diff options
author | Paul Davis <paul@linuxaudiosystems.com> | 2008-06-02 21:41:35 +0000 |
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committer | Paul Davis <paul@linuxaudiosystems.com> | 2008-06-02 21:41:35 +0000 |
commit | 449aab3c465bbbf66d221fac3d7ea559f1720357 (patch) | |
tree | 6843cc40c88250a132acac701271f1504cd2df04 /libs/ardour/ardour/dB.h | |
parent | 9c0d7d72d70082a54f823cd44c0ccda5da64bb6f (diff) |
rollback to 3428, before the mysterious removal of libs/* at 3431/3432
git-svn-id: svn://localhost/ardour2/branches/3.0@3435 d708f5d6-7413-0410-9779-e7cbd77b26cf
Diffstat (limited to 'libs/ardour/ardour/dB.h')
-rw-r--r-- | libs/ardour/ardour/dB.h | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/libs/ardour/ardour/dB.h b/libs/ardour/ardour/dB.h new file mode 100644 index 0000000000..b67e581067 --- /dev/null +++ b/libs/ardour/ardour/dB.h @@ -0,0 +1,33 @@ +/* + 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 + 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, write to the Free Software + Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + +*/ + +#ifndef __ardour_dB_h__ +#define __ardour_dB_h__ + +#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) { + return 20.0f * fast_log10 (coeff); +} + +#endif /* __ardour_dB_h__ */ |