foobazdmx/dmx.py

import socket
import struct
import sys
from threading import Thread
from time import sleep
from typing import Union

from animation import Animation, Off, Steady, FadeTo, RotatingRainbow, Chase


def ledlog(value):
    return int(pow(float(value) / 255.0, 2) * 255)


class RGB:
    def __init__(self, dmx, slot, offset=0):
        self.dmx = dmx
        self.slot = slot
        self.offset = offset

    def rgb(self, color):
        (r, g, b) = color
        self.dmx.set(self.slot + self.offset + 0, ledlog(r))
        self.dmx.set(self.slot + self.offset + 1, ledlog(g))
        self.dmx.set(self.slot + self.offset + 2, ledlog(b))


class Bar252(RGB):
    def __init__(self, dmx, slot=1):
        super(Bar252, self).__init__(dmx, slot, 2)
        dmx.set(self.slot + 0, 81)
        dmx.set(self.slot + 1, 0)


class REDSpot18RGB(RGB):
    def __init__(self, dmx, slot=1):
        super(REDSpot18RGB, self).__init__(dmx, slot, 1)
        dmx.set(self.slot + 0, 0)


class StairvilleLedPar56(RGB):
    def __init__(self, dmx, slot=1):
        super(StairvilleLedPar56, self).__init__(dmx, slot, 0)
        dmx.set(self.slot + 3, 0)
        dmx.set(self.slot + 4, 0)
        dmx.set(self.slot + 5, 0)
        dmx.set(self.slot + 6, 255)


class DMX:
    def __init__(self, host, port=0x1936, universe=1, maxchan=512):
        self._host = host
        self._port = port
        self._universe = universe
        self._socket = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)  # UDP
        self._socket.setblocking(False)
        self._data = bytearray(maxchan)
        packet = bytearray()
        packet.extend(map(ord, "Art-Net"))
        packet.append(0x00)  # Null terminate Art-Net
        packet.extend([0x00, 0x50])  # Opcode ArtDMX 0x5000 (Little endian)
        packet.extend([0x00, 0x0e])  # Protocol version 14
        self._header = packet
        self._sequence = 1
        self._color = (0, 0, 0)
        self._animation = FadeTo((255, 255, 255))
        self._rgbs = []
        self._thread = None
        self._updating = False

    def start(self):
        if self._thread and self._thread.is_alive():
            return
        self._thread = Thread(daemon=True, target=self.background)
        self._updating = True
        self._thread.start()

    def background(self):
        while self._updating:
            self.update()
            # print("updating")
            # print(self.data)
            # break
            sleep(1.0 / 30)

    def update(self):
        if not self._animation:
            return

        for i in range(0, len(self._rgbs)):
            self._rgbs[i].rgb(self._animation.update(i, len(self._rgbs)))

        packet = self._header[:]
        packet.append(self._sequence)  # Sequence,
        packet.append(0x00)  # Physical
        packet.append(self._universe & 0xFF)  # Universe LowByte
        packet.append(self._universe >> 8 & 0xFF)  # Universe HighByte

        packet.extend(struct.pack('>h', len(self._data)))  # Pack the number of channels Big endian
        packet.extend(self._data)
        self._socket.sendto(packet, (self._host, self._port))
        # print(f"sent {len(packet)} bytes, {threading.get_native_id()}")

        self._sequence += 1
        if self._sequence > 255:
            self._sequence = 1

    def set(self, slot, value):
        self._data[slot - 1] = value

    @property
    def animation(self) -> str:
        return self._animation.name()

    @animation.setter
    def animation(self, animation: Union[Animation, str]):
        if isinstance(animation, str):
            if animation == "off":
                animation = Off()
            elif animation == "chase":
                animation = Chase(self._color)
            elif animation == "fade":
                animation = FadeTo(self._color)
            elif animation == "rainbow":
                animation = RotatingRainbow()
            elif animation == "steady":
                animation = Steady(self._color)
            else:
                raise ValueError(f"No such animation {animation}")
        self._animation = animation
        if  isinstance(animation, Off):
            self._updating = False
            if self._thread and self._thread.is_alive():
                self._thread.join()
            # one frame black
            self._animation = Steady((0, 0, 0))
            self.update()
            self._animation = Off()
        else:
            self.start()
        print(f"Animation: {animation}", file=sys.stderr)

    @property
    def color(self):
        return self._color

    @color.setter
    def color(self, color):
        if self._color != color:
            self._color = color
            self.animation = self.animation