Initial commit

engines/sci/sound/sync.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 "sci/engine/kernel.h"
+#include "sci/util.h"
+#include "sync.h"
+
+namespace Sci {
+
+Sync::Sync(ResourceManager *resMan, SegManager *segMan) :
+	_resMan(resMan),
+	_segMan(segMan),
+	_resource(nullptr),
+	_offset(0) {}
+
+Sync::~Sync() {
+	stop();
+}
+
+void Sync::start(const ResourceId id, const reg_t syncObjAddr) {
+	_resource = _resMan->findResource(id, true);
+	_offset = 0;
+
+	if (_resource) {
+		writeSelectorValue(_segMan, syncObjAddr, SELECTOR(syncCue), 0);
+	} else {
+		warning("Sync::start: failed to find resource %s", id.toString().c_str());
+		// Notify the scripts to stop sound sync
+		writeSelectorValue(_segMan, syncObjAddr, SELECTOR(syncCue), SIGNAL_OFFSET);
+	}
+}
+
+void Sync::next(const reg_t syncObjAddr) {
+	if (_resource && (_offset < _resource->size() - 1)) {
+		int16 syncCue = -1;
+		int16 syncTime = _resource->getInt16SEAt(_offset);
+
+		_offset += 2;
+
+		if ((syncTime != -1) && (_offset < _resource->size() - 1)) {
+			syncCue = _resource->getInt16SEAt(_offset);
+			_offset += 2;
+		}
+
+		writeSelectorValue(_segMan, syncObjAddr, SELECTOR(syncTime), syncTime);
+		writeSelectorValue(_segMan, syncObjAddr, SELECTOR(syncCue), syncCue);
+	}
+}
+
+void Sync::stop() {
+	if (_resource) {
+		_resMan->unlockResource(_resource);
+		_resource = nullptr;
+	}
+}
+
+} // End of namespace Sci