// Lab2.cpp : Defines the entry point for the console application.
//

#include "stdafx.h"
#include <iostream>
#include <math.h>
#include <fstream>
#include <stdlib.h>
#include <time.h>

using namespace std;

int sample_count(float time, float sample) {
	int sample_count = 0;

	for (float i = 0; i <= time; i += sample) {
		sample_count++;
	}

	return sample_count;
}

void amplitude_modulation(float amplitude_info, float frequency_info, float phase_info, float amplitude_carry, float frequency_carry, float phase_carry, float time, float sample, float kAM, fstream& file, string name)
{
	file.open(name, ios::out);

	int N = sample_count(time, sample);
	float *m = new float[N]; //sygnał nośny
	float *s = new float[N]; //sygnał informacyjny
	float *w = new float[N]; //sygnał zmodulowany
	float i = 0;

	for (int t = 0; t < N; t++)
	{
		s[t] = amplitude_info * sin(2 * M_PI * frequency_info * i + phase_info);
		m[t] = amplitude_carry * sin(2 * M_PI * frequency_carry * i + phase_carry);
		w[t] = m[t] * ((kAM * s[t]) + 1);
		file << s[t] << "," << m[t] << "," << w[t] << endl;
		i += sample;
		if (i > time) {
			break;
		}
	}

	delete m, s, w;
	file.close();
}

void frequency_modulation(float amplitude_signal, float pulsation_signal, float phase_signal, float time, float sample, float amplitude, float frequency, float kFM, fstream& file, string name)
{
	file.open(name, ios::out);

	int N = sample_count(time, sample);

	float *s = new float[N];
	float *w = new float[N];
	float i = 0;

	int index = 0;
	for (float i = 0; i <= time; i += sample) {
		s[index] = amplitude_signal * sin(pulsation_signal * i + phase_signal);
		index++;
	}

	for (int t = 0; t < N; t++)
	{
		float O = (2 * M_PI * frequency * t) + (kFM *s[t]);
		w[t] = amplitude * cos(O);
		file << s[t] << "," << w[t] << endl;
		i += sample;
	}

	file.close();
}

int main()
{
	fstream modulation;
	amplitude_modulation(1, 40, 1, 2, 20, 1, 2, 0.001, 2, modulation, "amplitude_modulation.csv");
	frequency_modulation(1, 251.327, 1, 2, 0.001, 1, 5, 20, modulation, "frequency_modulation.csv");
	system("pause");
    return 0;
}