/
cropped-screen-sharing.html
executable file
·279 lines (233 loc) · 9 KB
/
cropped-screen-sharing.html
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
<!DOCTYPE html>
<html>
<head>
<script>
if(!location.hash.replace('#', '').length) {
location.href = location.href.split('#')[0] + '#' + (Math.random() * 100).toString().replace('.', '');
location.reload();
}
</script>
<title>WebRTC Cropped Screen Sharing using RTCMultiConnection</title>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0, user-scalable=no">
<link rel="author" type="text/html" href="https://plus.google.com/+MuazKhan">
<meta name="author" content="Muaz Khan">
<meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1">
<script src="https://cdn.webrtc-experiment.com/socket.io.js"></script>
<script src="https://webrtc.github.io/adapter/adapter-latest.js"></script>
<script src="https://cdn.webrtc-experiment.com/CodecsHandler.js"></script>
<script src="https://cdn.webrtc-experiment.com/IceServersHandler.js"></script>
<script src="https://cdn.webrtc-experiment.com/RTCMultiConnection.js"></script>
</head>
<body>
<h1>WebRTC Cropped Screen Sharing using <a href="http://www.RTCMultiConnection.org/">RTCMultiConnection</a>
</h1>
<blockquote style="background: #f3b7b7;border: 5px solid black;border-radius: 5px; padding: 10px;">
This demo is <span style="border: 1px dotted red; background: yellow; padding: 2px 5px;">out-dated i.e. deprecated (written in 2013)</span>.
<br><br>
Please try other demos: <a href="https://github.com/muaz-khan/RTCMultiConnection">https://github.com/muaz-khan/RTCMultiConnection</a>
</blockquote>
<p>
This example explains how to crop remote stream. Cropping code is taken from <a href="https://github.com/andersevenrud/webrtc-screenshare-crop-demo">this link</a>. See <a href="https://plus.google.com/+WebRTC-Experiment/posts/SPsk2hCaiuj" target="_blank">how to test this demo?</a>.
</p>
<div id="edit-panel">
<div>
<label for="x">X</label>
<input type="number" name="x" id="x" value="0" />
</div>
<div>
<label for="y">Y</label>
<input type="number" name="y" id="y" value="0" />
</div>
<div>
<label for="w">Width (-1 = Full size)</label>
<input type="number" name="w" id="w" value="-1" />
</div>
<div>
<label for="h">Height (-1 = Full size)</label>
<input type="number" name="h" id="h" value="-1" />
</div>
<div>
<button id="update">Update</button>
</div>
</div>
<h2>Cropped Screen:</h2>
<div id="LocalVideo"></div>
<script>
// this script tag is taken from: https://github.com/andersevenrud/webrtc-screenshare-crop-demo
var CROP_X = 10;
var CROP_Y = 20;
var CROP_W = 320; // default width
var CROP_H = 240; // default height
var VIDEO_WIDTH = 0;
var VIDEO_HEIGHT = 0;
var MAX_VIDEO_WIDTH = 1920;
var MAX_VIDEO_HEIGHT = 1080;
var _canvas;
var _context;
// Form elements
document.getElementById("x").value = CROP_X;
document.getElementById("y").value = CROP_Y;
document.getElementById("w").value = CROP_W;
document.getElementById("h").value = CROP_H;
document.getElementById("update").addEventListener('click', function() {
var x = document.getElementById("x").value << 0;
var y = document.getElementById("y").value << 0;
var w = document.getElementById("w").value << 0;
var h = document.getElementById("h").value << 0;
if (x >= 0) {
CROP_X = x;
}
if (y >= 0) {
CROP_Y = y;
}
CROP_W = w || 0;
CROP_H = h || 0;
if (_canvas) {
if (_canvas.parentNode) {
_canvas.parentNode.removeChild(_canvas);
}
_canvas = null;
_context = null;
}
connection.send({
CROP_X: CROP_X,
CROP_Y: CROP_Y,
CROP_W: CROP_W,
CROP_H: CROP_H
});
});
/**
* Crops a video frame and shows it to the user
*/
function CropFrame(ev, stream, video, callback) {
if (!_canvas) {
