Commit 2aeac2a6c3ec0f8b382840967ae96d76e3646ab5
2020-02-20T09:46:11
wip Butterworth second order 10 band equalizer
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diff --git a/Makefile.am b/Makefile.am
index 49621d9..56d6552 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -91,6 +91,7 @@ librtbuf_signal_la_SOURCES = \
rtbuf_signal.c \
rtbuf_signal_bandpass2.c \
rtbuf_signal_delay.c \
+ rtbuf_signal_equalizer10.c \
rtbuf_signal_flanger.c \
rtbuf_signal_hipass.c \
rtbuf_signal_hipass2.c \
diff --git a/rtbuf_signal.c b/rtbuf_signal.c
index c679dab..f8b318c 100644
--- a/rtbuf_signal.c
+++ b/rtbuf_signal.c
@@ -57,6 +57,78 @@ s_rtbuf_lib_proc_out g_rtbuf_signal_delay_out[] = {
{ "pos", "unsigned int" },
{ 0, 0 } };
+s_rtbuf_lib_proc_in g_rtbuf_signal_equalizer10_in[] = {
+ { "signal", RTBUF_SIGNAL_TYPE, 0.0, -1.0, 1.0 },
+ { "amp32", RTBUF_SIGNAL_TYPE, 1.0, 0.0, 10.0 },
+ { "amp64", RTBUF_SIGNAL_TYPE, 1.0, 0.0, 10.0 },
+ { "amp128", RTBUF_SIGNAL_TYPE, 1.0, 0.0, 10.0 },
+ { "amp256", RTBUF_SIGNAL_TYPE, 1.0, 0.0, 10.0 },
+ { "amp512", RTBUF_SIGNAL_TYPE, 1.0, 0.0, 10.0 },
+ { "amp1k", RTBUF_SIGNAL_TYPE, 1.0, 0.0, 10.0 },
+ { "amp2k", RTBUF_SIGNAL_TYPE, 1.0, 0.0, 10.0 },
+ { "amp4k", RTBUF_SIGNAL_TYPE, 1.0, 0.0, 10.0 },
+ { "amp8k", RTBUF_SIGNAL_TYPE, 1.0, 0.0, 10.0 },
+ { "amp16k", RTBUF_SIGNAL_TYPE, 1.0, 0.0, 10.0 },
+ { 0, 0, 0.0, 0.0, 0.0 } };
+
+s_rtbuf_lib_proc_out g_rtbuf_signal_equalizer10_out[] = {
+ { "signal", RTBUF_SIGNAL_TYPE },
+ { "signal32", RTBUF_SIGNAL_TYPE },
+ { "signal64", RTBUF_SIGNAL_TYPE },
+ { "signal128", RTBUF_SIGNAL_TYPE },
+ { "signal256", RTBUF_SIGNAL_TYPE },
+ { "signal512", RTBUF_SIGNAL_TYPE },
+ { "signal1k", RTBUF_SIGNAL_TYPE },
+ { "signal2k", RTBUF_SIGNAL_TYPE },
+ { "signal4k", RTBUF_SIGNAL_TYPE },
+ { "signal8k", RTBUF_SIGNAL_TYPE },
+ { "signal16k", RTBUF_SIGNAL_TYPE },
+ { "x1", RTBUF_SIGNAL_SAMPLE_TYPE },
+ { "x2", RTBUF_SIGNAL_SAMPLE_TYPE },
+ { "x3", RTBUF_SIGNAL_SAMPLE_TYPE },
+ { "x4", RTBUF_SIGNAL_SAMPLE_TYPE },
+ { "y0_1", RTBUF_SIGNAL_SAMPLE_TYPE },
+ { "y0_2", RTBUF_SIGNAL_SAMPLE_TYPE },
+ { "y0_3", RTBUF_SIGNAL_SAMPLE_TYPE },
