libs/ardour/export_graph_builder.cc

   1 /*
   2   Copyright (C) 2008-2012 Paul Davis
   3   Author: Sakari Bergen
   4
   5   This program is free software; you can redistribute it and/or modify
   6   it under the terms of the GNU General Public License as published by
   7   the Free Software Foundation; either version 2 of the License, or
   8   (at your option) any later version.
   9
  10   This program is distributed in the hope that it will be useful,
  11   but WITHOUT ANY WARRANTY; without even the implied warranty of
  12   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13   GNU General Public License for more details.
  14
  15   You should have received a copy of the GNU General Public License
  16   along with this program; if not, write to the Free Software
  17   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  18
  19 */
  20
  21 #include "ardour/export_graph_builder.h"
  22
  23 #include <vector>
  24
  25 #include <glibmm/miscutils.h>
  26
  27 #include "audiographer/process_context.h"
  28 #include "audiographer/general/chunker.h"
  29 #include "audiographer/general/interleaver.h"
  30 #include "audiographer/general/normalizer.h"
  31 #include "audiographer/general/analyser.h"
  32 #include "audiographer/general/peak_reader.h"
  33 #include "audiographer/general/loudness_reader.h"
  34 #include "audiographer/general/sample_format_converter.h"
  35 #include "audiographer/general/sr_converter.h"
  36 #include "audiographer/general/silence_trimmer.h"
  37 #include "audiographer/general/threader.h"
  38 #include "audiographer/sndfile/tmp_file.h"
  39 #include "audiographer/sndfile/tmp_file_rt.h"
  40 #include "audiographer/sndfile/tmp_file_sync.h"
  41 #include "audiographer/sndfile/sndfile_writer.h"
  42
  43 #include "ardour/audioengine.h"
  44 #include "ardour/export_channel_configuration.h"
  45 #include "ardour/export_filename.h"
  46 #include "ardour/export_format_specification.h"
  47 #include "ardour/export_timespan.h"
  48 #include "ardour/session_directory.h"
  49 #include "ardour/sndfile_helpers.h"
  50
  51 #include "pbd/file_utils.h"
  52 #include "pbd/cpus.h"
  53
  54 using namespace AudioGrapher;
  55 using std::string;
  56
  57 namespace ARDOUR {
  58
  59 ExportGraphBuilder::ExportGraphBuilder (Session const & session)
  60         : session (session)
  61         , thread_pool (hardware_concurrency())
  62 {
  63         process_buffer_frames = session.engine().samples_per_cycle();
  64 }
  65
  66 ExportGraphBuilder::~ExportGraphBuilder ()
  67 {
  68 }
  69
  70 int
  71 ExportGraphBuilder::process (framecnt_t frames, bool last_cycle)
  72 {
  73         assert(frames <= process_buffer_frames);
  74
  75         for (ChannelMap::iterator it = channels.begin(); it != channels.end(); ++it) {
  76                 Sample const * process_buffer = 0;
  77                 it->first->read (process_buffer, frames);
  78                 ConstProcessContext<Sample> context(process_buffer, frames, 1);
  79                 if (last_cycle) { context().set_flag (ProcessContext<Sample>::EndOfInput); }
  80                 it->second->process (context);
  81         }
  82
  83         return 0;
  84 }
  85
  86 bool
  87 ExportGraphBuilder::post_process ()
  88 {
  89         for (std::list<Intermediate *>::iterator it = intermediates.begin(); it != intermediates.end(); /* ++ in loop */) {
  90                 if ((*it)->process()) {
  91                         it = intermediates.erase (it);
  92                 } else {
  93                         ++it;
  94                 }
  95         }
  96
  97         return intermediates.empty();
  98 }
  99
 100 unsigned
 101 ExportGraphBuilder::get_postprocessing_cycle_count() const
 102 {
 103         unsigned max = 0;
 104         for (std::list<Intermediate *>::const_iterator it = intermediates.begin(); it != intermediates.end(); ++it) {
