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engines/gob/sound/soundblaster.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/>.
+ *
+ *
+ * This file is dual-licensed.
+ * In addition to the GPLv3 license mentioned above, this code is also
+ * licensed under LGPL 2.1. See LICENSES/COPYING.LGPL file for the
+ * full text of the license.
+ *
+ */
+
+#include "gob/sound/soundblaster.h"
+#include "gob/sound/sounddesc.h"
+
+namespace Gob {
+
+SoundBlaster::SoundBlaster(Audio::Mixer &mixer) : SoundMixer(mixer, Audio::Mixer::kSFXSoundType) {
+	_curSoundDesc = nullptr;
+
+	_compositionSamples = nullptr;
+	_compositionSampleCount = 0;
+	_compositionPos = -1;
+
+	_compositionRepCount = 0;
+}
+
+SoundBlaster::~SoundBlaster() {
+}
+
+void SoundBlaster::playSample(SoundDesc &sndDesc, int16 repCount,
+		int16 frequency, int16 fadeLength) {
+	SoundMixer::play(sndDesc, repCount, frequency, fadeLength);
+}
+
+void SoundBlaster::stopSound(int16 fadeLength, SoundDesc *sndDesc) {
+	Common::StackLock slock(_mutex);
+
+	if (sndDesc && (sndDesc != _curSoundDesc))
+		return;
+
+	_compositionRepCount = 0;
+
+	if (fadeLength <= 0)
+		_curSoundDesc = nullptr;
+
+	SoundMixer::stop(fadeLength);
+}
+
+void SoundBlaster::stopComposition() {
+	if (_compositionPos != -1) {
+		stopSound(0);
+		_compositionPos = -1;
+	}
+}
+
+void SoundBlaster::endComposition() {
+	_compositionPos = -1;
+	_compositionRepCount = 0;
+}
+
+void SoundBlaster::nextCompositionPos() {
+	int8 slot;
+
+	while ((++_compositionPos < 50) &&
+			((slot = _composition[_compositionPos]) != -1)) {
+		if ((slot >= 0) && (slot < _compositionSampleCount)) {
+			SoundDesc &sample = _compositionSamples[slot];
+			if (!sample.empty() && (sample.getType() == SOUND_SND)) {
+				setSample(sample, 1, 0, 0);
+				return;
+			}
+		}
+		if (_compositionPos == 49)
+			_compositionPos = -1;
+	}
+
+	_compositionPos = -1;
+}
+
+void SoundBlaster::playComposition(const int16 *composition, int16 freqVal,
+		SoundDesc *sndDescs, int8 sndCount) {
+
+	_compositionSamples = sndDescs;
+	_compositionSampleCount = sndCount;
+
+	int i = -1;
+	do {
+		i++;
+		_composition[i] = composition[i];
+	} while ((i < 49) && (composition[i] != -1));
+
+	_compositionPos = -1;
+	nextCompositionPos();
+}
+
+void SoundBlaster::repeatComposition(int32 repCount) {
+	_compositionRepCount = repCount;
+}
+
+void SoundBlaster::setSample(SoundDesc &sndDesc, int16 repCount, int16 frequency,
+		int16 fadeLength) {
+
+	_curSoundDesc = &sndDesc;
+	SoundMixer::setSample(sndDesc, repCount, frequency, fadeLength);
+}
+
+void SoundBlaster::checkEndSample() {
+	if (_compositionPos != -1) {
+		nextCompositionPos();
+		return;
+	}
+
+	if (_compositionRepCount != 0) {
+		if (_compositionRepCount > 0)
+			_compositionRepCount--;
+
+		nextCompositionPos();
+		if (_compositionPos != -1)
+			return;
+	}
+
+	SoundMixer::checkEndSample();
+}
+
+void SoundBlaster::endFade() {
+	if (_fadeVolStep > 0) {
+		_compositionPos = -1;
+		_curSoundDesc = nullptr;
+	}
+
+	SoundMixer::endFade();
+}
+
+} // End of namespace Gob