用SDL库播放yuy2 Packed mode

#define SDL_YUY2_OVERLAY 0x32595559 /* Packed mode: Y0+U0+Y1+V0 */

if (SDL_Init(SDL_INIT_VIDEO) < 0)

    {

        exit(1);

    }

    atexit(SDL_Quit);

 

    screen = SDL_SetVideoMode(720, 576, 32, SDL_SWSURFACE|SDL_ANYFORMAT);

    if ( screen == NULL )

 {

         exit(1);

    }

 

    SDL_Overlay* overlay = SDL_CreateYUVOverlay(w, h, SDL_YUY2_OVERLAY, screen);

    if (overlay == NULL)

    {

        exit(1);

    }

 

    pY = (unsigned char*)malloc(w*h*2);

SDL_LockSurface(screen);

        SDL_LockYUVOverlay(overlay);

  

 

    fp = fopen("d:\\6082.dat", "rb");

    if (fp == NULL)

    {

        exit(1);

    }

 while (!feof(fp))

 {  

        fread(pY, 1, w*h*2, fp);

        memcpy(overlay->pixels[0], pY, w*h*2);

        SDL_UnlockYUVOverlay(overlay);

        SDL_UnlockSurface(screen);

  

        rect.w = w;

        rect.h = h;

        rect.x = rect.y = 0;

        SDL_DisplayYUVOverlay(overlay, &rect);

  

        SDL_Delay(40);

  

        i += 1;

    }

  fclose(fp);

    free(pY);

 

    SDL_FreeYUVOverlay(overlay);

    SDL_FreeSurface(screen);

 str.Format(_T("frmcnt:%d"),i);

 MessageBox(str);