[FFmpeg-devel] [PATCH 1/2] avcodec/alacdec: split off decorrelate_stereo and append_extra_bits as alacdsp

[Michael Niedermayer]

On Sun, Oct 04, 2015 at 11:51:58PM +0000, Timothy Gu wrote:
> On Sun, Oct 4, 2015 at 2:21 PM Michael Niedermayer <michaelni at gmx.at> wrote:
> 
> > there is a spec ?
> >
> 
> Don't think so for the codec itself.
> 
> 
> > i only know of soe reference source code and i looked yesterday
> > and it usesed the full 8 bits unless i missed something
> >
> 
>  https://alac.macosforge.org/trac/browser/trunk/codec/ALACEncoder.cpp says
> that mixRes (aka decorr_left_weight) can be up to 4.

in absence of a spec the decoder is the next best to understand the
limitations of a format.
A encoder is generally not a good choice because the limits of version
"1.0" of a encoder could differ fro version "1.1"

[...]
-- 
Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

Observe your enemies, for they first find out your faults. -- Antisthenes
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