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 "automation.h"
  25 #include "autos.h"
  26 #include "bcsignals.h"
  27 #include "bctimer.h"
  28 #include "cache.h"
  29 #include "clip.h"
  30 #include "condition.h"
  31 #include "edit.h"
  32 #include "edl.h"
  33 #include "edlsession.h"
  34 #include "errorbox.h"
  35 #include "file.h"
  36 #include "filesystem.h"
  37 #include "filexml.h"
  38 #include "floatauto.h"
  39 #include "floatautos.h"
  40 #include "indexable.h"
  41 #include "indexfile.h"
  42 #include "indexstate.h"
  43 #include "indexthread.h"
  44 #include "language.h"
  45 #include "localsession.h"
  46 #include "mainprogress.h"
  47 #include "mwindowgui.h"
  48 #include "mwindow.h"
  49 #include "preferences.h"
  50 #include "removefile.h"
  51 #include "renderengine.h"
  52 #include "resourcepixmap.h"
  53 #include "samples.h"
  54 #include "theme.h"
  55 #include "timelinepane.h"
  56 #include "trackcanvas.h"
  57 #include "tracks.h"
  58 #include "transportque.h"
  59 #include "vframe.h"
  60
  61
  62 #include <stdio.h>
  63 #include <stdlib.h>
  64 #include <stdint.h>
  65 #include <unistd.h>
  66 #include <string.h>
  67 #include <errno.h>
  68 #include <fcntl.h>
  69 #include <ctype.h>
  70
  71 #include <sys/types.h>
  72 #include <sys/stat.h>
  73 #ifdef HAVE_ISOFS
  74 #include <linux/iso_fs.h>
  75 #endif
  76 #if defined(__FreeBSD__)
  77 #include <isofs/cd9660/iso.h>
  78 #endif
  79
  80 // check for isofs volume_id for dvd/cdrom
  81
  82 static int udf_volume_id(const char *path, char *fname)
  83 {
  84         int result = 1;
  85 #ifdef HAVE_ISOFS
  86         struct stat st;
  87         if( stat(path,&st) ) return 1;
  88         // search mounted devices
  89         FILE *fp = fopen("/proc/mounts","r");
  90         if( !fp ) return 1;
  91
  92         while( result && !feof(fp) && !ferror(fp) ) {
  93                 char devpath[BCTEXTLEN], mpath[BCTEXTLEN];
  94                 char options[BCTEXTLEN], line[BCTEXTLEN];
  95                 char fstype[64], zero1[16], zero2[16];
  96                 if( !fgets(&line[0], sizeof(line)-1, fp) ) break;
  97                 int n = sscanf(&line[0], "%s %s %s %s %s %s\n",
  98                          devpath, mpath, fstype, options, zero1, zero2);
  99                 if( n != 6 ) continue;
 100                 // check udf filesystems
 101                 if( strcmp(fstype,"udf") != 0 ) continue;
 102                 struct stat dst;
 103                 if( stat(devpath,&dst) ) continue;
 104                 if( st.st_dev != dst.st_rdev ) continue;
 105                 int fd = open(devpath,O_RDONLY);
 106                 if( fd < 0 ) continue;
 107                 struct iso_primary_descriptor id;
 108                 if( lseek(fd,0x8000,SEEK_SET) == 0x8000 )
 109                         n = read(fd,&id,sizeof(id));
 110                 close(fd);
 111                 if( n != sizeof(id) ) continue;
 112                 // look for magic number
 113                 if( strncmp(ISO_STANDARD_ID,id.id,sizeof(id.id)) ) continue;
 114                 // look for volume_id
 115                 if( !isalnum(id.volume_id[0]) ) continue;
 116                 char *bp = (char*)&id.volume_id[0], *cp = fname;
 117                 for( int i=0; i<(int)sizeof(id.volume_id); ++i ) *cp++ = *bp++;
 118                 while( --cp>=fname && *cp==' ' ) *cp = 0;
 119                 if( !*fname ) continue;
 120                 // fname = volume_id _ creation_date
 121                 ++cp;  *cp++ = '_';  bp = (char*)&id.creation_date[0];
 122                 for( int i=0; i<(int)sizeof(id.creation_date)-1; ++i ) {
 123                         if( !isdigit(*bp) ) break;
 124                         *cp++ = *bp++;
 125                 }
 126                 *cp++ = 0;
 127                 if( cp-fname > 4 ) result = 0;
 128         }
 129
 130         fclose(fp);
 131 #endif
 132         return result;
 133 }
 134
 135 // Use native sampling rates for files so the same index can be used in
 136 // multiple projects.
