Re: [alsa-devel] [PATCH] alsa-lib: snd_pcm_delay and friends do not account for a write being currently in progress

VDR User wrote:

I've been getting "pcm_hw.c: snd_pcm_hw_delay() SNDRV_PCM_IOCTL_DELAY failed." in my xine log

The actual error (code) is missing.

and after some talks with one of the devs, he suggested that alsa was not getting data fast enough in some cases (iirc).

That would be an underrun. This has nothing to do with the interpretation of snd_pcm_delay's return value; this function just appears in the log because it happend to be the first one that detected this error condition. An underrung cannot be prevented by any change in alsa-lib; xine needs to use a larger buffer, or the scheduling needs to be improved so that some other thread or program doesn't prevent xine from being executed.

Regards, Clemens