+
+void jp2_destroy_compress(opj_jp2_t *jp2) {
+ if(jp2) {
+ /* destroy the J2K codec */
+ j2k_destroy_compress(jp2->j2k);
+
+ if(jp2->comps) {
+ opj_free(jp2->comps);
+ }
+ if(jp2->cl) {
+ opj_free(jp2->cl);
+ }
+ opj_free(jp2);
+ }
+}
+
+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 */
+ /* ------------------- */
+
+ 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);
+ }
+
+ /* Colour Specification box */
+
+ if ((image->numcomps == 1 || image->numcomps == 3) && (jp2->bpc != 255)) {
+ jp2->meth = 1; /* METH: Enumerated colourspace */
+ } else {
+ jp2->meth = 2; /* METH: Restricted ICC profile */
+ }
+ if (jp2->meth == 1) {
+ if (image->color_space == 1)
+ jp2->enumcs = 16; /* sRGB as defined by IEC 61966\962\961 */
+ else if (image->color_space == 2)
+ jp2->enumcs = 17; /* greyscale */
+ else if (image->color_space == 3)
+ jp2->enumcs = 18; /* YUV */
+ } else {
+ jp2->enumcs = 0; /* PROFILE (??) */
+ }
+ jp2->precedence = 0; /* PRECEDENCE */
+ jp2->approx = 0; /* APPROX */
+
+}
+
+bool jp2_encode(opj_jp2_t *jp2, opj_cio_t *cio, opj_image_t *image, char *index) {
+
+ /* JP2 encoding */
+
+ /* JPEG 2000 Signature box */
+ jp2_write_jp(cio);
+ /* File Type box */
+ jp2_write_ftyp(jp2, cio);
+ /* JP2 Header box */
+ jp2_write_jp2h(jp2, cio);
+
+ /* J2K encoding */
+
+ if(!jp2_write_jp2c(jp2, cio, image, index)) {
+ opj_event_msg(jp2->cinfo, EVT_ERROR, "Failed to encode image\n");
+ return false;
+ }
+
+ return true;
+}
+
+