blockly-field-player

A Blockly audio player field.

About

Audio player capabilities right from the Google Blockly Field.

• Interactive audio visualization using Web Audio and Canvas based on wavesurfer.js
• Public API: load(), unload(), play(), pause(), stop()
• Player state change events
• Audio source cache
• Audio source autoload
• XHR fetch with credentials
• Color scheme configuration

Installation

npm

npm install --save blockly-field-player

yarn

yarn add blockly-field-player

Build

npm run build

or

yarn build

Usage

JavaScript

import * as Blockly from 'blockly'
import {FieldPlayer} from 'blockly-field-player'

Blockly.Blocks['test_field'] = {
  init: function () {
    this.appendDummyInput()
      .appendField(new FieldPlayer('http://localhost/test.mp3'), 'FIELDNAME')
  }
};

JSON

import * as Blockly from 'blockly'
import 'blockly-field-text-box'

Blockly.defineBlocksWithJsonArray([
    {
        "type": "test_field",
        "message0": "%1",
        "args0": [
            {
                "type": "field_player",
                "name": "FIELDNAME",
                "src": "http://localhost/test.mp3"
            }
        ]
    }])

Run in browser

<script src="./dist/index.js"></script>

note: you need to build the package first.

Configuration

You can provide options object:

Blockly.defineBlocksWithJsonArray([
    {
        "type": "test_field",
        "message0": "%1",
        "args0": [
            {
                "type": "field_player",
                "name": "FIELDNAME",
                "src": "http://localhost/test.mp3",
                "options": {
                    primaryColor: '#DEA922',
                    secondaryColor: '#E2D0A7',
                    backgroundColor: '#FCF3D8'
                }
            }
        ]
    }])

Options list

• primaryColor
• secondaryColor
• backgroundColor
• autoLoad (see notes about Autoload option)

Events

You can listen for various of player state events, such as:

• notloaded
• readytoload
• unloaded
• loading
• loaded
• playing
• paused
• error

Just subscribe to state events from the player instance:

Blockly.Blocks['test_field'] = {
  init: function () {
      const player = new FieldPlayer('http://localhost/test.mp3')
      player.on('state', state => console.debug(state))
      this.appendDummyInput().appendField(player, 'FIELDNAME')
  }
};

Autoload

By default, even if media source is provided, player will not load it automatically. If you want to change this behaviour and load media to cache during field render, set autoLoad option to true.

const player = new FieldPlayer('http://localhost/test.mp3', { autoLoad: true })

License

Apache 2.0