diff options
Diffstat (limited to 'src/gsttools/qgstreamervideowidget.cpp')
| -rw-r--r-- | src/gsttools/qgstreamervideowidget.cpp | 250 |
1 files changed, 81 insertions, 169 deletions
diff --git a/src/gsttools/qgstreamervideowidget.cpp b/src/gsttools/qgstreamervideowidget.cpp index 6e65b3065..2d273c652 100644 --- a/src/gsttools/qgstreamervideowidget.cpp +++ b/src/gsttools/qgstreamervideowidget.cpp @@ -32,22 +32,11 @@ ****************************************************************************/ #include "qgstreamervideowidget_p.h" -#include <private/qgstutils_p.h> #include <QtCore/qcoreevent.h> #include <QtCore/qdebug.h> -#include <QtWidgets/qapplication.h> #include <QtGui/qpainter.h> -#include <gst/gst.h> - -#if !GST_CHECK_VERSION(1,0,0) -#include <gst/interfaces/xoverlay.h> -#include <gst/interfaces/propertyprobe.h> -#else -#include <gst/video/videooverlay.h> -#endif - QT_BEGIN_NAMESPACE class QGstreamerVideoWidget : public QWidget @@ -82,167 +71,133 @@ public: } } -protected: - void paintEvent(QPaintEvent *) + void paint_helper() { QPainter painter(this); painter.fillRect(rect(), palette().background()); } +protected: + void paintEvent(QPaintEvent *) + { + paint_helper(); + } + QSize m_nativeSize; }; -QGstreamerVideoWidgetControl::QGstreamerVideoWidgetControl(QObject *parent) +QGstreamerVideoWidgetControl::QGstreamerVideoWidgetControl(QObject *parent, const QByteArray &elementName) : QVideoWidgetControl(parent) - , m_videoSink(0) + , m_videoOverlay(this, !elementName.isEmpty() ? elementName : qgetenv("QT_GSTREAMER_WIDGET_VIDEOSINK")) , m_widget(0) + , m_stopped(false) + , m_windowId(0) , m_fullScreen(false) { - // The QWidget needs to have a native X window handle to be able to use xvimagesink. - // Bail out if Qt is not using xcb (the control will then be ignored by the plugin) - if (QGuiApplication::platformName().compare(QLatin1String("xcb"), Qt::CaseInsensitive) == 0) - m_videoSink = gst_element_factory_make ("xvimagesink", NULL); - - if (m_videoSink) { - // Check if the xv sink is usable - if (gst_element_set_state(m_videoSink, GST_STATE_READY) != GST_STATE_CHANGE_SUCCESS) { - gst_object_unref(GST_OBJECT(m_videoSink)); - m_videoSink = 0; - } else { - gst_element_set_state(m_videoSink, GST_STATE_NULL); - g_object_set(G_OBJECT(m_videoSink), "force-aspect-ratio", 1, (const char*)NULL); - qt_gst_object_ref_sink(GST_OBJECT (m_videoSink)); //Take ownership - } - } + 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() { - if (m_videoSink) - gst_object_unref(GST_OBJECT(m_videoSink)); - delete m_widget; } void QGstreamerVideoWidgetControl::createVideoWidget() { - if (!m_videoSink || m_widget) + if (m_widget) return; m_widget = new QGstreamerVideoWidget; m_widget->installEventFilter(this); - m_windowId = m_widget->winId(); + m_videoOverlay.setWindowHandle(m_windowId = m_widget->winId()); } GstElement *QGstreamerVideoWidgetControl::videoSink() { - return m_videoSink; + return m_videoOverlay.videoSink(); } -bool QGstreamerVideoWidgetControl::eventFilter(QObject *object, QEvent *e) +void QGstreamerVideoWidgetControl::onOverlayActiveChanged() { - if (m_widget && object == m_widget) { - if (e->type() == QEvent::ParentChange || e->type() == QEvent::Show) { - WId newWId = m_widget->winId(); - if (newWId != m_windowId) { - m_windowId = newWId; - setOverlay(); - } - } - - if (e->type() == QEvent::Show) { - // Setting these values ensures smooth resizing since it - // will