ZLMediaKit/src/Rtmp/RtmpSession.cpp

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/*
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* MIT License
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*
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* Copyright (c) 2016 xiongziliang <771730766@qq.com>
*
* This file is part of ZLMediaKit(https://github.com/xiongziliang/ZLMediaKit).
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
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*/
#include "RtmpSession.h"
#include "Common/config.h"
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#include "Util/onceToken.h"
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namespace mediakit {
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static int kSockFlags = SOCKET_DEFAULE_FLAGS | FLAG_MORE;
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RtmpSession::RtmpSession(const Socket::Ptr &pSock) : TcpSession(pSock) {
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DebugL << get_peer_ip();
//设置15秒发送超时时间
pSock->setSendTimeOutSecond(15);
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}
RtmpSession::~RtmpSession() {
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DebugL << get_peer_ip();
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if(_delayTask){
_delayTask();
_delayTask = nullptr;
}
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}
void RtmpSession::onError(const SockException& err) {
DebugL << err.what();
//流量统计事件广播
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GET_CONFIG_AND_REGISTER(uint32_t,iFlowThreshold,Broadcast::kFlowThreshold);
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if(_ui64TotalBytes > iFlowThreshold * 1024){
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NoticeCenter::Instance().emitEvent(Broadcast::kBroadcastFlowReport,
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_mediaInfo,
_ui64TotalBytes,
_ticker.createdTime()/1000,
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*this);
}
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}
void RtmpSession::onManager() {
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if (_ticker.createdTime() > 15 * 1000) {
if (!_pRingReader && !_pPublisherSrc) {
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WarnL << "非法链接:" << get_peer_ip();
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shutdown();
}
}
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if (_pPublisherSrc) {
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//publisher
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if (_ticker.elapsedTime() > 15 * 1000) {
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WarnL << "数据接收超时:" << get_peer_ip();
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shutdown();
}
}
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if(_delayTask){
if(time(NULL) > _iTaskTimeLine){
_delayTask();
_delayTask = nullptr;
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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());
} catch (exception &e) {
WarnL << e.what();
shutdown();
}
}
void RtmpSession::onCmd_connect(AMFDecoder &dec) {
auto params = dec.load<AMFValue>();
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double amfVer = 0;
AMFValue objectEncoding = params["objectEncoding"];
if(objectEncoding){
amfVer = objectEncoding.as_number();
}
///////////set chunk size////////////////
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sendChunkSize(60000);
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////////////window Acknowledgement size/////
sendAcknowledgementSize(5000000);
///////////set peerBandwidth////////////////
sendPeerBandwidth(5000000);
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_mediaInfo._app = params["app"].as_string();
_strTcUrl = params["tcUrl"].as_string();
if(_strTcUrl.empty()){
//defaultVhost:默认vhost
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_strTcUrl = string(RTMP_SCHEMA) + "://" + DEFAULT_VHOST + "/" + _mediaInfo._app;
}
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bool ok = true; //(app == APP_NAME);
AMFValue version(AMF_OBJECT);
version.set("fmsVer", "FMS/3,0,1,123");
version.set("capabilities", 31.0);
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AMFValue status(AMF_OBJECT);
status.set("level", ok ? "status" : "error");
