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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. #undef MOVNTQ

  77. #undef PAVGB

  78. 

  79. //#undef HAVE_MMX2

  80. //#define HAVE_3DNOW

  81. //#undef HAVE_MMX

  82. //#undef ARCH_X86

  83. //#define WORDS_BIGENDIAN

  84. #define DITHER1XBPP

  85. 

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

  87. 

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

  89. 

  90. #ifdef M_PI

  91. #define PI M_PI

  92. #else

  93. #define PI 3.14159265358979323846

  94. #endif

  95. 

  96. #define isSupportedIn(x)    (       \

  97.            (x)==PIX_FMT_YUV420P     \

  98.         || (x)==PIX_FMT_YUVA420P    \

  99.         || (x)==PIX_FMT_YUYV422     \

  100.         || (x)==PIX_FMT_UYVY422     \

  101.         || (x)==PIX_FMT_RGB32       \

  102.         || (x)==PIX_FMT_BGR24       \

  103.         || (x)==PIX_FMT_BGR565      \

  104.         || (x)==PIX_FMT_BGR555      \

  105.         || (x)==PIX_FMT_BGR32       \

  106.         || (x)==PIX_FMT_RGB24       \

  107.         || (x)==PIX_FMT_RGB565      \

  108.         || (x)==PIX_FMT_RGB555      \

  109.         || (x)==PIX_FMT_GRAY8       \

  110.         || (x)==PIX_FMT_YUV410P     \

  111.         || (x)==PIX_FMT_GRAY16BE    \

  112.         || (x)==PIX_FMT_GRAY16LE    \

  113.         || (x)==PIX_FMT_YUV444P     \

  114.         || (x)==PIX_FMT_YUV422P     \

  115.         || (x)==PIX_FMT_YUV411P     \

  116.         || (x)==PIX_FMT_PAL8        \

  117.         || (x)==PIX_FMT_BGR8        \

  118.         || (x)==PIX_FMT_RGB8        \

  119.         || (x)==PIX_FMT_BGR4_BYTE   \

  120.         || (x)==PIX_FMT_RGB4_BYTE   \

  121.         || (x)==PIX_FMT_YUV440P     \

  122.     )

  123. #define isSupportedOut(x)   (       \

  124.            (x)==PIX_FMT_YUV420P     \

  125.         || (x)==PIX_FMT_YUYV422     \

  126.         || (x)==PIX_FMT_UYVY422     \

  127.         || (x)==PIX_FMT_YUV444P     \

  128.         || (x)==PIX_FMT_YUV422P     \

  129.         || (x)==PIX_FMT_YUV411P     \

  130.         || isRGB(x)                 \

  131.         || isBGR(x)                 \

  132.         || (x)==PIX_FMT_NV12        \

  133.         || (x)==PIX_FMT_NV21        \

  134.         || (x)==PIX_FMT_GRAY16BE    \

  135.         || (x)==PIX_FMT_GRAY16LE    \

  136.         || (x)==PIX_FMT_GRAY8       \

  137.         || (x)==PIX_FMT_YUV410P     \

  138.     )

  139. #define isPacked(x)         (       \

  140.            (x)==PIX_FMT_PAL8        \

  141.         || (x)==PIX_FMT_YUYV422     \

  142.         || (x)==PIX_FMT_UYVY422     \

  143.         || isRGB(x)                 \

  144.         || isBGR(x)                 \

  145.     )

  146. 

  147. #define RGB2YUV_SHIFT 16

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

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

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

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

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

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

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

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

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

  157. 

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

  159. 

  160. /*

  161. NOTES

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

  163. 

  164. TODO

  165. more intelligent misalignment avoidance for the horizontal scaler

  166. write special vertical cubic upscale version

  167. Optimize C code (yv12 / minmax)

  168. add support for packed pixel yuv input & output

  169. add support for Y8 output

  170. optimize bgr24 & bgr32

  171. add BGR4 output support

  172. write special BGR->BGR scaler

  173. */

  174. 

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

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

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

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

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

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

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

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

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

  184. 

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

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

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

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

  189. 

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

  191.         0x0103010301030103LL,

  192.         0x0200020002000200LL,};

  193. 

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

  195.         0x0602060206020602LL,

  196.         0x0004000400040004LL,};

  197. 

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

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

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

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

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

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

  204. 

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

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

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

  208. 

  209. #ifdef FAST_BGR2YV12

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

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

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

  213. #else

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

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

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

  217. #endif /* FAST_BGR2YV12 */

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

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

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

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

  222. 

  223. // clipping helper table for C implementations:

  224. static unsigned char clip_table[768];

  225. 

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

  227. 

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

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

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

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

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

  233. 

  234. const char *sws_format_name(enum PixelFormat format)

  235. {

  236.     switch (format) {

  237.         case PIX_FMT_YUV420P:

  238.             return "yuv420p";

  239.         case PIX_FMT_YUVA420P:

  240.             return "yuva420p";

  241.         case PIX_FMT_YUYV422:

  242.             return "yuyv422";

  243.         case PIX_FMT_RGB24:

  244.             return "rgb24";

  245.         case PIX_FMT_BGR24:

  246.             return "bgr24";

  247.         case PIX_FMT_YUV422P:

  248.             return "yuv422p";

  249.         case PIX_FMT_YUV444P:

  250.             return "yuv444p";

  251.         case PIX_FMT_RGB32:

  252.             return "rgb32";

  253.         case PIX_FMT_YUV410P:

  254.             return "yuv410p";

  255.         case PIX_FMT_YUV411P:

  256.             return "yuv411p";

  257.         case PIX_FMT_RGB565:

  258.             return "rgb565";

  259.         case PIX_FMT_RGB555:

  260.             return "rgb555";

  261.         case PIX_FMT_GRAY16BE:

  262.             return "gray16be";

  263.         case PIX_FMT_GRAY16LE:

  264.             return "gray16le";

  265.         case PIX_FMT_GRAY8:

  266.             return "gray8";

  267.         case PIX_FMT_MONOWHITE:

  268.             return "mono white";

  269.         case PIX_FMT_MONOBLACK:

  270.             return "mono black";

  271.         case PIX_FMT_PAL8:

  272.             return "Palette";

  273.         case PIX_FMT_YUVJ420P:

  274.             return "yuvj420p";

  275.         case PIX_FMT_YUVJ422P:

  276.             return "yuvj422p";

  277.         case PIX_FMT_YUVJ444P:

  278.             return "yuvj444p";

  279.         case PIX_FMT_XVMC_MPEG2_MC:

  280.             return "xvmc_mpeg2_mc";

  281.         case PIX_FMT_XVMC_MPEG2_IDCT:

  282.             return "xvmc_mpeg2_idct";

  283.         case PIX_FMT_UYVY422:

  284.             return "uyvy422";

  285.         case PIX_FMT_UYYVYY411:

  286.             return "uyyvyy411";

  287.         case PIX_FMT_RGB32_1:

  288.             return "rgb32x";

  289.         case PIX_FMT_BGR32_1:

  290.             return "bgr32x";

  291.         case PIX_FMT_BGR32:

  292.             return "bgr32";

  293.         case PIX_FMT_BGR565:

  294.             return "bgr565";

  295.         case PIX_FMT_BGR555:

  296.             return "bgr555";

  297.         case PIX_FMT_BGR8:

  298.             return "bgr8";

  299.         case PIX_FMT_BGR4:

  300.             return "bgr4";

  301.         case PIX_FMT_BGR4_BYTE:

  302.             return "bgr4 byte";

  303.         case PIX_FMT_RGB8:

  304.             return "rgb8";

  305.         case PIX_FMT_RGB4:

  306.             return "rgb4";

  307.         case PIX_FMT_RGB4_BYTE:

  308.             return "rgb4 byte";

  309.         case PIX_FMT_NV12:

  310.             return "nv12";

  311.         case PIX_FMT_NV21:

  312.             return "nv21";

  313.         case PIX_FMT_YUV440P:

  314.             return "yuv440p";

  315.         default:

  316.             return "Unknown format";

  317.     }

  318. }

  319. 

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

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

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

  323. {

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

  325.     int i;

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

  327.     {

  328.         int val=1<<18;

  329.         int j;

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

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

  332. 

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

  334.     }

  335. 

  336.     if (uDest)

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

  338.         {

  339.             int u=1<<18;

  340.             int v=1<<18;

  341.             int j;

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

  343.             {

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

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

  346.             }

  347. 

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

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

  350.         }

  351. }

  352. 

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

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

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

  356. {

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

  358.     int i;

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

  360.     {

  361.         int val=1<<18;

  362.         int j;

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

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

  365. 

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

  367.     }

  368. 

  369.     if (!uDest)

  370.         return;

  371. 

  372.     if (dstFormat == PIX_FMT_NV12)

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

  374.         {

  375.             int u=1<<18;

  376.             int v=1<<18;

  377.             int j;

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

  379.             {

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

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

  382.             }

  383. 

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

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

  386.         }

  387.     else

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

  389.         {

  390.             int u=1<<18;

  391.             int v=1<<18;

  392.             int j;

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

  394.             {

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

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

  397.             }

  398. 

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

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

  401.         }

  402. }

  403. 

  404. #define YSCALE_YUV_2_PACKEDX_C(type) \

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

  406.         int j;\

  407.         int Y1 = 1<<18;\

  408.         int Y2 = 1<<18;\

  409.         int U  = 1<<18;\

  410.         int V  = 1<<18;\

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

  412.         const int i2= 2*i;\

  413.         \

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

  415.         {\

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

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

  418.         }\

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

  420.         {\

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

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

  423.         }\

  424.         Y1>>=19;\

  425.         Y2>>=19;\

  426.         U >>=19;\

  427.         V >>=19;\

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

  429.         {\

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

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

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

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

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

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

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

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

  438.         }

  439. 

  440. #define YSCALE_YUV_2_RGBX_C(type) \

  441.     YSCALE_YUV_2_PACKEDX_C(type)  \

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

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

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

  445. 

  446. #define YSCALE_YUV_2_PACKED2_C   \

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

  448.         const int i2= 2*i;       \

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

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

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

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

  453. 

  454. #define YSCALE_YUV_2_RGB2_C(type) \

  455.     YSCALE_YUV_2_PACKED2_C\

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

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

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

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

  460. 

  461. #define YSCALE_YUV_2_PACKED1_C \

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

  463.         const int i2= 2*i;\

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

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

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

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

  468. 

  469. #define YSCALE_YUV_2_RGB1_C(type) \

  470.     YSCALE_YUV_2_PACKED1_C\

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

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

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

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

  475. 

  476. #define YSCALE_YUV_2_PACKED1B_C \

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

  478.         const int i2= 2*i;\

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

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

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

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

  483. 

  484. #define YSCALE_YUV_2_RGB1B_C(type) \

  485.     YSCALE_YUV_2_PACKED1B_C\

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

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

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

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

  490. 

  491. #define YSCALE_YUV_2_ANYRGB_C(func, func2)\

  492.     switch(c->dstFormat)\

  493.     {\

  494.     case PIX_FMT_RGB32:\

  495.     case PIX_FMT_BGR32:\

  496.         func(uint32_t)\

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

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

  499.         }                \

  500.         break;\

  501.     case PIX_FMT_RGB24:\

  502.         func(uint8_t)\

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

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

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

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

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

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

  509.             dest+=6;\

  510.         }\

  511.         break;\

  512.     case PIX_FMT_BGR24:\

  513.         func(uint8_t)\

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

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

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

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

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

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

  520.             dest+=6;\

  521.         }\

  522.         break;\

  523.     case PIX_FMT_RGB565:\

  524.     case PIX_FMT_BGR565:\

  525.         {\

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

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

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

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

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

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

  532.             func(uint16_t)\

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

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

  535.             }\

  536.         }\

  537.         break;\

  538.     case PIX_FMT_RGB555:\

  539.     case PIX_FMT_BGR555:\

  540.         {\

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

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

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

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

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

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

  547.             func(uint16_t)\

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

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

  550.             }\

  551.         }\

  552.         break;\

  553.     case PIX_FMT_RGB8:\

  554.     case PIX_FMT_BGR8:\

  555.         {\

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

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

  558.             func(uint8_t)\

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

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

  561.             }\

  562.         }\

  563.         break;\

  564.     case PIX_FMT_RGB4:\

  565.     case PIX_FMT_BGR4:\

  566.         {\

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

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

  569.             func(uint8_t)\

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

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

  572.             }\

  573.         }\

  574.         break;\

  575.     case PIX_FMT_RGB4_BYTE:\

  576.     case PIX_FMT_BGR4_BYTE:\

  577.         {\

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

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

  580.             func(uint8_t)\

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

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

  583.             }\

  584.         }\

  585.         break;\

  586.     case PIX_FMT_MONOBLACK:\

  587.         {\

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

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

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

  591.                 int acc;\

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

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

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

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

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

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

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

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

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

  601.                 dest++;\

  602.             }\

  603. \

  604. /*\

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

  606. {\

  607.             int acc=0;\

  608.             int left=0;\

  609.             static int top[1024];\

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

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

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

  613.             int topLeft=0;\

  614.             int shift=0;\

  615.             int count=0;\

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

  617.             int error_new=0;\

  618.             int error_in3=0;\

  619.             int f=0;\

  620.             \

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

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

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

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

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

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

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

  628. \

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

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

  631.                 f= error_new - error_in3*4;\

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

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

  634. \

  635.                 topLeft= top[i];\

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

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

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

  639. \

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

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

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

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

  644.                 }\

  645.             }\

  646. }\

  647. */\

  648.         }\

  649.         break;\

  650.     case PIX_FMT_YUYV422:\

  651.         func2\

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

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

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

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

  656.         }                \

  657.         break;\

  658.     case PIX_FMT_UYVY422:\

  659.         func2\

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

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

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

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

  664.         }                \

  665.         break;\

  666.     }\

  667. 

  668. 