 137
 138 IndexFile::IndexFile(MWindow *mwindow)
 139 {
 140 //printf("IndexFile::IndexFile 1\n");
 141         reset();
 142         this->mwindow = mwindow;
 143 //printf("IndexFile::IndexFile 2\n");
 144         redraw_timer = new Timer;
 145 }
 146
 147 IndexFile::IndexFile(MWindow *mwindow,
 148         Indexable *indexable)
 149 {
 150 //printf("IndexFile::IndexFile 2\n");
 151         reset();
 152         this->mwindow = mwindow;
 153         this->indexable = indexable;
 154         redraw_timer = new Timer;
 155         if(indexable)
 156         {
 157                 indexable->add_user();
 158                 source_channels = indexable->get_audio_channels();
 159                 source_samplerate = indexable->get_sample_rate();
 160                 source_length = indexable->get_audio_samples();
 161         }
 162 }
 163
 164 IndexFile::~IndexFile()
 165 {
 166 //printf("IndexFile::~IndexFile 1\n");
 167         delete redraw_timer;
 168         if(indexable) indexable->remove_user();
 169         close_source();
 170 }
 171
 172 void IndexFile::reset()
 173 {
 174         fd = 0;
 175         source = 0;
 176         interrupt_flag = 0;
 177         source_length = 0;
 178         source_channels = 0;
 179         indexable = 0;
 180         render_engine = 0;
 181         cache = 0;
 182 }
 183
 184 IndexState* IndexFile::get_state()
 185 {
 186         IndexState *index_state = 0;
 187         if(indexable) index_state = indexable->index_state;
 188         return index_state;
 189 }
 190
 191
 192
 193 int IndexFile::open_index()
 194 {
 195         IndexState *index_state = 0;
 196         int result = 0;
 197
 198 // use buffer if being built
 199         index_state = get_state();
 200
 201         if(index_state->index_status == INDEX_BUILDING)
 202         {
 203 // use buffer
 204                 result = 0;
 205         }
 206         else
 207         if(!(result = open_file()))
 208         {
 209 // opened existing file
 210                 if(read_info())
 211                 {
 212                         result = 1;
 213                         close_index();
 214                 }
 215                 else
 216                 {
 217                         index_state->index_status = INDEX_READY;
 218                 }
 219         }
 220         else
 221         {
 222                 result = 1;
 223         }
 224
 225         return result;
 226 }
 227
 228 void IndexFile::delete_index(Preferences *preferences,
 229         Indexable *indexable, const char *suffix)
 230 {
 231         char index_filename[BCTEXTLEN];
 232         char source_filename[BCTEXTLEN];
 233         const char *path = indexable->path;
 234         if( !*path ) return;
 235         get_index_filename(source_filename,
 236                 preferences->index_directory,
 237                 index_filename, path, suffix);
 238 //printf("IndexFile::delete_index %s %s\n", source_filename, index_filename);
 239         remove_file(index_filename);
 240 }
 241
 242 void IndexFile::delete_index_files(Preferences *preferences,
 243         Indexable *indexable)
 244 {
 245         delete_index(preferences, indexable, ".toc");
 246         delete_index(preferences, indexable, ".idx");
 247         delete_index(preferences, indexable, ".mkr");
 248 }
 249
 250
 251 int IndexFile::open_file()
 252 {
 253         int result = 0;
 254         const int debug = 0;
 255         const char *path = indexable->path;
 256
 257
 258 //printf("IndexFile::open_file %f\n", indexable->get_frame_rate());
 259
 260         get_index_filename(source_filename,
 261                 mwindow->preferences->index_directory,
 262                 index_filename,
 263                 path);
 264
 265         if(debug) printf("IndexFile::open_file %d index_filename=%s\n",
 266                 __LINE__,
 267                 index_filename);
 268         fd = fopen(index_filename, "rb");
 269         if( fd != 0 )
 270         {
 271 // Index file already exists.
