mpv/TOOLS/alaw-gen.c

#include <stdio.h>
#include <stdlib.h>

// sox -t raw -A -r 8000 -b alaw.alaw -t sw alaw.out

int main(void){
int i;
FILE *f;

f=fopen("alaw.dat","wb");
for(i=0;i<256;i++) fwrite(&i,1,1,f);
fclose(f);

system("sox -t raw -A -r 8000 -b alaw.dat -t sw alaw.out");

printf("// Generated by TOOLS/alaw-gen.c\n\n");

printf("#ifndef ALAW_H\n");
printf("#define ALAW_H\n");

printf("\nconst short alaw2short[]={\n");

f=fopen("alaw.out","rb");
for(i=0;i<256;i++){
  signed short x;
  fread(&x,2,1,f);
  printf("%7d",x);
  if(i!=255) putchar(',');
  if((i&7)==7) printf("\n");
}
fclose(f);
printf("};\n");

system("sox -t raw -U -r 8000 -b alaw.dat -t sw alaw.out");

printf("\nconst short ulaw2short[]={\n");

f=fopen("alaw.out","rb");
for(i=0;i<256;i++){
  signed short x;
  fread(&x,2,1,f);
  printf("%7d",x);
  if(i!=255) putchar(',');
  if((i&7)==7) printf("\n");
}
fclose(f);
printf("};\n\n");

printf("#endif /* ALAW_H */\n");

return 0;
}