mirror of
https://github.com/ZLMediaKit/ZLMediaKit.git
synced 2024-11-23 11:17:09 +08:00
576 lines
20 KiB
C++
576 lines
20 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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#include "Util/MD5.h"
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#include "Util/base64.h"
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#include "RtspPusher.h"
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#include "RtspSession.h"
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using namespace mediakit::Client;
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namespace mediakit {
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RtspPusher::RtspPusher(const EventPoller::Ptr &poller, const RtspMediaSource::Ptr &src) : TcpClient(poller) {
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_push_src = src;
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}
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RtspPusher::~RtspPusher() {
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teardown();
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DebugL << endl;
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}
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void RtspPusher::sendTeardown(){
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if (alive()) {
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if (!_content_base.empty()) {
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sendRtspRequest("TEARDOWN", _content_base);
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}
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shutdown(SockException(Err_shutdown, "teardown"));
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}
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}
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void RtspPusher::teardown() {
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sendTeardown();
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reset();
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CLEAR_ARR(_rtp_sock);
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CLEAR_ARR(_rtcp_sock);
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_nonce.clear();
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_realm.clear();
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_track_vec.clear();
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_session_id.clear();
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_content_base.clear();
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_session_id.clear();
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_cseq = 1;
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_publish_timer.reset();
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_beat_timer.reset();
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_rtsp_reader.reset();
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_track_vec.clear();
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_on_res_func = nullptr;
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}
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void RtspPusher::publish(const string &url_str) {
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RtspUrl url;
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if (!url.parse(url_str)) {
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onPublishResult(SockException(Err_other, StrPrinter << "illegal rtsp url:" << url_str), false);
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return;
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}
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teardown();
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if (url._user.size()) {
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(*this)[kRtspUser] = url._user;
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}
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if (url._passwd.size()) {
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(*this)[kRtspPwd] = url._passwd;
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(*this)[kRtspPwdIsMD5] = false;
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}
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_url = url_str;
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_rtp_type = (Rtsp::eRtpType) (int) (*this)[kRtpType];
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DebugL << url._url << " " << (url._user.size() ? url._user : "null") << " "
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<< (url._passwd.size() ? url._passwd : "null") << " " << _rtp_type;
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weak_ptr<RtspPusher> weak_self = dynamic_pointer_cast<RtspPusher>(shared_from_this());
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float publish_timeout_sec = (*this)[kTimeoutMS].as<int>() / 1000.0f;
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_publish_timer.reset(new Timer(publish_timeout_sec, [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->onPublishResult(SockException(Err_timeout, "publish rtsp timeout"), false);
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return false;
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}, getPoller()));
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if (!(*this)[kNetAdapter].empty()) {
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setNetAdapter((*this)[kNetAdapter]);
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}
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startConnect(url._host, url._port, publish_timeout_sec);
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}
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void RtspPusher::onPublishResult(const SockException &ex, bool handshake_done) {
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if (ex.getErrCode() == Err_shutdown) {
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//主动shutdown的，不触发回调
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return;
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}
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if (!handshake_done) {
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//播放结果回调
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_publish_timer.reset();
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if (_on_published) {
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_on_published(ex);
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}
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} else {
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//播放成功后异常断开回调
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if (_on_shutdown) {
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_on_shutdown(ex);
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}
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}
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if (ex) {
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sendTeardown();
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}
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}
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void RtspPusher::onErr(const SockException &ex) {
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//定时器_pPublishTimer为空后表明握手结束了
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onPublishResult(ex, !_publish_timer);
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}
