int zbar_scan_image (zbar_image_scanner_t *iscn,
zbar_image_t *img)
{
/* timestamp image
* FIXME prefer video timestamp
*/
#if _POSIX_TIMERS > 0
struct timespec abstime;
clock_gettime(CLOCK_REALTIME, &abstime);
iscn->time = (abstime.tv_sec * 1000) + ((abstime.tv_nsec / 500000) + 1) / 2;
#else
struct timeval abstime;
gettimeofday(&abstime, NULL);
iscn->time = (abstime.tv_sec * 1000) + ((abstime.tv_usec / 500) + 1) / 2;
#endif
#ifdef ENABLE_QRCODE
_zbar_qr_reset(iscn->qr);
#endif
/* get grayscale image, convert if necessary */
if(img->format != fourcc('Y','8','0','0') &&
img->format != fourcc('G','R','E','Y')){
printf("ERROR: zbar unsupported format: %x ", img->format);
return(-1);
}
iscn->img = img;
/* recycle previous scanner and image results */
zbar_image_scanner_recycle_image(iscn, img);
zbar_symbol_set_t *syms = iscn->syms;
if(!syms) {
syms = iscn->syms = _zbar_symbol_set_create();
STAT(syms_new);
zbar_symbol_set_ref(syms, 1);
}
else
zbar_symbol_set_ref(syms, 2);
img->syms = syms;
unsigned w = img->width;
unsigned h = img->height;
const uint8_t *data = img->data;
zbar_image_write_png(img, "debug.png");
svg_open("debug.svg", 0, 0, w, h);
svg_image("debug.png", w, h);
zbar_scanner_t *scn = iscn->scn;
int density = CFG(iscn, ZBAR_CFG_Y_DENSITY);
if(density > 0) {
svg_group_start("scanner", 0, 1, 1, 0, 0);
const uint8_t *p = data;
int x = 0, y = 0;
iscn->dy = 0;
int border = (((h - 1) % density) + 1) / 2;
if(border > h / 2)
border = h / 2;
movedelta(0, border);
iscn->v = y;
zbar_scanner_new_scan(scn);
while(y < h) {
zprintf(128, "img_x+: %04d,%04d @%p\n", x, y, p);
svg_path_start("vedge", 1. / 32, 0, y + 0.5);
iscn->dx = iscn->du = 1;
iscn->umin = 0;
while(x < w) {
uint8_t d = *p;
movedelta(1, 0);
zbar_scan_y(scn, d);
}
ASSERT_POS;
quiet_border(iscn);
svg_path_end();
movedelta(-1, density);
iscn->v = y;
if(y >= h)
break;
zprintf(128, "img_x-: %04d,%04d @%p\n", x, y, p);
svg_path_start("vedge", -1. / 32, w, y + 0.5);
iscn->dx = iscn->du = -1;
iscn->umin = w;
while(x >= 0) {
uint8_t d = *p;
movedelta(-1, 0);
zbar_scan_y(scn, d);
}
ASSERT_POS;
quiet_border(iscn);
svg_path_end();
movedelta(1, density);
iscn->v = y;
}
svg_group_end();
}
iscn->dx = 0;
density = CFG(iscn, ZBAR_CFG_X_DENSITY);
if(density > 0) {
svg_group_start("scanner", 90, 1, -1, 0, 0);
const uint8_t *p = data;
int x = 0, y = 0;
int border = (((w - 1) % density) + 1) / 2;
if(border > w / 2)
border = w / 2;
movedelta(border, 0);
iscn->v = x;
while(x < w) {
zprintf(128, "img_y+: %04d,%04d @%p\n", x, y, p);
svg_path_start("vedge", 1. / 32, 0, x + 0.5);
iscn->dy = iscn->du = 1;
iscn->umin = 0;
while(y < h) {
uint8_t d = *p;
movedelta(0, 1);
zbar_scan_y(scn, d);
}
ASSERT_POS;
quiet_border(iscn);
svg_path_end();
movedelta(density, -1);
iscn->v = x;
if(x >= w)
break;
zprintf(128, "img_y-: %04d,%04d @%p\n", x, y, p);
svg_path_start("vedge", -1. / 32, h, x + 0.5);
iscn->dy = iscn->du = -1;
iscn->umin = h;
while(y >= 0) {
uint8_t d = *p;
movedelta(0, -1);
zbar_scan_y(scn, d);
