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         send_active = 0;
  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 input_lock;
  96         delete output_lock;
  97 }
  98
  99 void PlaybackEngine::create_objects()
 100 {
 101         preferences = new Preferences;
 102         preferences->copy_from(mwindow->preferences);
 103
 104         done = 0;
 105         Thread::start();
 106         start_lock->lock("PlaybackEngine::create_objects");
 107 }
 108
 109 ChannelDB* PlaybackEngine::get_channeldb()
 110 {
 111         PlaybackConfig *config = command->get_edl()->session->playback_config;
 112         switch(config->vconfig->driver)
 113         {
 114                 case VIDEO4LINUX2JPEG:
 115                         return mwindow->channeldb_v4l2jpeg;
 116         }
 117         return 0;
 118 }
 119
 120 int PlaybackEngine::create_render_engine()
 121 {
 122 // Fix playback configurations
 123         delete_render_engine();
 124         render_engine = new RenderEngine(this, preferences, output, 0);
 125 //printf("PlaybackEngine::create_render_engine %d\n", __LINE__);
 126         return 0;
 127 }
 128
 129 void PlaybackEngine::delete_render_engine()
 130 {
 131         renderengine_lock->lock("PlaybackEngine::delete_render_engine");
 132         delete render_engine;  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 )
 145                 render_engine->start_command();
 146 }
 147
 148 void PlaybackEngine::wait_render_engine()
 149 {
 150         if( command->realtime && render_engine ) {
 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                 case CHANGE_ALL:
 168                         create_cache();
 169                 case CHANGE_EDL:
 170                         create_render_engine();
 171                         break;
 172                 case CHANGE_PARAMS:
 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 )
 184                 render_engine->get_edl()->synchronize_params(edl);
 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                 tracking_done->lock("PlaybackEngine::interrupt_playback");
 200                 tracking_done->unlock();
 201         }
 202 }
 203
 204 // Return 1 if levels exist
 205 int PlaybackEngine::get_output_levels(double *levels, long position)
 206 {
 207         int result = 0;
 208         if( render_engine && render_engine->do_audio ) {
 209                 render_engine->get_output_levels(levels, position);
 210                 result = 1;
 211         }
 212         return result;
 213 }
 214
 215
 216 int PlaybackEngine::get_module_levels(ArrayList<double> *module_levels, long position)
 217 {
 218         int result = 0;
 219         if( render_engine && render_engine->do_audio ) {
 220                 render_engine->get_module_levels(module_levels, position);
 221                 result = 1;
 222         }
 223         return result;
 224 }
 225
 226 int PlaybackEngine::brender_available(long position)
 227 {
 228         return 0;
 229 }
 230
 231 void PlaybackEngine::init_cursor(int active)
 232 {
 233 }
 234
 235 void PlaybackEngine::init_meters()
 236 {
 237 }
 238
 239 void PlaybackEngine::stop_cursor()
 240 {
 241 }
 242
 243
 244 void PlaybackEngine::init_tracking()
 245 {
 246         tracking_active = !command->single_frame() ? 1 : 0;
 247         tracking_position = command->playbackstart;
 248         tracking_done->lock("PlaybackEngine::init_tracking");
 249         init_cursor(tracking_active);
 250         init_meters();
 251 }
 252
 253 void PlaybackEngine::stop_tracking()
 254 {
 255         tracking_active = 0;
 256         stop_cursor();
 257         tracking_done->unlock();
 258 }
 259
 260 void PlaybackEngine::update_tracking(double position)
 261 {
 262         tracking_lock->lock("PlaybackEngine::update_tracking");
 263         tracking_position = position;
 264 // Signal that the timer is accurate.
 265         if(tracking_active) tracking_active = 2;
 266         tracking_timer.update();
 267         tracking_lock->unlock();
 268 }
 269
 270 double PlaybackEngine::get_tracking_position()
 271 {
 272         double result = 0;
 273
 274         tracking_lock->lock("PlaybackEngine::get_tracking_position");
 275
 276
 277 // Adjust for elapsed time since last update_tracking.
 278 // But tracking timer isn't accurate until the first update_tracking
 279 // so wait.
 280         if(tracking_active == 2)
 281         {
 282 //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));
 283
 284
 285 // Don't interpolate when every frame is played.
