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