-/*
+/*
pitch.hh -- declare Pitch
-
+
source file of the GNU LilyPond music typesetter
-
- (c) 1998--2000 Han-Wen Nienhuys <hanwen@cs.uu.nl>
-
- */
+
+ (c) 1998--2009 Han-Wen Nienhuys <hanwen@xs4all.nl>
+*/
#ifndef MUSICAL_PITCH_HH
#define 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
+ integer number of semitones.
+
+ Pitch is lexicographically ordered by (octave, notename,
+ alteration).
-/** A "tonal" pitch. This is a pitch as it figures in diatonal western
- music (12 semitones in an octave), as opposed to a frequence in Hz
- or a integer number of semitones.
-
*/
class Pitch
{
-public: // fixme
- /*
- TODO: use SCM -- (make private?)
- */
-
- /// 0 is c, 6 is b
- int notename_i_;
-
- /// 0 natural, 1 sharp, etc
- int alteration_i_;
-
- /// 0 is central c
- int octave_i_;
- /*
- mutators, so JUNKME.
- */
+private:
+ int octave_;
+ int notename_;
+ Rational alteration_;
+ Scale *scale_;
+
void transpose (Pitch);
void up_to (int);
void down_to (int);
+ void normalize_octave ();
+ void normalize_alteration ();
+ void normalize ();
public:
+ int get_octave () const;
+ int get_notename () const;
+ Rational get_alteration () const;
- int octave_i () const;
- int notename_i () const;
- int alteration_i () const;
-
- /*
- Pitch is lexicographically ordered by (octave, notename,
- alteration).
- */
- Pitch (int octave, int notename,int accidental);
+ Pitch (int octave, int notename, Rational accidental);
+ Pitch (int octave, int notename);
Pitch ();
- Pitch to_relative_octave (Pitch);
+ Pitch transposed (Pitch) const;
+ Pitch to_relative_octave (Pitch) const;
- static int compare (Pitch const&,Pitch const&);
- /// return large part of interval from central c
- int steps() const;
- /// return pitch from central c (in halfnotes)
- int semitone_pitch() const;
- String str () const;
+ static int compare (Pitch const &, Pitch const &);
- static SCM transpose (SCM p, SCM delta);
+ int steps () const;
+ Rational tone_pitch () const;
+ int rounded_semitone_pitch () const;
+ int rounded_quartertone_pitch () const;
+ Pitch negated () const;
+ string to_string () const;
- SCM smobbed_copy () const;
- DECLARE_SCHEME_CALLBACK(less_p, (SCM a, SCM b));
- DECLARE_SIMPLE_SMOBS(Pitch,);
+ DECLARE_SCHEME_CALLBACK (less_p, (SCM a, SCM b));
+ DECLARE_SIMPLE_SMOBS (Pitch);
+};
+enum {
+ DOUBLE_FLAT = -4,
+ THREE_Q_FLAT,
+ FLAT,
+ SEMI_FLAT,
+ NATURAL,
+ SEMI_SHARP,
+ SHARP,
+ THREE_Q_SHARP,
+ DOUBLE_SHARP,
};
-Pitch* unsmob_pitch (SCM);
+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;
-#include "compare.hh"
-INSTANTIATE_COMPARE(Pitch, Pitch::compare);
+SCM ly_pitch_diff (SCM pitch, SCM root);
+SCM ly_pitch_transpose (SCM p, SCM delta);
+DECLARE_UNSMOB (Pitch, pitch);
-int compare (Array<Pitch>*, Array<Pitch>*);
+INSTANTIATE_COMPARE (Pitch, Pitch::compare);
-#endif /* MUSICAL_PITCH_HH */
+extern SCM pitch_less_proc;
+Pitch pitch_interval (Pitch const &from, Pitch const &to);
+#endif /* MUSICAL_PITCH_HH */