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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 *     * Redistributions in binary form must reproduce the above
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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.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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#ifndef MIDIAccessor_h
#define MIDIAccessor_h

#include "public/platform/WebMIDIAccessor.h"
#include "public/platform/WebMIDIAccessorClient.h"
#include "wtf/Allocator.h"
#include "wtf/OwnPtr.h"
#include "wtf/PassOwnPtr.h"

namespace blink {

class MIDIAccessorClient;

class MIDIAccessor final : public WebMIDIAccessorClient {
    USING_FAST_MALLOC(MIDIAccessor);
public:
    static PassOwnPtr<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;
    OwnPtr<WebMIDIAccessor> m_accessor;
};

} // namespace blink

#endif // MIDIAccessor_h