 272 // Get its last size without changing the real asset status.
 273                 Indexable *test_indexable = new Indexable(0);
 274                 if(indexable)
 275                         test_indexable->copy_indexable(indexable);
 276                 read_info(test_indexable);
 277                 IndexState *index_state = test_indexable->index_state;
 278
 279                 FileSystem fs;
 280                 if(fs.get_date(index_filename) < fs.get_date(test_indexable->path))
 281                 {
 282                         if(debug) printf("IndexFile::open_file %d index_date=%jd source_date=%jd\n",
 283                                 __LINE__,
 284                                 fs.get_date(index_filename),
 285                                 fs.get_date(test_indexable->path));
 286
 287 // index older than source
 288                         result = 2;
 289                         fclose(fd);
 290                         fd = 0;
 291                 }
 292                 else
 293                 if(fs.get_size(test_indexable->path) != index_state->index_bytes)
 294                 {
 295 // source file is a different size than index source file
 296                         if(debug) printf("IndexFile::open_file %d index_size=%jd source_size=%jd\n",
 297                                 __LINE__,
 298                                 index_state->index_bytes,
 299                                 fs.get_size(test_indexable->path));
 300                         result = 2;
 301                         fclose(fd);
 302                         fd = 0;
 303                 }
 304                 else
 305                 {
 306                         if(debug) printf("IndexFile::open_file %d\n",
 307                                 __LINE__);
 308                         fseek(fd, 0, SEEK_END);
 309                         file_length = ftell(fd);
 310                         fseek(fd, 0, SEEK_SET);
 311                         result = 0;
 312                 }
 313                 test_indexable->Garbage::remove_user();
 314         }
 315         else
 316         {
 317 // doesn't exist
 318                 if(debug) printf("IndexFile::open_file %d index_filename=%s doesn't exist\n",
 319                         __LINE__,
 320                         index_filename);
 321                 result = 1;
 322         }
 323
 324         return result;
 325 }
 326
 327 int IndexFile::open_source()
 328 {
 329 //printf("IndexFile::open_source %p %s\n", asset, asset->path);
 330         int result = 0;
 331         if(indexable && indexable->is_asset)
 332         {
 333                 if(!source) source = new File;
 334
 335                 Asset *asset = (Asset*)indexable;
 336                 if(source->open_file(mwindow->preferences,
 337                         asset, 1, 0))
 338                 {
 339                         //printf("IndexFile::open_source() Couldn't open %s.\n", asset->path);
 340                         result = 1;
 341                 }
 342                 else
 343                 {
 344                         FileSystem fs;
 345                         asset->index_state->index_bytes = fs.get_size(asset->path);
 346                         source_length = source->get_audio_length();
 347                         int proxy_scale = asset->proxy_scale;
 348                         if( proxy_scale > 0 ) {
 349                                 asset->width = asset->actual_width * proxy_scale;
 350                                 asset->height = asset->actual_height * proxy_scale;
 351                         }
 352                 }
 353         }
 354         else
 355         {
 356                 TransportCommand command(mwindow->preferences);
 357                 command.command = NORMAL_FWD;
 358                 command.get_edl()->copy_all((EDL*)indexable);
 359                 command.change_type = CHANGE_ALL;
 360                 command.realtime = 0;
 361                 cache = new CICache(mwindow->preferences);
 362                 render_engine = new RenderEngine(0,
 363                         mwindow->preferences, 0, 0);
 364                 render_engine->set_acache(cache);
 365                 render_engine->arm_command(&command);
 366                 FileSystem fs;
 367                 indexable->index_state->index_bytes = fs.get_size(indexable->path);
 368         }
 369
 370         return result;
 371 }
 372
 373 void IndexFile::close_source()
 374 {
 375         delete source;
 376         source = 0;
 377
 378         delete render_engine;
 379         render_engine = 0;
 380         if( cache ) {
 381                 cache->remove_user();
 382                 cache = 0;
 383         }
 384 }
 385
 386 int64_t IndexFile::get_required_scale()
 387 {
 388         int64_t result = 1;
 389
 390
 391 // get scale of index file
 392 // Total peaks which may be stored in buffer
 393         int64_t peak_count = mwindow->preferences->index_size /
 394                 (2 * sizeof(float) * source_channels);
 395         for(result = 1;
 396                 source_length / result > peak_count;
 397                 result *= 2)
 398                 ;
 399
 400 // Takes too long to draw from source on a CDROM.  Make indexes for
 401 // everything.
