def __init__(self,
xml_dict,
midi_in,
midi_out,
ignore_sysex=True,
ignore_timing=True,
ignore_active_sense=True):
"""
Calls the MidiInputHandler constructor and initializes the sub class
attributes
Parameters:
* xml_dict: dictionary containing the parsed values from the xml
configuration file
* midi_in: MIDI IN interface to use
* midi_out: MIDI OUT interface to use
* ignore_* parameters: see the "_ignore_messages" method
"""
self.__log.debug("Initializing MidiProcessor")
super().__init__(midi_in, midi_out, ignore_sysex, ignore_timing,
ignore_active_sense)
self._xml_dict = xml_dict
self._quit = False
self._status = None
self._panic_command = []
self._send_bank_names = "F0 7D 00 "
self.__log.debug("MidiProcessor Initialized:\n%s",
PrettyFormat(self.__dict__))
def _send_system_exclusive(self, message):
"""
Handles a SysEx (system exlusive) message. By default it just sends it
back.
Parameters:
* message: Contains a list with the bytes of the MIDI Message, ie:
[240, 67, 112, 247] (in Hexadecimal: F0 43 70, F7). Please note that
if the SysEx message is too long, then this method will be called
several times untill the end byte of the SysEx (0xF7) gets sent.
Remarks:
* Please note that this callback isn't supposed to be overwritten by
a subclass. Instead of doing this, create a handler called:
_on_system_exclusive (Here I'm assuming that _callback_preffix is
equal to "_on_"), then leave the part receiving the SysEx equal; only
after you have received the whole SysEx, you should add your post
processing. You must also clear the SysEx buffer afterwards
"""
if not self._receive_sysex(message):
self.__log.debug("Sending SysEx message: %s", message)
#This means that the end of the SysEx message (0xF7) was detected,
#so, no further bytes will be received. Here the SysEx buffer will
#be sent and afterwards cleared
if (self._midi_out == None) or (self._console_echo):
self.__log.info(PrettyFormat(self._sysex_buffer))
if self._midi_out != None:
self._midi_out.send_message(self._sysex_buffer)
#Clears SysEx buffer
self._sysex_buffer = []
#Resets SysEx count to zero
self._sysex_chunk = 0
self.__log.debug("SysEx message was sent")
def _get_all_ports(self):
"""
Gets all the available MIDI IN and Out ports.
"""
in_ports = []
out_ports = []
if self._open_midi():
self.__log.debug("Getting all MIDI IN ports")
in_ports = self._get_midi_ports(self._midi_in)
self.__log.debug("Got:\n%s", PrettyFormat(in_ports))
self.__log.debug("Getting all MIDI OUT ports")
out_ports = self._get_midi_ports(self._midi_out)
self.__log.debug("Got:\n%s", PrettyFormat(out_ports))
self._in_ports = in_ports
self._out_ports = out_ports
self._free_midi()
def _parse_panic(self):
"""
Parses the panic mode
"""
self.__log.debug("Parsing XML node: Panic")
node = self._xml_dict.get("Panic")
if node != None:
if type(node) == str:
node_str = node
command_file = None
else:
node_str = node.get('$')
command_file = node.get('@File')
commad_list = []
if node_str != None:
commad_list = self._parse_panic_string(node_str)
if (commad_list != []) and command_file:
message = "The Panic node only accepts either the inline command or a" \
" 'File' attribute, but not both"
self.__log.debug(message)
raise Exception(message)
if (commad_list == []) and command_file:
