cinelerra-5.0/guicast/bcrepeater.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 "bcdisplay.h"
  23 #include "bcrepeater.h"
  24 #include "bcsignals.h"
  25 #include "bcwindow.h"
  26 #include "condition.h"
  27
  28 #include <unistd.h>
  29
  30 BC_Repeater::BC_Repeater(BC_WindowBase *window, long delay)
  31  : Thread(1, 0, 0)
  32 {
  33         pause_lock = new Condition(0, "BC_Repeater::pause_lock");
  34         startup_lock = new Condition(0, "BC_Repeater::startup_lock");
  35         repeat_lock = new Condition(1, "BC_Repeater::repeat_lock");
  36         repeating = 0;
  37         interrupted = 0;
  38         this->delay = delay;
  39         windows.append(window);
  40
  41 }
  42
  43 BC_Repeater::~BC_Repeater()
  44 {
  45         interrupted = 1;
  46         pause_lock->unlock();
  47         repeat_lock->unlock();
  48
  49         Thread::cancel();
  50         Thread::join();
  51
  52         delete pause_lock;
  53         delete startup_lock;
  54         delete repeat_lock;
  55 }
  56
  57 void BC_Repeater::initialize()
  58 {
  59         start();
  60 // This is important.  It doesn't unblock until the thread is running.
  61         startup_lock->lock("BC_Repeater::initialize");
  62 }
  63
  64 int BC_Repeater::start_repeating()
  65 {
  66 //printf("BC_Repeater::start_repeating 1 %d\n", delay);
  67         repeating++;
  68         if(repeating == 1)
  69         {
  70 // Resume the loop
  71                 pause_lock->unlock();
  72         }
  73         return 0;
  74 }
  75
  76 int BC_Repeater::stop_repeating()
  77 {
  78 // Recursive calling happens when mouse wheel is used.
  79         if(repeating > 0)
  80         {
  81                 repeating--;
  82 // Pause the loop
  83                 if(repeating == 0) pause_lock->lock("BC_Repeater::stop_repeating");
  84         }
  85         return 0;
  86 }
  87
  88 int BC_Repeater::start_repeating(BC_WindowBase *window)
  89 {
  90 // Test if the window already exists
  91 //      for(int i = 0; i < windows.size(); i++)
  92 //      {
  93 //              if(windows.get(i) == window)
  94 //              {
  95 //                      return 0;
  96 //              }
  97 //      }
  98 //printf("BC_Repeater::start_repeating 1 %d\n", delay);
  99
 100 // Add window to users
 101         repeating++;
 102         windows.append(window);
 103         if(repeating == 1)
 104         {
 105 // Resume the loop
 106                 pause_lock->unlock();
 107         }
 108         return 0;
 109 }
 110
 111 int BC_Repeater::stop_repeating(BC_WindowBase *window)
 112 {
 113         for(int i = 0; i < windows.size(); i++)
 114         {
 115                 if(windows.get(i) == window)
 116                 {
 117 // Remove all entries of window
 118                         windows.remove_number(i);
 119                         i--;
 120 // Recursive calling happens when mouse wheel is used.
 121                         if(repeating > 0)
 122                         {
 123                                 repeating--;
 124 // Pause the loop
 125                                 if(repeating == 0)
 126                                 {
 127                                         pause_lock->lock("BC_Repeater::stop_repeating");
 128                                         return 0;
 129                                 }
 130                         }
 131                         break;
 132                 }
 133         }
 134         return 0;
 135 }
 136
 137 int BC_Repeater::stop_all_repeating(BC_WindowBase *window)
 138 {
 139         for(int i = 0; i < windows.size(); i++)
 140         {
 141                 if(windows.get(i) == window)
 142                 {
 143 // Remove all entries of window
 144                         windows.remove_number(i);
 145                         i--;
 146 // Recursive calling happens when mouse wheel is used.
 147                         if(repeating > 0)
 148                         {
 149                                 repeating--;
 150 // Pause the loop
 151                                 if(repeating == 0)
 152                                 {
 153                                         pause_lock->lock("BC_Repeater::stop_repeating");
 154                                         return 0;
 155                                 }
 156                         }
 157                 }
 158         }
 159         return 0;
 160 }
 161
 162 void BC_Repeater::run()
 163 {
 164 //printf("BC_Repeater::run 1 %d\n", getpid());
 165         next_delay = delay;
 166         Thread::disable_cancel();
 167         startup_lock->unlock();
 168
 169         while(!interrupted)
 170         {
 171                 Thread::enable_cancel();
 172                 timer.delay(next_delay);
 173                 Thread::disable_cancel();
 174 //if(next_delay <= 0) printf("BC_Repeater::run delay=%d next_delay=%d\n", delay, next_delay);
 175
 176 // Test exit conditions
 177                 if(interrupted) return;
 178 // Busy wait here
 179 //              if(repeating <= 0) continue;
 180
 181 // Test for pause
 182                 pause_lock->lock("BC_Repeater::run");
 183                 pause_lock->unlock();
 184                 timer.update();
 185
 186 // Test exit conditions
 187                 if(interrupted) return;
 188                 if(repeating <= 0) continue;
 189
 190 // Wait for existing signal to be processed before sending a new one
 191                 repeat_lock->lock("BC_Repeater::run");
 192
 193 // Test exit conditions
 194                 if(interrupted)
 195                 {
 196                         repeat_lock->unlock();
 197                         return;
 198                 }
 199                 if(repeating <= 0)
 200                 {
 201                         repeat_lock->unlock();
 202                         continue;
 203                 }
 204
 205 #ifdef SINGLE_THREAD
 206                 BC_Display::display_global->lock_display("BC_Repeater::run");
 207 // Test exit conditions again
 208                 if(interrupted)
 209                 {
 210                         repeat_lock->unlock();
 211                         BC_Display::display_global->unlock_display();
 212                         return;
 213                 }
 214                 if(repeating <= 0)
 215                 {
 216                         repeat_lock->unlock();
 217                         BC_Display::display_global->unlock_display();
 218                         continue;
 219                 }
 220
 221 // Stick event into queue
 222                 BC_Display::display_global->arm_repeat(delay);
 223                 BC_Display::display_global->unlock_display();
 224 #else
 225 // Wait for window to become available.
 226                 windows.get(0)->lock_window("BC_Repeater::run");
 227
 228 // Test exit conditions again
 229                 if(interrupted)
 230                 {
 231                         repeat_lock->unlock();
 232                         windows.get(0)->unlock_window();
 233                         return;
 234                 }
 235                 if(repeating <= 0)
 236                 {
 237                         repeat_lock->unlock();
 238                         windows.get(0)->unlock_window();
 239                         continue;
 240                 }
 241
 242 // Stick event into queue
 243                 windows.get(0)->arm_repeat(delay);
 244                 windows.get(0)->unlock_window();
 245 #endif
 246
 247
 248
 249                 next_delay = delay - timer.get_difference();
 250                 if(next_delay <= 0) next_delay = 0;
 251
 252 // Test exit conditions
 253                 if(interrupted)
 254                 {
 255                         repeat_lock->unlock();
 256                         return;
 257                 }
 258                 if(repeating <= 0)
 259                 {
 260                         repeat_lock->unlock();
 261                         continue;
 262                 }
 263         }
 264 }