Implemented the GetSources() in native code.

webrtc/voice_engine/channel_proxy.h

Index: webrtc/voice_engine/channel_proxy.h
diff --git a/webrtc/voice_engine/channel_proxy.h b/webrtc/voice_engine/channel_proxy.h
index 86b5e65304619a099b2d0cb22ba07f03700e7a35..e86f4e83f7b6077b55ec59d5bae0352796a32b83 100644
--- a/webrtc/voice_engine/channel_proxy.h
+++ b/webrtc/voice_engine/channel_proxy.h
@@ -36,6 +36,7 @@ class RtpRtcp;
 class RtpTransportControllerSendInterface;
 class Transport;
 class TransportFeedbackObserver;
+struct RtpSource;

[the sun, 2017/04/05 14:58:30]

Can't forward declare since propagating by-value. Include api/rtpreceiver.h
instead.

[Zhi Huang, 2017/04/06 03:09:50]

Done.

 
 namespace voe {
 
@@ -121,6 +122,7 @@ class ChannelProxy {
   virtual void OnRecoverableUplinkPacketLossRate(
       float recoverable_packet_loss_rate);
   virtual void RegisterLegacyReceiveCodecs();
+  virtual const std::vector<webrtc::RtpSource> GetSources();

[hbos, 2017/04/05 11:15:42]

Make the return value non-const since it's returned by value.

[Zhi Huang, 2017/04/06 03:09:50]

Done.

 
  private:
   Channel* channel() const;