2 Copyright (C) 2012 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_asset.cc
21 * @brief An asset made up of WAV files
26 #include <boost/filesystem.hpp>
27 #include <boost/lexical_cast.hpp>
28 #include "KM_fileio.h"
30 #include "sound_asset.h"
32 #include "exceptions.h"
33 #include "sound_frame.h"
36 using std::stringstream;
40 using boost::shared_ptr;
41 using boost::lexical_cast;
42 using namespace libdcp;
44 SoundAsset::SoundAsset (
45 vector<string> const & files, string directory, string mxf_name, boost::signals2::signal<void (float)>* progress, int fps, int length
47 : MXFAsset (directory, mxf_name, progress, fps, 0, length)
48 , _channels (files.size ())
51 construct (boost::bind (&SoundAsset::path_from_channel, this, _1, files));
54 SoundAsset::SoundAsset (
55 boost::function<string (Channel)> get_path,
58 boost::signals2::signal<void (float)>* progress,
59 int fps, int length, int channels
61 : MXFAsset (directory, mxf_name, progress, fps, 0, length)
62 , _channels (channels)
68 SoundAsset::SoundAsset (string directory, string mxf_name, int fps, int entry_point, int length)
69 : MXFAsset (directory, mxf_name, 0, fps, entry_point, length)
72 ASDCP::PCM::MXFReader reader;
73 if (ASDCP_FAILURE (reader.OpenRead (path().string().c_str()))) {
74 throw MXFFileError ("could not open MXF file for reading", path().string());
78 ASDCP::PCM::AudioDescriptor desc;
79 if (ASDCP_FAILURE (reader.FillAudioDescriptor (desc))) {
80 throw DCPReadError ("could not read audio MXF information");
83 _sampling_rate = desc.AudioSamplingRate.Numerator / desc.AudioSamplingRate.Denominator;
84 _channels = desc.ChannelCount;
88 SoundAsset::path_from_channel (Channel channel, vector<string> const & files)
90 unsigned int const c = int (channel);
91 assert (c < files.size ());
96 SoundAsset::construct (boost::function<string (Channel)> get_path)
98 ASDCP::Rational asdcp_fps (_fps, 1);
100 ASDCP::PCM::WAVParser pcm_parser_channel[_channels];
101 if (pcm_parser_channel[0].OpenRead (get_path(LEFT).c_str(), asdcp_fps)) {
102 throw FileError ("could not open WAV file for reading", get_path(LEFT));
105 ASDCP::PCM::AudioDescriptor audio_desc;
106 pcm_parser_channel[0].FillAudioDescriptor (audio_desc);
107 audio_desc.ChannelCount = 0;
108 audio_desc.BlockAlign = 0;
109 audio_desc.EditRate = asdcp_fps;
110 audio_desc.AvgBps = audio_desc.AvgBps * _channels;
112 Channel channels[] = {
121 ASDCP::PCM::FrameBuffer frame_buffer_channel[_channels];
122 ASDCP::PCM::AudioDescriptor audio_desc_channel[_channels];
124 for (int i = 0; i < _channels; ++i) {
126 string const path = get_path (channels[i]);
128 if (ASDCP_FAILURE (pcm_parser_channel[i].OpenRead (path.c_str(), asdcp_fps))) {
129 throw FileError ("could not open WAV file for reading", path);
132 pcm_parser_channel[i].FillAudioDescriptor (audio_desc_channel[i]);
133 frame_buffer_channel[i].Capacity (ASDCP::PCM::CalcFrameBufferSize (audio_desc_channel[i]));
135 audio_desc.ChannelCount += audio_desc_channel[i].ChannelCount;
136 audio_desc.BlockAlign += audio_desc_channel[i].BlockAlign;
139 ASDCP::PCM::FrameBuffer frame_buffer;
140 frame_buffer.Capacity (ASDCP::PCM::CalcFrameBufferSize (audio_desc));
141 frame_buffer.Size (ASDCP::PCM::CalcFrameBufferSize (audio_desc));
143 ASDCP::WriterInfo writer_info;
144 fill_writer_info (&writer_info);
146 ASDCP::PCM::MXFWriter mxf_writer;
147 if (ASDCP_FAILURE (mxf_writer.OpenWrite (path().string().c_str(), writer_info, audio_desc))) {
148 throw FileError ("could not open audio MXF for writing", path().string());
151 for (int i = 0; i < _length; ++i) {
153 byte_t *data_s = frame_buffer.Data();
154 byte_t *data_e = data_s + frame_buffer.Capacity();
155 byte_t sample_size = ASDCP::PCM::CalcSampleSize (audio_desc_channel[0]);
158 for (int j = 0; j < _channels; ++j) {