+ { "y0_4", RTBUF_SIGNAL_SAMPLE_TYPE },
+ { "y1_1", RTBUF_SIGNAL_SAMPLE_TYPE },
+ { "y1_2", RTBUF_SIGNAL_SAMPLE_TYPE },
+ { "y1_3", RTBUF_SIGNAL_SAMPLE_TYPE },
+ { "y1_4", RTBUF_SIGNAL_SAMPLE_TYPE },
+ { "y2_1", RTBUF_SIGNAL_SAMPLE_TYPE },
+ { "y2_2", RTBUF_SIGNAL_SAMPLE_TYPE },
+ { "y2_3", RTBUF_SIGNAL_SAMPLE_TYPE },
+ { "y2_4", RTBUF_SIGNAL_SAMPLE_TYPE },
+ { "y3_1", RTBUF_SIGNAL_SAMPLE_TYPE },
+ { "y3_2", RTBUF_SIGNAL_SAMPLE_TYPE },
+ { "y3_3", RTBUF_SIGNAL_SAMPLE_TYPE },
+ { "y3_4", RTBUF_SIGNAL_SAMPLE_TYPE },
+ { "y4_1", RTBUF_SIGNAL_SAMPLE_TYPE },
+ { "y4_2", RTBUF_SIGNAL_SAMPLE_TYPE },
+ { "y4_3", RTBUF_SIGNAL_SAMPLE_TYPE },
+ { "y4_4", RTBUF_SIGNAL_SAMPLE_TYPE },
+ { "y5_1", RTBUF_SIGNAL_SAMPLE_TYPE },
+ { "y5_2", RTBUF_SIGNAL_SAMPLE_TYPE },
+ { "y5_3", RTBUF_SIGNAL_SAMPLE_TYPE },
+ { "y5_4", RTBUF_SIGNAL_SAMPLE_TYPE },
+ { "y6_1", RTBUF_SIGNAL_SAMPLE_TYPE },
+ { "y6_2", RTBUF_SIGNAL_SAMPLE_TYPE },
+ { "y6_3", RTBUF_SIGNAL_SAMPLE_TYPE },
+ { "y6_4", RTBUF_SIGNAL_SAMPLE_TYPE },
+ { "y7_1", RTBUF_SIGNAL_SAMPLE_TYPE },
+ { "y7_2", RTBUF_SIGNAL_SAMPLE_TYPE },
+ { "y7_3", RTBUF_SIGNAL_SAMPLE_TYPE },
+ { "y7_4", RTBUF_SIGNAL_SAMPLE_TYPE },
+ { "y8_1", RTBUF_SIGNAL_SAMPLE_TYPE },
+ { "y8_2", RTBUF_SIGNAL_SAMPLE_TYPE },
+ { "y8_3", RTBUF_SIGNAL_SAMPLE_TYPE },
+ { "y8_4", RTBUF_SIGNAL_SAMPLE_TYPE },
+ { "y9_1", RTBUF_SIGNAL_SAMPLE_TYPE },
+ { "y9_2", RTBUF_SIGNAL_SAMPLE_TYPE },
+ { "y9_3", RTBUF_SIGNAL_SAMPLE_TYPE },
+ { "y9_4", RTBUF_SIGNAL_SAMPLE_TYPE },
+ { 0, 0 } };
+
s_rtbuf_lib_proc_in g_rtbuf_signal_flanger_in[] = {
{ "signal", RTBUF_SIGNAL_TYPE, 0.0, -1.0, 1.0 },
{ "frequency", RTBUF_SIGNAL_TYPE, 0.5, 0.0, RTBUF_SIGNAL_SAMPLERATE / 2.0 },
@@ -251,6 +323,8 @@ s_rtbuf_lib_proc rtbuf_lib_proc[] = {
g_rtbuf_signal_bandpass2_in, g_rtbuf_signal_bandpass2_out },
{ "delay", rtbuf_signal_delay, rtbuf_signal_delay_start, 0,
g_rtbuf_signal_delay_in, g_rtbuf_signal_delay_out },
+ { "equalizer10", rtbuf_signal_equalizer10, rtbuf_signal_equalizer10_start, 0,
+ g_rtbuf_signal_equalizer10_in, g_rtbuf_signal_equalizer10_out },
