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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, BGR32_1, BGR24, BGR16, BGR15, RGB32, RGB32_1, 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. 

  76. unsigned swscale_version(void)

  77. {

  78.     return LIBSWSCALE_VERSION_INT;

  79. }

  80. 

  81. #undef MOVNTQ

  82. #undef PAVGB

  83. 

  84. //#undef HAVE_MMX2

  85. //#define HAVE_3DNOW

  86. //#undef HAVE_MMX

  87. //#undef ARCH_X86

  88. //#define WORDS_BIGENDIAN

  89. #define DITHER1XBPP

  90. 

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

  92. 

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

  94. 

  95. #ifdef M_PI

  96. #define PI M_PI

  97. #else

  98. #define PI 3.14159265358979323846

  99. #endif

  100. 

  101. #define isSupportedIn(x)    (       \

  102.            (x)==PIX_FMT_YUV420P     \

  103.         || (x)==PIX_FMT_YUVA420P    \

  104.         || (x)==PIX_FMT_YUYV422     \

  105.         || (x)==PIX_FMT_UYVY422     \

  106.         || (x)==PIX_FMT_RGB32       \

  107.         || (x)==PIX_FMT_RGB32_1     \

  108.         || (x)==PIX_FMT_BGR24       \

  109.         || (x)==PIX_FMT_BGR565      \

  110.         || (x)==PIX_FMT_BGR555      \

  111.         || (x)==PIX_FMT_BGR32       \

  112.         || (x)==PIX_FMT_BGR32_1     \

  113.         || (x)==PIX_FMT_RGB24       \

  114.         || (x)==PIX_FMT_RGB565      \

  115.         || (x)==PIX_FMT_RGB555      \

  116.         || (x)==PIX_FMT_GRAY8       \

  117.         || (x)==PIX_FMT_YUV410P     \

  118.         || (x)==PIX_FMT_GRAY16BE    \

  119.         || (x)==PIX_FMT_GRAY16LE    \

  120.         || (x)==PIX_FMT_YUV444P     \

  121.         || (x)==PIX_FMT_YUV422P     \

  122.         || (x)==PIX_FMT_YUV411P     \

  123.         || (x)==PIX_FMT_PAL8        \

  124.         || (x)==PIX_FMT_BGR8        \

  125.         || (x)==PIX_FMT_RGB8        \

  126.         || (x)==PIX_FMT_BGR4_BYTE   \

  127.         || (x)==PIX_FMT_RGB4_BYTE   \

  128.         || (x)==PIX_FMT_YUV440P     \

  129.     )

  130. #define isSupportedOut(x)   (       \

  131.            (x)==PIX_FMT_YUV420P     \

  132.         || (x)==PIX_FMT_YUYV422     \

  133.         || (x)==PIX_FMT_UYVY422     \

  134.         || (x)==PIX_FMT_YUV444P     \

  135.         || (x)==PIX_FMT_YUV422P     \

  136.         || (x)==PIX_FMT_YUV411P     \

  137.         || isRGB(x)                 \

  138.         || isBGR(x)                 \

  139.         || (x)==PIX_FMT_NV12        \

  140.         || (x)==PIX_FMT_NV21        \

  141.         || (x)==PIX_FMT_GRAY16BE    \

  142.         || (x)==PIX_FMT_GRAY16LE    \

  143.         || (x)==PIX_FMT_GRAY8       \

  144.         || (x)==PIX_FMT_YUV410P     \

  145.     )

  146. #define isPacked(x)         (       \

  147.            (x)==PIX_FMT_PAL8        \

  148.         || (x)==PIX_FMT_YUYV422     \

  149.         || (x)==PIX_FMT_UYVY422     \

  150.         || isRGB(x)                 \

  151.         || isBGR(x)                 \

  152.     )

  153. 

  154. #define RGB2YUV_SHIFT 16

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

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

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

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

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

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

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

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

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

  164. 

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

  166. 

  167. /*

  168. NOTES

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

  170. 

  171. TODO

  172. more intelligent misalignment avoidance for the horizontal scaler

  173. write special vertical cubic upscale version

  174. Optimize C code (yv12 / minmax)

  175. add support for packed pixel yuv input & output

  176. add support for Y8 output

  177. optimize bgr24 & bgr32

  178. add BGR4 output support

  179. write special BGR->BGR scaler

  180. */

  181. 

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

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

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

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

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

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

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

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

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

  191. 

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

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

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

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

  196. 

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

  198.         0x0103010301030103LL,

  199.         0x0200020002000200LL,};

  200. 

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

  202.         0x0602060206020602LL,

  203.         0x0004000400040004LL,};

  204. 

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

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

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

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

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

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

  211. 

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

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

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

  215. 

  216. #ifdef FAST_BGR2YV12

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

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

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

  220. #else

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

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

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

  224. #endif /* FAST_BGR2YV12 */

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

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

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

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

  229. 

  230. // clipping helper table for C implementations:

  231. static unsigned char clip_table[768];

  232. 

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

  234. 

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

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

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

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

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

  240. 

  241. const char *sws_format_name(enum PixelFormat format)

  242. {

  243.     switch (format) {

  244.         case PIX_FMT_YUV420P:

  245.             return "yuv420p";

  246.         case PIX_FMT_YUVA420P:

  247.             return "yuva420p";

  248.         case PIX_FMT_YUYV422:

  249.             return "yuyv422";

  250.         case PIX_FMT_RGB24:

  251.             return "rgb24";

  252.         case PIX_FMT_BGR24:

  253.             return "bgr24";

  254.         case PIX_FMT_YUV422P:

  255.             return "yuv422p";

  256.         case PIX_FMT_YUV444P:

  257.             return "yuv444p";

  258.         case PIX_FMT_RGB32:

  259.             return "rgb32";

  260.         case PIX_FMT_YUV410P:

  261.             return "yuv410p";

  262.         case PIX_FMT_YUV411P:

  263.             return "yuv411p";

  264.         case PIX_FMT_RGB565:

  265.             return "rgb565";

  266.         case PIX_FMT_RGB555:

  267.             return "rgb555";

  268.         case PIX_FMT_GRAY16BE:

  269.             return "gray16be";

  270.         case PIX_FMT_GRAY16LE:

  271.             return "gray16le";

  272.         case PIX_FMT_GRAY8:

  273.             return "gray8";

  274.         case PIX_FMT_MONOWHITE:

  275.             return "mono white";

  276.         case PIX_FMT_MONOBLACK:

  277.             return "mono black";

  278.         case PIX_FMT_PAL8:

  279.             return "Palette";

  280.         case PIX_FMT_YUVJ420P:

  281.             return "yuvj420p";

  282.         case PIX_FMT_YUVJ422P:

  283.             return "yuvj422p";

  284.         case PIX_FMT_YUVJ444P:

  285.             return "yuvj444p";

  286.         case PIX_FMT_XVMC_MPEG2_MC:

  287.             return "xvmc_mpeg2_mc";

  288.         case PIX_FMT_XVMC_MPEG2_IDCT:

  289.             return "xvmc_mpeg2_idct";

  290.         case PIX_FMT_UYVY422:

  291.             return "uyvy422";

  292.         case PIX_FMT_UYYVYY411:

  293.             return "uyyvyy411";

  294.         case PIX_FMT_RGB32_1:

  295.             return "rgb32x";

  296.         case PIX_FMT_BGR32_1:

  297.             return "bgr32x";

  298.         case PIX_FMT_BGR32:

  299.             return "bgr32";

  300.         case PIX_FMT_BGR565:

  301.             return "bgr565";

  302.         case PIX_FMT_BGR555:

  303.             return "bgr555";

  304.         case PIX_FMT_BGR8:

  305.             return "bgr8";

  306.         case PIX_FMT_BGR4:

  307.             return "bgr4";

  308.         case PIX_FMT_BGR4_BYTE:

  309.             return "bgr4 byte";

  310.         case PIX_FMT_RGB8:

  311.             return "rgb8";

  312.         case PIX_FMT_RGB4:

  313.             return "rgb4";

  314.         case PIX_FMT_RGB4_BYTE:

  315.             return "rgb4 byte";

  316.         case PIX_FMT_NV12:

  317.             return "nv12";

  318.         case PIX_FMT_NV21:

  319.             return "nv21";

  320.         case PIX_FMT_YUV440P:

  321.             return "yuv440p";

  322.         default:

  323.             return "Unknown format";

  324.     }

  325. }

  326. 

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

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

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

  330. {

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

  332.     int i;

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

  334.     {

  335.         int val=1<<18;

  336.         int j;

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

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

  339. 

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

  341.     }

  342. 

  343.     if (uDest)

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

  345.         {

  346.             int u=1<<18;

  347.             int v=1<<18;

  348.             int j;

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

  350.             {

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

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

  353.             }

  354. 

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

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

  357.         }

  358. }

  359. 

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

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

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

  363. {

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

  365.     int i;

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

  367.     {

  368.         int val=1<<18;

  369.         int j;

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

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

  372. 

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

  374.     }

  375. 

  376.     if (!uDest)

  377.         return;

  378. 

  379.     if (dstFormat == PIX_FMT_NV12)

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

  381.         {

  382.             int u=1<<18;

  383.             int v=1<<18;

  384.             int j;

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

  386.             {

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

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

  389.             }

  390. 

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

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

  393.         }

  394.     else

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

  396.         {

  397.             int u=1<<18;

  398.             int v=1<<18;

  399.             int j;

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

  401.             {

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

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

  404.             }

  405. 

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

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

  408.         }

  409. }

  410. 

  411. #define YSCALE_YUV_2_PACKEDX_C(type) \

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

  413.         int j;\

  414.         int Y1 = 1<<18;\

  415.         int Y2 = 1<<18;\

  416.         int U  = 1<<18;\

  417.         int V  = 1<<18;\

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

  419.         const int i2= 2*i;\

  420.         \

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

  422.         {\

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

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

  425.         }\

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

  427.         {\

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

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

  430.         }\

  431.         Y1>>=19;\

  432.         Y2>>=19;\

  433.         U >>=19;\

  434.         V >>=19;\

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

  436.         {\

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

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

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

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

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

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

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

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

  445.         }

  446. 

  447. #define YSCALE_YUV_2_GRAY16_C(type) \

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

  449.         int j;\

  450.         int Y1 = 1<<18;\

  451.         int Y2 = 1<<18;\

  452.         int U  = 1<<18;\

  453.         int V  = 1<<18;\

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

  455.         const int i2= 2*i;\

  456.         \

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

  458.         {\

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

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

  461.         }\

  462.         Y1>>=11;\

  463.         Y2>>=11;\

  464.         if ((Y1|Y2|U|V)&65536)\

  465.         {\

  466.             if (Y1>65535)   Y1=65535; \

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

  468.             if (Y2>65535)   Y2=65535; \

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

  470.         }

  471. 

  472. #define YSCALE_YUV_2_RGBX_C(type) \

  473.     YSCALE_YUV_2_PACKEDX_C(type)  \

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

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

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

  477. 

  478. #define YSCALE_YUV_2_PACKED2_C   \

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

  480.         const int i2= 2*i;       \

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

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

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

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

  485. 

  486. #define YSCALE_YUV_2_GRAY16_2_C   \

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

  488.         const int i2= 2*i;       \

  489.         int Y1= (buf0[i2  ]*yalpha1+buf1[i2  ]*yalpha)>>11;           \

  490.         int Y2= (buf0[i2+1]*yalpha1+buf1[i2+1]*yalpha)>>11;           \

  491. 

  492. #define YSCALE_YUV_2_RGB2_C(type) \

  493.     YSCALE_YUV_2_PACKED2_C\

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

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

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

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

  498. 

  499. #define YSCALE_YUV_2_PACKED1_C \

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

  501.         const int i2= 2*i;\

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

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

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

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

  506. 

  507. #define YSCALE_YUV_2_GRAY16_1_C \

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

  509.         const int i2= 2*i;\

  510.         int Y1= buf0[i2  ]<<1;\

  511.         int Y2= buf0[i2+1]<<1;\

  512. 

  513. #define YSCALE_YUV_2_RGB1_C(type) \

  514.     YSCALE_YUV_2_PACKED1_C\

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

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

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

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

  519. 

  520. #define YSCALE_YUV_2_PACKED1B_C \

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

  522.         const int i2= 2*i;\

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

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

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

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

  527. 

  528. #define YSCALE_YUV_2_RGB1B_C(type) \

  529.     YSCALE_YUV_2_PACKED1B_C\

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

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

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

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

  534. 

  535. #define YSCALE_YUV_2_ANYRGB_C(func, func2, func_g16)\

  536.     switch(c->dstFormat)\

  537.     {\

  538.     case PIX_FMT_RGB32:\

  539.     case PIX_FMT_BGR32:\

  540.     case PIX_FMT_RGB32_1:\

  541.     case PIX_FMT_BGR32_1:\

  542.         func(uint32_t)\

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

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

  545.         }                \

  546.         break;\

  547.     case PIX_FMT_RGB24:\

  548.         func(uint8_t)\

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

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

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

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

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

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

  555.             dest+=6;\

  556.         }\

  557.         break;\

  558.     case PIX_FMT_BGR24:\

  559.         func(uint8_t)\

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

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

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

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

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

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

  566.             dest+=6;\

  567.         }\

  568.         break;\

  569.     case PIX_FMT_RGB565:\

  570.     case PIX_FMT_BGR565:\

  571.         {\

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

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

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

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

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

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

  578.             func(uint16_t)\

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

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

  581.             }\

  582.         }\

  583.         break;\

  584.     case PIX_FMT_RGB555:\

  585.     case PIX_FMT_BGR555:\

  586.         {\

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

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

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

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

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

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

  593.             func(uint16_t)\

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

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

  596.             }\

  597.         }\

  598.         break;\

  599.     case PIX_FMT_RGB8:\

  600.     case PIX_FMT_BGR8:\

  601.         {\

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

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

  604.             func(uint8_t)\

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

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

  607.             }\

  608.         }\

  609.         break;\

  610.     case PIX_FMT_RGB4:\

  611.     case PIX_FMT_BGR4:\

  612.         {\

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

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

  615.             func(uint8_t)\

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

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

  618.             }\

  619.         }\

  620.         break;\

  621.     case PIX_FMT_RGB4_BYTE:\

  622.     case PIX_FMT_BGR4_BYTE:\

  623.         {\

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

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

  626.             func(uint8_t)\

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

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

  629.             }\

  630.         }\

  631.         break;\

  632.     case PIX_FMT_MONOBLACK:\

  633.         {\

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

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

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

  637.                 int acc;\

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

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

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

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

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

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

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

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

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

  647.                 dest++;\

  648.             }\

  649. \

  650. /*\

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

  652. {\

  653.             int acc=0;\

  654.             int left=0;\

  655.             static int top[1024];\

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

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

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

  659.             int topLeft=0;\

  660.             int shift=0;\

  661.             int count=0;\

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

  663.             int error_new=0;\

  664.             int error_in3=0;\

  665.             int f=0;\

  666.             \

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

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

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

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

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

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

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

  674. \

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

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

  677.                 f= error_new - error_in3*4;\

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

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

  680. \

  681.                 topLeft= top[i];\

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

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

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

  685. \

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

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

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

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

  690.                 }\

  691.             }\

  692. }\

  693. */\

  694.         }\

  695.         break;\

  696.     case PIX_FMT_YUYV422:\

  697.         func2\

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

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

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

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

  702.         }                \

  703.         break;\

  704.     case PIX_FMT_UYVY422:\

  705.         func2\

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

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

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

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

  710.         }                \

  711.         break;\

  712.     case PIX_FMT_GRAY16BE:\

  713.         func_g16\

  714.             ((uint8_t*)dest)[2*i2+0]= Y1>>8;\

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

  716.             ((uint8_t*)dest)[2*i2+2]= Y2>>8;\

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

  718.         }                \

  719.         break;\

  720.     case PIX_FMT_GRAY16LE:\

  721.         func_g16\

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

  723.             ((uint8_t*)dest)[2*i2+1]= Y1>>8;\

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

  725.             ((uint8_t*)dest)[2*i2+3]= Y2>>8;\

  726.         }                \

  727.         break;\

  728.     }\

  729. 

