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/****************************************************************************
**
** Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/legal
**
** This file is part of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** Commercial License Usage
** Licensees holding valid commercial Qt licenses may use this file in
** accordance with the commercial license agreement provided with the
** Software or, alternatively, in accordance with the terms contained in
** a written agreement between you and Digia. For licensing terms and
** conditions see http://qt.digia.com/licensing. For further information
** use the contact form at http://qt.digia.com/contact-us.
**
** GNU Lesser General Public License Usage
** Alternatively, this file may be used under the terms of the GNU Lesser
** General Public License version 2.1 as published by the Free Software
** Foundation and appearing in the file LICENSE.LGPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU Lesser General Public License version 2.1 requirements
** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Digia gives you certain additional
** rights. These rights are described in the Digia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU
** General Public License version 3.0 as published by the Free Software
** Foundation and appearing in the file LICENSE.GPL included in the
** packaging of this file. Please review the following information to
** ensure the GNU General Public License version 3.0 requirements will be
** met: http://www.gnu.org/copyleft/gpl.html.
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include <QtCore/qmap.h>
#include <QtCore/qtimer.h>
#include <QtCore/qmutex.h>
#include <QtCore/qlist.h>
#include "qgstreamerbushelper_p.h"
QT_BEGIN_NAMESPACE
class QGstreamerBusHelperPrivate : public QObject
{
Q_OBJECT
public:
QGstreamerBusHelperPrivate(QGstreamerBusHelper *parent, GstBus* bus) :
QObject(parent),
m_bus(bus),
m_helper(parent)
{
#ifdef QT_NO_GLIB
Q_UNUSED(bus);
m_intervalTimer = new QTimer(this);
m_intervalTimer->setInterval(250);
connect(m_intervalTimer, SIGNAL(timeout()), SLOT(interval()));
m_intervalTimer->start();
#else
m_tag = gst_bus_add_watch_full(bus, 0, busCallback, this, NULL);
#endif
}
~QGstreamerBusHelperPrivate()
{
m_helper = 0;
#ifdef QT_NO_GLIB
m_intervalTimer->stop();
#else
g_source_remove(m_tag);
#endif
}
GstBus* bus() const { return m_bus; }
private slots:
void interval()
{
GstMessage* message;
while ((message = gst_bus_poll(m_bus, GST_MESSAGE_ANY, 0)) != 0) {
processMessage(message);
gst_message_unref(message);
}
}
private:
void processMessage(GstMessage* message)
{
QGstreamerMessage msg(message);
doProcessMessage(msg);
}
void queueMessage(GstMessage* message)
{
QGstreamerMessage msg(message);
QMetaObject::invokeMethod(this, "doProcessMessage", Qt::QueuedConnection,
Q_ARG(QGstreamerMessage, msg));
}
static gboolean busCallback(GstBus *bus, GstMessage *message, gpointer data)
{
Q_UNUSED(bus);
reinterpret_cast<QGstreamerBusHelperPrivate*>(data)->queueMessage(message);
return TRUE;
}
guint m_tag;
GstBus* m_bus;
QGstreamerBusHelper* m_helper;
QTimer* m_intervalTimer;
private slots:
void doProcessMessage(const QGstreamerMessage& msg)
{
foreach (QGstreamerBusMessageFilter *filter, busFilters) {
if (filter->processBusMessage(msg))
break;
}
emit m_helper->message(msg);
}
public:
QMutex filterMutex;
QList<QGstreamerSyncMessageFilter*> syncFilters;
QList<QGstreamerBusMessageFilter*> busFilters;
};
static GstBusSyncReply syncGstBusFilter(GstBus* bus, GstMessage* message, QGstreamerBusHelperPrivate *d)
{
Q_UNUSED(bus);
QMutexLocker lock(&d->filterMutex);
foreach (QGstreamerSyncMessageFilter *filter, d->syncFilters) {
if (filter->processSyncMessage(QGstreamerMessage(message)))
return GST_BUS_DROP;
}
return GST_BUS_PASS;
}
/*!
\class QGstreamerBusHelper
\internal
*/
QGstreamerBusHelper::QGstreamerBusHelper(GstBus* bus, QObject* parent):
QObject(parent)
{
d = new QGstreamerBusHelperPrivate(this, bus);
gst_bus_set_sync_handler(bus, (GstBusSyncHandler)syncGstBusFilter, d);
gst_object_ref(GST_OBJECT(bus));
}
QGstreamerBusHelper::~QGstreamerBusHelper()
{
gst_bus_set_sync_handler(d->bus(),0,0);
gst_object_unref(GST_OBJECT(d->bus()));
}
void QGstreamerBusHelper::installMessageFilter(QObject *filter)
{
QGstreamerSyncMessageFilter *syncFilter = qobject_cast<QGstreamerSyncMessageFilter*>(filter);
if (syncFilter) {
QMutexLocker lock(&d->filterMutex);
if (!d->syncFilters.contains(syncFilter))
d->syncFilters.append(syncFilter);
}
QGstreamerBusMessageFilter *busFilter = qobject_cast<QGstreamerBusMessageFilter*>(filter);
if (busFilter && !d->busFilters.contains(busFilter))
d->busFilters.append(busFilter);
}
void QGstreamerBusHelper::removeMessageFilter(QObject *filter)
{
QGstreamerSyncMessageFilter *syncFilter = qobject_cast<QGstreamerSyncMessageFilter*>(filter);
if (syncFilter) {
QMutexLocker lock(&d->filterMutex);
d->syncFilters.removeAll(syncFilter);
}
QGstreamerBusMessageFilter *busFilter = qobject_cast<QGstreamerBusMessageFilter*>(filter);
if (busFilter)
d->busFilters.removeAll(busFilter);
}
QT_END_NAMESPACE
#include "qgstreamerbushelper.moc"
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