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Building a simple mp3 music player
I want to create simplest mp3 player in C or C++.
What function or API do I have to use ?
If you just want to write a C or C++ program which plays an mp3 file, you might want to look here: How to play MP3 files in C?.
If you are looking to write something more complex (say a full GUI application to select and play mp3s, including elements to play/pause, jump to a part of the song (and see what part is playing), and view song metadata, etc) than the best advice I can give you is to jump right into your program and start coding. The number of things that would need to be covered to give you an adequate response to a general question are very vast, and we don't know anything about what you are trying to do, what your experience is, or what you might have problems with.
If you jump into it and then ask questions if you get stuck on a part of it, it will overall be a lot more helpful for everyone.
Let me introduce you FMod. It is free for non-commercial use and supports tons of music and sound formats, not only mp3. You should take a look after it for sure! It is so great as simple for use i think.
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I'm learning C++ for half a year now (so programming in general) and this site always had the answers I was looking for. But now I came to the point where I need to ask as I couldn't find anything related to my question.
So I want to write a program that takes a screenshot of a particular area of the screen. This screenshot will ONLY contain playcards (so for example Hearth, Seven). What it should do now is return me which card it is, so the symbol and the number/letter.
I already made some researches and the most mentioned thing was the library "OpenCV".
So my question now: First is it even possible with my experience to write something like that?
If so, is this library the way to go? It seems really strong, maybe too strong for just the recognition of numbers/letters and four symbols? So could there be something easier?
And the last question, how could I get a screenshot of a particular area of the screen and not the whole screen and save it somewhere?
I hope you guys have a clue what I really want to know and it was understandable.
Greetings
Definitely use OpenCV. It is not too hard to get into, and once you do you will find it does basically everything you'd want. It makes image processing relatively straightforward and it can solve your problem in a lot of ways.
Here is a good place to start.
I was looking at MeVisLab and I wondered if anyone knows a good framework for making a user interface similar to the one they use. I like the designing flow with boxes and arrows thing.
What I would really like is to able to integrate with C++ using Qt, and perhaps export the graph to xml of something like that.
There is another example of the interface here:
I hope someone knows something
Qt's Graphics View is a "framework" which does a good bit of the handling for the kind of scenario you describe. It doesn't take much code to get off the ground and within striking range of what you're looking for:
http://doc.qt.nokia.com/latest/graphicsview-diagramscene.html
http://doc.qt.nokia.com/latest/graphicsview-elasticnodes.html
I'm not aware of any open-source Qt-based programs that offer exactly what you want already written. Just noticed IBM did open source "DataExplorer", which is interesting to me...I might go take a look at that myself:
http://www.research.ibm.com/dx/
I'm a design student currently dabbling with Arduino code (based on c/c++) and flash AS3. What I want to do is to be able to write a program with a voice control input.
So, program prompts user to spell a word. The user spells out the word. The program recognizes if this is right, adds one to a score if it's correct, and corrects the user if it's wrong. So I'm seeing a big list of words, each with an audio file of the word being read out, with the voice recognition part checking to see if the reply matches the input.
Ideally i'd like to be able to interface this with an Arduino microcontroller so that a physical output with a motor could be achieved in reaction also.
Thing is i'm not sure if I can make this program in flash, in Processing (associated with arduino) or if I need another C program-making-program. I guess I need to download a good voice recognizing program, but how can I interface this with anything else? Also, I'm on a mac. (not sure if this makes a difference)
I apologize for my cluelessness, any hints would be great!
-Susan
What you need is most likely not a speech recognition program. You are looking for a speech recognition library. You're probably not that familiar with programming yet, so the term may be unfamiliar. Basically, a library is an intermediate step between source code and a whole program.
In your case, you are really asking for a library that (1) does vocie recognition and (2) works with Adobe Flash. Unfortunately, I can't find one of them with Google. Furthermore, I've found people who've tried, and their experiments (while short of what you need) are described by others as impressive. That suggests the technology isn't there yet.
It is probably easier to move the voice recognition to the Arduino. "Voice recognition Arduino" provides a lot of good hits in Google.
This is my first time asking here but I've been a reader for ages! A fantastic place to learn!
I was asked to design a simple board game as a programming project this semester (using C++) and to implement GUI for a bonus mark. I was rather lost reading through tens of possible GUI toolkits and not knowing which one to use. I'm rather a beginner and this is my first big project!
My requirements for GUI are very very basic. All I want is to allow the user to pick from between two options at the start of the game. Those options determine which character the user will pick in the game to play with. This is the only input I want from the user. The console program would receive this input, interpret it and do all the logic of the game in the console window.
Currently, the console window displays a numbered list of options for the user who then picks a number and based off that character input, the console knows what to do through some if-statements.
Up till now, I've been told that GTK+ is a good option and I've been advised to check out wxWidgets and QT4. I'm confused on which one to use since I want something fast to learn and simple to implement because the purpose I want it for is also simple. I was also rather reluctant to start learning a GUI toolkit from its basics then realizing it might not have my simple requirement.
Thank you in advance fellas and sorry for the rather long post!
If you want something pretty basic as far as a GUI goes, it might be worth looking into some sample applications from any of the named projects. See what you can find in a sample application that is most similar to what you have, and try to get that working. Then once you have it working, and tweaked to your liking, maybe play around with things a bit more then for a further/better understanding.
My previous experience is with WxWidgets and Qt. My advice would be to check out Qt because of the great documentation for the project as well as the QAssistant.
Good Luck, GUIs can be really fun to incrementally learn!
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I'm an Electronics and Telecommunications student, next to my graduation. I'm gonna work on a project that involves my knowledge about DSP, music and audio in general. I allready know all the basic mathematic instruments and all the stuff I need to manage it, such as FFT, circular convolution ecc ecc.
I want to learn C++ programming basically for one reason: it's very important in the professional world!!! And I think it's one of the most used to write applications working with audio, especially when it's about real time processing.
Ok, after this small introduction I would like to know first, which are the most used libraries to work with audio processing in c++?? I was longer looking on the web but i couldn't find a lo of working stuff. (I work under linux with eclipse CDT enviroment).
Then I would like to know if there are good sources to learn how to write some working code, such as for example how to write a simple low pass filter. Basically now i will not write real time applications, I would like to start from the processing of a WAV file, or even better an MP3 file, so basically on vectors of samples.
Let's say that basically for now I would like to extract the waveform from an audio file, and save it to a thumbnail or to a PNG image.
Ok, for now I think it's all I would need.
Any ideas, advices, libraries, books, interesting sources about that?
Thanks a lot in advance for any kind of answer.
Giovanni.
I would suggest for you to write your own WAVE file reader and writer in C++, without relying on external libraries. The WAVE format is fairly straight forward, at least if you only intend on supporting the most common wave files.
Then you'll have access to the audio data, which you can easily manipulate in C++. I would recommend starting by modifying the volume, the number of channels to calculating statistics on the audio. Creating a PNG of the audio waveform requires some more advanced C++ skills...
Checkout this link which will give you some information on the available (commercial and open source) audio editing softwares.
Some interesting open source audio editing tools which are written in c++,
Audacity
LMMS
Qtractor
Ardour
Rosegarden
C++ library for audio processing.
SndObj
The Synthesis ToolKit in C++
C++ Code and links related Filters and audio processing..
C++ code for Filter,Audio Processing
Code Guru,Low pass filter
I've used BASS with good results (there's a C/C++ API you can use).