text: /*
   * Copyright (C) 2013 Google Inc. All rights reserved.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions are
   * met:
   *
   *     * Redistributions of source code must retain the above copyright
   * 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
   * distribution.
   *     * Neither the name of Google Inc. nor the names of its
   * contributors may be used to endorse or promote products derived from
   * this software without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
   * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
   * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
   * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
   * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
   * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
   * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
   * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   */
  
  #ifndef MIDIAccessor_h
  #define MIDIAccessor_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, MIDIPortState) override;
      void didAddOutputPort(const WebString& id, const WebString& manufacturer, const WebString& name, const WebString& version, MIDIPortState) override;
      void didSetInputPortState(unsigned portIndex, MIDIPortState) override;
      void didSetOutputPortState(unsigned portIndex, MIDIPortState) override;
      void didStartSession(bool success, const WebString& error, const WebString& message) 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
  