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-rw-r--r--remuxer/src/lib.rs249
1 files changed, 180 insertions, 69 deletions
diff --git a/remuxer/src/lib.rs b/remuxer/src/lib.rs
index cc508e8..523569a 100644
--- a/remuxer/src/lib.rs
+++ b/remuxer/src/lib.rs
@@ -1,8 +1,23 @@
-pub mod import;
pub mod format;
+pub mod import;
-use jellycommon::ItemInfo;
-use std::{io::Write, path::PathBuf, sync::Arc};
+use anyhow::Result;
+use jellycommon::{ItemInfo, SourceTrack, SourceTrackKind};
+use jellymatroska::{
+ block::Block,
+ read::EbmlReader,
+ unflatten::{Unflat, Unflatten},
+ write::{write_vint, EbmlWriter},
+ Master, MatroskaTag,
+};
+use log::{debug, error, info, trace, warn};
+use std::{
+ collections::{BTreeMap, HashMap},
+ fs::File,
+ io::Write,
+ path::PathBuf,
+ sync::Arc,
+};
pub struct RemuxerContext {}
@@ -13,83 +28,179 @@ impl RemuxerContext {
pub fn generate_into(
&self,
- writer: impl Write,
+ writer: impl Write + 'static,
offset: usize,
path_base: PathBuf,
- item: ItemInfo,
+ iteminfo: ItemInfo,
selection: Vec<u64>,
) -> anyhow::Result<()> {
- // let source_path = path_base.join(item.source.path);
- // info!("remuxing {source_path:?} to have tracks {selection:?}");
- // let mut input = File::open(source_path)?;
+ let source_path = path_base.join(format!("demon-slayer-1.mkv"));
+ info!("remuxing {source_path:?} to have tracks {selection:?}");
+
+ let input = File::open(source_path)?;
+ let mut input = EbmlReader::new(input);
+ let mut output = EbmlWriter::new(writer, 0);
+
+ // maps original to remuxed
+ let mapping = BTreeMap::from_iter(
+ selection
+ .iter()
+ .enumerate()
+ .map(|(i, e)| (*e, i as u64 + 1)),
+ );
+ info!("track mapping: {mapping:?}");
+
+ output.write_tag(&MatroskaTag::Ebml(Master::Collected(vec![
+ MatroskaTag::EbmlVersion(1),
+ MatroskaTag::EbmlReadVersion(1),
+ MatroskaTag::EbmlMaxIdLength(4),
+ MatroskaTag::EbmlMaxSizeLength(8),
+ MatroskaTag::DocType("matroska".to_string()),
+ MatroskaTag::DocTypeVersion(4),
+ MatroskaTag::DocTypeReadVersion(2),
+ ])))?;
+
+ output.write_tag(&MatroskaTag::Segment(Master::Start))?;
+
+ output.write_tag(&MatroskaTag::Info(Master::Collected(vec![
+ MatroskaTag::Title(iteminfo.title.clone()),
+ MatroskaTag::Duration(1000.0),
+ MatroskaTag::MuxingApp("jellyremux".to_string()),
+ MatroskaTag::WritingApp("jellything".to_string()),
+ ])))?;
+
+ let tracks_header = MatroskaTag::Tracks(Master::Collected(
+ mapping
+ .iter()
+ .map(|(norig, nrem)| track_to_ebml(*nrem, &iteminfo.tracks.get(norig).unwrap()))
+ .collect(),
+ ));
+ info!("track header: {tracks_header:?}");
+ output.write_tag(&tracks_header)?;
- // let tags = WebmIterator::new(&mut input, &[MatroskaSpec::TrackEntry(Master::Start)]);
- // let mut output = WebmWriter::new(writer);
+ while let Some(item) = input.next() {
+ let item = match item {
+ Ok(item) => item,
+ Err(e) => {
+ warn!("{e}");
+ break;
+ }
+ };
+ match item {
+ MatroskaTag::Segment(_) => {
+ info!("segment start");
+ let mut children = Unflatten::new_with_end(&mut input, item);
+ filter_segment(&mut children, &mut output, &iteminfo, &mapping)?;
+ info!("segment end");
+ }
+ _ => debug!("(r) tag ignored: {item:?}"),
+ }
+ }
- // let mut tscale = None;
- // let mut duration = None;
- // let mut ignore = false;
+ output.write_tag(&MatroskaTag::Segment(Master::End))?;
- // for tag in tags {
- // let tag = tag.unwrap();
- // match tag {
- // MatroskaSpec::SeekHead(Master::Start) | MatroskaSpec::Cues(Master::Start) => {
- // ignore = true
- // }
- // MatroskaSpec::SeekHead(Master::End) | MatroskaSpec::Cues(Master::End) => {
- // ignore = false
- // }
- // MatroskaSpec::TrackEntry(master) => {
- // let children = master.get_children();
- // let mut number = None;
- // for c in &children {
- // if let MatroskaSpec::TrackNumber(n) = c {
- // number = Some(*n)
- // }
- // }
- // let number = number.unwrap();
- // if selection.contains(&number) {
- // output.write(&MatroskaSpec::TrackEntry(Master::Full(children)))?;
- // }
- // }
- // MatroskaSpec::Block(ref data) => {
