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yuv2rgb: implement 15/16bit ordered dither

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Signed-off-by: Michael Niedermayer <michaelni@gmx.at>
This commit is contained in:
Michael Niedermayer 2012-07-17 04:47:23 +02:00
parent 1d903a5ee4
commit 22a279539e
2 changed files with 58 additions and 14 deletions
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4
libswscale/output.c
View File

@ -36,13 +36,13 @@
#include "swscale.h" #include "swscale.h"
#include "swscale_internal.h" #include "swscale_internal.h"
DECLARE_ALIGNED(8, static const uint8_t, dither_2x2_4)[][8]={ DECLARE_ALIGNED(8, const uint8_t, dither_2x2_4)[][8]={
{ 1, 3, 1, 3, 1, 3, 1, 3, }, { 1, 3, 1, 3, 1, 3, 1, 3, },
{ 2, 0, 2, 0, 2, 0, 2, 0, }, { 2, 0, 2, 0, 2, 0, 2, 0, },
{ 1, 3, 1, 3, 1, 3, 1, 3, }, { 1, 3, 1, 3, 1, 3, 1, 3, },
}; };
DECLARE_ALIGNED(8, static const uint8_t, dither_2x2_8)[][8]={ DECLARE_ALIGNED(8, const uint8_t, dither_2x2_8)[][8]={
{ 6, 2, 6, 2, 6, 2, 6, 2, }, { 6, 2, 6, 2, 6, 2, 6, 2, },
{ 0, 4, 0, 4, 0, 4, 0, 4, }, { 0, 4, 0, 4, 0, 4, 0, 4, },
{ 6, 2, 6, 2, 6, 2, 6, 2, }, { 6, 2, 6, 2, 6, 2, 6, 2, },

68
libswscale/yuv2rgb.c
View File

@ -35,6 +35,8 @@
#include "swscale_internal.h" #include "swscale_internal.h"
#include "libavutil/pixdesc.h" #include "libavutil/pixdesc.h"
extern const uint8_t dither_2x2_4[2][8];
extern const uint8_t dither_2x2_8[2][8];
extern const uint8_t dither_4x4_16[4][8]; extern const uint8_t dither_4x4_16[4][8];
extern const uint8_t dither_8x8_32[8][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_73[8][8];
@ -355,24 +357,65 @@ ENDYUV2RGBLINE(24)
PUTBGR24(dst_1, py_1, 1); PUTBGR24(dst_1, py_1, 1);
ENDYUV2RGBFUNC() ENDYUV2RGBFUNC()
// This is exactly the same code as yuv2rgb_c_32 except for the types of YUV2RGBFUNC(yuv2rgb_c_16_ordered_dither, uint16_t, 0)
// r, g, b, dst_1, dst_2 const uint8_t *d16 = dither_2x2_8[y & 1];
YUV2RGBFUNC(yuv2rgb_c_16, uint16_t, 0) const uint8_t *e16 = dither_2x2_4[y & 1];
const uint8_t *f16 = dither_2x2_8[(y & 1)^1];
#define PUTRGB16(dst, src, i, o) \
Y = src[2 * i]; \
dst[2 * i] = r[Y + d16[0 + o]] + \
g[Y + e16[0 + o]] + \
b[Y + f16[0 + o]]; \
Y = src[2 * i + 1]; \
dst[2 * i + 1] = r[Y + d16[1 + o]] + \
g[Y + e16[1 + o]] + \
b[Y + f16[1 + o]];
LOADCHROMA(0); LOADCHROMA(0);
PUTRGB(dst_1, py_1, 0); PUTRGB16(dst_1, py_1, 0, 0);
PUTRGB(dst_2, py_2, 0); PUTRGB16(dst_2, py_2, 0, 0 + 8);
LOADCHROMA(1); LOADCHROMA(1);
PUTRGB(dst_2, py_2, 1); PUTRGB16(dst_2, py_2, 1, 2 + 8);
PUTRGB(dst_1, py_1, 1); PUTRGB16(dst_1, py_1, 1, 2);
LOADCHROMA(2); LOADCHROMA(2);
PUTRGB(dst_1, py_1, 2); PUTRGB16(dst_1, py_1, 2, 4);
PUTRGB(dst_2, py_2, 2); PUTRGB16(dst_2, py_2, 2, 4 + 8);
LOADCHROMA(3); LOADCHROMA(3);
PUTRGB(dst_2, py_2, 3); PUTRGB16(dst_2, py_2, 3, 6 + 8);
PUTRGB(dst_1, py_1, 3); PUTRGB16(dst_1, py_1, 3, 6);
CLOSEYUV2RGBFUNC(8)
YUV2RGBFUNC(yuv2rgb_c_15_ordered_dither, uint16_t, 0)
const uint8_t *d16 = dither_2x2_8[y & 1];
const uint8_t *e16 = dither_2x2_8[(y & 1)^1];
#define PUTRGB15(dst, src, i, o) \
Y = src[2 * i]; \
dst[2 * i] = r[Y + d16[0 + o]] + \
g[Y + d16[1 + o]] + \
b[Y + e16[0 + o]]; \
Y = src[2 * i + 1]; \
dst[2 * i + 1] = r[Y + d16[1 + o]] + \
g[Y + d16[0 + o]] + \
b[Y + e16[1 + o]];
LOADCHROMA(0);
PUTRGB15(dst_1, py_1, 0, 0);
PUTRGB15(dst_2, py_2, 0, 0 + 8);
LOADCHROMA(1);
PUTRGB15(dst_2, py_2, 1, 2 + 8);
PUTRGB15(dst_1, py_1, 1, 2);
LOADCHROMA(2);
PUTRGB15(dst_1, py_1, 2, 4);
PUTRGB15(dst_2, py_2, 2, 4 + 8);
LOADCHROMA(3);
PUTRGB15(dst_2, py_2, 3, 6 + 8);
PUTRGB15(dst_1, py_1, 3, 6);
CLOSEYUV2RGBFUNC(8) CLOSEYUV2RGBFUNC(8)
// r, g, b, dst_1, dst_2 // r, g, b, dst_1, dst_2
@ -569,9 +612,10 @@ SwsFunc ff_yuv2rgb_get_func_ptr(SwsContext *c)
return yuv2rgb_c_24_bgr; return yuv2rgb_c_24_bgr;
case PIX_FMT_RGB565: case PIX_FMT_RGB565:
case PIX_FMT_BGR565: case PIX_FMT_BGR565:
return yuv2rgb_c_16_ordered_dither;
case PIX_FMT_RGB555: case PIX_FMT_RGB555:
case PIX_FMT_BGR555: case PIX_FMT_BGR555:
return yuv2rgb_c_16; return yuv2rgb_c_15_ordered_dither;
case PIX_FMT_RGB444: case PIX_FMT_RGB444:
case PIX_FMT_BGR444: case PIX_FMT_BGR444:
return yuv2rgb_c_12_ordered_dither; return yuv2rgb_c_12_ordered_dither;