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This commit is contained in:
Michael Sippel 2025-02-17 18:06:56 +01:00
parent 62acece204
commit a6970aeed3
Signed by: senvas
GPG key ID: 060F22F65102F95C
7 changed files with 315 additions and 342 deletions
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23
delay.c
View file

@ -1,12 +1,12 @@
#include <stdint.h>
#include <stddef.h>
#include <stdlib.h>
#include <stdio.h>
#include "delay.h"
#include <stddef.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
void delay_init(
struct delay * delay
) {
struct delay* delay)
{
delay->mix = 0.8;
delay->feedback = 0.8;
delay->duration = 0;
@ -17,8 +17,8 @@ void delay_init(
void delay_set_time(
struct delay* delay,
uint64_t new_duration
) {
uint64_t new_duration)
{
printf("set delay duration to %lu samples\n", new_duration);
if (new_duration > delay->buf_capacity) {
delay->buf_capacity = new_duration;
@ -39,12 +39,11 @@ void delay_process(
struct delay* delay,
size_t frame_size,
float const* in,
float * out
) {
float* out)
{
for (size_t i = 0; i < frame_size; ++i) {
if (delay->duration > 0) {
out[i] =
in[i]
out[i] = in[i]
+ delay->mix * delay->buf[delay->buf_idx];
delay->buf[delay->buf_idx] *= delay->feedback;

11
delay.h
View file

@ -1,7 +1,7 @@
#pragma once
#include <stdint.h>
#include <stddef.h>
#include <stdint.h>
struct delay {
uint64_t duration;
@ -14,17 +14,14 @@ struct delay {
};
void delay_init(
struct delay * delay
);
struct delay* delay);
void delay_set_time(
struct delay* delay,
uint64_t new_duration
);
uint64_t new_duration);
void delay_process(
struct delay* delay,
size_t frame_size,
float const* in,
float * out
);
float* out);

16
gate.c
View file

@ -1,13 +1,13 @@
#include <stdint.h>
#include <stddef.h>
#include <stdlib.h>
#include <stdio.h>
#include "gate.h"
#include <math.h>
#include <stddef.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
void gate_init(
struct gate * gate
) {
struct gate* gate)
{
gate->threshold = 0.0;
gate->enable_calibration = false;
@ -25,8 +25,8 @@ void gate_process(
struct gate* gate,
size_t frame_size,
float const* in,
float * out
) {
float* out)
{
bool act = false;

7
gate.h
View file

@ -1,8 +1,8 @@
#pragma once
#include <stdint.h>
#include <stddef.h>
#include <stdbool.h>
#include <stddef.h>
#include <stdint.h>
struct gate {
float threshold;
@ -25,5 +25,4 @@ void gate_process(
struct gate* gate,
size_t frame_size,
float const* in,
float * out
);
float* out);

