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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 (qt-info@nokia.com) |
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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 ** No Commercial Usage |
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11 ** This file contains pre-release code and may not be distributed. |
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12 ** You may use this file in accordance with the terms and conditions |
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13 ** contained in the Technology Preview License Agreement accompanying |
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14 ** this package. |
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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 ** If you have questions regarding the use of this file, please contact |
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29 ** Nokia at qt-info@nokia.com. |
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30 ** |
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31 ** |
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32 ** |
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33 ** |
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34 ** |
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35 ** |
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36 ** |
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37 ** |
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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::equivalentImageFormat(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::equivalentImageFormat(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] |