cinelerra/playbackengine.C

   1 #include "cache.h"
   2 #include "condition.h"
   3 #include "bchash.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(preferences, mwindow->plugindb);
 151         if(!video_cache)
 152                 video_cache = new CICache(preferences, mwindow->plugindb);
 153 }
 154
 155
 156 void PlaybackEngine::perform_change()
 157 {
 158         switch(command->change_type)
 159         {
 160                 case CHANGE_ALL:
 161                         create_cache();
 162                 case CHANGE_EDL:
 163                         create_render_engine();
 164                 case CHANGE_PARAMS:
 165                         if(command->change_type != CHANGE_EDL &&
 166                                 command->change_type != CHANGE_ALL)
 167                                 render_engine->edl->synchronize_params(command->get_edl());
 168                 case CHANGE_NONE:
 169                         break;
 170         }
 171 }
 172
 173 void PlaybackEngine::sync_parameters(EDL *edl)
 174 {
 175 // TODO: lock out render engine from keyframe deletions
 176         command->get_edl()->synchronize_params(edl);
 177         if(render_engine) render_engine->edl->synchronize_params(edl);
 178 }
 179
 180
 181 void PlaybackEngine::interrupt_playback(int wait_tracking)
 182 {
 183         if(render_engine)
 184                 render_engine->interrupt_playback();
 185
 186 // Stop pausing
 187         pause_lock->unlock();
 188
 189 // Wait for tracking to finish if it is running
 190         if(wait_tracking)
 191         {
 192                 tracking_done->lock("PlaybackEngine::interrupt_playback");
 193                 tracking_done->unlock();
 194         }
 195 }
 196
 197
 198 // Return 1 if levels exist
 199 int PlaybackEngine::get_output_levels(double *levels, long position)
 200 {
 201         int result = 0;
 202         if(render_engine && render_engine->do_audio)
 203         {
 204                 result = 1;
 205                 render_engine->get_output_levels(levels, position);
 206         }
 207         return result;
 208 }
 209
 210
 211 int PlaybackEngine::get_module_levels(ArrayList<double> *module_levels, long position)
 212 {
 213         int result = 0;
 214         if(render_engine && render_engine->do_audio)
 215         {
 216                 result = 1;
 217                 render_engine->get_module_levels(module_levels, position);
 218         }
 219         return result;
 220 }
 221
 222 int PlaybackEngine::brender_available(long position)
 223 {
 224         return 0;
 225 }
 226
 227 void PlaybackEngine::init_cursor()
 228 {
 229 }
 230
 231 void PlaybackEngine::stop_cursor()
 232 {
 233 }
 234
 235
 236 void PlaybackEngine::init_tracking()
 237 {
 238         if(!command->single_frame())
 239                 tracking_active = 1;
 240         else
 241                 tracking_active = 0;
 242
 243         tracking_position = command->playbackstart;
 244         tracking_done->lock("PlaybackEngine::init_tracking");
 245         init_cursor();
 246 }
 247
 248 void PlaybackEngine::stop_tracking()
 249 {
 250         tracking_active = 0;
 251         stop_cursor();
 252         tracking_done->unlock();
 253 }
 254
 255 void PlaybackEngine::update_tracking(double position)
 256 {
 257         tracking_lock->lock("PlaybackEngine::update_tracking");
 258
 259         tracking_position = position;
 260
 261 // Signal that the timer is accurate.
 262         if(tracking_active) tracking_active = 2;
 263         tracking_timer.update();
 264         tracking_lock->unlock();
 265 }
 266
 267 double PlaybackEngine::get_tracking_position()
 268 {
 269         double result = 0;
 270
 271         tracking_lock->lock("PlaybackEngine::get_tracking_position");
 272
 273
 274 // Adjust for elapsed time since last update_tracking.
 275 // But tracking timer isn't accurate until the first update_tracking
 276 // so wait.
 277         if(tracking_active == 2)
 278         {
 279 //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));
 280
 281
 282 // Don't interpolate when every frame is played.
