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 = command->get_edl()->local_session->loop_start;
 297                         double loop_end = command->get_edl()->local_session->loop_end;
 298                         double loop_size = loop_end - loop_start;
 299
 300                         if(command->get_direction() == PLAY_FORWARD)
 301                         {
 302 // Interpolate
 303                                 result = tracking_position +
 304                                         command->get_speed() *
 305                                         tracking_timer.get_difference() /
 306                                         1000.0;
 307
 308 // Compensate for loop
 309 //printf("PlaybackEngine::get_tracking_position 1 %d\n", command->get_edl()->local_session->loop_playback);
 310                                 if(command->get_edl()->local_session->loop_playback)
 311                                 {
 312                                         while(result > loop_end) result -= loop_size;
 313                                 }
 314                         }
 315                         else
 316                         {
 317 // Interpolate
 318                                 result = tracking_position -
 319                                         command->get_speed() *
 320                                         tracking_timer.get_difference() /
 321                                         1000.0;
 322
 323 // Compensate for loop
 324                                 if(command->get_edl()->local_session->loop_playback)
 325                                 {
 326                                         while(result < loop_start) result += loop_size;
 327                                 }
 328                         }
 329
 330                 }
 331         }
 332         else
 333                 result = tracking_position;
 334
 335         tracking_lock->unlock();
 336 //printf("PlaybackEngine::get_tracking_position %f %f %d\n", result, tracking_position, tracking_active);
 337
 338 // Adjust for loop
 339
 340         return result;
 341 }
 342
 343 void PlaybackEngine::update_transport(int command, int paused)
 344 {
 345 //      mwindow->gui->lock_window();
 346 //      mwindow->gui->mbuttons->transport->update_gui_state(command, paused);
 347 //      mwindow->gui->unlock_window();
 348 }
 349
 350 void PlaybackEngine::run()
 351 {
 352         start_lock->unlock();
 353
 354         do
 355         {
 356 // Wait for current command to finish
 357                 que->output_lock->lock("PlaybackEngine::run");
 358
 359                 wait_render_engine();
 360
 361
 362 // Read the new command
 363                 que->input_lock->lock("PlaybackEngine::run");
 364                 if(done) return;
 365
 366                 command->copy_from(&que->command);
 367                 que->command.reset();
 368                 que->input_lock->unlock();
 369
 370 //printf("PlaybackEngine::run 1 %d\n", command->command);
 371
 372
 373                 switch(command->command)
 374                 {
 375 // Parameter change only
 376                         case COMMAND_NONE:
 377 //                              command->command = last_command;
 378                                 perform_change();
 379                                 break;
 380
 381                         case PAUSE:
 382                                 init_cursor(0);
 383                                 pause_lock->lock("PlaybackEngine::run");
 384                                 stop_cursor();
 385                                 break;
 386
 387                         case STOP:
 388 // No changing
 389                                 break;
 390
 391                         case CURRENT_FRAME:
 392                                 last_command = command->command;
 393                                 perform_change();
 394                                 arm_render_engine();
 395 // Dispatch the command
 396                                 start_render_engine();
 397                                 break;
 398
 399                         default:
 400                                 last_command = command->command;
 401                                 is_playing_back = 1;
 402                                 if(command->command == SINGLE_FRAME_FWD ||
 403                                         command->command == SINGLE_FRAME_REWIND)
 404                                 {
 405                                         command->playbackstart = get_tracking_position();
 406                                 }
 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         }while(!done);
 423 }
 424
 425
 426