[linux-dvb] Rationalisation of /dev/adapterX/caY devices

Manu Abraham abraham.manu at gmail.com
Tue Apr 11 17:55:09 CEST 2006


Georg Acher wrote:
>
> There is already HW out, but it's no PCI adapter. The Reelbox uses such a HW
> scheme. There is a 14x14 data crossbar/matrix to connect any data source (4
> frontends, 4 pid filters, 4 CAs, TS from the CPU) to any data sink
> (pid-filter, CA, DMA). Looks a bit oversized, but the FPGA implementation is
> not much more complicated than fixed paths with synchronisation stages.
>
>   

Ah, nice to know. What i did mention was a PCI card though.

> The RB-driver uses a separate matrix control ioctl to work around this missing
> feature in the API. It is assumed in the driver that the
> frontend/pid-filter/DMA path is fixed. Only the CAs are inserted or removed,
> they can also be chained.
>
>   
Once you have a device to control the flow, you can have it in a variety 
of combinations.


Manu




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