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• Something like System.Diagnostics.Process.Start to run a stream

  - by phenevo

  Hi, I get from server images and videos by stream. Now I'm saving it: Stream str = client.GetFile(path); using (var outStream = new FileStream(@"c:\myFile.jpg", FileMode.Create)) { var buffer = new byte[4096]; int count; while…

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• ignore certain buffers using iswitchb

  - by robUK

  Hello, GNU Emacs 23.1 I am using iswitchb. However, when I press c-x b I get a list of buffers. However, I don't want to display one like scratch, Messages, GNU Emacs, etc. Just the buffers I have opened myself. So I am looking for a way to ignore these buffers. This is what I have in my configuration. However, it doesn't ignore the…

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• copying a short int to a char array

  - by cateof

  I have a short integer variable called s_int that holds value = 2 unsighed short s_int = 2; I want to copy this number to a char array to the first and second position of a char array. Let's say we have char buffer[10];. We want the two bytes of s_int to be copied at buffer[0] and buffer[1]. How can I do it?

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• Faster way to clone.

  - by AngryHacker

  I am trying to optimize a piece of code that clones an object: #region ICloneable public object Clone() { MemoryStream buffer = new MemoryStream(); BinaryFormatter formatter = new BinaryFormatter(); formatter.Serialize(buffer, this); // takes 3.2 seconds buffer.Position = 0; return…

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• PIX_FMT_YUYV422 8 bits conversion ffmpeg

  - by Sridhar

  Hi, I have a raw YUYV422 buffer with 8-bit 4:2:2 Component Y’CbCr format (Y0, Cb, Y1, Cr order). I know that ffmpeg's PIX_FMT_YUYV422 only handle 16-bit buffers.So I am getting Bad memory error when scaling that buffer into YUV420P. Can any one give me a clue, how can I use this buffer with ffmpeg to…

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• Thread locking issue with FileHelpers between calling engine.ReadNext() method and readign engine.Li

  - by Rad

  I use producer/consumer pattern with FileHelpers library to import data from one file (which can be huge) using multiple threads. Each thread is supposed to import a chunk of that file and I would like to use LineNumber property of the FileHelperAsyncEngine instance that is reading the file as primary…

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• Is it possible to BitBlt directly on to a GDI+ bitmap?

  - by jnm2

  I am trying to BitBlt from an HBITMAP to a GDI+ bitmap. I tried this, but nothing happens: Bitmap Buffer = New Bitmap(608, 392) Graphics BufferGraphics = Graphics.FromImage(Buffer); IntPtr hBufferDC = BufferGraphics.GetHdc(); ... BitBlt(hBufferDC, x, y, width, height, hInputDC, 0, 0, SRCCOPY); …

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• How can two threads access a common array of buffers with minimal blocking ? (c#)

  - by Jelly Amma

  Hello, I'm working on an image processing application where I have two threads on top of my main thread: 1 - CameraThread that captures images from the webcam and writes them into a buffer 2 - ImageProcessingThread that takes the latest image from that buffer for filtering. The reason why this…

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• boost.asio error on read from socket.

  - by niXman

  The following code of the client: typedef boost::array<char, 10> header_packet; header_packet header; boost::system::error_code error; ... /** send header */ boost::asio::write( _socket, boost::asio::buffer(header, header.size()), boost::asio::transfer_all(), …

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• zlib gzgets extremely slow?

  - by monkeyking

  I'm doing stuff related to parsing huge globs of textfiles, and was testing what input method to use. There is not much of a difference using c++ std::ifstreams vs c FILE, According to the documentation of zlib, it supports uncompressed files, and will read the file without decompression. I'm…

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• Can I avoid a threaded UDP socket in Python dropping data?

