[MPlayer-dev-eng] [BUG] surround audio plugin broken

[Anders Johansson]

Hi,

> On Mon, Jan 06, 2003 at 02:48:06AM +0100, Michael Niedermayer wrote:
> > Hi
> > 
> > On Monday 06 January 2003 02:24, D Richard Felker III wrote:
> > [...]
> > > > btw IMHO libaf should NOT force float (i mean
> > > > int->float->filter->float->int) by default.
> > > > (only if it's requires (the requiested filter cannot operates on
> > > > integer))
> > >
> > > Agree, it's lame. It can be fixed by -af-adv force=1. But the force
> > > param is only supposed to affect auto-inserted stuff, and right now
> > > the resample plugin forces things to float even if you load it
> > > explicitly with -af resample=44100. I'm guessing that in the future
> > > the force=1 option might do other things that lower quality too, so
> > > it's very bad to require it to get rid of the float nonsense.
> > >
> > > > ppl are already reported slowdowns of 0.90-rc series compared to
> > maybe we should optimize libaf a bit too ...
> > it seems there is a modulo in the innermost loop in the resample filter for 
> > example ...
> > 
> > ill try to optimize the libaf stuff tomorrow perhaps ...
> 
> Cool. AC3 decoding and resampling to 44100 are the two biggest
> bottlenecks preventing realtime dvd playback on my box right now! With
> Fabrice working on the ffmpeg ac3 decoder and libaf optimized, I
> imagine I'll finally be able to play dvds (without -framedrop).

Try the linear interpolation it is faster than the filter bank
resampling.

> Rich

//Anders