88 lines
2.6 KiB
JavaScript
88 lines
2.6 KiB
JavaScript
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/*
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* Copyright © 2020 Luciano Iam <lucianito@gmail.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License along
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* with this program; if not, write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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import { RootComponent } from '../base/component.js';
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import { StateNode } from '../base/protocol.js';
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import { Strip } from './strip.js';
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export class Mixer extends RootComponent {
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constructor (channel) {
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super(channel);
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this._strips = {};
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this._ready = false;
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}
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get ready () {
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return this._ready;
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}
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get strips () {
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return Object.values(this._strips);
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}
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getStripByName (name) {
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name = name.trim().toLowerCase();
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return this.strips.find(strip => strip.name.trim().toLowerCase() == name);
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}
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handle (node, addr, val) {
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if (node.startsWith('strip')) {
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if (node == StateNode.STRIP_DESCRIPTION) {
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this._strips[addr] = new Strip(this, addr, val);
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this.notifyObservers('strips');
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} else {
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const stripAddr = [addr[0]];
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if (stripAddr in this._strips) {
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this._strips[stripAddr].handle(node, addr, val);
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} else {
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return false;
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}
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}
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return true;
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}
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/*
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RECORD_STATE signals all mixer initial state has been sent because
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it is the last message to arrive immediately after client connection,
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see WebsocketsDispatcher::update_all_nodes() in dispatcher.cc
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For this to work the mixer component needs to receive incoming
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messages before the transport component, otherwise the latter would
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consume RECORD_STATE.
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Some ideas for a better implementation of mixer readiness detection:
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- Implement message bundles like OSC to pack all initial state
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updates into a single unit
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- Move *_DESCRIPTION messages to single message with val={JSON data},
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currently val only supports primitive data types
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- Append a termination or mixer ready message in update_all_nodes(),
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easiest but the least elegant
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*/
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if (!this._ready && (node == StateNode.RECORD_STATE)) {
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this.updateLocal('ready', true);
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}
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return false;
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}
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}
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