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

webrtc/modules/audio_processing/ns/noise_suppression_x.c

 /*
  *  Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
@@ skipping 26 matching lines @@
   return WebRtcNsx_set_policy_core((NoiseSuppressionFixedC*)nsxInst, mode);
 }
 
 void WebRtcNsx_Process(NsxHandle* nsxInst,
                       const short* const* speechFrame,
                       int num_bands,
                       short* const* outFrame) {
   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;
+}