void OPJ_CALLCONV opj_setup_encoder(opj_cinfo_t *cinfo, opj_cparameters_t *parameters, opj_image_t *image) {
if(cinfo && parameters && image) {
switch(cinfo->codec_format) {
case CODEC_J2K:
j2k_setup_encoder((opj_j2k_t*)cinfo->j2k_handle, parameters, image);
break;
case CODEC_JP2:
jp2_setup_encoder((opj_jp2_t*)cinfo->jp2_handle, parameters, image);
break;
case CODEC_JPT:
case CODEC_UNKNOWN:
default:
break;
}
}
}
void jp2_setup_encoder(opj_jp2_t *jp2, opj_cparameters_t *parameters, opj_image_t *image) {
int i;
int depth_0, sign;
if(!jp2 || !parameters || !image)
return;
/* setup the J2K codec */
/* ------------------- */
/* Check if number of components respects standard */
if (image->numcomps < 1 || image->numcomps > 16384) {
opj_event_msg(jp2->cinfo, EVT_ERROR, "Invalid number of components specified while setting up JP2 encoder\n");
return;
}
j2k_setup_encoder(jp2->j2k, parameters, image);
/* setup the JP2 codec */
/* ------------------- */
/* Profile box */
jp2->brand = JP2_JP2; /* BR */
jp2->minversion = 0; /* MinV */
jp2->numcl = 1;
jp2->cl = (unsigned int*) opj_malloc(jp2->numcl * sizeof(unsigned int));
jp2->cl[0] = JP2_JP2; /* CL0 : JP2 */
/* Image Header box */
jp2->numcomps = image->numcomps; /* NC */
jp2->comps = (opj_jp2_comps_t*) opj_malloc(jp2->numcomps * sizeof(opj_jp2_comps_t));
jp2->h = image->y1 - image->y0; /* HEIGHT */
jp2->w = image->x1 - image->x0; /* WIDTH */
/* BPC */
depth_0 = image->comps[0].prec - 1;
sign = image->comps[0].sgnd;
jp2->bpc = depth_0 + (sign << 7);
for (i = 1; i < image->numcomps; i++) {
int depth = image->comps[i].prec - 1;
sign = image->comps[i].sgnd;
if (depth_0 != depth)
jp2->bpc = 255;
}
jp2->C = 7; /* C : Always 7 */
jp2->UnkC = 0; /* UnkC, colorspace specified in colr box */
jp2->IPR = 0; /* IPR, no intellectual property */
/* BitsPerComponent box */
for (i = 0; i < image->numcomps; i++) {
jp2->comps[i].bpcc = image->comps[i].prec - 1 + (image->comps[i].sgnd << 7);
}
jp2->meth = 1;
if (image->color_space == 1)
jp2->enumcs = 16; /* sRGB as defined by IEC 61966-2.1 */
else if (image->color_space == 2)
jp2->enumcs = 17; /* greyscale */
else if (image->color_space == 3)
jp2->enumcs = 18; /* YUV */
jp2->precedence = 0; /* PRECEDENCE */
jp2->approx = 0; /* APPROX */
}
