Hash :
0cc14f3d
Author :
Thomas de Grivel
Date :
2021-02-20T23:06:51
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72
/*
* Copyright 2018-2021 Thomas de Grivel <thoxdg@gmail.com>
* 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 <float.h>
#include <math.h>
#include <stdio.h>
#include "../../librtbuf/rtbuf.h"
#include "../../librtbuf/lib.h"
#include "../signal.h"
#include "../signal_type.h"
s_rtbuf_lib_proc_in rtbuf_signal_sinus_in[] =
{{ "frequency", RTBUF_SIGNAL_TYPE, 220.0, 20.0, RTBUF_SIGNAL_SAMPLERATE / 2.0, 2.0 },
{ "amplitude", RTBUF_SIGNAL_TYPE, 1.0, 0.001, 1.0, 10.0 },
{ 0, 0, 0.0, 0.0, 0.0, 0.0 }};
s_rtbuf_lib_proc_out rtbuf_signal_sinus_out[] =
{{ "signal", RTBUF_SIGNAL_TYPE },
{ "phase", "double" },
{ 0, 0 }};
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;
}
s_rtbuf_lib_proc rtbuf_lib_proc =
{ "sinus", rtbuf_signal_sinus, rtbuf_signal_sinus_start, 0,
rtbuf_signal_sinus_in, rtbuf_signal_sinus_out };
unsigned long rtbuf_lib_ver = RTBUF_LIB_VER;