1 /*****************************************************************************
2 * vcd.c : VCD input module for vlc
3 *****************************************************************************
4 * Copyright (C) 2000-2004 the VideoLAN team
7 * Author: Johan Bilien <jobi@via.ecp.fr>
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
22 *****************************************************************************/
24 /*****************************************************************************
26 *****************************************************************************/
33 #include <vlc_input.h>
34 #include <vlc_access.h>
35 #include <vlc_charset.h>
39 /*****************************************************************************
41 *****************************************************************************/
42 static int Open ( vlc_object_t * );
43 static void Close( vlc_object_t * );
45 #define CACHING_TEXT N_("Caching value in ms")
46 #define CACHING_LONGTEXT N_( \
47 "Caching value for VCDs. This " \
48 "value should be set in milliseconds." )
51 set_shortname( _("VCD"));
52 set_description( _("VCD input") );
53 set_capability( "access", 60 );
54 set_callbacks( Open, Close );
55 set_category( CAT_INPUT );
56 set_subcategory( SUBCAT_INPUT_ACCESS );
58 add_usage_hint( N_("[vcd:][device][@[title][,[chapter]]]") );
59 add_integer( "vcd-caching", DEFAULT_PTS_DELAY / 1000, NULL, CACHING_TEXT,
60 CACHING_LONGTEXT, true );
61 add_shortcut( "vcd" );
62 add_shortcut( "svcd" );
65 /*****************************************************************************
67 *****************************************************************************/
69 /* how many blocks VCDRead will read in each loop */
70 #define VCD_BLOCKS_ONCE 20
71 #define VCD_DATA_ONCE (VCD_BLOCKS_ONCE * VCD_DATA_SIZE)
75 vcddev_t *vcddev; /* vcd device descriptor */
79 input_title_t *title[99]; /* No more that 99 track in a vcd ? */
82 int i_sector; /* Current Sector */
83 int *p_sectors; /* Track sectors */
86 static block_t *Block( access_t * );
87 static int Seek( access_t *, int64_t );
88 static int Control( access_t *, int, va_list );
89 static int EntryPoints( access_t * );
91 /*****************************************************************************
93 *****************************************************************************/
94 static int Open( vlc_object_t *p_this )
96 access_t *p_access = (access_t *)p_this;
98 char *psz_dup = ToLocaleDup( p_access->psz_path );
105 /* Command line: vcd://[dev_path][@title[,chapter]] */
106 if( ( psz = strchr( psz_dup, '@' ) ) )
110 i_title = strtol( psz, &psz, 0 );
112 i_chapter = strtol( psz+1, &psz, 0 );
115 if( *psz_dup == '\0' )
119 /* Only when selected */
120 if( strcmp( p_access->psz_access, "vcd" ) &&
121 strcmp( p_access->psz_access, "svcd" ) )
124 psz_dup = var_CreateGetString( p_access, "vcd" );
125 if( *psz_dup == '\0' )
133 if( psz_dup[0] && psz_dup[1] == ':' &&
134 psz_dup[2] == '\\' && psz_dup[3] == '\0' ) psz_dup[2] = '\0';
138 if( !(vcddev = ioctl_Open( p_this, psz_dup )) )
145 /* Set up p_access */
146 p_access->pf_read = NULL;
147 p_access->pf_block = Block;
148 p_access->pf_control = Control;
149 p_access->pf_seek = Seek;
150 p_access->info.i_update = 0;
151 p_access->info.i_size = 0;
152 p_access->info.i_pos = 0;
153 p_access->info.b_eof = false;
154 p_access->info.i_title = 0;
155 p_access->info.i_seekpoint = 0;
156 p_access->p_sys = p_sys = malloc( sizeof( access_sys_t ) );
157 memset( p_sys, 0, sizeof( access_sys_t ) );
158 p_sys->vcddev = vcddev;
160 /* We read the Table Of Content information */
161 p_sys->i_titles = ioctl_GetTracksMap( VLC_OBJECT(p_access),
162 p_sys->vcddev, &p_sys->p_sectors );
163 if( p_sys->i_titles < 0 )
165 msg_Err( p_access, "unable to count tracks" );
168 else if( p_sys->i_titles <= 1 )
170 msg_Err( p_access, "no movie tracks found" );
173 /* The first title isn't usable */
176 /* Build title table */
177 for( i = 0; i < p_sys->i_titles; i++ )
179 input_title_t *t = p_sys->title[i] = vlc_input_title_New();
