android - Dividing in frames a .wav file having a 50% of overlapping in java -


i have read interesting post calculate fft audio file , have downloaded audio.analysis library suggested in 1 of last comment having trouble in doing this:

  1. dividing in frames .wav file
  2. having 50 % overlapping of frames

actually have customized class "read example" taken from: http://www.labbookpages.co.uk/audio/javawavfiles.html#methods , had customized follow in order float[] containing frames getted .wav file: 

   package com.example.audioanalysis;    import java.io.file;    import java.net.url;    import java.util.arraylist;     import android.os.environment;     import com.example.genderrecognitionapp.mainactivity;      public class readexample     {          public static float[] bufferfromwavfile()          {             final string path = "example";             final string file_name = "audiorecorder.wav";             arraylist<integer> framesread = new arraylist<integer>();      try     {         url defaultaudio = mainactivity.class.getresource(environment.getexternalstoragedirectory() + "/" + path + "/" + file_name);         final decoder decoder = null;         file soundfile = new file(defaultaudio.touri());          // open wav file specified first argument         wavfile wavfile = wavfile.openwavfile(soundfile);          // number of audio channels in wav file         int numchannels = wavfile.getnumchannels();          // create buffer of 100 frames         double[] buffer = new double[100 * numchannels];                  {             // read frames buffer             framesread.add(wavfile.readframes(buffer, 100));         }         while (framesread != null);          // close wavfile         wavfile.close();     }     catch (exception e)     {         system.err.println(e);     }      float[] arrayofframes = new float[framesread.size()];      for(int = 0; i<framesread.size(); i++)     {         arrayofframes[i] = framesread.get(i);     }     return arrayofframes; } }

my problems resolved class spectrum provider belonging audio.analysis constructor of spectrum provider require decoder object object not in input frames. how wiring 2 part?

could me? thank in advantage.


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