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         if( render_engine ) {
 134                 render_engine->interrupt_playback();
 135                 render_engine->wait_done();
 136                 delete render_engine;  render_engine = 0;
 137         }
 138         renderengine_lock->unlock();
 139 }
 140
 141 void PlaybackEngine::arm_render_engine()
 142 {
 143         if( render_engine )
 144                 render_engine->arm_command(command);
 145 }
 146
 147 void PlaybackEngine::start_render_engine()
 148 {
 149         if( render_engine )
 150                 render_engine->start_command();
 151 }
 152
 153 void PlaybackEngine::wait_render_engine()
 154 {
 155         if( command->realtime && render_engine ) {
 156                 render_engine->join();
 157         }
 158 }
 159
 160 void PlaybackEngine::create_cache()
 161 {
 162         if(audio_cache) { delete audio_cache;  audio_cache = 0; }
 163         if(video_cache) { delete video_cache;  video_cache = 0; }
 164         if(!audio_cache) audio_cache = new CICache(preferences);
 165         if(!video_cache) video_cache = new CICache(preferences);
 166 }
 167
 168
 169 void PlaybackEngine::perform_change()
 170 {
 171         switch( command->change_type ) {
 172                 case CHANGE_ALL:
 173                         create_cache();
 174                 case CHANGE_EDL:
 175                         create_render_engine();
 176                         break;
 177                 case CHANGE_PARAMS:
 178                         render_engine->get_edl()->synchronize_params(command->get_edl());
 179                 case CHANGE_NONE:
 180                         break;
 181         }
 182 }
 183
 184 void PlaybackEngine::sync_parameters(EDL *edl)
 185 {
 186 // TODO: lock out render engine from keyframe deletions
 187         command->get_edl()->synchronize_params(edl);
 188         if( render_engine )
 189                 render_engine->get_edl()->synchronize_params(edl);
 190 }
 191
 192 void PlaybackEngine::interrupt_playback(int wait_tracking)
 193 {
 194         renderengine_lock->lock("PlaybackEngine::interrupt_playback");
 195         if( render_engine )
 196                 render_engine->interrupt_playback();
 197         renderengine_lock->unlock();
 198
 199 // Stop pausing
 200         pause_lock->unlock();
 201
 202 // Wait for tracking to finish if it is running
 203         if( wait_tracking ) {
 204                 tracking_done->lock("PlaybackEngine::interrupt_playback");
 205                 tracking_done->unlock();
 206         }
 207 }
 208
 209 // Return 1 if levels exist
 210 int PlaybackEngine::get_output_levels(double *levels, long position)
 211 {
 212         int result = 0;
 213         if( render_engine && render_engine->do_audio ) {
 214                 render_engine->get_output_levels(levels, position);
 215                 result = 1;
 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                 render_engine->get_module_levels(module_levels, position);
 226                 result = 1;
 227         }
 228         return result;
 229 }
 230
 231 int PlaybackEngine::brender_available(long position)
 232 {
 233         return 0;
 234 }
 235
 236 void PlaybackEngine::init_cursor(int active)
 237 {
 238 }
 239
 240 void PlaybackEngine::init_meters()
 241 {
 242 }
 243
 244 void PlaybackEngine::stop_cursor()
 245 {
 246 }
 247
 248
 249 void PlaybackEngine::init_tracking()
 250 {
 251         tracking_active = !command->single_frame() ? 1 : 0;
 252         tracking_position = command->playbackstart;
 253         tracking_done->lock("PlaybackEngine::init_tracking");
 254         init_cursor(tracking_active);
 255         init_meters();
 256 }
 257
 258 void PlaybackEngine::stop_tracking()
 259 {
 260         tracking_active = 0;
 261         stop_cursor();
 262         tracking_done->unlock();
 263 }
 264
 265 void PlaybackEngine::update_tracking(double position)
 266 {
 267         tracking_lock->lock("PlaybackEngine::update_tracking");
 268         tracking_position = position;
 269 // Signal that the timer is accurate.
 270         if(tracking_active) tracking_active = 2;
 271         tracking_timer.update();
 272         tracking_lock->unlock();
 273 }
 274
 275 double PlaybackEngine::get_tracking_position()
 276 {
 277         double result = 0;
 278
 279         tracking_lock->lock("PlaybackEngine::get_tracking_position");
 280
 281
 282 // Adjust for elapsed time since last update_tracking.
 283 // But tracking timer isn't accurate until the first update_tracking
 284 // so wait.
