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 <fstream>
  21 #include <cassert>
  22 #include <cstdio>
  23 #include <unistd.h>
  24 #include <cmath>
  25 #include <cerrno>
  26 #include <string>
  27 #include <climits>
  28 #include <fcntl.h>
  29 #include <cstdlib>
  30 #include <ctime>
  31 #include <sys/stat.h>
  32 #include <sys/mman.h>
  33
  34 #include <sigc++/bind.h>
  35
  36 #include <pbd/error.h>
  37 #include <pbd/basename.h>
  38 #include <glibmm/thread.h>
  39 #include <pbd/xml++.h>
  40
  41 #include <ardour/ardour.h>
  42 #include <ardour/audioengine.h>
  43 #include <ardour/diskstream.h>
  44 #include <ardour/utils.h>
  45 #include <ardour/configuration.h>
  46 #include <ardour/audiofilesource.h>
  47 #include <ardour/send.h>
  48 #include <ardour/playlist.h>
  49 #include <ardour/cycle_timer.h>
  50 #include <ardour/region.h>
  51
  52 #include "i18n.h"
  53 #include <locale.h>
  54
  55 using namespace std;
  56 using namespace ARDOUR;
  57 using namespace PBD;
  58
  59 /* XXX This goes uninitialized when there is no ~/.ardour2 directory.
  60  * I can't figure out why, so this will do for now (just stole the
  61  * default from configuration_vars.h).  0 is not a good value for
  62  * allocating buffer sizes..
  63  */
  64 nframes_t Diskstream::disk_io_chunk_frames = 1024 * 256;
  65
  66 sigc::signal<void>                Diskstream::DiskOverrun;
  67 sigc::signal<void>                Diskstream::DiskUnderrun;
  68
  69 Diskstream::Diskstream (Session &sess, const string &name, Flag flag)
  70         : _name (name)
  71         , _session (sess)
  72 {
  73         init (flag);
  74 }
  75
  76 Diskstream::Diskstream (Session& sess, const XMLNode& node)
  77         : _session (sess)
  78 {
  79         init (Recordable);
  80 }
  81
  82 void
  83 Diskstream::init (Flag f)
  84 {
  85         _flags = f;
  86         _io = 0;
  87         _alignment_style = ExistingMaterial;
  88         _persistent_alignment_style = ExistingMaterial;
  89         first_input_change = true;
  90         i_am_the_modifier = 0;
  91         g_atomic_int_set (&_record_enabled, 0);
  92         was_recording = false;
  93         capture_start_frame = 0;
  94         capture_captured = 0;
  95         _visible_speed = 1.0f;
  96         _actual_speed = 1.0f;
  97         _buffer_reallocation_required = false;
  98         _seek_required = false;
  99         first_recordable_frame = max_frames;
 100         last_recordable_frame = max_frames;
 101         _roll_delay = 0;
 102         _capture_offset = 0;
 103         _processed = false;
 104         _slaved = false;
 105         adjust_capture_position = 0;
 106         last_possibly_recording = 0;
 107         loop_location = 0;
 108         wrap_buffer_size = 0;
 109         speed_buffer_size = 0;
 110         last_phase = 0;
 111         phi = (uint64_t) (0x1000000);
 112         file_frame = 0;
 113         playback_sample = 0;
 114         playback_distance = 0;
 115         _read_data_count = 0;
 116         _write_data_count = 0;
 117
 118         pending_overwrite = false;
 119         overwrite_frame = 0;
 120         overwrite_queued = false;
 121         input_change_pending = NoChange;
 122
 123         _n_channels = 0;
 124 }
 125
 126 Diskstream::~Diskstream ()
 127 {
 128         if (_playlist)
 129                 _playlist->release ();
 130 }
 131
 132 void
 133 Diskstream::set_io (IO& io)
 134 {
 135         _io = &io;
 136         set_align_style_from_io ();
 137 }
 138
 139 void
 140 Diskstream::handle_input_change (IOChange change, void *src)
 141 {
 142         Glib::Mutex::Lock lm (state_lock);
 143
 144         if (!(input_change_pending & change)) {
 145                 input_change_pending = IOChange (input_change_pending|change);
 146                 _session.request_input_change_handling ();
 147         }
 148 }
 149
 150 void