 402
 403         return result;
 404 }
 405
 406 int IndexFile::get_index_filename(char *source_filename,
 407         char *index_directory,
 408         char *index_filename,
 409         const char *input_filename,
 410         const char *suffix)
 411 {
 412         const char *input_fn = input_filename;
 413         char volume_id[BCTEXTLEN];
 414 // Replace mount/directory with volume_id if isofs
 415         if( !udf_volume_id(input_filename, volume_id) )
 416         {
 417                 char *cp = strrchr((char*)input_filename,'/');
 418                 if( cp ) input_fn = cp + 1;
 419                 for( cp=volume_id; *cp; ++cp );
 420                 *cp++ = '_';  strcpy(cp, input_fn);
 421                 input_fn = volume_id;
 422         }
 423 // Replace slashes and dots
 424         int i, j;
 425         int len = strlen(input_fn);
 426         for(i = 0, j = 0; i < len; i++)
 427         {
 428                 if(input_fn[i] != '/' &&
 429                         input_fn[i] != '.')
 430                         source_filename[j++] = input_fn[i];
 431                 else
 432                 {
 433                         if(i > 0)
 434                                 source_filename[j++] = '_';
 435                 }
 436         }
 437         source_filename[j] = 0;
 438         FileSystem fs;
 439         fs.join_names(index_filename, index_directory, source_filename);
 440         strcat(index_filename, suffix ? suffix : ".idx");
 441         return 0;
 442 }
 443
 444 int IndexFile::interrupt_index()
 445 {
 446         interrupt_flag = 1;
 447         return 0;
 448 }
 449
 450 // Read data into buffers
 451
 452 int IndexFile::create_index(MainProgressBar *progress)
 453 {
 454         int result = 0;
 455 SET_TRACE
 456
 457         interrupt_flag = 0;
 458
 459 // open the source file
 460         if(open_source()) return 1;
 461         source_channels = indexable->get_audio_channels();
 462         source_samplerate = indexable->get_sample_rate();
 463         source_length = indexable->get_audio_samples();
 464
 465 SET_TRACE
 466
 467         get_index_filename(source_filename,
 468                 mwindow->preferences->index_directory,
 469                 index_filename,
 470                 indexable->path);
 471
 472 SET_TRACE
 473
 474 // Some file formats have their own sample index.
 475 // Test for index in stream table of contents
 476         if(source && !source->get_index(this, progress))
 477         {
 478                 IndexState *index_state = get_state();
 479                 index_state->index_status = INDEX_READY;
 480                 redraw_edits(1);
 481         }
 482         else
 483 // Build index from scratch
 484         {
 485 SET_TRACE
 486
 487 // Indexes are now built for everything since it takes too long to draw
 488 // from CDROM source.
