falkTX
/
FFmpeg
mirror of https://github.com/falkTX/FFmpeg.git
1
0
Fork 0
Code Issues 0 Releases 338 Wiki Activity
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
15934 Commits
32 Branches
1.0GB
Tree: 2e889ae4b9
Branches Tags
${ item.name }
Create branch ${ searchTerm }
from '2e889ae4b9'
${ noResults }
FFmpeg/libswscale/swscale.c

3011 lines
101KB
Raw Blame History 

  1. /*

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

  3.  *

  4.  * This file is part of FFmpeg.

  5.  *

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

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

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

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

  10.  *

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

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

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

  14.  * GNU General Public License for more details.

  15.  *

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

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

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

  19.  *

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

  21.  * under the LGPL license too

  22.  */

  23. 

  24. /*

  25.   supported Input formats: YV12, I420/IYUV, YUY2, UYVY, BGR32, BGR32_1, BGR24, BGR16, BGR15, RGB32, RGB32_1, RGB24, Y8/Y800, YVU9/IF09, PAL8

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

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

  28. 

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

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

  31.   x -> x

  32.   YUV9 -> YV12

  33.   YUV9/YV12 -> Y800

  34.   Y800 -> YUV9/YV12

  35.   BGR24 -> BGR32 & RGB24 -> RGB32

  36.   BGR32 -> BGR24 & RGB32 -> RGB24

  37.   BGR15 -> BGR16

  38. */

  39. 

  40. /*

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

  42.  YV12 -> BGR16

  43.  YV12 -> YV12

  44.  BGR15 -> BGR16

  45.  BGR16 -> BGR16

  46.  YVU9 -> YV12

  47. 

  48. untested special converters

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

  50.   YV12/I420 -> YV12/I420

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

  52.   BGR24 -> BGR32 & RGB24 -> RGB32

  53.   BGR32 -> BGR24 & RGB32 -> RGB24

  54.   BGR24 -> YV12

  55. */

  56. 

  57. #define _SVID_SOURCE //needed for MAP_ANONYMOUS

  58. #include <inttypes.h>

  59. #include <string.h>

  60. #include <math.h>

  61. #include <stdio.h>

  62. #include <unistd.h>

  63. #include "config.h"

  64. #include <assert.h>

  65. #ifdef HAVE_SYS_MMAN_H

  66. #include <sys/mman.h>

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

  68. #define MAP_ANONYMOUS MAP_ANON

  69. #endif

  70. #endif

  71. #include "swscale.h"

  72. #include "swscale_internal.h"

  73. #include "rgb2rgb.h"

  74. #include "libavutil/x86_cpu.h"

  75. #include "libavutil/bswap.h"

  76. 

  77. unsigned swscale_version(void)

  78. {

  79.     return LIBSWSCALE_VERSION_INT;

  80. }

  81. 

  82. #undef MOVNTQ

  83. #undef PAVGB

  84. 

  85. //#undef HAVE_MMX2

  86. //#define HAVE_3DNOW

  87. //#undef HAVE_MMX

  88. //#undef ARCH_X86

  89. //#define WORDS_BIGENDIAN

  90. #define DITHER1XBPP

  91. 

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

  93. 

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

  95. 

  96. #ifdef M_PI

  97. #define PI M_PI

  98. #else

  99. #define PI 3.14159265358979323846

  100. #endif

  101. 

  102. #define isSupportedIn(x)    (       \

  103.            (x)==PIX_FMT_YUV420P     \

  104.         || (x)==PIX_FMT_YUVA420P    \

  105.         || (x)==PIX_FMT_YUYV422     \

  106.         || (x)==PIX_FMT_UYVY422     \

  107.         || (x)==PIX_FMT_RGB32       \

  108.         || (x)==PIX_FMT_RGB32_1     \

  109.         || (x)==PIX_FMT_BGR24       \

  110.         || (x)==PIX_FMT_BGR565      \

  111.         || (x)==PIX_FMT_BGR555      \

  112.         || (x)==PIX_FMT_BGR32       \

  113.         || (x)==PIX_FMT_BGR32_1     \

  114.         || (x)==PIX_FMT_RGB24       \

  115.         || (x)==PIX_FMT_RGB565      \

  116.         || (x)==PIX_FMT_RGB555      \

  117.         || (x)==PIX_FMT_GRAY8       \

  118.         || (x)==PIX_FMT_YUV410P     \

  119.         || (x)==PIX_FMT_YUV440P     \

  120.         || (x)==PIX_FMT_GRAY16BE    \

  121.         || (x)==PIX_FMT_GRAY16LE    \

  122.         || (x)==PIX_FMT_YUV444P     \

  123.         || (x)==PIX_FMT_YUV422P     \

  124.         || (x)==PIX_FMT_YUV411P     \

  125.         || (x)==PIX_FMT_PAL8        \

  126.         || (x)==PIX_FMT_BGR8        \

  127.         || (x)==PIX_FMT_RGB8        \

  128.         || (x)==PIX_FMT_BGR4_BYTE   \

  129.         || (x)==PIX_FMT_RGB4_BYTE   \

  130.         || (x)==PIX_FMT_YUV440P     \

  131.         || (x)==PIX_FMT_MONOWHITE   \

  132.         || (x)==PIX_FMT_MONOBLACK   \

  133.     )

  134. #define isSupportedOut(x)   (       \

  135.            (x)==PIX_FMT_YUV420P     \

  136.         || (x)==PIX_FMT_YUYV422     \

  137.         || (x)==PIX_FMT_UYVY422     \

  138.         || (x)==PIX_FMT_YUV444P     \

  139.         || (x)==PIX_FMT_YUV422P     \

  140.         || (x)==PIX_FMT_YUV411P     \

  141.         || isRGB(x)                 \

  142.         || isBGR(x)                 \

  143.         || (x)==PIX_FMT_NV12        \

  144.         || (x)==PIX_FMT_NV21        \

  145.         || (x)==PIX_FMT_GRAY16BE    \

  146.         || (x)==PIX_FMT_GRAY16LE    \

  147.         || (x)==PIX_FMT_GRAY8       \

  148.         || (x)==PIX_FMT_YUV410P     \

  149.         || (x)==PIX_FMT_YUV440P     \

  150.     )

  151. #define isPacked(x)         (       \

  152.            (x)==PIX_FMT_PAL8        \

  153.         || (x)==PIX_FMT_YUYV422     \

  154.         || (x)==PIX_FMT_UYVY422     \

  155.         || isRGB(x)                 \

  156.         || isBGR(x)                 \

  157.     )

  158. 

  159. #define RGB2YUV_SHIFT 15

  160. #define BY ( (int)(0.114*219/255*(1<<RGB2YUV_SHIFT)+0.5))

  161. #define BV (-(int)(0.081*224/255*(1<<RGB2YUV_SHIFT)+0.5))

  162. #define BU ( (int)(0.500*224/255*(1<<RGB2YUV_SHIFT)+0.5))

  163. #define GY ( (int)(0.587*219/255*(1<<RGB2YUV_SHIFT)+0.5))

  164. #define GV (-(int)(0.419*224/255*(1<<RGB2YUV_SHIFT)+0.5))

  165. #define GU (-(int)(0.331*224/255*(1<<RGB2YUV_SHIFT)+0.5))

  166. #define RY ( (int)(0.299*219/255*(1<<RGB2YUV_SHIFT)+0.5))

  167. #define RV ( (int)(0.500*224/255*(1<<RGB2YUV_SHIFT)+0.5))

  168. #define RU (-(int)(0.169*224/255*(1<<RGB2YUV_SHIFT)+0.5))

  169. 

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

  171. 

  172. static const double rgb2yuv_table[8][9]={

  173.     {0.7152, 0.0722, 0.2126, -0.386, 0.5, -0.115, -0.454, -0.046, 0.5},

  174.     {0.7152, 0.0722, 0.2126, -0.386, 0.5, -0.115, -0.454, -0.046, 0.5},

  175.     {0.587 , 0.114 , 0.299 , -0.331, 0.5, -0.169, -0.419, -0.081, 0.5},

  176.     {0.587 , 0.114 , 0.299 , -0.331, 0.5, -0.169, -0.419, -0.081, 0.5},

  177.     {0.59  , 0.11  , 0.30  , -0.331, 0.5, -0.169, -0.421, -0.079, 0.5}, //FCC

  178.     {0.587 , 0.114 , 0.299 , -0.331, 0.5, -0.169, -0.419, -0.081, 0.5},

  179.     {0.587 , 0.114 , 0.299 , -0.331, 0.5, -0.169, -0.419, -0.081, 0.5}, //SMPTE 170M

  180.     {0.701 , 0.087 , 0.212 , -0.384, 0.5  -0.116, -0.445, -0.055, 0.5}, //SMPTE 240M

  181. };

  182. 

  183. /*

  184. NOTES

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

  186. 

  187. TODO

  188. more intelligent misalignment avoidance for the horizontal scaler

  189. write special vertical cubic upscale version

  190. Optimize C code (yv12 / minmax)

  191. add support for packed pixel yuv input & output

  192. add support for Y8 output

  193. optimize bgr24 & bgr32

  194. add BGR4 output support

  195. write special BGR->BGR scaler

  196. */

  197. 

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

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

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

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

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

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

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

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

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

  207. 

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

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

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

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

  212. 

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

  214.         0x0103010301030103LL,

  215.         0x0200020002000200LL,};

  216. 

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

  218.         0x0602060206020602LL,

  219.         0x0004000400040004LL,};

  220. 

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

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

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

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

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

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

  227. 

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

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

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

  231. 

  232. #ifdef FAST_BGR2YV12

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

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

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

  236. #else

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

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

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

  240. #endif /* FAST_BGR2YV12 */

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

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

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

  244. 

  245. DECLARE_ALIGNED(8, const uint64_t, ff_bgr24toY1Coeff) = 0x0C88000040870C88ULL;

  246. DECLARE_ALIGNED(8, const uint64_t, ff_bgr24toY2Coeff) = 0x20DE4087000020DEULL;

  247. DECLARE_ALIGNED(8, const uint64_t, ff_rgb24toY1Coeff) = 0x20DE0000408720DEULL;

  248. DECLARE_ALIGNED(8, const uint64_t, ff_rgb24toY2Coeff) = 0x0C88408700000C88ULL;

  249. DECLARE_ALIGNED(8, const uint64_t, ff_bgr24toYOffset) = 0x0008400000084000ULL;

  250. 

  251. DECLARE_ALIGNED(8, const uint64_t, ff_bgr24toUV[2][4]) = {

  252.     {0x38380000DAC83838ULL, 0xECFFDAC80000ECFFULL, 0xF6E40000D0E3F6E4ULL, 0x3838D0E300003838ULL},

  253.     {0xECFF0000DAC8ECFFULL, 0x3838DAC800003838ULL, 0x38380000D0E33838ULL, 0xF6E4D0E30000F6E4ULL},

  254. };

  255. 

  256. DECLARE_ALIGNED(8, const uint64_t, ff_bgr24toUVOffset)= 0x0040400000404000ULL;

  257. 

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

  259. 

  260. // clipping helper table for C implementations:

  261. static unsigned char clip_table[768];

  262. 

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

  264. 

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

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

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

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

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

  270. 

  271. const char *sws_format_name(enum PixelFormat format)

  272. {

  273.     switch (format) {

  274.         case PIX_FMT_YUV420P:

  275.             return "yuv420p";

  276.         case PIX_FMT_YUVA420P:

  277.             return "yuva420p";

  278.         case PIX_FMT_YUYV422:

  279.             return "yuyv422";

  280.         case PIX_FMT_RGB24:

  281.             return "rgb24";

  282.         case PIX_FMT_BGR24:

  283.             return "bgr24";

  284.         case PIX_FMT_YUV422P:

  285.             return "yuv422p";

  286.         case PIX_FMT_YUV444P:

  287.             return "yuv444p";

  288.         case PIX_FMT_RGB32:

  289.             return "rgb32";

  290.         case PIX_FMT_YUV410P:

  291.             return "yuv410p";

  292.         case PIX_FMT_YUV411P:

  293.             return "yuv411p";

  294.         case PIX_FMT_RGB565:

  295.             return "rgb565";

  296.         case PIX_FMT_RGB555:

  297.             return "rgb555";

  298.         case PIX_FMT_GRAY16BE:

  299.             return "gray16be";

  300.         case PIX_FMT_GRAY16LE:

  301.             return "gray16le";

  302.         case PIX_FMT_GRAY8:

  303.             return "gray8";

  304.         case PIX_FMT_MONOWHITE:

  305.             return "mono white";

  306.         case PIX_FMT_MONOBLACK:

  307.             return "mono black";

  308.         case PIX_FMT_PAL8:

  309.             return "Palette";

  310.         case PIX_FMT_YUVJ420P:

  311.             return "yuvj420p";

  312.         case PIX_FMT_YUVJ422P:

  313.             return "yuvj422p";

  314.         case PIX_FMT_YUVJ444P:

  315.             return "yuvj444p";

  316.         case PIX_FMT_XVMC_MPEG2_MC:

  317.             return "xvmc_mpeg2_mc";

  318.         case PIX_FMT_XVMC_MPEG2_IDCT:

  319.             return "xvmc_mpeg2_idct";

  320.         case PIX_FMT_UYVY422:

  321.             return "uyvy422";

  322.         case PIX_FMT_UYYVYY411:

  323.             return "uyyvyy411";

  324.         case PIX_FMT_RGB32_1:

  325.             return "rgb32x";

  326.         case PIX_FMT_BGR32_1:

  327.             return "bgr32x";

  328.         case PIX_FMT_BGR32:

  329.             return "bgr32";

  330.         case PIX_FMT_BGR565:

  331.             return "bgr565";

  332.         case PIX_FMT_BGR555:

  333.             return "bgr555";

  334.         case PIX_FMT_BGR8:

  335.             return "bgr8";

  336.         case PIX_FMT_BGR4:

  337.             return "bgr4";

  338.         case PIX_FMT_BGR4_BYTE:

  339.             return "bgr4 byte";

  340.         case PIX_FMT_RGB8:

  341.             return "rgb8";

  342.         case PIX_FMT_RGB4:

  343.             return "rgb4";

  344.         case PIX_FMT_RGB4_BYTE:

  345.             return "rgb4 byte";

  346.         case PIX_FMT_NV12:

  347.             return "nv12";

  348.         case PIX_FMT_NV21:

  349.             return "nv21";

  350.         case PIX_FMT_YUV440P:

  351.             return "yuv440p";

  352.         default:

  353.             return "Unknown format";

  354.     }

  355. }

  356. 

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

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

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

  360. {

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

  362.     int i;

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

  364.     {

  365.         int val=1<<18;

  366.         int j;

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

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

  369. 

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

  371.     }

  372. 

  373.     if (uDest)

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

  375.         {

  376.             int u=1<<18;

  377.             int v=1<<18;

  378.             int j;

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

  380.             {

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

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

  383.             }

  384. 

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

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

  387.         }

  388. }

  389. 

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

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

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

  393. {

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

  395.     int i;

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

  397.     {

  398.         int val=1<<18;

  399.         int j;

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

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

  402. 

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

  404.     }

  405. 

  406.     if (!uDest)

  407.         return;

  408. 

  409.     if (dstFormat == PIX_FMT_NV12)

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

  411.         {

  412.             int u=1<<18;

  413.             int v=1<<18;

  414.             int j;

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

  416.             {

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

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

  419.             }

  420. 

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

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

  423.         }

  424.     else

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

  426.         {

  427.             int u=1<<18;

  428.             int v=1<<18;

  429.             int j;

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

  431.             {

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

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

  434.             }

  435. 

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

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

  438.         }

  439. }

  440. 

  441. #define YSCALE_YUV_2_PACKEDX_NOCLIP_C(type) \

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

  443.         int j;\

  444.         int Y1 = 1<<18;\

  445.         int Y2 = 1<<18;\

  446.         int U  = 1<<18;\

  447.         int V  = 1<<18;\

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

  449.         const int i2= 2*i;\

  450.         \

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

  452.         {\

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

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

  455.         }\

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

  457.         {\

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

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

  460.         }\

  461.         Y1>>=19;\

  462.         Y2>>=19;\

  463.         U >>=19;\

  464.         V >>=19;\

  465. 

  466. #define YSCALE_YUV_2_PACKEDX_C(type) \

  467.         YSCALE_YUV_2_PACKEDX_NOCLIP_C(type)\

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

  469.         {\

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

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

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

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

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

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

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

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

  478.         }

  479. 

