git.sesse.net Git - ffmpeg/blob - libswscale/swscale.c

   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 St, Fifth Floor, Boston, MA 02110-1301 USA
  19  *
  20  * the C code (not assembly, mmx, ...) of this file can be used
  21  * under the LGPL license too
  22  */
  23
  24 /*
  25   supported Input formats: YV12, I420/IYUV, YUY2, UYVY, BGR32, BGR24, BGR16, BGR15, RGB32, RGB24, Y8/Y800, YVU9/IF09, PAL8
  26   supported output formats: YV12, I420/IYUV, YUY2, UYVY, {BGR,RGB}{1,4,8,15,16,24,32}, Y8/Y800, YVU9/IF09
  27   {BGR,RGB}{1,4,8,15,16} support dithering
  28
  29   unscaled special converters (YV12=I420=IYUV, Y800=Y8)
  30   YV12 -> {BGR,RGB}{1,4,8,15,16,24,32}
  31   x -> x
  32   YUV9 -> YV12
  33   YUV9/YV12 -> Y800
  34   Y800 -> YUV9/YV12
  35   BGR24 -> BGR32 & RGB24 -> RGB32
  36   BGR32 -> BGR24 & RGB32 -> RGB24
  37   BGR15 -> BGR16
  38 */
  39
  40 /*
  41 tested special converters (most are tested actually but i didnt 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 (its the yuv2rgb stuff, so it should be ok)
  50   YV12/I420 -> YV12/I420
  51   YUY2/BGR15/BGR24/BGR32/RGB24/RGB32 -> same format
  52   BGR24 -> BGR32 & RGB24 -> RGB32
  53   BGR32 -> BGR24 & RGB32 -> RGB24
  54   BGR24 -> YV12
  55 */
  56
  57 #include <inttypes.h>
  58 #include <string.h>
  59 #include <math.h>
  60 #include <stdio.h>
  61 #include <unistd.h>
  62 #include "config.h"
  63 #include <assert.h>
  64 #ifdef HAVE_SYS_MMAN_H
  65 #include <sys/mman.h>
  66 #if defined(MAP_ANON) && !defined(MAP_ANONYMOUS)
  67 #define MAP_ANONYMOUS MAP_ANON
  68 #endif
  69 #endif
  70 #include "swscale.h"
  71 #include "swscale_internal.h"
  72 #include "x86_cpu.h"
  73 #include "bswap.h"
  74 #include "rgb2rgb.h"
  75 #ifdef USE_FASTMEMCPY
  76 #include "libvo/fastmemcpy.h"
  77 #endif
  78
  79 #undef MOVNTQ
  80 #undef PAVGB
  81
  82 //#undef HAVE_MMX2
  83 //#define HAVE_3DNOW
  84 //#undef HAVE_MMX
  85 //#undef ARCH_X86
  86 //#define WORDS_BIGENDIAN
  87 #define DITHER1XBPP
  88
  89 #define FAST_BGR2YV12 // use 7 bit coeffs instead of 15bit
  90
  91 #define RET 0xC3 //near return opcode for X86
  92
  93 #ifdef MP_DEBUG
  94 #define ASSERT(x) assert(x);
  95 #else
  96 #define ASSERT(x) ;
  97 #endif
  98
  99 #ifdef M_PI
 100 #define PI M_PI
 101 #else
 102 #define PI 3.14159265358979323846
 103 #endif
 104
 105 #define isSupportedIn(x)  ((x)==PIX_FMT_YUV420P || (x)==PIX_FMT_YUYV422 || (x)==PIX_FMT_UYVY422\
 106                         || (x)==PIX_FMT_RGB32|| (x)==PIX_FMT_BGR24|| (x)==PIX_FMT_BGR565|| (x)==PIX_FMT_BGR555\
 107                         || (x)==PIX_FMT_BGR32|| (x)==PIX_FMT_RGB24|| (x)==PIX_FMT_RGB565|| (x)==PIX_FMT_RGB555\
 108                         || (x)==PIX_FMT_GRAY8 || (x)==PIX_FMT_YUV410P\
 109                         || (x)==PIX_FMT_GRAY16BE || (x)==PIX_FMT_GRAY16LE\
 110                         || (x)==PIX_FMT_YUV444P || (x)==PIX_FMT_YUV422P || (x)==PIX_FMT_YUV411P\
 111                         || (x)==PIX_FMT_PAL8 || (x)==PIX_FMT_BGR8 || (x)==PIX_FMT_RGB8\
 112                         || (x)==PIX_FMT_BGR4_BYTE  || (x)==PIX_FMT_RGB4_BYTE)
 113 #define isSupportedOut(x) ((x)==PIX_FMT_YUV420P || (x)==PIX_FMT_YUYV422 || (x)==PIX_FMT_UYVY422\
 114                         || (x)==PIX_FMT_YUV444P || (x)==PIX_FMT_YUV422P || (x)==PIX_FMT_YUV411P\
 115                         || isRGB(x) || isBGR(x)\
 116                         || (x)==PIX_FMT_NV12 || (x)==PIX_FMT_NV21\
 117                         || (x)==PIX_FMT_GRAY16BE || (x)==PIX_FMT_GRAY16LE\
 118                         || (x)==PIX_FMT_GRAY8 || (x)==PIX_FMT_YUV410P)
 119 #define isPacked(x)    ((x)==PIX_FMT_PAL8 || (x)==PIX_FMT_YUYV422 ||\
 120                         (x)==PIX_FMT_UYVY422 || isRGB(x) || isBGR(x))
 121
 122 #define RGB2YUV_SHIFT 16
 123 #define BY ((int)( 0.098*(1<<RGB2YUV_SHIFT)+0.5))
 124 #define BV ((int)(-0.071*(1<<RGB2YUV_SHIFT)+0.5))
 125 #define BU ((int)( 0.439*(1<<RGB2YUV_SHIFT)+0.5))
 126 #define GY ((int)( 0.504*(1<<RGB2YUV_SHIFT)+0.5))
 127 #define GV ((int)(-0.368*(1<<RGB2YUV_SHIFT)+0.5))
 128 #define GU ((int)(-0.291*(1<<RGB2YUV_SHIFT)+0.5))
 129 #define RY ((int)( 0.257*(1<<RGB2YUV_SHIFT)+0.5))
 130 #define RV ((int)( 0.439*(1<<RGB2YUV_SHIFT)+0.5))
 131 #define RU ((int)(-0.148*(1<<RGB2YUV_SHIFT)+0.5))
 132
 133 extern const int32_t Inverse_Table_6_9[8][4];
 134
 135 /*
 136 NOTES
 137 Special versions: fast Y 1:1 scaling (no interpolation in y direction)
 138
 139 TODO
 140 more intelligent missalignment avoidance for the horizontal scaler
 141 write special vertical cubic upscale version
 142 Optimize C code (yv12 / minmax)
 143 add support for packed pixel yuv input & output
 144 add support for Y8 output
 145 optimize bgr24 & bgr32
 146 add BGR4 output support
 147 write special BGR->BGR scaler
 148 */
 149
 150 #if defined(ARCH_X86) && defined (CONFIG_GPL)
 151 static uint64_t attribute_used __attribute__((aligned(8))) bF8=       0xF8F8F8F8F8F8F8F8LL;
 152 static uint64_t attribute_used __attribute__((aligned(8))) bFC=       0xFCFCFCFCFCFCFCFCLL;
 153 static uint64_t __attribute__((aligned(8))) w10=       0x0010001000100010LL;
 154 static uint64_t attribute_used __attribute__((aligned(8))) w02=       0x0002000200020002LL;
 155 static uint64_t attribute_used __attribute__((aligned(8))) bm00001111=0x00000000FFFFFFFFLL;
 156 static uint64_t attribute_used __attribute__((aligned(8))) bm00000111=0x0000000000FFFFFFLL;
 157 static uint64_t attribute_used __attribute__((aligned(8))) bm11111000=0xFFFFFFFFFF000000LL;
 158 static uint64_t attribute_used __attribute__((aligned(8))) bm01010101=0x00FF00FF00FF00FFLL;
 159
 160 static volatile uint64_t attribute_used __attribute__((aligned(8))) b5Dither;
 161 static volatile uint64_t attribute_used __attribute__((aligned(8))) g5Dither;
 162 static volatile uint64_t attribute_used __attribute__((aligned(8))) g6Dither;
 163 static volatile uint64_t attribute_used __attribute__((aligned(8))) r5Dither;
 164
 165 static uint64_t __attribute__((aligned(8))) dither4[2]={
 166         0x0103010301030103LL,
 167         0x0200020002000200LL,};
 168
 169 static uint64_t __attribute__((aligned(8))) dither8[2]={
 170         0x0602060206020602LL,
 171         0x0004000400040004LL,};
 172
 173 static uint64_t __attribute__((aligned(8))) b16Mask=   0x001F001F001F001FLL;
 174 static uint64_t attribute_used __attribute__((aligned(8))) g16Mask=   0x07E007E007E007E0LL;
 175 static uint64_t attribute_used __attribute__((aligned(8))) r16Mask=   0xF800F800F800F800LL;
 176 static uint64_t __attribute__((aligned(8))) b15Mask=   0x001F001F001F001FLL;
 177 static uint64_t attribute_used __attribute__((aligned(8))) g15Mask=   0x03E003E003E003E0LL;
 178 static uint64_t attribute_used __attribute__((aligned(8))) r15Mask=   0x7C007C007C007C00LL;
 179
 180 static uint64_t attribute_used __attribute__((aligned(8))) M24A=   0x00FF0000FF0000FFLL;
 181 static uint64_t attribute_used __attribute__((aligned(8))) M24B=   0xFF0000FF0000FF00LL;
 182 static uint64_t attribute_used __attribute__((aligned(8))) M24C=   0x0000FF0000FF0000LL;
 183
 184 #ifdef FAST_BGR2YV12
 185 static const uint64_t bgr2YCoeff  attribute_used __attribute__((aligned(8))) = 0x000000210041000DULL;
 186 static const uint64_t bgr2UCoeff  attribute_used __attribute__((aligned(8))) = 0x0000FFEEFFDC0038ULL;
 187 static const uint64_t bgr2VCoeff  attribute_used __attribute__((aligned(8))) = 0x00000038FFD2FFF8ULL;
 188 #else
 189 static const uint64_t bgr2YCoeff  attribute_used __attribute__((aligned(8))) = 0x000020E540830C8BULL;
 190 static const uint64_t bgr2UCoeff  attribute_used __attribute__((aligned(8))) = 0x0000ED0FDAC23831ULL;
 191 static const uint64_t bgr2VCoeff  attribute_used __attribute__((aligned(8))) = 0x00003831D0E6F6EAULL;
 192 #endif /* FAST_BGR2YV12 */
 193 static const uint64_t bgr2YOffset attribute_used __attribute__((aligned(8))) = 0x1010101010101010ULL;
 194 static const uint64_t bgr2UVOffset attribute_used __attribute__((aligned(8)))= 0x8080808080808080ULL;
 195 static const uint64_t w1111       attribute_used __attribute__((aligned(8))) = 0x0001000100010001ULL;
 196 #endif /* defined(ARCH_X86) */
 197
 198 // clipping helper table for C implementations:
 199 static unsigned char clip_table[768];
 200
 201 static SwsVector *sws_getConvVec(SwsVector *a, SwsVector *b);
 202
 203 extern const uint8_t dither_2x2_4[2][8];
 204 extern const uint8_t dither_2x2_8[2][8];
 205 extern const uint8_t dither_8x8_32[8][8];
 206 extern const uint8_t dither_8x8_73[8][8];
 207 extern const uint8_t dither_8x8_220[8][8];
 208
 209 static const char * sws_context_to_name(void * ptr) {
 210     return "swscaler";
 211 }
 212
 213 static AVClass sws_context_class = { "SWScaler", sws_context_to_name, NULL };
 214
 215 char *sws_format_name(enum PixelFormat format)
 216 {
 217     switch (format) {
 218         case PIX_FMT_YUV420P:
 219             return "yuv420p";
 220         case PIX_FMT_YUYV422:
 221             return "yuyv422";
 222         case PIX_FMT_RGB24:
 223             return "rgb24";
 224         case PIX_FMT_BGR24:
 225             return "bgr24";
 226         case PIX_FMT_YUV422P:
 227             return "yuv422p";
 228         case PIX_FMT_YUV444P:
 229             return "yuv444p";
 230         case PIX_FMT_RGB32:
 231             return "rgb32";
 232         case PIX_FMT_YUV410P:
 233             return "yuv410p";
 234         case PIX_FMT_YUV411P:
 235             return "yuv411p";
 236         case PIX_FMT_RGB565:
 237             return "rgb565";
 238         case PIX_FMT_RGB555:
 239             return "rgb555";
 240         case PIX_FMT_GRAY16BE:
 241             return "gray16be";
 242         case PIX_FMT_GRAY16LE:
 243             return "gray16le";
 244         case PIX_FMT_GRAY8:
 245             return "gray8";
 246         case PIX_FMT_MONOWHITE:
 247             return "mono white";
 248         case PIX_FMT_MONOBLACK:
 249             return "mono black";
 250         case PIX_FMT_PAL8:
 251             return "Palette";
 252         case PIX_FMT_YUVJ420P:
 253             return "yuvj420p";
 254         case PIX_FMT_YUVJ422P:
 255             return "yuvj422p";
 256         case PIX_FMT_YUVJ444P:
 257             return "yuvj444p";
 258         case PIX_FMT_XVMC_MPEG2_MC:
 259             return "xvmc_mpeg2_mc";
 260         case PIX_FMT_XVMC_MPEG2_IDCT:
 261             return "xvmc_mpeg2_idct";
 262         case PIX_FMT_UYVY422:
 263             return "uyvy422";
 264         case PIX_FMT_UYYVYY411:
 265             return "uyyvyy411";
 266         case PIX_FMT_RGB32_1:
 267             return "rgb32x";
 268         case PIX_FMT_BGR32_1:
 269             return "bgr32x";
 270         case PIX_FMT_BGR32:
 271             return "bgr32";
 272         case PIX_FMT_BGR565:
 273             return "bgr565";
 274         case PIX_FMT_BGR555:
 275             return "bgr555";
 276         case PIX_FMT_BGR8:
 277             return "bgr8";
 278         case PIX_FMT_BGR4:
 279             return "bgr4";
 280         case PIX_FMT_BGR4_BYTE:
 281             return "bgr4 byte";
 282         case PIX_FMT_RGB8:
 283             return "rgb8";
 284         case PIX_FMT_RGB4:
 285             return "rgb4";
 286         case PIX_FMT_RGB4_BYTE:
 287             return "rgb4 byte";
 288         case PIX_FMT_NV12:
 289             return "nv12";
 290         case PIX_FMT_NV21:
 291             return "nv21";
 292         default:
 293             return "Unknown format";
 294     }
 295 }
 296
 297 #if defined(ARCH_X86) && defined (CONFIG_GPL)
 298 void in_asm_used_var_warning_killer()
 299 {
 300  volatile int i= bF8+bFC+w10+
 301  bm00001111+bm00000111+bm11111000+b16Mask+g16Mask+r16Mask+b15Mask+g15Mask+r15Mask+
 302  M24A+M24B+M24C+w02 + b5Dither+g5Dither+r5Dither+g6Dither+dither4[0]+dither8[0]+bm01010101;
 303  if(i) i=0;
 304 }
 305 #endif
 306
 307 static inline void yuv2yuvXinC(int16_t *lumFilter, int16_t **lumSrc, int lumFilterSize,
 308                                     int16_t *chrFilter, int16_t **chrSrc, int chrFilterSize,
 309                                     uint8_t *dest, uint8_t *uDest, uint8_t *vDest, int dstW, int chrDstW)
 310 {
 311         //FIXME Optimize (just quickly writen not opti..)
 312         int i;
 313         for(i=0; i<dstW; i++)
 314         {
 315                 int val=1<<18;
 316                 int j;
 317                 for(j=0; j<lumFilterSize; j++)
 318                         val += lumSrc[j][i] * lumFilter[j];
 319
 320                 dest[i]= av_clip_uint8(val>>19);
 321         }
 322
 323         if(uDest != NULL)
 324                 for(i=0; i<chrDstW; i++)
 325                 {
 326                         int u=1<<18;
 327                         int v=1<<18;
 328                         int j;
 329                         for(j=0; j<chrFilterSize; j++)
 330                         {
 331                                 u += chrSrc[j][i] * chrFilter[j];
 332                                 v += chrSrc[j][i + 2048] * chrFilter[j];
 333                         }
 334
 335                         uDest[i]= av_clip_uint8(u>>19);
 336                         vDest[i]= av_clip_uint8(v>>19);
 337                 }
 338 }
 339
 340 static inline void yuv2nv12XinC(int16_t *lumFilter, int16_t **lumSrc, int lumFilterSize,
 341                                 int16_t *chrFilter, int16_t **chrSrc, int chrFilterSize,
 342                                 uint8_t *dest, uint8_t *uDest, int dstW, int chrDstW, int dstFormat)
 343 {
 344         //FIXME Optimize (just quickly writen not opti..)
