1 ;;; srt2vtt --- SRT to WebVTT converter
2 ;;; Copyright © 2015 David Thompson <davet@gnu.org>
4 ;;; srt2vtt is free software; you can redistribute it and/or modify it
5 ;;; under the terms of the GNU General Public License as published by
6 ;;; the Free Software Foundation; either version 3 of the License, or
7 ;;; (at your option) any later version.
9 ;;; srt2vtt is distributed in the hope that it will be useful, but
10 ;;; WITHOUT ANY WARRANTY; without even the implied warranty of
11 ;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 ;;; General Public License for more details.
14 ;;; You should have received a copy of the GNU General Public License
15 ;;; along with srt2vtt. If not, see <http://www.gnu.org/licenses/>.
17 (define-module (srt2vtt webvtt)
18 #:use-module (ice-9 format)
19 #:use-module (ice-9 match)
20 #:use-module (srfi srfi-1)
21 #:use-module (srfi srfi-26)
22 #:use-module (srt2vtt)
23 #:export (write-webvtt
26 (define (write-time time port)
27 "Write TIME as a WebVTT formatted timestamp to PORT."
30 (format port "~2,'0d:~2,'0d:~2,'0d.~3,'0d" h m s ms))))
32 (define (write-webvtt subtitle port)
33 "Write SUBTITLE as a WebVTT formatted subtitle to PORT."
34 (format port "~a~%" (subtitle-id subtitle))
35 (write-time (subtitle-start subtitle) port)
36 (display " --> " port)
37 (write-time (subtitle-end subtitle) port)
39 (format port "~a~%" (string-join (subtitle-text subtitle) "\n"))
42 (define (write-webvtts subtitles port)
43 "Write all SUBTITLES as WebVTT formatted subtitles to PORT."
44 (format port "WEBVTT~%~%")
45 (for-each (cut write-webvtt <> port) subtitles))