V4L2 'brainstorming' meeting in Warsaw, March 2011

V4L2 'brainstorming' meeting in Warsaw, March 2011

[Marek Szyprowski]

Hello everyone!

The idea of v4l2 'brainstorming' session came out after a few discussions on #v4l
IRC channel about various RFCs and proposals that have been posted recently. I
would like to announce that Samsung Poland R&D Center (SPRC) agreed to take an
opportunity to organize this meeting. I've got a reservation for a conference
room for 16-18 March 2011 in our office.

I would like to invite all of You for this V4L2 'brainstorming' session.

I hope that this initial meeting date I've selected will fit us. We have 2 only
weeks for the preparation, but I hope we will manage. I'm open for another date
and if required I will change the reservation.

The meeting will last 3 days what gives us a lot of possibility to present the
issues and proposals, discuss them further and work out a solution that will be
accepted by others.

From SPRC 4 developers will attend this meeting: Sylwester Nawrocki (s5p-fimc
author), Kamil Debski (s5p-mfc author), Tomasz Stanislawski (s5p-tv author) and me
(videobuf2 co-author and kernel lead developer in SPRC).

A quick summary of the above:

1. Type of the meeting:
        V4L2 'brainstorming' mini-summit :)

2. Place:
        Samsung Poland R&D Center
        Polna 11 Street
        00-633 Warsaw, Poland

3. Date:
        16-18 March 2011

4. Agenda
        TBD, everyone is welcomed to put his items here :)

I will post some travel information tomorrow. SPRC office is in the center of Warsaw,
there are a few hotels nearby. I will check for a free rooms and I will make a
recommendation soon. I hope we will meet together soon!

Best regards
--
Marek Szyprowski
Samsung Poland R&D Center



The above message is intended solely for the named addressee and may contain trade secret, industrial technology or privileged and confidential information otherwise protected under applicable law. Any unauthorized dissemination, distribution, copying or use of the information contained in this communication is strictly prohibited. If you have received this communication in error, please notify sender by email and delete this communication immediately.


Powyższa wiadomość przeznaczona jest wyłącznie dla adresata niniejszej wiadomości i może zawierać informacje będące tajemnicą handlową, tajemnicą przedsiębiorstwa oraz informacje o charakterze poufnym chronione obowiązującymi przepisami prawa. Jakiekolwiek nieuprawnione ich rozpowszechnianie, dystrybucja, kopiowanie lub użycie informacji zawartych w powyższej wiadomości jest zabronione. Jeśli otrzymałeś powyższą wiadomość omyłkowo, uprzejmie proszę poinformuj o tym fakcie drogą mailową nadawcę tej wiadomości oraz niezwłocznie usuń powyższą wiadomość ze swojego komputera.

V4L2 'brainstorming' meeting in Warsaw, March 2011

[Marek Szyprowski]

Hello everyone!

The idea of v4l2 'brainstorming' session came out after a few discussions on #v4l
IRC channel about various RFCs and proposals that have been posted recently. I
would like to announce that Samsung Poland R&D Center (SPRC) agreed to take an
opportunity to organize this meeting. I've got a reservation for a conference
room for 16-18 March 2011 in our office.

I would like to invite all of You for this V4L2 'brainstorming' session.

I hope that this initial meeting date I've selected will fit us. We have 2 only
weeks for the preparation, but I hope we will manage. I'm open for another date
and if required I will change the reservation.

The meeting will last 3 days what gives us a lot of possibility to present the
issues and proposals, discuss them further and work out a solution that will be
accepted by others.

From SPRC 4 developers will attend this meeting: Sylwester Nawrocki (s5p-fimc
author), Kamil Debski (s5p-mfc author), Tomasz Stanislawski (s5p-tv author) and me
(videobuf2 co-author and kernel lead developer in SPRC).

A quick summary of the above:

1. Type of the meeting:
        V4L2 'brainstorming' mini-summit :)

2. Place:
        Samsung Poland R&D Center
        Polna 11 Street
        00-633 Warsaw, Poland

3. Date:
        16-18 March 2011

4. Agenda
        TBD, everyone is welcomed to put his items here :)

I will post some travel information tomorrow. SPRC office is in the center of Warsaw,
there are a few hotels nearby. I will check for a free rooms and I will make a
recommendation soon. I hope we will meet together soon!

