Hello, I'm wondering if it's possible to get sound which other apps are playing for example from music or movie player. If it is then how to do this? Edit: I've probably found a solution, but didn't check if it works. VAC - Virtual Audio Cable. It installs virtual sound card in system so we can play all of our sounds into it and then retrive it through Java Sound API with TargetDataLine. It's platform dependent, but it's always an option. There is also StereoMix available in some sound cards and I think it's worth of notice. On linux it's probably possible to achieve it with JACK.

modified on Saturday, March 12, 2011 7:30 PM

Thank you for reply but I have these methods implemented. The problem is that my app can't find any device, though at least one - my laptop - is on and is discoverable. I can easily connect with it through in-built bluetooth app. Yet, another thing that puzzles me is why I can't get bluetooth address and friendly name from LocalDevice object. The only thing I get is empty string or null and my app suspends. Well it seems that the problem is caused by my phone. I rebooted it, launched my app and it worked but only once. Anyway I think that this topic can be considered as closed.

Hello I'm writing bluetooth client application for my mobile phone and I got stuck on device discovery. My app can't discover any device, although in-built bluetooth app works fine. How can I make it work? My code for device discovery:

localDevice = LocalDevice.getLocalDevice();
discoveryAgent = localDevice.getDiscoveryAgent();
discoveryAgent.startInquiry(DiscoveryAgent.GIAC,this);

modified on Sunday, February 27, 2011 1:50 PM

Thanks for that, but I forgot to mantion that I want to write in C++ rather than C. So I would need some c++ API. Heh, I've just realised that ASIO is an API. So, thank you one more time for help.

Hi, I'm going to write small app ( in C++) for creating music, which would work under Win Xp, and I need some means for playing samples and streaming raw audio data. I've looked up for some audio apis but I have no idea which one would be the best to perform this task. I've found some info about core audio APIs and I think that they would be right choose for my app. Unfortunately, as I know, they are just available for Vista and probably Win 7. That's why I would be grateful if you could give me some alternatives for this API (It also can be some cross-platform API). Thanks in advance for help.

modified on Friday, September 18, 2009 3:06 PM

If it's the only way to do this, then I will rather look for some webcamera with it's own API. Anyway thank you for help.

It's not exactly what I meant but anyway thanks.

hmm... I don't have any webcamera yet 'cause I didn't need it so far. I've just been curious about this issue. I know, there are several ways to retrive data from webcamera by using some already existing libraries and APIs. So it doesn't metter what the type of camera it is. I'am new to c++ and just want to know if it's possible to access the driver or USB port which operates on that camera and retrive data from it but without using any api's and external libraries. I don't know if my idea is worth of effort, that's why ask about it. Maybe my previous question wasn't too strict, so sorry for that.

Hi, I was wondering, if it's possible to gain access to date from webcamera, connected to my PC through the USB, by using pure C++ (I mean without using WINAPI and stuff like this). I want to write an application that retrives data of images from webcamera and then works on it. If it were possible, I would be greateful if you could give me some links to sites or titles of books which broach that issue. Thank you in advance.

Thanks, this application does almost exactly that what I wanted my app for, but anyway I want to write my own program. If I make it, I will have a satisfaction, useful program which looks and behave as I want to, and I will learn something new. That is why I didn't look for already written apps. So, I will keep trying. One more time thank you for help, I'm sure that spy++ will be helpful (if I get it somehow) and in case of failure I can use the application you pointed to.

hmm.. the program, I have made, sets a global hook (so I used DLL) which "probably" catch all messages, before any other application receive them, and when the message has a WM_USER parameter then on the screen is displayed a Message Box. If I don't press "OK" button, the message won't be passed to it's destination app. I'm new to the C++ and WinApi, so this is how I think it works due to things that have happend when I've launched it and pressed some button on remote control. And it looks to my that, when I press other buttons, than TV and FM, messages aren't generated by OS, drivers or some other programes connected with my TV card. And the program, I'am hooking into is WinFast Wizard. Probably there is some other application that receives all signals from my remote control, but if so, then I don't know how it's called like. And about Spy++ (I've had no idea that something like this exists, so thank you for advice).... I'am using DevC++, and as I know from the msdn site the spy++ is a part of Visual C++. I've got somewhere 2008 Express Edition but is Spy++ in there too?. I didn't see any information about it, that's why I ask.

modified on Friday, January 23, 2009 4:24 PM

Hi, I would like to write an application which would let me use remote control from my TV card to turn on some apps like music player. The receiver of signals from my rc is connected to TV card. There is also an application which receives the messages when I press some button on remote control. The problem is that, I can't catch all messages using the WH_GETMESSAGE hook and WM_USER parameter for MSG structure. I mean, when I press buttons which are responsible for turning on TV and radio, my application receives a message, but if I press another button like "1" or "Mute", nothing happens. I also have tried using WM_COMMAND and it works, but only if the TV is turned on. And here is my question: Is this possible to catch somehow messages connected with another buttons when my TV is turned off? Thanks in advance and sorry for my english.

modified on Friday, January 23, 2009 2:43 PM