tron@2186: /* $Id$ */
tron@2186: 
tron@2189: #include "../stdafx.h"
tron@2189: 
tron@2189: #ifdef WITH_SDL
tron@2189: 
tron@2189: #include "../openttd.h"
tron@2189: #include "../driver.h"
tron@2189: #include "../mixer.h"
tron@2189: #include "../sdl.h"
tron@2189: #include "sdl_s.h"
tron@2174: #include <SDL.h>
tron@2174: 
tron@2174: static void CDECL fill_sound_buffer(void *userdata, Uint8 *stream, int len)
tron@2174: {
tron@2977: 	MxMixSamples(stream, len / 4);
tron@2174: }
tron@2174: 
tron@2174: static const char *SdlSoundStart(const char * const *parm)
tron@2174: {
tron@2174: 	SDL_AudioSpec spec;
tron@2174: 
tron@2174: 	const char *s = SdlOpen(SDL_INIT_AUDIO);
tron@2174: 	if (s != NULL) return s;
tron@2174: 
tron@2174: 	spec.freq = GetDriverParamInt(parm, "hz", 11025);
tron@2174: 	spec.format = AUDIO_S16SYS;
tron@2174: 	spec.channels = 2;
tron@2174: 	spec.samples = 512;
tron@2174: 	spec.callback = fill_sound_buffer;
tron@2174: 	SDL_CALL SDL_OpenAudio(&spec, &spec);
tron@2174: 	SDL_CALL SDL_PauseAudio(0);
tron@2174: 	return NULL;
tron@2174: }
tron@2174: 
tron@2174: static void SdlSoundStop(void)
tron@2174: {
tron@2174: 	SDL_CALL SDL_CloseAudio();
tron@2174: 	SdlClose(SDL_INIT_AUDIO);
tron@2174: }
tron@2174: 
tron@2174: const HalSoundDriver _sdl_sound_driver = {
tron@2174: 	SdlSoundStart,
tron@2174: 	SdlSoundStop,
tron@2174: };
tron@2189: 
tron@2189: #endif