is_valid, command_str = read_text_file(command_file)
if not is_valid:
message = "Trouble accessing file: %s" % command_file
self.__log.debug(message)
raise Exception(message)
commad_list = self._parse_panic_string(command_str)
self._panic_command = commad_list
self.__log.debug("Got:\n%s", PrettyFormat(self._panic_command))
self.__log.debug("Node was parsed")
def _open_port(self, interface_type, midi_port, is_virtual=False):
"""
Opens the specified MIDI port for the entered midi_callback
Parameters:
* interface_type: which interface to open: 'input' or 'output'
* midi_port: MIDI port used to open the MIDI interface
* is_virtual: whether or not the port is virtual
Returns:
* In case of opening a virtual port, it will return a MIDI interface
"""
if not is_virtual:
self.__log.debug("Opening MIDI port: %s", PrettyFormat(midi_port))
port_name = None
client_name = None
else:
self.__log.debug("Opening Virtual MIDI port")
port_name = midi_port
midi_port = None
client_name = VIRTUAL_PREFFIX[:-1]
try:
midi_interface = open_midiport(port=midi_port,
type_=interface_type,
use_virtual=is_virtual,
interactive=False,
client_name=client_name,
port_name=port_name)[0]
except:
error = traceback.format_exc()
self.__log.info(error)
self._free_midi()
sys.exit()
return midi_interface
def __call__(self, event, data=None):
self.__log.debug("Executing callback with: %s", PrettyFormat(event))
message, deltatime = event
status = message[0]
if message[0] != SYSTEM_EXCLUSIVE:
new_status = message[0] & 0xF0
if new_status != SYSTEM_EXCLUSIVE:
#This will avoid that messages like SONG_START (0XFA) get
#wrongly classified as SysEx
status = new_status
midi_message = self._midi_messages.get(status, None)
callback_name = '_send_midi_message'
if midi_message is None:
if len(self._sysex_buffer) != 0:
self.__log.debug("Catched SysEx message chunk")
#This means that a SysEx message started
callback_name = self._callback_preffix + 'system_exclusive'
else:
self.__log.debug("Catched unhandled MIDI message")
else:
self.__log.debug("Catched message: %s", midi_message)
callback_name = self._callback_preffix + midi_message
callback = getattr(self, callback_name)
callback(message)
self.__log.debug("Callback was excecuted")
def _get_midi_ports(self, midi_interface):
"""
Gets the available ports for the specified MIDI interface
Parameters:
* midi_interface: interface used for listing the ports. It can be
either _midi_in or _midi_out.
"""
self.__log.debug("Getting available MIDI ports")
ports = midi_interface.get_ports()
self.__log.debug("Got:\n%s", PrettyFormat(ports))
port_index = 0
for port in ports:
port_index_str = str(port_index)
ports[port_index] = port
port_index += 1
self.__log.debug("Fixed port indexes:\n%s", PrettyFormat(ports))
return ports
def _get_formatted_port_list(self, port_list):
"""
Gets the port list as follows:
<port_index>: <port_name>
"""
self.__log.debug("Getting formatted port list")
port_list_tuples = []
for port_index, port_name in enumerate(port_list):
port_list_tuples.append(str(port_index + 1) + ": " + port_name)
self.__log.debug("Got: %s", PrettyFormat(port_list_tuples))
return '\n\r'.join(port_list_tuples)
def _send_system_exclusive(self, message):
"""
Overrides the _send_system_exclusive method from MidiInputHandler.
