FFmpeg: libswscale/yuv2rgb.c Source File

00001 /*
00002  * software YUV to RGB converter
00003  *
00004  * Copyright (C) 2009 Konstantin Shishkov
00005  *
00006  * MMX/MMX2 template stuff (needed for fast movntq support),
00007  * 1,4,8bpp support and context / deglobalize stuff
00008  * by Michael Niedermayer (michaelni@gmx.at)
00009  *
00010  * This file is part of FFmpeg.
00011  *
00012  * FFmpeg is free software; you can redistribute it and/or
00013  * modify it under the terms of the GNU Lesser General Public
00014  * License as published by the Free Software Foundation; either
00015  * version 2.1 of the License, or (at your option) any later version.
00016  *
00017  * FFmpeg is distributed in the hope that it will be useful,
00018  * but WITHOUT ANY WARRANTY; without even the implied warranty of
00019  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00020  * Lesser General Public License for more details.
00021  *
00022  * You should have received a copy of the GNU Lesser General Public
00023  * License along with FFmpeg; if not, write to the Free Software
00024  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
00025  */
00026 
00027 #include <stdio.h>
00028 #include <stdlib.h>
00029 #include <inttypes.h>
00030 #include <assert.h>
00031 
00032 #include "config.h"
00033 #include "rgb2rgb.h"
00034 #include "swscale.h"
00035 #include "swscale_internal.h"
00036 
00037 #define DITHER1XBPP // only for MMX
00038 
00039 extern const uint8_t dither_8x8_32[8][8];
00040 extern const uint8_t dither_8x8_73[8][8];
00041 extern const uint8_t dither_8x8_220[8][8];
00042 
00043 #if HAVE_MMX && CONFIG_GPL
00044 
00045 /* hope these constant values are cache line aligned */
00046 DECLARE_ASM_CONST(8, uint64_t, mmx_00ffw)   = 0x00ff00ff00ff00ffULL;
00047 DECLARE_ASM_CONST(8, uint64_t, mmx_redmask) = 0xf8f8f8f8f8f8f8f8ULL;
00048 DECLARE_ASM_CONST(8, uint64_t, mmx_grnmask) = 0xfcfcfcfcfcfcfcfcULL;
00049 
00050 //MMX versions
00051 #undef RENAME
00052 #undef HAVE_MMX2
00053 #undef HAVE_AMD3DNOW
00054 #define HAVE_MMX2 0
00055 #define HAVE_AMD3DNOW 0
00056 #define RENAME(a) a ## _MMX
00057 #include "yuv2rgb_template.c"
00058 
00059 //MMX2 versions
00060 #undef RENAME
00061 #undef HAVE_MMX2
00062 #define HAVE_MMX2 1
00063 #define RENAME(a) a ## _MMX2
00064 #include "yuv2rgb_template.c"
00065 
00066 #endif /* HAVE_MMX && CONFIG_GPL */
00067 
00068 const int32_t ff_yuv2rgb_coeffs[8][4] = {
00069     {117504, 138453, 13954, 34903}, /* no sequence_display_extension */
00070     {117504, 138453, 13954, 34903}, /* ITU-R Rec. 709 (1990) */
00071     {104597, 132201, 25675, 53279}, /* unspecified */
00072     {104597, 132201, 25675, 53279}, /* reserved */
00073     {104448, 132798, 24759, 53109}, /* FCC */
00074     {104597, 132201, 25675, 53279}, /* ITU-R Rec. 624-4 System B, G */
00075     {104597, 132201, 25675, 53279}, /* SMPTE 170M */
00076     {117579, 136230, 16907, 35559}  /* SMPTE 240M (1987) */
00077 };
00078 
00079 #define LOADCHROMA(i)                               \
00080     U = pu[i];                                      \
