import abc import select import socket from time import sleep from threading import Thread from typing import NamedTuple, NoReturn, Optional, Union from .errors import VMCMDErrors from . import kinds from .dataclass import ( HEADER_SIZE, VBAN_VMRT_Packet_Data, VBAN_VMRT_Packet_Header, RegisterRTHeader, TextRequestHeader ) from .strip import InputStrip from .bus import OutputBus from .command import Command class VbanCmd(abc.ABC): def __init__(self, **kwargs): self._ip = kwargs['ip'] self._port = kwargs['port'] self._streamname = kwargs['streamname'] self._bps = kwargs['bps'] self._channel = kwargs['channel'] self._delay = kwargs['delay'] self._ratelimiter = kwargs['ratelimiter'] self._bps_opts = \ [0, 110, 150, 300, 600, 1200, 2400, 4800, 9600, 14400, 19200, 31250, 38400, 57600, 115200, 128000, 230400, 250000, 256000, 460800,921600, 1000000, 1500000, 2000000, 3000000] if self._channel not in range(256): raise VMCMDErrors('Channel must be in range 0 to 255') self._text_header = TextRequestHeader( name=self._streamname, bps_index=self._bps_opts.index(self._bps), channel=self._channel ) self._register_rt_header = RegisterRTHeader() self.expected_packet = VBAN_VMRT_Packet_Header() self._rt_register_socket = socket.socket(socket.AF_INET, socket.SOCK_DGRAM) self._rt_packet_socket = socket.socket(socket.AF_INET, socket.SOCK_DGRAM) self._sendrequest_string_socket = socket.socket(socket.AF_INET, socket.SOCK_DGRAM) is_readable = [] is_writable = [self._rt_register_socket, self._rt_packet_socket, self._sendrequest_string_socket] is_error = [] self.ready_to_read, self.ready_to_write, in_error = select.select(is_readable, is_writable, is_error, 60) self._public_packet = None self.running = True self._pdirty = False self.cache = {} def __enter__(self): self.login() return self def _send_register_rt(self): """ Continuously register to the RT Packet Service This function to be run in its own thread. """ while self.running: if self._rt_register_socket in self.ready_to_write: self._rt_register_socket.sendto( self._register_rt_header.header, (socket.gethostbyname(self._ip), self._port) ) count = int.from_bytes(self._register_rt_header.framecounter, 'little') + 1 self._register_rt_header.framecounter = count.to_bytes(4, 'little') sleep(10) def _fetch_rt_packet(self) -> Optional[VBAN_VMRT_Packet_Data]: """ Returns a valid RT Data Packet or None """ if self._rt_packet_socket in self.ready_to_write: data, _ = self._rt_packet_socket.recvfrom(1024*1024*2) # check for packet data if len(data) > HEADER_SIZE: # check if packet is of type rt service if self.expected_packet.header == data[:HEADER_SIZE-4]: return VBAN_VMRT_Packet_Data( _voicemeeterType=data[28:29], _reserved=data[29:30], _buffersize=data[30:32], _voicemeeterVersion=data[32:36], _optionBits=data[36:40], _samplerate=data[40:44], _inputLeveldB100=data[44:112], _outputLeveldB100=data[112:240], _TransportBit=data[240:244], _stripState=data[244:276], _busState=data[276:308], _stripGaindB100Layer1=data[308:324], _stripGaindB100Layer2=data[324:340], _stripGaindB100Layer3=data[340:356], _stripGaindB100Layer4=data[356:372], _stripGaindB100Layer5=data[372:388], _stripGaindB100Layer6=data[388:404], _stripGaindB100Layer7=data[404:420], _stripGaindB100Layer8=data[420:436], _busGaindB100=data[436:452], _stripLabelUTF8c60=data[452:932], _busLabelUTF8c60=data[932:1412], ) @property def pdirty(self): """ True iff a parameter has changed """ return self._pdirty @property def public_packet(self): return self._public_packet @public_packet.setter def public_packet(self, val): self._public_packet = val def _keepupdated(self) -> NoReturn: """ Continously update public packet in background. Set parameter dirty flag. Update public packet only if new private packet is found. This function to be run in its own thread. """ while self.running: private_packet = self._get_rt() self._pdirty = private_packet.isdirty(self.public_packet) if not private_packet.