diff options
Diffstat (limited to 'backends/mixer/nullmixer/nullsdl-mixer.cpp')
-rw-r--r-- | backends/mixer/nullmixer/nullsdl-mixer.cpp | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/backends/mixer/nullmixer/nullsdl-mixer.cpp b/backends/mixer/nullmixer/nullsdl-mixer.cpp new file mode 100644 index 0000000000..2fd652e19f --- /dev/null +++ b/backends/mixer/nullmixer/nullsdl-mixer.cpp @@ -0,0 +1,75 @@ +/* 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(g_system, _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); + } +} |