cinelerra-5.1/cinelerra/indexfile.C

   1
   2 /*
   3  * CINELERRA
   4  * Copyright (C) 1997-2014 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 "arender.h"
  23 #include "asset.h"
  24 #include "bcsignals.h"
  25 #include "bctimer.h"
  26 #include "cache.h"
  27 #include "clip.h"
  28 #include "condition.h"
  29 #include "edit.h"
  30 #include "edl.h"
  31 #include "edlsession.h"
  32 #include "errorbox.h"
  33 #include "file.h"
  34 #include "filesystem.h"
  35 #include "filexml.h"
  36 #include "indexable.h"
  37 #include "indexfile.h"
  38 #include "indexstate.h"
  39 #include "indexthread.h"
  40 #include "language.h"
  41 #include "localsession.h"
  42 #include "mainprogress.h"
  43 #include "mwindowgui.h"
  44 #include "mwindow.h"
  45 #include "preferences.h"
  46 #include "removefile.h"
  47 #include "renderengine.h"
  48 #include "resourcepixmap.h"
  49 #include "samples.h"
  50 #include "theme.h"
  51 #include "timelinepane.h"
  52 #include "trackcanvas.h"
  53 #include "tracks.h"
  54 #include "transportque.h"
  55 #include "vframe.h"
  56
  57
  58 #include <stdio.h>
  59 #include <stdlib.h>
  60 #include <stdint.h>
  61 #include <unistd.h>
  62 #include <string.h>
  63 #include <errno.h>
  64 #include <fcntl.h>
  65 #include <ctype.h>
  66
  67 #include <sys/types.h>
  68 #include <sys/stat.h>
  69 #include <linux/iso_fs.h>
  70
  71 // check for isofs volume_id for dvd/cdrom
  72
  73 static int udf_volume_id(const char *path, char *fname)
  74 {
  75         struct stat st;
  76         if( stat(path,&st) ) return 1;
  77         // search mounted devices
  78         FILE *fp = fopen("/proc/mounts","r");
  79         if( !fp ) return 1;
  80
  81         int result = 1;
  82         while( result && !feof(fp) && !ferror(fp) ) {
  83                 char devpath[BCTEXTLEN], mpath[BCTEXTLEN];
  84                 char options[BCTEXTLEN], line[BCTEXTLEN];
  85                 char fstype[64], zero1[16], zero2[16];
  86                 if( !fgets(&line[0], sizeof(line)-1, fp) ) break;
  87                 int n = sscanf(&line[0], "%s %s %s %s %s %s\n",
  88                          devpath, mpath, fstype, options, zero1, zero2);
  89                 if( n != 6 ) continue;
  90                 // check udf filesystems
  91                 if( strcmp(fstype,"udf") != 0 ) continue;
  92                 struct stat dst;
  93                 if( stat(devpath,&dst) ) continue;
  94                 if( st.st_dev != dst.st_rdev ) continue;
  95                 int fd = open(devpath,O_RDONLY);
  96                 if( fd < 0 ) continue;
  97                 struct iso_primary_descriptor id;
  98                 if( lseek(fd,0x8000,SEEK_SET) == 0x8000 )
  99                         n = read(fd,&id,sizeof(id));
 100                 close(fd);
 101                 if( n != sizeof(id) ) continue;
 102                 // look for magic number
 103                 if( strncmp(ISO_STANDARD_ID,id.id,sizeof(id.id)) ) continue;
 104                 // look for volume_id
 105                 if( !isalnum(id.volume_id[0]) ) continue;
 106                 char *bp = (char*)&id.volume_id[0], *cp = fname;
 107                 for( int i=0; i<(int)sizeof(id.volume_id); ++i ) *cp++ = *bp++;
 108                 while( --cp>=fname && *cp==' ' ) *cp = 0;
 109                 if( !*fname ) continue;
 110                 // fname = volume_id _ creation_date
 111                 ++cp;  *cp++ = '_';  bp = (char*)&id.creation_date[0];
 112                 for( int i=0; i<(int)sizeof(id.creation_date)-1; ++i ) {
 113                         if( !isdigit(*bp) ) break;
 114                         *cp++ = *bp++;
 115                 }
 116                 *cp++ = 0;
 117                 if( cp-fname > 4 ) result = 0;
 118         }
 119
 120         fclose(fp);
 121         return result;
 122 }
 123
 124 // Use native sampling rates for files so the same index can be used in
 125 // multiple projects.
