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/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
* $URL$
* $Id$
*
*/
#ifndef BACKENDS_SDL_SUBSYS_AUDIO_H
#define BACKENDS_SDL_SUBSYS_AUDIO_H
#include "backends/base-subsys-audio.h"
#if defined(__SYMBIAN32__)
#include <esdl\SDL.h>
#else
#include <SDL.h>
#endif
#if defined(MACOSX)
// On Mac OS X, we need to double buffer the audio buffer, else anything
// which produces sampled data with high latency (like the MT-32 emulator)
// will sound terribly.
// This could be enabled for more / most ports in the future, but needs some
// testing.
#define MIXER_DOUBLE_BUFFERING 1
#endif
namespace Audio {
class MixerImpl;
}
class SdlSubSys_Audio : public BaseSubSys_Audio {
public:
SdlSubSys_Audio();
~SdlSubSys_Audio();
virtual void audioInit();
virtual void audioDone();
bool hasFeature(Feature f);
void setFeatureState(Feature f, bool enable);
bool getFeatureState(Feature f);
// Set function that generates samples
virtual void setupMixer();
static void mixCallback(void *s, byte *samples, int len);
virtual void closeMixer();
virtual Audio::Mixer *getMixer();
virtual bool openCD(int drive);
// Poll CD status
// Returns true if cd audio is playing
bool pollCD();
// Play CD audio track
void playCD(int track, int num_loops, int start_frame, int duration);
// Stop CD audio track
void stopCD();
// Update CD audio status
void updateCD();
protected:
bool _inited;
SDL_AudioSpec _obtainedRate;
// CD Audio
SDL_CD *_cdrom;
int _cdTrack, _cdNumLoops, _cdStartFrame, _cdDuration;
uint32 _cdEndTime, _cdStopTime;
#ifdef MIXER_DOUBLE_BUFFERING
SDL_mutex *_soundMutex;
SDL_cond *_soundCond;
SDL_Thread *_soundThread;
bool _soundThreadIsRunning;
bool _soundThreadShouldQuit;
byte _activeSoundBuf;
uint _soundBufSize;
byte *_soundBuffers[2];
void mixerProducerThread();
static int SDLCALL mixerProducerThreadEntry(void *arg);
void initThreadedMixer(Audio::MixerImpl *mixer, uint bufSize);
void deinitThreadedMixer();
#endif
Audio::MixerImpl *_mixer;
};
#endif
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