yuv2rgb.c

   1 /*
   2  * software YUV to RGB converter
   3  *
   4  * Copyright (C) 2009 Konstantin Shishkov
   5  *
   6  * 1,4,8bpp support and context / deglobalize stuff
   7  * by Michael Niedermayer (michaelni@gmx.at)
   8  *
   9  * This file is part of FFmpeg.
  10  *
  11  * FFmpeg is free software; you can redistribute it and/or
  12  * modify it under the terms of the GNU Lesser General Public
  13  * License as published by the Free Software Foundation; either
  14  * version 2.1 of the License, or (at your option) any later version.
  15  *
  16  * FFmpeg is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  19  * Lesser General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU Lesser General Public
  22  * License along with FFmpeg; if not, write to the Free Software
  23  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  24  */
  25
  26 #include <stdio.h>
  27 #include <stdlib.h>
  28 #include <inttypes.h>
  29 #include <assert.h>
  30
  31 #include "config.h"
  32 #include "rgb2rgb.h"
  33 #include "swscale.h"
  34 #include "swscale_internal.h"
  35 #include "libavutil/x86_cpu.h"
  36
  37 extern const uint8_t dither_8x8_32[8][8];
  38 extern const uint8_t dither_8x8_73[8][8];
  39 extern const uint8_t dither_8x8_220[8][8];
  40
  41 const int32_t ff_yuv2rgb_coeffs[8][4] = {
  42     {117504, 138453, 13954, 34903}, /* no sequence_display_extension */
  43     {117504, 138453, 13954, 34903}, /* ITU-R Rec. 709 (1990) */
  44     {104597, 132201, 25675, 53279}, /* unspecified */
  45     {104597, 132201, 25675, 53279}, /* reserved */
  46     {104448, 132798, 24759, 53109}, /* FCC */
  47     {104597, 132201, 25675, 53279}, /* ITU-R Rec. 624-4 System B, G */
  48     {104597, 132201, 25675, 53279}, /* SMPTE 170M */
  49     {117579, 136230, 16907, 35559}  /* SMPTE 240M (1987) */
  50 };
  51
  52 #define LOADCHROMA(i)                               \
  53     U = pu[i];                                      \
  54     V = pv[i];                                      \
  55     r = (void *)c->table_rV[V];                     \
  56     g = (void *)(c->table_gU[U] + c->table_gV[V]);  \
  57     b = (void *)c->table_bU[U];
  58
  59 #define PUTRGB(dst,src,i)            \
  60     Y = src[2*i];                    \
  61     dst[2*i  ] = r[Y] + g[Y] + b[Y]; \
  62     Y = src[2*i+1];                  \
  63     dst[2*i+1] = r[Y] + g[Y] + b[Y];
  64
  65 #define PUTRGB24(dst,src,i)                                  \
  66     Y = src[2*i];                                            \
  67     dst[6*i+0] = r[Y]; dst[6*i+1] = g[Y]; dst[6*i+2] = b[Y]; \
  68     Y = src[2*i+1];                                          \
  69     dst[6*i+3] = r[Y]; dst[6*i+4] = g[Y]; dst[6*i+5] = b[Y];
  70
  71 #define PUTBGR24(dst,src,i)                                  \
  72     Y = src[2*i];                                            \
  73     dst[6*i+0] = b[Y]; dst[6*i+1] = g[Y]; dst[6*i+2] = r[Y]; \
  74     Y = src[2*i+1];                                          \
  75     dst[6*i+3] = b[Y]; dst[6*i+4] = g[Y]; dst[6*i+5] = r[Y];
  76
  77 #define PUTRGBA(dst,ysrc,asrc,i,s)                      \
