Mp3AudioFileEncoder.java

package ch.retorte.intervalmusiccompositor.encoder;

import javax.sound.sampled.AudioFormat;
import javax.sound.sampled.AudioInputStream;
import javax.sound.sampled.UnsupportedAudioFileException;

import ch.retorte.intervalmusiccompositor.spi.progress.ProgressListener;
import ch.retorte.intervalmusiccompositor.spi.encoder.AudioFileEncoder;
import ch.retorte.intervalmusiccompositor.spi.progress.ProgressUpdatable;

import java.io.File;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Paths;

/**
 * @author nw
 */
public class Mp3AudioFileEncoder implements AudioFileEncoder, ProgressUpdatable {

  private static final String EXTENSION = "mp3";

  private LameByteArrayEncoder encoder;
  private ProgressListener progressListener;

  public void encode(AudioInputStream audioInputStream, long streamLengthInBytes, File outputFile) throws UnsupportedAudioFileException, IOException {
    createEncoderWithSettings(audioInputStream.getFormat());
    Files.write(Paths.get(outputFile.getAbsolutePath()), encodeToMp3(audioInputStream, streamLengthInBytes));
  }

  private void createEncoderWithSettings(AudioFormat audioFormat) {
    encoder =  new LameByteArrayEncoder(audioFormat, progressListener);
  }

  private byte[] encodeToMp3(AudioInputStream audioInputStream, long streamLengthInBytes) throws IOException {
    return encoder.encodeToMp3(audioInputStream, streamLengthInBytes);
  }

  public boolean isAbleToEncode() {
    return true;
  }

  public String getFileExtension() {
    return EXTENSION;
  }

  public String getIdentificator() {
    return EXTENSION;
  }

  @Override
  public void setProgressListener(ProgressListener progressListener) {
    this.progressListener = progressListener;
  }
}