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yuv2rgb.c
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yuv2rgb.c
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/*
* software YUV to RGB converter
*
* Copyright (C) 2009 Konstantin Shishkov
*
* 1,4,8bpp support and context / deglobalize stuff
* by Michael Niedermayer (michaelni@gmx.at)
*
* This file is part of FFmpeg.
*
* FFmpeg is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* FFmpeg is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with FFmpeg; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*/
#include <stdio.h>
#include <stdlib.h>
#include <inttypes.h>
#include <assert.h>
#include "config.h"
#include "rgb2rgb.h"
#include "swscale.h"
#include "swscale_internal.h"
#include "libavutil/x86_cpu.h"
#include "libavutil/bswap.h"
extern const uint8_t dither_4x4_16[4][8];
extern const uint8_t dither_8x8_32[8][8];
extern const uint8_t dither_8x8_73[8][8];
extern const uint8_t dither_8x8_220[8][8];
const int32_t ff_yuv2rgb_coeffs[8][4] = {
{117504, 138453, 13954, 34903}, /* no sequence_display_extension */
{117504, 138453, 13954, 34903}, /* ITU-R Rec. 709 (1990) */
{104597, 132201, 25675, 53279}, /* unspecified */
{104597, 132201, 25675, 53279}, /* reserved */
{104448, 132798, 24759, 53109}, /* FCC */
{104597, 132201, 25675, 53279}, /* ITU-R Rec. 624-4 System B, G */
{104597, 132201, 25675, 53279}, /* SMPTE 170M */
{117579, 136230, 16907, 35559} /* SMPTE 240M (1987) */
};
const int *sws_getCoefficients(int colorspace)
{
if (colorspace > 7 || colorspace < 0)
colorspace = SWS_CS_DEFAULT;
return ff_yuv2rgb_coeffs[colorspace];
}
#define LOADCHROMA(i) \
U = pu[i]; \
V = pv[i]; \
r = (void *)c->table_rV[V]; \
g = (void *)(c->table_gU[U] + c->table_gV[V]); \
b = (void *)c->table_bU[U];
#define PUTRGB(dst,src,i) \
Y = src[2*i]; \
dst[2*i ] = r[Y] + g[Y] + b[Y]; \
Y = src[2*i+1]; \
dst[2*i+1] = r[Y] + g[Y] + b[Y];
#define PUTRGB24(dst,src,i) \
Y = src[2*i]; \
dst[6*i+0] = r[Y]; dst[6*i+1] = g[Y]; dst[6*i+2] = b[Y]; \
Y = src[2*i+1]; \
dst[6*i+3] = r[Y]; dst[6*i+4] = g[Y]; dst[6*i+5] = b[Y];
#define PUTBGR24(dst,src,i) \
Y = src[2*i]; \
dst[6*i+0] = b[Y]; dst[6*i+1] = g[Y]; dst[6*i+2] = r[Y]; \
Y = src[2*i+1]; \
dst[6*i+3] = b[Y]; dst[6*i+4] = g[Y]; dst[6*i+5] = r[Y];
#define PUTRGBA(dst,ysrc,asrc,i,s) \
Y = ysrc[2*i]; \
dst[2*i ] = r[Y] + g[Y] + b[Y] + (asrc[2*i ]<<s); \
Y = ysrc[2*i+1]; \
dst[2*i+1] = r[Y] + g[Y] + b[Y] + (asrc[2*i+1]<<s);
