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midi_tasks.c
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midi_tasks.c
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/* Copyright 2020-2021 Dustin DeWeese
This file is part of MidiPush.
MidiPush is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
MidiPush is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with MidiPush. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef DTASK_GEN
#include "types.h"
#include <sys/time.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <stdarg.h>
#include <limits.h>
#include "startle/types.h"
#include "startle/macros.h"
#include "startle/map.h"
#include "startle/support.h"
#include "midipush.h"
#include "vec128b.h"
#include "midi_tasks.h"
#endif
#define PAD_RED 5
#define PAD_YELLOW 13
#define PAD_GREEN 21
#define PAD_PURPLE 53
#define DEBOUNCE_MS 100
#define MOD_INC(x, m, n) ((x + n) % m)
#define MOD_DEC(x, m, n) ((x + m - n) % m)
#define MOD_OFFSET(x, m, n) ((x + m + n) % m)
enum infer_scale_mode {
INFER_SCALE_OFF = 0,
INFER_SCALE_ON,
INFER_SCALE_LOCK,
INFER_SCALE_MAX
};
static_assert(MIDI_TASKS_COUNT <= 64, "too many tasks");
DTASK_GROUP(midi_tasks)
// passthrough
DTASK(midi_in, struct { int id; unsigned char status; seg_t data; }) {
return true;
}
DTASK(time_of_day, struct timeval) {
return true;
}
DTASK(tick, long long) {
timeval_t tv = *DREF(time_of_day);
long long ms = tv.tv_sec * 1000ull + tv.tv_usec / 1000ull;
if(ms < *DREF(tick) ||
ms - *DREF(tick) > 60000 / (*DREF(bpm) * BEATS_PER_PAGE)) {
*DREF(tick) = ms;
return true;
} else {
return false;
}
}
DTASK(external_tick, bool) {
return true;
}
unsigned int page_beat(unsigned int b, const set_page_t *p) {
unsigned int current_page = b / BEATS_PER_PAGE;
return ((current_page & p->keep) | p->val) * BEATS_PER_PAGE;
}
DTASK(beat, struct { unsigned int then, now; }) {
DREF(beat)->then = DREF(beat)->now;
if((state->events & (TICK | EXTERNAL_TICK)) && *DREF(playing)) {
(void)DREF(tick);
(void)DREF(external_tick);
DREF(beat)->now = MOD_INC(DREF(beat)->then, BEATS, 1);
if(!(DREF(beat)->now % BEATS_PER_PAGE)) { // next page
int last_page = DREF(beat)->then / BEATS_PER_PAGE;
int next_page = inc_mask(last_page, *DREF(page_mask)) % PAGES;
if(MOD_INC(last_page, PAGES, 1) != next_page) {
DREF(beat)->then = DREF(beat)->now = next_page * BEATS_PER_PAGE;
}
}
}
if(state->events & SHUTTLE) {
DREF(beat)->now = MOD_OFFSET(DREF(beat)->then, BEATS, *DREF(shuttle) * BEATS_PER_PAGE / 4);
}
if((state->events & SET_PAGE) && DREF(set_page)->note == -1 && DREF(set_page)->keep != 0xff) {
DREF(beat)->now = page_beat(DREF(beat)->then, DREF(set_page));
}
return true;
}
DTASK(print_midi_msg, bool) {
const midi_in_t *msg = DREF(midi_in);
if(msg->status != 0xf8) {
printf("%d > 0x%x:", msg->id, msg->status);
COUNTUP(i, msg->data.n) {
printf(" %d", (unsigned char)msg->data.s[i]);
}
printf("\n");
}
return true;
}
void set_bit(uint64_t *s, int k, bool v) {
