2 Copyright (C) 2012-2015 Carl Hetherington <cth@carlh.net>
3 Adapted from code Copyright (C) 2010-2011 Terrence Meiczinger
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 2 of the License, or
8 (at your option) any later version.
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the Free Software
17 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
21 #include "openjpeg_encoder.h"
22 #include "encoded_data.h"
23 #include "exceptions.h"
24 #include <dcp/xyz_image.h>
29 using boost::shared_ptr;
32 OpenJPEGEncoder::name () const
34 return _("OpenJPEG library");
37 shared_ptr<EncodedData>
38 OpenJPEGEncoder::do_encode (shared_ptr<const dcp::XYZImage> input, dcp::NoteHandler note)
40 /* Set the max image and component sizes based on frame_rate */
41 int max_cs_len = ((float) _bandwidth.get()) / 8 / _frame_rate.get();
43 /* In 3D we have only half the normal bandwidth per eye */
46 int const max_comp_size = max_cs_len / 1.25;
48 /* get a J2K compressor handle */
49 opj_cinfo_t* cinfo = opj_create_compress (CODEC_J2K);
51 throw EncodeError (N_("could not create JPEG2000 encoder"));
54 /* Set encoding parameters to default values */
55 opj_cparameters_t parameters;
56 opj_set_default_encoder_parameters (¶meters);
58 /* Set default cinema parameters */
59 parameters.tile_size_on = false;
60 parameters.cp_tdx = 1;
61 parameters.cp_tdy = 1;
64 parameters.tp_flag = 'C';
67 /* Tile and Image shall be at (0,0) */
68 parameters.cp_tx0 = 0;
69 parameters.cp_ty0 = 0;
70 parameters.image_offset_x0 = 0;
71 parameters.image_offset_y0 = 0;
73 /* Codeblock size = 32x32 */
74 parameters.cblockw_init = 32;
75 parameters.cblockh_init = 32;
76 parameters.csty |= 0x01;
78 /* The progression order shall be CPRL */
79 parameters.prog_order = CPRL;
82 parameters.roi_compno = -1;
84 parameters.subsampling_dx = 1;
85 parameters.subsampling_dy = 1;
88 parameters.irreversible = 1;
90 parameters.tcp_rates[0] = 0;
91 parameters.tcp_numlayers++;
92 parameters.cp_disto_alloc = 1;
93 parameters.cp_rsiz = _resolution.get() == RESOLUTION_2K ? CINEMA2K : CINEMA4K;
94 if (_resolution.get() == RESOLUTION_4K) {
95 parameters.numpocs = 2;
96 parameters.POC[0].tile = 1;
97 parameters.POC[0].resno0 = 0;
98 parameters.POC[0].compno0 = 0;
99 parameters.POC[0].layno1 = 1;
100 parameters.POC[0].resno1 = parameters.numresolution - 1;
101 parameters.POC[0].compno1 = 3;
102 parameters.POC[0].prg1 = CPRL;
103 parameters.POC[1].tile = 1;
104 parameters.POC[1].resno0 = parameters.numresolution - 1;
105 parameters.POC[1].compno0 = 0;
106 parameters.POC[1].layno1 = 1;
107 parameters.POC[1].resno1 = parameters.numresolution;
108 parameters.POC[1].compno1 = 3;
109 parameters.POC[1].prg1 = CPRL;
112 parameters.cp_comment = strdup (N_("DCP-o-matic"));
113 parameters.cp_cinema = _resolution.get() == RESOLUTION_2K ? CINEMA2K_24 : CINEMA4K_24;
115 /* 3 components, so use MCT */
116 parameters.tcp_mct = 1;
119 parameters.max_comp_size = max_comp_size;
120 parameters.tcp_rates[0] = ((float) (3 * input->size().width * input->size().height * 12)) / (max_cs_len * 8);
122 /* Set event manager to null (openjpeg 1.3 bug) */
123 cinfo->event_mgr = 0;
125 /* Setup the encoder parameters using the current image and user parameters */
126 opj_setup_encoder (cinfo, ¶meters, input->opj_image ());
128 opj_cio_t* cio = opj_cio_open ((opj_common_ptr) cinfo, 0, 0);
130 opj_destroy_compress (cinfo);
131 throw EncodeError (N_("could not open JPEG2000 stream"));
134 int const r = opj_encode (cinfo, cio, input->opj_image(), 0);
137 opj_destroy_compress (cinfo);
138 throw EncodeError (N_("JPEG2000 encoding failed"));
141 shared_ptr<EncodedData> enc (new LocallyEncodedData (cio->buffer, cio_tell (cio)));
144 free (parameters.cp_comment);
145 opj_destroy_compress (cinfo);