third_party/blink/renderer/modules/webmidi/midi_accessor.h

/*
 * Copyright (C) 2013 Google Inc. All rights reserved.
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 * in the documentation and/or other materials provided with the
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 * this software without specific prior written permission.
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 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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#ifndef THIRD_PARTY_BLINK_RENDERER_MODULES_WEBMIDI_MIDI_ACCESSOR_H_
#define THIRD_PARTY_BLINK_RENDERER_MODULES_WEBMIDI_MIDI_ACCESSOR_H_

#include <memory>
#include "base/time/time.h"
#include "media/midi/midi_service.mojom-blink.h"
#include "third_party/blink/renderer/modules/webmidi/midi_dispatcher.h"
#include "third_party/blink/renderer/platform/wtf/allocator.h"

namespace blink {

class MIDIAccessorClient;

// TODO(https://crbug.com/582328): Remove this class, and call MIDIDispatcher
// directly.
class MIDIAccessor final {
  USING_FAST_MALLOC(MIDIAccessor);

 public:
  static std::unique_ptr<MIDIAccessor> Create(MIDIAccessorClient*);
  ~MIDIAccessor();

  void StartSession();
  void SendMIDIData(unsigned port_index,
                    const unsigned char* data,
                    size_t length,
                    base::TimeTicks time_stamp);
  // MIDIAccessInitializer and MIDIAccess are both MIDIAccessClient.
  // MIDIAccessInitializer is the first client and MIDIAccess takes over it
  // once the initialization successfully finishes.
  void SetClient(MIDIAccessorClient* client) { client_ = client; }

  // The following methods are used by MIDIDispatcher to forward messages from
  // the browser process.
  void DidAddInputPort(const String& id,
                       const String& manufacturer,
                       const String& name,
                       const String& version,
                       midi::mojom::PortState);
  void DidAddOutputPort(const String& id,
                        const String& manufacturer,
                        const String& name,
                        const String& version,
                        midi::mojom::PortState);
  void DidSetInputPortState(unsigned port_index, midi::mojom::PortState);
  void DidSetOutputPortState(unsigned port_index, midi::mojom::PortState);
  void DidStartSession(midi::mojom::Result);
  void DidReceiveMIDIData(unsigned port_index,
                          const unsigned char* data,
                          size_t length,
                          base::TimeTicks time_stamp);

 private:
  explicit MIDIAccessor(MIDIAccessorClient*);

  MIDIAccessorClient* client_;
  bool called_start_session_ = false;
};

}  // namespace blink

#endif  // THIRD_PARTY_BLINK_RENDERER_MODULES_WEBMIDI_MIDI_ACCESSOR_H_