Class: Deftones::Source::ToneOscillatorNode

Inherits:
Oscillator show all
Defined in:
lib/deftones/source/tone_oscillator_node.rb

Constant Summary

Constants inherited from Oscillator

Oscillator::GENERATORS, Oscillator::TYPES

Instance Attribute Summary collapse

Attributes inherited from Oscillator

#frequency, #type

Attributes inherited from Core::Source

#mute, #onstop, #volume

Instance Method Summary collapse

Methods inherited from Oscillator

bandlimited_sawtooth, bandlimited_square, bandlimited_triangle, naive_triangle, #normalize_type, #phase, #phase=, poly_blep, poly_blep_end, poly_blep_start, sample, #sample_for

Methods inherited from Core::Source

#active_at?, #apply_volume!, #clear_transport_event, #dispose, #mute?, #notify_stop_in_window, #number_of_inputs, #render, #render_block, #resolve_time, #resolve_transport_time, #restart, #schedule_transport_event, #source_type, #stop, #sync, #synced?, #unsync, #uses_legacy_render_for_block?

Constructor Details

#initialize(detune: 0.0, context: Deftones.context, **options) ⇒ ToneOscillatorNode

Returns a new instance of ToneOscillatorNode.



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# File 'lib/deftones/source/tone_oscillator_node.rb', line 9

def initialize(detune: 0.0, context: Deftones.context, **options)
  super(context: context, **options)
  @detune = Core::Signal.new(value: detune, units: :number, context: context)
  @onended = nil
  @ended_notified = false
end

Instance Attribute Details

#detune ⇒ Object

Returns the value of attribute detune.



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# File 'lib/deftones/source/tone_oscillator_node.rb', line 7

def detune
  @detune
end

#onended ⇒ Object

Returns the value of attribute onended.



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# File 'lib/deftones/source/tone_oscillator_node.rb', line 6

def onended
  @onended
end

Instance Method Details

#cancel_stop ⇒ Object 



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# File 'lib/deftones/source/tone_oscillator_node.rb', line 24

def cancel_stop
  @stop_time = nil
  self
end

#detune_ratio(cents) ⇒ Object (private) 



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# File 'lib/deftones/source/tone_oscillator_node.rb', line 54

def detune_ratio(cents)
  2.0**(cents.to_f / 1200.0)
end

#notify_ended(current_time) ⇒ Object (private) 



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# File 'lib/deftones/source/tone_oscillator_node.rb', line 58

def notify_ended(current_time)
  return if @ended_notified

  @ended_notified = true
  @onended&.call(current_time)
end

#process(_input_buffer, num_frames, start_frame, _cache) ⇒ Object 



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# File 'lib/deftones/source/tone_oscillator_node.rb', line 34

def process(_input_buffer, num_frames, start_frame, _cache)
  oscillator_type = send(:normalize_type, @type)
  frequencies = @frequency.process(num_frames, start_frame)
  detunes = @detune.process(num_frames, start_frame)

  Array.new(num_frames) do |index|
    current_time = (start_frame + index).to_f / context.sample_rate
    notify_ended(current_time) if @stop_time && current_time >= @stop_time
    next 0.0 unless active_at?(current_time)

    frequency = frequencies[index] * detune_ratio(detunes[index])
    phase_increment = frequency / context.sample_rate
    sample = sample_for(oscillator_type, @phase, phase_increment)
    @phase = (@phase + phase_increment) % 1.0
    sample
  end
end

#start(time = nil) ⇒ Object 



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# File 'lib/deftones/source/tone_oscillator_node.rb', line 29

def start(time = nil)
  @ended_notified = false
  super
end

#state(time = context.current_time) ⇒ Object 



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# File 'lib/deftones/source/tone_oscillator_node.rb', line 20

def state(time = context.current_time)
  active_at?(resolve_time(time)) ? :started : :stopped
end