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