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 = &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 = &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
 145         if(indexable)
 146         {
 147                 indexable->add_user();
 148                 source_channels = indexable->get_audio_channels();
 149                 source_samplerate = indexable->get_sample_rate();
 150                 source_length = indexable->get_audio_samples();
 151         }
 152 }
 153
 154 IndexFile::~IndexFile()
 155 {
 156 //printf("IndexFile::~IndexFile 1\n");
 157         delete redraw_timer;
 158         if(indexable) indexable->remove_user();
 159         close_source();
 160 }
 161
 162 void IndexFile::reset()
 163 {
 164         fd = 0;
 165         source = 0;
 166         interrupt_flag = 0;
 167         source_length = 0;
 168         source_channels = 0;
 169         indexable = 0;
 170         render_engine = 0;
 171         cache = 0;
 172 }
 173
 174 IndexState* IndexFile::get_state()
 175 {
 176         IndexState *index_state = 0;
 177         if(indexable) index_state = indexable->index_state;
 178         return index_state;
 179 }
 180
 181
 182
 183 int IndexFile::open_index()
 184 {
 185         IndexState *index_state = 0;
 186         int result = 0;
 187
 188 // use buffer if being built
 189         index_state = get_state();
 190
 191         if(index_state->index_status == INDEX_BUILDING)
 192         {
 193 // use buffer
 194                 result = 0;
 195         }
 196         else
 197         if(!(result = open_file()))
 198         {
 199 // opened existing file
 200                 if(read_info())
 201                 {
 202                         result = 1;
 203                         close_index();
 204                 }
 205                 else
 206                 {
 207                         index_state->index_status = INDEX_READY;
 208                 }
 209         }
 210         else
 211         {
 212                 result = 1;
 213         }
 214
 215         return result;
 216 }
 217
 218 void IndexFile::delete_index(Preferences *preferences,
 219         Indexable *indexable, const char *suffix)
 220 {
 221         char index_filename[BCTEXTLEN];
 222         char source_filename[BCTEXTLEN];
 223         const char *path = indexable->path;
 224
 225         get_index_filename(source_filename,
 226                 preferences->index_directory,
 227                 index_filename, path, suffix);
 228 //printf("IndexFile::delete_index %s %s\n", source_filename, index_filename);
 229         remove_file(index_filename);
 230 }
 231
 232 int IndexFile::open_file()
 233 {
 234         int result = 0;
 235         const int debug = 0;
 236         const char *path = indexable->path;
 237
 238
 239 //printf("IndexFile::open_file %f\n", indexable->get_frame_rate());
 240
 241         get_index_filename(source_filename,
 242                 mwindow->preferences->index_directory,
 243                 index_filename,
 244                 path);
 245
 246         if(debug) printf("IndexFile::open_file %d index_filename=%s\n",
 247                 __LINE__,
 248                 index_filename);
 249         fd = fopen(index_filename, "rb");
 250         if( fd != 0 )
 251         {
 252 // Index file already exists.
 253 // Get its last size without changing the real asset status.
