mirror of
https://github.com/ZLMediaKit/ZLMediaKit.git
synced 2024-10-07 04:33:57 +08:00
553 lines
20 KiB
C++
553 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/xiongziliang/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 "RtmpSession.h"
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#include "Common/config.h"
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#include "Util/onceToken.h"
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namespace mediakit {
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RtmpSession::RtmpSession(const Socket::Ptr &pSock) : TcpSession(pSock) {
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DebugP(this);
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GET_CONFIG(uint32_t,keep_alive_sec,Rtmp::kKeepAliveSecond);
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pSock->setSendTimeOutSecond(keep_alive_sec);
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//起始接收buffer缓存设置为4K，节省内存
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pSock->setReadBuffer(std::make_shared<BufferRaw>(4 * 1024));
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}
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RtmpSession::~RtmpSession() {
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DebugP(this);
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}
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void RtmpSession::onError(const SockException& err) {
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bool isPlayer = !_pPublisherSrc;
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uint64_t duration = _ticker.createdTime()/1000;
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WarnP(this) << (isPlayer ? "RTMP播放器(" : "RTMP推流器(")
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<< _mediaInfo._vhost << "/"
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<< _mediaInfo._app << "/"
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<< _mediaInfo._streamid
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<< ")断开:" << err.what()
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<< ",耗时(s):" << duration;
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//流量统计事件广播
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GET_CONFIG(uint32_t,iFlowThreshold,General::kFlowThreshold);
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if(_ui64TotalBytes > iFlowThreshold * 1024){
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NoticeCenter::Instance().emitEvent(Broadcast::kBroadcastFlowReport, _mediaInfo, _ui64TotalBytes, duration, isPlayer, static_cast<SockInfo &>(*this));
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}
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}
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void RtmpSession::onManager() {
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GET_CONFIG(uint32_t,handshake_sec,Rtmp::kHandshakeSecond);
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GET_CONFIG(uint32_t,keep_alive_sec,Rtmp::kKeepAliveSecond);
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if (_ticker.createdTime() > handshake_sec * 1000) {
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if (!_pRingReader && !_pPublisherSrc) {
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shutdown(SockException(Err_timeout,"illegal connection"));
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}
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}
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if (_pPublisherSrc) {
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//publisher
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if (_ticker.elapsedTime() > keep_alive_sec * 1000) {
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shutdown(SockException(Err_timeout,"recv data from rtmp pusher timeout"));
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}
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}
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}
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void RtmpSession::onRecv(const Buffer::Ptr &pBuf) {
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_ticker.resetTime();
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try {
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_ui64TotalBytes += pBuf->size();
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onParseRtmp(pBuf->data(), pBuf->size());
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} catch (exception &e) {
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shutdown(SockException(Err_shutdown, e.what()));
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}
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}
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void RtmpSession::onCmd_connect(AMFDecoder &dec) {
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auto params = dec.load<AMFValue>();
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double amfVer = 0;
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AMFValue objectEncoding = params["objectEncoding"];
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if(objectEncoding){
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amfVer = objectEncoding.as_number();
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}
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///////////set chunk size////////////////
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sendChunkSize(60000);
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////////////window Acknowledgement size/////
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sendAcknowledgementSize(5000000);
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///////////set peerBandwidth////////////////
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sendPeerBandwidth(5000000);
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_mediaInfo._app = params["app"].as_string();
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_strTcUrl = params["tcUrl"].as_string();
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if(_strTcUrl.empty()){
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//defaultVhost:默认vhost
