Split online.cs and offline.csFile (#941)

Co-authored-by: 东风破 <birdfishs@163.com>

scripts/dotnet/SpeakerEmbeddingExtractor.cs

@@ -0,0 +1,96 @@
+/// Copyright (c)  2024.5 by 东风破
+
+using System.Linq;
+using System.Collections.Generic;
+using System.Runtime.InteropServices;
+using System.Text;
+using System;
+
+namespace SherpaOnnx
+{
+    public class SpeakerEmbeddingExtractor : IDisposable
+    {
+        public SpeakerEmbeddingExtractor(SpeakerEmbeddingExtractorConfig config)
+        {
+            IntPtr h = SherpaOnnxCreateSpeakerEmbeddingExtractor(ref config);
+            _handle = new HandleRef(this, h);
+        }
+
+        public OnlineStream CreateStream()
+        {
+            IntPtr p = SherpaOnnxSpeakerEmbeddingExtractorCreateStream(_handle.Handle);
+            return new OnlineStream(p);
+        }
+
+        public bool IsReady(OnlineStream stream)
+        {
+            return SherpaOnnxSpeakerEmbeddingExtractorIsReady(_handle.Handle, stream.Handle) != 0;
+        }
+
+        public float[] Compute(OnlineStream stream)
+        {
+            IntPtr p = SherpaOnnxSpeakerEmbeddingExtractorComputeEmbedding(_handle.Handle, stream.Handle);
+
+            int dim = Dim;
+            float[] ans = new float[dim];
+            Marshal.Copy(p, ans, 0, dim);
+
+            SherpaOnnxSpeakerEmbeddingExtractorDestroyEmbedding(p);
+
+            return ans;
+        }
+
+        public int Dim
+        {
+            get
+            {
+                return SherpaOnnxSpeakerEmbeddingExtractorDim(_handle.Handle);
+            }
+        }
+
+        public void Dispose()
+        {
+            Cleanup();
+            // Prevent the object from being placed on the
+            // finalization queue
+            System.GC.SuppressFinalize(this);
+        }
+
+        ~SpeakerEmbeddingExtractor()
+        {
+            Cleanup();
+        }
+
+        private void Cleanup()
+        {
+            SherpaOnnxDestroySpeakerEmbeddingExtractor(_handle.Handle);
+
+            // Don't permit the handle to be used again.
+            _handle = new HandleRef(this, IntPtr.Zero);
+        }
+
+        private HandleRef _handle;
+
+        [DllImport(Dll.Filename)]
+        private static extern IntPtr SherpaOnnxCreateSpeakerEmbeddingExtractor(ref SpeakerEmbeddingExtractorConfig config);
+
+        [DllImport(Dll.Filename)]
+        private static extern void SherpaOnnxDestroySpeakerEmbeddingExtractor(IntPtr handle);
+
+        [DllImport(Dll.Filename)]
+        private static extern int SherpaOnnxSpeakerEmbeddingExtractorDim(IntPtr handle);
+
+        [DllImport(Dll.Filename)]
+        private static extern IntPtr SherpaOnnxSpeakerEmbeddingExtractorCreateStream(IntPtr handle);
+
+        [DllImport(Dll.Filename)]
+        private static extern int SherpaOnnxSpeakerEmbeddingExtractorIsReady(IntPtr handle, IntPtr stream);
+
+        [DllImport(Dll.Filename)]
+        private static extern IntPtr SherpaOnnxSpeakerEmbeddingExtractorComputeEmbedding(IntPtr handle, IntPtr stream);
+
+        [DllImport(Dll.Filename)]
+        private static extern void SherpaOnnxSpeakerEmbeddingExtractorDestroyEmbedding(IntPtr p);
+    }
+
+}