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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 3 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, see <http://www.gnu.org/licenses/>.
*
*/
#ifndef IMAGE_CODECS_CINEPAK_H
#define IMAGE_CODECS_CINEPAK_H
#include "common/scummsys.h"
#include "common/rect.h"
#include "graphics/pixelformat.h"
#include "image/codecs/codec.h"
namespace Common {
class SeekableReadStream;
}
namespace Image {
struct CinepakCodebook {
// These are not in the normal YUV colorspace, but in the Cinepak YUV colorspace instead.
byte y[4]; // [0, 255]
int8 u, v; // [-128, 127]
};
struct CinepakStrip {
uint16 id;
uint16 length;
Common::Rect rect;
CinepakCodebook v1_codebook[256], v4_codebook[256];
uint32 v1_dither[256 * 4 * 4], v4_dither[256 * 4 * 4];
};
struct CinepakFrame {
byte flags;
uint32 length;
uint16 width;
uint16 height;
uint16 stripCount;
CinepakStrip *strips;
Graphics::Surface *surface;
};
/**
* Cinepak decoder.
*
* Used by BMP/AVI and PICT/QuickTime.
*
* Used in engines:
* - sherlock
*/
class CinepakDecoder : public Codec {
public:
CinepakDecoder(int bitsPerPixel = 24);
~CinepakDecoder() override;
const Graphics::Surface *decodeFrame(Common::SeekableReadStream &stream) override;
Graphics::PixelFormat getPixelFormat() const override { return _pixelFormat; }
bool setOutputPixelFormat(const Graphics::PixelFormat &format) override;
bool containsPalette() const override { return _ditherPalette != 0; }
const byte *getPalette() override { _dirtyPalette = false; return _ditherPalette; }
bool hasDirtyPalette() const override { return _dirtyPalette; }
bool canDither(DitherType type) const override;
void setDither(DitherType type, const byte *palette) override;
private:
CinepakFrame _curFrame;
int32 _y;
int _bitsPerPixel;
Graphics::PixelFormat _pixelFormat;
byte *_clipTable, *_clipTableBuf;
byte *_ditherPalette;
bool _dirtyPalette;
byte *_colorMap;
DitherType _ditherType;
void initializeCodebook(uint16 strip, byte codebookType);
void loadCodebook(Common::SeekableReadStream &stream, uint16 strip, byte codebookType, byte chunkID, uint32 chunkSize);
void decodeVectors8(Common::SeekableReadStream &stream, uint16 strip, byte chunkID, uint32 chunkSize);
void decodeVectors24(Common::SeekableReadStream &stream, uint16 strip, byte chunkID, uint32 chunkSize);
byte findNearestRGB(int index) const;
void ditherVectors(Common::SeekableReadStream &stream, uint16 strip, byte chunkID, uint32 chunkSize);
void ditherCodebookQT(uint16 strip, byte codebookType, uint16 codebookIndex);
void ditherCodebookVFW(uint16 strip, byte codebookType, uint16 codebookIndex);
};
} // End of namespace Image
#endif
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