| 1 | // Copyright (C) 2022 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 | #ifndef QPLATFORMVIDEODEVICES_H |
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| 4 | #define QPLATFORMVIDEODEVICES_H |
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| 5 | |
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| 6 | // |
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| 7 | // W A R N I N G |
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| 8 | // ------------- |
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| 9 | // |
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| 10 | // This file is not part of the Qt API. It exists purely as an |
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| 11 | // implementation detail. This header file may change from version to |
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| 12 | // version without notice, or even be removed. |
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| 13 | // |
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| 14 | // We mean it. |
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| 15 | // |
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| 16 | |
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| 17 | #include <private/qtmultimediaglobal_p.h> |
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| 18 | #include <qmediarecorder.h> |
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| 19 | #include <qcameradevice.h> |
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| 20 | #include <qobject.h> |
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| 21 | |
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| 22 | #include <private/qcachedvalue_p.h> |
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| 23 | |
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| 24 | QT_BEGIN_NAMESPACE |
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| 25 | |
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| 26 | class QCameraDevice; |
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| 27 | class QPlatformMediaIntegration; |
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| 28 | |
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| 29 | // Implementations should use constructor to setup device-changed notification |
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| 30 | // listeners. Actual device enumeration should happen in findVideoInputs(). |
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| 31 | // This allows device enumeration be deferred until user starts using QMediaDevices |
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| 32 | // functionality. |
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| 33 | class Q_MULTIMEDIA_EXPORT QPlatformVideoDevices : public QObject |
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| 34 | { |
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| 35 | Q_OBJECT |
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| 36 | |
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| 37 | QT_DEFINE_TAG_STRUCT(PrivateTag); |
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| 38 | public: |
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| 39 | QPlatformVideoDevices(QPlatformMediaIntegration *integration); |
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| 40 | |
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| 41 | ~QPlatformVideoDevices() override; |
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| 42 | |
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| 43 | QList<QCameraDevice> videoInputs() const; |
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| 44 | |
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| 45 | protected: |
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| 46 | // Implementation must be thread safe. Can be called from any thread as a result of |
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| 47 | // QMediaDevices::videoInputs(). |
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| 48 | virtual QList<QCameraDevice> findVideoInputs() const = 0; |
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| 49 | |
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| 50 | // Thread-safe. |
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| 51 | // Called by the platform-implementation to signal that findVideoInputs() will return a new list |
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| 52 | // of devices. |
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| 53 | void onVideoInputsChanged(); |
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| 54 | |
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| 55 | // Thread-safe. Called by platform-implementation. |
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| 56 | void updateVideoInputsCache(); |
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| 57 | |
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| 58 | Q_SIGNALS: |
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| 59 | void videoInputsChanged(PrivateTag); |
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| 60 | |
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| 61 | protected: |
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| 62 | QPlatformMediaIntegration *m_integration = nullptr; |
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| 63 | mutable QCachedValue<QList<QCameraDevice>> m_videoInputs; |
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| 64 | }; |
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| 65 | |
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| 66 | QT_END_NAMESPACE |
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| 67 | |
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| 68 | #endif |
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| 69 | |
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