Fixing init time error in smoothing filter.

webrtc/common_audio/smoothing_filter.cc

Index: webrtc/common_audio/smoothing_filter.cc
diff --git a/webrtc/common_audio/smoothing_filter.cc b/webrtc/common_audio/smoothing_filter.cc
index d2dde9d8542751d644157bd34e4c671cee177cad..88f56ccf17e2bf9f8cd4df78687c6722980b2631 100644
--- a/webrtc/common_audio/smoothing_filter.cc
+++ b/webrtc/common_audio/smoothing_filter.cc
@@ -14,8 +14,8 @@
 
 namespace webrtc {
 
-SmoothingFilterImpl::SmoothingFilterImpl(int init_time_ms_, const Clock* clock)
-    : init_time_ms_(init_time_ms_),
+SmoothingFilterImpl::SmoothingFilterImpl(int init_time_ms, const Clock* clock)

[minyue-webrtc, 2016/12/21 14:10:17]

this was an old error, no actual problem, but bad style.

+    : init_time_ms_(init_time_ms),
       // Duing the initalization time, we use an increasing alpha. Specifically,
       //   alpha(n) = exp(pow(init_factor_, n)),
       // where |init_factor_| is chosen such that
@@ -26,6 +26,7 @@ SmoothingFilterImpl::SmoothingFilterImpl(int init_time_ms_, const Clock* clock)
       init_const_(1.0f / (init_time_ms_ -
                           pow(init_time_ms_, 1.0f - 1.0f / init_time_ms_))),
       clock_(clock) {
+  RTC_DCHECK_GT(init_time_ms_, 1);
   UpdateAlpha(init_time_ms_);
 }