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

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

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

  672. {

  673.     int i;

  674.     switch(c->dstFormat)

  675.     {

  676.     case PIX_FMT_BGR32:

  677.     case PIX_FMT_RGB32:

  678.         YSCALE_YUV_2_RGBX_C(uint32_t)

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

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

  681.         }

  682.         break;

  683.     case PIX_FMT_RGB24:

  684.         YSCALE_YUV_2_RGBX_C(uint8_t)

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

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

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

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

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

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

  691.             dest+=6;

  692.         }

  693.         break;

  694.     case PIX_FMT_BGR24:

  695.         YSCALE_YUV_2_RGBX_C(uint8_t)

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

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

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

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

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

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

  702.             dest+=6;

  703.         }

  704.         break;

  705.     case PIX_FMT_RGB565:

  706.     case PIX_FMT_BGR565:

  707.         {

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

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

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

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

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

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

  714.             YSCALE_YUV_2_RGBX_C(uint16_t)

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

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

  717.             }

  718.         }

  719.         break;

  720.     case PIX_FMT_RGB555:

  721.     case PIX_FMT_BGR555:

  722.         {

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

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

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

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

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

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

  729.             YSCALE_YUV_2_RGBX_C(uint16_t)

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

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

  732.             }

  733.         }

  734.         break;

  735.     case PIX_FMT_RGB8:

  736.     case PIX_FMT_BGR8:

  737.         {

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

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

  740.             YSCALE_YUV_2_RGBX_C(uint8_t)

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

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

  743.             }

  744.         }

  745.         break;

  746.     case PIX_FMT_RGB4:

  747.     case PIX_FMT_BGR4:

  748.         {

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

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

  751.             YSCALE_YUV_2_RGBX_C(uint8_t)

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

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

  754.             }

  755.         }

  756.         break;

  757.     case PIX_FMT_RGB4_BYTE:

  758.     case PIX_FMT_BGR4_BYTE:

  759.         {

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

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

  762.             YSCALE_YUV_2_RGBX_C(uint8_t)

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

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

  765.             }

  766.         }

  767.         break;

  768.     case PIX_FMT_MONOBLACK:

  769.         {

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

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

  772.             int acc=0;

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

  774.                 int j;

  775.                 int Y1=1<<18;

  776.                 int Y2=1<<18;

  777. 

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

  779.                 {

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

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

  782.                 }

  783.                 Y1>>=19;

  784.                 Y2>>=19;

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

  786.                 {

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

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

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

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

  791.                 }

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

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

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

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

  796.                     dest++;

  797.                 }

  798.             }

  799.         }

  800.         break;

  801.     case PIX_FMT_YUYV422:

  802.         YSCALE_YUV_2_PACKEDX_C(void)

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

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

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

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

  807.         }

  808.         break;

  809.     case PIX_FMT_UYVY422:

  810.         YSCALE_YUV_2_PACKEDX_C(void)

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

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

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

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

  815.         }

  816.         break;

  817.     }

  818. }

  819. 

  820. 

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

  822. //Plain C versions

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

  824. #define COMPILE_C

  825. #endif

  826. 

  827. #ifdef ARCH_POWERPC

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

  829. #define COMPILE_ALTIVEC

  830. #endif //HAVE_ALTIVEC

  831. #endif //ARCH_POWERPC

  832. 

  833. #if defined(ARCH_X86)

  834. 

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

  836. #define COMPILE_MMX

  837. #endif

  838. 

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

  840. #define COMPILE_MMX2

  841. #endif

  842. 

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

  844. #define COMPILE_3DNOW

  845. #endif

  846. #endif //ARCH_X86 || ARCH_X86_64

  847. 

  848. #undef HAVE_MMX

  849. #undef HAVE_MMX2

  850. #undef HAVE_3DNOW

  851. 

  852. #ifdef COMPILE_C

  853. #undef HAVE_MMX

  854. #undef HAVE_MMX2

  855. #undef HAVE_3DNOW

  856. #undef HAVE_ALTIVEC

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

  858. #include "swscale_template.c"

  859. #endif

  860. 

  861. #ifdef COMPILE_ALTIVEC

  862. #undef RENAME

  863. #define HAVE_ALTIVEC

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

  865. #include "swscale_template.c"

  866. #endif

  867. 

  868. #if defined(ARCH_X86)

  869. 

  870. //X86 versions

  871. /*

  872. #undef RENAME

  873. #undef HAVE_MMX

  874. #undef HAVE_MMX2

  875. #undef HAVE_3DNOW

  876. #define ARCH_X86

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

  878. #include "swscale_template.c"

  879. */

  880. //MMX versions

  881. #ifdef COMPILE_MMX

  882. #undef RENAME

  883. #define HAVE_MMX

  884. #undef HAVE_MMX2

  885. #undef HAVE_3DNOW

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

  887. #include "swscale_template.c"

  888. #endif

  889. 

  890. //MMX2 versions

  891. #ifdef COMPILE_MMX2

  892. #undef RENAME

  893. #define HAVE_MMX

  894. #define HAVE_MMX2

  895. #undef HAVE_3DNOW

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

  897. #include "swscale_template.c"

  898. #endif

  899. 

  900. //3DNOW versions

  901. #ifdef COMPILE_3DNOW

  902. #undef RENAME

  903. #define HAVE_MMX

  904. #undef HAVE_MMX2

  905. #define HAVE_3DNOW

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

  907. #include "swscale_template.c"

  908. #endif

  909. 

  910. #endif //ARCH_X86 || ARCH_X86_64

  911. 

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

  913. 

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

  915. {

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

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

  918.     else                return getSplineCoeff(        0.0,

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

  920.                                                     c + 3.0*d,

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

  922.                                             dist-1.0);

  923. }

  924. 

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

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

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

  928. {

  929.     int i;

  930.     int filterSize;

  931.     int filter2Size;

  932.     int minFilterSize;

  933.     double *filter=NULL;

  934.     double *filter2=NULL;

  935.     int ret= -1;

  936. #if defined(ARCH_X86)

  937.     if (flags & SWS_CPU_CAPS_MMX)

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

  939. #endif

  940. 

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

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

  943. 

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

  945.     {

  946.         int i;

  947.         filterSize= 1;

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

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

  950. 

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

  952.         {

  953.             filter[i*filterSize]=1;

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

  955.         }

  956. 

  957.     }

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

  959.     {

  960.         int i;

  961.         int xDstInSrc;

  962.         filterSize= 1;

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

  964. 

  965.         xDstInSrc= xInc/2 - 0x8000;

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

  967.         {

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

  969. 

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

  971.             filter[i]= 1.0;

  972.             xDstInSrc+= xInc;

  973.         }

  974.     }

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

  976.     {

  977.         int i;

  978.         int xDstInSrc;

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

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

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

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

  983. 

  984.         xDstInSrc= xInc/2 - 0x8000;

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

  986.         {

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

  988.             int j;

  989. 

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

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

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

  993.                 {

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

  995.                     double coeff= 1.0 - d;

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

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

  998.                     xx++;

  999.                 }

  1000.             xDstInSrc+= xInc;

  1001.         }

  1002.     }

  1003.     else

  1004.     {

  1005.         double xDstInSrc;

  1006.         double sizeFactor, filterSizeInSrc;

  1007.         const double xInc1= (double)xInc / (double)(1<<16);

  1008. 

  1009.         if      (flags&SWS_BICUBIC)      sizeFactor=  4.0;

  1010.         else if (flags&SWS_X)            sizeFactor=  8.0;

  1011.         else if (flags&SWS_AREA)         sizeFactor=  1.0; //downscale only, for upscale it is bilinear

  1012.         else if (flags&SWS_GAUSS)        sizeFactor=  8.0;   // infinite ;)

  1013.         else if (flags&SWS_LANCZOS)      sizeFactor= param[0] != SWS_PARAM_DEFAULT ? 2.0*param[0] : 6.0;

  1014.         else if (flags&SWS_SINC)         sizeFactor= 20.0; // infinite ;)

  1015.         else if (flags&SWS_SPLINE)       sizeFactor= 20.0;  // infinite ;)

  1016.         else if (flags&SWS_BILINEAR)     sizeFactor=  2.0;

  1017.         else {

  1018.             sizeFactor= 0.0; //GCC warning killer

  1019.             assert(0);

  1020.         }

  1021. 

  1022.         if (xInc1 <= 1.0)       filterSizeInSrc= sizeFactor; // upscale

  1023.         else                    filterSizeInSrc= sizeFactor*srcW / (double)dstW;

  1024. 

  1025.         filterSize= (int)ceil(1 + filterSizeInSrc); // will be reduced later if possible

  1026.         if (filterSize > srcW-2) filterSize=srcW-2;

  1027. 

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

  1029. 

  1030.         xDstInSrc= xInc1 / 2.0 - 0.5;

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

  1032.         {

  1033.             int xx= (int)(xDstInSrc - (filterSize-1)*0.5 + 0.5);

  1034.             int j;

  1035.             (*filterPos)[i]= xx;

  1036.             for (j=0; j<filterSize; j++)

  1037.             {

  1038.                 double d= FFABS(xx - xDstInSrc)/filterSizeInSrc*sizeFactor;

  1039.                 double coeff;

  1040.                 if (flags & SWS_BICUBIC)

  1041.                 {

  1042.                     double B= param[0] != SWS_PARAM_DEFAULT ? param[0] : 0.0;

  1043.                     double C= param[1] != SWS_PARAM_DEFAULT ? param[1] : 0.6;

  1044. 

  1045.                     if (d<1.0)

  1046.                         coeff = (12-9*B-6*C)*d*d*d + (-18+12*B+6*C)*d*d + 6-2*B;

  1047.                     else if (d<2.0)

  1048.                         coeff = (-B-6*C)*d*d*d + (6*B+30*C)*d*d + (-12*B-48*C)*d +8*B+24*C;

  1049.                     else

  1050.                         coeff=0.0;

  1051.                 }

  1052. /*                else if (flags & SWS_X)

  1053.                 {

  1054.                     double p= param ? param*0.01 : 0.3;

  1055.                     coeff = d ? sin(d*PI)/(d*PI) : 1.0;

  1056.                     coeff*= pow(2.0, - p*d*d);

  1057.                 }*/

  1058.                 else if (flags & SWS_X)

  1059.                 {

  1060.                     double A= param[0] != SWS_PARAM_DEFAULT ? param[0] : 1.0;

  1061. 

  1062.                     if (d<1.0)

  1063.                         coeff = cos(d*PI);

  1064.                     else

  1065.                         coeff=-1.0;

  1066.                     if (coeff<0.0)      coeff= -pow(-coeff, A);

  1067.                     else                coeff=  pow( coeff, A);

  1068.                     coeff= coeff*0.5 + 0.5;

  1069.                 }

  1070.                 else if (flags & SWS_AREA)

  1071.                 {

  1072.                     double srcPixelSize= 1.0/xInc1;

  1073.                     if      (d + srcPixelSize/2 < 0.5) coeff= 1.0;

  1074.                     else if (d - srcPixelSize/2 < 0.5) coeff= (0.5-d)/srcPixelSize + 0.5;

  1075.                     else coeff=0.0;

  1076.                 }

  1077.                 else if (flags & SWS_GAUSS)

  1078.                 {

  1079.                     double p= param[0] != SWS_PARAM_DEFAULT ? param[0] : 3.0;

  1080.                     coeff = pow(2.0, - p*d*d);

  1081.                 }

  1082.                 else if (flags & SWS_SINC)

  1083.                 {

  1084.                     coeff = d ? sin(d*PI)/(d*PI) : 1.0;

  1085.                 }

  1086.                 else if (flags & SWS_LANCZOS)

  1087.                 {

  1088.                     double p= param[0] != SWS_PARAM_DEFAULT ? param[0] : 3.0;

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

  1090.                     if (d>p) coeff=0;

  1091.                 }

  1092.                 else if (flags & SWS_BILINEAR)

  1093.                 {

  1094.                     coeff= 1.0 - d;

  1095.                     if (coeff<0) coeff=0;

  1096.                 }

  1097.                 else if (flags & SWS_SPLINE)

  1098.                 {

  1099.                     double p=-2.196152422706632;

  1100.                     coeff = getSplineCoeff(1.0, 0.0, p, -p-1.0, d);

  1101.                 }

  1102.                 else {

  1103.                     coeff= 0.0; //GCC warning killer

  1104.                     assert(0);

  1105.                 }

  1106. 

  1107.                 filter[i*filterSize + j]= coeff;

  1108.                 xx++;

  1109.             }

  1110.             xDstInSrc+= xInc1;

  1111.         }

  1112.     }

  1113. 

  1114.     /* apply src & dst Filter to filter -> filter2

  1115.        av_free(filter);

  1116.     */

  1117.     assert(filterSize>0);

  1118.     filter2Size= filterSize;

  1119.     if (srcFilter) filter2Size+= srcFilter->length - 1;

  1120.     if (dstFilter) filter2Size+= dstFilter->length - 1;

  1121.     assert(filter2Size>0);

  1122.     filter2= av_malloc(filter2Size*dstW*sizeof(double));

  1123. 

  1124.     for (i=0; i<dstW; i++)

  1125.     {

  1126.         int j;

  1127.         SwsVector scaleFilter;

  1128.         SwsVector *outVec;

  1129. 

  1130.         scaleFilter.coeff= filter + i*filterSize;

  1131.         scaleFilter.length= filterSize;

  1132. 

  1133.         if (srcFilter) outVec= sws_getConvVec(srcFilter, &scaleFilter);

  1134.         else           outVec= &scaleFilter;

  1135. 

  1136.         assert(outVec->length == filter2Size);

  1137.         //FIXME dstFilter

  1138. 

  1139.         for (j=0; j<outVec->length; j++)

  1140.         {

  1141.             filter2[i*filter2Size + j]= outVec->coeff[j];

  1142.         }

  1143. 

  1144.         (*filterPos)[i]+= (filterSize-1)/2 - (filter2Size-1)/2;

  1145. 

  1146.         if (outVec != &scaleFilter) sws_freeVec(outVec);

  1147.     }

  1148.     av_freep(&filter);

  1149. 

  1150.     /* try to reduce the filter-size (step1 find size and shift left) */

  1151.     // Assume it is near normalized (*0.5 or *2.0 is OK but * 0.001 is not).

  1152.     minFilterSize= 0;

  1153.     for (i=dstW-1; i>=0; i--)

  1154.     {

  1155.         int min= filter2Size;

  1156.         int j;

  1157.         double cutOff=0.0;

  1158. 

  1159.         /* get rid off near zero elements on the left by shifting left */

  1160.         for (j=0; j<filter2Size; j++)

  1161.         {

  1162.             int k;

  1163.             cutOff += FFABS(filter2[i*filter2Size]);

  1164. 

  1165.             if (cutOff > SWS_MAX_REDUCE_CUTOFF) break;

  1166. 

  1167.             /* preserve monotonicity because the core can't handle the filter otherwise */

  1168.             if (i<dstW-1 && (*filterPos)[i] >= (*filterPos)[i+1]) break;

  1169. 

  1170.             // Move filter coeffs left

  1171.             for (k=1; k<filter2Size; k++)

  1172.                 filter2[i*filter2Size + k - 1]= filter2[i*filter2Size + k];

  1173.             filter2[i*filter2Size + k - 1]= 0.0;

  1174.             (*filterPos)[i]++;

  1175.         }

  1176. 

  1177.         cutOff=0.0;

  1178.         /* count near zeros on the right */

  1179.         for (j=filter2Size-1; j>0; j--)

  1180.         {

  1181.             cutOff += FFABS(filter2[i*filter2Size + j]);

  1182. 

  1183.             if (cutOff > SWS_MAX_REDUCE_CUTOFF) break;

  1184.             min--;

  1185.         }

  1186. 

  1187.         if (min>minFilterSize) minFilterSize= min;

  1188.     }

  1189. 

