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 *****************************************************************************/
29 #include <vlc_input.h>
30 #include <vlc_access.h>
34 /*****************************************************************************
36 *****************************************************************************/
37 static int Open ( vlc_object_t * );
38 static void Close( vlc_object_t * );
40 #define CACHING_TEXT N_("Caching value in ms")
41 #define CACHING_LONGTEXT N_( \
42 "Caching value for VCDs. This " \
43 "value should be set in milliseconds." )
46 set_shortname( _("VCD"));
47 set_description( _("VCD input") );
48 set_capability( "access2", 60 );
49 set_callbacks( Open, Close );
50 set_category( CAT_INPUT );
51 set_subcategory( SUBCAT_INPUT_ACCESS );
53 add_usage_hint( N_("[vcd:][device][@[title][,[chapter]]]") );
54 add_integer( "vcd-caching", DEFAULT_PTS_DELAY / 1000, NULL, CACHING_TEXT,
55 CACHING_LONGTEXT, VLC_TRUE );
56 add_shortcut( "vcd" );
57 add_shortcut( "svcd" );
60 /*****************************************************************************
62 *****************************************************************************/
64 /* how many blocks VCDRead will read in each loop */
65 #define VCD_BLOCKS_ONCE 20
66 #define VCD_DATA_ONCE (VCD_BLOCKS_ONCE * VCD_DATA_SIZE)
70 vcddev_t *vcddev; /* vcd device descriptor */
74 input_title_t *title[99]; /* No more that 99 track in a vcd ? */
77 int i_sector; /* Current Sector */
78 int *p_sectors; /* Track sectors */
81 static block_t *Block( access_t * );
82 static int Seek( access_t *, int64_t );
83 static int Control( access_t *, int, va_list );
84 static int EntryPoints( access_t * );
86 /*****************************************************************************
88 *****************************************************************************/
89 static int Open( vlc_object_t *p_this )
91 access_t *p_access = (access_t *)p_this;
93 char *psz_dup = strdup( p_access->psz_path );
100 /* Command line: vcd://[dev_path][@title[,chapter]] */
101 if( ( psz = strchr( psz_dup, '@' ) ) )
105 i_title = strtol( psz, &psz, 0 );
107 i_chapter = strtol( psz+1, &psz, 0 );
110 if( *psz_dup == '\0' )
114 /* Only when selected */
115 if( strcmp( p_access->psz_access, "vcd" ) &&
116 strcmp( p_access->psz_access, "svcd" ) )
119 psz_dup = var_CreateGetString( p_access, "vcd" );
120 if( *psz_dup == '\0' )
128 if( psz_dup[0] && psz_dup[1] == ':' &&
129 psz_dup[2] == '\\' && psz_dup[3] == '\0' ) psz_dup[2] = '\0';
133 if( !(vcddev = ioctl_Open( p_this, psz_dup )) )
140 /* Set up p_access */
141 p_access->pf_read = NULL;
142 p_access->pf_block = Block;
143 p_access->pf_control = Control;
144 p_access->pf_seek = Seek;
145 p_access->info.i_update = 0;
146 p_access->info.i_size = 0;
147 p_access->info.i_pos = 0;
148 p_access->info.b_eof = VLC_FALSE;
149 p_access->info.i_title = 0;
150 p_access->info.i_seekpoint = 0;
151 p_access->p_sys = p_sys = malloc( sizeof( access_sys_t ) );
152 memset( p_sys, 0, sizeof( access_sys_t ) );
153 p_sys->vcddev = vcddev;
155 /* We read the Table Of Content information */
156 p_sys->i_titles = ioctl_GetTracksMap( VLC_OBJECT(p_access),
157 p_sys->vcddev, &p_sys->p_sectors );
158 if( p_sys->i_titles < 0 )
160 msg_Err( p_access, "unable to count tracks" );
163 else if( p_sys->i_titles <= 1 )
165 msg_Err( p_access, "no movie tracks found" );
168 /* The first title isn't usable */
171 /* Build title table */
172 for( i = 0; i < p_sys->i_titles; i++ )
174 input_title_t *t = p_sys->title[i] = vlc_input_title_New();
176 msg_Dbg( p_access, "title[%d] start=%d\n", i, p_sys->p_sectors[1+i] );
177 msg_Dbg( p_access, "title[%d] end=%d\n", i, p_sys->p_sectors[i+2] );
179 t->i_size = ( p_sys->p_sectors[i+2] - p_sys->p_sectors[i+1] ) *
180 (int64_t)VCD_DATA_SIZE;
183 /* Map entry points into chapters */
184 if( EntryPoints( p_access ) )
