Class: EDL::EventMatcher

Inherits:
Matcher show all
Defined in:
lib/edl.rb

Constant Summary collapse

EVENT_PAT =

021 009 V C 00:39:04:21 00:39:05:09 01:00:26:17 01:00:27:05

/(\d+)(\s+)([^\s]+)(\s+)(\w+)(\s+)(\w+)(\s+)((\w+\s+)?)#{TC} #{TC} #{TC} #{TC}/

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods inherited from Matcher

#matches?

Constructor Details

#initialize(some_fps) ⇒ EventMatcher



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# File 'lib/edl.rb', line 250

def initialize(some_fps)
  super(EVENT_PAT)
  @fps = some_fps
end

Instance Attribute Details

#fpsObject (readonly)

Returns the value of attribute fps



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# File 'lib/edl.rb', line 248

def fps
  @fps
end

Instance Method Details

#apply(stack, line) ⇒ Object



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# File 'lib/edl.rb', line 255

def apply(stack, line)
  matches = line.scan(@regexp).shift
  props = {}

  # FIrst one is the event number
  props[:num] = matches.shift
  matches.shift

  # Then the reel
  props[:reel] = matches.shift
  matches.shift

  # Then the track
  props[:track] = matches.shift
  matches.shift

  # Then the type
  props[:transition] = matches.shift
  matches.shift

  # Then the optional generator group - skip for now
  if props[:transition] != 'C'
    props[:duration] = matches.shift.strip
  else
    matches.shift
  end
  matches.shift

  # Then the timecodes
  [:src_start_tc, :src_end_tc, :rec_start_tc, :rec_end_tc].each do |k|
    begin
      props[k] = EDL::Parser.timecode_from_line_elements(matches, @fps)
    rescue Timecode::Error => e
      raise ApplyError.new("Cannot parse timecode - #{e}", line)
    end
  end

  evt = Event.new
  transition_idx = props.delete(:transition)
  evt.transition = case transition_idx
                   when 'C'
                     nil
                   when 'D'
                     d = Dissolve.new
                     d.duration = props.delete(:duration).to_i
                     d
                   when /W(\d+)/
                     w = Wipe.new
                     w.duration = props.delete(:duration).to_i
                     w.smpte_wipe_index = transition_idx.delete('W')
                     w
                   when 'K'
                     k = Key.new
                     k.duration = props.delete(:duration).to_i
                     k
                   else
                     raise "Unknown transition type #{transition_idx}"
  end

  # Give a hint on the incoming clip as well
  if evt.transition && stack[-1]
    stack[-1].outgoing_transition_duration = evt.transition.duration
  end

  props.each_pair { |k, v| evt.send("#{k}=", v) }

  stack << evt
  evt # FIXME: - we dont need to return this is only used by tests
end