"""
self.__log.debug("Sending SysEx message: %s", PrettyFormat(message))
if not self._receive_sysex(message) and self._xml_dict["@MidiEcho"]:
#This means that the end of the SysEx message (0xF7) was detected,
#so, no further bytes will be received. Here the SysEx buffer will
#be sent and afterwards cleared
self._midi_out.send_message(self._sysex_buffer)
#Clears SysEx buffer
self._sysex_buffer = []
#Resets SysEx count to zero
self._sysex_chunk = 0
self.__log.debug("SysEx was sent")
def __init__(self,
midi_in,
midi_out,
console_echo=False,
ignore_sysex=True,
ignore_timing=True,
ignore_active_sense=True):
"""
Initializes the class attributes
Parameters:
* midi_in: MIDI IN interface to use
* midi_out: MIDI OUT interface to use. If None, then the messages will be
printed into the console
* console_echo: if used together with midi_out, then the message will be
first printed into the console, then it will be sent
* ignore_* parameters: see the "_ignore_messages" method
"""
self.__log.debug("Initializing MidiInputHandler")
self._midi_in = midi_in
self._midi_out = midi_out
self._console_echo = console_echo
self._sysex_buffer = []
self._sysex_chunk = 0
self._ignore_messages(ignore_sysex, ignore_timing, ignore_active_sense)
#Sets the main MIDI callback where all preprocessing will be done
self._midi_in.set_callback(self)
#Creates the built-in callbacks, which will only echo the MIDI message
base_callback = getattr(self, '_send_midi_message')
self.__log.debug("Setting callbacks")
for midi_message in self._midi_messages.values():
callback = base_callback
if midi_message == 'system_exclusive':
callback = getattr(self, '_send_system_exclusive')
message_callback_name = self._callback_preffix + midi_message
if not hasattr(self, message_callback_name):
#This means that the callback hasn't defined by a subclass, so
#it will define here at the superclass
setattr(self, message_callback_name, callback)
self.__log.debug("Callbacks were set")
self.__log.debug("MidiInputHandler was initialized:\n%s",
PrettyFormat(self.__dict__))
def __init__(self, args, xsd_schema='conf/MidiBassPedalController.xsd'):
"""
Initializes the MidiConnector class
Parameters:
* args: command-line arguments
* xsd_schema: path to the xsd schema
"""
self.__log.debug("Initializing MidiConnector")
self._args = args
self._xsd_schema = xsd_schema
self._midi_in = None
self._midi_out = None
self._in_ports = []
self._in_port = 0
self._use_virtual_in = False
self._out_ports = []
self._out_port = 0
self._use_virtual_out = False
self._xml_dict = {}
self.__log.debug("MidiConnector was initialized:\n%s",
PrettyFormat(self.__dict__))
def _parse_xml_config(self):
"""
Parses the specified xml configuration file
"""
self.__log.info("Parsing XML config: %s", self._xsd_schema)
exit = False
self.__log.debug("Calling XMLSchema11 api")
try:
xsd_schema = xmlschema.XMLSchema11(self._xsd_schema)
except:
exit = True
error = traceback.format_exc()
self.__log.info("Error while parsing xsd file:\n%s\n\n%s",
self._xsd_schema, error)
if not exit:
self.__log.debug("Converting XML schema to dict")
try:
xml_dict = xsd_schema.to_dict(self._args.config)
#A last manual validation must be done here: the InitialBank value must
#be less or equal than the total number of banks
if xml_dict['@InitialBank'] > len(xml_dict['Bank']):
raise Exception("InitialBank is higher than the possible number of "
"banks / maximum: " + str(len(xml_dict['Bank'])) + \
", given value: " + str(xml_dict['@InitialBank']))
self.__log.debug("Got: \n%s", PrettyFormat(xml_dict))
except:
exit = True
error = traceback.format_exc()
message = "Error while parsing xml file:\n%s\n\n%s" % (
self._args.config, error)
self.__log.info(message)
if exit:
self.__log.debug("Unexpected error occured, aborting...")
self._free_midi()
sys.exit()
self._xml_dict = xml_dict
def parse_xml(self):
"""Parses the xml dict"""
self.__log.debug("Parsing xml file")
self._current_bank = self._xml_dict['@InitialBank'] - 1
self._previous_pedals = {}
self.__log.info("Current Bank: %s", self._xml_dict['@InitialBank'])
self._parse_out_channels('BassPedal', self._xml_dict)
self._parse_out_channels('Chord', self._xml_dict)
self._parse_velocity_transpose("BassPedal", "Velocity", self._xml_dict)
self._parse_velocity_transpose("Chord", "Velocity", self._xml_dict)
self._parse_velocity_transpose("BassPedal", "Transpose",
self._xml_dict)
self._parse_velocity_transpose("Chord", "Transpose", self._xml_dict)
self._parse_octave(self._xml_dict)
if self._xml_dict["@Octave"] == None:
self._xml_dict["@Octave"] = 0
#Internally midi channels begin with zero
self._xml_dict['@InChannel'] -= 1
self._parse_panic()
self._parse_banks()
self._parse_start_stop("Start")
self._parse_start_stop("Stop")
self.__log.debug("Got:\n%s", PrettyFormat(self._xml_dict))
def _send_midi_message(self, message):
"""
Overrides the _send_midi_message method from MidiInputHandler.
