Sandor Sz?cs wrote:
>Calculation: 22050 / (1*1/2) = 44100
>1 := mono
>1/2 := 4 Bit
>I think I missunderstood something or?
I was referring to the AudioFormat you specified for your mic input. I'm
not aware of any JavaSound Mixers or lines that directly input in 4-bit
format. Your encoded VOIP format may well be 4-bit, but a codec would have
to be translating a raw format like 8-bit or 16-bit into the 4-bit format.
If you look at the exception stack-trace, this is the top element:
at com.sun.media.sound.SimpleInputDevice$InputDeviceDataLine.read
That's in the read() method of a SimpleInputDevice's nested class. My guess
is the SimpleInputDevice represents the mic device's parent mixer, and the
InputDeviceDataLine is a TargetDataLine because it provides a read()
method. I come to that from seeing exactly that class listed as the Mixer
class for both built-in line/mic input and USB headset input on Mac OS X.
See this recent list thread, "Problems Using JavaSound":
<http://lists.apple.com/archives/java-dev/2006/Mar/msg00070.html>
However, since you said you also get the error for other formats, maybe
it's just a misleading clue.
If you're interested in using a Java VOIP library, as distinct from writing
it yourself, try googling for:
java voip open source
The OpenZoep project appears to do what you want, and unlike JMF, is in
active development.
-- GG
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