void zbar_image_scanner_destroy (zbar_image_scanner_t *iscn)
{
dump_stats(iscn);
if(iscn->syms) {
if(iscn->syms->refcnt)
zbar_symbol_set_ref(iscn->syms, -1);
else
_zbar_symbol_set_free(iscn->syms);
iscn->syms = NULL;
}
if(iscn->scn)
zbar_scanner_destroy(iscn->scn);
iscn->scn = NULL;
if(iscn->dcode)
zbar_decoder_destroy(iscn->dcode);
iscn->dcode = NULL;
int i;
for(i = 0; i < RECYCLE_BUCKETS; i++) {
zbar_symbol_t *sym, *next;
for(sym = iscn->recycle[i].head; sym; sym = next) {
next = sym->next;
_zbar_symbol_free(sym);
}
}
#ifdef ENABLE_QRCODE
if(iscn->qr) {
_zbar_qr_destroy(iscn->qr);
iscn->qr = NULL;
}
#endif
free(iscn);
}
inline void zbar_image_scanner_recycle_image (zbar_image_scanner_t *iscn,
zbar_image_t *img)
{
zbar_symbol_set_t *syms = iscn->syms;
if(syms && syms->refcnt) {
if(recycle_syms(iscn, syms)) {
STAT(iscn_syms_inuse);
iscn->syms = NULL;
}
else
STAT(iscn_syms_recycle);
}
syms = img->syms;
img->syms = NULL;
if(syms && recycle_syms(iscn, syms)) {
STAT(img_syms_inuse);
syms = iscn->syms;
}
else if(syms) {
STAT(img_syms_recycle);
/* select one set to resurrect, destroy the other */
if(iscn->syms) {
_zbar_symbol_set_free(syms);
syms = iscn->syms;
}
else
iscn->syms = syms;
}
}
void zbar_symbol_set_ref (const zbar_symbol_set_t *syms,
int delta)
{
zbar_symbol_set_t *ncsyms = (zbar_symbol_set_t*)syms;
if(!_zbar_refcnt(&ncsyms->refcnt, delta) && delta <= 0)
_zbar_symbol_set_free(ncsyms);
}
void _zbar_image_scanner_recycle_syms (zbar_image_scanner_t *iscn,
zbar_symbol_t *sym)
{
zbar_symbol_t *next = NULL;
for(; sym; sym = next) {
next = sym->next;
if(sym->refcnt && _zbar_refcnt(&sym->refcnt, -1)) {
/* unlink referenced symbol */
/* FIXME handle outstanding component refs (currently unsupported)
*/
assert(sym->data_alloc);
sym->next = NULL;
}
else {
int i;
recycle_bucket_t *bucket;
/* recycle unreferenced symbol */
if(!sym->data_alloc) {
sym->data = NULL;
sym->datalen = 0;
}
if(sym->syms) {
if(_zbar_refcnt(&sym->syms->refcnt, -1))
assert(0);
_zbar_image_scanner_recycle_syms(iscn, sym->syms->head);
sym->syms->head = NULL;
_zbar_symbol_set_free(sym->syms);
sym->syms = NULL;
}
for(i = 0; i < RECYCLE_BUCKETS; i++)
if(sym->data_alloc < 1 << (i * 2))
break;
if(i == RECYCLE_BUCKETS) {
assert(sym->data);
free(sym->data);
sym->data = NULL;
sym->data_alloc = 0;
i = 0;
}
bucket = &iscn->recycle[i];
/* FIXME cap bucket fill */
bucket->nsyms++;
sym->next = bucket->head;
bucket->head = sym;
}
}
}
