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