Class: Ruck::MIDI::MIDIOutput

Inherits:
Object
  • Object
show all
Defined in:
lib/ruck/midi/midi.rb

Instance Method Summary collapse

Constructor Details

#initialize(real_time, save_filename = nil, num_tracks = 1) ⇒ MIDIOutput

Returns a new instance of MIDIOutput.



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# File 'lib/ruck/midi/midi.rb', line 41

def initialize(real_time, save_filename = nil, num_tracks = 1)
  if save_filename
    @filename = save_filename
    @sequence = ::MIDI::Sequence.new
    @tracks = (1..num_tracks).map { ::MIDI::Track.new(@sequence) }
    @track_deltas = @tracks.map { 0 }

    @tracks.each do |track|
      @sequence.tracks << track
      #track.events << ::MIDI::Tempo.new(::MIDI::Tempo.bpm_to_mpq(120))
    end
  end
    
  if real_time
    @player = MIDIator::Interface.new
    @player.use :dls_synth
    @player.instruct_user!
  end
end

Instance Method Details

#bpm ⇒ Object 



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# File 'lib/ruck/midi/midi.rb', line 65

def bpm
  @sequence.bpm
end

#control_change(controller, value, channel = 0, track = 0) ⇒ Object 



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# File 'lib/ruck/midi/midi.rb', line 99

def control_change(controller, value, channel = 0, track = 0)
  if @sequence
    @tracks[track].events << ::MIDI::Controller.new(channel, controller, value)
  end
  
  if @player
    @player.driver.control_change(controller, channel, value)
  end
end

#note_off(note, channel = 0, track = 0) ⇒ Object 



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# File 'lib/ruck/midi/midi.rb', line 88

def note_off(note, channel = 0, track = 0)
  if @sequence
    @tracks[track].events << ::MIDI::NoteOffEvent.new(channel, note, 0, @track_deltas[track].to_i)
    @track_deltas[track] = 0
  end
  
  if @player
    @player.driver.note_on(note, channel, 0)
  end
end

#note_on(note, velocity = 127, channel = 0, track = 0) ⇒ Object 



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# File 'lib/ruck/midi/midi.rb', line 77

def note_on(note, velocity = 127, channel = 0, track = 0)
  if @sequence
    @tracks[track].events << ::MIDI::NoteOnEvent.new(channel, note, velocity, @track_deltas[track].to_i)
    @track_deltas[track] = 0
  end
  
  if @player
    @player.driver.note_on(note, channel, velocity)
  end
end

#ppqn ⇒ Object 



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# File 'lib/ruck/midi/midi.rb', line 61

def ppqn
  @sequence.ppqn
end

#program_change(program, channel = 0, track = 0) ⇒ Object 



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# File 'lib/ruck/midi/midi.rb', line 109

def program_change(program, channel = 0, track = 0)
  if @sequence
    @tracks[track].events << ::MIDI::ProgramChange.new(channel, program)
  end
  
  if @player
    @player.driver.program_change(channel, program)
  end
end

#save ⇒ Object 



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# File 'lib/ruck/midi/midi.rb', line 119

def save
  return if @saved
  return unless @sequence
    
  @saved = true
    
  File.open(@filename, "wb") do |file|
    @sequence.write(file)
  end
end

#tick(delta) ⇒ Object 



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# File 'lib/ruck/midi/midi.rb', line 69

def tick(delta)
  if @sequence
    @track_deltas.each_with_index do |track_delta, i|
      @track_deltas[i] = track_delta + delta
    end
  end
end