JackCpp

Hi, I made some c++ classes which wrap the Jack audio io api and lock-free ring buffer. Works with Linux and OSX (thanks to Will Wolcott for OSX testing and example/test file comments).

License

This code is licensed with version 3 of the GPL license and is intended for use with in open source projects.

How to get it

I have created a github project where you can find the source code. There you can use git to download the code or use github's handy 'download' link.

Documentation

View the doxygen generated documentation here: doc

Example

Below is a simple c++ example program that uses this api. A more in depth example is included in the download.

#include "jackaudioio.hpp"
#define MIN(x,y) ((x) < (y) ? (x) : (y))

class TestJack: public JackCpp::AudioIO {
  public:
    // Your audio callback. All audio processing goes in this function.
    virtual int audioCallback(jack_nframes_t nframes, 
        audioBufVector inBufs,
        audioBufVector outBufs){
      for(unsigned int i = 0; i < MIN(inBufs.size(),outBufs.size()); i++){
        // A simple example: copy the input to the output.
        for(unsigned int j = 0; j < nframes; j++)
          outBufs[i][j] = inBufs[i][j];
      }
      //0 on success
      return 0;
    }
    TestJack() :
      JackCpp::AudioIO("jackcpp-test", 2,2){
    }
};

int main(){
  // initial ports from constructor created here.
  TestJack * t = new TestJack;
  t->start();  // activate the client

  //connect our ports to physical ports
  t->connectToPhysical(0,0);    // connects this client out port 0 to physical destination port 0
  t->connectToPhysical(1,1);    // connects this client out port 1 to physical destination port 1
  t->connectFromPhysical(0,0);  // connects this client in port 0 to physical source port 0
  t->connectFromPhysical(1,1);  // connects this client in port 1 to physical source port 1

  sleep(20);    // sleep to allow the callback to run for 20 seconds.
  t->close();  // stop client.
  delete t;  // always clean up after yourself.
  exit(0);
}