hvirtual/cinelerra/playbackengine.C

   1 #include "cache.h"
   2 #include "condition.h"
   3 #include "defaults.h"
   4 #include "edl.h"
   5 #include "edlsession.h"
   6 #include "localsession.h"
   7 #include "mbuttons.h"
   8 #include "mutex.h"
   9 #include "mwindow.h"
  10 #include "mwindowgui.h"
  11 #include "patchbay.h"
  12 #include "tracking.h"
  13 #include "playbackengine.h"
  14 #include "playtransport.h"
  15 #include "preferences.h"
  16 #include "renderengine.h"
  17 #include "mainsession.h"
  18 #include "trackcanvas.h"
  19 #include "transportque.h"
  20 #include "videodevice.h"
  21 #include "vrender.h"
  22
  23
  24 PlaybackEngine::PlaybackEngine(MWindow *mwindow, Canvas *output)
  25  : Thread(1, 0, 0)
  26 {
  27         this->mwindow = mwindow;
  28         this->output = output;
  29         is_playing_back = 0;
  30         tracking_position = 0;
  31         tracking_active = 0;
  32         audio_cache = 0;
  33         video_cache = 0;
  34         last_command = STOP;
  35         tracking_lock = new Mutex("PlaybackEngine::tracking_lock");
  36         tracking_done = new Condition(1, "PlaybackEngine::tracking_done");
  37         pause_lock = new Condition(0, "PlaybackEngine::pause_lock");
  38         start_lock = new Condition(0, "PlaybackEngine::start_lock");
  39         render_engine = 0;
  40         debug = 0;
  41 }
  42
  43 PlaybackEngine::~PlaybackEngine()
  44 {
  45         done = 1;
  46         que->send_command(STOP,
  47                 CHANGE_NONE,
  48                 0,
  49                 0);
  50         interrupt_playback();
  51
  52         Thread::join();
  53         delete preferences;
  54         delete command;
  55         delete que;
  56         delete_render_engine();
  57         delete audio_cache;
  58         delete video_cache;
  59         delete tracking_lock;
  60         delete tracking_done;
  61         delete pause_lock;
  62         delete start_lock;
  63 }
  64
  65 int PlaybackEngine::create_objects()
  66 {
  67         int result = 0;
  68         preferences = new Preferences;
  69         command = new TransportCommand;
  70         que = new TransportQue;
  71 // Set the first change to maximum
  72         que->command.change_type = CHANGE_ALL;
  73
  74         preferences->copy_from(mwindow->preferences);
  75
  76         done = 0;
  77         Thread::start();
  78         start_lock->lock("PlaybackEngine::create_objects");
  79         return result;
  80 }
  81
  82 ChannelDB* PlaybackEngine::get_channeldb()
  83 {
  84         PlaybackConfig *config = command->get_edl()->session->playback_config;
  85         switch(config->vconfig->driver)
  86         {
  87                 case VIDEO4LINUX2JPEG:
  88                         return mwindow->channeldb_v4l2jpeg;
  89                         break;
  90                 case PLAYBACK_BUZ:
  91                         return mwindow->channeldb_buz;
  92                         break;
  93         }
  94         return 0;
  95 }
  96
  97 int PlaybackEngine::create_render_engine()
  98 {
  99 // Fix playback configurations
 100         int current_vchannel = 0;
 101         int current_achannel = 0;
 102
 103         delete_render_engine();
 104
 105
 106         render_engine = new RenderEngine(this,
 107                 preferences,
 108                 command,
 109                 output,
 110                 mwindow->plugindb,
 111                 get_channeldb());
 112         return 0;
 113 }
 114
 115 void PlaybackEngine::delete_render_engine()
 116 {
 117         delete render_engine;
 118         render_engine = 0;
 119 }
 120
 121 void PlaybackEngine::arm_render_engine()
 122 {
 123         int current_achannel = 0, current_vchannel = 0;
 124         if(render_engine)
 125                 render_engine->arm_command(command,
 126                         current_achannel,
 127                         current_vchannel);
 128 }
 129
 130 void PlaybackEngine::start_render_engine()
 131 {
 132         if(render_engine) render_engine->start_command();
 133 }
 134
 135 void PlaybackEngine::wait_render_engine()
 136 {
 137         if(command->realtime && render_engine)
 138         {
 139                 render_engine->join();
 140         }
 141 }
 142
 143 void PlaybackEngine::create_cache()
 144 {
 145         if(audio_cache) delete audio_cache;
 146         audio_cache = 0;
 147         if(video_cache) delete video_cache;
 148         video_cache = 0;
 149         if(!audio_cache)
 150                 audio_cache = new CICache(command->get_edl(), preferences, mwindow->plugindb);
 151         else
 152                 audio_cache->set_edl(command->get_edl());
 153
 154         if(!video_cache)
 155                 video_cache = new CICache(command->get_edl(), preferences, mwindow->plugindb);
 156         else
 157                 video_cache->set_edl(command->get_edl());
 158 }
 159
 160
 161 void PlaybackEngine::perform_change()
 162 {
 163         switch(command->change_type)
 164         {
 165                 case CHANGE_ALL:
 166                         create_cache();
 167                 case CHANGE_EDL:
 168                         audio_cache->set_edl(command->get_edl());
 169                         video_cache->set_edl(command->get_edl());
 170                         create_render_engine();
 171                 case CHANGE_PARAMS:
 172                         if(command->change_type != CHANGE_EDL &&
 173                                 command->change_type != CHANGE_ALL)
 174                                 render_engine->edl->synchronize_params(command->get_edl());
 175                 case CHANGE_NONE:
 176                         break;
 177         }
 178 }
 179
 180 void PlaybackEngine::sync_parameters(EDL *edl)
 181 {
 182 // TODO: lock out render engine from keyframe deletions
 183         command->get_edl()->synchronize_params(edl);
 184         if(render_engine) render_engine->edl->synchronize_params(edl);
 185 }
 186
 187
 188 void PlaybackEngine::interrupt_playback(int wait_tracking)
 189 {
 190         if(render_engine)
 191                 render_engine->interrupt_playback();
 192
 193 // Stop pausing
 194         pause_lock->unlock();
 195
 196 // Wait for tracking to finish if it is running
 197         if(wait_tracking)
 198         {
