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Add ability to limit outgoing throughput.

This will hopefully become unnecessary once we have better congestion
control.
This commit is contained in:
Juliusz Chroboczek 2020-08-26 18:32:01 +02:00
parent a4b528e1e7
commit e0a81e7f03
3 changed files with 72 additions and 0 deletions

View file

@ -84,6 +84,12 @@ h1 {
margin-right: 0.4em; margin-right: 0.4em;
} }
#sendselect {
width: 8em;
text-align-last: center;
margin-right: 0.4em;
}
#requestselect { #requestselect {
width: 8em; width: 8em;
text-align-last: center; text-align-last: center;

View file

@ -50,6 +50,14 @@
<button id="sharebutton" class="invisible">Share screen</button> <button id="sharebutton" class="invisible">Share screen</button>
<button id="unsharebutton" class="invisible">Stop sharing</button> <button id="unsharebutton" class="invisible">Stop sharing</button>
<label for="sendselect">Send:</label>
<select id="sendselect">
<option value="lowest">lowest</option>
<option value="low">low</option>
<option value="normal" selected>normal</option>
<option value="unlimited">unlimited</option>
</select>
<label for="requestselect">Receive:</label> <label for="requestselect">Receive:</label>
<select id="requestselect"> <select id="requestselect">
<option value="audio">audio only</option> <option value="audio">audio only</option>

View file

@ -186,6 +186,33 @@ document.getElementById('unsharebutton').onclick = function(e) {
delUpMediaKind('screenshare'); delUpMediaKind('screenshare');
} }
/** @returns {number} */
function getMaxVideoThroughput() {
let v = document.getElementById('sendselect').value;
switch(v) {
case 'lowest':
return 150000;
case 'low':
return 300000;
case 'normal':
return 700000;
case 'unlimited':
return null;
default:
console.error('Unknown video quality', v);
return 700000;
}
}
document.getElementById('sendselect').onchange = async function(e) {
let t = getMaxVideoThroughput();
for(let id in serverConnection.up) {
let c = serverConnection.up[id];
if(c.kind === 'local')
await setMaxVideoThroughput(c, t);
}
}
document.getElementById('requestselect').onchange = function(e) { document.getElementById('requestselect').onchange = function(e) {
e.preventDefault(); e.preventDefault();
serverConnection.request(this.value); serverConnection.request(this.value);
@ -291,9 +318,39 @@ function newUpStream(id) {
c.onabort = function() { c.onabort = function() {
delUpMedia(c); delUpMedia(c);
} }
c.onnegotiationcompleted = function() {
setMaxVideoThroughput(c, getMaxVideoThroughput())
}
return c; return c;
} }
/**
* @param {Stream} c
* @param {number} [bps]
*/
async function setMaxVideoThroughput(c, bps) {
let senders = c.pc.getSenders();
for(let i = 0; i < senders.length; i++) {
let s = senders[i];
if(!s.track || s.track.kind !== 'video')
continue;
let p = s.getParameters();
if(!p.encodings)
continue;
p.encodings.forEach(e => {
if(bps > 0)
e.maxBitrate = bps;
else
delete e.maxBitrate;
});
try {
await s.setParameters(p);
} catch(e) {
console.error(e);
}
}
}
/** /**
* @param {string} [id] * @param {string} [id]
*/ */
@ -338,6 +395,7 @@ async function addLocalMedia(id) {
t.enabled = false; t.enabled = false;
let sender = c.pc.addTrack(t, stream); let sender = c.pc.addTrack(t, stream);
}); });
c.onstats = displayStats; c.onstats = displayStats;
c.setStatsInterval(2000); c.setStatsInterval(2000);
await setMedia(c, true); await setMedia(c, true);