Spaces:
Sleeping
Sleeping
File size: 7,135 Bytes
f65fe85 |
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 |
;;;; This file is part of LilyPond, the GNU music typesetter.
;;;;
;;;; Copyright (C) 1998--2020 Han-Wen Nienhuys <[email protected]>
;;;; Jan Nieuwenhuizen <[email protected]>
;;;; Neil Puttock <[email protected]>
;;;; Carl Sorensen <[email protected]>
;;;;
;;;; 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: should link back into user manual.
(define (mm-rest-child-list music)
"Generate events for multimeasure rests,
to be used by the sequential-iterator"
(ly:set-origin! (list (make-music 'BarCheck)
(make-music 'MultiMeasureRestEvent
(ly:music-deep-copy music))
(make-music 'BarCheck))
music))
(define (make-unfolded-set music)
(let ((n (ly:music-property music 'repeat-count))
(alts (ly:music-property music 'elements))
(body (ly:music-property music 'element)))
(cond ((<= n 0) '())
((null? alts) (make-list n body))
(else
(concatenate
(zip (make-list n body)
(append! (make-list (max 0 (- n (length alts)))
(car alts))
alts)))))))
(define (make-volta-set music)
(let* ((alts (ly:music-property music 'elements))
(lalts (length alts))
(times (ly:music-property music 'repeat-count)))
(map (lambda (x y)
(make-music
'SequentialMusic
'elements
;; set properties for proper bar numbering
(append
(list (make-music 'AlternativeEvent
'alternative-dir (if (= y 0)
-1
0)
'alternative-increment
(if (= 0 y)
(1+ (- times
lalts))
1)))
(list x)
(if (= y (1- lalts))
(list (make-music 'AlternativeEvent
'alternative-dir 1
'alternative-increment 0))
'()))))
alts
(iota lalts))))
(define (make-ottava-set music)
"Set context properties for an ottava bracket."
(let ((octavation (ly:music-property music 'ottava-number)))
(list (context-spec-music
(make-apply-context
(lambda (context)
(let* ((offset (* -7 octavation))
(markups (ly:context-property context 'ottavationMarkups))
(ottavation-markup (assoc-get octavation markups)))
(set! (ly:context-property context 'middleCOffset) offset)
(set! (ly:context-property context 'ottavation) ottavation-markup)
(if (and (not (zero? octavation))
(not (markup? ottavation-markup)))
(ly:warning "Could not find ottavation markup for ~a octaves up." octavation))
(ly:set-middle-C! context))))
'Staff))))
(define (make-time-signature-set music)
"Set context properties for a time signature."
(let* ((num (ly:music-property music 'numerator))
(den (ly:music-property music 'denominator))
(structure (ly:music-property music 'beat-structure))
(fraction (cons num den)))
(list (context-spec-music
(make-apply-context
(lambda (context)
(let* ((time-signature-settings
(ly:context-property context 'timeSignatureSettings))
(my-base-length
(base-length fraction time-signature-settings))
(my-beat-structure
(if (null? structure)
(beat-structure my-base-length
fraction
time-signature-settings)
structure))
(beaming-exception
(beam-exceptions fraction time-signature-settings))
(new-measure-length (ly:make-moment num den)))
(ly:context-set-property!
context 'timeSignatureFraction fraction)
(ly:context-set-property!
context 'baseMoment (ly:make-moment my-base-length))
(ly:context-set-property!
context 'beatStructure my-beat-structure)
(ly:context-set-property!
context 'beamExceptions beaming-exception)
(ly:context-set-property!
context 'measureLength new-measure-length))))
'Timing)
;; (make-music 'TimeSignatureEvent music) would always
;; create a Bottom context. So instead, we just send the
;; event to whatever context may be currently active. If
;; that is not contained within an existing context with
;; TimeSignatureEngraver at the time \time is iterated, it
;; will drop through the floor which mostly means that
;; point&click and tweaks are not available for any time
;; signatures engraved due to the Timing property changes
;; but without a \time of its own. This is more a
;; "notification" rather than an "event" (which is always
;; sent to Bottom) but we don't currently have iterators for
;; that.
(descend-to-context
(make-apply-context
(lambda (context)
(ly:broadcast (ly:context-event-source context)
(ly:make-stream-event
(ly:make-event-class 'time-signature-event)
(ly:music-mutable-properties music)))))
'Score))))
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; Some MIDI callbacks -- is this a good place for them?
(define-public (breathe::midi-length len context)
;;Shorten by half, or by up to a second, but always by a power of 2
(let* ((desired (min (ly:moment-main (seconds->moment 1 context))
(* (ly:moment-main len) 1/2)))
(scale (inexact->exact (ceiling (/ (log desired) (log 1/2)))))
(breath (ly:make-moment (expt 1/2 scale))))
(ly:moment-sub (ly:make-moment (ly:moment-main len)) breath)))
|