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- genome(seed, salts) now has three parts with their own RNG streams: shared (steps, form, swing, arc, layback, fill odds, phase offset), kit (density, frame, accent cycle, free snare) and keys (scale/root, progression, motif, hocket, bass tone, note lengths, range). ROLL KEYS now renews the harmony too; ROLL KIT leaves the keys alone. - Keys generators share one signature and can fix note lengths: MOTIF (the old line), 303 (acid bass, answers in the rests, drone or silent pad), TURING (8/16-bit shift register, DRIFT flips bits, 16-bar window), ARP (triad/7th arpeggio, roots on kicks). - Pages: KIT GEN, KEYS GEN; ROLL shows KIT / KEYS; slots keep both gens. - Flash record v3 (old settings ignored). Bring-up golden checksums updated. - C port matches; host test and ASan/UBSan pass. Intended music change: every seed sounds different (genome split, new generators). Vectors regenerated with npm run vectors; the case grid now crosses all kit and keys generators, with TURING runs past its window. Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
74 lines
2.6 KiB
C
74 lines
2.6 KiB
C
#include "storage.h"
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#include "hardware/flash.h"
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#include "pico/flash.h"
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#include <stddef.h>
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#include <string.h>
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#define MAGIC 0x53425831u /* "SBX1" */
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#define VERSION 3 /* 3: KEYS GEN. Older records are ignored. */
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#define OFFSET (PICO_FLASH_SIZE_BYTES - FLASH_SECTOR_SIZE)
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#define BUFSZ 512
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typedef struct {
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uint32_t magic, version;
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uint32_t seed, salts[2];
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int32_t gen, keys, bpm, scale, root, mono_ch, mono_oct;
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uint8_t on[SB_NT];
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pad_t learn[NKIT];
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slot_t slots[NSLOTS];
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uint32_t crc;
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} record_t;
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_Static_assert(sizeof(record_t) <= BUFSZ, "record too big");
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static uint32_t crc(const record_t *r){
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const uint8_t *p = (const uint8_t *)r;
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uint32_t h = 0x811C9DC5u;
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size_t i;
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for(i = 0; i < offsetof(record_t, crc); i++) h = (h ^ p[i]) * 0x01000193u;
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return h;
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}
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/* defaults from app.js DEF and app */
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void storage_defaults(live_t *L, slot_t *slots){
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int t;
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memset(L, 0, sizeof *L);
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L->state.seed = 0x5EEDB0C5u;
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L->gen = 0; L->keys = 0; L->scale = -1; L->root = -1; L->energy = 64; L->drift = 32; L->bpm = 165;
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for(t = 0; t < SB_NT; t++) L->on[t] = 1;
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L->mono_ch = 1; L->mono_oct = 0; L->clock = 1;
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memset(slots, 0, sizeof(slot_t) * NSLOTS);
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}
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int storage_load(live_t *L, slot_t *slots){
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const record_t *r = (const record_t *)(XIP_BASE + OFFSET);
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int t;
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storage_defaults(L, slots);
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if(r->magic != MAGIC || r->version != VERSION || r->crc != crc(r)) return 0;
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L->state.seed = r->seed; L->state.salts[0] = r->salts[0]; L->state.salts[1] = r->salts[1];
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L->gen = r->gen; L->keys = r->keys; L->bpm = r->bpm; L->scale = r->scale; L->root = r->root; L->mono_ch = r->mono_ch; L->mono_oct = r->mono_oct;
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for(t = 0; t < SB_NT; t++) L->on[t] = r->on[t] ? 1 : 0;
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memcpy(L->learn, r->learn, sizeof L->learn);
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memcpy(slots, r->slots, sizeof r->slots);
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return 1;
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}
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static void do_write(void *buf){
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flash_range_erase(OFFSET, FLASH_SECTOR_SIZE);
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flash_range_program(OFFSET, (const uint8_t *)buf, BUFSZ);
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}
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int storage_save(const live_t *L, const slot_t *slots){
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static uint8_t buf[BUFSZ] __attribute__((aligned(4)));
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record_t *r = (record_t *)buf;
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memset(buf, 0xFF, sizeof buf);
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memset(r, 0, sizeof *r);
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r->magic = MAGIC; r->version = VERSION;
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r->seed = L->state.seed; r->salts[0] = L->state.salts[0]; r->salts[1] = L->state.salts[1];
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r->gen = L->gen; r->keys = L->keys; r->bpm = L->bpm; r->scale = L->scale; r->root = L->root; r->mono_ch = L->mono_ch; r->mono_oct = L->mono_oct;
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memcpy(r->on, L->on, sizeof r->on);
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memcpy(r->learn, L->learn, sizeof r->learn);
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memcpy(r->slots, slots, sizeof r->slots);
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r->crc = crc(r);
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return flash_safe_execute(do_write, buf, 500) == PICO_OK;
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}
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