Struct FrameInner 

pub struct FrameInner { /* private fields */ }

The owned body of a refcounted Frame.

Holds an Arena (the bytes), a fixed-size table of (offset_in_arena, length_in_bytes) pairs (one per plane), and a FrameHeader. The plane_count field tracks how many entries of plane_offsets are actually populated. Up to MAX_PLANES planes are supported.

Lifetime: an Arena returns its buffer to the pool when dropped. A Rc<FrameInner> keeps the arena alive via its single owned field, so as long as any clone of a Frame exists the underlying buffer stays out of the pool.

Implementations

impl FrameInner

pub fn new( arena: Arena, planes: &[(usize, usize)], header: FrameHeader, ) -> Result<Frame>

Construct a Frame (refcounted Rc<FrameInner>) from an arena, a slice of (offset, length) plane descriptors, and a header. Returns Error::InvalidData if more than MAX_PLANES planes are supplied or if any plane range falls outside the arena’s used region.

pub fn plane_count(&self) -> usize

Number of planes this frame holds.

pub fn plane(&self, i: usize) -> Option<&[u8]>

Read-only access to plane i. Returns None if i is out of range.

pub fn header(&self) -> &FrameHeader

Frame header (width / height / pixel format / pts).