prevent the system from clearing the background - m_widget->setAttribute(Qt::WA_NoSystemBackground, true); - } else if (e->type() == QEvent::Resize) { - // This is a workaround for missing background repaints - // when reducing window size - windowExposed(); - } - } + updateWidgetAttributes(); +} - return false; +void QGstreamerVideoWidgetControl::stopRenderer() +{ + m_stopped = true; + updateWidgetAttributes(); + m_widget->setNativeSize(QSize()); } -bool QGstreamerVideoWidgetControl::processSyncMessage(const QGstreamerMessage &message) +void QGstreamerVideoWidgetControl::onNativeVideoSizeChanged() { - GstMessage* gm = message.rawMessage(); - -#if !GST_CHECK_VERSION(1,0,0) - if (gm && (GST_MESSAGE_TYPE(gm) == GST_MESSAGE_ELEMENT) && - gst_structure_has_name(gm->structure, "prepare-xwindow-id")) { -#else - if (gm && (GST_MESSAGE_TYPE(gm) == GST_MESSAGE_ELEMENT) && - gst_structure_has_name(gst_message_get_structure(gm), "prepare-window-handle")) { -#endif - setOverlay(); - QMetaObject::invokeMethod(this, "updateNativeVideoSize", Qt::QueuedConnection); - return true; - } + const QSize &size = m_videoOverlay.nativeVideoSize(); - return false; + if (size.isValid()) + m_stopped = false; + + if (m_widget) + m_widget->setNativeSize(size); } -bool QGstreamerVideoWidgetControl::processBusMessage(const QGstreamerMessage &message) +bool QGstreamerVideoWidgetControl::eventFilter(QObject *object, QEvent *e) { - GstMessage* gm = message.rawMessage(); + 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 (GST_MESSAGE_TYPE(gm) == GST_MESSAGE_STATE_CHANGED && - GST_MESSAGE_SRC(gm) == GST_OBJECT_CAST(m_videoSink)) { - GstState oldState; - GstState newState; - gst_message_parse_state_changed(gm, &oldState, &newState, 0); + if (e->type() == QEvent::Paint) { + if (m_videoOverlay.isActive()) + m_videoOverlay.expose(); // triggers a repaint of the last frame + else + m_widget->paint_helper(); // paints the black background - if (oldState == GST_STATE_READY && newState == GST_STATE_PAUSED) - updateNativeVideoSize(); + return true; + } } return false; } -void QGstreamerVideoWidgetControl::setOverlay() +void QGstreamerVideoWidgetControl::updateWidgetAttributes() { -#if !GST_CHECK_VERSION(1,0,0) - if (m_videoSink && GST_IS_X_OVERLAY(m_videoSink)) { - gst_x_overlay_set_xwindow_id(GST_X_OVERLAY(m_videoSink), m_windowId); - } -#else - if (m_videoSink && GST_IS_VIDEO_OVERLAY(m_videoSink)) { - gst_video_overlay_set_window_handle(GST_VIDEO_OVERLAY(m_videoSink), m_windowId); + // 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(); } -#endif } -void QGstreamerVideoWidgetControl::updateNativeVideoSize() +bool QGstreamerVideoWidgetControl::processSyncMessage(const QGstreamerMessage &message) { - if (m_videoSink) { - //find video native size to update video widget size hint - GstPad *pad = gst_element_get_static_pad(m_videoSink, "sink"); - GstCaps *caps = qt_gst_pad_get_current_caps(pad); - - gst_object_unref(GST_OBJECT(pad)); - - if (caps) { - m_widget->setNativeSize(QGstUtils::capsCorrectedResolution(caps)); - gst_caps_unref(caps); - } - } else { - if (m_widget) - m_widget->setNativeSize(QSize()); - } + return m_videoOverlay.processSyncMessage(message); } - -void QGstreamerVideoWidgetControl::windowExposed() +bool QGstreamerVideoWidgetControl::processBusMessage(const QGstreamerMessage &message) { -#if !GST_CHECK_VERSION(1,0,0) - if (m_videoSink && GST_IS_X_OVERLAY(m_videoSink)) - gst_x_overlay_expose(GST_X_OVERLAY(m_videoSink)); -#else - if (m_videoSink && GST_IS_VIDEO_OVERLAY(m_videoSink)) - gst_video_overlay_expose(GST_VIDEO_OVERLAY(m_videoSink)); -#endif + return m_videoOverlay.processBusMessage(message); } QWidget *QGstreamerVideoWidgetControl::videoWidget() @@ -253,19 +208,12 @@ QWidget *QGstreamerVideoWidgetControl::videoWidget() Qt::AspectRatioMode QGstreamerVideoWidgetControl::aspectRatioMode() const { - return m_aspectRatioMode; + return m_videoOverlay.aspectRatioMode(); } void QGstreamerVideoWidgetControl::setAspectRatioMode(Qt::AspectRatioMode mode) { - if (m_videoSink) { - g_object_set(G_OBJECT(m_videoSink), - "force-aspect-ratio", - (mode == Qt::KeepAspectRatio), - (const char*)NULL); - } - - m_aspectRatioMode = mode; + m_videoOverlay.setAspectRatioMode(mode); } bool QGstreamerVideoWidgetControl::isFullScreen() const @@ -280,78 +228,42 @@ void QGstreamerVideoWidgetControl::setFullScreen(bool fullScreen) int QGstreamerVideoWidgetControl::brightness() const { - int brightness = 0; - - if (m_videoSink && g_object_class_find_property(G_OBJECT_GET_CLASS(m_videoSink), "brightness")) - g_object_get(G_OBJECT(m_videoSink), "brightness", &brightness, NULL); - - return brightness / 10; + return m_videoOverlay.brightness(); } void QGstreamerVideoWidgetControl::setBrightness(int brightness) { - if (m_videoSink && g_object_class_find_property(G_OBJECT_GET_CLASS(m_videoSink), "brightness")) { - g_object_set(G_OBJECT(m_videoSink), "brightness", brightness * 10, NULL); - - emit brightnessChanged(brightness); - } + m_videoOverlay.setBrightness(brightness); } int QGstreamerVideoWidgetControl::contrast() const { - int contrast = 0; - - if (m_videoSink && g_object_class_find_property(G_OBJECT_GET_CLASS(m_videoSink), "contrast")) - g_object_get(G_OBJECT(m_videoSink), "contrast", &contrast, NULL); - - return contrast / 10; + return m_videoOverlay.contrast(); } void QGstreamerVideoWidgetControl::setContrast(int contrast) { - if (m_videoSink && g_object_class_find_property(G_OBJECT_GET_CLASS(m_videoSink), "contrast")) { - g_object_set(G_OBJECT(m_videoSink), "contrast", contrast * 10, NULL); - - emit contrastChanged(contrast); - } + m_videoOverlay.setContrast(contrast); } int QGstreamerVideoWidgetControl::hue() const { - int hue = 0; - - if (m_videoSink && g_object_class_find_property(G_OBJECT_GET_CLASS(m_videoSink), "hue")) - g_object_get(G_OBJECT(m_videoSink), "hue", &hue, NULL); - - return hue / 10; + return m_videoOverlay.hue(); } void QGstreamerVideoWidgetControl::setHue(int hue) { - if (m_videoSink && g_object_class_find_property(G_OBJECT_GET_CLASS(m_videoSink), "hue")) { - g_object_set(G_OBJECT(m_videoSink), "hue", hue * 10, NULL); - - emit hueChanged(hue); - } + m_videoOverlay.setHue(hue); } int QGstreamerVideoWidgetControl::saturation() const { - int saturation = 0; - - if (m_videoSink && g_object_class_find_property(G_OBJECT_GET_CLASS(m_videoSink), "saturation")) - g_object_get(G_OBJECT(m_videoSink), "saturation", &saturation, NULL); - - return saturation / 10; + return m_videoOverlay.saturation(); } void QGstreamerVideoWidgetControl::setSaturation(int saturation) { - if (m_videoSink && g_object_class_find_property(G_OBJECT_GET_CLASS(m_videoSink), "saturation")) { - g_object_set(G_OBJECT(m_videoSink), "saturation", saturation * 10, NULL); - - emit saturationChanged(saturation); - } + m_videoOverlay.setSaturation(saturation); } QT_END_NAMESPACE |