X-Git-Url: https://git.donarmstrong.com/?a=blobdiff_plain;f=lily%2Fpitch.cc;h=dd82af2f63453bb5f9a65632d5bb0c176bf3fd0c;hb=38e1cad48d14f0b0f9286b4bb8891051a5f82d1e;hp=d4f9aae48f8c233b395093093ef28863790605d7;hpb=b5b00b10f242e4d22e352c8a0d61c384bf205277;p=lilypond.git diff --git a/lily/pitch.cc b/lily/pitch.cc index d4f9aae48f..dd82af2f63 100644 --- a/lily/pitch.cc +++ b/lily/pitch.cc @@ -1,211 +1,194 @@ -/* - musical-pitch.cc -- implement Pitch - - source file of the GNU LilyPond music typesetter - - (c) 1998--2003 Han-Wen Nienhuys - - */ +/* + This file is part of LilyPond, the GNU music typesetter. + + Copyright (C) 1998--2012 Han-Wen Nienhuys + + 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 . +*/ + #include "pitch.hh" -#include "warn.hh" -#include "main.hh" -#include "ly-smobs.icc" +#include "main.hh" +#include "scale.hh" +#include "string-convert.hh" +#include "warn.hh" +#include "ly-smobs.icc" +#include -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 Pitch::compare (Pitch const &m1, Pitch const &m2) { - int o= m1.octave_ - m2.octave_; + 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; + return o; if (n) - return n; + return n; if (a) - return a; + return a > (Rational)0; + 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 ("Calling semitone_pitch() for quarter tone alterations."); - - } - - 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 (o + n / 7) * 24 + 2* diatonic_scale_semitones[n % 7] + (alteration_); + return int (floor (double (tone_pitch () * Rational (4) + Rational (1, 2)))); } void -Pitch::normalise () +Pitch::normalize_octave () { - int pitch = quartertone_pitch (); - while (notename_ >= 7) - { - notename_ -= 7; - octave_++; - alteration_ -= quartertone_pitch () - pitch; - } - while (notename_ < 0) - { - notename_ += 7; - octave_--; - alteration_ -= quartertone_pitch () - pitch; - } - while (alteration_ > DOUBLE_SHARP) + 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::normalize_alteration () +{ + while (alteration_ > Rational (1)) { - if (notename_ == 6) - { - notename_ = 0; - octave_++; - } - else - notename_++; - - alteration_ = 0; - alteration_ -= quartertone_pitch () - pitch; + alteration_ -= scale_->step_size (notename_); + notename_++; } - - while (alteration_ < DOUBLE_FLAT) + while (alteration_ < Rational (-1)) { - if (notename_ == 0) - { - notename_ = 6; - octave_--; - } - else - notename_--; - - alteration_ = 0; - alteration_ -= quartertone_pitch () - pitch; + notename_--; + alteration_ += scale_->step_size (notename_); } } -/* WHugh, wat een intervaas */ +void +Pitch::normalize () +{ + normalize_alteration (); + normalize_octave (); +} + 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 -interval (Pitch const & from , Pitch const & to ) +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 - */ + 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; } -/* - change me to relative, counting from last pitch p - return copy of resulting pitch - */ +/* Change me to relative, counting from last pitch p + return copy of resulting pitch. */ Pitch Pitch::to_relative_octave (Pitch p) const { - int oct_mod = octave_ + 1; // account for c' = octave 1 iso. 0 4 + /* account for c' = octave 1 iso. 0 4 */ + int oct_mod = octave_ + 1; Pitch up_pitch (p); Pitch down_pitch (p); up_pitch.alteration_ = alteration_; down_pitch.alteration_ = alteration_; - + Pitch n = *this; up_pitch.up_to (notename_); down_pitch.down_to (notename_); @@ -215,7 +198,7 @@ Pitch::to_relative_octave (Pitch p) const n = up_pitch; else n = down_pitch; - + n.octave_ += oct_mod; return n; } @@ -223,70 +206,47 @@ Pitch::to_relative_octave (Pitch p) const void Pitch::up_to (int notename) { - if (notename_ > notename) - { - octave_ ++; - } - notename_ = notename; + if (notename_ > notename) + octave_++; + notename_ = notename; } void Pitch::down_to (int notename) { if (notename_ < notename) - { - octave_ --; - } + octave_--; notename_ = notename; } - -LY_DEFINE(ly_pitch_transpose, - "ly:pitch-transpose", 