add decoder for spot

src/decoders/index.ts

@@ -1,4 +1,5 @@
 import ChannelBlock from './lighting/channel-block';
+import Spot from './lighting/spot';
 import CentroidAccelVelocity from './motion/centroid-accel-velocity';
 import CentroidPosition from './motion/centroid-position';
 import OrientationEuler from './motion/orientation-euler';
@@ -23,5 +24,6 @@ export const Decoders = {
   OrientationEuler,
   ZoneCollisionDetection,
   ZoneObject,
+  Spot,
   ChannelBlock,
 };

src/decoders/lighting/spot.ts

@@ -0,0 +1,44 @@
+import { Decoders } from '..';
+import { ChannelBlock, Spot } from '../../models';
+
+export default (bytes: Uint8Array, isLittleEndian: boolean = false): Spot => {
+  const view = new DataView(bytes.buffer, bytes.byteOffset, bytes.byteLength);
+
+  let dataOffset = 0;
+  const type = view.getUint8(dataOffset);
+  dataOffset += 1;
+  if (type !== 0x0a) {
+    throw new Error('Spot module must have a type of 0x0a');
+  }
+
+  const size = view.getUint16(dataOffset, isLittleEndian);
+  dataOffset += 2;
+  if (size !== bytes.byteLength) {
+    throw new Error('Spot module size mismatch');
+  }
+  const id = view.getUint16(dataOffset, isLittleEndian);
+  dataOffset += 2;
+  const offset = view.getUint16(dataOffset, isLittleEndian);
+  dataOffset += 2;
+  const numberOfChannelBlocks = view.getUint16(dataOffset, isLittleEndian);
+  dataOffset += 2;
+
+  const channelBlocks: ChannelBlock[] = [];
+  let zoneObjectOffset = dataOffset;
+
+  for (let index = 0; index < numberOfChannelBlocks; index++) {
+    const channelBlockData = bytes.subarray(zoneObjectOffset, zoneObjectOffset + 5);
+    console.log(channelBlockData);
+    const channelBlock = Decoders.ChannelBlock(channelBlockData);
+    channelBlocks.push(channelBlock);
+    zoneObjectOffset += channelBlockData.byteLength;
+  }
+  return {
+    type,
+    size,
+    id,
+    offset,
+    numberOfChannelBlocks,
+    channelBlocks,
+  };
+};

src/models.ts

@@ -115,6 +115,15 @@ export type ZoneObject = {
   name: string;
 };
 
+export type Spot = {
+  type: number;
+  size: number;
+  id: number;
+  offset: number;
+  numberOfChannelBlocks: number;
+  channelBlocks: ChannelBlock[];
+};
+
 export type ChannelBlock = {
   offset: number;
   fade: number;