(NULL, AV_LOG_ERROR, "swScaler: Compile time max width is "AV_STRINGIFY(VOFW)" change VOF/VOFW and recompile\n");

  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 && dstFilter->lumV->length>1) usesVFilter=1;

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

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

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

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

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

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

  2093.     if (srcFilter->chrH && 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.             if (isPacked(c->srcFormat))

  2206.                 c->swScale= packedCopy;

  2207.             else /* Planar YUV or gray */

  2208.                 c->swScale= planarCopy;

  2209.         }

  2210. 

  2211.         /* gray16{le,be} conversions */

  2212.         if (isGray16(srcFormat) && (isPlanarYUV(dstFormat) || (dstFormat == PIX_FMT_GRAY8)))

  2213.         {

  2214.             c->swScale= gray16togray;

  2215.         }

  2216.         if ((isPlanarYUV(srcFormat) || (srcFormat == PIX_FMT_GRAY8)) && isGray16(dstFormat))

  2217.         {

  2218.             c->swScale= graytogray16;

  2219.         }

  2220.         if (srcFormat != dstFormat && isGray16(srcFormat) && isGray16(dstFormat))

  2221.         {

  2222.             c->swScale= gray16swap;

  2223.         }

  2224. 

  2225. #ifdef ARCH_BFIN

  2226.         if (flags & SWS_CPU_CAPS_BFIN)

  2227.             ff_bfin_get_unscaled_swscale (c);

  2228. #endif

  2229. 

  2230.         if (c->swScale){

  2231.             if (flags&SWS_PRINT_INFO)

  2232.                 av_log(c, AV_LOG_INFO, "using unscaled %s -> %s special converter\n",

  2233.                                 sws_format_name(srcFormat), sws_format_name(dstFormat));

  2234.             return c;

  2235.         }

  2236.     }

  2237. 

  2238.     if (flags & SWS_CPU_CAPS_MMX2)

  2239.     {

  2240.         c->canMMX2BeUsed= (dstW >=srcW && (dstW&31)==0 && (srcW&15)==0) ? 1 : 0;

  2241.         if (!c->canMMX2BeUsed && dstW >=srcW && (srcW&15)==0 && (flags&SWS_FAST_BILINEAR))

  2242.         {

  2243.             if (flags&SWS_PRINT_INFO)

  2244.                 av_log(c, AV_LOG_INFO, "output Width is not a multiple of 32 -> no MMX2 scaler\n");

  2245.         }

  2246.         if (usesHFilter) c->canMMX2BeUsed=0;

  2247.     }

  2248.     else

  2249.         c->canMMX2BeUsed=0;

  2250. 

  2251.     c->chrXInc= ((c->chrSrcW<<16) + (c->chrDstW>>1))/c->chrDstW;

  2252.     c->chrYInc= ((c->chrSrcH<<16) + (c->chrDstH>>1))/c->chrDstH;

  2253. 

  2254.     // match pixel 0 of the src to pixel 0 of dst and match pixel n-2 of src to pixel n-2 of dst

  2255.     // but only for the FAST_BILINEAR mode otherwise do correct scaling

  2256.     // n-2 is the last chrominance sample available

  2257.     // this is not perfect, but no one should notice the difference, the more correct variant

  2258.     // would be like the vertical one, but that would require some special code for the

  2259.     // first and last pixel

  2260.     if (flags&SWS_FAST_BILINEAR)

  2261.     {

  2262.         if (c->canMMX2BeUsed)

  2263.         {

  2264.             c->lumXInc+= 20;

  2265.             c->chrXInc+= 20;

  2266.         }

  2267.         //we don't use the x86asm scaler if mmx is available

  2268.         else if (flags & SWS_CPU_CAPS_MMX)

  2269.         {

  2270.             c->lumXInc = ((srcW-2)<<16)/(dstW-2) - 20;

  2271.             c->chrXInc = ((c->chrSrcW-2)<<16)/(c->chrDstW-2) - 20;

  2272.         }

  2273.     }

  2274. 

  2275.     /* precalculate horizontal scaler filter coefficients */

  2276.     {

  2277.         const int filterAlign=

  2278.             (flags & SWS_CPU_CAPS_MMX) ? 4 :

  2279.             (flags & SWS_CPU_CAPS_ALTIVEC) ? 8 :

  2280.             1;

  2281. 

  2282.         initFilter(&c->hLumFilter, &c->hLumFilterPos, &c->hLumFilterSize, c->lumXInc,

  2283.                    srcW      ,       dstW, filterAlign, 1<<14,

  2284.                    (flags&SWS_BICUBLIN) ? (flags|SWS_BICUBIC)  : flags,

  2285.                    srcFilter->lumH, dstFilter->lumH, c->param);

  2286.         initFilter(&c->hChrFilter, &c->hChrFilterPos, &c->hChrFilterSize, c->chrXInc,

  2287.                    c->chrSrcW, c->chrDstW, filterAlign, 1<<14,

  2288.                    (flags&SWS_BICUBLIN) ? (flags|SWS_BILINEAR) : flags,

  2289.                    srcFilter->chrH, dstFilter->chrH, c->param);

  2290. 

