Program.cs
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// Copyright (c) 2024 Xiaomi Corporation
//
// This file shows how to do keyword spotting with sherpa-onnx.
//
// 1. Download a model from
// https://github.com/k2-fsa/sherpa-onnx/releases/tag/kws-models
//
// wget https://github.com/k2-fsa/sherpa-onnx/releases/download/kws-models/sherpa-onnx-kws-zipformer-wenetspeech-3.3M-2024-01-01.tar.bz2
// tar xvf sherpa-onnx-kws-zipformer-wenetspeech-3.3M-2024-01-01.tar.bz2
//
// 2. Now run it
//
// dotnet run
using SherpaOnnx;
using System.Collections.Generic;
using System;
class KeywordSpotterDemo
{
static void Main(string[] args)
{
var config = new KeywordSpotterConfig();
config.FeatConfig.SampleRate = 16000;
config.FeatConfig.FeatureDim = 80;
config.ModelConfig.Transducer.Encoder = "./sherpa-onnx-kws-zipformer-wenetspeech-3.3M-2024-01-01/encoder-epoch-12-avg-2-chunk-16-left-64.onnx";
config.ModelConfig.Transducer.Decoder = "./sherpa-onnx-kws-zipformer-wenetspeech-3.3M-2024-01-01/decoder-epoch-12-avg-2-chunk-16-left-64.onnx";
config.ModelConfig.Transducer.Joiner = "./sherpa-onnx-kws-zipformer-wenetspeech-3.3M-2024-01-01/joiner-epoch-12-avg-2-chunk-16-left-64.onnx";
config.ModelConfig.Tokens = "./sherpa-onnx-kws-zipformer-wenetspeech-3.3M-2024-01-01/tokens.txt";
config.ModelConfig.Provider = "cpu";
config.ModelConfig.NumThreads = 1;
config.ModelConfig.Debug = 1;
config.KeywordsFile = "./sherpa-onnx-kws-zipformer-wenetspeech-3.3M-2024-01-01/test_wavs/test_keywords.txt";
var kws = new KeywordSpotter(config);
var filename = "./sherpa-onnx-kws-zipformer-wenetspeech-3.3M-2024-01-01/test_wavs/3.wav";
WaveReader waveReader = new WaveReader(filename);
Console.WriteLine("----------Use pre-defined keywords----------");
OnlineStream s = kws.CreateStream();
s.AcceptWaveform(waveReader.SampleRate, waveReader.Samples);
float[] tailPadding = new float[(int)(waveReader.SampleRate * 0.3)];
s.AcceptWaveform(waveReader.SampleRate, tailPadding);
s.InputFinished();
while (kws.IsReady(s))
{
kws.Decode(s);
var result = kws.GetResult(s);
if (result.Keyword != "")
{
Console.WriteLine("Detected: {0}", result.Keyword);
}
}
Console.WriteLine("----------Use pre-defined keywords + add a new keyword----------");
s = kws.CreateStream("y ǎn y uán @演员");
s.AcceptWaveform(waveReader.SampleRate, waveReader.Samples);
s.AcceptWaveform(waveReader.SampleRate, tailPadding);
s.InputFinished();
while (kws.IsReady(s))
{
kws.Decode(s);
var result = kws.GetResult(s);
if (result.Keyword != "")
{
Console.WriteLine("Detected: {0}", result.Keyword);
}
}
Console.WriteLine("----------Use pre-defined keywords + add 2 new keywords----------");
// Note keywords are separated by /
s = kws.CreateStream("y ǎn y uán @演员/zh ī m íng @知名");
s.AcceptWaveform(waveReader.SampleRate, waveReader.Samples);
s.AcceptWaveform(waveReader.SampleRate, tailPadding);
s.InputFinished();
while (kws.IsReady(s))
{
kws.Decode(s);
var result = kws.GetResult(s);
if (result.Keyword != "")
{
Console.WriteLine("Detected: {0}", result.Keyword);
}
}
}
}