 345         int i;
 346         for(i=0; i<dstW; i++)
 347         {
 348                 int val=1<<18;
 349                 int j;
 350                 for(j=0; j<lumFilterSize; j++)
 351                         val += lumSrc[j][i] * lumFilter[j];
 352
 353                 dest[i]= av_clip_uint8(val>>19);
 354         }
 355
 356         if(uDest == NULL)
 357                 return;
 358
 359         if(dstFormat == PIX_FMT_NV12)
 360                 for(i=0; i<chrDstW; i++)
 361                 {
 362                         int u=1<<18;
 363                         int v=1<<18;
 364                         int j;
 365                         for(j=0; j<chrFilterSize; j++)
 366                         {
 367                                 u += chrSrc[j][i] * chrFilter[j];
 368                                 v += chrSrc[j][i + 2048] * chrFilter[j];
 369                         }
 370
 371                         uDest[2*i]= av_clip_uint8(u>>19);
 372                         uDest[2*i+1]= av_clip_uint8(v>>19);
 373                 }
 374         else
 375                 for(i=0; i<chrDstW; i++)
 376                 {
 377                         int u=1<<18;
 378                         int v=1<<18;
 379                         int j;
 380                         for(j=0; j<chrFilterSize; j++)
 381                         {
 382                                 u += chrSrc[j][i] * chrFilter[j];
 383                                 v += chrSrc[j][i + 2048] * chrFilter[j];
 384                         }
 385
 386                         uDest[2*i]= av_clip_uint8(v>>19);
 387                         uDest[2*i+1]= av_clip_uint8(u>>19);
 388                 }
 389 }
 390
 391 #define YSCALE_YUV_2_PACKEDX_C(type) \
 392                 for(i=0; i<(dstW>>1); i++){\
 393                         int j;\
 394                         int Y1=1<<18;\
 395                         int Y2=1<<18;\
 396                         int U=1<<18;\
 397                         int V=1<<18;\
 398                         type attribute_unused *r, *b, *g;\
 399                         const int i2= 2*i;\
 400                         \
 401                         for(j=0; j<lumFilterSize; j++)\
 402                         {\
 403                                 Y1 += lumSrc[j][i2] * lumFilter[j];\
 404                                 Y2 += lumSrc[j][i2+1] * lumFilter[j];\
 405                         }\
 406                         for(j=0; j<chrFilterSize; j++)\
 407                         {\
 408                                 U += chrSrc[j][i] * chrFilter[j];\
 409                                 V += chrSrc[j][i+2048] * chrFilter[j];\
 410                         }\
 411                         Y1>>=19;\
 412                         Y2>>=19;\
 413                         U >>=19;\
 414                         V >>=19;\
 415                         if((Y1|Y2|U|V)&256)\
 416                         {\
 417                                 if(Y1>255)   Y1=255;\
 418                                 else if(Y1<0)Y1=0;\
 419                                 if(Y2>255)   Y2=255;\
 420                                 else if(Y2<0)Y2=0;\
 421                                 if(U>255)    U=255;\
 422                                 else if(U<0) U=0;\
 423                                 if(V>255)    V=255;\
 424                                 else if(V<0) V=0;\
 425                         }
 426
 427 #define YSCALE_YUV_2_RGBX_C(type) \
 428                         YSCALE_YUV_2_PACKEDX_C(type)\
 429                         r = (type *)c->table_rV[V];\
 430                         g = (type *)(c->table_gU[U] + c->table_gV[V]);\
 431                         b = (type *)c->table_bU[U];\
 432
 433 #define YSCALE_YUV_2_PACKED2_C \
 434                 for(i=0; i<(dstW>>1); i++){\
 435                         const int i2= 2*i;\
 436                         int Y1= (buf0[i2  ]*yalpha1+buf1[i2  ]*yalpha)>>19;\
 437                         int Y2= (buf0[i2+1]*yalpha1+buf1[i2+1]*yalpha)>>19;\
 438                         int U= (uvbuf0[i     ]*uvalpha1+uvbuf1[i     ]*uvalpha)>>19;\
 439                         int V= (uvbuf0[i+2048]*uvalpha1+uvbuf1[i+2048]*uvalpha)>>19;\
 440
 441 #define YSCALE_YUV_2_RGB2_C(type) \
 442                         YSCALE_YUV_2_PACKED2_C\
 443                         type *r, *b, *g;\
 444                         r = (type *)c->table_rV[V];\
 445                         g = (type *)(c->table_gU[U] + c->table_gV[V]);\
 446                         b = (type *)c->table_bU[U];\
 447
 448 #define YSCALE_YUV_2_PACKED1_C \
 449                 for(i=0; i<(dstW>>1); i++){\
 450                         const int i2= 2*i;\
 451                         int Y1= buf0[i2  ]>>7;\
 452                         int Y2= buf0[i2+1]>>7;\
 453                         int U= (uvbuf1[i     ])>>7;\
 454                         int V= (uvbuf1[i+2048])>>7;\
 455
 456 #define YSCALE_YUV_2_RGB1_C(type) \
 457                         YSCALE_YUV_2_PACKED1_C\
 458                         type *r, *b, *g;\
 459                         r = (type *)c->table_rV[V];\
 460                         g = (type *)(c->table_gU[U] + c->table_gV[V]);\
 461                         b = (type *)c->table_bU[U];\
 462
 463 #define YSCALE_YUV_2_PACKED1B_C \
 464                 for(i=0; i<(dstW>>1); i++){\
 465                         const int i2= 2*i;\
 466                         int Y1= buf0[i2  ]>>7;\
 467                         int Y2= buf0[i2+1]>>7;\
 468                         int U= (uvbuf0[i     ] + uvbuf1[i     ])>>8;\
 469                         int V= (uvbuf0[i+2048] + uvbuf1[i+2048])>>8;\
 470
 471 #define YSCALE_YUV_2_RGB1B_C(type) \
 472                         YSCALE_YUV_2_PACKED1B_C\
 473                         type *r, *b, *g;\
 474                         r = (type *)c->table_rV[V];\
 475                         g = (type *)(c->table_gU[U] + c->table_gV[V]);\
 476                         b = (type *)c->table_bU[U];\
 477
 478 #define YSCALE_YUV_2_ANYRGB_C(func, func2)\
 479         switch(c->dstFormat)\
 480         {\
 481         case PIX_FMT_RGB32:\
 482         case PIX_FMT_BGR32:\
 483                 func(uint32_t)\
 484                         ((uint32_t*)dest)[i2+0]= r[Y1] + g[Y1] + b[Y1];\
 485                         ((uint32_t*)dest)[i2+1]= r[Y2] + g[Y2] + b[Y2];\
 486                 }               \
 487                 break;\
 488         case PIX_FMT_RGB24:\
 489                 func(uint8_t)\
 490                         ((uint8_t*)dest)[0]= r[Y1];\
 491                         ((uint8_t*)dest)[1]= g[Y1];\
 492                         ((uint8_t*)dest)[2]= b[Y1];\
 493                         ((uint8_t*)dest)[3]= r[Y2];\
 494                         ((uint8_t*)dest)[4]= g[Y2];\
 495                         ((uint8_t*)dest)[5]= b[Y2];\
 496                         dest+=6;\
 497                 }\
 498                 break;\
 499         case PIX_FMT_BGR24:\
 500                 func(uint8_t)\
 501                         ((uint8_t*)dest)[0]= b[Y1];\
 502                         ((uint8_t*)dest)[1]= g[Y1];\
 503                         ((uint8_t*)dest)[2]= r[Y1];\
 504                         ((uint8_t*)dest)[3]= b[Y2];\
 505                         ((uint8_t*)dest)[4]= g[Y2];\
 506                         ((uint8_t*)dest)[5]= r[Y2];\
 507                         dest+=6;\
 508                 }\
 509                 break;\
 510         case PIX_FMT_RGB565:\
 511         case PIX_FMT_BGR565:\
 512                 {\
 513                         const int dr1= dither_2x2_8[y&1    ][0];\
 514                         const int dg1= dither_2x2_4[y&1    ][0];\
 515                         const int db1= dither_2x2_8[(y&1)^1][0];\
 516                         const int dr2= dither_2x2_8[y&1    ][1];\
 517                         const int dg2= dither_2x2_4[y&1    ][1];\
 518                         const int db2= dither_2x2_8[(y&1)^1][1];\
 519                         func(uint16_t)\
 520                                 ((uint16_t*)dest)[i2+0]= r[Y1+dr1] + g[Y1+dg1] + b[Y1+db1];\
 521                                 ((uint16_t*)dest)[i2+1]= r[Y2+dr2] + g[Y2+dg2] + b[Y2+db2];\
 522                         }\
 523                 }\
 524                 break;\
 525         case PIX_FMT_RGB555:\
 526         case PIX_FMT_BGR555:\
 527                 {\
 528                         const int dr1= dither_2x2_8[y&1    ][0];\
 529                         const int dg1= dither_2x2_8[y&1    ][1];\
 530                         const int db1= dither_2x2_8[(y&1)^1][0];\
 531                         const int dr2= dither_2x2_8[y&1    ][1];\
 532                         const int dg2= dither_2x2_8[y&1    ][0];\
 533                         const int db2= dither_2x2_8[(y&1)^1][1];\
 534                         func(uint16_t)\
 535                                 ((uint16_t*)dest)[i2+0]= r[Y1+dr1] + g[Y1+dg1] + b[Y1+db1];\
 536                                 ((uint16_t*)dest)[i2+1]= r[Y2+dr2] + g[Y2+dg2] + b[Y2+db2];\
 537                         }\
 538                 }\
 539                 break;\
 540         case PIX_FMT_RGB8:\
 541         case PIX_FMT_BGR8:\
 542                 {\
 543                         const uint8_t * const d64= dither_8x8_73[y&7];\
 544                         const uint8_t * const d32= dither_8x8_32[y&7];\
 545                         func(uint8_t)\
 546                                 ((uint8_t*)dest)[i2+0]= r[Y1+d32[(i2+0)&7]] + g[Y1+d32[(i2+0)&7]] + b[Y1+d64[(i2+0)&7]];\
 547                                 ((uint8_t*)dest)[i2+1]= r[Y2+d32[(i2+1)&7]] + g[Y2+d32[(i2+1)&7]] + b[Y2+d64[(i2+1)&7]];\
 548                         }\
 549                 }\
 550                 break;\
 551         case PIX_FMT_RGB4:\
 552         case PIX_FMT_BGR4:\
 553                 {\
 554                         const uint8_t * const d64= dither_8x8_73 [y&7];\
 555                         const uint8_t * const d128=dither_8x8_220[y&7];\
 556                         func(uint8_t)\
 557                                 ((uint8_t*)dest)[i]= r[Y1+d128[(i2+0)&7]] + g[Y1+d64[(i2+0)&7]] + b[Y1+d128[(i2+0)&7]]\
 558                                                  + ((r[Y2+d128[(i2+1)&7]] + g[Y2+d64[(i2+1)&7]] + b[Y2+d128[(i2+1)&7]])<<4);\
 559                         }\
 560                 }\
 561                 break;\
 562         case PIX_FMT_RGB4_BYTE:\
 563         case PIX_FMT_BGR4_BYTE:\
 564                 {\
 565                         const uint8_t * const d64= dither_8x8_73 [y&7];\
 566                         const uint8_t * const d128=dither_8x8_220[y&7];\
 567                         func(uint8_t)\
 568                                 ((uint8_t*)dest)[i2+0]= r[Y1+d128[(i2+0)&7]] + g[Y1+d64[(i2+0)&7]] + b[Y1+d128[(i2+0)&7]];\
 569                                 ((uint8_t*)dest)[i2+1]= r[Y2+d128[(i2+1)&7]] + g[Y2+d64[(i2+1)&7]] + b[Y2+d128[(i2+1)&7]];\
 570                         }\
 571                 }\
 572                 break;\
 573         case PIX_FMT_MONOBLACK:\
 574                 {\
 575                         const uint8_t * const d128=dither_8x8_220[y&7];\
 576                         uint8_t *g= c->table_gU[128] + c->table_gV[128];\
 577                         for(i=0; i<dstW-7; i+=8){\
 578                                 int acc;\
 579                                 acc =       g[((buf0[i  ]*yalpha1+buf1[i  ]*yalpha)>>19) + d128[0]];\
 580                                 acc+= acc + g[((buf0[i+1]*yalpha1+buf1[i+1]*yalpha)>>19) + d128[1]];\
 581                                 acc+= acc + g[((buf0[i+2]*yalpha1+buf1[i+2]*yalpha)>>19) + d128[2]];\
 582                                 acc+= acc + g[((buf0[i+3]*yalpha1+buf1[i+3]*yalpha)>>19) + d128[3]];\
 583                                 acc+= acc + g[((buf0[i+4]*yalpha1+buf1[i+4]*yalpha)>>19) + d128[4]];\
 584                                 acc+= acc + g[((buf0[i+5]*yalpha1+buf1[i+5]*yalpha)>>19) + d128[5]];\
 585                                 acc+= acc + g[((buf0[i+6]*yalpha1+buf1[i+6]*yalpha)>>19) + d128[6]];\
 586                                 acc+= acc + g[((buf0[i+7]*yalpha1+buf1[i+7]*yalpha)>>19) + d128[7]];\
 587                                 ((uint8_t*)dest)[0]= acc;\
 588                                 dest++;\
 589                         }\
 590 \
 591 /*\
 592 ((uint8_t*)dest)-= dstW>>4;\
 593 {\
 594                         int acc=0;\
 595                         int left=0;\
 596                         static int top[1024];\
 597                         static int last_new[1024][1024];\
 598                         static int last_in3[1024][1024];\
 599                         static int drift[1024][1024];\
 600                         int topLeft=0;\
 601                         int shift=0;\
 602                         int count=0;\
 603                         const uint8_t * const d128=dither_8x8_220[y&7];\
 604                         int error_new=0;\
 605                         int error_in3=0;\
 606                         int f=0;\
 607                         \
 608                         for(i=dstW>>1; i<dstW; i++){\
 609                                 int in= ((buf0[i  ]*yalpha1+buf1[i  ]*yalpha)>>19);\
 610                                 int in2 = (76309 * (in - 16) + 32768) >> 16;\
 611                                 int in3 = (in2 < 0) ? 0 : ((in2 > 255) ? 255 : in2);\
 612                                 int old= (left*7 + topLeft + top[i]*5 + top[i+1]*3)/20 + in3\
 613                                         + (last_new[y][i] - in3)*f/256;\
 614                                 int new= old> 128 ? 255 : 0;\
 615 \
 616                                 error_new+= FFABS(last_new[y][i] - new);\
 617                                 error_in3+= FFABS(last_in3[y][i] - in3);\
 618                                 f= error_new - error_in3*4;\
 619                                 if(f<0) f=0;\
 620                                 if(f>256) f=256;\
 621 \
 622                                 topLeft= top[i];\
 623                                 left= top[i]= old - new;\
 624                                 last_new[y][i]= new;\
 625                                 last_in3[y][i]= in3;\
 626 \
 627                                 acc+= acc + (new&1);\
 628                                 if((i&7)==6){\
 629                                         ((uint8_t*)dest)[0]= acc;\
 630                                         ((uint8_t*)dest)++;\
 631                                 }\
 632                         }\
 633 }\
 634 */\
 635                 }\
 636                 break;\
 637         case PIX_FMT_YUYV422:\
 638                 func2\
 639                         ((uint8_t*)dest)[2*i2+0]= Y1;\
 640                         ((uint8_t*)dest)[2*i2+1]= U;\
 641                         ((uint8_t*)dest)[2*i2+2]= Y2;\
 642                         ((uint8_t*)dest)[2*i2+3]= V;\
 643                 }               \
 644                 break;\
 645         case PIX_FMT_UYVY422:\
 646                 func2\
 647                         ((uint8_t*)dest)[2*i2+0]= U;\
 648                         ((uint8_t*)dest)[2*i2+1]= Y1;\
 649                         ((uint8_t*)dest)[2*i2+2]= V;\
 650                         ((uint8_t*)dest)[2*i2+3]= Y2;\
 651                 }               \
 652                 break;\
 653         }\
 654
 655
 656 static inline void yuv2packedXinC(SwsContext *c, int16_t *lumFilter, int16_t **lumSrc, int lumFilterSize,
 657                                     int16_t *chrFilter, int16_t **chrSrc, int chrFilterSize,
 658                                     uint8_t *dest, int dstW, int y)
 659 {
 660         int i;
 661         switch(c->dstFormat)
 662         {
 663         case PIX_FMT_BGR32:
 664         case PIX_FMT_RGB32:
 665                 YSCALE_YUV_2_RGBX_C(uint32_t)
 666                         ((uint32_t*)dest)[i2+0]= r[Y1] + g[Y1] + b[Y1];
 667                         ((uint32_t*)dest)[i2+1]= r[Y2] + g[Y2] + b[Y2];
 668                 }
 669                 break;
 670         case PIX_FMT_RGB24:
 671                 YSCALE_YUV_2_RGBX_C(uint8_t)
 672                         ((uint8_t*)dest)[0]= r[Y1];
 673                         ((uint8_t*)dest)[1]= g[Y1];
 674                         ((uint8_t*)dest)[2]= b[Y1];
 675                         ((uint8_t*)dest)[3]= r[Y2];
 676                         ((uint8_t*)dest)[4]= g[Y2];
 677                         ((uint8_t*)dest)[5]= b[Y2];
 678                         dest+=6;
 679                 }
 680                 break;
 681         case PIX_FMT_BGR24:
 682                 YSCALE_YUV_2_RGBX_C(uint8_t)
 683                         ((uint8_t*)dest)[0]= b[Y1];
 684                         ((uint8_t*)dest)[1]= g[Y1];
 685                         ((uint8_t*)dest)[2]= r[Y1];
 686                         ((uint8_t*)dest)[3]= b[Y2];
