Web MIDI: make MidiManagerMac notify device connections

media/midi/midi_manager.h

 // Copyright (c) 2013 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 MEDIA_MIDI_MIDI_MANAGER_H_
 #define MEDIA_MIDI_MIDI_MANAGER_H_
 
 #include <set>
 #include <vector>
 
@@ skipping 17 matching lines @@
 class MEDIA_EXPORT MidiManagerClient {
  public:
   virtual ~MidiManagerClient() {}
 
   // AddInputPort() and AddOutputPort() are called before CompleteStartSession()
   // is called to notify existing MIDI ports, and also called after that to
   // notify new MIDI ports are added.
   virtual void AddInputPort(const MidiPortInfo& info) = 0;
   virtual void AddOutputPort(const MidiPortInfo& info) = 0;
 
-  // TODO(toyoshim): DisableInputPort(const MidiPortInfo& info) and
-  // DisableOutputPort(const MidiPortInfo& info) should be added.
-  // On DisableInputPort(), internal states, e.g. received_messages_queues in
-  // MidiHost, should be reset.
+  // SetInputPortState() and SetOutputPortState() are called to notify a known
+  // device gets disconnected, or connected again.
+  virtual void SetInputPortState(uint32 port_index, MidiPortState state) = 0;
+  virtual void SetOutputPortState(uint32 port_index, MidiPortState state) = 0;
 
   // CompleteStartSession() is called when platform dependent preparation is
   // finished.
   virtual void CompleteStartSession(MidiResult result) = 0;
 
   // ReceiveMidiData() is called when MIDI data has been received from the
   // MIDI system.
   // |port_index| represents the specific input port from input_ports().
   // |data| represents a series of bytes encoding one or more MIDI messages.
   // |length| is the number of bytes in |data|.
@@ skipping 63 matching lines @@
   virtual void StartInitialization();
 
   // Called from a platform dependent implementation of StartInitialization().
   // It invokes CompleteInitializationInternal() on the thread that calls
   // StartSession() and distributes |result| to MIDIManagerClient objects in
   // |pending_clients_|.
   void CompleteInitialization(MidiResult result);
 
   void AddInputPort(const MidiPortInfo& info);
   void AddOutputPort(const MidiPortInfo& info);
+  void SetInputPortState(uint32 port_index, MidiPortState state);
+  void SetOutputPortState(uint32 port_index, MidiPortState state);
 
   // Dispatches to all clients.
   // TODO(toyoshim): Fix the mac implementation to use
   // |ReceiveMidiData(..., base::TimeTicks)|.
   void ReceiveMidiData(uint32 port_index,
                        const uint8* data,
                        size_t length,
                        double timestamp);
 
   void ReceiveMidiData(uint32 port_index,
@@ skipping 38 matching lines @@
   // Protects access to |clients_|, |pending_clients_|, |initialized_|,
   // |result_|, |input_ports_| and |output_ports_|.
   base::Lock lock_;
 
   DISALLOW_COPY_AND_ASSIGN(MidiManager);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_MIDI_MIDI_MANAGER_H_