libs/ardour/diskstream.cc

   1 /*
   2     Copyright (C) 2000-2006 Paul Davis
   3
   4     This program is free software; you can redistribute it and/or modify
   5     it under the terms of the GNU General Public License as published by
   6     the Free Software Foundation; either version 2 of the License, or
   7     (at your option) any later version.
   8
   9     This program is distributed in the hope that it will be useful,
  10     but WITHOUT ANY WARRANTY; without even the implied warranty of
  11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12     GNU General Public License for more details.
  13
  14     You should have received a copy of the GNU General Public License
  15     along with this program; if not, write to the Free Software
  16     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  17
  18 */
  19
  20 #include <cassert>
  21 #include <cstdio>
  22 #include <unistd.h>
  23 #include <cmath>
  24 #include <cerrno>
  25 #include <string>
  26 #include <climits>
  27 #include <fcntl.h>
  28 #include <cstdlib>
  29 #include <ctime>
  30 #include <sys/stat.h>
  31
  32 #include <glibmm/threads.h>
  33
  34 #include "pbd/error.h"
  35 #include "pbd/basename.h"
  36 #include "pbd/memento_command.h"
  37 #include "pbd/xml++.h"
  38 #include "pbd/stacktrace.h"
  39 #include "pbd/enum_convert.h"
  40 #include "pbd/types_convert.h"
  41
  42 #include "ardour/debug.h"
  43 #include "ardour/diskstream.h"
  44 #include "ardour/io.h"
  45 #include "ardour/pannable.h"
  46 #include "ardour/profile.h"
  47 #include "ardour/playlist.h"
  48 #include "ardour/session.h"
  49 #include "ardour/session_playlists.h"
  50 #include "ardour/track.h"
  51 #include "ardour/types_convert.h"
  52
  53 #include "pbd/i18n.h"
  54 #include <locale.h>
  55
  56 using namespace std;
  57 using namespace ARDOUR;
  58 using namespace PBD;
  59
  60 namespace PBD {
  61         DEFINE_ENUM_CONVERT(Diskstream::Flag);
  62 }
  63
  64 ARDOUR::framecnt_t Diskstream::disk_read_chunk_frames = default_disk_read_chunk_frames ();
  65 ARDOUR::framecnt_t Diskstream::disk_write_chunk_frames = default_disk_write_chunk_frames ();
  66
  67 PBD::Signal0<void>                Diskstream::DiskOverrun;
  68 PBD::Signal0<void>                Diskstream::DiskUnderrun;
  69
  70 Diskstream::Diskstream (Session &sess, const string &name, Flag flag)
  71         : SessionObject(sess, name)
  72         , i_am_the_modifier (0)
  73         , _track (0)
  74         , _record_enabled (0)
  75             , _record_safe (0)
  76         , _visible_speed (1.0f)
  77         , _actual_speed (1.0f)
  78         , _buffer_reallocation_required (false)
  79         , _seek_required (false)
  80         , capture_start_frame (0)
  81         , capture_captured (0)
  82         , was_recording (false)
  83         , adjust_capture_position (0)
  84         , _capture_offset (0)
  85         , _roll_delay (0)
  86         , first_recordable_frame (max_framepos)
  87         , last_recordable_frame (max_framepos)
  88         , last_possibly_recording (0)
  89         , _alignment_style (ExistingMaterial)
  90         , _alignment_choice (Automatic)
  91         , _slaved (false)
  92         , loop_location (0)
  93         , overwrite_frame (0)
  94         , overwrite_offset (0)
  95         , _pending_overwrite (false)
  96         , overwrite_queued (false)
