mikael-lovqvists-claude-agent
9b45905d80
Replaces the single-root-pattern sequencer with a Track[] array that allows multiple patterns to loop independently. Adds ADD_TRACK (0x0A), REMOVE_TRACK (0x0B), PLAY_TRACKS (0x0C), and SET_TRACK_MUTE (0x0D) protocol records. The C backend gains per-track pending_subs and a tracks_mutex. The Node server gains track-state APIs (/api/tracks/:id/ active, mute, solo) and the frontend shows per-pattern track/mute/solo buttons in the sidebar list. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>
80 lines
2.2 KiB
C
80 lines
2.2 KiB
C
#pragma once
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#include <stdint.h>
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#include <pthread.h>
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#include <stdatomic.h>
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#include <time.h>
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#include <alsa/asoundlib.h>
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#include "pattern_store.h"
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#define NOTE_OFF_QUEUE_SIZE 256
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#define MAX_SUBS_PER_TRACK 16
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#define MAX_TRACKS 16
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typedef struct {
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struct timespec fire_at;
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uint8_t channel;
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uint8_t note;
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} Pending_Note_Off;
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typedef struct {
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uint16_t pattern_id;
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uint8_t local_step;
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int active;
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} Pending_Sub;
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typedef struct {
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uint16_t pattern_id;
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uint8_t current_step;
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uint8_t current_beat;
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uint8_t muted;
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int active;
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Pending_Sub pending_subs[MAX_SUBS_PER_TRACK];
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int pending_sub_count;
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} Track;
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/* Function pointer used to write frames back to the Node client */
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typedef void (*Send_Fn)(void *ctx, const uint8_t *buf, int len);
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typedef struct {
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/* ALSA */
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snd_seq_t *seq;
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int port_id;
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int client_id;
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/* Pattern store (shared with socket thread) */
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Pattern_Store *ps;
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/* Callback for sending frames to Node */
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Send_Fn send_fn;
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void *send_ctx;
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/* Tracks — protected by tracks_mutex */
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Track tracks[MAX_TRACKS];
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pthread_mutex_t tracks_mutex;
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/* Note-off queue — tick thread only, no mutex needed */
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Pending_Note_Off note_offs[NOTE_OFF_QUEUE_SIZE];
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int note_off_count;
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/* Tempo — protected by tempo_mutex */
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uint16_t bpm_x10;
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pthread_mutex_t tempo_mutex;
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/* Thread control */
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atomic_int running;
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pthread_t tick_thread;
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} Sequencer;
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int sequencer_init(Sequencer *seq, Pattern_Store *ps, const char *alsa_name,
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Send_Fn send_fn, void *send_ctx);
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void sequencer_destroy(Sequencer *seq);
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void sequencer_add_track(Sequencer *seq, uint16_t pattern_id);
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void sequencer_remove_track(Sequencer *seq, uint16_t pattern_id);
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void sequencer_set_track_mute(Sequencer *seq, uint16_t pattern_id, uint8_t muted);
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void sequencer_clear_tracks(Sequencer *seq);
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void sequencer_play(Sequencer *seq);
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void sequencer_stop(Sequencer *seq);
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void sequencer_set_tempo(Sequencer *seq, uint16_t bpm_x10);
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void sequencer_preview_note(Sequencer *seq, uint8_t channel, uint8_t note,
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uint8_t velocity, uint16_t duration_ms);
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