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_strTcUrl = string(RTMP_SCHEMA) + "://" + DEFAULT_VHOST + "/" + _mediaInfo._app;
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}
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bool ok = true; //(app == APP_NAME);
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AMFValue version(AMF_OBJECT);
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version.set("fmsVer", "FMS/3,0,1,123");
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version.set("capabilities", 31.0);
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AMFValue status(AMF_OBJECT);
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status.set("level", ok ? "status" : "error");
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status.set("code", ok ? "NetConnection.Connect.Success" : "NetConnection.Connect.InvalidApp");
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status.set("description", ok ? "Connection succeeded." : "InvalidApp.");
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status.set("objectEncoding", amfVer);
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sendReply(ok ? "_result" : "_error", version, status);
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if (!ok) {
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throw std::runtime_error("Unsupported application: " + _mediaInfo._app);
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}
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AMFEncoder invoke;
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invoke << "onBWDone" << 0.0 << nullptr;
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sendResponse(MSG_CMD, invoke.data());
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}
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void RtmpSession::onCmd_createStream(AMFDecoder &dec) {
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sendReply("_result", nullptr, double(STREAM_MEDIA));
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}
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void RtmpSession::onCmd_publish(AMFDecoder &dec) {
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std::shared_ptr<Ticker> pTicker(new Ticker);
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weak_ptr<RtmpSession> weakSelf = dynamic_pointer_cast<RtmpSession>(shared_from_this());
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std::shared_ptr<onceToken> pToken(new onceToken(nullptr,[pTicker,weakSelf](){
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auto strongSelf = weakSelf.lock();
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if(strongSelf){
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DebugP(strongSelf.get()) << "publish 回复时间:" << pTicker->elapsedTime() << "ms";
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}
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}));
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dec.load<AMFValue>();/* NULL */
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_mediaInfo.parse(_strTcUrl + "/" + getStreamId(dec.load<std::string>()));
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_mediaInfo._schema = RTMP_SCHEMA;
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auto onRes = [this,pToken](const string &err,bool enableRtxp,bool enableHls,bool enableMP4){
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auto src = dynamic_pointer_cast<RtmpMediaSource>(MediaSource::find(RTMP_SCHEMA,
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_mediaInfo._vhost,
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_mediaInfo._app,
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_mediaInfo._streamid,
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false));
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bool authSuccess = err.empty();
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bool ok = (!src && !_pPublisherSrc && authSuccess);
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AMFValue status(AMF_OBJECT);
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status.set("level", ok ? "status" : "error");
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status.set("code", ok ? "NetStream.Publish.Start" : (authSuccess ? "NetStream.Publish.BadName" : "NetStream.Publish.BadAuth"));
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status.set("description", ok ? "Started publishing stream." : (authSuccess ? "Already publishing." : err.data()));
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status.set("clientid", "0");
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sendReply("onStatus", nullptr, status);
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if (!ok) {
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string errMsg = StrPrinter << (authSuccess ? "already publishing:" : err.data()) << " "
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<< _mediaInfo._vhost << " "
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<< _mediaInfo._app << " "
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<< _mediaInfo._streamid;
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shutdown(SockException(Err_shutdown,errMsg));
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return;
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}
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_pPublisherSrc.reset(new RtmpMediaSourceImp(_mediaInfo._vhost,_mediaInfo._app,_mediaInfo._streamid));
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_pPublisherSrc->setListener(dynamic_pointer_cast<MediaSourceEvent>(shared_from_this()));
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//设置转协议
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_pPublisherSrc->setProtocolTranslation(enableRtxp,enableHls,enableMP4);
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//如果是rtmp推流客户端，那么加大TCP接收缓存，这样能提升接收性能
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_sock->setReadBuffer(std::make_shared<BufferRaw>(256 * 1024));
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setSocketFlags();
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};
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Broadcast::PublishAuthInvoker invoker = [weakSelf,onRes,pToken](const string &err,bool enableRtxp,bool enableHls,bool enableMP4){
