Re: OpenAL for voicechat

After spending some more hours on debugging the code, I found out that the problem was caused by how I used the speex codec. It is not possible to initialize the decoder once and use it for different streams. You have to initialize a decoder for each stream, otherwise the streams affect each other.

The OpenAL code how I posted it works great for streaming. So thumbs up for OpenAL!!!

And again I want to thank you for helping me!

Best regards,
Peter Soxberger


-------- Original-Nachricht --------
> Datum: Tue, 26 Jan 2010 22:15:38 +0000
> Von: Dan Peacock <[email protected]>
> An: [email protected]
> Betreff: Re: [Openal] OpenAL for voicechat

> To determine which OpenAL device you are using, you need to call
> alcGetString(pDeviceHandle, ALC_DEVICE_SPECIFIER) after the call to
> alcOpenDevice(NULL).  It could be something like "SB X-Fi [E000]" or
> "Generic Software" etc ...
> 
> Your understanding of the buffer queue is correct, but in the
> real-world the packets are going to arrive out of sync with processed
> buffers.  Also, the number of processed buffers could vary too
> depending upon which OpenAL device you are using and what ever else
> the PC is doing at the time.  Your code will need to handle these
> situations.  Specifically - what happens if you have received a packet
> and there are no processed buffers?  What happens if an AL buffer has
> been processed but you have not received any new audio data?
> 
> Dan
> 
> On Tue, Jan 26, 2010 at 5:42 PM, Peter Soxberger
> <[email protected]> wrote:
> > Windows Vista and OpenAL 1.1
> >
> > 1) Maybe I missunderstood the princip of the buffer queue but I thought
> it works like this:
> >
> > - I create 4 buffers
> > - I add all 4 buffers to the queue
> > - I start playing the source
> > -> A new packet arrives
> > - I use processed to see if there are free buffers
> > - I unqueue one buffer and fill it with data
> > - I add the buffer to the queue again
> > (- if source stopped playing start again)
> > -> A new packet arrives
> > - I use processed to see if there are free buffers
> > - I unqueue one buffer and fill it with data
> > - I add the buffer to the queue again
> > (- if source stopped playing start again)
> > .
> > .
> > .
> > and so on
> >
> > Isn't that correct? Do I have to unqueue all buffers that are processed
> in order to prevent that the processed buffers are played again?
> > Or do you mean that I should only use 2 buffers?
> >
> > Best regards,
> > Peter Soxberger
> >
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