Hi Paul,
thanks for the file. It lookes quite promising, but a quick test shows
some strange numbers I do not understand:
test.ly ---
\version "2.19.47"
\include "grob-meta-data-engraver.ily"
\score {
\new Staff {
\tempo 4 = 60
\repeat unfold 60 c'4
}
\layout { }
\midi { }
}
Processing this file yields to:
GNU LilyPond 2.19.48
»test.ly« wird verarbeitet
Analysieren...
Interpretation der Musik...[8][16][16]3.75
Vorverarbeitung der grafischen Elemente...
Interpretation der Musik...
MIDI-Ausgabe nach »test.midi«...
Ideale Seitenanzahl wird gefunden...
Musik wird auf eine Seite angepasst...
Systeme erstellen...
Layout nach »/tmp/lilypond-pgKSZe« ausgeben...
Konvertierung nach »test.pdf«...
Löschen von »/tmp/lilypond-pgKSZe«...
Kompilation erfolgreich beendet
marc@olivia ~/engraver$ timidity test.midi
Playing test.midi
MIDI file: test.midi
Format: 1 Tracks: 2 Divisions: 384
Sequence:
Text: creator:
Text: GNU LilyPond 2.19.48
Playing time: ~64 seconds
Notes cut: 0
Notes lost totally: 0
It shows a duration of 3.75 in line 4.
A timidity call plays the file in about 64 seconds
(even strange, 60 notes with tempo 4 = 60 should have a total duration
of 60 seconds).
What does 3.75 mean?
Marc
Am 08.09.2016 um 05:39 schrieb Paul:
On 09/05/2016 05:01 AM, Marc Hohl wrote:
Has someone else already done something like this? I have no experience
in writing scheme engravers, so any hint would be highly appreciated.
lilypond-html-live-score does something like this by post-processing an
SVG with python to add meta data to the grobs in the SVG file:
https://gitlab.com/sigmate/lilypond-html-live-score/blob/master/make-live-score#L88
I was working on porting part of that to scheme so it could be done
directly. I've attached my include file. It will currently display the
total duration to the log. It could be simplified in various ways if it
was calculating just the total duration and not adding timing info to
every grob.
It's still a work in progress and only lightly tested.
-Paul
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