2 Copyright (C) 2012-2021 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.
35 /** @file src/sound_asset.cc
36 * @brief SoundAsset class
40 #include "compose.hpp"
41 #include "dcp_assert.h"
42 #include "exceptions.h"
43 #include "sound_asset.h"
44 #include "sound_asset_reader.h"
45 #include "sound_asset_writer.h"
46 #include "sound_frame.h"
49 LIBDCP_DISABLE_WARNINGS
50 #include <asdcp/AS_DCP.h>
51 #include <asdcp/KM_fileio.h>
52 #include <asdcp/Metadata.h>
53 LIBDCP_ENABLE_WARNINGS
54 #include <libxml++/nodes/element.h>
55 #include <boost/filesystem.hpp>
62 using std::shared_ptr;
63 using std::dynamic_pointer_cast;
67 SoundAsset::SoundAsset (boost::filesystem::path file)
70 ASDCP::PCM::MXFReader reader;
71 auto r = reader.OpenRead (file.string().c_str());
72 if (ASDCP_FAILURE(r)) {
73 boost::throw_exception (MXFFileError("could not open MXF file for reading", file.string(), r));
76 ASDCP::PCM::AudioDescriptor desc;
77 if (ASDCP_FAILURE (reader.FillAudioDescriptor(desc))) {
78 boost::throw_exception (ReadError("could not read audio MXF information"));
81 _sampling_rate = desc.AudioSamplingRate.Denominator ? (desc.AudioSamplingRate.Numerator / desc.AudioSamplingRate.Denominator) : 0;
82 _channels = desc.ChannelCount;
83 _edit_rate = Fraction (desc.EditRate.Numerator, desc.EditRate.Denominator);
85 _intrinsic_duration = desc.ContainerDuration;
87 ASDCP::WriterInfo info;
88 if (ASDCP_FAILURE (reader.FillWriterInfo(info))) {
89 boost::throw_exception (ReadError("could not read audio MXF information"));
92 ASDCP::MXF::SoundfieldGroupLabelSubDescriptor* soundfield;
93 auto rr = reader.OP1aHeader().GetMDObjectByType(
94 asdcp_smpte_dict->ul(ASDCP::MDD_SoundfieldGroupLabelSubDescriptor),
95 reinterpret_cast<ASDCP::MXF::InterchangeObject**>(&soundfield)
99 if (!soundfield->RFC5646SpokenLanguage.empty()) {
101 soundfield->RFC5646SpokenLanguage.get().EncodeString(buffer, sizeof(buffer));
106 _id = read_writer_info (info);
110 SoundAsset::SoundAsset (Fraction edit_rate, int sampling_rate, int channels, LanguageTag language, Standard standard)
112 , _edit_rate (edit_rate)
113 , _channels (channels)
114 , _sampling_rate (sampling_rate)
115 , _language (language.to_string())
122 SoundAsset::equals (shared_ptr<const Asset> other, EqualityOptions opt, NoteHandler note) const
124 ASDCP::PCM::MXFReader reader_A;
126 auto r = reader_A.OpenRead (file()->string().c_str());
127 if (ASDCP_FAILURE(r)) {
128 boost::throw_exception (MXFFileError("could not open MXF file for reading", file()->string(), r));
131 ASDCP::PCM::MXFReader reader_B;
132 r = reader_B.OpenRead (other->file()->string().c_str());
133 if (ASDCP_FAILURE (r)) {
134 boost::throw_exception (MXFFileError("could not open MXF file for reading", other->file()->string(), r));
137 ASDCP::PCM::AudioDescriptor desc_A;
138 if (ASDCP_FAILURE (reader_A.FillAudioDescriptor(desc_A))) {
139 boost::throw_exception (ReadError ("could not read audio MXF information"));
141 ASDCP::PCM::AudioDescriptor desc_B;
142 if (ASDCP_FAILURE (reader_B.FillAudioDescriptor(desc_B))) {
143 boost::throw_exception (ReadError ("could not read audio MXF information"));
146 if (desc_A.EditRate != desc_B.EditRate) {
150 "audio edit rates differ: %1/%2 cf %3/%4",
151 desc_A.EditRate.Numerator, desc_A.EditRate.Denominator, desc_B.EditRate.Numerator, desc_B.EditRate.Denominator
155 } else if (desc_A.AudioSamplingRate != desc_B.AudioSamplingRate) {
