-/*
- chord.cc -- implement Chord
-
- source file of the GNU LilyPond music typesetter
-
- (c) 1999--2003 Jan Nieuwenhuizen <janneke@gnu.org>
-*/
-
-#include "chord.hh"
-#include "event.hh"
-#include "warn.hh"
-
-#include "music-list.hh"
-#include "event.hh"
-
-
-SCM
-Chord::base_pitches (SCM tonic)
-{
- SCM base = SCM_EOL;
-
- SCM major = Pitch (0, 2, 0).smobbed_copy ();
- SCM minor = Pitch (0, 2, -1).smobbed_copy ();
-
- base = gh_cons (tonic, base);
- base = gh_cons (ly_pitch_transpose (ly_car (base), major), base);
- base = gh_cons (ly_pitch_transpose (ly_car (base), minor), base);
-
- return scm_reverse_x (base, SCM_EOL);
-}
-
-SCM
-Chord::transpose_pitches (SCM tonic, SCM pitches)
-{
- /* map?
- hoe doe je lambda in C?
- */
- SCM transposed = SCM_EOL;
- for (SCM i = pitches; gh_pair_p (i); i = ly_cdr (i))
- {
- transposed = gh_cons (ly_pitch_transpose (tonic, ly_car (i)),
- transposed);
- }
- return scm_reverse_x (transposed, SCM_EOL);
-}
-
-/*
- burp, in SCM duw je gewoon een (if (= (step x) 7) (...)) door pitches
-
- Lower step STEP.
- If step == 0, lower all.
- */
-SCM
-Chord::lower_step (SCM tonic, SCM pitches, SCM step)
-{
- SCM lowered = SCM_EOL;
- for (SCM i = pitches; gh_pair_p (i); i = ly_cdr (i))
- {
- SCM p = ly_car (i);
- if (gh_equal_p (step_scm (tonic, ly_car (i)), step)
- || gh_scm2int (step) == 0)
- {
- p = ly_pitch_transpose (p, Pitch (0, 0, -1).smobbed_copy ());
- }
- lowered = gh_cons (p, lowered);
- }
- return scm_reverse_x (lowered, SCM_EOL);
-}
-
-/* Return member that has same notename, disregarding octave or alterations */
-SCM
-Chord::member_notename (SCM p, SCM pitches)
-{
- /* If there's an exact match, make sure to return that */
- SCM member = gh_member (p, pitches);
- if (member == SCM_BOOL_F)
- {
- for (SCM i = pitches; gh_pair_p (i); i = ly_cdr (i))
- {
- /*
- Urg, eindelijk gevonden: () != #f, kan maar niet aan wennen.
- Anders kon iets korter...
- */
- if (unsmob_pitch (p)->get_notename ()
- == unsmob_pitch (ly_car (i))->get_notename ())
- {
- member = ly_car (i);
- break;
- }
- }
- }
- else
- member = ly_car (member);
- return member;
-}
-
-/* Return member that has same notename and alteration, disregarding octave */
-SCM
-Chord::member_pitch (SCM p, SCM pitches)
-{
- /* If there's an exact match, make sure to return that */
- SCM member = gh_member (p, pitches);
- if (member == SCM_BOOL_F)
- {
- for (SCM i = pitches; gh_pair_p (i); i = ly_cdr (i))
- {
- if (unsmob_pitch (p)->get_notename ()
- == unsmob_pitch (ly_car (i))->get_notename ()
- && unsmob_pitch (p)->get_alteration()
- == unsmob_pitch (ly_car (i))->get_alteration())
- {
- member = ly_car (i);
- break;
- }
- }
- }
- else
- member = ly_car (member);
- return member;
-}
-
-SCM
-Chord::step_scm (SCM tonic, SCM p)
-{
- /* De Pitch intervaas is nog beetje sleutelgat? */
- int i = unsmob_pitch (p)->get_notename ()
- - unsmob_pitch (tonic)->get_notename ()
- + (unsmob_pitch (p)->get_octave ()
- - unsmob_pitch (tonic)->get_octave ()) * 7;
- while (i < 0)
- i += 7;
- i++;
- return scm_int2num (i);
-}
-
-/*
- Assuming that PITCHES is a chord, with tonic (CAR PITCHES), find
- missing thirds, only considering notenames. Eg, for
-
- PITCHES = c gis d'
-
- return
-
- MISSING = e b'
-
-*/
-SCM
-Chord::missing_thirds (SCM pitches)
-{
- SCM thirds = SCM_EOL;
-