108
guitfx.c
View file

@ -2,20 +2,20 @@
#include "pipewire/port.h"
#include "spa/pod/iter.h"
#include "spa/utils/defs.h"
#include <stdio.h>
#include <signal.h>
#include <stdio.h>
#include <spa/pod/pod.h>
#include <spa/pod/builder.h>
#include <spa/control/control.h>
#include <spa/param/latency-utils.h>
#include <spa/pod/builder.h>
#include <spa/pod/pod.h>
#include <pipewire/pipewire.h>
#include <pipewire/filter.h>
#include <pipewire/pipewire.h>
#include "delay.h"
#include "sust.h"
#include "gate.h"
#include "sust.h"
float envelope(float x);
@ -63,27 +63,22 @@ static void on_process(void *userdata, struct spa_io_position *position)
struct spa_data* d = &buf->datas[0];
if (d->data) {
struct spa_pod * pod =
spa_pod_from_data(
d->data,
d->maxsize,
d->chunk->offset,
d->chunk->size
);
struct spa_pod* pod = spa_pod_from_data(d->data, d->maxsize,
d->chunk->offset, d->chunk->size);
if (pod) {
if (spa_pod_is_sequence(pod)) {
struct spa_pod_sequence* pod_seq = (struct spa_pod_sequence*)pod;
struct spa_pod_control* c;
SPA_POD_SEQUENCE_FOREACH(pod_seq, c) {
SPA_POD_SEQUENCE_FOREACH(pod_seq, c)
{
if (c->type == SPA_CONTROL_Midi) {
unsigned sec =
(frame + c->offset)
/ (float) position->clock.rate.denom;
unsigned sec = (frame + c->offset) / (float)position->clock.rate.denom;
char* midi_data = SPA_POD_BODY(&c->value);
unsigned size = SPA_POD_BODY_SIZE(&c->value);
printf("[%d] MIDI message (%d bytes) : %x, %x, %x\n", sec, size, midi_data[0], midi_data[1], midi_data[2]);
printf("[%d] MIDI message (%d bytes) : %x, %x, %x\n", sec, size,
midi_data[0], midi_data[1], midi_data[2]);
switch (midi_data[0] & 0xff) {
case 0xb0:
@ -109,7 +104,8 @@ static void on_process(void *userdata, struct spa_io_position *position)
if (data->prog == 2) {
if (midi_data[2] >= 64) {
data->gate.threshold = data->gate.cur_block_sum * 0.8;
printf("calibrate noise gate: threshold = %f\n", data->gate.threshold);
printf("calibrate noise gate: threshold = %f\n",
data->gate.threshold);
}
}
@ -135,7 +131,6 @@ static void on_process(void *userdata, struct spa_io_position *position)
delay_set_time(&data->delay, duration);
}
sust_resize(&data->sust, duration);
}
@ -164,7 +159,8 @@ static void on_process(void *userdata, struct spa_io_position *position)
}
}
} else {
fprintf(stderr, "on_process(): unexpected POD that is not a sequence (midi_in_port)\n");
fprintf(stderr, "on_process(): unexpected POD that is not a sequence "
"(midi_in_port)\n");
}
} else {
fprintf(stderr, "on_process(): pod is NULL\n");
@ -175,7 +171,6 @@ static void on_process(void *userdata, struct spa_io_position *position)
pw_filter_queue_buffer(data->midi_in_port, b);
float* const in = pw_filter_get_dsp_buffer(data->guit_in_port, n_samples);
float tmp1[n_samples];
float tmp2[n_samples];
@ -200,7 +195,9 @@ static void do_quit(void *userdata, int signal_number)
int main(int argc, char* argv[])
{
struct data data = { 0, };
struct data data = {
0,
};
gate_init(&data.gate);
delay_init(&data.delay);
@ -219,57 +216,36 @@ int main(int argc, char *argv[])
pw_loop_add_signal(pw_main_loop_get_loop(data.loop), SIGTERM, do_quit, &data);
data.filter = pw_filter_new_simple(
pw_main_loop_get_loop(data.loop),
"Guitar FX",
pw_properties_new(
PW_KEY_MEDIA_TYPE, "Audio",
PW_KEY_MEDIA_CATEGORY, "Filter",
PW_KEY_MEDIA_ROLE, "DSP",
NULL),
&filter_events,
&data);
pw_main_loop_get_loop(data.loop), "Guitar FX",
pw_properties_new(PW_KEY_MEDIA_TYPE, "Audio", PW_KEY_MEDIA_CATEGORY,
"Filter", PW_KEY_MEDIA_ROLE, "DSP", NULL),
&filter_events, &data);
data.midi_in_port = pw_filter_add_port(data.filter,
PW_DIRECTION_INPUT,
PW_FILTER_PORT_FLAG_MAP_BUFFERS,
sizeof(struct port),
pw_properties_new(
PW_KEY_FORMAT_DSP, "8 bit raw midi",
PW_KEY_PORT_NAME, "midi in",
NULL
),
NULL, 0
);
data.guit_in_port = pw_filter_add_port(data.filter,
PW_DIRECTION_INPUT,
PW_FILTER_PORT_FLAG_MAP_BUFFERS,
sizeof(struct port),
pw_properties_new(
PW_KEY_FORMAT_DSP, "32 bit float mono audio",
PW_KEY_PORT_NAME, "guitar in",
NULL),
data.midi_in_port = pw_filter_add_port(data.filter, PW_DIRECTION_INPUT,
PW_FILTER_PORT_FLAG_MAP_BUFFERS, sizeof(struct port),
pw_properties_new(PW_KEY_FORMAT_DSP, "8 bit raw midi",
PW_KEY_PORT_NAME, "midi in", NULL),
NULL, 0);
data.out_port = pw_filter_add_port(data.filter,
PW_DIRECTION_OUTPUT,
PW_FILTER_PORT_FLAG_MAP_BUFFERS,
data.guit_in_port = pw_filter_add_port(
data.filter, PW_DIRECTION_INPUT, PW_FILTER_PORT_FLAG_MAP_BUFFERS,
sizeof(struct port),
pw_properties_new(
PW_KEY_FORMAT_DSP, "32 bit float mono audio",
PW_KEY_PORT_NAME, "fx out",
NULL),
pw_properties_new(PW_KEY_FORMAT_DSP, "32 bit float mono audio",
PW_KEY_PORT_NAME, "guitar in", NULL),
NULL, 0);
params[0] = spa_process_latency_build(&b,
SPA_PARAM_ProcessLatency,
&SPA_PROCESS_LATENCY_INFO_INIT(
.ns = 10 * SPA_NSEC_PER_MSEC
));
data.out_port = pw_filter_add_port(
data.filter, PW_DIRECTION_OUTPUT, PW_FILTER_PORT_FLAG_MAP_BUFFERS,
sizeof(struct port),
pw_properties_new(PW_KEY_FORMAT_DSP, "32 bit float mono audio",
PW_KEY_PORT_NAME, "fx out", NULL),
NULL, 0);
if (pw_filter_connect(data.filter,
PW_FILTER_FLAG_RT_PROCESS,
params, 1) < 0) {
params[0] = spa_process_latency_build(
&b, SPA_PARAM_ProcessLatency,
&SPA_PROCESS_LATENCY_INFO_INIT(.ns = 10 * SPA_NSEC_PER_MSEC));
if (pw_filter_connect(data.filter, PW_FILTER_FLAG_RT_PROCESS, params, 1) < 0) {
fprintf(stderr, "can't connect\n");
return -1;
}

