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engines/gob/sound/bgatmosphere.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 "common/array.h"
+
+#include "gob/sound/bgatmosphere.h"
+#include "gob/sound/sound.h"
+#include "gob/sound/sounddesc.h"
+
+namespace Gob {
+
+BackgroundAtmosphere::BackgroundAtmosphere(Audio::Mixer &mixer) :
+	SoundMixer(mixer, Audio::Mixer::kMusicSoundType), _rnd("gobBA") {
+
+	_playMode = Sound::kPlayModeLinear;
+	_queuePos = -1;
+	_shaded = false;
+	_shadable = true;
+}
+
+BackgroundAtmosphere::~BackgroundAtmosphere() {
+	queueClear();
+}
+
+void BackgroundAtmosphere::playBA() {
+	Common::StackLock slock(_mutex);
+
+	_queuePos = -1;
+	getNextQueuePos();
+
+	if (_queuePos == -1)
+		return;
+
+	SoundMixer::play(*_queue[_queuePos], 1, 0);
+}
+
+void BackgroundAtmosphere::stopBA() {
+	SoundMixer::stop(0);
+}
+
+void BackgroundAtmosphere::setPlayMode(Sound::BackgroundPlayMode mode) {
+	_playMode = mode;
+}
+
+void BackgroundAtmosphere::queueSample(SoundDesc &sndDesc) {
+	Common::StackLock slock(_mutex);
+
+	_queue.push_back(&sndDesc);
+}
+
+void BackgroundAtmosphere::queueClear() {
+	Common::StackLock slock(_mutex);
+
+	SoundMixer::stop(0);
+	for (uint i = 0; i < _queue.size(); i++)
+		delete _queue[i];
+
+	_queue.clear();
+	_queuePos = -1;
+}
+
+void BackgroundAtmosphere::checkEndSample() {
+	Common::StackLock slock(_mutex);
+
+	getNextQueuePos();
+
+	if (_queuePos == -1) {
+		_end = true;
+		_playingSound = 0;
+	} else {
+		SoundMixer::setSample(*_queue[_queuePos], 1, 0, 0);
+		if (_shaded)
+			_fadeVol = 20000;
+	}
+}
+
+void BackgroundAtmosphere::getNextQueuePos() {
+	if (_queue.size() == 0) {
+		_queuePos = -1;
+		return;
+	}
+
+	switch (_playMode) {
+
+	case Sound::kPlayModeLinear:
+	default:
+		_queuePos = (_queuePos + 1) % _queue.size();
+		break;
+
+	case Sound::kPlayModeRandom:
+		_queuePos = _rnd.getRandomNumber(_queue.size() - 1);
+		break;
+
+	}
+}
+
+void BackgroundAtmosphere::setShadable(bool shadable) {
+	if (!shadable) {
+		unshade();
+		_shadable = false;
+	} else
+		_shadable = true;
+}
+
+void BackgroundAtmosphere::shade() {
+	if (!_shadable)
+		return;
+
+	_shaded = true;
+	_fadeVol = 32768;
+}
+
+void BackgroundAtmosphere::unshade() {
+	if (!_shadable)
+		return;
+
+	_shaded = false;
+	_fadeVol = 65536;
+}
+
+} // End of namespace Gob