1 /*
2  * Copyright (C) 2018 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 #pragma once
19 
20 #include <media/AudioCommonTypes.h>
21 #include <system/audio.h>
22 #include <system/audio_policy.h>
23 #include <binder/Parcelable.h>
24 
25 namespace android {
26 
27 class AudioAttributes : public Parcelable
28 {
29 public:
30     AudioAttributes() = default;
AudioAttributes(const audio_attributes_t & attributes)31     AudioAttributes(const audio_attributes_t &attributes) : mAttributes(attributes) {} // NOLINT
AudioAttributes(volume_group_t groupId,audio_stream_type_t stream,const audio_attributes_t & attributes)32     AudioAttributes(volume_group_t groupId,
33                     audio_stream_type_t stream,
34                     const audio_attributes_t &attributes) :
35          mAttributes(attributes), mStreamType(stream), mGroupId(groupId) {}
36 
getAttributes()37     audio_attributes_t getAttributes() const { return mAttributes; }
38 
39     status_t readFromParcel(const Parcel *parcel) override;
40     status_t writeToParcel(Parcel *parcel) const override;
41 
getStreamType()42     audio_stream_type_t getStreamType() const { return mStreamType; }
getGroupId()43     volume_group_t getGroupId() const { return mGroupId; }
44 
45 private:
46     audio_attributes_t mAttributes = AUDIO_ATTRIBUTES_INITIALIZER;
47     /**
48      * @brief mStreamType: for legacy volume management, we need to be able to convert an attribute
49      * to a given stream type.
50      */
51     audio_stream_type_t mStreamType = AUDIO_STREAM_DEFAULT;
52 
53     /**
54      * @brief mGroupId: for future volume management, define groups within a strategy that follows
55      * the same curves of volume (extension of stream types to manage volume)
56      */
57     volume_group_t mGroupId = VOLUME_GROUP_NONE;
58 };
59 
60 } // namespace android
61