Add Java API for speaker identification (#822)

sherpa-onnx/java-api/src/com/k2fsa/sherpa/onnx/SpeakerEmbeddingManager.java

@@ -0,0 +1,80 @@
+// Copyright 2024 Xiaomi Corporation
+
+package com.k2fsa.sherpa.onnx;
+
+public class SpeakerEmbeddingManager {
+    static {
+        System.loadLibrary("sherpa-onnx-jni");
+    }
+
+    private long ptr = 0;
+
+    public SpeakerEmbeddingManager(int dim) {
+        ptr = create(dim);
+    }
+
+    @Override
+    protected void finalize() throws Throwable {
+        release();
+    }
+
+    public void release() {
+        if (this.ptr == 0) {
+            return;
+        }
+        delete(this.ptr);
+        this.ptr = 0;
+    }
+
+    public boolean add(String name, float[] embedding) {
+        return add(ptr, name, embedding);
+    }
+
+    public boolean add(String name, float[][] embedding) {
+        return addList(ptr, name, embedding);
+    }
+
+    public boolean remove(String name) {
+        return remove(ptr, name);
+    }
+
+    public String search(float[] embedding, float threshold) {
+        return search(ptr, embedding, threshold);
+    }
+
+    public boolean verify(String name, float[] embedding, float threshold) {
+        return verify(ptr, name, embedding, threshold);
+    }
+
+    public boolean contains(String name) {
+        return contains(ptr, name);
+    }
+
+    public int getNumSpeakers() {
+        return numSpeakers(ptr);
+    }
+
+    public String[] getAllSpeakerNames() {
+        return allSpeakerNames(ptr);
+    }
+
+    private native long create(int dim);
+
+    private native void delete(long ptr);
+
+    private native boolean add(long ptr, String name, float[] embedding);
+
+    private native boolean addList(long ptr, String name, float[][] embedding);
+
+    private native boolean remove(long ptr, String name);
+
+    private native String search(long ptr, float[] embedding, float threshold);
+
+    private native boolean verify(long ptr, String name, float[] embedding, float threshold);
+
+    private native boolean contains(long ptr, String name);
+
+    private native int numSpeakers(long ptr);
+
+    private native String[] allSpeakerNames(long ptr);
+}