status.set("code", ok ? "NetConnection.Connect.Success" : "NetConnection.Connect.InvalidApp");
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);
if (!ok) {
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throw std::runtime_error("Unsupported application: " + _mediaInfo._app);
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}
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AMFEncoder invoke;
invoke << "onBWDone" << 0.0 << nullptr;
sendResponse(MSG_CMD, invoke.data());
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}
void RtmpSession::onCmd_createStream(AMFDecoder &dec) {
sendReply("_result", nullptr, double(STREAM_MEDIA));
}
void RtmpSession::onCmd_publish(AMFDecoder &dec) {
std::shared_ptr<Ticker> pTicker(new Ticker);
std::shared_ptr<onceToken> pToken(new onceToken(nullptr,[pTicker](){
DebugL << "publish 回复时间:" << pTicker->elapsedTime() << "ms";
}));
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dec.load<AMFValue>();/* NULL */
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_mediaInfo.parse(_strTcUrl + "/" + dec.load<std::string>());
auto onRes = [this,pToken](const string &err){
auto src = dynamic_pointer_cast<RtmpMediaSource>(MediaSource::find(RTMP_SCHEMA,
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_mediaInfo._vhost,
_mediaInfo._app,
_mediaInfo._streamid,
false));
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bool authSuccess = err.empty();
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bool ok = (!src && !_pPublisherSrc && authSuccess);
AMFValue status(AMF_OBJECT);
status.set("level", ok ? "status" : "error");
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()));
status.set("clientid", "0");
sendReply("onStatus", nullptr, status);
if (!ok) {
WarnL << "onPublish:"
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<< (authSuccess ? "Already publishing:" : err.data()) << " "
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<< _mediaInfo._vhost << " "
<< _mediaInfo._app << " "
<< _mediaInfo._streamid << endl;
shutdown();
return;
}
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_pPublisherSrc.reset(new RtmpToRtspMediaSource(_mediaInfo._vhost,_mediaInfo._app,_mediaInfo._streamid));
_pPublisherSrc->setListener(dynamic_pointer_cast<MediaSourceEvent>(shared_from_this()));
};
weak_ptr<RtmpSession> weakSelf = dynamic_pointer_cast<RtmpSession>(shared_from_this());
Broadcast::AuthInvoker invoker = [weakSelf,onRes,pToken](const string &err){
auto strongSelf = weakSelf.lock();
if(!strongSelf){
return;
}
strongSelf->async([weakSelf,onRes,err,pToken](){
auto strongSelf = weakSelf.lock();
if(!strongSelf){
return;
}
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onRes(err);
});
};
auto flag = NoticeCenter::Instance().emitEvent(Broadcast::kBroadcastMediaPublish,
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_mediaInfo,
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invoker,
*this);
if(!flag){
//该事件无人监听,默认鉴权成功
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onRes("");
}
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}
void RtmpSession::onCmd_deleteStream(AMFDecoder &dec) {
AMFValue status(AMF_OBJECT);
status.set("level", "status");
status.set("code", "NetStream.Unpublish.Success");
status.set("description", "Stop publishing.");
sendReply("onStatus", nullptr, status);
throw std::runtime_error(StrPrinter << "Stop publishing." << endl);
}
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void RtmpSession::findStream(const function<void(const RtmpMediaSource::Ptr &src)> &cb,bool retry) {
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auto src = dynamic_pointer_cast<RtmpMediaSource>(MediaSource::find(RTMP_SCHEMA,
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_mediaInfo._vhost,
_mediaInfo._app,
_mediaInfo._streamid,
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true));
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if(src || !retry){
cb(src);
return;
}
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//广播未找到流
NoticeCenter::Instance().emitEvent(Broadcast::kBroadcastNotFoundStream,_mediaInfo,*this);
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weak_ptr<RtmpSession> weakSelf = dynamic_pointer_cast<RtmpSession>(shared_from_this());
auto task_id = this;
auto media_info = _mediaInfo;
