Add microphone example for .Net (#248)

k2-fsa · Aug 4, 2023 · 77c34f3 · 77c34f3
1 parent 39d6b91
commit 77c34f3
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Showing 6 changed files with 435 additions and 188 deletions.
diff --git a/dotnet-examples/decode-file/DecodeFile.cs b/dotnet-examples/decode-file/DecodeFile.cs
@@ -1,9 +1,11 @@
 // Copyright (c)  2023  Xiaomi Corporation (authors: Fangjun Kuang)
 using System;
 
-class DecodeFile {
-  public static void Main(String[] args) {
-    String usage = @"
+class DecodeFile
+{
+    public static void Main(String[] args)
+    {
+        String usage = @"
       ./DecodeFile.exe \
          /path/to/tokens.txt \
          /path/to/encoder.ncnn.param \
@@ -14,66 +16,71 @@ public static void Main(String[] args) {
          /path/to/joiner.ncnn.bin \
          /path/to/foo.wav [<num_threads> [decode_method]]
 
-      num_threads: Default to 2
+      num_threads: Default to 1
       decoding_method: greedy_search (default), or modified_beam_search
 
       Please refer to
       https://k2-fsa.github.io/sherpa/ncnn/pretrained_models/index.html
       for a list of pre-trained models to download.
       ";
-    if (args.Length < 8 || args.Length > 10) {
-      Console.WriteLine(usage);
-      return;
+        if (args.Length < 8 || args.Length > 10)
+        {
+            Console.WriteLine(usage);
+            return;
+        }
+
+        String waveFilename = args[7];
+        SherpaNcnn.WaveReader waveReader = new SherpaNcnn.WaveReader(waveFilename);
+
+        SherpaNcnn.OnlineRecognizerConfig config = new SherpaNcnn.OnlineRecognizerConfig();
+        config.FeatConfig.SampleRate = 16000;
+        config.FeatConfig.FeatureDim = 80;
+        config.ModelConfig.Tokens = args[0];
+        config.ModelConfig.EncoderParam = args[1];
+        config.ModelConfig.EncoderBin = args[2];
+
+        config.ModelConfig.DecoderParam = args[3];
+        config.ModelConfig.DecoderBin = args[4];
+
+        config.ModelConfig.JoinerParam = args[5];
+        config.ModelConfig.JoinerBin = args[6];
+
+        config.ModelConfig.UseVulkanCompute = 0;
+        config.ModelConfig.NumThreads = 1;
+        if (args.Length >= 9)
+        {
+            config.ModelConfig.NumThreads = Int32.Parse(args[8]);
+            if (config.ModelConfig.NumThreads > 1)
+            {
+                Console.WriteLine($"Use num_threads: {config.ModelConfig.NumThreads}");
+            }
+        }
+
+        config.DecoderConfig.DecodingMethod = "greedy_search";
+        if (args.Length == 10 && args[9] != "greedy_search")
+        {
+            Console.WriteLine($"Use decoding_method {args[9]}");
+            config.DecoderConfig.DecodingMethod = args[9];
+        }
+
+        config.DecoderConfig.NumActivePaths = 4;
+
+        SherpaNcnn.OnlineRecognizer recognizer = new SherpaNcnn.OnlineRecognizer(config);
+
+        SherpaNcnn.OnlineStream stream = recognizer.CreateStream();
+        stream.AcceptWaveform(waveReader.SampleRate, waveReader.Samples);
+
+        float[] tailPadding = new float[(int)(waveReader.SampleRate * 0.3)];
+        stream.AcceptWaveform(waveReader.SampleRate, tailPadding);
+
+        stream.InputFinished();
+
+        while (recognizer.IsReady(stream))
+        {
+            recognizer.Decode(stream);
+        }
+
+        SherpaNcnn.OnlineRecognizerResult result = recognizer.GetResult(stream);
+        Console.WriteLine(result.Text);
     }
-
-    String waveFilename = args[7];
-    SherpaNcnn.WaveReader waveReader = new SherpaNcnn.WaveReader(waveFilename);
-
-    SherpaNcnn.OnlineRecognizerConfig config = new SherpaNcnn.OnlineRecognizerConfig();
-    config.FeatConfig.SampleRate =  16000;
-    config.FeatConfig.FeatureDim =  80;
-    config.ModelConfig.Tokens = args[0];
-    config.ModelConfig.EncoderParam = args[1];
-    config.ModelConfig.EncoderBin = args[2];
-
-    config.ModelConfig.DecoderParam = args[3];
-    config.ModelConfig.DecoderBin = args[4];
-
-    config.ModelConfig.JoinerParam = args[5];
-    config.ModelConfig.JoinerBin = args[6];
-
-    config.ModelConfig.UseVulkanCompute = 0;
-    config.ModelConfig.NumThreads = 1;
-    if (args.Length >= 9) {
-      config.ModelConfig.NumThreads = Int32.Parse(args[8]);
-      if (config.ModelConfig.NumThreads > 1) {
-        Console.WriteLine($"Use num_threads: {config.ModelConfig.NumThreads}");
-      }
-    }
-
-    config.DecoderConfig.DecodingMethod = "greedy_search";
-    if (args.Length == 10 && args[9] != "greedy_search") {
-      Console.WriteLine($"Use decoding_method {args[9]}");
-      config.DecoderConfig.DecodingMethod = args[9];
-    }
-
-    config.DecoderConfig.NumActivePaths = 4;
-
-    SherpaNcnn.OnlineRecognizer recognizer = new SherpaNcnn.OnlineRecognizer(config);
-
-    SherpaNcnn.OnlineStream stream =  recognizer.CreateStream();
-    stream.AcceptWaveform(waveReader.SampleRate, waveReader.Samples);
-
-    float[] tailPadding = new float[(int)(waveReader.SampleRate * 0.3)];
-    stream.AcceptWaveform(waveReader.SampleRate, tailPadding);
-
-    stream.InputFinished();
-
-    while(recognizer.IsReady(stream)) {
-      recognizer.Decode(stream);
-    }
-
-    SherpaNcnn.OnlineRecognizerResult result = recognizer.GetResult(stream);
-    Console.WriteLine(result.Text);
-  }
 }