 126
 127 IndexFile::IndexFile(MWindow *mwindow)
 128 {
 129 //printf("IndexFile::IndexFile 1\n");
 130         reset();
 131         this->mwindow = mwindow;
 132 //printf("IndexFile::IndexFile 2\n");
 133         redraw_timer = new Timer;
 134 }
 135
 136 IndexFile::IndexFile(MWindow *mwindow,
 137         Indexable *indexable)
 138 {
 139 //printf("IndexFile::IndexFile 2\n");
 140         reset();
 141         this->mwindow = mwindow;
 142         this->indexable = indexable;
 143         redraw_timer = new Timer;
 144         if(indexable)
 145         {
 146                 indexable->add_user();
 147                 source_channels = indexable->get_audio_channels();
 148                 source_samplerate = indexable->get_sample_rate();
 149                 source_length = indexable->get_audio_samples();
 150         }
 151 }
 152
 153 IndexFile::~IndexFile()
 154 {
 155 //printf("IndexFile::~IndexFile 1\n");
 156         delete redraw_timer;
 157         if(indexable) indexable->remove_user();
 158         close_source();
 159 }
 160
 161 void IndexFile::reset()
 162 {
 163         fd = 0;
 164         source = 0;
 165         interrupt_flag = 0;
 166         source_length = 0;
 167         source_channels = 0;
 168         indexable = 0;
 169         render_engine = 0;
 170         cache = 0;
 171 }
 172
 173 IndexState* IndexFile::get_state()
 174 {
 175         IndexState *index_state = 0;
 176         if(indexable) index_state = indexable->index_state;
 177         return index_state;
 178 }
 179
 180
 181
 182 int IndexFile::open_index()
 183 {
 184         IndexState *index_state = 0;
 185         int result = 0;
 186
 187 // use buffer if being built
 188         index_state = get_state();
 189
 190         if(index_state->index_status == INDEX_BUILDING)
 191         {
 192 // use buffer
 193                 result = 0;
 194         }
 195         else
 196         if(!(result = open_file()))
 197         {
 198 // opened existing file
 199                 if(read_info())
 200                 {
 201                         result = 1;
 202                         close_index();
 203                 }
 204                 else
 205                 {
 206                         index_state->index_status = INDEX_READY;
 207                 }
 208         }
 209         else
 210         {
 211                 result = 1;
 212         }
 213
 214         return result;
 215 }
 216
 217 void IndexFile::delete_index(Preferences *preferences,
 218         Indexable *indexable, const char *suffix)
 219 {
 220         char index_filename[BCTEXTLEN];
 221         char source_filename[BCTEXTLEN];
 222         const char *path = indexable->path;
 223
 224         get_index_filename(source_filename,
 225                 preferences->index_directory,
 226                 index_filename, path, suffix);
 227 //printf("IndexFile::delete_index %s %s\n", source_filename, index_filename);
 228         remove_file(index_filename);
 229 }
 230
 231 int IndexFile::open_file()
 232 {
 233         int result = 0;
 234         const int debug = 0;
 235         const char *path = indexable->path;
 236
 237
 238 //printf("IndexFile::open_file %f\n", indexable->get_frame_rate());
 239
 240         get_index_filename(source_filename,
 241                 mwindow->preferences->index_directory,
 242                 index_filename,
 243                 path);
 244
 245         if(debug) printf("IndexFile::open_file %d index_filename=%s\n",
 246                 __LINE__,
 247                 index_filename);
 248         fd = fopen(index_filename, "rb");
 249         if( fd != 0 )
 250         {
 251 // Index file already exists.