if(v) {
*s |= 1ull << k;
} else {
*s &= ~(1ull << k);
}
}
DTASK(pad, key_event_t) {
const midi_in_t *msg = DREF(midi_in);
if(msg->id != 0) return false;
unsigned char control = msg->status & 0xf0;
if(ONEOF(control, 0x80, 0x90)) {
int p = msg->data.s[0] - 36;
if(INRANGE(p, 0, 63)) {
*DREF(pad) = (key_event_t) {
.id = p,
.velocity = (control == 0x90 ? 1 : -1) * (int16_t)msg->data.s[1]
};
return true;
}
}
return false;
}
DTASK(external_key, key_event_t) {
const midi_in_t *msg = DREF(midi_in);
if(msg->id == 0) return false;
unsigned char control = msg->status & 0xf0;
if(ONEOF(control, 0x80, 0x90)) {
*DREF(external_key) = (external_key_t) {
.id = msg->data.s[0],
.velocity = (control == 0x90 ? 1 : -1) * (int16_t)msg->data.s[1]
};
return true;
}
return false;
}
DTASK(channel_pressure, int) {
const midi_in_t *msg = DREF(midi_in);
if(msg->id != 0) return false;
unsigned char control = msg->status & 0xf0;
if(control == 0xd0) {
*DREF(channel_pressure) = msg->data.s[0];
return true;
}
return false;
}
DTASK(pitch_bend, int) {
const midi_in_t *msg = DREF(midi_in);
if(msg->id != 0) return false;
unsigned char control = msg->status & 0xf0;
if(control == 0xe0) {
*DREF(pitch_bend) = (msg->data.s[0] & 0x7f) | (((int)msg->data.s[1] & 0x7f) << 7) ;
return true;
}
return false;
}
DTASK(control_change, struct { int control, value; } ) {
const midi_in_t *msg = DREF(midi_in);
if(msg->id != 0) return false;
unsigned char control = msg->status & 0xf0;
if(control == 0xb0) {
DREF(control_change)->control = msg->data.s[0];
DREF(control_change)->value = msg->data.s[1];
return true;
}
return false;
}
DTASK(pads, uint64_t) {
const pad_t *pad = DREF(pad);
uint64_t prev = *DREF(pads);
if(*DREF(new_button)) {
*DREF(pads) = 0;
} else {
set_bit(DREF(pads), pad->id, pad->velocity > 0);
}
return *DREF(pads) != prev;
}
DTASK_ENABLE(current_note) {
key_event_t empty = { -1, 0 };
DELAY_FILL(DREF(current_note), key_event_t, HISTORY, &empty);
}
DTASK(current_note, DELAY(key_event_t, HISTORY)) {
if(state->events & PAD) {
const key_event_t *pad = DREF(pad);
int id = pad_to_note(pad->id) + *DREF(transpose);
if(INRANGE(id, 0, 127)) {
key_event_t e = {
.id = pad_to_note(pad->id) + *DREF(transpose),
.velocity = pad->velocity,
.tick = *DREF_PASS(tick)
};
// pseudo debounce - pads can bounce with lesser velocity cancelling the previous note,
// so this takes the maximum of the two (assuming only two note ons)
const key_event_t *prev = DELAY_READ(DREF(current_note), key_event_t, HISTORY, 1);
if(e.velocity > 0 &&
prev->id == e.id &&
e.tick < prev->tick + DEBOUNCE_MS) {
e.velocity = max(e.velocity, prev->velocity);
}
DELAY_WRITE(DREF(current_note), key_event_t, HISTORY, &e);
return true;
}
}
if(state->events & EXTERNAL_KEY) {
const key_event_t *key = DREF(external_key);
key_event_t e = {
.id = key->id,
.velocity = key->velocity,
.tick = *DREF_PASS(tick)
};
DELAY_WRITE(DREF(current_note), key_event_t, HISTORY, &e);
