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/*
This file is part of jellything (https://codeberg.org/metamuffin/jellything)
which is licensed under the GNU Affero General Public License (version 3); see /COPYING.
Copyright (C) 2024 metamuffin <metamuffin.org>
*/
use anyhow::anyhow;
use jellycommon::jhls::SubtitleCue;
use std::fmt::Write;
// TODO discontinued for now. since this should be snippetized aswell.
pub fn write_webvtt(title: String, subtitles: Vec<SubtitleCue>) -> anyhow::Result<String> {
let mut out = String::new();
writeln!(out, "WEBVTT - {title}")?; // TODO ensure title does not contain "-->"
writeln!(out)?;
for SubtitleCue {
start,
end,
content,
} in subtitles
{
writeln!(out, "{} --> {}", format_time(start), format_time(end))?;
writeln!(out, "- {content}")?;
writeln!(out)?;
}
Ok(out)
}
pub fn parse_webvtt_blocks(blocks: Vec<(u64, u64, Vec<u8>)>) -> anyhow::Result<Vec<SubtitleCue>> {
let mut out = Vec::new();
for (pts, dur, block) in blocks {
let content = String::from_utf8_lossy(&block).trim().to_string();
out.push(SubtitleCue {
content,
start: pts as f64 / 1000.,
end: (pts + dur) as f64 / 1000.,
})
}
Ok(out)
}
pub fn parse_ass_blocks(
_codec_private: Vec<u8>,
blocks: Vec<(u64, u64, Vec<u8>)>,
) -> anyhow::Result<Vec<SubtitleCue>> {
// TODO dont ignore codec_private
fn convert_block(s: &str) -> Option<&str> {
// ReadOrder, Layer, Style, Name, MarginL, MarginR, MarginV, Effect, Text
let (_read_order, s) = s.split_once(',')?;
let (_layer, s) = s.split_once(',')?;
let (_style, s) = s.split_once(',')?;
let (_name, s) = s.split_once(',')?;
let (_marginl, s) = s.split_once(',')?;
let (_marginr, s) = s.split_once(',')?;
let (_marginv, s) = s.split_once(',')?;
let (_effect, text) = s.split_once(',')?;
Some(text)
}
let mut out = Vec::new();
for (pts, dur, block) in blocks {
let block = String::from_utf8(block)?;
let text = convert_block(&block).ok_or(anyhow!("bad ass xD"))?;
out.push(SubtitleCue {
content: text.to_owned(),
start: pts as f64 / 1000.,
end: (pts + dur) as f64 / 1000.,
})
}
Ok(out)
}
fn format_time(t: f64) -> String {
const SECOND: u64 = 1000;
const MINUTE: u64 = SECOND * 60;
const HOUR: u64 = MINUTE * 60;
let t = (t * 1000.) as u64;
let hh = t / HOUR;
let t = t % HOUR;
let mm = t / MINUTE;
let t = t % MINUTE;
let ss = t / SECOND;
let mmm = t % SECOND;
format!("{hh:04}:{mm:02}:{ss:02}.{mmm:03}")
}
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