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// Copyright (C) 2014 Robin Burchell <robin.burchell@viroteck.net>
// Copyright (C) 2016 The Qt Company Ltd.
// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
#include "qoscmessage_p.h"
#include "qtuio_p.h"
#include <QDebug>
#include <QtEndian>
#include <QLoggingCategory>
QT_BEGIN_NAMESPACE
Q_LOGGING_CATEGORY(lcTuioMessage, "qt.qpa.tuio.message")
QOscMessage::QOscMessage() {}
// TUIO packets are transmitted using the OSC protocol, located at:
// http://opensoundcontrol.org/specification
// Snippets of this specification have been pasted into the source as a means of
// easily communicating requirements.
QOscMessage::QOscMessage(const QByteArray &data)
: m_isValid(false)
{
qCDebug(lcTuioMessage) << data.toHex();
quint32 parsedBytes = 0;
// "An OSC message consists of an OSC Address Pattern"
QByteArray addressPattern;
if (!qt_readOscString(data, addressPattern, parsedBytes) || addressPattern.size() == 0)
return;
// "followed by an OSC Type Tag String"
QByteArray typeTagString;
if (!qt_readOscString(data, typeTagString, parsedBytes))
return;
// "Note: some older implementations of OSC may omit the OSC Type Tag string.
// Until all such implementations are updated, OSC implementations should be
// robust in the case of a missing OSC Type Tag String."
//
// (although, the editor notes one may question how exactly the hell one is
// supposed to be robust when the behavior is unspecified.)
if (typeTagString.size() == 0 || typeTagString.at(0) != ',')
return;
QList<QVariant> arguments;
// "followed by zero or more OSC Arguments."
for (int i = 1; i < typeTagString.size(); ++i) {
char typeTag = typeTagString.at(i);
if (typeTag == 's') { // osc-string
QByteArray aString;
if (!qt_readOscString(data, aString, parsedBytes))
return;
arguments.append(aString);
} else if (typeTag == 'i') { // int32
if (parsedBytes > (quint32)data.size() || data.size() - parsedBytes < qsizetype(sizeof(quint32)))
return;
quint32 anInt = qFromBigEndian<quint32>(data.constData() + parsedBytes);
parsedBytes += sizeof(quint32);
// TODO: is int32 in OSC signed, or unsigned?
arguments.append((int)anInt);
} else if (typeTag == 'f') { // float32
if (parsedBytes > (quint32)data.size() || data.size() - parsedBytes < qsizetype(sizeof(quint32)))
return;
static_assert(sizeof(float) == sizeof(quint32));
union {
quint32 u;
float f;
} value;
value.u = qFromBigEndian<quint32>(data.constData() + parsedBytes);
parsedBytes += sizeof(quint32);
arguments.append(value.f);
} else {
qCWarning(lcTuioMessage) << "Reading argument of unknown type " << typeTag;
return;
}
}
m_isValid = true;
m_addressPattern = addressPattern;
m_arguments = arguments;
qCDebug(lcTuioMessage) << "Message with address pattern: " << addressPattern << " arguments: " << arguments;
}
QT_END_NAMESPACE
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