Fix C# API to support streaming Paraformer (#266)

dotnet-examples/online-decode-files/Program.cs

@@ -23,15 +23,21 @@ class OnlineDecodeFiles
     [Option(Required = false, Default = "cpu", HelpText = "Provider, e.g., cpu, coreml")]
     public string Provider { get; set; }
 
-    [Option(Required = true, HelpText = "Path to encoder.onnx")]
+    [Option(Required = false, HelpText = "Path to transducer encoder.onnx")]
     public string Encoder { get; set; }
 
-    [Option(Required = true, HelpText = "Path to decoder.onnx")]
+    [Option(Required = false, HelpText = "Path to transducer decoder.onnx")]
     public string Decoder { get; set; }
 
-    [Option(Required = true, HelpText = "Path to joiner.onnx")]
+    [Option(Required = false, HelpText = "Path to transducer joiner.onnx")]
     public string Joiner { get; set; }
 
+    [Option("paraformer-encoder", Required = false, HelpText = "Path to paraformer encoder.onnx")]
+    public string ParaformerEncoder { get; set; }
+
+    [Option("paraformer-decoder", Required = false, HelpText = "Path to paraformer decoder.onnx")]
+    public string ParaformerDecoder { get; set; }
+
     [Option("num-threads", Required = false, Default = 1, HelpText = "Number of threads for computation")]
     public int NumThreads { get; set; }
 
@@ -88,6 +94,8 @@ larger than this value. Used only when --enable-endpoint is true.")]
   private static void DisplayHelp<T>(ParserResult<T> result, IEnumerable<Error> errs)
   {
     string usage = @"
+(1) Streaming transducer models
+
 dotnet run \
   --tokens=./sherpa-onnx-streaming-zipformer-bilingual-zh-en-2023-02-20/tokens.txt \
   --encoder=./sherpa-onnx-streaming-zipformer-bilingual-zh-en-2023-02-20/encoder-epoch-99-avg-1.onnx \
@@ -99,8 +107,20 @@ dotnet run \
   --files ./sherpa-onnx-streaming-zipformer-bilingual-zh-en-2023-02-20/test_wavs/0.wav \
   ./sherpa-onnx-streaming-zipformer-bilingual-zh-en-2023-02-20/test_wavs/1.wav
 
+(2) Streaming Paraformer models
+dotnet run \
+  --tokens=./sherpa-onnx-streaming-paraformer-bilingual-zh-en/tokens.txt \
+  --paraformer-encoder=./sherpa-onnx-streaming-paraformer-bilingual-zh-en/encoder.int8.onnx \
+  --paraformer-decoder=./sherpa-onnx-streaming-paraformer-bilingual-zh-en/decoder.int8.onnx \
+  --num-threads=2 \
+  --decoding-method=greedy_search \
+  --debug=false \
+  --files ./sherpa-onnx-streaming-paraformer-bilingual-zh-en/test_wavs/0.wav \
+  ./sherpa-onnx-streaming-paraformer-bilingual-zh-en/test_wavs/1.wav
+
 Please refer to
 https://k2-fsa.github.io/sherpa/onnx/pretrained_models/online-transducer/index.html
+https://k2-fsa.github.io/sherpa/onnx/pretrained_models/online-paraformer/index.html
 to download pre-trained streaming models.
 ";
 
@@ -123,13 +143,17 @@ to download pre-trained streaming models.
     // You can change it if your model has a different feature dim.
     config.FeatConfig.FeatureDim = 80;
 
-    config.TransducerModelConfig.Encoder = options.Encoder;
-    config.TransducerModelConfig.Decoder = options.Decoder;
-    config.TransducerModelConfig.Joiner = options.Joiner;
-    config.TransducerModelConfig.Tokens = options.Tokens;
-    config.TransducerModelConfig.Provider = options.Provider;
-    config.TransducerModelConfig.NumThreads = options.NumThreads;
-    config.TransducerModelConfig.Debug = options.Debug ? 1 : 0;
+    config.ModelConfig.Transducer.Encoder = options.Encoder;
+    config.ModelConfig.Transducer.Decoder = options.Decoder;
+    config.ModelConfig.Transducer.Joiner = options.Joiner;
+
+    config.ModelConfig.Paraformer.Encoder = options.ParaformerEncoder;
+    config.ModelConfig.Paraformer.Decoder = options.ParaformerDecoder;
+
+    config.ModelConfig.Tokens = options.Tokens;
+    config.ModelConfig.Provider = options.Provider;
+    config.ModelConfig.NumThreads = options.NumThreads;
+    config.ModelConfig.Debug = options.Debug ? 1 : 0;
 
     config.DecodingMethod = options.DecodingMethod;
     config.MaxActivePaths = options.MaxActivePaths;