Add the Play Media operation and place it under a new "Multimedia" category. Move the Render Image to this new category as well.

This commit is contained in:
Anthony Arnold 2018-12-20 00:05:10 +10:00
parent 8ab56a29ac
commit 866dd546c8
4 changed files with 152 additions and 1 deletions

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@ -341,6 +341,13 @@
"From MessagePack"
]
},
{
"name": "Multimedia",
"ops": [
"Render Image",
"Play Media"
]
},
{
"name": "Other",
"ops": [
@ -355,7 +362,6 @@
"Generate TOTP",
"Generate HOTP",
"Haversine distance",
"Render Image",
"Remove EXIF",
"Extract EXIF",
"Numberwang",

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@ -0,0 +1,101 @@
/**
* @author anthony-arnold [anthony.arnold@uqconnect.edu.au]
* @copyright Crown Copyright 2018
* @license Apache-2.0
*/
import { fromBase64, toBase64 } from "../lib/Base64";
import { fromHex } from "../lib/Hex";
import Operation from "../Operation";
import OperationError from "../errors/OperationError";
import Utils from "../Utils";
import Magic from "../lib/Magic";
/**
* PlayMedia operation
*/
class PlayMedia extends Operation {
/**
* PlayMedia constructor
*/
constructor() {
super();
this.name = "Play Media";
this.module = "Media";
this.description = "Plays the input as sound or video depending on the type.";
this.infoURL = "";
this.inputType = "string";
this.outputType = "byteArray";
this.presentType = "html";
this.args = [
{
"name": "Input format",
"type": "option",
"value": ["Raw", "Base64", "Hex"]
}
];
}
/**
* @param {string} input
* @param {Object[]} args
* @returns {byteArray} The multimedia data as bytes.
*/
run(input, args) {
const inputFormat = args[0];
if (!input.length) return [];
// Convert input to raw bytes
switch (inputFormat) {
case "Hex":
input = fromHex(input);
break;
case "Base64":
// Don't trust the Base64 entered by the user.
// Unwrap it first, then re-encode later.
input = fromBase64(input, undefined, "byteArray");
break;
case "Raw":
default:
input = Utils.strToByteArray(input);
break;
}
// Determine file type
const type = Magic.magicFileType(input);
if (!(type && /^audio|video/.test(type.mime))) {
throw new OperationError("Invalid file type");
}
return input;
}
/**
* Displays an audio or video element that may be able to play the media
* file.
* @param data {byteArray} Data containing an audio or video file.
* @returns {string} Markup to display a media player.
*/
async present(data) {
if (!data.length) return "";
const type = Magic.magicFileType(data);
const matches = /^audio|video/.exec(type.mime);
if (!matches) {
throw new OperationError("Invalid file type");
}
const dataURI = `data:${type.mime};base64,${toBase64(data)}`;
const element = matches[0];
let html = `<${element} src='${dataURI}' type='${type.mime}' controls>`;
html += "<p>Unsupported media type.</p>";
html += `</${element}>`;
return html;
}
}
export default PlayMedia;

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@ -80,6 +80,7 @@ import "./tests/operations/ToGeohash.mjs";
import "./tests/operations/TranslateDateTimeFormat";
import "./tests/operations/Magic";
import "./tests/operations/ParseTLV";
import "./tests/operations/Media";
let allTestsPassing = true;
const testStatusCounts = {

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