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