Update RateStatistics to handle too-little-data case.

webrtc/modules/remote_bitrate_estimator/include/bwe_defines.h

Index: webrtc/modules/remote_bitrate_estimator/include/bwe_defines.h
diff --git a/webrtc/modules/remote_bitrate_estimator/include/bwe_defines.h b/webrtc/modules/remote_bitrate_estimator/include/bwe_defines.h
index 3fb7e29e5b2fac5a1232c4bb78fd0cec7c4517f6..9aa82cff976ad1070d5ad3d178c6a9ea7bed59e6 100644
--- a/webrtc/modules/remote_bitrate_estimator/include/bwe_defines.h
+++ b/webrtc/modules/remote_bitrate_estimator/include/bwe_defines.h
@@ -11,6 +11,7 @@
 #ifndef WEBRTC_MODULES_REMOTE_BITRATE_ESTIMATOR_INCLUDE_BWE_DEFINES_H_
 #define WEBRTC_MODULES_REMOTE_BITRATE_ESTIMATOR_INCLUDE_BWE_DEFINES_H_
 
+#include "webrtc/base/optional.h"
 #include "webrtc/typedefs.h"
 
 #define BWE_MAX(a, b) ((a) > (b) ? (a) : (b))
@@ -32,14 +33,14 @@ enum RateControlRegion { kRcNearMax, kRcAboveMax, kRcMaxUnknown };
 
 struct RateControlInput {
   RateControlInput(BandwidthUsage bw_state,
-                   uint32_t incoming_bitrate,
+                   const rtc::Optional<uint32_t>& incoming_bitrate,
                    double noise_var)
       : bw_state(bw_state),
         incoming_bitrate(incoming_bitrate),
         noise_var(noise_var) {}
 
   BandwidthUsage bw_state;
-  uint32_t incoming_bitrate;
+  rtc::Optional<uint32_t> incoming_bitrate;

[stefan-webrtc, 2016/06/02 07:16:41]

Seems like a nice improvement!

[sprang_webrtc, 2016/06/02 08:09:32]

Thanks! I think there are bunch of hidden places where optionals make sense..

   double noise_var;
 };
 }  // namespace webrtc