2 This file is part of LilyPond, the GNU music typesetter.
4 Copyright (C) 1998--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/>.
23 #include "lily-proto.hh"
25 #include "rational.hh"
28 A "tonal" pitch. This is a pitch used in diatonal western music
29 (24 quartertones in an octave), as opposed to a frequency in Hz or a
30 integer number of semitones.
32 Pitch is lexicographically ordered by (octave, notename, alteration).
35 class Pitch : public Simple_smob<Pitch>
38 static SCM equal_p (SCM, SCM);
39 int print_smob (SCM, scm_print_state *) const;
40 SCM mark_smob () const;
41 static const char * const type_p_name_;
48 void transpose (Pitch);
51 void normalize_octave ();
52 void normalize_alteration ();
56 int get_octave () const;
57 int get_notename () const;
58 Rational get_alteration () const;
60 Pitch (int octave, int notename, Rational accidental = 0);
63 Pitch transposed (Pitch) const;
64 Pitch to_relative_octave (Pitch) const;
66 Pitch normalized () const;
68 static int compare (Pitch const &, Pitch const &);
71 Rational tone_pitch () const;
72 int rounded_semitone_pitch () const;
73 int rounded_quartertone_pitch () const;
74 Pitch negated () const;
75 string to_string () const;
77 DECLARE_SCHEME_CALLBACK (less_p, (SCM a, SCM b));
93 extern Rational DOUBLE_FLAT_ALTERATION;
94 extern Rational THREE_Q_FLAT_ALTERATION;
95 extern Rational FLAT_ALTERATION;
96 extern Rational SEMI_FLAT_ALTERATION;
97 extern Rational NATURAL_ALTERATION;
98 extern Rational SEMI_SHARP_ALTERATION;
99 extern Rational SHARP_ALTERATION;
100 extern Rational THREE_Q_SHARP_ALTERATION;
101 extern Rational DOUBLE_SHARP_ALTERATION;
103 SCM ly_pitch_diff (SCM pitch, SCM root);
104 SCM ly_pitch_transpose (SCM p, SCM delta);
106 INSTANTIATE_COMPARE (Pitch, Pitch::compare);
108 extern SCM pitch_less_proc;
109 Pitch pitch_interval (Pitch const &from, Pitch const &to);
110 extern SCM Pitch_type_p_proc;
112 #endif /* PITCH_HH */