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