if (CROP_X < 0) {
CROP_X = 0;
}
if (CROP_Y < 0) {
CROP_Y = 0;
}
if (CROP_W <= 0) {
CROP_W = VIDEO_WIDTH;
}
if (CROP_H <= 0) {
CROP_H = VIDEO_HEIGHT;
}
if (CROP_W > MAX_VIDEO_WIDTH) {
CROP_W = MAX_VIDEO_WIDTH;
}
if (CROP_H > MAX_VIDEO_HEIGHT) {
CROP_W = MAX_VIDEO_HEIGHT;
}
_canvas = document.createElement('canvas');
_canvas.width = CROP_W;
_canvas.height = CROP_H;
_context = _canvas.getContext('2d');
document.getElementById("LocalVideo").appendChild(_canvas);
}
_context.drawImage(video, CROP_X, CROP_Y, CROP_W, CROP_H, 0, 0, CROP_W, CROP_H);
// We need to scale down the image or else we get HTTP 414 Errors
// Also we scale down because of RTC message length restriction
var scanvas = document.createElement('canvas');
scanvas.width = _canvas.width;
scanvas.height = _canvas.height;
var wRatio = _canvas.width / 320;
var hRatio = _canvas.height / 240;
var maxRatio = Math.max(wRatio, hRatio);
if (maxRatio > 1) {
scanvas.width = _canvas.width / maxRatio;
scanvas.height = _canvas.height / maxRatio;
}
scanvas.getContext('2d').drawImage(_canvas, 0, 0, scanvas.width, scanvas.height);
callback(scanvas.toDataURL("image/jpeg"));
}
</script>
<script>
(function() {
var params = {},
r = /([^&=]+)=?([^&]*)/g;
function d(s) {
return decodeURIComponent(s.replace(/\+/g, ' '));
}
var match, search = window.location.search;
while (match = r.exec(search.substring(1)))
params[d(match[1])] = d(match[2]);
window.params = params;
})();
var connection = new RTCMultiConnection();
// https://github.com/muaz-khan/WebRTC-Experiment/tree/master/socketio-over-nodejs
var SIGNALING_SERVER = 'https://socketio-over-nodejs2.herokuapp.com:443/';
connection.openSignalingChannel = function(config) {
var channel = config.channel || connection.channel || 'default-namespace';
var sender = Math.round(Math.random() * 9999999999) + 9999999999;
io.connect(SIGNALING_SERVER).emit('new-channel', {
channel: channel,
sender: sender
});
var socket = io.connect(SIGNALING_SERVER + channel);
socket.channel = channel;
socket.on('connect', function() {
if (config.callback) config.callback(socket);
});
socket.send = function(message) {
socket.emit('message', {
sender: sender,
data: message
});
};
socket.on('message', config.onmessage);
};
connection.session = {
screen: true,
data: true,
oneway: true
};
connection.onmessage = function(event) {
CROP_X = event.data.CROP_X;
CROP_Y = event.data.CROP_Y;
CROP_W = event.data.CROP_W;
CROP_H = event.data.CROP_H;
if (!_canvas) return;
_canvas.width = CROP_W;
_canvas.height = CROP_H;
};
connection.onstream = function(event) {
var inited = false;
event.mediaElement.addEventListener('timeupdate', function(ev) {
if (!inited) {
VIDEO_WIDTH = event.mediaElement.offsetWidth;
VIDEO_HEIGHT = event.mediaElement.offsetHeight;
event.mediaElement.style.display = 'none';
event.mediaElement.style.visibility = 'hidden';
inited = true;
}
CropFrame(ev, event.stream, event.mediaElement);
});
};
if (params.sessionid) {
// for participants
connection.channel = connection.sessionid = params.sessionid;
connection.join({
sessionid: params.sessionid,
userid: params.sessionid,
extra: {},
session: connection.session
});
document.getElementById('edit-panel').style.display = 'none';
} else {
// for initiator
connection.channel = connection.sessionid = connection.userid;
connection.open({
dontTransmit: true,
onMediaCaptured: function() {
var domain = 'https://www.webrtc-experiment.com';
var resultingURL = domain + '/RTCMultiConnection/cropped-screen-sharing.html?sessionid=' + connection.sessionid;
document.querySelector('h1').innerHTML = '<a href="' + resultingURL + '" target="_blank">Share this private room URL</a>';
}
});
}
</script>
</body>
</html>