cinelerra-5.0/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 "format.inc"
  37 #include "indexable.h"
  38 #include "indexfile.h"
  39 #include "indexstate.h"
  40 #include "indexthread.h"
  41 #include "language.h"
  42 #include "localsession.h"
  43 #include "mainprogress.h"
  44 #include "mwindowgui.h"
  45 #include "mwindow.h"
  46 #include "preferences.h"
  47 #include "removefile.h"
  48 #include "renderengine.h"
  49 #include "resourcepixmap.h"
  50 #include "samples.h"
  51 #include "theme.h"
  52 #include "timelinepane.h"
  53 #include "trackcanvas.h"
  54 #include "tracks.h"
  55 #include "transportque.h"
  56 #include "vframe.h"
  57
  58
  59 #include <stdio.h>
  60 #include <stdlib.h>
  61 #include <stdint.h>
  62 #include <unistd.h>
  63 #include <string.h>
  64 #include <errno.h>
  65 #include <fcntl.h>
  66 #include <ctype.h>
  67
  68 #include <sys/types.h>
  69 #include <sys/stat.h>
  70 #include <linux/iso_fs.h>
  71
  72 // check for isofs volume_id for dvd/cdrom
  73
  74 static int udf_volume_id(const char *path, char *fname)
  75 {
  76         struct stat st;
  77         if( stat(path,&st) ) return 1;
  78         // search mounted devices
  79         FILE *fp = fopen("/proc/mounts","r");
  80         if( !fp ) return 1;
  81
  82         int result = 1;
  83         while( result && !feof(fp) && !ferror(fp) ) {
  84                 char devpath[BCTEXTLEN], mpath[BCTEXTLEN];
  85                 char options[BCTEXTLEN], line[BCTEXTLEN];
  86                 char fstype[64], zero1[16], zero2[16];
  87                 if( !fgets(&line[0], sizeof(line)-1, fp) ) break;
  88                 int n = sscanf(&line[0], "%s %s %s %s %s %s\n",
  89                          devpath, mpath, fstype, options, zero1, zero2);
  90                 if( n != 6 ) continue;
  91                 // check udf filesystems
  92                 if( strcmp(fstype,"udf") != 0 ) continue;
  93                 struct stat dst;
  94                 if( stat(devpath,&dst) ) continue;
  95                 if( st.st_dev != dst.st_rdev ) continue;
  96                 int fd = open(devpath,O_RDONLY);
  97                 if( fd < 0 ) continue;
  98                 struct iso_primary_descriptor id;
  99                 if( lseek(fd,0x8000,SEEK_SET) == 0x8000 )
 100                         n = read(fd,&id,sizeof(id));
 101                 close(fd);
 102                 if( n != sizeof(id) ) continue;
 103                 // look for magic number
 104                 if( strncmp(ISO_STANDARD_ID,id.id,sizeof(id.id)) ) continue;
 105                 // look for volume_id
 106                 if( !isalnum(id.volume_id[0]) ) continue;
 107                 char *bp = &id.volume_id[0], *cp = fname;
 108                 for( int i=0; i<(int)sizeof(id.volume_id); ++i ) *cp++ = *bp++;
 109                 while( --cp>=fname && *cp==' ' ) *cp = 0;
 110                 if( !*fname ) continue;
 111                 // fname = volume_id _ creation_date
 112                 ++cp;  *cp++ = '_';  bp = &id.creation_date[0];
 113                 for( int i=0; i<(int)sizeof(id.creation_date)-1; ++i ) {
 114                         if( !isdigit(*bp) ) break;
 115                         *cp++ = *bp++;
 116                 }
 117                 *cp++ = 0;
 118                 if( cp-fname > 4 ) result = 0;
 119         }
 120
 121         fclose(fp);
 122         return result;
 123 }
 124
 125 // Use native sampling rates for files so the same index can be used in
 126 // multiple projects.
