cinelerra-5.1/cinelerra/playbackengine.C

   1
   2 /*
   3  * CINELERRA
   4  * Copyright (C) 2008 Adam Williams <broadcast at earthling dot net>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License as published by
   8  * the Free Software Foundation; either version 2 of the License, or
   9  * (at your option) any later version.
  10  *
  11  * This program is distributed in the hope that it will be useful,
  12  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  13  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14  * GNU General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU General Public License
  17  * along with this program; if not, write to the Free Software
  18  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  19  *
  20  */
  21
  22 #include "bchash.h"
  23 #include "bcsignals.h"
  24 #include "cache.h"
  25 #include "condition.h"
  26 #include "edl.h"
  27 #include "edlsession.h"
  28 #include "localsession.h"
  29 #include "mbuttons.h"
  30 #include "mutex.h"
  31 #include "mwindow.h"
  32 #include "mwindowgui.h"
  33 #include "patchbay.h"
  34 #include "tracking.h"
  35 #include "playbackengine.h"
  36 #include "playtransport.h"
  37 #include "preferences.h"
  38 #include "renderengine.h"
  39 #include "mainsession.h"
  40 #include "trackcanvas.h"
  41 #include "transportque.h"
  42 #include "vrender.h"
  43
  44
  45 PlaybackEngine::PlaybackEngine(MWindow *mwindow, Canvas *output)
  46  : Thread(1, 0, 0)
  47 {
  48         this->mwindow = mwindow;
  49         this->output = output;
  50         is_playing_back = 0;
  51         tracking_position = 0;
  52         tracking_active = 0;
  53         audio_cache = 0;
  54         video_cache = 0;
  55         command = new TransportCommand();
  56         command->command = STOP;
  57         next_command = new TransportCommand();
  58         next_command->change_type = CHANGE_ALL;
  59         stop_command = new TransportCommand();
  60         stop_command->command = STOP;
  61         stop_command->realtime = 1;
  62         sent_command = new TransportCommand();
  63         sent_command->command = -1;
  64         sent_lock = new Mutex("PlaybackEngine::sent");
  65         tracking_lock = new Mutex("PlaybackEngine::tracking_lock");
  66         renderengine_lock = new Mutex("PlaybackEngine::renderengine_lock");
  67         tracking_done = new Condition(1, "PlaybackEngine::tracking_done");
  68         pause_lock = new Condition(0, "PlaybackEngine::pause_lock");
  69         start_lock = new Condition(0, "PlaybackEngine::start_lock");
  70         input_lock = new Condition(1, "PlaybackEngine::input_lock");
  71         output_lock = new Condition(0, "PlaybackEngine::output_lock", 1);
  72
  73         render_engine = 0;
  74         debug = 0;
  75 }
  76
  77 PlaybackEngine::~PlaybackEngine()
  78 {
  79         done = 1;
  80         output_lock->unlock();
  81         Thread::join();
  82         delete preferences;
  83         delete_render_engine();
  84         delete audio_cache;
  85         delete video_cache;
  86         delete tracking_lock;
  87         delete tracking_done;
  88         delete pause_lock;
  89         delete start_lock;
  90         delete renderengine_lock;
  91         delete command;
  92         delete next_command;
  93         delete stop_command;
  94         delete sent_command;
  95         delete sent_lock;
  96         delete input_lock;
  97         delete output_lock;
  98 }
  99
 100 void PlaybackEngine::create_objects()
 101 {
 102         preferences = new Preferences;
 103         preferences->copy_from(mwindow->preferences);
 104
 105         done = 0;
 106         Thread::start();
 107         start_lock->lock("PlaybackEngine::create_objects");
 108 }
 109
 110 ChannelDB* PlaybackEngine::get_channeldb()
 111 {
 112         PlaybackConfig *config = command->get_edl()->session->playback_config;
 113         switch(config->vconfig->driver)
 114         {
 115                 case VIDEO4LINUX2JPEG:
 116                         return mwindow->channeldb_v4l2jpeg;
 117         }
 118         return 0;
 119 }
 120
 121 int PlaybackEngine::create_render_engine()
 122 {
 123 // Fix playback configurations
 124         delete_render_engine();
 125         render_engine = new RenderEngine(this, preferences, output, 0);
