AquaMorph/ES-5-Pipewire
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Working DSP

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This commit is contained in:
Christian Colglazier 2021-10-10 11:49:11 -04:00
parent e828038729
commit de1031a3f8
2 changed files with 47 additions and 20 deletions
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2
Makefile
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@ -5,7 +5,7 @@ NAME = es-5
LDLIBS += `pkg-config --cflags --libs libpipewire-0.3` LDLIBS += `pkg-config --cflags --libs libpipewire-0.3`
es-5: es-5.c es-5: es-5.c
$(CXX) $(CXXFLAGS) es-5.c -o $(NAME) $(LDLIBS) $(CXX) $(CXXFLAGS) es-5.c -o $(NAME) $(LDLIBS) -lm
all: es-5 all: es-5

65
es-5.c
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@ -1,28 +1,55 @@
#include <math.h>
#include <spa/param/latency-utils.h> #include <spa/param/latency-utils.h>
#include <pipewire/pipewire.h> #include <pipewire/pipewire.h>
#define ES_5_RANGE 128
#define GATE_LOW_EDGE 0.1
struct data; struct data;
struct port { struct port {
struct data *data; struct data *data;
double accumulator;
}; };
struct data { struct data {
struct pw_main_loop *loop; struct pw_main_loop *loop;
struct pw_filter *filter; struct pw_filter *filter;
struct port *in_port_one; struct port *in_ports[8];
struct port *in_port_two;
struct port *in_port_three;
struct port *in_port_four;
struct port *in_port_five;
struct port *in_port_six;
struct port *in_port_seven;
struct port *in_port_eight;
struct port *out_port; struct port *out_port;
}; };
static void on_process(void *userdata, struct spa_io_position *position) {} static void on_process(void *userdata, struct spa_io_position *position) {
struct data *data = userdata;
float *in, *out;
uint32_t i, n_samples = position->clock.duration;
struct port *out_port = data->out_port;
float signal = 0.5f;
// Read Inputs 1-7
out = pw_filter_get_dsp_buffer(data->out_port, n_samples);
for (int input = 0; input < 7; input++) {
in = pw_filter_get_dsp_buffer(data->in_ports[input], n_samples);
if(*in > GATE_LOW_EDGE) {
signal += pow(2, input);
}
}
// Read Input 8
in = pw_filter_get_dsp_buffer(data->in_ports[7], n_samples);
if(*in > GATE_LOW_EDGE) {
signal = -ES_5_RANGE+signal;
}
// Convert signal to expect output scale
signal = signal / ES_5_RANGE;
// Send to output
for (i = 0; i < n_samples; i++) {
out_port->accumulator = (double) signal;
*out++ = out_port->accumulator;
}
}
static void do_quit(void *userdata, int signal_number) { static void do_quit(void *userdata, int signal_number) {
struct data *data = userdata; struct data *data = userdata;
@ -70,14 +97,14 @@ int main(int argc, char *argv[]) {
&filter_events, &filter_events,
&data); &data);
data.in_port_one = add_port("input_1", data); data.in_ports[0] = add_port("input_1", data);
data.in_port_two = add_port("input_2", data); data.in_ports[1] = add_port("input_2", data);
data.in_port_three = add_port("input_3", data); data.in_ports[2] = add_port("input_3", data);
data.in_port_four = add_port("input_4", data); data.in_ports[3] = add_port("input_4", data);
data.in_port_five = add_port("input_5", data); data.in_ports[4] = add_port("input_5", data);
data.in_port_six = add_port("input_6", data); data.in_ports[5] = add_port("input_6", data);
data.in_port_seven = add_port("input_7", data); data.in_ports[6] = add_port("input_7", data);
data.in_port_eight = add_port("input_8", data); data.in_ports[7] = add_port("input_8", data);
data.out_port = pw_filter_add_port(data.filter, data.out_port = pw_filter_add_port(data.filter,
PW_DIRECTION_OUTPUT, PW_DIRECTION_OUTPUT,