1 /* $Id$ */

     2 

     3 #include "../stdafx.h"

     4 

     5 #ifdef WITH_SDL

     6 

     7 #include "../openttd.h"

     8 #include "../driver.h"

     9 #include "../mixer.h"

    10 #include "../sdl.h"

    11 #include "sdl_s.h"

    12 #include <SDL.h>

    13 

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

    15 {

    16 	MxMixSamples(stream, len / 4);

    17 }

    18 

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

    20 {

    21 	SDL_AudioSpec spec;

    22 

    23 	const char *s = SdlOpen(SDL_INIT_AUDIO);

    24 	if (s != NULL) return s;

    25 

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

    27 	spec.format = AUDIO_S16SYS;

    28 	spec.channels = 2;

    29 	spec.samples = 512;

    30 	spec.callback = fill_sound_buffer;

    31 	SDL_CALL SDL_OpenAudio(&spec, &spec);

    32 	SDL_CALL SDL_PauseAudio(0);

    33 	return NULL;

    34 }

    35 

    36 static void SdlSoundStop(void)

    37 {

    38 	SDL_CALL SDL_CloseAudio();

    39 	SdlClose(SDL_INIT_AUDIO);

    40 }

    41 

    42 const HalSoundDriver _sdl_sound_driver = {

    43 	SdlSoundStart,

    44 	SdlSoundStop,

    45 };

    46 

    47 #endif