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