  730. 

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

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

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

  734. {

  735.     int i;

  736.     switch(c->dstFormat)

  737.     {

  738.     case PIX_FMT_BGR32:

  739.     case PIX_FMT_RGB32:

  740.     case PIX_FMT_BGR32_1:

  741.     case PIX_FMT_RGB32_1:

  742.         YSCALE_YUV_2_RGBX_C(uint32_t)

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

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

  745.         }

  746.         break;

  747.     case PIX_FMT_RGB24:

  748.         YSCALE_YUV_2_RGBX_C(uint8_t)

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

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

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

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

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

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

  755.             dest+=6;

  756.         }

  757.         break;

  758.     case PIX_FMT_BGR24:

  759.         YSCALE_YUV_2_RGBX_C(uint8_t)

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

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

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

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

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

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

  766.             dest+=6;

  767.         }

  768.         break;

  769.     case PIX_FMT_RGB565:

  770.     case PIX_FMT_BGR565:

  771.         {

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

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

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

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

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

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

  778.             YSCALE_YUV_2_RGBX_C(uint16_t)

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

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

  781.             }

  782.         }

  783.         break;

  784.     case PIX_FMT_RGB555:

  785.     case PIX_FMT_BGR555:

  786.         {

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

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

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

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

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

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

  793.             YSCALE_YUV_2_RGBX_C(uint16_t)

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

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

  796.             }

  797.         }

  798.         break;

  799.     case PIX_FMT_RGB8:

  800.     case PIX_FMT_BGR8:

  801.         {

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

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

  804.             YSCALE_YUV_2_RGBX_C(uint8_t)

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

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

  807.             }

  808.         }

  809.         break;

  810.     case PIX_FMT_RGB4:

  811.     case PIX_FMT_BGR4:

  812.         {

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

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

  815.             YSCALE_YUV_2_RGBX_C(uint8_t)

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

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

  818.             }

  819.         }

  820.         break;

  821.     case PIX_FMT_RGB4_BYTE:

  822.     case PIX_FMT_BGR4_BYTE:

  823.         {

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

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

  826.             YSCALE_YUV_2_RGBX_C(uint8_t)

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

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

  829.             }

  830.         }

  831.         break;

  832.     case PIX_FMT_MONOBLACK:

  833.         {

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

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

  836.             int acc=0;

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

  838.                 int j;

  839.                 int Y1=1<<18;

  840.                 int Y2=1<<18;

  841. 

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

  843.                 {

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

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

  846.                 }

  847.                 Y1>>=19;

  848.                 Y2>>=19;

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

  850.                 {

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

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

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

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

  855.                 }

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

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

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

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

  860.                     dest++;

  861.                 }

  862.             }

  863.         }

  864.         break;

  865.     case PIX_FMT_YUYV422:

  866.         YSCALE_YUV_2_PACKEDX_C(void)

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

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

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

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

  871.         }

  872.         break;

  873.     case PIX_FMT_UYVY422:

  874.         YSCALE_YUV_2_PACKEDX_C(void)

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

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

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

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

  879.         }

  880.         break;

  881.     case PIX_FMT_GRAY16BE:

  882.         YSCALE_YUV_2_GRAY16_C(void)

  883.             ((uint8_t*)dest)[2*i2+0]= Y1>>8;

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

  885.             ((uint8_t*)dest)[2*i2+2]= Y2>>8;

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

  887.         }

  888.         break;

  889.     case PIX_FMT_GRAY16LE:

  890.         YSCALE_YUV_2_GRAY16_C(void)

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

  892.             ((uint8_t*)dest)[2*i2+1]= Y1>>8;

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

  894.             ((uint8_t*)dest)[2*i2+3]= Y2>>8;

  895.         }

  896.         break;

  897.     }

  898. }

  899. 

  900. 

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

  902. //Plain C versions

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

  904. #define COMPILE_C

  905. #endif

  906. 

  907. #ifdef ARCH_POWERPC

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

  909. #define COMPILE_ALTIVEC

  910. #endif //HAVE_ALTIVEC

  911. #endif //ARCH_POWERPC

  912. 

  913. #if defined(ARCH_X86)

  914. 

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

  916. #define COMPILE_MMX

  917. #endif

  918. 

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

  920. #define COMPILE_MMX2

  921. #endif

  922. 

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

  924. #define COMPILE_3DNOW

  925. #endif

  926. #endif //ARCH_X86 || ARCH_X86_64

  927. 

  928. #undef HAVE_MMX

  929. #undef HAVE_MMX2

  930. #undef HAVE_3DNOW

  931. 

  932. #ifdef COMPILE_C

  933. #undef HAVE_MMX

  934. #undef HAVE_MMX2

  935. #undef HAVE_3DNOW

  936. #undef HAVE_ALTIVEC

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

  938. #include "swscale_template.c"

  939. #endif

  940. 

  941. #ifdef COMPILE_ALTIVEC

  942. #undef RENAME

  943. #define HAVE_ALTIVEC

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

  945. #include "swscale_template.c"

  946. #endif

  947. 

  948. #if defined(ARCH_X86)

  949. 

  950. //X86 versions

  951. /*

  952. #undef RENAME

  953. #undef HAVE_MMX

  954. #undef HAVE_MMX2

  955. #undef HAVE_3DNOW

  956. #define ARCH_X86

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

  958. #include "swscale_template.c"

  959. */

  960. //MMX versions

  961. #ifdef COMPILE_MMX

  962. #undef RENAME

  963. #define HAVE_MMX

  964. #undef HAVE_MMX2

  965. #undef HAVE_3DNOW

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

  967. #include "swscale_template.c"

  968. #endif

  969. 

  970. //MMX2 versions

  971. #ifdef COMPILE_MMX2

  972. #undef RENAME

  973. #define HAVE_MMX

  974. #define HAVE_MMX2

  975. #undef HAVE_3DNOW

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

  977. #include "swscale_template.c"

  978. #endif

  979. 

  980. //3DNOW versions

  981. #ifdef COMPILE_3DNOW

  982. #undef RENAME

  983. #define HAVE_MMX

  984. #undef HAVE_MMX2

  985. #define HAVE_3DNOW

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

  987. #include "swscale_template.c"

  988. #endif

  989. 

  990. #endif //ARCH_X86 || ARCH_X86_64

  991. 

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

  993. 

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

  995. {

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

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

  998.     else                return getSplineCoeff(        0.0,

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

  1000.                                                     c + 3.0*d,

  1001.                                             -b- 3.0*c - 6.0*d,

  1002.                                             dist-1.0);

  1003. }

  1004. 

  1005. static inline int initFilter(int16_t **outFilter, int16_t **filterPos, int *outFilterSize, int xInc,

  1006.                              int srcW, int dstW, int filterAlign, int one, int flags,

  1007.                              SwsVector *srcFilter, SwsVector *dstFilter, double param[2])

  1008. {

  1009.     int i;

  1010.     int filterSize;

  1011.     int filter2Size;

  1012.     int minFilterSize;

  1013.     double *filter=NULL;

  1014.     double *filter2=NULL;

  1015.     int ret= -1;

  1016. #if defined(ARCH_X86)

  1017.     if (flags & SWS_CPU_CAPS_MMX)

  1018.         asm volatile("emms\n\t"::: "memory"); //FIXME this should not be required but it IS (even for non-MMX versions)

  1019. #endif

  1020. 

  1021.     // Note the +1 is for the MMXscaler which reads over the end

  1022.     *filterPos = av_malloc((dstW+1)*sizeof(int16_t));

  1023. 

  1024.     if (FFABS(xInc - 0x10000) <10) // unscaled

  1025.     {

  1026.         int i;

  1027.         filterSize= 1;

  1028.         filter= av_malloc(dstW*sizeof(double)*filterSize);

  1029.         for (i=0; i<dstW*filterSize; i++) filter[i]=0;

  1030. 

  1031.         for (i=0; i<dstW; i++)

  1032.         {

  1033.             filter[i*filterSize]=1;

  1034.             (*filterPos)[i]=i;

  1035.         }

  1036. 

  1037.     }

  1038.     else if (flags&SWS_POINT) // lame looking point sampling mode

  1039.     {

  1040.         int i;

  1041.         int xDstInSrc;

  1042.         filterSize= 1;

  1043.         filter= av_malloc(dstW*sizeof(double)*filterSize);

  1044. 

  1045.         xDstInSrc= xInc/2 - 0x8000;

  1046.         for (i=0; i<dstW; i++)

  1047.         {

  1048.             int xx= (xDstInSrc - ((filterSize-1)<<15) + (1<<15))>>16;

  1049. 

  1050.             (*filterPos)[i]= xx;

  1051.             filter[i]= 1.0;

  1052.             xDstInSrc+= xInc;

  1053.         }

  1054.     }

  1055.     else if ((xInc <= (1<<16) && (flags&SWS_AREA)) || (flags&SWS_FAST_BILINEAR)) // bilinear upscale

  1056.     {

  1057.         int i;

  1058.         int xDstInSrc;

  1059.         if      (flags&SWS_BICUBIC) filterSize= 4;

  1060.         else if (flags&SWS_X      ) filterSize= 4;

  1061.         else                        filterSize= 2; // SWS_BILINEAR / SWS_AREA

  1062.         filter= av_malloc(dstW*sizeof(double)*filterSize);

  1063. 

  1064.         xDstInSrc= xInc/2 - 0x8000;

  1065.         for (i=0; i<dstW; i++)

  1066.         {

  1067.             int xx= (xDstInSrc - ((filterSize-1)<<15) + (1<<15))>>16;

  1068.             int j;

  1069. 

  1070.             (*filterPos)[i]= xx;

  1071.                 //Bilinear upscale / linear interpolate / Area averaging

  1072.                 for (j=0; j<filterSize; j++)

  1073.                 {

  1074.                     double d= FFABS((xx<<16) - xDstInSrc)/(double)(1<<16);

  1075.                     double coeff= 1.0 - d;

  1076.                     if (coeff<0) coeff=0;

  1077.                     filter[i*filterSize + j]= coeff;

  1078.                     xx++;

  1079.                 }

  1080.             xDstInSrc+= xInc;

  1081.         }

  1082.     }

  1083.     else

  1084.     {

  1085.         double xDstInSrc;

  1086.         double sizeFactor, filterSizeInSrc;

  1087.         const double xInc1= (double)xInc / (double)(1<<16);

  1088. 

  1089.         if      (flags&SWS_BICUBIC)      sizeFactor=  4.0;

  1090.         else if (flags&SWS_X)            sizeFactor=  8.0;

  1091.         else if (flags&SWS_AREA)         sizeFactor=  1.0; //downscale only, for upscale it is bilinear

  1092.         else if (flags&SWS_GAUSS)        sizeFactor=  8.0;   // infinite ;)

  1093.         else if (flags&SWS_LANCZOS)      sizeFactor= param[0] != SWS_PARAM_DEFAULT ? 2.0*param[0] : 6.0;

  1094.         else if (flags&SWS_SINC)         sizeFactor= 20.0; // infinite ;)

  1095.         else if (flags&SWS_SPLINE)       sizeFactor= 20.0;  // infinite ;)

  1096.         else if (flags&SWS_BILINEAR)     sizeFactor=  2.0;

  1097.         else {

  1098.             sizeFactor= 0.0; //GCC warning killer

  1099.             assert(0);

  1100.         }

  1101. 

  1102.         if (xInc1 <= 1.0)       filterSizeInSrc= sizeFactor; // upscale

  1103.         else                    filterSizeInSrc= sizeFactor*srcW / (double)dstW;

  1104. 

  1105.         filterSize= (int)ceil(1 + filterSizeInSrc); // will be reduced later if possible

  1106.         if (filterSize > srcW-2) filterSize=srcW-2;

  1107. 

  1108.         filter= av_malloc(dstW*sizeof(double)*filterSize);

  1109. 

  1110.         xDstInSrc= xInc1 / 2.0 - 0.5;

  1111.         for (i=0; i<dstW; i++)

  1112.         {

  1113.             int xx= (int)(xDstInSrc - (filterSize-1)*0.5 + 0.5);

  1114.             int j;

  1115.             (*filterPos)[i]= xx;

  1116.             for (j=0; j<filterSize; j++)

  1117.             {

  1118.                 double d= FFABS(xx - xDstInSrc)/filterSizeInSrc*sizeFactor;

  1119.                 double coeff;

  1120.                 if (flags & SWS_BICUBIC)

  1121.                 {

  1122.                     double B= param[0] != SWS_PARAM_DEFAULT ? param[0] : 0.0;

  1123.                     double C= param[1] != SWS_PARAM_DEFAULT ? param[1] : 0.6;

  1124. 

  1125.                     if (d<1.0)

  1126.                         coeff = (12-9*B-6*C)*d*d*d + (-18+12*B+6*C)*d*d + 6-2*B;

  1127.                     else if (d<2.0)

  1128.                         coeff = (-B-6*C)*d*d*d + (6*B+30*C)*d*d + (-12*B-48*C)*d +8*B+24*C;

  1129.                     else

  1130.                         coeff=0.0;

  1131.                 }

  1132. /*                else if (flags & SWS_X)

  1133.                 {

  1134.                     double p= param ? param*0.01 : 0.3;

  1135.                     coeff = d ? sin(d*PI)/(d*PI) : 1.0;

  1136.                     coeff*= pow(2.0, - p*d*d);

  1137.                 }*/

  1138.                 else if (flags & SWS_X)

  1139.                 {

  1140.                     double A= param[0] != SWS_PARAM_DEFAULT ? param[0] : 1.0;

  1141. 

  1142.                     if (d<1.0)

  1143.                         coeff = cos(d*PI);

  1144.                     else

  1145.                         coeff=-1.0;

  1146.                     if (coeff<0.0)      coeff= -pow(-coeff, A);

  1147.                     else                coeff=  pow( coeff, A);

  1148.                     coeff= coeff*0.5 + 0.5;

  1149.                 }

  1150.                 else if (flags & SWS_AREA)

  1151.                 {

  1152.                     double srcPixelSize= 1.0/xInc1;

  1153.                     if      (d + srcPixelSize/2 < 0.5) coeff= 1.0;

  1154.                     else if (d - srcPixelSize/2 < 0.5) coeff= (0.5-d)/srcPixelSize + 0.5;

  1155.                     else coeff=0.0;

  1156.                 }

  1157.                 else if (flags & SWS_GAUSS)

  1158.                 {

  1159.                     double p= param[0] != SWS_PARAM_DEFAULT ? param[0] : 3.0;

  1160.                     coeff = pow(2.0, - p*d*d);

  1161.                 }

  1162.                 else if (flags & SWS_SINC)

  1163.                 {

  1164.                     coeff = d ? sin(d*PI)/(d*PI) : 1.0;

  1165.                 }

  1166.                 else if (flags & SWS_LANCZOS)

  1167.                 {

  1168.                     double p= param[0] != SWS_PARAM_DEFAULT ? param[0] : 3.0;

  1169.                     coeff = d ? sin(d*PI)*sin(d*PI/p)/(d*d*PI*PI/p) : 1.0;

  1170.                     if (d>p) coeff=0;

  1171.                 }

  1172.                 else if (flags & SWS_BILINEAR)

  1173.                 {

  1174.                     coeff= 1.0 - d;

  1175.                     if (coeff<0) coeff=0;

  1176.                 }

  1177.                 else if (flags & SWS_SPLINE)

  1178.                 {

  1179.                     double p=-2.196152422706632;

  1180.                     coeff = getSplineCoeff(1.0, 0.0, p, -p-1.0, d);

  1181.                 }

  1182.                 else {

  1183.                     coeff= 0.0; //GCC warning killer

  1184.                     assert(0);

  1185.                 }

  1186. 