  1190.     if (flags & SWS_CPU_CAPS_ALTIVEC) {

  1191.         // we can handle the special case 4,

  1192.         // so we don't want to go to the full 8

  1193.         if (minFilterSize < 5)

  1194.             filterAlign = 4;

  1195. 

  1196.         // we really don't want to waste our time

  1197.         // doing useless computation, so fall-back on

  1198.         // the scalar C code for very small filter.

  1199.         // vectorizing is worth it only if you have

  1200.         // decent-sized vector.

  1201.         if (minFilterSize < 3)

  1202.             filterAlign = 1;

  1203.     }

  1204. 

  1205.     if (flags & SWS_CPU_CAPS_MMX) {

  1206.         // special case for unscaled vertical filtering

  1207.         if (minFilterSize == 1 && filterAlign == 2)

  1208.             filterAlign= 1;

  1209.     }

  1210. 

  1211.     assert(minFilterSize > 0);

  1212.     filterSize= (minFilterSize +(filterAlign-1)) & (~(filterAlign-1));

  1213.     assert(filterSize > 0);

  1214.     filter= av_malloc(filterSize*dstW*sizeof(double));

  1215.     if (filterSize >= MAX_FILTER_SIZE || !filter)

  1216.         goto error;

  1217.     *outFilterSize= filterSize;

  1218. 

  1219.     if (flags&SWS_PRINT_INFO)

  1220.         av_log(NULL, AV_LOG_VERBOSE, "SwScaler: reducing / aligning filtersize %d -> %d\n", filter2Size, filterSize);

  1221.     /* try to reduce the filter-size (step2 reduce it) */

  1222.     for (i=0; i<dstW; i++)

  1223.     {

  1224.         int j;

  1225. 

  1226.         for (j=0; j<filterSize; j++)

  1227.         {

  1228.             if (j>=filter2Size) filter[i*filterSize + j]= 0.0;

  1229.             else               filter[i*filterSize + j]= filter2[i*filter2Size + j];

  1230.         }

  1231.     }

  1232. 

  1233. 

  1234.     //FIXME try to align filterpos if possible

  1235. 

  1236.     //fix borders

  1237.     for (i=0; i<dstW; i++)

  1238.     {

  1239.         int j;

  1240.         if ((*filterPos)[i] < 0)

  1241.         {

  1242.             // Move filter coeffs left to compensate for filterPos

  1243.             for (j=1; j<filterSize; j++)

  1244.             {

  1245.                 int left= FFMAX(j + (*filterPos)[i], 0);

  1246.                 filter[i*filterSize + left] += filter[i*filterSize + j];

  1247.                 filter[i*filterSize + j]=0;

  1248.             }

  1249.             (*filterPos)[i]= 0;

  1250.         }

  1251. 

  1252.         if ((*filterPos)[i] + filterSize > srcW)

  1253.         {

  1254.             int shift= (*filterPos)[i] + filterSize - srcW;

  1255.             // Move filter coeffs right to compensate for filterPos

  1256.             for (j=filterSize-2; j>=0; j--)

  1257.             {

  1258.                 int right= FFMIN(j + shift, filterSize-1);

  1259.                 filter[i*filterSize +right] += filter[i*filterSize +j];

  1260.                 filter[i*filterSize +j]=0;

  1261.             }

  1262.             (*filterPos)[i]= srcW - filterSize;

  1263.         }

  1264.     }

  1265. 

  1266.     // Note the +1 is for the MMXscaler which reads over the end

  1267.     /* align at 16 for AltiVec (needed by hScale_altivec_real) */

  1268.     *outFilter= av_mallocz(*outFilterSize*(dstW+1)*sizeof(int16_t));

  1269. 

  1270.     /* Normalize & Store in outFilter */

  1271.     for (i=0; i<dstW; i++)

  1272.     {

  1273.         int j;

  1274.         double error=0;

  1275.         double sum=0;

  1276.         double scale= one;

  1277. 

  1278.         for (j=0; j<filterSize; j++)

  1279.         {

  1280.             sum+= filter[i*filterSize + j];

  1281.         }

  1282.         scale/= sum;

  1283.         for (j=0; j<*outFilterSize; j++)

  1284.         {

  1285.             double v= filter[i*filterSize + j]*scale + error;

  1286.             int intV= floor(v + 0.5);

  1287.             (*outFilter)[i*(*outFilterSize) + j]= intV;

  1288.             error = v - intV;

  1289.         }

  1290.     }

  1291. 

  1292.     (*filterPos)[dstW]= (*filterPos)[dstW-1]; // the MMX scaler will read over the end

  1293.     for (i=0; i<*outFilterSize; i++)

  1294.     {

  1295.         int j= dstW*(*outFilterSize);

  1296.         (*outFilter)[j + i]= (*outFilter)[j + i - (*outFilterSize)];

  1297.     }

  1298. 

  1299.     ret=0;

  1300. error:

  1301.     av_free(filter);

  1302.     av_free(filter2);

  1303.     return ret;

  1304. }

  1305. 

  1306. #ifdef COMPILE_MMX2

  1307. static void initMMX2HScaler(int dstW, int xInc, uint8_t *funnyCode, int16_t *filter, int32_t *filterPos, int numSplits)

  1308. {

  1309.     uint8_t *fragmentA;

  1310.     long imm8OfPShufW1A;

  1311.     long imm8OfPShufW2A;

  1312.     long fragmentLengthA;

  1313.     uint8_t *fragmentB;

  1314.     long imm8OfPShufW1B;

  1315.     long imm8OfPShufW2B;

  1316.     long fragmentLengthB;

  1317.     int fragmentPos;

  1318. 

  1319.     int xpos, i;

  1320. 

  1321.     // create an optimized horizontal scaling routine

  1322. 

  1323.     //code fragment

  1324. 

  1325.     asm volatile(

  1326.         "jmp                         9f                 \n\t"

  1327.     // Begin

  1328.         "0:                                             \n\t"

  1329.         "movq    (%%"REG_d", %%"REG_a"), %%mm3          \n\t"

  1330.         "movd    (%%"REG_c", %%"REG_S"), %%mm0          \n\t"

  1331.         "movd   1(%%"REG_c", %%"REG_S"), %%mm1          \n\t"

  1332.         "punpcklbw                %%mm7, %%mm1          \n\t"

  1333.         "punpcklbw                %%mm7, %%mm0          \n\t"

  1334.         "pshufw                   $0xFF, %%mm1, %%mm1   \n\t"

  1335.         "1:                                             \n\t"

  1336.         "pshufw                   $0xFF, %%mm0, %%mm0   \n\t"

  1337.         "2:                                             \n\t"

  1338.         "psubw                    %%mm1, %%mm0          \n\t"

  1339.         "movl   8(%%"REG_b", %%"REG_a"), %%esi          \n\t"

  1340.         "pmullw                   %%mm3, %%mm0          \n\t"

  1341.         "psllw                       $7, %%mm1          \n\t"

  1342.         "paddw                    %%mm1, %%mm0          \n\t"

  1343. 

  1344.         "movq                     %%mm0, (%%"REG_D", %%"REG_a") \n\t"

  1345. 

  1346.         "add                         $8, %%"REG_a"      \n\t"

  1347.     // End

  1348.         "9:                                             \n\t"

  1349. //        "int $3                                         \n\t"

  1350.         "lea                 " LOCAL_MANGLE(0b) ", %0   \n\t"

  1351.         "lea                 " LOCAL_MANGLE(1b) ", %1   \n\t"

  1352.         "lea                 " LOCAL_MANGLE(2b) ", %2   \n\t"

  1353.         "dec                         %1                 \n\t"

  1354.         "dec                         %2                 \n\t"

  1355.         "sub                         %0, %1             \n\t"

  1356.         "sub                         %0, %2             \n\t"

  1357.         "lea                 " LOCAL_MANGLE(9b) ", %3   \n\t"

  1358.         "sub                         %0, %3             \n\t"

  1359. 

  1360. 

  1361.         :"=r" (fragmentA), "=r" (imm8OfPShufW1A), "=r" (imm8OfPShufW2A),

  1362.         "=r" (fragmentLengthA)

  1363.     );

  1364. 

  1365.     asm volatile(

  1366.         "jmp                         9f                 \n\t"

  1367.     // Begin

  1368.         "0:                                             \n\t"

  1369.         "movq    (%%"REG_d", %%"REG_a"), %%mm3          \n\t"

  1370.         "movd    (%%"REG_c", %%"REG_S"), %%mm0          \n\t"

  1371.         "punpcklbw                %%mm7, %%mm0          \n\t"

  1372.         "pshufw                   $0xFF, %%mm0, %%mm1   \n\t"

  1373.         "1:                                             \n\t"

  1374.         "pshufw                   $0xFF, %%mm0, %%mm0   \n\t"

  1375.         "2:                                             \n\t"

  1376.         "psubw                    %%mm1, %%mm0          \n\t"

  1377.         "movl   8(%%"REG_b", %%"REG_a"), %%esi          \n\t"

  1378.         "pmullw                   %%mm3, %%mm0          \n\t"

  1379.         "psllw                       $7, %%mm1          \n\t"

  1380.         "paddw                    %%mm1, %%mm0          \n\t"

  1381. 

  1382.         "movq                     %%mm0, (%%"REG_D", %%"REG_a") \n\t"

  1383. 

  1384.         "add                         $8, %%"REG_a"      \n\t"

  1385.     // End

  1386.         "9:                                             \n\t"

  1387. //        "int                       $3                   \n\t"

  1388.         "lea                 " LOCAL_MANGLE(0b) ", %0   \n\t"

  1389.         "lea                 " LOCAL_MANGLE(1b) ", %1   \n\t"

  1390.         "lea                 " LOCAL_MANGLE(2b) ", %2   \n\t"

  1391.         "dec                         %1                 \n\t"

  1392.         "dec                         %2                 \n\t"

  1393.         "sub                         %0, %1             \n\t"

  1394.         "sub                         %0, %2             \n\t"

  1395.         "lea                 " LOCAL_MANGLE(9b) ", %3   \n\t"

  1396.         "sub                         %0, %3             \n\t"

  1397. 

  1398. 

  1399.         :"=r" (fragmentB), "=r" (imm8OfPShufW1B), "=r" (imm8OfPShufW2B),

  1400.         "=r" (fragmentLengthB)

  1401.     );

  1402. 

  1403.     xpos= 0; //lumXInc/2 - 0x8000; // difference between pixel centers

  1404.     fragmentPos=0;

  1405. 

  1406.     for (i=0; i<dstW/numSplits; i++)

  1407.     {

  1408.         int xx=xpos>>16;

  1409. 

  1410.         if ((i&3) == 0)

  1411.         {

  1412.             int a=0;

  1413.             int b=((xpos+xInc)>>16) - xx;

  1414.             int c=((xpos+xInc*2)>>16) - xx;

  1415.             int d=((xpos+xInc*3)>>16) - xx;

  1416. 

  1417.             filter[i  ] = (( xpos         & 0xFFFF) ^ 0xFFFF)>>9;

  1418.             filter[i+1] = (((xpos+xInc  ) & 0xFFFF) ^ 0xFFFF)>>9;

  1419.             filter[i+2] = (((xpos+xInc*2) & 0xFFFF) ^ 0xFFFF)>>9;

  1420.             filter[i+3] = (((xpos+xInc*3) & 0xFFFF) ^ 0xFFFF)>>9;

  1421.             filterPos[i/2]= xx;

  1422. 

  1423.             if (d+1<4)

  1424.             {

  1425.                 int maxShift= 3-(d+1);

  1426.                 int shift=0;

  1427. 

  1428.                 memcpy(funnyCode + fragmentPos, fragmentB, fragmentLengthB);

  1429. 

  1430.                 funnyCode[fragmentPos + imm8OfPShufW1B]=

  1431.                     (a+1) | ((b+1)<<2) | ((c+1)<<4) | ((d+1)<<6);

  1432.                 funnyCode[fragmentPos + imm8OfPShufW2B]=

  1433.                     a | (b<<2) | (c<<4) | (d<<6);

  1434. 

  1435.                 if (i+3>=dstW) shift=maxShift; //avoid overread

  1436.                 else if ((filterPos[i/2]&3) <= maxShift) shift=filterPos[i/2]&3; //Align

  1437. 

  1438.                 if (shift && i>=shift)

  1439.                 {

  1440.                     funnyCode[fragmentPos + imm8OfPShufW1B]+= 0x55*shift;

  1441.                     funnyCode[fragmentPos + imm8OfPShufW2B]+= 0x55*shift;

  1442.                     filterPos[i/2]-=shift;

  1443.                 }

  1444. 

  1445.                 fragmentPos+= fragmentLengthB;

  1446.             }

  1447.             else

  1448.             {

  1449.                 int maxShift= 3-d;

  1450.                 int shift=0;

  1451. 

  1452.                 memcpy(funnyCode + fragmentPos, fragmentA, fragmentLengthA);

  1453. 

  1454.                 funnyCode[fragmentPos + imm8OfPShufW1A]=

  1455.                 funnyCode[fragmentPos + imm8OfPShufW2A]=

  1456.                     a | (b<<2) | (c<<4) | (d<<6);

  1457. 

  1458.                 if (i+4>=dstW) shift=maxShift; //avoid overread

  1459.                 else if ((filterPos[i/2]&3) <= maxShift) shift=filterPos[i/2]&3; //partial align

  1460. 

  1461.                 if (shift && i>=shift)

  1462.                 {

  1463.                     funnyCode[fragmentPos + imm8OfPShufW1A]+= 0x55*shift;

  1464.                     funnyCode[fragmentPos + imm8OfPShufW2A]+= 0x55*shift;

  1465.                     filterPos[i/2]-=shift;

  1466.                 }

  1467. 

  1468.                 fragmentPos+= fragmentLengthA;

  1469.             }

  1470. 

  1471.             funnyCode[fragmentPos]= RET;

  1472.         }

  1473.         xpos+=xInc;

  1474.     }

  1475.     filterPos[i/2]= xpos>>16; // needed to jump to the next part

  1476. }

  1477. #endif /* COMPILE_MMX2 */

  1478. 

  1479. static void globalInit(void){

  1480.     // generating tables:

  1481.     int i;

  1482.     for (i=0; i<768; i++){

  1483.         int c= av_clip_uint8(i-256);

  1484.         clip_table[i]=c;

  1485.     }

  1486. }

  1487. 

  1488. static SwsFunc getSwsFunc(int flags){

  1489. 

  1490. #if defined(RUNTIME_CPUDETECT) && defined (CONFIG_GPL)

  1491. #if defined(ARCH_X86)

  1492.     // ordered per speed fastest first

  1493.     if (flags & SWS_CPU_CAPS_MMX2)

  1494.         return swScale_MMX2;

  1495.     else if (flags & SWS_CPU_CAPS_3DNOW)

  1496.         return swScale_3DNow;

  1497.     else if (flags & SWS_CPU_CAPS_MMX)

  1498.         return swScale_MMX;

  1499.     else

  1500.         return swScale_C;

  1501. 