 127
 128 IndexFile::IndexFile(MWindow *mwindow)
 129 {
 130 //printf("IndexFile::IndexFile 1\n");
 131         reset();
 132         this->mwindow = mwindow;
 133 //printf("IndexFile::IndexFile 2\n");
 134         redraw_timer = new Timer;
 135 }
 136
 137 IndexFile::IndexFile(MWindow *mwindow,
 138         Indexable *indexable)
 139 {
 140 //printf("IndexFile::IndexFile 2\n");
 141         reset();
 142         this->mwindow = mwindow;
 143         this->indexable = indexable;
 144         redraw_timer = new Timer;
 145
 146         if(indexable)
 147         {
 148                 indexable->add_user();
 149                 source_channels = indexable->get_audio_channels();
 150                 source_samplerate = indexable->get_sample_rate();
 151                 source_length = indexable->get_audio_samples();
 152         }
 153 }
 154
 155 IndexFile::~IndexFile()
 156 {
 157 //printf("IndexFile::~IndexFile 1\n");
 158         delete redraw_timer;
 159         if(indexable) indexable->remove_user();
 160         close_source();
 161 }
 162
 163 void IndexFile::reset()
 164 {
 165         fd = 0;
 166         source = 0;
 167         interrupt_flag = 0;
 168         source_length = 0;
 169         source_channels = 0;
 170         indexable = 0;
 171         render_engine = 0;
 172         cache = 0;
 173 }
 174
 175 IndexState* IndexFile::get_state()
 176 {
 177         IndexState *index_state = 0;
 178         if(indexable) index_state = indexable->index_state;
 179         return index_state;
 180 }
 181
 182
 183
 184 int IndexFile::open_index()
 185 {
 186         IndexState *index_state = 0;
 187         int result = 0;
 188
 189 // use buffer if being built
 190         index_state = get_state();
 191
 192         if(index_state->index_status == INDEX_BUILDING)
 193         {
 194 // use buffer
 195                 result = 0;
 196         }
 197         else
 198         if(!(result = open_file()))
 199         {
 200 // opened existing file
 201                 if(read_info())
 202                 {
 203                         result = 1;
 204                         close_index();
 205                 }
 206                 else
 207                 {
 208                         index_state->index_status = INDEX_READY;
 209                 }
 210         }
 211         else
 212         {
 213                 result = 1;
 214         }
 215
 216         return result;
 217 }
 218
 219 void IndexFile::delete_index(Preferences *preferences,
 220         Indexable *indexable, const char *suffix)
 221 {
 222         char index_filename[BCTEXTLEN];
 223         char source_filename[BCTEXTLEN];
 224         const char *path = indexable->path;
 225
 226         get_index_filename(source_filename,
 227                 preferences->index_directory,
 228                 index_filename, path, suffix);
 229 //printf("IndexFile::delete_index %s %s\n", source_filename, index_filename);
 230         remove_file(index_filename);
 231 }
 232
 233 int IndexFile::open_file()
 234 {
 235         int result = 0;
 236         const int debug = 0;
 237         const char *path = indexable->path;
 238
 239
 240 //printf("IndexFile::open_file %f\n", indexable->get_frame_rate());
 241
 242         get_index_filename(source_filename,
 243                 mwindow->preferences->index_directory,
 244                 index_filename,
 245                 path);
 246
 247         if(debug) printf("IndexFile::open_file %d index_filename=%s\n",
 248                 __LINE__,
 249                 index_filename);
 250         fd = fopen(index_filename, "rb");
 251         if( fd != 0 )
 252         {
 253 // Index file already exists.
 254 // Get its last size without changing the real asset status.
