more notes and some opengl light in the tunnel
This commit is contained in:
efim
parent
a7c31193bc
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@ -1,174 +0,0 @@
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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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@ -145,6 +145,7 @@
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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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(format T "About to send first message to dbus : Create Seccion~%")
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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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@ -20,11 +20,11 @@
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},
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"nixpkgs": {
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"locked": {
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"lastModified": 1719597372,
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"narHash": "sha256-SpZKwy6sjgH00xiYmfjVAX+JaNkPQ2Q/BrEhNtWJvH4=",
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"lastModified": 1734802620,
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"narHash": "sha256-rUg5S3bKZu1rNPY5/EqQNXN9DNpXIZXc/AnbcK/h/sU=",
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"owner": "nixos",
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"repo": "nixpkgs",
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"rev": "dd66e39ec4c7252fab7e6f8fd57b5ab2a3c7d63c",
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"rev": "8ddbc4432614ed034cb69f02eedd723250d9513e",
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"type": "github"
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},
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"original": {
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22
flake.nix
22
flake.nix
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@ -4,8 +4,7 @@
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inputs.flake-utils.url = "github:numtide/flake-utils";
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outputs = { self, nixpkgs, flake-utils }:
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flake-utils.lib.eachDefaultSystem
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(system:
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flake-utils.lib.eachDefaultSystem (system:
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let
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pkgs = nixpkgs.legacyPackages.${system};
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# https://nixos.org/manual/nixpkgs/stable/#lisp-overriding-package-attributes
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@ -19,28 +18,23 @@
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hash = "sha256-xbg3tPYfRNGJo+9F/58w2bDeZqV33Z871+ClSg4ACPk=";
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};
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});
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sbcl' = pkgs.sbcl.withPackages (ps: [ ps.alexandria
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sbcl' = pkgs.sbcl.withPackages (ps: [
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ps.alexandria
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dbus'
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ps.cl-cffi-gtk
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ps.sdl2
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ps.cl-opengl
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ps.cl-gobject-introspection
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]);
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in
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{
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# Create a wrapper that uses system's Wayland
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in {
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devShells.default = pkgs.mkShell {
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SDL_VIDEODRIVER="wayland";
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WAYLAND_DISPLAY="wayland-1";
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EGL_PLATFORM="wayland";
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buildInputs = [
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pkgs.gst_all_1.gstreamer
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pkgs.gst_all_1.gst-plugins-base
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pkgs.gst_all_1.gst-plugins-good
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pkgs.pipewire
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sbcl'
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pkgs.nixfmt
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];
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};
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}
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);
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});
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# see https://serokell.io/blog/practical-nix-flakes
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}
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118
notes.org
118
notes.org
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@ -677,4 +677,122 @@ 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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* [2024-12-08 Sun]
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** well, i guess i will maybe return to this?
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https://www.youtube.com/watch?v=Jn_09BeUEI0
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here is gltransformation
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this looks like what i'd really want, no?
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** and this is documentation
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https://gstreamer.freedesktop.org/documentation/opengl/index.html?gi-language=c
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https://gstreamer.freedesktop.org/documentation/opengl/gltransformation.html?gi-language=c#gltransformation
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why doesn't it work?
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* [2024-12-21 Sat]
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** wait. it works now? how and why
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maybe because it's installed via apt?
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yes. if i try to use
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gst-launch-1.0 gltestsrc ! gltransformation scale-y=0.5 scale-x=0.5 ! glimagesink
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in the nix shell i get
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#+begin_src
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Setting pipeline to PAUSED ...
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Caught SIGSEGV
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Spinning. Please run 'gdb gst-launch-1.0 242683' to continue debugging, Ctrl-C to quit, or Ctrl-\ to dump core.
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#+end_src
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** for now found article about other ways to transform
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https://lubosz.wordpress.com/2014/06/16/transforming-video-on-the-gpu/
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but that this opengl way is much faster
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comparing with this:
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https://gstreamer.freedesktop.org/documentation/videoconvertscale/videoscale.html?gi-language=c
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gst-launch-1.0 -v videotestsrc ! videoscale ! autovideosink
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gst-launch-1.0 -v videotestsrc ! videoscale ! video/x-raw,width=1000 ! autovideosink
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** the ordinary error is
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gst-launch-1.0 gltestsrc ! gltransformation rotation-z=45 ! glimagesink
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Setting pipeline to PAUSED ...
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Caught SIGSEGV
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Spinning. Please run 'gdb gst-launch-1.0 7843' to continue debugging, Ctrl-C to quit, or Ctrl-\ to dump core.
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** huh. trying previous nixpkgs releases
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and in 23.05 the error is different
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efim-nefedov@LLF33A87M:~/Documents/personal/scratch-screen-share$ gst-launch-1.0 gltestsrc ! gltransformation rotation-z=45 ! glimagesink
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Setting pipeline to PAUSED ...
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ERROR: from element /GstPipeline:pipeline0/GstGLImageSinkBin:glimagesinkbin0/GstGLImageSink:sink: Could not find any FBConfig's to use (check attributes?)
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Additional debug info:
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../ext/gl/gstglimagesink.c(1131): _ensure_gl_setup (): /GstPipeline:pipeline0/GstGLImageSinkBin:glimagesinkbin0/GstGLImageSink:sink
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ERROR: pipeline doesn't want to preroll.