  97         , wrap_buffer_size (0)
  98         , speed_buffer_size (0)
  99         , _speed (1.0)
 100         , _target_speed (_speed)
 101         , file_frame (0)
 102         , playback_sample (0)
 103         , in_set_state (false)
 104         , _flags (flag)
 105         , deprecated_io_node (0)
 106 {
 107 }
 108
 109 Diskstream::Diskstream (Session& sess, const XMLNode& /*node*/)
 110         : SessionObject(sess, "unnamed diskstream")
 111         , i_am_the_modifier (0)
 112         , _track (0)
 113         , _record_enabled (0)
 114             , _record_safe (0)
 115         , _visible_speed (1.0f)
 116         , _actual_speed (1.0f)
 117         , _buffer_reallocation_required (false)
 118         , _seek_required (false)
 119         , capture_start_frame (0)
 120         , capture_captured (0)
 121         , was_recording (false)
 122         , adjust_capture_position (0)
 123         , _capture_offset (0)
 124         , _roll_delay (0)
 125         , first_recordable_frame (max_framepos)
 126         , last_recordable_frame (max_framepos)
 127         , last_possibly_recording (0)
 128         , _alignment_style (ExistingMaterial)
 129         , _alignment_choice (Automatic)
 130         , _slaved (false)
 131         , loop_location (0)
 132         , overwrite_frame (0)
 133         , overwrite_offset (0)
 134         , _pending_overwrite (false)
 135         , overwrite_queued (false)
 136         , wrap_buffer_size (0)
 137         , speed_buffer_size (0)
 138         , _speed (1.0)
 139         , _target_speed (_speed)
 140         , file_frame (0)
 141         , playback_sample (0)
 142         , in_set_state (false)
 143         , _flags (Recordable)
 144         , deprecated_io_node (0)
 145 {
 146 }
 147
 148 Diskstream::~Diskstream ()
 149 {
 150         DEBUG_TRACE (DEBUG::Destruction, string_compose ("Diskstream %1 deleted\n", _name));
 151
 152         if (_playlist) {
 153                 _playlist->release ();
 154         }
 155
 156         delete deprecated_io_node;
 157 }
 158
 159 bool
 160 Diskstream::non_layered () const
 161 {
 162         return _session.config.get_layered_record_mode();
 163 }
 164
 165 void
 166 Diskstream::set_track (Track* t)
 167 {
 168         _track = t;
 169         _io = _track->input();
 170
 171         ic_connection.disconnect();
 172         _io->changed.connect_same_thread (ic_connection, boost::bind (&Diskstream::handle_input_change, this, _1, _2));
 173
 174         if (_io->n_ports() != ChanCount::ZERO) {
 175                 input_change_pending.type = IOChange::Type (IOChange::ConfigurationChanged|IOChange::ConnectionsChanged);
 176                 non_realtime_input_change ();
 177         }
 178
 179         _track->Destroyed.connect_same_thread (*this, boost::bind (&Diskstream::route_going_away, this));
 180 }
 181
 182 void
 183 Diskstream::handle_input_change (IOChange change, void * /*src*/)
 184 {
 185         Glib::Threads::Mutex::Lock lm (state_lock);
 186
 187         if (change.type & (IOChange::ConfigurationChanged|IOChange::ConnectionsChanged)) {
 188
 189                 /* rather than handle this here on a DS-by-DS basis we defer to the
 190                    session transport/butler thread, and let it tackle
 191                    as many diskstreams as need it in one shot. this avoids many repeated
 192                    takings of the audioengine process lock.
