Entry point for the parser."
(let* ((flat-mods (flatten-list modifications))
- (base-chord (stack-thirds (ly:make-pitch 0 4 0) the-canonical-chord))
- (complete-chord '())
- (bass #f)
- (inversion #f)
- (lead-mod #f)
- (explicit-11 #f)
- (start-additions #t))
+ (base-chord (stack-thirds (ly:make-pitch 0 4 0) the-canonical-chord))
+ (complete-chord '())
+ (bass #f)
+ (inversion #f)
+ (lead-mod #f)
+ (explicit-11 #f)
+ (start-additions #t))
(define (interpret-inversion chord mods)
"Read /FOO part. Side effect: INVERSION is set."
(if (and (> (length mods) 1) (eq? (car mods) 'chord-slash))
- (begin
- (set! inversion (cadr mods))
- (set! mods (cddr mods))))
+ (begin
+ (set! inversion (cadr mods))
+ (set! mods (cddr mods))))
(interpret-bass chord mods))
(define (interpret-bass chord mods)
"Read /+FOO part. Side effect: BASS is set."
(if (and (> (length mods) 1) (eq? (car mods) 'chord-bass))
- (begin
- (set! bass (cadr mods))
- (set! mods (cddr mods))))
+ (begin
+ (set! bass (cadr mods))
+ (set! mods (cddr mods))))
(if (pair? mods)
- (ly:warning (_ "Spurious garbage following chord: ~A") mods))
+ (ly:warning (_ "Spurious garbage following chord: ~A") mods))
chord)
- (define (interpret-removals chord mods)
+ (define (interpret-removals chord mods)
(define (inner-interpret chord mods)
- (if (and (pair? mods) (ly:pitch? (car mods)))
- (inner-interpret (remove-step (+ 1 (ly:pitch-steps (car mods))) chord)
- (cdr mods))
- (interpret-inversion chord mods)))
+ (if (and (pair? mods) (ly:pitch? (car mods)))
+ (inner-interpret (remove-step (+ 1 (ly:pitch-steps (car mods))) chord)
+ (cdr mods))
+ (interpret-inversion chord mods)))
(if (and (pair? mods) (eq? (car mods) 'chord-caret))
- (inner-interpret chord (cdr mods))
- (interpret-inversion chord mods)))
+ (inner-interpret chord (cdr mods))
+ (interpret-inversion chord mods)))
(define (interpret-additions chord mods)
"Interpret additions. TODO: should restrict modifier use?"
(cond ((null? mods) chord)
- ((ly:pitch? (car mods))
- (if (= (pitch-step (car mods)) 11)
- (set! explicit-11 #t))
- (interpret-additions (cons (car mods) (remove-step (pitch-step (car mods)) chord))
- (cdr mods)))
- ((procedure? (car mods))
- (interpret-additions ((car mods) chord)
- (cdr mods)))
- (else (interpret-removals chord mods))))
+ ((ly:pitch? (car mods))
+ (if (= (pitch-step (car mods)) 11)
+ (set! explicit-11 #t))
+ (interpret-additions (cons (car mods) (remove-step (pitch-step (car mods)) chord))
+ (cdr mods)))
+ ((procedure? (car mods))
+ (interpret-additions ((car mods) chord)
+ (cdr mods)))
+ (else (interpret-removals chord mods))))
(define (pitch-octavated-strictly-below p root)
- "return P, but octavated, so it is below ROOT"
+ "return P, but octavated, so it is below ROOT"
(ly:make-pitch (+ (ly:pitch-octave root)
- (if (> (ly:pitch-notename root)
- (ly:pitch-notename p))
- 0 -1))
- (ly:pitch-notename p)
- (ly:pitch-alteration p)))
+ (if (> (ly:pitch-notename root)
+ (ly:pitch-notename p))
+ 0 -1))
+ (ly:pitch-notename p)
+ (ly:pitch-alteration p)))
(define (process-inversion complete-chord)
"Take out inversion from COMPLETE-CHORD, and put it at the bottom.
