npm package discovery and stats viewer.

Discover Tips

  • General search

    [free text search, go nuts!]

  • Package details

    pkg:[package-name]

  • User packages

    @[username]

Sponsor

Optimize Toolset

I’ve always been into building performant and accessible sites, but lately I’ve been taking it extremely seriously. So much so that I’ve been building a tool to help me optimize and monitor the sites that I build to make sure that I’m making an attempt to offer the best experience to those who visit them. If you’re into performant, accessible and SEO friendly sites, you might like it too! You can check it out at Optimize Toolset.

About

Hi, 👋, I’m Ryan Hefner  and I built this site for me, and you! The goal of this site was to provide an easy way for me to check the stats on my npm packages, both for prioritizing issues and updates, and to give me a little kick in the pants to keep up on stuff.

As I was building it, I realized that I was actually using the tool to build the tool, and figured I might as well put this out there and hopefully others will find it to be a fast and useful way to search and browse npm packages as I have.

If you’re interested in other things I’m working on, follow me on Twitter or check out the open source projects I’ve been publishing on GitHub.

I am also working on a Twitter bot for this site to tweet the most popular, newest, random packages from npm. Please follow that account now and it will start sending out packages soon–ish.

Open Software & Tools

This site wouldn’t be possible without the immense generosity and tireless efforts from the people who make contributions to the world and share their work via open source initiatives. Thank you 🙏

© 2024 – Pkg Stats / Ryan Hefner

@alexanderolsen/port-manager

v1.2.82

Published

Abstracts the rt-midi API into a simplified list of devices. Automatically links input + output ports, and provides callbacks when available ports change.

Downloads

62

Readme

port-manager

AppVeyor Maintainability Depfu Coverage Status

Port manager simplifies interacting with MIDI devices by providing a layer of abstraction on top of the rt-midi API. Rather than interacting with individual input and output ports, pairs of input+output ports are grouped together and thought of as a single device (PortPair in code). Devices also provide convenience methods for interacting with the underlying ports.

Features

  • Automatically couple input and output ports
  • Automatically distinguishes between ports with the same name; "APC" and "APC" become "APC0" and "APC1"
  • Invokes callbacks when list of available devices changes

Installation

Install using NPM:

npm i @alexanderolsen/port-manager

or yarn:

yarn add @alexanderolsen/port-manager

Usage

const manager = require('@alexanderolsen/port-manager')

let listenerId = manager.addListener((devices) => {
  devices.forEach((device) => {
    console.log(device.id, device.name, device.hasInput, device.hasOutput);
  });
});

or

// If transpiling, you can use `import`s
import { get } from '@alexanderolsen/port-manager';

let deviceName = 'MidiDevice';
let deviceId = 'MidiDevice0'; // {deviceName}{nth device with the given name}
let device = get(deviceId);

device.send([172, 22, 1]);
device.onMessage((deltaTime, message) => {
  // do something with the message
});

device.close();

API Reference

The require'd object exposes:

/**
 * Add a callback to be invoked if the list of available MIDI ports changes.
 *
 * @param  { Function } cb The function to be invoked
 * @return { string }      The id used to remove the listener using `removeListener(id)`
 */
export function addListener(cb) {...}

/**
 * Remove the listener associated with the given id.
 *
 * @param  { string } id The id associated with the callback. Received from `addListener(cb)`
 */
export function removeListener(id) {...}

/**
 * Return a list of all of the available devices
 * @return { PortPair[] } Array of `PortPair`s
 */
export function all() {...}

/**
 * Returns the device with the given id, or null if no such device exists.
 * 
 * @param  { string }   id String formatted `{DeviceName}{nth occurrence of device (if multiple devices with same name)}`
 * @return { PortPair }    A representation of both input and output ports
 */
export function get(id) {...}

PortPair

get and all return a PortPair and a PortPair[] respectively. PortPairs can be thought of as one singular device which has the following API:

/**
 * Couples input and output ports. Each pair doesn't necessarily have to have both an input and
 * output port; pairs of (iPort && null) or (null ** oPort) may exist.
 */
class PortPair {

  /**
   * Open the input and/or output ports if not null.
   */
  open() {...}

  /**
   * Open the input and/or output ports if not null.
   */
  close() {...}

  /**
   * Send a message through the output port. If output port is null, does nothing.
   */
  send(msg) {}

  /**
   * Set a callback to be invoked when the input port receives a message. If input port is null, does nothing.
   */
  onMessage(cb) {}

  /** getters */
  get id() { ... } // `{deviceName}{occurrenceNumber}`
  get name() { ... } // device name
  get hasInput() { ... } // is input port != null?
  get hasOutput() { ... } // is output port != null?
  get occurrenceNumber() { ... } // nth device with the given name
  
}

Building From Source

git clone https://github.com/aolsenjazz/port-manager
cd port-manager
npm run build

Production files are placed in the build directory.

Examples

To run the examples:

cd examples
node notifications.js
node on-message.js

Contributing

Pull requests are welcome. For major changes, please open an issue first to discuss what you would like to change.

License

Licenses are available in LICENSE.md.