-;; pitch: (notename . accidental)
-;; list: (list-of-pitches . (modifier-string . addition-subtraction-string))
+;;; chord.scm -- to be included in/to replace chord-name.scm
+;;; 2000 janneke@gnu.org
+;;;
-;; if a complete chord is found, use name
-;; if a chord's base triad is found (c e g), use name
+(use-modules
+ (ice-9 debug)
+ ;; urg, these two only to guess if a '/' is needed to separate
+ ;; user-chord-name and additions/subtractions
+ (ice-9 format)
+ (ice-9 regex)
+ )
-(define pitch-names-alist '())
-(set! pitch-names-alist
- (append
- '(
- ; use these for German naming
- ;((6 . 0) . ("H" ""))
- ;((6 . -1) . ("B" ("feta-1" . "\12")))
-
- ; urg, temp hack for accidental size: can't set from Chord::
- ((0 . 1) . ("C" ("feta-1" . "\10")))
- ((1 . 1) . ("D" ("feta-1" . "\10")))
- ((2 . 1) . ("E" ("feta-1" . "\10")))
- ((3 . 1) . ("F" ("feta-1" . "\10")))
- ((4 . 1) . ("G" ("feta-1" . "\10")))
- ((5 . 1) . ("A" ("feta-1" . "\10")))
- ((6 . 1) . ("B" ("feta-1" . "\10")))
-
- ((0 . -1) . ("C" ("feta-1" . "\12")))
- ((1 . -1) . ("D" ("feta-1" . "\12")))
- ((2 . -1) . ("E" ("feta-1" . "\12")))
- ((3 . -1) . ("F" ("feta-1" . "\12")))
- ((4 . -1) . ("G" ("feta-1" . "\12")))
- ((5 . -1) . ("A" ("feta-1" . "\12")))
- ((6 . -1) . ("B" ("feta-1" . "\12")))
- )
- pitch-names-alist))
+;; The regex module may not be available, or may be broken.
+(define use-regex
+ (let ((os (string-downcase (vector-ref (uname) 0))))
+ (not (equal? "cygwin" (substring os 0 (min 6 (string-length os)))))))
+
+;;
+;; (octave notename accidental)
+;;
+
+;;
+;; text: list of word
+;; word: string + optional list of property
+;; property: size, style, font, super, offset
+;;
+
+;; TODO
+;;
+;; * clean split of base/banter/american stuff
+;; * text definition is rather ad-hoc
+;; * do without format module
+;; * finish and check american names
+;; * make notename (tonic) configurable from mudela
+;; * fix append/cons stuff in inner-name-banter
+;;
-(define (user-pitch-name pitch)
- (let ((entry (assoc pitch pitch-names-alist)))
- (if entry
- (cdr entry))))
-(define chord-names-alist '())
-(set! chord-names-alist
+;;;;;;;;;
+(define chord::names-alist-banter '())
+(set! chord::names-alist-banter
(append
- '(
+ '(
; C iso C.no3.no5
- (((0 . 0)) . ("" . ""))
+ (((0 . 0)) . #f)
; C iso C.no5
- (((0 . 0) (2 . 0)) . ("" . ""))
+ (((0 . 0) (2 . 0)) . #f)
; Cm iso Cm.no5
- (((0 . 0) (2 . -1)) . ("m" . ""))
+ (((0 . 0) (2 . -1)) . ("m"))
+ ; C2 iso C2.no3
+ (((0 . 0) (1 . 0) (4 . 0)) . (("2" (type . "super"))))
+ ; C4 iso C4.no3
+ (((0 . 0) (3 . 0) (4 . 0)) . (("4" (type . "super"))))
; Cdim iso Cm5-
- (((0 . 0) (2 . -1) (4 . -1)) . ("dim" . ""))
+ (((0 . 0) (2 . -1) (4 . -1)) . ("dim"))
; Co iso Cm5-7-
; urg
- ; (((0 . 0) (2 . -1) (4 . -1) (6 . -2)) . ("" . ("feta-1" . ".")))