#define PUTRGB48(dst,src,i) \
Y = src[2*i]; \
dst[12*i+ 0] = dst[12*i+ 1] = r[Y]; \
dst[12*i+ 2] = dst[12*i+ 3] = g[Y]; \
dst[12*i+ 4] = dst[12*i+ 5] = b[Y]; \
Y = src[2*i+1]; \
dst[12*i+ 6] = dst[12*i+ 7] = r[Y]; \
dst[12*i+ 8] = dst[12*i+ 9] = g[Y]; \
dst[12*i+10] = dst[12*i+11] = b[Y];
#define YUV2RGBFUNC(func_name, dst_type, alpha) \
static int func_name(SwsContext *c, const uint8_t* src[], int srcStride[], int srcSliceY, \
int srcSliceH, uint8_t* dst[], int dstStride[]) \
{\
int y;\
\
if (!alpha && c->srcFormat == PIX_FMT_YUV422P) {\
srcStride[1] *= 2;\
srcStride[2] *= 2;\
}\
for (y=0; y<srcSliceH; y+=2) {\
dst_type *dst_1 = (dst_type*)(dst[0] + (y+srcSliceY )*dstStride[0]);\
dst_type *dst_2 = (dst_type*)(dst[0] + (y+srcSliceY+1)*dstStride[0]);\
dst_type av_unused *r, *b;\
dst_type *g;\
const uint8_t *py_1 = src[0] + y*srcStride[0];\
const uint8_t *py_2 = py_1 + srcStride[0];\
const uint8_t *pu = src[1] + (y>>1)*srcStride[1];\
const uint8_t *pv = src[2] + (y>>1)*srcStride[2];\
const uint8_t av_unused *pa_1, *pa_2;\
unsigned int h_size = c->dstW>>3;\
if (alpha) {\
pa_1 = src[3] + y*srcStride[3];\
pa_2 = pa_1 + srcStride[3];\
}\
while (h_size--) {\
int av_unused U, V;\
int Y;\
#define ENDYUV2RGBLINE(dst_delta)\
pu += 4;\
pv += 4;\
py_1 += 8;\
py_2 += 8;\
dst_1 += dst_delta;\
dst_2 += dst_delta;\
}\
if (c->dstW & 4) {\
int av_unused Y, U, V;\
#define ENDYUV2RGBFUNC()\
}\
}\
return srcSliceH;\
}
#define CLOSEYUV2RGBFUNC(dst_delta)\
ENDYUV2RGBLINE(dst_delta)\
ENDYUV2RGBFUNC()
YUV2RGBFUNC(yuv2rgb_c_48, uint8_t, 0)
LOADCHROMA(0);
PUTRGB48(dst_1,py_1,0);
PUTRGB48(dst_2,py_2,0);
LOADCHROMA(1);
PUTRGB48(dst_2,py_2,1);
PUTRGB48(dst_1,py_1,1);
LOADCHROMA(2);
PUTRGB48(dst_1,py_1,2);
PUTRGB48(dst_2,py_2,2);
LOADCHROMA(3);
PUTRGB48(dst_2,py_2,3);
PUTRGB48(dst_1,py_1,3);
ENDYUV2RGBLINE(48)
LOADCHROMA(0);
PUTRGB48(dst_1,py_1,0);
PUTRGB48(dst_2,py_2,0);
LOADCHROMA(1);
PUTRGB48(dst_2,py_2,1);
PUTRGB48(dst_1,py_1,1);
ENDYUV2RGBFUNC()
YUV2RGBFUNC(yuv2rgb_c_32, uint32_t, 0)
LOADCHROMA(0);
PUTRGB(dst_1,py_1,0);
PUTRGB(dst_2,py_2,0);
LOADCHROMA(1);
PUTRGB(dst_2,py_2,1);
PUTRGB(dst_1,py_1,1);
LOADCHROMA(2);
PUTRGB(dst_1,py_1,2);
PUTRGB(dst_2,py_2,2);
LOADCHROMA(3);
PUTRGB(dst_2,py_2,3);
PUTRGB(dst_1,py_1,3);
ENDYUV2RGBLINE(8)
LOADCHROMA(0);
PUTRGB(dst_1,py_1,0);
PUTRGB(dst_2,py_2,0);
LOADCHROMA(1);
PUTRGB(dst_2,py_2,1);
PUTRGB(dst_1,py_1,1);
ENDYUV2RGBFUNC()
YUV2RGBFUNC(yuva2rgba_c, uint32_t, 1)
LOADCHROMA(0);
PUTRGBA(dst_1,py_1,pa_1,0,24);
