Hi Stefan, I did what ;you suggested and compiled the testasubsystem program. Using this program, Ihave ascertained that the audiosubsystem gets data, it reads the data, puts the data into the fragment buffer and writes the data to the sound card. HOWEVER, for some mysterious reason, I don't get the sine wave sound on my audio output but more like a hammering. I checked all the parameters (encoding, sample rate, bits/sample etc), everything appears to be allright. Byte swapping doesn't make any difference either. Do you have any suggestion or idea what might be missing here??? Have a great weekend, Nikolaus Stefan Westerfeld wrote: > Hi! > > On Fri, Dec 01, 2000 at 12:55:26AM +0800, Nikolaus J. Sucher wrote: > > Stefan Westerfeld wrote: > > > > > Hi! > > > > > > On Thu, Nov 30, 2000 at 11:00:25AM +0800, Nikolaus J. Sucher wrote: > > > > > 2. reimplement handleIO(), call needMore() exactly once > > > > > > > > OK! > > > > > > > > > and write through > > > > > the result to the audio device (the encoding aRts produces is signed, > > > > > 16bit, little endian) > > > > > > > > I am very close. One more question: what is the name of the buffer where the >data goes > > > > that comes from the producer (producer->needMore();). How do I "write >through"? I am > > > > not sufe yet if I have to convert from little endian to bigendian or not. I >will check > > > > on that. > > > > > > producer->needMore will lead to a call of AudioSubSystem::write - the OSS > > > implementation puts the data in wBuffer, and later (in handleIO) gets it > > > from there and writes it to the audio device. > > > > > > So you can either keep that mechanism, then you can write what is in > > > wBuffer after calling needMore, or reimplement AudioSubSystem::write to > > > "write through" directly. > > > > Sorry, that I keep bothering about this but I am still learning... > > I am stuck here. I don't know how to actually read what is in the wBuffer. I only >get > > click, click, click from my audio, no matter what I try. When I check the OSS > > implementation, it appears as if I never get anything into the fragment_buffer >except > > zeroes???? > > I very much appreciate your help and patience!! > > What might be helpful is if you don't try to get artsd working at first, but > testasubsys (which is in kdelibs/arts/examples - you need to do make check > to get it compiled). It plays a 2 seconds sine wave. That should be suitable > for testing. > > With artsd, the normal thing you should expect when you start it is getting > zeros, and only if you use applications, like artsplay, kaiman, artsbuilder > or similar, you'll get some sound. > > Cu... Stefan > -- > -* Stefan Westerfeld, [EMAIL PROTECTED] (PGP!), Hamburg/Germany > KDE Developer, project infos at http://space.twc.de/~stefan/kde *-
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