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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.
*
*/
#ifndef BACKENDS_MIXER_NULLSDL_H
#define BACKENDS_MIXER_NULLSDL_H
#include "backends/mixer/sdl/sdl-mixer.h"
#include "common/str.h"
/** Audio mixer which in fact does not output audio.
*
* It is used by events recorder since the recorder is intentionally
* turning sound off to avoid stuttering.
*
* It returns correct output and shoots callbacks, so all OSystem
* users could work without modifications.
*/
class NullSdlMixerManager : public SdlMixerManager {
public:
NullSdlMixerManager();
virtual ~NullSdlMixerManager();
virtual void init();
void update();
virtual void suspendAudio();
virtual int resumeAudio();
protected:
virtual void startAudio();
virtual void callbackHandler(byte *samples, int len);
private:
uint32 _outputRate;
uint32 _callsCounter;
uint8 _callbackPeriod;
uint32 _samples;
uint8 *_samplesBuf;
};
#endif
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