[linux-audio-dev] LADSPA AC3 encoder?

Question for the DSP gurus:

How hard would it be to implement an AC3 encoder as a LADSPA plugin that
could be used in an ALSA config to encode stereo and 5.1 sources on the
fly? Many Windows drivers seem to contain one, and it would be a nice
response to the naysayers on LKML who doubt the power of ALSA.

It appears that a simple AC3 encoder is ~1500 lines of code:

http://www.koders.com/c/fid04210C5E2BC83FC0BA5E0A2A1C37D52503E31EFD.aspx

http://www.telos.de/Surround_Sound_Formats.360.0.html#1051

FWIW, when emu10k1/2 based cards first came out Creative claimed the DSP
was powerful enough to do AC3 encoding on the fly, but, they never
shipped an implementation - their drivers did it in software. One of
their engineers said the DSP wasn't suited for the frequency domain
processing required to encode AC3.

Lee
Received on Sun Jan 29 08:15:08 2006