git.sesse.net Git - ffmpeg/blob - libswscale/x86/yuv2rgb_template.c

   1 /*
   2  * software YUV to RGB converter
   3  *
   4  * Copyright (C) 2001-2007 Michael Niedermayer
   5  *           (c) 2010 Konstantin Shishkov
   6  *
   7  * This file is part of Libav.
   8  *
   9  * Libav is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU Lesser General Public
  11  * License as published by the Free Software Foundation; either
  12  * version 2.1 of the License, or (at your option) any later version.
  13  *
  14  * Libav is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17  * Lesser General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU Lesser General Public
  20  * License along with Libav; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  22  */
  23
  24 #undef MOVNTQ
  25 #undef EMMS
  26 #undef SFENCE
  27
  28 #if COMPILE_TEMPLATE_MMX2
  29 #define MOVNTQ "movntq"
  30 #define SFENCE "sfence"
  31 #else
  32 #define MOVNTQ "movq"
  33 #define SFENCE " # nop"
  34 #endif
  35
  36 #define REG_BLUE  "0"
  37 #define REG_RED   "1"
  38 #define REG_GREEN "2"
  39 #define REG_ALPHA "3"
  40
  41 #define YUV2RGB_LOOP(depth)                                          \
  42     h_size = (c->dstW + 7) & ~7;                                     \
  43     if (h_size * depth > FFABS(dstStride[0]))                        \
  44         h_size -= 8;                                                 \
  45                                                                      \
  46     if (c->srcFormat == PIX_FMT_YUV422P) {                           \
  47         srcStride[1] *= 2;                                           \
  48         srcStride[2] *= 2;                                           \
  49     }                                                                \
  50                                                                      \
  51     __asm__ volatile ("pxor %mm4, %mm4\n\t");                        \
  52     for (y = 0; y < srcSliceH; y++) {                                \
  53         uint8_t *image    = dst[0] + (y + srcSliceY) * dstStride[0]; \
  54         const uint8_t *py = src[0] +               y * srcStride[0]; \
  55         const uint8_t *pu = src[1] +        (y >> 1) * srcStride[1]; \
  56         const uint8_t *pv = src[2] +        (y >> 1) * srcStride[2]; \
  57         x86_reg index = -h_size / 2;                                 \
  58
  59 #define YUV2RGB_INITIAL_LOAD          \
  60     __asm__ volatile (                \
  61         "movq (%5, %0, 2), %%mm6\n\t" \
  62         "movd    (%2, %0), %%mm0\n\t" \
  63         "movd    (%3, %0), %%mm1\n\t" \
  64         "1: \n\t"                     \
  65
  66 /* YUV2RGB core
  67  * Conversion is performed in usual way:
  68  * R = Y' * Ycoef + Vred * V'
  69  * G = Y' * Ycoef + Vgreen * V' + Ugreen * U'
  70  * B = Y' * Ycoef               + Ublue * U'
  71  *
  72  * where X' = X * 8 - Xoffset (multiplication is performed to increase
  73  * precision a bit).
  74  * Since it operates in YUV420 colorspace, Y component is additionally
  75  * split into Y1 and Y2 for even and odd pixels.