  480. #define YSCALE_YUV_2_PACKEDX_FULL_C \

  481.     for (i=0; i<dstW; i++){\

  482.         int j;\

  483.         int Y = 0;\

  484.         int U = -128<<19;\

  485.         int V = -128<<19;\

  486.         int R,G,B;\

  487.         \

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

  489.             Y += lumSrc[j][i     ] * lumFilter[j];\

  490.         }\

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

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

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

  494.         }\

  495.         Y >>=10;\

  496.         U >>=10;\

  497.         V >>=10;\

  498. 

  499. #define YSCALE_YUV_2_RGBX_FULL_C(rnd) \

  500.     YSCALE_YUV_2_PACKEDX_FULL_C\

  501.         Y-= c->yuv2rgb_y_offset;\

  502.         Y*= c->yuv2rgb_y_coeff;\

  503.         Y+= rnd;\

  504.         R= Y + V*c->yuv2rgb_v2r_coeff;\

  505.         G= Y + V*c->yuv2rgb_v2g_coeff + U*c->yuv2rgb_u2g_coeff;\

  506.         B= Y +                          U*c->yuv2rgb_u2b_coeff;\

  507.         if ((R|G|B)&(0xC0000000)){\

  508.             if (R>=(256<<22))   R=(256<<22)-1; \

  509.             else if (R<0)R=0;   \

  510.             if (G>=(256<<22))   G=(256<<22)-1; \

  511.             else if (G<0)G=0;   \

  512.             if (B>=(256<<22))   B=(256<<22)-1; \

  513.             else if (B<0)B=0;   \

  514.         }\

  515. 

  516. 

  517. #define YSCALE_YUV_2_GRAY16_C \

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

  519.         int j;\

  520.         int Y1 = 1<<18;\

  521.         int Y2 = 1<<18;\

  522.         int U  = 1<<18;\

  523.         int V  = 1<<18;\

  524.         \

  525.         const int i2= 2*i;\

  526.         \

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

  528.         {\

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

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

  531.         }\

  532.         Y1>>=11;\

  533.         Y2>>=11;\

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

  535.         {\

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

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

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

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

  540.         }

  541. 

  542. #define YSCALE_YUV_2_RGBX_C(type) \

  543.     YSCALE_YUV_2_PACKEDX_C(type)  /* FIXME fix tables so that cliping is not needed and then use _NOCLIP*/\

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

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

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

  547. 

  548. #define YSCALE_YUV_2_PACKED2_C   \

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

  550.         const int i2= 2*i;       \

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

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

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

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

  555. 

  556. #define YSCALE_YUV_2_GRAY16_2_C   \

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

  558.         const int i2= 2*i;       \

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

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

  561. 

  562. #define YSCALE_YUV_2_RGB2_C(type) \

  563.     YSCALE_YUV_2_PACKED2_C\

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

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

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

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

  568. 

  569. #define YSCALE_YUV_2_PACKED1_C \

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

  571.         const int i2= 2*i;\

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

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

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

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

  576. 

  577. #define YSCALE_YUV_2_GRAY16_1_C \

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

  579.         const int i2= 2*i;\

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

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

  582. 

  583. #define YSCALE_YUV_2_RGB1_C(type) \

  584.     YSCALE_YUV_2_PACKED1_C\

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

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

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

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

  589. 

  590. #define YSCALE_YUV_2_PACKED1B_C \

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

  592.         const int i2= 2*i;\

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

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

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

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

  597. 

  598. #define YSCALE_YUV_2_RGB1B_C(type) \

  599.     YSCALE_YUV_2_PACKED1B_C\

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

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

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

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

  604. 

  605. #define YSCALE_YUV_2_MONO2_C \

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

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

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

  609.         int acc;\

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

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

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

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

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

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

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

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

  618.         ((uint8_t*)dest)[0]= c->dstFormat == PIX_FMT_MONOBLACK ? acc : ~acc;\

  619.         dest++;\

  620.     }\

  621. 

  622. 

  623. #define YSCALE_YUV_2_MONOX_C \

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

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

  626.     int acc=0;\

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

  628.         int j;\

  629.         int Y1=1<<18;\

  630.         int Y2=1<<18;\

  631. \

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

  633.         {\

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

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

  636.         }\

  637.         Y1>>=19;\

  638.         Y2>>=19;\

  639.         if ((Y1|Y2)&256)\

  640.         {\

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

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

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

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

  645.         }\

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

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

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

  649.             ((uint8_t*)dest)[0]= c->dstFormat == PIX_FMT_MONOBLACK ? acc : ~acc;\

  650.             dest++;\

  651.         }\

  652.     }

  653. 

  654. 

  655. #define YSCALE_YUV_2_ANYRGB_C(func, func2, func_g16, func_monoblack)\

  656.     switch(c->dstFormat)\

  657.     {\

  658.     case PIX_FMT_RGB32:\

  659.     case PIX_FMT_BGR32:\

  660.     case PIX_FMT_RGB32_1:\

  661.     case PIX_FMT_BGR32_1:\

  662.         func(uint32_t)\

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

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

  665.         }                \

  666.         break;\

  667.     case PIX_FMT_RGB24:\

  668.         func(uint8_t)\

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

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

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

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

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

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

  675.             dest+=6;\

  676.         }\

  677.         break;\

  678.     case PIX_FMT_BGR24:\

  679.         func(uint8_t)\

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

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

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

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

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

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

  686.             dest+=6;\

  687.         }\

  688.         break;\

  689.     case PIX_FMT_RGB565:\

  690.     case PIX_FMT_BGR565:\

  691.         {\

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

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

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

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

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

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

  698.             func(uint16_t)\

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

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

  701.             }\

  702.         }\

  703.         break;\

  704.     case PIX_FMT_RGB555:\

  705.     case PIX_FMT_BGR555:\

  706.         {\

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

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

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

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

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

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

  713.             func(uint16_t)\

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

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

  716.             }\

  717.         }\

  718.         break;\

  719.     case PIX_FMT_RGB8:\

  720.     case PIX_FMT_BGR8:\

  721.         {\

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

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

  724.             func(uint8_t)\

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

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

  727.             }\

  728.         }\

  729.         break;\

  730.     case PIX_FMT_RGB4:\

  731.     case PIX_FMT_BGR4:\

  732.         {\

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

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

  735.             func(uint8_t)\

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

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

  738.             }\

  739.         }\

  740.         break;\

  741.     case PIX_FMT_RGB4_BYTE:\

  742.     case PIX_FMT_BGR4_BYTE:\

  743.         {\

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

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

  746.             func(uint8_t)\

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

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

  749.             }\

  750.         }\

  751.         break;\

  752.     case PIX_FMT_MONOBLACK:\

  753.     case PIX_FMT_MONOWHITE:\

  754.         {\

  755.             func_monoblack\

  756.         }\

  757.         break;\

  758.     case PIX_FMT_YUYV422:\

  759.         func2\

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

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

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

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

  764.         }                \

  765.         break;\

  766.     case PIX_FMT_UYVY422:\

  767.         func2\

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

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

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

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

  772.         }                \

  773.         break;\

  774.     case PIX_FMT_GRAY16BE:\

  775.         func_g16\

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

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

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

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

  780.         }                \

  781.         break;\

  782.     case PIX_FMT_GRAY16LE:\

  783.         func_g16\

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

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

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

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

  788.         }                \

  789.         break;\

  790.     }\

  791. 

  792. 

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

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

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

  796. {

  797.     int i;

  798.     YSCALE_YUV_2_ANYRGB_C(YSCALE_YUV_2_RGBX_C, YSCALE_YUV_2_PACKEDX_C(void), YSCALE_YUV_2_GRAY16_C, YSCALE_YUV_2_MONOX_C)

  799. }

  800. 

  801. static inline void yuv2rgbXinC_full(SwsContext *c, int16_t *lumFilter, int16_t **lumSrc, int lumFilterSize,

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

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

  804. {

  805.     int i;

  806.     int step= fmt_depth(c->dstFormat)/8;

  807. 

  808.     switch(c->dstFormat){

  809.     case PIX_FMT_ARGB:

  810.         dest++;

  811.     case PIX_FMT_RGB24:

  812.     case PIX_FMT_RGBA:

  813.         YSCALE_YUV_2_RGBX_FULL_C(1<<21)

  814.             dest[0]= R>>22;

  815.             dest[1]= G>>22;

  816.             dest[2]= B>>22;

  817.             dest[3]= 0;

  818.             dest+= step;

  819.         }

  820.         break;

  821.     case PIX_FMT_ABGR:

  822.         dest++;

  823.     case PIX_FMT_BGR24:

  824.     case PIX_FMT_BGRA:

  825.         YSCALE_YUV_2_RGBX_FULL_C(1<<21)

  826.             dest[0]= B>>22;

  827.             dest[1]= G>>22;

  828.             dest[2]= R>>22;

  829.             dest[3]= 0;

  830.             dest+= step;

  831.         }

  832.         break;

  833.     default:

  834.         assert(0);

  835.     }

  836. }

  837. 

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

  839. //Plain C versions

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

  841. #define COMPILE_C

  842. #endif

  843. 

  844. #ifdef ARCH_POWERPC

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

  846. #define COMPILE_ALTIVEC

  847. #endif //HAVE_ALTIVEC

  848. #endif //ARCH_POWERPC

  849. 

  850. #if defined(ARCH_X86)

  851. 

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

  853. #define COMPILE_MMX

  854. #endif

  855. 

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

  857. #define COMPILE_MMX2

  858. #endif

  859. 

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

  861. #define COMPILE_3DNOW

  862. #endif

  863. #endif //ARCH_X86 || ARCH_X86_64

  864. 

  865. #undef HAVE_MMX

  866. #undef HAVE_MMX2

  867. #undef HAVE_3DNOW

  868. 

  869. #ifdef COMPILE_C

  870. #undef HAVE_MMX

  871. #undef HAVE_MMX2

  872. #undef HAVE_3DNOW

  873. #undef HAVE_ALTIVEC

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

  875. #include "swscale_template.c"

  876. #endif

  877. 

  878. #ifdef COMPILE_ALTIVEC

  879. #undef RENAME

  880. #define HAVE_ALTIVEC

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

  882. #include "swscale_template.c"

  883. #endif

  884. 

  885. #if defined(ARCH_X86)

  886. 

  887. //X86 versions

  888. /*

  889. #undef RENAME

  890. #undef HAVE_MMX

  891. #undef HAVE_MMX2

  892. #undef HAVE_3DNOW

  893. #define ARCH_X86

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

  895. #include "swscale_template.c"

  896. */

  897. //MMX versions

  898. #ifdef COMPILE_MMX

  899. #undef RENAME

  900. #define HAVE_MMX

  901. #undef HAVE_MMX2

  902. #undef HAVE_3DNOW

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

  904. #include "swscale_template.c"

  905. #endif

  906. 

  907. //MMX2 versions

  908. #ifdef COMPILE_MMX2

  909. #undef RENAME

  910. #define HAVE_MMX

  911. #define HAVE_MMX2

  912. #undef HAVE_3DNOW

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

  914. #include "swscale_template.c"

  915. #endif

  916. 

  917. //3DNOW versions

  918. #ifdef COMPILE_3DNOW

  919. #undef RENAME

  920. #define HAVE_MMX

  921. #undef HAVE_MMX2

  922. #define HAVE_3DNOW

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

  924. #include "swscale_template.c"

  925. #endif

  926. 

  927. #endif //ARCH_X86 || ARCH_X86_64

  928. 

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

  930. 

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

  932. {

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

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

  935.     else                return getSplineCoeff(        0.0,

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

  937.                                                     c + 3.0*d,

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

  939.                                             dist-1.0);

  940. }

  941. 

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

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

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

  945. {

  946.     int i;

  947.     int filterSize;

  948.     int filter2Size;

  949.     int minFilterSize;

  950.     double *filter=NULL;

  951.     double *filter2=NULL;

  952.     int ret= -1;

  953. #if defined(ARCH_X86)

  954.     if (flags & SWS_CPU_CAPS_MMX)

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

  956. #endif

  957. 

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

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

  960. 

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

  962.     {

  963.         int i;

  964.         filterSize= 1;

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

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

  967. 

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

  969.         {

  970.             filter[i*filterSize]=1;

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

  972.         }

  973. 

  974.     }

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

  976.     {

  977.         int i;

  978.         int xDstInSrc;

  979.         filterSize= 1;

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

  981. 

  982.         xDstInSrc= xInc/2 - 0x8000;

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

  984.         {

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

  986. 

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

  988.             filter[i]= 1.0;

  989.             xDstInSrc+= xInc;

  990.         }

  991.     }

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

  993.     {

  994.         int i;

  995.         int xDstInSrc;

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

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

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

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

  1000. 

  1001.         xDstInSrc= xInc/2 - 0x8000;

  1002.         for (i=0; i<dstW; i++)

  1003.         {

  1004.             int xx= (xDstInSrc - ((filterSize-1)<<15) + (1<<15))>>16;

  1005.             int j;

  1006. 

  1007.             (*filterPos)[i]= xx;

  1008.                 //Bilinear upscale / linear interpolate / Area averaging

  1009.                 for (j=0; j<filterSize; j++)

  1010.                 {

  1011.                     double d= FFABS((xx<<16) - xDstInSrc)/(double)(1<<16);

  1012.                     double coeff= 1.0 - d;

  1013.                     if (coeff<0) coeff=0;

  1014.                     filter[i*filterSize + j]= coeff;

  1015.                     xx++;

  1016.                 }

  1017.             xDstInSrc+= xInc;

  1018.         }

  1019.     }

  1020.     else

  1021.     {

  1022.         double xDstInSrc;

  1023.         double sizeFactor, filterSizeInSrc;

  1024.         const double xInc1= (double)xInc / (double)(1<<16);

  1025. 

  1026.         if      (flags&SWS_BICUBIC)      sizeFactor=  4.0;

  1027.         else if (flags&SWS_X)            sizeFactor=  8.0;

  1028.         else if (flags&SWS_AREA)         sizeFactor=  1.0; //downscale only, for upscale it is bilinear

  1029.         else if (flags&SWS_GAUSS)        sizeFactor=  8.0;   // infinite ;)

  1030.         else if (flags&SWS_LANCZOS)      sizeFactor= param[0] != SWS_PARAM_DEFAULT ? 2.0*param[0] : 6.0;

  1031.         else if (flags&SWS_SINC)         sizeFactor= 20.0; // infinite ;)

  1032.         else if (flags&SWS_SPLINE)       sizeFactor= 20.0;  // infinite ;)

  1033.         else if (flags&SWS_BILINEAR)     sizeFactor=  2.0;

  1034.         else {

  1035.             sizeFactor= 0.0; //GCC warning killer

  1036.             assert(0);

  1037.         }

  1038. 

  1039.         if (xInc1 <= 1.0)       filterSizeInSrc= sizeFactor; // upscale

  1040.         else                    filterSizeInSrc= sizeFactor*srcW / (double)dstW;

  1041. 

  1042.         filterSize= (int)ceil(1 + filterSizeInSrc); // will be reduced later if possible

  1043.         if (filterSize > srcW-2) filterSize=srcW-2;

  1044. 

  1045.         filter= av_malloc(dstW*sizeof(double)*filterSize);

  1046. 

  1047.         xDstInSrc= xInc1 / 2.0 - 0.5;

  1048.         for (i=0; i<dstW; i++)

  1049.         {

  1050.             int xx= (int)(xDstInSrc - (filterSize-1)*0.5 + 0.5);

  1051.             int j;

  1052.             (*filterPos)[i]= xx;

  1053.             for (j=0; j<filterSize; j++)

  1054.             {

  1055.                 double d= FFABS(xx - xDstInSrc)/filterSizeInSrc*sizeFactor;

  1056.                 double coeff;

  1057.                 if (flags & SWS_BICUBIC)

  1058.                 {

  1059.                     double B= param[0] != SWS_PARAM_DEFAULT ? param[0] : 0.0;

  1060.                     double C= param[1] != SWS_PARAM_DEFAULT ? param[1] : 0.6;

  1061. 

  1062.                     if (d<1.0)

  1063.                         coeff = (12-9*B-6*C)*d*d*d + (-18+12*B+6*C)*d*d + 6-2*B;

  1064.                     else if (d<2.0)

  1065.                         coeff = (-B-6*C)*d*d*d + (6*B+30*C)*d*d + (-12*B-48*C)*d +8*B+24*C;

  1066.                     else

  1067.                         coeff=0.0;

  1068.                 }

  1069. /*                else if (flags & SWS_X)

  1070.                 {

  1071.                     double p= param ? param*0.01 : 0.3;

  1072.                     coeff = d ? sin(d*PI)/(d*PI) : 1.0;

  1073.                     coeff*= pow(2.0, - p*d*d);

  1074.                 }*/

  1075.                 else if (flags & SWS_X)

  1076.                 {

  1077.                     double A= param[0] != SWS_PARAM_DEFAULT ? param[0] : 1.0;

  1078. 

