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

nodejs-addon-examples/README.md

@@ -43,6 +43,12 @@ export LD_LIBRARY_PATH=$PWD/node_modules/.pnpm/sherpa-onnx-node@<REPLACE-THIS-WI
 
 The following tables list the examples in this folder.
 
+## Speech enhancement/denoising
+
+|File| Description|
+|---|---|
+|[./test_offline_speech_enhancement_gtcrn.js](./test_offline_speech_enhancement_gtcrn.js)| It demonstrates how to use sherpa-onnx JavaScript API for speech enhancement.|
+
 ## Speaker diarization
 
 |File| Description|
@@ -159,6 +165,15 @@ curl -SL -O https://github.com/k2-fsa/sherpa-onnx/releases/download/speaker-segm
 node ./test_offline_speaker_diarization.js
 ```
 
+### Speech enhancement/denoising
+
+```bash
+wget https://github.com/k2-fsa/sherpa-onnx/releases/download/speech-enhancement-models/gtcrn_simple.onnx
+wget https://github.com/k2-fsa/sherpa-onnx/releases/download/speech-enhancement-models/inp_16k.wav
+
+node ./test_offline_speech_enhancement_gtcrn.js
+```
+
 ### Voice Activity detection (VAD)
 
 ```bash

nodejs-addon-examples/test_offline_speech_enhancement_gtcrn.js

@@ -0,0 +1,32 @@
+// Copyright (c)  2025  Xiaomi Corporation (authors: Fangjun Kuang)
+
+const sherpa_onnx = require('sherpa-onnx-node');
+
+function createOfflineSpeechDenoiser() {
+  // please download models from
+  // https://github.com/k2-fsa/sherpa-onnx/releases/tag/speech-enhancement-models
+  const config = {
+    model: {
+      gtcrn: {model: './gtcrn_simple.onnx'},
+      debug: true,
+      numThreads: 1,
+    },
+  };
+
+  return new sherpa_onnx.OfflineSpeechDenoiser(config);
+}
+
+const sd = createOfflineSpeechDenoiser();
+
+const waveFilename = './inp_16k.wav';
+const wave = sherpa_onnx.readWave(waveFilename);
+const denoised = sd.run({
+  samples: wave.samples,
+  sampleRate: wave.sampleRate,
+  enableExternalBuffer: true
+});
+sherpa_onnx.writeWave(
+    './enhanced-16k.wav',
+    {samples: denoised.samples, sampleRate: denoised.sampleRate});
+
+console.log(`Saved to ./enhanced-16k.wav`);