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,
48 boost::signals2::signal<void (float)>* progress,
49 int fps, int intrinsic_duration, int start_frame
51 : MXFAsset (directory, mxf_name, progress, fps, intrinsic_duration)
52 , _channels (files.size ())
54 , _start_frame (start_frame)
58 construct (boost::bind (&SoundAsset::path_from_channel, this, _1, files));
61 SoundAsset::SoundAsset (
62 boost::function<string (Channel)> get_path,
65 boost::signals2::signal<void (float)>* progress,
66 int fps, int intrinsic_duration, int start_frame, int channels
68 : MXFAsset (directory, mxf_name, progress, fps, intrinsic_duration)
69 , _channels (channels)
71 , _start_frame (start_frame)
78 SoundAsset::SoundAsset (string directory, string mxf_name)
79 : MXFAsset (directory, mxf_name)
83 ASDCP::PCM::MXFReader reader;
84 if (ASDCP_FAILURE (reader.OpenRead (path().string().c_str()))) {
85 throw MXFFileError ("could not open MXF file for reading", path().string());
88 ASDCP::PCM::AudioDescriptor desc;
89 if (ASDCP_FAILURE (reader.FillAudioDescriptor (desc))) {
90 throw DCPReadError ("could not read audio MXF information");
93 _sampling_rate = desc.AudioSamplingRate.Numerator / desc.AudioSamplingRate.Denominator;
94 _channels = desc.ChannelCount;
95 _edit_rate = desc.EditRate.Numerator;
96 assert (desc.EditRate.Denominator == 1);
97 _intrinsic_duration = desc.ContainerDuration;
100 SoundAsset::SoundAsset (string directory, string mxf_name, int fps, int channels, int sampling_rate)
101 : MXFAsset (directory, mxf_name, 0, fps, 0)
102 , _channels (channels)
103 , _sampling_rate (sampling_rate)
110 SoundAsset::path_from_channel (Channel channel, vector<string> const & files)
112 unsigned int const c = int (channel);
113 assert (c < files.size ());
118 SoundAsset::construct (boost::function<string (Channel)> get_path)
120 ASDCP::Rational asdcp_edit_rate (_edit_rate, 1);
122 ASDCP::PCM::WAVParser pcm_parser_channel[_channels];
123 if (pcm_parser_channel[0].OpenRead (get_path(LEFT).c_str(), asdcp_edit_rate)) {
124 throw FileError ("could not open WAV file for reading", get_path(LEFT));
127 ASDCP::PCM::AudioDescriptor audio_desc;
128 pcm_parser_channel[0].FillAudioDescriptor (audio_desc);
129 audio_desc.ChannelCount = 0;
130 audio_desc.BlockAlign = 0;
131 audio_desc.EditRate = asdcp_edit_rate;
132 audio_desc.AvgBps = audio_desc.AvgBps * _channels;
134 Channel channels[] = {
141 /* XXX: not quite sure what these should be yet */
146 assert (int(_channels) <= int(sizeof(channels) / sizeof(Channel)));
148 ASDCP::PCM::FrameBuffer frame_buffer_channel[_channels];
149 ASDCP::PCM::AudioDescriptor audio_desc_channel[_channels];
151 for (int i = 0; i < _channels; ++i) {
153 string const path = get_path (channels[i]);
155 if (ASDCP_FAILURE (pcm_parser_channel[i].OpenRead (path.c_str(), asdcp_edit_rate))) {
156 throw FileError ("could not open WAV file for reading", path);
159 pcm_parser_channel[i].FillAudioDescriptor (audio_desc_channel[i]);
160 frame_buffer_channel[i].Capacity (ASDCP::PCM::CalcFrameBufferSize (audio_desc_channel[i]));
162 audio_desc.ChannelCount += audio_desc_channel[i].ChannelCount;
163 audio_desc.BlockAlign += audio_desc_channel[i].BlockAlign;
166 ASDCP::PCM::FrameBuffer frame_buffer;
167 frame_buffer.Capacity (ASDCP::PCM::CalcFrameBufferSize (audio_desc));
168 frame_buffer.Size (ASDCP::PCM::CalcFrameBufferSize (audio_desc));
170 ASDCP::WriterInfo writer_info;
171 MXFAsset::fill_writer_info (&writer_info, _uuid);
