1 ;;;; This file is part of LilyPond, the GNU music typesetter.
3 ;;;; Copyright (C) 2004--2015 Han-Wen Nienhuys <hanwen@xs4all.nl>
5 ;;;; LilyPond is free software: you can redistribute it and/or modify
6 ;;;; it under the terms of the GNU General Public License as published by
7 ;;;; the Free Software Foundation, either version 3 of the License, or
8 ;;;; (at your option) any later version.
10 ;;;; LilyPond is distributed in the hope that it will be useful,
11 ;;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
12 ;;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 ;;;; GNU General Public License for more details.
15 ;;;; You should have received a copy of the GNU General Public License
16 ;;;; along with LilyPond. If not, see <http://www.gnu.org/licenses/>.
18 ;; todo: figure out how to make module,
19 ;; without breaking nested ly scopes
21 (define-class <Voice-state> ()
22 (event-list #:init-value '() #:accessor events #:init-keyword #:events)
23 (when-moment #:accessor moment #:init-keyword #:moment)
24 (tuning #:accessor tuning #:init-keyword #:tuning)
25 (split-index #:accessor split-index)
29 ;; spanner-state is an alist
30 ;; of (SYMBOL . RESULT-INDEX), which indicates where
31 ;; said spanner was started.
32 (spanner-state #:init-value '() #:accessor span-state))
34 (define-method (write (x <Voice-state> ) file)
35 (display (moment x) file)
36 (display " evs = " file)
37 (display (events x) file)
38 (display " active = " file)
39 (display (span-state x) file)
42 (define-method (note-events (vs <Voice-state>))
44 (ly:in-event-class? x 'note-event))
45 (filter f? (events vs)))
47 ; Return a list of note events which is sorted and stripped of
48 ; properties that we do not want to prevent combining parts.
49 (define-method (comparable-note-events (vs <Voice-state>))
50 (define (note<? note1 note2)
51 (let ((p1 (ly:event-property note1 'pitch))
52 (p2 (ly:event-property note2 'pitch)))
53 (cond ((ly:pitch<? p1 p2) #t)
54 ((ly:pitch<? p2 p1) #f)
55 (else (ly:duration<? (ly:event-property note1 'duration)
56 (ly:event-property note2 'duration))))))
57 ;; TODO we probably should compare articulations too
58 (sort (map (lambda (x)
60 (ly:make-event-class 'note-event)
61 (list (cons 'duration (ly:event-property x 'duration))
62 (cons 'pitch (ly:event-property x 'pitch)))))
66 (define-method (rest-and-skip-events (vs <Voice-state>))
68 (or (ly:in-event-class? x 'rest-event)
69 (ly:in-event-class? x 'skip-event)))
70 (filter f? (events vs)))
72 (define-method (any-mmrest-events (vs <Voice-state>))
74 (ly:in-event-class? x 'multi-measure-rest-event))
77 (define-method (previous-voice-state (vs <Voice-state>))
78 (let ((i (slot-ref vs 'vector-index))
79 (v (slot-ref vs 'state-vector)))
84 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
86 (define-class <Split-state> ()
87 ;; The automatically determined split configuration
88 (configuration #:init-value '() #:accessor configuration)
89 ;; Allow overriding split configuration, takes precedence over configuration
90 (forced-configuration #:init-value #f #:accessor forced-configuration)
91 (when-moment #:accessor moment #:init-keyword #:moment)
92 ;; voice-states are states starting with the Split-state or later
94 (is #:init-keyword #:voice-states #:accessor voice-states)
95 (synced #:init-keyword #:synced #:init-value #f #:getter synced?))
98 (define-method (write (x <Split-state> ) f)
99 (display (moment x) f)
101 (display (configuration x) f)
103 (display " synced "))
106 (define-method (current-or-previous-voice-states (ss <Split-state>))
107 "Return voice states meeting the following conditions. For a voice
108 in sync, return the current voice state. For a voice out of sync,
109 return the previous voice state."
