-
- /* XXX: libdcp should probably use boost */
-
- double matrix[3][3];
- for (int i = 0; i < 3; ++i) {
- for (int j = 0; j < 3; ++j) {
- matrix[i][j] = _frame->colour_conversion().matrix (i, j);
- }
- }
-
- shared_ptr<dcp::XYZFrame> xyz = dcp::rgb_to_xyz (
- _frame->image (_burn_subtitles),
- in_lut,
- dcp::GammaLUT::cache.get (16, 1 / _frame->colour_conversion().output_gamma, false),
- matrix
- );
-
- /* Set the max image and component sizes based on frame_rate */
- int max_cs_len = ((float) _j2k_bandwidth) / 8 / _frames_per_second;
- if (_frame->eyes() == EYES_LEFT || _frame->eyes() == EYES_RIGHT) {
- /* In 3D we have only half the normal bandwidth per eye */
- max_cs_len /= 2;
- }
- int const max_comp_size = max_cs_len / 1.25;
-
- /* get a J2K compressor handle */
- opj_cinfo_t* cinfo = opj_create_compress (CODEC_J2K);
- if (cinfo == 0) {
- throw EncodeError (N_("could not create JPEG2000 encoder"));
- }
-
- /* Set encoding parameters to default values */
- opj_cparameters_t parameters;
- opj_set_default_encoder_parameters (¶meters);
-
- /* Set default cinema parameters */
- parameters.tile_size_on = false;
- parameters.cp_tdx = 1;
- parameters.cp_tdy = 1;
-
- /* Tile part */
- parameters.tp_flag = 'C';
- parameters.tp_on = 1;
-
- /* Tile and Image shall be at (0,0) */
- parameters.cp_tx0 = 0;
- parameters.cp_ty0 = 0;
- parameters.image_offset_x0 = 0;
- parameters.image_offset_y0 = 0;
-
- /* Codeblock size = 32x32 */
- parameters.cblockw_init = 32;
- parameters.cblockh_init = 32;
- parameters.csty |= 0x01;
-
- /* The progression order shall be CPRL */
- parameters.prog_order = CPRL;
-
- /* No ROI */
- parameters.roi_compno = -1;
-
- parameters.subsampling_dx = 1;
- parameters.subsampling_dy = 1;
-
- /* 9-7 transform */
- parameters.irreversible = 1;
-
- parameters.tcp_rates[0] = 0;
- parameters.tcp_numlayers++;
- parameters.cp_disto_alloc = 1;
- parameters.cp_rsiz = _resolution == RESOLUTION_2K ? CINEMA2K : CINEMA4K;
- if (_resolution == RESOLUTION_4K) {
- parameters.numpocs = 2;
- parameters.POC[0].tile = 1;
- parameters.POC[0].resno0 = 0;
- parameters.POC[0].compno0 = 0;
- parameters.POC[0].layno1 = 1;
- parameters.POC[0].resno1 = parameters.numresolution - 1;
- parameters.POC[0].compno1 = 3;
- parameters.POC[0].prg1 = CPRL;
- parameters.POC[1].tile = 1;
- parameters.POC[1].resno0 = parameters.numresolution - 1;
- parameters.POC[1].compno0 = 0;
- parameters.POC[1].layno1 = 1;
- parameters.POC[1].resno1 = parameters.numresolution;
- parameters.POC[1].compno1 = 3;
- parameters.POC[1].prg1 = CPRL;
- }
-
- parameters.cp_comment = strdup (N_("DCP-o-matic"));
- parameters.cp_cinema = _resolution == RESOLUTION_2K ? CINEMA2K_24 : CINEMA4K_24;
-
- /* 3 components, so use MCT */
- parameters.tcp_mct = 1;
-
- /* set max image */
- parameters.max_comp_size = max_comp_size;
- parameters.tcp_rates[0] = ((float) (3 * xyz->size().width * xyz->size().height * 12)) / (max_cs_len * 8);
-
- /* Set event manager to null (openjpeg 1.3 bug) */
- cinfo->event_mgr = 0;
-
- /* Setup the encoder parameters using the current image and user parameters */
- opj_setup_encoder (cinfo, ¶meters, xyz->opj_image ());
-
- opj_cio_t* cio = opj_cio_open ((opj_common_ptr) cinfo, 0, 0);
- if (cio == 0) {
- opj_destroy_compress (cinfo);
- throw EncodeError (N_("could not open JPEG2000 stream"));
- }
-
- int const r = opj_encode (cinfo, cio, xyz->opj_image(), 0);
- if (r == 0) {
- opj_cio_close (cio);
- opj_destroy_compress (cinfo);
- throw EncodeError (N_("JPEG2000 encoding failed"));
- }