1// Copyright (C) 2016 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 QGSTREAMERMEDIACAPTURESESSION_H
5#define QGSTREAMERMEDIACAPTURESESSION_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 <private/qplatformmediacapture_p.h>
19#include <private/qplatformmediaintegration_p.h>
20
21#include <common/qgst_bus_observer_p.h>
22#include <common/qgst_p.h>
23#include <common/qgstpipeline_p.h>
24
25QT_BEGIN_NAMESPACE
26
27class QGstreamerCameraBase;
28class QGstreamerImageCapture;
29class QGstreamerMediaRecorder;
30class QGstreamerAudioInput;
31class QGstreamerAudioOutput;
32class QGstreamerVideoOutput;
33class QGstreamerVideoSink;
34
35class QGstreamerMediaCaptureSession final : public QPlatformMediaCaptureSession,
36 QGstreamerBusMessageFilter
37{
38public:
39 static QMaybe<QPlatformMediaCaptureSession *> create();
40 ~QGstreamerMediaCaptureSession() override;
41
42 QPlatformCamera *camera() override;
43 void setCamera(QPlatformCamera *camera) override;
44
45 QPlatformImageCapture *imageCapture() override;
46 void setImageCapture(QPlatformImageCapture *imageCapture) override;
47
48 QPlatformMediaRecorder *mediaRecorder() override;
49 void setMediaRecorder(QPlatformMediaRecorder *recorder) override;
50
51 void setAudioInput(QPlatformAudioInput *input) override;
52 QGstreamerAudioInput *audioInput() { return gstAudioInput; }
53
54 void setVideoPreview(QVideoSink *sink) override;
55 void setAudioOutput(QPlatformAudioOutput *output) override;
56
57 const QGstPipeline &pipeline() const;
58
59 QGstreamerVideoSink *gstreamerVideoSink() const;
60
61 struct RecorderElements
62 {
63 QGstBin encodeBin;
64 QGstElement fileSink;
65
66 QGstPad audioSink;
67 QGstPad videoSink;
68 };
69 void linkAndStartEncoder(RecorderElements, const QMediaMetaData &);
70 void unlinkRecorder();
71 void finalizeRecorder();
72
73private:
74 bool processBusMessage(const QGstreamerMessage &) override;
75 bool processBusMessageError(const QGstreamerMessage &);
76 bool processBusMessageLatency(const QGstreamerMessage &);
77
78 void setCameraActive(bool activate);
79
80 explicit QGstreamerMediaCaptureSession(QGstreamerVideoOutput *videoOutput);
81
82 friend QGstreamerMediaRecorder;
83 // Gst elements
84 QGstPipeline capturePipeline;
85
86 QGstreamerAudioInput *gstAudioInput = nullptr;
87 QGstreamerCameraBase *gstCamera = nullptr;
88 QMetaObject::Connection gstCameraActiveConnection;
89
90 QGstElement gstAudioTee;
91 QGstPad audioSrcPadForEncoder;
92 QGstPad audioSrcPadForOutput;
93
94 QGstElement gstVideoTee;
95 QGstPad videoSrcPadForEncoder;
96 QGstPad videoSrcPadForOutput;
97 QGstPad videoSrcPadForImageCapture;
98
99 QGstElement encoderVideoCapsFilter;
100 QGstElement encoderAudioCapsFilter;
101
102 QGstPad imageCaptureSink();
103 QGstPad videoOutputSink();
104 QGstPad audioOutputSink();
105
106 std::optional<RecorderElements> m_currentRecorderState;
107
108 QGstreamerAudioOutput *gstAudioOutput = nullptr;
109 QGstreamerVideoOutput *gstVideoOutput = nullptr;
110
111 QGstreamerMediaRecorder *m_mediaRecorder = nullptr;
112 QGstreamerImageCapture *m_imageCapture = nullptr;
113};
114
115QT_END_NAMESPACE
116
117#endif // QGSTREAMERMEDIACAPTURESESSION_H
118

source code of qtmultimedia/src/plugins/multimedia/gstreamer/mediacapture/qgstreamermediacapturesession_p.h