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Added reasonable values for primaries in YUV space. Added second reverse blue pattern. Added a crummy but very fast...

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Original commit message from CVS:
Added reasonable values for primaries in YUV space.  Added second
reverse blue pattern.  Added a crummy but very fast RNG to replace
calls to random().
This commit is contained in:
David Schleef 2002-07-28 04:23:07 +00:00
parent 0d3e66a5aa
commit 768253dc38
1 changed files with 86 additions and 15 deletions
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101
gst/videotestsrc/gstvideotestsrc.c
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@ -306,29 +306,61 @@ gst_videotestsrc_setup (GstVideotestsrc *v)
} }
static void static void
random_chars(unsigned char *dest, int nbytes) random_chars(unsigned char *dest, int nbytes)
{ {
int i; int i;
static unsigned int state;
for(i=0;i<nbytes;i++){ for(i=0;i<nbytes;i++){
dest[i] = random(); state *= 1103515245;
state += 12345;
dest[i] = (state>>16);
} }
} }
static int u_colors[] = { 128, 0, 192, 0, 255, 64, 255 }; static void
static int v_colors[] = { 128, 192, 0, 0, 255, 255, 64 }; paint_rect_random (unsigned char *dest, int stride, int x, int y, int w, int h)
{
unsigned char *d = dest + stride*y + x;
int i;
for(i=0;i<h;i++){
random_chars(d,w);
d += stride;
}
}
static void
paint_rect (unsigned char *dest, int stride, int x, int y, int w, int h, unsigned char color)
{
unsigned char *d = dest + stride*y + x;
int i;
for(i=0;i<h;i++){
memset(d,color,w);
d += stride;
}
}
/* wht yel cya grn mag red blu blk -I Q */
static int y_colors[] = { 255, 226, 179, 150, 105, 76, 29, 0, 0, 0 };
static int u_colors[] = { 128, 0, 170, 46, 212, 85, 255, 128, 0, 128 };
static int v_colors[] = { 128, 155, 0, 21, 235, 255, 107, 128, 128, 255 };
static void static void
gst_videotestsrc_random_yuv (GstVideotestsrc *v, unsigned char *dest, int w, int h) gst_videotestsrc_random_yuv (GstVideotestsrc *v, unsigned char *dest, int w, int h)
{ {
unsigned char *yp = dest;
unsigned char *up = dest + w*h; unsigned char *up = dest + w*h;
unsigned char *vp = up + w*h/4; unsigned char *vp = up + w*h/4;
int w7; //int h24 = h/24;
int i,j; //int j,k;
int i;
int y1,y2;
memset(dest,255,w*h/2); #if 0
//memset(dest,255,w*h/2);
random_chars(dest + w*h/2,w*h/2); random_chars(dest + w*h/2,w*h/2);
//random_chars(dest + w*h, w*h/4); //random_chars(dest + w*h, w*h/4);
@ -336,17 +368,56 @@ gst_videotestsrc_random_yuv (GstVideotestsrc *v, unsigned char *dest, int w, int
//random_chars(dest + w*h + w*h/4, w*h/4); //random_chars(dest + w*h + w*h/4, w*h/4);
memset(dest + w*h + w*h/4, 128, w*h/4); memset(dest + w*h + w*h/4, 128, w*h/4);
#endif
w7 = w/2/7 + 1; y1 = h/3;
y2 = h*0.375;
/* color bars */
for(i=0;i<7;i++){ for(i=0;i<7;i++){
for(j=0;j<w7;j++){ int x1 = i*(w/2)/7;
up[i*w7 + j] = u_colors[i]; int x2 = (i+1)*(w/2)/7;
vp[i*w7 + j] = v_colors[i]; paint_rect(yp, w, x1*2, 0, (x2-x1)*2, y1*2, y_colors[i]);
} paint_rect(up, w/2, x1, 0, x2-x1, y1, u_colors[i]);
paint_rect(vp, w/2, x1, 0, x2-x1, y1, v_colors[i]);
} }
for(i=0;i<h/4;i++){
memcpy(up+(w/2)*i, up, w/2); /* inverse blue bars */
memcpy(vp+(w/2)*i, vp, w/2); for(i=0;i<7;i++){
int x1 = i*(w/2)/7;
int x2 = (i+1)*(w/2)/7;
int k;
if(i&1){
k = 7;
}else{
k = 6-i;
}
paint_rect(yp, w, x1*2, y1*2, (x2-x1)*2, (y2-y1)*2, y_colors[k]);
paint_rect(up, w/2, x1, y1, x2-x1, y2-y1, u_colors[k]);
paint_rect(vp, w/2, x1, y1, x2-x1, y2-y1, v_colors[k]);
}
/* -I, white, Q regions */
for(i=0;i<3;i++){
int x1 = i*(w/2)/6;
int x2 = (i+1)*(w/2)/6;
int k;
if(i==0){ k = 8; }
else if(i==1){ k = 0; }
else k = 9;
paint_rect(yp, w, x1*2, y2*2, (x2-x1)*2, h-y2*2, y_colors[k]);
paint_rect(up, w/2, x1, y2, x2-x1, h/2-y2, u_colors[k]);
paint_rect(vp, w/2, x1, y2, x2-x1, h/2-y2, v_colors[k]);
}
{
int x1 = 3*(w/2)/6;
int x2 = w/2;
paint_rect_random(yp, w, x1*2, y2*2, (x2-x1)*2, h-y2*2);
paint_rect(up, w/2, x1, y2, x2-x1, h/2-y2, u_colors[0]);
paint_rect(vp, w/2, x1, y2, x2-x1, h/2-y2, v_colors[0]);
} }
} }