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ui.rkt
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#lang racket/gui
(require video/base
video/render
video/player
(prefix-in core: video/core)
images/icons/control)
(define screen-width 1920)
(define screen-height 1080)
(define default-cam-vid "/dev/video0")
(define default-cam-aud "CL1")
(define default-pres-vid "/dev/video3")
(define default-pres-aud "CL2")
(define default-mic "")
(define recordings-folder (build-path (find-system-path 'home-dir) "recordings"))
(make-directory* recordings-folder)
(define view-width 960)
(define view-height 540)
(define normal-font
(let ([n normal-control-font])
(make-object font%
(* 8 (send n get-size))
(send n get-face)
(send n get-family)
(send n get-style)
(send n get-weight)
(send n get-underlined)
(send n get-smoothing)
(send n get-size-in-pixels)
(send n get-hinting))))
(define large-font
(let ([n normal-control-font])
(make-object font%
(* 8 (send n get-size))
(send n get-face)
(send n get-family)
(send n get-style)
(send n get-weight)
(send n get-underlined)
(send n get-smoothing)
(send n get-size-in-pixels)
(send n get-hinting))))
(define marks-file (build-path recordings-folder "marks.txt"))
(define (camera-render-settings)
(make-render-settings #:destination (path->string (build-path recordings-folder
(format "camera-~a"
(current-seconds))))
#:format 'mp4
#:split-av #t
#:width 1920
#:height 1080))
(define (presenter-render-settings)
(make-render-settings #:destination (path->string (build-path recordings-folder
(format "presenter-~a"
(current-seconds))))
#:format 'mp4
#:split-av #t
#:width 1920
#:height 1080))
(define (mic-render-settings)
(make-render-settings #:destination (path->string (build-path recordings-folder
(format "mic-~a"
(current-seconds))))
#:format 'mp4
#:split-av #t
#:width 1920
#:height 1080))
(define record-label
(record-icon #:color "red"
#:height 200))
(define stop-label
(stop-icon #:color "gray"
#:height 200))
(define config-dirs%
(class dialog%
(super-new)
(init camera-vid camera-aud
presenter-vid presenter-aud
mic)
(define camera-vid-dev camera-vid)
(define camera-aud-dev camera-aud)
(define pres-vid-dev presenter-vid)
(define pres-aud-dev presenter-aud)
(define mic-dev mic)
(define/public (get-dev)
(values camera-vid-dev camera-aud-dev
pres-vid-dev pres-aud-dev
mic-dev))
(define camera-vid-field (new text-field% [parent this]
[label "Camera Video"]
[text camera-vid-dev]))
(define camera-aud-field (new text-field% [parent this]
[label "Camera Audio"]
[text camera-aud-dev]))
(define pres-vid-field (new text-field% [parent this]
[label "Presenter Video"]
[text pres-vid-dev]))
(define pres-aud-field (new text-field% [parent this]
[label "Presenter Audio"]
[text pres-aud-dev]))
(define mic-field (new text-field% [parent this]
[label "Mic"]
[text mic-dev]))
(define conf-row (new horizontal-pane% [parent this]))
(new button% [parent conf-row]
[label "OK"]
[callback
(λ (b e)
(set! camera-vid-dev (send camera-vid-field get-value))
(set! camera-aud-dev (send camera-aud-field get-value))
(set! pres-vid-dev (send pres-vid-field get-value))
(set! pres-aud-dev (send pres-aud-field get-value))
(set! mic-dev (send mic-field get-value))
(send this show #f))])
(new button% [parent conf-row]
[label "Cancel"]
[callback
(λ (b e)
(send this show #f))])))
(define vid-gui%
(class frame%
(super-new)
(define recording? #f)
(define recording-lock (make-semaphore 1))
(define camera-vid-dev default-cam-vid)
(define camera-aud-dev default-cam-aud)
(define pres-vid-dev default-pres-vid)
(define pres-aud-dev default-pres-aud)
(define mic-dev default-mic)
(define (stop-filming)
(send camera-vps stop)
(send presenter-vps stop))
(define menu-bar (new menu-bar% [parent this]))
(define config-menu (new menu% [parent menu-bar]
[label "Configure"]))
(new menu-item% [parent config-menu]
[label "Configure Inputs"]
