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
|
/* Copyright (c) 2012 Patrick Ruoff
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* 20130312, WVR: Add 7 lines to resizeGL after resize_frame. This should lower CPU-load.
*/
#include "pt_video_widget.h"
#include <QDebug>
#include <QHBoxLayout>
using namespace cv;
using namespace std;
void PTVideoWidget::update_image(const cv::Mat& frame)
{
QMutexLocker foo(&mtx);
const int rate = 40;
if (freshp)
return;
if (frame.empty() || !update_throttler.isValid() || update_throttler.elapsed() > rate)
{
_frame = frame.clone();
update_throttler.restart();
freshp = true;
}
}
// ----------------------------------------------------------------------------
VideoWidgetDialog::VideoWidgetDialog(QWidget *parent, FrameProvider* provider)
: QDialog(parent),
video_widget(NULL)
{
const int VIDEO_FRAME_WIDTH = 640;
const int VIDEO_FRAME_HEIGHT = 480;
video_widget = new PTVideoWidget(this, provider);
QHBoxLayout* layout = new QHBoxLayout();
layout->setContentsMargins(0, 0, 0, 0);
layout->addWidget(video_widget);
if (this->layout()) delete this->layout();
setLayout(layout);
resize(VIDEO_FRAME_WIDTH, VIDEO_FRAME_HEIGHT);
}
void PTVideoWidget::update_and_repaint()
{
QMutexLocker foo(&mtx);
if (_frame.empty() || !freshp)
return;
freshp = false;
QImage qframe = QImage(_frame.cols, _frame.rows, QImage::Format_RGB888);
uchar* data = qframe.bits();
const int pitch = qframe.bytesPerLine();
for (int y = 0; y < _frame.rows; y++)
for (int x = 0; x < _frame.cols; x++)
{
const auto& elt = _frame.at<Vec3b>(y, x);
const cv::Scalar elt2 = static_cast<cv::Scalar>(elt);
data[y * pitch + x * 3 + 0] = elt2.val[2];
data[y * pitch + x * 3 + 1] = elt2.val[1];
data[y * pitch + x * 3 + 2] = elt2.val[0];
}
qframe = qframe.scaled(size(), Qt::IgnoreAspectRatio, Qt::FastTransformation);
texture = qframe;
update();
}
|
