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Date: Thu, 16 Jan 2003 13:48:31 +0200
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From: "Mike Gorchak"

added help and options -mono to force monochrome RGB2YUB conversion and
-lum <percent> - luminance of image during conversion. Also rewritten code
which moves overlay into window. Now it depends on window size.
Also fully rewritten -scale option, image now scaling from 50% from center
of screen until border of window is reached - it really tests scaler, old
-scale test doesn't test downscale.
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@slouken
slouken committed Jan 20, 2003
1 parent f4bb2f3 commit bac60fe
Showing 1 changed file with 118 additions and 42 deletions.
160 changes: 118 additions & 42 deletions test/testoverlay.c
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Expand Up @@ -9,41 +9,71 @@

#define NOTICE(X) printf("%s", X);

#define WINDOW_WIDTH 640
#define WINDOW_HEIGHT 480

#include "SDL.h"

SDL_Surface *screen, *pic;
SDL_Overlay *overlay;
int scale;
int monochrome;
int luminance;
int w, h;

/* NOTE: These RGB conversion functions are not intended for speed,
only as examples.
*/

void RGBtoYUV(Uint8 *rgb, int *yuv)
void RGBtoYUV(Uint8 *rgb, int *yuv, int monochrome, int luminance)
{
int i;
int i;

if (monochrome)
{
#if 1 /* these are the two formulas that I found on the FourCC site... */
yuv[0] = 0.299*rgb[0] + 0.587*rgb[1] + 0.114*rgb[2];
yuv[1] = (rgb[2]-yuv[0])*0.565 + 128;
yuv[2] = (rgb[0]-yuv[0])*0.713 + 128;
yuv[0] = 0.299*rgb[0] + 0.587*rgb[1] + 0.114*rgb[2];
yuv[1] = 128;
yuv[2] = 128;
#else
yuv[0] = (0.257 * rgb[0]) + (0.504 * rgb[1]) + (0.098 * rgb[2]) + 16;
yuv[1] = 128 - (0.148 * rgb[0]) - (0.291 * rgb[1]) + (0.439 * rgb[2]);
yuv[2] = 128 + (0.439 * rgb[0]) - (0.368 * rgb[1]) - (0.071 * rgb[2]);
yuv[0] = (0.257 * rgb[0]) + (0.504 * rgb[1]) + (0.098 * rgb[2]) + 16;
yuv[1] = 128;
yuv[2] = 128;
#endif
/* clamp values...if you need to, we don't seem to have a need */
/*
for(i=0;i<3;i++)
{
if(yuv[i]<0)
yuv[i]=0;
if(yuv[i]>255)
yuv[i]=255;
}
*/
}
else
{
#if 1 /* these are the two formulas that I found on the FourCC site... */
yuv[0] = 0.299*rgb[0] + 0.587*rgb[1] + 0.114*rgb[2];
yuv[1] = (rgb[2]-yuv[0])*0.565 + 128;
yuv[2] = (rgb[0]-yuv[0])*0.713 + 128;
#else
yuv[0] = (0.257 * rgb[0]) + (0.504 * rgb[1]) + (0.098 * rgb[2]) + 16;
yuv[1] = 128 - (0.148 * rgb[0]) - (0.291 * rgb[1]) + (0.439 * rgb[2]);
yuv[2] = 128 + (0.439 * rgb[0]) - (0.368 * rgb[1]) - (0.071 * rgb[2]);
#endif
}

if (luminance!=100)
{
yuv[0]=yuv[0]*luminance/100;
if (yuv[0]>255)
yuv[0]=255;
}

/* clamp values...if you need to, we don't seem to have a need */
/*
for(i=0;i<3;i++)
{
if(yuv[i]<0)
yuv[i]=0;
if(yuv[i]>255)
yuv[i]=255;
}
*/
}

ConvertRGBtoYV12(SDL_Surface *s, SDL_Overlay *o)
ConvertRGBtoYV12(SDL_Surface *s, SDL_Overlay *o, int monochrome, int luminance)
{
int x,y;
int yuv[3];
Expand All @@ -68,7 +98,7 @@ ConvertRGBtoYV12(SDL_Surface *s, SDL_Overlay *o)
op[2]=o->pixels[2]+o->pitches[2]*(y/2);
for(x=0; x<s->w && x<o->w; x++)
{
RGBtoYUV(p,yuv);
RGBtoYUV(p, yuv, monochrome, luminance);
*(op[0]++)=yuv[0];
if(x%2==0 && y%2==0)
{
Expand All @@ -83,7 +113,7 @@ ConvertRGBtoYV12(SDL_Surface *s, SDL_Overlay *o)
SDL_UnlockSurface(s);
}

