Class: MIDIMessage::Parser
- Inherits:
-
Object
- Object
- MIDIMessage::Parser
- Defined in:
- lib/midi-message/parser.rb
Overview
very simple parsing for more advanced parsing check out nibbler
Instance Method Summary collapse
-
#initialize(*a) ⇒ Parser
constructor
can take either a hex string eg Parser.new(“904040”) or bytes eg Parser.new(0x90, 0x40, 0x40) or an array of bytes eg Parser.new([0x90, 0x40, 0x40]).
- #parse ⇒ Object
Constructor Details
#initialize(*a) ⇒ Parser
can take either a hex string eg Parser.new(“904040”) or bytes eg Parser.new(0x90, 0x40, 0x40) or an array of bytes eg Parser.new([0x90, 0x40, 0x40])
13 14 15 16 17 18 19 |
# File 'lib/midi-message/parser.rb', line 13 def initialize(*a) @data = case a.first when Array then a.first when Numeric then a when String then TypeConversion.hex_string_to_numeric_byte_array(a.first) end end |
Instance Method Details
#parse ⇒ Object
21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 |
# File 'lib/midi-message/parser.rb', line 21 def parse first_nibble = ((@data.first & 0xF0) >> 4) second_nibble = (@data.first & 0x0F) case first_nibble when 0x8 then NoteOff.new(second_nibble, @data[1], @data[2]) when 0x9 then NoteOn.new(second_nibble, @data[1], @data[2]) when 0xA then PolyphonicAftertouch.new(second_nibble, @data[1], @data[2]) when 0xB then ControlChange.new(second_nibble, @data[1], @data[2]) when 0xC then ProgramChange.new(second_nibble, @data[1]) when 0xD then ChannelAftertouch.new(second_nibble, @data[1]) when 0xE then PitchBend.new(second_nibble, @data[1], @data[2]) when 0xF then case second_nibble when 0x0 then SystemExclusive.new(*@data) when 0x1..0x6 then SystemCommon.new(second_nibble, @data[1], @data[2]) when 0x8..0xF then SystemRealtime.new(second_nibble) else nil end else nil end end |