{ "flanger", rtbuf_signal_flanger, rtbuf_signal_flanger_start, 0,
g_rtbuf_signal_flanger_in, g_rtbuf_signal_flanger_out },
{ "hipass", rtbuf_signal_hipass, rtbuf_signal_hipass_start, 0,
@@ -360,3 +434,5 @@ void rtbuf_signal_fun (s_rtbuf *rtb,
rsf->sample_fun = rtbuf_signal_sample_from_signal;
}
}
+
+const double sqrt2_2 = M_SQRT2 * M_SQRT2;
diff --git a/rtbuf_signal.h b/rtbuf_signal.h
index e74c0a4..da5150c 100644
--- a/rtbuf_signal.h
+++ b/rtbuf_signal.h
@@ -100,15 +100,95 @@ typedef struct rtbuf_signal_delay_data {
#pragma pack(pop)
enum {
- RTBUF_SIGNAL_DELAY_IN_SIGNAL = 0,
- RTBUF_SIGNAL_DELAY_IN_DELAY,
- RTBUF_SIGNAL_DELAY_IN_FEEDBACK,
- RTBUF_SIGNAL_DELAY_INS
+ RTBUF_SIGNAL_DELAY_IN_SIGNAL = 0,
+ RTBUF_SIGNAL_DELAY_IN_DELAY,
+ RTBUF_SIGNAL_DELAY_IN_FEEDBACK,
+ RTBUF_SIGNAL_DELAY_INS
};
int rtbuf_signal_delay (s_rtbuf *rtb);
int rtbuf_signal_delay_start (s_rtbuf *rtb);
+/* butterworth second order 10 band equalizer */
+
+#pragma pack(push,1)
+typedef struct rtbuf_signal_equalizer10_data {
+ t_rtbuf_signal signal;
+ t_rtbuf_signal signal32;
+ t_rtbuf_signal signal64;
+ t_rtbuf_signal signal128;
+ t_rtbuf_signal signal256;
+ t_rtbuf_signal signal512;
+ t_rtbuf_signal signal1k;
+ t_rtbuf_signal signal2k;
+ t_rtbuf_signal signal4k;
+ t_rtbuf_signal signal8k;
+ t_rtbuf_signal signal16k;
+ t_rtbuf_signal_sample x1;
+ t_rtbuf_signal_sample x2;
+ t_rtbuf_signal_sample x3;
+ t_rtbuf_signal_sample x4;
+ t_rtbuf_signal_sample y0_1;
+ t_rtbuf_signal_sample y0_2;
+ t_rtbuf_signal_sample y0_3;
+ t_rtbuf_signal_sample y0_4;
+ t_rtbuf_signal_sample y1_1;
+ t_rtbuf_signal_sample y1_2;
+ t_rtbuf_signal_sample y1_3;
+ t_rtbuf_signal_sample y1_4;
+ t_rtbuf_signal_sample y2_1;
+ t_rtbuf_signal_sample y2_2;
+ t_rtbuf_signal_sample y2_3;
+ t_rtbuf_signal_sample y2_4;
+ t_rtbuf_signal_sample y3_1;
+ t_rtbuf_signal_sample y3_2;
+ t_rtbuf_signal_sample y3_3;
+ t_rtbuf_signal_sample y3_4;
+ t_rtbuf_signal_sample y4_1;
+ t_rtbuf_signal_sample y4_2;
+ t_rtbuf_signal_sample y4_3;
+ t_rtbuf_signal_sample y4_4;
+ t_rtbuf_signal_sample y5_1;
+ t_rtbuf_signal_sample y5_2;
+ t_rtbuf_signal_sample y5_3;
