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 typedef struct
 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 } access_sys_t;
 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( stream_t *, int, va_list );
 138 static ssize_t Read( stream_t *p_access, void *p_buffer, size_t i_len );
 139 static int Seek( stream_t *p_access, uint64_t i_pos);
 140 static void FindSeekpoint( stream_t *p_access );
 141 static bool ScanDirectory( stream_t *p_access );
 142 static char *GetFilePath( stream_t *p_access, unsigned i_file );
 143 static bool ImportNextFile( stream_t *p_access );
 144 static bool SwitchFile( stream_t *p_access, unsigned i_file );
 145 static void OptimizeForRead( int fd );
 146 static void UpdateFileSize( stream_t *p_access );
 147 static FILE *OpenRelativeFile( stream_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( stream_t *p_access );
 150 static void ImportMarks( stream_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     stream_t *p_access = (stream_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_obj_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     stream_t *p_access = (stream_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     free( p_sys->offsets );
 230     vlc_input_title_Delete( p_sys->p_marks );
 231 }
 232
 233 /*****************************************************************************
 234  * Determine format and import files
 235  *****************************************************************************/
 236 static bool ScanDirectory( stream_t *p_access )
 237 {
 238     access_sys_t *p_sys = p_access->p_sys;
 239
 240     /* find first part and determine directory format */
 241     p_sys->b_ts_format = true;
 242     if( !ImportNextFile( p_access ) )
 243     {
 244         p_sys->b_ts_format = !p_sys->b_ts_format;
 245         if( !ImportNextFile( p_access ) )
 246             return false;
 247     }
 248
 249     /* get all remaining parts */
 250     while( ImportNextFile( p_access ) )
 251         continue;
 252
 253     /* import meta data etc. */
 254     ImportMeta( p_access );
 255
 256     /* cut marks depend on meta data and file sizes */
 257     ImportMarks( p_access );
 258
 259     return true;
 260 }
 261
 262 /*****************************************************************************
 263  * Control input stream
 264  *****************************************************************************/
 265 static int Control( stream_t *p_access, int i_query, va_list args )
 266 {
 267     access_sys_t *p_sys = p_access->p_sys;
 268     input_title_t ***ppp_title;
 269     int i;
 270     vlc_meta_t *p_meta;
 271
 272     switch( i_query )
 273     {
 274         case STREAM_CAN_SEEK:
 275         case STREAM_CAN_FASTSEEK:
 276         case STREAM_CAN_PAUSE:
 277         case STREAM_CAN_CONTROL_PACE:
 278             *va_arg( args, bool* ) = true;
 279             break;
 280
 281         case STREAM_GET_SIZE:
 282             *va_arg( args, uint64_t* ) = p_sys->size;
 283             break;
 284
 285         case STREAM_GET_PTS_DELAY:
 286             *va_arg( args, vlc_tick_t * ) =
 287                 VLC_TICK_FROM_MS(var_InheritInteger( p_access, "file-caching" ));
 288             break;
 289
 290         case STREAM_SET_PAUSE_STATE:
 291             /* nothing to do */
 292             break;
 293
 294         case STREAM_GET_TITLE_INFO:
 295             /* return a copy of our seek points */
 296             if( !p_sys->p_marks )
 297                 return VLC_EGENERIC;
 298             ppp_title = va_arg( args, input_title_t*** );
 299             *va_arg( args, int* ) = 1;
 300             *ppp_title = malloc( sizeof( **ppp_title ) );
 301             if( !*ppp_title )
