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         displacement = 0;
  57 // Don't reset the change type for commands which don't perform the change
  58         if(command != STOP) change_type = 0;
  59         command = COMMAND_NONE;
  60 }
  61
  62 EDL* TransportCommand::get_edl()
  63 {
  64         return edl;
  65 }
  66
  67 void TransportCommand::delete_edl()
  68 {
  69         edl->Garbage::remove_user();
  70         edl = 0;
  71 }
  72
  73 void TransportCommand::new_edl()
  74 {
  75         edl = new EDL;
  76         edl->create_objects();
  77 }
  78
  79
  80 void TransportCommand::copy_from(TransportCommand *command)
  81 {
  82         this->command = command->command;
  83         this->change_type = command->change_type;
  84         this->edl->copy_all(command->edl);
  85         this->start_position = command->start_position;
  86         this->end_position = command->end_position;
  87         this->playbackstart = command->playbackstart;
  88         this->realtime = command->realtime;
  89         this->resume = command->resume;
  90         this->audio_toggle = command->audio_toggle;
  91         this->displacement = command->displacement;
  92 }
  93
  94 TransportCommand& TransportCommand::operator=(TransportCommand &command)
  95 {
  96         copy_from(&command);
  97         return *this;
  98 }
  99
 100 int TransportCommand::single_frame(int command)
 101 {
 102         return (command == SINGLE_FRAME_FWD ||
 103                 command == SINGLE_FRAME_REWIND ||
 104                 command == CURRENT_FRAME);
 105 }
 106 int TransportCommand::single_frame()
 107 {
 108         return single_frame(command);
 109 }
 110
 111
 112 int TransportCommand::get_direction(int command)
 113 {
 114         switch(command) {
 115         case SINGLE_FRAME_FWD:
 116         case NORMAL_FWD:
 117         case FAST_FWD:
 118         case SLOW_FWD:
 119         case CURRENT_FRAME:
 120                 return PLAY_FORWARD;
 121
 122         case SINGLE_FRAME_REWIND:
 123         case NORMAL_REWIND:
 124         case FAST_REWIND:
 125         case SLOW_REWIND:
 126                 return PLAY_REVERSE;
 127
 128         default:
 129                 break;
 130         }
 131         return PLAY_FORWARD;
 132 }
 133 int TransportCommand::get_direction()
 134 {
 135         return get_direction(command);
 136 }
 137
 138 float TransportCommand::get_speed(int command)
 139 {
 140         switch(command) {
 141         case SLOW_FWD:
 142         case SLOW_REWIND:
 143                 return 0.5;
 144
 145         case NORMAL_FWD:
 146         case NORMAL_REWIND:
 147         case SINGLE_FRAME_FWD:
 148         case SINGLE_FRAME_REWIND:
 149         case CURRENT_FRAME:
 150                 return 1.;
 151
 152         case FAST_FWD:
 153         case FAST_REWIND:
 154                 return 2.;
 155         }
 156
 157         return 0.;
 158 }
 159 float TransportCommand::get_speed()
 160 {
 161         return get_speed(command);
 162 }
 163
 164 // Assume starting without pause
 165 void TransportCommand::set_playback_range(EDL *edl,
 166         int use_inout, int toggle_audio, int use_displacement)
 167 {
 168         if(!edl) edl = this->edl;
 169
 170         double length = edl->tracks->total_playable_length();
 171         double frame_period = 1.0 / edl->session->frame_rate;
 172         double start = edl->local_session->get_selectionstart(1);
 173         double end = edl->local_session->get_selectionend(1);
 174
 175         displacement = 0;
 176         if( use_inout ) {
 177                 if( edl->local_session->inpoint_valid() )
 178                         start_position = edl->local_session->get_inpoint();
 179                 if( edl->local_session->outpoint_valid() )
 180                         end_position = edl->local_session->get_outpoint();
 181         }
 182         else if( !EQUIV(start, end) ) {
 183                 start_position = start;
 184                 end_position = end;
 185         }
 186         else {
 187                 switch( command ) {
 188                 case SLOW_FWD:
 189                 case FAST_FWD:
 190                 case NORMAL_FWD: {
 191                         start_position = start;
 192                         end_position = length;
 193 // this prevents a crash if start position is after the loop when playing forwards
 194                         if( edl->local_session->loop_playback &&
 195                             start_position > edl->local_session->loop_end ) {
 196                                 start_position = edl->local_session->loop_start;
 197                         }
 198                         break; }
 199
 200                 case SLOW_REWIND:
 201                 case FAST_REWIND:
 202                 case NORMAL_REWIND:
 203                         end_position = end;
 204                         start_position = 0;
 205 // this prevents a crash if start position is before the loop when playing backwards
 206                         if( edl->local_session->loop_playback &&
 207                             end_position <= edl->local_session->loop_start ) {
 208                                         end_position = edl->local_session->loop_end;
 209                         }
 210                         break;
 211
 212                 case CURRENT_FRAME:
 213                 case SINGLE_FRAME_FWD:
 214                         start_position = start;
 215                         end_position = start_position + frame_period;
 216                         break;
 217
 218                 case SINGLE_FRAME_REWIND:
 219                         end_position = end;
 220                         start_position = end_position - frame_period;
 221                         break;
 222                 }
 223
 224                 if( use_displacement && command != CURRENT_FRAME &&
 225                     get_direction() == PLAY_FORWARD ) {
 226                         start_position += frame_period;
 227                         end_position += frame_period;
 228                         displacement = 1;
 229                 }
 230         }
 231
 232         playbackstart = get_direction() == PLAY_FORWARD ? start_position : end_position;
 233         audio_toggle = toggle_audio;
 234 }
 235
 236 void TransportCommand::playback_range_adjust_inout()
 237 {
 238         if(edl->local_session->inpoint_valid() ||
 239                 edl->local_session->outpoint_valid())
 240         {
 241                 playback_range_inout();
 242         }
 243 }
 244
 245 void TransportCommand::playback_range_inout()
 246 {
 247         if(edl->local_session->inpoint_valid())
 248                 start_position = edl->local_session->get_inpoint();
 249         else
 250                 start_position = 0;
 251
 252         if(edl->local_session->outpoint_valid())
 253                 end_position = edl->local_session->get_outpoint();
 254         else
 255                 end_position = edl->tracks->total_playable_length();
 256 }
 257
 258 void TransportCommand::playback_range_project()
 259 {
 260         start_position = 0;
 261         end_position = edl->tracks->total_playable_length();
 262 }
 263
 264 void TransportCommand::playback_range_1frame()
 265 {
 266         start_position = end_position = edl->local_session->get_selectionstart(1);
 267         if( edl->session->frame_rate > 0 ) end_position += 1./edl->session->frame_rate;
 268 }
 269
 270
 271 TransportQue::TransportQue()
 272 {
 273         input_lock = new Condition(1, "TransportQue::input_lock");
 274         output_lock = new Condition(0, "TransportQue::output_lock", 1);
 275 }
 276
 277 TransportQue::~TransportQue()
 278 {
 279         delete input_lock;
 280         delete output_lock;
 281 }
 282
 283 int TransportQue::send_command(int command, int change_type,
 284                 EDL *new_edl, int realtime, int resume,
 285                 int use_inout, int toggle_audio, int use_displacement)
 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,
 313                         use_inout, toggle_audio, use_displacement);
 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 }