+ t_rtbuf_signal_sample y5_4;
+ t_rtbuf_signal_sample y6_1;
+ t_rtbuf_signal_sample y6_2;
+ t_rtbuf_signal_sample y6_3;
+ t_rtbuf_signal_sample y6_4;
+ t_rtbuf_signal_sample y7_1;
+ t_rtbuf_signal_sample y7_2;
+ t_rtbuf_signal_sample y7_3;
+ t_rtbuf_signal_sample y7_4;
+ t_rtbuf_signal_sample y8_1;
+ t_rtbuf_signal_sample y8_2;
+ t_rtbuf_signal_sample y8_3;
+ t_rtbuf_signal_sample y8_4;
+ t_rtbuf_signal_sample y9_1;
+ t_rtbuf_signal_sample y9_2;
+ t_rtbuf_signal_sample y9_3;
+ t_rtbuf_signal_sample y9_4;
+} s_rtbuf_signal_equalizer10_data;
+#pragma pack(pop)
+
+enum {
+ RTBUF_SIGNAL_EQUALIZER10_IN_SIGNAL = 0,
+ RTBUF_SIGNAL_EQUALIZER10_IN_AMP32,
+ RTBUF_SIGNAL_EQUALIZER10_IN_AMP64,
+ RTBUF_SIGNAL_EQUALIZER10_IN_AMP128,
+ RTBUF_SIGNAL_EQUALIZER10_IN_AMP256,
+ RTBUF_SIGNAL_EQUALIZER10_IN_AMP512,
+ RTBUF_SIGNAL_EQUALIZER10_IN_AMP1K,
+ RTBUF_SIGNAL_EQUALIZER10_IN_AMP2K,
+ RTBUF_SIGNAL_EQUALIZER10_IN_AMP4K,
+ RTBUF_SIGNAL_EQUALIZER10_IN_AMP8K,
+ RTBUF_SIGNAL_EQUALIZER10_IN_AMP16K,
+ RTBUF_SIGNAL_EQUALIZER10_INS
+};
+
+int rtbuf_signal_equalizer10 (s_rtbuf *rtb);
+int rtbuf_signal_equalizer10_start (s_rtbuf *rtb);
+
/* flanger */
#define RTBUF_SIGNAL_FLANGER_MAX 1
@@ -356,4 +436,6 @@ typedef struct rtbuf_signal_square_data {
int rtbuf_signal_square (s_rtbuf *rtb);
int rtbuf_signal_square_start (s_rtbuf *rtb);
+const double sqrt2_2;
+
#endif /* RTBUF_SIGNAL_H */
diff --git a/rtbuf_signal_bandpass2.c b/rtbuf_signal_bandpass2.c
index cde5741..911d32c 100644
--- a/rtbuf_signal_bandpass2.c
+++ b/rtbuf_signal_bandpass2.c
@@ -49,8 +49,6 @@ y: (4 f2 w2 (x4 - 2 x2 + x) - (b y1 + c y2 + d y3 + e y4)) / a;
#include "rtbuf.h"
#include "rtbuf_signal.h"
-const double sqrt2_2 = M_SQRT2 * M_SQRT2;
-
int rtbuf_signal_bandpass2_start (s_rtbuf *rtb)
{
s_rtbuf_signal_bandpass2_data *data;
diff --git a/rtbuf_signal_equalizer10.c b/rtbuf_signal_equalizer10.c
new file mode 100644
index 0000000..a1e1f84
--- /dev/null
+++ b/rtbuf_signal_equalizer10.c
@@ -0,0 +1,303 @@
+/*
+ * Copyright 2020 Thomas de Grivel <thoxdg@gmail.com> +33614550127
+ *
+ * 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.
