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A small C source: Demonstrates Bug 640

Bug640Demo.c (text/x-c++src), 3.45 KB, created by Ron Howe on 2009-06-20 08:25:35 UTC

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Description:

Filename:

MIME Type:

Creator: Ron Howe

Created: 2009-06-20 08:25:35 UTC

Size: 3.45 KB

patch

obsolete

>/*******************************************************************************
>#	 	sdlbug: Sdl video bug grabber				       #
>#.                                                                             #
># a cutdown of luvcview by Michael Xhaard to isolate a suspected bug in SDL    #
>#                          by Ron Howe  drdhowe@gmail.com                      #
>#									       #
>*******************************************************************************/
>#include <stdio.h>
>#include <stdlib.h>
>#include <string.h>
>#include <SDL/SDL.h>
>#include <SDL/SDL_thread.h>
>#include <errno.h>
>#include <SDL/SDL_syswm.h>
>
>typedef enum action_gui {
>    A_VIDEO,
>    A_QUIT,
>    A_LAST
>} action_gui;
>
>struct pt_data {
>    SDL_Surface **ptscreen;
>    SDL_Event *ptsdlevent;
>    SDL_Rect *drect;
>    int quit;
>} ptdata;
>
>static int eventThread(void *data);
>
>static Uint32 SDL_VIDEO_Flags = SDL_ANYFORMAT | SDL_DOUBLEBUF | SDL_RESIZABLE;
>
>void rndcpy(unsigned char * dst, int pix, int width, int height) {
>    unsigned char *id = dst;
>    int sz = (width * height); 
>    int i;
>    for (i=0; i<sz; i++) {
>        if (i < pix)  *id++ = 128;        
>	else 		*id++ = i % 128;	
>	*id++ = 20; 	        
>    }
>}    
>	    
>int main(int argc, char *argv[]) {
>    const SDL_VideoInfo *info;
>    SDL_Surface *pscreen;
>    SDL_Overlay *overlay;
>    SDL_Rect drect;
>    SDL_Event sdlevent;
>    SDL_Thread *mythread;
>    int status;
>    unsigned char *pimg = NULL;
>    int sdl_format =  SDL_YUY2_OVERLAY;
>    int i = 0;
>    int framewidth = 480;
>    int frameheight = 640;
>    if (SDL_Init(SDL_INIT_VIDEO) < 0) {
>	fprintf(stderr, "Couldn't initialize SDL: %s\n", SDL_GetError());
>	exit(1);
>    }
>    pscreen = SDL_SetVideoMode(framewidth, frameheight + 32, 0, SDL_VIDEO_Flags);
>    overlay = SDL_CreateYUVOverlay(framewidth, frameheight + 32, sdl_format, pscreen);
>    pimg = (unsigned char *) overlay->pixels[0];
>    drect.x = 0;		drect.y = 0;
>    drect.w = pscreen->w;	drect.h = pscreen->h;
>    ptdata.ptscreen = &pscreen;
>    ptdata.ptsdlevent = &sdlevent;
>    ptdata.drect = &drect;
>    ptdata.quit = 1;
>    mythread = SDL_CreateThread(eventThread, (void *) &ptdata);
>    while (ptdata.quit) {
>	    rndcpy(pimg, i, framewidth, frameheight);
>	i += 649;
>	i %= framewidth*frameheight;
>        SDL_DisplayYUVOverlay(overlay, &drect);
>	SDL_Delay(5);
>    }
>    SDL_WaitThread(mythread, &status);
>    SDL_Quit();
>}
>
>action_gui GUI_whichbutton(int x, int y, SDL_Surface * pscreen) {
>    if (y + 32 < pscreen->h) return (A_VIDEO);
>    return  A_QUIT;	
>}
>
>static int eventThread(void *data) {
>    struct pt_data *gdata = (struct pt_data *) data;
>    SDL_Surface *pscreen = *gdata->ptscreen;
>    SDL_Event *sdlevent = gdata->ptsdlevent;
>    SDL_Rect *drect = gdata->drect;
>    int x, y;
>    int mouseon = 0;
>    action_gui curr_action = A_QUIT;
>    while (gdata->quit) {
>	while (SDL_PollEvent(sdlevent)) {	//scan the event queue
>	    switch (sdlevent->type) {
>		case SDL_KEYUP:
>		case SDL_MOUSEBUTTONUP:
>		    mouseon = 0;
>		    break;
>		case SDL_MOUSEBUTTONDOWN:
>		    mouseon = 1;
>		case SDL_MOUSEMOTION:
>		    SDL_GetMouseState(&x, &y);
>		    curr_action = GUI_whichbutton(x, y, pscreen);
>		    break;
>		case SDL_KEYDOWN:
>		    break;
>		case SDL_QUIT:
>		    printf("eventThread: Quit signal received.\n");
>		    gdata->quit = 0;
>		    break;
>	    }
>	}			//end while poll
>	if (mouseon) 
>	    switch (curr_action) {
>		case A_QUIT:  
>		    gdata->quit = 0;
>		    break;
>		default:
>		    break;
>	    }
>	SDL_Delay(50);
>    }				// end eventThread main loop
>}

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Attachments on bug 640: 332

We are currently migrating Bugzilla to GitHub issues.Any changes made to the bug tracker now will be lost, so please do not post new bugs or make changes to them.When we're done, all bug URLs will redirect to their equivalent location on the new bug tracker.

We are currently migrating Bugzilla to GitHub issues.
Any changes made to the bug tracker now will be lost, so please do not post new bugs or make changes to them.
When we're done, all bug URLs will redirect to their equivalent location on the new bug tracker.