ConvertRGBtoIYUV(SDL_Surface *s, SDL_Overlay *o)
ConvertRGBtoIYUV(SDL_Surface *s, SDL_Overlay *o, int monochrome, int luminance)
{
int x,y;
int yuv[3];
Expand All @@ -108,7 +138,7 @@ ConvertRGBtoIYUV(SDL_Surface *s, SDL_Overlay *o)
op[2]=o->pixels[2]+o->pitches[2]*(y/2);
for(x=0; x<s->w && x<o->w; x++)
{
RGBtoYUV(p,yuv);
RGBtoYUV(p,yuv, monochrome, luminance);
*(op[0]++)=yuv[0];
if(x%2==0 && y%2==0)
{
Expand All @@ -123,7 +153,7 @@ ConvertRGBtoIYUV(SDL_Surface *s, SDL_Overlay *o)
SDL_UnlockSurface(s);
}

ConvertRGBtoUYVY(SDL_Surface *s, SDL_Overlay *o)
ConvertRGBtoUYVY(SDL_Surface *s, SDL_Overlay *o, int monochrome, int luminance)
{
int x,y;
int yuv[3];
Expand All @@ -138,7 +168,7 @@ ConvertRGBtoUYVY(SDL_Surface *s, SDL_Overlay *o)
op=o->pixels[0]+o->pitches[0]*y;
for(x=0; x<s->w && x<o->w; x++)
{
RGBtoYUV(p,yuv);
RGBtoYUV(p, yuv, monochrome, luminance);
if(x%2==0)
{
*(op++)=yuv[1];
Expand All @@ -156,7 +186,7 @@ ConvertRGBtoUYVY(SDL_Surface *s, SDL_Overlay *o)
SDL_UnlockSurface(s);
}

ConvertRGBtoYVYU(SDL_Surface *s, SDL_Overlay *o)
ConvertRGBtoYVYU(SDL_Surface *s, SDL_Overlay *o, int monochrome, int luminance)
{
int x,y;
int yuv[3];
Expand All @@ -171,7 +201,7 @@ ConvertRGBtoYVYU(SDL_Surface *s, SDL_Overlay *o)
op=o->pixels[0]+o->pitches[0]*y;
for(x=0; x<s->w && x<o->w; x++)
{
RGBtoYUV(p,yuv);
RGBtoYUV(p,yuv, monochrome, luminance);
if(x%2==0)
{
*(op++)=yuv[0];
Expand All @@ -192,7 +222,7 @@ ConvertRGBtoYVYU(SDL_Surface *s, SDL_Overlay *o)
SDL_UnlockSurface(s);
}

ConvertRGBtoYUY2(SDL_Surface *s, SDL_Overlay *o)
ConvertRGBtoYUY2(SDL_Surface *s, SDL_Overlay *o, int monochrome, int luminance)
{
int x,y;
int yuv[3];
Expand All @@ -207,7 +237,7 @@ ConvertRGBtoYUY2(SDL_Surface *s, SDL_Overlay *o)
op=o->pixels[0]+o->pitches[0]*y;
for(x=0; x<s->w && x<o->w; x++)
{
RGBtoYUV(p,yuv);
RGBtoYUV(p,yuv, monochrome, luminance);
if(x%2==0)
{
*(op++)=yuv[0];
Expand All @@ -232,12 +262,13 @@ void Draw()
{
SDL_Rect rect;
int i;
int disp;

if(!scale)
{
rect.w=overlay->w;
rect.h=overlay->h;
for(i=0; i<200; i++)
for(i=0; i<h-rect.h && i<w-rect.w; i++)
{
rect.x=i;
rect.y=i;
Expand All @@ -246,22 +277,45 @@ void Draw()
}
else
{
rect.w=screen->w;
rect.h=screen->h;
for(i=0; i<200; i++)
rect.w=overlay->w/2;
rect.h=overlay->h/2;
rect.x=(w-rect.w)/2;
rect.y=(h-rect.h)/2;
disp=rect.y-1;
for(i=0; i<disp; i++)
{
rect.x=i-199;
rect.y=i-199;
rect.w+=2;
rect.h+=2;
rect.x--;
rect.y--;
SDL_DisplayYUVOverlay(overlay,&rect);
}
}
printf("Displayed %d times.\n",i);
}

