Add Java API for speaker identification (#822)

@@ -106,6 +106,15 @@ jobs:
             make -j4
             ls -lh lib
 
+      - name:  Run java test (speaker identification)
+        shell: bash
+        run: |
+          cd ./java-api-examples
+          ./run-speaker-identification.sh
+          # Delete model files to save space
+          rm -rf *.onnx
+          rm -rf sr-data
+
       - name:  Run java test (audio tagging)
         shell: bash
         run: |

@@ -50,3 +50,9 @@ The punctuation model supports both English and Chinese.
 ./run-audio-tagging-zipformer-from-file.sh
 ./run-audio-tagging-ced-from-file.sh
 ```
+
+## Speaker identification
+
+```bash
+./run-speaker-identification.sh
+```

+// Copyright 2024 Xiaomi Corporation
+
+// This file shows how to use a speaker embedding extractor model for speaker
+// identification.
+import com.k2fsa.sherpa.onnx.*;
+
+public class SpeakerIdentification {
+  public static float[] computeEmbedding(SpeakerEmbeddingExtractor extractor, String filename) {
+    WaveReader reader = new WaveReader(filename);
+
+    OnlineStream stream = extractor.createStream();
+    stream.acceptWaveform(reader.getSamples(), reader.getSampleRate());
+    stream.inputFinished();
+
+    float[] embedding = extractor.compute(stream);
+    stream.release();
+
+    return embedding;
+  }
+
+  public static void main(String[] args) {
+    // Please download the model from
+    // https://github.com/k2-fsa/sherpa-onnx/releases/tag/speaker-recongition-models
+    String model = "./3dspeaker_speech_eres2net_base_sv_zh-cn_3dspeaker_16k.onnx";
+    SpeakerEmbeddingExtractorConfig config =
+        SpeakerEmbeddingExtractorConfig.builder()
+            .setModel(model)
+            .setNumThreads(1)
+            .setDebug(true)
+            .build();
+    SpeakerEmbeddingExtractor extractor = new SpeakerEmbeddingExtractor(config);
+    SpeakerEmbeddingManager manager = new SpeakerEmbeddingManager(extractor.getDim());
+
+    String[] spk1Files =
+        new String[] {
+          "./sr-data/enroll/fangjun-sr-1.wav",
+          "./sr-data/enroll/fangjun-sr-2.wav",
+          "./sr-data/enroll/fangjun-sr-3.wav",
+        };
+
+    float[][] spk1Vec = new float[spk1Files.length][];
+
+    for (int i = 0; i < spk1Files.length; ++i) {
+      spk1Vec[i] = computeEmbedding(extractor, spk1Files[i]);
+    }
+
+    String[] spk2Files =
+        new String[] {
+          "./sr-data/enroll/leijun-sr-1.wav", "./sr-data/enroll/leijun-sr-2.wav",
+        };
+
+    float[][] spk2Vec = new float[spk2Files.length][];
+
+    for (int i = 0; i < spk2Files.length; ++i) {
+      spk2Vec[i] = computeEmbedding(extractor, spk2Files[i]);
+    }
+
+    if (!manager.add("fangjun", spk1Vec)) {
+      System.out.println("Failed to register fangjun");
+      return;
+    }
+
+    if (!manager.add("leijun", spk2Vec)) {
+      System.out.println("Failed to register leijun");
+      return;
+    }
+
+    if (manager.getNumSpeakers() != 2) {
+      System.out.println("There should be two speakers");
+      return;
+    }
+
+    if (!manager.contains("fangjun")) {
+      System.out.println("It should contain the speaker fangjun");
+      return;
+    }
+
+    if (!manager.contains("leijun")) {
+      System.out.println("It should contain the speaker leijun");
+      return;
+    }
+
+    System.out.println("---All speakers---");
+    String[] allSpeakers = manager.getAllSpeakerNames();
+    for (String s : allSpeakers) {
+      System.out.println(s);