  78     Y = ysrc[2*i];                                      \
  79     dst[2*i  ] = r[Y] + g[Y] + b[Y] + (asrc[2*i  ]<<s); \
  80     Y = ysrc[2*i+1];                                    \
  81     dst[2*i+1] = r[Y] + g[Y] + b[Y] + (asrc[2*i+1]<<s);
  82
  83 #define PUTRGB48(dst,src,i)             \
  84     Y = src[2*i];                       \
  85     dst[12*i+ 0] = dst[12*i+ 1] = r[Y]; \
  86     dst[12*i+ 2] = dst[12*i+ 3] = g[Y]; \
  87     dst[12*i+ 4] = dst[12*i+ 5] = b[Y]; \
  88     Y = src[2*i+1];                     \
  89     dst[12*i+ 6] = dst[12*i+ 7] = r[Y]; \
  90     dst[12*i+ 8] = dst[12*i+ 9] = g[Y]; \
  91     dst[12*i+10] = dst[12*i+11] = b[Y];
  92
  93 #define YUV2RGBFUNC(func_name, dst_type, alpha) \
  94 static int func_name(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY, \
  95                      int srcSliceH, uint8_t* dst[], int dstStride[]) \
  96 {\
  97     int y;\
  98 \
  99     if (!alpha && c->srcFormat == PIX_FMT_YUV422P) {\
 100         srcStride[1] *= 2;\
 101         srcStride[2] *= 2;\
 102     }\
 103     for (y=0; y<srcSliceH; y+=2) {\
 104         dst_type *dst_1 = (dst_type*)(dst[0] + (y+srcSliceY  )*dstStride[0]);\
 105         dst_type *dst_2 = (dst_type*)(dst[0] + (y+srcSliceY+1)*dstStride[0]);\
 106         dst_type av_unused *r, *b;\
 107         dst_type *g;\
 108         uint8_t *py_1 = src[0] + y*srcStride[0];\
 109         uint8_t *py_2 = py_1 + srcStride[0];\
 110         uint8_t *pu = src[1] + (y>>1)*srcStride[1];\
 111         uint8_t *pv = src[2] + (y>>1)*srcStride[2];\
 112         uint8_t av_unused *pa_1, *pa_2;\
 113         unsigned int h_size = c->dstW>>3;\
 114         if (alpha) {\
 115             pa_1 = src[3] + y*srcStride[3];\
 116             pa_2 = pa_1 + srcStride[3];\
 117         }\
 118         while (h_size--) {\
 119             int av_unused U, V;\
 120             int Y;\
 121
 122 #define ENDYUV2RGBLINE(dst_delta)\
 123             pu += 4;\
 124             pv += 4;\
 125             py_1 += 8;\
 126             py_2 += 8;\
 127             dst_1 += dst_delta;\
 128             dst_2 += dst_delta;\
 129         }\
 130         if (c->dstW & 4) {\
 131             int av_unused Y, U, V;\
 132
 133 #define ENDYUV2RGBFUNC()\
 134         }\
 135     }\
 136     return srcSliceH;\
 137 }
 138
 139 #define CLOSEYUV2RGBFUNC(dst_delta)\
 140     ENDYUV2RGBLINE(dst_delta)\
 141     ENDYUV2RGBFUNC()
 142
 143 YUV2RGBFUNC(yuv2rgb_c_48, uint8_t, 0)
 144     LOADCHROMA(0);
 145     PUTRGB48(dst_1,py_1,0);
 146     PUTRGB48(dst_2,py_2,0);
 147
 148     LOADCHROMA(1);
 149     PUTRGB48(dst_2,py_2,1);
 150     PUTRGB48(dst_1,py_1,1);
 151
 152     LOADCHROMA(2);
 153     PUTRGB48(dst_1,py_1,2);
 154     PUTRGB48(dst_2,py_2,2);
 155
 156     LOADCHROMA(3);
 157     PUTRGB48(dst_2,py_2,3);
 158     PUTRGB48(dst_1,py_1,3);
 159 ENDYUV2RGBLINE(48)
 160     LOADCHROMA(0);
 161     PUTRGB48(dst_1,py_1,0);
 162     PUTRGB48(dst_2,py_2,0);
 163
 164     LOADCHROMA(1);
 165     PUTRGB48(dst_2,py_2,1);
 166     PUTRGB48(dst_1,py_1,1);
 167 ENDYUV2RGBFUNC()
 168
 169 YUV2RGBFUNC(yuv2rgb_c_32, uint32_t, 0)
 170     LOADCHROMA(0);
 171     PUTRGB(dst_1,py_1,0);
 172     PUTRGB(dst_2,py_2,0);