 105                 max = std::max(max, (*it)->get_postprocessing_cycle_count());
 106         }
 107         return max;
 108 }
 109
 110 void
 111 ExportGraphBuilder::reset ()
 112 {
 113         timespan.reset();
 114         channel_configs.clear ();
 115         channels.clear ();
 116         intermediates.clear ();
 117         analysis_map.clear();
 118         _realtime = false;
 119 }
 120
 121 void
 122 ExportGraphBuilder::cleanup (bool remove_out_files/*=false*/)
 123 {
 124         ChannelConfigList::iterator iter = channel_configs.begin();
 125
 126         while (iter != channel_configs.end() ) {
 127                 iter->remove_children(remove_out_files);
 128                 iter = channel_configs.erase(iter);
 129         }
 130 }
 131
 132 void
 133 ExportGraphBuilder::set_current_timespan (boost::shared_ptr<ExportTimespan> span)
 134 {
 135         timespan = span;
 136 }
 137
 138 void
 139 ExportGraphBuilder::add_config (FileSpec const & config, bool rt)
 140 {
 141         ExportChannelConfiguration::ChannelList const & channels =
 142                 config.channel_config->get_channels();
 143         for(ExportChannelConfiguration::ChannelList::const_iterator it = channels.begin();
 144             it != channels.end(); ++it) {
 145                 (*it)->set_max_buffer_size(process_buffer_frames);
 146         }
 147
 148         _realtime = rt;
 149
 150         // If the sample rate is "session rate", change it to the real value.
 151         // However, we need to copy it to not change the config which is saved...
 152         FileSpec new_config (config);
 153         new_config.format.reset(new ExportFormatSpecification(*new_config.format, false));
 154         if(new_config.format->sample_rate() == ExportFormatBase::SR_Session) {
 155                 framecnt_t session_rate = session.nominal_frame_rate();
 156                 new_config.format->set_sample_rate(ExportFormatBase::nearest_sample_rate(session_rate));
 157         }
 158
 159
 160         if (!new_config.channel_config->get_split ()) {
 161                 add_split_config (new_config);
 162                 return;
 163         }
 164
 165         // Split channel configurations are split into several channel configurations,
 166         // each corresponding to a file, at this stage
 167         typedef std::list<boost::shared_ptr<ExportChannelConfiguration> > ConfigList;
 168         ConfigList file_configs;
 169         new_config.channel_config->configurations_for_files (file_configs);
 170
 171         unsigned chan = 1;
 172         for (ConfigList::iterator it = file_configs.begin(); it != file_configs.end(); ++it, ++chan) {
 173                 FileSpec copy = new_config;
 174                 copy.channel_config = *it;
 175
 176                 copy.filename.reset (new ExportFilename (*copy.filename));
 177                 copy.filename->include_channel = true;
 178                 copy.filename->set_channel (chan);
 179
 180                 add_split_config (copy);
 181         }
 182 }
 183
 184 void
 185 ExportGraphBuilder::get_analysis_results (AnalysisResults& results) {
 186         for (AnalysisMap::iterator i = analysis_map.begin(); i != analysis_map.end(); ++i) {
 187                 ExportAnalysisPtr p = i->second->result ();
 188                 if (p) {
 189                         results.insert (std::make_pair (i->first, p));
 190                 }
 191         }
 192 }
 193
 194 void
 195 ExportGraphBuilder::add_split_config (FileSpec const & config)
 196 {
 197         for (ChannelConfigList::iterator it = channel_configs.begin(); it != channel_configs.end(); ++it) {
 198                 if (*it == config) {
 199                         it->add_child (config);
 200                         return;
 201                 }
 202         }
 203
 204         // No duplicate channel config found, create new one
 205         channel_configs.push_back (new ChannelConfig (*this, config, channels));
