non-seekable mkv almost works

1 files changed, 18 insertions, 1 deletions

diff --git a/matroska/src/block.rs b/matroska/src/block.rs
index b0d6f6b..dd5b340 100644
--- a/matroska/src/block.rs
+++ b/matroska/src/block.rs
@@ -1,4 +1,4 @@
-use crate::read::ReadExt;
+use crate::{read::ReadExt, write::write_vint};
 use anyhow::Result;
 use std::io::Cursor;
 
@@ -40,4 +40,21 @@ impl Block {
             timestamp_off,
         })
     }
+    pub fn dump(&self) -> Vec<u8> {
+        let mut out = vec![];
+        write_vint(&mut out, self.track).unwrap();
+        out.extend(self.timestamp_off.to_be_bytes().into_iter());
+        out.push(
+            match self.invisible {
+                true => 0b10000,
+                false => 0b00000,
+            } | match self.lacing {
+                Some(LacingType::Xiph) => 0b0100,
+                Some(LacingType::Ebml) => 0b1000,
+                Some(LacingType::FixedSize) => 0b1100,
+                None => 0b0000,
+            },
+        );
+        out
+    }
 }