 193                 */
 194
 195                 if (!(input_change_pending.type & change.type)) {
 196                         input_change_pending.type = IOChange::Type (input_change_pending.type | change.type);
 197                         _session.request_input_change_handling ();
 198                 }
 199         }
 200 }
 201
 202 void
 203 Diskstream::non_realtime_set_speed ()
 204 {
 205         if (_buffer_reallocation_required)
 206         {
 207                 Glib::Threads::Mutex::Lock lm (state_lock);
 208                 allocate_temporary_buffers ();
 209
 210                 _buffer_reallocation_required = false;
 211         }
 212
 213         if (_seek_required) {
 214                 if (speed() != 1.0f || speed() != -1.0f) {
 215                         seek ((framepos_t) (_session.transport_frame() * (double) speed()), true);
 216                 }
 217                 else {
 218                         seek (_session.transport_frame(), true);
 219                 }
 220
 221                 _seek_required = false;
 222         }
 223 }
 224
 225 bool
 226 Diskstream::realtime_set_speed (double sp, bool global)
 227 {
 228         bool changed = false;
 229         double new_speed = sp * _session.transport_speed();
 230
 231         if (_visible_speed != sp) {
 232                 _visible_speed = sp;
 233                 changed = true;
 234         }
 235
 236         if (new_speed != _actual_speed) {
 237
 238                 framecnt_t required_wrap_size = (framecnt_t) ceil (_session.get_block_size() *
 239                                                                   fabs (new_speed)) + 2;
 240
 241                 if (required_wrap_size > wrap_buffer_size) {
 242                         _buffer_reallocation_required = true;
 243                 }
 244
 245                 _actual_speed = new_speed;
 246                 _target_speed = fabs(_actual_speed);
 247         }
 248
 249         if (changed) {
 250                 if (!global) {
 251                         _seek_required = true;
 252                 }
 253                 SpeedChanged (); /* EMIT SIGNAL */
 254         }
 255
 256         return _buffer_reallocation_required || _seek_required;
 257 }
 258
 259 void
 260 Diskstream::set_capture_offset ()
 261 {
 262         if (_io == 0) {
 263                 /* can't capture, so forget it */
 264                 return;
 265         }
 266
 267         switch (_alignment_style) {
 268         case ExistingMaterial:
 269                 _capture_offset = _io->latency();
 270 #ifdef MIXBUS
 271                 /* add additional latency, delayline inside the channelstrip + master-bus
 272                  * in MB the master-bus has no input-ports, so its latency does not propagate
 273                  */
 274                 if (_session.master_out()) {
 275                         _capture_offset += _session.master_out()->signal_latency();
 276                 }
 277 #endif
 278
 279                 break;
 280
 281         case CaptureTime:
 282         default:
 283                 _capture_offset = 0;
 284                 break;
 285         }
 286 #ifdef MIXBUS
 287         framecnt_t port_offset;
 288         if (_track->mixbus_internal_bounce (port_offset)) {
 289                 /* _capture_offset may become negative, but the sum
 290                  * _capture_offset + existing_material_offset
 291                  * will be postive.
 292                  */
 293                 _capture_offset -= port_offset;
 294         }
 295 #endif
 296
 297         DEBUG_TRACE (DEBUG::CaptureAlignment, string_compose ("%1: using IO latency, capture offset set to %2 with style = %3\n", name(), _capture_offset, enum_2_string (_alignment_style)));
 298 }
 299
 300
 301 void
 302 Diskstream::set_align_style (AlignStyle a, bool force)
 303 {
 304         if (record_enabled() && _session.actively_recording()) {
 305                 return;
 306         }
 307
 308         if ((a != _alignment_style) || force) {
 309                 _alignment_style = a;
 310                 set_capture_offset ();
 311                 AlignmentStyleChanged ();
 312         }
 313 }
 314
 315 void
 316 Diskstream::set_align_choice (AlignChoice a, bool force)
 317 {
 318         if (record_enabled() && _session.actively_recording()) {
 319                 return;
 320         }
 321
 322         if ((a != _alignment_choice) || force) {
 323                 _alignment_choice = a;
 324
 325                 switch (_alignment_choice) {
 326                         case Automatic:
 327                                 set_align_style_from_io ();
 328                                 break;
 329                         case UseExistingMaterial:
 330                                 set_align_style (ExistingMaterial);
