Struct CamfStream 

pub struct CamfStream<'a> { /* private fields */ }

Incremental decoder of an X3F SECc (CAMF calibration) section.

section is the whole section starting at its SECc signature: a 28-byte header (signature, version, coding type, four type-specific words) followed by the coded data. Three codings exist:

• type 2 (SD9 … SD14): bytes XOR-ed with a pseudo-random stream seeded by word 3;
• type 4 (DP1 … Merrill): a TRUE-style prefix code (table at the start of the data, bit stream at data offset 32) over block_size x block_count (words 2 and 3) 12-bit samples with the TRUE 2x2-phase prediction (seed in word 1), packed two samples per three bytes and cut to the decoded size in word 0;
• type 5 (Quattro): the same code over a running byte sum (seed in word 1), one symbol per decoded byte (decoded size in word 0).

The decoded block is a sequence of CMb* entries. Blocks run to several MiB (mostly spatial gain and defect tables after the colour calibration), so they are decoded on demand: CamfStream::fill extends CamfStream::decoded as far as needed.

Implementations

impl<'a> CamfStream<'a>

pub fn new(section: &'a [u8]) -> Result<Self>

Parse the section header (type 2 blocks are decoded at once).

pub fn decoded(&self) -> &[u8]

The bytes decoded so far.

pub fn is_done(&self) -> bool

True when the whole block is decoded.

pub fn fill(&mut self, len: usize) -> Result<()>

Decode until at least len bytes (or the whole block) are available.