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 *****************************************************************************/
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" );
63 add_shortcut( "svcd" );
66 /*****************************************************************************
68 *****************************************************************************/
70 /* how many blocks VCDRead will read in each loop */
71 #define VCD_BLOCKS_ONCE 20
72 #define VCD_DATA_ONCE (VCD_BLOCKS_ONCE * VCD_DATA_SIZE)
76 vcddev_t *vcddev; /* vcd device descriptor */
80 input_title_t *title[99]; /* No more that 99 track in a vcd ? */
83 int i_sector; /* Current Sector */
84 int *p_sectors; /* Track sectors */
87 static block_t *Block( access_t * );
88 static int Seek( access_t *, int64_t );
89 static int Control( access_t *, int, va_list );
90 static int EntryPoints( access_t * );
92 /*****************************************************************************
94 *****************************************************************************/
95 static int Open( vlc_object_t *p_this )
97 access_t *p_access = (access_t *)p_this;
99 char *psz_dup = ToLocaleDup( p_access->psz_path );
106 /* Command line: vcd://[dev_path][@title[,chapter]] */
107 if( ( psz = strchr( psz_dup, '@' ) ) )
111 i_title = strtol( psz, &psz, 0 );
113 i_chapter = strtol( psz+1, &psz, 0 );
116 if( *psz_dup == '\0' )
120 /* Only when selected */
121 if( strcmp( p_access->psz_access, "vcd" ) &&
122 strcmp( p_access->psz_access, "svcd" ) )
125 psz_dup = var_CreateGetString( p_access, "vcd" );
126 if( *psz_dup == '\0' )
134 if( psz_dup[0] && psz_dup[1] == ':' &&
135 psz_dup[2] == '\\' && psz_dup[3] == '\0' ) psz_dup[2] = '\0';
139 if( !(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 = malloc( sizeof( access_sys_t ) );
158 memset( p_sys, 0, sizeof( access_sys_t ) );
159 p_sys->vcddev = vcddev;
161 /* We read the Table Of Content information */
162 p_sys->i_titles = ioctl_GetTracksMap( VLC_OBJECT(p_access),
163 p_sys->vcddev, &p_sys->p_sectors );
164 if( p_sys->i_titles < 0 )
166 msg_Err( p_access, "unable to count tracks" );
169 else if( p_sys->i_titles <= 1 )
171 msg_Err( p_access, "no movie tracks found" );
174 /* The first title isn't usable */
177 /* Build title table */
178 for( i = 0; i < p_sys->i_titles; i++ )
180 input_title_t *t = p_sys->title[i] = vlc_input_title_New();
182 msg_Dbg( p_access, "title[%d] start=%d\n", i, p_sys->p_sectors[1+i] );
183 msg_Dbg( p_access, "title[%d] end=%d\n", i, p_sys->p_sectors[i+2] );
185 t->i_size = ( p_sys->p_sectors[i+2] - p_sys->p_sectors[i+1] ) *
186 (int64_t)VCD_DATA_SIZE;
189 /* Map entry points into chapters */
190 if( EntryPoints( p_access ) )
192 msg_Warn( p_access, "could not read entry points, will not use them" );
195 /* Starting title/chapter and sector */
196 if( i_title >= p_sys->i_titles )
198 if( i_chapter >= p_sys->title[i_title]->i_seekpoint )
201 p_sys->i_sector = p_sys->p_sectors[1+i_title];
205 ( p_sys->title[i_title]->seekpoint[i_chapter]->i_byte_offset /
208 p_access->info.i_title = i_title;
209 p_access->info.i_seekpoint = i_chapter;
210 p_access->info.i_size = p_sys->title[i_title]->i_size;
211 p_access->info.i_pos = ( p_sys->i_sector - p_sys->p_sectors[1+i_title] ) *
214 free( p_access->psz_demux );
215 p_access->psz_demux = strdup( "ps" );
220 ioctl_Close( VLC_OBJECT(p_access), p_sys->vcddev );
225 /*****************************************************************************
227 *****************************************************************************/
