embdrv/lc3/Encoder/SpectralNoiseShaping.hpp

/*
 * SpectralNoiseShaping.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 SPECTRAL_NOISE_SHAPING_H_
#define SPECTRAL_NOISE_SHAPING_H_

#include <cstdint>

#include "Datapoints.hpp"
#include "Lc3Config.hpp"
#include "SnsQuantization.hpp"

namespace Lc3Enc {

class SpectralNoiseShaping {
 public:
  SpectralNoiseShaping(const Lc3Config& lc3Config_, const int* const I_fs_);
  virtual ~SpectralNoiseShaping();

  void registerDatapoints(DatapointContainer* datapoints_);

  void run(const double* const X, const double* E_B, bool F_att);

  uint8_t get_ind_LF();
  uint8_t get_ind_HF();
  uint8_t get_shape_j();
  uint8_t get_Gind();
  int32_t get_LS_indA();
  int32_t get_LS_indB();
  uint32_t get_index_joint_j();

  static const uint8_t N_b = 64;
  static const uint8_t Nscales = 16;
  static const uint8_t nbits_SNS = 38;

  const Lc3Config& lc3Config;
  const uint8_t g_tilt;
  double* X_S;

 private:
  const int* const I_fs;
  SnsQuantization snsQuantization;
  double scf[Nscales];
  double g_SNS[N_b];
  DatapointContainer* datapoints;
};

}  // namespace Lc3Enc

#endif  // SPECTRAL_NOISE_SHAPING_H_