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 "playbackengine.h"
  29 #include "preferences.h"
  30 #include "tracks.h"
  31 #include "transportque.h"
  32
  33
  34 TransportCommand::TransportCommand(Preferences *preferences)
  35 {
  36 // In rendering we want a master EDL so settings don't get clobbered
  37 // in the middle of a job.
  38         edl = new EDL;
  39         edl->create_objects();
  40         command = 0;
  41         change_type = 0;
  42         this->preferences = preferences;
  43         reset();
  44 }
  45
  46 TransportCommand::~TransportCommand()
  47 {
  48         edl->Garbage::remove_user();
  49 }
  50
  51 void TransportCommand::reset()
  52 {
  53         command = COMMAND_NONE;
  54         change_type = 0;
  55         playbackstart = 0;
  56         start_position = 0;
  57         end_position = 0;
  58         infinite = 0;
  59         realtime = 0;
  60         resume = 0;
  61         locked = 0;
  62         toggle_audio = 0;
  63         loop_play = 0;
  64         displacement = 0;
  65         speed = 0;
  66 }
  67
  68 EDL* TransportCommand::get_edl()
  69 {
  70         return edl;
  71 }
  72
  73 void TransportCommand::delete_edl()
  74 {
  75         edl->Garbage::remove_user();
  76         edl = 0;
  77 }
  78
  79 void TransportCommand::new_edl()
  80 {
  81         edl = new EDL;
  82         edl->create_objects();
  83 }
  84
  85
  86 void TransportCommand::copy_from(TransportCommand *command)
  87 {
  88         this->command = command->command;
  89         this->change_type = command->change_type;
  90         this->edl->copy_all(command->edl);
  91         this->start_position = command->start_position;
  92         this->end_position = command->end_position;
  93         this->playbackstart = command->playbackstart;
  94         this->realtime = command->realtime;
  95         this->resume = command->resume;
  96         this->locked = command->locked;
  97         this->toggle_audio = command->toggle_audio;
  98         this->loop_play = command->loop_play;
  99         this->displacement = command->displacement;
 100         this->speed = command->speed;
 101 }
 102
 103 TransportCommand& TransportCommand::operator=(TransportCommand &command)
 104 {
 105         copy_from(&command);
 106         return *this;
 107 }
 108
 109 int TransportCommand::single_frame(int command)
 110 {
 111         return (command == SINGLE_FRAME_FWD || command == SINGLE_FRAME_REWIND ||
 112                 command == CURRENT_FRAME || command == LAST_FRAME);
 113 }
 114
 115 int TransportCommand::get_direction(int command)
 116 {
 117         switch(command) {
 118         case SINGLE_FRAME_FWD:
 119         case NORMAL_FWD:
 120         case FAST_FWD:
 121         case SLOW_FWD:
 122         case CURRENT_FRAME:
 123                 return PLAY_FORWARD;
 124
 125         case SINGLE_FRAME_REWIND:
 126         case NORMAL_REWIND:
 127         case FAST_REWIND:
 128         case SLOW_REWIND:
 129         case LAST_FRAME:
 130                 return PLAY_REVERSE;
 131
 132         default:
 133                 break;
 134         }
 135         return PLAY_FORWARD;
 136 }
 137
 138 float TransportCommand::get_speed(int command, float speed)
 139 {
 140 // fast = 2.0, slow = 0.5
 141 // float my_fast_speed = 2.0;
 142 // float my_slow_speed = 0.5;
 143 float my_fast_speed = preferences->fast_speed;
 144 float my_slow_speed = preferences->slow_speed;
 145
 146         switch(command) {
 147         case SLOW_FWD:
 148         case SLOW_REWIND:
 149                 return speed ? speed : my_slow_speed;
 150
 151         case NORMAL_FWD:
 152         case NORMAL_REWIND:
 153         case SINGLE_FRAME_FWD:
 154         case SINGLE_FRAME_REWIND:
 155         case CURRENT_FRAME:
 156         case LAST_FRAME:
 157                 return 1.;
 158
 159         case FAST_FWD:
 160         case FAST_REWIND:
 161                 return speed ? speed : my_fast_speed;
 162         }
 163
 164         return 0.;
 165 }
 166
 167 // Assume starting without pause
 168 void TransportCommand::set_playback_range(EDL *edl, int use_inout, int do_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         displacement = 0;
 174
 175         start_position = use_inout && edl->local_session->inpoint_valid() ?
