Pass SdpAudioFormat through Channel, without converting to CodecInst

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 8a78069609b6588692e987634eadd20b14a1318b..3cc74a7048ac8bbe73e6c255725992e080b73d52 100644
--- a/webrtc/voice_engine/channel_proxy.h
+++ b/webrtc/voice_engine/channel_proxy.h
@@ -74,6 +74,7 @@ class ChannelProxy {
                                                 int payload_frequency);
   virtual bool SendTelephoneEventOutband(int event, int duration_ms);
   virtual void SetBitrate(int bitrate_bps, int64_t probing_interval_ms);
+  virtual int SetRecPayloadType(int payload_type, const SdpAudioFormat& format);

[the sun, 2016/12/08 10:53:53]

remove return code since you're not checking it in AudioReceiveStream. DCHECK it
in the impl instead.

[kwiberg-webrtc, 2016/12/09 02:39:02]

Done.

   virtual void SetSink(std::unique_ptr<AudioSinkInterface> sink);
   virtual void SetInputMute(bool muted);
   virtual void RegisterExternalTransport(Transport* transport);