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void RtspPusher::onConnect(const SockException &err) {
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if (err) {
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onPublishResult(err, false);
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return;
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}
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sendAnnounce();
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}
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void RtspPusher::onRecv(const Buffer::Ptr &buf){
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try {
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input(buf->data(), buf->size());
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} catch (exception &e) {
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SockException ex(Err_other, e.what());
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//定时器_pPublishTimer为空后表明握手结束了
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onPublishResult(ex, !_publish_timer);
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}
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}
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void RtspPusher::onWholeRtspPacket(Parser &parser) {
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decltype(_on_res_func) func;
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_on_res_func.swap(func);
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if (func) {
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func(parser);
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}
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parser.Clear();
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}
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void RtspPusher::onRtpPacket(const char *data, size_t len) {
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int trackIdx = -1;
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uint8_t interleaved = data[1];
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if (interleaved % 2 != 0) {
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trackIdx = getTrackIndexByInterleaved(interleaved - 1);
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onRtcpPacket(trackIdx, _track_vec[trackIdx], (uint8_t *) data + RtpPacket::kRtpTcpHeaderSize, len - RtpPacket::kRtpTcpHeaderSize);
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}
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}
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void RtspPusher::onRtcpPacket(int track_idx, SdpTrack::Ptr &track, uint8_t *data, size_t len){
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auto rtcp_arr = RtcpHeader::loadFromBytes((char *) data, len);
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for (auto &rtcp : rtcp_arr) {
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_rtcp_context[track_idx]->onRtcp(rtcp);
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}
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}
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void RtspPusher::sendAnnounce() {
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auto src = _push_src.lock();
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if (!src) {
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throw std::runtime_error("the media source was released");
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}
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//解析sdp
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_sdp_parser.load(src->getSdp());
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_track_vec = _sdp_parser.getAvailableTrack();
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if (_track_vec.empty()) {
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throw std::runtime_error("无有效的Sdp Track");
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}
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_rtcp_context.clear();
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for (auto &track : _track_vec) {
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_rtcp_context.emplace_back(std::make_shared<RtcpContext>(track->_samplerate, false));
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}
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_on_res_func = std::bind(&RtspPusher::handleResAnnounce, this, placeholders::_1);
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sendRtspRequest("ANNOUNCE", _url, {}, src->getSdp());
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}
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void RtspPusher::handleResAnnounce(const Parser &parser) {
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string authInfo = parser["WWW-Authenticate"];
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//发送DESCRIBE命令后的回复
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if ((parser.Url() == "401") && handleAuthenticationFailure(authInfo)) {
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sendAnnounce();
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return;
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}
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if (parser.Url() == "302") {
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auto newUrl = parser["Location"];
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if (newUrl.empty()) {
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throw std::runtime_error("未找到Location字段(跳转url)");
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}
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publish(newUrl);
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return;
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}
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if (parser.Url() != "200") {
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throw std::runtime_error(StrPrinter << "ANNOUNCE:" << parser.Url() << " " << parser.Tail());
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}
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_content_base = parser["Content-Base"];
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if (_content_base.empty()) {
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_content_base = _url;
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}
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if (_content_base.back() == '/') {
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_content_base.pop_back();
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}
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sendSetup(0);
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}
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bool RtspPusher::handleAuthenticationFailure(const string ¶ms_str) {
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if (!_realm.empty()) {
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//已经认证过了
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return false;
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}
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char *realm = new char[params_str.size()];
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char *nonce = new char[params_str.size()];
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char *stale = new char[params_str.size()];
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onceToken token(nullptr, [&]() {
