Class: Juicy::Track

Inherits:
Object
  • Object
show all
Defined in:
lib/juicy/track.rb

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(init_time, notes, tempo) ⇒ Track

Returns a new instance of Track.



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# File 'lib/juicy/track.rb', line 8

def initialize(init_time, notes, tempo)

  @start_time = init_time
  @notes = notes
  @tempo = tempo

end

Instance Attribute Details

#notes ⇒ Object

Returns the value of attribute notes.



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# File 'lib/juicy/track.rb', line 6

def notes
  @notes
end

Class Method Details

.play_concurrently(tracks, tempo) ⇒ Object 



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# File 'lib/juicy/track.rb', line 118

def self.play_concurrently(tracks, tempo)
  @song_start_time = Time.now
  threads = []
  # iterate over each track over and over again, preparing notes in the current beat
  # in each iteration, store the notes you've prepared into an array and store that
  # array into the prepared_notes array which the playing thread will play notes from
  # when it has enough to play.
  # A track is an array of playable musical objects.  for now, these are individual
  # notes or chords.  a chord is an array of individual notes
  #
  prepared_beats = []
  out_of_notes_to_prepare = false
  threads << Thread.new do
    Thread.current[:name] = "prepare beats thread"
    current_beat = 1
    last_beat = 1
    tracks.each do |track|
      track.notes.each do |note|
        last_beat = note.occupying_beat if note.occupying_beat > last_beat
      end
    end
    until current_beat > last_beat
      if prepared_beats.size <= 20
        this_beats_notes = []
        tracks.each do |track|
          while !track.notes[0].nil? && track.notes[0].plays_during?(current_beat)
            playable_thing = track.notes.shift
            if playable_thing.kind_of?(Note)
              this_beats_notes << playable_thing.prepare(duration: playable_thing.duration_in_milliseconds(tempo))
            elsif playable_thing.kind_of?(Chord)
              playable_thing.notes.each do |note|
                this_beats_notes << note.prepare(duration: note.duration_in_milliseconds(tempo))
              end
            end
          end
        end
        prepared_beats << this_beats_notes
        current_beat += 1
      end
      Thread.pass
    end
    out_of_notes_to_prepare = true
  end

  threads << Thread.new do
    Thread.current[:name] = "play prepared beats thread"
    # when prepared_beats has at least a few beats to play (a measure's worth?)
    # "start" the song by iterating through each element, waking up each note
    # and then waiting the remainder of a beat's worth of milliseconds until the
    # next beat
    until (prepared_beats.size >= 2) || out_of_notes_to_prepare
      sleep 0.01
    end
    last_note = Thread.new {}
    time = Time.now
    until prepared_beats.empty? && out_of_notes_to_prepare
      time = Time.now
      beat = prepared_beats.shift
      beat.each do |note|
        last_note = note.play_prepared
      end
      sleep rand(100..300)/1000.0
      sleep_amount = Duration.duration_of_quarter_note_in_milliseconds(tempo)/1000.0 - (Time.now - time)
      puts sleep_amount
      sleep sleep_amount unless sleep_amount < 0
    end
    last_note.join
  end
  
  #threads.each {|t| puts t[:name] }
  threads.each {|t| t.join}
end

.tracks_is_empty(tracks) ⇒ Object 



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# File 'lib/juicy/track.rb', line 106

def self.tracks_is_empty(tracks)
  empty = true
  tracks.each do |track|
    #puts track.object_id
    puts track.notes.inspect
    unless track.notes.empty?
      empty = false
    end
  end
  empty
end

Instance Method Details

#play ⇒ Object 



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# File 'lib/juicy/track.rb', line 16

def play

  # prepare notes ahead of time, and play them at a specified time.
  # each note must be prepared separately in it's own thread.
  # only 20 threads are allowed to be alive at a time in a current track, and each track is preparing its notes seperately
  # th = []
  # while(notes_left_to_prepare)
  #   if (th.count {|t| t.alive? }) <= 20
  #     note = notes_left_to_prepare.shift
  #     th << Thread.new do
  #       note.prepare
  #       sleep_amount = when_the_note_should_be_played - how_far_into_the_song_you_are
  #       unless sleep_amount < 0
  #         sleep sleep_amount
  #       end
  #       note.play_prepared
  #     end
  #   end
  # end
  # th.each {|t| t.join}

  notes = []
  if @notes[0].kind_of? Chord
    #notes << Thread.new { @notes.each { |chord| 4.times {chord.play} } }
    chords_left_to_prepare = @notes.dup
    @sum_of_queued_chord_durations = 0
    until chords_left_to_prepare.size == 1
      if (notes.count {|t| t.alive?} <= 20)
        notes << Thread.new do
          chord = chords_left_to_prepare.shift
          puts "#{chord}: #{chord.duration}"
          chord.sum_of_queued_chord_durations = @sum_of_queued_chord_durations
          @sum_of_queued_chord_durations += chord.duration_in_milliseconds(@tempo)
          chord.initial_play_time = @start_time + chord.sum_of_queued_chord_durations
          chord.how_far_into_the_song_you_are = how_far_into_the_song_you_are
          chord.prepare(duration: chord.duration_in_milliseconds(@tempo))
          sleep_amount = (chord.initial_play_time - chord.how_far_into_the_song_you_are)/1000.0
          unless sleep_amount < 0
            sleep sleep_amount
          end
          Thread.pass
          chord.play_prepared.join
          #puts "tehe"
          
          
        end
      end
      Thread.pass
    end
    
  elsif @notes[0].kind_of? Note
  
    # @notes.each do |note|
      # note.play
    # end
    notes_left_to_prepare = @notes.dup
    @sum_of_queued_note_durations = 0
    until notes_left_to_prepare.size == 1
      #puts notes_left_to_prepare.size
      if (notes.count {|t| t.alive? }) <= 20
        #Thread.pass
        notes << Thread.new do
          note = notes_left_to_prepare.shift
          puts "#{note}: #{note.duration}"
          note.sum_of_queued_note_durations = @sum_of_queued_note_durations
          @sum_of_queued_note_durations += note.duration_in_milliseconds(@tempo)
          #puts @sum_of_queued_note_durations
          note.initial_play_time = @start_time + note.sum_of_queued_note_durations
          #puts "note.initial_play_time: #{note.initial_play_time}"
          note.how_far_into_the_song_you_are = how_far_into_the_song_you_are
          #puts "note.how_far_into_the_song_you_are: #{note.how_far_into_the_song_you_are}"
          note.prepare(duration: note.duration_in_milliseconds(@tempo))
          # puts "note.initial_play_time: #{note.initial_play_time}"
          # puts "note.how_far_into_the_song_you_are: #{note.how_far_into_the_song_you_are}"
          sleep_amount = (note.initial_play_time - note.how_far_into_the_song_you_are)/1000.0
          #puts sleep_amount
          unless sleep_amount < 0
            sleep sleep_amount
          end
          Thread.pass
          note.play_prepared
        end
        
      end
        Thread.pass
    end
  end
  notes.each {|t| t.join}
end