X-Git-Url: https://main.carlh.net/gitweb/?a=blobdiff_plain;f=libs%2Fardour%2Fardour%2FdB.h;h=d2675fb3c9bdcfe5a9ce13b7aef209af6edf1678;hb=452672f78f5f0f9195bfd48398e29b18a8fb1df7;hp=b67e58106714a54a00581eec1ad0322299d948a6;hpb=99904735e066804358f1d0bd138a84f1e9ecda91;p=ardour.git diff --git a/libs/ardour/ardour/dB.h b/libs/ardour/ardour/dB.h index b67e581067..d2675fb3c9 100644 --- a/libs/ardour/ardour/dB.h +++ b/libs/ardour/ardour/dB.h @@ -1,5 +1,5 @@ /* - Copyright (C) 2001 Paul Davis + Copyright (C) 2001 Paul Davis 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 @@ -20,14 +20,20 @@ #ifndef __ardour_dB_h__ #define __ardour_dB_h__ -#include +#include "pbd/fastlog.h" static inline float dB_to_coefficient (float dB) { return dB > -318.8f ? pow (10.0f, dB * 0.05f) : 0.0f; } -static inline float coefficient_to_dB (float coeff) { +static inline float fast_coefficient_to_dB (float coeff) { return 20.0f * fast_log10 (coeff); } +static inline float accurate_coefficient_to_dB (float coeff) { + return 20.0f * log10 (coeff); +} + +extern double zero_db_as_fraction; + #endif /* __ardour_dB_h__ */