00081     V = pv[i];                                      \
00082     r = (void *)c->table_rV[V];                     \
00083     g = (void *)(c->table_gU[U] + c->table_gV[V]);  \
00084     b = (void *)c->table_bU[U];
00085 
00086 #define PUTRGB(dst,src,i,o)          \
00087     Y = src[2*i+o];                  \
00088     dst[2*i  ] = r[Y] + g[Y] + b[Y]; \
00089     Y = src[2*i+1-o];                \
00090     dst[2*i+1] = r[Y] + g[Y] + b[Y];
00091 
00092 #define PUTRGB24(dst,src,i)                                  \
00093     Y = src[2*i];                                            \
00094     dst[6*i+0] = r[Y]; dst[6*i+1] = g[Y]; dst[6*i+2] = b[Y]; \
00095     Y = src[2*i+1];                                          \
00096     dst[6*i+3] = r[Y]; dst[6*i+4] = g[Y]; dst[6*i+5] = b[Y];
00097 
00098 #define PUTBGR24(dst,src,i)                                  \
00099     Y = src[2*i];                                            \
00100     dst[6*i+0] = b[Y]; dst[6*i+1] = g[Y]; dst[6*i+2] = r[Y]; \
00101     Y = src[2*i+1];                                          \
00102     dst[6*i+3] = b[Y]; dst[6*i+4] = g[Y]; dst[6*i+5] = r[Y];
00103 
00104 #define YUV2RGBFUNC(func_name, dst_type) \
00105 static int func_name(SwsContext *c, uint8_t* src[], int srcStride[], int srcSliceY, \
00106                      int srcSliceH, uint8_t* dst[], int dstStride[]){\
00107     int y;\
00108 \
00109     if (c->srcFormat == PIX_FMT_YUV422P) {\
00110         srcStride[1] *= 2;\
00111         srcStride[2] *= 2;\
00112     }\
00113     for (y=0; y<srcSliceH; y+=2) {\
00114         dst_type *dst_1 = (dst_type*)(dst[0] + (y+srcSliceY  )*dstStride[0]);\
00115         dst_type *dst_2 = (dst_type*)(dst[0] + (y+srcSliceY+1)*dstStride[0]);\
00116         dst_type av_unused *r, *b;\
00117         dst_type *g;\
00118         uint8_t *py_1 = src[0] + y*srcStride[0];\
00119         uint8_t *py_2 = py_1 + srcStride[0];\
00120         uint8_t *pu = src[1] + (y>>1)*srcStride[1];\
00121         uint8_t *pv = src[2] + (y>>1)*srcStride[2];\
00122         unsigned int h_size = c->dstW>>3;\
00123         while (h_size--) {\
00124             int av_unused U, V;\
00125             int Y;\
00126 
00127 #define ENDYUV2RGBLINE(dst_delta)\
00128             pu += 4;\
00129             pv += 4;\
00130             py_1 += 8;\
00131             py_2 += 8;\
00132             dst_1 += dst_delta;\
00133             dst_2 += dst_delta;\
00134         }\
00135         if (c->dstW & 4) {\
00136             int av_unused Y, U, V;\
00137 
00138 #define ENDYUV2RGBFUNC()\
00139         }\
00140     }\
00141     return srcSliceH;\
00142 }
00143 
00144 #define CLOSEYUV2RGBFUNC(dst_delta)\
00145     ENDYUV2RGBLINE(dst_delta)\
00146     ENDYUV2RGBFUNC()
00147 
00148 YUV2RGBFUNC(yuv2rgb_c_32, uint32_t)
00149     LOADCHROMA(0);
00150     PUTRGB(dst_1,py_1,0,0);
00151     PUTRGB(dst_2,py_2,0,1);
00152 
00153     LOADCHROMA(1);
00154     PUTRGB(dst_2,py_2,1,1);
00155     PUTRGB(dst_1,py_1,1,0);
00156     LOADCHROMA(1);
00157     PUTRGB(dst_2,py_2,1,1);