  1187.                 filter[i*filterSize + j]= coeff;

  1188.                 xx++;

  1189.             }

  1190.             xDstInSrc+= xInc1;

  1191.         }

  1192.     }

  1193. 

  1194.     /* apply src & dst Filter to filter -> filter2

  1195.        av_free(filter);

  1196.     */

  1197.     assert(filterSize>0);

  1198.     filter2Size= filterSize;

  1199.     if (srcFilter) filter2Size+= srcFilter->length - 1;

  1200.     if (dstFilter) filter2Size+= dstFilter->length - 1;

  1201.     assert(filter2Size>0);

  1202.     filter2= av_malloc(filter2Size*dstW*sizeof(double));

  1203. 

  1204.     for (i=0; i<dstW; i++)

  1205.     {

  1206.         int j;

  1207.         SwsVector scaleFilter;

  1208.         SwsVector *outVec;

  1209. 

  1210.         scaleFilter.coeff= filter + i*filterSize;

  1211.         scaleFilter.length= filterSize;

  1212. 

  1213.         if (srcFilter) outVec= sws_getConvVec(srcFilter, &scaleFilter);

  1214.         else           outVec= &scaleFilter;

  1215. 

  1216.         assert(outVec->length == filter2Size);

  1217.         //FIXME dstFilter

  1218. 

  1219.         for (j=0; j<outVec->length; j++)

  1220.         {

  1221.             filter2[i*filter2Size + j]= outVec->coeff[j];

  1222.         }

  1223. 

  1224.         (*filterPos)[i]+= (filterSize-1)/2 - (filter2Size-1)/2;

  1225. 

  1226.         if (outVec != &scaleFilter) sws_freeVec(outVec);

  1227.     }

  1228.     av_freep(&filter);

  1229. 

  1230.     /* try to reduce the filter-size (step1 find size and shift left) */

  1231.     // Assume it is near normalized (*0.5 or *2.0 is OK but * 0.001 is not).

  1232.     minFilterSize= 0;

  1233.     for (i=dstW-1; i>=0; i--)

  1234.     {

  1235.         int min= filter2Size;

  1236.         int j;

  1237.         double cutOff=0.0;

  1238. 

  1239.         /* get rid off near zero elements on the left by shifting left */

  1240.         for (j=0; j<filter2Size; j++)

  1241.         {

  1242.             int k;

  1243.             cutOff += FFABS(filter2[i*filter2Size]);

  1244. 

  1245.             if (cutOff > SWS_MAX_REDUCE_CUTOFF) break;

  1246. 

  1247.             /* preserve monotonicity because the core can't handle the filter otherwise */

  1248.             if (i<dstW-1 && (*filterPos)[i] >= (*filterPos)[i+1]) break;

  1249. 

  1250.             // Move filter coeffs left

  1251.             for (k=1; k<filter2Size; k++)

  1252.                 filter2[i*filter2Size + k - 1]= filter2[i*filter2Size + k];

  1253.             filter2[i*filter2Size + k - 1]= 0.0;

  1254.             (*filterPos)[i]++;

  1255.         }

  1256. 

  1257.         cutOff=0.0;

  1258.         /* count near zeros on the right */

  1259.         for (j=filter2Size-1; j>0; j--)

  1260.         {

  1261.             cutOff += FFABS(filter2[i*filter2Size + j]);

  1262. 

  1263.             if (cutOff > SWS_MAX_REDUCE_CUTOFF) break;

  1264.             min--;

  1265.         }

  1266. 

  1267.         if (min>minFilterSize) minFilterSize= min;

  1268.     }

  1269. 

  1270.     if (flags & SWS_CPU_CAPS_ALTIVEC) {

  1271.         // we can handle the special case 4,

  1272.         // so we don't want to go to the full 8

  1273.         if (minFilterSize < 5)

  1274.             filterAlign = 4;

  1275. 

  1276.         // we really don't want to waste our time

  1277.         // doing useless computation, so fall-back on

  1278.         // the scalar C code for very small filter.

  1279.         // vectorizing is worth it only if you have

  1280.         // decent-sized vector.

  1281.         if (minFilterSize < 3)

  1282.             filterAlign = 1;

  1283.     }

  1284. 

  1285.     if (flags & SWS_CPU_CAPS_MMX) {

  1286.         // special case for unscaled vertical filtering

  1287.         if (minFilterSize == 1 && filterAlign == 2)

  1288.             filterAlign= 1;

  1289.     }

  1290. 

  1291.     assert(minFilterSize > 0);

  1292.     filterSize= (minFilterSize +(filterAlign-1)) & (~(filterAlign-1));

  1293.     assert(filterSize > 0);

  1294.     filter= av_malloc(filterSize*dstW*sizeof(double));

  1295.     if (filterSize >= MAX_FILTER_SIZE || !filter)

  1296.         goto error;

  1297.     *outFilterSize= filterSize;

  1298. 

  1299.     if (flags&SWS_PRINT_INFO)

  1300.         av_log(NULL, AV_LOG_VERBOSE, "SwScaler: reducing / aligning filtersize %d -> %d\n", filter2Size, filterSize);

  1301.     /* try to reduce the filter-size (step2 reduce it) */

  1302.     for (i=0; i<dstW; i++)

  1303.     {

  1304.         int j;

  1305. 

  1306.         for (j=0; j<filterSize; j++)

  1307.         {

  1308.             if (j>=filter2Size) filter[i*filterSize + j]= 0.0;

  1309.             else               filter[i*filterSize + j]= filter2[i*filter2Size + j];

  1310.         }

  1311.     }

  1312. 

  1313. 

  1314.     //FIXME try to align filterpos if possible

  1315. 

  1316.     //fix borders

  1317.     for (i=0; i<dstW; i++)

  1318.     {

  1319.         int j;

  1320.         if ((*filterPos)[i] < 0)

  1321.         {

  1322.             // Move filter coeffs left to compensate for filterPos

  1323.             for (j=1; j<filterSize; j++)

  1324.             {

  1325.                 int left= FFMAX(j + (*filterPos)[i], 0);

  1326.                 filter[i*filterSize + left] += filter[i*filterSize + j];

  1327.                 filter[i*filterSize + j]=0;

  1328.             }

  1329.             (*filterPos)[i]= 0;

  1330.         }

  1331. 

  1332.         if ((*filterPos)[i] + filterSize > srcW)

  1333.         {

  1334.             int shift= (*filterPos)[i] + filterSize - srcW;

  1335.             // Move filter coeffs right to compensate for filterPos

  1336.             for (j=filterSize-2; j>=0; j--)

  1337.             {

  1338.                 int right= FFMIN(j + shift, filterSize-1);

  1339.                 filter[i*filterSize +right] += filter[i*filterSize +j];

  1340.                 filter[i*filterSize +j]=0;

  1341.             }

  1342.             (*filterPos)[i]= srcW - filterSize;

  1343.         }

  1344.     }

  1345. 

  1346.     // Note the +1 is for the MMXscaler which reads over the end

  1347.     /* align at 16 for AltiVec (needed by hScale_altivec_real) */

  1348.     *outFilter= av_mallocz(*outFilterSize*(dstW+1)*sizeof(int16_t));

  1349. 

  1350.     /* Normalize & Store in outFilter */

  1351.     for (i=0; i<dstW; i++)

  1352.     {

  1353.         int j;

  1354.         double error=0;

  1355.         double sum=0;

  1356.         double scale= one;

  1357. 

  1358.         for (j=0; j<filterSize; j++)

  1359.         {

  1360.             sum+= filter[i*filterSize + j];

  1361.         }

  1362.         scale/= sum;

  1363.         for (j=0; j<*outFilterSize; j++)

  1364.         {

  1365.             double v= filter[i*filterSize + j]*scale + error;

  1366.             int intV= floor(v + 0.5);

  1367.             (*outFilter)[i*(*outFilterSize) + j]= intV;

  1368.             error = v - intV;

  1369.         }

  1370.     }

  1371. 

  1372.     (*filterPos)[dstW]= (*filterPos)[dstW-1]; // the MMX scaler will read over the end

  1373.     for (i=0; i<*outFilterSize; i++)

  1374.     {

  1375.         int j= dstW*(*outFilterSize);

  1376.         (*outFilter)[j + i]= (*outFilter)[j + i - (*outFilterSize)];

  1377.     }

  1378. 

  1379.     ret=0;

  1380. error:

  1381.     av_free(filter);

  1382.     av_free(filter2);

  1383.     return ret;

  1384. }

  1385. 

  1386. #ifdef COMPILE_MMX2

  1387. static void initMMX2HScaler(int dstW, int xInc, uint8_t *funnyCode, int16_t *filter, int32_t *filterPos, int numSplits)

  1388. {

  1389.     uint8_t *fragmentA;

  1390.     long imm8OfPShufW1A;

  1391.     long imm8OfPShufW2A;

  1392.     long fragmentLengthA;

  1393.     uint8_t *fragmentB;

  1394.     long imm8OfPShufW1B;

  1395.     long imm8OfPShufW2B;

  1396.     long fragmentLengthB;

  1397.     int fragmentPos;

  1398. 

  1399.     int xpos, i;

  1400. 

  1401.     // create an optimized horizontal scaling routine

  1402. 

  1403.     //code fragment

  1404. 

  1405.     asm volatile(

  1406.         "jmp                         9f                 \n\t"

  1407.     // Begin

  1408.         "0:                                             \n\t"

  1409.         "movq    (%%"REG_d", %%"REG_a"), %%mm3          \n\t"

  1410.         "movd    (%%"REG_c", %%"REG_S"), %%mm0          \n\t"

  1411.         "movd   1(%%"REG_c", %%"REG_S"), %%mm1          \n\t"

  1412.         "punpcklbw                %%mm7, %%mm1          \n\t"

  1413.         "punpcklbw                %%mm7, %%mm0          \n\t"

  1414.         "pshufw                   $0xFF, %%mm1, %%mm1   \n\t"

  1415.         "1:                                             \n\t"

  1416.         "pshufw                   $0xFF, %%mm0, %%mm0   \n\t"

  1417.         "2:                                             \n\t"

  1418.         "psubw                    %%mm1, %%mm0          \n\t"

  1419.         "movl   8(%%"REG_b", %%"REG_a"), %%esi          \n\t"

  1420.         "pmullw                   %%mm3, %%mm0          \n\t"

  1421.         "psllw                       $7, %%mm1          \n\t"

  1422.         "paddw                    %%mm1, %%mm0          \n\t"

  1423. 

  1424.         "movq                     %%mm0, (%%"REG_D", %%"REG_a") \n\t"

  1425. 

  1426.         "add                         $8, %%"REG_a"      \n\t"

  1427.     // End

  1428.         "9:                                             \n\t"

  1429. //        "int $3                                         \n\t"

  1430.         "lea                 " LOCAL_MANGLE(0b) ", %0   \n\t"

  1431.         "lea                 " LOCAL_MANGLE(1b) ", %1   \n\t"

  1432.         "lea                 " LOCAL_MANGLE(2b) ", %2   \n\t"

  1433.         "dec                         %1                 \n\t"

  1434.         "dec                         %2                 \n\t"

  1435.         "sub                         %0, %1             \n\t"

  1436.         "sub                         %0, %2             \n\t"

  1437.         "lea                 " LOCAL_MANGLE(9b) ", %3   \n\t"

  1438.         "sub                         %0, %3             \n\t"

  1439. 

  1440. 

  1441.         :"=r" (fragmentA), "=r" (imm8OfPShufW1A), "=r" (imm8OfPShufW2A),

  1442.         "=r" (fragmentLengthA)

  1443.     );

  1444. 

  1445.     asm volatile(

  1446.         "jmp                         9f                 \n\t"

  1447.     // Begin

  1448.         "0:                                             \n\t"

  1449.         "movq    (%%"REG_d", %%"REG_a"), %%mm3          \n\t"

  1450.         "movd    (%%"REG_c", %%"REG_S"), %%mm0          \n\t"

  1451.         "punpcklbw                %%mm7, %%mm0          \n\t"

  1452.         "pshufw                   $0xFF, %%mm0, %%mm1   \n\t"

  1453.         "1:                                             \n\t"

  1454.         "pshufw                   $0xFF, %%mm0, %%mm0   \n\t"

  1455.         "2:                                             \n\t"

  1456.         "psubw                    %%mm1, %%mm0          \n\t"

  1457.         "movl   8(%%"REG_b", %%"REG_a"), %%esi          \n\t"

  1458.         "pmullw                   %%mm3, %%mm0          \n\t"

  1459.         "psllw                       $7, %%mm1          \n\t"

  1460.         "paddw                    %%mm1, %%mm0          \n\t"

  1461. 

  1462.         "movq                     %%mm0, (%%"REG_D", %%"REG_a") \n\t"

  1463. 

  1464.         "add                         $8, %%"REG_a"      \n\t"

  1465.     // End

  1466.         "9:                                             \n\t"

  1467. //        "int                       $3                   \n\t"

  1468.         "lea                 " LOCAL_MANGLE(0b) ", %0   \n\t"

  1469.         "lea                 " LOCAL_MANGLE(1b) ", %1   \n\t"

  1470.         "lea                 " LOCAL_MANGLE(2b) ", %2   \n\t"

  1471.         "dec                         %1                 \n\t"

  1472.         "dec                         %2                 \n\t"

  1473.         "sub                         %0, %1             \n\t"

  1474.         "sub                         %0, %2             \n\t"

  1475.         "lea                 " LOCAL_MANGLE(9b) ", %3   \n\t"

  1476.         "sub                         %0, %3             \n\t"

  1477. 

  1478. 

  1479.         :"=r" (fragmentB), "=r" (imm8OfPShufW1B), "=r" (imm8OfPShufW2B),

  1480.         "=r" (fragmentLengthB)

  1481.     );

  1482. 

  1483.     xpos= 0; //lumXInc/2 - 0x8000; // difference between pixel centers

  1484.     fragmentPos=0;

  1485. 

  1486.     for (i=0; i<dstW/numSplits; i++)

  1487.     {

  1488.         int xx=xpos>>16;

  1489. 

  1490.         if ((i&3) == 0)

  1491.         {

  1492.             int a=0;

  1493.             int b=((xpos+xInc)>>16) - xx;

  1494.             int c=((xpos+xInc*2)>>16) - xx;

  1495.             int d=((xpos+xInc*3)>>16) - xx;

  1496. 

  1497.             filter[i  ] = (( xpos         & 0xFFFF) ^ 0xFFFF)>>9;

  1498.             filter[i+1] = (((xpos+xInc  ) & 0xFFFF) ^ 0xFFFF)>>9;

  1499.             filter[i+2] = (((xpos+xInc*2) & 0xFFFF) ^ 0xFFFF)>>9;

  1500.             filter[i+3] = (((xpos+xInc*3) & 0xFFFF) ^ 0xFFFF)>>9;

  1501.             filterPos[i/2]= xx;

  1502. 

  1503.             if (d+1<4)

  1504.             {

  1505.                 int maxShift= 3-(d+1);

  1506.                 int shift=0;

  1507. 

  1508.                 memcpy(funnyCode + fragmentPos, fragmentB, fragmentLengthB);

  1509. 

  1510.                 funnyCode[fragmentPos + imm8OfPShufW1B]=

  1511.                     (a+1) | ((b+1)<<2) | ((c+1)<<4) | ((d+1)<<6);

  1512.                 funnyCode[fragmentPos + imm8OfPShufW2B]=

  1513.                     a | (b<<2) | (c<<4) | (d<<6);

  1514. 

  1515.                 if (i+3>=dstW) shift=maxShift; //avoid overread

  1516.                 else if ((filterPos[i/2]&3) <= maxShift) shift=filterPos[i/2]&3; //Align

  1517. 

  1518.                 if (shift && i>=shift)

  1519.                 {

  1520.                     funnyCode[fragmentPos + imm8OfPShufW1B]+= 0x55*shift;

  1521.                     funnyCode[fragmentPos + imm8OfPShufW2B]+= 0x55*shift;

  1522.                     filterPos[i/2]-=shift;

  1523.                 }

  1524. 