- /* is the third c-e, d-f, etc. small or large? */
- int minormajor_a[] = {0, -1, -1, 0, 0, -1, -1};
- for (int i=0; i < 7; i++)
- thirds = gh_cons (Pitch (0, 2, minormajor_a[i]).smobbed_copy (),
- thirds);
- thirds = scm_vector (scm_reverse_x (thirds, SCM_EOL));
-
- SCM tonic = ly_car (pitches);
- SCM last = tonic;
- SCM missing = SCM_EOL;
-
- for (SCM i = pitches; gh_pair_p (i);)
- {
- SCM p = ly_car (i);
- int step = gh_scm2int (step_scm (tonic, p));
-
- if (unsmob_pitch (last)->get_notename () == unsmob_pitch (p)->get_notename ())
- {
- int third = (unsmob_pitch (last)->get_notename ()
- - unsmob_pitch (tonic)-> get_notename () + 7) % 7;
- last = ly_pitch_transpose (last, scm_vector_ref (thirds, scm_int2num (third)));
- }
-
- if (step > gh_scm2int (step_scm (tonic, last)))
- {
- while (step > gh_scm2int (step_scm (tonic, last)))
- {
- missing = gh_cons (last, missing);
- int third = (unsmob_pitch (last)->get_notename ()
- - unsmob_pitch (tonic)->get_notename () + 7) % 7;
- last = ly_pitch_transpose (last, scm_vector_ref (thirds,
- scm_int2num (third)));
- }
- }
- else
- {
- i = ly_cdr (i);
- }
- }
-
- return lower_step (tonic, missing, scm_int2num (7));
-}
-
-/* Return PITCHES with PITCH added not as lowest note */
-SCM
-Chord::add_above_tonic (SCM pitch, SCM pitches)
-{
- /* Should we maybe first make sure that PITCH is below tonic? */
- if (pitches != SCM_EOL)
- while (Pitch::less_p (pitch, ly_car (pitches)) == SCM_BOOL_T)
- pitch = ly_pitch_transpose (pitch, Pitch (1, 0, 0).smobbed_copy ());
-
- pitches = gh_cons (pitch, pitches);
- return scm_sort_list (pitches, Pitch::less_p_proc);
-}
-
-/* Return PITCHES with PITCH added as lowest note */
-SCM
-Chord::add_below_tonic (SCM pitch, SCM pitches)
-{
- if (pitches != SCM_EOL)
- while (Pitch::less_p (ly_car (pitches), pitch) == SCM_BOOL_T)
- pitch = ly_pitch_transpose (pitch, Pitch (-1, 0, 0).smobbed_copy ());
- return gh_cons (pitch, pitches);
-}
-
-
-
-/*
- Parser stuff
-
- Construct from parser output:
-
- PITCHES is the plain chord, it does not include bass or inversion
-
- Part of Chord:: namespace for now, because we do lots of
- chord-manipulating stuff.
-*/
-SCM
-Chord::tonic_add_sub_to_pitches (SCM tonic, SCM add, SCM sub)
-{
- /* urg: catch dim modifier: 3rd, 5th, 7th, .. should be lowered */
- bool dim_b = false;
- for (SCM i = add; gh_pair_p (i); i = ly_cdr (i))
- {
- Pitch* p = unsmob_pitch (ly_car (i));
- /* Ugr
- This chord modifier stuff should really be fixed
- Cmaj7 yields C 7/7-
- */
- if (p->get_octave () == -100)
- {
- dim_b = true;
- Pitch t (0, p->get_notename(), p->get_alteration());
- gh_set_car_x (i, t.smobbed_copy());
- dim_b = true;
- }
- }
-
- add = transpose_pitches (tonic, add);
- add = lower_step (tonic, add, scm_int2num (7));
- add = scm_sort_list (add, Pitch::less_p_proc);
- add = ly_unique (add);
-
- sub = transpose_pitches (tonic, sub);
- sub = lower_step (tonic, sub, scm_int2num (7));
- sub = scm_sort_list (sub, Pitch::less_p_proc);
-
- /* default chord includes upto 5: <1, 3, 5> */
- add = gh_cons (tonic, add);
- SCM tmp = add;
-
- SCM fifth = ly_last (base_pitches (tonic));
- int highest_step = gh_scm2int (step_scm (tonic, ly_last (tmp)));
- if (highest_step < 5)
- tmp = ly_snoc (fifth, tmp);
- else if (dim_b)
- {
- add = lower_step (tonic, add, scm_int2num (5));
- add = lower_step (tonic, add, scm_int2num (7));