  1502. #else

  1503. #ifdef ARCH_POWERPC

  1504.     if (flags & SWS_CPU_CAPS_ALTIVEC)

  1505.         return swScale_altivec;

  1506.     else

  1507.         return swScale_C;

  1508. #endif

  1509.     return swScale_C;

  1510. #endif /* defined(ARCH_X86) */

  1511. #else //RUNTIME_CPUDETECT

  1512. #ifdef HAVE_MMX2

  1513.     return swScale_MMX2;

  1514. #elif defined (HAVE_3DNOW)

  1515.     return swScale_3DNow;

  1516. #elif defined (HAVE_MMX)

  1517.     return swScale_MMX;

  1518. #elif defined (HAVE_ALTIVEC)

  1519.     return swScale_altivec;

  1520. #else

  1521.     return swScale_C;

  1522. #endif

  1523. #endif //!RUNTIME_CPUDETECT

  1524. }

  1525. 

  1526. static int PlanarToNV12Wrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1527.                                int srcSliceH, uint8_t* dstParam[], int dstStride[]){

  1528.     uint8_t *dst=dstParam[0] + dstStride[0]*srcSliceY;

  1529.     /* Copy Y plane */

  1530.     if (dstStride[0]==srcStride[0] && srcStride[0] > 0)

  1531.         memcpy(dst, src[0], srcSliceH*dstStride[0]);

  1532.     else

  1533.     {

  1534.         int i;

  1535.         uint8_t *srcPtr= src[0];

  1536.         uint8_t *dstPtr= dst;

  1537.         for (i=0; i<srcSliceH; i++)

  1538.         {

  1539.             memcpy(dstPtr, srcPtr, c->srcW);

  1540.             srcPtr+= srcStride[0];

  1541.             dstPtr+= dstStride[0];

  1542.         }

  1543.     }

  1544.     dst = dstParam[1] + dstStride[1]*srcSliceY/2;

  1545.     if (c->dstFormat == PIX_FMT_NV12)

  1546.         interleaveBytes(src[1], src[2], dst, c->srcW/2, srcSliceH/2, srcStride[1], srcStride[2], dstStride[0]);

  1547.     else

  1548.         interleaveBytes(src[2], src[1], dst, c->srcW/2, srcSliceH/2, srcStride[2], srcStride[1], dstStride[0]);

  1549. 

  1550.     return srcSliceH;

  1551. }

  1552. 

  1553. static int PlanarToYuy2Wrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1554.                                int srcSliceH, uint8_t* dstParam[], int dstStride[]){

  1555.     uint8_t *dst=dstParam[0] + dstStride[0]*srcSliceY;

  1556. 

  1557.     yv12toyuy2(src[0], src[1], src[2], dst, c->srcW, srcSliceH, srcStride[0], srcStride[1], dstStride[0]);

  1558. 

  1559.     return srcSliceH;

  1560. }

  1561. 

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

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

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

  1565. 

  1566.     yv12touyvy(src[0], src[1], src[2], dst, c->srcW, srcSliceH, srcStride[0], srcStride[1], dstStride[0]);

  1567. 

  1568.     return srcSliceH;

  1569. }

  1570. 

  1571. /* {RGB,BGR}{15,16,24,32} -> {RGB,BGR}{15,16,24,32} */

  1572. static int rgb2rgbWrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1573.                           int srcSliceH, uint8_t* dst[], int dstStride[]){

  1574.     const int srcFormat= c->srcFormat;

  1575.     const int dstFormat= c->dstFormat;

  1576.     const int srcBpp= (fmt_depth(srcFormat) + 7) >> 3;

  1577.     const int dstBpp= (fmt_depth(dstFormat) + 7) >> 3;

  1578.     const int srcId= fmt_depth(srcFormat) >> 2; /* 1:0, 4:1, 8:2, 15:3, 16:4, 24:6, 32:8 */

  1579.     const int dstId= fmt_depth(dstFormat) >> 2;

  1580.     void (*conv)(const uint8_t *src, uint8_t *dst, long src_size)=NULL;

  1581. 

  1582.     /* BGR -> BGR */

  1583.     if (  (isBGR(srcFormat) && isBGR(dstFormat))

  1584.        || (isRGB(srcFormat) && isRGB(dstFormat))){

  1585.         switch(srcId | (dstId<<4)){

  1586.         case 0x34: conv= rgb16to15; break;

  1587.         case 0x36: conv= rgb24to15; break;

  1588.         case 0x38: conv= rgb32to15; break;

  1589.         case 0x43: conv= rgb15to16; break;

  1590.         case 0x46: conv= rgb24to16; break;

  1591.         case 0x48: conv= rgb32to16; break;

  1592.         case 0x63: conv= rgb15to24; break;

  1593.         case 0x64: conv= rgb16to24; break;

  1594.         case 0x68: conv= rgb32to24; break;

  1595.         case 0x83: conv= rgb15to32; break;

  1596.         case 0x84: conv= rgb16to32; break;

  1597.         case 0x86: conv= rgb24to32; break;

  1598.         default: av_log(c, AV_LOG_ERROR, "internal error %s -> %s converter\n",

  1599.                         sws_format_name(srcFormat), sws_format_name(dstFormat)); break;

  1600.         }

  1601.     }else if (  (isBGR(srcFormat) && isRGB(dstFormat))

  1602.              || (isRGB(srcFormat) && isBGR(dstFormat))){

  1603.         switch(srcId | (dstId<<4)){

  1604.         case 0x33: conv= rgb15tobgr15; break;

  1605.         case 0x34: conv= rgb16tobgr15; break;

  1606.         case 0x36: conv= rgb24tobgr15; break;

  1607.         case 0x38: conv= rgb32tobgr15; break;

  1608.         case 0x43: conv= rgb15tobgr16; break;

  1609.         case 0x44: conv= rgb16tobgr16; break;

  1610.         case 0x46: conv= rgb24tobgr16; break;

  1611.         case 0x48: conv= rgb32tobgr16; break;

  1612.         case 0x63: conv= rgb15tobgr24; break;

  1613.         case 0x64: conv= rgb16tobgr24; break;

  1614.         case 0x66: conv= rgb24tobgr24; break;

  1615.         case 0x68: conv= rgb32tobgr24; break;

  1616.         case 0x83: conv= rgb15tobgr32; break;

  1617.         case 0x84: conv= rgb16tobgr32; break;

  1618.         case 0x86: conv= rgb24tobgr32; break;

  1619.         case 0x88: conv= rgb32tobgr32; break;

  1620.         default: av_log(c, AV_LOG_ERROR, "internal error %s -> %s converter\n",

  1621.                         sws_format_name(srcFormat), sws_format_name(dstFormat)); break;

  1622.         }

  1623.     }else{

  1624.         av_log(c, AV_LOG_ERROR, "internal error %s -> %s converter\n",

  1625.                sws_format_name(srcFormat), sws_format_name(dstFormat));

  1626.     }

  1627. 

  1628.     if(conv)

  1629.     {

  1630.         if (dstStride[0]*srcBpp == srcStride[0]*dstBpp && srcStride[0] > 0)

  1631.             conv(src[0], dst[0] + dstStride[0]*srcSliceY, srcSliceH*srcStride[0]);

  1632.         else

  1633.         {

  1634.             int i;

  1635.             uint8_t *srcPtr= src[0];

  1636.             uint8_t *dstPtr= dst[0] + dstStride[0]*srcSliceY;

  1637. 

  1638.             for (i=0; i<srcSliceH; i++)

  1639.             {

  1640.                 conv(srcPtr, dstPtr, c->srcW*srcBpp);

  1641.                 srcPtr+= srcStride[0];

  1642.                 dstPtr+= dstStride[0];

  1643.             }

  1644.         }

  1645.     }

  1646.     return srcSliceH;

  1647. }

  1648. 

  1649. static int bgr24toyv12Wrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1650.                               int srcSliceH, uint8_t* dst[], int dstStride[]){

  1651. 

  1652.     rgb24toyv12(

  1653.         src[0],

  1654.         dst[0]+ srcSliceY    *dstStride[0],

  1655.         dst[1]+(srcSliceY>>1)*dstStride[1],

  1656.         dst[2]+(srcSliceY>>1)*dstStride[2],

  1657.         c->srcW, srcSliceH,

  1658.         dstStride[0], dstStride[1], srcStride[0]);

  1659.     return srcSliceH;

  1660. }

  1661. 

  1662. static int yvu9toyv12Wrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1663.                              int srcSliceH, uint8_t* dst[], int dstStride[]){

  1664.     int i;

  1665. 

  1666.     /* copy Y */

  1667.     if (srcStride[0]==dstStride[0] && srcStride[0] > 0)

  1668.         memcpy(dst[0]+ srcSliceY*dstStride[0], src[0], srcStride[0]*srcSliceH);

  1669.     else{

  1670.         uint8_t *srcPtr= src[0];

  1671.         uint8_t *dstPtr= dst[0] + dstStride[0]*srcSliceY;

  1672. 

  1673.         for (i=0; i<srcSliceH; i++)

  1674.         {

  1675.             memcpy(dstPtr, srcPtr, c->srcW);

  1676.             srcPtr+= srcStride[0];

  1677.             dstPtr+= dstStride[0];

  1678.         }

  1679.     }

  1680. 

  1681.     if (c->dstFormat==PIX_FMT_YUV420P){

  1682.         planar2x(src[1], dst[1], c->chrSrcW, c->chrSrcH, srcStride[1], dstStride[1]);

  1683.         planar2x(src[2], dst[2], c->chrSrcW, c->chrSrcH, srcStride[2], dstStride[2]);

  1684.     }else{

  1685.         planar2x(src[1], dst[2], c->chrSrcW, c->chrSrcH, srcStride[1], dstStride[2]);

  1686.         planar2x(src[2], dst[1], c->chrSrcW, c->chrSrcH, srcStride[2], dstStride[1]);

  1687.     }

  1688.     return srcSliceH;

  1689. }

  1690. 

  1691. /* unscaled copy like stuff (assumes nearly identical formats) */

  1692. static int packedCopy(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1693.                       int srcSliceH, uint8_t* dst[], int dstStride[])

  1694. {

  1695.     if (dstStride[0]==srcStride[0] && srcStride[0] > 0)

  1696.         memcpy(dst[0] + dstStride[0]*srcSliceY, src[0], srcSliceH*dstStride[0]);

  1697.     else

  1698.     {

  1699.         int i;

  1700.         uint8_t *srcPtr= src[0];

  1701.         uint8_t *dstPtr= dst[0] + dstStride[0]*srcSliceY;

  1702.         int length=0;

  1703. 

  1704.         /* universal length finder */

  1705.         while(length+c->srcW <= FFABS(dstStride[0])

  1706.            && length+c->srcW <= FFABS(srcStride[0])) length+= c->srcW;

  1707.         assert(length!=0);

  1708. 

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

  1710.         {

  1711.             memcpy(dstPtr, srcPtr, length);

  1712.             srcPtr+= srcStride[0];

  1713.             dstPtr+= dstStride[0];

  1714.         }

  1715.     }

  1716.     return srcSliceH;

  1717. }

  1718. 

  1719. static int planarCopy(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1720.                       int srcSliceH, uint8_t* dst[], int dstStride[])

  1721. {

  1722.     int plane;

  1723.     for (plane=0; plane<3; plane++)

  1724.     {

  1725.         int length= plane==0 ? c->srcW  : -((-c->srcW  )>>c->chrDstHSubSample);

  1726.         int y=      plane==0 ? srcSliceY: -((-srcSliceY)>>c->chrDstVSubSample);

  1727.         int height= plane==0 ? srcSliceH: -((-srcSliceH)>>c->chrDstVSubSample);

  1728. 

  1729.         if ((isGray(c->srcFormat) || isGray(c->dstFormat)) && plane>0)

  1730.         {

  1731.             if (!isGray(c->dstFormat))

  1732.                 memset(dst[plane], 128, dstStride[plane]*height);

  1733.         }

  1734.         else

  1735.         {

  1736.             if (dstStride[plane]==srcStride[plane] && srcStride[plane] > 0)

  1737.                 memcpy(dst[plane] + dstStride[plane]*y, src[plane], height*dstStride[plane]);

  1738.             else

  1739.             {

  1740.                 int i;

  1741.                 uint8_t *srcPtr= src[plane];

  1742.                 uint8_t *dstPtr= dst[plane] + dstStride[plane]*y;

  1743.                 for (i=0; i<height; i++)

  1744.                 {

  1745.                     memcpy(dstPtr, srcPtr, length);

  1746.                     srcPtr+= srcStride[plane];

  1747.                     dstPtr+= dstStride[plane];

  1748.                 }

  1749.             }

  1750.         }

  1751.     }

  1752.     return srcSliceH;

  1753. }

  1754. 

  1755. static int gray16togray(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

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

  1757. 

  1758.     int length= c->srcW;

  1759.     int y=      srcSliceY;

  1760.     int height= srcSliceH;

  1761.     int i, j;

  1762.     uint8_t *srcPtr= src[0];

  1763.     uint8_t *dstPtr= dst[0] + dstStride[0]*y;

  1764. 

  1765.     if (!isGray(c->dstFormat)){

  1766.         int height= -((-srcSliceH)>>c->chrDstVSubSample);

  1767.         memset(dst[1], 128, dstStride[1]*height);

  1768.         memset(dst[2], 128, dstStride[2]*height);

  1769.     }

  1770.     if (c->srcFormat == PIX_FMT_GRAY16LE) srcPtr++;

  1771.     for (i=0; i<height; i++)

  1772.     {

  1773.         for (j=0; j<length; j++) dstPtr[j] = srcPtr[j<<1];

  1774.         srcPtr+= srcStride[0];

  1775.         dstPtr+= dstStride[0];

  1776.     }

  1777.     return srcSliceH;

  1778. }

  1779. 

  1780. static int graytogray16(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1781.                         int srcSliceH, uint8_t* dst[], int dstStride[]){

  1782. 

  1783.     int length= c->srcW;

  1784.     int y=      srcSliceY;

  1785.     int height= srcSliceH;

  1786.     int i, j;

  1787.     uint8_t *srcPtr= src[0];

  1788.     uint8_t *dstPtr= dst[0] + dstStride[0]*y;

  1789.     for (i=0; i<height; i++)

  1790.     {

  1791.         for (j=0; j<length; j++)

  1792.         {

  1793.             dstPtr[j<<1] = srcPtr[j];

  1794.             dstPtr[(j<<1)+1] = srcPtr[j];

  1795.         }

  1796.         srcPtr+= srcStride[0];

  1797.         dstPtr+= dstStride[0];

  1798.     }

  1799.     return srcSliceH;

  1800. }

  1801. 

  1802. static int gray16swap(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1803.                       int srcSliceH, uint8_t* dst[], int dstStride[]){

  1804. 

