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         curr_command = new TransportCommand();
  60         stop_command = new TransportCommand();
  61         stop_command->command = STOP;
  62         tracking_lock = new Mutex("PlaybackEngine::tracking_lock");
  63         renderengine_lock = new Mutex("PlaybackEngine::renderengine_lock");
  64         tracking_done = new Condition(1, "PlaybackEngine::tracking_done");
  65         pause_lock = new Condition(0, "PlaybackEngine::pause_lock");
  66         start_lock = new Condition(0, "PlaybackEngine::start_lock");
  67         input_lock = new Condition(1, "PlaybackEngine::input_lock");
  68         output_lock = new Condition(0, "PlaybackEngine::output_lock", 1);
  69
  70         render_engine = 0;
  71         debug = 0;
  72 }
  73
  74 PlaybackEngine::~PlaybackEngine()
  75 {
  76         done = 1;
  77         transport_stop();
  78         interrupt_playback();
  79
  80         Thread::join();
  81         delete preferences;
  82         delete_render_engine();
  83         delete audio_cache;
  84         delete video_cache;
  85         delete tracking_lock;
  86         delete tracking_done;
  87         delete pause_lock;
  88         delete start_lock;
  89         delete renderengine_lock;
  90         delete command;
  91         delete next_command;
  92         delete curr_command;
  93         delete stop_command;
  94         delete input_lock;
  95         delete output_lock;
  96 }
  97
  98 void PlaybackEngine::create_objects()
  99 {
 100         preferences = new Preferences;
 101         preferences->copy_from(mwindow->preferences);
 102
 103         done = 0;
 104         Thread::start();
 105         start_lock->lock("PlaybackEngine::create_objects");
 106 }
 107
 108 ChannelDB* PlaybackEngine::get_channeldb()
 109 {
 110         PlaybackConfig *config = command->get_edl()->session->playback_config;
 111         switch(config->vconfig->driver)
 112         {
 113                 case VIDEO4LINUX2JPEG:
 114                         return mwindow->channeldb_v4l2jpeg;
 115         }
 116         return 0;
 117 }
 118
 119 int PlaybackEngine::create_render_engine()
 120 {
 121 // Fix playback configurations
 122         delete_render_engine();
 123         render_engine = new RenderEngine(this, preferences, output, 0);
 124 //printf("PlaybackEngine::create_render_engine %d\n", __LINE__);
 125         return 0;
 126 }
 127
 128 void PlaybackEngine::delete_render_engine()
 129 {
 130         renderengine_lock->lock("PlaybackEngine::delete_render_engine");
 131         delete render_engine;
 132         render_engine = 0;
 133         renderengine_lock->unlock();
 134 }
 135
 136 void PlaybackEngine::arm_render_engine()
 137 {
 138         if(render_engine)
 139                 render_engine->arm_command(command);
 140 }
 141
 142 void PlaybackEngine::start_render_engine()
 143 {
 144         if(render_engine) render_engine->start_command();
 145 }
 146
 147 void PlaybackEngine::wait_render_engine()
 148 {
 149         if(command->realtime && render_engine)
 150         {
 151                 render_engine->join();
 152         }
 153 }
 154
 155 void PlaybackEngine::create_cache()
 156 {
 157         if(audio_cache) { delete audio_cache;  audio_cache = 0; }
 158         if(video_cache) { delete video_cache;  video_cache = 0; }
 159         if(!audio_cache) audio_cache = new CICache(preferences);
 160         if(!video_cache) video_cache = new CICache(preferences);
 161 }
 162
 163
 164 void PlaybackEngine::perform_change()
 165 {
 166         switch( command->change_type )
 167         {
 168                 case CHANGE_ALL:
 169                         create_cache();
 170                 case CHANGE_EDL:
 171                         create_render_engine();
 172                 case CHANGE_PARAMS:
 173                         if(command->change_type != CHANGE_EDL &&
 174                                 (uint32_t)command->change_type != CHANGE_ALL)
 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                 wait_render_engine();
 370
 371 // Read the new command
 372                 input_lock->lock("PlaybackEngine::run");
 373                 if( done ) return;
 374                 command->copy_from(curr_command);
 375                 input_lock->unlock();
 376 //printf("PlaybackEngine::run 1 %d\n", command->command);
 377
 378                 switch( command->command ) {
 379 // Parameter change only
 380                 case COMMAND_NONE:
 381                         perform_change();
 382                         break;
 383
 384                 case PAUSE:
 385                         init_cursor(0);
 386                         pause_lock->lock("PlaybackEngine::run");
 387                         stop_cursor();
 388                         break;
 389
 390                 case STOP:
 391 // No changing
 392                         break;
 393
 394                 case CURRENT_FRAME:
 395                 case LAST_FRAME:
 396                         perform_change();
 397                         arm_render_engine();
 398 // Dispatch the command
 399                         start_render_engine();
 400                         break;
 401
 402                 case SINGLE_FRAME_FWD:
 403                 case SINGLE_FRAME_REWIND:
 404 // fall through
 405                 default:
 406                         is_playing_back = 1;
 407
 408                         perform_change();
 409                         arm_render_engine();
 410
 411 // Start tracking after arming so the tracking position doesn't change.
