device/bluetooth:Implement BluetoothMediaEndpointServiceProvider delegate and media-related overrid…

device/bluetooth/bluetooth_audio_sink_chromeos.h

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef DEVICE_BLUETOOTH_BLUETOOTH_AUDIO_SINK_CHROMEOS_H_
 #define DEVICE_BLUETOOTH_BLUETOOTH_AUDIO_SINK_CHROMEOS_H_
 
 #include <stdint.h>
 #include <string>
 #include <vector>
 
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "base/observer_list.h"
 #include "chromeos/dbus/bluetooth_media_client.h"
 #include "chromeos/dbus/bluetooth_media_endpoint_service_provider.h"
 #include "chromeos/dbus/bluetooth_media_transport_client.h"
 #include "dbus/file_descriptor.h"
 #include "dbus/object_path.h"
 #include "device/bluetooth/bluetooth_adapter.h"
 #include "device/bluetooth/bluetooth_audio_sink.h"
 #include "device/bluetooth/bluetooth_export.h"
 
 namespace chromeos {
 
+class BluetoothAudioSinkChromeOSTest;
+
 class DEVICE_BLUETOOTH_EXPORT BluetoothAudioSinkChromeOS
     : public device::BluetoothAudioSink,
       public device::BluetoothAdapter::Observer,
       public BluetoothMediaClient::Observer,
       public BluetoothMediaTransportClient::Observer,
       public BluetoothMediaEndpointServiceProvider::Delegate {
  public:
   explicit BluetoothAudioSinkChromeOS(
       scoped_refptr<device::BluetoothAdapter> adapter);
 
   // device::BluetoothAudioSink overrides.
+  // Unregisters a BluetoothAudioSink. |callback| should handle
+  // the clean-up after the audio sink is deleted successfully, otherwise
+  // |error_callback| will be called.
+  void Unregister(
+      const base::Closure& callback,
+      const device::BluetoothAudioSink::ErrorCallback& error_callback) override;
   void AddObserver(BluetoothAudioSink::Observer* observer) override;
   void RemoveObserver(BluetoothAudioSink::Observer* observer) override;
   device::BluetoothAudioSink::State GetState() const override;
   uint16_t GetVolume() const override;
 
   // device::BluetoothAdapter::Observer overrides.
   void AdapterPresentChanged(device::BluetoothAdapter* adapter,
                              bool present) override;
 
   // BluetoothMediaClient::Observer overrides.
   void MediaRemoved(const dbus::ObjectPath& object_path) override;
 
   // BluetoothMediaTransportClient::Observer overrides.
   void MediaTransportRemoved(const dbus::ObjectPath& object_path) override;
   void MediaTransportPropertyChanged(const dbus::ObjectPath& object_path,
                                      const std::string& property_name) override;
 
   // BluetoothMediaEndpointServiceProvider::Delegate overrides.
   void SetConfiguration(const dbus::ObjectPath& transport_path,
-                        const dbus::MessageReader& properties) override;
+                        const TransportProperties& properties) override;
   void SelectConfiguration(
       const std::vector<uint8_t>& capabilities,
       const SelectConfigurationCallback& callback) override;
   void ClearConfiguration(const dbus::ObjectPath& transport_path) override;
-  void Release() override;
+  void Released() override;
 
   // Registers a BluetoothAudioSink. User applications can use |options| to
   // configure the audio sink. |callback| will be executed if the audio sink is
   // successfully registered, otherwise |error_callback| will be called. Called
   // by BluetoothAdapterChromeOS.
   void Register(
       const device::BluetoothAudioSink::Options& options,
       const base::Closure& callback,
       const device::BluetoothAudioSink::ErrorCallback& error_callback);
 
-  // Unregisters a BluetoothAudioSink. |callback| should handle
-  // the clean-up after the audio sink is deleted successfully, otherwise
-  // |error_callback| will be called.
-  void Unregister(
-      const base::Closure& callback,
-      const device::BluetoothAudioSink::ErrorCallback& error_callback) override;
+  // Returns a pointer to the media endpoint object. This function should be
+  // used for testing purpose only.
+  BluetoothMediaEndpointServiceProvider* GetEndpointServiceProvider();
 
  private:
   ~BluetoothAudioSinkChromeOS() override;
 
   // Called when the state property of BluetoothMediaTransport has been updated.
   void StateChanged(device::BluetoothAudioSink::State state);
 
   // Called when the volume property of BluetoothMediaTransport has been
   // updated.
   void VolumeChanged(uint16_t volume);
 
   // Called when the registration of Media Endpoint has succeeded.
   void OnRegisterSucceeded(const base::Closure& callback);
 
   // Called when the registration of Media Endpoint failed.
   void OnRegisterFailed(const BluetoothAudioSink::ErrorCallback& error_callback,
                         const std::string& error_name,
                         const std::string& error_message);
 
   // Reads from the file descriptor acquired via Media Transport object and
   // notify |observer_| while the audio data is available.
   void ReadFromFD();
 
+  // Helper functions to clean up media, media transport and media endpoint.
+  // Called when the |state_| changes to either STATE_INVALID or
+  // STATE_DISCONNECTED.
+  void ResetMedia();
+  void ResetTransport();
+  void ResetEndpoint();
+
   // The connection state between the BluetoothAudioSinkChromeOS and the remote
   // device.
   device::BluetoothAudioSink::State state_;
 
   // The volume control by the remote device during the streaming.
   uint16_t volume_;
 
   // Read MTU of the file descriptor acquired via Media Transport object.
   uint16_t read_mtu_;
 
@@ skipping 30 matching lines @@
   // Note: This should remain the last member so it'll be destroyed and
   // invalidate its weak pointers before any other members are destroyed.
   base::WeakPtrFactory<BluetoothAudioSinkChromeOS> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(BluetoothAudioSinkChromeOS);
 };
 
 }  // namespace chromeos
 
 #endif  // DEVICE_BLUETOOTH_BLUETOOTH_AUDIO_SINK_CHROMEOS_H_