// test_byte_read.java     test_byte_read  ok.wav
//                         reads bytes one at a time as an int

import java.io.*;

class test_byte_read
{
  test_byte_read(String inp)
  {
    char riff[] = new char[4];
    int  sread, swrite;
    int  fsize;
    char wave[] = new char[4];
    char fmt[] = new char[4];
    int  nbytes;
    short  ccode;
    short  channels;
    int rate;
    int avgrate;
    short blockalign;
    short bps; // bits per sample 
    char data[] = new char[4];
    int csize; 
    int ibyte; // byte of cound
    char more[] = new char[4];
    int smin = 0;
    int smax = 0;
    int savg;
    int bad; // flags bad data in read 
    int nbread; // number of bytes read 
  
    System.out.println("test_read_byte.java running ");
    System.out.println("reading "+inp);

    try
    {
      FileInputStream ds = new FileInputStream(inp);

      sread = 4;
      for(int i=0; i<sread; i++) riff[i] = (char)ds.read();
      System.out.println("read "+sread+" bytes, should be 4");
      System.out.println("first 4 bytes should be RIFF "+
                         riff[0]+riff[1]+riff[2]+riff[3]);

      fsize = 0;
      smax = 1;
      for(int i=0; i<4; i++) { fsize += ds.read()*smax; smax *= 256;}
      System.out.println("file has "+fsize+" +8 bytes");

      for(int i=0; i<4; i++) wave[i] = (char)ds.read();
      System.out.println("4 bytes should be WAVE "+
                         wave[0]+wave[1]+wave[2]+wave[3]);

      for(int i=0; i<4; i++) fmt[i] = (char)ds.read();
      System.out.println("4 bytes should be fmt  "+
                         fmt[0]+fmt[1]+fmt[2]+fmt[3]);

      nbytes = 0;
      smax = 1;
      for(int i=0; i<4; i++) { nbytes += ds.read()*smax; smax *= 256;}
      System.out.println("block has "+nbytes+" bytes");

      ccode = 0;
      smax = 1;
      for(int i=0; i<2; i++) { ccode += ds.read()*smax; smax *= 256;}
      System.out.println("compression code = "+ccode);

      channels = 0;
      smax = 1;
      for(int i=0; i<2; i++) { channels += ds.read()*smax; smax *= 256;}
      System.out.println("channels = "+channels);

      rate = 0;
      smax = 1;
      for(int i=0; i<4; i++) { rate += ds.read()*smax; smax *= 256;}
      System.out.println("rate = "+rate);

      avgrate = 0;
      smax = 1;
      for(int i=0; i<4; i++) { avgrate += ds.read()*smax; smax *= 256;}
      System.out.println("avg rate = "+avgrate);

      blockalign = 0;
      smax = 1;
      for(int i=0; i<2; i++) { blockalign += ds.read()*smax; smax *= 256;}
      System.out.println("blockalign = "+blockalign);

      bps = 0;
      smax = 1;
      for(int i=0; i<2; i++) { bps += ds.read()*smax; smax *= 256;}
      System.out.println("bits per sample = "+bps);

      for(int i=0; i<4; i++) data[i] = (char)ds.read();
      System.out.println("4 bytes should be data "+
                         data[0]+data[1]+data[2]+data[3]);

      csize = 0;
      smax = 1;
      for(int i=0; i<4; i++) { csize += ds.read()*smax; smax *= 256;}
      System.out.println("chunk has "+csize+" bytes");

      nbread = 44;
      System.out.println(nbread+" bytes read so far");
  
      bad = 0;
      savg = 0;
      for(int i=0; i<csize; i++)
      {
	ibyte = ds.read(); // signed byte
        if(ibyte>127) ibyte = ibyte-256;
        savg = savg + ibyte;
        if(i==0) {smin=ibyte; smax=ibyte;}
        smin = ibyte<smin?ibyte:smin;
        smax = ibyte>smax?ibyte:smax;
        if(i<10 || i>csize-10) System.out.println("sound byte ="+ibyte);
      }
      savg = savg / csize;
      System.out.println("smin="+smin+", smax="+smax+", savg="+savg);

      nbread = nbread+csize;
      System.out.println(nbread+" bytes read so far");
      // read rest of chunks
      while(nbread+17<fsize)
      {
        for(int i=0; i<4; i++) more[i] = (char)ds.read();
        System.out.println("4 bytes should be WAVE "+
                           more[0]+more[1]+more[2]+more[3]);

        csize = 0;
        smax = 1;
        for(int i=0; i<4; i++) { csize += ds.read()*smax; smax *= 256;}
        System.out.println("chunk has "+csize+" bytes");

        for(int i=0; i<csize; i++)
        {
	  ibyte = ds.read(); // signed byte
          if(ibyte>127) ibyte = ibyte-256;
	}
        nbread = nbread+8+csize;
        System.out.println(nbread+" bytes read so far");
      }
      ds.close();
    }
    catch(Exception e)
    {
      System.out.println("test_read_byte, some exception thrown");
    }
    System.out.println("end test_byte_read.java");
  } // end test_byte_read constructor 

  public static void main (String[] args)
  {
    String inp = "ok.wav";
    if(args.length>0)
    {
      inp = args[0];
    }
    new test_byte_read(inp);
  } // end main
} // end class test_byte_read of test_byte_read.java