| /**************************************************************************** |
| ** |
| ** Copyright (C) 2016 The Qt Company Ltd. |
| ** Contact: https://www.qt.io/licensing/ |
| ** |
| ** 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 The Qt Company. For licensing terms |
| ** and conditions see https://www.qt.io/terms-conditions. For further |
| ** information use the contact form at https://www.qt.io/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 3 as published by the Free Software |
| ** Foundation and appearing in the file LICENSE.LGPL3 included in the |
| ** packaging of this file. Please review the following information to |
| ** ensure the GNU Lesser General Public License version 3 requirements |
| ** will be met: https://www.gnu.org/licenses/lgpl-3.0.html. |
| ** |
| ** GNU General Public License Usage |
| ** Alternatively, this file may be used under the terms of the GNU |
| ** General Public License version 2.0 or (at your option) the GNU General |
| ** Public license version 3 or any later version approved by the KDE Free |
| ** Qt Foundation. The licenses are as published by the Free Software |
| ** Foundation and appearing in the file LICENSE.GPL2 and LICENSE.GPL3 |
| ** included in the packaging of this file. Please review the following |
| ** information to ensure the GNU General Public License requirements will |
| ** be met: https://www.gnu.org/licenses/gpl-2.0.html and |
| ** https://www.gnu.org/licenses/gpl-3.0.html. |
| ** |
| ** $QT_END_LICENSE$ |
| ** |
| ****************************************************************************/ |
| |
| #include <QtCore/qmap.h> |
| #include <QtCore/qtimer.h> |
| #include <QtCore/qmutex.h> |
| #include <QtCore/qlist.h> |
| #include <QtCore/qabstracteventdispatcher.h> |
| #include <QtCore/qcoreapplication.h> |
| |
| #include "qgstreamerbushelper_p.h" |
| |
| QT_BEGIN_NAMESPACE |
| |
| |
| class QGstreamerBusHelperPrivate : public QObject |
| { |
| Q_OBJECT |
| public: |
| QGstreamerBusHelperPrivate(QGstreamerBusHelper *parent, GstBus* bus) : |
| QObject(parent), |
| m_tag(0), |
| m_bus(bus), |
| m_helper(parent), |
| m_intervalTimer(nullptr) |
| { |
| // glib event loop can be disabled either by env variable or QT_NO_GLIB define, so check the dispacher |
| QAbstractEventDispatcher *dispatcher = QCoreApplication::eventDispatcher(); |
| const bool hasGlib = dispatcher && dispatcher->inherits("QEventDispatcherGlib"); |
| if (!hasGlib) { |
| 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, G_PRIORITY_DEFAULT, busCallback, this, nullptr); |
| } |
| } |
| |
| ~QGstreamerBusHelperPrivate() |
| { |
| m_helper = 0; |
| delete m_intervalTimer; |
| |
| if (m_tag) |
| #if GST_CHECK_VERSION(1, 6, 0) |
| gst_bus_remove_watch(m_bus); |
| #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) |
| { |
| for (QGstreamerBusMessageFilter *filter : qAsConst(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); |
| |
| for (QGstreamerSyncMessageFilter *filter : qAsConst(d->syncFilters)) { |
| if (filter->processSyncMessage(QGstreamerMessage(message))) { |
| gst_message_unref(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); |
| #if GST_CHECK_VERSION(1,0,0) |
| gst_bus_set_sync_handler(bus, (GstBusSyncHandler)syncGstBusFilter, d, 0); |
| #else |
| gst_bus_set_sync_handler(bus, (GstBusSyncHandler)syncGstBusFilter, d); |
| #endif |
| gst_object_ref(GST_OBJECT(bus)); |
| } |
| |
| QGstreamerBusHelper::~QGstreamerBusHelper() |
| { |
| #if GST_CHECK_VERSION(1,0,0) |
| gst_bus_set_sync_handler(d->bus(), 0, 0, 0); |
| #else |
| gst_bus_set_sync_handler(d->bus(),0,0); |
| #endif |
| gst_object_unref(GST_OBJECT(d->bus())); |
| } |
| |
| void QGstreamerBusHelper::installMessageFilter(QObject *filter) |
| { |
| auto syncFilter = qobject_cast<QGstreamerSyncMessageFilter*>(filter); |
| if (syncFilter) { |
| QMutexLocker lock(&d->filterMutex); |
| if (!d->syncFilters.contains(syncFilter)) |
| d->syncFilters.append(syncFilter); |
| } |
| |
| auto busFilter = qobject_cast<QGstreamerBusMessageFilter*>(filter); |
| if (busFilter && !d->busFilters.contains(busFilter)) |
| d->busFilters.append(busFilter); |
| } |
| |
| void QGstreamerBusHelper::removeMessageFilter(QObject *filter) |
| { |
| auto syncFilter = qobject_cast<QGstreamerSyncMessageFilter*>(filter); |
| if (syncFilter) { |
| QMutexLocker lock(&d->filterMutex); |
| d->syncFilters.removeAll(syncFilter); |
| } |
| |
| auto busFilter = qobject_cast<QGstreamerBusMessageFilter*>(filter); |
| if (busFilter) |
| d->busFilters.removeAll(busFilter); |
| } |
| |
| QT_END_NAMESPACE |
| |
| #include "qgstreamerbushelper.moc" |