+    }
+    System.out.println("------------");
+
+    String[] testFiles =
+        new String[] {
+          "./sr-data/test/fangjun-test-sr-1.wav",
+          "./sr-data/test/leijun-test-sr-1.wav",
+          "./sr-data/test/liudehua-test-sr-1.wav"
+        };
+
+    float threshold = 0.6f;
+    for (String file : testFiles) {
+      float[] embedding = computeEmbedding(extractor, file);
+
+      String name = manager.search(embedding, threshold);
+      if (name.isEmpty()) {
+        name = "<Unknown>";
+      }
+      System.out.printf("%s: %s\n", file, name);
+    }
+
+    // test verify
+    if (!manager.verify("fangjun", computeEmbedding(extractor, testFiles[0]), threshold)) {
+      System.out.printf("testFiles[0] should match fangjun!");
+      return;
+    }
+
+    if (!manager.remove("fangjun")) {
+      System.out.println("Failed to remove fangjun");
+      return;
+    }
+
+    if (manager.verify("fangjun", computeEmbedding(extractor, testFiles[0]), threshold)) {
+      System.out.printf("%s should match no one!\n", testFiles[0]);
+      return;
+    }
+
+    if (manager.getNumSpeakers() != 1) {
+      System.out.println("There should only 1 speaker left.");
+      return;
+    }
+
+    extractor.release();
+    manager.release();
+  }
+}

+#!/usr/bin/env bash
+
+set -ex
+
+if [[ ! -f ../build/lib/libsherpa-onnx-jni.dylib  && ! -f ../build/lib/libsherpa-onnx-jni.so ]]; then
+  mkdir -p ../build
+  pushd ../build
+  cmake \
+    -DSHERPA_ONNX_ENABLE_PYTHON=OFF \
+    -DSHERPA_ONNX_ENABLE_TESTS=OFF \
+    -DSHERPA_ONNX_ENABLE_CHECK=OFF \
+    -DBUILD_SHARED_LIBS=ON \
+    -DSHERPA_ONNX_ENABLE_PORTAUDIO=OFF \
+    -DSHERPA_ONNX_ENABLE_JNI=ON \
+    ..
+
+  make -j4
+  ls -lh lib
+  popd
+fi
+
+if [ ! -f ../sherpa-onnx/java-api/build/sherpa-onnx.jar ]; then
+  pushd ../sherpa-onnx/java-api
+  make
+  popd
+fi
+
+if [ ! -f ./3dspeaker_speech_eres2net_base_sv_zh-cn_3dspeaker_16k.onnx ]; then
+  curl -SL -O https://github.com/k2-fsa/sherpa-onnx/releases/download/speaker-recongition-models/3dspeaker_speech_eres2net_base_sv_zh-cn_3dspeaker_16k.onnx
+fi
+
+if [ ! -f ./sr-data/enroll/leijun-sr-1.wav ]; then
+  curl -SL -o sr-data.tar.gz https://github.com/csukuangfj/sr-data/archive/refs/tags/v1.0.0.tar.gz
+  tar xvf sr-data.tar.gz
+  mv sr-data-1.0.0 sr-data
+fi
+
+java \
+  -Djava.library.path=$PWD/../build/lib \
+  -cp ../sherpa-onnx/java-api/build/sherpa-onnx.jar \
+  ./SpeakerIdentification.java

@@ -51,6 +51,10 @@ java_files += AudioTaggingConfig.java
 java_files += AudioEvent.java
 java_files += AudioTagging.java
 
+java_files += SpeakerEmbeddingExtractorConfig.java
+java_files += SpeakerEmbeddingExtractor.java
+java_files += SpeakerEmbeddingManager.java
+
 class_files := $(java_files:%.java=%.class)
 
 java_files := $(addprefix src/$(package_dir)/,$(java_files))

@@ -14,7 +14,7 @@ public class AudioTaggingConfig {
     }
 
     public static Builder builder() {
-        return new AudioTaggingConfig.Builder();
+        return new Builder();
     }
 
     public static class Builder {

@@ -7,7 +7,7 @@ public class OfflineRecognizer {
         System.loadLibrary("sherpa-onnx-jni");
     }
 
-    private long ptr = 0; // this is the asr engine ptrss
+    private long ptr = 0;
 
     public OfflineRecognizer(OfflineRecognizerConfig config) {
         ptr = newFromFile(config);

@@ -7,7 +7,7 @@ public class OfflineTts {
         System.loadLibrary("sherpa-onnx-jni");
     }
 
-    private long ptr = 0; // this is the asr engine ptrss
