Struct MoofData 

pub struct MoofData {
    pub bytes: Vec<u8>,
    pub data_offset_pos: usize,
}

Full moof blob with the inner trun.data_offset patched up.

Returned by build_moof_video and build_moof_audio. Holds the final byte vector AND knows where inside it the data_offset field lives, so callers can either accept the default offset (immediately after the moof — i.e. mdat starts right after this moof in the file) OR substitute their own if they’re writing some intervening bytes.

The default data_offset is bytes.len() + 8: full moof size plus the 8-byte mdat header. That’s the standard “moof immediately followed by mdat” CMAF layout.

Fields

bytes: Vec<u8>

data_offset_pos: usize

Byte position WITHIN bytes of the 4-byte big-endian data_offset field inside trun. Use Self::patch_data_offset to overwrite it.

Implementations

impl MoofData

pub fn patch_data_offset(&mut self, data_offset: u32)

Patch the trun.data_offset field in place. Call once with the final byte offset from the START of the moof to the START of the mdat payload (i.e. moof_size + 8 for a no-gap layout).

pub fn patch_default_no_gap(&mut self)

Convenience: patch with the default no-gap offset (moof immediately followed by mdat). Use this in the common case where moof + mdat are written contiguously.