source file of the GNU LilyPond music typesetter
- (c) 1998--2006 Han-Wen Nienhuys <hanwen@xs4all.nl>
+ (c) 1998--2008 Han-Wen Nienhuys <hanwen@xs4all.nl>
*/
#ifndef MUSICAL_PITCH_HH
#include "lily-proto.hh"
#include "smobs.hh"
+#include "rational.hh"
+
/** A "tonal" pitch. This is a pitch used in diatonal western music
(24 quartertones in an octave), as opposed to a frequency in Hz or a
Pitch is lexicographically ordered by (octave, notename,
alteration).
-
- TODO:
-
- - add indeterminate octaves, so it can be used as a key in keySigature
*/
class Pitch
{
-private: // fixme
- /*
- TODO: use SCM
- */
-
- int notename_;
- int alteration_;
+private:
int octave_;
+ int notename_;
+ Rational alteration_;
+ Scale *scale_;
void transpose (Pitch);
void up_to (int);
void down_to (int);
- void normalise ();
+ void normalize_octave ();
+ void normalize_alteration ();
+ void normalize ();
public:
-
int get_octave () const;
int get_notename () const;
- int get_alteration () const;
+ Rational get_alteration () const;
- Pitch (int octave, int notename, int accidental);
+ Pitch (int octave, int notename, Rational accidental);
+ Pitch (int octave, int notename);
Pitch ();
Pitch transposed (Pitch) const;
static int compare (Pitch const &, Pitch const &);
int steps () const;
- int semitone_pitch () const;
- int quartertone_pitch () const;
+ Rational tone_pitch () const;
+ int rounded_semitone_pitch () const;
+ int rounded_quartertone_pitch () const;
+ Pitch negated () const;
string to_string () const;
DECLARE_SCHEME_CALLBACK (less_p, (SCM a, SCM b));
- DECLARE_SIMPLE_SMOBS (Pitch,);
+ DECLARE_SIMPLE_SMOBS (Pitch);
+};
+
+
+enum {
+ DOUBLE_FLAT = -4,
+ THREE_Q_FLAT,
+ FLAT,
+ SEMI_FLAT,
+ NATURAL,
+ SEMI_SHARP,
+ SHARP,
+ THREE_Q_SHARP,
+ DOUBLE_SHARP,
};
-enum
- {
- DOUBLE_FLAT = -4,
- THREE_Q_FLAT,
- FLAT,
- SEMI_FLAT,
- NATURAL,
- SEMI_SHARP,
- SHARP,
- THREE_Q_SHARP,
- DOUBLE_SHARP,
- };
+extern Rational DOUBLE_FLAT_ALTERATION;
+extern Rational THREE_Q_FLAT_ALTERATION;
+extern Rational FLAT_ALTERATION;
+extern Rational SEMI_FLAT_ALTERATION;
+extern Rational NATURAL_ALTERATION;
+extern Rational SEMI_SHARP_ALTERATION;
+extern Rational SHARP_ALTERATION;
+extern Rational THREE_Q_SHARP_ALTERATION;
+extern Rational DOUBLE_SHARP_ALTERATION;
SCM ly_pitch_diff (SCM pitch, SCM root);
SCM ly_pitch_transpose (SCM p, SCM delta);
INSTANTIATE_COMPARE (Pitch, Pitch::compare);
-int compare (vector<Pitch> *, vector<Pitch> *);
extern SCM pitch_less_proc;
Pitch pitch_interval (Pitch const &from, Pitch const &to);