2 Copyright (C) 2012-2015 Carl Hetherington <cth@carlh.net>
4 This file is part of libdcp.
6 libdcp is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2 of the License, or
9 (at your option) any later version.
11 libdcp is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with libdcp. If not, see <http://www.gnu.org/licenses/>.
21 /** @file src/openjpeg_image.cc
22 * @brief OpenJPEGImage class.
25 #include "openjpeg_image.h"
26 #include "dcp_assert.h"
32 /** Construct an OpenJPEGImage, taking ownership of the opj_image_t */
33 OpenJPEGImage::OpenJPEGImage (opj_image_t* image)
36 DCP_ASSERT (_opj_image->numcomps == 3);
39 /** Construct a new OpenJPEGImage with undefined contents.
40 * @param size Size for the frame in pixels.
42 OpenJPEGImage::OpenJPEGImage (Size size)
44 opj_image_cmptparm_t cmptparm[3];
46 for (int i = 0; i < 3; ++i) {
49 cmptparm[i].w = size.width;
50 cmptparm[i].h = size.height;
53 cmptparm[i].prec = 12;
58 /* XXX: is this _SRGB right? */
59 _opj_image = opj_image_create (3, &cmptparm[0], OPJ_CLRSPC_SRGB);
60 if (_opj_image == 0) {
61 throw std::runtime_error ("could not create libopenjpeg image");
66 _opj_image->x1 = size.width;
67 _opj_image->y1 = size.height;
70 /** OpenJPEGImage destructor */
71 OpenJPEGImage::~OpenJPEGImage ()
73 opj_image_destroy (_opj_image);
76 /** @param c Component index (0, 1 or 2)
77 * @return Pointer to the data for component c.
80 OpenJPEGImage::data (int c) const
82 DCP_ASSERT (c >= 0 && c < 3);
83 return _opj_image->comps[c].data;
86 /** @return Size of the image in pixels */
88 OpenJPEGImage::size () const
90 /* XXX: this may not be right; x0 and y0 can presumably be non-zero */
91 return dcp::Size (_opj_image->x1, _opj_image->y1);
95 OpenJPEGImage::precision (int component) const
97 return _opj_image->comps[component].prec;
101 OpenJPEGImage::srgb () const
103 return _opj_image->color_space == OPJ_CLRSPC_SRGB;