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         last_command = STOP;
  56         tracking_lock = new Mutex("PlaybackEngine::tracking_lock");
  57         renderengine_lock = new Mutex("PlaybackEngine::renderengine_lock");
  58         tracking_done = new Condition(1, "PlaybackEngine::tracking_done");
  59         pause_lock = new Condition(0, "PlaybackEngine::pause_lock");
  60         start_lock = new Condition(0, "PlaybackEngine::start_lock");
  61         render_engine = 0;
  62         debug = 0;
  63 }
  64
  65 PlaybackEngine::~PlaybackEngine()
  66 {
  67         done = 1;
  68         que->send_command(STOP,
  69                 CHANGE_NONE,
  70                 0,
  71                 0);
  72         interrupt_playback();
  73
  74         Thread::join();
  75         delete preferences;
  76         delete command;
  77         delete que;
  78         delete_render_engine();
  79         delete audio_cache;
  80         delete video_cache;
  81         delete tracking_lock;
  82         delete tracking_done;
  83         delete pause_lock;
  84         delete start_lock;
  85         delete renderengine_lock;
  86 }
  87
  88 void PlaybackEngine::create_objects()
  89 {
  90         preferences = new Preferences;
  91         command = new TransportCommand;
  92         que = new TransportQue;
  93 // Set the first change to maximum
  94         que->command.change_type = CHANGE_ALL;
  95
  96         preferences->copy_from(mwindow->preferences);
  97
  98         done = 0;
  99         Thread::start();
 100         start_lock->lock("PlaybackEngine::create_objects");
 101 }
 102
 103 ChannelDB* PlaybackEngine::get_channeldb()
 104 {
 105         PlaybackConfig *config = command->get_edl()->session->playback_config;
 106         switch(config->vconfig->driver)
 107         {
 108                 case VIDEO4LINUX2JPEG:
 109                         return mwindow->channeldb_v4l2jpeg;
 110         }
 111         return 0;
 112 }
 113
 114 int PlaybackEngine::create_render_engine()
 115 {
 116 // Fix playback configurations
 117         delete_render_engine();
 118         render_engine = new RenderEngine(this, preferences, output, 0);
 119 //printf("PlaybackEngine::create_render_engine %d\n", __LINE__);
 120         return 0;
 121 }
 122
 123 void PlaybackEngine::delete_render_engine()
 124 {
 125         renderengine_lock->lock("PlaybackEngine::delete_render_engine");
 126         delete render_engine;
 127         render_engine = 0;
 128         renderengine_lock->unlock();
 129 }
 130
 131 void PlaybackEngine::arm_render_engine()
 132 {
 133         if(render_engine)
 134                 render_engine->arm_command(command);
 135 }
 136
 137 void PlaybackEngine::start_render_engine()
 138 {
 139         if(render_engine) render_engine->start_command();
 140 }
 141
 142 void PlaybackEngine::wait_render_engine()
 143 {
 144         if(command->realtime && render_engine)
 145         {
 146                 render_engine->join();
 147         }
 148 }
 149
 150 void PlaybackEngine::create_cache()
 151 {
 152         if(audio_cache) { delete audio_cache;  audio_cache = 0; }
 153         if(video_cache) { delete video_cache;  video_cache = 0; }
 154         if(!audio_cache) audio_cache = new CICache(preferences);
 155         if(!video_cache) video_cache = new CICache(preferences);
 156 }
 157
 158
 159 void PlaybackEngine::perform_change()
 160 {
 161         switch(command->change_type)
 162         {
 163                 case CHANGE_ALL:
 164                         create_cache();
 165                 case CHANGE_EDL:
 166                         create_render_engine();
 167                 case CHANGE_PARAMS:
 168                         if(command->change_type != CHANGE_EDL &&
 169                                 (uint32_t)command->change_type != CHANGE_ALL)
 170                                 render_engine->get_edl()->synchronize_params(command->get_edl());
 171                 case CHANGE_NONE:
 172                         break;
 173         }
 174 }
 175
 176 void PlaybackEngine::sync_parameters(EDL *edl)
 177 {
 178 // TODO: lock out render engine from keyframe deletions
 179         command->get_edl()->synchronize_params(edl);
 180         if(render_engine) render_engine->get_edl()->synchronize_params(edl);
 181 }
 182
 183
 184 void PlaybackEngine::interrupt_playback(int wait_tracking)
 185 {
