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 <libxml++/nodes/element.h>
29 #include "KM_fileio.h"
31 #include "sound_asset.h"
33 #include "exceptions.h"
34 #include "sound_frame.h"
37 using std::stringstream;
41 using boost::shared_ptr;
42 using boost::lexical_cast;
43 using namespace libdcp;
45 SoundAsset::SoundAsset (
46 vector<string> const & files, string directory, string mxf_name, boost::signals2::signal<void (float)>* progress, int fps, int length, bool encrypted
48 : MXFAsset (directory, mxf_name, progress, fps, 0, length, encrypted)
49 , _channels (files.size ())
52 construct (boost::bind (&SoundAsset::path_from_channel, this, _1, files));
55 SoundAsset::SoundAsset (
56 boost::function<string (Channel)> get_path,
59 boost::signals2::signal<void (float)>* progress,
60 int fps, int length, int channels, bool encrypted
62 : MXFAsset (directory, mxf_name, progress, fps, 0, length, encrypted)
63 , _channels (channels)
69 SoundAsset::SoundAsset (string directory, string mxf_name, int fps, int entry_point, int length)
70 : MXFAsset (directory, mxf_name, 0, fps, entry_point, length, false)
73 ASDCP::PCM::MXFReader reader;
74 if (ASDCP_FAILURE (reader.OpenRead (path().string().c_str()))) {
75 throw MXFFileError ("could not open MXF file for reading", path().string());
79 ASDCP::PCM::AudioDescriptor desc;
80 if (ASDCP_FAILURE (reader.FillAudioDescriptor (desc))) {
81 throw DCPReadError ("could not read audio MXF information");
84 _sampling_rate = desc.AudioSamplingRate.Numerator / desc.AudioSamplingRate.Denominator;
85 _channels = desc.ChannelCount;
89 SoundAsset::path_from_channel (Channel channel, vector<string> const & files)
91 unsigned int const c = int (channel);
92 assert (c < files.size ());
97 SoundAsset::construct (boost::function<string (Channel)> get_path)
99 ASDCP::Rational asdcp_fps (_fps, 1);
101 ASDCP::PCM::WAVParser pcm_parser_channel[_channels];
102 if (pcm_parser_channel[0].OpenRead (get_path(LEFT).c_str(), asdcp_fps)) {
103 throw FileError ("could not open WAV file for reading", get_path(LEFT));
106 ASDCP::PCM::AudioDescriptor audio_desc;
107 pcm_parser_channel[0].FillAudioDescriptor (audio_desc);
108 audio_desc.ChannelCount = 0;
109 audio_desc.BlockAlign = 0;
110 audio_desc.EditRate = asdcp_fps;
111 audio_desc.AvgBps = audio_desc.AvgBps * _channels;
113 Channel channels[] = {
120 /* XXX: not quite sure what these should be yet */
125 assert (int(_channels) <= int(sizeof(channels) / sizeof(Channel)));
127 ASDCP::PCM::FrameBuffer frame_buffer_channel[_channels];
128 ASDCP::PCM::AudioDescriptor audio_desc_channel[_channels];
130 for (int i = 0; i < _channels; ++i) {
132 string const path = get_path (channels[i]);
134 if (ASDCP_FAILURE (pcm_parser_channel[i].OpenRead (path.c_str(), asdcp_fps))) {
135 throw FileError ("could not open WAV file for reading", path);
138 pcm_parser_channel[i].FillAudioDescriptor (audio_desc_channel[i]);
139 frame_buffer_channel[i].Capacity (ASDCP::PCM::CalcFrameBufferSize (audio_desc_channel[i]));
141 audio_desc.ChannelCount += audio_desc_channel[i].ChannelCount;
142 audio_desc.BlockAlign += audio_desc_channel[i].BlockAlign;
145 ASDCP::PCM::FrameBuffer frame_buffer;
146 frame_buffer.Capacity (ASDCP::PCM::CalcFrameBufferSize (audio_desc));
147 frame_buffer.Size (ASDCP::PCM::CalcFrameBufferSize (audio_desc));
149 ASDCP::WriterInfo writer_info;
150 fill_writer_info (&writer_info);
152 ASDCP::PCM::MXFWriter mxf_writer;
153 if (ASDCP_FAILURE (mxf_writer.OpenWrite (path().string().c_str(), writer_info, audio_desc))) {
154 throw FileError ("could not open audio MXF for writing", path().string());
157 for (int i = 0; i < _length; ++i) {
159 for (int j = 0; j < _channels; ++j) {
160 memset (frame_buffer_channel[j].Data(), 0, frame_buffer_channel[j].Capacity());
161 if (ASDCP_FAILURE (pcm_parser_channel[j].ReadFrame (frame_buffer_channel[j]))) {