 206 }
 207
 208 /* Encoder */
 209
 210 template <>
 211 boost::shared_ptr<AudioGrapher::Sink<Sample> >
 212 ExportGraphBuilder::Encoder::init (FileSpec const & new_config)
 213 {
 214         config = new_config;
 215         init_writer (float_writer);
 216         return float_writer;
 217 }
 218
 219 template <>
 220 boost::shared_ptr<AudioGrapher::Sink<int> >
 221 ExportGraphBuilder::Encoder::init (FileSpec const & new_config)
 222 {
 223         config = new_config;
 224         init_writer (int_writer);
 225         return int_writer;
 226 }
 227
 228 template <>
 229 boost::shared_ptr<AudioGrapher::Sink<short> >
 230 ExportGraphBuilder::Encoder::init (FileSpec const & new_config)
 231 {
 232         config = new_config;
 233         init_writer (short_writer);
 234         return short_writer;
 235 }
 236
 237 void
 238 ExportGraphBuilder::Encoder::add_child (FileSpec const & new_config)
 239 {
 240         filenames.push_back (new_config.filename);
 241 }
 242
 243 void
 244 ExportGraphBuilder::Encoder::destroy_writer (bool delete_out_file)
 245 {
 246         if (delete_out_file ) {
 247
 248                 if (float_writer) {
 249                         float_writer->close ();
 250                 }
 251
 252                 if (int_writer) {
 253                         int_writer->close ();
 254                 }
 255
 256                 if (short_writer) {
 257                         short_writer->close ();
 258                 }
 259
 260                 if (std::remove(writer_filename.c_str() ) != 0) {
 261                         std::cout << "Encoder::destroy_writer () : Error removing file: " << strerror(errno) << std::endl;
 262                 }
 263         }
 264
 265         float_writer.reset ();
 266         int_writer.reset ();
 267         short_writer.reset ();
 268 }
 269
 270 bool
 271 ExportGraphBuilder::Encoder::operator== (FileSpec const & other_config) const
 272 {
 273         return get_real_format (config) == get_real_format (other_config);
 274 }
 275
 276 int
 277 ExportGraphBuilder::Encoder::get_real_format (FileSpec const & config)
 278 {
 279         ExportFormatSpecification & format = *config.format;
 280         return format.format_id() | format.sample_format() | format.endianness();
 281 }
 282
 283 template<typename T>
 284 void
 285 ExportGraphBuilder::Encoder::init_writer (boost::shared_ptr<AudioGrapher::SndfileWriter<T> > & writer)
 286 {
 287         unsigned channels = config.channel_config->get_n_chans();
 288         int format = get_real_format (config);
 289         config.filename->set_channel_config(config.channel_config);
 290         writer_filename = config.filename->get_path (config.format);
 291
 292         writer.reset (new AudioGrapher::SndfileWriter<T> (writer_filename, format, channels, config.format->sample_rate(), config.broadcast_info));
 293         writer->FileWritten.connect_same_thread (copy_files_connection, boost::bind (&ExportGraphBuilder::Encoder::copy_files, this, _1));
 294 }
 295
 296 void
 297 ExportGraphBuilder::Encoder::copy_files (std::string orig_path)
 298 {
 299         while (filenames.size()) {
 300                 ExportFilenamePtr & filename = filenames.front();
 301                 PBD::copy_file (orig_path, filename->get_path (config.format).c_str());
 302                 filenames.pop_front();
 303         }
 304 }
 305
 306 /* SFC */
 307
 308 ExportGraphBuilder::SFC::SFC (ExportGraphBuilder &parent, FileSpec const & new_config, framecnt_t max_frames)
 309         : data_width(0)
 310 {
 311         config = new_config;
 312         data_width = sndfile_data_width (Encoder::get_real_format (config));
 313         unsigned channels = new_config.channel_config->get_n_chans();
 314         _analyse = config.format->analyse();
 315         if (_analyse) {
 316                 framecnt_t sample_rate = parent.session.nominal_frame_rate();
