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

#include "telephone.h"

int add_offhookwarning(FILE *stream, float f1, float f2, float f3, float f4, float length)
{
	float angle[4];
	size_t i;
	
	length *= SAMPLERATE;
	
	for (i = 0; i < length; ++i) {
		angle[0] = 2.*M_PI*i*f1/SAMPLERATE;
		angle[1] = 2.*M_PI*i*f2/SAMPLERATE;
		angle[2] = 2.*M_PI*i*f3/SAMPLERATE;
		angle[3] = 2.*M_PI*i*f4/SAMPLERATE;
		writesample(stream,
		  (long)floor((SAMPLERANGE>>3)*sinf(angle[0])
		  + (SAMPLERANGE>>3)*sinf(angle[1])
		  + (SAMPLERANGE>>3)*sinf(angle[2])
		  + (SAMPLERANGE>>3)*sinf(angle[3])));
	}
	
	return 0;
}

int main(int argc, char **argv)
{
	add_offhookwarning(stdout, 1400., 2060., 2450., 2600., 0.1);
	add_silence(stdout, .1);
	
	return 0;
}