"""
self.__log.debug("Processing MIDI message: %s", PrettyFormat(message))
messages = []
status = message[0] & 0xF0
channel = message[0] & 0x0F
is_controller_message = True
note_messages = []
bank_select_messages = []
midi_and_sysex_messages = []
panic_message = []
bank_select = None
current_velocity = None
if (self._xml_dict['@InChannel'] == channel):
current_bank = self._xml_dict['Bank'][self._current_bank]
process_bank_select = False
current_pedal = None
if status in [NOTE_ON, NOTE_OFF]:
self.__log.debug(
"NOTE message was sent to controller, checking if "
"there is a pedal")
current_note = message[1]
current_pedal = current_bank["@PedalList"].get(current_note)
if current_pedal != None:
self.__log.debug(
"Registered NOTE message was found, processing "
"actions")
swapped_note_message = False
current_velocity = message[2]
if (current_velocity
== 0) and self._xml_dict["@MinVelocityNoteOff"]:
self.__log.debug(
"Swapping NOTE ON message with a zero velocity "
"to a NOTE OFF message")
status = NOTE_OFF
swapped_note_message = True
note_messages, midi_and_sysex_messages, panic_message, bank_select = \
self._process_note_message(status, current_velocity,
swapped_note_message, current_pedal,
current_note)
process_bank_select = (bank_select != None)
else:
is_controller_message = False
self.__log.debug(
"Unregistered NOTE message, going to check MIDI "
"echo")
elif status == CONTROL_CHANGE:
controller = message[1]
if controller == self._xml_dict["@BankSelectController"]:
process_bank_select = True
else:
is_controller_message = False
self.__log.debug(
"CONTROL CHANGE message detected, going to check "
"MIDI echo")
if process_bank_select:
self.__log.debug("SelectBank message was detected, processing "
"actions")
bank_select_messages = self._process_bank_select(
message, bank_select)
messages.extend(midi_and_sysex_messages + note_messages +
bank_select_messages + panic_message)
else:
self.__log.debug(
"Non controller message was catched, going to check "
"MIDI echo")
is_controller_message = False
if not is_controller_message and self._xml_dict["@MidiEcho"]:
self.__log.debug("Midi echo was enabled")
messages = [message]
elif not self._xml_dict["@MidiEcho"]:
self.__log.debug("Midi echo is disabled. Message won't be sent")
for message in messages:
self.__log.debug("Sending MIDI message: %s", PrettyFormat(message))
self._midi_out.send_message(message)
def _process_note_message(self, status, current_velocity,
swapped_note_message, current_pedal,
current_note):
"""
Proceses the note messages for the current pedal
Parameters:
* status: current MIDI status; either NOTE ON or NOTE OFF
* current_velocity: current velocity of the catched note
* swapped_note_message: inidicated if this was a NOTE ON message with a
velocity of zero, which was changed to NOTE OFF. On this case, the
velocity won't be adjusted
* current_pedal: current catched pedal
* current_note: current MIDI note
Returns a tuple with the following elements:
* Note messages to send: bass pedal and chord notes.
* Other MIDI messages to send: it contains first the General MIDI and
SysEx messages, and the the bass and chord notes of other pedals.
* Panic message if SendPanic is True.
* The last element is the BankSelect message to excecute; it can be:
- None: no BankSelect was found or it is not a NOTE OFF message
- 'Next': select the next bank
- 'Previous': select previous bank
- 'Last': select the last bank
- 'Quit': quit the controller software
- 'Reload': restart the controller; here the whole xml
- 'Reboot': reboots the computer or microcontroller running the software
- 'Shutdown': shutdowns the system
- 'List': sends a SysEx back with the bank names.
Those messages are always processed during NOTE OFF and after all other
messages.
