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 "dcp_assert.h"
46 #include <asdcp/KM_fileio.h>
47 #include <asdcp/AS_DCP.h>
48 #include <libxml++/nodes/element.h>
49 #include <boost/filesystem.hpp>
55 using boost::shared_ptr;
56 using boost::dynamic_pointer_cast;
59 SoundAsset::SoundAsset (boost::filesystem::path file)
62 ASDCP::PCM::MXFReader reader;
63 Kumu::Result_t r = reader.OpenRead (file.string().c_str());
64 if (ASDCP_FAILURE (r)) {
65 boost::throw_exception (MXFFileError ("could not open MXF file for reading", file.string(), r));
68 ASDCP::PCM::AudioDescriptor desc;
69 if (ASDCP_FAILURE (reader.FillAudioDescriptor (desc))) {
70 boost::throw_exception (DCPReadError ("could not read audio MXF information"));
73 _sampling_rate = desc.AudioSamplingRate.Numerator / desc.AudioSamplingRate.Denominator;
74 _channels = desc.ChannelCount;
75 _edit_rate = Fraction (desc.EditRate.Numerator, desc.EditRate.Denominator);
77 _intrinsic_duration = desc.ContainerDuration;
79 ASDCP::WriterInfo info;
80 if (ASDCP_FAILURE (reader.FillWriterInfo (info))) {
81 boost::throw_exception (DCPReadError ("could not read audio MXF information"));
84 _id = read_writer_info (info);
87 SoundAsset::SoundAsset (Fraction edit_rate, int sampling_rate, int channels, Standard standard)
89 , _edit_rate (edit_rate)
90 , _intrinsic_duration (0)
91 , _channels (channels)
92 , _sampling_rate (sampling_rate)
98 SoundAsset::equals (shared_ptr<const Asset> other, EqualityOptions opt, NoteHandler note) const
100 ASDCP::PCM::MXFReader reader_A;
101 DCP_ASSERT (file ());
102 Kumu::Result_t r = reader_A.OpenRead (file()->string().c_str());
103 if (ASDCP_FAILURE (r)) {
104 boost::throw_exception (MXFFileError ("could not open MXF file for reading", file()->string(), r));
107 ASDCP::PCM::MXFReader reader_B;
108 r = reader_B.OpenRead (other->file()->string().c_str());
109 if (ASDCP_FAILURE (r)) {
110 boost::throw_exception (MXFFileError ("could not open MXF file for reading", other->file()->string(), r));
113 ASDCP::PCM::AudioDescriptor desc_A;
114 if (ASDCP_FAILURE (reader_A.FillAudioDescriptor (desc_A))) {
115 boost::throw_exception (DCPReadError ("could not read audio MXF information"));
117 ASDCP::PCM::AudioDescriptor desc_B;
118 if (ASDCP_FAILURE (reader_B.FillAudioDescriptor (desc_B))) {
119 boost::throw_exception (DCPReadError ("could not read audio MXF information"));
122 if (desc_A.EditRate != desc_B.EditRate) {
126 "audio edit rates differ: %1/%2 cf %3/%4",
127 desc_A.EditRate.Numerator, desc_A.EditRate.Denominator, desc_B.EditRate.Numerator, desc_B.EditRate.Denominator
131 } else if (desc_A.AudioSamplingRate != desc_B.AudioSamplingRate) {
135 "audio sampling rates differ: %1 cf %2",
136 desc_A.AudioSamplingRate.Numerator, desc_A.AudioSamplingRate.Denominator,
137 desc_B.AudioSamplingRate.Numerator, desc_B.AudioSamplingRate.Numerator
141 } else if (desc_A.Locked != desc_B.Locked) {
142 note (DCP_ERROR, String::compose ("audio locked flags differ: %1 cf %2", desc_A.Locked, desc_B.Locked));
144 } else if (desc_A.ChannelCount != desc_B.ChannelCount) {
145 note (DCP_ERROR, String::compose ("audio channel counts differ: %1 cf %2", desc_A.ChannelCount, desc_B.ChannelCount));
147 } else if (desc_A.QuantizationBits != desc_B.QuantizationBits) {
148 note (DCP_ERROR, String::compose ("audio bits per sample differ: %1 cf %2", desc_A.QuantizationBits, desc_B.QuantizationBits));
150 } else if (desc_A.BlockAlign != desc_B.BlockAlign) {
151 note (DCP_ERROR, String::compose ("audio bytes per sample differ: %1 cf %2", desc_A.BlockAlign, desc_B.BlockAlign));
153 } else if (desc_A.AvgBps != desc_B.AvgBps) {
154 note (DCP_ERROR, String::compose ("audio average bps differ: %1 cf %2", desc_A.AvgBps, desc_B.AvgBps));
156 } else if (desc_A.LinkedTrackID != desc_B.LinkedTrackID) {
157 note (DCP_ERROR, String::compose ("audio linked track IDs differ: %1 cf %2", desc_A.LinkedTrackID, desc_B.LinkedTrackID));
159 } else if (desc_A.ContainerDuration != desc_B.ContainerDuration) {
160 note (DCP_ERROR, String::compose ("audio container durations differ: %1 cf %2", desc_A.ContainerDuration, desc_B.ContainerDuration));
162 } else if (desc_A.ChannelFormat != desc_B.ChannelFormat) {
166 shared_ptr<const SoundAsset> other_sound = dynamic_pointer_cast<const SoundAsset> (other);
168 shared_ptr<const SoundAssetReader> reader = start_read ();
169 shared_ptr<const SoundAssetReader> other_reader = other_sound->start_read ();
171 for (int i = 0; i < _intrinsic_duration; ++i) {
173 shared_ptr<const SoundFrame> frame_A = reader->get_frame (i);
174 shared_ptr<const SoundFrame> frame_B = other_reader->get_frame (i);
176 if (frame_A->size() != frame_B->size()) {
177 note (DCP_ERROR, String::compose ("sizes of audio data for frame %1 differ", i));
181 if (memcmp (frame_A->data(), frame_B->data(), frame_A->size()) != 0) {
182 for (int i = 0; i < frame_A->size(); ++i) {
183 int const d = abs (frame_A->data()[i] - frame_B->data()[i]);
184 if (d > opt.max_audio_sample_error) {
185 note (DCP_ERROR, String::compose ("PCM data difference of %1", d));
195 shared_ptr<SoundAssetWriter>
196 SoundAsset::start_write (boost::filesystem::path file)
198 /* XXX: can't we use a shared_ptr here? */
199 return shared_ptr<SoundAssetWriter> (new SoundAssetWriter (this, file));
202 shared_ptr<SoundAssetReader>
203 SoundAsset::start_read () const
205 return shared_ptr<SoundAssetReader> (new SoundAssetReader (this, key(), standard()));
209 SoundAsset::static_pkl_type (Standard standard)
213 return "application/x-smpte-mxf;asdcpKind=Sound";
215 return "application/mxf";
222 SoundAsset::valid_mxf (boost::filesystem::path file)
224 ASDCP::PCM::MXFReader reader;
225 Kumu::Result_t r = reader.OpenRead (file.string().c_str ());
226 return !ASDCP_FAILURE (r);