return OPJ_TRUE;
}
+static OPJ_BOOL opj_j2k_update_image_dimensions(opj_image_t* p_image,
+ opj_event_mgr_t * p_manager)
+{
+ OPJ_UINT32 it_comp;
+ OPJ_INT32 l_comp_x1, l_comp_y1;
+ opj_image_comp_t* l_img_comp = NULL;
+
+ l_img_comp = p_image->comps;
+ for (it_comp = 0; it_comp < p_image->numcomps; ++it_comp) {
+ OPJ_INT32 l_h, l_w;
+
+ l_img_comp->x0 = (OPJ_UINT32)opj_int_ceildiv((OPJ_INT32)p_image->x0,
+ (OPJ_INT32)l_img_comp->dx);
+ l_img_comp->y0 = (OPJ_UINT32)opj_int_ceildiv((OPJ_INT32)p_image->y0,
+ (OPJ_INT32)l_img_comp->dy);
+ l_comp_x1 = opj_int_ceildiv((OPJ_INT32)p_image->x1, (OPJ_INT32)l_img_comp->dx);
+ l_comp_y1 = opj_int_ceildiv((OPJ_INT32)p_image->y1, (OPJ_INT32)l_img_comp->dy);
+
+ l_w = opj_int_ceildivpow2(l_comp_x1, (OPJ_INT32)l_img_comp->factor)
+ - opj_int_ceildivpow2((OPJ_INT32)l_img_comp->x0, (OPJ_INT32)l_img_comp->factor);
+ if (l_w < 0) {
+ opj_event_msg(p_manager, EVT_ERROR,
+ "Size x of the decoded component image is incorrect (comp[%d].w=%d).\n",
+ it_comp, l_w);
+ return OPJ_FALSE;
+ }
+ l_img_comp->w = (OPJ_UINT32)l_w;
+
+ l_h = opj_int_ceildivpow2(l_comp_y1, (OPJ_INT32)l_img_comp->factor)
+ - opj_int_ceildivpow2((OPJ_INT32)l_img_comp->y0, (OPJ_INT32)l_img_comp->factor);
+ if (l_h < 0) {
+ opj_event_msg(p_manager, EVT_ERROR,
+ "Size y of the decoded component image is incorrect (comp[%d].h=%d).\n",
+ it_comp, l_h);
+ return OPJ_FALSE;
+ }
+ l_img_comp->h = (OPJ_UINT32)l_h;
+
+ l_img_comp++;
+ }
+
+ return OPJ_TRUE;
+}
+
+
OPJ_BOOL opj_j2k_set_decode_area(opj_j2k_t *p_j2k,
opj_image_t* p_image,
OPJ_INT32 p_start_x, OPJ_INT32 p_start_y,
{
opj_cp_t * l_cp = &(p_j2k->m_cp);
opj_image_t * l_image = p_j2k->m_private_image;
-
+ OPJ_BOOL ret;
OPJ_UINT32 it_comp;
- OPJ_INT32 l_comp_x1, l_comp_y1;
- opj_image_comp_t* l_img_comp = NULL;
/* Check if we are read the main header */
if (p_j2k->m_specific_param.m_decoder.m_state != J2K_STATE_TPHSOT) {
return OPJ_FALSE;
}
+ /* Update the comps[].factor member of the output image with the one */
+ /* of m_reduce */
+ for (it_comp = 0; it_comp < p_image->numcomps; ++it_comp) {
+ p_image->comps[it_comp].factor = p_j2k->m_cp.m_specific_param.m_dec.m_reduce;
+ }
+
if (!p_start_x && !p_start_y && !p_end_x && !p_end_y) {
opj_event_msg(p_manager, EVT_INFO,
"No decoded area parameters, set the decoded area to the whole image\n");
p_j2k->m_specific_param.m_decoder.m_end_tile_x = l_cp->tw;
p_j2k->m_specific_param.m_decoder.m_end_tile_y = l_cp->th;
- return OPJ_TRUE;
+ p_image->x0 = l_image->x0;
+ p_image->y0 = l_image->y0;
+ p_image->x1 = l_image->x1;
+ p_image->y1 = l_image->y1;
+
+ return opj_j2k_update_image_dimensions(p_image, p_manager);
}
/* ----- */
p_j2k->m_specific_param.m_decoder.m_discard_tiles = 1;
- l_img_comp = p_image->comps;
- for (it_comp = 0; it_comp < p_image->numcomps; ++it_comp) {
