[Mplayer-dev-eng] AC3 output.

[Arpi]

Hi,

> > 	Finally I make AC3 output works under SBLive in SMP, so I'm
> > continuing/starting with the AC3 output support in mplayer (maybe later
> > continue with IFO/RawDVD support :-). Anybody working on it right now?
> 
> 	I need to make some changes to libac3, I should use the
> QUERY_FORMAT in control() in ao_oss.c if the /dev/dsp is able to do raw
> AC3 output through SPDIF before decoding the frame, but after looking
> through the code it seems that there is no defined API for doing that.
> Could I use the (int arg) for it as I would like? for example passing the
> AFMT_AC3 (maybe the "correct" way to query formats should be that,
> shouldn't it?).
You have to define an uniqe constant in audio_out.h for this.
Then you can use the general-purpose control() function with this
constant as 'cmd' for anything. It's like ioctl's.

> 	I would also like to know if I should initialize the card (loading
> the correct DSP patch and setting the routes) or should let the user
> do it before playing through SPDIF? In current emu10k1 opensource driver
> CVS it seems that the location of the necesary files is quite standard, so
> it could be done in mplayer without many problems, but I think that the
> user should care of it, to make the card able to play AC3 (and responding
> so when ioctl() it for AFMT_AC3). What do you think?
Leave it to the user.


A'rpi / Astral & ESP-team

--
mailto:arpi at thot.banki.hu
http://esp-team.scene.hu

_______________________________________________
Mplayer-dev-eng mailing list
Mplayer-dev-eng at lists.sourceforge.net
http://lists.sourceforge.net/lists/listinfo/mplayer-dev-eng