cinelerra-5.1/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 // Don't reset the change type for commands which don't perform the change
  57         if(command != STOP) change_type = 0;
  58         command = COMMAND_NONE;
  59 }
  60
  61 EDL* TransportCommand::get_edl()
  62 {
  63         return edl;
  64 }
  65
  66 void TransportCommand::delete_edl()
  67 {
  68         edl->Garbage::remove_user();
  69         edl = 0;
  70 }
  71
  72 void TransportCommand::new_edl()
  73 {
  74         edl = new EDL;
  75         edl->create_objects();
  76 }
  77
  78
  79 void TransportCommand::copy_from(TransportCommand *command)
  80 {
  81         this->command = command->command;
  82         this->change_type = command->change_type;
  83         this->edl->copy_all(command->edl);
  84         this->start_position = command->start_position;
  85         this->end_position = command->end_position;
  86         this->playbackstart = command->playbackstart;
  87         this->realtime = command->realtime;
  88         this->resume = command->resume;
  89         this->audio_toggle = command->audio_toggle;
  90 }
  91
  92 TransportCommand& TransportCommand::operator=(TransportCommand &command)
  93 {
  94         copy_from(&command);
  95         return *this;
  96 }
  97
  98 int TransportCommand::single_frame()
  99 {
 100         return (command == SINGLE_FRAME_FWD ||
 101                 command == SINGLE_FRAME_REWIND ||
 102                 command == CURRENT_FRAME);
 103 }
 104
 105
 106 int TransportCommand::get_direction()
 107 {
 108         switch(command)
 109         {
 110                 case SINGLE_FRAME_FWD:
 111                 case NORMAL_FWD:
 112                 case FAST_FWD:
 113                 case SLOW_FWD:
 114                 case CURRENT_FRAME:
 115                         return PLAY_FORWARD;
 116
 117                 case SINGLE_FRAME_REWIND:
 118                 case NORMAL_REWIND:
 119                 case FAST_REWIND:
 120                 case SLOW_REWIND:
 121                         return PLAY_REVERSE;
 122
 123                 default:
 124                         break;
 125         }
 126         return PLAY_FORWARD;
 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, int toggle_audio)
 154 {
 155         if(!edl) edl = this->edl;
 156
 157         switch(command)
 158         {
 159                 case SLOW_FWD:
 160                 case FAST_FWD:
 161                 case NORMAL_FWD:
 162                         start_position = edl->local_session->get_selectionstart(1);
 163                         if(EQUIV(edl->local_session->get_selectionend(1), edl->local_session->get_selectionstart(1)))
 164                                 end_position = edl->tracks->total_playable_length();
 165                         else
 166                                 end_position = edl->local_session->get_selectionend(1);
 167 // this prevents a crash if start position is after the loop when playing forwards
 168                     if (edl->local_session->loop_playback &&
 169                                 start_position > edl->local_session->loop_end)
 170                         {
 171                                     start_position = edl->local_session->loop_start;
 172                         }
 173                         break;
 174
 175                 case SLOW_REWIND:
 176                 case FAST_REWIND:
 177                 case NORMAL_REWIND:
 178                         end_position = edl->local_session->get_selectionend(1);
 179                         if(EQUIV(edl->local_session->get_selectionend(1), edl->local_session->get_selectionstart(1)))
 180                                 start_position = 0;
 181                         else
 182                                 start_position = edl->local_session->get_selectionstart(1);
 183
 184 // this prevents a crash if start position is before the loop when playing backwards
 185                         if (edl->local_session->loop_playback &&
 186                                 end_position <= edl->local_session->loop_start)
 187                         {
 188                                         end_position = edl->local_session->loop_end;
 189                         }
 190                         break;
 191
 192                 case CURRENT_FRAME:
 193                 case SINGLE_FRAME_FWD:
 194                         start_position = edl->local_session->get_selectionstart(1);
