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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.
*
*/
#include "backends/mixer/nullmixer/nullsdl-mixer.h"
#include "common/savefile.h"
NullSdlMixerManager::NullSdlMixerManager() : SdlMixerManager() {
_outputRate = 22050;
_callsCounter = 0;
_callbackPeriod = 10;
_samples = 8192;
while (_samples * 16 > _outputRate * 2)
_samples >>= 1;
_samplesBuf = new uint8[_samples * 4];
}
NullSdlMixerManager::~NullSdlMixerManager() {
delete _samplesBuf;
}
void NullSdlMixerManager::init() {
_mixer = new Audio::MixerImpl(_outputRate);
assert(_mixer);
_mixer->setReady(true);
}
void NullSdlMixerManager::suspendAudio() {
_audioSuspended = true;
}
int NullSdlMixerManager::resumeAudio() {
if (!_audioSuspended) {
return -2;
}
_audioSuspended = false;
return 0;
}
void NullSdlMixerManager::startAudio() {
}
void NullSdlMixerManager::callbackHandler(byte *samples, int len) {
assert(_mixer);
_mixer->mixCallback(samples, len);
}
void NullSdlMixerManager::update() {
if (_audioSuspended) {
return;
}
_callsCounter++;
if ((_callsCounter % _callbackPeriod) == 0) {
callbackHandler(_samplesBuf, _samples);
}
}
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