  - by 666craig

  First off, I'm new to Python and learning on the job, so be gentle! I'm trying to write a threaded Python app for Windows that reads data from a UDP socket (thread-1), writes it to file (thread-2), and displays the live data (thread-3) to a widget (gtk.Image using a gtk.gdk.pixbuf). I'm using…

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• Efficient file buffering & scanning methods for large files in python

  - by eblume

  The description of the problem I am having is a bit complicated, and I will err on the side of providing more complete information. For the impatient, here is the briefest way I can summarize it: What is the fastest (least execution time) way to split a text file in to ALL…

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• Why isn't my log4net appender buffering?

  - by Eric

  I've created a custom log4net appender. It descends from log4net.Appender.SmtpAppender which descends from log4net.Appender.BufferingAppenderSkeleton. I programatically setup the following parameters in its constructor: this.Lossy = false; //don't drop any messages…

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• How do you send a named pipe string from umnanaged to managed code space?

  - by billmcf

  I appear to have a named pipes 101 issue. I have a very simple set up to connect a simplex named pipe transmitting from a C++ unmanaged app to a C# managed app. The pipe connects, but I cannot send a "message" through the pipe unless I close the handle which appears…

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• Is the C++ compiler optimizer allowed to break my destructor ability to be called multiple times?

  - by sharptooth

  We once had an interview with a very experienced C++ developer who couldn't answer the following question: is it necessary to call the base class destructor from the derived class destructor in C++? Obviously the answer is no, C++ will call the base class…

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• get content from website with utf8 format

  - by zahir

  i want how to get the content from websites with utf8 format,, i have writing the following code is try { String webnames = "http://pathivu.com"; URL url = new URL(webnames); URLConnection urlc = url.openConnection(); …

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• What happens when we say "listen to a port" ?

  - by smwikipedia

  Hi, When we start a server application, we always need to speicify the port number it listens to. But how is this "listening mechanism" implemented under the hood? My current imagination is like this: The operating system associate the port number…

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• Preallocating memory with C++ in realtime environment

  - by Elazar Leibovich

  I'm having a function which gets an input buffer of n bytes, and needs an auxillary buffer of n bytes in order to process the given input buffer. (I know vector is allocating memory at runtime, let's say that I'm using a vector which uses static…

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• reading and writing QByteArrays

  - by synchronicity

  I'm having trouble reading and writing QByteArray data to a file. My goal is to save QPixmap data into a QByteArray and save that QByteArray to a file (with the ability to read this QByteArray back from the file and into a QPixmap). I want to…

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• wxPython - How can I display a html formatted string in wx.RichTextCtrl

  - by wxpydon

  Hello, I'm trying to display some string (html formatted) in a Richtext Ctrl. In my code I tried to use it this way (self.txtmain is the RichTextCtrl): out = StringIO() htmlhandler = rt.RichTextHTMLHandler() buffer = self.txtmain.GetBuffer()…

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• Performance Cost of a Memcopy in C/C++

  - by Cenoc

  So whenever I write code I always think about the performance implications. I've often wondered, what is the "cost" of using a memcopy relative to other functions in terms of performance? For example, I may be writing a sequence of numbers…

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• char[] and char* compatibility?

  - by Aerovistae

  In essence, will this code work? And before you say "Run it and see!", I just realized my cygwin didn't come with gcc and it's currently 40 minutes away from completing reinstallation. That being said: char* words[1000]; for(int i = 0;…

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• public class ImageHandler : IHttpHandler

  - by Ken

  cmd.Parameters.AddWithValue("@id", new system.Guid (imageid)); What using System reference would this require? Here is the handler: using System; using System.Collections.Specialized; using System.Web; using…

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• Make function declarations based on function definitions

  - by Clinton Blackmore

  I've written a .cpp file with a number of functions in it, and now need to declare them in the header file. It occurred to me that I could grep the file for the class name, and get the declarations that way, and…

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• Creating android app Database with big amount of data

  - by Thomas

  Hi all, The database of my application need to be filled with a lot of data, so during onCreate(), it's not only some create table sql instructions, there is a lot of inserts. The solution I chose is to store…

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