Hash :
17752a6c
Author :
Thomas de Grivel
Date :
2020-03-04T14:03:48
Downgrade to C89 = ANSI C
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/*
* Copyright 2018 Thomas de Grivel <thoxdg@gmail.com> +33614550127
* Copyright 2018 Judy Najnudel <judy.najnudel@gmail.com>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <math.h>
#include <stdio.h>
#include "rtbuf.h"
#include "rtbuf_signal.h"
int rtbuf_signal_sinus_start (s_rtbuf *rtb)
{
s_rtbuf_signal_sinus_data *data;
assert(rtb->proc->out_bytes == sizeof(*data));
data = (s_rtbuf_signal_sinus_data*) rtb->data;
data->phase = 0;
return 0;
}
int rtbuf_signal_sinus (s_rtbuf *rtb)
{
s_rtbuf_signal_fun freq;
s_rtbuf_signal_fun amp;
s_rtbuf_signal_sinus_data *data;
unsigned int i = 0;
rtbuf_signal_fun(rtb, RTBUF_SIGNAL_SINUS_IN_FREQUENCY, &freq);
rtbuf_signal_fun(rtb, RTBUF_SIGNAL_SINUS_IN_AMPLITUDE, &);
data = (s_rtbuf_signal_sinus_data*) rtb->data;
while (i < RTBUF_SIGNAL_SAMPLES) {
double f = freq.sample_fun(freq.signal, i);
double a = amp.sample_fun(amp.signal, i);
f = max(0.0, f);
a = max(0.0, a);
f /= (double) RTBUF_SIGNAL_SAMPLERATE;
data->phase = fmod(data->phase + 2.0 * M_PI * f, 2.0 * M_PI);
data->signal[i] = a * sin(data->phase);
/* printf(" i=%u f=%f a=%f %f", i, f, a, data->samples[i]); */
i++;
}
return 0;
}