walkero
/
openjpeg
1
0
Fork 0
Code Issues Pull Requests Projects Releases 1 Wiki Activity

[trunk] WIP: add a read CBD marker function (JPEG2000 part 2)

This commit is contained in:
Mickael Savinaud 2011-10-12 14:36:39 +00:00
parent aeabfaf417
commit 195190b612
2 changed files with 62 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
CHANGES
View File

@ -6,6 +6,7 @@ What's New for OpenJPEG
+ : added
October 12, 2011
+ [mickael] WIP: add a read CBD marker function (JPEG2000 part 2)
+ [mickael] WIP: add a read MCO marker function (JPEG2000 part 2)
+ [mickael] WIP: add a read MCC marker function (JPEG2000 part 2)
+ [mickael] WIP: add a read MCT marker function (JPEG2000 part 2)

63
libopenjpeg/j2k.c
View File

@ -755,6 +755,17 @@ static void j2k_write_float_to_int32 (const void * p_src_data, void * p_dest_da
static void j2k_write_float_to_float (const void * p_src_data, void * p_dest_data, OPJ_UINT32 p_nb_elem);
static void j2k_write_float_to_float64 (const void * p_src_data, void * p_dest_data, OPJ_UINT32 p_nb_elem);
/**
* Reads a CBD marker (Component bit depth definition)
* @param p_header_data the data contained in the CBD box.
* @param p_j2k the jpeg2000 codec.
* @param p_header_size the size of the data contained in the CBD marker.
* @param p_manager the user event manager.
*/
static opj_bool j2k_read_cbd ( opj_j2k_v2_t *p_j2k,
OPJ_BYTE * p_header_data,
OPJ_UINT32 p_header_size,
struct opj_event_mgr * p_manager);
/**
@ -887,8 +898,8 @@ const opj_dec_memory_marker_handler_t j2k_memory_marker_handler_tab [] =
{J2K_MS_CRG, J2K_STATE_MH, j2k_read_crg_v2},
{J2K_MS_COM, J2K_STATE_MH | J2K_STATE_TPH, j2k_read_com_v2},
{J2K_MS_MCT, J2K_STATE_MH | J2K_STATE_TPH, j2k_read_mct},
/*FIXME MSD {J2K_MS_CBD, J2K_STATE_MH , j2k_read_cbd},
*/{J2K_MS_MCC, J2K_STATE_MH | J2K_STATE_TPH, j2k_read_mcc},
{J2K_MS_CBD, J2K_STATE_MH , j2k_read_cbd},
{J2K_MS_MCC, J2K_STATE_MH | J2K_STATE_TPH, j2k_read_mcc},
{J2K_MS_MCO, J2K_STATE_MH | J2K_STATE_TPH, j2k_read_mco},
#ifdef USE_JPWL
#ifdef TODO_MS /* FIXME */
@ -4807,6 +4818,54 @@ opj_bool j2k_add_mct(opj_tcp_v2_t * p_tcp, opj_image_t * p_image, OPJ_UINT32 p_i
return OPJ_TRUE;
}
/**
* Reads a CBD marker (Component bit depth definition)
* @param p_header_data the data contained in the CBD box.
* @param p_j2k the jpeg2000 codec.
* @param p_header_size the size of the data contained in the CBD marker.
* @param p_manager the user event manager.
*/
opj_bool j2k_read_cbd ( opj_j2k_v2_t *p_j2k,
OPJ_BYTE * p_header_data,
OPJ_UINT32 p_header_size,
struct opj_event_mgr * p_manager)
{
OPJ_UINT32 l_nb_comp,l_num_comp;
OPJ_UINT32 l_comp_def;
OPJ_UINT32 i;
opj_image_comp_t * l_comp = 00;
/* preconditions */
assert(p_header_data != 00);
assert(p_j2k != 00);
assert(p_manager != 00);
l_num_comp = p_j2k->m_image->numcomps;
if (p_header_size != (p_j2k->m_image->numcomps + 2)) {
opj_event_msg_v2(p_manager, EVT_ERROR, "Crror reading CBD marker\n");
return OPJ_FALSE;
}
opj_read_bytes(p_header_data,&l_nb_comp,2); /* Ncbd */
p_header_data+=2;
if (l_nb_comp != l_num_comp) {
opj_event_msg_v2(p_manager, EVT_ERROR, "Crror reading CBD marker\n");
return OPJ_FALSE;
}
l_comp = p_j2k->m_image->comps;
for (i=0;i<l_num_comp;++i) {
opj_read_bytes(p_header_data,&l_comp_def,1); /* Component bit depth */
++p_header_data;
l_comp->sgnd = (l_comp_def>>7) & 1;
l_comp->prec = (l_comp_def&0x7f) + 1;
++l_comp;
}
return OPJ_TRUE;
}
/* ----------------------------------------------------------------------- */