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https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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qt: Add navigation events support
Currently handles only mouse events. Part-of: <https://gitlab.freedesktop.org/gstreamer/gst-plugins-good/-/merge_requests/567>
This commit is contained in:
Philippe Normand
parent
a9bb6d4572
commit
5f1b290fe8
3 changed files with 239 additions and 6 deletions
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@ -81,6 +81,7 @@
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#define GST_CAT_DEFAULT gst_debug_qt_gl_sink
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GST_DEBUG_CATEGORY (GST_CAT_DEFAULT);
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static void gst_qt_sink_navigation_interface_init (GstNavigationInterface * iface);
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static void gst_qt_sink_finalize (GObject * object);
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static void gst_qt_sink_set_property (GObject * object, guint prop_id,
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const GValue * value, GParamSpec * param_spec);
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@ -134,7 +135,9 @@ enum
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#define gst_qt_sink_parent_class parent_class
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G_DEFINE_TYPE_WITH_CODE (GstQtSink, gst_qt_sink,
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GST_TYPE_VIDEO_SINK, GST_DEBUG_CATEGORY_INIT (GST_CAT_DEFAULT,
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"qtsink", 0, "Qt Video Sink"));
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"qtsink", 0, "Qt Video Sink");
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G_IMPLEMENT_INTERFACE (GST_TYPE_NAVIGATION,
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gst_qt_sink_navigation_interface_init));
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GST_ELEMENT_REGISTER_DEFINE_WITH_CODE (qmlglsink, "qmlglsink",
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GST_RANK_NONE, GST_TYPE_QT_SINK, qt5_element_init (plugin));
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@ -194,6 +197,8 @@ static void
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gst_qt_sink_init (GstQtSink * qt_sink)
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{
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qt_sink->widget = QSharedPointer<QtGLVideoItemInterface>();
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if (qt_sink->widget)
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qt_sink->widget->setSink (GST_ELEMENT_CAST (qt_sink));
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}
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static void
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@ -205,10 +210,14 @@ gst_qt_sink_set_property (GObject * object, guint prop_id,
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switch (prop_id) {
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case PROP_WIDGET: {
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QtGLVideoItem *qt_item = static_cast<QtGLVideoItem *> (g_value_get_pointer (value));
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if (qt_item)
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if (qt_item) {
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qt_sink->widget = qt_item->getInterface();
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else
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if (qt_sink->widget) {
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qt_sink->widget->setSink (GST_ELEMENT_CAST (qt_sink));
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}
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} else {
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qt_sink->widget.clear();
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}
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break;
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}
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case PROP_FORCE_ASPECT_RATIO:
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@ -546,3 +555,33 @@ config_failed:
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return FALSE;
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}
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}
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static void
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gst_qt_sink_navigation_send_event (GstNavigation * navigation,
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GstStructure * structure)
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{
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GstQtSink *qt_sink = GST_QT_SINK (navigation);
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GstEvent *event;
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GstPad *pad;
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event = gst_event_new_navigation (structure);
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pad = gst_pad_get_peer (GST_VIDEO_SINK_PAD (qt_sink));
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GST_TRACE_OBJECT (qt_sink, "navigation event %" GST_PTR_FORMAT, structure);
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if (GST_IS_PAD (pad) && GST_IS_EVENT (event)) {
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if (!gst_pad_send_event (pad, gst_event_ref (event))) {
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/* If upstream didn't handle the event we'll post a message with it
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* for the application in case it wants to do something with it */
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gst_element_post_message (GST_ELEMENT_CAST (qt_sink),
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gst_navigation_message_new_event (GST_OBJECT_CAST (qt_sink), event));
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}
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gst_event_unref (event);
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gst_object_unref (pad);
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}
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}
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static void gst_qt_sink_navigation_interface_init (GstNavigationInterface * iface)
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{
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iface->send_event = gst_qt_sink_navigation_send_event;
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}
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187
ext/qt/qtitem.cc
187
ext/qt/qtitem.cc
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@ -37,9 +37,8 @@
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#include <QtQuick/QSGSimpleTextureNode>
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/**
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* SECTION:gtkgstglwidget
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* @short_description: a #GtkGLArea that renders GStreamer video #GstBuffers
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* @see_also: #GtkGLArea, #GstBuffer
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* SECTION:QtGLVideoItem
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* @short_description: a Qt5 QtQuick item that renders GStreamer video #GstBuffers
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*
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* #QtGLVideoItem is an #QQuickItem that renders GStreamer video buffers.