 331                                 break;
 332                         case UseCaptureTime:
 333                                 set_align_style (CaptureTime);
 334                                 break;
 335                 }
 336         }
 337 }
 338
 339 int
 340 Diskstream::set_loop (Location *location)
 341 {
 342         if (location) {
 343                 if (location->start() >= location->end()) {
 344                         error << string_compose(_("Location \"%1\" not valid for track loop (start >= end)"), location->name()) << endl;
 345                         return -1;
 346                 }
 347         }
 348
 349         loop_location = location;
 350
 351         LoopSet (location); /* EMIT SIGNAL */
 352         return 0;
 353 }
 354
 355 /** Get the start position (in session frames) of the nth capture in the current pass */
 356 ARDOUR::framepos_t
 357 Diskstream::get_capture_start_frame (uint32_t n) const
 358 {
 359         Glib::Threads::Mutex::Lock lm (capture_info_lock);
 360
 361         if (capture_info.size() > n) {
 362                 /* this is a completed capture */
 363                 return capture_info[n]->start;
 364         } else {
 365                 /* this is the currently in-progress capture */
 366                 return capture_start_frame;
 367         }
 368 }
 369
 370 ARDOUR::framecnt_t
 371 Diskstream::get_captured_frames (uint32_t n) const
 372 {
 373         Glib::Threads::Mutex::Lock lm (capture_info_lock);
 374
 375         if (capture_info.size() > n) {
 376                 /* this is a completed capture */
 377                 return capture_info[n]->frames;
 378         } else {
 379                 /* this is the currently in-progress capture */
 380                 return capture_captured;
 381         }
 382 }
 383
 384 void
 385 Diskstream::set_roll_delay (ARDOUR::framecnt_t nframes)
 386 {
 387         _roll_delay = nframes;
 388 }
 389
 390 int
 391 Diskstream::use_playlist (boost::shared_ptr<Playlist> playlist)
 392 {
 393         if (!playlist) {
 394                 return 0;
 395         }
 396
 397         bool prior_playlist = false;
 398
 399         {
 400                 Glib::Threads::Mutex::Lock lm (state_lock);
 401
 402                 if (playlist == _playlist) {
 403                         return 0;
 404                 }
 405
 406                 playlist_connections.drop_connections ();
 407
 408                 if (_playlist) {
 409                         _playlist->release();
 410                         prior_playlist = true;
 411                 }
 412
 413                 _playlist = playlist;
 414                 _playlist->use();
 415
 416                 if (!in_set_state && destructive() && recordable()) {
 417                         reset_write_sources (false);
 418                 }
 419
 420                 _playlist->ContentsChanged.connect_same_thread (playlist_connections, boost::bind (&Diskstream::playlist_modified, this));
 421                 _playlist->LayeringChanged.connect_same_thread (playlist_connections, boost::bind (&Diskstream::playlist_modified, this));
 422                 _playlist->DropReferences.connect_same_thread (playlist_connections, boost::bind (&Diskstream::playlist_deleted, this, boost::weak_ptr<Playlist>(_playlist)));
 423                 _playlist->RangesMoved.connect_same_thread (playlist_connections, boost::bind (&Diskstream::playlist_ranges_moved, this, _1, _2));
 424         }
 425
 426         /* don't do this if we've already asked for it *or* if we are setting up
 427            the diskstream for the very first time - the input changed handling will
 428            take care of the buffer refill.
 429         */
 430
 431         if (!overwrite_queued && prior_playlist) {
 432                 _session.request_overwrite_buffer (_track);
 433                 overwrite_queued = true;
 434         }
 435
 436         PlaylistChanged (); /* EMIT SIGNAL */
 437         _session.set_dirty ();
 438
 439         return 0;
 440 }
 441
 442 void
 443 Diskstream::playlist_changed (const PropertyChange&)
 444 {
 445         playlist_modified ();
 446 }
 447
 448 void
 449 Diskstream::playlist_modified ()
 450 {
 451         if (!i_am_the_modifier && !overwrite_queued) {
 452                 _session.request_overwrite_buffer (_track);
 453                 overwrite_queued = true;
 454         }
 455 }
 456
 457 void
 458 Diskstream::playlist_deleted (boost::weak_ptr<Playlist> wpl)
 459 {
 460         boost::shared_ptr<Playlist> pl (wpl.lock());
 461
 462         if (pl == _playlist) {
 463
 464                 /* this catches an ordering issue with session destruction. playlists
 465                    are destroyed before diskstreams. we have to invalidate any handles
 466                    we have to the playlist.