PUTRGBA(dst_2,py_2,pa_2,0,24);
LOADCHROMA(1);
PUTRGBA(dst_2,py_2,pa_1,1,24);
PUTRGBA(dst_1,py_1,pa_2,1,24);
LOADCHROMA(2);
PUTRGBA(dst_1,py_1,pa_1,2,24);
PUTRGBA(dst_2,py_2,pa_2,2,24);
LOADCHROMA(3);
PUTRGBA(dst_2,py_2,pa_1,3,24);
PUTRGBA(dst_1,py_1,pa_2,3,24);
pa_1 += 8;\
pa_2 += 8;\
ENDYUV2RGBLINE(8)
LOADCHROMA(0);
PUTRGBA(dst_1,py_1,pa_1,0,24);
PUTRGBA(dst_2,py_2,pa_2,0,24);
LOADCHROMA(1);
PUTRGBA(dst_2,py_2,pa_1,1,24);
PUTRGBA(dst_1,py_1,pa_2,1,24);
ENDYUV2RGBFUNC()
YUV2RGBFUNC(yuva2argb_c, uint32_t, 1)
LOADCHROMA(0);
PUTRGBA(dst_1,py_1,pa_1,0,0);
PUTRGBA(dst_2,py_2,pa_2,0,0);
LOADCHROMA(1);
PUTRGBA(dst_2,py_2,pa_2,1,0);
PUTRGBA(dst_1,py_1,pa_1,1,0);
LOADCHROMA(2);
PUTRGBA(dst_1,py_1,pa_1,2,0);
PUTRGBA(dst_2,py_2,pa_2,2,0);
LOADCHROMA(3);
PUTRGBA(dst_2,py_2,pa_2,3,0);
PUTRGBA(dst_1,py_1,pa_1,3,0);
pa_1 += 8;\
pa_2 += 8;\
ENDYUV2RGBLINE(8)
LOADCHROMA(0);
PUTRGBA(dst_1,py_1,pa_1,0,0);
PUTRGBA(dst_2,py_2,pa_2,0,0);
LOADCHROMA(1);
PUTRGBA(dst_2,py_2,pa_2,1,0);
PUTRGBA(dst_1,py_1,pa_1,1,0);
ENDYUV2RGBFUNC()
YUV2RGBFUNC(yuv2rgb_c_24_rgb, uint8_t, 0)
LOADCHROMA(0);
PUTRGB24(dst_1,py_1,0);
PUTRGB24(dst_2,py_2,0);
LOADCHROMA(1);
PUTRGB24(dst_2,py_2,1);
PUTRGB24(dst_1,py_1,1);
LOADCHROMA(2);
PUTRGB24(dst_1,py_1,2);
PUTRGB24(dst_2,py_2,2);
LOADCHROMA(3);
PUTRGB24(dst_2,py_2,3);
PUTRGB24(dst_1,py_1,3);
ENDYUV2RGBLINE(24)
LOADCHROMA(0);
PUTRGB24(dst_1,py_1,0);
PUTRGB24(dst_2,py_2,0);
LOADCHROMA(1);
PUTRGB24(dst_2,py_2,1);
PUTRGB24(dst_1,py_1,1);
ENDYUV2RGBFUNC()
// only trivial mods from yuv2rgb_c_24_rgb
YUV2RGBFUNC(yuv2rgb_c_24_bgr, uint8_t, 0)
LOADCHROMA(0);
PUTBGR24(dst_1,py_1,0);
PUTBGR24(dst_2,py_2,0);
LOADCHROMA(1);
PUTBGR24(dst_2,py_2,1);
PUTBGR24(dst_1,py_1,1);
LOADCHROMA(2);
PUTBGR24(dst_1,py_1,2);
PUTBGR24(dst_2,py_2,2);
LOADCHROMA(3);
PUTBGR24(dst_2,py_2,3);
PUTBGR24(dst_1,py_1,3);
ENDYUV2RGBLINE(24)
LOADCHROMA(0);
PUTBGR24(dst_1,py_1,0);
PUTBGR24(dst_2,py_2,0);
LOADCHROMA(1);
PUTBGR24(dst_2,py_2,1);
PUTBGR24(dst_1,py_1,1);
ENDYUV2RGBFUNC()
// This is exactly the same code as yuv2rgb_c_32 except for the types of
// r, g, b, dst_1, dst_2
YUV2RGBFUNC(yuv2rgb_c_16, uint16_t, 0)
LOADCHROMA(0);
PUTRGB(dst_1,py_1,0);
PUTRGB(dst_2,py_2,0);
LOADCHROMA(1);
PUTRGB(dst_2,py_2,1);
PUTRGB(dst_1,py_1,1);
LOADCHROMA(2);
PUTRGB(dst_1,py_1,2);
PUTRGB(dst_2,py_2,2);
LOADCHROMA(3);
PUTRGB(dst_2,py_2,3);
PUTRGB(dst_1,py_1,3);
CLOSEYUV2RGBFUNC(8)
#if 0 // Currently unused
// This is exactly the same code as yuv2rgb_c_32 except for the types of