110 (let* ((vss (voice-states ss))
113 (if (and vs1 (not (equal? (moment vs1) (moment ss))))
114 (set! vs1 (previous-voice-state vs1)))
115 (if (and vs2 (not (equal? (moment vs2) (moment ss))))
116 (set! vs2 (previous-voice-state vs2)))
119 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
122 (define (previous-span-state vs)
123 (let ((p (previous-voice-state vs)))
124 (if p (span-state p) '())))
126 (define (make-voice-states evl)
127 (let ((vec (list->vector (map (lambda (v)
131 #:events (map car (cdr v))))
134 ((= i (vector-length vec)) vec)
135 (slot-set! (vector-ref vec i) 'vector-index i)
136 (slot-set! (vector-ref vec i) 'state-vector vec))))
138 (define (make-split-state vs1 vs2)
139 "Merge lists VS1 and VS2, containing Voice-state objects into vector
140 of Split-state objects, crosslinking the Split-state vector and
143 (define (helper ss-idx ss-list idx1 idx2)
144 (let* ((state1 (if (< idx1 (vector-length vs1)) (vector-ref vs1 idx1) #f))
145 (state2 (if (< idx2 (vector-length vs2)) (vector-ref vs2 idx2) #f))
146 (min (cond ((and state1 state2) (moment-min (moment state1) (moment state2)))
147 (state1 (moment state1))
148 (state2 (moment state2))
150 (inc1 (if (and state1 (equal? min (moment state1))) 1 0))
151 (inc2 (if (and state2 (equal? min (moment state2))) 1 0))
155 #:voice-states (cons state1 state2)
156 #:synced (= inc1 inc2))
159 (set! (split-index state1) ss-idx))
161 (set! (split-index state2) ss-idx))
164 (cons ss-object ss-list)
168 (list->vector (reverse! (helper 0 '() 0 0) '())))
170 (define (analyse-spanner-states voice-state-vec)
172 (define (helper index active)
173 "Analyse EVS at INDEX, given state ACTIVE."
175 (define (analyse-tie-start active ev)
176 (if (ly:in-event-class? ev 'tie-event)
177 (acons 'tie (split-index (vector-ref voice-state-vec index))
181 (define (analyse-tie-end active ev)
182 (if (ly:in-event-class? ev 'note-event)
183 (assoc-remove! active 'tie)
186 (define (analyse-absdyn-end active ev)
187 (if (or (ly:in-event-class? ev 'absolute-dynamic-event)
188 (and (ly:in-event-class? ev 'span-dynamic-event)
189 (equal? STOP (ly:event-property ev 'span-direction))))
190 (assoc-remove! (assoc-remove! active 'cresc) 'decr)
193 (define (active<? a b)
194 (cond ((symbol<? (car a) (car b)) #t)
195 ((symbol<? (car b) (car a)) #f)
196 (else (< (cdr a) (cdr b)))))
198 (define (analyse-span-event active ev)
199 (let* ((name (car (ly:event-property ev 'class)))
200 (key (cond ((equal? name 'slur-event) 'slur)
201 ((equal? name 'phrasing-slur-event) 'tie)
202 ((equal? name 'beam-event) 'beam)
203 ((equal? name 'crescendo-event) 'cresc)
204 ((equal? name 'decrescendo-event) 'decr)
206 (sp (ly:event-property ev 'span-direction)))
207 (if (and (symbol? key) (ly:dir? sp))
209 (assoc-remove! active key)
211 (split-index (vector-ref voice-state-vec index))
215 (define (analyse-events active evs)
216 "Run all analyzers on ACTIVE and EVS"
217 (define (run-analyzer analyzer active evs)
219 (run-analyzer analyzer (analyzer active (car evs)) (cdr evs))
221 (define (run-analyzers analyzers active evs)
222 (if (pair? analyzers)
223 (run-analyzers (cdr analyzers)
224 (run-analyzer (car analyzers) active evs)
227 (sort ;; todo: use fold or somesuch.
228 (run-analyzers (list analyse-absdyn-end analyse-span-event
229 ;; note: tie-start/span comes after tie-end/absdyn.
230 analyse-tie-end analyse-tie-start)
234 ;; must copy, since we use assoc-remove!
235 (if (< index (vector-length voice-state-vec))
237 (set! active (analyse-events active (events (vector-ref voice-state-vec index))))
238 (set! (span-state (vector-ref voice-state-vec index))
240 (helper (1+ index) active))))
244 (define recording-group-functions
245 ;;Selected parts from @var{toplevel-music-functions} not requiring @code{parser}.
