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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.
*
* $URL$
* $Id$
*
*/
#ifndef SCI_VIDEO_SEQ_DECODER_H
#define SCI_VIDEO_SEQ_DECODER_H
#include "video/video_decoder.h"
namespace Sci {
/**
* Implementation of the Sierra SEQ decoder, used in KQ6 DOS floppy/CD and GK1 DOS
*/
class SeqDecoder : public Video::FixedRateVideoDecoder {
public:
SeqDecoder();
virtual ~SeqDecoder();
bool loadStream(Common::SeekableReadStream *stream);
void close();
void setFrameDelay(int frameDelay) { _frameDelay = frameDelay; }
bool isVideoLoaded() const { return _fileStream != 0; }
uint16 getWidth() const { return SEQ_SCREEN_WIDTH; }
uint16 getHeight() const { return SEQ_SCREEN_HEIGHT; }
uint32 getFrameCount() const { return _frameCount; }
const Graphics::Surface *decodeNextFrame();
Graphics::PixelFormat getPixelFormat() const { return Graphics::PixelFormat::createFormatCLUT8(); }
const byte *getPalette() { _dirtyPalette = false; return _palette; }
bool hasDirtyPalette() const { return _dirtyPalette; }
protected:
Common::Rational getFrameRate() const { assert(_frameDelay); return Common::Rational(60, _frameDelay); }
private:
enum {
SEQ_SCREEN_WIDTH = 320,
SEQ_SCREEN_HEIGHT = 200
};
void readPaletteChunk(uint16 chunkSize);
bool decodeFrame(byte *rleData, int rleSize, byte *litData, int litSize, byte *dest, int left, int width, int height, int colorKey);
uint16 _width, _height;
uint16 _frameDelay;
Common::SeekableReadStream *_fileStream;
byte _palette[256 * 3];
bool _dirtyPalette;
uint32 _frameCount;
Graphics::Surface *_surface;
};
} // End of namespace Sci
#endif
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