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90 lines
2.3 KiB
C++
90 lines
2.3 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
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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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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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*
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*/
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#ifndef VIDEO_CODECS_CINEPAK_H
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#define VIDEO_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 "video/codecs/codec.h"
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namespace Common {
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class SeekableReadStream;
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}
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namespace Video {
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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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};
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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 in video:
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* - AVIDecoder
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* - QuickTimeDecoder
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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();
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const Graphics::Surface *decodeImage(Common::SeekableReadStream *stream);
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Graphics::PixelFormat getPixelFormat() const { return _pixelFormat; }
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private:
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CinepakFrame _curFrame;
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int32 _y;
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Graphics::PixelFormat _pixelFormat;
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byte *_clipTable, *_clipTableBuf;
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void loadCodebook(Common::SeekableReadStream *stream, uint16 strip, byte codebookType, byte chunkID, uint32 chunkSize);
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void decodeVectors(Common::SeekableReadStream *stream, uint16 strip, byte chunkID, uint32 chunkSize);
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};
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} // End of namespace Video
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#endif
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