 687                         ((uint8_t*)dest)[4]= g[Y2];
 688                         ((uint8_t*)dest)[5]= r[Y2];
 689                         dest+=6;
 690                 }
 691                 break;
 692         case PIX_FMT_RGB565:
 693         case PIX_FMT_BGR565:
 694                 {
 695                         const int dr1= dither_2x2_8[y&1    ][0];
 696                         const int dg1= dither_2x2_4[y&1    ][0];
 697                         const int db1= dither_2x2_8[(y&1)^1][0];
 698                         const int dr2= dither_2x2_8[y&1    ][1];
 699                         const int dg2= dither_2x2_4[y&1    ][1];
 700                         const int db2= dither_2x2_8[(y&1)^1][1];
 701                         YSCALE_YUV_2_RGBX_C(uint16_t)
 702                                 ((uint16_t*)dest)[i2+0]= r[Y1+dr1] + g[Y1+dg1] + b[Y1+db1];
 703                                 ((uint16_t*)dest)[i2+1]= r[Y2+dr2] + g[Y2+dg2] + b[Y2+db2];
 704                         }
 705                 }
 706                 break;
 707         case PIX_FMT_RGB555:
 708         case PIX_FMT_BGR555:
 709                 {
 710                         const int dr1= dither_2x2_8[y&1    ][0];
 711                         const int dg1= dither_2x2_8[y&1    ][1];
 712                         const int db1= dither_2x2_8[(y&1)^1][0];
 713                         const int dr2= dither_2x2_8[y&1    ][1];
 714                         const int dg2= dither_2x2_8[y&1    ][0];
 715                         const int db2= dither_2x2_8[(y&1)^1][1];
 716                         YSCALE_YUV_2_RGBX_C(uint16_t)
 717                                 ((uint16_t*)dest)[i2+0]= r[Y1+dr1] + g[Y1+dg1] + b[Y1+db1];
 718                                 ((uint16_t*)dest)[i2+1]= r[Y2+dr2] + g[Y2+dg2] + b[Y2+db2];
 719                         }
 720                 }
 721                 break;
 722         case PIX_FMT_RGB8:
 723         case PIX_FMT_BGR8:
 724                 {
 725                         const uint8_t * const d64= dither_8x8_73[y&7];
 726                         const uint8_t * const d32= dither_8x8_32[y&7];
 727                         YSCALE_YUV_2_RGBX_C(uint8_t)
 728                                 ((uint8_t*)dest)[i2+0]= r[Y1+d32[(i2+0)&7]] + g[Y1+d32[(i2+0)&7]] + b[Y1+d64[(i2+0)&7]];
 729                                 ((uint8_t*)dest)[i2+1]= r[Y2+d32[(i2+1)&7]] + g[Y2+d32[(i2+1)&7]] + b[Y2+d64[(i2+1)&7]];
 730                         }
 731                 }
 732                 break;
 733         case PIX_FMT_RGB4:
 734         case PIX_FMT_BGR4:
 735                 {
 736                         const uint8_t * const d64= dither_8x8_73 [y&7];
 737                         const uint8_t * const d128=dither_8x8_220[y&7];
 738                         YSCALE_YUV_2_RGBX_C(uint8_t)
 739                                 ((uint8_t*)dest)[i]= r[Y1+d128[(i2+0)&7]] + g[Y1+d64[(i2+0)&7]] + b[Y1+d128[(i2+0)&7]]
 740                                                   +((r[Y2+d128[(i2+1)&7]] + g[Y2+d64[(i2+1)&7]] + b[Y2+d128[(i2+1)&7]])<<4);
 741                         }
 742                 }
 743                 break;
 744         case PIX_FMT_RGB4_BYTE:
 745         case PIX_FMT_BGR4_BYTE:
 746                 {
 747                         const uint8_t * const d64= dither_8x8_73 [y&7];
 748                         const uint8_t * const d128=dither_8x8_220[y&7];
 749                         YSCALE_YUV_2_RGBX_C(uint8_t)
 750                                 ((uint8_t*)dest)[i2+0]= r[Y1+d128[(i2+0)&7]] + g[Y1+d64[(i2+0)&7]] + b[Y1+d128[(i2+0)&7]];
 751                                 ((uint8_t*)dest)[i2+1]= r[Y2+d128[(i2+1)&7]] + g[Y2+d64[(i2+1)&7]] + b[Y2+d128[(i2+1)&7]];
 752                         }
 753                 }
 754                 break;
 755         case PIX_FMT_MONOBLACK:
 756                 {
 757                         const uint8_t * const d128=dither_8x8_220[y&7];
 758                         uint8_t *g= c->table_gU[128] + c->table_gV[128];
 759                         int acc=0;
 760                         for(i=0; i<dstW-1; i+=2){
 761                                 int j;
 762                                 int Y1=1<<18;
 763                                 int Y2=1<<18;
 764
 765                                 for(j=0; j<lumFilterSize; j++)
 766                                 {
 767                                         Y1 += lumSrc[j][i] * lumFilter[j];
 768                                         Y2 += lumSrc[j][i+1] * lumFilter[j];
 769                                 }
 770                                 Y1>>=19;
 771                                 Y2>>=19;
 772                                 if((Y1|Y2)&256)
 773                                 {
 774                                         if(Y1>255)   Y1=255;
 775                                         else if(Y1<0)Y1=0;
 776                                         if(Y2>255)   Y2=255;
 777                                         else if(Y2<0)Y2=0;
 778                                 }
 779                                 acc+= acc + g[Y1+d128[(i+0)&7]];
 780                                 acc+= acc + g[Y2+d128[(i+1)&7]];
 781                                 if((i&7)==6){
 782                                         ((uint8_t*)dest)[0]= acc;
 783                                         dest++;
 784                                 }
 785                         }
 786                 }
 787                 break;
 788         case PIX_FMT_YUYV422:
 789                 YSCALE_YUV_2_PACKEDX_C(void)
 790                         ((uint8_t*)dest)[2*i2+0]= Y1;
 791                         ((uint8_t*)dest)[2*i2+1]= U;
 792                         ((uint8_t*)dest)[2*i2+2]= Y2;
 793                         ((uint8_t*)dest)[2*i2+3]= V;
 794                 }
 795                 break;
 796         case PIX_FMT_UYVY422:
 797                 YSCALE_YUV_2_PACKEDX_C(void)
 798                         ((uint8_t*)dest)[2*i2+0]= U;
 799                         ((uint8_t*)dest)[2*i2+1]= Y1;
 800                         ((uint8_t*)dest)[2*i2+2]= V;
 801                         ((uint8_t*)dest)[2*i2+3]= Y2;
 802                 }
 803                 break;
 804         }
 805 }
 806
 807
 808 //Note: we have C, X86, MMX, MMX2, 3DNOW version therse no 3DNOW+MMX2 one
 809 //Plain C versions
 810 #if !defined (HAVE_MMX) || defined (RUNTIME_CPUDETECT) || !defined(CONFIG_GPL)
 811 #define COMPILE_C
 812 #endif
 813
 814 #ifdef ARCH_POWERPC
 815 #if (defined (HAVE_ALTIVEC) || defined (RUNTIME_CPUDETECT)) && defined (CONFIG_GPL)
 816 #define COMPILE_ALTIVEC
 817 #endif //HAVE_ALTIVEC
 818 #endif //ARCH_POWERPC
 819
 820 #if defined(ARCH_X86)
 821
 822 #if ((defined (HAVE_MMX) && !defined (HAVE_3DNOW) && !defined (HAVE_MMX2)) || defined (RUNTIME_CPUDETECT)) && defined (CONFIG_GPL)
 823 #define COMPILE_MMX
 824 #endif
 825
 826 #if (defined (HAVE_MMX2) || defined (RUNTIME_CPUDETECT)) && defined (CONFIG_GPL)
 827 #define COMPILE_MMX2
 828 #endif
 829
 830 #if ((defined (HAVE_3DNOW) && !defined (HAVE_MMX2)) || defined (RUNTIME_CPUDETECT)) && defined (CONFIG_GPL)
 831 #define COMPILE_3DNOW
 832 #endif
 833 #endif //ARCH_X86 || ARCH_X86_64
 834
 835 #undef HAVE_MMX
 836 #undef HAVE_MMX2
 837 #undef HAVE_3DNOW
 838
 839 #ifdef COMPILE_C
 840 #undef HAVE_MMX
 841 #undef HAVE_MMX2
 842 #undef HAVE_3DNOW
 843 #undef HAVE_ALTIVEC
 844 #define RENAME(a) a ## _C
 845 #include "swscale_template.c"
 846 #endif
 847
 848 #ifdef ARCH_POWERPC
 849 #ifdef COMPILE_ALTIVEC
 850 #undef RENAME
 851 #define HAVE_ALTIVEC
 852 #define RENAME(a) a ## _altivec
 853 #include "swscale_template.c"
 854 #endif
 855 #endif //ARCH_POWERPC
 856
 857 #if defined(ARCH_X86)
 858
 859 //X86 versions
 860 /*
 861 #undef RENAME
 862 #undef HAVE_MMX
 863 #undef HAVE_MMX2
 864 #undef HAVE_3DNOW
 865 #define ARCH_X86
 866 #define RENAME(a) a ## _X86
 867 #include "swscale_template.c"
 868 */
 869 //MMX versions
 870 #ifdef COMPILE_MMX
 871 #undef RENAME
 872 #define HAVE_MMX
 873 #undef HAVE_MMX2
 874 #undef HAVE_3DNOW
 875 #define RENAME(a) a ## _MMX
 876 #include "swscale_template.c"
 877 #endif
 878
 879 //MMX2 versions
 880 #ifdef COMPILE_MMX2
 881 #undef RENAME
 882 #define HAVE_MMX
 883 #define HAVE_MMX2
 884 #undef HAVE_3DNOW
 885 #define RENAME(a) a ## _MMX2
 886 #include "swscale_template.c"
 887 #endif
 888
 889 //3DNOW versions
 890 #ifdef COMPILE_3DNOW
 891 #undef RENAME
 892 #define HAVE_MMX
 893 #undef HAVE_MMX2
 894 #define HAVE_3DNOW
 895 #define RENAME(a) a ## _3DNow
 896 #include "swscale_template.c"
 897 #endif
 898
 899 #endif //ARCH_X86 || ARCH_X86_64
 900
 901 // minor note: the HAVE_xyz is messed up after that line so don't use it
 902
 903 static double getSplineCoeff(double a, double b, double c, double d, double dist)
 904 {
 905 //      printf("%f %f %f %f %f\n", a,b,c,d,dist);
 906         if(dist<=1.0)   return ((d*dist + c)*dist + b)*dist +a;
 907         else            return getSplineCoeff(  0.0,
 908                                                  b+ 2.0*c + 3.0*d,
 909                                                         c + 3.0*d,
 910                                                 -b- 3.0*c - 6.0*d,
 911                                                 dist-1.0);
 912 }
 913
 914 static inline int initFilter(int16_t **outFilter, int16_t **filterPos, int *outFilterSize, int xInc,
 915                               int srcW, int dstW, int filterAlign, int one, int flags,
 916                               SwsVector *srcFilter, SwsVector *dstFilter, double param[2])
 917 {
 918         int i;
 919         int filterSize;
 920         int filter2Size;
 921         int minFilterSize;
 922         double *filter=NULL;
 923         double *filter2=NULL;
 924 #if defined(ARCH_X86)
 925         if(flags & SWS_CPU_CAPS_MMX)
 926                 asm volatile("emms\n\t"::: "memory"); //FIXME this shouldnt be required but it IS (even for non mmx versions)
 927 #endif
 928
 929         // Note the +1 is for the MMXscaler which reads over the end
 930         *filterPos = av_malloc((dstW+1)*sizeof(int16_t));
 931
 932         if(FFABS(xInc - 0x10000) <10) // unscaled
 933         {
 934                 int i;
 935                 filterSize= 1;
 936                 filter= av_malloc(dstW*sizeof(double)*filterSize);
 937                 for(i=0; i<dstW*filterSize; i++) filter[i]=0;
 938
 939                 for(i=0; i<dstW; i++)
 940                 {
 941                         filter[i*filterSize]=1;
 942                         (*filterPos)[i]=i;
 943                 }
 944
 945         }
 946         else if(flags&SWS_POINT) // lame looking point sampling mode
 947         {
 948                 int i;
 949                 int xDstInSrc;
 950                 filterSize= 1;
 951                 filter= av_malloc(dstW*sizeof(double)*filterSize);
 952
 953                 xDstInSrc= xInc/2 - 0x8000;
 954                 for(i=0; i<dstW; i++)
 955                 {
 956                         int xx= (xDstInSrc - ((filterSize-1)<<15) + (1<<15))>>16;
 957
 958                         (*filterPos)[i]= xx;
 959                         filter[i]= 1.0;
 960                         xDstInSrc+= xInc;
 961                 }
 962         }
 963         else if((xInc <= (1<<16) && (flags&SWS_AREA)) || (flags&SWS_FAST_BILINEAR)) // bilinear upscale
 964         {
 965                 int i;
 966                 int xDstInSrc;
 967                 if     (flags&SWS_BICUBIC) filterSize= 4;
 968                 else if(flags&SWS_X      ) filterSize= 4;
 969                 else                       filterSize= 2; // SWS_BILINEAR / SWS_AREA
 970                 filter= av_malloc(dstW*sizeof(double)*filterSize);
 971
 972                 xDstInSrc= xInc/2 - 0x8000;
 973                 for(i=0; i<dstW; i++)
 974                 {
 975                         int xx= (xDstInSrc - ((filterSize-1)<<15) + (1<<15))>>16;
 976                         int j;
 977
 978                         (*filterPos)[i]= xx;
 979                                 //Bilinear upscale / linear interpolate / Area averaging
 980                                 for(j=0; j<filterSize; j++)
 981                                 {
 982                                         double d= FFABS((xx<<16) - xDstInSrc)/(double)(1<<16);
 983                                         double coeff= 1.0 - d;
 984                                         if(coeff<0) coeff=0;
 985                                         filter[i*filterSize + j]= coeff;
 986                                         xx++;
 987                                 }
 988                         xDstInSrc+= xInc;
 989                 }
 990         }
 991         else
 992         {
 993                 double xDstInSrc;
 994                 double sizeFactor, filterSizeInSrc;
 995                 const double xInc1= (double)xInc / (double)(1<<16);
 996
 997                 if     (flags&SWS_BICUBIC)      sizeFactor= 4.0;
 998                 else if(flags&SWS_X)            sizeFactor= 8.0;
 999                 else if(flags&SWS_AREA)         sizeFactor= 1.0; //downscale only, for upscale it is bilinear
1000                 else if(flags&SWS_GAUSS)        sizeFactor= 8.0;   // infinite ;)
1001                 else if(flags&SWS_LANCZOS)      sizeFactor= param[0] != SWS_PARAM_DEFAULT ? 2.0*param[0] : 6.0;
1002                 else if(flags&SWS_SINC)         sizeFactor= 20.0; // infinite ;)
1003                 else if(flags&SWS_SPLINE)       sizeFactor= 20.0;  // infinite ;)
1004                 else if(flags&SWS_BILINEAR)     sizeFactor= 2.0;
1005                 else {
1006                         sizeFactor= 0.0; //GCC warning killer
1007                         ASSERT(0)
1008                 }
1009
1010                 if(xInc1 <= 1.0)        filterSizeInSrc= sizeFactor; // upscale
1011                 else                    filterSizeInSrc= sizeFactor*srcW / (double)dstW;
1012
1013                 filterSize= (int)ceil(1 + filterSizeInSrc); // will be reduced later if possible
1014                 if(filterSize > srcW-2) filterSize=srcW-2;
1015
1016                 filter= av_malloc(dstW*sizeof(double)*filterSize);
1017
1018                 xDstInSrc= xInc1 / 2.0 - 0.5;
1019                 for(i=0; i<dstW; i++)
1020                 {
1021                         int xx= (int)(xDstInSrc - (filterSize-1)*0.5 + 0.5);
1022                         int j;
1023                         (*filterPos)[i]= xx;
1024                         for(j=0; j<filterSize; j++)
1025                         {
1026                                 double d= FFABS(xx - xDstInSrc)/filterSizeInSrc*sizeFactor;
1027                                 double coeff;
1028                                 if(flags & SWS_BICUBIC)
1029                                 {
1030                                         double B= param[0] != SWS_PARAM_DEFAULT ? param[0] : 0.0;
1031                                         double C= param[1] != SWS_PARAM_DEFAULT ? param[1] : 0.6;
1032
1033                                         if(d<1.0)
1034                                                 coeff = (12-9*B-6*C)*d*d*d + (-18+12*B+6*C)*d*d + 6-2*B;
1035                                         else if(d<2.0)
1036                                                 coeff = (-B-6*C)*d*d*d + (6*B+30*C)*d*d + (-12*B-48*C)*d +8*B+24*C;
1037                                         else
1038                                                 coeff=0.0;
1039                                 }
1040 /*                              else if(flags & SWS_X)
1041                                 {
1042                                         double p= param ? param*0.01 : 0.3;
1043                                         coeff = d ? sin(d*PI)/(d*PI) : 1.0;
1044                                         coeff*= pow(2.0, - p*d*d);
1045                                 }*/
1046                                 else if(flags & SWS_X)
1047                                 {
1048                                         double A= param[0] != SWS_PARAM_DEFAULT ? param[0] : 1.0;
1049
1050                                         if(d<1.0)
1051                                                 coeff = cos(d*PI);
1052                                         else
1053                                                 coeff=-1.0;
1054                                         if(coeff<0.0)   coeff= -pow(-coeff, A);
1055                                         else            coeff=  pow( coeff, A);
1056                                         coeff= coeff*0.5 + 0.5;
1057                                 }
1058                                 else if(flags & SWS_AREA)
1059                                 {
1060                                         double srcPixelSize= 1.0/xInc1;