 255                 Indexable *test_indexable = new Indexable(0);
 256                 if(indexable)
 257                         test_indexable->copy_indexable(indexable);
 258                 read_info(test_indexable);
 259                 IndexState *index_state = test_indexable->index_state;
 260
 261                 FileSystem fs;
 262                 if(fs.get_date(index_filename) < fs.get_date(test_indexable->path))
 263                 {
 264                         if(debug) printf("IndexFile::open_file %d index_date=" _LD " source_date=" _LD "\n",
 265                                 __LINE__,
 266                                 fs.get_date(index_filename),
 267                                 fs.get_date(test_indexable->path));
 268
 269 // index older than source
 270                         result = 2;
 271                         fclose(fd);
 272                         fd = 0;
 273                 }
 274                 else
 275                 if(fs.get_size(test_indexable->path) != index_state->index_bytes)
 276                 {
 277 // source file is a different size than index source file
 278                         if(debug) printf("IndexFile::open_file %d index_size=" _LD " source_size=" _LD "\n",
 279                                 __LINE__,
 280                                 index_state->index_bytes,
 281                                 fs.get_size(test_indexable->path));
 282                         result = 2;
 283                         fclose(fd);
 284                         fd = 0;
 285                 }
 286                 else
 287                 {
 288                         if(debug) printf("IndexFile::open_file %d\n",
 289                                 __LINE__);
 290                         fseek(fd, 0, SEEK_END);
 291                         file_length = ftell(fd);
 292                         fseek(fd, 0, SEEK_SET);
 293                         result = 0;
 294                 }
 295                 test_indexable->Garbage::remove_user();
 296         }
 297         else
 298         {
 299 // doesn't exist
 300                 if(debug) printf("IndexFile::open_file %d index_filename=%s doesn't exist\n",
 301                         __LINE__,
 302                         index_filename);
 303                 result = 1;
 304         }
 305
 306         return result;
 307 }
 308
 309 int IndexFile::open_source()
 310 {
 311 //printf("IndexFile::open_source %p %s\n", asset, asset->path);
 312         int result = 0;
 313         if(indexable && indexable->is_asset)
 314         {
 315                 if(!source) source = new File;
 316
 317                 Asset *asset = (Asset*)indexable;
 318                 if(source->open_file(mwindow->preferences,
 319                         asset, 1, 0))
 320                 {
 321                         //printf("IndexFile::open_source() Couldn't open %s.\n", asset->path);
 322                         result = 1;
 323                 }
 324                 else
 325                 {
 326                         FileSystem fs;
 327                         asset->index_state->index_bytes = fs.get_size(asset->path);
 328                         source_length = source->get_audio_length();
 329                 }
 330         }
 331         else
 332         {
 333                 TransportCommand command;
 334                 command.command = NORMAL_FWD;
 335                 command.get_edl()->copy_all((EDL*)indexable);
 336                 command.change_type = CHANGE_ALL;
 337                 command.realtime = 0;
 338                 cache = new CICache(mwindow->preferences);
 339                 render_engine = new RenderEngine(0,
 340                         mwindow->preferences, 0, 0, 0);
 341                 render_engine->set_acache(cache);
 342                 render_engine->arm_command(&command);
 343                 FileSystem fs;
 344                 indexable->index_state->index_bytes = fs.get_size(indexable->path);
 345         }
 346
 347         return result;
 348 }
 349
 350 void IndexFile::close_source()
 351 {
 352         delete source;
 353         source = 0;
 354
 355         delete render_engine;
 356         render_engine = 0;
 357
 358         delete cache;
 359         cache = 0;
 360 }
 361
 362 int64_t IndexFile::get_required_scale()
 363 {
 364         int64_t result = 1;
 365
 366
 367 // get scale of index file
 368 // Total peaks which may be stored in buffer
 369         int64_t peak_count = mwindow->preferences->index_size /
 370                 (2 * sizeof(float) * source_channels);
 371         for(result = 1;
 372                 source_length / result > peak_count;
 373                 result *= 2)
 374                 ;
 375
 376 // Takes too long to draw from source on a CDROM.  Make indexes for
 377 // everything.
 378
 379         return result;
 380 }
 381
 382 int IndexFile::get_index_filename(char *source_filename,
 383         char *index_directory,
 384         char *index_filename,
 385         const char *input_filename,
 386         const char *suffix)
 387 {
 388         const char *input_fn = input_filename;
 389         char volume_id[BCTEXTLEN];
 390 // Replace mount/directory with volume_id if isofs
 391         if( !udf_volume_id(input_filename, volume_id) )
 392         {
 393                 char *cp = strrchr((char*)input_filename,'/');
 394                 if( cp ) input_fn = cp + 1;
 395                 for( cp=volume_id; *cp; ++cp );
 396                 *cp++ = '_';  strcpy(cp, input_fn);
 397                 input_fn = volume_id;
 398         }
 399 // Replace slashes and dots
 400         int i, j;
 401         int len = strlen(input_fn);
 402         for(i = 0, j = 0; i < len; i++)
 403         {
 404                 if(input_fn[i] != '/' &&
 405                         input_fn[i] != '.')
