int main_threshold(int argc, char* argv[])
{
unsigned int flags = 0;
enum th_type { NONE, WAV, LLR, DFW, MPDFW, HARD } th_type = NONE;
int llrblk = 8;
const struct opt_s opts[] = {
OPT_SELECT('H', enum th_type, &th_type, HARD, "hard thresholding"),
OPT_SELECT('W', enum th_type, &th_type, WAV, "daubechies wavelet soft-thresholding"),
OPT_SELECT('L', enum th_type, &th_type, LLR, "locally low rank soft-thresholding"),
OPT_SELECT('D', enum th_type, &th_type, DFW, "divergence-free wavelet soft-thresholding"),
OPT_UINT('j', &flags, "bitmask", "joint soft-thresholding"),
OPT_INT('b', &llrblk, "blocksize", "locally low rank block size"),
};
cmdline(&argc, argv, 3, 3, usage_str, help_str, ARRAY_SIZE(opts), opts);
num_init();
const int N = DIMS;
long dims[N];
complex float* idata = load_cfl(argv[2], N, dims);
complex float* odata = create_cfl(argv[3], N, dims);
float lambda = atof(argv[1]);
switch (th_type) {
case WAV:
wthresh(N, dims, lambda, flags, odata, idata);
break;
case LLR:
lrthresh(N, dims, llrblk, lambda, flags, odata, idata);
break;
case DFW:
dfthresh(N, dims, lambda, odata, idata);
break;
case HARD:
hard_thresh(N, dims, lambda, odata, idata);
break;
default:
md_zsoftthresh(N, dims, lambda, flags, odata, idata);
}
unmap_cfl(N, dims, idata);
unmap_cfl(N, dims, odata);
return 0;
}
int
cc_compress(struct cc **output, struct cc **tokens, char flag)
{
struct cc **pp = tokens;
struct cc *p = *pp++;
int length = p->length;
int threshold = thresh(length);
#ifndef cc_weight
short wthreshold = wthresh(length);
#endif
short *places = cc_places[length];
int *initial_scores = cc_initial_scores[length];
int initial_score0 = put_token_score(length);
do {
int score;
struct cc_undo *undop;
int ccount;
#ifdef STATS
int ncover;
#endif
int i;
ccount = p->ccount;
if ((short) ccount >= p->bcount)
continue;
if (p->code >= 0 || ccount >= threshold)
score = 0;
#ifndef cc_weight
else if (p->weight >= wthreshold)
/* allow one fewer match than normal */
/* XXX, should adjust for ccount */
score = - tt.tt_set_token_cost;
#endif
else
score = initial_scores[ccount];
undop = cc_undo;
#ifdef STATS
ncover = 0;
#endif
for (i = p->places; i >= 0; i = places[i]) {
struct cc **jp;
struct cc *x;
struct cc **ip = output + i;
int score0 = initial_score0;
struct cc **iip = ip + length;
struct cc_undo *undop1 = undop;
if ((x = *(jp = ip)) != 0)
goto z;
while (--jp >= output)
if ((x = *jp) != 0) {
if (jp + x->length > ip)
goto z;
break;
}
jp = ip + 1;
while (jp < iip) {
if ((x = *jp) == 0) {
jp++;
continue;
}
z:
if (x == p)
goto undo;
#ifdef STATS
ncover++;
#endif
undop->pos = jp;
undop->val = x;
undop++;
*jp = 0;
x->ccount--;
score_adjust(score0, x);
if (score0 < 0 && flag)
goto undo;
jp += x->length;
}
undop->pos = ip;
undop->val = 0;
undop++;
*ip = p;
ccount++;
score += score0;
continue;
undo:
while (--undop >= undop1)
if ((*undop->pos = x = undop->val))
x->ccount++;
undop++;
}
if (score > 0) {
#ifdef STATS
ccount_stat += ccount - p->ccount;
ntoken_stat++;
ncover_stat += ncover;
#endif
p->ccount = ccount;
} else {
struct cc_undo *u = cc_undo;
while (--undop >= u) {
