Struct Cea608CueExtractor 

pub struct Cea608CueExtractor { /* private fields */ }

Available on crate feature cc-data only.

Extracts Cues from a single CEA-608 data channel (CTA-608-E), wrapping a cc-data cc_data::decode::Cea608Decoder.

Feed it one access unit’s CEA-608 triplets at a time, tagged with that access unit’s raw (non-unrolled) 33-bit PTS, via push_frame; call finalize at end of stream to close any still-open cue.

use timed_metadata::webvtt::Cea608CueExtractor;
use cc_data::{CcTriplet, CcType};
use cc_data::decode::Cea608Channel;

fn pair(pts: u64, b1: u8, b2: u8) -> (u64, CcTriplet) {
    (
        pts,
        CcTriplet { cc_valid: true, cc_type: CcType::Ntsc608Field1, cc_data_1: b1, cc_data_2: b2 },
    )
}

let mut ex = Cea608CueExtractor::new(Cea608Channel::Cc1);
let frames = [
    pair(0, 0x14, 0x20),       // RCL
    pair(1, 0x14, 0x70),       // PAC row 15
    pair(2, b'H', b'I'),       // "HI"
    pair(3, 0x14, 0x2F),       // EOC -> commits "HI"
    pair(4, 0x14, 0x2C),       // EDM -> erases
];
for (pts, t) in frames {
    ex.push_frame(pts, core::slice::from_ref(&t));
}
let cues = ex.cues();
assert_eq!(cues.len(), 1);
assert_eq!(cues[0].text, "HI");

Implementations

impl Cea608CueExtractor

pub fn new(channel: Cea608Channel) -> Self

A new extractor tracking the given CEA-608 data channel (e.g. Cc1).

pub fn push_frame(&mut self, pts33: u64, triplets: &[CcTriplet])

Feed one access unit’s CEA-608 triplets (already demuxed from its cc_data()), tagged with that access unit’s raw 33-bit PTS. Non-608 triplets in triplets are ignored.

pub fn finalize(&mut self, end_pts33: u64)

Close any still-open cue at end of stream, at end_pts33.

pub fn cues(&self) -> &[Cue]

The cues extracted so far, in order.

pub fn into_cues(self) -> Vec<Cue>

Consume the extractor, returning the extracted cues.