Struct FileBackend 

pub struct FileBackend { /* private fields */ }

Seekable file-backed media source.

This backend can copy byte ranges with MediaReadAt::read_at, but it does not expose borrowed windows. A future sliding-window backend can build on the same typed range/error contract while adding cache-backed window_at.

Implementations

impl FileBackend

pub fn open(path: impl AsRef<Path>) -> Result<Self, ReadAtError>

pub fn from_file(file: File) -> Result<Self, ReadAtError>

Trait Implementations

impl Debug for FileBackend

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl MediaReadAt for FileBackend

fn len_u64(&self) -> u64

Total length of the source in bytes.

fn read_at( &self, range: ByteRange, dst: &mut [u8], ) -> Result<usize, ReadAtError>

Copy exactly range.len bytes into dst.

fn window_at(&self, _range: ByteRange) -> Result<&[u8], ReadAtError>

Borrow exactly range.len bytes from the source.

fn is_empty(&self) -> bool

fn window_at_partial(&self, range: ByteRange) -> Result<&[u8], ReadAtError>

Borrow up to range.len bytes. The offset must still be in bounds.

fn as_contiguous(&self) -> Option<&[u8]>

Return the complete contiguous source only for compatibility paths.

fn stats(&self) -> SourceStats