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feat: implement scene infrastructure for multi-scene looper support

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Co-authored-by: aider (deepseek/deepseek-reasoner) <aider@aider.chat>
This commit is contained in:
Loic Coenen
2026-05-10 18:00:32 +00:00
parent 44177f785f
commit 7b00246443
6 changed files with 254 additions and 78 deletions
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67
src/channel.c
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@@ -5,6 +5,13 @@
#include <stdio.h>
#include <string.h>
/* Helper: zero a scene and set its state to IDLE */
static void init_scene(scene_t *sc) {
memset(sc, 0, sizeof(scene_t));
atomic_store(&sc->state, STATE_IDLE);
sc->prev_state = -1;
}
void channel_add(jack_client_t *client, int idx) {
struct channel_t *cur = get_channels_array();
@@ -24,12 +31,10 @@ void channel_add(jack_client_t *client, int idx) {
}
atomic_store(&cur[idx].active, 1);
atomic_store(&cur[idx].state, STATE_IDLE);
cur[idx].prev_state = -1;
cur[idx].loop_count = 0;
cur[idx].record_pos = 0;
cur[idx].playback_pos = 0;
cur[idx].type = CHANNEL_AUDIO;
cur[idx].scene_count = 1;
cur[idx].current_scene = 0;
init_scene(&cur[idx].scenes[0]);
next_channel_id++;
atomic_fetch_add(&channel_count, 1);
@@ -54,12 +59,10 @@ void channel_add_midi(jack_client_t *client, int idx) {
}
atomic_store(&cur[idx].active, 1);
atomic_store(&cur[idx].state, STATE_IDLE);
cur[idx].prev_state = -1;
cur[idx].loop_count = 0;
cur[idx].record_pos = 0;
cur[idx].playback_pos = 0;
cur[idx].type = CHANNEL_MIDI;
cur[idx].scene_count = 1;
cur[idx].current_scene = 0;
init_scene(&cur[idx].scenes[0]);
next_channel_id++;
atomic_fetch_add(&channel_count, 1);
@@ -71,3 +74,47 @@ void channel_remove(jack_client_t *client, int idx) {
atomic_store(&cur[idx].active, 0);
atomic_fetch_sub(&channel_count, 1);
}
void channel_add_scene(jack_client_t *client, int idx) {
(void)client;
struct channel_t *cur = get_channels_array();
if (cur[idx].scene_count >= MAX_SCENES)
return;
int ns = cur[idx].scene_count;
init_scene(&cur[idx].scenes[ns]);
cur[idx].scene_count++;
}
void channel_remove_scene(jack_client_t *client, int idx) {
(void)client;
struct channel_t *cur = get_channels_array();
if (cur[idx].scene_count <= 1)
return;
int cs = cur[idx].current_scene;
/* shift remaining scenes down */
for (int i = cs; i < cur[idx].scene_count - 1; i++) {
cur[idx].scenes[i] = cur[idx].scenes[i + 1];
}
cur[idx].scene_count--;
if (cur[idx].current_scene >= cur[idx].scene_count)
cur[idx].current_scene = cur[idx].scene_count - 1;
}
void channel_next_scene(jack_client_t *client, int idx) {
(void)client;
struct channel_t *cur = get_channels_array();
if (cur[idx].scene_count > 1) {
cur[idx].current_scene =
(cur[idx].current_scene + 1) % cur[idx].scene_count;
}
}
void channel_prev_scene(jack_client_t *client, int idx) {
(void)client;
struct channel_t *cur = get_channels_array();
if (cur[idx].scene_count > 1) {
cur[idx].current_scene =
(cur[idx].current_scene - 1 + cur[idx].scene_count) %
cur[idx].scene_count;
}
}