Smooth BWE and pass it to Audio Network Adaptor.

webrtc/voice_engine/channel.h

Index: webrtc/voice_engine/channel.h
diff --git a/webrtc/voice_engine/channel.h b/webrtc/voice_engine/channel.h
index c86820f2a5d933ab2d039274ff4f91cd7e64f8cd..ddb2d8e4ad870b074c6181cfed3246e8c56c309d 100644
--- a/webrtc/voice_engine/channel.h
+++ b/webrtc/voice_engine/channel.h
@@ -17,6 +17,7 @@
 #include "webrtc/api/call/audio_sink.h"
 #include "webrtc/base/criticalsection.h"
 #include "webrtc/base/optional.h"
+#include "webrtc/base/smoothing_filter.h"
 #include "webrtc/common_audio/resampler/include/push_resampler.h"
 #include "webrtc/common_types.h"
 #include "webrtc/modules/audio_coding/acm2/codec_manager.h"
@@ -443,6 +444,8 @@ class Channel
   int GetRtpTimestampRateHz() const;
   int64_t GetRTT(bool allow_associate_channel) const;
 
+  void OnUplinkBandwidthUpdated(int bitrate_bps);
+
   rtc::CriticalSection _fileCritSect;
   rtc::CriticalSection _callbackCritSect;
   rtc::CriticalSection volume_settings_critsect_;
@@ -546,6 +549,8 @@ class Channel
 
   // TODO(ossu): Remove once GetAudioDecoderFactory() is no longer needed.
   rtc::scoped_refptr<AudioDecoderFactory> decoder_factory_;
+
+  SmoothingFilterImpl bitrate_bps_smoothed_;

[minyue-webrtc, 2016/11/15 14:36:03]

I hope to call this

uplink_bandwidth_estimator and write comment like "we estimate the uplink
bandwidth by smoothing out the target bit rate" at the proper place in
SetBitrate.

[stefan-webrtc, 2016/11/15 14:41:58]

I would prefer not using uplink bandwidth, as it's rather the average/smoothed
bitrate allocation for this audio stream. It would be good not to mix concepts.

[minyue-webrtc, 2016/11/16 08:56:45]

ok. Then please add "we give smoothed bitrate allocation to audio network
adaptor as the uplink bandwidth" when we call the unlink bandwidth method of
ANA.

[michaelt, 2016/11/16 09:50:24]

Done.

 };
 
 }  // namespace voe