[callback (λ (t e)
(define conf (new config-dirs% [parent this]
[label "Configure"]
[camera-vid camera-vid-dev]
[camera-aud camera-aud-dev]
[presenter-vid pres-vid-dev]
[presenter-aud pres-aud-dev]
[mic mic-dev]))
(send conf show #t)
(define-values (cv ca pv pa m) (send conf get-dev))
(set! camera-vid-dev cv)
(set! camera-aud-dev ca)
(set! pres-vid-dev pv)
(set! camera-aud-dev pa)
(set! mic-dev m))])
(new menu-item% [parent config-menu]
[label "Saved Files"]
[callback (λ (t e)
(system* (find-executable-path "xdg-open")
recordings-folder))])
(new menu-item% [parent config-menu]
[label "Remove Marks"]
[callback (λ (t e)
(delete-directory/files marks-file
#:must-exist #f))])
(new menu-item% [parent config-menu]
[label "Exit"]
[callback
(λ (t e)
(stop-filming)
(send this show #f))])
(new menu-item% [parent config-menu]
[label "Shut Down"]
[callback
(λ (t e)
(stop-filming)
(send this show #f)
(system* (find-executable-path "halt")))])
(define screen-row (new horizontal-pane% [parent this]))
(define camera-screen (new video-canvas% [parent screen-row]
[width view-width]
[height view-height]))
(define presenter-screen (new video-canvas% [parent screen-row]
[width view-width]
[height view-height]))
(define audio-row (new horizontal-pane% [parent this]))
(define camera-audio (new gauge% [parent audio-row]
[label ""]
[range 100]
[min-width view-width]
[stretchable-width #f]))
(define presenter-audio (new gauge% [parent audio-row]
[label ""]
[range 100]
[min-width view-width]
[stretchable-width #f]))
(define time-row (new horizontal-pane% [parent this]))
(define time (new message% [parent time-row]
[label "0:0:0"]
[font large-font]))
(define control-row (new horizontal-pane% [parent this]))
(define mark-button (new button% [parent control-row]
[label "MARK"]
[font normal-font]
[callback
(λ (b e)
(with-output-to-file marks-file
#:exists 'append
(λ ()
(displayln (current-seconds)))))]))
(define rec-button (new button% [parent control-row]
[label record-label]
[font normal-font]
[callback
(λ (b e)
(call-with-semaphore/enable-break
recording-lock
(λ ()
(set! recording? (not recording?))
(stop-vps)
(cond [recording?
(send b set-label stop-label)
(send recording-timer start (* 1000 60 5) #f)
(send camera-vps record (camera-render-settings))
(send presenter-vps record (presenter-render-settings))
(send mic-vps record (mic-render-settings))]
[else
(send b set-label record-label)
(send recording-timer stop)
(send camera-vps record #f)
(send presenter-vps record #f)
(send mic-vps record #f)])
(play-vps))))]))
;; Video player servers:
(define camera-vps (new video-player-server%
[video (blank)]
[canvas camera-screen]))
(define presenter-vps (new video-player-server%
[video (blank)]
[canvas presenter-screen]))
(define mic-vps (new video-player-server%
[video (color "black")]))
(send mic-vps render-video #f)
(play-vps)
(define/public (stop-vps)
(send camera-vps stop)
(send presenter-vps stop)
(send mic-vps stop))
(define/public (play-vps)
(send camera-vps set-video
(if (file-exists? camera-vid-dev)
(core:make-input-device #:video camera-vid-dev
#:audio camera-aud-dev)
(color "blue")))
(send camera-vps play)
(send presenter-vps set-video
(if (file-exists? pres-vid-dev)
(core:make-input-device #:video pres-vid-dev
#:audio pres-aud-dev)
(color "blue")))
(send presenter-vps play)
(send mic-vps set-video
(if (file-exists? mic-dev)
(core:make-input-device #:video mic-dev
#:audio mic-dev)
(color "blue")))
(send mic-vps play))
(define recording-timer
(new timer% [notify-callback
(λ ()
(call-with-semaphore/enable-break
recording-lock
(λ ()
(stop-vps)
(send camera-vps record (camera-render-settings))
(send presenter-vps record (presenter-render-settings))
(send mic-vps record (mic-render-settings))
(play-vps))))]))))
(module+ main
(define window (new vid-gui%
[label "VidOS"]))
(send window fullscreen #t)
(send window show #t))