From f7e3841426ed4661ede6ccfff9c306141735d465 Mon Sep 17 00:00:00 2001
From: metamuffin <metamuffin@disroot.org>
Date: Fri, 26 Sep 2025 14:35:23 +0200
Subject: refactor remuxer trait; add webm support; add back transcoding

---
 transcoder/src/fragment.rs | 69 ++++++++++++++++++++++++++++++++--------------
 transcoder/src/lib.rs      |  2 +-
 2 files changed, 50 insertions(+), 21 deletions(-)

(limited to 'transcoder')

diff --git a/transcoder/src/fragment.rs b/transcoder/src/fragment.rs
index 4cd8b6f..c94b877 100644
--- a/transcoder/src/fragment.rs
+++ b/transcoder/src/fragment.rs
@@ -5,30 +5,36 @@
 */
 use crate::{Config, CONF, LOCAL_VIDEO_TRANSCODING_TASKS};
 use anyhow::Result;
-use jellycache::{async_cache_file, CachePath};
+use jellycache::cache_file;
+use jellyremuxer::{demuxers::create_demuxer, muxers::write_fragment, ContainerFormat};
 use jellystream_types::{StreamFormatInfo, TrackKind};
 use log::info;
 use std::fmt::Write;
-use std::process::Stdio;
-use tokio::{
-    io::copy,
-    process::{ChildStdin, Command},
-};
-use winter_matroska::TrackEntry as MatroskaTrackEntry;
+use std::fs::File;
+use std::io::{copy, Write as W2};
+use std::process::{Command, Stdio};
+use std::thread::spawn;
+use winter_matroska::{Segment, TrackEntry as MatroskaTrackEntry};
 
 // TODO odd video resolutions can cause errors when transcoding to YUV42{0,2}
 // TODO with an implementation that cant handle it (SVT-AV1 is such an impl).
 
-pub async fn transcode(
+pub fn transcode(
     kind: TrackKind,
-    orig_metadata: &MatroskaTrackEntry,
-    format: &StreamFormatInfo,
     input_key: &str,
-    input: impl FnOnce(ChildStdin),
-) -> anyhow::Result<CachePath> {
-    let command = transcode_command(kind, orig_metadata, format, &*CONF).unwrap();
-    async_cache_file("frag-tc", (input_key, &command), async |mut output| {
-        let _permit = LOCAL_VIDEO_TRANSCODING_TASKS.acquire().await?;
+    output_format: &StreamFormatInfo,
+    input: Segment,
+) -> Result<Segment> {
+    let command = transcode_command(
+        kind,
+        &input.tracks.as_ref().unwrap().entries[0],
+        output_format,
+        &*CONF,
+    )
+    .unwrap();
+
+    let output = cache_file("frag-tc", (input_key, &command), |mut output| {
+        let _permit = LOCAL_VIDEO_TRANSCODING_TASKS.lock().unwrap();
         info!("encoding with {command:?}");
         let mut args = command.split(" ");
         let mut proc = Command::new(args.next().unwrap())
@@ -37,17 +43,40 @@ pub async fn transcode(
             .args(args)
             .spawn()?;
 
-        let stdin = proc.stdin.take().unwrap();
+        let mut stdin = proc.stdin.take().unwrap();
         let mut stdout = proc.stdout.take().unwrap();
 
-        input(stdin);
-        copy(&mut stdout, &mut output).await?;
+        spawn(move || {
+            copy(&mut stdout, &mut output).unwrap();
+        });
+
+        write_fragment(ContainerFormat::Matroska, &mut stdin, input)?;
+        stdin.flush()?;
+        drop(stdin);
 
-        proc.wait().await.unwrap().exit_ok()?;
+        proc.wait().unwrap().exit_ok()?;
         info!("done");
         Ok(())
+    })?;
+
+    let mut demuxer = create_demuxer(
+        ContainerFormat::Matroska,
+        Box::new(File::open(output.abs())?),
+    );
+
+    let info = demuxer.info()?;
+    let tracks = demuxer.tracks()?;
+    let mut clusters = Vec::new();
+    while let Some((_, cluster)) = demuxer.read_cluster()? {
+        clusters.push(cluster);
+    }
+
+    Ok(Segment {
+        info,
+        tracks,
+        clusters,
+        ..Default::default()
     })
-    .await
 }
 
 fn transcode_command(
diff --git a/transcoder/src/lib.rs b/transcoder/src/lib.rs
index 665f470..1eac15b 100644
--- a/transcoder/src/lib.rs
+++ b/transcoder/src/lib.rs
@@ -37,4 +37,4 @@ static CONF: LazyLock<Config> = LazyLock::new(|| {
 });
 
 static LOCAL_IMAGE_TRANSCODING_TASKS: Semaphore = Semaphore::const_new(8);
-static LOCAL_VIDEO_TRANSCODING_TASKS: Semaphore = Semaphore::const_new(2);
+static LOCAL_VIDEO_TRANSCODING_TASKS: Mutex<()> = Mutex::new(());
-- 
cgit v1.2.3-70-g09d2