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 /**
20  * LC3 - Energy estimation per band
21  *
22  * Reference : Low Complexity Communication Codec (LC3)
23  *             Bluetooth Specification v1.0
24  */
25 
26 #ifndef __LC3_ENERGY_H
27 #define __LC3_ENERGY_H
28 
29 #include "common.h"
30 
31 
32 /**
33  * Energy estimation per band
34  * dt, sr          Duration and samplerate of the frame
35  * x               Input MDCT coefficient
36  * e               Energy estimation per bands
37  * return          True when high energy detected near Nyquist frequency
38  */
39 bool lc3_energy_compute(
40     enum lc3_dt dt, enum lc3_srate sr, const float *x, float *e);
41 
42 
43 #endif /* __LC3_ENERGY_H */
44