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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 3 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, see <http://www.gnu.org/licenses/>.
*
*/
#ifndef BACKENDS_MIXER_ABSTRACT_H
#define BACKENDS_MIXER_ABSTRACT_H
#include "audio/mixer_intern.h"
/**
* Abstract class for mixer manager. Subclasses
* implement the real functionality.
*/
class MixerManager {
public:
MixerManager() : _mixer(0), _audioSuspended(false) {}
virtual ~MixerManager() { delete _mixer; }
/**
* Initialize and setups the mixer
*/
virtual void init() = 0;
/**
* Get the audio mixer implementation
*/
Audio::Mixer *getMixer() { return (Audio::Mixer *)_mixer; }
// Used by LinuxMoto Port
/**
* Pauses the audio system
*/
virtual void suspendAudio() = 0;
/**
* Resumes the audio system
*/
virtual int resumeAudio() = 0;
/**
* Returns true if this is a null device and won't output any audio.
*/
virtual bool isNullDevice() const { return false; }
protected:
/** The mixer implementation */
Audio::MixerImpl *_mixer;
/** State of the audio system */
bool _audioSuspended;
};
#endif
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