Name: rlT66838 Date: 07/07/2000


java version "1.3.0"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.3.0-C)
Java HotSpot(TM) Client VM (build 1.3.0-C, mixed mode)

My program contains the following lines:

  //line is an instance of TargetDataLine
  AudioInputStream ais = new AudioInputStream(line);
  AudioSystem.write(ais, AudioFileFormat.Type.AU, out);

This yields the following exception:

  java.io.IOException: stream length not specified
at com.sun.media.sound.AuFileWriter.write(Unknown Source)
at javax.sound.sampled.AudioSystem.write(Unknown Source)
at Capture.run(Capture.java:67)

The API documentation states:

"Some file types require that the length be written into the file header; such
files cannot be written from start to finish unless the length is known in
advance. An attempt to write a file of such a type will fail with an
IOException if the length in the audio file type is AudioSystem.NOT_SPECIFIED."

However, AU files do not require their length to be written into the file
header (according to e.g.
http://www.opennc.org/public/pubs/external/auformat.html). Hence the API
documentation does not explain why the exception is thrown.

If I decompile AuFileWriter it turns out that there is a simple check of the
length and if this equals -1 (AudioSystem.NOT_SPECIFIED), an exception is
thrown. I believe this is incorrect behaviour.
(Review ID: 106960)
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