/****************************************************************************** * * 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 */