1 #include "stdafx.h"

     2 #include "openttd.h"

     3 #include "driver.h"

     4 #include "mixer.h"

     5 #include "sdl.h"

     6 #include "sound/sdl.h"

     7 #include <SDL.h>

     8 

     9 static void CDECL fill_sound_buffer(void *userdata, Uint8 *stream, int len)

    10 {

    11 	MxMixSamples(_mixer, stream, len / 4);

    12 }

    13 

    14 static const char *SdlSoundStart(const char * const *parm)

    15 {

    16 	SDL_AudioSpec spec;

    17 

    18 	const char *s = SdlOpen(SDL_INIT_AUDIO);

    19 	if (s != NULL) return s;

    20 

    21 	spec.freq = GetDriverParamInt(parm, "hz", 11025);

    22 	spec.format = AUDIO_S16SYS;

    23 	spec.channels = 2;

    24 	spec.samples = 512;

    25 	spec.callback = fill_sound_buffer;

    26 	SDL_CALL SDL_OpenAudio(&spec, &spec);

    27 	SDL_CALL SDL_PauseAudio(0);

    28 	return NULL;

    29 }

    30 

    31 static void SdlSoundStop(void)

    32 {

    33 	SDL_CALL SDL_CloseAudio();

    34 	SdlClose(SDL_INIT_AUDIO);

    35 }

    36 

    37 const HalSoundDriver _sdl_sound_driver = {

    38 	SdlSoundStart,

    39 	SdlSoundStop,

    40 };