/usr/share/lilypond/2.14.2/scm/song.scm is in lilypond-data 2.14.2-4.
This file is owned by root:root, with mode 0o644.
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;;;;
;;;; This file is part of LilyPond, the GNU music typesetter.
;;;;
;;;; Copyright (C) 2006, 2007 Brailcom, o.p.s.
;;;; Author: Milan Zamazal <pdm@brailcom.org>
;;;;
;;;; 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 <http://www.gnu.org/licenses/>.
(define-module (scm song))
(use-modules (srfi srfi-1))
(use-modules (ice-9 optargs))
(use-modules (ice-9 receive))
(use-modules (lily))
(use-modules (scm song-util))
;;; Configuration
;; The word to be sung in places where notes are played without lyrics.
;; If it is #f, the places without lyrics are omitted on the output.
(define-public *skip-word* "-skip-")
;; If true, use syllables in the Festival XML file.
;; If false, use whole words instead; this is necessary in languages like
;; English, were the phonetic form cannot be deduced from syllables well enough.
(define-public *syllabify* #f)
;; Base Festival octave to which LilyPond notes are mapped.
(define-public *base-octave* 5)
;; The resulting base octave is sum of *base-octave* and
;; *base-octave-shift*. This is done to work around a Festival bug
;; causing Festival to segfault or produce invalid pitch on higher pitches.
;(define *base-octave-shift* -2)
(define *base-octave-shift* 0)
;; The coeficient by which the notes just before \breath are shortened.
(define-public *breathe-shortage* 0.8)
;;; LilyPond interface
(define-public (output-file music tempo filename)
(if *debug*
(debug-enable 'backtrace))
(ly:message "Writing Festival XML file ~a..." filename)
(let ((port (open-output-file filename)))
(write-header port tempo)
(write-lyrics port music)
(write-footer port)
(close-port port))
#f)
;;; Utility functions
(define pp-pitch-names '((0 . "c") (1 . "des") (2 . "d") (3 . "es") (4 . "e") (5 . "f")
(6 . "ges") (7 . "g") (8 . "as") (9 . "a") (10 . "bes") (11 . "b")))
(define (pp object)
(cond
((list? object)
(format #f "[~{~a ~}]" (map pp object)))
((skip? object)
(format #f "skip(~a)" (skip-duration object)))
((lyrics? object)
(format #f "~a(~a)~a" (lyrics-text object) (lyrics-duration object)
(if (lyrics-unfinished object) "-" "")))
((note? object)
(let ((pitch (ly:pitch-semitones (note-pitch object))))
(format #f "~a~a~a~a"
(assoc-get (modulo pitch 12) pp-pitch-names)
(let ((octave (+ (inexact->exact (floor (/ pitch 12))) 1)))
(cond
((= octave 0)
"")
((> octave 0)
(make-uniform-array #\' octave))
((< octave 0)
(make-uniform-array #\, (- 0 octave)))))
(pp-duration (note-duration object))
(if (> (note-joined object) 0) "-" ""))))
((rest? object)
(format #f "r~a" (pp-duration (rest-duration object))))
(else
object)))
(define (pp-duration duration)
(set! duration (/ 4 duration))
(if (< (abs (- duration (inexact->exact duration))) 0.0001)
(inexact->exact duration)
(/ (round (* duration 100)) 100)))
(define-public (warning object-with-origin message . args)
(let ((origin (cond
((not object-with-origin)
#f)
((note? object-with-origin)
(note-origin object-with-origin))
((rest? object-with-origin)
(rest-origin object-with-origin))
((ly:input-location? object-with-origin)
object-with-origin)
((ly:music? object-with-origin)
(ly:music-property object-with-origin 'origin))
(else
(format #t "Minor programming error: ~a~%" object-with-origin)
#f))))
(if origin
(ly:input-message origin "***Song Warning***")
(format #t "~%***Song Warning***"))
(apply ly:message message (map pp args))))
;;; Analysis functions
(define *default-tempo* #f)
(define *tempo-compression* #f)
(define (duration->number duration)
(let* ((log (ly:duration-log duration))
(dots (ly:duration-dot-count duration))
(factor (ly:duration-factor duration)))
(exact->inexact (* (expt 2 (- log)) (+ 1 (/ dots 2)) (/ (car factor) (cdr factor))))))
(define (tempo->beats music)
(let* ((tempo-spec (find-child-named music 'SequentialMusic))
(tempo (cond
(tempo-spec
(let ((tempo-event (find-child-named tempo-spec
'TempoChangeEvent)))
(and tempo-event
(let ((count (ly:music-property tempo-event
'metronome-count)))
(* (if (pair? count)
(round (/ (+ (car count) (cdr count)) 2))
count)
(duration->number
(ly:music-property tempo-event 'tempo-unit)))))))
(else
(format #t "Programming error (tempo->beats): ~a~%"
tempo-spec)))))
(debug-enable 'backtrace)
(and tempo
(set! *default-tempo* (property-value
(find-child tempo-spec (lambda (elt)
(music-property? elt 'tempoWholesPerMinute)))))
(round (* tempo (expt 2 (+ 2 *base-octave-shift*)))))))
(defstruct music-context
music
context)
(define (collect-lyrics-music music)
;; Returns list of music-context instances.
