cinelerra-5.0/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 // Don't reset the change type for commands which don't perform the change
  56         if(command != STOP) change_type = 0;
  57         command = COMMAND_NONE;
  58 }
  59
  60 EDL* TransportCommand::get_edl()
  61 {
  62         return edl;
  63 }
  64
  65 void TransportCommand::delete_edl()
  66 {
  67         edl->Garbage::remove_user();
  68         edl = 0;
  69 }
  70
  71 void TransportCommand::new_edl()
  72 {
  73         edl = new EDL;
  74         edl->create_objects();
  75 }
  76
  77
  78 void TransportCommand::copy_from(TransportCommand *command)
  79 {
  80         this->command = command->command;
  81         this->change_type = command->change_type;
  82         this->edl->copy_all(command->edl);
  83         this->start_position = command->start_position;
  84         this->end_position = command->end_position;
  85         this->playbackstart = command->playbackstart;
  86         this->realtime = command->realtime;
  87         this->resume = command->resume;
  88 }
  89
  90 TransportCommand& TransportCommand::operator=(TransportCommand &command)
  91 {
  92         copy_from(&command);
  93         return *this;
  94 }
  95
  96 int TransportCommand::single_frame()
  97 {
  98         return (command == SINGLE_FRAME_FWD ||
  99                 command == SINGLE_FRAME_REWIND ||
 100                 command == CURRENT_FRAME);
 101 }
 102
 103
 104 int TransportCommand::get_direction()
 105 {
 106         switch(command)
 107         {
 108                 case SINGLE_FRAME_FWD:
 109                 case NORMAL_FWD:
 110                 case FAST_FWD:
 111                 case SLOW_FWD:
 112                 case CURRENT_FRAME:
 113                         return PLAY_FORWARD;
 114                         break;
 115
 116                 case SINGLE_FRAME_REWIND:
 117                 case NORMAL_REWIND:
 118                 case FAST_REWIND:
 119                 case SLOW_REWIND:
 120                         return PLAY_REVERSE;
 121                         break;
 122
 123                 default:
 124                         return PLAY_FORWARD;
 125                         break;
 126         }
 127 }
 128
 129 float TransportCommand::get_speed()
 130 {
 131         switch(command)
 132         {
 133                 case SLOW_FWD:
 134                 case SLOW_REWIND:
 135                         return 0.5;
 136
 137                 case NORMAL_FWD:
 138                 case NORMAL_REWIND:
 139                 case SINGLE_FRAME_FWD:
 140                 case SINGLE_FRAME_REWIND:
 141                 case CURRENT_FRAME:
 142                         return 1.;
 143
 144                 case FAST_FWD:
 145                 case FAST_REWIND:
 146                         return 2.;
 147         }
 148
 149         return 0.;
 150 }
 151
 152 // Assume starting without pause
 153 void TransportCommand::set_playback_range(EDL *edl, int use_inout)
 154 {
 155         if(!edl) edl = this->edl;
 156
 157
 158
 159
 160         switch(command)
 161         {
 162                 case SLOW_FWD:
 163                 case FAST_FWD:
 164                 case NORMAL_FWD:
 165                         start_position = edl->local_session->get_selectionstart(1);
 166                         if(EQUIV(edl->local_session->get_selectionend(1), edl->local_session->get_selectionstart(1)))
 167                                 end_position = edl->tracks->total_playable_length();
 168                         else
 169                                 end_position = edl->local_session->get_selectionend(1);
 170 // this prevents a crash if start position is after the loop when playing forwards
 171                     if (edl->local_session->loop_playback &&
 172                                 start_position > edl->local_session->loop_end)
 173                         {
 174                                     start_position = edl->local_session->loop_start;
 175                         }
 176                         break;
 177
 178                 case SLOW_REWIND:
 179                 case FAST_REWIND:
 180                 case NORMAL_REWIND:
 181                         end_position = edl->local_session->get_selectionend(1);
 182                         if(EQUIV(edl->local_session->get_selectionend(1), edl->local_session->get_selectionstart(1)))
 183                                 start_position = 0;
 184                         else
 185                                 start_position = edl->local_session->get_selectionstart(1);
 186
 187 // this prevents a crash if start position is before the loop when playing backwards
 188                         if (edl->local_session->loop_playback &&
