-;;;; part-combiner.scm -- Part combining, staff changes.
+;;;; This file is part of LilyPond, the GNU music typesetter.
;;;;
-;;;; source file of the GNU LilyPond music typesetter
-;;;;
-;;;; (c) 2004--2009 Han-Wen Nienhuys <hanwen@xs4all.nl>
+;;;; Copyright (C) 2004--2011 Han-Wen Nienhuys <hanwen@xs4all.nl>
+;;;;
+;;;; 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/>.
;; todo: figure out how to make module,
;; without breaking nested ly scopes
;; of (SYMBOL . RESULT-INDEX), which indicates where
;; said spanner was started.
(spanner-state #:init-value '() #:accessor span-state))
-
+
(define-method (write (x <Voice-state> ) file)
(display (when x) file)
(display " evs = " file)
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
(define-class <Split-state> ()
+ ;; The automatically determined split configuration
(configuration #:init-value '() #:accessor configuration)
+ ;; Allow overriding split configuration, takes precedence over configuration
+ (forced-configuration #:init-value #f #:accessor forced-configuration)
(when-moment #:accessor when #:init-keyword #:when)
;; voice-states are states starting with the Split-state or later
;;
(is #:init-keyword #:voice-states #:accessor voice-states)
(synced #:init-keyword #:synced #:init-value #f #:getter synced?))
-
+
(define-method (write (x <Split-state> ) f)
(display (when x) f)
"Merge lists VS1 and VS2, containing Voice-state objects into vector
of Split-state objects, crosslinking the Split-state vector and
Voice-state objects
-"
+"
(define (helper ss-idx ss-list idx1 idx2)
(let* ((state1 (if (< idx1 (vector-length vs1)) (vector-ref vs1 idx1) #f))
(state2 (if (< idx2 (vector-length vs2)) (vector-ref vs2 idx2) #f))
(define (helper index active)
"Analyse EVS at INDEX, given state ACTIVE."
-
+
(define (analyse-tie-start active ev)
(if (equal? (ly:event-property ev 'class) 'tie-event)
(acons 'tie (split-index (vector-ref voice-state-vec index))
active)
active))
-
+
(define (analyse-tie-end active ev)
(if (equal? (ly:event-property ev 'class) 'note-event)
(assoc-remove! active 'tie)
(equal? STOP (ly:event-property ev 'span-direction))))
(assoc-remove! (assoc-remove! active 'cresc) 'decr)
active))
-
+
(define (active<? a b)
(cond ((symbol<? (car a) (car b)) #t)
((symbol<? (car b) (car b)) #f)
(else (< (cdr a) (cdr b)))))
-
+
(define (analyse-span-event active ev)
(let* ((name (ly:event-property ev 'class))
(key (cond ((equal? name 'slur-event) 'slur)
(set! (span-state (vector-ref voice-state-vec index))
(list-copy active))
(helper (1+ index) active))))
-
+
(helper 0 '()))
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
-(define-public (recording-group-emulate music odef)
- "Interprets music according to odef, but stores all events in a chronological list, similar to the Recording_group_engraver in 2.8 and earlier"
+(define-public (recording-group-emulate music odef)
+ "Interpret @var{music} according to @var{odef}, but store all events
+in a chronological list, similar to the @code{Recording_group_engraver} in
+LilyPond version 2.8 and earlier."
(let*
- ((context-list '())
- (now-mom (ly:make-moment 0 0))
- (global (ly:make-global-context odef))
- (mom-listener (ly:make-listener
- (lambda (tev)
- (set! now-mom (ly:event-property tev 'moment)))))
- (new-context-listener
- (ly:make-listener
- (lambda (sev)
- (let*
- ((child (ly:event-property sev 'context))
- (this-moment-list
- (cons (ly:context-id child) '()))
- (dummy
- (set! context-list (cons this-moment-list context-list)))
- (acc '())
- (accumulate-event-listener
- (ly:make-listener (lambda (ev)
- (set! acc (cons (cons ev #t) acc)))))
- (save-acc-listener (ly:make-listener (lambda (tev)
- (if (pair? acc)
- (let ((this-moment (cons (cons now-mom (ly:context-property child 'instrumentTransposition))
- acc)))
- (set-cdr! this-moment-list (cons this-moment (cdr this-moment-list)))
- (set! acc '())))))))
- (ly:add-listener accumulate-event-listener (ly:context-event-source child) 'music-event)
- (ly:add-listener save-acc-listener (ly:context-event-source global) 'OneTimeStep))))))
- (ly:add-listener new-context-listener (ly:context-events-below global) 'AnnounceNewContext)
+ ((context-list '())
+ (now-mom (ly:make-moment 0 0))
+ (global (ly:make-global-context odef))
+ (mom-listener (ly:make-listener
