|
1 /**************************************************************************** |
|
2 ** |
|
3 ** Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies). |
|
4 ** All rights reserved. |
|
5 ** Contact: Nokia Corporation (qt-info@nokia.com) |
|
6 ** |
|
7 ** This file is part of the examples of the Qt Toolkit. |
|
8 ** |
|
9 ** $QT_BEGIN_LICENSE:LGPL$ |
|
10 ** No Commercial Usage |
|
11 ** This file contains pre-release code and may not be distributed. |
|
12 ** You may use this file in accordance with the terms and conditions |
|
13 ** contained in the Technology Preview License Agreement accompanying |
|
14 ** this package. |
|
15 ** |
|
16 ** GNU Lesser General Public License Usage |
|
17 ** Alternatively, this file may be used under the terms of the GNU Lesser |
|
18 ** General Public License version 2.1 as published by the Free Software |
|
19 ** Foundation and appearing in the file LICENSE.LGPL included in the |
|
20 ** packaging of this file. Please review the following information to |
|
21 ** ensure the GNU Lesser General Public License version 2.1 requirements |
|
22 ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html. |
|
23 ** |
|
24 ** In addition, as a special exception, Nokia gives you certain additional |
|
25 ** rights. These rights are described in the Nokia Qt LGPL Exception |
|
26 ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package. |
|
27 ** |
|
28 ** If you have questions regarding the use of this file, please contact |
|
29 ** Nokia at qt-info@nokia.com. |
|
30 ** |
|
31 ** |
|
32 ** |
|
33 ** |
|
34 ** |
|
35 ** |
|
36 ** |
|
37 ** |
|
38 ** $QT_END_LICENSE$ |
|
39 ** |
|
40 ****************************************************************************/ |
|
41 |
|
42 #include "videowidgetsurface.h" |
|
43 |
|
44 #include <QtGui> |
|
45 #include <qabstractvideosurface.h> |
|
46 #include <qvideosurfaceformat.h> |
|
47 |
|
48 VideoWidgetSurface::VideoWidgetSurface(QWidget *widget, QObject *parent) |
|
49 : QAbstractVideoSurface(parent) |
|
50 , widget(widget) |
|
51 , imageFormat(QImage::Format_Invalid) |
|
52 { |
|
53 } |
|
54 |
|
55 //! [0] |
|
56 QList<QVideoFrame::PixelFormat> VideoWidgetSurface::supportedPixelFormats( |
|
57 QAbstractVideoBuffer::HandleType handleType) const |
|
58 { |
|
59 if (handleType == QAbstractVideoBuffer::NoHandle) { |
|
60 return QList<QVideoFrame::PixelFormat>() |
|
61 << QVideoFrame::Format_RGB32 |
|
62 << QVideoFrame::Format_ARGB32 |
|
63 << QVideoFrame::Format_ARGB32_Premultiplied |
|
64 << QVideoFrame::Format_RGB565 |
|
65 << QVideoFrame::Format_RGB555; |
|
66 } else { |
|
67 return QList<QVideoFrame::PixelFormat>(); |
|
68 } |
|
69 } |
|
70 //! [0] |
|
71 |
|
72 //! [1] |
|
73 bool VideoWidgetSurface::isFormatSupported( |
|
74 const QVideoSurfaceFormat &format, QVideoSurfaceFormat *similar) const |
|
75 { |
|
76 Q_UNUSED(similar); |
|
77 |
|
78 const QImage::Format imageFormat = QVideoFrame::imageFormatFromPixelFormat(format.pixelFormat()); |
|
79 const QSize size = format.frameSize(); |
|
80 |
|
81 return imageFormat != QImage::Format_Invalid |
|
82 && !size.isEmpty() |
|
83 && format.handleType() == QAbstractVideoBuffer::NoHandle; |
|
84 } |
|
85 //! [1] |
|
86 |
|
87 //! [2] |
|
88 bool VideoWidgetSurface::start(const QVideoSurfaceFormat &format) |
|
89 { |
|
90 const QImage::Format imageFormat = QVideoFrame::imageFormatFromPixelFormat(format.pixelFormat()); |
|
91 const QSize size = format.frameSize(); |
|
92 |
|
93 if (imageFormat != QImage::Format_Invalid && !size.isEmpty()) { |
|
94 this->imageFormat = imageFormat; |
|
95 imageSize = size; |
|
96 sourceRect = format.viewport(); |
|
97 |
|
98 QAbstractVideoSurface::start(format); |
|
99 |
|
100 widget->updateGeometry(); |
|
101 updateVideoRect(); |
|
102 |
|
103 return true; |
|
104 } else { |
|
105 return false; |
|
106 } |
|
107 } |
|
108 //! [2] |
|
109 |
|
110 //! [3] |
|
111 void VideoWidgetSurface::stop() |
|
112 { |
|
113 currentFrame = QVideoFrame(); |
|
114 targetRect = QRect(); |
|
115 |
|
116 QAbstractVideoSurface::stop(); |
|
117 |
|
118 widget->update(); |
|
119 } |
|
120 //! [3] |
|
121 |
|
122 //! [4] |
|
123 bool VideoWidgetSurface::present(const QVideoFrame &frame) |
|
124 { |
|
125 if (surfaceFormat().pixelFormat() != frame.pixelFormat() |
|
126 || surfaceFormat().frameSize() != frame.size()) { |
|
127 setError(IncorrectFormatError); |
|
128 stop(); |
|
129 |
|
130 return false; |
|
131 } else { |
|
132 currentFrame = frame; |
|
133 |
|
134 widget->repaint(targetRect); |
|
135 |
|
136 return true; |
|
137 } |
|
138 } |
|
139 //! [4] |
|
140 |
|
141 //! [5] |
|
142 void VideoWidgetSurface::updateVideoRect() |
|
143 { |
|
144 QSize size = surfaceFormat().sizeHint(); |
|
145 size.scale(widget->size().boundedTo(size), Qt::KeepAspectRatio); |
|
146 |
|
147 targetRect = QRect(QPoint(0, 0), size); |
|
148 targetRect.moveCenter(widget->rect().center()); |
|
149 } |
|
150 //! [5] |
|
151 |
|
152 //! [6] |
|
153 void VideoWidgetSurface::paint(QPainter *painter) |
|
154 { |
|
155 if (currentFrame.map(QAbstractVideoBuffer::ReadOnly)) { |
|
156 const QTransform oldTransform = painter->transform(); |
|
157 |
|
158 if (surfaceFormat().scanLineDirection() == QVideoSurfaceFormat::BottomToTop) { |
|
159 painter->scale(1, -1); |
|
160 painter->translate(0, -widget->height()); |
|
161 } |
|
162 |
|
163 QImage image( |
|
164 currentFrame.bits(), |
|
165 currentFrame.width(), |
|
166 currentFrame.height(), |
|
167 currentFrame.bytesPerLine(), |
|
168 imageFormat); |
|
169 |
|
170 painter->drawImage(targetRect, image, sourceRect); |
|
171 |
|
172 painter->setTransform(oldTransform); |
|
173 |
|
174 currentFrame.unmap(); |
|
175 } |
|
176 } |
|
177 //! [6] |