 406                         source_filename[j++] = input_fn[i];
 407                 else
 408                 {
 409                         if(i > 0)
 410                                 source_filename[j++] = '_';
 411                 }
 412         }
 413         source_filename[j] = 0;
 414         FileSystem fs;
 415         fs.join_names(index_filename, index_directory, source_filename);
 416         strcat(index_filename, suffix ? suffix : ".idx");
 417         return 0;
 418 }
 419
 420 int IndexFile::interrupt_index()
 421 {
 422         interrupt_flag = 1;
 423         return 0;
 424 }
 425
 426 // Read data into buffers
 427
 428 int IndexFile::create_index(MainProgressBar *progress)
 429 {
 430         int result = 0;
 431 SET_TRACE
 432
 433         interrupt_flag = 0;
 434
 435 // open the source file
 436         if(open_source()) return 1;
 437
 438 SET_TRACE
 439
 440         get_index_filename(source_filename,
 441                 mwindow->preferences->index_directory,
 442                 index_filename,
 443                 indexable->path);
 444
 445 SET_TRACE
 446
 447 // Some file formats have their own sample index.
 448 // Test for index in stream table of contents
 449         if(source && !source->get_index(index_filename))
 450         {
 451                 IndexState *index_state = get_state();
 452                 index_state->index_status = INDEX_READY;
 453                 redraw_edits(1);
 454         }
 455         else
 456 // Build index from scratch
 457         {
 458 SET_TRACE
 459
 460 // Indexes are now built for everything since it takes too long to draw
 461 // from CDROM source.
 462
 463 // get amount to read at a time in floats
 464                 int64_t buffersize = 65536;
 465                 char string[BCTEXTLEN];
 466                 sprintf(string, _("Creating %s."), index_filename);
 467
 468                 progress->update_title(string);
 469                 progress->update_length(source_length);
 470                 redraw_timer->update();
 471 SET_TRACE
 472
 473 // thread out index thread
 474                 IndexThread *index_thread = new IndexThread(mwindow,
 475                         this,
 476                         index_filename,
 477                         buffersize,
 478                         source_length);
 479                 index_thread->start_build();
 480
 481 // current sample in source file
 482                 int64_t position = 0;
 483                 int64_t fragment_size = buffersize;
 484                 int current_buffer = 0;
 485
 486
 487 // pass through file once
 488 // printf("IndexFile::create_index %d source_length=" _LD " source=%p progress=%p\n",
 489 // __LINE__,
 490 // source_length,
 491 // source,
 492 // progress);
 493 SET_TRACE
 494                 while(position < source_length && !result)
 495                 {
 496 SET_TRACE
 497                         if(source_length - position < fragment_size && fragment_size == buffersize) fragment_size = source_length - position;
 498
 499                         index_thread->input_lock[current_buffer]->lock("IndexFile::create_index 1");
 500                         index_thread->input_len[current_buffer] = fragment_size;
 501
 502 SET_TRACE
 503                         int cancelled = progress->update(position);
 504 //printf("IndexFile::create_index cancelled=%d\n", cancelled);
 505 SET_TRACE
 506                         if(cancelled ||
 507                                 index_thread->interrupt_flag ||
 508                                 interrupt_flag)
 509                         {
 510                                 result = 3;
 511                         }
 512
 513
 514 SET_TRACE
 515                         if(source && !result)
 516                         {
 517 SET_TRACE
 518                                 for(int channel = 0;
 519                                         !result && channel < source_channels;
 520                                         channel++)
 521                                 {
 522 // Read from source file
 523                                         source->set_audio_position(position);
 524                                         source->set_channel(channel);
 525
 526                                         if(source->read_samples(
 527                                                 index_thread->buffer_in[current_buffer][channel],
 528                                                 fragment_size))
 529                                                 result = 1;
 530                                 }
 531 SET_TRACE
 532                         }
 533                         else
 534                         if(render_engine && !result)
 535                         {
 536 SET_TRACE
 537                                 if(render_engine->arender)
 538                                 {
 539                                         result = render_engine->arender->process_buffer(
 540                                                 index_thread->buffer_in[current_buffer],
 541                                                 fragment_size,
 542                                                 position);
 543                                 }
 544                                 else
 545                                 {
