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40
41 #include "videoitem.h"
42
43 #include <QtMultimedia>
44
VideoItem(QGraphicsItem * parent)45 VideoItem::VideoItem(QGraphicsItem *parent)
46 : QGraphicsItem(parent)
47 , imageFormat(QImage::Format_Invalid)
48 , framePainted(false)
49 {
50 }
51
~VideoItem()52 VideoItem::~VideoItem()
53 {
54 }
55
boundingRect() const56 QRectF VideoItem::boundingRect() const
57 {
58 return QRectF(QPointF(0,0), surfaceFormat().sizeHint());
59 }
60
paint(QPainter * painter,const QStyleOptionGraphicsItem * option,QWidget * widget)61 void VideoItem::paint(QPainter *painter, const QStyleOptionGraphicsItem *option, QWidget *widget)
62 {
63 Q_UNUSED(option);
64 Q_UNUSED(widget);
65
66 if (currentFrame.map(QAbstractVideoBuffer::ReadOnly)) {
67 const QTransform oldTransform = painter->transform();
68
69 if (surfaceFormat().scanLineDirection() == QVideoSurfaceFormat::BottomToTop) {
70 painter->scale(1, -1);
71 painter->translate(0, -boundingRect().height());
72 }
73
74 painter->drawImage(boundingRect(), QImage(
75 currentFrame.bits(),
76 imageSize.width(),
77 imageSize.height(),
78 imageFormat));
79
80 painter->setTransform(oldTransform);
81
82 framePainted = true;
83
84 currentFrame.unmap();
85 }
86 }
87
supportedPixelFormats(QAbstractVideoBuffer::HandleType handleType) const88 QList<QVideoFrame::PixelFormat> VideoItem::supportedPixelFormats(
89 QAbstractVideoBuffer::HandleType handleType) const
90 {
91 if (handleType == QAbstractVideoBuffer::NoHandle) {
92 return QList<QVideoFrame::PixelFormat>()
93 << QVideoFrame::Format_RGB32
94 << QVideoFrame::Format_ARGB32
95 << QVideoFrame::Format_ARGB32_Premultiplied
96 << QVideoFrame::Format_RGB565
97 << QVideoFrame::Format_RGB555;
98 } else {
99 return QList<QVideoFrame::PixelFormat>();
100 }
101 }
102
start(const QVideoSurfaceFormat & format)103 bool VideoItem::start(const QVideoSurfaceFormat &format)
104 {
105 if (isFormatSupported(format)) {
106 imageFormat = QVideoFrame::imageFormatFromPixelFormat(format.pixelFormat());
107 imageSize = format.frameSize();
108 framePainted = true;
109
110 QAbstractVideoSurface::start(format);
111
112 prepareGeometryChange();
113
114 return true;
115 } else {
116 return false;
117 }
118 }
119
stop()120 void VideoItem::stop()
121 {
122 currentFrame = QVideoFrame();
123 framePainted = false;
124
125 QAbstractVideoSurface::stop();
126 }
127
present(const QVideoFrame & frame)128 bool VideoItem::present(const QVideoFrame &frame)
129 {
130 if (!framePainted) {
131 if (!QAbstractVideoSurface::isActive())
132 setError(StoppedError);
133
134 return false;
135 } else {
136 currentFrame = frame;
137 framePainted = false;
138
139 update();
140
141 return true;
142 }
143 }
144