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 "sound_asset.h"
42 #include "exceptions.h"
43 #include "sound_frame.h"
44 #include "sound_asset_writer.h"
45 #include "sound_asset_reader.h"
46 #include "compose.hpp"
47 #include "dcp_assert.h"
48 #include <asdcp/AS_DCP.h>
49 #include <asdcp/KM_fileio.h>
50 #include <asdcp/Metadata.h>
51 #include <libxml++/nodes/element.h>
52 #include <boost/filesystem.hpp>
59 using std::shared_ptr;
60 using std::dynamic_pointer_cast;
64 SoundAsset::SoundAsset (boost::filesystem::path file)
67 ASDCP::PCM::MXFReader reader;
68 auto r = reader.OpenRead (file.string().c_str());
69 if (ASDCP_FAILURE(r)) {
70 boost::throw_exception (MXFFileError("could not open MXF file for reading", file.string(), r));
73 ASDCP::PCM::AudioDescriptor desc;
74 if (ASDCP_FAILURE (reader.FillAudioDescriptor(desc))) {
75 boost::throw_exception (ReadError("could not read audio MXF information"));
78 _sampling_rate = desc.AudioSamplingRate.Numerator / desc.AudioSamplingRate.Denominator;
79 _channels = desc.ChannelCount;
80 _edit_rate = Fraction (desc.EditRate.Numerator, desc.EditRate.Denominator);
82 _intrinsic_duration = desc.ContainerDuration;
84 ASDCP::WriterInfo info;
85 if (ASDCP_FAILURE (reader.FillWriterInfo(info))) {
86 boost::throw_exception (ReadError("could not read audio MXF information"));
89 ASDCP::MXF::SoundfieldGroupLabelSubDescriptor* soundfield;
90 auto rr = reader.OP1aHeader().GetMDObjectByType(
91 asdcp_smpte_dict->ul(ASDCP::MDD_SoundfieldGroupLabelSubDescriptor),
92 reinterpret_cast<ASDCP::MXF::InterchangeObject**>(&soundfield)
96 if (!soundfield->RFC5646SpokenLanguage.empty()) {
98 soundfield->RFC5646SpokenLanguage.get().EncodeString(buffer, sizeof(buffer));
103 _id = read_writer_info (info);
107 SoundAsset::SoundAsset (Fraction edit_rate, int sampling_rate, int channels, LanguageTag language, Standard standard)
109 , _edit_rate (edit_rate)
110 , _channels (channels)
111 , _sampling_rate (sampling_rate)
112 , _language (language.to_string())
119 SoundAsset::equals (shared_ptr<const Asset> other, EqualityOptions opt, NoteHandler note) const
121 ASDCP::PCM::MXFReader reader_A;
123 auto r = reader_A.OpenRead (file()->string().c_str());
124 if (ASDCP_FAILURE(r)) {
125 boost::throw_exception (MXFFileError("could not open MXF file for reading", file()->string(), r));
128 ASDCP::PCM::MXFReader reader_B;
129 r = reader_B.OpenRead (other->file()->string().c_str());
130 if (ASDCP_FAILURE (r)) {
131 boost::throw_exception (MXFFileError("could not open MXF file for reading", other->file()->string(), r));
134 ASDCP::PCM::AudioDescriptor desc_A;
135 if (ASDCP_FAILURE (reader_A.FillAudioDescriptor(desc_A))) {
136 boost::throw_exception (ReadError ("could not read audio MXF information"));
138 ASDCP::PCM::AudioDescriptor desc_B;
139 if (ASDCP_FAILURE (reader_B.FillAudioDescriptor(desc_B))) {
140 boost::throw_exception (ReadError ("could not read audio MXF information"));
143 if (desc_A.EditRate != desc_B.EditRate) {
147 "audio edit rates differ: %1/%2 cf %3/%4",
148 desc_A.EditRate.Numerator, desc_A.EditRate.Denominator, desc_B.EditRate.Numerator, desc_B.EditRate.Denominator
152 } else if (desc_A.AudioSamplingRate != desc_B.AudioSamplingRate) {
156 "audio sampling rates differ: %1 cf %2",
