C++ :: WaveinOpen - How To Choose Audio Channel
Feb 12, 2015I'm using waveinOpen to capture sound from my microphone. I know how to set how many channels to use, but how do you tell it what channel to use - left or right?
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C++ :: How To Change Ordinary Picture With Only Red Channel
Aug 29, 2013With using SDL_Maprgb and SDL_GetRgb. I am new to programming.
void put_pixel32 (SDL_Surface *surf, int x, int y, Uint32 pixel){
Uint32 *pixels = (Uint32 *)surf->pixels;
pixels[(y * surf->w ) + x] = pixel;
}
how do i get use of this code?
Uint32 SDL_MapRGB(SDL_PixelFormat* format, Uint8 r, Uint8 g,Uint8 b);
void SDL_GetRGB(Uint32 pixel, const SDL_PixelFormat* format, Uint8*r, Uint8 *g,Uint8 *b)
I am using the existing picture. The function is just like Photoshop, can change the color only in red channel.
C++ :: OPENGL How To Load A Texture With Alpha Channel
Jun 27, 2014I'm trying to load a Quad with a Monster Image on it that will always face the Camera, a la Doom 2.
Now I don't know how to load an image with an Alpha part on it.
In 2D using SDL I always used tga files.
Here is my LoadTexture functions.
AUX_RGBImageRec *LoadBMP(char *Filename) // Loads A Bitmap Image
{
FILE *File=NULL; // File Handle
[Code].....
C# :: WCF Duplex Service Callback Channel Hanging
Jul 1, 2014I have an application based around a WCF Duplex service. I have problems when the user "Restarts" the work the application does... under the hood, the client side closes the connection to the WCF service and creates another. The Service contract is defined like so...
[ServiceContract(Namespace="net.tcp://namespace.MyService",
SessionMode=SessionMode.Required,
CallbackContract=typeof(IServiceCallback))]
public interface IMyService {
[OperationContract(IsOneWay=true)]
[Code] ....
The issue I see is that the _context.Close() call always times out and throws an exception. Although I'm then aborting the channel, this feels wrong to me, and I believe it's the cause of freezing in my application. Why the Close() call fails?
I missed something earlier regarding my callback implementation that might be relevant. It looks something like this:
[Callbackbehavior(ConcurrencyMode = ConcurrencyMode.Single,
UseSynchronizationContext = false,
IncludeExceptionDetailInFaults = true)]
public class CallbackImplementation : IServiceCallback {
public void SendMessage(string message){
// Do something with the message
} }
The exception message is "The ServiceHost close operation timed out after 00:00:30. This could be because a client failed to close a sessionful channel within the required time. The time allotted to this operation may have been a portion of a longer timeout.". There's no inner exception.
The big problem is that the client application freezes when the main application process is started after one client has been disposed and a new one created. I've also noticed that when you close the WPF application, it doesn't close properly and keeps running in the background, preveting you from starting a new instance.
C++ :: Which Std Container To Choose
Sep 16, 2012I have a pile of data, which i need to access frequently and fast. One entry consists of two unsigned ints, let`s call them source and destination.
One source can have several destinations, but this rarely ever happens. Several sources can have the same destination - this happens more frequently, but still scarcely.
Once the data is set up, it rarely ever changes - yet it should be possible to add or remove entries.
I now need to find all sources for a given destination, or all destinations for a given source.
The question: which stl container to choose?
I have tried a multimap, using the source as key. This works good for finding all d for a given s, but is inefficient in the other direction.
Do you think it would be more efficient to have two multimaps, sorted respectively by source and destination?
C++ :: Choose A Number To Check If Prime Or Not
Oct 20, 2014#include "stdafx.h"
#include "iostream"
using namespace std;
int main (){
int x;
int i;
int e;
[Code] ....
is the logic good ? and why the program is looping
C++ :: Choose Second Argument Passed To Nth Element
Jun 18, 2013Here is the code,
Code:
vector<int> vec;
for(int i=0;i<10;++i)
vec.push_back(i);
random_shuffle(vec.begin(), vec.end());
nth_element(vec.begin(), vec.begin()+7, vec.end());
No matter how I choose the second argument passed to nth_element, the elements in vec are always sorted as,
0,1,2,3,4,5,6,7,8,9
What is the use of second argument here?
