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>
38 /*****************************************************************************
40 *****************************************************************************/
41 static int Open ( vlc_object_t * );
42 static void Close( vlc_object_t * );
44 #define CACHING_TEXT N_("Caching value in ms")
45 #define CACHING_LONGTEXT N_( \
46 "Caching value for VCDs. This " \
47 "value should be set in milliseconds." )
50 set_shortname( _("VCD"));
51 set_description( _("VCD input") );
52 set_capability( "access2", 60 );
53 set_callbacks( Open, Close );
54 set_category( CAT_INPUT );
55 set_subcategory( SUBCAT_INPUT_ACCESS );
57 add_usage_hint( N_("[vcd:][device][@[title][,[chapter]]]") );
58 add_integer( "vcd-caching", DEFAULT_PTS_DELAY / 1000, NULL, CACHING_TEXT,
59 CACHING_LONGTEXT, true );
60 add_shortcut( "vcd" );
61 add_shortcut( "svcd" );
64 /*****************************************************************************
66 *****************************************************************************/
68 /* how many blocks VCDRead will read in each loop */
69 #define VCD_BLOCKS_ONCE 20
70 #define VCD_DATA_ONCE (VCD_BLOCKS_ONCE * VCD_DATA_SIZE)
74 vcddev_t *vcddev; /* vcd device descriptor */
78 input_title_t *title[99]; /* No more that 99 track in a vcd ? */
81 int i_sector; /* Current Sector */
82 int *p_sectors; /* Track sectors */
85 static block_t *Block( access_t * );
86 static int Seek( access_t *, int64_t );
87 static int Control( access_t *, int, va_list );
88 static int EntryPoints( access_t * );
90 /*****************************************************************************
92 *****************************************************************************/
93 static int Open( vlc_object_t *p_this )
95 access_t *p_access = (access_t *)p_this;
97 char *psz_dup = strdup( p_access->psz_path );
104 /* Command line: vcd://[dev_path][@title[,chapter]] */
105 if( ( psz = strchr( psz_dup, '@' ) ) )
109 i_title = strtol( psz, &psz, 0 );
111 i_chapter = strtol( psz+1, &psz, 0 );
114 if( *psz_dup == '\0' )
118 /* Only when selected */
119 if( strcmp( p_access->psz_access, "vcd" ) &&
120 strcmp( p_access->psz_access, "svcd" ) )
123 psz_dup = var_CreateGetString( p_access, "vcd" );
124 if( *psz_dup == '\0' )
132 if( psz_dup[0] && psz_dup[1] == ':' &&
133 psz_dup[2] == '\\' && psz_dup[3] == '\0' ) psz_dup[2] = '\0';
137 if( !(vcddev = ioctl_Open( p_this, psz_dup )) )
144 /* Set up p_access */
145 p_access->pf_read = NULL;
146 p_access->pf_block = Block;
147 p_access->pf_control = Control;
148 p_access->pf_seek = Seek;
149 p_access->info.i_update = 0;
150 p_access->info.i_size = 0;
151 p_access->info.i_pos = 0;
152 p_access->info.b_eof = false;
153 p_access->info.i_title = 0;
154 p_access->info.i_seekpoint = 0;
155 p_access->p_sys = p_sys = malloc( sizeof( access_sys_t ) );
156 memset( p_sys, 0, sizeof( access_sys_t ) );
157 p_sys->vcddev = vcddev;
159 /* We read the Table Of Content information */
160 p_sys->i_titles = ioctl_GetTracksMap( VLC_OBJECT(p_access),
161 p_sys->vcddev, &p_sys->p_sectors );
162 if( p_sys->i_titles < 0 )
164 msg_Err( p_access, "unable to count tracks" );
167 else if( p_sys->i_titles <= 1 )
169 msg_Err( p_access, "no movie tracks found" );
172 /* The first title isn't usable */
175 /* Build title table */
176 for( i = 0; i < p_sys->i_titles; i++ )
178 input_title_t *t = p_sys->title[i] = vlc_input_title_New();
180 msg_Dbg( p_access, "title[%d] start=%d\n", i, p_sys->p_sectors[1+i] );
181 msg_Dbg( p_access, "title[%d] end=%d\n", i, p_sys->p_sectors[i+2] );
183 t->i_size = ( p_sys->p_sectors[i+2] - p_sys->p_sectors[i+1] ) *
184 (int64_t)VCD_DATA_SIZE;
187 /* Map entry points into chapters */
188 if( EntryPoints( p_access ) )
190 msg_Warn( p_access, "could not read entry points, will not use them" );
193 /* Starting title/chapter and sector */
