opj_dinfo_t* OPJ_CALLCONV opj_create_decompress(OPJ_CODEC_FORMAT format) {
opj_dinfo_t *dinfo = (opj_dinfo_t*)opj_malloc(sizeof(opj_dinfo_t));
if(!dinfo) return NULL;
dinfo->is_decompressor = true;
switch(format) {
case CODEC_J2K:
case CODEC_JPT:
/* get a J2K decoder handle */
dinfo->j2k_handle = (void*)j2k_create_decompress((opj_common_ptr)dinfo);
if(!dinfo->j2k_handle) {
opj_free(dinfo);
return NULL;
}
break;
case CODEC_JP2:
/* get a JP2 decoder handle */
dinfo->jp2_handle = (void*)jp2_create_decompress((opj_common_ptr)dinfo);
if(!dinfo->jp2_handle) {
opj_free(dinfo);
return NULL;
}
break;
case CODEC_UNKNOWN:
default:
opj_free(dinfo);
return NULL;
}
dinfo->codec_format = format;
return dinfo;
}
opj_jp2_t* jp2_create_decompress(opj_common_ptr cinfo) {
opj_jp2_t *jp2 = (opj_jp2_t*) opj_calloc(1, sizeof(opj_jp2_t));
if(jp2) {
jp2->cinfo = cinfo;
/* create the J2K codec */
jp2->j2k = j2k_create_decompress(cinfo);
if(jp2->j2k == NULL) {
jp2_destroy_decompress(jp2);
return NULL;
}
}
return jp2;
}
opj_codec_t* OPJ_CALLCONV opj_create_decompress(OPJ_CODEC_FORMAT p_format)
{
opj_codec_private_t *l_info = 00;
l_info = (opj_codec_private_t*) opj_calloc(1, sizeof(opj_codec_private_t));
if
(!l_info)
{
return 00;
}
memset(l_info, 0, sizeof(opj_codec_private_t));
l_info->is_decompressor = 1;
switch
(p_format)
{
case CODEC_J2K:
l_info->m_codec_data.m_decompression.opj_decode = (opj_image_t* (*) (void *, struct opj_stream_private *, struct opj_event_mgr * ))j2k_decode;
l_info->m_codec_data.m_decompression.opj_end_decompress = (bool (*) (void *,struct opj_stream_private *,struct opj_event_mgr *))j2k_end_decompress;
l_info->m_codec_data.m_decompression.opj_read_header = (bool (*) (
void *,
opj_image_t **,
OPJ_INT32 * ,
OPJ_INT32 * ,
OPJ_UINT32 * ,
OPJ_UINT32 * ,
OPJ_UINT32 * ,
OPJ_UINT32 * ,
struct opj_stream_private *,
struct opj_event_mgr * )) j2k_read_header;
l_info->m_codec_data.m_decompression.opj_destroy = (void (*) (void *))j2k_destroy;
l_info->m_codec_data.m_decompression.opj_setup_decoder = (void (*) (void * ,opj_dparameters_t * )) j2k_setup_decoder;
l_info->m_codec_data.m_decompression.opj_read_tile_header = (bool (*) (
void *,
OPJ_UINT32*,
OPJ_UINT32*,
OPJ_INT32 * ,
OPJ_INT32 * ,
OPJ_INT32 * ,
OPJ_INT32 * ,
OPJ_UINT32 * ,
bool *,
struct opj_stream_private *,
struct opj_event_mgr * )) j2k_read_tile_header;
l_info->m_codec_data.m_decompression.opj_decode_tile_data = (bool (*) (void *,OPJ_UINT32,OPJ_BYTE*,OPJ_UINT32,struct opj_stream_private *, struct opj_event_mgr * )) j2k_decode_tile;
l_info->m_codec_data.m_decompression.opj_set_decode_area = (bool (*) (void *,OPJ_INT32,OPJ_INT32,OPJ_INT32,OPJ_INT32, struct opj_event_mgr * )) j2k_set_decode_area;
l_info->m_codec = j2k_create_decompress();
if
(! l_info->m_codec)
{
opj_free(l_info);
return 00;
}
break;
case CODEC_JP2:
/* get a JP2 decoder handle */
l_info->m_codec_data.m_decompression.opj_decode = (opj_image_t* (*) (void *, struct opj_stream_private *, struct opj_event_mgr * ))jp2_decode;
l_info->m_codec_data.m_decompression.opj_end_decompress = (bool (*) (void *,struct opj_stream_private *,struct opj_event_mgr *)) jp2_end_decompress;
l_info->m_codec_data.m_decompression.opj_read_header = (bool (*) (
void *,
opj_image_t **,
OPJ_INT32 * ,
OPJ_INT32 * ,
OPJ_UINT32 * ,
OPJ_UINT32 * ,
OPJ_UINT32 * ,
OPJ_UINT32 * ,
struct opj_stream_private *,
struct opj_event_mgr * )) jp2_read_header;
l_info->m_codec_data.m_decompression.opj_read_tile_header = (
bool (*) (
void *,
OPJ_UINT32*,
OPJ_UINT32*,
OPJ_INT32*,
OPJ_INT32*,
OPJ_INT32 * ,
OPJ_INT32 * ,
OPJ_UINT32 * ,
bool *,
struct opj_stream_private *,
struct opj_event_mgr * )) jp2_read_tile_header;
l_info->m_codec_data.m_decompression.opj_decode_tile_data = (bool (*) (void *,OPJ_UINT32,OPJ_BYTE*,OPJ_UINT32,struct opj_stream_private *, struct opj_event_mgr * )) jp2_decode_tile;
l_info->m_codec_data.m_decompression.opj_destroy = (void (*) (void *))jp2_destroy;
l_info->m_codec_data.m_decompression.opj_setup_decoder = (void (*) (void * ,opj_dparameters_t * )) jp2_setup_decoder;
l_info->m_codec_data.m_decompression.opj_set_decode_area = (bool (*) (void *,OPJ_INT32,OPJ_INT32,OPJ_INT32,OPJ_INT32, struct opj_event_mgr * )) jp2_set_decode_area;
l_info->m_codec = jp2_create(true);
if
(! l_info->m_codec)
{
opj_free(l_info);
return 00;
}
break;
case CODEC_UNKNOWN:
case CODEC_JPT:
default:
opj_free(l_info);
return 00;
}
set_default_event_handler(&(l_info->m_event_mgr));
return (opj_codec_t*) l_info;
}
