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FFmpeg/libswscale/swscale.c

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  1. /*

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

  3.  *

  4.  * This file is part of FFmpeg.

  5.  *

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

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

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

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

  10.  *

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

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

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

  14.  * GNU General Public License for more details.

  15.  *

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

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

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

  19.  *

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

  21.  * under the LGPL license too

  22.  */

  23. 

  24. /*

  25.   supported Input formats: YV12, I420/IYUV, YUY2, UYVY, BGR32, BGR24, BGR16, BGR15, RGB32, RGB24, Y8/Y800, YVU9/IF09, PAL8

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

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

  28. 

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

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

  31.   x -> x

  32.   YUV9 -> YV12

  33.   YUV9/YV12 -> Y800

  34.   Y800 -> YUV9/YV12

  35.   BGR24 -> BGR32 & RGB24 -> RGB32

  36.   BGR32 -> BGR24 & RGB32 -> RGB24

  37.   BGR15 -> BGR16

  38. */

  39. 

  40. /*

  41. tested special converters (most are tested actually, but I did not write it down ...)

  42.  YV12 -> BGR16

  43.  YV12 -> YV12

  44.  BGR15 -> BGR16

  45.  BGR16 -> BGR16

  46.  YVU9 -> YV12

  47. 

  48. untested special converters

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

  50.   YV12/I420 -> YV12/I420

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

  52.   BGR24 -> BGR32 & RGB24 -> RGB32

  53.   BGR32 -> BGR24 & RGB32 -> RGB24

  54.   BGR24 -> YV12

  55. */

  56. 

  57. #include <inttypes.h>

  58. #include <string.h>

  59. #include <math.h>

  60. #include <stdio.h>

  61. #include <unistd.h>

  62. #include "config.h"

  63. #include <assert.h>

  64. #ifdef HAVE_SYS_MMAN_H

  65. #include <sys/mman.h>

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

  67. #define MAP_ANONYMOUS MAP_ANON

  68. #endif

  69. #endif

  70. #include "swscale.h"

  71. #include "swscale_internal.h"

  72. #include "rgb2rgb.h"

  73. #include "libavutil/x86_cpu.h"

  74. #include "libavutil/bswap.h"

  75. 

  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_BGR24       \

  108.         || (x)==PIX_FMT_BGR565      \

  109.         || (x)==PIX_FMT_BGR555      \

  110.         || (x)==PIX_FMT_BGR32       \

  111.         || (x)==PIX_FMT_RGB24       \

  112.         || (x)==PIX_FMT_RGB565      \

  113.         || (x)==PIX_FMT_RGB555      \

  114.         || (x)==PIX_FMT_GRAY8       \

  115.         || (x)==PIX_FMT_YUV410P     \

  116.         || (x)==PIX_FMT_GRAY16BE    \

  117.         || (x)==PIX_FMT_GRAY16LE    \

  118.         || (x)==PIX_FMT_YUV444P     \

  119.         || (x)==PIX_FMT_YUV422P     \

  120.         || (x)==PIX_FMT_YUV411P     \

  121.         || (x)==PIX_FMT_PAL8        \

  122.         || (x)==PIX_FMT_BGR8        \

  123.         || (x)==PIX_FMT_RGB8        \

  124.         || (x)==PIX_FMT_BGR4_BYTE   \

  125.         || (x)==PIX_FMT_RGB4_BYTE   \

  126.         || (x)==PIX_FMT_YUV440P     \

  127.     )

  128. #define isSupportedOut(x)   (       \

  129.            (x)==PIX_FMT_YUV420P     \

  130.         || (x)==PIX_FMT_YUYV422     \

  131.         || (x)==PIX_FMT_UYVY422     \

  132.         || (x)==PIX_FMT_YUV444P     \

  133.         || (x)==PIX_FMT_YUV422P     \

  134.         || (x)==PIX_FMT_YUV411P     \

  135.         || isRGB(x)                 \

  136.         || isBGR(x)                 \

  137.         || (x)==PIX_FMT_NV12        \

  138.         || (x)==PIX_FMT_NV21        \

  139.         || (x)==PIX_FMT_GRAY16BE    \

  140.         || (x)==PIX_FMT_GRAY16LE    \

  141.         || (x)==PIX_FMT_GRAY8       \

  142.         || (x)==PIX_FMT_YUV410P     \

  143.     )

  144. #define isPacked(x)         (       \

  145.            (x)==PIX_FMT_PAL8        \

  146.         || (x)==PIX_FMT_YUYV422     \

  147.         || (x)==PIX_FMT_UYVY422     \

  148.         || isRGB(x)                 \

  149.         || isBGR(x)                 \

  150.     )

  151. 

  152. #define RGB2YUV_SHIFT 16

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

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

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

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

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

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

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

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

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

  162. 

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

  164. 

  165. /*

  166. NOTES

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

  168. 

  169. TODO

  170. more intelligent misalignment avoidance for the horizontal scaler

  171. write special vertical cubic upscale version

  172. Optimize C code (yv12 / minmax)

  173. add support for packed pixel yuv input & output

  174. add support for Y8 output

  175. optimize bgr24 & bgr32

  176. add BGR4 output support

  177. write special BGR->BGR scaler

  178. */

  179. 

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

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

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

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

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

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

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

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

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

  189. 

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

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

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

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

  194. 

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

  196.         0x0103010301030103LL,

  197.         0x0200020002000200LL,};

  198. 

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

  200.         0x0602060206020602LL,

  201.         0x0004000400040004LL,};

  202. 

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

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

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

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

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

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

  209. 

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

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

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

  213. 

  214. #ifdef FAST_BGR2YV12

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

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

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

  218. #else

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

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

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

  222. #endif /* FAST_BGR2YV12 */

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

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

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

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

  227. 

  228. // clipping helper table for C implementations:

  229. static unsigned char clip_table[768];

  230. 

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

  232. 

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

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

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

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

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

  238. 

  239. const char *sws_format_name(enum PixelFormat format)

  240. {

  241.     switch (format) {

  242.         case PIX_FMT_YUV420P:

  243.             return "yuv420p";

  244.         case PIX_FMT_YUVA420P:

  245.             return "yuva420p";

  246.         case PIX_FMT_YUYV422:

  247.             return "yuyv422";

  248.         case PIX_FMT_RGB24:

  249.             return "rgb24";

  250.         case PIX_FMT_BGR24:

  251.             return "bgr24";

  252.         case PIX_FMT_YUV422P:

  253.             return "yuv422p";

  254.         case PIX_FMT_YUV444P:

  255.             return "yuv444p";

  256.         case PIX_FMT_RGB32:

  257.             return "rgb32";

  258.         case PIX_FMT_YUV410P:

  259.             return "yuv410p";

  260.         case PIX_FMT_YUV411P:

  261.             return "yuv411p";

  262.         case PIX_FMT_RGB565:

  263.             return "rgb565";

  264.         case PIX_FMT_RGB555:

  265.             return "rgb555";

  266.         case PIX_FMT_GRAY16BE:

  267.             return "gray16be";

  268.         case PIX_FMT_GRAY16LE:

  269.             return "gray16le";

  270.         case PIX_FMT_GRAY8:

  271.             return "gray8";

  272.         case PIX_FMT_MONOWHITE:

  273.             return "mono white";

  274.         case PIX_FMT_MONOBLACK:

  275.             return "mono black";

  276.         case PIX_FMT_PAL8:

  277.             return "Palette";

  278.         case PIX_FMT_YUVJ420P:

  279.             return "yuvj420p";

  280.         case PIX_FMT_YUVJ422P:

  281.             return "yuvj422p";

  282.         case PIX_FMT_YUVJ444P:

  283.             return "yuvj444p";

  284.         case PIX_FMT_XVMC_MPEG2_MC:

  285.             return "xvmc_mpeg2_mc";

  286.         case PIX_FMT_XVMC_MPEG2_IDCT:

  287.             return "xvmc_mpeg2_idct";

  288.         case PIX_FMT_UYVY422:

  289.             return "uyvy422";

  290.         case PIX_FMT_UYYVYY411:

  291.             return "uyyvyy411";

  292.         case PIX_FMT_RGB32_1:

  293.             return "rgb32x";

  294.         case PIX_FMT_BGR32_1:

  295.             return "bgr32x";

  296.         case PIX_FMT_BGR32:

  297.             return "bgr32";

  298.         case PIX_FMT_BGR565:

  299.             return "bgr565";

  300.         case PIX_FMT_BGR555:

  301.             return "bgr555";

  302.         case PIX_FMT_BGR8:

  303.             return "bgr8";

  304.         case PIX_FMT_BGR4:

  305.             return "bgr4";

  306.         case PIX_FMT_BGR4_BYTE:

  307.             return "bgr4 byte";

  308.         case PIX_FMT_RGB8:

  309.             return "rgb8";

  310.         case PIX_FMT_RGB4:

  311.             return "rgb4";

  312.         case PIX_FMT_RGB4_BYTE:

  313.             return "rgb4 byte";

  314.         case PIX_FMT_NV12:

  315.             return "nv12";

  316.         case PIX_FMT_NV21:

  317.             return "nv21";

  318.         case PIX_FMT_YUV440P:

  319.             return "yuv440p";

  320.         default:

  321.             return "Unknown format";

  322.     }

  323. }

  324. 

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

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

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

  328. {

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

  330.     int i;

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

  332.     {

  333.         int val=1<<18;

  334.         int j;

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

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

  337. 

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

  339.     }

  340. 

  341.     if (uDest)

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

  343.         {

  344.             int u=1<<18;

  345.             int v=1<<18;

  346.             int j;

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

  348.             {

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

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

  351.             }

  352. 

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

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

  355.         }

  356. }

  357. 

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

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

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

  361. {

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

  363.     int i;

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

  365.     {

  366.         int val=1<<18;

  367.         int j;

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

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

  370. 

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

  372.     }

  373. 

  374.     if (!uDest)

  375.         return;

  376. 

  377.     if (dstFormat == PIX_FMT_NV12)

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

  379.         {

  380.             int u=1<<18;

  381.             int v=1<<18;

  382.             int j;

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

  384.             {

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

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

  387.             }

  388. 

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

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

  391.         }

  392.     else

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

  394.         {

  395.             int u=1<<18;

  396.             int v=1<<18;

  397.             int j;

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

  399.             {

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

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

  402.             }

  403. 

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

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

  406.         }

  407. }

  408. 

  409. #define YSCALE_YUV_2_PACKEDX_C(type) \

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

  411.         int j;\

  412.         int Y1 = 1<<18;\

  413.         int Y2 = 1<<18;\

  414.         int U  = 1<<18;\

  415.         int V  = 1<<18;\

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

  417.         const int i2= 2*i;\

  418.         \

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

  420.         {\

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

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

  423.         }\

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

  425.         {\

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

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

  428.         }\

  429.         Y1>>=19;\

  430.         Y2>>=19;\

  431.         U >>=19;\

  432.         V >>=19;\

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

  434.         {\

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

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

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

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

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

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

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

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

  443.         }

  444. 

  445. #define YSCALE_YUV_2_RGBX_C(type) \

  446.     YSCALE_YUV_2_PACKEDX_C(type)  \

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

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

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

  450. 

  451. #define YSCALE_YUV_2_PACKED2_C   \

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

  453.         const int i2= 2*i;       \

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

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

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

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

  458. 

  459. #define YSCALE_YUV_2_RGB2_C(type) \

  460.     YSCALE_YUV_2_PACKED2_C\

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

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

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

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

  465. 

  466. #define YSCALE_YUV_2_PACKED1_C \

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

  468.         const int i2= 2*i;\

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

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

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

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

  473. 

  474. #define YSCALE_YUV_2_RGB1_C(type) \

  475.     YSCALE_YUV_2_PACKED1_C\

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

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

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

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

  480. 

  481. #define YSCALE_YUV_2_PACKED1B_C \

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

  483.         const int i2= 2*i;\

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

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

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

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

  488. 

  489. #define YSCALE_YUV_2_RGB1B_C(type) \

  490.     YSCALE_YUV_2_PACKED1B_C\

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

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

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

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

  495. 

  496. #define YSCALE_YUV_2_ANYRGB_C(func, func2)\

  497.     switch(c->dstFormat)\

  498.     {\

  499.     case PIX_FMT_RGB32:\

  500.     case PIX_FMT_BGR32:\

  501.         func(uint32_t)\

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

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

  504.         }                \

  505.         break;\

  506.     case PIX_FMT_RGB24:\

  507.         func(uint8_t)\

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

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

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

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

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

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

  514.             dest+=6;\

  515.         }\

  516.         break;\

  517.     case PIX_FMT_BGR24:\

  518.         func(uint8_t)\

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

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

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

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

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

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

  525.             dest+=6;\

  526.         }\

  527.         break;\

  528.     case PIX_FMT_RGB565:\

  529.     case PIX_FMT_BGR565:\

  530.         {\

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

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

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

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

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

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

  537.             func(uint16_t)\

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

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

  540.             }\

  541.         }\

  542.         break;\

  543.     case PIX_FMT_RGB555:\

  544.     case PIX_FMT_BGR555:\

  545.         {\

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

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

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

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

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

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

  552.             func(uint16_t)\

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

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

  555.             }\

  556.         }\

  557.         break;\

  558.     case PIX_FMT_RGB8:\

  559.     case PIX_FMT_BGR8:\

  560.         {\

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

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

  563.             func(uint8_t)\

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

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

  566.             }\

  567.         }\

  568.         break;\

  569.     case PIX_FMT_RGB4:\

  570.     case PIX_FMT_BGR4:\

  571.         {\

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

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

  574.             func(uint8_t)\

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

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

  577.             }\

  578.         }\

  579.         break;\

  580.     case PIX_FMT_RGB4_BYTE:\

  581.     case PIX_FMT_BGR4_BYTE:\

  582.         {\

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

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

  585.             func(uint8_t)\

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

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

  588.             }\

  589.         }\

  590.         break;\

  591.     case PIX_FMT_MONOBLACK:\

  592.         {\

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

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

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

  596.                 int acc;\

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

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

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

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

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

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

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

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

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

  606.                 dest++;\

  607.             }\

  608. \

  609. /*\

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

  611. {\

  612.             int acc=0;\

  613.             int left=0;\

  614.             static int top[1024];\

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

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

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

  618.             int topLeft=0;\

  619.             int shift=0;\

  620.             int count=0;\

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

  622.             int error_new=0;\

  623.             int error_in3=0;\

  624.             int f=0;\

  625.             \

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

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

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

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

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

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

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

  633. \

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

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

  636.                 f= error_new - error_in3*4;\

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

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

  639. \

  640.                 topLeft= top[i];\

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

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

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

  644. \

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

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

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

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

  649.                 }\

  650.             }\

  651. }\

  652. */\

  653.         }\

  654.         break;\

  655.     case PIX_FMT_YUYV422:\

  656.         func2\

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

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

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

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

  661.         }                \

  662.         break;\

  663.     case PIX_FMT_UYVY422:\

  664.         func2\

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

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

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

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

  669.         }                \

  670.         break;\

  671.     }\

  672. 

