84 lines
2.4 KiB
C++
84 lines
2.4 KiB
C++
/*
|
|
* SpectralQuantization.hpp
|
|
*
|
|
* Copyright 2019 HIMSA II K/S - www.himsa.dk. Represented by EHIMA - www.ehima.com
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
|
|
#ifndef SPECTRAL_QUANTIZATION_H_
|
|
#define SPECTRAL_QUANTIZATION_H_
|
|
|
|
#include <cstdint>
|
|
#include "Datapoints.hpp"
|
|
|
|
namespace Lc3Enc
|
|
{
|
|
|
|
class SpectralQuantization
|
|
{
|
|
public:
|
|
SpectralQuantization(uint16_t NE_, uint8_t fs_ind_);
|
|
virtual ~SpectralQuantization();
|
|
|
|
void registerDatapoints(DatapointContainer* datapoints_);
|
|
|
|
void run(const double* const X_f, uint16_t nbits, uint16_t nbits_spec_local);
|
|
|
|
private:
|
|
void updateGlobalGainEstimationParameter(uint16_t nbits, uint16_t nbits_spec_local);
|
|
void computeSpectralEnergy(double* E, const double* X_f);
|
|
void globalGainEstimation(const double* E);
|
|
bool globalGainLimitation(const double* const X_f);
|
|
void quantizeSpectrum(const double* const X_f);
|
|
void computeBitConsumption(
|
|
uint16_t nbits,
|
|
uint8_t& modeFlag);
|
|
bool globalGainAdjustment();
|
|
|
|
public:
|
|
static const uint8_t N_b = 64;
|
|
|
|
const uint16_t NE;
|
|
const uint8_t fs_ind;
|
|
|
|
int16_t* X_q;
|
|
uint16_t lastnz;
|
|
uint16_t nbits_lsb;
|
|
uint16_t nbits_trunc;
|
|
uint16_t rateFlag;
|
|
uint8_t lsbMode;
|
|
float gg;
|
|
uint16_t lastnz_trunc;
|
|
int16_t gg_ind;
|
|
|
|
private:
|
|
DatapointContainer* datapoints;
|
|
int16_t gg_off;
|
|
int16_t gg_min;
|
|
float nbits_offset;
|
|
uint16_t nbits_spec;
|
|
uint16_t nbits_spec_adj;
|
|
uint16_t nbits_est;
|
|
|
|
// states
|
|
bool reset_offset_old;
|
|
float nbits_offset_old;
|
|
uint16_t nbits_spec_old;
|
|
uint16_t nbits_est_old;
|
|
};
|
|
|
|
}//namespace Lc3Enc
|
|
|
|
#endif // SPECTRAL_QUANTIZATION_H_
|