 317                 framecnt_t sb = config.format->silence_beginning_at (parent.timespan->get_start(), sample_rate);
 318                 framecnt_t se = config.format->silence_end_at (parent.timespan->get_end(), sample_rate);
 319                 framecnt_t duration = parent.timespan->get_length () + sb + se;
 320                 max_frames = min ((framecnt_t) 8192 * channels, max ((framecnt_t) 4096 * channels, max_frames));
 321                 chunker.reset (new Chunker<Sample> (max_frames));
 322                 analyser.reset (new Analyser (config.format->sample_rate(), channels, max_frames,
 323                                         (framecnt_t) ceil (duration * config.format->sample_rate () / (double) sample_rate)));
 324                 chunker->add_output (analyser);
 325
 326                 config.filename->set_channel_config (config.channel_config);
 327                 parent.add_analyser (config.filename->get_path (config.format), analyser);
 328         }
 329
 330         if (data_width == 8 || data_width == 16) {
 331                 short_converter = ShortConverterPtr (new SampleFormatConverter<short> (channels));
 332                 short_converter->init (max_frames, config.format->dither_type(), data_width);
 333                 add_child (config);
 334                 if (_analyse) { analyser->add_output (short_converter); }
 335
 336         } else if (data_width == 24 || data_width == 32) {
 337                 int_converter = IntConverterPtr (new SampleFormatConverter<int> (channels));
 338                 int_converter->init (max_frames, config.format->dither_type(), data_width);
 339                 add_child (config);
 340                 if (_analyse) { analyser->add_output (int_converter); }
 341         } else {
 342                 int actual_data_width = 8 * sizeof(Sample);
 343                 float_converter = FloatConverterPtr (new SampleFormatConverter<Sample> (channels));
 344                 float_converter->init (max_frames, config.format->dither_type(), actual_data_width);
 345                 add_child (config);
 346                 if (_analyse) { analyser->add_output (float_converter); }
 347         }
 348 }
 349
 350 void
 351 ExportGraphBuilder::SFC::set_peak (float gain)
 352 {
 353         if (_analyse) {
 354                 analyser->set_normalization_gain (gain);
 355         }
 356 }
 357
 358 ExportGraphBuilder::FloatSinkPtr
 359 ExportGraphBuilder::SFC::sink ()
 360 {
 361         if (_analyse) {
 362                 return chunker;
 363         } else if (data_width == 8 || data_width == 16) {
 364                 return short_converter;
 365         } else if (data_width == 24 || data_width == 32) {
 366                 return int_converter;
 367         } else {
 368                 return float_converter;
 369         }
 370 }
 371
 372 void
 373 ExportGraphBuilder::SFC::add_child (FileSpec const & new_config)
 374 {
 375         for (boost::ptr_list<Encoder>::iterator it = children.begin(); it != children.end(); ++it) {
 376                 if (*it == new_config) {
 377                         it->add_child (new_config);
 378                         return;
 379                 }
 380         }
 381
 382         children.push_back (new Encoder());
 383         Encoder & encoder = children.back();
 384
 385         if (data_width == 8 || data_width == 16) {
 386                 short_converter->add_output (encoder.init<short> (new_config));
 387         } else if (data_width == 24 || data_width == 32) {
 388                 int_converter->add_output (encoder.init<int> (new_config));
 389         } else {
 390                 float_converter->add_output (encoder.init<Sample> (new_config));
 391         }
 392 }
 393
 394 void
 395 ExportGraphBuilder::SFC::remove_children (bool remove_out_files)
 396 {
 397         boost::ptr_list<Encoder>::iterator iter = children.begin ();
 398