 467                 */
 468
 469                 if (_playlist) {
 470                         _playlist.reset ();
 471                 }
 472         }
 473 }
 474
 475 bool
 476 Diskstream::set_name (const string& str)
 477 {
 478         if (_name != str) {
 479                 assert(playlist());
 480                 std::string name (str);
 481                 while (_session.playlists->by_name (name)) {
 482                         name = Playlist::bump_name (name, _session);
 483                 }
 484                 playlist()->set_name (name);
 485                 SessionObject::set_name(name);
 486         }
 487         return true;
 488 }
 489
 490 bool
 491 Diskstream::set_write_source_name (const std::string& str) {
 492         _write_source_name = str;
 493         return true;
 494 }
 495
 496 XMLNode&
 497 Diskstream::get_state ()
 498 {
 499         XMLNode* node = new XMLNode ("Diskstream");
 500
 501         node->set_property ("flags", _flags);
 502         node->set_property ("playlist", _playlist->name());
 503         node->set_property ("name", name());
 504         node->set_property ("id", id ());
 505         node->set_property ("speed", _visible_speed);
 506         node->set_property ("capture-alignment", _alignment_choice);
 507         node->set_property ("record-safe", _record_safe);
 508
 509         if (_extra_xml) {
 510                 node->add_child_copy (*_extra_xml);
 511         }
 512         return *node;
 513 }
 514
 515 int
 516 Diskstream::set_state (const XMLNode& node, int /*version*/)
 517 {
 518         std::string name;
 519         if (node.get_property ("name", name)) {
 520                 _name = name;
 521         }
 522
 523         if (deprecated_io_node) {
 524                 set_id (*deprecated_io_node);
 525         } else {
 526                 set_id (node);
 527         }
 528
 529         node.get_property ("flags", _flags);
 530
 531         if (Profile->get_trx() && (_flags & Destructive)) {
 532                 error << string_compose (_("%1: this session uses destructive tracks, which are not supported"), PROGRAM_NAME) << endmsg;
 533                 return -1;
 534         }
 535
 536         AlignChoice achoice = Automatic;
 537         node.get_property (X_("capture-alignment"), achoice);
 538         set_align_choice (achoice, true);
 539
 540         XMLProperty const * prop;
 541
 542         if ((prop = node.property ("playlist")) == 0) {
 543                 return -1;
 544         }
 545
 546         if (find_and_use_playlist (prop->value())) {
 547                 return -1;
 548         }
 549
 550         double sp;
 551         if (node.get_property ("speed", sp)) {
 552                 if (realtime_set_speed (sp, false)) {
 553                         non_realtime_set_speed ();
 554                 }
 555         }
 556
 557         bool record_safe;
 558         if (node.get_property ("record-safe", record_safe)) {
 559           _record_safe = record_safe ? 1 : 0;
 560         }
 561
 562         return 0;
 563 }
 564
 565 void
 566 Diskstream::playlist_ranges_moved (list< Evoral::RangeMove<framepos_t> > const & movements_frames, bool from_undo)
 567 {
 568         /* If we're coming from an undo, it will have handled
 569            automation undo (it must, since automation-follows-regions
 570            can lose automation data).  Hence we can do nothing here.
