some notes
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efim
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;(load (sb-ext:posix-getenv "ASDF"))
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(asdf:load-system 'dbus)
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(defpackage
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#:screencasting
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(:use #:cl)
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(:export call-with-all-predefined))
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(in-package #:screencasting)
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;; https://flatpak.github.io/xdg-desktop-portal/docs/doc-org.freedesktop.portal.ScreenCast.html
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(defconstant +screen-cast-interface+ "org.freedesktop.portal.ScreenCast")
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(defconstant +request-interface+ "org.freedesktop.portal.Request")
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;; some iolib tutorial https://pages.cs.wisc.edu/~psilord/blog/data/iolib-tutorial/tutorial.html
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;; i hoped it would help me understand the 'publish-events'
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;; i'm not sure how to do interactive calls,
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;; since maybe i need to "publish objects"
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;; and that means the callbacks are set in stone?
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;; i guess i could try to do a Notification call in the callback on screenshot request?
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(defun send-notification (bus message)
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(dbus:with-introspected-object (notification bus "/org/freedesktop/Notifications" "org.freedesktop.Notifications")
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(notification "org.freedesktop.Notifications" "Notify"
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"Test" 0 "" "Test" (or message "This is a test; I repeat, this is a test.") '() '() -1)))
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;; well, i suppose i would need to open multiple connections?
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;; let's do something like this https://github.com/Lautaro-Garcia/cl-notify/blob/main/src/dbus-protocol.lisp#L27
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;; (defmacro with-dbus-method-inovaction ((result-var method &rest args) &body body)
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;; (alexandria:with-gensyms (bus notifications-object)
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;; `(dbus:with-open-bus (,bus (dbus:session-server-addresses))
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;; (dbus:with-introspected-object (,notifications-object ,bus "/org/freedesktop/Notifications" "org.freedesktop.Notifications")
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;; (let ((,result-var (,notifications-object "org.freedesktop.Notifications" ,method ,@args)))
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;; ,@body)))))
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;; but. this supposes result-var being a resulting value
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;; and i'd want to what? pass in a callback to register?
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;; alright, let's have function startup new bus connection for each call
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;; but then try to do these multiple calls
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(defun call-screencast-method (method-name params)
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(handler-case
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(dbus:with-open-bus (bus (dbus:session-server-addresses))
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(let*
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((requester-name (cl-ppcre:regex-replace "\\." (dbus:bus-name bus) "_" :start 1))
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(request-name "yayay")
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(resp-path (concatenate 'string "/org/freedesktop/portal/desktop/request/"
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requester-name
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"/"
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request-name)))
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(dbus:define-dbus-object request-object
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(:path resp-path))
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(dbus:define-dbus-signal-handler (request-object response) ((id :uint32) (results (:ARRAY (:DICT-ENTRY :STRING :VARIANT))))
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(:interface +request-interface+)
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(format t "Got response ~S with results ~S~%" id results)
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(format t "before sending notification")
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(send-notification bus "yayaya from the first response")
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(format t "ending signal handler")
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(force-output))
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(format T "Will try to listen on ~A~%" resp-path)
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(format T "Bus connection name ~A~%" (dbus:bus-name bus))
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(dbus:add-match bus :type :signal
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:interface +request-interface+)
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(dbus:with-introspected-object (desktop bus "/org/freedesktop/portal/desktop" "org.freedesktop.portal.Desktop")
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(desktop +screen-cast-interface+ method-name ; "CreateSession"
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params
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;; '(("handle_token" ((:string) "yayay"))
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;; ("session_handle_token" ((:string) "hohoyyy")))
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))
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(dbus:publish-objects bus '(request-object) )))
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(end-of-file ()
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:disconnected-by-bus)))
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'(call-screencast-method "CreateSession"
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'(("handle_token" ((:string) "yayay"))
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("session_handle_token" ((:string) "hohoyyy"))))
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;; let's define ALL beforehand?