return true;
}
return false;
}
DTASK_ENABLE(notes) {
vec128b_set_zero(&DREF(notes)->v);
DREF(notes)->cnt = 0;
}
DTASK(notes, struct { vec128b v; int cnt; }) {
(void)DREF(transpose);
bool changed = false;
const key_event_t *note = DELAY_READ(DREF(current_note), key_event_t, HISTORY, 0);
vec128b prev = DREF(notes)->v;
if(state->events & TRANSPOSE) {
vec128b_set_zero(&DREF(notes)->v);
} else {
vec128b_set_bit_val(&DREF(notes)->v, note->id, note->velocity > 0);
}
if(!vec128b_eq(&DREF(notes)->v, &prev)) {
DREF(notes)->cnt += note->velocity > 0 ? 1 : -1;
changed = true;
}
if(vec128b_zero(&DREF(notes)->v)) {
DREF(notes)->cnt = 0;
}
return changed;
}
DTASK_ENABLE(deleting) {
send_msg(0xb0, 118, 1);
*DREF(deleting) = false;
}
DTASK(deleting, bool) {
const control_change_t *cc = DREF(control_change);
if(cc->control == 118 && cc->value) {
*DREF(deleting) = !*DREF(deleting);
send_msg(0xb0, 118, *DREF(deleting) ? 2 : 1);
return true;
}
// automatically disable after new
if((state->events & NEW_BUTTON) && !*DREF(new_button)) {
*DREF(deleting) = false;
send_msg(0xb0, 118, 1);
}
return false;
}
DTASK_ENABLE(bpm) {
*DREF(bpm) = 60;
printf_text(0, 3, "bpm: %3d", *DREF(bpm));
}
DTASK(bpm, int) {
const control_change_t *cc = DREF(control_change);
if(cc->control == 14) {
int val = cc->value;
if(val >= 64) val = val - 128;
*DREF(bpm) = clamp(30, 240, *DREF(bpm) + val * 5);
printf_text(0, 3, "bpm: %3d", *DREF(bpm));
return true;
}
return false;
}
typedef union {
char byte[sizeof(uintptr_t)];
uintptr_t data;
} msg_data_t;
DTASK_ENABLE(record) {
record_t *record = DREF(record);
record->copy.shift = -1;
record->copy.first_note = -1;
record->copy.first_beat = -1;
}
static
void delete_notes(record_t *record, unsigned int beat, unsigned int channel, const vec128b *notes) {
vec128b_and_not(&record->notes[beat][channel], notes);
map_iterator it = map_iterator_begin(record->events, beat);
pair_t *p = map_find_iter(&it);
while(p) {
msg_data_t msg = { .data = p->second };
if(msg.byte[0] == (0x90 | channel) &&
vec128b_bit_is_set(notes, msg.byte[1])) {
p->second = 0;
}
p = map_next(&it, p);
}
}
// TODO this is too long
DTASK(record, struct { map_t events; vec128b notes[BEATS][16]; struct { int shift, first_beat, first_note; } copy; vec128b extra[16]; unsigned int active; }) {
unsigned int beat = DREF_PASS(beat)->then;
int channel = *DREF_PASS(channel);
record_t *record = DREF(record);
memset(record->extra, 0, sizeof(record->extra));
if(state->events & SET_PAGE) {
if(DREF(set_page)->note >= 0) {
if(record->copy.first_beat < 0) {
int start = page_beat(beat, DREF(set_page));
COUNTUP(i, BEATS) {
COUNTUP(c, 16) {
if(!vec128b_zero(&record->notes[start][c])) {
goto found_start;
}
}
start = MOD_INC(start, BEATS, 1);
}
found_start:
record->copy.first_beat = start;
}
record->copy.shift = MOD_DEC(beat, BEATS, record->copy.first_beat - 1);
} else {
record->copy.shift = -1;
record->copy.first_note = -1;
