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/*
tpre_de.c
David Rowe
Sep 24 2012
Unit test to generate the combined impulse response of pre & de-emphasis filters.
pl("../unittest/out48.raw",1,3000)
pl("../unittest/out8.raw",1,3000)
Listening to it also shows up anything nasty:
$ play -s -2 -r 48000 out48.raw
$ play -s -2 -r 8000 out8.raw
*/
#include <assert.h>
#include <math.h>
#include <stdlib.h>
#include <stdio.h>
#include "lpc.h"
#define N 10
#define F 10
int main() {
FILE *fprede;
float Sn[N], Sn_pre[N], Sn_de[N];
float pre_mem = 0.0, de_mem = 0.0;
int i, f;
fprede = fopen("prede.txt", "wt");
assert(fprede != NULL);
for(i=0; i<N; i++)
Sn[i] = 0.0;
Sn[0]= 1.0;
for(f=0; f<F; f++) {
pre_emp(Sn_pre, Sn, &pre_mem, N);
de_emp(Sn_de, Sn_pre, &de_mem, N);
for(i=0; i<N; i++) {
fprintf(fprede, "%f\n", Sn_de[i]);
}
Sn[0] = 0.0;
}
fclose(fprede);
return 0;
}
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