C# :: Make User Choose A Specific Path?
May 24, 2014I am working on a program in C# that should make a user choose a specific path for the program to work.
The path they are choosing is a path for a game and from that selected path I use coding to load pictures from to the program.
Anyhow
I am able to make the user choose a path and save the selected path in a xml file.
But the user can select ANY path.
How could I do to make the user choose a specific path that I want them to choose?
C/C++ :: How To Choose Which Picture To Load Using CImg Library
Jul 25, 2014I've just started using the CImg library and when I try to load a picture with this code:
CImg<unsigned char> image("example.bmp");
It works perfectly. But when I try to type in the image file name using the console it gives me errors. For example, if I try this:
std::string input_file;
std::cin >> input_file;
CImg<unsigned char> image(input_file);
It doesn't work. The way I see it, I should be able type "example.bmp" into input_file and use it but it doesn't work, and gives me the error:
"error: no matching function for call to 'cimg_library::CImg<unsigned char>::CImg(std::string&)"
I have included iostream and string.h.
C :: Program That Displays Menu Of Commands For User To Choose From
Aug 1, 2013I've read that we can write a program that displays a menu of commands for the user to choose from.We can write some functions that implement these commands, then store pointers to the functions in the array :
Code:
void ( *file_cmd[])(void) = { new_cmd , open_cmd }; // 2 cmd's for simplicity
We can get a similar effect with a switch statement but using an array of function pointers gives us more flexibility since the elements of the array can be changed as the programm is running.
I decided to write an example about this in order to understand better the context, I am facing some problems though :
Code:
#include<stdio.h>
#include<stdlib.h>
typedef void (*p_foo) (int);
void foo(int x);
void foo2(int y);
[Code] .....
The problems are :
Code:
TEST2.c:9: warning: initialization from incompatible pointer type
TEST2.c:9: warning: initialization from incompatible pointer type
TEST2.c:25: error: too few arguments to function "*(arr + (long unsigned int)((long unsigned int)i * 8ul))"
C/C++ :: Selectively Choose Only Numbers Greater Than 1000 In Array?
Aug 4, 2013I am doing my assignment that will calculate total tax amount per day and per week and finally sum those up.
One of the requirement is to filter out any number in the array that is less than 1000 to be assigned a value of zero instead of the stored value so as not to add it in the calculation. How to fulfill this requirement.
C :: Dynamic Memory Allocation - User To Choose Size Of Array
Dec 2, 2013Dynamic memory allocation in array in c programming. I am trying to make the user to choose the size of array they want to engage in the game.
However, i have remove the global variable which contribute the error to my code previously. Now I assigned all the arr individually but not using the global variable. However, i still not get the desired board i want. i still keep getting 9x9 array board.
And i also need limit the board size only from 4 to 9. And how do i do that.
Code:
#include <stdio.h>
#include <stdlib.h>
#include <time.h>
#include <conio.h>
#include <malloc.h>
#include <ctype.h>
#include <stdbool.h>
[Code] .....
C++ :: Creating A Loop To Allow User To Choose To Return To Beginning Of Program Or Quit
Apr 6, 2014I am currently having problems creating a loop that will allow my user to choose to return to the beginning of the program or quit.
#include <iostream>
using namespace std;
int main() {
int j;
do {float a;
cout << "+----Welcome to Basic Operations----+
| Select Your Operation |
[Code] .....
I have not yet finished designing the interface for a couple of the operations, but right now i am hung up on trying to return to the beginning. I believe it is because the j was defined inside do and isn't carried out of the do statement for while.
C/C++ :: Immediate Audio Playback From Mic?
