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16-bit and 15-bit rgb/bgr patch by (Joel Yliluoma <joel dot yliluoma at w-create dot com>) (note, rare formats disabled)

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Originally committed as revision 1212 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Joel Yliluoma 2002-11-14 19:46:14 +00:00 committed by Michael Niedermayer
parent 11f18fafca
commit a32072d0e9
3 changed files with 121 additions and 1 deletions
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1
Changelog
View File

@ -33,6 +33,7 @@ version 0.4.6pre1:
- VCD MPEG-PS mode. (Juanjo)
- PSNR stuff. (Juanjo)
- Simple stats output. (Juanjo)
- 16-bit and 15-bit rgb/bgr/gbr support (Bisqwit)
version 0.4.5:

9
libavcodec/avcodec.h
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@ -69,7 +69,14 @@ enum PixelFormat {
PIX_FMT_RGBA32,
PIX_FMT_BGRA32,
PIX_FMT_YUV410P,
PIX_FMT_YUV411P
PIX_FMT_YUV411P,
PIX_FMT_RGB565,
PIX_FMT_RGB555,
// PIX_FMT_RGB5551,
PIX_FMT_BGR565,
PIX_FMT_BGR555,
// PIX_FMT_GBR565,
// PIX_FMT_GBR555
};
/* currently unused, may be used if 24/32 bits samples ever supported */