 173
 174     LOADCHROMA(1);
 175     PUTRGB(dst_2,py_2,1);
 176     PUTRGB(dst_1,py_1,1);
 177
 178     LOADCHROMA(2);
 179     PUTRGB(dst_1,py_1,2);
 180     PUTRGB(dst_2,py_2,2);
 181
 182     LOADCHROMA(3);
 183     PUTRGB(dst_2,py_2,3);
 184     PUTRGB(dst_1,py_1,3);
 185 ENDYUV2RGBLINE(8)
 186     LOADCHROMA(0);
 187     PUTRGB(dst_1,py_1,0);
 188     PUTRGB(dst_2,py_2,0);
 189
 190     LOADCHROMA(1);
 191     PUTRGB(dst_2,py_2,1);
 192     PUTRGB(dst_1,py_1,1);
 193 ENDYUV2RGBFUNC()
 194
 195 YUV2RGBFUNC(yuva2rgba_c, uint32_t, 1)
 196     LOADCHROMA(0);
 197     PUTRGBA(dst_1,py_1,pa_1,0,24);
 198     PUTRGBA(dst_2,py_2,pa_2,0,24);
 199
 200     LOADCHROMA(1);
 201     PUTRGBA(dst_2,py_2,pa_1,1,24);
 202     PUTRGBA(dst_1,py_1,pa_2,1,24);
 203
 204     LOADCHROMA(2);
 205     PUTRGBA(dst_1,py_1,pa_1,2,24);
 206     PUTRGBA(dst_2,py_2,pa_2,2,24);
 207
 208     LOADCHROMA(3);
 209     PUTRGBA(dst_2,py_2,pa_1,3,24);
 210     PUTRGBA(dst_1,py_1,pa_2,3,24);
 211     pa_1 += 8;\
 212     pa_2 += 8;\
 213 ENDYUV2RGBLINE(8)
 214     LOADCHROMA(0);
 215     PUTRGBA(dst_1,py_1,pa_1,0,24);
 216     PUTRGBA(dst_2,py_2,pa_2,0,24);
 217
 218     LOADCHROMA(1);
 219     PUTRGBA(dst_2,py_2,pa_1,1,24);
 220     PUTRGBA(dst_1,py_1,pa_2,1,24);
 221 ENDYUV2RGBFUNC()
 222
 223 YUV2RGBFUNC(yuva2argb_c, uint32_t, 1)
 224     LOADCHROMA(0);
 225     PUTRGBA(dst_1,py_1,pa_1,0,0);
 226     PUTRGBA(dst_2,py_2,pa_2,0,0);
 227
 228     LOADCHROMA(1);
 229     PUTRGBA(dst_2,py_2,pa_2,1,0);
 230     PUTRGBA(dst_1,py_1,pa_1,1,0);
 231
 232     LOADCHROMA(2);
 233     PUTRGBA(dst_1,py_1,pa_1,2,0);
 234     PUTRGBA(dst_2,py_2,pa_2,2,0);
 235
 236     LOADCHROMA(3);
 237     PUTRGBA(dst_2,py_2,pa_2,3,0);
 238     PUTRGBA(dst_1,py_1,pa_1,3,0);
 239     pa_1 += 8;\
 240     pa_2 += 8;\
 241 ENDYUV2RGBLINE(8)
 242     LOADCHROMA(0);
 243     PUTRGBA(dst_1,py_1,pa_1,0,0);
 244     PUTRGBA(dst_2,py_2,pa_2,0,0);
 245
 246     LOADCHROMA(1);
 247     PUTRGBA(dst_2,py_2,pa_2,1,0);
 248     PUTRGBA(dst_1,py_1,pa_1,1,0);
 249 ENDYUV2RGBFUNC()
 250
 251 YUV2RGBFUNC(yuv2rgb_c_24_rgb, uint8_t, 0)
 252     LOADCHROMA(0);
 253     PUTRGB24(dst_1,py_1,0);
 254     PUTRGB24(dst_2,py_2,0);
 255
 256     LOADCHROMA(1);
 257     PUTRGB24(dst_2,py_2,1);
 258     PUTRGB24(dst_1,py_1,1);
 259
 260     LOADCHROMA(2);
 261     PUTRGB24(dst_1,py_1,2);
 262     PUTRGB24(dst_2,py_2,2);
 263
 264     LOADCHROMA(3);
 265     PUTRGB24(dst_2,py_2,3);
 266     PUTRGB24(dst_1,py_1,3);
 267 ENDYUV2RGBLINE(24)
 268     LOADCHROMA(0);
 269     PUTRGB24(dst_1,py_1,0);
 270     PUTRGB24(dst_2,py_2,0);
 271
 272     LOADCHROMA(1);
 273     PUTRGB24(dst_2,py_2,1);
 274     PUTRGB24(dst_1,py_1,1);
 275 ENDYUV2RGBFUNC()
 276
 277 // only trivial mods from yuv2rgb_c_24_rgb
 278 YUV2RGBFUNC(yuv2rgb_c_24_bgr, uint8_t, 0)
 279     LOADCHROMA(0);
 280     PUTBGR24(dst_1,py_1,0);
 281     PUTBGR24(dst_2,py_2,0);
 282
 283     LOADCHROMA(1);
 284     PUTBGR24(dst_2,py_2,1);
 285     PUTBGR24(dst_1,py_1,1);
 286
 287     LOADCHROMA(2);
 288     PUTBGR24(dst_1,py_1,2);
 289     PUTBGR24(dst_2,py_2,2);
 290
 291     LOADCHROMA(3);
 292     PUTBGR24(dst_2,py_2,3);
 293     PUTBGR24(dst_1,py_1,3);
