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"

namespace WebCore {

PassRefPtr<MIDIInput> MIDIInput::create(MIDIAccess* access, ExecutionContext* context, const String& id, const String& manufacturer, const String& name, const String& version)
{
    ASSERT(access);
    RefPtr<MIDIInput> input = adoptRef(new MIDIInput(access, context, id, manufacturer, name, version));
    input->suspendIfNeeded();
    return input.release();
}

MIDIInput::MIDIInput(MIDIAccess* access, ExecutionContext* context, const String& id, const String& manufacturer, const String& name, const String& version)
    : MIDIPort(context, id, manufacturer, name, MIDIPortTypeInput, version)
    , m_access(access)
{
    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 && !m_access->sysExEnabled())
        return;
    RefPtr<Uint8Array> array = Uint8Array::create(data, length);
    dispatchEvent(MIDIMessageEvent::create(timeStamp, array));
}

} // namespace WebCore