194 if( i_title >= p_sys->i_titles )
196 if( i_chapter >= p_sys->title[i_title]->i_seekpoint )
199 p_sys->i_sector = p_sys->p_sectors[1+i_title];
203 ( p_sys->title[i_title]->seekpoint[i_chapter]->i_byte_offset /
206 p_access->info.i_title = i_title;
207 p_access->info.i_seekpoint = i_chapter;
208 p_access->info.i_size = p_sys->title[i_title]->i_size;
209 p_access->info.i_pos = ( p_sys->i_sector - p_sys->p_sectors[1+i_title] ) *
212 p_access->psz_demux = strdup( "ps" );
217 ioctl_Close( VLC_OBJECT(p_access), p_sys->vcddev );
222 /*****************************************************************************
224 *****************************************************************************/
225 static void Close( vlc_object_t *p_this )
227 access_t *p_access = (access_t *)p_this;
228 access_sys_t *p_sys = p_access->p_sys;
230 ioctl_Close( p_this, p_sys->vcddev );
234 /*****************************************************************************
236 *****************************************************************************/
237 static int Control( access_t *p_access, int i_query, va_list args )
239 access_sys_t *p_sys = p_access->p_sys;
243 input_title_t ***ppp_title;
249 case ACCESS_CAN_SEEK:
250 case ACCESS_CAN_FASTSEEK:
251 case ACCESS_CAN_PAUSE:
252 case ACCESS_CAN_CONTROL_PACE:
253 pb_bool = (bool*)va_arg( args, bool* );
259 pi_int = (int*)va_arg( args, int * );
260 *pi_int = VCD_DATA_ONCE;
263 case ACCESS_GET_PTS_DELAY:
264 pi_64 = (int64_t*)va_arg( args, int64_t * );
265 *pi_64 = var_GetInteger( p_access, "vcd-caching" ) * 1000;
269 case ACCESS_SET_PAUSE_STATE:
272 case ACCESS_GET_TITLE_INFO:
273 ppp_title = (input_title_t***)va_arg( args, input_title_t*** );
274 pi_int = (int*)va_arg( args, int* );
276 /* Duplicate title infos */
277 *pi_int = p_sys->i_titles;
278 *ppp_title = malloc( sizeof(input_title_t **) * p_sys->i_titles );
279 for( i = 0; i < p_sys->i_titles; i++ )
281 (*ppp_title)[i] = vlc_input_title_Duplicate( p_sys->title[i] );
285 case ACCESS_SET_TITLE:
286 i = (int)va_arg( args, int );
287 if( i != p_access->info.i_title )
290 p_access->info.i_update |=
291 INPUT_UPDATE_TITLE|INPUT_UPDATE_SEEKPOINT|INPUT_UPDATE_SIZE;
292 p_access->info.i_title = i;
293 p_access->info.i_seekpoint = 0;
294 p_access->info.i_size = p_sys->title[i]->i_size;
295 p_access->info.i_pos = 0;
297 /* Next sector to read */
298 p_sys->i_sector = p_sys->p_sectors[1+i];
302 case ACCESS_SET_SEEKPOINT:
304 input_title_t *t = p_sys->title[p_access->info.i_title];
305 i = (int)va_arg( args, int );
306 if( t->i_seekpoint > 0 )
308 p_access->info.i_update |= INPUT_UPDATE_SEEKPOINT;
309 p_access->info.i_seekpoint = i;
311 p_sys->i_sector = p_sys->p_sectors[1+p_access->info.i_title] +
312 t->seekpoint[i]->i_byte_offset / VCD_DATA_SIZE;
314 p_access->info.i_pos = (int64_t)(p_sys->i_sector -
315 p_sys->p_sectors[1+p_access->info.i_title]) *VCD_DATA_SIZE;
320 case ACCESS_SET_PRIVATE_ID_STATE:
321 case ACCESS_GET_CONTENT_TYPE:
325 msg_Warn( p_access, "unimplemented query in control" );
332 /*****************************************************************************
334 *****************************************************************************/
335 static block_t *Block( access_t *p_access )
337 access_sys_t *p_sys = p_access->p_sys;
338 int i_blocks = VCD_BLOCKS_ONCE;
342 /* Check end of file */
343 if( p_access->info.b_eof ) return NULL;
345 /* Check end of title */
346 while( p_sys->i_sector >= p_sys->p_sectors[p_access->info.i_title + 2] )
348 if( p_access->info.i_title + 2 >= p_sys->i_titles )
350 p_access->info.b_eof = true;
354 p_access->info.i_update |=
355 INPUT_UPDATE_TITLE | INPUT_UPDATE_SEEKPOINT | INPUT_UPDATE_SIZE;
356 p_access->info.i_title++;
357 p_access->info.i_seekpoint = 0;
358 p_access->info.i_size =
359 p_sys->title[p_access->info.i_title]->i_size;
360 p_access->info.i_pos = 0;
