Recently, we are studying crtmpserver. Here we record the learning process. First, we will analyze the basic process.
1. Initialization Process
Initnetworking --- initialize the network
Initialize
Logger: Init () --- initialize log
Lowercase (Extension) = "Lua" --- load the. Lua suffix configuration file
Loadluafile
Normalize
Normalizelogappenders initialize log Configuration
Normalizeapplications initialize Listener Configuration
GRS. pconfigfile-> configlogappenders () is initialized Based on the configuration
Iohandlermanager: Initialize () initializes Io and clears read/write queues.
GRS. pconfigfile-> configmodules () load the dynamic library worker elector. dll
Protocolfactorymanager: registerprotocolfactory (GRs. pprotocolfactory) load the set of protocols supported by default
GRS. pconfigfile-> configacceptors () Enable listener Based on IP address and port
GRS. pconfigfile-> configinstances () Multi-instance configuration, not supported in win
GRS. pconfigfile-> configapplications () bind the listener to the instance
Installquitsignal: Set the program exit mechanism
Run
Iohandlermanager: pulse () polls socket resources to check whether there are socket operations that require reading and writing.
2. Connect to receive client connection requests
Pulse ()
Fd_isset (map_val (I)-> getinboundfd (), & _ readfdscopy)
Map_val (I)-> onevent (_ currentevent)
Tcpacceptor: accept () Enter accept to create a connection
Baseprotocol * pProtocol = protocolfactorymanager: createprotocolchain creates the Protocol configured for the connection, such as TCP & rtmp, or UDP & RTCP =
Tcpcarrier * ptcpcarrier = new tcpcarrier (FD) creates a TCP interaction object for the connection and binds it to the created protocol object. When the constructor is created, the Read Request is aborted.
Fd_isset (map_val (I)-> getinboundfd (), & _ readfdscopy)
Map_val (I)-> onevent (_ currentevent)
Tcpcarrier: onevent (select_event & event) enters the read branch to read data, analyzes the data read based on the corresponding protocol, fills the _ outputbuffer sending buffer according to the result, and sets the sending signal tcpcarrier :: signaloutputdata () ---> enable_write_data, notifies the pulse to poll the socket status, and then enters the tcpcarrier: onevent (select_event & event) Write branch again to send real data
Rtmp Message Type: rm_invoke_function_connect
3. Publish
This section is part of rtmp protocol interaction.
Rm_invoke_function_releasestream the stream name is not obtained here, and a name request is sent.
Rm_invoke_function_fcpublish the stream name is obtained here.
Rm_invoke_function_createstream
Processinvokecreatestream
Pfrom-> createneutralstream (ID) = NULL
Rtmpstream * pstream = new rtmpstream create an rtmpstream stream control object rtmpstream ---> basestream
Rm_invoke_function_publish
Processinvokepublish
Getapplication ()-> getallowduplicateinboundnetworkstreams () whether the same name exists here
Innetrtmpstream * pinnetrtmpstream = pfrom-> createins (vh_ci (request) Create Network inbound stream
Getapplication ()-> getstreamsmanager ()-> getwaitingsubscribers query whether a connection to this stream is requested and bind pbaseoutstream-> Link (pinnetrtmpstream );
Pinnetrtmpstream-> sendonstatusstreampublished () sends to prepare to receive stream requests
Baseoutfilestream * poutfilestream = createoutfilestream (pfrom, Meta, appending); in addition, if video recording is required, create a file stream connection here.
4. Receive client requests for real-time streams
This section is part of rtmp protocol interaction.
Rm_invoke_function_play
Processinvokeplay
Pfrom-> closestream (vh_si (request), true) closes the stream requested before the connection
Trylinktolivestream (pfrom, vh_si (request), streamname, linked) binds the connection
For_map (inboundstreams, uint32_t, basestream *, I) finds stream input through streamname Query
Baseoutnetrtmpstream * pbaseoutnetrtmpstream = pfrom-> createons (streamid, first create stream output
Pbaseinnetstream-> Link (pbaseoutnetrtmpstream) then binds the stream output to the stream input.
