[MPlayer-dev-eng] Audio Filter Layer

[Bohdan Horst]

On Sat, Mar 09, 2002 at 12:57:21PM +0100, Attila Kinali wrote:
> On Thu, 28 Feb 2002 11:20:56 +0800
> Anders Johansson <ajh at atri.curtin.edu.au> wrote:
> 
> > Hi,
> > 
> > > > Yes I have rescheduled so it will be ready Real Soon Now (TM), na just
> > > > kidding I haven't started yet but it is easy to implement so it won't
> > > > take long to finish it.
> > > 
> > > do you plan to read whole audio stream, find highest volume and then set up
> > > software mixer? or you will dinamically set volume depending on avg/max
> > > volume, similar to brightness control of postprocess filter?
> > 
> > I will make it adaptive, the way a commercial analog compressor/limiter 
> > works, i.e. run the sound through a nonlinear filter that changes over
> > time depending on the envelope of the data stream. 
> 
> I'd like also to have a fixed normalizer.
> Maybe this should be implemented in a two pass system
> ie something like this:
> 1) run mplayer -getnormalize to get the normalize factor
> 2) run mplayer -normalize <factor>

and

3) run mplayer -autonormalize  to automate 1 and 2  :))

best regards

-- 
 / irl:Bohdan 'Nexus' Horst | mailto:nexus at irc.pl | irc:Nexus \
{---------------------------^----------v----------^------------}
 \ http://www.physd.amu.edu.pl/~nexus/ | Instytut Fizyki  UAM /