Hi Clemens,

thanks for your replay. Sorry about the delay, I was taking care of high priority tasks.

Back to my problem, I'm convinced that I'm passing the correct number of frames. Do I have to change the buffer if discarding non complete buffers (<> 160bytes)?

I'm not sure how timing is managed since my function is called by a third part application but it looks like my code is invoked in a "for" loop. Next is part of the code which calls my function:

for (cur = f, next = AST_LIST_NEXT(cur, frame_list); cur; cur = next, next = cur ? AST_LIST_NEXT(cur, frame_list) : NULL) { if (!skip) { if ((res = chan->tech->write(chan, cur)) < 0) { chan->_softhangup |= AST_SOFTHANGUP_DEV; skip = 1; } else if (next) { /* don't do this for the last frame in the list, as the code outside the loop will do it once */ chan->fout = FRAMECOUNT_INC(chan->fout); } } ast_frfree(cur); }

I sent a copy of my code to pastbin. It is available at: http://www.pastebin.org/48749

I would be glad if you take a look at it.

Thanks for your time. Regards, Douglas

On Fri, Oct 23, 2009 at 5:39 AM, Clemens Ladisch clemens@ladisch.de wrote:

Douglas Lopes Pereira wrote:

...

I'm splitting my audio data into 160 bytes buffers but when buffer with different size is passed to that function I hear a noise (like 'Krrr') on my audio device.

Do you actually pass the correct number of frames?

How do you manage the timing of the snd_pcm_writei() calls?

Best regards, Clemens