 571         */
 572
 573         if (from_undo) {
 574                 return;
 575         }
 576
 577         if (!_track || Config->get_automation_follows_regions () == false) {
 578                 return;
 579         }
 580
 581         list< Evoral::RangeMove<double> > movements;
 582
 583         for (list< Evoral::RangeMove<framepos_t> >::const_iterator i = movements_frames.begin();
 584              i != movements_frames.end();
 585              ++i) {
 586
 587                 movements.push_back(Evoral::RangeMove<double>(i->from, i->length, i->to));
 588         }
 589
 590         /* move panner automation */
 591         boost::shared_ptr<Pannable> pannable = _track->pannable();
 592         Evoral::ControlSet::Controls& c (pannable->controls());
 593
 594         for (Evoral::ControlSet::Controls::iterator ci = c.begin(); ci != c.end(); ++ci) {
 595                 boost::shared_ptr<AutomationControl> ac = boost::dynamic_pointer_cast<AutomationControl>(ci->second);
 596                 if (!ac) {
 597                         continue;
 598                 }
 599                 boost::shared_ptr<AutomationList> alist = ac->alist();
 600                 if (!alist->size()) {
 601                         continue;
 602                 }
 603                 XMLNode & before = alist->get_state ();
 604                 bool const things_moved = alist->move_ranges (movements);
 605                 if (things_moved) {
 606                         _session.add_command (new MementoCommand<AutomationList> (
 607                                                       *alist.get(), &before, &alist->get_state ()));
 608                 }
 609         }
 610
 611         /* move processor automation */
 612         _track->foreach_processor (boost::bind (&Diskstream::move_processor_automation, this, _1, movements_frames));
 613 }
 614
 615 void
 616 Diskstream::move_processor_automation (boost::weak_ptr<Processor> p, list< Evoral::RangeMove<framepos_t> > const & movements_frames)
 617 {
 618         boost::shared_ptr<Processor> processor (p.lock ());
 619         if (!processor) {
 620                 return;
 621         }
 622
 623         list< Evoral::RangeMove<double> > movements;
 624         for (list< Evoral::RangeMove<framepos_t> >::const_iterator i = movements_frames.begin(); i != movements_frames.end(); ++i) {
 625                 movements.push_back(Evoral::RangeMove<double>(i->from, i->length, i->to));
 626         }
 627
 628         set<Evoral::Parameter> const a = processor->what_can_be_automated ();
 629
 630         for (set<Evoral::Parameter>::const_iterator i = a.begin (); i != a.end (); ++i) {
 631                 boost::shared_ptr<AutomationList> al = processor->automation_control(*i)->alist();
 632                 if (!al->size()) {
 633                         continue;
 634                 }
 635                 XMLNode & before = al->get_state ();
 636                 bool const things_moved = al->move_ranges (movements);
 637                 if (things_moved) {
 638                         _session.add_command (
 639                                 new MementoCommand<AutomationList> (
 640                                         *al.get(), &before, &al->get_state ()
 641                                         )
 642                                 );
 643                 }
 644         }
 645 }
 646
 647 void
 648 Diskstream::check_record_status (framepos_t transport_frame, bool can_record)
 649 {
 650         int possibly_recording;
 651         int rolling;
 652         int change;
 653         const int transport_rolling = 0x4;
 654         const int track_rec_enabled = 0x2;
 655         const int global_rec_enabled = 0x1;
 656         const int fully_rec_enabled = (transport_rolling|track_rec_enabled|global_rec_enabled);
 657
 658         /* merge together the 3 factors that affect record status, and compute
 659          * what has changed.