 399         while (iter != children.end() ) {
 400
 401                 if (remove_out_files) {
 402                         iter->destroy_writer(remove_out_files);
 403                 }
 404                 iter = children.erase (iter);
 405         }
 406 }
 407
 408 bool
 409 ExportGraphBuilder::SFC::operator== (FileSpec const & other_config) const
 410 {
 411         return config.format->sample_format() == other_config.format->sample_format();
 412 }
 413
 414 /* Intermediate (Normalizer, TmpFile) */
 415
 416 ExportGraphBuilder::Intermediate::Intermediate (ExportGraphBuilder & parent, FileSpec const & new_config, framecnt_t max_frames)
 417         : parent (parent)
 418         , use_loudness (false)
 419         , use_peak (false)
 420 {
 421         std::string tmpfile_path = parent.session.session_directory().export_path();
 422         tmpfile_path = Glib::build_filename(tmpfile_path, "XXXXXX");
 423         std::vector<char> tmpfile_path_buf(tmpfile_path.size() + 1);
 424         std::copy(tmpfile_path.begin(), tmpfile_path.end(), tmpfile_path_buf.begin());
 425         tmpfile_path_buf[tmpfile_path.size()] = '\0';
 426
 427         config = new_config;
 428         uint32_t const channels = config.channel_config->get_n_chans();
 429         max_frames_out = 4086 - (4086 % channels); // TODO good chunk size
 430         use_loudness = config.format->normalize_loudness ();
 431         use_peak = config.format->normalize ();
 432
 433         buffer.reset (new AllocatingProcessContext<Sample> (max_frames_out, channels));
 434
 435         if (use_peak) {
 436                 peak_reader.reset (new PeakReader ());
 437         }
 438         if (use_loudness) {
 439                 loudness_reader.reset (new LoudnessReader (config.format->sample_rate(), channels, max_frames));
 440         }
 441
 442         normalizer.reset (new AudioGrapher::Normalizer (use_loudness ? 0.0 : config.format->normalize_dbfs()));
 443         threader.reset (new Threader<Sample> (parent.thread_pool));
 444         normalizer->alloc_buffer (max_frames_out);
 445         normalizer->add_output (threader);
 446
 447         int format = ExportFormatBase::F_RAW | ExportFormatBase::SF_Float;
 448
 449         if (parent._realtime) {
 450                 tmp_file.reset (new TmpFileRt<float> (&tmpfile_path_buf[0], format, channels, config.format->sample_rate()));
 451         } else {
 452                 tmp_file.reset (new TmpFileSync<float> (&tmpfile_path_buf[0], format, channels, config.format->sample_rate()));
 453         }
 454
 455         tmp_file->FileWritten.connect_same_thread (post_processing_connection,
 456                                                    boost::bind (&Intermediate::prepare_post_processing, this));
 457         tmp_file->FileFlushed.connect_same_thread (post_processing_connection,
 458                                                    boost::bind (&Intermediate::start_post_processing, this));
 459
 460         add_child (new_config);
 461
 462         if (use_loudness) {
 463                 loudness_reader->add_output (tmp_file);
 464         } else if (use_peak) {
 465                 peak_reader->add_output (tmp_file);
 466         }
 467 }
 468
 469 ExportGraphBuilder::FloatSinkPtr
 470 ExportGraphBuilder::Intermediate::sink ()
 471 {
 472         if (use_loudness) {
 473                 return loudness_reader;
 474         } else if (use_peak) {
 475                 return peak_reader;
 476         }
 477         return tmp_file;
 478 }
 479
 480 void
 481 ExportGraphBuilder::Intermediate::add_child (FileSpec const & new_config)
 482 {
 483         for (boost::ptr_list<SFC>::iterator it = children.begin(); it != children.end(); ++it) {
 484                 if (*it == new_config) {
 485                         it->add_child (new_config);
 486                         return;
 487                 }
 488         }
 489