struct cc *x;
if ((*undop->pos = x = undop->val))
x->ccount++;
}
}
} while ((p = *pp++) != 0);
return pp - tokens;
}
int
cc_sweep(char *buffer, int bufsize, struct cc **tokens, int length)
{
struct cc *p;
char *cp;
int i;
short *hc;
short *places = cc_places[length];
struct cc **pp = tokens;
short threshold = thresh(length);
#ifndef cc_weight
short wthreshold = wthresh(length);
short limit = wlimit(length);
#endif
int time0;
short pc = tt.tt_padc;
i = length - 1;
bufsize -= i;
cp = buffer + i;
hc = cc_hashcodes;
time0 = cc_time0;
for (i = 0; i < bufsize; i++, time0++) {
struct cc **h;
{
short *hc1 = hc;
short c = *cp++;
short hh;
if ((hh = *hc1) < 0 || c == pc) {
*hc1++ = -1;
hc = hc1;
continue;
}
h = cc_htab + (*hc1++ = hash(hh, c));
hc = hc1;
}
for (p = *h; p != 0; p = p->hforw)
if (p->length == (char) length) {
char *p1 = p->string;
char *p2 = cp - length;
int n = length;
do
if (*p1++ != *p2++)
goto fail;
while (--n);
break;
fail:
;
}
if (p == 0) {
p = cc_q1a.qback;
if (p == &cc_q1a ||
(p->time >= cc_time0 && p->length == (char) length))
continue;
if (p->hback != 0)
if ((*p->hback = p->hforw) != 0)
p->hforw->hback = p->hback;
{
char *p1 = p->string;
char *p2 = cp - length;
int n = length;
do
*p1++ = *p2++;
while (--n);
}
p->length = length;
#ifndef cc_weight
p->weight = cc_weight;
#endif
p->time = time0;
p->bcount = 1;
p->ccount = 0;
p->flag = 0;
if ((p->hforw = *h) != 0)
p->hforw->hback = &p->hforw;
*h = p;
p->hback = h;
qinsert(p, &cc_q1a);
places[i] = -1;
p->places = i;
#ifdef STATS
ntoken_stat++;
#endif
} else if (p->time < cc_time0) {
#ifndef cc_weight
if ((p->weight += p->time - time0) < 0)
p->weight = cc_weight;
else if ((p->weight += cc_weight) > limit)
p->weight = limit;
#endif
p->time = time0;
p->bcount = 1;
p->ccount = 0;
if (p->code >= 0) {
p->flag = 1;
*pp++ = p;
} else
#ifndef cc_weight
if (p->weight >= wthreshold) {
p->flag = 1;
*pp++ = p;
qinsert(p, &cc_q1b);
} else
#endif
{
p->flag = 0;
qinsert(p, &cc_q1a);
}
places[i] = -1;
p->places = i;
#ifdef STATS
ntoken_stat++;
#endif
} else if (p->time + length > time0) {
/*
* overlapping token, don't count as two and
* don't update time0, but do adjust weight to offset
* the difference
*/
#ifndef cc_weight
if (cc_weight != 0) { /* XXX */
p->weight += time0 - p->time;
if (!p->flag && p->weight >= wthreshold) {
p->flag = 1;
*pp++ = p;
qinsert(p, &cc_q1b);
}
}
#endif
places[i] = p->places;
p->places = i;
} else {
#ifndef cc_weight
if ((p->weight += p->time - time0) < 0)
p->weight = cc_weight;
else if ((p->weight += cc_weight) > limit)
p->weight = limit;
#endif
p->time = time0;
p->bcount++;
if (!p->flag &&
/* code must be < 0 if flag false here */
(p->bcount >= threshold
#ifndef cc_weight
|| p->weight >= wthreshold
#endif
)) {
p->flag = 1;
*pp++ = p;
qinsert(p, &cc_q1b);
}
places[i] = p->places;
p->places = i;
}
}
if ((i = pp - tokens) > 0) {
*pp = 0;
if (cc_reverse)
cc_sweep_reverse(tokens, places);
if (cc_sort && i > 1) {
qsort((char *) tokens, i, sizeof *tokens,
cc_token_compare);
}
if (cc_chop) {
if ((i = i * cc_chop / 100) == 0)
i = 1;
tokens[i] = 0;
}
i++;
}
return i;
}
