/* * Copyright (c) 2016 The ZLMediaKit project authors. All Rights Reserved. * * This file is part of ZLMediaKit(https://github.com/xiongziliang/ZLMediaKit). * * Use of this source code is governed by MIT license that can be found in the * LICENSE file in the root of the source tree. All contributing project authors * may be found in the AUTHORS file in the root of the source tree. */ #include "RtmpSession.h" #include "Common/config.h" #include "Util/onceToken.h" namespace mediakit { RtmpSession::RtmpSession(const Socket::Ptr &sock) : TcpSession(sock) { DebugP(this); GET_CONFIG(uint32_t,keep_alive_sec,Rtmp::kKeepAliveSecond); sock->setSendTimeOutSecond(keep_alive_sec); //起始接收buffer缓存设置为4K,节省内存 sock->setReadBuffer(std::make_shared(4 * 1024)); } RtmpSession::~RtmpSession() { DebugP(this); } void RtmpSession::onError(const SockException& err) { bool isPlayer = !_publisher_src; uint64_t duration = _ticker.createdTime()/1000; WarnP(this) << (isPlayer ? "RTMP播放器(" : "RTMP推流器(") << _media_info._vhost << "/" << _media_info._app << "/" << _media_info._streamid << ")断开:" << err.what() << ",耗时(s):" << duration; //流量统计事件广播 GET_CONFIG(uint32_t,iFlowThreshold,General::kFlowThreshold); if(_total_bytes > iFlowThreshold * 1024){ NoticeCenter::Instance().emitEvent(Broadcast::kBroadcastFlowReport, _media_info, _total_bytes, duration, isPlayer, static_cast(*this)); } } void RtmpSession::onManager() { GET_CONFIG(uint32_t,handshake_sec,Rtmp::kHandshakeSecond); GET_CONFIG(uint32_t,keep_alive_sec,Rtmp::kKeepAliveSecond); if (_ticker.createdTime() > handshake_sec * 1000) { if (!_ring_reader && !_publisher_src) { shutdown(SockException(Err_timeout,"illegal connection")); } } if (_publisher_src) { //publisher if (_ticker.elapsedTime() > keep_alive_sec * 1000) { shutdown(SockException(Err_timeout,"recv data from rtmp pusher timeout")); } } } void RtmpSession::onRecv(const Buffer::Ptr &buf) { _ticker.resetTime(); try { _total_bytes += buf->size(); onParseRtmp(buf->data(), buf->size()); } catch (exception &ex) { shutdown(SockException(Err_shutdown, ex.what())); } } void RtmpSession::onCmd_connect(AMFDecoder &dec) { auto params = dec.load(); double amf_ver = 0; AMFValue objectEncoding = params["objectEncoding"]; if(objectEncoding){ amf_ver = objectEncoding.as_number(); } ///////////set chunk size//////////////// sendChunkSize(60000); ////////////window Acknowledgement size///// sendAcknowledgementSize(5000000); ///////////set peerBandwidth//////////////// sendPeerBandwidth(5000000); _media_info._app = params["app"].as_string(); _tc_url = params["tcUrl"].as_string(); if(_tc_url.empty()){ //defaultVhost:默认vhost _tc_url = string(RTMP_SCHEMA) + "://" + DEFAULT_VHOST + "/" + _media_info._app; } bool ok = true; //(app == APP_NAME); AMFValue version(AMF_OBJECT); version.set("fmsVer", "FMS/3,0,1,123"); version.set("capabilities", 31.0); 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."); status.set("objectEncoding", amf_ver); sendReply(ok ? "_result" : "_error", version, status); if (!ok) { throw std::runtime_error("Unsupported application: " + _media_info._app); } AMFEncoder invoke; invoke << "onBWDone" << 0.0 << nullptr; sendResponse(MSG_CMD, invoke.data()); } void RtmpSession::onCmd_createStream(AMFDecoder &dec) { sendReply("_result", nullptr, double(STREAM_MEDIA)); } void RtmpSession::onCmd_publish(AMFDecoder &dec) { std::shared_ptr ticker(new Ticker); weak_ptr weak_self = dynamic_pointer_cast(shared_from_this()); std::shared_ptr pToken(new onceToken(nullptr,[ticker,weak_self](){ auto strong_self = weak_self.lock(); if(strong_self){ DebugP(strong_self.get()) << "publish 回复时间:" << ticker->elapsedTime() << "ms"; } })); dec.load();/* NULL */ _media_info.parse(_tc_url + "/" + getStreamId(dec.load())); _media_info._schema = RTMP_SCHEMA; auto on_res = [this,pToken](const string &err, bool enableRtxp, bool enableHls, bool enableMP4){ auto src = dynamic_pointer_cast(MediaSource::find(RTMP_SCHEMA, _media_info._vhost, _media_info._app, _media_info._streamid)); bool auth_success = err.empty(); bool ok = (!src && !