Class: Bio::Sequence::NA::MidiTrack

Inherits:
Object
  • Object
show all
Defined in:
lib/bio/shell/plugin/midi.rb

Constant Summary collapse

MidiProg = 
[
  "Acoustic Grand Piano",
  "Bright Acoustic Piano",
  "Electric grand Piano",
  "Honky Tonk Piano",
  "Eiectric Piano 1",
  "Electric Piano 2",
  "Harpsichord",
  "Clavinet",
  "Celesra",
  "Glockenspiel",
  "Music Box",
  "Vibraphone",
  "Marimba",
  "Xylophone",
  "Tubular bells",
  "Dulcimer",
  "Drawbar Organ",
  "Percussive Organ",
  "Rock Organ",
  "Church Organ",
  "Reed Organ",
  "Accordion",
  "Harmonica",
  "Tango Accordion",
  "Nylon Accustic Guitar",
  "Steel Acoustic Guitar",
  "Jazz Electric Guitar",
  "Ciean Electric Guitar",
  "Muted Electric Guitar",
  "Overdrive Guitar",
  "Distorted Guitar",
  "Guitar Harmonics",
  "Acoustic Bass",
  "Electric Fingered Bass",
  "Electric Picked Bass",
  "Fretless Bass",
  "Slap Bass 1",
  "Slap Bass 2",
  "Syn Bass 1",
  "Syn Bass 2",
  "Violin",
  "Viola",
  "Cello",
  "Contrabass",
  "Tremolo Strings",
  "Pizzicato Strings",
  "Orchestral Harp",
  "Timpani",
  "String Ensemble 1",
  "String Ensemble 2 (Slow)",
  "Syn Strings 1",
  "Syn Strings 2",
  "Choir Aahs",
  "Voice Oohs",
  "Syn Choir",
  "Orchestral Hit",
  "Trumpet",
  "Trombone",
  "Tuba",
  "Muted Trumpet",
  "French Horn",
  "Brass Section",
  "Syn Brass 1",
  "Syn Brass 2",
  "Soprano Sax",
  "Alto Sax",
  "Tenor Sax",
  "Baritone Sax",
  "Oboe",
  "English Horn",
  "Bassoon",
  "Clarinet",
  "Piccolo",
  "Flute",
  "Recorder",
  "Pan Flute",
  "Bottle Blow",
  "Shakuhachi",
  "Whistle",
  "Ocarina",
  "Syn Square Wave",
  "Syn Sawtooth Wave",
  "Syn Calliope",
  "Syn Chiff",
  "Syn Charang",
  "Syn Voice",
  "Syn Fifths Sawtooth Wave",
  "Syn Brass & Lead",
  "New Age Syn Pad",
  "Warm Syn Pad",
  "Polysynth Syn Pad",
  "Choir Syn Pad",
  "Bowed Syn Pad",
  "Metal Syn Pad",
  "Halo Syn Pad",
  "Sweep Syn Pad",
  "SFX Rain",
  "SFX Soundtrack",
  "SFX Crystal",
  "SFX Atmosphere",
  "SFX Brightness",
  "SFX Goblins",
  "SFX Echoes",
  "SFX Sci-fi",
  "Sitar",
  "Banjo",
  "Shamisen",
  "Koto",
  "Kalimba",
  "Bag Pipe",
  "Fiddle",
  "Shanai",
  "Tinkle Bell",
  "Agogo",
  "Steel Drums",
  "Woodblock",
  "Taiko Drum",
  "Melodic Tom",
  "Syn Drum",
  "Reverse Cymbal",
  "Guitar Fret Noise",
  "Breath Noise",
  "Seashore",
  "Bird Tweet",
  "Telephone Ring",
  "Helicopter",
  "Applause",
  "Gun Shot"
]
Styles = 
{
  #    "Ohno" => {
  #      # http://home.hiroshima-u.ac.jp/cato/bunkakoryuron.html
  #    },
  "Ichinose" => {
    :tempo => 120,
    :scale => [0, 2, 4, 5, 7, 9, 11],
    :tones => [
      {:prog =>  9, :base => 60, :range => 2},
      {:prog => 13, :base => 48, :range => 2},
      {:prog => 41, :base => 48, :range => 2},
      {:prog => 44, :base => 36, :range => 2},
    ]
  },
  "Okinawan" => {
    :tempo => 180,
    :scale => [0,4,5,7,11],
    :tones => [
      {:prog => MidiProg.index("Harpsichord"),   :base => 60, :range => 2},
      {:prog => MidiProg.index("Dulcimer"),      :base => 48, :range => 2},
      {:prog => MidiProg.index("Fretless Base"), :base => 36, :range => 1},
    ]
  },
  "Major" => {
    :scale => [0,2,4,5,7,9,11],
  },
  "Minor" => {
    :scale => [0,2,3,5,7,9,10],
  },
  "Harmonic minor" => {
    :scale => [0,2,3,5,7,9,11],
  },
  "Whole tone" => {
    :scale => [0,2,4,6,8,10],
  },
  "Half tone" => {
    :scale => [0,1,2,3,4,5,6,7,8,9,10,11],
  },
  "Indian" => {
    :scale => [0,1,4,5,7,8,11],
  },
  "Arabic" => {
    :scale => [0,2,3,6,7,8,11],
  },
  "Spanish" => {
    :scale => [0,1,3,4,5,7,8,10],
  },
  "Japanese" => {
    :scale => [0,2,5,7,9],
  },
}

Instance Method Summary collapse

Constructor Details

#initialize(channel = 0, program = nil, base = nil, range = nil, scale = nil) ⇒ MidiTrack

Returns a new instance of MidiTrack.



