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/cmdpipe_writer.h"
  30 #include "audiographer/general/interleaver.h"
  31 #include "audiographer/general/normalizer.h"
  32 #include "audiographer/general/analyser.h"
  33 #include "audiographer/general/peak_reader.h"
  34 #include "audiographer/general/loudness_reader.h"
  35 #include "audiographer/general/sample_format_converter.h"
  36 #include "audiographer/general/sr_converter.h"
  37 #include "audiographer/general/silence_trimmer.h"
  38 #include "audiographer/general/threader.h"
  39 #include "audiographer/sndfile/tmp_file.h"
  40 #include "audiographer/sndfile/tmp_file_rt.h"
  41 #include "audiographer/sndfile/tmp_file_sync.h"
  42 #include "audiographer/sndfile/sndfile_writer.h"
  43
  44 #include "ardour/audioengine.h"
  45 #include "ardour/export_channel_configuration.h"
  46 #include "ardour/export_failed.h"
  47 #include "ardour/export_filename.h"
  48 #include "ardour/export_format_specification.h"
  49 #include "ardour/export_timespan.h"
  50 #include "ardour/filesystem_paths.h"
  51 #include "ardour/session_directory.h"
  52 #include "ardour/session_metadata.h"
  53 #include "ardour/sndfile_helpers.h"
  54 #include "ardour/system_exec.h"
  55
  56 #include "pbd/file_utils.h"
  57 #include "pbd/cpus.h"
  58
  59 using namespace AudioGrapher;
  60 using std::string;
  61
  62 namespace ARDOUR {
  63
  64 ExportGraphBuilder::ExportGraphBuilder (Session const & session)
  65         : session (session)
  66         , thread_pool (hardware_concurrency())
  67 {
  68         process_buffer_samples = session.engine().samples_per_cycle();
  69 }
  70
  71 ExportGraphBuilder::~ExportGraphBuilder ()
  72 {
  73 }
  74
  75 int
  76 ExportGraphBuilder::process (samplecnt_t samples, bool last_cycle)
  77 {
  78         assert(samples <= process_buffer_samples);
  79
  80         for (ChannelMap::iterator it = channels.begin(); it != channels.end(); ++it) {
  81                 Sample const * process_buffer = 0;
  82                 it->first->read (process_buffer, samples);
  83                 ConstProcessContext<Sample> context(process_buffer, samples, 1);
  84                 if (last_cycle) { context().set_flag (ProcessContext<Sample>::EndOfInput); }
  85                 it->second->process (context);
  86         }
  87
  88         return 0;
  89 }
  90
  91 bool
  92 ExportGraphBuilder::post_process ()
  93 {
  94         for (std::list<Intermediate *>::iterator it = intermediates.begin(); it != intermediates.end(); /* ++ in loop */) {
  95                 if ((*it)->process()) {
  96                         it = intermediates.erase (it);
  97                 } else {
  98                         ++it;
  99                 }
 100         }
 101
 102         return intermediates.empty();
 103 }
 104
 105 unsigned
 106 ExportGraphBuilder::get_postprocessing_cycle_count() const
 107 {
 108         unsigned max = 0;
 109         for (std::list<Intermediate *>::const_iterator it = intermediates.begin(); it != intermediates.end(); ++it) {
 110                 max = std::max(max, (*it)->get_postprocessing_cycle_count());
 111         }
 112         return max;
 113 }
 114
 115 void
 116 ExportGraphBuilder::reset ()
 117 {
 118         timespan.reset();
 119         channel_configs.clear ();
 120         channels.clear ();
 121         intermediates.clear ();
 122         analysis_map.clear();
 123         _realtime = false;
 124 }
 125
 126 void
 127 ExportGraphBuilder::cleanup (bool remove_out_files/*=false*/)
 128 {
 129         ChannelConfigList::iterator iter = channel_configs.begin();
 130
 131         while (iter != channel_configs.end() ) {
 132                 iter->remove_children(remove_out_files);
 133                 iter = channel_configs.erase(iter);
 134         }
 135 }
 136
 137 void
 138 ExportGraphBuilder::set_current_timespan (boost::shared_ptr<ExportTimespan> span)
 139 {
 140         timespan = span;
 141 }
 142
 143 void
 144 ExportGraphBuilder::add_config (FileSpec const & config, bool rt)
 145 {
 146         ExportChannelConfiguration::ChannelList const & channels =
 147                 config.channel_config->get_channels();
 148         for(ExportChannelConfiguration::ChannelList::const_iterator it = channels.begin();
 149             it != channels.end(); ++it) {
 150                 (*it)->set_max_buffer_size(process_buffer_samples);
 151         }
 152
 153         _realtime = rt;
 154
 155         // If the sample rate is "session rate", change it to the real value.