  1525.                 fragmentPos+= fragmentLengthB;

  1526.             }

  1527.             else

  1528.             {

  1529.                 int maxShift= 3-d;

  1530.                 int shift=0;

  1531. 

  1532.                 memcpy(funnyCode + fragmentPos, fragmentA, fragmentLengthA);

  1533. 

  1534.                 funnyCode[fragmentPos + imm8OfPShufW1A]=

  1535.                 funnyCode[fragmentPos + imm8OfPShufW2A]=

  1536.                     a | (b<<2) | (c<<4) | (d<<6);

  1537. 

  1538.                 if (i+4>=dstW) shift=maxShift; //avoid overread

  1539.                 else if ((filterPos[i/2]&3) <= maxShift) shift=filterPos[i/2]&3; //partial align

  1540. 

  1541.                 if (shift && i>=shift)

  1542.                 {

  1543.                     funnyCode[fragmentPos + imm8OfPShufW1A]+= 0x55*shift;

  1544.                     funnyCode[fragmentPos + imm8OfPShufW2A]+= 0x55*shift;

  1545.                     filterPos[i/2]-=shift;

  1546.                 }

  1547. 

  1548.                 fragmentPos+= fragmentLengthA;

  1549.             }

  1550. 

  1551.             funnyCode[fragmentPos]= RET;

  1552.         }

  1553.         xpos+=xInc;

  1554.     }

  1555.     filterPos[i/2]= xpos>>16; // needed to jump to the next part

  1556. }

  1557. #endif /* COMPILE_MMX2 */

  1558. 

  1559. static void globalInit(void){

  1560.     // generating tables:

  1561.     int i;

  1562.     for (i=0; i<768; i++){

  1563.         int c= av_clip_uint8(i-256);

  1564.         clip_table[i]=c;

  1565.     }

  1566. }

  1567. 

  1568. static SwsFunc getSwsFunc(int flags){

  1569. 

  1570. #if defined(RUNTIME_CPUDETECT) && defined (CONFIG_GPL)

  1571. #if defined(ARCH_X86)

  1572.     // ordered per speed fastest first

  1573.     if (flags & SWS_CPU_CAPS_MMX2)

  1574.         return swScale_MMX2;

  1575.     else if (flags & SWS_CPU_CAPS_3DNOW)

  1576.         return swScale_3DNow;

  1577.     else if (flags & SWS_CPU_CAPS_MMX)

  1578.         return swScale_MMX;

  1579.     else

  1580.         return swScale_C;

  1581. 

  1582. #else

  1583. #ifdef ARCH_POWERPC

  1584.     if (flags & SWS_CPU_CAPS_ALTIVEC)

  1585.         return swScale_altivec;

  1586.     else

  1587.         return swScale_C;

  1588. #endif

  1589.     return swScale_C;

  1590. #endif /* defined(ARCH_X86) */

  1591. #else //RUNTIME_CPUDETECT

  1592. #ifdef HAVE_MMX2

  1593.     return swScale_MMX2;

  1594. #elif defined (HAVE_3DNOW)

  1595.     return swScale_3DNow;

  1596. #elif defined (HAVE_MMX)

  1597.     return swScale_MMX;

  1598. #elif defined (HAVE_ALTIVEC)

  1599.     return swScale_altivec;

  1600. #else

  1601.     return swScale_C;

  1602. #endif

  1603. #endif //!RUNTIME_CPUDETECT

  1604. }

  1605. 

  1606. static int PlanarToNV12Wrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1607.                                int srcSliceH, uint8_t* dstParam[], int dstStride[]){

  1608.     uint8_t *dst=dstParam[0] + dstStride[0]*srcSliceY;

  1609.     /* Copy Y plane */

  1610.     if (dstStride[0]==srcStride[0] && srcStride[0] > 0)

  1611.         memcpy(dst, src[0], srcSliceH*dstStride[0]);

  1612.     else

  1613.     {

  1614.         int i;

  1615.         uint8_t *srcPtr= src[0];

  1616.         uint8_t *dstPtr= dst;

  1617.         for (i=0; i<srcSliceH; i++)

  1618.         {

  1619.             memcpy(dstPtr, srcPtr, c->srcW);

  1620.             srcPtr+= srcStride[0];

  1621.             dstPtr+= dstStride[0];

  1622.         }

  1623.     }

  1624.     dst = dstParam[1] + dstStride[1]*srcSliceY/2;

  1625.     if (c->dstFormat == PIX_FMT_NV12)

  1626.         interleaveBytes(src[1], src[2], dst, c->srcW/2, srcSliceH/2, srcStride[1], srcStride[2], dstStride[0]);

  1627.     else

  1628.         interleaveBytes(src[2], src[1], dst, c->srcW/2, srcSliceH/2, srcStride[2], srcStride[1], dstStride[0]);

  1629. 

  1630.     return srcSliceH;

  1631. }

  1632. 

  1633. static int PlanarToYuy2Wrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1634.                                int srcSliceH, uint8_t* dstParam[], int dstStride[]){

  1635.     uint8_t *dst=dstParam[0] + dstStride[0]*srcSliceY;

  1636. 

  1637.     yv12toyuy2(src[0], src[1], src[2], dst, c->srcW, srcSliceH, srcStride[0], srcStride[1], dstStride[0]);

  1638. 

  1639.     return srcSliceH;

  1640. }

  1641. 

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

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

  1644.     uint8_t *dst=dstParam[0] + dstStride[0]*srcSliceY;

  1645. 

  1646.     yv12touyvy(src[0], src[1], src[2], dst, c->srcW, srcSliceH, srcStride[0], srcStride[1], dstStride[0]);

  1647. 

  1648.     return srcSliceH;

  1649. }

  1650. 

  1651. static int YUV422PToYuy2Wrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1652.                                 int srcSliceH, uint8_t* dstParam[], int dstStride[]){

  1653.     uint8_t *dst=dstParam[0] + dstStride[0]*srcSliceY;

  1654. 

  1655.     yuv422ptoyuy2(src[0],src[1],src[2],dst,c->srcW,srcSliceH,srcStride[0],srcStride[1],dstStride[0]);

  1656. 

  1657.     return srcSliceH;

  1658. }

  1659. 

  1660. static int YUV422PToUyvyWrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1661.                                 int srcSliceH, uint8_t* dstParam[], int dstStride[]){

  1662.     uint8_t *dst=dstParam[0] + dstStride[0]*srcSliceY;

  1663. 

  1664.     yuv422ptouyvy(src[0],src[1],src[2],dst,c->srcW,srcSliceH,srcStride[0],srcStride[1],dstStride[0]);

  1665. 

  1666.     return srcSliceH;

  1667. }

  1668. 

  1669. /* {RGB,BGR}{15,16,24,32,32_1} -> {RGB,BGR}{15,16,24,32} */

  1670. static int rgb2rgbWrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1671.                           int srcSliceH, uint8_t* dst[], int dstStride[]){

  1672.     const int srcFormat= c->srcFormat;

  1673.     const int dstFormat= c->dstFormat;

  1674.     const int srcBpp= (fmt_depth(srcFormat) + 7) >> 3;

  1675.     const int dstBpp= (fmt_depth(dstFormat) + 7) >> 3;

  1676.     const int srcId= fmt_depth(srcFormat) >> 2; /* 1:0, 4:1, 8:2, 15:3, 16:4, 24:6, 32:8 */

  1677.     const int dstId= fmt_depth(dstFormat) >> 2;

  1678.     void (*conv)(const uint8_t *src, uint8_t *dst, long src_size)=NULL;

  1679. 

  1680.     /* BGR -> BGR */

  1681.     if (  (isBGR(srcFormat) && isBGR(dstFormat))

  1682.        || (isRGB(srcFormat) && isRGB(dstFormat))){

  1683.         switch(srcId | (dstId<<4)){

  1684.         case 0x34: conv= rgb16to15; break;

  1685.         case 0x36: conv= rgb24to15; break;

  1686.         case 0x38: conv= rgb32to15; break;

  1687.         case 0x43: conv= rgb15to16; break;

  1688.         case 0x46: conv= rgb24to16; break;

  1689.         case 0x48: conv= rgb32to16; break;

  1690.         case 0x63: conv= rgb15to24; break;

  1691.         case 0x64: conv= rgb16to24; break;

  1692.         case 0x68: conv= rgb32to24; break;

  1693.         case 0x83: conv= rgb15to32; break;

  1694.         case 0x84: conv= rgb16to32; break;

  1695.         case 0x86: conv= rgb24to32; break;

  1696.         default: av_log(c, AV_LOG_ERROR, "internal error %s -> %s converter\n",

  1697.                         sws_format_name(srcFormat), sws_format_name(dstFormat)); break;

  1698.         }

  1699.     }else if (  (isBGR(srcFormat) && isRGB(dstFormat))

  1700.              || (isRGB(srcFormat) && isBGR(dstFormat))){

  1701.         switch(srcId | (dstId<<4)){

  1702.         case 0x33: conv= rgb15tobgr15; break;

  1703.         case 0x34: conv= rgb16tobgr15; break;

  1704.         case 0x36: conv= rgb24tobgr15; break;

  1705.         case 0x38: conv= rgb32tobgr15; break;

  1706.         case 0x43: conv= rgb15tobgr16; break;

  1707.         case 0x44: conv= rgb16tobgr16; break;

  1708.         case 0x46: conv= rgb24tobgr16; break;

  1709.         case 0x48: conv= rgb32tobgr16; break;

  1710.         case 0x63: conv= rgb15tobgr24; break;

  1711.         case 0x64: conv= rgb16tobgr24; break;

  1712.         case 0x66: conv= rgb24tobgr24; break;

  1713.         case 0x68: conv= rgb32tobgr24; break;

  1714.         case 0x83: conv= rgb15tobgr32; break;

  1715.         case 0x84: conv= rgb16tobgr32; break;

  1716.         case 0x86: conv= rgb24tobgr32; break;

  1717.         case 0x88: conv= rgb32tobgr32; break;

  1718.         default: av_log(c, AV_LOG_ERROR, "internal error %s -> %s converter\n",

  1719.                         sws_format_name(srcFormat), sws_format_name(dstFormat)); break;

  1720.         }

  1721.     }else{

  1722.         av_log(c, AV_LOG_ERROR, "internal error %s -> %s converter\n",

  1723.                sws_format_name(srcFormat), sws_format_name(dstFormat));

  1724.     }

  1725. 

  1726.     if(conv)

  1727.     {

  1728.         uint8_t *srcPtr= src[0];

  1729.         if(srcFormat == PIX_FMT_RGB32_1 || srcFormat == PIX_FMT_BGR32_1)

  1730.             srcPtr += ALT32_CORR;

  1731. 

  1732.         if (dstStride[0]*srcBpp == srcStride[0]*dstBpp && srcStride[0] > 0)

  1733.             conv(srcPtr, dst[0] + dstStride[0]*srcSliceY, srcSliceH*srcStride[0]);

  1734.         else

  1735.         {

  1736.             int i;

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

  1738. 

  1739.             for (i=0; i<srcSliceH; i++)

  1740.             {

  1741.                 conv(srcPtr, dstPtr, c->srcW*srcBpp);

  1742.                 srcPtr+= srcStride[0];

  1743.                 dstPtr+= dstStride[0];

  1744.             }

  1745.         }

  1746.     }

  1747.     return srcSliceH;

  1748. }

  1749. 

  1750. static int bgr24toyv12Wrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1751.                               int srcSliceH, uint8_t* dst[], int dstStride[]){

  1752. 

  1753.     rgb24toyv12(

  1754.         src[0],

  1755.         dst[0]+ srcSliceY    *dstStride[0],

  1756.         dst[1]+(srcSliceY>>1)*dstStride[1],

  1757.         dst[2]+(srcSliceY>>1)*dstStride[2],

  1758.         c->srcW, srcSliceH,

  1759.         dstStride[0], dstStride[1], srcStride[0]);

  1760.     return srcSliceH;

  1761. }

  1762. 

  1763. static int yvu9toyv12Wrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

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

  1765.     int i;

  1766. 

  1767.     /* copy Y */

  1768.     if (srcStride[0]==dstStride[0] && srcStride[0] > 0)

  1769.         memcpy(dst[0]+ srcSliceY*dstStride[0], src[0], srcStride[0]*srcSliceH);

  1770.     else{

  1771.         uint8_t *srcPtr= src[0];

  1772.         uint8_t *dstPtr= dst[0] + dstStride[0]*srcSliceY;

  1773. 

  1774.         for (i=0; i<srcSliceH; i++)

  1775.         {

  1776.             memcpy(dstPtr, srcPtr, c->srcW);

  1777.             srcPtr+= srcStride[0];

  1778.             dstPtr+= dstStride[0];

  1779.         }

  1780.     }

  1781. 

  1782.     if (c->dstFormat==PIX_FMT_YUV420P){

  1783.         planar2x(src[1], dst[1], c->chrSrcW, c->chrSrcH, srcStride[1], dstStride[1]);

  1784.         planar2x(src[2], dst[2], c->chrSrcW, c->chrSrcH, srcStride[2], dstStride[2]);

  1785.     }else{

  1786.         planar2x(src[1], dst[2], c->chrSrcW, c->chrSrcH, srcStride[1], dstStride[2]);

  1787.         planar2x(src[2], dst[1], c->chrSrcW, c->chrSrcH, srcStride[2], dstStride[1]);

  1788.     }

  1789.     return srcSliceH;

  1790. }

  1791. 

  1792. /* unscaled copy like stuff (assumes nearly identical formats) */

  1793. static int packedCopy(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1794.                       int srcSliceH, uint8_t* dst[], int dstStride[])

  1795. {

  1796.     if (dstStride[0]==srcStride[0] && srcStride[0] > 0)

  1797.         memcpy(dst[0] + dstStride[0]*srcSliceY, src[0], srcSliceH*dstStride[0]);

  1798.     else

  1799.     {

  1800.         int i;

  1801.         uint8_t *srcPtr= src[0];

  1802.         uint8_t *dstPtr= dst[0] + dstStride[0]*srcSliceY;

  1803.         int length=0;

  1804. 

  1805.         /* universal length finder */

  1806.         while(length+c->srcW <= FFABS(dstStride[0])

  1807.            && length+c->srcW <= FFABS(srcStride[0])) length+= c->srcW;

  1808.         assert(length!=0);

  1809. 

  1810.         for (i=0; i<srcSliceH; i++)

  1811.         {

  1812.             memcpy(dstPtr, srcPtr, length);

  1813.             srcPtr+= srcStride[0];

  1814.             dstPtr+= dstStride[0];

  1815.         }

  1816.     }

  1817.     return srcSliceH;

  1818. }

  1819. 

  1820. static int planarCopy(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1821.                       int srcSliceH, uint8_t* dst[], int dstStride[])

  1822. {

  1823.     int plane;

  1824.     for (plane=0; plane<3; plane++)

  1825.     {

  1826.         int length= plane==0 ? c->srcW  : -((-c->srcW  )>>c->chrDstHSubSample);

  1827.         int y=      plane==0 ? srcSliceY: -((-srcSliceY)>>c->chrDstVSubSample);

  1828.         int height= plane==0 ? srcSliceH: -((-srcSliceH)>>c->chrDstVSubSample);

  1829. 

  1830.         if ((isGray(c->srcFormat) || isGray(c->dstFormat)) && plane>0)

  1831.         {

  1832.             if (!isGray(c->dstFormat))

  1833.                 memset(dst[plane], 128, dstStride[plane]*height);

  1834.         }

  1835.         else

  1836.         {

  1837.             if (dstStride[plane]==srcStride[plane] && srcStride[plane] > 0)

  1838.                 memcpy(dst[plane] + dstStride[plane]*y, src[plane], height*dstStride[plane]);

  1839.             else

  1840.             {

  1841.                 int i;

  1842.                 uint8_t *srcPtr= src[plane];

  1843.                 uint8_t *dstPtr= dst[plane] + dstStride[plane]*y;

  1844.                 for (i=0; i<height; i++)

  1845.                 {

  1846.                     memcpy(dstPtr, srcPtr, length);

  1847.                     srcPtr+= srcStride[plane];

  1848.                     dstPtr+= dstStride[plane];

  1849.                 }

  1850.             }

  1851.         }

  1852.     }

  1853.     return srcSliceH;

  1854. }

  1855. 

