opening gstreamer window from cl

flake.nix

@@ -36,6 +36,7 @@
                 pkgs.gst_all_1.gstreamer
                 pkgs.gst_all_1.gst-plugins-base
                 pkgs.gst_all_1.gst-plugins-good
+                pkgs.pipewire
                 sbcl'
               ];
             };

gstreamer/tutorial-hello-world.lisp

@@ -35,6 +35,10 @@
 	 (gir:invoke (pipeline 'set-state)
 					 (gir:nget *gstreamer* "State" :playing))))
 
+;; from here?
+;; https://github.com/irsbugs/GStreaming?tab=readme-ov-file#gstparse_launch
+;; and docs searched with underscore
+;; https://gstreamer.freedesktop.org/documentation/gstreamer/gstparse.html?gi-language=python#gst_parse_launch
 (defun tutorial-main ()
   (gir:invoke (*gstreamer* 'init) '())
   (let ((pipeline (gir:invoke (*gstreamer* 'parse-launch)
@@ -57,3 +61,29 @@
 ;; videotestsc worked
 ;; and error i got was from trying to set :null ? but it should be correct enum
 ;; oh well, ok
+(defun for-screencast ()
+  (gir:invoke (*gstreamer* 'init) '())
+  (let ((pipeline (gir:invoke (*gstreamer* 'parse-launch)
+										"pipewiresrc path=46 ! videoconvert ! autovideosink"
+										;"playbin uri=https://gstreamer.freedesktop.org/data/media/sintel_trailer-480p.webm"
+										)))
+	 (gir:invoke (pipeline 'set-state)
+					 (gir:nget *gstreamer* "State" :playing))
+	 ;; (let* ((bus (gir:invoke (pipeline 'get-bus)))
+	 ;; 		  (msg (gir:invoke (bus 'timed-pop-filtered)
+	 ;; 								 (gir:nget *gstreamer* :clock-time-none)
+	 ;; 								 (list
+	 ;; 								  (gir:nget *gstreamer* "MessageType" :error)
+	 ;; 								  (gir:nget *gstreamer* "MessageType" :eos))))))
+	 ;; (gir:invoke (pipeline 'set-state)
+	 ;; 				 (gir:nget *gstreamer* "State" :paused))
+	 ))
+
+;; well, pipewire is not part of what's added to env
+;; not sure if i can add it
+;; trying to run without env gstreamer doesn't work, installing
+;; $ sudo apt install libgstreamer1.0-dev libgstreamer-plugins-base1.0-dev libgstreamer-plugins-good1.0-dev
+;; still results in error for (defvar *gstreamer* (gir:require-namespace "Gst"))
+;; i can try to add pipewire, but then would it work with the screen share running on system server?
+;; it did work. wowy. ok
+;; cool. now i'm kind of at the point of python example :D

gtk-maybe-video.lisp

@@ -1,4 +1,5 @@
 (load (sb-ext:posix-getenv "ASDF"))
+
 (asdf:load-system 'cl-cffi-gtk)
 
 (defpackage :video-processor

maybe-screencast.lisp

@@ -1,7 +1,10 @@
 (load (sb-ext:posix-getenv "ASDF"))
 (asdf:load-system 'dbus)
 
-(defpackage #:screencasting (:use #:cl))
+(defpackage
+	 #:screencasting
+  (:use #:cl)
+  (:export call-with-all-predefined))
 (in-package #:screencasting)
 
 ;; https://flatpak.github.io/xdg-desktop-portal/docs/doc-org.freedesktop.portal.ScreenCast.html

notes.org

@@ -182,3 +182,31 @@ https://search.nixos.org/packages?channel=unstable&from=0&size=50&sort=relevance
 
 
 they are packaged in nix, this is just unbelievable how much is done by humanity, omg
+
+* [2024-08-15 Thu]
+
+** getting back after a long while.
+so, i was at the creating a window, not knowing how to stream video from pipewire out node
+so. what to do, huh
+i think gtk3 bindings library was separate from gobject and glib
+
+but maybe it doesn't matter?
+or maybe i should figure out glib bindings and use gtk3 though it?
+
+** well, there's something simple with opening a window
+[[file:gtk-playground.lisp::defun example-window-simple (]]
+
+** and something extra simple with gstreamer opening separate window for test video source
+[[file:gstreamer/tutorial-hello-world.lisp]]
+
+** maybe try to open gstreamer window with screen share?
+
+ok, when i try example of pipewire window on screenshare source
+i get error that pipewiresrc is not found
+and that's right, i used system-wide gst-launch-1.0
+and when i tried with one in flake shell - it also didn't work
+
+so. tried removing all from shell env, then not found namespace Gst
+(defvar *gstreamer* (gir:require-namespace "Gst"))
+
+so. yeah. maybe i need to install dev headers or something?