Class: CaptionCrunch::Adapters::VTT

Inherits:
Object
  • Object
show all
Defined in:
lib/caption_crunch/adapters/vtt.rb

Constant Summary collapse

SIGNATURE_REGEX = 
/\AWEBVTT\Z|\AWEBVTT[ \t\n]/.freeze
COMMENT_REGEX = 
/\ANOTE\Z|\ANOTE[ \t\n]/.freeze
ARROW_REGEX = 
/-->/.freeze
TIME_REGEX =

Format: hour:minute:second.milliseconds

hour: is optional.
11:22:33
00:11:22:333
102:01:43:204

dev.w3.org/html5/webvtt/#dfn-collect-a-webvtt-timestamp

/\A(?:(\d\d+):)?([0-5]\d):([0-5]\d)\.(\d\d\d)\Z/.freeze
NEWLINE_REGEX = 
/\n/.freeze

Class Method Summary collapse

Class Method Details

.parse(file) ⇒ Object

Reads a file (or string) and returns a CaptionCrunch::Track instance. Raises CaptionCrunch::ParseError if the input is malformed.



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# File 'lib/caption_crunch/adapters/vtt.rb', line 19

def parse(file)
  contents = remove_bom(read_file(file))
  normalized = normalize_linefeeds(contents)
  segments = split_segments(normalized)
  ensure_signature(segments.shift)

  Track.new.tap do |track|
    segments.each do |segment|
      next if comment?(segment)
      track.cues << parse_cue(segment)
    end
  end
end