Compensate for the IntelligibilityEnhancer processing delay in high bands

webrtc/common_audio/blocker.cc

Index: webrtc/common_audio/blocker.cc
diff --git a/webrtc/common_audio/blocker.cc b/webrtc/common_audio/blocker.cc
index 86dfdf36445ec691e6e9d6ee4d3533d60b8e4dfa..2d84954c24be90ff4e7140b90bf1ee6effb8cbef 100644
--- a/webrtc/common_audio/blocker.cc
+++ b/webrtc/common_audio/blocker.cc
@@ -211,12 +211,10 @@ void Blocker::ProcessChunk(const float* const* input,
   }
 
   // Copy output buffer to output
-  CopyFrames(output_buffer_.channels(),
-             0,
-             chunk_size_,
-             num_output_channels_,
-             output,
-             0);
+  if (output != nullptr) {

[peah-webrtc, 2016/09/15 15:06:20]

Is this change still needed in this CL?

[aluebs-webrtc, 2016/09/15 23:45:25]

No, I just decided to leave it since I thought it was a nice validation to have.
Plus the possibility to be able to have blocker to be used only for analysis.
But you are right, this change is now unrelated and should not be on this CL, so
I removed it.

+    CopyFrames(output_buffer_.channels(), 0, chunk_size_, num_output_channels_,
+               output, 0);
+  }
 
   // Copy output buffer [chunk_size_, chunk_size_ + initial_delay]
   // to output buffer [0, initial_delay], zero the rest.