Compare commits
5 commits
e36a4635e8
...
765275ac32
Author | SHA1 | Date | |
---|---|---|---|
765275ac32 | |||
752155de32 | |||
a6970aeed3 | |||
62acece204 | |||
ce2212708a |
11 changed files with 388 additions and 358 deletions
2
.gitignore
vendored
Normal file
2
.gitignore
vendored
Normal file
|
@ -0,0 +1,2 @@
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|||
build
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*~
|
110
controller.c
Normal file
110
controller.c
Normal file
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@ -0,0 +1,110 @@
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#include "pipewire/keys.h"
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#include "pipewire/port.h"
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#include "spa/pod/iter.h"
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#include "spa/utils/defs.h"
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#include <signal.h>
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#include <stdio.h>
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#include <spa/control/control.h>
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#include <spa/param/latency-utils.h>
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#include <spa/pod/builder.h>
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#include <spa/pod/pod.h>
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#include <pipewire/filter.h>
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#include <pipewire/pipewire.h>
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#include "guitfx.h"
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#include "delay.h"
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#include "sust.h"
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#include "gate.h"
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void midi_control(
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struct FxData * data,
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uint64_t frame,
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uint64_t offset,
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unsigned sec,
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unsigned midi_size,
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uint8_t * midi_data,
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struct spa_io_position* position
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) {
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printf("[%d] MIDI message (%d bytes) : %x, %x, %x\n", sec, midi_size,
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midi_data[0], midi_data[1], midi_data[2]);
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switch (midi_data[0] & 0xff) {
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case 0xb0:
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switch (midi_data[1]) {
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case 0x0b:
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// expr pedal
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float val_f = ((float)midi_data[2]) / 128.0;
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float thres = 0.5;
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if (val_f > thres) {
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float expr_mix = (val_f - thres) / (1.0 - thres);
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printf("Expr Pedal %f\n", expr_mix);
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data->delay.mix = expr_mix;
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} else {
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data->delay.mix = 0.0;
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}
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break;
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case 0x42:
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// noise gate calibration
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if (data->prog == 2) {
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if (midi_data[2] >= 64) {
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data->gate.threshold = data->gate.cur_block_sum * 0.8;
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printf("calibrate noise gate: threshold = %f\n",
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data->gate.threshold);
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}
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}
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// sust pedal
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if (data->prog == 1) {
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if (midi_data[2] >= 64) {
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sust_swap(&data->sust);
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data->sust.playing = true;
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data->sust.start_idx = data->sust.idx;
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data->sust.idx = 0;
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} else {
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data->sust.playing = false;
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}
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}
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// tap tempo
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if (data->prog == 0) {
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uint64_t cur_tap = frame + offset;
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uint64_t duration = cur_tap - data->last_tap;
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data->last_tap = cur_tap;
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if (duration < (4 * position->clock.rate.denom)) {
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delay_set_time(&data->delay, duration);
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}
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sust_resize(&data->sust, duration);
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}
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break;
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}
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break;
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case 0xc0:
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// program change
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if (midi_data[2] >= 64) {
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sust_swap(&data->sust);
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data->sust.playing = true;
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data->sust.start_idx = data->sust.idx;
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data->sust.idx = 0;
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} else {
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data->sust.playing = false;
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}
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printf("program change: %u\n", midi_data[1]);
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data->prog = midi_data[1];
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break;
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}
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}
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23
delay.c
23
delay.c
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@ -1,12 +1,12 @@
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#include <stdint.h>
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#include <stddef.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include "delay.h"
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#include <stddef.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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void delay_init(
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struct delay * delay
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) {
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struct delay* delay)
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{
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delay->mix = 0.8;
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delay->feedback = 0.8;
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delay->duration = 0;
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@ -17,8 +17,8 @@ void delay_init(
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void delay_set_time(
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struct delay* delay,
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uint64_t new_duration
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) {
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uint64_t new_duration)
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{
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printf("set delay duration to %lu samples\n", new_duration);
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if (new_duration > delay->buf_capacity) {
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delay->buf_capacity = new_duration;
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@ -39,12 +39,11 @@ void delay_process(
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struct delay* delay,
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size_t frame_size,
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float const* in,
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float * out
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) {