(let ((music-context-list '()))
(process-music
music
(lambda (music*)
(cond
((music-name? music* 'LyricCombineMusic)
(push! (make-music-context #:music music*
#:context (ly:music-property music* 'associated-context))
music-context-list)
#t)
((and (music-name? music* 'ContextSpeccedMusic)
(music-property-value? music* 'context-type 'Lyrics)
(not (find-child-named music* 'LyricCombineMusic)))
(let ((name-node (find-child music* (lambda (node) (music-property? node 'associatedVoice)))))
(if name-node
(push! (make-music-context #:music music* #:context (property-value name-node))
music-context-list)))
#t)
(else
#f))))
(debug "Lyrics contexts" (reverse music-context-list))))
(defstruct lyrics
text
duration
unfinished
ignore-melismata
context)
(defstruct skip
duration
context)
(define (get-lyrics music context)
;; Returns list of lyrics and skip instances.
(let ((lyrics-list '())
(next-ignore-melismata #f)
(ignore-melismata #f)
(next-current-voice context)
(current-voice context))
(process-music
music
(lambda (music)
(cond
;; true lyrics
((music-name? music 'EventChord)
(let ((lyric-event (find-child-named music 'LyricEvent)))
(push! (make-lyrics
#:text (ly:music-property lyric-event 'text)
#:duration (* (duration->number (ly:music-property lyric-event 'duration)) 4)
#:unfinished (and (not *syllabify*) (find-child-named music 'HyphenEvent))
#:ignore-melismata ignore-melismata
#:context current-voice)
lyrics-list))
;; LilyPond delays applying settings
(set! ignore-melismata next-ignore-melismata)
(set! current-voice next-current-voice)
#t)
;; skipping
((music-name? music 'SkipMusic)
(push! (make-skip
#:duration (* (duration->number (ly:music-property music 'duration)) 4)
#:context current-voice)
lyrics-list)
#t)
;; parameter change
((music-property? music 'ignoreMelismata)
(set! next-ignore-melismata (property-value music))
#t)
((music-property? music 'associatedVoice)
(set! next-current-voice (property-value music))
#t)
;; anything else
(else
#f))))
(debug "Raw lyrics" (reverse lyrics-list))))
(defstruct score-voice
context
elements ; list of score-* instances
)
(defstruct score-choice
lists ; of lists of score-* instances
(n-assigned 0) ; number of lists having a verse-block
)
(defstruct score-repetice
count ; number of repetitions
elements ; list of score-* instances
)
(defstruct score-notes
note/rest-list ; list of note and rest instances
(verse-block-list '()) ; lyrics attached to notes -- multiple elements are
; possible for multiple stanzas
)
(defstruct note
pitch
duration
joined ; to the next note
origin
)
(defstruct rest
duration
origin
)
(define (get-notes music)
;; Returns list of score-* instances.
(get-notes* music #t))
(define (get-notes* music autobeaming*)
;; Returns list of score-* instances.
