qmlglsrc: Add qmlglsrc unit test example

https://bugzilla.gnome.org/show_bug.cgi?id=768160

tests/examples/qt/qmlsink/main.cpp

@@ -44,18 +44,15 @@ int main(int argc, char *argv[])
 
   GstElement *pipeline = gst_pipeline_new (NULL);
   GstElement *src = gst_element_factory_make ("videotestsrc", NULL);
+  GstElement *glupload = gst_element_factory_make ("glupload", NULL);
   /* the plugin must be loaded before loading the qml file to register the
    * GstGLVideoItem qml item */
   GstElement *sink = gst_element_factory_make ("qmlglsink", NULL);
-  GstElement *sinkbin = gst_element_factory_make ("glsinkbin", NULL);
 
-  g_assert (src && sink && sinkbin);
+  g_assert (src && glupload && sink);
 
-  g_object_set (sinkbin, "sink", sink, NULL);
+  gst_bin_add_many (GST_BIN (pipeline), src, glupload, sink, NULL);
-  g_object_unref (sink);
+  gst_element_link_many (src, glupload, sink, NULL);
-
-  gst_bin_add_many (GST_BIN (pipeline), src, sinkbin, NULL);
-  gst_element_link_many (src, sinkbin, NULL);
 
   QQmlApplicationEngine engine;
   engine.load(QUrl(QStringLiteral("qrc:/main.qml")));

tests/examples/qt/qmlsrc/.gitignore

@@ -0,0 +1,2 @@
+grabqml
+qrc_qml.cpp

tests/examples/qt/qmlsrc/grabqml.pro

@@ -0,0 +1,20 @@
+TEMPLATE = app
+
+QT += qml quick widgets
+
+QT_CONFIG -= no-pkg-config
+CONFIG += link_pkgconfig debug
+PKGCONFIG = \
+    gstreamer-1.0 \
+    gstreamer-video-1.0
+
+DEFINES += GST_USE_UNSTABLE_API
+
+INCLUDEPATH += ../lib
+
+SOURCES += main.cpp
+
+RESOURCES += qml.qrc
+
+# Additional import path used to resolve QML modules in Qt Creator's code model
+QML_IMPORT_PATH =

tests/examples/qt/qmlsrc/main.cpp

@@ -0,0 +1,80 @@
+#include <QApplication>
+#include <QQmlApplicationEngine>
+#include <QQuickWindow>
+#include <QQuickItem>
+#include <QQuickView>
+#include <QRunnable>
+#include <QDebug>
+#include <gst/gst.h>
+
+class SetPlaying : public QRunnable
+{
+public:
+  SetPlaying(GstElement *);
+  ~SetPlaying();
+
+  void run ();
+
+private:
+  GstElement * pipeline_;
+};
+
+SetPlaying::SetPlaying (GstElement * pipeline)
+{
+  this->pipeline_ = pipeline ? static_cast<GstElement *> (gst_object_ref (pipeline)) : NULL;
+}
+
+SetPlaying::~SetPlaying ()
+{
+  if (this->pipeline_)
+    gst_object_unref (this->pipeline_);
+  
+}
+
+void
+SetPlaying::run ()
+{
+  if (this->pipeline_)
+    gst_element_set_state (this->pipeline_, GST_STATE_PLAYING);
+}
+
+int main(int argc, char *argv[])
+{
+  int ret;
+
+  QGuiApplication app(argc, argv);
+  gst_init (&argc, &argv);
+
+  GstElement *pipeline = gst_pipeline_new (NULL);
+  GstElement *src = gst_element_factory_make ("qmlglsrc", NULL);
+  GstElement *sink = gst_element_factory_make ("glimagesink", NULL); 
+
+  g_assert (src && sink);
+
+  gst_bin_add_many (GST_BIN (pipeline), src, sink, NULL);
+  gst_element_link_many (src, sink, NULL);
+
+  QQmlApplicationEngine engine;
+  engine.load(QUrl(QStringLiteral("qrc:/main.qml")));
+
+  QQuickWindow *rootObject;
+
+  /* find and set the QQuickWindow on the src */
+  rootObject = static_cast<QQuickWindow *> (engine.rootObjects().first());
+  g_object_set(src, "window", rootObject, NULL);
+  g_object_set(src, "use-default-fbo", TRUE, NULL);
+  /* output buffer of qmlglsrc is vertical flip, get the image orientation tag */
+  g_object_set(sink, "rotate-method", 8, NULL);
+
+  rootObject->scheduleRenderJob (new SetPlaying (pipeline),
+      QQuickWindow::BeforeSynchronizingStage);
+
+  ret = app.exec();
+
+  gst_element_set_state (pipeline, GST_STATE_NULL);
+  gst_object_unref (pipeline);
+
+  gst_deinit ();
+
+  return ret;
+}

tests/examples/qt/qmlsrc/main.qml

@@ -0,0 +1,65 @@
+import QtQuick 2.4
+import QtQuick.Controls 1.1
+import QtQuick.Controls.Styles 1.1
+import QtQuick.Dialogs 1.1
+import QtQuick.Window 2.1
+
+ApplicationWindow {
+    id: window
+    visible: true
+    width: 640
+    height: 480
+    x: 30
+    y: 30
+    color: "dodgerblue"
+
+    Item {
+        anchors.fill: parent
+
+        Rectangle {
+            color: Qt.rgba(1, 1, 1, 0.7)
+            border.width: 1
+            border.color: "white"
+            anchors.bottomMargin: 15
+            anchors.horizontalCenter: parent.horizontalCenter
+            width : parent.width - 30
+            height: parent.height - 30
+            radius: 8
+
+            Text {
+                id: text1
+                anchors.centerIn: parent
+                text: "Hello World!"
+                font.pointSize: 24
+                visible: timer.tex1_visible
+            }
+
+            Text {
+                id: text2
+                anchors.centerIn: parent
+                text: "This is qmlglsrc demo!"
+                font.pointSize: 24
+                visible: timer.tex2_visible
+            }
+
+            Timer {
+                id: timer
+                property int count: 0
+                property int tex1_visible: 1
+                property int tex2_visible: 0
+                interval: 30; running: true; repeat: true
+                onTriggered: {
+                  count++;
+                  if (count%2 == 0) {
+                    tex1_visible = 1;
+                    tex2_visible = 0;
+                  }
+                  else {
+                    tex1_visible = 0;
+                    tex2_visible = 1;
+                  }
+                }
+            }
+        }
+    }
+}

tests/examples/qt/qmlsrc/qml.qrc

@@ -0,0 +1,5 @@
+<RCC>
+    <qresource prefix="/">
+        <file>main.qml</file>
+    </qresource>
+</RCC>