media/midi/midi_manager_win.h

// Copyright 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_WIN_H_
#define MEDIA_MIDI_MIDI_MANAGER_WIN_H_

#include <vector>

#include "base/basictypes.h"
#include "base/memory/scoped_ptr.h"
#include "base/threading/thread.h"
#include "base/time/time.h"
#include "media/midi/midi_manager.h"

namespace media {
namespace midi {

class MidiServiceWinDelegate {
 public:
  virtual ~MidiServiceWinDelegate() {}
  virtual void OnCompleteInitialization(MidiResult result) = 0;
  virtual void OnAddInputPort(MidiPortInfo info) = 0;
  virtual void OnAddOutputPort(MidiPortInfo info) = 0;
  virtual void OnSetInputPortState(uint32 port_index, MidiPortState state) = 0;
  virtual void OnSetOutputPortState(uint32 port_index, MidiPortState state) = 0;
  virtual void OnReceiveMidiData(uint32 port_index,
                                 const std::vector<uint8>& data,
                                 base::TimeTicks time) = 0;
};

class MidiServiceWin {
 public:
  virtual ~MidiServiceWin() {}
  // This method may return before the initialization is completed.
  virtual void InitializeAsync(MidiServiceWinDelegate* delegate) = 0;
  // This method may return before the specified data is actually sent.
  virtual void SendMidiDataAsync(uint32 port_number,
                                 const std::vector<uint8>& data,
                                 base::TimeTicks time) = 0;
};

class MidiManagerWin final : public MidiManager, public MidiServiceWinDelegate {
 public:
  MidiManagerWin();
  ~MidiManagerWin() override;

  // MidiManager overrides:
  void StartInitialization() final;
  void DispatchSendMidiData(MidiManagerClient* client,
                            uint32 port_index,
                            const std::vector<uint8>& data,
                            double timestamp) final;

  // MidiServiceWinDelegate overrides:
  void OnCompleteInitialization(MidiResult result) final;
  void OnAddInputPort(MidiPortInfo info) final;
  void OnAddOutputPort(MidiPortInfo info) final;
  void OnSetInputPortState(uint32 port_index, MidiPortState state) final;
  void OnSetOutputPortState(uint32 port_index, MidiPortState state) final;
  void OnReceiveMidiData(uint32 port_index,
                         const std::vector<uint8>& data,
                         base::TimeTicks time) final;

 private:
  scoped_ptr<MidiServiceWin> midi_service_;
  DISALLOW_COPY_AND_ASSIGN(MidiManagerWin);
};

}  // namespace midi
}  // namespace media

#endif  // MEDIA_MIDI_MIDI_MANAGER_WIN_H_