[sdl_omap.git] / test / testoverlay.c


/* Bring up a window and play with it */

#include <stdlib.h>
#include <stdio.h>
#include <string.h>

#define BENCHMARK_SDL

#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;

/* Call this instead of exit(), so we can clean up SDL: atexit() is evil. */
static void quit(int rc)
{
	SDL_Quit();
	exit(rc);
}

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

void RGBtoYUV(Uint8 *rgb, int *yuv, int monochrome, int luminance)
{
    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] = 128;
        yuv[2] = 128;
#else
        yuv[0] = (0.257 * rgb[0]) + (0.504 * rgb[1]) + (0.098 * rgb[2]) + 16;
        yuv[1] = 128;
        yuv[2] = 128;
#endif
    }
    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;
    }
    */
}

void ConvertRGBtoYV12(SDL_Surface *s, SDL_Overlay *o, int monochrome, int luminance)
{
	int x,y;
	int yuv[3];
	Uint8 *p,*op[3];

	SDL_LockSurface(s);
	SDL_LockYUVOverlay(o);

	/* Black initialization */
	/*
	memset(o->pixels[0],0,o->pitches[0]*o->h);
	memset(o->pixels[1],128,o->pitches[1]*((o->h+1)/2));
	memset(o->pixels[2],128,o->pitches[2]*((o->h+1)/2));
	*/

	/* Convert */
	for(y=0; y<s->h && y<o->h; y++)
	{
		p=((Uint8 *) s->pixels)+s->pitch*y;
		op[0]=o->pixels[0]+o->pitches[0]*y;
		op[1]=o->pixels[1]+o->pitches[1]*(y/2);
		op[2]=o->pixels[2]+o->pitches[2]*(y/2);
		for(x=0; x<s->w && x<o->w; x++)
		{
			RGBtoYUV(p, yuv, monochrome, luminance);
			*(op[0]++)=yuv[0];
			if(x%2==0 && y%2==0)
			{
				*(op[1]++)=yuv[2];
				*(op[2]++)=yuv[1];
			}
			p+=s->format->BytesPerPixel;
		}
	}

	SDL_UnlockYUVOverlay(o);
	SDL_UnlockSurface(s);
}

void ConvertRGBtoIYUV(SDL_Surface *s, SDL_Overlay *o, int monochrome, int luminance)
{
	int x,y;
	int yuv[3];
	Uint8 *p,*op[3];

	SDL_LockSurface(s);
	SDL_LockYUVOverlay(o);

	/* Black initialization */
	/*
	memset(o->pixels[0],0,o->pitches[0]*o->h);
	memset(o->pixels[1],128,o->pitches[1]*((o->h+1)/2));
	memset(o->pixels[2],128,o->pitches[2]*((o->h+1)/2));
	*/

	/* Convert */
	for(y=0; y<s->h && y<o->h; y++)
	{
		p=((Uint8 *) s->pixels)+s->pitch*y;
		op[0]=o->pixels[0]+o->pitches[0]*y;
		op[1]=o->pixels[1]+o->pitches[1]*(y/2);
		op[2]=o->pixels[2]+o->pitches[2]*(y/2);
		for(x=0; x<s->w && x<o->w; x++)
		{
			RGBtoYUV(p,yuv, monochrome, luminance);
			*(op[0]++)=yuv[0];
			if(x%2==0 && y%2==0)
			{
				*(op[1]++)=yuv[1];
				*(op[2]++)=yuv[2];
			}
			p+=s->format->BytesPerPixel;
		}
	}

	SDL_UnlockYUVOverlay(o);
	SDL_UnlockSurface(s);
}

void ConvertRGBtoUYVY(SDL_Surface *s, SDL_Overlay *o, int monochrome, int luminance)
{
	int x,y;
	int yuv[3];
	Uint8 *p,*op;

	SDL_LockSurface(s);
	SDL_LockYUVOverlay(o);

	for(y=0; y<s->h && y<o->h; y++)
	{
		p=((Uint8 *) s->pixels)+s->pitch*y;
		op=o->pixels[0]+o->pitches[0]*y;
		for(x=0; x<s->w && x<o->w; x++)
		{
			RGBtoYUV(p, yuv, monochrome, luminance);
			if(x%2==0)
			{
				*(op++)=yuv[1];
				*(op++)=yuv[0];
				*(op++)=yuv[2];
			}
			else
				*(op++)=yuv[0];

			p+=s->format->BytesPerPixel;
		}
	}

	SDL_UnlockYUVOverlay(o);
	SDL_UnlockSurface(s);
}

void ConvertRGBtoYVYU(SDL_Surface *s, SDL_Overlay *o, int monochrome, int luminance)
{
	int x,y;
	int yuv[3];
	Uint8 *p,*op;

