Hi Chris,
On Monday 15 October 2012 18:25:32 Chris MacGregor wrote:
On 10/15/2012 12:59 PM, Sakari Ailus wrote:
On Mon, Oct 15, 2012 at 11:53:56AM -0700, Chris MacGregor wrote:
On 10/15/2012 11:45 AM, Laurent Pinchart wrote:
On Monday 15 October 2012 19:05:49 Sakari Ailus wrote:
Hi all,
On Mon October 15 2012 20:45:45 Laurent Pinchart wrote:
Hi Sakari,
On Monday 15 October 2012 19:05:49 Sakari Ailus wrote:
Hi all,
As a summar from the discussion, I think we have reached the following
conclusion. Please say if you agree or disagree with what's below. :-)
- The
Hi all,
As a summar from the discussion, I think we have reached the following
conclusion. Please say if you agree or disagree with what's below. :-)
- The drivers will be moved to use monotonic timestamps for video buffers.
- The user space will learn about the type of the timestamp through
Hi Sakari,
On Monday 15 October 2012 19:05:49 Sakari Ailus wrote:
Hi all,
As a summar from the discussion, I think we have reached the following
conclusion. Please say if you agree or disagree with what's below. :-)
- The drivers will be moved to use monotonic timestamps for video
Hi, all.
On 10/15/2012 11:45 AM, Laurent Pinchart wrote:
Hi Sakari,
On Monday 15 October 2012 19:05:49 Sakari Ailus wrote:
Hi all,
As a summar from the discussion, I think we have reached the following
conclusion. Please say if you agree or disagree with what's below. :-)
- The drivers will
Hi Chris,
On Mon, Oct 15, 2012 at 11:53:56AM -0700, Chris MacGregor wrote:
On 10/15/2012 11:45 AM, Laurent Pinchart wrote:
Hi Sakari,
On Monday 15 October 2012 19:05:49 Sakari Ailus wrote:
Hi all,
As a summar from the discussion, I think we have reached the following
conclusion. Please
Le lundi 15 octobre 2012 22:59:06, Sakari Ailus a écrit :
For the latter the realtime clock fits poorly to begin with: it jumps
around e.g. when the daylight saving time changes.
Wrong. The real time clock is always UTC. It is not subject to time zone
offsets. It only jumps when the clock is
Hi, Sakari.
On 10/15/2012 12:59 PM, Sakari Ailus wrote:
Hi Chris,
On Mon, Oct 15, 2012 at 11:53:56AM -0700, Chris MacGregor wrote:
On 10/15/2012 11:45 AM, Laurent Pinchart wrote:
Hi Sakari,
On Monday 15 October 2012 19:05:49 Sakari Ailus wrote:
Hi all,
As a summar from the discussion, I
Hi Sylwester,
On Thursday 27 September 2012 00:30:49 Sylwester Nawrocki wrote:
On 09/25/2012 02:35 AM, Laurent Pinchart wrote:
Does the clock type need to be selectable for mem-to-mem devices ? Do
device- specific timestamps make sense there ?
I'd like to clarify one thing here, i.e. if
Hi Sakari,
On Wednesday 26 September 2012 22:17:22 Sakari Ailus wrote:
Laurent Pinchart wrote:
On Tuesday 25 September 2012 23:12:00 Sakari Ailus wrote:
Hans Verkuil wrote:
On Tue 25 September 2012 12:48:01 Laurent Pinchart wrote:
On Tuesday 25 September 2012 08:47:45 Hans Verkuil wrote:
Hi Sakari,
On Tuesday 25 September 2012 23:12:00 Sakari Ailus wrote:
Hans Verkuil wrote:
On Tue 25 September 2012 12:48:01 Laurent Pinchart wrote:
On Tuesday 25 September 2012 08:47:45 Hans Verkuil wrote:
On Tue September 25 2012 02:00:55 Laurent Pinchart wrote:
BTW, I think we should
Hi Laurent,
Laurent Pinchart wrote:
On Tuesday 25 September 2012 23:12:00 Sakari Ailus wrote:
Hans Verkuil wrote:
On Tue 25 September 2012 12:48:01 Laurent Pinchart wrote:
On Tuesday 25 September 2012 08:47:45 Hans Verkuil wrote:
On Tue September 25 2012 02:00:55 Laurent Pinchart wrote:
BTW,
Hi Laurent,
On 09/25/2012 02:35 AM, Laurent Pinchart wrote:
Does the clock type need to be selectable for mem-to-mem devices ? Do device-
specific timestamps make sense there ?
