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         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 ||
 105                 command == SINGLE_FRAME_REWIND ||
 106                 command == CURRENT_FRAME);
 107 }
 108 int TransportCommand::single_frame()
 109 {
 110         return single_frame(command);
 111 }
 112
 113
 114 int TransportCommand::get_direction(int command)
 115 {
 116         switch(command) {
 117         case SINGLE_FRAME_FWD:
 118         case NORMAL_FWD:
 119         case FAST_FWD:
 120         case SLOW_FWD:
 121         case CURRENT_FRAME:
 122                 return PLAY_FORWARD;
 123
 124         case SINGLE_FRAME_REWIND:
 125         case NORMAL_REWIND:
 126         case FAST_REWIND:
 127         case SLOW_REWIND:
 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                 return 1.;
 153
 154         case FAST_FWD:
 155         case FAST_REWIND:
 156                 return 2.;
 157         }
 158
 159         return 0.;
 160 }
 161 float TransportCommand::get_speed()
 162 {
 163         return get_speed(command);
 164 }
 165
 166 // Assume starting without pause
 167 void TransportCommand::set_playback_range(EDL *edl,
 168         int use_inout, int toggle_audio, int loop_play, int use_displacement)
 169 {
 170         if(!edl) edl = this->edl;
 171         double length = edl->tracks->total_playable_length();
 172         double frame_period = 1.0 / edl->session->frame_rate;
 173
 174         displacement = 0;
 175         audio_toggle = toggle_audio;
 176         play_loop = loop_play;
 177
 178         start_position = use_inout && edl->local_session->inpoint_valid() ?
 179                 edl->local_session->get_inpoint() :
 180                 !loop_play ? edl->local_session->get_selectionstart(1) : 0;
 181         end_position = use_inout && edl->local_session->outpoint_valid() ?
 182                 edl->local_session->get_outpoint() :
 183                 !loop_play ? edl->local_session->get_selectionend(1) : length;
 184
 185         if( !use_inout && EQUIV(start_position, end_position) ) {
 186 // starting play at or past end_position, play to end_position of media (for mixers)
 187                 if( start_position >= length )
 188                         length = edl->tracks->total_length();
 189                 switch( command ) {
 190                 case SLOW_FWD:
 191                 case FAST_FWD:
 192                 case NORMAL_FWD: {
 193                         end_position = length;
 194 // this prevents a crash if start_position position is after the loop when playing forwards
 195                         if( edl->local_session->loop_playback &&
 196                             start_position > edl->local_session->loop_end ) {
 197                                 start_position = edl->local_session->loop_start;
 198                         }
 199                         break; }
 200
 201                 case SLOW_REWIND:
 202                 case FAST_REWIND:
 203                 case NORMAL_REWIND:
 204                         start_position = 0;
 205 // this prevents a crash if start_position 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                         end_position = start_position + frame_period;
 215                         break;
 216
 217                 case SINGLE_FRAME_REWIND:
 218                         start_position = end_position - frame_period;
 219                         break;
 220                 }
 221
 222                 if( use_displacement && command != CURRENT_FRAME &&
 223                     get_direction() == PLAY_FORWARD ) {
 224                         start_position += frame_period;
 225                         end_position += frame_period;
 226                         displacement = 1;
 227                 }
 228         }
 229
 230         if( end_position < start_position )
 231                 end_position = start_position;
 232
 233         playbackstart = get_direction() == PLAY_FORWARD ?
 234                 start_position : end_position;
 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                 if( start_position >= end_position )
 258                         end_position = edl->tracks->total_length();
 259         }
 260 }
 261
 262 void TransportCommand::playback_range_project()
 263 {
 264         start_position = 0;
 265         end_position = edl->tracks->total_playable_length();
 266 }
 267
 268 void TransportCommand::playback_range_1frame()
 269 {
 270         start_position = end_position = edl->local_session->get_selectionstart(1);
 271         if( edl->session->frame_rate > 0 ) end_position += 1./edl->session->frame_rate;
 272 }
 273
 274
 275 TransportQue::TransportQue()
 276 {
 277         input_lock = new Condition(1, "TransportQue::input_lock");
 278         output_lock = new Condition(0, "TransportQue::output_lock", 1);
 279 }
 280
 281 TransportQue::~TransportQue()
 282 {
 283         delete input_lock;
 284         delete output_lock;
 285 }
 286
 287 int TransportQue::send_command(int command, int change_type,
 288                 EDL *new_edl, int realtime, int resume, int use_inout,
 289                 int toggle_audio, int loop_play, int use_displacement)
 290 {
 291         input_lock->lock("TransportQue::send_command 1");
 292         this->command.command = command;
 293 // Mutually exclusive operation
 294         this->command.change_type |= change_type;
 295         this->command.realtime = realtime;
 296         this->command.resume = resume;
 297
 298         if(new_edl)
 299         {
 300 // Just change the EDL if the change requires it because renderengine
 301 // structures won't point to the new EDL otherwise and because copying the
 302 // EDL for every cursor movement is slow.
 303                 if(change_type == CHANGE_EDL ||
 304                         (uint32_t)change_type == CHANGE_ALL)
 305                 {
 306 // Copy EDL
 307                         this->command.get_edl()->copy_all(new_edl);
 308                 }
 309                 else
 310                 if(change_type == CHANGE_PARAMS)
 311                 {
 312                         this->command.get_edl()->synchronize_params(new_edl);
 313                 }
 314
 315 // Set playback range
 316                 this->command.set_playback_range(new_edl, use_inout,
 317                                 toggle_audio, loop_play, use_displacement);
 318         }
 319
 320         input_lock->unlock();
 321
 322         output_lock->unlock();
 323         return 0;
 324 }
 325
 326 void TransportQue::update_change_type(int change_type)
 327 {
 328         input_lock->lock("TransportQue::update_change_type");
 329         this->command.change_type |= change_type;
 330         input_lock->unlock();
 331 }