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39
40#include "qgstreamervideoprobecontrol_p.h"
41
42#include "qgstutils_p.h"
43#include <private/qgstvideobuffer_p.h>
44
45QGstreamerVideoProbeControl::QGstreamerVideoProbeControl(QObject *parent)
46 : QMediaVideoProbeControl(parent)
47{
48}
49
50QGstreamerVideoProbeControl::~QGstreamerVideoProbeControl()
51{
52}
53
54void QGstreamerVideoProbeControl::startFlushing()
55{
56 m_flushing = true;
57
58 {
59 QMutexLocker locker(&m_frameMutex);
60 m_pendingFrame = QVideoFrame();
61 }
62
63 // only emit flush if at least one frame was probed
64 if (m_frameProbed)
65 emit flush();
66}
67
68void QGstreamerVideoProbeControl::stopFlushing()
69{
70 m_flushing = false;
71}
72
73void QGstreamerVideoProbeControl::probeCaps(GstCaps *caps)
74{
75#if GST_CHECK_VERSION(1,0,0)
76 GstVideoInfo videoInfo;
77 QVideoSurfaceFormat format = QGstUtils::formatForCaps(caps, info: &videoInfo);
78
79 QMutexLocker locker(&m_frameMutex);
80 m_videoInfo = videoInfo;
81#else
82 int bytesPerLine = 0;
83 QVideoSurfaceFormat format = QGstUtils::formatForCaps(caps, &bytesPerLine);
84
85 QMutexLocker locker(&m_frameMutex);
86 m_bytesPerLine = bytesPerLine;
87#endif
88 m_format = format;
89}
90
91bool QGstreamerVideoProbeControl::probeBuffer(GstBuffer *buffer)
92{
93 QMutexLocker locker(&m_frameMutex);
94
95 if (m_flushing || !m_format.isValid())
96 return true;
97
98 QVideoFrame frame(
99#if GST_CHECK_VERSION(1,0,0)
100 new QGstVideoBuffer(buffer, m_videoInfo),
101#else
102 new QGstVideoBuffer(buffer, m_bytesPerLine),
103#endif
104 m_format.frameSize(),
105 m_format.pixelFormat());
106
107 QGstUtils::setFrameTimeStamps(frame: &frame, buffer);
108
109 m_frameProbed = true;
110
111 if (!m_pendingFrame.isValid())
112 QMetaObject::invokeMethod(obj: this, member: "frameProbed", type: Qt::QueuedConnection);
113 m_pendingFrame = frame;
114
115 return true;
116}
117
118void QGstreamerVideoProbeControl::frameProbed()
119{
120 QVideoFrame frame;
121 {
122 QMutexLocker locker(&m_frameMutex);
123 if (!m_pendingFrame.isValid())
124 return;
125 frame = m_pendingFrame;
126 m_pendingFrame = QVideoFrame();
127 }
128 emit videoFrameProbed(frame);
129}
130

source code of qtmultimedia/src/gsttools/qgstreamervideoprobecontrol.cpp