- (((0 . 0) (2 . -1) (4 . -1) (6 . -2)) . ("" . ("script" . "o")))
+ (((0 . 0) (2 . -1) (4 . -1) (6 . -2)) . (("o" (type . "super"))))
; Cdim9
- (((0 . 0) (2 . -1) (4 . -1) (6 . -2) (1 . -1)) . ("dim" . ("script" . "9")))
- (((0 . 0) (2 . -1) (4 . -1) (6 . -2) (1 . -1) (3 . -1)) . ("dim" . ("script" . "11")))
+ (((0 . 0) (2 . -1) (4 . -1) (6 . -2) (1 . -1)) . ("dim" ("9" (type . "super"))))
+ (((0 . 0) (2 . -1) (4 . -1) (6 . -2) (1 . -1) (3 . -1)) . ("dim" ("11" (type . "super"))))
)
- chord-names-alist))
-
-(define (user-chord-name chord)
- ;(display chord)
- ;(newline)
- (let ((entry (assoc chord chord-names-alist)))
- (if entry
- (cdr entry))))
+ chord::names-alist-banter))
+
+
+(define chord::names-alist-american '())
+(set! chord::names-alist-american
+ (append
+ '(
+ (((0 . 0)) . #f)
+ (((0 . 0) (2 . 0)) . #f)
+ (((0 . 0) (2 . -1)) . ("m"))
+ (((0 . 0) (2 . -1) (4 . -1)) . ("dim"))
+ (((0 . 0) (4 . 0)) . (("5" (type . "super"))))
+ (((0 . 0) (3 . 0) (4 . 0)) . ("sus"))
+ (((0 . 0) (2 . -1) (4 . -1)) . (("o" (type . "super"))))
+
+ (((0 . 0) (2 . -1) (4 . -1) (6 . -2)) . (("o7" (type . "super"))))
+ ;jazz: the delta, see jazz-chords.ly
+ ;(((0 . 0) (2 . -1) (4 . -1) (6 . -2)) . (("N" (type . "super") (style . "msam") (size . -3))))
+
+ ;(((0 . 0) (2 . -1) (4 . -1) (6 . -1)) . (("x7" (type . "super"))))
+ ; slashed o
+ (((0 . 0) (2 . -1) (4 . -1) (6 . -1)) . (("o" (type . "super")) ("/" (size . -2) (offset . (-0.58 . 0.5))) ("7" (type . "super"))))
+
+ (((0 . 0) (2 . 0) (4 . 1)) . ("aug"))
+ (((0 . 0) (2 . 0) (4 . 1) (6 . -1)) . (("aug" ("7" (type . "super")))))
+
+ (((0 . 0) (2 . 0) (4 . -1) (6 . 0)) . (("maj7" (type . "super")) ("accidentals--1" (font . "feta") (type . "super")) ("5" (type . "super"))))
+
+ (((0 . 0) (3 . 0) (4 . 0) (6 . -1)) . (("7sus4" (type . "super"))))
+
+ (((0 . 0) (2 . 0) (4 . 0) (5 . 0)) . (("maj6" (type . "super"))))
+ ;; dont need this?
+ ;(((0 . 0) (2 . -1) (4 . 0) (5 . 0)) . ("m6" . ""))
+
+ ;; c = 0, d = 1
+ ;;(((0 . 0) (2 . 0) (4 . 0) (8 . 0)) . ("add9" . ""))
+ ;;(((0 . 0) (2 . 0) (4 . 0) (1 . 0)) . ("" . (("script" . "add9"))))
+
+ ;; we don't want the '/no7'
+ ;;(((0 . 0) (2 . 0) (4 . 0) (5 . 0) (8 . 0)) . ("6/9" . ""))
+ ;;(((0 . 0) (2 . 0) (4 . 0) (5 . 0) (1 . 0)) . (("script" . "6/9"))))
+
+ ;;already have this?