  2291. #define MAX_FUNNY_CODE_SIZE 10000

  2292. #if defined(COMPILE_MMX2)

  2293. // can't downscale !!!

  2294.         if (c->canMMX2BeUsed && (flags & SWS_FAST_BILINEAR))

  2295.         {

  2296. #ifdef MAP_ANONYMOUS

  2297.             c->funnyYCode = (uint8_t*)mmap(NULL, MAX_FUNNY_CODE_SIZE, PROT_EXEC | PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, 0, 0);

  2298.             c->funnyUVCode = (uint8_t*)mmap(NULL, MAX_FUNNY_CODE_SIZE, PROT_EXEC | PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, 0, 0);

  2299. #else

  2300.             c->funnyYCode = av_malloc(MAX_FUNNY_CODE_SIZE);

  2301.             c->funnyUVCode = av_malloc(MAX_FUNNY_CODE_SIZE);

  2302. #endif

  2303. 

  2304.             c->lumMmx2Filter   = av_malloc((dstW        /8+8)*sizeof(int16_t));

  2305.             c->chrMmx2Filter   = av_malloc((c->chrDstW  /4+8)*sizeof(int16_t));

  2306.             c->lumMmx2FilterPos= av_malloc((dstW      /2/8+8)*sizeof(int32_t));

  2307.             c->chrMmx2FilterPos= av_malloc((c->chrDstW/2/4+8)*sizeof(int32_t));

  2308. 

  2309.             initMMX2HScaler(      dstW, c->lumXInc, c->funnyYCode , c->lumMmx2Filter, c->lumMmx2FilterPos, 8);

  2310.             initMMX2HScaler(c->chrDstW, c->chrXInc, c->funnyUVCode, c->chrMmx2Filter, c->chrMmx2FilterPos, 4);

  2311.         }

  2312. #endif /* defined(COMPILE_MMX2) */

  2313.     } // Init Horizontal stuff

  2314. 

  2315. 

  2316. 

  2317.     /* precalculate vertical scaler filter coefficients */

  2318.     {

  2319.         const int filterAlign=

  2320.             (flags & SWS_CPU_CAPS_MMX) && (flags & SWS_ACCURATE_RND) ? 2 :

  2321.             (flags & SWS_CPU_CAPS_ALTIVEC) ? 8 :

  2322.             1;

  2323. 

  2324.         initFilter(&c->vLumFilter, &c->vLumFilterPos, &c->vLumFilterSize, c->lumYInc,

  2325.                    srcH      ,        dstH, filterAlign, (1<<12)-4,

  2326.                    (flags&SWS_BICUBLIN) ? (flags|SWS_BICUBIC)  : flags,

  2327.                    srcFilter->lumV, dstFilter->lumV, c->param);

  2328.         initFilter(&c->vChrFilter, &c->vChrFilterPos, &c->vChrFilterSize, c->chrYInc,

  2329.                    c->chrSrcH, c->chrDstH, filterAlign, (1<<12)-4,

  2330.                    (flags&SWS_BICUBLIN) ? (flags|SWS_BILINEAR) : flags,

  2331.                    srcFilter->chrV, dstFilter->chrV, c->param);

  2332. 

  2333. #ifdef HAVE_ALTIVEC

  2334.         c->vYCoeffsBank = av_malloc(sizeof (vector signed short)*c->vLumFilterSize*c->dstH);

  2335.         c->vCCoeffsBank = av_malloc(sizeof (vector signed short)*c->vChrFilterSize*c->chrDstH);

  2336. 

  2337.         for (i=0;i<c->vLumFilterSize*c->dstH;i++) {

  2338.             int j;

  2339.             short *p = (short *)&c->vYCoeffsBank[i];

  2340.             for (j=0;j<8;j++)

  2341.                 p[j] = c->vLumFilter[i];

  2342.         }

  2343. 

  2344.         for (i=0;i<c->vChrFilterSize*c->chrDstH;i++) {

  2345.             int j;

  2346.             short *p = (short *)&c->vCCoeffsBank[i];

  2347.             for (j=0;j<8;j++)

  2348.                 p[j] = c->vChrFilter[i];

  2349.         }

  2350. #endif

  2351.     }

  2352. 

  2353.     // Calculate Buffer Sizes so that they won't run out while handling these damn slices

  2354.     c->vLumBufSize= c->vLumFilterSize;

  2355.     c->vChrBufSize= c->vChrFilterSize;

  2356.     for (i=0; i<dstH; i++)

  2357.     {

  2358.         int chrI= i*c->chrDstH / dstH;

  2359.         int nextSlice= FFMAX(c->vLumFilterPos[i   ] + c->vLumFilterSize - 1,

  2360.                            ((c->vChrFilterPos[chrI] + c->vChrFilterSize - 1)<<c->chrSrcVSubSample));

  2361. 

  2362.         nextSlice>>= c->chrSrcVSubSample;

  2363.         nextSlice<<= c->chrSrcVSubSample;

  2364.         if (c->vLumFilterPos[i   ] + c->vLumBufSize < nextSlice)

  2365.             c->vLumBufSize= nextSlice - c->vLumFilterPos[i];

  2366.         if (c->vChrFilterPos[chrI] + c->vChrBufSize < (nextSlice>>c->chrSrcVSubSample))

  2367.             c->vChrBufSize= (nextSlice>>c->chrSrcVSubSample) - c->vChrFilterPos[chrI];

  2368.     }

  2369. 