+ */
+/* Butterworth bandpass second order filter
+s: 2*f*(1-z)/(1+z) $
+B2: (q*(s/w+w/s))^2+sqrt(2)*(q*(s/w+w/s))+1 $
+H: 1/B2 $
+ratsimp(H);
+ 2 2 4 2 2 2 2 2
+(%o25) (4 f w z - 8 f w z + 4 f w )
+ 2 4 3/2 3 2 2 2 2 7/2 3 4 2 4
+/((q w - 2 f q w + (8 f q + 4 f ) w - 2 f q w + 16 f q ) z
+ 2 4 5/2 3 9/2 3 4 2 3
+ + (4 q w - 2 f q w + 2 f q w - 64 f q ) z
+ 2 4 2 2 2 2 4 2 2
+ + (6 q w + ((- 16 f q ) - 8 f ) w + 96 f q ) z
+ 2 4 5/2 3 9/2 3 4 2 2 4 3/2 3
+ + (4 q w + 2 f q w - 2 f q w - 64 f q ) z + q w + 2 f q w
+ 2 2 2 2 7/2 3 4 2
+ + (8 f q + 4 f ) w + 2 f q w + 16 f q )
+
+a: q2 w4 + sqrt(2)^3 f q w3 + (8 f2 q2 + 4 f2) w2 + sqrt(2)^7 f3 q w + 16 f4 q2;
+b: 4 q2 w4 + sqrt(2)^5 f q w3 - sqrt(2)^9 f3 q w - 64 f4 q2;
+c: 6 q2 w4 - 2 (8 f2 q2 + 4 f2) w2 + 96 f4 q2;
+d: 4 q2 w4 - sqrt(2)^5 f q w3 + sqrt(2)^9 f3 q w - 64 f4 q2;
+e: q2 w4 - sqrt(2)^3 f q w3 + (8 f2 q2 + 4 f2) w2 - sqrt(2)^7 f3 q w + 16 f4 q2;
+-----------------------------------------------------------------------------------
+a: q2 w4 + sqrt(2)^3 f q w3 + (2 q2 + 1) 4 f2 w2 + sqrt(2)^7 f3 q w + 16 f4 q2;
+b: 4 q2 w4 + sqrt(2)^5 f q w3 - sqrt(2)^9 f3 q w - 64 f4 q2;
+c: 6 q2 w4 - 2 (2 q2 + 1) 4 f2 w2 + 96 f4 q2;
+d: 4 q2 w4 - sqrt(2)^5 f q w3 + sqrt(2)^9 f3 q w - 64 f4 q2;
+e: q2 w4 - sqrt(2)^3 f q w3 + (2 q2 + 1) 4 f2 w2 - sqrt(2)^7 f3 q w + 16 f4 q2;
+-----------------------------------------------------------------------------------
+y: (4 f2 w2 (x4 - 2 x2 + x) - (b y1 + c y2 + d y3 + e y4)) / a;
+
+12db/octave
+fc: -3db
+3/12 = 1/4 octave = 3/4 et 5/4
+q: 2
+*/
+#include <math.h>
+#include "rtbuf.h"
+#include "rtbuf_signal.h"
+
+double sqrt2_3 = 0.0;
+double sqrt2_5;
+double sqrt2_7;
+double sqrt2_9;
+double f;
+double f2;
+double f3;
+double f4;
+
+int rtbuf_signal_equalizer10_start (s_rtbuf *rtb)
+{
+ s_rtbuf_signal_equalizer10_data *data;
+ assert(rtb->proc->out_bytes == sizeof(*data));
+ data = (s_rtbuf_signal_equalizer10_data*) rtb->data;
+ data->x1 = 0.0;
+ data->x2 = 0.0;
+ data->x3 = 0.0;
+ data->x4 = 0.0;
+ data->y0_1 = 0.0;
+ data->y0_2 = 0.0;
+ data->y0_3 = 0.0;
+ data->y0_4 = 0.0;
+ data->y1_1 = 0.0;
+ data->y1_2 = 0.0;
+ data->y1_3 = 0.0;
+ data->y1_4 = 0.0;
+ data->y2_1 = 0.0;
+ data->y2_2 = 0.0;
+ data->y2_3 = 0.0;
+ data->y2_4 = 0.0;