 199                 tracking_done->lock("PlaybackEngine::interrupt_playback");
 200                 tracking_done->unlock();
 201         }
 202 }
 203
 204
 205 // Return 1 if levels exist
 206 int PlaybackEngine::get_output_levels(double *levels, long position)
 207 {
 208         int result = 0;
 209         if(render_engine && render_engine->do_audio)
 210         {
 211                 result = 1;
 212                 render_engine->get_output_levels(levels, position);
 213         }
 214         return result;
 215 }
 216
 217
 218 int PlaybackEngine::get_module_levels(ArrayList<double> *module_levels, long position)
 219 {
 220         int result = 0;
 221         if(render_engine && render_engine->do_audio)
 222         {
 223                 result = 1;
 224                 render_engine->get_module_levels(module_levels, position);
 225         }
 226         return result;
 227 }
 228
 229 int PlaybackEngine::brender_available(long position)
 230 {
 231         return 0;
 232 }
 233
 234 void PlaybackEngine::init_cursor()
 235 {
 236 }
 237
 238 void PlaybackEngine::stop_cursor()
 239 {
 240 }
 241
 242
 243 void PlaybackEngine::init_tracking()
 244 {
 245         if(!command->single_frame())
 246                 tracking_active = 1;
 247         else
 248                 tracking_active = 0;
 249
 250         tracking_position = command->playbackstart;
 251         tracking_done->lock("PlaybackEngine::init_tracking");
 252         init_cursor();
 253 }
 254
 255 void PlaybackEngine::stop_tracking()
 256 {
 257         tracking_active = 0;
 258         stop_cursor();
 259         tracking_done->unlock();
 260 }
 261
 262 void PlaybackEngine::update_tracking(double position)
 263 {
 264         tracking_lock->lock("PlaybackEngine::update_tracking");
 265
 266         tracking_position = position;
 267
 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 = command->get_edl()->local_session->loop_start;
 300                         double loop_end = command->get_edl()->local_session->loop_end;
 301                         double loop_size = loop_end - loop_start;
 302
 303                         if(command->get_direction() == PLAY_FORWARD)
 304                         {
 305 // Interpolate
 306                                 result = tracking_position +
 307                                         command->get_speed() *
 308                                         tracking_timer.get_difference() /
 309                                         1000.0;
 310
 311 // Compensate for loop
 312 //printf("PlaybackEngine::get_tracking_position 1 %d\n", command->get_edl()->local_session->loop_playback);
 313                                 if(command->get_edl()->local_session->loop_playback)
 314                                 {
 315                                         while(result > loop_end) result -= loop_size;
 316                                 }
 317                         }
 318                         else
 319                         {
 320 // Interpolate
 321                                 result = tracking_position -
 322                                         command->get_speed() *
 323                                         tracking_timer.get_difference() /
 324                                         1000.0;
 325
 326 // Compensate for loop
 327                                 if(command->get_edl()->local_session->loop_playback)
 328                                 {
 329                                         while(result < loop_start) result += loop_size;
 330                                 }
 331                         }
 332
 333                 }
 334         }
 335         else
 336                 result = tracking_position;
 337
 338         tracking_lock->unlock();
 339 //printf("PlaybackEngine::get_tracking_position %f %f %d\n", result, tracking_position, tracking_active);
 340
 341 // Adjust for loop
 342
 343         return result;
 344 }
 345
 346 void PlaybackEngine::update_transport(int command, int paused)
 347 {
 348 //      mwindow->gui->lock_window();
 349 //      mwindow->gui->mbuttons->transport->update_gui_state(command, paused);
 350 //      mwindow->gui->unlock_window();
 351 }
 352
 353 void PlaybackEngine::run()
 354 {
 355         start_lock->unlock();
 356
 357         do
 358         {
 359 // Wait for current command to finish
 360                 que->output_lock->lock("PlaybackEngine::run");
 361
 362 //printf("PlaybackEngine::run 1\n");
 363                 wait_render_engine();
 364 //printf("PlaybackEngine::run 2\n");
 365
 366
 367 // Read the new command
 368                 que->input_lock->lock("PlaybackEngine::run");
 369                 if(done) return;
 370
 371                 command->copy_from(&que->command);
 372                 que->command.reset();
 373                 que->input_lock->unlock();
 374
 375
 376
 377                 switch(command->command)
 378                 {
 379 // Parameter change only
 380                         case COMMAND_NONE:
 381 //                              command->command = last_command;
 382                                 perform_change();
 383                                 break;
 384
 385                         case PAUSE:
 386                                 init_cursor();
 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                                 last_command = command->command;
 397                                 perform_change();
 398                                 arm_render_engine();
 399 // Dispatch the command
 400                                 start_render_engine();
 401                                 break;
 402
 403                         default:
 404                                 last_command = command->command;
 405                                 is_playing_back = 1;
 406                                 if(command->command == SINGLE_FRAME_FWD ||
 407                                         command->command == SINGLE_FRAME_REWIND)
 408                                 {
 409                                         command->playbackstart = get_tracking_position();
 410                                 }
 411
 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
 424
 425 //printf("PlaybackEngine::run 100\n");
 426         }while(!done);
 427 }
 428
 429
 430