- // let data: &[u8] = &data;
- // let block: Block = data.try_into()?;
- // if selection.contains(&block.track) {
- // output.write(&tag)?;
- // }
- // }
- // MatroskaSpec::SimpleBlock(ref data) => {
- // let data: &[u8] = &data;
- // let block: Block = data.try_into()?;
- // if selection.contains(&block.track) {
- // output.write(&tag)?;
- // }
- // }
- // MatroskaSpec::Info(Master::Start) => (),
- // MatroskaSpec::TimestampScale(n) => tscale = Some(n),
- // MatroskaSpec::Duration(n) => duration = Some(n),
- // MatroskaSpec::Info(Master::End) => {
- // output.write(&MatroskaSpec::Info(Master::Full(vec![
- // MatroskaSpec::TimestampScale(tscale.unwrap()),
- // MatroskaSpec::Title(item.title.clone()),
- // MatroskaSpec::Duration(duration.unwrap()),
- // MatroskaSpec::MuxingApp("jellyremux".to_string()),
- // MatroskaSpec::WritingApp("jellything".to_string()),
- // ])))?;
- // }
- // x => {
- // if !ignore {
- // debug!("{x:?}");
- // output.write(&x)?;
- // }
- // }
- // }
- // }
Ok(())
}
}
+fn filter_segment(
+ children: &mut Unflatten,
+ writer: &mut EbmlWriter,
+ iteminfo: &ItemInfo,
+ mapping: &BTreeMap<u64, u64>,
+) -> Result<()> {
+ while let Some(Ok(Unflat { children, item })) = children.next() {
+ match item {
+ MatroskaTag::SeekHead(_) => {}
+ MatroskaTag::Info(_) => {}
+ MatroskaTag::Cluster(_) => {
+ let mut cluster = vec![];
+ info!("start of cluster found");
+ let mut children = children.unwrap();
+ while let Some(Ok(Unflat { children, item })) = children.next() {
+ match item {
+ MatroskaTag::BlockGroup(_) => {
+ debug!("group");
+ let mut children = children.unwrap();
+ let mut group = vec![];
+ while let Some(Ok(Unflat { children, item })) = children.next() {
+ match item {
+ MatroskaTag::Block(buf) => {
+ let mut block = Block::parse(&buf)?;
+ if let Some(outnum) = mapping.get(&block.track) {
+ block.track = *outnum;
+ debug!(
+ "block: track={} tso={}",
+ block.track, block.timestamp_off
+ );
+ group.push(MatroskaTag::Block(block.dump()));
+ }
+ }
+ _ => trace!("{item:?}"),
+ }
+ }
+ cluster.push(MatroskaTag::BlockGroup(Master::Collected(group)));
+ }
+ MatroskaTag::SimpleBlock(buf) => {
+ let mut block = Block::parse(&buf)?;
+ if let Some(outnum) = mapping.get(&block.track) {
+ block.track = *outnum;
+ debug!("block: track={} tso={}", block.track, block.timestamp_off);
+ cluster.push(MatroskaTag::SimpleBlock(block.dump()));
+ }
+ }
+ _ => debug!("(rsc) tag ignored: {item:?}"),
+ }
+ }
+ writer.write_tag(&MatroskaTag::Cluster(Master::Collected(cluster)))?;
+ }
+ MatroskaTag::Tags(_) => {}
+ MatroskaTag::Cues(_) => {}
+ MatroskaTag::Chapters(_) => {}
+ MatroskaTag::Tracks(_) => {}
+ _ => debug!("(rs) tag ignored: {item:?}"),
+ }
+ }
+ Ok(())
+}
+
+pub fn track_to_ebml(number: u64, track: &SourceTrack) -> MatroskaTag {
+ let mut els = Vec::new();
+ els.push(MatroskaTag::TrackNumber(number));
+ els.push(MatroskaTag::TrackUID(number));
+ els.push(MatroskaTag::FlagLacing(0));
+ els.push(MatroskaTag::Language(track.language.clone()));
+ els.push(MatroskaTag::CodecID(track.codec.clone()));
+ match track.kind {
+ SourceTrackKind::Video { width, height, fps } => {
+ els.push(MatroskaTag::TrackType(1));
+ els.push(MatroskaTag::DefaultDuration(41708333)); // TODO pls not hardcoded
+ els.push(MatroskaTag::Video(Master::Collected(vec![
+ MatroskaTag::PixelWidth(width),
+ MatroskaTag::PixelHeight(height),
+ ])))
+ }
+ SourceTrackKind::Audio {
+ channels,
+ sample_rate,
+ bit_depth,
+ } => {
+ els.push(MatroskaTag::TrackType(2));
+ els.push(MatroskaTag::Audio(Master::Collected(vec![
+ MatroskaTag::SamplingFrequency(sample_rate),
+ MatroskaTag::Channels(channels.try_into().unwrap()),
+ ])))
+ }
+ SourceTrackKind::Subtitles => {
+ els.push(MatroskaTag::TrackType(19));
+ }
+ }
+ if let Some(d) = &track.codec_private {
+ els.push(MatroskaTag::CodecPrivate(d.clone()));
+ }
+ MatroskaTag::TrackEntry(Master::Collected(els))
+}
+
// pub struct SendWriter(pub Sender<Vec<u8>>);
// impl Write for SendWriter {
generated by cgit v1.2.3-70-g09d2 (git 2.51.0) at 2025-10-08 18:23:14 +0000