	SDL_LockSurface(s);
	SDL_LockYUVOverlay(o);

	for(y=0; y<s->h && y<o->h; y++)
	{
		p=((Uint8 *) s->pixels)+s->pitch*y;
		op=o->pixels[0]+o->pitches[0]*y;
		for(x=0; x<s->w && x<o->w; x++)
		{
			RGBtoYUV(p,yuv, monochrome, luminance);
			if(x%2==0)
			{
				*(op++)=yuv[0];
				*(op++)=yuv[2];
				op[1]=yuv[1];
			}
			else
			{
				*op=yuv[0];
				op+=2;
			}

			p+=s->format->BytesPerPixel;
		}
	}

	SDL_UnlockYUVOverlay(o);
	SDL_UnlockSurface(s);
}

void ConvertRGBtoYUY2(SDL_Surface *s, SDL_Overlay *o, int monochrome, int luminance)
{
	int x,y;
	int yuv[3];
	Uint8 *p,*op;

	SDL_LockSurface(s);
	SDL_LockYUVOverlay(o);

	for(y=0; y<s->h && y<o->h; y++)
	{
		p=((Uint8 *) s->pixels)+s->pitch*y;
		op=o->pixels[0]+o->pitches[0]*y;
		for(x=0; x<s->w && x<o->w; x++)
		{
			RGBtoYUV(p,yuv, monochrome, luminance);
			if(x%2==0)
			{
				*(op++)=yuv[0];
				*(op++)=yuv[1];
				op[1]=yuv[2];
			}
			else
			{
				*op=yuv[0];
				op+=2;
			}

			p+=s->format->BytesPerPixel;
		}
	}

	SDL_UnlockYUVOverlay(o);
	SDL_UnlockSurface(s);
}

void Draw()
{
	SDL_Rect rect;
	int i;
        int disp;

	if(!scale)
	{
		rect.w=overlay->w;
		rect.h=overlay->h;
		for(i=0; i<h-rect.h && i<w-rect.w; i++)
		{
			rect.x=i;
			rect.y=i;
			SDL_DisplayYUVOverlay(overlay,&rect);
		}
	}
	else
	{
		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.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)
{
	char *argv0 = argv[0];
	int flip;
	int delay;
	int desired_bpp;
	Uint32 video_flags, overlay_format;
	char *bmpfile;
#ifdef BENCHMARK_SDL
	Uint32 then, now;
#endif
	int i;

	/* Set default options and check command-line */
	flip = 0;
	scale=0;
        monochrome=0;
        luminance=100;
	delay = 1;
	w = WINDOW_WIDTH;
	h = WINDOW_HEIGHT;
	desired_bpp = 0;
	video_flags = 0;
	overlay_format = SDL_YV12_OVERLAY;

	while ( argc > 1 ) {
		if ( strcmp(argv[1], "-delay") == 0 ) {
			if ( argv[2] ) {
				delay = atoi(argv[2]);
				argv += 2;
				argc -= 2;
			} else {
				fprintf(stderr,
				"The -delay option requires an argument\n");
				return(1);
			}
		} else
		if ( strcmp(argv[1], "-width") == 0 ) {
			if ( argv[2] && ((w = atoi(argv[2])) > 0) ) {
				argv += 2;
				argc -= 2;
			} else {
				fprintf(stderr,
				"The -width option requires an argument\n");
				return(1);
			}
		} else
		if ( strcmp(argv[1], "-height") == 0 ) {
			if ( argv[2] && ((h = atoi(argv[2])) > 0) ) {
				argv += 2;
				argc -= 2;
			} else {
				fprintf(stderr,
				"The -height option requires an argument\n");
				return(1);
			}
		} else
		if ( strcmp(argv[1], "-bpp") == 0 ) {
			if ( argv[2] ) {
				desired_bpp = atoi(argv[2]);
				argv += 2;
				argc -= 2;
			} else {
				fprintf(stderr,
				"The -bpp option requires an argument\n");
				return(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");
				return(1);
			}
		} else
		if ( strcmp(argv[1], "-format") == 0 ) {
			if ( argv[2] ) {
				if(!strcmp(argv[2],"YV12"))
					overlay_format = SDL_YV12_OVERLAY;
				else if(!strcmp(argv[2],"IYUV"))
					overlay_format = SDL_IYUV_OVERLAY;
				else if(!strcmp(argv[2],"YUY2"))
					overlay_format = SDL_YUY2_OVERLAY;
				else if(!strcmp(argv[2],"UYVY"))
					overlay_format = SDL_UYVY_OVERLAY;
				else if(!strcmp(argv[2],"YVYU"))
					overlay_format = SDL_YVYU_OVERLAY;
				else
				{
					fprintf(stderr, "The -format option %s is not recognized\n",argv[2]);
					return(1);
				}
				argv += 2;
				argc -= 2;
			} else {
				fprintf(stderr,
				"The -format option requires an argument\n");
				return(1);
			}
		} else
		if ( strcmp(argv[1], "-hw") == 0 ) {
			video_flags |= SDL_HWSURFACE;
			argv += 1;
			argc -= 1;
		} else
		if ( strcmp(argv[1], "-flip") == 0 ) {
			video_flags |= SDL_DOUBLEBUF;
			argv += 1;
			argc -= 1;
		} else
		if ( strcmp(argv[1], "-scale") == 0 ) {
			scale = 1;
			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(argv0);
                        return(1);
		} else
		if ( strcmp(argv[1], "-fullscreen") == 0 ) {
			video_flags |= SDL_FULLSCREEN;
			argv += 1;
			argc -= 1;
		} else
			break;
	}
	if ( SDL_Init(SDL_INIT_VIDEO) < 0 ) {
		fprintf(stderr,
			"Couldn't initialize SDL: %s\n", SDL_GetError());
		return(1);
	}

