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;;; emacsconf-stream.el --- Play files and update streaming information -*- lexical-binding: t; -*-
;; Copyright (C) 2022 Sacha Chua
;; Author: Sacha Chua <sacha@sachachua.com>
;; Keywords: multimedia
;; This program is free software; you can redistribute it and/or modify
;; it under the terms of the GNU General Public License as published by
;; the Free Software Foundation, either version 3 of the License, or
;; (at your option) any later version.
;; This program is distributed in the hope that it will be useful,
;; but WITHOUT ANY WARRANTY; without even the implied warranty of
;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;; GNU General Public License for more details.
;; You should have received a copy of the GNU General Public License
;; along with this program. If not, see <https://www.gnu.org/licenses/>.
;;; Commentary:
;;
;;; Code:
(defvar emacsconf-stream-dir "/data/emacsconf/stream/"
"Directory where the stream versions are.
Files should be in YEAR/video-slug--main.webm and video-slug--main.vtt.")
(defvar emacsconf-stream-host "res.emacsconf.org")
(defun emacsconf-stream-track-login (track)
"Return user@host for the track."
(when (plist-get track :track)
(setq track (emacsconf-get-track (plist-get track :track))))
(concat emacsconf-id "-" (plist-get track :id) "@" emacsconf-stream-host))
(defvar emacsconf-stream-bottom-limit 80
"Number of characters for bottom text.")
(defun emacsconf-stream-write-news (track message)
(interactive (list (emacsconf-complete-track) (read-string "Message: ")))
(with-temp-file (expand-file-name "news.txt" (concat "/ssh:" (emacsconf-stream-track-login track) ":~"))
(insert message)))
(defun emacsconf-stream-broadcast (message)
(interactive (list (read-string "Message: ")))
(mapc (lambda (track) (emacsconf-stream-write-news track message)) emacsconf-tracks))
(defun emacsconf-stream-clear-talk-info (track)
(interactive (list (emacsconf-complete-track)))
(emacsconf-stream-set-talk-info-from-strings track "" ""))
(defun emacsconf-stream-clear-track (track)
(interactive (list (emacsconf-complete-track)))
(emacsconf-stream-set-talk-info-from-strings track "" "")
(emacsconf-stream-write-news track ""))
(defun emacsconf-stream-clear-all ()
(interactive)
(mapc #'emacsconf-stream-clear-track emacsconf-tracks))
(defun emacsconf-stream-set-talk-info-from-strings (track url bottom)
(interactive (list (emacsconf-complete-track) (read-string "URL: ") (read-string "Bottom: ")))
(let* ((home (concat "/ssh:" (emacsconf-stream-track-login track) ":~")))
(with-temp-file (expand-file-name "url.txt" home) (insert url))
(with-temp-file (expand-file-name "bottom.txt" home) (insert bottom))))
(defun emacsconf-stream-set-talk-info (talk)
(interactive (list (emacsconf-complete-talk-info)))
(emacsconf-stream-set-talk-info-from-strings
(emacsconf-get-track talk)
(concat (replace-regexp-in-string "^.*//" "" emacsconf-base-url)
(plist-get talk :url))
(concat (cond
((or (null (plist-get talk :pronouns)) (string= (plist-get talk :pronouns) "nil"))
(plist-get talk :speakers))
((string-match ", " (plist-get talk :pronouns))
(plist-get talk :pronouns))
(t (format "%s (%s)"
(plist-get talk :speakers)
(plist-get talk :pronouns))))
"\n"
(cond
((string-match "live" (plist-get talk :q-and-a))
"Q&A: live - see talk page for URL")
((string-match "irc" (plist-get talk :q-and-a))
(format "Q&A: IRC (#%s) - speaker nick: %s"
(plist-get track :channel)
(plist-get talk :irc)))
(t "")))))
(defun emacsconf-stream-update-talk-info-org-after-todo-state-change ()
"Update talk info."
(when (string= org-state "PLAYING")
(emacsconf-stream-set-talk-info (emacsconf-get-talk-info-for-subtree))))
(defun emacsconf-stream-play-talk-org-after-todo-state-change ()
"Play the talk."
(when (string= org-state "PLAYING")
(emacsconf-stream-play-video (emacsconf-get-talk-info-for-subtree))))
(defun emacsconf-stream-get-filename (talk)
"Return the local filename for the video file for TALK.
Final files should be stored in /data/emacsconf/stream/YEAR/video-slug--main.webm."
(expand-file-name
(concat (plist-get talk :video-slug) "--main.webm")
(expand-file-name emacsconf-year
emacsconf-stream-dir)))
(defun emacsconf-stream-play-video (talk)
(interactive (list (emacsconf-complete-talk-info)))
(start-process (concat "mpv-" (plist-get talk :slug))
"test"
"ssh" (emacsconf-stream-track-login talk) "nohup" "~/bin/track-mpv" (emacsconf-stream-get-filename talk) "&"))
(provide 'emacsconf-stream)
;;; emacsconf-stream.el ends here
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