[linux-dvb] Re: V4 API proposal

["Florian Schirmer" <jolt@tuxbox.org>]

Hi,

>This is a little bit confusing.
>You say if the demux has 2 frontend and 1 memory input it has 
>demux0, demux1 and demux2 but you then you say they are logical 
>devices and have to be mapped to hardware? Couldn't there be 2 
>frontends and 1 memory input but only 1 or 2 demux devices?

Depends on the hardware. If you have 2 fe's and 1 memory input which all can
be used concurrently then you should create 3 logical demux devices for that
(demux0, demux1, demux2). If your hardware has only 2 hardware demuxes to
connect these 3 inputs to, then just create two logical demux devices. The
proposal was somehow unclear in this point. (See other mail).

>What if 2 demuxes use the same source? Which one gets to write?

The first who issued the DMX_SET_SOURCE call.


>What about other (non-frontend) inputs which are not written via 
>memory? This can be parallel/serial inputs which do not come from 
>a tuner like DVB-ASI, directly connected firewire interfaces, LVDS, 
>etc. How do you e.g. select the input rate of a memory input?
>On some hardware this can be controlled.

You can query the availible inputs using the DMX_GET_SOURCES call and then
select e.g. the firewire based input using DMX_SET_SOURCE.

Bye,
  Florian




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