Re: Frequency table library suggestion

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Kentaro Fukuchi (fukuchi@xxxxxxxxxxxxxxx):

> > I can't see a need for yet-another library through.  The config file
> > syntax is one of the common ones out there (xawtvrc / smb.conf
> > style), it is easy to parse and there are probably even ready-to-go
> > libraries which can do that for you. 
> 
> Maybe that's true, but I think it would be nice to produce a reference
> code (library) with the data.
> 
> Anyway, should I open a project page at SourceForge or Savannah?  Or,
> do you have a plan to open the page in bytesex.org?  Or, it should be
> with Video4Linux page? (I don't know where)

  I also went through some pain in trying to figure out the frequency
list mess in tvtime.  We haven't decided on a solution officially.

  At first I believed that a config file for frequency lists would be a
good idea.  I thought the best place to start would be the frequency
list from the DScaler project.  Looking at Gerd's frequency tables, one
thing I like about it is that it's one file, rather than a whole load of
very whitespaced/verbose files.  I prefer the DScaler file.

  However, diz sort of convinced me that having the frequency table in
the executable isn't such a bad idea.  For one, it lets you handle
HRC/IRC NTSC cable modes better, and arguably the tables should very
rarely ever be updated.  Also, the frequencies.h in his latest tvset was
much nicer than the one that everyone seems to be using now.

  There were, however, some recent exceptions.  The optus cable
frequencies in australia that were added, and also this crazy alternate
NTSC mode, misnamed "canada-cable" in xawtv currently (this is not
standard in canada at all, and seems to be used in some odd closed
circuit cable for apartments in both US and Canada?  does anyone know
where this came from?).  Also, another PAL-NC frequency list was posted
to the DScaler list for some country, I'm not sure if it's the same as
the Argentina frequencies.

  But I think these exceptions are rare enough that we can have a small
set of standard maps, and it is nice to have simple functions for IRC
and HRC NTSC modes rather than having whole new frequency tables., I'm a
little tempted to go back to the config file, but only very slightly.
Maybe this weekend when I get a chance to re-clean-up our frequency code
I'll post my suggestion for a header file solution.  Otherwise, if we do
want to standardize on a config file format, I'd rather go with the
DScaler channels.txt file.

-- 
Billy Biggs
vektor@xxxxxxxxxxxx





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