auto onRegist = [task_id, weakSelf, media_info, cb](BroadcastMediaChangedArgs) {
if(bRegist &&
schema == media_info._schema &&
vhost == media_info._vhost &&
app == media_info._app &&
stream == media_info._streamid){
//播发器请求的rtmp流终于注册上了
auto strongSelf = weakSelf.lock();
if(!strongSelf) {
return;
}
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//切换到自己的线程再回复
//如果触发 kBroadcastMediaChanged 事件的线程与本RtmpSession绑定的线程相同,
//那么strongSelf->async操作可能是同步操作,
//通过指定参数may_sync为false确保 NoticeCenter::delListener操作延后执行,
//以便防止遍历事件监听对象map时做删除操作
strongSelf->async([task_id,weakSelf,media_info,cb](){
auto strongSelf = weakSelf.lock();
if(!strongSelf) {
return;
}
DebugL << "收到rtmp注册事件,回复播放器:" << media_info._schema << "/" << media_info._vhost << "/" << media_info._app << "/" << media_info._streamid;
//再找一遍媒体源,一般能找到
strongSelf->findStream(cb,false);
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//取消延时任务,防止多次回复
strongSelf->cancelDelyaTask();
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//取消事件监听
//在事件触发时不能在当前线程移除事件监听,否则会导致遍历map时做删除操作导致程序崩溃
NoticeCenter::Instance().delListener(task_id,Broadcast::kBroadcastMediaChanged);
}, false);
}
};
NoticeCenter::Instance().addListener(task_id, Broadcast::kBroadcastMediaChanged, onRegist);
//5秒后执行失败回调
doDelay(5, [cb,task_id]() {
//取消监听该事件,该延时任务可以在本对象析构时或到达指定延时后调用
//所以该对象在销毁前一定会被取消事件监听
NoticeCenter::Instance().delListener(task_id,Broadcast::kBroadcastMediaChanged);
cb(nullptr);
});
}
void RtmpSession::sendPlayResponse(const string &err,const RtmpMediaSource::Ptr &src){
bool authSuccess = err.empty();
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bool ok = (src.operator bool() && authSuccess);
if (ok) {
//stream begin
sendUserControl(CONTROL_STREAM_BEGIN, STREAM_MEDIA);
}
// onStatus(NetStream.Play.Reset)
AMFValue status(AMF_OBJECT);
status.set("level", ok ? "status" : "error");
status.set("code", ok ? "NetStream.Play.Reset" : (authSuccess ? "NetStream.Play.StreamNotFound" : "NetStream.Play.BadAuth"));
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");
sendReply("onStatus", nullptr, status);
if (!ok) {
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WarnL << (authSuccess ? "No such stream:" : err.data()) << " "
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<< _mediaInfo._vhost << " "
<< _mediaInfo._app << " "
<< _mediaInfo._streamid
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<< endl;
shutdown();
return;
}
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// onStatus(NetStream.Play.Start)
status.clear();
status.set("level", "status");
status.set("code", "NetStream.Play.Start");
status.set("description", "Started playing.");
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status.set("details", _mediaInfo._streamid);
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status.set("clientid", "0");
sendReply("onStatus", nullptr, status);
// |RtmpSampleAccess(true, true)
AMFEncoder invoke;
invoke << "|RtmpSampleAccess" << true << true;
sendResponse(MSG_DATA, invoke.data());
//onStatus(NetStream.Data.Start)
invoke.clear();
AMFValue obj(AMF_OBJECT);
obj.set("code", "NetStream.Data.Start");
invoke << "onStatus" << obj;
sendResponse(MSG_DATA, invoke.data());
//onStatus(NetStream.Play.PublishNotify)
status.clear();
status.set("level", "status");
status.set("code", "NetStream.Play.PublishNotify");
status.set("description", "Now published.");
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status.set("details", _mediaInfo._streamid);
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status.set("clientid", "0");
sendReply("onStatus", nullptr, status);
// onMetaData
invoke.clear();
invoke << "onMetaData" << src->getMetaData();
sendResponse(MSG_DATA, invoke.data());
src->getConfigFrame([&](const RtmpPacket::Ptr &pkt) {
//DebugL<<"send initial frame";
onSendMedia(pkt);
});
_pRingReader = src->getRing()->attach(getPoller());
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weak_ptr<RtmpSession> weakSelf = dynamic_pointer_cast<RtmpSession>(shared_from_this());
SockUtil::setNoDelay(_sock->rawFD(), false);
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_pRingReader->setReadCB([weakSelf](const RtmpPacket::Ptr &pkt) {
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auto strongSelf = weakSelf.lock();
if (!strongSelf) {
return;
}
strongSelf->onSendMedia(pkt);
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});
