|
|
@@ -0,0 +1,102 @@
|
|
|
+/**
|
|
|
+ * @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 = "Default";
|
|
|
+ this.description = "Plays the input as audio or video depending on the type.<br><br>Tags: sound, movie, mp3, mp4, mov, webm, wav, ogg";
|
|
|
+ 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;
|
|
|
+
|
|
|
+ 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 or unrecognised 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;
|
n1474335