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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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strongSelf->async([weakSelf,onRes,err,pToken,enableRtxp,enableHls,enableMP4](){
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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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onRes(err,enableRtxp,enableHls,enableMP4);
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});
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};
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auto flag = NoticeCenter::Instance().emitEvent(Broadcast::kBroadcastMediaPublish,_mediaInfo,invoker,static_cast<SockInfo &>(*this));
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if(!flag){
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//该事件无人监听，默认鉴权成功
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GET_CONFIG(bool,toRtxp,General::kPublishToRtxp);
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GET_CONFIG(bool,toHls,General::kPublishToHls);
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GET_CONFIG(bool,toMP4,General::kPublishToMP4);
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onRes("",toRtxp,toHls,toMP4);
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}
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}
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void RtmpSession::onCmd_deleteStream(AMFDecoder &dec) {
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AMFValue status(AMF_OBJECT);
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status.set("level", "status");
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status.set("code", "NetStream.Unpublish.Success");
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status.set("description", "Stop publishing.");
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sendReply("onStatus", nullptr, status);
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throw std::runtime_error(StrPrinter << "Stop publishing" << endl);
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}
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void RtmpSession::sendPlayResponse(const string &err,const RtmpMediaSource::Ptr &src){
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bool authSuccess = err.empty();
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bool ok = (src.operator bool() && authSuccess);
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if (ok) {
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//stream begin
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sendUserControl(CONTROL_STREAM_BEGIN, STREAM_MEDIA);
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}
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// onStatus(NetStream.Play.Reset)
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AMFValue status(AMF_OBJECT);
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status.set("level", ok ? "status" : "error");
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status.set("code", ok ? "NetStream.Play.Reset" : (authSuccess ? "NetStream.Play.StreamNotFound" : "NetStream.Play.BadAuth"));
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status.set("description", ok ? "Resetting and playing." : (authSuccess ? "No such stream." : err.data()));
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status.set("details", _mediaInfo._streamid);
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status.set("clientid", "0");
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sendReply("onStatus", nullptr, status);
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if (!ok) {
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string errMsg = StrPrinter << (authSuccess ? "no such stream:" : err.data()) << " "
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<< _mediaInfo._vhost << " "
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<< _mediaInfo._app << " "
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<< _mediaInfo._streamid;
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shutdown(SockException(Err_shutdown,errMsg));
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return;
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}
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// onStatus(NetStream.Play.Start)
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status.clear();
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status.set("level", "status");
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status.set("code", "NetStream.Play.Start");
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status.set("description", "Started playing.");
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status.set("details", _mediaInfo._streamid);
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status.set("clientid", "0");
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sendReply("onStatus", nullptr, status);
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// |RtmpSampleAccess(true, true)
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AMFEncoder invoke;
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invoke << "|RtmpSampleAccess" << true << true;
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sendResponse(MSG_DATA, invoke.data());
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//onStatus(NetStream.Data.Start)
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invoke.clear();
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AMFValue obj(AMF_OBJECT);
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obj.set("code", "NetStream.Data.Start");
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invoke << "onStatus" << obj;
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sendResponse(MSG_DATA, invoke.data());
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//onStatus(NetStream.Play.PublishNotify)
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status.clear();
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status.set("level", "status");
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status.set("code", "NetStream.Play.PublishNotify");