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(defun call-with-all-predefined ()
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(handler-case
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(dbus:with-open-bus (bus (dbus:session-server-addresses))
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(let*
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((requester-name (cl-ppcre:regex-replace "\\." (dbus:bus-name bus) "_" :start 1))
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(request-create-session-name "createSessionReq")
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(resp-path (concatenate 'string "/org/freedesktop/portal/desktop/request/"
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requester-name
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"/"
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request-create-session-name))
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(request-select-sources "selectSourcesReq")
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(select-sources-resp-path (concatenate 'string "/org/freedesktop/portal/desktop/request/"
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requester-name
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"/"
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request-select-sources))
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(request-start "startReq")
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(start-resp-path (concatenate 'string "/org/freedesktop/portal/desktop/request/"
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requester-name
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"/"
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request-start))
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(session-handle-hardcoded "yayay")
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(session-handle-path (concatenate 'string "/org/freedesktop/portal/desktop/session/"
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requester-name
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"/"
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session-handle-hardcoded)))
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(dbus:define-dbus-object request-object
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(:path resp-path))
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(dbus:define-dbus-signal-handler (request-object response) ((id :uint32) (results (:ARRAY (:DICT-ENTRY :STRING :VARIANT))))
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(:interface +request-interface+)
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(format t "Got response ~S with results ~S~%" id results)
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(send-notification bus "yayaya from the first response")
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(format t "About sto send SelectSources with path ~S~%" session-handle-path)
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(force-output)
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(dbus:with-introspected-object (desktop bus "/org/freedesktop/portal/desktop" "org.freedesktop.portal.Desktop")
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(desktop +screen-cast-interface+ "SelectSources"
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session-handle-path ; hardcoded session-handle
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`(("handle_token" ((:string) ,request-select-sources)))))
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(format t "Still first callback, after calling SelectSources~%")
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(force-output))
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(dbus:define-dbus-object select-sources-request-obj
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(:path select-sources-resp-path))
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(dbus:define-dbus-signal-handler (select-sources-request-obj response) ((id :uint32) (results (:ARRAY (:DICT-ENTRY :STRING :VARIANT))))
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(:interface +request-interface+)
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(format t ">> Got inside of SelectSources callback ~A ~A~%" id results)
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(dbus:with-introspected-object (desktop bus "/org/freedesktop/portal/desktop" "org.freedesktop.portal.Desktop")
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(desktop +screen-cast-interface+ "Start"
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session-handle-path
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"parent-window"
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`(("handle_token" ((:string) , request-start)))))
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(format t ">> Still inside SelectSources callback, after calling Start~%")
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(force-output))
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(dbus:define-dbus-object start-request-obj
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(:path start-resp-path))
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(dbus:define-dbus-signal-handler (start-request-obj response) ((id :uint32) (results (:ARRAY (:DICT-ENTRY :STRING :VARIANT))))
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(:interface +request-interface+)
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(format t ">> Got inside of Start callback ~A ~A~%" id results))
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(format T "Will try to listen on ~A~%" resp-path)
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(format T "Bus connection name ~A~%" (dbus:bus-name bus))
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(dbus:add-match bus :type :signal
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:interface +request-interface+)
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(dbus:with-introspected-object (desktop bus "/org/freedesktop/portal/desktop" "org.freedesktop.portal.Desktop")
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(desktop +screen-cast-interface+ "CreateSession"
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`(("handle_token" ((:string) ,request-create-session-name))
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("session_handle_token" ((:string) ,session-handle-hardcoded)))))
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(dbus:publish-objects bus)))
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(end-of-file ()
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:disconnected-by-bus)))
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;; ok
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;; >> Got inside of Start callback 0 ((streams
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;; ((43
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;; ((position (0 0)) (size (1920 1080)))))))
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;; interesting. now what do do with the streams?
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;; An array of PipeWire streams. Each stream consists of a PipeWire node ID (the first element in the tuple, and a Vardict of properties.
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;; ok, now i need to figure out how
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;; yeah, nix shell nixpkgs#qpwgraph
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;; with this tool i see new 'out' node, maybe i can even already connect to it with
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;; some program?
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;; yes. enefedov@LLF33A87M:~/Documents/personal/learning-screen-share$ gst-launch-1.0 pipewiresrc path=43 ! videoconvert ! autovideosink
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;; cool.
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;; now i want to have a window with this video stream created by my program
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;; this is new level of "i have no idea where to go"
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;; https://github.com/death/dbus/issues/31
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;; asked my question about multiple async dbus requests
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46
notes.org
46
notes.org
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@ -534,6 +534,9 @@ Backtrace:
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#+end_src
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the source:
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( in the git : https://git.sunshine.industries/efim/scratch-screen-share/src/commit/73316581a056a20e51dc36eb96673acfee7d90b0/gstreamer/capturing-frames.lisp )
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#+begin_src lisp
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;(load (sb-ext:posix-getenv "ASDF"))
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(asdf:load-system 'cl-cffi-gtk)
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@ -632,3 +635,46 @@ the source:
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;(try-run)
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#+end_src
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*** submitted
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https://github.com/andy128k/cl-gobject-introspection/issues/102
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** what's next?
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i could try another library for gir bindings.
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not sure whether that would help much, but yeah
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or i could just try to replicate this in python
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or maybe in go?
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** whelp gir2cl is also on top of cl-gobject-introspection
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huh.
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let's set up a directory with go stuff? i guess
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trying in separate directory
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with https://github.com/linuxdeepin/go-gir
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but more realistically
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https://pkg.go.dev/github.com/go-gst/go-gst
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this is very much different, but yeah.
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let's go with appsink example
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https://pkg.go.dev/github.com/go-gst/go-gst@v1.1.0/examples/appsink
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for the go library to pick up gstreamer from nix shell
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https://discourse.nixos.org/t/flakes-how-to-make-pkg-config-work-with-nix-shell/16305
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it has to somehow be exposed via pkg-config
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yes, adding pkg-config to shell works, nice
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* [2024-08-24 Sat]
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** ok, continuing with go thing. into what do i want to decode stuff?
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well, the reported default format is
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sample info: video/x-raw, width=(int)320, height=(int)240, framerate=(fraction)30/1, multiview-mode=(string)mono, format=(string)YV12, pixel-aspect-ratio=(fraction)1/1, interlace-mode=(string)progressive
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http://www.avisynth.nl/index.php/FAQ_YV12
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but maybe i want something else?
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let's read docs on appsrc
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https://github.com/go-gst/go-gst/tree/v1.1.0/examples/appsrc
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