  673. 

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

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

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

  677. {

  678.     int i;

  679.     switch(c->dstFormat)

  680.     {

  681.     case PIX_FMT_BGR32:

  682.     case PIX_FMT_RGB32:

  683.         YSCALE_YUV_2_RGBX_C(uint32_t)

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

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

  686.         }

  687.         break;

  688.     case PIX_FMT_RGB24:

  689.         YSCALE_YUV_2_RGBX_C(uint8_t)

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

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

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

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

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

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

  696.             dest+=6;

  697.         }

  698.         break;

  699.     case PIX_FMT_BGR24:

  700.         YSCALE_YUV_2_RGBX_C(uint8_t)

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

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

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

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

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

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

  707.             dest+=6;

  708.         }

  709.         break;

  710.     case PIX_FMT_RGB565:

  711.     case PIX_FMT_BGR565:

  712.         {

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

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

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

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

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

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

  719.             YSCALE_YUV_2_RGBX_C(uint16_t)

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

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

  722.             }

  723.         }

  724.         break;

  725.     case PIX_FMT_RGB555:

  726.     case PIX_FMT_BGR555:

  727.         {

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

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

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

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

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

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

  734.             YSCALE_YUV_2_RGBX_C(uint16_t)

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

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

  737.             }

  738.         }

  739.         break;

  740.     case PIX_FMT_RGB8:

  741.     case PIX_FMT_BGR8:

  742.         {

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

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

  745.             YSCALE_YUV_2_RGBX_C(uint8_t)

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

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

  748.             }

  749.         }

  750.         break;

  751.     case PIX_FMT_RGB4:

  752.     case PIX_FMT_BGR4:

  753.         {

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

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

  756.             YSCALE_YUV_2_RGBX_C(uint8_t)

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

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

  759.             }

  760.         }

  761.         break;

  762.     case PIX_FMT_RGB4_BYTE:

  763.     case PIX_FMT_BGR4_BYTE:

  764.         {

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

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

  767.             YSCALE_YUV_2_RGBX_C(uint8_t)

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

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

  770.             }

  771.         }

  772.         break;

  773.     case PIX_FMT_MONOBLACK:

  774.         {

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

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

  777.             int acc=0;

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

  779.                 int j;

  780.                 int Y1=1<<18;

  781.                 int Y2=1<<18;

  782. 

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

  784.                 {

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

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

  787.                 }

  788.                 Y1>>=19;

  789.                 Y2>>=19;

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

  791.                 {

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

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

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

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

  796.                 }

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

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

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

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

  801.                     dest++;

  802.                 }

  803.             }

  804.         }

  805.         break;

  806.     case PIX_FMT_YUYV422:

  807.         YSCALE_YUV_2_PACKEDX_C(void)

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

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

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

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

  812.         }

  813.         break;

  814.     case PIX_FMT_UYVY422:

  815.         YSCALE_YUV_2_PACKEDX_C(void)

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

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

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

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

  820.         }

  821.         break;

  822.     }

  823. }

  824. 

  825. 

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

  827. //Plain C versions

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

  829. #define COMPILE_C

  830. #endif

  831. 

  832. #ifdef ARCH_POWERPC

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

  834. #define COMPILE_ALTIVEC

  835. #endif //HAVE_ALTIVEC

  836. #endif //ARCH_POWERPC

  837. 

  838. #if defined(ARCH_X86)

  839. 

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

  841. #define COMPILE_MMX

  842. #endif

  843. 

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

  845. #define COMPILE_MMX2

  846. #endif

  847. 

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

  849. #define COMPILE_3DNOW

  850. #endif

  851. #endif //ARCH_X86 || ARCH_X86_64

  852. 

  853. #undef HAVE_MMX

  854. #undef HAVE_MMX2

  855. #undef HAVE_3DNOW

  856. 

  857. #ifdef COMPILE_C

  858. #undef HAVE_MMX

  859. #undef HAVE_MMX2

  860. #undef HAVE_3DNOW

  861. #undef HAVE_ALTIVEC

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

  863. #include "swscale_template.c"

  864. #endif

  865. 

  866. #ifdef COMPILE_ALTIVEC

  867. #undef RENAME

  868. #define HAVE_ALTIVEC

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

  870. #include "swscale_template.c"

  871. #endif

  872. 

  873. #if defined(ARCH_X86)

  874. 

  875. //X86 versions

  876. /*

  877. #undef RENAME

  878. #undef HAVE_MMX

  879. #undef HAVE_MMX2

  880. #undef HAVE_3DNOW

  881. #define ARCH_X86

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

  883. #include "swscale_template.c"

  884. */

  885. //MMX versions

  886. #ifdef COMPILE_MMX

  887. #undef RENAME

  888. #define HAVE_MMX

  889. #undef HAVE_MMX2

  890. #undef HAVE_3DNOW

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

  892. #include "swscale_template.c"

  893. #endif

  894. 

  895. //MMX2 versions

  896. #ifdef COMPILE_MMX2

  897. #undef RENAME

  898. #define HAVE_MMX

  899. #define HAVE_MMX2

  900. #undef HAVE_3DNOW

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

  902. #include "swscale_template.c"

  903. #endif

  904. 

  905. //3DNOW versions

  906. #ifdef COMPILE_3DNOW

  907. #undef RENAME

  908. #define HAVE_MMX

  909. #undef HAVE_MMX2

  910. #define HAVE_3DNOW

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

  912. #include "swscale_template.c"

  913. #endif

  914. 

  915. #endif //ARCH_X86 || ARCH_X86_64

  916. 

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

  918. 

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

  920. {

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

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

  923.     else                return getSplineCoeff(        0.0,

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

  925.                                                     c + 3.0*d,

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

  927.                                             dist-1.0);

  928. }

  929. 

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

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

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

  933. {

  934.     int i;

  935.     int filterSize;

  936.     int filter2Size;

  937.     int minFilterSize;

  938.     double *filter=NULL;

  939.     double *filter2=NULL;

  940.     int ret= -1;

  941. #if defined(ARCH_X86)

  942.     if (flags & SWS_CPU_CAPS_MMX)

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

  944. #endif

  945. 

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

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

  948. 

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

  950.     {

  951.         int i;

  952.         filterSize= 1;

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

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

  955. 

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

  957.         {

  958.             filter[i*filterSize]=1;

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

  960.         }

  961. 

  962.     }

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

  964.     {

  965.         int i;

  966.         int xDstInSrc;

  967.         filterSize= 1;

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

  969. 

  970.         xDstInSrc= xInc/2 - 0x8000;

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

  972.         {

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

  974. 

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

  976.             filter[i]= 1.0;

  977.             xDstInSrc+= xInc;

  978.         }

  979.     }

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

  981.     {

  982.         int i;

  983.         int xDstInSrc;

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

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

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

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

  988. 

  989.         xDstInSrc= xInc/2 - 0x8000;

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

  991.         {

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

  993.             int j;

  994. 

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

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

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

  998.                 {

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

  1000.                     double coeff= 1.0 - d;

  1001.                     if (coeff<0) coeff=0;

  1002.                     filter[i*filterSize + j]= coeff;

  1003.                     xx++;

  1004.                 }

  1005.             xDstInSrc+= xInc;

  1006.         }

  1007.     }

  1008.     else

  1009.     {

  1010.         double xDstInSrc;

  1011.         double sizeFactor, filterSizeInSrc;

  1012.         const double xInc1= (double)xInc / (double)(1<<16);

  1013. 

  1014.         if      (flags&SWS_BICUBIC)      sizeFactor=  4.0;

  1015.         else if (flags&SWS_X)            sizeFactor=  8.0;

  1016.         else if (flags&SWS_AREA)         sizeFactor=  1.0; //downscale only, for upscale it is bilinear

  1017.         else if (flags&SWS_GAUSS)        sizeFactor=  8.0;   // infinite ;)

  1018.         else if (flags&SWS_LANCZOS)      sizeFactor= param[0] != SWS_PARAM_DEFAULT ? 2.0*param[0] : 6.0;

  1019.         else if (flags&SWS_SINC)         sizeFactor= 20.0; // infinite ;)

  1020.         else if (flags&SWS_SPLINE)       sizeFactor= 20.0;  // infinite ;)

  1021.         else if (flags&SWS_BILINEAR)     sizeFactor=  2.0;

  1022.         else {

  1023.             sizeFactor= 0.0; //GCC warning killer

  1024.             assert(0);

  1025.         }

  1026. 

  1027.         if (xInc1 <= 1.0)       filterSizeInSrc= sizeFactor; // upscale

  1028.         else                    filterSizeInSrc= sizeFactor*srcW / (double)dstW;

  1029. 

  1030.         filterSize= (int)ceil(1 + filterSizeInSrc); // will be reduced later if possible

  1031.         if (filterSize > srcW-2) filterSize=srcW-2;

  1032. 

  1033.         filter= av_malloc(dstW*sizeof(double)*filterSize);

  1034. 

  1035.         xDstInSrc= xInc1 / 2.0 - 0.5;

  1036.         for (i=0; i<dstW; i++)

  1037.         {

  1038.             int xx= (int)(xDstInSrc - (filterSize-1)*0.5 + 0.5);

  1039.             int j;

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

  1041.             for (j=0; j<filterSize; j++)

  1042.             {

  1043.                 double d= FFABS(xx - xDstInSrc)/filterSizeInSrc*sizeFactor;

  1044.                 double coeff;

  1045.                 if (flags & SWS_BICUBIC)

  1046.                 {

  1047.                     double B= param[0] != SWS_PARAM_DEFAULT ? param[0] : 0.0;

  1048.                     double C= param[1] != SWS_PARAM_DEFAULT ? param[1] : 0.6;

  1049. 

  1050.                     if (d<1.0)

  1051.                         coeff = (12-9*B-6*C)*d*d*d + (-18+12*B+6*C)*d*d + 6-2*B;

  1052.                     else if (d<2.0)

  1053.                         coeff = (-B-6*C)*d*d*d + (6*B+30*C)*d*d + (-12*B-48*C)*d +8*B+24*C;

  1054.                     else

  1055.                         coeff=0.0;

  1056.                 }

  1057. /*                else if (flags & SWS_X)

  1058.                 {

  1059.                     double p= param ? param*0.01 : 0.3;

  1060.                     coeff = d ? sin(d*PI)/(d*PI) : 1.0;

  1061.                     coeff*= pow(2.0, - p*d*d);

  1062.                 }*/

  1063.                 else if (flags & SWS_X)

  1064.                 {

  1065.                     double A= param[0] != SWS_PARAM_DEFAULT ? param[0] : 1.0;

  1066. 

  1067.                     if (d<1.0)

  1068.                         coeff = cos(d*PI);

  1069.                     else

  1070.                         coeff=-1.0;

  1071.                     if (coeff<0.0)      coeff= -pow(-coeff, A);

  1072.                     else                coeff=  pow( coeff, A);

  1073.                     coeff= coeff*0.5 + 0.5;

  1074.                 }

  1075.                 else if (flags & SWS_AREA)

  1076.                 {

  1077.                     double srcPixelSize= 1.0/xInc1;

  1078.                     if      (d + srcPixelSize/2 < 0.5) coeff= 1.0;

  1079.                     else if (d - srcPixelSize/2 < 0.5) coeff= (0.5-d)/srcPixelSize + 0.5;

  1080.                     else coeff=0.0;

  1081.                 }

  1082.                 else if (flags & SWS_GAUSS)

  1083.                 {

  1084.                     double p= param[0] != SWS_PARAM_DEFAULT ? param[0] : 3.0;

  1085.                     coeff = pow(2.0, - p*d*d);

  1086.                 }

  1087.                 else if (flags & SWS_SINC)

  1088.                 {

  1089.                     coeff = d ? sin(d*PI)/(d*PI) : 1.0;

  1090.                 }

  1091.                 else if (flags & SWS_LANCZOS)

  1092.                 {

  1093.                     double p= param[0] != SWS_PARAM_DEFAULT ? param[0] : 3.0;

  1094.                     coeff = d ? sin(d*PI)*sin(d*PI/p)/(d*d*PI*PI/p) : 1.0;

  1095.                     if (d>p) coeff=0;

  1096.                 }

  1097.                 else if (flags & SWS_BILINEAR)

  1098.                 {

  1099.                     coeff= 1.0 - d;

  1100.                     if (coeff<0) coeff=0;

  1101.                 }

  1102.                 else if (flags & SWS_SPLINE)

  1103.                 {

  1104.                     double p=-2.196152422706632;

  1105.                     coeff = getSplineCoeff(1.0, 0.0, p, -p-1.0, d);

  1106.                 }

  1107.                 else {

  1108.                     coeff= 0.0; //GCC warning killer

  1109.                     assert(0);

  1110.                 }

  1111. 

  1112.                 filter[i*filterSize + j]= coeff;

  1113.                 xx++;

  1114.             }

  1115.             xDstInSrc+= xInc1;

  1116.         }

  1117.     }

  1118. 

  1119.     /* apply src & dst Filter to filter -> filter2

  1120.        av_free(filter);

  1121.     */

  1122.     assert(filterSize>0);

  1123.     filter2Size= filterSize;

  1124.     if (srcFilter) filter2Size+= srcFilter->length - 1;

  1125.     if (dstFilter) filter2Size+= dstFilter->length - 1;

  1126.     assert(filter2Size>0);

  1127.     filter2= av_malloc(filter2Size*dstW*sizeof(double));

  1128. 

  1129.     for (i=0; i<dstW; i++)

  1130.     {

  1131.         int j;

  1132.         SwsVector scaleFilter;

  1133.         SwsVector *outVec;

  1134. 

  1135.         scaleFilter.coeff= filter + i*filterSize;

  1136.         scaleFilter.length= filterSize;

  1137. 

  1138.         if (srcFilter) outVec= sws_getConvVec(srcFilter, &scaleFilter);

  1139.         else           outVec= &scaleFilter;

  1140. 

  1141.         assert(outVec->length == filter2Size);

  1142.         //FIXME dstFilter

  1143. 

  1144.         for (j=0; j<outVec->length; j++)

  1145.         {

  1146.             filter2[i*filter2Size + j]= outVec->coeff[j];

  1147.         }

  1148. 

  1149.         (*filterPos)[i]+= (filterSize-1)/2 - (filter2Size-1)/2;

  1150. 

  1151.         if (outVec != &scaleFilter) sws_freeVec(outVec);

  1152.     }

  1153.     av_freep(&filter);

  1154. 

  1155.     /* try to reduce the filter-size (step1 find size and shift left) */

  1156.     // Assume it is near normalized (*0.5 or *2.0 is OK but * 0.001 is not).

  1157.     minFilterSize= 0;

  1158.     for (i=dstW-1; i>=0; i--)

  1159.     {

  1160.         int min= filter2Size;

  1161.         int j;

  1162.         double cutOff=0.0;

  1163. 

  1164.         /* get rid off near zero elements on the left by shifting left */

  1165.         for (j=0; j<filter2Size; j++)

  1166.         {

  1167.             int k;

  1168.             cutOff += FFABS(filter2[i*filter2Size]);

  1169. 

