[FFmpeg-devel] [PATCH 0/6] truehd: ARM optimisations

Christophe Gisquet christophe.gisquet at gmail.com
Wed Mar 19 20:37:53 CET 2014


2014-03-19 18:26 GMT+01:00 Ben Avison <bavison at riscosopen.org>:
> I present here a patch series aimed at improving the performance of Dolby
> TrueHD audio decoding on ARM CPUs, with a particular focus on the ARM1176JZF-S
> as featured in the Raspberry Pi. To date, only one function had been
> optimised, and that was only for x86.

I don't expect my old work to bring much (and the branch [based on the
fork] is probably outdated), but I noticed the coefficients used by
mlp_filter_channel were guaranteed to be 16bits. I was expecting to be
able afterwards not to use 64b arithmetics but that failed.

A branch with various things can be found here:


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