cinelerra/transportque.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 "bcsignals.h"
  23 #include "clip.h"
  24 #include "condition.h"
  25 #include "edl.h"
  26 #include "edlsession.h"
  27 #include "localsession.h"
  28 #include "tracks.h"
  29 #include "transportque.h"
  30
  31 TransportCommand::TransportCommand()
  32 {
  33 // In rendering we want a master EDL so settings don't get clobbered
  34 // in the middle of a job.
  35         edl = new EDL;
  36         edl->create_objects();
  37         command = 0;
  38         change_type = 0;
  39         reset();
  40 }
  41
  42 TransportCommand::~TransportCommand()
  43 {
  44         edl->Garbage::remove_user();
  45 }
  46
  47 void TransportCommand::reset()
  48 {
  49         playbackstart = 0;
  50         start_position = 0;
  51         end_position = 0;
  52         infinite = 0;
  53         realtime = 0;
  54         resume = 0;
  55         audio_toggle = 0;
  56         play_loop = 0;
  57         displacement = 0;
  58 // Don't reset the change type for commands which don't perform the change
  59         if(command != STOP) change_type = 0;
  60         command = COMMAND_NONE;
  61 }
  62
  63 EDL* TransportCommand::get_edl()
  64 {
  65         return edl;
  66 }
  67
  68 void TransportCommand::delete_edl()
  69 {
  70         edl->Garbage::remove_user();
  71         edl = 0;
  72 }
  73
  74 void TransportCommand::new_edl()
  75 {
  76         edl = new EDL;
  77         edl->create_objects();
  78 }
  79
  80
  81 void TransportCommand::copy_from(TransportCommand *command)
  82 {
  83         this->command = command->command;
  84         this->change_type = command->change_type;
  85         this->edl->copy_all(command->edl);
  86         this->start_position = command->start_position;
  87         this->end_position = command->end_position;
  88         this->playbackstart = command->playbackstart;
  89         this->realtime = command->realtime;
  90         this->resume = command->resume;
  91         this->audio_toggle = command->audio_toggle;
  92         this->play_loop = command->play_loop;
  93         this->displacement = command->displacement;
  94 }
  95
  96 TransportCommand& TransportCommand::operator=(TransportCommand &command)
  97 {
  98         copy_from(&command);
  99         return *this;
 100 }
 101
 102 int TransportCommand::single_frame(int command)
 103 {
 104         return (command == SINGLE_FRAME_FWD || command == SINGLE_FRAME_REWIND ||
 105                 command == CURRENT_FRAME || command == LAST_FRAME);
 106 }
 107 int TransportCommand::single_frame()
 108 {
 109         return single_frame(command);
 110 }
 111
 112
 113 int TransportCommand::get_direction(int command)
 114 {
 115         switch(command) {
 116         case SINGLE_FRAME_FWD:
 117         case NORMAL_FWD:
 118         case FAST_FWD:
 119         case SLOW_FWD:
 120         case CURRENT_FRAME:
 121                 return PLAY_FORWARD;
 122
 123         case SINGLE_FRAME_REWIND:
 124         case NORMAL_REWIND:
 125         case FAST_REWIND:
 126         case SLOW_REWIND:
 127         case LAST_FRAME:
 128                 return PLAY_REVERSE;
 129
 130         default:
 131                 break;
 132         }
 133         return PLAY_FORWARD;
 134 }
 135 int TransportCommand::get_direction()
 136 {
 137         return get_direction(command);
 138 }
 139
 140 float TransportCommand::get_speed(int command)
 141 {
 142         switch(command) {
 143         case SLOW_FWD:
 144         case SLOW_REWIND:
 145                 return 0.5;
 146
 147         case NORMAL_FWD:
 148         case NORMAL_REWIND:
 149         case SINGLE_FRAME_FWD:
 150         case SINGLE_FRAME_REWIND:
 151         case CURRENT_FRAME:
 152         case LAST_FRAME:
 153                 return 1.;
 154
 155         case FAST_FWD:
 156         case FAST_REWIND:
 157                 return 2.;
 158         }
 159
 160         return 0.;
 161 }
 162 float TransportCommand::get_speed()
 163 {
 164         return get_speed(command);
 165 }
 166
 167 // Assume starting without pause
 168 void TransportCommand::set_playback_range(EDL *edl,
 169         int use_inout, int toggle_audio, int loop_play, int use_displacement)
 170 {
 171         if(!edl) edl = this->edl;
 172         double length = edl->tracks->total_playable_length();
 173         double frame_period = 1.0 / edl->session->frame_rate;
 174
 175         displacement = 0;
 176         audio_toggle = toggle_audio;
 177         play_loop = loop_play;
 178
 179         start_position = use_inout && edl->local_session->inpoint_valid() ?
 180                 edl->local_session->get_inpoint() :
 181                 !loop_play ? edl->local_session->get_selectionstart(1) : 0;
 182         end_position = use_inout && edl->local_session->outpoint_valid() ?