  1079.                     if (d<1.0)

  1080.                         coeff = cos(d*PI);

  1081.                     else

  1082.                         coeff=-1.0;

  1083.                     if (coeff<0.0)      coeff= -pow(-coeff, A);

  1084.                     else                coeff=  pow( coeff, A);

  1085.                     coeff= coeff*0.5 + 0.5;

  1086.                 }

  1087.                 else if (flags & SWS_AREA)

  1088.                 {

  1089.                     double srcPixelSize= 1.0/xInc1;

  1090.                     if      (d + srcPixelSize/2 < 0.5) coeff= 1.0;

  1091.                     else if (d - srcPixelSize/2 < 0.5) coeff= (0.5-d)/srcPixelSize + 0.5;

  1092.                     else coeff=0.0;

  1093.                 }

  1094.                 else if (flags & SWS_GAUSS)

  1095.                 {

  1096.                     double p= param[0] != SWS_PARAM_DEFAULT ? param[0] : 3.0;

  1097.                     coeff = pow(2.0, - p*d*d);

  1098.                 }

  1099.                 else if (flags & SWS_SINC)

  1100.                 {

  1101.                     coeff = d ? sin(d*PI)/(d*PI) : 1.0;

  1102.                 }

  1103.                 else if (flags & SWS_LANCZOS)

  1104.                 {

  1105.                     double p= param[0] != SWS_PARAM_DEFAULT ? param[0] : 3.0;

  1106.                     coeff = d ? sin(d*PI)*sin(d*PI/p)/(d*d*PI*PI/p) : 1.0;

  1107.                     if (d>p) coeff=0;

  1108.                 }

  1109.                 else if (flags & SWS_BILINEAR)

  1110.                 {

  1111.                     coeff= 1.0 - d;

  1112.                     if (coeff<0) coeff=0;

  1113.                 }

  1114.                 else if (flags & SWS_SPLINE)

  1115.                 {

  1116.                     double p=-2.196152422706632;

  1117.                     coeff = getSplineCoeff(1.0, 0.0, p, -p-1.0, d);

  1118.                 }

  1119.                 else {

  1120.                     coeff= 0.0; //GCC warning killer

  1121.                     assert(0);

  1122.                 }

  1123. 

  1124.                 filter[i*filterSize + j]= coeff;

  1125.                 xx++;

  1126.             }

  1127.             xDstInSrc+= xInc1;

  1128.         }

  1129.     }

  1130. 

  1131.     /* apply src & dst Filter to filter -> filter2

  1132.        av_free(filter);

  1133.     */

  1134.     assert(filterSize>0);

  1135.     filter2Size= filterSize;

  1136.     if (srcFilter) filter2Size+= srcFilter->length - 1;

  1137.     if (dstFilter) filter2Size+= dstFilter->length - 1;

  1138.     assert(filter2Size>0);

  1139.     filter2= av_malloc(filter2Size*dstW*sizeof(double));

  1140. 

  1141.     for (i=0; i<dstW; i++)

  1142.     {

  1143.         int j;

  1144.         SwsVector scaleFilter;

  1145.         SwsVector *outVec;

  1146. 

  1147.         scaleFilter.coeff= filter + i*filterSize;

  1148.         scaleFilter.length= filterSize;

  1149. 

  1150.         if (srcFilter) outVec= sws_getConvVec(srcFilter, &scaleFilter);

  1151.         else           outVec= &scaleFilter;

  1152. 

  1153.         assert(outVec->length == filter2Size);

  1154.         //FIXME dstFilter

  1155. 

  1156.         for (j=0; j<outVec->length; j++)

  1157.         {

  1158.             filter2[i*filter2Size + j]= outVec->coeff[j];

  1159.         }

  1160. 

  1161.         (*filterPos)[i]+= (filterSize-1)/2 - (filter2Size-1)/2;

  1162. 

  1163.         if (outVec != &scaleFilter) sws_freeVec(outVec);

  1164.     }

  1165.     av_freep(&filter);

  1166. 

  1167.     /* try to reduce the filter-size (step1 find size and shift left) */

  1168.     // Assume it is near normalized (*0.5 or *2.0 is OK but * 0.001 is not).

  1169.     minFilterSize= 0;

  1170.     for (i=dstW-1; i>=0; i--)

  1171.     {

  1172.         int min= filter2Size;

  1173.         int j;

  1174.         double cutOff=0.0;

  1175. 

  1176.         /* get rid off near zero elements on the left by shifting left */

  1177.         for (j=0; j<filter2Size; j++)

  1178.         {

  1179.             int k;

  1180.             cutOff += FFABS(filter2[i*filter2Size]);

  1181. 

  1182.             if (cutOff > SWS_MAX_REDUCE_CUTOFF) break;

  1183. 

  1184.             /* preserve monotonicity because the core can't handle the filter otherwise */

  1185.             if (i<dstW-1 && (*filterPos)[i] >= (*filterPos)[i+1]) break;

  1186. 

  1187.             // Move filter coeffs left

  1188.             for (k=1; k<filter2Size; k++)

  1189.                 filter2[i*filter2Size + k - 1]= filter2[i*filter2Size + k];

  1190.             filter2[i*filter2Size + k - 1]= 0.0;

  1191.             (*filterPos)[i]++;

  1192.         }

  1193. 

  1194.         cutOff=0.0;

  1195.         /* count near zeros on the right */

  1196.         for (j=filter2Size-1; j>0; j--)

  1197.         {

  1198.             cutOff += FFABS(filter2[i*filter2Size + j]);

  1199. 

  1200.             if (cutOff > SWS_MAX_REDUCE_CUTOFF) break;

  1201.             min--;

  1202.         }

  1203. 

  1204.         if (min>minFilterSize) minFilterSize= min;

  1205.     }

  1206. 

  1207.     if (flags & SWS_CPU_CAPS_ALTIVEC) {

  1208.         // we can handle the special case 4,

  1209.         // so we don't want to go to the full 8

  1210.         if (minFilterSize < 5)

  1211.             filterAlign = 4;

  1212. 

  1213.         // we really don't want to waste our time

  1214.         // doing useless computation, so fall-back on

  1215.         // the scalar C code for very small filter.

  1216.         // vectorizing is worth it only if you have

  1217.         // decent-sized vector.

  1218.         if (minFilterSize < 3)

  1219.             filterAlign = 1;

  1220.     }

  1221. 

  1222.     if (flags & SWS_CPU_CAPS_MMX) {

  1223.         // special case for unscaled vertical filtering

  1224.         if (minFilterSize == 1 && filterAlign == 2)

  1225.             filterAlign= 1;

  1226.     }

  1227. 

  1228.     assert(minFilterSize > 0);

  1229.     filterSize= (minFilterSize +(filterAlign-1)) & (~(filterAlign-1));

  1230.     assert(filterSize > 0);

  1231.     filter= av_malloc(filterSize*dstW*sizeof(double));

  1232.     if (filterSize >= MAX_FILTER_SIZE*16/((flags&SWS_ACCURATE_RND) ? APCK_SIZE : 16) || !filter)

  1233.         goto error;

  1234.     *outFilterSize= filterSize;

  1235. 

  1236.     if (flags&SWS_PRINT_INFO)

  1237.         av_log(NULL, AV_LOG_VERBOSE, "SwScaler: reducing / aligning filtersize %d -> %d\n", filter2Size, filterSize);

  1238.     /* try to reduce the filter-size (step2 reduce it) */

  1239.     for (i=0; i<dstW; i++)

  1240.     {

  1241.         int j;

  1242. 

  1243.         for (j=0; j<filterSize; j++)

  1244.         {

  1245.             if (j>=filter2Size) filter[i*filterSize + j]= 0.0;

  1246.             else               filter[i*filterSize + j]= filter2[i*filter2Size + j];

  1247.             if((flags & SWS_BITEXACT) && j>=minFilterSize)

  1248.                 filter[i*filterSize + j]= 0.0;

  1249.         }

  1250.     }

  1251. 

  1252. 

  1253.     //FIXME try to align filterpos if possible

  1254. 

  1255.     //fix borders

  1256.     for (i=0; i<dstW; i++)

  1257.     {

  1258.         int j;

  1259.         if ((*filterPos)[i] < 0)

  1260.         {

  1261.             // Move filter coeffs left to compensate for filterPos

  1262.             for (j=1; j<filterSize; j++)

  1263.             {

  1264.                 int left= FFMAX(j + (*filterPos)[i], 0);

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

  1266.                 filter[i*filterSize + j]=0;

  1267.             }

  1268.             (*filterPos)[i]= 0;

  1269.         }

  1270. 

  1271.         if ((*filterPos)[i] + filterSize > srcW)

  1272.         {

  1273.             int shift= (*filterPos)[i] + filterSize - srcW;

  1274.             // Move filter coeffs right to compensate for filterPos

  1275.             for (j=filterSize-2; j>=0; j--)

  1276.             {

  1277.                 int right= FFMIN(j + shift, filterSize-1);

  1278.                 filter[i*filterSize +right] += filter[i*filterSize +j];

  1279.                 filter[i*filterSize +j]=0;

  1280.             }

  1281.             (*filterPos)[i]= srcW - filterSize;

  1282.         }

  1283.     }

  1284. 

  1285.     // Note the +1 is for the MMXscaler which reads over the end

  1286.     /* align at 16 for AltiVec (needed by hScale_altivec_real) */

  1287.     *outFilter= av_mallocz(*outFilterSize*(dstW+1)*sizeof(int16_t));

  1288. 

  1289.     /* Normalize & Store in outFilter */

  1290.     for (i=0; i<dstW; i++)

  1291.     {

  1292.         int j;

  1293.         double error=0;

  1294.         double sum=0;

  1295.         double scale= one;

  1296. 

  1297.         for (j=0; j<filterSize; j++)

  1298.         {

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

  1300.         }

  1301.         scale/= sum;

  1302.         for (j=0; j<*outFilterSize; j++)

  1303.         {

  1304.             double v= filter[i*filterSize + j]*scale + error;

  1305.             int intV= floor(v + 0.5);

  1306.             (*outFilter)[i*(*outFilterSize) + j]= intV;

  1307.             error = v - intV;

  1308.         }

  1309.     }

  1310. 

  1311.     (*filterPos)[dstW]= (*filterPos)[dstW-1]; // the MMX scaler will read over the end

  1312.     for (i=0; i<*outFilterSize; i++)

  1313.     {

  1314.         int j= dstW*(*outFilterSize);

  1315.         (*outFilter)[j + i]= (*outFilter)[j + i - (*outFilterSize)];

  1316.     }

  1317. 

  1318.     ret=0;

  1319. error:

  1320.     av_free(filter);

  1321.     av_free(filter2);

  1322.     return ret;

  1323. }

  1324. 

  1325. #ifdef COMPILE_MMX2

  1326. static void initMMX2HScaler(int dstW, int xInc, uint8_t *funnyCode, int16_t *filter, int32_t *filterPos, int numSplits)

  1327. {

  1328.     uint8_t *fragmentA;

  1329.     long imm8OfPShufW1A;

  1330.     long imm8OfPShufW2A;

  1331.     long fragmentLengthA;

  1332.     uint8_t *fragmentB;

  1333.     long imm8OfPShufW1B;

  1334.     long imm8OfPShufW2B;

  1335.     long fragmentLengthB;

  1336.     int fragmentPos;

  1337. 

  1338.     int xpos, i;

  1339. 

  1340.     // create an optimized horizontal scaling routine

  1341. 

  1342.     //code fragment

  1343. 

  1344.     asm volatile(

  1345.         "jmp                         9f                 \n\t"

  1346.     // Begin

  1347.         "0:                                             \n\t"

  1348.         "movq    (%%"REG_d", %%"REG_a"), %%mm3          \n\t"

  1349.         "movd    (%%"REG_c", %%"REG_S"), %%mm0          \n\t"

  1350.         "movd   1(%%"REG_c", %%"REG_S"), %%mm1          \n\t"

  1351.         "punpcklbw                %%mm7, %%mm1          \n\t"

  1352.         "punpcklbw                %%mm7, %%mm0          \n\t"

  1353.         "pshufw                   $0xFF, %%mm1, %%mm1   \n\t"

  1354.         "1:                                             \n\t"

  1355.         "pshufw                   $0xFF, %%mm0, %%mm0   \n\t"

  1356.         "2:                                             \n\t"

  1357.         "psubw                    %%mm1, %%mm0          \n\t"

  1358.         "movl   8(%%"REG_b", %%"REG_a"), %%esi          \n\t"

  1359.         "pmullw                   %%mm3, %%mm0          \n\t"

  1360.         "psllw                       $7, %%mm1          \n\t"

  1361.         "paddw                    %%mm1, %%mm0          \n\t"

  1362. 

  1363.         "movq                     %%mm0, (%%"REG_D", %%"REG_a") \n\t"

  1364. 

  1365.         "add                         $8, %%"REG_a"      \n\t"

  1366.     // End

  1367.         "9:                                             \n\t"

  1368. //        "int $3                                         \n\t"

  1369.         "lea                 " LOCAL_MANGLE(0b) ", %0   \n\t"

  1370.         "lea                 " LOCAL_MANGLE(1b) ", %1   \n\t"

  1371.         "lea                 " LOCAL_MANGLE(2b) ", %2   \n\t"

  1372.         "dec                         %1                 \n\t"

  1373.         "dec                         %2                 \n\t"

  1374.         "sub                         %0, %1             \n\t"

  1375.         "sub                         %0, %2             \n\t"

  1376.         "lea                 " LOCAL_MANGLE(9b) ", %3   \n\t"

  1377.         "sub                         %0, %3             \n\t"

  1378. 

  1379. 

  1380.         :"=r" (fragmentA), "=r" (imm8OfPShufW1A), "=r" (imm8OfPShufW2A),

  1381.         "=r" (fragmentLengthA)

  1382.     );

  1383. 

  1384.     asm volatile(

  1385.         "jmp                         9f                 \n\t"

  1386.     // Begin

  1387.         "0:                                             \n\t"

  1388.         "movq    (%%"REG_d", %%"REG_a"), %%mm3          \n\t"

  1389.         "movd    (%%"REG_c", %%"REG_S"), %%mm0          \n\t"

  1390.         "punpcklbw                %%mm7, %%mm0          \n\t"

  1391.         "pshufw                   $0xFF, %%mm0, %%mm1   \n\t"

  1392.         "1:                                             \n\t"

  1393.         "pshufw                   $0xFF, %%mm0, %%mm0   \n\t"

  1394.         "2:                                             \n\t"

  1395.         "psubw                    %%mm1, %%mm0          \n\t"

  1396.         "movl   8(%%"REG_b", %%"REG_a"), %%esi          \n\t"

  1397.         "pmullw                   %%mm3, %%mm0          \n\t"

  1398.         "psllw                       $7, %%mm1          \n\t"

  1399.         "paddw                    %%mm1, %%mm0          \n\t"

  1400. 

  1401.         "movq                     %%mm0, (%%"REG_D", %%"REG_a") \n\t"

  1402. 

  1403.         "add                         $8, %%"REG_a"      \n\t"

  1404.     // End

  1405.         "9:                                             \n\t"

  1406. //        "int                       $3                   \n\t"

  1407.         "lea                 " LOCAL_MANGLE(0b) ", %0   \n\t"

  1408.         "lea                 " LOCAL_MANGLE(1b) ", %1   \n\t"

  1409.         "lea                 " LOCAL_MANGLE(2b) ", %2   \n\t"

  1410.         "dec                         %1                 \n\t"

  1411.         "dec                         %2                 \n\t"

  1412.         "sub                         %0, %1             \n\t"

  1413.         "sub                         %0, %2             \n\t"

  1414.         "lea                 " LOCAL_MANGLE(9b) ", %3   \n\t"

  1415.         "sub                         %0, %3             \n\t"

  1416. 

  1417. 

  1418.         :"=r" (fragmentB), "=r" (imm8OfPShufW1B), "=r" (imm8OfPShufW2B),

  1419.         "=r" (fragmentLengthB)

  1420.     );

  1421. 

  1422.     xpos= 0; //lumXInc/2 - 0x8000; // difference between pixel centers

  1423.     fragmentPos=0;

  1424. 