00158     PUTRGB(dst_1,py_1,1,0);
00159 
00160     LOADCHROMA(2);
00161     PUTRGB(dst_1,py_1,2,0);
00162     PUTRGB(dst_2,py_2,2,1);
00163 
00164     LOADCHROMA(3);
00165     PUTRGB(dst_2,py_2,3,1);
00166     PUTRGB(dst_1,py_1,3,0);
00167 ENDYUV2RGBLINE(8)
00168     LOADCHROMA(0);
00169     PUTRGB(dst_1,py_1,0,0);
00170     PUTRGB(dst_2,py_2,0,1);
00171 
00172     LOADCHROMA(1);
00173     PUTRGB(dst_2,py_2,1,1);
00174     PUTRGB(dst_1,py_1,1,0);
00175 ENDYUV2RGBFUNC()
00176 
00177 YUV2RGBFUNC(yuv2rgb_c_24_rgb, uint8_t)
00178     LOADCHROMA(0);
00179     PUTRGB24(dst_1,py_1,0);
00180     PUTRGB24(dst_2,py_2,0);
00181 
00182     LOADCHROMA(1);
00183     PUTRGB24(dst_2,py_2,1);
00184     PUTRGB24(dst_1,py_1,1);
00185 
00186     LOADCHROMA(2);
00187     PUTRGB24(dst_1,py_1,2);
00188     PUTRGB24(dst_2,py_2,2);
00189 
00190     LOADCHROMA(3);
00191     PUTRGB24(dst_2,py_2,3);
00192     PUTRGB24(dst_1,py_1,3);
00193 ENDYUV2RGBLINE(24)
00194     LOADCHROMA(0);
00195     PUTRGB24(dst_1,py_1,0);
00196     PUTRGB24(dst_2,py_2,0);
00197 
00198     LOADCHROMA(1);
00199     PUTRGB24(dst_2,py_2,1);
00200     PUTRGB24(dst_1,py_1,1);
00201 ENDYUV2RGBFUNC()
00202 
00203 // only trivial mods from yuv2rgb_c_24_rgb
00204 YUV2RGBFUNC(yuv2rgb_c_24_bgr, uint8_t)
00205     LOADCHROMA(0);
00206     PUTBGR24(dst_1,py_1,0);
00207     PUTBGR24(dst_2,py_2,0);
00208 
00209     LOADCHROMA(1);
00210     PUTBGR24(dst_2,py_2,1);
00211     PUTBGR24(dst_1,py_1,1);
00212 
00213     LOADCHROMA(2);
00214     PUTBGR24(dst_1,py_1,2);
00215     PUTBGR24(dst_2,py_2,2);
00216 
00217     LOADCHROMA(3);
00218     PUTBGR24(dst_2,py_2,3);
00219     PUTBGR24(dst_1,py_1,3);
00220 ENDYUV2RGBLINE(24)
00221     LOADCHROMA(0);
00222     PUTBGR24(dst_1,py_1,0);
00223     PUTBGR24(dst_2,py_2,0);
00224 
00225     LOADCHROMA(1);
00226     PUTBGR24(dst_2,py_2,1);
00227     PUTBGR24(dst_1,py_1,1);
00228 ENDYUV2RGBFUNC()
00229 
00230 // This is exactly the same code as yuv2rgb_c_32 except for the types of
00231 // r, g, b, dst_1, dst_2
00232 YUV2RGBFUNC(yuv2rgb_c_16, uint16_t)
00233     LOADCHROMA(0);
00234     PUTRGB(dst_1,py_1,0,0);
00235     PUTRGB(dst_2,py_2,0,1);
00236 
00237     LOADCHROMA(1);
00238     PUTRGB(dst_2,py_2,1,1);
00239     PUTRGB(dst_1,py_1,1,0);
00240 
00241     LOADCHROMA(2);
00242     PUTRGB(dst_1,py_1,2,0);
00243     PUTRGB(dst_2,py_2,2,1);
00244 
00245     LOADCHROMA(3);
00246     PUTRGB(dst_2,py_2,3,1);
00247     PUTRGB(dst_1,py_1,3,0);
00248 CLOSEYUV2RGBFUNC(8)
00249 
00250 // This is exactly the same code as yuv2rgb_c_32 except for the types of
00251 // r, g, b, dst_1, dst_2
00252 YUV2RGBFUNC(yuv2rgb_c_8, uint8_t)
00253     LOADCHROMA(0);
00254     PUTRGB(dst_1,py_1,0,0);
00255     PUTRGB(dst_2,py_2,0,1);
00256 
00257     LOADCHROMA(1);
00258     PUTRGB(dst_2,py_2,1,1);
00259     PUTRGB(dst_1,py_1,1,0);
00260 
00261     LOADCHROMA(2);
00262     PUTRGB(dst_1,py_1,2,0);
00263     PUTRGB(dst_2,py_2,2,1);
00264 
00265     LOADCHROMA(3);
00266     PUTRGB(dst_2,py_2,3,1);
00267     PUTRGB(dst_1,py_1,3,0);
00268 CLOSEYUV2RGBFUNC(8)
00269 
