modules/access/vdr.c

   1 /*****************************************************************************
   2  * vdr.c: VDR recordings access plugin
   3  *****************************************************************************
   4  * Copyright (C) 2010 Tobias Güntner
   5  *
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms of the GNU Lesser General Public License as published by
   8  * the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
  15  *
  16  * You should have received a copy of the GNU Lesser General Public License
  17  * along with this program; if not, write to the Free Software Foundation,
  18  * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  19  *****************************************************************************/
  20
  21 /***
  22 VDR splits recordings into multiple files and stores each recording in a
  23 separate directory. If VLC opens a normal directory, the filesystem module
  24 will add all files to the playlist. If, however, VLC opens a VDR recording,
  25 this module will join all files within that directory and provide a single
  26 continuous stream instead.
  27
  28 VDR recordings have either of two directory layouts:
  29     1) PES format:
  30         /path/to/0000-00-00.00.00.00.00.rec/
  31             001.vdr, 002.vdr, 003.vdr, ...
  32             index.vdr, info.vdr, marks.vdr, ...
  33     2) TS format:
  34         /path/to/0000-00-00.00.00.0-0.rec/
  35             00001.ts, 00002.ts, 00003.ts, ...
  36             index, info, marks, ...
  37 See http://www.vdr-wiki.de/ and http://www.tvdr.de/ for more information.
  38 ***/
  39
  40 /*****************************************************************************
  41  * Preamble
  42  *****************************************************************************/
  43
  44 #ifdef HAVE_CONFIG_H
  45 # include "config.h"
  46 #endif
  47
  48 #include <sys/types.h>
  49 #include <sys/stat.h>
  50 #include <fcntl.h>
  51 #include <unistd.h>
  52
  53 #include <ctype.h>
  54 #include <time.h>
  55 #include <errno.h>
  56
  57 #include <vlc_common.h>
  58 #include <vlc_plugin.h>
  59 #include <vlc_access.h>
  60 #include <vlc_input.h>
  61 #include <vlc_fs.h>
  62 #include <vlc_charset.h>
  63 #include <vlc_dialog.h>
  64 #include <vlc_configuration.h>
  65
  66 /*****************************************************************************
  67  * Module descriptor
  68  *****************************************************************************/
  69 static int  Open ( vlc_object_t * );
  70 static void Close( vlc_object_t * );
  71
  72 #define HELP_TEXT N_("Support for VDR recordings (http://www.tvdr.de/).")
  73
  74 #define CHAPTER_OFFSET_TEXT N_("Chapter offset in ms")
  75 #define CHAPTER_OFFSET_LONGTEXT N_( \
  76     "Move all chapters. This value should be set in milliseconds." )
  77
  78 #define FPS_TEXT N_("Frame rate")
  79 #define FPS_LONGTEXT N_( \
  80     "Default frame rate for chapter import." )
  81
  82 vlc_module_begin ()
  83     set_category( CAT_INPUT )
  84     set_shortname( N_("VDR") )
  85     set_help( HELP_TEXT )
  86     set_subcategory( SUBCAT_INPUT_ACCESS )
  87     set_description( N_("VDR recordings") )
  88     add_integer( "vdr-chapter-offset", 0,
  89         CHAPTER_OFFSET_TEXT, CHAPTER_OFFSET_LONGTEXT, true )
  90     add_float_with_range( "vdr-fps", 25, 1, 1000,
  91         FPS_TEXT, FPS_LONGTEXT, true )
  92     set_capability( "access", 60 )
  93     add_shortcut( "vdr" )
  94     add_shortcut( "directory" )
  95     add_shortcut( "dir" )
  96     add_shortcut( "file" )
  97     set_callbacks( Open, Close )
  98 vlc_module_end ()
  99
 100 /*****************************************************************************
 101  * Local prototypes, constants, structures
 102  *****************************************************************************/
 103
 104 /* minimum chapter size in seconds */
 105 #define MIN_CHAPTER_SIZE 5
 106
 107 TYPEDEF_ARRAY( uint64_t, size_array_t );
 108
 109 struct access_sys_t
 110 {
 111     /* file sizes of all parts */
 112     size_array_t file_sizes;