  1856. static int gray16togray(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1857.                         int srcSliceH, uint8_t* dst[], int dstStride[]){

  1858. 

  1859.     int length= c->srcW;

  1860.     int y=      srcSliceY;

  1861.     int height= srcSliceH;

  1862.     int i, j;

  1863.     uint8_t *srcPtr= src[0];

  1864.     uint8_t *dstPtr= dst[0] + dstStride[0]*y;

  1865. 

  1866.     if (!isGray(c->dstFormat)){

  1867.         int height= -((-srcSliceH)>>c->chrDstVSubSample);

  1868.         memset(dst[1], 128, dstStride[1]*height);

  1869.         memset(dst[2], 128, dstStride[2]*height);

  1870.     }

  1871.     if (c->srcFormat == PIX_FMT_GRAY16LE) srcPtr++;

  1872.     for (i=0; i<height; i++)

  1873.     {

  1874.         for (j=0; j<length; j++) dstPtr[j] = srcPtr[j<<1];

  1875.         srcPtr+= srcStride[0];

  1876.         dstPtr+= dstStride[0];

  1877.     }

  1878.     return srcSliceH;

  1879. }

  1880. 

  1881. static int graytogray16(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1882.                         int srcSliceH, uint8_t* dst[], int dstStride[]){

  1883. 

  1884.     int length= c->srcW;

  1885.     int y=      srcSliceY;

  1886.     int height= srcSliceH;

  1887.     int i, j;

  1888.     uint8_t *srcPtr= src[0];

  1889.     uint8_t *dstPtr= dst[0] + dstStride[0]*y;

  1890.     for (i=0; i<height; i++)

  1891.     {

  1892.         for (j=0; j<length; j++)

  1893.         {

  1894.             dstPtr[j<<1] = srcPtr[j];

  1895.             dstPtr[(j<<1)+1] = srcPtr[j];

  1896.         }

  1897.         srcPtr+= srcStride[0];

  1898.         dstPtr+= dstStride[0];

  1899.     }

  1900.     return srcSliceH;

  1901. }

  1902. 

  1903. static int gray16swap(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1904.                       int srcSliceH, uint8_t* dst[], int dstStride[]){

  1905. 

  1906.     int length= c->srcW;

  1907.     int y=      srcSliceY;

  1908.     int height= srcSliceH;

  1909.     int i, j;

  1910.     uint16_t *srcPtr= (uint16_t*)src[0];

  1911.     uint16_t *dstPtr= (uint16_t*)(dst[0] + dstStride[0]*y/2);

  1912.     for (i=0; i<height; i++)

  1913.     {

  1914.         for (j=0; j<length; j++) dstPtr[j] = bswap_16(srcPtr[j]);

  1915.         srcPtr+= srcStride[0]/2;

  1916.         dstPtr+= dstStride[0]/2;

  1917.     }

  1918.     return srcSliceH;

  1919. }

  1920. 

  1921. 

  1922. static void getSubSampleFactors(int *h, int *v, int format){

  1923.     switch(format){

  1924.     case PIX_FMT_UYVY422:

  1925.     case PIX_FMT_YUYV422:

  1926.         *h=1;

  1927.         *v=0;

  1928.         break;

  1929.     case PIX_FMT_YUV420P:

  1930.     case PIX_FMT_YUVA420P:

  1931.     case PIX_FMT_GRAY16BE:

  1932.     case PIX_FMT_GRAY16LE:

  1933.     case PIX_FMT_GRAY8: //FIXME remove after different subsamplings are fully implemented

  1934.     case PIX_FMT_NV12:

  1935.     case PIX_FMT_NV21:

  1936.         *h=1;

  1937.         *v=1;

  1938.         break;

  1939.     case PIX_FMT_YUV440P:

  1940.         *h=0;

  1941.         *v=1;

  1942.         break;

  1943.     case PIX_FMT_YUV410P:

  1944.         *h=2;

  1945.         *v=2;

  1946.         break;

  1947.     case PIX_FMT_YUV444P:

  1948.         *h=0;

  1949.         *v=0;

  1950.         break;

  1951.     case PIX_FMT_YUV422P:

  1952.         *h=1;

  1953.         *v=0;

  1954.         break;

  1955.     case PIX_FMT_YUV411P:

  1956.         *h=2;

  1957.         *v=0;

  1958.         break;

  1959.     default:

  1960.         *h=0;

  1961.         *v=0;

  1962.         break;

  1963.     }

  1964. }

  1965. 

  1966. static uint16_t roundToInt16(int64_t f){

  1967.     int r= (f + (1<<15))>>16;

  1968.          if (r<-0x7FFF) return 0x8000;

  1969.     else if (r> 0x7FFF) return 0x7FFF;

  1970.     else                return r;

  1971. }

  1972. 

  1973. /**

  1974.  * @param inv_table the yuv2rgb coeffs, normally Inverse_Table_6_9[x]

  1975.  * @param fullRange if 1 then the luma range is 0..255 if 0 it is 16..235

  1976.  * @return -1 if not supported

  1977.  */

  1978. int sws_setColorspaceDetails(SwsContext *c, const int inv_table[4], int srcRange, const int table[4], int dstRange, int brightness, int contrast, int saturation){

  1979.     int64_t crv =  inv_table[0];

  1980.     int64_t cbu =  inv_table[1];

  1981.     int64_t cgu = -inv_table[2];

  1982.     int64_t cgv = -inv_table[3];

  1983.     int64_t cy  = 1<<16;

  1984.     int64_t oy  = 0;

  1985. 

  1986.     if (isYUV(c->dstFormat) || isGray(c->dstFormat)) return -1;

  1987.     memcpy(c->srcColorspaceTable, inv_table, sizeof(int)*4);

  1988.     memcpy(c->dstColorspaceTable,     table, sizeof(int)*4);

  1989. 

  1990.     c->brightness= brightness;

  1991.     c->contrast  = contrast;

  1992.     c->saturation= saturation;

  1993.     c->srcRange  = srcRange;

  1994.     c->dstRange  = dstRange;

  1995. 

  1996.     c->uOffset=   0x0400040004000400LL;

  1997.     c->vOffset=   0x0400040004000400LL;

  1998. 

  1999.     if (!srcRange){

  2000.         cy= (cy*255) / 219;

  2001.         oy= 16<<16;

  2002.     }else{

  2003.         crv= (crv*224) / 255;

  2004.         cbu= (cbu*224) / 255;

  2005.         cgu= (cgu*224) / 255;

  2006.         cgv= (cgv*224) / 255;

  2007.     }

  2008. 

  2009.     cy = (cy *contrast             )>>16;

  2010.     crv= (crv*contrast * saturation)>>32;

  2011.     cbu= (cbu*contrast * saturation)>>32;

  2012.     cgu= (cgu*contrast * saturation)>>32;

  2013.     cgv= (cgv*contrast * saturation)>>32;

  2014. 

  2015.     oy -= 256*brightness;

  2016. 

  2017.     c->yCoeff=    roundToInt16(cy *8192) * 0x0001000100010001ULL;

  2018.     c->vrCoeff=   roundToInt16(crv*8192) * 0x0001000100010001ULL;

  2019.     c->ubCoeff=   roundToInt16(cbu*8192) * 0x0001000100010001ULL;

  2020.     c->vgCoeff=   roundToInt16(cgv*8192) * 0x0001000100010001ULL;

  2021.     c->ugCoeff=   roundToInt16(cgu*8192) * 0x0001000100010001ULL;

  2022.     c->yOffset=   roundToInt16(oy *   8) * 0x0001000100010001ULL;

  2023. 

  2024.     yuv2rgb_c_init_tables(c, inv_table, srcRange, brightness, contrast, saturation);

  2025.     //FIXME factorize

  2026. 

  2027. #ifdef COMPILE_ALTIVEC

  2028.     if (c->flags & SWS_CPU_CAPS_ALTIVEC)

  2029.         yuv2rgb_altivec_init_tables (c, inv_table, brightness, contrast, saturation);

  2030. #endif

  2031.     return 0;

  2032. }

  2033. 

  2034. /**

  2035.  * @return -1 if not supported

  2036.  */

  2037. int sws_getColorspaceDetails(SwsContext *c, int **inv_table, int *srcRange, int **table, int *dstRange, int *brightness, int *contrast, int *saturation){

  2038.     if (isYUV(c->dstFormat) || isGray(c->dstFormat)) return -1;

  2039. 

  2040.     *inv_table = c->srcColorspaceTable;

  2041.     *table     = c->dstColorspaceTable;

  2042.     *srcRange  = c->srcRange;

  2043.     *dstRange  = c->dstRange;

  2044.     *brightness= c->brightness;

  2045.     *contrast  = c->contrast;

  2046.     *saturation= c->saturation;

  2047. 

  2048.     return 0;

  2049. }

  2050. 

  2051. static int handle_jpeg(int *format)

  2052. {

  2053.     switch (*format) {

  2054.         case PIX_FMT_YUVJ420P:

  2055.             *format = PIX_FMT_YUV420P;

  2056.             return 1;

  2057.         case PIX_FMT_YUVJ422P:

  2058.             *format = PIX_FMT_YUV422P;

  2059.             return 1;

  2060.         case PIX_FMT_YUVJ444P:

  2061.             *format = PIX_FMT_YUV444P;

  2062.             return 1;

  2063.         case PIX_FMT_YUVJ440P:

  2064.             *format = PIX_FMT_YUV440P;

  2065.             return 1;

  2066.         default:

  2067.             return 0;

  2068.     }

  2069. }

  2070. 

  2071. SwsContext *sws_getContext(int srcW, int srcH, int srcFormat, int dstW, int dstH, int dstFormat, int flags,

  2072.                            SwsFilter *srcFilter, SwsFilter *dstFilter, double *param){

  2073. 

  2074.     SwsContext *c;

  2075.     int i;

  2076.     int usesVFilter, usesHFilter;

  2077.     int unscaled, needsDither;

  2078.     int srcRange, dstRange;

  2079.     SwsFilter dummyFilter= {NULL, NULL, NULL, NULL};

  2080. #if defined(ARCH_X86)

  2081.     if (flags & SWS_CPU_CAPS_MMX)

  2082.         asm volatile("emms\n\t"::: "memory");

  2083. #endif

  2084. 

  2085. #if !defined(RUNTIME_CPUDETECT) || !defined (CONFIG_GPL) //ensure that the flags match the compiled variant if cpudetect is off

  2086.     flags &= ~(SWS_CPU_CAPS_MMX|SWS_CPU_CAPS_MMX2|SWS_CPU_CAPS_3DNOW|SWS_CPU_CAPS_ALTIVEC|SWS_CPU_CAPS_BFIN);

  2087. #ifdef HAVE_MMX2

  2088.     flags |= SWS_CPU_CAPS_MMX|SWS_CPU_CAPS_MMX2;

  2089. #elif defined (HAVE_3DNOW)

  2090.     flags |= SWS_CPU_CAPS_MMX|SWS_CPU_CAPS_3DNOW;

  2091. #elif defined (HAVE_MMX)

  2092.     flags |= SWS_CPU_CAPS_MMX;

  2093. #elif defined (HAVE_ALTIVEC)

  2094.     flags |= SWS_CPU_CAPS_ALTIVEC;

  2095. #elif defined (ARCH_BFIN)

  2096.     flags |= SWS_CPU_CAPS_BFIN;

  2097. #endif

  2098. #endif /* RUNTIME_CPUDETECT */

  2099.     if (clip_table[512] != 255) globalInit();

  2100.     if (!rgb15to16) sws_rgb2rgb_init(flags);

  2101. 

  2102.     unscaled = (srcW == dstW && srcH == dstH);

  2103.     needsDither= (isBGR(dstFormat) || isRGB(dstFormat))

  2104.         && (fmt_depth(dstFormat))<24

  2105.         && ((fmt_depth(dstFormat))<(fmt_depth(srcFormat)) || (!(isRGB(srcFormat) || isBGR(srcFormat))));

  2106. 

  2107.     srcRange = handle_jpeg(&srcFormat);

  2108.     dstRange = handle_jpeg(&dstFormat);

  2109. 

  2110.     if (!isSupportedIn(srcFormat))

  2111.     {

  2112.         av_log(NULL, AV_LOG_ERROR, "swScaler: %s is not supported as input pixel format\n", sws_format_name(srcFormat));

  2113.         return NULL;

  2114.     }

  2115.     if (!isSupportedOut(dstFormat))

  2116.     {

  2117.         av_log(NULL, AV_LOG_ERROR, "swScaler: %s is not supported as output pixel format\n", sws_format_name(dstFormat));

  2118.         return NULL;

  2119.     }

  2120. 

  2121.     i= flags & ( SWS_POINT

  2122.                 |SWS_AREA

  2123.                 |SWS_BILINEAR

  2124.                 |SWS_FAST_BILINEAR

  2125.                 |SWS_BICUBIC

  2126.                 |SWS_X

  2127.                 |SWS_GAUSS

  2128.                 |SWS_LANCZOS

  2129.                 |SWS_SINC

  2130.                 |SWS_SPLINE

  2131.                 |SWS_BICUBLIN);

  2132.     if(!i || (i & (i-1)))

  2133.     {

  2134.         av_log(NULL, AV_LOG_ERROR, "swScaler: Exactly one scaler algorithm must be choosen\n");

  2135.         return NULL;

  2136.     }

  2137. 

  2138. 

  2139.     /* sanity check */

  2140.     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

  2141.     {

  2142.         av_log(NULL, AV_LOG_ERROR, "swScaler: %dx%d -> %dx%d is invalid scaling dimension\n",

  2143.                srcW, srcH, dstW, dstH);

  2144.         return NULL;

  2145.     }

  2146.     if(srcW > VOFW || dstW > VOFW){

  2147.         av_log(NULL, AV_LOG_ERROR, "swScaler: Compile time max width is "AV_STRINGIFY(VOFW)" change VOF/VOFW and recompile\n");

  2148.         return NULL;

  2149.     }

  2150. 

  2151.     if (!dstFilter) dstFilter= &dummyFilter;

  2152.     if (!srcFilter) srcFilter= &dummyFilter;

  2153. 

  2154.     c= av_mallocz(sizeof(SwsContext));

  2155. 

  2156.     c->av_class = &sws_context_class;

  2157.     c->srcW= srcW;

  2158.     c->srcH= srcH;

  2159.     c->dstW= dstW;

  2160.     c->dstH= dstH;

  2161.     c->lumXInc= ((srcW<<16) + (dstW>>1))/dstW;

  2162.     c->lumYInc= ((srcH<<16) + (dstH>>1))/dstH;

  2163.     c->flags= flags;

  2164.     c->dstFormat= dstFormat;

  2165.     c->srcFormat= srcFormat;

  2166.     c->vRounder= 4* 0x0001000100010001ULL;

  2167. 

  2168.     usesHFilter= usesVFilter= 0;

  2169.     if (dstFilter->lumV && dstFilter->lumV->length>1) usesVFilter=1;

  2170.     if (dstFilter->lumH && dstFilter->lumH->length>1) usesHFilter=1;

  2171.     if (dstFilter->chrV && dstFilter->chrV->length>1) usesVFilter=1;

  2172.     if (dstFilter->chrH && dstFilter->chrH->length>1) usesHFilter=1;

  2173.     if (srcFilter->lumV && srcFilter->lumV->length>1) usesVFilter=1;

  2174.     if (srcFilter->lumH && srcFilter->lumH->length>1) usesHFilter=1;

  2175.     if (srcFilter->chrV && srcFilter->chrV->length>1) usesVFilter=1;

  2176.     if (srcFilter->chrH && srcFilter->chrH->length>1) usesHFilter=1;

  2177. 

