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