  2370.     // allocate pixbufs (we use dynamic allocation because otherwise we would need to

  2371.     c->lumPixBuf= av_malloc(c->vLumBufSize*2*sizeof(int16_t*));

  2372.     c->chrPixBuf= av_malloc(c->vChrBufSize*2*sizeof(int16_t*));

  2373.     //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)

  2374.     /* align at 16 bytes for AltiVec */

  2375.     for (i=0; i<c->vLumBufSize; i++)

  2376.         c->lumPixBuf[i]= c->lumPixBuf[i+c->vLumBufSize]= av_mallocz(VOF+1);

  2377.     for (i=0; i<c->vChrBufSize; i++)

  2378.         c->chrPixBuf[i]= c->chrPixBuf[i+c->vChrBufSize]= av_malloc((VOF+1)*2);

  2379. 

  2380.     //try to avoid drawing green stuff between the right end and the stride end

  2381.     for (i=0; i<c->vChrBufSize; i++) memset(c->chrPixBuf[i], 64, (VOF+1)*2);

  2382. 

  2383.     assert(2*VOFW == VOF);

  2384. 

  2385.     assert(c->chrDstH <= dstH);

  2386. 

  2387.     if (flags&SWS_PRINT_INFO)

  2388.     {

  2389. #ifdef DITHER1XBPP

  2390.         const char *dither= " dithered";

  2391. #else

  2392.         const char *dither= "";

  2393. #endif

  2394.         if (flags&SWS_FAST_BILINEAR)

  2395.             av_log(c, AV_LOG_INFO, "FAST_BILINEAR scaler, ");

  2396.         else if (flags&SWS_BILINEAR)

  2397.             av_log(c, AV_LOG_INFO, "BILINEAR scaler, ");

  2398.         else if (flags&SWS_BICUBIC)

  2399.             av_log(c, AV_LOG_INFO, "BICUBIC scaler, ");

  2400.         else if (flags&SWS_X)

  2401.             av_log(c, AV_LOG_INFO, "Experimental scaler, ");

  2402.         else if (flags&SWS_POINT)

  2403.             av_log(c, AV_LOG_INFO, "Nearest Neighbor / POINT scaler, ");

  2404.         else if (flags&SWS_AREA)

  2405.             av_log(c, AV_LOG_INFO, "Area Averageing scaler, ");

  2406.         else if (flags&SWS_BICUBLIN)

  2407.             av_log(c, AV_LOG_INFO, "luma BICUBIC / chroma BILINEAR scaler, ");

  2408.         else if (flags&SWS_GAUSS)

  2409.             av_log(c, AV_LOG_INFO, "Gaussian scaler, ");

  2410.         else if (flags&SWS_SINC)

  2411.             av_log(c, AV_LOG_INFO, "Sinc scaler, ");

  2412.         else if (flags&SWS_LANCZOS)

  2413.             av_log(c, AV_LOG_INFO, "Lanczos scaler, ");

  2414.         else if (flags&SWS_SPLINE)

  2415.             av_log(c, AV_LOG_INFO, "Bicubic spline scaler, ");

  2416.         else

  2417.             av_log(c, AV_LOG_INFO, "ehh flags invalid?! ");

  2418. 

  2419.         if (dstFormat==PIX_FMT_BGR555 || dstFormat==PIX_FMT_BGR565)

  2420.             av_log(c, AV_LOG_INFO, "from %s to%s %s ",

  2421.                    sws_format_name(srcFormat), dither, sws_format_name(dstFormat));

  2422.         else

  2423.             av_log(c, AV_LOG_INFO, "from %s to %s ",

  2424.                    sws_format_name(srcFormat), sws_format_name(dstFormat));

  2425. 

  2426.         if (flags & SWS_CPU_CAPS_MMX2)

  2427.             av_log(c, AV_LOG_INFO, "using MMX2\n");

  2428.         else if (flags & SWS_CPU_CAPS_3DNOW)

  2429.             av_log(c, AV_LOG_INFO, "using 3DNOW\n");

  2430.         else if (flags & SWS_CPU_CAPS_MMX)

  2431.             av_log(c, AV_LOG_INFO, "using MMX\n");

  2432.         else if (flags & SWS_CPU_CAPS_ALTIVEC)

  2433.             av_log(c, AV_LOG_INFO, "using AltiVec\n");

  2434.         else

  2435.             av_log(c, AV_LOG_INFO, "using C\n");

  2436.     }

  2437. 

  2438.     if (flags & SWS_PRINT_INFO)

  2439.     {

  2440.         if (flags & SWS_CPU_CAPS_MMX)

  2441.         {

  2442.             if (c->canMMX2BeUsed && (flags&SWS_FAST_BILINEAR))

  2443.                 av_log(c, AV_LOG_VERBOSE, "using FAST_BILINEAR MMX2 scaler for horizontal scaling\n");

  2444.             else

  2445.             {

  2446.                 if (c->hLumFilterSize==4)

  2447.                     av_log(c, AV_LOG_VERBOSE, "using 4-tap MMX scaler for horizontal luminance scaling\n");

  2448.                 else if (c->hLumFilterSize==8)

  2449.                     av_log(c, AV_LOG_VERBOSE, "using 8-tap MMX scaler for horizontal luminance scaling\n");

  2450.                 else

  2451.                     av_log(c, AV_LOG_VERBOSE, "using n-tap MMX scaler for horizontal luminance scaling\n");

  2452. 

