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97 lines
2.3 KiB
97 lines
2.3 KiB
15 years ago
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/*
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class for decoders
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Copyright (C) 1999 Martin Vogt
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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 Library General Public License as published by
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the Free Software Foundation.
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For more information look at the file COPYRIGHT in this package
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*/
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#ifndef __DECODERCLASS_H
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#define __DECODERCLASS_H
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#include "videoDecoder.h"
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#include "mpegVideoStream.h"
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#include "decoderTables.h"
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#include "slice.h"
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#include "proto.h"
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#include "../util/mmx/mmx.h"
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#include "mmxidct.h"
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#include "picture.h"
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/* Special values for DCT Coefficients */
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#define END_OF_BLOCK 62
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#define ESCAPE 61
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/* DCT coeff tables. */
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#define RUN_MASK 0xfc00
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#define LEVEL_MASK 0x03f0
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#define NUM_MASK 0x000f
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#define RUN_SHIFT 10
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#define LEVEL_SHIFT 4
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#define RUNTYPE char
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class DecoderClass {
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int lmmx;
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int zigzag_direct[256];
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/* Block structure. */
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short int dct_recon[8][8]; /* Reconstructed dct coeff matrix. */
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int dct_dc_y_past; /* Past lum. dc dct coefficient. */
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int dct_dc_cr_past; /* Past cr dc dct coefficient. */
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int dct_dc_cb_past; /* Past cb dc dct coefficient. */
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short int *reconptr; /* reconptr = dct_recon[0]; */
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class VideoDecoder* vid_stream;
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class MpegVideoStream* mpegVideoStream;
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public:
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DecoderClass(class VideoDecoder* vid_stream,
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class MpegVideoStream* mpegVideoStream);
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~DecoderClass();
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int decodeDCTDCSizeLum();
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int decodeDCTDCSizeChrom();
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int decodeMotionVectors();
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int decodeCBP();
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inline short int* getDCT() { return ((short int*) &(dct_recon[0][0]));}
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void resetDCT();
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void decodeMBTypeB(int& quant,int& motion_fwd,
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int& motion_bwd,int& pat,int& intra);
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void decodeMBTypeI(int& quant,int& motion_fwd,
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int& motion_bwd,int& pat,int& intra);
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void decodeMBTypeP(int& quant,int& motion_fwd,
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int& motion_bwd,int& pat,int& intra);
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void ParseReconBlock(int& n,int& mb_intra,unsigned int& quant_scale,
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int& lflag,
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unsigned int* iqmatrixptr,
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unsigned int* niqmatrixptr);
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int decodeMBAddrInc();
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void print();
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private:
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inline void decodeDCTCoeff(unsigned short int* dct_coeff_tbl,
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unsigned RUNTYPE& run,
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int& level);
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};
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#endif
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