 412 // The tracking for a single frame command occurs during PAUSE
 413                         init_tracking();
 414
 415 // Dispatch the command
 416                         start_render_engine();
 417                         break;
 418                 }
 419
 420
 421 //printf("PlaybackEngine::run 100\n");
 422         }
 423 }
 424
 425
 426 void PlaybackEngine::stop_playback(int wait)
 427 {
 428         transport_stop();
 429         interrupt_playback(wait);
 430         renderengine_lock->lock("PlaybackEngine::stop_playback");
 431         if(render_engine)
 432                 render_engine->wait_done();
 433         renderengine_lock->unlock();
 434 }
 435
 436
 437 void PlaybackEngine::send_command(int command, EDL *edl, int wait_tracking, int use_inout)
 438 {
 439 //printf("PlaybackEngine::send_command 1 %d\n", command);
 440 // Stop requires transferring the output buffer to a refresh buffer.
 441         int do_stop = 0, do_resume = 0;
 442         int curr_command = this->command->command;
 443         int curr_single_frame = TransportCommand::single_frame(curr_command);
 444         int curr_audio = this->command->toggle_audio ?
 445                 !curr_single_frame : curr_single_frame;
 446         int single_frame = TransportCommand::single_frame(command);
 447         int next_audio = next_command->toggle_audio ? !single_frame : single_frame;
 448
 449 // Dispatch command
 450         switch( command ) {
 451         case FAST_REWIND:       // Commands that play back
 452         case NORMAL_REWIND:
 453         case SLOW_REWIND:
 454         case SINGLE_FRAME_REWIND:
 455         case SINGLE_FRAME_FWD:
 456         case SLOW_FWD:
 457         case NORMAL_FWD:
 458         case FAST_FWD:
 459         case CURRENT_FRAME:
 460         case LAST_FRAME:
 461                 if( curr_command == command && !next_command->speed &&
 462                     !curr_single_frame && curr_audio == next_audio ) {
 463 // Same direction pressed twice, not shuttle, and no change in audio state,  Stop
 464                         do_stop = 1;
 465                         break;
 466                 }
 467 // Resume or change direction
 468                 switch( curr_command ) {
 469                 default:
 470                         transport_stop();
 471                         interrupt_playback(wait_tracking);
 472                         do_resume = 1;
 473 // fall through
 474                 case STOP:
 475                 case COMMAND_NONE:
 476                 case SINGLE_FRAME_FWD:
 477                 case SINGLE_FRAME_REWIND:
 478                 case CURRENT_FRAME:
 479                 case LAST_FRAME:
 480                         next_command->realtime = 1;
 481                         next_command->resume = do_resume;
 482 // Start from scratch
 483                         transport_command(command, CHANGE_NONE, edl, use_inout);
 484                         break;
 485                 }
 486                 break;
 487
 488 // Commands that stop
 489         case STOP:
 490         case REWIND:
 491         case GOTO_END:
 492                 do_stop = 1;
 493                 break;
 494         }
 495
 496         if( do_stop ) {
 497                 transport_stop();
 498                 interrupt_playback(wait_tracking);
 499         }
 500 }
 501
 502 int PlaybackEngine::transport_stop()
 503 {
 504         input_lock->lock("PlaybackEngine::transport_stop 1");
 505         curr_command->copy_from(stop_command);
 506         input_lock->unlock();
 507         output_lock->unlock();
 508         return 0;
 509 }
 510
 511 int PlaybackEngine::transport_command(int command, int change_type, EDL *new_edl, int use_inout)
 512 {
 513         input_lock->lock("PlaybackEngine::transport_command 1");
 514         next_command->command = command;
 515         next_command->change_type |= change_type;
 516         if( new_edl ) {
 517 // Just change the EDL if the change requires it because renderengine
 518 // structures won't point to the new EDL otherwise and because copying the
 519 // EDL for every cursor movement is slow.
 520                 switch( change_type ) {
 521                 case CHANGE_EDL:
 522                 case CHANGE_ALL:
 523                         next_command->get_edl()->copy_all(new_edl);
 524                         break;
 525                 case CHANGE_PARAMS:
 526                         next_command->get_edl()->synchronize_params(new_edl);
 527                         break;
 528                 }
 529                 next_command->set_playback_range(new_edl, use_inout,
 530                                 preferences->forward_render_displacement);
 531         }
 532         curr_command->copy_from(next_command);
 533         next_command->reset();
 534         input_lock->unlock();
 535         output_lock->unlock();
 536         return 0;
 537 }
 538
 539 void PlaybackEngine::refresh_frame(int change_type, EDL *edl, int dir)
 540 {
 541         int command = dir >= 0 ? CURRENT_FRAME : LAST_FRAME;
 542         next_command->realtime = 1;
 543         transport_command(command, change_type, edl);
 544 }
 545