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(*args) ⇒ 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
Parse the data and return a message.
Constructor Details
#initialize(*args) ⇒ 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])
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# File 'lib/midi-message/parser.rb', line 10 def initialize(*args) @data = case args.first when Array then args.first when Numeric then args when String then TypeConversion.hex_string_to_numeric_byte_array(args.first) end end |
Instance Method Details
#parse ⇒ Object
Parse the data and return a message
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# File 'lib/midi-message/parser.rb', line 19 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 |