  2453.                 if (c->hChrFilterSize==4)

  2454.                     av_log(c, AV_LOG_VERBOSE, "using 4-tap MMX scaler for horizontal chrominance scaling\n");

  2455.                 else if (c->hChrFilterSize==8)

  2456.                     av_log(c, AV_LOG_VERBOSE, "using 8-tap MMX scaler for horizontal chrominance scaling\n");

  2457.                 else

  2458.                     av_log(c, AV_LOG_VERBOSE, "using n-tap MMX scaler for horizontal chrominance scaling\n");

  2459.             }

  2460.         }

  2461.         else

  2462.         {

  2463. #if defined(ARCH_X86)

  2464.             av_log(c, AV_LOG_VERBOSE, "using X86-Asm scaler for horizontal scaling\n");

  2465. #else

  2466.             if (flags & SWS_FAST_BILINEAR)

  2467.                 av_log(c, AV_LOG_VERBOSE, "using FAST_BILINEAR C scaler for horizontal scaling\n");

  2468.             else

  2469.                 av_log(c, AV_LOG_VERBOSE, "using C scaler for horizontal scaling\n");

  2470. #endif

  2471.         }

  2472.         if (isPlanarYUV(dstFormat))

  2473.         {

  2474.             if (c->vLumFilterSize==1)

  2475.                 av_log(c, AV_LOG_VERBOSE, "using 1-tap %s \"scaler\" for vertical scaling (YV12 like)\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");

  2476.             else

  2477.                 av_log(c, AV_LOG_VERBOSE, "using n-tap %s scaler for vertical scaling (YV12 like)\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");

  2478.         }

  2479.         else

  2480.         {

  2481.             if (c->vLumFilterSize==1 && c->vChrFilterSize==2)

  2482.                 av_log(c, AV_LOG_VERBOSE, "using 1-tap %s \"scaler\" for vertical luminance scaling (BGR)\n"

  2483.                        "      2-tap scaler for vertical chrominance scaling (BGR)\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");

  2484.             else if (c->vLumFilterSize==2 && c->vChrFilterSize==2)

  2485.                 av_log(c, AV_LOG_VERBOSE, "using 2-tap linear %s scaler for vertical scaling (BGR)\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");

  2486.             else

  2487.                 av_log(c, AV_LOG_VERBOSE, "using n-tap %s scaler for vertical scaling (BGR)\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");

  2488.         }

  2489. 

  2490.         if (dstFormat==PIX_FMT_BGR24)

  2491.             av_log(c, AV_LOG_VERBOSE, "using %s YV12->BGR24 Converter\n",

  2492.                    (flags & SWS_CPU_CAPS_MMX2) ? "MMX2" : ((flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C"));

  2493.         else if (dstFormat==PIX_FMT_RGB32)

  2494.             av_log(c, AV_LOG_VERBOSE, "using %s YV12->BGR32 Converter\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");

  2495.         else if (dstFormat==PIX_FMT_BGR565)

  2496.             av_log(c, AV_LOG_VERBOSE, "using %s YV12->BGR16 Converter\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");

  2497.         else if (dstFormat==PIX_FMT_BGR555)

  2498.             av_log(c, AV_LOG_VERBOSE, "using %s YV12->BGR15 Converter\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");

  2499. 

  2500.         av_log(c, AV_LOG_VERBOSE, "%dx%d -> %dx%d\n", srcW, srcH, dstW, dstH);

  2501.     }

  2502.     if (flags & SWS_PRINT_INFO)

  2503.     {

  2504.         av_log(c, AV_LOG_DEBUG, "Lum srcW=%d srcH=%d dstW=%d dstH=%d xInc=%d yInc=%d\n",

  2505.                c->srcW, c->srcH, c->dstW, c->dstH, c->lumXInc, c->lumYInc);

  2506.         av_log(c, AV_LOG_DEBUG, "Chr srcW=%d srcH=%d dstW=%d dstH=%d xInc=%d yInc=%d\n",

  2507.                c->chrSrcW, c->chrSrcH, c->chrDstW, c->chrDstH, c->chrXInc, c->chrYInc);

  2508.     }

  2509. 

  2510.     c->swScale= getSwsFunc(flags);

  2511.     return c;

  2512. }

  2513. 

  2514. /**

  2515.  * swscale wrapper, so we don't need to export the SwsContext.

  2516.  * assumes planar YUV to be in YUV order instead of YVU

  2517.  */

  2518. int sws_scale(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  2519.               int srcSliceH, uint8_t* dst[], int dstStride[]){

  2520.     int i;

  2521.     uint8_t* src2[4]= {src[0], src[1], src[2]};

  2522.     uint32_t pal[256];

  2523.     if (c->sliceDir == 0 && srcSliceY != 0 && srcSliceY + srcSliceH != c->srcH) {

  2524.         av_log(c, AV_LOG_ERROR, "Slices start in the middle!\n");

  2525.         return 0;

  2526.     }

  2527.     if (c->sliceDir == 0) {

  2528.         if (srcSliceY == 0) c->sliceDir = 1; else c->sliceDir = -1;

  2529.     }

  2530. 