 294 ENDYUV2RGBLINE(24)
 295     LOADCHROMA(0);
 296     PUTBGR24(dst_1,py_1,0);
 297     PUTBGR24(dst_2,py_2,0);
 298
 299     LOADCHROMA(1);
 300     PUTBGR24(dst_2,py_2,1);
 301     PUTBGR24(dst_1,py_1,1);
 302 ENDYUV2RGBFUNC()
 303
 304 // This is exactly the same code as yuv2rgb_c_32 except for the types of
 305 // r, g, b, dst_1, dst_2
 306 YUV2RGBFUNC(yuv2rgb_c_16, uint16_t, 0)
 307     LOADCHROMA(0);
 308     PUTRGB(dst_1,py_1,0);
 309     PUTRGB(dst_2,py_2,0);
 310
 311     LOADCHROMA(1);
 312     PUTRGB(dst_2,py_2,1);
 313     PUTRGB(dst_1,py_1,1);
 314
 315     LOADCHROMA(2);
 316     PUTRGB(dst_1,py_1,2);
 317     PUTRGB(dst_2,py_2,2);
 318
 319     LOADCHROMA(3);
 320     PUTRGB(dst_2,py_2,3);
 321     PUTRGB(dst_1,py_1,3);
 322 CLOSEYUV2RGBFUNC(8)
 323
 324 // This is exactly the same code as yuv2rgb_c_32 except for the types of
 325 // r, g, b, dst_1, dst_2
 326 YUV2RGBFUNC(yuv2rgb_c_8, uint8_t, 0)
 327     LOADCHROMA(0);
 328     PUTRGB(dst_1,py_1,0);
 329     PUTRGB(dst_2,py_2,0);
 330
 331     LOADCHROMA(1);
 332     PUTRGB(dst_2,py_2,1);
 333     PUTRGB(dst_1,py_1,1);
 334
 335     LOADCHROMA(2);
 336     PUTRGB(dst_1,py_1,2);
 337     PUTRGB(dst_2,py_2,2);
 338
 339     LOADCHROMA(3);
 340     PUTRGB(dst_2,py_2,3);
 341     PUTRGB(dst_1,py_1,3);
 342 CLOSEYUV2RGBFUNC(8)
 343
 344 // r, g, b, dst_1, dst_2
 345 YUV2RGBFUNC(yuv2rgb_c_8_ordered_dither, uint8_t, 0)
 346     const uint8_t *d32 = dither_8x8_32[y&7];
 347     const uint8_t *d64 = dither_8x8_73[y&7];
 348 #define PUTRGB8(dst,src,i,o)                                    \
 349     Y = src[2*i];                                               \
 350     dst[2*i]   = r[Y+d32[0+o]] + g[Y+d32[0+o]] + b[Y+d64[0+o]]; \
 351     Y = src[2*i+1];                                             \
 352     dst[2*i+1] = r[Y+d32[1+o]] + g[Y+d32[1+o]] + b[Y+d64[1+o]];
 353
 354     LOADCHROMA(0);
 355     PUTRGB8(dst_1,py_1,0,0);
 356     PUTRGB8(dst_2,py_2,0,0+8);
 357
 358     LOADCHROMA(1);
 359     PUTRGB8(dst_2,py_2,1,2+8);
 360     PUTRGB8(dst_1,py_1,1,2);
 361
 362     LOADCHROMA(2);
 363     PUTRGB8(dst_1,py_1,2,4);
 364     PUTRGB8(dst_2,py_2,2,4+8);
 365
 366     LOADCHROMA(3);
 367     PUTRGB8(dst_2,py_2,3,6+8);
 368     PUTRGB8(dst_1,py_1,3,6);
 369 CLOSEYUV2RGBFUNC(8)
 370
 371
 372 // This is exactly the same code as yuv2rgb_c_32 except for the types of
 373 // r, g, b, dst_1, dst_2
 374 YUV2RGBFUNC(yuv2rgb_c_4, uint8_t, 0)
 375     int acc;
 376 #define PUTRGB4(dst,src,i)          \
 377     Y = src[2*i];                   \
 378     acc = r[Y] + g[Y] + b[Y];       \
 379     Y = src[2*i+1];                 \
 380     acc |= (r[Y] + g[Y] + b[Y])<<4; \
 381     dst[i] = acc;
 382
 383     LOADCHROMA(0);
 384     PUTRGB4(dst_1,py_1,0);
 385     PUTRGB4(dst_2,py_2,0);
 386
 387     LOADCHROMA(1);
 388     PUTRGB4(dst_2,py_2,1);
 389     PUTRGB4(dst_1,py_1,1);
 390
 391     LOADCHROMA(2);
 392     PUTRGB4(dst_1,py_1,2);
 393     PUTRGB4(dst_2,py_2,2);
 394
 395     LOADCHROMA(3);
 396     PUTRGB4(dst_2,py_2,3);
 397     PUTRGB4(dst_1,py_1,3);
 398 CLOSEYUV2RGBFUNC(4)
 399
 400 YUV2RGBFUNC(yuv2rgb_c_4_ordered_dither, uint8_t, 0)
 401     const uint8_t *d64 =  dither_8x8_73[y&7];
