Work on flexible mode and screen sharing.

webrtc/modules/rtp_rtcp/source/rtp_format_vp9.cc

Index: webrtc/modules/rtp_rtcp/source/rtp_format_vp9.cc
diff --git a/webrtc/modules/rtp_rtcp/source/rtp_format_vp9.cc b/webrtc/modules/rtp_rtcp/source/rtp_format_vp9.cc
index ed30fc1c7188e2989a79f5e05f06ca07081a3765..467de10cd3622f1b9395f48132b60bb4bcdb98b9 100644
--- a/webrtc/modules/rtp_rtcp/source/rtp_format_vp9.cc
+++ b/webrtc/modules/rtp_rtcp/source/rtp_format_vp9.cc
@@ -748,7 +748,8 @@ bool RtpDepacketizerVp9::Parse(ParsedPayload* parsed_payload,
       parsed_payload->type.Video.height = vp9->height[0];
     }
   }
-  parsed_payload->type.Video.isFirstPacket = b_bit && (vp9->spatial_idx == 0);
+  parsed_payload->type.Video.isFirstPacket =
+      b_bit && (!l_bit || !vp9->inter_layer_predicted);

[stefan-webrtc, 2015/10/28 13:59:04]

Add a test for this

[philipel1, 2015/10/29 14:49:26]

Hmm... if I add a function to test this we either have to reparse the payload
(if we only pass the payload as a parameter) or we have to check if the l_bit is
true before calling the function with the RTPVideoHeaderVP9 object since
RTPVideoHeaderVP9 does not hold that information.

 
   uint64_t rem_bits = parser.RemainingBitCount();
   assert(rem_bits % 8 == 0);