00270 // r, g, b, dst_1, dst_2
00271 YUV2RGBFUNC(yuv2rgb_c_8_ordered_dither, uint8_t)
00272     const uint8_t *d32 = dither_8x8_32[y&7];
00273     const uint8_t *d64 = dither_8x8_73[y&7];
00274 #define PUTRGB8(dst,src,i,o)                                    \
00275     Y = src[2*i];                                               \
00276     dst[2*i]   = r[Y+d32[0+o]] + g[Y+d32[0+o]] + b[Y+d64[0+o]]; \
00277     Y = src[2*i+1];                                             \
00278     dst[2*i+1] = r[Y+d32[1+o]] + g[Y+d32[1+o]] + b[Y+d64[1+o]];
00279 
00280     LOADCHROMA(0);
00281     PUTRGB8(dst_1,py_1,0,0);
00282     PUTRGB8(dst_2,py_2,0,0+8);
00283 
00284     LOADCHROMA(1);
00285     PUTRGB8(dst_2,py_2,1,2+8);
00286     PUTRGB8(dst_1,py_1,1,2);
00287 
00288     LOADCHROMA(2);
00289     PUTRGB8(dst_1,py_1,2,4);
00290     PUTRGB8(dst_2,py_2,2,4+8);
00291 
00292     LOADCHROMA(3);
00293     PUTRGB8(dst_2,py_2,3,6+8);
00294     PUTRGB8(dst_1,py_1,3,6);
00295 CLOSEYUV2RGBFUNC(8)
00296 
00297 
00298 // This is exactly the same code as yuv2rgb_c_32 except for the types of
00299 // r, g, b, dst_1, dst_2
00300 YUV2RGBFUNC(yuv2rgb_c_4, uint8_t)
00301     int acc;
00302 #define PUTRGB4(dst,src,i)          \
00303     Y = src[2*i];                   \
00304     acc = r[Y] + g[Y] + b[Y];       \
00305     Y = src[2*i+1];                 \
00306     acc |= (r[Y] + g[Y] + b[Y])<<4; \
00307     dst[i] = acc;
00308 
00309     LOADCHROMA(0);
00310     PUTRGB4(dst_1,py_1,0);
00311     PUTRGB4(dst_2,py_2,0);
00312 
00313     LOADCHROMA(1);
00314     PUTRGB4(dst_2,py_2,1);
00315     PUTRGB4(dst_1,py_1,1);
00316 
00317     LOADCHROMA(2);
00318     PUTRGB4(dst_1,py_1,2);
00319     PUTRGB4(dst_2,py_2,2);
00320 
00321     LOADCHROMA(3);
00322     PUTRGB4(dst_2,py_2,3);
00323     PUTRGB4(dst_1,py_1,3);
00324 CLOSEYUV2RGBFUNC(4)
00325 
00326 YUV2RGBFUNC(yuv2rgb_c_4_ordered_dither, uint8_t)
00327     const uint8_t *d64 =  dither_8x8_73[y&7];
00328     const uint8_t *d128 = dither_8x8_220[y&7];
00329     int acc;
00330 
00331 #define PUTRGB4D(dst,src,i,o)                                     \
00332     Y = src[2*i];                                                 \
00333     acc = r[Y+d128[0+o]] + g[Y+d64[0+o]] + b[Y+d128[0+o]];        \
00334     Y = src[2*i+1];                                               \
00335     acc |= (r[Y+d128[1+o]] + g[Y+d64[1+o]] + b[Y+d128[1+o]])<<4;  \
00336     dst[i]= acc;
00337 
00338     LOADCHROMA(0);
00339     PUTRGB4D(dst_1,py_1,0,0);
00340     PUTRGB4D(dst_2,py_2,0,0+8);
00341 
00342     LOADCHROMA(1);
00343     PUTRGB4D(dst_2,py_2,1,2+8);
00344     PUTRGB4D(dst_1,py_1,1,2);
00345 
00346     LOADCHROMA(2);
00347     PUTRGB4D(dst_1,py_1,2,4);
00348     PUTRGB4D(dst_2,py_2,2,4+8);
00349 
00350     LOADCHROMA(3);
00351     PUTRGB4D(dst_2,py_2,3,6+8);
00352     PUTRGB4D(dst_1,py_1,3,6);
00353 CLOSEYUV2RGBFUNC(4)
00354 
00355 // This is exactly the same code as yuv2rgb_c_32 except for the types of
00356 // r, g, b, dst_1, dst_2
00357 YUV2RGBFUNC(yuv2rgb_c_4b, uint8_t)
00358     LOADCHROMA(0);
00359     PUTRGB(dst_1,py_1,0,0);
