libs/ardour/session_time.cc

   1
   2 /*
   3   Copyright (C) 1999-2002 Paul Davis
   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 #ifdef WAF_BUILD
  22 #include "libardour-config.h"
  23 #endif
  24
  25 #include <iostream>
  26 #include <cmath>
  27 #include <unistd.h>
  28
  29 #include "ardour/timestamps.h"
  30
  31 #include "pbd/error.h"
  32 #include "pbd/enumwriter.h"
  33 #include "pbd/stacktrace.h"
  34
  35 #include "ardour/session.h"
  36 #include "ardour/tempo.h"
  37
  38 #include "i18n.h"
  39
  40 using namespace std;
  41 using namespace ARDOUR;
  42 using namespace PBD;
  43
  44 /* BBT TIME*/
  45
  46 void
  47 Session::bbt_time (framepos_t when, Timecode::BBT_Time& bbt)
  48 {
  49         _tempo_map->bbt_time (when, bbt);
  50 }
  51
  52 /* Timecode TIME */
  53
  54 double
  55 Session::timecode_frames_per_second() const
  56 {
  57         return Timecode::timecode_to_frames_per_second (config.get_timecode_format());
  58 }
  59
  60 bool
  61 Session::timecode_drop_frames() const
  62 {
  63         return Timecode::timecode_has_drop_frames(config.get_timecode_format());
  64 }
  65
  66 void
  67 Session::sync_time_vars ()
  68 {
  69         _current_frame_rate = (framecnt_t) round (_base_frame_rate * (1.0 + (config.get_video_pullup()/100.0)));
  70         _frames_per_timecode_frame = (double) _current_frame_rate / (double) timecode_frames_per_second();
  71         if (timecode_drop_frames()) {
  72           _frames_per_hour = (int32_t)(107892 * _frames_per_timecode_frame);
  73         } else {
  74           _frames_per_hour = (int32_t)(3600 * rint(timecode_frames_per_second()) * _frames_per_timecode_frame);
  75         }
  76         _timecode_frames_per_hour = rint(timecode_frames_per_second() * 3600.0);
  77
  78         last_timecode_valid = false;
  79         // timecode type bits are the middle two in the upper nibble
  80         switch ((int) ceil (timecode_frames_per_second())) {
  81         case 24:
  82                 mtc_timecode_bits = 0;
  83                 break;
  84
  85         case 25:
  86                 mtc_timecode_bits = 0x20;
  87                 break;
  88
  89         case 30:
  90         default:
  91                 if (timecode_drop_frames()) {
  92                         mtc_timecode_bits = 0x40;
  93                 } else {
  94                         mtc_timecode_bits =  0x60;
  95                 }
  96                 break;
  97         };
  98 }
  99
 100 void
 101 Session::timecode_to_sample( Timecode::Time& timecode, framepos_t& sample, bool use_offset, bool use_subframes ) const
 102 {
 103         timecode.rate = timecode_frames_per_second();
 104
 105         Timecode::timecode_to_sample(
 106                 timecode, sample, use_offset, use_subframes,
 107                 _current_frame_rate,
 108                 config.get_subframes_per_frame(),
 109                 config.get_timecode_offset_negative(), config.get_timecode_offset()
 110                 );
 111
 112 }
 113
 114 void
 115 Session::sample_to_timecode (framepos_t sample, Timecode::Time& timecode, bool use_offset, bool use_subframes ) const
 116 {
 117         Timecode::sample_to_timecode (
 118                 sample, timecode, use_offset, use_subframes,
 119
 120                 timecode_frames_per_second(),
 121                 timecode_drop_frames(),
 122                 double(_current_frame_rate),
 123
 124                 config.get_subframes_per_frame(),
 125                 config.get_timecode_offset_negative(), config.get_timecode_offset()
 126                 );
 127 }
 128
 129 void
 130 Session::timecode_time (framepos_t when, Timecode::Time& timecode)
 131 {
 132         if (last_timecode_valid && when == last_timecode_when) {
 133                 timecode = last_timecode;
 134                 return;
 135         }
 136
 137         this->sample_to_timecode( when, timecode, true /* use_offset */, false /* use_subframes */ );
 138
 139         last_timecode_when = when;
 140         last_timecode = timecode;
 141         last_timecode_valid = true;
 142 }
 143
 144 void
 145 Session::timecode_time_subframes (framepos_t when, Timecode::Time& timecode)
 146 {
 147         if (last_timecode_valid && when == last_timecode_when) {
 148                 timecode = last_timecode;
