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mixer.js
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mixer.js
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import { InstanceStatus } from '@companion-module/base'
import * as net from 'net'
import {
dbValues,
delay,
hexToByteArray,
levelMatrixInputs,
levelMatrixOutputs,
muteParameters,
panMatrix,
panValues,
} from './helpers.js'
export class Mixer {
constructor(instanceContext, ip, port, autoReconnect) {
this.ip = ip
this.port = port
this.autoReconnect = autoReconnect
this.tcpClient = null
this.reconnectInterval = null
this.currentScene = null
this.instanceContext = instanceContext
}
connect() {
this.instanceContext.updateStatus(InstanceStatus.Connecting)
this.tcpClient = new net.Socket()
this.tcpClient.setKeepAlive(true)
this.tcpClient.connect(this.port, this.host, () => {
this.instanceContext.updateStatus(InstanceStatus.Ok)
console.info('Connected to mixer!')
this.fetchAllMuteStatuses()
if (this.reconnectInterval) {
clearInterval(this.reconnectInterval)
this.reconnectInterval = null
}
})
this.tcpClient.on('error', (err) => {
console.error('TCP connection error:', err)
this.instanceContext.updateStatus(InstanceStatus.ConnectionFailure, err.message)
// Trigger reconnect if auto reconnect is enabled
this.setupReconnect()
})
this.tcpClient.on('close', () => {
console.log('Connection closed')
this.instanceContext.updateStatus(InstanceStatus.Disconnected)
this.setupReconnect()
})
this.tcpClient.on('data', (data) => {
let hexMessage = data.toString('hex')
this.parseIncomingMessages(hexMessage)
})
}
destroy() {
if (this.tcpClient) {
this.tcpClient.end()
this.tcpClient.destroy()
this.tcpClient.removeAllListeners()
this.instanceContext.updateStatus(InstanceStatus.Disconnected)
this.tcpClient = null
if (this.reconnectInterval) {
clearInterval(this.reconnectInterval)
this.reconnectInterval = null
}
}
}
setupReconnect() {
if (this.autoReconnect && !this.reconnectInterval) {
this.reconnectInterval = setInterval(() => {
console.log('Attempting to reconnect...')
this.connect()
}, 5000)
}
}
async fetchAllMuteStatuses() {
for (let i = 0; i < muteParameters.length; i++) {
const { msb, lsb } = muteParameters[i]
const midiMessage = [0xb0, 0x63, parseInt(msb, 16), 0xb0, 0x62, parseInt(lsb, 16), 0xb0, 0x60, 0x7f]
this.sendMIDIMessage(midiMessage)
await delay(50)
}
}
findNearestDBLabel(vc, vf) {
const data = (vc << 7) | vf // Calculate the input value
let nearest = null // To hold the nearest value
let nearestDistance = Infinity // To track the smallest distance
// Iterate over the dbValues array
dbValues.forEach((entry) => {
// Convert VC and VF from hexadecimal strings to integers
const vcValue = parseInt(entry.VC, 16)
const vfValue = parseInt(entry.VF, 16)
// Calculate the combined value
const entryValue = (vcValue << 7) | vfValue
// Calculate the distance from the input value
const distance = Math.abs(data - entryValue)
// Check if this entry is closer than the previous nearest
if (distance < nearestDistance) {
nearestDistance = distance
nearest = entry // Store the nearest entry
}
})
return nearest // Return the nearest db value entry
}
findNearestPanLabel(vc, vf) {
const data = (vc << 7) | vf // Calculate the input value
let nearest = null // To hold the nearest value
let nearestDistance = Infinity // To track the smallest distance
// Iterate over the dbValues array
panValues.forEach((entry) => {
// Convert VC and VF from hexadecimal strings to integers
const vcValue = parseInt(entry.VC, 16)