00360     PUTRGB(dst_2,py_2,0,1);
00361 
00362     LOADCHROMA(1);
00363     PUTRGB(dst_2,py_2,1,1);
00364     PUTRGB(dst_1,py_1,1,0);
00365 
00366     LOADCHROMA(2);
00367     PUTRGB(dst_1,py_1,2,0);
00368     PUTRGB(dst_2,py_2,2,1);
00369 
00370     LOADCHROMA(3);
00371     PUTRGB(dst_2,py_2,3,1);
00372     PUTRGB(dst_1,py_1,3,0);
00373 CLOSEYUV2RGBFUNC(8)
00374 
00375 YUV2RGBFUNC(yuv2rgb_c_4b_ordered_dither, uint8_t)
00376     const uint8_t *d64 =  dither_8x8_73[y&7];
00377     const uint8_t *d128 = dither_8x8_220[y&7];
00378 
00379 #define PUTRGB4DB(dst,src,i,o)                                    \
00380     Y = src[2*i];                                                 \
00381     dst[2*i]   = r[Y+d128[0+o]] + g[Y+d64[0+o]] + b[Y+d128[0+o]]; \
00382     Y = src[2*i+1];                                               \
00383     dst[2*i+1] = r[Y+d128[1+o]] + g[Y+d64[1+o]] + b[Y+d128[1+o]];
00384 
00385     LOADCHROMA(0);
00386     PUTRGB4DB(dst_1,py_1,0,0);
00387     PUTRGB4DB(dst_2,py_2,0,0+8);
00388 
00389     LOADCHROMA(1);
00390     PUTRGB4DB(dst_2,py_2,1,2+8);
00391     PUTRGB4DB(dst_1,py_1,1,2);
00392 
00393     LOADCHROMA(2);
00394     PUTRGB4DB(dst_1,py_1,2,4);
00395     PUTRGB4DB(dst_2,py_2,2,4+8);
00396 
00397     LOADCHROMA(3);
00398     PUTRGB4DB(dst_2,py_2,3,6+8);
00399     PUTRGB4DB(dst_1,py_1,3,6);
00400 CLOSEYUV2RGBFUNC(8)
00401 
00402 YUV2RGBFUNC(yuv2rgb_c_1_ordered_dither, uint8_t)
00403         const uint8_t *d128 = dither_8x8_220[y&7];
00404         char out_1 = 0, out_2 = 0;
00405         g= c->table_gU[128] + c->table_gV[128];
00406 
00407 #define PUTRGB1(out,src,i,o)    \
00408     Y = src[2*i];               \
00409     out+= out + g[Y+d128[0+o]]; \
00410     Y = src[2*i+1];             \
00411     out+= out + g[Y+d128[1+o]];
00412 
00413     PUTRGB1(out_1,py_1,0,0);
00414     PUTRGB1(out_2,py_2,0,0+8);
00415 
00416     PUTRGB1(out_2,py_2,1,2+8);
00417     PUTRGB1(out_1,py_1,1,2);
00418 
00419     PUTRGB1(out_1,py_1,2,4);
00420     PUTRGB1(out_2,py_2,2,4+8);
00421 
00422     PUTRGB1(out_2,py_2,3,6+8);
00423     PUTRGB1(out_1,py_1,3,6);
00424 
00425     dst_1[0]= out_1;
00426     dst_2[0]= out_2;
00427 CLOSEYUV2RGBFUNC(1)
00428 
00429 SwsFunc sws_yuv2rgb_get_func_ptr(SwsContext *c)
00430 {
00431     SwsFunc t = NULL;
00432 #if (HAVE_MMX2 || HAVE_MMX) && CONFIG_GPL
00433     if (c->flags & SWS_CPU_CAPS_MMX2) {
00434         switch (c->dstFormat) {
00435         case PIX_FMT_RGB32:  return yuv420_rgb32_MMX2;
00436         case PIX_FMT_BGR24:  return yuv420_rgb24_MMX2;
00437         case PIX_FMT_RGB565: return yuv420_rgb16_MMX2;
00438         case PIX_FMT_RGB555: return yuv420_rgb15_MMX2;
00439         }
00440     }
00441     if (c->flags & SWS_CPU_CAPS_MMX) {
00442         switch (c->dstFormat) {
00443         case PIX_FMT_RGB32:  return yuv420_rgb32_MMX;
00444         case PIX_FMT_BGR24:  return yuv420_rgb24_MMX;
00445         case PIX_FMT_RGB565: return yuv420_rgb16_MMX;
00446         case PIX_FMT_RGB555: return yuv420_rgb15_MMX;
00447         }
00448     }
00449 #endif
