cinelerra-5.1/cinelerra/cache.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 "asset.h"
  23 #include "assets.h"
  24 #include "bcsignals.h"
  25 #include "cache.h"
  26 #include "condition.h"
  27 #include "datatype.h"
  28 #include "edl.h"
  29 #include "edlsession.h"
  30 #include "file.h"
  31 #include "filesystem.h"
  32 #include "mutex.h"
  33 #include "thread.h"
  34 #include "preferences.h"
  35
  36 #include <string.h>
  37
  38 // edl came from a command which won't exist anymore
  39 CICache::CICache(Preferences *preferences)
  40  : Garbage("CICache"), List<CICacheItem>()
  41 {
  42         this->preferences = preferences;
  43         edl = 0;
  44         check_out_lock = new Condition(0, "CICache::check_out_lock", 0);
  45         total_lock = new Mutex("CICache::total_lock");
  46         check_outs = 0;
  47 }
  48
  49 CICache::~CICache()
  50 {
  51         while(last)
  52         {
  53                 CICacheItem *item = last;
  54 //printf("CICache::~CICache: %s\n", item->asset->path);
  55                 remove_pointer(item);
  56                 item->Garbage::remove_user();
  57         }
  58         delete check_out_lock;
  59         delete total_lock;
  60 }
  61
  62
  63
  64
  65
  66
  67 File* CICache::check_out(Asset *asset, EDL *edl, int block)
  68 {
  69         CICacheItem *current = 0;
  70         long tid = (long)Thread::get_self();
  71         if( !tid ) tid = 1;
  72         total_lock->lock("CICache::check_out");
  73         add_user();
  74
  75         while( users > 1 ) {
  76                 File *file = 0;
  77 // Scan directory for item
  78                 current = first;
  79                 while(current && strcmp(current->asset->path, asset->path) != 0)
  80                         current = NEXT;
  81                 if(!current) { // Create new item
  82                         current = new CICacheItem(this, edl, asset);
  83                         append(current);  current->checked_out = tid;
  84                         total_lock->unlock();
  85                         file = current->file;
  86                         int result = file->open_file(preferences, asset, 1, 0);
  87                         if( result ) { delete file; file = 0; }
  88                         total_lock->lock("CICache::check_out 2");
  89                         if( !file ) {
  90                                 remove_pointer(current);
  91                                 current->file = 0;
  92                                 current->Garbage::remove_user();
  93                                 current = 0;
  94                         }
  95                         else
  96                                 current->Garbage::add_user();
  97                 }
  98                 else {
  99                         file = current->file;
 100                         if( !current->checked_out ) {
 101 // Return existing/new item
 102                                 current->Garbage::add_user();
 103                                 current->age = EDL::next_id();
 104                                 current->checked_out = tid;
 105                         }
 106                         else if( current->checked_out == tid )
 107                                 ++check_outs;
 108                         else
 109                                 current = 0;
 110                 }
 111                 if( current || !file || !block ) break;
 112 // Try again after blocking
 113                 total_lock->unlock();
 114                 check_out_lock->lock("CICache::check_out");
 115                 total_lock->lock("CICache::check_out");
 116         }
 117
 118 // cache deleted during checkout, destroy this
 119         if( users == 1 ) {
 120                 remove_user();
 121                 return 0;
 122         }
 123         //printf("users: %i \n", users );
 124         remove_user();
 125         total_lock->unlock();
 126 //printf("check out %p %lx %s\n", current, tid, asset->path);
 127         return current ? current->file : 0;
 128 }
 129
 130 int CICache::check_in(Asset *asset)
 131 {
 132         total_lock->lock("CICache::check_in");
 133         CICacheItem *current = 0;
 134         if( !check_outs ) {
 135                 current = first;
 136                 while(current && strcmp(current->asset->path, asset->path) != 0)
 137                         current = NEXT;
 138                 if(current && current->checked_out) {
 139                         current->checked_out = 0;
 140                         current->Garbage::remove_user();
 141                 }
 142         }
 143         else
 144                 --check_outs;
 145         total_lock->unlock();
 146
 147 // Release for blocking check_out operations
 148         check_out_lock->unlock();
 149 //printf("check  in %p %lx %s\n", current, (long)Thread::get_self(), asset->path);
 150         age();
 151         return 0;
 152 }
 153
 154 void CICache::remove_all()
 155 {
 156         List<CICacheItem> removed;
 157         for(;;) {
 158                 total_lock->lock("CICache::remove_all");
 159                 CICacheItem *current = first;
 160                 while( current ) {
 161                         CICacheItem *next_item = current->next;
 162                         if( !current->checked_out ) {
 163                                 remove_pointer(current);
 164                                 removed.append(current);
 165                         }
 166                         current = next_item;
 167                 }
 168                 total_lock->unlock();
 169                 while( removed.first ) {
 170                         CICacheItem *current = removed.first;
 171                         removed.remove_pointer(current);
 172                         current->Garbage::remove_user();
