Class: Deftones::Effects::PingPongDelay

Inherits:
FeedbackDelay show all
Defined in:
lib/deftones/effect/ping_pong_delay.rb

Instance Attribute Summary

Attributes inherited from FeedbackDelay

#delay_time, #feedback

Attributes inherited from Core::Effect

#wet

Instance Method Summary collapse

Methods inherited from FeedbackDelay

#ensure_delay_line, #process_effect

Methods inherited from Core::Effect

#multichannel_process?, #normalize_channel_output, #process, #process_effect

Constructor Details

#initialize(max_delay: 2.0, **options) ⇒ PingPongDelay

Returns a new instance of PingPongDelay.



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# File 'lib/deftones/effect/ping_pong_delay.rb', line 6

def initialize(max_delay: 2.0, **options)
  super(max_delay: max_delay, **options)
  @left_delay_line = DSP::DelayLine.new(@max_delay_samples)
  @right_delay_line = DSP::DelayLine.new(@max_delay_samples)
end

Instance Method Details

#process_effect_block(input_block, num_frames, start_frame, _cache) ⇒ Object (private) 



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# File 'lib/deftones/effect/ping_pong_delay.rb', line 14

def process_effect_block(input_block, num_frames, start_frame, _cache)
  delays = @delay_time.process(num_frames, start_frame)
  feedbacks = @feedback.process(num_frames, start_frame)
  source = input_block.fit_channels(2)
  left = Array.new(num_frames, 0.0)
  right = Array.new(num_frames, 0.0)

  num_frames.times do |index|
    delay_samples = delays[index] * context.sample_rate
    feedback = feedbacks[index].to_f.clamp(-0.999, 0.999)
    left_tap = @left_delay_line.read(delay_samples)
    right_tap = @right_delay_line.read(delay_samples)
    input_left = input_block.channels == 1 ? input_block.mono[index] : source.channel_data[0][index]
    input_right = input_block.channels == 1 ? 0.0 : source.channel_data[1][index]

    @left_delay_line.write(input_left + (right_tap * feedback))
    @right_delay_line.write(input_right + (left_tap * feedback))

    left[index] = left_tap
    right[index] = right_tap
  end

  Core::AudioBlock.from_channel_data([left, right])
end