[linux-dvb] Re: Global channels config in libdvb

[Benjamin Forgeau <forgeau@tu-harburg.de>]

	Hi,

	Thanks for your answer,

On Monday 19 August 2002 14:00, mocm@metzlerbros.de wrote:
> Benjamin Forgeau writes:
>  > 
>  > 	Hi you all,
>  > 
>  > 	Merely a remark.
>  > 
>  > 	I was reading the linux dvb api and was wondering why there is no 
>  > simple function to configure a channel from a list of known 
channels. 
>  > When I see how different are cable and sat configurations, I feel 
that 
>  > some function should hide it for the application.
> 
> That does not belong into the kernel.

	sure

> 
> 
>  > 
>  > 	It would make sense to have an /etc/dvb/channels.conf, and/or 
>  > transponders.conf, where we could globally write a list of the 
>  > available channels (data/video/audio). Every dvb-application needs 
it, 
>  > and it does not change this often. Maybe kind of moving the code 
from 
>  > linvdr into libdvb?
>  > 
> 
> Are you talking about the kernel API, or the libdvb library that comes
> with the drivers?

	libdvb. I had a second look, in DVB/libdvb we have a class DVB 
(undocumented as far as I know). It is more or less what I mean, the 
code does exist! It's just a matter of chosing how global the channels 
are set, and how many pages of standards and API documentation you have 
to read before you can start with the development of a small 
application.

	Anyway, the goal is only that an unexperienced programmer can write 
something like:

#include "dvb.h"

void main(int argc, char* argv[])
{
  dvb_init(0, 0, 0, "/etc/dvb/channels.conf"); // sets first card, etc
  dvb_set_source_video_channel(atoi(argv[1]));
  printf("%s\n", dvb_get_current_channel_name());
  dvb_start_play();
}

#~> gcc dvbzap.c -o dvbzap -ldvb

 	I see two goals for it. First you don't need to rewrite tuning conde 
for every application. Second, how can I write and verify code that 
uses a sat card if I only have cable? As cable-only user (it would be 
very long, expensive and complicated to get satellite in my house), I 
have no big idea what is the sec device, and I don't want to change my 
application as soon as a new device arrive, for which my configuration 
file is not be sufficient...

	It is not a big deal, just creating simple functions that hide the 
internals of tuning.


	I hope I'm not too much off topic!

		regards
	

		ben
> 
> Marcus
> 
> -- 
> /--------------------------------------------------------------------\
> | Dr. Marcus O.C. Metzler        |                                   |
> |--------------------------------|-----------------------------------|
> | mocm@metzlerbros.de            | http://www.metzlerbros.de/        |
> \--------------------------------------------------------------------/
> 
> 
> 
> -- 
> Info:
> To unsubscribe send a mail to listar@linuxtv.org with "unsubscribe 
linux-dvb" as subject.
> 
> 



--
Info:
To unsubscribe send a mail to listar@linuxtv.org with "unsubscribe linux-dvb" as subject.