| 1 | // Copyright (C) 2024 The Qt Company Ltd. |
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| 2 | // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only |
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| 3 | |
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| 4 | #ifndef QGST_BUS_OBSERVER_P_H |
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| 5 | #define QGST_BUS_OBSERVER_P_H |
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| 6 | |
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| 7 | // |
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| 8 | // W A R N I N G |
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| 9 | // ------------- |
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| 10 | // |
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| 11 | // This file is not part of the Qt API. It exists purely as an |
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| 12 | // implementation detail. This header file may change from version to |
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| 13 | // version without notice, or even be removed. |
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| 14 | // |
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| 15 | // We mean it. |
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| 16 | // |
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| 17 | |
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| 18 | #include <QtCore/qsocketnotifier.h> |
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| 19 | #include <QtCore/qwineventnotifier.h> |
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| 20 | #include <QtCore/qmutex.h> |
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| 21 | |
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| 22 | #include "qgst_p.h" |
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| 23 | #include "qgstreamermessage_p.h" |
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| 24 | |
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| 25 | QT_BEGIN_NAMESPACE |
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| 26 | |
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| 27 | class QGstreamerSyncMessageFilter |
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| 28 | { |
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| 29 | public: |
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| 30 | // returns true if message was processed and should be dropped, false otherwise |
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| 31 | virtual bool processSyncMessage(const QGstreamerMessage &message) = 0; |
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| 32 | }; |
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| 33 | |
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| 34 | class QGstreamerBusMessageFilter |
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| 35 | { |
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| 36 | public: |
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| 37 | // returns true if message was processed and should be dropped, false otherwise |
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| 38 | virtual bool processBusMessage(const QGstreamerMessage &message) = 0; |
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| 39 | }; |
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| 40 | |
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| 41 | class QGstBusObserver : private QGstBusHandle |
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| 42 | { |
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| 43 | public: |
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| 44 | using QGstBusHandle::get; |
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| 45 | using QGstBusHandle::HasRef; |
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| 46 | using QGstBusHandle::RefMode; |
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| 47 | |
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| 48 | explicit QGstBusObserver(QGstBusHandle); |
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| 49 | |
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| 50 | ~QGstBusObserver(); |
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| 51 | QGstBusObserver(const QGstBusObserver &) = delete; |
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| 52 | QGstBusObserver(QGstBusObserver &&) = delete; |
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| 53 | QGstBusObserver &operator=(const QGstBusObserver &) = delete; |
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| 54 | QGstBusObserver &operator=(QGstBusObserver &&) = delete; |
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| 55 | |
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| 56 | void close(); |
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| 57 | |
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| 58 | void installMessageFilter(QGstreamerSyncMessageFilter *); |
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| 59 | void removeMessageFilter(QGstreamerSyncMessageFilter *); |
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| 60 | void installMessageFilter(QGstreamerBusMessageFilter *); |
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| 61 | void removeMessageFilter(QGstreamerBusMessageFilter *); |
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| 62 | |
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| 63 | bool processNextPendingMessage(GstMessageType type = GST_MESSAGE_ANY, |
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| 64 | std::optional<std::chrono::nanoseconds> timeout = {}); |
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| 65 | |
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| 66 | bool currentThreadIsNotifierThread() const; |
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| 67 | |
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| 68 | private: |
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| 69 | void processAllPendingMessages(); |
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| 70 | |
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| 71 | static GstBusSyncReply syncGstBusFilter(GstBus *, GstMessage *, QGstBusObserver *); |
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| 72 | |
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| 73 | #ifndef Q_OS_WIN |
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| 74 | QSocketNotifier m_socketNotifier{ QSocketNotifier::Read }; |
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| 75 | #else |
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| 76 | QWinEventNotifier m_socketNotifier{}; |
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| 77 | #endif |
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| 78 | QMutex filterMutex; |
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| 79 | QList<QGstreamerSyncMessageFilter *> syncFilters; |
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| 80 | QList<QGstreamerBusMessageFilter *> busFilters; |
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| 81 | }; |
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| 82 | |
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| 83 | QT_END_NAMESPACE |
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| 84 | |
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| 85 | #endif // QGST_BUS_OBSERVER_P_H |
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| 86 | |
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