[linux-dvb] Driver API problem

[Thomas Sailer <sailer@scs.ch>]

This is possibly a newbie problem...

I'm trying to get the raw unfiltered transport stream
to userspace. I'm using the dvb driver version 28.9.2001

What I've done so far:

filterpar.pid = 0;
filterpar.input = DMX_IN_FRONTEND;
filterpar.output = DMX_OUT_TS_TAP;
filterpar.pesType = DMX_PES_OTHER;
filterpar.flags = DMX_IMMEDIATE_START;
ioctl(fd_demux, DMX_SET_PES_FILTER, &filterpar);

and then read from /dev/ost/dvr0. That way I'm getting
transport stream packets with PID 0.

/dev/ost/dvr0 is not documented in the API documentation,
however. From it, I got the impression that I have to
read from demux0, but that doesn't work (read blocks or returns
EAGAIN, depending on O_NONBLOCK).

Also, how do I access the unfiltered transport stream?

Furthermore, I cannot get poll doing anything sensible on
dvr0. It just returns with POLLIN set, but a subsequent
read either blocks or returns EAGAIN...

Tom


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