--- /dev/null
+%%%% This file is part of LilyPond, the GNU music typesetter.
+%%%%
+%%%% Copyright (C) 2011--2012 Graham Percival <graham@percival-music.ca>
+%%%%
+%%%% 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/>.
+%
+%
+%
+% This file is used for Vivi, the Virtual Violinist:
+% http://percival-music.ca/vivi.html
+% but it may be helpful to other researchers, either with the same
+% output, or as a basis for other work in extracting music events
+% from lilypond.
+%
+% Output format is tab-separated lines, like this:
+%0.00000000 note 57 0.25000000 point-and-click 2 38
+%0.00000000 dynamic f
+%0.25000000 note 62 0.25000000 point-and-click 7 38
+%0.50000000 note 66 0.12500000 point-and-click 9 38
+%0.50000000 script staccato
+
+
+
+\version "2.16.0"
+
+%%%% Helper functions
+
+#(define (filename-from-staffname context)
+ "Constructs a filename in the form
+@file{@var{original_filename}-@var{staff_instrument_name}.notes} if the
+staff has an instrument name. If the staff has no instrument
+name, it uses "unnamed-staff" for that part of the filename."
+ (let* ((inst-name (ly:context-property context 'instrumentName)))
+ (string-concatenate (list
+ (substring (object->string (command-line))
+ ;; filename without .ly part
+ (+ (string-rindex (object->string (command-line)) #\sp) 2)
+ (- (string-length (object->string (command-line))) 5))
+ "-"
+ (if (string? inst-name)
+ inst-name
+ "unnamed-staff")
+ ".notes"))))
+
+#(define (format-moment moment)
+ (exact->inexact
+ (/ (ly:moment-main-numerator moment)
+ (ly:moment-main-denominator moment))))
+
+#(define (moment-grace->string moment)
+ "Prints a moment without grace note(s) as a float such as
+0.25000. Grace notes are written with the grace duration as a
+separate \"dashed\" number, i.e. 0.25000-0.12500. This allows any
+program using the output of this function to interpret grace notes
+however they want (half duration, quarter duration? before beat,
+after beat? etc.)."
+ (if
+ (eq? 0 (ly:moment-grace-numerator moment))
+ (ly:format "~a" (format-moment moment))
+ ;; grace notes have a negative numerator, so no "-" necessary
+ (ly:format
+ "~a~a"
+ (format-moment moment)
+ (format-moment
+ (ly:make-moment
+ (ly:moment-grace-numerator moment)
+ (ly:moment-grace-denominator moment))))))
+
+#(define (make-output-string-line context values)
+ "Constructs a tab-separated string beginning with the
+score time (derived from the context) and then adding all the
+values. The string ends with a newline."
+ (let* ((moment (ly:context-current-moment context)))
+ (string-append
+ (string-join
+ (append
+ (list (moment-grace->string moment))
+ (map
+ (lambda (x) (ly:format "~a" x))
+ values))
+ "\t")
+ "\n")))
+
+
+#(define (print-line context . values)
+ "Prints the list of values (plus the score time) to a file, and
+optionally outputs to the console as well. context may be specified
+as an engraver for convenience."
+ (if (ly:translator? context)
+ (set! context (ly:translator-context context)))
+ (let* ((p (open-file (filename-from-staffname context) "a")))
+ ;; for regtest comparison
+ (if (defined? 'EVENT_LISTENER_CONSOLE_OUTPUT)
+ (ly:progress
+ (make-output-string-line context values)))
+ (display
+ (make-output-string-line context values)
+ p)
+ (close p)))
+
+
+%%% main functions
+
+#(define (format-rest engraver event)
+ (print-line engraver
+ "rest"
+ (ly:duration->string
+ (ly:event-property event 'duration))
+ (format-moment (ly:duration-length
+ (ly:event-property event 'duration)))))
+
+#(define (format-note engraver event)
+ (let* ((origin (ly:input-file-line-char-column
+ (ly:event-property event 'origin))))
+ (print-line engraver
+ "note"
+ ;; get a MIDI pitch value.
+ (+ 60 (ly:pitch-semitones
+ (ly:event-property event 'pitch)))
+ (ly:duration->string
+ (ly:event-property event 'duration))
+ (format-moment (ly:duration-length
+ (ly:event-property event 'duration)))
+ ;; point and click info
+ (ly:format "point-and-click ~a ~a"
+ (caddr origin)
+ (cadr origin)))))
+
+#(define (format-tempo engraver event)
+ (print-line engraver
+ "tempo"
+ ; get length of quarter notes, in seconds
+ (/ (ly:event-property event 'metronome-count)
+ (format-moment (ly:duration-length (ly:event-property
+ event
+ 'tempo-unit))))))
+
+
+#(define (format-breathe engraver event)
+ (print-line engraver
+ "breathe"))
+
+#(define (format-glissando engraver event)
+ (print-line engraver
+ "gliss"))
+
+#(define (format-tie engraver event)
+ (print-line engraver
+ "tie"))
+
+#(define (format-articulation engraver event)
+ (print-line engraver
+ "script"
+ (ly:event-property event 'articulation-type)))
+
+#(define (format-text engraver event)
+ (print-line engraver
+ "text"
+ (ly:event-property event 'text)))
+
+#(define (format-slur engraver event)
+ (print-line engraver
+ "slur"
+ (ly:event-property event 'span-direction)))
+
+#(define (format-dynamic engraver event)
+ (print-line engraver
+ "dynamic"
+ (ly:event-property event 'text)))
+
+#(define (format-cresc engraver event)
+ (print-line engraver
+ "cresc"
+ (ly:event-property event 'span-direction)))
+
+#(define (format-decresc engraver event)
+ (print-line engraver
+ "decresc"
+ (ly:event-property event 'span-direction)))
+
+#(define (format-textspan engraver event)
+ (let* ((context (ly:translator-context engraver))
+ (moment (ly:context-current-moment context))
+ (spanner-props (ly:context-property context 'TextSpanner))
+ (details (chain-assoc-get 'bound-details spanner-props))
+ (left-props (assoc-get 'left details '()))
+ (left-text (assoc-get 'text left-props '())))
+ (print-line engraver
+ "set_string"
+ (ly:event-property event 'span-direction)
+ left-text)))
+
+
+%%%% The actual engraver definition: We just install some listeners so we
+%%%% are notified about all notes and rests. We don't create any grobs or
+%%%% change any settings.
+
+\layout {
+ \context {
+ \Voice
+ \consists #(make-engraver
+ (listeners
+ (tempo-change-event . format-tempo)
+ (rest-event . format-rest)
+ (note-event . format-note)
+ (articulation-event . format-articulation)
+ (text-script-event . format-text)
+ (slur-event . format-slur)
+ (breathing-event . format-breathe)
+ (dynamic-event . format-dynamic)
+ (crescendo-event . format-cresc)
+ (decrescendo-event . format-decresc)
+ (text-span-event . format-textspan)
+ (glissando-event . format-glissando)
+ (tie-event . format-tie)))
+ }
+}
projects / lilypond.git / blobdiff