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_pRingReader->setDetachCB([weakSelf]() {
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auto strongSelf = weakSelf.lock();
if (!strongSelf) {
return;
}
strongSelf->shutdown();
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});
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_pPlayerSrc = src;
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if (src->getRing()->readerCount() == 1) {
src->seekTo(0);
}
//提高发送性能
(*this) << SocketFlags(kSockFlags);
SockUtil::setNoDelay(_sock->rawFD(),false);
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}
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void RtmpSession::doPlayResponse(const string &err,const std::function<void(bool)> &cb){
if(!err.empty()){
//鉴权失败,直接返回播放失败
sendPlayResponse(err, nullptr);
cb(false);
return;
}
weak_ptr<RtmpSession> weakSelf = dynamic_pointer_cast<RtmpSession>(shared_from_this());
//鉴权成功,查找媒体源并回复
findStream([weakSelf,cb](const RtmpMediaSource::Ptr &src){
auto strongSelf = weakSelf.lock();
if(strongSelf){
strongSelf->sendPlayResponse("", src);
}
cb(src.operator bool());
});
}
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void RtmpSession::doPlay(AMFDecoder &dec){
std::shared_ptr<Ticker> pTicker(new Ticker);
std::shared_ptr<onceToken> pToken(new onceToken(nullptr,[pTicker](){
DebugL << "play 回复时间:" << pTicker->elapsedTime() << "ms";
}));
weak_ptr<RtmpSession> weakSelf = dynamic_pointer_cast<RtmpSession>(shared_from_this());
Broadcast::AuthInvoker invoker = [weakSelf,pToken](const string &err){
auto strongSelf = weakSelf.lock();
if(!strongSelf){
return;
}
strongSelf->async([weakSelf,err,pToken](){
auto strongSelf = weakSelf.lock();
if(!strongSelf){
return;
}
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strongSelf->doPlayResponse(err,[pToken](bool){});
});
};
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auto flag = NoticeCenter::Instance().emitEvent(Broadcast::kBroadcastMediaPlayed,_mediaInfo,invoker,*this);
if(!flag){
//该事件无人监听,默认不鉴权
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doPlayResponse("",[pToken](bool){});
}
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}
void RtmpSession::onCmd_play2(AMFDecoder &dec) {
doPlay(dec);
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}
void RtmpSession::onCmd_play(AMFDecoder &dec) {
dec.load<AMFValue>();/* NULL */
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_mediaInfo.parse(_strTcUrl + "/" + dec.load<std::string>());
doPlay(dec);
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}
void RtmpSession::onCmd_pause(AMFDecoder &dec) {
dec.load<AMFValue>();/* NULL */
bool paused = dec.load<bool>();
TraceL << paused;
AMFValue status(AMF_OBJECT);
status.set("level", "status");
status.set("code", paused ? "NetStream.Pause.Notify" : "NetStream.Unpause.Notify");
status.set("description", paused ? "Paused stream." : "Unpaused stream.");
sendReply("onStatus", nullptr, status);
//streamBegin
sendUserControl(paused ? CONTROL_STREAM_EOF : CONTROL_STREAM_BEGIN,
STREAM_MEDIA);
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if (!_pRingReader) {
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throw std::runtime_error("Rtmp not started yet!");
}
if (paused) {
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_pRingReader->setReadCB(nullptr);
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} else {
weak_ptr<RtmpSession> weakSelf = dynamic_pointer_cast<RtmpSession>(shared_from_this());
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_pRingReader->setReadCB([weakSelf](const RtmpPacket::Ptr &pkt) {
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auto strongSelf = weakSelf.lock();
if(!strongSelf) {
return;
}
strongSelf->onSendMedia(pkt);
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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");
}
std::string type = dec.load<std::string>();
if (type != "onMetaData") {
throw std::runtime_error("can only set metadata");
}
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_pPublisherSrc->onGetMetaData(dec.load<AMFValue>());
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}
void RtmpSession::onProcessCmd(AMFDecoder &dec) {
typedef void (RtmpSession::*rtmpCMDHandle)(AMFDecoder &dec);
static unordered_map<string, rtmpCMDHandle> g_mapCmd;
