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diff --git a/engines/sherlock/scalpel/3do/movie_decoder.h b/engines/sherlock/scalpel/3do/movie_decoder.h
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+++ b/engines/sherlock/scalpel/3do/movie_decoder.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.
+ *
+ */
+
+#ifndef SHERLOCK_SCALPEL_3DO_MOVIE_DECODER_H
+#define SHERLOCK_SCALPEL_3DO_MOVIE_DECODER_H
+
+#include "common/rect.h"
+#include "video/video_decoder.h"
+#include "audio/decoders/3do.h"
+
+namespace Audio {
+class QueuingAudioStream;
+}
+
+namespace Common {
+class SeekableReadStream;
+}
+
+namespace Image {
+class Codec;
+}
+
+namespace Sherlock {
+
+class Scalpel3DOMovieDecoder : public Video::VideoDecoder {
+public:
+	Scalpel3DOMovieDecoder();
+	~Scalpel3DOMovieDecoder();
+
+	bool loadStream(Common::SeekableReadStream *stream);
+	void close();
+
+protected:
+	void readNextPacket();
+
+private:
+	int32 _streamVideoOffset; /* current stream offset for video decoding */
+	int32 _streamAudioOffset; /* current stream offset for audio decoding */
+
+private:
+	class StreamVideoTrack : public VideoTrack  {
+	public:
+		StreamVideoTrack(uint32 width, uint32 height, uint32 codecTag, uint32 frameCount);
+		~StreamVideoTrack();
+
+		bool endOfTrack() const;
+
+		uint16 getWidth() const { return _width; }
+		uint16 getHeight() const { return _height; }
+		Graphics::PixelFormat getPixelFormat() const;
+		int getCurFrame() const { return _curFrame; }
+		int getFrameCount() const { return _frameCount; }
+		void setNextFrameStartTime(uint32 nextFrameStartTime) { _nextFrameStartTime = nextFrameStartTime; }
+		uint32 getNextFrameStartTime() const { return _nextFrameStartTime; }
+		const Graphics::Surface *decodeNextFrame() { return _surface; }
+
+		void decodeFrame(Common::SeekableReadStream *stream, uint32 videoTimeStamp);
+
+	private:
+		const Graphics::Surface *_surface;
+
+		int _curFrame;
+		uint32 _frameCount;
+		uint32 _nextFrameStartTime;
+
+		Image::Codec *_codec;
+		uint16 _width, _height;
+	};
+
+	class StreamAudioTrack : public AudioTrack {
+	public:
+		StreamAudioTrack(uint32 codecTag, uint32 sampleRate, uint32 channels);
+		~StreamAudioTrack();
+
+		void queueAudio(Common::SeekableReadStream *stream, uint32 size);
+
+	protected:
+		Audio::AudioStream *getAudioStream() const;
+
+	private:
+		Audio::QueuingAudioStream *_audioStream;
+		uint32 _totalAudioQueued; /* total amount of milliseconds of audio, that we queued up already */
+
+	public:
+		uint32 getTotalAudioQueued() const { return _totalAudioQueued; }
+
+	private:
+		int16 decodeSample(uint8 dataNibble);
+
+		uint32 _codecTag;
+		uint16 _sampleRate;
+		bool   _stereo;
+
+		Audio::audio_3DO_ADP4_PersistentSpace _ADP4_PersistentSpace;
+		Audio::audio_3DO_SDX2_PersistentSpace _SDX2_PersistentSpace;
+	};
+
+	Common::SeekableReadStream *_stream;
+	StreamVideoTrack *_videoTrack;
+	StreamAudioTrack *_audioTrack;
+};
+
+// Testing
+extern bool Scalpel3DOMoviePlay(const char *filename, Common::Point pos);
+
+} // End of namespace Sherlock
+
+#endif