Sep 25, 2012I want to develop a soft like Microphone,Other words for that I speak some words for mic, play from earphone immediately!
.h file
#define InBlocks 4 //input buffer numbers
#define OutBlocks 4 //output buffer numbers
#define INP_BUFFER_SIZE 160
pWaveHdr1=reinterpret_cast<PWAVEHDR>(malloc(sizeof(WAVEHDR)));
pWaveHdr2=reinterpret_cast<PWAVEHDR>(malloc(sizeof(WAVEHDR)));
[code].....
C++ :: Audio Input / Output?
Feb 5, 2015So I have a project in which I am processing audio signals in real-time. I want to create a class to do this using the ASIO driver. I don't want to use a cross platform library nor do I want to use windows API as it is very slow.
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Jan 5, 2013i have a audio file that i want to play via C+.
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Mar 10, 2014I'd like to be able to output sound over skype as if it were coming from my headset, how would I go about this?
View 1 Replies View RelatedC# :: Audio Visualization For RGB STRIP
Apr 7, 2015I have a RGB STRIP connected to Arduino, when im communicating via Serial. All works great! So next i wanted to make some audio visualisation.. So i found some samples etc.. and then i created the Audio Visualisation via C# using BASS.NET, when R has been BASSes, G medium frequency and B high frequency. But isnt looking good, so i started thinking, what 3 variables in song has can use, but this is bad idea.. I got idea to change to random color when its get "beat" or BASS hit some value. I tryied 4 hours of doing it, searching, programming... But i cant do it...
So, my question is how to detect the beat or just anything event for Audio Visualisation. Best output form WASAPI. Only what i can do is get FFT and Audio Spectrum from WASAPI by BASS.NET, but thats all. My audio skills is so low for this.
C/C++ :: Audio Playing With Irrklang?
Apr 4, 2014I tried playing audio using irrKlang in openGL.But i ended up with some problems.
I have attach my source file and also my output file here.
C :: Creating Custom Audio Function
Apr 2, 2013I'm trying to make a windows-focused , I will make it portable after , audio function that plays sounds according to my midi file. I know there is playsound, but it's not what I desire. I'm curious if Beep plays through the sound card or is similar to printf("a") ? I'm just looking for a low level solution.
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Sep 6, 2013how to open an audio file using c. write a code to open an audio file.
View 2 Replies View RelatedC++ :: Giving Audio Input To A Program
Sep 27, 2013I want to give audio-input to a FFT code (KissFFT) written in C, on a real-time basis. While I can give a simple test signal (like sine wave) by writing the sine function as input, I am not sure how I should convert an audio-signal (e.g.: song) into a form that can be taken as input by the KissFFT C code.
View 3 Replies View RelatedC++ :: How To Start Coding Audio Synthesizers
Mar 20, 2013I'm interested in learning how to write the software for audio synthesizers. a friend of mine started on the hardware side for them and, as i have no experience with this type of code.
View 7 Replies View RelatedC++ :: Radio Station - Streaming Audio On The Web
Jan 22, 2013work for a radio station as their webmaster, and we have been looking into online streaming options for the last few months for our website. Pretty much everyone charges a monthly fee for this type of service and I feel like it is something I am capable of doing myself.
At the station we have a computer dedicated to operating the music/talk. On this computer there is a program that ques all the music, ads, ect.. This would be my audio source: Either the program playing all the music, or the computer itself.
The problem I have been pondering all night is how would I access this input source? The only audio input I am familiar with accessing is .mp3 or .wav files. How can I code my program to access this audio the program is producing and stream it to people on the web?
C++ :: Pulse Output Through The Audio Jack?
Dec 12, 2014know of a code snippet that will send a pulse to either the left or right channel of the audio jack and stop the pulse when desired?
Platform is windows 7 or 8.
C/C++ :: Convert Video To Audio File?
Jan 23, 2014I making a application which convert video to audio in MFC. i want make it without using FFMPEG . How can it possible.
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