Adding fraction of filter divergence in AEC metrics.

webrtc/modules/audio_processing/aec/aec_core_internal.h

 /*
  *  Copyright (c) 2013 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 30 matching lines @@
 static const float kExtendedErrorThreshold = 1.0e-6f;
 
 typedef struct PowerLevel {
   PowerLevel();
 
   BlockMeanCalculator framelevel;
   BlockMeanCalculator averagelevel;
   float minlevel;
 } PowerLevel;
 
+class DivergentFilterFraction {
+ public:
+  DivergentFilterFraction();
+
+  // Reset.
+  void Reset();
+
+  void AddObservation(const PowerLevel& nearlevel,
+                      const PowerLevel& linoutlevel,
+                      const PowerLevel& nlpoutlevel);
+
+  // Return the latest fraction.
+  float GetLatestFraction() const;
+
+ private:
+  // Clear all values added.
+  void Clear();
+
+  size_t count_;
+  size_t occurrence_;
+  float fraction_;
+
+  RTC_DISALLOW_COPY_AND_ASSIGN(DivergentFilterFraction);
+};
+
 struct AecCore {
   AecCore();
 
   int farBufWritePos, farBufReadPos;
 
   int knownDelay;
   int inSamples, outSamples;
   int delayEstCtr;
 
   RingBuffer* nearFrBuf;
@@ skipping 53 matching lines @@
   PowerLevel nearlevel;
   PowerLevel linoutlevel;
   PowerLevel nlpoutlevel;
 
   int metricsMode;
   int stateCounter;
   Stats erl;
   Stats erle;
   Stats aNlp;
   Stats rerl;
+  DivergentFilterFraction divergent_filter_fraction;
 
   // Quantities to control H band scaling for SWB input
   int freq_avg_ic;       // initial bin for averaging nlp gain
   int flag_Hband_cn;     // for comfort noise
   float cn_scale_Hband;  // scale for comfort noise in H band
 
   int delay_metrics_delivered;
   int delay_histogram[kHistorySizeBlocks];
   int num_delay_values;
   int delay_median;
@@ skipping 92 matching lines @@
 typedef void (*WebRtcAecStoreAsComplex)(const float* data,
                                         float data_complex[2][PART_LEN1]);
 extern WebRtcAecStoreAsComplex WebRtcAec_StoreAsComplex;
 
 typedef void (*WebRtcAecWindowData)(float* x_windowed, const float* x);
 extern WebRtcAecWindowData WebRtcAec_WindowData;
 
 }  // namespace webrtc
 
 #endif  // WEBRTC_MODULES_AUDIO_PROCESSING_AEC_AEC_CORE_INTERNAL_H_