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