 126 //printf("PlaybackEngine::create_render_engine %d\n", __LINE__);
 127         return 0;
 128 }
 129
 130 void PlaybackEngine::delete_render_engine()
 131 {
 132         renderengine_lock->lock("PlaybackEngine::delete_render_engine");
 133         delete render_engine;
 134         render_engine = 0;
 135         renderengine_lock->unlock();
 136 }
 137
 138 void PlaybackEngine::arm_render_engine()
 139 {
 140         if(render_engine)
 141                 render_engine->arm_command(command);
 142 }
 143
 144 void PlaybackEngine::start_render_engine()
 145 {
 146         if(render_engine) render_engine->start_command();
 147 }
 148
 149 void PlaybackEngine::wait_render_engine()
 150 {
 151         if(command->realtime && render_engine)
 152         {
 153                 render_engine->join();
 154         }
 155 }
 156
 157 void PlaybackEngine::create_cache()
 158 {
 159         if(audio_cache) { delete audio_cache;  audio_cache = 0; }
 160         if(video_cache) { delete video_cache;  video_cache = 0; }
 161         if(!audio_cache) audio_cache = new CICache(preferences);
 162         if(!video_cache) video_cache = new CICache(preferences);
 163 }
 164
 165
 166 void PlaybackEngine::perform_change()
 167 {
 168         switch( command->change_type ) {
 169                 case CHANGE_ALL:
 170                         create_cache();
 171                 case CHANGE_EDL:
 172                         create_render_engine();
 173                         break;
 174                 case CHANGE_PARAMS:
 175                         render_engine->get_edl()->synchronize_params(command->get_edl());
 176                 case CHANGE_NONE:
 177                         break;
 178         }
 179 }
 180
 181 void PlaybackEngine::sync_parameters(EDL *edl)
 182 {
 183 // TODO: lock out render engine from keyframe deletions
 184         command->get_edl()->synchronize_params(edl);
 185         if(render_engine) render_engine->get_edl()->synchronize_params(edl);
 186 }
 187
 188
 189 void PlaybackEngine::interrupt_playback(int wait_tracking)
 190 {
 191         renderengine_lock->lock("PlaybackEngine::interrupt_playback");
 192         if(render_engine)
 193                 render_engine->interrupt_playback();
 194         renderengine_lock->unlock();
 195
 196 // Stop pausing
 197         pause_lock->unlock();
 198
 199 // Wait for tracking to finish if it is running
 200         if(wait_tracking)
 201         {
 202                 tracking_done->lock("PlaybackEngine::interrupt_playback");
 203                 tracking_done->unlock();
 204         }
 205 }
 206
 207
 208 // Return 1 if levels exist
 209 int PlaybackEngine::get_output_levels(double *levels, long position)
 210 {
 211         int result = 0;
 212         if(render_engine && render_engine->do_audio)
 213         {
 214                 result = 1;
 215                 render_engine->get_output_levels(levels, position);
 216         }
 217         return result;
 218 }
 219
 220
 221 int PlaybackEngine::get_module_levels(ArrayList<double> *module_levels, long position)
 222 {
 223         int result = 0;
 224         if(render_engine && render_engine->do_audio)
 225         {
 226                 result = 1;
 227                 render_engine->get_module_levels(module_levels, position);
 228         }
 229         return result;
 230 }
 231
 232 int PlaybackEngine::brender_available(long position)
 233 {
 234         return 0;
 235 }
 236
 237 void PlaybackEngine::init_cursor(int active)
 238 {
 239 }
 240
 241 void PlaybackEngine::init_meters()
 242 {
 243 }
 244
 245 void PlaybackEngine::stop_cursor()
 246 {
 247 }
 248
 249
 250 void PlaybackEngine::init_tracking()
 251 {
 252         tracking_active = !command->single_frame() ? 1 : 0;
 253         tracking_position = command->playbackstart;
 254         tracking_done->lock("PlaybackEngine::init_tracking");
 255         init_cursor(tracking_active);
 256         init_meters();
 257 }
 258
 259 void PlaybackEngine::stop_tracking()
 260 {
 261         tracking_active = 0;
 262         stop_cursor();
 263         tracking_done->unlock();
 264 }
 265
 266 void PlaybackEngine::update_tracking(double position)
 267 {
 268         tracking_lock->lock("PlaybackEngine::update_tracking");
 269         tracking_position = position;
 270 // Signal that the timer is accurate.
