Module: FLV::Packing

Defined in:: lib/flvedit/flv/packing.rb

Overview

FLV files can contain structured data. This modules makes it easy to (un)pack that data. The packing option flv_value can (un)pack any kind of variable. It corresponds to SCRIPTDATAVALUE in the official FLV file format spec. Implementation Note: flv_value is actually simply a wrapper that will (un)pack the type of variable; the actual data is (un)packed with the format flv, which is independently defined for each type

Defined Under Namespace

Classes: EndOfList

Constant Summary collapse

TYPE_TO_CLASS = Top-level :flv_value filter:

Hash.new do |h, type|
  #EndOfList
  raise IOError, "Invalid type for a flash variable. #{type.inspect} is not in #{h.keys}" #todo: handle error for corrupted da
end.merge!(
   0 => Numeric   ,
   1 => TrueClass , # There really should be a Boolean class!
   2 => String    ,
   3 => Hash      ,
   8 => [Hash, :flv_with_size],
   9 => EndOfList ,
  10 => Array     ,
  11 => Time      ,
  nil => NilClass
).freeze

CLASS_TO_TYPE =

Hash.new do |h, klass|
  # Makes it such that CLASS_TO_TYPE[Fixnum] = CLASS_TO_TYPE[Integer], etc.
  h[klass] = h[klass.superclass]
end.merge!(TYPE_TO_CLASS.invert).merge!(
  Event => TYPE_TO_CLASS.key([Hash, :flv_with_size]), # Write Events as hashes with size
  FalseClass => TYPE_TO_CLASS.key(TrueClass)
)