00450 #if HAVE_VIS
00451     t = sws_yuv2rgb_init_vis(c);
00452 #endif
00453 #if CONFIG_MLIB
00454     t = sws_yuv2rgb_init_mlib(c);
00455 #endif
00456 #if HAVE_ALTIVEC
00457     if (c->flags & SWS_CPU_CAPS_ALTIVEC)
00458         t = sws_yuv2rgb_init_altivec(c);
00459 #endif
00460 
00461 #if ARCH_BFIN
00462     if (c->flags & SWS_CPU_CAPS_BFIN)
00463         t = sws_ff_bfin_yuv2rgb_get_func_ptr(c);
00464 #endif
00465 
00466     if (t)
00467         return t;
00468 
00469     av_log(c, AV_LOG_WARNING, "No accelerated colorspace conversion found.\n");
00470 
00471     switch (c->dstFormat) {
00472     case PIX_FMT_BGR32_1:
00473     case PIX_FMT_RGB32_1:
00474     case PIX_FMT_BGR32:
00475     case PIX_FMT_RGB32:      return yuv2rgb_c_32;
00476     case PIX_FMT_RGB24:      return yuv2rgb_c_24_rgb;
00477     case PIX_FMT_BGR24:      return yuv2rgb_c_24_bgr;
00478     case PIX_FMT_RGB565:
00479     case PIX_FMT_BGR565:
00480     case PIX_FMT_RGB555:
00481     case PIX_FMT_BGR555:     return yuv2rgb_c_16;
00482     case PIX_FMT_RGB8:
00483     case PIX_FMT_BGR8:       return yuv2rgb_c_8_ordered_dither;
00484     case PIX_FMT_RGB4:
00485     case PIX_FMT_BGR4:       return yuv2rgb_c_4_ordered_dither;
00486     case PIX_FMT_RGB4_BYTE:
00487     case PIX_FMT_BGR4_BYTE:  return yuv2rgb_c_4b_ordered_dither;
00488     case PIX_FMT_MONOBLACK:  return yuv2rgb_c_1_ordered_dither;
00489     default:
00490         assert(0);
00491     }
00492     return NULL;
00493 }
00494 
00495 static void fill_table(uint8_t* table[256], const int elemsize, const int inc, uint8_t *y_table)
00496 {
00497     int i;
00498     int64_t cb = 0;
00499 
00500     y_table -= elemsize * (inc >> 9);
00501 
00502     for (i = 0; i < 256; i++) {
00503         table[i] = y_table + elemsize * (cb >> 16);
00504         cb += inc;
00505     }
00506 }
00507 
00508 static void fill_gv_table(int table[256], const int elemsize, const int inc)
00509 {
00510     int i;
00511     int64_t cb = 0;
00512     int off = -(inc >> 9);
00513 
00514     for (i = 0; i < 256; i++) {
00515         table[i] = elemsize * (off + (cb >> 16));
00516         cb += inc;
00517     }
00518 }
00519 
00520 av_cold int sws_yuv2rgb_c_init_tables(SwsContext *c, const int inv_table[4], int fullRange,
00521                                       int brightness, int contrast, int saturation)
00522 {
00523     const int isRgb =      c->dstFormat==PIX_FMT_RGB32
00524                         || c->dstFormat==PIX_FMT_RGB32_1
00525                         || c->dstFormat==PIX_FMT_BGR24
00526                         || c->dstFormat==PIX_FMT_RGB565
00527                         || c->dstFormat==PIX_FMT_RGB555
00528                         || c->dstFormat==PIX_FMT_RGB8
00529                         || c->dstFormat==PIX_FMT_RGB4
00530                         || c->dstFormat==PIX_FMT_RGB4_BYTE
00531                         || c->dstFormat==PIX_FMT_MONOBLACK;
00532     const int bpp = fmt_depth(c->dstFormat);
00533     uint8_t *y_table;
00534     uint16_t *y_table16;
00535     uint32_t *y_table32;
