120 lines
3.6 KiB
C
120 lines
3.6 KiB
C
// cppcheck-suppress missingIncludeSystem
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#include "midi.h"
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#include "channel.h"
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#include <jack/jack.h>
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#include <jack/midiport.h>
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#include <stdatomic.h>
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extern atomic_int control_key_active;
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extern atomic_int cmd_add;
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extern atomic_int cmd_remove;
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extern atomic_int cmd_load;
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extern atomic_int cmd_save;
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extern atomic_int bind_channel;
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void midi_handle_events(void *port_buffer, jack_nframes_t nframes) {
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(void)nframes;
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jack_nframes_t nevents = jack_midi_get_event_count(port_buffer);
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jack_midi_event_t ev;
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for (jack_nframes_t i = 0; i < nevents; i++) {
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if (jack_midi_event_get(&ev, port_buffer, i) != 0)
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continue;
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if (ev.size < 3)
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continue;
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unsigned char status = ev.buffer[0];
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unsigned char note = ev.buffer[1];
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unsigned char vel = ev.buffer[2];
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/* note‑on */
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if ((status & 0xf0) == 0x90 && vel > 0) {
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if (note == 64) {
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atomic_store(&control_key_active, 1);
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} else {
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int ck = atomic_load(&control_key_active);
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if (ck) {
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atomic_store(&control_key_active, 0);
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if (note < 16) {
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atomic_store(&bind_channel, note);
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} else {
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switch (note) {
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case 60:
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atomic_store(&cmd_add, 1);
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break;
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case 61:
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atomic_store(&cmd_remove, 1);
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break;
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case 62: /* trigger looper – channel via bind_channel */
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{
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int bch = atomic_load(&bind_channel);
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if (bch >= 0 && bch < MAX_CHANNELS) {
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int cur = atomic_load(&channels[bch].state);
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switch (cur) {
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case STATE_IDLE:
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atomic_store(&channels[bch].state, STATE_RECORD);
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break;
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case STATE_RECORD:
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atomic_store(&channels[bch].state, STATE_LOOPING);
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break;
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case STATE_LOOPING:
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atomic_store(&channels[bch].state, STATE_PAUSED);
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break;
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case STATE_PAUSED:
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atomic_store(&channels[bch].state, STATE_LOOPING);
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break;
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}
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}
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} break;
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case 63: /* unbind – reset bind to channel 0 */
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atomic_store(&bind_channel, 0);
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break;
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case 70: /* load WAV into channel 0 */
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atomic_store(&cmd_load, 1);
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break;
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case 71: /* save WAV of channel 0 */
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atomic_store(&cmd_save, 1);
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break;
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default:
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break;
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}
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}
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} else {
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/* direct mapping */
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switch (note) {
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case 1: /* toggle channel 0 */
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{
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int cur0 = atomic_load(&channels[0].state);
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switch (cur0) {
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case STATE_IDLE:
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atomic_store(&channels[0].state, STATE_RECORD);
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break;
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case STATE_RECORD:
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atomic_store(&channels[0].state, STATE_LOOPING);
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break;
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case STATE_LOOPING:
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atomic_store(&channels[0].state, STATE_PAUSED);
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break;
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case STATE_PAUSED:
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atomic_store(&channels[0].state, STATE_LOOPING);
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break;
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}
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} break;
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case 60:
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atomic_store(&cmd_add, 1);
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break;
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case 61:
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atomic_store(&cmd_remove, 1);
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break;
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default:
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break;
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}
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}
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}
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} else if ((status & 0xf0) == 0x80 ||
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((status & 0xf0) == 0x90 && vel == 0)) {
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atomic_store(&control_key_active, 0);
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}
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}
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}
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