[linux-dvb] Re: AC3 output through soundcard (S-PDIF)

[Matthias Weingart <matthias@pentax.boerde.de>]

On Tue, 19 Jun 2001, Klaus Schmidinger wrote:

> Ralf Bauer wrote:
> > 
> > Now that VDR can record an AC3 stream, as far as I have understood Klaus,
> > the next step for VDR would be to output the recorded AC3 data somehow on
> > the soundcard. I wanted to help a little bit and did some research on this
> > topic.
> 
> Well, currently VDR can record two audio streams. You can, of course, set
> the second audio PID to the AC3 PID, but I intend to introduce two additional
> PIDs for that purpose. That way VDR can record two "normal" audio streams
> plus two digital audio streams, in case all this is broadcast. The reason why
> I need to have separate DPIDs ("Digital audio PID") is that I need to use
> specific packet ids in the recorded PES file in order to filter out the
> digital audio data when replaying.

Hi Klaus,

why not supporting "unlimited" number of audio tracks? You have still a
comma separated list of audio-pids; that are handeld as apid1 and apid2 in
the code. Why not accessing it as apid[0] and apid[1], and a loop
for(i=0; i<apidcount; i++) every time you access it?
It make sense - you can not imagine how your vdr is used in the future;
and saves much work - you do not need to patch it if you want to store 5
pids. Anyway there have to be specified what pid is used for ac3; and what
is played...

        Matthias




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