2 This file is part of LilyPond, the GNU music typesetter.
4 Copyright (C) 2005--2015 Han-Wen Nienhuys <hanwen@xs4all.nl>
6 LilyPond is free software: you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation, either version 3 of the License, or
9 (at your option) any later version.
11 LilyPond is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with LilyPond. If not, see <http://www.gnu.org/licenses/>.
26 #include "std-vector.hh"
27 #include "interval.hh"
29 double log_2 (double x);
32 Return the 2-log, rounded down
39 error ("intlog2 with negative argument: " + ::to_string (d));
62 shift_left (int value, int shiftamount)
64 if (shiftamount < 0) return (value >> -shiftamount);
65 else return (value << shiftamount);
69 linear_interpolate (Real x, Real x1, Real x2, Real y1, Real y2)
71 return (x2 - x) / (x2 - x1) * y1
72 + (x - x1) / (x2 - x1) * y2;
76 normalize (Real x, Real x1, Real x2)
78 return (x - x1) / (x2 - x1);
81 Real directed_round (Real f, Direction d);
83 Real peak_around (Real epsilon, Real threshold, Real x);
84 Real convex_amplifier (Real standard_x, Real increase_factor, Real x);
85 string camel_case_to_lisp_identifier (const string &in);