scribeGriff / ConvoHio

ConvoHio: A server side signal processing library for use with ConvoLab

ConvoHio

A server side signal processing library in Dart

This application is intended to be used on the server with the ConvoLab signal processing library. Contains dart:io dependency to allow the signal processing of files residing on the server if desired. Data can then be either saved to a file in tab deliminated format or sent to the web using websockets.

Example Usage:

To compute the partial sums of fourier series of a soundwave sample whose data is stored on the server, one could do the following:

import 'package:convohio/convohio.dart';
import 'package:convolab/convolab.dart';

void main() {
  List waveform = sound(4);
  List kvals = [1, 40, 80];
  var fourier = fsps(waveform, kvals);
  if (fourier != null) {
    exportToWeb(fourier.jsonData, 'local', 8080);
    exportToFile(fourier.psums, 'local/data/fsps.txt');
    print('We have computed ${fourier.psums.length} Fourier series.');
    if (fourier.psums[kvals[0]].every(f(element) => element is Complex)) {
      print('The computed Fourier series is of type Complex.');
    } else {
      print('The computed Fourier series is not Complex.');
    }
  } else {
    print('There was an error computing the Fourier series');
  }
}

The algorithm fsps() computes the fourier series and is contained in the ConvoLab library. The exportToWeb() and exportToFile() are part of the ConvoHio library.