/* 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.
 *
 * $URL$
 * $Id$
 *
 */

/**
 * Video decoder used in engines:
 *  - tucker
 */

#ifndef GRAPHICS_VIDEO_FLICPLAYER_H
#define GRAPHICS_VIDEO_FLICPLAYER_H

#include "common/scummsys.h"
#include "common/list.h"
#include "common/rect.h"

namespace Common {
	class SeekableReadStream;
}

namespace Graphics {

struct ChunkHeader {
	uint32 size;
	uint16 type;
};

struct FrameTypeChunkHeader {
	ChunkHeader header;
	uint16 numChunks;
	uint16 delay;
	uint16 reserved; // always zero
	uint16 widthOverride;
	uint16 heightOverride;
};

// TOD: rewrite this based on VideoDecoder & VideoPlayer (this may
// require improvements to these two classes).
class FlicPlayer {
public:
	FlicPlayer();
	~FlicPlayer();

	/**
	 * Returns the width of the video
	 * @return the width of the video
	 */
	int getWidth();

	/**
	 * Returns the height of the video
	 * @return the height of the video
	 */
	int getHeight();

	/**
	 * Returns the current frame number of the video
	 * @return the current frame number of the video
	 */
	int32 getCurFrame();

	/**
	 * Returns the amount of frames in the video
	 * @return the amount of frames in the video
	 */
	int32 getFrameCount();

	/**
	 * Load a FLIC encoded video file
	 * @param filename	the filename to load
	 */
	bool loadFile(const char *fileName);

	/**
	 * Close a FLIC encoded video file
	 */
	void closeFile();

	/**
	 * Decode the next frame
	 */
	void decodeNextFrame();

	bool isLastFrame() const { return _currFrame == _flicInfo.numFrames; }
	uint32 getSpeed() const { return _flicInfo.speed; }
	bool isPaletteDirty() const { return _paletteDirty; }
	const uint8 *getPalette() { _paletteDirty = false; return _palette; }
	const uint8 *getOffscreen() const { return _offscreen; }
	const Common::List<Common::Rect> *getDirtyRects() const { return &_dirtyRects; }
	void clearDirtyRects() { _dirtyRects.clear(); }
	void redraw();
	void reset();

	void copyDirtyRectsToBuffer(uint8 *dst, uint pitch);

	/**
	 * Copy current frame into the specified position of the destination
	 * buffer.
	 * @param dst		the buffer
	 * @param x		the x position of the buffer
	 * @param y		the y position of the buffer
	 * @param pitch		the pitch of buffer
	 */
	void copyFrameToBuffer(byte *dst, uint x, uint y, uint pitch);

private:
	struct FlicHeader {
		uint32 size;
		uint16 type;
		uint16 numFrames;
		uint16 width;
		uint16 height;
		uint32 speed;
		uint16 offsetFrame1;
		uint16 offsetFrame2;
	};

	ChunkHeader readChunkHeader();
	FrameTypeChunkHeader readFrameTypeChunkHeader(ChunkHeader chunkHead);
	void decodeByteRun(uint8 *data);
	void decodeDeltaFLC(uint8 *data);
	void setPalette(uint8 *mem);

	Common::SeekableReadStream *_fileStream;
	bool _paletteDirty;
	uint8 *_offscreen;
	uint8 _palette[256 * 4];
	FlicHeader _flicInfo;
	uint16 _currFrame;
	Common::List<Common::Rect> _dirtyRects;
};

} // End of namespace Graphics

#endif