opj_image_t* jp2_decode(opj_jp2_t *jp2, opj_cio_t *cio, opj_codestream_info_t *cstr_info) {
opj_common_ptr cinfo;
opj_image_t *image = NULL;
if(!jp2 || !cio) {
return NULL;
}
cinfo = jp2->cinfo;
/* JP2 decoding */
if(!jp2_read_struct(jp2, cio)) {
opj_event_msg(cinfo, EVT_ERROR, "Failed to decode jp2 structure\n");
return NULL;
}
/* J2K decoding */
image = j2k_decode(jp2->j2k, cio, cstr_info);
if(!image) {
opj_event_msg(cinfo, EVT_ERROR, "Failed to decode J2K image\n");
return NULL;
}
/* Set Image Color Space */
if (jp2->enumcs == 16)
image->color_space = CLRSPC_SRGB;
else if (jp2->enumcs == 17)
image->color_space = CLRSPC_GRAY;
else if (jp2->enumcs == 18)
image->color_space = CLRSPC_SYCC;
else
image->color_space = CLRSPC_UNKNOWN;
return image;
}
opj_image_t* jp2_decode(opj_jp2_t *jp2, opj_cio_t *cio) {
opj_common_ptr cinfo;
opj_image_t *image = NULL;
if(!jp2 || !cio) {
return NULL;
}
cinfo = jp2->cinfo;
/* JP2 decoding */
if(!jp2_read_struct(jp2, cio)) {
opj_event_msg(cinfo, EVT_ERROR, "Failed to decode jp2 structure\n");
return NULL;
}
/* J2K decoding */
image = j2k_decode(jp2->j2k, cio);
if(!image) {
opj_event_msg(cinfo, EVT_ERROR, "Failed to decode J2K image\n");
}
return image;
}
opj_image_t* opj_jp2_decode(opj_jp2_t *jp2, opj_cio_t *cio,
opj_codestream_info_t *cstr_info)
{
opj_common_ptr cinfo;
opj_image_t *image = NULL;
opj_jp2_color_t color;
if(!jp2 || !cio)
{
return NULL;
}
memset(&color, 0, sizeof(opj_jp2_color_t));
cinfo = jp2->cinfo;
/* JP2 decoding */
if(!jp2_read_struct(jp2, cio, &color))
{
free_color_data(&color);
opj_event_msg(cinfo, EVT_ERROR, "Failed to decode jp2 structure\n");
return NULL;
}
/* J2K decoding */
image = j2k_decode(jp2->j2k, cio, cstr_info);
if(!image)
{
free_color_data(&color);
opj_event_msg(cinfo, EVT_ERROR, "Failed to decode J2K image\n");
return NULL;
}
if (!jp2->ignore_pclr_cmap_cdef){
/* Set Image Color Space */
if (jp2->enumcs == 16)
image->color_space = CLRSPC_SRGB;
else if (jp2->enumcs == 17)
image->color_space = CLRSPC_GRAY;
else if (jp2->enumcs == 18)
image->color_space = CLRSPC_SYCC;
else
image->color_space = CLRSPC_UNKNOWN;
if(color.jp2_cdef)
{
jp2_apply_cdef(image, &color);
}
if(color.jp2_pclr)
{
/* Part 1, I.5.3.4: Either both or none : */
if( !color.jp2_pclr->cmap)
jp2_free_pclr(&color);
else
jp2_apply_pclr(&color, image, cinfo);
}
if(color.icc_profile_buf)
{
image->icc_profile_buf = color.icc_profile_buf;
color.icc_profile_buf = NULL;
image->icc_profile_len = color.icc_profile_len;
}
}
return image;
}/* opj_jp2_decode() */