 189                                 end_position <= edl->local_session->loop_start)
 190                         {
 191                                         end_position = edl->local_session->loop_end;
 192                         }
 193                         break;
 194
 195                 case CURRENT_FRAME:
 196                 case SINGLE_FRAME_FWD:
 197                         start_position = edl->local_session->get_selectionstart(1);
 198                         end_position = start_position +
 199                                 1.0 /
 200                                 edl->session->frame_rate;
 201                         break;
 202
 203                 case SINGLE_FRAME_REWIND:
 204                         start_position = edl->local_session->get_selectionend(1);
 205                         end_position = start_position -
 206                                 1.0 /
 207                                 edl->session->frame_rate;
 208                         break;
 209         }
 210
 211
 212         if(use_inout)
 213         {
 214                 if(edl->local_session->inpoint_valid())
 215                         start_position = edl->local_session->get_inpoint();
 216                 if(edl->local_session->outpoint_valid())
 217                         end_position = edl->local_session->get_outpoint();
 218         }
 219
 220         switch(get_direction())
 221         {
 222                 case PLAY_FORWARD:
 223                         playbackstart = start_position;
 224                         break;
 225
 226                 case PLAY_REVERSE:
 227                         playbackstart = end_position;
 228                         break;
 229         }
 230
 231 }
 232
 233 void TransportCommand::adjust_playback_range()
 234 {
 235
 236
 237         if(edl->local_session->inpoint_valid() ||
 238                 edl->local_session->outpoint_valid())
 239         {
 240                 if(edl->local_session->inpoint_valid())
 241                         start_position = edl->local_session->get_inpoint();
 242                 else
 243                         start_position = 0;
 244
 245                 if(edl->local_session->outpoint_valid())
 246                         end_position = edl->local_session->get_outpoint();
 247                 else
 248                         end_position = edl->tracks->total_playable_length();
 249         }
 250 }
 251
 252
 253
 254
 255
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 257
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 259
 260
 261
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 263
 264
 265
 266
 267
 268
 269 TransportQue::TransportQue()
 270 {
 271         input_lock = new Condition(1, "TransportQue::input_lock");
 272         output_lock = new Condition(0, "TransportQue::output_lock", 1);
 273 }
 274
 275 TransportQue::~TransportQue()
 276 {
 277         delete input_lock;
 278         delete output_lock;
 279 }
 280
 281 int TransportQue::send_command(int command,
 282                 int change_type,
 283                 EDL *new_edl,
 284                 int realtime,
 285                 int resume,
 286                 int use_inout)
 287 {
 288         input_lock->lock("TransportQue::send_command 1");
 289         this->command.command = command;
 290 // Mutually exclusive operation
 291         this->command.change_type |= change_type;
 292         this->command.realtime = realtime;
 293         this->command.resume = resume;
 294
 295         if(new_edl)
 296         {
 297 // Just change the EDL if the change requires it because renderengine
 298 // structures won't point to the new EDL otherwise and because copying the
 299 // EDL for every cursor movement is slow.
 300                 if(change_type == CHANGE_EDL ||
 301                         (uint32_t)change_type == CHANGE_ALL)
 302                 {
 303 // Copy EDL
 304                         this->command.get_edl()->copy_all(new_edl);
 305                 }
 306                 else
 307                 if(change_type == CHANGE_PARAMS)
 308                 {
 309                         this->command.get_edl()->synchronize_params(new_edl);
 310                 }
 311
 312 // Set playback range
 313                 this->command.set_playback_range(new_edl, use_inout);
 314         }
 315
 316         input_lock->unlock();
 317
 318         output_lock->unlock();
 319         return 0;
 320 }
 321
 322 void TransportQue::update_change_type(int change_type)
 323 {
 324         input_lock->lock("TransportQue::update_change_type");
 325         this->command.change_type |= change_type;
 326         input_lock->unlock();
 327 }