// r, g, b, dst_1, dst_2
YUV2RGBFUNC(yuv2rgb_c_8, uint8_t, 0)
LOADCHROMA(0);
PUTRGB(dst_1,py_1,0);
PUTRGB(dst_2,py_2,0);
LOADCHROMA(1);
PUTRGB(dst_2,py_2,1);
PUTRGB(dst_1,py_1,1);
LOADCHROMA(2);
PUTRGB(dst_1,py_1,2);
PUTRGB(dst_2,py_2,2);
LOADCHROMA(3);
PUTRGB(dst_2,py_2,3);
PUTRGB(dst_1,py_1,3);
CLOSEYUV2RGBFUNC(8)
#endif
// r, g, b, dst_1, dst_2
YUV2RGBFUNC(yuv2rgb_c_12_ordered_dither, uint16_t, 0)
const uint8_t *d16 = dither_4x4_16[y&3];
#define PUTRGB12(dst,src,i,o) \
Y = src[2*i]; \
dst[2*i] = r[Y+d16[0+o]] + g[Y+d16[0+o]] + b[Y+d16[0+o]]; \
Y = src[2*i+1]; \
dst[2*i+1] = r[Y+d16[1+o]] + g[Y+d16[1+o]] + b[Y+d16[1+o]];
LOADCHROMA(0);
PUTRGB12(dst_1,py_1,0,0);
PUTRGB12(dst_2,py_2,0,0+8);
LOADCHROMA(1);
PUTRGB12(dst_2,py_2,1,2+8);
PUTRGB12(dst_1,py_1,1,2);
LOADCHROMA(2);
PUTRGB12(dst_1,py_1,2,4);
PUTRGB12(dst_2,py_2,2,4+8);
LOADCHROMA(3);
PUTRGB12(dst_2,py_2,3,6+8);
PUTRGB12(dst_1,py_1,3,6);
CLOSEYUV2RGBFUNC(8)
// r, g, b, dst_1, dst_2
YUV2RGBFUNC(yuv2rgb_c_8_ordered_dither, uint8_t, 0)
const uint8_t *d32 = dither_8x8_32[y&7];
const uint8_t *d64 = dither_8x8_73[y&7];
#define PUTRGB8(dst,src,i,o) \
Y = src[2*i]; \
dst[2*i] = r[Y+d32[0+o]] + g[Y+d32[0+o]] + b[Y+d64[0+o]]; \
Y = src[2*i+1]; \
dst[2*i+1] = r[Y+d32[1+o]] + g[Y+d32[1+o]] + b[Y+d64[1+o]];
LOADCHROMA(0);
PUTRGB8(dst_1,py_1,0,0);
PUTRGB8(dst_2,py_2,0,0+8);
LOADCHROMA(1);
PUTRGB8(dst_2,py_2,1,2+8);
PUTRGB8(dst_1,py_1,1,2);
LOADCHROMA(2);
PUTRGB8(dst_1,py_1,2,4);
PUTRGB8(dst_2,py_2,2,4+8);
LOADCHROMA(3);
PUTRGB8(dst_2,py_2,3,6+8);
PUTRGB8(dst_1,py_1,3,6);
CLOSEYUV2RGBFUNC(8)
#if 0 // Currently unused
// This is exactly the same code as yuv2rgb_c_32 except for the types of
// r, g, b, dst_1, dst_2
YUV2RGBFUNC(yuv2rgb_c_4, uint8_t, 0)
int acc;
#define PUTRGB4(dst,src,i) \
Y = src[2*i]; \
acc = r[Y] + g[Y] + b[Y]; \
Y = src[2*i+1]; \
acc |= (r[Y] + g[Y] + b[Y])<<4; \
dst[i] = acc;
LOADCHROMA(0);
PUTRGB4(dst_1,py_1,0);
PUTRGB4(dst_2,py_2,0);
LOADCHROMA(1);
PUTRGB4(dst_2,py_2,1);
PUTRGB4(dst_1,py_1,1);
LOADCHROMA(2);
PUTRGB4(dst_1,py_1,2);
PUTRGB4(dst_2,py_2,2);
LOADCHROMA(3);
PUTRGB4(dst_2,py_2,3);
PUTRGB4(dst_1,py_1,3);
CLOSEYUV2RGBFUNC(4)
#endif
YUV2RGBFUNC(yuv2rgb_c_4_ordered_dither, uint8_t, 0)
const uint8_t *d64 = dither_8x8_73[y&7];
const uint8_t *d128 = dither_8x8_220[y&7];
int acc;
#define PUTRGB4D(dst,src,i,o) \
Y = src[2*i]; \
acc = r[Y+d128[0+o]] + g[Y+d64[0+o]] + b[Y+d128[0+o]]; \
Y = src[2*i+1]; \
acc |= (r[Y+d128[1+o]] + g[Y+d64[1+o]] + b[Y+d128[1+o]])<<4; \