  2531.     if (c->srcFormat == PIX_FMT_PAL8){

  2532.         for (i=0; i<256; i++){

  2533.             int p= ((uint32_t*)(src[1]))[i];

  2534.             int r= (p>>16)&0xFF;

  2535.             int g= (p>> 8)&0xFF;

  2536.             int b=  p     &0xFF;

  2537.             int y= av_clip_uint8(((RY*r + GY*g + BY*b)>>RGB2YUV_SHIFT) + 16 );

  2538.             int u= av_clip_uint8(((RU*r + GU*g + BU*b)>>RGB2YUV_SHIFT) + 128);

  2539.             int v= av_clip_uint8(((RV*r + GV*g + BV*b)>>RGB2YUV_SHIFT) + 128);

  2540.             pal[i]= y + (u<<8) + (v<<16);

  2541.         }

  2542.         src2[1]= (uint8_t*)pal;

  2543.     }

  2544. 

  2545.     // copy strides, so they can safely be modified

  2546.     if (c->sliceDir == 1) {

  2547.         // slices go from top to bottom

  2548.         int srcStride2[4]= {srcStride[0], srcStride[1], srcStride[2]};

  2549.         int dstStride2[4]= {dstStride[0], dstStride[1], dstStride[2]};

  2550.         return c->swScale(c, src2, srcStride2, srcSliceY, srcSliceH, dst, dstStride2);

  2551.     } else {

  2552.         // slices go from bottom to top => we flip the image internally

  2553.         uint8_t* dst2[4]= {dst[0] + (c->dstH-1)*dstStride[0],

  2554.                            dst[1] + ((c->dstH>>c->chrDstVSubSample)-1)*dstStride[1],

  2555.                            dst[2] + ((c->dstH>>c->chrDstVSubSample)-1)*dstStride[2]};

  2556.         int srcStride2[4]= {-srcStride[0], -srcStride[1], -srcStride[2]};

  2557.         int dstStride2[4]= {-dstStride[0], -dstStride[1], -dstStride[2]};

  2558. 

  2559.         src2[0] += (srcSliceH-1)*srcStride[0];

  2560.         if (c->srcFormat != PIX_FMT_PAL8)

  2561.             src2[1] += ((srcSliceH>>c->chrSrcVSubSample)-1)*srcStride[1];

  2562.         src2[2] += ((srcSliceH>>c->chrSrcVSubSample)-1)*srcStride[2];

  2563. 

  2564.         return c->swScale(c, src2, srcStride2, c->srcH-srcSliceY-srcSliceH, srcSliceH, dst2, dstStride2);

  2565.     }

  2566. }

  2567. 

  2568. /**

  2569.  * swscale wrapper, so we don't need to export the SwsContext

  2570.  */

  2571. int sws_scale_ordered(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  2572.                       int srcSliceH, uint8_t* dst[], int dstStride[]){

  2573.     return sws_scale(c, src, srcStride, srcSliceY, srcSliceH, dst, dstStride);

  2574. }

  2575. 

  2576. SwsFilter *sws_getDefaultFilter(float lumaGBlur, float chromaGBlur,

  2577.                                 float lumaSharpen, float chromaSharpen,

  2578.                                 float chromaHShift, float chromaVShift,

  2579.                                 int verbose)

  2580. {

  2581.     SwsFilter *filter= av_malloc(sizeof(SwsFilter));

  2582. 

  2583.     if (lumaGBlur!=0.0){

  2584.         filter->lumH= sws_getGaussianVec(lumaGBlur, 3.0);

  2585.         filter->lumV= sws_getGaussianVec(lumaGBlur, 3.0);

  2586.     }else{

  2587.         filter->lumH= sws_getIdentityVec();

  2588.         filter->lumV= sws_getIdentityVec();

  2589.     }

  2590. 

  2591.     if (chromaGBlur!=0.0){

  2592.         filter->chrH= sws_getGaussianVec(chromaGBlur, 3.0);

  2593.         filter->chrV= sws_getGaussianVec(chromaGBlur, 3.0);

  2594.     }else{

  2595.         filter->chrH= sws_getIdentityVec();

  2596.         filter->chrV= sws_getIdentityVec();

  2597.     }

  2598. 

  2599.     if (chromaSharpen!=0.0){

  2600.         SwsVector *id= sws_getIdentityVec();

  2601.         sws_scaleVec(filter->chrH, -chromaSharpen);

  2602.         sws_scaleVec(filter->chrV, -chromaSharpen);

  2603.         sws_addVec(filter->chrH, id);

  2604.         sws_addVec(filter->chrV, id);

  2605.         sws_freeVec(id);

  2606.     }

  2607. 

  2608.     if (lumaSharpen!=0.0){

  2609.         SwsVector *id= sws_getIdentityVec();

  2610.         sws_scaleVec(filter->lumH, -lumaSharpen);

  2611.         sws_scaleVec(filter->lumV, -lumaSharpen);

  2612.         sws_addVec(filter->lumH, id);

  2613.         sws_addVec(filter->lumV, id);

  2614.         sws_freeVec(id);

  2615.     }

  2616. 

