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, int start_frame
47 : MXFAsset (directory, mxf_name, progress, fps, 0, length)
48 , _channels (files.size ())
50 , _start_frame (start_frame)
54 construct (boost::bind (&SoundAsset::path_from_channel, this, _1, files));
57 SoundAsset::SoundAsset (
58 boost::function<string (Channel)> get_path,
61 boost::signals2::signal<void (float)>* progress,
62 int fps, int length, int start_frame, int channels
64 : MXFAsset (directory, mxf_name, progress, fps, 0, length)
65 , _channels (channels)
67 , _start_frame (start_frame)
74 SoundAsset::SoundAsset (string directory, string mxf_name, int fps, int entry_point, int length)
75 : MXFAsset (directory, mxf_name, 0, fps, entry_point, length)
79 ASDCP::PCM::MXFReader reader;
80 if (ASDCP_FAILURE (reader.OpenRead (path().string().c_str()))) {
81 throw MXFFileError ("could not open MXF file for reading", path().string());
85 ASDCP::PCM::AudioDescriptor desc;
86 if (ASDCP_FAILURE (reader.FillAudioDescriptor (desc))) {
87 throw DCPReadError ("could not read audio MXF information");
90 _sampling_rate = desc.AudioSamplingRate.Numerator / desc.AudioSamplingRate.Denominator;
91 _channels = desc.ChannelCount;
95 SoundAsset::path_from_channel (Channel channel, vector<string> const & files)
97 unsigned int const c = int (channel);
98 assert (c < files.size ());
103 SoundAsset::construct (boost::function<string (Channel)> get_path)
105 ASDCP::Rational asdcp_fps (_fps, 1);
107 ASDCP::PCM::WAVParser pcm_parser_channel[_channels];
108 if (pcm_parser_channel[0].OpenRead (get_path(LEFT).c_str(), asdcp_fps)) {
109 throw FileError ("could not open WAV file for reading", get_path(LEFT));
112 ASDCP::PCM::AudioDescriptor audio_desc;
113 pcm_parser_channel[0].FillAudioDescriptor (audio_desc);
114 audio_desc.ChannelCount = 0;
115 audio_desc.BlockAlign = 0;
116 audio_desc.EditRate = asdcp_fps;
117 audio_desc.AvgBps = audio_desc.AvgBps * _channels;
119 Channel channels[] = {
126 /* XXX: not quite sure what these should be yet */
131 assert (int(_channels) <= int(sizeof(channels) / sizeof(Channel)));
133 ASDCP::PCM::FrameBuffer frame_buffer_channel[_channels];
134 ASDCP::PCM::AudioDescriptor audio_desc_channel[_channels];
136 for (int i = 0; i < _channels; ++i) {
138 string const path = get_path (channels[i]);
140 if (ASDCP_FAILURE (pcm_parser_channel[i].OpenRead (path.c_str(), asdcp_fps))) {
141 throw FileError ("could not open WAV file for reading", path);
144 pcm_parser_channel[i].FillAudioDescriptor (audio_desc_channel[i]);
145 frame_buffer_channel[i].Capacity (ASDCP::PCM::CalcFrameBufferSize (audio_desc_channel[i]));
147 audio_desc.ChannelCount += audio_desc_channel[i].ChannelCount;
148 audio_desc.BlockAlign += audio_desc_channel[i].BlockAlign;
151 ASDCP::PCM::FrameBuffer frame_buffer;
152 frame_buffer.Capacity (ASDCP::PCM::CalcFrameBufferSize (audio_desc));
153 frame_buffer.Size (ASDCP::PCM::CalcFrameBufferSize (audio_desc));
155 ASDCP::WriterInfo writer_info;
156 fill_writer_info (&writer_info);
158 ASDCP::PCM::MXFWriter mxf_writer;
159 if (ASDCP_FAILURE (mxf_writer.OpenWrite (path().string().c_str(), writer_info, audio_desc))) {
160 throw FileError ("could not open audio MXF for writing", path().string());
163 /* Skip through up to our _start_frame; this is pretty inefficient... */
164 for (int i = 0; i < _start_frame; ++i) {
165 for (int j = 0; j < _channels; ++j) {
166 if (ASDCP_FAILURE (pcm_parser_channel[j].ReadFrame (frame_buffer_channel[j]))) {
167 throw MiscError ("could not read audio frame");
172 for (int i = 0; i < _length; ++i) {
174 for (int j = 0; j < _channels; ++j) {
175 memset (frame_buffer_channel[j].Data(), 0, frame_buffer_channel[j].Capacity());
