diff --git a/core/src/fxcodec/fx_libopenjpeg/libopenjpeg20/j2k.c b/core/src/fxcodec/fx_libopenjpeg/libopenjpeg20/j2k.c
index 93f8a3d..66db53b 100644
--- a/core/src/fxcodec/fx_libopenjpeg/libopenjpeg20/j2k.c
+++ b/core/src/fxcodec/fx_libopenjpeg/libopenjpeg20/j2k.c
@@ -7090,6 +7090,9 @@
         OPJ_UINT32 l_current_marker;
         OPJ_UINT32 l_marker_size;
         const opj_dec_memory_marker_handler_t * l_marker_handler = 00;
+        OPJ_BOOL l_has_siz = 0;
+        OPJ_BOOL l_has_cod = 0;
+        OPJ_BOOL l_has_qcd = 0;
 
         /* preconditions */
         assert(p_stream != 00);
@@ -7139,6 +7142,19 @@
                                 l_marker_handler = opj_j2k_get_marker_handler(l_current_marker);
                 }
 
+                if (l_marker_handler->id == J2K_MS_SIZ) {
+                    /* Mark required SIZ marker as found */
+                    l_has_siz = 1;
+                }
+                if (l_marker_handler->id == J2K_MS_COD) {
+                    /* Mark required COD marker as found */
+                    l_has_cod = 1;
+                }
+                if (l_marker_handler->id == J2K_MS_QCD) {
+                    /* Mark required QCD marker as found */
+                    l_has_qcd = 1;
+                }
+
                 /* Check if the marker is known and if it is the right place to find it */
                 if (! (p_j2k->m_specific_param.m_decoder.m_state & l_marker_handler->states) ) {
                         opj_event_msg(p_manager, EVT_ERROR, "Marker is not compliant with its position\n");
@@ -7201,6 +7217,19 @@
                 opj_read_bytes(p_j2k->m_specific_param.m_decoder.m_header_data,&l_current_marker,2);
         }
 
+        if (l_has_siz == 0) {
+            opj_event_msg(p_manager, EVT_ERROR, "required SIZ marker not found in main header\n");
+            return OPJ_FALSE;
+        }
+        if (l_has_cod == 0) {
+            opj_event_msg(p_manager, EVT_ERROR, "required COD marker not found in main header\n");
+            return OPJ_FALSE;
+        }
+        if (l_has_qcd == 0) {
+            opj_event_msg(p_manager, EVT_ERROR, "required QCD marker not found in main header\n");
+            return OPJ_FALSE;
+        }
+
         opj_event_msg(p_manager, EVT_INFO, "Main header has been correctly decoded.\n");
 
         /* Position of the last element if the main header */
diff --git a/core/src/fxcodec/fx_libopenjpeg/libopenjpeg20/tcd.c b/core/src/fxcodec/fx_libopenjpeg/libopenjpeg20/tcd.c
index 7dd93e9..1720b8e 100644
--- a/core/src/fxcodec/fx_libopenjpeg/libopenjpeg20/tcd.c
+++ b/core/src/fxcodec/fx_libopenjpeg/libopenjpeg20/tcd.c
@@ -676,7 +676,7 @@
         /*tile->numcomps = image->numcomps; */                      \
         for(compno = 0; compno < l_tile->numcomps; ++compno) {      \
                 /*fprintf(stderr, "compno = %d/%d\n", compno, l_tile->numcomps);*/                                                                                                                                \
-                                                                    \
+                l_image_comp->resno_decoded = 0;                                                    \
                 /* border of each l_tile component (global) */      \
                 l_tilec->x0 = opj_int_ceildiv(l_tile->x0, (OPJ_INT32)l_image_comp->dx);                                                                                                                                          \
                 l_tilec->y0 = opj_int_ceildiv(l_tile->y0, (OPJ_INT32)l_image_comp->dy);                                                                                                                                          \
@@ -970,15 +970,14 @@
                                                 OPJ_INT32 cblkxend = cblkxstart + (1 << cblkwidthexpn);                                                                                                           \
                                                 OPJ_INT32 cblkyend = cblkystart + (1 << cblkheightexpn);                                                                                                          \
                                                                                                                                                                                                                   \
+                                                if (! FUNCTION_ELEMENT(l_code_block)) {                                                                                                                           \
+                                                        return OPJ_FALSE;                                                                                                                                         \
+                                                }                                                                                                                                                                 \
                                                 /* code-block size (global) */                                                                                                                                    \
                                                 l_code_block->x0 = opj_int_max(cblkxstart, l_current_precinct->x0);                                                                                                   \
                                                 l_code_block->y0 = opj_int_max(cblkystart, l_current_precinct->y0);                                                                                                   \
                                                 l_code_block->x1 = opj_int_min(cblkxend, l_current_precinct->x1);                                                                                                     \
                                                 l_code_block->y1 = opj_int_min(cblkyend, l_current_precinct->y1);                                                                                                     \
-                                                                                                                                                                                                                  \
-                                                if (! FUNCTION_ELEMENT(l_code_block)) {                                                                                                                           \
-                                                        return OPJ_FALSE;                                                                                                                                         \
-                                                }                                                                                                                                                                 \
                                                 ++l_code_block;                                                                                                                                                   \
                                         }                                                                                                                                                                         \
                                         ++l_current_precinct;                                                                                                                                                     \
@@ -1054,9 +1053,19 @@
 
                 p_code_block->m_current_max_segs = OPJ_J2K_DEFAULT_NB_SEGS;
                 /*fprintf(stderr, "m_current_max_segs of code_block->data = %d\n", p_code_block->m_current_max_segs);*/
-        }
-        /* TODO */
-        /*p_code_block->numsegs = 0; */
+        } else {
+					/* sanitize */
+					OPJ_BYTE* l_data = p_code_block->data;
+					OPJ_UINT32 l_data_max_size = p_code_block->data_max_size;
+					opj_tcd_seg_t * l_segs = p_code_block->segs;
+					OPJ_UINT32 l_current_max_segs = p_code_block->m_current_max_segs;
+
+					memset(p_code_block, 0, sizeof(opj_tcd_cblk_dec_t));
+					p_code_block->data = l_data;
+					p_code_block->data_max_size = l_data_max_size;
+					p_code_block->segs = l_segs;
+					p_code_block->m_current_max_segs = l_current_max_segs;
+				}
 
         return OPJ_TRUE;
 }