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(0);
  78         Thread::join();
  79         delete preferences;
  80         delete_render_engine();
  81         delete audio_cache;
  82         delete video_cache;
  83         delete tracking_lock;
  84         delete tracking_done;
  85         delete pause_lock;
  86         delete start_lock;
  87         delete renderengine_lock;
  88         delete command;
  89         delete next_command;
  90         delete stop_command;
  91         delete curr_command;
  92         delete input_lock;
  93         delete output_lock;
  94 }
  95
  96 void PlaybackEngine::create_objects()
  97 {
  98         preferences = new Preferences;
  99         preferences->copy_from(mwindow->preferences);
 100
 101         done = 0;
 102         Thread::start();
 103         start_lock->lock("PlaybackEngine::create_objects");
 104 }
 105
 106 ChannelDB* PlaybackEngine::get_channeldb()
 107 {
 108         PlaybackConfig *config = command->get_edl()->session->playback_config;
 109         switch(config->vconfig->driver)
 110         {
 111                 case VIDEO4LINUX2JPEG:
 112                         return mwindow->channeldb_v4l2jpeg;
 113         }
 114         return 0;
 115 }
 116
 117 int PlaybackEngine::create_render_engine()
 118 {
 119 // Fix playback configurations
 120         delete_render_engine();
 121         render_engine = new RenderEngine(this, preferences, output, 0);
 122 //printf("PlaybackEngine::create_render_engine %d\n", __LINE__);
 123         return 0;
 124 }
 125
 126 void PlaybackEngine::delete_render_engine()
 127 {
 128         renderengine_lock->lock("PlaybackEngine::delete_render_engine");
 129         delete render_engine;
 130         render_engine = 0;
 131         renderengine_lock->unlock();
 132 }
 133
 134 void PlaybackEngine::arm_render_engine()
 135 {
 136         if(render_engine)
 137                 render_engine->arm_command(command);
 138 }
 139
 140 void PlaybackEngine::start_render_engine()
 141 {
 142         if(render_engine) render_engine->start_command();
 143 }
 144
 145 void PlaybackEngine::wait_render_engine()
 146 {
 147         if(command->realtime && render_engine)
 148         {
 149                 render_engine->join();
 150         }
 151 }
 152
 153 void PlaybackEngine::create_cache()
 154 {
 155         if(audio_cache) { delete audio_cache;  audio_cache = 0; }
 156         if(video_cache) { delete video_cache;  video_cache = 0; }
 157         if(!audio_cache) audio_cache = new CICache(preferences);
 158         if(!video_cache) video_cache = new CICache(preferences);
 159 }
 160
 161
 162 void PlaybackEngine::perform_change()
 163 {
 164         switch( command->change_type )
 165         {
 166                 case CHANGE_ALL:
 167                         create_cache();
 168                 case CHANGE_EDL:
 169                         create_render_engine();
 170                 case CHANGE_PARAMS:
 171                         if(command->change_type != CHANGE_EDL &&
 172                                 (uint32_t)command->change_type != CHANGE_ALL)
 173                                 render_engine->get_edl()->synchronize_params(command->get_edl());
 174                 case CHANGE_NONE:
 175                         break;
 176         }
 177 }
 178
 179 void PlaybackEngine::sync_parameters(EDL *edl)
 180 {
 181 // TODO: lock out render engine from keyframe deletions
 182         command->get_edl()->synchronize_params(edl);
 183         if(render_engine) render_engine->get_edl()->synchronize_params(edl);
 184 }
 185
 186
 187 void PlaybackEngine::interrupt_playback(int wait_tracking)
 188 {
 189         renderengine_lock->lock("PlaybackEngine::interrupt_playback");
 190         if(render_engine)
 191                 render_engine->interrupt_playback();
 192         renderengine_lock->unlock();
 193
 194 // Stop pausing
 195         pause_lock->unlock();
 196
 197 // Wait for tracking to finish if it is running
 198         if(wait_tracking)
 199         {
 200                 tracking_done->lock("PlaybackEngine::interrupt_playback");
 201                 tracking_done->unlock();
 202         }
 203 }
 204
 205
 206 // Return 1 if levels exist
 207 int PlaybackEngine::get_output_levels(double *levels, long position)
 208 {
 209         int result = 0;
 210         if(render_engine && render_engine->do_audio)
 211         {
 212                 result = 1;
 213                 render_engine->get_output_levels(levels, position);
 214         }
 215         return result;
 216 }
 217
 218
 219 int PlaybackEngine::get_module_levels(ArrayList<double> *module_levels, long position)
 220 {
 221         int result = 0;
 222         if(render_engine && render_engine->do_audio)
 223         {
 224                 result = 1;
 225                 render_engine->get_module_levels(module_levels, position);
 226         }
 227         return result;
 228 }
 229
 230 int PlaybackEngine::brender_available(long position)
 231 {
 232         return 0;
 233 }
 234
 235 void PlaybackEngine::init_cursor(int active)
 236 {
 237 }
 238
 239 void PlaybackEngine::init_meters()
 240 {
 241 }
 242
 243 void PlaybackEngine::stop_cursor()
 244 {
 245 }
 246
 247
 248 void PlaybackEngine::init_tracking()
 249 {
 250         tracking_active = !command->single_frame() ? 1 : 0;
 251         tracking_position = command->playbackstart;
 252         tracking_done->lock("PlaybackEngine::init_tracking");
 253         init_cursor(tracking_active);
 254         init_meters();
 255 }
 256
 257 void PlaybackEngine::stop_tracking()
 258 {
 259         tracking_active = 0;
 260         stop_cursor();
 261         tracking_done->unlock();
 262 }
 263
 264 void PlaybackEngine::update_tracking(double position)
 265 {
 266         tracking_lock->lock("PlaybackEngine::update_tracking");
 267         tracking_position = position;
 268 // Signal that the timer is accurate.