1061                                         if(d + srcPixelSize/2 < 0.5) coeff= 1.0;
1062                                         else if(d - srcPixelSize/2 < 0.5) coeff= (0.5-d)/srcPixelSize + 0.5;
1063                                         else coeff=0.0;
1064                                 }
1065                                 else if(flags & SWS_GAUSS)
1066                                 {
1067                                         double p= param[0] != SWS_PARAM_DEFAULT ? param[0] : 3.0;
1068                                         coeff = pow(2.0, - p*d*d);
1069                                 }
1070                                 else if(flags & SWS_SINC)
1071                                 {
1072                                         coeff = d ? sin(d*PI)/(d*PI) : 1.0;
1073                                 }
1074                                 else if(flags & SWS_LANCZOS)
1075                                 {
1076                                         double p= param[0] != SWS_PARAM_DEFAULT ? param[0] : 3.0;
1077                                         coeff = d ? sin(d*PI)*sin(d*PI/p)/(d*d*PI*PI/p) : 1.0;
1078                                         if(d>p) coeff=0;
1079                                 }
1080                                 else if(flags & SWS_BILINEAR)
1081                                 {
1082                                         coeff= 1.0 - d;
1083                                         if(coeff<0) coeff=0;
1084                                 }
1085                                 else if(flags & SWS_SPLINE)
1086                                 {
1087                                         double p=-2.196152422706632;
1088                                         coeff = getSplineCoeff(1.0, 0.0, p, -p-1.0, d);
1089                                 }
1090                                 else {
1091                                         coeff= 0.0; //GCC warning killer
1092                                         ASSERT(0)
1093                                 }
1094
1095                                 filter[i*filterSize + j]= coeff;
1096                                 xx++;
1097                         }
1098                         xDstInSrc+= xInc1;
1099                 }
1100         }
1101
1102         /* apply src & dst Filter to filter -> filter2
1103            av_free(filter);
1104         */
1105         ASSERT(filterSize>0)
1106         filter2Size= filterSize;
1107         if(srcFilter) filter2Size+= srcFilter->length - 1;
1108         if(dstFilter) filter2Size+= dstFilter->length - 1;
1109         ASSERT(filter2Size>0)
1110         filter2= av_malloc(filter2Size*dstW*sizeof(double));
1111
1112         for(i=0; i<dstW; i++)
1113         {
1114                 int j;
1115                 SwsVector scaleFilter;
1116                 SwsVector *outVec;
1117
1118                 scaleFilter.coeff= filter + i*filterSize;
1119                 scaleFilter.length= filterSize;
1120
1121                 if(srcFilter) outVec= sws_getConvVec(srcFilter, &scaleFilter);
1122                 else          outVec= &scaleFilter;
1123
1124                 ASSERT(outVec->length == filter2Size)
1125                 //FIXME dstFilter
1126
1127                 for(j=0; j<outVec->length; j++)
1128                 {
1129                         filter2[i*filter2Size + j]= outVec->coeff[j];
1130                 }
1131
1132                 (*filterPos)[i]+= (filterSize-1)/2 - (filter2Size-1)/2;
1133
1134                 if(outVec != &scaleFilter) sws_freeVec(outVec);
1135         }
1136         av_free(filter); filter=NULL;
1137
1138         /* try to reduce the filter-size (step1 find size and shift left) */
1139         // Assume its near normalized (*0.5 or *2.0 is ok but * 0.001 is not)
1140         minFilterSize= 0;
1141         for(i=dstW-1; i>=0; i--)
1142         {
1143                 int min= filter2Size;
1144                 int j;
1145                 double cutOff=0.0;
1146
1147                 /* get rid off near zero elements on the left by shifting left */
1148                 for(j=0; j<filter2Size; j++)
1149                 {
1150                         int k;
1151                         cutOff += FFABS(filter2[i*filter2Size]);
1152
1153                         if(cutOff > SWS_MAX_REDUCE_CUTOFF) break;
1154
1155                         /* preserve Monotonicity because the core can't handle the filter otherwise */
1156                         if(i<dstW-1 && (*filterPos)[i] >= (*filterPos)[i+1]) break;
1157
1158                         // Move filter coeffs left
1159                         for(k=1; k<filter2Size; k++)
1160                                 filter2[i*filter2Size + k - 1]= filter2[i*filter2Size + k];
1161                         filter2[i*filter2Size + k - 1]= 0.0;
1162                         (*filterPos)[i]++;
1163                 }
1164
1165                 cutOff=0.0;
1166                 /* count near zeros on the right */
1167                 for(j=filter2Size-1; j>0; j--)
1168                 {
1169                         cutOff += FFABS(filter2[i*filter2Size + j]);
1170
1171                         if(cutOff > SWS_MAX_REDUCE_CUTOFF) break;
1172                         min--;
1173                 }
1174
1175                 if(min>minFilterSize) minFilterSize= min;
1176         }
1177
1178         if (flags & SWS_CPU_CAPS_ALTIVEC) {
1179           // we can handle the special case 4,
1180           // so we don't want to go to the full 8
1181           if (minFilterSize < 5)
1182             filterAlign = 4;
1183
1184           // we really don't want to waste our time
1185           // doing useless computation, so fall-back on
1186           // the scalar C code for very small filter.
1187           // vectorizing is worth it only if you have
1188           // decent-sized vector.
1189           if (minFilterSize < 3)
1190             filterAlign = 1;
1191         }
1192
1193         if (flags & SWS_CPU_CAPS_MMX) {
1194                 // special case for unscaled vertical filtering
1195                 if(minFilterSize == 1 && filterAlign == 2)
1196                         filterAlign= 1;
1197         }
1198
1199         ASSERT(minFilterSize > 0)
1200         filterSize= (minFilterSize +(filterAlign-1)) & (~(filterAlign-1));
1201         ASSERT(filterSize > 0)
1202         filter= av_malloc(filterSize*dstW*sizeof(double));
1203         if(filterSize >= MAX_FILTER_SIZE)
1204                 return -1;
1205         *outFilterSize= filterSize;
1206
1207         if(flags&SWS_PRINT_INFO)
1208                 av_log(NULL, AV_LOG_VERBOSE, "SwScaler: reducing / aligning filtersize %d -> %d\n", filter2Size, filterSize);
1209         /* try to reduce the filter-size (step2 reduce it) */
1210         for(i=0; i<dstW; i++)
1211         {
1212                 int j;
1213
1214                 for(j=0; j<filterSize; j++)
1215                 {
1216                         if(j>=filter2Size) filter[i*filterSize + j]= 0.0;
1217                         else               filter[i*filterSize + j]= filter2[i*filter2Size + j];
1218                 }
1219         }
1220         av_free(filter2); filter2=NULL;
1221
1222
1223         //FIXME try to align filterpos if possible
1224
1225         //fix borders
1226         for(i=0; i<dstW; i++)
1227         {
1228                 int j;
1229                 if((*filterPos)[i] < 0)
1230                 {
1231                         // Move filter coeffs left to compensate for filterPos
1232                         for(j=1; j<filterSize; j++)
1233                         {
1234                                 int left= FFMAX(j + (*filterPos)[i], 0);
1235                                 filter[i*filterSize + left] += filter[i*filterSize + j];
1236                                 filter[i*filterSize + j]=0;
1237                         }
1238                         (*filterPos)[i]= 0;
1239                 }
1240
1241                 if((*filterPos)[i] + filterSize > srcW)
1242                 {
1243                         int shift= (*filterPos)[i] + filterSize - srcW;
1244                         // Move filter coeffs right to compensate for filterPos
1245                         for(j=filterSize-2; j>=0; j--)
1246                         {
1247                                 int right= FFMIN(j + shift, filterSize-1);
1248                                 filter[i*filterSize +right] += filter[i*filterSize +j];
1249                                 filter[i*filterSize +j]=0;
1250                         }
1251                         (*filterPos)[i]= srcW - filterSize;
1252                 }
1253         }
1254
1255         // Note the +1 is for the MMXscaler which reads over the end
1256         /* align at 16 for AltiVec (needed by hScale_altivec_real) */
1257         *outFilter= av_mallocz(*outFilterSize*(dstW+1)*sizeof(int16_t));
1258
1259         /* Normalize & Store in outFilter */
1260         for(i=0; i<dstW; i++)
1261         {
1262                 int j;
1263                 double error=0;
1264                 double sum=0;
1265                 double scale= one;
1266
1267                 for(j=0; j<filterSize; j++)
1268                 {
1269                         sum+= filter[i*filterSize + j];
1270                 }
1271                 scale/= sum;
1272                 for(j=0; j<*outFilterSize; j++)
1273                 {
1274                         double v= filter[i*filterSize + j]*scale + error;
1275                         int intV= floor(v + 0.5);
1276                         (*outFilter)[i*(*outFilterSize) + j]= intV;
1277                         error = v - intV;
1278                 }
1279         }
1280
1281         (*filterPos)[dstW]= (*filterPos)[dstW-1]; // the MMX scaler will read over the end
1282         for(i=0; i<*outFilterSize; i++)
1283         {
1284                 int j= dstW*(*outFilterSize);
1285                 (*outFilter)[j + i]= (*outFilter)[j + i - (*outFilterSize)];
1286         }
1287
1288         av_free(filter);
1289         return 0;
1290 }
1291
1292 #ifdef COMPILE_MMX2
1293 static void initMMX2HScaler(int dstW, int xInc, uint8_t *funnyCode, int16_t *filter, int32_t *filterPos, int numSplits)
1294 {
1295         uint8_t *fragmentA;
1296         long imm8OfPShufW1A;
1297         long imm8OfPShufW2A;
1298         long fragmentLengthA;
1299         uint8_t *fragmentB;
1300         long imm8OfPShufW1B;
1301         long imm8OfPShufW2B;
1302         long fragmentLengthB;
1303         int fragmentPos;
1304
1305         int xpos, i;
1306
1307         // create an optimized horizontal scaling routine
1308
1309         //code fragment
1310
1311         asm volatile(
1312                 "jmp 9f                         \n\t"
1313         // Begin
1314                 "0:                             \n\t"
1315                 "movq (%%"REG_d", %%"REG_a"), %%mm3\n\t"
1316                 "movd (%%"REG_c", %%"REG_S"), %%mm0\n\t"
1317                 "movd 1(%%"REG_c", %%"REG_S"), %%mm1\n\t"
1318                 "punpcklbw %%mm7, %%mm1         \n\t"
1319                 "punpcklbw %%mm7, %%mm0         \n\t"
1320                 "pshufw $0xFF, %%mm1, %%mm1     \n\t"
1321                 "1:                             \n\t"
1322                 "pshufw $0xFF, %%mm0, %%mm0     \n\t"
1323                 "2:                             \n\t"
1324                 "psubw %%mm1, %%mm0             \n\t"
1325                 "movl 8(%%"REG_b", %%"REG_a"), %%esi\n\t"
1326                 "pmullw %%mm3, %%mm0            \n\t"
1327                 "psllw $7, %%mm1                \n\t"
1328                 "paddw %%mm1, %%mm0             \n\t"
1329
1330                 "movq %%mm0, (%%"REG_D", %%"REG_a")\n\t"
1331
1332                 "add $8, %%"REG_a"              \n\t"
1333         // End
1334                 "9:                             \n\t"
1335 //              "int $3\n\t"
1336                 "lea 0b, %0                     \n\t"
1337                 "lea 1b, %1                     \n\t"
1338                 "lea 2b, %2                     \n\t"
1339                 "dec %1                         \n\t"
1340                 "dec %2                         \n\t"
1341                 "sub %0, %1                     \n\t"
1342                 "sub %0, %2                     \n\t"
1343                 "lea 9b, %3                     \n\t"
1344                 "sub %0, %3                     \n\t"
1345
1346
1347                 :"=r" (fragmentA), "=r" (imm8OfPShufW1A), "=r" (imm8OfPShufW2A),
1348                 "=r" (fragmentLengthA)
1349         );
1350
1351         asm volatile(
1352                 "jmp 9f                         \n\t"
1353         // Begin
1354                 "0:                             \n\t"
1355                 "movq (%%"REG_d", %%"REG_a"), %%mm3\n\t"
1356                 "movd (%%"REG_c", %%"REG_S"), %%mm0\n\t"
1357                 "punpcklbw %%mm7, %%mm0         \n\t"
1358                 "pshufw $0xFF, %%mm0, %%mm1     \n\t"
1359                 "1:                             \n\t"
1360                 "pshufw $0xFF, %%mm0, %%mm0     \n\t"
1361                 "2:                             \n\t"
1362                 "psubw %%mm1, %%mm0             \n\t"
1363                 "movl 8(%%"REG_b", %%"REG_a"), %%esi\n\t"
1364                 "pmullw %%mm3, %%mm0            \n\t"
1365                 "psllw $7, %%mm1                \n\t"
1366                 "paddw %%mm1, %%mm0             \n\t"
1367
1368                 "movq %%mm0, (%%"REG_D", %%"REG_a")\n\t"
1369
1370                 "add $8, %%"REG_a"              \n\t"
1371         // End
1372                 "9:                             \n\t"
1373 //              "int $3\n\t"
1374                 "lea 0b, %0                     \n\t"
1375                 "lea 1b, %1                     \n\t"
1376                 "lea 2b, %2                     \n\t"
1377                 "dec %1                         \n\t"
1378                 "dec %2                         \n\t"
1379                 "sub %0, %1                     \n\t"
1380                 "sub %0, %2                     \n\t"
1381                 "lea 9b, %3                     \n\t"
1382                 "sub %0, %3                     \n\t"
1383
1384
1385                 :"=r" (fragmentB), "=r" (imm8OfPShufW1B), "=r" (imm8OfPShufW2B),
1386                 "=r" (fragmentLengthB)
1387         );
1388
1389         xpos= 0; //lumXInc/2 - 0x8000; // difference between pixel centers
1390         fragmentPos=0;
1391
1392         for(i=0; i<dstW/numSplits; i++)
1393         {
1394                 int xx=xpos>>16;
1395
1396                 if((i&3) == 0)
1397                 {
1398                         int a=0;
1399                         int b=((xpos+xInc)>>16) - xx;
1400                         int c=((xpos+xInc*2)>>16) - xx;
1401                         int d=((xpos+xInc*3)>>16) - xx;
1402
1403                         filter[i  ] = (( xpos         & 0xFFFF) ^ 0xFFFF)>>9;
1404                         filter[i+1] = (((xpos+xInc  ) & 0xFFFF) ^ 0xFFFF)>>9;
1405                         filter[i+2] = (((xpos+xInc*2) & 0xFFFF) ^ 0xFFFF)>>9;
1406                         filter[i+3] = (((xpos+xInc*3) & 0xFFFF) ^ 0xFFFF)>>9;
1407                         filterPos[i/2]= xx;
1408
1409                         if(d+1<4)
1410                         {
1411                                 int maxShift= 3-(d+1);
1412                                 int shift=0;
1413
1414                                 memcpy(funnyCode + fragmentPos, fragmentB, fragmentLengthB);
1415
1416                                 funnyCode[fragmentPos + imm8OfPShufW1B]=
1417                                         (a+1) | ((b+1)<<2) | ((c+1)<<4) | ((d+1)<<6);
1418                                 funnyCode[fragmentPos + imm8OfPShufW2B]=
1419                                         a | (b<<2) | (c<<4) | (d<<6);
1420
1421                                 if(i+3>=dstW) shift=maxShift; //avoid overread
1422                                 else if((filterPos[i/2]&3) <= maxShift) shift=filterPos[i/2]&3; //Align
1423
1424                                 if(shift && i>=shift)
1425                                 {
1426                                         funnyCode[fragmentPos + imm8OfPShufW1B]+= 0x55*shift;
1427                                         funnyCode[fragmentPos + imm8OfPShufW2B]+= 0x55*shift;
1428                                         filterPos[i/2]-=shift;
1429                                 }
1430
1431                                 fragmentPos+= fragmentLengthB;
1432                         }
1433                         else
1434                         {
1435                                 int maxShift= 3-d;
1436                                 int shift=0;
1437
1438                                 memcpy(funnyCode + fragmentPos, fragmentA, fragmentLengthA);
