Initial commit

engines/cryo/sound.cpp

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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 3 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, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#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);
+}
+
+}