 252 // Get its last size without changing the real asset status.
 253                 Indexable *test_indexable = new Indexable(0);
 254                 if(indexable)
 255                         test_indexable->copy_indexable(indexable);
 256                 read_info(test_indexable);
 257                 IndexState *index_state = test_indexable->index_state;
 258
 259                 FileSystem fs;
 260                 if(fs.get_date(index_filename) < fs.get_date(test_indexable->path))
 261                 {
 262                         if(debug) printf("IndexFile::open_file %d index_date=%jd source_date=%jd\n",
 263                                 __LINE__,
 264                                 fs.get_date(index_filename),
 265                                 fs.get_date(test_indexable->path));
 266
 267 // index older than source
 268                         result = 2;
 269                         fclose(fd);
 270                         fd = 0;
 271                 }
 272                 else
 273                 if(fs.get_size(test_indexable->path) != index_state->index_bytes)
 274                 {
 275 // source file is a different size than index source file
 276                         if(debug) printf("IndexFile::open_file %d index_size=%jd source_size=%jd\n",
 277                                 __LINE__,
 278                                 index_state->index_bytes,
 279                                 fs.get_size(test_indexable->path));
 280                         result = 2;
 281                         fclose(fd);
 282                         fd = 0;
 283                 }
 284                 else
 285                 {
 286                         if(debug) printf("IndexFile::open_file %d\n",
 287                                 __LINE__);
 288                         fseek(fd, 0, SEEK_END);
 289                         file_length = ftell(fd);
 290                         fseek(fd, 0, SEEK_SET);
 291                         result = 0;
 292                 }
 293                 test_indexable->Garbage::remove_user();
 294         }
 295         else
 296         {
 297 // doesn't exist
 298                 if(debug) printf("IndexFile::open_file %d index_filename=%s doesn't exist\n",
 299                         __LINE__,
 300                         index_filename);
 301                 result = 1;
 302         }
 303
 304         return result;
 305 }
 306
 307 int IndexFile::open_source()
 308 {
 309 //printf("IndexFile::open_source %p %s\n", asset, asset->path);
 310         int result = 0;
 311         if(indexable && indexable->is_asset)
 312         {
 313                 if(!source) source = new File;
 314
 315                 Asset *asset = (Asset*)indexable;
 316                 if(source->open_file(mwindow->preferences,
 317                         asset, 1, 0))
 318                 {
 319                         //printf("IndexFile::open_source() Couldn't open %s.\n", asset->path);
 320                         result = 1;
 321                 }
 322                 else
 323                 {
 324                         FileSystem fs;
 325                         asset->index_state->index_bytes = fs.get_size(asset->path);
 326                         source_length = source->get_audio_length();
 327                 }
 328         }
 329         else
 330         {
 331                 TransportCommand command;
 332                 command.command = NORMAL_FWD;
 333                 command.get_edl()->copy_all((EDL*)indexable);
 334                 command.change_type = CHANGE_ALL;
 335                 command.realtime = 0;
 336                 cache = new CICache(mwindow->preferences);
 337                 render_engine = new RenderEngine(0,
 338                         mwindow->preferences, 0, 0);
 339                 render_engine->set_acache(cache);
 340                 render_engine->arm_command(&command);
 341                 FileSystem fs;
 342                 indexable->index_state->index_bytes = fs.get_size(indexable->path);
 343         }
 344
 345         return result;
 346 }
 347
 348 void IndexFile::close_source()
 349 {
 350         delete source;
 351         source = 0;
 352
 353         delete render_engine;
 354         render_engine = 0;
 355
 356         delete cache;
 357         cache = 0;
 358 }
 359
 360 int64_t IndexFile::get_required_scale()
 361 {
 362         int64_t result = 1;
 363
 364
 365 // get scale of index file
 366 // Total peaks which may be stored in buffer
 367         int64_t peak_count = mwindow->preferences->index_size /
 368                 (2 * sizeof(float) * source_channels);
 369         for(result = 1;
 370                 source_length / result > peak_count;
 371                 result *= 2)
 372                 ;
 373
 374 // Takes too long to draw from source on a CDROM.  Make indexes for
 375 // everything.