 302                 return VLC_ENOMEM;
 303             **ppp_title = vlc_input_title_Duplicate( p_sys->p_marks );
 304             break;
 305
 306         case STREAM_GET_TITLE:
 307             *va_arg( args, unsigned * ) = 0;
 308             break;
 309
 310         case STREAM_GET_SEEKPOINT:
 311             *va_arg( args, unsigned * ) = p_sys->cur_seekpoint;
 312             break;
 313
 314         case STREAM_GET_CONTENT_TYPE:
 315             *va_arg( args, char ** ) =
 316                 strdup( p_sys->b_ts_format ? "video/MP2T" : "video/MP2P" );
 317             break;
 318
 319         case STREAM_SET_TITLE:
 320             /* ignore - only one title */
 321             break;
 322
 323         case STREAM_SET_SEEKPOINT:
 324             i = va_arg( args, int );
 325             return Seek( p_access, p_sys->offsets[i] );
 326
 327         case STREAM_GET_META:
 328             p_meta = va_arg( args, vlc_meta_t* );
 329             vlc_meta_Merge( p_meta, p_sys->p_meta );
 330             break;
 331
 332         default:
 333             return VLC_EGENERIC;
 334     }
 335     return VLC_SUCCESS;
 336 }
 337
 338 /*****************************************************************************
 339  * Read and concatenate files
 340  *****************************************************************************/
 341 static ssize_t Read( stream_t *p_access, void *p_buffer, size_t i_len )
 342 {
 343     access_sys_t *p_sys = p_access->p_sys;
 344
 345     if( p_sys->fd == -1 )
 346         /* no more data */
 347         return 0;
 348
 349     ssize_t i_ret = read( p_sys->fd, p_buffer, i_len );
 350
 351     if( i_ret > 0 )
 352     {
 353         /* success */
 354         p_sys->offset += i_ret;
 355         UpdateFileSize( p_access );
 356         FindSeekpoint( p_access );
 357         return i_ret;
 358     }
 359     else if( i_ret == 0 )
 360     {
 361         /* check for new files in case the recording is still active */
 362         if( p_sys->i_current_file >= FILE_COUNT - 1 )
 363             ImportNextFile( p_access );
 364         /* play next file */
 365         SwitchFile( p_access, p_sys->i_current_file + 1 );
 366         return -1;
 367     }
 368     else if( errno == EINTR )
 369     {
 370         /* try again later */
 371         return -1;
 372     }
 373     else
 374     {
 375         /* abort on read error */
 376         msg_Err( p_access, "failed to read (%s)", vlc_strerror_c(errno) );
 377         vlc_dialog_display_error( p_access, _("File reading failed"),
 378             _("VLC could not read the file (%s)."),
 379             vlc_strerror(errno) );
 380         SwitchFile( p_access, -1 );
 381         return 0;
 382     }
 383 }
 384
 385 /*****************************************************************************
 386  * Seek to a specific location in a file
 387  *****************************************************************************/
 388 static int Seek( stream_t *p_access, uint64_t i_pos )
 389 {
 390     access_sys_t *p_sys = p_access->p_sys;
 391
 392     /* might happen if called by STREAM_SET_SEEKPOINT */
 393     i_pos = __MIN( i_pos, p_sys->size );
 394
 395     p_sys->offset = i_pos;
 396
 397     /* find correct chapter */
 398     FindSeekpoint( p_access );
 399
 400     /* find correct file */
 401     unsigned i_file = 0;
 402     while( i_file < FILE_COUNT - 1 &&
 403            i_pos >= FILE_SIZE( i_file ) )
 404     {
 405         i_pos -= FILE_SIZE( i_file );
 406         i_file++;
 407     }
 408     if( !SwitchFile( p_access, i_file ) )
 409         return VLC_EGENERIC;
 410
 411     /* adjust position within that file */
 412     return lseek( p_sys->fd, i_pos, SEEK_SET ) != -1 ?