1439
1440                                 funnyCode[fragmentPos + imm8OfPShufW1A]=
1441                                 funnyCode[fragmentPos + imm8OfPShufW2A]=
1442                                         a | (b<<2) | (c<<4) | (d<<6);
1443
1444                                 if(i+4>=dstW) shift=maxShift; //avoid overread
1445                                 else if((filterPos[i/2]&3) <= maxShift) shift=filterPos[i/2]&3; //partial align
1446
1447                                 if(shift && i>=shift)
1448                                 {
1449                                         funnyCode[fragmentPos + imm8OfPShufW1A]+= 0x55*shift;
1450                                         funnyCode[fragmentPos + imm8OfPShufW2A]+= 0x55*shift;
1451                                         filterPos[i/2]-=shift;
1452                                 }
1453
1454                                 fragmentPos+= fragmentLengthA;
1455                         }
1456
1457                         funnyCode[fragmentPos]= RET;
1458                 }
1459                 xpos+=xInc;
1460         }
1461         filterPos[i/2]= xpos>>16; // needed to jump to the next part
1462 }
1463 #endif /* COMPILE_MMX2 */
1464
1465 static void globalInit(void){
1466     // generating tables:
1467     int i;
1468     for(i=0; i<768; i++){
1469         int c= av_clip_uint8(i-256);
1470         clip_table[i]=c;
1471     }
1472 }
1473
1474 static SwsFunc getSwsFunc(int flags){
1475
1476 #if defined(RUNTIME_CPUDETECT) && defined (CONFIG_GPL)
1477 #if defined(ARCH_X86)
1478         // ordered per speed fasterst first
1479         if(flags & SWS_CPU_CAPS_MMX2)
1480                 return swScale_MMX2;
1481         else if(flags & SWS_CPU_CAPS_3DNOW)
1482                 return swScale_3DNow;
1483         else if(flags & SWS_CPU_CAPS_MMX)
1484                 return swScale_MMX;
1485         else
1486                 return swScale_C;
1487
1488 #else
1489 #ifdef ARCH_POWERPC
1490         if(flags & SWS_CPU_CAPS_ALTIVEC)
1491           return swScale_altivec;
1492         else
1493           return swScale_C;
1494 #endif
1495         return swScale_C;
1496 #endif /* defined(ARCH_X86) */
1497 #else //RUNTIME_CPUDETECT
1498 #ifdef HAVE_MMX2
1499         return swScale_MMX2;
1500 #elif defined (HAVE_3DNOW)
1501         return swScale_3DNow;
1502 #elif defined (HAVE_MMX)
1503         return swScale_MMX;
1504 #elif defined (HAVE_ALTIVEC)
1505         return swScale_altivec;
1506 #else
1507         return swScale_C;
1508 #endif
1509 #endif //!RUNTIME_CPUDETECT
1510 }
1511
1512 static int PlanarToNV12Wrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,
1513              int srcSliceH, uint8_t* dstParam[], int dstStride[]){
1514         uint8_t *dst=dstParam[0] + dstStride[0]*srcSliceY;
1515         /* Copy Y plane */
1516         if(dstStride[0]==srcStride[0] && srcStride[0] > 0)
1517                 memcpy(dst, src[0], srcSliceH*dstStride[0]);
1518         else
1519         {
1520                 int i;
1521                 uint8_t *srcPtr= src[0];
1522                 uint8_t *dstPtr= dst;
1523                 for(i=0; i<srcSliceH; i++)
1524                 {
1525                         memcpy(dstPtr, srcPtr, c->srcW);
1526                         srcPtr+= srcStride[0];
1527                         dstPtr+= dstStride[0];
1528                 }
1529         }
1530         dst = dstParam[1] + dstStride[1]*srcSliceY/2;
1531         if (c->dstFormat == PIX_FMT_NV12)
1532                 interleaveBytes( src[1],src[2],dst,c->srcW/2,srcSliceH/2,srcStride[1],srcStride[2],dstStride[0] );
1533         else
1534                 interleaveBytes( src[2],src[1],dst,c->srcW/2,srcSliceH/2,srcStride[2],srcStride[1],dstStride[0] );
1535
1536         return srcSliceH;
1537 }
1538
1539 static int PlanarToYuy2Wrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,
1540              int srcSliceH, uint8_t* dstParam[], int dstStride[]){
1541         uint8_t *dst=dstParam[0] + dstStride[0]*srcSliceY;
1542
1543         yv12toyuy2( src[0],src[1],src[2],dst,c->srcW,srcSliceH,srcStride[0],srcStride[1],dstStride[0] );
1544
1545         return srcSliceH;
1546 }
1547
1548 static int PlanarToUyvyWrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,
1549              int srcSliceH, uint8_t* dstParam[], int dstStride[]){
1550         uint8_t *dst=dstParam[0] + dstStride[0]*srcSliceY;
1551
1552         yv12touyvy( src[0],src[1],src[2],dst,c->srcW,srcSliceH,srcStride[0],srcStride[1],dstStride[0] );
1553
1554         return srcSliceH;
1555 }
1556
1557 /* {RGB,BGR}{15,16,24,32} -> {RGB,BGR}{15,16,24,32} */
1558 static int rgb2rgbWrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,
1559                            int srcSliceH, uint8_t* dst[], int dstStride[]){
1560         const int srcFormat= c->srcFormat;
1561         const int dstFormat= c->dstFormat;
1562         const int srcBpp= (fmt_depth(srcFormat) + 7) >> 3;
1563         const int dstBpp= (fmt_depth(dstFormat) + 7) >> 3;
1564         const int srcId= fmt_depth(srcFormat) >> 2; /* 1:0, 4:1, 8:2, 15:3, 16:4, 24:6, 32:8 */
1565         const int dstId= fmt_depth(dstFormat) >> 2;
1566         void (*conv)(const uint8_t *src, uint8_t *dst, long src_size)=NULL;
1567
1568         /* BGR -> BGR */
1569         if(   (isBGR(srcFormat) && isBGR(dstFormat))
1570            || (isRGB(srcFormat) && isRGB(dstFormat))){
1571                 switch(srcId | (dstId<<4)){
1572                 case 0x34: conv= rgb16to15; break;
1573                 case 0x36: conv= rgb24to15; break;
1574                 case 0x38: conv= rgb32to15; break;
1575                 case 0x43: conv= rgb15to16; break;
1576                 case 0x46: conv= rgb24to16; break;
1577                 case 0x48: conv= rgb32to16; break;
1578                 case 0x63: conv= rgb15to24; break;
1579                 case 0x64: conv= rgb16to24; break;
1580                 case 0x68: conv= rgb32to24; break;
1581                 case 0x83: conv= rgb15to32; break;
1582                 case 0x84: conv= rgb16to32; break;
1583                 case 0x86: conv= rgb24to32; break;
1584                 default: av_log(c, AV_LOG_ERROR, "swScaler: internal error %s -> %s converter\n",
1585                                  sws_format_name(srcFormat), sws_format_name(dstFormat)); break;
1586                 }
1587         }else if(   (isBGR(srcFormat) && isRGB(dstFormat))
1588                  || (isRGB(srcFormat) && isBGR(dstFormat))){
1589                 switch(srcId | (dstId<<4)){
1590                 case 0x33: conv= rgb15tobgr15; break;
1591                 case 0x34: conv= rgb16tobgr15; break;
1592                 case 0x36: conv= rgb24tobgr15; break;
1593                 case 0x38: conv= rgb32tobgr15; break;
1594                 case 0x43: conv= rgb15tobgr16; break;
1595                 case 0x44: conv= rgb16tobgr16; break;
1596                 case 0x46: conv= rgb24tobgr16; break;
1597                 case 0x48: conv= rgb32tobgr16; break;
1598                 case 0x63: conv= rgb15tobgr24; break;
1599                 case 0x64: conv= rgb16tobgr24; break;
1600                 case 0x66: conv= rgb24tobgr24; break;
1601                 case 0x68: conv= rgb32tobgr24; break;
1602                 case 0x83: conv= rgb15tobgr32; break;
1603                 case 0x84: conv= rgb16tobgr32; break;
1604                 case 0x86: conv= rgb24tobgr32; break;
1605                 case 0x88: conv= rgb32tobgr32; break;
1606                 default: av_log(c, AV_LOG_ERROR, "swScaler: internal error %s -> %s converter\n",
1607                                  sws_format_name(srcFormat), sws_format_name(dstFormat)); break;
1608                 }
1609         }else{
1610                 av_log(c, AV_LOG_ERROR, "swScaler: internal error %s -> %s converter\n",
1611                          sws_format_name(srcFormat), sws_format_name(dstFormat));
1612         }
1613
1614         if(dstStride[0]*srcBpp == srcStride[0]*dstBpp)
1615                 conv(src[0], dst[0] + dstStride[0]*srcSliceY, srcSliceH*srcStride[0]);
1616         else
1617         {
1618                 int i;
1619                 uint8_t *srcPtr= src[0];
1620                 uint8_t *dstPtr= dst[0] + dstStride[0]*srcSliceY;
1621
1622                 for(i=0; i<srcSliceH; i++)
1623                 {
1624                         conv(srcPtr, dstPtr, c->srcW*srcBpp);
1625                         srcPtr+= srcStride[0];
1626                         dstPtr+= dstStride[0];
1627                 }
1628         }
1629         return srcSliceH;
1630 }
1631
1632 static int bgr24toyv12Wrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,
1633              int srcSliceH, uint8_t* dst[], int dstStride[]){
1634
1635         rgb24toyv12(
1636                 src[0],
1637                 dst[0]+ srcSliceY    *dstStride[0],
1638                 dst[1]+(srcSliceY>>1)*dstStride[1],
1639                 dst[2]+(srcSliceY>>1)*dstStride[2],
1640                 c->srcW, srcSliceH,
1641                 dstStride[0], dstStride[1], srcStride[0]);
1642         return srcSliceH;
1643 }
1644
1645 static int yvu9toyv12Wrapper(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,
1646              int srcSliceH, uint8_t* dst[], int dstStride[]){
1647         int i;
1648
1649         /* copy Y */
1650         if(srcStride[0]==dstStride[0] && srcStride[0] > 0)
1651                 memcpy(dst[0]+ srcSliceY*dstStride[0], src[0], srcStride[0]*srcSliceH);
1652         else{
1653                 uint8_t *srcPtr= src[0];
1654                 uint8_t *dstPtr= dst[0] + dstStride[0]*srcSliceY;
1655
1656                 for(i=0; i<srcSliceH; i++)
1657                 {
1658                         memcpy(dstPtr, srcPtr, c->srcW);
1659                         srcPtr+= srcStride[0];
1660                         dstPtr+= dstStride[0];
1661                 }
1662         }
1663
1664         if(c->dstFormat==PIX_FMT_YUV420P){
1665                 planar2x(src[1], dst[1], c->chrSrcW, c->chrSrcH, srcStride[1], dstStride[1]);
1666                 planar2x(src[2], dst[2], c->chrSrcW, c->chrSrcH, srcStride[2], dstStride[2]);
1667         }else{
1668                 planar2x(src[1], dst[2], c->chrSrcW, c->chrSrcH, srcStride[1], dstStride[2]);
1669                 planar2x(src[2], dst[1], c->chrSrcW, c->chrSrcH, srcStride[2], dstStride[1]);
1670         }
1671         return srcSliceH;
1672 }
1673
1674 /* unscaled copy like stuff (assumes nearly identical formats) */
1675 static int simpleCopy(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,
1676              int srcSliceH, uint8_t* dst[], int dstStride[]){
1677
1678         if(isPacked(c->srcFormat))
1679         {
1680                 if(dstStride[0]==srcStride[0] && srcStride[0] > 0)
1681                         memcpy(dst[0] + dstStride[0]*srcSliceY, src[0], srcSliceH*dstStride[0]);
1682                 else
1683                 {
1684                         int i;
1685                         uint8_t *srcPtr= src[0];
1686                         uint8_t *dstPtr= dst[0] + dstStride[0]*srcSliceY;
1687                         int length=0;
1688
1689                         /* universal length finder */
1690                         while(length+c->srcW <= FFABS(dstStride[0])
1691                            && length+c->srcW <= FFABS(srcStride[0])) length+= c->srcW;
1692                         ASSERT(length!=0);
1693
1694                         for(i=0; i<srcSliceH; i++)
1695                         {
1696                                 memcpy(dstPtr, srcPtr, length);
1697                                 srcPtr+= srcStride[0];
1698                                 dstPtr+= dstStride[0];
1699                         }
1700                 }
1701         }
1702         else
1703         { /* Planar YUV or gray */
1704                 int plane;
1705                 for(plane=0; plane<3; plane++)
1706                 {
1707                         int length= plane==0 ? c->srcW  : -((-c->srcW  )>>c->chrDstHSubSample);
1708                         int y=      plane==0 ? srcSliceY: -((-srcSliceY)>>c->chrDstVSubSample);
1709                         int height= plane==0 ? srcSliceH: -((-srcSliceH)>>c->chrDstVSubSample);
1710
1711                         if((isGray(c->srcFormat) || isGray(c->dstFormat)) && plane>0)
1712                         {
1713                                 if(!isGray(c->dstFormat))
1714                                         memset(dst[plane], 128, dstStride[plane]*height);
1715                         }
1716                         else
1717                         {
1718                                 if(dstStride[plane]==srcStride[plane] && srcStride[plane] > 0)
1719                                         memcpy(dst[plane] + dstStride[plane]*y, src[plane], height*dstStride[plane]);
1720                                 else
1721                                 {
1722                                         int i;
1723                                         uint8_t *srcPtr= src[plane];
1724                                         uint8_t *dstPtr= dst[plane] + dstStride[plane]*y;
1725                                         for(i=0; i<height; i++)
1726                                         {
1727                                                 memcpy(dstPtr, srcPtr, length);
1728                                                 srcPtr+= srcStride[plane];
1729                                                 dstPtr+= dstStride[plane];
1730                                         }
1731                                 }
1732                         }
1733                 }
1734         }
1735         return srcSliceH;
1736 }
1737
1738 static int gray16togray(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,
1739              int srcSliceH, uint8_t* dst[], int dstStride[]){
1740
1741         int length= c->srcW;
1742         int y=      srcSliceY;
1743         int height= srcSliceH;
1744         int i, j;
1745         uint8_t *srcPtr= src[0];
1746         uint8_t *dstPtr= dst[0] + dstStride[0]*y;
1747
1748         if(!isGray(c->dstFormat)){
1749                 int height= -((-srcSliceH)>>c->chrDstVSubSample);
1750                 memset(dst[1], 128, dstStride[1]*height);
1751                 memset(dst[2], 128, dstStride[2]*height);
1752         }
1753         if(c->srcFormat == PIX_FMT_GRAY16LE) srcPtr++;
1754         for(i=0; i<height; i++)
1755         {
1756                 for(j=0; j<length; j++) dstPtr[j] = srcPtr[j<<1];
1757                 srcPtr+= srcStride[0];
1758                 dstPtr+= dstStride[0];
1759         }
1760         return srcSliceH;
1761 }
1762
1763 static int graytogray16(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,
1764              int srcSliceH, uint8_t* dst[], int dstStride[]){
1765
1766         int length= c->srcW;
1767         int y=      srcSliceY;
1768         int height= srcSliceH;
1769         int i, j;
1770         uint8_t *srcPtr= src[0];
1771         uint8_t *dstPtr= dst[0] + dstStride[0]*y;
1772         for(i=0; i<height; i++)
1773         {
1774                 for(j=0; j<length; j++)
1775                 {
1776                         dstPtr[j<<1] = srcPtr[j];
1777                         dstPtr[(j<<1)+1] = srcPtr[j];
1778                 }
1779                 srcPtr+= srcStride[0];
1780                 dstPtr+= dstStride[0];
1781         }
1782         return srcSliceH;
1783 }
1784
1785 static int gray16swap(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,
1786              int srcSliceH, uint8_t* dst[], int dstStride[]){
1787
1788         int length= c->srcW;
1789         int y=      srcSliceY;
1790         int height= srcSliceH;
1791         int i, j;
1792         uint16_t *srcPtr= src[0];
1793         uint16_t *dstPtr= dst[0] + dstStride[0]*y/2;
1794         for(i=0; i<height; i++)
1795         {
1796                 for(j=0; j<length; j++) dstPtr[j] = bswap_16(srcPtr[j]);
1797                 srcPtr+= srcStride[0]/2;
1798                 dstPtr+= dstStride[0]/2;
1799         }
1800         return srcSliceH;
1801 }
1802
1803
1804 static void getSubSampleFactors(int *h, int *v, int format){
1805         switch(format){
1806         case PIX_FMT_UYVY422:
1807         case PIX_FMT_YUYV422:
1808                 *h=1;
1809                 *v=0;
1810                 break;
1811         case PIX_FMT_YUV420P:
1812         case PIX_FMT_GRAY16BE:
1813         case PIX_FMT_GRAY16LE:
1814         case PIX_FMT_GRAY8: //FIXME remove after different subsamplings are fully implemented
1815         case PIX_FMT_NV12:
1816         case PIX_FMT_NV21:
1817                 *h=1;
1818                 *v=1;
1819                 break;
1820         case PIX_FMT_YUV410P:
1821                 *h=2;
1822                 *v=2;
1823                 break;
1824         case PIX_FMT_YUV444P:
1825                 *h=0;
1826                 *v=0;