  76  *
  77  * Input:
  78  * mm0 - U (4 elems), mm1 - V (4 elems), mm6 - Y (8 elems), mm4 - zero register
  79  * Output:
  80  * mm1 - R, mm2 - G, mm0 - B
  81  */
  82 #define YUV2RGB                                  \
  83     /* convert Y, U, V into Y1', Y2', U', V' */  \
  84     "movq      %%mm6, %%mm7\n\t"                 \
  85     "punpcklbw %%mm4, %%mm0\n\t"                 \
  86     "punpcklbw %%mm4, %%mm1\n\t"                 \
  87     "pand     "MANGLE(mmx_00ffw)", %%mm6\n\t"    \
  88     "psrlw     $8,    %%mm7\n\t"                 \
  89     "psllw     $3,    %%mm0\n\t"                 \
  90     "psllw     $3,    %%mm1\n\t"                 \
  91     "psllw     $3,    %%mm6\n\t"                 \
  92     "psllw     $3,    %%mm7\n\t"                 \
  93     "psubsw   "U_OFFSET"(%4), %%mm0\n\t"         \
  94     "psubsw   "V_OFFSET"(%4), %%mm1\n\t"         \
  95     "psubw    "Y_OFFSET"(%4), %%mm6\n\t"         \
  96     "psubw    "Y_OFFSET"(%4), %%mm7\n\t"         \
  97 \
  98      /* multiply by coefficients */              \
  99     "movq      %%mm0, %%mm2\n\t"                 \
 100     "movq      %%mm1, %%mm3\n\t"                 \
 101     "pmulhw   "UG_COEFF"(%4), %%mm2\n\t"         \
 102     "pmulhw   "VG_COEFF"(%4), %%mm3\n\t"         \
 103     "pmulhw   "Y_COEFF" (%4), %%mm6\n\t"         \
 104     "pmulhw   "Y_COEFF" (%4), %%mm7\n\t"         \
 105     "pmulhw   "UB_COEFF"(%4), %%mm0\n\t"         \
 106     "pmulhw   "VR_COEFF"(%4), %%mm1\n\t"         \
 107     "paddsw    %%mm3, %%mm2\n\t"                 \
 108     /* now: mm0 = UB, mm1 = VR, mm2 = CG */      \
 109     /*      mm6 = Y1, mm7 = Y2 */                \
 110 \
 111     /* produce RGB */                            \
 112     "movq      %%mm7, %%mm3\n\t"                 \
 113     "movq      %%mm7, %%mm5\n\t"                 \
 114     "paddsw    %%mm0, %%mm3\n\t"                 \
 115     "paddsw    %%mm1, %%mm5\n\t"                 \
 116     "paddsw    %%mm2, %%mm7\n\t"                 \
 117     "paddsw    %%mm6, %%mm0\n\t"                 \
 118     "paddsw    %%mm6, %%mm1\n\t"                 \
 119     "paddsw    %%mm6, %%mm2\n\t"                 \
 120
 121 #define RGB_PACK_INTERLEAVE                  \
 122     /* pack and interleave even/odd pixels */    \
 123     "packuswb  %%mm1, %%mm0\n\t"                 \
 124     "packuswb  %%mm5, %%mm3\n\t"                 \
 125     "packuswb  %%mm2, %%mm2\n\t"                 \
 126     "movq      %%mm0, %%mm1\n\n"                 \
 127     "packuswb  %%mm7, %%mm7\n\t"                 \
 128     "punpcklbw %%mm3, %%mm0\n\t"                 \
 129     "punpckhbw %%mm3, %%mm1\n\t"                 \
 130     "punpcklbw %%mm7, %%mm2\n\t"                 \
 131
 132 #define YUV2RGB_ENDLOOP(depth)                   \
 133     "movq 8 (%5, %0, 2), %%mm6\n\t"              \
 134     "movd 4 (%3, %0),    %%mm1\n\t"              \
 135     "movd 4 (%2, %0),    %%mm0\n\t"              \
 136     "add $"AV_STRINGIFY(depth * 8)", %1\n\t"     \
 137     "add  $4, %0\n\t"                            \
