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Get all the stride stuff right so that we actually get the colours

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right.

Originally committed as revision 1944 to svn://svn.ffmpeg.org/ffmpeg/trunk
This commit is contained in:
Philip Gladstone
2003-06-10 01:47:41 +00:00
parent 41fc0dd5a3
commit 25a2ee7dd6
1 changed files with 34 additions and 20 deletions
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54
vhook/fish.c
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@@ -45,14 +45,30 @@
#include "framehook.h"
#include "dsputil.h"
#define SCALE_BITS 10
#define C_Y (76309 >> (16 - SCALE_BITS))
#define C_RV (117504 >> (16 - SCALE_BITS))
#define C_BU (138453 >> (16 - SCALE_BITS))
#define C_GU (13954 >> (16 - SCALE_BITS))
#define C_GV (34903 >> (16 - SCALE_BITS))
#define SCALEBITS 10
#define ONE_HALF (1 << (SCALEBITS - 1))
#define FIX(x) ((int) ((x) * (1<<SCALEBITS) + 0.5))
#define YUV_TO_RGB1_CCIR(cb1, cr1)\
{\
cb = (cb1) - 128;\
cr = (cr1) - 128;\
r_add = FIX(1.40200*255.0/224.0) * cr + ONE_HALF;\
g_add = - FIX(0.34414*255.0/224.0) * cb - FIX(0.71414*255.0/224.0) * cr + \
ONE_HALF;\
b_add = FIX(1.77200*255.0/224.0) * cb + ONE_HALF;\
}
#define YUV_TO_RGB2_CCIR(r, g, b, y1)\
{\
yt = ((y1) - 16) * FIX(255.0/219.0);\
r = cm[(yt + r_add) >> SCALEBITS];\
g = cm[(yt + g_add) >> SCALEBITS];\
b = cm[(yt + b_add) >> SCALEBITS];\
}
typedef struct {
int h; /* 0 .. 360 */
@@ -154,6 +170,8 @@ int Configure(void **ctxp, int argc, char *argv[])
ci->bright.h,
ci->bright.s,
ci->bright.v);
fprintf(stderr, " Threshold is %d%% pixels\n", ci->threshold / 10);
return 0;
}
@@ -234,25 +252,19 @@ void Process(void *ctx, AVPicture *picture, enum PixelFormat pix_fmt, int width,
pixcnt = ((h_start - h_end) >> 1) * (w_start - w_end);
y = picture->data[0] + h_end * picture->linesize[0] + w_end * 2;
u = picture->data[1] + h_end * picture->linesize[1] + w_end;
v = picture->data[2] + h_end * picture->linesize[2] + w_end;
u = picture->data[1] + h_end * picture->linesize[1] / 2 + w_end;
v = picture->data[2] + h_end * picture->linesize[2] / 2 + w_end;
for (h = h_start; h > h_end; h -= 2) {
int w;
for (w = w_start; w > w_end; w--) {
int r,g,b;
int Y, U, V;
unsigned int r,g,b;
HSV hsv;
int cb, cr, yt, r_add, g_add, b_add;
U = u[0] - 128;
V = v[0] - 128;
Y = (y[0] - 16) * C_Y;
r = cm[(Y + C_RV * V + (1 << (SCALE_BITS - 1))) >> SCALE_BITS];
g = cm[(Y + - C_GU * U - C_GV * V + (1 << (SCALE_BITS - 1))) >> SCALE_BITS];
b = cm[(Y + C_BU * U + (1 << (SCALE_BITS - 1))) >> SCALE_BITS];
YUV_TO_RGB1_CCIR(u[0], v[0]);
YUV_TO_RGB2_CCIR(r, g, b, y[0]);
get_hsv(&hsv, r, g, b);
@@ -266,7 +278,9 @@ void Process(void *ctx, AVPicture *picture, enum PixelFormat pix_fmt, int width,
hsv.v >= ci->dark.v && hsv.v <= ci->bright.v) {
inrange++;
} else if (ci->zapping) {
y[0] = y[1] = y[rowsize] = y[rowsize + 1] = 0;
y[0] = y[1] = y[rowsize] = y[rowsize + 1] = 16;
u[0] = 128;
v[0] = 128;
}
y+= 2;