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delete[] realm;
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delete[] nonce;
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delete[] stale;
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});
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if (sscanf(params_str.data(), "Digest realm=\"%[^\"]\", nonce=\"%[^\"]\", stale=%[a-zA-Z]", realm, nonce, stale) == 3) {
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_realm = (const char *) realm;
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_nonce = (const char *) nonce;
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return true;
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}
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if (sscanf(params_str.data(), "Digest realm=\"%[^\"]\", nonce=\"%[^\"]\"", realm, nonce) == 2) {
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_realm = (const char *) realm;
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_nonce = (const char *) nonce;
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return true;
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}
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if (sscanf(params_str.data(), "Basic realm=\"%[^\"]\"", realm) == 1) {
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_realm = (const char *) realm;
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return true;
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}
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return false;
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}
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//有必要的情况下创建udp端口
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void RtspPusher::createUdpSockIfNecessary(int track_idx){
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auto &rtpSockRef = _rtp_sock[track_idx];
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auto &rtcpSockRef = _rtcp_sock[track_idx];
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if (!rtpSockRef || !rtcpSockRef) {
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std::pair<Socket::Ptr, Socket::Ptr> pr = std::make_pair(createSocket(), createSocket());
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makeSockPair(pr, get_local_ip());
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rtpSockRef = pr.first;
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rtcpSockRef = pr.second;
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}
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}
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void RtspPusher::sendSetup(unsigned int track_idx) {
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_on_res_func = std::bind(&RtspPusher::handleResSetup, this, placeholders::_1, track_idx);
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auto &track = _track_vec[track_idx];
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auto base_url = _content_base + "/" + track->_control_surffix;
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if (track->_control.find("://") != string::npos) {
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base_url = track->_control;
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}
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switch (_rtp_type) {
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case Rtsp::RTP_TCP: {
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sendRtspRequest("SETUP", base_url, {"Transport",
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StrPrinter << "RTP/AVP/TCP;unicast;interleaved=" << track->_type * 2
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<< "-" << track->_type * 2 + 1});
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}
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break;
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case Rtsp::RTP_UDP: {
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createUdpSockIfNecessary(track_idx);
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int port = _rtp_sock[track_idx]->get_local_port();
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sendRtspRequest("SETUP", base_url,
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{"Transport", StrPrinter << "RTP/AVP;unicast;client_port=" << port << "-" << port + 1});
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}
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break;
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default:
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break;
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}
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}
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void RtspPusher::handleResSetup(const Parser &parser, unsigned int track_idx) {
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if (parser.Url() != "200") {
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throw std::runtime_error(StrPrinter << "SETUP:" << parser.Url() << " " << parser.Tail() << endl);
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}
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if (track_idx == 0) {
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_session_id = parser["Session"];
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_session_id.append(";");
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_session_id = FindField(_session_id.data(), nullptr, ";");
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}
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auto transport = parser["Transport"];
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if (transport.find("TCP") != string::npos || transport.find("interleaved") != string::npos) {
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_rtp_type = Rtsp::RTP_TCP;
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string interleaved = FindField(FindField((transport + ";").data(), "interleaved=", ";").data(), NULL, "-");
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_track_vec[track_idx]->_interleaved = atoi(interleaved.data());
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} else if (transport.find("multicast") != string::npos) {
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throw std::runtime_error("SETUP rtsp pusher can not support multicast!");
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} else {
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_rtp_type = Rtsp::RTP_UDP;
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createUdpSockIfNecessary(track_idx);
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const char *strPos = "server_port=";
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auto port_str = FindField((transport + ";").data(), strPos, ";");
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uint16_t rtp_port = atoi(FindField(port_str.data(), NULL, "-").data());
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uint16_t rtcp_port = atoi(FindField(port_str.data(), "-", NULL).data());
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auto &rtp_sock = _rtp_sock[track_idx];
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auto &rtcp_sock = _rtcp_sock[track_idx];
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struct sockaddr_in rtpto;
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//设置rtp发送目标，为后续发送rtp做准备