173 ASDCP::PCM::MXFWriter mxf_writer;
174 if (ASDCP_FAILURE (mxf_writer.OpenWrite (path().string().c_str(), writer_info, audio_desc))) {
175 throw FileError ("could not open audio MXF for writing", path().string());
178 /* Skip through up to our _start_frame; this is pretty inefficient... */
179 for (int i = 0; i < _start_frame; ++i) {
180 for (int j = 0; j < _channels; ++j) {
181 if (ASDCP_FAILURE (pcm_parser_channel[j].ReadFrame (frame_buffer_channel[j]))) {
182 throw MiscError ("could not read audio frame");
187 for (int i = 0; i < _intrinsic_duration; ++i) {
189 for (int j = 0; j < _channels; ++j) {
190 memset (frame_buffer_channel[j].Data(), 0, frame_buffer_channel[j].Capacity());
191 if (ASDCP_FAILURE (pcm_parser_channel[j].ReadFrame (frame_buffer_channel[j]))) {
192 throw MiscError ("could not read audio frame");
196 byte_t *data_s = frame_buffer.Data();
197 byte_t *data_e = data_s + frame_buffer.Capacity();
198 byte_t sample_size = ASDCP::PCM::CalcSampleSize (audio_desc_channel[0]);
201 while (data_s < data_e) {
202 for (int j = 0; j < _channels; ++j) {
203 byte_t* frame = frame_buffer_channel[j].Data() + offset;
204 memcpy (data_s, frame, sample_size);
205 data_s += sample_size;
207 offset += sample_size;
210 if (ASDCP_FAILURE (mxf_writer.WriteFrame (frame_buffer, 0, 0))) {
211 throw MiscError ("could not write audio MXF frame");
215 (*_progress) (0.5 * float (i) / _intrinsic_duration);
219 if (ASDCP_FAILURE (mxf_writer.Finalize())) {
220 throw MiscError ("could not finalise audio MXF");
225 SoundAsset::write_to_cpl (ostream& s) const
227 s << " <MainSound>\n"
228 << " <Id>urn:uuid:" << _uuid << "</Id>\n"
229 << " <AnnotationText>" << _file_name << "</AnnotationText>\n"
230 << " <EditRate>" << _edit_rate << " 1</EditRate>\n"
231 << " <IntrinsicDuration>" << _intrinsic_duration << "</IntrinsicDuration>\n"
232 << " <EntryPoint>" << _entry_point << "</EntryPoint>\n"
233 << " <Duration>" << _duration << "</Duration>\n"
234 << " </MainSound>\n";
238 SoundAsset::equals (shared_ptr<const Asset> other, EqualityOptions opt, list<string>& notes) const
240 if (!MXFAsset::equals (other, opt, notes)) {
244 ASDCP::PCM::MXFReader reader_A;
245 if (ASDCP_FAILURE (reader_A.OpenRead (path().string().c_str()))) {
246 throw MXFFileError ("could not open MXF file for reading", path().string());
249 ASDCP::PCM::MXFReader reader_B;
250 if (ASDCP_FAILURE (reader_B.OpenRead (other->path().string().c_str()))) {
251 throw MXFFileError ("could not open MXF file for reading", path().string());
254 ASDCP::PCM::AudioDescriptor desc_A;
255 if (ASDCP_FAILURE (reader_A.FillAudioDescriptor (desc_A))) {
256 throw DCPReadError ("could not read audio MXF information");
258 ASDCP::PCM::AudioDescriptor desc_B;
259 if (ASDCP_FAILURE (reader_B.FillAudioDescriptor (desc_B))) {
260 throw DCPReadError ("could not read audio MXF information");
264 desc_A.EditRate != desc_B.EditRate ||
265 desc_A.AudioSamplingRate != desc_B.AudioSamplingRate ||
266 desc_A.Locked != desc_B.Locked ||
267 desc_A.ChannelCount != desc_B.ChannelCount ||
268 desc_A.QuantizationBits != desc_B.QuantizationBits ||
269 desc_A.BlockAlign != desc_B.BlockAlign ||
270 desc_A.AvgBps != desc_B.AvgBps ||
271 desc_A.LinkedTrackID != desc_B.LinkedTrackID ||
272 desc_A.ContainerDuration != desc_B.ContainerDuration
273 // desc_A.ChannelFormat != desc_B.ChannelFormat ||
276 notes.push_back ("audio MXF picture descriptors differ");
280 ASDCP::PCM::FrameBuffer buffer_A (1 * Kumu::Megabyte);