__eq__(self.public_packet): self.public_packet = private_packet def _get_rt(self) -> VBAN_VMRT_Packet_Data: """ Attempt to fetch data packet until a valid one found """ def fget(): data = False while not data: data = self._fetch_rt_packet() return data return fget() def set_rt(self, id_: str, param: Optional[str]=None, val: Optional[Union[int, float]]=None): """ Sends a string request command over a network. """ cmd = id_ if not param and val else f'{id_}.{param}={val}' if self._sendrequest_string_socket in self.ready_to_write: self._sendrequest_string_socket.sendto( self._text_header.header + cmd.encode(), (socket.gethostbyname(self._ip), self._port) ) count = int.from_bytes(self._text_header.framecounter, 'little') + 1 self._text_header.framecounter = count.to_bytes(4, 'little') self.cache[f'{id_}.{param}'] = [val, True] sleep(0.018) def sendtext(self, cmd): """ Sends a multiple parameter string over a network. """ self.set_rt(cmd) sleep(self._delay) @property def type(self): """ Returns the type of Voicemeeter installation. """ return self.public_packet.voicemeetertype @property def version(self): """ Returns Voicemeeter's version as a tuple """ return self.public_packet.voicemeeterversion def show(self) -> NoReturn: """ Shows Voicemeeter if it's hidden. """ self.set_rt('Command', 'Show', 1) def hide(self) -> NoReturn: """ Hides Voicemeeter if it's shown. """ self.set_rt('Command', 'Show', 0) def shutdown(self) -> NoReturn: """ Closes Voicemeeter. """ self.set_rt('Command', 'Shutdown', 1) def restart(self) -> NoReturn: """ Restarts Voicemeeter's audio engine. """ self.set_rt('Command', 'Restart', 1) def apply(self, mapping: dict): """ Sets all parameters of a di """ for key, submapping in mapping.items(): obj, index = key.split('-') if obj in ('strip'): target = self.strip[int(index)] elif obj in ('bus'): target = self.bus[int(index)] else: raise ValueError(obj) target.apply(submapping) def login(self): """ Start listening for RT Packets Start background threads: Register to RT service Keep public packet updated. """ self._rt_packet_socket.bind((socket.gethostbyname(socket.gethostname()), self._port)) worker = Thread(target=self._send_register_rt, daemon=True) worker.start() self._public_packet = self._get_rt() worker2 = Thread(target=self._keepupdated, daemon=True) worker2.start() def logout(self): """ sets thread flag, closes sockets """ self.running = False sleep(0.2) self._rt_register_socket.close() self._sendrequest_string_socket.close() self._rt_packet_socket.close() def __exit__(self, exc_type, exc_value, exc_traceback): self.logout() def _make_remote(kind: NamedTuple) -> VbanCmd: """ Creates a new remote class and sets its number of inputs and outputs for a VM kind. The returned class will subclass VbanCmd. """ def init(self, **kwargs): defaultkwargs = { 'ip': None, 'port': 6990, 'streamname': 'Command1', 'bps': 0, 'channel': 0, 'delay': 0.001, 'ratelimiter': 0.018 } kwargs = defaultkwargs | kwargs VbanCmd.__init__(self, **kwargs) self.kind = kind self.phys_in, self.virt_in = kind.ins self.phys_out, self.virt_out = kind.outs self.strip = \ tuple(InputStrip.make((i < self.phys_in), self, i) for i in range(self.phys_in + self.virt_in)) self.bus = \ tuple(OutputBus.make((i < self.phys_out), self, i) for i in range(self.phys_out + self.virt_out)) self.command = Command.make(self) return type(f'VbanCmd{kind.name}', (VbanCmd,), { '__init__': init, }) _remotes = {kind.id: _make_remote(kind) for kind in kinds.all} def connect(kind_id: str, **kwargs): """ Connect to Voicemeeter and sets its strip layout. """ try: VBANCMD_cls = _remotes[kind_id] return VBANCMD_cls(**kwargs) except KeyError as err: raise VMCMDErrors(f'Invalid Voicemeeter kind: {kind_id}')