 413         VLC_SUCCESS : VLC_EGENERIC;
 414 }
 415
 416 /*****************************************************************************
 417  * Change the chapter index to match the current position
 418  *****************************************************************************/
 419 static void FindSeekpoint( stream_t *p_access )
 420 {
 421     access_sys_t *p_sys = p_access->p_sys;
 422     if( !p_sys->p_marks )
 423         return;
 424
 425     int new_seekpoint = p_sys->cur_seekpoint;
 426     if( p_sys->offset < p_sys->offsets[p_sys->cur_seekpoint] )
 427     {
 428         /* i_pos moved backwards, start fresh */
 429         new_seekpoint = 0;
 430     }
 431
 432     /* only need to check the following seekpoints */
 433     while( new_seekpoint + 1 < p_sys->p_marks->i_seekpoint &&
 434         p_sys->offset >= p_sys->offsets[new_seekpoint + 1] )
 435     {
 436         new_seekpoint++;
 437     }
 438
 439     p_sys->cur_seekpoint = new_seekpoint;
 440 }
 441
 442 /*****************************************************************************
 443  * Returns the path of a certain part
 444  *****************************************************************************/
 445 static char *GetFilePath( stream_t *p_access, unsigned i_file )
 446 {
 447     access_sys_t *sys = p_access->p_sys;
 448     char *psz_path;
 449
 450     if( asprintf( &psz_path, sys->b_ts_format ?
 451         "%s" DIR_SEP "%05u.ts" : "%s" DIR_SEP "%03u.vdr",
 452         p_access->psz_filepath, i_file + 1 ) == -1 )
 453         return NULL;
 454     else
 455         return psz_path;
 456 }
 457
 458 /*****************************************************************************
 459  * Check if another part exists and import it
 460  *****************************************************************************/
 461 static bool ImportNextFile( stream_t *p_access )
 462 {
 463     access_sys_t *p_sys = p_access->p_sys;
 464
 465     char *psz_path = GetFilePath( p_access, FILE_COUNT );
 466     if( !psz_path )
 467         return false;
 468
 469     struct stat st;
 470     if( vlc_stat( psz_path, &st ) )
 471     {
 472         msg_Dbg( p_access, "could not stat %s: %s", psz_path,
 473                  vlc_strerror_c(errno) );
 474         free( psz_path );
 475         return false;
 476     }
 477     if( !S_ISREG( st.st_mode ) )
 478     {
 479         msg_Dbg( p_access, "%s is not a regular file", psz_path );
 480         free( psz_path );
 481         return false;
 482     }
 483     msg_Dbg( p_access, "%s exists", psz_path );
 484     free( psz_path );
 485
 486     ARRAY_APPEND( p_sys->file_sizes, st.st_size );
 487     p_sys->size += st.st_size;
 488
 489     return true;
 490 }
 491
 492 /*****************************************************************************
 493  * Close the current file and open another
 494  *****************************************************************************/
 495 static bool SwitchFile( stream_t *p_access, unsigned i_file )
 496 {
 497     access_sys_t *p_sys = p_access->p_sys;
 498
 499     /* requested file already open? */
 500     if( p_sys->fd != -1 && p_sys->i_current_file == i_file )
 501         return true;
 502
 503     /* close old file */
 504     if( p_sys->fd != -1 )
 505     {
 506         vlc_close( p_sys->fd );
 507         p_sys->fd = -1;
 508     }
 509
 510     /* switch */
 511     if( i_file >= FILE_COUNT )
 512         return false;
 513     p_sys->i_current_file = i_file;
 514
 515     /* open new file */
 516     char *psz_path = GetFilePath( p_access, i_file );
 517     if( !psz_path )
 518         return false;
 519     p_sys->fd = vlc_open( psz_path, O_RDONLY );
 520
 521     if( p_sys->fd == -1 )
 522     {
 523         msg_Err( p_access, "Failed to open %s: %s", psz_path,
 524                  vlc_strerror_c(errno) );
 525         goto error;
 526     }
 527
 528     /* cannot handle anything except normal files */
 529     struct stat st;
 530     if( fstat( p_sys->fd, &st ) || !S_ISREG( st.st_mode ) )
 531     {
 532         msg_Err( p_access, "%s is not a regular file", psz_path );
 533         goto error;
 534     }
 535
 536     OptimizeForRead( p_sys->fd );
 537