	/* Initialize the display */
	screen = SDL_SetVideoMode(w, h, desired_bpp, video_flags);
	if ( screen == NULL ) {
		fprintf(stderr, "Couldn't set %dx%dx%d video mode: %s\n",
					w, h, desired_bpp, SDL_GetError());
		quit(1);
	}
	printf("Set%s %dx%dx%d mode\n",
			screen->flags & SDL_FULLSCREEN ? " fullscreen" : "",
			screen->w, screen->h, screen->format->BitsPerPixel);
	printf("(video surface located in %s memory)\n",
			(screen->flags&SDL_HWSURFACE) ? "video" : "system");
	if ( screen->flags & SDL_DOUBLEBUF ) {
		printf("Double-buffering enabled\n");
		flip = 1;
	}

	/* Set the window manager title bar */
	SDL_WM_SetCaption("SDL test overlay", "testoverlay");

	/* Load picture */
	bmpfile=(argv[1]?argv[1]:"sample.bmp");
	pic = SDL_LoadBMP(bmpfile);
	if ( pic == NULL ) {
		fprintf(stderr, "Couldn't load %s: %s\n", bmpfile,
							SDL_GetError());
		quit(1);
	}

	/* Convert the picture to 32bits, for easy conversion */
	{
		SDL_Surface *newsurf;
		SDL_PixelFormat format;

		format.palette=NULL;
		format.BitsPerPixel=32;
		format.BytesPerPixel=4;
#if SDL_BYTEORDER == SDL_LIL_ENDIAN
		format.Rshift=0;
		format.Gshift=8;
		format.Bshift=16;
#else
		format.Rshift=24;
		format.Gshift=16;
		format.Bshift=8;
#endif
		format.Ashift=0;
		format.Rmask=0xff<<format.Rshift;
		format.Gmask=0xff<<format.Gshift;
		format.Bmask=0xff<<format.Bshift;
		format.Amask=0;
		format.Rloss=0;
		format.Gloss=0;
		format.Bloss=0;
		format.Aloss=8;
		format.colorkey=0;
		format.alpha=0;

		newsurf=SDL_ConvertSurface(pic, &format, SDL_SWSURFACE);
		if(!newsurf)
		{
			fprintf(stderr, "Couldn't convert picture to 32bits RGB: %s\n",
							SDL_GetError());
			quit(1);
		}
		SDL_FreeSurface(pic);
		pic=newsurf;
	}
	
	/* Create the overlay */
	overlay = SDL_CreateYUVOverlay(pic->w, pic->h, overlay_format, screen);
	if ( overlay == NULL ) {
		fprintf(stderr, "Couldn't create overlay: %s\n", SDL_GetError());
		quit(1);
	}
	printf("Created %dx%dx%d %s %s overlay\n",overlay->w,overlay->h,overlay->planes,
			overlay->hw_overlay?"hardware":"software",
			overlay->format==SDL_YV12_OVERLAY?"YV12":
			overlay->format==SDL_IYUV_OVERLAY?"IYUV":
			overlay->format==SDL_YUY2_OVERLAY?"YUY2":
			overlay->format==SDL_UYVY_OVERLAY?"UYVY":
			overlay->format==SDL_YVYU_OVERLAY?"YVYU":
			"Unknown");
	for(i=0; i<overlay->planes; i++)
	{
		printf("  plane %d: pitch=%d\n", i, overlay->pitches[i]);
	}
	
