Surface the noise estimate of the NS to be used by other components

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 0a5ba133002b6d2e5cc8e5d824cf68106ed6de9e..efe8a5bf2b5d2134172925cc6cae93a8ff6f8546 100644
--- a/webrtc/modules/audio_processing/ns/noise_suppression_x.c
+++ b/webrtc/modules/audio_processing/ns/noise_suppression_x.c
@@ -44,3 +44,15 @@ void WebRtcNsx_Process(NsxHandle* nsxInst,
   WebRtcNsx_ProcessCore((NoiseSuppressionFixedC*)nsxInst, speechFrame,
                         num_bands, outFrame);
 }
+
+const uint32_t* WebRtcNsx_noise_estimate(const NsxHandle* nsxInst) {
+  const NoiseSuppressionFixedC* self = (const NoiseSuppressionFixedC*)nsxInst;
+  if (nsxInst == NULL || self->initFlag == 0) {
+    return NULL;
+  }
+  return self->prevNoiseU32;
+}
+
+size_t WebRtcNsx_num_freq() {
+  return HALF_ANAL_BLOCKL;
+}