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;nyquist plug-in
;version 4
;type analyze
;name "Regular Interval Labels..."
;manpage "Regular_Interval_Labels"
;action "Adding equally-spaced labels to the label track..."
;author "Steve Daulton"
;copyright "Released under terms of the GNU General Public License version 2"
;; Released under terms of the GNU General Public License version 2:
;; http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
;;
;; Original version by David R. Sky (http://www.garyallendj.com/davidsky/) 2007.
;; Based on an idea by Sami Jumppanen, with contributions from
;; Alex S.Brown, Dominic Mazzoni, Pierre M.I., Gale Andrews, Steve Daulton.
;; This version by Steve Daulton (http://easyspacepro.com) 2016
;control mode "Use 'Number of labels' OR 'Label interval'" choice "Number of labels,Label interval" 0
;control totalnum "Number of labels" int-text "" 10 1 1000
;control interval "Label interval (seconds)" float-text "" 60 0.001 3600
;control adjust "Adjust label interval to fit length" choice "No,Yes" 0
;control labeltext "Label text" string "" "Label" ""
;control zeros "Minimum number of digits in label" choice "None - text only,1 (before label),2 (before label),3 (before label),1 (after label),2 (after label),3 (after label)" 2
;control firstnum "Begin numbering from" int-text "" 1 0 nil
(defun make-labels ()
"Generate labels at regular intervals"
(setf labels ())
;; Get parameters
(case mode
(0 ;Number of Labels
(setf interval (/ (get-duration 1) totalnum)))
(1 (setf totalnum (get-interval-count))
(when (= adjust 1)
(setf interval (/ (get-duration 1) totalnum)))
(check-number-of-labels)))
;; Loop for required number of labels
(do* ((count 0 (1+ count))
(time 0 (* count interval)))
((= count totalnum) labels)
(push (make-one-label time (+ firstnum count)) labels)))
(defun check-number-of-labels ()
"Throw error if excessive number of labels ('Interval' mode only)"
(when (> totalnum 1000)
(throw 'err
(format nil "Too many labels.~%~%~
Selection length is ~a seconds and~%~
Label interval is ~a seconds~%~
giving a total of ~a labels.~%~
Maximum number of labels from this effect is 1000.~%~
Please use a shorter selection, or a longer Label interval."
(formatgg (get-duration 1))
(formatgg interval)
(if (= adjust 1)
(round (/ (get-duration 1) interval))
(1+ (round (/ (get-duration 1) interval))))))))
(defun get-interval-count ()
"Number of labels when interval is specified"
(case adjust
;; Interval is user input value
(0 (let ((n (truncate (/ (get-duration 1) interval))))
(if (< (* n interval)(get-duration 1))
(1+ n)
n)))
;; Adjust interval to fit length
(1 (let* ((min-num (truncate (/ (get-duration 1) interval)))
(max-num (1+ min-num)))
(if (and (> min-num 0)
(< (abs (- interval (/ (get-duration 1) min-num)))
(abs (- interval (/ (get-duration 1) max-num)))))
min-num
max-num)))))
(defun make-one-label (time num)
"Make a single label"
(let* ((num-text (format nil "~a" num))
(non-zero-digits (length num-text)))
(if (= zeros 0)
(setf num-text "")
(dotimes (i (max 0 (- zeros non-zero-digits)))
(setf num-text (format nil "~a~a" "0" num-text))))
(if num-before-text
(setf text (format nil "~a~a" num-text labeltext))
(setf text (format nil "~a~a" labeltext num-text)))
(list time text)))
(defun lasttrackp ()
"true when processing the final selected track"
(let ((index (get '*track* 'index))
(num (length (get '*selection* 'tracks))))
(= index num)))
(defun formatgg (num)
"Similar to float-format %g but more decimal places"
(cond
((/= num (truncate num)) ; not integer
(setf *float-format* "%.5f")
(let ((numtxt (format nil "~a" num)))
(do* ((i (1- (length numtxt)) (1- i))
(ch (char numtxt i)(char numtxt i)))
((char/= ch #\0))
(setf numtxt (subseq numtxt 0 i)))
(setf *float-format* "%g")
numtxt))
(t num)))
(setf num-before-text (<= zeros 3))
(setf zeros (1+ (rem (1- zeros) 3)))
;; Analyze plug-ins may return text message per track but
;; we only want error messages once, and only one set of labels.
(if (lasttrackp)
(catch 'err (make-labels))
nil)
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