 489
 490 // get amount to read at a time in floats
 491                 int64_t buffersize = 65536;
 492                 char string[BCTEXTLEN];
 493                 sprintf(string, _("Creating %s."), index_filename);
 494
 495                 progress->update_title(string);
 496                 progress->update_length(source_length);
 497                 redraw_timer->update();
 498 SET_TRACE
 499
 500 // thread out index thread
 501                 IndexThread *index_thread = new IndexThread(mwindow,
 502                         this,
 503                         index_filename,
 504                         buffersize,
 505                         source_length);
 506                 index_thread->start_build();
 507
 508 // current sample in source file
 509                 int64_t position = 0;
 510                 int64_t fragment_size = buffersize;
 511                 int current_buffer = 0;
 512
 513
 514 // pass through file once
 515 // printf("IndexFile::create_index %d source_length=%jd source=%p progress=%p\n",
 516 // __LINE__,
 517 // source_length,
 518 // source,
 519 // progress);
 520 SET_TRACE
 521                 while(position < source_length && !result)
 522                 {
 523 SET_TRACE
 524                         if(source_length - position < fragment_size && fragment_size == buffersize) fragment_size = source_length - position;
 525
 526                         index_thread->input_lock[current_buffer]->lock("IndexFile::create_index 1");
 527                         index_thread->input_len[current_buffer] = fragment_size;
 528
 529 SET_TRACE
 530                         int cancelled = progress->update(position);
 531 //printf("IndexFile::create_index cancelled=%d\n", cancelled);
 532 SET_TRACE
 533                         if(cancelled ||
 534                                 index_thread->interrupt_flag ||
 535                                 interrupt_flag)
 536                         {
 537                                 result = 3;
 538                         }
 539
 540
 541 SET_TRACE
 542                         if(source && !result)
 543                         {
 544 SET_TRACE
 545                                 for(int channel = 0;
 546                                         !result && channel < source_channels;
 547                                         channel++)
 548                                 {
 549 // Read from source file
 550                                         source->set_audio_position(position);
 551                                         source->set_channel(channel);
 552
 553                                         if(source->read_samples(
 554                                                 index_thread->buffer_in[current_buffer][channel],
 555                                                 fragment_size))
 556                                                 result = 1;
 557                                 }
 558 SET_TRACE
 559                         }
 560                         else
 561                         if(render_engine && !result)
 562                         {
 563 SET_TRACE
 564                                 if(render_engine->arender)
 565                                 {
 566                                         result = render_engine->arender->process_buffer(
 567                                                 index_thread->buffer_in[current_buffer],
 568                                                 fragment_size,
 569                                                 position);
 570                                 }
 571                                 else
 572                                 {
 573                                         for(int i = 0; i < source_channels; i++)
 574                                         {
 575                                                 bzero(index_thread->buffer_in[current_buffer][i]->get_data(),
 576                                                         fragment_size * sizeof(double));
 577                                         }
 578                                 }
 579 SET_TRACE
 580                         }
 581 SET_TRACE
 582
 583 // Release buffer to thread
 584                         if(!result)
 585                         {
 586                                 index_thread->output_lock[current_buffer]->unlock();
 587                                 current_buffer++;
 588                                 if(current_buffer >= TOTAL_INDEX_BUFFERS) current_buffer = 0;
 589                                 position += fragment_size;
 590                         }
 591                         else
 592                         {
 593                                 index_thread->input_lock[current_buffer]->unlock();
 594                         }
 595 SET_TRACE
 596                 }
