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• Dealing with video (DVDs, .avi .mkv) in Java

  - by berry120

  After looking around for a decent library for playing videos in Java, I've come unstuck. Everyone around is screaming not to use JMF because it's outdated, old and requires the user to install it, other alternatives such as VLCJ seem good if they work but are still relatively unstable and rely on hefty amounts of native code, and as for dealing with DVDs, I haven't found a single option available! Weighing up my options at the moment, it seems like realistically it's either JMF (despite its disadvantages) or waiting until JavaFX 2.0 comes out and then using that. VLCJ just seems too unstable which isn't really something I can live with. Are there any sensible options other than the ones I've listed above, and what would you go for? I'm not against native code per-se, but it has to be reliable and work on Windows, Mac and Linux.

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• Trimming strings in Go

  - by user1263980

  I'm trying to read an entire line from the console (including whitespace), then process it. Using bufio.ReadString, the newline character is read together with the input, so I came up with the following code to trim the newline character: input,_:=src.ReadString('\n') inputFmt:=input[0:len(input)-2]+"" Is there a more idiomatic way to do this? That is, is there already a library that takes care of the ending null byte when extracting substrings for you? (Yes, I know there is already a way to read a line without the newline character in go readline -> string but I'm looking more for elegant string manipulation.)

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• PHP GD issues with ImageCreateTrueColor and PNGs

  - by DrPheltRight

  I am resizing PNG images using the GD image library function ImageCopyResampled(). It all works fine, I can even keep alpha blending transparency with the use of ImageCreateTrueColor() rather than using ImageCreate() to create the resized image. The problem is, that if I use ImageCreateTrueColor() rather than ImageCreate() the file size of PNG files increases from something like 80kb to 150kb. If I use ImageCreate() the file size stays around the same size, but colors screw! So my question is, how can I retain alpha blending when resizing PNG images without increasing the file size? Oh and I am reducing the dimensions of the PNGs.

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• Is it possible to achieve string localization inside of a statically linked lib?

  - by user3696003

  I am working on building an SDK which will be built out as a statically linked library that third party applications can then drop in to their applications. Inside of this SDK, I was looking to be able to perform some "localization." Basically, I would like for the code in my SDK to be able to access some ".string" files to perform some string lookup and language translation capabilities. Then I could propagate these strings outward to implementing App layers through my exposed API's. Is this even possible? I thought it was but now that I have actually been trying, I am seriously having doubts.

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• python challenge, but for C++

  - by davidthepsycho

  Does anyone know any site or book that presents problems like python challenge, but for C++? When I think python challenge, I do not mean only a set of problems to be solved with C++ (for that I could probably use the same problems of python challenge), but rather problems that will probably be best solved using C++ STL, special features of the language, etc. For example, there is one python challenge that is specifically designed to teach you how to use pickle, a serializing library for python. Until now, I only know programming contests problems, but they could also be solved with C, java or other languages.

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• Oracle Hibernate with in Netbean RCP

  - by jurnaltejo

  All, i have a problem with hibernate using netbean platform 6.8, i have been search around internet, but cannot found the suitable answer This is my story. i am using oracle database as data source of my hibernate entity with ojdbc14.jar driver. First i create hibernate entity tobe wrapped latter in a netbeans module, i tested the hibernate connection configuration and everything just works well. i can connect to oracle database successfuly, every hibernate query works well. Then i wrapped that hibernate entity jar as a netbeans module, create another module to warp my ojdbc14.jar then i test it. and, im using hibernate library dependency that available on netbean platform (netbean 6.8), but unfutornatelly i got oracle sql error saying “no suitable driver for [connection url]” when running the project. thats quite weird since it doesn’t happend when I test it before with out netbean platform. i thought that is related to netbeans lazy loading issue, i am not sure,. any idea ? tq for help

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• Building a jar to be used in an eclipse PDE?

  - by tul

  I have written an application that use a third party library. I have then packaged this as an executable jar using the maven-assembly-plugin (producing a jar with all dependencies including some of the third-party jars). Next I need to add this jar to a PDE project so it can be launched from eclipse. But to make this work I need to add some of the thirs-party dependencies to my PDE project which is already located in the packaged jar. So I get duplicated dependencies. Any ideas on how to avoid this? Or suggestion to documentation that describes how this is done properly?

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• Using Silverlight with Existing Application

  - by Silverlight_noob

  This seems like a very basic question but I couldn't find any help on web. If you could provide some link or steps to do this. I have created few basic Silverlight applications which are working fine standalone. I also have a basic ASP.NET application with a solution with around 10 Class Library Projects and 1 website. I want to create a small popup which will have some funtionality using Silverlight. How should I go about creating this application and how to integrate it with my existing application for it to show as a link. I would not want that link to open another application/site. Thanks.