 376
 377         return result;
 378 }
 379
 380 int IndexFile::get_index_filename(char *source_filename,
 381         char *index_directory,
 382         char *index_filename,
 383         const char *input_filename,
 384         const char *suffix)
 385 {
 386         const char *input_fn = input_filename;
 387         char volume_id[BCTEXTLEN];
 388 // Replace mount/directory with volume_id if isofs
 389         if( !udf_volume_id(input_filename, volume_id) )
 390         {
 391                 char *cp = strrchr((char*)input_filename,'/');
 392                 if( cp ) input_fn = cp + 1;
 393                 for( cp=volume_id; *cp; ++cp );
 394                 *cp++ = '_';  strcpy(cp, input_fn);
 395                 input_fn = volume_id;
 396         }
 397 // Replace slashes and dots
 398         int i, j;
 399         int len = strlen(input_fn);
 400         for(i = 0, j = 0; i < len; i++)
 401         {
 402                 if(input_fn[i] != '/' &&
 403                         input_fn[i] != '.')
 404                         source_filename[j++] = input_fn[i];
 405                 else
 406                 {
 407                         if(i > 0)
 408                                 source_filename[j++] = '_';
 409                 }
 410         }
 411         source_filename[j] = 0;
 412         FileSystem fs;
 413         fs.join_names(index_filename, index_directory, source_filename);
 414         strcat(index_filename, suffix ? suffix : ".idx");
 415         return 0;
 416 }
 417
 418 int IndexFile::interrupt_index()
 419 {
 420         interrupt_flag = 1;
 421         return 0;
 422 }
 423
 424 // Read data into buffers
 425
 426 int IndexFile::create_index(MainProgressBar *progress)
 427 {
 428         int result = 0;
 429 SET_TRACE
 430
 431         interrupt_flag = 0;
 432
 433 // open the source file
 434         if(open_source()) return 1;
 435         source_channels = indexable->get_audio_channels();
 436         source_samplerate = indexable->get_sample_rate();
 437         source_length = indexable->get_audio_samples();
 438
 439 SET_TRACE
 440
 441         get_index_filename(source_filename,
 442                 mwindow->preferences->index_directory,
 443                 index_filename,
 444                 indexable->path);
 445
 446 SET_TRACE
 447
 448 // Some file formats have their own sample index.
 449 // Test for index in stream table of contents
 450         if(source && !source->get_index(this, progress))
 451         {
 452                 IndexState *index_state = get_state();
 453                 index_state->index_status = INDEX_READY;
 454                 redraw_edits(1);
 455         }
 456         else
 457 // Build index from scratch
 458         {
 459 SET_TRACE
 460
 461 // Indexes are now built for everything since it takes too long to draw
 462 // from CDROM source.