 271         if(tracking_active) tracking_active = 2;
 272         tracking_timer.update();
 273         tracking_lock->unlock();
 274 }
 275
 276 double PlaybackEngine::get_tracking_position()
 277 {
 278         double result = 0;
 279
 280         tracking_lock->lock("PlaybackEngine::get_tracking_position");
 281
 282
 283 // Adjust for elapsed time since last update_tracking.
 284 // But tracking timer isn't accurate until the first update_tracking
 285 // so wait.
 286         if(tracking_active == 2)
 287         {
 288 //printf("PlaybackEngine::get_tracking_position %d %d %d\n", command->get_direction(), tracking_position, tracking_timer.get_scaled_difference(command->get_edl()->session->sample_rate));
 289
 290
 291 // Don't interpolate when every frame is played.
 292                 if(command->get_edl()->session->video_every_frame &&
 293                         render_engine &&
 294                         render_engine->do_video)
 295                 {
 296                         result = tracking_position;
 297                 }
 298                 else
 299 // Interpolate
 300                 {
 301                         double loop_start, loop_end;
 302                         int play_loop = command->loop_play ? 1 : 0;
 303                         EDL *edl = command->get_edl();
 304                         int loop_playback = edl->local_session->loop_playback ? 1 : 0;
 305                         if( play_loop || !loop_playback ) {
 306                                 loop_start = command->start_position;
 307                                 loop_end = command->end_position;
 308                         }
 309                         else {
 310                                 loop_start = edl->local_session->loop_start;
 311                                 loop_end = edl->local_session->loop_end;
 312                                 play_loop = 1;
 313                         }
 314                         double loop_size = loop_end - loop_start;
 315
 316                         if( command->get_direction() == PLAY_FORWARD ) {
 317 // Interpolate
 318                                 result = tracking_position +
 319                                         command->get_speed() *
 320                                         tracking_timer.get_difference() /
 321                                         1000.0;
 322
 323 // Compensate for loop
 324 //printf("PlaybackEngine::get_tracking_position 1 %d\n", command->get_edl()->local_session->loop_playback);
 325                                 if( play_loop && loop_size > 0 ) {
 326                                         while( result > loop_end ) result -= loop_size;
 327                                 }
 328                         }
 329                         else {
 330 // Interpolate
 331                                 result = tracking_position -
 332                                         command->get_speed() *
 333                                         tracking_timer.get_difference() /
 334                                         1000.0;
 335
 336 // Compensate for loop
 337                                 if( play_loop && loop_size > 0 ) {
 338                                         while( result < loop_start ) result += loop_size;
 339                                 }
 340                         }
 341
 342                 }
 343         }
 344         else
 345                 result = tracking_position;
 346
 347         tracking_lock->unlock();
 348 //printf("PlaybackEngine::get_tracking_position %f %f %d\n", result, tracking_position, tracking_active);
 349
 350 // Adjust for loop
 351
 352         return result;
 353 }
 354