 156         // However, we need to copy it to not change the config which is saved...
 157         FileSpec new_config (config);
 158         new_config.format.reset(new ExportFormatSpecification(*new_config.format, false));
 159         if(new_config.format->sample_rate() == ExportFormatBase::SR_Session) {
 160                 samplecnt_t session_rate = session.nominal_sample_rate();
 161                 new_config.format->set_sample_rate(ExportFormatBase::nearest_sample_rate(session_rate));
 162         }
 163
 164
 165         if (!new_config.channel_config->get_split ()) {
 166                 add_split_config (new_config);
 167                 return;
 168         }
 169
 170         // Split channel configurations are split into several channel configurations,
 171         // each corresponding to a file, at this stage
 172         typedef std::list<boost::shared_ptr<ExportChannelConfiguration> > ConfigList;
 173         ConfigList file_configs;
 174         new_config.channel_config->configurations_for_files (file_configs);
 175
 176         unsigned chan = 1;
 177         for (ConfigList::iterator it = file_configs.begin(); it != file_configs.end(); ++it, ++chan) {
 178                 FileSpec copy = new_config;
 179                 copy.channel_config = *it;
 180
 181                 copy.filename.reset (new ExportFilename (*copy.filename));
 182                 copy.filename->include_channel = true;
 183                 copy.filename->set_channel (chan);
 184
 185                 add_split_config (copy);
 186         }
 187 }
 188
 189 void
 190 ExportGraphBuilder::get_analysis_results (AnalysisResults& results) {
 191         for (AnalysisMap::iterator i = analysis_map.begin(); i != analysis_map.end(); ++i) {
 192                 ExportAnalysisPtr p = i->second->result ();
 193                 if (p) {
 194                         results.insert (std::make_pair (i->first, p));
 195                 }
 196         }
 197 }
 198
 199 void
 200 ExportGraphBuilder::add_split_config (FileSpec const & config)
 201 {
 202         for (ChannelConfigList::iterator it = channel_configs.begin(); it != channel_configs.end(); ++it) {
 203                 if (*it == config) {
 204                         it->add_child (config);
 205                         return;
 206                 }
 207         }
 208
 209         // No duplicate channel config found, create new one
 210         channel_configs.push_back (new ChannelConfig (*this, config, channels));
 211 }
 212
 213 /* Encoder */
 214
 215 template <>
 216 boost::shared_ptr<AudioGrapher::Sink<Sample> >
 217 ExportGraphBuilder::Encoder::init (FileSpec const & new_config)
 218 {
 219         config = new_config;
 220         if (config.format->format_id() == ExportFormatBase::F_FFMPEG) {
 221                 init_writer (pipe_writer);
 222                 return pipe_writer;
 223         } else {
 224                 init_writer (float_writer);
 225                 return float_writer;
 226         }
 227 }
 228
 229 template <>
 230 boost::shared_ptr<AudioGrapher::Sink<int> >
 231 ExportGraphBuilder::Encoder::init (FileSpec const & new_config)
 232 {
 233         config = new_config;
 234         init_writer (int_writer);
 235         return int_writer;
 236 }
 237
 238 template <>
 239 boost::shared_ptr<AudioGrapher::Sink<short> >
 240 ExportGraphBuilder::Encoder::init (FileSpec const & new_config)
 241 {
 242         config = new_config;
 243         init_writer (short_writer);
 244         return short_writer;
 245 }
 246
 247 void
 248 ExportGraphBuilder::Encoder::add_child (FileSpec const & new_config)
 249 {
 250         filenames.push_back (new_config.filename);
 251 }
 252
 253 void
 254 ExportGraphBuilder::Encoder::destroy_writer (bool delete_out_file)
 255 {
 256         if (delete_out_file ) {
 257
 258                 if (float_writer) {
 259                         float_writer->close ();
 260                 }
 261
 262                 if (int_writer) {
 263                         int_writer->close ();
 264                 }
 265
 266                 if (short_writer) {
 267                         short_writer->close ();
 268                 }
 269
 270                 if (pipe_writer) {
 271                         pipe_writer->close ();
 272                 }
 273
 274                 if (std::remove(writer_filename.c_str() ) != 0) {