00536     int i, base, rbase, gbase, bbase, abase;
00537     const int yoffs = fullRange ? 384 : 326;
00538 
00539     int64_t crv =  inv_table[0];
00540     int64_t cbu =  inv_table[1];
00541     int64_t cgu = -inv_table[2];
00542     int64_t cgv = -inv_table[3];
00543     int64_t cy  = 1<<16;
00544     int64_t oy  = 0;
00545 
00546     int64_t yb = 0;
00547 
00548     if (!fullRange) {
00549         cy = (cy*255) / 219;
00550         oy = 16<<16;
00551     } else {
00552         crv = (crv*224) / 255;
00553         cbu = (cbu*224) / 255;
00554         cgu = (cgu*224) / 255;
00555         cgv = (cgv*224) / 255;
00556     }
00557 
00558     cy  = (cy *contrast             ) >> 16;
00559     crv = (crv*contrast * saturation) >> 32;
00560     cbu = (cbu*contrast * saturation) >> 32;
00561     cgu = (cgu*contrast * saturation) >> 32;
00562     cgv = (cgv*contrast * saturation) >> 32;
00563     oy -= 256*brightness;
00564 
00565     //scale coefficients by cy
00566     crv = ((crv << 16) + 0x8000) / cy;
00567     cbu = ((cbu << 16) + 0x8000) / cy;
00568     cgu = ((cgu << 16) + 0x8000) / cy;
00569     cgv = ((cgv << 16) + 0x8000) / cy;
00570 
00571     av_free(c->yuvTable);
00572 
00573     switch (bpp) {
00574     case 1:
00575         c->yuvTable = av_malloc(1024);
00576         y_table = c->yuvTable;
00577         yb = -(384<<16) - oy;
00578         for (i = 0; i < 1024-110; i++) {
00579             y_table[i+110] = av_clip_uint8((yb + 0x8000) >> 16) >> 7;
00580             yb += cy;
00581         }
00582         fill_table(c->table_gU, 1, cgu, y_table + yoffs);
00583         fill_gv_table(c->table_gV, 1, cgv);
00584         break;
00585     case 4:
00586     case 4|128:
00587         rbase = isRgb ? 3 : 0;
00588         gbase = 1;
00589         bbase = isRgb ? 0 : 3;
00590         c->yuvTable = av_malloc(1024*3);
00591         y_table = c->yuvTable;
00592         yb = -(384<<16) - oy;
00593         for (i = 0; i < 1024-110; i++) {
00594             int yval = av_clip_uint8((yb + 0x8000) >> 16);
00595             y_table[i+110     ] =  (yval >> 7)       << rbase;
00596             y_table[i+ 37+1024] = ((yval + 43) / 85) << gbase;
00597             y_table[i+110+2048] =  (yval >> 7)       << bbase;
00598             yb += cy;
00599         }
00600         fill_table(c->table_rV, 1, crv, y_table + yoffs);
00601         fill_table(c->table_gU, 1, cgu, y_table + yoffs + 1024);
00602         fill_table(c->table_bU, 1, cbu, y_table + yoffs + 2048);
00603         fill_gv_table(c->table_gV, 1, cgv);
00604         break;
00605     case 8:
00606         rbase = isRgb ? 5 : 0;
00607         gbase = isRgb ? 2 : 3;
00608         bbase = isRgb ? 0 : 6;
00609         c->yuvTable = av_malloc(1024*3);
00610         y_table = c->yuvTable;
00611         yb = -(384<<16) - oy;
00612         for (i = 0; i < 1024-38; i++) {
00613             int yval = av_clip_uint8((yb + 0x8000) >> 16);
00614             y_table[i+16     ] = ((yval + 18) / 36) << rbase;
00615             y_table[i+16+1024] = ((yval + 18) / 36) << gbase;