dst[i]= acc;
LOADCHROMA(0);
PUTRGB4D(dst_1,py_1,0,0);
PUTRGB4D(dst_2,py_2,0,0+8);
LOADCHROMA(1);
PUTRGB4D(dst_2,py_2,1,2+8);
PUTRGB4D(dst_1,py_1,1,2);
LOADCHROMA(2);
PUTRGB4D(dst_1,py_1,2,4);
PUTRGB4D(dst_2,py_2,2,4+8);
LOADCHROMA(3);
PUTRGB4D(dst_2,py_2,3,6+8);
PUTRGB4D(dst_1,py_1,3,6);
CLOSEYUV2RGBFUNC(4)
#if 0 // Currently unused
// This is exactly the same code as yuv2rgb_c_32 except for the types of
// r, g, b, dst_1, dst_2
YUV2RGBFUNC(yuv2rgb_c_4b, uint8_t, 0)
LOADCHROMA(0);
PUTRGB(dst_1,py_1,0);
PUTRGB(dst_2,py_2,0);
LOADCHROMA(1);
PUTRGB(dst_2,py_2,1);
PUTRGB(dst_1,py_1,1);
LOADCHROMA(2);
PUTRGB(dst_1,py_1,2);
PUTRGB(dst_2,py_2,2);
LOADCHROMA(3);
PUTRGB(dst_2,py_2,3);
PUTRGB(dst_1,py_1,3);
CLOSEYUV2RGBFUNC(8)
#endif
YUV2RGBFUNC(yuv2rgb_c_4b_ordered_dither, uint8_t, 0)
const uint8_t *d64 = dither_8x8_73[y&7];
const uint8_t *d128 = dither_8x8_220[y&7];
#define PUTRGB4DB(dst,src,i,o) \
Y = src[2*i]; \
dst[2*i] = r[Y+d128[0+o]] + g[Y+d64[0+o]] + b[Y+d128[0+o]]; \
Y = src[2*i+1]; \
dst[2*i+1] = r[Y+d128[1+o]] + g[Y+d64[1+o]] + b[Y+d128[1+o]];
LOADCHROMA(0);
PUTRGB4DB(dst_1,py_1,0,0);
PUTRGB4DB(dst_2,py_2,0,0+8);
LOADCHROMA(1);
PUTRGB4DB(dst_2,py_2,1,2+8);
PUTRGB4DB(dst_1,py_1,1,2);
LOADCHROMA(2);
PUTRGB4DB(dst_1,py_1,2,4);
PUTRGB4DB(dst_2,py_2,2,4+8);
LOADCHROMA(3);
PUTRGB4DB(dst_2,py_2,3,6+8);
PUTRGB4DB(dst_1,py_1,3,6);
CLOSEYUV2RGBFUNC(8)
YUV2RGBFUNC(yuv2rgb_c_1_ordered_dither, uint8_t, 0)
const uint8_t *d128 = dither_8x8_220[y&7];
char out_1 = 0, out_2 = 0;
g= c->table_gU[128] + c->table_gV[128];
#define PUTRGB1(out,src,i,o) \
Y = src[2*i]; \
out+= out + g[Y+d128[0+o]]; \
Y = src[2*i+1]; \
out+= out + g[Y+d128[1+o]];
PUTRGB1(out_1,py_1,0,0);
PUTRGB1(out_2,py_2,0,0+8);
PUTRGB1(out_2,py_2,1,2+8);
PUTRGB1(out_1,py_1,1,2);
PUTRGB1(out_1,py_1,2,4);
PUTRGB1(out_2,py_2,2,4+8);
PUTRGB1(out_2,py_2,3,6+8);
PUTRGB1(out_1,py_1,3,6);
dst_1[0]= out_1;
dst_2[0]= out_2;
CLOSEYUV2RGBFUNC(1)
SwsFunc ff_yuv2rgb_get_func_ptr(SwsContext *c)
{
SwsFunc t = NULL;
#if HAVE_MMX
t = ff_yuv2rgb_init_mmx(c);
#endif
#if HAVE_VIS
t = ff_yuv2rgb_init_vis(c);
#endif
#if CONFIG_MLIB
t = ff_yuv2rgb_init_mlib(c);
#endif
#if HAVE_ALTIVEC
if (c->flags & SWS_CPU_CAPS_ALTIVEC)
t = ff_yuv2rgb_init_altivec(c);
#endif
#if ARCH_BFIN
if (c->flags & SWS_CPU_CAPS_BFIN)
t = ff_yuv2rgb_get_func_ptr_bfin(c);
#endif
if (t)
return t;
av_log(c, AV_LOG_WARNING, "No accelerated colorspace conversion found from %s to %s.\n", sws_format_name(c->srcFormat), sws_format_name(c->dstFormat));