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float* out)
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{
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for (size_t i = 0; i < frame_size; ++i) {
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if (delay->duration > 0) {
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out[i] =
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in[i]
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out[i] = in[i]
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+ delay->mix * delay->buf[delay->buf_idx];
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delay->buf[delay->buf_idx] *= delay->feedback;
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11
delay.h
11
delay.h
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@ -1,7 +1,7 @@
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#pragma once
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#include <stdint.h>
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#include <stddef.h>
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#include <stdint.h>
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struct delay {
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uint64_t duration;
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@ -14,17 +14,14 @@ struct delay {
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};
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void delay_init(
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struct delay * delay
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);
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struct delay* delay);
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void delay_set_time(
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struct delay* delay,
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uint64_t new_duration
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);
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uint64_t new_duration);
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void delay_process(
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struct delay* delay,
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size_t frame_size,
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float const* in,
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float * out
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);
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float* out);
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20
gate.c
20
gate.c
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@ -1,13 +1,13 @@
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#include <stdint.h>
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#include <stddef.h>
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#include <stdlib.h>
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#include <stdio.h>
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#include "gate.h"
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#include <math.h>
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#include <stddef.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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void gate_init(
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struct gate * gate
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) {
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struct gate* gate)
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{
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gate->threshold = 0.0;
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gate->enable_calibration = false;
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@ -17,16 +17,16 @@ void gate_init(
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gate->is_active = false;
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gate->cur_gain = 1.0;
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gate->attack = 1.0 / 512.0;
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gate->release = 1.0 / 4096.0;
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gate->attack = 1.0 / 128.0;
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gate->release = 1.0 / 8192.0;
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}
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void gate_process(
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struct gate* gate,
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size_t frame_size,
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float const* in,
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float * out
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) {
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float* out)
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{
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bool act = false;
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7
gate.h
7
gate.h
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@ -1,8 +1,8 @@
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#pragma once
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#include <stdint.h>
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#include <stddef.h>
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#include <stdbool.h>
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#include <stddef.h>
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#include <stdint.h>
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struct gate {
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float threshold;
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@ -25,5 +25,4 @@ void gate_process(
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struct gate* gate,
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size_t frame_size,
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float const* in,
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float * out
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);
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float* out);
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|
|
220
guitfx.c
220
guitfx.c
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@ -2,20 +2,21 @@
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#include "pipewire/port.h"
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#include "spa/pod/iter.h"
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#include "spa/utils/defs.h"
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#include <stdio.h>
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#include <signal.h>
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#include <stdio.h>
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#include <spa/pod/pod.h>
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#include <spa/pod/builder.h>
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#include <spa/control/control.h>
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#include <spa/param/latency-utils.h>
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#include <spa/pod/builder.h>
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#include <spa/pod/pod.h>
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#include <pipewire/pipewire.h>
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#include <pipewire/filter.h>
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#include <pipewire/pipewire.h>
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#include "delay.h"
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#include "sust.h"
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#include "gate.h"
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#include "sust.h"
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#include "guitfx.h"
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float envelope(float x);
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@ -25,23 +26,24 @@ struct port {
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struct data* data;
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};
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void midi_control(
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struct FxData * data,
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uint64_t frame,
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uint64_t offset,
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unsigned sec,
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unsigned midi_size,
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uint8_t * midi_data,
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struct spa_io_position* position);
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struct data {
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struct pw_main_loop* loop;
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struct pw_filter* filter;
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struct port* guit_in_port;
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struct port* midi_in_port;
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struct port* out_port;
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//! effect data
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uint64_t last_tap;
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struct delay delay;
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struct sust sust;
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struct gate gate;
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unsigned prog;