 149                 return;
 150         }
 151
 152         this->sample_to_timecode( when, timecode, true /* use_offset */, true /* use_subframes */ );
 153
 154         last_timecode_when = when;
 155         last_timecode = timecode;
 156         last_timecode_valid = true;
 157 }
 158
 159 void
 160 Session::timecode_duration (framecnt_t when, Timecode::Time& timecode) const
 161 {
 162         this->sample_to_timecode( when, timecode, false /* use_offset */, true /* use_subframes */ );
 163 }
 164
 165 void
 166 Session::timecode_duration_string (char* buf, framepos_t when) const
 167 {
 168         Timecode::Time timecode;
 169
 170         timecode_duration (when, timecode);
 171         snprintf (buf, sizeof (buf), "%02" PRIu32 ":%02" PRIu32 ":%02" PRIu32 ":%02" PRIu32, timecode.hours, timecode.minutes, timecode.seconds, timecode.frames);
 172 }
 173
 174 void
 175 Session::timecode_time (Timecode::Time &t)
 176
 177 {
 178         timecode_time (_transport_frame, t);
 179 }
 180
 181 int
 182 Session::jack_sync_callback (jack_transport_state_t state,
 183                              jack_position_t* pos)
 184 {
 185         bool slave = synced_to_jack();
 186
 187         switch (state) {
 188         case JackTransportStopped:
 189                 if (slave && _transport_frame != pos->frame && post_transport_work() == 0) {
 190                         request_locate (pos->frame, false);
 191                         // cerr << "SYNC: stopped, locate to " << pos->frame << " from " << _transport_frame << endl;
 192                         return false;
 193                 } else {
 194                         return true;
 195                 }
 196
 197         case JackTransportStarting:
 198                 // cerr << "SYNC: starting @ " << pos->frame << " a@ " << _transport_frame << " our work = " <<  post_transport_work() << " pos matches ? " << (_transport_frame == pos->frame) << endl;
 199                 if (slave) {
 200                         return _transport_frame == pos->frame && post_transport_work() == 0;
 201                 } else {
 202                         return true;
 203                 }
 204                 break;
 205
 206         case JackTransportRolling:
 207                 // cerr << "SYNC: rolling slave = " << slave << endl;
 208                 if (slave) {
 209                         start_transport ();
 210                 }
 211                 break;
 212
 213         default:
 214                 error << string_compose (_("Unknown JACK transport state %1 in sync callback"), state)
 215                       << endmsg;
 216         }
 217
 218         return true;
 219 }
 220
 221 void
 222 Session::jack_timebase_callback (jack_transport_state_t /*state*/,
 223                                  pframes_t /*nframes*/,
 224                                  jack_position_t* pos,
 225                                  int /*new_position*/)
 226 {
 227         Timecode::BBT_Time bbt;
 228
 229         if (pos->frame != _transport_frame) {
 230                 cerr << "ARDOUR says " << _transport_frame << " JACK says " << pos->frame << endl;
 231         }
 232
 233         /* BBT info */
 234
 235         if (_tempo_map) {
 236
 237                 TempoMetric metric (_tempo_map->metric_at (_transport_frame));
 238
 239                 try {
 240                         _tempo_map->bbt_time_rt (_transport_frame, bbt);
 241
 242                         pos->bar = bbt.bars;
 243                         pos->beat = bbt.beats;
 244                         pos->tick = bbt.ticks;
 245
 246                         // XXX still need to set bar_start_tick
 247
 248                         pos->beats_per_bar = metric.meter().divisions_per_bar();
 249                         pos->beat_type = metric.meter().note_divisor();
 250                         pos->ticks_per_beat = Timecode::BBT_Time::ticks_per_beat;
 251                         pos->beats_per_minute = metric.tempo().beats_per_minute();
 252
 253                         pos->valid = jack_position_bits_t (pos->valid | JackPositionBBT);
 254
 255                 } catch (...) {
 256                         /* no message */
 257                 }
 258         }
 259
 260 #ifdef HAVE_JACK_VIDEO_SUPPORT
 261         //poke audio video ratio so Ardour can track Video Sync