 113     uint64_t offset;
 114     uint64_t size; /* total size */
 115
 116     /* index and fd of current open file */
 117     unsigned i_current_file;
 118     int fd;
 119
 120     /* meta data */
 121     vlc_meta_t *p_meta;
 122
 123     /* cut marks */
 124     input_title_t *p_marks;
 125     uint64_t *offsets;
 126     unsigned cur_seekpoint;
 127     float fps;
 128
 129     /* file format: true=TS, false=PES */
 130     bool b_ts_format;
 131 };
 132
 133 #define CURRENT_FILE_SIZE ARRAY_VAL(p_sys->file_sizes, p_sys->i_current_file)
 134 #define FILE_SIZE(pos)    ARRAY_VAL(p_sys->file_sizes, pos)
 135 #define FILE_COUNT        (unsigned)p_sys->file_sizes.i_size
 136
 137 static int Control( access_t *, int, va_list );
 138 static ssize_t Read( access_t *p_access, void *p_buffer, size_t i_len );
 139 static int Seek( access_t *p_access, uint64_t i_pos);
 140 static void FindSeekpoint( access_t *p_access );
 141 static bool ScanDirectory( access_t *p_access );
 142 static char *GetFilePath( access_t *p_access, unsigned i_file );
 143 static bool ImportNextFile( access_t *p_access );
 144 static bool SwitchFile( access_t *p_access, unsigned i_file );
 145 static void OptimizeForRead( int fd );
 146 static void UpdateFileSize( access_t *p_access );
 147 static FILE *OpenRelativeFile( access_t *p_access, const char *psz_file );
 148 static bool ReadLine( char **ppsz_line, size_t *pi_size, FILE *p_file );
 149 static void ImportMeta( access_t *p_access );
 150 static void ImportMarks( access_t *p_access );
 151 static bool ReadIndexRecord( FILE *p_file, bool b_ts, int64_t i_frame,
 152                             uint64_t *pi_offset, uint16_t *pi_file_num );
 153 static int64_t ParseFrameNumber( const char *psz_line, float fps );
 154 static const char *BaseName( const char *psz_path );
 155
 156 /*****************************************************************************
 157  * Open a directory
 158  *****************************************************************************/
 159 static int Open( vlc_object_t *p_this )
 160 {
 161     access_t *p_access = (access_t*)p_this;
 162
 163     if( !p_access->psz_filepath )
 164         return VLC_EGENERIC;
 165
 166     /* Some tests can be skipped if this module was explicitly requested.
 167      * That way, the user can play "corrupt" recordings if necessary
 168      * and we can avoid false positives in the general case. */
 169     bool b_strict = strcmp( p_access->psz_name, "vdr" );
 170
 171     /* Do a quick test based on the directory name to see if this
 172      * directory might contain a VDR recording. We can be reasonably
 173      * sure if ScanDirectory() actually finds files. */
 174     if( b_strict )
 175     {
 176         char psz_extension[4];
 177         int i_length = 0;
 178         const char *psz_name = BaseName( p_access->psz_filepath );
 179         if( sscanf( psz_name, "%*u-%*u-%*u.%*u.%*u.%*u%*[-.]%*u.%3s%n",
 180             psz_extension, &i_length ) != 1 || strcasecmp( psz_extension, "rec" ) ||
 181             ( psz_name[i_length] != DIR_SEP_CHAR && psz_name[i_length] != '\0' ) )
 182             return VLC_EGENERIC;
 183     }
 184
 185     /* Only directories can be recordings */
 186     struct stat st;
 187     if( vlc_stat( p_access->psz_filepath, &st ) ||
 188         !S_ISDIR( st.st_mode ) )
 189         return VLC_EGENERIC;
 190
 191     access_sys_t *p_sys = vlc_calloc( p_this, 1, sizeof( *p_sys ) );
 192
 193     if( unlikely(p_sys == NULL) )
 194         return VLC_ENOMEM;
 195
 196     p_access->p_sys = p_sys;
 197     p_sys->fd = -1;
 198     p_sys->cur_seekpoint = 0;
 199     p_sys->fps = var_InheritFloat( p_access, "vdr-fps" );
 200     ARRAY_INIT( p_sys->file_sizes );
 201
 202     /* Import all files and prepare playback. */
 203     if( !ScanDirectory( p_access ) ||
 204         !SwitchFile( p_access, 0 ) )
 205     {
 206         Close( p_this );
 207         return VLC_EGENERIC;
 208     }
 209
 210     ACCESS_SET_CALLBACKS( Read, NULL, Control, Seek );
 211     return VLC_SUCCESS;
 212 }
 213
 214 /*****************************************************************************