112
libavcodec/imgconvert.c
View File

@ -184,6 +184,90 @@ static void rgba32_to_yuv420p(UINT8 *lum, UINT8 *cb, UINT8 *cr,
}
}
#define rgb565_to_yuv420p(lum,cb,cr,src,width,height) rgbmisc_to_yuv420p((lum),(cb),(cr),(src),(width),(height),0x0800,31, 0x0020,63,0x0001,31)
#define rgb555_to_yuv420p(lum,cb,cr,src,width,height) rgbmisc_to_yuv420p((lum),(cb),(cr),(src),(width),(height),0x0400,31, 0x0020,31,0x0001,31)
#define rgb5551_to_yuv420p(lum,cb,cr,src,width,height) rgbmisc_to_yuv420p((lum),(cb),(cr),(src),(width),(height),0x0800,31, 0x0040,31,0x0002,31)
#define bgr565_to_yuv420p(lum,cb,cr,src,width,height) rgbmisc_to_yuv420p((lum),(cb),(cr),(src),(width),(height),0x0001,31, 0x0020,63,0x0800,31)
#define bgr555_to_yuv420p(lum,cb,cr,src,width,height) rgbmisc_to_yuv420p((lum),(cb),(cr),(src),(width),(height),0x0001,31, 0x0020,31,0x0400,31)
#define gbr565_to_yuv420p(lum,cb,cr,src,width,height) rgbmisc_to_yuv420p((lum),(cb),(cr),(src),(width),(height),0x0001,31, 0x0800,31,0x0040,63)
#define gbr555_to_yuv420p(lum,cb,cr,src,width,height) rgbmisc_to_yuv420p((lum),(cb),(cr),(src),(width),(height),0x0001,31, 0x0400,31,0x0020,31)
static void rgbmisc_to_yuv420p
(UINT8 *lum, UINT8 *cb, UINT8 *cr,
UINT8 *src, int width, int height,
UINT16 R_LOWMASK, UINT16 R_MAX,
UINT16 G_LOWMASK, UINT16 G_MAX,
UINT16 B_LOWMASK, UINT16 B_MAX
)
{
int wrap, wrap2, x, y;
int r, g, b, r1, g1, b1;
UINT8 *p;
UINT16 pixel;
wrap = width;
wrap2 = width * 2;
p = src;
for(y=0;y<height;y+=2) {
for(x=0;x<width;x+=2) {
pixel = p[0] | (p[1]<<8);
r = (((pixel/R_LOWMASK) & R_MAX) * (0x100 / (R_MAX+1)));
g = (((pixel/G_LOWMASK) & G_MAX) * (0x100 / (G_MAX+1)));
b = (((pixel/B_LOWMASK) & B_MAX) * (0x100 / (B_MAX+1)));
r1 = r;
g1 = g;
b1 = b;
lum[0] = (FIX(0.29900) * r + FIX(0.58700) * g +
FIX(0.11400) * b + ONE_HALF) >> SCALEBITS;
pixel = p[2] | (p[3]<<8);
r = (((pixel/R_LOWMASK) & R_MAX) * (0x100 / (R_MAX+1)));
g = (((pixel/G_LOWMASK) & G_MAX) * (0x100 / (G_MAX+1)));
b = (((pixel/B_LOWMASK) & B_MAX) * (0x100 / (B_MAX+1)));
r1 += r;
g1 += g;
b1 += b;
lum[1] = (FIX(0.29900) * r + FIX(0.58700) * g +
FIX(0.11400) * b + ONE_HALF) >> SCALEBITS;
p += wrap2;
lum += wrap;
pixel = p[0] | (p[1]<<8);
r = (((pixel/R_LOWMASK) & R_MAX) * (0x100 / (R_MAX+1)));
g = (((pixel/G_LOWMASK) & G_MAX) * (0x100 / (G_MAX+1)));
b = (((pixel/B_LOWMASK) & B_MAX) * (0x100 / (B_MAX+1)));
r1 += r;
g1 += g;
b1 += b;
lum[0] = (FIX(0.29900) * r + FIX(0.58700) * g +
FIX(0.11400) * b + ONE_HALF) >> SCALEBITS;
pixel = p[2] | (p[3]<<8);
r = (((pixel/R_LOWMASK) & R_MAX) * (0x100 / (R_MAX+1)));
g = (((pixel/G_LOWMASK) & G_MAX) * (0x100 / (G_MAX+1)));
b = (((pixel/B_LOWMASK) & B_MAX) * (0x100 / (B_MAX+1)));
r1 += r;
g1 += g;
b1 += b;
lum[1] = (FIX(0.29900) * r + FIX(0.58700) * g +
FIX(0.11400) * b + ONE_HALF) >> SCALEBITS;
cb[0] = ((- FIX(0.16874) * r1 - FIX(0.33126) * g1 +
FIX(0.50000) * b1 + 4 * ONE_HALF - 1) >> (SCALEBITS + 2)) + 128;
cr[0] = ((FIX(0.50000) * r1 - FIX(0.41869) * g1 -
FIX(0.08131) * b1 + 4 * ONE_HALF - 1) >> (SCALEBITS + 2)) + 128;
cb++;
cr++;
p += -wrap2 + 2 * 2;
lum += -wrap + 2;
}
p += wrap2;
lum += wrap;
}
}
static void bgr24_to_yuv420p(UINT8 *lum, UINT8 *cb, UINT8 *cr,
UINT8 *src, int width, int height)
{
@ -730,6 +814,34 @@ int img_convert(AVPicture *dst, int dst_pix_fmt,
bgra32_to_yuv420p(dst->data[0], dst->data[1], dst->data[2],
src->data[0], width, height);
break;
case PIX_FMT_RGB565:
rgb565_to_yuv420p(dst->data[0], dst->data[1], dst->data[2],
src->data[0], width, height);
break;
case PIX_FMT_RGB555:
rgb555_to_yuv420p(dst->data[0], dst->data[1], dst->data[2],
src->data[0], width, height);
break;
/* case PIX_FMT_RGB5551:
rgb5551_to_yuv420p(dst->data[0], dst->data[1], dst->data[2],
src->data[0], width, height);
break;*/
case PIX_FMT_BGR565:
bgr565_to_yuv420p(dst->data[0], dst->data[1], dst->data[2],
src->data[0], width, height);
break;
case PIX_FMT_BGR555:
bgr555_to_yuv420p(dst->data[0], dst->data[1], dst->data[2],
src->data[0], width, height);
break;
/* case PIX_FMT_GBR565:
gbr565_to_yuv420p(dst->data[0], dst->data[1], dst->data[2],
src->data[0], width, height);
break;
case PIX_FMT_GBR555:
gbr555_to_yuv420p(dst->data[0], dst->data[1], dst->data[2],
src->data[0], width, height);
break;*/
default:
return -1;
}