How to use the sdp.writeCandidate function in sdp

To help you get started, we’ve selected a few sdp examples, based on popular ways it is used in public projects.

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webrtcHacks / adapter / release / adapter_no_global.js View on Github

var event = new Event('icecandidate');
      event.candidate = {sdpMid: mid, sdpMLineIndex: sdpMLineIndex};

      var cand = evt.candidate;
      var end = !cand || Object.keys(cand).length === 0;
      // Edge emits an empty object for RTCIceCandidateComplete‥
      if (end) {
        // polyfill since RTCIceGatherer.state is not implemented in
        // Edge 10547 yet.
        if (iceGatherer.state === undefined) {
          iceGatherer.state = 'completed';
        }
      } else {
        // RTCIceCandidate doesn't have a component, needs to be added
        cand.component = 1;
        event.candidate.candidate = SDPUtils.writeCandidate(cand);
      }

      // update local description.
      var sections = SDPUtils.splitSections(self.localDescription.sdp);
      if (!end) {
        sections[event.candidate.sdpMLineIndex + 1] +=
            'a=' + event.candidate.candidate + '\r\n';
      } else {
        sections[event.candidate.sdpMLineIndex + 1] +=
            'a=end-of-candidates\r\n';
      }
      self.localDescription.sdp = sections.join('');
      var transceivers = self._pendingOffer ? self._pendingOffer :
          self.transceivers;
      var complete = transceivers.every(function(transceiver) {
        return transceiver.iceGatherer &&

StackableRegiments / analyticalmetlx / src / main / webapp / static / js / stable / kurento / adapter.js View on Github

// Edge 10547 yet.
              if (iceGatherer.state === undefined) {
                iceGatherer.state = 'completed';
              }

              // Emit a candidate with type endOfCandidates to make the samples
              // work. Edge requires addIceCandidate with this empty candidate
              // to start checking. The real solution is to signal
              // end-of-candidates to the other side when getting the null
              // candidate but some apps (like the samples) don't do that.
              event.candidate.candidate =
                  'candidate:1 1 udp 1 0.0.0.0 9 typ endOfCandidates';
            } else {
              // RTCIceCandidate doesn't have a component, needs to be added
              cand.component = iceTransport.component === 'RTCP' ? 2 : 1;
              event.candidate.candidate = SDPUtils.writeCandidate(cand);
            }

            // update local description.
            var sections = SDPUtils.splitSections(self.localDescription.sdp);
            if (event.candidate.candidate.indexOf('typ endOfCandidates')
                === -1) {
              sections[event.candidate.sdpMLineIndex + 1] +=
                  'a=' + event.candidate.candidate + '\r\n';
            } else {
              sections[event.candidate.sdpMLineIndex + 1] +=
                  'a=end-of-candidates\r\n';
            }
            self.localDescription.sdp = sections.join('');

            var complete = self.transceivers.every(function(transceiver) {
              return transceiver.iceGatherer &&

webrtcHacks / adapter / src / js / edge / edge_shim.js View on Github

var event = new Event('icecandidate');
            event.candidate = {sdpMid: mid, sdpMLineIndex: sdpMLineIndex};

            var cand = evt.candidate;
            var end = !cand || Object.keys(cand).length === 0;
            // Edge emits an empty object for RTCIceCandidateComplete‥
            if (end) {
              // polyfill since RTCIceGatherer.state is not implemented in
              // Edge 10547 yet.
              if (iceGatherer.state === undefined) {
                iceGatherer.state = 'completed';
              }
            } else {
              // RTCIceCandidate doesn't have a component, needs to be added
              cand.component = iceTransport.component === 'RTCP' ? 2 : 1;
              event.candidate.candidate = SDPUtils.writeCandidate(cand);
            }