  1805.     int length= c->srcW;

  1806.     int y=      srcSliceY;

  1807.     int height= srcSliceH;

  1808.     int i, j;

  1809.     uint16_t *srcPtr= (uint16_t*)src[0];

  1810.     uint16_t *dstPtr= (uint16_t*)(dst[0] + dstStride[0]*y/2);

  1811.     for (i=0; i<height; i++)

  1812.     {

  1813.         for (j=0; j<length; j++) dstPtr[j] = bswap_16(srcPtr[j]);

  1814.         srcPtr+= srcStride[0]/2;

  1815.         dstPtr+= dstStride[0]/2;

  1816.     }

  1817.     return srcSliceH;

  1818. }

  1819. 

  1820. 

  1821. static void getSubSampleFactors(int *h, int *v, int format){

  1822.     switch(format){

  1823.     case PIX_FMT_UYVY422:

  1824.     case PIX_FMT_YUYV422:

  1825.         *h=1;

  1826.         *v=0;

  1827.         break;

  1828.     case PIX_FMT_YUV420P:

  1829.     case PIX_FMT_YUVA420P:

  1830.     case PIX_FMT_GRAY16BE:

  1831.     case PIX_FMT_GRAY16LE:

  1832.     case PIX_FMT_GRAY8: //FIXME remove after different subsamplings are fully implemented

  1833.     case PIX_FMT_NV12:

  1834.     case PIX_FMT_NV21:

  1835.         *h=1;

  1836.         *v=1;

  1837.         break;

  1838.     case PIX_FMT_YUV440P:

  1839.         *h=0;

  1840.         *v=1;

  1841.         break;

  1842.     case PIX_FMT_YUV410P:

  1843.         *h=2;

  1844.         *v=2;

  1845.         break;

  1846.     case PIX_FMT_YUV444P:

  1847.         *h=0;

  1848.         *v=0;

  1849.         break;

  1850.     case PIX_FMT_YUV422P:

  1851.         *h=1;

  1852.         *v=0;

  1853.         break;

  1854.     case PIX_FMT_YUV411P:

  1855.         *h=2;

  1856.         *v=0;

  1857.         break;

  1858.     default:

  1859.         *h=0;

  1860.         *v=0;

  1861.         break;

  1862.     }

  1863. }

  1864. 

  1865. static uint16_t roundToInt16(int64_t f){

  1866.     int r= (f + (1<<15))>>16;

  1867.          if (r<-0x7FFF) return 0x8000;

  1868.     else if (r> 0x7FFF) return 0x7FFF;

  1869.     else                return r;

  1870. }

  1871. 

  1872. /**

  1873.  * @param inv_table the yuv2rgb coeffs, normally Inverse_Table_6_9[x]

  1874.  * @param fullRange if 1 then the luma range is 0..255 if 0 it is 16..235

  1875.  * @return -1 if not supported

  1876.  */

  1877. int sws_setColorspaceDetails(SwsContext *c, const int inv_table[4], int srcRange, const int table[4], int dstRange, int brightness, int contrast, int saturation){

  1878.     int64_t crv =  inv_table[0];

  1879.     int64_t cbu =  inv_table[1];

  1880.     int64_t cgu = -inv_table[2];

  1881.     int64_t cgv = -inv_table[3];

  1882.     int64_t cy  = 1<<16;

  1883.     int64_t oy  = 0;

  1884. 

  1885.     if (isYUV(c->dstFormat) || isGray(c->dstFormat)) return -1;

  1886.     memcpy(c->srcColorspaceTable, inv_table, sizeof(int)*4);

  1887.     memcpy(c->dstColorspaceTable,     table, sizeof(int)*4);

  1888. 

  1889.     c->brightness= brightness;

  1890.     c->contrast  = contrast;

  1891.     c->saturation= saturation;

  1892.     c->srcRange  = srcRange;

  1893.     c->dstRange  = dstRange;

  1894. 

  1895.     c->uOffset=   0x0400040004000400LL;

  1896.     c->vOffset=   0x0400040004000400LL;

  1897. 

  1898.     if (!srcRange){

  1899.         cy= (cy*255) / 219;

  1900.         oy= 16<<16;

  1901.     }else{

  1902.         crv= (crv*224) / 255;

  1903.         cbu= (cbu*224) / 255;

  1904.         cgu= (cgu*224) / 255;

  1905.         cgv= (cgv*224) / 255;

  1906.     }

  1907. 

  1908.     cy = (cy *contrast             )>>16;

  1909.     crv= (crv*contrast * saturation)>>32;

  1910.     cbu= (cbu*contrast * saturation)>>32;

  1911.     cgu= (cgu*contrast * saturation)>>32;

  1912.     cgv= (cgv*contrast * saturation)>>32;

  1913. 

  1914.     oy -= 256*brightness;

  1915. 

  1916.     c->yCoeff=    roundToInt16(cy *8192) * 0x0001000100010001ULL;

  1917.     c->vrCoeff=   roundToInt16(crv*8192) * 0x0001000100010001ULL;

  1918.     c->ubCoeff=   roundToInt16(cbu*8192) * 0x0001000100010001ULL;

  1919.     c->vgCoeff=   roundToInt16(cgv*8192) * 0x0001000100010001ULL;

  1920.     c->ugCoeff=   roundToInt16(cgu*8192) * 0x0001000100010001ULL;

  1921.     c->yOffset=   roundToInt16(oy *   8) * 0x0001000100010001ULL;

  1922. 

  1923.     yuv2rgb_c_init_tables(c, inv_table, srcRange, brightness, contrast, saturation);

  1924.     //FIXME factorize

  1925. 

  1926. #ifdef COMPILE_ALTIVEC

  1927.     if (c->flags & SWS_CPU_CAPS_ALTIVEC)

  1928.         yuv2rgb_altivec_init_tables (c, inv_table, brightness, contrast, saturation);

  1929. #endif

  1930.     return 0;

  1931. }

  1932. 

  1933. /**

  1934.  * @return -1 if not supported

  1935.  */

  1936. int sws_getColorspaceDetails(SwsContext *c, int **inv_table, int *srcRange, int **table, int *dstRange, int *brightness, int *contrast, int *saturation){

  1937.     if (isYUV(c->dstFormat) || isGray(c->dstFormat)) return -1;

  1938. 

  1939.     *inv_table = c->srcColorspaceTable;

  1940.     *table     = c->dstColorspaceTable;

  1941.     *srcRange  = c->srcRange;

  1942.     *dstRange  = c->dstRange;

  1943.     *brightness= c->brightness;

  1944.     *contrast  = c->contrast;

  1945.     *saturation= c->saturation;

  1946. 

  1947.     return 0;

  1948. }

  1949. 

  1950. static int handle_jpeg(int *format)

  1951. {

  1952.     switch (*format) {

  1953.         case PIX_FMT_YUVJ420P:

  1954.             *format = PIX_FMT_YUV420P;

  1955.             return 1;

  1956.         case PIX_FMT_YUVJ422P:

  1957.             *format = PIX_FMT_YUV422P;

  1958.             return 1;

  1959.         case PIX_FMT_YUVJ444P:

  1960.             *format = PIX_FMT_YUV444P;

  1961.             return 1;

  1962.         case PIX_FMT_YUVJ440P:

  1963.             *format = PIX_FMT_YUV440P;

  1964.             return 1;

  1965.         default:

  1966.             return 0;

  1967.     }

  1968. }

  1969. 

  1970. SwsContext *sws_getContext(int srcW, int srcH, int srcFormat, int dstW, int dstH, int dstFormat, int flags,

  1971.                            SwsFilter *srcFilter, SwsFilter *dstFilter, double *param){

  1972. 

  1973.     SwsContext *c;

  1974.     int i;

  1975.     int usesVFilter, usesHFilter;

  1976.     int unscaled, needsDither;

  1977.     int srcRange, dstRange;

  1978.     SwsFilter dummyFilter= {NULL, NULL, NULL, NULL};

  1979. #if defined(ARCH_X86)

  1980.     if (flags & SWS_CPU_CAPS_MMX)

  1981.         asm volatile("emms\n\t"::: "memory");

  1982. #endif

  1983. 

  1984. #if !defined(RUNTIME_CPUDETECT) || !defined (CONFIG_GPL) //ensure that the flags match the compiled variant if cpudetect is off

  1985.     flags &= ~(SWS_CPU_CAPS_MMX|SWS_CPU_CAPS_MMX2|SWS_CPU_CAPS_3DNOW|SWS_CPU_CAPS_ALTIVEC|SWS_CPU_CAPS_BFIN);

  1986. #ifdef HAVE_MMX2

  1987.     flags |= SWS_CPU_CAPS_MMX|SWS_CPU_CAPS_MMX2;

  1988. #elif defined (HAVE_3DNOW)

  1989.     flags |= SWS_CPU_CAPS_MMX|SWS_CPU_CAPS_3DNOW;

  1990. #elif defined (HAVE_MMX)

  1991.     flags |= SWS_CPU_CAPS_MMX;

  1992. #elif defined (HAVE_ALTIVEC)

  1993.     flags |= SWS_CPU_CAPS_ALTIVEC;

  1994. #elif defined (ARCH_BFIN)

  1995.     flags |= SWS_CPU_CAPS_BFIN;

  1996. #endif

  1997. #endif /* RUNTIME_CPUDETECT */

  1998.     if (clip_table[512] != 255) globalInit();

  1999.     if (!rgb15to16) sws_rgb2rgb_init(flags);

  2000. 

  2001.     unscaled = (srcW == dstW && srcH == dstH);

  2002.     needsDither= (isBGR(dstFormat) || isRGB(dstFormat))

  2003.         && (fmt_depth(dstFormat))<24

  2004.         && ((fmt_depth(dstFormat))<(fmt_depth(srcFormat)) || (!(isRGB(srcFormat) || isBGR(srcFormat))));

  2005. 

  2006.     srcRange = handle_jpeg(&srcFormat);

  2007.     dstRange = handle_jpeg(&dstFormat);

  2008. 

  2009.     if (!isSupportedIn(srcFormat))

  2010.     {

  2011.         av_log(NULL, AV_LOG_ERROR, "swScaler: %s is not supported as input pixel format\n", sws_format_name(srcFormat));

  2012.         return NULL;

  2013.     }

  2014.     if (!isSupportedOut(dstFormat))

  2015.     {

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

  2017.         return NULL;

  2018.     }

  2019. 

  2020.     i= flags & ( SWS_POINT

  2021.                 |SWS_AREA

  2022.                 |SWS_BILINEAR

  2023.                 |SWS_FAST_BILINEAR

  2024.                 |SWS_BICUBIC

  2025.                 |SWS_X

  2026.                 |SWS_GAUSS

  2027.                 |SWS_LANCZOS

  2028.                 |SWS_SINC

  2029.                 |SWS_SPLINE

  2030.                 |SWS_BICUBLIN);

  2031.     if(!i || (i & (i-1)))

  2032.     {

  2033.         av_log(NULL, AV_LOG_ERROR, "swScaler: Exactly one scaler algorithm must be choosen\n");

  2034.         return NULL;

  2035.     }

  2036. 

  2037. 

  2038.     /* sanity check */

  2039.     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

  2040.     {

  2041.         av_log(NULL, AV_LOG_ERROR, "swScaler: %dx%d -> %dx%d is invalid scaling dimension\n",

  2042.                srcW, srcH, dstW, dstH);

  2043.         return NULL;

  2044.     }

  2045.     if(srcW > VOFW || dstW > VOFW){

  2046.         av_log(NULL, AV_LOG_ERROR, "swScaler: Compile time max width is "AV_STRINGIFY(VOFW)" change VOF/VOFW and recompile\n");

  2047.         return NULL;

  2048.     }

  2049. 

  2050.     if (!dstFilter) dstFilter= &dummyFilter;

  2051.     if (!srcFilter) srcFilter= &dummyFilter;

  2052. 

  2053.     c= av_mallocz(sizeof(SwsContext));

  2054. 

  2055.     c->av_class = &sws_context_class;

  2056.     c->srcW= srcW;

  2057.     c->srcH= srcH;

  2058.     c->dstW= dstW;

  2059.     c->dstH= dstH;

  2060.     c->lumXInc= ((srcW<<16) + (dstW>>1))/dstW;

  2061.     c->lumYInc= ((srcH<<16) + (dstH>>1))/dstH;

  2062.     c->flags= flags;

  2063.     c->dstFormat= dstFormat;

  2064.     c->srcFormat= srcFormat;

  2065.     c->vRounder= 4* 0x0001000100010001ULL;

  2066. 

  2067.     usesHFilter= usesVFilter= 0;

  2068.     if (dstFilter->lumV && dstFilter->lumV->length>1) usesVFilter=1;

  2069.     if (dstFilter->lumH && dstFilter->lumH->length>1) usesHFilter=1;

  2070.     if (dstFilter->chrV && dstFilter->chrV->length>1) usesVFilter=1;

  2071.     if (dstFilter->chrH && dstFilter->chrH->length>1) usesHFilter=1;

  2072.     if (srcFilter->lumV && srcFilter->lumV->length>1) usesVFilter=1;

  2073.     if (srcFilter->lumH && srcFilter->lumH->length>1) usesHFilter=1;

  2074.     if (srcFilter->chrV && srcFilter->chrV->length>1) usesVFilter=1;

  2075.     if (srcFilter->chrH && srcFilter->chrH->length>1) usesHFilter=1;

  2076. 

  2077.     getSubSampleFactors(&c->chrSrcHSubSample, &c->chrSrcVSubSample, srcFormat);

  2078.     getSubSampleFactors(&c->chrDstHSubSample, &c->chrDstVSubSample, dstFormat);

  2079. 

  2080.     // reuse chroma for 2 pixles rgb/bgr unless user wants full chroma interpolation

  2081.     if ((isBGR(dstFormat) || isRGB(dstFormat)) && !(flags&SWS_FULL_CHR_H_INT)) c->chrDstHSubSample=1;

  2082. 

  2083.     // drop some chroma lines if the user wants it

  2084.     c->vChrDrop= (flags&SWS_SRC_V_CHR_DROP_MASK)>>SWS_SRC_V_CHR_DROP_SHIFT;

  2085.     c->chrSrcVSubSample+= c->vChrDrop;

  2086. 

  2087.     // drop every 2. pixel for chroma calculation unless user wants full chroma

  2088.     if ((isBGR(srcFormat) || isRGB(srcFormat)) && !(flags&SWS_FULL_CHR_H_INP)

  2089.       && srcFormat!=PIX_FMT_RGB8      && srcFormat!=PIX_FMT_BGR8

  2090.       && srcFormat!=PIX_FMT_RGB4      && srcFormat!=PIX_FMT_BGR4

  2091.       && srcFormat!=PIX_FMT_RGB4_BYTE && srcFormat!=PIX_FMT_BGR4_BYTE)

  2092.         c->chrSrcHSubSample=1;

  2093. 