 285         if(tracking_active == 2)
 286         {
 287 //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));
 288
 289
 290 // Don't interpolate when every frame is played.
 291                 if( command->get_edl()->session->video_every_frame &&
 292                     render_engine && render_engine->do_video ) {
 293                         result = tracking_position;
 294                 }
 295                 else
 296 // Interpolate
 297                 {
 298                         double loop_start, loop_end;
 299                         int play_loop = command->loop_play ? 1 : 0;
 300                         EDL *edl = command->get_edl();
 301                         int loop_playback = edl->local_session->loop_playback ? 1 : 0;
 302                         if( play_loop || !loop_playback ) {
 303                                 loop_start = command->start_position;
 304                                 loop_end = command->end_position;
 305                         }
 306                         else {
 307                                 loop_start = edl->local_session->loop_start;
 308                                 loop_end = edl->local_session->loop_end;
 309                                 play_loop = 1;
 310                         }
 311                         double loop_size = loop_end - loop_start;
 312
 313                         if( command->get_direction() == PLAY_FORWARD ) {
 314 // Interpolate
 315                                 result = tracking_position +
 316                                         command->get_speed() *
 317                                         tracking_timer.get_difference() /
 318                                         1000.0;
 319
 320 // Compensate for loop
 321 //printf("PlaybackEngine::get_tracking_position 1 %d\n", command->get_edl()->local_session->loop_playback);
 322                                 if( play_loop && loop_size > 0 ) {
 323                                         while( result > loop_end ) result -= loop_size;
 324                                 }
 325                         }
 326                         else {
 327 // Interpolate
 328                                 result = tracking_position -
 329                                         command->get_speed() *
 330                                         tracking_timer.get_difference() /
 331                                         1000.0;
 332
 333 // Compensate for loop
 334                                 if( play_loop && loop_size > 0 ) {
 335                                         while( result < loop_start ) result += loop_size;
 336                                 }
 337                         }
 338
 339                 }
 340         }
 341         else
 342                 result = tracking_position;
 343
 344         tracking_lock->unlock();
 345 //printf("PlaybackEngine::get_tracking_position %f %f %d\n", result, tracking_position, tracking_active);
 346
 347 // Adjust for loop
 348
 349         return result;
 350 }
 351
 352 void PlaybackEngine::update_transport(int command, int paused)
 353 {
 354 //      mwindow->gui->lock_window();
 355 //      mwindow->gui->mbuttons->transport->update_gui_state(command, paused);
 356 //      mwindow->gui->unlock_window();
 357 }
 358
 359 void PlaybackEngine::run()
 360 {
 361         start_lock->unlock();
 362
 363         while( !done ) {
 364 // Wait for current command to finish
 365                 output_lock->lock("PlaybackEngine::run");
 366                 if( done ) break;
 367 // Read the new command
 368                 input_lock->lock("PlaybackEngine::run");
 369                 command->copy_from(sent_command);
 370 //printf("sent command=%d\n", sent_command->command);
 371                 int active = this->send_active;
 372                 this->send_active = 0;
 373                 input_lock->unlock();
 374                 if( !active ) continue;
 375
 376                 interrupt_playback(0);
 377                 wait_render_engine();
 378
 379                 switch( command->command ) {
 380 // Parameter change only
 381                 case COMMAND_NONE:
 382                         perform_change();
 383                         break;
 384
 385                 case PAUSE:
 386                         init_cursor(0);
 387                         pause_lock->lock("PlaybackEngine::run");
 388                         stop_cursor();
 389                         break;
 390
 391                 case STOP:
 392 // No changing
 393                         break;
 394
 395                 case CURRENT_FRAME:
 396                 case LAST_FRAME:
 397                         perform_change();
 398                         arm_render_engine();
 399 // Dispatch the command
 400                         start_render_engine();
 401                         break;
 402
 403                 case SINGLE_FRAME_FWD:
 404                 case SINGLE_FRAME_REWIND:
 405 // fall through
 406                 default:
 407                         is_playing_back = 1;
 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                         if( !command->single_frame() )
 415                                 clear_output();
 416 // Dispatch the command
 417                         start_render_engine();
 418                         break;
 419                 }
 420 //printf("PlaybackEngine::run 100\n");
 421         }
 422 }
 423
 424 void PlaybackEngine::clear_output()
 425 {
 426         BC_WindowBase *cwdw = output->get_canvas();
 427         if( !cwdw ) return;
 428         cwdw->lock_window("PlaybackEngine::clear_output");
 429         output->clear();
 430         cwdw->unlock_window();
 431 }
 432
 433 void PlaybackEngine::stop_playback(int wait_tracking)
 434 {
 435         transport_stop(wait_tracking);
 436         renderengine_lock->lock("PlaybackEngine::stop_playback");
 437         if( render_engine ) {
 438                 render_engine->interrupt_playback();
 439                 render_engine->wait_done();
 440         }
 441         renderengine_lock->unlock();
 442 }
 443
 444
 445 void PlaybackEngine::send_command(int command, EDL *edl, int wait_tracking, int use_inout)
 446 {
 447 //printf("PlaybackEngine::send_command 1 %d\n", command);
 448 // Stop requires transferring the output buffer to a refresh buffer.
