jitsi / sdp-simulcast

An npm module that enables the native WebRTC simulcast support in Chrome

This is an npm module to take advantage of the native simulcast capabilities in Chrome. It can handle both sending and reception. It has two reception modes

• simulcast layers imploding
• simulcast layers exploding

sdp-simulcast's Issues

0.1.10 Broke Something

Error message:

Uncaught TypeError: Cannot read property 'ssrcs' of undefined
    at o._restoreSimulcast (https://[...]:10:27147)
    at https://[...]:10:27868
    at https://[...]:10:23587
    at Array.forEach (native)
    at a (https://[...]:10:23549)
    at o.mungeLocalDescription (https://[...]:10:27800)
    at t.S.patchLocalSDP (https://[...]:5:23997)
    at https://[...]:5:24483

Code:

Snippet 1

this.simulcast = new Simulcast({
	"numOfLayers": 2
})

Snippet 2

/**
 * @description patch local SDP
 * @returns {String} patched local description
 */
patchLocalSDP = sdp => {
	this.debug('patchLocalSDP', sdp)

	const simulcastSDP = this.simulcast.mungeLocalDescription({type: 'offer', sdp}).sdp

	return this.patchSDP(simulcastSDP)
}

/**
 * @description patch remote SDP
 * @returns {String} patched remote description
 */
patchRemoteSDP = sdp => {
	this.debug('patchRemoteSDP', sdp)

	const simulcastSDP = this.simulcast.mungeRemoteDescription({type: 'answer', sdp}).sdp

	return this.patchSDP(simulcastSDP)
}

Additional Information

No error is thrown in v0.1.7.