tseq

Overview

tseq is a simple sequencer that reads values from a table, and is clocked by a trigger. Eventually, it will have programable modes.

Tangled Files

tseq.h and tseq.c.

#ifndef SK_TSEQ_H
#define SK_TSEQ_H

#ifndef SKFLT
#define SKFLT float
#endif

<<typedefs>>
<<funcdefs>>

#ifdef SK_TSEQ_PRIV
<<structs>>
#endif

#endif

#define SK_TSEQ_PRIV
#include "tseq.h"

<<funcs>>

Struct and Initialization

typedef struct sk_tseq sk_tseq;

struct sk_tseq {
    SKFLT *seq;
    int sz;
    int pos;
    int mode; /* TODO */
};

void sk_tseq_init(sk_tseq *ts, SKFLT *seq, int sz);

The position is explicitely set to -1 so that if there is an initial tick in the beginning, it will increment to the first value (0).

void sk_tseq_init(sk_tseq *ts, SKFLT *seq, int sz)
{
    ts->seq = seq;
    ts->sz = sz;
    ts->pos = -1;
    ts->mode = 0; /* TODO */
}

Computation

SKFLT sk_tseq_tick(sk_tseq *ts, SKFLT trig);

SKFLT sk_tseq_tick(sk_tseq *ts, SKFLT trig)
{
    SKFLT out;

    out = 0;

    if (trig != 0) {
        ts->pos++;
        if (ts->pos >= ts->sz) ts->pos = 0;
    }

    if (ts->pos < 0) ts->pos = 0;
    if (ts->pos >= ts->sz) ts->pos = ts->sz - 1;

    out = ts->seq[ts->pos];

    return out;
}