 538     msg_Dbg( p_access, "opened %s", psz_path );
 539     free( psz_path );
 540     return true;
 541
 542 error:
 543     vlc_dialog_display_error (p_access, _("File reading failed"), _("VLC could not"
 544         " open the file \"%s\" (%s)."), psz_path, vlc_strerror(errno) );
 545     if( p_sys->fd != -1 )
 546     {
 547         vlc_close( p_sys->fd );
 548         p_sys->fd = -1;
 549     }
 550     free( psz_path );
 551     return false;
 552 }
 553
 554 /*****************************************************************************
 555  * Some tweaks to speed up read()
 556  *****************************************************************************/
 557 static void OptimizeForRead( int fd )
 558 {
 559     /* cf. Open() in file access module */
 560     VLC_UNUSED(fd);
 561 #ifdef HAVE_POSIX_FADVISE
 562     posix_fadvise( fd, 0, 4096, POSIX_FADV_WILLNEED );
 563     posix_fadvise( fd, 0, 0, POSIX_FADV_NOREUSE );
 564 #endif
 565 #ifdef F_RDAHEAD
 566     fcntl( fd, F_RDAHEAD, 1 );
 567 #endif
 568 #ifdef F_NOCACHE
 569     fcntl( fd, F_NOCACHE, 0 );
 570 #endif
 571 }
 572
 573 /*****************************************************************************
 574  * Fix size if the (last) part is still growing
 575  *****************************************************************************/
 576 static void UpdateFileSize( stream_t *p_access )
 577 {
 578     access_sys_t *p_sys = p_access->p_sys;
 579     struct stat st;
 580
 581     if( p_sys->size >= p_sys->offset )
 582         return;
 583
 584     /* TODO: not sure if this can happen or what to do in this case */
 585     if( fstat( p_sys->fd, &st ) )
 586         return;
 587     if( (uint64_t)st.st_size <= CURRENT_FILE_SIZE )
 588         return;
 589
 590     p_sys->size -= CURRENT_FILE_SIZE;
 591     CURRENT_FILE_SIZE = st.st_size;
 592     p_sys->size += CURRENT_FILE_SIZE;
 593 }
 594
 595 /*****************************************************************************
 596  * Open file relative to base directory for reading.
 597  *****************************************************************************/
 598 static FILE *OpenRelativeFile( stream_t *p_access, const char *psz_file )
 599 {
 600     access_sys_t *sys = p_access->p_sys;
 601
 602     /* build path and add extension */
 603     char *psz_path;
 604     if( asprintf( &psz_path, "%s" DIR_SEP "%s%s", p_access->psz_filepath,
 605                   psz_file, sys->b_ts_format ? "" : ".vdr" ) == -1 )
 606         return NULL;
 607
 608     FILE *file = vlc_fopen( psz_path, "rb" );
 609     if( !file )
 610         msg_Warn( p_access, "Failed to open %s: %s", psz_path,
 611                   vlc_strerror_c(errno) );
 612     free( psz_path );
 613
 614     return file;
 615 }
 616
 617 /*****************************************************************************
 618  * Read a line of text. Returns false on error or EOF.
 619  *****************************************************************************/
 620 static bool ReadLine( char **ppsz_line, size_t *pi_size, FILE *p_file )
 621 {
 622     ssize_t read = getline( ppsz_line, pi_size, p_file );
 623
 624     if( read == -1 )
 625     {
 626         /* automatically free buffer on eof */
 627         free( *ppsz_line );
 628         *ppsz_line = NULL;
 629         return false;
 630     }
 631
 632     if( read > 0 && (*ppsz_line)[ read - 1 ] == '\n' )
 633         (*ppsz_line)[ read - 1 ] = '\0';
 634     EnsureUTF8( *ppsz_line );
 635
 636     return true;
 637 }
 638
 639 /*****************************************************************************
 640  * Import meta data
 641  *****************************************************************************/
 642 static void ImportMeta( stream_t *p_access )
 643 {
 644     access_sys_t *p_sys = p_access->p_sys;
 645
 646     FILE *infofile = OpenRelativeFile( p_access, "info" );
 647     if( !infofile )
 648         return;
 649
 650     vlc_meta_t *p_meta = vlc_meta_New();
 651     p_sys->p_meta = p_meta;
 652     if( !p_meta )
 653     {
 654         fclose( infofile );
 655         return;
 656     }
 657
 658     char *line = NULL;
 659     size_t line_len;
