sdl_s.cpp

00001 /* $Id: sdl_s.cpp 10444 2007-07-05 12:23:54Z peter1138 $ */
00002 
00003 #ifdef WITH_SDL
00004 
00005 #include "../stdafx.h"
00006 
00007 #include "../driver.h"
00008 #include "../mixer.h"
00009 #include "../sdl.h"
00010 #include "sdl_s.h"
00011 #include <SDL.h>
00012 
00013 static FSoundDriver_SDL iFSoundDriver_SDL;
00014 
00015 static void CDECL fill_sound_buffer(void *userdata, Uint8 *stream, int len)
00016 {
00017   MxMixSamples(stream, len / 4);
00018 }
00019 
00020 const char *SoundDriver_SDL::Start(const char * const *parm)
00021 {
00022   SDL_AudioSpec spec;
00023 
00024   const char *s = SdlOpen(SDL_INIT_AUDIO);
00025   if (s != NULL) return s;
00026 
00027   spec.freq = GetDriverParamInt(parm, "hz", 11025);
00028   spec.format = AUDIO_S16SYS;
00029   spec.channels = 2;
00030   spec.samples = 512;
00031   spec.callback = fill_sound_buffer;
00032   SDL_CALL SDL_OpenAudio(&spec, &spec);
00033   SDL_CALL SDL_PauseAudio(0);
00034   return NULL;
00035 }
00036 
00037 void SoundDriver_SDL::Stop()
00038 {
00039   SDL_CALL SDL_CloseAudio();
00040   SdlClose(SDL_INIT_AUDIO);
00041 }
00042 
00043 #endif /* WITH_SDL */

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