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 "tracks.h"
  30 #include "transportque.h"
  31
  32 TransportCommand::TransportCommand()
  33 {
  34 // In rendering we want a master EDL so settings don't get clobbered
  35 // in the middle of a job.
  36         edl = new EDL;
  37         edl->create_objects();
  38         command = 0;
  39         change_type = 0;
  40         reset();
  41 }
  42
  43 TransportCommand::~TransportCommand()
  44 {
  45         edl->Garbage::remove_user();
  46 }
  47
  48 void TransportCommand::reset()
  49 {
  50         playbackstart = 0;
  51         start_position = 0;
  52         end_position = 0;
  53         infinite = 0;
  54         realtime = 0;
  55         resume = 0;
  56         toggle_audio = 0;
  57         loop_play = 0;
  58         speed = 0;
  59 // Don't reset the change type for commands which don't perform the change
  60         if(command != STOP) change_type = 0;
  61         command = COMMAND_NONE;
  62 }
  63
  64 EDL* TransportCommand::get_edl()
  65 {
  66         return edl;
  67 }
  68
  69 void TransportCommand::delete_edl()
  70 {
  71         edl->Garbage::remove_user();
  72         edl = 0;
  73 }
  74
  75 void TransportCommand::new_edl()
  76 {
  77         edl = new EDL;
  78         edl->create_objects();
  79 }
  80
  81
  82 void TransportCommand::copy_from(TransportCommand *command)
  83 {
  84         this->command = command->command;
  85         this->change_type = command->change_type;
  86         this->edl->copy_all(command->edl);
  87         this->start_position = command->start_position;
  88         this->end_position = command->end_position;
  89         this->playbackstart = command->playbackstart;
  90         this->realtime = command->realtime;
  91         this->resume = command->resume;
  92         this->toggle_audio = command->toggle_audio;
  93         this->loop_play = command->loop_play;
  94         this->displacement = command->displacement;
  95         this->speed = command->speed;
  96 }
  97
  98 TransportCommand& TransportCommand::operator=(TransportCommand &command)
  99 {
 100         copy_from(&command);
 101         return *this;
 102 }
 103
 104 int TransportCommand::single_frame(int command)
 105 {
 106         return (command == SINGLE_FRAME_FWD || command == SINGLE_FRAME_REWIND ||
 107                 command == CURRENT_FRAME || command == LAST_FRAME);
 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         case LAST_FRAME:
 125                 return PLAY_REVERSE;
 126
 127         default:
 128                 break;
 129         }
 130         return PLAY_FORWARD;
 131 }
 132
 133 float TransportCommand::get_speed(int command, float speed)
 134 {
 135         switch(command) {
 136         case SLOW_FWD:
 137         case SLOW_REWIND:
 138                 return speed ? speed : 0.5;
 139
 140         case NORMAL_FWD:
 141         case NORMAL_REWIND:
 142         case SINGLE_FRAME_FWD:
 143         case SINGLE_FRAME_REWIND:
 144         case CURRENT_FRAME:
 145         case LAST_FRAME:
 146                 return 1.;
 147
 148         case FAST_FWD:
 149         case FAST_REWIND:
 150                 return speed ? speed : 2.;
 151         }
 152
 153         return 0.;
 154 }
 155
 156 // Assume starting without pause
 157 void TransportCommand::set_playback_range(EDL *edl, int use_inout, int do_displacement)
 158 {
 159         if( !edl ) edl = this->edl;
 160         double length = edl->tracks->total_playable_length();
 161         double frame_period = 1.0 / edl->session->frame_rate;
 162         displacement = 0;
 163
 164         start_position = use_inout && edl->local_session->inpoint_valid() ?
 165                 edl->local_session->get_inpoint() :
 166                 !loop_play ? edl->local_session->get_selectionstart(1) : 0;
 167         end_position = use_inout && edl->local_session->outpoint_valid() ?
 168                 edl->local_session->get_outpoint() :
 169                 !loop_play ? edl->local_session->get_selectionend(1) : length;
 170
 171         if( !use_inout && EQUIV(start_position, end_position) ) {
 172 // starting play at or past end_position, play to end_position of media (for mixers)
 173                 if( start_position >= length )
 174                         length = edl->tracks->total_length();
 175                 switch( command ) {
 176                 case SLOW_FWD:
 177                 case FAST_FWD:
 178                 case NORMAL_FWD: {
 179                         end_position = length;
 180 // this prevents a crash if start_position position is after the loop when playing forwards
 181                         if( edl->local_session->loop_playback &&
 182                             start_position > edl->local_session->loop_end ) {
 183                                 start_position = edl->local_session->loop_start;
 184                         }
 185                         break; }
 186
 187                 case SLOW_REWIND:
 188                 case FAST_REWIND:
 189                 case NORMAL_REWIND:
 190                         start_position = 0;
 191 // this prevents a crash if start_position position is before the loop when playing backwards
 192                         if( edl->local_session->loop_playback &&
 193                             end_position <= edl->local_session->loop_start ) {
 194                                         end_position = edl->local_session->loop_end;
 195                         }
 196                         break;
 197
 198                 case CURRENT_FRAME:
 199                 case LAST_FRAME:
 200                 case SINGLE_FRAME_FWD:
 201                         end_position = start_position + frame_period;
 202                         break;
 203
 204                 case SINGLE_FRAME_REWIND:
 205                         start_position = end_position - frame_period;
 206                         break;
 207                 }
 208
 209                 if( realtime && do_displacement ) {
 210                         if( (command != CURRENT_FRAME && get_direction() == PLAY_FORWARD ) ||
 211                             (command != LAST_FRAME    && get_direction() == PLAY_REVERSE ) ) {
 212                                 start_position += frame_period;
 213                                 end_position += frame_period;
 214                                 displacement = 1;
 215                         }
 216                 }
 217         }
 218
 219 //      if( start_position < 0 )
 220 //              start_position = 0;
 221 //      if( end_position > length )
 222 //              end_position = length;
 223         if( end_position < start_position )
 224                 end_position = start_position;
 225
 226         playbackstart = get_direction() == PLAY_FORWARD ?
 227                 start_position : end_position;
 228 }
 229
 230 void TransportCommand::playback_range_adjust_inout()
 231 {
 232         if(edl->local_session->inpoint_valid() ||
 233                 edl->local_session->outpoint_valid())
 234         {
 235                 playback_range_inout();
 236         }
 237 }
 238
 239 void TransportCommand::playback_range_inout()
 240 {
 241         if(edl->local_session->inpoint_valid())
 242                 start_position = edl->local_session->get_inpoint();
 243         else
 244                 start_position = 0;
 245
 246         if(edl->local_session->outpoint_valid())
 247                 end_position = edl->local_session->get_outpoint();
 248         else {
 249                 end_position = edl->tracks->total_playable_length();
 250                 if( start_position >= end_position )
 251                         end_position = edl->tracks->total_length();
 252         }
 253 }
 254
 255 void TransportCommand::playback_range_project()
 256 {
 257         start_position = 0;
 258         end_position = edl->tracks->total_playable_length();
 259 }
 260
 261 void TransportCommand::playback_range_1frame()
 262 {
 263         start_position = end_position = edl->local_session->get_selectionstart(1);
 264         if( edl->session->frame_rate > 0 ) end_position += 1./edl->session->frame_rate;
 265 }
 266
 267