def system_commons(self, common_type, common_data): "Dispatches system common messages" stream = self.outstream # MTC Midi time code Quarter value if common_type == MTC: data = readBew(common_data) msg_type = (data & 0x07) >> 4 values = (data & 0x0F) stream.midi_time_code(msg_type, values) elif common_type == SONG_POSITION_POINTER: hibyte, lobyte = toBytes(common_data) value = (hibyte << 7) + lobyte stream.song_position_pointer(value) elif common_type == SONG_SELECT: data = readBew(common_data) stream.song_select(data) elif common_type == TUNING_REQUEST: # no data then stream.tuning_request(time=None)
def channel_messages(self, hi_nible, channel, data): "Dispatches channel messages" stream = self.outstream data = toBytes(data) if (NOTE_ON & 0xF0) == hi_nible: note, velocity = data # note_on with velocity 0x00 are same as note # off with velocity 0x40 according to spec! if velocity == 0 and self.convert_zero_velocity: stream.note_off(channel, note, 0x40) else: stream.note_on(channel, note, velocity) elif (NOTE_OFF & 0xF0) == hi_nible: note, velocity = data stream.note_off(channel, note, velocity) elif (AFTERTOUCH & 0xF0) == hi_nible: note, velocity = data stream.aftertouch(channel, note, velocity) elif (CONTINUOUS_CONTROLLER & 0xF0) == hi_nible: controller, value = data # A lot of the cc's are defined, so we trigger those directly if self.dispatch_continuos_controllers: self.continuous_controllers(channel, controller, value) else: stream.continuous_controller(channel, controller, value) elif (PATCH_CHANGE & 0xF0) == hi_nible: program = data[0] stream.patch_change(channel, program) elif (CHANNEL_PRESSURE & 0xF0) == hi_nible: pressure = data[0] stream.channel_pressure(channel, pressure) elif (PITCH_BEND & 0xF0) == hi_nible: hibyte, lobyte = data value = (hibyte << 7) + lobyte stream.pitch_bend(channel, value) else: raise ValueError('Illegal channel message!')
def meta_event(self, meta_type, data): "Dispatches meta events" stream = self.outstream # SEQUENCE_NUMBER = 0x00 (00 02 ss ss (seq-number)) if meta_type == SEQUENCE_NUMBER: number = readBew(data) stream.sequence_number(number) # TEXT = 0x01 (01 len text...) elif meta_type == TEXT: stream.text(data) # COPYRIGHT = 0x02 (02 len text...) elif meta_type == COPYRIGHT: stream.copyright(data) # SEQUENCE_NAME = 0x03 (03 len text...) elif meta_type == SEQUENCE_NAME: stream.sequence_name(data) # INSTRUMENT_NAME = 0x04 (04 len text...) elif meta_type == INSTRUMENT_NAME: stream.instrument_name(data) # LYRIC = 0x05 (05 len text...) elif meta_type == LYRIC: stream.lyric(data) # MARKER = 0x06 (06 len text...) elif meta_type == MARKER: stream.marker(data) # CUEPOINT = 0x07 (07 len text...) elif meta_type == CUEPOINT: stream.cuepoint(data) # PROGRAM_NAME = 0x08 (05 len text...) elif meta_type == PROGRAM_NAME: stream.program_name(data) # DEVICE_NAME = 0x09 (09 len text...) elif meta_type == DEVICE_NAME: stream.device_name(data) # MIDI_CH_PREFIX = 0x20 (20 01 channel) elif meta_type == MIDI_CH_PREFIX: channel = readBew(data) stream.midi_ch_prefix(channel) # MIDI_PORT = 0x21 (21 01 port (legacy stuff)) elif meta_type == MIDI_PORT: port = readBew(data) stream.midi_port(port) # END_OFF_TRACK = 0x2F (2F 00) elif meta_type == END_OF_TRACK: stream.end_of_track() # TEMPO = 0x51 (51 03 tt tt tt (tempo in us/quarternote)) elif meta_type == TEMPO: b1, b2, b3 = toBytes(data) # uses 3 bytes to represent time between quarter # notes in microseconds stream.tempo((b1 << 16) + (b2 << 8) + b3) # SMTP_OFFSET = 0x54 (54 05 hh mm ss ff xx) elif meta_type == SMTP_OFFSET: hour, minute, second, frame, framePart = toBytes(data) stream.smtp_offset(hour, minute, second, frame, framePart) # TIME_SIGNATURE = 0x58 (58 04 nn dd cc bb) elif meta_type == TIME_SIGNATURE: nn, dd, cc, bb = toBytes(data) stream.time_signature(nn, dd, cc, bb) # KEY_SIGNATURE = 0x59 (59 02 sf mi) elif meta_type == KEY_SIGNATURE: sf, mi = toBytes(data) stream.key_signature(sf, mi) # SPECIFIC = 0x7F (Sequencer specific event) elif meta_type == SPECIFIC: meta_data = toBytes(data) stream.sequencer_specific(meta_data) # Handles any undefined meta events else: # undefined meta type meta_data = toBytes(data) stream.meta_event(meta_type, meta_data)