bnc multiplexer

Channel Multiplexing Technology Multiplexing is the basic concept of communication technology, as shown in the following illustration, if a multiplexer is used at the transmitter, it can be combined to communicate using a shared channel. At the receiving end of the use of the distributor, the combined transmission of information sent to the corresponding end point. When communicating, the multiplexer is alw

responsibility is to handle all channel registrations on the selector of this thread multiplexer Set the Nioserversocketchannel. Netty creating Nioserversocketchannel objects with reflection through the factory class Setting TCP Parameters Create and initialize the Channelpipeline when the link is established. It is essentially a chain of responsibilities that handles network events and is responsible for managing and executing Channelhandler.

), close (close), the file event corresponding to the operation is generated, and the file event handler invokes the associated event handler before the socket to handle these events. CompositionThe four components of the file event handler, which are sockets, I/O multiplexers, file event dispatcher (dispatcher), and event handlers, respectively.Four components of a file event handlerA file event is an abstraction of a socket operation that produces a file event whenever a socket is ready t

The design pattern of the object behavior class, sorting and distributing synchronization events. Alias Dispatcher(dispenser) The reactor pattern is a common pattern for handling concurrent I/O, and is used for synchronous I/O, with the central idea of registering all I/O events to be processed on a central I/O multiplexer while the main thread blocks on the multiplexer; once i/ o The event arrives or is re

The Iolinux kernel will treat all external devices as a single file, and read and write to a file invokes the kernel system command, putting back a filename descriptor ( File descriptor), the read-write to a socket will also have a corresponding descriptor, called socketfd java NiO core class library Multiplexer selector is based on Epoll multiplexing technology implementation NBSP;I/O multiplexing technology enables multiple client requests to be

Java.nio.channels.socketchannel;import Java.sql.Date;import Java.util.iterator;import Java.util.set;public class Multiplexertimeserver implements Runnable {private Selector Selec Tor Private Serversocketchannel Servchannel; Private volatile Boolean stop; /** * Initializing multiplexer, binding listening port */public multiplexertimeserver (int port) {try {//create multiplexer Selector

for NIO is that when a connection is created, it does not need to correspond to a thread, this connection will be registered on the multiplexer, so all the connections need only one thread can be done, when the multiplexer in this thread polling, found the connection on the request to open a thread to handle, That is, a request for a threading pattern. In the process of NIO, when a request comes in, open t

method, will read to the content write to the buffer to save. Cases:Bytebuffer buffer = bytebuffer.allocate (n); Buffer.clear (); // resets the position to 0, sets the limit to capacity, and makes the buffer writable FileChannel New FileInputStream ("filename"//read from file channel writes to buffer3. Non-blocking IOThe Java.nio.channels package contains channel-related classes, which represent an I/O channel to a hardware device, file, network socket, and so on, and the channel is a bidi

I have had a Mercedes diagnostic machineMB STAR C3For a while and I decided to try and make it work, but every time I try to communicate with the car I get a error MESSAG E saying:Fault (1.1) -1.501.9504Initialization of diagnosis Multiplexer failed. Possible causes:the link between the diagnosis multiplexer and the diagnostic socket is interrupted. The link between the diagnosis

(image stretch, pixel format conversion)The Swscale class Library can convert the format of pixel data while stretching the size of the image.Example of use of Libswscale: The simplest example of FFmpeg-based Libswscale (YUV to RGB)In addition, this example comes with a program to generate a test picture: The simplest example attachment for FFmpeg-based libswscale: Test picture Generation toolProcessing of the 8.FFMPEG package format is done using FFmpeg for encapsulation format, mainly through

, poll, and Epoll are essentially synchronous I/O, first block a waiting socket, and block to copy data from the kernel to the user's memory.The differences between select, poll, and Epoll, such as the following table:1.10. Two I/O multiplexing modes: Reactor and ProactorIn both modes the event multiplexer feedback to the program information is not the same:The 1.Reactor mode shows that you can read and write (send and receive) operations.The 2.Proact

ChannelsWe read and write to the data through the channel, it is like a water pipe, is a channel. The channel differs from the flow where the channel is bidirectional and can be used for read, write, and simultaneous reading and writing operations.The channels of the underlying operating system are generally full-duplex, so full-duplex channel streams can better map the underlying operating system's APIs.There are two major types of channel: Selectablechannel: User network read/write

type, and its structure is this: struct Eventop { const char *name; void * (*init) (struct event_base *); Initializes Int (*add) (void *, struct event *); Register Event Int (*del) (void *, struct event *); Delete event int (*dispatch) (struct event_base *, void *, struct timeval *); Event distribution void (*dealloc) (struct event_base *, void *); Log off, Release resources /* Set if we need to reinitialize the event base /int need_reinit; Setting whether to reinitia

the difference between 1.BIO, NiO and AIO. BIO: A connection to a thread, the client has a connection request, the server side needs to start a thread to process. The thread overhead is large. Pseudo-Asynchronous IO: Put the request connection into the thread pool, one-to-many, but the thread is still a valuable resource. NIO: One thread is requested, but the connection requests sent by the client are registered to the multiplexer, and

This article describes how to test a network service program with internal logic by using test harness. The code for this article is shown in Http://code.google.com/p/muduo/source/browse/trunk/examples/multiplexer Download Address: http://muduo.googlecode.com/files/muduo-0.2.0-alpha.tar.gz SHA1 checksum: 75a09a82f96b583004876e95105c679e64c95715 Cloud Wind in his blog mentioned the game to connect the server's functional requirements (search "practi

exchange speed, reduce costs and improve reliability. In an ideal all-optical network, all functions of signal exchange, route selection, transmission and recovery are all in the form of light. At present, all optical network is not the whole network optical, but refers to the optical information flow in the transmission and exchange process in the form of light, with the circuit method to achieve the control part. From the current situation and development trend of optical electronic componen

In the fully transparent networking scheme using IP network or leased line to realize voice switch, in addition to adopting the most advanced signaling system, the built-in voice compression platform and its IP network voice are integrated in the switching system. VOIP Technology and Gateway technology are the key to achieve high quality voice communication. The built-in speech compression technology provides a new set of solutions for the connections between nodes, and can reduce the communic

-based package format processing: AV Splitter (demuxer)AV multiplexer (muxer): The simplest ffmpeg-based package format processing: AV multiplexer (muxer)9.FFmpeg Streaming Media applicationsThe use of ffmpeg for streaming media applications, mainly the transmission and reception of streaming media.Articles directly using the Ffmpeg.exe command line tool:ffmpeg command to send streaming media (udp,rtp,rtmp)

information from the hard diskFor example, through the read command , called an IO operation , an io is completed , an io is not completed , blocking keyboard io, disk io is complete ,This process is also unable to respond, because the keyboard IO is not finished , still blocking , the process is still asleep , this time what to do ?This requires I/O multiplexing.Execution processAfter the process in the call io , not directly call io function , in the system kernel , a new system call , The

stretching the size of the image.Example of use of Libswscale: The simplest example of FFmpeg-based Libswscale (YUV to RGB)In addition, this example comes with a program to generate a test picture: The simplest example attachment for FFmpeg-based libswscale: Test picture Generation toolProcessing of the 8.FFMPEG package format is done using FFmpeg for encapsulation format, mainly through Avformat. There are 3 examples of processing of encapsulation formats:Encapsulated Format Converter: The sim