 597
 598
 599 // end thread cleanly
 600                 index_thread->input_lock[current_buffer]->lock("IndexFile::create_index 2");
 601                 index_thread->last_buffer[current_buffer] = 1;
 602                 index_thread->output_lock[current_buffer]->unlock();
 603                 index_thread->stop_build();
 604
 605
 606                 delete index_thread;
 607
 608         }
 609
 610
 611
 612         close_source();
 613
 614
 615
 616         open_index();
 617
 618         close_index();
 619
 620         mwindow->edl->set_index_file(indexable);
 621         return 0;
 622 }
 623
 624
 625
 626 int IndexFile::redraw_edits(int force)
 627 {
 628         int64_t difference = redraw_timer->get_scaled_difference(1000);
 629
 630         if(difference > 250 || force)
 631         {
 632                 redraw_timer->update();
 633                 mwindow->gui->lock_window("IndexFile::redraw_edits");
 634                 mwindow->edl->set_index_file(indexable);
 635                 mwindow->gui->draw_indexes(indexable);
 636                 mwindow->gui->unlock_window();
 637         }
 638         return 0;
 639 }
 640
 641
 642
 643
 644 int IndexFile::draw_index(
 645         TrackCanvas *canvas,
 646         ResourcePixmap *pixmap,
 647         Edit *edit,
 648         int x,
 649         int w)
 650 {
 651         const int debug = 0;
 652         IndexState *index_state = get_state();
 653         int pane_number = canvas->pane->number;
 654 //index_state->dump();
 655
 656 SET_TRACE
 657         if(debug) printf("IndexFile::draw_index %d\n", __LINE__);
 658         if(index_state->index_zoom == 0)
 659         {
 660                 printf(_("IndexFile::draw_index: index has 0 zoom\n"));
 661                 return 0;
 662         }
 663         if(debug) printf("IndexFile::draw_index %d\n", __LINE__);
 664
 665 // test channel number
 666         if(edit->channel > source_channels) return 1;
 667         if(debug) printf("IndexFile::draw_index %d source_samplerate=%d "
 668                         "w=%d samplerate=%jd zoom_sample=%jd\n",
 669                 __LINE__, source_samplerate, w,
 670                 mwindow->edl->session->sample_rate,
 671                 mwindow->edl->local_session->zoom_sample);
 672
 673 // calculate a virtual x where the edit_x should be in floating point
 674         double virtual_edit_x = 1.0 *
 675                 edit->track->from_units(edit->startproject) *
 676                 mwindow->edl->session->sample_rate /
 677                 mwindow->edl->local_session->zoom_sample -
 678                 mwindow->edl->local_session->view_start[pane_number];
 679
 680 // samples in segment to draw relative to asset
 681         FloatAutos *speed_autos = !edit->track->has_speed() ? 0 :
 682                 (FloatAutos *)edit->track->automation->autos[AUTOMATION_SPEED];
 683         double project_zoom = mwindow->edl->local_session->zoom_sample;
 684         int64_t edit_position = (x + pixmap->pixmap_x - virtual_edit_x) * project_zoom;
 685         int64_t start_position = edit->startsource;
 686         start_position += !speed_autos ? edit_position :
 687                 speed_autos->automation_integral(edit->startproject, edit_position, PLAY_FORWARD);
 688         int64_t end_position = edit->startsource;
 689         edit_position = (x + w + pixmap->pixmap_x - virtual_edit_x) * project_zoom;
 690         end_position += !speed_autos ? edit_position :
 691                 speed_autos->automation_integral(edit->startproject, edit_position, PLAY_FORWARD);
 692         double session_sample_rate = mwindow->edl->session->sample_rate;
 693         double asset_over_session = (double)indexable->get_sample_rate() / session_sample_rate;
 694         int64_t start_source = start_position * asset_over_session;
 695         if( start_source < 0 ) start_source = 0;
 696         int64_t start_index = start_source / index_state->index_zoom;
 697         int64_t end_source = end_position * asset_over_session;
 698         if( end_source < 0 ) end_source = 0;
 699         int64_t end_index = end_source / index_state->index_zoom;
 700 // start/length of index to read in floats
 701         start_index *= 2;  end_index *= 2;
 702 // length of index available in floats
 703         int64_t size_index = index_state->index_status == INDEX_BUILDING ?
 704                 index_state->get_channel_used(edit->channel) * 2 :
 705                 index_state->get_index_size(edit->channel);
 706 // Clamp length of index to read by available data
 707         if( end_index >= size_index ) end_index = size_index;
 708         int64_t length_index = end_index - start_index;
 709         if( length_index <= 0 ) return 0;
 710
 711 // Start and length of fragment to read from file in bytes.
