I have written a small Java application for testing purposes that captures sound from a mixer on ubuntu 12.04.
The code works fine, I can capture sound from all applications except for anything running under Wine. Whenever I start my program after having started wine, the call to targetDataLine.read() will block forever. When wine is not running in the background it correctly outputs 0 if there is no input, or the number of bytes read if there is input, as expected. If I start my program before starting wine, the sound driver will not be available within wine.
I have tried using both the mixers provided by alsa as well as the default device, same result. Ok, I could imagine that wine somehow locks alsa (for whatever reason), but why would a simple call to TargetDataLine.read() cause sound to fail in wine? mixerInfo[0] is default on my system btw, and the application is of course always running outside of wine using oracle's latest jre (7).
Code: Select all
private void readSound() {
byte tempBuffer[] = new byte[10000];
int cnt=0;
Mixer.Info[] mixerInfo =
AudioSystem.getMixerInfo();
System.out.println("Available mixers:");
for (int p = 0; p < mixerInfo.length;
p++) {
System.out.println(mixerInfo[p].getName());
}
format = getAudioFormat();
DataLine.Info dataLineInfo =
new DataLine.Info(
TargetDataLine.class,
format);
Mixer mixer = AudioSystem.getMixer(mixerInfo[0]);
try{
targetDataLine = (TargetDataLine) mixer.getLine(dataLineInfo);
targetDataLine.open(format);
}catch(Exception e){
e.printStackTrace();
}
targetDataLine.start();
while(true){
cnt = targetDataLine.read(tempBuffer,0,tempBuffer.length);
System.out.println("read "+cnt+");
targetDataLine.flush();
}
}