 138     "js   1b\n\t"                                \
 139
 140 #define YUV2RGB_OPERANDS                                          \
 141         : "+r" (index), "+r" (image)                              \
 142         : "r" (pu - index), "r" (pv - index), "r"(&c->redDither), \
 143           "r" (py - 2*index)                                      \
 144         );                                                        \
 145     }                                                             \
 146
 147 #define YUV2RGB_OPERANDS_ALPHA                                    \
 148         : "+r" (index), "+r" (image)                              \
 149         : "r" (pu - index), "r" (pv - index), "r"(&c->redDither), \
 150           "r" (py - 2*index), "r" (pa - 2*index)                  \
 151         );                                                        \
 152     }                                                             \
 153
 154 #define YUV2RGB_ENDFUNC                          \
 155     __asm__ volatile (SFENCE"\n\t"               \
 156                     "emms    \n\t");             \
 157     return srcSliceH;                            \
 158
 159 #define IF0(x)
 160 #define IF1(x) x
 161
 162 #define RGB_PACK16(gmask, is15)                  \
 163     "pand      "MANGLE(mmx_redmask)", %%mm0\n\t" \
 164     "pand      "MANGLE(mmx_redmask)", %%mm1\n\t" \
 165     "movq      %%mm2,     %%mm3\n\t"             \
 166     "psllw   $"AV_STRINGIFY(3-is15)", %%mm2\n\t" \
 167     "psrlw   $"AV_STRINGIFY(5+is15)", %%mm3\n\t" \
 168     "psrlw     $3,        %%mm0\n\t"             \
 169     IF##is15("psrlw  $1,  %%mm1\n\t")            \
 170     "pand "MANGLE(pb_e0)", %%mm2\n\t"            \
 171     "pand "MANGLE(gmask)", %%mm3\n\t"            \
 172     "por       %%mm2,     %%mm0\n\t"             \
 173     "por       %%mm3,     %%mm1\n\t"             \
 174     "movq      %%mm0,     %%mm2\n\t"             \
 175     "punpcklbw %%mm1,     %%mm0\n\t"             \
 176     "punpckhbw %%mm1,     %%mm2\n\t"             \
 177     MOVNTQ "   %%mm0,      (%1)\n\t"             \
 178     MOVNTQ "   %%mm2,     8(%1)\n\t"             \
 179
 180 #define DITHER_RGB                               \
 181     "paddusb "BLUE_DITHER"(%4),  %%mm0\n\t"      \
 182     "paddusb "GREEN_DITHER"(%4), %%mm2\n\t"      \
 183     "paddusb "RED_DITHER"(%4),   %%mm1\n\t"      \
 184
 185 #if !COMPILE_TEMPLATE_MMX2
 186 static inline int RENAME(yuv420_rgb15)(SwsContext *c, const uint8_t *src[],
 187                                        int srcStride[],
 188                                        int srcSliceY, int srcSliceH,
 189                                        uint8_t *dst[], int dstStride[])
 190 {
 191     int y, h_size;
 192
 193     YUV2RGB_LOOP(2)
 194
 195 #ifdef DITHER1XBPP
 196         c->blueDither  = ff_dither8[y       & 1];
 197         c->greenDither = ff_dither8[y       & 1];
 198         c->redDither   = ff_dither8[(y + 1) & 1];
 199 #endif
 200
 201         YUV2RGB_INITIAL_LOAD
 202         YUV2RGB
 203         RGB_PACK_INTERLEAVE
