Class: Burn::Fuel::Rom::ChannelStream

Inherits:
Object
  • Object
show all
Defined in:
lib/burn/fuel/rom/channel_stream.rb

Constant Summary collapse

TEMPO_BASE =

tempo 193 ~ 211 (18 levels, 202 is median) see: ja.wikipedia.org/wiki/%E6%BC%94%E5%A5%8F%E8%A8%98%E5%8F%B7

192
PRESTO = 
1 + TEMPO_BASE
ALLEGRO = 
2 + TEMPO_BASE
MODERATO = 
3 + TEMPO_BASE
ANDANTE = 
4 + TEMPO_BASE
ADAGIO = 
5 + TEMPO_BASE
LARGO = 
6 + TEMPO_BASE
BASS =

instrument number 64~126 (62steps) note no sound for 64, 65~72 seems working right now

65
PIANO = 
66
STRING = 
67
ARPEGGIO = 
68
STEP = 
69
BELL = 
70
ACOUSTIC = 
71
GUITAR = 
72
THEREMIN = 
73

Instance Method Summary collapse

Constructor Details

#initialize(index, instrument, tempo) ⇒ ChannelStream

Returns a new instance of ChannelStream.



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# File 'lib/burn/fuel/rom/channel_stream.rb', line 26

def initialize(index, instrument, tempo)
  @index = index
  
  @duration_list = [:half, :quarter, :eighth, :sixteenth]
  @duration_numeric_list = {2=>:half, 4=>:quarter, 8=>:eighth, 16=>:sixteenth}
  @duration_symbol_list = [:dotted, :triplet]
  @articulation_list = [:tenuto, :staccato, :accent]
  @instrument_list = [:piano, :bass]
  
  @notes = Array.new
  @notes << ChannelStream.const_get(tempo.upcase)
  @notes << ChannelStream.const_get(instrument.upcase)  
  
  @default_duration = :quarter
  @default_articulation = nil
  @default_pitch = :c0
  
  @output_buffer = Array.new
end

Dynamic Method Handling

This class handles dynamic methods through the method_missing method

#method_missing(method_symbol, *args, &block) ⇒ Object 



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# File 'lib/burn/fuel/rom/channel_stream.rb', line 58

def method_missing(method_symbol, *args, &block)
  case method_symbol
  when :segno then
    @output_buffer << __translate
    @output_buffer << "@chn#{@index.to_s}_segno:"
    @notes = Array.new
  when :dal_segno then
    @output_buffer << __translate
    @output_buffer << "	.byte $fe" # end of stream
    @output_buffer << "	.word @chn#{@index.to_s}_segno"
    @notes = Array.new
  else
    note = Note.new(@default_duration, method_symbol, @default_articulation)
    args.each{ |option|
      if @duration_numeric_list.include?(option) then
        note.duration = @duration_numeric_list[option]
      elsif @duration_list.include?(option) then
        note.duration = option
      elsif @articulation_list.include?(option) then 
        note.articulation = option
      elsif @duration_symbol_list.include?(option) then
        note.duration_symbol = option
      end
    }
    @notes.concat note.generate
  end
end

Instance Method Details

#default(*args) ⇒ Object 



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# File 'lib/burn/fuel/rom/channel_stream.rb', line 46

def default(*args)
  args.each{ |option|
    if @duration_numeric_list.include?(option) then
      @default_duration = @duration_numeric_list[option]
    elsif @duration_list.include?(option) then
      @default_duration = option
    elsif @articulation_list.include?(option) then 
      @default_articulation = option
    end
  }
end

#generate ⇒ Object 



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# File 'lib/burn/fuel/rom/channel_stream.rb', line 90

def generate
  if @notes.count>0 then
    @output_buffer << __translate
  end
  @output_buffer.join("\n")
  # "	.byte " + @notes.map{|p| "$%02x" % p}.join(",")
  # "	.byte $c1,$43,$1d,$80,$1f,$80,$21,$82,$1d,$80,$1d,$80,$1f,$92"
end

#load(&block) ⇒ Object 



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# File 'lib/burn/fuel/rom/channel_stream.rb', line 86

def load(&block)
  self.instance_eval &block
end