Add JavaScript (node-addon) API for speech enhancement GTCRN models (#1996)

scripts/node-addon-api/lib/non-streaming-speech-denoiser.js

@@ -0,0 +1,28 @@
+const addon = require('./addon.js');
+
+class OfflineSpeechDenoiser {
+  constructor(config) {
+    this.handle = addon.createOfflineSpeechDenoiser(config);
+    this.config = config;
+
+    this.sampleRate =
+        addon.offlineSpeechDenoiserGetSampleRateWrapper(this.handle);
+  }
+
+  /*
+    obj is
+    {samples: samples, sampleRate: sampleRate, enableExternalBuffer: true}
+
+    samples is a float32 array containing samples in the range [-1, 1]
+    sampleRate is a number
+
+   return an object {samples: Float32Array, sampleRate: <a number>}
+   */
+  run(obj) {
+    return addon.offlineSpeechDenoiserRunWrapper(this.handle, obj);
+  }
+}
+
+module.exports = {
+  OfflineSpeechDenoiser,
+}