Module: Musa::Datasets::GDV

Includes:
AbsD, Helper
Defined in:
lib/musa-dsl/datasets/gdv.rb

Constant Summary collapse

NaturalKeys = 
(NaturalKeys + [:grade, :sharps, :octave, :velocity, :silence]).freeze
VELOCITY_MAP =

TODO create a customizable MIDI velocity to score dynamics bidirectional conversor ppp = 16 … fff = 127 (-5 … 4) the standard used by Musescore 3 and others starts at ppp = 16

[1, 8, 16, 33, 49, 64, 80, 96, 112, 127].freeze

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from AbsD

#duration, #forward_duration, is_compatible?, #note_duration, to_AbsD

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/gdv.rb', line 17

def base_duration
  @base_duration
end

Instance Method Details

#to_gdvd(scale, previous: nil) ⇒ Object 



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# File 'lib/musa-dsl/datasets/gdv.rb', line 107

def to_gdvd(scale, previous: nil)
  gdvd = {}.extend GDVd
  gdvd.base_duration = @base_duration

  if previous

    if include?(:silence)
      gdvd[:abs_grade] = :silence

    elsif include?(:grade) && !previous.include?(:grade)
      gdvd[:abs_grade] = self[:grade]
      gdvd[:abs_sharps] = self[:sharps]

    elsif include?(:grade) && previous.include?(:grade)
      if self[:grade] != previous[:grade] ||
        (self[:sharps] || 0) != (previous[:sharps] || 0)

        gdvd[:delta_grade] =
            scale[self[:grade]].octave(self[:octave]).wide_grade -
            scale[previous[:grade]].octave(previous[:octave]).wide_grade

        gdvd[:delta_sharps] = (self[:sharps] || 0) - (previous[:sharps] || 0)
      end
    elsif include?(:sharps)
      gdvd[:delta_sharps] = self[:sharps] - (previous[:sharps] || 0)
    end

    if self[:duration] && previous[:duration] && (self[:duration] != previous[:duration])
      gdvd[:delta_duration] = (self[:duration] - previous[:duration])
    end

    if self[:velocity] && previous[:velocity] && (self[:velocity] != previous[:velocity])
      gdvd[:delta_velocity] = self[:velocity] - previous[:velocity]
    end
  else
    gdvd[:abs_grade] = self[:grade] if self[:grade]
    gdvd[:abs_duration] = self[:duration] if self[:duration]
    gdvd[:abs_velocity] = self[:velocity] if self[:velocity]
  end

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

  gdvd
end

#to_neuma ⇒ Object 



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# File 'lib/musa-dsl/datasets/gdv.rb', line 68

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

  attributes = []

  c = 0

  if include?(:silence)
    attributes[c] = :silence
  elsif include?(:grade)
    attributes[c] = self[:grade].to_s
    if include?(:sharps)
      if self[:sharps] > 0
        attributes[c] += '#' * self[:sharps]
      elsif self[:sharps] < 0
        attributes[c] += '_' * self[:sharps]
      end
    end
  end

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

  attributes[c += 1] = 'o' + self[:octave].to_s if self[:octave]
  attributes[c += 1] = (self[:duration] / @base_duration).to_s if self[:duration]
  attributes[c += 1] = velocity_of(self[:velocity]) if self[:velocity]

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

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

#to_pdv(scale) ⇒ Object 



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# File 'lib/musa-dsl/datasets/gdv.rb', line 23

def to_pdv(scale)
  pdv = {}.extend PDV
  pdv.base_duration = @base_duration

  if self[:grade]
    pdv[:pitch] = if self[:silence]
                    :silence
                  else
                    scale[self[:grade]].sharp(self[:sharps] || 0).octave(self[:octave] || 0).pitch
                  end
  end

  if self[:duration]
    pdv[:duration] = self[:duration]
  end

  if self[:note_duration]
    pdv[:note_duration] = self[:note_duration]
  end

  if self[:forward_duration]
    pdv[:forward_duration] = self[:forward_duration]
  end

  if self[:velocity]
    index = if (-5..4).cover?(self[:velocity])
              self[:velocity]
            else
              self[:velocity] < -5 ? -5 : 4
            end
    
    index_min = index.floor
    index_max = index.ceil

    velocity = VELOCITY_MAP[index_min + 5] +
      (VELOCITY_MAP[index_max + 5] - VELOCITY_MAP[index_min + 5]) * (self[:velocity] - index_min)

    pdv[:velocity] = velocity
  end

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

  pdv
end