(let* ((result-list '())
(in-slur 0)
(autobeaming autobeaming*)
(last-note-spec #f))
(process-music
music
(lambda (music)
(cond
;; context change
((music-has-property? music 'context-id)
(let ((context (ly:music-property music 'context-id))
(children (music-elements music)))
(add! (make-score-voice #:context (debug "Changing context" context)
#:elements (append-map (lambda (elt)
(get-notes* elt autobeaming))
children))
result-list))
#t)
;; timing change
((music-property? music 'timeSignatureFraction)
(let ((value (property-value music)))
(debug "Timing change" value)))
;; simultaneous notes
((music-name? music 'SimultaneousMusic)
(let ((simultaneous-lists (map (lambda (child)
(get-notes* child autobeaming))
(ly:music-property music 'elements))))
(debug "Simultaneous lists" simultaneous-lists)
(add! (make-score-choice #:lists simultaneous-lists) result-list))
#t)
;; repetice
((music-name? music 'VoltaRepeatedMusic)
(let ((repeat-count (ly:music-property music 'repeat-count))
(children (music-elements music)))
(add! (make-score-repetice #:count repeat-count
#:elements (append-map
(lambda (elt) (get-notes* elt autobeaming))
children))
result-list))
#t)
;; a note or rest
((or (music-name? music 'EventChord)
(music-name? music 'MultiMeasureRestMusic)) ; 2.10
(debug "Simple music event" music)
(if *tempo-compression*
(set! music (ly:music-compress (ly:music-deep-copy music) *tempo-compression*)))
(let ((note (find-child-named music 'NoteEvent))
(rest (if (music-name? music 'MultiMeasureRestMusic) ; 2.10
music
(or (find-child-named music 'RestEvent)
(find-child-named music 'MultiMeasureRestEvent) ; 2.8
))))
(cond
(note
(debug "Note" note)
(let* ((pitch (ly:music-property note 'pitch))
(duration (* (duration->number (ly:music-property note 'duration)) 4))
(events (filter identity (list
(find-child-named music 'SlurEvent)
(find-child-named music 'ManualMelismaEvent)
(and (not autobeaming)
(find-child-named music 'BeamEvent)))))
(slur-start (length (filter (lambda (e) (music-property-value? e 'span-direction -1))
events)))
(slur-end (length (filter (lambda (e) (music-property-value? e 'span-direction 1))
events))))
(set! in-slur (+ in-slur slur-start (- slur-end)))
(let ((note-spec (make-note #:pitch pitch #:duration duration #:joined in-slur
#:origin (ly:music-property note 'origin)))
(last-result (and (not (null? result-list)) (last result-list))))
(set! last-note-spec note-spec)
(if (and last-result
(score-notes? last-result))
(set-score-notes-note/rest-list!
last-result
(append (score-notes-note/rest-list last-result) (list note-spec)))
(add! (make-score-notes #:note/rest-list (list note-spec)) result-list)))))
(rest
(debug "Rest" rest)
(let* ((duration (* (duration->number (ly:music-property rest 'duration)) 4))
(rest-spec (make-rest #:duration duration
#:origin (ly:music-property rest 'origin)))
(last-result (and (not (null? result-list)) (last result-list))))
(if (and last-result
(score-notes? last-result))
(set-score-notes-note/rest-list! last-result
(append (score-notes-note/rest-list last-result)
(list rest-spec)))
(add! (make-score-notes #:note/rest-list (list rest-spec)) result-list))))))
#f)
;; autobeaming change
((music-property? music 'autoBeaming)
(set! autobeaming (property-value music))
#t)
;; melisma change
((music-property? music 'melismaBusy) ; 2.10
(let ((change (if (property-value music) 1 -1)))
(set! in-slur (+ in-slur change))
(if last-note-spec
(set-note-joined! last-note-spec (+ (note-joined last-note-spec) change)))))
;; tempo change
((music-property? music 'tempoWholesPerMinute)
(set! *tempo-compression* (ly:moment-div *default-tempo* (property-value music))))
;; breathe
((music-name? music 'BreathingEvent)
(if last-note-spec
(let* ((note-duration (note-duration last-note-spec))
(rest-spec (make-rest #:duration (* note-duration (- 1 *breathe-shortage*))
#:origin (ly:music-property music 'origin))))
(set-note-duration! last-note-spec (* note-duration *breathe-shortage*))
(add! (make-score-notes #:note/rest-list (list rest-spec)) result-list))
(warning music "\\\\breathe without previous note known")))
;; anything else
(else
#f))))
(debug "Raw notes" result-list)))
(defstruct verse-block ; lyrics for a given piece of music
verse-list
(fresh #t) ; if #t, this block hasn't been yet included in the final output
)
(defstruct parallel-blocks ; several parallel blocks (e.g. stanzas)
block-list ; list of verse-blocks
)
(defstruct sequential-blocks
block-list ; list of verse-blocks
)
(defstruct repeated-blocks
block-list ; list of verse-blocks
count ; number of repetitions
)
(defstruct verse ;
text ; separate text element (syllable or word)
notelist/rests ; list of note lists (slurs) and rests
(unfinished #f) ; whether to be merged with the following verse
)
(define (find-lyrics-score score-list context accept-default)
;; Returns score-* element of context or #f (if there's no such any).
