我正在尝试编写一个小程序来读取 wav 文件并发送输出,就好像它来自我的麦克风一样。不幸的是我对声音 API 没有太多经验。
背景:我基本上想要实现的是一个在我进行语音聊天时播放声音的程序(即 Teamspeak、Ventrilo)。为了让它现在工作,我必须将录音设备切换到“你听到的”,播放声音,然后切换回麦克风。该程序应该模拟来自麦克风的输入。
到目前为止,我除了播放声音之外无法做任何进一步的事情。我想我只需要一个不同的 SourceLine ?
public class Player {
private final int BUFFER_SIZE = 128000;
private AudioInputStream audioStream;
private AudioFormat audioFormat;
private SourceDataLine sourceLine;
public void playSound(File soundFile) {
try {
audioStream = AudioSystem.getAudioInputStream(soundFile);
} catch (Exception e) {
e.printStackTrace();
System.exit(1);
}
audioFormat = audioStream.getFormat();
DataLine.Info infoIn = new DataLine.Info(SourceDataLine.class,
audioFormat);
try {
sourceLine = (SourceDataLine) AudioSystem.getLine(infoIn);
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();
}
}
解决方案:安装 VB 音频线(http://vb-audio.pagesperso-orange.fr/Cable/ http://vb-audio.pagesperso-orange.fr/Cable/)。这是捐赠软件。制作VB-Output标准录音设备。在麦克风属性中选择 VB-Input 作为播放。
public class Player {
private final int BUFFER_SIZE = 128000;
private AudioInputStream audioStream;
private AudioFormat audioFormat;
private SourceDataLine sourceLine;
public void playSound(File soundFile) {
try {
audioStream = AudioSystem.getAudioInputStream(soundFile);
} catch (Exception e) {
e.printStackTrace();
System.exit(1);
}
audioFormat = audioStream.getFormat();
DataLine.Info infoIn = new DataLine.Info(SourceDataLine.class,
audioFormat);
try {
Mixer.Info[] mixerInfos = AudioSystem.getMixerInfo();
Mixer mixer = null;
for (int i = 0; i < mixerInfos.length; i++) {
System.out.println(mixerInfos[i].getName());
if (mixerInfos[i].getName().equals(
"CABLE Input (VB-Audio Virtual Cable)")) {
mixer = AudioSystem.getMixer(mixerInfos[i]);
break;
}
}
sourceLine = (SourceDataLine) mixer.getLine(infoIn);
sourceLine.open(audioFormat);
} catch (LineUnavailableException 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();
}
}