 195                         end_position = start_position +
 196                                 1.0 /
 197                                 edl->session->frame_rate;
 198                         break;
 199
 200                 case SINGLE_FRAME_REWIND:
 201                         start_position = edl->local_session->get_selectionend(1);
 202                         end_position = start_position -
 203                                 1.0 /
 204                                 edl->session->frame_rate;
 205                         break;
 206         }
 207
 208
 209         if(use_inout)
 210         {
 211                 if(edl->local_session->inpoint_valid())
 212                         start_position = edl->local_session->get_inpoint();
 213                 if(edl->local_session->outpoint_valid())
 214                         end_position = edl->local_session->get_outpoint();
 215         }
 216
 217         switch(get_direction())
 218         {
 219                 case PLAY_FORWARD:
 220                         playbackstart = start_position;
 221                         break;
 222
 223                 case PLAY_REVERSE:
 224                         playbackstart = end_position;
 225                         break;
 226         }
 227
 228         audio_toggle = toggle_audio;
 229 }
 230
 231 void TransportCommand::playback_range_adjust_inout()
 232 {
 233         if(edl->local_session->inpoint_valid() ||
 234                 edl->local_session->outpoint_valid())
 235         {
 236                 playback_range_inout();
 237         }
 238 }
 239
 240 void TransportCommand::playback_range_inout()
 241 {
 242         if(edl->local_session->inpoint_valid())
 243                 start_position = edl->local_session->get_inpoint();
 244         else
 245                 start_position = 0;
 246
 247         if(edl->local_session->outpoint_valid())
 248                 end_position = edl->local_session->get_outpoint();
 249         else
 250                 end_position = edl->tracks->total_playable_length();
 251 }
 252
 253 void TransportCommand::playback_range_project()
 254 {
 255         start_position = 0;
 256         end_position = edl->tracks->total_playable_length();
 257 }
 258
 259 void TransportCommand::playback_range_1frame()
 260 {
 261         start_position = end_position = edl->local_session->get_selectionstart(1);
 262         if( edl->session->frame_rate > 0 ) end_position += 1./edl->session->frame_rate;
 263 }
 264
 265
 266 TransportQue::TransportQue()
 267 {
 268         input_lock = new Condition(1, "TransportQue::input_lock");
 269         output_lock = new Condition(0, "TransportQue::output_lock", 1);
 270 }
 271
 272 TransportQue::~TransportQue()
 273 {
 274         delete input_lock;
 275         delete output_lock;
 276 }
 277
 278 int TransportQue::send_command(int command, int change_type, EDL *new_edl,
 279                 int realtime, int resume, int use_inout, int toggle_audio)
 280 {
 281         input_lock->lock("TransportQue::send_command 1");
 282         this->command.command = command;
 283 // Mutually exclusive operation
 284         this->command.change_type |= change_type;
 285         this->command.realtime = realtime;
 286         this->command.resume = resume;
 287
 288         if(new_edl)
 289         {
 290 // Just change the EDL if the change requires it because renderengine
 291 // structures won't point to the new EDL otherwise and because copying the
 292 // EDL for every cursor movement is slow.
 293                 if(change_type == CHANGE_EDL ||
 294                         (uint32_t)change_type == CHANGE_ALL)
 295                 {
 296 // Copy EDL
 297                         this->command.get_edl()->copy_all(new_edl);
 298                 }
 299                 else
 300                 if(change_type == CHANGE_PARAMS)
 301                 {
 302                         this->command.get_edl()->synchronize_params(new_edl);
 303                 }
 304
 305 // Set playback range
 306                 this->command.set_playback_range(new_edl, use_inout, toggle_audio);
 307         }
 308
 309         input_lock->unlock();
 310
 311         output_lock->unlock();
 312         return 0;
 313 }
 314
 315 void TransportQue::update_change_type(int change_type)
 316 {
 317         input_lock->lock("TransportQue::update_change_type");
 318         this->command.change_type |= change_type;
 319         input_lock->unlock();
 320 }