Methods
init(datanon-null)
    Initialize the caption parser. This should be called only once.
    Parameters:
| Name | Type | Description | 
|---|---|---|
| data | ArrayBuffer | 
parseFrom(datanon-null, onCaptions)
    Parses embedded CEA closed captions and interacts with the underlying
CaptionStream, and calls the callback function when there are closed
captions.
    Parameters:
| Name | Type | Description | 
|---|---|---|
| data | ArrayBuffer | |
| onCaptions | function(Array.<muxjs.mp4.ClosedCaption>) | A callback function to handle the closed captions from parsed data. |