+ ;;(((0 . 0) (2 . 0) (4 . 0) (6 . 0) (1 . 0)) . ("maj9" . ""))
+
+ )
+ chord::names-alist-american))
+
+;;;;;;;;;;
+
+
+(define (pitch->note-name pitch)
+ (cons (cadr pitch) (caddr pitch)))
+
+(define (pitch->text pitch)
+ (cons
+ (make-string 1 (integer->char (+ (modulo (+ (cadr pitch) 2) 7) 65)))
+ (if (= (caddr pitch) 0)
+ '()
+ (list (list (string-append "accidentals-"
+ (number->string (caddr pitch)))
+ '(font . "feta"))))))
+
+(define (step->text pitch)
+ (string-append
+ (number->string (+ (cadr pitch) (if (= (car pitch) 0) 1 8)))
+ (case (caddr pitch)
+ ((-2) "--")
+ ((-1) "-")
+ ((0) "")
+ ((1) "+")
+ ((2) "++"))))
+
+(define (pitch->text-banter pitch)
+ (pitch->text pitch))
+
+(define (step->text-banter pitch)
+ (if (= (cadr pitch) 6)
+ (case (caddr pitch)
+ ((-2) "7-")
+ ((-1) "7")
+ ((0) "maj7")
+ ((1) "7+")
+ ((2) "7+"))
+ (step->text pitch)))
+
+(define pitch::semitone-vec (list->vector '(0 2 4 5 7 9 11)))
+
+(define (pitch::semitone pitch)
+ (+ (* (car pitch) 12)
+ (vector-ref pitch::semitone-vec (modulo (cadr pitch) 7))
+ (caddr pitch)))
+
+(define (pitch::transpose pitch delta)
+ (let ((simple-octave (+ (car pitch) (car delta)))
+ (simple-notename (+ (cadr pitch) (cadr delta))))
+ (let ((octave (+ simple-octave (quotient simple-notename 7)))
+ (notename (modulo simple-notename 7)))
+ (let ((accidental (- (+ (pitch::semitone pitch) (pitch::semitone delta))
+ (pitch::semitone `(,octave ,notename 0)))))
+ `(,octave ,notename ,accidental)))))
+
+(define (pitch::diff pitch tonic)
+ (let ((simple-octave (- (car pitch) (car tonic)))
+ (simple-notename (- (cadr pitch) (cadr tonic))))
+ (let ((octave (+ simple-octave (quotient simple-notename 7)
+ (if (< simple-notename 0) -1 0)))
+ (notename (modulo simple-notename 7)))
+ (let ((accidental (- (pitch::semitone pitch)
+ (pitch::semitone tonic)
+ (pitch::semitone `(,octave ,notename 0)))))
+ `(,octave ,notename ,accidental)))))
+
+(define (pitch::note-pitch pitch)
+ (+ (* (car pitch) 7) (cadr pitch)))
+
+(define (chord::step tonic pitch)
+ (- (pitch::note-pitch pitch) (pitch::note-pitch tonic)))
+
+;; text: list of word
+;; word: string + optional list of property
+;; property: align, kern, font (?), size
+
+(define chord::minor-major-vec (list->vector '(0 -1 -1 0 -1 -1 0)))
+
+;; compute the relative-to-tonic pitch that goes with 'step'
+(define (chord::step-pitch tonic step)
+ ;; urg, we only do this for thirds
+ (if (= (modulo step 2) 0)
+ '(0 0 0)
+ (let loop ((i 1) (pitch tonic))
+ (if (= i step) pitch
+ (loop (+ i 2)
+ (pitch::transpose
+ pitch `(0 2 ,(vector-ref chord::minor-major-vec
+ ;; -1 (step=1 -> vector=0) + 7 = 6
+ (modulo (+ i 6) 7)))))))))
+
+;; find the pitches that are not part of `normal' chord
+(define (chord::additions chord-pitches)
+ (let ((tonic (car chord-pitches)))
+ ;; walk the chord steps: 1, 3, 5
+ (let loop ((step 1) (pitches chord-pitches) (additions '()))
+ (if (pair? pitches)
+ (let* ((pitch (car pitches))
+ (p-step (+ (- (pitch::note-pitch pitch)
+ (pitch::note-pitch tonic))
+ 1)))
+ ;; pitch is an addition if
+ (if (or
+ ;; it comes before this step or
+ (< p-step step)
+ ;; its step is even or
+ (= (modulo p-step 2) 0)
+ ;; has same step, but different accidental or
+ (and (= p-step step)
+ (not (equal? pitch (chord::step-pitch tonic step))))
+ ;; is the last of the chord and not one of base thirds
+ (and (> p-step 5)
+ (= (length pitches) 1)))
+ (loop step (cdr pitches) (cons pitch additions))
+ (if (= p-step step)
+ (loop step (cdr pitches) additions)
+ (loop (+ step 2) pitches additions))))
+ (reverse additions)))))
+
+;; find the pitches that are missing from `normal' chord
+(define (chord::subtractions chord-pitches)
+ (let ((tonic (car chord-pitches)))
+ (let loop ((step 1) (pitches chord-pitches) (subtractions '()))
+ (if (pair? pitches)
+ (let* ((pitch (car pitches))
+ (p-step (+ (- (pitch::note-pitch pitch)
+ (pitch::note-pitch tonic))
+ 1)))
+ ;; pitch is an subtraction if
+ ;; a step is missing or
+ (if (> p-step step)
+ (loop (+ step 2) pitches
+ (cons (chord::step-pitch tonic step) subtractions))
+ ;; there are no pitches left, but base thirds are not yet done and
+ (if (and (<= step 5)
+ (= (length pitches) 1))
+ ;; present pitch is not missing step
+ (if (= p-step step)
+ (loop (+ step 2) pitches subtractions)
+ (loop (+ step 2) pitches
+ (cons (chord::step-pitch tonic step) subtractions)))
+ (if (= p-step step)
+ (loop (+ step 2) (cdr pitches) subtractions)
+ (loop step (cdr pitches) subtractions)))))
+ (reverse subtractions)))))
+
+;; combine tonic, user-specified chordname,
+;; additions, subtractions and base or inversion to chord name
+;;
+(define (chord::inner-name-banter tonic user-name additions subtractions base-and-inversion)
+ (apply append (pitch->text-banter tonic)
+ (if user-name user-name '())
+ ;; why does list->string not work, format seems only hope...
