libs/ardour/diskstream.cc

   1 /*
   2     Copyright (C) 2000-2003 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     $Id: diskstream.cc 567 2006-06-07 14:54:12Z trutkin $
  19 */
  20
  21 #include <fstream>
  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 <pbd/error.h>
  35 #include <pbd/basename.h>
  36 #include <glibmm/thread.h>
  37 #include <pbd/xml++.h>
  38
  39 #include <ardour/ardour.h>
  40 #include <ardour/audioengine.h>
  41 #include <ardour/diskstream.h>
  42 #include <ardour/utils.h>
  43 #include <ardour/configuration.h>
  44 #include <ardour/audiofilesource.h>
  45 #include <ardour/destructive_filesource.h>
  46 #include <ardour/send.h>
  47 #include <ardour/playlist.h>
  48 #include <ardour/cycle_timer.h>
  49 #include <ardour/region.h>
  50
  51 #include "i18n.h"
  52 #include <locale.h>
  53
  54 using namespace std;
  55 using namespace ARDOUR;
  56 using namespace PBD;
  57
  58 jack_nframes_t Diskstream::disk_io_chunk_frames;
  59
  60 sigc::signal<void,Diskstream*>    Diskstream::DiskstreamCreated;
  61 //sigc::signal<void,list<AudioFileSource*>*> Diskstream::DeleteSources;
  62 sigc::signal<void>                Diskstream::DiskOverrun;
  63 sigc::signal<void>                Diskstream::DiskUnderrun;
  64
  65 Diskstream::Diskstream (Session &sess, const string &name, Flag flag)
  66         : _name (name)
  67         , _session (sess)
  68 {
  69         init (flag);
  70 }
  71
  72 Diskstream::Diskstream (Session& sess, const XMLNode& node)
  73         : _session (sess)
  74
  75 {
  76         init (Recordable);
  77 }
  78
  79 void
  80 Diskstream::init (Flag f)
  81 {
  82         _refcnt = 0;
  83         _flags = f;
  84         _io = 0;
  85         _alignment_style = ExistingMaterial;
  86         _persistent_alignment_style = ExistingMaterial;
  87         first_input_change = true;
  88         i_am_the_modifier = 0;
  89         g_atomic_int_set (&_record_enabled, 0);
  90         was_recording = false;
  91         capture_start_frame = 0;
  92         capture_captured = 0;
  93         _visible_speed = 1.0f;
  94         _actual_speed = 1.0f;
  95         _buffer_reallocation_required = false;
  96         _seek_required = false;
  97         first_recordable_frame = max_frames;
  98         last_recordable_frame = max_frames;
  99         _roll_delay = 0;
 100         _capture_offset = 0;
 101         _processed = false;
 102         _slaved = false;
 103         adjust_capture_position = 0;
 104         last_possibly_recording = 0;
 105         loop_location = 0;
 106         wrap_buffer_size = 0;
 107         speed_buffer_size = 0;
 108         last_phase = 0;
 109         phi = (uint64_t) (0x1000000);
 110         file_frame = 0;
 111         playback_sample = 0;
 112         playback_distance = 0;
 113         _read_data_count = 0;
 114         _write_data_count = 0;
 115
 116         /* there are no channels at this point, so these
 117            two calls just get speed_buffer_size and wrap_buffer
 118            size setup without duplicating their code.
 119         */
 120
 121         //set_block_size (_session.get_block_size());
 122         //allocate_temporary_buffers ();
 123
 124         pending_overwrite = false;
 125         overwrite_frame = 0;
 126         overwrite_queued = false;
 127         input_change_pending = NoChange;
 128
 129         //add_channel ();
 130         _n_channels = 0;//1;
 131 }
 132
 133 Diskstream::~Diskstream ()
 134 {
 135         // Taken by child.. assure lock?
