embdrv/lc3/Encoder/SnsQuantization.hpp

/*
 * SnsQuantization.hpp
 *
 * Copyright 2021 HIMSA II K/S - www.himsa.com. 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 SNS_QUANTIZATION_H_
#define SNS_QUANTIZATION_H_

#include <cstdint>

#include "Datapoints.hpp"

namespace Lc3Enc {

class SnsQuantization {
 public:  // methods
  SnsQuantization();
  virtual ~SnsQuantization();

  void registerDatapoints(DatapointContainer* datapoints);

  void run(const double* const scf);

 private:  // methods
  void normalizeCandidate(int8_t* y, double* XQ, uint8_t N);
  void MPVQenum(int32_t& index, int32_t& lead_sign_ind,
                uint8_t dim_in, /* i : dimension of vec_in */
                int8_t vec_in[] /* i : PVQ integer pulse train */
  );
  uint32_t encPushSign(int8_t val, int32_t& next_sign_ind_in, int32_t index_in);

 public:  // members
  static const uint8_t Nscales = 16;

  double scfQ[Nscales];
  uint8_t ind_LF;
  uint8_t ind_HF;
  uint8_t shape_j;
  uint8_t Gind;
  int32_t LS_indA;
  int32_t LS_indB;
  uint32_t index_joint_j;

 private:  // members
  int32_t idxA;
  int32_t idxB;
  double t2rot[Nscales];
  int8_t sns_Y0[16];
  int8_t sns_Y1[10];
  int8_t sns_Y2[16];
  int8_t sns_Y3[16];
  double sns_XQ0[Nscales];
  double
      sns_XQ1[Nscales];  // do not minimize to 10 -> last 6 values are all zeros
                         // which is important for the inverse D-transform
  double sns_XQ2[Nscales];
  double sns_XQ3[Nscales];
  DatapointContainer* datapoints;
};

}  // namespace Lc3Enc

#endif  // SNS_QUANTIZATION_H_