-/*
- chord.cc -- implement Chord
- source file of the GNU LilyPond music typesetter
-
- (c) 1999 Jan Nieuwenhuizen <janneke@gnu.org>
-*/
-
-#include "chord.hh"
-#include "warn.hh"
-
-Chord::Chord (Array<Musical_pitch> pitch_arr)
-{
- pitch_arr_ = pitch_arr;
-}
-
-// construct from parser output
-// urg: should split this up into understandable chunks
-Chord::Chord (Musical_pitch tonic, Array<Musical_pitch>* add_arr_p, Array<Musical_pitch>* sub_arr_p, Musical_pitch* inversion_p)
-{
- for (int i = 0; i < add_arr_p->size (); i++)
- {
- Musical_pitch p = tonic;
- Musical_pitch q = (*add_arr_p)[i];
- // duh, c7 should mean <c bes>
- if (q.notename_i_ == 6)
- q.accidental_i_--;
- p.transpose (q);
- (*add_arr_p)[i] = p;
- }
- add_arr_p->sort (Musical_pitch::compare);
- for (int i = 0; i < sub_arr_p->size (); i++)
- {
- Musical_pitch p = tonic;
- Musical_pitch q = (*sub_arr_p)[i];
- // duh, c7 should mean <c bes>
- if (q.notename_i_ == 6)
- q.accidental_i_--;
- p.transpose (q);
- (*sub_arr_p)[i] = p;
- }
- sub_arr_p->sort (Musical_pitch::compare);
-
- Musical_pitch third (2);
- Musical_pitch mthird (2, -1);
- Musical_pitch missing;
- missing = tonic;
- missing.transpose (third);
-
- Musical_pitch p;
- p = tonic;
- p.transpose (third);
- p.transpose (mthird);
-
- /*
- must have minimum at 5 (3 is added automatically as missing)
- */
- if (!add_arr_p->size ())
- add_arr_p->push (p);
- else if ((add_arr_p->top () < p) && (add_arr_p->top ().notename_i_ != p.notename_i_))
- add_arr_p->push (p);
- add_arr_p->sort (Musical_pitch::compare);
-
- Array<Musical_pitch> triads;
- triads.push (third); // c e
- triads.push (mthird); // d f
- triads.push (mthird); // e g
- triads.push (third); // f a
- triads.push (third); // g b
- triads.push (mthird); // a c
- triads.push (mthird); // b d
-
- /*
- if first addition is 4, assume sus4 and don't add third implicitely
- */
- Musical_pitch sus (3);
- sus.transpose (tonic);
- if (add_arr_p->size ())
- if ((*add_arr_p)[0] == sus)
- missing.transpose (mthird);
-
- /*
- add missing triads
- */
- for (int i = 0; i < add_arr_p->size ();)
- {
- Musical_pitch p = (*add_arr_p)[i];
- if (p > missing)
- while (p > missing)
- {
- if (p.notename_i_ != missing.notename_i_)
- {
- if ((missing.notename_i_ - tonic.notename_i_ + 7) % 7 == 6)
- {
- Musical_pitch special_seven = missing;
- Musical_pitch lower (0, -1);
- special_seven.transpose (lower);
- add_arr_p->insert (special_seven, i++);
- }
- else
- add_arr_p->insert (missing, i++);
- }
- missing.transpose (triads[(missing.notename_i_ - tonic.notename_i_ + 7) % 7]);
- }
- else if (p.notename_i_ == missing.notename_i_)
- missing.transpose (triads[(missing.notename_i_ - tonic.notename_i_ + 7) % 7]);
- else
- i++;
- }
-
- /*
- add tonic
- */
- if (!add_arr_p->size () || ((*add_arr_p)[0] != tonic))
- add_arr_p->insert (tonic, 0);
-
- /*
- add all that aren't subtracted
- */
- for (int i = 0; i < add_arr_p->size (); i++)
- {
- Musical_pitch p = (*add_arr_p)[i];
- int j = 0;
- for (; j < sub_arr_p->size (); j++)
- if (p == (*sub_arr_p)[j])
- {
- sub_arr_p->del (j);
- j = -1;
- break;
- }
- if (j == sub_arr_p->size ())
- pitch_arr_.push (p);
- }
-
- for (int i = 0; i < sub_arr_p->size (); i++)
- warning (_f ("invalid subtraction: not part of chord: %s",
- (*sub_arr_p)[i].str ()));
-
- if (inversion_p)
- {
- int i = 0;
- for (; i < pitch_arr_.size (); i++)
- if ((pitch_arr_[i].notename_i_ == inversion_p->notename_i_)
- && (pitch_arr_[i].accidental_i_ == inversion_p->accidental_i_))
- break;
- if (i == pitch_arr_.size ())
- warning (_f ("invalid inversion pitch: not part of chord: %s",
- inversion_p->str ()));
- else
- {
- /*
- urg
- should be run-time switchable "chordInversionPreserve", howto?
-
- there are two ways commonly used to rearrange a chord with
- an inversion:
-
- 1. rebuild pitch list, taking inversion as base
- */
-#if 0
- rebuild_from_base (i);
-#else
- /*
- or
- 2. insert inversion as lowest (at first position)
- */
- rebuild_with_bass (i);
-#endif
- }
- delete inversion_p;
- }
-}
-
-String
-Chord::banter_str (Musical_pitch* inversion) const
-{
- Musical_pitch tonic = pitch_arr_[0];
-
- Array<Musical_pitch> scale;
- scale.push (Musical_pitch (0)); // c
- scale.push (Musical_pitch (1)); // d
- scale.push (Musical_pitch (2)); // e
- scale.push (Musical_pitch (3)); // f
- scale.push (Musical_pitch (4)); // g
- scale.push (Musical_pitch (5)); // a
- // 7 always means 7-...
