[FFmpeg-devel] AMR-NB decoder

Colin McQuillan m.niloc
Wed Aug 12 22:54:14 CEST 2009

2009/8/12 Robert Swain <robert.swain at gmail.com>:
> Hey,
> 2009/8/10 Colin McQuillan <m.niloc at googlemail.com>:
> [...]
>> I have tried to address every other comment made in the thread. The
>> main changes are cosmetics, using fixed point tables to save space,
>> and keeping the algebraic codebook vector sparse until
>> anti_sparseness.
>> amrnb-decoder-r2.patch uses high-pass-filterf.patch, agc-3.patch, and
>> circ-addf.patch.
> circ-addf committed after editing the comments a little and discussing
> them with Colin on IRC. I think maybe the high-pass filter should be
> made at least somewhat generic as the missing QCELP postfilter uses a
> filter that is the same order but with different coefficients. I think
> using the stuff from iirfilter.{c,h} would be overkill for this
> purpose. I'm discussing this with Colin too.
> Regards,
> Rob

Here's a more general ff_acelp_high_pass_filterf.
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