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         displacement = 0;
  59         speed = 0;
  60 // Don't reset the change type for commands which don't perform the change
  61         if(command != STOP) change_type = 0;
  62         command = COMMAND_NONE;
  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->toggle_audio = command->toggle_audio;
  94         this->loop_play = command->loop_play;
  95         this->displacement = command->displacement;
  96         this->speed = command->speed;
  97 }
  98
  99 TransportCommand& TransportCommand::operator=(TransportCommand &command)
 100 {
 101         copy_from(&command);
 102         return *this;
 103 }
 104
 105 int TransportCommand::single_frame(int command)
 106 {
 107         return (command == SINGLE_FRAME_FWD || command == SINGLE_FRAME_REWIND ||
 108                 command == CURRENT_FRAME || command == LAST_FRAME);
 109 }
 110
 111 int TransportCommand::get_direction(int command)
 112 {
 113         switch(command) {
 114         case SINGLE_FRAME_FWD:
 115         case NORMAL_FWD:
 116         case FAST_FWD:
 117         case SLOW_FWD:
 118         case CURRENT_FRAME:
 119                 return PLAY_FORWARD;
 120
 121         case SINGLE_FRAME_REWIND:
 122         case NORMAL_REWIND:
 123         case FAST_REWIND:
 124         case SLOW_REWIND:
 125         case LAST_FRAME:
 126                 return PLAY_REVERSE;
 127
 128         default:
 129                 break;
 130         }
 131         return PLAY_FORWARD;
 132 }
 133
 134 float TransportCommand::get_speed(int command, float speed)
 135 {
 136         switch(command) {
 137         case SLOW_FWD:
 138         case SLOW_REWIND:
 139                 return speed ? speed : 0.5;
 140
 141         case NORMAL_FWD:
 142         case NORMAL_REWIND:
 143         case SINGLE_FRAME_FWD:
 144         case SINGLE_FRAME_REWIND:
 145         case CURRENT_FRAME:
 146         case LAST_FRAME:
 147                 return 1.;
 148
 149         case FAST_FWD:
 150         case FAST_REWIND:
 151                 return speed ? speed : 2.;
 152         }
 153
 154         return 0.;
 155 }
 156
 157 // Assume starting without pause
 158 void TransportCommand::set_playback_range(EDL *edl, int use_inout, int do_displacement)
 159 {
 160         if( !edl ) edl = this->edl;
 161         double length = edl->tracks->total_playable_length();
 162         double frame_period = 1.0 / edl->session->frame_rate;
 163         displacement = 0;
 164
 165         start_position = use_inout && edl->local_session->inpoint_valid() ?
 166                 edl->local_session->get_inpoint() :
 167                 !loop_play ? edl->local_session->get_selectionstart(1) : 0;
 168         end_position = use_inout && edl->local_session->outpoint_valid() ?
 169                 edl->local_session->get_outpoint() :
 170                 !loop_play ? edl->local_session->get_selectionend(1) : length;
 171
 172         if( !use_inout && EQUIV(start_position, end_position) ) {
 173 // starting play at or past end_position, play to end_position of media (for mixers)
 174                 if( start_position >= length )
 175                         length = edl->tracks->total_length();
 176                 switch( command ) {
 177                 case SLOW_FWD:
 178                 case FAST_FWD:
 179                 case NORMAL_FWD: {
 180                         end_position = length;
 181 // this prevents a crash if start_position position is after the loop when playing forwards
 182                         if( edl->local_session->loop_playback &&
 183                             start_position > edl->local_session->loop_end ) {
 184                                 start_position = edl->local_session->loop_start;
 185                         }
 186                         break; }
 187
 188                 case SLOW_REWIND:
 189                 case FAST_REWIND:
 190                 case NORMAL_REWIND:
 191                         start_position = 0;
 192 // this prevents a crash if start_position position is before the loop when playing backwards
 193                         if( edl->local_session->loop_playback &&
 194                             end_position <= edl->local_session->loop_start ) {
 195                                         end_position = edl->local_session->loop_end;
 196                         }
 197                         break;
 198
 199                 case CURRENT_FRAME:
 200                 case LAST_FRAME:
 201                 case SINGLE_FRAME_FWD:
 202                         end_position = start_position + frame_period;
 203                         break;
 204
 205                 case SINGLE_FRAME_REWIND:
 206                         start_position = end_position - frame_period;
 207                         break;
 208                 }
 209
 210                 if( realtime && do_displacement ) {
 211                         if( (command != CURRENT_FRAME && get_direction() == PLAY_FORWARD ) ||
 212                             (command != LAST_FRAME    && get_direction() == PLAY_REVERSE ) ) {
 213                                 start_position += frame_period;
 214                                 end_position += frame_period;
 215                                 displacement = 1;
 216                         }
 217                 }
 218         }
 219
 220 //      if( start_position < 0 )
 221 //              start_position = 0;
 222 //      if( end_position > length )
 223 //              end_position = length;
 224         if( end_position < start_position )
 225                 end_position = start_position;
 226
 227         playbackstart = get_direction() == PLAY_FORWARD ?
 228                 start_position : end_position;
 229 }
 230
 231 void TransportCommand::playback_range_adjust_inout()
 232 {
 233         if(edl->local_session->inpoint_valid() ||
 234                 edl->local_session->outpoint_valid())
 235         {
 236                 playback_range_inout();
 237         }
 238 }
 239
 240 void TransportCommand::playback_range_inout()
 241 {
 242         if(edl->local_session->inpoint_valid())
 243                 start_position = edl->local_session->get_inpoint();
 244         else
 245                 start_position = 0;
 246
 247         if(edl->local_session->outpoint_valid())
 248                 end_position = edl->local_session->get_outpoint();
 249         else {
 250                 end_position = edl->tracks->total_playable_length();
 251                 if( start_position >= end_position )
 252                         end_position = edl->tracks->total_length();
 253         }
 254 }
 255
 256 void TransportCommand::playback_range_project()
 257 {
 258         start_position = 0;
 259         end_position = edl->tracks->total_playable_length();
 260 }
 261
 262 void TransportCommand::playback_range_1frame()
 263 {
 264         start_position = end_position = edl->local_session->get_selectionstart(1);
 265         if( edl->session->frame_rate > 0 ) end_position += 1./edl->session->frame_rate;
 266 }
 267
 268