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 along
20 * with this program; if not, write to the Free Software Foundation, Inc.,
21 * 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
22 *****************************************************************************/
24 /*****************************************************************************
26 *****************************************************************************/
32 #include <vlc_common.h>
33 #include <vlc_plugin.h>
34 #include <vlc_input.h>
35 #include <vlc_access.h>
36 #include <vlc_charset.h>
40 /*****************************************************************************
42 *****************************************************************************/
43 static int Open ( vlc_object_t * );
44 static void Close( vlc_object_t * );
46 #define CACHING_TEXT N_("Caching value in ms")
47 #define CACHING_LONGTEXT N_( \
48 "Caching value for VCDs. This " \
49 "value should be set in milliseconds." )
52 set_shortname( N_("VCD"))
53 set_description( N_("VCD input") )
54 set_capability( "access", 60 )
55 set_callbacks( Open, Close )
56 set_category( CAT_INPUT )
57 set_subcategory( SUBCAT_INPUT_ACCESS )
59 add_usage_hint( N_("[vcd:][device][@[title][,[chapter]]]") )
60 add_integer( "vcd-caching", DEFAULT_PTS_DELAY / 1000, NULL, CACHING_TEXT,
61 CACHING_LONGTEXT, true )
62 add_shortcut( "vcd", "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 *, uint64_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 if( p_access->psz_filepath == NULL )
101 char *psz_dup = ToLocaleDup( p_access->psz_filepath );
108 /* Command line: vcd://[dev_path][@title[,chapter]] */
109 if( ( psz = strchr( psz_dup, '@' ) ) )
113 i_title = strtol( psz, &psz, 0 );
115 i_chapter = strtol( psz+1, &psz, 0 );
118 if( *psz_dup == '\0' )
122 /* Only when selected */
123 if( strcmp( p_access->psz_access, "vcd" ) &&
124 strcmp( p_access->psz_access, "svcd" ) )
127 psz_dup = var_CreateGetString( p_access, "vcd" );
128 if( *psz_dup == '\0' )
136 if( psz_dup[0] && psz_dup[1] == ':' &&
137 psz_dup[2] == '\\' && psz_dup[3] == '\0' ) psz_dup[2] = '\0';
141 vcddev = ioctl_Open( p_this, psz_dup );
146 /* Set up p_access */
147 p_access->pf_read = NULL;
148 p_access->pf_block = Block;
149 p_access->pf_control = Control;
150 p_access->pf_seek = Seek;
151 p_access->info.i_update = 0;
152 p_access->info.i_size = 0;
153 p_access->info.i_pos = 0;
154 p_access->info.b_eof = false;
155 p_access->info.i_title = 0;
156 p_access->info.i_seekpoint = 0;
157 p_access->p_sys = p_sys = calloc( 1, sizeof( access_sys_t ) );
160 p_sys->vcddev = vcddev;
162 /* We read the Table Of Content information */
163 p_sys->i_titles = ioctl_GetTracksMap( VLC_OBJECT(p_access),
164 p_sys->vcddev, &p_sys->p_sectors );
165 if( p_sys->i_titles < 0 )
167 msg_Err( p_access, "unable to count tracks" );
170 else if( p_sys->i_titles <= 1 )
172 msg_Err( p_access, "no movie tracks found" );
175 /* The first title isn't usable */
178 /* Build title table */
179 for( i = 0; i < p_sys->i_titles; i++ )
181 input_title_t *t = p_sys->title[i] = vlc_input_title_New();
183 msg_Dbg( p_access, "title[%d] start=%d", i, p_sys->p_sectors[1+i] );
184 msg_Dbg( p_access, "title[%d] end=%d", i, p_sys->p_sectors[i+2] );
186 t->i_size = ( p_sys->p_sectors[i+2] - p_sys->p_sectors[i+1] ) *
187 (int64_t)VCD_DATA_SIZE;
190 /* Map entry points into chapters */
191 if( EntryPoints( p_access ) )
193 msg_Warn( p_access, "could not read entry points, will not use them" );
196 /* Starting title/chapter and sector */
197 if( i_title >= p_sys->i_titles )
199 if( i_chapter >= p_sys->title[i_title]->i_seekpoint )