+    private long ptr = 0;
 
     public OfflineTts(OfflineTtsConfig config) {
         ptr = newFromFile(config);

@@ -8,7 +8,7 @@ public class OnlineRecognizer {
         System.loadLibrary("sherpa-onnx-jni");
     }
 
-    private long ptr = 0; // this is the asr engine ptrss
+    private long ptr = 0;
 
 
     public OnlineRecognizer(OnlineRecognizerConfig config) {

+// Copyright 2024 Xiaomi Corporation
+
+package com.k2fsa.sherpa.onnx;
+
+public class SpeakerEmbeddingExtractor {
+    static {
+        System.loadLibrary("sherpa-onnx-jni");
+    }
+
+    private long ptr = 0;
+
+    public SpeakerEmbeddingExtractor(SpeakerEmbeddingExtractorConfig config) {
+        ptr = newFromFile(config);
+    }
+
+    @Override
+    protected void finalize() throws Throwable {
+        release();
+    }
+
+    public void release() {
+        if (this.ptr == 0) {
+            return;
+        }
+        delete(this.ptr);
+        this.ptr = 0;
+    }
+
+    public OnlineStream createStream() {
+        long p = createStream(ptr);
+        return new OnlineStream(p);
+    }
+
+    public boolean isReady(OnlineStream s) {
+        return isReady(ptr, s.getPtr());
+    }
+
+    public float[] compute(OnlineStream s) {
+        return compute(ptr, s.getPtr());
+    }
+
+    public int getDim() {
+        return dim(ptr);
+    }
+
+    private native void delete(long ptr);
+
+    private native long newFromFile(SpeakerEmbeddingExtractorConfig config);
+
+    private native long createStream(long ptr);
+
+    private native boolean isReady(long ptr, long streamPtr);
+
+    private native float[] compute(long ptr, long streamPtr);
+
+    private native int dim(long ptr);
+}

+// Copyright 2024 Xiaomi Corporation
+
+package com.k2fsa.sherpa.onnx;
+
+public class SpeakerEmbeddingExtractorConfig {
+    private final String model;
+    private final int numThreads;
+    private final boolean debug;
+    private final String provider;
+
+    private SpeakerEmbeddingExtractorConfig(Builder builder) {
+        this.model = builder.model;
+        this.numThreads = builder.numThreads;
+        this.debug = builder.debug;
+        this.provider = builder.provider;
+    }
+
+    public static Builder builder() {
+        return new Builder();
+    }
+
+    public static class Builder {
+        private String model = "";
+        private int numThreads = 1;
+        private boolean debug = true;
+        private String provider = "cpu";
+
+        public SpeakerEmbeddingExtractorConfig build() {
+            return new SpeakerEmbeddingExtractorConfig(this);
+        }
+
+
+        public Builder setModel(String model) {
+            this.model = model;
+            return this;
+        }
+
+        public Builder setNumThreads(int numThreads) {
+            this.numThreads = numThreads;
+            return this;
+        }
+
+        public Builder setDebug(boolean debug) {
+            this.debug = debug;
+            return this;
+        }
+
+        public Builder setProvider(String provider) {
+            this.provider = provider;
+            return this;
+        }
+    }
+
+}

+// 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);
+}

@@ -12,7 +12,7 @@ public class SpokenLanguageIdentification {
     }
 
     private final Map<String, String> localeMap;
-    private long ptr = 0; // this is the asr engine ptrss
+    private long ptr = 0;
 
     public SpokenLanguageIdentification(SpokenLanguageIdentificationConfig config) {
         ptr = newFromFile(config);