[FFmpeg-devel] [WIP] libsox wrapper

[Stefano Sabatini]

On date Friday 2013-04-05 18:07:35 +0200, Stefano Sabatini encoded:
> On date Sunday 2013-03-31 18:22:13 +0200, Stefano Sabatini encoded:
> > On date Thursday 2013-03-21 21:15:07 +0100, Stefano Sabatini encoded:
> > [...]
> > Updated, this time with a correct subject line, and hopefully working
> > drain.
> > 
> > Try it with:
> > ffplay -f lavfi "flite=text=hey, sox=echo 0.8 0.7 1000 0.5 2000 0.3"
> > 
> > Still missing:
> > - proper configuration of effects
> > - proper multi-channel support
> > - thread-safe init
> > -- 
> > FFmpeg = Fanciful Fierce Miracolous Ponderous Esoteric Gangster
> 
> > From 519a5ad62b9dfa44c164a686261a8c6f141775bf Mon Sep 17 00:00:00 2001
> > From: Stefano Sabatini <stefasab at gmail.com>
> > Date: Mon, 22 Aug 2011 14:37:42 +0200
> > Subject: [PATCH] lavfi: add libsox wrapper
> > 
> > Still incomplete.
> > 
> > Based on a patch by Mina Nagy Zaki <mnzaki at gmail.com>.
> > ---
> >  configure                |    4 +
> >  doc/filters.texi         |   37 ++++
> >  libavfilter/Makefile     |    1 +
> >  libavfilter/af_sox.c     |  428 ++++++++++++++++++++++++++++++++++++++++++++++
> >  libavfilter/allfilters.c |    1 +
> >  5 files changed, 471 insertions(+)
> >  create mode 100644 libavfilter/af_sox.c
> 
> Updated WIP, not yet working properly with multichannel support, for
> example:
> ffplay -f lavfi "anullsrc=r=22100:cl=quad,sox=synth sin %-12 sin %-9 sin %-5 sin %-2"
> ffplay -f lavfi aevalsrc="-0.4:0.4" -af "sox=earwax"
> 
> still have problems, and I still have various crashes with various
> effects.
> 
> As for what regards thread init, I wonder if we need to use a mutex or
> atomic.h should be enough.
> 
> Finally, regarding configuration, I'm assuming all the filters to
> accepts whatever format, and that this is the same for input and
> output. This works for most filters, but not for a few (e.g. mixer,
> rate, which sets the output depending on the input - and which are
> difficult to integrate in our query_formats() mechanism).


Updated WIP, with a few fixes, in particular I fixed noiseprof, while
noisered still seems to have problems:

For example;
ffmpeg -i test.ogg -af "sox=noisered test.noiseprof,ashowinfo" -f null -

crashes here.
-- 
FFmpeg = Friendly Faithless Maxi Pitiless Ermetic Gladiator
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