rtprtxsend: Update statistics before pushing

If an element queries the number of retransmission buffers pushed
*while* the push is still taking place (and before the object lock
is taken just after) it would end up with the wrong statistic
being reported.

Increment it just before the push, avoids races when getting statistics

https://bugzilla.gnome.org/show_bug.cgi?id=768723

diff --git a/gst/rtpmanager/gstrtprtxsend.c b/gst/rtpmanager/gstrtprtxsend.c
index 5fb400d..2412c64 100644 (file)
--- a/gst/rtpmanager/gstrtprtxsend.c
+++ b/gst/rtpmanager/gstrtprtxsend.c
@@ -767,11 +767,12 @@ gst_rtp_rtx_send_src_loop (GstRtpRtxSend * rtx)
     GST_LOG_OBJECT (rtx, "pushing rtx buffer %p", data->object);
 
     if (G_LIKELY (GST_IS_BUFFER (data->object))) {
-      gst_pad_push (rtx->srcpad, GST_BUFFER (data->object));
-
       GST_OBJECT_LOCK (rtx);
+      /* Update statistics just before pushing. */
       rtx->num_rtx_packets++;
       GST_OBJECT_UNLOCK (rtx);
+
+      gst_pad_push (rtx->srcpad, GST_BUFFER (data->object));
     } else if (GST_IS_EVENT (data->object)) {
       gst_pad_push_event (rtx->srcpad, GST_EVENT (data->object));