AcmReceiver: Look up last decoder in NetEq's table of decoders

webrtc/modules/audio_coding/neteq/include/neteq.h

Index: webrtc/modules/audio_coding/neteq/include/neteq.h
diff --git a/webrtc/modules/audio_coding/neteq/include/neteq.h b/webrtc/modules/audio_coding/neteq/include/neteq.h
index cae56b386273c56fe00385d841fa3fa5849886cb..1f6205f1e4046023e329bbec26c2839f10a5d3d5 100644
--- a/webrtc/modules/audio_coding/neteq/include/neteq.h
+++ b/webrtc/modules/audio_coding/neteq/include/neteq.h
@@ -252,6 +252,8 @@ class NetEq {
   // (Config::sample_rate_hz) is returned.
   virtual int last_output_sample_rate_hz() const = 0;
 
+  virtual rtc::Optional<CodecInst> GetDecoder(int payload_type) const = 0;

[ossu, 2016/09/16 12:10:05]

On second thought, should this one maybe be called GetCodecInst or the like,
instead? We're not getting a NetEqDecoder nor an AudioDecoder from it.

+
   // Not implemented.
   virtual int SetTargetNumberOfChannels() = 0;