[英]Java - Playing recorded audio - LineUnavailableException
我正在用Java將一些音頻記錄到ByteArrayOutputStream中,但是當我嘗試播放該字節數組時,出現LineUnavailableException。 這是我播放音頻的代碼:
public void playTone(ByteArrayOutputStream
try {
AudioFormat format = new AudioFormat(44100, 8, 2, true, true);
DataLine.Info info = new DataLine.Info(TargetDataLine.class, format);
byte audio[] = note.toByteArray();
InputStream input = new ByteArrayInputStream(audio);
TargetDataLine line1 = (TargetDataLine) AudioSystem.getLine(info);
...
} catch (LineUnavailableException e1) {
e1.printStackTrace();
}
}
這是我得到的例外:
javax.sound.sampled.LineUnavailableException: line with format PCM_SIGNED 44100.0 Hz, 8 bit, stereo, 2 bytes/frame, not supported.
現在,我已經在此問題中閱讀到,AudioFormat的參數可能是錯誤的,但是在該問題中,用戶使用24(位)作為第二個參數,其中僅支持8和16。
有人知道我在做什么錯嗎?
編輯:
從以下答案中,我更改了以下內容,因為我沒有文件,但是有ByteArrayOutputStream:
AudioFormat format = new AudioFormat(44100, 16, 2, true, true);
byte audio[] = note.toByteArray();
InputStream input = new ByteArrayInputStream(audio);
audioStream = new AudioInputStream(input, format, audio.length / format.getFrameSize());
// instead of
// audioStream = AudioSystem.getAudioInputStream(soundFile);
您可以從中清除您的概念。 我認為這對您有幫助。
import java.io.File;
import java.io.IOException;
import javax.sound.sampled.AudioFormat;
import javax.sound.sampled.AudioInputStream;
import javax.sound.sampled.AudioSystem;
import javax.sound.sampled.DataLine;
import javax.sound.sampled.LineUnavailableException;
import javax.sound.sampled.SourceDataLine;
public class MakeSound {
private final int BUFFER_SIZE = 128000;
private File soundFile;
private AudioInputStream audioStream;
private AudioFormat audioFormat;
private SourceDataLine sourceLine;
/**
* @param filename the name of the file that is going to be played
*/
public void playSound(String filename){
String strFilename = filename;
try {
soundFile = new File(strFilename);
} catch (Exception e) {
e.printStackTrace();
System.exit(1);
}
try {
audioStream = AudioSystem.getAudioInputStream(soundFile);
} catch (Exception e){
e.printStackTrace();
System.exit(1);
}
audioFormat = audioStream.getFormat();
DataLine.Info info = new DataLine.Info(SourceDataLine.class, audioFormat);
try {
sourceLine = (SourceDataLine) AudioSystem.getLine(info);
sourceLine.open(audioFormat);
} catch (LineUnavailableException e) {
e.printStackTrace();
System.exit(1);
} catch (Exception e) {
e.printStackTrace();
System.exit(1);
}
sourceLine.start();
int nBytesRead = 0;
byte[] abData = new byte[BUFFER_SIZE];
while (nBytesRead != -1) {
try {
nBytesRead = audioStream.read(abData, 0, abData.length);
} catch (IOException e) {
e.printStackTrace();
}
if (nBytesRead >= 0) {
@SuppressWarnings("unused")
int nBytesWritten = sourceLine.write(abData, 0, nBytesRead);
}
}
sourceLine.drain();
sourceLine.close();
}
}
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