ovenplayer/src/js/api/caption/parser/SrtParser.js

OvenPlayer is Open-Source HTML5 Player. OvenPlayer supports WebRTC Signaling from OvenMediaEngine for Sub-Second Latency Streaming.

/**
 * Created by hoho on 2018. 5. 29..
 */
import { hmsToSecond, trim } from "utils/strings"

function _entry(data) {
    var entry = {};
    var array = data.split('\r\n');
    if (array.length === 1) {
        array = data.split('\n');
    }
    var idx = 1;
    if (array[0].indexOf(' --> ') > 0) {
        idx = 0;
    }
    if (array.length > idx + 1 && array[idx + 1]) {
        // This line contains the start and end.
        var line = array[idx];
        var index = line.indexOf(' --> ');
        if (index > 0) {
            entry.start = hmsToSecond(line.substr(0, index));
            entry.end = hmsToSecond(line.substr(index + 5));
            entry.text = array.slice(idx + 1).join('\r\n');
        }
    }
    return entry;

}

const SrtParser = function(data) {
    var captions = [];

    data = trim(data);

    var list = data.split('\r\n\r\n');
    if (list.length === 1) {
        list = data.split('\n\n');
    }



    for (var i = 0; i < list.length; i++) {
        if (list[i] === 'WEBVTT') {
            continue;
        }
        var entry = _entry(list[i]);
        if (entry.text) {
            captions.push(entry);
        }
    }

    return captions;
}



export default SrtParser;