 275                         std::cout << "Encoder::destroy_writer () : Error removing file: " << strerror(errno) << std::endl;
 276                 }
 277         }
 278
 279         float_writer.reset ();
 280         int_writer.reset ();
 281         short_writer.reset ();
 282         pipe_writer.reset ();
 283 }
 284
 285 bool
 286 ExportGraphBuilder::Encoder::operator== (FileSpec const & other_config) const
 287 {
 288         return get_real_format (config) == get_real_format (other_config);
 289 }
 290
 291 int
 292 ExportGraphBuilder::Encoder::get_real_format (FileSpec const & config)
 293 {
 294         ExportFormatSpecification & format = *config.format;
 295         return format.format_id() | format.sample_format() | format.endianness();
 296 }
 297
 298 template<typename T>
 299 void
 300 ExportGraphBuilder::Encoder::init_writer (boost::shared_ptr<AudioGrapher::SndfileWriter<T> > & writer)
 301 {
 302         unsigned channels = config.channel_config->get_n_chans();
 303         int format = get_real_format (config);
 304         config.filename->set_channel_config(config.channel_config);
 305         writer_filename = config.filename->get_path (config.format);
 306
 307         writer.reset (new AudioGrapher::SndfileWriter<T> (writer_filename, format, channels, config.format->sample_rate(), config.broadcast_info));
 308         writer->FileWritten.connect_same_thread (copy_files_connection, boost::bind (&ExportGraphBuilder::Encoder::copy_files, this, _1));
 309         if (format & ExportFormatBase::SF_Vorbis) {
 310                 /* libsndfile uses range 0..1 (worst.. best) for
 311                  * SFC_SET_VBR_ENCODING_QUALITY and maps
 312                  * SFC_SET_COMPRESSION_LEVEL = 1.0 - VBR_ENCODING_QUALITY
 313                  */
 314                 double vorbis_quality = config.format->codec_quality () / 100.f;
 315                 if (vorbis_quality >= 0 && vorbis_quality <= 1.0) {
 316                         writer->command (SFC_SET_VBR_ENCODING_QUALITY, &vorbis_quality, sizeof (double));
 317                 }
 318         }
 319 }
 320
 321 template<typename T>
 322 void
 323 ExportGraphBuilder::Encoder::init_writer (boost::shared_ptr<AudioGrapher::CmdPipeWriter<T> > & writer)
 324 {
 325         unsigned channels = config.channel_config->get_n_chans();
 326         config.filename->set_channel_config(config.channel_config);
 327         writer_filename = config.filename->get_path (config.format);
 328
 329         std::string ffmpeg_exe;
 330         std::string unused;
 331
 332         if (!ArdourVideoToolPaths::transcoder_exe (ffmpeg_exe, unused)) {
 333                 throw ExportFailed ("External encoder (ffmpeg) is not available.");
 334         }
 335
 336         int quality = config.format->codec_quality ();
 337
 338         int a=0;
 339         char **argp = (char**) calloc (100, sizeof(char*));
 340         char tmp[64];
 341         argp[a++] = strdup(ffmpeg_exe.c_str());
 342         argp[a++] = strdup ("-f");
 343         argp[a++] = strdup ("f32le");
 344         argp[a++] = strdup ("-acodec");
 345         argp[a++] = strdup ("pcm_f32le");
 346         argp[a++] = strdup ("-ac");
 347         snprintf (tmp, sizeof(tmp), "%d", channels);
 348         argp[a++] = strdup (tmp);
 349         argp[a++] = strdup ("-ar");
 350         snprintf (tmp, sizeof(tmp), "%d", config.format->sample_rate());
 351         argp[a++] = strdup (tmp);
 352         argp[a++] = strdup ("-i");
 353         argp[a++] = strdup ("pipe:0");
 354
 355         argp[a++] = strdup ("-y");
 356         if (quality <= 0) {
 357                 /* variable rate, lower is better */
 358                 snprintf (tmp, sizeof(tmp), "%d", -quality);
 359                 argp[a++] = strdup ("-q:a"); argp[a++] = strdup (tmp);
 360         } else {
 361                 /* fixed bitrate, higher is better */
 362                 snprintf (tmp, sizeof(tmp), "%dk", quality); // eg. "192k"
 363                 argp[a++] = strdup ("-b:a"); argp[a++] = strdup (tmp);
 364         }
 365
 366         if (1) {
 367                 SessionMetadata::MetaDataMap meta;
 368                 meta["comment"] = "Created with " PROGRAM_NAME;
 369                 ARDOUR::SessionMetadata* session_data = ARDOUR::SessionMetadata::Metadata();
 370                 session_data->av_export_tag (meta);
 371