 546                                         for(int i = 0; i < source_channels; i++)
 547                                         {
 548                                                 bzero(index_thread->buffer_in[current_buffer][i]->get_data(),
 549                                                         fragment_size * sizeof(double));
 550                                         }
 551                                 }
 552 SET_TRACE
 553                         }
 554 SET_TRACE
 555
 556 // Release buffer to thread
 557                         if(!result)
 558                         {
 559                                 index_thread->output_lock[current_buffer]->unlock();
 560                                 current_buffer++;
 561                                 if(current_buffer >= TOTAL_INDEX_BUFFERS) current_buffer = 0;
 562                                 position += fragment_size;
 563                         }
 564                         else
 565                         {
 566                                 index_thread->input_lock[current_buffer]->unlock();
 567                         }
 568 SET_TRACE
 569                 }
 570
 571
 572 // end thread cleanly
 573                 index_thread->input_lock[current_buffer]->lock("IndexFile::create_index 2");
 574                 index_thread->last_buffer[current_buffer] = 1;
 575                 index_thread->output_lock[current_buffer]->unlock();
 576                 index_thread->stop_build();
 577
 578
 579                 delete index_thread;
 580
 581         }
 582
 583
 584
 585         close_source();
 586
 587
 588
 589         open_index();
 590
 591         close_index();
 592
 593         mwindow->edl->set_index_file(indexable);
 594         return 0;
 595 }
 596
 597
 598
 599 int IndexFile::redraw_edits(int force)
 600 {
 601         int64_t difference = redraw_timer->get_scaled_difference(1000);
 602
 603         if(difference > 250 || force)
 604         {
 605                 redraw_timer->update();
 606                 mwindow->gui->lock_window("IndexFile::redraw_edits");
 607                 mwindow->edl->set_index_file(indexable);
 608                 mwindow->gui->draw_indexes(indexable);
 609                 mwindow->gui->unlock_window();
 610         }
 611         return 0;
 612 }
 613
 614
 615
 616
 617 int IndexFile::draw_index(
 618         TrackCanvas *canvas,
 619         ResourcePixmap *pixmap,
 620         Edit *edit,
 621         int x,
 622         int w)
 623 {
 624         const int debug = 0;
 625         IndexState *index_state = get_state();
 626         int pane_number = canvas->pane->number;
 627 //index_state->dump();
 628
 629 SET_TRACE
 630         if(debug) printf("IndexFile::draw_index %d\n", __LINE__);
 631         if(index_state->index_zoom == 0)
 632         {
 633                 printf(_("IndexFile::draw_index: index has 0 zoom\n"));
 634                 return 0;
 635         }
 636         if(debug) printf("IndexFile::draw_index %d\n", __LINE__);
 637
 638 // test channel number
 639         if(edit->channel > source_channels) return 1;
 640         if(debug) printf("IndexFile::draw_index %d source_samplerate=%d "
 641                         "w=%d samplerate=" _LD " zoom_sample=" _LD "\n",
 642                 __LINE__, source_samplerate, w,
 643                 mwindow->edl->session->sample_rate,
 644                 mwindow->edl->local_session->zoom_sample);
 645
 646 // calculate a virtual x where the edit_x should be in floating point
 647         double virtual_edit_x = 1.0 *
 648                 edit->track->from_units(edit->startproject) *
 649                 mwindow->edl->session->sample_rate /
 650                 mwindow->edl->local_session->zoom_sample -
 651                 mwindow->edl->local_session->view_start[pane_number];
 652
 653 // samples in segment to draw relative to asset
 654         double asset_over_session = (double)source_samplerate /
 655                 mwindow->edl->session->sample_rate;
 656         int64_t startsource = (int64_t)(((pixmap->pixmap_x - virtual_edit_x + x) *
 657                 mwindow->edl->local_session->zoom_sample +
 658                 edit->startsource) *
 659                 asset_over_session);
 660 // just in case we get a numerical error
 661         if (startsource < 0) startsource = 0;
 662         int64_t length = (int64_t)(w *
 663                 mwindow->edl->local_session->zoom_sample *
 664                 asset_over_session);
 665         int64_t lengthindex = length / index_state->index_zoom * 2;
 666         int64_t startindex = startsource / index_state->index_zoom * 2;
 667 // length of index to read in floats
 668 // length of index available in floats
 669         int64_t endindex = index_state->index_status == INDEX_BUILDING ?
 670                 index_state->get_channel_used(edit->channel) * 2 :
 671                 index_state->get_index_size(edit->channel);
 672 // Clamp length of index to read by available data
 673         if(startindex + lengthindex >= endindex )
 674                 lengthindex = endindex - startindex;
 675         if( lengthindex <= 0 ) return 0;
 676
 677 // Actual length read from file in bytes
 678         int64_t length_read;
 679 // Start and length of fragment to read from file in bytes.