 355 void PlaybackEngine::update_transport(int command, int paused)
 356 {
 357 //      mwindow->gui->lock_window();
 358 //      mwindow->gui->mbuttons->transport->update_gui_state(command, paused);
 359 //      mwindow->gui->unlock_window();
 360 }
 361
 362 void PlaybackEngine::run()
 363 {
 364         start_lock->unlock();
 365
 366         while( !done ) {
 367 // Wait for current command to finish
 368                 output_lock->lock("PlaybackEngine::run");
 369                 if( done ) break;
 370
 371 // Read the new command
 372                 sent_lock->lock("PlaybackEngine::run");
 373                 int command = sent_command->command;
 374                 if( command >= 0 ) {
 375                         this->command->copy_from(sent_command);
 376 //printf("sent command=%d\n", sent_command->command);
 377                         sent_command->command = -1;
 378                         if( sent_command->locked )
 379                                 input_lock->unlock();
 380                 }
 381                 sent_lock->unlock();
 382                 if( command < 0 ) continue;
 383
 384                 interrupt_playback(0);
 385                 wait_render_engine();
 386
 387 //printf("PlaybackEngine::run 1 %d\n", command->command);
 388
 389                 switch( command ) {
 390 // Parameter change only
 391                 case COMMAND_NONE:
 392                         perform_change();
 393                         break;
 394
 395                 case PAUSE:
 396                         init_cursor(0);
 397                         pause_lock->lock("PlaybackEngine::run");
 398                         stop_cursor();
 399                         break;
 400
 401                 case STOP:
 402 // No changing
 403                         break;
 404
 405                 case CURRENT_FRAME:
 406                 case LAST_FRAME:
 407                         perform_change();
 408                         arm_render_engine();
 409 // Dispatch the command
 410                         start_render_engine();
 411                         break;
 412
 413                 case SINGLE_FRAME_FWD:
 414                 case SINGLE_FRAME_REWIND:
 415 // fall through
 416                 default:
 417                         is_playing_back = 1;
 418                         perform_change();
 419                         arm_render_engine();
 420
 421 // Start tracking after arming so the tracking position doesn't change.
 422 // The tracking for a single frame command occurs during PAUSE
 423                         init_tracking();
 424
 425 // Dispatch the command
 426                         start_render_engine();
 427                         break;
 428                 }
 429 //printf("PlaybackEngine::run 100\n");
 430         }
 431 }
 432
 433
 434 void PlaybackEngine::stop_playback(int wait_tracking)
 435 {
 436         transport_stop(wait_tracking);
 437         renderengine_lock->lock("PlaybackEngine::stop_playback");
 438         if(render_engine)
 439                 render_engine->wait_done();
 440         renderengine_lock->unlock();
 441 }
 442
 443
 444 void PlaybackEngine::send_command(int command, EDL *edl, int wait_tracking, int use_inout)
 445 {
 446 //printf("PlaybackEngine::send_command 1 %d\n", command);
 447 // Stop requires transferring the output buffer to a refresh buffer.
 448         int do_stop = 0, do_resume = 0;
 449         int curr_command = this->command->command;
 450         int curr_single_frame = TransportCommand::single_frame(curr_command);
 451         int curr_direction = TransportCommand::get_direction(curr_command);
 452         int curr_audio = this->command->toggle_audio ?