 151 Diskstream::non_realtime_set_speed ()
 152 {
 153         if (_buffer_reallocation_required)
 154         {
 155                 Glib::Mutex::Lock lm (state_lock);
 156                 allocate_temporary_buffers ();
 157
 158                 _buffer_reallocation_required = false;
 159         }
 160
 161         if (_seek_required) {
 162                 if (speed() != 1.0f || speed() != -1.0f) {
 163                         seek ((nframes_t) (_session.transport_frame() * (double) speed()), true);
 164                 }
 165                 else {
 166                         seek (_session.transport_frame(), true);
 167                 }
 168
 169                 _seek_required = false;
 170         }
 171 }
 172
 173 bool
 174 Diskstream::realtime_set_speed (double sp, bool global)
 175 {
 176         bool changed = false;
 177         double new_speed = sp * _session.transport_speed();
 178
 179         if (_visible_speed != sp) {
 180                 _visible_speed = sp;
 181                 changed = true;
 182         }
 183
 184         if (new_speed != _actual_speed) {
 185
 186                 nframes_t required_wrap_size = (nframes_t) floor (_session.get_block_size() *
 187                                                                             fabs (new_speed)) + 1;
 188
 189                 if (required_wrap_size > wrap_buffer_size) {
 190                         _buffer_reallocation_required = true;
 191                 }
 192
 193                 _actual_speed = new_speed;
 194                 phi = (uint64_t) (0x1000000 * fabs(_actual_speed));
 195         }
 196
 197         if (changed) {
 198                 if (!global) {
 199                         _seek_required = true;
 200                 }
 201                 SpeedChanged (); /* EMIT SIGNAL */
 202         }
 203
 204         return _buffer_reallocation_required || _seek_required;
 205 }
 206
 207 void
 208 Diskstream::prepare ()
 209 {
 210         _processed = false;
 211         playback_distance = 0;
 212 }
 213
 214 void
 215 Diskstream::recover ()
 216 {
 217         state_lock.unlock();
 218         _processed = false;
 219 }
 220
 221 void
 222 Diskstream::set_capture_offset ()
 223 {
 224         if (_io == 0) {
 225                 /* can't capture, so forget it */
 226                 return;
 227         }
 228
 229         _capture_offset = _io->input_latency();
 230 }
 231
 232 void
 233 Diskstream::set_align_style (AlignStyle a)
 234 {
 235         if (record_enabled() && _session.actively_recording()) {
 236                 return;
 237         }
 238
 239         if (a != _alignment_style) {
 240                 _alignment_style = a;
 241                 AlignmentStyleChanged ();
 242         }
 243 }
 244
 245 int
 246 Diskstream::set_loop (Location *location)
 247 {
 248         if (location) {
 249                 if (location->start() >= location->end()) {
 250                         error << string_compose(_("Location \"%1\" not valid for track loop (start >= end)"), location->name()) << endl;
 251                         return -1;
 252                 }
 253         }
 254
 255         loop_location = location;
 256
 257          LoopSet (location); /* EMIT SIGNAL */
 258         return 0;
 259 }
 260
 261 nframes_t
 262 Diskstream::get_capture_start_frame (uint32_t n)
 263 {
 264         Glib::Mutex::Lock lm (capture_info_lock);
 265
 266         if (capture_info.size() > n) {
 267                 return capture_info[n]->start;
 268         }
 269         else {
 270                 return capture_start_frame;
 271         }
 272 }
 273
 274 nframes_t
 275 Diskstream::get_captured_frames (uint32_t n)
 276 {
 277         Glib::Mutex::Lock lm (capture_info_lock);
 278
 279         if (capture_info.size() > n) {
 280                 return capture_info[n]->frames;
 281         }
 282         else {