switch (c->dstFormat) {
case PIX_FMT_RGB48BE:
case PIX_FMT_RGB48LE: return yuv2rgb_c_48;
case PIX_FMT_ARGB:
case PIX_FMT_ABGR: if (CONFIG_SWSCALE_ALPHA && c->srcFormat == PIX_FMT_YUVA420P) return yuva2argb_c;
case PIX_FMT_RGBA:
case PIX_FMT_BGRA: return (CONFIG_SWSCALE_ALPHA && c->srcFormat == PIX_FMT_YUVA420P) ? yuva2rgba_c : yuv2rgb_c_32;
case PIX_FMT_RGB24: return yuv2rgb_c_24_rgb;
case PIX_FMT_BGR24: return yuv2rgb_c_24_bgr;
case PIX_FMT_RGB565:
case PIX_FMT_BGR565:
case PIX_FMT_RGB555:
case PIX_FMT_BGR555: return yuv2rgb_c_16;
case PIX_FMT_RGB444:
case PIX_FMT_BGR444: return yuv2rgb_c_12_ordered_dither;
case PIX_FMT_RGB8:
case PIX_FMT_BGR8: return yuv2rgb_c_8_ordered_dither;
case PIX_FMT_RGB4:
case PIX_FMT_BGR4: return yuv2rgb_c_4_ordered_dither;
case PIX_FMT_RGB4_BYTE:
case PIX_FMT_BGR4_BYTE: return yuv2rgb_c_4b_ordered_dither;
case PIX_FMT_MONOBLACK: return yuv2rgb_c_1_ordered_dither;
default:
assert(0);
}
return NULL;
}
static void fill_table(uint8_t* table[256], const int elemsize, const int inc, uint8_t *y_table)
{
int i;
int64_t cb = 0;
y_table -= elemsize * (inc >> 9);
for (i = 0; i < 256; i++) {
table[i] = y_table + elemsize * (cb >> 16);
cb += inc;
}
}
static void fill_gv_table(int table[256], const int elemsize, const int inc)
{
int i;
int64_t cb = 0;
int off = -(inc >> 9);
for (i = 0; i < 256; i++) {
table[i] = elemsize * (off + (cb >> 16));
cb += inc;
}
}
av_cold int ff_yuv2rgb_c_init_tables(SwsContext *c, const int inv_table[4], int fullRange,
int brightness, int contrast, int saturation)
{
const int isRgb = c->dstFormat==PIX_FMT_RGB32
|| c->dstFormat==PIX_FMT_RGB32_1
|| c->dstFormat==PIX_FMT_BGR24
|| c->dstFormat==PIX_FMT_RGB565BE
|| c->dstFormat==PIX_FMT_RGB565LE
|| c->dstFormat==PIX_FMT_RGB555BE
|| c->dstFormat==PIX_FMT_RGB555LE
|| c->dstFormat==PIX_FMT_RGB444BE
|| c->dstFormat==PIX_FMT_RGB444LE
|| c->dstFormat==PIX_FMT_RGB8
|| c->dstFormat==PIX_FMT_RGB4
|| c->dstFormat==PIX_FMT_RGB4_BYTE
|| c->dstFormat==PIX_FMT_MONOBLACK;
const int isNotNe = c->dstFormat==PIX_FMT_NE(RGB565LE,RGB565BE)
|| c->dstFormat==PIX_FMT_NE(RGB555LE,RGB555BE)
|| c->dstFormat==PIX_FMT_NE(RGB444LE,RGB444BE)
|| c->dstFormat==PIX_FMT_NE(BGR565LE,BGR565BE)
|| c->dstFormat==PIX_FMT_NE(BGR555LE,BGR555BE)
|| c->dstFormat==PIX_FMT_NE(BGR444LE,BGR444BE);
const int bpp = c->dstFormatBpp;
uint8_t *y_table;
uint16_t *y_table16;
uint32_t *y_table32;
int i, base, rbase, gbase, bbase, abase, needAlpha;