_publisher_src && auth_success); AMFValue status(AMF_OBJECT); status.set("level", ok ? "status" : "error"); status.set("code", ok ? "NetStream.Publish.Start" : (auth_success ? "NetStream.Publish.BadName" : "NetStream.Publish.BadAuth")); status.set("description", ok ? "Started publishing stream." : (auth_success ? "Already publishing." : err.data())); status.set("clientid", "0"); sendReply("onStatus", nullptr, status); if (!ok) { string errMsg = StrPrinter << (auth_success ? "already publishing:" : err.data()) << " " << _media_info._vhost << " " << _media_info._app << " " << _media_info._streamid; shutdown(SockException(Err_shutdown,errMsg)); return; } _publisher_src.reset(new RtmpMediaSourceImp(_media_info._vhost, _media_info._app, _media_info._streamid)); _publisher_src->setListener(dynamic_pointer_cast(shared_from_this())); //设置转协议 _publisher_src->setProtocolTranslation(enableRtxp, enableHls, enableMP4); //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 _sock->setReadBuffer(std::make_shared(256 * 1024)); setSocketFlags(); }; if(_media_info._app.empty() || _media_info._streamid.empty()){ //不允许莫名其妙的推流url on_res("rtmp推流url非法", false, false, false); return; } Broadcast::PublishAuthInvoker invoker = [weak_self,on_res,pToken](const string &err, bool enableRtxp, bool enableHls, bool enableMP4){ auto strongSelf = weak_self.lock(); if(!strongSelf){ return; } strongSelf->async([weak_self,on_res,err,pToken,enableRtxp,enableHls,enableMP4](){ auto strongSelf = weak_self.lock(); if(!strongSelf){ return; } on_res(err, enableRtxp, enableHls, enableMP4); }); }; auto flag = NoticeCenter::Instance().emitEvent(Broadcast::kBroadcastMediaPublish, _media_info, invoker, static_cast(*this)); if(!flag){ //该事件无人监听,默认鉴权成功 GET_CONFIG(bool,to_rtxp,General::kPublishToRtxp); GET_CONFIG(bool,to_hls,General::kPublishToHls); GET_CONFIG(bool,to_mp4,General::kPublishToMP4); on_res("", to_rtxp, to_hls, to_mp4); } } 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); } void RtmpSession::sendPlayResponse(const string &err,const RtmpMediaSource::Ptr &src){ bool auth_success = err.empty(); bool ok = (src.operator bool() && auth_success); 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" : (auth_success ? "NetStream.Play.StreamNotFound" : "NetStream.Play.BadAuth")); status.set("description", ok ? "Resetting and playing." : (auth_success ? "No such stream." : err.data())); status.set("details", _media_info._streamid); status.set("clientid", "0"); sendReply("onStatus", nullptr, status); if (!ok) { string err_msg = StrPrinter << (auth_success ? "no such stream:" : err.data()) << " " << _media_info._vhost << " " << _media_info._app << " " << _media_info._streamid; shutdown(SockException(Err_shutdown, err_msg)); return; } // onStatus(NetStream.Play.Start) status.clear(); status.set("level", "status"); status.set("code", "NetStream.Play.Start"); status.set("description", "Started playing."); status.set("details", _media_info._streamid); 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."); status.set("details", _media_info._streamid); status.set("clientid", "0"); sendReply("onStatus", nullptr, status); auto &metadata = src->getMetaData(); if(metadata){ //在有metadata的情况下才发送metadata //其实metadata没什么用,有些推流器不产生metadata // onMetaData invoke.clear(); invoke << "onMetaData" << metadata; sendResponse(MSG_DATA, invoke.data()); auto duration = metadata["duration"]; if(duration && duration.as_number() > 0){ //这是点播,使用绝对时间戳 _stamp[0].setPlayBack(); _stamp[1].setPlayBack(); } } src->getConfigFrame([&](const RtmpPacket::Ptr &pkt) { //DebugP(this)<<"send initial frame"; onSendMedia(pkt); }); //音频同步于视频 _stamp[0].syncTo(_stamp[1]); _ring_reader = src->getRing()->attach(getPoller()); weak_ptr weakSelf = dynamic_pointer_cast(shared_from_this()); _ring_reader->setReadCB([weakSelf](const RtmpMediaSource::RingDataType &pkt) { auto strongSelf = weakSelf.lock(); if (!strongSelf) { return; } if(strongSelf->_paused){ return; } int i = 0; int size = pkt->size(); strongSelf->setSendFlushFlag(false); pkt->for_each([&](const RtmpPacket::Ptr &rtmp){ if(++i == size){ strongSelf->setSendFlushFlag(true); } strongSelf->onSendMedia(rtmp); }); }); _ring_reader->setDetachCB([weakSelf]() { auto strongSelf = weakSelf.lock(); if (!strongSelf) { return; } strongSelf->shutdown(SockException(Err_shutdown,"rtmp ring buffer detached")); }); _player_src = src; if (src->totalReaderCount() == 1) { src->seekTo(0); } //提高服务器发送性能 setSocketFlags(); } void RtmpSession::doPlayResponse(const string &err,const std::function &cb){ if(!err.empty()){ //鉴权失败,直接返回播放失败 sendPlayResponse(err, nullptr); cb(false); return; } //鉴权成功,查找媒体源并回复 weak_ptr weak_self = dynamic_pointer_cast(shared_from_this()); MediaSource::findAsync(_media_info, weak_self.lock(), [weak_self,cb](const MediaSource::Ptr &src){ auto rtmp_src = dynamic_pointer_cast(src); auto strong_self = weak_self.lock(); if(strong_self){ strong_self->sendPlayResponse("", rtmp_src); } cb(rtmp_src.operator bool()); }); } void RtmpSession::doPlay(AMFDecoder &dec){ std::shared_ptr ticker(new Ticker); weak_ptr weak_self = dynamic_pointer_cast(shared_from_this()); std::shared_ptr token(new onceToken(nullptr, [ticker,weak_self](){ auto strongSelf = weak_self.lock(); if (strongSelf) { DebugP(strongSelf.get()) << "play 回复时间:" << ticker->elapsedTime() << "ms"; } })); Broadcast::AuthInvoker invoker = [weak_self,token](const string &err){ auto strong_self = weak_self.lock(); if (!strong_self) { return; } strong_self->async([weak_self, err, token]() { auto strong_self = weak_self.lock(); if (!strong_self) { return; } strong_self->doPlayResponse(err, [token](bool) {}); }); }; auto flag = NoticeCenter::Instance().emitEvent(Broadcast::kBroadcastMediaPlayed, _media_info, invoker, static_cast(*this)); if(!flag){ //该事件无人监听,默认不鉴权 doPlayResponse("",[token](bool){}); } } void RtmpSession::onCmd_play2(AMFDecoder &dec) { doPlay(dec); } string RtmpSession::getStreamId(const string &str){ string stream_id; string params; auto pos = str.find('?'); if (pos != string::npos) { //有url参数 stream_id = str.substr(0, pos); //获取url参数 params = str.substr(pos + 1); } else { //没有url参数 stream_id = str; } pos = stream_id.find(":"); if (pos != string::npos) { //vlc和ffplay在播放 rtmp://127.0.0.1/record/0.mp4时, //传过来的url会是rtmp://127.0.0.1/record/mp4:0, //我们在这里还原成0.mp4 //实际使用时发现vlc,mpv等会传过来rtmp://127.0.0.1/record/mp4:0.mp4,这里做个判断 auto ext = stream_id.substr(0, pos); stream_id = stream_id.substr(pos + 1); if (stream_id.find(ext) == string::npos) { stream_id = stream_id + "." + ext; } } if (params.empty()) { //没有url参数 return stream_id; } //有url参数 return stream_id + '?' + params; } void RtmpSession::onCmd_play(AMFDecoder &dec) { dec.load();/* NULL */ _media_info.parse(_tc_url + "/" + getStreamId(dec.load())); _media_info._schema = RTMP_SCHEMA; doPlay(dec); } void RtmpSession::onCmd_pause(AMFDecoder &dec) { dec.load();/* NULL */ bool paused = dec.load(); TraceP(this) << 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); _paused = paused; } void RtmpSession::setMetaData(AMFDecoder &dec) { if (!