Add JavaScript API for Moonshine models (#1480)

nodejs-addon-examples/test_asr_non_streaming_moonshine.js

@@ -0,0 +1,50 @@
+// Copyright (c)  2024  Xiaomi Corporation
+const sherpa_onnx = require('sherpa-onnx-node');
+
+// Please download test files from
+// https://github.com/k2-fsa/sherpa-onnx/releases/tag/asr-models
+const config = {
+  'featConfig': {
+    'sampleRate': 16000,
+    'featureDim': 80,
+  },
+  'modelConfig': {
+    'moonshine': {
+      'preprocessor': './sherpa-onnx-moonshine-tiny-en-int8/preprocess.onnx',
+      'encoder': './sherpa-onnx-moonshine-tiny-en-int8/encode.int8.onnx',
+      'uncachedDecoder':
+          './sherpa-onnx-moonshine-tiny-en-int8/uncached_decode.int8.onnx',
+      'cachedDecoder':
+          './sherpa-onnx-moonshine-tiny-en-int8/cached_decode.int8.onnx',
+    },
+    'tokens': './sherpa-onnx-moonshine-tiny-en-int8/tokens.txt',
+    'numThreads': 2,
+    'provider': 'cpu',
+    'debug': 1,
+  }
+};
+
+const waveFilename = './sherpa-onnx-moonshine-tiny-en-int8/test_wavs/0.wav';
+
+const recognizer = new sherpa_onnx.OfflineRecognizer(config);
+console.log('Started')
+let start = Date.now();
+const stream = recognizer.createStream();
+const wave = sherpa_onnx.readWave(waveFilename);
+stream.acceptWaveform({sampleRate: wave.sampleRate, samples: wave.samples});
+
+recognizer.decode(stream);
+result = recognizer.getResult(stream)
+let stop = Date.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 = ${elapsed_seconds.toFixed(3)}/${duration.toFixed(3)} =`,
+    real_time_factor.toFixed(3))
+console.log(waveFilename)
+console.log('result\n', result)