Programming KDEArts, how?
j.windmeisser at elogix.info
Wed Dec 10 17:04:48 GMT 2003
Am Mittwoch, 10. Dezember 2003 17.21 schrieb Arnold Krille:
> Sorry, didn't notice your first mail on monday. (was busy)
> On Wednesday 10 December 2003 17:00, Jorge wrote:
> > I've tried to use KAudioPlayStream, with negative results. The problem is
> > that the whole thing isn't really described, or I haven't found it.
> > Has anyone links to docus for KAudioPlayStream?
> Yes. The link is in the reply-to of this mail ;-)
A living docu! :)
> Your are right, KAudioPlayStream isn't fully developed. It just works in
> polling-mode. In that mode the signal requestData( QByteArray ) is emitted
> and you have to fill the array with your data. start and stop should be
> self-explaining, I hope.
Yes, after donwloading kartsserver, kaudiomanagerplay, kaudioplaystream,
etc..., adapting them so that the thing compiles on my config, I noticed that
the ::write(...) method was empty! ;) BTW, the QByteArray thing drives me
crazy! I dunno how to use the beast!
My code looks is:
stream = arts_play_stream( 8012, 8, 1, "artsctest" );
while ( sockData->getData(data,16)) /* buffer, bytes */
bzero( bufferOut, sizeof( bufferOut ) );
for (int index = 0; index < 16; index++)
out_int = mulaw[(unsigned char)data[i]]; /* mu-law to linear */
out_int = out_int >> 8; /* rescale for 8 bit values */
out_val = out_int+128; /* convert to .WAV format */
bufferOut[index] = out_val; /* write the output byte */
errorcode = arts_write(stream, &bufferOut, sizeof(bufferOut));
if (errorcode < 0)
KMessageBox::error(0, i18n( "writing to arts server" ) );
The problem is that the response isn't very good (the data is coming from a
server) and that it, obviously, freezes the program until the while is
> For a example see the sources of KRec (in kde-multimedia). It uses the
> KAudio*Stream classes...
Hmmm, that means wading through the internet, do you have the relevant
sources? If you, could you mail them to me?
Thank you for your help. Jorge Windmeisser
www.elogix.info or www.elogix.ch
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