202 p_sys->i_sector = p_sys->p_sectors[1+i_title];
206 ( p_sys->title[i_title]->seekpoint[i_chapter]->i_byte_offset /
209 p_access->info.i_title = i_title;
210 p_access->info.i_seekpoint = i_chapter;
211 p_access->info.i_size = p_sys->title[i_title]->i_size;
212 p_access->info.i_pos = ( p_sys->i_sector - p_sys->p_sectors[1+i_title] ) *
215 free( p_access->psz_demux );
216 p_access->psz_demux = strdup( "ps" );
221 ioctl_Close( VLC_OBJECT(p_access), vcddev );
226 /*****************************************************************************
228 *****************************************************************************/
229 static void Close( vlc_object_t *p_this )
231 access_t *p_access = (access_t *)p_this;
232 access_sys_t *p_sys = p_access->p_sys;
234 ioctl_Close( p_this, p_sys->vcddev );
238 /*****************************************************************************
240 *****************************************************************************/
241 static int Control( access_t *p_access, int i_query, va_list args )
243 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 *va_arg( args, bool* ) = true;
258 case ACCESS_GET_PTS_DELAY:
259 *va_arg( args, int64_t * )
260 = var_GetInteger(p_access,"vcd-caching") * 1000;
264 case ACCESS_SET_PAUSE_STATE:
267 case ACCESS_GET_TITLE_INFO:
268 ppp_title = va_arg( args, input_title_t*** );
269 *va_arg( args, int* ) = p_sys->i_titles;
271 /* Duplicate title infos */
272 *ppp_title = malloc( sizeof(input_title_t **) * p_sys->i_titles );
273 for( i = 0; i < p_sys->i_titles; i++ )
275 (*ppp_title)[i] = vlc_input_title_Duplicate( p_sys->title[i] );
279 case ACCESS_SET_TITLE:
280 i = va_arg( args, int );
281 if( i != p_access->info.i_title )
284 p_access->info.i_update |=
285 INPUT_UPDATE_TITLE|INPUT_UPDATE_SEEKPOINT|INPUT_UPDATE_SIZE;
286 p_access->info.i_title = i;
287 p_access->info.i_seekpoint = 0;
288 p_access->info.i_size = p_sys->title[i]->i_size;
289 p_access->info.i_pos = 0;
291 /* Next sector to read */
292 p_sys->i_sector = p_sys->p_sectors[1+i];
296 case ACCESS_SET_SEEKPOINT:
298 input_title_t *t = p_sys->title[p_access->info.i_title];
299 i = va_arg( args, int );
300 if( t->i_seekpoint > 0 )
302 p_access->info.i_update |= INPUT_UPDATE_SEEKPOINT;
303 p_access->info.i_seekpoint = i;
305 p_sys->i_sector = p_sys->p_sectors[1+p_access->info.i_title] +
306 t->seekpoint[i]->i_byte_offset / VCD_DATA_SIZE;
308 p_access->info.i_pos = (uint64_t)(p_sys->i_sector -
309 p_sys->p_sectors[1+p_access->info.i_title]) *VCD_DATA_SIZE;
314 case ACCESS_SET_PRIVATE_ID_STATE:
315 case ACCESS_GET_CONTENT_TYPE:
319 msg_Warn( p_access, "unimplemented query in control" );
326 /*****************************************************************************
328 *****************************************************************************/
329 static block_t *Block( access_t *p_access )
331 access_sys_t *p_sys = p_access->p_sys;
332 int i_blocks = VCD_BLOCKS_ONCE;
336 /* Check end of file */
337 if( p_access->info.b_eof ) return NULL;
339 /* Check end of title */
340 while( p_sys->i_sector >= p_sys->p_sectors[p_access->info.i_title + 2] )
342 if( p_access->info.i_title + 2 >= p_sys->i_titles )
344 p_access->info.b_eof = true;
348 p_access->info.i_update |=
349 INPUT_UPDATE_TITLE | INPUT_UPDATE_SEEKPOINT | INPUT_UPDATE_SIZE;
350 p_access->info.i_title++;
351 p_access->info.i_seekpoint = 0;
352 p_access->info.i_size =
353 p_sys->title[p_access->info.i_title]->i_size;
354 p_access->info.i_pos = 0;
357 /* Don't read after the end of a title */
358 if( p_sys->i_sector + i_blocks >=
359 p_sys->p_sectors[p_access->info.i_title + 2] )
361 i_blocks = p_sys->p_sectors[p_access->info.i_title + 2 ] -