record->copy.first_beat = -1;
}
return true;
}
if(*DREF(new_button)) {
if(*DREF(deleting)) {
map_clear(record->events);
memset(record->notes, 0, sizeof(record->notes));
record->active = 0;
} else {
FORMAP(i, record->events) {
pair_t *p = &record->events[i];
msg_data_t msg = { .data = p->second };
if((msg.byte[0] & 0xf) == channel) {
p->second = 0;
}
}
map_filter(record->events, nonzero_value);
COUNTUP(i, BEATS) {
vec128b_set_zero(&record->notes[i][channel]);
}
record->active &= ~(1 << channel);
}
return true;
}
int start = DREF(beat)->then, stop = DREF(beat)->now;
if((stop - start + BEATS) % BEATS > BEATS / 2) {
int tmp = start;
start = stop;
stop = tmp;
}
if(*DREF(deleting) &&
DREF(notes)->cnt != 0) {
// clear the tails from notes that will be deleted
vec128b clear = DREF(notes)->v;
vec128b_and(&clear, &record->notes[MOD_DEC(stop, BEATS, 1)][channel]);
for(int i = stop;
!vec128b_zero(&clear);
i = MOD_INC(i, BEATS, 1)) {
vec128b_and(&clear, &record->notes[i][channel]);
vec128b_and_not(&record->notes[i][channel], &clear);
}
// clear the heads from notes that will be deleted
clear = DREF(notes)->v;
vec128b_and(&clear, &record->notes[start][channel]);
for(int i = MOD_DEC(start, BEATS, 1);
!vec128b_zero(&clear);
i = MOD_DEC(i, BEATS, 1)) {
vec128b_and(&clear, &record->notes[i][channel]);
delete_notes(record, i, channel, &clear);
}
// delete the notes inside the period
for(int i = start; i != stop; i = MOD_INC(i, BEATS, 1)) {
delete_notes(record, i, channel, &DREF(notes)->v);
}
return true;
}
if(state->events & DELETING) {
// delete disabled, so collect garbage
map_filter(record->events, nonzero_value);
}
// copy
if(record->copy.shift >= 0) {
unsigned int disable = *DREF_PASS(disable_channel);
bool change = false;
// copy ahead one beat for playback
start = MOD_INC(start, BEATS, 1);
stop = MOD_INC(stop, BEATS, 1);
for(int i = start; i != stop; i = MOD_INC(i, BEATS, 1)) {
int src = MOD_DEC(i, BEATS, record->copy.shift);
// events
map_iterator it = map_iterator_begin(record->events, src);
pair_t *p = map_find_iter(&it);
while(p) {
msg_data_t msg = { .data = p->second };
if(record->copy.first_note < 0) {
if((msg.byte[0] & 0xf0) == 0x90) {
record->copy.first_note = (int)msg.byte[1];
}
} else {
int c = msg.byte[0] & 0x0f;
if(!(disable & 1 << c)) {
if((msg.byte[0] & 0xf0) == 0x90) {
int transpose = DREF(set_page)->note - record->copy.first_note;
int n = msg.byte[1] + transpose;
if(INRANGE(n, 0, 127)) { // transpose notes
msg.byte[1] = n;
if(*DREF(recording) && !vec128b_bit_is_set(&record->notes[i][c], n)) {
map_insert(record->events, PAIR(i, msg.data));
} else {
synth_note(c, n, true, msg.byte[2]);
}
}
} else {
if(*DREF(recording)) {
map_insert(record->events, PAIR(i, msg.data));
} else {
int n = min(sizeof(msg.byte), fixed_length(msg.byte[0]));
write_synth((seg_t) { .n = n, .s = msg.byte });
}
}
change = true;
}
}
p = map_next(&it, p);
}
// notes
if(record->copy.first_note >= 0) {
