mixing | 易学教程

Calling Objective-C parent from C++ object

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问题 Creating Audio Unit Extensions on iOS requires mixing of C++ and Objective-C classes. As a result I now have an Objective-C object with a C++ object as one of its variables. I would like the C++ child object to be able to notify its Objective-C parent/owner of certain state changes. In pseudo-code: void cppChildObject::callMom() { objectiveCParent::notificationMethod(); } Is this possible in an elegant way? 回答1: It depends on how you define elegant... This is possible in a fairly elegant way

Scala : get mixin interfaces at runtime

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问题 I need to get all the interfaces at runtime from a given Class (all loaded in a ClassLoader). For instance, if a class has been declared this way : trait B trait C trait D class A extends B with C with D I want to get this information at runtime : A depends on B and C and D . The java getInterfaces() (or the interfaces() from the clapper library) methods gives only the first dependency, namely: A depends on B . Is there a way to achieve that ? I guess by reflection but I don't know how ? 回答1:

Can you mix the JVM languages? ie: Groovy & Clojure

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问题 I understand that you can easily mix groovy&java, clojure&java, whateverJvmLang&java. Does this also mean I can have clojure and groovy code interact as well? If I use Grails or jRoR, can I also make use of clojure in that environment? 回答1: As long as the languages in question actually produce Java classes (that is: classes that are known to the Java platform, not necessarily written in the Java language), then yes: they can easily interact with each other. At least for Groovy I know that it

Compass compile error on Sencha Touch 2.2.1, undefined $font-family value and mixin problems

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问题 Using this tutorial with Sencha Touch 2.2.1, I'm not able to compile my project because of an undefined $font-family variable: error application.scss (Line 2 of _Class.scss: Undefined variable: "$font-family".) Sass::SyntaxError on line ["2"] of /Users/mac/Sites/apps/MyApp/touch/resources/themes/stylesheets/sencha- touch/default/src/_Class.scss: Undefined variable: "$font-family". Does anyone have an idea how to solve this? Note: This was a bug in the previous version (Sencha Touch 2.2).

Mixing streams concept in kurento media server

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Can anybody explain what is the basic concept in mixing in Kurento media server? As it is mentioned in what kurento provides, there is a term mixing. So, I would like to know what kurento Media server mixes. As, Do it mix multi stream generated by a user into one stream and broadcast that stream to other receiving user? If it does this how to use this concept Do kurento able to receive multi-streams through one PeerConnection object with user, i.e., at one WebRtcEndPoint Kurento can receive or send multi stream by mixing those streams into one stream? Edit Regarding Answer Update So, I can use

How to mix Mp3 files

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问题 I would like to mix MP3 files with Delphi 2010. Is this possible? Does anyone know of a component (set) I could use to get this done? Or maybe a runtime library? Any tips from someone with experience mixing MP3 files? 回答1: I use newAc: http://symmetrica.net/newac/ it has a soundmixer component and supports mp3 inputs. Cheers! 回答2: FFmpeg has pascal headers, which apparently you can use from delphi: http://www.iversenit.dk/dev/ffmpeg-headers/ This should allow you to load mp3s or any other

How to mix sound files of different format using FFMPEG?

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I need to mix audio files of different types into a single output file through code in my iPad app. For example, I need to merge a .m4a file with .mp3 or .wav or any other format file. The resulting output file should be of .m4a type. I have compiled FFMPEG for iOS with the link: http://lists.mplayerhq.hu/pipermail/ffmpeg-devel/2009-October/076618.html Now, I am not able to understand in which direction to proceed? This is more of a suggestion than an answer. I don't have any experience with obj-c, though I have worked with audio formats in other languages. Unless you find some library that

Mix multiple sounds in flash

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I have several sound objects in flash, I would like to mix different points in these sound files to create a single masterpiece and save it as an mp3. I've seen various "mixer" applications online and would like to know what area(s) to look at to be able to do this myself. To create the music or whatever you're trying to create, you'll have to Import your wav and mp3 files into your library and drag them onto the movie area to add them to your timeline. Use multiple layers to help organize them. To test your song out you can hit Enter to run from whatever frame your on forward to the end. Don

how to convert C# to C++ [closed]

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问题 Closed . This question needs to be more focused. It is not currently accepting answers. Want to improve this question? Update the question so it focuses on one problem only by editing this post. Closed 11 months ago . Could someone please help me to convert C# to C++? here is an example: using System; using System.Net; using System.Text; using System.IO; using System.Threading; namespace read_website { class Program { static void Main(string[] args) { while (true) { DownloadString("http://www

Best way to access Java classes from C++? (better than using JNI directly)

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I have to integrate a large Java library in a quite large C++ application. A solution is to use JNI but this requires to hand code all the classes. Python has, for example, a wonderful solution with JPype ( http://jpype.sourceforge.net/ ) that automatizes the process (although the same solution cannot be applied to C++ due to C++ and Python different natures). Thanks, Das SWIG is a tool that lets you auto-generate bindings from one language to another. It supports C++ and Java and a dozen other languages. Seems that my question was not clear enough. Maybe the confusion comes from JNI that