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diff --git a/engines/kyra/sound/sound_adlib.h b/engines/kyra/sound/sound_adlib.h
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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 2
+ * 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, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
+ *
+ * LGPL License
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ *
+ */
+
+#ifndef KYRA_SOUND_ADLIB_H
+#define KYRA_SOUND_ADLIB_H
+
+#include "kyra/sound/sound.h"
+
+#include "common/mutex.h"
+
+namespace Kyra {
+class AdLibDriver;
+
+/**
+ * AdLib implementation of the sound output device.
+ *
+ * It uses a special sound file format special to
+ * Dune II, Kyrandia 1 and 2. While Dune II and
+ * Kyrandia 1 are using exact the same format, the
+ * one of Kyrandia 2 slightly differs.
+ *
+ * See AdLibDriver for more information.
+ * @see AdLibDriver
+ */
+class SoundAdLibPC : public Sound {
+public:
+	SoundAdLibPC(KyraEngine_v1 *vm, Audio::Mixer *mixer);
+	~SoundAdLibPC();
+
+	virtual kType getMusicType() const { return kAdLib; }
+
+	virtual bool init();
+	virtual void process();
+
+	virtual void updateVolumeSettings();
+
+	virtual void initAudioResourceInfo(int set, void *info);
+	virtual void selectAudioResourceSet(int set);
+	virtual bool hasSoundFile(uint file) const;
+	virtual void loadSoundFile(uint file);
+	virtual void loadSoundFile(Common::String file);
+
+	virtual void playTrack(uint8 track);
+	virtual void haltTrack();
+	virtual bool isPlaying() const;
+
+	virtual void playSoundEffect(uint8 track, uint8 volume = 0xFF);
+
+	virtual void beginFadeOut();
+
+	virtual int checkTrigger();
+	virtual void resetTrigger();
+private:
+	void internalLoadFile(Common::String file);
+
+	void play(uint8 track, uint8 volume);
+
+	const SoundResourceInfo_PC *res() const {return _resInfo[_currentResourceSet]; }
+	SoundResourceInfo_PC *_resInfo[3];
+	int _currentResourceSet;
+
+	AdLibDriver *_driver;
+
+	int _version;
+	uint8 _trackEntries[500];
+	uint8 *_soundDataPtr;
+	int _sfxPlayingSound;
+
+	Common::String _soundFileLoaded;
+
+	int _numSoundTriggers;
+	const int *_soundTriggers;
+
+	static const int _kyra1NumSoundTriggers;
+	static const int _kyra1SoundTriggers[];
+};
+
+} // End of namespace Kyra
+
+#endif