186 msg_Warn( p_access, "could not read entry points, will not use them" );
189 /* Starting title/chapter and sector */
190 if( i_title >= p_sys->i_titles )
192 if( i_chapter >= p_sys->title[i_title]->i_seekpoint )
195 p_sys->i_sector = p_sys->p_sectors[1+i_title];
199 ( p_sys->title[i_title]->seekpoint[i_chapter]->i_byte_offset /
202 p_access->info.i_title = i_title;
203 p_access->info.i_seekpoint = i_chapter;
204 p_access->info.i_size = p_sys->title[i_title]->i_size;
205 p_access->info.i_pos = ( p_sys->i_sector - p_sys->p_sectors[1+i_title] ) *
208 p_access->psz_demux = strdup( "ps" );
213 ioctl_Close( VLC_OBJECT(p_access), p_sys->vcddev );
218 /*****************************************************************************
220 *****************************************************************************/
221 static void Close( vlc_object_t *p_this )
223 access_t *p_access = (access_t *)p_this;
224 access_sys_t *p_sys = p_access->p_sys;
226 ioctl_Close( p_this, p_sys->vcddev );
230 /*****************************************************************************
232 *****************************************************************************/
233 static int Control( access_t *p_access, int i_query, va_list args )
235 access_sys_t *p_sys = p_access->p_sys;
239 input_title_t ***ppp_title;
245 case ACCESS_CAN_SEEK:
246 case ACCESS_CAN_FASTSEEK:
247 case ACCESS_CAN_PAUSE:
248 case ACCESS_CAN_CONTROL_PACE:
249 pb_bool = (vlc_bool_t*)va_arg( args, vlc_bool_t* );
255 pi_int = (int*)va_arg( args, int * );
256 *pi_int = VCD_DATA_ONCE;
259 case ACCESS_GET_PTS_DELAY:
260 pi_64 = (int64_t*)va_arg( args, int64_t * );
261 *pi_64 = var_GetInteger( p_access, "vcd-caching" ) * 1000;
265 case ACCESS_SET_PAUSE_STATE:
268 case ACCESS_GET_TITLE_INFO:
269 ppp_title = (input_title_t***)va_arg( args, input_title_t*** );
270 pi_int = (int*)va_arg( args, int* );
272 /* Duplicate title infos */
273 *pi_int = p_sys->i_titles;
274 *ppp_title = malloc( sizeof(input_title_t **) * p_sys->i_titles );
275 for( i = 0; i < p_sys->i_titles; i++ )
277 (*ppp_title)[i] = vlc_input_title_Duplicate( p_sys->title[i] );
281 case ACCESS_SET_TITLE:
282 i = (int)va_arg( args, int );
283 if( i != p_access->info.i_title )
286 p_access->info.i_update |=
287 INPUT_UPDATE_TITLE|INPUT_UPDATE_SEEKPOINT|INPUT_UPDATE_SIZE;
288 p_access->info.i_title = i;
289 p_access->info.i_seekpoint = 0;
290 p_access->info.i_size = p_sys->title[i]->i_size;
291 p_access->info.i_pos = 0;
293 /* Next sector to read */
294 p_sys->i_sector = p_sys->p_sectors[1+i];
298 case ACCESS_SET_SEEKPOINT:
300 input_title_t *t = p_sys->title[p_access->info.i_title];
301 i = (int)va_arg( args, int );
302 if( t->i_seekpoint > 0 )
304 p_access->info.i_update |= INPUT_UPDATE_SEEKPOINT;
305 p_access->info.i_seekpoint = i;
307 p_sys->i_sector = p_sys->p_sectors[1+p_access->info.i_title] +
308 t->seekpoint[i]->i_byte_offset / VCD_DATA_SIZE;
310 p_access->info.i_pos = (int64_t)(p_sys->i_sector -
311 p_sys->p_sectors[1+p_access->info.i_title]) *VCD_DATA_SIZE;
316 case ACCESS_SET_PRIVATE_ID_STATE:
320 msg_Warn( p_access, "unimplemented query in control" );
327 /*****************************************************************************
329 *****************************************************************************/
330 static block_t *Block( access_t *p_access )
332 access_sys_t *p_sys = p_access->p_sys;
333 int i_blocks = VCD_BLOCKS_ONCE;
337 /* Check end of file */
338 if( p_access->info.b_eof ) return NULL;
340 /* Check end of title */
341 while( p_sys->i_sector >= p_sys->p_sectors[p_access->info.i_title + 2] )
343 if( p_access->info.i_title + 2 >= p_sys->i_titles )
345 p_access->info.b_eof = VLC_TRUE;
349 p_access->info.i_update |=
350 INPUT_UPDATE_TITLE | INPUT_UPDATE_SEEKPOINT | INPUT_UPDATE_SIZE;
351 p_access->info.i_title++;
352 p_access->info.i_seekpoint = 0;
353 p_access->info.i_size =
354 p_sys->title[p_access->info.i_title]->i_size;