 660     char *psz_title = NULL, *psz_smalltext = NULL, *psz_date = NULL;
 661
 662     while( ReadLine( &line, &line_len, infofile ) )
 663     {
 664         if( !isalpha( (unsigned char)line[0] ) || line[1] != ' ' )
 665             continue;
 666
 667         char tag = line[0];
 668         char *text = line + 2;
 669
 670         if( tag == 'C' )
 671         {
 672             char *psz_name = strchr( text, ' ' );
 673             if( psz_name )
 674             {
 675                 *psz_name = '\0';
 676                 vlc_meta_AddExtra( p_meta, "Channel", psz_name + 1 );
 677             }
 678             vlc_meta_AddExtra( p_meta, "Transponder", text );
 679         }
 680
 681         else if( tag == 'E' )
 682         {
 683             unsigned i_id, i_start, i_length;
 684             if( sscanf( text, "%u %u %u", &i_id, &i_start, &i_length ) == 3 )
 685             {
 686                 char str[50];
 687                 struct tm tm;
 688                 time_t start = i_start;
 689                 localtime_r( &start, &tm );
 690
 691                 /* TODO: locale */
 692                 strftime( str, sizeof(str), "%Y-%m-%d %H:%M", &tm );
 693                 vlc_meta_AddExtra( p_meta, "Date", str );
 694                 free( psz_date );
 695                 psz_date = strdup( str );
 696
 697                 /* display in minutes */
 698                 i_length = ( i_length + 59 ) / 60;
 699                 snprintf( str, sizeof(str), "%u:%02u", i_length / 60, i_length % 60 );
 700                 vlc_meta_AddExtra( p_meta, "Duration", str );
 701             }
 702         }
 703
 704         else if( tag == 'T' )
 705         {
 706             free( psz_title );
 707             psz_title = strdup( text );
 708             vlc_meta_AddExtra( p_meta, "Title", text );
 709         }
 710
 711         else if( tag == 'S' )
 712         {
 713             free( psz_smalltext );
 714             psz_smalltext = strdup( text );
 715             vlc_meta_AddExtra( p_meta, "Info", text );
 716         }
 717
 718         else if( tag == 'D' )
 719         {
 720             for( char *p = text; *p; ++p )
 721             {
 722                 if( *p == '|' )
 723                     *p = '\n';
 724             }
 725             vlc_meta_SetDescription( p_meta, text );
 726         }
 727
 728         /* FPS are required to convert between timestamps and frames */
 729         else if( tag == 'F' )
 730         {
 731             float fps = atof( text );
 732             if( fps >= 1 )
 733                 p_sys->fps = fps;
 734             vlc_meta_AddExtra( p_meta, "Frame Rate", text );
 735         }
 736
 737         else if( tag == 'P' )
 738         {
 739             vlc_meta_AddExtra( p_meta, "Priority", text );
 740         }
 741
 742         else if( tag == 'L' )
 743         {
 744             vlc_meta_AddExtra( p_meta, "Lifetime", text );
 745         }
 746     }
 747
 748     /* create a meaningful title */
 749     int i_len = 10 +
 750         ( psz_title ? strlen( psz_title ) : 0 ) +
 751         ( psz_smalltext ? strlen( psz_smalltext ) : 0 ) +
 752         ( psz_date ? strlen( psz_date ) : 0 );
 753     char *psz_display = malloc( i_len );
 754
 755     if( psz_display )
 756     {
 757         *psz_display = '\0';
 758         if( psz_title )
 759             strcat( psz_display, psz_title );
 760         if( psz_title && psz_smalltext )
 761             strcat( psz_display, " - " );
 762         if( psz_smalltext )
 763             strcat( psz_display, psz_smalltext );
 764         if( ( psz_title || psz_smalltext ) && psz_date )
 765         {
 766             strcat( psz_display, " (" );
 767             strcat( psz_display, psz_date );
 768             strcat( psz_display, ")" );
 769         }
 770         if( *psz_display )
 771             vlc_meta_SetTitle( p_meta, psz_display );
 772     }
 773
 774     free( psz_display );
 775     free( psz_title );
 776     free( psz_smalltext );
 777     free( psz_date );
 778
 779     fclose( infofile );
 780 }
 781
 782 /*****************************************************************************
 783  * Import cut marks and convert them to seekpoints (chapters).