 463
 464 // get amount to read at a time in floats
 465                 int64_t buffersize = 65536;
 466                 char string[BCTEXTLEN];
 467                 sprintf(string, _("Creating %s."), index_filename);
 468
 469                 progress->update_title(string);
 470                 progress->update_length(source_length);
 471                 redraw_timer->update();
 472 SET_TRACE
 473
 474 // thread out index thread
 475                 IndexThread *index_thread = new IndexThread(mwindow,
 476                         this,
 477                         index_filename,
 478                         buffersize,
 479                         source_length);
 480                 index_thread->start_build();
 481
 482 // current sample in source file
 483                 int64_t position = 0;
 484                 int64_t fragment_size = buffersize;
 485                 int current_buffer = 0;
 486
 487
 488 // pass through file once
 489 // printf("IndexFile::create_index %d source_length=%jd source=%p progress=%p\n",
 490 // __LINE__,
 491 // source_length,
 492 // source,
 493 // progress);
 494 SET_TRACE
 495                 while(position < source_length && !result)
 496                 {
 497 SET_TRACE
 498                         if(source_length - position < fragment_size && fragment_size == buffersize) fragment_size = source_length - position;
 499
 500                         index_thread->input_lock[current_buffer]->lock("IndexFile::create_index 1");
 501                         index_thread->input_len[current_buffer] = fragment_size;
 502
 503 SET_TRACE
 504                         int cancelled = progress->update(position);
 505 //printf("IndexFile::create_index cancelled=%d\n", cancelled);
 506 SET_TRACE
 507                         if(cancelled ||
 508                                 index_thread->interrupt_flag ||
 509                                 interrupt_flag)
 510                         {
 511                                 result = 3;
 512                         }
 513
 514
 515 SET_TRACE
 516                         if(source && !result)
 517                         {
 518 SET_TRACE
 519                                 for(int channel = 0;
 520                                         !result && channel < source_channels;
 521                                         channel++)
 522                                 {
 523 // Read from source file
 524                                         source->set_audio_position(position);
 525                                         source->set_channel(channel);
 526
 527                                         if(source->read_samples(
 528                                                 index_thread->buffer_in[current_buffer][channel],
 529                                                 fragment_size))
 530                                                 result = 1;
 531                                 }
 532 SET_TRACE
 533                         }
 534                         else
 535                         if(render_engine && !result)
 536                         {
 537 SET_TRACE
 538                                 if(render_engine->arender)
 539                                 {
 540                                         result = render_engine->arender->process_buffer(
 541                                                 index_thread->buffer_in[current_buffer],
 542                                                 fragment_size,
 543                                                 position);
 544                                 }
 545                                 else
 546                                 {
 547                                         for(int i = 0; i < source_channels; i++)
 548                                         {
 549                                                 bzero(index_thread->buffer_in[current_buffer][i]->get_data(),
 550                                                         fragment_size * sizeof(double));
 551                                         }
 552                                 }
 553 SET_TRACE
 554                         }
 555 SET_TRACE
 556
 557 // Release buffer to thread
 558                         if(!result)
 559                         {
 560                                 index_thread->output_lock[current_buffer]->unlock();
 561                                 current_buffer++;
 562                                 if(current_buffer >= TOTAL_INDEX_BUFFERS) current_buffer = 0;
