/* 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 VOYEUR_ANIMATION_H
#define VOYEUR_ANIMATION_H

#include "video/video_decoder.h"
#include "audio/audiostream.h"
#include "audio/mixer.h"
#include "common/list.h"
#include "common/rect.h"
#include "common/stream.h"

namespace Voyeur {

class VoyeurEngine;

}

namespace Video {

/**
 * Decoder for RL2 videos.
 *
 * Video decoder used in engines:
 *  - voyeur
 */
class RL2Decoder : public VideoDecoder {
private:
	class RL2FileHeader {
	public:
		uint32 _form;
		uint32 _backSize;
		uint32 _signature;
		uint32 _dataSize;
		int _numFrames;
		int _method;
		int _soundRate;
		int _rate;
		int _channels;
		int _defSoundSize;
		int _videoBase;
		int _colorCount;
		byte _palette[768];

		uint32 *_frameOffsets;
		int *_frameSoundSizes;
		bool _isRLV3;
	public:
		RL2FileHeader();
		~RL2FileHeader();
		void load(Common::SeekableReadStream *stream);
		bool isValid() const;
	};

	class RL2AudioTrack : public AudioTrack {
	public:
		RL2AudioTrack(const RL2FileHeader &header, Common::SeekableReadStream *stream,
			Audio::Mixer::SoundType soundType);
		~RL2AudioTrack();

		void queueSound(Common::SeekableReadStream *stream, int size);
		Audio::Mixer::SoundType getSoundType() const { return _soundType; }

	protected:
		Audio::AudioStream *getAudioStream() const;

	private:
		Audio::Mixer::SoundType _soundType;
		const RL2FileHeader &_header;

		Audio::QueuingAudioStream *_audStream;
		Audio::QueuingAudioStream *createAudioStream();
	};

	class RL2VideoTrack : public VideoTrack {
	public:
		RL2VideoTrack(const RL2FileHeader &header, RL2AudioTrack *audioTrack, 
			Common::SeekableReadStream *stream);
		~RL2VideoTrack();

		bool endOfTrack() const;
		bool isRewindable() const { return true; }
		bool rewind();

		uint16 getWidth() const;
		uint16 getHeight() const;
		Graphics::Surface *getSurface() { return _surface; }
		Graphics::Surface *getBackSurface();
		Graphics::PixelFormat getPixelFormat() const;
		int getCurFrame() const { return _curFrame; }
		int getFrameCount() const { return _header._numFrames; }
		uint32 getNextFrameStartTime() const { return _nextFrameStartTime; }
		const Graphics::Surface *decodeNextFrame();
		const byte *getPalette() const { _dirtyPalette = false; return _header._palette; }
		int getPaletteCount() const { return _header._colorCount; }
		bool hasDirtyPalette() const { return _dirtyPalette; }
		const Common::List<Common::Rect> *getDirtyRects() const { return &_dirtyRects; }
		void clearDirtyRects() { _dirtyRects.clear(); }
		void copyDirtyRectsToBuffer(uint8 *dst, uint pitch);

	private:
		Common::SeekableReadStream *_fileStream;
		const RL2FileHeader &_header;
		RL2AudioTrack *_audioTrack;
		Graphics::Surface *_surface;
		Graphics::Surface *_backSurface;
		bool _hasBackFrame;

		mutable bool _dirtyPalette;

		int _curFrame;
		uint32 _videoBase;
		uint32 *_frameOffsets;
		uint32 _frameDelay;
		uint32 _nextFrameStartTime;

		Common::List<Common::Rect> _dirtyRects;

		void copyFrame(uint8 *data);
		void rl2DecodeFrameWithTransparency(int screenOffset);
		void rl2DecodeFrameWithoutTransparency(int screenOffset = -1);
		void initBackSurface();
	};

private:
	Audio::Mixer::SoundType _soundType;
	RL2FileHeader _header;
public:
	RL2Decoder(Audio::Mixer::SoundType soundType = Audio::Mixer::kPlainSoundType);
	virtual ~RL2Decoder();

	bool loadStream(Common::SeekableReadStream *stream);
	bool loadVideo(int videoId);

	const Common::List<Common::Rect> *getDirtyRects() const;
	void clearDirtyRects();
	void copyDirtyRectsToBuffer(uint8 *dst, uint pitch);
	RL2VideoTrack *getVideoTrack();
	void play(::Voyeur::VoyeurEngine *vm);
	int getPaletteCount() const { return _header._colorCount; }
};

} // End of namespace Video

#endif /* VOYEUR_ANIMATION_H */