(and (not (null? score-list))
(or (find-lyrics-score* (car score-list) context accept-default)
(find-lyrics-score (cdr score-list) context accept-default))))
(define (find-lyrics-score* score context accept-default)
(cond
((and (score-voice? score)
(equal? (score-voice-context score) context))
score)
((score-voice? score)
(find-lyrics-score (score-voice-elements score) context #f))
((score-choice? score)
(letrec ((lookup (lambda (lists)
(if (null? lists)
#f
(or (find-lyrics-score (car lists) context accept-default)
(lookup (cdr lists)))))))
(lookup (score-choice-lists score))))
((score-repetice? score)
(if accept-default
score
(find-lyrics-score (score-repetice-elements score) context accept-default)))
((score-notes? score)
(if accept-default
score
#f))
(else
(error "Unknown score element" score))))
(define (insert-lyrics! lyrics/skip-list score-list context)
;; Add verse-block-lists to score-list.
;; Each processed score-notes instance must receive at most one block in each
;; insert-lyrics! call. (It can get other blocks if more pieces of
;; lyrics are attached to the same score part.)
(let ((lyrics-score-list (find-lyrics-score score-list context #f)))
(debug "Lyrics+skip list" lyrics/skip-list)
(debug "Corresponding score-* list" score-list)
(if lyrics-score-list
(insert-lyrics*! lyrics/skip-list (list lyrics-score-list) context)
(warning #f "Lyrics context not found: ~a" context))))
(define (insert-lyrics*! lyrics/skip-list score-list context)
(debug "Processing lyrics" lyrics/skip-list)
(debug "Processing score" score-list)
(cond
((and (null? lyrics/skip-list)
(null? score-list))
#f)
((null? lyrics/skip-list)
(warning #f "Extra notes: ~a ~a" context score-list))
((null? score-list)
(warning #f "Extra lyrics: ~a ~a" context lyrics/skip-list))
(else
(let* ((lyrics/skip (car lyrics/skip-list))
(lyrics-context ((if (lyrics? lyrics/skip) lyrics-context skip-context) lyrics/skip))
(score (car score-list)))
(cond
((score-voice? score)
(let ((new-context (score-voice-context score)))
(if (equal? new-context lyrics-context)
(insert-lyrics*! lyrics/skip-list
(append (score-voice-elements score)
(if (null? (cdr score-list))
'()
(list (make-score-voice #:context context
#:elements (cdr score-list)))))
new-context)
(insert-lyrics*! lyrics/skip-list (cdr score-list) context))))
((score-choice? score)
(let* ((lists* (score-choice-lists score))
(lists lists*)
(n-assigned (score-choice-n-assigned score))
(n 0)
(allow-default #f)
(score* #f))
(while (and (not score*)
(not (null? lists)))
(set! score* (find-lyrics-score (car lists) lyrics-context allow-default))
(set! lists (cdr lists))
(if (not score*)
(set! n (+ n 1)))
(if (and (null? lists)
(not allow-default)
(equal? lyrics-context context))
(begin
(set! allow-default #t)
(set! n 0)
(set! lists (score-choice-lists score)))))
(debug "Selected score" score*)
(if (and score*
(>= n n-assigned))
(begin
(if (> n n-assigned)
(receive (assigned-elts unassigned-elts) (split-at lists* n-assigned)
(set-score-choice-lists! score (append assigned-elts
(list (list-ref lists* n))
(take unassigned-elts (- n n-assigned))
lists))))
(set-score-choice-n-assigned! score (+ n-assigned 1))))
(insert-lyrics*! lyrics/skip-list (append (if score* (list score*) '()) (cdr score-list)) context)))
((score-repetice? score)
(insert-lyrics*! lyrics/skip-list
(append (score-repetice-elements score) (cdr score-list)) context))
((score-notes? score)
;; This is the only part which actually attaches the processed lyrics.
