[FFmpeg-devel] [PATCH] 'j_rev_dct_ARM' bugfix

Måns Rullgård mans
Wed Nov 12 21:29:14 CET 2008

Siarhei Siamashka <siarhei.siamashka at gmail.com> writes:

> Hi,
> This is a bugfix for ARMv4 assembly implementation of 'j_rev_dct' function.
> The problem was in the incorrect partially empty row detection. Even
> if the first two coefficients in the row were nonzero, it handled
> this just like the case with only the first nonzero coefficient.
> Now this function produces exactly the same output as the stripped
> down reference C version of 'j_rev_dct' (with the nested checks like
> 'if (d6) { if (d2) { ...' always evaluated as true, avoiding
> shortcut branches).

Thanks, applied.

M?ns Rullg?rd
mans at mansr.com

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