Fix normalization of noise estimate in NoiseSuppressor

webrtc/modules/audio_processing/ns/noise_suppression_x.h

Index: webrtc/modules/audio_processing/ns/noise_suppression_x.h
diff --git a/webrtc/modules/audio_processing/ns/noise_suppression_x.h b/webrtc/modules/audio_processing/ns/noise_suppression_x.h
index 7a5fc428c16cd34a8beef4967558b3b99da69838..06e494d57ab0fcb29637ca6ccdab6b5e0e4c57a7 100644
--- a/webrtc/modules/audio_processing/ns/noise_suppression_x.h
+++ b/webrtc/modules/audio_processing/ns/noise_suppression_x.h
@@ -93,7 +93,7 @@ void WebRtcNsx_Process(NsxHandle* nsxInst,
  *                        Returns NULL if the input is a NULL pointer or an
  *                        uninitialized instance.
  */
-const uint32_t* WebRtcNsx_noise_estimate(const NsxHandle* nsxInst);
+const uint32_t* WebRtcNsx_noise_estimate(NsxHandle* nsxInst);

[turaj, 2016/03/31 15:20:48]

If you decide to keep this as it is (not going with my suggestion to output
domain in this function) then please add a comment that the domain is adaptive
and can be retrieved by calling the following API.

[aluebs-webrtc, 2016/03/31 17:48:13]

I accepted your suggestion and also added the respective comment here.

 
 /* Returns the number of frequency bins, which is the length of the noise
  * estimate for example.
@@ -102,6 +102,13 @@ const uint32_t* WebRtcNsx_noise_estimate(const NsxHandle* nsxInst);
  */
 size_t WebRtcNsx_num_freq();
 
+/* Returns the domain of the noise estimate, which is the number of bits that it
+ * needs to be right-shifted to be normalized.
+ *
+ * Return value         : Domain of the noise estimate.
+ */
+int WebRtcNsx_noise_estimate_domain(NsxHandle* nsxInst);
+
 #ifdef __cplusplus
 }
 #endif