"""
note_messages = self._set_note_velocity(current_pedal, status,
current_velocity,
swapped_note_message)
messages = []
midi_and_sysex = current_pedal.get("@MessageList")
if (midi_and_sysex != None) and status in midi_and_sysex:
messages = midi_and_sysex[status]
if (len(note_messages) > 0):
if (status == NOTE_ON):
if self._xml_dict["@PedalMonophony"]:
self.__log.debug(
"Only one pedal is allowed at the time, so, notes for "
"previous pedals will be muted")
self.__log.debug(
"Sending NOTE OFF for previous pedals and then "
"remove them:\n%s",
PrettyFormat(self._previous_pedals))
pedal_list = list(self._previous_pedals.keys())
for pedal_index in pedal_list:
pedal = self._previous_pedals[pedal_index]['pedal']
messages.extend(
self._set_note_velocity(pedal, NOTE_OFF,
current_velocity, False))
self._previous_pedals.pop(pedal_index)
self.__log.debug("Adding pedal to previous pedal list")
self._previous_pedals[current_note] = {
'pedal': current_pedal,
'velocity': current_velocity
}
else:
if current_note in self._previous_pedals:
self.__log.debug("Removing pedal from previous pedal list")
self._previous_pedals.pop(current_note)
panic_message = []
if status == NOTE_OFF:
panic_message = current_pedal.get("@PanicMessage", [])
if panic_message != []:
self.__log.debug(
"Panic message will be sent after processing messages")
bank_select = None
if status == NOTE_OFF:
#The BANK SELECT messages will be processed only on NOTE OFF
bank_select = current_pedal.get("@BankSelect")
self.__log.debug("Previous pedals after processing:\n%s",
PrettyFormat(self._previous_pedals))
return note_messages, messages, panic_message, bank_select
def _process_bank_select(self, message, bank_select):
"""
Process the BankSelect message for the current pedal
Parameters:
* message: last message catched by the controller
* bank_select: BankSelect operation:
- None: no BankSelect was found or it is not a NOTE OFF message
- 'Next': select the next bank
- 'Previous': select previous bank
- 'Last': select the last bank
- 'Quit': quit the controller software
- 'Reload': restart the controller; here the whole xml
- 'Reboot': reboots the computer or microcontroller running the software
- 'Shutdown': shutdowns the system
- 'List': sends a SysEx back with the bank names.
Returns the resulting messages after processing the BankSelect message
"""
self.__log.debug("Previous pedals before processing Bank Select:\n%s",
PrettyFormat(self._previous_pedals))
messages = []
previous_bank = self._current_bank
if (bank_select != None):
if bank_select not in [
"Quit", "Reload", "Reboot", "Shutdown", "List"
]:
self._current_bank = bank_select
self.__log.info("Bank changed to: %d", bank_select + 1)
elif bank_select == "List":
messages = [self._xml_dict["@BanksSysEx"]]
else:
self._quit = True
self._status = bank_select
else:
select_value = message[2]
if select_value < 119:
if select_value >= len(self._xml_dict["Bank"]):
select_value = len(self._xml_dict["Bank"]) - 1
self._current_bank = select_value
self.__log.info("Bank changed to: %d", self._current_bank + 1)
else:
send_panic = False
send_bank_list = False
num_banks = len(self._xml_dict["Bank"])
if select_value == 119:
messages = [self._xml_dict["@BanksSysEx"]]
send_bank_list = True
elif select_value == 120:
self._current_bank -= 1
elif select_value == 121:
self._current_bank += 1
elif select_value == 122:
self._current_bank = num_banks - 1
elif select_value == 123:
send_panic = True
messages = self._panic_command
self.__log.debug("Sending software Panic:\n%s", \
PrettyFormat(self._panic_command))
else:
self._quit = True
self._status = BANK_SELECT_FUNCTIONS[select_value]
if not self._quit and not send_bank_list:
if self._current_bank < 0:
self._current_bank = num_banks - 1
elif self._current_bank >= num_banks:
self._current_bank = 0
self.__log.info("Bank changed to: %d",