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rtpto.sin_port = ntohs(rtp_port);
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rtpto.sin_family = AF_INET;
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rtpto.sin_addr.s_addr = inet_addr(get_peer_ip().data());
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rtp_sock->setSendPeerAddr((struct sockaddr *) &(rtpto));
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//设置rtcp发送目标，为后续发送rtcp做准备
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rtpto.sin_port = ntohs(rtcp_port);
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rtpto.sin_family = AF_INET;
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rtpto.sin_addr.s_addr = inet_addr(get_peer_ip().data());
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rtcp_sock->setSendPeerAddr((struct sockaddr *)&(rtpto));
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auto srcIP = inet_addr(get_peer_ip().data());
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weak_ptr<RtspPusher> weakSelf = dynamic_pointer_cast<RtspPusher>(shared_from_this());
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if(rtcp_sock) {
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//设置rtcp over udp接收回调处理函数
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rtcp_sock->setOnRead([srcIP, track_idx, weakSelf](const Buffer::Ptr &buf, struct sockaddr *addr , int addr_len) {
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auto strongSelf = weakSelf.lock();
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if (!strongSelf) {
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return;
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}
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if (((struct sockaddr_in *) addr)->sin_addr.s_addr != srcIP) {
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WarnL << "收到其他地址的rtcp数据:" << SockUtil::inet_ntoa(((struct sockaddr_in *) addr)->sin_addr);
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return;
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}
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strongSelf->onRtcpPacket(track_idx, strongSelf->_track_vec[track_idx], (uint8_t *) buf->data(), buf->size());
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});
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}
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}
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RtspSplitter::enableRecvRtp(_rtp_type == Rtsp::RTP_TCP);
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if (track_idx < _track_vec.size() - 1) {
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//需要继续发送SETUP命令
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sendSetup(track_idx + 1);
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return;
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}
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sendRecord();
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}
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void RtspPusher::sendOptions() {
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_on_res_func = [](const Parser &parser) {};
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sendRtspRequest("OPTIONS", _content_base);
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}
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void RtspPusher::updateRtcpContext(const RtpPacket::Ptr &rtp){
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int track_index = getTrackIndexByTrackType(rtp->type);
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auto &ticker = _rtcp_send_ticker[track_index];
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auto &rtcp_ctx = _rtcp_context[track_index];
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rtcp_ctx->onRtp(rtp->getSeq(), rtp->getStampMS(), rtp->size() - RtpPacket::kRtpTcpHeaderSize);
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//send rtcp every 5 second
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if (ticker.elapsedTime() > 5 * 1000) {
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ticker.resetTime();
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static auto send_rtcp = [](RtspPusher *thiz, int index, Buffer::Ptr ptr) {
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if (thiz->_rtp_type == Rtsp::RTP_TCP) {
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auto &track = thiz->_track_vec[index];
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thiz->send(makeRtpOverTcpPrefix((uint16_t) (ptr->size()), track->_interleaved + 1));
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thiz->send(std::move(ptr));
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} else {
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thiz->_rtcp_sock[index]->send(std::move(ptr));
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}
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};
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auto ssrc = rtp->getSSRC();
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auto rtcp = rtcp_ctx->createRtcpSR(ssrc + 1);
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auto rtcp_sdes = RtcpSdes::create({SERVER_NAME});
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rtcp_sdes->items.type = (uint8_t) SdesType::RTCP_SDES_CNAME;
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rtcp_sdes->items.ssrc = htonl(ssrc);
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send_rtcp(this, track_index, std::move(rtcp));
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send_rtcp(this, track_index, RtcpHeader::toBuffer(rtcp_sdes));
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}
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}
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void RtspPusher::sendRtpPacket(const RtspMediaSource::RingDataType &pkt) {
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switch (_rtp_type) {
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case Rtsp::RTP_TCP: {
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size_t i = 0;
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auto size = pkt->size();
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setSendFlushFlag(false);
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pkt->for_each([&](const RtpPacket::Ptr &rtp) {
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updateRtcpContext(rtp);
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if (++i == size) {
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setSendFlushFlag(true);
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}
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BufferRtp::Ptr buffer(new BufferRtp(rtp));
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send(std::move(buffer));
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});
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break;
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}
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case Rtsp::RTP_UDP: {
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size_t i = 0;
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auto size = pkt->size();
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pkt->for_each([&](const RtpPacket::Ptr &rtp) {
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updateRtcpContext(rtp);
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int iTrackIndex = getTrackIndexByTrackType(rtp->type);
