cinelerra-5.0/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                 case PLAYBACK_BUZ:
 111                         return mwindow->channeldb_buz;
 112         }
 113         return 0;
 114 }
 115
 116 int PlaybackEngine::create_render_engine()
 117 {
 118 // Fix playback configurations
 119         delete_render_engine();
 120
 121
 122         render_engine = new RenderEngine(this,
 123                 preferences,
 124                 output,
 125                 get_channeldb(),
 126                 0);
 127 //printf("PlaybackEngine::create_render_engine %d\n", __LINE__);
 128         return 0;
 129 }
 130
 131 void PlaybackEngine::delete_render_engine()
 132 {
 133         renderengine_lock->lock("PlaybackEngine::delete_render_engine");
 134         delete render_engine;
 135         render_engine = 0;
 136         renderengine_lock->unlock();
 137 }
 138
 139 void PlaybackEngine::arm_render_engine()
 140 {
 141         if(render_engine)
 142                 render_engine->arm_command(command);
 143 }
 144
 145 void PlaybackEngine::start_render_engine()
 146 {
 147         if(render_engine) render_engine->start_command();
 148 }
 149
 150 void PlaybackEngine::wait_render_engine()
 151 {
 152         if(command->realtime && render_engine)
 153         {
 154                 render_engine->join();
 155         }
 156 }
 157
 158 void PlaybackEngine::create_cache()
 159 {
 160         if(audio_cache) { delete audio_cache;  audio_cache = 0; }
 161         if(video_cache) { delete video_cache;  video_cache = 0; }
 162         if(!audio_cache) audio_cache = new CICache(preferences);
 163         if(!video_cache) video_cache = new CICache(preferences);
 164 }
 165
 166
 167 void PlaybackEngine::perform_change()
 168 {
 169         switch(command->change_type)
 170         {
 171                 case CHANGE_ALL:
 172                         create_cache();
 173                 case CHANGE_EDL:
 174                         create_render_engine();
 175                 case CHANGE_PARAMS:
 176                         if(command->change_type != CHANGE_EDL &&
 177                                 (uint32_t)command->change_type != CHANGE_ALL)
 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) render_engine->get_edl()->synchronize_params(edl);
 189 }
 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         {
 205                 tracking_done->lock("PlaybackEngine::interrupt_playback");
 206                 tracking_done->unlock();
 207         }
 208 }
 209
 210
 211 // Return 1 if levels exist
 212 int PlaybackEngine::get_output_levels(double *levels, long position)
 213 {
 214         int result = 0;
 215         if(render_engine && render_engine->do_audio)
 216         {
 217                 result = 1;
 218                 render_engine->get_output_levels(levels, position);
 219         }
 220         return result;
 221 }
 222
 223
 224 int PlaybackEngine::get_module_levels(ArrayList<double> *module_levels, long position)
 225 {
 226         int result = 0;
 227         if(render_engine && render_engine->do_audio)
 228         {
 229                 result = 1;
 230                 render_engine->get_module_levels(module_levels, position);
 231         }
 232         return result;
 233 }
 234
 235 int PlaybackEngine::brender_available(long position)
 236 {
 237         return 0;
 238 }
 239
 240 void PlaybackEngine::init_cursor()
 241 {
 242 }
 243
 244 void PlaybackEngine::init_meters()
 245 {
 246 }
 247
 248 void PlaybackEngine::stop_cursor()
 249 {
 250 }
 251
 252
 253 void PlaybackEngine::init_tracking()
 254 {
 255         if(!command->single_frame())
 256                 tracking_active = 1;
 257         else
 258                 tracking_active = 0;
 259
 260         tracking_position = command->playbackstart;
 261         tracking_done->lock("PlaybackEngine::init_tracking");
 262         init_cursor();
 263         init_meters();
 264 }
 265
 266 void PlaybackEngine::stop_tracking()
 267 {
 268         tracking_active = 0;
 269         stop_cursor();
 270         tracking_done->unlock();
 271 }
 272
 273 void PlaybackEngine::update_tracking(double position)
 274 {
 275         tracking_lock->lock("PlaybackEngine::update_tracking");
 276
 277         tracking_position = position;
 278
 279 // Signal that the timer is accurate.
 280         if(tracking_active) tracking_active = 2;
 281         tracking_timer.update();
 282         tracking_lock->unlock();
 283 }
 284
 285 double PlaybackEngine::get_tracking_position()
 286 {
 287         double result = 0;
 288
 289         tracking_lock->lock("PlaybackEngine::get_tracking_position");
 290
 291
 292 // Adjust for elapsed time since last update_tracking.
