shithub: qk1

ref: e87abf9ce8f370d262cba430020d2c0a4c5b774e
dir: /unix/snd_sdl.c/

#include "quakedef.h"
#include <SDL.h>

static SDL_AudioDeviceID adev;

long
sndqueued(void)
{
	return SDL_GetQueuedAudioSize(adev);
}

void
sndstop(void)
{
	if(adev == 0)
		return;
	SDL_ClearQueuedAudio(adev);
	SDL_PauseAudioDevice(adev, 1);
}

void
sndwrite(uchar *buf, long sz)
{
	if(adev == 0)
		return;
	if(SDL_QueueAudio(adev, buf, sz) == 0)
		SDL_PauseAudioDevice(adev, 0);
	else{
		Con_Printf("sndwrite: %s\n", SDL_GetError());
		sndclose();
	}
}

void
sndclose(void)
{
	if(adev == 0)
		return;
	SDL_CloseAudioDevice(adev);
	SDL_QuitSubSystem(SDL_INIT_AUDIO);
	adev = 0;
}

int
sndopen(void)
{
	SDL_AudioSpec got, want = {
		.freq = 44100,
		.format = AUDIO_S16LSB,
		.channels = 2,
		.samples = 441,
		0,
	};

	if(SDL_InitSubSystem(SDL_INIT_AUDIO) != 0){
err:
		Con_Printf("sndopen: %s\n", SDL_GetError());
		return -1;
	}
	if((adev = SDL_OpenAudioDevice(nil, 0, &want, &got, SDL_AUDIO_ALLOW_SAMPLES_CHANGE)) == 0){
		SDL_QuitSubSystem(SDL_INIT_AUDIO);
		goto err;
	}
	return 0;
}