228 static void Close( vlc_object_t *p_this )
230 access_t *p_access = (access_t *)p_this;
231 access_sys_t *p_sys = p_access->p_sys;
233 ioctl_Close( p_this, p_sys->vcddev );
237 /*****************************************************************************
239 *****************************************************************************/
240 static int Control( access_t *p_access, int i_query, va_list args )
242 access_sys_t *p_sys = p_access->p_sys;
246 input_title_t ***ppp_title;
252 case ACCESS_CAN_SEEK:
253 case ACCESS_CAN_FASTSEEK:
254 case ACCESS_CAN_PAUSE:
255 case ACCESS_CAN_CONTROL_PACE:
256 pb_bool = (bool*)va_arg( args, bool* );
262 pi_int = (int*)va_arg( args, int * );
263 *pi_int = VCD_DATA_ONCE;
266 case ACCESS_GET_PTS_DELAY:
267 pi_64 = (int64_t*)va_arg( args, int64_t * );
268 *pi_64 = var_GetInteger( p_access, "vcd-caching" ) * 1000;
272 case ACCESS_SET_PAUSE_STATE:
275 case ACCESS_GET_TITLE_INFO:
276 ppp_title = (input_title_t***)va_arg( args, input_title_t*** );
277 pi_int = (int*)va_arg( args, int* );
279 /* Duplicate title infos */
280 *pi_int = p_sys->i_titles;
281 *ppp_title = malloc( sizeof(input_title_t **) * p_sys->i_titles );
282 for( i = 0; i < p_sys->i_titles; i++ )
284 (*ppp_title)[i] = vlc_input_title_Duplicate( p_sys->title[i] );
288 case ACCESS_SET_TITLE:
289 i = (int)va_arg( args, int );
290 if( i != p_access->info.i_title )
293 p_access->info.i_update |=
294 INPUT_UPDATE_TITLE|INPUT_UPDATE_SEEKPOINT|INPUT_UPDATE_SIZE;
295 p_access->info.i_title = i;
296 p_access->info.i_seekpoint = 0;
297 p_access->info.i_size = p_sys->title[i]->i_size;
298 p_access->info.i_pos = 0;
300 /* Next sector to read */
301 p_sys->i_sector = p_sys->p_sectors[1+i];
305 case ACCESS_SET_SEEKPOINT:
307 input_title_t *t = p_sys->title[p_access->info.i_title];
308 i = (int)va_arg( args, int );
309 if( t->i_seekpoint > 0 )
311 p_access->info.i_update |= INPUT_UPDATE_SEEKPOINT;
312 p_access->info.i_seekpoint = i;
314 p_sys->i_sector = p_sys->p_sectors[1+p_access->info.i_title] +
315 t->seekpoint[i]->i_byte_offset / VCD_DATA_SIZE;
317 p_access->info.i_pos = (int64_t)(p_sys->i_sector -
318 p_sys->p_sectors[1+p_access->info.i_title]) *VCD_DATA_SIZE;
323 case ACCESS_SET_PRIVATE_ID_STATE:
324 case ACCESS_GET_CONTENT_TYPE:
328 msg_Warn( p_access, "unimplemented query in control" );
335 /*****************************************************************************
337 *****************************************************************************/
338 static block_t *Block( access_t *p_access )
340 access_sys_t *p_sys = p_access->p_sys;
341 int i_blocks = VCD_BLOCKS_ONCE;
345 /* Check end of file */
346 if( p_access->info.b_eof ) return NULL;
348 /* Check end of title */
349 while( p_sys->i_sector >= p_sys->p_sectors[p_access->info.i_title + 2] )
351 if( p_access->info.i_title + 2 >= p_sys->i_titles )
353 p_access->info.b_eof = true;
357 p_access->info.i_update |=
358 INPUT_UPDATE_TITLE | INPUT_UPDATE_SEEKPOINT | INPUT_UPDATE_SIZE;
359 p_access->info.i_title++;
360 p_access->info.i_seekpoint = 0;
361 p_access->info.i_size =
362 p_sys->title[p_access->info.i_title]->i_size;
363 p_access->info.i_pos = 0;
366 /* Don't read after the end of a title */
367 if( p_sys->i_sector + i_blocks >=
368 p_sys->p_sectors[p_access->info.i_title + 2] )
370 i_blocks = p_sys->p_sectors[p_access->info.i_title + 2 ] -
374 /* Do the actual reading */
375 if( !( p_block = block_New( p_access, i_blocks * VCD_DATA_SIZE ) ) )