 254                 Indexable *test_indexable = new Indexable(0);
 255                 if(indexable)
 256                         test_indexable->copy_indexable(indexable);
 257                 read_info(test_indexable);
 258                 IndexState *index_state = test_indexable->index_state;
 259
 260                 FileSystem fs;
 261                 if(fs.get_date(index_filename) < fs.get_date(test_indexable->path))
 262                 {
 263                         if(debug) printf("IndexFile::open_file %d index_date=%jd source_date=%jd\n",
 264                                 __LINE__,
 265                                 fs.get_date(index_filename),
 266                                 fs.get_date(test_indexable->path));
 267
 268 // index older than source
 269                         result = 2;
 270                         fclose(fd);
 271                         fd = 0;
 272                 }
 273                 else
 274                 if(fs.get_size(test_indexable->path) != index_state->index_bytes)
 275                 {
 276 // source file is a different size than index source file
 277                         if(debug) printf("IndexFile::open_file %d index_size=%jd source_size=%jd\n",
 278                                 __LINE__,
 279                                 index_state->index_bytes,
 280                                 fs.get_size(test_indexable->path));
 281                         result = 2;
 282                         fclose(fd);
 283                         fd = 0;
 284                 }
 285                 else
 286                 {
 287                         if(debug) printf("IndexFile::open_file %d\n",
 288                                 __LINE__);
 289                         fseek(fd, 0, SEEK_END);
 290                         file_length = ftell(fd);
 291                         fseek(fd, 0, SEEK_SET);
 292                         result = 0;
 293                 }
 294                 test_indexable->Garbage::remove_user();
 295         }
 296         else
 297         {
 298 // doesn't exist
 299                 if(debug) printf("IndexFile::open_file %d index_filename=%s doesn't exist\n",
 300                         __LINE__,
 301                         index_filename);
 302                 result = 1;
 303         }
 304
 305         return result;
 306 }
 307
 308 int IndexFile::open_source()
 309 {
 310 //printf("IndexFile::open_source %p %s\n", asset, asset->path);
 311         int result = 0;
 312         if(indexable && indexable->is_asset)
 313         {
 314                 if(!source) source = new File;
 315
 316                 Asset *asset = (Asset*)indexable;
 317                 if(source->open_file(mwindow->preferences,
 318                         asset, 1, 0))
 319                 {
 320                         //printf("IndexFile::open_source() Couldn't open %s.\n", asset->path);
 321                         result = 1;
 322                 }
 323                 else
 324                 {
 325                         FileSystem fs;
 326                         asset->index_state->index_bytes = fs.get_size(asset->path);
 327                         source_length = source->get_audio_length();
 328                 }
 329         }
 330         else
 331         {
 332                 TransportCommand command;
 333                 command.command = NORMAL_FWD;
 334                 command.get_edl()->copy_all((EDL*)indexable);
 335                 command.change_type = CHANGE_ALL;
 336                 command.realtime = 0;
 337                 cache = new CICache(mwindow->preferences);
 338                 render_engine = new RenderEngine(0,
 339                         mwindow->preferences, 0, 0, 0);
 340                 render_engine->set_acache(cache);
 341                 render_engine->arm_command(&command);
 342                 FileSystem fs;
 343                 indexable->index_state->index_bytes = fs.get_size(indexable->path);
 344         }
 345
 346         return result;
 347 }
 348
 349 void IndexFile::close_source()
 350 {
 351         delete source;
 352         source = 0;
 353
 354         delete render_engine;
 355         render_engine = 0;
 356
 357         delete cache;
 358         cache = 0;
 359 }
 360
 361 int64_t IndexFile::get_required_scale()
 362 {
 363         int64_t result = 1;
 364
 365
 366 // get scale of index file
 367 // Total peaks which may be stored in buffer
 368         int64_t peak_count = mwindow->preferences->index_size /
 369                 (2 * sizeof(float) * source_channels);
 370         for(result = 1;
 371                 source_length / result > peak_count;
 372                 result *= 2)
 373                 ;
 374
 375 // Takes too long to draw from source on a CDROM.  Make indexes for
 376 // everything.
 377
 378         return result;
 379 }
 380
 381 int IndexFile::get_index_filename(char *source_filename,
 382         char *index_directory,
 383         char *index_filename,
 384         const char *input_filename,
 385         const char *suffix)
 386 {
 387         const char *input_fn = input_filename;
 388         char volume_id[BCTEXTLEN];
 389 // Replace mount/directory with volume_id if isofs
 390         if( !udf_volume_id(input_filename, volume_id) )
 391         {
 392                 char *cp = strrchr((char*)input_filename,'/');
 393                 if( cp ) input_fn = cp + 1;
 394                 for( cp=volume_id; *cp; ++cp );
 395                 *cp++ = '_';  strcpy(cp, input_fn);
 396                 input_fn = volume_id;
 397         }
 398 // Replace slashes and dots
 399         int i, j;
 400         int len = strlen(input_fn);
 401         for(i = 0, j = 0; i < len; i++)
 402         {
 403                 if(input_fn[i] != '/' &&
 404                         input_fn[i] != '.')
