使用谷歌服务把音频pcm识别成文字的java代码

您可以使用Google Cloud Speech-to-Text API将音频PCM识别成文字。以下是Java代码示例：

1. 首先，您需要设置Google Cloud凭据和API客户端：

import com.google.auth.oauth2.GoogleCredentials;
import com.google.cloud.speech.v1.*;
import com.google.protobuf.ByteString;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.List;

public class SpeechToText {
  
  public static void main(String[] args) throws Exception {
    // Set the credentials
    GoogleCredentials credentials = GoogleCredentials.fromStream(new FileInputStream("path/to/credentials.json"));
    SpeechClient speechClient = SpeechClient.create(SpeechSettings.newBuilder().setCredentialsProvider(FixedCredentialsProvider.create(credentials)).build());

    // The path to the audio file to transcribe
    String audioFilePath = "path/to/audio.pcm";

    // The language of the audio file
    String languageCode = "en-US";

    // The sample rate of the audio file
    int sampleRate = 16000;

    // Transcribe the audio file
    String text = transcribeAudioFile(speechClient, audioFilePath, languageCode, sampleRate);

    // Print the transcribed text
    System.out.println(text);
  }

  // Transcribes the given audio file using the Google Cloud Speech-to-Text API
  public static String transcribeAudioFile(SpeechClient speechClient, String audioFilePath, String languageCode, int sampleRate) throws IOException {
    // Read the audio file
    Path path = Paths.get(audioFilePath);
    byte[] data = Files.readAllBytes(path);
    ByteString audioBytes = ByteString.copyFrom(data);

    // Configure the recognition request
    RecognitionConfig config = RecognitionConfig.newBuilder()
        .setEncoding(RecognitionConfig.AudioEncoding.LINEAR16)
        .setSampleRateHertz(sampleRate)
        .setLanguageCode(languageCode)
        .build();
    RecognitionAudio audio = RecognitionAudio.newBuilder().setContent(audioBytes).build();

    // Recognize the audio file
    RecognizeResponse response = speechClient.recognize(config, audio);
    List<SpeechRecognitionResult> results = response.getResultsList();

    // Concatenate the transcribed text from each result
    StringBuilder sb = new StringBuilder();
    for (SpeechRecognitionResult result : results) {
      List<SpeechRecognitionAlternative> alternatives = result.getAlternativesList();
      for (SpeechRecognitionAlternative alternative : alternatives) {
        sb.append(alternative.getTranscript());
      }
    }
    return sb.toString();
  }

}

2. 在您的项目中添加以下依赖项：

<dependency>
  <groupId>com.google.cloud</groupId>
  <artifactId>google-cloud-speech</artifactId>
  <version>2.2.0</version>
</dependency>
<dependency>
  <groupId>com.google.auth</groupId>
  <artifactId>google-auth-library-oauth2-http</artifactId>
  <version>0.22.2</version>
</dependency>

请注意，您需要替换代码中的“path/to/credentials.json”和“path/to/audio.pcm”为实际的凭据和音频文件路径。