247 (lambda (music) (expand-repeat-chords! '(rhythmic-event) music))
248 expand-repeat-notes!))
251 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
252 (define-public (recording-group-emulate music odef)
253 "Interpret @var{music} according to @var{odef}, but store all events
254 in a chronological list, similar to the @code{Recording_group_engraver} in
255 LilyPond version 2.8 and earlier."
258 (now-mom (ly:make-moment 0 0))
259 (global (ly:make-global-context odef))
260 (mom-listener (lambda (tev) (set! now-mom (ly:event-property tev 'moment))))
261 (new-context-listener
264 ((child (ly:event-property sev 'context))
265 (this-moment-list (cons (ly:context-id child) '()))
266 (dummy (set! context-list (cons this-moment-list context-list)))
268 (accumulate-event-listener
270 (set! acc (cons (cons ev #t) acc))))
276 (ly:context-property child 'instrumentTransposition))
277 ;; The accumulate-event-listener above creates
278 ;; the list of events in reverse order, so we
279 ;; have to revert it to the original order again
281 (set-cdr! this-moment-list
282 (cons this-moment (cdr this-moment-list)))
284 (ly:add-listener accumulate-event-listener
285 (ly:context-event-source child) 'StreamEvent)
286 (ly:add-listener save-acc-listener
287 (ly:context-event-source global) 'OneTimeStep)))))
288 (ly:add-listener new-context-listener
289 (ly:context-events-below global) 'AnnounceNewContext)
290 (ly:add-listener mom-listener (ly:context-event-source global) 'Prepare)
291 (ly:interpret-music-expression
292 (make-non-relative-music
293 (fold (lambda (x m) (x m)) music recording-group-functions))
297 (define-public (make-part-combine-music parser music-list direction chord-range)
298 (let* ((m (make-music 'PartCombineMusic))
299 (m1 (make-non-relative-music (context-spec-music (first music-list) 'Voice "one")))
300 (m2 (make-non-relative-music (context-spec-music (second music-list) 'Voice "two")))
301 (listener (ly:parser-lookup parser 'partCombineListener))
302 (evs2 (recording-group-emulate m2 listener))
303 (evs1 (recording-group-emulate m1 listener)))
305 (set! (ly:music-property m 'elements) (list m1 m2))
306 (set! (ly:music-property m 'direction) direction)
307 (set! (ly:music-property m 'split-list)
308 (if (and (assoc "one" evs1) (assoc "two" evs2))
309 (determine-split-list (reverse! (assoc-get "one" evs1) '())
310 (reverse! (assoc-get "two" evs2) '())
315 (define-public (determine-split-list evl1 evl2 chord-range)
316 "@var{evl1} and @var{evl2} should be ascending. @var{chord-range} is a pair of numbers (min . max) defining the distance in steps between notes that may be combined into a chord or unison."
318 (voice-state-vec1 (make-voice-states evl1))
319 (voice-state-vec2 (make-voice-states evl2))
320 (result (make-split-state voice-state-vec1 voice-state-vec2))
321 (chord-min-diff (car chord-range))
322 (chord-max-diff (cdr chord-range)))
324 ;; Go through all moments recursively and check if the events of that
325 ;; moment contain a part-combine-force-event override. If so, store its
326 ;; value in the forced-configuration field, which will override. The
327 ;; previous configuration is used to determine non-terminated settings.