377 msg_Err( p_access, "cannot get a new block of size: %i",
378 i_blocks * VCD_DATA_SIZE );
382 if( ioctl_ReadSectors( VLC_OBJECT(p_access), p_sys->vcddev,
383 p_sys->i_sector, p_block->p_buffer, i_blocks, VCD_TYPE ) < 0 )
385 msg_Err( p_access, "cannot read sector %i", p_sys->i_sector );
386 block_Release( p_block );
388 /* Try to skip one sector (in case of bad sectors) */
390 p_access->info.i_pos += VCD_DATA_SIZE;
394 /* Update seekpoints */
395 for( i_read = 0; i_read < i_blocks; i_read++ )
397 input_title_t *t = p_sys->title[p_access->info.i_title];
399 if( t->i_seekpoint > 0 &&
400 p_access->info.i_seekpoint + 1 < t->i_seekpoint &&
401 p_access->info.i_pos + i_read * VCD_DATA_SIZE >=
402 t->seekpoint[p_access->info.i_seekpoint+1]->i_byte_offset )
404 msg_Dbg( p_access, "seekpoint change" );
405 p_access->info.i_update |= INPUT_UPDATE_SEEKPOINT;
406 p_access->info.i_seekpoint++;
410 /* Update a few values */
411 p_sys->i_sector += i_blocks;
412 p_access->info.i_pos += p_block->i_buffer;
417 /*****************************************************************************
419 *****************************************************************************/
420 static int Seek( access_t *p_access, int64_t i_pos )
422 access_sys_t *p_sys = p_access->p_sys;
423 input_title_t *t = p_sys->title[p_access->info.i_title];
426 /* Next sector to read */
427 p_access->info.i_pos = i_pos;
428 p_sys->i_sector = i_pos / VCD_DATA_SIZE +
429 p_sys->p_sectors[p_access->info.i_title + 1];
431 /* Update current seekpoint */
432 for( i_seekpoint = 0; i_seekpoint < t->i_seekpoint; i_seekpoint++ )
434 if( i_seekpoint + 1 >= t->i_seekpoint ) break;
435 if( i_pos < t->seekpoint[i_seekpoint + 1]->i_byte_offset ) break;
438 if( i_seekpoint != p_access->info.i_seekpoint )
440 msg_Dbg( p_access, "seekpoint change" );
441 p_access->info.i_update |= INPUT_UPDATE_SEEKPOINT;
442 p_access->info.i_seekpoint = i_seekpoint;
446 p_access->info.b_eof = false;
451 /*****************************************************************************
452 * EntryPoints: Reads the information about the entry points on the disc.
453 *****************************************************************************/
454 static int EntryPoints( access_t *p_access )
456 access_sys_t *p_sys = p_access->p_sys;
457 uint8_t sector[VCD_DATA_SIZE];
459 entries_sect_t entries;
462 /* Read the entry point sector */
463 if( ioctl_ReadSectors( VLC_OBJECT(p_access), p_sys->vcddev,
464 VCD_ENTRIES_SECTOR, sector, 1, VCD_TYPE ) < 0 )
466 msg_Err( p_access, "could not read entry points sector" );
469 memcpy( &entries, sector, CD_SECTOR_SIZE );
471 i_nb = GetWBE( &entries.i_entries_nb );
474 msg_Err( p_access, "invalid entry points number" );
478 if( strncmp( entries.psz_id, "ENTRYVCD", sizeof( entries.psz_id ) ) &&
479 strncmp( entries.psz_id, "ENTRYSVD", sizeof( entries.psz_id ) ) )
481 msg_Err( p_access, "unrecognized entry points format" );
485 for( i = 0; i < i_nb; i++ )
487 const int i_title = BCD_TO_BIN(entries.entry[i].i_track) - 2;
489 (MSF_TO_LBA2( BCD_TO_BIN( entries.entry[i].msf.minute ),
490 BCD_TO_BIN( entries.entry[i].msf.second ),
491 BCD_TO_BIN( entries.entry[i].msf.frame ) ));
494 if( i_title < 0 ) continue; /* Should not occur */
495 if( i_title >= p_sys->i_titles ) continue;
497 msg_Dbg( p_access, "Entry[%d] title=%d sector=%d\n",
498 i, i_title, i_sector );
500 s = vlc_seekpoint_New();
501 s->i_byte_offset = (i_sector - p_sys->p_sectors[i_title+1]) *
504 TAB_APPEND( p_sys->title[i_title]->i_seekpoint,
505 p_sys->title[i_title]->seekpoint, s );