Source/modules/webmidi/MIDIInput.cpp

/*
 * Copyright (C) 2013 Google Inc. All rights reserved.
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#include "config.h"
#include "modules/webmidi/MIDIInput.h"

#include "modules/webmidi/MIDIAccess.h"
#include "modules/webmidi/MIDIMessageEvent.h"
#include "platform/heap/Handle.h"

namespace blink {

MIDIInput* MIDIInput::create(MIDIAccess* access, const String& id, const String& manufacturer, const String& name, const String& version)
{
    ASSERT(access);
    return adoptRefCountedGarbageCollectedWillBeNoop(new MIDIInput(access, id, manufacturer, name, version));
}

MIDIInput::MIDIInput(MIDIAccess* access, const String& id, const String& manufacturer, const String& name, const String& version)
    : MIDIPort(access, id, manufacturer, name, MIDIPortTypeInput, version)
{
    ScriptWrappable::init(this);
}

void MIDIInput::didReceiveMIDIData(unsigned portIndex, const unsigned char* data, size_t length, double timeStamp)
{
    ASSERT(isMainThread());

    if (!length)
        return;

    // Drop sysex message here when the client does not request it. Note that this is not a security check but an
    // automatic filtering for clients that do not want sysex message. Also note that sysex message will never be sent
    // unless the current process has an explicit permission to handle sysex message.
    if (data[0] == 0xf0 && !midiAccess()->sysexEnabled())
        return;
    RefPtr<Uint8Array> array = Uint8Array::create(data, length);
    dispatchEvent(MIDIMessageEvent::create(timeStamp, array));
}

void MIDIInput::trace(Visitor* visitor)
{
    MIDIPort::trace(visitor);
}

} // namespace blink