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 */ }