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• Getting the fractional part of a float without using modf()

  - by knight666

  Hi, I'm developing for a platform without a math library, so I need to build my own tools. My current way of getting the fraction is to convert the float to fixed point (multiply with (float)0xFFFF, cast to int), get only the lower part (mask with 0xFFFF) and convert it back to a float again. However, the imprecision is killing me. I'm using my Frac() and InvFrac() functions to draw an anti-aliased line. Using modf I get a perfectly smooth line. With my own method pixels start jumping around due to precision loss. This is my code: const float fp_amount = (float)(0xFFFF); const float fp_amount_inv = 1.f / fp_amount; inline float Frac(float a_X) { return ((int)(a_X * fp_amount) & 0xFFFF) * fp_amount_inv; } inline float Frac(float a_X) { return (0xFFFF - (int)(a_X * fp_amount) & 0xFFFF) * fp_amount_inv; } Thanks in advance!

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• C++ Inheritance Question

  - by shaz

  I have a base class MessageHandler and 2 derived classes, MessageHandler_CB and MessageHandler_DQ. The derived classes redefine the handleMessage(...) method. MH_DQ processes a message and puts the result in a deque while MH_CB processes the message and then executes a callback function. The base class has a static callback function that I pass along with a this pointer to a library which calls the static callback when a new message is available for processing. My problem comes when I am in the static callback with a void * pointing to either a MH_DQ or a MH_CB. If I cast it to the base class the empty MessageHandler::handleMessage(...) method is called, rather than the version in the appropriate derived class. What is the best way to address this situation from a design perspective and/or what language features might help me to implement a solution to my problem? Thanks in advance!

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• How can I combine multiple iPhone applications in to one application?

  - by Toret

  At the moment I have 2 completed iPhone applications. Both these applications must be contained in to one application. I can't have multiple apps on the app store and to avoid confusion among people using these apps I must have them contained to a single application that gives the user the capability to launch any application in the wrapper. How can I go about doing this. Some of the ideas that crossed my mind are: Building a Framework, or building a library. But Im not even sure if I'm heading in the right direction.

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• Scalable stl set like container for C++

  - by Pqr

  Hi, I need to store large number of integers. There can be duplicates in the input stream of integers, I just need to store distinct amongst them. I was using stl set initially but It went OutOfMem when input number of integers went too high. I am looking for some C++ container library which would allow me to store numbers with the said requirement possibly backed by file i.e container should not try to keep all numbers in-mem. I don't need to store this data persistently, I just need to find unique values amongst it.

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• Mercurial: two separate repos somewhat related (yes I'm getting confused)

  - by Lo'oris

  I have a local repository, let's call it ONE. ONE is the actual program. It's an android program, in case it matters for some reason. I have a remote repository, let's call it EXT. EXT is somewhat a library, used by ONE. ONE has a complex directory structure, mandated by android. The main sources are in src/bla/bla/ONE. Since ONE uses EXT, to do it I had to create another directory next to that one, that is src/bla/bla/EXT. I think would like to keep them separated in two repositories, but I need for them to actually be in this same directory structure to compile ONE. At the moment I just created a symlink to do it, but I wonder if there is a better way of doing that, that uses some hg feature.

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• How to automatically trigger the App Object initialization in Powerpoint ?

  - by asksuperuser

  It is said here: http://msdn.microsoft.com/en-us/library/aa211599%28v=office.11%29.aspx Before the procedure will run, you must connect the declared object in the class module (App in this example) with the Application object. You can do this with the following code from any module. Dim X As New EventClassModule Sub InitializeApp() Set X.App = Application End Sub Run the InitializeApp procedure. Run HOW ? By hand ? I want it to automatically run when opening the powerpoint rather. Is there any way ?

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• Is there any reason I shouldn't do database calls from the destructor?

  - by ryeguy

  I want to create a sort of datamapper library, where you'd do something like this: $users = Users::getTable(); $users->add($newUser1); $users->add($newUser2); Now $users contains 2 user records, but they aren't yet persisted to the database. To be efficient, I'd like to flush them all at once. I would like to have a flush() method to do this (not an issue), but I'd also like for it to happen implicitly when the $users table reference falls out of scope. Is there any reason I shouldn't do this in the destructor?

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• Persistent Logins

  - by Trido

  I am following this article on creating persistent login cookies with my ASP.NET site: http://msdn.microsoft.com/en-us/library/system.web.security.formsauthentication.encrypt.aspx The issue is that when I navigate to the page, I get the following compiler error: Compiler Error Message: CS1061: 'ASP.administration_login_aspx' does not contain a definition for 'Login_Click' and no extension method 'Login_Click' accepting a first argument of type 'ASP.administration_login_aspx' could be found (are you missing a using directive or an assembly reference?) Can anyone tell me why this is. The error message doesn't really say much and I don't believe I am missing a directive or assembly reference. The code builds without any problems. EDIT: I did not include code because I said I was following that link which includes code. I copy/pasted from the example.

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• how to create a plot with customized points in R?

  - by kloop

  I know I can create a plot with line and dots using the type = "o" argument in the plot command. I would like some more control over this -- I want to be able to draw the "o" as full dots, with black border and fill-in color of my choice, of customized size and of a different color than the line. Same for the line, I want to make it thicker, and of my choice of color. How would I go on about doing that? What I found until now is just a plain plot(y, type= "o") which is too poor for my needs. I am not interested in using ggplot, but instead use the internal plot library of R. Any help appreciated.

