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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 "cryo/sound.h"
#include "audio/audiostream.h"
#include "audio/mixer.h"
#include "audio/decoders/raw.h"
namespace Cryo {
CSoundChannel::CSoundChannel(Audio::Mixer *mixer, unsigned int sampleRate, bool stereo, bool is16bits) : _mixer(mixer), _sampleRate(sampleRate), _stereo(stereo) {
_bufferFlags = is16bits ? (Audio::FLAG_LITTLE_ENDIAN | Audio::FLAG_16BITS) : Audio::FLAG_UNSIGNED;
if (stereo)
_bufferFlags |= Audio::FLAG_STEREO;
_audioStream = nullptr;
_volumeLeft = _volumeRight = Audio::Mixer::kMaxChannelVolume;
}
CSoundChannel::~CSoundChannel() {
stop();
if (_audioStream)
delete _audioStream;
}
void CSoundChannel::queueBuffer(byte *buffer, unsigned int size, bool playNow, bool playQueue, bool buffering) {
if (playNow)
stop();
if (!buffer || !size)
return;
if (!_audioStream)
_audioStream = Audio::makeQueuingAudioStream(_sampleRate, _stereo);
if (buffering) {
byte *localBuffer = (byte*)malloc(size);
memcpy(localBuffer, buffer, size);
_audioStream->queueBuffer(localBuffer, size, DisposeAfterUse::YES, _bufferFlags);
} else
_audioStream->queueBuffer(buffer, size, DisposeAfterUse::NO, _bufferFlags);
if (playNow || playQueue)
play();
}
void CSoundChannel::play() {
if (!_audioStream)
return;
if (!_mixer->isSoundHandleActive(_soundHandle)) {
_mixer->playStream(Audio::Mixer::kSFXSoundType, &_soundHandle, _audioStream, -1, Audio::Mixer::kMaxChannelVolume, 0, DisposeAfterUse::NO);
applyVolumeChange();
}
}
void CSoundChannel::stop() {
if (_mixer->isSoundHandleActive(_soundHandle))
_mixer->stopHandle(_soundHandle);
if (_audioStream) {
_audioStream->finish();
delete _audioStream;
_audioStream = nullptr;
}
}
unsigned int CSoundChannel::numQueued() {
return _audioStream ? _audioStream->numQueuedStreams() : 0;
}
unsigned int CSoundChannel::getVolume() {
return (_volumeRight + _volumeLeft) / 2;
}
void CSoundChannel::setVolume(unsigned int volumeLeft, unsigned int volumeRight) {
_volumeLeft = volumeLeft;
_volumeRight = volumeRight;
applyVolumeChange();
}
void CSoundChannel::setVolumeLeft(unsigned int volume) {
setVolume(volume, _volumeRight);
}
void CSoundChannel::setVolumeRight(unsigned int volume) {
setVolume(_volumeLeft, volume);
}
void CSoundChannel::applyVolumeChange() {
unsigned int volume = (_volumeRight + _volumeLeft) / 2;
int balance = (signed int)(_volumeRight - _volumeLeft) / 2;
_mixer->setChannelVolume(_soundHandle, volume);
_mixer->setChannelBalance(_soundHandle, balance);
}
}
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