const vfValue = parseInt(entry.VF, 16)
// Calculate the combined value
const entryValue = (vcValue << 7) | vfValue
// Calculate the distance from the input value
const distance = Math.abs(data - entryValue)
// Check if this entry is closer than the previous nearest
if (distance < nearestDistance) {
nearestDistance = distance
nearest = entry // Store the nearest entry
}
})
return nearest // Return the nearest pan value entry
}
parseIncomingMessages(hexMessage) {
console.info('Received package. Data (hex): ', hexMessage)
const byteArray = hexToByteArray(hexMessage)
let i = 0
while (i < byteArray.length) {
// Check for a Scene Change packet (5 bytes)
if (
byteArray[i] === 0xb0 &&
byteArray[i + 1] === 0x00 &&
byteArray[i + 2] === 0x00 &&
byteArray[i + 3] === 0xc0
) {
const scenePacket = byteArray.slice(i, i + 5)
this.handleIncomingMessage(scenePacket)
i += 5 // Move past this scene change packet
}
// Check for a Mute Status packet (12 bytes sequence)
else if (
byteArray[i] === 0xb0 &&
byteArray[i + 1] === 0x63 && // MSB Header
byteArray[i + 3] === 0xb0 &&
byteArray[i + 4] === 0x62 && // LSB Header
byteArray[i + 6] === 0xb0 &&
byteArray[i + 7] === 0x06 && // Value 1 Header
byteArray[i + 9] === 0xb0 &&
byteArray[i + 10] === 0x26
) {
// Value 2 Header
const mutePacket = byteArray.slice(i, i + 12)
this.handleIncomingMessage(mutePacket)
i += 12 // Move past this mute status packet
}
// If no known pattern found, log the unknown part and move forward
else {
console.info('Could not parse message - unknown format. Skipping one byte and trying again.')
i++ // Skip one byte and try to parse from the next one
}
}
}
handleIncomingMessage(byteArray) {
// Handle Scene Change
if (byteArray.length === 5) {
if (byteArray[0] == 0xb0 && byteArray[1] == 0x00 && byteArray[2] == 0x00 && byteArray[3] == 0xc0) {
this.currentScene = byteArray[4] + 1
this.instanceContext.setVariableValues({ activeScene: this.currentScene })
this.instanceContext.checkFeedbacks('sceneActive')
}
}
// Handle Parameter Status Messages (Mute, Volume, Pan)
else if (byteArray.length === 12) {
const msb = byteArray[2]
const lsb = byteArray[5]
const valueCoarse = byteArray[8]
const valueFine = byteArray[11]
// Handle Mute Packets (MSB: 0x00 to 0x04)
if (msb >= 0x00 && msb <= 0x04) {
const parameter = muteParameters.find(
(param) =>
param.msb === msb.toString(16).padStart(2, '0').toUpperCase() &&
param.lsb === lsb.toString(16).padStart(2, '0').toUpperCase()
)
if (parameter) {
const muteState = byteArray[11]
parameter.state = muteState === 1
this.instanceContext.setVariableValues({ [`mute_${parameter.label}`]: parameter.state })
this.instanceContext.checkFeedbacks('mute')
}
}
// Handle Volume Packets - Inputs and FX to Outputs and FX
else if (msb >= 0x40 && msb <= 0x4e) {
const parameter = levelMatrixInputs.find((param) =>
Object.values(param).some(
(target) =>
target.msb === msb.toString(16).padStart(2, '0').toUpperCase() &&
target.lsb === lsb.toString(16).padStart(2, '0').toUpperCase()
)
)
if (parameter) {
const target = Object.keys(parameter).find(
(key) =>
parameter[key].msb === msb.toString(16).padStart(2, '0').toUpperCase() &&
parameter[key].lsb === lsb.toString(16).padStart(2, '0').toUpperCase()
)
const nearestLabel = this.findNearestDBLabel(valueCoarse, valueFine)
if (target) {
this.instanceContext.setVariableValues({
[`volume_${parameter.label}_${target}`]: nearestLabel.label,
})
console.log(`Received level for ${parameter.label} ${target}:`, nearestLabel.label, 'dB')
} else {
console.log('Did not find volume target.')