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*/
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@ -66,6 +65,8 @@ struct _QtGLVideoItemPrivate
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gboolean force_aspect_ratio;
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gint par_n, par_d;
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GWeakRef sink;
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gint display_width;
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gint display_height;
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@ -129,6 +130,8 @@ QtGLVideoItem::QtGLVideoItem()
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g_mutex_init (&this->priv->lock);
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g_weak_ref_init (&priv->sink, NULL);
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this->priv->display = gst_qt_get_gl_display(TRUE);
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connect(this, SIGNAL(windowChanged(QQuickWindow*)), this,
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@ -136,6 +139,10 @@ QtGLVideoItem::QtGLVideoItem()
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this->proxy = QSharedPointer<QtGLVideoItemInterface>(new QtGLVideoItemInterface(this));
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setFlag(ItemHasContents, true);
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setAcceptedMouseButtons(Qt::AllButtons);
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setAcceptHoverEvents(true);
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GST_DEBUG ("%p init Qt Video Item", this);
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}
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@ -171,6 +178,9 @@ QtGLVideoItem::~QtGLVideoItem()
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gst_buffer_replace (&this->priv->buffer, NULL);
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gst_caps_replace (&this->priv->caps, NULL);
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g_weak_ref_clear (&this->priv->sink);
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g_free (this->priv);
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this->priv = NULL;
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}
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@ -305,6 +315,165 @@ QtGLVideoItem::updatePaintNode(QSGNode * oldNode,
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return texNode;
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}
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/* This method has to be invoked with the the priv->lock taken */
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void
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QtGLVideoItem::fitStreamToAllocatedSize(GstVideoRectangle * result)
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{
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if (this->priv->force_aspect_ratio) {
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GstVideoRectangle src, dst;
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src.x = 0;
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src.y = 0;
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src.w = this->priv->display_width;
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src.h = this->priv->display_height;
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dst.x = 0;
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dst.y = 0;
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dst.w = size().width();
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dst.h = size().height();
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gst_video_sink_center_rect (src, dst, result, TRUE);
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} else {
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result->x = 0;
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result->y = 0;
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result->w = size().width();
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result->h = size().height();
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}
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}
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/* This method has to be invoked with the the priv->lock taken */
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QPointF
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QtGLVideoItem::mapPointToStreamSize(QPointF pos)
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{
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gdouble stream_width, stream_height;
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GstVideoRectangle result;
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double stream_x, stream_y;
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double x, y;
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fitStreamToAllocatedSize(&result);
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stream_width = (gdouble) GST_VIDEO_INFO_WIDTH (&this->priv->v_info);
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stream_height = (gdouble) GST_VIDEO_INFO_HEIGHT (&this->priv->v_info);
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x = pos.x();
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y = pos.y();
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/* from display coordinates to stream coordinates */
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if (result.w > 0)
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stream_x = (x - result.x) / result.w * stream_width;
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else
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stream_x = 0.;
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/* clip to stream size */
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stream_x = CLAMP(stream_x, 0., stream_width);
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/* same for y-axis */
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if (result.h > 0)
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stream_y = (y - result.y) / result.h * stream_height;
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else
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stream_y = 0.;
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stream_y = CLAMP(stream_y, 0., stream_height);
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GST_TRACE ("transform %fx%f into %fx%f", x, y, stream_x, stream_y);
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return QPointF(stream_x, stream_y);
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}
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void
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QtGLVideoItem::wheelEvent(QWheelEvent * event)
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{
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g_mutex_lock (&this->priv->lock);
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QPoint delta = event->angleDelta();
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GstElement *element = GST_ELEMENT_CAST (g_weak_ref_get (&this->priv->sink));
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if (element != NULL) {
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#if (QT_VERSION >= QT_VERSION_CHECK (5, 14, 0))
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auto position = event->position();
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#else
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auto position = *event;
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#endif
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gst_navigation_send_mouse_scroll_event (GST_NAVIGATION (element),
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position.x(), position.y(), delta.x(), delta.y());
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g_object_unref (element);
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}
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g_mutex_unlock (&this->priv->lock);
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}
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void
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QtGLVideoItem::hoverEnterEvent(QHoverEvent *)
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{
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m_hovering = true;
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}
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void
