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

Returns a new instance of EventMatcher.



250
251
252
253
 
# File 'lib/edl.rb', line 250

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

Instance Attribute Details

#fps ⇒ Object (readonly)

Returns the value of attribute fps.



248
249
250
 
# File 'lib/edl.rb', line 248

def fps
  @fps
end

Instance Method Details

#apply(stack, line) ⇒ Object 



255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
 
# 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