 402     const uint8_t *d128 = dither_8x8_220[y&7];
 403     int acc;
 404
 405 #define PUTRGB4D(dst,src,i,o)                                     \
 406     Y = src[2*i];                                                 \
 407     acc = r[Y+d128[0+o]] + g[Y+d64[0+o]] + b[Y+d128[0+o]];        \
 408     Y = src[2*i+1];                                               \
 409     acc |= (r[Y+d128[1+o]] + g[Y+d64[1+o]] + b[Y+d128[1+o]])<<4;  \
 410     dst[i]= acc;
 411
 412     LOADCHROMA(0);
 413     PUTRGB4D(dst_1,py_1,0,0);
 414     PUTRGB4D(dst_2,py_2,0,0+8);
 415
 416     LOADCHROMA(1);
 417     PUTRGB4D(dst_2,py_2,1,2+8);
 418     PUTRGB4D(dst_1,py_1,1,2);
 419
 420     LOADCHROMA(2);
 421     PUTRGB4D(dst_1,py_1,2,4);
 422     PUTRGB4D(dst_2,py_2,2,4+8);
 423
 424     LOADCHROMA(3);
 425     PUTRGB4D(dst_2,py_2,3,6+8);
 426     PUTRGB4D(dst_1,py_1,3,6);
 427 CLOSEYUV2RGBFUNC(4)
 428
 429 // This is exactly the same code as yuv2rgb_c_32 except for the types of
 430 // r, g, b, dst_1, dst_2
 431 YUV2RGBFUNC(yuv2rgb_c_4b, uint8_t, 0)
 432     LOADCHROMA(0);
 433     PUTRGB(dst_1,py_1,0);
 434     PUTRGB(dst_2,py_2,0);
 435
 436     LOADCHROMA(1);
 437     PUTRGB(dst_2,py_2,1);
 438     PUTRGB(dst_1,py_1,1);
 439
 440     LOADCHROMA(2);
 441     PUTRGB(dst_1,py_1,2);
 442     PUTRGB(dst_2,py_2,2);
 443
 444     LOADCHROMA(3);
 445     PUTRGB(dst_2,py_2,3);
 446     PUTRGB(dst_1,py_1,3);
 447 CLOSEYUV2RGBFUNC(8)
 448
 449 YUV2RGBFUNC(yuv2rgb_c_4b_ordered_dither, uint8_t, 0)
 450     const uint8_t *d64 =  dither_8x8_73[y&7];
 451     const uint8_t *d128 = dither_8x8_220[y&7];
 452
 453 #define PUTRGB4DB(dst,src,i,o)                                    \
 454     Y = src[2*i];                                                 \
 455     dst[2*i]   = r[Y+d128[0+o]] + g[Y+d64[0+o]] + b[Y+d128[0+o]]; \
 456     Y = src[2*i+1];                                               \
 457     dst[2*i+1] = r[Y+d128[1+o]] + g[Y+d64[1+o]] + b[Y+d128[1+o]];
 458
 459     LOADCHROMA(0);
 460     PUTRGB4DB(dst_1,py_1,0,0);
 461     PUTRGB4DB(dst_2,py_2,0,0+8);
 462
 463     LOADCHROMA(1);
 464     PUTRGB4DB(dst_2,py_2,1,2+8);
 465     PUTRGB4DB(dst_1,py_1,1,2);
 466
 467     LOADCHROMA(2);
 468     PUTRGB4DB(dst_1,py_1,2,4);
 469     PUTRGB4DB(dst_2,py_2,2,4+8);
 470
 471     LOADCHROMA(3);
 472     PUTRGB4DB(dst_2,py_2,3,6+8);
 473     PUTRGB4DB(dst_1,py_1,3,6);
 474 CLOSEYUV2RGBFUNC(8)
 475
 476 YUV2RGBFUNC(yuv2rgb_c_1_ordered_dither, uint8_t, 0)
 477         const uint8_t *d128 = dither_8x8_220[y&7];
 478         char out_1 = 0, out_2 = 0;
 479         g= c->table_gU[128] + c->table_gV[128];
 480
 481 #define PUTRGB1(out,src,i,o)    \
 482     Y = src[2*i];               \
 483     out+= out + g[Y+d128[0+o]]; \
 484     Y = src[2*i+1];             \
 485     out+= out + g[Y+d128[1+o]];
 486
 487     PUTRGB1(out_1,py_1,0,0);
 488     PUTRGB1(out_2,py_2,0,0+8);
 489
 490     PUTRGB1(out_2,py_2,1,2+8);
 491     PUTRGB1(out_1,py_1,1,2);
 492
 493     PUTRGB1(out_1,py_1,2,4);
 494     PUTRGB1(out_2,py_2,2,4+8);
 495
 496     PUTRGB1(out_2,py_2,3,6+8);
 497     PUTRGB1(out_1,py_1,3,6);
 498
 499     dst_1[0]= out_1;
 500     dst_2[0]= out_2;