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Failed to set pipeline to PAUSED.
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Setting pipeline to NULL ...
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Freeing pipeline ...
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** ok, looking at the error the problem is in creating connection
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WARN gldisplayegl gstgldisplay_egl.c:408:gst_gl_display_egl_from_gl_display:<gldisplayegl1> failed to get EGLDisplay from native display
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but beats me if i know what needs to be done
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claude.ai recommends adding LD_LIBRARY_PATH to gstreamer
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so trying
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#+begin_src nix
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gstWrapper = pkgs.writeScriptBin "gst-launch-wrapped" ''
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#!${pkgs.bash}/bin/bash
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export LD_LIBRARY_PATH=/usr/lib/x86_64-linux-gnu:$LD_LIBRARY_PATH
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exec ${pkgs.gst_all_1.gstreamer}/bin/gst-launch-1.0 "$@"
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'';
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#+end_src
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but that fails
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$ gst-launch-wrapped gltestsrc ! gltransformation rotation-z=45 ! glimagesink
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/nix/store/p6k7xp1lsfmbdd731mlglrdj2d66mr82-bash-5.2p37/bin/bash: error while loading shared libraries: __vdso_gettimeofday: invalid mode for dlopen(): Invalid argument
|
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|
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* [2024-12-22 Sun]
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|
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** ok, let's try what
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let's try default video out after i turn on the screen sharing from cl part
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with code cleaned up i can start the share, that's nice
|
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|
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gst-launch-1.0 pipewiresrc path=90 ! videoconvert ! autovideosink
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|
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let's also try to add opengl processing
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gst-launch-1.0 pipewiresrc path=90 ! videoconvert ! gltransformation rotation-z=45 ! glimagesink
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|
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so, this kind of works
|
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gst-launch-1.0 pipewiresrc path=90 ! videoconvert ! capsfilter caps="video/x-raw,format=RGBA" ! glupload ! gltransformation rotation-z=45 ! glimagesink
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even if the thing is small
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||||
|
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** trying to figure out why gl things open a small window
|
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*** one that works
|
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GST_DEBUG=4,caps:5 gst-launch-1.0 pipewiresrc path=90 ! videoconvert ! autovideosink
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has
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deterministic way of creating a stream-id
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0:00:00.032812186 44186 0x74b020000b70 INFO GST_EVENT gstevent.c:918:gst_event_new_caps: creating caps event video/x-raw, format=(string)BGRA, width=(int)1920, height=(int)1080, framerate=(fraction)0/1, max-framerate=(fraction)60/1
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0:00:00.033493070 44186 0x74b020000b70 INFO GST_EVENT gstevent.c:918:gst_event_new_caps: creating caps event video/x-raw, width=(int)1920, height=(int)1080, framerate=(fraction)0/1, max-framerate=(fraction)60/1, format=(string)YV12
|
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|
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*** and comparing with
|
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GST_DEBUG=4,caps:5 gst-launch-1.0 pipewiresrc path=90 ! videoconvert ! capsfilter caps="video/x-raw,format=RGBA" ! glupload ! gltransformation rotation-z=45 ! glimagesink
|
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(by recommendation of claude)
|
||||
0:00:00.152714238 44533 0x784a70000b70 INFO GST_EVENT gstevent.c:918:gst_event_new_caps: creating caps event video/x-raw(memory:GLMemory), width=(int)1920, height=(int)1080, framerate=(fraction)0/1, max-framerate=(fraction)60/1, format=(string)RGBA, texture-target=(string)2D
|
||||
0:00:00.152789062 44533 0x784a70000b70 INFO basetransform gstbasetransform.c:1326:gst_base_transform_setcaps:<glcolorbalance0> reuse caps
|
||||
0:00:00.152821256 44533 0x784a70000b70 INFO GST_EVENT gstevent.c:918:gst_event_new_caps: creating caps event video/x-raw(memory:GLMemory), width=(int)1920, height=(int)1080, framerate=(fraction)0/1, max-framerate=(fraction)60/1, format=(string)RGBA, texture-target=(string)2D
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||||
|
||||
well, i guess i can just open the window full size
|
||||
|
||||
*** ok! looks like it does stream full resolution.
|
||||
now. i'd want to open the displaying pipeline programmatically
|
||||
and then maybe try to dynamically change params
|
||||
|
||||
i guess even without a window embedding, just starting a window is good enough
|
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but also, hm.
|
||||
|
||||
do i need any ui for the video window? i really don't think so.
|
||||
maybe let's figure out the missing cursor
|
||||
gst-launch-1.0 pipewiresrc path=90 ! videoconvert ! capsfilter caps="video/x-raw,format=RGBA" ! glupload ! gltransformation rotation-x=-15 ortho=True ! glimagesink
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||||
gst-launch-1.0 gltestsrc ! gltransformation rotation-x=-45 ortho=True ! glimagesink
|
||||
|
||||
|
||||
** am i not getting into Create Session? after the Start?
|
||||
https://flatpak.github.io/xdg-desktop-portal/docs/doc-org.freedesktop.portal.ScreenCast.html
|
||||
(also note that here are cursor options)
|
||||
|
||||
** ok, let's try writing this in java then
|
||||
|
|
|
|||
Loading…
Reference in New Issue