 176                 edl->local_session->get_inpoint() :
 177                 !loop_play ? edl->local_session->get_selectionstart(1) : 0;
 178         end_position = use_inout && edl->local_session->outpoint_valid() ?
 179                 edl->local_session->get_outpoint() :
 180                 !loop_play ? edl->local_session->get_selectionend(1) : length;
 181         if( start_position >= length )
 182                 length = edl->tracks->total_length();
 183
 184         if( command == REWIND ) {
 185                 start_position = end_position = 0;
 186                 command = CURRENT_FRAME;
 187         }
 188         else if( command == GOTO_END ) {
 189                 start_position = end_position = length;
 190                 command = LAST_FRAME;
 191         }
 192         else if( !use_inout && EQUIV(start_position, end_position) ) {
 193 // starting play at or past end_position, play to end_position of media (for mixers)
 194                 switch( command ) {
 195                 case SLOW_FWD:
 196                 case FAST_FWD:
 197                 case NORMAL_FWD: {
 198                         end_position = length;
 199 // this prevents a crash if start_position position is after the loop when playing forwards
 200                         if( edl->local_session->loop_playback &&
 201                             start_position > edl->local_session->loop_end ) {
 202                                 start_position = edl->local_session->loop_start;
 203                         }
 204                         displacement = realtime && do_displacement ? frame_period : 0;
 205                         break; }
 206
 207                 case SLOW_REWIND:
 208                 case FAST_REWIND:
 209                 case NORMAL_REWIND:
 210                         start_position = 0;
 211 // this prevents a crash if start_position position is before the loop when playing backwards
 212                         if( edl->local_session->loop_playback &&
 213                             end_position <= edl->local_session->loop_start ) {
 214                                         end_position = edl->local_session->loop_end;
 215                         }
 216                         break;
 217
 218                 case SINGLE_FRAME_FWD:
 219                         displacement = realtime && do_displacement ? frame_period : 0;
 220                 case CURRENT_FRAME:
 221                 case LAST_FRAME:
 222                         end_position = start_position + frame_period;
 223                         break;
 224
 225                 case SINGLE_FRAME_REWIND:
 226                         start_position = end_position - frame_period;
 227                         break;
 228                 }
 229                 start_position += displacement;
 230                 end_position += displacement;
 231         }
 232 //      if( start_position < 0 )
 233 //              start_position = 0;
 234 //      if( end_position > length )
 235 //              end_position = length;
 236         if( end_position < start_position )
 237                 end_position = start_position;
 238
 239         playbackstart = get_direction() == PLAY_FORWARD ?
 240                 start_position : end_position;
 241 }
 242
 243 void TransportCommand::playback_range_adjust_inout()
 244 {
 245         if(edl->local_session->inpoint_valid() ||
 246                 edl->local_session->outpoint_valid())
 247         {
 248                 playback_range_inout();
 249         }
 250 }
 251
 252 void TransportCommand::playback_range_inout()
 253 {
 254         if(edl->local_session->inpoint_valid())
 255                 start_position = edl->local_session->get_inpoint();
 256         else
 257                 start_position = 0;
 258
 259         if(edl->local_session->outpoint_valid())
 260                 end_position = edl->local_session->get_outpoint();
 261         else {
 262                 end_position = edl->tracks->total_playable_length();
 263                 if( start_position >= end_position )
 264                         end_position = edl->tracks->total_length();
 265         }
 266 }
 267
 268 void TransportCommand::playback_range_project()
 269 {
 270         start_position = 0;
 271         end_position = edl->tracks->total_playable_length();
 272 }
 273
 274 void TransportCommand::playback_range_1frame()
 275 {
 276         start_position = end_position = edl->local_session->get_selectionstart(1);
 277         if( edl->session->frame_rate > 0 ) end_position += 1./edl->session->frame_rate;
 278 }
 279
 280