2 Copyright (C) 2012-2014 Carl Hetherington <cth@carlh.net>
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20 /** @file examples/make_dcp.cc
21 * @brief Shows how to make a DCP from some JPEG2000 and audio data.
27 /* If you are using an installed libdcp, these #includes would need to be changed to
28 #include <libdcp/dcp.h>
29 #include <libdcp/cpl.h>
30 #include <libdcp/mono_picture_asset.h>
36 #include "mono_picture_mxf.h"
37 #include "mono_picture_mxf_writer.h"
38 #include "sound_mxf.h"
39 #include "sound_mxf_writer.h"
42 #include "reel_mono_picture_asset.h"
43 #include "reel_sound_asset.h"
48 /* Create a directory to put the DCP in */
49 boost::filesystem::create_directory ("DCP");
51 /* Make a picture MXF. This is a file which combines JPEG2000 files together to make
52 up the video of the DCP. First, create the object, specifying a frame rate of 24 frames
56 boost::shared_ptr<dcp::MonoPictureMXF> picture_mxf (new dcp::MonoPictureMXF (dcp::Fraction (24, 1)));
58 /* Start off a write to it */
59 boost::shared_ptr<dcp::PictureMXFWriter> picture_writer = picture_mxf->start_write ("DCP/picture.mxf", dcp::SMPTE, false);
61 /* Write 24 frames of the same JPEG2000 file */
62 dcp::File picture ("examples/help.j2c");
63 for (int i = 0; i < 24; ++i) {
64 picture_writer->write (picture.data(), picture.size());
68 picture_writer->finalize ();
70 /* Now create a sound MXF. As before, create an object and a writer.
71 When creating the object we specify the sampling rate (48kHz) and the number of channels (2).
73 boost::shared_ptr<dcp::SoundMXF> sound_mxf (new dcp::SoundMXF (dcp::Fraction (24, 1), 48000, 2));
74 boost::shared_ptr<dcp::SoundMXFWriter> sound_writer = sound_mxf->start_write ("DCP/sound.mxf", dcp::SMPTE);
76 /* Write some sine waves */
78 audio[0] = new float[48000];
79 audio[1] = new float[48000];
80 for (int i = 0; i < 48000; ++i) {
81 audio[0][i] = sin (2 * M_PI * i * 440 / 48000) * 0.25;
82 audio[1][i] = sin (2 * M_PI * i * 880 / 48000) * 0.25;
84 sound_writer->write (audio, 48000);
89 sound_writer->finalize ();
91 /* Now create a reel */
92 boost::shared_ptr<dcp::Reel> reel (new dcp::Reel ());
94 /* Add picture and sound to it. The zeros are the `entry points', i.e. the first
95 (video) frame from the MXFs that the reel should play.
97 reel->add (boost::shared_ptr<dcp::ReelPictureAsset> (new dcp::ReelMonoPictureAsset (picture_mxf, 0)));
98 reel->add (boost::shared_ptr<dcp::ReelSoundAsset> (new dcp::ReelSoundAsset (sound_mxf, 0)));
100 /* Make a CPL with this reel */
101 boost::shared_ptr<dcp::CPL> cpl (new dcp::CPL ("My film", dcp::FEATURE));
105 dcp::DCP dcp ("DCP");
107 dcp.add (picture_mxf);
109 dcp.write_xml (dcp::SMPTE);