gst-plugins-rs/video/closedcaption/src/ttutils.rs

// Copyright (C) 2021 Mathieu Duponchelle <mathieu@centricular.com>
//
// This Source Code Form is subject to the terms of the Mozilla Public License, v2.0.
// If a copy of the MPL was not distributed with this file, You can obtain one at
// <https://mozilla.org/MPL/2.0/>.
//
// SPDX-License-Identifier: MPL-2.0

use serde::{Deserialize, Serialize};

use crate::cea608utils::*;

// TODO allow indenting chunks
#[derive(Clone, Serialize, Deserialize, Debug)]
pub struct Chunk {
    pub style: TextStyle,
    pub underline: bool,
    pub text: String,
}

#[derive(Clone, Serialize, Deserialize, Debug)]
pub struct Line {
    pub column: Option<u32>,
    pub row: Option<u32>,
    pub chunks: Vec<Chunk>,
    /* In roll-up modes, new lines don't introduce a carriage return by
     * default, but that can be overridden */
    pub carriage_return: Option<bool>,
}

#[derive(Clone, Serialize, Deserialize, Debug)]
pub struct Lines {
    pub lines: Vec<Line>,
    pub mode: Option<Cea608Mode>,
    pub clear: Option<bool>,
}

impl Lines {
    pub fn new_empty() -> Self {
        Self {
            lines: vec![],
            mode: None,
            clear: None,
        }
    }
}

impl Cea608Mode {
    pub fn is_rollup(&self) -> bool {
        *self == Cea608Mode::RollUp2 || *self == Cea608Mode::RollUp3 || *self == Cea608Mode::RollUp4
    }
}