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56 lines
1.6 KiB
C++
56 lines
1.6 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#ifndef BACKENDS_MIXER_NULL_H
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#define BACKENDS_MIXER_NULL_H
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#include "backends/mixer/mixer.h"
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/** Audio mixer which in fact does not output audio.
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*
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* It is used by events recorder since the recorder is intentionally
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* turning sound off to avoid stuttering.
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*
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* It returns correct output and shoots callbacks, so all OSystem
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* users could work without modifications.
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*/
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class NullMixerManager : public MixerManager {
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public:
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NullMixerManager();
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virtual ~NullMixerManager();
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void init() override;
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void update(uint8 callbackPeriod = 10);
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void suspendAudio() override;
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int resumeAudio() override;
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bool isNullDevice() const override;
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private:
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uint32 _outputRate;
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uint32 _callsCounter;
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uint32 _samples;
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uint8 *_samplesBuf;
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};
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#endif
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