 215  * Close files and free resources
 216  *****************************************************************************/
 217 static void Close( vlc_object_t * p_this )
 218 {
 219     access_t *p_access = (access_t*)p_this;
 220     access_sys_t *p_sys = p_access->p_sys;
 221
 222     if( p_sys->fd != -1 )
 223         vlc_close( p_sys->fd );
 224     ARRAY_RESET( p_sys->file_sizes );
 225
 226     if( p_sys->p_meta )
 227         vlc_meta_Delete( p_sys->p_meta );
 228
 229     size_t count = p_sys->p_marks->i_seekpoint;
 230     TAB_CLEAN( count, p_sys->offsets );
 231     vlc_input_title_Delete( p_sys->p_marks );
 232 }
 233
 234 /*****************************************************************************
 235  * Determine format and import files
 236  *****************************************************************************/
 237 static bool ScanDirectory( access_t *p_access )
 238 {
 239     access_sys_t *p_sys = p_access->p_sys;
 240
 241     /* find first part and determine directory format */
 242     p_sys->b_ts_format = true;
 243     if( !ImportNextFile( p_access ) )
 244     {
 245         p_sys->b_ts_format = !p_sys->b_ts_format;
 246         if( !ImportNextFile( p_access ) )
 247             return false;
 248     }
 249
 250     /* get all remaining parts */
 251     while( ImportNextFile( p_access ) )
 252         continue;
 253
 254     /* import meta data etc. */
 255     ImportMeta( p_access );
 256
 257     /* cut marks depend on meta data and file sizes */
 258     ImportMarks( p_access );
 259
 260     return true;
 261 }
 262
 263 /*****************************************************************************
 264  * Control input stream
 265  *****************************************************************************/
 266 static int Control( access_t *p_access, int i_query, va_list args )
 267 {
 268     access_sys_t *p_sys = p_access->p_sys;
 269     input_title_t ***ppp_title;
 270     int i;
 271     int64_t *pi64;
 272     vlc_meta_t *p_meta;
 273
 274     switch( i_query )
 275     {
 276         case STREAM_CAN_SEEK:
 277         case STREAM_CAN_FASTSEEK:
 278         case STREAM_CAN_PAUSE:
 279         case STREAM_CAN_CONTROL_PACE:
 280             *va_arg( args, bool* ) = true;
 281             break;
 282
 283         case STREAM_GET_SIZE:
 284             *va_arg( args, uint64_t* ) = p_sys->size;
 285             break;
 286
 287         case STREAM_GET_PTS_DELAY:
 288             pi64 = va_arg( args, int64_t * );
 289             *pi64 = INT64_C(1000)
 290                   * var_InheritInteger( p_access, "file-caching" );
 291             break;
 292
 293         case STREAM_SET_PAUSE_STATE:
 294             /* nothing to do */
 295             break;
 296
 297         case STREAM_GET_TITLE_INFO:
 298             /* return a copy of our seek points */
 299             if( !p_sys->p_marks )
 300                 return VLC_EGENERIC;
 301             ppp_title = va_arg( args, input_title_t*** );
 302             *va_arg( args, int* ) = 1;
 303             *ppp_title = malloc( sizeof( **ppp_title ) );
 304             if( !*ppp_title )
 305                 return VLC_ENOMEM;
 306             **ppp_title = vlc_input_title_Duplicate( p_sys->p_marks );
 307             break;
 308
 309         case STREAM_GET_TITLE:
 310             *va_arg( args, unsigned * ) = 0;
 311             break;
 312
 313         case STREAM_GET_SEEKPOINT:
 314             *va_arg( args, unsigned * ) = p_sys->cur_seekpoint;
 315             break;
 316
 317         case STREAM_GET_CONTENT_TYPE:
 318             *va_arg( args, char ** ) =
 319                 strdup( p_sys->b_ts_format ? "video/MP2T" : "video/MP2P" );
 320             break;
 321
 322         case STREAM_SET_TITLE:
 323             /* ignore - only one title */
 324             break;
 325
 326         case STREAM_SET_SEEKPOINT:
 327             i = va_arg( args, int );
 328             return Seek( p_access, p_sys->offsets[i] );
 329
 330         case STREAM_GET_META:
 331             p_meta = va_arg( args, vlc_meta_t* );
 332             vlc_meta_Merge( p_meta, p_sys->p_meta );
