audio-math.h 1.3 KB

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  1. /******************************************************************************
  2. Copyright (C) 2023 by Lain Bailey <lain@obsproject.com>
  3. This program is free software: you can redistribute it and/or modify
  4. it under the terms of the GNU General Public License as published by
  5. the Free Software Foundation, either version 2 of the License, or
  6. (at your option) any later version.
  7. This program is distributed in the hope that it will be useful,
  8. but WITHOUT ANY WARRANTY; without even the implied warranty of
  9. MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  10. GNU General Public License for more details.
  11. You should have received a copy of the GNU General Public License
  12. along with this program. If not, see <http://www.gnu.org/licenses/>.
  13. ******************************************************************************/
  14. #pragma once
  15. #include "../util/c99defs.h"
  16. #include <math.h>
  17. #ifdef _MSC_VER
  18. #include <float.h>
  19. #pragma warning(push)
  20. #pragma warning(disable : 4056)
  21. #pragma warning(disable : 4756)
  22. #endif
  23. static inline float mul_to_db(const float mul)
  24. {
  25. return (mul == 0.0f) ? -INFINITY : (20.0f * log10f(mul));
  26. }
  27. static inline float db_to_mul(const float db)
  28. {
  29. return isfinite((double)db) ? powf(10.0f, db / 20.0f) : 0.0f;
  30. }
  31. #ifdef _MSC_VER
  32. #pragma warning(pop)
  33. #endif