sdl_s.cpp

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00001 /* $Id: sdl_s.cpp 16804 2009-07-13 10:16:50Z rubidium $ */
00002 
00005 #ifdef WITH_SDL
00006 
00007 #include "../stdafx.h"
00008 
00009 #include "../mixer.h"
00010 #include "../sdl.h"
00011 #include "sdl_s.h"
00012 #include <SDL.h>
00013 
00014 static FSoundDriver_SDL iFSoundDriver_SDL;
00015 
00016 static void CDECL fill_sound_buffer(void *userdata, Uint8 *stream, int len)
00017 {
00018   MxMixSamples(stream, len / 4);
00019 }
00020 
00021 const char *SoundDriver_SDL::Start(const char * const *parm)
00022 {
00023   SDL_AudioSpec spec;
00024 
00025   const char *s = SdlOpen(SDL_INIT_AUDIO);
00026   if (s != NULL) return s;
00027 
00028   spec.freq = GetDriverParamInt(parm, "hz", 11025);
00029   spec.format = AUDIO_S16SYS;
00030   spec.channels = 2;
00031   spec.samples = 512;
00032   spec.callback = fill_sound_buffer;
00033   MxInitialize(spec.freq);
00034   SDL_CALL SDL_OpenAudio(&spec, &spec);
00035   SDL_CALL SDL_PauseAudio(0);
00036   return NULL;
00037 }
00038 
00039 void SoundDriver_SDL::Stop()
00040 {
00041   SDL_CALL SDL_CloseAudio();
00042   SdlClose(SDL_INIT_AUDIO);
00043 }
00044 
00045 #endif /* WITH_SDL */

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