 405                         source_filename[j++] = input_fn[i];
 406                 else
 407                 {
 408                         if(i > 0)
 409                                 source_filename[j++] = '_';
 410                 }
 411         }
 412         source_filename[j] = 0;
 413         FileSystem fs;
 414         fs.join_names(index_filename, index_directory, source_filename);
 415         strcat(index_filename, suffix ? suffix : ".idx");
 416         return 0;
 417 }
 418
 419 int IndexFile::interrupt_index()
 420 {
 421         interrupt_flag = 1;
 422         return 0;
 423 }
 424
 425 // Read data into buffers
 426
 427 int IndexFile::create_index(MainProgressBar *progress)
 428 {
 429         int result = 0;
 430 SET_TRACE
 431
 432         interrupt_flag = 0;
 433
 434 // open the source file
 435         if(open_source()) return 1;
 436
 437 SET_TRACE
 438
 439         get_index_filename(source_filename,
 440                 mwindow->preferences->index_directory,
 441                 index_filename,
 442                 indexable->path);
 443
 444 SET_TRACE
 445
 446 // Some file formats have their own sample index.
 447 // Test for index in stream table of contents
 448         if(source && !source->get_index(this, progress))
 449         {
 450                 IndexState *index_state = get_state();
 451                 index_state->index_status = INDEX_READY;
 452                 redraw_edits(1);
 453         }
 454         else
 455 // Build index from scratch
 456         {
 457 SET_TRACE
 458
 459 // Indexes are now built for everything since it takes too long to draw
 460 // from CDROM source.
 461
 462 // get amount to read at a time in floats
 463                 int64_t buffersize = 65536;
 464                 char string[BCTEXTLEN];
 465                 sprintf(string, _("Creating %s."), index_filename);
 466
 467                 progress->update_title(string);
 468                 progress->update_length(source_length);
 469                 redraw_timer->update();
 470 SET_TRACE
 471
 472 // thread out index thread
 473                 IndexThread *index_thread = new IndexThread(mwindow,
 474                         this,
 475                         index_filename,
 476                         buffersize,
 477                         source_length);
 478                 index_thread->start_build();
 479
 480 // current sample in source file
 481                 int64_t position = 0;
 482                 int64_t fragment_size = buffersize;
 483                 int current_buffer = 0;
 484
 485
 486 // pass through file once
 487 // printf("IndexFile::create_index %d source_length=%jd source=%p progress=%p\n",
 488 // __LINE__,
 489 // source_length,
 490 // source,
 491 // progress);
 492 SET_TRACE
 493                 while(position < source_length && !result)
 494                 {
 495 SET_TRACE
 496                         if(source_length - position < fragment_size && fragment_size == buffersize) fragment_size = source_length - position;
 497
 498                         index_thread->input_lock[current_buffer]->lock("IndexFile::create_index 1");
 499                         index_thread->input_len[current_buffer] = fragment_size;
 500
 501 SET_TRACE
 502                         int cancelled = progress->update(position);
 503 //printf("IndexFile::create_index cancelled=%d\n", cancelled);
 504 SET_TRACE
 505                         if(cancelled ||
 506                                 index_thread->interrupt_flag ||
 507                                 interrupt_flag)
 508                         {
 509                                 result = 3;
 510                         }
 511
 512
 513 SET_TRACE
 514                         if(source && !result)
 515                         {
 516 SET_TRACE
 517                                 for(int channel = 0;
 518                                         !result && channel < source_channels;
 519                                         channel++)
 520                                 {
 521 // Read from source file
 522                                         source->set_audio_position(position);
 523                                         source->set_channel(channel);
 524
 525                                         if(source->read_samples(
 526                                                 index_thread->buffer_in[current_buffer][channel],
 527                                                 fragment_size))
 528                                                 result = 1;
 529                                 }
 530 SET_TRACE
 531                         }
 532                         else
 533                         if(render_engine && !result)
 534                         {
 535 SET_TRACE
 536                                 if(render_engine->arender)
 537                                 {
 538                                         result = render_engine->arender->process_buffer(
 539                                                 index_thread->buffer_in[current_buffer],