281 ASDCP::PCM::FrameBuffer buffer_B (1 * Kumu::Megabyte);
283 for (int i = 0; i < _intrinsic_duration; ++i) {
284 if (ASDCP_FAILURE (reader_A.ReadFrame (i, buffer_A))) {
285 throw DCPReadError ("could not read audio frame");
288 if (ASDCP_FAILURE (reader_B.ReadFrame (i, buffer_B))) {
289 throw DCPReadError ("could not read audio frame");
292 if (buffer_A.Size() != buffer_B.Size()) {
293 notes.push_back ("sizes of audio data for frame " + lexical_cast<string>(i) + " differ");
297 if (memcmp (buffer_A.RoData(), buffer_B.RoData(), buffer_A.Size()) != 0) {
298 for (uint32_t i = 0; i < buffer_A.Size(); ++i) {
299 int const d = abs (buffer_A.RoData()[i] - buffer_B.RoData()[i]);
300 if (d > opt.max_audio_sample_error) {
301 notes.push_back ("PCM data difference of " + lexical_cast<string> (d));
311 shared_ptr<const SoundFrame>
312 SoundAsset::get_frame (int n) const
314 return shared_ptr<const SoundFrame> (new SoundFrame (path().string(), n + _entry_point));
317 shared_ptr<SoundAssetWriter>
318 SoundAsset::start_write ()
320 /* XXX: can't we use a shared_ptr here? */
321 return shared_ptr<SoundAssetWriter> (new SoundAssetWriter (this));
324 SoundAssetWriter::SoundAssetWriter (SoundAsset* a)
327 , _frames_written (0)
328 , _frame_buffer_offset (0)
330 /* Derived from ASDCP::Wav::SimpleWaveHeader::FillADesc */
331 _audio_desc.EditRate = ASDCP::Rational (_asset->edit_rate(), 1);
332 _audio_desc.AudioSamplingRate = ASDCP::Rational (_asset->sampling_rate(), 1);
333 _audio_desc.Locked = 0;
334 _audio_desc.ChannelCount = _asset->channels ();
335 _audio_desc.QuantizationBits = 24;
336 _audio_desc.BlockAlign = 3 * _asset->channels();
337 _audio_desc.AvgBps = _asset->sampling_rate() * _audio_desc.BlockAlign;
338 _audio_desc.LinkedTrackID = 0;
339 _audio_desc.ChannelFormat = ASDCP::PCM::CF_NONE;
341 _frame_buffer.Capacity (ASDCP::PCM::CalcFrameBufferSize (_audio_desc));
342 _frame_buffer.Size (ASDCP::PCM::CalcFrameBufferSize (_audio_desc));
343 memset (_frame_buffer.Data(), 0, _frame_buffer.Capacity());
345 MXFAsset::fill_writer_info (&_writer_info, _asset->uuid ());
347 if (ASDCP_FAILURE (_mxf_writer.OpenWrite (_asset->path().c_str(), _writer_info, _audio_desc))) {
348 throw FileError ("could not open audio MXF for writing", _asset->path().string());
353 SoundAssetWriter::write (float const * const * data, int frames)
355 for (int i = 0; i < frames; ++i) {
357 byte_t* out = _frame_buffer.Data() + _frame_buffer_offset;
359 /* Write one sample per channel */
360 for (int j = 0; j < _asset->channels(); ++j) {
361 int32_t const s = data[j][i] * (1 << 23);
363 *out++ = (s & 0xff00) >> 8;
364 *out++ = (s & 0xff0000) >> 16;
366 _frame_buffer_offset += 3 * _asset->channels();
368 assert (_frame_buffer_offset <= int (_frame_buffer.Capacity()));
370 /* Finish the MXF frame if required */
371 if (_frame_buffer_offset == int (_frame_buffer.Capacity())) {
372 write_current_frame ();
373 _frame_buffer_offset = 0;
374 memset (_frame_buffer.Data(), 0, _frame_buffer.Capacity());
380 SoundAssetWriter::write_current_frame ()
382 if (ASDCP_FAILURE (_mxf_writer.WriteFrame (_frame_buffer, 0, 0))) {
383 throw MiscError ("could not write audio MXF frame");
390 SoundAssetWriter::finalize ()
392 if (_frame_buffer_offset > 0) {
393 write_current_frame ();
396 if (ASDCP_FAILURE (_mxf_writer.Finalize())) {
397 throw MiscError ("could not finalise audio MXF");
401 _asset->set_intrinsic_duration (_frames_written);
402 _asset->set_duration (_frames_written);
405 SoundAssetWriter::~SoundAssetWriter ()