| 1 | // Copyright (C) 2024 The Qt Company Ltd. |
|---|---|
| 2 | // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only |
| 3 | |
| 4 | #ifndef QGST_BUS_OBSERVER_P_H |
| 5 | #define QGST_BUS_OBSERVER_P_H |
| 6 | |
| 7 | // |
| 8 | // W A R N I N G |
| 9 | // ------------- |
| 10 | // |
| 11 | // This file is not part of the Qt API. It exists purely as an |
| 12 | // implementation detail. This header file may change from version to |
| 13 | // version without notice, or even be removed. |
| 14 | // |
| 15 | // We mean it. |
| 16 | // |
| 17 | |
| 18 | #include <QtCore/qsocketnotifier.h> |
| 19 | #include <QtCore/qwineventnotifier.h> |
| 20 | #include <QtCore/qmutex.h> |
| 21 | |
| 22 | #include "qgst_p.h" |
| 23 | #include "qgstreamermessage_p.h" |
| 24 | |
| 25 | QT_BEGIN_NAMESPACE |
| 26 | |
| 27 | class QGstreamerBusMessageFilter |
| 28 | { |
| 29 | public: |
| 30 | // returns true if message was processed and should be dropped, false otherwise |
| 31 | virtual bool processBusMessage(const QGstreamerMessage &message) = 0; |
| 32 | }; |
| 33 | |
| 34 | class QGstBusObserver : private QGstBusHandle |
| 35 | { |
| 36 | public: |
| 37 | using QGstBusHandle::get; |
| 38 | using QGstBusHandle::HasRef; |
| 39 | using QGstBusHandle::RefMode; |
| 40 | |
| 41 | explicit QGstBusObserver(QGstBusHandle); |
| 42 | |
| 43 | ~QGstBusObserver(); |
| 44 | QGstBusObserver(const QGstBusObserver &) = delete; |
| 45 | QGstBusObserver(QGstBusObserver &&) = delete; |
| 46 | QGstBusObserver &operator=(const QGstBusObserver &) = delete; |
| 47 | QGstBusObserver &operator=(QGstBusObserver &&) = delete; |
| 48 | |
| 49 | void close(); |
| 50 | |
| 51 | void installMessageFilter(QGstreamerBusMessageFilter *); |
| 52 | void removeMessageFilter(QGstreamerBusMessageFilter *); |
| 53 | |
| 54 | bool processNextPendingMessage(GstMessageType type = GST_MESSAGE_ANY, |
| 55 | std::optional<std::chrono::nanoseconds> timeout = {}); |
| 56 | |
| 57 | bool currentThreadIsNotifierThread() const; |
| 58 | |
| 59 | private: |
| 60 | void processAllPendingMessages(); |
| 61 | |
| 62 | #ifndef Q_OS_WIN |
| 63 | QSocketNotifier m_socketNotifier{ QSocketNotifier::Read }; |
| 64 | #else |
| 65 | QWinEventNotifier m_socketNotifier{}; |
| 66 | #endif |
| 67 | QList<QGstreamerBusMessageFilter *> busFilters; |
| 68 | }; |
| 69 | |
| 70 | QT_END_NAMESPACE |
| 71 | |
| 72 | #endif // QGST_BUS_OBSERVER_P_H |
| 73 |