 286                 if( command->get_edl()->session->video_every_frame &&
 287                     render_engine && render_engine->do_video ) {
 288                         result = tracking_position;
 289                 }
 290                 else
 291 // Interpolate
 292                 {
 293                         double loop_start, loop_end;
 294                         int play_loop = command->loop_play ? 1 : 0;
 295                         EDL *edl = command->get_edl();
 296                         int loop_playback = edl->local_session->loop_playback ? 1 : 0;
 297                         if( play_loop || !loop_playback ) {
 298                                 loop_start = command->start_position;
 299                                 loop_end = command->end_position;
 300                         }
 301                         else {
 302                                 loop_start = edl->local_session->loop_start;
 303                                 loop_end = edl->local_session->loop_end;
 304                                 play_loop = 1;
 305                         }
 306                         double loop_size = loop_end - loop_start;
 307
 308                         if( command->get_direction() == PLAY_FORWARD ) {
 309 // Interpolate
 310                                 result = tracking_position +
 311                                         command->get_speed() *
 312                                         tracking_timer.get_difference() /
 313                                         1000.0;
 314
 315 // Compensate for loop
 316 //printf("PlaybackEngine::get_tracking_position 1 %d\n", command->get_edl()->local_session->loop_playback);
 317                                 if( play_loop && loop_size > 0 ) {
 318                                         while( result > loop_end ) result -= loop_size;
 319                                 }
 320                         }
 321                         else {
 322 // Interpolate
 323                                 result = tracking_position -
 324                                         command->get_speed() *
 325                                         tracking_timer.get_difference() /
 326                                         1000.0;
 327
 328 // Compensate for loop
 329                                 if( play_loop && loop_size > 0 ) {
 330                                         while( result < loop_start ) result += loop_size;
 331                                 }
 332                         }
 333
 334                 }
 335         }
 336         else
 337                 result = tracking_position;
 338
 339         tracking_lock->unlock();
 340 //printf("PlaybackEngine::get_tracking_position %f %f %d\n", result, tracking_position, tracking_active);
 341
 342 // Adjust for loop
 343
 344         return result;
 345 }
 346
 347 void PlaybackEngine::update_transport(int command, int paused)
 348 {
 349 //      mwindow->gui->lock_window();
 350 //      mwindow->gui->mbuttons->transport->update_gui_state(command, paused);
 351 //      mwindow->gui->unlock_window();
 352 }
 353
 354 void PlaybackEngine::run()
 355 {
 356         start_lock->unlock();
 357
 358         while( !done ) {
 359 // Wait for current command to finish
 360                 output_lock->lock("PlaybackEngine::run");
 361                 if( done ) break;
 362 // Read the new command
 363                 input_lock->lock("PlaybackEngine::run");
 364                 command->copy_from(sent_command);
 365 //printf("sent command=%d\n", sent_command->command);
 366                 int active = this->send_active;
 367                 this->send_active = 0;
 368                 input_lock->unlock();
 369                 if( !active ) continue;
 370
 371                 interrupt_playback(0);
 372                 wait_render_engine();
 373
 374                 switch( command->command ) {
 375 // Parameter change only
 376                 case COMMAND_NONE:
 377                         perform_change();
 378                         break;
 379
 380                 case PAUSE:
 381                         init_cursor(0);
 382                         pause_lock->lock("PlaybackEngine::run");
 383                         stop_cursor();
 384                         break;
 385
 386                 case STOP:
 387 // No changing
 388                         break;
 389
 390                 case CURRENT_FRAME:
 391                 case LAST_FRAME:
 392                         perform_change();
 393                         arm_render_engine();
 394 // Dispatch the command
 395                         start_render_engine();
 396                         break;
 397
 398                 case SINGLE_FRAME_FWD:
 399                 case SINGLE_FRAME_REWIND:
 400 // fall through
 401                 default:
 402                         is_playing_back = 1;
 403                         perform_change();
 404                         arm_render_engine();
 405
 406 // Start tracking after arming so the tracking position doesn't change.
 407 // The tracking for a single frame command occurs during PAUSE
 408                         init_tracking();
 409
 410 // Dispatch the command
 411                         start_render_engine();
 412                         break;
 413                 }
 414 //printf("PlaybackEngine::run 100\n");
 415         }
 416 }
 417
 418
 419 void PlaybackEngine::stop_playback(int wait_tracking)
 420 {
 421         transport_stop(wait_tracking);
 422         renderengine_lock->lock("PlaybackEngine::stop_playback");
 423         if( render_engine ) {
 424                 render_engine->interrupt_playback();
 425                 render_engine->wait_done();
 426         }
 427         renderengine_lock->unlock();
 428 }
 429
 430
 431 void PlaybackEngine::send_command(int command, EDL *edl, int wait_tracking, int use_inout)
 432 {
 433 //printf("PlaybackEngine::send_command 1 %d\n", command);
 434 // Stop requires transferring the output buffer to a refresh buffer.
 435         int do_stop = 0;
 436         int curr_command = this->command->command;
 437         int curr_single_frame = TransportCommand::single_frame(curr_command);
 438         int curr_audio = this->command->toggle_audio ?
