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<html>
<head>
<title>Steinar-style Videostream</title>
<link rel="stylesheet" href="reset.css" type="text/css" media="screen"/>
<link rel="stylesheet" href="style.css" type="text/css" media="screen"/>
<link rel="stylesheet" href="media-queries.css" type="text/css" media="screen"/>
<meta name="viewport" content="width=device-width, initial-scale=1" />
</head>
<body>
<style>
#videowrapper {
margin-top: 0.5em;
margin-left: auto;
margin-right: auto;
position: relative;
}
#video {
max-height: 100%;
max-width: 100%;
width: auto;
border: 1px solid black;
}
#loader {
width: 100%;
display: none;
background: black;
border: 1px solid black;
}
#castposter {
width: 100%;
display: none;
background: black;
border: 1px solid black;
}
#castposteri {
margin-top: 0;
margin-bottom: 0;
position: relative;
}
#castposteri:after {
padding-top: 56.25%; /* 16:9 aspect */
display: block;
content: '';
}
#castposterii {
position: absolute; top: 0; bottom: 0; left: 0; right: 0;
display: flex;
flex-direction: column;
justify-content: center;
}
#castposteriii {
color: white;
}
#castposteriii p { margin-bottom: 0; }
#streamchoice {
margin-bottom: 0;
}
</style>
<p id="streamchoice"></p>
<div id="videowrapper">
<canvas id="loader"></canvas>
<div id="castposter"><div id="castposteri"><div id="castposterii"><div id="castposteriii"><p id="nowcasting">Now casting to <strong id="casttarget"></strong></p><p><a href="javascript:stop_casting();">Stop casting</a></p></div></div></div></div>
<video controls="controls" id="video" preload="none">
<source src="http://cubemap.tg16.gathering.org/event.mp4" type="video/mp4">
</video>
</div>
<p style="margin-top: 1em; margin-bottom: 0">For use with a non-web player (e.g. VLC), use
<a id="vlcurl"></a> (MP4) or <a id="vlchlsurl"></a> (HLS).
Also <a href="https://chrome.google.com/webstore/detail/google-cast/boadgeojelhgndaghljhdicfkmllpafd" id="casturl">Google Cast</a> enabled.</p>
<script type="text/javascript" src="https://www.gstatic.com/cv/js/sender/v1/cast_sender.js"></script>
<script>
<!--
// CONFIG
var global_title = 'Scenesat live stream';
var enable_loader = false;
var streams = [
{
name: "720p (2.0 Mbit/sec)",
url: "http://cubemap.tg16.gathering.org/event.mp4",
hlsurl: "http://stream.tg16.gathering.org/hls/event.m3u8",
width: 1280,
height: 720
},
];
// GLOBALS
var video = document.getElementById('video');
var loader = document.getElementById('loader');
var castposter = document.getElementById('castposter');
var use_hls;
// LOADER PICTURE
// C64 font. Yes, mixing up Amiga and C64 is a sin, I know.
var text = [
' xx xxxx xx xxxx xxxx xx xx xxxx ',
' xx xx xx xxxx xx xx xx xxx xx xx xx ',
' xx xx xx xx xx xx xx xx xxxxxx xx ',
' xx xx xx xxxxxx xx xx xx xxxxxx xx xxx ',
' xx xx xx xx xx xx xx xx xx xxx xx xx ',
' xx xx xx xx xx xx xx xx xx xx xx xx xx xx xx ',
' xxxxxx xxxx xx xx xxxx xxxx xx xx xxxx xx xx xx '
];
function raster() {
var ctx = loader.getContext("2d");
var width = 352; // overscan
var height = 288; // overscan
var border_width = 18; // really 16
var border_height = 24; // really 16
var scalefac_w = loader.width/width;
var scalefac_h = loader.height/height;
for (var y = 0; y < height; ++y) {
var r = Math.round(Math.random() * 16).toString(16);
var g = Math.round(Math.random() * 16).toString(16);
var b = Math.round(Math.random() * 16).toString(16);
ctx.fillStyle = '#' + r + r + g + g + b + b;
var start_y = Math.round(y * scalefac_h);
var next_y = Math.round((y + 1) * scalefac_h);
if (y < border_height || y >= height-border_height) {
ctx.fillRect(0, start_y, loader.width, next_y - start_y);
} else {
ctx.fillRect(0, start_y, border_width * scalefac_w, next_y - start_y);
ctx.fillRect((width - border_width) * scalefac_w, start_y, border_width * scalefac_w, next_y - start_y);
}
}
// Use the same scalefactor to get square pixels despite the changed aspect.
