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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) 2025 metamuffin <metamuffin.org>
*/
use crate::{cues::generate_cues, stream_info, SMediaInfo};
use anyhow::{anyhow, Result};
use jellyremuxer::{
demuxers::create_demuxer_autodetect, matroska, muxers::write_fragment, ContainerFormat,
};
use jellystream_types::{FormatNum, IndexNum, StreamContainer, TrackNum};
use std::{
fs::File,
io::{Cursor, Read},
sync::Arc,
};
pub fn fragment_stream(
info: Arc<SMediaInfo>,
track: TrackNum,
index: IndexNum,
format_num: FormatNum,
container: StreamContainer,
) -> Result<Box<dyn Read + Send + Sync>> {
let (iinfo, info) = stream_info(info)?;
let (file_index, track_num) = *iinfo
.track_to_file
.get(track)
.ok_or(anyhow!("track not found"))?;
let media_path = iinfo.paths[file_index].clone();
let track = info.tracks.get(track).ok_or(anyhow!("track not found"))?;
let format = track
.formats
.get(format_num)
.ok_or(anyhow!("format not found"))?;
let mk_track = iinfo.metadata[file_index]
.tracks
.as_ref()
.unwrap()
.entries
.iter()
.find(|t| t.track_number == track_num)
.unwrap();
let mk_info = matroska::Info {
duration: Some(info.duration),
timestamp_scale: iinfo.metadata[file_index].info.timestamp_scale,
..Default::default()
};
let mk_tracks = matroska::Tracks {
entries: vec![mk_track.to_owned()],
};
let cue_stat = generate_cues(&media_path)?;
let cluster_offset = cue_stat
.cues
.get(index)
.ok_or(anyhow!("fragment index out of range"))?
.position;
let cluster = {
let media_file = File::open(media_path)?;
let mut media = create_demuxer_autodetect(Box::new(media_file))?
.ok_or(anyhow!("media container unknown"))?;
media.seek_cluster(Some(cluster_offset))?;
media
.read_cluster()?
.ok_or(anyhow!("cluster unexpectedly missing"))?
.1
};
let jr_container = match container {
StreamContainer::WebM => ContainerFormat::Webm,
StreamContainer::Matroska => ContainerFormat::Matroska,
StreamContainer::WebVTT => todo!(),
StreamContainer::MPEG4 => todo!(),
StreamContainer::JVTT => todo!(),
};
if format.remux {
let mut out = Vec::new();
write_fragment(jr_container, &mut out, mk_info, mk_tracks, cluster)?;
Ok(Box::new(Cursor::new(out)))
} else {
todo!()
}
// if format.remux {
// match container {
// StreamContainer::WebM | StreamContainer::Matroska => {
// tokio::task::spawn_blocking(move || {
// if let Err(err) = jellyremuxer::write_fragment_into(
// SyncIoBridge::new(b),
// &path,
// track_num,
// container == StreamContainer::WebM,
// &info.name.unwrap_or_default(),
// index,
// ) {
// warn!("segment stream error: {err}");
// }
// });
// }
// StreamContainer::MPEG4 => {
// tokio::task::spawn_blocking(move || {
// let mut buf = Cursor::new(Vec::new());
// if let Err(err) = jellyremuxer::write_fragment_into(
// &mut buf,
// &path,
// track_num,
// false,
// &info.name.unwrap_or_default(),
// index,
// ) {
// warn!("segment stream error: {err}");
// }
// buf.seek(SeekFrom::Start(0)).unwrap();
// if let Err(err) = matroska_to_mpeg4(buf, SyncIoBridge::new(b)) {
// warn!("mpeg4 transmux failed: {err}");
// }
// });
// }
// StreamContainer::JVTT => {}
// _ => bail!("not yet supported"),
// }
// } else {
// let location = transcode(
// track.kind,
// orig_track,
// format,
// &format!("{path:?} {track_num} {index}"),
// move |b| {
// tokio::task::spawn_blocking(move || {
// if let Err(err) = jellyremuxer::write_fragment_into(
// SyncIoBridge::new(b),
// &path,
// track_num,
// false,
// &info.name.unwrap_or_default(),
// index,
// ) {
// warn!("segment stream error: {err}");
// }
// });
// },
// )
// .await?;
// let mut frag = File::open(location.abs()).await?;
// match container {
// StreamContainer::WebM => {
// tokio::task::spawn_blocking(move || {
// if let Err(err) =
// matroska_to_webm(SyncIoBridge::new(frag), SyncIoBridge::new(b))
// {
// warn!("webm transmux failed: {err}");
// }
// });
// }
// StreamContainer::Matroska => {
// tokio::task::spawn(async move {
// if let Err(err) = tokio::io::copy(&mut frag, &mut b).await {
// warn!("cannot write stream: {err}")
// }
// });
// }
// StreamContainer::MPEG4 => {
// tokio::task::spawn_blocking(move || {
// if let Err(err) =
// matroska_to_mpeg4(SyncIoBridge::new(frag), SyncIoBridge::new(b))
// {
// warn!("mpeg4 transmux failed: {err}");
// }
// });
// }
// _ => bail!("unsupported"),
// }
// }
}
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