Using different sequence numbers for different SSRCs

webrtc/test/layer_filtering_transport.cc

Index: webrtc/test/layer_filtering_transport.cc
diff --git a/webrtc/test/layer_filtering_transport.cc b/webrtc/test/layer_filtering_transport.cc
index 5ad3f8ce6a3f3527ae436d31dbe3301ae9b31a13..83edcac327f0ddc1a54d9993b16b26fcb4ed649c 100644
--- a/webrtc/test/layer_filtering_transport.cc
+++ b/webrtc/test/layer_filtering_transport.cc
@@ -29,9 +29,16 @@ LayerFilteringTransport::LayerFilteringTransport(
       vp8_video_payload_type_(vp8_video_payload_type),
       vp9_video_payload_type_(vp9_video_payload_type),
       tl_discard_threshold_(tl_discard_threshold),
-      sl_discard_threshold_(sl_discard_threshold),
-      current_seq_num_(10000) {
-}  // TODO(ivica): random seq num?
+      sl_discard_threshold_(sl_discard_threshold) {
+}
+
+uint16_t LayerFilteringTransport::NextSequenceNumber(uint32_t ssrc) {
+  auto it = current_seq_nums_.find(ssrc);
+  if (it == current_seq_nums_.end())
+    return current_seq_nums_[ssrc] = 10000;
+  else

[sprang_webrtc, 2015/09/23 13:58:19]

don't need this else

[ivica, 2015/10/07 12:07:41]

Done.

+    return ++it->second;
+}
 
 bool LayerFilteringTransport::SendRtp(const uint8_t* packet, size_t length) {
   if (tl_discard_threshold_ == 0 && sl_discard_threshold_ == 0) {
@@ -89,10 +96,9 @@ bool LayerFilteringTransport::SendRtp(const uint8_t* packet, size_t length) {
   if (set_marker_bit) {
     temp_buffer[1] |= kRtpMarkerBitMask;
   }

[sprang_webrtc, 2015/09/23 13:58:19]

Remove {}

[ivica, 2015/10/07 12:07:41]

Done.

-  ByteWriter<uint16_t>::WriteBigEndian(&temp_buffer[2], current_seq_num_);
-
-  ++current_seq_num_;  // Increase only if packet not discarded.
 
+  uint16_t seq_num = NextSequenceNumber(header.ssrc);
+  ByteWriter<uint16_t>::WriteBigEndian(&temp_buffer[2], seq_num);
   return test::DirectTransport::SendRtp(temp_buffer, length);
 }