+ (if (and use-regex
+ (string-match "super" (format "~s" user-name))
+ (or (pair? additions)
+ (pair? subtractions)))
+ '(("/" (type . "super")))
+ '())
+ (let loop ((from additions) (to '()))
+ (if (pair? from)
+ (let ((p (car from)))
+ (loop (cdr from)
+ (append to
+ (cons
+ (cons (step->text-banter p) '((type . "super")))
+ (if (or (pair? (cdr from))
+ (pair? subtractions))
+ '(("/" (type . "super")))
+ '())))))
+ to))
+ (let loop ((from subtractions) (to '()))
+ (if (pair? from)
+ (let ((p (car from)))
+ (loop (cdr from)
+ (append to
+ (cons '("no" (type . "super"))
+ (cons
+ (cons (step->text-banter p) '((type . "super")))
+ (if (pair? (cdr from))
+ '(("/" (type . "super")))
+ '()))))))
+ to))
+ (if (and (pair? base-and-inversion)
+ (or (car base-and-inversion)
+ (cdr base-and-inversion)))
+ (cons "/" (append
+ (if (car base-and-inversion)
+ (pitch->text
+ (car base-and-inversion))
+ (pitch->text
+ (cdr base-and-inversion)))
+ '()))
+ '())
+ '()))
+
+(define (chord::name-banter tonic user-name pitches base-and-inversion)
+ (let ((additions (chord::additions pitches))
+ (subtractions (chord::subtractions pitches)))
+ (chord::inner-name-banter tonic user-name additions subtractions base-and-inversion)))
+
+;; american chordnames use no "no",
+;; but otherwise very similar to banter for now
+(define (chord::name-american tonic user-name pitches base-and-inversion)
+ (let ((additions (chord::additions pitches))
+ (subtractions #f))
+ (chord::inner-name-banter tonic user-name additions subtractions base-and-inversion)))
+
+;; C++ entry point
+;;
+;; Check for each subset of chord, full chord first, if there's a
+;; user-override. Split the chord into user-overridden and to-be-done
+;; parts, complete the missing user-override matched part with normal
+;; chord to be name-calculated.
+;;
+(define (chord::user-name style pitches base-and-inversion)
+ ;(display "pitches:") (display pitches) (newline)
+ ;(display "style:") (display style) (newline)
+ ;(display "b&i:") (display base-and-inversion) (newline)
+ (let ((diff (pitch::diff '(0 0 0) (car pitches)))
+ (name-func
+ (ly-eval (string->symbol (string-append "chord::name-" style))))
+ (names-alist
+ (ly-eval (string->symbol (string-append "chord::names-alist-" style)))))
+ (let loop ((note-names (reverse pitches))
+ (chord '())
+ (user-name #f))
+ (if (pair? note-names)
+ (let ((entry (assoc
+ (reverse
+ (map (lambda (x)
+ (pitch->note-name (pitch::transpose x diff)))
+ note-names))
+ names-alist)))
+ (if entry
+ ;; urg? found: break loop
+ (loop '() chord (cdr entry))
+ (loop (cdr note-names) (cons (car note-names) chord) #f)))
+ (let* ((transposed (if pitches
+ (map (lambda (x) (pitch::transpose x diff)) chord)
+ '()))
+ (matched (if (= (length chord) 0)
+ 3
+ (- (length pitches) (length chord))))
+ (completed
+ (append (do ((i matched (- i 1))
+ (base '() (cons `(0 ,(* (- i 1) 2) 0) base)))
+ ((= i 0) base)
+ ())
+ transposed)))
+ (name-func (car pitches) user-name completed base-and-inversion))))))
projects / lilypond.git / blobdiff