328 (define (analyse-forced-combine result-idx prev-res)
330 (define (get-forced-event x)
331 (and (ly:in-event-class? x 'part-combine-force-event)
332 (cons (ly:event-property x 'forced-type)
333 (ly:event-property x 'once))))
334 (define (part-combine-events vs)
337 (filter-map get-forced-event (events vs))))
338 ;; end part-combine-events
340 ;; forced-result: Take the previous config and analyse whether
341 ;; any change happened.... Return new once and permanent config
342 (define (forced-result evt state)
343 ;; sanity check, evt should always be (new-state . once)
344 (if (not (and (pair? evt) (pair? state)))
347 ;; Once-event, leave permanent state unchanged
348 (cons (car evt) (cdr state))
349 ;; permanent change, leave once state unchanged
350 (cons (car state) (car evt)))))
351 ;; end forced-combine-result
353 ;; body of analyse-forced-combine:
354 (if (< result-idx (vector-length result))
355 (let* ((now-state (vector-ref result result-idx)) ; current result
356 ;; Extract all part-combine force events
357 (evts (if (synced? now-state)
359 (part-combine-events (car (voice-states now-state)))
360 (part-combine-events (cdr (voice-states now-state))))
362 ;; result is (once-state permament-state):
363 (state (fold forced-result (cons 'automatic prev-res) evts))
364 ;; Now let once override permanent changes:
365 (force-state (if (equal? (car state) 'automatic)
368 (set! (forced-configuration (vector-ref result result-idx))
370 ;; For the next moment, ignore the once override (car stat)
371 ;; and pass on the permanent override, stored as (cdr state)
372 (analyse-forced-combine (1+ result-idx) (cdr state)))))
373 ;; end analyse-forced-combine
376 (define (analyse-time-step result-idx)
377 (define (put x . index)
378 "Put the result to X, starting from INDEX backwards.
380 Only set if not set previously.
382 (let ((i (if (pair? index) (car index) result-idx)))
384 (not (symbol? (configuration (vector-ref result i)))))
386 (set! (configuration (vector-ref result i)) x)
389 (define (copy-state-from state-vec vs)
390 (define (copy-one-state key-idx)
391 (let* ((idx (cdr key-idx))
392 (prev-ss (vector-ref result idx))
393 (prev (configuration prev-ss)))
396 (for-each copy-one-state (span-state vs)))
398 (define (analyse-notes now-state)
399 (let* ((vs1 (car (voice-states now-state)))
400 (vs2 (cdr (voice-states now-state)))
401 (notes1 (comparable-note-events vs1))
402 (notes2 (comparable-note-events vs2)))
404 ;; if neither part has notes, do nothing
405 ((and (not (pair? notes1)) (not (pair? notes2))))
407 ;; if one part has notes and the other does not
408 ((or (not (pair? notes1)) (not (pair? notes2))) (put 'apart))
410 ;; if either part has a chord
411 ((or (> (length notes1) 1)
412 (> (length notes2) 1))
413 (if (and (<= chord-min-diff 0) ; user requests combined unisons
414 (equal? notes1 notes2)) ; both parts have the same chord
418 ;; if the durations are different
419 ;; TODO articulations too?
420 ((and (not (equal? (ly:event-property (car notes1) 'duration)
421 (ly:event-property (car notes2) 'duration))))
425 ;; Is the interval outside of chord-range?
426 (if (let ((diff (ly:pitch-steps
428 (ly:event-property (car notes1) 'pitch)
429 (ly:event-property (car notes2) 'pitch)))))
430 (or (< diff chord-min-diff)
431 (> diff chord-max-diff)
434 ;; copy previous split state from spanner state
436 (if (previous-voice-state vs1)
437 (copy-state-from voice-state-vec1
438 (previous-voice-state vs1)))
439 (if (previous-voice-state vs2)
440 (copy-state-from voice-state-vec2
441 (previous-voice-state vs2)))
442 (if (and (null? (span-state vs1)) (null? (span-state vs2)))
445 (if (< result-idx (vector-length result))
446 (let* ((now-state (vector-ref result result-idx))
447 (vs1 (car (voice-states now-state)))
448 (vs2 (cdr (voice-states now-state))))
450 (cond ((not vs1) (put 'apart))
451 ((not vs2) (put 'apart))
453 (let ((active1 (previous-span-state vs1))
454 (active2 (previous-span-state vs2))
455 (new-active1 (span-state vs1))
456 (new-active2 (span-state vs2)))
458 (display (list (moment now-state) result-idx
459 active1 "->" new-active1
460 active2 "->" new-active2
462 (if (and (synced? now-state)
463 (equal? active1 active2)
464 (equal? new-active1 new-active2))
465 (analyse-notes now-state)
467 ;; active states different:
470 ;; go to the next one, if it exists.
