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(int command)
  99 {
 100         return (command == SINGLE_FRAME_FWD ||
 101                 command == SINGLE_FRAME_REWIND ||
 102                 command == CURRENT_FRAME);
 103 }
 104 int TransportCommand::single_frame()
 105 {
 106         return single_frame(command);
 107 }
 108
 109
 110 int TransportCommand::get_direction(int command)
 111 {
 112         switch(command) {
 113         case SINGLE_FRAME_FWD:
 114         case NORMAL_FWD:
 115         case FAST_FWD:
 116         case SLOW_FWD:
 117         case CURRENT_FRAME:
 118                 return PLAY_FORWARD;
 119
 120         case SINGLE_FRAME_REWIND:
 121         case NORMAL_REWIND:
 122         case FAST_REWIND:
 123         case SLOW_REWIND:
 124                 return PLAY_REVERSE;
 125
 126         default:
 127                 break;
 128         }
 129         return PLAY_FORWARD;
 130 }
 131 int TransportCommand::get_direction()
 132 {
 133         return get_direction(command);
 134 }
 135
 136 float TransportCommand::get_speed(int command)
 137 {
 138         switch(command) {
 139         case SLOW_FWD:
 140         case SLOW_REWIND:
 141                 return 0.5;
 142
 143         case NORMAL_FWD:
 144         case NORMAL_REWIND:
 145         case SINGLE_FRAME_FWD:
 146         case SINGLE_FRAME_REWIND:
 147         case CURRENT_FRAME:
 148                 return 1.;
 149
 150         case FAST_FWD:
 151         case FAST_REWIND:
 152                 return 2.;
 153         }
 154
 155         return 0.;
 156 }
 157 float TransportCommand::get_speed()
 158 {
 159         return get_speed(command);
 160 }
 161
 162 // Assume starting without pause
 163 void TransportCommand::set_playback_range(EDL *edl, int use_inout, int toggle_audio)
 164 {
 165         if(!edl) edl = this->edl;
 166
 167         switch(command)
 168         {
 169                 case SLOW_FWD:
 170                 case FAST_FWD:
 171                 case NORMAL_FWD:
 172                         start_position = edl->local_session->get_selectionstart(1);
 173                         if(EQUIV(edl->local_session->get_selectionend(1), edl->local_session->get_selectionstart(1)))
 174                                 end_position = edl->tracks->total_playable_length();
 175                         else
 176                                 end_position = edl->local_session->get_selectionend(1);
 177 // this prevents a crash if start position is after the loop when playing forwards
 178                     if (edl->local_session->loop_playback &&
 179                                 start_position > edl->local_session->loop_end)
 180                         {
 181                                     start_position = edl->local_session->loop_start;
 182                         }
 183                         break;
 184
 185                 case SLOW_REWIND:
 186                 case FAST_REWIND:
 187                 case NORMAL_REWIND:
 188                         end_position = edl->local_session->get_selectionend(1);
 189                         if(EQUIV(edl->local_session->get_selectionend(1), edl->local_session->get_selectionstart(1)))
 190                                 start_position = 0;
 191                         else
 192                                 start_position = edl->local_session->get_selectionstart(1);
 193
 194 // this prevents a crash if start position is before the loop when playing backwards
 195                         if (edl->local_session->loop_playback &&
 196                                 end_position <= edl->local_session->loop_start)
 197                         {
 198                                         end_position = edl->local_session->loop_end;
 199                         }
 200                         break;
 201
 202                 case CURRENT_FRAME:
 203                 case SINGLE_FRAME_FWD:
 204                         start_position = edl->local_session->get_selectionstart(1);
 205                         end_position = start_position + 1.0 / edl->session->frame_rate;
 206                         break;
 207
 208                 case SINGLE_FRAME_REWIND:
 209                         end_position = edl->local_session->get_selectionend(1);
 210                         start_position = end_position - 1.0 / edl->session->frame_rate;
 211                         break;
 212         }
 213
 214
 215         if(use_inout)
 216         {
 217                 if(edl->local_session->inpoint_valid())
 218                         start_position = edl->local_session->get_inpoint();
 219                 if(edl->local_session->outpoint_valid())
 220                         end_position = edl->local_session->get_outpoint();
 221         }
 222
 223         switch(get_direction())
 224         {
 225                 case PLAY_FORWARD:
 226                         playbackstart = start_position;
 227                         break;
 228
 229                 case PLAY_REVERSE:
 230                         playbackstart = end_position;
 231                         break;
 232         }
 233
 234         audio_toggle = toggle_audio;
 235 }
 236
 237 void TransportCommand::playback_range_adjust_inout()
 238 {
 239         if(edl->local_session->inpoint_valid() ||
 240                 edl->local_session->outpoint_valid())
 241         {
 242                 playback_range_inout();
 243         }
 244 }
 245
 246 void TransportCommand::playback_range_inout()
 247 {
 248         if(edl->local_session->inpoint_valid())
 249                 start_position = edl->local_session->get_inpoint();
 250         else
 251                 start_position = 0;
 252
 253         if(edl->local_session->outpoint_valid())
 254                 end_position = edl->local_session->get_outpoint();
 255         else
 256                 end_position = edl->tracks->total_playable_length();
 257 }
 258
 259 void TransportCommand::playback_range_project()
 260 {
 261         start_position = 0;
 262         end_position = edl->tracks->total_playable_length();
 263 }
 264
 265 void TransportCommand::playback_range_1frame()
 266 {
 267         start_position = end_position = edl->local_session->get_selectionstart(1);
 268         if( edl->session->frame_rate > 0 ) end_position += 1./edl->session->frame_rate;
 269 }
 270
 271
 272 TransportQue::TransportQue()
 273 {
 274         input_lock = new Condition(1, "TransportQue::input_lock");
 275         output_lock = new Condition(0, "TransportQue::output_lock", 1);
 276 }
 277
 278 TransportQue::~TransportQue()
 279 {
 280         delete input_lock;
 281         delete output_lock;
 282 }
 283
 284 int TransportQue::send_command(int command, int change_type, EDL *new_edl,
 285                 int realtime, int resume, int use_inout, int toggle_audio)
 286 {
 287         input_lock->lock("TransportQue::send_command 1");
 288         this->command.command = command;
 289 // Mutually exclusive operation
 290         this->command.change_type |= change_type;
 291         this->command.realtime = realtime;
 292         this->command.resume = resume;
 293
 294         if(new_edl)
 295         {
 296 // Just change the EDL if the change requires it because renderengine
 297 // structures won't point to the new EDL otherwise and because copying the
 298 // EDL for every cursor movement is slow.
 299                 if(change_type == CHANGE_EDL ||
 300                         (uint32_t)change_type == CHANGE_ALL)
 301                 {
 302 // Copy EDL
 303                         this->command.get_edl()->copy_all(new_edl);
 304                 }
 305                 else
 306                 if(change_type == CHANGE_PARAMS)
 307                 {
 308                         this->command.get_edl()->synchronize_params(new_edl);
 309                 }
 310
 311 // Set playback range
 312                 this->command.set_playback_range(new_edl, use_inout, toggle_audio);
 313         }
 314
 315         input_lock->unlock();
 316
 317         output_lock->unlock();
 318         return 0;
 319 }
 320
 321 void TransportQue::update_change_type(int change_type)
 322 {
 323         input_lock->lock("TransportQue::update_change_type");
 324         this->command.change_type |= change_type;
 325         input_lock->unlock();
 326 }