Best regards
--
Marek Szyprowski
Samsung Poland R&D Center

The above message is intended solely for the named addressee and may contain trade secret, industrial technology or privileged and confidential information otherwise protected under applicable law. Any unauthorized dissemination, distribution, copying or use of the information contained in this communication is strictly prohibited. If you have received this communication in error, please notify sender by email and delete this communication immediately.


Powyższa wiadomość przeznaczona jest wyłącznie dla adresata niniejszej wiadomości i może zawierać informacje będące tajemnicą handlową, tajemnicą przedsiębiorstwa oraz informacje o charakterze poufnym chronione obowiązującymi przepisami prawa. Jakiekolwiek nieuprawnione ich rozpowszechnianie, dystrybucja, kopiowanie lub użycie informacji zawartych w powyższej wiadomości jest zabronione. Jeśli otrzymałeś powyższą wiadomość omyłkowo, uprzejmie proszę poinformuj o tym fakcie drogą mailową nadawcę tej wiadomości oraz niezwłocznie usuń powyższą wiadomość ze swojego komputera.

Re: V4L2 'brainstorming' meeting in Warsaw, March 2011

[Hans Verkuil]

On Monday, February 28, 2011 18:11:47 Marek Szyprowski wrote:
> Hello everyone!
> 
> The idea of v4l2 'brainstorming' session came out after a few discussions on #v4l
> IRC channel about various RFCs and proposals that have been posted recently. I
> would like to announce that Samsung Poland R&D Center (SPRC) agreed to take an
> opportunity to organize this meeting. I've got a reservation for a conference
> room for 16-18 March 2011 in our office.
> 
> I would like to invite all of You for this V4L2 'brainstorming' session.
> 
> I hope that this initial meeting date I've selected will fit us. We have 2 only
> weeks for the preparation, but I hope we will manage. I'm open for another date
> and if required I will change the reservation.
> 
> The meeting will last 3 days what gives us a lot of possibility to present the
> issues and proposals, discuss them further and work out a solution that will be
> accepted by others.
> 
> From SPRC 4 developers will attend this meeting: Sylwester Nawrocki (s5p-fimc
> author), Kamil Debski (s5p-mfc author), Tomasz Stanislawski (s5p-tv author) and me
> (videobuf2 co-author and kernel lead developer in SPRC).
> 
> A quick summary of the above:
> 
> 1. Type of the meeting:
>         V4L2 'brainstorming' mini-summit :)
> 
> 2. Place:
>         Samsung Poland R&D Center
>         Polna 11 Street
>         00-633 Warsaw, Poland
> 
> 3. Date:
>         16-18 March 2011
> 
> 4. Agenda
>         TBD, everyone is welcomed to put his items here :)

In no particular order:

1) pipeline configuration, cropping and scaling:

http://www.mail-archive.com/linux-media@vger.kernel.org/msg27956.html
http://www.mail-archive.com/linux-media@vger.kernel.org/msg26630.html

2) HDMI API support

Some hotplug/CEC code can be found here:

http://www.mail-archive.com/linux-media@vger.kernel.org/msg28549.html

but Cisco will soon post RFCs on this topic as well.

3) Snapshot functionality.

http://www.mail-archive.com/linux-media@vger.kernel.org/msg28192.html
http://www.mail-archive.com/linux-media@vger.kernel.org/msg28490.html

If we finish quicker than expected, then we can also look at this:

- use of V4L2 as a frontend for SW/DSP codecs

Regards,

	Hans

-- 
Hans Verkuil - video4linux developer - sponsored by Cisco

Re: V4L2 'brainstorming' meeting in Warsaw, March 2011

[Laurent Pinchart]

On Monday 28 February 2011 19:03:39 Hans Verkuil wrote:
> On Monday, February 28, 2011 18:11:47 Marek Szyprowski wrote:

[snip]