static void PrintUsage(char *argv0)
{
fprintf(stderr, "Usage: %s [arg] [arg] [arg] ...\n", argv0);
fprintf(stderr, "Where 'arg' is one of:\n");
fprintf(stderr, " -delay <seconds>\n");
fprintf(stderr, " -width <pixels>\n");
fprintf(stderr, " -height <pixels>\n");
fprintf(stderr, " -bpp <bits>\n");
fprintf(stderr, " -format <fmt> (one of the: YV12, IYUV, YUY2, UYVY, YVYU)\n");
fprintf(stderr, " -hw\n");
fprintf(stderr, " -flip\n");
fprintf(stderr, " -scale (test scaling features, from 50%% upto window size)\n");
fprintf(stderr, " -mono (use monochromatic RGB2YUV conversion)\n");
fprintf(stderr, " -lum <perc> (use luminance correction during RGB2YUV conversion,\n");
fprintf(stderr, " from 0%% to unlimited, normal is 100%%)\n");
fprintf(stderr, " -help (shows this help)\n");
fprintf(stderr, " -fullscreen (test overlay in fullscreen mode)\n");
}

int main(int argc, char **argv)
{
int flip;
int w, h;
int delay;
int desired_bpp;
Uint32 video_flags, overlay_format;
Expand All @@ -274,9 +328,11 @@ int main(int argc, char **argv)
/* Set default options and check command-line */
flip = 0;
scale=0;
monochrome=0;
luminance=100;
delay = 1;
w = 640;
h = 480;
w = WINDOW_WIDTH;
h = WINDOW_HEIGHT;
desired_bpp = 0;
video_flags = 0;
overlay_format = SDL_YV12_OVERLAY;
Expand Down Expand Up @@ -324,6 +380,17 @@ int main(int argc, char **argv)
exit(1);
}
} else
if ( strcmp(argv[1], "-lum") == 0 ) {
if ( argv[2] ) {
luminance = atoi(argv[2]);
argv += 2;
argc -= 2;
} else {
fprintf(stderr,
"The -lum option requires an argument\n");
exit(1);
}
} else
if ( strcmp(argv[1], "-format") == 0 ) {
if ( argv[2] ) {
if(!strcmp(argv[2],"YV12"))
Expand Down Expand Up @@ -364,6 +431,15 @@ int main(int argc, char **argv)
argv += 1;
argc -= 1;
} else
if ( strcmp(argv[1], "-mono") == 0 ) {
monochrome = 1;
argv += 1;
argc -= 1;
} else
if (( strcmp(argv[1], "-help") == 0 ) || (strcmp(argv[1], "-h") == 0)) {
PrintUsage(argv[0]);
exit(1);
} else
if ( strcmp(argv[1], "-fullscreen") == 0 ) {
video_flags |= SDL_FULLSCREEN;
argv += 1;
Expand Down Expand Up @@ -473,19 +549,19 @@ int main(int argc, char **argv)
switch(overlay->format)
{
case SDL_YV12_OVERLAY:
ConvertRGBtoYV12(pic,overlay);
ConvertRGBtoYV12(pic,overlay,monochrome,luminance);
break;
case SDL_UYVY_OVERLAY:
ConvertRGBtoUYVY(pic,overlay);
ConvertRGBtoUYVY(pic,overlay,monochrome,luminance);
break;
case SDL_YVYU_OVERLAY:
ConvertRGBtoYVYU(pic,overlay);
ConvertRGBtoYVYU(pic,overlay,monochrome,luminance);
break;
case SDL_YUY2_OVERLAY:
ConvertRGBtoYUY2(pic,overlay);
ConvertRGBtoYUY2(pic,overlay,monochrome,luminance);
break;
case SDL_IYUV_OVERLAY:
ConvertRGBtoIYUV(pic,overlay);
ConvertRGBtoIYUV(pic,overlay,monochrome,luminance);
break;
default:
printf("cannot convert RGB picture to obtained YUV format!\n");
Expand Down

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