 372                 for(SessionMetadata::MetaDataMap::const_iterator it = meta.begin(); it != meta.end(); ++it) {
 373                         argp[a++] = strdup("-metadata");
 374                         argp[a++] = SystemExec::format_key_value_parameter (it->first.c_str(), it->second.c_str());
 375                 }
 376         }
 377
 378         argp[a++] = strdup (writer_filename.c_str());
 379         argp[a] = (char *)0;
 380
 381         /* argp is free()d in ~SystemExec,
 382          * SystemExec is deleted when writer is destroyed */
 383         ARDOUR::SystemExec* exec = new ARDOUR::SystemExec (ffmpeg_exe, argp);
 384         if (exec->start(0)) {
 385                 throw ExportFailed ("External encoder (ffmpeg) cannot be started.");
 386         }
 387         writer.reset (new AudioGrapher::CmdPipeWriter<T> (exec, writer_filename));
 388         writer->FileWritten.connect_same_thread (copy_files_connection, boost::bind (&ExportGraphBuilder::Encoder::copy_files, this, _1));
 389 }
 390
 391 void
 392 ExportGraphBuilder::Encoder::copy_files (std::string orig_path)
 393 {
 394         while (filenames.size()) {
 395                 ExportFilenamePtr & filename = filenames.front();
 396                 PBD::copy_file (orig_path, filename->get_path (config.format).c_str());
 397                 filenames.pop_front();
 398         }
 399 }
 400
 401 /* SFC */
 402
 403 ExportGraphBuilder::SFC::SFC (ExportGraphBuilder &parent, FileSpec const & new_config, samplecnt_t max_samples)
 404         : data_width(0)
 405 {
 406         config = new_config;
 407         data_width = sndfile_data_width (Encoder::get_real_format (config));
 408         unsigned channels = new_config.channel_config->get_n_chans();
 409         _analyse = config.format->analyse();
 410         if (_analyse) {
 411                 samplecnt_t sample_rate = parent.session.nominal_sample_rate();
 412                 samplecnt_t sb = config.format->silence_beginning_at (parent.timespan->get_start(), sample_rate);
 413                 samplecnt_t se = config.format->silence_end_at (parent.timespan->get_end(), sample_rate);
 414                 samplecnt_t duration = parent.timespan->get_length () + sb + se;
 415                 max_samples = min ((samplecnt_t) 8192 * channels, max ((samplecnt_t) 4096 * channels, max_samples));
 416                 chunker.reset (new Chunker<Sample> (max_samples));
 417                 analyser.reset (new Analyser (config.format->sample_rate(), channels, max_samples,
 418                                         (samplecnt_t) ceil (duration * config.format->sample_rate () / (double) sample_rate)));
 419                 chunker->add_output (analyser);
 420
 421                 config.filename->set_channel_config (config.channel_config);
 422                 parent.add_analyser (config.filename->get_path (config.format), analyser);
 423         }
 424
 425         if (data_width == 8 || data_width == 16) {
 426                 short_converter = ShortConverterPtr (new SampleFormatConverter<short> (channels));
 427                 short_converter->init (max_samples, config.format->dither_type(), data_width);
 428                 add_child (config);
 429                 if (_analyse) { analyser->add_output (short_converter); }
 430
 431         } else if (data_width == 24 || data_width == 32) {
 432                 int_converter = IntConverterPtr (new SampleFormatConverter<int> (channels));
 433                 int_converter->init (max_samples, config.format->dither_type(), data_width);
 434                 add_child (config);
 435                 if (_analyse) { analyser->add_output (int_converter); }
 436         } else {
 437                 int actual_data_width = 8 * sizeof(Sample);
 438                 float_converter = FloatConverterPtr (new SampleFormatConverter<Sample> (channels));
 439                 float_converter->init (max_samples, config.format->dither_type(), actual_data_width);
 440                 add_child (config);
 441                 if (_analyse) { analyser->add_output (float_converter); }
 442         }
 443 }
 444
 445 void
 446 ExportGraphBuilder::SFC::set_peak (float gain)
 447 {
 448         if (_analyse) {
 449                 analyser->set_normalization_gain (gain);
 450         }
 451 }
 452
 453 ExportGraphBuilder::FloatSinkPtr
 454 ExportGraphBuilder::SFC::sink ()
