Class: Musa::Clock::InputMidiClock

Inherits:
Clock
  • Object
show all
Defined in:
lib/musa-dsl/transport/input-midi-clock.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods inherited from Clock

#on_change_position, #on_start, #on_stop, #running?

Constructor Details

#initialize(input = nil, logger: nil, do_log: nil) ⇒ InputMidiClock

Returns a new instance of InputMidiClock.



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# File 'lib/musa-dsl/transport/input-midi-clock.rb', line 8

def initialize(input = nil, logger: nil, do_log: nil)
  do_log ||= false

  super()

  @logger = logger

  self.input = input

  if logger
    @logger = logger
  else
    @logger = Musa::Logger::Logger.new
    @logger.debug! if do_log
  end

  @midi_parser = MIDIParser.new
end

Instance Attribute Details

#input ⇒ Object

Returns the value of attribute input.



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# File 'lib/musa-dsl/transport/input-midi-clock.rb', line 27

def input
  @input
end

Instance Method Details

#run ⇒ Object 



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# File 'lib/musa-dsl/transport/input-midi-clock.rb', line 34

def run
  @run = true

  while @run
    if @input
      raw_messages = @input.gets
    else
      @logger.warn('InputMidiClock') { 'Waiting for clock input MIDI port' }

      @waiting_for_input = Thread.current
      sleep
      @waiting_for_input = nil

      if @input
        @logger.info('InputMidiClock') { "Assigned clock input MIDI port '#{@input.name}'" }
      else
        @logger.warn('InputMidiClock') { 'Clock input MIDI port not found' }
      end
    end

    messages = []
    stop_index = nil

    raw_messages&.each do |message|
      mm = @midi_parser.parse message[:data]

      if mm
        if mm.is_a? Array
          mm.each do |m|
            stop_index = messages.size if m.name == 'Stop' && !stop_index
            messages << m
          end
        else
          stop_index = messages.size if mm.name == 'Stop' && !stop_index
          messages << mm
        end
      end
    end

    size = messages.size
    index = 0
    while index < size
      if index == stop_index && size >= index + 3 &&
          messages[index + 1].name == 'Song Position Pointer' &&
          messages[index + 2].name == 'Continue'

        @logger.debug('InputMidiClock') { 'processing Stop + Song Position Pointer + Continue...' }

        process_start unless @started

        process_message messages[index + 1] do
          yield if block_given?
        end

        index += 2

        @logger.debug('InputMidiClock') { 'processing Stop + Song Position Pointer + Continue... done' }

      else
        process_message messages[index] do
          yield if block_given?
        end
      end

      index += 1
    end

    Thread.pass
  end
end

#terminate ⇒ Object 



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# File 'lib/musa-dsl/transport/input-midi-clock.rb', line 105

def terminate
  @run = false
end