Disconnect all signals from QVideoSink before unregistering sources

gstreamer implementation of QPlatformVideoSink emits signals to
QVideoSink on the call to unregisterSource(). This causes ASSERT
failure as QVideoSink is being destroyed at that time.
Disconnecting all signals from QVideSink before calling
unregisterSource() prevents this.

Change-Id: I137bef89ec84e166b9d2c176680d4cde1abbdea2
Reviewed-by: Lars Knoll <lars@knoll.priv.no>
(cherry picked from commit b34c8fb3e637a02ef9c49f3c6b7f58254d2d6136)
Reviewed-by: Qt Cherry-pick Bot <cherrypick_bot@qt-project.org>

1 files changed, 1 insertions, 0 deletions

diff --git a/src/multimedia/video/qvideosink.cpp b/src/multimedia/video/qvideosink.cpp
index 1c91f455d..83a70964a 100644
--- a/src/multimedia/video/qvideosink.cpp
+++ b/src/multimedia/video/qvideosink.cpp
@@ -91,6 +91,7 @@ QVideoSink::QVideoSink(QObject *parent)
  */
 QVideoSink::~QVideoSink()
 {
+    disconnect(this);
     d->unregisterSource();
     delete d;
 }