}
}
}
// Handle Volume Packets - Outputs, FX unit inputs, and DCAs
else if (msb == 0x4f) {
const parameter = levelMatrixOutputs.find(
(param) =>
param.msb === msb.toString(16).padStart(2, '0').toUpperCase() &&
param.lsb === lsb.toString(16).padStart(2, '0').toUpperCase()
)
if (parameter) {
const nearestLabel = this.findNearestDBLabel(valueCoarse, valueFine)
if (nearestLabel) {
this.instanceContext.setVariableValues({ [`volume_${parameter.label}`]: nearestLabel.label })
console.log(`Received level for ${parameter.label}:`, nearestLabel.label, 'dB')
} else {
console.log('Did not find volume label or volume target.')
}
}
}
// Handle Pan Packets (MSB: 0x50 to 0x56)
else if (msb >= 0x50 && msb <= 0x56) {
const parameter = panMatrix.find((param) =>
Object.values(param).some(
(target) =>
target.msb === msb.toString(16).padStart(2, '0').toUpperCase() &&
target.lsb === lsb.toString(16).padStart(2, '0').toUpperCase()
)
)
if (parameter) {
// Identify the specific target (e.g., toLR, toOut12, etc.)
const target = Object.keys(parameter).find(
(key) =>
parameter[key].msb === msb.toString(16).padStart(2, '0').toUpperCase() &&
parameter[key].lsb === lsb.toString(16).padStart(2, '0').toUpperCase()
)
const nearestLabel = this.findNearestPanLabel(valueCoarse, valueFine)
if (nearestLabel && target) {
// Set the pan value for the identified channel and target
this.instanceContext.setVariableValues({ [`pan_${parameter.label}_${target}`]: nearestLabel.label })
// Log and update feedback for the pan control
console.log(`Pan level for ${parameter.label} ${target}:`, nearestLabel.label)
this.instanceContext.checkFeedbacks('pan')
} else {
console.log('Did not find pan value label or pan target.')
}
}
}
} else {
console.log(
'Received unknown package. Data (hex): ',
byteArray.map((byte) => byte.toString(16).padStart(2, '0')).join(' ')
)
}
}
setMuteStatus(msb, lsb, muteState) {
var message = [0xb0, 0x63, parseInt(msb, 16), 0xb0, 0x62, parseInt(lsb, 16)]
switch (muteState) {
case 'mute':
message.push(0xb0, 0x06, 0x00, 0xb0, 0x26, 0x01)
break
case 'unmute':
message.push(0xb0, 0x06, 0x00, 0xb0, 0x26, 0x00)
break
case 'toggle':
message.push(0xb0, 0x60, 0x00)
break
}
this.sendMIDIMessage(message)
}
setAbsValue(msb, lsb, vc, vf) {
const message = [
0xb0,
0x63,
parseInt(msb, 16),
0xb0,
0x62,
parseInt(lsb, 16),
0xb0,
0x06,
parseInt(vc, 16),
0xb0,
0x26,
parseInt(vf, 16),
]
this.sendMIDIMessage(message)
this.sendMIDIGetMessage(msb, lsb)
}
setRelValue(msb, lsb, direction) {
const message = [
0xb0,
0x63,
parseInt(msb, 16),
0xb0,
0x62,
parseInt(lsb, 16),
0xb0,
direction == 'left' || direction == 'decrement' ? 0x61 : 0x60,
0x00,
]
this.sendMIDIMessage(message)
this.sendMIDIGetMessage(msb, lsb)
}
loadScene(scene) {
const midiMessage = [0xb0, 0x00, 0x00, 0xc0, scene - 1]
this.sendMIDIMessage(midiMessage)
}
controlSoftKey(key, state) {
const midiMessage = [state == 'press' ? 0x90 : 0x80, parseInt(key, 16), state == 'press' ? 0x7f : 0x00]
this.sendMIDIMessage(midiMessage)
}
sendMIDIMessage(hexMessage) {
if (!this.tcpClient || this.tcpClient.destroyed) {
console.log('warning', 'TCP connection is closed!')
return
}
let buffer = Buffer.from(hexMessage, 'hex')
this.tcpClient.write(buffer)
}
sendMIDIGetMessage(msb, lsb) {
const midiMessage = [0xb0, 0x63, parseInt(msb, 16), 0xb0, 0x62, parseInt(lsb, 16), 0xb0, 0x60, 0x7f]
this.sendMIDIMessage(midiMessage)
}
}