;; The subsequent calls return verses which we collect into a verse block.
;; We add the block to the score element.
(if (equal? lyrics-context context)
(set! lyrics/skip-list (really-insert-lyrics! lyrics/skip-list score context)))
(insert-lyrics*! lyrics/skip-list (cdr score-list) context))
(else
(error "Unknown score element in lyrics processing" score)))))))
(define (really-insert-lyrics! lyrics/skip-list score context)
;; Return new lyrics/skip-list.
;; Score is modified by side effect.
(debug "Assigning notes" score)
(let ((note-list (score-notes-note/rest-list score))
(unfinished-verse #f)
(verse-list '()))
(while (not (null? note-list))
(if (null? lyrics/skip-list)
(let ((final-rests '()))
(while (and (not (null? note-list))
(rest? (car note-list)))
(push! (car note-list) final-rests)
(set! note-list (cdr note-list)))
(if (not (null? final-rests))
(set! verse-list (append verse-list
(list (make-verse #:text ""
#:notelist/rests (reverse! final-rests))))))
(if (not (null? note-list))
(begin
(warning (car note-list) "Missing lyrics: ~a ~a" context note-list)
(set! note-list '()))))
(let ((lyrics/skip (car lyrics/skip-list)))
(receive (notelist/rest note-list*) (if (lyrics? lyrics/skip)
(consume-lyrics-notes lyrics/skip note-list context)
(consume-skip-notes lyrics/skip note-list context))
(debug "Consumed notes" (list lyrics/skip notelist/rest))
(set! note-list note-list*)
(cond
((null? notelist/rest)
#f)
;; Lyrics
((and (lyrics? lyrics/skip)
unfinished-verse)
(set-verse-text!
unfinished-verse
(string-append (verse-text unfinished-verse) (lyrics-text lyrics/skip)))
(set-verse-notelist/rests!
unfinished-verse
(append (verse-notelist/rests unfinished-verse) (list notelist/rest)))
(if (not (lyrics-unfinished lyrics/skip))
(set! unfinished-verse #f)))
((lyrics? lyrics/skip)
(let ((verse (make-verse #:text (if (rest? notelist/rest)
""
(lyrics-text lyrics/skip))
#:notelist/rests (list notelist/rest))))
(add! verse verse-list)
(set! unfinished-verse (if (lyrics-unfinished lyrics/skip) verse #f))))
;; Skip
((skip? lyrics/skip)
(cond
((rest? notelist/rest)
(if (null? verse-list)
(set! verse-list (list (make-verse #:text ""
#:notelist/rests (list notelist/rest))))
(let ((last-verse (last verse-list)))
(set-verse-notelist/rests!
last-verse
(append (verse-notelist/rests last-verse) (list notelist/rest))))))
((pair? notelist/rest)
(add! (make-verse #:text *skip-word* #:notelist/rests (list notelist/rest))
verse-list))
(else
(error "Unreachable branch reached")))
(set! unfinished-verse #f)))
(if (not (rest? notelist/rest))
(set! lyrics/skip-list (cdr lyrics/skip-list)))))))
(if unfinished-verse
(set-verse-unfinished! unfinished-verse #t))
(set-score-notes-verse-block-list!
score
(append (score-notes-verse-block-list score)
(list (make-verse-block #:verse-list verse-list)))))
lyrics/skip-list)
(define (consume-lyrics-notes lyrics note-list context)
;; Returns list of note instances + new note-list.