 186         renderengine_lock->lock("PlaybackEngine::interrupt_playback");
 187         if(render_engine)
 188                 render_engine->interrupt_playback();
 189         renderengine_lock->unlock();
 190
 191 // Stop pausing
 192         pause_lock->unlock();
 193
 194 // Wait for tracking to finish if it is running
 195         if(wait_tracking)
 196         {
 197                 tracking_done->lock("PlaybackEngine::interrupt_playback");
 198                 tracking_done->unlock();
 199         }
 200 }
 201
 202
 203 // Return 1 if levels exist
 204 int PlaybackEngine::get_output_levels(double *levels, long position)
 205 {
 206         int result = 0;
 207         if(render_engine && render_engine->do_audio)
 208         {
 209                 result = 1;
 210                 render_engine->get_output_levels(levels, position);
 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         {
 221                 result = 1;
 222                 render_engine->get_module_levels(module_levels, position);
 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 &&
 289                         render_engine->do_video)
 290                 {
 291                         result = tracking_position;
 292                 }
 293                 else
 294 // Interpolate
 295                 {
 296                         double loop_start, loop_end;
 297                         int play_loop = command->play_loop ? 1 : 0;
 298                         EDL *edl = command->get_edl();
 299                         int loop_playback = edl->local_session->loop_playback ? 1 : 0;
 300                         if( play_loop || !loop_playback ) {
 301                                 loop_start = command->start_position;
 302                                 loop_end = command->end_position;
 303                         }
 304                         else {
 305                                 loop_start = edl->local_session->loop_start;
 306                                 loop_end = edl->local_session->loop_end;
 307                                 play_loop = 1;
 308                         }
 309                         double loop_size = loop_end - loop_start;
 310
 311                         if( command->get_direction() == PLAY_FORWARD ) {
 312 // Interpolate
 313                                 result = tracking_position +
 314                                         command->get_speed() *
 315                                         tracking_timer.get_difference() /
 316                                         1000.0;
 317
 318 // Compensate for loop
 319 //printf("PlaybackEngine::get_tracking_position 1 %d\n", command->get_edl()->local_session->loop_playback);
 320                                 if( play_loop && loop_size > 0 ) {
 321                                         while( result > loop_end ) result -= loop_size;
 322                                 }
 323                         }
 324                         else {
 325 // Interpolate
 326                                 result = tracking_position -
 327                                         command->get_speed() *
 328                                         tracking_timer.get_difference() /
 329                                         1000.0;
 330
 331 // Compensate for loop
 332                                 if( play_loop && loop_size > 0 ) {
 333                                         while( result < loop_start ) result += loop_size;
 334                                 }
 335                         }
 336
 337                 }
 338         }
 339         else
 340                 result = tracking_position;
 341
 342         tracking_lock->unlock();
 343 //printf("PlaybackEngine::get_tracking_position %f %f %d\n", result, tracking_position, tracking_active);
 344
 345 // Adjust for loop
 346
 347         return result;
 348 }
 349
 350 void PlaybackEngine::update_transport(int command, int paused)
 351 {
 352 //      mwindow->gui->lock_window();
 353 //      mwindow->gui->mbuttons->transport->update_gui_state(command, paused);
 354 //      mwindow->gui->unlock_window();
 355 }
 356
 357 void PlaybackEngine::run()
 358 {
 359         start_lock->unlock();
 360
 361         while( !done ) {
 362 // Wait for current command to finish
 363                 que->output_lock->lock("PlaybackEngine::run");
 364                 wait_render_engine();
 365
 366 // Read the new command
