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

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 02b44cc09108ee876bc6799d945b6a9c1579ba0f..7a5fc428c16cd34a8beef4967558b3b99da69838 100644
--- a/webrtc/modules/audio_processing/ns/noise_suppression_x.h
+++ b/webrtc/modules/audio_processing/ns/noise_suppression_x.h
@@ -11,6 +11,8 @@
 #ifndef WEBRTC_MODULES_AUDIO_PROCESSING_NS_NOISE_SUPPRESSION_X_H_
 #define WEBRTC_MODULES_AUDIO_PROCESSING_NS_NOISE_SUPPRESSION_X_H_
 
+#include <stddef.h>
+
 #include "webrtc/typedefs.h"
 
 typedef struct NsxHandleT NsxHandle;
@@ -81,6 +83,25 @@ void WebRtcNsx_Process(NsxHandle* nsxInst,
                        int num_bands,
                        short* const* outFrame);
 
+/* Returns a pointer to the noise estimate per frequency bin. The number of
+ * frequency bins can be provided using WebRtcNsx_num_freq().
+ *
+ * Input
+ *      - nsxInst       : NSx instance. Needs to be initiated before call.
+ *
+ * Return value         : Pointer to the noise estimate per frequency bin.
+ *                        Returns NULL if the input is a NULL pointer or an
+ *                        uninitialized instance.
+ */
+const uint32_t* WebRtcNsx_noise_estimate(const NsxHandle* nsxInst);
+
+/* Returns the number of frequency bins, which is the length of the noise
+ * estimate for example.
+ *
+ * Return value         : Number of frequency bins.
+ */
+size_t WebRtcNsx_num_freq();
+
 #ifdef __cplusplus
 }
 #endif