 204 #ifdef DITHER1XBPP
 205         DITHER_RGB
 206 #endif
 207         RGB_PACK16(pb_03, 1)
 208
 209     YUV2RGB_ENDLOOP(2)
 210     YUV2RGB_OPERANDS
 211     YUV2RGB_ENDFUNC
 212 }
 213
 214 static inline int RENAME(yuv420_rgb16)(SwsContext *c, const uint8_t *src[],
 215                                        int srcStride[],
 216                                        int srcSliceY, int srcSliceH,
 217                                        uint8_t *dst[], int dstStride[])
 218 {
 219     int y, h_size;
 220
 221     YUV2RGB_LOOP(2)
 222
 223 #ifdef DITHER1XBPP
 224         c->blueDither  = ff_dither8[y       & 1];
 225         c->greenDither = ff_dither4[y       & 1];
 226         c->redDither   = ff_dither8[(y + 1) & 1];
 227 #endif
 228
 229         YUV2RGB_INITIAL_LOAD
 230         YUV2RGB
 231         RGB_PACK_INTERLEAVE
 232 #ifdef DITHER1XBPP
 233         DITHER_RGB
 234 #endif
 235         RGB_PACK16(pb_07, 0)
 236
 237     YUV2RGB_ENDLOOP(2)
 238     YUV2RGB_OPERANDS
 239     YUV2RGB_ENDFUNC
 240 }
 241 #endif /* !COMPILE_TEMPLATE_MMX2 */
 242
 243 #define RGB_PACK24(blue, red)\
 244     "packuswb  %%mm3,      %%mm0 \n" /* R0 R2 R4 R6 R1 R3 R5 R7 */\
 245     "packuswb  %%mm5,      %%mm1 \n" /* B0 B2 B4 B6 B1 B3 B5 B7 */\
 246     "packuswb  %%mm7,      %%mm2 \n" /* G0 G2 G4 G6 G1 G3 G5 G7 */\
 247     "movq      %%mm"red",  %%mm3 \n"\
 248     "movq      %%mm"blue", %%mm6 \n"\
 249     "psrlq     $32,        %%mm"red" \n" /* R1 R3 R5 R7 */\
 250     "punpcklbw %%mm2,      %%mm3 \n" /* R0 G0 R2 G2 R4 G4 R6 G6 */\
 251     "punpcklbw %%mm"red",  %%mm6 \n" /* B0 R1 B2 R3 B4 R5 B6 R7 */\
 252     "movq      %%mm3,      %%mm5 \n"\
 253     "punpckhbw %%mm"blue", %%mm2 \n" /* G1 B1 G3 B3 G5 B5 G7 B7 */\
 254     "punpcklwd %%mm6,      %%mm3 \n" /* R0 G0 B0 R1 R2 G2 B2 R3 */\
 255     "punpckhwd %%mm6,      %%mm5 \n" /* R4 G4 B4 R5 R6 G6 B6 R7 */\
 256     RGB_PACK24_B
 257
 258 #if COMPILE_TEMPLATE_MMX2
 259 DECLARE_ASM_CONST(8, int16_t, mask1101[4]) = {-1,-1, 0,-1};
 260 DECLARE_ASM_CONST(8, int16_t, mask0010[4]) = { 0, 0,-1, 0};
 261 DECLARE_ASM_CONST(8, int16_t, mask0110[4]) = { 0,-1,-1, 0};
 262 DECLARE_ASM_CONST(8, int16_t, mask1001[4]) = {-1, 0, 0,-1};
 263 DECLARE_ASM_CONST(8, int16_t, mask0100[4]) = { 0,-1, 0, 0};
 264 #undef RGB_PACK24_B
 265 #define RGB_PACK24_B\
 266     "pshufw    $0xc6,  %%mm2, %%mm1 \n"\
 267     "pshufw    $0x84,  %%mm3, %%mm6 \n"\
 268     "pshufw    $0x38,  %%mm5, %%mm7 \n"\
 269     "pand "MANGLE(mask1101)", %%mm6 \n" /* R0 G0 B0 R1 -- -- R2 G2 */\
 270     "movq      %%mm1,         %%mm0 \n"\
 271     "pand "MANGLE(mask0110)", %%mm7 \n" /* -- -- R6 G6 B6 R7 -- -- */\
 272     "movq      %%mm1,         %%mm2 \n"\
 273     "pand "MANGLE(mask0100)", %%mm1 \n" /* -- -- G3 B3 -- -- -- -- */\
 274     "psrlq       $48,         %%mm3 \n" /* B2 R3 -- -- -- -- -- -- */\
 275     "pand "MANGLE(mask0010)", %%mm0 \n" /* -- -- -- -- G1 B1 -- -- */\
 276     "psllq       $32,         %%mm5 \n" /* -- -- -- -- R4 G4 B4 R5 */\
 277     "pand "MANGLE(mask1001)", %%mm2 \n" /* G5 B5 -- -- -- -- G7 B7 */\