 262         pos->audio_frames_per_video_frame = frame_rate() / timecode_frames_per_second();
 263         pos->valid = jack_position_bits_t (pos->valid | JackAudioVideoRatio);
 264 #endif
 265
 266 #if 0
 267         /* Timecode info */
 268
 269         pos->timecode_offset = config.get_timecode_offset();
 270         t.timecode_frame_rate = timecode_frames_per_second();
 271         pos->valid = jack_position_bits_t (pos->valid | JackPositionTimecode;
 272
 273         if (_transport_speed) {
 274
 275                 if (play_loop) {
 276
 277                         Location* location = _locations.auto_loop_location();
 278
 279                         if (location) {
 280
 281                                 t.transport_state = JackTransportLooping;
 282                                 t.loop_start = location->start();
 283                                 t.loop_end = location->end();
 284                                 t.valid = jack_transport_bits_t (t.valid | JackTransportLoop);
 285
 286                         } else {
 287
 288                                 t.loop_start = 0;
 289                                 t.loop_end = 0;
 290                                 t.transport_state = JackTransportRolling;
 291
 292                         }
 293
 294                 } else {
 295
 296                         t.loop_start = 0;
 297                         t.loop_end = 0;
 298                         t.transport_state = JackTransportRolling;
 299
 300                 }
 301
 302         }
 303 #endif
 304 }
 305
 306 ARDOUR::framecnt_t
 307 Session::convert_to_frames (AnyTime const & position)
 308 {
 309         double secs;
 310
 311         switch (position.type) {
 312         case AnyTime::BBT:
 313                 return _tempo_map->frame_time (position.bbt);
 314                 break;
 315
 316         case AnyTime::Timecode:
 317                 /* XXX need to handle negative values */
 318                 secs = position.timecode.hours * 60 * 60;
 319                 secs += position.timecode.minutes * 60;
 320                 secs += position.timecode.seconds;
 321                 secs += position.timecode.frames / timecode_frames_per_second();
 322                 if (config.get_timecode_offset_negative()) {
 323                         return (framecnt_t) floor (secs * frame_rate()) - config.get_timecode_offset();
 324                 } else {
 325                         return (framecnt_t) floor (secs * frame_rate()) + config.get_timecode_offset();
 326                 }
 327                 break;
 328
 329         case AnyTime::Seconds:
 330                 return (framecnt_t) floor (position.seconds * frame_rate());
 331                 break;
 332
 333         case AnyTime::Frames:
 334                 return position.frames;
 335                 break;
 336         }
 337
 338         return position.frames;
 339 }
 340
 341 ARDOUR::framecnt_t
 342 Session::any_duration_to_frames (framepos_t position, AnyTime const & duration)
 343 {
 344         double secs;
 345
 346         switch (duration.type) {
 347         case AnyTime::BBT:
 348                 return (framecnt_t) ( _tempo_map->framepos_plus_bbt (position, duration.bbt) - position);
 349                 break;
 350
 351         case AnyTime::Timecode:
 352                 /* XXX need to handle negative values */
 353                 secs = duration.timecode.hours * 60 * 60;
 354                 secs += duration.timecode.minutes * 60;
 355                 secs += duration.timecode.seconds;
 356                 secs += duration.timecode.frames / timecode_frames_per_second();
 357                 if (config.get_timecode_offset_negative()) {
 358                         return (framecnt_t) floor (secs * frame_rate()) - config.get_timecode_offset();
 359                 } else {
 360                         return (framecnt_t) floor (secs * frame_rate()) + config.get_timecode_offset();
 361                 }
 362                 break;
 363
 364         case AnyTime::Seconds:
 365                 return (framecnt_t) floor (duration.seconds * frame_rate());
 366                 break;
 367
 368         case AnyTime::Frames:
 369                 return duration.frames;
 370                 break;
 371         }
 372
 373         return duration.frames;
 374 }