Compensate for the compression gain in the IntelligibilityEnhancer

webrtc/modules/audio_processing/intelligibility/intelligibility_enhancer.cc

Index: webrtc/modules/audio_processing/intelligibility/intelligibility_enhancer.cc
diff --git a/webrtc/modules/audio_processing/intelligibility/intelligibility_enhancer.cc b/webrtc/modules/audio_processing/intelligibility/intelligibility_enhancer.cc
index 33de5c1f954a99d0753d1f825b2e2cc91b72b961..c4c450f7768a86752c4d9a71e9ddddc5c0ae88bc 100644
--- a/webrtc/modules/audio_processing/intelligibility/intelligibility_enhancer.cc
+++ b/webrtc/modules/audio_processing/intelligibility/intelligibility_enhancer.cc
@@ -109,8 +109,12 @@ IntelligibilityEnhancer::IntelligibilityEnhancer(int sample_rate_hz,
 }
 
 void IntelligibilityEnhancer::SetCaptureNoiseEstimate(
-    std::vector<float> noise) {
+    std::vector<float> noise, int gain_db) {
   RTC_DCHECK_EQ(noise.size(), num_noise_bins_);
+  float gain = std::pow(10.f, gain_db / 20.f);

[turaj, 2016/04/25 13:51:13]

suggestion: const float

[aluebs-webrtc, 2016/04/27 22:52:58]

Totally!

+  for (size_t i = 0; i < noise.size(); ++i) {

[peah-webrtc, 2016/04/25 07:23:20]

Suggestion: You could use a foreach loop here.

[aluebs-webrtc, 2016/04/27 22:52:58]

Done.

+    noise[i] *= gain;
+  }
   // Disregarding return value since buffer overflow is acceptable, because it
   // is not critical to get each noise estimate.
   if (noise_estimation_queue_.Insert(&noise)) {