 490         children.push_back (new SFC (parent, new_config, max_frames_out));
 491         threader->add_output (children.back().sink());
 492 }
 493
 494 void
 495 ExportGraphBuilder::Intermediate::remove_children (bool remove_out_files)
 496 {
 497         boost::ptr_list<SFC>::iterator iter = children.begin ();
 498
 499         while (iter != children.end() ) {
 500                 iter->remove_children (remove_out_files);
 501                 iter = children.erase (iter);
 502         }
 503 }
 504
 505 bool
 506 ExportGraphBuilder::Intermediate::operator== (FileSpec const & other_config) const
 507 {
 508         return config.format->normalize() == other_config.format->normalize() &&
 509                 config.format->normalize_loudness () == other_config.format->normalize_loudness() &&
 510                 (
 511                  (!config.format->normalize_loudness () && config.format->normalize_dbfs() == other_config.format->normalize_dbfs())
 512                  ||
 513                  // FIXME: allow simultaneous export of two formats with different loundness normalization settings
 514                  (config.format->normalize_loudness () /* lufs/dbtp is a result option, not an instantaion option */)
 515                 );
 516 }
 517
 518 unsigned
 519 ExportGraphBuilder::Intermediate::get_postprocessing_cycle_count() const
 520 {
 521         return static_cast<unsigned>(std::ceil(static_cast<float>(tmp_file->get_frames_written()) /
 522                                                max_frames_out));
 523 }
 524
 525 bool
 526 ExportGraphBuilder::Intermediate::process()
 527 {
 528         framecnt_t frames_read = tmp_file->read (*buffer);
 529         return frames_read != buffer->frames();
 530 }
 531
 532 void
 533 ExportGraphBuilder::Intermediate::prepare_post_processing()
 534 {
 535         // called in sync rt-context
 536         float gain;
 537         if (use_loudness) {
 538                 gain = normalizer->set_peak (loudness_reader->get_peak (config.format->normalize_lufs (), config.format->normalize_dbtp ()));
 539         } else if (use_peak) {
 540                 gain = normalizer->set_peak (peak_reader->get_peak());
 541         } else {
 542                 gain = normalizer->set_peak (0.0);
 543         }
 544         if (use_loudness || use_peak) {
 545                 // push info to analyzers
 546                 for (boost::ptr_list<SFC>::iterator i = children.begin(); i != children.end(); ++i) {
 547                         (*i).set_peak (gain);
 548                 }
 549         }
 550         tmp_file->add_output (normalizer);
 551         parent.intermediates.push_back (this);
 552 }
 553
 554 void
 555 ExportGraphBuilder::Intermediate::start_post_processing()
 556 {
 557         // called in disk-thread (when exporting in realtime)
 558         tmp_file->seek (0, SEEK_SET);
 559         if (!AudioEngine::instance()->freewheeling ()) {
 560                 AudioEngine::instance()->freewheel (true);
 561         }
 562 }
 563
 564 /* SRC */
 565
 566 ExportGraphBuilder::SRC::SRC (ExportGraphBuilder & parent, FileSpec const & new_config, framecnt_t max_frames)
 567         : parent (parent)
 568 {
 569         config = new_config;
 570         converter.reset (new SampleRateConverter (new_config.channel_config->get_n_chans()));
 571         ExportFormatSpecification & format = *new_config.format;
 572         converter->init (parent.session.nominal_frame_rate(), format.sample_rate(), format.src_quality());
 573         max_frames_out = converter->allocate_buffers (max_frames);
 574
 575         add_child (new_config);
 576 }
 577
 578 ExportGraphBuilder::FloatSinkPtr
 579 ExportGraphBuilder::SRC::sink ()
 580 {
 581         return converter;
 582 }
 583
 584 void
 585 ExportGraphBuilder::SRC::add_child (FileSpec const & new_config)
 586 {
 587         if (new_config.format->normalize() || parent._realtime) {
