0bcca32e6c8427f996dbe5f934bfcea78d6719be
[vlc.git] / modules / access / dvdread / input.c
1 /*****************************************************************************
2  * input.c: DvdRead plugin.
3  *****************************************************************************
4  * This plugins should handle all the known specificities of the DVD format,
5  * especially the 2048 bytes logical block size.
6  * It depends on: libdvdread for ifo files and block reading.
7  *****************************************************************************
8  * Copyright (C) 2001 VideoLAN
9  * $Id: input.c,v 1.15 2003/01/28 15:05:52 massiot Exp $
10  *
11  * Author: St├ęphane Borel <stef@via.ecp.fr>
12  *
13  * Some code taken form the play_title.c by Billy Biggs <vektor@dumbterm.net>
14  * in libdvdread.
15  *
16  * This program is free software; you can redistribute it and/or modify
17  * it under the terms of the GNU General Public License as published by
18  * the Free Software Foundation; either version 2 of the License, or
19  * (at your option) any later version.
20  *
21  * This program is distributed in the hope that it will be useful,
22  * but WITHOUT ANY WARRANTY; without even the implied warranty of
23  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
24  * GNU General Public License for more details.
25  *
26  * You should have received a copy of the GNU General Public License
27  * along with this program; if not, write to the Free Software
28  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111, USA.
29  *****************************************************************************/
30
31 /*****************************************************************************
32  * Preamble
33  *****************************************************************************/
34 #include <stdio.h>
35 #include <stdlib.h>
36
37 #include <vlc/vlc.h>
38 #include <vlc/input.h>
39
40 #include "../../demux/mpeg/system.h"
41
42 #ifdef HAVE_UNISTD_H
43 #   include <unistd.h>
44 #endif
45
46 #include <fcntl.h>
47 #include <sys/types.h>
48 #include <sys/stat.h>
49 #include <string.h>
50 #include <errno.h>
51 #include <assert.h>
52
53 #ifdef STRNCASECMP_IN_STRINGS_H
54 #   include <strings.h>
55 #endif
56
57 #if defined( WIN32 )
58 #   include <io.h>                                                 /* read() */
59 #endif
60
61 #include <dvdread/dvd_reader.h>
62 #include <dvdread/ifo_types.h>
63 #include <dvdread/ifo_read.h>
64 #include <dvdread/nav_read.h>
65 #include <dvdread/nav_print.h>
66
67 #include "input.h"
68
69 #include "iso_lang.h"
70
71 /* how many blocks DVDRead will read in each loop */
72 #define DVD_BLOCK_READ_ONCE 64
73
74 /*****************************************************************************
75  * Private structure
76  *****************************************************************************/
77 struct demux_sys_t
78 {
79     module_t *   p_module;
80     mpeg_demux_t mpeg;
81 };
82
83 /*****************************************************************************
84  * Local prototypes
85  *****************************************************************************/
86 /* called from outside */
87 static int  DvdReadDemux    ( input_thread_t * );
88 static int  DvdReadRewind   ( input_thread_t * );
89
90 static int  DvdReadSetArea    ( input_thread_t *, input_area_t * );
91 static int  DvdReadSetProgram ( input_thread_t *, pgrm_descriptor_t * );
92 static int  DvdReadRead       ( input_thread_t *, byte_t *, size_t );
93 static void DvdReadSeek       ( input_thread_t *, off_t );
94
95 /* called only from here */
96 static void DvdReadLauchDecoders( input_thread_t * p_input );
97 static void DvdReadHandleDSI( thread_dvd_data_t * p_dvd, uint8_t * p_data );
98 static void DvdReadFindCell ( thread_dvd_data_t * p_dvd );
99
100 /*
101  * Data demux functions
102  */
103
104 /*****************************************************************************
105  * InitDVD: initialize DVD structures
106  *****************************************************************************/
107 int E_(InitDVD) ( vlc_object_t *p_this )
108 {
109     input_thread_t *p_input = (input_thread_t *)p_this;
110     demux_sys_t *   p_demux;
111
112     if( p_input->stream.i_method != INPUT_METHOD_DVD )
113     {
114         return VLC_EGENERIC;
115     }
116
117     p_demux = p_input->p_demux_data = malloc( sizeof(demux_sys_t ) );
118     if( p_demux == NULL )
119     {
120         return VLC_ENOMEM;
121     }
122
123     p_input->p_private = (void*)&p_demux->mpeg;
124     p_demux->p_module = module_Need( p_input, "mpeg-system", NULL );
125     if( p_demux->p_module == NULL )
126     {
127         free( p_input->p_demux_data );
128         return VLC_ENOMOD;
129     }
130
131     p_input->pf_demux = DvdReadDemux;
132     p_input->pf_rewind = NULL;
133
134     vlc_mutex_lock( &p_input->stream.stream_lock );
135
136     DvdReadLauchDecoders( p_input );
137
138     vlc_mutex_unlock( &p_input->stream.stream_lock );
139
140     return VLC_SUCCESS;
141 }
142
143 /*****************************************************************************
144  * EndDVD: end DVD structures
145  *****************************************************************************/
146 void E_(EndDVD) ( vlc_object_t *p_this )
147 {
148     input_thread_t *p_input = (input_thread_t *)p_this;
149
150     module_Unneed( p_input, p_input->p_demux_data->p_module );
151     free( p_input->p_demux_data );
152 }
153
154 /*****************************************************************************
155  * DvdReadDemux
156  *****************************************************************************/
157 #define PEEK( SIZE )                                                        \
158     i_result = input_Peek( p_input, &p_peek, SIZE );                        \
159     if( i_result == -1 )                                                    \
160     {                                                                       \