static onceToken token([]() {
g_mapCmd.emplace("connect",&RtmpSession::onCmd_connect);
g_mapCmd.emplace("createStream",&RtmpSession::onCmd_createStream);
g_mapCmd.emplace("publish",&RtmpSession::onCmd_publish);
g_mapCmd.emplace("deleteStream",&RtmpSession::onCmd_deleteStream);
g_mapCmd.emplace("play",&RtmpSession::onCmd_play);
g_mapCmd.emplace("play2",&RtmpSession::onCmd_play2);
g_mapCmd.emplace("seek",&RtmpSession::onCmd_seek);
g_mapCmd.emplace("pause",&RtmpSession::onCmd_pause);}, []() {});
std::string method = dec.load<std::string>();
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auto it = g_mapCmd.find(method);
if (it == g_mapCmd.end()) {
TraceL << "can not support cmd:" << method;
return;
}
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_dNowReqID = dec.load<double>();
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auto fun = it->second;
(this->*fun)(dec);
}
void RtmpSession::onRtmpChunk(RtmpPacket &chunkData) {
switch (chunkData.typeId) {
case MSG_CMD:
case MSG_CMD3: {
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AMFDecoder dec(chunkData.strBuf, chunkData.typeId == MSG_CMD3 ? 1 : 0);
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onProcessCmd(dec);
}
break;
case MSG_DATA:
case MSG_DATA3: {
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AMFDecoder dec(chunkData.strBuf, chunkData.typeId == MSG_CMD3 ? 1 : 0);
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std::string type = dec.load<std::string>();
TraceL << "notify:" << type;
if (type == "@setDataFrame") {
setMetaData(dec);
}
}
break;
case MSG_AUDIO:
case MSG_VIDEO: {
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if (!_pPublisherSrc) {
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throw std::runtime_error("Not a rtmp publisher!");
}
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GET_CONFIG_AND_REGISTER(bool,rtmp_modify_stamp,Rtmp::kModifyStamp);
if(rtmp_modify_stamp){
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chunkData.timeStamp = _stampTicker[chunkData.typeId % 2].elapsedTime();
}
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_pPublisherSrc->onWrite(std::make_shared<RtmpPacket>(std::move(chunkData)));
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}
break;
default:
WarnL << "unhandled message:" << (int) chunkData.typeId << hexdump(chunkData.strBuf.data(), chunkData.strBuf.size());
break;
}
}
void RtmpSession::onCmd_seek(AMFDecoder &dec) {
dec.load<AMFValue>();/* NULL */
auto milliSeconds = dec.load<AMFValue>().as_number();
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InfoL << "rtmp seekTo(ms):" << milliSeconds;
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auto stongSrc = _pPlayerSrc.lock();
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if (stongSrc) {
stongSrc->seekTo(milliSeconds);
}
AMFValue status(AMF_OBJECT);
AMFEncoder invoke;
status.set("level", "status");
status.set("code", "NetStream.Seek.Notify");
status.set("description", "Seeking.");
sendReply("onStatus", nullptr, status);
}
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void RtmpSession::onSendMedia(const RtmpPacket::Ptr &pkt) {
auto modifiedStamp = pkt->timeStamp;
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auto &firstStamp = _aui32FirstStamp[pkt->typeId % 2];
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if(!firstStamp){
firstStamp = modifiedStamp;
}
if(modifiedStamp >= firstStamp){
//计算时间戳增量
modifiedStamp -= firstStamp;
}else{
//发生回环,重新计算时间戳增量
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CLEAR_ARR(_aui32FirstStamp);
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modifiedStamp = 0;
}
sendRtmp(pkt->typeId, pkt->streamId, pkt, modifiedStamp, pkt->chunkId);
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}
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void RtmpSession::doDelay(int delaySec, const std::function<void()> &fun) {
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if(_delayTask){
_delayTask();
}
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_delayTask = fun;
_iTaskTimeLine = time(NULL) + delaySec;
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}
void RtmpSession::cancelDelyaTask(){
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_delayTask = nullptr;
}
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} /* namespace mediakit */