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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.
*
*/
// Based on the TrueMotion 1 decoder by Alex Beregszaszi & Mike Melanson in FFmpeg
// Only compile if SCI32 is enabled, ZVISION is enabled, or if we're building dynamic modules
#if defined(ENABLE_SCI32) || defined(ENABLE_ZVISION) || defined(DYNAMIC_MODULES)
#ifndef VIDEO_CODECS_TRUEMOTION1_H
#define VIDEO_CODECS_TRUEMOTION1_H
#include "video/codecs/codec.h"
namespace Video {
/**
* Duck TrueMotion 1 decoder.
*
* Used in video:
* - AVIDecoder
*/
class TrueMotion1Decoder : public Codec {
public:
TrueMotion1Decoder(uint16 width, uint16 height);
~TrueMotion1Decoder();
const Graphics::Surface *decodeImage(Common::SeekableReadStream *stream);
// Always return RGB565
Graphics::PixelFormat getPixelFormat() const { return Graphics::PixelFormat(2, 5, 6, 5, 0, 11, 5, 0, 0); }
private:
Graphics::Surface *_surface;
int _mbChangeBitsRowSize;
byte *_buf, *_mbChangeBits, *_indexStream;
int _indexStreamSize;
uint16 _width, _height;
int _flags;
struct PredictorTableEntry {
uint32 color;
bool getNextIndex;
};
PredictorTableEntry _yPredictorTable[1024];
PredictorTableEntry _cPredictorTable[1024];
int _blockType;
int _blockWidth;
int _blockHeight;
int16 _ydt[8];
int16 _cdt[8];
int _lastDeltaset, _lastVectable;
uint32 *_vertPred;
struct {
byte headerSize;
byte compression;
byte deltaset;
byte vectable;
uint16 ysize;
uint16 xsize;
uint16 checksum;
byte version;
byte headerType;
byte flags;
byte control;
uint16 xoffset;
uint16 yoffset;
uint16 width;
uint16 height;
} _header;
void selectDeltaTables(int deltaTableIndex);
void decodeHeader(Common::SeekableReadStream *stream);
void decode16();
int makeYdt16Entry(int p1, int p2);
int makeCdt16Entry(int p1, int p2);
void genVectorTable16(const byte *selVectorTable);
};
} // End of namespace Video
#endif // VIDEO_CODECS_TRUEMOTION1_H
#endif // SCI32/Plugins guard
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