threadwin.c
资源名称:NETVIDEO.rar [点击查看]
上传用户:sun1608
上传日期:2007-02-02
资源大小:6116k
文件大小:8k
源码类别:
流媒体/Mpeg4/MP4
开发平台:
Visual C++
- /* Test out the multi-threaded event handling functions */
- #include <stdlib.h>
- #include <stdio.h>
- #include <string.h>
- #include "SDL.h"
- #include "SDL_thread.h"
- /* Are we done yet? */
- static int done = 0;
- /* Is the cursor visible? */
- static int visible = 1;
- SDL_Surface *LoadIconSurface(char *file, Uint8 **maskp)
- {
- SDL_Surface *icon;
- Uint8 *pixels;
- Uint8 *mask;
- int mlen, i;
- *maskp = NULL;
- /* Load the icon surface */
- icon = SDL_LoadBMP(file);
- if ( icon == NULL ) {
- fprintf(stderr, "Couldn't load %s: %sn", file, SDL_GetError());
- return(NULL);
- }
- /* Check width and height */
- if ( (icon->w%8) != 0 ) {
- fprintf(stderr, "Icon width must be a multiple of 8!n");
- SDL_FreeSurface(icon);
- return(NULL);
- }
- if ( icon->format->palette == NULL ) {
- fprintf(stderr, "Icon must have a palette!n");
- SDL_FreeSurface(icon);
- return(NULL);
- }
- /* Set the colorkey */
- SDL_SetColorKey(icon, SDL_SRCCOLORKEY, *((Uint8 *)icon->pixels));
- /* Create the mask */
- pixels = (Uint8 *)icon->pixels;
- printf("Transparent pixel: (%d,%d,%d)n",
- icon->format->palette->colors[*pixels].r,
- icon->format->palette->colors[*pixels].g,
- icon->format->palette->colors[*pixels].b);
- mlen = icon->w*icon->h;
- mask = (Uint8 *)malloc(mlen/8);
- if ( mask == NULL ) {
- fprintf(stderr, "Out of memory!n");
- SDL_FreeSurface(icon);
- return(NULL);
- }
- memset(mask, 0, mlen/8);
- for ( i=0; i<mlen; ) {
- if ( pixels[i] != *pixels )
- mask[i/8] |= 0x01;
- ++i;
- if ( (i%8) != 0 )
- mask[i/8] <<= 1;
- }
- *maskp = mask;
- return(icon);
- }
- int FilterEvents(const SDL_Event *event)
- {
- static int reallyquit = 0;
- switch (event->type) {
- case SDL_ACTIVEEVENT:
- /* See what happened */
- printf("App %s ",
- event->active.gain ? "gained" : "lost");
- if ( event->active.state & SDL_APPACTIVE )
- printf("active ");
- if ( event->active.state & SDL_APPMOUSEFOCUS )
- printf("mouse ");
- if ( event->active.state & SDL_APPINPUTFOCUS )
- printf("input ");
- printf("focusn");
- /* See if we are iconified or restored */
- if ( event->active.state & SDL_APPACTIVE ) {
- printf("App has been %sn",
- event->active.gain ?
- "restored" : "iconified");
- }
- return(0);
- /* This is important! Queue it if we want to quit. */
- case SDL_QUIT:
- if ( ! reallyquit ) {
- reallyquit = 1;
- printf("Quit requestedn");
- return(0);
- }
- printf("Quit demandedn");
- return(1);
- /* Mouse and keyboard events go to threads */
- case SDL_MOUSEMOTION:
- case SDL_MOUSEBUTTONDOWN:
- case SDL_MOUSEBUTTONUP:
- case SDL_KEYDOWN:
- case SDL_KEYUP:
- return(1);
- /* Drop all other events */
- default:
- return(0);
- }
- }
- int HandleMouse(void *unused)
- {
- SDL_Event events[10];
- int i, found;
- Uint32 mask;
- /* Handle mouse events here */
- mask = (SDL_MOUSEMOTIONMASK|SDL_MOUSEBUTTONDOWNMASK|SDL_MOUSEBUTTONUPMASK);
- while ( ! done ) {
- found = SDL_PeepEvents(events, 10, SDL_GETEVENT, mask);
- for ( i=0; i<found; ++i ) {
- switch(events[i].type) {
- /* We want to toggle visibility on buttonpress */
- case SDL_MOUSEBUTTONDOWN:
- case SDL_MOUSEBUTTONUP:
- if ( events[i].button.state == SDL_PRESSED ) {
- visible = !visible;
- SDL_ShowCursor(visible);
- }
- printf("Mouse button %d has been %sn",
- events[i].button.button,
- (events[i].button.state == SDL_PRESSED) ?