+ data->y3_1 = 0.0;
+ data->y3_2 = 0.0;
+ data->y3_3 = 0.0;
+ data->y3_4 = 0.0;
+ data->y4_1 = 0.0;
+ data->y4_2 = 0.0;
+ data->y4_3 = 0.0;
+ data->y4_4 = 0.0;
+ data->y5_1 = 0.0;
+ data->y5_2 = 0.0;
+ data->y5_3 = 0.0;
+ data->y5_4 = 0.0;
+ data->y6_1 = 0.0;
+ data->y6_2 = 0.0;
+ data->y6_3 = 0.0;
+ data->y6_4 = 0.0;
+ data->y7_1 = 0.0;
+ data->y7_2 = 0.0;
+ data->y7_3 = 0.0;
+ data->y7_4 = 0.0;
+ data->y8_1 = 0.0;
+ data->y8_2 = 0.0;
+ data->y8_3 = 0.0;
+ data->y8_4 = 0.0;
+ data->y9_1 = 0.0;
+ data->y9_2 = 0.0;
+ data->y9_3 = 0.0;
+ data->y9_4 = 0.0;
+ sqrt2_3 = sqrt2_2 * M_SQRT2;
+ sqrt2_5 = sqrt2_3 * sqrt2_2;
+ sqrt2_7 = sqrt2_5 * sqrt2_2;
+ sqrt2_9 = sqrt2_7 * sqrt2_2;
+ f = RTBUF_SIGNAL_SAMPLERATE;
+ f2 = f * f;
+ f3 = f2 * f;
+ f4 = f2 * f2;
+ return 0;
+}
+
+double butterworth_bandpass2 (const double x, const double fc,
+ const double q, const double x2,
+ const double x4, const double y1,
+ const double y2, const double y3,
+ const double y4)
+{
+ const double q2 = q * q;
+ const double f4q2 = f4 * q2;
+ const double _16f4q2 = 16.0 * f4q2;
+ const double _64f4q2 = 64.0 * f4q2;
+ const double w = 2.0 * M_PI * fc;
+ const double f3qw = f3 * q * w;
+ const double sqrt2_7f3qw = sqrt2_7 * f3qw;
+ const double sqrt2_9f3qw = sqrt2_9 * f3qw;
+ const double w2 = w * w;
+ const double _4f2w2 = 4.0 * f2 * w2;
+ const double _2q2_1_4f2w2 = (2.0 * q2 + 1.0) * _4f2w2;
+ const double w3 = w2 * w;
+ const double fqw3 = f * q * w3;
+ const double sqrt2_3fqw3 = sqrt2_3 * fqw3;
+ const double sqrt2_5fqw3 = sqrt2_5 * fqw3;
+ const double w4 = w2 * w2;
+ const double q2w4 = q2 * w4;
+ const double _4q2w4 = 4.0 * q2w4;
+ const double a = q2w4 + sqrt2_3fqw3 + _2q2_1_4f2w2 + sqrt2_7f3qw + _16f4q2;
+ const double b = _4q2w4 + sqrt2_5fqw3 - sqrt2_9f3qw - _64f4q2;
+ const double c = 6.0 * q2w4 - 2.0 * _2q2_1_4f2w2 + 96.0 * f4q2;
+ const double d = _4q2w4 - sqrt2_5fqw3 + sqrt2_9f3qw - _64f4q2;
+ const double e = q2w4 - sqrt2_3fqw3 + _2q2_1_4f2w2 - sqrt2_7f3qw + _16f4q2;
+ const double y = (_4f2w2 * (x
+ - 2.0 * x2
+ + x4)
+ - (b * y1
+ + c * y2
+ + d * y3
+ + e * y4)) / a;
+ return y;
+}
+
+int rtbuf_signal_equalizer10 (s_rtbuf *rtb)
+{
+ s_rtbuf_signal_fun in;
+ s_rtbuf_signal_fun amp32;
+ s_rtbuf_signal_fun amp64;
+ s_rtbuf_signal_fun amp128;