1827                 break;
1828         case PIX_FMT_YUV422P:
1829                 *h=1;
1830                 *v=0;
1831                 break;
1832         case PIX_FMT_YUV411P:
1833                 *h=2;
1834                 *v=0;
1835                 break;
1836         default:
1837                 *h=0;
1838                 *v=0;
1839                 break;
1840         }
1841 }
1842
1843 static uint16_t roundToInt16(int64_t f){
1844         int r= (f + (1<<15))>>16;
1845              if(r<-0x7FFF) return 0x8000;
1846         else if(r> 0x7FFF) return 0x7FFF;
1847         else               return r;
1848 }
1849
1850 /**
1851  * @param inv_table the yuv2rgb coeffs, normally Inverse_Table_6_9[x]
1852  * @param fullRange if 1 then the luma range is 0..255 if 0 its 16..235
1853  * @return -1 if not supported
1854  */
1855 int sws_setColorspaceDetails(SwsContext *c, const int inv_table[4], int srcRange, const int table[4], int dstRange, int brightness, int contrast, int saturation){
1856         int64_t crv =  inv_table[0];
1857         int64_t cbu =  inv_table[1];
1858         int64_t cgu = -inv_table[2];
1859         int64_t cgv = -inv_table[3];
1860         int64_t cy  = 1<<16;
1861         int64_t oy  = 0;
1862
1863         if(isYUV(c->dstFormat) || isGray(c->dstFormat)) return -1;
1864         memcpy(c->srcColorspaceTable, inv_table, sizeof(int)*4);
1865         memcpy(c->dstColorspaceTable,     table, sizeof(int)*4);
1866
1867         c->brightness= brightness;
1868         c->contrast  = contrast;
1869         c->saturation= saturation;
1870         c->srcRange  = srcRange;
1871         c->dstRange  = dstRange;
1872
1873         c->uOffset=   0x0400040004000400LL;
1874         c->vOffset=   0x0400040004000400LL;
1875
1876         if(!srcRange){
1877                 cy= (cy*255) / 219;
1878                 oy= 16<<16;
1879         }
1880
1881         cy = (cy *contrast             )>>16;
1882         crv= (crv*contrast * saturation)>>32;
1883         cbu= (cbu*contrast * saturation)>>32;
1884         cgu= (cgu*contrast * saturation)>>32;
1885         cgv= (cgv*contrast * saturation)>>32;
1886
1887         oy -= 256*brightness;
1888
1889         c->yCoeff=    roundToInt16(cy *8192) * 0x0001000100010001ULL;
1890         c->vrCoeff=   roundToInt16(crv*8192) * 0x0001000100010001ULL;
1891         c->ubCoeff=   roundToInt16(cbu*8192) * 0x0001000100010001ULL;
1892         c->vgCoeff=   roundToInt16(cgv*8192) * 0x0001000100010001ULL;
1893         c->ugCoeff=   roundToInt16(cgu*8192) * 0x0001000100010001ULL;
1894         c->yOffset=   roundToInt16(oy *   8) * 0x0001000100010001ULL;
1895
1896         yuv2rgb_c_init_tables(c, inv_table, srcRange, brightness, contrast, saturation);
1897         //FIXME factorize
1898
1899 #ifdef COMPILE_ALTIVEC
1900         if (c->flags & SWS_CPU_CAPS_ALTIVEC)
1901             yuv2rgb_altivec_init_tables (c, inv_table, brightness, contrast, saturation);
1902 #endif
1903         return 0;
1904 }
1905
1906 /**
1907  * @return -1 if not supported
1908  */
1909 int sws_getColorspaceDetails(SwsContext *c, int **inv_table, int *srcRange, int **table, int *dstRange, int *brightness, int *contrast, int *saturation){
1910         if(isYUV(c->dstFormat) || isGray(c->dstFormat)) return -1;
1911
1912         *inv_table = c->srcColorspaceTable;
1913         *table     = c->dstColorspaceTable;
1914         *srcRange  = c->srcRange;
1915         *dstRange  = c->dstRange;
1916         *brightness= c->brightness;
1917         *contrast  = c->contrast;
1918         *saturation= c->saturation;
1919
1920         return 0;
1921 }
1922
1923 static int handle_jpeg(int *format)
1924 {
1925         switch (*format) {
1926                 case PIX_FMT_YUVJ420P:
1927                         *format = PIX_FMT_YUV420P;
1928                         return 1;
1929                 case PIX_FMT_YUVJ422P:
1930                         *format = PIX_FMT_YUV422P;
1931                         return 1;
1932                 case PIX_FMT_YUVJ444P:
1933                         *format = PIX_FMT_YUV444P;
1934                         return 1;
1935                 default:
1936                         return 0;
1937         }
1938 }
1939
1940 SwsContext *sws_getContext(int srcW, int srcH, int srcFormat, int dstW, int dstH, int dstFormat, int flags,
1941                          SwsFilter *srcFilter, SwsFilter *dstFilter, double *param){
1942
1943         SwsContext *c;
1944         int i;
1945         int usesVFilter, usesHFilter;
1946         int unscaled, needsDither;
1947         int srcRange, dstRange;
1948         SwsFilter dummyFilter= {NULL, NULL, NULL, NULL};
1949 #if defined(ARCH_X86)
1950         if(flags & SWS_CPU_CAPS_MMX)
1951                 asm volatile("emms\n\t"::: "memory");
1952 #endif
1953
1954 #if !defined(RUNTIME_CPUDETECT) || !defined (CONFIG_GPL) //ensure that the flags match the compiled variant if cpudetect is off
1955         flags &= ~(SWS_CPU_CAPS_MMX|SWS_CPU_CAPS_MMX2|SWS_CPU_CAPS_3DNOW|SWS_CPU_CAPS_ALTIVEC);
1956 #ifdef HAVE_MMX2
1957         flags |= SWS_CPU_CAPS_MMX|SWS_CPU_CAPS_MMX2;
1958 #elif defined (HAVE_3DNOW)
1959         flags |= SWS_CPU_CAPS_MMX|SWS_CPU_CAPS_3DNOW;
1960 #elif defined (HAVE_MMX)
1961         flags |= SWS_CPU_CAPS_MMX;
1962 #elif defined (HAVE_ALTIVEC)
1963         flags |= SWS_CPU_CAPS_ALTIVEC;
1964 #endif
1965 #endif /* RUNTIME_CPUDETECT */
1966         if(clip_table[512] != 255) globalInit();
1967         if(rgb15to16 == NULL) sws_rgb2rgb_init(flags);
1968
1969         unscaled = (srcW == dstW && srcH == dstH);
1970         needsDither= (isBGR(dstFormat) || isRGB(dstFormat))
1971                      && (fmt_depth(dstFormat))<24
1972                      && ((fmt_depth(dstFormat))<(fmt_depth(srcFormat)) || (!(isRGB(srcFormat) || isBGR(srcFormat))));
1973
1974         srcRange = handle_jpeg(&srcFormat);
1975         dstRange = handle_jpeg(&dstFormat);
1976
1977         if(!isSupportedIn(srcFormat))
1978         {
1979                 av_log(NULL, AV_LOG_ERROR, "swScaler: %s is not supported as input format\n", sws_format_name(srcFormat));
1980                 return NULL;
1981         }
1982         if(!isSupportedOut(dstFormat))
1983         {
1984                 av_log(NULL, AV_LOG_ERROR, "swScaler: %s is not supported as output format\n", sws_format_name(dstFormat));
1985                 return NULL;
1986         }
1987
1988         /* sanity check */
1989         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
1990         {
1991                  av_log(NULL, AV_LOG_ERROR, "swScaler: %dx%d -> %dx%d is invalid scaling dimension\n",
1992                         srcW, srcH, dstW, dstH);
1993                 return NULL;
1994         }
1995
1996         if(!dstFilter) dstFilter= &dummyFilter;
1997         if(!srcFilter) srcFilter= &dummyFilter;
1998
1999         c= av_mallocz(sizeof(SwsContext));
2000
2001         c->av_class = &sws_context_class;
2002         c->srcW= srcW;
2003         c->srcH= srcH;
2004         c->dstW= dstW;
2005         c->dstH= dstH;
2006         c->lumXInc= ((srcW<<16) + (dstW>>1))/dstW;
2007         c->lumYInc= ((srcH<<16) + (dstH>>1))/dstH;
2008         c->flags= flags;
2009         c->dstFormat= dstFormat;
2010         c->srcFormat= srcFormat;
2011         c->vRounder= 4* 0x0001000100010001ULL;
2012
2013         usesHFilter= usesVFilter= 0;
2014         if(dstFilter->lumV!=NULL && dstFilter->lumV->length>1) usesVFilter=1;
2015         if(dstFilter->lumH!=NULL && dstFilter->lumH->length>1) usesHFilter=1;
2016         if(dstFilter->chrV!=NULL && dstFilter->chrV->length>1) usesVFilter=1;
2017         if(dstFilter->chrH!=NULL && dstFilter->chrH->length>1) usesHFilter=1;
2018         if(srcFilter->lumV!=NULL && srcFilter->lumV->length>1) usesVFilter=1;
2019         if(srcFilter->lumH!=NULL && srcFilter->lumH->length>1) usesHFilter=1;
2020         if(srcFilter->chrV!=NULL && srcFilter->chrV->length>1) usesVFilter=1;
2021         if(srcFilter->chrH!=NULL && srcFilter->chrH->length>1) usesHFilter=1;
2022
2023         getSubSampleFactors(&c->chrSrcHSubSample, &c->chrSrcVSubSample, srcFormat);
2024         getSubSampleFactors(&c->chrDstHSubSample, &c->chrDstVSubSample, dstFormat);
2025
2026         // reuse chroma for 2 pixles rgb/bgr unless user wants full chroma interpolation
2027         if((isBGR(dstFormat) || isRGB(dstFormat)) && !(flags&SWS_FULL_CHR_H_INT)) c->chrDstHSubSample=1;
2028
2029         // drop some chroma lines if the user wants it
2030         c->vChrDrop= (flags&SWS_SRC_V_CHR_DROP_MASK)>>SWS_SRC_V_CHR_DROP_SHIFT;
2031         c->chrSrcVSubSample+= c->vChrDrop;
2032
2033         // drop every 2. pixel for chroma calculation unless user wants full chroma
2034         if((isBGR(srcFormat) || isRGB(srcFormat)) && !(flags&SWS_FULL_CHR_H_INP))
2035                 c->chrSrcHSubSample=1;
2036
2037         if(param){
2038                 c->param[0] = param[0];
2039                 c->param[1] = param[1];
2040         }else{
2041                 c->param[0] =
2042                 c->param[1] = SWS_PARAM_DEFAULT;
2043         }
2044
2045         c->chrIntHSubSample= c->chrDstHSubSample;
2046         c->chrIntVSubSample= c->chrSrcVSubSample;
2047
2048         // note the -((-x)>>y) is so that we allways round toward +inf
2049         c->chrSrcW= -((-srcW) >> c->chrSrcHSubSample);
2050         c->chrSrcH= -((-srcH) >> c->chrSrcVSubSample);
2051         c->chrDstW= -((-dstW) >> c->chrDstHSubSample);
2052         c->chrDstH= -((-dstH) >> c->chrDstVSubSample);
2053
2054         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);
2055
2056         /* unscaled special Cases */
2057         if(unscaled && !usesHFilter && !usesVFilter)
2058         {
2059                 /* yv12_to_nv12 */
2060                 if(srcFormat == PIX_FMT_YUV420P && (dstFormat == PIX_FMT_NV12 || dstFormat == PIX_FMT_NV21))
2061                 {
2062                         c->swScale= PlanarToNV12Wrapper;
2063                 }
2064 #ifdef CONFIG_GPL
2065                 /* yuv2bgr */
2066                 if((srcFormat==PIX_FMT_YUV420P || srcFormat==PIX_FMT_YUV422P) && (isBGR(dstFormat) || isRGB(dstFormat)))
2067                 {
2068                         c->swScale= yuv2rgb_get_func_ptr(c);
2069                 }
2070 #endif
2071
2072                 if( srcFormat==PIX_FMT_YUV410P && dstFormat==PIX_FMT_YUV420P )
2073                 {
2074                         c->swScale= yvu9toyv12Wrapper;
2075                 }
2076
2077                 /* bgr24toYV12 */
2078                 if(srcFormat==PIX_FMT_BGR24 && dstFormat==PIX_FMT_YUV420P)
2079                         c->swScale= bgr24toyv12Wrapper;
2080
2081                 /* rgb/bgr -> rgb/bgr (no dither needed forms) */
2082                 if(   (isBGR(srcFormat) || isRGB(srcFormat))
2083                    && (isBGR(dstFormat) || isRGB(dstFormat))
2084                    && !needsDither)
2085                         c->swScale= rgb2rgbWrapper;
2086
2087                 /* LQ converters if -sws 0 or -sws 4*/
2088                 if(c->flags&(SWS_FAST_BILINEAR|SWS_POINT)){
2089                         /* rgb/bgr -> rgb/bgr (dither needed forms) */
2090                         if(  (isBGR(srcFormat) || isRGB(srcFormat))
2091                           && (isBGR(dstFormat) || isRGB(dstFormat))
2092                           && needsDither)
2093                                 c->swScale= rgb2rgbWrapper;
2094
2095                         /* yv12_to_yuy2 */
2096                         if(srcFormat == PIX_FMT_YUV420P &&
2097                             (dstFormat == PIX_FMT_YUYV422 || dstFormat == PIX_FMT_UYVY422))
2098                         {
2099                                 if (dstFormat == PIX_FMT_YUYV422)
2100                                     c->swScale= PlanarToYuy2Wrapper;
2101                                 else
2102                                     c->swScale= PlanarToUyvyWrapper;
2103                         }
2104                 }
2105
2106 #ifdef COMPILE_ALTIVEC
2107                 if ((c->flags & SWS_CPU_CAPS_ALTIVEC) &&
2108                     ((srcFormat == PIX_FMT_YUV420P &&
2109                       (dstFormat == PIX_FMT_YUYV422 || dstFormat == PIX_FMT_UYVY422)))) {
2110                   // unscaled YV12 -> packed YUV, we want speed
2111                   if (dstFormat == PIX_FMT_YUYV422)
2112                     c->swScale= yv12toyuy2_unscaled_altivec;
2113                   else
2114                     c->swScale= yv12touyvy_unscaled_altivec;
2115                 }
2116 #endif
2117
2118                 /* simple copy */
2119                 if(   srcFormat == dstFormat
2120                    || (isPlanarYUV(srcFormat) && isGray(dstFormat))
2121                    || (isPlanarYUV(dstFormat) && isGray(srcFormat))
2122                   )
2123                 {
2124                         c->swScale= simpleCopy;
2125                 }
2126
2127                 /* gray16{le,be} conversions */
2128                 if(isGray16(srcFormat) && (isPlanarYUV(dstFormat) || (dstFormat == PIX_FMT_GRAY8)))
2129                 {
2130                         c->swScale= gray16togray;
2131                 }
2132                 if((isPlanarYUV(srcFormat) || (srcFormat == PIX_FMT_GRAY8)) && isGray16(dstFormat))
2133                 {
2134                         c->swScale= graytogray16;
2135                 }
2136                 if(srcFormat != dstFormat && isGray16(srcFormat) && isGray16(dstFormat))
2137                 {
2138                         c->swScale= gray16swap;
2139                 }
2140
2141                 if(c->swScale){
2142                         if(flags&SWS_PRINT_INFO)
2143                                 av_log(c, AV_LOG_INFO, "SwScaler: using unscaled %s -> %s special converter\n",
2144                                         sws_format_name(srcFormat), sws_format_name(dstFormat));
2145                         return c;
2146                 }
2147         }
2148
2149         if(flags & SWS_CPU_CAPS_MMX2)
2150         {
2151                 c->canMMX2BeUsed= (dstW >=srcW && (dstW&31)==0 && (srcW&15)==0) ? 1 : 0;
2152                 if(!c->canMMX2BeUsed && dstW >=srcW && (srcW&15)==0 && (flags&SWS_FAST_BILINEAR))
2153                 {
2154                         if(flags&SWS_PRINT_INFO)
2155                                 av_log(c, AV_LOG_INFO, "SwScaler: output Width is not a multiple of 32 -> no MMX2 scaler\n");
2156                 }
2157                 if(usesHFilter) c->canMMX2BeUsed=0;
2158         }
2159         else
2160                 c->canMMX2BeUsed=0;
2161
2162         c->chrXInc= ((c->chrSrcW<<16) + (c->chrDstW>>1))/c->chrDstW;
2163         c->chrYInc= ((c->chrSrcH<<16) + (c->chrDstH>>1))/c->chrDstH;
2164
2165         // match pixel 0 of the src to pixel 0 of dst and match pixel n-2 of src to pixel n-2 of dst
2166         // but only for the FAST_BILINEAR mode otherwise do correct scaling
2167         // n-2 is the last chrominance sample available
2168         // this is not perfect, but noone shuld notice the difference, the more correct variant
2169         // would be like the vertical one, but that would require some special code for the
2170         // first and last pixel
2171         if(flags&SWS_FAST_BILINEAR)
2172         {
2173                 if(c->canMMX2BeUsed)
2174                 {
2175                         c->lumXInc+= 20;
2176                         c->chrXInc+= 20;
2177                 }
2178                 //we don't use the x86asm scaler if mmx is available
2179                 else if(flags & SWS_CPU_CAPS_MMX)
2180                 {
2181                         c->lumXInc = ((srcW-2)<<16)/(dstW-2) - 20;
2182                         c->chrXInc = ((c->chrSrcW-2)<<16)/(c->chrDstW-2) - 20;
2183                 }
2184         }
2185
2186         /* precalculate horizontal scaler filter coefficients */
2187         {
2188                 const int filterAlign=
2189                   (flags & SWS_CPU_CAPS_MMX) ? 4 :
2190                   (flags & SWS_CPU_CAPS_ALTIVEC) ? 8 :
2191                   1;
2192
2193                 initFilter(&c->hLumFilter, &c->hLumFilterPos, &c->hLumFilterSize, c->lumXInc,
2194                                  srcW      ,       dstW, filterAlign, 1<<14,
2195                                  (flags&SWS_BICUBLIN) ? (flags|SWS_BICUBIC)  : flags,
2196                                  srcFilter->lumH, dstFilter->lumH, c->param);
2197                 initFilter(&c->hChrFilter, &c->hChrFilterPos, &c->hChrFilterSize, c->chrXInc,
2198                                  c->chrSrcW, c->chrDstW, filterAlign, 1<<14,
2199                                  (flags&SWS_BICUBLIN) ? (flags|SWS_BILINEAR) : flags,
2200                                  srcFilter->chrH, dstFilter->chrH, c->param);
2201
2202 #define MAX_FUNNY_CODE_SIZE 10000
2203 #if defined(COMPILE_MMX2)
2204 // can't downscale !!!