            // update local description.
            var sections = SDPUtils.splitSections(self.localDescription.sdp);
            if (!end) {
              sections[event.candidate.sdpMLineIndex + 1] +=
                  'a=' + event.candidate.candidate + '\r\n';
            } else {
              sections[event.candidate.sdpMLineIndex + 1] +=
                  'a=end-of-candidates\r\n';
            }
            self.localDescription.sdp = sections.join('');
            var transceivers = self._pendingOffer ? self._pendingOffer :
                self.transceivers;
            var complete = transceivers.every(function(transceiver) {
              return transceiver.iceGatherer &&

t-mullen / techno-synesthesia / dist / bundle.js View on Github

// Edge 10547 yet.
              if (iceGatherer.state === undefined) {
                iceGatherer.state = 'completed';
              }

              // Emit a candidate with type endOfCandidates to make the samples
              // work. Edge requires addIceCandidate with this empty candidate
              // to start checking. The real solution is to signal
              // end-of-candidates to the other side when getting the null
              // candidate but some apps (like the samples) don't do that.
              event.candidate.candidate =
                  'candidate:1 1 udp 1 0.0.0.0 9 typ endOfCandidates';
            } else {
              // RTCIceCandidate doesn't have a component, needs to be added
              cand.component = iceTransport.component === 'RTCP' ? 2 : 1;
              event.candidate.candidate = SDPUtils.writeCandidate(cand);
            }

            // update local description.
            var sections = SDPUtils.splitSections(self.localDescription.sdp);
            if (event.candidate.candidate.indexOf('typ endOfCandidates')
                === -1) {
              sections[event.candidate.sdpMLineIndex + 1] +=
                  'a=' + event.candidate.candidate + '\r\n';
            } else {
              sections[event.candidate.sdpMLineIndex + 1] +=
                  'a=end-of-candidates\r\n';
            }
            self.localDescription.sdp = sections.join('');

            var complete = self.transceivers.every(function(transceiver) {
              return transceiver.iceGatherer &&

webrtcHacks / adapter / src / js / edge / rtcpeerconnection_shim.js View on Github

var event = new Event('icecandidate');
      event.candidate = {sdpMid: mid, sdpMLineIndex: sdpMLineIndex};

      var cand = evt.candidate;
      var end = !cand || Object.keys(cand).length === 0;
      // Edge emits an empty object for RTCIceCandidateComplete‥
      if (end) {
        // polyfill since RTCIceGatherer.state is not implemented in
        // Edge 10547 yet.
        if (iceGatherer.state === undefined) {
          iceGatherer.state = 'completed';
        }
      } else {
        // RTCIceCandidate doesn't have a component, needs to be added
        cand.component = 1;
        event.candidate.candidate = SDPUtils.writeCandidate(cand);
      }

      // update local description.
      var sections = SDPUtils.splitSections(self.localDescription.sdp);
      if (!end) {
        sections[event.candidate.sdpMLineIndex + 1] +=
            'a=' + event.candidate.candidate + '\r\n';
      } else {
        sections[event.candidate.sdpMLineIndex + 1] +=
            'a=end-of-candidates\r\n';
      }
      self.localDescription.sdp = sections.join('');
      var transceivers = self._pendingOffer ? self._pendingOffer :
          self.transceivers;
      var complete = transceivers.every(function(transceiver) {
        return transceiver.iceGatherer &&

roomrtc / roomrtc / src / adapter.js View on Github

// Edge 10547 yet.
              if (iceGatherer.state === undefined) {
                iceGatherer.state = 'completed';
              }

              // Emit a candidate with type endOfCandidates to make the samples
              // work. Edge requires addIceCandidate with this empty candidate
              // to start checking. The real solution is to signal
              // end-of-candidates to the other side when getting the null
              // candidate but some apps (like the samples) don't do that.
              event.candidate.candidate =
                  'candidate:1 1 udp 1 0.0.0.0 9 typ endOfCandidates';
            } else {
              // RTCIceCandidate doesn't have a component, needs to be added
              cand.component = iceTransport.component === 'RTCP' ? 2 : 1;
              event.candidate.candidate = SDPUtils.writeCandidate(cand);
            }