 333             break;
 334
 335         default:
 336             return VLC_EGENERIC;
 337     }
 338     return VLC_SUCCESS;
 339 }
 340
 341 /*****************************************************************************
 342  * Read and concatenate files
 343  *****************************************************************************/
 344 static ssize_t Read( access_t *p_access, void *p_buffer, size_t i_len )
 345 {
 346     access_sys_t *p_sys = p_access->p_sys;
 347
 348     if( p_sys->fd == -1 )
 349         /* no more data */
 350         return 0;
 351
 352     ssize_t i_ret = read( p_sys->fd, p_buffer, i_len );
 353
 354     if( i_ret > 0 )
 355     {
 356         /* success */
 357         p_sys->offset += i_ret;
 358         UpdateFileSize( p_access );
 359         FindSeekpoint( p_access );
 360         return i_ret;
 361     }
 362     else if( i_ret == 0 )
 363     {
 364         /* check for new files in case the recording is still active */
 365         if( p_sys->i_current_file >= FILE_COUNT - 1 )
 366             ImportNextFile( p_access );
 367         /* play next file */
 368         SwitchFile( p_access, p_sys->i_current_file + 1 );
 369         return -1;
 370     }
 371     else if( errno == EINTR )
 372     {
 373         /* try again later */
 374         return -1;
 375     }
 376     else
 377     {
 378         /* abort on read error */
 379         msg_Err( p_access, "failed to read (%s)", vlc_strerror_c(errno) );
 380         vlc_dialog_display_error( p_access, _("File reading failed"),
 381             _("VLC could not read the file (%s)."),
 382             vlc_strerror(errno) );
 383         SwitchFile( p_access, -1 );
 384         return 0;
 385     }
 386 }
 387
 388 /*****************************************************************************
 389  * Seek to a specific location in a file
 390  *****************************************************************************/
 391 static int Seek( access_t *p_access, uint64_t i_pos )
 392 {
 393     access_sys_t *p_sys = p_access->p_sys;
 394
 395     /* might happen if called by STREAM_SET_SEEKPOINT */
 396     i_pos = __MIN( i_pos, p_sys->size );
 397
 398     p_sys->offset = i_pos;
 399
 400     /* find correct chapter */
 401     FindSeekpoint( p_access );
 402
 403     /* find correct file */
 404     unsigned i_file = 0;
 405     while( i_file < FILE_COUNT - 1 &&
 406            i_pos >= FILE_SIZE( i_file ) )
 407     {
 408         i_pos -= FILE_SIZE( i_file );
 409         i_file++;
 410     }
 411     if( !SwitchFile( p_access, i_file ) )
 412         return VLC_EGENERIC;
 413
 414     /* adjust position within that file */
 415     return lseek( p_sys->fd, i_pos, SEEK_SET ) != -1 ?
 416         VLC_SUCCESS : VLC_EGENERIC;
 417 }
 418
 419 /*****************************************************************************
 420  * Change the chapter index to match the current position
 421  *****************************************************************************/
 422 static void FindSeekpoint( access_t *p_access )
 423 {
 424     access_sys_t *p_sys = p_access->p_sys;
 425     if( !p_sys->p_marks )
 426         return;
 427
 428     int new_seekpoint = p_sys->cur_seekpoint;
 429     if( p_sys->offset < p_sys->offsets[p_sys->cur_seekpoint] )
 430     {
 431         /* i_pos moved backwards, start fresh */
 432         new_seekpoint = 0;
 433     }
 434
 435     /* only need to check the following seekpoints */
 436     while( new_seekpoint + 1 < p_sys->p_marks->i_seekpoint &&
 437         p_sys->offset >= p_sys->offsets[new_seekpoint + 1] )
 438     {
 439         new_seekpoint++;
 440     }
 441
 442     p_sys->cur_seekpoint = new_seekpoint;
 443 }
 444
 445 /*****************************************************************************
 446  * Returns the path of a certain part
 447  *****************************************************************************/
 448 static char *GetFilePath( access_t *p_access, unsigned i_file )
 449 {
 450     access_sys_t *sys = p_access->p_sys;
 451     char *psz_path;
 452
 453     if( asprintf( &psz_path, sys->b_ts_format ?
