third_party/WebKit/Source/modules/webmidi/MIDIAccessor.h

/*
 * Copyright (C) 2013 Google Inc. All rights reserved.
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 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
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 *
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 * notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above
 * copyright notice, this list of conditions and the following disclaimer
 * 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 MIDIAccessor_h
#define MIDIAccessor_h

#include "media/midi/midi_service.mojom-blink.h"
#include "public/platform/modules/webmidi/WebMIDIAccessor.h"
#include "public/platform/modules/webmidi/WebMIDIAccessorClient.h"
#include "wtf/Allocator.h"
#include <memory>

namespace blink {

class MIDIAccessorClient;

class MIDIAccessor final : public WebMIDIAccessorClient {
  USING_FAST_MALLOC(MIDIAccessor);

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

  ~MIDIAccessor() override {}

  void startSession();
  void sendMIDIData(unsigned portIndex,
                    const unsigned char* data,
                    size_t length,
                    double timeStamp);
  // 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) { m_client = client; }

  // WebMIDIAccessorClient
  void didAddInputPort(const WebString& id,
                       const WebString& manufacturer,
                       const WebString& name,
                       const WebString& version,
                       midi::mojom::PortState) override;
  void didAddOutputPort(const WebString& id,
                        const WebString& manufacturer,
                        const WebString& name,
                        const WebString& version,
                        midi::mojom::PortState) override;
  void didSetInputPortState(unsigned portIndex,
                            midi::mojom::PortState) override;
  void didSetOutputPortState(unsigned portIndex,
                             midi::mojom::PortState) override;
  void didStartSession(midi::mojom::Result) override;
  void didReceiveMIDIData(unsigned portIndex,
                          const unsigned char* data,
                          size_t length,
                          double timeStamp) override;

 private:
  explicit MIDIAccessor(MIDIAccessorClient*);

  MIDIAccessorClient* m_client;
  std::unique_ptr<WebMIDIAccessor> m_accessor;
};

}  // namespace blink

#endif  // MIDIAccessor_h