SubtitleRendererIsd

SubtitleRendererIsd is a plugin renderer for subtitles in TTML format. It is registered with the Subtitles component and creates DOM output from isd (Intermediate Synchronic Document) subtitle cues. The renderer currently supports rudimentary structure parsing (div, p, span, br) and ignores formatting and styling instructions. This component is intended for rendering embedded TTML subtitles provided by streaming engines like DASH.js.