decklinkvideosrc: don't crash if we get NULL video frames in the callback

For some reason we seem to sometimes get NULL video_frames in the
::VideoInputFrameArrived() callback, observed on Intensity Pro cards.

https://bugzilla.gnome.org/show_bug.cgi?id=747633

1 files changed, 6 insertions, 1 deletions

diff --git a/sys/decklink/gstdecklink.cpp b/sys/decklink/gstdecklink.cpp
index eb39bdb46..8a2f10144 100644
--- a/sys/decklink/gstdecklink.cpp
+++ b/sys/decklink/gstdecklink.cpp
@@ -484,6 +484,9 @@ public:
     BMDTimeValue capture_time, capture_duration;
     HRESULT res;
 
+    if (video_frame == NULL)
+      goto no_video_frame;
+
     res =
         video_frame->GetHardwareReferenceTimestamp (GST_SECOND, &capture_time,
         &capture_duration);
@@ -522,7 +525,9 @@ public:
           capture_duration);
     }
 
-    if (got_audio_packet && audiosrc) {
+no_video_frame:
+
+    if (audio_packet && got_audio_packet && audiosrc) {
       m_input->got_audio_packet (audiosrc, audio_packet, capture_time);
     }