- "pressed" : "released");
- break;
- /* Show relative mouse motion */
- case SDL_MOUSEMOTION:
- printf("Mouse relative motion: {%d,%d}n",
- events[i].motion.xrel, events[i].motion.yrel);
- break;
- }
- }
- /* Give up some CPU to allow events to arrive */
- SDL_Delay(20);
- }
- return(0);
- }
- int HandleKeyboard(void *unused)
- {
- SDL_Event events[10];
- int i, found;
- Uint32 mask;
- /* Handle mouse events here */
- mask = (SDL_KEYDOWNMASK|SDL_KEYUPMASK);
- while ( ! done ) {
- found = SDL_PeepEvents(events, 10, SDL_GETEVENT, mask);
- for ( i=0; i<found; ++i ) {
- switch(events[i].type) {
- /* We want to toggle visibility on buttonpress */
- case SDL_KEYDOWN:
- case SDL_KEYUP:
- /* Allow hitting <ESC> to quit the app */
- if ( events[i].key.keysym.sym == SDLK_ESCAPE ) {
- done = 1;
- }
- printf("Key '%c' has been %sn",
- events[i].key.keysym.unicode,
- (events[i].key.state == SDL_PRESSED) ?
- "pressed" : "released");
- break;
- }
- }
- /* Give up some CPU to allow events to arrive */
- SDL_Delay(20);
- }
- return(0);
- }
- int main(int argc, char *argv[])
- {
- SDL_Surface *screen;
- SDL_Surface *icon;
- Uint8 *icon_mask;
- int i, parsed;
- Uint8 *buffer;
- SDL_Color palette[256];
- Uint32 init_flags;
- Uint8 video_bpp;
- Uint32 video_flags;
- SDL_Thread *mouse_thread;
- SDL_Thread *keybd_thread;
- /* Set the options, based on command line arguments */
- init_flags = SDL_INIT_VIDEO;
- video_bpp = 8;
- video_flags = SDL_SWSURFACE;
- parsed = 1;
- while ( parsed ) {
- /* If the threaded option is enabled, and the SDL library hasn't
- been compiled with threaded events enabled, then the mouse and
- keyboard won't respond.
- */
- if ( (argc >= 2) && (strcmp(argv[1], "-threaded") == 0) ) {
- init_flags |= SDL_INIT_EVENTTHREAD;
- argc -= 1;
- argv += 1;
- printf("Running with threaded eventsn");
- } else
- if ( (argc >= 2) && (strcmp(argv[1], "-fullscreen") == 0) ) {
- video_flags |= SDL_FULLSCREEN;
- argc -= 1;
- argv += 1;
- } else
- if ( (argc >= 3) && (strcmp(argv[1], "-bpp") == 0) ) {
- video_bpp = atoi(argv[2]);
- argc -= 2;
- argv += 2;
- } else {
- parsed = 0;
- }
- }
- /* Initialize SDL with the requested flags */
- if ( SDL_Init(init_flags) < 0 ) {
- fprintf(stderr,
- "Couldn't initialize SDL: %sn", SDL_GetError());
- exit(1);
- }
- atexit(SDL_Quit);
- /* Set the icon -- this must be done before the first mode set */
- icon = LoadIconSurface("icon.bmp", &icon_mask);
- if ( icon != NULL ) {
- SDL_WM_SetIcon(icon, icon_mask);
- }
- if ( icon_mask != NULL )
- free(icon_mask);
- /* Initialize the display */
- screen = SDL_SetVideoMode(640, 480, video_bpp, video_flags);
- if ( screen == NULL ) {
- fprintf(stderr, "Couldn't set 640x480x%d video mode: %sn",
- video_bpp, SDL_GetError());
- exit(1);
- }
- printf("Running in %s moden", screen->flags & SDL_FULLSCREEN ?
- "fullscreen" : "windowed");
- /* Enable printable characters */
- SDL_EnableUNICODE(1);
- /* Set an event filter that discards everything but QUIT */
- SDL_SetEventFilter(FilterEvents);
- /* Create the event handling threads */
- mouse_thread = SDL_CreateThread(HandleMouse, NULL);
- keybd_thread = SDL_CreateThread(HandleKeyboard, NULL);
- /* Set the surface pixels and refresh! */
- for ( i=0; i<256; ++i ) {
- palette[i].r = 255-i;
- palette[i].g = 255-i;
- palette[i].b = 255-i;
- }
- SDL_SetColors(screen, palette, 0, 256);
- if ( SDL_LockSurface(screen) < 0 ) {
- fprintf(stderr, "Couldn't lock display surface: %sn",
- SDL_GetError());
- exit(2);
- }
- buffer = (Uint8 *)screen->pixels;
- for ( i=0; i<screen->h; ++i ) {
- memset(buffer,(i*255)/screen->h,
- screen->w*screen->format->BytesPerPixel);
- buffer += screen->pitch;
- }
- SDL_UnlockSurface(screen);
- SDL_UpdateRect(screen, 0, 0, 0, 0);
- /* Loop, waiting for QUIT */
- while ( ! done ) {
- if ( ! (init_flags & SDL_INIT_EVENTTHREAD) ) {
- SDL_PumpEvents(); /* Needed when event thread is off */
- }
- if ( SDL_PeepEvents(NULL, 0, SDL_PEEKEVENT, SDL_QUITMASK) ) {
- done = 1;
- }
- /* Give up some CPU so the events can accumulate */
- SDL_Delay(20);
- }
- SDL_WaitThread(mouse_thread, NULL);
- SDL_WaitThread(keybd_thread, NULL);
- return(0);
- }