 712         float *buffer = 0;
 713         int buffer_shared = 0;
 714         int rect_audio = mwindow->preferences->rectify_audio;
 715         int data_h = edit->track->data_h;
 716         int center_pixel = !rect_audio ? data_h/2 : data_h;
 717         if( edit->track->show_titles() )
 718                 center_pixel += mwindow->theme->get_image("title_bg_data")->get_h();
 719
 720         if( index_state->index_status == INDEX_BUILDING ) {
 721 // index is in RAM, being built
 722                 buffer = index_state->get_channel_buffer(edit->channel);
 723                 if( !buffer ) return 0;
 724                 buffer += start_index;
 725                 buffer_shared = 1;
 726         }
 727         else {
 728                 buffer = new float[length_index + 1];
 729                 int64_t length_buffer = length_index * sizeof(float);
 730 // add file/channel offset
 731                 int64_t index_offset = index_state->get_index_offset(edit->channel);
 732                 int64_t file_offset = (index_offset + start_index) * sizeof(float);
 733                 int64_t file_pos = index_state->index_start + file_offset;
 734                 int64_t read_length = file_length - file_pos;
 735                 if( read_length > length_buffer )
 736                         read_length = length_buffer;
 737                 int64_t length_read = 0;
 738                 if( read_length > 0 ) {
 739                         fseek(fd, file_pos, SEEK_SET);
 740                         length_read = fread(buffer, 1, read_length + sizeof(float), fd);
 741                         length_read &= ~(sizeof(float)-1);
 742                 }
 743                 if( (read_length-=length_read) > 0 )
 744                         memset((char*)buffer + length_read, 0, read_length);
 745                 buffer_shared = 0;
 746         }
 747
 748         canvas->set_color(mwindow->theme->audio_color);
 749
 750         int prev_y1 = center_pixel;
 751         int prev_y2 = center_pixel;
 752         int first_frame = 1;
 753         int zoom_y = mwindow->edl->local_session->zoom_y * data_h /
 754                         mwindow->edl->local_session->zoom_atrack;
 755         if( !rect_audio ) zoom_y /= 2;
 756         int max_y = center_pixel + zoom_y - 1;
 757         edit_position = (x + pixmap->pixmap_x - virtual_edit_x) * project_zoom;
 758         int64_t speed_position = edit->startsource;
 759         speed_position += !speed_autos ? edit_position :
 760                 speed_autos->automation_integral(edit->startproject, edit_position, PLAY_FORWARD);
 761         int64_t source_position  = speed_position * asset_over_session;
 762         int64_t index_position = source_position / index_state->index_zoom;
 763         int64_t i = 2 * index_position - start_index;
 764         CLAMP(i, 0, length_index);
 765 SET_TRACE
 766
 767         for( int64_t x1=0; x1<w && i < length_index; ++x1 ) {
 768                 float highsample = !rect_audio ? buffer[i] : fabsf(buffer[i]);  ++i;
 769                 float lowsample  = !rect_audio ? buffer[i] : fabsf(buffer[i]);  ++i;
 770                 int x2 = x1 + x + 1;
 771                 edit_position = (x2 + pixmap->pixmap_x - virtual_edit_x) * project_zoom;
 772                 int64_t speed_position = edit->startsource;
 773                 speed_position += !speed_autos ? edit_position :
 774                         speed_autos->automation_integral(edit->startproject, edit_position, PLAY_FORWARD);
 775                 source_position  = speed_position * asset_over_session;
 776                 index_position = source_position / index_state->index_zoom;
 777                 int64_t k = 2 * index_position - start_index;
 778                 CLAMP(k, 0, length_index);
 779                 while( i < k ) {
 780                         float high = !rect_audio ? buffer[i] : fabsf(buffer[i]);
 781                         highsample = MAX(highsample, high); ++i;
 782                         float low  = !rect_audio ? buffer[i] : fabsf(buffer[i]);
 783                         lowsample = MIN(lowsample, low);   ++i;
 784                 }
 785
 786                 int y1 = (int)(center_pixel - highsample * zoom_y);
 787                 int y2 = (int)(center_pixel - lowsample * zoom_y);
 788                 CLAMP(y1, 0, max_y);  int next_y1 = y1;
 789                 CLAMP(y2, 0, max_y);  int next_y2 = y2;
 790 //printf("draw_line (%f,%f) = %d,%d,  %d,%d\n", lowsample, highsample, x2, y1, x2, y2);
 791
 792 //SET_TRACE
 793 // A different algorithm has to be used if it's 1 sample per pixel and the
 794 // index is used.  Now the min and max values are equal so we join the max samples.