 563                                 position += fragment_size;
 564                         }
 565                         else
 566                         {
 567                                 index_thread->input_lock[current_buffer]->unlock();
 568                         }
 569 SET_TRACE
 570                 }
 571
 572
 573 // end thread cleanly
 574                 index_thread->input_lock[current_buffer]->lock("IndexFile::create_index 2");
 575                 index_thread->last_buffer[current_buffer] = 1;
 576                 index_thread->output_lock[current_buffer]->unlock();
 577                 index_thread->stop_build();
 578
 579
 580                 delete index_thread;
 581
 582         }
 583
 584
 585
 586         close_source();
 587
 588
 589
 590         open_index();
 591
 592         close_index();
 593
 594         mwindow->edl->set_index_file(indexable);
 595         return 0;
 596 }
 597
 598
 599
 600 int IndexFile::redraw_edits(int force)
 601 {
 602         int64_t difference = redraw_timer->get_scaled_difference(1000);
 603
 604         if(difference > 250 || force)
 605         {
 606                 redraw_timer->update();
 607                 mwindow->gui->lock_window("IndexFile::redraw_edits");
 608                 mwindow->edl->set_index_file(indexable);
 609                 mwindow->gui->draw_indexes(indexable);
 610                 mwindow->gui->unlock_window();
 611         }
 612         return 0;
 613 }
 614
 615
 616
 617
 618 int IndexFile::draw_index(
 619         TrackCanvas *canvas,
 620         ResourcePixmap *pixmap,
 621         Edit *edit,
 622         int x,
 623         int w)
 624 {
 625         const int debug = 0;
 626         IndexState *index_state = get_state();
 627         int pane_number = canvas->pane->number;
 628 //index_state->dump();
 629
 630 SET_TRACE
 631         if(debug) printf("IndexFile::draw_index %d\n", __LINE__);
 632         if(index_state->index_zoom == 0)
 633         {
 634                 printf(_("IndexFile::draw_index: index has 0 zoom\n"));
 635                 return 0;
 636         }
 637         if(debug) printf("IndexFile::draw_index %d\n", __LINE__);
 638
 639 // test channel number
 640         if(edit->channel > source_channels) return 1;
 641         if(debug) printf("IndexFile::draw_index %d source_samplerate=%d "
 642                         "w=%d samplerate=%jd zoom_sample=%jd\n",
 643                 __LINE__, source_samplerate, w,
 644                 mwindow->edl->session->sample_rate,
 645                 mwindow->edl->local_session->zoom_sample);
 646
 647 // calculate a virtual x where the edit_x should be in floating point
 648         double virtual_edit_x = 1.0 *
 649                 edit->track->from_units(edit->startproject) *
 650                 mwindow->edl->session->sample_rate /
 651                 mwindow->edl->local_session->zoom_sample -
 652                 mwindow->edl->local_session->view_start[pane_number];
 653
 654 // samples in segment to draw relative to asset
 655         double asset_over_session = (double)source_samplerate /
 656                 mwindow->edl->session->sample_rate;
 657         int64_t startsource = (int64_t)(((pixmap->pixmap_x - virtual_edit_x + x) *
 658                 mwindow->edl->local_session->zoom_sample +
 659                 edit->startsource) *
 660                 asset_over_session);
 661 // just in case we get a numerical error
 662         if (startsource < 0) startsource = 0;
 663         int64_t length = (int64_t)(w *
 664                 mwindow->edl->local_session->zoom_sample *
 665                 asset_over_session);
 666         int64_t lengthindex = length / index_state->index_zoom * 2;
 667         int64_t startindex = startsource / index_state->index_zoom * 2;
 668 // length of index to read in floats
 669 // length of index available in floats
 670         int64_t endindex = index_state->index_status == INDEX_BUILDING ?
 671                 index_state->get_channel_used(edit->channel) * 2 :
 672                 index_state->get_index_size(edit->channel);
 673 // Clamp length of index to read by available data
 674         if(startindex + lengthindex >= endindex )
 675                 lengthindex = endindex - startindex;
 676         if( lengthindex <= 0 ) return 0;
 677
 678 // Actual length read from file in bytes
 679         int64_t length_read;
 680 // Start and length of fragment to read from file in bytes.