  2178.     getSubSampleFactors(&c->chrSrcHSubSample, &c->chrSrcVSubSample, srcFormat);

  2179.     getSubSampleFactors(&c->chrDstHSubSample, &c->chrDstVSubSample, dstFormat);

  2180. 

  2181.     // reuse chroma for 2 pixles rgb/bgr unless user wants full chroma interpolation

  2182.     if ((isBGR(dstFormat) || isRGB(dstFormat)) && !(flags&SWS_FULL_CHR_H_INT)) c->chrDstHSubSample=1;

  2183. 

  2184.     // drop some chroma lines if the user wants it

  2185.     c->vChrDrop= (flags&SWS_SRC_V_CHR_DROP_MASK)>>SWS_SRC_V_CHR_DROP_SHIFT;

  2186.     c->chrSrcVSubSample+= c->vChrDrop;

  2187. 

  2188.     // drop every 2. pixel for chroma calculation unless user wants full chroma

  2189.     if ((isBGR(srcFormat) || isRGB(srcFormat)) && !(flags&SWS_FULL_CHR_H_INP)

  2190.       && srcFormat!=PIX_FMT_RGB8      && srcFormat!=PIX_FMT_BGR8

  2191.       && srcFormat!=PIX_FMT_RGB4      && srcFormat!=PIX_FMT_BGR4

  2192.       && srcFormat!=PIX_FMT_RGB4_BYTE && srcFormat!=PIX_FMT_BGR4_BYTE)

  2193.         c->chrSrcHSubSample=1;

  2194. 

  2195.     if (param){

  2196.         c->param[0] = param[0];

  2197.         c->param[1] = param[1];

  2198.     }else{

  2199.         c->param[0] =

  2200.         c->param[1] = SWS_PARAM_DEFAULT;

  2201.     }

  2202. 

  2203.     c->chrIntHSubSample= c->chrDstHSubSample;

  2204.     c->chrIntVSubSample= c->chrSrcVSubSample;

  2205. 

  2206.     // Note the -((-x)>>y) is so that we always round toward +inf.

  2207.     c->chrSrcW= -((-srcW) >> c->chrSrcHSubSample);

  2208.     c->chrSrcH= -((-srcH) >> c->chrSrcVSubSample);

  2209.     c->chrDstW= -((-dstW) >> c->chrDstHSubSample);

  2210.     c->chrDstH= -((-dstH) >> c->chrDstVSubSample);

  2211. 

  2212.     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);

  2213. 

  2214.     /* unscaled special Cases */

  2215.     if (unscaled && !usesHFilter && !usesVFilter)

  2216.     {

  2217.         /* yv12_to_nv12 */

  2218.         if (srcFormat == PIX_FMT_YUV420P && (dstFormat == PIX_FMT_NV12 || dstFormat == PIX_FMT_NV21))

  2219.         {

  2220.             c->swScale= PlanarToNV12Wrapper;

  2221.         }

  2222. #ifdef CONFIG_GPL

  2223.         /* yuv2bgr */

  2224.         if ((srcFormat==PIX_FMT_YUV420P || srcFormat==PIX_FMT_YUV422P) && (isBGR(dstFormat) || isRGB(dstFormat)))

  2225.         {

  2226.             c->swScale= yuv2rgb_get_func_ptr(c);

  2227.         }

  2228. #endif

  2229. 

  2230.         if (srcFormat==PIX_FMT_YUV410P && dstFormat==PIX_FMT_YUV420P)

  2231.         {

  2232.             c->swScale= yvu9toyv12Wrapper;

  2233.         }

  2234. 

  2235.         /* bgr24toYV12 */

  2236.         if (srcFormat==PIX_FMT_BGR24 && dstFormat==PIX_FMT_YUV420P)

  2237.             c->swScale= bgr24toyv12Wrapper;

  2238. 

  2239.         /* rgb/bgr -> rgb/bgr (no dither needed forms) */

  2240.         if (  (isBGR(srcFormat) || isRGB(srcFormat))

  2241.            && (isBGR(dstFormat) || isRGB(dstFormat))

  2242.            && srcFormat != PIX_FMT_BGR8      && dstFormat != PIX_FMT_BGR8

  2243.            && srcFormat != PIX_FMT_RGB8      && dstFormat != PIX_FMT_RGB8

  2244.            && srcFormat != PIX_FMT_BGR4      && dstFormat != PIX_FMT_BGR4

  2245.            && srcFormat != PIX_FMT_RGB4      && dstFormat != PIX_FMT_RGB4

  2246.            && srcFormat != PIX_FMT_BGR4_BYTE && dstFormat != PIX_FMT_BGR4_BYTE

  2247.            && srcFormat != PIX_FMT_RGB4_BYTE && dstFormat != PIX_FMT_RGB4_BYTE

  2248.            && srcFormat != PIX_FMT_MONOBLACK && dstFormat != PIX_FMT_MONOBLACK

  2249.                                              && dstFormat != PIX_FMT_RGB32_1

  2250.                                              && dstFormat != PIX_FMT_BGR32_1

  2251.            && (!needsDither || (c->flags&(SWS_FAST_BILINEAR|SWS_POINT))))

  2252.              c->swScale= rgb2rgbWrapper;

  2253. 

  2254.         if (srcFormat == PIX_FMT_YUV422P)

  2255.         {

  2256.             if (dstFormat == PIX_FMT_YUYV422)

  2257.                 c->swScale= YUV422PToYuy2Wrapper;

  2258.             else if (dstFormat == PIX_FMT_UYVY422)

  2259.                 c->swScale= YUV422PToUyvyWrapper;

  2260.         }

  2261. 

  2262.         /* LQ converters if -sws 0 or -sws 4*/

  2263.         if (c->flags&(SWS_FAST_BILINEAR|SWS_POINT)){

  2264.             /* yv12_to_yuy2 */

  2265.             if (srcFormat == PIX_FMT_YUV420P)

  2266.             {

  2267.                 if (dstFormat == PIX_FMT_YUYV422)

  2268.                     c->swScale= PlanarToYuy2Wrapper;

  2269.                 else if (dstFormat == PIX_FMT_UYVY422)

  2270.                     c->swScale= PlanarToUyvyWrapper;

  2271.             }

  2272.         }

  2273. 

  2274. #ifdef COMPILE_ALTIVEC

  2275.         if ((c->flags & SWS_CPU_CAPS_ALTIVEC) &&

  2276.             srcFormat == PIX_FMT_YUV420P) {

  2277.           // unscaled YV12 -> packed YUV, we want speed

  2278.           if (dstFormat == PIX_FMT_YUYV422)

  2279.               c->swScale= yv12toyuy2_unscaled_altivec;

  2280.           else if (dstFormat == PIX_FMT_UYVY422)

  2281.               c->swScale= yv12touyvy_unscaled_altivec;

  2282.         }

  2283. #endif

  2284. 

  2285.         /* simple copy */

  2286.         if (  srcFormat == dstFormat

  2287.             || (isPlanarYUV(srcFormat) && isGray(dstFormat))

  2288.             || (isPlanarYUV(dstFormat) && isGray(srcFormat)))

  2289.         {

  2290.             if (isPacked(c->srcFormat))

  2291.                 c->swScale= packedCopy;

  2292.             else /* Planar YUV or gray */

  2293.                 c->swScale= planarCopy;

  2294.         }

  2295. 

  2296.         /* gray16{le,be} conversions */

  2297.         if (isGray16(srcFormat) && (isPlanarYUV(dstFormat) || (dstFormat == PIX_FMT_GRAY8)))

  2298.         {

  2299.             c->swScale= gray16togray;

  2300.         }

  2301.         if ((isPlanarYUV(srcFormat) || (srcFormat == PIX_FMT_GRAY8)) && isGray16(dstFormat))

  2302.         {

  2303.             c->swScale= graytogray16;

  2304.         }

  2305.         if (srcFormat != dstFormat && isGray16(srcFormat) && isGray16(dstFormat))

  2306.         {

  2307.             c->swScale= gray16swap;

  2308.         }

  2309. 

  2310. #ifdef ARCH_BFIN

  2311.         if (flags & SWS_CPU_CAPS_BFIN)

  2312.             ff_bfin_get_unscaled_swscale (c);

  2313. #endif

  2314. 

  2315.         if (c->swScale){

  2316.             if (flags&SWS_PRINT_INFO)

  2317.                 av_log(c, AV_LOG_INFO, "using unscaled %s -> %s special converter\n",

  2318.                                 sws_format_name(srcFormat), sws_format_name(dstFormat));

  2319.             return c;

  2320.         }

  2321.     }

  2322. 

  2323.     if (flags & SWS_CPU_CAPS_MMX2)

  2324.     {

  2325.         c->canMMX2BeUsed= (dstW >=srcW && (dstW&31)==0 && (srcW&15)==0) ? 1 : 0;

  2326.         if (!c->canMMX2BeUsed && dstW >=srcW && (srcW&15)==0 && (flags&SWS_FAST_BILINEAR))

  2327.         {

  2328.             if (flags&SWS_PRINT_INFO)

  2329.                 av_log(c, AV_LOG_INFO, "output Width is not a multiple of 32 -> no MMX2 scaler\n");

  2330.         }

  2331.         if (usesHFilter) c->canMMX2BeUsed=0;

  2332.     }

  2333.     else

  2334.         c->canMMX2BeUsed=0;

  2335. 

  2336.     c->chrXInc= ((c->chrSrcW<<16) + (c->chrDstW>>1))/c->chrDstW;

  2337.     c->chrYInc= ((c->chrSrcH<<16) + (c->chrDstH>>1))/c->chrDstH;

  2338. 

  2339.     // match pixel 0 of the src to pixel 0 of dst and match pixel n-2 of src to pixel n-2 of dst

  2340.     // but only for the FAST_BILINEAR mode otherwise do correct scaling

  2341.     // n-2 is the last chrominance sample available

  2342.     // this is not perfect, but no one should notice the difference, the more correct variant

  2343.     // would be like the vertical one, but that would require some special code for the

  2344.     // first and last pixel

  2345.     if (flags&SWS_FAST_BILINEAR)

  2346.     {

  2347.         if (c->canMMX2BeUsed)

  2348.         {

  2349.             c->lumXInc+= 20;

  2350.             c->chrXInc+= 20;

  2351.         }

  2352.         //we don't use the x86asm scaler if mmx is available

  2353.         else if (flags & SWS_CPU_CAPS_MMX)

  2354.         {

  2355.             c->lumXInc = ((srcW-2)<<16)/(dstW-2) - 20;

  2356.             c->chrXInc = ((c->chrSrcW-2)<<16)/(c->chrDstW-2) - 20;

  2357.         }

  2358.     }

  2359. 

  2360.     /* precalculate horizontal scaler filter coefficients */

  2361.     {

  2362.         const int filterAlign=

  2363.             (flags & SWS_CPU_CAPS_MMX) ? 4 :

  2364.             (flags & SWS_CPU_CAPS_ALTIVEC) ? 8 :

  2365.             1;

  2366. 

  2367.         initFilter(&c->hLumFilter, &c->hLumFilterPos, &c->hLumFilterSize, c->lumXInc,

  2368.                    srcW      ,       dstW, filterAlign, 1<<14,

  2369.                    (flags&SWS_BICUBLIN) ? (flags|SWS_BICUBIC)  : flags,

  2370.                    srcFilter->lumH, dstFilter->lumH, c->param);

  2371.         initFilter(&c->hChrFilter, &c->hChrFilterPos, &c->hChrFilterSize, c->chrXInc,

  2372.                    c->chrSrcW, c->chrDstW, filterAlign, 1<<14,

  2373.                    (flags&SWS_BICUBLIN) ? (flags|SWS_BILINEAR) : flags,

  2374.                    srcFilter->chrH, dstFilter->chrH, c->param);

  2375. 

  2376. #define MAX_FUNNY_CODE_SIZE 10000

  2377. #if defined(COMPILE_MMX2)

  2378. // can't downscale !!!

  2379.         if (c->canMMX2BeUsed && (flags & SWS_FAST_BILINEAR))

  2380.         {

  2381. #ifdef MAP_ANONYMOUS

  2382.             c->funnyYCode = (uint8_t*)mmap(NULL, MAX_FUNNY_CODE_SIZE, PROT_EXEC | PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, 0, 0);

  2383.             c->funnyUVCode = (uint8_t*)mmap(NULL, MAX_FUNNY_CODE_SIZE, PROT_EXEC | PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, 0, 0);

  2384. #else

  2385.             c->funnyYCode = av_malloc(MAX_FUNNY_CODE_SIZE);

  2386.             c->funnyUVCode = av_malloc(MAX_FUNNY_CODE_SIZE);

  2387. #endif

  2388. 

  2389.             c->lumMmx2Filter   = av_malloc((dstW        /8+8)*sizeof(int16_t));

  2390.             c->chrMmx2Filter   = av_malloc((c->chrDstW  /4+8)*sizeof(int16_t));

  2391.             c->lumMmx2FilterPos= av_malloc((dstW      /2/8+8)*sizeof(int32_t));

  2392.             c->chrMmx2FilterPos= av_malloc((c->chrDstW/2/4+8)*sizeof(int32_t));

  2393. 

  2394.             initMMX2HScaler(      dstW, c->lumXInc, c->funnyYCode , c->lumMmx2Filter, c->lumMmx2FilterPos, 8);

  2395.             initMMX2HScaler(c->chrDstW, c->chrXInc, c->funnyUVCode, c->chrMmx2Filter, c->chrMmx2FilterPos, 4);

  2396.         }

  2397. #endif /* defined(COMPILE_MMX2) */

  2398.     } // Init Horizontal stuff

  2399. 

  2400. 

  2401. 

  2402.     /* precalculate vertical scaler filter coefficients */

  2403.     {

  2404.         const int filterAlign=

  2405.             (flags & SWS_CPU_CAPS_MMX) && (flags & SWS_ACCURATE_RND) ? 2 :

  2406.             (flags & SWS_CPU_CAPS_ALTIVEC) ? 8 :

  2407.             1;

  2408. 

  2409.         initFilter(&c->vLumFilter, &c->vLumFilterPos, &c->vLumFilterSize, c->lumYInc,

  2410.                    srcH      ,        dstH, filterAlign, (1<<12)-4,

  2411.                    (flags&SWS_BICUBLIN) ? (flags|SWS_BICUBIC)  : flags,

  2412.                    srcFilter->lumV, dstFilter->lumV, c->param);

  2413.         initFilter(&c->vChrFilter, &c->vChrFilterPos, &c->vChrFilterSize, c->chrYInc,

  2414.                    c->chrSrcH, c->chrDstH, filterAlign, (1<<12)-4,

  2415.                    (flags&SWS_BICUBLIN) ? (flags|SWS_BILINEAR) : flags,

  2416.                    srcFilter->chrV, dstFilter->chrV, c->param);

  2417. 

  2418. #ifdef HAVE_ALTIVEC

  2419.         c->vYCoeffsBank = av_malloc(sizeof (vector signed short)*c->vLumFilterSize*c->dstH);

  2420.         c->vCCoeffsBank = av_malloc(sizeof (vector signed short)*c->vChrFilterSize*c->chrDstH);

  2421. 

  2422.         for (i=0;i<c->vLumFilterSize*c->dstH;i++) {

  2423.             int j;

  2424.             short *p = (short *)&c->vYCoeffsBank[i];

  2425.             for (j=0;j<8;j++)

  2426.                 p[j] = c->vLumFilter[i];

  2427.         }

  2428. 

  2429.         for (i=0;i<c->vChrFilterSize*c->chrDstH;i++) {

  2430.             int j;

  2431.             short *p = (short *)&c->vCCoeffsBank[i];

  2432.             for (j=0;j<8;j++)

  2433.                 p[j] = c->vChrFilter[i];

  2434.         }

  2435. #endif

  2436.     }

  2437. 