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• Can Android Applications ( using libraries build from NDK ) be used on both x86 & ARM platform?

  - by Vibgyor

  I am going to build an Android application in which I want to use a C library. So, I am planning to use NDK along with the SDK. NDK supports ARMv5, ARmv7 and x86 instruction set. Now, if I build an Android application using ARMv5 , will it run on Android phones based on Intel ( x86 ) platform (am I missing something ?)? If not, then what is the way by which I can build an ANdroid application ( which uses some C libraries underneath ) that can run on all the Android phones irrespective of the underneath platform? Vibgyor

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• C++ & C#, how to create wrapper dll in C++ for C# to call instance function in C++ dll?

  - by 5YrsLaterDBA

  Received an unmanaged C++ dll with instance functions which need to be called from my C#. need to write a wrapper C++ dll to bridge the C# and original C++ dll as suggested by experts here. it is new to me and want to learn from you. Header file of the original C++ dll likes this: class EXPORT_MACRO NB_DPSM { private: string sFileNameToAnalyze ; public: NB_DPSM(void); ~NB_DPSM(void); void setFileNameToAnalyze(string FileNameToAnalyze) ; int WriteGenbenchData(string& message) ; }; Start from a Class Library project template or CLR Empty Project template? What's the wrapper code should look like? Anywhere has step by step example for this? thanks,

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• headfile conflict let every line becomes "not declared"

  - by altria

  I have a.h a.cpp b.h and a library for b. The thing is, if I choose to include b.h in either a.h or a.cpp, it will let complier return "was not declared in this scope" for every line of a.h. The same program works fine on another computer, although Makefile might be different. I have to admit, I think I may have change some settings, but I forgot which one I changed. Is there anybody have any idea? I am using linux and gcc.

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• Is there any sample Java code that does AES encryption exactly like this website?

  - by user1068636

  http://www.hanewin.net/encrypt/aes/aes-test.htm If you go to this website and enter the following: "Key In Hex": 00000000000000000000000000123456 "Plain Text in Hex": 00000000000000000000000000000000 And click on "Encrypt" button you will see the ciphertext in hex is: 3fa9f2a6e4c2b440fb6f676076a8ba04 Is there a Java program out there that I can do this (I.e. Is there an AES library that will input the "Key In Hex" above with the "Plain Text In Hex" above and generate the Ciphertext in Hex above? )? I would appreciate any advice or links to Java sample code that does this.

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• How expensive is a call to java.util.HashMap.keySet()?

  - by fx42

  I implemented a sparse matrix as List<Map<Integer,Double>>. To get all entries of row i I call list.get(i).keySet(). How expensive is this call? I also used the trove library for an alternative implementation as List<TIntDoubleHashMap>. What's the cost of calling list.get(i).keys(), here? Do you have any further ideas of how to implement an efficient sparse matrix? Or can you provide a list of existing implementations in java?

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• QuickPdf - Memory leak

  - by Lonzo

  I have a method containing code to create a pdf doc using the QuickPdf library. Inside the method, I instantiate a QuickPdf object, create the pdf doc and save it to a file. I then call this method for each file to be generated. Now my problem is that the pdf docs' sizes are increasing with each call to the method even though the contents are basically the same . I am suspecting a memory leak but I cant see where exactly, since the QuickPdf object is being created and disposed each time on each call.

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• Cakephp 1.3 JsHelper for AjaxHelper

  - by erick2red

  Hi: I'm start using cakephp and i made a demo app using AjaxHelper $ajax->link('title', 'url', array('update' => 'mydiv')) Now i want to migrate that to cakephp 1.3 and AjaxHelper is deprecated on cake 1.3 and will be removed, so i want to accomplish the same with JsHelper which is replacing the functionality of AjaxHelper and JavascriptHelper I just can't find how to do that. I want to upgrade the versions to use jQuery out of the box with cakephp 1.3 and get rid of Prototype javascript library. so, any help ? I've already read the migration guide and nothing found yet.

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• How do I use udev to find info about inserted video media (e.g. DVDs)

  - by Daniel

  I'm trying to port an application from using HAL to using pure udev. It is written in python and will use the gudev library, though I would love to see examples in any language. I'm able to get all attached video devices (such as cameras) via: import gudev client = gudev.Client(["video4linux"]) for device in client.get_devices(): print device.get_sysfs_attr("name"), device.get_device_name() This prints out something like: USB2.0 UVC WebCam /dev/video0 I am also able to get a list of block devices, but how can I: Tell if it is a CD/DVD drive? Tell if media is currently inserted if the drive supports removable media? Tell what the name/label of the media is (e.g. FUTURAMAS1 for a DVD)? The original code I am trying to port over is located at http://github.com/danielgtaylor/arista/blob/045a4d48ebfda44bc5d0609618ff795604ee134f/arista/inputs.py Any and all help would be greatly appreciated!

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