Bailey Forrest | 62aa15f | 2017-01-30 17:38:58 -0800 | [diff] [blame] | 1 | // |
| 2 | // Copyright (C) 2017 Google, Inc. |
| 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 <atomic> |
| 20 | #include <mutex> |
| 21 | #include <string> |
| 22 | #include <vector> |
| 23 | |
| 24 | #include <base/macros.h> |
| 25 | |
| 26 | #include "service/bluetooth_instance.h" |
| 27 | #include "service/hal/bluetooth_av_interface.h" |
| 28 | |
| 29 | namespace bluetooth { |
| 30 | |
| 31 | class A2dpSink : public BluetoothInstance, |
| 32 | private hal::BluetoothAvInterface::A2dpSinkObserver { |
| 33 | public: |
| 34 | // We only allow one instance of this object at a time. |
| 35 | static const int kSingletonInstanceId; |
| 36 | |
| 37 | class Delegate { |
| 38 | public: |
| 39 | virtual void OnConnectionState(const std::string& device_address, |
| 40 | int state) = 0; |
| 41 | virtual void OnAudioState(const std::string& device_address, int state) = 0; |
| 42 | virtual void OnAudioConfig(const std::string& device_address, |
| 43 | uint32_t sample_rate, uint8_t channel_count) = 0; |
| 44 | |
| 45 | protected: |
| 46 | virtual ~Delegate() = default; |
| 47 | }; |
| 48 | |
| 49 | ~A2dpSink() override; |
| 50 | |
| 51 | void SetDelegate(Delegate* delegate); |
| 52 | |
| 53 | // BluetoothInstance implementation: |
| 54 | const Uuid& GetAppIdentifier() const override; |
| 55 | int GetInstanceId() const override; |
| 56 | |
| 57 | bool Enable(); |
| 58 | void Disable(); |
| 59 | bool Connect(const std::string& device_address); |
| 60 | bool Disconnect(const std::string& device_address); |
| 61 | void SetAudioFocusState(int focus_state); |
| 62 | void SetAudioTrackGain(float gain); |
| 63 | |
| 64 | private: |
| 65 | friend class A2dpSinkFactory; |
| 66 | |
| 67 | explicit A2dpSink(const Uuid& uuid); |
| 68 | |
| 69 | // hal::bluetooth::hal::BluetoothAvInterface::Observer implementation: |
| 70 | void ConnectionStateCallback(bluetooth::hal::BluetoothAvInterface* iface, |
| 71 | const RawAddress& bd_addr, |
| 72 | btav_connection_state_t state) override; |
| 73 | void AudioStateCallback(bluetooth::hal::BluetoothAvInterface* iface, |
| 74 | const RawAddress& bd_addr, |
| 75 | btav_audio_state_t state) override; |
| 76 | void AudioConfigCallback(bluetooth::hal::BluetoothAvInterface* iface, |
| 77 | const RawAddress& bd_addr, uint32_t sample_rate, |
| 78 | uint8_t channel_count) override; |
| 79 | |
| 80 | // See getters above for documentation. |
| 81 | const Uuid app_identifier_; |
| 82 | |
| 83 | std::mutex mutex_; |
| 84 | std::mutex delegate_mutex_; |
| 85 | Delegate* delegate_ = nullptr; |
| 86 | |
| 87 | DISALLOW_COPY_AND_ASSIGN(A2dpSink); |
| 88 | }; |
| 89 | |
| 90 | class A2dpSinkFactory : public BluetoothInstanceFactory { |
| 91 | public: |
| 92 | A2dpSinkFactory(); |
| 93 | ~A2dpSinkFactory() override; |
| 94 | |
| 95 | // BluetoothInstanceFactory override: |
| 96 | bool RegisterInstance(const Uuid& uuid, |
| 97 | const RegisterCallback& callback) override; |
| 98 | |
| 99 | private: |
| 100 | DISALLOW_COPY_AND_ASSIGN(A2dpSinkFactory); |
| 101 | }; |
| 102 | |
| 103 | } // namespace bluetooth |