181 msg_Dbg( p_access, "title[%d] start=%d\n", i, p_sys->p_sectors[1+i] );
182 msg_Dbg( p_access, "title[%d] end=%d\n", i, p_sys->p_sectors[i+2] );
184 t->i_size = ( p_sys->p_sectors[i+2] - p_sys->p_sectors[i+1] ) *
185 (int64_t)VCD_DATA_SIZE;
188 /* Map entry points into chapters */
189 if( EntryPoints( p_access ) )
191 msg_Warn( p_access, "could not read entry points, will not use them" );
194 /* Starting title/chapter and sector */
195 if( i_title >= p_sys->i_titles )
197 if( i_chapter >= p_sys->title[i_title]->i_seekpoint )
200 p_sys->i_sector = p_sys->p_sectors[1+i_title];
204 ( p_sys->title[i_title]->seekpoint[i_chapter]->i_byte_offset /
207 p_access->info.i_title = i_title;
208 p_access->info.i_seekpoint = i_chapter;
209 p_access->info.i_size = p_sys->title[i_title]->i_size;
210 p_access->info.i_pos = ( p_sys->i_sector - p_sys->p_sectors[1+i_title] ) *
213 p_access->psz_demux = strdup( "ps" );
218 ioctl_Close( VLC_OBJECT(p_access), p_sys->vcddev );
223 /*****************************************************************************
225 *****************************************************************************/
226 static void Close( vlc_object_t *p_this )
228 access_t *p_access = (access_t *)p_this;
229 access_sys_t *p_sys = p_access->p_sys;
231 ioctl_Close( p_this, p_sys->vcddev );
235 /*****************************************************************************
237 *****************************************************************************/
238 static int Control( access_t *p_access, int i_query, va_list args )
240 access_sys_t *p_sys = p_access->p_sys;
244 input_title_t ***ppp_title;
250 case ACCESS_CAN_SEEK:
251 case ACCESS_CAN_FASTSEEK:
252 case ACCESS_CAN_PAUSE:
253 case ACCESS_CAN_CONTROL_PACE:
254 pb_bool = (bool*)va_arg( args, bool* );
260 pi_int = (int*)va_arg( args, int * );
261 *pi_int = VCD_DATA_ONCE;
264 case ACCESS_GET_PTS_DELAY:
265 pi_64 = (int64_t*)va_arg( args, int64_t * );
266 *pi_64 = var_GetInteger( p_access, "vcd-caching" ) * 1000;
270 case ACCESS_SET_PAUSE_STATE:
273 case ACCESS_GET_TITLE_INFO:
274 ppp_title = (input_title_t***)va_arg( args, input_title_t*** );
275 pi_int = (int*)va_arg( args, int* );
277 /* Duplicate title infos */
278 *pi_int = p_sys->i_titles;
279 *ppp_title = malloc( sizeof(input_title_t **) * p_sys->i_titles );
280 for( i = 0; i < p_sys->i_titles; i++ )
282 (*ppp_title)[i] = vlc_input_title_Duplicate( p_sys->title[i] );
286 case ACCESS_SET_TITLE:
287 i = (int)va_arg( args, int );
288 if( i != p_access->info.i_title )
291 p_access->info.i_update |=
292 INPUT_UPDATE_TITLE|INPUT_UPDATE_SEEKPOINT|INPUT_UPDATE_SIZE;
293 p_access->info.i_title = i;
294 p_access->info.i_seekpoint = 0;
295 p_access->info.i_size = p_sys->title[i]->i_size;
296 p_access->info.i_pos = 0;
298 /* Next sector to read */
299 p_sys->i_sector = p_sys->p_sectors[1+i];
303 case ACCESS_SET_SEEKPOINT:
305 input_title_t *t = p_sys->title[p_access->info.i_title];
306 i = (int)va_arg( args, int );
307 if( t->i_seekpoint > 0 )
309 p_access->info.i_update |= INPUT_UPDATE_SEEKPOINT;
310 p_access->info.i_seekpoint = i;
312 p_sys->i_sector = p_sys->p_sectors[1+p_access->info.i_title] +
313 t->seekpoint[i]->i_byte_offset / VCD_DATA_SIZE;
315 p_access->info.i_pos = (int64_t)(p_sys->i_sector -
316 p_sys->p_sectors[1+p_access->info.i_title]) *VCD_DATA_SIZE;
321 case ACCESS_SET_PRIVATE_ID_STATE:
322 case ACCESS_GET_CONTENT_TYPE:
326 msg_Warn( p_access, "unimplemented query in control" );
333 /*****************************************************************************
335 *****************************************************************************/
336 static block_t *Block( access_t *p_access )
338 access_sys_t *p_sys = p_access->p_sys;
339 int i_blocks = VCD_BLOCKS_ONCE;
343 /* Check end of file */
344 if( p_access->info.b_eof ) return NULL;
346 /* Check end of title */
347 while( p_sys->i_sector >= p_sys->p_sectors[p_access->info.i_title + 2] )
349 if( p_access->info.i_title + 2 >= p_sys->i_titles )
351 p_access->info.b_eof = true;
355 p_access->info.i_update |=
356 INPUT_UPDATE_TITLE | INPUT_UPDATE_SEEKPOINT | INPUT_UPDATE_SIZE;