  1170.             if (cutOff > SWS_MAX_REDUCE_CUTOFF) break;

  1171. 

  1172.             /* preserve monotonicity because the core can't handle the filter otherwise */

  1173.             if (i<dstW-1 && (*filterPos)[i] >= (*filterPos)[i+1]) break;

  1174. 

  1175.             // Move filter coeffs left

  1176.             for (k=1; k<filter2Size; k++)

  1177.                 filter2[i*filter2Size + k - 1]= filter2[i*filter2Size + k];

  1178.             filter2[i*filter2Size + k - 1]= 0.0;

  1179.             (*filterPos)[i]++;

  1180.         }

  1181. 

  1182.         cutOff=0.0;

  1183.         /* count near zeros on the right */

  1184.         for (j=filter2Size-1; j>0; j--)

  1185.         {

  1186.             cutOff += FFABS(filter2[i*filter2Size + j]);

  1187. 

  1188.             if (cutOff > SWS_MAX_REDUCE_CUTOFF) break;

  1189.             min--;

  1190.         }

  1191. 

  1192.         if (min>minFilterSize) minFilterSize= min;

  1193.     }

  1194. 

  1195.     if (flags & SWS_CPU_CAPS_ALTIVEC) {

  1196.         // we can handle the special case 4,

  1197.         // so we don't want to go to the full 8

  1198.         if (minFilterSize < 5)

  1199.             filterAlign = 4;

  1200. 

  1201.         // we really don't want to waste our time

  1202.         // doing useless computation, so fall-back on

  1203.         // the scalar C code for very small filter.

  1204.         // vectorizing is worth it only if you have

  1205.         // decent-sized vector.

  1206.         if (minFilterSize < 3)

  1207.             filterAlign = 1;

  1208.     }

  1209. 

  1210.     if (flags & SWS_CPU_CAPS_MMX) {

  1211.         // special case for unscaled vertical filtering

  1212.         if (minFilterSize == 1 && filterAlign == 2)

  1213.             filterAlign= 1;

  1214.     }

  1215. 

  1216.     assert(minFilterSize > 0);

  1217.     filterSize= (minFilterSize +(filterAlign-1)) & (~(filterAlign-1));

  1218.     assert(filterSize > 0);

  1219.     filter= av_malloc(filterSize*dstW*sizeof(double));

  1220.     if (filterSize >= MAX_FILTER_SIZE || !filter)

  1221.         goto error;

  1222.     *outFilterSize= filterSize;

  1223. 

  1224.     if (flags&SWS_PRINT_INFO)

  1225.         av_log(NULL, AV_LOG_VERBOSE, "SwScaler: reducing / aligning filtersize %d -> %d\n", filter2Size, filterSize);

  1226.     /* try to reduce the filter-size (step2 reduce it) */

  1227.     for (i=0; i<dstW; i++)

  1228.     {

  1229.         int j;

  1230. 

  1231.         for (j=0; j<filterSize; j++)

  1232.         {

  1233.             if (j>=filter2Size) filter[i*filterSize + j]= 0.0;

  1234.             else               filter[i*filterSize + j]= filter2[i*filter2Size + j];

  1235.         }

  1236.     }

  1237. 

  1238. 

  1239.     //FIXME try to align filterpos if possible

  1240. 

  1241.     //fix borders

  1242.     for (i=0; i<dstW; i++)

  1243.     {

  1244.         int j;

  1245.         if ((*filterPos)[i] < 0)

  1246.         {

  1247.             // Move filter coeffs left to compensate for filterPos

  1248.             for (j=1; j<filterSize; j++)

  1249.             {

  1250.                 int left= FFMAX(j + (*filterPos)[i], 0);

  1251.                 filter[i*filterSize + left] += filter[i*filterSize + j];

  1252.                 filter[i*filterSize + j]=0;

  1253.             }

  1254.             (*filterPos)[i]= 0;

  1255.         }

  1256. 

  1257.         if ((*filterPos)[i] + filterSize > srcW)

  1258.         {

  1259.             int shift= (*filterPos)[i] + filterSize - srcW;

  1260.             // Move filter coeffs right to compensate for filterPos

  1261.             for (j=filterSize-2; j>=0; j--)

  1262.             {

  1263.                 int right= FFMIN(j + shift, filterSize-1);

  1264.                 filter[i*filterSize +right] += filter[i*filterSize +j];

  1265.                 filter[i*filterSize +j]=0;

  1266.             }

  1267.             (*filterPos)[i]= srcW - filterSize;

  1268.         }

  1269.     }

  1270. 

  1271.     // Note the +1 is for the MMXscaler which reads over the end

  1272.     /* align at 16 for AltiVec (needed by hScale_altivec_real) */

  1273.     *outFilter= av_mallocz(*outFilterSize*(dstW+1)*sizeof(int16_t));

  1274. 

  1275.     /* Normalize & Store in outFilter */

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

  1277.     {

  1278.         int j;

  1279.         double error=0;

  1280.         double sum=0;

  1281.         double scale= one;

  1282. 

  1283.         for (j=0; j<filterSize; j++)

  1284.         {

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

  1286.         }

  1287.         scale/= sum;

  1288.         for (j=0; j<*outFilterSize; j++)

  1289.         {

  1290.             double v= filter[i*filterSize + j]*scale + error;

  1291.             int intV= floor(v + 0.5);

  1292.             (*outFilter)[i*(*outFilterSize) + j]= intV;

  1293.             error = v - intV;

  1294.         }

  1295.     }

  1296. 

  1297.     (*filterPos)[dstW]= (*filterPos)[dstW-1]; // the MMX scaler will read over the end

  1298.     for (i=0; i<*outFilterSize; i++)

  1299.     {

  1300.         int j= dstW*(*outFilterSize);

  1301.         (*outFilter)[j + i]= (*outFilter)[j + i - (*outFilterSize)];

  1302.     }

  1303. 

  1304.     ret=0;

  1305. error:

  1306.     av_free(filter);

  1307.     av_free(filter2);

  1308.     return ret;

  1309. }

  1310. 

  1311. #ifdef COMPILE_MMX2

  1312. static void initMMX2HScaler(int dstW, int xInc, uint8_t *funnyCode, int16_t *filter, int32_t *filterPos, int numSplits)

  1313. {

  1314.     uint8_t *fragmentA;

  1315.     long imm8OfPShufW1A;

  1316.     long imm8OfPShufW2A;

  1317.     long fragmentLengthA;

  1318.     uint8_t *fragmentB;

  1319.     long imm8OfPShufW1B;

  1320.     long imm8OfPShufW2B;

  1321.     long fragmentLengthB;

  1322.     int fragmentPos;

  1323. 

  1324.     int xpos, i;

  1325. 

  1326.     // create an optimized horizontal scaling routine

  1327. 

  1328.     //code fragment

  1329. 

  1330.     asm volatile(

  1331.         "jmp                         9f                 \n\t"

  1332.     // Begin

  1333.         "0:                                             \n\t"

  1334.         "movq    (%%"REG_d", %%"REG_a"), %%mm3          \n\t"

  1335.         "movd    (%%"REG_c", %%"REG_S"), %%mm0          \n\t"

  1336.         "movd   1(%%"REG_c", %%"REG_S"), %%mm1          \n\t"

  1337.         "punpcklbw                %%mm7, %%mm1          \n\t"

  1338.         "punpcklbw                %%mm7, %%mm0          \n\t"

  1339.         "pshufw                   $0xFF, %%mm1, %%mm1   \n\t"

  1340.         "1:                                             \n\t"

  1341.         "pshufw                   $0xFF, %%mm0, %%mm0   \n\t"

  1342.         "2:                                             \n\t"

  1343.         "psubw                    %%mm1, %%mm0          \n\t"

  1344.         "movl   8(%%"REG_b", %%"REG_a"), %%esi          \n\t"

  1345.         "pmullw                   %%mm3, %%mm0          \n\t"

  1346.         "psllw                       $7, %%mm1          \n\t"

  1347.         "paddw                    %%mm1, %%mm0          \n\t"

  1348. 

  1349.         "movq                     %%mm0, (%%"REG_D", %%"REG_a") \n\t"

  1350. 

  1351.         "add                         $8, %%"REG_a"      \n\t"

  1352.     // End

  1353.         "9:                                             \n\t"

  1354. //        "int $3                                         \n\t"

  1355.         "lea                 " LOCAL_MANGLE(0b) ", %0   \n\t"

  1356.         "lea                 " LOCAL_MANGLE(1b) ", %1   \n\t"

  1357.         "lea                 " LOCAL_MANGLE(2b) ", %2   \n\t"

  1358.         "dec                         %1                 \n\t"

  1359.         "dec                         %2                 \n\t"

  1360.         "sub                         %0, %1             \n\t"

  1361.         "sub                         %0, %2             \n\t"

  1362.         "lea                 " LOCAL_MANGLE(9b) ", %3   \n\t"

  1363.         "sub                         %0, %3             \n\t"

  1364. 

  1365. 

  1366.         :"=r" (fragmentA), "=r" (imm8OfPShufW1A), "=r" (imm8OfPShufW2A),

  1367.         "=r" (fragmentLengthA)

  1368.     );

  1369. 

  1370.     asm volatile(

  1371.         "jmp                         9f                 \n\t"

  1372.     // Begin

  1373.         "0:                                             \n\t"

  1374.         "movq    (%%"REG_d", %%"REG_a"), %%mm3          \n\t"

  1375.         "movd    (%%"REG_c", %%"REG_S"), %%mm0          \n\t"

  1376.         "punpcklbw                %%mm7, %%mm0          \n\t"

  1377.         "pshufw                   $0xFF, %%mm0, %%mm1   \n\t"

  1378.         "1:                                             \n\t"

  1379.         "pshufw                   $0xFF, %%mm0, %%mm0   \n\t"

  1380.         "2:                                             \n\t"

  1381.         "psubw                    %%mm1, %%mm0          \n\t"

  1382.         "movl   8(%%"REG_b", %%"REG_a"), %%esi          \n\t"

  1383.         "pmullw                   %%mm3, %%mm0          \n\t"

  1384.         "psllw                       $7, %%mm1          \n\t"

  1385.         "paddw                    %%mm1, %%mm0          \n\t"

  1386. 

  1387.         "movq                     %%mm0, (%%"REG_D", %%"REG_a") \n\t"

  1388. 

  1389.         "add                         $8, %%"REG_a"      \n\t"

  1390.     // End

  1391.         "9:                                             \n\t"

  1392. //        "int                       $3                   \n\t"

  1393.         "lea                 " LOCAL_MANGLE(0b) ", %0   \n\t"

  1394.         "lea                 " LOCAL_MANGLE(1b) ", %1   \n\t"

  1395.         "lea                 " LOCAL_MANGLE(2b) ", %2   \n\t"

  1396.         "dec                         %1                 \n\t"

  1397.         "dec                         %2                 \n\t"

  1398.         "sub                         %0, %1             \n\t"

  1399.         "sub                         %0, %2             \n\t"

  1400.         "lea                 " LOCAL_MANGLE(9b) ", %3   \n\t"

  1401.         "sub                         %0, %3             \n\t"

  1402. 

  1403. 

  1404.         :"=r" (fragmentB), "=r" (imm8OfPShufW1B), "=r" (imm8OfPShufW2B),

  1405.         "=r" (fragmentLengthB)

  1406.     );

  1407. 

  1408.     xpos= 0; //lumXInc/2 - 0x8000; // difference between pixel centers

  1409.     fragmentPos=0;

  1410. 

  1411.     for (i=0; i<dstW/numSplits; i++)

  1412.     {

  1413.         int xx=xpos>>16;

  1414. 

  1415.         if ((i&3) == 0)

  1416.         {

  1417.             int a=0;

  1418.             int b=((xpos+xInc)>>16) - xx;

  1419.             int c=((xpos+xInc*2)>>16) - xx;

  1420.             int d=((xpos+xInc*3)>>16) - xx;

  1421. 

  1422.             filter[i  ] = (( xpos         & 0xFFFF) ^ 0xFFFF)>>9;

  1423.             filter[i+1] = (((xpos+xInc  ) & 0xFFFF) ^ 0xFFFF)>>9;

  1424.             filter[i+2] = (((xpos+xInc*2) & 0xFFFF) ^ 0xFFFF)>>9;

  1425.             filter[i+3] = (((xpos+xInc*3) & 0xFFFF) ^ 0xFFFF)>>9;

  1426.             filterPos[i/2]= xx;

  1427. 

  1428.             if (d+1<4)

  1429.             {

  1430.                 int maxShift= 3-(d+1);

  1431.                 int shift=0;

  1432. 

  1433.                 memcpy(funnyCode + fragmentPos, fragmentB, fragmentLengthB);

  1434. 

  1435.                 funnyCode[fragmentPos + imm8OfPShufW1B]=

  1436.                     (a+1) | ((b+1)<<2) | ((c+1)<<4) | ((d+1)<<6);

  1437.                 funnyCode[fragmentPos + imm8OfPShufW2B]=

  1438.                     a | (b<<2) | (c<<4) | (d<<6);

  1439. 

  1440.                 if (i+3>=dstW) shift=maxShift; //avoid overread

  1441.                 else if ((filterPos[i/2]&3) <= maxShift) shift=filterPos[i/2]&3; //Align

  1442. 

  1443.                 if (shift && i>=shift)

  1444.                 {

  1445.                     funnyCode[fragmentPos + imm8OfPShufW1B]+= 0x55*shift;

  1446.                     funnyCode[fragmentPos + imm8OfPShufW2B]+= 0x55*shift;

  1447.                     filterPos[i/2]-=shift;

  1448.                 }

  1449. 

  1450.                 fragmentPos+= fragmentLengthB;

  1451.             }

  1452.             else

  1453.             {

  1454.                 int maxShift= 3-d;

  1455.                 int shift=0;

  1456. 

  1457.                 memcpy(funnyCode + fragmentPos, fragmentA, fragmentLengthA);

  1458. 

  1459.                 funnyCode[fragmentPos + imm8OfPShufW1A]=

  1460.                 funnyCode[fragmentPos + imm8OfPShufW2A]=

  1461.                     a | (b<<2) | (c<<4) | (d<<6);

  1462. 

  1463.                 if (i+4>=dstW) shift=maxShift; //avoid overread

  1464.                 else if ((filterPos[i/2]&3) <= maxShift) shift=filterPos[i/2]&3; //partial align

  1465. 

  1466.                 if (shift && i>=shift)

  1467.                 {

  1468.                     funnyCode[fragmentPos + imm8OfPShufW1A]+= 0x55*shift;

  1469.                     funnyCode[fragmentPos + imm8OfPShufW2A]+= 0x55*shift;

  1470.                     filterPos[i/2]-=shift;

  1471.                 }

  1472. 

  1473.                 fragmentPos+= fragmentLengthA;

  1474.             }

  1475. 

  1476.             funnyCode[fragmentPos]= RET;

  1477.         }

  1478.         xpos+=xInc;

  1479.     }

  1480.     filterPos[i/2]= xpos>>16; // needed to jump to the next part

  1481. }

  1482. #endif /* COMPILE_MMX2 */

  1483. 

