/* rw_wav.h   read and write .wav files  not working for all .wav files */

typedef struct
{ char riff[4];
  int  fsize;
  char wave[4];
  char fmt[4];
  int  nbytes;
  short  ccode;
  short  channels;
  int rate;
  int avgrate;
  short blockalign;
  short bps; /* bits per sample */
  char data[4];
  int csize;
  char more[4];
} header;

void read_wave(char* file_name, header *w, char sound[]);

/* modify header if you know what you are doing */
void write_wave(char* file_name, header w, char sound[]);

/* may need to rescale into -127 .. 127 */
void rescale(int n, float zn[]);