Class: Brevity::ScoreMaker

Inherits:
Object
  • Object
show all
Includes:
Commands
Defined in:
lib/brevity/score_maker.rb

Constant Summary

Constants included from Commands

Commands::DYNAMIC_PARSER, Commands::ENV_EXPRS, Commands::ENV_METER_CHANGES, Commands::ENV_PARTS, Commands::ENV_START_METER, Commands::ENV_START_TEMPO, Commands::ENV_TEMPO_CHANGES, Commands::EXPR_PARSER, Commands::LABEL_PARSER

Instance Method Summary collapse

Methods included from Commands

#class_const, #expr, #meter, #part, #tempo

Instance Method Details

#make_score ⇒ Object 



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# File 'lib/brevity/score_maker.rb', line 26

def make_score
  start_tempo = @env[ENV_START_TEMPO]
  start_meter = @env[ENV_START_METER]\
                
  unless start_tempo.is_a? Numeric
    raise MissingStartTempoError
  end
  
  unless start_meter.is_a? Music::Transcription::Meter
    raise MissingStartMeterError
  end
  
  tcs = @env[ENV_TEMPO_CHANGES]
  mcs = @env[ENV_METER_CHANGES]
  parts = @env[ENV_PARTS]
  
  ## now that start tempo is established, find tempo changes
  ## whose value is not a Tempo object and convert them
  #prev_tempo = start_tempo
  #tcs.keys.sort.each do |offset|
  #  tc = tcs[offset]
  #  tempo = tc.value
  #  if tempo.beat_duration.nil?
  #    tc.value = Music::Transcription::Tempo.new(
  #      tempo.beats_per_minute,prev_tempo.beat_duration)
  #  end
  #  prev_tempo = tc.value
  #end
  
  return Music::Transcription::Score.new(
    start_meter,
    start_tempo,
    parts: parts,
    tempo_changes: tcs,
    meter_changes: mcs
  )
end

#process_nodes(cmd_nodes) ⇒ Object 



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# File 'lib/brevity/score_maker.rb', line 17

def process_nodes cmd_nodes
  self.reset_env
  
  cmd_nodes.each do |cmd_node|
    cmd_method = cmd_node.name.to_sym
    self.send(cmd_method,*cmd_node.args)
  end
end

#reset_env ⇒ Object 



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# File 'lib/brevity/score_maker.rb', line 8

def reset_env
  @env = {}
  @env[ENV_START_TEMPO] = nil
  @env[ENV_TEMPO_CHANGES] = {}
  @env[ENV_METER_CHANGES] = {}
  @env[ENV_EXPRS] = {}
  @env[ENV_PARTS] = {}
end