self._current_bank + 1)
if previous_bank != self._current_bank:
on_bank_change = self._xml_dict.get("@OnBankChange")
if on_bank_change != "ContinuePlayback":
current_bank = self._xml_dict['Bank'][self._current_bank]
pedal_list = current_bank["@PedalList"]
self.__log.debug("Processing previous pedals for OnBankChange = %s" % \
on_bank_change)
pedal_operation = "Stopping previous pedals playback"
if on_bank_change == "QuickChange":
pedal_operation = "Replacing previous pedals according to current" + \
" bank"
self.__log.debug(pedal_operation)
previous_pedals = list(self._previous_pedals.keys())
for pedal_index in previous_pedals:
note_messages = []
pedal = self._previous_pedals[pedal_index]['pedal']
current_velocity = self._previous_pedals[pedal_index][
'velocity']
remove_pedal = False
if on_bank_change == "StopPlayback":
remove_pedal = True
else:
#QuickChange
new_pedal = pedal_list.get(pedal_index)
if (new_pedal == None):
remove_pedal = True
else:
#Replace this pedal
self._previous_pedals[pedal_index][
'pedal'] = new_pedal
self._previous_pedals[pedal_index][
'velocity'] = current_velocity
#First NOTE_OFF messages for previous pedal will be sent
note_messages = self._set_note_velocity(
pedal, NOTE_OFF, current_velocity, False)
#Then the NOTE_ON messages for the new pedal will be sent
note_messages.extend(
self._set_note_velocity(
new_pedal, NOTE_ON, current_velocity,
False))
if remove_pedal:
self._previous_pedals.pop(pedal_index)
note_messages = self._set_note_velocity(
pedal, NOTE_OFF, current_velocity, False)
messages.extend(note_messages)
self.__log.debug(
"Previous pedals after processing Bank Select:\n%s",
PrettyFormat(self._previous_pedals))
return messages
def _parse_port(self, port_list, arg_name):
"""
Gets the specified port from command line
Parameters:
* port_list: List of available MIDI ports
* arg_name: name of the argument to get. It can be: InPort or OutPort
Returns:
* A tupple containing:
- either a port index or a virtual port string name
- either if using a virtual or a real port
"""
self.__log.debug("Getting: %s from:\n%s", arg_name,
PrettyFormat(port_list))
use_virtual = False
num_ports = len(port_list)
port_value = self._xml_dict.get('@' + arg_name, num_ports)
self.__log.debug("Port value: %s", port_value)
if (type(port_value) == str) and port_value.isdigit():
port_value = int(port_value)
elif type(port_value) == str:
is_windows = (platform.system() == "Windows")
if port_value.startswith(VIRTUAL_PREFFIX):
if not is_windows:
#Virtual port only work unser MACOS and Linux. Windows doesn't
#supports this. On the last operating system, the Virtual part will be
#removed and it will be threatened as a normal port. You can assure
#compatibilty between Windows and other OS by creating first the ports
#with loopMIDI
use_virtual = True
elif port_value[-1] != '*':
port_value += '*'
port_value = port_value[len(VIRTUAL_PREFFIX):]
if not use_virtual:
self.__log.debug("Searching port")
#On this case, a string with part of the name was given, so, it
#will be searched in the available ports
port_index = 0
port_found = False
for port_name in port_list:
filtered = fnmatch.filter([port_name], port_value)
if filtered != []:
port_found = True
break
port_index += 1
if not port_found:
self.__log.info("The %s: %s wasn't found.", arg_name,
port_value)
self._free_midi()
self.__log.debug("Port wasn't found, exiting")
sys.exit()
port_value = port_index + 1
self.__log.debug("Port was found, index: %d", port_value)
else:
self.__log.debug("Virutal Port will be used")
if not use_virtual:
#Internally, port numbers start from 0 because they are in an array
port_value -= 1
if port_value >= num_ports:
self.__log.info("Invalid port number was supplied")
self._free_midi()
self.__log.debug("Exiting after getting invalid port")
sys.exit()
return port_value, use_virtual