  1484. static void globalInit(void){

  1485.     // generating tables:

  1486.     int i;

  1487.     for (i=0; i<768; i++){

  1488.         int c= av_clip_uint8(i-256);

  1489.         clip_table[i]=c;

  1490.     }

  1491. }

  1492. 

  1493. static SwsFunc getSwsFunc(int flags){

  1494. 

  1495. #if defined(RUNTIME_CPUDETECT) && defined (CONFIG_GPL)

  1496. #if defined(ARCH_X86)

  1497.     // ordered per speed fastest first

  1498.     if (flags & SWS_CPU_CAPS_MMX2)

  1499.         return swScale_MMX2;

  1500.     else if (flags & SWS_CPU_CAPS_3DNOW)

  1501.         return swScale_3DNow;

  1502.     else if (flags & SWS_CPU_CAPS_MMX)

  1503.         return swScale_MMX;

  1504.     else

  1505.         return swScale_C;

  1506. 

  1507. #else

  1508. #ifdef ARCH_POWERPC

  1509.     if (flags & SWS_CPU_CAPS_ALTIVEC)

  1510.         return swScale_altivec;

  1511.     else

  1512.         return swScale_C;

  1513. #endif

  1514.     return swScale_C;

  1515. #endif /* defined(ARCH_X86) */

  1516. #else //RUNTIME_CPUDETECT

  1517. #ifdef HAVE_MMX2

  1518.     return swScale_MMX2;

  1519. #elif defined (HAVE_3DNOW)

  1520.     return swScale_3DNow;

  1521. #elif defined (HAVE_MMX)

  1522.     return swScale_MMX;

  1523. #elif defined (HAVE_ALTIVEC)

  1524.     return swScale_altivec;

  1525. #else

  1526.     return swScale_C;

  1527. #endif

  1528. #endif //!RUNTIME_CPUDETECT

  1529. }

  1530. 

  1531. static int PlanarToNV12Wrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1532.                                int srcSliceH, uint8_t* dstParam[], int dstStride[]){

  1533.     uint8_t *dst=dstParam[0] + dstStride[0]*srcSliceY;

  1534.     /* Copy Y plane */

  1535.     if (dstStride[0]==srcStride[0] && srcStride[0] > 0)

  1536.         memcpy(dst, src[0], srcSliceH*dstStride[0]);

  1537.     else

  1538.     {

  1539.         int i;

  1540.         uint8_t *srcPtr= src[0];

  1541.         uint8_t *dstPtr= dst;

  1542.         for (i=0; i<srcSliceH; i++)

  1543.         {

  1544.             memcpy(dstPtr, srcPtr, c->srcW);

  1545.             srcPtr+= srcStride[0];

  1546.             dstPtr+= dstStride[0];

  1547.         }

  1548.     }

  1549.     dst = dstParam[1] + dstStride[1]*srcSliceY/2;

  1550.     if (c->dstFormat == PIX_FMT_NV12)

  1551.         interleaveBytes(src[1], src[2], dst, c->srcW/2, srcSliceH/2, srcStride[1], srcStride[2], dstStride[0]);

  1552.     else

  1553.         interleaveBytes(src[2], src[1], dst, c->srcW/2, srcSliceH/2, srcStride[2], srcStride[1], dstStride[0]);

  1554. 

  1555.     return srcSliceH;

  1556. }

  1557. 

  1558. static int PlanarToYuy2Wrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

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

  1560.     uint8_t *dst=dstParam[0] + dstStride[0]*srcSliceY;

  1561. 

  1562.     yv12toyuy2(src[0], src[1], src[2], dst, c->srcW, srcSliceH, srcStride[0], srcStride[1], dstStride[0]);

  1563. 

  1564.     return srcSliceH;

  1565. }

  1566. 

  1567. static int PlanarToUyvyWrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1568.                                int srcSliceH, uint8_t* dstParam[], int dstStride[]){

  1569.     uint8_t *dst=dstParam[0] + dstStride[0]*srcSliceY;

  1570. 

  1571.     yv12touyvy(src[0], src[1], src[2], dst, c->srcW, srcSliceH, srcStride[0], srcStride[1], dstStride[0]);

  1572. 

  1573.     return srcSliceH;

  1574. }

  1575. 

  1576. /* {RGB,BGR}{15,16,24,32} -> {RGB,BGR}{15,16,24,32} */

  1577. static int rgb2rgbWrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1578.                           int srcSliceH, uint8_t* dst[], int dstStride[]){

  1579.     const int srcFormat= c->srcFormat;

  1580.     const int dstFormat= c->dstFormat;

  1581.     const int srcBpp= (fmt_depth(srcFormat) + 7) >> 3;

  1582.     const int dstBpp= (fmt_depth(dstFormat) + 7) >> 3;

  1583.     const int srcId= fmt_depth(srcFormat) >> 2; /* 1:0, 4:1, 8:2, 15:3, 16:4, 24:6, 32:8 */

  1584.     const int dstId= fmt_depth(dstFormat) >> 2;

  1585.     void (*conv)(const uint8_t *src, uint8_t *dst, long src_size)=NULL;

  1586. 

  1587.     /* BGR -> BGR */

  1588.     if (  (isBGR(srcFormat) && isBGR(dstFormat))

  1589.        || (isRGB(srcFormat) && isRGB(dstFormat))){

  1590.         switch(srcId | (dstId<<4)){

  1591.         case 0x34: conv= rgb16to15; break;

  1592.         case 0x36: conv= rgb24to15; break;

  1593.         case 0x38: conv= rgb32to15; break;

  1594.         case 0x43: conv= rgb15to16; break;

  1595.         case 0x46: conv= rgb24to16; break;

  1596.         case 0x48: conv= rgb32to16; break;

  1597.         case 0x63: conv= rgb15to24; break;

  1598.         case 0x64: conv= rgb16to24; break;

  1599.         case 0x68: conv= rgb32to24; break;

  1600.         case 0x83: conv= rgb15to32; break;

  1601.         case 0x84: conv= rgb16to32; break;

  1602.         case 0x86: conv= rgb24to32; break;

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

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

  1605.         }

  1606.     }else if (  (isBGR(srcFormat) && isRGB(dstFormat))

  1607.              || (isRGB(srcFormat) && isBGR(dstFormat))){

  1608.         switch(srcId | (dstId<<4)){

  1609.         case 0x33: conv= rgb15tobgr15; break;

  1610.         case 0x34: conv= rgb16tobgr15; break;

  1611.         case 0x36: conv= rgb24tobgr15; break;

  1612.         case 0x38: conv= rgb32tobgr15; break;

  1613.         case 0x43: conv= rgb15tobgr16; break;

  1614.         case 0x44: conv= rgb16tobgr16; break;

  1615.         case 0x46: conv= rgb24tobgr16; break;

  1616.         case 0x48: conv= rgb32tobgr16; break;

  1617.         case 0x63: conv= rgb15tobgr24; break;

  1618.         case 0x64: conv= rgb16tobgr24; break;

  1619.         case 0x66: conv= rgb24tobgr24; break;

  1620.         case 0x68: conv= rgb32tobgr24; break;

  1621.         case 0x83: conv= rgb15tobgr32; break;

  1622.         case 0x84: conv= rgb16tobgr32; break;

  1623.         case 0x86: conv= rgb24tobgr32; break;

  1624.         case 0x88: conv= rgb32tobgr32; break;

  1625.         default: av_log(c, AV_LOG_ERROR, "internal error %s -> %s converter\n",

  1626.                         sws_format_name(srcFormat), sws_format_name(dstFormat)); break;

  1627.         }

  1628.     }else{

  1629.         av_log(c, AV_LOG_ERROR, "internal error %s -> %s converter\n",

  1630.                sws_format_name(srcFormat), sws_format_name(dstFormat));

  1631.     }

  1632. 

  1633.     if(conv)

  1634.     {

  1635.         if (dstStride[0]*srcBpp == srcStride[0]*dstBpp && srcStride[0] > 0)

  1636.             conv(src[0], dst[0] + dstStride[0]*srcSliceY, srcSliceH*srcStride[0]);

  1637.         else

  1638.         {

  1639.             int i;

  1640.             uint8_t *srcPtr= src[0];

  1641.             uint8_t *dstPtr= dst[0] + dstStride[0]*srcSliceY;

  1642. 

  1643.             for (i=0; i<srcSliceH; i++)

  1644.             {

  1645.                 conv(srcPtr, dstPtr, c->srcW*srcBpp);

  1646.                 srcPtr+= srcStride[0];

  1647.                 dstPtr+= dstStride[0];

  1648.             }

  1649.         }

  1650.     }

  1651.     return srcSliceH;

  1652. }

  1653. 

  1654. static int bgr24toyv12Wrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1655.                               int srcSliceH, uint8_t* dst[], int dstStride[]){

  1656. 

  1657.     rgb24toyv12(

  1658.         src[0],

  1659.         dst[0]+ srcSliceY    *dstStride[0],

  1660.         dst[1]+(srcSliceY>>1)*dstStride[1],

  1661.         dst[2]+(srcSliceY>>1)*dstStride[2],

  1662.         c->srcW, srcSliceH,

  1663.         dstStride[0], dstStride[1], srcStride[0]);

  1664.     return srcSliceH;

  1665. }

  1666. 

  1667. static int yvu9toyv12Wrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1668.                              int srcSliceH, uint8_t* dst[], int dstStride[]){

  1669.     int i;

  1670. 

  1671.     /* copy Y */

  1672.     if (srcStride[0]==dstStride[0] && srcStride[0] > 0)

  1673.         memcpy(dst[0]+ srcSliceY*dstStride[0], src[0], srcStride[0]*srcSliceH);

  1674.     else{

  1675.         uint8_t *srcPtr= src[0];

  1676.         uint8_t *dstPtr= dst[0] + dstStride[0]*srcSliceY;

  1677. 

  1678.         for (i=0; i<srcSliceH; i++)

  1679.         {

  1680.             memcpy(dstPtr, srcPtr, c->srcW);

  1681.             srcPtr+= srcStride[0];

  1682.             dstPtr+= dstStride[0];

  1683.         }

  1684.     }

  1685. 

  1686.     if (c->dstFormat==PIX_FMT_YUV420P){

  1687.         planar2x(src[1], dst[1], c->chrSrcW, c->chrSrcH, srcStride[1], dstStride[1]);

  1688.         planar2x(src[2], dst[2], c->chrSrcW, c->chrSrcH, srcStride[2], dstStride[2]);

  1689.     }else{

  1690.         planar2x(src[1], dst[2], c->chrSrcW, c->chrSrcH, srcStride[1], dstStride[2]);

  1691.         planar2x(src[2], dst[1], c->chrSrcW, c->chrSrcH, srcStride[2], dstStride[1]);

  1692.     }

  1693.     return srcSliceH;

  1694. }

  1695. 

  1696. /* unscaled copy like stuff (assumes nearly identical formats) */

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

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

  1699. {

  1700.     if (dstStride[0]==srcStride[0] && srcStride[0] > 0)

  1701.         memcpy(dst[0] + dstStride[0]*srcSliceY, src[0], srcSliceH*dstStride[0]);

  1702.     else

  1703.     {

  1704.         int i;

  1705.         uint8_t *srcPtr= src[0];

  1706.         uint8_t *dstPtr= dst[0] + dstStride[0]*srcSliceY;

  1707.         int length=0;

  1708. 

  1709.         /* universal length finder */

  1710.         while(length+c->srcW <= FFABS(dstStride[0])

  1711.            && length+c->srcW <= FFABS(srcStride[0])) length+= c->srcW;

  1712.         assert(length!=0);

  1713. 

  1714.         for (i=0; i<srcSliceH; i++)

  1715.         {

  1716.             memcpy(dstPtr, srcPtr, length);

  1717.             srcPtr+= srcStride[0];

  1718.             dstPtr+= dstStride[0];

  1719.         }

  1720.     }

  1721.     return srcSliceH;

  1722. }

  1723. 

  1724. static int planarCopy(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1725.                       int srcSliceH, uint8_t* dst[], int dstStride[])

  1726. {

  1727.     int plane;

  1728.     for (plane=0; plane<3; plane++)

  1729.     {

  1730.         int length= plane==0 ? c->srcW  : -((-c->srcW  )>>c->chrDstHSubSample);

  1731.         int y=      plane==0 ? srcSliceY: -((-srcSliceY)>>c->chrDstVSubSample);

  1732.         int height= plane==0 ? srcSliceH: -((-srcSliceH)>>c->chrDstVSubSample);

  1733. 

  1734.         if ((isGray(c->srcFormat) || isGray(c->dstFormat)) && plane>0)

  1735.         {

  1736.             if (!isGray(c->dstFormat))

  1737.                 memset(dst[plane], 128, dstStride[plane]*height);

  1738.         }

  1739.         else

  1740.         {

  1741.             if (dstStride[plane]==srcStride[plane] && srcStride[plane] > 0)

  1742.                 memcpy(dst[plane] + dstStride[plane]*y, src[plane], height*dstStride[plane]);

  1743.             else

  1744.             {

  1745.                 int i;

  1746.                 uint8_t *srcPtr= src[plane];

  1747.                 uint8_t *dstPtr= dst[plane] + dstStride[plane]*y;

  1748.                 for (i=0; i<height; i++)

  1749.                 {

  1750.                     memcpy(dstPtr, srcPtr, length);

  1751.                     srcPtr+= srcStride[plane];

  1752.                     dstPtr+= dstStride[plane];

  1753.                 }

  1754.             }

  1755.         }

  1756.     }

  1757.     return srcSliceH;

  1758. }

  1759. 

  1760. static int gray16togray(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

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

  1762. 

  1763.     int length= c->srcW;

  1764.     int y=      srcSliceY;

  1765.     int height= srcSliceH;

  1766.     int i, j;

  1767.     uint8_t *srcPtr= src[0];

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

  1769. 

  1770.     if (!isGray(c->dstFormat)){

  1771.         int height= -((-srcSliceH)>>c->chrDstVSubSample);

  1772.         memset(dst[1], 128, dstStride[1]*height);

  1773.         memset(dst[2], 128, dstStride[2]*height);

  1774.     }

  1775.     if (c->srcFormat == PIX_FMT_GRAY16LE) srcPtr++;

  1776.     for (i=0; i<height; i++)

  1777.     {

  1778.         for (j=0; j<length; j++) dstPtr[j] = srcPtr[j<<1];

  1779.         srcPtr+= srcStride[0];

  1780.         dstPtr+= dstStride[0];

  1781.     }

  1782.     return srcSliceH;

  1783. }

  1784. 

  1785. static int graytogray16(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

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

  1787. 

  1788.     int length= c->srcW;

  1789.     int y=      srcSliceY;

  1790.     int height= srcSliceH;

  1791.     int i, j;

  1792.     uint8_t *srcPtr= src[0];

  1793.     uint8_t *dstPtr= dst[0] + dstStride[0]*y;

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

  1795.     {

  1796.         for (j=0; j<length; j++)

  1797.         {

  1798.             dstPtr[j<<1] = srcPtr[j];

  1799.             dstPtr[(j<<1)+1] = srcPtr[j];

  1800.         }

  1801.         srcPtr+= srcStride[0];

  1802.         dstPtr+= dstStride[0];

  1803.     }

  1804.     return srcSliceH;

  1805. }

  1806. 

