ref: 6ae3a77f49a78ea78a4dca71a42ac2da5768fa3d
dir: /plugins/audacity/plug-ins/aubioonset.ny/
;nyquist plug-in
;version 1
;type analyze
;name "Onset Detection..."
;action "Generate onset label track using aubioonset..."
;info "Aubio onset detector:\n Generates a label track with markers at the beginning of audio events"
;control dmode "Detection Beats/Onsets" int "0=Beats 1=Onsets" 1 0 1
;control threshold "Detection threshold" real "[0.001-0.900...]" 0.3 0.001 1.0
;control omode "Mode" int "0=ComplexDomain 1=HFC 2=Specdiff 3=Phase 4=Energy" 0 0 3
;Create a function to make the sum the two channels if they are stereo
(defun mono-s (s-in)
(if (arrayp s-in) (snd-add (aref s-in 0) (aref s-in 1)) s-in)
)
; path to aubio commands
(cond
((= dmode 0)(setf aubiocmd "/home/piem/aubio/aubio/examples/aubiotrack"))
(t (setf aubiocmd "/home/piem/aubio/aubio/examples/aubioonset"))
)
(cond
((= omode 0)(setf onsetmode "complexdomain"))
((= omode 1)(setf onsetmode "hfc"))
((= omode 2)(setf onsetmode "specdiff"))
(t (setf onsetmode "dual"))
)
; largest number of samples
(setf largenumber 1000000000)
; some temporary files
;(setf infile (system "mktmp tmp-aubio-XXXXXX"))
;(setf tmfile (system "mktmp tmp-aubio-XXXXXX"))
(setf infile "/tmp/aubio-insecure.wav")
(setf tmfile "/tmp/aubio-insecure.txt")
; our command lines
(setf aubiocmd (strcat
aubiocmd
" -O " onsetmode
" -t " (ftoa threshold)
" -i " infile
" > " tmfile))
(setf deletcmd (strcat "rm -f " infile " " tmfile))
; save current sound selection into mono infile
(s-save (mono-s s) (snd-length (mono-s s) largenumber) infile)
; run aubio
(system aubiocmd)
; read the file and build the list of label in result
(let* (
(fp (open tmfile :direction :input))
(result '())
(n 1)
(c (read-line fp))
)
(read-line fp)
;(setf oldc c)
(while (not (not c))
(setq result
(append
result
;(list (list (strcat oldc " " c) ""))
(list (list (atof c) ""))
))
;(setf oldc c)
(setf c (read-line fp))
(setq n (+ n 1))
)
(close fp)
(system deletcmd)
;uncomment to debug
;(print result)
;If no silence markers were found, return a message
(if (null result)
(setq result "No onsets or beats found, no passages marked")
)
result
)