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/******************************************************************************
*
* Copyright 2022 Google LLC
*
* 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 __LC3_TABLES_H
#define __LC3_TABLES_H
#include "common.h"
#include "bits.h"
/**
* MDCT Twiddles and window coefficients
*/
struct lc3_fft_bf3_twiddles { int n3; const struct lc3_complex (*t)[2]; };
struct lc3_fft_bf2_twiddles { int n2; const struct lc3_complex *t; };
struct lc3_mdct_rot_def { int n4; const struct lc3_complex *w; };
extern const struct lc3_fft_bf3_twiddles *lc3_fft_twiddles_bf3[];
extern const struct lc3_fft_bf2_twiddles *lc3_fft_twiddles_bf2[][3];
extern const struct lc3_mdct_rot_def *lc3_mdct_rot[LC3_NUM_DT][LC3_NUM_SRATE];
extern const float *lc3_mdct_win[LC3_NUM_DT][LC3_NUM_SRATE];
/**
* Limits of bands
*/
#define LC3_NUM_BANDS 64
extern const int lc3_band_lim[LC3_NUM_DT][LC3_NUM_SRATE][LC3_NUM_BANDS+1];
/**
* SNS Quantization
*/
extern const float lc3_sns_lfcb[32][8];
extern const float lc3_sns_hfcb[32][8];
struct lc3_sns_vq_gains {
int count; const float *v;
};
extern const struct lc3_sns_vq_gains lc3_sns_vq_gains[4];
extern const int32_t lc3_sns_mpvq_offsets[][11];
/**
* TNS Arithmetic Coding
*/
extern const struct lc3_ac_model lc3_tns_order_models[];
extern const uint16_t lc3_tns_order_bits[][8];
extern const struct lc3_ac_model lc3_tns_coeffs_models[];
extern const uint16_t lc3_tns_coeffs_bits[][17];
/**
* Long Term Postfilter
*/
extern const float *lc3_ltpf_cnum[LC3_NUM_SRATE][4];
extern const float *lc3_ltpf_cden[LC3_NUM_SRATE][4];
/**
* Spectral Data Arithmetic Coding
*/
extern const uint8_t lc3_spectrum_lookup[2][2][256][4];
extern const struct lc3_ac_model lc3_spectrum_models[];
extern const uint16_t lc3_spectrum_bits[][17];
#endif /* __LC3_TABLES_H */
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