var scalefac_ch = Math.round(scalefac_h);
if (scalefac_ch < 1) scalefac_ch = 1;
var offset_y = Math.round(loader.height / 2 - text.length * scalefac_ch / 2);
var offset_x = Math.round(loader.width / 2 - text[0].length * scalefac_ch / 2);
ctx.fillStyle = '#ffffff';
for (var line = 0; line < text.length; ++line) {
var start_y = Math.round(line * scalefac_ch) + offset_y;
for (var ch = 0; ch < text[line].length; ++ch) {
if (text[line].substr(ch, 1) === ' ') {
continue;
}
var start_x = Math.round(ch * scalefac_ch) + offset_x;
ctx.fillRect(start_x, start_y, scalefac_ch, scalefac_ch);
}
}
}
var loader_interval = null;
function start_loader() {
if (!enable_loader) return;
if (video.readyState === 4) {
// No need to show a loader screen. This can happen because we call start_loader()
// on the 'play' event, but we could already have enough buffering (especially on
// mobile, where the play event is delayed), so we'd never get the 'canplay' event.
console.log("Not starting loader screen, already enough to play");
return;
}
console.log("STARTING LOADER SCREEN");
var ctx = loader.getContext("2d");
ctx.clearRect(0, 0, loader.width, loader.height);
loader_interval = setInterval(raster, 1000/20); // 20 fps ought to be enough for anyone
loader.style.display = 'inline';
video.style.display = 'none';
castposter.style.display = 'none';
}
function stop_loader() {
if (!enable_loader) return;
console.log("STOPPING LOADER SCREEN");
clearInterval(loader_interval);
if (castposter.style.display !== 'block') {
loader.style.display = 'none';
video.style.display = 'inline';
castposter.style.display = 'none';
}
}
// GOOGLE CAST
var current_media;
var session;
function show_castposter() {
stop_loader();
castposter.style.display = 'block';
loader.style.display = 'none';
video.style.display = 'none';
}
function hide_castposter() {
castposter.style.display = 'none';
loader.style.display = 'none';
video.style.display = 'inline';
}
function stop_casting() {
hide_castposter();
if (current_media) {
var media = current_media;
current_media = null;
media.stop();
}
if (session) {
session.stop();
session = null;
}
}
function cast_current_video() {
if (session === undefined || selected_stream === undefined) {
return;
}
var title = streams[selected_stream].name;
var url = streams[selected_stream].url;
document.getElementById('casttarget').textContent = session.receiver.friendlyName;
show_castposter();
video.pause();
// If we are already casting this, do nothing.
if (current_media && current_media.media.contentId === url) {
console.log("Already casting " + url + " to " + session.receiver.friendlyName + " (" + current_media.playerState + ")");
return;
}
if (current_media) {
current_media = null; // Signal to on_media_status_update.
}
var media_info = new chrome.cast.media.MediaInfo(url, "video/mp4");
media_info.metadata = new chrome.cast.media.GenericMediaMetadata();
media_info.metadata.title = global_title; // + ': ' + title;
var request = new chrome.cast.media.LoadRequest(media_info);
session.loadMedia(request,
on_media_discovered.bind(this, 'loadMedia'),
on_media_error);
}
function on_media_status_update(active) {
console.log("media status update: " + active);
if (current_media !== null && !active) { // If current_media is null, we intended to stop it, so don't bother.