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status.set("description", "Now published.");
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status.set("details", _mediaInfo._streamid);
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status.set("clientid", "0");
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sendReply("onStatus", nullptr, status);
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auto &metadata = src->getMetaData();
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if(metadata){
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//在有metadata的情况下才发送metadata
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//其实metadata没什么用，有些推流器不产生metadata
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// onMetaData
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invoke.clear();
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invoke << "onMetaData" << metadata;
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sendResponse(MSG_DATA, invoke.data());
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auto duration = metadata["duration"].as_number();
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if(duration > 0){
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//这是点播，使用绝对时间戳
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_stamp[0].setPlayBack();
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_stamp[1].setPlayBack();
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}
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}
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src->getConfigFrame([&](const RtmpPacket::Ptr &pkt) {
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//DebugP(this)<<"send initial frame";
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onSendMedia(pkt);
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});
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_pRingReader = src->getRing()->attach(getPoller());
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weak_ptr<RtmpSession> weakSelf = dynamic_pointer_cast<RtmpSession>(shared_from_this());
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_pRingReader->setReadCB([weakSelf](const RtmpMediaSource::RingDataType &pkt) {
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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(strongSelf->_paused){
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return;
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}
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int i = 0;
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int size = pkt->size();
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strongSelf->setSendFlushFlag(false);
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pkt->for_each([&](const RtmpPacket::Ptr &rtmp){
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if(++i == size){
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strongSelf->setSendFlushFlag(true);
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}
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strongSelf->onSendMedia(rtmp);
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});
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});
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_pRingReader->setDetachCB([weakSelf]() {
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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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strongSelf->shutdown(SockException(Err_shutdown,"rtmp ring buffer detached"));
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});
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_pPlayerSrc = src;
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if (src->totalReaderCount() == 1) {
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src->seekTo(0);
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}
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//提高服务器发送性能
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setSocketFlags();
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}
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void RtmpSession::doPlayResponse(const string &err,const std::function<void(bool)> &cb){
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if(!err.empty()){
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//鉴权失败，直接返回播放失败
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sendPlayResponse(err, nullptr);
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cb(false);
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return;
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}
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//鉴权成功，查找媒体源并回复
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weak_ptr<RtmpSession> weakSelf = dynamic_pointer_cast<RtmpSession>(shared_from_this());
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MediaSource::findAsync(_mediaInfo,weakSelf.lock(),[weakSelf,cb](const MediaSource::Ptr &src){
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auto rtmp_src = dynamic_pointer_cast<RtmpMediaSource>(src);
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auto strongSelf = weakSelf.lock();
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if(strongSelf){
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strongSelf->sendPlayResponse("", rtmp_src);
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}
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cb(rtmp_src.operator bool());
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});
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}
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void RtmpSession::doPlay(AMFDecoder &dec){
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std::shared_ptr<Ticker> pTicker(new Ticker);
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weak_ptr<RtmpSession> weakSelf = dynamic_pointer_cast<RtmpSession>(shared_from_this());
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std::shared_ptr<onceToken> pToken(new onceToken(nullptr,[pTicker,weakSelf](){
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auto strongSelf = weakSelf.lock();
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if(strongSelf) {