(assert (lyrics? lyrics))
(if (and (not (null? note-list))
(rest? (car note-list)))
(values (car note-list) (cdr note-list))
(let ((ignore-melismata (lyrics-ignore-melismata lyrics))
(join #t)
(consumed '()))
(while (and join
(not (null? note-list)))
(let ((note (car note-list)))
(push! note consumed)
(let ((note-slur (note-joined note)))
(if (< note-slur 0)
(warning note "Slur underrun"))
(set! join (and (not ignore-melismata) (> note-slur 0)))))
(set! note-list (cdr note-list)))
(if join
(warning (safe-car (if (null? note-list) consumed note-list))
"Unfinished slur: ~a ~a" context consumed))
(values (reverse consumed) note-list))))
(define (consume-skip-notes skip note-list context)
;; Returns either note list (skip word defined) or rest instance (no skip word) + new note-list.
(assert (skip? skip))
(let ((duration (skip-duration skip))
(epsilon 0.001)
(consumed '()))
(while (and (> duration epsilon)
(not (null? note-list)))
(let ((note (car note-list)))
(assert (note? note))
(push! note consumed)
(set! duration (- duration (note-duration note))))
(set! note-list (cdr note-list)))
(set! consumed (reverse! consumed))
(cond
((> duration epsilon)
(warning (if (null? note-list) (safe-last consumed) (safe-car note-list))
"Excessive skip: ~a ~a ~a ~a" context skip duration consumed))
((< duration (- epsilon))
(warning (if (null? note-list) (safe-last consumed) (safe-car note-list))
"Skip misalignment: ~a ~a ~a ~a" context skip duration consumed)))
(values (if *skip-word*
consumed
'())
note-list)))
(define (extract-verse-blocks score)
;; Returns list of blocks and parallel blocks.
(debug "Extracting verse blocks" score)
(cond
((score-voice? score)
(append-map extract-verse-blocks (score-voice-elements score)))
((score-choice? score)
(list (make-parallel-blocks
#:block-list (map (lambda (block-list)
(make-sequential-blocks
#:block-list (append-map extract-verse-blocks block-list)))
(score-choice-lists score)))))
((score-repetice? score)
(list (make-repeated-blocks #:count (score-repetice-count score)
#:block-list (append-map extract-verse-blocks
(score-repetice-elements score)))))
((score-notes? score)
(list (make-parallel-blocks #:block-list (score-notes-verse-block-list score))))
(else
(error "Invalid score element" score))))
(define (extract-verses score-list)
;; Returns (final) list of verses.
;; The primary purpose of this routine is to build complete stanzas from
;; lists of verse blocks.
;; Extract verse-blocks and process them until no unprocessed stanzas remain.
(debug "Final score list" score-list)
(let ((verse-block-list (debug "Verse blocks" (append-map extract-verse-blocks score-list))))
(letrec ((combine (lambda (lst-1 lst-2)
(debug "Combining lists" (list lst-1 lst-2))
(if (null? lst-2)
lst-1
(let ((diff (- (length lst-1) (length lst-2))))
(if (< diff 0)
(let ((last-elt (last lst-1)))
(while (< diff 0)
(add! last-elt lst-1)
(set! diff (+ diff 1))))
(let ((last-elt (last lst-2)))
(while (> diff 0)
(add! last-elt lst-2)
(set! diff (- diff 1)))))
(debug "Combined" (map append lst-1 lst-2))))))
(expand* (lambda (block)
(cond
((parallel-blocks? block)
(append-map (lambda (block) (expand (list block)))
(parallel-blocks-block-list block)))
((sequential-blocks? block)
(expand (sequential-blocks-block-list block)))
((repeated-blocks? block)
;; Only simple repetice without nested parallel sections is supported.