  2617.     if (chromaHShift != 0.0)

  2618.         sws_shiftVec(filter->chrH, (int)(chromaHShift+0.5));

  2619. 

  2620.     if (chromaVShift != 0.0)

  2621.         sws_shiftVec(filter->chrV, (int)(chromaVShift+0.5));

  2622. 

  2623.     sws_normalizeVec(filter->chrH, 1.0);

  2624.     sws_normalizeVec(filter->chrV, 1.0);

  2625.     sws_normalizeVec(filter->lumH, 1.0);

  2626.     sws_normalizeVec(filter->lumV, 1.0);

  2627. 

  2628.     if (verbose) sws_printVec(filter->chrH);

  2629.     if (verbose) sws_printVec(filter->lumH);

  2630. 

  2631.     return filter;

  2632. }

  2633. 

  2634. /**

  2635.  * returns a normalized gaussian curve used to filter stuff

  2636.  * quality=3 is high quality, lowwer is lowwer quality

  2637.  */

  2638. SwsVector *sws_getGaussianVec(double variance, double quality){

  2639.     const int length= (int)(variance*quality + 0.5) | 1;

  2640.     int i;

  2641.     double *coeff= av_malloc(length*sizeof(double));

  2642.     double middle= (length-1)*0.5;

  2643.     SwsVector *vec= av_malloc(sizeof(SwsVector));

  2644. 

  2645.     vec->coeff= coeff;

  2646.     vec->length= length;

  2647. 

  2648.     for (i=0; i<length; i++)

  2649.     {

  2650.         double dist= i-middle;

  2651.         coeff[i]= exp(-dist*dist/(2*variance*variance)) / sqrt(2*variance*PI);

  2652.     }

  2653. 

  2654.     sws_normalizeVec(vec, 1.0);

  2655. 

  2656.     return vec;

  2657. }

  2658. 

  2659. SwsVector *sws_getConstVec(double c, int length){

  2660.     int i;

  2661.     double *coeff= av_malloc(length*sizeof(double));

  2662.     SwsVector *vec= av_malloc(sizeof(SwsVector));

  2663. 

  2664.     vec->coeff= coeff;

  2665.     vec->length= length;

  2666. 

  2667.     for (i=0; i<length; i++)

  2668.         coeff[i]= c;

  2669. 

  2670.     return vec;

  2671. }

  2672. 

  2673. 

  2674. SwsVector *sws_getIdentityVec(void){

  2675.     return sws_getConstVec(1.0, 1);

  2676. }

  2677. 

  2678. double sws_dcVec(SwsVector *a){

  2679.     int i;

  2680.     double sum=0;

  2681. 

  2682.     for (i=0; i<a->length; i++)

  2683.         sum+= a->coeff[i];

  2684. 

  2685.     return sum;

  2686. }

  2687. 

  2688. void sws_scaleVec(SwsVector *a, double scalar){

  2689.     int i;

  2690. 

  2691.     for (i=0; i<a->length; i++)

  2692.         a->coeff[i]*= scalar;

  2693. }

  2694. 

  2695. void sws_normalizeVec(SwsVector *a, double height){

  2696.     sws_scaleVec(a, height/sws_dcVec(a));

  2697. }

  2698. 

  2699. static SwsVector *sws_getConvVec(SwsVector *a, SwsVector *b){

  2700.     int length= a->length + b->length - 1;

  2701.     double *coeff= av_malloc(length*sizeof(double));

  2702.     int i, j;

  2703.     SwsVector *vec= av_malloc(sizeof(SwsVector));

  2704. 

  2705.     vec->coeff= coeff;

  2706.     vec->length= length;

  2707. 

  2708.     for (i=0; i<length; i++) coeff[i]= 0.0;

  2709. 

  2710.     for (i=0; i<a->length; i++)

  2711.     {

  2712.         for (j=0; j<b->length; j++)

  2713.         {

  2714.             coeff[i+j]+= a->coeff[i]*b->coeff[j];

  2715.         }

  2716.     }

  2717. 

  2718.     return vec;

  2719. }

  2720. 

  2721. static SwsVector *sws_sumVec(SwsVector *a, SwsVector *b){

  2722.     int length= FFMAX(a->length, b->length);

  2723.     double *coeff= av_malloc(length*sizeof(double));

  2724.     int i;

  2725.     SwsVector *vec= av_malloc(sizeof(SwsVector));

  2726. 

  2727.     vec->coeff= coeff;

  2728.     vec->length= length;

  2729. 

  2730.     for (i=0; i<length; i++) coeff[i]= 0.0;

  2731. 

  2732.     for (i=0; i<a->length; i++) coeff[i + (length-1)/2 - (a->length-1)/2]+= a->coeff[i];

  2733.     for (i=0; i<b->length; i++) coeff[i + (length-1)/2 - (b->length-1)/2]+= b->coeff[i];

  2734. 

  2735.     return vec;

  2736. }

  2737. 