159 memset (frame_buffer_channel[j].Data(), 0, frame_buffer_channel[j].Capacity());
160 if (ASDCP_FAILURE (pcm_parser_channel[j].ReadFrame (frame_buffer_channel[j]))) {
161 throw MiscError ("could not read audio frame");
164 if (frame_buffer_channel[j].Size() != frame_buffer_channel[j].Capacity()) {
166 s << "short audio frame; " << _channels << " channels, "
167 << frame_buffer_channel[j].Size() << " vs " << frame_buffer_channel[j].Capacity();
168 throw MiscError (s.str ());
172 while (data_s < data_e) {
173 for (int j = 0; j < _channels; ++j) {
174 byte_t* frame = frame_buffer_channel[j].Data() + offset;
175 memcpy (data_s, frame, sample_size);
176 data_s += sample_size;
178 offset += sample_size;
181 if (ASDCP_FAILURE (mxf_writer.WriteFrame (frame_buffer, 0, 0))) {
182 throw MiscError ("could not write audio MXF frame");
186 (*_progress) (0.5 * float (i) / _length);
190 if (ASDCP_FAILURE (mxf_writer.Finalize())) {
191 throw MiscError ("could not finalise audio MXF");
196 SoundAsset::write_to_cpl (ostream& s) const
198 s << " <MainSound>\n"
199 << " <Id>urn:uuid:" << _uuid << "</Id>\n"
200 << " <AnnotationText>" << _file_name << "</AnnotationText>\n"
201 << " <EditRate>" << _fps << " 1</EditRate>\n"
202 << " <IntrinsicDuration>" << _length << "</IntrinsicDuration>\n"
203 << " <EntryPoint>0</EntryPoint>\n"
204 << " <Duration>" << _length << "</Duration>\n"
205 << " </MainSound>\n";
209 SoundAsset::equals (shared_ptr<const Asset> other, EqualityOptions opt, list<string>& notes) const
211 if (!MXFAsset::equals (other, opt, notes)) {
215 ASDCP::PCM::MXFReader reader_A;
216 if (ASDCP_FAILURE (reader_A.OpenRead (path().string().c_str()))) {
217 throw MXFFileError ("could not open MXF file for reading", path().string());
220 ASDCP::PCM::MXFReader reader_B;
221 if (ASDCP_FAILURE (reader_B.OpenRead (other->path().string().c_str()))) {
222 throw MXFFileError ("could not open MXF file for reading", path().string());
225 ASDCP::PCM::AudioDescriptor desc_A;
226 if (ASDCP_FAILURE (reader_A.FillAudioDescriptor (desc_A))) {
227 throw DCPReadError ("could not read audio MXF information");
229 ASDCP::PCM::AudioDescriptor desc_B;
230 if (ASDCP_FAILURE (reader_B.FillAudioDescriptor (desc_B))) {
231 throw DCPReadError ("could not read audio MXF information");
235 desc_A.EditRate != desc_B.EditRate ||
236 desc_A.AudioSamplingRate != desc_B.AudioSamplingRate ||
237 desc_A.Locked != desc_B.Locked ||
238 desc_A.ChannelCount != desc_B.ChannelCount ||
239 desc_A.QuantizationBits != desc_B.QuantizationBits ||
240 desc_A.BlockAlign != desc_B.BlockAlign ||
241 desc_A.AvgBps != desc_B.AvgBps ||
242 desc_A.LinkedTrackID != desc_B.LinkedTrackID ||
243 desc_A.ContainerDuration != desc_B.ContainerDuration
244 // desc_A.ChannelFormat != desc_B.ChannelFormat ||
247 notes.push_back ("audio MXF picture descriptors differ");
251 ASDCP::PCM::FrameBuffer buffer_A (1 * Kumu::Megabyte);
252 ASDCP::PCM::FrameBuffer buffer_B (1 * Kumu::Megabyte);
254 for (int i = 0; i < _length; ++i) {
255 if (ASDCP_FAILURE (reader_A.ReadFrame (i, buffer_A))) {
256 throw DCPReadError ("could not read audio frame");
259 if (ASDCP_FAILURE (reader_B.ReadFrame (i, buffer_B))) {
260 throw DCPReadError ("could not read audio frame");
263 if (buffer_A.Size() != buffer_B.Size()) {
264 notes.push_back ("sizes of audio data for frame " + lexical_cast<string>(i) + " differ");
268 if (memcmp (buffer_A.RoData(), buffer_B.RoData(), buffer_A.Size()) != 0) {
269 for (uint32_t i = 0; i < buffer_A.Size(); ++i) {
270 int const d = abs (buffer_A.RoData()[i] - buffer_B.RoData()[i]);
271 if (d > opt.max_audio_sample_error) {
272 notes.push_back ("PCM data difference of " + lexical_cast<string> (d));
282 shared_ptr<const SoundFrame>
283 SoundAsset::get_frame (int n) const
285 return shared_ptr<const SoundFrame> (new SoundFrame (path().string(), n + _entry_point));