  2438.     // Calculate Buffer Sizes so that they won't run out while handling these damn slices

  2439.     c->vLumBufSize= c->vLumFilterSize;

  2440.     c->vChrBufSize= c->vChrFilterSize;

  2441.     for (i=0; i<dstH; i++)

  2442.     {

  2443.         int chrI= i*c->chrDstH / dstH;

  2444.         int nextSlice= FFMAX(c->vLumFilterPos[i   ] + c->vLumFilterSize - 1,

  2445.                            ((c->vChrFilterPos[chrI] + c->vChrFilterSize - 1)<<c->chrSrcVSubSample));

  2446. 

  2447.         nextSlice>>= c->chrSrcVSubSample;

  2448.         nextSlice<<= c->chrSrcVSubSample;

  2449.         if (c->vLumFilterPos[i   ] + c->vLumBufSize < nextSlice)

  2450.             c->vLumBufSize= nextSlice - c->vLumFilterPos[i];

  2451.         if (c->vChrFilterPos[chrI] + c->vChrBufSize < (nextSlice>>c->chrSrcVSubSample))

  2452.             c->vChrBufSize= (nextSlice>>c->chrSrcVSubSample) - c->vChrFilterPos[chrI];

  2453.     }

  2454. 

  2455.     // allocate pixbufs (we use dynamic allocation because otherwise we would need to

  2456.     c->lumPixBuf= av_malloc(c->vLumBufSize*2*sizeof(int16_t*));

  2457.     c->chrPixBuf= av_malloc(c->vChrBufSize*2*sizeof(int16_t*));

  2458.     //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)

  2459.     /* align at 16 bytes for AltiVec */

  2460.     for (i=0; i<c->vLumBufSize; i++)

  2461.         c->lumPixBuf[i]= c->lumPixBuf[i+c->vLumBufSize]= av_mallocz(VOF+1);

  2462.     for (i=0; i<c->vChrBufSize; i++)

  2463.         c->chrPixBuf[i]= c->chrPixBuf[i+c->vChrBufSize]= av_malloc((VOF+1)*2);

  2464. 

  2465.     //try to avoid drawing green stuff between the right end and the stride end

  2466.     for (i=0; i<c->vChrBufSize; i++) memset(c->chrPixBuf[i], 64, (VOF+1)*2);

  2467. 

  2468.     assert(2*VOFW == VOF);

  2469. 

  2470.     assert(c->chrDstH <= dstH);

  2471. 

  2472.     if (flags&SWS_PRINT_INFO)

  2473.     {

  2474. #ifdef DITHER1XBPP

  2475.         const char *dither= " dithered";

  2476. #else

  2477.         const char *dither= "";

  2478. #endif

  2479.         if (flags&SWS_FAST_BILINEAR)

  2480.             av_log(c, AV_LOG_INFO, "FAST_BILINEAR scaler, ");

  2481.         else if (flags&SWS_BILINEAR)

  2482.             av_log(c, AV_LOG_INFO, "BILINEAR scaler, ");

  2483.         else if (flags&SWS_BICUBIC)

  2484.             av_log(c, AV_LOG_INFO, "BICUBIC scaler, ");

  2485.         else if (flags&SWS_X)

  2486.             av_log(c, AV_LOG_INFO, "Experimental scaler, ");

  2487.         else if (flags&SWS_POINT)

  2488.             av_log(c, AV_LOG_INFO, "Nearest Neighbor / POINT scaler, ");

  2489.         else if (flags&SWS_AREA)

  2490.             av_log(c, AV_LOG_INFO, "Area Averageing scaler, ");

  2491.         else if (flags&SWS_BICUBLIN)

  2492.             av_log(c, AV_LOG_INFO, "luma BICUBIC / chroma BILINEAR scaler, ");

  2493.         else if (flags&SWS_GAUSS)

  2494.             av_log(c, AV_LOG_INFO, "Gaussian scaler, ");

  2495.         else if (flags&SWS_SINC)

  2496.             av_log(c, AV_LOG_INFO, "Sinc scaler, ");

  2497.         else if (flags&SWS_LANCZOS)

  2498.             av_log(c, AV_LOG_INFO, "Lanczos scaler, ");

  2499.         else if (flags&SWS_SPLINE)

  2500.             av_log(c, AV_LOG_INFO, "Bicubic spline scaler, ");

  2501.         else

  2502.             av_log(c, AV_LOG_INFO, "ehh flags invalid?! ");

  2503. 

  2504.         if (dstFormat==PIX_FMT_BGR555 || dstFormat==PIX_FMT_BGR565)

  2505.             av_log(c, AV_LOG_INFO, "from %s to%s %s ",

  2506.                    sws_format_name(srcFormat), dither, sws_format_name(dstFormat));

  2507.         else

  2508.             av_log(c, AV_LOG_INFO, "from %s to %s ",

  2509.                    sws_format_name(srcFormat), sws_format_name(dstFormat));

  2510. 

  2511.         if (flags & SWS_CPU_CAPS_MMX2)

  2512.             av_log(c, AV_LOG_INFO, "using MMX2\n");

  2513.         else if (flags & SWS_CPU_CAPS_3DNOW)

  2514.             av_log(c, AV_LOG_INFO, "using 3DNOW\n");

  2515.         else if (flags & SWS_CPU_CAPS_MMX)

  2516.             av_log(c, AV_LOG_INFO, "using MMX\n");

  2517.         else if (flags & SWS_CPU_CAPS_ALTIVEC)

  2518.             av_log(c, AV_LOG_INFO, "using AltiVec\n");

  2519.         else

  2520.             av_log(c, AV_LOG_INFO, "using C\n");

  2521.     }

  2522. 

  2523.     if (flags & SWS_PRINT_INFO)

  2524.     {

  2525.         if (flags & SWS_CPU_CAPS_MMX)

  2526.         {

  2527.             if (c->canMMX2BeUsed && (flags&SWS_FAST_BILINEAR))

  2528.                 av_log(c, AV_LOG_VERBOSE, "using FAST_BILINEAR MMX2 scaler for horizontal scaling\n");

  2529.             else

  2530.             {

  2531.                 if (c->hLumFilterSize==4)

  2532.                     av_log(c, AV_LOG_VERBOSE, "using 4-tap MMX scaler for horizontal luminance scaling\n");

  2533.                 else if (c->hLumFilterSize==8)

  2534.                     av_log(c, AV_LOG_VERBOSE, "using 8-tap MMX scaler for horizontal luminance scaling\n");

  2535.                 else

  2536.                     av_log(c, AV_LOG_VERBOSE, "using n-tap MMX scaler for horizontal luminance scaling\n");

  2537. 

  2538.                 if (c->hChrFilterSize==4)

  2539.                     av_log(c, AV_LOG_VERBOSE, "using 4-tap MMX scaler for horizontal chrominance scaling\n");

  2540.                 else if (c->hChrFilterSize==8)

  2541.                     av_log(c, AV_LOG_VERBOSE, "using 8-tap MMX scaler for horizontal chrominance scaling\n");

  2542.                 else

  2543.                     av_log(c, AV_LOG_VERBOSE, "using n-tap MMX scaler for horizontal chrominance scaling\n");

  2544.             }

  2545.         }

  2546.         else

  2547.         {

  2548. #if defined(ARCH_X86)

  2549.             av_log(c, AV_LOG_VERBOSE, "using X86-Asm scaler for horizontal scaling\n");

  2550. #else

  2551.             if (flags & SWS_FAST_BILINEAR)

  2552.                 av_log(c, AV_LOG_VERBOSE, "using FAST_BILINEAR C scaler for horizontal scaling\n");

  2553.             else

  2554.                 av_log(c, AV_LOG_VERBOSE, "using C scaler for horizontal scaling\n");

  2555. #endif

  2556.         }

  2557.         if (isPlanarYUV(dstFormat))

  2558.         {

  2559.             if (c->vLumFilterSize==1)

  2560.                 av_log(c, AV_LOG_VERBOSE, "using 1-tap %s \"scaler\" for vertical scaling (YV12 like)\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");

  2561.             else

  2562.                 av_log(c, AV_LOG_VERBOSE, "using n-tap %s scaler for vertical scaling (YV12 like)\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");

  2563.         }

  2564.         else

  2565.         {

  2566.             if (c->vLumFilterSize==1 && c->vChrFilterSize==2)

  2567.                 av_log(c, AV_LOG_VERBOSE, "using 1-tap %s \"scaler\" for vertical luminance scaling (BGR)\n"

  2568.                        "      2-tap scaler for vertical chrominance scaling (BGR)\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");

  2569.             else if (c->vLumFilterSize==2 && c->vChrFilterSize==2)

  2570.                 av_log(c, AV_LOG_VERBOSE, "using 2-tap linear %s scaler for vertical scaling (BGR)\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");

  2571.             else

  2572.                 av_log(c, AV_LOG_VERBOSE, "using n-tap %s scaler for vertical scaling (BGR)\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");

  2573.         }

  2574. 

  2575.         if (dstFormat==PIX_FMT_BGR24)

  2576.             av_log(c, AV_LOG_VERBOSE, "using %s YV12->BGR24 Converter\n",

  2577.                    (flags & SWS_CPU_CAPS_MMX2) ? "MMX2" : ((flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C"));

  2578.         else if (dstFormat==PIX_FMT_RGB32)

  2579.             av_log(c, AV_LOG_VERBOSE, "using %s YV12->BGR32 Converter\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");

  2580.         else if (dstFormat==PIX_FMT_BGR565)

  2581.             av_log(c, AV_LOG_VERBOSE, "using %s YV12->BGR16 Converter\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");

  2582.         else if (dstFormat==PIX_FMT_BGR555)

  2583.             av_log(c, AV_LOG_VERBOSE, "using %s YV12->BGR15 Converter\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");

  2584. 

  2585.         av_log(c, AV_LOG_VERBOSE, "%dx%d -> %dx%d\n", srcW, srcH, dstW, dstH);

  2586.     }

  2587.     if (flags & SWS_PRINT_INFO)

  2588.     {

  2589.         av_log(c, AV_LOG_DEBUG, "Lum srcW=%d srcH=%d dstW=%d dstH=%d xInc=%d yInc=%d\n",

  2590.                c->srcW, c->srcH, c->dstW, c->dstH, c->lumXInc, c->lumYInc);

  2591.         av_log(c, AV_LOG_DEBUG, "Chr srcW=%d srcH=%d dstW=%d dstH=%d xInc=%d yInc=%d\n",

  2592.                c->chrSrcW, c->chrSrcH, c->chrDstW, c->chrDstH, c->chrXInc, c->chrYInc);

  2593.     }

  2594. 

  2595.     c->swScale= getSwsFunc(flags);

  2596.     return c;

  2597. }

  2598. 

  2599. /**

  2600.  * swscale wrapper, so we don't need to export the SwsContext.

  2601.  * assumes planar YUV to be in YUV order instead of YVU

  2602.  */

  2603. int sws_scale(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  2604.               int srcSliceH, uint8_t* dst[], int dstStride[]){

  2605.     int i;

  2606.     uint8_t* src2[4]= {src[0], src[1], src[2]};

  2607.     uint32_t pal[256];

  2608.     int use_pal=   c->srcFormat == PIX_FMT_PAL8

  2609.                 || c->srcFormat == PIX_FMT_BGR4_BYTE

  2610.                 || c->srcFormat == PIX_FMT_RGB4_BYTE

  2611.                 || c->srcFormat == PIX_FMT_BGR8

  2612.                 || c->srcFormat == PIX_FMT_RGB8;

  2613. 

  2614.     if (c->sliceDir == 0 && srcSliceY != 0 && srcSliceY + srcSliceH != c->srcH) {

  2615.         av_log(c, AV_LOG_ERROR, "Slices start in the middle!\n");

  2616.         return 0;

  2617.     }

  2618.     if (c->sliceDir == 0) {

  2619.         if (srcSliceY == 0) c->sliceDir = 1; else c->sliceDir = -1;

  2620.     }

  2621. 

  2622.     if (use_pal){

  2623.         for (i=0; i<256; i++){

  2624.             int p, r, g, b,y,u,v;

  2625.             if(c->srcFormat == PIX_FMT_PAL8){

  2626.                 p=((uint32_t*)(src[1]))[i];

  2627.                 r= (p>>16)&0xFF;

  2628.                 g= (p>> 8)&0xFF;

  2629.                 b=  p     &0xFF;

  2630.             }else if(c->srcFormat == PIX_FMT_RGB8){

  2631.                 r= (i>>5    )*36;

  2632.                 g= ((i>>2)&7)*36;

  2633.                 b= (i&3     )*85;

  2634.             }else if(c->srcFormat == PIX_FMT_BGR8){

  2635.                 b= (i>>6    )*85;

  2636.                 g= ((i>>3)&7)*36;

  2637.                 r= (i&7     )*36;

  2638.             }else if(c->srcFormat == PIX_FMT_RGB4_BYTE){

  2639.                 r= (i>>3    )*255;

  2640.                 g= ((i>>1)&3)*85;

  2641.                 b= (i&1     )*255;

  2642.             }else if(c->srcFormat == PIX_FMT_BGR4_BYTE){

  2643.                 b= (i>>3    )*255;

  2644.                 g= ((i>>1)&3)*85;

  2645.                 r= (i&1     )*255;

  2646.             }

  2647.             y= av_clip_uint8(((RY*r + GY*g + BY*b)>>RGB2YUV_SHIFT) + 16 );

  2648.             u= av_clip_uint8(((RU*r + GU*g + BU*b)>>RGB2YUV_SHIFT) + 128);

  2649.             v= av_clip_uint8(((RV*r + GV*g + BV*b)>>RGB2YUV_SHIFT) + 128);

  2650.             pal[i]= y + (u<<8) + (v<<16);

  2651.         }

  2652.         src2[1]= (uint8_t*)pal;

  2653.     }

  2654. 

  2655.     // copy strides, so they can safely be modified

  2656.     if (c->sliceDir == 1) {

  2657.         // slices go from top to bottom

  2658.         int srcStride2[4]= {srcStride[0], srcStride[1], srcStride[2]};

  2659.         int dstStride2[4]= {dstStride[0], dstStride[1], dstStride[2]};

  2660.         return c->swScale(c, src2, srcStride2, srcSliceY, srcSliceH, dst, dstStride2);

  2661.     } else {

  2662.         // slices go from bottom to top => we flip the image internally

  2663.         uint8_t* dst2[4]= {dst[0] + (c->dstH-1)*dstStride[0],

  2664.                            dst[1] + ((c->dstH>>c->chrDstVSubSample)-1)*dstStride[1],

  2665.                            dst[2] + ((c->dstH>>c->chrDstVSubSample)-1)*dstStride[2]};

  2666.         int srcStride2[4]= {-srcStride[0], -srcStride[1], -srcStride[2]};

  2667.         int dstStride2[4]= {-dstStride[0], -dstStride[1], -dstStride[2]};

  2668. 

  2669.         src2[0] += (srcSliceH-1)*srcStride[0];

  2670.         if (!use_pal)

  2671.             src2[1] += ((srcSliceH>>c->chrSrcVSubSample)-1)*srcStride[1];

  2672.         src2[2] += ((srcSliceH>>c->chrSrcVSubSample)-1)*srcStride[2];

  2673. 

  2674.         return c->swScale(c, src2, srcStride2, c->srcH-srcSliceY-srcSliceH, srcSliceH, dst2, dstStride2);

  2675.     }

  2676. }

  2677. 

  2678. /**

  2679.  * swscale wrapper, so we don't need to export the SwsContext

  2680.  */

  2681. int sws_scale_ordered(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  2682.                       int srcSliceH, uint8_t* dst[], int dstStride[]){

  2683.     return sws_scale(c, src, srcStride, srcSliceY, srcSliceH, dst, dstStride);

  2684. }

  2685. 

