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_PLC_H
20 #define __LC3_PLC_H
21 
22 #include "common.h"
23 
24 
25 /**
26  * Reset PLC state
27  * plc             PLC State to reset
28  */
29 void lc3_plc_reset(lc3_plc_state_t *plc);
30 
31 /**
32  * Suspend PLC synthesis (Error-free frame decoded)
33  * plc             PLC State
34  */
35 void lc3_plc_suspend(lc3_plc_state_t *plc);
36 
37 /**
38  * Synthesis of a PLC frame
39  * dt, sr          Duration and samplerate of the frame
40  * plc             PLC State
41  * x               Last good spectral coefficients
42  * y               Return emulated ones
43  *
44  * `x` and `y` can be the same buffer
45  */
46 void lc3_plc_synthesize(enum lc3_dt dt, enum lc3_srate sr,
47     lc3_plc_state_t *plc, const float *x, float *y);
48 
49 
50 #endif /* __LC3_PLC_H */
51