	/* Convert to YUV, and draw to the overlay */
#ifdef BENCHMARK_SDL
	then = SDL_GetTicks();
#endif
	switch(overlay->format)
	{
		case SDL_YV12_OVERLAY:
			ConvertRGBtoYV12(pic,overlay,monochrome,luminance);
			break;
		case SDL_UYVY_OVERLAY:
			ConvertRGBtoUYVY(pic,overlay,monochrome,luminance);
			break;
		case SDL_YVYU_OVERLAY:
			ConvertRGBtoYVYU(pic,overlay,monochrome,luminance);
			break;
		case SDL_YUY2_OVERLAY:
			ConvertRGBtoYUY2(pic,overlay,monochrome,luminance);
			break;
		case SDL_IYUV_OVERLAY:
			ConvertRGBtoIYUV(pic,overlay,monochrome,luminance);
			break;
		default:
			printf("cannot convert RGB picture to obtained YUV format!\n");
			quit(1);
			break;
	}
#ifdef BENCHMARK_SDL
	now = SDL_GetTicks();
	printf("Conversion Time: %d milliseconds\n", now-then);
#endif
	
	/* Do all the drawing work */
#ifdef BENCHMARK_SDL
	then = SDL_GetTicks();
#endif
	Draw();
#ifdef BENCHMARK_SDL
	now = SDL_GetTicks();
	printf("Time: %d milliseconds\n", now-then);
#endif
	SDL_Delay(delay*1000);
	SDL_Quit();
	return(0);
}
Commit	Line	Data
e14743d1	1
	2	/* Bring up a window and play with it */
	3
	4	#include <stdlib.h>
	5	#include <stdio.h>
	6	#include <string.h>
	7
	8	#define BENCHMARK_SDL
	9
	10	#define NOTICE(X) printf("%s", X);
	11
	12	#define WINDOW_WIDTH 640
	13	#define WINDOW_HEIGHT 480
	14
	15	#include "SDL.h"
	16
	17	SDL_Surface screen, pic;
	18	SDL_Overlay *overlay;
	19	int scale;
	20	int monochrome;
	21	int luminance;
	22	int w, h;
	23
	24	/* Call this instead of exit(), so we can clean up SDL: atexit() is evil. */
	25	static void quit(int rc)
	26	{
	27	SDL_Quit();
	28	exit(rc);
	29	}
	30
	31	/* NOTE: These RGB conversion functions are not intended for speed,
	32	only as examples.
	33	*/
	34
	35	void RGBtoYUV(Uint8 rgb, int yuv, int monochrome, int luminance)
	36	{
	37	if (monochrome)
	38	{
	39	#if 1 /* these are the two formulas that I found on the FourCC site... */
	40	yuv[0] = 0.299rgb[0] + 0.587rgb[1] + 0.114*rgb[2];
	41	yuv[1] = 128;
	42	yuv[2] = 128;
	43	#else
	44	yuv[0] = (0.257 * rgb[0]) + (0.504 * rgb[1]) + (0.098 * rgb[2]) + 16;
	45	yuv[1] = 128;
	46	yuv[2] = 128;
	47	#endif
	48	}
	49	else
	50	{
	51	#if 1 /* these are the two formulas that I found on the FourCC site... */
	52	yuv[0] = 0.299rgb[0] + 0.587rgb[1] + 0.114*rgb[2];
	53	yuv[1] = (rgb[2]-yuv[0])*0.565 + 128;
	54	yuv[2] = (rgb[0]-yuv[0])*0.713 + 128;
	55	#else
	56	yuv[0] = (0.257 * rgb[0]) + (0.504 * rgb[1]) + (0.098 * rgb[2]) + 16;
	57	yuv[1] = 128 - (0.148 * rgb[0]) - (0.291 * rgb[1]) + (0.439 * rgb[2]);
	58	yuv[2] = 128 + (0.439 * rgb[0]) - (0.368 * rgb[1]) - (0.071 * rgb[2]);
	59	#endif
	60	}
	61
	62	if (luminance!=100)
	63	{
	64	yuv[0]=yuv[0]*luminance/100;
65	if (yuv[0]>255)
66	yuv[0]=255;
67	}
68
69	/* clamp values...if you need to, we don't seem to have a need */
70	/*
71	for(i=0;i<3;i++)
72	{
73	if(yuv[i]<0)
74	yuv[i]=0;
75	if(yuv[i]>255)
76	yuv[i]=255;
77	}
78	*/
79	}
80
81	void ConvertRGBtoYV12(SDL_Surface s, SDL_Overlay o, int monochrome, int luminance)
82	{
83	int x,y;
84	int yuv[3];
85	Uint8 p,op[3];
86
