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111 lines
3.3 KiB
C++
111 lines
3.3 KiB
C++
/* ScummVM - Graphic Adventure Engine
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*
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* ScummVM is the legal property of its developers, whose names
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* are too numerous to list here. Please refer to the COPYRIGHT
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* file distributed with this source distribution.
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#ifndef IMAGE_CODECS_CINEPAK_H
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#define IMAGE_CODECS_CINEPAK_H
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#include "common/scummsys.h"
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#include "common/rect.h"
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#include "graphics/pixelformat.h"
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#include "image/codecs/codec.h"
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namespace Common {
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class SeekableReadStream;
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}
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namespace Image {
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struct CinepakCodebook {
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// These are not in the normal YUV colorspace, but in the Cinepak YUV colorspace instead.
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byte y[4]; // [0, 255]
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int8 u, v; // [-128, 127]
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};
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struct CinepakStrip {
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uint16 id;
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uint16 length;
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Common::Rect rect;
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CinepakCodebook v1_codebook[256], v4_codebook[256];
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uint32 v1_dither[256 * 4 * 4], v4_dither[256 * 4 * 4];
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};
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struct CinepakFrame {
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byte flags;
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uint32 length;
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uint16 width;
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uint16 height;
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uint16 stripCount;
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CinepakStrip *strips;
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Graphics::Surface *surface;
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};
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/**
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* Cinepak decoder.
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*
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* Used by BMP/AVI and PICT/QuickTime.
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*
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* Used in engines:
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* - sherlock
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*/
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class CinepakDecoder : public Codec {
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public:
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CinepakDecoder(int bitsPerPixel = 24);
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~CinepakDecoder() override;
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const Graphics::Surface *decodeFrame(Common::SeekableReadStream &stream) override;
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Graphics::PixelFormat getPixelFormat() const override { return _pixelFormat; }
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bool setOutputPixelFormat(const Graphics::PixelFormat &format) override;
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bool containsPalette() const override { return _ditherPalette != 0; }
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const byte *getPalette() override { _dirtyPalette = false; return _ditherPalette; }
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bool hasDirtyPalette() const override { return _dirtyPalette; }
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bool canDither(DitherType type) const override;
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void setDither(DitherType type, const byte *palette) override;
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private:
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CinepakFrame _curFrame;
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int32 _y;
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int _bitsPerPixel;
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Graphics::PixelFormat _pixelFormat;
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byte *_clipTable, *_clipTableBuf;
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byte *_ditherPalette;
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bool _dirtyPalette;
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byte *_colorMap;
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DitherType _ditherType;
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void initializeCodebook(uint16 strip, byte codebookType);
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void loadCodebook(Common::SeekableReadStream &stream, uint16 strip, byte codebookType, byte chunkID, uint32 chunkSize);
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void decodeVectors8(Common::SeekableReadStream &stream, uint16 strip, byte chunkID, uint32 chunkSize);
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void decodeVectors24(Common::SeekableReadStream &stream, uint16 strip, byte chunkID, uint32 chunkSize);
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byte findNearestRGB(int index) const;
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void ditherVectors(Common::SeekableReadStream &stream, uint16 strip, byte chunkID, uint32 chunkSize);
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void ditherCodebookQT(uint16 strip, byte codebookType, uint16 codebookIndex);
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void ditherCodebookVFW(uint16 strip, byte codebookType, uint16 codebookIndex);
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};
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} // End of namespace Image
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#endif
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