mirror of
https://github.com/ZLMediaKit/ZLMediaKit.git
synced 2024-11-27 05:38:31 +08:00
236 lines
9.1 KiB
C++
236 lines
9.1 KiB
C++
/*
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* Copyright (c) 2016 The ZLMediaKit project authors. All Rights Reserved.
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*
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* This file is part of ZLMediaKit(https://github.com/xia-chu/ZLMediaKit).
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*
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* Use of this source code is governed by MIT license that can be found in the
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* LICENSE file in the root of the source tree. All contributing project authors
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* may be found in the AUTHORS file in the root of the source tree.
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*/
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#if defined(ENABLE_RTPPROXY)
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#include "RtpSender.h"
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#include "Rtsp/RtspSession.h"
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#include "Thread/WorkThreadPool.h"
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#include "Util/uv_errno.h"
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#include "RtpCache.h"
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using namespace std;
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using namespace toolkit;
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namespace mediakit{
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RtpSender::RtpSender() {
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_poller = EventPollerPool::Instance().getPoller();
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_socket = Socket::createSocket(_poller, false);
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}
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void RtpSender::startSend(const MediaSourceEvent::SendRtpArgs &args, const function<void(uint16_t local_port, const SockException &ex)> &cb){
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_args = args;
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if (!_interface) {
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//重连时不重新创建对象
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auto lam = [this](std::shared_ptr<List<Buffer::Ptr>> list) { onFlushRtpList(std::move(list)); };
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if (args.use_ps) {
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_interface = std::make_shared<RtpCachePS>(lam, atoi(args.ssrc.data()), args.pt);
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} else {
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_interface = std::make_shared<RtpCacheRaw>(lam, atoi(args.ssrc.data()), args.pt, args.only_audio);
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}
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}
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weak_ptr<RtpSender> weak_self = shared_from_this();
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if (args.passive) {
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// tcp被动发流模式
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_args.is_udp = false;
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try {
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auto tcp_listener = Socket::createSocket(_poller, false);
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if (args.src_port) {
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//指定端口
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if (!tcp_listener->listen(args.src_port)) {
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throw std::invalid_argument(StrPrinter << "open tcp passive server failed on port:" << args.src_port
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<< ", err:" << get_uv_errmsg(true));
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}
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} else {
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auto pr = std::make_pair(tcp_listener, Socket::createSocket(_poller, false));
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//从端口池获取随机端口
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makeSockPair(pr, "::", false, false);
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}
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// tcp服务器默认开启5秒
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auto delay_task = _poller->doDelayTask(5 * 1000, [tcp_listener, cb]() mutable {
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cb(0, SockException(Err_timeout, "wait tcp connection timeout"));
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tcp_listener = nullptr;
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return 0;
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});
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tcp_listener->setOnAccept([weak_self, cb, delay_task](Socket::Ptr &sock, std::shared_ptr<void> &complete) {
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auto strong_self = weak_self.lock();
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if (!strong_self) {
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return;
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}
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//立即关闭tcp服务器
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delay_task->cancel();
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strong_self->_socket = sock;
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strong_self->onConnect();
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cb(sock->get_local_port(), SockException());
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InfoL << "accept connection from:" << sock->get_peer_ip() << ":" << sock->get_peer_port();
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});
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InfoL << "start tcp passive server on:" << tcp_listener->get_local_port();
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} catch (std::exception &ex) {
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cb(0, SockException(Err_other, ex.what()));
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return;
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}
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return;
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}
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if (args.is_udp) {
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auto poller = _poller;
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WorkThreadPool::Instance().getPoller()->async([cb, args, weak_self, poller]() {
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struct sockaddr_storage addr;
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//切换线程目的是为了dns解析放在后台线程执行
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if (!SockUtil::getDomainIP(args.dst_url.data(), args.dst_port, addr, AF_INET, SOCK_DGRAM, IPPROTO_UDP)) {
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poller->async([args, cb]() {
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//切回自己的线程
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cb(0, SockException(Err_dns, StrPrinter << "dns解析域名失败:" << args.dst_url));
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});
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return;
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}
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//dns解析成功
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poller->async([args, addr, weak_self, cb]() {
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//切回自己的线程
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auto strong_self = weak_self.lock();
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if (!strong_self) {
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return;
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}
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string ifr_ip = addr.ss_family == AF_INET ? "0.0.0.0" : "::";
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try {
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if (args.src_port) {
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//指定端口
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if (!strong_self->_socket->bindUdpSock(args.src_port, ifr_ip)) {
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throw std::invalid_argument(StrPrinter << "bindUdpSock failed on port:" << args.src_port
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<< ", err:" << get_uv_errmsg(true));
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}
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} else {
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auto pr = std::make_pair(strong_self->_socket, Socket::createSocket(strong_self->_poller, false));
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//从端口池获取随机端口
