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         command = COMMAND_NONE;
  51         change_type = 0;
  52         playbackstart = 0;
  53         start_position = 0;
  54         end_position = 0;
  55         infinite = 0;
  56         realtime = 0;
  57         resume = 0;
  58         locked = 0;
  59         toggle_audio = 0;
  60         loop_play = 0;
  61         displacement = 0;
  62         speed = 0;
  63 }
  64
  65 EDL* TransportCommand::get_edl()
  66 {
  67         return edl;
  68 }
  69
  70 void TransportCommand::delete_edl()
  71 {
  72         edl->Garbage::remove_user();
  73         edl = 0;
  74 }
  75
  76 void TransportCommand::new_edl()
  77 {
  78         edl = new EDL;
  79         edl->create_objects();
  80 }
  81
  82
  83 void TransportCommand::copy_from(TransportCommand *command)
  84 {
  85         this->command = command->command;
  86         this->change_type = command->change_type;
  87         this->edl->copy_all(command->edl);
  88         this->start_position = command->start_position;
  89         this->end_position = command->end_position;
  90         this->playbackstart = command->playbackstart;
  91         this->realtime = command->realtime;
  92         this->resume = command->resume;
  93         this->locked = command->locked;
  94         this->toggle_audio = command->toggle_audio;
  95         this->loop_play = command->loop_play;
  96         this->displacement = command->displacement;
  97         this->speed = command->speed;
  98 }
  99
 100 TransportCommand& TransportCommand::operator=(TransportCommand &command)
 101 {
 102         copy_from(&command);
 103         return *this;
 104 }
 105
 106 int TransportCommand::single_frame(int command)
 107 {
 108         return (command == SINGLE_FRAME_FWD || command == SINGLE_FRAME_REWIND ||
 109                 command == CURRENT_FRAME || command == LAST_FRAME);
 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         case LAST_FRAME:
 127                 return PLAY_REVERSE;
 128
 129         default:
 130                 break;
 131         }
 132         return PLAY_FORWARD;
 133 }
 134
 135 float TransportCommand::get_speed(int command, float speed)
 136 {
 137         switch(command) {
 138         case SLOW_FWD:
 139         case SLOW_REWIND:
 140                 return speed ? speed : 0.5;
 141
 142         case NORMAL_FWD:
 143         case NORMAL_REWIND:
 144         case SINGLE_FRAME_FWD:
 145         case SINGLE_FRAME_REWIND:
 146         case CURRENT_FRAME:
 147         case LAST_FRAME:
 148                 return 1.;
 149
 150         case FAST_FWD:
 151         case FAST_REWIND:
 152                 return speed ? speed : 2.;
 153         }
 154
 155         return 0.;
 156 }
 157
 158 // Assume starting without pause
 159 void TransportCommand::set_playback_range(EDL *edl, int use_inout, int do_displacement)
 160 {
 161         if( !edl ) edl = this->edl;
 162         double length = edl->tracks->total_playable_length();
 163         double frame_period = 1.0 / edl->session->frame_rate;
 164         displacement = 0;
 165
 166         start_position = use_inout && edl->local_session->inpoint_valid() ?
 167                 edl->local_session->get_inpoint() :
 168                 !loop_play ? edl->local_session->get_selectionstart(1) : 0;
 169         end_position = use_inout && edl->local_session->outpoint_valid() ?
 170                 edl->local_session->get_outpoint() :
 171                 !loop_play ? edl->local_session->get_selectionend(1) : length;
 172
 173         if( !use_inout && EQUIV(start_position, end_position) ) {
 174 // starting play at or past end_position, play to end_position of media (for mixers)
 175                 if( start_position >= length )
 176                         length = edl->tracks->total_length();
 177                 switch( command ) {
 178                 case SLOW_FWD:
 179                 case FAST_FWD:
 180                 case NORMAL_FWD: {
 181                         end_position = length;
 182 // this prevents a crash if start_position position is after the loop when playing forwards
 183                         if( edl->local_session->loop_playback &&
 184                             start_position > edl->local_session->loop_end ) {
 185                                 start_position = edl->local_session->loop_start;
 186                         }
 187                         break; }
 188
 189                 case SLOW_REWIND:
 190                 case FAST_REWIND:
 191                 case NORMAL_REWIND:
 192                         start_position = 0;
 193 // this prevents a crash if start_position position is before the loop when playing backwards
 194                         if( edl->local_session->loop_playback &&
 195                             end_position <= edl->local_session->loop_start ) {
 196                                         end_position = edl->local_session->loop_end;
 197                         }
 198                         break;
 199
 200                 case CURRENT_FRAME:
 201                 case LAST_FRAME:
 202                 case SINGLE_FRAME_FWD:
 203                         end_position = start_position + frame_period;
 204                         break;
 205
 206                 case SINGLE_FRAME_REWIND:
 207                         start_position = end_position - frame_period;
 208                         break;
 209                 }
 210
 211                 if( realtime && do_displacement ) {
 212                         if( (command != CURRENT_FRAME && get_direction() == PLAY_FORWARD ) ||
 213                             (command != LAST_FRAME    && get_direction() == PLAY_REVERSE ) ) {
 214                                 start_position += frame_period;
 215                                 end_position += frame_period;
 216                                 displacement = 1;
 217                         }
 218                 }
 219         }
 220
 221 //      if( start_position < 0 )
 222 //              start_position = 0;
 223 //      if( end_position > length )
 224 //              end_position = length;
 225         if( end_position < start_position )
 226                 end_position = start_position;
 227
 228         playbackstart = get_direction() == PLAY_FORWARD ?
 229                 start_position : end_position;
 230 }
 231
 232 void TransportCommand::playback_range_adjust_inout()
 233 {
 234         if(edl->local_session->inpoint_valid() ||
 235                 edl->local_session->outpoint_valid())
 236         {
 237                 playback_range_inout();
 238         }
 239 }
 240
 241 void TransportCommand::playback_range_inout()
 242 {
 243         if(edl->local_session->inpoint_valid())
 244                 start_position = edl->local_session->get_inpoint();
 245         else
 246                 start_position = 0;
 247
 248         if(edl->local_session->outpoint_valid())
 249                 end_position = edl->local_session->get_outpoint();
 250         else {
 251                 end_position = edl->tracks->total_playable_length();
 252                 if( start_position >= end_position )
 253                         end_position = edl->tracks->total_length();
 254         }
 255 }
 256
 257 void TransportCommand::playback_range_project()
 258 {
 259         start_position = 0;
 260         end_position = edl->tracks->total_playable_length();
 261 }
 262
 263 void TransportCommand::playback_range_1frame()
 264 {
 265         start_position = end_position = edl->local_session->get_selectionstart(1);
 266         if( edl->session->frame_rate > 0 ) end_position += 1./edl->session->frame_rate;
 267 }
 268
 269