            // update local description.
            var sections = SDPUtils.splitSections(self.localDescription.sdp);
            if (event.candidate.candidate.indexOf('typ endOfCandidates')
                === -1) {
              sections[event.candidate.sdpMLineIndex + 1] +=
                  'a=' + event.candidate.candidate + '\r\n';
            } else {
              sections[event.candidate.sdpMLineIndex + 1] +=
                  'a=end-of-candidates\r\n';
            }
            self.localDescription.sdp = sections.join('');

            var complete = self.transceivers.every(function(transceiver) {
              return transceiver.iceGatherer &&

easemob / webim-react-native / webrtc / dist / adapter.js View on Github

// Edge 10547 yet.
              if (iceGatherer.state === undefined) {
                iceGatherer.state = 'completed';
              }

              // Emit a candidate with type endOfCandidates to make the samples
              // work. Edge requires addIceCandidate with this empty candidate
              // to start checking. The real solution is to signal
              // end-of-candidates to the other side when getting the null
              // candidate but some apps (like the samples) don't do that.
              event.candidate.candidate =
                  'candidate:1 1 udp 1 0.0.0.0 9 typ endOfCandidates';
            } else {
              // RTCIceCandidate doesn't have a component, needs to be added
              cand.component = iceTransport.component === 'RTCP' ? 2 : 1;
              event.candidate.candidate = SDPUtils.writeCandidate(cand);
            }

            // update local description.
            var sections = SDPUtils.splitSections(self.localDescription.sdp);
            if (event.candidate.candidate.indexOf('typ endOfCandidates')
                === -1) {
              sections[event.candidate.sdpMLineIndex + 1] +=
                  'a=' + event.candidate.candidate + '\r\n';
            } else {
              sections[event.candidate.sdpMLineIndex + 1] +=
                  'a=end-of-candidates\r\n';
            }
            self.localDescription.sdp = sections.join('');

            var complete = self.transceivers.every(function(transceiver) {
              return transceiver.iceGatherer &&

legastero / stanza / src / jingle / ICESession.ts View on Github

const results = ((content.transport! as JingleIce).candidates || []).map(async json =&gt; {
                const candidate = SDPUtils.writeCandidate(convertCandidateToIntermediate(json));

                let sdpMLineIndex!: number;
                // workaround for https://bugzilla.mozilla.org/show_bug.cgi?id=1456417
                const remoteSDP = this.pc.remoteDescription!.sdp;
                const mediaSections = SDPUtils.getMediaSections(remoteSDP);
                for (let i = 0; i &lt; mediaSections.length; i++) {
                    if (SDPUtils.getMid(mediaSections[i]) === sdpMid) {
                        sdpMLineIndex = i;
                        break;
                    }
                }

                if (this.pc.signalingState === 'stable') {
                    try {
                        await this.pc.addIceCandidate({ sdpMid, sdpMLineIndex, candidate });
                    } catch (err) {

legastero / stanza / src / jingle / sdp / Intermediate.ts View on Github

}
            }
        }

        if (media.mid !== undefined) {
            output.push(`a=mid:${media.mid}\r\n`);
        }
        if (media.iceParameters) {
            output.push(SDP.writeIceParameters(media.iceParameters));
        }
        if (media.dtlsParameters && media.setup) {
            output.push(SDP.writeDtlsParameters(media.dtlsParameters, media.setup));
        }
        if (media.candidates && media.candidates.length) {
            for (const candidate of media.candidates) {
                output.push(`a=${SDP.writeCandidate(candidate)}`);
            }
        }
    }

    return output.join('');
}

How to use the sdp.writeCandidate function in sdp

To help you get started, we’ve selected a few sdp examples, based on popular ways it is used in public projects.

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