Class: Musicality::NoteSequenceExtractor

Inherits:
Object
  • Object
show all
Defined in:
lib/musicality/performance/conversion/note_sequence_extractor.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(notes) ⇒ NoteSequenceExtractor

Returns a new instance of NoteSequenceExtractor.



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# File 'lib/musicality/performance/conversion/note_sequence_extractor.rb', line 5

def initialize notes
  @notes = notes.map {|n| n.clone }
  mark_slurring
  remove_bad_links
  calculate_offsets

  # now, ready to extract sequences!
end

Instance Attribute Details

#notes ⇒ Object (readonly)

Returns the value of attribute notes.



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# File 'lib/musicality/performance/conversion/note_sequence_extractor.rb', line 4

def notes
  @notes
end

Instance Method Details

#extract_sequences(cents_per_step = 10) ⇒ Object 



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# File 'lib/musicality/performance/conversion/note_sequence_extractor.rb', line 14

def extract_sequences cents_per_step = 10
  completed_seqs = []
  continuing_sequences = {}

  @notes.each_with_index do |note, idx|
    offset = @offsets[idx]
    duration = note.duration
    attack = NoteSequenceExtractor.note_attack(note.articulation)
    separation = NoteSequenceExtractor.note_separation(note.articulation, @slurring_flags[idx])

    next_note = (idx == (@notes.size-1)) ? Note.quarter : @notes[idx+1]
    continuation_map = NoteSequenceExtractor.continuation_map(note, next_note, separation)

    new_continuing_sequences = {}

    note.pitches.each do |p|
      seq = if continuing_sequences.has_key?(p)
        continuing_sequences[p].elements += note_pitch_elements(note, p, Attack::NONE, cents_per_step)
        continuing_sequences.delete(p)
      else
        NoteSequence.new(offset, separation, note_pitch_elements(note, p, attack, cents_per_step))
      end

      if continuation_map.include?(p)
        new_continuing_sequences[continuation_map[p]] = seq
      else
        completed_seqs.push seq
      end
    end

    if continuing_sequences.any?
      require 'pry'
      binding.pry
      # raise "Should be no previous continuing sequences remaining"
    end
    continuing_sequences = new_continuing_sequences
  end

  raise "Should be no previous continuing sequences remaining" if continuing_sequences.any?

  completed_seqs.each {|seq| seq.simplify! }
  return completed_seqs
end