1 /*
2  * Copyright 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 #pragma once
18 
19 #include <android/hardware/bluetooth/audio/2.1/types.h>
20 #include "BluetoothAudioSession.h"
21 
22 #include <mutex>
23 #include <unordered_map>
24 
25 namespace android {
26 namespace bluetooth {
27 namespace audio {
28 
29 class BluetoothAudioSession_2_1 {
30  private:
31   std::shared_ptr<BluetoothAudioSession> audio_session;
32 
33   ::android::hardware::bluetooth::audio::V2_1::SessionType session_type_2_1_;
34   ::android::hardware::bluetooth::audio::V2_1::SessionType raw_session_type_;
35 
36   // audio data configuration for both software and offloading
37   ::android::hardware::bluetooth::audio::V2_1::AudioConfiguration
38       audio_config_2_1_;
39 
40   bool UpdateAudioConfig(
41       const ::android::hardware::bluetooth::audio::V2_1::AudioConfiguration&
42           audio_config);
43 
44   static ::android::hardware::bluetooth::audio::V2_1::AudioConfiguration
45       invalidSoftwareAudioConfiguration;
46   static ::android::hardware::bluetooth::audio::V2_1::AudioConfiguration
47       invalidOffloadAudioConfiguration;
48 
49  public:
50   BluetoothAudioSession_2_1(
51       const ::android::hardware::bluetooth::audio::V2_1::SessionType&
52           session_type);
53 
54   std::shared_ptr<BluetoothAudioSession> GetAudioSession();
55 
56   // The report function is used to report that the Bluetooth stack has started
57   // this session without any failure, and will invoke session_changed_cb_ to
58   // notify those registered bluetooth_audio outputs
59   void OnSessionStarted(
60       const sp<IBluetoothAudioPort> stack_iface,
61       const DataMQ::Descriptor* dataMQ,
62       const ::android::hardware::bluetooth::audio::V2_1::AudioConfiguration&
63           audio_config);
64 
65   // The control function is for the bluetooth_audio module to get the current
66   // AudioConfiguration
67   const ::android::hardware::bluetooth::audio::V2_1::AudioConfiguration
68   GetAudioConfig();
69 
70   static constexpr ::android::hardware::bluetooth::audio::V2_1::
71       AudioConfiguration& kInvalidSoftwareAudioConfiguration =
72           invalidSoftwareAudioConfiguration;
73   static constexpr ::android::hardware::bluetooth::audio::V2_1::
74       AudioConfiguration& kInvalidOffloadAudioConfiguration =
75           invalidOffloadAudioConfiguration;
76 };
77 
78 class BluetoothAudioSessionInstance_2_1 {
79  public:
80   // The API is to fetch the specified session of A2DP / Hearing Aid
81   static std::shared_ptr<BluetoothAudioSession_2_1> GetSessionInstance(
82       const ::android::hardware::bluetooth::audio::V2_1::SessionType&
83           session_type);
84 
85  private:
86   static std::unique_ptr<BluetoothAudioSessionInstance_2_1> instance_ptr;
87   std::mutex mutex_;
88   std::unordered_map<::android::hardware::bluetooth::audio::V2_1::SessionType,
89                      std::shared_ptr<BluetoothAudioSession_2_1>>
90       sessions_map_;
91 };
92 
93 }  // namespace audio
94 }  // namespace bluetooth
95 }  // namespace android
96