Enable passing receive stream ID to the decoder factory.

webrtc/api/rtpparameters.h

Index: webrtc/api/rtpparameters.h
diff --git a/webrtc/api/rtpparameters.h b/webrtc/api/rtpparameters.h
index 5c79ab4e9df571f1f4ef7c315c6efc4024bae84c..6263d49079fcf0845020ec3f2fe23e992f22b8f4 100644
--- a/webrtc/api/rtpparameters.h
+++ b/webrtc/api/rtpparameters.h
@@ -47,9 +47,10 @@ struct RtpCodecParameters {
 struct RtpParameters {
   std::vector<RtpEncodingParameters> encodings;
   std::vector<RtpCodecParameters> codecs;
+  std::vector<uint32_t> ssrcs;

[pthatcher1, 2016/06/15 19:40:00]

This should match the standard here:

http://w3c.github.io/webrtc-pc/#idl-def-rtcrtpencodingparameters

Which means that RtpEncodingParameters should have one ssrc.  And RtpParameters
should have any SSRCs, only through the RtpEncodingParameters.

[perkj_webrtc, 2016/06/15 20:25:52]

Why is this needed?

[pthatcher1, 2016/06/15 21:08:17]

It's part of the standard.  If you want an explanation of why it's in the
standard, well, that will take a long time :).  Mostly it's useful for apps to
know, and in a later version of WebRTC/ORTC, to set.

 
   bool operator==(const RtpParameters& o) const {
-    return encodings == o.encodings && codecs == o.codecs;
+    return encodings == o.encodings && codecs == o.codecs && ssrcs == o.ssrcs;
   }
   bool operator!=(const RtpParameters& o) const { return !(*this == o); }
 };