 183                 edl->local_session->get_outpoint() :
 184                 !loop_play ? edl->local_session->get_selectionend(1) : length;
 185
 186         if( !use_inout && EQUIV(start_position, end_position) ) {
 187 // starting play at or past end_position, play to end_position of media (for mixers)
 188                 if( start_position >= length )
 189                         length = edl->tracks->total_length();
 190                 switch( command ) {
 191                 case SLOW_FWD:
 192                 case FAST_FWD:
 193                 case NORMAL_FWD: {
 194                         end_position = length;
 195 // this prevents a crash if start_position position is after the loop when playing forwards
 196                         if( edl->local_session->loop_playback &&
 197                             start_position > edl->local_session->loop_end ) {
 198                                 start_position = edl->local_session->loop_start;
 199                         }
 200                         break; }
 201
 202                 case SLOW_REWIND:
 203                 case FAST_REWIND:
 204                 case NORMAL_REWIND:
 205                         start_position = 0;
 206 // this prevents a crash if start_position position is before the loop when playing backwards
 207                         if( edl->local_session->loop_playback &&
 208                             end_position <= edl->local_session->loop_start ) {
 209                                         end_position = edl->local_session->loop_end;
 210                         }
 211                         break;
 212
 213                 case CURRENT_FRAME:
 214                 case LAST_FRAME:
 215                 case SINGLE_FRAME_FWD:
 216                         end_position = start_position + frame_period;
 217                         break;
 218
 219                 case SINGLE_FRAME_REWIND:
 220                         start_position = end_position - frame_period;
 221                         break;
 222                 }
 223
 224                 if( use_displacement && (
 225                     (command != CURRENT_FRAME && get_direction() == PLAY_FORWARD ) ||
 226                     (command != LAST_FRAME    && get_direction() == PLAY_REVERSE ) ) ) {
 227                         start_position += frame_period;
 228                         end_position += frame_period;
 229                         displacement = 1;
 230                 }
 231         }
 232
 233         if( end_position < start_position )
 234                 end_position = start_position;
 235
 236         playbackstart = get_direction() == PLAY_FORWARD ?
 237                 start_position : end_position;
 238 }
 239
 240 void TransportCommand::playback_range_adjust_inout()
 241 {
 242         if(edl->local_session->inpoint_valid() ||
 243                 edl->local_session->outpoint_valid())
 244         {
 245                 playback_range_inout();
 246         }
 247 }
 248
 249 void TransportCommand::playback_range_inout()
 250 {
 251         if(edl->local_session->inpoint_valid())
 252                 start_position = edl->local_session->get_inpoint();
 253         else
 254                 start_position = 0;
 255
 256         if(edl->local_session->outpoint_valid())
 257                 end_position = edl->local_session->get_outpoint();
 258         else {
 259                 end_position = edl->tracks->total_playable_length();
 260                 if( start_position >= end_position )
 261                         end_position = edl->tracks->total_length();
 262         }
 263 }
 264
 265 void TransportCommand::playback_range_project()
 266 {
 267         start_position = 0;
 268         end_position = edl->tracks->total_playable_length();
 269 }
 270
 271 void TransportCommand::playback_range_1frame()
 272 {
 273         start_position = end_position = edl->local_session->get_selectionstart(1);
 274         if( edl->session->frame_rate > 0 ) end_position += 1./edl->session->frame_rate;
 275 }
 276
 277
 278 TransportQue::TransportQue()
 279 {
 280         input_lock = new Condition(1, "TransportQue::input_lock");
 281         output_lock = new Condition(0, "TransportQue::output_lock", 1);
 282 }
 283
 284 TransportQue::~TransportQue()
 285 {
 286         delete input_lock;
 287         delete output_lock;
 288 }
 289
 290 int TransportQue::send_command(int command, int change_type,
 291                 EDL *new_edl, int realtime, int resume, int use_inout,
 292                 int toggle_audio, int loop_play, int use_displacement)
 293 {
 294         input_lock->lock("TransportQue::send_command 1");
 295         this->command.command = command;
 296 // Mutually exclusive operation
 297         this->command.change_type |= change_type;
 298         this->command.realtime = realtime;
 299         this->command.resume = resume;
 300
 301         if(new_edl)
 302         {
 303 // Just change the EDL if the change requires it because renderengine
 304 // structures won't point to the new EDL otherwise and because copying the
 305 // EDL for every cursor movement is slow.
 306                 if(change_type == CHANGE_EDL ||
 307                         (uint32_t)change_type == CHANGE_ALL)
 308                 {
 309 // Copy EDL
 310                         this->command.get_edl()->copy_all(new_edl);
 311                 }
 312                 else
 313                 if(change_type == CHANGE_PARAMS)
 314                 {
 315                         this->command.get_edl()->synchronize_params(new_edl);
 316                 }
 317
 318 // Set playback range
 319                 this->command.set_playback_range(new_edl, use_inout,
 320                                 toggle_audio, loop_play, use_displacement);
 321         }
 322
 323         input_lock->unlock();
 324
 325         output_lock->unlock();
 326         return 0;
 327 }
 328
 329 void TransportQue::update_change_type(int change_type)
 330 {
 331         input_lock->lock("TransportQue::update_change_type");
 332         this->command.change_type |= change_type;
 333         input_lock->unlock();
 334 }