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DebugP(strongSelf.get()) << "play 回复时间:" << pTicker->elapsedTime() << "ms";
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}
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}));
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Broadcast::AuthInvoker invoker = [weakSelf,pToken](const string &err){
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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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strongSelf->async([weakSelf,err,pToken](){
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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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strongSelf->doPlayResponse(err,[pToken](bool){});
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});
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};
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auto flag = NoticeCenter::Instance().emitEvent(Broadcast::kBroadcastMediaPlayed,_mediaInfo,invoker,static_cast<SockInfo &>(*this));
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if(!flag){
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//该事件无人监听,默认不鉴权
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doPlayResponse("",[pToken](bool){});
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}
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}
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void RtmpSession::onCmd_play2(AMFDecoder &dec) {
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doPlay(dec);
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}
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string RtmpSession::getStreamId(const string &str){
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string stream_id;
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string params;
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auto pos = str.find('?');
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if(pos != string::npos){
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//有url参数
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stream_id = str.substr(0,pos);
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//获取url参数
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params = str.substr(pos + 1);
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}else{
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//没有url参数
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stream_id = str;
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}
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pos = stream_id.find(":");
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if(pos != string::npos){
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//vlc和ffplay在播放 rtmp://127.0.0.1/record/0.mp4时，
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//传过来的url会是rtmp://127.0.0.1/record/mp4:0,
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//我们在这里还原成0.mp4
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stream_id = stream_id.substr(pos + 1) + "." + stream_id.substr(0,pos);
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}
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if(params.empty()){
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//没有url参数
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return stream_id;
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}
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//有url参数
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return stream_id + '?' + params;
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}
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void RtmpSession::onCmd_play(AMFDecoder &dec) {
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dec.load<AMFValue>();/* NULL */
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_mediaInfo.parse(_strTcUrl + "/" + getStreamId(dec.load<std::string>()));
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_mediaInfo._schema = RTMP_SCHEMA;
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doPlay(dec);
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}
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void RtmpSession::onCmd_pause(AMFDecoder &dec) {
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dec.load<AMFValue>();/* NULL */
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bool paused = dec.load<bool>();
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TraceP(this) << paused;
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AMFValue status(AMF_OBJECT);
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status.set("level", "status");
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status.set("code", paused ? "NetStream.Pause.Notify" : "NetStream.Unpause.Notify");
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status.set("description", paused ? "Paused stream." : "Unpaused stream.");
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sendReply("onStatus", nullptr, status);
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//streamBegin
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sendUserControl(paused ? CONTROL_STREAM_EOF : CONTROL_STREAM_BEGIN, STREAM_MEDIA);
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_paused = paused;
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}
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void RtmpSession::setMetaData(AMFDecoder &dec) {
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if (!_pPublisherSrc) {
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throw std::runtime_error("not a publisher");
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}
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std::string type = dec.load<std::string>();
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if (type != "onMetaData") {
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throw std::runtime_error("can only set metadata");
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}
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auto metadata = dec.load<AMFValue>();
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// dumpMetadata(metadata);
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_pPublisherSrc->setMetaData(metadata);
