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      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 <map>
     20 #include <memory>
     21 
     22 #include "avrcp.h"
     23 #include "connection_handler.h"
     24 #include "osi/include/properties.h"
     25 #include "raw_address.h"
     26 
     27 namespace bluetooth {
     28 namespace avrcp {
     29 
     30 /**
     31  * AvrcpService is the management interface for AVRCP Target. It handles any
     32  * required thread switching, interface registration, and provides an API
     33  * for connecting and disconnecting devices.
     34  * TODO (apanicke): Instead of providing a service interface implementation,
     35  * have the AvrcpService itself be its interface so we don't have to access
     36  * it indirectly.
     37  */
     38 class AvrcpService : public MediaCallbacks {
     39  public:
     40   /**
     41    * Gets a handle to the AvrcpService
     42    *
     43    * Currently used by A2DP to tell AVRCP to initiate a connection to the
     44    * remote device.
     45    */
     46   static AvrcpService* Get();
     47 
     48   /**
     49    * Returns an interface to control this service. The Avrcp::ServiceInterface
     50    * handles all thread switching between the caller thread and the thread the
     51    * service runs on, that way whoever uses the interface doesn't need to be
     52    * aware which thread the service runs on.
     53    */
     54   static ServiceInterface* GetServiceInterface();
     55 
     56   void Init(MediaInterface* media_interface, VolumeInterface* volume_interface);
     57   void Cleanup();
     58 
     59   void ConnectDevice(const RawAddress& bdaddr);
     60   void DisconnectDevice(const RawAddress& bdaddr);
     61 
     62   // Functions inherited from MediaCallbacks in order to receive updates
     63   void SendMediaUpdate(bool track_changed, bool play_state,
     64                        bool queue) override;
     65   void SendFolderUpdate(bool available_players, bool addressed_player,
     66                         bool queue) override;
     67   void SendActiveDeviceChanged(const RawAddress& address) override;
     68 
     69   class ServiceInterfaceImpl : public ServiceInterface {
     70    public:
     71     void Init(MediaInterface* media_interface,
     72               VolumeInterface* volume_interface) override;
     73     bool ConnectDevice(const RawAddress& bdaddr) override;
     74     bool DisconnectDevice(const RawAddress& bdaddr) override;
     75     bool Cleanup() override;
     76 
     77    private:
     78     std::mutex service_interface_lock_;
     79   };
     80 
     81   static void DebugDump(int fd);
     82 
     83  protected:
     84   void DeviceCallback(std::shared_ptr<Device> device);
     85 
     86  private:
     87   static AvrcpService* instance_;
     88   static ServiceInterfaceImpl* service_interface_;
     89 
     90   MediaInterface* media_interface_ = nullptr;
     91   VolumeInterface* volume_interface_ = nullptr;
     92 
     93   ConnectionHandler* connection_handler_;
     94 };
     95 
     96 }  // namespace avrcp
     97 }  // namespace bluetooth
     98 
     99 inline bool is_new_avrcp_enabled() {
    100   return osi_property_get_bool("persist.bluetooth.enablenewavrcp", true);
    101 }