1 files changed, 80 insertions, 2 deletions
diff --git a/remuxer/src/lib.rs b/remuxer/src/lib.rs
index 9a5e6c6..e1f8c80 100644
--- a/remuxer/src/lib.rs
+++ b/remuxer/src/lib.rs
@@ -5,9 +5,87 @@
 */
 pub mod import;
 pub mod remux;
+pub mod seek_index;
 pub mod segment_extractor;
-pub mod trim_writer;
 pub mod snippet;
-pub mod seek_index;
+pub mod trim_writer;
 
 pub use remux::remux_stream_into;
+pub use snippet::write_snippet_into;
+
+use jellycommon::{SourceTrack, SourceTrackKind};
+use jellymatroska::{Master, MatroskaTag};
+
+pub fn ebml_header(webm: bool) -> MatroskaTag {
+    MatroskaTag::Ebml(Master::Collected(vec![
+        MatroskaTag::EbmlVersion(1),
+        MatroskaTag::EbmlReadVersion(1),
+        MatroskaTag::EbmlMaxIdLength(4),
+        MatroskaTag::EbmlMaxSizeLength(8),
+        MatroskaTag::DocType(if webm {
+            "webm".to_string()
+        } else {
+            "matroska".to_string()
+        }),
+        MatroskaTag::DocTypeVersion(4),
+        MatroskaTag::DocTypeReadVersion(2),
+    ]))
+}
+pub fn ebml_segment_info(title: String, duration: f64) -> MatroskaTag {
+    MatroskaTag::Info(Master::Collected(vec![
+        MatroskaTag::TimestampScale(1_000_000),
+        MatroskaTag::Duration(duration * 1000.0),
+        MatroskaTag::Title(title),
+        MatroskaTag::MuxingApp("jellyremux".to_string()),
+        MatroskaTag::WritingApp("jellything".to_string()),
+    ]))
+}
+
+pub fn ebml_track_entry(
+    number: u64,
+    track: &SourceTrack,
+    codec_private: Option<Vec<u8>>,
+) -> MatroskaTag {
+    let mut els = vec![
+        MatroskaTag::TrackNumber(number),
+        MatroskaTag::TrackUID(number),
+        MatroskaTag::FlagLacing(0),
+        MatroskaTag::Language(track.language.clone()),
+        MatroskaTag::CodecID(track.codec.clone()),
+    ];
+    if let Some(d) = &track.default_duration {
+        els.push(MatroskaTag::DefaultDuration(*d));
+    }
+    match track.kind {
+        SourceTrackKind::Video {
+            width,
+            height,
+            fps: _,
+        } => {
+            els.push(MatroskaTag::TrackType(1));
+            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()),
+            ])));
+            els.push(MatroskaTag::BitDepth(bit_depth.try_into().unwrap()));
+        }
+        SourceTrackKind::Subtitles => {
+            els.push(MatroskaTag::TrackType(19));
+        }
+    }
+    if let Some(d) = &codec_private {
+        els.push(MatroskaTag::CodecPrivate(d.clone()));
+    }
+    MatroskaTag::TrackEntry(Master::Collected(els))
+}