At Wed, 07 Mar 2007 22:33:25 +0000, James Courtier-Dutton wrote: > > Takashi Iwai wrote: > > At Tue, 27 Feb 2007 15:52:41 +0100 (CET), > > Jaroslav Kysela wrote: > >> Hi, > >> > >> in 2.6 kernels, we can use ktime_get_ts() function to get > >> monotonic time which can be used for PCM timestamps. I would propose to > >> reuse the SNDRV_PCM_IOCTL_TSTAMP ioctl to enable using of monotonic clock. > >> The "enable" (int) argument might mean: > >> > >> 0: standard clock - getnstimeofday() > >> 1: standard clock - getnstimeofday() - for "compatibility" > >> 2: monotonic clock - ktime_get_ts() > > > > Good to add a new feature... but is there any user of this PCM > > timestamp so far? I see some good purposes but rarely seen in the > > reality, unfortunately... > > > > > > Takashi > > > > There are some good applications for it, but I have not got round to > writing them yet! Me too ;) But, I remember some difficulties regarding the timestamping at the last time I tried (quite ago). The timestamp is somewhat hard to use because it's updated at each pointer or status update although I wanted to get the exact time only at the period boundary. Maybe these usability issues should be sorted out all together. Takashi ------------------------------------------------------------------------- Take Surveys. Earn Cash. Influence the Future of IT Join SourceForge.net's Techsay panel and you'll get the chance to share your opinions on IT & business topics through brief surveys-and earn cash http://www.techsay.com/default.php?page=join.php&p=sourceforge&CID=DEVDEV _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.sourceforge.net/lists/listinfo/alsa-devel