(let ((count (repeated-blocks-count block))
(expanded (expand (repeated-blocks-block-list block)))
(expanded* '()))
(while (not (null? expanded))
(let ((count* count)
(item '()))
(while (and (> count* 0) (not (null? expanded)))
(set! item (append item (car expanded)))
(set! expanded (cdr expanded))
(set! count* (- count* 1)))
(push! item expanded*)))
(reverse expanded*)))
(else
(list (list block))))))
(expand (lambda (block-list)
(debug "Expanding list" block-list)
(if (null? block-list)
'()
(debug "Expanded" (combine (expand* (car block-list))
(expand (cdr block-list)))))))
(merge (lambda (verse-list)
(cond
((null? verse-list)
'())
((verse-unfinished (car verse-list))
(let ((verse-1 (first verse-list))
(verse-2 (second verse-list)))
(merge (cons (make-verse #:text (string-append (verse-text verse-1)
(verse-text verse-2))
#:notelist/rests (append (verse-notelist/rests verse-1)
(verse-notelist/rests verse-2))
#:unfinished (verse-unfinished verse-2))
(cddr verse-list)))))
(else
(cons (car verse-list) (merge (cdr verse-list))))))))
(debug "Final verses" (merge (append-map (lambda (lst) (append-map verse-block-verse-list lst))
(expand verse-block-list)))))))
(define (handle-music music)
;; Returns list of verses.
;; The main analysis function.
(if *debug*
(display-scheme-music music))
(let ((score-list (debug "Final raw notes" (get-notes music)))
(music-context-list (collect-lyrics-music music)))
(for-each (lambda (music-context)
(let ((context (music-context-context music-context)))
(set! *tempo-compression* #f)
(insert-lyrics! (get-lyrics (music-context-music music-context) context)
score-list context)
(debug "Final score list" score-list)))
music-context-list)
(extract-verses score-list)))
;;; Output
(define festival-note-mapping '((0 "C") (1 "C#") (2 "D") (3 "D#") (4 "E") (5 "F") (6 "F#")
(7 "G") (8 "G#") (9 "A") (10 "A#") (11 "B")))
(define (festival-pitch pitch)
(let* ((semitones (ly:pitch-semitones pitch))
(octave (inexact->exact (floor (/ semitones 12))))
(tone (modulo semitones 12)))
(format #f "~a~a" (car (assoc-get tone festival-note-mapping))
(+ octave *base-octave* *base-octave-shift*))))
(define (write-header port tempo)
(let ((beats (or (tempo->beats tempo) 100)))
(format port "<?xml version=\"1.0\"?>
<!DOCTYPE SINGING PUBLIC \"-//SINGING//DTD SINGING mark up//EN\" \"Singing.v0_1.dtd\" []>
<SINGING BPM=\"~d\">
" beats)))
(define (write-footer port)
(format port "</SINGING>~%"))
(define (write-lyrics port music)
(let ((rest-dur 0))
(for-each (lambda (verse)
(let ((text (verse-text verse))
(note/rest-list (verse-notelist/rests verse)))
(receive (rest-list note-listlist) (partition rest? note/rest-list)
(debug "Rest list" rest-list)
(debug "Note list" note-listlist)
(if (not (null? rest-list))
(set! rest-dur (+ rest-dur (apply + (map rest-duration rest-list)))))
(if (not (null? note-listlist))
(begin
(if (> rest-dur 0)
(begin
(write-rest-element port rest-dur)
(set! rest-dur 0)))
(write-lyrics-element port text note-listlist))))))
(handle-music music))
(if (> rest-dur 0)
(write-rest-element port rest-dur))))
(define (write-lyrics-element port text slur-list)
(let ((fmt "~{~{~a~^+~}~^,~}")
(transform (lambda (function)
(map (lambda (slur)
(let ((rests (filter rest? slur)))
(if (not (null? rests))
(begin
(warning (car rests) "Rests in a slur: ~a" slur)
(set! slur (remove rest? slur)))))
(map function slur))
slur-list))))
(format port "<DURATION BEATS=\"~@?\"><PITCH NOTE=\"~@?\">~a</PITCH></DURATION>~%"
fmt (transform note-duration)
fmt (transform (compose festival-pitch note-pitch))
text)))
(define (write-rest-element port duration)
(format port "<REST BEATS=\"~a\"></REST>~%" duration))
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