int transpose = DREF(set_page)->note - record->copy.first_note;
COUNTUP(c, 16) {
if(!(disable & 1 << c)) {
vec128b src_notes = record->notes[src][c];
if(transpose >= 0) {
vec128b_shiftl(&src_notes, transpose);
} else {
vec128b_shiftr(&src_notes, -transpose);
}
//if(~record->notes[i][c] & src_notes) change = true;
if(!vec128b_zero(&src_notes)) change = true; // *** ^
if(*DREF(recording)) {
vec128b_or(&record->notes[i][c], &src_notes);
}
vec128b_or(&record->extra[c], &src_notes);
}
}
}
}
return change;
}
if(*DREF(recording)) {
bool change = false;
// events
if(state->events & CURRENT_NOTE) {
const key_event_t *note = DELAY_READ(DREF(current_note), key_event_t, HISTORY, 0);
if(note->velocity > 0 &&
!vec128b_bit_is_set(&record->notes[beat][channel], note->id) &&
(*DREF_PASS(infer_scale_mode) != INFER_SCALE_LOCK ||
in_key(*DREF_PASS(infer_scale), note->id))) {
msg_data_t msg = {{
0x90 | channel,
note->id,
note->velocity
}};
map_insert(record->events, PAIR(beat, msg.data));
change = true;
}
}
if(state->events & CHANNEL_PRESSURE) {
msg_data_t msg = {{
0xd0 | channel,
*DREF(channel_pressure)
}};
map_insert(record->events, PAIR(beat, msg.data));
change = true;
}
if(state->events & PITCH_BEND) {
msg_data_t msg = {{
0xe0 | channel,
*DREF(pitch_bend) & 0x7f,
(*DREF(pitch_bend) >> 7) & 0x7f
}};
map_insert(record->events, PAIR(beat, msg.data));
change = true;
}
// notes
int i = start;
while(i != stop) {
vec128b_or(&record->notes[i][channel], &DREF(notes)->v);
i = MOD_INC(i, BEATS, 1);
}
// mark the channel active
if(change) record->active |= 1 << channel;
return change;
}
return false;
}
DTASK(passthrough, bool) {
if(*DREF_PASS(deleting) ||
DREF_PASS(set_page)->note >= 0) {
return false;
}
int channel = *DREF_PASS(channel);
bool change = false;
if(DTASK_AND(NOTES | CURRENT_NOTE)) {
const key_event_t *note = DELAY_READ(DREF(current_note), key_event_t, HISTORY, 0);
if(*DREF_PASS(infer_scale_mode) != INFER_SCALE_LOCK ||
in_key(*DREF_PASS(infer_scale), note->id)) {
synth_note(channel,
note->id,
note->velocity > 0,
abs(note->velocity));
change = true;
}
}
if(state->events & CHANNEL_PRESSURE) {
write_synth((seg_t) { .n = 2, .s = (char [2]) {
0xd0 | channel,
*DREF(channel_pressure)
}});
change = true;
}
if(state->events & PITCH_BEND) {
write_synth((seg_t) { .n = 3, .s = (char [3]) {
0xe0 | channel,
*DREF(pitch_bend) & 0x7f,
(*DREF(pitch_bend) >> 7) & 0x7f
}});
change = true;
}
return change;
}
DTASK_ENABLE(set_page) {
DREF(set_page)->note = -1;
DREF(set_page)->keep = 0xff;
}
DTASK(set_page, struct { int val, set, keep, note; }) {
const control_change_t *cc = DREF(control_change);
set_page_t *p = DREF(set_page);
if(*DREF(new_button)) {
p->val = 0;
p->keep = 0;
p->set = 0;
p->note = -1;
return true;
}
if(state->events & CONTROL_CHANGE) {
int c = cc->control;
bool top = INRANGE(c, 20, 27);
bool bottom = INRANGE(c, 102, 109);
if(cc->value) {
p->note = -1;
if(bottom) {
p->val = (c - 102) * 8 | (p->val & 0x07);