  2738. static SwsVector *sws_diffVec(SwsVector *a, SwsVector *b){

  2739.     int length= FFMAX(a->length, b->length);

  2740.     double *coeff= av_malloc(length*sizeof(double));

  2741.     int i;

  2742.     SwsVector *vec= av_malloc(sizeof(SwsVector));

  2743. 

  2744.     vec->coeff= coeff;

  2745.     vec->length= length;

  2746. 

  2747.     for (i=0; i<length; i++) coeff[i]= 0.0;

  2748. 

  2749.     for (i=0; i<a->length; i++) coeff[i + (length-1)/2 - (a->length-1)/2]+= a->coeff[i];

  2750.     for (i=0; i<b->length; i++) coeff[i + (length-1)/2 - (b->length-1)/2]-= b->coeff[i];

  2751. 

  2752.     return vec;

  2753. }

  2754. 

  2755. /* shift left / or right if "shift" is negative */

  2756. static SwsVector *sws_getShiftedVec(SwsVector *a, int shift){

  2757.     int length= a->length + FFABS(shift)*2;

  2758.     double *coeff= av_malloc(length*sizeof(double));

  2759.     int i;

  2760.     SwsVector *vec= av_malloc(sizeof(SwsVector));

  2761. 

  2762.     vec->coeff= coeff;

  2763.     vec->length= length;

  2764. 

  2765.     for (i=0; i<length; i++) coeff[i]= 0.0;

  2766. 

  2767.     for (i=0; i<a->length; i++)

  2768.     {

  2769.         coeff[i + (length-1)/2 - (a->length-1)/2 - shift]= a->coeff[i];

  2770.     }

  2771. 

  2772.     return vec;

  2773. }

  2774. 

  2775. void sws_shiftVec(SwsVector *a, int shift){

  2776.     SwsVector *shifted= sws_getShiftedVec(a, shift);

  2777.     av_free(a->coeff);

  2778.     a->coeff= shifted->coeff;

  2779.     a->length= shifted->length;

  2780.     av_free(shifted);

  2781. }

  2782. 

  2783. void sws_addVec(SwsVector *a, SwsVector *b){

  2784.     SwsVector *sum= sws_sumVec(a, b);

  2785.     av_free(a->coeff);

  2786.     a->coeff= sum->coeff;

  2787.     a->length= sum->length;

  2788.     av_free(sum);

  2789. }

  2790. 

  2791. void sws_subVec(SwsVector *a, SwsVector *b){

  2792.     SwsVector *diff= sws_diffVec(a, b);

  2793.     av_free(a->coeff);

  2794.     a->coeff= diff->coeff;

  2795.     a->length= diff->length;

  2796.     av_free(diff);

  2797. }

  2798. 

  2799. void sws_convVec(SwsVector *a, SwsVector *b){

  2800.     SwsVector *conv= sws_getConvVec(a, b);

  2801.     av_free(a->coeff);

  2802.     a->coeff= conv->coeff;

  2803.     a->length= conv->length;

  2804.     av_free(conv);

  2805. }

  2806. 

  2807. SwsVector *sws_cloneVec(SwsVector *a){

  2808.     double *coeff= av_malloc(a->length*sizeof(double));

  2809.     int i;

  2810.     SwsVector *vec= av_malloc(sizeof(SwsVector));

  2811. 

  2812.     vec->coeff= coeff;

  2813.     vec->length= a->length;

  2814. 

  2815.     for (i=0; i<a->length; i++) coeff[i]= a->coeff[i];

  2816. 

  2817.     return vec;

  2818. }

  2819. 

  2820. void sws_printVec(SwsVector *a){

  2821.     int i;

  2822.     double max=0;

  2823.     double min=0;

  2824.     double range;

  2825. 

  2826.     for (i=0; i<a->length; i++)

  2827.         if (a->coeff[i]>max) max= a->coeff[i];

  2828. 

  2829.     for (i=0; i<a->length; i++)

  2830.         if (a->coeff[i]<min) min= a->coeff[i];

  2831. 

  2832.     range= max - min;

  2833. 

  2834.     for (i=0; i<a->length; i++)

  2835.     {

  2836.         int x= (int)((a->coeff[i]-min)*60.0/range +0.5);

  2837.         av_log(NULL, AV_LOG_DEBUG, "%1.3f ", a->coeff[i]);

  2838.         for (;x>0; x--) av_log(NULL, AV_LOG_DEBUG, " ");

  2839.         av_log(NULL, AV_LOG_DEBUG, "|\n");

  2840.     }

  2841. }

  2842. 

  2843. void sws_freeVec(SwsVector *a){

  2844.     if (!a) return;

  2845.     av_free(a->coeff);

  2846.     a->coeff=NULL;

  2847.     a->length=0;

  2848.     av_free(a);

  2849. }

  2850. 

  2851. void sws_freeFilter(SwsFilter *filter){

  2852.     if (!filter) return;

  2853. 

  2854.     if (filter->lumH) sws_freeVec(filter->lumH);

  2855.     if (filter->lumV) sws_freeVec(filter->lumV);

  2856.     if (filter->chrH) sws_freeVec(filter->chrH);

  2857.     if (filter->chrV) sws_freeVec(filter->chrV);

  2858.     av_free(filter);

  2859. }

  2860. 