I'd like to clarify one thing here, i.e. if we select device-specific
timestamps how should the
On Tue September 25 2012 02:00:55 Laurent Pinchart wrote:
Hi Hans,
On Friday 21 September 2012 11:33:24 Hans Verkuil wrote:
On Thu September 20 2012 22:21:22 Sakari Ailus wrote:
Hi all,
This RFC intends to summarise and further the recent discussion on
linux-media regarding
On Mon September 24 2012 22:11:50 Rémi Denis-Courmont wrote:
Le dimanche 23 septembre 2012 14:43:42, Sakari Ailus a écrit :
I think I like this idea best, it's relatively simple (even with adding
support for reporting flags in VIDIOC_QUERYBUF) for the purpose.
If we ever need the
Hi Hans,
On Tuesday 25 September 2012 08:47:45 Hans Verkuil wrote:
On Tue September 25 2012 02:00:55 Laurent Pinchart wrote:
On Friday 21 September 2012 11:33:24 Hans Verkuil wrote:
On Thu September 20 2012 22:21:22 Sakari Ailus wrote:
Hi all,
This RFC intends to summarise and
On Tue 25 September 2012 12:48:01 Laurent Pinchart wrote:
Hi Hans,
On Tuesday 25 September 2012 08:47:45 Hans Verkuil wrote:
On Tue September 25 2012 02:00:55 Laurent Pinchart wrote:
BTW, I think we should also fix the description of the timestamp in the
spec. Currently it says:
For
Hi Hans,
On Tuesday 25 September 2012 12:54:34 Hans Verkuil wrote:
On Tue 25 September 2012 12:48:01 Laurent Pinchart wrote:
On Tuesday 25 September 2012 08:47:45 Hans Verkuil wrote:
On Tue September 25 2012 02:00:55 Laurent Pinchart wrote:
BTW, I think we should also fix the description
Hi,
Sorry for such a long absence on the mailing list after the Mini summit,
I was out of office. I see that the discussion about timestamps has
already started, so I would like to add some comments. Especially
about mem-to-mem devices.
Subject: Re: [RFC] Timestamps and V4L2
Date: Tue, 25 Sep
Hi Hans and Laurent,
Hans Verkuil wrote:
...
Using v4l2_buffer flags to report the clock
---
By defining flags like this:
V4L2_BUF_FLAG_CLOCK_MASK0x7000
/* Possible Clocks */
V4L2_BUF_FLAG_CLOCK_UNKNOWN 0x /* system or monotonic, we don't
Hi Hans,
Hans Verkuil wrote:
On Tue 25 September 2012 12:48:01 Laurent Pinchart wrote:
Hi Hans,
On Tuesday 25 September 2012 08:47:45 Hans Verkuil wrote:
On Tue September 25 2012 02:00:55 Laurent Pinchart wrote:
BTW, I think we should also fix the description of the timestamp in the
spec.
Hi Laurent,
On 09/25/2012 02:34 AM, Laurent Pinchart wrote:
On Saturday 22 September 2012 19:12:52 Sylwester Nawrocki wrote:
On 09/22/2012 02:38 PM, Sakari Ailus wrote:
You are missing one other option:
Using v4l2_buffer flags to report the clock
---
On Sun September 23 2012 15:07:24 Sakari Ailus wrote:
Hi Hans,
Hans Verkuil wrote:
On Sat September 22 2012 14:38:07 Sakari Ailus wrote:
Hi Hans,
Thanks for the comments.
Hans Verkuil wrote:
On Thu September 20 2012 22:21:22 Sakari Ailus wrote:
...
Capability flag for
Le dimanche 23 septembre 2012 14:43:42, Sakari Ailus a écrit :
I think I like this idea best, it's relatively simple (even with adding
support for reporting flags in VIDIOC_QUERYBUF) for the purpose.
If we ever need the clock selection API I would vote for an IOCTL.
The controls API is
On Friday 21 September 2012 11:33:24 Hans Verkuil wrote:
On Thu September 20 2012 22:21:22 Sakari Ailus wrote:
Hi all,
This RFC intends to summarise and further the recent discussion on
linux-media regarding the proposed changes of timestamping V4L2 buffers.
The problem
Hi Hans,
On Friday 21 September 2012 11:33:24 Hans Verkuil wrote:
On Thu September 20 2012 22:21:22 Sakari Ailus wrote:
Hi all,
This RFC intends to summarise and further the recent discussion on
linux-media regarding the proposed changes of timestamping V4L2 buffers.