355 p_access->info.i_pos = 0;
358 /* Don't read after the end of a title */
359 if( p_sys->i_sector + i_blocks >=
360 p_sys->p_sectors[p_access->info.i_title + 2] )
362 i_blocks = p_sys->p_sectors[p_access->info.i_title + 2 ] -
366 /* Do the actual reading */
367 if( !( p_block = block_New( p_access, i_blocks * VCD_DATA_SIZE ) ) )
369 msg_Err( p_access, "cannot get a new block of size: %i",
370 i_blocks * VCD_DATA_SIZE );
374 if( ioctl_ReadSectors( VLC_OBJECT(p_access), p_sys->vcddev,
375 p_sys->i_sector, p_block->p_buffer, i_blocks, VCD_TYPE ) < 0 )
377 msg_Err( p_access, "cannot read sector %i", p_sys->i_sector );
378 block_Release( p_block );
380 /* Try to skip one sector (in case of bad sectors) */
382 p_access->info.i_pos += VCD_DATA_SIZE;
386 /* Update seekpoints */
387 for( i_read = 0; i_read < i_blocks; i_read++ )
389 input_title_t *t = p_sys->title[p_access->info.i_title];
391 if( t->i_seekpoint > 0 &&
392 p_access->info.i_seekpoint + 1 < t->i_seekpoint &&
393 p_access->info.i_pos + i_read * VCD_DATA_SIZE >=
394 t->seekpoint[p_access->info.i_seekpoint+1]->i_byte_offset )
396 msg_Dbg( p_access, "seekpoint change" );
397 p_access->info.i_update |= INPUT_UPDATE_SEEKPOINT;
398 p_access->info.i_seekpoint++;
402 /* Update a few values */
403 p_sys->i_sector += i_blocks;
404 p_access->info.i_pos += p_block->i_buffer;
409 /*****************************************************************************
411 *****************************************************************************/
412 static int Seek( access_t *p_access, int64_t i_pos )
414 access_sys_t *p_sys = p_access->p_sys;
415 input_title_t *t = p_sys->title[p_access->info.i_title];
418 /* Next sector to read */
419 p_access->info.i_pos = i_pos;
420 p_sys->i_sector = i_pos / VCD_DATA_SIZE +
421 p_sys->p_sectors[p_access->info.i_title + 1];
423 /* Update current seekpoint */
424 for( i_seekpoint = 0; i_seekpoint < t->i_seekpoint; i_seekpoint++ )
426 if( i_seekpoint + 1 >= t->i_seekpoint ) break;
427 if( i_pos < t->seekpoint[i_seekpoint + 1]->i_byte_offset ) break;
430 if( i_seekpoint != p_access->info.i_seekpoint )
432 msg_Dbg( p_access, "seekpoint change" );
433 p_access->info.i_update |= INPUT_UPDATE_SEEKPOINT;
434 p_access->info.i_seekpoint = i_seekpoint;
438 p_access->info.b_eof = VLC_FALSE;
443 /*****************************************************************************
444 * EntryPoints: Reads the information about the entry points on the disc.
445 *****************************************************************************/
446 static int EntryPoints( access_t *p_access )
448 access_sys_t *p_sys = p_access->p_sys;
449 uint8_t sector[VCD_DATA_SIZE];
451 entries_sect_t entries;
454 /* Read the entry point sector */
455 if( ioctl_ReadSectors( VLC_OBJECT(p_access), p_sys->vcddev,
456 VCD_ENTRIES_SECTOR, sector, 1, VCD_TYPE ) < 0 )
458 msg_Err( p_access, "could not read entry points sector" );
461 memcpy( &entries, sector, CD_SECTOR_SIZE );
463 i_nb = GetWBE( &entries.i_entries_nb );
466 msg_Err( p_access, "invalid entry points number" );
470 if( strncmp( entries.psz_id, "ENTRYVCD", sizeof( entries.psz_id ) ) &&
471 strncmp( entries.psz_id, "ENTRYSVD", sizeof( entries.psz_id ) ) )
473 msg_Err( p_access, "unrecognized entry points format" );
477 for( i = 0; i < i_nb; i++ )
479 const int i_title = BCD_TO_BIN(entries.entry[i].i_track) - 2;
481 (MSF_TO_LBA2( BCD_TO_BIN( entries.entry[i].msf.minute ),
482 BCD_TO_BIN( entries.entry[i].msf.second ),
483 BCD_TO_BIN( entries.entry[i].msf.frame ) ));
486 if( i_title < 0 ) continue; /* Should not occur */
487 if( i_title >= p_sys->i_titles ) continue;
489 msg_Dbg( p_access, "Entry[%d] title=%d sector=%d\n",
490 i, i_title, i_sector );
492 s = vlc_seekpoint_New();
493 s->i_byte_offset = (i_sector - p_sys->p_sectors[i_title+1]) *
496 TAB_APPEND( p_sys->title[i_title]->i_seekpoint,
497 p_sys->title[i_title]->seekpoint, s );