 501 CLOSEYUV2RGBFUNC(1)
 502
 503 SwsFunc ff_yuv2rgb_get_func_ptr(SwsContext *c)
 504 {
 505     SwsFunc t = NULL;
 506 #if (HAVE_MMX2 || HAVE_MMX) && CONFIG_GPL
 507      t = ff_yuv2rgb_init_mmx(c);
 508 #endif
 509 #if HAVE_VIS
 510     t = ff_yuv2rgb_init_vis(c);
 511 #endif
 512 #if CONFIG_MLIB
 513     t = ff_yuv2rgb_init_mlib(c);
 514 #endif
 515 #if HAVE_ALTIVEC
 516     if (c->flags & SWS_CPU_CAPS_ALTIVEC)
 517         t = ff_yuv2rgb_init_altivec(c);
 518 #endif
 519
 520 #if ARCH_BFIN
 521     if (c->flags & SWS_CPU_CAPS_BFIN)
 522         t = ff_yuv2rgb_get_func_ptr_bfin(c);
 523 #endif
 524
 525     if (t)
 526         return t;
 527
 528     av_log(c, AV_LOG_WARNING, "No accelerated colorspace conversion found.\n");
 529
 530     switch (c->dstFormat) {
 531     case PIX_FMT_RGB48BE:
 532     case PIX_FMT_RGB48LE:    return yuv2rgb_c_48;
 533     case PIX_FMT_ARGB:
 534     case PIX_FMT_ABGR:       if (CONFIG_SWSCALE_ALPHA && c->srcFormat == PIX_FMT_YUVA420P) return yuva2argb_c;
 535     case PIX_FMT_RGBA:
 536     case PIX_FMT_BGRA:       return (CONFIG_SWSCALE_ALPHA && c->srcFormat == PIX_FMT_YUVA420P) ? yuva2rgba_c : yuv2rgb_c_32;
 537     case PIX_FMT_RGB24:      return yuv2rgb_c_24_rgb;
 538     case PIX_FMT_BGR24:      return yuv2rgb_c_24_bgr;
 539     case PIX_FMT_RGB565:
 540     case PIX_FMT_BGR565:
 541     case PIX_FMT_RGB555:
 542     case PIX_FMT_BGR555:     return yuv2rgb_c_16;
 543     case PIX_FMT_RGB8:
 544     case PIX_FMT_BGR8:       return yuv2rgb_c_8_ordered_dither;
 545     case PIX_FMT_RGB4:
 546     case PIX_FMT_BGR4:       return yuv2rgb_c_4_ordered_dither;
 547     case PIX_FMT_RGB4_BYTE:
 548     case PIX_FMT_BGR4_BYTE:  return yuv2rgb_c_4b_ordered_dither;
 549     case PIX_FMT_MONOBLACK:  return yuv2rgb_c_1_ordered_dither;
 550     default:
 551         assert(0);
 552     }
 553     return NULL;
 554 }
 555
 556 static void fill_table(uint8_t* table[256], const int elemsize, const int inc, uint8_t *y_table)
 557 {
 558     int i;
 559     int64_t cb = 0;
 560
 561     y_table -= elemsize * (inc >> 9);
 562
 563     for (i = 0; i < 256; i++) {
 564         table[i] = y_table + elemsize * (cb >> 16);
 565         cb += inc;
 566     }
 567 }
 568
 569 static void fill_gv_table(int table[256], const int elemsize, const int inc)
 570 {
 571     int i;
 572     int64_t cb = 0;
 573     int off = -(inc >> 9);
 574
 575     for (i = 0; i < 256; i++) {
 576         table[i] = elemsize * (off + (cb >> 16));
 577         cb += inc;
 578     }
 579 }
 580
 581 av_cold int ff_yuv2rgb_c_init_tables(SwsContext *c, const int inv_table[4], int fullRange,
 582                                      int brightness, int contrast, int saturation)
 583 {
 584     const int isRgb =      c->dstFormat==PIX_FMT_RGB32
 585                         || c->dstFormat==PIX_FMT_RGB32_1
 586                         || c->dstFormat==PIX_FMT_BGR24
 587                         || c->dstFormat==PIX_FMT_RGB565
 588                         || c->dstFormat==PIX_FMT_RGB555
 589                         || c->dstFormat==PIX_FMT_RGB8
 590                         || c->dstFormat==PIX_FMT_RGB4
 591                         || c->dstFormat==PIX_FMT_RGB4_BYTE
