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_BWDET_H 20 #define __LC3_BWDET_H 21 22 #include "common.h" 23 #include "bits.h" 24 25 26 /** 27 * Bandwidth detector 28 * dt, sr Duration and samplerate of the frame 29 * e Energy estimation per bands 30 * return Return detected bandwitdth 31 */ 32 enum lc3_bandwidth lc3_bwdet_run( 33 enum lc3_dt dt, enum lc3_srate sr, const float *e); 34 35 /** 36 * Return number of bits coding the bandwidth value 37 * sr Samplerate of the frame 38 * return Number of bits coding the bandwidth value 39 */ 40 int lc3_bwdet_get_nbits(enum lc3_srate sr); 41 42 /** 43 * Put bandwidth indication 44 * bits Bitstream context 45 * sr Samplerate of the frame 46 * bw Bandwidth detected 47 */ 48 void lc3_bwdet_put_bw(lc3_bits_t *bits, 49 enum lc3_srate sr, enum lc3_bandwidth bw); 50 51 /** 52 * Get bandwidth indication 53 * bits Bitstream context 54 * sr Samplerate of the frame 55 * bw Return bandwidth indication 56 * return 0: Ok -1: Invalid bandwidth indication 57 */ 58 int lc3_bwdet_get_bw(lc3_bits_t *bits, 59 enum lc3_srate sr, enum lc3_bandwidth *bw); 60 61 62 #endif /* __LC3_BWDET_H */ 63
