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| ** This file is part of the Qt Toolkit. |
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| ** $QT_BEGIN_LICENSE:LGPL$ |
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| ****************************************************************************/ |
| |
| #include "qgstreamervideowidget_p.h" |
| #include "qgstutils_p.h" |
| |
| #include <QtCore/qcoreevent.h> |
| #include <QtCore/qdebug.h> |
| #include <QtGui/qpainter.h> |
| |
| QT_BEGIN_NAMESPACE |
| |
| class QGstreamerVideoWidget : public QWidget |
| { |
| public: |
| QGstreamerVideoWidget(QWidget *parent = 0) |
| :QWidget(parent) |
| { |
| setSizePolicy(QSizePolicy::Expanding, QSizePolicy::Expanding); |
| QPalette palette; |
| palette.setColor(QPalette::Window, Qt::black); |
| setPalette(palette); |
| } |
| |
| virtual ~QGstreamerVideoWidget() {} |
| |
| QSize sizeHint() const override |
| { |
| return m_nativeSize; |
| } |
| |
| void setNativeSize( const QSize &size) |
| { |
| if (size != m_nativeSize) { |
| m_nativeSize = size; |
| if (size.isEmpty()) |
| setMinimumSize(0,0); |
| else |
| setMinimumSize(160,120); |
| |
| updateGeometry(); |
| } |
| } |
| |
| void paint_helper() |
| { |
| QPainter painter(this); |
| painter.fillRect(rect(), palette().window()); |
| } |
| |
| protected: |
| void paintEvent(QPaintEvent *) override |
| { |
| paint_helper(); |
| } |
| |
| QSize m_nativeSize; |
| }; |
| |
| QGstreamerVideoWidgetControl::QGstreamerVideoWidgetControl(QObject *parent, const QByteArray &elementName) |
| : QVideoWidgetControl(parent) |
| , m_videoOverlay(this, !elementName.isEmpty() ? elementName : qgetenv("QT_GSTREAMER_WIDGET_VIDEOSINK")) |
| { |
| connect(&m_videoOverlay, &QGstreamerVideoOverlay::activeChanged, |
| this, &QGstreamerVideoWidgetControl::onOverlayActiveChanged); |
| connect(&m_videoOverlay, &QGstreamerVideoOverlay::nativeVideoSizeChanged, |
| this, &QGstreamerVideoWidgetControl::onNativeVideoSizeChanged); |
| connect(&m_videoOverlay, &QGstreamerVideoOverlay::brightnessChanged, |
| this, &QGstreamerVideoWidgetControl::brightnessChanged); |
| connect(&m_videoOverlay, &QGstreamerVideoOverlay::contrastChanged, |
| this, &QGstreamerVideoWidgetControl::contrastChanged); |
| connect(&m_videoOverlay, &QGstreamerVideoOverlay::hueChanged, |
| this, &QGstreamerVideoWidgetControl::hueChanged); |
| connect(&m_videoOverlay, &QGstreamerVideoOverlay::saturationChanged, |
| this, &QGstreamerVideoWidgetControl::saturationChanged); |
| } |
| |
| QGstreamerVideoWidgetControl::~QGstreamerVideoWidgetControl() |
| { |
| delete m_widget; |
| } |
| |
| void QGstreamerVideoWidgetControl::createVideoWidget() |
| { |
| if (m_widget) |
| return; |
| |
| m_widget = new QGstreamerVideoWidget; |
| |
| m_widget->installEventFilter(this); |
| m_videoOverlay.setWindowHandle(m_windowId = m_widget->winId()); |
| } |
| |
| GstElement *QGstreamerVideoWidgetControl::videoSink() |
| { |
| return m_videoOverlay.videoSink(); |
| } |
| |
| void QGstreamerVideoWidgetControl::setVideoSink(GstElement *sink) |
| { |
| m_videoOverlay.setVideoSink(sink); |
| } |
| |
| void QGstreamerVideoWidgetControl::onOverlayActiveChanged() |
| { |
| updateWidgetAttributes(); |
| } |
| |
| void QGstreamerVideoWidgetControl::stopRenderer() |
| { |
| m_stopped = true; |
| updateWidgetAttributes(); |
| m_widget->setNativeSize(QSize()); |
| } |
| |
| void QGstreamerVideoWidgetControl::onNativeVideoSizeChanged() |
| { |
| const QSize &size = m_videoOverlay.nativeVideoSize(); |
| |
| if (size.isValid()) |
| m_stopped = false; |
