Adding support for simulcast and spatial layers into VideoQualityTest

webrtc/test/layer_filtering_transport.h

Index: webrtc/test/layer_filtering_transport.h
diff --git a/webrtc/test/layer_filtering_transport.h b/webrtc/test/layer_filtering_transport.h
index 58c2dd566ba81da178620f280a36ad1ec71210c3..dc3182af36dc85e771823963e93b8669825eea3e 100644
--- a/webrtc/test/layer_filtering_transport.h
+++ b/webrtc/test/layer_filtering_transport.h
@@ -24,8 +24,9 @@ class LayerFilteringTransport : public test::DirectTransport {
   LayerFilteringTransport(const FakeNetworkPipe::Config& config,
                           uint8_t vp8_video_payload_type,
                           uint8_t vp9_video_payload_type,
-                          uint8_t tl_discard_threshold,
-                          uint8_t sl_discard_threshold);
+                          int selected_tl,
+                          int selected_sl);
+  bool DiscardedLastPacket() const;
   bool SendRtp(const uint8_t* data,
                size_t length,
                const PacketOptions& options) override;
@@ -35,12 +36,13 @@ class LayerFilteringTransport : public test::DirectTransport {
   // Used to distinguish between VP8 and VP9.
   const uint8_t vp8_video_payload_type_;
   const uint8_t vp9_video_payload_type_;
-  // Discard all temporal/spatial layers with id greater or equal the
-  // threshold. 0 to disable.
-  const uint8_t tl_discard_threshold_;
-  const uint8_t sl_discard_threshold_;
+  // Discard or invalidate all temporal/spatial layers with id greater than the
+  // selected one. -1 to disable filtering.
+  const int selected_tl_;
+  const int selected_sl_;
   // Current sequence number for each SSRC separately.
   std::map<uint32_t, uint16_t> current_seq_nums_;
+  bool discarded_last_packet_;
 };
 
 }  // namespace test