fix(WebVTT): Add support to middle position (shaka-project#5366)

This setting is used in https://devstreaming-cdn.apple.com/videos/streaming/examples/adv_dv_atmos/main.m3u8 (Apple HLS example)
theodab · Jun 28, 2023 · 5691d5e · 5691d5e
1 parent 35cb193
commit 5691d5e
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/lib/text/vtt_text_parser.js b/lib/text/vtt_text_parser.js
@@ -783,7 +783,8 @@ shaka.text.VttTextParser = class {
     } else if ((results = /^size:([\d.]+)%$/.exec(word))) {
       cue.size = Number(results[1]);
     } else if ((results =
-        /^position:([\d.]+)%(?:,(line-left|line-right|center|start|end))?$/
+        // eslint-disable-next-line max-len
+        /^position:([\d.]+)%(?:,(line-left|line-right|middle|center|start|end))?$/
             .exec(word))) {
       cue.position = Number(results[1]);
       if (results[2]) {