> > 4. Agenda
> > 
> >         TBD, everyone is welcomed to put his items here :)
> 
> In no particular order:
> 
> 1) pipeline configuration, cropping and scaling:
> 
> http://www.mail-archive.com/linux-media@vger.kernel.org/msg27956.html
> http://www.mail-archive.com/linux-media@vger.kernel.org/msg26630.html
> 
> 2) HDMI API support
> 
> Some hotplug/CEC code can be found here:
> 
> http://www.mail-archive.com/linux-media@vger.kernel.org/msg28549.html
> 
> but Cisco will soon post RFCs on this topic as well.
> 
> 3) Snapshot functionality.
> 
> http://www.mail-archive.com/linux-media@vger.kernel.org/msg28192.html
> http://www.mail-archive.com/linux-media@vger.kernel.org/msg28490.html
> 
> If we finish quicker than expected, then we can also look at this:
> 
> - use of V4L2 as a frontend for SW/DSP codecs

In still no particular order:

 - Muxed formats (H.264 inside MJPEG)
 - H.264
 - Buffers pool
 - Entity information ioctl
 - Userspace drivers (OMX)
 - Sensor blanking/pixel-clock/frame-rate settings (including 
enumeration/discovery)
 - GL/ES in V4L2 devices

-- 
Regards,

Laurent Pinchart

Re: V4L2 'brainstorming' meeting in Warsaw, March 2011

[Sakari Ailus]

Laurent Pinchart wrote:
> On Monday 28 February 2011 19:03:39 Hans Verkuil wrote:
>> On Monday, February 28, 2011 18:11:47 Marek Szyprowski wrote:
> 
> [snip]
> 
>>> 4. Agenda
>>>
>>>         TBD, everyone is welcomed to put his items here :)
>>
>> In no particular order:
>>
>> 1) pipeline configuration, cropping and scaling:
>>
>> http://www.mail-archive.com/linux-media@vger.kernel.org/msg27956.html
>> http://www.mail-archive.com/linux-media@vger.kernel.org/msg26630.html
>>
>> 2) HDMI API support
>>
>> Some hotplug/CEC code can be found here:
>>
>> http://www.mail-archive.com/linux-media@vger.kernel.org/msg28549.html
>>
>> but Cisco will soon post RFCs on this topic as well.
>>
>> 3) Snapshot functionality.
>>
>> http://www.mail-archive.com/linux-media@vger.kernel.org/msg28192.html
>> http://www.mail-archive.com/linux-media@vger.kernel.org/msg28490.html
>>
>> If we finish quicker than expected, then we can also look at this:
>>
>> - use of V4L2 as a frontend for SW/DSP codecs
> 
> In still no particular order:
> 
>  - Muxed formats (H.264 inside MJPEG)
>  - H.264
>  - Buffers pool
>  - Entity information ioctl
>  - Userspace drivers (OMX)
>  - Sensor blanking/pixel-clock/frame-rate settings (including 
> enumeration/discovery)
>  - GL/ES in V4L2 devices

Unordered, again:

- Multiple video buffer queues per device (currently implemented in the
OMAP 3 ISP driver in non-standard way).

- Synchronising parameters (e.g. exposure time and gain) on given
frames. Some sensors support this on hardware. There are many use cases
which benefit from this, for example this one:

<URL:http://fcam.garage.maemo.org/>

- Flash synchronisation (might fall under the above topic).

- Frame metadata. It is important for the control algorithms (exposure,
white balance, for example), to know which sensor settings have been
used to expose a given frame. Many sensors do support this. Do we want
to parse this in the kernel or does it belong to user space? The
metadata formats are mostly sensor dependent.


The dates are okay for me but I'm not yet certain of my participation
for other reasons.