 278     "por       %%mm3,         %%mm1 \n"\
 279     "por       %%mm6,         %%mm0 \n"\
 280     "por       %%mm5,         %%mm1 \n"\
 281     "por       %%mm7,         %%mm2 \n"\
 282     MOVNTQ"    %%mm0,          (%1) \n"\
 283     MOVNTQ"    %%mm1,         8(%1) \n"\
 284     MOVNTQ"    %%mm2,        16(%1) \n"\
 285
 286 #else
 287 #undef RGB_PACK24_B
 288 #define RGB_PACK24_B\
 289     "movd      %%mm3,       (%1) \n" /* R0 G0 B0 R1 */\
 290     "movd      %%mm2,      4(%1) \n" /* G1 B1 */\
 291     "psrlq     $32,        %%mm3 \n"\
 292     "psrlq     $16,        %%mm2 \n"\
 293     "movd      %%mm3,      6(%1) \n" /* R2 G2 B2 R3 */\
 294     "movd      %%mm2,     10(%1) \n" /* G3 B3 */\
 295     "psrlq     $16,        %%mm2 \n"\
 296     "movd      %%mm5,     12(%1) \n" /* R4 G4 B4 R5 */\
 297     "movd      %%mm2,     16(%1) \n" /* G5 B5 */\
 298     "psrlq     $32,        %%mm5 \n"\
 299     "movd      %%mm2,     20(%1) \n" /* -- -- G7 B7 */\
 300     "movd      %%mm5,     18(%1) \n" /* R6 G6 B6 R7 */\
 301
 302 #endif
 303
 304 static inline int RENAME(yuv420_rgb24)(SwsContext *c, const uint8_t *src[],
 305                                        int srcStride[],
 306                                        int srcSliceY, int srcSliceH,
 307                                        uint8_t *dst[], int dstStride[])
 308 {
 309     int y, h_size;
 310
 311     YUV2RGB_LOOP(3)
 312
 313         YUV2RGB_INITIAL_LOAD
 314         YUV2RGB
 315         RGB_PACK24(REG_BLUE, REG_RED)
 316
 317     YUV2RGB_ENDLOOP(3)
 318     YUV2RGB_OPERANDS
 319     YUV2RGB_ENDFUNC
 320 }
 321
 322 static inline int RENAME(yuv420_bgr24)(SwsContext *c, const uint8_t *src[],
 323                                        int srcStride[],
 324                                        int srcSliceY, int srcSliceH,
 325                                        uint8_t *dst[], int dstStride[])
 326 {
 327     int y, h_size;
 328
 329     YUV2RGB_LOOP(3)
 330
 331         YUV2RGB_INITIAL_LOAD
 332         YUV2RGB
 333         RGB_PACK24(REG_RED, REG_BLUE)
 334
 335     YUV2RGB_ENDLOOP(3)
 336     YUV2RGB_OPERANDS
 337     YUV2RGB_ENDFUNC
 338 }
 339
 340
 341 #define SET_EMPTY_ALPHA                                                      \
 342     "pcmpeqd   %%mm"REG_ALPHA", %%mm"REG_ALPHA"\n\t" /* set alpha to 0xFF */ \
 343
 344 #define LOAD_ALPHA                                   \
 345     "movq      (%6, %0, 2),     %%mm"REG_ALPHA"\n\t" \
 346
 347 #define RGB_PACK32(red, green, blue, alpha)  \
 348     "movq      %%mm"blue",  %%mm5\n\t"       \
 349     "movq      %%mm"red",   %%mm6\n\t"       \
 350     "punpckhbw %%mm"green", %%mm5\n\t"       \
 351     "punpcklbw %%mm"green", %%mm"blue"\n\t"  \
 352     "punpckhbw %%mm"alpha", %%mm6\n\t"       \
 353     "punpcklbw %%mm"alpha", %%mm"red"\n\t"   \
 354     "movq      %%mm"blue",  %%mm"green"\n\t" \
 355     "movq      %%mm5,       %%mm"alpha"\n\t" \
 356     "punpcklwd %%mm"red",   %%mm"blue"\n\t"  \
 357     "punpckhwd %%mm"red",   %%mm"green"\n\t" \
 358     "punpcklwd %%mm6,       %%mm5\n\t"       \
 359     "punpckhwd %%mm6,       %%mm"alpha"\n\t" \
