Sandor Sz?cs wrote:
>I get this message:
>format: LINEAR, 44100.0 Hz, 16-bit, Stereo
>DEBUG: available locator: javasound://44100
>DEBUG: used format: javasound://44100
>Exception in thread "JavaSound PushThread"
>java.lang.IllegalArgumentException: Illegal request to write non-
>integral number of frames (22050 bytes )
> at com.sun.media.sound.SimpleInputDevice$InputDeviceDataLine.read
>(SimpleInputDevice.java:514)
> at com.sun.media.protocol.javasound.PushThread.process
>(JavaSoundSourceStream.java:790)
> at com.sun.media.util.LoopThread.run(LoopThread.java:135)
My guess is that the problem is just what the message of the
IllegalArgumentException says it is. You are asking the audio-device to
transfer a number of bytes that isn't an integral number of sampled-audio
frames, for the format in use.
Your format is 44100 Hz, 16-bit, stereo. That means each sample-frame is
two 16-bit samples, or 4 bytes. Apparently, the transfer-size you're using
is 22050 bytes in length. Divide 22050 bytes by 4 and you get 5512.5,
which is non-integral: i.e. not an integer number. In effect, you're
asking to transfer only half of the last sample-frame.
Pick a transfer size (or buffer size) that is an exact integer multiple of
4 bytes, and the IllegalArgumentException should disappear.
Or use mono format, which has 2 bytes per sample-frame and does divide
integrally into 22050. I don't see much reason to sample in stereo for
transmission as VOIP, but I may be missing something.
-- GG
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