Integrate Intelligibility with APM

webrtc/modules/audio_processing/intelligibility/intelligibility_utils.h

Index: webrtc/modules/audio_processing/intelligibility/intelligibility_utils.h
diff --git a/webrtc/modules/audio_processing/intelligibility/intelligibility_utils.h b/webrtc/modules/audio_processing/intelligibility/intelligibility_utils.h
index 9908ac0456f1974f263a42e33a5124f5a3f9c33a..fbef5241df054ffad16f092522bc7969d3e4f595 100644
--- a/webrtc/modules/audio_processing/intelligibility/intelligibility_utils.h
+++ b/webrtc/modules/audio_processing/intelligibility/intelligibility_utils.h
@@ -125,7 +125,7 @@ class VarianceArray {
   rtc::scoped_ptr<float[]> variance_;
   rtc::scoped_ptr<float[]> conj_sum_;
 
-  const int freqs_;
+  const int num_freqs_;
   const int window_size_;
   const float decay_;
   int history_cursor_;
@@ -147,11 +147,17 @@ class GainApplier {
   void Apply(const std::complex<float>* in_block,
              std::complex<float>* out_block);
 
+  // Resets all target gain factors to 1.
+  void Clear();
+
+  // Returns true if all current and target gain factors are 1.
+  bool IsIdentity();
+
   // Return the current target gain set. Modify this array to set the targets.
   float* target() const { return target_.get(); }
 
  private:
-  const int freqs_;
+  const int num_freqs_;
   const float change_limit_;
   rtc::scoped_ptr<float[]> target_;
   rtc::scoped_ptr<float[]> current_;