  2094.     if (param){

  2095.         c->param[0] = param[0];

  2096.         c->param[1] = param[1];

  2097.     }else{

  2098.         c->param[0] =

  2099.         c->param[1] = SWS_PARAM_DEFAULT;

  2100.     }

  2101. 

  2102.     c->chrIntHSubSample= c->chrDstHSubSample;

  2103.     c->chrIntVSubSample= c->chrSrcVSubSample;

  2104. 

  2105.     // Note the -((-x)>>y) is so that we always round toward +inf.

  2106.     c->chrSrcW= -((-srcW) >> c->chrSrcHSubSample);

  2107.     c->chrSrcH= -((-srcH) >> c->chrSrcVSubSample);

  2108.     c->chrDstW= -((-dstW) >> c->chrDstHSubSample);

  2109.     c->chrDstH= -((-dstH) >> c->chrDstVSubSample);

  2110. 

  2111.     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);

  2112. 

  2113.     /* unscaled special Cases */

  2114.     if (unscaled && !usesHFilter && !usesVFilter)

  2115.     {

  2116.         /* yv12_to_nv12 */

  2117.         if (srcFormat == PIX_FMT_YUV420P && (dstFormat == PIX_FMT_NV12 || dstFormat == PIX_FMT_NV21))

  2118.         {

  2119.             c->swScale= PlanarToNV12Wrapper;

  2120.         }

  2121. #ifdef CONFIG_GPL

  2122.         /* yuv2bgr */

  2123.         if ((srcFormat==PIX_FMT_YUV420P || srcFormat==PIX_FMT_YUV422P) && (isBGR(dstFormat) || isRGB(dstFormat)))

  2124.         {

  2125.             c->swScale= yuv2rgb_get_func_ptr(c);

  2126.         }

  2127. #endif

  2128. 

  2129.         if (srcFormat==PIX_FMT_YUV410P && dstFormat==PIX_FMT_YUV420P)

  2130.         {

  2131.             c->swScale= yvu9toyv12Wrapper;

  2132.         }

  2133. 

  2134.         /* bgr24toYV12 */

  2135.         if (srcFormat==PIX_FMT_BGR24 && dstFormat==PIX_FMT_YUV420P)

  2136.             c->swScale= bgr24toyv12Wrapper;

  2137. 

  2138.         /* rgb/bgr -> rgb/bgr (no dither needed forms) */

  2139.         if (  (isBGR(srcFormat) || isRGB(srcFormat))

  2140.            && (isBGR(dstFormat) || isRGB(dstFormat))

  2141.            && srcFormat != PIX_FMT_BGR8      && dstFormat != PIX_FMT_BGR8

  2142.            && srcFormat != PIX_FMT_RGB8      && dstFormat != PIX_FMT_RGB8

  2143.            && srcFormat != PIX_FMT_BGR4      && dstFormat != PIX_FMT_BGR4

  2144.            && srcFormat != PIX_FMT_RGB4      && dstFormat != PIX_FMT_RGB4

  2145.            && srcFormat != PIX_FMT_BGR4_BYTE && dstFormat != PIX_FMT_BGR4_BYTE

  2146.            && srcFormat != PIX_FMT_RGB4_BYTE && dstFormat != PIX_FMT_RGB4_BYTE

  2147.            && srcFormat != PIX_FMT_MONOBLACK && dstFormat != PIX_FMT_MONOBLACK

  2148.            && !needsDither)

  2149.              c->swScale= rgb2rgbWrapper;

  2150. 

  2151.         /* LQ converters if -sws 0 or -sws 4*/

  2152.         if (c->flags&(SWS_FAST_BILINEAR|SWS_POINT)){

  2153.             /* rgb/bgr -> rgb/bgr (dither needed forms) */

  2154.             if ( (isBGR(srcFormat) || isRGB(srcFormat))

  2155.               && (isBGR(dstFormat) || isRGB(dstFormat))

  2156.               && needsDither)

  2157.                 c->swScale= rgb2rgbWrapper;

  2158. 

  2159.             /* yv12_to_yuy2 */

  2160.             if (srcFormat == PIX_FMT_YUV420P &&

  2161.                 (dstFormat == PIX_FMT_YUYV422 || dstFormat == PIX_FMT_UYVY422))

  2162.             {

  2163.                 if (dstFormat == PIX_FMT_YUYV422)

  2164.                     c->swScale= PlanarToYuy2Wrapper;

  2165.                 else

  2166.                     c->swScale= PlanarToUyvyWrapper;

  2167.             }

  2168.         }

  2169. 

  2170. #ifdef COMPILE_ALTIVEC

  2171.         if ((c->flags & SWS_CPU_CAPS_ALTIVEC) &&

  2172.             ((srcFormat == PIX_FMT_YUV420P &&

  2173.              (dstFormat == PIX_FMT_YUYV422 || dstFormat == PIX_FMT_UYVY422)))) {

  2174.           // unscaled YV12 -> packed YUV, we want speed

  2175.           if (dstFormat == PIX_FMT_YUYV422)

  2176.               c->swScale= yv12toyuy2_unscaled_altivec;

  2177.           else

  2178.               c->swScale= yv12touyvy_unscaled_altivec;

  2179.         }

  2180. #endif

  2181. 

  2182.         /* simple copy */

  2183.         if (  srcFormat == dstFormat

  2184.             || (isPlanarYUV(srcFormat) && isGray(dstFormat))

  2185.             || (isPlanarYUV(dstFormat) && isGray(srcFormat)))

  2186.         {

  2187.             if (isPacked(c->srcFormat))

  2188.                 c->swScale= packedCopy;

  2189.             else /* Planar YUV or gray */

  2190.                 c->swScale= planarCopy;

  2191.         }

  2192. 

  2193.         /* gray16{le,be} conversions */

  2194.         if (isGray16(srcFormat) && (isPlanarYUV(dstFormat) || (dstFormat == PIX_FMT_GRAY8)))

  2195.         {

  2196.             c->swScale= gray16togray;

  2197.         }

  2198.         if ((isPlanarYUV(srcFormat) || (srcFormat == PIX_FMT_GRAY8)) && isGray16(dstFormat))

  2199.         {

  2200.             c->swScale= graytogray16;

  2201.         }

  2202.         if (srcFormat != dstFormat && isGray16(srcFormat) && isGray16(dstFormat))

  2203.         {

  2204.             c->swScale= gray16swap;

  2205.         }

  2206. 

  2207. #ifdef ARCH_BFIN

  2208.         if (flags & SWS_CPU_CAPS_BFIN)

  2209.             ff_bfin_get_unscaled_swscale (c);

  2210. #endif

  2211. 

  2212.         if (c->swScale){

  2213.             if (flags&SWS_PRINT_INFO)

  2214.                 av_log(c, AV_LOG_INFO, "using unscaled %s -> %s special converter\n",

  2215.                                 sws_format_name(srcFormat), sws_format_name(dstFormat));

  2216.             return c;

  2217.         }

  2218.     }

  2219. 

  2220.     if (flags & SWS_CPU_CAPS_MMX2)

  2221.     {

  2222.         c->canMMX2BeUsed= (dstW >=srcW && (dstW&31)==0 && (srcW&15)==0) ? 1 : 0;

  2223.         if (!c->canMMX2BeUsed && dstW >=srcW && (srcW&15)==0 && (flags&SWS_FAST_BILINEAR))

  2224.         {

  2225.             if (flags&SWS_PRINT_INFO)

  2226.                 av_log(c, AV_LOG_INFO, "output Width is not a multiple of 32 -> no MMX2 scaler\n");

  2227.         }

  2228.         if (usesHFilter) c->canMMX2BeUsed=0;

  2229.     }

  2230.     else

  2231.         c->canMMX2BeUsed=0;

  2232. 

  2233.     c->chrXInc= ((c->chrSrcW<<16) + (c->chrDstW>>1))/c->chrDstW;

  2234.     c->chrYInc= ((c->chrSrcH<<16) + (c->chrDstH>>1))/c->chrDstH;

  2235. 

  2236.     // match pixel 0 of the src to pixel 0 of dst and match pixel n-2 of src to pixel n-2 of dst

  2237.     // but only for the FAST_BILINEAR mode otherwise do correct scaling

  2238.     // n-2 is the last chrominance sample available

  2239.     // this is not perfect, but no one should notice the difference, the more correct variant

  2240.     // would be like the vertical one, but that would require some special code for the

  2241.     // first and last pixel

  2242.     if (flags&SWS_FAST_BILINEAR)

  2243.     {

  2244.         if (c->canMMX2BeUsed)

  2245.         {

  2246.             c->lumXInc+= 20;

  2247.             c->chrXInc+= 20;

  2248.         }

  2249.         //we don't use the x86asm scaler if mmx is available

  2250.         else if (flags & SWS_CPU_CAPS_MMX)

  2251.         {

  2252.             c->lumXInc = ((srcW-2)<<16)/(dstW-2) - 20;

  2253.             c->chrXInc = ((c->chrSrcW-2)<<16)/(c->chrDstW-2) - 20;

  2254.         }

  2255.     }

  2256. 

  2257.     /* precalculate horizontal scaler filter coefficients */

  2258.     {

  2259.         const int filterAlign=

  2260.             (flags & SWS_CPU_CAPS_MMX) ? 4 :

  2261.             (flags & SWS_CPU_CAPS_ALTIVEC) ? 8 :

  2262.             1;

  2263. 

  2264.         initFilter(&c->hLumFilter, &c->hLumFilterPos, &c->hLumFilterSize, c->lumXInc,

  2265.                    srcW      ,       dstW, filterAlign, 1<<14,

  2266.                    (flags&SWS_BICUBLIN) ? (flags|SWS_BICUBIC)  : flags,

  2267.                    srcFilter->lumH, dstFilter->lumH, c->param);

  2268.         initFilter(&c->hChrFilter, &c->hChrFilterPos, &c->hChrFilterSize, c->chrXInc,

  2269.                    c->chrSrcW, c->chrDstW, filterAlign, 1<<14,

  2270.                    (flags&SWS_BICUBLIN) ? (flags|SWS_BILINEAR) : flags,

  2271.                    srcFilter->chrH, dstFilter->chrH, c->param);

  2272. 

  2273. #define MAX_FUNNY_CODE_SIZE 10000

  2274. #if defined(COMPILE_MMX2)

  2275. // can't downscale !!!

  2276.         if (c->canMMX2BeUsed && (flags & SWS_FAST_BILINEAR))

  2277.         {

  2278. #ifdef MAP_ANONYMOUS

  2279.             c->funnyYCode = (uint8_t*)mmap(NULL, MAX_FUNNY_CODE_SIZE, PROT_EXEC | PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, 0, 0);

  2280.             c->funnyUVCode = (uint8_t*)mmap(NULL, MAX_FUNNY_CODE_SIZE, PROT_EXEC | PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, 0, 0);

  2281. #else

  2282.             c->funnyYCode = av_malloc(MAX_FUNNY_CODE_SIZE);

  2283.             c->funnyUVCode = av_malloc(MAX_FUNNY_CODE_SIZE);

  2284. #endif

  2285. 

  2286.             c->lumMmx2Filter   = av_malloc((dstW        /8+8)*sizeof(int16_t));

  2287.             c->chrMmx2Filter   = av_malloc((c->chrDstW  /4+8)*sizeof(int16_t));

  2288.             c->lumMmx2FilterPos= av_malloc((dstW      /2/8+8)*sizeof(int32_t));

  2289.             c->chrMmx2FilterPos= av_malloc((c->chrDstW/2/4+8)*sizeof(int32_t));

  2290. 

  2291.             initMMX2HScaler(      dstW, c->lumXInc, c->funnyYCode , c->lumMmx2Filter, c->lumMmx2FilterPos, 8);

  2292.             initMMX2HScaler(c->chrDstW, c->chrXInc, c->funnyUVCode, c->chrMmx2Filter, c->chrMmx2FilterPos, 4);

  2293.         }

  2294. #endif /* defined(COMPILE_MMX2) */

  2295.     } // Init Horizontal stuff

  2296. 

  2297. 

  2298. 

  2299.     /* precalculate vertical scaler filter coefficients */

  2300.     {

  2301.         const int filterAlign=

  2302.             (flags & SWS_CPU_CAPS_MMX) && (flags & SWS_ACCURATE_RND) ? 2 :

  2303.             (flags & SWS_CPU_CAPS_ALTIVEC) ? 8 :

  2304.             1;

  2305. 

  2306.         initFilter(&c->vLumFilter, &c->vLumFilterPos, &c->vLumFilterSize, c->lumYInc,

  2307.                    srcH      ,        dstH, filterAlign, (1<<12)-4,

  2308.                    (flags&SWS_BICUBLIN) ? (flags|SWS_BICUBIC)  : flags,

  2309.                    srcFilter->lumV, dstFilter->lumV, c->param);

  2310.         initFilter(&c->vChrFilter, &c->vChrFilterPos, &c->vChrFilterSize, c->chrYInc,

  2311.                    c->chrSrcH, c->chrDstH, filterAlign, (1<<12)-4,

  2312.                    (flags&SWS_BICUBLIN) ? (flags|SWS_BILINEAR) : flags,

  2313.                    srcFilter->chrV, dstFilter->chrV, c->param);

  2314. 

  2315. #ifdef HAVE_ALTIVEC

  2316.         c->vYCoeffsBank = av_malloc(sizeof (vector signed short)*c->vLumFilterSize*c->dstH);

  2317.         c->vCCoeffsBank = av_malloc(sizeof (vector signed short)*c->vChrFilterSize*c->chrDstH);

  2318. 

  2319.         for (i=0;i<c->vLumFilterSize*c->dstH;i++) {

  2320.             int j;

  2321.             short *p = (short *)&c->vYCoeffsBank[i];

  2322.             for (j=0;j<8;j++)

  2323.                 p[j] = c->vLumFilter[i];

  2324.         }

  2325. 

  2326.         for (i=0;i<c->vChrFilterSize*c->chrDstH;i++) {

  2327.             int j;

  2328.             short *p = (short *)&c->vCCoeffsBank[i];

  2329.             for (j=0;j<8;j++)

  2330.                 p[j] = c->vChrFilter[i];

  2331.         }

  2332. #endif

  2333.     }

  2334. 

  2335.     // Calculate Buffer Sizes so that they won't run out while handling these damn slices

  2336.     c->vLumBufSize= c->vLumFilterSize;

  2337.     c->vChrBufSize= c->vChrFilterSize;

  2338.     for (i=0; i<dstH; i++)

  2339.     {

  2340.         int chrI= i*c->chrDstH / dstH;

  2341.         int nextSlice= FFMAX(c->vLumFilterPos[i   ] + c->vLumFilterSize - 1,

  2342.                            ((c->vChrFilterPos[chrI] + c->vChrFilterSize - 1)<<c->chrSrcVSubSample));

  2343. 