Best regards,

-- 
Sakari Ailus
sakari.ailus@maxwell.research.nokia.com

Re: V4L2 'brainstorming' meeting in Warsaw, March 2011

[Tomasz Stanislawski]

Sakari Ailus wrote:
> Laurent Pinchart wrote:
>> On Monday 28 February 2011 19:03:39 Hans Verkuil wrote:
>>> On Monday, February 28, 2011 18:11:47 Marek Szyprowski wrote:
>> [snip]
>>
>>>> 4. Agenda
>>>>
>>>>         TBD, everyone is welcomed to put his items here :)
>>> In no particular order:
>>>
>>> 1) pipeline configuration, cropping and scaling:
>>>
>>> http://www.mail-archive.com/linux-media@vger.kernel.org/msg27956.html
>>> http://www.mail-archive.com/linux-media@vger.kernel.org/msg26630.html
>>>
>>> 2) HDMI API support
>>>
>>> Some hotplug/CEC code can be found here:
>>>
>>> http://www.mail-archive.com/linux-media@vger.kernel.org/msg28549.html
>>>
>>> but Cisco will soon post RFCs on this topic as well.
>>>
>>> 3) Snapshot functionality.
>>>
>>> http://www.mail-archive.com/linux-media@vger.kernel.org/msg28192.html
>>> http://www.mail-archive.com/linux-media@vger.kernel.org/msg28490.html
>>>
>>> If we finish quicker than expected, then we can also look at this:
>>>
>>> - use of V4L2 as a frontend for SW/DSP codecs
>> In still no particular order:
>>
>>  - Muxed formats (H.264 inside MJPEG)
>>  - H.264
>>  - Buffers pool
>>  - Entity information ioctl
>>  - Userspace drivers (OMX)
>>  - Sensor blanking/pixel-clock/frame-rate settings (including 
>> enumeration/discovery)
>>  - GL/ES in V4L2 devices
> 
> Unordered, again:
> 
> - Multiple video buffer queues per device (currently implemented in the
> OMAP 3 ISP driver in non-standard way).
> 
> - Synchronising parameters (e.g. exposure time and gain) on given
> frames. Some sensors support this on hardware. There are many use cases
> which benefit from this, for example this one:
> 
> <URL:http://fcam.garage.maemo.org/>
> 
> - Flash synchronisation (might fall under the above topic).
> 
> - Frame metadata. It is important for the control algorithms (exposure,
> white balance, for example), to know which sensor settings have been
> used to expose a given frame. Many sensors do support this. Do we want
> to parse this in the kernel or does it belong to user space? The
> metadata formats are mostly sensor dependent.
> 
> 
> The dates are okay for me but I'm not yet certain of my participation
> for other reasons.
> 
> 
> Best regards,
> 

I propose few topic:

1. Acquiring subdevs from other devices using subdev pool
http://www.mail-archive.com/linux-media@vger.kernel.org/msg21831.html

2. Buffer cropping.
http://www.mail-archive.com/linux-media@vger.kernel.org/msg27956.html

3. Introducing subdev hierarchy. Below there is a link to driver using it:
http://thread.gmane.org/gmane.linux.drivers.video-input-infrastructure/28885/focus=28890

Best regards
Tomasz Stanislawski

Re: V4L2 'brainstorming' meeting in Warsaw, March 2011

[Hans Verkuil]

Hi all!

On Monday, February 28, 2011 18:11:47 Marek Szyprowski wrote:
> Hello everyone!
> 
> The idea of v4l2 'brainstorming' session came out after a few discussions on 
#v4l
> IRC channel about various RFCs and proposals that have been posted recently. 
I
> would like to announce that Samsung Poland R&D Center (SPRC) agreed to take 
an
> opportunity to organize this meeting. I've got a reservation for a 
conference
> room for 16-18 March 2011 in our office.
> 
> I would like to invite all of You for this V4L2 'brainstorming' session.
> 
> I hope that this initial meeting date I've selected will fit us. We have 2 
only
> weeks for the preparation, but I hope we will manage. I'm open for another 
date
> and if required I will change the reservation.
> 
> The meeting will last 3 days what gives us a lot of possibility to present 
the
> issues and proposals, discuss them further and work out a solution that will 
be
> accepted by others.
> 
> From SPRC 4 developers will attend this meeting: Sylwester Nawrocki (s5p-
fimc
> author), Kamil Debski (s5p-mfc author), Tomasz Stanislawski (s5p-tv author) 
and me
> (videobuf2 co-author and kernel lead developer in SPRC).
> 
> A quick summary of the above:
> 
> 1. Type of the meeting:
>         V4L2 'brainstorming' mini-summit :)
> 
> 2. Place:
>         Samsung Poland R&D Center
>         Polna 11 Street
>         00-633 Warsaw, Poland
> 
> 3. Date:
>         16-18 March 2011
> 
> 4. Agenda
>         TBD, everyone is welcomed to put his items here :)
> 
> I will post some travel information tomorrow. SPRC office is in the center 
of Warsaw,
> there are a few hotels nearby. I will check for a free rooms and I will make 
a
> recommendation soon. I hope we will meet together soon!

