mirror of
https://github.com/game-stop/veejay.git
synced 2025-12-20 14:50:01 +01:00
120 lines
2.5 KiB
C
120 lines
2.5 KiB
C
/*
|
|
* Convert an image from yuv colourspace to rgb
|
|
*
|
|
* Code by Tony Hague (C) 2001.
|
|
*/
|
|
|
|
#include "ccvt.h"
|
|
#include "ccvt_types.h"
|
|
|
|
/* by suitable definition of PIXTYPE, can do yuv to rgb or bgr, with or
|
|
without word alignment */
|
|
|
|
/* This doesn't exactly earn a prize in a programming beauty contest. */
|
|
|
|
#define WHOLE_FUNC2RGB(type) \
|
|
const unsigned char *y1, *y2, *u, *v; \
|
|
PIXTYPE_##type *l1, *l2; \
|
|
int r, g, b, cr, cg, cb, yp, j, i; \
|
|
\
|
|
if ((width & 1) || (height & 1)) \
|
|
return; \
|
|
\
|
|
l1 = (PIXTYPE_##type *)dst; \
|
|
l2 = l1 + width; \
|
|
y1 = (unsigned char *)src; \
|
|
y2 = y1 + width; \
|
|
u = (unsigned char *)src + width * height; \
|
|
v = u + (width * height) / 4; \
|
|
j = height / 2; \
|
|
while (j--) { \
|
|
i = width / 2; \
|
|
while (i--) { \
|
|
/* Since U & V are valid for 4 pixels, repeat code 4 \
|
|
times for different Y */ \
|
|
cb = ((*u-128) * 454)>>8; \
|
|
cr = ((*v-128) * 359)>>8; \
|
|
cg = ((*v-128) * 183 + (*u-128) * 88)>>8; \
|
|
\
|
|
yp = *(y1++); \
|
|
r = yp + cr; \
|
|
b = yp + cb; \
|
|
g = yp - cg; \
|
|
SAT(r); \
|
|
SAT(g); \
|
|
SAT(b); \
|
|
l1->b = b; \
|
|
l1->g = g; \
|
|
l1->r = r; \
|
|
l1++; \
|
|
\
|
|
yp = *(y1++); \
|
|
r = yp + cr; \
|
|
b = yp + cb; \
|
|
g = yp - cg; \
|
|
SAT(r); \
|
|
SAT(g); \
|
|
SAT(b); \
|
|
l1->b = b; \
|
|
l1->g = g; \
|
|
l1->r = r; \
|
|
l1++; \
|
|
\
|
|
yp = *(y2++); \
|
|
r = yp + cr; \
|
|
b = yp + cb; \
|
|
g = yp - cg; \
|
|
SAT(r); \
|
|
SAT(g); \
|
|
SAT(b); \
|
|
l2->b = b; \
|
|
l2->g = g; \
|
|
l2->r = r; \
|
|
l2++; \
|
|
\
|
|
yp = *(y2++); \
|
|
r = yp + cr; \
|
|
b = yp + cb; \
|
|
g = yp - cg; \
|
|
SAT(r); \
|
|
SAT(g); \
|
|
SAT(b); \
|
|
l2->b = b; \
|
|
l2->g = g; \
|
|
l2->r = r; \
|
|
l2++; \
|
|
\
|
|
u++; \
|
|
v++; \
|
|
} \
|
|
y1 = y2; \
|
|
y2 += width; \
|
|
l1 = l2; \
|
|
l2 += width; \
|
|
}
|
|
|
|
|
|
|
|
|
|
void ccvt_420p_bgr32(int width, int height, const void *src, void *dst)
|
|
{
|
|
WHOLE_FUNC2RGB(bgr32)
|
|
}
|
|
|
|
void ccvt_420p_bgr24(int width, int height, const void *src, void *dst)
|
|
{
|
|
WHOLE_FUNC2RGB(bgr24)
|
|
}
|
|
|
|
void ccvt_420p_rgb32(int width, int height, const void *src, void *dst)
|
|
{
|
|
printf("bit smarter func\n");
|
|
WHOLE_FUNC2RGB(rgb32)
|
|
}
|
|
|
|
void ccvt_420p_rgb24(int width, int height, const void *src, void *dst)
|
|
{
|
|
WHOLE_FUNC2RGB(rgb24)
|
|
}
|
|
|