87	SDL_LockSurface(s);
88	SDL_LockYUVOverlay(o);
89
90	/* Black initialization */
91	/*
92	memset(o->pixels[0],0,o->pitches[0]*o->h);
93	memset(o->pixels[1],128,o->pitches[1]*((o->h+1)/2));
94	memset(o->pixels[2],128,o->pitches[2]*((o->h+1)/2));
95	*/
96
97	/* Convert */
98	for(y=0; y<s->h && y<o->h; y++)
99	{
100	p=((Uint8 ) s->pixels)+s->pitchy;
101	op[0]=o->pixels[0]+o->pitches[0]*y;
102	op[1]=o->pixels[1]+o->pitches[1]*(y/2);
103	op[2]=o->pixels[2]+o->pitches[2]*(y/2);
104	for(x=0; x<s->w && x<o->w; x++)
105	{
106	RGBtoYUV(p, yuv, monochrome, luminance);
107	*(op[0]++)=yuv[0];
108	if(x%2==0 && y%2==0)
109	{
110	*(op[1]++)=yuv[2];
111	*(op[2]++)=yuv[1];
112	}
113	p+=s->format->BytesPerPixel;
114	}
115	}
116
117	SDL_UnlockYUVOverlay(o);
118	SDL_UnlockSurface(s);
119	}
120
121	void ConvertRGBtoIYUV(SDL_Surface s, SDL_Overlay o, int monochrome, int luminance)
122	{
123	int x,y;
124	int yuv[3];
125	Uint8 p,op[3];
126
127	SDL_LockSurface(s);
128	SDL_LockYUVOverlay(o);
129
130	/* Black initialization */
131	/*
132	memset(o->pixels[0],0,o->pitches[0]*o->h);
133	memset(o->pixels[1],128,o->pitches[1]*((o->h+1)/2));
134	memset(o->pixels[2],128,o->pitches[2]*((o->h+1)/2));
135	*/
136
137	/* Convert */
138	for(y=0; y<s->h && y<o->h; y++)
139	{
140	p=((Uint8 ) s->pixels)+s->pitchy;
141	op[0]=o->pixels[0]+o->pitches[0]*y;
142	op[1]=o->pixels[1]+o->pitches[1]*(y/2);
143	op[2]=o->pixels[2]+o->pitches[2]*(y/2);
144	for(x=0; x<s->w && x<o->w; x++)
145	{
146	RGBtoYUV(p,yuv, monochrome, luminance);
147	*(op[0]++)=yuv[0];
148	if(x%2==0 && y%2==0)
149	{
150	*(op[1]++)=yuv[1];
151	*(op[2]++)=yuv[2];
152	}
153	p+=s->format->BytesPerPixel;
154	}
155	}
156
157	SDL_UnlockYUVOverlay(o);
158	SDL_UnlockSurface(s);
159	}
160
161	void ConvertRGBtoUYVY(SDL_Surface s, SDL_Overlay o, int monochrome, int luminance)
162	{
163	int x,y;
164	int yuv[3];
165	Uint8 p,op;
166
167	SDL_LockSurface(s);
168	SDL_LockYUVOverlay(o);
169
170	for(y=0; y<s->h && y<o->h; y++)
171	{
172	p=((Uint8 ) s->pixels)+s->pitchy;
173	op=o->pixels[0]+o->pitches[0]*y;
174	for(x=0; x<s->w && x<o->w; x++)
175	{
176	RGBtoYUV(p, yuv, monochrome, luminance);
177	if(x%2==0)
178	{
179	*(op++)=yuv[1];
180	*(op++)=yuv[0];
181	*(op++)=yuv[2];
182	}
183	else
184	*(op++)=yuv[0];
185
186	p+=s->format->BytesPerPixel;
187	}
188	}
189
190	SDL_UnlockYUVOverlay(o);
191	SDL_UnlockSurface(s);
192	}
193
194	void ConvertRGBtoYVYU(SDL_Surface s, SDL_Overlay o, int monochrome, int luminance)
195	{
196	int x,y;
197	int yuv[3];
198	Uint8 p,op;
199
200	SDL_LockSurface(s);
201	SDL_LockYUVOverlay(o);
202
203	for(y=0; y<s->h && y<o->h; y++)
204	{
205	p=((Uint8 ) s->pixels)+s->pitchy;
206	op=o->pixels[0]+o->pitches[0]*y;
207	for(x=0; x<s->w && x<o->w; x++)
208	{
209	RGBtoYUV(p,yuv, monochrome, luminance);
210	if(x%2==0)
211	{
212	*(op++)=yuv[0];
213	*(op++)=yuv[2];
214	op[1]=yuv[1];
215	}
216	else
217	{
218	*op=yuv[0];
219	op+=2;
220	}
221
222	p+=s->format->BytesPerPixel;
223	}
224	}
225
226	SDL_UnlockYUVOverlay(o);
227	SDL_UnlockSurface(s);
228	}
229