  1425.     for (i=0; i<dstW/numSplits; i++)

  1426.     {

  1427.         int xx=xpos>>16;

  1428. 

  1429.         if ((i&3) == 0)

  1430.         {

  1431.             int a=0;

  1432.             int b=((xpos+xInc)>>16) - xx;

  1433.             int c=((xpos+xInc*2)>>16) - xx;

  1434.             int d=((xpos+xInc*3)>>16) - xx;

  1435. 

  1436.             filter[i  ] = (( xpos         & 0xFFFF) ^ 0xFFFF)>>9;

  1437.             filter[i+1] = (((xpos+xInc  ) & 0xFFFF) ^ 0xFFFF)>>9;

  1438.             filter[i+2] = (((xpos+xInc*2) & 0xFFFF) ^ 0xFFFF)>>9;

  1439.             filter[i+3] = (((xpos+xInc*3) & 0xFFFF) ^ 0xFFFF)>>9;

  1440.             filterPos[i/2]= xx;

  1441. 

  1442.             if (d+1<4)

  1443.             {

  1444.                 int maxShift= 3-(d+1);

  1445.                 int shift=0;

  1446. 

  1447.                 memcpy(funnyCode + fragmentPos, fragmentB, fragmentLengthB);

  1448. 

  1449.                 funnyCode[fragmentPos + imm8OfPShufW1B]=

  1450.                     (a+1) | ((b+1)<<2) | ((c+1)<<4) | ((d+1)<<6);

  1451.                 funnyCode[fragmentPos + imm8OfPShufW2B]=

  1452.                     a | (b<<2) | (c<<4) | (d<<6);

  1453. 

  1454.                 if (i+3>=dstW) shift=maxShift; //avoid overread

  1455.                 else if ((filterPos[i/2]&3) <= maxShift) shift=filterPos[i/2]&3; //Align

  1456. 

  1457.                 if (shift && i>=shift)

  1458.                 {

  1459.                     funnyCode[fragmentPos + imm8OfPShufW1B]+= 0x55*shift;

  1460.                     funnyCode[fragmentPos + imm8OfPShufW2B]+= 0x55*shift;

  1461.                     filterPos[i/2]-=shift;

  1462.                 }

  1463. 

  1464.                 fragmentPos+= fragmentLengthB;

  1465.             }

  1466.             else

  1467.             {

  1468.                 int maxShift= 3-d;

  1469.                 int shift=0;

  1470. 

  1471.                 memcpy(funnyCode + fragmentPos, fragmentA, fragmentLengthA);

  1472. 

  1473.                 funnyCode[fragmentPos + imm8OfPShufW1A]=

  1474.                 funnyCode[fragmentPos + imm8OfPShufW2A]=

  1475.                     a | (b<<2) | (c<<4) | (d<<6);

  1476. 

  1477.                 if (i+4>=dstW) shift=maxShift; //avoid overread

  1478.                 else if ((filterPos[i/2]&3) <= maxShift) shift=filterPos[i/2]&3; //partial align

  1479. 

  1480.                 if (shift && i>=shift)

  1481.                 {

  1482.                     funnyCode[fragmentPos + imm8OfPShufW1A]+= 0x55*shift;

  1483.                     funnyCode[fragmentPos + imm8OfPShufW2A]+= 0x55*shift;

  1484.                     filterPos[i/2]-=shift;

  1485.                 }

  1486. 

  1487.                 fragmentPos+= fragmentLengthA;

  1488.             }

  1489. 

  1490.             funnyCode[fragmentPos]= RET;

  1491.         }

  1492.         xpos+=xInc;

  1493.     }

  1494.     filterPos[i/2]= xpos>>16; // needed to jump to the next part

  1495. }

  1496. #endif /* COMPILE_MMX2 */

  1497. 

  1498. static void globalInit(void){

  1499.     // generating tables:

  1500.     int i;

  1501.     for (i=0; i<768; i++){

  1502.         int c= av_clip_uint8(i-256);

  1503.         clip_table[i]=c;

  1504.     }

  1505. }

  1506. 

  1507. static SwsFunc getSwsFunc(int flags){

  1508. 

  1509. #if defined(RUNTIME_CPUDETECT) && defined (CONFIG_GPL)

  1510. #if defined(ARCH_X86)

  1511.     // ordered per speed fastest first

  1512.     if (flags & SWS_CPU_CAPS_MMX2)

  1513.         return swScale_MMX2;

  1514.     else if (flags & SWS_CPU_CAPS_3DNOW)

  1515.         return swScale_3DNow;

  1516.     else if (flags & SWS_CPU_CAPS_MMX)

  1517.         return swScale_MMX;

  1518.     else

  1519.         return swScale_C;

  1520. 

  1521. #else

  1522. #ifdef ARCH_POWERPC

  1523.     if (flags & SWS_CPU_CAPS_ALTIVEC)

  1524.         return swScale_altivec;

  1525.     else

  1526.         return swScale_C;

  1527. #endif

  1528.     return swScale_C;

  1529. #endif /* defined(ARCH_X86) */

  1530. #else //RUNTIME_CPUDETECT

  1531. #ifdef HAVE_MMX2

  1532.     return swScale_MMX2;

  1533. #elif defined (HAVE_3DNOW)

  1534.     return swScale_3DNow;

  1535. #elif defined (HAVE_MMX)

  1536.     return swScale_MMX;

  1537. #elif defined (HAVE_ALTIVEC)

  1538.     return swScale_altivec;

  1539. #else

  1540.     return swScale_C;

  1541. #endif

  1542. #endif //!RUNTIME_CPUDETECT

  1543. }

  1544. 

  1545. static int PlanarToNV12Wrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1546.                                int srcSliceH, uint8_t* dstParam[], int dstStride[]){

  1547.     uint8_t *dst=dstParam[0] + dstStride[0]*srcSliceY;

  1548.     /* Copy Y plane */

  1549.     if (dstStride[0]==srcStride[0] && srcStride[0] > 0)

  1550.         memcpy(dst, src[0], srcSliceH*dstStride[0]);

  1551.     else

  1552.     {

  1553.         int i;

  1554.         uint8_t *srcPtr= src[0];

  1555.         uint8_t *dstPtr= dst;

  1556.         for (i=0; i<srcSliceH; i++)

  1557.         {

  1558.             memcpy(dstPtr, srcPtr, c->srcW);

  1559.             srcPtr+= srcStride[0];

  1560.             dstPtr+= dstStride[0];

  1561.         }

  1562.     }

  1563.     dst = dstParam[1] + dstStride[1]*srcSliceY/2;

  1564.     if (c->dstFormat == PIX_FMT_NV12)

  1565.         interleaveBytes(src[1], src[2], dst, c->srcW/2, srcSliceH/2, srcStride[1], srcStride[2], dstStride[0]);

  1566.     else

  1567.         interleaveBytes(src[2], src[1], dst, c->srcW/2, srcSliceH/2, srcStride[2], srcStride[1], dstStride[0]);

  1568. 

  1569.     return srcSliceH;

  1570. }

  1571. 

  1572. static int PlanarToYuy2Wrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

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

  1574.     uint8_t *dst=dstParam[0] + dstStride[0]*srcSliceY;

  1575. 

  1576.     yv12toyuy2(src[0], src[1], src[2], dst, c->srcW, srcSliceH, srcStride[0], srcStride[1], dstStride[0]);

  1577. 

  1578.     return srcSliceH;

  1579. }

  1580. 

  1581. static int PlanarToUyvyWrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1582.                                int srcSliceH, uint8_t* dstParam[], int dstStride[]){

  1583.     uint8_t *dst=dstParam[0] + dstStride[0]*srcSliceY;

  1584. 

  1585.     yv12touyvy(src[0], src[1], src[2], dst, c->srcW, srcSliceH, srcStride[0], srcStride[1], dstStride[0]);

  1586. 

  1587.     return srcSliceH;

  1588. }

  1589. 

  1590. static int YUV422PToYuy2Wrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1591.                                 int srcSliceH, uint8_t* dstParam[], int dstStride[]){

  1592.     uint8_t *dst=dstParam[0] + dstStride[0]*srcSliceY;

  1593. 

  1594.     yuv422ptoyuy2(src[0],src[1],src[2],dst,c->srcW,srcSliceH,srcStride[0],srcStride[1],dstStride[0]);

  1595. 

  1596.     return srcSliceH;

  1597. }

  1598. 

  1599. static int YUV422PToUyvyWrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1600.                                 int srcSliceH, uint8_t* dstParam[], int dstStride[]){

  1601.     uint8_t *dst=dstParam[0] + dstStride[0]*srcSliceY;

  1602. 

  1603.     yuv422ptouyvy(src[0],src[1],src[2],dst,c->srcW,srcSliceH,srcStride[0],srcStride[1],dstStride[0]);

  1604. 

  1605.     return srcSliceH;

  1606. }

  1607. 

  1608. /* {RGB,BGR}{15,16,24,32,32_1} -> {RGB,BGR}{15,16,24,32} */

  1609. static int rgb2rgbWrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1610.                           int srcSliceH, uint8_t* dst[], int dstStride[]){

  1611.     const int srcFormat= c->srcFormat;

  1612.     const int dstFormat= c->dstFormat;

  1613.     const int srcBpp= (fmt_depth(srcFormat) + 7) >> 3;

  1614.     const int dstBpp= (fmt_depth(dstFormat) + 7) >> 3;

  1615.     const int srcId= fmt_depth(srcFormat) >> 2; /* 1:0, 4:1, 8:2, 15:3, 16:4, 24:6, 32:8 */

  1616.     const int dstId= fmt_depth(dstFormat) >> 2;

  1617.     void (*conv)(const uint8_t *src, uint8_t *dst, long src_size)=NULL;

  1618. 

  1619.     /* BGR -> BGR */

  1620.     if (  (isBGR(srcFormat) && isBGR(dstFormat))

  1621.        || (isRGB(srcFormat) && isRGB(dstFormat))){

  1622.         switch(srcId | (dstId<<4)){

  1623.         case 0x34: conv= rgb16to15; break;

  1624.         case 0x36: conv= rgb24to15; break;

  1625.         case 0x38: conv= rgb32to15; break;

  1626.         case 0x43: conv= rgb15to16; break;

  1627.         case 0x46: conv= rgb24to16; break;

  1628.         case 0x48: conv= rgb32to16; break;

  1629.         case 0x63: conv= rgb15to24; break;

  1630.         case 0x64: conv= rgb16to24; break;

  1631.         case 0x68: conv= rgb32to24; break;

  1632.         case 0x83: conv= rgb15to32; break;

  1633.         case 0x84: conv= rgb16to32; break;

  1634.         case 0x86: conv= rgb24to32; break;

  1635.         default: av_log(c, AV_LOG_ERROR, "internal error %s -> %s converter\n",

  1636.                         sws_format_name(srcFormat), sws_format_name(dstFormat)); break;

  1637.         }

  1638.     }else if (  (isBGR(srcFormat) && isRGB(dstFormat))

  1639.              || (isRGB(srcFormat) && isBGR(dstFormat))){

  1640.         switch(srcId | (dstId<<4)){

  1641.         case 0x33: conv= rgb15tobgr15; break;

  1642.         case 0x34: conv= rgb16tobgr15; break;

  1643.         case 0x36: conv= rgb24tobgr15; break;

  1644.         case 0x38: conv= rgb32tobgr15; break;

  1645.         case 0x43: conv= rgb15tobgr16; break;

  1646.         case 0x44: conv= rgb16tobgr16; break;

  1647.         case 0x46: conv= rgb24tobgr16; break;

  1648.         case 0x48: conv= rgb32tobgr16; break;

  1649.         case 0x63: conv= rgb15tobgr24; break;

  1650.         case 0x64: conv= rgb16tobgr24; break;

  1651.         case 0x66: conv= rgb24tobgr24; break;

  1652.         case 0x68: conv= rgb32tobgr24; break;

  1653.         case 0x83: conv= rgb15tobgr32; break;

  1654.         case 0x84: conv= rgb16tobgr32; break;

  1655.         case 0x86: conv= rgb24tobgr32; break;

  1656.         case 0x88: conv= rgb32tobgr32; break;

  1657.         default: av_log(c, AV_LOG_ERROR, "internal error %s -> %s converter\n",

  1658.                         sws_format_name(srcFormat), sws_format_name(dstFormat)); break;

  1659.         }

  1660.     }else{

  1661.         av_log(c, AV_LOG_ERROR, "internal error %s -> %s converter\n",

  1662.                sws_format_name(srcFormat), sws_format_name(dstFormat));

  1663.     }

  1664. 

  1665.     if(conv)

  1666.     {

  1667.         uint8_t *srcPtr= src[0];

  1668.         if(srcFormat == PIX_FMT_RGB32_1 || srcFormat == PIX_FMT_BGR32_1)

  1669.             srcPtr += ALT32_CORR;

  1670. 

  1671.         if (dstStride[0]*srcBpp == srcStride[0]*dstBpp && srcStride[0] > 0)

  1672.             conv(srcPtr, dst[0] + dstStride[0]*srcSliceY, srcSliceH*srcStride[0]);

  1673.         else

  1674.         {

  1675.             int i;

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

  1677. 

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

  1679.             {

  1680.                 conv(srcPtr, dstPtr, c->srcW*srcBpp);

  1681.                 srcPtr+= srcStride[0];

  1682.                 dstPtr+= dstStride[0];

  1683.             }

  1684.         }

  1685.     }

  1686.     return srcSliceH;

  1687. }

  1688. 

  1689. static int bgr24toyv12Wrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1690.                               int srcSliceH, uint8_t* dst[], int dstStride[]){

  1691. 

  1692.     rgb24toyv12(

  1693.         src[0],

  1694.         dst[0]+ srcSliceY    *dstStride[0],

  1695.         dst[1]+(srcSliceY>>1)*dstStride[1],

  1696.         dst[2]+(srcSliceY>>1)*dstStride[2],

  1697.         c->srcW, srcSliceH,

  1698.         dstStride[0], dstStride[1], srcStride[0]);

  1699.     return srcSliceH;

  1700. }

  1701. 

  1702. static int yvu9toyv12Wrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1703.                              int srcSliceH, uint8_t* dst[], int dstStride[]){

  1704.     int i;

  1705. 

  1706.     /* copy Y */

  1707.     if (srcStride[0]==dstStride[0] && srcStride[0] > 0)

  1708.         memcpy(dst[0]+ srcSliceY*dstStride[0], src[0], srcStride[0]*srcSliceH);

  1709.     else{

  1710.         uint8_t *srcPtr= src[0];

  1711.         uint8_t *dstPtr= dst[0] + dstStride[0]*srcSliceY;

  1712. 

  1713.         for (i=0; i<srcSliceH; i++)

  1714.         {

  1715.             memcpy(dstPtr, srcPtr, c->srcW);

  1716.             srcPtr+= srcStride[0];

  1717.             dstPtr+= dstStride[0];

  1718.         }

  1719.     }

  1720. 

  1721.     if (c->dstFormat==PIX_FMT_YUV420P){

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

  1723.         planar2x(src[2], dst[2], c->chrSrcW, c->chrSrcH, srcStride[2], dstStride[2]);

  1724.     }else{

  1725.         planar2x(src[1], dst[2], c->chrSrcW, c->chrSrcH, srcStride[1], dstStride[2]);

  1726.         planar2x(src[2], dst[1], c->chrSrcW, c->chrSrcH, srcStride[2], dstStride[1]);

  1727.     }

  1728.     return srcSliceH;

  1729. }

  1730. 

  1731. /* unscaled copy like stuff (assumes nearly identical formats) */

  1732. static int packedCopy(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1733.                       int srcSliceH, uint8_t* dst[], int dstStride[])

  1734. {

  1735.     if (dstStride[0]==srcStride[0] && srcStride[0] > 0)

  1736.         memcpy(dst[0] + dstStride[0]*srcSliceY, src[0], srcSliceH*dstStride[0]);

  1737.     else

  1738.     {

  1739.         int i;

  1740.         uint8_t *srcPtr= src[0];

  1741.         uint8_t *dstPtr= dst[0] + dstStride[0]*srcSliceY;

  1742.         int length=0;

  1743. 

  1744.         /* universal length finder */

  1745.         while(length+c->srcW <= FFABS(dstStride[0])

  1746.            && length+c->srcW <= FFABS(srcStride[0])) length+= c->srcW;

  1747.         assert(length!=0);

  1748. 

