2 Copyright (C) 2012-2016 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/>.
19 In addition, as a special exception, the copyright holders give
20 permission to link the code of portions of this program with the
21 OpenSSL library under certain conditions as described in each
22 individual source file, and distribute linked combinations
25 You must obey the GNU General Public License in all respects
26 for all of the code used other than OpenSSL. If you modify
27 file(s) with this exception, you may extend this exception to your
28 version of the file(s), but you are not obligated to do so. If you
29 do not wish to do so, delete this exception statement from your
30 version. If you delete this exception statement from all source
31 files in the program, then also delete it here.
34 /** @file src/sound_mxf.cc
35 * @brief SoundAsset class.
38 #include "sound_asset.h"
40 #include "exceptions.h"
41 #include "sound_frame.h"
42 #include "sound_asset_writer.h"
43 #include "sound_asset_reader.h"
44 #include "compose.hpp"
45 #include "KM_fileio.h"
47 #include "dcp_assert.h"
48 #include <libxml++/nodes/element.h>
49 #include <boost/filesystem.hpp>
54 using std::stringstream;
58 using boost::shared_ptr;
59 using boost::dynamic_pointer_cast;
62 SoundAsset::SoundAsset (boost::filesystem::path file)
65 ASDCP::PCM::MXFReader reader;
66 Kumu::Result_t r = reader.OpenRead (file.string().c_str());
67 if (ASDCP_FAILURE (r)) {
68 boost::throw_exception (MXFFileError ("could not open MXF file for reading", file.string(), r));
71 ASDCP::PCM::AudioDescriptor desc;
72 if (ASDCP_FAILURE (reader.FillAudioDescriptor (desc))) {
73 boost::throw_exception (DCPReadError ("could not read audio MXF information"));
76 _sampling_rate = desc.AudioSamplingRate.Numerator / desc.AudioSamplingRate.Denominator;
77 _channels = desc.ChannelCount;
78 _edit_rate = Fraction (desc.EditRate.Numerator, desc.EditRate.Denominator);
80 _intrinsic_duration = desc.ContainerDuration;
82 ASDCP::WriterInfo info;
83 if (ASDCP_FAILURE (reader.FillWriterInfo (info))) {
84 boost::throw_exception (DCPReadError ("could not read audio MXF information"));
87 _id = read_writer_info (info);
90 SoundAsset::SoundAsset (Fraction edit_rate, int sampling_rate, int channels)
91 : _edit_rate (edit_rate)
92 , _intrinsic_duration (0)
93 , _channels (channels)
94 , _sampling_rate (sampling_rate)
100 SoundAsset::equals (shared_ptr<const Asset> other, EqualityOptions opt, NoteHandler note) const
102 ASDCP::PCM::MXFReader reader_A;
103 Kumu::Result_t r = reader_A.OpenRead (file().string().c_str());
104 if (ASDCP_FAILURE (r)) {
105 boost::throw_exception (MXFFileError ("could not open MXF file for reading", file().string(), r));
108 ASDCP::PCM::MXFReader reader_B;
109 r = reader_B.OpenRead (other->file().string().c_str());
110 if (ASDCP_FAILURE (r)) {
111 boost::throw_exception (MXFFileError ("could not open MXF file for reading", file().string(), r));
114 ASDCP::PCM::AudioDescriptor desc_A;
115 if (ASDCP_FAILURE (reader_A.FillAudioDescriptor (desc_A))) {
116 boost::throw_exception (DCPReadError ("could not read audio MXF information"));
118 ASDCP::PCM::AudioDescriptor desc_B;
119 if (ASDCP_FAILURE (reader_B.FillAudioDescriptor (desc_B))) {
120 boost::throw_exception (DCPReadError ("could not read audio MXF information"));
124 desc_A.EditRate != desc_B.EditRate ||
125 desc_A.AudioSamplingRate != desc_B.AudioSamplingRate ||
126 desc_A.Locked != desc_B.Locked ||
127 desc_A.ChannelCount != desc_B.ChannelCount ||
128 desc_A.QuantizationBits != desc_B.QuantizationBits ||
129 desc_A.BlockAlign != desc_B.BlockAlign ||
130 desc_A.AvgBps != desc_B.AvgBps ||
131 desc_A.LinkedTrackID != desc_B.LinkedTrackID ||
132 desc_A.ContainerDuration != desc_B.ContainerDuration
133 // desc_A.ChannelFormat != desc_B.ChannelFormat ||
136 note (DCP_ERROR, "audio MXF picture descriptors differ");
140 shared_ptr<const SoundAsset> other_sound = dynamic_pointer_cast<const SoundAsset> (other);
142 shared_ptr<const SoundAssetReader> reader = start_read ();
143 shared_ptr<const SoundAssetReader> other_reader = other_sound->start_read ();
145 for (int i = 0; i < _intrinsic_duration; ++i) {
147 shared_ptr<const SoundFrame> frame_A = reader->get_frame (i);
148 shared_ptr<const SoundFrame> frame_B = other_reader->get_frame (i);
150 if (frame_A->size() != frame_B->size()) {
151 note (DCP_ERROR, String::compose ("sizes of audio data for frame %1 differ", i));
155 if (memcmp (frame_A->data(), frame_B->data(), frame_A->size()) != 0) {
156 for (int i = 0; i < frame_A->size(); ++i) {
157 int const d = abs (frame_A->data()[i] - frame_B->data()[i]);
158 if (d > opt.max_audio_sample_error) {
159 note (DCP_ERROR, String::compose ("PCM data difference of %1", d));
169 shared_ptr<SoundAssetWriter>
170 SoundAsset::start_write (boost::filesystem::path file, Standard standard)
172 /* XXX: can't we use a shared_ptr here? */
173 return shared_ptr<SoundAssetWriter> (new SoundAssetWriter (this, file, standard));
176 shared_ptr<SoundAssetReader>
177 SoundAsset::start_read () const
179 return shared_ptr<SoundAssetReader> (new SoundAssetReader (this));
183 SoundAsset::pkl_type (Standard standard) const
187 return "application/x-smpte-mxf;asdcpKind=Sound";
189 return "application/mxf";
196 SoundAsset::valid_mxf (boost::filesystem::path file)
198 ASDCP::PCM::MXFReader reader;
199 Kumu::Result_t r = reader.OpenRead (file.string().c_str ());
200 return !ASDCP_FAILURE (r);