  1807. static int gray16swap(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1808.                       int srcSliceH, uint8_t* dst[], int dstStride[]){

  1809. 

  1810.     int length= c->srcW;

  1811.     int y=      srcSliceY;

  1812.     int height= srcSliceH;

  1813.     int i, j;

  1814.     uint16_t *srcPtr= (uint16_t*)src[0];

  1815.     uint16_t *dstPtr= (uint16_t*)(dst[0] + dstStride[0]*y/2);

  1816.     for (i=0; i<height; i++)

  1817.     {

  1818.         for (j=0; j<length; j++) dstPtr[j] = bswap_16(srcPtr[j]);

  1819.         srcPtr+= srcStride[0]/2;

  1820.         dstPtr+= dstStride[0]/2;

  1821.     }

  1822.     return srcSliceH;

  1823. }

  1824. 

  1825. 

  1826. static void getSubSampleFactors(int *h, int *v, int format){

  1827.     switch(format){

  1828.     case PIX_FMT_UYVY422:

  1829.     case PIX_FMT_YUYV422:

  1830.         *h=1;

  1831.         *v=0;

  1832.         break;

  1833.     case PIX_FMT_YUV420P:

  1834.     case PIX_FMT_YUVA420P:

  1835.     case PIX_FMT_GRAY16BE:

  1836.     case PIX_FMT_GRAY16LE:

  1837.     case PIX_FMT_GRAY8: //FIXME remove after different subsamplings are fully implemented

  1838.     case PIX_FMT_NV12:

  1839.     case PIX_FMT_NV21:

  1840.         *h=1;

  1841.         *v=1;

  1842.         break;

  1843.     case PIX_FMT_YUV440P:

  1844.         *h=0;

  1845.         *v=1;

  1846.         break;

  1847.     case PIX_FMT_YUV410P:

  1848.         *h=2;

  1849.         *v=2;

  1850.         break;

  1851.     case PIX_FMT_YUV444P:

  1852.         *h=0;

  1853.         *v=0;

  1854.         break;

  1855.     case PIX_FMT_YUV422P:

  1856.         *h=1;

  1857.         *v=0;

  1858.         break;

  1859.     case PIX_FMT_YUV411P:

  1860.         *h=2;

  1861.         *v=0;

  1862.         break;

  1863.     default:

  1864.         *h=0;

  1865.         *v=0;

  1866.         break;

  1867.     }

  1868. }

  1869. 

  1870. static uint16_t roundToInt16(int64_t f){

  1871.     int r= (f + (1<<15))>>16;

  1872.          if (r<-0x7FFF) return 0x8000;

  1873.     else if (r> 0x7FFF) return 0x7FFF;

  1874.     else                return r;

  1875. }

  1876. 

  1877. /**

  1878.  * @param inv_table the yuv2rgb coeffs, normally Inverse_Table_6_9[x]

  1879.  * @param fullRange if 1 then the luma range is 0..255 if 0 it is 16..235

  1880.  * @return -1 if not supported

  1881.  */

  1882. int sws_setColorspaceDetails(SwsContext *c, const int inv_table[4], int srcRange, const int table[4], int dstRange, int brightness, int contrast, int saturation){

  1883.     int64_t crv =  inv_table[0];

  1884.     int64_t cbu =  inv_table[1];

  1885.     int64_t cgu = -inv_table[2];

  1886.     int64_t cgv = -inv_table[3];

  1887.     int64_t cy  = 1<<16;

  1888.     int64_t oy  = 0;

  1889. 

  1890.     if (isYUV(c->dstFormat) || isGray(c->dstFormat)) return -1;

  1891.     memcpy(c->srcColorspaceTable, inv_table, sizeof(int)*4);

  1892.     memcpy(c->dstColorspaceTable,     table, sizeof(int)*4);

  1893. 

  1894.     c->brightness= brightness;

  1895.     c->contrast  = contrast;

  1896.     c->saturation= saturation;

  1897.     c->srcRange  = srcRange;

  1898.     c->dstRange  = dstRange;

  1899. 

  1900.     c->uOffset=   0x0400040004000400LL;

  1901.     c->vOffset=   0x0400040004000400LL;

  1902. 

  1903.     if (!srcRange){

  1904.         cy= (cy*255) / 219;

  1905.         oy= 16<<16;

  1906.     }else{

  1907.         crv= (crv*224) / 255;

  1908.         cbu= (cbu*224) / 255;

  1909.         cgu= (cgu*224) / 255;

  1910.         cgv= (cgv*224) / 255;

  1911.     }

  1912. 

  1913.     cy = (cy *contrast             )>>16;

  1914.     crv= (crv*contrast * saturation)>>32;

  1915.     cbu= (cbu*contrast * saturation)>>32;

  1916.     cgu= (cgu*contrast * saturation)>>32;

  1917.     cgv= (cgv*contrast * saturation)>>32;

  1918. 

  1919.     oy -= 256*brightness;

  1920. 

  1921.     c->yCoeff=    roundToInt16(cy *8192) * 0x0001000100010001ULL;

  1922.     c->vrCoeff=   roundToInt16(crv*8192) * 0x0001000100010001ULL;

  1923.     c->ubCoeff=   roundToInt16(cbu*8192) * 0x0001000100010001ULL;

  1924.     c->vgCoeff=   roundToInt16(cgv*8192) * 0x0001000100010001ULL;

  1925.     c->ugCoeff=   roundToInt16(cgu*8192) * 0x0001000100010001ULL;

  1926.     c->yOffset=   roundToInt16(oy *   8) * 0x0001000100010001ULL;

  1927. 

  1928.     yuv2rgb_c_init_tables(c, inv_table, srcRange, brightness, contrast, saturation);

  1929.     //FIXME factorize

  1930. 

  1931. #ifdef COMPILE_ALTIVEC

  1932.     if (c->flags & SWS_CPU_CAPS_ALTIVEC)

  1933.         yuv2rgb_altivec_init_tables (c, inv_table, brightness, contrast, saturation);

  1934. #endif

  1935.     return 0;

  1936. }

  1937. 

  1938. /**

  1939.  * @return -1 if not supported

  1940.  */

  1941. int sws_getColorspaceDetails(SwsContext *c, int **inv_table, int *srcRange, int **table, int *dstRange, int *brightness, int *contrast, int *saturation){

  1942.     if (isYUV(c->dstFormat) || isGray(c->dstFormat)) return -1;

  1943. 

  1944.     *inv_table = c->srcColorspaceTable;

  1945.     *table     = c->dstColorspaceTable;

  1946.     *srcRange  = c->srcRange;

  1947.     *dstRange  = c->dstRange;

  1948.     *brightness= c->brightness;

  1949.     *contrast  = c->contrast;

  1950.     *saturation= c->saturation;

  1951. 

  1952.     return 0;

  1953. }

  1954. 

  1955. static int handle_jpeg(int *format)

  1956. {

  1957.     switch (*format) {

  1958.         case PIX_FMT_YUVJ420P:

  1959.             *format = PIX_FMT_YUV420P;

  1960.             return 1;

  1961.         case PIX_FMT_YUVJ422P:

  1962.             *format = PIX_FMT_YUV422P;

  1963.             return 1;

  1964.         case PIX_FMT_YUVJ444P:

  1965.             *format = PIX_FMT_YUV444P;

  1966.             return 1;

  1967.         case PIX_FMT_YUVJ440P:

  1968.             *format = PIX_FMT_YUV440P;

  1969.             return 1;

  1970.         default:

  1971.             return 0;

  1972.     }

  1973. }

  1974. 

  1975. SwsContext *sws_getContext(int srcW, int srcH, int srcFormat, int dstW, int dstH, int dstFormat, int flags,

  1976.                            SwsFilter *srcFilter, SwsFilter *dstFilter, double *param){

  1977. 

  1978.     SwsContext *c;

  1979.     int i;

  1980.     int usesVFilter, usesHFilter;

  1981.     int unscaled, needsDither;

  1982.     int srcRange, dstRange;

  1983.     SwsFilter dummyFilter= {NULL, NULL, NULL, NULL};

  1984. #if defined(ARCH_X86)

  1985.     if (flags & SWS_CPU_CAPS_MMX)

  1986.         asm volatile("emms\n\t"::: "memory");

  1987. #endif

  1988. 

  1989. #if !defined(RUNTIME_CPUDETECT) || !defined (CONFIG_GPL) //ensure that the flags match the compiled variant if cpudetect is off

  1990.     flags &= ~(SWS_CPU_CAPS_MMX|SWS_CPU_CAPS_MMX2|SWS_CPU_CAPS_3DNOW|SWS_CPU_CAPS_ALTIVEC|SWS_CPU_CAPS_BFIN);

  1991. #ifdef HAVE_MMX2

  1992.     flags |= SWS_CPU_CAPS_MMX|SWS_CPU_CAPS_MMX2;

  1993. #elif defined (HAVE_3DNOW)

  1994.     flags |= SWS_CPU_CAPS_MMX|SWS_CPU_CAPS_3DNOW;

  1995. #elif defined (HAVE_MMX)

  1996.     flags |= SWS_CPU_CAPS_MMX;

  1997. #elif defined (HAVE_ALTIVEC)

  1998.     flags |= SWS_CPU_CAPS_ALTIVEC;

  1999. #elif defined (ARCH_BFIN)

  2000.     flags |= SWS_CPU_CAPS_BFIN;

  2001. #endif

  2002. #endif /* RUNTIME_CPUDETECT */

  2003.     if (clip_table[512] != 255) globalInit();

  2004.     if (!rgb15to16) sws_rgb2rgb_init(flags);

  2005. 

  2006.     unscaled = (srcW == dstW && srcH == dstH);

  2007.     needsDither= (isBGR(dstFormat) || isRGB(dstFormat))

  2008.         && (fmt_depth(dstFormat))<24

  2009.         && ((fmt_depth(dstFormat))<(fmt_depth(srcFormat)) || (!(isRGB(srcFormat) || isBGR(srcFormat))));

  2010. 

  2011.     srcRange = handle_jpeg(&srcFormat);

  2012.     dstRange = handle_jpeg(&dstFormat);

  2013. 

  2014.     if (!isSupportedIn(srcFormat))

  2015.     {

  2016.         av_log(NULL, AV_LOG_ERROR, "swScaler: %s is not supported as input pixel format\n", sws_format_name(srcFormat));

  2017.         return NULL;

  2018.     }

  2019.     if (!isSupportedOut(dstFormat))

  2020.     {

  2021.         av_log(NULL, AV_LOG_ERROR, "swScaler: %s is not supported as output pixel format\n", sws_format_name(dstFormat));

  2022.         return NULL;

  2023.     }

  2024. 

  2025.     i= flags & ( SWS_POINT

  2026.                 |SWS_AREA

  2027.                 |SWS_BILINEAR

  2028.                 |SWS_FAST_BILINEAR

  2029.                 |SWS_BICUBIC

  2030.                 |SWS_X

  2031.                 |SWS_GAUSS

  2032.                 |SWS_LANCZOS

  2033.                 |SWS_SINC

  2034.                 |SWS_SPLINE

  2035.                 |SWS_BICUBLIN);

  2036.     if(!i || (i & (i-1)))

  2037.     {

  2038.         av_log(NULL, AV_LOG_ERROR, "swScaler: Exactly one scaler algorithm must be choosen\n");

  2039.         return NULL;

  2040.     }

  2041. 

  2042. 

  2043.     /* sanity check */

  2044.     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

  2045.     {

  2046.         av_log(NULL, AV_LOG_ERROR, "swScaler: %dx%d -> %dx%d is invalid scaling dimension\n",

  2047.                srcW, srcH, dstW, dstH);

  2048.         return NULL;

  2049.     }

  2050.     if(srcW > VOFW || dstW > VOFW){

  2051.         av_log(NULL, AV_LOG_ERROR, "swScaler: Compile time max width is "AV_STRINGIFY(VOFW)" change VOF/VOFW and recompile\n");

  2052.         return NULL;

  2053.     }

  2054. 

  2055.     if (!dstFilter) dstFilter= &dummyFilter;

  2056.     if (!srcFilter) srcFilter= &dummyFilter;

  2057. 

  2058.     c= av_mallocz(sizeof(SwsContext));

  2059. 

  2060.     c->av_class = &sws_context_class;

  2061.     c->srcW= srcW;

  2062.     c->srcH= srcH;

  2063.     c->dstW= dstW;

  2064.     c->dstH= dstH;

  2065.     c->lumXInc= ((srcW<<16) + (dstW>>1))/dstW;

  2066.     c->lumYInc= ((srcH<<16) + (dstH>>1))/dstH;

  2067.     c->flags= flags;

  2068.     c->dstFormat= dstFormat;

  2069.     c->srcFormat= srcFormat;

  2070.     c->vRounder= 4* 0x0001000100010001ULL;

  2071. 

  2072.     usesHFilter= usesVFilter= 0;

  2073.     if (dstFilter->lumV && dstFilter->lumV->length>1) usesVFilter=1;

  2074.     if (dstFilter->lumH && dstFilter->lumH->length>1) usesHFilter=1;

  2075.     if (dstFilter->chrV && dstFilter->chrV->length>1) usesVFilter=1;

  2076.     if (dstFilter->chrH && dstFilter->chrH->length>1) usesHFilter=1;

  2077.     if (srcFilter->lumV && srcFilter->lumV->length>1) usesVFilter=1;

  2078.     if (srcFilter->lumH && srcFilter->lumH->length>1) usesHFilter=1;

  2079.     if (srcFilter->chrV && srcFilter->chrV->length>1) usesVFilter=1;

  2080.     if (srcFilter->chrH && srcFilter->chrH->length>1) usesHFilter=1;

  2081. 

  2082.     getSubSampleFactors(&c->chrSrcHSubSample, &c->chrSrcVSubSample, srcFormat);

  2083.     getSubSampleFactors(&c->chrDstHSubSample, &c->chrDstVSubSample, dstFormat);

  2084. 

  2085.     // reuse chroma for 2 pixles rgb/bgr unless user wants full chroma interpolation

  2086.     if ((isBGR(dstFormat) || isRGB(dstFormat)) && !(flags&SWS_FULL_CHR_H_INT)) c->chrDstHSubSample=1;

  2087. 

  2088.     // drop some chroma lines if the user wants it

  2089.     c->vChrDrop= (flags&SWS_SRC_V_CHR_DROP_MASK)>>SWS_SRC_V_CHR_DROP_SHIFT;

  2090.     c->chrSrcVSubSample+= c->vChrDrop;

  2091. 