157 desc_A.AudioSamplingRate.Numerator, desc_A.AudioSamplingRate.Denominator,
158 desc_B.AudioSamplingRate.Numerator, desc_B.AudioSamplingRate.Numerator
162 } else if (desc_A.Locked != desc_B.Locked) {
163 note (NoteType::ERROR, String::compose ("audio locked flags differ: %1 cf %2", desc_A.Locked, desc_B.Locked));
165 } else if (desc_A.ChannelCount != desc_B.ChannelCount) {
166 note (NoteType::ERROR, String::compose ("audio channel counts differ: %1 cf %2", desc_A.ChannelCount, desc_B.ChannelCount));
168 } else if (desc_A.QuantizationBits != desc_B.QuantizationBits) {
169 note (NoteType::ERROR, String::compose ("audio bits per sample differ: %1 cf %2", desc_A.QuantizationBits, desc_B.QuantizationBits));
171 } else if (desc_A.BlockAlign != desc_B.BlockAlign) {
172 note (NoteType::ERROR, String::compose ("audio bytes per sample differ: %1 cf %2", desc_A.BlockAlign, desc_B.BlockAlign));
174 } else if (desc_A.AvgBps != desc_B.AvgBps) {
175 note (NoteType::ERROR, String::compose ("audio average bps differ: %1 cf %2", desc_A.AvgBps, desc_B.AvgBps));
177 } else if (desc_A.LinkedTrackID != desc_B.LinkedTrackID) {
178 note (NoteType::ERROR, String::compose ("audio linked track IDs differ: %1 cf %2", desc_A.LinkedTrackID, desc_B.LinkedTrackID));
180 } else if (desc_A.ContainerDuration != desc_B.ContainerDuration) {
181 note (NoteType::ERROR, String::compose ("audio container durations differ: %1 cf %2", desc_A.ContainerDuration, desc_B.ContainerDuration));
183 } else if (desc_A.ChannelFormat != desc_B.ChannelFormat) {
187 auto other_sound = dynamic_pointer_cast<const SoundAsset> (other);
189 auto reader = start_read ();
190 auto other_reader = other_sound->start_read ();
192 for (int i = 0; i < _intrinsic_duration; ++i) {
194 auto frame_A = reader->get_frame (i);
195 auto frame_B = other_reader->get_frame (i);
197 if (frame_A->size() != frame_B->size()) {
198 note (NoteType::ERROR, String::compose ("sizes of audio data for frame %1 differ", i));
202 if (memcmp (frame_A->data(), frame_B->data(), frame_A->size()) != 0) {
203 for (int sample = 0; sample < frame_A->samples(); ++sample) {
204 for (int channel = 0; channel < frame_A->channels(); ++channel) {
205 int32_t const d = abs(frame_A->get(channel, sample) - frame_B->get(channel, sample));
206 if (d > opt.max_audio_sample_error) {
207 note (NoteType::ERROR, String::compose ("PCM data difference of %1", d));
219 shared_ptr<SoundAssetWriter>
220 SoundAsset::start_write (boost::filesystem::path file, bool atmos_sync)
222 if (atmos_sync && _channels < 14) {
223 throw MiscError ("Insufficient channels to write ATMOS sync (there must be at least 14)");
226 return shared_ptr<SoundAssetWriter> (new SoundAssetWriter(this, file, atmos_sync));
230 shared_ptr<SoundAssetReader>
231 SoundAsset::start_read () const
233 return shared_ptr<SoundAssetReader> (new SoundAssetReader(this, key(), standard()));
238 SoundAsset::static_pkl_type (Standard standard)
241 case Standard::INTEROP:
242 return "application/x-smpte-mxf;asdcpKind=Sound";
243 case Standard::SMPTE:
244 return "application/mxf";
252 SoundAsset::valid_mxf (boost::filesystem::path file)
254 ASDCP::PCM::MXFReader reader;
255 Kumu::Result_t r = reader.OpenRead (file.string().c_str());
256 return !ASDCP_FAILURE (r);