  2686. SwsFilter *sws_getDefaultFilter(float lumaGBlur, float chromaGBlur,

  2687.                                 float lumaSharpen, float chromaSharpen,

  2688.                                 float chromaHShift, float chromaVShift,

  2689.                                 int verbose)

  2690. {

  2691.     SwsFilter *filter= av_malloc(sizeof(SwsFilter));

  2692. 

  2693.     if (lumaGBlur!=0.0){

  2694.         filter->lumH= sws_getGaussianVec(lumaGBlur, 3.0);

  2695.         filter->lumV= sws_getGaussianVec(lumaGBlur, 3.0);

  2696.     }else{

  2697.         filter->lumH= sws_getIdentityVec();

  2698.         filter->lumV= sws_getIdentityVec();

  2699.     }

  2700. 

  2701.     if (chromaGBlur!=0.0){

  2702.         filter->chrH= sws_getGaussianVec(chromaGBlur, 3.0);

  2703.         filter->chrV= sws_getGaussianVec(chromaGBlur, 3.0);

  2704.     }else{

  2705.         filter->chrH= sws_getIdentityVec();

  2706.         filter->chrV= sws_getIdentityVec();

  2707.     }

  2708. 

  2709.     if (chromaSharpen!=0.0){

  2710.         SwsVector *id= sws_getIdentityVec();

  2711.         sws_scaleVec(filter->chrH, -chromaSharpen);

  2712.         sws_scaleVec(filter->chrV, -chromaSharpen);

  2713.         sws_addVec(filter->chrH, id);

  2714.         sws_addVec(filter->chrV, id);

  2715.         sws_freeVec(id);

  2716.     }

  2717. 

  2718.     if (lumaSharpen!=0.0){

  2719.         SwsVector *id= sws_getIdentityVec();

  2720.         sws_scaleVec(filter->lumH, -lumaSharpen);

  2721.         sws_scaleVec(filter->lumV, -lumaSharpen);

  2722.         sws_addVec(filter->lumH, id);

  2723.         sws_addVec(filter->lumV, id);

  2724.         sws_freeVec(id);

  2725.     }

  2726. 

  2727.     if (chromaHShift != 0.0)

  2728.         sws_shiftVec(filter->chrH, (int)(chromaHShift+0.5));

  2729. 

  2730.     if (chromaVShift != 0.0)

  2731.         sws_shiftVec(filter->chrV, (int)(chromaVShift+0.5));

  2732. 

  2733.     sws_normalizeVec(filter->chrH, 1.0);

  2734.     sws_normalizeVec(filter->chrV, 1.0);

  2735.     sws_normalizeVec(filter->lumH, 1.0);

  2736.     sws_normalizeVec(filter->lumV, 1.0);

  2737. 

  2738.     if (verbose) sws_printVec(filter->chrH);

  2739.     if (verbose) sws_printVec(filter->lumH);

  2740. 

  2741.     return filter;

  2742. }

  2743. 

  2744. /**

  2745.  * returns a normalized gaussian curve used to filter stuff

  2746.  * quality=3 is high quality, lowwer is lowwer quality

  2747.  */

  2748. SwsVector *sws_getGaussianVec(double variance, double quality){

  2749.     const int length= (int)(variance*quality + 0.5) | 1;

  2750.     int i;

  2751.     double *coeff= av_malloc(length*sizeof(double));

  2752.     double middle= (length-1)*0.5;

  2753.     SwsVector *vec= av_malloc(sizeof(SwsVector));

  2754. 

  2755.     vec->coeff= coeff;

  2756.     vec->length= length;

  2757. 

  2758.     for (i=0; i<length; i++)

  2759.     {

  2760.         double dist= i-middle;

  2761.         coeff[i]= exp(-dist*dist/(2*variance*variance)) / sqrt(2*variance*PI);

  2762.     }

  2763. 

  2764.     sws_normalizeVec(vec, 1.0);

  2765. 

  2766.     return vec;

  2767. }

  2768. 

  2769. SwsVector *sws_getConstVec(double c, int length){

  2770.     int i;

  2771.     double *coeff= av_malloc(length*sizeof(double));

  2772.     SwsVector *vec= av_malloc(sizeof(SwsVector));

  2773. 

  2774.     vec->coeff= coeff;

  2775.     vec->length= length;

  2776. 

  2777.     for (i=0; i<length; i++)

  2778.         coeff[i]= c;

  2779. 

  2780.     return vec;

  2781. }

  2782. 

  2783. 

  2784. SwsVector *sws_getIdentityVec(void){

  2785.     return sws_getConstVec(1.0, 1);

  2786. }

  2787. 

  2788. double sws_dcVec(SwsVector *a){

  2789.     int i;

  2790.     double sum=0;

  2791. 

  2792.     for (i=0; i<a->length; i++)

  2793.         sum+= a->coeff[i];

  2794. 

  2795.     return sum;

  2796. }

  2797. 

  2798. void sws_scaleVec(SwsVector *a, double scalar){

  2799.     int i;

  2800. 

  2801.     for (i=0; i<a->length; i++)

  2802.         a->coeff[i]*= scalar;

  2803. }

  2804. 

  2805. void sws_normalizeVec(SwsVector *a, double height){

  2806.     sws_scaleVec(a, height/sws_dcVec(a));

  2807. }

  2808. 

  2809. static SwsVector *sws_getConvVec(SwsVector *a, SwsVector *b){

  2810.     int length= a->length + b->length - 1;

  2811.     double *coeff= av_malloc(length*sizeof(double));

  2812.     int i, j;

  2813.     SwsVector *vec= av_malloc(sizeof(SwsVector));

  2814. 

  2815.     vec->coeff= coeff;

  2816.     vec->length= length;

  2817. 

  2818.     for (i=0; i<length; i++) coeff[i]= 0.0;

  2819. 

  2820.     for (i=0; i<a->length; i++)

  2821.     {

  2822.         for (j=0; j<b->length; j++)

  2823.         {

  2824.             coeff[i+j]+= a->coeff[i]*b->coeff[j];

  2825.         }

  2826.     }

  2827. 

  2828.     return vec;

  2829. }

  2830. 

  2831. static SwsVector *sws_sumVec(SwsVector *a, SwsVector *b){

  2832.     int length= FFMAX(a->length, b->length);

  2833.     double *coeff= av_malloc(length*sizeof(double));

  2834.     int i;

  2835.     SwsVector *vec= av_malloc(sizeof(SwsVector));

  2836. 

  2837.     vec->coeff= coeff;

  2838.     vec->length= length;

  2839. 

  2840.     for (i=0; i<length; i++) coeff[i]= 0.0;

  2841. 

  2842.     for (i=0; i<a->length; i++) coeff[i + (length-1)/2 - (a->length-1)/2]+= a->coeff[i];

  2843.     for (i=0; i<b->length; i++) coeff[i + (length-1)/2 - (b->length-1)/2]+= b->coeff[i];

  2844. 

  2845.     return vec;

  2846. }

  2847. 

  2848. static SwsVector *sws_diffVec(SwsVector *a, SwsVector *b){

  2849.     int length= FFMAX(a->length, b->length);

  2850.     double *coeff= av_malloc(length*sizeof(double));

  2851.     int i;

  2852.     SwsVector *vec= av_malloc(sizeof(SwsVector));

  2853. 

  2854.     vec->coeff= coeff;

  2855.     vec->length= length;

  2856. 

  2857.     for (i=0; i<length; i++) coeff[i]= 0.0;

  2858. 

  2859.     for (i=0; i<a->length; i++) coeff[i + (length-1)/2 - (a->length-1)/2]+= a->coeff[i];

  2860.     for (i=0; i<b->length; i++) coeff[i + (length-1)/2 - (b->length-1)/2]-= b->coeff[i];

  2861. 

  2862.     return vec;

  2863. }

  2864. 

  2865. /* shift left / or right if "shift" is negative */

  2866. static SwsVector *sws_getShiftedVec(SwsVector *a, int shift){

  2867.     int length= a->length + FFABS(shift)*2;

  2868.     double *coeff= av_malloc(length*sizeof(double));

  2869.     int i;

  2870.     SwsVector *vec= av_malloc(sizeof(SwsVector));

  2871. 

  2872.     vec->coeff= coeff;

  2873.     vec->length= length;

  2874. 

  2875.     for (i=0; i<length; i++) coeff[i]= 0.0;

  2876. 

  2877.     for (i=0; i<a->length; i++)

  2878.     {

  2879.         coeff[i + (length-1)/2 - (a->length-1)/2 - shift]= a->coeff[i];

  2880.     }

  2881. 

  2882.     return vec;

  2883. }

  2884. 

  2885. void sws_shiftVec(SwsVector *a, int shift){

  2886.     SwsVector *shifted= sws_getShiftedVec(a, shift);

  2887.     av_free(a->coeff);

  2888.     a->coeff= shifted->coeff;

  2889.     a->length= shifted->length;

  2890.     av_free(shifted);

  2891. }

  2892. 

  2893. void sws_addVec(SwsVector *a, SwsVector *b){

  2894.     SwsVector *sum= sws_sumVec(a, b);

  2895.     av_free(a->coeff);

  2896.     a->coeff= sum->coeff;

  2897.     a->length= sum->length;

  2898.     av_free(sum);

  2899. }

  2900. 

  2901. void sws_subVec(SwsVector *a, SwsVector *b){

  2902.     SwsVector *diff= sws_diffVec(a, b);

  2903.     av_free(a->coeff);

  2904.     a->coeff= diff->coeff;

  2905.     a->length= diff->length;

  2906.     av_free(diff);

  2907. }

  2908. 

  2909. void sws_convVec(SwsVector *a, SwsVector *b){

  2910.     SwsVector *conv= sws_getConvVec(a, b);

  2911.     av_free(a->coeff);

  2912.     a->coeff= conv->coeff;

  2913.     a->length= conv->length;

  2914.     av_free(conv);

  2915. }

  2916. 

  2917. SwsVector *sws_cloneVec(SwsVector *a){

  2918.     double *coeff= av_malloc(a->length*sizeof(double));

  2919.     int i;

  2920.     SwsVector *vec= av_malloc(sizeof(SwsVector));

  2921. 

  2922.     vec->coeff= coeff;

  2923.     vec->length= a->length;

  2924. 

  2925.     for (i=0; i<a->length; i++) coeff[i]= a->coeff[i];

  2926. 

  2927.     return vec;

  2928. }

  2929. 

  2930. void sws_printVec(SwsVector *a){

  2931.     int i;

  2932.     double max=0;

  2933.     double min=0;

  2934.     double range;

  2935. 

  2936.     for (i=0; i<a->length; i++)

  2937.         if (a->coeff[i]>max) max= a->coeff[i];

  2938. 

  2939.     for (i=0; i<a->length; i++)

  2940.         if (a->coeff[i]<min) min= a->coeff[i];

  2941. 

  2942.     range= max - min;

  2943. 

  2944.     for (i=0; i<a->length; i++)

  2945.     {

  2946.         int x= (int)((a->coeff[i]-min)*60.0/range +0.5);

  2947.         av_log(NULL, AV_LOG_DEBUG, "%1.3f ", a->coeff[i]);

  2948.         for (;x>0; x--) av_log(NULL, AV_LOG_DEBUG, " ");

  2949.         av_log(NULL, AV_LOG_DEBUG, "|\n");

  2950.     }

  2951. }

  2952. 

  2953. void sws_freeVec(SwsVector *a){

  2954.     if (!a) return;

  2955.     av_freep(&a->coeff);

  2956.     a->length=0;

  2957.     av_free(a);

  2958. }

  2959. 

  2960. void sws_freeFilter(SwsFilter *filter){

  2961.     if (!filter) return;

  2962. 

  2963.     if (filter->lumH) sws_freeVec(filter->lumH);

  2964.     if (filter->lumV) sws_freeVec(filter->lumV);

  2965.     if (filter->chrH) sws_freeVec(filter->chrH);

  2966.     if (filter->chrV) sws_freeVec(filter->chrV);

  2967.     av_free(filter);

  2968. }

  2969. 

  2970. 

  2971. void sws_freeContext(SwsContext *c){

  2972.     int i;

  2973.     if (!c) return;

  2974. 

  2975.     if (c->lumPixBuf)

  2976.     {

  2977.         for (i=0; i<c->vLumBufSize; i++)

  2978.             av_freep(&c->lumPixBuf[i]);

  2979.         av_freep(&c->lumPixBuf);

  2980.     }

  2981. 

  2982.     if (c->chrPixBuf)

  2983.     {

  2984.         for (i=0; i<c->vChrBufSize; i++)

  2985.             av_freep(&c->chrPixBuf[i]);

  2986.         av_freep(&c->chrPixBuf);

  2987.     }

  2988. 

  2989.     av_freep(&c->vLumFilter);

  2990.     av_freep(&c->vChrFilter);

  2991.     av_freep(&c->hLumFilter);

  2992.     av_freep(&c->hChrFilter);

  2993. #ifdef HAVE_ALTIVEC

  2994.     av_freep(&c->vYCoeffsBank);

  2995.     av_freep(&c->vCCoeffsBank);

  2996. #endif

  2997. 

  2998.     av_freep(&c->vLumFilterPos);

  2999.     av_freep(&c->vChrFilterPos);

  3000.     av_freep(&c->hLumFilterPos);

  3001.     av_freep(&c->hChrFilterPos);

  3002. 

  3003. #if defined(ARCH_X86) && defined(CONFIG_GPL)

  3004. #ifdef MAP_ANONYMOUS

  3005.     if (c->funnyYCode) munmap(c->funnyYCode, MAX_FUNNY_CODE_SIZE);

  3006.     if (c->funnyUVCode) munmap(c->funnyUVCode, MAX_FUNNY_CODE_SIZE);

  3007. #else

  3008.     av_free(c->funnyYCode);

  3009.     av_free(c->funnyUVCode);

  3010. #endif

  3011.     c->funnyYCode=NULL;

  3012.     c->funnyUVCode=NULL;

  3013. #endif /* defined(ARCH_X86) */

  3014. 

  3015.     av_freep(&c->lumMmx2Filter);

  3016.     av_freep(&c->chrMmx2Filter);

  3017.     av_freep(&c->lumMmx2FilterPos);

  3018.     av_freep(&c->chrMmx2FilterPos);

  3019.     av_freep(&c->yuvTable);

  3020. 

  3021.     av_free(c);

  3022. }

  3023. 

  3024. /**

  3025.  * Checks if context is valid or reallocs a new one instead.

  3026.  * If context is NULL, just calls sws_getContext() to get a new one.

  3027.  * Otherwise, checks if the parameters are the same already saved in context.

  3028.  * If that is the case, returns the current context.

  3029.  * Otherwise, frees context and gets a new one.

  3030.  *

  3031.  * Be warned that srcFilter, dstFilter are not checked, they are

  3032.  * asumed to remain valid.

  3033.  */

  3034. struct SwsContext *sws_getCachedContext(struct SwsContext *context,

  3035.                                         int srcW, int srcH, int srcFormat,

  3036.                                         int dstW, int dstH, int dstFormat, int flags,

  3037.                                         SwsFilter *srcFilter, SwsFilter *dstFilter, double *param)

  3038. {

  3039.     static const double default_param[2] = {SWS_PARAM_DEFAULT, SWS_PARAM_DEFAULT};

  3040. 

  3041.     if (!param)

  3042.         param = default_param;

  3043. 

  3044.     if (context) {

  3045.         if (context->srcW != srcW || context->srcH != srcH ||

  3046.             context->srcFormat != srcFormat ||

  3047.             context->dstW != dstW || context->dstH != dstH ||

  3048.             context->dstFormat != dstFormat || context->flags != flags ||

  3049.             context->param[0] != param[0] || context->param[1] != param[1])

  3050.         {

  3051.             sws_freeContext(context);

  3052.             context = NULL;

  3053.         }

  3054.     }

  3055.     if (!context) {

  3056.         return sws_getContext(srcW, srcH, srcFormat,

  3057.                               dstW, dstH, dstFormat, flags,

  3058.                               srcFilter, dstFilter, param);

  3059.     }

  3060.     return context;

  3061. }