
It's interesting WebVTT explicitly handles line & position differently in horizontal-rl/lr and vertical-lr/rl contexts. position is always measured from the left of the viewport, even for rtl text, but line in vertical-rl is measured from the right of the viewport. We don't have to make Cue match WebVTT (I can go change the WebVTT decoding instead) but it seems a reasonable 'default' to follow. PiperOrigin-RevId: 304353900
ExoPlayer library
The ExoPlayer library is split into multiple modules. See ExoPlayer's top level README for more information about the available library modules and how to use them.