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_set_meta_data = true;
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}
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void RtmpSession::onProcessCmd(AMFDecoder &dec) {
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typedef void (RtmpSession::*rtmpCMDHandle)(AMFDecoder &dec);
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static unordered_map<string, rtmpCMDHandle> s_cmd_functions;
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static onceToken token([]() {
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s_cmd_functions.emplace("connect",&RtmpSession::onCmd_connect);
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s_cmd_functions.emplace("createStream",&RtmpSession::onCmd_createStream);
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s_cmd_functions.emplace("publish",&RtmpSession::onCmd_publish);
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s_cmd_functions.emplace("deleteStream",&RtmpSession::onCmd_deleteStream);
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s_cmd_functions.emplace("play",&RtmpSession::onCmd_play);
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s_cmd_functions.emplace("play2",&RtmpSession::onCmd_play2);
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s_cmd_functions.emplace("seek",&RtmpSession::onCmd_seek);
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s_cmd_functions.emplace("pause",&RtmpSession::onCmd_pause);}, []() {});
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std::string method = dec.load<std::string>();
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auto it = s_cmd_functions.find(method);
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if (it == s_cmd_functions.end()) {
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// TraceP(this) << "can not support cmd:" << method;
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return;
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}
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_dNowReqID = dec.load<double>();
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auto fun = it->second;
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(this->*fun)(dec);
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}
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void RtmpSession::onRtmpChunk(RtmpPacket &chunkData) {
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switch (chunkData.typeId) {
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case MSG_CMD:
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case MSG_CMD3: {
|
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AMFDecoder dec(chunkData.strBuf, chunkData.typeId == MSG_CMD3 ? 1 : 0);
|
||
onProcessCmd(dec);
|
||
}
|
||
break;
|
||
|
||
case MSG_DATA:
|
||
case MSG_DATA3: {
|
||
AMFDecoder dec(chunkData.strBuf, chunkData.typeId == MSG_CMD3 ? 1 : 0);
|
||
std::string type = dec.load<std::string>();
|
||
if (type == "@setDataFrame") {
|
||
setMetaData(dec);
|
||
}else{
|
||
TraceP(this) << "unknown notify:" << type;
|
||
}
|
||
}
|
||
break;
|
||
case MSG_AUDIO:
|
||
case MSG_VIDEO: {
|
||
if (!_pPublisherSrc) {
|
||
throw std::runtime_error("Not a rtmp publisher!");
|
||
}
|
||
GET_CONFIG(bool,rtmp_modify_stamp,Rtmp::kModifyStamp);
|
||
if(rtmp_modify_stamp){
|
||
int64_t dts_out;
|
||
_stamp[chunkData.typeId % 2].revise(chunkData.timeStamp, chunkData.timeStamp, dts_out, dts_out, true);
|
||
chunkData.timeStamp = dts_out;
|
||
}
|
||
|
||
if(!_set_meta_data && !chunkData.isCfgFrame()){
|
||
_set_meta_data = true;
|
||
_pPublisherSrc->setMetaData(TitleMeta().getMetadata());
|
||
}
|
||
_pPublisherSrc->onWrite(std::make_shared<RtmpPacket>(std::move(chunkData)));
|
||
}
|
||
break;
|
||
default:
|
||
WarnP(this) << "unhandled message:" << (int) chunkData.typeId << hexdump(chunkData.strBuf.data(), chunkData.strBuf.size());
|
||
break;
|
||
}
|
||
}
|
||
|
||
void RtmpSession::onCmd_seek(AMFDecoder &dec) {
|
||
dec.load<AMFValue>();/* NULL */
|
||
AMFValue status(AMF_OBJECT);
|
||
AMFEncoder invoke;
|
||
status.set("level", "status");
|
||
status.set("code", "NetStream.Seek.Notify");
|
||
status.set("description", "Seeking.");
|
||
sendReply("onStatus", nullptr, status);
|
||
|
||
auto milliSeconds = dec.load<AMFValue>().as_number();
|
||
InfoP(this) << "rtmp seekTo(ms):" << milliSeconds;
|
||
auto stongSrc = _pPlayerSrc.lock();
|
||
if (stongSrc) {
|
||
stongSrc->seekTo(milliSeconds);
|
||
}
|
||
}
|
||
|
||
void RtmpSession::onSendMedia(const RtmpPacket::Ptr &pkt) {
|
||
//rtmp播放器时间戳从零开始
|
||
int64_t dts_out;
|
||
_stamp[pkt->typeId % 2].revise(pkt->timeStamp, 0, dts_out, dts_out);
|
||
sendRtmp(pkt->typeId, pkt->streamId, pkt, dts_out, pkt->chunkId);
|
||
}
|
||
|
||
|
||
bool RtmpSession::close(MediaSource &sender,bool force) {
|
||
//此回调在其他线程触发
|
||
if(!_pPublisherSrc || (!force && _pPublisherSrc->totalReaderCount())){
|
||
return false;
|
||
}
|
||
string err = StrPrinter << "close media:" << sender.getSchema() << "/" << sender.getVhost() << "/" << sender.getApp() << "/" << sender.getId() << " " << force;
|
||
safeShutdown(SockException(Err_shutdown,err));
|
||
return true;
|
||
}
|
||
|
||
int RtmpSession::totalReaderCount(MediaSource &sender) {
|
||
return _pPublisherSrc ? _pPublisherSrc->totalReaderCount() : sender.readerCount();
|
||
}
|
||
|
||
void RtmpSession::setSocketFlags(){
|
||
GET_CONFIG(bool,ultraLowDelay,General::kUltraLowDelay);
|
||
if(!ultraLowDelay) {
|
||
//推流模式下，关闭TCP_NODELAY会增加推流端的延时，但是服务器性能将提高
|
||
SockUtil::setNoDelay(_sock->rawFD(), false);
|
||
//播放模式下，开启MSG_MORE会增加延时，但是能提高发送性能
|
||
setSendFlags(SOCKET_DEFAULE_FLAGS | FLAG_MORE);
|
||
}
|
||
}
|
||
|
||
void RtmpSession::dumpMetadata(const AMFValue &metadata) {
|
||
if(metadata.type() != AMF_OBJECT && metadata.type() != AMF_ECMA_ARRAY){
|
||
WarnL << "invalid metadata type:" << metadata.type();
|
||
return ;
|
||
}
|
||
_StrPrinter printer;
|
||
metadata.object_for_each([&](const string &key, const AMFValue &val){
|
||
printer << "\r\n" << key << "\t:" << val.to_string() ;
|
||
});
|
||
InfoL << _mediaInfo._vhost << " " << _mediaInfo._app << " " << _mediaInfo._streamid << (string)printer;
|
||
}
|
||
} /* namespace mediakit */
|