- OPJ_INT32 l_h, l_w;
-
- l_img_comp->x0 = (OPJ_UINT32)opj_int_ceildiv((OPJ_INT32)p_image->x0,
- (OPJ_INT32)l_img_comp->dx);
- l_img_comp->y0 = (OPJ_UINT32)opj_int_ceildiv((OPJ_INT32)p_image->y0,
- (OPJ_INT32)l_img_comp->dy);
- l_comp_x1 = opj_int_ceildiv((OPJ_INT32)p_image->x1, (OPJ_INT32)l_img_comp->dx);
- l_comp_y1 = opj_int_ceildiv((OPJ_INT32)p_image->y1, (OPJ_INT32)l_img_comp->dy);
-
- l_w = opj_int_ceildivpow2(l_comp_x1, (OPJ_INT32)l_img_comp->factor)
- - opj_int_ceildivpow2((OPJ_INT32)l_img_comp->x0, (OPJ_INT32)l_img_comp->factor);
- if (l_w < 0) {
- opj_event_msg(p_manager, EVT_ERROR,
- "Size x of the decoded component image is incorrect (comp[%d].w=%d).\n",
- it_comp, l_w);
- return OPJ_FALSE;
- }
- l_img_comp->w = (OPJ_UINT32)l_w;
-
- l_h = opj_int_ceildivpow2(l_comp_y1, (OPJ_INT32)l_img_comp->factor)
- - opj_int_ceildivpow2((OPJ_INT32)l_img_comp->y0, (OPJ_INT32)l_img_comp->factor);
- if (l_h < 0) {
- opj_event_msg(p_manager, EVT_ERROR,
- "Size y of the decoded component image is incorrect (comp[%d].h=%d).\n",
- it_comp, l_h);
- return OPJ_FALSE;
- }
- l_img_comp->h = (OPJ_UINT32)l_h;
+ ret = opj_j2k_update_image_dimensions(p_image, p_manager);
- l_img_comp++;
+ if (ret) {
+ opj_event_msg(p_manager, EVT_INFO, "Setting decoding area to %d,%d,%d,%d\n",
+ p_image->x0, p_image->y0, p_image->x1, p_image->y1);
}
- opj_event_msg(p_manager, EVT_INFO, "Setting decoding area to %d,%d,%d,%d\n",
- p_image->x0, p_image->y0, p_image->x1, p_image->y1);
-
- return OPJ_TRUE;
+ return ret;
}
opj_j2k_t* opj_j2k_create_decompress(void)
return OPJ_FALSE;
}
+ /* Heuristics to detect sequence opj_read_header(), opj_set_decoded_resolution_factor() */
+ /* and finally opj_decode_image() without manual setting of comps[].factor */
+ /* We could potentially always execute it, if we don't allow people to do */
+ /* opj_read_header(), modify x0,y0,x1,y1 of returned image an call opj_decode_image() */
+ if (p_j2k->m_cp.m_specific_param.m_dec.m_reduce > 0 &&
+ p_j2k->m_private_image != NULL &&
+ p_j2k->m_private_image->numcomps > 0 &&
+ p_j2k->m_private_image->comps[0].factor ==
+ p_j2k->m_cp.m_specific_param.m_dec.m_reduce &&
+ p_image->numcomps > 0 &&
+ p_image->comps[0].factor == 0 &&
+ /* Don't mess with image dimension if the user has allocated it */
+ p_image->comps[0].data == NULL) {
+ OPJ_UINT32 it_comp;
+
+ /* Update the comps[].factor member of the output image with the one */
+ /* of m_reduce */
+ for (it_comp = 0; it_comp < p_image->numcomps; ++it_comp) {
+ p_image->comps[it_comp].factor = p_j2k->m_cp.m_specific_param.m_dec.m_reduce;
+ }
+ if (!opj_j2k_update_image_dimensions(p_image, p_manager)) {
+ return OPJ_FALSE;
+ }
+ }
+
p_j2k->m_output_image = opj_image_create0();
if (!(p_j2k->m_output_image)) {
return OPJ_FALSE;
projects / openjpeg.git / blobdiff