 592                         || c->dstFormat==PIX_FMT_MONOBLACK;
 593     const int bpp = fmt_depth(c->dstFormat);
 594     uint8_t *y_table;
 595     uint16_t *y_table16;
 596     uint32_t *y_table32;
 597     int i, base, rbase, gbase, bbase, abase, needAlpha;
 598     const int yoffs = fullRange ? 384 : 326;
 599
 600     int64_t crv =  inv_table[0];
 601     int64_t cbu =  inv_table[1];
 602     int64_t cgu = -inv_table[2];
 603     int64_t cgv = -inv_table[3];
 604     int64_t cy  = 1<<16;
 605     int64_t oy  = 0;
 606
 607     int64_t yb = 0;
 608
 609     if (!fullRange) {
 610         cy = (cy*255) / 219;
 611         oy = 16<<16;
 612     } else {
 613         crv = (crv*224) / 255;
 614         cbu = (cbu*224) / 255;
 615         cgu = (cgu*224) / 255;
 616         cgv = (cgv*224) / 255;
 617     }
 618
 619     cy  = (cy *contrast             ) >> 16;
 620     crv = (crv*contrast * saturation) >> 32;
 621     cbu = (cbu*contrast * saturation) >> 32;
 622     cgu = (cgu*contrast * saturation) >> 32;
 623     cgv = (cgv*contrast * saturation) >> 32;
 624     oy -= 256*brightness;
 625
 626     //scale coefficients by cy
 627     crv = ((crv << 16) + 0x8000) / cy;
 628     cbu = ((cbu << 16) + 0x8000) / cy;
 629     cgu = ((cgu << 16) + 0x8000) / cy;
 630     cgv = ((cgv << 16) + 0x8000) / cy;
 631
 632     av_free(c->yuvTable);
 633
 634     switch (bpp) {
 635     case 1:
 636         c->yuvTable = av_malloc(1024);
 637         y_table = c->yuvTable;
 638         yb = -(384<<16) - oy;
 639         for (i = 0; i < 1024-110; i++) {
 640             y_table[i+110] = av_clip_uint8((yb + 0x8000) >> 16) >> 7;
 641             yb += cy;
 642         }
 643         fill_table(c->table_gU, 1, cgu, y_table + yoffs);
 644         fill_gv_table(c->table_gV, 1, cgv);
 645         break;
 646     case 4:
 647     case 4|128:
 648         rbase = isRgb ? 3 : 0;
 649         gbase = 1;
 650         bbase = isRgb ? 0 : 3;
 651         c->yuvTable = av_malloc(1024*3);
 652         y_table = c->yuvTable;
 653         yb = -(384<<16) - oy;
 654         for (i = 0; i < 1024-110; i++) {
 655             int yval = av_clip_uint8((yb + 0x8000) >> 16);
 656             y_table[i+110     ] =  (yval >> 7)       << rbase;
 657             y_table[i+ 37+1024] = ((yval + 43) / 85) << gbase;
 658             y_table[i+110+2048] =  (yval >> 7)       << bbase;
 659             yb += cy;
 660         }
 661         fill_table(c->table_rV, 1, crv, y_table + yoffs);
 662         fill_table(c->table_gU, 1, cgu, y_table + yoffs + 1024);
 663         fill_table(c->table_bU, 1, cbu, y_table + yoffs + 2048);
 664         fill_gv_table(c->table_gV, 1, cgv);
 665         break;
 666     case 8:
 667         rbase = isRgb ? 5 : 0;
 668         gbase = isRgb ? 2 : 3;
 669         bbase = isRgb ? 0 : 6;
 670         c->yuvTable = av_malloc(1024*3);
 671         y_table = c->yuvTable;
 672         yb = -(384<<16) - oy;
 673         for (i = 0; i < 1024-38; i++) {
 674             int yval = av_clip_uint8((yb + 0x8000) >> 16);
 675             y_table[i+16     ] = ((yval + 18) / 36) << rbase;
 676             y_table[i+16+1024] = ((yval + 18) / 36) << gbase;