22
sust.c
View file

@ -1,9 +1,10 @@
#include "sust.h"
#include <math.h>
#include <stdlib.h>
#include <stdio.h>
#include <stdlib.h>
void sust_init( struct sust * sust ) {
void sust_init(struct sust* sust)
{
sust->mode = MODE_Sostenuto;
sust->playing = false;
@ -16,7 +17,8 @@ void sust_init( struct sust * sust ) {
sust->play_buf = malloc(sizeof(float) * sust->buf_len);
}
float envelope( float x ) {
float envelope(float x)
{
if (x < 0.4)
return (x / 0.4) * (x / 0.4);
if (x < 0.6)
@ -26,11 +28,13 @@ float envelope( float x ) {
return v * v;
}
float softcos( float x ) {
float softcos(float x)
{
return sin(x * (3.141 / 2.0));
}
void sust_resize( struct sust * sust, size_t new_len ) {
void sust_resize(struct sust* sust, size_t new_len)
{
sust->buf_len = new_len;
sust->play_buf = realloc(sust->play_buf, sizeof(float) * new_len);
sust->record_buf = realloc(sust->record_buf, sizeof(float) * new_len);
@ -38,8 +42,8 @@ void sust_resize( struct sust * sust, size_t new_len ) {
}
void sust_swap(
struct sust * sust
) {
struct sust* sust)
{
float* tmp = sust->play_buf;
sust->play_buf = sust->record_buf;
sust->record_buf = tmp;
@ -53,8 +57,8 @@ void sust_process(
struct sust* sust,
size_t frame_size,
float const* in,
float * out
) {
float* out)
{
for (size_t i = 0; i < frame_size; ++i) {
if (sust->mode == MODE_Sustain && sust->idx == 0) {

4
sust.h
View file

@ -19,7 +19,6 @@ struct sust {
float* play_buf;
};
void sust_init(struct sust* sust);
void sust_resize(struct sust* sust, size_t new_len);
void sust_swap(struct sust* sust);
@ -28,5 +27,4 @@ void sust_process(
struct sust* sust,
size_t frame_size,
float const* in,
float * out
);
float* out);