2, 0, 0, - (SCM p, SCM delta), - "Transpose @var{p} by the amount @var{delta}, where @var{delta} is the " -" pitch that central C is transposed to.") -{ - Pitch* t = unsmob_pitch (p); - Pitch *d = unsmob_pitch (delta); - SCM_ASSERT_TYPE(t, p, SCM_ARG1, __FUNCTION__, "pitch") ; - SCM_ASSERT_TYPE(d, delta, SCM_ARG1, __FUNCTION__, "pitch") ; - - return t->transposed (*d).smobbed_copy (); -} - -/****************************************************************/ - 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); int Pitch::print_smob (SCM s, SCM port, scm_print_state *) { - Pitch *r = (Pitch *) ly_cdr (s); - + Pitch *r = (Pitch *) SCM_CELL_WORD_1 (s); scm_puts ("#to_string ().to_str0 ()), port); + scm_display (ly_string2scm (r->to_string ()), port); scm_puts (" >", port); - return 1; } SCM -Pitch::equal_p (SCM a , SCM b) +Pitch::equal_p (SCM a, SCM b) { - Pitch *p = (Pitch *) ly_cdr (a); - Pitch *q = (Pitch *) ly_cdr (b); + Pitch *p = (Pitch *) SCM_CELL_WORD_1 (a); + 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; } @@ -304,129 +264,8 @@ Pitch::less_p (SCM p1, SCM p2) return SCM_BOOL_F; } -/* - should add optional args - */ - -LY_DEFINE(make_pitch, "ly:make-pitch", 3, 0, 0, - (SCM o, SCM n, SCM a), - "@var{octave} is specified by an integer, zero for the octave containing " - "middle C. @var{note} is a number from 0 to 6, with 0 corresponding to C " - "and 6 corresponding to B. The shift is zero for a natural, negative for " - "flats, or positive for sharps. ") -{ - SCM_ASSERT_TYPE(gh_number_p (o), o, SCM_ARG1, __FUNCTION__, "number"); - SCM_ASSERT_TYPE(gh_number_p (n), n, SCM_ARG2, __FUNCTION__, "number"); - SCM_ASSERT_TYPE(gh_number_p (a), a, SCM_ARG3, __FUNCTION__, "number"); - - Pitch p (gh_scm2int (o), gh_scm2int (n), gh_scm2int (a)); - return p.smobbed_copy (); -} - -LY_DEFINE(pitch_steps, "ly:pitch-steps", 1, 0,0, - (SCM p), - "Number of steps counted from central C of the pitch @var{p}.") -{ - Pitch *pp = unsmob_pitch (p); - SCM_ASSERT_TYPE(pp, p, SCM_ARG1, __FUNCTION__, "Pitch"); - - return gh_int2scm (pp->steps()); -} - -LY_DEFINE(pitch_octave, "ly:pitch-octave", 1, 0, 0, - (SCM pp), - "extract the octave from pitch @var{p}.") -{ - Pitch *p = unsmob_pitch (pp); - SCM_ASSERT_TYPE(p, pp, SCM_ARG1, __FUNCTION__, "Pitch"); - int q = p->get_octave (); - - return gh_int2scm (q); -} - -LY_DEFINE(pitch_alteration, "ly:pitch-alteration", 1, 0, 0, - (SCM pp), - "extract the alteration from pitch @var{p}.") -{ - Pitch *p = unsmob_pitch (pp); - SCM_ASSERT_TYPE(p, pp, SCM_ARG1, __FUNCTION__, "Pitch"); - int q = p->get_alteration (); - - return gh_int2scm (q); -} - -LY_DEFINE(pitch_notename, "ly:pitch-notename", 1, 0, 0, - (SCM pp), - "extract the note name from pitch @var{pp}.") -{ - Pitch *p = unsmob_pitch (pp); - SCM_ASSERT_TYPE(p, pp, SCM_ARG1, __FUNCTION__, "Pitch"); - int q = p->get_notename (); - - return gh_int2scm (q); -} - -LY_DEFINE(ly_pitch_quartertones, "ly:pitch-quartertones", 1, 0, 0, - (SCM pp), - "calculate the number of semitones of @var{p} from central C.") -{ - Pitch *p = unsmob_pitch (pp); - SCM_ASSERT_TYPE(p, pp, SCM_ARG1, __FUNCTION__, "Pitch"); - - int q = p->quartertone_pitch (); - - return gh_int2scm (q); -} - -LY_DEFINE(ly_pitch_semitones, "ly:pitch-semitones", 1, 0, 0, - (SCM pp), - "calculate the number of semitones of @var{p} from central C.") -{ - Pitch *p = unsmob_pitch (pp); - SCM_ASSERT_TYPE(p, pp, SCM_ARG1, __FUNCTION__, "Pitch"); - - int q = p->semitone_pitch (); - - return gh_int2scm (q); -} - -LY_DEFINE(pitch_less, "ly:pitchsmobbed_self (); -} - int -Pitch::get_octave ()const +Pitch::get_octave () const { return octave_; } @@ -437,7 +276,7 @@ Pitch::get_notename () const return notename_; } -int +Rational Pitch::get_alteration () const { return alteration_; @@ -446,7 +285,26 @@ Pitch::get_alteration () const Pitch Pitch::transposed (Pitch d) const { - Pitch p =*this; + Pitch p = *this; 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 ()); +}