[farsight2/master] rtcpfilter: Replace SR with empty RR if there was no RR

[Olivier Crête]

---
 gst/rtcpfilter/fs-rtcp-filter.c |   27 +++++++++++++++++++++++++--
 1 files changed, 25 insertions(+), 2 deletions(-)

diff --git a/gst/rtcpfilter/fs-rtcp-filter.c b/gst/rtcpfilter/fs-rtcp-filter.c
index e6abe54..2f5dfbc 100644
--- a/gst/rtcpfilter/fs-rtcp-filter.c
+++ b/gst/rtcpfilter/fs-rtcp-filter.c
@@ -38,6 +38,8 @@
 
 #include <gst/rtp/gstrtcpbuffer.h>
 
+#include <string.h>
+
 GST_DEBUG_CATEGORY (rtcp_filter_debug);
 #define GST_CAT_DEFAULT (rtcp_filter_debug)
 
@@ -203,9 +205,30 @@ fs_rtcp_filter_transform_ip (GstBaseTransform *transform, GstBuffer *buf)
       {
         if (gst_rtcp_packet_get_type (&packet) == GST_RTCP_TYPE_SR)
         {
-          if (!gst_rtcp_packet_remove (&packet))
-            break;
+          GstRTCPPacket nextpacket = packet;
+
           modified = TRUE;
+          gst_rtcp_packet_move_to_next (&nextpacket);
+          if (gst_rtcp_packet_get_type (&nextpacket) == GST_RTCP_TYPE_RR)
+          {
+            if (!gst_rtcp_packet_remove (&packet))
+              break;
+          }
+          else
+          {
+            guchar *data = GST_BUFFER_DATA (buf) + packet.offset;
+
+            /* If there is no RR, lets add an empty one */
+            data[0] = (GST_RTCP_VERSION << 6);
+            data[1] = GST_RTCP_TYPE_RR;
+            data[2] = 0;
+            data[3] = 1;
+            memmove (GST_BUFFER_DATA (buf) + packet.offset + 8,
+                GST_BUFFER_DATA (buf) + nextpacket.offset,
+                GST_BUFFER_SIZE (buf) - nextpacket.offset);
+            gst_rtcp_buffer_get_first_packet (buf, &packet);
+          }
+
         }
         else
         {
-- 
1.5.6.5