getAvailableCaptionLanguages method

Future<void> getAvailableCaptionLanguages(
  1. {required MediaItem item,
  2. required bool checkMounted(
      ),
    1. required bool autoGenerated}
    )

    Get the available languages for a video's closed captions with caching.

    Implementation

    Future<void> getAvailableCaptionLanguages({
  required MediaItem item,
  required bool Function() checkMounted,
  required bool autoGenerated,
}) async {
  while (!checkMounted() || _fetchingCaptions.isNotEmpty) {
    await Future.delayed(const Duration(milliseconds: 200), () {});
  }

  String url = item.mediaIdentifier;

  try {
    _fetchingCaptions.add(url);
    ClosedCaptionManifest manifest = await getClosedCaptionsManifest(item);
    List<String> autoLanguageCodes = [];
    List<String> ccLanguageCodes = [];

    for (ClosedCaptionTrackInfo trackInfo in manifest.tracks) {
      String languageCode = trackInfo.language.code;

      if (trackInfo.isAutoGenerated) {
        autoLanguageCodes.add(languageCode);
      } else {
        ccLanguageCodes.add(languageCode);
      }
    }

    setCaptionsLanguages(
      item: item,
      captionsLanguages: autoLanguageCodes,
      autoGenerated: true,
    );
    setCaptionsLanguages(
      item: item,
      captionsLanguages: ccLanguageCodes,
      autoGenerated: false,
    );
  } finally {
    _fetchingCaptions.remove(url);
  }
}