TOOLS/alaw-gen.c

   1 #include <stdio.h>
   2 #include <stdlib.h>
   3
   4 // sox -t raw -A -r 8000 -b alaw.alaw -t sw alaw.out
   5
   6 int main(){
   7 int i;
   8 FILE *f;
   9
  10 f=fopen("alaw.dat","wb");
  11 for(i=0;i<256;i++) fwrite(&i,1,1,f);
  12 fclose(f);
  13
  14 system("sox -t raw -A -r 8000 -b alaw.dat -t sw alaw.out");
  15
  16 printf("// Generated by TOOLS/alaw-gen.c\n");
  17
  18 printf("\nshort alaw2short[]={\n");
  19
  20 f=fopen("alaw.out","rb");
  21 for(i=0;i<256;i++){
  22   signed short x;
  23   fread(&x,2,1,f);
  24   printf("%6d",x);
  25   if(i!=255) putchar(',');
  26   if((i&7)==7) printf("\n");
  27 }
  28 fclose(f);
  29 printf("};\n");
  30
  31 system("sox -t raw -U -r 8000 -b alaw.dat -t sw alaw.out");
  32
  33 printf("\nshort ulaw2short[]={\n");
  34
  35 f=fopen("alaw.out","rb");
  36 for(i=0;i<256;i++){
  37   signed short x;
  38   fread(&x,2,1,f);
  39   printf("%6d",x);
  40   if(i!=255) putchar(',');
  41   if((i&7)==7) printf("\n");
  42 }
  43 fclose(f);
  44 printf("};\n");
  45
  46
  47 }