00616             y_table[i+37+2048] = ((yval + 43) / 85) << bbase;
00617             yb += cy;
00618         }
00619         fill_table(c->table_rV, 1, crv, y_table + yoffs);
00620         fill_table(c->table_gU, 1, cgu, y_table + yoffs + 1024);
00621         fill_table(c->table_bU, 1, cbu, y_table + yoffs + 2048);
00622         fill_gv_table(c->table_gV, 1, cgv);
00623         break;
00624     case 15:
00625     case 16:
00626         rbase = isRgb ? bpp - 5 : 0;
00627         gbase = 5;
00628         bbase = isRgb ? 0 : (bpp - 5);
00629         c->yuvTable = av_malloc(1024*3*2);
00630         y_table16 = c->yuvTable;
00631         yb = -(384<<16) - oy;
00632         for (i = 0; i < 1024; i++) {
00633             uint8_t yval = av_clip_uint8((yb + 0x8000) >> 16);
00634             y_table16[i     ] = (yval >> 3)          << rbase;
00635             y_table16[i+1024] = (yval >> (18 - bpp)) << gbase;
00636             y_table16[i+2048] = (yval >> 3)          << bbase;
00637             yb += cy;
00638         }
00639         fill_table(c->table_rV, 2, crv, y_table16 + yoffs);
00640         fill_table(c->table_gU, 2, cgu, y_table16 + yoffs + 1024);
00641         fill_table(c->table_bU, 2, cbu, y_table16 + yoffs + 2048);
00642         fill_gv_table(c->table_gV, 2, cgv);
00643         break;
00644     case 24:
00645         c->yuvTable = av_malloc(1024);
00646         y_table = c->yuvTable;
00647         yb = -(384<<16) - oy;
00648         for (i = 0; i < 1024; i++) {
00649             y_table[i] = av_clip_uint8((yb + 0x8000) >> 16);
00650             yb += cy;
00651         }
00652         fill_table(c->table_rV, 1, crv, y_table + yoffs);
00653         fill_table(c->table_gU, 1, cgu, y_table + yoffs);
00654         fill_table(c->table_bU, 1, cbu, y_table + yoffs);
00655         fill_gv_table(c->table_gV, 1, cgv);
00656         break;
00657     case 32:
00658         base = (c->dstFormat == PIX_FMT_RGB32_1 || c->dstFormat == PIX_FMT_BGR32_1) ? 8 : 0;
00659         rbase = base + (isRgb ? 16 : 0);
00660         gbase = base + 8;
00661         bbase = base + (isRgb ? 0 : 16);
00662         abase = (base + 24) & 31;
00663         c->yuvTable = av_malloc(1024*3*4);
00664         y_table32 = c->yuvTable;
00665         yb = -(384<<16) - oy;
00666         for (i = 0; i < 1024; i++) {
00667             uint8_t yval = av_clip_uint8((yb + 0x8000) >> 16);
00668             y_table32[i     ] = (yval << rbase) + (255 << abase);
00669             y_table32[i+1024] = yval << gbase;
00670             y_table32[i+2048] = yval << bbase;
00671             yb += cy;
00672         }
00673         fill_table(c->table_rV, 4, crv, y_table32 + yoffs);
00674         fill_table(c->table_gU, 4, cgu, y_table32 + yoffs + 1024);
00675         fill_table(c->table_bU, 4, cbu, y_table32 + yoffs + 2048);
00676         fill_gv_table(c->table_gV, 4, cgv);
00677         break;
00678     default:
00679         c->yuvTable = NULL;
00680         av_log(c, AV_LOG_ERROR, "%ibpp not supported by yuv2rgb\n", bpp);
00681         return -1;
00682     }
00683     return 0;
00684 }