[linux-dvb] Re: V4 API proposal

[Ralph Metzler <rjkm@metzlerbros.de>]

Florian Schirmer writes:
 > >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

OK, that's also how I thought it should be.

 > 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.

Yes, but I wanted to know how I control the special (but common to the
hardware type) features of these devices.


Ralph


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