 283                 return capture_captured;
 284         }
 285 }
 286
 287 void
 288 Diskstream::set_roll_delay (nframes_t nframes)
 289 {
 290         _roll_delay = nframes;
 291 }
 292
 293 void
 294 Diskstream::set_speed (double sp)
 295 {
 296         _session.request_diskstream_speed (*this, sp);
 297
 298         /* to force a rebuffering at the right place */
 299         playlist_modified();
 300 }
 301
 302 int
 303 Diskstream::use_playlist (boost::shared_ptr<Playlist> playlist)
 304 {
 305         {
 306                 Glib::Mutex::Lock lm (state_lock);
 307
 308                 if (playlist == _playlist) {
 309                         return 0;
 310                 }
 311
 312                 plmod_connection.disconnect ();
 313                 plgone_connection.disconnect ();
 314
 315                 if (_playlist) {
 316                         _playlist->release();
 317                 }
 318
 319                 _playlist = playlist;
 320                 _playlist->use();
 321
 322                 if (!in_set_state && recordable()) {
 323                         reset_write_sources (false);
 324                 }
 325
 326                 plmod_connection = _playlist->Modified.connect (mem_fun (*this, &Diskstream::playlist_modified));
 327                 plgone_connection = _playlist->GoingAway.connect (bind (mem_fun (*this, &Diskstream::playlist_deleted), boost::weak_ptr<Playlist>(_playlist)));
 328         }
 329
 330         /* don't do this if we've already asked for it *or* if we are setting up
 331            the diskstream for the very first time - the input changed handling will
 332            take care of the buffer refill.
 333         */
 334
 335         if (!overwrite_queued && !(_session.state_of_the_state() & Session::CannotSave)) {
 336                 _session.request_overwrite_buffer (this);
 337                 overwrite_queued = true;
 338         }
 339
 340         PlaylistChanged (); /* EMIT SIGNAL */
 341         _session.set_dirty ();
 342
 343         return 0;
 344 }
 345
 346 void
 347 Diskstream::playlist_changed (Change ignored)
 348 {
 349         playlist_modified ();
 350 }
 351
 352 void
 353 Diskstream::playlist_modified ()
 354 {
 355         if (!i_am_the_modifier && !overwrite_queued) {
 356                 _session.request_overwrite_buffer (this);
 357                 overwrite_queued = true;
 358         }
 359 }
 360
 361 void
 362 Diskstream::playlist_deleted (boost::weak_ptr<Playlist> wpl)
 363 {
 364         boost::shared_ptr<Playlist> pl (wpl.lock());
 365
 366         if (pl == _playlist) {
 367
 368                 /* this catches an ordering issue with session destruction. playlists
 369                    are destroyed before diskstreams. we have to invalidate any handles
 370                    we have to the playlist.
 371                 */
 372
 373                 if (_playlist) {
 374                         _playlist.reset ();
 375                 }
 376         }
 377 }
 378
 379 int
 380 Diskstream::set_name (string str)
 381 {
 382         if (str != _name) {
 383                 assert(playlist());
 384                 playlist()->set_name (str);
 385                 _name = str;
 386
 387                 if (!in_set_state && recordable()) {
 388                         /* rename existing capture files so that they have the correct name */
 389                         return rename_write_sources ();
 390                 } else {
 391                         return -1;
 392                 }
 393         }
 394
 395         return 0;
 396 }
 397
 398 void
 399 Diskstream::remove_region_from_last_capture (boost::weak_ptr<Region> wregion)
 400 {
 401         boost::shared_ptr<Region> region (wregion.lock());
 402
 403         if (!region) {
 404                 return;
 405         }
 406
 407         _last_capture_regions.remove (region);
 408 }
 409