  1749.         for (i=0; i<srcSliceH; i++)

  1750.         {

  1751.             memcpy(dstPtr, srcPtr, length);

  1752.             srcPtr+= srcStride[0];

  1753.             dstPtr+= dstStride[0];

  1754.         }

  1755.     }

  1756.     return srcSliceH;

  1757. }

  1758. 

  1759. static int planarCopy(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1760.                       int srcSliceH, uint8_t* dst[], int dstStride[])

  1761. {

  1762.     int plane;

  1763.     for (plane=0; plane<3; plane++)

  1764.     {

  1765.         int length= plane==0 ? c->srcW  : -((-c->srcW  )>>c->chrDstHSubSample);

  1766.         int y=      plane==0 ? srcSliceY: -((-srcSliceY)>>c->chrDstVSubSample);

  1767.         int height= plane==0 ? srcSliceH: -((-srcSliceH)>>c->chrDstVSubSample);

  1768. 

  1769.         if ((isGray(c->srcFormat) || isGray(c->dstFormat)) && plane>0)

  1770.         {

  1771.             if (!isGray(c->dstFormat))

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

  1773.         }

  1774.         else

  1775.         {

  1776.             if (dstStride[plane]==srcStride[plane] && srcStride[plane] > 0)

  1777.                 memcpy(dst[plane] + dstStride[plane]*y, src[plane], height*dstStride[plane]);

  1778.             else

  1779.             {

  1780.                 int i;

  1781.                 uint8_t *srcPtr= src[plane];

  1782.                 uint8_t *dstPtr= dst[plane] + dstStride[plane]*y;

  1783.                 for (i=0; i<height; i++)

  1784.                 {

  1785.                     memcpy(dstPtr, srcPtr, length);

  1786.                     srcPtr+= srcStride[plane];

  1787.                     dstPtr+= dstStride[plane];

  1788.                 }

  1789.             }

  1790.         }

  1791.     }

  1792.     return srcSliceH;

  1793. }

  1794. 

  1795. static int gray16togray(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1796.                         int srcSliceH, uint8_t* dst[], int dstStride[]){

  1797. 

  1798.     int length= c->srcW;

  1799.     int y=      srcSliceY;

  1800.     int height= srcSliceH;

  1801.     int i, j;

  1802.     uint8_t *srcPtr= src[0];

  1803.     uint8_t *dstPtr= dst[0] + dstStride[0]*y;

  1804. 

  1805.     if (!isGray(c->dstFormat)){

  1806.         int height= -((-srcSliceH)>>c->chrDstVSubSample);

  1807.         memset(dst[1], 128, dstStride[1]*height);

  1808.         memset(dst[2], 128, dstStride[2]*height);

  1809.     }

  1810.     if (c->srcFormat == PIX_FMT_GRAY16LE) srcPtr++;

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

  1812.     {

  1813.         for (j=0; j<length; j++) dstPtr[j] = srcPtr[j<<1];

  1814.         srcPtr+= srcStride[0];

  1815.         dstPtr+= dstStride[0];

  1816.     }

  1817.     return srcSliceH;

  1818. }

  1819. 

  1820. static int graytogray16(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

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

  1822. 

  1823.     int length= c->srcW;

  1824.     int y=      srcSliceY;

  1825.     int height= srcSliceH;

  1826.     int i, j;

  1827.     uint8_t *srcPtr= src[0];

  1828.     uint8_t *dstPtr= dst[0] + dstStride[0]*y;

  1829.     for (i=0; i<height; i++)

  1830.     {

  1831.         for (j=0; j<length; j++)

  1832.         {

  1833.             dstPtr[j<<1] = srcPtr[j];

  1834.             dstPtr[(j<<1)+1] = srcPtr[j];

  1835.         }

  1836.         srcPtr+= srcStride[0];

  1837.         dstPtr+= dstStride[0];

  1838.     }

  1839.     return srcSliceH;

  1840. }

  1841. 

  1842. static int gray16swap(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  1843.                       int srcSliceH, uint8_t* dst[], int dstStride[]){

  1844. 

  1845.     int length= c->srcW;

  1846.     int y=      srcSliceY;

  1847.     int height= srcSliceH;

  1848.     int i, j;

  1849.     uint16_t *srcPtr= (uint16_t*)src[0];

  1850.     uint16_t *dstPtr= (uint16_t*)(dst[0] + dstStride[0]*y/2);

  1851.     for (i=0; i<height; i++)

  1852.     {

  1853.         for (j=0; j<length; j++) dstPtr[j] = bswap_16(srcPtr[j]);

  1854.         srcPtr+= srcStride[0]/2;

  1855.         dstPtr+= dstStride[0]/2;

  1856.     }

  1857.     return srcSliceH;

  1858. }

  1859. 

  1860. 

  1861. static void getSubSampleFactors(int *h, int *v, int format){

  1862.     switch(format){

  1863.     case PIX_FMT_UYVY422:

  1864.     case PIX_FMT_YUYV422:

  1865.         *h=1;

  1866.         *v=0;

  1867.         break;

  1868.     case PIX_FMT_YUV420P:

  1869.     case PIX_FMT_YUVA420P:

  1870.     case PIX_FMT_GRAY16BE:

  1871.     case PIX_FMT_GRAY16LE:

  1872.     case PIX_FMT_GRAY8: //FIXME remove after different subsamplings are fully implemented

  1873.     case PIX_FMT_NV12:

  1874.     case PIX_FMT_NV21:

  1875.         *h=1;

  1876.         *v=1;

  1877.         break;

  1878.     case PIX_FMT_YUV440P:

  1879.         *h=0;

  1880.         *v=1;

  1881.         break;

  1882.     case PIX_FMT_YUV410P:

  1883.         *h=2;

  1884.         *v=2;

  1885.         break;

  1886.     case PIX_FMT_YUV444P:

  1887.         *h=0;

  1888.         *v=0;

  1889.         break;

  1890.     case PIX_FMT_YUV422P:

  1891.         *h=1;

  1892.         *v=0;

  1893.         break;

  1894.     case PIX_FMT_YUV411P:

  1895.         *h=2;

  1896.         *v=0;

  1897.         break;

  1898.     default:

  1899.         *h=0;

  1900.         *v=0;

  1901.         break;

  1902.     }

  1903. }

  1904. 

  1905. static uint16_t roundToInt16(int64_t f){

  1906.     int r= (f + (1<<15))>>16;

  1907.          if (r<-0x7FFF) return 0x8000;

  1908.     else if (r> 0x7FFF) return 0x7FFF;

  1909.     else                return r;

  1910. }

  1911. 

  1912. /**

  1913.  * @param inv_table the yuv2rgb coeffs, normally Inverse_Table_6_9[x]

  1914.  * @param fullRange if 1 then the luma range is 0..255 if 0 it is 16..235

  1915.  * @return -1 if not supported

  1916.  */

  1917. int sws_setColorspaceDetails(SwsContext *c, const int inv_table[4], int srcRange, const int table[4], int dstRange, int brightness, int contrast, int saturation){

  1918.     int64_t crv =  inv_table[0];

  1919.     int64_t cbu =  inv_table[1];

  1920.     int64_t cgu = -inv_table[2];

  1921.     int64_t cgv = -inv_table[3];

  1922.     int64_t cy  = 1<<16;

  1923.     int64_t oy  = 0;

  1924. 

  1925.     memcpy(c->srcColorspaceTable, inv_table, sizeof(int)*4);

  1926.     memcpy(c->dstColorspaceTable,     table, sizeof(int)*4);

  1927. 

  1928.     c->brightness= brightness;

  1929.     c->contrast  = contrast;

  1930.     c->saturation= saturation;

  1931.     c->srcRange  = srcRange;

  1932.     c->dstRange  = dstRange;

  1933.     if (isYUV(c->dstFormat) || isGray(c->dstFormat)) return 0;

  1934. 

  1935.     c->uOffset=   0x0400040004000400LL;

  1936.     c->vOffset=   0x0400040004000400LL;

  1937. 

  1938.     if (!srcRange){

  1939.         cy= (cy*255) / 219;

  1940.         oy= 16<<16;

  1941.     }else{

  1942.         crv= (crv*224) / 255;

  1943.         cbu= (cbu*224) / 255;

  1944.         cgu= (cgu*224) / 255;

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

  1946.     }

  1947. 

  1948.     cy = (cy *contrast             )>>16;

  1949.     crv= (crv*contrast * saturation)>>32;

  1950.     cbu= (cbu*contrast * saturation)>>32;

  1951.     cgu= (cgu*contrast * saturation)>>32;

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

  1953. 

  1954.     oy -= 256*brightness;

  1955. 

  1956.     c->yCoeff=    roundToInt16(cy *8192) * 0x0001000100010001ULL;

  1957.     c->vrCoeff=   roundToInt16(crv*8192) * 0x0001000100010001ULL;

  1958.     c->ubCoeff=   roundToInt16(cbu*8192) * 0x0001000100010001ULL;

  1959.     c->vgCoeff=   roundToInt16(cgv*8192) * 0x0001000100010001ULL;

  1960.     c->ugCoeff=   roundToInt16(cgu*8192) * 0x0001000100010001ULL;

  1961.     c->yOffset=   roundToInt16(oy *   8) * 0x0001000100010001ULL;

  1962. 

  1963.     c->yuv2rgb_y_coeff  = (int16_t)roundToInt16(cy <<13);

  1964.     c->yuv2rgb_y_offset = (int16_t)roundToInt16(oy << 9);

  1965.     c->yuv2rgb_v2r_coeff= (int16_t)roundToInt16(crv<<13);

  1966.     c->yuv2rgb_v2g_coeff= (int16_t)roundToInt16(cgv<<13);

  1967.     c->yuv2rgb_u2g_coeff= (int16_t)roundToInt16(cgu<<13);

  1968.     c->yuv2rgb_u2b_coeff= (int16_t)roundToInt16(cbu<<13);

  1969. 

  1970.     yuv2rgb_c_init_tables(c, inv_table, srcRange, brightness, contrast, saturation);

  1971.     //FIXME factorize

  1972. 

  1973. #ifdef COMPILE_ALTIVEC

  1974.     if (c->flags & SWS_CPU_CAPS_ALTIVEC)

  1975.         yuv2rgb_altivec_init_tables (c, inv_table, brightness, contrast, saturation);

  1976. #endif

  1977.     return 0;

  1978. }

  1979. 

  1980. /**

  1981.  * @return -1 if not supported

  1982.  */

  1983. int sws_getColorspaceDetails(SwsContext *c, int **inv_table, int *srcRange, int **table, int *dstRange, int *brightness, int *contrast, int *saturation){

  1984.     if (isYUV(c->dstFormat) || isGray(c->dstFormat)) return -1;

  1985. 

  1986.     *inv_table = c->srcColorspaceTable;

  1987.     *table     = c->dstColorspaceTable;

  1988.     *srcRange  = c->srcRange;

  1989.     *dstRange  = c->dstRange;

  1990.     *brightness= c->brightness;

  1991.     *contrast  = c->contrast;

  1992.     *saturation= c->saturation;

  1993. 

  1994.     return 0;

  1995. }

  1996. 

  1997. static int handle_jpeg(int *format)

  1998. {

  1999.     switch (*format) {

  2000.         case PIX_FMT_YUVJ420P:

  2001.             *format = PIX_FMT_YUV420P;

  2002.             return 1;

  2003.         case PIX_FMT_YUVJ422P:

  2004.             *format = PIX_FMT_YUV422P;

  2005.             return 1;

  2006.         case PIX_FMT_YUVJ444P:

  2007.             *format = PIX_FMT_YUV444P;

  2008.             return 1;

  2009.         case PIX_FMT_YUVJ440P:

  2010.             *format = PIX_FMT_YUV440P;

  2011.             return 1;

  2012.         default:

  2013.             return 0;

  2014.     }

  2015. }

  2016. 

  2017. SwsContext *sws_getContext(int srcW, int srcH, int srcFormat, int dstW, int dstH, int dstFormat, int flags,

  2018.                            SwsFilter *srcFilter, SwsFilter *dstFilter, double *param){

  2019. 

  2020.     SwsContext *c;

  2021.     int i;

  2022.     int usesVFilter, usesHFilter;

  2023.     int unscaled, needsDither;

  2024.     int srcRange, dstRange;

  2025.     SwsFilter dummyFilter= {NULL, NULL, NULL, NULL};

  2026. #if defined(ARCH_X86)

  2027.     if (flags & SWS_CPU_CAPS_MMX)

  2028.         asm volatile("emms\n\t"::: "memory");

  2029. #endif

  2030. 

  2031. #if !defined(RUNTIME_CPUDETECT) || !defined (CONFIG_GPL) //ensure that the flags match the compiled variant if cpudetect is off

  2032.     flags &= ~(SWS_CPU_CAPS_MMX|SWS_CPU_CAPS_MMX2|SWS_CPU_CAPS_3DNOW|SWS_CPU_CAPS_ALTIVEC|SWS_CPU_CAPS_BFIN);

  2033. #ifdef HAVE_MMX2

  2034.     flags |= SWS_CPU_CAPS_MMX|SWS_CPU_CAPS_MMX2;

  2035. #elif defined (HAVE_3DNOW)

  2036.     flags |= SWS_CPU_CAPS_MMX|SWS_CPU_CAPS_3DNOW;

  2037. #elif defined (HAVE_MMX)

  2038.     flags |= SWS_CPU_CAPS_MMX;

  2039. #elif defined (HAVE_ALTIVEC)

  2040.     flags |= SWS_CPU_CAPS_ALTIVEC;

  2041. #elif defined (ARCH_BFIN)

  2042.     flags |= SWS_CPU_CAPS_BFIN;

  2043. #endif

  2044. #endif /* RUNTIME_CPUDETECT */

  2045.     if (clip_table[512] != 255) globalInit();

  2046.     if (!rgb15to16) sws_rgb2rgb_init(flags);

  2047. 

  2048.     unscaled = (srcW == dstW && srcH == dstH);

  2049.     needsDither= (isBGR(dstFormat) || isRGB(dstFormat))

  2050.         && (fmt_depth(dstFormat))<24

  2051.         && ((fmt_depth(dstFormat))<(fmt_depth(srcFormat)) || (!(isRGB(srcFormat) || isBGR(srcFormat))));

  2052. 

  2053.     srcRange = handle_jpeg(&srcFormat);

  2054.     dstRange = handle_jpeg(&dstFormat);

  2055. 

  2056.     if (!isSupportedIn(srcFormat))

  2057.     {

  2058.         av_log(NULL, AV_LOG_ERROR, "swScaler: %s is not supported as input pixel format\n", sws_format_name(srcFormat));

  2059.         return NULL;

  2060.     }

  2061.     if (!isSupportedOut(dstFormat))

  2062.     {

  2063.         av_log(NULL, AV_LOG_ERROR, "swScaler: %s is not supported as output pixel format\n", sws_format_name(dstFormat));

  2064.         return NULL;

  2065.     }

  2066. 

  2067.     i= flags & ( SWS_POINT

  2068.                 |SWS_AREA

  2069.                 |SWS_BILINEAR

  2070.                 |SWS_FAST_BILINEAR

  2071.                 |SWS_BICUBIC

  2072.                 |SWS_X

  2073.                 |SWS_GAUSS

  2074.                 |SWS_LANCZOS

  2075.                 |SWS_SINC

  2076.                 |SWS_SPLINE

  2077.                 |SWS_BICUBLIN);

  2078.     if(!i || (i & (i-1)))

  2079.     {

  2080.         av_log(NULL, AV_LOG_ERROR, "swScaler: Exactly one scaler algorithm must be choosen\n");

  2081.         return NULL;

  2082.     }

  2083. 

  2084.     /* sanity check */

  2085.     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

  2086.     {

  2087.         av_log(NULL, AV_LOG_ERROR, "swScaler: %dx%d -> %dx%d is invalid scaling dimension\n",

  2088.                srcW, srcH, dstW, dstH);

  2089.         return NULL;

  2090.     }

  2091.     if(srcW > VOFW || dstW > VOFW){

  2092.         av_log(NULL, AV_LOG_ERROR, "swScaler: Compile time max width is "AV_STRINGIFY(VOFW)" change VOF/VOFW and recompile\n");

  2093.         return NULL;

  2094.     }

  2095. 

  2096.     if (!dstFilter) dstFilter= &dummyFilter;

  2097.     if (!srcFilter) srcFilter= &dummyFilter;

  2098. 

  2099.     c= av_mallocz(sizeof(SwsContext));

  2100. 