176 if (ASDCP_FAILURE (pcm_parser_channel[j].ReadFrame (frame_buffer_channel[j]))) {
177 throw MiscError ("could not read audio frame");
181 byte_t *data_s = frame_buffer.Data();
182 byte_t *data_e = data_s + frame_buffer.Capacity();
183 byte_t sample_size = ASDCP::PCM::CalcSampleSize (audio_desc_channel[0]);
186 while (data_s < data_e) {
187 for (int j = 0; j < _channels; ++j) {
188 byte_t* frame = frame_buffer_channel[j].Data() + offset;
189 memcpy (data_s, frame, sample_size);
190 data_s += sample_size;
192 offset += sample_size;
195 if (ASDCP_FAILURE (mxf_writer.WriteFrame (frame_buffer, 0, 0))) {
196 throw MiscError ("could not write audio MXF frame");
200 (*_progress) (0.5 * float (i) / _length);
204 if (ASDCP_FAILURE (mxf_writer.Finalize())) {
205 throw MiscError ("could not finalise audio MXF");
210 SoundAsset::write_to_cpl (ostream& s) const
212 s << " <MainSound>\n"
213 << " <Id>urn:uuid:" << _uuid << "</Id>\n"
214 << " <AnnotationText>" << _file_name << "</AnnotationText>\n"
215 << " <EditRate>" << _fps << " 1</EditRate>\n"
216 << " <IntrinsicDuration>" << _length << "</IntrinsicDuration>\n"
217 << " <EntryPoint>0</EntryPoint>\n"
218 << " <Duration>" << _length << "</Duration>\n"
219 << " </MainSound>\n";
223 SoundAsset::equals (shared_ptr<const Asset> other, EqualityOptions opt, list<string>& notes) const
225 if (!MXFAsset::equals (other, opt, notes)) {
229 ASDCP::PCM::MXFReader reader_A;
230 if (ASDCP_FAILURE (reader_A.OpenRead (path().string().c_str()))) {
231 throw MXFFileError ("could not open MXF file for reading", path().string());
234 ASDCP::PCM::MXFReader reader_B;
235 if (ASDCP_FAILURE (reader_B.OpenRead (other->path().string().c_str()))) {
236 throw MXFFileError ("could not open MXF file for reading", path().string());
239 ASDCP::PCM::AudioDescriptor desc_A;
240 if (ASDCP_FAILURE (reader_A.FillAudioDescriptor (desc_A))) {
241 throw DCPReadError ("could not read audio MXF information");
243 ASDCP::PCM::AudioDescriptor desc_B;
244 if (ASDCP_FAILURE (reader_B.FillAudioDescriptor (desc_B))) {
245 throw DCPReadError ("could not read audio MXF information");
249 desc_A.EditRate != desc_B.EditRate ||
250 desc_A.AudioSamplingRate != desc_B.AudioSamplingRate ||
251 desc_A.Locked != desc_B.Locked ||
252 desc_A.ChannelCount != desc_B.ChannelCount ||
253 desc_A.QuantizationBits != desc_B.QuantizationBits ||
254 desc_A.BlockAlign != desc_B.BlockAlign ||
255 desc_A.AvgBps != desc_B.AvgBps ||
256 desc_A.LinkedTrackID != desc_B.LinkedTrackID ||
257 desc_A.ContainerDuration != desc_B.ContainerDuration
258 // desc_A.ChannelFormat != desc_B.ChannelFormat ||
261 notes.push_back ("audio MXF picture descriptors differ");
265 ASDCP::PCM::FrameBuffer buffer_A (1 * Kumu::Megabyte);
266 ASDCP::PCM::FrameBuffer buffer_B (1 * Kumu::Megabyte);
268 for (int i = 0; i < _length; ++i) {
269 if (ASDCP_FAILURE (reader_A.ReadFrame (i, buffer_A))) {
270 throw DCPReadError ("could not read audio frame");
273 if (ASDCP_FAILURE (reader_B.ReadFrame (i, buffer_B))) {
274 throw DCPReadError ("could not read audio frame");
277 if (buffer_A.Size() != buffer_B.Size()) {
278 notes.push_back ("sizes of audio data for frame " + lexical_cast<string>(i) + " differ");
282 if (memcmp (buffer_A.RoData(), buffer_B.RoData(), buffer_A.Size()) != 0) {
283 for (uint32_t i = 0; i < buffer_A.Size(); ++i) {
284 int const d = abs (buffer_A.RoData()[i] - buffer_B.RoData()[i]);
285 if (d > opt.max_audio_sample_error) {
286 notes.push_back ("PCM data difference of " + lexical_cast<string> (d));
296 shared_ptr<const SoundFrame>
297 SoundAsset::get_frame (int n) const
299 return shared_ptr<const SoundFrame> (new SoundFrame (path().string(), n + _entry_point));