Module: MediaInfoNative::AttrReaders

Included in:
BaseStream
Defined in:
lib/mediainfo-native/attr_readers.rb

Instance Method Summary collapse

Instance Method Details

#mediainfo_attr_reader(attribute, mediainfo_key) ⇒ Object 



12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
 
# File 'lib/mediainfo-native/attr_readers.rb', line 12

def mediainfo_attr_reader(attribute, mediainfo_key)     
  attribute_before_type_cast = "#{attribute}_before_type_cast"
  
  define_method attribute_before_type_cast do
    instance_variable_get("@#{attribute_before_type_cast}") || instance_variable_set("@#{attribute_before_type_cast}", lookup(mediainfo_key))
  end
  
  define_method attribute do
    if v = instance_variable_get("@#{attribute}")
      v
    else
      v = send(attribute_before_type_cast)
      v = yield v if v and block_given?
      
      instance_variable_set("@#{attribute}", v)
    end
  end

  supported_attribute(attribute)
end

#mediainfo_date_reader(*a) ⇒ Object 



67
68
69
70
71
72
73
74
75
76
77
78
 
# File 'lib/mediainfo-native/attr_readers.rb', line 67

def mediainfo_date_reader(*a)
  # Mediainfo can return wrong timestamps, so we have to correct them before
  # we let ruby try to parse.
  # Also we now catch exceptions.
  mediainfo_attr_reader(*a) do |v|
    begin
      Time.parse(v.gsub('-00', '-01'))
    rescue
      Time.now
    end
  end
end

#mediainfo_duration_reader(*a) ⇒ Object 



33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
 
# File 'lib/mediainfo-native/attr_readers.rb', line 33

def mediainfo_duration_reader(*a)
  mediainfo_attr_reader *a do |v|
    case
    when v.include?(":")
      # If it is like 00:20:30.600
      splitted = v.split(/:|\./)
      (splitted[0].to_i * 60 * 60 * 1000) + 
        (splitted[1].to_i * 60 * 1000) + 
        (splitted[2].to_i * 1000) +
        (splitted[3].to_i)
    when v.include?('ms')
      # If it is like '20mn 30s 600ms'
      t = 0
      v.split(/\s+/).each do |tf|
        case tf
        # TODO: Haven't actually seen how they represent hours yet 
        # but hopefully this is ok.. :         when /\d+h/  then t += tf.to_i * 60 * 60 * 1000
        when /\d+mn/ then t += tf.to_i * 60 * 1000
        when /\d+ms/ then t += tf.to_i
        when /\d+s/  then t += tf.to_i * 1000
        end
      end
      t
    when /\A\d+\z/ =~ v
      v.to_i
    when /\A\d+\.\d+\z/ =~ v
      v.to_f.round
    else
      raise "unexpected time fragment! please report bug!"
    end
  end
end

#mediainfo_int_reader(*a) ⇒ Object 



80
81
82
 
# File 'lib/mediainfo-native/attr_readers.rb', line 80

def mediainfo_int_reader(*a)
  mediainfo_attr_reader(*a) { |v| v.gsub(/\D+/, "").to_i }
end

#supported_attribute(attribute) ⇒ Object 



3
4
5
6
 
# File 'lib/mediainfo-native/attr_readers.rb', line 3

def supported_attribute(attribute)
  @supported_attributes ||= []
  @supported_attributes << attribute
end

#supported_attributes ⇒ Object 



8
9
10
 
# File 'lib/mediainfo-native/attr_readers.rb', line 8

def supported_attributes
  @supported_attributes || []
end