Struct FrameCache 

pub struct FrameCache { /* private fields */ }

Decoded frames held in memory for ranges of a film, so those ranges play without the decoder — an instant start, a loop that never waits on a keyframe.

Ranges are frame numbers, start included and end not, counted from the first frame at the file’s frame rate. The frames are the ranges’ frames, in order, end to end.

Implementations

impl FrameCache

pub fn new(ranges: Vec<(u64, u64)>, frames: Vec<Frame>) -> Result<Self>

A cache of frames for ranges.

Errors

Error::Unsupported for an empty or backwards range, ranges that overlap, or a number of frames that is not what the ranges add up to — each of which would serve the wrong picture rather than fail later.

pub fn get(&self, number: u64) -> Option<&Frame>

The frame numbered number, if a range covers it.

pub fn ranges(&self) -> &[(u64, u64)]

The ranges, sorted.

pub fn len(&self) -> usize

How many frames it holds.

pub fn is_empty(&self) -> bool

Whether it holds none.

pub fn byte_len(&self) -> usize

The memory its pictures take, for holding a show to a budget.

Trait Implementations

impl Clone for FrameCache

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for FrameCache

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

Formats the value using the given formatter.