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//! elapsed time in number of samples
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uint64_t time;
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struct FxData fx_data;
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};
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static void on_process(void* userdata, struct spa_io_position* position)
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|
@ -49,8 +51,8 @@ static void on_process(void *userdata, struct spa_io_position *position)
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struct data* data = userdata;
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uint32_t n_samples = position->clock.duration;
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uint64_t frame = data->time;
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data->time += n_samples;
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uint64_t frame = data->fx_data.time;
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data->fx_data.time += n_samples;
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struct pw_buffer* b = pw_filter_dequeue_buffer(data->midi_in_port);
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if (b == NULL) {
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|
@ -63,107 +65,29 @@ static void on_process(void *userdata, struct spa_io_position *position)
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struct spa_data* d = &buf->datas[0];
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if (d->data) {
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struct spa_pod * pod =
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spa_pod_from_data(
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d->data,
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d->maxsize,
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d->chunk->offset,
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d->chunk->size
|
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);
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struct spa_pod* pod = spa_pod_from_data(d->data, d->maxsize,
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d->chunk->offset, d->chunk->size);
|
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|
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if (pod) {
|
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if (spa_pod_is_sequence(pod)) {
|
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struct spa_pod_sequence* pod_seq = (struct spa_pod_sequence*)pod;
|
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struct spa_pod_control* c;
|
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SPA_POD_SEQUENCE_FOREACH(pod_seq, c) {
|
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SPA_POD_SEQUENCE_FOREACH(pod_seq, c)
|
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{
|
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if (c->type == SPA_CONTROL_Midi) {
|
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unsigned sec =
|
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(frame + c->offset)
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/ (float) position->clock.rate.denom;
|
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unsigned sec = (frame + c->offset) / (float)position->clock.rate.denom;
|
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char* midi_data = SPA_POD_BODY(&c->value);
|
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unsigned size = SPA_POD_BODY_SIZE(&c->value);
|
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unsigned midi_size = SPA_POD_BODY_SIZE(&c->value);
|
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|
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printf("[%d] MIDI message (%d bytes) : %x, %x, %x\n", sec, size, midi_data[0], midi_data[1], midi_data[2]);
|
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|
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switch( midi_data[0] & 0xff ) {
|
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case 0xb0:
|
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switch( midi_data[1] ) {
|
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case 0x0b:
|
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// expr pedal
|
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float val_f = ((float)midi_data[2]) / 128.0;
|
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|
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float thres = 0.4;
|
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|
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if ( val_f > thres ) {
|
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printf("Expr Pedal %f\n", val_f);
|
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data->delay.mix = (val_f - thres) / (1.0-thres);
|
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midi_control( &data->fx_data, frame, c->offset, sec, midi_size, midi_data, position );
|
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} else {
|
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data->delay.mix = 0.0;
|
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}
|
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break;
|
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|
||||
case 0x42:
|
||||
|
||||
// noise gate calibration
|
||||
if( data->prog == 2 ) {
|
||||
if( midi_data[2] >= 64) {
|
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data->gate.threshold = data->gate.cur_block_sum * 0.8;
|
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printf("calibrate noise gate: threshold = %f\n", data->gate.threshold);
|
||||
}
|
||||
}
|
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|
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// sust pedal
|
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if( data->prog == 1 ) {
|
||||
if( midi_data[2] >= 64) {
|
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sust_swap( &data->sust );
|
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data->sust.playing = true;
|
||||
|
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data->sust.start_idx = data->sust.idx;
|
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data->sust.idx = 0;
|
||||
} else {
|
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data->sust.playing = false;
|
||||
}
|
||||
}
|
||||
|
||||
// tap tempo
|
||||
if( data->prog == 0 ) {
|
||||
uint64_t cur_tap = frame + c->offset;
|
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uint64_t duration = cur_tap - data->last_tap;
|
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data->last_tap = cur_tap;
|
||||
if( duration < (4*position->clock.rate.denom) ) {
|
||||
delay_set_time( &data->delay, duration );
|
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}
|
||||
|
||||
|
||||
sust_resize( &data->sust, duration );
|
||||
}
|
||||
|
||||
break;
|
||||
}
|
||||
|
||||
break;
|
||||
|
||||
case 0xc0:
|
||||
// program change
|
||||
if( midi_data[2] >= 64) {
|
||||
sust_swap( &data->sust );
|
||||
data->sust.playing = true;
|
||||
|
||||
data->sust.start_idx = data->sust.idx;
|
||||
data->sust.idx = 0;
|
||||
} else {
|
||||
data->sust.playing = false;
|
||||
}
|
||||
printf("program change: %u\n", midi_data[1]);
|
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data->prog = midi_data[1];
|
||||
break;
|
||||
}
|
||||
} else {
|
||||
printf("on_process(): non midi-control\n");
|
||||
}
|
||||
}
|
||||
} else {
|
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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 "
|
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"(midi_in_port)\n");
|
||||
}
|
||||
} else {
|
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fprintf(stderr, "on_process(): pod is NULL\n");
|
||||
|
@ -174,15 +98,14 @@ 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];
|
||||
float* out = pw_filter_get_dsp_buffer(data->out_port, n_samples);
|
||||
if (in && out) {
|
||||
gate_process( &data->gate, n_samples, in, tmp1 );
|
||||
sust_process( &data->sust, n_samples, tmp1, tmp2 );
|
||||
delay_process( &data->delay, n_samples, tmp2, out );
|
||||
gate_process(&data->fx_data.gate, n_samples, in, tmp1);
|
||||
sust_process(&data->fx_data.sust, n_samples, tmp1, tmp2);
|
||||
delay_process(&data->fx_data.delay, n_samples, tmp2, out);
|
||||
}
|
||||
}
|
||||
|
||||
|
@ -199,12 +122,14 @@ 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 );
|
||||
sust_init( &data.sust );
|
||||
data.prog = 0;
|
||||
gate_init(&data.fx_data.gate);
|
||||
delay_init(&data.fx_data.delay);
|
||||
sust_init(&data.fx_data.sust);
|
||||
data.fx_data.prog = 0;
|
||||
|
||||
const struct spa_pod* params[1];
|
||||
uint8_t buffer[1024];
|
||||
|
@ -218,57 +143,36 @@ 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;
|
||||
}
|
||||
|
|
16
guitfx.h
Normal file
16
guitfx.h
Normal file
|
@ -0,0 +1,16 @@
|
|||
|
||||
#include "delay.h"
|
||||
#include "sust.h"
|
||||
#include "gate.h"
|
||||
|
||||
struct FxData {
|
||||
uint64_t last_tap;
|
||||
struct delay delay;
|
||||
struct sust sust;
|
||||
struct gate gate;
|
||||
|
||||
unsigned prog;
|
||||
|
||||
//! elapsed time in number of samples
|
||||
uint64_t time;
|
||||
};
|
|
@ -10,5 +10,6 @@ executable(
|
|||
'delay.c',
|
||||
'sust.c',
|
||||
'gate.c',
|
||||
'controller.c',
|
||||
dependencies : [pipewire_dep, m_dep],
|
||||
)
|
||||
|
|
22
sust.c
22
sust.c
|
@ -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
4
sust.h
|
@ -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);
|
||||
|
|
Loading…
Add table
Add a link
Reference in a new issue