const int yoffs = fullRange ? 384 : 326;
int64_t crv = inv_table[0];
int64_t cbu = inv_table[1];
int64_t cgu = -inv_table[2];
int64_t cgv = -inv_table[3];
int64_t cy = 1<<16;
int64_t oy = 0;
int64_t yb = 0;
if (!fullRange) {
cy = (cy*255) / 219;
oy = 16<<16;
} else {
crv = (crv*224) / 255;
cbu = (cbu*224) / 255;
cgu = (cgu*224) / 255;
cgv = (cgv*224) / 255;
}
cy = (cy *contrast ) >> 16;
crv = (crv*contrast * saturation) >> 32;
cbu = (cbu*contrast * saturation) >> 32;
cgu = (cgu*contrast * saturation) >> 32;
cgv = (cgv*contrast * saturation) >> 32;
oy -= 256*brightness;
//scale coefficients by cy
crv = ((crv << 16) + 0x8000) / cy;
cbu = ((cbu << 16) + 0x8000) / cy;
cgu = ((cgu << 16) + 0x8000) / cy;
cgv = ((cgv << 16) + 0x8000) / cy;
av_free(c->yuvTable);
switch (bpp) {
case 1:
c->yuvTable = av_malloc(1024);
y_table = c->yuvTable;
yb = -(384<<16) - oy;
for (i = 0; i < 1024-110; i++) {
y_table[i+110] = av_clip_uint8((yb + 0x8000) >> 16) >> 7;
yb += cy;
}
fill_table(c->table_gU, 1, cgu, y_table + yoffs);
fill_gv_table(c->table_gV, 1, cgv);
break;
case 4:
case 4|128:
rbase = isRgb ? 3 : 0;
gbase = 1;
bbase = isRgb ? 0 : 3;
c->yuvTable = av_malloc(1024*3);
y_table = c->yuvTable;
yb = -(384<<16) - oy;
for (i = 0; i < 1024-110; i++) {
int yval = av_clip_uint8((yb + 0x8000) >> 16);
y_table[i+110 ] = (yval >> 7) << rbase;
y_table[i+ 37+1024] = ((yval + 43) / 85) << gbase;
y_table[i+110+2048] = (yval >> 7) << bbase;
yb += cy;
}
fill_table(c->table_rV, 1, crv, y_table + yoffs);
fill_table(c->table_gU, 1, cgu, y_table + yoffs + 1024);
fill_table(c->table_bU, 1, cbu, y_table + yoffs + 2048);
fill_gv_table(c->table_gV, 1, cgv);
break;
case 8:
rbase = isRgb ? 5 : 0;
gbase = isRgb ? 2 : 3;
bbase = isRgb ? 0 : 6;
c->yuvTable = av_malloc(1024*3);
y_table = c->yuvTable;
yb = -(384<<16) - oy;
for (i = 0; i < 1024-38; i++) {
int yval = av_clip_uint8((yb + 0x8000) >> 16);
y_table[i+16 ] = ((yval + 18) / 36) << rbase;
y_table[i+16+1024] = ((yval + 18) / 36) << gbase;
y_table[i+37+2048] = ((yval + 43) / 85) << bbase;
yb += cy;
}
fill_table(c->table_rV, 1, crv, y_table + yoffs);
fill_table(c->table_gU, 1, cgu, y_table + yoffs + 1024);
fill_table(c->table_bU, 1, cbu, y_table + yoffs + 2048);
fill_gv_table(c->table_gV, 1, cgv);
break;
case 12:
rbase = isRgb ? 8 : 0;
gbase = 4;
bbase = isRgb ? 0 : 8;
c->yuvTable = av_malloc(1024*3*2);
y_table16 = c->yuvTable;
yb = -(384<<16) - oy;
for (i = 0; i < 1024; i++) {
