1 /*
2  * Copyright (C) 2021 Huawei Device Co., Ltd.
3  * Licensed under the Apache License, Version 2.0 (the "License");
4  * you may not use this file except in compliance with the License.
5  * You may obtain a copy of the License at
6  *
7  *     http://www.apache.org/licenses/LICENSE-2.0
8  *
9  * Unless required by applicable law or agreed to in writing, software
10  * distributed under the License is distributed on an "AS IS" BASIS,
11  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12  * See the License for the specific language governing permissions and
13  * limitations under the License.
14  */
15 
16 #ifndef SBC_DECODER_H
17 #define SBC_DECODER_H
18 
19 #include <cstddef>
20 #include <cstdint>
21 #include <sys/types.h>
22 #include "sbc_codec.h"
23 #include "sbc_constant.h"
24 #include "sbc_frame.h"
25 
26 namespace sbc {
27 class Decoder: public IDecoderBase {
28 public:
29     explicit Decoder();
30     ~Decoder() override = default;
31     ssize_t SBCDecode(const CodecParam& codecParam, const uint8_t* in, size_t iLength,
32         uint8_t* out, size_t oLength, size_t* written) override;
33 private:
34     void Init(const Frame& frame);
35     int Synthesize(const Frame& frame);
36     void Synthesize4(const Frame &frame, int ch, int blk);
37     void Synthesize8(const Frame &frame, int ch, int blk);
38 
39     int32_t v_[2][170] {};
40     int offset_[2][16] {};
41     int16_t pcmSamples_[2][16 * 8] {};
42     bool initialized_ {};
43     Frame frame_ {};
44 };
45 } // namespace sbc
46 #endif // SBC_DECODER_H
47