230	void ConvertRGBtoYUY2(SDL_Surface s, SDL_Overlay o, int monochrome, int luminance)
231	{
232	int x,y;
233	int yuv[3];
234	Uint8 p,op;
235
236	SDL_LockSurface(s);
237	SDL_LockYUVOverlay(o);
238
239	for(y=0; y<s->h && y<o->h; y++)
240	{
241	p=((Uint8 ) s->pixels)+s->pitchy;
242	op=o->pixels[0]+o->pitches[0]*y;
243	for(x=0; x<s->w && x<o->w; x++)
244	{
245	RGBtoYUV(p,yuv, monochrome, luminance);
246	if(x%2==0)
247	{
248	*(op++)=yuv[0];
249	*(op++)=yuv[1];
250	op[1]=yuv[2];
251	}
252	else
253	{
254	*op=yuv[0];
255	op+=2;
256	}
257
258	p+=s->format->BytesPerPixel;
259	}
260	}
261
262	SDL_UnlockYUVOverlay(o);
263	SDL_UnlockSurface(s);
264	}
265
266	void Draw()
267	{
268	SDL_Rect rect;
269	int i;
270	int disp;
271
272	if(!scale)
273	{
274	rect.w=overlay->w;
275	rect.h=overlay->h;
276	for(i=0; i<h-rect.h && i<w-rect.w; i++)
277	{
278	rect.x=i;
279	rect.y=i;
280	SDL_DisplayYUVOverlay(overlay,&rect);
281	}
282	}
283	else
284	{
285	rect.w=overlay->w/2;
286	rect.h=overlay->h/2;
287	rect.x=(w-rect.w)/2;
288	rect.y=(h-rect.h)/2;
289	disp=rect.y-1;
290	for(i=0; i<disp; i++)
291	{
292	rect.w+=2;
293	rect.h+=2;
294	rect.x--;
295	rect.y--;
296	SDL_DisplayYUVOverlay(overlay,&rect);
297	}
298	}
299	printf("Displayed %d times.\n",i);
300	}
301
302	static void PrintUsage(char *argv0)
303	{
304	fprintf(stderr, "Usage: %s [arg] [arg] [arg] ...\n", argv0);
305	fprintf(stderr, "Where 'arg' is one of:\n");
306	fprintf(stderr, " -delay <seconds>\n");
307	fprintf(stderr, " -width <pixels>\n");
308	fprintf(stderr, " -height <pixels>\n");
309	fprintf(stderr, " -bpp <bits>\n");
310	fprintf(stderr, " -format <fmt> (one of the: YV12, IYUV, YUY2, UYVY, YVYU)\n");
311	fprintf(stderr, " -hw\n");
312	fprintf(stderr, " -flip\n");
313	fprintf(stderr, " -scale (test scaling features, from 50%% upto window size)\n");
314	fprintf(stderr, " -mono (use monochromatic RGB2YUV conversion)\n");
315	fprintf(stderr, " -lum <perc> (use luminance correction during RGB2YUV conversion,\n");
316	fprintf(stderr, " from 0%% to unlimited, normal is 100%%)\n");
317	fprintf(stderr, " -help (shows this help)\n");
318	fprintf(stderr, " -fullscreen (test overlay in fullscreen mode)\n");
319	}
320
321	int main(int argc, char **argv)
322	{
323	char *argv0 = argv[0];
324	int flip;
325	int delay;
326	int desired_bpp;
327	Uint32 video_flags, overlay_format;
328	char *bmpfile;
329	#ifdef BENCHMARK_SDL
330	Uint32 then, now;
331	#endif
332	int i;
333
334	/* Set default options and check command-line */
335	flip = 0;
336	scale=0;
337	monochrome=0;
338	luminance=100;
339	delay = 1;
340	w = WINDOW_WIDTH;
341	h = WINDOW_HEIGHT;
342	desired_bpp = 0;
343	video_flags = 0;
344	overlay_format = SDL_YV12_OVERLAY;
345
346	while ( argc > 1 ) {
347	if ( strcmp(argv[1], "-delay") == 0 ) {
348	if ( argv[2] ) {
349	delay = atoi(argv[2]);
350	argv += 2;
351	argc -= 2;
352	} else {
353	fprintf(stderr,
354	"The -delay option requires an argument\n");
355	return(1);
356	}
357	} else
358	if ( strcmp(argv[1], "-width") == 0 ) {
359	if ( argv[2] && ((w = atoi(argv[2])) > 0) ) {
360	argv += 2;
361	argc -= 2;
362	} else {