 173                 }
 174                 if( !first ) break;
 175                 check_out_lock->lock();
 176         }
 177 }
 178
 179 int CICache::delete_entry(char *path)
 180 {
 181         CICacheItem *current = 0;
 182         for( ;; ) {
 183                 total_lock->lock("CICache::delete_entry");
 184                 current = first;
 185                 while( current && strcmp(current->asset->path, path) !=0 )
 186                         current = NEXT;
 187                 if( !current ) break;
 188                 if( !current->checked_out ) {
 189                         remove_pointer(current);
 190                         break;
 191                 }
 192                 total_lock->unlock();
 193                 check_out_lock->lock();
 194         }
 195         total_lock->unlock();
 196         if( current )
 197                 current->Garbage::remove_user();
 198         return 0;
 199 }
 200
 201 int CICache::delete_entry(Asset *asset)
 202 {
 203         return delete_entry(asset->path);
 204 }
 205
 206 int CICache::age()
 207 {
 208 // delete old assets if memory usage is exceeded
 209         int64_t prev_memory_usage = 0;
 210         int result = 0;
 211         while( !result ) {
 212                 int64_t memory_usage = get_memory_usage(1);
 213                 if( prev_memory_usage == memory_usage ) break;
 214                 if( preferences->cache_size >= memory_usage ) break;
 215 //printf("CICache::age 3 %p %jd %jd\n", this, memory_usage, preferences->cache_size);
 216                 prev_memory_usage = memory_usage;
 217                 result = delete_oldest();
 218         }
 219         return result;
 220 }
 221
 222 int64_t CICache::get_memory_usage(int use_lock)
 223 {
 224         CICacheItem *current;
 225         int64_t result = 0;
 226         if(use_lock) total_lock->lock("CICache::get_memory_usage");
 227         for(current = first; current; current = NEXT)
 228         {
 229                 File *file = current->file;
 230                 if(file) result += file->get_memory_usage();
 231         }
 232         if(use_lock) total_lock->unlock();
 233         return result;
 234 }
 235
 236 int CICache::get_oldest()
 237 {
 238         CICacheItem *current;
 239         int oldest = 0x7fffffff;
 240         total_lock->lock("CICache::get_oldest");
 241         for(current = last; current; current = PREVIOUS)
 242         {
 243                 if(current->age < oldest)
 244                 {
 245                         oldest = current->age;
 246                 }
 247         }
 248         total_lock->unlock();
 249
 250         return oldest;
 251 }
 252
 253 int CICache::delete_oldest()
 254 {
 255         int result = 0;
 256         CICacheItem *oldest = 0;
 257         total_lock->lock("CICache::delete_oldest");
 258         if( first != last ) { // at least 2
 259                 CICacheItem *current = first;
 260                 for( ; !oldest && current; current=current->next )
 261                         if( !current->checked_out ) oldest = current;
 262                 for( ; current; current=current->next ) {
 263                         if( current->checked_out ) continue;
 264                         if( current->age < oldest->age )
 265                                 oldest = current;
 266                 }
 267 // delete oldest of at least 2 cache files
 268                 if( oldest ) {
 269                         remove_pointer(oldest);
 270                         result = 1;
 271                 }
 272         }
 273 // settle for just deleting one frame
 274         else if( first && !first->checked_out )
 275                 result = first->file->delete_oldest();
 276         total_lock->unlock();
 277         if( oldest )
 278                 oldest->Garbage::remove_user();
 279         return result;
 280 }
 281
 282 void CICache::dump(FILE *fp)
 283 {
 284         CICacheItem *current;
 285         total_lock->lock("CICache::dump");
 286         fprintf(fp, "CICache::dump total size %jd\n", get_memory_usage(0));
 287         for(current = first; current; current = NEXT)
 288         {
 289                 fprintf(fp, "cache item %p asset %p %s age=%d checked_out=%p\n",
 290                         current, current->asset, current->asset->path,
 291                         current->age, (void*)current->checked_out);
 292         }
 293         total_lock->unlock();
 294 }
 295
 296
 297 CICacheItem::CICacheItem()
 298 : Garbage("CICacheItem"), ListItem<CICacheItem>()
 299 {
 300 }
 301
 302
 303 CICacheItem::CICacheItem(CICache *cache, EDL *edl, Asset *asset)
 304  : Garbage("CICacheItem"), ListItem<CICacheItem>()
 305 {
 306         age = EDL::next_id();
 307
 308         this->asset = new Asset;
 309
 310         item_lock = new Condition(1, "CICacheItem::item_lock", 0);
 311
 312
 313 // Must copy Asset since this belongs to an EDL which won't exist forever.
 314         this->asset->copy_from(asset, 1);
 315         this->cache = cache;
 316         checked_out = 0;
 317
 318         file = new File;
 319         int cpus = cache->preferences->processors;
 320         file->set_processors(cpus);
 321         file->set_preload(edl->session->playback_preload);
 322         file->set_subtitle(edl->session->decode_subtitles ?
 323                 edl->session->subtitle_number : -1);
 324         file->set_program(edl->session->program_no);
 325         file->set_interpolate_raw(edl->session->interpolate_raw);
 326         file->set_white_balance_raw(edl->session->white_balance_raw);
 327
 328 SET_TRACE
 329 }
 330
 331 CICacheItem::~CICacheItem()
 332 {
 333         if(file) delete file;
 334         if(asset) asset->Garbage::remove_user();
 335         if(item_lock) delete item_lock;
 336 }