Integrate Intelligibility with APM

webrtc/modules/audio_processing/intelligibility/intelligibility_utils.cc

Index: webrtc/modules/audio_processing/intelligibility/intelligibility_utils.cc
diff --git a/webrtc/modules/audio_processing/intelligibility/intelligibility_utils.cc b/webrtc/modules/audio_processing/intelligibility/intelligibility_utils.cc
index d67d200689f1613391c18c138b55f504a18ffde4..2d7309ee12aafbd9048909a1ed789e3496789b79 100644
--- a/webrtc/modules/audio_processing/intelligibility/intelligibility_utils.cc
+++ b/webrtc/modules/audio_processing/intelligibility/intelligibility_utils.cc
@@ -329,6 +329,22 @@ void GainApplier::Apply(const complex<float>* in_block,
   }
 }
 
+void GainApplier::Clear() {
+  for (int i = 0; i < freqs_; i++) {

[aluebs-webrtc, 2015/07/20 19:33:43]

++i
Also, maybe use num_freqs_? It is clearer.

[ekm, 2015/07/21 01:02:44]

Done.

+    target_[i] = 1.0f;

[aluebs-webrtc, 2015/07/20 19:33:43]

1.f

[ekm, 2015/07/21 01:02:44]

Done.

+  }
+}
+
+// TODO(ekmeyerson): Can reduce from O(|freqs_|) to O(1) if necessary.
+bool GainApplier::IsIdentity() {
+  for (int i = 0; i < freqs_; i++) {

[aluebs-webrtc, 2015/07/20 19:33:43]

++i

[ekm, 2015/07/21 01:02:44]

Done.

+    if (current_[i] != 1.0f || target_[i] != 1.0f) {

[aluebs-webrtc, 2015/07/20 19:33:43]

1.f both times.

[ekm, 2015/07/21 01:02:44]

Done.

+      return false;
+    }
+  }
+  return true;
+}
+
 }  // namespace intelligibility
 
 }  // namespace webrtc