76 lines
2.0 KiB
C++
76 lines
2.0 KiB
C++
/*
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* ArithmeticDec.hpp
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*
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* Copyright 2019 HIMSA II K/S - www.himsa.dk. Represented by EHIMA - www.ehima.com
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef __ARITHMETIC_DEC_HPP_
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#define __ARITHMETIC_DEC_HPP_
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#include <cstdint>
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#include "Datapoints.hpp"
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namespace Lc3Dec
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{
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struct ac_dec_state {
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uint32_t low;
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uint32_t range;
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};
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class ArithmeticDec
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{
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public:
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ArithmeticDec(uint16_t NF_, uint16_t NE_, uint16_t rateFlag_, uint8_t tns_lpc_weighting_);
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virtual ~ArithmeticDec();
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void registerDatapoints(DatapointContainer* datapoints);
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double rc_q(uint8_t k, uint8_t f);
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void run(
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const uint8_t* bytes,
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uint16_t& bp,
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uint16_t& bp_side,
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uint8_t& mask_side,
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int16_t& num_tns_filters,
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int16_t rc_order[],
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const uint8_t& lsbMode,
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const int16_t& lastnz,
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uint16_t nbits,
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uint8_t& BEC_detect
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);
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const uint16_t NF;
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const uint16_t NE;
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const uint16_t rateFlag;
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const uint8_t tns_lpc_weighting;
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// states & outputs
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int16_t* X_hat_q_ari;
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uint8_t* save_lev;
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int16_t nf_seed;
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int16_t rc_order_ari[2];
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int16_t rc_i[2*8]; // [max(rc_order[f])=8][max(num_tns_filters)=2]
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uint16_t nbits_residual;
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private:
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struct ac_dec_state st;
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};
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}//namespace Lc3Dec
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#endif // __ARITHMETIC_DEC_HPP_
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