_publisher_src) { throw std::runtime_error("not a publisher"); } std::string type = dec.load(); if (type != "onMetaData") { throw std::runtime_error("can only set metadata"); } auto metadata = dec.load(); // dumpMetadata(metadata); _publisher_src->setMetaData(metadata); _set_meta_data = true; } void RtmpSession::onProcessCmd(AMFDecoder &dec) { typedef void (RtmpSession::*cmd_function)(AMFDecoder &dec); static unordered_map s_cmd_functions; static onceToken token([]() { s_cmd_functions.emplace("connect", &RtmpSession::onCmd_connect); s_cmd_functions.emplace("createStream", &RtmpSession::onCmd_createStream); s_cmd_functions.emplace("publish", &RtmpSession::onCmd_publish); s_cmd_functions.emplace("deleteStream", &RtmpSession::onCmd_deleteStream); s_cmd_functions.emplace("play", &RtmpSession::onCmd_play); s_cmd_functions.emplace("play2", &RtmpSession::onCmd_play2); s_cmd_functions.emplace("seek", &RtmpSession::onCmd_seek); s_cmd_functions.emplace("pause", &RtmpSession::onCmd_pause); }); std::string method = dec.load(); auto it = s_cmd_functions.find(method); if (it == s_cmd_functions.end()) { // TraceP(this) << "can not support cmd:" << method; return; } _recv_req_id = dec.load(); auto fun = it->second; (this->*fun)(dec); } void RtmpSession::onRtmpChunk(RtmpPacket &chunk_data) { switch (chunk_data.type_id) { case MSG_CMD: case MSG_CMD3: { AMFDecoder dec(chunk_data.buffer, chunk_data.type_id == MSG_CMD3 ? 1 : 0); onProcessCmd(dec); break; } case MSG_DATA: case MSG_DATA3: { AMFDecoder dec(chunk_data.buffer, chunk_data.type_id == MSG_CMD3 ? 1 : 0); std::string type = dec.load(); if (type == "@setDataFrame") { setMetaData(dec); } else { TraceP(this) << "unknown notify:" << type; } break; } case MSG_AUDIO: case MSG_VIDEO: { if (!_publisher_src) { 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[chunk_data.type_id % 2].revise(chunk_data.time_stamp, chunk_data.time_stamp, dts_out, dts_out, true); chunk_data.time_stamp = dts_out; } if (!_set_meta_data && !chunk_data.isCfgFrame()) { _set_meta_data = true; _publisher_src->setMetaData(TitleMeta().getMetadata()); } _publisher_src->onWrite(std::make_shared(std::move(chunk_data))); break; } default: WarnP(this) << "unhandled message:" << (int) chunk_data.type_id << hexdump(chunk_data.buffer.data(), chunk_data.buffer.size()); break; } } void RtmpSession::onCmd_seek(AMFDecoder &dec) { dec.load();/* 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().as_number(); InfoP(this) << "rtmp seekTo(ms):" << milliSeconds; auto strong_src = _player_src.lock(); if (strong_src) { strong_src->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->type_id % 2].revise(pkt->time_stamp, 0, dts_out, dts_out); sendRtmp(pkt->type_id, pkt->stream_index, pkt, dts_out, pkt->chunk_id); } bool RtmpSession::close(MediaSource &sender,bool force) { //此回调在其他线程触发 if(!_publisher_src || (!force && _publisher_src->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 _publisher_src ? _publisher_src->totalReaderCount() : sender.readerCount(); } void RtmpSession::setSocketFlags(){ GET_CONFIG(int, merge_write_ms, General::kMergeWriteMS); if (merge_write_ms > 0) { //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 << _media_info._vhost << " " << _media_info._app << " " << _media_info._streamid << (string) printer; } } /* namespace mediakit */