357 p_access->info.i_title++;
358 p_access->info.i_seekpoint = 0;
359 p_access->info.i_size =
360 p_sys->title[p_access->info.i_title]->i_size;
361 p_access->info.i_pos = 0;
364 /* Don't read after the end of a title */
365 if( p_sys->i_sector + i_blocks >=
366 p_sys->p_sectors[p_access->info.i_title + 2] )
368 i_blocks = p_sys->p_sectors[p_access->info.i_title + 2 ] -
372 /* Do the actual reading */
373 if( !( p_block = block_New( p_access, i_blocks * VCD_DATA_SIZE ) ) )
375 msg_Err( p_access, "cannot get a new block of size: %i",
376 i_blocks * VCD_DATA_SIZE );
380 if( ioctl_ReadSectors( VLC_OBJECT(p_access), p_sys->vcddev,
381 p_sys->i_sector, p_block->p_buffer, i_blocks, VCD_TYPE ) < 0 )
383 msg_Err( p_access, "cannot read sector %i", p_sys->i_sector );
384 block_Release( p_block );
386 /* Try to skip one sector (in case of bad sectors) */
388 p_access->info.i_pos += VCD_DATA_SIZE;
392 /* Update seekpoints */
393 for( i_read = 0; i_read < i_blocks; i_read++ )
395 input_title_t *t = p_sys->title[p_access->info.i_title];
397 if( t->i_seekpoint > 0 &&
398 p_access->info.i_seekpoint + 1 < t->i_seekpoint &&
399 p_access->info.i_pos + i_read * VCD_DATA_SIZE >=
400 t->seekpoint[p_access->info.i_seekpoint+1]->i_byte_offset )
402 msg_Dbg( p_access, "seekpoint change" );
403 p_access->info.i_update |= INPUT_UPDATE_SEEKPOINT;
404 p_access->info.i_seekpoint++;
408 /* Update a few values */
409 p_sys->i_sector += i_blocks;
410 p_access->info.i_pos += p_block->i_buffer;
415 /*****************************************************************************
417 *****************************************************************************/
418 static int Seek( access_t *p_access, int64_t i_pos )
420 access_sys_t *p_sys = p_access->p_sys;
421 input_title_t *t = p_sys->title[p_access->info.i_title];
424 /* Next sector to read */
425 p_access->info.i_pos = i_pos;
426 p_sys->i_sector = i_pos / VCD_DATA_SIZE +
427 p_sys->p_sectors[p_access->info.i_title + 1];
429 /* Update current seekpoint */
430 for( i_seekpoint = 0; i_seekpoint < t->i_seekpoint; i_seekpoint++ )
432 if( i_seekpoint + 1 >= t->i_seekpoint ) break;
433 if( i_pos < t->seekpoint[i_seekpoint + 1]->i_byte_offset ) break;
436 if( i_seekpoint != p_access->info.i_seekpoint )
438 msg_Dbg( p_access, "seekpoint change" );
439 p_access->info.i_update |= INPUT_UPDATE_SEEKPOINT;
440 p_access->info.i_seekpoint = i_seekpoint;
444 p_access->info.b_eof = false;
449 /*****************************************************************************
450 * EntryPoints: Reads the information about the entry points on the disc.
451 *****************************************************************************/
452 static int EntryPoints( access_t *p_access )
454 access_sys_t *p_sys = p_access->p_sys;
455 uint8_t sector[VCD_DATA_SIZE];
457 entries_sect_t entries;
460 /* Read the entry point sector */
461 if( ioctl_ReadSectors( VLC_OBJECT(p_access), p_sys->vcddev,
462 VCD_ENTRIES_SECTOR, sector, 1, VCD_TYPE ) < 0 )
464 msg_Err( p_access, "could not read entry points sector" );
467 memcpy( &entries, sector, CD_SECTOR_SIZE );
469 i_nb = GetWBE( &entries.i_entries_nb );
472 msg_Err( p_access, "invalid entry points number" );
476 if( strncmp( entries.psz_id, "ENTRYVCD", sizeof( entries.psz_id ) ) &&
477 strncmp( entries.psz_id, "ENTRYSVD", sizeof( entries.psz_id ) ) )
479 msg_Err( p_access, "unrecognized entry points format" );
483 for( i = 0; i < i_nb; i++ )
485 const int i_title = BCD_TO_BIN(entries.entry[i].i_track) - 2;
487 (MSF_TO_LBA2( BCD_TO_BIN( entries.entry[i].msf.minute ),
488 BCD_TO_BIN( entries.entry[i].msf.second ),
489 BCD_TO_BIN( entries.entry[i].msf.frame ) ));
492 if( i_title < 0 ) continue; /* Should not occur */
493 if( i_title >= p_sys->i_titles ) continue;
495 msg_Dbg( p_access, "Entry[%d] title=%d sector=%d\n",
496 i, i_title, i_sector );
498 s = vlc_seekpoint_New();
499 s->i_byte_offset = (i_sector - p_sys->p_sectors[i_title+1]) *
502 TAB_APPEND( p_sys->title[i_title]->i_seekpoint,
503 p_sys->title[i_title]->seekpoint, s );