 588                 add_child_to_list (new_config, intermediate_children);
 589         } else {
 590                 add_child_to_list (new_config, children);
 591         }
 592 }
 593
 594 void
 595 ExportGraphBuilder::SRC::remove_children (bool remove_out_files)
 596 {
 597         boost::ptr_list<SFC>::iterator sfc_iter = children.begin();
 598
 599         while (sfc_iter != children.end() ) {
 600                 converter->remove_output (sfc_iter->sink() );
 601                 sfc_iter->remove_children (remove_out_files);
 602                 sfc_iter = children.erase (sfc_iter);
 603         }
 604
 605         boost::ptr_list<Intermediate>::iterator norm_iter = intermediate_children.begin();
 606
 607         while (norm_iter != intermediate_children.end() ) {
 608                 converter->remove_output (norm_iter->sink() );
 609                 norm_iter->remove_children (remove_out_files);
 610                 norm_iter = intermediate_children.erase (norm_iter);
 611         }
 612
 613 }
 614
 615 template<typename T>
 616 void
 617 ExportGraphBuilder::SRC::add_child_to_list (FileSpec const & new_config, boost::ptr_list<T> & list)
 618 {
 619         for (typename boost::ptr_list<T>::iterator it = list.begin(); it != list.end(); ++it) {
 620                 if (*it == new_config) {
 621                         it->add_child (new_config);
 622                         return;
 623                 }
 624         }
 625
 626         list.push_back (new T (parent, new_config, max_frames_out));
 627         converter->add_output (list.back().sink ());
 628 }
 629
 630 bool
 631 ExportGraphBuilder::SRC::operator== (FileSpec const & other_config) const
 632 {
 633         return config.format->sample_rate() == other_config.format->sample_rate();
 634 }
 635
 636 /* SilenceHandler */
 637 ExportGraphBuilder::SilenceHandler::SilenceHandler (ExportGraphBuilder & parent, FileSpec const & new_config, framecnt_t max_frames)
 638         : parent (parent)
 639 {
 640         config = new_config;
 641         max_frames_in = max_frames;
 642         framecnt_t sample_rate = parent.session.nominal_frame_rate();
 643
 644 #ifdef MIXBUS
 645         silence_trimmer.reset (new SilenceTrimmer<Sample>(max_frames_in, -90));
 646 #else
 647         // TODO silence-threshold should be per export-preset, with Config->get_silence_threshold being the default
 648         silence_trimmer.reset (new SilenceTrimmer<Sample>(max_frames_in, Config->get_export_silence_threshold ()));
 649 #endif
 650         silence_trimmer->set_trim_beginning (config.format->trim_beginning());
 651         silence_trimmer->set_trim_end (config.format->trim_end());
 652
 653         framecnt_t sb = config.format->silence_beginning_at (parent.timespan->get_start(), sample_rate);
 654         framecnt_t se = config.format->silence_end_at (parent.timespan->get_end(), sample_rate);
 655
 656         silence_trimmer->add_silence_to_beginning (sb);
 657         silence_trimmer->add_silence_to_end (se);
 658
 659         add_child (new_config);
 660 }
 661
 662 ExportGraphBuilder::FloatSinkPtr
 663 ExportGraphBuilder::SilenceHandler::sink ()
 664 {
 665         return silence_trimmer;
 666 }
 667
 668 void
 669 ExportGraphBuilder::SilenceHandler::add_child (FileSpec const & new_config)
 670 {
 671         for (boost::ptr_list<SRC>::iterator it = children.begin(); it != children.end(); ++it) {
 672                 if (*it == new_config) {
 673                         it->add_child (new_config);
 674                         return;
 675                 }
 676         }
 677
 678         children.push_back (new SRC (parent, new_config, max_frames_in));
 679         silence_trimmer->add_output (children.back().sink());
 680 }
 681
 682 void
 683 ExportGraphBuilder::SilenceHandler::remove_children (bool remove_out_files)
 684 {
 685         boost::ptr_list<SRC>::iterator iter = children.begin();
 686
