[linux-dvb] [PATCH] tda1004x driver has code to support HIERARCHY_AUTO, but does not set FE_CAN_HIERARCHY_AUTO

Wolfgang Wegner wolfgang at leila.ping.de
Tue Sep 18 16:30:30 CEST 2007


On Tue, Sep 18, 2007 at 05:33:43PM +0200, Patrick Boettcher wrote:
> On Tue, 18 Sep 2007, Wolfgang Wegner wrote:
> 
> > just a stupid question:
> > How is a frontend supposed to handle that anyways?
> > The demods I know about only have one transport stream output,
> > how are high and low priority data separated?
> > (I was thinking it would have to be done by PID on a packet-by-packet
> > base, so it would transparent to the demux layer, but I did not find
> > an application really using hierarchical transmission yet.)
> 
> Each stream is a "standalone" MPEG2 transport stream. So if hierarchy is 
> used, the user has to select the stream he wants.

Thank you, although this sounds really unlogical to me, because I always
thought this was targeted at hierarchical coding, and then the high-
priority data has to be sent twice.

Regards,
Wolfgang




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