1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
|
/****************************************************************************
**
** Copyright (C) 2012 Nokia Corporation and/or its subsidiary(-ies).
** Contact: http://www.qt-project.org/
**
** This file is part of the Qt Toolkit.
**
** $QT_BEGIN_LICENSE:LGPL$
** GNU Lesser General Public License Usage
** This file may be used under the terms of the GNU Lesser General Public
** License version 2.1 as published by the Free Software Foundation and
** appearing in the file LICENSE.LGPL included in the packaging of this
** file. Please review the following information to ensure the GNU Lesser
** General Public License version 2.1 requirements will be met:
** http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
**
** In addition, as a special exception, Nokia gives you certain additional
** rights. These rights are described in the Nokia Qt LGPL Exception
** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
**
** GNU General Public License Usage
** Alternatively, this file may be used under the terms of the GNU General
** Public License version 3.0 as published by the Free Software Foundation
** and appearing in the file LICENSE.GPL included in the packaging of this
** file. Please review the following information to ensure the GNU General
** Public License version 3.0 requirements will be met:
** http://www.gnu.org/copyleft/gpl.html.
**
** Other Usage
** Alternatively, this file may be used in accordance with the terms and
** conditions contained in a signed written agreement between you and Nokia.
**
**
**
**
**
**
** $QT_END_LICENSE$
**
****************************************************************************/
#include "qgstreamervideoprobecontrol.h"
#include <private/qvideosurfacegstsink_p.h>
#include <private/qgstvideobuffer_p.h>
QGstreamerVideoProbeControl::QGstreamerVideoProbeControl(QObject *parent)
: QMediaVideoProbeControl(parent)
, m_flushing(false)
, m_frameProbed(false)
{
}
QGstreamerVideoProbeControl::~QGstreamerVideoProbeControl()
{
}
void QGstreamerVideoProbeControl::startFlushing()
{
m_flushing = true;
{
QMutexLocker locker(&m_frameMutex);
m_pendingFrame = QVideoFrame();
}
// only emit flush if at least one frame was probed
if (m_frameProbed)
emit flush();
}
void QGstreamerVideoProbeControl::stopFlushing()
{
m_flushing = false;
}
void QGstreamerVideoProbeControl::bufferProbed(GstBuffer* buffer)
{
if (m_flushing)
return;
GstCaps* caps = gst_buffer_get_caps(buffer);
if (!caps)
return;
int bytesPerLine = 0;
QVideoSurfaceFormat format = QVideoSurfaceGstSink::formatForCaps(caps, &bytesPerLine);
gst_caps_unref(caps);
if (!format.isValid() || !bytesPerLine)
return;
QVideoFrame frame = QVideoFrame(new QGstVideoBuffer(buffer, bytesPerLine),
format.frameSize(), format.pixelFormat());
QVideoSurfaceGstSink::setFrameTimeStamps(&frame, buffer);
m_frameProbed = true;
{
QMutexLocker locker(&m_frameMutex);
m_pendingFrame = frame;
QMetaObject::invokeMethod(this, "frameProbed", Qt::QueuedConnection);
}
}
void QGstreamerVideoProbeControl::frameProbed()
{
QVideoFrame frame;
{
QMutexLocker locker(&m_frameMutex);
if (!m_pendingFrame.isValid())
return;
frame = m_pendingFrame;
}
emit videoFrameProbed(frame);
}
|