 360     MOVNTQ "   %%mm"blue",   0(%1)\n\t"      \
 361     MOVNTQ "   %%mm"green",  8(%1)\n\t"      \
 362     MOVNTQ "   %%mm5,       16(%1)\n\t"      \
 363     MOVNTQ "   %%mm"alpha", 24(%1)\n\t"      \
 364
 365 #if !COMPILE_TEMPLATE_MMX2
 366 static inline int RENAME(yuv420_rgb32)(SwsContext *c, const uint8_t *src[],
 367                                        int srcStride[],
 368                                        int srcSliceY, int srcSliceH,
 369                                        uint8_t *dst[], int dstStride[])
 370 {
 371     int y, h_size;
 372
 373     YUV2RGB_LOOP(4)
 374
 375         YUV2RGB_INITIAL_LOAD
 376         YUV2RGB
 377         RGB_PACK_INTERLEAVE
 378         SET_EMPTY_ALPHA
 379         RGB_PACK32(REG_RED, REG_GREEN, REG_BLUE, REG_ALPHA)
 380
 381     YUV2RGB_ENDLOOP(4)
 382     YUV2RGB_OPERANDS
 383     YUV2RGB_ENDFUNC
 384 }
 385
 386 #if HAVE_7REGS && CONFIG_SWSCALE_ALPHA
 387 static inline int RENAME(yuva420_rgb32)(SwsContext *c, const uint8_t *src[],
 388                                         int srcStride[],
 389                                         int srcSliceY, int srcSliceH,
 390                                         uint8_t *dst[], int dstStride[])
 391 {
 392     int y, h_size;
 393
 394     YUV2RGB_LOOP(4)
 395
 396         const uint8_t *pa = src[3] + y * srcStride[3];
 397         YUV2RGB_INITIAL_LOAD
 398         YUV2RGB
 399         RGB_PACK_INTERLEAVE
 400         LOAD_ALPHA
 401         RGB_PACK32(REG_RED, REG_GREEN, REG_BLUE, REG_ALPHA)
 402
 403     YUV2RGB_ENDLOOP(4)
 404     YUV2RGB_OPERANDS_ALPHA
 405     YUV2RGB_ENDFUNC
 406 }
 407 #endif
 408
 409 static inline int RENAME(yuv420_bgr32)(SwsContext *c, const uint8_t *src[],
 410                                        int srcStride[],
 411                                        int srcSliceY, int srcSliceH,
 412                                        uint8_t *dst[], int dstStride[])
 413 {
 414     int y, h_size;
 415
 416     YUV2RGB_LOOP(4)
 417
 418         YUV2RGB_INITIAL_LOAD
 419         YUV2RGB
 420         RGB_PACK_INTERLEAVE
 421         SET_EMPTY_ALPHA
 422         RGB_PACK32(REG_BLUE, REG_GREEN, REG_RED, REG_ALPHA)
 423
 424     YUV2RGB_ENDLOOP(4)
 425     YUV2RGB_OPERANDS
 426     YUV2RGB_ENDFUNC
 427 }
 428
 429 #if HAVE_7REGS && CONFIG_SWSCALE_ALPHA
 430 static inline int RENAME(yuva420_bgr32)(SwsContext *c, const uint8_t *src[],
 431                                         int srcStride[],
 432                                         int srcSliceY, int srcSliceH,
 433                                         uint8_t *dst[], int dstStride[])
 434 {
 435     int y, h_size;
 436
 437     YUV2RGB_LOOP(4)
 438
 439         const uint8_t *pa = src[3] + y * srcStride[3];
 440         YUV2RGB_INITIAL_LOAD
 441         YUV2RGB
 442         RGB_PACK_INTERLEAVE
 443         LOAD_ALPHA
 444         RGB_PACK32(REG_BLUE, REG_GREEN, REG_RED, REG_ALPHA)
 445
 446     YUV2RGB_ENDLOOP(4)
 447     YUV2RGB_OPERANDS_ALPHA
 448     YUV2RGB_ENDFUNC
 449 }
 450 #endif
 451
 452 #endif /* !COMPILE_TEMPLATE_MMX2 */