  2101.     c->av_class = &sws_context_class;

  2102.     c->srcW= srcW;

  2103.     c->srcH= srcH;

  2104.     c->dstW= dstW;

  2105.     c->dstH= dstH;

  2106.     c->lumXInc= ((srcW<<16) + (dstW>>1))/dstW;

  2107.     c->lumYInc= ((srcH<<16) + (dstH>>1))/dstH;

  2108.     c->flags= flags;

  2109.     c->dstFormat= dstFormat;

  2110.     c->srcFormat= srcFormat;

  2111.     c->vRounder= 4* 0x0001000100010001ULL;

  2112. 

  2113.     usesHFilter= usesVFilter= 0;

  2114.     if (dstFilter->lumV && dstFilter->lumV->length>1) usesVFilter=1;

  2115.     if (dstFilter->lumH && dstFilter->lumH->length>1) usesHFilter=1;

  2116.     if (dstFilter->chrV && dstFilter->chrV->length>1) usesVFilter=1;

  2117.     if (dstFilter->chrH && dstFilter->chrH->length>1) usesHFilter=1;

  2118.     if (srcFilter->lumV && srcFilter->lumV->length>1) usesVFilter=1;

  2119.     if (srcFilter->lumH && srcFilter->lumH->length>1) usesHFilter=1;

  2120.     if (srcFilter->chrV && srcFilter->chrV->length>1) usesVFilter=1;

  2121.     if (srcFilter->chrH && srcFilter->chrH->length>1) usesHFilter=1;

  2122. 

  2123.     getSubSampleFactors(&c->chrSrcHSubSample, &c->chrSrcVSubSample, srcFormat);

  2124.     getSubSampleFactors(&c->chrDstHSubSample, &c->chrDstVSubSample, dstFormat);

  2125. 

  2126.     // reuse chroma for 2 pixles rgb/bgr unless user wants full chroma interpolation

  2127.     if ((isBGR(dstFormat) || isRGB(dstFormat)) && !(flags&SWS_FULL_CHR_H_INT)) c->chrDstHSubSample=1;

  2128. 

  2129.     // drop some chroma lines if the user wants it

  2130.     c->vChrDrop= (flags&SWS_SRC_V_CHR_DROP_MASK)>>SWS_SRC_V_CHR_DROP_SHIFT;

  2131.     c->chrSrcVSubSample+= c->vChrDrop;

  2132. 

  2133.     // drop every 2. pixel for chroma calculation unless user wants full chroma

  2134.     if ((isBGR(srcFormat) || isRGB(srcFormat)) && !(flags&SWS_FULL_CHR_H_INP)

  2135.       && srcFormat!=PIX_FMT_RGB8      && srcFormat!=PIX_FMT_BGR8

  2136.       && srcFormat!=PIX_FMT_RGB4      && srcFormat!=PIX_FMT_BGR4

  2137.       && srcFormat!=PIX_FMT_RGB4_BYTE && srcFormat!=PIX_FMT_BGR4_BYTE

  2138.       && ((dstW>>c->chrDstHSubSample) <= (srcW>>1) || (flags&(SWS_FAST_BILINEAR|SWS_POINT))))

  2139.         c->chrSrcHSubSample=1;

  2140. 

  2141.     if (param){

  2142.         c->param[0] = param[0];

  2143.         c->param[1] = param[1];

  2144.     }else{

  2145.         c->param[0] =

  2146.         c->param[1] = SWS_PARAM_DEFAULT;

  2147.     }

  2148. 

  2149.     c->chrIntHSubSample= c->chrDstHSubSample;

  2150.     c->chrIntVSubSample= c->chrSrcVSubSample;

  2151. 

  2152.     // Note the -((-x)>>y) is so that we always round toward +inf.

  2153.     c->chrSrcW= -((-srcW) >> c->chrSrcHSubSample);

  2154.     c->chrSrcH= -((-srcH) >> c->chrSrcVSubSample);

  2155.     c->chrDstW= -((-dstW) >> c->chrDstHSubSample);

  2156.     c->chrDstH= -((-dstH) >> c->chrDstVSubSample);

  2157. 

  2158.     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);

  2159. 

  2160.     /* unscaled special Cases */

  2161.     if (unscaled && !usesHFilter && !usesVFilter && (srcRange == dstRange || isBGR(dstFormat) || isRGB(dstFormat)))

  2162.     {

  2163.         /* yv12_to_nv12 */

  2164.         if (srcFormat == PIX_FMT_YUV420P && (dstFormat == PIX_FMT_NV12 || dstFormat == PIX_FMT_NV21))

  2165.         {

  2166.             c->swScale= PlanarToNV12Wrapper;

  2167.         }

  2168. #ifdef CONFIG_GPL

  2169.         /* yuv2bgr */

  2170.         if ((srcFormat==PIX_FMT_YUV420P || srcFormat==PIX_FMT_YUV422P) && (isBGR(dstFormat) || isRGB(dstFormat))

  2171.             && !(flags & SWS_ACCURATE_RND))

  2172.         {

  2173.             c->swScale= yuv2rgb_get_func_ptr(c);

  2174.         }

  2175. #endif

  2176. 

  2177.         if (srcFormat==PIX_FMT_YUV410P && dstFormat==PIX_FMT_YUV420P && !(flags & SWS_BITEXACT))

  2178.         {

  2179.             c->swScale= yvu9toyv12Wrapper;

  2180.         }

  2181. 

  2182.         /* bgr24toYV12 */

  2183.         if (srcFormat==PIX_FMT_BGR24 && dstFormat==PIX_FMT_YUV420P && !(flags & SWS_ACCURATE_RND))

  2184.             c->swScale= bgr24toyv12Wrapper;

  2185. 

  2186.         /* rgb/bgr -> rgb/bgr (no dither needed forms) */

  2187.         if (  (isBGR(srcFormat) || isRGB(srcFormat))

  2188.            && (isBGR(dstFormat) || isRGB(dstFormat))

  2189.            && srcFormat != PIX_FMT_BGR8      && dstFormat != PIX_FMT_BGR8

  2190.            && srcFormat != PIX_FMT_RGB8      && dstFormat != PIX_FMT_RGB8

  2191.            && srcFormat != PIX_FMT_BGR4      && dstFormat != PIX_FMT_BGR4

  2192.            && srcFormat != PIX_FMT_RGB4      && dstFormat != PIX_FMT_RGB4

  2193.            && srcFormat != PIX_FMT_BGR4_BYTE && dstFormat != PIX_FMT_BGR4_BYTE

  2194.            && srcFormat != PIX_FMT_RGB4_BYTE && dstFormat != PIX_FMT_RGB4_BYTE

  2195.            && srcFormat != PIX_FMT_MONOBLACK && dstFormat != PIX_FMT_MONOBLACK

  2196.            && srcFormat != PIX_FMT_MONOWHITE && dstFormat != PIX_FMT_MONOWHITE

  2197.                                              && dstFormat != PIX_FMT_RGB32_1

  2198.                                              && dstFormat != PIX_FMT_BGR32_1

  2199.            && (!needsDither || (c->flags&(SWS_FAST_BILINEAR|SWS_POINT))))

  2200.              c->swScale= rgb2rgbWrapper;

  2201. 

  2202.         if (srcFormat == PIX_FMT_YUV422P)

  2203.         {

  2204.             if (dstFormat == PIX_FMT_YUYV422)

  2205.                 c->swScale= YUV422PToYuy2Wrapper;

  2206.             else if (dstFormat == PIX_FMT_UYVY422)

  2207.                 c->swScale= YUV422PToUyvyWrapper;

  2208.         }

  2209. 

  2210.         /* LQ converters if -sws 0 or -sws 4*/

  2211.         if (c->flags&(SWS_FAST_BILINEAR|SWS_POINT)){

  2212.             /* yv12_to_yuy2 */

  2213.             if (srcFormat == PIX_FMT_YUV420P)

  2214.             {

  2215.                 if (dstFormat == PIX_FMT_YUYV422)

  2216.                     c->swScale= PlanarToYuy2Wrapper;

  2217.                 else if (dstFormat == PIX_FMT_UYVY422)

  2218.                     c->swScale= PlanarToUyvyWrapper;

  2219.             }

  2220.         }

  2221. 

  2222. #ifdef COMPILE_ALTIVEC

  2223.         if ((c->flags & SWS_CPU_CAPS_ALTIVEC) &&

  2224.             srcFormat == PIX_FMT_YUV420P) {

  2225.           // unscaled YV12 -> packed YUV, we want speed

  2226.           if (dstFormat == PIX_FMT_YUYV422)

  2227.               c->swScale= yv12toyuy2_unscaled_altivec;

  2228.           else if (dstFormat == PIX_FMT_UYVY422)

  2229.               c->swScale= yv12touyvy_unscaled_altivec;

  2230.         }

  2231. #endif

  2232. 

  2233.         /* simple copy */

  2234.         if (  srcFormat == dstFormat

  2235.             || (isPlanarYUV(srcFormat) && isGray(dstFormat))

  2236.             || (isPlanarYUV(dstFormat) && isGray(srcFormat)))

  2237.         {

  2238.             if (isPacked(c->srcFormat))

  2239.                 c->swScale= packedCopy;

  2240.             else /* Planar YUV or gray */

  2241.                 c->swScale= planarCopy;

  2242.         }

  2243. 

  2244.         /* gray16{le,be} conversions */

  2245.         if (isGray16(srcFormat) && (isPlanarYUV(dstFormat) || (dstFormat == PIX_FMT_GRAY8)))

  2246.         {

  2247.             c->swScale= gray16togray;

  2248.         }

  2249.         if ((isPlanarYUV(srcFormat) || (srcFormat == PIX_FMT_GRAY8)) && isGray16(dstFormat))

  2250.         {

  2251.             c->swScale= graytogray16;

  2252.         }

  2253.         if (srcFormat != dstFormat && isGray16(srcFormat) && isGray16(dstFormat))

  2254.         {

  2255.             c->swScale= gray16swap;

  2256.         }

  2257. 

  2258. #ifdef ARCH_BFIN

  2259.         if (flags & SWS_CPU_CAPS_BFIN)

  2260.             ff_bfin_get_unscaled_swscale (c);

  2261. #endif

  2262. 

  2263.         if (c->swScale){

  2264.             if (flags&SWS_PRINT_INFO)

  2265.                 av_log(c, AV_LOG_INFO, "using unscaled %s -> %s special converter\n",

  2266.                                 sws_format_name(srcFormat), sws_format_name(dstFormat));

  2267.             return c;

  2268.         }

  2269.     }

  2270. 

  2271.     if (flags & SWS_CPU_CAPS_MMX2)

  2272.     {

  2273.         c->canMMX2BeUsed= (dstW >=srcW && (dstW&31)==0 && (srcW&15)==0) ? 1 : 0;

  2274.         if (!c->canMMX2BeUsed && dstW >=srcW && (srcW&15)==0 && (flags&SWS_FAST_BILINEAR))

  2275.         {

  2276.             if (flags&SWS_PRINT_INFO)

  2277.                 av_log(c, AV_LOG_INFO, "output Width is not a multiple of 32 -> no MMX2 scaler\n");

  2278.         }

  2279.         if (usesHFilter) c->canMMX2BeUsed=0;

  2280.     }

  2281.     else

  2282.         c->canMMX2BeUsed=0;

  2283. 

  2284.     c->chrXInc= ((c->chrSrcW<<16) + (c->chrDstW>>1))/c->chrDstW;

  2285.     c->chrYInc= ((c->chrSrcH<<16) + (c->chrDstH>>1))/c->chrDstH;

  2286. 

  2287.     // match pixel 0 of the src to pixel 0 of dst and match pixel n-2 of src to pixel n-2 of dst

  2288.     // but only for the FAST_BILINEAR mode otherwise do correct scaling

  2289.     // n-2 is the last chrominance sample available

  2290.     // this is not perfect, but no one should notice the difference, the more correct variant

  2291.     // would be like the vertical one, but that would require some special code for the

  2292.     // first and last pixel

  2293.     if (flags&SWS_FAST_BILINEAR)

  2294.     {

  2295.         if (c->canMMX2BeUsed)

  2296.         {

  2297.             c->lumXInc+= 20;

  2298.             c->chrXInc+= 20;

  2299.         }

  2300.         //we don't use the x86asm scaler if mmx is available

  2301.         else if (flags & SWS_CPU_CAPS_MMX)

  2302.         {

  2303.             c->lumXInc = ((srcW-2)<<16)/(dstW-2) - 20;

  2304.             c->chrXInc = ((c->chrSrcW-2)<<16)/(c->chrDstW-2) - 20;

  2305.         }

  2306.     }

  2307. 

  2308.     /* precalculate horizontal scaler filter coefficients */

  2309.     {

  2310.         const int filterAlign=

  2311.             (flags & SWS_CPU_CAPS_MMX) ? 4 :

  2312.             (flags & SWS_CPU_CAPS_ALTIVEC) ? 8 :

  2313.             1;

  2314. 

  2315.         initFilter(&c->hLumFilter, &c->hLumFilterPos, &c->hLumFilterSize, c->lumXInc,

  2316.                    srcW      ,       dstW, filterAlign, 1<<14,

  2317.                    (flags&SWS_BICUBLIN) ? (flags|SWS_BICUBIC)  : flags,

  2318.                    srcFilter->lumH, dstFilter->lumH, c->param);

  2319.         initFilter(&c->hChrFilter, &c->hChrFilterPos, &c->hChrFilterSize, c->chrXInc,

  2320.                    c->chrSrcW, c->chrDstW, filterAlign, 1<<14,

  2321.                    (flags&SWS_BICUBLIN) ? (flags|SWS_BILINEAR) : flags,

  2322.                    srcFilter->chrH, dstFilter->chrH, c->param);

  2323. 

  2324. #define MAX_FUNNY_CODE_SIZE 10000

  2325. #if defined(COMPILE_MMX2)

  2326. // can't downscale !!!

  2327.         if (c->canMMX2BeUsed && (flags & SWS_FAST_BILINEAR))

  2328.         {

  2329. #ifdef MAP_ANONYMOUS

  2330.             c->funnyYCode = (uint8_t*)mmap(NULL, MAX_FUNNY_CODE_SIZE, PROT_EXEC | PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, 0, 0);

  2331.             c->funnyUVCode = (uint8_t*)mmap(NULL, MAX_FUNNY_CODE_SIZE, PROT_EXEC | PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, 0, 0);

  2332. #else

  2333.             c->funnyYCode = av_malloc(MAX_FUNNY_CODE_SIZE);

  2334.             c->funnyUVCode = av_malloc(MAX_FUNNY_CODE_SIZE);

  2335. #endif

  2336. 

  2337.             c->lumMmx2Filter   = av_malloc((dstW        /8+8)*sizeof(int16_t));

  2338.             c->chrMmx2Filter   = av_malloc((c->chrDstW  /4+8)*sizeof(int16_t));

  2339.             c->lumMmx2FilterPos= av_malloc((dstW      /2/8+8)*sizeof(int32_t));

  2340.             c->chrMmx2FilterPos= av_malloc((c->chrDstW/2/4+8)*sizeof(int32_t));

  2341. 

  2342.             initMMX2HScaler(      dstW, c->lumXInc, c->funnyYCode , c->lumMmx2Filter, c->lumMmx2FilterPos, 8);

  2343.             initMMX2HScaler(c->chrDstW, c->chrXInc, c->funnyUVCode, c->chrMmx2Filter, c->chrMmx2FilterPos, 4);

  2344.         }

  2345. #endif /* defined(COMPILE_MMX2) */

  2346.     } // Init Horizontal stuff

  2347. 

  2348. 

  2349. 

  2350.     /* precalculate vertical scaler filter coefficients */

  2351.     {

  2352.         const int filterAlign=

  2353.             (flags & SWS_CPU_CAPS_MMX) && (flags & SWS_ACCURATE_RND) ? 2 :

  2354.             (flags & SWS_CPU_CAPS_ALTIVEC) ? 8 :

  2355.             1;

  2356. 

  2357.         initFilter(&c->vLumFilter, &c->vLumFilterPos, &c->vLumFilterSize, c->lumYInc,

  2358.                    srcH      ,        dstH, filterAlign, (1<<12),

  2359.                    (flags&SWS_BICUBLIN) ? (flags|SWS_BICUBIC)  : flags,

  2360.                    srcFilter->lumV, dstFilter->lumV, c->param);

  2361.         initFilter(&c->vChrFilter, &c->vChrFilterPos, &c->vChrFilterSize, c->chrYInc,

  2362.                    c->chrSrcH, c->chrDstH, filterAlign, (1<<12),

  2363.                    (flags&SWS_BICUBLIN) ? (flags|SWS_BILINEAR) : flags,

  2364.                    srcFilter->chrV, dstFilter->chrV, c->param);

  2365. 