 449         int do_stop = 0;
 450         int curr_command = is_playing_back ? this->command->command : STOP;
 451         int curr_single_frame = TransportCommand::single_frame(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 next_audio = next_command->toggle_audio ? !single_frame : single_frame;
 456         float next_speed = next_command->speed;
 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 // run shuttle as no prev command
 471                 if( next_speed ) curr_command = COMMAND_NONE;
 472 // Same direction pressed twice, not shuttle, and no change in audio state,  Stop
 473                 if( curr_command == command && !curr_single_frame &&
 474                     curr_audio == next_audio ) { do_stop = 1;  break; }
 475
 476 // Resume or change direction
 477                 switch( curr_command ) {
 478                 default:
 479                         transport_stop(0);
 480                         next_command->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 // Start from scratch
 490                         transport_command(command, CHANGE_NONE, edl, use_inout);
 491                         break;
 492                 }
 493                 break;
 494
 495 // Commands that stop
 496         case STOP:
 497         case REWIND:
 498         case GOTO_END:
 499                 do_stop = 1;
 500                 break;
 501         }
 502
 503         if( do_stop ) {
 504                 transport_stop(wait_tracking);
 505         }
 506 }
 507
 508 int PlaybackEngine::put_command(TransportCommand *command, int reset)
 509 {
 510         input_lock->lock("PlaybackEngine::put_command");
 511         int prev_change_type = sent_command->change_type;
 512         sent_command->copy_from(command);
 513 // run only last command, sum change type
 514         if( send_active )
 515                 sent_command->change_type |= prev_change_type;
 516         send_active = 1;
 517         if( reset ) command->reset();
 518         output_lock->unlock();
 519         input_lock->unlock();
 520         return 0;
 521 }
 522
 523 int PlaybackEngine::transport_stop(int wait_tracking)
 524 {
 525         put_command(stop_command, 0);
 526         if( wait_tracking ) {
 527                 tracking_done->lock("PlaybackEngine::transport_stop");
 528                 tracking_done->unlock();
 529         }
 530 //printf("send: %d (STOP) 0\n", STOP);
 531         return 0;
 532 }
 533
 534 int PlaybackEngine::transport_command(int command, int change_type, EDL *new_edl, int use_inout)
 535 {
 536         next_command->command = command;
 537         next_command->change_type |= change_type;
 538         if( new_edl ) {
 539 // Just change the EDL if the change requires it because renderengine
 540 // structures won't point to the new EDL otherwise and because copying the
 541 // EDL for every cursor movement is slow.
 542                 if( change_type & CHANGE_EDL )
 543                         next_command->get_edl()->copy_all(new_edl);
 544                 else if( change_type & CHANGE_PARAMS )
 545                         next_command->get_edl()->synchronize_params(new_edl);
 546                 next_command->set_playback_range(new_edl, use_inout,
 547                                 preferences->forward_render_displacement);
 548         }
 549         put_command(next_command, 1);
 550 //static const char *types[] = { "NONE",
 551 // "FRAME_FWD", "NORMAL_FWD", "FAST_FWD", "FRAME_REV", "NORMAL_REV", "FAST_REV",
 552 // "STOP",  "PAUSE", "SLOW_FWD", "SLOW_REV", "REWIND", "GOTO_END", "CURRENT_FRAME",
 553 // "LAST_FRAME" };
 554 //printf("send= %d (%s) %d\n", sent_command->command,
 555 // types[sent_command->command], sent_command->locked);
 556         return 0;
 557 }
 558
 559 void PlaybackEngine::refresh_frame(int change_type, EDL *edl, int dir)
 560 {
 561         int command = dir >= 0 ? CURRENT_FRAME : LAST_FRAME;
 562         next_command->realtime = 1;
 563         transport_command(command, change_type, edl);
 564 }
 565