 540                                                 fragment_size,
 541                                                 position);
 542                                 }
 543                                 else
 544                                 {
 545                                         for(int i = 0; i < source_channels; i++)
 546                                         {
 547                                                 bzero(index_thread->buffer_in[current_buffer][i]->get_data(),
 548                                                         fragment_size * sizeof(double));
 549                                         }
 550                                 }
 551 SET_TRACE
 552                         }
 553 SET_TRACE
 554
 555 // Release buffer to thread
 556                         if(!result)
 557                         {
 558                                 index_thread->output_lock[current_buffer]->unlock();
 559                                 current_buffer++;
 560                                 if(current_buffer >= TOTAL_INDEX_BUFFERS) current_buffer = 0;
 561                                 position += fragment_size;
 562                         }
 563                         else
 564                         {
 565                                 index_thread->input_lock[current_buffer]->unlock();
 566                         }
 567 SET_TRACE
 568                 }
 569
 570
 571 // end thread cleanly
 572                 index_thread->input_lock[current_buffer]->lock("IndexFile::create_index 2");
 573                 index_thread->last_buffer[current_buffer] = 1;
 574                 index_thread->output_lock[current_buffer]->unlock();
 575                 index_thread->stop_build();
 576
 577
 578                 delete index_thread;
 579
 580         }
 581
 582
 583
 584         close_source();
 585
 586
 587
 588         open_index();
 589
 590         close_index();
 591
 592         mwindow->edl->set_index_file(indexable);
 593         return 0;
 594 }
 595
 596
 597
 598 int IndexFile::redraw_edits(int force)
 599 {
 600         int64_t difference = redraw_timer->get_scaled_difference(1000);
 601
 602         if(difference > 250 || force)
 603         {
 604                 redraw_timer->update();
 605                 mwindow->gui->lock_window("IndexFile::redraw_edits");
 606                 mwindow->edl->set_index_file(indexable);
 607                 mwindow->gui->draw_indexes(indexable);
 608                 mwindow->gui->unlock_window();
 609         }
 610         return 0;
 611 }
 612
 613
 614
 615
 616 int IndexFile::draw_index(
 617         TrackCanvas *canvas,
 618         ResourcePixmap *pixmap,
 619         Edit *edit,
 620         int x,
 621         int w)
 622 {
 623         const int debug = 0;
 624         IndexState *index_state = get_state();
 625         int pane_number = canvas->pane->number;
 626 //index_state->dump();
 627
 628 SET_TRACE
 629         if(debug) printf("IndexFile::draw_index %d\n", __LINE__);
 630         if(index_state->index_zoom == 0)
 631         {
 632                 printf(_("IndexFile::draw_index: index has 0 zoom\n"));
 633                 return 0;
 634         }
 635         if(debug) printf("IndexFile::draw_index %d\n", __LINE__);
 636
 637 // test channel number
 638         if(edit->channel > source_channels) return 1;
 639         if(debug) printf("IndexFile::draw_index %d source_samplerate=%d "
 640                         "w=%d samplerate=%jd zoom_sample=%jd\n",
 641                 __LINE__, source_samplerate, w,
 642                 mwindow->edl->session->sample_rate,
 643                 mwindow->edl->local_session->zoom_sample);
 644
 645 // calculate a virtual x where the edit_x should be in floating point
 646         double virtual_edit_x = 1.0 *
 647                 edit->track->from_units(edit->startproject) *
 648                 mwindow->edl->session->sample_rate /
 649                 mwindow->edl->local_session->zoom_sample -
 650                 mwindow->edl->local_session->view_start[pane_number];
 651
 652 // samples in segment to draw relative to asset
 653         double asset_over_session = (double)source_samplerate /
 654                 mwindow->edl->session->sample_rate;
 655         int64_t startsource = (int64_t)(((pixmap->pixmap_x - virtual_edit_x + x) *
 656                 mwindow->edl->local_session->zoom_sample +
 657                 edit->startsource) *
 658                 asset_over_session);
 659 // just in case we get a numerical error
 660         if (startsource < 0) startsource = 0;
 661         int64_t length = (int64_t)(w *
 662                 mwindow->edl->local_session->zoom_sample *
 663                 asset_over_session);
 664         int64_t lengthindex = length / index_state->index_zoom * 2;
 665         int64_t startindex = startsource / index_state->index_zoom * 2;
 666 // length of index to read in floats
 667 // length of index available in floats
 668         int64_t endindex = index_state->index_status == INDEX_BUILDING ?