p->set |= 0x38;
} else if(top) {
p->val = (p->val & 0x38) | (c - 20);
p->set |= 0x07;
}
} else if(p->set && (top || bottom)) {
p->val &= p->set;
p->keep = 0x38 & ~p->set; // subpage = 0 if not set
p->set = 0;
return true; // event on release
}
}
if(state->events & CURRENT_NOTE) {
const key_event_t *note = DELAY_READ(DREF(current_note), key_event_t, HISTORY, 0);
if(note->velocity > 0) {
if(p->set) {
p->val &= p->set;
p->keep = 0x38 & ~p->set; // subpage = 0 if not set
p->set = 0;
p->note = note->id;
return true;
} else if(p->note >= 0) {
p->note = note->id;
return true;
}
}
}
return false;
}
DTASK(playback, struct { vec128b played[16]; }) {
vec128b *played = DREF(playback)->played;
unsigned int beat = DREF(beat)->now;
vec128b *notes = DREF(record)->notes[beat];
vec128b *extra = DREF(record)->extra;
int channel = *DREF_PASS(channel);
unsigned int disable = *DREF_PASS(disable_channel);
bool changed = false;
if(*DREF(playing)) {
// setup channels
if(state->events & PLAYING) {
COUNTDOWN(c, 16) {
write_synth((seg_t) { // bank LSB
.n = 3,
.s = (char [3]) { 0xb0 | c, 32,
DREF_PASS(program)->bank[c] }
});
write_synth((seg_t) { // program
.n = 2,
.s = (char [2]) { 0xc0 | c,
DREF_PASS(program)->program[c] }
});
write_synth((seg_t) { // volume
.n = 3,
.s = (char [3]) { 0xb0 | c, 7,
DREF_PASS(volume)->arr[c] }
});
}
}
map_iterator it = map_iterator_begin(DREF(record)->events, beat);
pair_t *p = map_find_iter(&it);
while(p) {
msg_data_t msg = { .data = p->second };
int control = msg.byte[0] & 0xf0;
if(control == 0x90) {
int c = msg.byte[0] & 0x0f;
if(!(disable & 1ull << c)) {
synth_note(c, msg.byte[1], true, msg.byte[2]);
vec128b_set_bit(&played[c], msg.byte[1]);
changed = true;
}
} else if(ONEOF(control, 0xd0, 0xe0)) {
int n = min(sizeof(msg.byte), fixed_length(msg.byte[0]));
write_synth((seg_t) { .n = n, .s = msg.byte });
}
p = map_next(&it, p);
}
COUNTUP(c, 16) {
if(disable & 1ull << c) {
continue;
}
vec128b pressed = notes[c];
vec128b_or(&pressed, &extra[c]);
if(c == channel) vec128b_or(&pressed, &DREF(notes)->v);
vec128b released = played[c];
vec128b_and_not(&released, &pressed);
COUNTUP(i, 128) {
if(vec128b_bit_is_set(&released, i)) {
synth_note(c, i, false, 0);
vec128b_clear_bit(&played[c], i);
changed = true;
}
}
}
} else if(state->events & PLAYING) {
// clear notes
COUNTDOWN(c, 16) {
all_notes_off(c);
}
}
return changed;
}
// TODO optimize
int min_note(vec128b *v) {
COUNTUP(n, 128) {
if(vec128b_bit_is_set(v, n)) {
return n;
}
}
return -1;
}
DTASK_ENABLE(show_playback) {
COUNTUP(i, 64) {
int c = background_color(pad_to_note(i) + *DREF(transpose), *DREF(infer_scale));
DREF(show_playback)->pad_state[i] = c;
set_pad_color(i, c);
}
}
DTASK(show_playback, struct { uint8_t pad_state[64]; }) {
uint8_t *pad_state = DREF(show_playback)->pad_state;
unsigned int beat = DREF(beat)->now;
vec128b *extra = DREF(record)->extra;
int channel = *DREF(channel);
unsigned int disable = *DREF(disable_channel);
