On Saturday 24 October 2009 23:56:24 Sakari Ailus wrote:
> Ivan T. Ivanov wrote:
> > Hi Sakari,
>
> Hi,
>
> > On Fri, 2009-10-23 at 13:18 +0300, Sakari Ailus wrote:
> [clip]
> >> struct v4l2_event {
> >> __u32 count;
> >> __u32 type;
> >> __u32 sequence;
> >> struct timeval timestamp;
> >
> > Can we use 'struct timespec' here. This will force actual
> > implementation to use high-resolution source if possible,
> > and remove hundreds gettimeofday() in user space, which
> > should be used for event synchronization, with more
> > power friendly clock_getres(CLOCK_MONOTONIC).
>
> Good point. I originally picked timeval since it was used in
> v4l2_buffer. The spec tells to use gettimeofday() for system time but
> clock skewing is causes problems in video encoding.
> clock_getres(CLOCK_MONOTONIC) is free of clock skewing and thus should
> be more suitable for this kind of use.
>
> I also propose to use timespec instead of timeval.
>
Hi Sakari,
What is that status of the event API? It is my impression that it is pretty
much finished. Sakari, can you make a final 2.3 RFC? Then Guru can take over
and start the implementation.
Regards,
Hans
--
Hans Verkuil - video4linux developer - sponsored by TANDBERG Telecom
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