  2366. #ifdef HAVE_ALTIVEC

  2367.         c->vYCoeffsBank = av_malloc(sizeof (vector signed short)*c->vLumFilterSize*c->dstH);

  2368.         c->vCCoeffsBank = av_malloc(sizeof (vector signed short)*c->vChrFilterSize*c->chrDstH);

  2369. 

  2370.         for (i=0;i<c->vLumFilterSize*c->dstH;i++) {

  2371.             int j;

  2372.             short *p = (short *)&c->vYCoeffsBank[i];

  2373.             for (j=0;j<8;j++)

  2374.                 p[j] = c->vLumFilter[i];

  2375.         }

  2376. 

  2377.         for (i=0;i<c->vChrFilterSize*c->chrDstH;i++) {

  2378.             int j;

  2379.             short *p = (short *)&c->vCCoeffsBank[i];

  2380.             for (j=0;j<8;j++)

  2381.                 p[j] = c->vChrFilter[i];

  2382.         }

  2383. #endif

  2384.     }

  2385. 

  2386.     // Calculate Buffer Sizes so that they won't run out while handling these damn slices

  2387.     c->vLumBufSize= c->vLumFilterSize;

  2388.     c->vChrBufSize= c->vChrFilterSize;

  2389.     for (i=0; i<dstH; i++)

  2390.     {

  2391.         int chrI= i*c->chrDstH / dstH;

  2392.         int nextSlice= FFMAX(c->vLumFilterPos[i   ] + c->vLumFilterSize - 1,

  2393.                            ((c->vChrFilterPos[chrI] + c->vChrFilterSize - 1)<<c->chrSrcVSubSample));

  2394. 

  2395.         nextSlice>>= c->chrSrcVSubSample;

  2396.         nextSlice<<= c->chrSrcVSubSample;

  2397.         if (c->vLumFilterPos[i   ] + c->vLumBufSize < nextSlice)

  2398.             c->vLumBufSize= nextSlice - c->vLumFilterPos[i];

  2399.         if (c->vChrFilterPos[chrI] + c->vChrBufSize < (nextSlice>>c->chrSrcVSubSample))

  2400.             c->vChrBufSize= (nextSlice>>c->chrSrcVSubSample) - c->vChrFilterPos[chrI];

  2401.     }

  2402. 

  2403.     // allocate pixbufs (we use dynamic allocation because otherwise we would need to

  2404.     c->lumPixBuf= av_malloc(c->vLumBufSize*2*sizeof(int16_t*));

  2405.     c->chrPixBuf= av_malloc(c->vChrBufSize*2*sizeof(int16_t*));

  2406.     //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)

  2407.     /* align at 16 bytes for AltiVec */

  2408.     for (i=0; i<c->vLumBufSize; i++)

  2409.         c->lumPixBuf[i]= c->lumPixBuf[i+c->vLumBufSize]= av_mallocz(VOF+1);

  2410.     for (i=0; i<c->vChrBufSize; i++)

  2411.         c->chrPixBuf[i]= c->chrPixBuf[i+c->vChrBufSize]= av_malloc((VOF+1)*2);

  2412. 

  2413.     //try to avoid drawing green stuff between the right end and the stride end

  2414.     for (i=0; i<c->vChrBufSize; i++) memset(c->chrPixBuf[i], 64, (VOF+1)*2);

  2415. 

  2416.     assert(2*VOFW == VOF);

  2417. 

  2418.     assert(c->chrDstH <= dstH);

  2419. 

  2420.     if (flags&SWS_PRINT_INFO)

  2421.     {

  2422. #ifdef DITHER1XBPP

  2423.         const char *dither= " dithered";

  2424. #else

  2425.         const char *dither= "";

  2426. #endif

  2427.         if (flags&SWS_FAST_BILINEAR)

  2428.             av_log(c, AV_LOG_INFO, "FAST_BILINEAR scaler, ");

  2429.         else if (flags&SWS_BILINEAR)

  2430.             av_log(c, AV_LOG_INFO, "BILINEAR scaler, ");

  2431.         else if (flags&SWS_BICUBIC)

  2432.             av_log(c, AV_LOG_INFO, "BICUBIC scaler, ");

  2433.         else if (flags&SWS_X)

  2434.             av_log(c, AV_LOG_INFO, "Experimental scaler, ");

  2435.         else if (flags&SWS_POINT)

  2436.             av_log(c, AV_LOG_INFO, "Nearest Neighbor / POINT scaler, ");

  2437.         else if (flags&SWS_AREA)

  2438.             av_log(c, AV_LOG_INFO, "Area Averageing scaler, ");

  2439.         else if (flags&SWS_BICUBLIN)

  2440.             av_log(c, AV_LOG_INFO, "luma BICUBIC / chroma BILINEAR scaler, ");

  2441.         else if (flags&SWS_GAUSS)

  2442.             av_log(c, AV_LOG_INFO, "Gaussian scaler, ");

  2443.         else if (flags&SWS_SINC)

  2444.             av_log(c, AV_LOG_INFO, "Sinc scaler, ");

  2445.         else if (flags&SWS_LANCZOS)

  2446.             av_log(c, AV_LOG_INFO, "Lanczos scaler, ");

  2447.         else if (flags&SWS_SPLINE)

  2448.             av_log(c, AV_LOG_INFO, "Bicubic spline scaler, ");

  2449.         else

  2450.             av_log(c, AV_LOG_INFO, "ehh flags invalid?! ");

  2451. 

  2452.         if (dstFormat==PIX_FMT_BGR555 || dstFormat==PIX_FMT_BGR565)

  2453.             av_log(c, AV_LOG_INFO, "from %s to%s %s ",

  2454.                    sws_format_name(srcFormat), dither, sws_format_name(dstFormat));

  2455.         else

  2456.             av_log(c, AV_LOG_INFO, "from %s to %s ",

  2457.                    sws_format_name(srcFormat), sws_format_name(dstFormat));

  2458. 

  2459.         if (flags & SWS_CPU_CAPS_MMX2)

  2460.             av_log(c, AV_LOG_INFO, "using MMX2\n");

  2461.         else if (flags & SWS_CPU_CAPS_3DNOW)

  2462.             av_log(c, AV_LOG_INFO, "using 3DNOW\n");

  2463.         else if (flags & SWS_CPU_CAPS_MMX)

  2464.             av_log(c, AV_LOG_INFO, "using MMX\n");

  2465.         else if (flags & SWS_CPU_CAPS_ALTIVEC)

  2466.             av_log(c, AV_LOG_INFO, "using AltiVec\n");

  2467.         else

  2468.             av_log(c, AV_LOG_INFO, "using C\n");

  2469.     }

  2470. 

  2471.     if (flags & SWS_PRINT_INFO)

  2472.     {

  2473.         if (flags & SWS_CPU_CAPS_MMX)

  2474.         {

  2475.             if (c->canMMX2BeUsed && (flags&SWS_FAST_BILINEAR))

  2476.                 av_log(c, AV_LOG_VERBOSE, "using FAST_BILINEAR MMX2 scaler for horizontal scaling\n");

  2477.             else

  2478.             {

  2479.                 if (c->hLumFilterSize==4)

  2480.                     av_log(c, AV_LOG_VERBOSE, "using 4-tap MMX scaler for horizontal luminance scaling\n");

  2481.                 else if (c->hLumFilterSize==8)

  2482.                     av_log(c, AV_LOG_VERBOSE, "using 8-tap MMX scaler for horizontal luminance scaling\n");

  2483.                 else

  2484.                     av_log(c, AV_LOG_VERBOSE, "using n-tap MMX scaler for horizontal luminance scaling\n");

  2485. 

  2486.                 if (c->hChrFilterSize==4)

  2487.                     av_log(c, AV_LOG_VERBOSE, "using 4-tap MMX scaler for horizontal chrominance scaling\n");

  2488.                 else if (c->hChrFilterSize==8)

  2489.                     av_log(c, AV_LOG_VERBOSE, "using 8-tap MMX scaler for horizontal chrominance scaling\n");

  2490.                 else

  2491.                     av_log(c, AV_LOG_VERBOSE, "using n-tap MMX scaler for horizontal chrominance scaling\n");

  2492.             }

  2493.         }

  2494.         else

  2495.         {

  2496. #if defined(ARCH_X86)

  2497.             av_log(c, AV_LOG_VERBOSE, "using X86-Asm scaler for horizontal scaling\n");

  2498. #else

  2499.             if (flags & SWS_FAST_BILINEAR)

  2500.                 av_log(c, AV_LOG_VERBOSE, "using FAST_BILINEAR C scaler for horizontal scaling\n");

  2501.             else

  2502.                 av_log(c, AV_LOG_VERBOSE, "using C scaler for horizontal scaling\n");

  2503. #endif

  2504.         }

  2505.         if (isPlanarYUV(dstFormat))

  2506.         {

  2507.             if (c->vLumFilterSize==1)

  2508.                 av_log(c, AV_LOG_VERBOSE, "using 1-tap %s \"scaler\" for vertical scaling (YV12 like)\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");

  2509.             else

  2510.                 av_log(c, AV_LOG_VERBOSE, "using n-tap %s scaler for vertical scaling (YV12 like)\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");

  2511.         }

  2512.         else

  2513.         {

  2514.             if (c->vLumFilterSize==1 && c->vChrFilterSize==2)

  2515.                 av_log(c, AV_LOG_VERBOSE, "using 1-tap %s \"scaler\" for vertical luminance scaling (BGR)\n"

  2516.                        "      2-tap scaler for vertical chrominance scaling (BGR)\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");

  2517.             else if (c->vLumFilterSize==2 && c->vChrFilterSize==2)

  2518.                 av_log(c, AV_LOG_VERBOSE, "using 2-tap linear %s scaler for vertical scaling (BGR)\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");

  2519.             else

  2520.                 av_log(c, AV_LOG_VERBOSE, "using n-tap %s scaler for vertical scaling (BGR)\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");

  2521.         }

  2522. 

  2523.         if (dstFormat==PIX_FMT_BGR24)

  2524.             av_log(c, AV_LOG_VERBOSE, "using %s YV12->BGR24 Converter\n",

  2525.                    (flags & SWS_CPU_CAPS_MMX2) ? "MMX2" : ((flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C"));

  2526.         else if (dstFormat==PIX_FMT_RGB32)

  2527.             av_log(c, AV_LOG_VERBOSE, "using %s YV12->BGR32 Converter\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");

  2528.         else if (dstFormat==PIX_FMT_BGR565)

  2529.             av_log(c, AV_LOG_VERBOSE, "using %s YV12->BGR16 Converter\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");

  2530.         else if (dstFormat==PIX_FMT_BGR555)

  2531.             av_log(c, AV_LOG_VERBOSE, "using %s YV12->BGR15 Converter\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");

  2532. 

  2533.         av_log(c, AV_LOG_VERBOSE, "%dx%d -> %dx%d\n", srcW, srcH, dstW, dstH);

  2534.     }

  2535.     if (flags & SWS_PRINT_INFO)

  2536.     {

  2537.         av_log(c, AV_LOG_DEBUG, "Lum srcW=%d srcH=%d dstW=%d dstH=%d xInc=%d yInc=%d\n",

  2538.                c->srcW, c->srcH, c->dstW, c->dstH, c->lumXInc, c->lumYInc);

  2539.         av_log(c, AV_LOG_DEBUG, "Chr srcW=%d srcH=%d dstW=%d dstH=%d xInc=%d yInc=%d\n",

  2540.                c->chrSrcW, c->chrSrcH, c->chrDstW, c->chrDstH, c->chrXInc, c->chrYInc);

  2541.     }

  2542. 

  2543.     c->swScale= getSwsFunc(flags);

  2544.     return c;

  2545. }

  2546. 

  2547. /**

  2548.  * swscale wrapper, so we don't need to export the SwsContext.

  2549.  * assumes planar YUV to be in YUV order instead of YVU

  2550.  */

  2551. int sws_scale(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  2552.               int srcSliceH, uint8_t* dst[], int dstStride[]){

  2553.     int i;

  2554.     uint8_t* src2[4]= {src[0], src[1], src[2]};

  2555.     uint32_t pal[256];

  2556.     int use_pal=   c->srcFormat == PIX_FMT_PAL8

  2557.                 || c->srcFormat == PIX_FMT_BGR4_BYTE

  2558.                 || c->srcFormat == PIX_FMT_RGB4_BYTE

  2559.                 || c->srcFormat == PIX_FMT_BGR8

  2560.                 || c->srcFormat == PIX_FMT_RGB8;

  2561. 

  2562.     if (c->sliceDir == 0 && srcSliceY != 0 && srcSliceY + srcSliceH != c->srcH) {

  2563.         av_log(c, AV_LOG_ERROR, "Slices start in the middle!\n");

  2564.         return 0;

  2565.     }

  2566.     if (c->sliceDir == 0) {

  2567.         if (srcSliceY == 0) c->sliceDir = 1; else c->sliceDir = -1;

  2568.     }

  2569. 

  2570.     if (use_pal){

  2571.         for (i=0; i<256; i++){

  2572.             int p, r, g, b,y,u,v;

  2573.             if(c->srcFormat == PIX_FMT_PAL8){

  2574.                 p=((uint32_t*)(src[1]))[i];

  2575.                 r= (p>>16)&0xFF;

  2576.                 g= (p>> 8)&0xFF;

  2577.                 b=  p     &0xFF;

  2578.             }else if(c->srcFormat == PIX_FMT_RGB8){

  2579.                 r= (i>>5    )*36;

  2580.                 g= ((i>>2)&7)*36;

  2581.                 b= (i&3     )*85;

  2582.             }else if(c->srcFormat == PIX_FMT_BGR8){

  2583.                 b= (i>>6    )*85;

  2584.                 g= ((i>>3)&7)*36;

  2585.                 r= (i&7     )*36;

  2586.             }else if(c->srcFormat == PIX_FMT_RGB4_BYTE){

  2587.                 r= (i>>3    )*255;

  2588.                 g= ((i>>1)&3)*85;

  2589.                 b= (i&1     )*255;

  2590.             }else if(c->srcFormat == PIX_FMT_BGR4_BYTE){

  2591.                 b= (i>>3    )*255;

  2592.                 g= ((i>>1)&3)*85;

  2593.                 r= (i&1     )*255;

  2594.             }

  2595.             y= av_clip_uint8((RY*r + GY*g + BY*b + ( 33<<(RGB2YUV_SHIFT-1)))>>RGB2YUV_SHIFT);

  2596.             u= av_clip_uint8((RU*r + GU*g + BU*b + (257<<(RGB2YUV_SHIFT-1)))>>RGB2YUV_SHIFT);

  2597.             v= av_clip_uint8((RV*r + GV*g + BV*b + (257<<(RGB2YUV_SHIFT-1)))>>RGB2YUV_SHIFT);

  2598.             pal[i]= y + (u<<8) + (v<<16);

  2599.         }

  2600.         src2[1]= (uint8_t*)pal;

  2601.     }

  2602. 

  2603.     // copy strides, so they can safely be modified

  2604.     if (c->sliceDir == 1) {

  2605.         // slices go from top to bottom

  2606.         int srcStride2[4]= {srcStride[0], srcStride[1], srcStride[2]};

  2607.         int dstStride2[4]= {dstStride[0], dstStride[1], dstStride[2]};

  2608.         return c->swScale(c, src2, srcStride2, srcSliceY, srcSliceH, dst, dstStride2);

  2609.     } else {

  2610.         // slices go from bottom to top => we flip the image internally

  2611.         uint8_t* dst2[4]= {dst[0] + (c->dstH-1)*dstStride[0],

  2612.                            dst[1] + ((c->dstH>>c->chrDstVSubSample)-1)*dstStride[1],

  2613.                            dst[2] + ((c->dstH>>c->chrDstVSubSample)-1)*dstStride[2]};

  2614.         int srcStride2[4]= {-srcStride[0], -srcStride[1], -srcStride[2]};

  2615.         int dstStride2[4]= {-dstStride[0], -dstStride[1], -dstStride[2]};

  2616. 

  2617.         src2[0] += (srcSliceH-1)*srcStride[0];

  2618.         if (!use_pal)

  2619.             src2[1] += ((srcSliceH>>c->chrSrcVSubSample)-1)*srcStride[1];

  2620.         src2[2] += ((srcSliceH>>c->chrSrcVSubSample)-1)*srcStride[2];

  2621. 

  2622.         return c->swScale(c, src2, srcStride2, c->srcH-srcSliceY-srcSliceH, srcSliceH, dst2, dstStride2);

  2623.     }

  2624. }

  2625. 