uint64_t pads = *DREF(pads);
vec128b notes[16];
vec128b all_notes = DREF(notes)->v;
COUNTUP(c, 16) {
notes[c] = DREF(record)->notes[beat][c];
vec128b_or(¬es[c], &extra[c]);
if(!(disable & 1u << c)) {
vec128b_or(&all_notes, ¬es[c]);
}
}
if(!(disable & 1u << channel)) {
vec128b_or(¬es[channel], &DREF(notes)->v);
}
int scale = *DREF(infer_scale);
bool changed = false;
COUNTUP(i, 64) {
uint64_t bit = 1ull << i;
int note = pad_to_note(i) + *DREF(transpose);
int color = 0;
if(INRANGE(note, 0, 127)) {
color = background_color(note, scale);
if(vec128b_bit_is_set(&all_notes, note)) {
color = PAD_YELLOW;
if(vec128b_bit_is_set(¬es[channel], note)) {
color = PAD_RED;
}
}
if(pads & bit) {
color = in_key(*DREF(infer_scale), note) ? PAD_GREEN : PAD_PURPLE;
}
}
if(pad_state[i] != color) {
set_pad_color(i, color);
pad_state[i] = color;
changed = true;
}
}
int base_note = min_note(&DREF(notes)->v);
if(base_note >= 0) { // show base note
printf_text(0, 0, "note: %.2s, octave: %2d, number: %3d",
get_note_name(base_note),
get_note_octave(base_note),
base_note);
}
printf_text(0, 1, "scale: %.2s", get_note_name(scale));
return changed;
}
DTASK_ENABLE(light_bar) {
COUNTUP(i, 8) {
send_msg(0xb0, i + 20, 0);
send_msg(0xb0, i + 102, 0);
}
}
DTASK(light_bar, int) {
int new = DREF(beat)->now / BEATS_PER_PAGE;
int old = *DREF_WEAK(light_bar);
int diff = new ^ old;
if(diff & 0x07) send_msg(0xb0, (old & 7) + 20, 0);
if(diff & 0x38) send_msg(0xb0, ((old >> 3) & 7) + 102, 0);
send_msg(0xb0, (new & 7) + 20, 22);
send_msg(0xb0, ((new >> 3) & 7) + 102, 22);
*DREF(light_bar) = new;
return true;
}
DTASK_ENABLE(new_button) {
send_msg(0xb0, 87, 1);
}
DTASK(new_button, bool) {
const control_change_t *cc = DREF(control_change);
if(cc->control == 87) {
*DREF(new_button) = cc->value;
if(cc->value) COUNTUP(c, 16) all_notes_off(c);
return true;
}
return false;
}
DTASK_ENABLE(playing) {
send_msg(0xb0, 85, 2);
*DREF(playing) = false;
}
DTASK(playing, bool) {
const control_change_t *cc = DREF(control_change);
if(!(state->events & CONTROL_CHANGE)) return true; // allow external triggering
if(cc->control == 85 && cc->value) {
*DREF(playing) = !*DREF(playing);
send_msg(0xb0, 85, *DREF(playing) ? 1 : 2);
return true;
}
return false;
}
DTASK_ENABLE(recording) {
send_msg(0xb0, 86, 0);
*DREF(recording) = false;
}
DTASK(recording, bool) {
const control_change_t *cc = DREF(control_change);
if(cc->control == 86 && cc->value) {
*DREF(recording) = !*DREF(recording);
send_msg(0xb0, 86, *DREF(recording) ? 4 : 0);
return true;
}
return false;
}
DTASK(shuttle, int8_t) {
const control_change_t *cc = DREF(control_change);
if(cc->control == 15 && cc->value) {
int8_t val = cc->value;
if(val >= 64) val = val - 128;
*DREF(shuttle) = val;
return true;
}
return false;
}
DTASK(volume, struct { int arr[16]; }) {
const control_change_t *cc = DREF(control_change);
int channel = *DREF_PASS(channel);
if(cc->control == 79) {
int val = cc->value;