 454         "%s" DIR_SEP "%05u.ts" : "%s" DIR_SEP "%03u.vdr",
 455         p_access->psz_filepath, i_file + 1 ) == -1 )
 456         return NULL;
 457     else
 458         return psz_path;
 459 }
 460
 461 /*****************************************************************************
 462  * Check if another part exists and import it
 463  *****************************************************************************/
 464 static bool ImportNextFile( access_t *p_access )
 465 {
 466     access_sys_t *p_sys = p_access->p_sys;
 467
 468     char *psz_path = GetFilePath( p_access, FILE_COUNT );
 469     if( !psz_path )
 470         return false;
 471
 472     struct stat st;
 473     if( vlc_stat( psz_path, &st ) )
 474     {
 475         msg_Dbg( p_access, "could not stat %s: %s", psz_path,
 476                  vlc_strerror_c(errno) );
 477         free( psz_path );
 478         return false;
 479     }
 480     if( !S_ISREG( st.st_mode ) )
 481     {
 482         msg_Dbg( p_access, "%s is not a regular file", psz_path );
 483         free( psz_path );
 484         return false;
 485     }
 486     msg_Dbg( p_access, "%s exists", psz_path );
 487     free( psz_path );
 488
 489     ARRAY_APPEND( p_sys->file_sizes, st.st_size );
 490     p_sys->size += st.st_size;
 491
 492     return true;
 493 }
 494
 495 /*****************************************************************************
 496  * Close the current file and open another
 497  *****************************************************************************/
 498 static bool SwitchFile( access_t *p_access, unsigned i_file )
 499 {
 500     access_sys_t *p_sys = p_access->p_sys;
 501
 502     /* requested file already open? */
 503     if( p_sys->fd != -1 && p_sys->i_current_file == i_file )
 504         return true;
 505
 506     /* close old file */
 507     if( p_sys->fd != -1 )
 508     {
 509         vlc_close( p_sys->fd );
 510         p_sys->fd = -1;
 511     }
 512
 513     /* switch */
 514     if( i_file >= FILE_COUNT )
 515         return false;
 516     p_sys->i_current_file = i_file;
 517
 518     /* open new file */
 519     char *psz_path = GetFilePath( p_access, i_file );
 520     if( !psz_path )
 521         return false;
 522     p_sys->fd = vlc_open( psz_path, O_RDONLY );
 523
 524     if( p_sys->fd == -1 )
 525     {
 526         msg_Err( p_access, "Failed to open %s: %s", psz_path,
 527                  vlc_strerror_c(errno) );
 528         goto error;
 529     }
 530
 531     /* cannot handle anything except normal files */
 532     struct stat st;
 533     if( fstat( p_sys->fd, &st ) || !S_ISREG( st.st_mode ) )
 534     {
 535         msg_Err( p_access, "%s is not a regular file", psz_path );
 536         goto error;
 537     }
 538
 539     OptimizeForRead( p_sys->fd );
 540
 541     msg_Dbg( p_access, "opened %s", psz_path );
 542     free( psz_path );
 543     return true;
 544
 545 error:
 546     vlc_dialog_display_error (p_access, _("File reading failed"), _("VLC could not"
 547         " open the file \"%s\" (%s)."), psz_path, vlc_strerror(errno) );
 548     if( p_sys->fd != -1 )
 549     {
 550         vlc_close( p_sys->fd );
 551         p_sys->fd = -1;
 552     }
 553     free( psz_path );
 554     return false;
 555 }
 556
 557 /*****************************************************************************
 558  * Some tweaks to speed up read()
 559  *****************************************************************************/
 560 static void OptimizeForRead( int fd )
 561 {
 562     /* cf. Open() in file access module */
 563     VLC_UNUSED(fd);
 564 #ifdef HAVE_POSIX_FADVISE
 565     posix_fadvise( fd, 0, 4096, POSIX_FADV_WILLNEED );
 566     posix_fadvise( fd, 0, 0, POSIX_FADV_NOREUSE );
 567 #endif
 568 #ifdef F_RDAHEAD
 569     fcntl( fd, F_RDAHEAD, 1 );
 570 #endif
 571 #ifdef F_NOCACHE
 572     fcntl( fd, F_NOCACHE, 0 );
 573 #endif
 574 }
 575
 576 /*****************************************************************************
 577  * Fix size if the (last) part is still growing
 578  *****************************************************************************/
 579 static void UpdateFileSize( access_t *p_access )
 580 {
 581     access_sys_t *p_sys = p_access->p_sys;
 582     struct stat st;
 583
 584     if( p_sys->size >= p_sys->offset )
 585         return;
 586
 587     /* TODO: not sure if this can happen or what to do in this case */
 588     if( fstat( p_sys->fd, &st ) )
 589         return;
 590     if( (uint64_t)st.st_size <= CURRENT_FILE_SIZE )
 591         return;
 592
 593     p_sys->size -= CURRENT_FILE_SIZE;
 594     CURRENT_FILE_SIZE = st.st_size;
 595     p_sys->size += CURRENT_FILE_SIZE;
 596 }
 597
 598 /*****************************************************************************
 599  * Open file relative to base directory for reading.