  2344.         nextSlice>>= c->chrSrcVSubSample;

  2345.         nextSlice<<= c->chrSrcVSubSample;

  2346.         if (c->vLumFilterPos[i   ] + c->vLumBufSize < nextSlice)

  2347.             c->vLumBufSize= nextSlice - c->vLumFilterPos[i];

  2348.         if (c->vChrFilterPos[chrI] + c->vChrBufSize < (nextSlice>>c->chrSrcVSubSample))

  2349.             c->vChrBufSize= (nextSlice>>c->chrSrcVSubSample) - c->vChrFilterPos[chrI];

  2350.     }

  2351. 

  2352.     // allocate pixbufs (we use dynamic allocation because otherwise we would need to

  2353.     c->lumPixBuf= av_malloc(c->vLumBufSize*2*sizeof(int16_t*));

  2354.     c->chrPixBuf= av_malloc(c->vChrBufSize*2*sizeof(int16_t*));

  2355.     //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)

  2356.     /* align at 16 bytes for AltiVec */

  2357.     for (i=0; i<c->vLumBufSize; i++)

  2358.         c->lumPixBuf[i]= c->lumPixBuf[i+c->vLumBufSize]= av_mallocz(VOF+1);

  2359.     for (i=0; i<c->vChrBufSize; i++)

  2360.         c->chrPixBuf[i]= c->chrPixBuf[i+c->vChrBufSize]= av_malloc((VOF+1)*2);

  2361. 

  2362.     //try to avoid drawing green stuff between the right end and the stride end

  2363.     for (i=0; i<c->vChrBufSize; i++) memset(c->chrPixBuf[i], 64, (VOF+1)*2);

  2364. 

  2365.     assert(2*VOFW == VOF);

  2366. 

  2367.     assert(c->chrDstH <= dstH);

  2368. 

  2369.     if (flags&SWS_PRINT_INFO)

  2370.     {

  2371. #ifdef DITHER1XBPP

  2372.         const char *dither= " dithered";

  2373. #else

  2374.         const char *dither= "";

  2375. #endif

  2376.         if (flags&SWS_FAST_BILINEAR)

  2377.             av_log(c, AV_LOG_INFO, "FAST_BILINEAR scaler, ");

  2378.         else if (flags&SWS_BILINEAR)

  2379.             av_log(c, AV_LOG_INFO, "BILINEAR scaler, ");

  2380.         else if (flags&SWS_BICUBIC)

  2381.             av_log(c, AV_LOG_INFO, "BICUBIC scaler, ");

  2382.         else if (flags&SWS_X)

  2383.             av_log(c, AV_LOG_INFO, "Experimental scaler, ");

  2384.         else if (flags&SWS_POINT)

  2385.             av_log(c, AV_LOG_INFO, "Nearest Neighbor / POINT scaler, ");

  2386.         else if (flags&SWS_AREA)

  2387.             av_log(c, AV_LOG_INFO, "Area Averageing scaler, ");

  2388.         else if (flags&SWS_BICUBLIN)

  2389.             av_log(c, AV_LOG_INFO, "luma BICUBIC / chroma BILINEAR scaler, ");

  2390.         else if (flags&SWS_GAUSS)

  2391.             av_log(c, AV_LOG_INFO, "Gaussian scaler, ");

  2392.         else if (flags&SWS_SINC)

  2393.             av_log(c, AV_LOG_INFO, "Sinc scaler, ");

  2394.         else if (flags&SWS_LANCZOS)

  2395.             av_log(c, AV_LOG_INFO, "Lanczos scaler, ");

  2396.         else if (flags&SWS_SPLINE)

  2397.             av_log(c, AV_LOG_INFO, "Bicubic spline scaler, ");

  2398.         else

  2399.             av_log(c, AV_LOG_INFO, "ehh flags invalid?! ");

  2400. 

  2401.         if (dstFormat==PIX_FMT_BGR555 || dstFormat==PIX_FMT_BGR565)

  2402.             av_log(c, AV_LOG_INFO, "from %s to%s %s ",

  2403.                    sws_format_name(srcFormat), dither, sws_format_name(dstFormat));

  2404.         else

  2405.             av_log(c, AV_LOG_INFO, "from %s to %s ",

  2406.                    sws_format_name(srcFormat), sws_format_name(dstFormat));

  2407. 

  2408.         if (flags & SWS_CPU_CAPS_MMX2)

  2409.             av_log(c, AV_LOG_INFO, "using MMX2\n");

  2410.         else if (flags & SWS_CPU_CAPS_3DNOW)

  2411.             av_log(c, AV_LOG_INFO, "using 3DNOW\n");

  2412.         else if (flags & SWS_CPU_CAPS_MMX)

  2413.             av_log(c, AV_LOG_INFO, "using MMX\n");

  2414.         else if (flags & SWS_CPU_CAPS_ALTIVEC)

  2415.             av_log(c, AV_LOG_INFO, "using AltiVec\n");

  2416.         else

  2417.             av_log(c, AV_LOG_INFO, "using C\n");

  2418.     }

  2419. 

  2420.     if (flags & SWS_PRINT_INFO)

  2421.     {

  2422.         if (flags & SWS_CPU_CAPS_MMX)

  2423.         {

  2424.             if (c->canMMX2BeUsed && (flags&SWS_FAST_BILINEAR))

  2425.                 av_log(c, AV_LOG_VERBOSE, "using FAST_BILINEAR MMX2 scaler for horizontal scaling\n");

  2426.             else

  2427.             {

  2428.                 if (c->hLumFilterSize==4)

  2429.                     av_log(c, AV_LOG_VERBOSE, "using 4-tap MMX scaler for horizontal luminance scaling\n");

  2430.                 else if (c->hLumFilterSize==8)

  2431.                     av_log(c, AV_LOG_VERBOSE, "using 8-tap MMX scaler for horizontal luminance scaling\n");

  2432.                 else

  2433.                     av_log(c, AV_LOG_VERBOSE, "using n-tap MMX scaler for horizontal luminance scaling\n");

  2434. 

  2435.                 if (c->hChrFilterSize==4)

  2436.                     av_log(c, AV_LOG_VERBOSE, "using 4-tap MMX scaler for horizontal chrominance scaling\n");

  2437.                 else if (c->hChrFilterSize==8)

  2438.                     av_log(c, AV_LOG_VERBOSE, "using 8-tap MMX scaler for horizontal chrominance scaling\n");

  2439.                 else

  2440.                     av_log(c, AV_LOG_VERBOSE, "using n-tap MMX scaler for horizontal chrominance scaling\n");

  2441.             }

  2442.         }

  2443.         else

  2444.         {

  2445. #if defined(ARCH_X86)

  2446.             av_log(c, AV_LOG_VERBOSE, "using X86-Asm scaler for horizontal scaling\n");

  2447. #else

  2448.             if (flags & SWS_FAST_BILINEAR)

  2449.                 av_log(c, AV_LOG_VERBOSE, "using FAST_BILINEAR C scaler for horizontal scaling\n");

  2450.             else

  2451.                 av_log(c, AV_LOG_VERBOSE, "using C scaler for horizontal scaling\n");

  2452. #endif

  2453.         }

  2454.         if (isPlanarYUV(dstFormat))

  2455.         {

  2456.             if (c->vLumFilterSize==1)

  2457.                 av_log(c, AV_LOG_VERBOSE, "using 1-tap %s \"scaler\" for vertical scaling (YV12 like)\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");

  2458.             else

  2459.                 av_log(c, AV_LOG_VERBOSE, "using n-tap %s scaler for vertical scaling (YV12 like)\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");

  2460.         }

  2461.         else

  2462.         {

  2463.             if (c->vLumFilterSize==1 && c->vChrFilterSize==2)

  2464.                 av_log(c, AV_LOG_VERBOSE, "using 1-tap %s \"scaler\" for vertical luminance scaling (BGR)\n"

  2465.                        "      2-tap scaler for vertical chrominance scaling (BGR)\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");

  2466.             else if (c->vLumFilterSize==2 && c->vChrFilterSize==2)

  2467.                 av_log(c, AV_LOG_VERBOSE, "using 2-tap linear %s scaler for vertical scaling (BGR)\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");

  2468.             else

  2469.                 av_log(c, AV_LOG_VERBOSE, "using n-tap %s scaler for vertical scaling (BGR)\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");

  2470.         }

  2471. 

  2472.         if (dstFormat==PIX_FMT_BGR24)

  2473.             av_log(c, AV_LOG_VERBOSE, "using %s YV12->BGR24 Converter\n",

  2474.                    (flags & SWS_CPU_CAPS_MMX2) ? "MMX2" : ((flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C"));

  2475.         else if (dstFormat==PIX_FMT_RGB32)

  2476.             av_log(c, AV_LOG_VERBOSE, "using %s YV12->BGR32 Converter\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");

  2477.         else if (dstFormat==PIX_FMT_BGR565)

  2478.             av_log(c, AV_LOG_VERBOSE, "using %s YV12->BGR16 Converter\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");

  2479.         else if (dstFormat==PIX_FMT_BGR555)

  2480.             av_log(c, AV_LOG_VERBOSE, "using %s YV12->BGR15 Converter\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");

  2481. 

  2482.         av_log(c, AV_LOG_VERBOSE, "%dx%d -> %dx%d\n", srcW, srcH, dstW, dstH);

  2483.     }

  2484.     if (flags & SWS_PRINT_INFO)

  2485.     {

  2486.         av_log(c, AV_LOG_DEBUG, "Lum srcW=%d srcH=%d dstW=%d dstH=%d xInc=%d yInc=%d\n",

  2487.                c->srcW, c->srcH, c->dstW, c->dstH, c->lumXInc, c->lumYInc);

  2488.         av_log(c, AV_LOG_DEBUG, "Chr srcW=%d srcH=%d dstW=%d dstH=%d xInc=%d yInc=%d\n",

  2489.                c->chrSrcW, c->chrSrcH, c->chrDstW, c->chrDstH, c->chrXInc, c->chrYInc);

  2490.     }

  2491. 

  2492.     c->swScale= getSwsFunc(flags);

  2493.     return c;

  2494. }

  2495. 

  2496. /**

  2497.  * swscale wrapper, so we don't need to export the SwsContext.

  2498.  * assumes planar YUV to be in YUV order instead of YVU

  2499.  */

  2500. int sws_scale(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  2501.               int srcSliceH, uint8_t* dst[], int dstStride[]){

  2502.     int i;

  2503.     uint8_t* src2[4]= {src[0], src[1], src[2]};

  2504.     uint32_t pal[256];

  2505.     if (c->sliceDir == 0 && srcSliceY != 0 && srcSliceY + srcSliceH != c->srcH) {

  2506.         av_log(c, AV_LOG_ERROR, "Slices start in the middle!\n");

  2507.         return 0;

  2508.     }

  2509.     if (c->sliceDir == 0) {

  2510.         if (srcSliceY == 0) c->sliceDir = 1; else c->sliceDir = -1;

  2511.     }

  2512. 

  2513.     if (c->srcFormat == PIX_FMT_PAL8){

  2514.         for (i=0; i<256; i++){

  2515.             int p= ((uint32_t*)(src[1]))[i];

  2516.             int r= (p>>16)&0xFF;

  2517.             int g= (p>> 8)&0xFF;

  2518.             int b=  p     &0xFF;

  2519.             int y= av_clip_uint8(((RY*r + GY*g + BY*b)>>RGB2YUV_SHIFT) + 16 );

  2520.             int u= av_clip_uint8(((RU*r + GU*g + BU*b)>>RGB2YUV_SHIFT) + 128);

  2521.             int v= av_clip_uint8(((RV*r + GV*g + BV*b)>>RGB2YUV_SHIFT) + 128);

  2522.             pal[i]= y + (u<<8) + (v<<16);

  2523.         }

  2524.         src2[1]= (uint8_t*)pal;

  2525.     }

  2526. 

  2527.     // copy strides, so they can safely be modified

  2528.     if (c->sliceDir == 1) {

  2529.         // slices go from top to bottom

  2530.         int srcStride2[4]= {srcStride[0], srcStride[1], srcStride[2]};

  2531.         int dstStride2[4]= {dstStride[0], dstStride[1], dstStride[2]};

  2532.         return c->swScale(c, src2, srcStride2, srcSliceY, srcSliceH, dst, dstStride2);

  2533.     } else {

  2534.         // slices go from bottom to top => we flip the image internally

  2535.         uint8_t* dst2[4]= {dst[0] + (c->dstH-1)*dstStride[0],

  2536.                            dst[1] + ((c->dstH>>c->chrDstVSubSample)-1)*dstStride[1],

  2537.                            dst[2] + ((c->dstH>>c->chrDstVSubSample)-1)*dstStride[2]};

  2538.         int srcStride2[4]= {-srcStride[0], -srcStride[1], -srcStride[2]};

  2539.         int dstStride2[4]= {-dstStride[0], -dstStride[1], -dstStride[2]};

  2540. 

  2541.         src2[0] += (srcSliceH-1)*srcStride[0];

  2542.         if (c->srcFormat != PIX_FMT_PAL8)

  2543.             src2[1] += ((srcSliceH>>c->chrSrcVSubSample)-1)*srcStride[1];

  2544.         src2[2] += ((srcSliceH>>c->chrSrcVSubSample)-1)*srcStride[2];

  2545. 

  2546.         return c->swScale(c, src2, srcStride2, c->srcH-srcSliceY-srcSliceH, srcSliceH, dst2, dstStride2);

  2547.     }

  2548. }

  2549. 

  2550. /**

  2551.  * swscale wrapper, so we don't need to export the SwsContext

  2552.  */

  2553. int sws_scale_ordered(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  2554.                       int srcSliceH, uint8_t* dst[], int dstStride[]){

  2555.     return sws_scale(c, src, srcStride, srcSliceY, srcSliceH, dst, dstStride);

  2556. }

  2557. 

  2558. SwsFilter *sws_getDefaultFilter(float lumaGBlur, float chromaGBlur,

  2559.                                 float lumaSharpen, float chromaSharpen,

  2560.                                 float chromaHShift, float chromaVShift,

  2561.                                 int verbose)

  2562. {

  2563.     SwsFilter *filter= av_malloc(sizeof(SwsFilter));

  2564. 

  2565.     if (lumaGBlur!=0.0){

  2566.         filter->lumH= sws_getGaussianVec(lumaGBlur, 3.0);

  2567.         filter->lumV= sws_getGaussianVec(lumaGBlur, 3.0);

  2568.     }else{

  2569.         filter->lumH= sws_getIdentityVec();

  2570.         filter->lumV= sws_getIdentityVec();

  2571.     }

  2572. 

  2573.     if (chromaGBlur!=0.0){

  2574.         filter->chrH= sws_getGaussianVec(chromaGBlur, 3.0);

  2575.         filter->chrV= sws_getGaussianVec(chromaGBlur, 3.0);

  2576.     }else{

  2577.         filter->chrH= sws_getIdentityVec();

  2578.         filter->chrV= sws_getIdentityVec();

  2579.     }

  2580. 