}
ASSERT_POS;
quiet_border(iscn);
svg_path_end();
movedelta(density, 1);
iscn->v = x;
}
svg_group_end();
}
iscn->dy = 0;
iscn->img = NULL;
#ifdef ENABLE_QRCODE
_zbar_qr_decode(iscn->qr, iscn, img);
#endif
/* FIXME tmp hack to filter bad EAN results */
if(syms->nsyms && !iscn->enable_cache &&
(density == 1 || CFG(iscn, ZBAR_CFG_Y_DENSITY) == 1)) {
zbar_symbol_t **symp = &syms->head, *sym;
while((sym = *symp)) {
if(sym->type < ZBAR_I25 && sym->type > ZBAR_PARTIAL &&
sym->quality < 3) {
/* recycle */
*symp = sym->next;
syms->nsyms--;
sym->next = NULL;
_zbar_image_scanner_recycle_syms(iscn, sym);
}
else
symp = &sym->next;
}
}
if(syms->nsyms && iscn->handler)
iscn->handler(img, iscn->userdata);
svg_close();
return(syms->nsyms);
}
int zbar_scan_image (zbar_image_scanner_t *iscn,
zbar_image_t *img)
{
zbar_symbol_set_t *syms;
const uint8_t *data;
zbar_scanner_t *scn = iscn->scn;
unsigned w, h, cx1, cy1;
int density;
/* timestamp image
* FIXME prefer video timestamp
*/
iscn->time = _zbar_timer_now();
#ifdef ENABLE_QRCODE
_zbar_qr_reset(iscn->qr);
#endif
/* image must be in grayscale format */
if(img->format != fourcc('Y','8','0','0') &&
img->format != fourcc('G','R','E','Y'))
return(-1);
iscn->img = img;
/* recycle previous scanner and image results */
zbar_image_scanner_recycle_image(iscn, img);
syms = iscn->syms;
if(!syms) {
syms = iscn->syms = _zbar_symbol_set_create();
STAT(syms_new);
zbar_symbol_set_ref(syms, 1);
}
else
zbar_symbol_set_ref(syms, 2);
img->syms = syms;
w = img->width;
h = img->height;
cx1 = img->crop_x + img->crop_w;
assert(cx1 <= w);
cy1 = img->crop_y + img->crop_h;
assert(cy1 <= h);
data = img->data;
zbar_image_write_png(img, "debug.png");
svg_open("debug.svg", 0, 0, w, h);
svg_image("debug.png", w, h);
zbar_scanner_new_scan(scn);
density = CFG(iscn, ZBAR_CFG_Y_DENSITY);
if(density > 0) {
const uint8_t *p = data;
int x = 0, y = 0;
int border = (((img->crop_h - 1) % density) + 1) / 2;
if(border > img->crop_h / 2)
border = img->crop_h / 2;
border += img->crop_y;
assert(border <= h);
svg_group_start("scanner", 0, 1, 1, 0, 0);
iscn->dy = 0;
movedelta(img->crop_x, border);
iscn->v = y;
while(y < cy1) {
int cx0 = img->crop_x;;
zprintf(128, "img_x+: %04d,%04d @%p\n", x, y, p);
svg_path_start("vedge", 1. / 32, 0, y + 0.5);
iscn->dx = iscn->du = 1;
iscn->umin = cx0;
while(x < cx1) {
uint8_t d = *p;
movedelta(1, 0);
zbar_scan_y(scn, d);
}
ASSERT_POS;
quiet_border(iscn);
svg_path_end();
movedelta(-1, density);
iscn->v = y;
if(y >= cy1)
break;
zprintf(128, "img_x-: %04d,%04d @%p\n", x, y, p);
svg_path_start("vedge", -1. / 32, w, y + 0.5);
iscn->dx = iscn->du = -1;
iscn->umin = cx1;
while(x >= cx0) {
uint8_t d = *p;
movedelta(-1, 0);
zbar_scan_y(scn, d);
}
ASSERT_POS;
quiet_border(iscn);
svg_path_end();
movedelta(1, density);
iscn->v = y;
}
svg_group_end();
}
iscn->dx = 0;
density = CFG(iscn, ZBAR_CFG_X_DENSITY);
if(density > 0) {
const uint8_t *p = data;
int x = 0, y = 0;
int border = (((img->crop_w - 1) % density) + 1) / 2;