363	fprintf(stderr,
364	"The -width option requires an argument\n");
365	return(1);
366	}
367	} else
368	if ( strcmp(argv[1], "-height") == 0 ) {
369	if ( argv[2] && ((h = atoi(argv[2])) > 0) ) {
370	argv += 2;
371	argc -= 2;
372	} else {
373	fprintf(stderr,
374	"The -height option requires an argument\n");
375	return(1);
376	}
377	} else
378	if ( strcmp(argv[1], "-bpp") == 0 ) {
379	if ( argv[2] ) {
380	desired_bpp = atoi(argv[2]);
381	argv += 2;
382	argc -= 2;
383	} else {
384	fprintf(stderr,
385	"The -bpp option requires an argument\n");
386	return(1);
387	}
388	} else
389	if ( strcmp(argv[1], "-lum") == 0 ) {
390	if ( argv[2] ) {
391	luminance = atoi(argv[2]);
392	argv += 2;
393	argc -= 2;
394	} else {
395	fprintf(stderr,
396	"The -lum option requires an argument\n");
397	return(1);
398	}
399	} else
400	if ( strcmp(argv[1], "-format") == 0 ) {
401	if ( argv[2] ) {
402	if(!strcmp(argv[2],"YV12"))
403	overlay_format = SDL_YV12_OVERLAY;
404	else if(!strcmp(argv[2],"IYUV"))
405	overlay_format = SDL_IYUV_OVERLAY;
406	else if(!strcmp(argv[2],"YUY2"))
407	overlay_format = SDL_YUY2_OVERLAY;
408	else if(!strcmp(argv[2],"UYVY"))
409	overlay_format = SDL_UYVY_OVERLAY;
410	else if(!strcmp(argv[2],"YVYU"))
411	overlay_format = SDL_YVYU_OVERLAY;
412	else
413	{
414	fprintf(stderr, "The -format option %s is not recognized\n",argv[2]);
415	return(1);
416	}
417	argv += 2;
418	argc -= 2;
419	} else {
420	fprintf(stderr,
421	"The -format option requires an argument\n");
422	return(1);
423	}
424	} else
425	if ( strcmp(argv[1], "-hw") == 0 ) {
426	video_flags \|= SDL_HWSURFACE;
427	argv += 1;
428	argc -= 1;
429	} else
430	if ( strcmp(argv[1], "-flip") == 0 ) {
431	video_flags \|= SDL_DOUBLEBUF;
432	argv += 1;
433	argc -= 1;
434	} else
435	if ( strcmp(argv[1], "-scale") == 0 ) {
436	scale = 1;
437	argv += 1;
438	argc -= 1;
439	} else
440	if ( strcmp(argv[1], "-mono") == 0 ) {
441	monochrome = 1;
442	argv += 1;
443	argc -= 1;
444	} else
445	if (( strcmp(argv[1], "-help") == 0 ) \|\| (strcmp(argv[1], "-h") == 0)) {
446	PrintUsage(argv0);
447	return(1);
448	} else
449	if ( strcmp(argv[1], "-fullscreen") == 0 ) {
450	video_flags \|= SDL_FULLSCREEN;
451	argv += 1;
452	argc -= 1;
453	} else
454	break;
455	}
456	if ( SDL_Init(SDL_INIT_VIDEO) < 0 ) {
457	fprintf(stderr,
458	"Couldn't initialize SDL: %s\n", SDL_GetError());
459	return(1);
460	}
461
462	/* Initialize the display */
463	screen = SDL_SetVideoMode(w, h, desired_bpp, video_flags);
464	if ( screen == NULL ) {
465	fprintf(stderr, "Couldn't set %dx%dx%d video mode: %s\n",
466	w, h, desired_bpp, SDL_GetError());
467	quit(1);
468	}
469	printf("Set%s %dx%dx%d mode\n",
470	screen->flags & SDL_FULLSCREEN ? " fullscreen" : "",
471	screen->w, screen->h, screen->format->BitsPerPixel);
472	printf("(video surface located in %s memory)\n",
473	(screen->flags&SDL_HWSURFACE) ? "video" : "system");
474	if ( screen->flags & SDL_DOUBLEBUF ) {
475	printf("Double-buffering enabled\n");
476	flip = 1;
477	}
478
479	/* Set the window manager title bar */
