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

[Eli Friedman]

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.

-Eli
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