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QtGLVideoItem::hoverLeaveEvent(QHoverEvent *)
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{
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m_hovering = false;
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}
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void
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QtGLVideoItem::hoverMoveEvent(QHoverEvent * event)
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{
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if (!m_hovering)
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return;
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int button = !!m_mousePressedButton;
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g_mutex_lock (&this->priv->lock);
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if (event->pos() != event->oldPos()) {
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QPointF pos = mapPointToStreamSize(event->pos());
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GstElement *element = GST_ELEMENT_CAST (g_weak_ref_get (&this->priv->sink));
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if (element != NULL) {
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gst_navigation_send_mouse_event (GST_NAVIGATION (element), "mouse-move",
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button, pos.x(), pos.y());
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g_object_unref (element);
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}
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}
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g_mutex_unlock (&this->priv->lock);
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}
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void
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QtGLVideoItem::sendMouseEvent(QMouseEvent * event, const gchar * type)
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{
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int button = 0;
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switch (event->button()) {
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case Qt::LeftButton:
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button = 1;
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break;
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case Qt::RightButton:
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button = 2;
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break;
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default:
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break;
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}
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m_mousePressedButton = button;
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g_mutex_lock (&this->priv->lock);
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QPointF pos = mapPointToStreamSize(event->pos());
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gchar* event_type = g_strconcat ("mouse-button-", type, NULL);
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GstElement *element = GST_ELEMENT_CAST (g_weak_ref_get (&this->priv->sink));
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if (element != NULL) {
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gst_navigation_send_mouse_event (GST_NAVIGATION (element), event_type,
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button, pos.x(), pos.y());
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g_object_unref (element);
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}
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g_free (event_type);
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g_mutex_unlock (&this->priv->lock);
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}
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void
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QtGLVideoItem::mousePressEvent(QMouseEvent * event)
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{
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forceActiveFocus();
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sendMouseEvent(event, "press");
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}
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void
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QtGLVideoItem::mouseReleaseEvent(QMouseEvent * event)
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{
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sendMouseEvent(event, "release");
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}
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static void
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_reset (QtGLVideoItem * qt_item)
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{
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@ -327,6 +496,18 @@ _reset (QtGLVideoItem * qt_item)
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}
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}
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void
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QtGLVideoItemInterface::setSink (GstElement * sink)
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{
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QMutexLocker locker(&lock);
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if (qt_item == NULL)
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return;
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g_mutex_lock (&qt_item->priv->lock);
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g_weak_ref_set (&qt_item->priv->sink, sink);
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g_mutex_unlock (&qt_item->priv->lock);
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}
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void
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QtGLVideoItemInterface::setBuffer (GstBuffer * buffer)
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{
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@ -42,6 +42,7 @@ public:
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void invalidateRef();
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void setSink (GstElement * sink);
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void setBuffer (GstBuffer * buffer);
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gboolean setCaps (GstCaps *caps);
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gboolean initWinSys ();
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@ -98,6 +99,12 @@ private Q_SLOTS:
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protected:
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QSGNode * updatePaintNode (QSGNode * oldNode, UpdatePaintNodeData * updatePaintNodeData);
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void wheelEvent(QWheelEvent *) override;
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void hoverEnterEvent(QHoverEvent *) override;
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void hoverLeaveEvent (QHoverEvent *) override;
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void hoverMoveEvent (QHoverEvent *) override;
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void mousePressEvent(QMouseEvent*) override;
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void mouseReleaseEvent(QMouseEvent*) override;
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private:
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@ -105,8 +112,14 @@ private:
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void setViewportSize(const QSize &size);
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void shareContext();
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void fitStreamToAllocatedSize(GstVideoRectangle * result);
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QPointF mapPointToStreamSize(QPointF);
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void sendMouseEvent(QMouseEvent * event, const gchar * type);
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QSize m_viewportSize;
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bool m_openGlContextInitialized;
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bool m_hovering;
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uint32_t m_mousePressedButton;
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QSharedPointer<QtGLVideoItemInterface> proxy;
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};
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