 455 {
 456         if (_analyse) {
 457                 return chunker;
 458         } else if (data_width == 8 || data_width == 16) {
 459                 return short_converter;
 460         } else if (data_width == 24 || data_width == 32) {
 461                 return int_converter;
 462         } else {
 463                 return float_converter;
 464         }
 465 }
 466
 467 void
 468 ExportGraphBuilder::SFC::add_child (FileSpec const & new_config)
 469 {
 470         for (boost::ptr_list<Encoder>::iterator it = children.begin(); it != children.end(); ++it) {
 471                 if (*it == new_config) {
 472                         it->add_child (new_config);
 473                         return;
 474                 }
 475         }
 476
 477         children.push_back (new Encoder());
 478         Encoder & encoder = children.back();
 479
 480         if (data_width == 8 || data_width == 16) {
 481                 short_converter->add_output (encoder.init<short> (new_config));
 482         } else if (data_width == 24 || data_width == 32) {
 483                 int_converter->add_output (encoder.init<int> (new_config));
 484         } else {
 485                 float_converter->add_output (encoder.init<Sample> (new_config));
 486         }
 487 }
 488
 489 void
 490 ExportGraphBuilder::SFC::remove_children (bool remove_out_files)
 491 {
 492         boost::ptr_list<Encoder>::iterator iter = children.begin ();
 493
 494         while (iter != children.end() ) {
 495
 496                 if (remove_out_files) {
 497                         iter->destroy_writer(remove_out_files);
 498                 }
 499                 iter = children.erase (iter);
 500         }
 501 }
 502
 503 bool
 504 ExportGraphBuilder::SFC::operator== (FileSpec const & other_config) const
 505 {
 506         return config.format->sample_format() == other_config.format->sample_format();
 507 }
 508
 509 /* Intermediate (Normalizer, TmpFile) */
 510
 511 ExportGraphBuilder::Intermediate::Intermediate (ExportGraphBuilder & parent, FileSpec const & new_config, samplecnt_t max_samples)
 512         : parent (parent)
 513         , use_loudness (false)
 514         , use_peak (false)
 515 {
 516         std::string tmpfile_path = parent.session.session_directory().export_path();
 517         tmpfile_path = Glib::build_filename(tmpfile_path, "XXXXXX");
 518         std::vector<char> tmpfile_path_buf(tmpfile_path.size() + 1);
 519         std::copy(tmpfile_path.begin(), tmpfile_path.end(), tmpfile_path_buf.begin());
 520         tmpfile_path_buf[tmpfile_path.size()] = '\0';
 521
 522         config = new_config;
 523         uint32_t const channels = config.channel_config->get_n_chans();
 524         max_samples_out = 4086 - (4086 % channels); // TODO good chunk size
 525         use_loudness = config.format->normalize_loudness ();
 526         use_peak = config.format->normalize ();
 527
 528         buffer.reset (new AllocatingProcessContext<Sample> (max_samples_out, channels));
 529
 530         if (use_peak) {
 531                 peak_reader.reset (new PeakReader ());
 532         }
 533         if (use_loudness) {
 534                 loudness_reader.reset (new LoudnessReader (config.format->sample_rate(), channels, max_samples));
 535         }
 536
 537         normalizer.reset (new AudioGrapher::Normalizer (use_loudness ? 0.0 : config.format->normalize_dbfs()));
 538         threader.reset (new Threader<Sample> (parent.thread_pool));
 539         normalizer->alloc_buffer (max_samples_out);
 540         normalizer->add_output (threader);
 541
 542         int format = ExportFormatBase::F_RAW | ExportFormatBase::SF_Float;
 543
 544         if (parent._realtime) {
 545                 tmp_file.reset (new TmpFileRt<float> (&tmpfile_path_buf[0], format, channels, config.format->sample_rate()));
 546         } else {
 547                 tmp_file.reset (new TmpFileSync<float> (&tmpfile_path_buf[0], format, channels, config.format->sample_rate()));
 548         }
 549
 550         tmp_file->FileWritten.connect_same_thread (post_processing_connection,
 551                                                    boost::bind (&Intermediate::prepare_post_processing, this));
 552         tmp_file->FileFlushed.connect_same_thread (post_processing_connection,
 553                                                    boost::bind (&Intermediate::start_post_processing, this));
