1 | /****************************************************************************
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2 | **
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3 | ** Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
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4 | ** All rights reserved.
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5 | ** Contact: Nokia Corporation ([email protected])
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6 | **
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7 | ** This file is part of the examples of the Qt Toolkit.
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8 | **
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9 | ** $QT_BEGIN_LICENSE:LGPL$
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10 | ** Commercial Usage
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11 | ** Licensees holding valid Qt Commercial licenses may use this file in
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12 | ** accordance with the Qt Commercial License Agreement provided with the
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13 | ** Software or, alternatively, in accordance with the terms contained in
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14 | ** a written agreement between you and Nokia.
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15 | **
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16 | ** GNU Lesser General Public License Usage
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17 | ** Alternatively, this file may be used under the terms of the GNU Lesser
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18 | ** General Public License version 2.1 as published by the Free Software
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19 | ** Foundation and appearing in the file LICENSE.LGPL included in the
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20 | ** packaging of this file. Please review the following information to
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21 | ** ensure the GNU Lesser General Public License version 2.1 requirements
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22 | ** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
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23 | **
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24 | ** In addition, as a special exception, Nokia gives you certain additional
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25 | ** rights. These rights are described in the Nokia Qt LGPL Exception
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26 | ** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
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27 | **
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28 | ** GNU General Public License Usage
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29 | ** Alternatively, this file may be used under the terms of the GNU
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30 | ** General Public License version 3.0 as published by the Free Software
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31 | ** Foundation and appearing in the file LICENSE.GPL included in the
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32 | ** packaging of this file. Please review the following information to
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33 | ** ensure the GNU General Public License version 3.0 requirements will be
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34 | ** met: http://www.gnu.org/copyleft/gpl.html.
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35 | **
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36 | ** If you have questions regarding the use of this file, please contact
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37 | ** Nokia at [email protected].
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38 | ** $QT_END_LICENSE$
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39 | **
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40 | ****************************************************************************/
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41 |
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42 | #include "videowidgetsurface.h"
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43 |
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44 | #include <QtMultimedia>
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45 |
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46 | VideoWidgetSurface::VideoWidgetSurface(QWidget *widget, QObject *parent)
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47 | : QAbstractVideoSurface(parent)
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48 | , widget(widget)
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49 | , imageFormat(QImage::Format_Invalid)
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50 | {
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51 | }
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52 |
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53 | //! [0]
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54 | QList<QVideoFrame::PixelFormat> VideoWidgetSurface::supportedPixelFormats(
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55 | QAbstractVideoBuffer::HandleType handleType) const
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56 | {
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57 | if (handleType == QAbstractVideoBuffer::NoHandle) {
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58 | return QList<QVideoFrame::PixelFormat>()
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59 | << QVideoFrame::Format_RGB32
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60 | << QVideoFrame::Format_ARGB32
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61 | << QVideoFrame::Format_ARGB32_Premultiplied
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62 | << QVideoFrame::Format_RGB565
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63 | << QVideoFrame::Format_RGB555;
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64 | } else {
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65 | return QList<QVideoFrame::PixelFormat>();
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66 | }
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67 | }
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68 | //! [0]
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69 |
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70 | //! [1]
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71 | bool VideoWidgetSurface::isFormatSupported(
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72 | const QVideoSurfaceFormat &format, QVideoSurfaceFormat *similar) const
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73 | {
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74 | Q_UNUSED(similar);
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75 |
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76 | const QImage::Format imageFormat = QVideoFrame::imageFormatFromPixelFormat(format.pixelFormat());
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77 | const QSize size = format.frameSize();
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78 |
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79 | return imageFormat != QImage::Format_Invalid
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80 | && !size.isEmpty()
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81 | && format.handleType() == QAbstractVideoBuffer::NoHandle;
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82 | }
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83 | //! [1]
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84 |
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85 | //! [2]
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86 | bool VideoWidgetSurface::start(const QVideoSurfaceFormat &format)
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87 | {
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88 | const QImage::Format imageFormat = QVideoFrame::imageFormatFromPixelFormat(format.pixelFormat());
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89 | const QSize size = format.frameSize();
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90 |
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91 | if (imageFormat != QImage::Format_Invalid && !size.isEmpty()) {
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92 | this->imageFormat = imageFormat;
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93 | imageSize = size;
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94 | sourceRect = format.viewport();
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95 |
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96 | QAbstractVideoSurface::start(format);
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97 |
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98 | widget->updateGeometry();
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99 | updateVideoRect();
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100 |
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101 | return true;
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102 | } else {
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103 | return false;
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104 | }
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105 | }
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106 | //! [2]
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107 |
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108 | //! [3]
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109 | void VideoWidgetSurface::stop()
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110 | {
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111 | currentFrame = QVideoFrame();
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112 | targetRect = QRect();
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113 |
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114 | QAbstractVideoSurface::stop();
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115 |
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116 | widget->update();
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117 | }
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118 | //! [3]
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119 |
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120 | //! [4]
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121 | bool VideoWidgetSurface::present(const QVideoFrame &frame)
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122 | {
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123 | if (surfaceFormat().pixelFormat() != frame.pixelFormat()
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124 | || surfaceFormat().frameSize() != frame.size()) {
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125 | setError(IncorrectFormatError);
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126 | stop();
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127 |
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128 | return false;
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129 | } else {
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130 | currentFrame = frame;
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131 |
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132 | widget->repaint(targetRect);
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133 |
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134 | return true;
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135 | }
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136 | }
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137 | //! [4]
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138 |
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139 | //! [5]
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140 | void VideoWidgetSurface::updateVideoRect()
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141 | {
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142 | QSize size = surfaceFormat().sizeHint();
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143 | size.scale(widget->size().boundedTo(size), Qt::KeepAspectRatio);
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144 |
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145 | targetRect = QRect(QPoint(0, 0), size);
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146 | targetRect.moveCenter(widget->rect().center());
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147 | }
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148 | //! [5]
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149 |
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150 | //! [6]
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151 | void VideoWidgetSurface::paint(QPainter *painter)
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152 | {
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153 | if (currentFrame.map(QAbstractVideoBuffer::ReadOnly)) {
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154 | const QTransform oldTransform = painter->transform();
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155 |
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156 | if (surfaceFormat().scanLineDirection() == QVideoSurfaceFormat::BottomToTop) {
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157 | painter->scale(1, -1);
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158 | painter->translate(0, -widget->height());
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159 | }
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160 |
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161 | QImage image(
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162 | currentFrame.bits(),
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163 | currentFrame.width(),
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164 | currentFrame.height(),
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165 | currentFrame.bytesPerLine(),
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166 | imageFormat);
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167 |
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168 | painter->drawImage(targetRect, image, sourceRect);
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169 |
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170 | painter->setTransform(oldTransform);
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171 |
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172 | currentFrame.unmap();
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173 | }
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174 | }
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175 | //! [6]
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