[MPlayer-dev-eng] [PATCH] Mac OS X native audio output

Anders Johansson ajh at watri.org.au
Fri May 23 06:45:30 CEST 2003

Hi wojtek,

I wrote libaf. 

I started to rewrite libao2 to fix all the problems you are
describing, but I ran out of time. I have a work in progress if you
are interested. I will get more time in about two weeks.


> On Thu, 22 May 2003, D Richard Felker III wrote:
> > > maybe this patch would help? it modifies MP_CMD_VOLUME a bit. if
> > > af_volume is loaded, it uses its control interface instead of the
> > > mixer_*() functions.
> > 
> > IMO it would make more sense to put this change *in* the mixer_*
> > functions, like it was before for pl_volume.
> unfortunately mixer functions know nothing about audio stream, so i
> couldn't find any way to get af_stream_t for af->control(). and passing
> af_stream_t to mixer_setvolume() and the rest doesn't seem to be elegant
> solution.
> > Ideally, it should pass
> > volume get/set commands down the af filter chain, to be intercepted by
> > the first volume filter if present, and otherwise by the ao. However,
> > I'm not sure libaf was that well-designed... :(
> i've written af_control() that passes control request to the first or
> all audio filters that can handle it. but it's useless if mixer
> functions don't know af_stream_t.
> regards,
> wojtek
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