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(when (and (provided? 'xm)
(not (provided? 'snd-effects-utils.scm)))
(load "effects-utils.scm"))
(define *e* *motif*)
(define update-label (*e* 'update-label))
(define change-label (*e* 'change-label))
(define make-effect-dialog (*e* 'make-effect-dialog))
(define add-sliders (*e* 'add-sliders))
(define activate-dialog (*e* 'activate-dialog))
(define select-file (*e* 'select-file))
(require snd-examp.scm)
(provide 'snd-fft-menu.scm)
(define fft-list ()) ; menu labels are updated to show current default settings
(define fft-menu (add-to-main-menu "FFT Edits"
(lambda ()
(for-each (lambda (fft) (fft)) fft-list))))
;;; ------ FFT edit
;;;
(define fft-edit-low-frequency 100)
(define fft-edit-high-frequency 1000)
(define fft-edit-label "FFT notch filter")
(define fft-edit-dialog #f)
(define fft-edit-menu-label #f)
(define (cp-fft-edit)
(fft-edit fft-edit-low-frequency fft-edit-high-frequency))
(if (not (or (provided? 'xg)
(provided? 'xm)))
(set! fft-edit-menu-label (add-to-menu fft-menu fft-edit-label cp-fft-edit))
(begin
(define (post-fft-edit-dialog)
(unless fft-edit-dialog
;; if fft-edit-dialog doesn't exist, create it
(let ((initial-fft-edit-low-frequency 100)
(initial-fft-edit-high-frequency 1000)
(sliders ()))
(set! fft-edit-dialog
(make-effect-dialog fft-edit-label
(values (lambda (w context info)
(cp-fft-edit))
(lambda (w context info)
(help-dialog "FFT notch filter"
"A simple example of FFT-based editing. It takes an FFT of the entire sound,\
removes all energy below the low frequency and above the high frequency, then computes the inverse FFT."))
(lambda (w c i)
(set! fft-edit-low-frequency initial-fft-edit-low-frequency)
(set! fft-edit-high-frequency
initial-fft-edit-high-frequency)
((*motif* 'XtSetValues) (car sliders) (list (*motif* 'XmNvalue) (floor fft-edit-low-frequency)))
((*motif* 'XtSetValues) (cadr sliders) (list (*motif* 'XmNvalue) (floor fft-edit-high-frequency)))))))
(set! sliders
(add-sliders
fft-edit-dialog
(list (let ((low-func (lambda (w context info) (set! fft-edit-low-frequency ((*motif* '.value) info)))))
(list "low frequency" 20 initial-fft-edit-low-frequency 22050 low-func 1))
(let ((high-func (lambda (w context info) (set! fft-edit-high-frequency ((*motif* '.value) info)))))
(list "high frequency" 20 initial-fft-edit-high-frequency 22050 high-func 1)))))))
(activate-dialog fft-edit-dialog))
(set! fft-edit-menu-label (add-to-menu fft-menu "FFT notch filter" post-fft-edit-dialog))))
(set! fft-list (cons (lambda ()
(let ((new-label (format #f "FFT notch filter (~D ~D)" fft-edit-low-frequency fft-edit-high-frequency)))
(if fft-edit-menu-label (change-label fft-edit-menu-label new-label))
(set! fft-edit-label new-label)))
fft-list))
;;; ------ FFT squelch
;;;
(define fft-squelch-amount 0.0)
(define fft-squelch-label "FFT squelch")
(define fft-squelch-dialog #f)
(define fft-squelch-menu-label #f)
(define (cp-fft-squelch)
(fft-squelch fft-squelch-amount))
(if (not (or (provided? 'xg)
(provided? 'xm)))
(set! fft-squelch-menu-label (add-to-menu fft-menu fft-squelch-label cp-fft-squelch))
(begin
(define (post-fft-squelch-dialog)
(unless fft-squelch-dialog
;; if fft-squelch-dialog doesn't exist, create it
(let ((initial-fft-squelch-amount 0.0)
(sliders ()))
(set! fft-squelch-dialog
(make-effect-dialog fft-squelch-label
(values (lambda (w context info)
(cp-fft-squelch))
(lambda (w context info)
(help-dialog "FFT squelch"
"Removes all energy below the squelch amount. This is sometimes useful for noise-reduction."))
(lambda (w c i)
(set! fft-squelch-amount initial-fft-squelch-amount)
((*motif* 'XtSetValues) (list-ref sliders 0)
(list (*motif* 'XmNvalue) (round (* fft-squelch-amount 100))))))))
(set! sliders
(add-sliders
fft-squelch-dialog
(let ((squelch-func (lambda (w context info)
(set! fft-squelch-amount (/ ((*motif* '.value) info) 100)))))
(list (list "squelch amount" 0.0 initial-fft-squelch-amount 1.0 squelch-func 100)))))))
(activate-dialog fft-squelch-dialog))
(set! fft-squelch-menu-label (add-to-menu fft-menu "FFT squelch" post-fft-squelch-dialog))))
(set! fft-list (cons (lambda ()
(let ((new-label (format #f "FFT squelch (~1,2F)" fft-squelch-amount)))
(if fft-squelch-menu-label (change-label fft-squelch-menu-label new-label))
(set! fft-squelch-label new-label)))
fft-list))
(add-to-menu fft-menu #f #f)
(add-to-menu fft-menu "Squelch vowels" squelch-vowels)
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