The
Hi Hans,
On Sunday 23 September 2012 11:18:45 Hans Verkuil wrote:
On Sat September 22 2012 14:38:07 Sakari Ailus wrote:
Hans Verkuil wrote:
On Thu September 20 2012 22:21:22 Sakari Ailus wrote:
Hi all,
This RFC intends to summarise and further the recent discussion on
Hi Sylwester,
On Saturday 22 September 2012 19:12:52 Sylwester Nawrocki wrote:
On 09/22/2012 02:38 PM, Sakari Ailus wrote:
You are missing one other option:
Using v4l2_buffer flags to report the clock
---
By defining flags like this:
Hi Sylwester,
On Sunday 23 September 2012 20:40:36 Sylwester Nawrocki wrote:
On 09/22/2012 10:28 PM, Daniel Glöckner wrote:
On Sat, Sep 22, 2012 at 07:12:52PM +0200, Sylwester Nawrocki wrote:
If we ever need the clock selection API I would vote for an IOCTL.
The controls API is a bad
On Sat September 22 2012 14:38:07 Sakari Ailus wrote:
Hi Hans,
Thanks for the comments.
Hans Verkuil wrote:
On Thu September 20 2012 22:21:22 Sakari Ailus wrote:
Hi all,
This RFC intends to summarise and further the recent discussion on
linux-media regarding the proposed changes
Hi Sylwester,
On Sat, Sep 22, 2012 at 07:12:52PM +0200, Sylwester Nawrocki wrote:
On 09/22/2012 02:38 PM, Sakari Ailus wrote:
You are missing one other option:
Using v4l2_buffer flags to report the clock
---
By defining flags like this:
Hi Hans,
Hans Verkuil wrote:
On Sat September 22 2012 14:38:07 Sakari Ailus wrote:
Hi Hans,
Thanks for the comments.
Hans Verkuil wrote:
On Thu September 20 2012 22:21:22 Sakari Ailus wrote:
...
Capability flag for monotonic timestamps
A
On 09/22/2012 10:28 PM, Daniel Glöckner wrote:
On Sat, Sep 22, 2012 at 07:12:52PM +0200, Sylwester Nawrocki wrote:
If we ever need the clock selection API I would vote for an IOCTL.
The controls API is a bad choice for something such fundamental as
type of clock for buffer timestamping IMHO.
Hi Hans,
Thanks for the comments.
Hans Verkuil wrote:
On Thu September 20 2012 22:21:22 Sakari Ailus wrote:
Hi all,
This RFC intends to summarise and further the recent discussion on
linux-media regarding the proposed changes of timestamping V4L2 buffers.
The problem
===
The V4L2
On 09/22/2012 02:38 PM, Sakari Ailus wrote:
You are missing one other option:
Using v4l2_buffer flags to report the clock
---
By defining flags like this:
V4L2_BUF_FLAG_CLOCK_MASK 0x7000
/* Possible Clocks */
V4L2_BUF_FLAG_CLOCK_UNKNOWN 0x /*
On Sat, Sep 22, 2012 at 07:12:52PM +0200, Sylwester Nawrocki wrote:
If we ever need the clock selection API I would vote for an IOCTL.
The controls API is a bad choice for something such fundamental as
type of clock for buffer timestamping IMHO. Let's stop making the
controls API a dumping
2012/9/20 Sakari Ailus sakari.ai...@iki.fi:
Hi all,
This RFC intends to summarise and further the recent discussion on
linux-media regarding the proposed changes of timestamping V4L2 buffers.
The problem
===
The V4L2 has long used realtime timestamps (such as
On Thu September 20 2012 22:21:22 Sakari Ailus wrote:
Hi all,
This RFC intends to summarise and further the recent discussion on
linux-media regarding the proposed changes of timestamping V4L2 buffers.
The problem
===
The V4L2 has long used realtime timestamps (such as
Hi all,
This RFC intends to summarise and further the recent discussion on
linux-media regarding the proposed changes of timestamping V4L2 buffers.
The problem
===
The V4L2 has long used realtime timestamps (such as
clock_gettime(CLOCK_REALTIME, ...)) to stamp the video buffers before
Le jeudi 20 septembre 2012 23:21:22, Sakari Ailus a écrit :
The problem
===
The V4L2 has long used realtime timestamps (such as
clock_gettime(CLOCK_REALTIME, ...)) to stamp the video buffers before
handing them over to the user. This has been found problematic in
associating the
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