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/*
pre.c
David Rowe
Sep 26 2012
Takes audio from a file, pre-emphasises, and sends to output file.
*/
#include <assert.h>
#include <math.h>
#include <errno.h>
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include "lpc.h"
#define N 80
int main(int argc, char*argv[]) {
FILE *fin, *fout;
short buf[N];
float Sn[N], Sn_pre[N];
float pre_mem = 0.0;
int i;
if (argc != 3) {
printf("usage: pre InputRawSpeechFile OutputRawSpeechFile\n");
printf("e.g pre input.raw output.raw");
exit(1);
}
if (strcmp(argv[1], "-") == 0) fin = stdin;
else if ( (fin = fopen(argv[1],"rb")) == NULL ) {
fprintf(stderr, "Error opening input speech file: %s: %s.\n",
argv[1], strerror(errno));
exit(1);
}
if (strcmp(argv[2], "-") == 0) fout = stdout;
else if ( (fout = fopen(argv[2],"wb")) == NULL ) {
fprintf(stderr, "Error opening output speech file: %s: %s.\n",
argv[2], strerror(errno));
exit(1);
}
while(fread(buf, sizeof(short), N, fin) == N) {
for(i=0; i<N; i++)
Sn[i] = buf[i];
pre_emp(Sn_pre, Sn, &pre_mem, N);
for(i=0; i<N; i++)
buf[i] = Sn_pre[i];
fwrite(buf, sizeof(short), N, fout);
}
fclose(fin);
fclose(fout);
return 0;
}
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