how can we know if the microphone is functioning using jmf?
Hi everybody,
This code never output "DataSource Not detected" neither the microphone is connected or not.
CaptureDeviceInfo deviceInfo = (CaptureDeviceInfo) CaptureDeviceManager.getDeviceList(new AudioFormat(AudioFormat.LINEAR, 44100, 16, 1)).get(0);
DataSource inSource=Manager.createDataSource(deviceInfo.getLocator());
if(inSource.equals(null)) {System.out.println("DataSource Not detected");}
why inSource is never null?
how can we notify the user when no data is captured?
thx
[532 byte] By [
zinounaa] at [2007-11-27 0:41:57]
# 1
I wanted to add that even with this code handling exceptions, exceptions are not displayed even if the microphone is not connected!
CaptureDeviceInfo deviceInfo = (CaptureDeviceInfo) CaptureDeviceManager.getDeviceList(newAudioFormat(AudioFormat.LINEAR, 44100, 16, 1)).get(0);
DataSource inSource = createDataSource(deviceInfo.getLocator());
protected DataSource createDataSource(MediaLocator locator)
{
try {
try {
return Manager.createDataSource(locator);
}
catch (NoDataSourceException ex) {
{System.out.println("NoDataSourceException: "+ex);
}
//The failure only concens us
return null;
}
catch (IOException ex) {
System.out.println("IOException: "+ex);
//The failure only concens us
return null;
}
}
finally {
}
}
please help if you have an answer
# 2
I am not entirely sure I understand the problem
you are facing, but had some problems detecting
sound signals in an 'oscilloscope' style sound
based application, myself.
(Part of) my solution was to check on the signal
level being received, and ultimately I decided to
paint the signal level over the GUI. You might
get some tips from that example.
You can view the trace itself by following the
'install Audio Trace' link here..
http://www.physci.org/sound/audiotrace.html
The source (fairly recent) of the application can
be viewed/downloaded here..
http://www.physci.org/test/oscilloscope/
..look for the 'averageLevel' attribute, and work
back from there.
Message was edited by:
AndrewThompson64