 367                 que->input_lock->lock("PlaybackEngine::run");
 368                 if(done) return;
 369
 370                 command->copy_from(&que->command);
 371                 que->command.reset();
 372                 que->input_lock->unlock();
 373 //printf("PlaybackEngine::run 1 %d\n", command->command);
 374
 375                 switch( command->command ) {
 376 // Parameter change only
 377                 case COMMAND_NONE:
 378 //                      command->command = last_command;
 379                         perform_change();
 380                         break;
 381
 382                 case PAUSE:
 383                         init_cursor(0);
 384                         pause_lock->lock("PlaybackEngine::run");
 385                         stop_cursor();
 386                         break;
 387
 388                 case STOP:
 389 // No changing
 390                         break;
 391
 392                 case CURRENT_FRAME:
 393                 case LAST_FRAME:
 394                         last_command = command->command;
 395                         perform_change();
 396                         arm_render_engine();
 397 // Dispatch the command
 398                         start_render_engine();
 399                         break;
 400
 401                 case SINGLE_FRAME_FWD:
 402                 case SINGLE_FRAME_REWIND:
 403 // fall through
 404                 default:
 405                         last_command = command->command;
 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         que->send_command(STOP, CHANGE_NONE, 0, 0);
 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::issue_command(EDL *edl, int command, int wait_tracking,
 438                 int use_inout, int update_refresh, int toggle_audio, int loop_play)
 439 {
 440 //printf("PlaybackEngine::issue_command 1 %d\n", command);
 441 // Stop requires transferring the output buffer to a refresh buffer.
 442         int do_stop = 0, resume = 0;
 443         int prev_command = this->command->command;
 444         int prev_single_frame = this->command->single_frame();
 445         int prev_audio = this->command->audio_toggle ?
 446                  !prev_single_frame : prev_single_frame;
 447         int cur_single_frame = TransportCommand::single_frame(command);
 448         int cur_audio = toggle_audio ?
 449                  !cur_single_frame : cur_single_frame;
 450
 451 // Dispatch command
 452         switch(command) {
 453         case FAST_REWIND:       // Commands that play back
 454         case NORMAL_REWIND:
 455         case SLOW_REWIND:
 456         case SINGLE_FRAME_REWIND:
 457         case SINGLE_FRAME_FWD:
 458         case SLOW_FWD:
 459         case NORMAL_FWD:
 460         case FAST_FWD:
 461         case CURRENT_FRAME:
 462         case LAST_FRAME:
 463                 if( !prev_single_frame &&
 464                     prev_command == command &&
 465                     cur_audio == prev_audio ) {
 466 // Same direction pressed twice and no change in audio state,  Stop
 467                         do_stop = 1;
 468                         break;
 469                 }
 470 // Resume or change direction
 471                 switch( prev_command ) {
 472                 default:
 473                         que->send_command(STOP, CHANGE_NONE, 0, 0);
 474                         interrupt_playback(wait_tracking);
 475                         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 // Start from scratch
 484                         que->send_command(command, CHANGE_NONE, edl,
 485                                 1, resume, use_inout, toggle_audio, loop_play,
 486                                 mwindow->preferences->forward_render_displacement);
 487                         break;
 488                 }
 489                 break;
 490
 491 // Commands that stop
 492         case STOP:
 493         case REWIND:
 494         case GOTO_END:
 495                 do_stop = 1;
 496                 break;
 497         }
 498
 499         if( do_stop ) {
 500                 que->send_command(STOP, CHANGE_NONE, 0, 0);
 501                 interrupt_playback(wait_tracking);
 502         }
 503 }
 504
 505 void PlaybackEngine::refresh_frame(int change_type, EDL *edl, int dir)
 506 {
 507         que->send_command(dir >= 0 ? CURRENT_FRAME : LAST_FRAME,
 508                 change_type, edl, 1);
 509 }
 510