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"));
123 if (desc_A.EditRate != desc_B.EditRate) {
127 "audio edit rates differ: %1/%2 cf %3/%4",
128 desc_A.EditRate.Numerator, desc_A.EditRate.Denominator, desc_B.EditRate.Numerator, desc_B.EditRate.Denominator
132 } else if (desc_A.AudioSamplingRate != desc_B.AudioSamplingRate) {
136 "audio sampling rates differ: %1 cf %2",
137 desc_A.AudioSamplingRate.Numerator, desc_A.AudioSamplingRate.Denominator,
138 desc_B.AudioSamplingRate.Numerator, desc_B.AudioSamplingRate.Numerator
142 } else if (desc_A.Locked != desc_B.Locked) {
143 note (DCP_ERROR, String::compose ("audio locked flags differ: %1 cf %2", desc_A.Locked, desc_B.Locked));
145 } else if (desc_A.ChannelCount != desc_B.ChannelCount) {
146 note (DCP_ERROR, String::compose ("audio channel counts differ: %1 cf %2", desc_A.ChannelCount, desc_B.ChannelCount));
148 } else if (desc_A.QuantizationBits != desc_B.QuantizationBits) {
149 note (DCP_ERROR, String::compose ("audio bits per sample differ: %1 cf %2", desc_A.QuantizationBits, desc_B.QuantizationBits));
151 } else if (desc_A.BlockAlign != desc_B.BlockAlign) {
152 note (DCP_ERROR, String::compose ("audio bytes per sample differ: %1 cf %2", desc_A.BlockAlign, desc_B.BlockAlign));
154 } else if (desc_A.AvgBps != desc_B.AvgBps) {
155 note (DCP_ERROR, String::compose ("audio average bps differ: %1 cf %2", desc_A.AvgBps, desc_B.AvgBps));
157 } else if (desc_A.LinkedTrackID != desc_B.LinkedTrackID) {
158 note (DCP_ERROR, String::compose ("audio linked track IDs differ: %1 cf %2", desc_A.LinkedTrackID, desc_B.LinkedTrackID));
160 } else if (desc_A.ContainerDuration != desc_B.ContainerDuration) {
161 note (DCP_ERROR, String::compose ("audio container durations differ: %1 cf %2", desc_A.ContainerDuration, desc_B.ContainerDuration));
163 } else if (desc_A.ChannelFormat != desc_B.ChannelFormat) {
167 shared_ptr<const SoundAsset> other_sound = dynamic_pointer_cast<const SoundAsset> (other);
169 shared_ptr<const SoundAssetReader> reader = start_read ();
170 shared_ptr<const SoundAssetReader> other_reader = other_sound->start_read ();
172 for (int i = 0; i < _intrinsic_duration; ++i) {
174 shared_ptr<const SoundFrame> frame_A = reader->get_frame (i);
175 shared_ptr<const SoundFrame> frame_B = other_reader->get_frame (i);
177 if (frame_A->size() != frame_B->size()) {
178 note (DCP_ERROR, String::compose ("sizes of audio data for frame %1 differ", i));
182 if (memcmp (frame_A->data(), frame_B->data(), frame_A->size()) != 0) {
183 for (int i = 0; i < frame_A->size(); ++i) {
184 int const d = abs (frame_A->data()[i] - frame_B->data()[i]);
185 if (d > opt.max_audio_sample_error) {
186 note (DCP_ERROR, String::compose ("PCM data difference of %1", d));
196 shared_ptr<SoundAssetWriter>
197 SoundAsset::start_write (boost::filesystem::path file, Standard standard)
199 /* XXX: can't we use a shared_ptr here? */
200 return shared_ptr<SoundAssetWriter> (new SoundAssetWriter (this, file, standard));
203 shared_ptr<SoundAssetReader>
204 SoundAsset::start_read () const
206 return shared_ptr<SoundAssetReader> (new SoundAssetReader (this));
210 SoundAsset::pkl_type (Standard standard) const
214 return "application/x-smpte-mxf;asdcpKind=Sound";
216 return "application/mxf";
223 SoundAsset::valid_mxf (boost::filesystem::path file)
225 ASDCP::PCM::MXFReader reader;
226 Kumu::Result_t r = reader.OpenRead (file.string().c_str ());
227 return !ASDCP_FAILURE (r);