 677             y_table[i+37+2048] = ((yval + 43) / 85) << bbase;
 678             yb += cy;
 679         }
 680         fill_table(c->table_rV, 1, crv, y_table + yoffs);
 681         fill_table(c->table_gU, 1, cgu, y_table + yoffs + 1024);
 682         fill_table(c->table_bU, 1, cbu, y_table + yoffs + 2048);
 683         fill_gv_table(c->table_gV, 1, cgv);
 684         break;
 685     case 15:
 686     case 16:
 687         rbase = isRgb ? bpp - 5 : 0;
 688         gbase = 5;
 689         bbase = isRgb ? 0 : (bpp - 5);
 690         c->yuvTable = av_malloc(1024*3*2);
 691         y_table16 = c->yuvTable;
 692         yb = -(384<<16) - oy;
 693         for (i = 0; i < 1024; i++) {
 694             uint8_t yval = av_clip_uint8((yb + 0x8000) >> 16);
 695             y_table16[i     ] = (yval >> 3)          << rbase;
 696             y_table16[i+1024] = (yval >> (18 - bpp)) << gbase;
 697             y_table16[i+2048] = (yval >> 3)          << bbase;
 698             yb += cy;
 699         }
 700         fill_table(c->table_rV, 2, crv, y_table16 + yoffs);
 701         fill_table(c->table_gU, 2, cgu, y_table16 + yoffs + 1024);
 702         fill_table(c->table_bU, 2, cbu, y_table16 + yoffs + 2048);
 703         fill_gv_table(c->table_gV, 2, cgv);
 704         break;
 705     case 24:
 706     case 48:
 707         c->yuvTable = av_malloc(1024);
 708         y_table = c->yuvTable;
 709         yb = -(384<<16) - oy;
 710         for (i = 0; i < 1024; i++) {
 711             y_table[i] = av_clip_uint8((yb + 0x8000) >> 16);
 712             yb += cy;
 713         }
 714         fill_table(c->table_rV, 1, crv, y_table + yoffs);
 715         fill_table(c->table_gU, 1, cgu, y_table + yoffs);
 716         fill_table(c->table_bU, 1, cbu, y_table + yoffs);
 717         fill_gv_table(c->table_gV, 1, cgv);
 718         break;
 719     case 32:
 720         base = (c->dstFormat == PIX_FMT_RGB32_1 || c->dstFormat == PIX_FMT_BGR32_1) ? 8 : 0;
 721         rbase = base + (isRgb ? 16 : 0);
 722         gbase = base + 8;
 723         bbase = base + (isRgb ? 0 : 16);
 724         needAlpha = CONFIG_SWSCALE_ALPHA && isALPHA(c->srcFormat);
 725         if (!needAlpha)
 726             abase = (base + 24) & 31;
 727         c->yuvTable = av_malloc(1024*3*4);
 728         y_table32 = c->yuvTable;
 729         yb = -(384<<16) - oy;
 730         for (i = 0; i < 1024; i++) {
 731             uint8_t yval = av_clip_uint8((yb + 0x8000) >> 16);
 732             y_table32[i     ] = (yval << rbase) + (needAlpha ? 0 : (255 << abase));
 733             y_table32[i+1024] = yval << gbase;
 734             y_table32[i+2048] = yval << bbase;
 735             yb += cy;
 736         }
 737         fill_table(c->table_rV, 4, crv, y_table32 + yoffs);
 738         fill_table(c->table_gU, 4, cgu, y_table32 + yoffs + 1024);
 739         fill_table(c->table_bU, 4, cbu, y_table32 + yoffs + 2048);
 740         fill_gv_table(c->table_gV, 4, cgv);
 741         break;
 742     default:
 743         c->yuvTable = NULL;
 744         av_log(c, AV_LOG_ERROR, "%ibpp not supported by yuv2rgb\n", bpp);
 745         return -1;
 746     }
 747     return 0;
 748 }