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makeSockPair(pr, ifr_ip, true);
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}
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} catch (std::exception &ex) {
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cb(0, SockException(Err_other, ex.what()));
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return;
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}
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strong_self->_socket->bindPeerAddr((struct sockaddr *)&addr);
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strong_self->onConnect();
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cb(strong_self->_socket->get_local_port(), SockException());
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});
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});
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} else {
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_socket->connect(args.dst_url, args.dst_port, [cb, weak_self](const SockException &err) {
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auto strong_self = weak_self.lock();
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if (strong_self) {
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if (!err) {
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//tcp连接成功
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strong_self->onConnect();
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}
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cb(strong_self->_socket->get_local_port(), err);
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} else {
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cb(0, err);
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}
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}, 5.0F, "::", args.src_port);
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}
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}
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void RtpSender::onConnect(){
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_is_connect = true;
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//加大发送缓存,防止udp丢包之类的问题
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SockUtil::setSendBuf(_socket->rawFD(), 4 * 1024 * 1024);
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if (!_args.is_udp) {
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//关闭tcp no_delay并开启MSG_MORE, 提高发送性能
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SockUtil::setNoDelay(_socket->rawFD(), false);
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_socket->setSendFlags(SOCKET_DEFAULE_FLAGS | FLAG_MORE);
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}
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//连接建立成功事件
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weak_ptr<RtpSender> weak_self = shared_from_this();
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_socket->setOnErr([weak_self](const SockException &err) {
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auto strong_self = weak_self.lock();
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if (strong_self) {
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strong_self->onErr(err);
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}
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});
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//获取本地端口，断开重连后确保端口不变
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_args.src_port = _socket->get_local_port();
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InfoL << "开始发送 rtp:" << _socket->get_peer_ip() << ":" << _socket->get_peer_port() << ", 是否为udp方式:" << _args.is_udp;
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}
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bool RtpSender::addTrack(const Track::Ptr &track){
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return _interface->addTrack(track);
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}
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void RtpSender::addTrackCompleted(){
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_interface->addTrackCompleted();
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}
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void RtpSender::resetTracks(){
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_interface->resetTracks();
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}
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//此函数在其他线程执行
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bool RtpSender::inputFrame(const Frame::Ptr &frame) {
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//连接成功后才做实质操作(节省cpu资源)
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return _is_connect ? _interface->inputFrame(frame) : false;
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}
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//此函数在其他线程执行
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void RtpSender::onFlushRtpList(shared_ptr<List<Buffer::Ptr> > rtp_list) {
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if(!_is_connect){
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//连接成功后才能发送数据
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return;
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}
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auto is_udp = _args.is_udp;
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auto socket = _socket;
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_poller->async([rtp_list, is_udp, socket]() {
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size_t i = 0;
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auto size = rtp_list->size();
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rtp_list->for_each([&](Buffer::Ptr &packet) {
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if (is_udp) {
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//udp模式，rtp over tcp前4个字节可以忽略
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socket->send(std::make_shared<BufferRtp>(std::move(packet), 4), nullptr, 0, ++i == size);
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} else {
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//tcp模式, rtp over tcp前2个字节可以忽略,只保留后续rtp长度的2个字节
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socket->send(std::make_shared<BufferRtp>(std::move(packet), 2), nullptr, 0, ++i == size);
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}
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});
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});
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}
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void RtpSender::onErr(const SockException &ex, bool is_connect) {
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_is_connect = false;
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if (_args.passive) {
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WarnL << "tcp passive connection lost: " << ex.what();
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} else {
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//监听socket断开事件，方便重连
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if (is_connect) {
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WarnL << "重连" << _args.dst_url << ":" << _args.dst_port << "失败, 原因为:" << ex.what();
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} else {
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WarnL << "停止发送 rtp:" << _args.dst_url << ":" << _args.dst_port << ", 原因为:" << ex.what();
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}
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}
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weak_ptr<RtpSender> weak_self = shared_from_this();
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_connect_timer = std::make_shared<Timer>(10.0f, [weak_self]() {
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auto strong_self = weak_self.lock();
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if (!strong_self) {
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return false;
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}
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strong_self->startSend(strong_self->_args, [weak_self](uint16_t local_port, const SockException &ex){
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auto strong_self = weak_self.lock();
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if (strong_self && ex) {
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//连接失败且本对象未销毁，那么重试连接
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strong_self->onErr(ex, true);
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}
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});
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return false;
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}, _poller);
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}
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}//namespace mediakit
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#endif// defined(ENABLE_RTPPROXY)
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