480	SDL_WM_SetCaption("SDL test overlay", "testoverlay");
481
482	/* Load picture */
483	bmpfile=(argv[1]?argv[1]:"sample.bmp");
484	pic = SDL_LoadBMP(bmpfile);
485	if ( pic == NULL ) {
486	fprintf(stderr, "Couldn't load %s: %s\n", bmpfile,
487	SDL_GetError());
488	quit(1);
489	}
490
491	/* Convert the picture to 32bits, for easy conversion */
492	{
493	SDL_Surface *newsurf;
494	SDL_PixelFormat format;
495
496	format.palette=NULL;
497	format.BitsPerPixel=32;
498	format.BytesPerPixel=4;
499	#if SDL_BYTEORDER == SDL_LIL_ENDIAN
500	format.Rshift=0;
501	format.Gshift=8;
502	format.Bshift=16;
503	#else
504	format.Rshift=24;
505	format.Gshift=16;
506	format.Bshift=8;
507	#endif
508	format.Ashift=0;
509	format.Rmask=0xff<<format.Rshift;
510	format.Gmask=0xff<<format.Gshift;
511	format.Bmask=0xff<<format.Bshift;
512	format.Amask=0;
513	format.Rloss=0;
514	format.Gloss=0;
515	format.Bloss=0;
516	format.Aloss=8;
517	format.colorkey=0;
518	format.alpha=0;
519
520	newsurf=SDL_ConvertSurface(pic, &format, SDL_SWSURFACE);
521	if(!newsurf)
522	{
523	fprintf(stderr, "Couldn't convert picture to 32bits RGB: %s\n",
524	SDL_GetError());
525	quit(1);
526	}
527	SDL_FreeSurface(pic);
528	pic=newsurf;
529	}
530
531	/* Create the overlay */
532	overlay = SDL_CreateYUVOverlay(pic->w, pic->h, overlay_format, screen);
533	if ( overlay == NULL ) {
534	fprintf(stderr, "Couldn't create overlay: %s\n", SDL_GetError());
535	quit(1);
536	}
537	printf("Created %dx%dx%d %s %s overlay\n",overlay->w,overlay->h,overlay->planes,
538	overlay->hw_overlay?"hardware":"software",
539	overlay->format==SDL_YV12_OVERLAY?"YV12":
540	overlay->format==SDL_IYUV_OVERLAY?"IYUV":
541	overlay->format==SDL_YUY2_OVERLAY?"YUY2":
542	overlay->format==SDL_UYVY_OVERLAY?"UYVY":
543	overlay->format==SDL_YVYU_OVERLAY?"YVYU":
544	"Unknown");
545	for(i=0; i<overlay->planes; i++)
546	{
547	printf(" plane %d: pitch=%d\n", i, overlay->pitches[i]);
548	}
549
550	/* Convert to YUV, and draw to the overlay */
551	#ifdef BENCHMARK_SDL
552	then = SDL_GetTicks();
553	#endif
554	switch(overlay->format)
555	{
556	case SDL_YV12_OVERLAY:
557	ConvertRGBtoYV12(pic,overlay,monochrome,luminance);
558	break;
559	case SDL_UYVY_OVERLAY:
560	ConvertRGBtoUYVY(pic,overlay,monochrome,luminance);
561	break;
562	case SDL_YVYU_OVERLAY:
563	ConvertRGBtoYVYU(pic,overlay,monochrome,luminance);
564	break;
565	case SDL_YUY2_OVERLAY:
566	ConvertRGBtoYUY2(pic,overlay,monochrome,luminance);
567	break;
568	case SDL_IYUV_OVERLAY:
569	ConvertRGBtoIYUV(pic,overlay,monochrome,luminance);
570	break;
571	default:
572	printf("cannot convert RGB picture to obtained YUV format!\n");
573	quit(1);
574	break;
575	}
576	#ifdef BENCHMARK_SDL
577	now = SDL_GetTicks();
578	printf("Conversion Time: %d milliseconds\n", now-then);
579	#endif
580
581	/* Do all the drawing work */
582	#ifdef BENCHMARK_SDL
583	then = SDL_GetTicks();
584	#endif
585	Draw();
586	#ifdef BENCHMARK_SDL
587	now = SDL_GetTicks();
588	printf("Time: %d milliseconds\n", now-then);
589	#endif
590	SDL_Delay(delay*1000);
591	SDL_Quit();
592	return(0);
593	}
594