 784  *****************************************************************************/
 785 static void ImportMarks( stream_t *p_access )
 786 {
 787     access_sys_t *p_sys = p_access->p_sys;
 788
 789     FILE *marksfile = OpenRelativeFile( p_access, "marks" );
 790     if( !marksfile )
 791         return;
 792
 793     FILE *indexfile = OpenRelativeFile( p_access, "index" );
 794     if( !indexfile )
 795     {
 796         fclose( marksfile );
 797         return;
 798     }
 799
 800     /* get the length of this recording (index stores 8 bytes per frame) */
 801     struct stat st;
 802     if( fstat( fileno( indexfile ), &st ) )
 803     {
 804         fclose( marksfile );
 805         fclose( indexfile );
 806         return;
 807     }
 808     int64_t i_frame_count = st.st_size / 8;
 809
 810     /* Put all cut marks in a "dummy" title */
 811     input_title_t *p_marks = vlc_input_title_New();
 812     if( !p_marks )
 813     {
 814         fclose( marksfile );
 815         fclose( indexfile );
 816         return;
 817     }
 818     p_marks->psz_name = strdup( _("VDR Cut Marks") );
 819     p_marks->i_length = i_frame_count * (vlc_tick_t)( CLOCK_FREQ / p_sys->fps );
 820
 821     uint64_t *offsetv = NULL;
 822
 823     /* offset for chapter positions */
 824     int i_chapter_offset = p_sys->fps / 1000 *
 825         var_InheritInteger( p_access, "vdr-chapter-offset" );
 826
 827     /* minimum chapter size in frames */
 828     int i_min_chapter_size = p_sys->fps * MIN_CHAPTER_SIZE;
 829
 830     /* the last chapter started at this frame (init to 0 so
 831      * we skip useless chapters near the beginning as well) */
 832     int64_t i_prev_chapter = 0;
 833
 834     /* parse lines of the form "0:00:00.00 foobar" */
 835     char *line = NULL;
 836     size_t line_len;
 837     while( ReadLine( &line, &line_len, marksfile ) )
 838     {
 839         int64_t i_frame = ParseFrameNumber( line, p_sys->fps );
 840
 841         /* skip chapters which are near the end or too close to each other */
 842         if( i_frame - i_prev_chapter < i_min_chapter_size ||
 843             i_frame >= i_frame_count - i_min_chapter_size )
 844             continue;
 845         i_prev_chapter = i_frame;
 846
 847         /* move chapters (simple workaround for inaccurate cut marks) */
 848         if( i_frame > -i_chapter_offset )
 849             i_frame += i_chapter_offset;
 850         else
 851             i_frame = 0;
 852
 853         uint64_t i_offset;
 854         uint16_t i_file_number;
 855         if( !ReadIndexRecord( indexfile, p_sys->b_ts_format,
 856             i_frame, &i_offset, &i_file_number ) )
 857             continue;
 858         if( i_file_number < 1 || i_file_number > FILE_COUNT )
 859             continue;
 860
 861         /* add file sizes to get the "global" offset */
 862         seekpoint_t *sp = vlc_seekpoint_New();
 863         if( !sp )
 864             continue;
 865         sp->i_time_offset = i_frame * (vlc_tick_t)( CLOCK_FREQ / p_sys->fps );
 866         sp->psz_name = strdup( line );
 867
 868         TAB_APPEND( p_marks->i_seekpoint, p_marks->seekpoint, sp );
 869         offsetv = xrealloc(offsetv, p_marks->i_seekpoint * sizeof (*offsetv));
 870
 871         for( int i = 0; i + 1 < i_file_number; ++i )
 872             i_offset += FILE_SIZE(i);
 873
 874         offsetv[p_marks->i_seekpoint - 1] = i_offset;
 875     }
 876
 877     /* add a chapter at the beginning if missing */
 878     if( p_marks->i_seekpoint > 0 && offsetv[0] > 0 )
 879     {
 880         seekpoint_t *sp = vlc_seekpoint_New();