- scale.push (Musical_pitch (6, -1)); // b
-
-
- for (int i = 0; i < scale.size (); i++)
- scale[i].transpose (tonic);
-
- //urg, should do translation in scheme.
- char const *acc[] = {"\\textflat\\textflat ", "\\textflat ", "", "\\textsharp " , "\\textsharp\\textsharp "};
- String tonic_str = tonic.str ();
- tonic_str = tonic_str.left_str (1).upper_str ()
- + acc[tonic.accidental_i_ + 2];
-
- String add_str;
- String sub_str;
- String sep_str;
- String sub_sep_str;
- int last_trap = 1;
- for (int i=1; i < pitch_arr_.size (); i++)
- {
- Musical_pitch p = pitch_arr_[i];
- int trap = p.notename_i_ - tonic.notename_i_
- + (p.octave_i_ - tonic.octave_i_) * 7;
- while (trap < 0)
- trap += 7;
- trap++;
- while (trap - last_trap > 2)
- {
- last_trap += 2;
- sub_str += sub_sep_str + "no" + to_str (last_trap);
- sub_sep_str = "/";
- }
- last_trap = trap;
- int accidental = p.accidental_i_ - scale[(trap - 1) % 7].accidental_i_;
- if ((trap == 3) && (accidental == -1))
- tonic_str += "m"; // hmm
- else if (accidental || (!(trap % 2) || ((i + 1 == pitch_arr_.size ()) && (trap > 5))))
- {
- add_str += sep_str;
- if ((trap == 7) && (accidental == 1))
- add_str += "maj7";
- else
- {
- add_str += to_str (trap);
- if (accidental)
- add_str += accidental < 0 ? "-" : "+";
- // catch "C4/no3"; remove "no3"
- if (trap == 4)
- {
- int i = sub_str.index_i ("no3");
- if (i != -1)
- sub_str = sub_str.nomid_str (i, 3);
- if (!sub_str.length_i ())
- sub_sep_str = "";
- }
- }
- sep_str = "/";
- }
- }
-
- String inversion_str;
- if (inversion)
- {
- inversion_str = inversion->str ();
- inversion_str = "/" + inversion_str.left_str (1).upper_str ()
- + acc[tonic.accidental_i_ + 2];
-
- }
-
- if (sub_str.length_i ())
- sub_str = sep_str + sub_str;
- String str = tonic_str + "$^{" + add_str + sub_str + "}$" + inversion_str;
- return str;
-}
-
-int
-Chord::find_tonic_i () const
-{
- /*
- find tonic
-
- first try: base of longest line of triads
- */
- int tonic_i = 0;
- int longest_i = 0;
- for (int i = 0; i < pitch_arr_.size (); i++)
- {
- int no_triad_i = 0;
- int last_i = pitch_arr_[i % pitch_arr_.size ()].notename_i_;
- int j = 0;
- for (; j < pitch_arr_.size (); j++)
- {
- int cur_i = pitch_arr_[(i + j + 1) % pitch_arr_.size ()].notename_i_;
- int gap = cur_i - last_i;
- while (gap < 0)
- gap += 7;
- gap %= 7;
- if (gap == 2)
- last_i = cur_i;
- else
- no_triad_i++;
- }
- if (j - no_triad_i > longest_i)
- {
- longest_i = j - no_triad_i;
- tonic_i = i;
- }
- }
-
- /*
- second try: note after biggest gap
- */
- int biggest_i = 0;
- // if (longest_i)
- if (longest_i <= 1)
- for (int i = 0; i < pitch_arr_.size (); i++)
- {
- int gap = pitch_arr_[i].notename_i_
- - pitch_arr_[(i - 1 + pitch_arr_.size ())
- % pitch_arr_.size ()].notename_i_;
- while (gap < 0)
- gap += 7;
- gap %= 7;
- if (gap > biggest_i)
- {
- biggest_i = gap;
- tonic_i = i;
- }
- }
- return tonic_i;
-}
-
-void
-Chord::rebuild_from_base (int base_i)
-{
- Musical_pitch last (0, 0, -5);
- Array<Musical_pitch> new_arr;
- for (int i = 0; i < pitch_arr_.size (); i++)
- {
- Musical_pitch p = pitch_arr_[(base_i + i) % pitch_arr_.size ()];
- if (p < last)
- {
- p.octave_i_ = last.octave_i_;
- if (p < last)
- p.octave_i_++;
- }
- new_arr.push (p);
- last = p;
- }
- pitch_arr_ = new_arr;
-}
-
-void
-Chord::rebuild_insert_inversion (int tonic_i)
-{
- Musical_pitch inversion = pitch_arr_.get (0);
- rebuild_from_base (tonic_i - 1);
- if (pitch_arr_.size ())
- {
- inversion.octave_i_ = pitch_arr_[0].octave_i_ - 1;
- while (inversion < pitch_arr_[0])
- inversion.octave_i_++;
- }
- for (int i = 0; i < pitch_arr_.size (); i++)
- if (pitch_arr_[i] > inversion)
- {
- pitch_arr_.insert (inversion, i);
- break;
- }
-}
-
-void
-Chord::rebuild_with_bass (int bass_i)
-{
- Musical_pitch inversion = pitch_arr_.get (bass_i);
- // is lowering fine, or should others be raised?
- if (pitch_arr_.size ())
- while (inversion > pitch_arr_[0])
- inversion.octave_i_--;
- pitch_arr_.insert (inversion, 0);
-}
+// duh
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