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engines/scumm/imuse_digi/dimuse_groups.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 "scumm/imuse_digi/dimuse_engine.h"
+#include "scumm/imuse_digi/dimuse_groups.h"
+
+namespace Scumm {
+
+IMuseDigiGroupsHandler::IMuseDigiGroupsHandler(IMuseDigital *engine, Common::Mutex *mutex) {
+	_engine = engine;
+	_mutex = mutex;
+}
+
+IMuseDigiGroupsHandler::~IMuseDigiGroupsHandler() {}
+
+int IMuseDigiGroupsHandler::init() {
+	for (int i = 0; i < DIMUSE_MAX_GROUPS; i++) {
+		_effVols[i] = 127;
+		_vols[i] = 127;
+	}
+	return 0;
+}
+
+int IMuseDigiGroupsHandler::setGroupVol(int id, int volume) {
+	Common::StackLock lock(*_mutex);
+
+	int l;
+
+	if (id >= DIMUSE_MAX_GROUPS) {
+		return -5;
+	}
+
+	if (volume == -1) {
+		return _vols[id];
+	}
+
+	if (volume > 127)
+		return -5;
+
+	if (id) {
+		_vols[id] = volume;
+		_effVols[id] = (_vols[0] * (volume + 1)) / 128;
+	} else {
+		_effVols[0] = volume;
+		_vols[0] = volume;
+
+		for (l = 1; l < DIMUSE_MAX_GROUPS; l++) {
+			_effVols[l] = (volume * (_vols[l] + 1)) / 128;
+		}
+	}
+
+	_engine->diMUSEUpdateGroupVolumes();
+	return _vols[id];
+}
+
+int IMuseDigiGroupsHandler::getGroupVol(int id) {
+	Common::StackLock lock(*_mutex);
+
+	if (id >= DIMUSE_MAX_GROUPS) {
+		return -5;
+	}
+
+	return _effVols[id];
+}
+
+} // End of namespace Scumm