2 Copyright (C) 2014 Carl Hetherington <cth@carlh.net>
4 This file is part of DCP-o-matic.
6 DCP-o-matic 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 DCP-o-matic 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 DCP-o-matic. If not, see <http://www.gnu.org/licenses/>.
21 #include "dcp_examiner.h"
22 #include "dcp_content.h"
23 #include "exceptions.h"
27 #include <dcp/decrypted_kdm.h>
30 #include <dcp/reel_picture_asset.h>
31 #include <dcp/reel_sound_asset.h>
32 #include <dcp/mono_picture_asset.h>
33 #include <dcp/mono_picture_asset_reader.h>
34 #include <dcp/mono_picture_frame.h>
35 #include <dcp/stereo_picture_asset.h>
36 #include <dcp/stereo_picture_asset_reader.h>
37 #include <dcp/stereo_picture_frame.h>
38 #include <dcp/sound_asset.h>
45 using std::runtime_error;
46 using boost::shared_ptr;
47 using boost::dynamic_pointer_cast;
49 DCPExaminer::DCPExaminer (shared_ptr<const DCPContent> content)
52 , _has_subtitles (false)
56 dcp::DCP dcp (content->directory ());
57 dcp.read (false, 0, true);
59 if (content->kdm ()) {
60 dcp.add (dcp::DecryptedKDM (content->kdm().get(), Config::instance()->decryption_chain()->key().get ()));
63 if (dcp.cpls().size() == 0) {
64 throw DCPError ("No CPLs found in DCP");
65 } else if (dcp.cpls().size() > 1) {
66 throw DCPError ("Multiple CPLs found in DCP");
69 _name = dcp.cpls().front()->content_title_text ();
71 list<shared_ptr<dcp::Reel> > reels = dcp.cpls().front()->reels ();
72 for (list<shared_ptr<dcp::Reel> >::const_iterator i = reels.begin(); i != reels.end(); ++i) {
74 if ((*i)->main_picture ()) {
75 dcp::Fraction const frac = (*i)->main_picture()->frame_rate ();
76 float const fr = float(frac.numerator) / frac.denominator;
77 if (!_video_frame_rate) {
78 _video_frame_rate = fr;
79 } else if (_video_frame_rate.get() != fr) {
80 throw DCPError (_("Mismatched frame rates in DCP"));
83 shared_ptr<dcp::PictureAsset> asset = (*i)->main_picture()->asset ();
85 _video_size = asset->size ();
86 } else if (_video_size.get() != asset->size ()) {
87 throw DCPError (_("Mismatched video sizes in DCP"));
90 _video_length += (*i)->main_picture()->duration();
93 if ((*i)->main_sound ()) {
94 shared_ptr<dcp::SoundAsset> asset = (*i)->main_sound()->asset ();
96 if (!_audio_channels) {
97 _audio_channels = asset->channels ();
98 } else if (_audio_channels.get() != asset->channels ()) {
99 throw DCPError (_("Mismatched audio channel counts in DCP"));
102 if (!_audio_frame_rate) {
103 _audio_frame_rate = asset->sampling_rate ();
104 } else if (_audio_frame_rate.get() != asset->sampling_rate ()) {
105 throw DCPError (_("Mismatched audio sample rates in DCP"));
108 _audio_length += (*i)->main_sound()->duration();
111 if ((*i)->main_subtitle ()) {
112 _has_subtitles = true;
116 _encrypted = dcp.encrypted ();
119 /* Check that we can read the first picture frame */
121 if (!dcp.cpls().empty () && !dcp.cpls().front()->reels().empty ()) {
122 shared_ptr<dcp::PictureAsset> asset = dcp.cpls().front()->reels().front()->main_picture()->asset ();
123 shared_ptr<dcp::MonoPictureAsset> mono = dynamic_pointer_cast<dcp::MonoPictureAsset> (asset);
124 shared_ptr<dcp::StereoPictureAsset> stereo = dynamic_pointer_cast<dcp::StereoPictureAsset> (asset);
127 mono->start_read()->get_frame(0)->xyz_image ();
129 stereo->start_read()->get_frame(0)->xyz_image (dcp::EYE_LEFT);
133 } catch (dcp::DCPReadError& e) {
135 if (_encrypted && content->kdm ()) {
136 /* XXX: maybe don't use an exception for this */
137 throw runtime_error (_("The KDM does not decrypt the DCP. Perhaps it is targeted at the wrong CPL."));
141 _standard = dcp.standard ();