Class: FLV::FLVTag

Inherits:
Object
  • Object
show all
Defined in:
lib/flv/tag.rb

Direct Known Subclasses

FLVAudioTag, FLVMetaTag, FLVVideoTag

Constant Summary collapse

AUDIO = 
8
VIDEO = 
9
META = 
18
UNDEFINED = 
0

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(stream = nil) ⇒ FLVTag

Returns a new instance of FLVTag.



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# File 'lib/flv/tag.rb', line 43

def initialize(stream = nil)
  @tag_type = UNDEFINED
  @byte_offset = nil
  
  unless stream.nil?
    data_size = stream.read__UI24
    @timestamp = stream.read__UI24
    stream.read__UI32
    @data = stream.read(data_size)
  else
    @timestamp = 0
    @data = ''
  end
  after_initialize(stream.nil?) if respond_to? :after_initialize
end

Instance Attribute Details

#byte_offset ⇒ Object

Returns the value of attribute byte_offset.



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# File 'lib/flv/tag.rb', line 39

def byte_offset
  @byte_offset
end

#tag_type ⇒ Object

Returns the value of attribute tag_type.



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# File 'lib/flv/tag.rb', line 39

def tag_type
  @tag_type
end

#timestamp ⇒ Object

Returns the value of attribute timestamp.



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# File 'lib/flv/tag.rb', line 39

def timestamp
  @timestamp
end

Class Method Details

.type2name(type) ⇒ Object 



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# File 'lib/flv/tag.rb', line 96

def self.type2name(type)
  case type
  when AUDIO
    'audio'
  when VIDEO
    'video'
  when META
    'meta'
  when UNDEFINED
    'undefined'
  else
    "unknown(#{type})"
  end
end

Instance Method Details

#data ⇒ Object 



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# File 'lib/flv/tag.rb', line 68

def data
  @data
end

#data_size ⇒ Object 



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# File 'lib/flv/tag.rb', line 72

def data_size
  data.length
end

#info ⇒ Object 



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# File 'lib/flv/tag.rb', line 84

def info
  "#{name}: timestamp #{timestamp}, size #{size}, data size #{data_size}"
end

#inspect ⇒ Object 



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# File 'lib/flv/tag.rb', line 88

def inspect
  out = ["tag: #{self.class}"]
  out << "timestamp: #{@timestamp}"
  out << "size: #{size}"
  out << "data_size: #{data_size}"
  out
end

#name ⇒ Object 



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# File 'lib/flv/tag.rb', line 64

def name
  'Unknown Tag'
end

#serialize(stream) ⇒ Object 



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# File 'lib/flv/tag.rb', line 76

def serialize(stream)
  stream.write__UI8 tag_type
  stream.write__UI24 data_size
  stream.write__UI24 timestamp
  stream.write__UI32 0
  stream.write__STRING data
end

#size ⇒ Object 



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# File 'lib/flv/tag.rb', line 59

def size
  # header(11) + body(data_size)
  11 + data_size
end