  2626. /**

  2627.  * swscale wrapper, so we don't need to export the SwsContext

  2628.  */

  2629. int sws_scale_ordered(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,

  2630.                       int srcSliceH, uint8_t* dst[], int dstStride[]){

  2631.     return sws_scale(c, src, srcStride, srcSliceY, srcSliceH, dst, dstStride);

  2632. }

  2633. 

  2634. SwsFilter *sws_getDefaultFilter(float lumaGBlur, float chromaGBlur,

  2635.                                 float lumaSharpen, float chromaSharpen,

  2636.                                 float chromaHShift, float chromaVShift,

  2637.                                 int verbose)

  2638. {

  2639.     SwsFilter *filter= av_malloc(sizeof(SwsFilter));

  2640. 

  2641.     if (lumaGBlur!=0.0){

  2642.         filter->lumH= sws_getGaussianVec(lumaGBlur, 3.0);

  2643.         filter->lumV= sws_getGaussianVec(lumaGBlur, 3.0);

  2644.     }else{

  2645.         filter->lumH= sws_getIdentityVec();

  2646.         filter->lumV= sws_getIdentityVec();

  2647.     }

  2648. 

  2649.     if (chromaGBlur!=0.0){

  2650.         filter->chrH= sws_getGaussianVec(chromaGBlur, 3.0);

  2651.         filter->chrV= sws_getGaussianVec(chromaGBlur, 3.0);

  2652.     }else{

  2653.         filter->chrH= sws_getIdentityVec();

  2654.         filter->chrV= sws_getIdentityVec();

  2655.     }

  2656. 

  2657.     if (chromaSharpen!=0.0){

  2658.         SwsVector *id= sws_getIdentityVec();

  2659.         sws_scaleVec(filter->chrH, -chromaSharpen);

  2660.         sws_scaleVec(filter->chrV, -chromaSharpen);

  2661.         sws_addVec(filter->chrH, id);

  2662.         sws_addVec(filter->chrV, id);

  2663.         sws_freeVec(id);

  2664.     }

  2665. 

  2666.     if (lumaSharpen!=0.0){

  2667.         SwsVector *id= sws_getIdentityVec();

  2668.         sws_scaleVec(filter->lumH, -lumaSharpen);

  2669.         sws_scaleVec(filter->lumV, -lumaSharpen);

  2670.         sws_addVec(filter->lumH, id);

  2671.         sws_addVec(filter->lumV, id);

  2672.         sws_freeVec(id);

  2673.     }

  2674. 

  2675.     if (chromaHShift != 0.0)

  2676.         sws_shiftVec(filter->chrH, (int)(chromaHShift+0.5));

  2677. 

  2678.     if (chromaVShift != 0.0)

  2679.         sws_shiftVec(filter->chrV, (int)(chromaVShift+0.5));

  2680. 

  2681.     sws_normalizeVec(filter->chrH, 1.0);

  2682.     sws_normalizeVec(filter->chrV, 1.0);

  2683.     sws_normalizeVec(filter->lumH, 1.0);

  2684.     sws_normalizeVec(filter->lumV, 1.0);

  2685. 

  2686.     if (verbose) sws_printVec(filter->chrH);

  2687.     if (verbose) sws_printVec(filter->lumH);

  2688. 

  2689.     return filter;

  2690. }

  2691. 

  2692. /**

  2693.  * returns a normalized gaussian curve used to filter stuff

  2694.  * quality=3 is high quality, lowwer is lowwer quality

  2695.  */

  2696. SwsVector *sws_getGaussianVec(double variance, double quality){

  2697.     const int length= (int)(variance*quality + 0.5) | 1;

  2698.     int i;

  2699.     double *coeff= av_malloc(length*sizeof(double));

  2700.     double middle= (length-1)*0.5;

  2701.     SwsVector *vec= av_malloc(sizeof(SwsVector));

  2702. 

  2703.     vec->coeff= coeff;

  2704.     vec->length= length;

  2705. 

  2706.     for (i=0; i<length; i++)

  2707.     {

  2708.         double dist= i-middle;

  2709.         coeff[i]= exp(-dist*dist/(2*variance*variance)) / sqrt(2*variance*PI);

  2710.     }

  2711. 

  2712.     sws_normalizeVec(vec, 1.0);

  2713. 

  2714.     return vec;

  2715. }

  2716. 

  2717. SwsVector *sws_getConstVec(double c, int length){

  2718.     int i;

  2719.     double *coeff= av_malloc(length*sizeof(double));

  2720.     SwsVector *vec= av_malloc(sizeof(SwsVector));

  2721. 

  2722.     vec->coeff= coeff;

  2723.     vec->length= length;

  2724. 

  2725.     for (i=0; i<length; i++)

  2726.         coeff[i]= c;

  2727. 

  2728.     return vec;

  2729. }

  2730. 

  2731. 

  2732. SwsVector *sws_getIdentityVec(void){

  2733.     return sws_getConstVec(1.0, 1);

  2734. }

  2735. 

  2736. double sws_dcVec(SwsVector *a){

  2737.     int i;

  2738.     double sum=0;

  2739. 

  2740.     for (i=0; i<a->length; i++)

  2741.         sum+= a->coeff[i];

  2742. 

  2743.     return sum;

  2744. }

  2745. 

  2746. void sws_scaleVec(SwsVector *a, double scalar){

  2747.     int i;

  2748. 

  2749.     for (i=0; i<a->length; i++)

  2750.         a->coeff[i]*= scalar;

  2751. }

  2752. 

  2753. void sws_normalizeVec(SwsVector *a, double height){

  2754.     sws_scaleVec(a, height/sws_dcVec(a));

  2755. }

  2756. 

  2757. static SwsVector *sws_getConvVec(SwsVector *a, SwsVector *b){

  2758.     int length= a->length + b->length - 1;

  2759.     double *coeff= av_malloc(length*sizeof(double));

  2760.     int i, j;

  2761.     SwsVector *vec= av_malloc(sizeof(SwsVector));

  2762. 

  2763.     vec->coeff= coeff;

  2764.     vec->length= length;

  2765. 

  2766.     for (i=0; i<length; i++) coeff[i]= 0.0;

  2767. 

  2768.     for (i=0; i<a->length; i++)

  2769.     {

  2770.         for (j=0; j<b->length; j++)

  2771.         {

  2772.             coeff[i+j]+= a->coeff[i]*b->coeff[j];

  2773.         }

  2774.     }

  2775. 

  2776.     return vec;

  2777. }

  2778. 

  2779. static SwsVector *sws_sumVec(SwsVector *a, SwsVector *b){

  2780.     int length= FFMAX(a->length, b->length);

  2781.     double *coeff= av_malloc(length*sizeof(double));

  2782.     int i;

  2783.     SwsVector *vec= av_malloc(sizeof(SwsVector));

  2784. 

  2785.     vec->coeff= coeff;

  2786.     vec->length= length;

  2787. 

  2788.     for (i=0; i<length; i++) coeff[i]= 0.0;

  2789. 

  2790.     for (i=0; i<a->length; i++) coeff[i + (length-1)/2 - (a->length-1)/2]+= a->coeff[i];

  2791.     for (i=0; i<b->length; i++) coeff[i + (length-1)/2 - (b->length-1)/2]+= b->coeff[i];

  2792. 

  2793.     return vec;

  2794. }

  2795. 

  2796. static SwsVector *sws_diffVec(SwsVector *a, SwsVector *b){

  2797.     int length= FFMAX(a->length, b->length);

  2798.     double *coeff= av_malloc(length*sizeof(double));

  2799.     int i;

  2800.     SwsVector *vec= av_malloc(sizeof(SwsVector));

  2801. 

  2802.     vec->coeff= coeff;

  2803.     vec->length= length;

  2804. 

  2805.     for (i=0; i<length; i++) coeff[i]= 0.0;

  2806. 

  2807.     for (i=0; i<a->length; i++) coeff[i + (length-1)/2 - (a->length-1)/2]+= a->coeff[i];

  2808.     for (i=0; i<b->length; i++) coeff[i + (length-1)/2 - (b->length-1)/2]-= b->coeff[i];

  2809. 

  2810.     return vec;

  2811. }

  2812. 

  2813. /* shift left / or right if "shift" is negative */

  2814. static SwsVector *sws_getShiftedVec(SwsVector *a, int shift){

  2815.     int length= a->length + FFABS(shift)*2;

  2816.     double *coeff= av_malloc(length*sizeof(double));

  2817.     int i;

  2818.     SwsVector *vec= av_malloc(sizeof(SwsVector));

  2819. 

  2820.     vec->coeff= coeff;

  2821.     vec->length= length;

  2822. 

  2823.     for (i=0; i<length; i++) coeff[i]= 0.0;

  2824. 

  2825.     for (i=0; i<a->length; i++)

  2826.     {

  2827.         coeff[i + (length-1)/2 - (a->length-1)/2 - shift]= a->coeff[i];

  2828.     }

  2829. 

  2830.     return vec;

  2831. }

  2832. 

  2833. void sws_shiftVec(SwsVector *a, int shift){

  2834.     SwsVector *shifted= sws_getShiftedVec(a, shift);

  2835.     av_free(a->coeff);

  2836.     a->coeff= shifted->coeff;

  2837.     a->length= shifted->length;

  2838.     av_free(shifted);

  2839. }

  2840. 

  2841. void sws_addVec(SwsVector *a, SwsVector *b){

  2842.     SwsVector *sum= sws_sumVec(a, b);

  2843.     av_free(a->coeff);

  2844.     a->coeff= sum->coeff;

  2845.     a->length= sum->length;

  2846.     av_free(sum);

  2847. }

  2848. 

  2849. void sws_subVec(SwsVector *a, SwsVector *b){

  2850.     SwsVector *diff= sws_diffVec(a, b);

  2851.     av_free(a->coeff);

  2852.     a->coeff= diff->coeff;

  2853.     a->length= diff->length;

  2854.     av_free(diff);

  2855. }

  2856. 

  2857. void sws_convVec(SwsVector *a, SwsVector *b){

  2858.     SwsVector *conv= sws_getConvVec(a, b);

  2859.     av_free(a->coeff);

  2860.     a->coeff= conv->coeff;

  2861.     a->length= conv->length;

  2862.     av_free(conv);

  2863. }

  2864. 

  2865. SwsVector *sws_cloneVec(SwsVector *a){

  2866.     double *coeff= av_malloc(a->length*sizeof(double));

  2867.     int i;

  2868.     SwsVector *vec= av_malloc(sizeof(SwsVector));

  2869. 

  2870.     vec->coeff= coeff;

  2871.     vec->length= a->length;

  2872. 

  2873.     for (i=0; i<a->length; i++) coeff[i]= a->coeff[i];

  2874. 

  2875.     return vec;

  2876. }

  2877. 

  2878. void sws_printVec(SwsVector *a){

  2879.     int i;

  2880.     double max=0;

  2881.     double min=0;

  2882.     double range;

  2883. 

  2884.     for (i=0; i<a->length; i++)

  2885.         if (a->coeff[i]>max) max= a->coeff[i];

  2886. 

  2887.     for (i=0; i<a->length; i++)

  2888.         if (a->coeff[i]<min) min= a->coeff[i];

  2889. 

  2890.     range= max - min;

  2891. 

  2892.     for (i=0; i<a->length; i++)

  2893.     {

  2894.         int x= (int)((a->coeff[i]-min)*60.0/range +0.5);

  2895.         av_log(NULL, AV_LOG_DEBUG, "%1.3f ", a->coeff[i]);

  2896.         for (;x>0; x--) av_log(NULL, AV_LOG_DEBUG, " ");

  2897.         av_log(NULL, AV_LOG_DEBUG, "|\n");

  2898.     }

  2899. }

  2900. 

  2901. void sws_freeVec(SwsVector *a){

  2902.     if (!a) return;

  2903.     av_freep(&a->coeff);

  2904.     a->length=0;

  2905.     av_free(a);

  2906. }

  2907. 

  2908. void sws_freeFilter(SwsFilter *filter){

  2909.     if (!filter) return;

  2910. 

  2911.     if (filter->lumH) sws_freeVec(filter->lumH);

  2912.     if (filter->lumV) sws_freeVec(filter->lumV);

  2913.     if (filter->chrH) sws_freeVec(filter->chrH);

  2914.     if (filter->chrV) sws_freeVec(filter->chrV);

  2915.     av_free(filter);

  2916. }

  2917. 

  2918. 

  2919. void sws_freeContext(SwsContext *c){

  2920.     int i;

  2921.     if (!c) return;

  2922. 

  2923.     if (c->lumPixBuf)

  2924.     {

  2925.         for (i=0; i<c->vLumBufSize; i++)

  2926.             av_freep(&c->lumPixBuf[i]);

  2927.         av_freep(&c->lumPixBuf);

  2928.     }

  2929. 

  2930.     if (c->chrPixBuf)

  2931.     {

  2932.         for (i=0; i<c->vChrBufSize; i++)

  2933.             av_freep(&c->chrPixBuf[i]);

  2934.         av_freep(&c->chrPixBuf);

  2935.     }

  2936. 

  2937.     av_freep(&c->vLumFilter);

  2938.     av_freep(&c->vChrFilter);

  2939.     av_freep(&c->hLumFilter);

  2940.     av_freep(&c->hChrFilter);

  2941. #ifdef HAVE_ALTIVEC

  2942.     av_freep(&c->vYCoeffsBank);

  2943.     av_freep(&c->vCCoeffsBank);

  2944. #endif

  2945. 

  2946.     av_freep(&c->vLumFilterPos);

  2947.     av_freep(&c->vChrFilterPos);

  2948.     av_freep(&c->hLumFilterPos);

  2949.     av_freep(&c->hChrFilterPos);

  2950. 

  2951. #if defined(ARCH_X86) && defined(CONFIG_GPL)

  2952. #ifdef MAP_ANONYMOUS

  2953.     if (c->funnyYCode) munmap(c->funnyYCode, MAX_FUNNY_CODE_SIZE);

  2954.     if (c->funnyUVCode) munmap(c->funnyUVCode, MAX_FUNNY_CODE_SIZE);

  2955. #else

  2956.     av_free(c->funnyYCode);

  2957.     av_free(c->funnyUVCode);

  2958. #endif

  2959.     c->funnyYCode=NULL;

  2960.     c->funnyUVCode=NULL;

  2961. #endif /* defined(ARCH_X86) */

  2962. 

  2963.     av_freep(&c->lumMmx2Filter);

  2964.     av_freep(&c->chrMmx2Filter);

  2965.     av_freep(&c->lumMmx2FilterPos);

  2966.     av_freep(&c->chrMmx2FilterPos);

  2967.     av_freep(&c->yuvTable);

  2968. 

  2969.     av_free(c);

  2970. }

  2971. 

  2972. /**

  2973.  * Checks if context is valid or reallocs a new one instead.

  2974.  * If context is NULL, just calls sws_getContext() to get a new one.

  2975.  * Otherwise, checks if the parameters are the same already saved in context.

  2976.  * If that is the case, returns the current context.

  2977.  * Otherwise, frees context and gets a new one.

  2978.  *

  2979.  * Be warned that srcFilter, dstFilter are not checked, they are

  2980.  * asumed to remain valid.

  2981.  */

  2982. struct SwsContext *sws_getCachedContext(struct SwsContext *context,

  2983.                                         int srcW, int srcH, int srcFormat,

  2984.                                         int dstW, int dstH, int dstFormat, int flags,

  2985.                                         SwsFilter *srcFilter, SwsFilter *dstFilter, double *param)

  2986. {

  2987.     static const double default_param[2] = {SWS_PARAM_DEFAULT, SWS_PARAM_DEFAULT};

  2988. 

  2989.     if (!param)

  2990.         param = default_param;

  2991. 

  2992.     if (context) {

  2993.         if (context->srcW != srcW || context->srcH != srcH ||

  2994.             context->srcFormat != srcFormat ||

  2995.             context->dstW != dstW || context->dstH != dstH ||

  2996.             context->dstFormat != dstFormat || context->flags != flags ||

  2997.             context->param[0] != param[0] || context->param[1] != param[1])

  2998.         {

  2999.             sws_freeContext(context);

  3000.             context = NULL;

  3001.         }

  3002.     }

  3003.     if (!context) {

  3004.         return sws_getContext(srcW, srcH, srcFormat,

  3005.                               dstW, dstH, dstFormat, flags,

  3006.                               srcFilter, dstFilter, param);

  3007.     }

  3008.     return context;

  3009. }