2 Copyright (C) 2012-2016 Carl Hetherington <cth@carlh.net>
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2 of the License, or
7 (at your option) any later version.
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software
16 Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20 /** @file src/sound_mxf.cc
21 * @brief SoundAsset class.
24 #include "sound_asset.h"
26 #include "exceptions.h"
27 #include "sound_frame.h"
28 #include "sound_asset_writer.h"
29 #include "compose.hpp"
30 #include "KM_fileio.h"
32 #include "dcp_assert.h"
33 #include <libxml++/nodes/element.h>
34 #include <boost/filesystem.hpp>
39 using std::stringstream;
43 using boost::shared_ptr;
46 SoundAsset::SoundAsset (boost::filesystem::path file)
49 ASDCP::PCM::MXFReader reader;
50 Kumu::Result_t r = reader.OpenRead (file.string().c_str());
51 if (ASDCP_FAILURE (r)) {
52 boost::throw_exception (MXFFileError ("could not open MXF file for reading", file.string(), r));
55 ASDCP::PCM::AudioDescriptor desc;
56 if (ASDCP_FAILURE (reader.FillAudioDescriptor (desc))) {
57 boost::throw_exception (DCPReadError ("could not read audio MXF information"));
60 _sampling_rate = desc.AudioSamplingRate.Numerator / desc.AudioSamplingRate.Denominator;
61 _channels = desc.ChannelCount;
62 _edit_rate = Fraction (desc.EditRate.Numerator, desc.EditRate.Denominator);
64 _intrinsic_duration = desc.ContainerDuration;
66 ASDCP::WriterInfo info;
67 if (ASDCP_FAILURE (reader.FillWriterInfo (info))) {
68 boost::throw_exception (DCPReadError ("could not read audio MXF information"));
71 _id = read_writer_info (info);
74 SoundAsset::SoundAsset (Fraction edit_rate, int sampling_rate, int channels)
75 : _edit_rate (edit_rate)
76 , _intrinsic_duration (0)
77 , _channels (channels)
78 , _sampling_rate (sampling_rate)
84 SoundAsset::equals (shared_ptr<const Asset> other, EqualityOptions opt, NoteHandler note) const
86 ASDCP::PCM::MXFReader reader_A;
87 Kumu::Result_t r = reader_A.OpenRead (file().string().c_str());
88 if (ASDCP_FAILURE (r)) {
89 boost::throw_exception (MXFFileError ("could not open MXF file for reading", file().string(), r));
92 ASDCP::PCM::MXFReader reader_B;
93 r = reader_B.OpenRead (other->file().string().c_str());
94 if (ASDCP_FAILURE (r)) {
95 boost::throw_exception (MXFFileError ("could not open MXF file for reading", file().string(), r));
98 ASDCP::PCM::AudioDescriptor desc_A;
99 if (ASDCP_FAILURE (reader_A.FillAudioDescriptor (desc_A))) {
100 boost::throw_exception (DCPReadError ("could not read audio MXF information"));
102 ASDCP::PCM::AudioDescriptor desc_B;
103 if (ASDCP_FAILURE (reader_B.FillAudioDescriptor (desc_B))) {
104 boost::throw_exception (DCPReadError ("could not read audio MXF information"));
108 desc_A.EditRate != desc_B.EditRate ||
109 desc_A.AudioSamplingRate != desc_B.AudioSamplingRate ||
110 desc_A.Locked != desc_B.Locked ||
111 desc_A.ChannelCount != desc_B.ChannelCount ||
112 desc_A.QuantizationBits != desc_B.QuantizationBits ||
113 desc_A.BlockAlign != desc_B.BlockAlign ||
114 desc_A.AvgBps != desc_B.AvgBps ||
115 desc_A.LinkedTrackID != desc_B.LinkedTrackID ||
116 desc_A.ContainerDuration != desc_B.ContainerDuration
117 // desc_A.ChannelFormat != desc_B.ChannelFormat ||
120 note (DCP_ERROR, "audio MXF picture descriptors differ");
124 ASDCP::PCM::FrameBuffer buffer_A (1 * Kumu::Megabyte);
125 ASDCP::PCM::FrameBuffer buffer_B (1 * Kumu::Megabyte);
127 for (int i = 0; i < _intrinsic_duration; ++i) {
128 if (ASDCP_FAILURE (reader_A.ReadFrame (i, buffer_A))) {
129 boost::throw_exception (DCPReadError ("could not read audio frame"));
132 if (ASDCP_FAILURE (reader_B.ReadFrame (i, buffer_B))) {
133 boost::throw_exception (DCPReadError ("could not read audio frame"));
136 if (buffer_A.Size() != buffer_B.Size()) {
137 note (DCP_ERROR, String::compose ("sizes of audio data for frame %1 differ", i));
141 if (memcmp (buffer_A.RoData(), buffer_B.RoData(), buffer_A.Size()) != 0) {
142 for (uint32_t i = 0; i < buffer_A.Size(); ++i) {
143 int const d = abs (buffer_A.RoData()[i] - buffer_B.RoData()[i]);
144 if (d > opt.max_audio_sample_error) {
145 note (DCP_ERROR, String::compose ("PCM data difference of %1", d));
155 shared_ptr<const SoundFrame>
156 SoundAsset::get_frame (int n) const
158 /* XXX: should add on entry point here? */
159 return shared_ptr<const SoundFrame> (new SoundFrame (file(), n, _decryption_context));
162 shared_ptr<SoundAssetWriter>
163 SoundAsset::start_write (boost::filesystem::path file, Standard standard)
165 /* XXX: can't we use a shared_ptr here? */
166 return shared_ptr<SoundAssetWriter> (new SoundAssetWriter (this, file, standard));
170 SoundAsset::pkl_type (Standard standard) const
174 return "application/x-smpte-mxf;asdcpKind=Sound";
176 return "application/mxf";
183 SoundAsset::valid_mxf (boost::filesystem::path file)
185 ASDCP::PCM::MXFReader reader;
186 Kumu::Result_t r = reader.OpenRead (file.string().c_str ());
187 return !ASDCP_FAILURE (r);