Add UMA stats for AEC filter divergence metric.

content/renderer/media/media_stream_audio_processor_options.h

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CONTENT_RENDERER_MEDIA_MEDIA_STREAM_AUDIO_PROCESSOR_OPTIONS_H_
 #define CONTENT_RENDERER_MEDIA_MEDIA_STREAM_AUDIO_PROCESSOR_OPTIONS_H_
 
 #include <string>
 
 #include "base/files/file.h"
@@ skipping 86 matching lines @@
 };
 
 // A helper class to log echo information in general and Echo Cancellation
 // quality in particular.
 class CONTENT_EXPORT EchoInformation {
  public:
   EchoInformation();
   virtual ~EchoInformation();
 
   void UpdateAecDelayStats(webrtc::EchoCancellation* echo_cancellation);
+  void UpdateAecDivergentFilterStats(
+      webrtc::EchoCancellation* echo_cancellation);
+  void ReportAndResetAecDivergentFilterStats();
 
  private:
   // Counter to track 5 seconds of processed 10 ms chunks in order to query a
   // new metric from webrtc::EchoCancellation::GetEchoDelayMetrics().
-  int num_chunks_;
+  int chunks_for_delay_stats_;

[minyue, 2016/06/28 08:18:41]

maybe better to count in time, e.g.,

time_for_delay_stats_ms

if you still want to use a counter of chunks, maybe better to use type "size_t"

[Henrik Grunell, 2016/06/28 09:33:10]

Yes, that's better. Done.

   bool echo_frames_received_;
 
+  // Counter to track 1 second of processed 10 ms chunks in order to query a new
+  // divergent filter fraction metric from
+  // webrtc::EchoCancellation::GetMetrics().
+  int chunks_for_divergent_filter_stats_;

[minyue, 2016/06/28 08:18:41]

maybe better to count in time, e.g.,

time_for_divergent_filter_stats_ms

[Henrik Grunell, 2016/06/28 09:33:10]

Done.

+
+  // Total number of times we queried for the divergent filter fraction metric.
+  int num_divergent_filter_fraction_;
+
+  // Number of non-zero divergent filter fraction metrics.
+  int num_non_zero_divergent_filter_fraction_;
+
   DISALLOW_COPY_AND_ASSIGN(EchoInformation);
 };
 
 // Enables the echo cancellation in |audio_processing|.
 void EnableEchoCancellation(AudioProcessing* audio_processing);
 
 // Enables the noise suppression in |audio_processing|.
 void EnableNoiseSuppression(AudioProcessing* audio_processing,
                             webrtc::NoiseSuppression::Level ns_level);
 
@@ skipping 20 matching lines @@
 
 // Returns the array geometry from the media constraints if existing and
 // otherwise that provided by the input device.
 CONTENT_EXPORT std::vector<webrtc::Point> GetArrayGeometryPreferringConstraints(
     const MediaAudioConstraints& audio_constraints,
     const MediaStreamDevice::AudioDeviceParameters& input_params);
 
 }  // namespace content
 
 #endif  // CONTENT_RENDERER_MEDIA_MEDIA_STREAM_AUDIO_PROCESSOR_OPTIONS_H_