[linux-dvb] Re: Streaming from hard disk

["Gert-Jan van Dijk" <aka_mr_zapper@hotmail.com>]

> > Okay, so I'm able to load/unload, open/close, write to the device (for 
> me
> > as a Linux nitwit already an achievment...). Now I want to make use of 
> the
> > dvb_dmx_swfilter() call, and thus copied that one into my source (as 
> it's
> > static in dvb_demux.c).
>
> That can't be right. dvb_dmx_swfilter() is not static because it
> is meant to be called by drivers.
But it is, in 1.0.1 of the driver I see in dvb_demux.c@416:

static inline void
dvb_dmx_swfilter(struct dvb_demux *dvbdmx, const u8 *buf, size_t count)

The functions it calls are exported though, that's why I tried the copy....

> > Looking at the code, I see that I have to fill the
> > dvb_demux struct (Am I right?). But, I haven't got the faintest idea of 
> how
> > to proceed.
>
> If you make your code available then others can comment on it.
> (If it's not too large then post to the list.)
Will do, after I have something to give, currently it's merely a dummy. I 
just wanted to get a little bit better known with Linux device drivers, 
before posting.

> > Questions:
> > 1) Can I just call the dvb_dmx_swfilter() from the write, after setting 
> up
> > the dvb_demux structure?
> > 2) If so, can somebody point me into the right diection of how to set-up
> > the struct?
> > 3) To control the playout speed, can I "simply" use kernel timers, and 
> make
> > sure that in between triggers enough data is sent to the sw filter? Or 
> is
> > this totally the wrong approach?
>
> If you strip the hardware dependent stuff from ttpci/budget-core.c
> and budget-ci.c (i.e. the saa7146* and msp3400* stuff) then you
> have what you need.
Okay, I'll look into that and try to make something of it.

Thanks,

Gert-Jan

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