 453                 !curr_single_frame : curr_single_frame;
 454         int single_frame = TransportCommand::single_frame(command);
 455         int direction = TransportCommand::get_direction(command);
 456         int next_audio = next_command->toggle_audio ? !single_frame : single_frame;
 457
 458 // Dispatch command
 459         switch( command ) {
 460         case FAST_REWIND:       // Commands that play back
 461         case NORMAL_REWIND:
 462         case SLOW_REWIND:
 463         case SINGLE_FRAME_REWIND:
 464         case SINGLE_FRAME_FWD:
 465         case SLOW_FWD:
 466         case NORMAL_FWD:
 467         case FAST_FWD:
 468         case CURRENT_FRAME:
 469         case LAST_FRAME:
 470                 if( curr_command == command && !next_command->speed &&
 471                     !curr_single_frame && curr_audio == next_audio ) {
 472 // Same direction pressed twice, not shuttle, and no change in audio state,  Stop
 473                         do_stop = 1;
 474                         break;
 475                 }
 476 // Resume or change direction
 477                 switch( curr_command ) {
 478                 default:
 479                         transport_stop(curr_direction != direction ? 1 : 0);
 480                         do_resume = 1;
 481 // fall through
 482                 case STOP:
 483                 case COMMAND_NONE:
 484                 case SINGLE_FRAME_FWD:
 485                 case SINGLE_FRAME_REWIND:
 486                 case CURRENT_FRAME:
 487                 case LAST_FRAME:
 488                         next_command->realtime = 1;
 489                         next_command->resume = do_resume;
 490 // Start from scratch
 491                         transport_command(command, CHANGE_NONE, edl, use_inout);
 492                         break;
 493                 }
 494                 break;
 495
 496 // Commands that stop
 497         case STOP:
 498         case REWIND:
 499         case GOTO_END:
 500                 do_stop = 1;
 501                 break;
 502         }
 503
 504         if( do_stop ) {
 505                 transport_stop(wait_tracking);
 506         }
 507 }
 508
 509 int PlaybackEngine::transport_stop(int wait_tracking)
 510 {
 511         interrupt_playback(0);
 512         input_lock->lock("PlaybackEngine::transport_stop");
 513         sent_lock->lock("PlaybackEngine::transport_stop");
 514         sent_command->copy_from(stop_command);
 515         sent_command->locked = wait_tracking ? 1 : 0;
 516                 if( !sent_command->locked )
 517                 input_lock->unlock();
 518         sent_lock->unlock();
 519         output_lock->unlock();
 520         if( wait_tracking ) {
 521                 tracking_done->lock("PlaybackEngine::transport_stop");
 522                 tracking_done->unlock();
 523         }
 524 //printf("send: %d (STOP) 0\n", STOP);
 525         return 0;
 526 }
 527
 528 int PlaybackEngine::transport_command(int command, int change_type, EDL *new_edl, int use_inout)
 529 {
 530         next_command->command = command;
 531         next_command->change_type |= change_type;
 532         if( new_edl ) {
 533 // Just change the EDL if the change requires it because renderengine
 534 // structures won't point to the new EDL otherwise and because copying the
 535 // EDL for every cursor movement is slow.
 536                 switch( change_type ) {
 537                 case CHANGE_EDL:
 538                 case CHANGE_ALL:
 539                         next_command->get_edl()->copy_all(new_edl);
 540                         break;
 541                 case CHANGE_PARAMS:
 542                         next_command->get_edl()->synchronize_params(new_edl);
 543                         break;
 544                 }
 545                 next_command->set_playback_range(new_edl, use_inout,
 546                                 preferences->forward_render_displacement);
 547         }
 548
 549         input_lock->lock("PlaybackEngine::transport_command");
 550         next_command->locked =
 551                 next_command->change_type == CHANGE_NONE ||
 552                 next_command->change_type == CHANGE_PARAMS ? 0 : 1;
 553         sent_lock->lock("PlaybackEngine::transport_command");
 554         sent_command->copy_from(next_command);
 555         if( !sent_command->locked )
 556                 input_lock->unlock();
 557         next_command->reset();
 558         sent_lock->unlock();
 559         output_lock->unlock();
 560 //static const char *types[] = { "NONE",
 561 // "FRAME_FWD", "NORMAL_FWD", "FAST_FWD", "FRAME_REV", "NORMAL_REV", "FAST_REV",
 562 // "STOP",  "PAUSE", "SLOW_FWD", "SLOW_REV", "REWIND", "GOTO_END", "CURRENT_FRAME",
 563 // "LAST_FRAME" };
 564 //printf("send= %d (%s) %d\n", sent_command->command,
 565 // types[sent_command->command], sent_command->locked);
 566         return 0;
 567 }
 568
 569 void PlaybackEngine::refresh_frame(int change_type, EDL *edl, int dir)
 570 {
 571         int command = dir >= 0 ? CURRENT_FRAME : LAST_FRAME;
 572         next_command->realtime = 1;
 573         transport_command(command, change_type, edl);
 574 }
 575