471 (analyse-time-step (1+ result-idx)))))))
473 (define (analyse-a2 result-idx)
474 (if (< result-idx (vector-length result))
475 (let* ((now-state (vector-ref result result-idx))
476 (vs1 (car (voice-states now-state)))
477 (vs2 (cdr (voice-states now-state))))
479 (define (analyse-synced-silence)
480 (let ((rests1 (if vs1 (rest-and-skip-events vs1) '()))
481 (rests2 (if vs2 (rest-and-skip-events vs2) '())))
484 ;; multi-measure rests (probably), which the
485 ;; part-combine iterator handles well
486 ((and (= 0 (length rests1))
487 (= 0 (length rests2)))
488 (set! (configuration now-state) 'unisilence))
490 ;; equal rests or equal skips, but not one of each
491 ((and (= 1 (length rests1))
492 (= 1 (length rests2))
493 (equal? (ly:event-property (car rests1) 'class)
494 (ly:event-property (car rests2) 'class))
495 (equal? (ly:event-property (car rests1) 'duration)
496 (ly:event-property (car rests2) 'duration)))
497 (set! (configuration now-state) 'unisilence))
499 ;; rests of different durations or mixed with
500 ;; skips or multi-measure rests
502 ;; TODO For skips, route the rest to the shared
503 ;; voice and the skip to the voice for its part?
504 (set! (configuration now-state) 'apart-silence))
508 (define (analyse-unsynced-silence vs1 vs2)
509 (let ((any-mmrests1 (if vs1 (any-mmrest-events vs1) #f))
510 (any-mmrests2 (if vs2 (any-mmrest-events vs2) #f)))
512 ;; If a multi-measure rest begins now while the other
513 ;; part has an ongoing multi-measure rest (or has
514 ;; ended), start displaying the one that begins now.
516 (equal? (moment vs1) (moment now-state))
517 (or (not vs2) any-mmrests2))
518 (set! (configuration now-state) 'silence1))
520 ;; as above with parts swapped
522 (equal? (moment vs2) (moment now-state))
523 (or (not vs1) any-mmrests1))
524 (set! (configuration now-state) 'silence2))
528 (let ((notes1 (if vs1 (comparable-note-events vs1) '()))
529 (notes2 (if vs2 (comparable-note-events vs2) '())))
530 (cond ((and (equal? (configuration now-state) 'chords)
532 (equal? notes1 notes2))
533 (set! (configuration now-state) 'unisono))
536 (if (and (= 0 (length notes1))
537 (= 0 (length notes2)))
538 (analyse-synced-silence)))
540 (else ;; not synchronized
542 (current-or-previous-voice-states now-state))
546 (or (not vs1) (= 0 (length (note-events vs1))))
547 (or (not vs2) (= 0 (length (note-events vs2)))))
548 (analyse-unsynced-silence vs1 vs2))))
550 (analyse-a2 (1+ result-idx)))))
552 (define (analyse-solo12 result-idx)
554 (define (previous-config vs)
555 (let* ((pvs (previous-voice-state vs))
556 (spi (if pvs (split-index pvs) #f))
557 (prev-split (if spi (vector-ref result spi) #f)))
559 (configuration prev-split)
562 (define (put-range x a b)
563 ;; (display (list "put range " x a b "\n"))
566 (set! (configuration (vector-ref result i)) x)))
569 ;; (display (list "putting " x "\n"))
570 (set! (configuration (vector-ref result result-idx)) x))
572 (define (current-voice-state now-state voice-num)
573 (define vs ((if (= 1 voice-num) car cdr)
574 (voice-states now-state)))
575 (if (or (not vs) (equal? (moment now-state) (moment vs)))
577 (previous-voice-state vs)))
579 (define (try-solo type start-idx current-idx)
580 "Find a maximum stretch that can be marked as solo. Only set
581 the mark when there are no spanners active.
583 return next idx to analyse.
585 (if (< current-idx (vector-length result))
586 (let* ((now-state (vector-ref result current-idx))
587 (solo-state (current-voice-state now-state (if (equal? type 'solo1) 1 2)))
588 (silent-state (current-voice-state now-state (if (equal? type 'solo1) 2 1)))
589 (silent-notes (if silent-state (note-events silent-state) '()))
590 (solo-notes (if solo-state (note-events solo-state) '())))
591 ;; (display (list "trying " type " at " (moment now-state) solo-state silent-state "\n"))
592 (cond ((not (equal? (configuration now-state) 'apart))
594 ((> (length silent-notes) 0) start-idx)
596 (put-range type start-idx current-idx)
599 (null? (span-state solo-state)))
602 ;; This includes rests. This isn't a problem: long rests
603 ;; will be shared with the silent voice, and be marked
604 ;; as unisilence. Therefore, long rests won't
605 ;; accidentally be part of a solo.
