Refactor DBusThreadManager to split away BT clients.

chromeos/dbus/bluetooth_media_transport_client.h

-// Copyright 2014 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 CHROMEOS_DBUS_BLUETOOTH_MEDIA_TRANSPORT_CLIENT_H_
-#define CHROMEOS_DBUS_BLUETOOTH_MEDIA_TRANSPORT_CLIENT_H_
-
-#include <string>
-#include <vector>
-
-#include "base/callback.h"
-#include "chromeos/chromeos_export.h"
-#include "chromeos/dbus/dbus_client.h"
-#include "dbus/file_descriptor.h"
-#include "dbus/object_path.h"
-#include "dbus/property.h"
-
-namespace chromeos {
-
-class CHROMEOS_EXPORT BluetoothMediaTransportClient : public DBusClient {
- public:
-  struct Properties : public dbus::PropertySet {
-    // The path to the device object which the transport is connected to.
-    // Read-only.
-    dbus::Property<dbus::ObjectPath> device;
-
-    // UUID of the profile which the transport is for. Read-only.
-    dbus::Property<std::string> uuid;
-
-    // Assigned codec value supported by the media transport. Read-only.
-    dbus::Property<uint8_t> codec;
-
-    // The configuration used by the media transport. Read-only.
-    dbus::Property<std::vector<uint8_t>> configuration;
-
-    // The state of the transport. Read-only.
-    // The values can be one of the following:
-    // "idle": not streaming
-    // "pending": streaming but not acquired
-    // "active": streaming and acquired
-    dbus::Property<std::string> state;
-
-    // The unit of transport delay is in 1/10 of millisecond. This property is
-    // only writeable when the transport was aquired by the sender. Optional.
-    dbus::Property<uint16_t> delay;
-
-    // The volume level of the transport. This property is only writable when
-    // the transport was aquired by the sender. Optional.
-    dbus::Property<uint16_t> volume;
-
-    Properties(dbus::ObjectProxy* object_proxy,
-               const std::string& interface_name,
-               const PropertyChangedCallback& callback);
-    ~Properties() override;
-  };
-
-  class Observer {
-   public:
-    virtual ~Observer() {}
-
-    // Called when the Media Transport with object path |object_path| is added
-    // to the system.
-    virtual void MediaTransportAdded(const dbus::ObjectPath& object_path) {}
-
-    // Called when the Media Transport with object path |object_path| is removed
-    // from the system.
-    virtual void MediaTransportRemoved(const dbus::ObjectPath& object_path) {}
-
-    // Called when the Media Transport with object path |object_path| has
-    // a change in the value of the property with name |property_name|.
-    virtual void MediaTransportPropertyChanged(
-        const dbus::ObjectPath& object_path,
-        const std::string& property_name) {}
-  };
-
-  // TODO(mcchou): Move all static constants to service_constants.h.
-  // Constants used for the names of Media Transport's properties.
-  static const char kDeviceProperty[];
-  static const char kUUIDProperty[];
-  static const char kCodecProperty[];
-  static const char kConfigurationProperty[];
-  static const char kStateProperty[];
-  static const char kDelayProperty[];
-  static const char kVolumeProperty[];
-
-  // All possible states of a valid media transport object.
-  static const char kStateIdle[];
-  static const char kStatePending[];
-  static const char kStateActive[];
-
-  ~BluetoothMediaTransportClient() override;
-
-  // The ErrorCallback is used by media transport API methods to indicate
-  // failure. It receives two arguments: the name of the error in |error_name|
-  // and an optional message in |error_message|.
-  typedef base::Callback<void(const std::string& error_name,
-                              const std::string& error_message)> ErrorCallback;
-
-  // The AcquireCallback is used by |Acquire| method of media tansport API tp
-  // indicate the success of the method.
-  typedef base::Callback<void(dbus::FileDescriptor* fd,
-                              const uint16_t read_mtu,
-                              const uint16_t write_mtu)> AcquireCallback;
-
-  // Adds and removes observers for events on all remote Media Transports. Check
-  // the |object_path| parameter of observer methods to determine which Media
-  // Transport is issuing the event.
-  virtual void AddObserver(Observer* observer) = 0;
-  virtual void RemoveObserver(Observer* observer) = 0;
-
-  virtual Properties* GetProperties(const dbus::ObjectPath& object_path) = 0;
-
-  // Acquires transport file descriptor and the MTU for read and write.
-  virtual void Acquire(const dbus::ObjectPath& object_path,
-                       const AcquireCallback& callback,
-                       const ErrorCallback& error_callback) = 0;
-
-  // Acquires transport file descriptor only if the transport is in "pending"
-  // state at the time the message is received by BlueZ. Otherwise no request
-  // will be sent to the remote device and the function will just fail with
-  // org.bluez.Error.NotAvailable.
-  virtual void TryAcquire(const dbus::ObjectPath& object_path,
-                          const AcquireCallback& callback,
-                          const ErrorCallback& error_callback) = 0;
-
-  // Releases the file descriptor of the transport.
-  virtual void Release(const dbus::ObjectPath& object_path,
-                       const base::Closure& callback,
-                       const ErrorCallback& error_callback) = 0;
-
-  static BluetoothMediaTransportClient* Create();
-
- protected:
-  BluetoothMediaTransportClient();
-
- private:
-  DISALLOW_COPY_AND_ASSIGN(BluetoothMediaTransportClient);
-};
-
-}  // namespace chromeos
-
-#endif  // CHROMEOS_DBUS_BLUETOOTH_MEDIA_TRANSPORT_CLIENT_H_