/*
- musical-pitch.cc -- implement Pitch
+ This file is part of LilyPond, the GNU music typesetter.
- source file of the GNU LilyPond music typesetter
+ Copyright (C) 1998--2014 Han-Wen Nienhuys <hanwen@xs4all.nl>
- (c) 1998--2005 Han-Wen Nienhuys <hanwen@cs.uu.nl>
+ LilyPond 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 3 of the License, or
+ (at your option) any later version.
+
+ LilyPond 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 LilyPond. If not, see <http://www.gnu.org/licenses/>.
*/
#include "pitch.hh"
-#include "warn.hh"
+
#include "main.hh"
+#include "scale.hh"
+#include "string-convert.hh"
+#include "warn.hh"
#include "ly-smobs.icc"
+#include <cmath>
-Pitch::Pitch (int o, int n, int a)
+Pitch::Pitch (int o, int n, Rational a)
{
notename_ = n;
alteration_ = a;
octave_ = o;
- normalise ();
+ scale_ = default_global_scale;
+ normalize_octave ();
}
/* FIXME: why is octave == 0 and default not middleC ? */
Pitch::Pitch ()
{
notename_ = 0;
- alteration_ = 0;
+ scale_ = default_global_scale;
octave_ = 0;
+ alteration_ = (Rational)0;
}
int
{
int o = m1.octave_ - m2.octave_;
int n = m1.notename_ - m2.notename_;
- int a = m1.alteration_ - m2.alteration_;
+ Rational a = m1.alteration_ - m2.alteration_;
if (o)
return o;
if (n)
return n;
if (a)
- return a;
+ return a > (Rational)0 ? 1 : -1;
+
return 0;
}
int
Pitch::steps () const
{
- return notename_ + octave_*7;
+ return notename_ + octave_ * scale_->step_count ();
}
-/* Should be settable from input? */
-static Byte diatonic_scale_semitones[ ] = { 0, 2, 4, 5, 7, 9, 11 };
+Rational
+Pitch::tone_pitch () const
+{
+ return scale_->tones_at_step (notename_, octave_) + alteration_;
+}
/* Calculate pitch height in 12th octave steps. Don't assume
- normalised pitch as this function is used to normalise the pitch. */
+ normalized pitch as this function is used to normalize the pitch. */
int
-Pitch::semitone_pitch () const
+Pitch::rounded_semitone_pitch () const
{
- int o = octave_;
- int n = notename_;
- while (n < 0)
- {
- n += 7;
- o--;
- }
-
- if (alteration_ % 2)
- programming_error ("semitone_pitch () called on quarter tone alteration.");
-
- return ((o + n / 7) * 12
- + diatonic_scale_semitones[n % 7]
- + (alteration_ / 2));
+ return int (floor (double (tone_pitch () * Rational (2) + Rational (1, 2))));
}
int
-Pitch::quartertone_pitch () const
+Pitch::rounded_quartertone_pitch () const
{
- int o = octave_;
- int n = notename_;
- while (n < 0)
- {
- n += 7;
- o--;
- }
+ return int (floor (double (tone_pitch () * Rational (4) + Rational (1, 2))));
+}
- return ((o + n / 7) * 24
- + 2 * diatonic_scale_semitones[n % 7]
- + alteration_);
+void
+Pitch::normalize_octave ()
+{
+ int normalized_step = notename_ % scale_->step_count ();
+ if (normalized_step < 0)
+ normalized_step += scale_->step_count ();
+
+ octave_ += (notename_ - normalized_step) / scale_->step_count ();
+ notename_ = normalized_step;
}
void
-Pitch::normalise ()
+Pitch::normalize_alteration ()
{
- int pitch = quartertone_pitch ();
- while (notename_ >= 7)
- {
- notename_ -= 7;
- octave_++;
- alteration_ -= quartertone_pitch () - pitch;
- }
- while (notename_ < 0)
+ while (alteration_ > Rational (1))
{
- notename_ += 7;
- octave_--;
- alteration_ -= quartertone_pitch () - pitch;
+ alteration_ -= scale_->step_size (notename_);
+ notename_++;
}
- while (alteration_ > DOUBLE_SHARP)
+ while (alteration_ < Rational (-1))
{
