[FFmpeg-devel] [PATCH] Add Escape (RPL) ADPCM decoder

Michael Niedermayer michaelni
Wed Apr 2 02:59:50 CEST 2008

On Tue, Apr 01, 2008 at 05:43:22PM -0700, Eli Friedman wrote:
> Currently, RPL files with ADPCM audio are using
> CODEC_ID_ADPCM_IMA_EA_SEAD, which isn't really right (the sound is
> clearly quieter than it should be).  Per Mike Melanson, the correct
> algorithm is actually IMA ADPCM minus the "+0.5" step, although I
> can't hear the difference between that and regular IMA ADPCM.
> Attached patch adds a separate Escape ADPCM decoder that uses this
> algorithm.

Iam not completely sure if this makes sense if you cannot hear a difference.
We could just use the IMA ADPCM decoder or?
But either way, as it is currently its code duplication and that is

Michael     GnuPG fingerprint: 9FF2128B147EF6730BADF133611EC787040B0FAB

In a rich man's house there is no place to spit but his face.
-- Diogenes of Sinope
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