365 /* Do the actual reading */
366 if( !( p_block = block_New( p_access, i_blocks * VCD_DATA_SIZE ) ) )
368 msg_Err( p_access, "cannot get a new block of size: %i",
369 i_blocks * VCD_DATA_SIZE );
373 if( ioctl_ReadSectors( VLC_OBJECT(p_access), p_sys->vcddev,
374 p_sys->i_sector, p_block->p_buffer, i_blocks, VCD_TYPE ) < 0 )
376 msg_Err( p_access, "cannot read sector %i", p_sys->i_sector );
377 block_Release( p_block );
379 /* Try to skip one sector (in case of bad sectors) */
381 p_access->info.i_pos += VCD_DATA_SIZE;
385 /* Update seekpoints */
386 for( i_read = 0; i_read < i_blocks; i_read++ )
388 input_title_t *t = p_sys->title[p_access->info.i_title];
390 if( t->i_seekpoint > 0 &&
391 p_access->info.i_seekpoint + 1 < t->i_seekpoint &&
392 p_access->info.i_pos + i_read * VCD_DATA_SIZE >=
393 t->seekpoint[p_access->info.i_seekpoint+1]->i_byte_offset )
395 msg_Dbg( p_access, "seekpoint change" );
396 p_access->info.i_update |= INPUT_UPDATE_SEEKPOINT;
397 p_access->info.i_seekpoint++;
401 /* Update a few values */
402 p_sys->i_sector += i_blocks;
403 p_access->info.i_pos += p_block->i_buffer;
408 /*****************************************************************************
410 *****************************************************************************/
411 static int Seek( access_t *p_access, uint64_t i_pos )
413 access_sys_t *p_sys = p_access->p_sys;
414 input_title_t *t = p_sys->title[p_access->info.i_title];
417 /* Next sector to read */
418 p_access->info.i_pos = i_pos;
419 p_sys->i_sector = i_pos / VCD_DATA_SIZE +
420 p_sys->p_sectors[p_access->info.i_title + 1];
422 /* Update current seekpoint */
423 for( i_seekpoint = 0; i_seekpoint < t->i_seekpoint; i_seekpoint++ )
425 if( i_seekpoint + 1 >= t->i_seekpoint ) break;
426 if( i_pos < t->seekpoint[i_seekpoint + 1]->i_byte_offset ) break;
429 if( i_seekpoint != p_access->info.i_seekpoint )
431 msg_Dbg( p_access, "seekpoint change" );
432 p_access->info.i_update |= INPUT_UPDATE_SEEKPOINT;
433 p_access->info.i_seekpoint = i_seekpoint;
437 p_access->info.b_eof = false;
442 /*****************************************************************************
443 * EntryPoints: Reads the information about the entry points on the disc.
444 *****************************************************************************/
445 static int EntryPoints( access_t *p_access )
447 access_sys_t *p_sys = p_access->p_sys;
448 uint8_t sector[VCD_DATA_SIZE];
450 entries_sect_t entries;
453 /* Read the entry point sector */
454 if( ioctl_ReadSectors( VLC_OBJECT(p_access), p_sys->vcddev,
455 VCD_ENTRIES_SECTOR, sector, 1, VCD_TYPE ) < 0 )
457 msg_Err( p_access, "could not read entry points sector" );
460 memcpy( &entries, sector, CD_SECTOR_SIZE );
462 i_nb = GetWBE( &entries.i_entries_nb );
465 msg_Err( p_access, "invalid entry points number" );
469 if( strncmp( entries.psz_id, "ENTRYVCD", sizeof( entries.psz_id ) ) &&
470 strncmp( entries.psz_id, "ENTRYSVD", sizeof( entries.psz_id ) ) )
472 msg_Err( p_access, "unrecognized entry points format" );
476 for( i = 0; i < i_nb; i++ )
478 const int i_title = BCD_TO_BIN(entries.entry[i].i_track) - 2;
480 (MSF_TO_LBA2( BCD_TO_BIN( entries.entry[i].msf.minute ),
481 BCD_TO_BIN( entries.entry[i].msf.second ),
482 BCD_TO_BIN( entries.entry[i].msf.frame ) ));
485 if( i_title < 0 ) continue; /* Should not occur */
486 if( i_title >= p_sys->i_titles ) continue;
488 msg_Dbg( p_access, "Entry[%d] title=%d sector=%d",
489 i, i_title, i_sector );
491 s = vlc_seekpoint_New();
492 s->i_byte_offset = (i_sector - p_sys->p_sectors[i_title+1]) *
495 TAB_APPEND( p_sys->title[i_title]->i_seekpoint,
496 p_sys->title[i_title]->seekpoint, s );