  2092.     // drop every 2. pixel for chroma calculation unless user wants full chroma

  2093.     if ((isBGR(srcFormat) || isRGB(srcFormat)) && !(flags&SWS_FULL_CHR_H_INP)

  2094.       && srcFormat!=PIX_FMT_RGB8      && srcFormat!=PIX_FMT_BGR8

  2095.       && srcFormat!=PIX_FMT_RGB4      && srcFormat!=PIX_FMT_BGR4

  2096.       && srcFormat!=PIX_FMT_RGB4_BYTE && srcFormat!=PIX_FMT_BGR4_BYTE)

  2097.         c->chrSrcHSubSample=1;

  2098. 

  2099.     if (param){

  2100.         c->param[0] = param[0];

  2101.         c->param[1] = param[1];

  2102.     }else{

  2103.         c->param[0] =

  2104.         c->param[1] = SWS_PARAM_DEFAULT;

  2105.     }

  2106. 

  2107.     c->chrIntHSubSample= c->chrDstHSubSample;

  2108.     c->chrIntVSubSample= c->chrSrcVSubSample;

  2109. 

  2110.     // Note the -((-x)>>y) is so that we always round toward +inf.

  2111.     c->chrSrcW= -((-srcW) >> c->chrSrcHSubSample);

  2112.     c->chrSrcH= -((-srcH) >> c->chrSrcVSubSample);

  2113.     c->chrDstW= -((-dstW) >> c->chrDstHSubSample);

  2114.     c->chrDstH= -((-dstH) >> c->chrDstVSubSample);

  2115. 

  2116.     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);

  2117. 

  2118.     /* unscaled special Cases */

  2119.     if (unscaled && !usesHFilter && !usesVFilter)

  2120.     {

  2121.         /* yv12_to_nv12 */

  2122.         if (srcFormat == PIX_FMT_YUV420P && (dstFormat == PIX_FMT_NV12 || dstFormat == PIX_FMT_NV21))

  2123.         {

  2124.             c->swScale= PlanarToNV12Wrapper;

  2125.         }

  2126. #ifdef CONFIG_GPL

  2127.         /* yuv2bgr */

  2128.         if ((srcFormat==PIX_FMT_YUV420P || srcFormat==PIX_FMT_YUV422P) && (isBGR(dstFormat) || isRGB(dstFormat)))

  2129.         {

  2130.             c->swScale= yuv2rgb_get_func_ptr(c);

  2131.         }

  2132. #endif

  2133. 

  2134.         if (srcFormat==PIX_FMT_YUV410P && dstFormat==PIX_FMT_YUV420P)

  2135.         {

  2136.             c->swScale= yvu9toyv12Wrapper;

  2137.         }

  2138. 

  2139.         /* bgr24toYV12 */

  2140.         if (srcFormat==PIX_FMT_BGR24 && dstFormat==PIX_FMT_YUV420P)

  2141.             c->swScale= bgr24toyv12Wrapper;

  2142. 

  2143.         /* rgb/bgr -> rgb/bgr (no dither needed forms) */

  2144.         if (  (isBGR(srcFormat) || isRGB(srcFormat))

  2145.            && (isBGR(dstFormat) || isRGB(dstFormat))

  2146.            && srcFormat != PIX_FMT_BGR8      && dstFormat != PIX_FMT_BGR8

  2147.            && srcFormat != PIX_FMT_RGB8      && dstFormat != PIX_FMT_RGB8

  2148.            && srcFormat != PIX_FMT_BGR4      && dstFormat != PIX_FMT_BGR4

  2149.            && srcFormat != PIX_FMT_RGB4      && dstFormat != PIX_FMT_RGB4

  2150.            && srcFormat != PIX_FMT_BGR4_BYTE && dstFormat != PIX_FMT_BGR4_BYTE

  2151.            && srcFormat != PIX_FMT_RGB4_BYTE && dstFormat != PIX_FMT_RGB4_BYTE

  2152.            && srcFormat != PIX_FMT_MONOBLACK && dstFormat != PIX_FMT_MONOBLACK

  2153.            && !needsDither)

  2154.              c->swScale= rgb2rgbWrapper;

  2155. 

  2156.         /* LQ converters if -sws 0 or -sws 4*/

  2157.         if (c->flags&(SWS_FAST_BILINEAR|SWS_POINT)){

  2158.             /* rgb/bgr -> rgb/bgr (dither needed forms) */

  2159.             if ( (isBGR(srcFormat) || isRGB(srcFormat))

  2160.               && (isBGR(dstFormat) || isRGB(dstFormat))

  2161.               && needsDither)

  2162.                 c->swScale= rgb2rgbWrapper;

  2163. 

  2164.             /* yv12_to_yuy2 */

  2165.             if (srcFormat == PIX_FMT_YUV420P &&

  2166.                 (dstFormat == PIX_FMT_YUYV422 || dstFormat == PIX_FMT_UYVY422))

  2167.             {

  2168.                 if (dstFormat == PIX_FMT_YUYV422)

  2169.                     c->swScale= PlanarToYuy2Wrapper;

  2170.                 else

  2171.                     c->swScale= PlanarToUyvyWrapper;

  2172.             }

  2173.         }

  2174. 

  2175. #ifdef COMPILE_ALTIVEC

  2176.         if ((c->flags & SWS_CPU_CAPS_ALTIVEC) &&

  2177.             ((srcFormat == PIX_FMT_YUV420P &&

  2178.              (dstFormat == PIX_FMT_YUYV422 || dstFormat == PIX_FMT_UYVY422)))) {

  2179.           // unscaled YV12 -> packed YUV, we want speed

  2180.           if (dstFormat == PIX_FMT_YUYV422)

  2181.               c->swScale= yv12toyuy2_unscaled_altivec;

  2182.           else

  2183.               c->swScale= yv12touyvy_unscaled_altivec;

  2184.         }

  2185. #endif

  2186. 

  2187.         /* simple copy */

  2188.         if (  srcFormat == dstFormat

  2189.             || (isPlanarYUV(srcFormat) && isGray(dstFormat))

  2190.             || (isPlanarYUV(dstFormat) && isGray(srcFormat)))

  2191.         {

  2192.             if (isPacked(c->srcFormat))

  2193.                 c->swScale= packedCopy;

  2194.             else /* Planar YUV or gray */

  2195.                 c->swScale= planarCopy;

  2196.         }

  2197. 

  2198.         /* gray16{le,be} conversions */

  2199.         if (isGray16(srcFormat) && (isPlanarYUV(dstFormat) || (dstFormat == PIX_FMT_GRAY8)))

  2200.         {

  2201.             c->swScale= gray16togray;

  2202.         }

  2203.         if ((isPlanarYUV(srcFormat) || (srcFormat == PIX_FMT_GRAY8)) && isGray16(dstFormat))

  2204.         {

  2205.             c->swScale= graytogray16;

  2206.         }

  2207.         if (srcFormat != dstFormat && isGray16(srcFormat) && isGray16(dstFormat))

  2208.         {

  2209.             c->swScale= gray16swap;

  2210.         }

  2211. 

  2212. #ifdef ARCH_BFIN

  2213.         if (flags & SWS_CPU_CAPS_BFIN)

  2214.             ff_bfin_get_unscaled_swscale (c);

  2215. #endif

  2216. 

  2217.         if (c->swScale){

  2218.             if (flags&SWS_PRINT_INFO)

  2219.                 av_log(c, AV_LOG_INFO, "using unscaled %s -> %s special converter\n",

  2220.                                 sws_format_name(srcFormat), sws_format_name(dstFormat));

  2221.             return c;

  2222.         }

  2223.     }

  2224. 

  2225.     if (flags & SWS_CPU_CAPS_MMX2)

  2226.     {

  2227.         c->canMMX2BeUsed= (dstW >=srcW && (dstW&31)==0 && (srcW&15)==0) ? 1 : 0;

  2228.         if (!c->canMMX2BeUsed && dstW >=srcW && (srcW&15)==0 && (flags&SWS_FAST_BILINEAR))

  2229.         {

  2230.             if (flags&SWS_PRINT_INFO)

  2231.                 av_log(c, AV_LOG_INFO, "output Width is not a multiple of 32 -> no MMX2 scaler\n");

  2232.         }

  2233.         if (usesHFilter) c->canMMX2BeUsed=0;

  2234.     }

  2235.     else

  2236.         c->canMMX2BeUsed=0;

  2237. 

  2238.     c->chrXInc= ((c->chrSrcW<<16) + (c->chrDstW>>1))/c->chrDstW;

  2239.     c->chrYInc= ((c->chrSrcH<<16) + (c->chrDstH>>1))/c->chrDstH;

  2240. 

  2241.     // match pixel 0 of the src to pixel 0 of dst and match pixel n-2 of src to pixel n-2 of dst

  2242.     // but only for the FAST_BILINEAR mode otherwise do correct scaling

  2243.     // n-2 is the last chrominance sample available

  2244.     // this is not perfect, but no one should notice the difference, the more correct variant

  2245.     // would be like the vertical one, but that would require some special code for the

  2246.     // first and last pixel

  2247.     if (flags&SWS_FAST_BILINEAR)

  2248.     {

  2249.         if (c->canMMX2BeUsed)

  2250.         {

  2251.             c->lumXInc+= 20;

  2252.             c->chrXInc+= 20;

  2253.         }

  2254.         //we don't use the x86asm scaler if mmx is available

  2255.         else if (flags & SWS_CPU_CAPS_MMX)

  2256.         {

  2257.             c->lumXInc = ((srcW-2)<<16)/(dstW-2) - 20;

  2258.             c->chrXInc = ((c->chrSrcW-2)<<16)/(c->chrDstW-2) - 20;

  2259.         }

  2260.     }

  2261. 

  2262.     /* precalculate horizontal scaler filter coefficients */

  2263.     {

  2264.         const int filterAlign=

  2265.             (flags & SWS_CPU_CAPS_MMX) ? 4 :

  2266.             (flags & SWS_CPU_CAPS_ALTIVEC) ? 8 :

  2267.             1;

  2268. 

  2269.         initFilter(&c->hLumFilter, &c->hLumFilterPos, &c->hLumFilterSize, c->lumXInc,

  2270.                    srcW      ,       dstW, filterAlign, 1<<14,

  2271.                    (flags&SWS_BICUBLIN) ? (flags|SWS_BICUBIC)  : flags,

  2272.                    srcFilter->lumH, dstFilter->lumH, c->param);

  2273.         initFilter(&c->hChrFilter, &c->hChrFilterPos, &c->hChrFilterSize, c->chrXInc,

  2274.                    c->chrSrcW, c->chrDstW, filterAlign, 1<<14,

  2275.                    (flags&SWS_BICUBLIN) ? (flags|SWS_BILINEAR) : flags,

  2276.                    srcFilter->chrH, dstFilter->chrH, c->param);

  2277. 

  2278. #define MAX_FUNNY_CODE_SIZE 10000

  2279. #if defined(COMPILE_MMX2)

  2280. // can't downscale !!!

  2281.         if (c->canMMX2BeUsed && (flags & SWS_FAST_BILINEAR))

  2282.         {

  2283. #ifdef MAP_ANONYMOUS

  2284.             c->funnyYCode = (uint8_t*)mmap(NULL, MAX_FUNNY_CODE_SIZE, PROT_EXEC | PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, 0, 0);

  2285.             c->funnyUVCode = (uint8_t*)mmap(NULL, MAX_FUNNY_CODE_SIZE, PROT_EXEC | PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, 0, 0);

  2286. #else

  2287.             c->funnyYCode = av_malloc(MAX_FUNNY_CODE_SIZE);

  2288.             c->funnyUVCode = av_malloc(MAX_FUNNY_CODE_SIZE);

  2289. #endif

  2290. 

  2291.             c->lumMmx2Filter   = av_malloc((dstW        /8+8)*sizeof(int16_t));

  2292.             c->chrMmx2Filter   = av_malloc((c->chrDstW  /4+8)*sizeof(int16_t));

  2293.             c->lumMmx2FilterPos= av_malloc((dstW      /2/8+8)*sizeof(int32_t));

  2294.             c->chrMmx2FilterPos= av_malloc((c->chrDstW/2/4+8)*sizeof(int32_t));

  2295. 

  2296.             initMMX2HScaler(      dstW, c->lumXInc, c->funnyYCode , c->lumMmx2Filter, c->lumMmx2FilterPos, 8);

  2297.             initMMX2HScaler(c->chrDstW, c->chrXInc, c->funnyUVCode, c->chrMmx2Filter, c->chrMmx2FilterPos, 4);

  2298.         }

  2299. #endif /* defined(COMPILE_MMX2) */

  2300.     } // Init Horizontal stuff

  2301. 

  2302. 

  2303. 

  2304.     /* precalculate vertical scaler filter coefficients */

  2305.     {

  2306.         const int filterAlign=

  2307.             (flags & SWS_CPU_CAPS_MMX) && (flags & SWS_ACCURATE_RND) ? 2 :

  2308.             (flags & SWS_CPU_CAPS_ALTIVEC) ? 8 :

  2309.             1;

  2310. 

  2311.         initFilter(&c->vLumFilter, &c->vLumFilterPos, &c->vLumFilterSize, c->lumYInc,

  2312.                    srcH      ,        dstH, filterAlign, (1<<12)-4,

  2313.                    (flags&SWS_BICUBLIN) ? (flags|SWS_BICUBIC)  : flags,

  2314.                    srcFilter->lumV, dstFilter->lumV, c->param);

  2315.         initFilter(&c->vChrFilter, &c->vChrFilterPos, &c->vChrFilterSize, c->chrYInc,

  2316.                    c->chrSrcH, c->chrDstH, filterAlign, (1<<12)-4,

  2317.                    (flags&SWS_BICUBLIN) ? (flags|SWS_BILINEAR) : flags,

  2318.                    srcFilter->chrV, dstFilter->chrV, c->param);

  2319. 

  2320. #ifdef HAVE_ALTIVEC

  2321.         c->vYCoeffsBank = av_malloc(sizeof (vector signed short)*c->vLumFilterSize*c->dstH);

  2322.         c->vCCoeffsBank = av_malloc(sizeof (vector signed short)*c->vChrFilterSize*c->chrDstH);

  2323. 

  2324.         for (i=0;i<c->vLumFilterSize*c->dstH;i++) {

  2325.             int j;

  2326.             short *p = (short *)&c->vYCoeffsBank[i];

  2327.             for (j=0;j<8;j++)

  2328.                 p[j] = c->vLumFilter[i];

  2329.         }

  2330. 

  2331.         for (i=0;i<c->vChrFilterSize*c->chrDstH;i++) {

  2332.             int j;

  2333.             short *p = (short *)&c->vCCoeffsBank[i];

  2334.             for (j=0;j<8;j++)

  2335.                 p[j] = c->vChrFilter[i];

  2336.         }

  2337. #endif

  2338.     }

  2339. 

  2340.     // Calculate Buffer Sizes so that they won't run out while handling these damn slices

  2341.     c->vLumBufSize= c->vLumFilterSize;

  2342.     c->vChrBufSize= c->vChrFilterSize;

  2343.     for (i=0; i<dstH; i++)

  2344.     {

  2345.         int chrI= i*c->chrDstH / dstH;

  2346.         int nextSlice= FFMAX(c->vLumFilterPos[i   ] + c->vLumFilterSize - 1,

  2347.                            ((c->vChrFilterPos[chrI] + c->vChrFilterSize - 1)<<c->chrSrcVSubSample));

  2348. 