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# File 'lib/bio/shell/plugin/midi.rb', line 207

def initialize(channel = 0, program = nil, base = nil, range = nil, scale = nil)
  @channel = channel & 0xff
  @program = program || 0
  @base    = base    || 60
  @range   = range   || 2
  @scale   = scale   || [0, 2, 4, 5, 7, 9, 11]

  @tunes   = []
  @tune    = 0
  @code    = []
  @time    = 0

  @range.times do |i|
    @scale.each do |c|
      @tunes.push c + i * 12
    end
  end

  @ttype = {
    'aa' =>  1, 'at' =>  0, 'ac' => 3, 'ag' => -1,
    'ta' =>  0, 'tt' => -1, 'tc' => 1, 'tg' => -2,
    'ca' =>  2, 'ct' =>  1, 'cc' => 2, 'cg' =>  6,
    'ga' => -1, 'gt' => -3, 'gc' => 0, 'gg' => -2,
  }
  @dtype = [
    { 'aa' => 2, 'at' => 4, 'ac' => 4, 'ag' => 2,
      'ta' => 2, 'tt' => 4, 'tc' => 4, 'tg' => 2,
      'ca' => 2, 'ct' => 3, 'cc' => 1, 'cg' => 2,
      'ga' => 1, 'gt' => 2, 'gc' => 2, 'gg' => 3,
    },
    { 'aa' => 3, 'at' => 3, 'ac' => 2, 'ag' => 3,
      'ta' => 3, 'tt' => 3, 'tc' => 2, 'tg' => 2,
      'ca' => 3, 'ct' => 2, 'cc' => 1, 'cg' => 1,
      'ga' => 1, 'gt' => 1, 'gc' => 1, 'gg' => 1,
    },
    { 'aa' => 2, 'at' => 2, 'ac' => 2, 'ag' => 2,
      'ta' => 1, 'tt' => 1, 'tc' => 2, 'tg' => 2,
      'ca' => 2, 'ct' => 2, 'cc' => 2, 'cg' => 3,
      'ga' => 2, 'gt' => 2, 'gc' => 3, 'gg' => 1,
    },
    { 'aa' => 1, 'at' => 1, 'ac' => 1, 'ag' => 1,
      'ta' => 1, 'tt' => 1, 'tc' => 1, 'tg' => 1,
      'ca' => 1, 'ct' => 1, 'cc' => 1, 'cg' => 3,
      'ga' => 1, 'gt' => 1, 'gc' => 1, 'gg' => 1,
    },
  ]

  @code.concat [0x00, 0xc0 | (@channel & 0xff)]
  @code.concat icode(@program & 0xff, 1)
end

Instance Method Details

#c2s(code) ⇒ Object 



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# File 'lib/bio/shell/plugin/midi.rb', line 277

def c2s(code)
  ans = ""
  code.each do |c|
    ans += c.chr
  end
  ans
end

#encode ⇒ Object 



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# File 'lib/bio/shell/plugin/midi.rb', line 317

def encode
  ans ="MTrk"
  ans += c2s(icode(@code.length + 4, 4))
  ans += c2s(@code)
  ans += c2s([0x00, 0xff, 0x2f, 0x00])
  ans
end

#header(num, tempo = 120) ⇒ Object 



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# File 'lib/bio/shell/plugin/midi.rb', line 325

def header(num, tempo = 120)
  ans = "MThd"
  ans += c2s(icode(6, 4))
  ans += c2s(icode(1, 2))
  ans += c2s(icode(num + 1, 2))
  ans += c2s(icode(480, 2))
  ans += "MTrk"
  ans += c2s(icode(11, 4))
  ans += c2s([0x00, 0xff, 0x51, 0x03])
  ans += c2s(icode(60000000 / tempo, 3))
  ans += c2s([0x00, 0xff, 0x2f, 0x00])
  ans
end

#icode(num, n) ⇒ Object 



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# File 'lib/bio/shell/plugin/midi.rb', line 258

def icode(num, n)
  code = []
  n.times do |i|
    code.push num & 0xff
    num >>= 8
  end
  code.reverse
end

#push(s) ⇒ Object 



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# File 'lib/bio/shell/plugin/midi.rb', line 285

def push(s)
  tt = @time % 4
  t = @ttype[s[0, 2]]
  d = @dtype[tt][s[2, 2]]
  if !t.nil? && !d.nil?
    @tune += t
    @tune %= @tunes.length
    if tt == 0
      vel = 90
    elsif tt == 1 && d > 1
      vel = 100
    elsif tt == 2
      vel = 60
    else
      vel = 50
    end
    @code.concat rcode(1)
    @code.concat [0x90 | @channel, @tunes[@tune] + @base, vel]
    @code.concat rcode(240 * d)
    @code.concat [0x80 | @channel, @tunes[@tune] + @base, 0]
    @time += d
  end
end

#push_silent(d) ⇒ Object 



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# File 'lib/bio/shell/plugin/midi.rb', line 309

def push_silent(d)
  @code.concat rcode(1)
  @code.concat [0x90 | @channel, 0, 0]
  @code.concat rcode(240 * d)
  @code.concat [0x80 | @channel, 0, 0]
  @time += d;
end

#rcode(num) ⇒ Object 



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# File 'lib/bio/shell/plugin/midi.rb', line 267

def rcode(num)
  code = []
  code.push num & 0x7f
  while num > 0x7f
    num >>= 7
    code.push num & 0x7f | 0x80
  end
  code.reverse
end