+ s_rtbuf_signal_fun amp256;
+ s_rtbuf_signal_fun amp512;
+ s_rtbuf_signal_fun amp1k;
+ s_rtbuf_signal_fun amp2k;
+ s_rtbuf_signal_fun amp4k;
+ s_rtbuf_signal_fun amp8k;
+ s_rtbuf_signal_fun amp16k;
+ s_rtbuf_signal_equalizer10_data *data;
+ unsigned int i = 0;
+ rtbuf_signal_fun(rtb, RTBUF_SIGNAL_EQUALIZER10_IN_SIGNAL, &in);
+ rtbuf_signal_fun(rtb, RTBUF_SIGNAL_EQUALIZER10_IN_AMP32, &32);
+ rtbuf_signal_fun(rtb, RTBUF_SIGNAL_EQUALIZER10_IN_AMP64, &64);
+ rtbuf_signal_fun(rtb, RTBUF_SIGNAL_EQUALIZER10_IN_AMP128, &128);
+ rtbuf_signal_fun(rtb, RTBUF_SIGNAL_EQUALIZER10_IN_AMP256, &256);
+ rtbuf_signal_fun(rtb, RTBUF_SIGNAL_EQUALIZER10_IN_AMP512, &512);
+ rtbuf_signal_fun(rtb, RTBUF_SIGNAL_EQUALIZER10_IN_AMP1K, &1k);
+ rtbuf_signal_fun(rtb, RTBUF_SIGNAL_EQUALIZER10_IN_AMP2K, &2k);
+ rtbuf_signal_fun(rtb, RTBUF_SIGNAL_EQUALIZER10_IN_AMP4K, &4k);
+ rtbuf_signal_fun(rtb, RTBUF_SIGNAL_EQUALIZER10_IN_AMP8K, &8k);
+ rtbuf_signal_fun(rtb, RTBUF_SIGNAL_EQUALIZER10_IN_AMP16K, &16k);
+ data = (s_rtbuf_signal_equalizer10_data*) rtb->data;
+ while (i < RTBUF_SIGNAL_SAMPLES) {
+ const double x = in.sample_fun(in.signal, i);
+ const double a0 = amp32.sample_fun(amp32.signal, i);
+ const double a1 = amp32.sample_fun(amp64.signal, i);
+ const double a2 = amp32.sample_fun(amp128.signal, i);
+ const double a3 = amp32.sample_fun(amp256.signal, i);
+ const double a4 = amp32.sample_fun(amp512.signal, i);
+ const double a5 = amp32.sample_fun(amp1k.signal, i);
+ const double a6 = amp32.sample_fun(amp2k.signal, i);
+ const double a7 = amp32.sample_fun(amp4k.signal, i);
+ const double a8 = amp32.sample_fun(amp8k.signal, i);
+ const double a9 = amp32.sample_fun(amp16k.signal, i);
+ const double y0 = butterworth_bandpass2(x, 32.0, 2.0,
+ data->x2, data->x4,
+ data->y0_1, data->y0_2,
+ data->y0_3, data->y0_4);
+ const double y1 = butterworth_bandpass2(x, 64.0, 2.0,
+ data->x2, data->x4,
+ data->y1_1, data->y1_2,
+ data->y1_3, data->y1_4);
+ const double y2 = butterworth_bandpass2(x, 128.0, 2.0,
+ data->x2, data->x4,
+ data->y2_1, data->y2_2,
+ data->y2_3, data->y2_4);
+ const double y3 = butterworth_bandpass2(x, 256.0, 2.0,
+ data->x2, data->x4,
+ data->y3_1, data->y3_2,
+ data->y3_3, data->y3_4);
+ const double y4 = butterworth_bandpass2(x, 512.0, 2.0,