 795                 if(mwindow->edl->local_session->zoom_sample == 1) {
 796                         canvas->draw_bline(x2 - 1, !rect_audio ? prev_y1 : center_pixel, x2, y1, pixmap);
 797                 }
 798                 else {
 799 // Extend line height if it doesn't connect to previous line
 800                         if(!first_frame) {
 801                                 if(y1 > prev_y2) y1 = prev_y2 + 1;
 802                                 if(y2 < prev_y1) y2 = prev_y1 - 1;
 803                         }
 804                         else {
 805                                 first_frame = 0;
 806                         }
 807                         canvas->draw_bline(x2, y1, x2, !rect_audio ? y2 : center_pixel, pixmap);
 808                 }
 809                 prev_y1 = next_y1;
 810                 prev_y2 = next_y2;
 811         }
 812
 813 SET_TRACE
 814
 815         if(!buffer_shared) delete [] buffer;
 816 SET_TRACE
 817         if(debug) printf("IndexFile::draw_index %d\n", __LINE__);
 818         return 0;
 819 }
 820
 821 int IndexFile::close_index()
 822 {
 823         if(fd)
 824         {
 825                 fclose(fd);
 826                 fd = 0;
 827         }
 828         return 0;
 829 }
 830
 831 int IndexFile::remove_index()
 832 {
 833         IndexState *index_state = get_state();
 834         if(index_state->index_status == INDEX_READY ||
 835                 index_state->index_status == INDEX_NOTTESTED)
 836         {
 837                 close_index();
 838                 remove(index_filename);
 839         }
 840         return 0;
 841 }
 842
 843 int IndexFile::read_info(Indexable *test_indexable)
 844 {
 845         const int debug = 0;
 846
 847 // Store format in actual asset.
 848 // If it's a nested EDL, we never want the format, just the index info.
 849         if(!test_indexable) test_indexable = indexable;
 850         if(!test_indexable) return 1;
 851
 852         IndexState * index_state = test_indexable->index_state;
 853         if(index_state->index_status == INDEX_NOTTESTED)
 854         {
 855 // read start of index data
 856                 int temp = fread((char*)&(index_state->index_start), sizeof(int64_t), 1, fd);
 857 //printf("IndexFile::read_info %d %f\n", __LINE__, test_indexable->get_frame_rate());
 858
 859                 if(!temp) return 1;
 860 // read test_indexable info from index
 861                 char *data;
 862
 863                 data = new char[index_state->index_start];
 864                 temp = fread(data, index_state->index_start - sizeof(int64_t), 1, fd);
 865                 if(!temp) { delete [] data;
 866                 return 1;}
 867
 868                 data[index_state->index_start - sizeof(int64_t)] = 0;
 869                 FileXML xml;
 870                 xml.read_from_string(data);
 871                 delete [] data;
 872
 873
 874
 875 // Read the file format & index state.
 876                 if(test_indexable->is_asset)
 877                 {
 878                         Asset *test_asset = (Asset *)test_indexable;
 879                         Asset *asset = new Asset;
 880                         asset->read(&xml);
 881                         int ret = 0;
 882 //printf("IndexFile::read_info %d %f\n", __LINE__, asset->get_frame_rate());
 883
 884                         if( asset->format == FILE_UNKNOWN ||
 885                             test_asset->format != asset->format ) {
 886 if(debug) printf("IndexFile::read_info %d\n", __LINE__);
 887                                 ret = 1;
 888                         }
 889                         asset->remove_user();
 890                         if( ret ) return ret;
 891                 }
 892                 else
 893                 {
 894 // Read only the index state for a nested EDL
 895                         int result = 0;
 896 if(debug) printf("IndexFile::read_info %d\n", __LINE__);
 897                         while(!result)
 898                         {
 899                                 result = xml.read_tag();
 900                                 if(!result)
 901                                 {
 902                                         if(xml.tag.title_is("INDEX"))
 903                                         {
 904                                                 index_state->read_xml(&xml, source_channels);
 905 if(debug) printf("IndexFile::read_info %d\n", __LINE__);
 906 if(debug) index_state->dump();
 907                                                 result = 1;
 908                                         }
 909                                 }
 910                         }
 911                 }
 912         }
 913
 914         return 0;
 915 }
 916
 917
 918
 919
 920
 921
 922
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