"
(let* ((root (car complete-chord))
- (inv? (lambda (y)
- (and (= (ly:pitch-notename y)
- (ly:pitch-notename inversion))
- (= (ly:pitch-alteration y)
- (ly:pitch-alteration inversion)))))
- (rest-of-chord (remove inv? complete-chord))
- (inversion-candidates (filter inv? complete-chord))
- (down-inversion (pitch-octavated-strictly-below inversion root)))
- (if (pair? inversion-candidates)
- (set! inversion (car inversion-candidates))
- (begin
- (set! bass inversion)
- (set! inversion #f)))
- (if inversion
- (cons down-inversion rest-of-chord)
- rest-of-chord)))
+ (inv? (lambda (y)
+ (and (= (ly:pitch-notename y)
+ (ly:pitch-notename inversion))
+ (= (ly:pitch-alteration y)
+ (ly:pitch-alteration inversion)))))
+ (rest-of-chord (remove inv? complete-chord))
+ (inversion-candidates (filter inv? complete-chord))
+ (down-inversion (pitch-octavated-strictly-below inversion root)))
+ (if (pair? inversion-candidates)
+ (set! inversion (car inversion-candidates))
+ (begin
+ (set! bass inversion)
+ (set! inversion #f)))
+ (if inversion
+ (cons down-inversion rest-of-chord)
+ rest-of-chord)))
;; root is always one octave too low.
;; something weird happens when this is removed,
;; every other chord is octavated. --hwn... hmmm.
(set! root (ly:pitch-transpose root (ly:make-pitch 1 0 0)))
;; skip the leading : , we need some of the stuff following it.
(if (pair? flat-mods)
- (if (eq? (car flat-mods) 'chord-colon)
- (set! flat-mods (cdr flat-mods))
- (set! start-additions #f)))
+ (if (eq? (car flat-mods) 'chord-colon)
+ (set! flat-mods (cdr flat-mods))
+ (set! start-additions #f)))
;; remember modifier
(if (and (pair? flat-mods) (procedure? (car flat-mods)))
- (begin
- (set! lead-mod (car flat-mods))
- (set! flat-mods (cdr flat-mods))))
+ (begin
+ (set! lead-mod (car flat-mods))
+ (set! flat-mods (cdr flat-mods))))
;; extract first number if present, and build pitch list.
(if (and (pair? flat-mods)
- (ly:pitch? (car flat-mods))
- (not (eq? lead-mod sus-modifier)))
- (begin
- (if (= (pitch-step (car flat-mods)) 11)
- (set! explicit-11 #t))
- (set! base-chord
- (stack-thirds (car flat-mods) the-canonical-chord))
- (set! flat-mods (cdr flat-mods))))
+ (ly:pitch? (car flat-mods))
+ (not (eq? lead-mod sus-modifier)))
+ (begin
+ (if (= (pitch-step (car flat-mods)) 11)
+ (set! explicit-11 #t))
+ (set! base-chord
+ (stack-thirds (car flat-mods) the-canonical-chord))
+ (set! flat-mods (cdr flat-mods))))
;; apply modifier
(if (procedure? lead-mod)
- (set! base-chord (lead-mod base-chord)))
+ (set! base-chord (lead-mod base-chord)))
(set! complete-chord
- (if start-additions
- (interpret-additions base-chord flat-mods)
- (interpret-removals base-chord flat-mods)))
+ (if start-additions
+ (interpret-additions base-chord flat-mods)
+ (interpret-removals base-chord flat-mods)))
(set! complete-chord (sort complete-chord ly:pitch<?))
;; If natural 11 + natural 3 is present, but not given explicitly,
;; we remove the 11.
(if (and (not explicit-11)
- (get-step 11 complete-chord)
- (get-step 3 complete-chord)
- (= 0 (ly:pitch-alteration (get-step 11 complete-chord)))
- (= 0 (ly:pitch-alteration (get-step 3 complete-chord))))
- (set! complete-chord (remove-step 11 complete-chord)))
+ (get-step 11 complete-chord)
+ (get-step 3 complete-chord)
+ (= 0 (ly:pitch-alteration (get-step 11 complete-chord)))
+ (= 0 (ly:pitch-alteration (get-step 3 complete-chord))))
+ (set! complete-chord (remove-step 11 complete-chord)))
;; must do before processing inversion/bass, since they are
;; not relative to the root.