uint8_t yval = av_clip_uint8((yb + 0x8000) >> 16);
y_table16[i ] = (yval >> 4) << rbase;
y_table16[i+1024] = (yval >> 4) << gbase;
y_table16[i+2048] = (yval >> 4) << bbase;
yb += cy;
}
if (isNotNe)
for (i = 0; i < 1024*3; i++)
y_table16[i] = bswap_16(y_table16[i]);
fill_table(c->table_rV, 2, crv, y_table16 + yoffs);
fill_table(c->table_gU, 2, cgu, y_table16 + yoffs + 1024);
fill_table(c->table_bU, 2, cbu, y_table16 + yoffs + 2048);
fill_gv_table(c->table_gV, 2, cgv);
break;
case 15:
case 16:
rbase = isRgb ? bpp - 5 : 0;
gbase = 5;
bbase = isRgb ? 0 : (bpp - 5);
c->yuvTable = av_malloc(1024*3*2);
y_table16 = c->yuvTable;
yb = -(384<<16) - oy;
for (i = 0; i < 1024; i++) {
uint8_t yval = av_clip_uint8((yb + 0x8000) >> 16);
y_table16[i ] = (yval >> 3) << rbase;
y_table16[i+1024] = (yval >> (18 - bpp)) << gbase;
y_table16[i+2048] = (yval >> 3) << bbase;
yb += cy;
}
if(isNotNe)
for (i = 0; i < 1024*3; i++)
y_table16[i] = bswap_16(y_table16[i]);
fill_table(c->table_rV, 2, crv, y_table16 + yoffs);
fill_table(c->table_gU, 2, cgu, y_table16 + yoffs + 1024);
fill_table(c->table_bU, 2, cbu, y_table16 + yoffs + 2048);
fill_gv_table(c->table_gV, 2, cgv);
break;
case 24:
case 48:
c->yuvTable = av_malloc(1024);
y_table = c->yuvTable;
yb = -(384<<16) - oy;
for (i = 0; i < 1024; i++) {
y_table[i] = av_clip_uint8((yb + 0x8000) >> 16);
yb += cy;
}
fill_table(c->table_rV, 1, crv, y_table + yoffs);
fill_table(c->table_gU, 1, cgu, y_table + yoffs);
fill_table(c->table_bU, 1, cbu, y_table + yoffs);
fill_gv_table(c->table_gV, 1, cgv);
break;
case 32:
base = (c->dstFormat == PIX_FMT_RGB32_1 || c->dstFormat == PIX_FMT_BGR32_1) ? 8 : 0;
rbase = base + (isRgb ? 16 : 0);
gbase = base + 8;
bbase = base + (isRgb ? 0 : 16);
needAlpha = CONFIG_SWSCALE_ALPHA && isALPHA(c->srcFormat);
if (!needAlpha)
abase = (base + 24) & 31;
c->yuvTable = av_malloc(1024*3*4);
y_table32 = c->yuvTable;
yb = -(384<<16) - oy;
for (i = 0; i < 1024; i++) {
uint8_t yval = av_clip_uint8((yb + 0x8000) >> 16);
y_table32[i ] = (yval << rbase) + (needAlpha ? 0 : (255 << abase));
y_table32[i+1024] = yval << gbase;
y_table32[i+2048] = yval << bbase;
yb += cy;
}
fill_table(c->table_rV, 4, crv, y_table32 + yoffs);
fill_table(c->table_gU, 4, cgu, y_table32 + yoffs + 1024);
fill_table(c->table_bU, 4, cbu, y_table32 + yoffs + 2048);
fill_gv_table(c->table_gV, 4, cgv);
break;
default:
c->yuvTable = NULL;
av_log(c, AV_LOG_ERROR, "%ibpp not supported by yuv2rgb\n", bpp);
return -1;
}
return 0;
}