 600  *****************************************************************************/
 601 static FILE *OpenRelativeFile( access_t *p_access, const char *psz_file )
 602 {
 603     access_sys_t *sys = p_access->p_sys;
 604
 605     /* build path and add extension */
 606     char *psz_path;
 607     if( asprintf( &psz_path, "%s" DIR_SEP "%s%s", p_access->psz_filepath,
 608                   psz_file, sys->b_ts_format ? "" : ".vdr" ) == -1 )
 609         return NULL;
 610
 611     FILE *file = vlc_fopen( psz_path, "rb" );
 612     if( !file )
 613         msg_Warn( p_access, "Failed to open %s: %s", psz_path,
 614                   vlc_strerror_c(errno) );
 615     free( psz_path );
 616
 617     return file;
 618 }
 619
 620 /*****************************************************************************
 621  * Read a line of text. Returns false on error or EOF.
 622  *****************************************************************************/
 623 static bool ReadLine( char **ppsz_line, size_t *pi_size, FILE *p_file )
 624 {
 625     ssize_t read = getline( ppsz_line, pi_size, p_file );
 626
 627     if( read == -1 )
 628     {
 629         /* automatically free buffer on eof */
 630         free( *ppsz_line );
 631         *ppsz_line = NULL;
 632         return false;
 633     }
 634
 635     if( read > 0 && (*ppsz_line)[ read - 1 ] == '\n' )
 636         (*ppsz_line)[ read - 1 ] = '\0';
 637     EnsureUTF8( *ppsz_line );
 638
 639     return true;
 640 }
 641
 642 /*****************************************************************************
 643  * Import meta data
 644  *****************************************************************************/
 645 static void ImportMeta( access_t *p_access )
 646 {
 647     access_sys_t *p_sys = p_access->p_sys;
 648
 649     FILE *infofile = OpenRelativeFile( p_access, "info" );
 650     if( !infofile )
 651         return;
 652
 653     vlc_meta_t *p_meta = vlc_meta_New();
 654     p_sys->p_meta = p_meta;
 655     if( !p_meta )
 656     {
 657         fclose( infofile );
 658         return;
 659     }
 660
 661     char *line = NULL;
 662     size_t line_len;
 663     char *psz_title = NULL, *psz_smalltext = NULL, *psz_date = NULL;
 664
 665     while( ReadLine( &line, &line_len, infofile ) )
 666     {
 667         if( !isalpha( (unsigned char)line[0] ) || line[1] != ' ' )
 668             continue;
 669
 670         char tag = line[0];
 671         char *text = line + 2;
 672
 673         if( tag == 'C' )
 674         {
 675             char *psz_name = strchr( text, ' ' );
 676             if( psz_name )
 677             {
 678                 *psz_name = '\0';
 679                 vlc_meta_AddExtra( p_meta, "Channel", psz_name + 1 );
 680             }
 681             vlc_meta_AddExtra( p_meta, "Transponder", text );
 682         }
 683
 684         else if( tag == 'E' )
 685         {
 686             unsigned i_id, i_start, i_length;
 687             if( sscanf( text, "%u %u %u", &i_id, &i_start, &i_length ) == 3 )
 688             {
 689                 char str[50];
 690                 struct tm tm;
 691                 time_t start = i_start;
 692                 localtime_r( &start, &tm );
 693
 694                 /* TODO: locale */
 695                 strftime( str, sizeof(str), "%Y-%m-%d %H:%M", &tm );
 696                 vlc_meta_AddExtra( p_meta, "Date", str );
 697                 free( psz_date );
 698                 psz_date = strdup( str );
 699
 700                 /* display in minutes */
 701                 i_length = ( i_length + 59 ) / 60;
 702                 snprintf( str, sizeof(str), "%u:%02u", i_length / 60, i_length % 60 );
 703                 vlc_meta_AddExtra( p_meta, "Duration", str );
 704             }
 705         }
 706
 707         else if( tag == 'T' )
 708         {
 709             free( psz_title );
 710             psz_title = strdup( text );
 711             vlc_meta_AddExtra( p_meta, "Title", text );
 712         }
 713
 714         else if( tag == 'S' )
 715         {
 716             free( psz_smalltext );
 717             psz_smalltext = strdup( text );
 718             vlc_meta_AddExtra( p_meta, "Info", text );
 719         }
 720
 721         else if( tag == 'D' )
 722         {
 723             for( char *p = text; *p; ++p )
 724             {
 725                 if( *p == '|' )
 726                     *p = '\n';
 727             }
