Fix normalization of noise estimate in NoiseSuppressor

webrtc/modules/audio_processing/ns/noise_suppression_x.c

Index: webrtc/modules/audio_processing/ns/noise_suppression_x.c
diff --git a/webrtc/modules/audio_processing/ns/noise_suppression_x.c b/webrtc/modules/audio_processing/ns/noise_suppression_x.c
index efe8a5bf2b5d2134172925cc6cae93a8ff6f8546..011b7d12bc5ad72610e2e9933fa193ba1efc5773 100644
--- a/webrtc/modules/audio_processing/ns/noise_suppression_x.c
+++ b/webrtc/modules/audio_processing/ns/noise_suppression_x.c
@@ -45,11 +45,14 @@ void WebRtcNsx_Process(NsxHandle* nsxInst,
                         num_bands, outFrame);
 }
 
-const uint32_t* WebRtcNsx_noise_estimate(const NsxHandle* nsxInst) {
+const uint32_t* WebRtcNsx_noise_estimate(const NsxHandle* nsxInst,
+                                         int* domain) {
+  *domain = 11;
   const NoiseSuppressionFixedC* self = (const NoiseSuppressionFixedC*)nsxInst;
   if (nsxInst == NULL || self->initFlag == 0) {
     return NULL;
   }
+  *domain += self->prevQNoise;

[peah-webrtc, 2016/03/31 20:50:57]

What is the Q value of prevNoiseU32? From the name I thought it would be
self->prevQNoise but the value in domain is self->prevQNoise+11

[aluebs-webrtc, 2016/04/01 01:52:42]

Yes, I agree that it is confusing, but it is in fact self->prevQNoise+11, which
can be seen in the documentation of nsx_core.

   return self->prevNoiseU32;
 }