Module: MIDIMessage::SystemExclusive

Includes:
MIDIMessage
Included in:
Command, Request
Defined in:
lib/midi-message/system_exclusive.rb,
lib/midi-message/messages.rb

Overview

MIDI System-Exclusive Messages (SysEx)

Defined Under Namespace

Modules: InstanceMethods Classes: Command, Message, Node, Request

Constant Summary

Constants included from MIDIMessage

ChannelPressure, Controller, PolyAftertouch, PolyPressure, PolyphonicPressure, VERSION

Class Method Summary collapse

Methods included from MIDIMessage

parse, with_context

Class Method Details

.included(base) ⇒ Object 



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# File 'lib/midi-message/system_exclusive.rb', line 8

def self.included(base)
  base.send(:include, InstanceMethods)
end

.new(*bytes) ⇒ Object

Convert raw MIDI data to SysEx message objects



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# File 'lib/midi-message/system_exclusive.rb', line 187

def self.new(*bytes)

  start_status = bytes.shift
  end_status = bytes.pop

  if start_status == 0xF0 && end_status == 0xF7

    type_byte = bytes[3]

    # if the 4th byte isn't status, we will just make this a Message object -- this may need some tweaking
    if type_byte == 0x11
      msg_class = Request
    elsif type_byte == 0x12
      msg_class = Command
    else
      return Message.new(bytes)
    end

    fixed_length_message_part = bytes.slice!(0,7)

    manufacturer_id = fixed_length_message_part[0]
    device_id = fixed_length_message_part[1]
    model_id = fixed_length_message_part[2]

    address = fixed_length_message_part.slice(4,3)
    checksum = bytes.slice!((bytes.length - 1), 1)
    value = bytes

    node = Node.new(manufacturer_id, :model_id => model_id, :device_id => device_id)
    msg_class.new(address, value, :checksum => checksum, :node => node)
  end
end