av/cmd/mjpeg-player/main.js

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JavaScript
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2020-01-24 06:48:26 +03:00
/*
NAME
main.js
AUTHOR
Trek Hopton <trek@ausocean.org>
LICENSE
This file is Copyright (C) 2019 the Australian Ocean Lab (AusOcean)
It is free software: you can redistribute it and/or modify them
under the terms of the GNU General Public License as published by the
Free Software Foundation, either version 3 of the License, or (at your
option) any later version.
It is distributed in the hope that it will be useful, but WITHOUT
ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
for more details.
You should have received a copy of the GNU General Public License in gpl.txt.
If not, see http://www.gnu.org/licenses.
*/
// play will process and play the chosen target file.
function play() {
const viewer = document.getElementById('viewer');
const input = event.target.files[0];
const reader = new FileReader();
reader.onload = event => {
const player = new Worker("player.js");
let rate = document.getElementById('rate');
if (rate.value && rate.value > 0) {
player.postMessage({ msg: "setFrameRate", data: rate.value });
}
player.onmessage = e => {
switch (e.data.msg) {
case "frame":
const blob = new Blob([new Uint8Array(e.data.data)], {
type: 'video/x-motion-jpeg'
});
const url = URL.createObjectURL(blob);
viewer.src = url;
break;
case "log":
console.log(e.data.data);
break;
case "stop":
break;
default:
console.error("unknown message from player");
break;
}
};
switch (input.name.split('.')[1]) {
case "mjpeg":
case "mjpg":
player.postMessage({ msg: "loadMjpeg", data: event.target.result }, [event.target.result]);
break;
case "ts":
player.postMessage({ msg: "loadMtsMjpeg", data: event.target.result }, [event.target.result]);
break;
default:
console.error("unknown file format");
break;
}
};
reader.onerror = error => reject(error);
reader.readAsArrayBuffer(input);
}