2205                 if(c->canMMX2BeUsed && (flags & SWS_FAST_BILINEAR))
2206                 {
2207 #ifdef MAP_ANONYMOUS
2208                         c->funnyYCode = (uint8_t*)mmap(NULL, MAX_FUNNY_CODE_SIZE, PROT_EXEC | PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, 0, 0);
2209                         c->funnyUVCode = (uint8_t*)mmap(NULL, MAX_FUNNY_CODE_SIZE, PROT_EXEC | PROT_READ | PROT_WRITE, MAP_PRIVATE | MAP_ANONYMOUS, 0, 0);
2210 #else
2211                         c->funnyYCode = av_malloc(MAX_FUNNY_CODE_SIZE);
2212                         c->funnyUVCode = av_malloc(MAX_FUNNY_CODE_SIZE);
2213 #endif
2214
2215                         c->lumMmx2Filter   = av_malloc((dstW        /8+8)*sizeof(int16_t));
2216                         c->chrMmx2Filter   = av_malloc((c->chrDstW  /4+8)*sizeof(int16_t));
2217                         c->lumMmx2FilterPos= av_malloc((dstW      /2/8+8)*sizeof(int32_t));
2218                         c->chrMmx2FilterPos= av_malloc((c->chrDstW/2/4+8)*sizeof(int32_t));
2219
2220                         initMMX2HScaler(      dstW, c->lumXInc, c->funnyYCode , c->lumMmx2Filter, c->lumMmx2FilterPos, 8);
2221                         initMMX2HScaler(c->chrDstW, c->chrXInc, c->funnyUVCode, c->chrMmx2Filter, c->chrMmx2FilterPos, 4);
2222                 }
2223 #endif /* defined(COMPILE_MMX2) */
2224         } // Init Horizontal stuff
2225
2226
2227
2228         /* precalculate vertical scaler filter coefficients */
2229         {
2230                 const int filterAlign=
2231                   (flags & SWS_CPU_CAPS_MMX) && (flags & SWS_ACCURATE_RND) ? 2 :
2232                   (flags & SWS_CPU_CAPS_ALTIVEC) ? 8 :
2233                   1;
2234
2235                 initFilter(&c->vLumFilter, &c->vLumFilterPos, &c->vLumFilterSize, c->lumYInc,
2236                                 srcH      ,        dstH, filterAlign, (1<<12)-4,
2237                                 (flags&SWS_BICUBLIN) ? (flags|SWS_BICUBIC)  : flags,
2238                                 srcFilter->lumV, dstFilter->lumV, c->param);
2239                 initFilter(&c->vChrFilter, &c->vChrFilterPos, &c->vChrFilterSize, c->chrYInc,
2240                                 c->chrSrcH, c->chrDstH, filterAlign, (1<<12)-4,
2241                                 (flags&SWS_BICUBLIN) ? (flags|SWS_BILINEAR) : flags,
2242                                 srcFilter->chrV, dstFilter->chrV, c->param);
2243
2244 #ifdef HAVE_ALTIVEC
2245                 c->vYCoeffsBank = av_malloc(sizeof (vector signed short)*c->vLumFilterSize*c->dstH);
2246                 c->vCCoeffsBank = av_malloc(sizeof (vector signed short)*c->vChrFilterSize*c->chrDstH);
2247
2248                 for (i=0;i<c->vLumFilterSize*c->dstH;i++) {
2249                   int j;
2250                   short *p = (short *)&c->vYCoeffsBank[i];
2251                   for (j=0;j<8;j++)
2252                     p[j] = c->vLumFilter[i];
2253                 }
2254
2255                 for (i=0;i<c->vChrFilterSize*c->chrDstH;i++) {
2256                   int j;
2257                   short *p = (short *)&c->vCCoeffsBank[i];
2258                   for (j=0;j<8;j++)
2259                     p[j] = c->vChrFilter[i];
2260                 }
2261 #endif
2262         }
2263
2264         // Calculate Buffer Sizes so that they won't run out while handling these damn slices
2265         c->vLumBufSize= c->vLumFilterSize;
2266         c->vChrBufSize= c->vChrFilterSize;
2267         for(i=0; i<dstH; i++)
2268         {
2269                 int chrI= i*c->chrDstH / dstH;
2270                 int nextSlice= FFMAX(c->vLumFilterPos[i   ] + c->vLumFilterSize - 1,
2271                                  ((c->vChrFilterPos[chrI] + c->vChrFilterSize - 1)<<c->chrSrcVSubSample));
2272
2273                 nextSlice>>= c->chrSrcVSubSample;
2274                 nextSlice<<= c->chrSrcVSubSample;
2275                 if(c->vLumFilterPos[i   ] + c->vLumBufSize < nextSlice)
2276                         c->vLumBufSize= nextSlice - c->vLumFilterPos[i   ];
2277                 if(c->vChrFilterPos[chrI] + c->vChrBufSize < (nextSlice>>c->chrSrcVSubSample))
2278                         c->vChrBufSize= (nextSlice>>c->chrSrcVSubSample) - c->vChrFilterPos[chrI];
2279         }
2280
2281         // allocate pixbufs (we use dynamic allocation because otherwise we would need to
2282         c->lumPixBuf= av_malloc(c->vLumBufSize*2*sizeof(int16_t*));
2283         c->chrPixBuf= av_malloc(c->vChrBufSize*2*sizeof(int16_t*));
2284         //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)
2285         /* align at 16 bytes for AltiVec */
2286         for(i=0; i<c->vLumBufSize; i++)
2287                 c->lumPixBuf[i]= c->lumPixBuf[i+c->vLumBufSize]= av_mallocz(4000);
2288         for(i=0; i<c->vChrBufSize; i++)
2289                 c->chrPixBuf[i]= c->chrPixBuf[i+c->vChrBufSize]= av_malloc(8000);
2290
2291         //try to avoid drawing green stuff between the right end and the stride end
2292         for(i=0; i<c->vChrBufSize; i++) memset(c->chrPixBuf[i], 64, 8000);
2293
2294         ASSERT(c->chrDstH <= dstH)
2295
2296         if(flags&SWS_PRINT_INFO)
2297         {
2298 #ifdef DITHER1XBPP
2299                 char *dither= " dithered";
2300 #else
2301                 char *dither= "";
2302 #endif
2303                 if(flags&SWS_FAST_BILINEAR)
2304                         av_log(c, AV_LOG_INFO, "SwScaler: FAST_BILINEAR scaler, ");
2305                 else if(flags&SWS_BILINEAR)
2306                         av_log(c, AV_LOG_INFO, "SwScaler: BILINEAR scaler, ");
2307                 else if(flags&SWS_BICUBIC)
2308                         av_log(c, AV_LOG_INFO, "SwScaler: BICUBIC scaler, ");
2309                 else if(flags&SWS_X)
2310                         av_log(c, AV_LOG_INFO, "SwScaler: Experimental scaler, ");
2311                 else if(flags&SWS_POINT)
2312                         av_log(c, AV_LOG_INFO, "SwScaler: Nearest Neighbor / POINT scaler, ");
2313                 else if(flags&SWS_AREA)
2314                         av_log(c, AV_LOG_INFO, "SwScaler: Area Averageing scaler, ");
2315                 else if(flags&SWS_BICUBLIN)
2316                         av_log(c, AV_LOG_INFO, "SwScaler: luma BICUBIC / chroma BILINEAR scaler, ");
2317                 else if(flags&SWS_GAUSS)
2318                         av_log(c, AV_LOG_INFO, "SwScaler: Gaussian scaler, ");
2319                 else if(flags&SWS_SINC)
2320                         av_log(c, AV_LOG_INFO, "SwScaler: Sinc scaler, ");
2321                 else if(flags&SWS_LANCZOS)
2322                         av_log(c, AV_LOG_INFO, "SwScaler: Lanczos scaler, ");
2323                 else if(flags&SWS_SPLINE)
2324                         av_log(c, AV_LOG_INFO, "SwScaler: Bicubic spline scaler, ");
2325                 else
2326                         av_log(c, AV_LOG_INFO, "SwScaler: ehh flags invalid?! ");
2327
2328                 if(dstFormat==PIX_FMT_BGR555 || dstFormat==PIX_FMT_BGR565)
2329                         av_log(c, AV_LOG_INFO, "from %s to%s %s ",
2330                                 sws_format_name(srcFormat), dither, sws_format_name(dstFormat));
2331                 else
2332                         av_log(c, AV_LOG_INFO, "from %s to %s ",
2333                                 sws_format_name(srcFormat), sws_format_name(dstFormat));
2334
2335                 if(flags & SWS_CPU_CAPS_MMX2)
2336                         av_log(c, AV_LOG_INFO, "using MMX2\n");
2337                 else if(flags & SWS_CPU_CAPS_3DNOW)
2338                         av_log(c, AV_LOG_INFO, "using 3DNOW\n");
2339                 else if(flags & SWS_CPU_CAPS_MMX)
2340                         av_log(c, AV_LOG_INFO, "using MMX\n");
2341                 else if(flags & SWS_CPU_CAPS_ALTIVEC)
2342                         av_log(c, AV_LOG_INFO, "using AltiVec\n");
2343                 else
2344                         av_log(c, AV_LOG_INFO, "using C\n");
2345         }
2346
2347         if(flags & SWS_PRINT_INFO)
2348         {
2349                 if(flags & SWS_CPU_CAPS_MMX)
2350                 {
2351                         if(c->canMMX2BeUsed && (flags&SWS_FAST_BILINEAR))
2352                                 av_log(c, AV_LOG_VERBOSE, "SwScaler: using FAST_BILINEAR MMX2 scaler for horizontal scaling\n");
2353                         else
2354                         {
2355                                 if(c->hLumFilterSize==4)
2356                                         av_log(c, AV_LOG_VERBOSE, "SwScaler: using 4-tap MMX scaler for horizontal luminance scaling\n");
2357                                 else if(c->hLumFilterSize==8)
2358                                         av_log(c, AV_LOG_VERBOSE, "SwScaler: using 8-tap MMX scaler for horizontal luminance scaling\n");
2359                                 else
2360                                         av_log(c, AV_LOG_VERBOSE, "SwScaler: using n-tap MMX scaler for horizontal luminance scaling\n");
2361
2362                                 if(c->hChrFilterSize==4)
2363                                         av_log(c, AV_LOG_VERBOSE, "SwScaler: using 4-tap MMX scaler for horizontal chrominance scaling\n");
2364                                 else if(c->hChrFilterSize==8)
2365                                         av_log(c, AV_LOG_VERBOSE, "SwScaler: using 8-tap MMX scaler for horizontal chrominance scaling\n");
2366                                 else
2367                                         av_log(c, AV_LOG_VERBOSE, "SwScaler: using n-tap MMX scaler for horizontal chrominance scaling\n");
2368                         }
2369                 }
2370                 else
2371                 {
2372 #if defined(ARCH_X86)
2373                         av_log(c, AV_LOG_VERBOSE, "SwScaler: using X86-Asm scaler for horizontal scaling\n");
2374 #else
2375                         if(flags & SWS_FAST_BILINEAR)
2376                                 av_log(c, AV_LOG_VERBOSE, "SwScaler: using FAST_BILINEAR C scaler for horizontal scaling\n");
2377                         else
2378                                 av_log(c, AV_LOG_VERBOSE, "SwScaler: using C scaler for horizontal scaling\n");
2379 #endif
2380                 }
2381                 if(isPlanarYUV(dstFormat))
2382                 {
2383                         if(c->vLumFilterSize==1)
2384                                 av_log(c, AV_LOG_VERBOSE, "SwScaler: using 1-tap %s \"scaler\" for vertical scaling (YV12 like)\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");
2385                         else
2386                                 av_log(c, AV_LOG_VERBOSE, "SwScaler: using n-tap %s scaler for vertical scaling (YV12 like)\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");
2387                 }
2388                 else
2389                 {
2390                         if(c->vLumFilterSize==1 && c->vChrFilterSize==2)
2391                                 av_log(c, AV_LOG_VERBOSE, "SwScaler: using 1-tap %s \"scaler\" for vertical luminance scaling (BGR)\n"
2392                                        "SwScaler:       2-tap scaler for vertical chrominance scaling (BGR)\n",(flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");
2393                         else if(c->vLumFilterSize==2 && c->vChrFilterSize==2)
2394                                 av_log(c, AV_LOG_VERBOSE, "SwScaler: using 2-tap linear %s scaler for vertical scaling (BGR)\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");
2395                         else
2396                                 av_log(c, AV_LOG_VERBOSE, "SwScaler: using n-tap %s scaler for vertical scaling (BGR)\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");
2397                 }
2398
2399                 if(dstFormat==PIX_FMT_BGR24)
2400                         av_log(c, AV_LOG_VERBOSE, "SwScaler: using %s YV12->BGR24 Converter\n",
2401                                 (flags & SWS_CPU_CAPS_MMX2) ? "MMX2" : ((flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C"));
2402                 else if(dstFormat==PIX_FMT_RGB32)
2403                         av_log(c, AV_LOG_VERBOSE, "SwScaler: using %s YV12->BGR32 Converter\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");
2404                 else if(dstFormat==PIX_FMT_BGR565)
2405                         av_log(c, AV_LOG_VERBOSE, "SwScaler: using %s YV12->BGR16 Converter\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");
2406                 else if(dstFormat==PIX_FMT_BGR555)
2407                         av_log(c, AV_LOG_VERBOSE, "SwScaler: using %s YV12->BGR15 Converter\n", (flags & SWS_CPU_CAPS_MMX) ? "MMX" : "C");
2408
2409                 av_log(c, AV_LOG_VERBOSE, "SwScaler: %dx%d -> %dx%d\n", srcW, srcH, dstW, dstH);
2410         }
2411         if(flags & SWS_PRINT_INFO)
2412         {
2413                 av_log(c, AV_LOG_DEBUG, "SwScaler:Lum srcW=%d srcH=%d dstW=%d dstH=%d xInc=%d yInc=%d\n",
2414                         c->srcW, c->srcH, c->dstW, c->dstH, c->lumXInc, c->lumYInc);
2415                 av_log(c, AV_LOG_DEBUG, "SwScaler:Chr srcW=%d srcH=%d dstW=%d dstH=%d xInc=%d yInc=%d\n",
2416                         c->chrSrcW, c->chrSrcH, c->chrDstW, c->chrDstH, c->chrXInc, c->chrYInc);
2417         }
2418
2419         c->swScale= getSwsFunc(flags);
2420         return c;
2421 }
2422
2423 /**
2424  * swscale warper, so we don't need to export the SwsContext.
