[alsa-devel] How to report error in _pointer function?
timur at freescale.com
Wed Aug 6 23:54:38 CEST 2008
Takashi Iwai wrote:
> You can return SNDRV_PCM_POS_XRUN from the pointer callback (with
> kernel messages if you like). Then the PCM stream is stopped and the
> status is changed to SND_PCM_STATUS_XRUN. Further access will result
> in -EPIPE.
This doesn't seem to work. I don't get any more underrun/overrun messages, but
the application doesn't know that something's failed.
With mplayer, I see this message:
alsa-lib: pcm_hw.c:405:(snd_pcm_hw_hwsync) SNDRV_PCM_IOCTL_HWSYNC failed: Broken
And then mplayer hangs with the status bar here:
A: 0.0 (00.0) of 249.0 (04:09.0) ??,?% $<50>
aplay just hangs.
I also tried adding this code to my _pointer function:
but it didn't make any difference.
Linux kernel developer at Freescale
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