1 files changed, 62 insertions, 0 deletions
diff --git a/src/boxes/tkhd.rs b/src/boxes/tkhd.rs
new file mode 100644
index 0000000..9519940
--- /dev/null
+++ b/src/boxes/tkhd.rs
@@ -0,0 +1,62 @@
+use byteorder::{BigEndian, ByteOrder};
+use four_cc::FourCC;
+
+use bytes::{BufMut, BytesMut};
+
+use crate::Mp4BoxError;
+use crate::{FullBoxHeader, Mp4Box};
+
+use std::mem::size_of;
+
+pub struct TrackHeaderBox {
+    pub creation_time: u64,
+    pub modification_time: u64,
+    pub track_id: u32,
+    pub duration: u64,
+}
+
+impl Mp4Box for TrackHeaderBox {
+    const NAME: FourCC = FourCC(*b"tkhd");
+
+    fn get_full_box_header(&self) -> Option<FullBoxHeader> {
+        Some(FullBoxHeader::new(1, 0)) // TODO: flags matter
+    }
+
+    fn content_size(&self) -> u64 {
+        size_of::<u64>() as u64 + // creation_time
+        size_of::<u64>() as u64 + // modification_time
+        size_of::<u32>() as u64 + // track_ID
+        size_of::<u32>() as u64 + // reserved
+        size_of::<u64>() as u64 + // duration
+        size_of::<u32>() as u64 * 2 + // reserved
+        size_of::<u16>() as u64 + // layer
+        size_of::<u16>() as u64 + // alternate_group
+        size_of::<u16>() as u64 + // volume
+        size_of::<u16>() as u64 + // reserved
+        size_of::<i32>() as u64 * 9 + // matrix
+        size_of::<u32>() as u64 + // width
+        size_of::<u32>() as u64 // height
+    }
+
+    fn write_box_contents(&self, writer: &mut BytesMut) -> Result<(), Mp4BoxError> {
+        let mut contents = [0u8; 92];
+
+        BigEndian::write_u64(&mut contents[..], self.creation_time);
+        BigEndian::write_u64(&mut contents[8..], self.modification_time);
+        BigEndian::write_u32(&mut contents[16..], self.track_id);
+        BigEndian::write_u64(&mut contents[24..], self.duration);
+
+        BigEndian::write_i32(&mut contents[44..], 0); // volume
+
+        BigEndian::write_i32(&mut contents[46..], 0x00010000);
+        BigEndian::write_i32(&mut contents[62..], 0x00010000);
+        BigEndian::write_i32(&mut contents[78..], 0x40000000);
+
+        BigEndian::write_u32(&mut contents[84..], 1); // width
+        BigEndian::write_u32(&mut contents[88..], 2); // height
+
+        writer.put_slice(&contents);
+
+        Ok(())
+    }
+}