 269         if(tracking_active) tracking_active = 2;
 270         tracking_timer.update();
 271         tracking_lock->unlock();
 272 }
 273
 274 double PlaybackEngine::get_tracking_position()
 275 {
 276         double result = 0;
 277
 278         tracking_lock->lock("PlaybackEngine::get_tracking_position");
 279
 280
 281 // Adjust for elapsed time since last update_tracking.
 282 // But tracking timer isn't accurate until the first update_tracking
 283 // so wait.
 284         if(tracking_active == 2)
 285         {
 286 //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));
 287
 288
 289 // Don't interpolate when every frame is played.
 290                 if(command->get_edl()->session->video_every_frame &&
 291                         render_engine &&
 292                         render_engine->do_video)
 293                 {
 294                         result = tracking_position;
 295                 }
 296                 else
 297 // Interpolate
 298                 {
 299                         double loop_start, loop_end;
 300                         int play_loop = command->loop_play ? 1 : 0;
 301                         EDL *edl = command->get_edl();
 302                         int loop_playback = edl->local_session->loop_playback ? 1 : 0;
 303                         if( play_loop || !loop_playback ) {
 304                                 loop_start = command->start_position;
 305                                 loop_end = command->end_position;
 306                         }
 307                         else {
 308                                 loop_start = edl->local_session->loop_start;
 309                                 loop_end = edl->local_session->loop_end;
 310                                 play_loop = 1;
 311                         }
 312                         double loop_size = loop_end - loop_start;
 313
 314                         if( command->get_direction() == PLAY_FORWARD ) {
 315 // Interpolate
 316                                 result = tracking_position +
 317                                         command->get_speed() *
 318                                         tracking_timer.get_difference() /
 319                                         1000.0;
 320
 321 // Compensate for loop
 322 //printf("PlaybackEngine::get_tracking_position 1 %d\n", command->get_edl()->local_session->loop_playback);
 323                                 if( play_loop && loop_size > 0 ) {
 324                                         while( result > loop_end ) result -= loop_size;
 325                                 }
 326                         }
 327                         else {
 328 // Interpolate
 329                                 result = tracking_position -
 330                                         command->get_speed() *
 331                                         tracking_timer.get_difference() /
 332                                         1000.0;
 333
 334 // Compensate for loop
 335                                 if( play_loop && loop_size > 0 ) {
 336                                         while( result < loop_start ) result += loop_size;
 337                                 }
 338                         }
 339
 340                 }
 341         }
 342         else
 343                 result = tracking_position;
 344
 345         tracking_lock->unlock();
 346 //printf("PlaybackEngine::get_tracking_position %f %f %d\n", result, tracking_position, tracking_active);
 347
 348 // Adjust for loop
 349
 350         return result;
 351 }
 352
 353 void PlaybackEngine::update_transport(int command, int paused)
 354 {
 355 //      mwindow->gui->lock_window();
 356 //      mwindow->gui->mbuttons->transport->update_gui_state(command, paused);
 357 //      mwindow->gui->unlock_window();
 358 }
 359
 360 void PlaybackEngine::run()
 361 {
 362         start_lock->unlock();
 363
 364         while( !done ) {
 365 // Wait for current command to finish
 366                 output_lock->lock("PlaybackEngine::run");
 367 //printf("PlaybackEngine::run 0 %d\n", curr_command->command);
 368                 if( curr_command->command < 0 ) continue;
 369 // this covers a glitch that occurs when stop is asserted
 370 // when the render_engine starting, but not initialized
 371                 if( curr_command->command == STOP && render_engine )
 372                         render_engine->interrupt_playback();
 373                 wait_render_engine();
 374
 375 // Read the new command
 376                 input_lock->lock("PlaybackEngine::run");
 377                 command->copy_from(curr_command);
 378                 curr_command->command = -1;
 379                 input_lock->unlock();
 380                 if( done ) break;
 381 //printf("PlaybackEngine::run 1 %d\n", command->command);
 382
 383                 switch( command->command ) {
 384 // Parameter change only
 385                 case COMMAND_NONE:
 386                         perform_change();
 387                         break;
 388
 389                 case PAUSE:
 390                         init_cursor(0);
 391                         pause_lock->lock("PlaybackEngine::run");
 392                         stop_cursor();
 393                         break;
 394
 395                 case STOP:
 396 // No changing
 397                         break;
 398
 399                 case CURRENT_FRAME:
 400                 case LAST_FRAME:
 401                         perform_change();
 402                         arm_render_engine();
 403 // Dispatch the command
 404                         start_render_engine();
 405                         break;
 406
 407                 case SINGLE_FRAME_FWD:
 408                 case SINGLE_FRAME_REWIND:
 409 // fall through
 410                 default:
 411                         is_playing_back = 1;
 412                         perform_change();
 413                         arm_render_engine();
 414
 415 // Start tracking after arming so the tracking position doesn't change.
