[FFmpeg-devel] [PATCH] all: use M_SQRT1_2, M_SQRT2, M_PI

Ganesh Ajjanagadde gajjanag at mit.edu
Fri Nov 20 14:35:36 CET 2015

On Thu, Nov 19, 2015 at 2:35 PM, Paul B Mahol <onemda at gmail.com> wrote:
> On 11/19/15, Ganesh Ajjanagadde <gajjanag at mit.edu> wrote:
>> On Thu, Nov 19, 2015 at 12:35 PM, Nicolas George <george at nsup.org> wrote:
>>> Le nonidi 29 brumaire, an CCXXIV, Derek Buitenhuis a ecrit :
>>>> Paul uses FreeBSD, if I recall. This is probably with glibc.
>>> Still, M_PI is meant to have the full precision of the underlying type,
>>> and
>>> I very much doubt that kind of bug to be present in any common
>>> implementation. And let us be realistic, the number of digits in
>>> af_dynaudnorm.c is nothing but ludicrous.
>> Exactly. Can't pull the source for bsd easily, but it likely is
>> identical to openlibm since openlibm imported from freebsd:
>> https://github.com/JuliaLang/openlibm/blob/master/include/openlibm_math.h
>> which has an identical definition to gnu libm for M_PI.
>> If such a silly, easily fixed bug exists with some libm, it can be
>> fixed in a few minutes on their end, and I personally would do my best
>> to publicize it to highlight the fundamental brokenness of said libm
>> for the benefit of their users.
> OK, you can change it.

Pushed just this change for now, thanks. Will push the remainder soon.

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