[PATCH/RFC,1/1] Add a libv4l plugin for Exynos4 camera

  On Wed, 08 Oct 2014 15:22:43 +0200
Jacek Anaszewski <j.anaszewski@samsung.com> wrote:

> Hi Hans,
> 
> On 10/08/2014 02:42 PM, Hans de Goede wrote:
> > Hi,
> >
> > On 10/08/2014 10:46 AM, Jacek Anaszewski wrote:
> >> The plugin provides support for the media device on Exynos4 SoC.
> >> Added is also a media device configuration file parser.
> >> The media configuration file is used for conveying information
> >> about media device links that need to be established as well
> >> as V4L2 user control ioctls redirection to a particular
> >> sub-device.
> >>
> >> The plugin performs single plane <-> multi plane API conversion,
> >> video pipeline linking and takes care of automatic data format
> >> negotiation for the whole pipeline, after intercepting
> >> VIDIOC_S_FMT or VIDIOC_TRY_FMT ioctls.
> >>
> >> Signed-off-by: Jacek Anaszewski <j.anaszewski@samsung.com>
> >> Acked-by: Kyungmin Park <kyungmin.park@samsung.com>
> >> Cc: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
> >> Cc: Hans Verkuil <hans.verkuil@cisco.com>
> >> ---
> >>   configure.ac                                       |    1 +
> >>   lib/Makefile.am                                    |    5 +-
> >>   lib/libv4l-exynos4-camera/Makefile.am              |    7 +
> >>   .../libv4l-devconfig-parser.h                      |  145 ++
> >>   lib/libv4l-exynos4-camera/libv4l-exynos4-camera.c  | 2486 ++++++++++++++++++++
> >>   5 files changed, 2642 insertions(+), 2 deletions(-)
> >>   create mode 100644 lib/libv4l-exynos4-camera/Makefile.am
> >>   create mode 100644 lib/libv4l-exynos4-camera/libv4l-devconfig-parser.h
> >>   create mode 100644 lib/libv4l-exynos4-camera/libv4l-exynos4-camera.c
> >
> > Ugh, that is a big plugin. Can you please split out the parser stuff
> > into a separate file ?
> 
> Yes, I tried to split it, but spent so much time fighting with
> autotools, that I decided to submit it in this form and ask
> more experienced v4l-utils build system maintainers for the advice.
> I mentioned this in the cover letter.
> 

What autotools issue in particular?
The following change followed by "automake && ./configure" should be
enough to add a new file libv4l-devconfig-parser.c:



If you wanted to completely reset the build environment you could
even use "git clean", FWIW I have this "git distclean" alias in
~/.gitconfig:

[alias]
	distclean = clean -f -d -X

You'll need to rerun "autoreconf -i" after such a cleanup.

Ciao,
   Antonio
  

On 10/08/2014 05:49 PM, Antonio Ospite wrote:
> On Wed, 08 Oct 2014 15:22:43 +0200
> Jacek Anaszewski <j.anaszewski@samsung.com> wrote:
>
>> Hi Hans,
>>
>> On 10/08/2014 02:42 PM, Hans de Goede wrote:
>>> Hi,
>>>
>>> On 10/08/2014 10:46 AM, Jacek Anaszewski wrote:
>>>> The plugin provides support for the media device on Exynos4 SoC.
>>>> Added is also a media device configuration file parser.
>>>> The media configuration file is used for conveying information
>>>> about media device links that need to be established as well
>>>> as V4L2 user control ioctls redirection to a particular
>>>> sub-device.
>>>>
>>>> The plugin performs single plane <-> multi plane API conversion,
>>>> video pipeline linking and takes care of automatic data format
>>>> negotiation for the whole pipeline, after intercepting
>>>> VIDIOC_S_FMT or VIDIOC_TRY_FMT ioctls.
>>>>
>>>> Signed-off-by: Jacek Anaszewski <j.anaszewski@samsung.com>
>>>> Acked-by: Kyungmin Park <kyungmin.park@samsung.com>
>>>> Cc: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
>>>> Cc: Hans Verkuil <hans.verkuil@cisco.com>
>>>> ---
>>>>    configure.ac                                       |    1 +
>>>>    lib/Makefile.am                                    |    5 +-
>>>>    lib/libv4l-exynos4-camera/Makefile.am              |    7 +
>>>>    .../libv4l-devconfig-parser.h                      |  145 ++
>>>>    lib/libv4l-exynos4-camera/libv4l-exynos4-camera.c  | 2486 ++++++++++++++++++++
>>>>    5 files changed, 2642 insertions(+), 2 deletions(-)
>>>>    create mode 100644 lib/libv4l-exynos4-camera/Makefile.am
>>>>    create mode 100644 lib/libv4l-exynos4-camera/libv4l-devconfig-parser.h
>>>>    create mode 100644 lib/libv4l-exynos4-camera/libv4l-exynos4-camera.c
>>>
>>> Ugh, that is a big plugin. Can you please split out the parser stuff
>>> into a separate file ?
>>
>> Yes, I tried to split it, but spent so much time fighting with
>> autotools, that I decided to submit it in this form and ask
>> more experienced v4l-utils build system maintainers for the advice.
>> I mentioned this in the cover letter.
>>
>
> What autotools issue in particular?
> The following change followed by "automake && ./configure" should be
> enough to add a new file libv4l-devconfig-parser.c:

The same modifications produced libv4l-exynos4-camera.so without parser 
symbols, when I applied them previously, but when I tried them again
everything is ok. Probably I wasn't doing proper cleanup.
Thanks for the hints.

Best Regards,
Jacek Anaszewski
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