 728             vlc_meta_SetDescription( p_meta, text );
 729         }
 730
 731         /* FPS are required to convert between timestamps and frames */
 732         else if( tag == 'F' )
 733         {
 734             float fps = atof( text );
 735             if( fps >= 1 )
 736                 p_sys->fps = fps;
 737             vlc_meta_AddExtra( p_meta, "Frame Rate", text );
 738         }
 739
 740         else if( tag == 'P' )
 741         {
 742             vlc_meta_AddExtra( p_meta, "Priority", text );
 743         }
 744
 745         else if( tag == 'L' )
 746         {
 747             vlc_meta_AddExtra( p_meta, "Lifetime", text );
 748         }
 749     }
 750
 751     /* create a meaningful title */
 752     int i_len = 10 +
 753         ( psz_title ? strlen( psz_title ) : 0 ) +
 754         ( psz_smalltext ? strlen( psz_smalltext ) : 0 ) +
 755         ( psz_date ? strlen( psz_date ) : 0 );
 756     char *psz_display = malloc( i_len );
 757
 758     if( psz_display )
 759     {
 760         *psz_display = '\0';
 761         if( psz_title )
 762             strcat( psz_display, psz_title );
 763         if( psz_title && psz_smalltext )
 764             strcat( psz_display, " - " );
 765         if( psz_smalltext )
 766             strcat( psz_display, psz_smalltext );
 767         if( ( psz_title || psz_smalltext ) && psz_date )
 768         {
 769             strcat( psz_display, " (" );
 770             strcat( psz_display, psz_date );
 771             strcat( psz_display, ")" );
 772         }
 773         if( *psz_display )
 774             vlc_meta_SetTitle( p_meta, psz_display );
 775     }
 776
 777     free( psz_display );
 778     free( psz_title );
 779     free( psz_smalltext );
 780     free( psz_date );
 781
 782     fclose( infofile );
 783 }
 784
 785 /*****************************************************************************
 786  * Import cut marks and convert them to seekpoints (chapters).
 787  *****************************************************************************/
 788 static void ImportMarks( access_t *p_access )
 789 {
 790     access_sys_t *p_sys = p_access->p_sys;
 791
 792     FILE *marksfile = OpenRelativeFile( p_access, "marks" );
 793     if( !marksfile )
 794         return;
 795
 796     FILE *indexfile = OpenRelativeFile( p_access, "index" );
 797     if( !indexfile )
 798     {
 799         fclose( marksfile );
 800         return;
 801     }
 802
 803     /* get the length of this recording (index stores 8 bytes per frame) */
 804     struct stat st;
 805     if( fstat( fileno( indexfile ), &st ) )
 806     {
 807         fclose( marksfile );
 808         fclose( indexfile );
 809         return;
 810     }
 811     int64_t i_frame_count = st.st_size / 8;
 812
 813     /* Put all cut marks in a "dummy" title */
 814     input_title_t *p_marks = vlc_input_title_New();
 815     if( !p_marks )
 816     {
 817         fclose( marksfile );
 818         fclose( indexfile );
 819         return;
 820     }
 821     p_marks->psz_name = strdup( _("VDR Cut Marks") );
 822     p_marks->i_length = i_frame_count * (int64_t)( CLOCK_FREQ / p_sys->fps );
 823
 824     uint64_t *offsetv = NULL;
 825     size_t offsetc = 0;
 826
 827     /* offset for chapter positions */
 828     int i_chapter_offset = p_sys->fps / 1000 *
 829         var_InheritInteger( p_access, "vdr-chapter-offset" );
 830
 831     /* minimum chapter size in frames */
 832     int i_min_chapter_size = p_sys->fps * MIN_CHAPTER_SIZE;
 833
 834     /* the last chapter started at this frame (init to 0 so
 835      * we skip useless chapters near the beginning as well) */
 836     int64_t i_prev_chapter = 0;
 837
 838     /* parse lines of the form "0:00:00.00 foobar" */
 839     char *line = NULL;
 840     size_t line_len;
 841     while( ReadLine( &line, &line_len, marksfile ) )
 842     {
 843         int64_t i_frame = ParseFrameNumber( line, p_sys->fps );
 844
 845         /* skip chapters which are near the end or too close to each other */
 846         if( i_frame - i_prev_chapter < i_min_chapter_size ||
 847             i_frame >= i_frame_count - i_min_chapter_size )
 848             continue;
 849         i_prev_chapter = i_frame;
 850
 851         /* move chapters (simple workaround for inaccurate cut marks) */
 852         if( i_frame > -i_chapter_offset )
 853             i_frame += i_chapter_offset;
 854         else
 855             i_frame = 0;