if(val >= 64) val = val - 128;
int *p = &DREF(volume)->arr[channel];
*p = clamp(0, 127, *p + val);
write_synth((seg_t) {
.n = 3,
.s = (char [3]) { 0xb0 | channel, 7, *p }
});
return true;
}
return false;
}
DTASK_ENABLE(show_volume) {
printf_text(51, 3, "volume: %3d", DREF(volume)->arr[*DREF(channel)]);
}
DTASK(show_volume, bool) {
printf_text(51, 3, "volume: %3d", DREF(volume)->arr[*DREF(channel)]);
return true;
}
DTASK(program, struct { int bank[16], program[16]; }) {
const control_change_t *cc = DREF(control_change);
int channel = *DREF_PASS(channel);
if(cc->control == 78) {
int val = cc->value;
if(val >= 64) val -= 128;
int *b = &DREF(program)->bank[channel];
int *p = &DREF(program)->program[channel];
int pb = (*b << 7) | *p;
pb = (pb + val + BANKS * 128) % (BANKS * 128);
*b = pb >> 7;
*p = pb & 0x7f;
write_synth((seg_t) { // bank LSB
.n = 3,
.s = (char [3]) { 0xb0 | channel, 32, *b }
});
write_synth((seg_t) { // program
.n = 2,
.s = (char [2]) { 0xc0 | channel, *p }
});
return true;
}
return false;
}
DTASK_ENABLE(show_program) {
__dtask_show_program(state);
}
DTASK(show_program, bool) {
printf_text(51, 0, "program: %c%3d",
'A' + DREF(program)->bank[*DREF(channel)],
DREF(program)->program[*DREF(channel)]);
return true;
}
DTASK_ENABLE(channel) {
send_msg(0xb0, 44, 1);
send_msg(0xb0, 45, 1);
*DREF(channel) = 0;
printf_text(51, 1, "channel: %2d", *DREF(channel) + 1);
}
DTASK(channel, int) {
const control_change_t *cc = DREF(control_change);
if(ONEOF(cc->control, 44, 45) && cc->value) {
*DREF(channel) = (*DREF(channel) + (cc->control == 44 ? 15 : 1)) % 16;
printf_text(51, 1, "channel: %2d", *DREF(channel) + 1);
return true;
}
return false;
}
DTASK_ENABLE(show_disable_channel) {
send_msg(0xb0, 48, 4);
*DREF(disable_channel) = 0;
}
DTASK(show_disable_channel, bool) {
unsigned int bit = 1ull << *DREF(channel);
send_msg(0xb0, 48, *DREF(disable_channel) & bit ? (DREF(record)->active & bit ? 2 : 0) : 4);
return true;
}
DTASK(disable_channel, unsigned int) {
int channel = *DREF_PASS(channel);
const control_change_t *cc = DREF(control_change);
if(cc->control == 48 && cc->value) {
*DREF(disable_channel) ^= 1ull << channel;
return true;
}
return false;
}
#define ALIGNMENT_PADDING(x, m) ((m - x % m) % m)
static void show_octave(int off) {
printf_text(51, 2, "octave: %1d%s", get_note_octave(off), off % 12 ? ".5" : " ");
}
DTASK_ENABLE(transpose) {
send_msg(0xb0, 46, 1);
send_msg(0xb0, 47, 1);
*DREF(transpose) = 43;
show_octave(*DREF(transpose));
}
const int upper_limit = 128 - 24 + ALIGNMENT_PADDING(128 - 24, 12);
DTASK(transpose, int8_t) {
const control_change_t *cc = DREF(control_change);
if(ONEOF(cc->control, 46, 47) && cc->value) {
int8_t *off = DREF(transpose);
int step = *off % 12 ? 5 : 7;
*off = clamp(0, upper_limit, (int)*off + (cc->control == 47 ? step - 12 : step));
show_octave(*off);
return true;
}
return false;
}
DTASK_ENABLE(poweroff) {
*DREF(poweroff) = false;
}