SDL Resources

[zenogais]

Does anyone know any good online resources for information about SDL(Simple DirectMedia Layer). Any good sites with lots of info on it would be really helpful.

Thanks in advance,
zenogais

[Kraelis]

The main site is as best as you can go... so far... I think they have some links to *some* good sites. I learned SDL on my own from there. I can even do OpenGL integration too!

[zenogais]

Thanks for the info, if you can learn all that you have from there then I have faith I should be able to get what I need. Thanks much!!

[RamsusX]

I use the Library reference documentation. It should be all you really need once you've learned the basics of SDL programming from a few tutorials.

[zenogais]

If you guys wouldn't mind can you help me with a problem. How come when I use SDL_CDPlayTracks() to play an Audio CD I can't hear anything?

[RamsusX]

Can you hear CD audio when you use the Windows CD Player program to play an audio CD? If not, check your mixer settings. Otherwise, try posting the relevant code from your program.

[zenogais]

I get an invalid starting track when I run the program, here is the relevent code. Also, I can hear the audio when I play the CD with WinAmp, whats going on?:

if(SDL_CDPlayTracks(cdrom, 0, 0, 0, 0) < 0) {
			printf("Couldn't Play CD Audio Tracks: %s\n", SDL_GetError());
			return;
	}

[RamsusX]

Do you have multiple CD/DVD Drives? You may be opening the wrong one. Use SDL_CDNumDrives() to find out how many drives SDL detects.

EDIT: Also, from the documentation:

SDL_CDPlayTracks should only be called after calling SDL_CDStatus to get track information about the CD.

Sounds like you need to first make a call to SDL_CDStatus. See the documentation for information on how to use it.

[zenogais]

I took the code stragiht from the documents, so I did call if(CD_INDRIVE(SDL_CDStatus(cdrom)) ). The problem is the light on my CD-ROM drive just keeps on flashing and nothing seems to happen. I'm not sure whats going on, here's the entire source:

void SDLPlayCD() {
	if(SDL_WasInit(SDL_INIT_CDROM) == 0) {
		printf("Initializing CD-ROM Drive.\n");
		if(SDL_InitSubSystem(SDL_INIT_CDROM) < 0)
			printf("Failed to Initialize CD-Rom: %s\n", SDL_GetError());
	}


	if(SDL_CDNumDrives() == 0) {
		printf("Fatal Error: No CD-ROM Drives!\n");
		return;
	}

	int numdrive = SDL_CDNumDrives();
	printf("Num CD Drives: %d\n", numdrive);
	printf("CD0 %s\n", SDL_CDName(0));
	printf("CD1 %s\n", SDL_CDName(1));

	cdrom = SDL_CDOpen(0);
	if(cdrom == NULL) {
		printf("Error: Unable to Open Access to CD-ROM Drive %s: %s\n", SDL_CDName(0), SDL_GetError());
		return;
	}

	if(SDL_CDStatus(cdrom) > 0) {
		printf("Playing CD\n");
		if(SDL_CDPlayTracks(cdrom, 0, 0, 0, 0) < 0) {
				printf("Couldn't Play CD Audio Tracks: %s\n", SDL_GetError());
				return;
		} else {
			printf("CD is playing\n");
		}
	} else {
		printf("CD Error: %s\n", SDL_GetError());
	}
}

[RamsusX]

Did you initialize the audio subsystem?

[zenogais]

Yes, I initialized it with SDL_INIT

[RamsusX]

Sounds like it could be a bug in SDL. Have some friends test the program out on their computers.