 660          */
 661
 662         rolling = _session.transport_speed() != 0.0f;
 663         possibly_recording = (rolling << 2) | ((int)record_enabled() << 1) | (int)can_record;
 664         change = possibly_recording ^ last_possibly_recording;
 665
 666         if (possibly_recording == last_possibly_recording) {
 667                 return;
 668         }
 669
 670         const framecnt_t existing_material_offset = _session.worst_playback_latency();
 671
 672         if (possibly_recording == fully_rec_enabled) {
 673
 674                 if (last_possibly_recording == fully_rec_enabled) {
 675                         return;
 676                 }
 677
 678                 capture_start_frame = _session.transport_frame();
 679                 first_recordable_frame = capture_start_frame + _capture_offset;
 680                 last_recordable_frame = max_framepos;
 681
 682                 DEBUG_TRACE (DEBUG::CaptureAlignment, string_compose ("%1: @ %7 (%9) FRF = %2 CSF = %4 CO = %5, EMO = %6 RD = %8 WOL %10 WTL %11\n",
 683                                                                       name(), first_recordable_frame, last_recordable_frame, capture_start_frame,
 684                                                                       _capture_offset,
 685                                                                       existing_material_offset,
 686                                                                       transport_frame,
 687                                                                       _roll_delay,
 688                                                                       _session.transport_frame(),
 689                                                                       _session.worst_output_latency(),
 690                                                                       _session.worst_track_latency()));
 691
 692
 693                 if (_alignment_style == ExistingMaterial) {
 694                         first_recordable_frame += existing_material_offset;
 695                         DEBUG_TRACE (DEBUG::CaptureAlignment, string_compose ("\tshift FRF by EMO %1\n",
 696                                                                               first_recordable_frame));
 697                 }
 698
 699                 prepare_record_status (capture_start_frame);
 700
 701         } else {
 702
 703                 if (last_possibly_recording == fully_rec_enabled) {
 704
 705                         /* we were recording last time */
 706
 707                         if (change & transport_rolling) {
 708
 709                                 /* transport-change (stopped rolling): last_recordable_frame was set in ::prepare_to_stop(). We
 710                                  * had to set it there because we likely rolled past the stopping point to declick out,
 711                                  * and then backed up.
 712                                  */
 713
 714                         } else {
 715                                 /* punch out */
 716
 717                                 last_recordable_frame = _session.transport_frame() + _capture_offset;
 718
 719                                 if (_alignment_style == ExistingMaterial) {
 720                                         last_recordable_frame += existing_material_offset;
 721                                 }
 722                         }
 723                 }
 724         }
 725
 726         last_possibly_recording = possibly_recording;
 727 }
 728
 729 void
 730 Diskstream::route_going_away ()
 731 {
 732         _io.reset ();
 733 }
 734
 735 void
 736 Diskstream::calculate_record_range (Evoral::OverlapType ot, framepos_t transport_frame, framecnt_t nframes,
 737                                     framecnt_t & rec_nframes, framecnt_t & rec_offset)
 738 {
 739         switch (ot) {
 740         case Evoral::OverlapNone:
 741                 rec_nframes = 0;
 742                 break;
 743
 744         case Evoral::OverlapInternal:
 745                 /*     ----------    recrange
 746                  *       |---|       transrange
 747                  */
 748                 rec_nframes = nframes;
 749                 rec_offset = 0;
 750                 break;
 751
 752         case Evoral::OverlapStart:
 753                 /*    |--------|    recrange
 754                  *  -----|          transrange
 755                  */
 756                 rec_nframes = transport_frame + nframes - first_recordable_frame;
 757                 if (rec_nframes) {
 758                         rec_offset = first_recordable_frame - transport_frame;
 759                 }
 760                 break;
 761
 762         case Evoral::OverlapEnd:
 763                 /*    |--------|    recrange
 764                  *       |--------  transrange
 765                  */
 766                 rec_nframes = last_recordable_frame - transport_frame;
 767                 rec_offset = 0;
 768                 break;
 769
 770         case Evoral::OverlapExternal:
 771                 /*    |--------|    recrange
 772                  *  --------------  transrange
 773                  */
 774                 rec_nframes = last_recordable_frame - first_recordable_frame;
 775                 rec_offset = first_recordable_frame - transport_frame;
 776                 break;
 777         }
 778
 779         DEBUG_TRACE (DEBUG::CaptureAlignment, string_compose ("%1 rec? %2 @ %3 (for %4) FRF %5 LRF %6 : rf %7 @ %8\n",
 780                                                               _name, enum_2_string (ot), transport_frame, nframes,
 781                                                               first_recordable_frame, last_recordable_frame, rec_nframes, rec_offset));
 782 }
 783
 784 void
 785 Diskstream::prepare_to_stop (framepos_t transport_frame, framepos_t audible_frame)
 786 {
 787         switch (_alignment_style) {
 788         case ExistingMaterial:
 789                 last_recordable_frame = transport_frame + _capture_offset;
 790                 DEBUG_TRACE (DEBUG::CaptureAlignment, string_compose("%1: prepare to stop sets last recordable frame to %2 + %3 = %4\n", _name, transport_frame, _capture_offset, last_recordable_frame));
 791                 break;
 792
 793         case CaptureTime:
 794                 last_recordable_frame = audible_frame; // note that capture_offset is zero
 795                 /* we may already have captured audio before the last_recordable_frame (audible frame),
 796                    so deal with this.
