On Fri, Dec 28, 2018 at 01:21:24PM +0900, Takashi Sakamoto wrote: > On Fri, Dec 28, 2018 at 12:45:49PM +0900, Takashi Sakamoto wrote: > > I note that there're some levels of timestamp and autio timestamp. > > Additionally, audio timestamp is updated only in any hardware/software IRQs, > > thus it's not available with 'no-period-wakeup' runtime, FYI. > > Oops. No, the audio timestamp can be updated in updating process of > hardware pointer. A call of ioctl with SNDRV_PCM_IOCTL_STATUS and > SNDRV_PCM_IOCTL_STATUS_EXT can return updated audio timestamp. Thank you for the explanation! Regarding the alsa-lib, pcm_hw, htimestamp(): Although not needed, adding a 'break' in the loop when 'mmap_status_fallbacked' is true would avoid another ioctl. Cheers! pasquali _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