  2349.         nextSlice>>= c->chrSrcVSubSample;

  2350.         nextSlice<<= c->chrSrcVSubSample;

  2351.         if (c->vLumFilterPos[i   ] + c->vLumBufSize < nextSlice)

  2352.             c->vLumBufSize= nextSlice - c->vLumFilterPos[i];

  2353.         if (c->vChrFilterPos[chrI] + c->vChrBufSize < (nextSlice>>c->chrSrcVSubSample))

  2354.             c->vChrBufSize= (nextSlice>>c->chrSrcVSubSample) - c->vChrFilterPos[chrI];

  2355.     }

  2356. 

  2357.     // allocate pixbufs (we use dynamic allocation because otherwise we would need to

  2358.     c->lumPixBuf= av_malloc(c->vLumBufSize*2*sizeof(int16_t*));

  2359.     c->chrPixBuf= av_malloc(c->vChrBufSize*2*sizeof(int16_t*));

  2360.     //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)

  2361.     /* align at 16 bytes for AltiVec */

  2362.     for (i=0; i<c->vLumBufSize; i++)

  2363.         c->lumPixBuf[i]= c->lumPixBuf[i+c->vLumBufSize]= av_mallocz(VOF+1);

  2364.     for (i=0; i<c->vChrBufSize; i++)

  2365.         c->chrPixBuf[i]= c->chrPixBuf[i+c->vChrBufSize]= av_malloc((VOF+1)*2);

  2366. 

  2367.     //try to avoid drawing green stuff between the right end and the stride end

  2368.     for (i=0; i<c->vChrBufSize; i++) memset(c->chrPixBuf[i], 64, (VOF+1)*2);

  2369. 

  2370.     assert(2*VOFW == VOF);

  2371. 

  2372.     assert(c->chrDstH <= dstH);

  2373. 

  2374.     if (flags&SWS_PRINT_INFO)

  2375.     {

  2376. #ifdef DITHER1XBPP

  2377.         const char *dither= " dithered";

  2378. #else

  2379.         const char *dither= "";

  2380. #endif

  2381.         if (flags&SWS_FAST_BILINEAR)

  2382.             av_log(c, AV_LOG_INFO, "FAST_BILINEAR scaler, ");

  2383.         else if (flags&SWS_BILINEAR)

  2384.             av_log(c, AV_LOG_INFO, "BILINEAR scaler, ");

  2385.         else if (flags&SWS_BICUBIC)

  2386.             av_log(c, AV_LOG_INFO, "BICUBIC scaler, ");

  2387.         else if (flags&SWS_X)

  2388.             av_log(c, AV_LOG_INFO, "Experimental scaler, ");

  2389.         else if (flags&SWS_POINT)

  2390.             av_log(c, AV_LOG_INFO, "Nearest Neighbor / POINT scaler, ");

  2391.         else if (flags&SWS_AREA)

  2392.             av_log(c, AV_LOG_INFO, "Area Averageing scaler, ");

  2393.         else if (flags&SWS_BICUBLIN)

  2394.             av_log(c, AV_LOG_INFO, "luma BICUBIC / chroma BILINEAR scaler, ");

  2395.         else if (flags&SWS_GAUSS)

  2396.             av_log(c, AV_LOG_INFO, "Gaussian scaler, ");

  2397.         else if (flags&SWS_SINC)

  2398.             av_log(c, AV_LOG_INFO, "Sinc scaler, ");

  2399.         else if (flags&SWS_LANCZOS)

  2400.             av_log(c, AV_LOG_INFO, "Lanczos scaler, ");

  2401.         else if (flags&SWS_SPLINE)

  2402.             av_log(c, AV_LOG_INFO, "Bicubic spline scaler, ");

  2403.         else

  2404.             av_log(c, AV_LOG_INFO, "ehh flags invalid?! ");

  2405. 

  2406.         if (dstFormat==PIX_FMT_BGR555 || dstFormat==PIX_FMT_BGR565)

  2407.             av_log(c, AV_LOG_INFO, "from %s to%s %s ",

  2408.                    sws_format_name(srcFormat), dither, sws_format_name(dstFormat));

  2409.         else

  2410.             av_log(c, AV_LOG_INFO, "from %s to %s ",

  2411.                    sws_format_name(srcFormat), sws_format_name(dstFormat));

  2412. 

  2413.         if (flags & SWS_CPU_CAPS_MMX2)

  2414.             av_log(c, AV_LOG_INFO, "using MMX2\n");

  2415.         else if (flags & SWS_CPU_CAPS_3DNOW)

  2416.             av_log(c, AV_LOG_INFO, "using 3DNOW\n");

  2417.         else if (flags & SWS_CPU_CAPS_MMX)

  2418.             av_log(c, AV_LOG_INFO, "using MMX\n");

  2419.         else if (flags & SWS_CPU_CAPS_ALTIVEC)

  2420.             av_log(c, AV_LOG_INFO, "using AltiVec\n");

  2421.         else

  2422.             av_log(c, AV_LOG_INFO, "using C\n");

  2423.     }

  2424. 

  2425.     if (flags & SWS_PRINT_INFO)

  2426.     {

  2427.         if (flags & SWS_CPU_CAPS_MMX)

  2428.         {

  2429.             if (c->canMMX2BeUsed && (flags&SWS_FAST_BILINEAR))

  2430.                 av_log(c, AV_LOG_VERBOSE, "using FAST_BILINEAR MMX2 scaler for horizontal scaling\n");

  2431.             else

  2432.             {

  2433.                 if (c->hLumFilterSize==4)

  2434.                     av_log(c, AV_LOG_VERBOSE, "using 4-tap MMX scaler for horizontal luminance scaling\n");

  2435.                 else if (c->hLumFilterSize==8)

  2436.                     av_log(c, AV_LOG_VERBOSE, "using 8-tap MMX scaler for horizontal luminance scaling\n");

  2437.                 else

  2438.                     av_log(c, AV_LOG_VERBOSE, "using n-tap MMX scaler for horizontal luminance scaling\n");

  2439. 

  2440.                 if (c->hChrFilterSize==4)

  2441.                     av_log(c, AV_LOG_VERBOSE, "using 4-tap MMX scaler for horizontal chrominance scaling\n");

  2442.                 else if (c->hChrFilterSize==8)

  2443.                     av_log(c, AV_LOG_VERBOSE, "using 8-tap MMX scaler for horizontal chrominance scaling\n");

  2444.                 else

  2445.                     av_log(c, AV_LOG_VERBOSE, "using n-tap MMX scaler for horizontal chrominance scaling\n");

  2446.             }

  2447.         }

  2448.         else

  2449.         {

  2450. #if defined(ARCH_X86)

  2451.             av_log(c, AV_LOG_VERBOSE, "using X86-Asm scaler for horizontal scaling\n");

  2452. #else

  2453.             if (flags & SWS_FAST_BILINEAR)

  2454.                 av_log(c, AV_LOG_VERBOSE, "using FAST_BILINEAR C scaler for horizontal scaling\n");

  2455.             else

  2456.                 av_log(c, AV_LOG_VERBOSE, "using C scaler for horizontal scaling\n");

  2457. #endif

  2458.         }

  2459.         if (isPlanarYUV(dstFormat))

  2460.         {

  2461.             if (c->vLumFilterSize==1)

  2462.                 av_log(c, AV_LOG_VERBOSE, "using 1-tap %s \"scaler\" for vertical scaling (YV12 like)\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");

  2463.             else

  2464.                 av_log(c, AV_LOG_VERBOSE, "using n-tap %s scaler for vertical scaling (YV12 like)\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");

  2465.         }

  2466.         else

  2467.         {

  2468.             if (c->vLumFilterSize==1 && c->vChrFilterSize==2)

  2469.                 av_log(c, AV_LOG_VERBOSE, "using 1-tap %s \"scaler\" for vertical luminance scaling (BGR)\n"

  2470.                        "      2-tap scaler for vertical chrominance scaling (BGR)\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");

  2471.             else if (c->vLumFilterSize==2 && c->vChrFilterSize==2)

  2472.                 av_log(c, AV_LOG_VERBOSE, "using 2-tap linear %s scaler for vertical scaling (BGR)\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");

  2473.             else

  2474.                 av_log(c, AV_LOG_VERBOSE, "using n-tap %s scaler for vertical scaling (BGR)\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");

  2475.         }

  2476. 

  2477.         if (dstFormat==PIX_FMT_BGR24)

  2478.             av_log(c, AV_LOG_VERBOSE, "using %s YV12->BGR24 Converter\n",

  2479.                    (flags & SWS_CPU_CAPS_MMX2) ? "MMX2" : ((flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C"));

  2480.         else if (dstFormat==PIX_FMT_RGB32)

  2481.             av_log(c, AV_LOG_VERBOSE, "using %s YV12->BGR32 Converter\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");

  2482.         else if (dstFormat==PIX_FMT_BGR565)

  2483.             av_log(c, AV_LOG_VERBOSE, "using %s YV12->BGR16 Converter\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");

  2484.         else if (dstFormat==PIX_FMT_BGR555)

  2485.             av_log(c, AV_LOG_VERBOSE, "using %s YV12->BGR15 Converter\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");

  2486. 

  2487.         av_log(c, AV_LOG_VERBOSE, "%dx%d -> %dx%d\n", srcW, srcH, dstW, dstH);

  2488.     }

  2489.     if (flags & SWS_PRINT_INFO)

  2490.     {

  2491.         av_log(c, AV_LOG_DEBUG, "Lum srcW=%d srcH=%d dstW=%d dstH=%d xInc=%d yInc=%d\n",

  2492.                c->srcW, c->srcH, c->dstW, c->dstH, c->lumXInc, c->lumYInc);

  2493.         av_log(c, AV_LOG_DEBUG, "Chr srcW=%d srcH=%d dstW=%d dstH=%d xInc=%d yInc=%d\n",

  2494.                c->chrSrcW, c->chrSrcH, c->chrDstW, c->chrDstH, c->chrXInc, c->chrYInc);

  2495.     }

  2496. 

  2497.     c->swScale= getSwsFunc(flags);

  2498.     return c;

  2499. }

  2500. 

  2501. /**

  2502.  * swscale wrapper, so we don't need to export the SwsContext.

  2503.  * assumes planar YUV to be in YUV order instead of YVU

  2504.  */

  2505. int sws_scale(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  2506.               int srcSliceH, uint8_t* dst[], int dstStride[]){

  2507.     int i;

  2508.     uint8_t* src2[4]= {src[0], src[1], src[2]};

  2509.     uint32_t pal[256];

  2510.     if (c->sliceDir == 0 && srcSliceY != 0 && srcSliceY + srcSliceH != c->srcH) {

  2511.         av_log(c, AV_LOG_ERROR, "Slices start in the middle!\n");

  2512.         return 0;

  2513.     }

  2514.     if (c->sliceDir == 0) {

  2515.         if (srcSliceY == 0) c->sliceDir = 1; else c->sliceDir = -1;

  2516.     }

  2517. 

  2518.     if (c->srcFormat == PIX_FMT_PAL8){

  2519.         for (i=0; i<256; i++){

  2520.             int p= ((uint32_t*)(src[1]))[i];

  2521.             int r= (p>>16)&0xFF;

  2522.             int g= (p>> 8)&0xFF;

  2523.             int b=  p     &0xFF;

  2524.             int y= av_clip_uint8(((RY*r + GY*g + BY*b)>>RGB2YUV_SHIFT) + 16 );

  2525.             int u= av_clip_uint8(((RU*r + GU*g + BU*b)>>RGB2YUV_SHIFT) + 128);

  2526.             int v= av_clip_uint8(((RV*r + GV*g + BV*b)>>RGB2YUV_SHIFT) + 128);

  2527.             pal[i]= y + (u<<8) + (v<<16);

  2528.         }

  2529.         src2[1]= (uint8_t*)pal;

  2530.     }

  2531. 

  2532.     // copy strides, so they can safely be modified

  2533.     if (c->sliceDir == 1) {

  2534.         // slices go from top to bottom

  2535.         int srcStride2[4]= {srcStride[0], srcStride[1], srcStride[2]};

  2536.         int dstStride2[4]= {dstStride[0], dstStride[1], dstStride[2]};

  2537.         return c->swScale(c, src2, srcStride2, srcSliceY, srcSliceH, dst, dstStride2);

  2538.     } else {

  2539.         // slices go from bottom to top => we flip the image internally

  2540.         uint8_t* dst2[4]= {dst[0] + (c->dstH-1)*dstStride[0],

  2541.                            dst[1] + ((c->dstH>>c->chrDstVSubSample)-1)*dstStride[1],

  2542.                            dst[2] + ((c->dstH>>c->chrDstVSubSample)-1)*dstStride[2]};

  2543.         int srcStride2[4]= {-srcStride[0], -srcStride[1], -srcStride[2]};

  2544.         int dstStride2[4]= {-dstStride[0], -dstStride[1], -dstStride[2]};

  2545. 

  2546.         src2[0] += (srcSliceH-1)*srcStride[0];

  2547.         if (c->srcFormat != PIX_FMT_PAL8)

  2548.             src2[1] += ((srcSliceH>>c->chrSrcVSubSample)-1)*srcStride[1];

  2549.         src2[2] += ((srcSliceH>>c->chrSrcVSubSample)-1)*srcStride[2];

  2550. 

  2551.         return c->swScale(c, src2, srcStride2, c->srcH-srcSliceY-srcSliceH, srcSliceH, dst2, dstStride2);

  2552.     }

  2553. }

  2554. 

  2555. /**

  2556.  * swscale wrapper, so we don't need to export the SwsContext

  2557.  */

  2558. int sws_scale_ordered(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  2559.                       int srcSliceH, uint8_t* dst[], int dstStride[]){

  2560.     return sws_scale(c, src, srcStride, srcSliceY, srcSliceH, dst, dstStride);

  2561. }

  2562. 

  2563. SwsFilter *sws_getDefaultFilter(float lumaGBlur, float chromaGBlur,

  2564.                                 float lumaSharpen, float chromaSharpen,

  2565.                                 float chromaHShift, float chromaVShift,

  2566.                                 int verbose)

  2567. {

  2568.     SwsFilter *filter= av_malloc(sizeof(SwsFilter));

  2569. 

  2570.     if (lumaGBlur!=0.0){

  2571.         filter->lumH= sws_getGaussianVec(lumaGBlur, 3.0);

  2572.         filter->lumV= sws_getGaussianVec(lumaGBlur, 3.0);

  2573.     }else{

  2574.         filter->lumH= sws_getIdentityVec();

  2575.         filter->lumV= sws_getIdentityVec();

  2576.     }

  2577. 

  2578.     if (chromaGBlur!=0.0){

  2579.         filter->chrH= sws_getGaussianVec(chromaGBlur, 3.0);

  2580.         filter->chrV= sws_getGaussianVec(chromaGBlur, 3.0);

  2581.     }else{

  2582.         filter->chrH= sws_getIdentityVec();

  2583.         filter->chrV= sws_getIdentityVec();

  2584.     }

  2585. 

