Class: SwfRuby::Swf::Header

Inherits:
Object
  • Object
show all
Defined in:
lib/swf_ruby/swf/header.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Attribute Details

#compressed ⇒ Object

Returns the value of attribute compressed.



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# File 'lib/swf_ruby/swf/header.rb', line 6

def compressed
  @compressed
end

#file_length ⇒ Object

Returns the value of attribute file_length.



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# File 'lib/swf_ruby/swf/header.rb', line 8

def file_length
  @file_length
end

#frame_count ⇒ Object

Returns the value of attribute frame_count.



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# File 'lib/swf_ruby/swf/header.rb', line 11

def frame_count
  @frame_count
end

#frame_rate ⇒ Object

Returns the value of attribute frame_rate.



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# File 'lib/swf_ruby/swf/header.rb', line 10

def frame_rate
  @frame_rate
end

#frame_size ⇒ Object

Returns the value of attribute frame_size.



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# File 'lib/swf_ruby/swf/header.rb', line 9

def frame_size
  @frame_size
end

#length ⇒ Object

Returns the value of attribute length.



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# File 'lib/swf_ruby/swf/header.rb', line 12

def length
  @length
end

#version ⇒ Object

Returns the value of attribute version.



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# File 'lib/swf_ruby/swf/header.rb', line 7

def version
  @version
end

Class Method Details

.parse(swf) ⇒ Object 



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# File 'lib/swf_ruby/swf/header.rb', line 14

def self.parse(swf)
  header = Header.new
  # check if compressed
  if swf[1].chr == "W" and swf[2].chr == "S"
    if swf[0].chr == "F"
      header.compressed = false
    elsif swf[0].chr == "C"
      header.compressed = true
    end
  end
  # version
  header.version = swf[3].chr.unpack("C").first
  # file size
  header.file_length = swf[4, 4].unpack("V").first

  # Zlib inflate
  if header.compressed
    swf[8..-1] = Zlib::Inflate.inflate(swf[8..-1])
  end

  # frame size
  header.frame_size = Rectangle.new(swf[8..-1])
  # frame rate
  header.frame_rate = (swf[8+header.frame_size.length].chr.unpack("C").first).to_f / 0x100
  header.frame_rate += swf[9+header.frame_size.length].chr.unpack("C").first
  # frame count
  header.frame_count = swf[10+header.frame_size.length, 2].unpack("v").first
  # header length
  header.length = 12+header.frame_size.length

  [header, swf]
end