 680         int64_t startfile, lengthfile;
 681         float *buffer = 0;
 682         int buffer_shared = 0;
 683         int center_pixel = mwindow->edl->local_session->zoom_track / 2;
 684         if( mwindow->edl->session->show_titles )
 685                 center_pixel += mwindow->theme->get_image("title_bg_data")->get_h();
 686         //int miny = center_pixel - mwindow->edl->local_session->zoom_track / 2;
 687         //int maxy = center_pixel + mwindow->edl->local_session->zoom_track / 2;
 688         int x1 = 0, y1, y2;
 689 // get zoom_sample relative to index zoomx
 690         double index_frames_per_pixel = mwindow->edl->local_session->zoom_sample /
 691                 index_state->index_zoom *
 692                 asset_over_session;
 693
 694
 695
 696         if(index_state->index_status == INDEX_BUILDING)
 697         {
 698 // index is in RAM, being built
 699                 buffer = index_state->get_channel_buffer(edit->channel);
 700                 if( !buffer ) return 0;
 701                 buffer += startindex;
 702                 buffer_shared = 1;
 703         }
 704         else
 705         {
 706 // add channel offset
 707                 startindex += index_state->get_index_offset(edit->channel);
 708 // index is stored in a file
 709                 buffer = new float[lengthindex + 1];
 710                 buffer_shared = 0;
 711                 startfile = index_state->index_start + startindex * sizeof(float);
 712                 lengthfile = lengthindex * sizeof(float);
 713                 length_read = 0;
 714
 715                 if(startfile < file_length)
 716                 {
 717                         fseek(fd, startfile, SEEK_SET);
 718
 719                         length_read = lengthfile;
 720                         if(startfile + length_read > file_length)
 721                                 length_read = file_length - startfile;
 722
 723                         (void)fread(buffer, length_read + sizeof(float), 1, fd);
 724                 }
 725
 726                 if(length_read < lengthfile) {
 727                         int pos = length_read / sizeof(float);
 728                         int file_length = lengthfile / sizeof(float);
 729                         while( pos < file_length ) buffer[pos++] = 0;
 730                 }
 731         }
 732
 733         canvas->set_color(mwindow->theme->audio_color);
 734
 735         double current_frame = 0;
 736         float highsample = buffer[0];
 737         float lowsample = buffer[1];
 738         int prev_y1 = center_pixel;
 739         int prev_y2 = center_pixel;
 740         int first_frame = 1;
 741         int zoom_y = mwindow->edl->local_session->zoom_y, zoom_y2 = zoom_y / 2;
 742         int max_y = canvas->get_h();
 743         int zmax_y = center_pixel + zoom_y2 - 1;
 744         if( zmax_y < max_y ) max_y = zmax_y;
 745 SET_TRACE
 746
 747         for(int bufferposition = 0;
 748                 bufferposition < lengthindex;
 749                 bufferposition += 2)
 750         {
 751                 if(current_frame >= index_frames_per_pixel)
 752                 {
 753
 754                         int y1 = (int)(center_pixel - highsample * zoom_y2);
 755                         int y2 = (int)(center_pixel - lowsample * zoom_y2);
 756                         CLAMP(y1, 0, max_y);  int next_y1 = y1;
 757                         CLAMP(y2, 0, max_y);  int next_y2 = y2;
 758 //printf("draw_line (%f,%f) = %d,%d,  %d,%d\n", lowsample, highsample, x1 + x, y1, x1 + x, y2);
 759
 760 //SET_TRACE
 761 // A different algorithm has to be used if it's 1 sample per pixel and the
 762 // index is used.  Now the min and max values are equal so we join the max samples.