 293 // But tracking timer isn't accurate until the first update_tracking
 294 // so wait.
 295         if(tracking_active == 2)
 296         {
 297 //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));
 298
 299
 300 // Don't interpolate when every frame is played.
 301                 if(command->get_edl()->session->video_every_frame &&
 302                         render_engine &&
 303                         render_engine->do_video)
 304                 {
 305                         result = tracking_position;
 306                 }
 307                 else
 308 // Interpolate
 309                 {
 310                         double loop_start = command->get_edl()->local_session->loop_start;
 311                         double loop_end = command->get_edl()->local_session->loop_end;
 312                         double loop_size = loop_end - loop_start;
 313
 314                         if(command->get_direction() == PLAY_FORWARD)
 315                         {
 316 // Interpolate
 317                                 result = tracking_position +
 318                                         command->get_speed() *
 319                                         tracking_timer.get_difference() /
 320                                         1000.0;
 321
 322 // Compensate for loop
 323 //printf("PlaybackEngine::get_tracking_position 1 %d\n", command->get_edl()->local_session->loop_playback);
 324                                 if(command->get_edl()->local_session->loop_playback)
 325                                 {
 326                                         while(result > loop_end) result -= loop_size;
 327                                 }
 328                         }
 329                         else
 330                         {
 331 // Interpolate
 332                                 result = tracking_position -
 333                                         command->get_speed() *
 334                                         tracking_timer.get_difference() /
 335                                         1000.0;
 336
 337 // Compensate for loop
 338                                 if(command->get_edl()->local_session->loop_playback)
 339                                 {
 340                                         while(result < loop_start) result += loop_size;
 341                                 }
 342                         }
 343
 344                 }
 345         }
 346         else
 347                 result = tracking_position;
 348
 349         tracking_lock->unlock();
 350 //printf("PlaybackEngine::get_tracking_position %f %f %d\n", result, tracking_position, tracking_active);
 351
 352 // Adjust for loop
 353
 354         return result;
 355 }
 356
 357 void PlaybackEngine::update_transport(int command, int paused)
 358 {
 359 //      mwindow->gui->lock_window();
 360 //      mwindow->gui->mbuttons->transport->update_gui_state(command, paused);
 361 //      mwindow->gui->unlock_window();
 362 }
 363
 364 void PlaybackEngine::run()
 365 {
 366         start_lock->unlock();
 367
 368         do
 369         {
 370 // Wait for current command to finish
 371                 que->output_lock->lock("PlaybackEngine::run");
 372
 373                 wait_render_engine();
 374
 375
 376 // Read the new command
 377                 que->input_lock->lock("PlaybackEngine::run");
 378                 if(done) return;
 379
 380                 command->copy_from(&que->command);
 381                 que->command.reset();
 382                 que->input_lock->unlock();
 383
 384 //printf("PlaybackEngine::run 1 %d\n", command->command);
 385
 386
 387                 switch(command->command)
 388                 {
 389 // Parameter change only
 390                         case COMMAND_NONE:
 391 //                              command->command = last_command;
 392                                 perform_change();
 393                                 break;
 394
 395                         case PAUSE:
 396                                 init_cursor();
 397                                 pause_lock->lock("PlaybackEngine::run");
 398                                 stop_cursor();
 399                                 break;
 400
 401                         case STOP:
 402 // No changing
 403                                 break;
 404
 405                         case CURRENT_FRAME:
 406                                 last_command = command->command;
 407                                 perform_change();
 408                                 arm_render_engine();
 409 // Dispatch the command
 410                                 start_render_engine();
 411                                 break;
 412
 413                         default:
 414                                 last_command = command->command;
 415                                 is_playing_back = 1;
 416                                 if(command->command == SINGLE_FRAME_FWD ||
 417                                         command->command == SINGLE_FRAME_REWIND)
 418                                 {
 419                                         command->playbackstart = get_tracking_position();
 420                                 }
 421
 422                                 perform_change();
 423                                 arm_render_engine();
 424
 425 // Start tracking after arming so the tracking position doesn't change.
 426 // The tracking for a single frame command occurs during PAUSE
 427                                 init_tracking();
 428
 429 // Dispatch the command
 430                                 start_render_engine();
 431                                 break;
 432                 }
 433
 434
 435 //printf("PlaybackEngine::run 100\n");
 436         }while(!done);
 437 }
 438
 439
 440