Class: BMFF::Box::Base

Inherits:
Object
  • Object
show all
Defined in:
lib/bmff/box/base.rb

Overview

vim: set expandtab tabstop=2 shiftwidth=2 softtabstop=2 autoindent:

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#io ⇒ Object

Returns the value of attribute io.



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# File 'lib/bmff/box/base.rb', line 5

def io
  @io
end

#largesize ⇒ Object

Returns the value of attribute largesize.



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# File 'lib/bmff/box/base.rb', line 5

def largesize
  @largesize
end

#offset ⇒ Object

Returns the value of attribute offset.



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# File 'lib/bmff/box/base.rb', line 5

def offset
  @offset
end

#parent ⇒ Object

Returns the value of attribute parent.



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# File 'lib/bmff/box/base.rb', line 5

def parent
  @parent
end

#size ⇒ Object

Returns the value of attribute size.



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# File 'lib/bmff/box/base.rb', line 5

def size
  @size
end

#type ⇒ Object

Returns the value of attribute type.



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# File 'lib/bmff/box/base.rb', line 5

def type
  @type
end

#usertype ⇒ Object

Returns the value of attribute usertype.



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# File 'lib/bmff/box/base.rb', line 5

def usertype
  @usertype
end

Class Method Details

.register_box(*boxtypes) ⇒ Object 



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# File 'lib/bmff/box/base.rb', line 8

def self.register_box(*boxtypes)
  boxtypes.each do |boxtype|
    BMFF::Box::Map.register_box(boxtype, self)
  end
end

Instance Method Details

#actual_size ⇒ Object 



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# File 'lib/bmff/box/base.rb', line 14

def actual_size
  return largesize if size == 1
  return nil if size == 0
  return size
end

#container? ⇒ Boolean

Returns:

  • (Boolean) 


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# File 'lib/bmff/box/base.rb', line 63

def container?
  false
end

#eob? ⇒ Boolean

end of box?

Returns:

  • (Boolean) 


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# File 'lib/bmff/box/base.rb', line 28

def eob?
  if actual_size
    return io.pos >= offset + actual_size
  else
    return io.eof?
  end
end

#parse ⇒ Object 



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# File 'lib/bmff/box/base.rb', line 44

def parse
  parse_data
  if actual_size
    if io.pos > offset + actual_size
      raise RangeError, "Given box size is smaller than expected."
    end
  end
  seek_to_end
end

#parse_data ⇒ Object 



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# File 'lib/bmff/box/base.rb', line 54

def parse_data
  if size == 1
    @largesize = io.get_uint64
  end
  if type == 'uuid'
    @usertype = io.get_uuid
  end
end

#remaining_size ⇒ Object 



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# File 'lib/bmff/box/base.rb', line 20

def remaining_size
  if actual_size
    return (offset + actual_size) - io.pos
  end
  nil
end

#seek_to_end ⇒ Object 



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# File 'lib/bmff/box/base.rb', line 36

def seek_to_end
  if actual_size
    io.pos = offset + actual_size
  else
    io.seek(0, IO::SEEK_END)
  end
end