 283                 if(command->get_edl()->session->video_every_frame &&
 284                         render_engine &&
 285                         render_engine->do_video)
 286                 {
 287                         result = tracking_position;
 288                 }
 289                 else
 290 // Interpolate
 291                 {
 292                         double loop_start = command->get_edl()->local_session->loop_start;
 293                         double loop_end = command->get_edl()->local_session->loop_end;
 294                         double loop_size = loop_end - loop_start;
 295
 296                         if(command->get_direction() == PLAY_FORWARD)
 297                         {
 298 // Interpolate
 299                                 result = tracking_position +
 300                                         command->get_speed() *
 301                                         tracking_timer.get_difference() /
 302                                         1000.0;
 303
 304 // Compensate for loop
 305 //printf("PlaybackEngine::get_tracking_position 1 %d\n", command->get_edl()->local_session->loop_playback);
 306                                 if(command->get_edl()->local_session->loop_playback)
 307                                 {
 308                                         while(result > loop_end) result -= loop_size;
 309                                 }
 310                         }
 311                         else
 312                         {
 313 // Interpolate
 314                                 result = tracking_position -
 315                                         command->get_speed() *
 316                                         tracking_timer.get_difference() /
 317                                         1000.0;
 318
 319 // Compensate for loop
 320                                 if(command->get_edl()->local_session->loop_playback)
 321                                 {
 322                                         while(result < loop_start) result += loop_size;
 323                                 }
 324                         }
 325
 326                 }
 327         }
 328         else
 329                 result = tracking_position;
 330
 331         tracking_lock->unlock();
 332 //printf("PlaybackEngine::get_tracking_position %f %f %d\n", result, tracking_position, tracking_active);
 333
 334 // Adjust for loop
 335
 336         return result;
 337 }
 338
 339 void PlaybackEngine::update_transport(int command, int paused)
 340 {
 341 //      mwindow->gui->lock_window();
 342 //      mwindow->gui->mbuttons->transport->update_gui_state(command, paused);
 343 //      mwindow->gui->unlock_window();
 344 }
 345
 346 void PlaybackEngine::run()
 347 {
 348         start_lock->unlock();
 349
 350         do
 351         {
 352 // Wait for current command to finish
 353                 que->output_lock->lock("PlaybackEngine::run");
 354
 355                 wait_render_engine();
 356
 357
 358 // Read the new command
 359                 que->input_lock->lock("PlaybackEngine::run");
 360                 if(done) return;
 361
 362                 command->copy_from(&que->command);
 363                 que->command.reset();
 364                 que->input_lock->unlock();
 365
 366 //printf("PlaybackEngine::run 1 %d\n", command->command);
 367
 368
 369                 switch(command->command)
 370                 {
 371 // Parameter change only
 372                         case COMMAND_NONE:
 373 //                              command->command = last_command;
 374                                 perform_change();
 375                                 break;
 376
 377                         case PAUSE:
 378                                 init_cursor();
 379                                 pause_lock->lock("PlaybackEngine::run");
 380                                 stop_cursor();
 381                                 break;
 382
 383                         case STOP:
 384 // No changing
 385                                 break;
 386
 387                         case CURRENT_FRAME:
 388                                 last_command = command->command;
 389                                 perform_change();
 390                                 arm_render_engine();
 391 // Dispatch the command
 392                                 start_render_engine();
 393                                 break;
 394
 395                         default:
 396                                 last_command = command->command;
 397                                 is_playing_back = 1;
 398                                 if(command->command == SINGLE_FRAME_FWD ||
 399                                         command->command == SINGLE_FRAME_REWIND)
 400                                 {
 401                                         command->playbackstart = get_tracking_position();
 402                                 }
 403
 404                                 perform_change();
 405                                 arm_render_engine();
 406
 407 // Start tracking after arming so the tracking position doesn't change.
 408 // The tracking for a single frame command occurs during PAUSE
 409                                 init_tracking();
 410
 411 // Dispatch the command
 412                                 start_render_engine();
 413                                 break;
 414                 }
 415
 416
 417 //printf("PlaybackEngine::run 100\n");
 418         }while(!done);
 419 }
 420
 421
 422