 856
 857         uint64_t i_offset;
 858         uint16_t i_file_number;
 859         if( !ReadIndexRecord( indexfile, p_sys->b_ts_format,
 860             i_frame, &i_offset, &i_file_number ) )
 861             continue;
 862         if( i_file_number < 1 || i_file_number > FILE_COUNT )
 863             continue;
 864
 865         /* add file sizes to get the "global" offset */
 866         seekpoint_t *sp = vlc_seekpoint_New();
 867         if( !sp )
 868             continue;
 869         sp->i_time_offset = i_frame * (int64_t)( CLOCK_FREQ / p_sys->fps );
 870         sp->psz_name = strdup( line );
 871
 872         TAB_APPEND( p_marks->i_seekpoint, p_marks->seekpoint, sp );
 873         TAB_APPEND( offsetc, offsetv, i_offset );
 874
 875         for( int i = 0; i + 1 < i_file_number; ++i )
 876             offsetv[offsetc - 1] += FILE_SIZE( i );
 877     }
 878
 879     /* add a chapter at the beginning if missing */
 880     if( p_marks->i_seekpoint > 0 && offsetv[0] > 0 )
 881     {
 882         seekpoint_t *sp = vlc_seekpoint_New();
 883         if( sp )
 884         {
 885             sp->i_time_offset = 0;
 886             sp->psz_name = strdup( _("Start") );
 887             TAB_INSERT( p_marks->i_seekpoint, p_marks->seekpoint, sp, 0 );
 888             TAB_INSERT( offsetc, offsetv, UINT64_C(0), 0 );
 889         }
 890     }
 891
 892     if( p_marks->i_seekpoint > 0 )
 893     {
 894         p_sys->p_marks = p_marks;
 895         p_sys->offsets = offsetv;
 896     }
 897     else
 898     {
 899         vlc_input_title_Delete( p_marks );
 900         TAB_CLEAN( offsetc, offsetv );
 901     }
 902
 903     fclose( marksfile );
 904     fclose( indexfile );
 905 }
 906
 907 /*****************************************************************************
 908  * Lookup frame offset in index file
 909  *****************************************************************************/
 910 static bool ReadIndexRecord( FILE *p_file, bool b_ts, int64_t i_frame,
 911                             uint64_t *pi_offset, uint16_t *pi_file_num )
 912 {
 913     uint8_t index_record[8];
 914     if( fseek( p_file, sizeof(index_record) * i_frame, SEEK_SET ) != 0 )
 915         return false;
 916     if( fread( &index_record, sizeof(index_record), 1, p_file ) < 1 )
 917         return false;
 918
 919     /* VDR usually (only?) runs on little endian machines, but VLC has a
 920      * broader audience. See recording.* in VDR source for data layout. */
 921     if( b_ts )
 922     {
 923         uint64_t i_index_entry = GetQWLE( &index_record );
 924         *pi_offset = i_index_entry & UINT64_C(0xFFFFFFFFFF);
 925         *pi_file_num = i_index_entry >> 48;
 926     }
 927     else
 928     {
 929         *pi_offset = GetDWLE( &index_record );
 930         *pi_file_num = index_record[5];
 931     }
 932
 933     return true;
 934 }
 935
 936 /*****************************************************************************
 937  * Convert time stamp from file to frame number
 938  *****************************************************************************/
 939 static int64_t ParseFrameNumber( const char *psz_line, float fps )
 940 {
 941     unsigned h, m, s, f, n;
 942
 943     /* hour:min:sec.frame (frame is optional) */
 944     n = sscanf( psz_line, "%u:%u:%u.%u", &h, &m, &s, &f );
 945     if( n >= 3 )
 946     {
 947         if( n < 4 )
 948             f = 1;
 949         int64_t i_seconds = (int64_t)h * 3600 + (int64_t)m * 60 + s;
 950         return (int64_t)( i_seconds * (double)fps ) + __MAX(1, f) - 1;
 951     }
 952
 953     /* only a frame number */
 954     int64_t i_frame = strtoll( psz_line, NULL, 10 );
 955     return __MAX(1, i_frame) - 1;
 956 }
 957
 958 /*****************************************************************************
 959  * Return the last path component (including trailing separators)
 960  *****************************************************************************/
 961 static const char *BaseName( const char *psz_path )
 962 {
 963     const char *psz_name = psz_path + strlen( psz_path );
 964
 965     /* skip superfluous separators at the end */
 966     while( psz_name > psz_path && psz_name[-1] == DIR_SEP_CHAR )
 967         --psz_name;
 968
 969     /* skip last component */
 970     while( psz_name > psz_path && psz_name[-1] != DIR_SEP_CHAR )
 971         --psz_name;
 972
 973     return psz_name;
 974 }