  2581.     if (chromaSharpen!=0.0){

  2582.         SwsVector *id= sws_getIdentityVec();

  2583.         sws_scaleVec(filter->chrH, -chromaSharpen);

  2584.         sws_scaleVec(filter->chrV, -chromaSharpen);

  2585.         sws_addVec(filter->chrH, id);

  2586.         sws_addVec(filter->chrV, id);

  2587.         sws_freeVec(id);

  2588.     }

  2589. 

  2590.     if (lumaSharpen!=0.0){

  2591.         SwsVector *id= sws_getIdentityVec();

  2592.         sws_scaleVec(filter->lumH, -lumaSharpen);

  2593.         sws_scaleVec(filter->lumV, -lumaSharpen);

  2594.         sws_addVec(filter->lumH, id);

  2595.         sws_addVec(filter->lumV, id);

  2596.         sws_freeVec(id);

  2597.     }

  2598. 

  2599.     if (chromaHShift != 0.0)

  2600.         sws_shiftVec(filter->chrH, (int)(chromaHShift+0.5));

  2601. 

  2602.     if (chromaVShift != 0.0)

  2603.         sws_shiftVec(filter->chrV, (int)(chromaVShift+0.5));

  2604. 

  2605.     sws_normalizeVec(filter->chrH, 1.0);

  2606.     sws_normalizeVec(filter->chrV, 1.0);

  2607.     sws_normalizeVec(filter->lumH, 1.0);

  2608.     sws_normalizeVec(filter->lumV, 1.0);

  2609. 

  2610.     if (verbose) sws_printVec(filter->chrH);

  2611.     if (verbose) sws_printVec(filter->lumH);

  2612. 

  2613.     return filter;

  2614. }

  2615. 

  2616. /**

  2617.  * returns a normalized gaussian curve used to filter stuff

  2618.  * quality=3 is high quality, lowwer is lowwer quality

  2619.  */

  2620. SwsVector *sws_getGaussianVec(double variance, double quality){

  2621.     const int length= (int)(variance*quality + 0.5) | 1;

  2622.     int i;

  2623.     double *coeff= av_malloc(length*sizeof(double));

  2624.     double middle= (length-1)*0.5;

  2625.     SwsVector *vec= av_malloc(sizeof(SwsVector));

  2626. 

  2627.     vec->coeff= coeff;

  2628.     vec->length= length;

  2629. 

  2630.     for (i=0; i<length; i++)

  2631.     {

  2632.         double dist= i-middle;

  2633.         coeff[i]= exp(-dist*dist/(2*variance*variance)) / sqrt(2*variance*PI);

  2634.     }

  2635. 

  2636.     sws_normalizeVec(vec, 1.0);

  2637. 

  2638.     return vec;

  2639. }

  2640. 

  2641. SwsVector *sws_getConstVec(double c, int length){

  2642.     int i;

  2643.     double *coeff= av_malloc(length*sizeof(double));

  2644.     SwsVector *vec= av_malloc(sizeof(SwsVector));

  2645. 

  2646.     vec->coeff= coeff;

  2647.     vec->length= length;

  2648. 

  2649.     for (i=0; i<length; i++)

  2650.         coeff[i]= c;

  2651. 

  2652.     return vec;

  2653. }

  2654. 

  2655. 

  2656. SwsVector *sws_getIdentityVec(void){

  2657.     return sws_getConstVec(1.0, 1);

  2658. }

  2659. 

  2660. double sws_dcVec(SwsVector *a){

  2661.     int i;

  2662.     double sum=0;

  2663. 

  2664.     for (i=0; i<a->length; i++)

  2665.         sum+= a->coeff[i];

  2666. 

  2667.     return sum;

  2668. }

  2669. 

  2670. void sws_scaleVec(SwsVector *a, double scalar){

  2671.     int i;

  2672. 

  2673.     for (i=0; i<a->length; i++)

  2674.         a->coeff[i]*= scalar;

  2675. }

  2676. 

  2677. void sws_normalizeVec(SwsVector *a, double height){

  2678.     sws_scaleVec(a, height/sws_dcVec(a));

  2679. }

  2680. 

  2681. static SwsVector *sws_getConvVec(SwsVector *a, SwsVector *b){

  2682.     int length= a->length + b->length - 1;

  2683.     double *coeff= av_malloc(length*sizeof(double));

  2684.     int i, j;

  2685.     SwsVector *vec= av_malloc(sizeof(SwsVector));

  2686. 

  2687.     vec->coeff= coeff;

  2688.     vec->length= length;

  2689. 

  2690.     for (i=0; i<length; i++) coeff[i]= 0.0;

  2691. 

  2692.     for (i=0; i<a->length; i++)

  2693.     {

  2694.         for (j=0; j<b->length; j++)

  2695.         {

  2696.             coeff[i+j]+= a->coeff[i]*b->coeff[j];

  2697.         }

  2698.     }

  2699. 

  2700.     return vec;

  2701. }

  2702. 

  2703. static SwsVector *sws_sumVec(SwsVector *a, SwsVector *b){

  2704.     int length= FFMAX(a->length, b->length);

  2705.     double *coeff= av_malloc(length*sizeof(double));

  2706.     int i;

  2707.     SwsVector *vec= av_malloc(sizeof(SwsVector));

  2708. 

  2709.     vec->coeff= coeff;

  2710.     vec->length= length;

  2711. 

  2712.     for (i=0; i<length; i++) coeff[i]= 0.0;

  2713. 

  2714.     for (i=0; i<a->length; i++) coeff[i + (length-1)/2 - (a->length-1)/2]+= a->coeff[i];

  2715.     for (i=0; i<b->length; i++) coeff[i + (length-1)/2 - (b->length-1)/2]+= b->coeff[i];

  2716. 

  2717.     return vec;

  2718. }

  2719. 

  2720. static SwsVector *sws_diffVec(SwsVector *a, SwsVector *b){

  2721.     int length= FFMAX(a->length, b->length);

  2722.     double *coeff= av_malloc(length*sizeof(double));

  2723.     int i;

  2724.     SwsVector *vec= av_malloc(sizeof(SwsVector));

  2725. 

  2726.     vec->coeff= coeff;

  2727.     vec->length= length;

  2728. 

  2729.     for (i=0; i<length; i++) coeff[i]= 0.0;

  2730. 

  2731.     for (i=0; i<a->length; i++) coeff[i + (length-1)/2 - (a->length-1)/2]+= a->coeff[i];

  2732.     for (i=0; i<b->length; i++) coeff[i + (length-1)/2 - (b->length-1)/2]-= b->coeff[i];

  2733. 

  2734.     return vec;

  2735. }

  2736. 

  2737. /* shift left / or right if "shift" is negative */

  2738. static SwsVector *sws_getShiftedVec(SwsVector *a, int shift){

  2739.     int length= a->length + FFABS(shift)*2;

  2740.     double *coeff= av_malloc(length*sizeof(double));

  2741.     int i;

  2742.     SwsVector *vec= av_malloc(sizeof(SwsVector));

  2743. 

  2744.     vec->coeff= coeff;

  2745.     vec->length= length;

  2746. 

  2747.     for (i=0; i<length; i++) coeff[i]= 0.0;

  2748. 

  2749.     for (i=0; i<a->length; i++)

  2750.     {

  2751.         coeff[i + (length-1)/2 - (a->length-1)/2 - shift]= a->coeff[i];

  2752.     }

  2753. 

  2754.     return vec;

  2755. }

  2756. 

  2757. void sws_shiftVec(SwsVector *a, int shift){

  2758.     SwsVector *shifted= sws_getShiftedVec(a, shift);

  2759.     av_free(a->coeff);

  2760.     a->coeff= shifted->coeff;

  2761.     a->length= shifted->length;

  2762.     av_free(shifted);

  2763. }

  2764. 

  2765. void sws_addVec(SwsVector *a, SwsVector *b){

  2766.     SwsVector *sum= sws_sumVec(a, b);

  2767.     av_free(a->coeff);

  2768.     a->coeff= sum->coeff;

  2769.     a->length= sum->length;

  2770.     av_free(sum);

  2771. }

  2772. 

  2773. void sws_subVec(SwsVector *a, SwsVector *b){

  2774.     SwsVector *diff= sws_diffVec(a, b);

  2775.     av_free(a->coeff);

  2776.     a->coeff= diff->coeff;

  2777.     a->length= diff->length;

  2778.     av_free(diff);

  2779. }

  2780. 

  2781. void sws_convVec(SwsVector *a, SwsVector *b){

  2782.     SwsVector *conv= sws_getConvVec(a, b);

  2783.     av_free(a->coeff);

  2784.     a->coeff= conv->coeff;

  2785.     a->length= conv->length;

  2786.     av_free(conv);

  2787. }

  2788. 

  2789. SwsVector *sws_cloneVec(SwsVector *a){

  2790.     double *coeff= av_malloc(a->length*sizeof(double));

  2791.     int i;

  2792.     SwsVector *vec= av_malloc(sizeof(SwsVector));

  2793. 

  2794.     vec->coeff= coeff;

  2795.     vec->length= a->length;

  2796. 

  2797.     for (i=0; i<a->length; i++) coeff[i]= a->coeff[i];

  2798. 

  2799.     return vec;

  2800. }

  2801. 

  2802. void sws_printVec(SwsVector *a){

  2803.     int i;

  2804.     double max=0;

  2805.     double min=0;

  2806.     double range;

  2807. 

  2808.     for (i=0; i<a->length; i++)

  2809.         if (a->coeff[i]>max) max= a->coeff[i];

  2810. 

  2811.     for (i=0; i<a->length; i++)

  2812.         if (a->coeff[i]<min) min= a->coeff[i];

  2813. 

  2814.     range= max - min;

  2815. 

  2816.     for (i=0; i<a->length; i++)

  2817.     {

  2818.         int x= (int)((a->coeff[i]-min)*60.0/range +0.5);

  2819.         av_log(NULL, AV_LOG_DEBUG, "%1.3f ", a->coeff[i]);

  2820.         for (;x>0; x--) av_log(NULL, AV_LOG_DEBUG, " ");

  2821.         av_log(NULL, AV_LOG_DEBUG, "|\n");

  2822.     }

  2823. }

  2824. 

  2825. void sws_freeVec(SwsVector *a){

  2826.     if (!a) return;

  2827.     av_freep(&a->coeff);

  2828.     a->length=0;

  2829.     av_free(a);

  2830. }

  2831. 

  2832. void sws_freeFilter(SwsFilter *filter){

  2833.     if (!filter) return;

  2834. 

  2835.     if (filter->lumH) sws_freeVec(filter->lumH);

  2836.     if (filter->lumV) sws_freeVec(filter->lumV);

  2837.     if (filter->chrH) sws_freeVec(filter->chrH);

  2838.     if (filter->chrV) sws_freeVec(filter->chrV);

  2839.     av_free(filter);

  2840. }

  2841. 

  2842. 

  2843. void sws_freeContext(SwsContext *c){

  2844.     int i;

  2845.     if (!c) return;

  2846. 

  2847.     if (c->lumPixBuf)

  2848.     {

  2849.         for (i=0; i<c->vLumBufSize; i++)

  2850.             av_freep(&c->lumPixBuf[i]);

  2851.         av_freep(&c->lumPixBuf);

  2852.     }

  2853. 

  2854.     if (c->chrPixBuf)

  2855.     {

  2856.         for (i=0; i<c->vChrBufSize; i++)

  2857.             av_freep(&c->chrPixBuf[i]);

  2858.         av_freep(&c->chrPixBuf);

  2859.     }

  2860. 

  2861.     av_freep(&c->vLumFilter);

  2862.     av_freep(&c->vChrFilter);

  2863.     av_freep(&c->hLumFilter);

  2864.     av_freep(&c->hChrFilter);

  2865. #ifdef HAVE_ALTIVEC

  2866.     av_freep(&c->vYCoeffsBank);

  2867.     av_freep(&c->vCCoeffsBank);

  2868. #endif

  2869. 

  2870.     av_freep(&c->vLumFilterPos);

  2871.     av_freep(&c->vChrFilterPos);

  2872.     av_freep(&c->hLumFilterPos);

  2873.     av_freep(&c->hChrFilterPos);

  2874. 

  2875. #if defined(ARCH_X86) && defined(CONFIG_GPL)

  2876. #ifdef MAP_ANONYMOUS

  2877.     if (c->funnyYCode) munmap(c->funnyYCode, MAX_FUNNY_CODE_SIZE);

  2878.     if (c->funnyUVCode) munmap(c->funnyUVCode, MAX_FUNNY_CODE_SIZE);

  2879. #else

  2880.     av_free(c->funnyYCode);

  2881.     av_free(c->funnyUVCode);

  2882. #endif

  2883.     c->funnyYCode=NULL;

  2884.     c->funnyUVCode=NULL;

  2885. #endif /* defined(ARCH_X86) */

  2886. 

  2887.     av_freep(&c->lumMmx2Filter);

  2888.     av_freep(&c->chrMmx2Filter);

  2889.     av_freep(&c->lumMmx2FilterPos);

  2890.     av_freep(&c->chrMmx2FilterPos);

  2891.     av_freep(&c->yuvTable);

  2892. 

  2893.     av_free(c);

  2894. }

  2895. 

  2896. /**

  2897.  * Checks if context is valid or reallocs a new one instead.

  2898.  * If context is NULL, just calls sws_getContext() to get a new one.

  2899.  * Otherwise, checks if the parameters are the same already saved in context.

  2900.  * If that is the case, returns the current context.

  2901.  * Otherwise, frees context and gets a new one.

  2902.  *

  2903.  * Be warned that srcFilter, dstFilter are not checked, they are

  2904.  * asumed to remain valid.

  2905.  */

  2906. struct SwsContext *sws_getCachedContext(struct SwsContext *context,

  2907.                                         int srcW, int srcH, int srcFormat,

  2908.                                         int dstW, int dstH, int dstFormat, int flags,

  2909.                                         SwsFilter *srcFilter, SwsFilter *dstFilter, double *param)

  2910. {

  2911.     static const double default_param[2] = {SWS_PARAM_DEFAULT, SWS_PARAM_DEFAULT};

  2912. 

  2913.     if (!param)

  2914.         param = default_param;

  2915. 

  2916.     if (context) {

  2917.         if (context->srcW != srcW || context->srcH != srcH ||

  2918.             context->srcFormat != srcFormat ||

  2919.             context->dstW != dstW || context->dstH != dstH ||

  2920.             context->dstFormat != dstFormat || context->flags != flags ||

  2921.             context->param[0] != param[0] || context->param[1] != param[1])

  2922.         {

  2923.             sws_freeContext(context);

  2924.             context = NULL;

  2925.         }

  2926.     }

  2927.     if (!context) {

  2928.         return sws_getContext(srcW, srcH, srcFormat,

  2929.                               dstW, dstH, dstFormat, flags,

  2930.                               srcFilter, dstFilter, param);

  2931.     }

  2932.     return context;

  2933. }