Add Java API for speech enhancement GTCRN models (#2009)

java-api-examples/NonStreamingSpeechEnhancementGtcrn.java

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+// Copyright 2025 Xiaomi Corporation
+
+// This file shows how to use speech enhancement models in sherpa-onnx
+//
+// please download files in this script from
+// https://github.com/k2-fsa/sherpa-onnx/releases/tag/speech-enhancement-models
+
+import com.k2fsa.sherpa.onnx.*;
+
+public class NonStreamingSpeechEnhancementGtcrn {
+  public static void main(String[] args) {
+    String model = "./gtcrn_simple.onnx";
+    OfflineSpeechDenoiserGtcrnModelConfig gtcrn =
+        OfflineSpeechDenoiserGtcrnModelConfig.builder().setModel(model).build();
+
+    OfflineSpeechDenoiserModelConfig modelConfig =
+        OfflineSpeechDenoiserModelConfig.builder()
+            .setGtcrn(gtcrn)
+            .setNumThreads(1)
+            .setDebug(true)
+            .setProvider("cpu")
+            .build();
+    OfflineSpeechDenoiserConfig config =
+        OfflineSpeechDenoiserConfig.builder().setModel(modelConfig).build();
+
+    OfflineSpeechDenoiser speech_denoiser = new OfflineSpeechDenoiser(config);
+
+    String testWaveFilename = "./inp_16k.wav";
+    WaveReader reader = new WaveReader(testWaveFilename);
+
+    DenoisedAudio denoised = speech_denoiser.run(reader.getSamples(), reader.getSampleRate());
+    String outFilename = "enhanced-16k.wav";
+    WaveWriter.write(outFilename, denoised.getSamples(), denoised.getSampleRate());
+    System.out.printf("Saved to %s\n", outFilename);
+
+    speech_denoiser.release();
+  }
+}

java-api-examples/run-non-streaming-speech-enhancement-gtcrn.sh

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+#!/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 ./gtcrn_simple.onnx ]; then
+  curl -SL -O https://github.com/k2-fsa/sherpa-onnx/releases/download/speech-enhancement-models/gtcrn_simple.onnx
+fi
+
+if [ ! -f ./inp_16k.wav ]; then
+  curl -SL -O https://github.com/k2-fsa/sherpa-onnx/releases/download/speech-enhancement-models/inp_16k.wav
+fi
+
+java \
+  -Djava.library.path=$PWD/../build/lib \
+  -cp ../sherpa-onnx/java-api/build/sherpa-onnx.jar \
+  NonStreamingSpeechEnhancementGtcrn.java