Class: GBTiles::GBT::Import::MODFile

Inherits:
Object
  • Object
show all
Defined in:
lib/gbtiles/gbt/import/mod_file.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ MODFile

Returns a new instance of MODFile.



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# File 'lib/gbtiles/gbt/import/mod_file.rb', line 14

def initialize
  @mod_data = GBTiles::GBT::MODData::MODData.new
end

Instance Attribute Details

#mod_data ⇒ Object

Returns the value of attribute mod_data.



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# File 'lib/gbtiles/gbt/import/mod_file.rb', line 12

def mod_data
  @mod_data
end

Class Method Details

.open(file) ⇒ Object 



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# File 'lib/gbtiles/gbt/import/mod_file.rb', line 18

def self.open file
  import = GBTiles::GBT::Import::MODFile.new

  import.mod_data.name = GBTiles::DataType.string(file.read(20))

  for i in 0..30
    sample_data = file.read(30)

    sample = GBTiles::GBT::MODData::Sample.new
    sample.name = GBTiles::DataType.string!(sample_data, 22)
    sample.length = GBTiles::DataType.bword!(sample_data)
    sample.finetune = GBTiles::DataType.byte!(sample_data)
    sample.volume = GBTiles::DataType.byte!(sample_data)
    sample.repeat_point = GBTiles::DataType.bword!(sample_data)
    sample.repeat_length = GBTiles::DataType.bword!(sample_data)

    import.mod_data.samples << sample
  end

  import.mod_data.song_length = GBTiles::DataType.byte(file.read(1))
  file.read(1) # unused

  for i in 0..127
    import.mod_data.pattern_table << GBTiles::DataType.byte(file.read(1))
  end

  import.mod_data.identifier = GBTiles::DataType.string(file.read(4))

  for i in 0..63
    pattern = GBTiles::GBT::MODData::Pattern.new

    for j in 0..63
      pattern.rows << file.read(16)
    end

    import.mod_data.patterns << pattern
  end

  if import.mod_data.identifier != "M.K." then
    raise IOError, "Invalid identifier in .MOD: expected `M.K.` got `#{import.mod_data.identifier}`"
  end

  import
end