/usr/include/obs/media-io/audio-math.h is in libobs-dev 21.0.2+dfsg1-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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Copyright (C) 2015 by Hugh Bailey <obs.jim@gmail.com>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 2 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
******************************************************************************/
#pragma once
#include "../util/c99defs.h"
#include <math.h>
#ifdef _MSC_VER
#include <float.h>
#pragma warning(push)
#pragma warning(disable : 4056)
#pragma warning(disable : 4756)
#endif
static inline float mul_to_db(const float mul)
{
return (mul == 0.0f) ? -INFINITY : (20.0f * log10f(mul));
}
static inline float db_to_mul(const float db)
{
return isfinite((double)db) ? powf(10.0f, db / 20.0f) : 0.0f;
}
#ifdef _MSC_VER
#pragma warning(pop)
#endif
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