- }
-
- /* find missing thirds */
- SCM missing = missing_thirds (tmp);
- if (highest_step < 5)
- missing = ly_snoc (fifth, missing);
-
- /* if dim modifier is given: lower all missing */
- if (dim_b)
- missing = lower_step (tonic, missing, scm_int2num (0));
-
- /* if additions include any 3, don't add third */
- SCM third = ly_cadr (base_pitches (tonic));
- if (member_notename (third, add) != SCM_BOOL_F)
- missing = scm_delete (third, missing);
-
- /* if additions include any 4, assume sus4 and don't add third implicitely
- C-sus (4) = c f g (1 4 5) */
- SCM sus = ly_pitch_transpose (tonic, Pitch (0, 3, 0).smobbed_copy ());
- if (member_notename (sus, add) != SCM_BOOL_F)
- missing = scm_delete (third, missing);
-
- /* if additions include some 5, don't add fifth */
- if (member_notename (fifth, add) != SCM_BOOL_F)
- missing = scm_delete (fifth, missing);
-
- /* complete the list of thirds to be added */
- add = gh_append2 (missing, add);
- add = scm_sort_list (add, Pitch::less_p_proc);
-
- SCM pitches = SCM_EOL;
- /* Add all that aren't subtracted */
- for (SCM i = add; gh_pair_p (i); i = ly_cdr (i))
- {
- SCM p = ly_car (i);
- SCM s = member_notename (p, sub);
- if (s != SCM_BOOL_F)
- sub = scm_delete (s, sub);
- else
- pitches = gh_cons (p, pitches);
- }
- pitches = scm_sort_list (pitches, Pitch::less_p_proc);
-
- for (SCM i = sub; gh_pair_p (i); i = ly_cdr (i))
- warning (_f ("invalid subtraction: not part of chord: %s",
- unsmob_pitch (ly_car (i))->to_string ()));
-
- return pitches;
-}
-
-
-/* --Het lijkt me dat dit in het paarse gedeelte moet. */
-Music *
-Chord::get_chord (SCM tonic, SCM add, SCM sub, SCM inversion, SCM bass, SCM dur)
-{
- SCM pitches = tonic_add_sub_to_pitches (tonic, add, sub);
- SCM list = SCM_EOL;
- if (inversion != SCM_EOL)
- {
- /* If inversion requested, check first if the note is part of chord */
- SCM s = member_pitch (inversion, pitches);
- if (s != SCM_BOOL_F)
- {
- /* Then, delete and add as base note, ie: the inversion */
- pitches = scm_delete (s, pitches);
- Music * n = make_music_by_name (ly_symbol2scm ("NoteEvent"));
- n->set_mus_property ("pitch", ly_car (add_below_tonic (s, pitches)));
- n->set_mus_property ("duration", dur);
- n->set_mus_property ("inversion", SCM_BOOL_T);
- list = gh_cons (n->self_scm (), list);
- scm_gc_unprotect_object (n->self_scm ());
- }
- else
- warning (_f ("invalid inversion pitch: not part of chord: %s",
- unsmob_pitch (inversion)->to_string ()));
- }
-
- /* Bass is easy, just add if requested */
- if (bass != SCM_EOL)
- {
- Music * n = make_music_by_name (ly_symbol2scm ("NoteEvent"));
- n->set_mus_property ("pitch", ly_car (add_below_tonic (bass, pitches)));
- n->set_mus_property ("duration", dur);
- n->set_mus_property ("bass", SCM_BOOL_T);
- list = gh_cons (n->self_scm (), list);
- scm_gc_unprotect_object (n->self_scm ());
- }
-
- for (SCM i = pitches; gh_pair_p (i); i = ly_cdr (i))
- {
- Music * n = make_music_by_name(ly_symbol2scm ("NoteEvent"));
- n->set_mus_property ("pitch", ly_car (i));
- n->set_mus_property ("duration", dur);
- list = gh_cons (n->self_scm (), list);
- scm_gc_unprotect_object (n->self_scm ());
- }
-
- Music * v = make_music_by_name(ly_symbol2scm ("EventChord"));
- v->set_mus_property ("elements", list);
-
- return v;
-}
-
+// duh
projects / lilypond.git / blobdiff