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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/>.
*
*/
#include "backends/mixer/null/null-mixer.h"
#include "common/savefile.h"
NullMixerManager::NullMixerManager() : MixerManager() {
_outputRate = 22050;
_callsCounter = 0;
_samples = 8192;
while (_samples * 16 > _outputRate * 2)
_samples >>= 1;
_samplesBuf = new uint8[_samples * 4];
}
NullMixerManager::~NullMixerManager() {
delete[] _samplesBuf;
}
void NullMixerManager::init() {
_mixer = new Audio::MixerImpl(_outputRate, true, _samples);
assert(_mixer);
_mixer->setReady(true);
}
void NullMixerManager::suspendAudio() {
_audioSuspended = true;
}
int NullMixerManager::resumeAudio() {
if (!_audioSuspended) {
return -2;
}
_audioSuspended = false;
return 0;
}
bool NullMixerManager::isNullDevice() const {
return true;
}
void NullMixerManager::update(uint8 callbackPeriod) {
if (_audioSuspended) {
return;
}
_callsCounter++;
if ((_callsCounter % callbackPeriod) == 0) {
assert(_mixer);
_mixer->mixCallback(_samplesBuf, _samples);
}
}
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