  2861. 

  2862. void sws_freeContext(SwsContext *c){

  2863.     int i;

  2864.     if (!c) return;

  2865. 

  2866.     if (c->lumPixBuf)

  2867.     {

  2868.         for (i=0; i<c->vLumBufSize; i++)

  2869.         {

  2870.             av_free(c->lumPixBuf[i]);

  2871.             c->lumPixBuf[i]=NULL;

  2872.         }

  2873.         av_free(c->lumPixBuf);

  2874.         c->lumPixBuf=NULL;

  2875.     }

  2876. 

  2877.     if (c->chrPixBuf)

  2878.     {

  2879.         for (i=0; i<c->vChrBufSize; i++)

  2880.         {

  2881.             av_free(c->chrPixBuf[i]);

  2882.             c->chrPixBuf[i]=NULL;

  2883.         }

  2884.         av_free(c->chrPixBuf);

  2885.         c->chrPixBuf=NULL;

  2886.     }

  2887. 

  2888.     av_free(c->vLumFilter);

  2889.     c->vLumFilter = NULL;

  2890.     av_free(c->vChrFilter);

  2891.     c->vChrFilter = NULL;

  2892.     av_free(c->hLumFilter);

  2893.     c->hLumFilter = NULL;

  2894.     av_free(c->hChrFilter);

  2895.     c->hChrFilter = NULL;

  2896. #ifdef HAVE_ALTIVEC

  2897.     av_free(c->vYCoeffsBank);

  2898.     c->vYCoeffsBank = NULL;

  2899.     av_free(c->vCCoeffsBank);

  2900.     c->vCCoeffsBank = NULL;

  2901. #endif

  2902. 

  2903.     av_free(c->vLumFilterPos);

  2904.     c->vLumFilterPos = NULL;

  2905.     av_free(c->vChrFilterPos);

  2906.     c->vChrFilterPos = NULL;

  2907.     av_free(c->hLumFilterPos);

  2908.     c->hLumFilterPos = NULL;

  2909.     av_free(c->hChrFilterPos);

  2910.     c->hChrFilterPos = NULL;

  2911. 

  2912. #if defined(ARCH_X86) && defined(CONFIG_GPL)

  2913. #ifdef MAP_ANONYMOUS

  2914.     if (c->funnyYCode) munmap(c->funnyYCode, MAX_FUNNY_CODE_SIZE);

  2915.     if (c->funnyUVCode) munmap(c->funnyUVCode, MAX_FUNNY_CODE_SIZE);

  2916. #else

  2917.     av_free(c->funnyYCode);

  2918.     av_free(c->funnyUVCode);

  2919. #endif

  2920.     c->funnyYCode=NULL;

  2921.     c->funnyUVCode=NULL;

  2922. #endif /* defined(ARCH_X86) */

  2923. 

  2924.     av_free(c->lumMmx2Filter);

  2925.     c->lumMmx2Filter=NULL;

  2926.     av_free(c->chrMmx2Filter);

  2927.     c->chrMmx2Filter=NULL;

  2928.     av_free(c->lumMmx2FilterPos);

  2929.     c->lumMmx2FilterPos=NULL;

  2930.     av_free(c->chrMmx2FilterPos);

  2931.     c->chrMmx2FilterPos=NULL;

  2932.     av_free(c->yuvTable);

  2933.     c->yuvTable=NULL;

  2934. 

  2935.     av_free(c);

  2936. }

  2937. 

  2938. /**

  2939.  * Checks if context is valid or reallocs a new one instead.

  2940.  * If context is NULL, just calls sws_getContext() to get a new one.

  2941.  * Otherwise, checks if the parameters are the same already saved in context.

  2942.  * If that is the case, returns the current context.

  2943.  * Otherwise, frees context and gets a new one.

  2944.  *

  2945.  * Be warned that srcFilter, dstFilter are not checked, they are

  2946.  * asumed to remain valid.

  2947.  */

  2948. struct SwsContext *sws_getCachedContext(struct SwsContext *context,

  2949.                                         int srcW, int srcH, int srcFormat,

  2950.                                         int dstW, int dstH, int dstFormat, int flags,

  2951.                                         SwsFilter *srcFilter, SwsFilter *dstFilter, double *param)

  2952. {

  2953.     static const double default_param[2] = {SWS_PARAM_DEFAULT, SWS_PARAM_DEFAULT};

  2954. 

  2955.     if (!param)

  2956.         param = default_param;

  2957. 

  2958.     if (context) {

  2959.         if (context->srcW != srcW || context->srcH != srcH ||

  2960.             context->srcFormat != srcFormat ||

  2961.             context->dstW != dstW || context->dstH != dstH ||

  2962.             context->dstFormat != dstFormat || context->flags != flags ||

  2963.             context->param[0] != param[0] || context->param[1] != param[1])

  2964.         {

  2965.             sws_freeContext(context);

  2966.             context = NULL;

  2967.         }

  2968.     }

  2969.     if (!context) {

  2970.         return sws_getContext(srcW, srcH, srcFormat,

  2971.                               dstW, dstH, dstFormat, flags,

  2972.                               srcFilter, dstFilter, param);

  2973.     }

  2974.     return context;

  2975. }