Just to let you all know that I will be handling the agenda. I'll prepare a 
first version of it this weekend and the final one next weekend.

The basic outline is the same as during previous meetings: the first day we go 
through all the agenda points and make sure everyone understands the problem. 
Smaller issues will be discussed and decided, more complex issues are just 
discussed.

The second day we go in depth into the complex issues and try to come up with 
ideas that might work. The last day we translate the all agenda items into 
actions.

This approach worked well in the past and it ensures that we end up with 
something concrete. Also note that this is a brainstorm meeting, so the final 
decisions will have to be taken on the mailinglist.

Those who have a vested interest in an agenda item should be prepared to 
explain it and if necessary have a presentation ready.

There is a lot of ground to cover, so we should try to avoid wasting too much 
time :-)

Regards,

	Hans

RE: V4L2 'brainstorming' meeting in Warsaw, March 2011

[Marek Szyprowski]

Hello again!

As I promised I've prepared some additional travel information.

I would like to recommend Polonia Palace Hotel. It is located in the center of Warsaw,
quite near Samsung office. I've checked and they have free rooms for the 13-20 period
(I've assumed 3 days of 'brainstorming' and weekend for sightseeing). You can book
rooms online on their webpage: http://www.poloniapalace.com/

Getting to Warsaw should be quite easy. I assume that everyone will come by plane.
There is only one airport in the Warsaw (Warsaw Chopin Airport - 'WAW' airport code)
which is located about 10km from the city center. The easiest way to the city center
is to take taxi. It should cost about 40-50 PLN (10-12 euro).

To get to the Samsung Office you can make a 10-15 minutes' walk or take a subway (it is
only 1 stop from 'Metro Centrum' station to 'Metro Politechnika' station).

I've prepared a map with Samsung Office, Hotel Polonia and Airport: 
http://tinyurl.com/4tubbyu

If you decide to stay a bit longer in Warsaw, I recommend to check sightseeing
information from the Palace Hotel: http://www.poloniapalace.com/discover-warsaw-en.html
>From the city center it is quite near to most sightseeing attractions (like Old Town,
Palace of Culture and Science, Nowy Swiat street).

Best regards
--
Marek Szyprowski
Samsung Poland R&D Center

RE: V4L2 'brainstorming' meeting in Warsaw, March 2011

[Marek Szyprowski]

Hello once more,

After some discussion on #v4l irc channel, I would like to inform that the meeting
date has been fixed to my initial proposition: 3 days from 16 to 18 March 2011.

Best regards
--
Marek Szyprowski
Samsung Poland R&D Center

Re: V4L2 'brainstorming' meeting in Warsaw, March 2011

[Robert Fekete]

 Hi,

 I would gladly join this meeting but unfortunately I cannot attend. On the
 other hand I am glad to present that Willy Poisson from ST-Ericsson can
 join. Willy will mainly focus on Camera/imaging parts in which we believe
 V4L2 may fit very well.


 Some comments:

 Regarding OGL/ES in V4L2 I do not quite get the connection. As long as there
 is a common system memory handle...like hwmem any buffer dequeued from a
 camera or video decoder automatically slips into GLES...right. Of course the
 GL hw driver must also be aware of hwmem and accept the bufferformat used.

 Regarding HDMI API: We have some thoughts here as well...I'll get back to
 you.

 Regarding Buffer Pool: As you already know hwmem is one proposal but we are
 moving more towards GEM(since it's there already) with hwmem style though
 with CMA at the bottom....I'll get back to you on this matter as well.

 Have a nice meeting in Warsaw!

