int MediaStream::sendPLI() { RtcpHeader thePLI; thePLI.setPacketType(RTCP_PS_Feedback_PT); thePLI.setBlockCount(1); thePLI.setSSRC(this->getVideoSinkSSRC()); thePLI.setSourceSSRC(this->getVideoSourceSSRC()); thePLI.setLength(2); char *buf = reinterpret_cast<char*>(&thePLI); int len = (thePLI.getLength() + 1) * 4; sendPacketAsync(std::make_shared<DataPacket>(0, buf, len, VIDEO_PACKET)); return len; }
int WebRtcConnection::sendPLI() { RtcpHeader thePLI; thePLI.setPacketType(RTCP_PS_Feedback_PT); thePLI.setBlockCount(1); thePLI.setSSRC(this->getVideoSinkSSRC()); thePLI.setSourceSSRC(this->getVideoSourceSSRC()); thePLI.setLength(2); char *buf = reinterpret_cast<char*>(&thePLI); int len = (thePLI.getLength()+1)*4; this->queueData(0, buf, len , videoTransport_, OTHER_PACKET); return len; }
int ExternalOutput::sendFirPacket() { if (fbSink_ != NULL) { RtcpHeader thePLI; thePLI.setPacketType(RTCP_PS_Feedback_PT); thePLI.setBlockCount(1); thePLI.setSSRC(55543); thePLI.setSourceSSRC(videoSourceSsrc_); thePLI.setLength(2); char *buf = reinterpret_cast<char*>(&thePLI); int len = (thePLI.getLength() + 1) * 4; fbSink_->deliverFeedback(reinterpret_cast<char*>(buf), len); return len; } return -1; }
int RtcpForwarder::addNACK(char* buf, int len, uint16_t seqNum, uint16_t blp, uint32_t sourceSsrc, uint32_t sinkSsrc){ buf+=len; ELOG_DEBUG("Setting PID %u, BLP %u", seqNum , blp); RtcpHeader theNACK; theNACK.setPacketType(RTCP_RTP_Feedback_PT); theNACK.setBlockCount(1); theNACK.setNackPid(seqNum); theNACK.setNackBlp(blp); theNACK.setSSRC(sinkSsrc); theNACK.setSourceSSRC(sourceSsrc); theNACK.setLength(3); int nackLength = (theNACK.getLength()+1)*4; memcpy(buf, (uint8_t*)&theNACK, nackLength); return (len+nackLength); }
int ExternalOutput::sendFirPacket() { if (fb_sink_ != nullptr) { RtcpHeader thePLI; thePLI.setPacketType(RTCP_PS_Feedback_PT); thePLI.setBlockCount(1); thePLI.setSSRC(55543); thePLI.setSourceSSRC(videoSourceSsrc_); thePLI.setLength(2); char *buf = reinterpret_cast<char*>(&thePLI); int len = (thePLI.getLength() + 1) * 4; std::shared_ptr<dataPacket> pli_packet = std::make_shared<dataPacket>(0, buf, len, VIDEO_PACKET); fb_sink_->deliverFeedback(pli_packet); return len; } return -1; }
int RtcpForwarder::addREMB(char* buf, int len, uint32_t bitrate){ buf+=len; RtcpHeader theREMB; theREMB.setPacketType(RTCP_PS_Feedback_PT); theREMB.setBlockCount(RTCP_AFB); memcpy(&theREMB.report.rembPacket.uniqueid, "REMB", 4); theREMB.setSSRC(rtcpSink_->getVideoSinkSSRC()); theREMB.setSourceSSRC(rtcpSource_->getVideoSourceSSRC()); theREMB.setLength(5); theREMB.setREMBBitRate(bitrate); theREMB.setREMBNumSSRC(1); theREMB.setREMBFeedSSRC(rtcpSource_->getVideoSourceSSRC()); int rembLength = (theREMB.getLength()+1)*4; memcpy(buf, (uint8_t*)&theREMB, rembLength); return (len+rembLength); }
int RtcpForwarder::analyzeFeedback(char *buf, int len) { RtcpHeader *chead = reinterpret_cast<RtcpHeader*>(buf); if (chead->isFeedback()) { uint32_t sourceSsrc = chead->getSourceSSRC(); // We try to add it just in case it is not there yet (otherwise its noop) this->addSourceSsrc(sourceSsrc); struct timeval now; gettimeofday(&now, NULL); char* movingBuf = buf; int rtcpLength = 0; int totalLength = 0; int currentBlock = 0; do { movingBuf+=rtcpLength; chead = reinterpret_cast<RtcpHeader*>(movingBuf); rtcpLength = (ntohs(chead->length)+1) * 4; totalLength += rtcpLength; switch(chead->packettype){ case RTCP_SDES_PT: ELOG_DEBUG("SDES"); break; case RTCP_BYE: ELOG_DEBUG("BYE"); break; case RTCP_Receiver_PT: if (chead->getSourceSSRC() == rtcpSource_->getVideoSourceSSRC()){ ELOG_DEBUG("Analyzing Video RR: PacketLost %u, Ratio %u, currentBlock %d, blocks %d, sourceSSRC %u, ssrc %u changed to %u", chead->getLostPackets(), chead->getFractionLost(), currentBlock, chead->getBlockCount(), chead->getSourceSSRC(), chead->getSSRC(), rtcpSink_->getVideoSinkSSRC()); chead->setSSRC(rtcpSink_->getVideoSinkSSRC()); }else{ ELOG_DEBUG("Analyzing Audio RR: PacketLost %u, Ratio %u, currentBlock %d, blocks %d, sourceSSRC %u, ssrc %u changed to %u", chead->getLostPackets(), chead->getFractionLost(), currentBlock, chead->getBlockCount(), chead->getSourceSSRC(), chead->getSSRC(), rtcpSink_->getAudioSinkSSRC()); chead->setSSRC(rtcpSink_->getAudioSinkSSRC()); } break; case RTCP_RTP_Feedback_PT: ELOG_DEBUG("RTP FB: Usually NACKs: %u, currentBlock %d", chead->getBlockCount(), currentBlock); ELOG_DEBUG("NACK PID %u BLP %u", chead->getNackPid(), chead->getNackBlp()); // We analyze NACK to avoid sending repeated NACKs break; case RTCP_PS_Feedback_PT: // ELOG_DEBUG("RTCP PS FB TYPE: %u", chead->getBlockCount() ); switch(chead->getBlockCount()){ case RTCP_PLI_FMT: ELOG_DEBUG("PLI Message, currentBlock %d", currentBlock); // 1: PLI, 4: FIR break; case RTCP_SLI_FMT: ELOG_WARN("SLI Message"); break; case RTCP_FIR_FMT: ELOG_WARN("FIR Message"); break; case RTCP_AFB: { char *uniqueId = (char*)&chead->report.rembPacket.uniqueid; if (!strncmp(uniqueId,"REMB", 4)){ uint64_t bitrate = chead->getBrMantis() << chead->getBrExp(); uint64_t cappedBitrate = 0; cappedBitrate = bitrate < maxVideoBw_? bitrate: maxVideoBw_; if (bitrate < maxVideoBw_){ cappedBitrate = bitrate; }else{ cappedBitrate = maxVideoBw_; } ELOG_DEBUG("Received REMB %lu, partnum %u, cappedBitrate %lu", bitrate, currentBlock, cappedBitrate); chead->setREMBBitRate(cappedBitrate); } else{ ELOG_WARN("Unsupported AFB Packet not REMB") } break; } default: ELOG_WARN("Unsupported RTCP_PS FB TYPE %u",chead->getBlockCount()); break; } break; default: ELOG_WARN("Unknown RTCP Packet, %d", chead->packettype); break; } currentBlock++; } while (totalLength < len); return len; }
void RtcpAggregator::checkRtcpFb() { boost::mutex::scoped_lock mlock(mapLock_); std::map<uint32_t, boost::shared_ptr<RtcpData>>::iterator it; for (it = rtcpData_.begin(); it != rtcpData_.end(); it++) { boost::shared_ptr<RtcpData> rtcpData = it->second; boost::mutex::scoped_lock lock(rtcpData->dataLock); uint32_t sourceSsrc = it->first; uint32_t sinkSsrc; uint64_t now = ClockUtils::timePointToMs(clock::now()); unsigned int dt = now - rtcpData->last_rr_sent; unsigned int edlsr = now - rtcpData->last_sr_updated; unsigned int dt_scheduled = now - rtcpData->last_rr_was_scheduled; // Generate Full RTCP Packet if ((rtcpData->requestRr || dt >= rtcpData->nextPacketInMs ||rtcpData->shouldSendREMB) && rtcpData->lastSr > 0) { rtcpData->requestRr = false; RtcpHeader rtcpHead; rtcpHead.setPacketType(RTCP_Receiver_PT); if (sourceSsrc == rtcpSource_->getAudioSourceSSRC()) { sinkSsrc = rtcpSink_->getAudioSinkSSRC(); ELOG_DEBUG("Sending Audio RR: PacketLost %u, Ratio %u, DLSR %u" ", lastSR %u, DLSR Adjusted %u dt %u, rrsSinceLast %u highestSeqNum %u", rtcpData->totalPacketsLost, rtcpData->ratioLost, rtcpData->delaySinceLastSr, rtcpData->lastSr, (rtcpData->delaySinceLastSr+edlsr), dt, rtcpData->rrsReceivedInPeriod, rtcpData->highestSeqNumReceived); rtcpHead.setSSRC(rtcpSink_->getAudioSinkSSRC()); rtcpHead.setSourceSSRC(rtcpSource_->getAudioSourceSSRC()); } else { sinkSsrc = rtcpSink_->getVideoSinkSSRC(); ELOG_DEBUG("Sending Video RR: SOurcessrc %u sinkSsrc %u PacketLost %u, Ratio %u, DLSR %u, lastSR %u" ", DLSR Adjusted %u dt %u, rrsSinceLast %u highestSeqNum %u jitter %u", sourceSsrc, rtcpSink_->getVideoSinkSSRC(), rtcpData->totalPacketsLost, rtcpData->ratioLost, rtcpData->delaySinceLastSr, rtcpData->lastSr, (rtcpData->delaySinceLastSr+edlsr), dt, rtcpData->rrsReceivedInPeriod, rtcpData->highestSeqNumReceived, rtcpData->jitter); rtcpHead.setSSRC(rtcpSink_->getVideoSinkSSRC()); rtcpHead.setSourceSSRC(rtcpSource_->getVideoSourceSSRC()); } // rtcpHead.setFractionLost(rtcpData->ratioLost); // Calculate ratioLost uint32_t packetsReceivedinInterval = rtcpData->extendedSeqNo - rtcpData->prevExtendedSeqNo; uint32_t packetsLostInInterval = rtcpData->totalPacketsLost - rtcpData->prevTotalPacketsLost; double ratio = static_cast<double>(packetsLostInInterval/packetsReceivedinInterval); rtcpHead.setFractionLost(ratio*256); rtcpData->prevTotalPacketsLost = rtcpData->totalPacketsLost; rtcpData->prevExtendedSeqNo = rtcpData->extendedSeqNo; rtcpHead.setHighestSeqnum(rtcpData->highestSeqNumReceived); rtcpHead.setSeqnumCycles(rtcpData->seqNumCycles); rtcpHead.setLostPackets(rtcpData->totalPacketsLost); rtcpHead.setJitter(rtcpData->jitter); rtcpHead.setLastSr(rtcpData->lastSr); rtcpHead.setDelaySinceLastSr(rtcpData->delaySinceLastSr + ((edlsr*65536)/1000)); rtcpHead.setLength(7); rtcpHead.setBlockCount(1); int length = (rtcpHead.getLength()+1)*4; memcpy(packet_, reinterpret_cast<uint8_t*>(&rtcpHead), length); if (rtcpData->shouldSendNACK) { ELOG_DEBUG("SEND NACK, SENDING with Seqno: %u", rtcpData->nackSeqnum); int theLen = this->addNACK(reinterpret_cast<char*>(packet_), length, rtcpData->nackSeqnum, rtcpData->nackBlp, sourceSsrc, sinkSsrc); rtcpData->shouldSendNACK = false; rtcpData->nackSeqnum = 0; rtcpData->nackBlp = 0; length = theLen; } if (rtcpData->mediaType == VIDEO_TYPE) { unsigned int sincelastREMB = now - rtcpData->last_remb_sent; if (sincelastREMB > REMB_TIMEOUT) { // We dont have any more RRs, we follow what the publisher is doing to avoid congestion rtcpData->shouldSendREMB = true; } if (rtcpData->shouldSendREMB) { ELOG_DEBUG("Sending REMB, since last %u ms, sending with BW: %lu", sincelastREMB, rtcpData->reportedBandwidth); int theLen = this->addREMB(reinterpret_cast<char*>(packet_), length, rtcpData->reportedBandwidth); rtcpData->shouldSendREMB = false; rtcpData->last_remb_sent = now; length = theLen; } } if (rtcpSource_->isVideoSourceSSRC(sourceSsrc)) { rtcpSink_->deliverVideoData(std::make_shared<DataPacket>(0, reinterpret_cast<char*>(packet_), length, VIDEO_PACKET)); } else { rtcpSink_->deliverAudioData(std::make_shared<DataPacket>(0, reinterpret_cast<char*>(packet_), length, AUDIO_PACKET)); } rtcpData->last_rr_sent = now; if (dt_scheduled > rtcpData->nextPacketInMs) { // Every scheduled packet we reset rtcpData->shouldReset = true; } rtcpData->last_rr_was_scheduled = now; // schedule next packet std::string thread_id = boost::lexical_cast<std::string>(boost::this_thread::get_id()); unsigned int thread_number = 0; sscanf(thread_id.c_str(), "%x", &thread_number); float random = (rand_r(&thread_number) % 100 + 50) / 100.0; if (rtcpData->mediaType == AUDIO_TYPE) { rtcpData->nextPacketInMs = RTCP_AUDIO_INTERVAL*random; ELOG_DEBUG("Scheduled next Audio RR in %u ms", rtcpData->nextPacketInMs); } else { rtcpData->nextPacketInMs = (RTCP_VIDEO_INTERVAL)*random; ELOG_DEBUG("Scheduled next Video RR in %u ms", rtcpData->nextPacketInMs); } if (rtcpData->shouldReset) { this->resetData(rtcpData, this->defaultVideoBw_); } } if (rtcpData->shouldSendPli) { rtcpSource_->sendPLI(); rtcpData->shouldSendPli = false; } } }