 416 // The tracking for a single frame command occurs during PAUSE
 417                         init_tracking();
 418
 419 // Dispatch the command
 420                         start_render_engine();
 421                         break;
 422                 }
 423 //printf("PlaybackEngine::run 100\n");
 424         }
 425 }
 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->wait_done();
 434         renderengine_lock->unlock();
 435 }
 436
 437
 438 void PlaybackEngine::send_command(int command, EDL *edl, int wait_tracking, int use_inout)
 439 {
 440 //printf("PlaybackEngine::send_command 1 %d\n", command);
 441 // Stop requires transferring the output buffer to a refresh buffer.
 442         int do_stop = 0, do_resume = 0;
 443         int curr_command = this->command->command;
 444         int curr_single_frame = TransportCommand::single_frame(curr_command);
 445         int curr_audio = this->command->toggle_audio ?
 446                 !curr_single_frame : curr_single_frame;
 447         int single_frame = TransportCommand::single_frame(command);
 448         int next_audio = next_command->toggle_audio ? !single_frame : single_frame;
 449
 450 // Dispatch command
 451         switch( command ) {
 452         case FAST_REWIND:       // Commands that play back
 453         case NORMAL_REWIND:
 454         case SLOW_REWIND:
 455         case SINGLE_FRAME_REWIND:
 456         case SINGLE_FRAME_FWD:
 457         case SLOW_FWD:
 458         case NORMAL_FWD:
 459         case FAST_FWD:
 460         case CURRENT_FRAME:
 461         case LAST_FRAME:
 462                 if( curr_command == command && !next_command->speed &&
 463                     !curr_single_frame && curr_audio == next_audio ) {
 464 // Same direction pressed twice, not shuttle, and no change in audio state,  Stop
 465                         do_stop = 1;
 466                         break;
 467                 }
 468 // Resume or change direction
 469                 switch( curr_command ) {
 470                 default:
 471                         transport_stop(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(wait_tracking);
 498         }
 499 }
 500
 501 int PlaybackEngine::transport_stop(int wait_tracking)
 502 {
 503         input_lock->lock("PlaybackEngine::transport_stop 1");
 504         curr_command->copy_from(stop_command);
 505         interrupt_playback(wait_tracking);
 506 //printf("send: %d (STOP)\n", STOP);
 507         input_lock->unlock();
 508         output_lock->unlock();
 509         return 0;
 510 }
 511
 512 int PlaybackEngine::transport_command(int command, int change_type, EDL *new_edl, int use_inout)
 513 {
 514         input_lock->lock("PlaybackEngine::transport_command 1");
 515         next_command->command = command;
 516         next_command->change_type |= change_type;
 517         if( new_edl ) {
 518 // Just change the EDL if the change requires it because renderengine
 519 // structures won't point to the new EDL otherwise and because copying the
 520 // EDL for every cursor movement is slow.
 521                 switch( change_type ) {
 522                 case CHANGE_EDL:
 523                 case CHANGE_ALL:
 524                         next_command->get_edl()->copy_all(new_edl);
 525                         break;
 526                 case CHANGE_PARAMS:
 527                         next_command->get_edl()->synchronize_params(new_edl);
 528                         break;
 529                 }
 530                 next_command->set_playback_range(new_edl, use_inout,
 531                                 preferences->forward_render_displacement);
 532         }
 533         curr_command->copy_from(next_command);
 534         next_command->reset();
 535 //static const char *types[] = { "NONE",
 536 // "FRAME_FWD", "NORMAL_FWD", "FAST_FWD", "FRAME_REV", "NORMAL_REV", "FAST_REV",
 537 // "STOP",  "PAUSE", "SLOW_FWD", "SLOW_REV", "REWIND", "GOTO_END", "CURRENT_FRAME",
 538 // "LAST_FRAME" };
 539 //printf("send= %d (%s)\n", command, types[command]);
 540         input_lock->unlock();
 541         output_lock->unlock();
 542         return 0;
 543 }
 544
 545 void PlaybackEngine::refresh_frame(int change_type, EDL *edl, int dir)
 546 {
 547         int command = dir >= 0 ? CURRENT_FRAME : LAST_FRAME;
 548         next_command->realtime = 1;
 549         transport_command(command, change_type, edl);
 550 }
 551