 554
 555         add_child (new_config);
 556
 557         if (use_loudness) {
 558                 loudness_reader->add_output (tmp_file);
 559         } else if (use_peak) {
 560                 peak_reader->add_output (tmp_file);
 561         }
 562 }
 563
 564 ExportGraphBuilder::FloatSinkPtr
 565 ExportGraphBuilder::Intermediate::sink ()
 566 {
 567         if (use_loudness) {
 568                 return loudness_reader;
 569         } else if (use_peak) {
 570                 return peak_reader;
 571         }
 572         return tmp_file;
 573 }
 574
 575 void
 576 ExportGraphBuilder::Intermediate::add_child (FileSpec const & new_config)
 577 {
 578         for (boost::ptr_list<SFC>::iterator it = children.begin(); it != children.end(); ++it) {
 579                 if (*it == new_config) {
 580                         it->add_child (new_config);
 581                         return;
 582                 }
 583         }
 584
 585         children.push_back (new SFC (parent, new_config, max_samples_out));
 586         threader->add_output (children.back().sink());
 587 }
 588
 589 void
 590 ExportGraphBuilder::Intermediate::remove_children (bool remove_out_files)
 591 {
 592         boost::ptr_list<SFC>::iterator iter = children.begin ();
 593
 594         while (iter != children.end() ) {
 595                 iter->remove_children (remove_out_files);
 596                 iter = children.erase (iter);
 597         }
 598 }
 599
 600 bool
 601 ExportGraphBuilder::Intermediate::operator== (FileSpec const & other_config) const
 602 {
 603         return config.format->normalize() == other_config.format->normalize() &&
 604                 config.format->normalize_loudness () == other_config.format->normalize_loudness() &&
 605                 (
 606                  (!config.format->normalize_loudness () && config.format->normalize_dbfs() == other_config.format->normalize_dbfs())
 607                  ||
 608                  // FIXME: allow simultaneous export of two formats with different loundness normalization settings
 609                  (config.format->normalize_loudness () /* lufs/dbtp is a result option, not an instantaion option */)
 610                 );
 611 }
 612
 613 unsigned
 614 ExportGraphBuilder::Intermediate::get_postprocessing_cycle_count() const
 615 {
 616         return static_cast<unsigned>(std::ceil(static_cast<float>(tmp_file->get_samples_written()) /
 617                                                max_samples_out));
 618 }
 619
 620 bool
 621 ExportGraphBuilder::Intermediate::process()
 622 {
 623         samplecnt_t samples_read = tmp_file->read (*buffer);
 624         return samples_read != buffer->samples();
 625 }
 626
 627 void
 628 ExportGraphBuilder::Intermediate::prepare_post_processing()
 629 {
 630         // called in sync rt-context
 631         float gain;
 632         if (use_loudness) {
 633                 gain = normalizer->set_peak (loudness_reader->get_peak (config.format->normalize_lufs (), config.format->normalize_dbtp ()));
 634         } else if (use_peak) {
 635                 gain = normalizer->set_peak (peak_reader->get_peak());
 636         } else {
 637                 gain = normalizer->set_peak (0.0);
 638         }
 639         if (use_loudness || use_peak) {
 640                 // push info to analyzers
 641                 for (boost::ptr_list<SFC>::iterator i = children.begin(); i != children.end(); ++i) {
 642                         (*i).set_peak (gain);
 643                 }
 644         }
 645         tmp_file->add_output (normalizer);
 646         parent.intermediates.push_back (this);
 647 }
 648
 649 void
 650 ExportGraphBuilder::Intermediate::start_post_processing()
 651 {
 652         // called in disk-thread (when exporting in realtime)
 653         tmp_file->seek (0, SEEK_SET);
 654         if (!AudioEngine::instance()->freewheeling ()) {
 655                 AudioEngine::instance()->freewheel (true);
 656         }
 657 }
 658
 659 /* SRC */
 660
 661 ExportGraphBuilder::SRC::SRC (ExportGraphBuilder & parent, FileSpec const & new_config, samplecnt_t max_samples)
 662         : parent (parent)
 663 {
 664         config = new_config;
 665         converter.reset (new SampleRateConverter (new_config.channel_config->get_n_chans()));
 666         ExportFormatSpecification & format = *new_config.format;
