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Diffstat (limited to 'src/lib/openjpeg_encoder.cc')
| -rw-r--r-- | src/lib/openjpeg_encoder.cc | 173 |
1 files changed, 173 insertions, 0 deletions
diff --git a/src/lib/openjpeg_encoder.cc b/src/lib/openjpeg_encoder.cc new file mode 100644 index 000000000..545c6ad18 --- /dev/null +++ b/src/lib/openjpeg_encoder.cc @@ -0,0 +1,173 @@ +/* + Copyright (C) 2012-2015 Carl Hetherington <cth@carlh.net> + Adapted from code Copyright (C) 2010-2011 Terrence Meiczinger + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + +*/ + +#include "openjpeg_encoder.h" +#include "encoded_data.h" +#include "exceptions.h" +#include <dcp/xyz_image.h> + +#include "i18n.h" + +using std::string; +using boost::shared_ptr; + +string +OpenJPEGEncoder::name () const +{ + return _("OpenJPEG library"); +} + +shared_ptr<EncodedData> +OpenJPEGEncoder::do_encode (shared_ptr<const dcp::XYZImage> input, dcp::NoteHandler note) +{ + /* Set the max image and component sizes based on frame_rate */ + int max_cs_len = ((float) _bandwidth) / 8 / _frame_rate; + if (_threed) { + /* 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 * input->size().width * input->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, input->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, input->opj_image(), 0); + if (r == 0) { + opj_cio_close (cio); + opj_destroy_compress (cinfo); + throw EncodeError (N_("JPEG2000 encoding failed")); + } + + shared_ptr<EncodedData> enc (new LocallyEncodedData (cio->buffer, cio_tell (cio))); + + opj_cio_close (cio); + free (parameters.cp_comment); + opj_destroy_compress (cinfo); + + return enc; +} + + +void +OpenJPEGEncoder::set_bandwidth (int bandwidth) +{ + _bandwidth = bandwidth; +} + +void +OpenJPEGEncoder::set_frame_rate (int frame_rate) +{ + _frame_rate = frame_rate; +} + +void +OpenJPEGEncoder::set_resolution (Resolution resolution) +{ + _resolution = resolution; +} + +void +OpenJPEGEncoder::set_threed (bool threed) +{ + _threed = threed; +} |