Fraxinus  16.5.0-fx-rc5
An IGT application
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cxLayoutVideoSource.cpp
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1 /*=========================================================================
2 This file is part of CustusX, an Image Guided Therapy Application.
3 
4 Copyright (c) 2008-2014, SINTEF Department of Medical Technology
5 All rights reserved.
6 
7 Redistribution and use in source and binary forms, with or without
8 modification, are permitted provided that the following conditions are met:
9 
10 1. Redistributions of source code must retain the above copyright notice,
11  this list of conditions and the following disclaimer.
12 
13 2. Redistributions in binary form must reproduce the above copyright notice,
14  this list of conditions and the following disclaimer in the documentation
15  and/or other materials provided with the distribution.
16 
17 3. Neither the name of the copyright holder nor the names of its contributors
18  may be used to endorse or promote products derived from this software
19  without specific prior written permission.
20 
21 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
22 AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
24 DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
25 FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
27 SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
28 CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
29 OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
30 OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
31 =========================================================================*/
32 #include "cxLayoutVideoSource.h"
34 #include "cxViewCollectionWidget.h"
35 #include "vtkImageData.h"
36 #include "cxLogger.h"
37 
38 namespace cx
39 {
40 
42  mWidget(widget),
43  mStreaming(false)
44 {
45  CX_ASSERT(widget);
46  connect(mWidget.data(), &ViewCollectionWidget::rendered, this, &LayoutVideoSource::onRendered);
47 }
48 
50 {
51  return QString("LayoutVideoSource%1").arg(reinterpret_cast<long>(this));
52 }
53 
55 {
56  return QString("LayoutVideoSource");
57 }
58 
60 {
61  return mTimestamp.toMSecsSinceEpoch();
62 }
63 
65 {
66  if (mStreaming)
67  return;
68 
69  mStreaming = true;
70  emit streaming(mStreaming);
71 }
72 
74 {
75  if (!mStreaming)
76  return;
77 
78  mGrabbed = vtkImageDataPtr();
79  mStreaming = false;
80  emit streaming(mStreaming);
81 }
82 
84 {
85  return mStreaming;
86 }
87 
89 {
90  return true;
91 }
92 
94 {
95  return mStreaming;
96 }
97 
98 void LayoutVideoSource::onRendered()
99 {
100  if (!mStreaming)
101  return;
102 
103  mGrabbed = vtkImageDataPtr();
104  mTimestamp = QDateTime::currentDateTime();
105  emit newFrame();
106 }
107 
109 {
110  if (!mStreaming)
111  return vtkImageDataPtr();
112 
113  if (!mGrabbed)
114  {
115  ViewCollectionImageWriter grabber(mWidget);
116  mGrabbed = grabber.grab();
117  }
118  return mGrabbed;
119 }
120 
121 } // namespace cx
virtual void stop()
stop streaming
#define CX_ASSERT(statement)
Definition: cxLogger.h:131
virtual bool isConnected() const
return true when a connection to the data source is established.
void streaming(bool on)
emitted when streaming started/stopped
virtual vtkImageDataPtr getVtkImageData()
LayoutVideoSource(ViewCollectionWidget *widget)
virtual void start()
start streaming
virtual double getTimestamp()
vtkSmartPointer< class vtkImageData > vtkImageDataPtr
virtual bool isStreaming() const
return true when the source is streaming data.
virtual bool validData() const
return true is data stream is ok to display. This is a heuristic based on the data rate...
void newFrame()
emitted when a new frame has arrived (getVtkImageData() returns something new). info/status/name/vali...