 669                 index_state->get_channel_used(edit->channel) * 2 :
 670                 index_state->get_index_size(edit->channel);
 671 // Clamp length of index to read by available data
 672         if(startindex + lengthindex >= endindex )
 673                 lengthindex = endindex - startindex;
 674         if( lengthindex <= 0 ) return 0;
 675
 676 // Actual length read from file in bytes
 677         int64_t length_read;
 678 // Start and length of fragment to read from file in bytes.
 679         int64_t startfile, lengthfile;
 680         float *buffer = 0;
 681         int buffer_shared = 0;
 682         int center_pixel = mwindow->edl->local_session->zoom_track / 2;
 683         if( mwindow->edl->session->show_titles )
 684                 center_pixel += mwindow->theme->get_image("title_bg_data")->get_h();
 685         //int miny = center_pixel - mwindow->edl->local_session->zoom_track / 2;
 686         //int maxy = center_pixel + mwindow->edl->local_session->zoom_track / 2;
 687         int x1 = 0, y1, y2;
 688 // get zoom_sample relative to index zoomx
 689         double index_frames_per_pixel = mwindow->edl->local_session->zoom_sample /
 690                 index_state->index_zoom *
 691                 asset_over_session;
 692
 693
 694
 695         if(index_state->index_status == INDEX_BUILDING)
 696         {
 697 // index is in RAM, being built
 698                 buffer = index_state->get_channel_buffer(edit->channel);
 699                 if( !buffer ) return 0;
 700                 buffer += startindex;
 701                 buffer_shared = 1;
 702         }
 703         else
 704         {
 705 // add channel offset
 706                 startindex += index_state->get_index_offset(edit->channel);
 707 // index is stored in a file
 708                 buffer = new float[lengthindex + 1];
 709                 buffer_shared = 0;
 710                 startfile = index_state->index_start + startindex * sizeof(float);
 711                 lengthfile = lengthindex * sizeof(float);
 712                 length_read = 0;
 713
 714                 if(startfile < file_length)
 715                 {
 716                         fseek(fd, startfile, SEEK_SET);
 717
 718                         length_read = lengthfile;
 719                         if(startfile + length_read > file_length)
 720                                 length_read = file_length - startfile;
 721
 722                         (void)fread(buffer, length_read + sizeof(float), 1, fd);
 723                 }
 724
 725                 if(length_read < lengthfile) {
 726                         int pos = length_read / sizeof(float);
 727                         int file_length = lengthfile / sizeof(float);
 728                         while( pos < file_length ) buffer[pos++] = 0;
 729                 }
 730         }
 731
 732         canvas->set_color(mwindow->theme->audio_color);
 733
 734         double current_frame = 0;
 735         float highsample = buffer[0];
 736         float lowsample = buffer[1];
 737         int prev_y1 = center_pixel;
 738         int prev_y2 = center_pixel;
 739         int first_frame = 1;
 740         int zoom_y = mwindow->edl->local_session->zoom_y, zoom_y2 = zoom_y / 2;
 741         int max_y = canvas->get_h();
 742         int zmax_y = center_pixel + zoom_y2 - 1;
 743         if( zmax_y < max_y ) max_y = zmax_y;
 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 *asset = (Asset*)test_indexable;
 872                         asset->read(&xml);
 873
 874 //printf("IndexFile::read_info %d %f\n", __LINE__, asset->get_frame_rate());
 875
 876                         if(asset->format == FILE_UNKNOWN)
 877                         {
 878 if(debug) printf("IndexFile::read_info %d\n", __LINE__);
 879                                 return 1;
 880                         }
 881                 }
 882                 else
 883                 {
 884 // Read only the index state for a nested EDL
 885                         int result = 0;
 886 if(debug) printf("IndexFile::read_info %d\n", __LINE__);
 887                         while(!result)
 888                         {
 889                                 result = xml.read_tag();
 890                                 if(!result)
 891                                 {
 892                                         if(xml.tag.title_is("INDEX"))
 893                                         {
 894                                                 index_state->read_xml(&xml, source_channels);
 895 if(debug) printf("IndexFile::read_info %d\n", __LINE__);
 896 if(debug) index_state->dump();
 897                                                 result = 1;
 898                                         }
 899                                 }
 900                         }
 901                 }
 902         }
 903
 904         return 0;
 905 }
 906
 907
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