2 Copyright (C) 2012-2014 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 SoundMXF class.
24 #include "sound_mxf.h"
26 #include "exceptions.h"
27 #include "sound_frame.h"
28 #include "sound_mxf_writer.h"
29 #include "compose.hpp"
30 #include "KM_fileio.h"
32 #include <libxml++/nodes/element.h>
33 #include <boost/filesystem.hpp>
38 using std::stringstream;
42 using boost::shared_ptr;
45 SoundMXF::SoundMXF (boost::filesystem::path file)
47 , _intrinsic_duration (0)
51 ASDCP::PCM::MXFReader reader;
52 Kumu::Result_t r = reader.OpenRead (file.string().c_str());
53 if (ASDCP_FAILURE (r)) {
54 boost::throw_exception (MXFFileError ("could not open MXF file for reading", file.string(), r));
57 ASDCP::PCM::AudioDescriptor desc;
58 if (ASDCP_FAILURE (reader.FillAudioDescriptor (desc))) {
59 boost::throw_exception (DCPReadError ("could not read audio MXF information"));
62 _sampling_rate = desc.AudioSamplingRate.Numerator / desc.AudioSamplingRate.Denominator;
63 _channels = desc.ChannelCount;
64 _edit_rate = Fraction (desc.EditRate.Numerator, desc.EditRate.Denominator);
66 _intrinsic_duration = desc.ContainerDuration;
68 ASDCP::WriterInfo info;
69 if (ASDCP_FAILURE (reader.FillWriterInfo (info))) {
70 boost::throw_exception (DCPReadError ("could not read audio MXF information"));
73 read_writer_info (info);
77 SoundMXF::SoundMXF (Fraction edit_rate, int sampling_rate, int channels)
78 : _edit_rate (edit_rate)
79 , _intrinsic_duration (0)
80 , _channels (channels)
81 , _sampling_rate (sampling_rate)
87 SoundMXF::equals (shared_ptr<const Asset> other, EqualityOptions opt, NoteHandler note) const
89 if (!MXF::equals (other, opt, note)) {
93 ASDCP::PCM::MXFReader reader_A;
94 Kumu::Result_t r = reader_A.OpenRead (file().string().c_str());
95 if (ASDCP_FAILURE (r)) {
96 boost::throw_exception (MXFFileError ("could not open MXF file for reading", file().string(), r));
99 ASDCP::PCM::MXFReader reader_B;
100 r = reader_B.OpenRead (other->file().string().c_str());
101 if (ASDCP_FAILURE (r)) {
102 boost::throw_exception (MXFFileError ("could not open MXF file for reading", file().string(), r));
105 ASDCP::PCM::AudioDescriptor desc_A;
106 if (ASDCP_FAILURE (reader_A.FillAudioDescriptor (desc_A))) {
107 boost::throw_exception (DCPReadError ("could not read audio MXF information"));
109 ASDCP::PCM::AudioDescriptor desc_B;
110 if (ASDCP_FAILURE (reader_B.FillAudioDescriptor (desc_B))) {
111 boost::throw_exception (DCPReadError ("could not read audio MXF information"));
115 desc_A.EditRate != desc_B.EditRate ||
116 desc_A.AudioSamplingRate != desc_B.AudioSamplingRate ||
117 desc_A.Locked != desc_B.Locked ||
118 desc_A.ChannelCount != desc_B.ChannelCount ||
119 desc_A.QuantizationBits != desc_B.QuantizationBits ||
120 desc_A.BlockAlign != desc_B.BlockAlign ||
121 desc_A.AvgBps != desc_B.AvgBps ||
122 desc_A.LinkedTrackID != desc_B.LinkedTrackID ||
123 desc_A.ContainerDuration != desc_B.ContainerDuration
124 // desc_A.ChannelFormat != desc_B.ChannelFormat ||
127 note (DCP_ERROR, "audio MXF picture descriptors differ");
131 ASDCP::PCM::FrameBuffer buffer_A (1 * Kumu::Megabyte);
132 ASDCP::PCM::FrameBuffer buffer_B (1 * Kumu::Megabyte);
134 for (int i = 0; i < _intrinsic_duration; ++i) {
135 if (ASDCP_FAILURE (reader_A.ReadFrame (i, buffer_A))) {
136 boost::throw_exception (DCPReadError ("could not read audio frame"));
139 if (ASDCP_FAILURE (reader_B.ReadFrame (i, buffer_B))) {
140 boost::throw_exception (DCPReadError ("could not read audio frame"));
143 if (buffer_A.Size() != buffer_B.Size()) {
144 note (DCP_ERROR, String::compose ("sizes of audio data for frame %1 differ", i));
148 if (memcmp (buffer_A.RoData(), buffer_B.RoData(), buffer_A.Size()) != 0) {
149 for (uint32_t i = 0; i < buffer_A.Size(); ++i) {
150 int const d = abs (buffer_A.RoData()[i] - buffer_B.RoData()[i]);
151 if (d > opt.max_audio_sample_error) {
152 note (DCP_ERROR, String::compose ("PCM data difference of %1", d));
162 shared_ptr<const SoundFrame>
163 SoundMXF::get_frame (int n) const
165 /* XXX: should add on entry point here? */
166 return shared_ptr<const SoundFrame> (new SoundFrame (file(), n, _decryption_context));
169 shared_ptr<SoundMXFWriter>
170 SoundMXF::start_write (boost::filesystem::path file, Standard standard)
172 /* XXX: can't we use a shared_ptr here? */
173 return shared_ptr<SoundMXFWriter> (new SoundMXFWriter (this, file, standard));