 667         converter->init (parent.session.nominal_sample_rate(), format.sample_rate(), format.src_quality());
 668         max_samples_out = converter->allocate_buffers (max_samples);
 669
 670         add_child (new_config);
 671 }
 672
 673 ExportGraphBuilder::FloatSinkPtr
 674 ExportGraphBuilder::SRC::sink ()
 675 {
 676         return converter;
 677 }
 678
 679 void
 680 ExportGraphBuilder::SRC::add_child (FileSpec const & new_config)
 681 {
 682         if (new_config.format->normalize() || parent._realtime) {
 683                 add_child_to_list (new_config, intermediate_children);
 684         } else {
 685                 add_child_to_list (new_config, children);
 686         }
 687 }
 688
 689 void
 690 ExportGraphBuilder::SRC::remove_children (bool remove_out_files)
 691 {
 692         boost::ptr_list<SFC>::iterator sfc_iter = children.begin();
 693
 694         while (sfc_iter != children.end() ) {
 695                 converter->remove_output (sfc_iter->sink() );
 696                 sfc_iter->remove_children (remove_out_files);
 697                 sfc_iter = children.erase (sfc_iter);
 698         }
 699
 700         boost::ptr_list<Intermediate>::iterator norm_iter = intermediate_children.begin();
 701
 702         while (norm_iter != intermediate_children.end() ) {
 703                 converter->remove_output (norm_iter->sink() );
 704                 norm_iter->remove_children (remove_out_files);
 705                 norm_iter = intermediate_children.erase (norm_iter);
 706         }
 707
 708 }
 709
 710 template<typename T>
 711 void
 712 ExportGraphBuilder::SRC::add_child_to_list (FileSpec const & new_config, boost::ptr_list<T> & list)
 713 {
 714         for (typename boost::ptr_list<T>::iterator it = list.begin(); it != list.end(); ++it) {
 715                 if (*it == new_config) {
 716                         it->add_child (new_config);
 717                         return;
 718                 }
 719         }
 720
 721         list.push_back (new T (parent, new_config, max_samples_out));
 722         converter->add_output (list.back().sink ());
 723 }
 724
 725 bool
 726 ExportGraphBuilder::SRC::operator== (FileSpec const & other_config) const
 727 {
 728         return config.format->sample_rate() == other_config.format->sample_rate();
 729 }
 730
 731 /* SilenceHandler */
 732 ExportGraphBuilder::SilenceHandler::SilenceHandler (ExportGraphBuilder & parent, FileSpec const & new_config, samplecnt_t max_samples)
 733         : parent (parent)
 734 {
 735         config = new_config;
 736         max_samples_in = max_samples;
 737         samplecnt_t sample_rate = parent.session.nominal_sample_rate();
 738
 739         /* work around partsing "-inf" config to "0" -- 7b1f97b
 740          * silence trim 0dBFS makes no sense, anyway.
 741          */
 742         float est = Config->get_export_silence_threshold ();
 743         if (est >= 0.f) est = -INFINITY;
 744 #ifdef MIXBUS
 745         // Mixbus channelstrip always dithers the signal, cut above dither level
 746         silence_trimmer.reset (new SilenceTrimmer<Sample>(max_samples_in, std::max (-90.f, est)));
 747 #else
 748         // TODO silence-threshold should be per export-preset, with Config->get_silence_threshold being the default
 749         silence_trimmer.reset (new SilenceTrimmer<Sample>(max_samples_in, est));
 750 #endif
 751         silence_trimmer->set_trim_beginning (config.format->trim_beginning());
 752         silence_trimmer->set_trim_end (config.format->trim_end());
 753
 754         samplecnt_t sb = config.format->silence_beginning_at (parent.timespan->get_start(), sample_rate);
 755         samplecnt_t se = config.format->silence_end_at (parent.timespan->get_end(), sample_rate);
 756
 757         silence_trimmer->add_silence_to_beginning (sb);
 758         silence_trimmer->add_silence_to_end (se);
 759
 760         add_child (new_config);
 761 }
 762
 763 ExportGraphBuilder::FloatSinkPtr
 764 ExportGraphBuilder::SilenceHandler::sink ()
 765 {
 766         return silence_trimmer;
 767 }
 768
 769 void
 770 ExportGraphBuilder::SilenceHandler::add_child (FileSpec const & new_config)
 771 {
 772         for (boost::ptr_list<SRC>::iterator it = children.begin(); it != children.end(); ++it) {
 773                 if (*it == new_config) {
 774                         it->add_child (new_config);
