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Copy pathforwarder.cpp
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222 lines (201 loc) · 5.75 KB
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#include "rtp/forwarder.h"
#include "rtp/g711.h"
#include "rtp/rtp_packet.h"
#include <poll.h>
#include <time.h>
namespace rtp {
bool RtpForwarder::AddRoom(const std::string& room_id) {
std::lock_guard<std::mutex> lock(mu_);
if (rooms_.count(room_id) != 0) {
return true;
}
RoomMedia room;
room.id = room_id;
rooms_.emplace(room_id, std::move(room));
return true;
}
bool RtpForwarder::RemoveRoom(const std::string& room_id) {
std::lock_guard<std::mutex> lock(mu_);
auto it = rooms_.find(room_id);
if (it == rooms_.end()) {
return false;
}
for (const auto& kv : it->second.participants) {
ports_.erase(kv.second.ingest_port);
}
rooms_.erase(it);
return true;
}
bool RtpForwarder::AddParticipant(const std::string& room_id,
const ParticipantMedia& p) {
std::lock_guard<std::mutex> lock(mu_);
auto rit = rooms_.find(room_id);
if (rit == rooms_.end()) {
return false;
}
if (p.ingest_port == 0) {
return false;
}
auto pit = ports_.find(p.ingest_port);
if (pit != ports_.end() &&
(pit->second->room_id != room_id ||
pit->second->participant_id != p.id)) {
return false;
}
if (pit == ports_.end()) {
auto ingest = std::make_unique<IngestPort>();
ingest->port = p.ingest_port;
ingest->room_id = room_id;
ingest->participant_id = p.id;
ingest->sock = std::make_unique<UdpSocket>();
if (!ingest->sock->Bind("0.0.0.0", p.ingest_port)) {
return false;
}
ingest->sock->SetNonBlocking(true);
ports_.emplace(p.ingest_port, std::move(ingest));
} else {
pit->second->participant_id = p.id;
pit->second->room_id = room_id;
}
rit->second.participants[p.id] = p;
return true;
}
bool RtpForwarder::RemoveParticipant(const std::string& room_id,
const std::string& participant_id) {
std::lock_guard<std::mutex> lock(mu_);
auto rit = rooms_.find(room_id);
if (rit == rooms_.end()) {
return false;
}
auto pit = rit->second.participants.find(participant_id);
if (pit == rit->second.participants.end()) {
return false;
}
ports_.erase(pit->second.ingest_port);
rit->second.participants.erase(pit);
return true;
}
void RtpForwarder::HandlePacket(IngestPort* ingest, const uint8_t* data,
size_t len, const SockAddr& from) {
(void)from;
RtpPacket pkt;
if (!pkt.Parse(data, len)) {
++packets_drop_;
return;
}
std::vector<ParticipantMedia> dests;
ParticipantMedia sender;
{
std::lock_guard<std::mutex> lock(mu_);
auto rit = rooms_.find(ingest->room_id);
if (rit == rooms_.end()) {
++packets_drop_;
return;
}
auto sit = rit->second.participants.find(ingest->participant_id);
if (sit == rit->second.participants.end()) {
++packets_drop_;
return;
}
sender = sit->second;
dests.reserve(rit->second.participants.size());
for (const auto& kv : rit->second.participants) {
if (kv.first == sender.id) {
continue;
}
dests.push_back(kv.second);
}
}
++packets_in_;
auto spit = ports_.find(sender.ingest_port);
if (spit == ports_.end() || !spit->second->sock) {
++packets_drop_;
return;
}
for (const auto& dest : dests) {
RtpPacket out = pkt;
const uint8_t in_pt = sender.send_pt;
const uint8_t out_pt = dest.recv_pt;
if (in_pt != out_pt) {
out.set_payload(g711::ConvertPayload(pkt.payload(), in_pt, out_pt));
out.set_payload_type(out_pt);
} else {
out.set_payload_type(in_pt);
}
const std::vector<uint8_t> wire = out.Serialize();
if (wire.empty()) {
++packets_drop_;
continue;
}
if (spit->second->sock->SendTo(wire, dest.egress) > 0) {
++packets_out_;
} else {
++packets_drop_;
}
}
}
int RtpForwarder::Poll(int timeout_ms) {
std::vector<pollfd> pfds;
std::vector<IngestPort*> ingest_by_idx;
{
std::lock_guard<std::mutex> lock(mu_);
pfds.reserve(ports_.size());
ingest_by_idx.reserve(ports_.size());
for (auto& kv : ports_) {
pollfd p{};
p.fd = kv.second->sock->fd();
p.events = POLLIN;
pfds.push_back(p);
ingest_by_idx.push_back(kv.second.get());
}
}
if (pfds.empty()) {
if (timeout_ms > 0) {
timespec ts;
ts.tv_sec = timeout_ms / 1000;
ts.tv_nsec = (timeout_ms % 1000) * 1000000L;
nanosleep(&ts, nullptr);
}
return 0;
}
const int pr = ::poll(pfds.data(), pfds.size(), timeout_ms);
if (pr <= 0) {
return 0;
}
uint8_t buf[2048];
int handled = 0;
for (size_t i = 0; i < pfds.size(); ++i) {
if ((pfds[i].revents & POLLIN) == 0) {
continue;
}
SockAddr from;
const int n = ingest_by_idx[i]->sock->RecvFrom(buf, sizeof(buf), &from);
if (n > 0) {
HandlePacket(ingest_by_idx[i], buf, static_cast<size_t>(n), from);
++handled;
}
}
return handled;
}
std::string RtpForwarder::Dump() const {
std::lock_guard<std::mutex> lock(mu_);
std::string out = "rooms=" + std::to_string(rooms_.size());
out += " ports=" + std::to_string(ports_.size());
out += " in=" + std::to_string(packets_in_);
out += " out=" + std::to_string(packets_out_);
out += " drop=" + std::to_string(packets_drop_);
for (const auto& rk : rooms_) {
out += "\n room " + rk.first + " participants=" +
std::to_string(rk.second.participants.size());
for (const auto& pk : rk.second.participants) {
const auto& p = pk.second;
out += "\n " + p.id + " ingest=:" + std::to_string(p.ingest_port) +
" egress=" + p.egress.ToString() +
" ssrc=" + std::to_string(p.ssrc) +
" send_pt=" + std::to_string(p.send_pt) +
" recv_pt=" + std::to_string(p.recv_pt);
}
}
return out;
}
} // namespace rtp