- if (notename_ == 6)
- {
- notename_ = 0;
- octave_++;
- }
- else
- notename_++;
-
- alteration_ = 0;
- alteration_ -= quartertone_pitch () - pitch;
+ notename_--;
+ alteration_ += scale_->step_size (notename_);
}
+}
- while (alteration_ < DOUBLE_FLAT)
- {
- if (notename_ == 0)
- {
- notename_ = 6;
- octave_--;
- }
- else
- notename_--;
-
- alteration_ = 0;
- alteration_ -= quartertone_pitch () - pitch;
- }
+void
+Pitch::normalize ()
+{
+ normalize_alteration ();
+ normalize_octave ();
}
-/* WHugh, wat een intervaas */
void
Pitch::transpose (Pitch delta)
{
- int new_semi = quartertone_pitch () +delta.quartertone_pitch ();
+ Rational new_alter = tone_pitch () + delta.tone_pitch ();
+
octave_ += delta.octave_;
notename_ += delta.notename_;
- alteration_ += new_semi - quartertone_pitch ();
+ alteration_ += new_alter - tone_pitch ();
- normalise ();
+ normalize_octave ();
}
Pitch
pitch_interval (Pitch const &from, Pitch const &to)
{
- int sound = to.quartertone_pitch () - from.quartertone_pitch ();
+ Rational sound = to.tone_pitch () - from.tone_pitch ();
Pitch pt (to.get_octave () - from.get_octave (),
- to.get_notename () - from.get_notename (),
+ to.get_notename () - from.get_notename (),
- to.get_alteration () - from.get_alteration ());
+ to.get_alteration () - from.get_alteration ());
- return pt.transposed (Pitch (0, 0, sound - pt.quartertone_pitch ()));
+ return pt.transposed (Pitch (0, 0, sound - pt.tone_pitch ()));
}
/* FIXME
Merge with *pitch->text* funcs in chord-name.scm */
char const *accname[] = {"eses", "eseh", "es", "eh", "",
- "ih", "is", "isih", "isis"};
+ "ih", "is", "isih", "isis"
+ };
-String
+string
Pitch::to_string () const
{
- int n = (notename_ + 2) % 7;
- String s = ::to_string (char (n + 'a'));
- if (alteration_)
- s += String (accname[alteration_ - DOUBLE_FLAT]);
+ int n = (notename_ + 2) % scale_->step_count ();
+ string s = ::to_string (char (n + 'a'));
+ Rational qtones = alteration_ * Rational (4, 1);
+ int qt = int (rint (Real (qtones)));
+ s += string (accname[qt + 4]);
if (octave_ >= 0)
{
int o = octave_ + 1;
while (o--)
- s += "'";
+ s += "'";
}
else if (octave_ < 0)
{
int o = (-octave_) - 1;
while (o--)
- s += ::to_string (',');
+ s += ::to_string (',');
}
return s;
}
IMPLEMENT_TYPE_P (Pitch, "ly:pitch?");
-
SCM
-Pitch::mark_smob (SCM)
+Pitch::mark_smob (SCM x)
{
- return SCM_EOL;
+ Pitch *p = (Pitch *) SCM_CELL_WORD_1 (x);
+ return p->scale_->self_scm ();
}
IMPLEMENT_SIMPLE_SMOBS (Pitch);
{
Pitch *r = (Pitch *) SCM_CELL_WORD_1 (s);
scm_puts ("#<Pitch ", port);
- scm_display (scm_makfrom0str (r->to_string ().to_str0 ()), port);
+ scm_display (ly_string2scm (r->to_string ()), port);
scm_puts (" >", port);
return 1;
}
Pitch *q = (Pitch *) SCM_CELL_WORD_1 (b);
bool eq = p->notename_ == q->notename_
- && p->octave_ == q->octave_
- && p->alteration_ == q->alteration_;
+ && p->octave_ == q->octave_
+ && p->alteration_ == q->alteration_;
return eq ? SCM_BOOL_T : SCM_BOOL_F;
}
return notename_;
}
-int
+Rational
Pitch::get_alteration () const
{
return alteration_;
p.transpose (d);
return p;
}
+
+Pitch
+Pitch::normalized () const
+{
+ Pitch p = *this;
+ p.normalize ();
+ return p;
+}
+
+Rational NATURAL_ALTERATION (0);
+Rational FLAT_ALTERATION (-1, 2);
+Rational DOUBLE_FLAT_ALTERATION (-1);
+Rational SHARP_ALTERATION (1, 2);
+
+Pitch
+Pitch::negated () const
+{
+ return pitch_interval (*this, Pitch ());
+}
projects / lilypond.git / blobdiff