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https://github.com/libretro/scummvm.git
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107 lines
2.6 KiB
C++
107 lines
2.6 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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// Based on the TrueMotion 1 decoder by Alex Beregszaszi & Mike Melanson in FFmpeg
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// Only compile if SCI32 is enabled, ZVISION is enabled, or if we're building dynamic modules
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#if defined(ENABLE_SCI32) || defined(ENABLE_ZVISION) || defined(DYNAMIC_MODULES)
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#ifndef IMAGE_CODECS_TRUEMOTION1_H
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#define IMAGE_CODECS_TRUEMOTION1_H
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#include "image/codecs/codec.h"
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namespace Image {
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/**
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* Duck TrueMotion 1 decoder.
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*
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* Used by BMP/AVI.
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*/
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class TrueMotion1Decoder : public Codec {
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public:
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TrueMotion1Decoder();
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~TrueMotion1Decoder();
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const Graphics::Surface *decodeFrame(Common::SeekableReadStream &stream);
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// Always return RGB565
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Graphics::PixelFormat getPixelFormat() const { return Graphics::PixelFormat(2, 5, 6, 5, 0, 11, 5, 0, 0); }
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private:
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Graphics::Surface *_surface;
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int _mbChangeBitsRowSize;
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byte *_buf, *_mbChangeBits, *_indexStream;
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int _indexStreamSize;
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int _flags;
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struct PredictorTableEntry {
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uint32 color;
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bool getNextIndex;
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};
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PredictorTableEntry _yPredictorTable[1024];
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PredictorTableEntry _cPredictorTable[1024];
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int _blockType;
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int _blockWidth;
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int _blockHeight;
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int16 _ydt[8];
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int16 _cdt[8];
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int _lastDeltaset, _lastVectable;
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uint32 *_vertPred;
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struct {
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byte headerSize;
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byte compression;
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byte deltaset;
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byte vectable;
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uint16 ysize;
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uint16 xsize;
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uint16 checksum;
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byte version;
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byte headerType;
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byte flags;
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byte control;
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uint16 xoffset;
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uint16 yoffset;
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uint16 width;
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uint16 height;
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} _header;
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void selectDeltaTables(int deltaTableIndex);
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void decodeHeader(Common::SeekableReadStream &stream);
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void decode16();
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int makeYdt16Entry(int p1, int p2);
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int makeCdt16Entry(int p1, int p2);
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void genVectorTable16(const byte *selVectorTable);
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};
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} // End of namespace Image
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#endif // IMAGE_CODECS_TRUEMOTION1_H
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#endif // SCI32/Plugins guard
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