 763                         if(mwindow->edl->local_session->zoom_sample == 1)
 764                         {
 765                                 canvas->draw_line(x1 + x - 1, prev_y1, x1 + x, y1, pixmap);
 766                         }
 767                         else
 768                         {
 769 // Extend line height if it doesn't connect to previous line
 770                                 if(!first_frame)
 771                                 {
 772                                         if(y1 > prev_y2) y1 = prev_y2 + 1;
 773                                         if(y2 < prev_y1) y2 = prev_y1 - 1;
 774                                 }
 775                                 else
 776                                 {
 777                                         first_frame = 0;
 778                                 }
 779
 780
 781
 782                                 canvas->draw_line(x1 + x, y1, x1 + x, y2, pixmap);
 783                         }
 784                         current_frame -= index_frames_per_pixel;
 785                         x1++;
 786                         prev_y1 = next_y1;
 787                         prev_y2 = next_y2;
 788                         highsample = buffer[bufferposition];
 789                         lowsample = buffer[bufferposition + 1];
 790                 }
 791
 792                 current_frame++;
 793                 highsample = MAX(highsample, buffer[bufferposition]);
 794                 lowsample = MIN(lowsample, buffer[bufferposition + 1]);
 795         }
 796 SET_TRACE
 797
 798 // Get last column
 799         if(current_frame)
 800         {
 801                 y1 = (int)(center_pixel - highsample * zoom_y2);
 802                 y2 = (int)(center_pixel - lowsample * zoom_y2);
 803                 canvas->draw_line(x1 + x, y1, x1 + x, y2, pixmap);
 804         }
 805
 806 SET_TRACE
 807
 808
 809
 810         if(!buffer_shared) delete [] buffer;
 811 SET_TRACE
 812         if(debug) printf("IndexFile::draw_index %d\n", __LINE__);
 813         return 0;
 814 }
 815
 816 int IndexFile::close_index()
 817 {
 818         if(fd)
 819         {
 820                 fclose(fd);
 821                 fd = 0;
 822         }
 823         return 0;
 824 }
 825
 826 int IndexFile::remove_index()
 827 {
 828         IndexState *index_state = get_state();
 829         if(index_state->index_status == INDEX_READY ||
 830                 index_state->index_status == INDEX_NOTTESTED)
 831         {
 832                 close_index();
 833                 remove(index_filename);
 834         }
 835         return 0;
 836 }
 837
 838 int IndexFile::read_info(Indexable *test_indexable)
 839 {
 840         const int debug = 0;
 841
 842 // Store format in actual asset.
 843 // If it's a nested EDL, we never want the format, just the index info.
 844         if(!test_indexable) test_indexable = indexable;
 845         if(!test_indexable) return 1;
 846
 847         IndexState * index_state = test_indexable->index_state;
 848         if(index_state->index_status == INDEX_NOTTESTED)
 849         {
 850 // read start of index data
 851                 int temp = fread((char*)&(index_state->index_start), sizeof(int64_t), 1, fd);
 852 //printf("IndexFile::read_info %d %f\n", __LINE__, test_indexable->get_frame_rate());
 853
 854                 if(!temp) return 1;
 855 // read test_indexable info from index
 856                 char *data;
 857
 858                 data = new char[index_state->index_start];
 859                 temp = fread(data, index_state->index_start - sizeof(int64_t), 1, fd);
 860                 if(!temp) return 1;
 861
 862                 data[index_state->index_start - sizeof(int64_t)] = 0;
 863                 FileXML xml;
 864                 xml.read_from_string(data);
 865                 delete [] data;
 866
 867
 868
 869 // Read the file format & index state.
 870                 if(test_indexable->is_asset)
 871                 {
 872                         Asset *asset = (Asset*)test_indexable;
 873                         asset->read(&xml);
 874
 875 //printf("IndexFile::read_info %d %f\n", __LINE__, asset->get_frame_rate());
 876
 877                         if(asset->format == FILE_UNKNOWN)
 878                         {
 879 if(debug) printf("IndexFile::read_info %d\n", __LINE__);
 880                                 return 1;
 881                         }
 882                 }
 883                 else
 884                 {
 885 // Read only the index state for a nested EDL
 886                         int result = 0;
 887 if(debug) printf("IndexFile::read_info %d\n", __LINE__);
 888                         while(!result)
 889                         {
 890                                 result = xml.read_tag();
 891                                 if(!result)
 892                                 {
 893                                         if(xml.tag.title_is("INDEX"))
 894                                         {
 895                                                 index_state->read_xml(&xml, source_channels);
 896 if(debug) printf("IndexFile::read_info %d\n", __LINE__);
 897 if(debug) index_state->dump();
 898                                                 result = 1;
 899                                         }
 900                                 }
 901                         }
 902                 }
 903         }
 904
 905         return 0;
 906 }
 907
 908
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 910
 911
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