 681         int64_t startfile, lengthfile;
 682         float *buffer = 0;
 683         int buffer_shared = 0;
 684         int center_pixel = mwindow->edl->local_session->zoom_track / 2;
 685         if( mwindow->edl->session->show_titles )
 686                 center_pixel += mwindow->theme->get_image("title_bg_data")->get_h();
 687         //int miny = center_pixel - mwindow->edl->local_session->zoom_track / 2;
 688         //int maxy = center_pixel + mwindow->edl->local_session->zoom_track / 2;
 689         int x1 = 0, y1, y2;
 690 // get zoom_sample relative to index zoomx
 691         double index_frames_per_pixel = mwindow->edl->local_session->zoom_sample /
 692                 index_state->index_zoom *
 693                 asset_over_session;
 694
 695
 696
 697         if(index_state->index_status == INDEX_BUILDING)
 698         {
 699 // index is in RAM, being built
 700                 buffer = index_state->get_channel_buffer(edit->channel);
 701                 if( !buffer ) return 0;
 702                 buffer += startindex;
 703                 buffer_shared = 1;
 704         }
 705         else
 706         {
 707 // add channel offset
 708                 startindex += index_state->get_index_offset(edit->channel);
 709 // index is stored in a file
 710                 buffer = new float[lengthindex + 1];
 711                 buffer_shared = 0;
 712                 startfile = index_state->index_start + startindex * sizeof(float);
 713                 lengthfile = lengthindex * sizeof(float);
 714                 length_read = 0;
 715
 716                 if(startfile < file_length)
 717                 {
 718                         fseek(fd, startfile, SEEK_SET);
 719
 720                         length_read = lengthfile;
 721                         if(startfile + length_read > file_length)
 722                                 length_read = file_length - startfile;
 723
 724                         (void)fread(buffer, length_read + sizeof(float), 1, fd);
 725                 }
 726
 727                 if(length_read < lengthfile) {
 728                         int pos = length_read / sizeof(float);
 729                         int file_length = lengthfile / sizeof(float);
 730                         while( pos < file_length ) buffer[pos++] = 0;
 731                 }
 732         }
 733
 734         canvas->set_color(mwindow->theme->audio_color);
 735
 736         double current_frame = 0;
 737         float highsample = buffer[0];
 738         float lowsample = buffer[1];
 739         int prev_y1 = center_pixel;
 740         int prev_y2 = center_pixel;
 741         int first_frame = 1;
 742         int zoom_y = mwindow->edl->local_session->zoom_y, zoom_y2 = zoom_y / 2;
 743         int max_y = center_pixel + zoom_y2 - 1;
 744 SET_TRACE
 745
 746         for(int bufferposition = 0;
 747                 bufferposition < lengthindex;
 748                 bufferposition += 2)
 749         {
 750                 if(current_frame >= index_frames_per_pixel)
 751                 {
 752
 753                         int y1 = (int)(center_pixel - highsample * zoom_y2);
 754                         int y2 = (int)(center_pixel - lowsample * zoom_y2);
 755                         CLAMP(y1, 0, max_y);  int next_y1 = y1;
 756                         CLAMP(y2, 0, max_y);  int next_y2 = y2;
 757 //printf("draw_line (%f,%f) = %d,%d,  %d,%d\n", lowsample, highsample, x1 + x, y1, x1 + x, y2);
 758
 759 //SET_TRACE
 760 // A different algorithm has to be used if it's 1 sample per pixel and the
 761 // index is used.  Now the min and max values are equal so we join the max samples.
 762                         if(mwindow->edl->local_session->zoom_sample == 1)
 763                         {
 764                                 canvas->draw_line(x1 + x - 1, prev_y1, x1 + x, y1, pixmap);
 765                         }
 766                         else
 767                         {
 768 // Extend line height if it doesn't connect to previous line
 769                                 if(!first_frame)
 770                                 {
 771                                         if(y1 > prev_y2) y1 = prev_y2 + 1;
 772                                         if(y2 < prev_y1) y2 = prev_y1 - 1;
 773                                 }
 774                                 else
 775                                 {
 776                                         first_frame = 0;
 777                                 }
 778
 779
 780
 781                                 canvas->draw_line(x1 + x, y1, x1 + x, y2, pixmap);
 782                         }
 783                         current_frame -= index_frames_per_pixel;
 784                         x1++;