159 "audio sampling rates differ: %1 cf %2",
160 desc_A.AudioSamplingRate.Numerator, desc_A.AudioSamplingRate.Denominator,
161 desc_B.AudioSamplingRate.Numerator, desc_B.AudioSamplingRate.Numerator
165 } else if (desc_A.Locked != desc_B.Locked) {
166 note (NoteType::ERROR, String::compose ("audio locked flags differ: %1 cf %2", desc_A.Locked, desc_B.Locked));
168 } else if (desc_A.ChannelCount != desc_B.ChannelCount) {
169 note (NoteType::ERROR, String::compose ("audio channel counts differ: %1 cf %2", desc_A.ChannelCount, desc_B.ChannelCount));
171 } else if (desc_A.QuantizationBits != desc_B.QuantizationBits) {
172 note (NoteType::ERROR, String::compose ("audio bits per sample differ: %1 cf %2", desc_A.QuantizationBits, desc_B.QuantizationBits));
174 } else if (desc_A.BlockAlign != desc_B.BlockAlign) {
175 note (NoteType::ERROR, String::compose ("audio bytes per sample differ: %1 cf %2", desc_A.BlockAlign, desc_B.BlockAlign));
177 } else if (desc_A.AvgBps != desc_B.AvgBps) {
178 note (NoteType::ERROR, String::compose ("audio average bps differ: %1 cf %2", desc_A.AvgBps, desc_B.AvgBps));
180 } else if (desc_A.LinkedTrackID != desc_B.LinkedTrackID) {
181 note (NoteType::ERROR, String::compose ("audio linked track IDs differ: %1 cf %2", desc_A.LinkedTrackID, desc_B.LinkedTrackID));
183 } else if (desc_A.ContainerDuration != desc_B.ContainerDuration) {
184 note (NoteType::ERROR, String::compose ("audio container durations differ: %1 cf %2", desc_A.ContainerDuration, desc_B.ContainerDuration));
186 } else if (desc_A.ChannelFormat != desc_B.ChannelFormat) {
190 auto other_sound = dynamic_pointer_cast<const SoundAsset> (other);
192 auto reader = start_read ();
193 auto other_reader = other_sound->start_read ();
195 for (int i = 0; i < _intrinsic_duration; ++i) {
197 auto frame_A = reader->get_frame (i);
198 auto frame_B = other_reader->get_frame (i);
200 if (frame_A->size() != frame_B->size()) {
201 note (NoteType::ERROR, String::compose ("sizes of audio data for frame %1 differ", i));
205 if (memcmp (frame_A->data(), frame_B->data(), frame_A->size()) != 0) {
206 for (int sample = 0; sample < frame_A->samples(); ++sample) {
207 for (int channel = 0; channel < frame_A->channels(); ++channel) {
208 int32_t const d = abs(frame_A->get(channel, sample) - frame_B->get(channel, sample));
209 if (d > opt.max_audio_sample_error) {
210 note (NoteType::ERROR, String::compose("PCM data difference of %1 in frame %2, channel %3, sample %4", d, i, channel, sample));
222 shared_ptr<SoundAssetWriter>
223 SoundAsset::start_write (boost::filesystem::path file, bool atmos_sync)
225 if (atmos_sync && _channels < 14) {
226 throw MiscError ("Insufficient channels to write ATMOS sync (there must be at least 14)");
229 return shared_ptr<SoundAssetWriter> (new SoundAssetWriter(this, file, atmos_sync));
233 shared_ptr<SoundAssetReader>
234 SoundAsset::start_read () const
236 return shared_ptr<SoundAssetReader> (new SoundAssetReader(this, key(), standard()));
241 SoundAsset::static_pkl_type (Standard standard)
244 case Standard::INTEROP:
245 return "application/x-smpte-mxf;asdcpKind=Sound";
246 case Standard::SMPTE:
247 return "application/mxf";
255 SoundAsset::valid_mxf (boost::filesystem::path file)
257 ASDCP::PCM::MXFReader reader;
258 Kumu::Result_t r = reader.OpenRead (file.string().c_str());
259 return !ASDCP_FAILURE (r);