1 /****************************************************************************** 2 * 3 * Copyright 2022 Google LLC 4 * 5 * Licensed under the Apache License, Version 2.0 (the "License"); 6 * you may not use this file except in compliance with the License. 7 * You may obtain a copy of the License at: 8 * 9 * http://www.apache.org/licenses/LICENSE-2.0 10 * 11 * Unless required by applicable law or agreed to in writing, software 12 * distributed under the License is distributed on an "AS IS" BASIS, 13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 14 * See the License for the specific language governing permissions and 15 * limitations under the License. 16 * 17 ******************************************************************************/ 18 19 #ifndef __LC3_TABLES_H 20 #define __LC3_TABLES_H 21 22 #include "common.h" 23 #include "bits.h" 24 25 26 /** 27 * MDCT Twiddles and window coefficients 28 */ 29 30 struct lc3_fft_bf3_twiddles { int n3; const struct lc3_complex (*t)[2]; }; 31 struct lc3_fft_bf2_twiddles { int n2; const struct lc3_complex *t; }; 32 struct lc3_mdct_rot_def { int n4; const struct lc3_complex *w; }; 33 34 extern const struct lc3_fft_bf3_twiddles *lc3_fft_twiddles_bf3[]; 35 extern const struct lc3_fft_bf2_twiddles *lc3_fft_twiddles_bf2[][3]; 36 extern const struct lc3_mdct_rot_def *lc3_mdct_rot[LC3_NUM_DT][LC3_NUM_SRATE]; 37 38 extern const float *lc3_mdct_win[LC3_NUM_DT][LC3_NUM_SRATE]; 39 40 41 /** 42 * Limits of bands 43 */ 44 45 #define LC3_NUM_BANDS 64 46 47 extern const int lc3_band_lim[LC3_NUM_DT][LC3_NUM_SRATE][LC3_NUM_BANDS+1]; 48 49 50 /** 51 * SNS Quantization 52 */ 53 54 extern const float lc3_sns_lfcb[32][8]; 55 extern const float lc3_sns_hfcb[32][8]; 56 57 struct lc3_sns_vq_gains { 58 int count; const float *v; 59 }; 60 61 extern const struct lc3_sns_vq_gains lc3_sns_vq_gains[4]; 62 63 extern const int32_t lc3_sns_mpvq_offsets[][11]; 64 65 66 /** 67 * TNS Arithmetic Coding 68 */ 69 70 extern const struct lc3_ac_model lc3_tns_order_models[]; 71 extern const uint16_t lc3_tns_order_bits[][8]; 72 73 extern const struct lc3_ac_model lc3_tns_coeffs_models[]; 74 extern const uint16_t lc3_tns_coeffs_bits[][17]; 75 76 77 /** 78 * Long Term Postfilter 79 */ 80 81 extern const float *lc3_ltpf_cnum[LC3_NUM_SRATE][4]; 82 extern const float *lc3_ltpf_cden[LC3_NUM_SRATE][4]; 83 84 85 /** 86 * Spectral Data Arithmetic Coding 87 */ 88 89 extern const uint8_t lc3_spectrum_lookup[2][2][256][4]; 90 extern const struct lc3_ac_model lc3_spectrum_models[]; 91 extern const uint16_t lc3_spectrum_bits[][17]; 92 93 94 #endif /* __LC3_TABLES_H */ 95
