[FFmpeg-devel] [PATCH] Document av_gcd()
Sat Feb 28 17:23:59 CET 2009
On Sat, Feb 28, 2009 at 04:53:08PM +0100, Stefano Sabatini wrote:
> as in subject, regards.
> FFmpeg = Funny and Forgiving Multimedia Pitiful Elected Ghost
> Index: libavutil/mathematics.h
> --- libavutil/mathematics.h (revision 17629)
> +++ libavutil/mathematics.h (working copy)
> @@ -50,6 +50,9 @@
> AV_ROUND_NEAR_INF = 5, ///< Round to nearest and halfway cases away from zero.
> + * Returns the greatest common divisor of a and b.
> + */
Two more things should be mentioned:
0 is considered to be dividable by anything, if one or both of a and b
are negative, there are no guarantees on the sign of the result.
(the later part could be fixed easily, though it would be a bit ugly
without first converting it into a non-recursive function - note that
gcc already converts this function into a non-recursive one during
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