console.log("Unexpected end, quitting.");
stop_casting();
}
}
function on_media_discovered(how, media) {
console.log("media discovered, how: " + how);
console.log(media);
current_media = media;
cast_current_video();
media.addUpdateListener(on_media_status_update);
}
function on_media_error(e) {
console.log("media error:");
console.log(e);
}
function on_session_status_update(active) {
console.log("session status update: " + active);
if (!active) {
stop_casting();
}
}
function session_listener(e) {
session = e;
if (session.media.length != 0) {
on_media_discovered('onRequestSessionSuccess', session.media[0]);
}
session.addUpdateListener(on_session_status_update);
cast_current_video();
}
function receiver_listener(e) {
// console.log("receiver status: " + e);
}
function on_cast_init_success() {
document.getElementById('casturl').href = "javascript:chrome.cast.requestSession(session_listener)";
}
function on_cast_init_error() {
console.log("google cast init error");
}
var initialize_cast_api = function() {
var session_request = new chrome.cast.SessionRequest(
chrome.cast.media.DEFAULT_MEDIA_RECEIVER_APP_ID);
var api_config = new chrome.cast.ApiConfig(
session_request,
session_listener,
receiver_listener);
chrome.cast.initialize(api_config, on_cast_init_success, on_cast_init_error);
};
window['__onGCastApiAvailable'] = function(loaded, error_info) {
if (loaded) {
initialize_cast_api();
} else {
console.log(error_info);
}
}
// ACTUAL VIDEO STUFF
if (navigator.userAgent.match(/iPad|iPhone|iPod/)) {
// iOS claims to support video/mp4, but it doesn't work for these streams.
// They play the HLS fine, though.
use_hls = true;
} else if (navigator.userAgent.match(/Safari/) && !navigator.userAgent.match(/Chrome/)) {
// Same with Safari (on OS X; not on Windows, but who cares about Safari on Windows).
use_hls = true;
} else if (video.canPlayType('video/mp4') === '' && video.canPlayType('application/vnd.apple.mpegURL') !== '') {
// Explicitly no MP4 support, but HLS support.
use_hls = true;
} else {
// Default to the normal stream (less latency, less muxer overhead).
use_hls = false;
}
var selected_stream;
function update_stream_list() {
var stream_html = "";
for (var i = 0; i < streams.length; ++i) {
if (i != 0) {
stream_html += " | ";
}
if (i == selected_stream) {
stream_html += "<strong>" + streams[i].name + "</strong>";
} else {
stream_html += "<a href=\"javascript:select_stream(" + i + ")\">" + streams[i].name + "</a>";
}
}
document.getElementById('streamchoice').innerHTML = stream_html;
}
function select_stream(s) {
selected_stream = s;
update_stream_list();
var vlcurl = document.getElementById('vlcurl');
vlcurl.href = streams[s].url;
vlcurl.innerHTML = streams[s].url;
var vlchlsurl = document.getElementById('vlchlsurl');
vlchlsurl.href = streams[s].hlsurl;
vlchlsurl.innerHTML = streams[s].hlsurl;
var videowrapper = document.getElementById('videowrapper');
var video = document.getElementById('video');
var url = streams[s].url;
if (use_hls && streams[s].hlsurl) {
url = streams[s].hlsurl;
}
loader.width = streams[s].width;
loader.height = streams[s].height;
loader.style.maxWidth = streams[s].width + "px";
loader.style.maxHeight = streams[s].height + "px";
castposter.style.maxWidth = streams[s].width + "px";
castposter.style.maxHeight = streams[s].height + "px";
videowrapper.style.maxWidth = streams[s].width + "px";
videowrapper.style.maxHeight = streams[s].height + "px";
if (session) {
cast_current_video();
} else {
video.src = url;
video.load();
video.play();
}
}
function setup_listeners() {
video.addEventListener('pause', on_pause);
video.addEventListener('play', start_loader);
video.addEventListener('canplay', stop_loader);
video.addEventListener('error', stop_loader);
}
var on_pause;
on_pause = function(e) {
// The only real way to make it reload without buffering up
// the current content.
video.outerHTML = video.outerHTML;
video = document.getElementById('video');
setup_listeners(); // Since we have a new object.
stop_loader();
};
setup_listeners();
select_stream(0);
//alert("MP4: " + video.canPlayType('video/mp4') + "; HLS: " + video.canPlayType('application/vnd.apple.mpegURL'));
-->
</script>
|