+ (lambda (tev) (set! now-mom (ly:event-property tev 'moment)))))
+ (new-context-listener
+ (ly:make-listener
+ (lambda (sev)
+ (let*
+ ((child (ly:event-property sev 'context))
+ (this-moment-list (cons (ly:context-id child) '()))
+ (dummy (set! context-list (cons this-moment-list context-list)))
+ (acc '())
+ (accumulate-event-listener
+ (ly:make-listener (lambda (ev)
+ (set! acc (cons (cons ev #t) acc)))))
+ (save-acc-listener
+ (ly:make-listener (lambda (tev)
+ (if (pair? acc)
+ (let ((this-moment
+ (cons (cons now-mom
+ (ly:context-property child 'instrumentTransposition))
+ ;; The accumulate-event-listener above creates
+ ;; the list of events in reverse order, so we
+ ;; have to revert it to the original order again
+ (reverse acc))))
+ (set-cdr! this-moment-list
+ (cons this-moment (cdr this-moment-list)))
+ (set! acc '())))))))
+ (ly:add-listener accumulate-event-listener
+ (ly:context-event-source child) 'StreamEvent)
+ (ly:add-listener save-acc-listener
+ (ly:context-event-source global) 'OneTimeStep))))))
+ (ly:add-listener new-context-listener
+ (ly:context-events-below global) 'AnnounceNewContext)
(ly:add-listener mom-listener (ly:context-event-source global) 'Prepare)
(ly:interpret-music-expression (make-non-relative-music music) global)
context-list))
(listener (ly:parser-lookup parser 'partCombineListener))
(evs2 (recording-group-emulate m2 listener))
(evs1 (recording-group-emulate m1 listener)))
-
+
(set! (ly:music-property m 'elements) (list m1 m2))
(set! (ly:music-property m 'split-list)
- (if (and (assoc "one" evs1) (assoc "two" evs2))
- (determine-split-list (reverse! (cdr (assoc "one" evs1)) '())
- (reverse! (cdr (assoc "two" evs2)) '()))
- '() ))
+ (if (and (assoc "one" evs1) (assoc "two" evs2))
+ (determine-split-list (reverse! (assoc-get "one" evs1) '())
+ (reverse! (assoc-get "two" evs2) '()))
+ '()))
m))
(define-public (determine-split-list evl1 evl2)
- "EVL1 and EVL2 should be ascending"
+ "@var{evl1} and @var{evl2} should be ascending."
(let* ((pc-debug #f)
(chord-threshold 8)
(voice-state-vec1 (make-voice-states evl1))
(voice-state-vec2 (make-voice-states evl2))
(result (make-split-state voice-state-vec1 voice-state-vec2)))
-
+
+ ;; Go through all moments recursively and check if the events of that
+ ;; moment contain a part-combine-force-event override. If so, store its
+ ;; value in the forced-configuration field, which will override. The
+ ;; previous configuration is used to determine non-terminated settings.
+ (define (analyse-forced-combine result-idx prev-res)
+
+ (define (get-forced-event x)
+ (if (ly:in-event-class? x 'part-combine-force-event)
+ (cons (ly:event-property x 'forced-type) (ly:event-property x 'once))
+ #f))
+ (define (part-combine-events vs)
+ (if (not vs)
+ '()
+ (filter-map get-forced-event (events vs))))
+ ;; end part-combine-events
+
+ ;; forced-result: Take the previous config and analyse whether
+ ;; any change happened.... Return new once and permanent config
+ (define (forced-result evt state)
+ ;; sanity check, evt should always be (new-state . once)
+ (if (not (and (pair? evt) (pair? state)))
+ state
+ (if (cdr evt)
+ ;; Once-event, leave permanent state unchanged
+ (cons (car evt) (cdr state))
+ ;; permanent change, leave once state unchanged
+ (cons (car state) (car evt)))))
+ ;; end forced-combine-result
+
+ ;; body of analyse-forced-combine:
+ (if (< result-idx (vector-length result))
+ (let* ((now-state (vector-ref result result-idx)) ; current result
+ ;; Extract all part-combine force events
+ (ev1 (part-combine-events (car (voice-states now-state))))
+ (ev2 (part-combine-events (cdr (voice-states now-state))))
+ (evts (append ev1 ev2))
+ ;; result is (once-state permament-state):
+ (state (fold forced-result (cons 'automatic prev-res) evts))
+ ;; Now let once override permanent changes:
+ (force-state (if (equal? (car state) 'automatic)
+ (cdr state)
+ (car state))))
+ (set! (forced-configuration (vector-ref result result-idx))
+ force-state)
+ ;; For the next moment, ignore the once override (car stat)
+ ;; and pass on the permanent override, stored as (cdr state)
+ (analyse-forced-combine (1+ result-idx) (cdr state)))))
+ ;; end analyse-forced-combine
+
+
(define (analyse-time-step result-idx)
(define (put x . index)
"Put the result to X, starting from INDEX backwards.
