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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 CDAUDIO_H
#define CDAUDIO_H
#include "common/system.h"
// CD frames are 1/75 sec
#define CD_FPS 75
#define TO_MSECS(frame) ((UInt32)((frame) * 1000 / CD_FPS))
// consider frame at 1/1000 sec
#define FROM_MIN(mins) ((UInt32)((mins) * 60 * 1000))
#define FROM_SEC(secs) ((UInt32)((secs) * 1000))
class CDAudio {
public:
CDAudio() {
_isInitialized = false;
_volumeLevel = 100;
};
virtual bool init() = 0;
virtual void release() = 0;
// OSystem functions
virtual bool poll() = 0;
virtual void play(int track, int num_loops, int start_frame, int duration) = 0;
virtual void stop() = 0;
virtual void update() = 0;
// volume in percent
virtual void setVolume(int volume) { _volumeLevel = volume; }
virtual int getVolume() const { return _volumeLevel; }
virtual void upVolume(int value) {}
virtual void downVolume(int value) {}
protected:
int _volumeLevel;
bool _isInitialized;
};
#endif
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