 687         while (iter != children.end() ) {
 688                 silence_trimmer->remove_output (iter->sink() );
 689                 iter->remove_children (remove_out_files);
 690                 iter = children.erase (iter);
 691         }
 692 }
 693
 694 bool
 695 ExportGraphBuilder::SilenceHandler::operator== (FileSpec const & other_config) const
 696 {
 697         ExportFormatSpecification & format = *config.format;
 698         ExportFormatSpecification & other_format = *other_config.format;
 699         return (format.trim_beginning() == other_format.trim_beginning()) &&
 700                 (format.trim_end() == other_format.trim_end()) &&
 701                 (format.silence_beginning_time() == other_format.silence_beginning_time()) &&
 702                 (format.silence_end_time() == other_format.silence_end_time());
 703 }
 704
 705 /* ChannelConfig */
 706
 707 ExportGraphBuilder::ChannelConfig::ChannelConfig (ExportGraphBuilder & parent, FileSpec const & new_config, ChannelMap & channel_map)
 708         : parent (parent)
 709 {
 710         typedef ExportChannelConfiguration::ChannelList ChannelList;
 711
 712         config = new_config;
 713
 714         framecnt_t max_frames = parent.session.engine().samples_per_cycle();
 715         interleaver.reset (new Interleaver<Sample> ());
 716         interleaver->init (new_config.channel_config->get_n_chans(), max_frames);
 717
 718         // Make the chunk size divisible by the channel count
 719         int chan_count = new_config.channel_config->get_n_chans();
 720         max_frames_out = 8192;
 721         if (chan_count > 0) {
 722                 max_frames_out -= max_frames_out % chan_count;
 723         }
 724         chunker.reset (new Chunker<Sample> (max_frames_out));
 725         interleaver->add_output(chunker);
 726
 727         ChannelList const & channel_list = config.channel_config->get_channels();
 728         unsigned chan = 0;
 729         for (ChannelList::const_iterator it = channel_list.begin(); it != channel_list.end(); ++it, ++chan) {
 730                 ChannelMap::iterator map_it = channel_map.find (*it);
 731                 if (map_it == channel_map.end()) {
 732                         std::pair<ChannelMap::iterator, bool> result_pair =
 733                                 channel_map.insert (std::make_pair (*it, IdentityVertexPtr (new IdentityVertex<Sample> ())));
 734                         assert (result_pair.second);
 735                         map_it = result_pair.first;
 736                 }
 737                 map_it->second->add_output (interleaver->input (chan));
 738         }
 739
 740         add_child (new_config);
 741 }
 742
 743 void
 744 ExportGraphBuilder::ChannelConfig::add_child (FileSpec const & new_config)
 745 {
 746         assert (*this == new_config);
 747
 748         for (boost::ptr_list<SilenceHandler>::iterator it = children.begin(); it != children.end(); ++it) {
 749                 if (*it == new_config) {
 750                         it->add_child (new_config);
 751                         return;
 752                 }
 753         }
 754
 755         children.push_back (new SilenceHandler (parent, new_config, max_frames_out));
 756         chunker->add_output (children.back().sink ());
 757 }
 758
 759 void
 760 ExportGraphBuilder::ChannelConfig::remove_children (bool remove_out_files)
 761 {
 762         boost::ptr_list<SilenceHandler>::iterator iter = children.begin();
 763
 764         while(iter != children.end() ) {
 765
 766                 chunker->remove_output (iter->sink ());
 767                 iter->remove_children (remove_out_files);
 768                 iter = children.erase(iter);
 769         }
 770 }
 771
 772 bool
 773 ExportGraphBuilder::ChannelConfig::operator== (FileSpec const & other_config) const
 774 {
 775         return config.channel_config == other_config.channel_config;
 776 }
 777
 778 } // namespace ARDOUR