/* Start scanning */
SANE_Status
sane_start (SANE_Handle handle)
{
struct scanner *s = (struct scanner *) handle;
SANE_Status st = SANE_STATUS_GOOD;
int duplex = s->val[DUPLEX].w, i;
unsigned data_avalible;
int start = 0;
if (s->thread)
{
pthread_join (s->thread, NULL);
s->thread = 0;
}
if (!s->scanning)
{
st = kvs40xx_test_unit_ready (s);
if (st)
return st;
st = wait_document (s);
if (st)
return st;
st = kvs40xx_reset_window (s);
if (st)
return st;
st = kvs40xx_set_window (s, SIDE_FRONT);
if (st)
return st;
if (duplex)
{
st = kvs40xx_set_window (s, SIDE_BACK);
if (st)
return st;
}
st = scan (s);
if (st)
return st;
if (s->val[CROP].b || s->val[LENGTHCTL].b || s->val[LONG_PAPER].b)
{
unsigned w, h, res = s->val[RESOLUTION].w;
SANE_Parameters *p = &s->params;
w = 297; /*A3 */
h = 420;
p->pixels_per_line = w * res / 25.4 + .5;
p->lines = h * res / 25.4 + .5;
}
else
{
st = kvs40xx_read_picture_element (s, SIDE_FRONT, &s->params);
if (st)
return st;
}
start = 1;
s->scanning = 1;
s->page = 0;
s->read = 0;
s->side = SIDE_FRONT;
sane_get_parameters (s, NULL);
}
if (duplex && s->side == SIDE_FRONT && !start)
{
s->side = SIDE_BACK;
s->read = 0;
return SANE_STATUS_GOOD;
}
do {
st = get_buffer_status(s, &data_avalible);
if (st)
goto err;
} while (!data_avalible);
for (i = 0; i < (duplex ? 2 : 1); i++)
{
st = buf_init (&s->buf[i], s->side_size);
if (st)
goto err;
}
if (pthread_create (&s->thread, NULL, (void *(*)(void *)) read_data, s))
{
st = SANE_STATUS_IO_ERROR;
goto err;
}
if (s->val[CROP].b || s->val[LENGTHCTL].b || s->val[LONG_PAPER].b)
{
pthread_join (s->thread, NULL);
s->thread = 0;
}
return SANE_STATUS_GOOD;
err:
s->scanning = 0;
return st;
}
/* Start scanning */
SANE_Status
sane_start (SANE_Handle handle)
{
struct scanner *s = (struct scanner *) handle;
SANE_Status st;
int duplex = s->val[DUPLEX].w;
if (!s->scanning)
{
unsigned dummy_length;
st = kvs20xx_test_unit_ready (s);
if (st)
return st;
st = wait_document (s);
if (st)
return st;
st = kvs20xx_reset_window (s);
if (st)
return st;
st = kvs20xx_set_window (s, SIDE_FRONT);
if (st)
return st;
if (duplex)
{
st = kvs20xx_set_window (s, SIDE_BACK);
if (st)
return st;
}
st = kvs20xx_scan (s);
if (st)
return st;
st = kvs20xx_read_picture_element (s, SIDE_FRONT, &s->params);
if (st)
return st;
if (duplex)
{
st = get_adjust_data (s, &dummy_length);
if (st)
return st;
}
else
{
dummy_length = 0;
}
s->scanning = 1;
s->page = 0;
s->read = 0;
s->side = SIDE_FRONT;
sane_get_parameters (s, NULL);
s->saved_dummy_size = s->dummy_size = dummy_length
? (dummy_length * s->val[RESOLUTION].w / 1200 - 1)
* s->params.bytes_per_line : 0;
s->side_size = s->params.lines * s->params.bytes_per_line;
s->data = realloc (s->data, duplex ? s->side_size * 2 : s->side_size);
if (!s->data)
{
s->scanning = 0;
return SANE_STATUS_NO_MEM;
}
}
if (duplex)
{
unsigned side = SIDE_FRONT;
unsigned read, mx;
if (s->side == SIDE_FRONT && s->read == s->side_size - s->dummy_size)
{
s->side = SIDE_BACK;
s->read = s->dummy_size;
s->dummy_size = 0;
return SANE_STATUS_GOOD;
}
s->read = 0;
s->dummy_size = s->saved_dummy_size;
s->side = SIDE_FRONT;
st = kvs20xx_document_exist (s);
if (st)
return st;
for (mx = s->side_size * 2; !st; mx -= read, side ^= SIDE_BACK)
st = kvs20xx_read_image_data (s, s->page, side,
&s->data[s->side_size * 2 - mx], mx,
&read);
}
else
{
unsigned read, mx;
s->read = 0;
st = kvs20xx_document_exist (s);
if (st)
return st;
DBG (DBG_INFO, "start: %d\n", s->page);
for (mx = s->side_size; !st; mx -= read)
st = kvs20xx_read_image_data (s, s->page, SIDE_FRONT,
&s->data[s->side_size - mx], mx, &read);
}
if (st && st != SANE_STATUS_EOF)
{
s->scanning = 0;
return st;
}
s->page++;
return SANE_STATUS_GOOD;
}
