2012-06-04 10:47:12 +00:00
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/**
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* HEVC Encoder
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* - Marko Viitanen ( fador at iki.fi ), Tampere University of Technology, Department of Computer Systems.
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*/
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/*! \file cabac.h
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\brief CABAC
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\author Marko Viitanen
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\date 2012-06
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Content-adaptive binary arithmetic coder
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*/
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#ifndef __CABAC_H
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#define __CABAC_H
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#include "bitstream.h"
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extern const uint8_t g_aucNextStateMPS[ 128 ];
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extern const uint8_t g_aucNextStateLPS[ 128 ];
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extern const uint32_t g_entropyBits[128];
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extern uint8_t g_nextState[128][2];
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extern const uint8_t g_aucLPSTable[64][4];
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extern const uint8_t g_aucRenormTable[32];
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typedef struct
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{
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uint8_t ucState;
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uint32_t binsCoded;
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} cabac_ctx;
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void cxt_init(cabac_ctx* ctx,uint32_t qp, uint32_t initValue );
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void cxt_buildNextStateTable();
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void ctx_update(cabac_ctx* ctx, int val );
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void ctx_update_LPS(cabac_ctx* ctx);
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void ctx_update_MPS(cabac_ctx* ctx);
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typedef struct
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{
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cabac_ctx ctx;
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uint32_t uiLow;
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uint32_t uiRange;
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uint32_t bufferedByte;
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int32_t numBufferedBytes;
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int32_t bitsLeft;
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uint32_t uiBinsCoded;
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int32_t binCountIncrement;
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uint64_t fracBits;
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bitstream* stream;
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} cabac_data;
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extern cabac_data cabac;
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void cabac_init(cabac_data* data);
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void cabac_encodeBin(cabac_data* data, uint32_t binValue );
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void cabac_encodeFlush(cabac_data* data, uint8_t end );
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void cabac_encodeBinEP(cabac_data* data, uint32_t binValue );
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void cabac_encodeBinsEP(cabac_data* data, uint32_t binValues, int numBins );
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void cabac_write(cabac_data* data);
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void cabac_finish(cabac_data* data);
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void cabac_flush(cabac_data* data);
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#endif
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