Begin to add node-addon-api for sherpa-onnx (#826)

scripts/node-addon-api/test/test_asr_streaming_transducer.js

@@ -0,0 +1,53 @@
+// Copyright (c)  2024  Xiaomi Corporation
+const sherpa_onnx = require('../lib/sherpa-onnx.js');
+
+const config = {
+  'featConfig': {
+    'sampleRate': 16000,
+    'featureDim': 80,
+  },
+  'modelConfig': {
+    'transducer': {
+      'encoder':
+          './sherpa-onnx-streaming-zipformer-bilingual-zh-en-2023-02-20/encoder-epoch-99-avg-1.onnx',
+      'decoder':
+          './sherpa-onnx-streaming-zipformer-bilingual-zh-en-2023-02-20/decoder-epoch-99-avg-1.onnx',
+      'joiner':
+          './sherpa-onnx-streaming-zipformer-bilingual-zh-en-2023-02-20/joiner-epoch-99-avg-1.onnx',
+    },
+    'tokens':
+        './sherpa-onnx-streaming-zipformer-bilingual-zh-en-2023-02-20/tokens.txt',
+    'numThreads': 2,
+    'provider': 'cpu',
+    'debug': 1,
+    'modelType': 'zipformer',
+  }
+};
+
+const waveFilename =
+    './sherpa-onnx-streaming-zipformer-bilingual-zh-en-2023-02-20/test_wavs/0.wav';
+
+const recognizer = new sherpa_onnx.OnlineRecognizer(config);
+console.log('Started')
+let start = performance.now();
+const stream = recognizer.createStream();
+const wave = sherpa_onnx.readWave(waveFilename);
+stream.acceptWaveform(wave.samples, wave.sampleRate);
+
+const tailPadding = new Float32Array(wave.sampleRate * 0.4);
+stream.acceptWaveform(tailPadding, wave.sampleRate);
+
+while (recognizer.isReady(stream)) {
+  recognizer.decode(stream);
+}
+result = recognizer.getResult(stream)
+let stop = performance.now();
+console.log('Done')
+
+const elapsed_seconds = (stop - start) / 1000;
+const duration = wave.samples.length / wave.sampleRate;
+const real_time_factor = elapsed_seconds / duration;
+console.log('Wave duration', duration.toFixed(3), 'secodns')
+console.log('Elapsed', elapsed_seconds.toFixed(3), 'secodns')
+console.log('RTF', real_time_factor.toFixed(3))
+console.log('result', result.text)

scripts/node-addon-api/test/test_binding.js

@@ -0,0 +1,4 @@
+const sherpa_onnx = require('../lib/sherpa-onnx.js');
+console.log(sherpa_onnx)
+
+console.log('Tests passed- everything looks OK!');