[Gambas-devel] Video4Linux2 compile error svn Gambas 3 on Ubuntu Hardy 8.04

[Ron_1st]

On Saturday 25 July 2009, Benoît Minisini wrote:
> >
> > O yes, you can get it :)
---8<-----
> > exists for later maintenance, I agree with that too
> > Best regards,
> 
> Thanks, I committed your changes. I put between #if 0 ... #endif some lines of 
> codes in CWebcam.c, in the function CWEBCAM_source, because they were dirty 
> and I thought they were doing nothing real. If I was wrong, please tell me, 
> but please clean up this part of the code.
> 

Code is orginal from Daniel Campos and rework by Gareth.
If you mean the BEGIN PROPERTY(CWEBCAM_source), I do not see dirty code.

You can have your webcam connected to a TV-Card and the card can have 4 input
connections with one out of for video norms.

I use sometimes 4 cameras connected to a multiplexer and the output goes into a 
Terratec TV-Card(v4l1 and v4l2) composite input. 
The usb Philips webcam(v4l2) looks to Schiphol Airport and a usb microscoop(v4l1)
is also time by time in use.
By using vloopback the mix of v4l1 and v4l2 works but setup is a mess this way.
The flash/swf object on the webpage accept only v4l1.
I'm now using a complete hardware solution with seperate monitor.

> >
> > So there are only two files involved in my change:
> > 1) 'CWebcam.h', 2) 'gv4l2.c'
> >
> > Code from trunk gambas3 revision ??? (~1860) in v4l2_src.tar.gz
> >
> > Ron_1st
> >
> >
> > PS:
> > I did post about this change here in the list several times
> > found:
> > [Gambas-devel]  unknown V4L2_PIX_FMT_???? formats at 2009-01-24 18:40
> > [Gambas-devel] gbv4l2.c missing some V4L2_PIX_FMT_ format declaration
> > kubunt 8.04 at 2009-01-28 20:04
> > and my patch
> > [Gambas-devel] gb.v4l rework the gv4l2.c at 2009-02-22 17:51
> > [Gambas-devel] gb.v4l rework the gv4l2.c at 2009-02-22 17:53 (gv4l2c.zip)
> > I do not have the mood to reread it all again.
> > For me I just put "my" gv4l2.c and see what happens.
> > I did start a new v4l2 project but my actual split to seperate parts where
> > not welkom at that time.
> > I did need support for more as ONE camera and some with sound and/or a
> > tuner.
> >
> >
> > Just some old brainstorm:
> > dim camdev as new v4ldev("BT878") 'the device from v4l2
> > dim tuner1 as new v4ltuner('"DVBT") ' add the tuner
> > dim tuner2 as new v4ltuner('"DVBC") ' an other type tuner
> > dim sound1 as new v4lsound("bt878snd") ' where sound come from
> >   tun.channels.load=file("channels.txt") 'I want to see TV5, ARD, RTL
> >   camdev.tuner=tuner1
> >   camdev.sound=sound1
> >   camdev.ctrl.load=file("control.txt") ' my default image/sound settings
> >   camdev.ctrl.volume=25 ' always use at start now in percent
> >   camdev.ctrl.brightness=50 ' same for the image
> >
> > This way you could add those available parts to the device you need.
> > The idea was to make a general component usable for webcam and other
> > video/tv cards.
> 
> I have no news from Gareth for a long time. But if you can enhance the 
> component in a sane, beautiful and powerful way, don't hesitate! :-)

I should cleanup my mind and create a proposal for review.
In the discusion at start this year Gareth wishes where a single simple
component just for the webcam he owns. I had another webcam with some other
functions and did a proposal to make subcomponents, the tuner and sound, but
it was denied at that time.
The code I had at that moment as VB aplication and C driver source for Windows 
made by me for a video security system was a good template but I dumped all 
the windows code a few months back. 

> 
> Just explain things in detail, as I don't know anything about v4l, camera, 
> tuner, etc. I will be able to give you advices about the component interface.
> 
Big parts of the current code is usable with none or minor modifications.
The hardest point will be the seperation to and adding the subcomponents and
the a correct naming of them.

I'll look at it what I can do.

> Best regards,
> 


Best regards,

Ron_1st