On Thu, May 14, 2020 at 03:52:25PM +0200, Jaroslav Kysela wrote: > NAK: You should not call drain when the PCM handle is in the SETUP field. > It's an obvious caller problem. The streaming should be active somehow. The pb here is the non-blocking calls of the drain function: in my test case, the first call to the drain function switches the pcm in draining state, but the pcm will be switched to the setup state somewhen in between 2 drain function calls! Naively, I was calling the drain function on a regular time basis to see if the draining was finished, namely expecting 0 to be returned. Then if I understood you well, the right way(tm) to use the drain function in non-block mode, is to call only once the drain function, then inspect the state of the pcm till it not anymore in the draining state. Am I right? Or did I miss something again? regards, -- Sylvain