if(border > img->crop_w / 2)
border = img->crop_w / 2;
border += img->crop_x;
assert(border <= w);
svg_group_start("scanner", 90, 1, -1, 0, 0);
movedelta(border, img->crop_y);
iscn->v = x;
while(x < cx1) {
int cy0 = img->crop_y;
zprintf(128, "img_y+: %04d,%04d @%p\n", x, y, p);
svg_path_start("vedge", 1. / 32, 0, x + 0.5);
iscn->dy = iscn->du = 1;
iscn->umin = cy0;
while(y < cy1) {
uint8_t d = *p;
movedelta(0, 1);
zbar_scan_y(scn, d);
}
ASSERT_POS;
quiet_border(iscn);
svg_path_end();
movedelta(density, -1);
iscn->v = x;
if(x >= cx1)
break;
zprintf(128, "img_y-: %04d,%04d @%p\n", x, y, p);
svg_path_start("vedge", -1. / 32, h, x + 0.5);
iscn->dy = iscn->du = -1;
iscn->umin = cy1;
while(y >= cy0) {
uint8_t d = *p;
movedelta(0, -1);
zbar_scan_y(scn, d);
}
ASSERT_POS;
quiet_border(iscn);
svg_path_end();
movedelta(density, 1);
iscn->v = x;
}
svg_group_end();
}
iscn->dy = 0;
iscn->img = NULL;
#ifdef ENABLE_QRCODE
_zbar_qr_decode(iscn->qr, iscn, img);
#endif
/* FIXME tmp hack to filter bad EAN results */
/* FIXME tmp hack to merge simple case EAN add-ons */
char filter = (!iscn->enable_cache &&
(density == 1 || CFG(iscn, ZBAR_CFG_Y_DENSITY) == 1));
int nean = 0, naddon = 0;
if(syms->nsyms) {
zbar_symbol_t **symp;
for(symp = &syms->head; *symp; ) {
zbar_symbol_t *sym = *symp;
if(sym->cache_count <= 0 &&
((sym->type < ZBAR_COMPOSITE && sym->type > ZBAR_PARTIAL) ||
sym->type == ZBAR_DATABAR ||
sym->type == ZBAR_DATABAR_EXP ||
sym->type == ZBAR_CODABAR))
{
if((sym->type == ZBAR_CODABAR || filter) && sym->quality < 4) {
if(iscn->enable_cache) {
/* revert cache update */
zbar_symbol_t *entry = cache_lookup(iscn, sym);
if(entry)
entry->cache_count--;
else
assert(0);
}
/* recycle */
*symp = sym->next;
syms->nsyms--;
sym->next = NULL;
_zbar_image_scanner_recycle_syms(iscn, sym);
continue;
}
else if(sym->type < ZBAR_COMPOSITE &&
sym->type != ZBAR_ISBN10)
{
if(sym->type > ZBAR_EAN5)
nean++;
else
naddon++;
}
}
symp = &sym->next;
}
if(nean == 1 && naddon == 1 && iscn->ean_config) {
/* create container symbol for composite result */
zbar_symbol_t *ean = NULL, *addon = NULL;
for(symp = &syms->head; *symp; ) {
zbar_symbol_t *sym = *symp;
if(sym->type < ZBAR_COMPOSITE && sym->type > ZBAR_PARTIAL) {
/* move to composite */
*symp = sym->next;
syms->nsyms--;
sym->next = NULL;
if(sym->type <= ZBAR_EAN5)
addon = sym;
else
ean = sym;
}
else
symp = &sym->next;
}
assert(ean);
assert(addon);
int datalen = ean->datalen + addon->datalen + 1;
zbar_symbol_t *ean_sym =
_zbar_image_scanner_alloc_sym(iscn, ZBAR_COMPOSITE, datalen);
ean_sym->orient = ean->orient;
ean_sym->syms = _zbar_symbol_set_create();
memcpy(ean_sym->data, ean->data, ean->datalen);
memcpy(ean_sym->data + ean->datalen,
addon->data, addon->datalen + 1);
ean_sym->syms->head = ean;
ean->next = addon;
ean_sym->syms->nsyms = 2;
_zbar_image_scanner_add_sym(iscn, ean_sym);
}
}
if(syms->nsyms && iscn->handler)
iscn->handler(img, iscn->userdata);
svg_close();
return(syms->nsyms);
}