363 /* Don't read after the end of a title */
364 if( p_sys->i_sector + i_blocks >=
365 p_sys->p_sectors[p_access->info.i_title + 2] )
367 i_blocks = p_sys->p_sectors[p_access->info.i_title + 2 ] -
371 /* Do the actual reading */
372 if( !( p_block = block_New( p_access, i_blocks * VCD_DATA_SIZE ) ) )
374 msg_Err( p_access, "cannot get a new block of size: %i",
375 i_blocks * VCD_DATA_SIZE );
379 if( ioctl_ReadSectors( VLC_OBJECT(p_access), p_sys->vcddev,
380 p_sys->i_sector, p_block->p_buffer, i_blocks, VCD_TYPE ) < 0 )
382 msg_Err( p_access, "cannot read sector %i", p_sys->i_sector );
383 block_Release( p_block );
385 /* Try to skip one sector (in case of bad sectors) */
387 p_access->info.i_pos += VCD_DATA_SIZE;
391 /* Update seekpoints */
392 for( i_read = 0; i_read < i_blocks; i_read++ )
394 input_title_t *t = p_sys->title[p_access->info.i_title];
396 if( t->i_seekpoint > 0 &&
397 p_access->info.i_seekpoint + 1 < t->i_seekpoint &&
398 p_access->info.i_pos + i_read * VCD_DATA_SIZE >=
399 t->seekpoint[p_access->info.i_seekpoint+1]->i_byte_offset )
401 msg_Dbg( p_access, "seekpoint change" );
402 p_access->info.i_update |= INPUT_UPDATE_SEEKPOINT;
403 p_access->info.i_seekpoint++;
407 /* Update a few values */
408 p_sys->i_sector += i_blocks;
409 p_access->info.i_pos += p_block->i_buffer;
414 /*****************************************************************************
416 *****************************************************************************/
417 static int Seek( access_t *p_access, int64_t i_pos )
419 access_sys_t *p_sys = p_access->p_sys;
420 input_title_t *t = p_sys->title[p_access->info.i_title];
423 /* Next sector to read */
424 p_access->info.i_pos = i_pos;
425 p_sys->i_sector = i_pos / VCD_DATA_SIZE +
426 p_sys->p_sectors[p_access->info.i_title + 1];
428 /* Update current seekpoint */
429 for( i_seekpoint = 0; i_seekpoint < t->i_seekpoint; i_seekpoint++ )
431 if( i_seekpoint + 1 >= t->i_seekpoint ) break;
432 if( i_pos < t->seekpoint[i_seekpoint + 1]->i_byte_offset ) break;
435 if( i_seekpoint != p_access->info.i_seekpoint )
437 msg_Dbg( p_access, "seekpoint change" );
438 p_access->info.i_update |= INPUT_UPDATE_SEEKPOINT;
439 p_access->info.i_seekpoint = i_seekpoint;
443 p_access->info.b_eof = false;
448 /*****************************************************************************
449 * EntryPoints: Reads the information about the entry points on the disc.
450 *****************************************************************************/
451 static int EntryPoints( access_t *p_access )
453 access_sys_t *p_sys = p_access->p_sys;
454 uint8_t sector[VCD_DATA_SIZE];
456 entries_sect_t entries;
459 /* Read the entry point sector */
460 if( ioctl_ReadSectors( VLC_OBJECT(p_access), p_sys->vcddev,
461 VCD_ENTRIES_SECTOR, sector, 1, VCD_TYPE ) < 0 )
463 msg_Err( p_access, "could not read entry points sector" );
466 memcpy( &entries, sector, CD_SECTOR_SIZE );
468 i_nb = GetWBE( &entries.i_entries_nb );
471 msg_Err( p_access, "invalid entry points number" );
475 if( strncmp( entries.psz_id, "ENTRYVCD", sizeof( entries.psz_id ) ) &&
476 strncmp( entries.psz_id, "ENTRYSVD", sizeof( entries.psz_id ) ) )
478 msg_Err( p_access, "unrecognized entry points format" );
482 for( i = 0; i < i_nb; i++ )
484 const int i_title = BCD_TO_BIN(entries.entry[i].i_track) - 2;
486 (MSF_TO_LBA2( BCD_TO_BIN( entries.entry[i].msf.minute ),
487 BCD_TO_BIN( entries.entry[i].msf.second ),
488 BCD_TO_BIN( entries.entry[i].msf.frame ) ));
491 if( i_title < 0 ) continue; /* Should not occur */
492 if( i_title >= p_sys->i_titles ) continue;
494 msg_Dbg( p_access, "Entry[%d] title=%d sector=%d\n",
495 i, i_title, i_sector );
497 s = vlc_seekpoint_New();
498 s->i_byte_offset = (i_sector - p_sys->p_sectors[i_title+1]) *
501 TAB_APPEND( p_sys->title[i_title]->i_seekpoint,
502 p_sys->title[i_title]->seekpoint, s );