(begin
(set! (configuration (vector-ref result i)) x)
(put x (1- i))))))
-
+
(define (copy-state-from state-vec vs)
(define (copy-one-state key-idx)
(let* ((idx (cdr key-idx))
(previous-voice-state vs2)))
(if (and (null? (span-state vs1)) (null? (span-state vs2)))
(put 'chords)))))))))
-
+
(if (< result-idx (vector-length result))
(let* ((now-state (vector-ref result result-idx))
(vs1 (car (voice-states now-state)))
(vs2 (cdr (voice-states now-state))))
-
+
(cond ((not vs1) (put 'apart))
((not vs2) (put 'apart))
(else
(equal? active1 active2)
(equal? new-active1 new-active2))
(analyse-notes now-state)
-
+
;; active states different:
(put 'apart)))
-
+
;; go to the next one, if it exists.
(analyse-time-step (1+ result-idx)))))))
-
+
(define (analyse-a2 result-idx)
(if (< result-idx (vector-length result))
(let* ((now-state (vector-ref result result-idx))
(vs2 (cdr (voice-states now-state))))
(if (and (equal? (configuration now-state) 'chords)
vs1 vs2)
- (let ((notes1 (note-events vs1))
+ (let ((notes1 (note-events vs1))
(notes2 (note-events vs2)))
(cond ((and (= 1 (length notes1))
(= 1 (length notes2))
(= 0 (length notes2)))
(set! (configuration now-state) 'unisilence)))))
(analyse-a2 (1+ result-idx)))))
-
+
(define (analyse-solo12 result-idx)
-
+
(define (previous-config vs)
(let* ((pvs (previous-voice-state vs))
(spi (if pvs (split-index pvs) #f))
(if prev-split
(configuration prev-split)
'apart)))
-
+
(define (put-range x a b)
;; (display (list "put range " x a b "\n"))
(do ((i a (1+ i)))
((> i b) b)
(set! (configuration (vector-ref result i)) x)))
-
+
(define (put x)
;; (display (list "putting " x "\n"))
(set! (configuration (vector-ref result result-idx)) x))
-
+
(define (current-voice-state now-state voice-num)
(define vs ((if (= 1 voice-num) car cdr)
(voice-states now-state)))
(if (or (not vs) (equal? (when now-state) (when vs)))
vs
(previous-voice-state vs)))
-
+
(define (try-solo type start-idx current-idx)
- "Find a maximum stretch that can be marked as solo. Only set
+ "Find a maximum stretch that can be marked as solo. Only set
the mark when there are no spanners active.
return next idx to analyse.
;;
;; This includes rests. This isn't a problem: long rests
;; will be shared with the silent voice, and be marked
- ;; as unisilence. Therefore, long rests won't
+ ;; as unisilence. Therefore, long rests won't
;; accidentally be part of a solo.
;;
(put-range type start-idx current-idx)
(try-solo type start-idx (1+ current-idx)))))
;; try-solo
start-idx))
-
+
(define (analyse-moment result-idx)
- "Analyse 'apart starting at RESULT-IDX. Return next index. "
+ "Analyse 'apart starting at RESULT-IDX. Return next index."
(let* ((now-state (vector-ref result result-idx))
(vs1 (current-voice-state now-state 1))
(vs2 (current-voice-state now-state 2))
(equal? (when vs2) (when now-state))
(null? (previous-span-state vs2)))
(try-solo 'solo2 result-idx result-idx))
-
+
(else (1+ result-idx)))
;; analyse-moment
(1+ result-idx))))
-
+
(if (< result-idx (vector-length result))
(if (equal? (configuration (vector-ref result result-idx)) 'apart)
(analyse-solo12 (analyse-moment result-idx))
(display "***\n")
(display result)
(display "***\n")))
+
+ ;; Extract all forced combine strategies, i.e. events inserted by
+ ;; \partcombine(Apart|Automatic|SoloI|SoloII|Chords)[Once]
+ ;; They will in the end override the automaically determined ones.
+ ;; Initial state for both voices is no override
+ (analyse-forced-combine 0 #f)
+ ;; Now go through all time steps in a loop and find a combination strategy
+ ;; based only on the events of that one moment (i.e. neglecting longer
+ ;; periods of solo/apart, etc.)
(analyse-time-step 0)
;; (display result)
+ ;; Check for unisono or unisilence moments
(analyse-a2 0)
;;(display result)
(analyse-solo12 0)
;; (display result)
(set! result (map
- (lambda (x) (cons (when x) (configuration x)))
+ ;; forced-configuration overrides, if it is set
+ (lambda (x) (cons (when x) (or (forced-configuration x) (configuration x))))
(vector->list result)))
(if #f ;; pc-debug
(display result))
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