162 throw MiscError ("could not read audio frame");
166 byte_t *data_s = frame_buffer.Data();
167 byte_t *data_e = data_s + frame_buffer.Capacity();
168 byte_t sample_size = ASDCP::PCM::CalcSampleSize (audio_desc_channel[0]);
171 while (data_s < data_e) {
172 for (int j = 0; j < _channels; ++j) {
173 byte_t* frame = frame_buffer_channel[j].Data() + offset;
174 memcpy (data_s, frame, sample_size);
175 data_s += sample_size;
177 offset += sample_size;
180 if (ASDCP_FAILURE (mxf_writer.WriteFrame (frame_buffer, _encryption_context, 0))) {
181 throw MiscError ("could not write audio MXF frame");
185 (*_progress) (0.5 * float (i) / _length);
189 if (ASDCP_FAILURE (mxf_writer.Finalize())) {
190 throw MiscError ("could not finalise audio MXF");
195 SoundAsset::write_to_cpl (xmlpp::Element* parent) const
197 xmlpp::Element* main_sound = parent->add_child("MainSound");
198 main_sound->add_child("Id")->add_child_text("urn:uuid:" + _uuid);
199 main_sound->add_child("AnnotationText")->add_child_text(_file_name);
200 main_sound->add_child("EditRate")->add_child_text(boost::lexical_cast<string> (_fps) + " 1");
201 main_sound->add_child("IntrinsicDuration")->add_child_text(boost::lexical_cast<string> (_length));
202 main_sound->add_child("EntryPoint")->add_child_text("0");
203 main_sound->add_child("Duration")->add_child_text(boost::lexical_cast<string> (_length));
205 main_sound->add_child("KeyId")->add_child_text("urn:uuid:" + _key_id);
210 SoundAsset::equals (shared_ptr<const Asset> other, EqualityOptions opt, list<string>& notes) const
212 if (!MXFAsset::equals (other, opt, notes)) {
216 ASDCP::PCM::MXFReader reader_A;
217 if (ASDCP_FAILURE (reader_A.OpenRead (path().string().c_str()))) {
218 throw MXFFileError ("could not open MXF file for reading", path().string());
221 ASDCP::PCM::MXFReader reader_B;
222 if (ASDCP_FAILURE (reader_B.OpenRead (other->path().string().c_str()))) {
223 throw MXFFileError ("could not open MXF file for reading", path().string());
226 ASDCP::PCM::AudioDescriptor desc_A;
227 if (ASDCP_FAILURE (reader_A.FillAudioDescriptor (desc_A))) {
228 throw DCPReadError ("could not read audio MXF information");
230 ASDCP::PCM::AudioDescriptor desc_B;
231 if (ASDCP_FAILURE (reader_B.FillAudioDescriptor (desc_B))) {
232 throw DCPReadError ("could not read audio MXF information");
236 desc_A.EditRate != desc_B.EditRate ||
237 desc_A.AudioSamplingRate != desc_B.AudioSamplingRate ||
238 desc_A.Locked != desc_B.Locked ||
239 desc_A.ChannelCount != desc_B.ChannelCount ||
240 desc_A.QuantizationBits != desc_B.QuantizationBits ||
241 desc_A.BlockAlign != desc_B.BlockAlign ||
242 desc_A.AvgBps != desc_B.AvgBps ||
243 desc_A.LinkedTrackID != desc_B.LinkedTrackID ||
244 desc_A.ContainerDuration != desc_B.ContainerDuration
245 // desc_A.ChannelFormat != desc_B.ChannelFormat ||
248 notes.push_back ("audio MXF picture descriptors differ");
252 ASDCP::PCM::FrameBuffer buffer_A (1 * Kumu::Megabyte);
253 ASDCP::PCM::FrameBuffer buffer_B (1 * Kumu::Megabyte);
255 for (int i = 0; i < _length; ++i) {
256 if (ASDCP_FAILURE (reader_A.ReadFrame (i, buffer_A))) {
257 throw DCPReadError ("could not read audio frame");
260 if (ASDCP_FAILURE (reader_B.ReadFrame (i, buffer_B))) {
261 throw DCPReadError ("could not read audio frame");
264 if (buffer_A.Size() != buffer_B.Size()) {
265 notes.push_back ("sizes of audio data for frame " + lexical_cast<string>(i) + " differ");
269 if (memcmp (buffer_A.RoData(), buffer_B.RoData(), buffer_A.Size()) != 0) {
270 for (uint32_t i = 0; i < buffer_A.Size(); ++i) {
271 int const d = abs (buffer_A.RoData()[i] - buffer_B.RoData()[i]);
272 if (d > opt.max_audio_sample_error) {
273 notes.push_back ("PCM data difference of " + lexical_cast<string> (d));
283 shared_ptr<const SoundFrame>
284 SoundAsset::get_frame (int n) const
286 return shared_ptr<const SoundFrame> (new SoundFrame (path().string(), n + _entry_point));