 BR
 /Robert Fekete
 (robert.fekete@stericsson.com)


> On 1 March 2011 16:26, Marek Szyprowski <m.szyprowski@samsung.com> wrote:
>>
>> Hello once more,
>>
>> After some discussion on #v4l irc channel, I would like to inform that the
>> meeting
>> date has been fixed to my initial proposition: 3 days from 16 to 18 March
>> 2011.
>>
>> Best regards
>> --
>> Marek Szyprowski
>> Samsung Poland R&D Center
>>
>>
>> --
>> To unsubscribe from this list: send the line "unsubscribe linux-media" in
>> the body of a message to majordomo@vger.kernel.org
>> More majordomo info at  http://vger.kernel.org/majordomo-info.html
>
>

RE: V4L2 'brainstorming' meeting in Warsaw, March 2011

[Jaeryul Oh]

Hi, Marek

Jonghun Han & I will participate in that meeting.
We are preparing for some topic that we want to talk with participants.
I'll let you know about the agenda soon.

> -----Original Message-----
> From: linux-media-owner@vger.kernel.org [mailto:linux-media-
> owner@vger.kernel.org] On Behalf Of Marek Szyprowski
> Sent: Wednesday, March 02, 2011 12:27 AM
> To: Marek Szyprowski; linux-media@vger.kernel.org
> Subject: RE: V4L2 'brainstorming' meeting in Warsaw, March 2011
> 
> Hello once more,
> 
> After some discussion on #v4l irc channel, I would like to inform that the
> meeting
> date has been fixed to my initial proposition: 3 days from 16 to 18 March
> 2011.
> 
> Best regards
> --
> Marek Szyprowski
> Samsung Poland R&D Center
> 
> 
> --
> To unsubscribe from this list: send the line "unsubscribe linux-media" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html

Re: V4L2 'brainstorming' meeting in Warsaw, March 2011

[Hans Verkuil]

On Monday, February 28, 2011 19:12:00 Laurent Pinchart wrote:
> On Monday 28 February 2011 19:03:39 Hans Verkuil wrote:
> > On Monday, February 28, 2011 18:11:47 Marek Szyprowski wrote:
> 
> [snip]
> 
> > > 4. Agenda
> > > 
> > >         TBD, everyone is welcomed to put his items here :)
> > 
> > In no particular order:
> > 
> > 1) pipeline configuration, cropping and scaling:
> > 
> > http://www.mail-archive.com/linux-media@vger.kernel.org/msg27956.html
> > http://www.mail-archive.com/linux-media@vger.kernel.org/msg26630.html
> > 
> > 2) HDMI API support
> > 
> > Some hotplug/CEC code can be found here:
> > 
> > http://www.mail-archive.com/linux-media@vger.kernel.org/msg28549.html
> > 
> > but Cisco will soon post RFCs on this topic as well.
> > 
> > 3) Snapshot functionality.
> > 
> > http://www.mail-archive.com/linux-media@vger.kernel.org/msg28192.html
> > http://www.mail-archive.com/linux-media@vger.kernel.org/msg28490.html
> > 
> > If we finish quicker than expected, then we can also look at this:
> > 
> > - use of V4L2 as a frontend for SW/DSP codecs
> 
> In still no particular order:
> 
>  - Muxed formats (H.264 inside MJPEG)
>  - H.264
>  - Buffers pool
>  - Entity information ioctl

Can you elaborate on this one?

>  - Userspace drivers (OMX)

And this one?

>  - Sensor blanking/pixel-clock/frame-rate settings (including 
> enumeration/discovery)
>  - GL/ES in V4L2 devices

And this one?

I need a bit more information for the agenda.

Thanks!

