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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 SOUND_AUDIOCD_H
#define SOUND_AUDIOCD_H
#include "common/scummsys.h"
#include "common/singleton.h"
#include "sound/mixer.h"
namespace Audio {
class AudioCDManager : public Common::Singleton<AudioCDManager> {
public:
struct Status {
bool playing;
int track;
int start;
int duration;
int numLoops;
int volume;
int balance;
};
/**
* Start playback of the specified "CD" track. This method mimics
* the interface of OSystem::playCD (which it in fact may call, if an Audio CD is
* present), but also can play digital audio tracks in various formats.
*
* @param track the track to play.
* @param num_loops how often playback should be repeated (-1 = infinitely often).
* @param start_frame the frame at which playback should start (75 frames = 1 second).
* @param duration the number of frames to play (0: play until end)
* @param only_emulate if true, don't try to play from a real CD
*/
void play(int track, int numLoops, int startFrame, int duration, bool only_emulate = false);
void stop();
bool isPlaying() const;
void setVolume(byte volume);
void setBalance(int8 balance);
void updateCD();
Status getStatus() const;
private:
friend class Common::Singleton<SingletonBaseType>;
AudioCDManager();
// FIXME: It might make sense to stop CD playback, when the AudioCDManager singleton
// is destroyed. Currently we can not do this, since in worst case the OSystem and
// along with it the Mixer will be destroyed before the AudioCDManager, thus
// leading to invalid memory access. If we can fix up the code to destroy the
// AudioCDManager before OSystem in *all* cases, that is including calling
// OSystem::quit, we might be able to implement it via a simple "stop()"
// call in a custom destructor of AudioCDManager.
/* used for emulated CD music */
SoundHandle _handle;
bool _emulating;
Status _cd;
Mixer *_mixer;
};
/** Shortcut for accessing the audio CD manager. */
#define AudioCD Audio::AudioCDManager::instance()
} // End of namespace Audio
#endif
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