 439                 !curr_single_frame : curr_single_frame;
 440         int single_frame = TransportCommand::single_frame(command);
 441         int next_audio = next_command->toggle_audio ? !single_frame : single_frame;
 442         float next_speed = next_command->speed;
 443
 444 // Dispatch command
 445         switch( command ) {
 446         case FAST_REWIND:       // Commands that play back
 447         case NORMAL_REWIND:
 448         case SLOW_REWIND:
 449         case SINGLE_FRAME_REWIND:
 450         case SINGLE_FRAME_FWD:
 451         case SLOW_FWD:
 452         case NORMAL_FWD:
 453         case FAST_FWD:
 454         case CURRENT_FRAME:
 455         case LAST_FRAME:
 456 // run shuttle as no prev command
 457                 if( next_speed ) curr_command = COMMAND_NONE;
 458 // Same direction pressed twice, not shuttle, and no change in audio state,  Stop
 459                 if( curr_command == command && !curr_single_frame &&
 460                     curr_audio == next_audio ) { do_stop = 1;  break; }
 461
 462 // Resume or change direction
 463                 switch( curr_command ) {
 464                 default:
 465                         transport_stop(0);
 466                         next_command->resume = 1;
 467 // fall through
 468                 case STOP:
 469                 case COMMAND_NONE:
 470                 case SINGLE_FRAME_FWD:
 471                 case SINGLE_FRAME_REWIND:
 472                 case CURRENT_FRAME:
 473                 case LAST_FRAME:
 474                         next_command->realtime = 1;
 475 // Start from scratch
 476                         transport_command(command, CHANGE_NONE, edl, use_inout);
 477                         break;
 478                 }
 479                 break;
 480
 481 // Commands that stop
 482         case STOP:
 483         case REWIND:
 484         case GOTO_END:
 485                 do_stop = 1;
 486                 break;
 487         }
 488
 489         if( do_stop ) {
 490                 transport_stop(wait_tracking);
 491         }
 492 }
 493
 494 int PlaybackEngine::put_command(TransportCommand *command, int reset)
 495 {
 496         input_lock->lock("PlaybackEngine::put_command");
 497         int prev_change_type = sent_command->change_type;
 498         sent_command->copy_from(command);
 499 // run only last command, sum change type
 500         if( send_active )
 501                 sent_command->change_type |= prev_change_type;
 502         send_active = 1;
 503         if( reset ) command->reset();
 504         output_lock->unlock();
 505         input_lock->unlock();
 506         return 0;
 507 }
 508
 509 int PlaybackEngine::transport_stop(int wait_tracking)
 510 {
 511         put_command(stop_command, 0);
 512         if( wait_tracking ) {
 513                 tracking_done->lock("PlaybackEngine::transport_stop");
 514                 tracking_done->unlock();
 515         }
 516 //printf("send: %d (STOP) 0\n", STOP);
 517         return 0;
 518 }
 519
 520 int PlaybackEngine::transport_command(int command, int change_type, EDL *new_edl, int use_inout)
 521 {
 522         next_command->command = command;
 523         next_command->change_type |= change_type;
 524         if( new_edl ) {
 525 // Just change the EDL if the change requires it because renderengine
 526 // structures won't point to the new EDL otherwise and because copying the
 527 // EDL for every cursor movement is slow.
 528                 switch( change_type ) {
 529                 case CHANGE_EDL:
 530                 case CHANGE_ALL:
 531                         next_command->get_edl()->copy_all(new_edl);
 532                         break;
 533                 case CHANGE_PARAMS:
 534                         next_command->get_edl()->synchronize_params(new_edl);
 535                         break;
 536                 }
 537                 next_command->set_playback_range(new_edl, use_inout,
 538                                 preferences->forward_render_displacement);
 539         }
 540         put_command(next_command, 1);
 541 //static const char *types[] = { "NONE",
 542 // "FRAME_FWD", "NORMAL_FWD", "FAST_FWD", "FRAME_REV", "NORMAL_REV", "FAST_REV",
 543 // "STOP",  "PAUSE", "SLOW_FWD", "SLOW_REV", "REWIND", "GOTO_END", "CURRENT_FRAME",
 544 // "LAST_FRAME" };
 545 //printf("send= %d (%s) %d\n", sent_command->command,
 546 // types[sent_command->command], sent_command->locked);
 547         return 0;
 548 }
 549
 550 void PlaybackEngine::refresh_frame(int change_type, EDL *edl, int dir)
 551 {
 552         int command = dir >= 0 ? CURRENT_FRAME : LAST_FRAME;
 553         next_command->realtime = 1;
 554         transport_command(command, change_type, edl);
 555 }
 556