Struct LjpegHeader 

pub struct LjpegHeader {
    pub bits: u32,
    pub width: u32,
    pub height: u32,
    pub components: Vec<Component>,
    pub clrs: u32,
    pub sraw: u32,
    pub predictor: u32,
    pub point_transform: u32,
    pub restart_interval: u32,
    pub scan_offset: usize,
    /* private fields */
}

A parsed lossless JPEG stream (headers only; decoding is on demand).

Fields

bits: u32

Sample precision in bits (after point transform).

width: u32

Frame width in MCUs (samples per line per component).

height: u32

components: Vec<Component>

clrs: u32

Values per MCU column: ncomp + extra luma samples for sRAW.

sraw: u32

Number of extra luma samples per MCU (0 = normal frame).

predictor: u32

point_transform: u32

restart_interval: u32

scan_offset: usize

Offset of entropy-coded data in the input.

Implementations

impl LjpegHeader

pub fn parse(data: &[u8], opts: LjpegOptions) -> Result<Self>

Parse markers up to and including the first SOS.

pub fn row_len(&self) -> usize

Values per decoded row.

pub fn table(&self, i: usize) -> Option<&HuffTable>

Huffman table used for value position i of an MCU (i < clrs). Lets vendor codecs with non-standard sample layouts (e.g. Sony YCbCr) reuse the parsed stream headers.

Trait Implementations

impl Clone for LjpegHeader

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 LjpegHeader

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

Formats the value using the given formatter.