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auto &pSock = _rtp_sock[iTrackIndex];
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if (!pSock) {
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shutdown(SockException(Err_shutdown, "udp sock not opened yet"));
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return;
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}
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BufferRtp::Ptr buffer(new BufferRtp(rtp, 4));
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pSock->send(std::move(buffer), nullptr, 0, ++i == size);
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});
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break;
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}
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default : break;
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}
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}
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int RtspPusher::getTrackIndexByInterleaved(int interleaved) const {
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for (int i = 0; i < (int)_track_vec.size(); ++i) {
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if (_track_vec[i]->_interleaved == interleaved) {
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return i;
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}
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}
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if (_track_vec.size() == 1) {
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return 0;
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}
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throw SockException(Err_shutdown, StrPrinter << "no such track with interleaved:" << interleaved);
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}
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int RtspPusher::getTrackIndexByTrackType(TrackType type) const{
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for (int i = 0; i < (int)_track_vec.size(); ++i) {
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if (type == _track_vec[i]->_type) {
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return i;
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}
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}
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if (_track_vec.size() == 1) {
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return 0;
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}
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throw SockException(Err_shutdown, StrPrinter << "no such track with type:" << (int) type);
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}
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void RtspPusher::sendRecord() {
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_on_res_func = [this](const Parser &parser) {
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auto src = _push_src.lock();
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if (!src) {
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throw std::runtime_error("the media source was released");
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}
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_rtsp_reader = src->getRing()->attach(getPoller());
|
||
weak_ptr<RtspPusher> weak_self = dynamic_pointer_cast<RtspPusher>(shared_from_this());
|
||
_rtsp_reader->setReadCB([weak_self](const RtspMediaSource::RingDataType &pkt) {
|
||
auto strong_self = weak_self.lock();
|
||
if (!strong_self) {
|
||
return;
|
||
}
|
||
strong_self->sendRtpPacket(pkt);
|
||
});
|
||
_rtsp_reader->setDetachCB([weak_self]() {
|
||
auto strong_self = weak_self.lock();
|
||
if (strong_self) {
|
||
strong_self->onPublishResult(SockException(Err_other, "媒体源被释放"), !strong_self->_publish_timer);
|
||
}
|
||
});
|
||
if (_rtp_type != Rtsp::RTP_TCP) {
|
||
/////////////////////////心跳/////////////////////////////////
|
||
_beat_timer.reset(new Timer((*this)[kBeatIntervalMS].as<int>() / 1000.0f, [weak_self]() {
|
||
auto strong_self = weak_self.lock();
|
||
if (!strong_self) {
|
||
return false;
|
||
}
|
||
strong_self->sendOptions();
|
||
return true;
|
||
}, getPoller()));
|
||
}
|
||
onPublishResult(SockException(Err_success, "success"), false);
|
||
//提升发送性能
|
||
setSocketFlags();
|
||
};
|
||
sendRtspRequest("RECORD", _content_base, {"Range", "npt=0.000-"});
|
||
}
|
||
|
||
void RtspPusher::setSocketFlags(){
|
||
GET_CONFIG(int, merge_write_ms, General::kMergeWriteMS);
|
||
if (merge_write_ms > 0) {
|
||
//提高发送性能
|
||
setSendFlags(SOCKET_DEFAULE_FLAGS | FLAG_MORE);
|
||
SockUtil::setNoDelay(getSock()->rawFD(), false);
|
||
}
|
||
}
|
||
|
||
void RtspPusher::sendRtspRequest(const string &cmd, const string &url, const std::initializer_list<string> &header,const string &sdp ) {
|
||
string key;
|
||
StrCaseMap header_map;
|
||
int i = 0;
|
||
for (auto &val : header) {
|
||
if (++i % 2 == 0) {
|
||
header_map.emplace(key, val);
|
||
} else {
|
||
key = val;
|
||
}
|
||
}
|
||
sendRtspRequest(cmd, url, header_map, sdp);
|
||
}
|
||
void RtspPusher::sendRtspRequest(const string &cmd, const string &url,const StrCaseMap &header_const,const string &sdp ) {
|
||
auto header = header_const;
|
||
header.emplace("CSeq", StrPrinter << _cseq++);
|
||
header.emplace("User-Agent", SERVER_NAME);
|
||
|
||
if (!_session_id.empty()) {
|
||
header.emplace("Session", _session_id);
|
||
}
|
||
|
||
if (!_realm.empty() && !(*this)[kRtspUser].empty()) {
|
||
if (!_nonce.empty()) {
|
||
//MD5认证
|
||
/*
|
||
response计算方法如下：
|
||
RTSP客户端应该使用username + password并计算response如下:
|
||
(1)当password为MD5编码,则
|
||
response = md5( password:nonce:md5(public_method:url) );
|
||
(2)当password为ANSI字符串,则
|
||
response= md5( md5(username:realm:password):nonce:md5(public_method:url) );
|
||
*/
|
||
string encrypted_pwd = (*this)[kRtspPwd];
|
||
if (!(*this)[kRtspPwdIsMD5].as<bool>()) {
|
||
encrypted_pwd = MD5((*this)[kRtspUser] + ":" + _realm + ":" + encrypted_pwd).hexdigest();
|
||
}
|
||
auto response = MD5(encrypted_pwd + ":" + _nonce + ":" + MD5(cmd + ":" + url).hexdigest()).hexdigest();
|
||
_StrPrinter printer;
|
||
printer << "Digest ";
|
||
printer << "username=\"" << (*this)[kRtspUser] << "\", ";
|
||
printer << "realm=\"" << _realm << "\", ";
|
||
printer << "nonce=\"" << _nonce << "\", ";
|
||
printer << "uri=\"" << url << "\", ";
|
||
printer << "response=\"" << response << "\"";
|
||
header.emplace("Authorization", printer);
|
||
} else if (!(*this)[kRtspPwdIsMD5].as<bool>()) {
|
||
//base64认证
|
||
string authStr = StrPrinter << (*this)[kRtspUser] << ":" << (*this)[kRtspPwd];
|
||
char authStrBase64[1024] = {0};
|
||
av_base64_encode(authStrBase64, sizeof(authStrBase64), (uint8_t *) authStr.data(), (int)authStr.size());
|
||
header.emplace("Authorization", StrPrinter << "Basic " << authStrBase64);
|
||
}
|
||
}
|
||
|
||
if (!sdp.empty()) {
|
||
header.emplace("Content-Length", StrPrinter << sdp.size());
|
||
header.emplace("Content-Type", "application/sdp");
|
||
}
|
||
|
||
_StrPrinter printer;
|
||
printer << cmd << " " << url << " RTSP/1.0\r\n";
|
||
for (auto &pr : header) {
|
||
printer << pr.first << ": " << pr.second << "\r\n";
|
||
}
|
||
|
||
printer << "\r\n";
|
||
|
||
if (!sdp.empty()) {
|
||
printer << sdp;
|
||
}
|
||
SockSender::send(std::move(printer));
|
||
}
|
||
|
||
|
||
} /* namespace mediakit */ |