Embedding smpeg screen in an SDL screen

SDL Development
1

hi all,

I’m seeking advice and/or code examples of how to embed an SMPEG
screen within a larger SDL screen. All SMPEG examples I’ve seen
have the SMPEG screen being the entire window.

I’m aiming to have a full-screen display, which includes one
inset rectangle with an mpeg moving being played.

I’ve got the movie playing. I’ve got the full screen. I just
can’t position the smpeg region within context of the broader
window.

Many thanks in advance!

regards

2

Just make a new surface, and point SMPEG to it, rather than to your
window’s surface.

I did this when I was working on VidSlide (unfinished title :^/ ).

It allowed me to turn a video file into a puzzle. :slight_smile:

-bill!On Fri, May 24, 2002 at 10:34:00PM +1000, Richard Keech wrote:

hi all,

I’m seeking advice and/or code examples of how to embed an SMPEG
screen within a larger SDL screen. All SMPEG examples I’ve seen
have the SMPEG screen being the entire window.

3

thanks Bill,

Yes, but how to position the inset surface within the main
surface?On Sat, 2002-05-25 at 03:56, nbs wrote:

On Fri, May 24, 2002 at 10:34:00PM +1000, Richard Keech wrote:

hi all,

I’m seeking advice and/or code examples of how to embed an SMPEG
screen within a larger SDL screen. All SMPEG examples I’ve seen
have the SMPEG screen being the entire window.

Just make a new surface, and point SMPEG to it, rather than to your
window’s surface.

I did this when I was working on VidSlide (unfinished title :^/ ).

It allowed me to turn a video file into a puzzle. :slight_smile:

4

I was simply SDL_BlitSurface()'ing it each frame (or, rather, each
frame I cared about… eg, if the movie is 60fps but I only cared about
the game being 30fps, I just blit every 30th of a second)

-bill!On Sat, May 25, 2002 at 06:30:19AM +1000, Richard Keech wrote:

thanks Bill,

Yes, but how to position the inset surface within the main
surface?

5

thanks Bill,

Yes, but how to position the inset surface within the main
surface?

Use SMPEG_move(), see smpeg.h for the prototype.

See ya,
-Sam Lantinga, Software Engineer, Blizzard Entertainment

6

At 06:30 AM 5/25/2002 +1000, you wrote:

thanks Bill,

Yes, but how to position the inset surface within the main
surface?

I did this with a SDL_Rect, you just blit the smpeg surface onto your main
surface .

     if(SDL_mutexP(smpeg_holder_lock) == -1) return 0;

     if (top)

SDL_BlitSurface(sdl_smpeg_holder,NULL,sdl_screen,&Screen_smpeg_Target);
else
SDL_BlitSurface(sdl_smpeg_holder,NULL,sdl_screen,&Screen_smpeg_Target_bottom);

     if(SDL_mutexV(smpeg_holder_lock) == -1) return -1;

you use a mutex to keep the threads happy

also for the initialization i did this

     sdl_smpeg_target =

SDL_CreateRGBSurface(SDL_SWSURFACE,100,100,16,63488,2016,31,0);
//created as a software surface to avoid a
potential crash
SDL_DisplayFormat(sdl_smpeg_target);

     sdl_smpeg_holder =

SDL_CreateRGBSurface(SDL_SWSURFACE,100,100,16,63488,2016,31,0);
SDL_DisplayFormat(sdl_smpeg_holder);

     mpeg = SMPEG_new("c:\\tmp\\random2.mpeg",&info,1);

     SMPEG_enableaudio(mpeg, 1);
     SMPEG_enablevideo(mpeg, 1);
     SMPEG_setvolume(mpeg, 100);

     smpeg_mutex_lock = SDL_CreateMutex();// keep threads happy
     smpeg_holder_lock = SDL_CreateMutex();
     SMPEG_setdisplay(mpeg,sdl_smpeg_target ,NULL/*

smpeg_mutex_lock*/, update_smpeg);
SMPEG_scaleXY(mpeg, sdl_smpeg_target->w, sdl_smpeg_target->h);
SMPEG_loop(mpeg, 1);
SMPEG_play(mpeg);

Shane>On Sat, 2002-05-25 at 03:56, nbs wrote:

On Fri, May 24, 2002 at 10:34:00PM +1000, Richard Keech wrote:

hi all,

I’m seeking advice and/or code examples of how to embed an SMPEG
screen within a larger SDL screen. All SMPEG examples I’ve seen
have the SMPEG screen being the entire window.

Just make a new surface, and point SMPEG to it, rather than to your
window’s surface.

I did this when I was working on VidSlide (unfinished title :^/ ).

It allowed me to turn a video file into a puzzle. :slight_smile:

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