[speex-dev] JSpeex help

Fri Dec 5 00:21:52 PST 2003

    Hi Sanjiv,

    There does indeed appear to be some trouble with
the Javasound SPI encoder (the SPI decoder works well).
I am working on it, and hope to have a fix soon. In the
mean time, you can use the encoder outside of
JavaSound, that one works well (see the command line
encoder as example code of how to implement it).

    sincerely

    Marc Gimpel
    Head of research
    Wimba

<p>On Thu, 4 Dec 2003 12:31:50 -0500, "Sanjiv Desai"
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Subject: [speex-dev] JSpeex help
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I am not sure if this is right place to ask for 
help on jspeex or can some one suggest. I have tried on
jspeex sourceforge.net 
page.

I am trying to use Pcm2SpeexAudioInputStream by 
creating it from tdl which received pcm_signed audio
data as 
follows:AudioFormat format = new AudioFormat 
(AudioFormat.Encoding.PCM_SIGNED, 8000, 16, 1, 2, 8000,
true);DataLine.Info 
targetInfo = new DataLine.Info (TargetDataLine.class,
format, 
8000);TargetDataLine tdl = (TargetDataLine)
AudioSystem.getLine 
(targetInfo);AudioInputStream auin=new AudioInputStream 
(tdl);PipedOutputStream pout=new
PipedOutputStream();PipedInputStream 
pin=new PipedInputStream(pout);pcm2speex=new
Pcm2SpeexAudioInputStream (pin, 
format, 
AudioSystem.NOT_SPECIFIED);tdl.open(format,8000);t.input.start();double 
ratio = t.bufferlength / t.framelength; byte[]
frame=new 
byte[t.framelength];while(true) {  int
n=auin.read(frame, 0, 
frame.length);  System.out.println(""+n+" bytes
read.");  
pout.write(frame);  int m=pcm2speex.read();  
System.out.println(""+m+" bytes read - 2.");}
But, when I run, it waits in auin.read. I tried 
using speexEncoder to manually process data, but I get
only noise as compressed 
data. It took about 200 ms to encode each frame. Also,
I am wondering, if 
preprocessing setting like echo cancellation is
possible with this version. How 
can I check for silence when vad and dtx turned on. Is
it possible to control 
the length of silence before triggering dtx(end of
speech)? Is next version with 
floating point to int conversion, AGC, denoiser etc and
other features of speex 
1.1.3, going to be released soon?
I will appreciate any help on sample code to do 
real-time encoding from targetDataLine.
I have tried java sound spi provided, and tried 
using SpeexFormatConvertionProvider,
SpeexAudioFileWriter etc, but nothing seems 
to work. I know that its going to be some thing very
simple, I am missing or not 
using properly.
Thanks.

--------------------
Marc Gimpel
Project Manager
Wimba.com
http://www.wimba.com
--------------------
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