(set! complete-chord (map (lambda (x) (ly:pitch-transpose x root))
- complete-chord))
+ complete-chord))
(if inversion
- (set! complete-chord (process-inversion complete-chord)))
+ (set! complete-chord (process-inversion complete-chord)))
(if bass
- (set! bass (pitch-octavated-strictly-below bass root)))
+ (set! bass (pitch-octavated-strictly-below bass root)))
(if #f
- (begin
- (write-me "\n*******\n" flat-mods)
- (write-me "root: " root)
- (write-me "base chord: " base-chord)
- (write-me "complete chord: " complete-chord)
- (write-me "inversion: " inversion)
- (write-me "bass: " bass)))
+ (begin
+ (write-me "\n*******\n" flat-mods)
+ (write-me "root: " root)
+ (write-me "base chord: " base-chord)
+ (write-me "complete chord: " complete-chord)
+ (write-me "inversion: " inversion)
+ (write-me "bass: " bass)))
(if inversion
- (make-chord-elements (cdr complete-chord) bass duration (car complete-chord)
- inversion)
- (make-chord-elements complete-chord bass duration #f #f))))
+ (make-chord-elements (cdr complete-chord) bass duration (car complete-chord)
+ inversion)
+ (make-chord-elements complete-chord bass duration #f #f))))
(define (make-chord-elements pitches bass duration inversion original-inv-pitch)
'duration duration
'pitch pitch))
(let ((nots (map make-note-ev pitches))
- (bass-note (if bass (make-note-ev bass) #f))
- (inv-note (if inversion (make-note-ev inversion) #f)))
+ (bass-note (if bass (make-note-ev bass) #f))
+ (inv-note (if inversion (make-note-ev inversion) #f)))
(if bass-note
- (begin
- (set! (ly:music-property bass-note 'bass) #t)
- (set! nots (cons bass-note nots))))
+ (begin
+ (set! (ly:music-property bass-note 'bass) #t)
+ (set! nots (cons bass-note nots))))
(if inv-note
- (begin
- (set! (ly:music-property inv-note 'inversion) #t)
- (set! (ly:music-property inv-note 'octavation)
- (- (ly:pitch-octave inversion)
- (ly:pitch-octave original-inv-pitch)))
- (set! nots (cons inv-note nots))))
+ (begin
+ (set! (ly:music-property inv-note 'inversion) #t)
+ (set! (ly:music-property inv-note 'octavation)
+ (- (ly:pitch-octave inversion)
+ (ly:pitch-octave original-inv-pitch)))
+ (set! nots (cons inv-note nots))))
nots))
;;;;;;;;;;;;;;;;
- ; chord modifiers change the pitch list.
+; chord modifiers change the pitch list.
(define (aug-modifier pitches)
(set! pitches (replace-step (ly:make-pitch 0 4 SHARP) pitches))
;; canonical 13 chord.
(define the-canonical-chord
(map (lambda (n)
- (define (nca x)
- (if (= x 7) FLAT 0))
+ (define (nca x)
+ (if (= x 7) FLAT 0))
- (if (>= n 8)
- (ly:make-pitch 1 (- n 8) (nca n))
- (ly:make-pitch 0 (- n 1) (nca n))))
+ (if (>= n 8)
+ (ly:make-pitch 1 (- n 8) (nca n))
+ (ly:make-pitch 0 (- n 1) (nca n))))
'(1 3 5 7 9 11 13)))
(define (stack-thirds upper-step base)
"Stack thirds listed in BASE until we reach UPPER-STEP. Add
UPPER-STEP separately."
(cond ((null? base) '())
- ((> (ly:pitch-steps upper-step) (ly:pitch-steps (car base)))
- (cons (car base) (stack-thirds upper-step (cdr base))))
- ((<= (ly:pitch-steps upper-step) (ly:pitch-steps (car base)))
- (list upper-step))
- (else '())))
+ ((> (ly:pitch-steps upper-step) (ly:pitch-steps (car base)))
+ (cons (car base) (stack-thirds upper-step (cdr base))))
+ ((<= (ly:pitch-steps upper-step) (ly:pitch-steps (car base)))
+ (list upper-step))
+ (else '())))
projects / lilypond.git / blobdiff