Module: Musa::Datasets::GDVd

Includes:
DeltaD, DeltaI, Helper
Defined in:
lib/musa-dsl/datasets/gdvd.rb

Constant Summary collapse

NaturalKeys = 
(NaturalKeys +
                    [:abs_grade, :abs_sharps, :abs_octave,
:delta_grade, :delta_sharps, :delta_interval_sign, :delta_interval, :delta_octave,
:abs_velocity, :delta_velocity,
:modifiers]).freeze

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from E

#valid?, #validate!

Instance Attribute Details

#base_duration ⇒ Object

Returns the value of attribute base_duration.



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# File 'lib/musa-dsl/datasets/gdvd.rb', line 22

def base_duration
  @base_duration
end

Instance Method Details

#normalize_to_scale(scale, grade, sharps) ⇒ Object 



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# File 'lib/musa-dsl/datasets/gdvd.rb', line 112

def normalize_to_scale(scale, grade, sharps)
  note = scale[grade].sharp(sharps)
  background = note.background_note

  if background
    return background.wide_grade, note.background_sharps
  else
    return note.wide_grade, 0
  end
end

#to_gdv(scale, previous:) ⇒ Object 



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# File 'lib/musa-dsl/datasets/gdvd.rb', line 32

def to_gdv(scale, previous:)
  r = previous.clone.delete_if {|k,_| !GDV::NaturalKeys.include?(k)}.extend GDV

  r.base_duration = @base_duration

  if include?(:abs_grade)
    if self[:abs_grade] == :silence
      r[:silence] = true
    else
      r.delete :silence
      r.delete :sharps

      r[:grade] = scale[self[:abs_grade]].wide_grade
      r[:sharps] = self[:abs_sharps] if include?(:abs_sharps)
    end

  elsif include?(:delta_grade)
    r.delete :silence

    r[:grade], r[:sharps] =
        normalize_to_scale(scale,
                           scale[r[:grade]].wide_grade + self[:delta_grade],
                           (r[:sharps] || 0) + (self[:delta_sharps] || 0))

    r.delete :sharps if r[:sharps].zero?

  elsif include?(:delta_interval)
    r.delete :silence

    sign = self[:delta_interval_sign] || 1

    r[:grade], r[:sharps] =
        normalize_to_scale scale,
                           scale[r[:grade]].wide_grade,
                           sign * scale.kind.tuning.scale_system.intervals[self[:delta_interval]]

    r.delete :sharps if r[:sharps].zero?

  elsif include?(:delta_sharps)
    r.delete :silence

    r[:grade], r[:sharps] =
        normalize_to_scale scale,
                           scale[r[:grade]].wide_grade,
                           (r[:sharps] || 0) + self[:delta_sharps]

    r.delete :sharps if r[:sharps].zero?
  end

  if include?(:abs_octave)
    r[:octave] = self[:abs_octave]
  elsif include?(:delta_octave)
    r[:octave] += self[:delta_octave]
  end

  if include?(:abs_duration)
    r[:duration] = self[:abs_duration]
  elsif include?(:delta_duration)
    r[:duration] += self[:delta_duration]
  elsif include?(:factor_duration)
    r[:duration] *= self[:factor_duration]
  end

  if include?(:abs_velocity)
    r[:velocity] = self[:abs_velocity]
  elsif include?(:delta_velocity)
    r[:velocity] += self[:delta_velocity]
  end

  if include?(:modifiers)
    self[:modifiers].each_pair do |k, v|
      r[k] = v
    end
  end

  (keys - NaturalKeys).each { |k| r[k] = self[k] }

  r
end

#to_neuma ⇒ Object 



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# File 'lib/musa-dsl/datasets/gdvd.rb', line 123

def to_neuma
  @base_duration ||= Rational(1,4)

  attributes = []

  c = 0

  if include?(:abs_grade)
    attributes[c] = self[:abs_grade].to_s

  elsif include?(:delta_grade)
    attributes[c] = positive_sign_of(self[:delta_grade]) + self[:delta_grade].to_s unless self[:delta_grade].zero?

  elsif include?(:delta_interval)

    attributes[c] = self[:delta_interval_sign] if include?(:delta_interval_sign)
    attributes[c] ||= ''
    attributes[c] += self[:delta_interval].to_s
  end

  if include?(:delta_sharps) && !self[:delta_sharps].zero?
    char = self[:delta_sharps] > 0 ? '#' : '_'
    sign = attributes[c].nil? ? positive_sign_of(self[:delta_sharps]) : ''

    attributes[c] ||= ''
    attributes[c] += sign + char * self[:delta_sharps].abs
  end

  attributes[c] = '.' if attributes[c].nil? || attributes[c].empty?

  if include?(:abs_octave)
    attributes[c += 1] = 'o' + self[:abs_octave].to_s
  elsif include?(:delta_octave)
    attributes[c += 1] = sign_of(self[:delta_octave]) + 'o' + self[:delta_octave].abs.to_s if self[:delta_octave] != 0
  end

  if include?(:abs_duration)
    attributes[c += 1] = (self[:abs_duration] / @base_duration).to_s
  elsif include?(:delta_duration)
    attributes[c += 1] = positive_sign_of(self[:delta_duration]) + (self[:delta_duration] / @base_duration).to_s
  elsif include?(:factor_duration)
    attributes[c += 1] = '*' + self[:factor_duration].to_s
  end

  if include?(:abs_velocity)
    attributes[c += 1] = velocity_of(self[:abs_velocity])
  elsif include?(:delta_velocity)
    attributes[c += 1] = sign_of(self[:delta_velocity]) + 'f' * self[:delta_velocity].abs
  end

  (keys - NaturalKeys).each do |k|
    attributes[c += 1] = modificator_string(k, self[k])
  end

  '(' + attributes.join(' ') + ')'
end