| |
| if (m_widget) |
| m_widget->setNativeSize(size); |
| } |
| |
| bool QGstreamerVideoWidgetControl::eventFilter(QObject *object, QEvent *e) |
| { |
| if (m_widget && object == m_widget) { |
| if (e->type() == QEvent::ParentChange || e->type() == QEvent::Show || e->type() == QEvent::WinIdChange) { |
| WId newWId = m_widget->winId(); |
| if (newWId != m_windowId) |
| m_videoOverlay.setWindowHandle(m_windowId = newWId); |
| } |
| |
| if (e->type() == QEvent::Paint) { |
| // Update overlay by new size if any. |
| if (QGstUtils::useOpenGL()) |
| m_videoOverlay.setRenderRectangle(QRect(0, 0, m_widget->width(), m_widget->height())); |
| if (m_videoOverlay.isActive()) |
| m_videoOverlay.expose(); // triggers a repaint of the last frame |
| else |
| m_widget->paint_helper(); // paints the black background |
| |
| return true; |
| } |
| } |
| |
| return false; |
| } |
| |
| void QGstreamerVideoWidgetControl::updateWidgetAttributes() |
| { |
| // When frames are being rendered (sink is active), we need the WA_PaintOnScreen attribute to |
| // be set in order to avoid flickering when the widget is repainted (for example when resized). |
| // We need to clear that flag when the the sink is inactive to allow the widget to paint its |
| // background, otherwise some garbage will be displayed. |
| if (m_videoOverlay.isActive() && !m_stopped) { |
| m_widget->setAttribute(Qt::WA_NoSystemBackground, true); |
| m_widget->setAttribute(Qt::WA_PaintOnScreen, true); |
| } else { |
| m_widget->setAttribute(Qt::WA_NoSystemBackground, false); |
| m_widget->setAttribute(Qt::WA_PaintOnScreen, false); |
| m_widget->update(); |
| } |
| } |
| |
| bool QGstreamerVideoWidgetControl::processSyncMessage(const QGstreamerMessage &message) |
| { |
| return m_videoOverlay.processSyncMessage(message); |
| } |
| |
| bool QGstreamerVideoWidgetControl::processBusMessage(const QGstreamerMessage &message) |
| { |
| return m_videoOverlay.processBusMessage(message); |
| } |
| |
| QWidget *QGstreamerVideoWidgetControl::videoWidget() |
| { |
| createVideoWidget(); |
| return m_widget; |
| } |
| |
| Qt::AspectRatioMode QGstreamerVideoWidgetControl::aspectRatioMode() const |
| { |
| return m_videoOverlay.aspectRatioMode(); |
| } |
| |
| void QGstreamerVideoWidgetControl::setAspectRatioMode(Qt::AspectRatioMode mode) |
| { |
| m_videoOverlay.setAspectRatioMode(mode); |
| } |
| |
| bool QGstreamerVideoWidgetControl::isFullScreen() const |
| { |
| return m_fullScreen; |
| } |
| |
| void QGstreamerVideoWidgetControl::setFullScreen(bool fullScreen) |
| { |
| emit fullScreenChanged(m_fullScreen = fullScreen); |
| } |
| |
| int QGstreamerVideoWidgetControl::brightness() const |
| { |
| return m_videoOverlay.brightness(); |
| } |
| |
| void QGstreamerVideoWidgetControl::setBrightness(int brightness) |
| { |
| m_videoOverlay.setBrightness(brightness); |
| } |
| |
| int QGstreamerVideoWidgetControl::contrast() const |
| { |
| return m_videoOverlay.contrast(); |
| } |
| |
| void QGstreamerVideoWidgetControl::setContrast(int contrast) |
| { |
| m_videoOverlay.setContrast(contrast); |
| } |
| |
| int QGstreamerVideoWidgetControl::hue() const |
| { |
| return m_videoOverlay.hue(); |
| } |
| |
| void QGstreamerVideoWidgetControl::setHue(int hue) |
| { |
| m_videoOverlay.setHue(hue); |
| } |
| |
| int QGstreamerVideoWidgetControl::saturation() const |
| { |
| return m_videoOverlay.saturation(); |
| } |
| |
| void QGstreamerVideoWidgetControl::setSaturation(int saturation) |
| { |
| m_videoOverlay.setSaturation(saturation); |
| } |
| |
| QT_END_NAMESPACE |