1 /**
2  * Copyright (C) 2022 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 /*------------------------------------------------------------------------------
17  *
18  *  Function to calculate a quantised representation of an input
19  *  difference signal, based on additional dither values and step-size inputs.
20  *
21  *-----------------------------------------------------------------------------*/
22 
23 #ifndef QUANTISER_H
24 #define QUANTISER_H
25 #ifdef _GCC
26 #pragma GCC visibility push(hidden)
27 #endif
28 
29 #include "AptxParameters.h"
30 
31 void quantiseDifferenceLL(const int32_t diffSignal, const int32_t ditherVal,
32                           const int32_t delta, Quantiser_data* qdata_pt);
33 void quantiseDifferenceHL(const int32_t diffSignal, const int32_t ditherVal,
34                           const int32_t delta, Quantiser_data* qdata_pt);
35 void quantiseDifferenceLH(const int32_t diffSignal, const int32_t ditherVal,
36                           const int32_t delta, Quantiser_data* qdata_pt);
37 void quantiseDifferenceHH(const int32_t diffSignal, const int32_t ditherVal,
38                           const int32_t delta, Quantiser_data* qdata_pt);
39 
40 #ifdef _GCC
41 #pragma GCC visibility pop
42 #endif
43 #endif  // QUANTISER_H
44