 775                         return;
 776                 }
 777         }
 778
 779         children.push_back (new SRC (parent, new_config, max_samples_in));
 780         silence_trimmer->add_output (children.back().sink());
 781 }
 782
 783 void
 784 ExportGraphBuilder::SilenceHandler::remove_children (bool remove_out_files)
 785 {
 786         boost::ptr_list<SRC>::iterator iter = children.begin();
 787
 788         while (iter != children.end() ) {
 789                 silence_trimmer->remove_output (iter->sink() );
 790                 iter->remove_children (remove_out_files);
 791                 iter = children.erase (iter);
 792         }
 793 }
 794
 795 bool
 796 ExportGraphBuilder::SilenceHandler::operator== (FileSpec const & other_config) const
 797 {
 798         ExportFormatSpecification & format = *config.format;
 799         ExportFormatSpecification & other_format = *other_config.format;
 800         return (format.trim_beginning() == other_format.trim_beginning()) &&
 801                 (format.trim_end() == other_format.trim_end()) &&
 802                 (format.silence_beginning_time() == other_format.silence_beginning_time()) &&
 803                 (format.silence_end_time() == other_format.silence_end_time());
 804 }
 805
 806 /* ChannelConfig */
 807
 808 ExportGraphBuilder::ChannelConfig::ChannelConfig (ExportGraphBuilder & parent, FileSpec const & new_config, ChannelMap & channel_map)
 809         : parent (parent)
 810 {
 811         typedef ExportChannelConfiguration::ChannelList ChannelList;
 812
 813         config = new_config;
 814
 815         samplecnt_t max_samples = parent.session.engine().samples_per_cycle();
 816         interleaver.reset (new Interleaver<Sample> ());
 817         interleaver->init (new_config.channel_config->get_n_chans(), max_samples);
 818
 819         // Make the chunk size divisible by the channel count
 820         int chan_count = new_config.channel_config->get_n_chans();
 821         max_samples_out = 8192;
 822         if (chan_count > 0) {
 823                 max_samples_out -= max_samples_out % chan_count;
 824         }
 825         chunker.reset (new Chunker<Sample> (max_samples_out));
 826         interleaver->add_output(chunker);
 827
 828         ChannelList const & channel_list = config.channel_config->get_channels();
 829         unsigned chan = 0;
 830         for (ChannelList::const_iterator it = channel_list.begin(); it != channel_list.end(); ++it, ++chan) {
 831                 ChannelMap::iterator map_it = channel_map.find (*it);
 832                 if (map_it == channel_map.end()) {
 833                         std::pair<ChannelMap::iterator, bool> result_pair =
 834                                 channel_map.insert (std::make_pair (*it, IdentityVertexPtr (new IdentityVertex<Sample> ())));
 835                         assert (result_pair.second);
 836                         map_it = result_pair.first;
 837                 }
 838                 map_it->second->add_output (interleaver->input (chan));
 839         }
 840
 841         add_child (new_config);
 842 }
 843
 844 void
 845 ExportGraphBuilder::ChannelConfig::add_child (FileSpec const & new_config)
 846 {
 847         assert (*this == new_config);
 848
 849         for (boost::ptr_list<SilenceHandler>::iterator it = children.begin(); it != children.end(); ++it) {
 850                 if (*it == new_config) {
 851                         it->add_child (new_config);
 852                         return;
 853                 }
 854         }
 855
 856         children.push_back (new SilenceHandler (parent, new_config, max_samples_out));
 857         chunker->add_output (children.back().sink ());
 858 }
 859
 860 void
 861 ExportGraphBuilder::ChannelConfig::remove_children (bool remove_out_files)
 862 {
 863         boost::ptr_list<SilenceHandler>::iterator iter = children.begin();
 864
 865         while(iter != children.end() ) {
 866
 867                 chunker->remove_output (iter->sink ());
 868                 iter->remove_children (remove_out_files);
 869                 iter = children.erase(iter);
 870         }
 871 }
 872
 873 bool
 874 ExportGraphBuilder::ChannelConfig::operator== (FileSpec const & other_config) const
 875 {
 876         return config.channel_config == other_config.channel_config;
 877 }
 878
 879 } // namespace ARDOUR