[linux-dvb] Writing DVB Software - couple questions

Hamish Moffatt hamish at cloud.net.au
Wed Feb 23 14:42:20 CET 2005


On Wed, Feb 23, 2005 at 04:28:35PM +0400, Manu Abraham wrote:
> Hamish Moffatt wrote:
> >Right, but there wasn't a standard for analog tuners. Last time I tried
> >this (years ago), it seemed that every TV app had its own card database
> >about how the tuner was connected to the Bt848 etc.
> >
> >WDM had the video capture aspects covered but not the tuning.
> >Did this ever get fixed?
> >
> 
> How is that possible, when different cards are having different schemes 
> of interconnection (for example bt878) using the GPIO .. One vendor 
> could connect this way, another that way.. so it makes sense that each 
> app had it's own card database.

No, it makes sense that the vendor provides drivers for the tuner which
implement a standard API for every application. That is what linux-dvb 
does for example.

The same mix of interconnections happens with DVB cards like the ones
that use the Bt878. Also all those analog cards are supported by V4L.
The drivers know how each cards works and implement the standard API.
Of course this can be done on Windows too.


Hamish
-- 
Hamish Moffatt VK3SB <hamish at debian.org> <hamish at cloud.net.au>




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