 785                         prev_y1 = next_y1;
 786                         prev_y2 = next_y2;
 787                         highsample = buffer[bufferposition];
 788                         lowsample = buffer[bufferposition + 1];
 789                 }
 790
 791                 current_frame++;
 792                 highsample = MAX(highsample, buffer[bufferposition]);
 793                 lowsample = MIN(lowsample, buffer[bufferposition + 1]);
 794         }
 795 SET_TRACE
 796
 797 // Get last column
 798         if(current_frame)
 799         {
 800                 y1 = (int)(center_pixel - highsample * zoom_y2);
 801                 y2 = (int)(center_pixel - lowsample * zoom_y2);
 802                 canvas->draw_line(x1 + x, y1, x1 + x, y2, pixmap);
 803         }
 804
 805 SET_TRACE
 806
 807
 808
 809         if(!buffer_shared) delete [] buffer;
 810 SET_TRACE
 811         if(debug) printf("IndexFile::draw_index %d\n", __LINE__);
 812         return 0;
 813 }
 814
 815 int IndexFile::close_index()
 816 {
 817         if(fd)
 818         {
 819                 fclose(fd);
 820                 fd = 0;
 821         }
 822         return 0;
 823 }
 824
 825 int IndexFile::remove_index()
 826 {
 827         IndexState *index_state = get_state();
 828         if(index_state->index_status == INDEX_READY ||
 829                 index_state->index_status == INDEX_NOTTESTED)
 830         {
 831                 close_index();
 832                 remove(index_filename);
 833         }
 834         return 0;
 835 }
 836
 837 int IndexFile::read_info(Indexable *test_indexable)
 838 {
 839         const int debug = 0;
 840
 841 // Store format in actual asset.
 842 // If it's a nested EDL, we never want the format, just the index info.
 843         if(!test_indexable) test_indexable = indexable;
 844         if(!test_indexable) return 1;
 845
 846         IndexState * index_state = test_indexable->index_state;
 847         if(index_state->index_status == INDEX_NOTTESTED)
 848         {
 849 // read start of index data
 850                 int temp = fread((char*)&(index_state->index_start), sizeof(int64_t), 1, fd);
 851 //printf("IndexFile::read_info %d %f\n", __LINE__, test_indexable->get_frame_rate());
 852
 853                 if(!temp) return 1;
 854 // read test_indexable info from index
 855                 char *data;
 856
 857                 data = new char[index_state->index_start];
 858                 temp = fread(data, index_state->index_start - sizeof(int64_t), 1, fd);
 859                 if(!temp) return 1;
 860
 861                 data[index_state->index_start - sizeof(int64_t)] = 0;
 862                 FileXML xml;
 863                 xml.read_from_string(data);
 864                 delete [] data;
 865
 866
 867
 868 // Read the file format & index state.
 869                 if(test_indexable->is_asset)
 870                 {
 871                         Asset *test_asset = (Asset *)test_indexable;
 872                         Asset *asset = new Asset;
 873                         asset->read(&xml);
 874                         int ret = 0;
 875 //printf("IndexFile::read_info %d %f\n", __LINE__, asset->get_frame_rate());
 876
 877                         if( asset->format == FILE_UNKNOWN ||
 878                             test_asset->format != asset->format ) {
 879 if(debug) printf("IndexFile::read_info %d\n", __LINE__);
 880                                 ret = 1;
 881                         }
 882                         asset->remove_user();
 883                         if( ret ) return ret;
 884                 }
 885                 else
 886                 {
 887 // Read only the index state for a nested EDL
 888                         int result = 0;
 889 if(debug) printf("IndexFile::read_info %d\n", __LINE__);
 890                         while(!result)
 891                         {
 892                                 result = xml.read_tag();
 893                                 if(!result)
 894                                 {
 895                                         if(xml.tag.title_is("INDEX"))
 896                                         {
 897                                                 index_state->read_xml(&xml, source_channels);
 898 if(debug) printf("IndexFile::read_info %d\n", __LINE__);
 899 if(debug) index_state->dump();
 900                                                 result = 1;
 901                                         }
 902                                 }
 903                         }
 904                 }
 905         }
 906
 907         return 0;
 908 }
 909
 910
 911
 912
 913
 914
 915
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