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/*
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;
}
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