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Date:      Fri, 15 Jul 2016 17:43:43 +0000
From:      bugzilla-noreply@freebsd.org
To:        freebsd-ports-bugs@FreeBSD.org
Subject:   [Bug 209742] devel/godot: Update to 2.0.4.1; add devel/godot-tools port
Message-ID:  <bug-209742-13-VhUZU0TAtd@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-209742-13@https.bugs.freebsd.org/bugzilla/>
References:  <bug-209742-13@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D209742

--- Comment #51 from lightside <lightside@gmx.com> ---
(In reply to comment #49)
> With the upcoming release of 11.0 we also need to add a small adjustment =
to RtAudio.cpp.
>
> This updated patch adds the following to the previous 2.0.4.1 update to t=
he
> end of files/patch-drivers_rtaudio_RtAudio.cpp. sampleRate is an unsigned=
 int
> so srate gets promoted to unsigned int, this means the result is always
> positive so the use of abs() is of no use.

I think, that your logic about srate is wrong, because srate defined as int:
https://github.com/godotengine/godot/blob/820dd1d0016763cda6177104e66e09c86=
34150be/drivers/rtaudio/RtAudio.cpp#L9018
I placed following debug code near your patched place:
printf("srate=3D%d, sampleRate=3D%d, srate - sampleRate =3D %d, abs(srate -
sampleRate) =3D %d\n", srate, sampleRate, srate - sampleRate, abs(srate -
sampleRate));
with following output:
srate=3D44100, sampleRate=3D44100, srate - sampleRate =3D 0, abs(srate - sa=
mpleRate)
=3D 0

But there are other possible cases, where abs is needed.
-8<--
#include <stdio.h>
#include <stdlib.h>

int check(int a, unsigned int b)
{
        return (a - b) > 100;
}

int check_abs(int a, unsigned int b)
{
        return abs(a - b) > 100;
}

int main()
{
        unsigned int c =3D 44200;
        for (int i =3D 44100; i <=3D 44300; i +=3D 100)
                printf("check(%d, %d) =3D %d; check_abs(%d, %d) =3D %d\n", =
i, c,
check(i, c), i, c, check_abs(i, c));

        return 0;
}
-->8-
% c++ test.cpp -o test && ./test
check(44100, 44200) =3D 1; check_abs(44100, 44200) =3D 0
check(44200, 44200) =3D 0; check_abs(44200, 44200) =3D 0
check(44300, 44200) =3D 0; check_abs(44300, 44200) =3D 0

Without abs, the first case is wrong, i.e. possible srate =3D 44100 and
sampleRate =3D 44200.
There are cases with fabs in the same code:
https://github.com/godotengine/godot/blob/820dd1d0016763cda6177104e66e09c86=
34150be/drivers/rtaudio/RtAudio.cpp#L1093
https://github.com/godotengine/godot/blob/820dd1d0016763cda6177104e66e09c86=
34150be/drivers/rtaudio/RtAudio.cpp#L1148

And this is not related to FreeBSD 11 at all, because issue with abs is
different, related to possible abs redefinition. There are many other place=
s in
the source code with abs usage:
https://github.com/godotengine/godot/blob/820dd1d0016763cda6177104e66e09c86=
34150be/drivers/opus/celt/celt_encoder.c#L651
https://github.com/godotengine/godot/blob/820dd1d0016763cda6177104e66e09c86=
34150be/drivers/opus/celt/cwrs.c#L447
https://github.com/godotengine/godot/blob/820dd1d0016763cda6177104e66e09c86=
34150be/drivers/theora/analyze.c#L753
https://github.com/godotengine/godot/blob/820dd1d0016763cda6177104e66e09c86=
34150be/drivers/vorbis/floor1.c#L265
etc.

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