 797                 */
 798                 if (last_recordable_frame > capture_start_frame) {
 799                         capture_captured = min (capture_captured, last_recordable_frame - capture_start_frame);
 800                 }
 801                 DEBUG_TRACE (DEBUG::CaptureAlignment, string_compose("%1: prepare to stop sets last recordable frame to audible frame @ %2\n", _name, audible_frame));
 802                 break;
 803         }
 804
 805 }
 806
 807 void
 808 Diskstream::engage_record_enable ()
 809 {
 810         g_atomic_int_set (&_record_enabled, 1);
 811 }
 812
 813 void
 814 Diskstream::disengage_record_enable ()
 815 {
 816         g_atomic_int_set (&_record_enabled, 0);
 817 }
 818
 819 void
 820 Diskstream::engage_record_safe ()
 821 {
 822         g_atomic_int_set (&_record_safe, 1);
 823 }
 824
 825 void
 826 Diskstream::disengage_record_safe ()
 827 {
 828         g_atomic_int_set (&_record_safe, 0);
 829 }
 830
 831 framecnt_t
 832 Diskstream::default_disk_read_chunk_frames()
 833 {
 834         return 65536;
 835 }
 836
 837 framecnt_t
 838 Diskstream::default_disk_write_chunk_frames ()
 839 {
 840         return 65536;
 841 }
 842
 843 void
 844 Diskstream::set_buffering_parameters (BufferingPreset bp)
 845 {
 846         framecnt_t read_chunk_size;
 847         framecnt_t read_buffer_size;
 848         framecnt_t write_chunk_size;
 849         framecnt_t write_buffer_size;
 850
 851         if (!get_buffering_presets (bp, read_chunk_size, read_buffer_size, write_chunk_size, write_buffer_size)) {
 852                 return;
 853         }
 854
 855         disk_read_chunk_frames = read_chunk_size;
 856         disk_write_chunk_frames = write_chunk_size;
 857         Config->set_audio_capture_buffer_seconds (write_buffer_size);
 858         Config->set_audio_playback_buffer_seconds (read_buffer_size);
 859
 860         cerr << "Set buffering params to " << disk_read_chunk_frames << '|' << disk_write_chunk_frames << '|'
 861              << Config->get_audio_playback_buffer_seconds() << '|'
 862              << Config->get_audio_capture_buffer_seconds ()
 863              << endl;
 864 }
 865
 866 bool
 867 Diskstream::get_buffering_presets (BufferingPreset bp,
 868                                    framecnt_t& read_chunk_size,
 869                                    framecnt_t& read_buffer_size,
 870                                    framecnt_t& write_chunk_size,
 871                                    framecnt_t& write_buffer_size)
 872 {
 873         switch (bp) {
 874         case Small:
 875                 read_chunk_size = 65536;  /* samples */
 876                 write_chunk_size = 65536; /* samples */
 877                 read_buffer_size = 5;  /* seconds */
 878                 write_buffer_size = 5; /* seconds */
 879                 break;
 880
 881         case Medium:
 882                 read_chunk_size = 262144;  /* samples */
 883                 write_chunk_size = 131072; /* samples */
 884                 read_buffer_size = 10;  /* seconds */
 885                 write_buffer_size = 10; /* seconds */
 886                 break;
 887
 888         case Large:
 889                 read_chunk_size = 524288; /* samples */
 890                 write_chunk_size = 131072; /* samples */
 891                 read_buffer_size = 20; /* seconds */
 892                 write_buffer_size = 20; /* seconds */
 893                 break;
 894
 895         default:
 896                 return false;
 897         }
 898
 899         return true;
 900 }