rx-player/src/main_thread/text_displayer/native/native_parsers.ts

Canal+ HTML5 Video Player

import type { ICompatVTTCue } from "../../../compat/browser_compatibility_types";
import features from "../../../features";
import log from "../../../log";

/**
 * Convert text track data into timed VTT Cues.
 * @param {string} type - Text track format wanted
 * @param {string} data - Text track data
 * @param {Number} timestampOffset - offset to apply to every timed text
 * @param {string} [language] - language of the text tracks
 * @returns {Array.<VTTCue>}
 * @throws Error - Throw if no parser is found for the given type
 */
export default function parseTextTrackToCues(
  type: string,
  data: string,
  timestampOffset: number,
  language?: string,
): Array<ICompatVTTCue | TextTrackCue> {
  log.debug("NTSB: Finding parser for native text tracks:", type);
  const parser = features.nativeTextTracksParsers[type];

  if (typeof parser !== "function") {
    throw new Error("no parser found for the given text track");
  }

  log.debug("NTSB: Parser found, parsing...");
  const parsed = parser(data, timestampOffset, language);
  log.debug("NTSB: Parsed successfully!", parsed.length);
  return parsed;
}