1/*
2 * Copyright (C) 2013 Google Inc. All rights reserved.
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions are
6 * met:
7 *
8 *     * Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 *     * Redistributions in binary form must reproduce the above
11 * copyright notice, this list of conditions and the following disclaimer
12 * in the documentation and/or other materials provided with the
13 * distribution.
14 *     * Neither the name of Google Inc. nor the names of its
15 * contributors may be used to endorse or promote products derived from
16 * this software without specific prior written permission.
17 *
18 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
19 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
20 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
21 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
22 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
23 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
24 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
25 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
26 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
28 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 */
30
31#include "config.h"
32#include "modules/webmidi/MIDIInput.h"
33
34#include "modules/webmidi/MIDIAccess.h"
35#include "modules/webmidi/MIDIMessageEvent.h"
36#include "platform/heap/Handle.h"
37
38namespace blink {
39
40MIDIInput* MIDIInput::create(MIDIAccess* access, const String& id, const String& manufacturer, const String& name, const String& version)
41{
42    ASSERT(access);
43    return adoptRefCountedGarbageCollectedWillBeNoop(new MIDIInput(access, id, manufacturer, name, version));
44}
45
46MIDIInput::MIDIInput(MIDIAccess* access, const String& id, const String& manufacturer, const String& name, const String& version)
47    : MIDIPort(access, id, manufacturer, name, MIDIPortTypeInput, version)
48{
49}
50
51void MIDIInput::didReceiveMIDIData(unsigned portIndex, const unsigned char* data, size_t length, double timeStamp)
52{
53    ASSERT(isMainThread());
54
55    if (!length)
56        return;
57
58    // Drop sysex message here when the client does not request it. Note that this is not a security check but an
59    // automatic filtering for clients that do not want sysex message. Also note that sysex message will never be sent
60    // unless the current process has an explicit permission to handle sysex message.
61    if (data[0] == 0xf0 && !midiAccess()->sysexEnabled())
62        return;
63    RefPtr<Uint8Array> array = Uint8Array::create(data, length);
64    dispatchEvent(MIDIMessageEvent::create(timeStamp, array));
65}
66
67void MIDIInput::trace(Visitor* visitor)
68{
69    MIDIPort::trace(visitor);
70}
71
72} // namespace blink
73