Fun-ASR realtime Java SDK

import com.alibaba.dashscope.audio.asr.recognition.Recognition;
import com.alibaba.dashscope.audio.asr.recognition.RecognitionParam;
import com.alibaba.dashscope.utils.Constants;

import java.io.File;

public class Main {
  public static void main(String[] args) {
    Constants.baseWebsocketApiUrl = "wss://dashscope-intl.aliyuncs.com/api-ws/v1/inference";
    // Create a Recognition instance.
    Recognition recognizer = new Recognition();
    // Create a RecognitionParam.
    RecognitionParam param =
        RecognitionParam.builder()
            .model("fun-asr-realtime")
            // If you have not configured an environment variable, replace the following line with your API key: .apiKey("sk-xxx")
            .apiKey(System.getenv("DASHSCOPE_API_KEY"))
            .format("wav")
            .sampleRate(16000)
            .parameter("language_hints", new String[]{"zh", "en"})
            .build();

    try {
      System.out.println("Recognition result: " + recognizer.call(param, new File("asr_example.wav")));
    } catch (Exception e) {
      e.printStackTrace();
    } finally {
      // Close the WebSocket connection after the task is complete.
      recognizer.getDuplexApi().close(1000, "bye");
    }
    System.out.println(
        "[Metric] requestId: "
            + recognizer.getLastRequestId()
            + ", first package delay ms: "
            + recognizer.getFirstPackageDelay()
            + ", last package delay ms: "
            + recognizer.getLastPackageDelay());
    System.exit(0);
  }
}

import com.alibaba.dashscope.audio.asr.recognition.Recognition;
import com.alibaba.dashscope.audio.asr.recognition.RecognitionParam;
import com.alibaba.dashscope.exception.NoApiKeyException;
import com.alibaba.dashscope.utils.Constants;
import io.reactivex.BackpressureStrategy;
import io.reactivex.Flowable;

import javax.sound.sampled.AudioFormat;
import javax.sound.sampled.AudioSystem;
import javax.sound.sampled.TargetDataLine;
import java.nio.ByteBuffer;

public class Main {
  public static void main(String[] args) throws NoApiKeyException {
    Constants.baseWebsocketApiUrl = "wss://dashscope-intl.aliyuncs.com/api-ws/v1/inference";
    // Create a Flowable<ByteBuffer>.
    Flowable<ByteBuffer> audioSource =
        Flowable.create(
            emitter -> {
              new Thread(
                  () -> {
                    try {
                      // Create an audio format.
                      AudioFormat audioFormat = new AudioFormat(16000, 16, 1, true, false);
                      // Match the default recording device based on the format.
                      TargetDataLine targetDataLine =
                          AudioSystem.getTargetDataLine(audioFormat);
                      targetDataLine.open(audioFormat);
                      // Start recording.
                      targetDataLine.start();
                      ByteBuffer buffer = ByteBuffer.allocate(1024);
                      long start = System.currentTimeMillis();
                      // Record for 50 seconds and perform real-time transcription.
                      while (System.currentTimeMillis() - start < 50000) {
                        int read = targetDataLine.read(buffer.array(), 0, buffer.capacity());
                        if (read > 0) {
                          buffer.limit(read);
                          // Send the recorded audio data to the streaming recognition service.
                          emitter.onNext(buffer);
                          buffer = ByteBuffer.allocate(1024);
                          // The recording rate is limited. Sleep for a short period to prevent high CPU usage.
                          Thread.sleep(20);
                        }
                      }
                      // Notify that the transcription is complete.
                      emitter.onComplete();
                    } catch (Exception e) {
                      emitter.onError(e);
                    }
                  })
                  .start();
            },
            BackpressureStrategy.BUFFER);

    // Create a Recognition instance.
    Recognition recognizer = new Recognition();
    // Create a RecognitionParam and pass the created Flowable<ByteBuffer> in the audioFrames parameter.
    RecognitionParam param = RecognitionParam.builder()
        .model("fun-asr-realtime")
        // If you have not configured an environment variable, replace the following line with your API key: .apiKey("sk-xxx")
        .apiKey(System.getenv("DASHSCOPE_API_KEY"))
        .format("pcm")
        .sampleRate(16000)
        .build();

    // Call the streaming interface.
    recognizer
        .streamCall(param, audioSource)
        .blockingForEach(
            result -> {
              // Subscribe to the output result.
              if (result.isSentenceEnd()) {
                System.out.println("Final Result: " + result.getSentence().getText());
              } else {
                System.out.println("Intermediate Result: " + result.getSentence().getText());
              }
            });
    // Close the WebSocket connection after the task is complete.
    recognizer.getDuplexApi().close(1000, "bye");
    System.out.println(
        "[Metric] requestId: "
            + recognizer.getLastRequestId()
            + ", first package delay ms: "
            + recognizer.getFirstPackageDelay()
            + ", last package delay ms: "
            + recognizer.getLastPackageDelay());
    System.exit(0);
  }
}

RecognitionParam param = RecognitionParam.builder()
  .model("fun-asr-realtime")
  .format("pcm")
  .sampleRate(16000)
  .parameter("language_hints", new String[]{"zh", "en"})
  .build();

ResultCallback<RecognitionResult> callback = new ResultCallback<RecognitionResult>() {
  @Override
  public void onEvent(RecognitionResult result) {
    System.out.println("RequestId is: " + result.getRequestId());
    // Implement the logic to process the speech recognition result here.
  }

  @Override
  public void onComplete() {
    System.out.println("Task complete");
  }

  @Override
  public void onError(Exception e) {
    System.out.println("Task failed: " + e.getMessage());
  }
};