2425  * assumes planar YUV to be in YUV order instead of YVU
2426  */
2427 int sws_scale(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,
2428                            int srcSliceH, uint8_t* dst[], int dstStride[]){
2429         if (c->sliceDir == 0 && srcSliceY != 0 && srcSliceY + srcSliceH != c->srcH) {
2430             av_log(c, AV_LOG_ERROR, "swScaler: slices start in the middle!\n");
2431             return 0;
2432         }
2433         if (c->sliceDir == 0) {
2434             if (srcSliceY == 0) c->sliceDir = 1; else c->sliceDir = -1;
2435         }
2436
2437         // copy strides, so they can safely be modified
2438         if (c->sliceDir == 1) {
2439             uint8_t* src2[4]= {src[0], src[1], src[2]};
2440             // slices go from top to bottom
2441             int srcStride2[4]= {srcStride[0], srcStride[1], srcStride[2]};
2442             int dstStride2[4]= {dstStride[0], dstStride[1], dstStride[2]};
2443             return c->swScale(c, src2, srcStride2, srcSliceY, srcSliceH, dst, dstStride2);
2444         } else {
2445             // slices go from bottom to top => we flip the image internally
2446             uint8_t* src2[4]= {src[0] + (srcSliceH-1)*srcStride[0],
2447                                src[1] + ((srcSliceH>>c->chrSrcVSubSample)-1)*srcStride[1],
2448                                src[2] + ((srcSliceH>>c->chrSrcVSubSample)-1)*srcStride[2]
2449             };
2450             uint8_t* dst2[4]= {dst[0] + (c->dstH-1)*dstStride[0],
2451                                dst[1] + ((c->dstH>>c->chrDstVSubSample)-1)*dstStride[1],
2452                                dst[2] + ((c->dstH>>c->chrDstVSubSample)-1)*dstStride[2]};
2453             int srcStride2[4]= {-srcStride[0], -srcStride[1], -srcStride[2]};
2454             int dstStride2[4]= {-dstStride[0], -dstStride[1], -dstStride[2]};
2455
2456             return c->swScale(c, src2, srcStride2, c->srcH-srcSliceY-srcSliceH, srcSliceH, dst2, dstStride2);
2457         }
2458 }
2459
2460 /**
2461  * swscale warper, so we don't need to export the SwsContext
2462  */
2463 int sws_scale_ordered(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY,
2464                            int srcSliceH, uint8_t* dst[], int dstStride[]){
2465         return sws_scale(c, src, srcStride, srcSliceY, srcSliceH, dst, dstStride);
2466 }
2467
2468 SwsFilter *sws_getDefaultFilter(float lumaGBlur, float chromaGBlur,
2469                                 float lumaSharpen, float chromaSharpen,
2470                                 float chromaHShift, float chromaVShift,
2471                                 int verbose)
2472 {
2473         SwsFilter *filter= av_malloc(sizeof(SwsFilter));
2474
2475         if(lumaGBlur!=0.0){
2476                 filter->lumH= sws_getGaussianVec(lumaGBlur, 3.0);
2477                 filter->lumV= sws_getGaussianVec(lumaGBlur, 3.0);
2478         }else{
2479                 filter->lumH= sws_getIdentityVec();
2480                 filter->lumV= sws_getIdentityVec();
2481         }
2482
2483         if(chromaGBlur!=0.0){
2484                 filter->chrH= sws_getGaussianVec(chromaGBlur, 3.0);
2485                 filter->chrV= sws_getGaussianVec(chromaGBlur, 3.0);
2486         }else{
2487                 filter->chrH= sws_getIdentityVec();
2488                 filter->chrV= sws_getIdentityVec();
2489         }
2490
2491         if(chromaSharpen!=0.0){
2492                 SwsVector *id= sws_getIdentityVec();
2493                 sws_scaleVec(filter->chrH, -chromaSharpen);
2494                 sws_scaleVec(filter->chrV, -chromaSharpen);
2495                 sws_addVec(filter->chrH, id);
2496                 sws_addVec(filter->chrV, id);
2497                 sws_freeVec(id);
2498         }
2499
2500         if(lumaSharpen!=0.0){
2501                 SwsVector *id= sws_getIdentityVec();
2502                 sws_scaleVec(filter->lumH, -lumaSharpen);
2503                 sws_scaleVec(filter->lumV, -lumaSharpen);
2504                 sws_addVec(filter->lumH, id);
2505                 sws_addVec(filter->lumV, id);
2506                 sws_freeVec(id);
2507         }
2508
2509         if(chromaHShift != 0.0)
2510                 sws_shiftVec(filter->chrH, (int)(chromaHShift+0.5));
2511
2512         if(chromaVShift != 0.0)
2513                 sws_shiftVec(filter->chrV, (int)(chromaVShift+0.5));
2514
2515         sws_normalizeVec(filter->chrH, 1.0);
2516         sws_normalizeVec(filter->chrV, 1.0);
2517         sws_normalizeVec(filter->lumH, 1.0);
2518         sws_normalizeVec(filter->lumV, 1.0);
2519
2520         if(verbose) sws_printVec(filter->chrH);
2521         if(verbose) sws_printVec(filter->lumH);
2522
2523         return filter;
2524 }
2525
2526 /**
2527  * returns a normalized gaussian curve used to filter stuff
2528  * quality=3 is high quality, lowwer is lowwer quality
2529  */
2530 SwsVector *sws_getGaussianVec(double variance, double quality){
2531         const int length= (int)(variance*quality + 0.5) | 1;
2532         int i;
2533         double *coeff= av_malloc(length*sizeof(double));
2534         double middle= (length-1)*0.5;
2535         SwsVector *vec= av_malloc(sizeof(SwsVector));
2536
2537         vec->coeff= coeff;
2538         vec->length= length;
2539
2540         for(i=0; i<length; i++)
2541         {
2542                 double dist= i-middle;
2543                 coeff[i]= exp( -dist*dist/(2*variance*variance) ) / sqrt(2*variance*PI);
2544         }
2545
2546         sws_normalizeVec(vec, 1.0);
2547
2548         return vec;
2549 }
2550
2551 SwsVector *sws_getConstVec(double c, int length){
2552         int i;
2553         double *coeff= av_malloc(length*sizeof(double));
2554         SwsVector *vec= av_malloc(sizeof(SwsVector));
2555
2556         vec->coeff= coeff;
2557         vec->length= length;
2558
2559         for(i=0; i<length; i++)
2560                 coeff[i]= c;
2561
2562         return vec;
2563 }
2564
2565
2566 SwsVector *sws_getIdentityVec(void){
2567         return sws_getConstVec(1.0, 1);
2568 }
2569
2570 double sws_dcVec(SwsVector *a){
2571         int i;
2572         double sum=0;
2573
2574         for(i=0; i<a->length; i++)
2575                 sum+= a->coeff[i];
2576
2577         return sum;
2578 }
2579
2580 void sws_scaleVec(SwsVector *a, double scalar){
2581         int i;
2582
2583         for(i=0; i<a->length; i++)
2584                 a->coeff[i]*= scalar;
2585 }
2586
2587 void sws_normalizeVec(SwsVector *a, double height){
2588         sws_scaleVec(a, height/sws_dcVec(a));
2589 }
2590
2591 static SwsVector *sws_getConvVec(SwsVector *a, SwsVector *b){
2592         int length= a->length + b->length - 1;
2593         double *coeff= av_malloc(length*sizeof(double));
2594         int i, j;
2595         SwsVector *vec= av_malloc(sizeof(SwsVector));
2596
2597         vec->coeff= coeff;
2598         vec->length= length;
2599
2600         for(i=0; i<length; i++) coeff[i]= 0.0;
2601
2602         for(i=0; i<a->length; i++)
2603         {
2604                 for(j=0; j<b->length; j++)
2605                 {
2606                         coeff[i+j]+= a->coeff[i]*b->coeff[j];
2607                 }
2608         }
2609
2610         return vec;
2611 }
2612
2613 static SwsVector *sws_sumVec(SwsVector *a, SwsVector *b){
2614         int length= FFMAX(a->length, b->length);
2615         double *coeff= av_malloc(length*sizeof(double));
2616         int i;
2617         SwsVector *vec= av_malloc(sizeof(SwsVector));
2618
2619         vec->coeff= coeff;
2620         vec->length= length;
2621
2622         for(i=0; i<length; i++) coeff[i]= 0.0;
2623
2624         for(i=0; i<a->length; i++) coeff[i + (length-1)/2 - (a->length-1)/2]+= a->coeff[i];
2625         for(i=0; i<b->length; i++) coeff[i + (length-1)/2 - (b->length-1)/2]+= b->coeff[i];
2626
2627         return vec;
2628 }
2629
2630 static SwsVector *sws_diffVec(SwsVector *a, SwsVector *b){
2631         int length= FFMAX(a->length, b->length);
2632         double *coeff= av_malloc(length*sizeof(double));
2633         int i;
2634         SwsVector *vec= av_malloc(sizeof(SwsVector));
2635
2636         vec->coeff= coeff;
2637         vec->length= length;
2638
2639         for(i=0; i<length; i++) coeff[i]= 0.0;
2640
2641         for(i=0; i<a->length; i++) coeff[i + (length-1)/2 - (a->length-1)/2]+= a->coeff[i];
2642         for(i=0; i<b->length; i++) coeff[i + (length-1)/2 - (b->length-1)/2]-= b->coeff[i];
2643
2644         return vec;
2645 }
2646
2647 /* shift left / or right if "shift" is negative */
2648 static SwsVector *sws_getShiftedVec(SwsVector *a, int shift){
2649         int length= a->length + FFABS(shift)*2;
2650         double *coeff= av_malloc(length*sizeof(double));
2651         int i;
2652         SwsVector *vec= av_malloc(sizeof(SwsVector));
2653
2654         vec->coeff= coeff;
2655         vec->length= length;
2656
2657         for(i=0; i<length; i++) coeff[i]= 0.0;
2658
2659         for(i=0; i<a->length; i++)
2660         {
2661                 coeff[i + (length-1)/2 - (a->length-1)/2 - shift]= a->coeff[i];
2662         }
2663
2664         return vec;
2665 }
2666
2667 void sws_shiftVec(SwsVector *a, int shift){
2668         SwsVector *shifted= sws_getShiftedVec(a, shift);
2669         av_free(a->coeff);
2670         a->coeff= shifted->coeff;
2671         a->length= shifted->length;
2672         av_free(shifted);
2673 }
2674
2675 void sws_addVec(SwsVector *a, SwsVector *b){
2676         SwsVector *sum= sws_sumVec(a, b);
2677         av_free(a->coeff);
2678         a->coeff= sum->coeff;
2679         a->length= sum->length;
2680         av_free(sum);
2681 }
2682
2683 void sws_subVec(SwsVector *a, SwsVector *b){
2684         SwsVector *diff= sws_diffVec(a, b);
2685         av_free(a->coeff);
2686         a->coeff= diff->coeff;
2687         a->length= diff->length;
2688         av_free(diff);
2689 }
2690
2691 void sws_convVec(SwsVector *a, SwsVector *b){
2692         SwsVector *conv= sws_getConvVec(a, b);
2693         av_free(a->coeff);
2694         a->coeff= conv->coeff;
2695         a->length= conv->length;
2696         av_free(conv);
2697 }
2698
2699 SwsVector *sws_cloneVec(SwsVector *a){
2700         double *coeff= av_malloc(a->length*sizeof(double));
2701         int i;
2702         SwsVector *vec= av_malloc(sizeof(SwsVector));
2703
2704         vec->coeff= coeff;
2705         vec->length= a->length;
2706
2707         for(i=0; i<a->length; i++) coeff[i]= a->coeff[i];
2708
2709         return vec;
2710 }
2711
2712 void sws_printVec(SwsVector *a){
2713         int i;
2714         double max=0;
2715         double min=0;
2716         double range;
2717
2718         for(i=0; i<a->length; i++)
2719                 if(a->coeff[i]>max) max= a->coeff[i];
2720
2721         for(i=0; i<a->length; i++)
2722                 if(a->coeff[i]<min) min= a->coeff[i];
2723
2724         range= max - min;
2725
2726         for(i=0; i<a->length; i++)
2727         {
2728                 int x= (int)((a->coeff[i]-min)*60.0/range +0.5);
2729                 av_log(NULL, AV_LOG_DEBUG, "%1.3f ", a->coeff[i]);
2730                 for(;x>0; x--) av_log(NULL, AV_LOG_DEBUG, " ");
2731                 av_log(NULL, AV_LOG_DEBUG, "|\n");
2732         }
2733 }
2734
2735 void sws_freeVec(SwsVector *a){
2736         if(!a) return;
2737         av_free(a->coeff);
2738         a->coeff=NULL;
2739         a->length=0;
2740         av_free(a);
2741 }
2742
2743 void sws_freeFilter(SwsFilter *filter){
2744         if(!filter) return;
2745
2746         if(filter->lumH) sws_freeVec(filter->lumH);
2747         if(filter->lumV) sws_freeVec(filter->lumV);
2748         if(filter->chrH) sws_freeVec(filter->chrH);
2749         if(filter->chrV) sws_freeVec(filter->chrV);
2750         av_free(filter);
2751 }
2752
2753
2754 void sws_freeContext(SwsContext *c){
2755         int i;
2756         if(!c) return;
2757
2758         if(c->lumPixBuf)
2759         {
2760                 for(i=0; i<c->vLumBufSize; i++)
2761                 {
2762                         av_free(c->lumPixBuf[i]);
2763                         c->lumPixBuf[i]=NULL;
2764                 }
2765                 av_free(c->lumPixBuf);
2766                 c->lumPixBuf=NULL;
2767         }
2768
2769         if(c->chrPixBuf)
2770         {
2771                 for(i=0; i<c->vChrBufSize; i++)
2772                 {
2773                         av_free(c->chrPixBuf[i]);
2774                         c->chrPixBuf[i]=NULL;
2775                 }
2776                 av_free(c->chrPixBuf);
2777                 c->chrPixBuf=NULL;
2778         }
2779
2780         av_free(c->vLumFilter);
2781         c->vLumFilter = NULL;
2782         av_free(c->vChrFilter);
2783         c->vChrFilter = NULL;
2784         av_free(c->hLumFilter);
2785         c->hLumFilter = NULL;
2786         av_free(c->hChrFilter);
2787         c->hChrFilter = NULL;
2788 #ifdef HAVE_ALTIVEC
2789         av_free(c->vYCoeffsBank);
2790         c->vYCoeffsBank = NULL;
2791         av_free(c->vCCoeffsBank);
2792         c->vCCoeffsBank = NULL;
2793 #endif
2794
2795         av_free(c->vLumFilterPos);
2796         c->vLumFilterPos = NULL;
2797         av_free(c->vChrFilterPos);
2798         c->vChrFilterPos = NULL;
2799         av_free(c->hLumFilterPos);
2800         c->hLumFilterPos = NULL;
2801         av_free(c->hChrFilterPos);
2802         c->hChrFilterPos = NULL;
2803
2804 #if defined(ARCH_X86) && defined(CONFIG_GPL)
2805 #ifdef MAP_ANONYMOUS
2806         if(c->funnyYCode) munmap(c->funnyYCode, MAX_FUNNY_CODE_SIZE);
2807         if(c->funnyUVCode) munmap(c->funnyUVCode, MAX_FUNNY_CODE_SIZE);
2808 #else
2809         av_free(c->funnyYCode);
2810         av_free(c->funnyUVCode);
2811 #endif
2812         c->funnyYCode=NULL;
2813         c->funnyUVCode=NULL;
2814 #endif /* defined(ARCH_X86) */
2815
2816         av_free(c->lumMmx2Filter);
2817         c->lumMmx2Filter=NULL;
2818         av_free(c->chrMmx2Filter);
2819         c->chrMmx2Filter=NULL;
2820         av_free(c->lumMmx2FilterPos);
2821         c->lumMmx2FilterPos=NULL;
2822         av_free(c->chrMmx2FilterPos);
2823         c->chrMmx2FilterPos=NULL;
2824         av_free(c->yuvTable);
2825         c->yuvTable=NULL;
2826
2827         av_free(c);
2828 }
2829
2830 /**
2831  * Checks if context is valid or reallocs a new one instead.
2832  * If context is NULL, just calls sws_getContext() to get a new one.
2833  * Otherwise, checks if the parameters are the same already saved in context.
2834  * If that is the case, returns the current context.
2835  * Otherwise, frees context and gets a new one.
2836  *
2837  * Be warned that srcFilter, dstFilter are not checked, they are
2838  * asumed to remain valid.
2839  */
2840 struct SwsContext *sws_getCachedContext(struct SwsContext *context,
2841                         int srcW, int srcH, int srcFormat,
2842                         int dstW, int dstH, int dstFormat, int flags,
2843                         SwsFilter *srcFilter, SwsFilter *dstFilter, double *param)
2844 {
2845     if (context != NULL) {
2846         if ((context->srcW != srcW) || (context->srcH != srcH) ||
2847             (context->srcFormat != srcFormat) ||
2848             (context->dstW != dstW) || (context->dstH != dstH) ||
2849             (context->dstFormat != dstFormat) || (context->flags != flags) ||
2850             (context->param != param))
2851         {
2852             sws_freeContext(context);
2853             context = NULL;
2854         }
2855     }
2856     if (context == NULL) {
2857         return sws_getContext(srcW, srcH, srcFormat,
2858                         dstW, dstH, dstFormat, flags,
2859                         srcFilter, dstFilter, param);
2860     }
2861     return context;
2862 }
2863