+ data->x2, data->x4,
+ data->y4_1, data->y4_2,
+ data->y4_3, data->y4_4);
+ const double y5 = butterworth_bandpass2(x, 1024.0, 2.0,
+ data->x2, data->x4,
+ data->y5_1, data->y5_2,
+ data->y5_3, data->y5_4);
+ const double y6 = butterworth_bandpass2(x, 2048.0, 2.0,
+ data->x2, data->x4,
+ data->y6_1, data->y6_2,
+ data->y6_3, data->y6_4);
+ const double y7 = butterworth_bandpass2(x, 4096.0, 2.0,
+ data->x2, data->x4,
+ data->y7_1, data->y7_2,
+ data->y7_3, data->y7_4);
+ const double y8 = butterworth_bandpass2(x, 8192.0, 2.0,
+ data->x2, data->x4,
+ data->y8_1, data->y8_2,
+ data->y8_3, data->y8_4);
+ const double y9 = butterworth_bandpass2(x, 16384.0, 2.0,
+ data->x2, data->x4,
+ data->y9_1, data->y9_2,
+ data->y9_3, data->y9_4);
+ data->signal[i] = (a0 * y0 + a1 * y1 + a2 * y2 + a3 * y3 + a4 * y4 +
+ a5 * y5 + a6 * y6 + a7 * y7 + a8 * y8 + a9 * y9);
+ data->signal32[i] = y0;
+ data->signal64[i] = y1;
+ data->signal128[i] = y2;
+ data->signal256[i] = y3;
+ data->signal512[i] = y4;
+ data->signal1k[i] = y5;
+ data->signal2k[i] = y6;
+ data->signal4k[i] = y7;
+ data->signal8k[i] = y8;
+ data->signal16k[i] = y9;
+ data->x4 = data->x3;
+ data->x3 = data->x2;
+ data->x2 = data->x1;
+ data->x1 = x;
+ data->y0_4 = data->y0_3;
+ data->y0_3 = data->y0_2;
+ data->y0_2 = data->y0_1;
+ data->y0_1 = y0;
+ data->y1_4 = data->y1_3;
+ data->y1_3 = data->y1_2;
+ data->y1_2 = data->y1_1;
+ data->y1_1 = y1;
+ data->y2_4 = data->y2_3;
+ data->y2_3 = data->y2_2;
+ data->y2_2 = data->y2_1;
+ data->y2_1 = y2;
+ data->y3_4 = data->y3_3;
+ data->y3_3 = data->y3_2;
+ data->y3_2 = data->y3_1;
+ data->y3_1 = y3;
+ data->y4_4 = data->y4_3;
+ data->y4_3 = data->y4_2;
+ data->y4_2 = data->y4_1;
+ data->y4_1 = y4;
+ data->y5_4 = data->y5_3;
+ data->y5_3 = data->y5_2;
+ data->y5_2 = data->y5_1;
+ data->y5_1 = y5;
+ data->y6_4 = data->y6_3;
+ data->y6_3 = data->y6_2;
+ data->y6_2 = data->y6_1;
+ data->y6_1 = y6;
+ data->y7_4 = data->y7_3;
+ data->y7_3 = data->y7_2;
+ data->y7_2 = data->y7_1;
+ data->y7_1 = y7;
+ data->y8_4 = data->y8_3;
+ data->y8_3 = data->y8_2;
+ data->y8_2 = data->y8_1;
+ data->y8_1 = y8;
+ data->y9_4 = data->y9_3;
+ data->y9_3 = data->y9_2;
+ data->y9_2 = data->y9_1;
+ data->y9_1 = y9;
+ i++;
+ }
+ return 0;
+}