 136         //Glib::Mutex::Lock lm (state_lock);
 137
 138         //if (_playlist) {
 139         //      _playlist->unref ();
 140         //}
 141
 142         //for (ChannelList::iterator chan = channels.begin(); chan != channels.end(); ++chan) {
 143         //      destroy_channel((*chan));
 144         //}
 145
 146         //channels.clear();
 147 }
 148
 149 void
 150 Diskstream::handle_input_change (IOChange change, void *src)
 151 {
 152         Glib::Mutex::Lock lm (state_lock);
 153
 154         if (!(input_change_pending & change)) {
 155                 input_change_pending = IOChange (input_change_pending|change);
 156                 _session.request_input_change_handling ();
 157         }
 158 }
 159
 160 bool
 161 Diskstream::realtime_set_speed (double sp, bool global)
 162 {
 163         bool changed = false;
 164         double new_speed = sp * _session.transport_speed();
 165
 166         if (_visible_speed != sp) {
 167                 _visible_speed = sp;
 168                 changed = true;
 169         }
 170
 171         if (new_speed != _actual_speed) {
 172
 173                 jack_nframes_t required_wrap_size = (jack_nframes_t) floor (_session.get_block_size() *
 174                                                                             fabs (new_speed)) + 1;
 175
 176                 if (required_wrap_size > wrap_buffer_size) {
 177                         _buffer_reallocation_required = true;
 178                 }
 179
 180                 _actual_speed = new_speed;
 181                 phi = (uint64_t) (0x1000000 * fabs(_actual_speed));
 182         }
 183
 184         if (changed) {
 185                 if (!global) {
 186                         _seek_required = true;
 187                 }
 188                 SpeedChanged (); /* EMIT SIGNAL */
 189         }
 190
 191         return _buffer_reallocation_required || _seek_required;
 192 }
 193
 194 void
 195 Diskstream::prepare ()
 196 {
 197         _processed = false;
 198         playback_distance = 0;
 199 }
 200
 201 void
 202 Diskstream::recover ()
 203 {
 204         state_lock.unlock();
 205         _processed = false;
 206 }
 207
 208 void
 209 Diskstream::set_capture_offset ()
 210 {
 211         if (_io == 0) {
 212                 /* can't capture, so forget it */
 213                 return;
 214         }
 215
 216         _capture_offset = _io->input_latency();
 217 }
 218
 219 void
 220 Diskstream::set_align_style (AlignStyle a)
 221 {
 222         if (record_enabled() && _session.actively_recording()) {
 223                 return;
 224         }
 225
 226
 227         if (a != _alignment_style) {
 228                 _alignment_style = a;
 229                 AlignmentStyleChanged ();
 230         }
 231 }
 232
 233 int
 234 Diskstream::set_loop (Location *location)
 235 {
 236         if (location) {
 237                 if (location->start() >= location->end()) {
 238                         error << string_compose(_("Location \"%1\" not valid for track loop (start >= end)"), location->name()) << endl;
 239                         return -1;
 240                 }
 241         }
 242
 243         loop_location = location;
 244
 245          LoopSet (location); /* EMIT SIGNAL */
 246         return 0;
 247 }
 248
 249 jack_nframes_t
 250 Diskstream::get_capture_start_frame (uint32_t n)
 251 {
 252         Glib::Mutex::Lock lm (capture_info_lock);
 253
 254         if (capture_info.size() > n) {
 255                 return capture_info[n]->start;
 256         }
 257         else {
 258                 return capture_start_frame;
 259         }
 260 }
 261
 262 jack_nframes_t
 263 Diskstream::get_captured_frames (uint32_t n)
 264 {
 265         Glib::Mutex::Lock lm (capture_info_lock);
 266
 267         if (capture_info.size() > n) {
 268                 return capture_info[n]->frames;
 269         }
 270         else {
 271                 return capture_captured;
 272         }
 273 }
 274
 275 void
 276 Diskstream::set_roll_delay (jack_nframes_t nframes)
 277 {
 278         _roll_delay = nframes;
 279 }
 280
 281 void
 282 Diskstream::set_speed (double sp)
 283 {
 284         _session.request_diskstream_speed (*this, sp);
 285
 286         /* to force a rebuffering at the right place */
 287         playlist_modified();
 288 }
 289
 290 void
 291 Diskstream::playlist_changed (Change ignored)
 292 {
 293         playlist_modified ();
 294 }
 295
 296 void
 297 Diskstream::playlist_modified ()
 298 {
 299         if (!i_am_the_modifier && !overwrite_queued) {
 300                 _session.request_overwrite_buffer (this);
 301                 overwrite_queued = true;
 302         }
 303 }
 304
 305 int
 306 Diskstream::set_name (string str, void *src)
 307 {
 308         if (str != _name) {
 309                 assert(playlist());
 310                 playlist()->set_name (str);
 311                 _name = str;
 312
 313                 if (!in_set_state && recordable()) {
 314                         /* rename existing capture files so that they have the correct name */
 315                         return rename_write_sources ();
 316                 } else {
 317                         return -1;
 318                 }
 319         }
 320
 321         return 0;
 322 }
 323
 324 void
 325 Diskstream::set_destructive (bool yn)
 326 {
 327         if (yn != destructive()) {
 328                 reset_write_sources (true, true);
 329                 if (yn) {
 330                         _flags |= Destructive;
 331                 } else {
 332                         _flags &= ~Destructive;
 333                 }
 334         }
 335 }