 881         if( sp )
 882         {
 883             sp->i_time_offset = 0;
 884             sp->psz_name = strdup( _("Start") );
 885             TAB_INSERT( p_marks->i_seekpoint, p_marks->seekpoint, sp, 0 );
 886             offsetv = xrealloc(offsetv,
 887                                p_marks->i_seekpoint * sizeof (*offsetv));
 888             memmove(offsetv + 1, offsetv,
 889                     (p_marks->i_seekpoint - 1) * sizeof (*offsetv));
 890             offsetv[0] = 0;
 891         }
 892     }
 893
 894     if( p_marks->i_seekpoint > 0 )
 895     {
 896         p_sys->p_marks = p_marks;
 897         p_sys->offsets = offsetv;
 898     }
 899     else
 900     {
 901         vlc_input_title_Delete( p_marks );
 902         free(offsetv);
 903     }
 904
 905     fclose( marksfile );
 906     fclose( indexfile );
 907 }
 908
 909 /*****************************************************************************
 910  * Lookup frame offset in index file
 911  *****************************************************************************/
 912 static bool ReadIndexRecord( FILE *p_file, bool b_ts, int64_t i_frame,
 913                             uint64_t *pi_offset, uint16_t *pi_file_num )
 914 {
 915     uint8_t index_record[8];
 916     if( fseek( p_file, sizeof(index_record) * i_frame, SEEK_SET ) != 0 )
 917         return false;
 918     if( fread( &index_record, sizeof(index_record), 1, p_file ) < 1 )
 919         return false;
 920
 921     /* VDR usually (only?) runs on little endian machines, but VLC has a
 922      * broader audience. See recording.* in VDR source for data layout. */
 923     if( b_ts )
 924     {
 925         uint64_t i_index_entry = GetQWLE( &index_record );
 926         *pi_offset = i_index_entry & UINT64_C(0xFFFFFFFFFF);
 927         *pi_file_num = i_index_entry >> 48;
 928     }
 929     else
 930     {
 931         *pi_offset = GetDWLE( &index_record );
 932         *pi_file_num = index_record[5];
 933     }
 934
 935     return true;
 936 }
 937
 938 /*****************************************************************************
 939  * Convert time stamp from file to frame number
 940  *****************************************************************************/
 941 static int64_t ParseFrameNumber( const char *psz_line, float fps )
 942 {
 943     unsigned h, m, s, f, n;
 944
 945     /* hour:min:sec.frame (frame is optional) */
 946     n = sscanf( psz_line, "%u:%u:%u.%u", &h, &m, &s, &f );
 947     if( n >= 3 )
 948     {
 949         if( n < 4 )
 950             f = 1;
 951         int64_t i_seconds = (int64_t)h * 3600 + (int64_t)m * 60 + s;
 952         return (int64_t)( i_seconds * (double)fps ) + __MAX(1, f) - 1;
 953     }
 954
 955     /* only a frame number */
 956     int64_t i_frame = strtoll( psz_line, NULL, 10 );
 957     return __MAX(1, i_frame) - 1;
 958 }
 959
 960 /*****************************************************************************
 961  * Return the last path component (including trailing separators)
 962  *****************************************************************************/
 963 static const char *BaseName( const char *psz_path )
 964 {
 965     const char *psz_name = psz_path + strlen( psz_path );
 966
 967     /* skip superfluous separators at the end */
 968     while( psz_name > psz_path && psz_name[-1] == DIR_SEP_CHAR )
 969         --psz_name;
 970
 971     /* skip last component */
 972     while( psz_name > psz_path && psz_name[-1] != DIR_SEP_CHAR )
 973         --psz_name;
 974
 975     return psz_name;
 976 }