Class: Niki::Instrument

Inherits:
Object
  • Object
show all
Includes:
Chords
Defined in:
lib/niki/instrument.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from Chords

#silence

Constructor Details

#initialize(name, song, &block) ⇒ Instrument

Returns a new instance of Instrument.



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# File 'lib/niki/instrument.rb', line 7

def initialize(name, song, &block)
  @name = name
  @song = song
  @channel_number = nil
  @macros = {}

  self.instance_exec(&block)

  Part.send :include, self.to_module
end

Instance Attribute Details

#channel_number ⇒ Object (readonly)

Returns the value of attribute channel_number.



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# File 'lib/niki/instrument.rb', line 3

def channel_number
  @channel_number
end

#name ⇒ Object (readonly)

Returns the value of attribute name.



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# File 'lib/niki/instrument.rb', line 3

def name
  @name
end

Instance Method Details

#channel(number) ⇒ Object 



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# File 'lib/niki/instrument.rb', line 18

def channel(number)
  @channel_number = number - 1
end

#note ⇒ Object 



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# File 'lib/niki/instrument.rb', line 22

def note
  @macros
end

#to_module ⇒ Object 



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# File 'lib/niki/instrument.rb', line 26

def to_module
  instrument_name = @name
  macros = @macros

  Module.new do
    define_method instrument_name do |*args|
      note     = args.shift
      duration = args.shift || 1
      options  = args.shift || {}

      velocity = options[:v] || 100

      if note.is_a?(Hash) && note[:from]
        copy_from_part(note[:from], instrument_name)
        return
      end

      note = [note].flatten.map do |n|
        if n.is_a?(Fixnum)
          n
        else
          # Try to fetch the note from the symbol
          macros[n]
        end
      end

      note.push options[:base] if options[:base]

      register_note(instrument_name, note, duration, velocity)
    end
  end
end