	Hans

> 
> 

-- 
Hans Verkuil - video4linux developer - sponsored by Cisco

Re: V4L2 'brainstorming' meeting in Warsaw, March 2011

[Laurent Pinchart]

Hi Hans,

On Saturday 05 March 2011 17:02:13 Hans Verkuil wrote:
> On Monday, February 28, 2011 19:12:00 Laurent Pinchart wrote:
> > On Monday 28 February 2011 19:03:39 Hans Verkuil wrote:
> > > On Monday, February 28, 2011 18:11:47 Marek Szyprowski wrote:
> > [snip]
> > 
> > > > 4. Agenda
> > > > 
> > > >         TBD, everyone is welcomed to put his items here :)
> > > 
> > > In no particular order:
> > > 
> > > 1) pipeline configuration, cropping and scaling:
> > > 
> > > http://www.mail-archive.com/linux-media@vger.kernel.org/msg27956.html
> > > http://www.mail-archive.com/linux-media@vger.kernel.org/msg26630.html
> > > 
> > > 2) HDMI API support
> > > 
> > > Some hotplug/CEC code can be found here:
> > > 
> > > http://www.mail-archive.com/linux-media@vger.kernel.org/msg28549.html
> > > 
> > > but Cisco will soon post RFCs on this topic as well.
> > > 
> > > 3) Snapshot functionality.
> > > 
> > > http://www.mail-archive.com/linux-media@vger.kernel.org/msg28192.html
> > > http://www.mail-archive.com/linux-media@vger.kernel.org/msg28490.html
> > > 
> > > If we finish quicker than expected, then we can also look at this:
> > > 
> > > - use of V4L2 as a frontend for SW/DSP codecs
> > 
> > In still no particular order:
> >  - Muxed formats (H.264 inside MJPEG)
> >  - H.264
> >  - Buffers pool
> >  - Entity information ioctl
> 
> Can you elaborate on this one?

Some drivers (namely the uvcvideo driver) will need to report driver-specific 
information about each entity (the UVC entity GUID, the UVC controls it 
supports, ...). We need an API for that.

> >  - Userspace drivers (OMX)
> 
> And this one?

This is a follow-up of the "v4l2 vs omx for camera" discussion. I'd like to 
discuss whether we need an API for userspace drivers, like OMX has.

> >  - Sensor blanking/pixel-clock/frame-rate settings (including
> > 
> > enumeration/discovery)
> > 
> >  - GL/ES in V4L2 devices
> 
> And this one?

Devices are becoming hybrid. GPUs are supported through DRM and OpenGL 
(OpenGL/ES is embedded devices), and video output with V4L2. What about a 
video output device with OpenGL/ES capabilities ? We'll need to think about it 
at some point.

-- 
Regards,

Laurent Pinchart

RE: V4L2 'brainstorming' meeting in Warsaw, March 2011

[Marek Szyprowski]

Hello once again,

I will come to Polonia Palace Hotel on Wednesday morning. I propose
to meet near the reception desk at 8:45 AM and then we will come together to
the SPRC Office. If one decided to stay in a different hotel, he can also
join us near the SPRC Office building at 9:00 AM.

In case of any problems or questions, please don't hesitate to call me
directly. Here is my phone numer: +48604072390

Just to remind - here is a map with SPRC Office building and Hotel Polonia
Palace: 
http://tinyurl.com/4tubbyu

Best regards
--
Marek Szyprowski
Samsung Poland R&D Center

RE: V4L2 'brainstorming' meeting in Warsaw, March 2011

[Marek Szyprowski]

Hello once again,

I will come to Polonia Palace Hotel on Wednesday morning. I propose
to meet near the reception desk at 8:45 AM and then we will come together to
the SPRC Office. If one decided to stay in a different hotel, he can also
join us near the SPRC Office building at 9:00 AM.

In case of any problems or questions, please don't hesitate to call me
directly. Here is my phone numer: +48604072390

Just to remind - here is a map with SPRC Office building and Hotel Polonia
Palace: 
http://tinyurl.com/4tubbyu

Best regards
--
Marek Szyprowski
Samsung Poland R&D Center

RE: V4L2 'brainstorming' meeting in Warsaw, March 2011

[Marek Szyprowski]

Hello,

On Tuesday, March 08, 2011 2:54 PM Palmax Maverick wrote:

> Will you record it? Or will you stream it? Out will you do both things?
> It could be interesting for all users of this mail group :)

I'm really sorry, but we have no possibility to stream the meeting. We will
definitely post a detailed report from the session and the conclusions will
be discussed also on mailing list.

Best regards
--
Marek Szyprowski
Samsung Poland R&D Center