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/*
* The MIT License (MIT)
*
* Copyright (c) 2018 Maximilien Cuony, Matthias P. Braendli
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include <stdio.h>
#include <stdlib.h>
#include <math.h>
#include "vc.h"
#include "Audio/tone.h"
#define FLOAT_PI 3.1415926535897932384f
int main(int argc, char **argv)
{
printf("Hello, ver %s\n", vc_get_version());
printf("Saving results to tone.csv\n");
printf("freq, threshold, num_samples, detector_output, avg_rms\n");
FILE *fd = fopen("tone.csv", "w");
if (!fd) {
printf("Cannot create file\n");
return 1;
}
const int freq_start = 1750 - 175;
const int freq_stop = 1750 + 175;
for (int freq = freq_start; freq < freq_stop; freq += 4) {
for (int threshold = 100000; threshold < 4000000; threshold += 100000) {
tone_init(threshold);
double accu = 0;
for (size_t j = 0; j < 100; j++) {
const float samplef = cosf(j * 2.0f * FLOAT_PI * freq / AUDIO_IN_RATE);
const float noisef = (drand48() * 2.0f) - 1;
int16_t sample = (0.9f * samplef + 0.1f * noisef) * 32767.0f;
accu += (sample * sample);
int r = tone_detect_1750(sample);
if (r != -1) {
const double rms = sqrt(accu / (double)j);
fprintf(fd, "%d,%d,%zu,%d,%f\n",freq, threshold, j, r, rms);
}
}
}
}
}
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