From d9a294ac9f44a23d2d2fe2598cc9c0f33b667a1c Mon Sep 17 00:00:00 2001
From: Carlos Rafael Giani <dv@pseudoterminal.org>
Date: Sun, 21 May 2017 16:01:14 +0200
Subject: [PATCH] qmlglsink: Add itemInitialized signal to QML item

This is useful for autoplay for example. With autoplay, it is necessary to
wait until the scene graph is fully set up. This signal is emitted once the
QML item node is ready. So, inside a connected slot, the pipeline's state
can be set to PLAYING to automatically start playback as soon as the QML
script is loaded.

https://bugzilla.gnome.org/show_bug.cgi?id=786246
---
 ext/qt/qtitem.cc | 2 ++
 ext/qt/qtitem.h  | 3 +++
 2 files changed, 5 insertions(+)

diff --git a/ext/qt/qtitem.cc b/ext/qt/qtitem.cc
index 5806bbcff3..b20a6fb5da 100644
--- a/ext/qt/qtitem.cc
+++ b/ext/qt/qtitem.cc
@@ -289,6 +289,8 @@ QtGLVideoItem::onSceneGraphInitialized ()
 
   GST_DEBUG ("%p created wrapped GL context %" GST_PTR_FORMAT, this,
       this->priv->other_context);
+
+  emit itemInitialized();
 }
 
 void
diff --git a/ext/qt/qtitem.h b/ext/qt/qtitem.h
index b322068f3a..8cffc24454 100644
--- a/ext/qt/qtitem.h
+++ b/ext/qt/qtitem.h
@@ -77,6 +77,9 @@ public:
     /* private for C interface ... */
     QtGLVideoItemPrivate *priv;
 
+Q_SIGNALS:
+    void itemInitialized();
+
 private Q_SLOTS:
     void handleWindowChanged(QQuickWindow * win);
     void onSceneGraphInitialized();