1 /*
2  * Copyright (c) 2021-2021 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 HISTREAMER_AAC_AUDIO_CONFIG_PARSER_H
17 #define HISTREAMER_AAC_AUDIO_CONFIG_PARSER_H
18 
19 #include <cstdint>
20 #include <string>
21 #include "bit_reader.h"
22 #include "plugin/common/plugin_audio_tags.h"
23 
24 namespace OHOS {
25 namespace Media {
26 namespace Plugin {
27 namespace Ffmpeg {
28 class AACAudioConfigParser final {
29 public:
30     AACAudioConfigParser(const uint8_t* audioConfig, size_t len);
31 
32     ~AACAudioConfigParser() = default;
33 
34     bool ParseConfigs();
35 
36     uint32_t GetLevel() const;
37 
38     AudioAacProfile GetProfile() const;
39 
40 private:
41     struct AudioSpecificConfig {
42         uint8_t audioObjectType {0xFF};
43         uint8_t channelConfig {0xFF};
44         uint32_t sampleRate {0};
45         uint32_t level {0};
46         AudioAacProfile profile {AudioAacProfile::NONE};
47     };
48 
49     void Reset();
50 
51     bool ParseObjectType();
52 
53     bool ParseSampleRate();
54 
55     bool ParseChannel();
56 
57     bool ParseObjectTypeFull();
58 
59     bool ExtractChannelElements(int& sceCnt, int& cpeCnt, int& lfeCnt, int& indepCce, int& depCce);
60 
61     bool ExtractReferencePRCU(int& refPcu, int& refRcu);
62 
63     bool CalculateProfile(int channelCnt, int pcu, int rcu);
64 
65     bool ParseLevel();
66 
67     bool ParseProfile();
68 
69     BitReader bitReader_;
70     bool isConfigValid_;
71     AudioSpecificConfig audioConfig_;
72 };
73 } // namespace Ffmpeg
74 } // namespace Plugin
75 } // namespace Media
76 } // namespace OHOS
77 #endif // HISTREAMER_AAC_AUDIO_CONFIG_PARSER_H
78