607 (put-range type start-idx current-idx)
608 (try-solo type (1+ current-idx) (1+ current-idx)))
610 (try-solo type start-idx (1+ current-idx)))))
614 (define (analyse-apart-silence result-idx)
615 "Analyse 'apart-silence starting at RESULT-IDX. Return next index."
616 (let* ((now-state (vector-ref result result-idx))
617 (vs1 (current-voice-state now-state 1))
618 (vs2 (current-voice-state now-state 2))
619 (rests1 (if vs1 (rest-and-skip-events vs1) '()))
620 (rests2 (if vs2 (rest-and-skip-events vs2) '()))
621 (prev-state (if (> result-idx 0)
622 (vector-ref result (- result-idx 1))
624 (prev-config (if prev-state
625 (configuration prev-state)
628 ;; rest with multi-measure rest: choose the rest
629 ((and (synced? now-state)
630 (= 1 (length rests1))
631 (ly:in-event-class? (car rests1) 'rest-event)
632 (= 0 (length rests2))) ; probably mmrest
635 ;; as above with parts swapped
636 ((and (synced? now-state)
637 (= 1 (length rests2))
638 (ly:in-event-class? (car rests2) 'rest-event)
639 (= 0 (length rests1))) ; probably mmrest
643 (put 'apart-silence))
645 ;; remain in the silence1/2 states until resync
646 ((equal? prev-config 'silence1)
649 ((equal? prev-config 'silence2)
653 (put 'apart-silence)))
657 (define (analyse-apart result-idx)
658 "Analyse 'apart starting at RESULT-IDX. Return next index."
659 (let* ((now-state (vector-ref result result-idx))
660 (vs1 (current-voice-state now-state 1))
661 (vs2 (current-voice-state now-state 2))
662 ;; (vs1 (car (voice-states now-state)))
663 ;; (vs2 (cdr (voice-states now-state)))
664 (notes1 (if vs1 (note-events vs1) '()))
665 (notes2 (if vs2 (note-events vs2) '()))
667 (n2 (length notes2)))
668 ;; (display (list "analyzing step " result-idx " moment " (moment now-state) vs1 vs2 "\n"))
670 ;; we should always increase.
671 (cond ((and (= n1 0) (= n2 0))
672 ;; If we hit this, it means that the previous passes
673 ;; have designated as 'apart what is really
675 (analyse-apart-silence result-idx))
677 (equal? (moment vs1) (moment now-state))
678 (null? (previous-span-state vs1)))
679 (try-solo 'solo1 result-idx result-idx))
681 (equal? (moment vs2) (moment now-state))
682 (null? (previous-span-state vs2)))
683 (try-solo 'solo2 result-idx result-idx))
685 (else (1+ result-idx)))
689 (if (< result-idx (vector-length result))
690 (let ((conf (configuration (vector-ref result result-idx))))
692 ((equal? conf 'apart)
693 (analyse-solo12 (analyse-apart result-idx)))
694 ((equal? conf 'apart-silence)
695 (analyse-solo12 (analyse-apart-silence result-idx)))
697 (analyse-solo12 (1+ result-idx))))))) ; analyse-solo12
699 (analyse-spanner-states voice-state-vec1)
700 (analyse-spanner-states voice-state-vec2)
703 (display voice-state-vec1)
705 (display voice-state-vec2)
710 ;; Extract all forced combine strategies, i.e. events inserted by
711 ;; \partcombine(Apart|Automatic|SoloI|SoloII|Chords)[Once]
712 ;; They will in the end override the automaically determined ones.
713 ;; Initial state for both voices is no override
714 (analyse-forced-combine 0 #f)
715 ;; Now go through all time steps in a loop and find a combination strategy
716 ;; based only on the events of that one moment (i.e. neglecting longer
717 ;; periods of solo/apart, etc.)