  2586.     if (chromaSharpen!=0.0){

  2587.         SwsVector *id= sws_getIdentityVec();

  2588.         sws_scaleVec(filter->chrH, -chromaSharpen);

  2589.         sws_scaleVec(filter->chrV, -chromaSharpen);

  2590.         sws_addVec(filter->chrH, id);

  2591.         sws_addVec(filter->chrV, id);

  2592.         sws_freeVec(id);

  2593.     }

  2594. 

  2595.     if (lumaSharpen!=0.0){

  2596.         SwsVector *id= sws_getIdentityVec();

  2597.         sws_scaleVec(filter->lumH, -lumaSharpen);

  2598.         sws_scaleVec(filter->lumV, -lumaSharpen);

  2599.         sws_addVec(filter->lumH, id);

  2600.         sws_addVec(filter->lumV, id);

  2601.         sws_freeVec(id);

  2602.     }

  2603. 

  2604.     if (chromaHShift != 0.0)

  2605.         sws_shiftVec(filter->chrH, (int)(chromaHShift+0.5));

  2606. 

  2607.     if (chromaVShift != 0.0)

  2608.         sws_shiftVec(filter->chrV, (int)(chromaVShift+0.5));

  2609. 

  2610.     sws_normalizeVec(filter->chrH, 1.0);

  2611.     sws_normalizeVec(filter->chrV, 1.0);

  2612.     sws_normalizeVec(filter->lumH, 1.0);

  2613.     sws_normalizeVec(filter->lumV, 1.0);

  2614. 

  2615.     if (verbose) sws_printVec(filter->chrH);

  2616.     if (verbose) sws_printVec(filter->lumH);

  2617. 

  2618.     return filter;

  2619. }

  2620. 

  2621. /**

  2622.  * returns a normalized gaussian curve used to filter stuff

  2623.  * quality=3 is high quality, lowwer is lowwer quality

  2624.  */

  2625. SwsVector *sws_getGaussianVec(double variance, double quality){

  2626.     const int length= (int)(variance*quality + 0.5) | 1;

  2627.     int i;

  2628.     double *coeff= av_malloc(length*sizeof(double));

  2629.     double middle= (length-1)*0.5;

  2630.     SwsVector *vec= av_malloc(sizeof(SwsVector));

  2631. 

  2632.     vec->coeff= coeff;

  2633.     vec->length= length;

  2634. 

  2635.     for (i=0; i<length; i++)

  2636.     {

  2637.         double dist= i-middle;

  2638.         coeff[i]= exp(-dist*dist/(2*variance*variance)) / sqrt(2*variance*PI);

  2639.     }

  2640. 

  2641.     sws_normalizeVec(vec, 1.0);

  2642. 

  2643.     return vec;

  2644. }

  2645. 

  2646. SwsVector *sws_getConstVec(double c, int length){

  2647.     int i;

  2648.     double *coeff= av_malloc(length*sizeof(double));

  2649.     SwsVector *vec= av_malloc(sizeof(SwsVector));

  2650. 

  2651.     vec->coeff= coeff;

  2652.     vec->length= length;

  2653. 

  2654.     for (i=0; i<length; i++)

  2655.         coeff[i]= c;

  2656. 

  2657.     return vec;

  2658. }

  2659. 

  2660. 

  2661. SwsVector *sws_getIdentityVec(void){

  2662.     return sws_getConstVec(1.0, 1);

  2663. }

  2664. 

  2665. double sws_dcVec(SwsVector *a){

  2666.     int i;

  2667.     double sum=0;

  2668. 

  2669.     for (i=0; i<a->length; i++)

  2670.         sum+= a->coeff[i];

  2671. 

  2672.     return sum;

  2673. }

  2674. 

  2675. void sws_scaleVec(SwsVector *a, double scalar){

  2676.     int i;

  2677. 

  2678.     for (i=0; i<a->length; i++)

  2679.         a->coeff[i]*= scalar;

  2680. }

  2681. 

  2682. void sws_normalizeVec(SwsVector *a, double height){

  2683.     sws_scaleVec(a, height/sws_dcVec(a));

  2684. }

  2685. 

  2686. static SwsVector *sws_getConvVec(SwsVector *a, SwsVector *b){

  2687.     int length= a->length + b->length - 1;

  2688.     double *coeff= av_malloc(length*sizeof(double));

  2689.     int i, j;

  2690.     SwsVector *vec= av_malloc(sizeof(SwsVector));

  2691. 

  2692.     vec->coeff= coeff;

  2693.     vec->length= length;

  2694. 

  2695.     for (i=0; i<length; i++) coeff[i]= 0.0;

  2696. 

  2697.     for (i=0; i<a->length; i++)

  2698.     {

  2699.         for (j=0; j<b->length; j++)

  2700.         {

  2701.             coeff[i+j]+= a->coeff[i]*b->coeff[j];

  2702.         }

  2703.     }

  2704. 

  2705.     return vec;

  2706. }

  2707. 

  2708. static SwsVector *sws_sumVec(SwsVector *a, SwsVector *b){

  2709.     int length= FFMAX(a->length, b->length);

  2710.     double *coeff= av_malloc(length*sizeof(double));

  2711.     int i;

  2712.     SwsVector *vec= av_malloc(sizeof(SwsVector));

  2713. 

  2714.     vec->coeff= coeff;

  2715.     vec->length= length;

  2716. 

  2717.     for (i=0; i<length; i++) coeff[i]= 0.0;

  2718. 

  2719.     for (i=0; i<a->length; i++) coeff[i + (length-1)/2 - (a->length-1)/2]+= a->coeff[i];

  2720.     for (i=0; i<b->length; i++) coeff[i + (length-1)/2 - (b->length-1)/2]+= b->coeff[i];

  2721. 

  2722.     return vec;

  2723. }

  2724. 

  2725. static SwsVector *sws_diffVec(SwsVector *a, SwsVector *b){

  2726.     int length= FFMAX(a->length, b->length);

  2727.     double *coeff= av_malloc(length*sizeof(double));

  2728.     int i;

  2729.     SwsVector *vec= av_malloc(sizeof(SwsVector));

  2730. 

  2731.     vec->coeff= coeff;

  2732.     vec->length= length;

  2733. 

  2734.     for (i=0; i<length; i++) coeff[i]= 0.0;

  2735. 

  2736.     for (i=0; i<a->length; i++) coeff[i + (length-1)/2 - (a->length-1)/2]+= a->coeff[i];

  2737.     for (i=0; i<b->length; i++) coeff[i + (length-1)/2 - (b->length-1)/2]-= b->coeff[i];

  2738. 

  2739.     return vec;

  2740. }

  2741. 

  2742. /* shift left / or right if "shift" is negative */

  2743. static SwsVector *sws_getShiftedVec(SwsVector *a, int shift){

  2744.     int length= a->length + FFABS(shift)*2;

  2745.     double *coeff= av_malloc(length*sizeof(double));

  2746.     int i;

  2747.     SwsVector *vec= av_malloc(sizeof(SwsVector));

  2748. 

  2749.     vec->coeff= coeff;

  2750.     vec->length= length;

  2751. 

  2752.     for (i=0; i<length; i++) coeff[i]= 0.0;

  2753. 

  2754.     for (i=0; i<a->length; i++)

  2755.     {

  2756.         coeff[i + (length-1)/2 - (a->length-1)/2 - shift]= a->coeff[i];

  2757.     }

  2758. 

  2759.     return vec;

  2760. }

  2761. 

  2762. void sws_shiftVec(SwsVector *a, int shift){

  2763.     SwsVector *shifted= sws_getShiftedVec(a, shift);

  2764.     av_free(a->coeff);

  2765.     a->coeff= shifted->coeff;

  2766.     a->length= shifted->length;

  2767.     av_free(shifted);

  2768. }

  2769. 

  2770. void sws_addVec(SwsVector *a, SwsVector *b){

  2771.     SwsVector *sum= sws_sumVec(a, b);

  2772.     av_free(a->coeff);

  2773.     a->coeff= sum->coeff;

  2774.     a->length= sum->length;

  2775.     av_free(sum);

  2776. }

  2777. 

  2778. void sws_subVec(SwsVector *a, SwsVector *b){

  2779.     SwsVector *diff= sws_diffVec(a, b);

  2780.     av_free(a->coeff);

  2781.     a->coeff= diff->coeff;

  2782.     a->length= diff->length;

  2783.     av_free(diff);

  2784. }

  2785. 

  2786. void sws_convVec(SwsVector *a, SwsVector *b){

  2787.     SwsVector *conv= sws_getConvVec(a, b);

  2788.     av_free(a->coeff);

  2789.     a->coeff= conv->coeff;

  2790.     a->length= conv->length;

  2791.     av_free(conv);

  2792. }

  2793. 

  2794. SwsVector *sws_cloneVec(SwsVector *a){

  2795.     double *coeff= av_malloc(a->length*sizeof(double));

  2796.     int i;

  2797.     SwsVector *vec= av_malloc(sizeof(SwsVector));

  2798. 

  2799.     vec->coeff= coeff;

  2800.     vec->length= a->length;

  2801. 

  2802.     for (i=0; i<a->length; i++) coeff[i]= a->coeff[i];

  2803. 

  2804.     return vec;

  2805. }

  2806. 

  2807. void sws_printVec(SwsVector *a){

  2808.     int i;

  2809.     double max=0;

  2810.     double min=0;

  2811.     double range;

  2812. 

  2813.     for (i=0; i<a->length; i++)

  2814.         if (a->coeff[i]>max) max= a->coeff[i];

  2815. 

  2816.     for (i=0; i<a->length; i++)

  2817.         if (a->coeff[i]<min) min= a->coeff[i];

  2818. 

  2819.     range= max - min;

  2820. 

  2821.     for (i=0; i<a->length; i++)

  2822.     {

  2823.         int x= (int)((a->coeff[i]-min)*60.0/range +0.5);

  2824.         av_log(NULL, AV_LOG_DEBUG, "%1.3f ", a->coeff[i]);

  2825.         for (;x>0; x--) av_log(NULL, AV_LOG_DEBUG, " ");

  2826.         av_log(NULL, AV_LOG_DEBUG, "|\n");

  2827.     }

  2828. }

  2829. 

  2830. void sws_freeVec(SwsVector *a){

  2831.     if (!a) return;

  2832.     av_freep(&a->coeff);

  2833.     a->length=0;

  2834.     av_free(a);

  2835. }

  2836. 

  2837. void sws_freeFilter(SwsFilter *filter){

  2838.     if (!filter) return;

  2839. 

  2840.     if (filter->lumH) sws_freeVec(filter->lumH);

  2841.     if (filter->lumV) sws_freeVec(filter->lumV);

  2842.     if (filter->chrH) sws_freeVec(filter->chrH);

  2843.     if (filter->chrV) sws_freeVec(filter->chrV);

  2844.     av_free(filter);

  2845. }

  2846. 

  2847. 

  2848. void sws_freeContext(SwsContext *c){

  2849.     int i;

  2850.     if (!c) return;

  2851. 

  2852.     if (c->lumPixBuf)

  2853.     {

  2854.         for (i=0; i<c->vLumBufSize; i++)

  2855.             av_freep(&c->lumPixBuf[i]);

  2856.         av_freep(&c->lumPixBuf);

  2857.     }

  2858. 

  2859.     if (c->chrPixBuf)

  2860.     {

  2861.         for (i=0; i<c->vChrBufSize; i++)

  2862.             av_freep(&c->chrPixBuf[i]);

  2863.         av_freep(&c->chrPixBuf);

  2864.     }

  2865. 

  2866.     av_freep(&c->vLumFilter);

  2867.     av_freep(&c->vChrFilter);

  2868.     av_freep(&c->hLumFilter);

  2869.     av_freep(&c->hChrFilter);

  2870. #ifdef HAVE_ALTIVEC

  2871.     av_freep(&c->vYCoeffsBank);

  2872.     av_freep(&c->vCCoeffsBank);

  2873. #endif

  2874. 

  2875.     av_freep(&c->vLumFilterPos);

  2876.     av_freep(&c->vChrFilterPos);

  2877.     av_freep(&c->hLumFilterPos);

  2878.     av_freep(&c->hChrFilterPos);

  2879. 

  2880. #if defined(ARCH_X86) && defined(CONFIG_GPL)

  2881. #ifdef MAP_ANONYMOUS

  2882.     if (c->funnyYCode) munmap(c->funnyYCode, MAX_FUNNY_CODE_SIZE);

  2883.     if (c->funnyUVCode) munmap(c->funnyUVCode, MAX_FUNNY_CODE_SIZE);

  2884. #else

  2885.     av_free(c->funnyYCode);

  2886.     av_free(c->funnyUVCode);

  2887. #endif

  2888.     c->funnyYCode=NULL;

  2889.     c->funnyUVCode=NULL;

  2890. #endif /* defined(ARCH_X86) */

  2891. 

  2892.     av_freep(&c->lumMmx2Filter);

  2893.     av_freep(&c->chrMmx2Filter);

  2894.     av_freep(&c->lumMmx2FilterPos);

  2895.     av_freep(&c->chrMmx2FilterPos);

  2896.     av_freep(&c->yuvTable);

  2897. 

  2898.     av_free(c);

  2899. }

  2900. 

  2901. /**

  2902.  * Checks if context is valid or reallocs a new one instead.

  2903.  * If context is NULL, just calls sws_getContext() to get a new one.

  2904.  * Otherwise, checks if the parameters are the same already saved in context.

  2905.  * If that is the case, returns the current context.

  2906.  * Otherwise, frees context and gets a new one.

  2907.  *

  2908.  * Be warned that srcFilter, dstFilter are not checked, they are

  2909.  * asumed to remain valid.

  2910.  */

  2911. struct SwsContext *sws_getCachedContext(struct SwsContext *context,

  2912.                                         int srcW, int srcH, int srcFormat,

  2913.                                         int dstW, int dstH, int dstFormat, int flags,

  2914.                                         SwsFilter *srcFilter, SwsFilter *dstFilter, double *param)

  2915. {

  2916.     static const double default_param[2] = {SWS_PARAM_DEFAULT, SWS_PARAM_DEFAULT};

  2917. 

  2918.     if (!param)

  2919.         param = default_param;

  2920. 

  2921.     if (context) {

  2922.         if (context->srcW != srcW || context->srcH != srcH ||

  2923.             context->srcFormat != srcFormat ||

  2924.             context->dstW != dstW || context->dstH != dstH ||

  2925.             context->dstFormat != dstFormat || context->flags != flags ||

  2926.             context->param[0] != param[0] || context->param[1] != param[1])

  2927.         {

  2928.             sws_freeContext(context);

  2929.             context = NULL;

  2930.         }

  2931.     }

  2932.     if (!context) {

  2933.         return sws_getContext(srcW, srcH, srcFormat,

  2934.                               dstW, dstH, dstFormat, flags,

  2935.                               srcFilter, dstFilter, param);

  2936.     }

  2937.     return context;

  2938. }