718 (analyse-time-step 0)
720 ;; Check for unisono or unisilence moments
726 ;; forced-configuration overrides, if it is set
727 (lambda (x) (cons (moment x) (or (forced-configuration x) (configuration x))))
728 (vector->list result)))
733 (define-public default-part-combine-mark-state-machine
734 ;; (current-state . ((split-state-event .
735 ;; (output-voice output-event next-state)) ...))
736 '((Initial . ((solo1 . (solo SoloOneEvent Solo1))
737 (solo2 . (solo SoloTwoEvent Solo2))
738 (unisono . (shared UnisonoEvent Unisono))))
739 (Solo1 . ((apart . (#f #f Initial))
740 (chords . (#f #f Initial))
741 (solo2 . (solo SoloTwoEvent Solo2))
742 (unisono . (shared UnisonoEvent Unisono))))
743 (Solo2 . ((apart . (#f #f Initial))
744 (chords . (#f #f Initial))
745 (solo1 . (solo SoloOneEvent Solo1))
746 (unisono . (shared UnisonoEvent Unisono))))
747 (Unisono . ((apart . (#f #f Initial))
748 (chords . (#f #f Initial))
749 (solo1 . (solo SoloOneEvent Solo1))
750 (solo2 . (solo SoloTwoEvent Solo2))))))
752 (define-public (make-part-combine-marks state-machine split-list)
753 "Generate a sequence of part combiner events from a split list"
755 (define (get-state state-name)
756 (assq-ref state-machine state-name))
758 (let ((full-seq '()) ; sequence of { \context Voice = "x" {} ... }
759 (segment '()) ; sequence within \context Voice = "x" {...}
760 (prev-moment ZERO-MOMENT)
762 (state (get-state 'Initial)))
764 (define (commit-segment)
765 "Add the current segment to the full sequence and begin another."
768 (cons (make-music 'ContextSpeccedMusic
769 'context-id (symbol->string prev-voice)
771 'element (make-sequential-music (reverse! segment)))
775 (define (handle-split split)
776 (let* ((moment (car split))
777 (action (assq-ref state (cdr split))))
779 (let ((voice (car action))
780 (part-combine-event (cadr action))
781 (next-state-name (caddr action)))
782 (if part-combine-event
783 (let ((dur (ly:moment-sub moment prev-moment)))
784 ;; start a new segment when the voice changes
785 (if (not (eq? voice prev-voice))
788 (set! prev-voice voice)))
789 (if (not (equal? dur ZERO-MOMENT))
790 (set! segment (cons (make-music 'SkipEvent
791 'duration (make-duration-of-length dur)) segment)))
792 (set! segment (cons (make-music part-combine-event) segment))
794 (set! prev-moment moment)))
795 (set! state (get-state next-state-name))))))
797 (for-each handle-split split-list)
799 (make-sequential-music (reverse! full-seq))))
801 ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
803 (define-public (add-quotable parser name mus)
804 (let* ((tab (eval 'musicQuotes (current-module)))
805 (voicename (get-next-unique-voice-name))
806 ;; recording-group-emulate returns an assoc list (reversed!), so
807 ;; hand it a proper unique context name and extract that key:
808 (ctx-spec (context-spec-music mus 'Voice voicename))
809 (listener (ly:parser-lookup parser 'partCombineListener))
810 (context-list (reverse (recording-group-emulate ctx-spec listener)))
811 (raw-voice (assoc voicename context-list))
812 (quote-contents (if (pair? raw-voice) (cdr raw-voice) '())))
814 ;; If the context-specced quoted music does not contain anything, try to
815 ;; use the first child, i.e. the next in context-list after voicename
816 ;; That's the case e.g. for \addQuote "x" \relative c \new Voice {...}
817 (if (null? quote-contents)
818 (let find-non-empty ((current-tail (member raw-voice context-list)))
819 ;; if voice has contents, use them, otherwise check next ctx
820 (cond ((null? current-tail) #f)
821 ((and (pair? (car current-tail))
822 (pair? (cdar current-tail)))
823 (set! quote-contents (cdar current-tail)))
824 (else (find-non-empty (cdr current-tail))))))
826 (if (not (null? quote-contents))
827 (hash-set! tab name (list->vector (reverse! quote-contents '())))
828 (ly:music-warning mus (ly:format (_ "quoted music `~a' is empty") name)))))