161         return -1;                                                          \
162     }                                                                       \
163     else if( i_result < SIZE )                                              \
164     {                                                                       \
165         /* EOF */                                                           \
166         return 0;                                                           \
167     }
168
169 static int DvdReadDemux( input_thread_t * p_input )
170 {
171     int                 i;
172     byte_t *            p_peek;
173     data_packet_t *     p_data;
174     ssize_t             i_result;
175     int                 i_packet_size;
176
177
178     /* Read headers to compute payload length */
179     for( i = 0 ; i < DVD_BLOCK_READ_ONCE ; i++ )
180     {
181
182         /* Read what we believe to be a packet header. */
183         PEEK( 4 );
184
185         /* Default header */
186         if( U32_AT( p_peek ) != 0x1BA )
187         {
188             /* That's the case for all packets, except pack header. */
189             i_packet_size = U16_AT( p_peek + 4 );
190         }
191         else
192         {
193             /* MPEG-2 Pack header. */
194             i_packet_size = 8;
195         }
196
197         /* Fetch a packet of the appropriate size. */
198         i_result = input_SplitBuffer( p_input, &p_data, i_packet_size + 6 );
199         if( i_result <= 0 )
200         {
201             return( i_result );
202         }
203
204         /* In MPEG-2 pack headers we still have to read stuffing bytes. */
205         if( (p_data->p_demux_start[3] == 0xBA) && (i_packet_size == 8) )
206         {
207             ssize_t i_stuffing = (p_data->p_demux_start[13] & 0x7);
208             /* Force refill of the input buffer - though we don't care
209              * about p_peek. Please note that this is unoptimized. */
210             PEEK( i_stuffing );
211             p_input->p_current_data += i_stuffing;
212         }
213
214         p_input->p_demux_data->mpeg.pf_demux_ps( p_input, p_data );
215
216     }
217
218     return i;
219 }
220
221 /*****************************************************************************
222  * DVDRewind : reads a stream backward
223  *****************************************************************************/
224 static int DvdReadRewind( input_thread_t * p_input )
225 {
226     return -1;
227 }
228
229 /*
230  * Data access functions
231  */
232
233 /*****************************************************************************
234  * OpenDVD: open libdvdread
235  *****************************************************************************/
236 int E_(OpenDVD) ( vlc_object_t *p_this )
237 {
238     input_thread_t *        p_input = (input_thread_t *)p_this;
239     char *                  psz_parser;
240     char *                  psz_source;
241     char *                  psz_next;
242     struct stat             stat_info;
243     thread_dvd_data_t *     p_dvd;
244     dvd_reader_t *          p_dvdread;
245     input_area_t *          p_area;
246     unsigned int            i_title = 1;
247     unsigned int            i_chapter = 1;
248     unsigned int            i_angle = 1;
249     unsigned int            i;
250
251     psz_source = strdup( p_input->psz_name );
252     if( psz_source == NULL )
253     {
254         return VLC_ENOMEM;
255     }
256
257     p_input->pf_read = DvdReadRead;
258     p_input->pf_seek = DvdReadSeek;
259     p_input->pf_set_area = DvdReadSetArea;
260     p_input->pf_set_program = DvdReadSetProgram;
261
262     /* Start with the end, because you could have :
263      * dvdread:/Volumes/my@toto/VIDEO_TS@1,1
264      * (yes, this is kludgy). */
265     for ( psz_parser = psz_source + strlen(psz_source) - 1;
266           psz_parser >= psz_source && *psz_parser != '@';
267           psz_parser-- );
268
269     if( psz_parser >= psz_source && *psz_parser == '@' )
270     {
271         /* Found options */
272         *psz_parser = '\0';
273         ++psz_parser;
274
275         i_title = (int)strtol( psz_parser, &psz_next, 10 );
276         if( *psz_next )
277         {
278             psz_parser = psz_next + 1;
279             i_chapter = (int)strtol( psz_parser, &psz_next, 10 );
280             if( *psz_next )
281             {
282                 i_angle = (int)strtol( psz_next + 1, NULL, 10 );
283             }
284         }
285
286         i_title = i_title ? i_title : 1;
287         i_chapter = i_chapter ? i_chapter : 1;
288         i_angle = i_angle ? i_angle : 1;
289     }
290
291     if( !*psz_source )
292     {
293         free( psz_source );
294         if( !p_input->psz_access )
295         {
296             return VLC_EGENERIC;
297         }
298         psz_source = config_GetPsz( p_input, "dvd" );
299         if( !psz_source ) return VLC_EGENERIC;
300     }
301
302     if( stat( psz_source, &stat_info ) == -1 )
303     {
304         msg_Warn( p_input, "cannot stat() source `%s' (%s)",
305                            psz_source, strerror(errno) );
306         free( psz_source );
307         return VLC_EGENERIC;
308     }
309     if( !S_ISBLK(stat_info.st_mode) &&
310         !S_ISCHR(stat_info.st_mode) &&
311         !S_ISDIR(stat_info.st_mode) )
312     {
313         msg_Warn( p_input, "dvdread module discarded (not a valid source)" );
314         free( psz_source );
315         return VLC_EGENERIC;
316     }
317
318     msg_Dbg( p_input, "dvdroot=%s title=%d chapter=%d angle=%d",
319                       psz_source, i_title, i_chapter, i_angle );
320
321
322     p_dvdread = DVDOpen( psz_source );
323
324     /* free allocated strings */
325     free( psz_source );
326
327     if( ! p_dvdread )
328     {
329         msg_Err( p_input, "libdvdcss cannot open source" );
330         return VLC_EGENERIC;
331     }
332
333     /* set up input  */
334     p_input->i_mtu = 0;
335
336     p_dvd = malloc( sizeof(thread_dvd_data_t) );
337     if( p_dvd == NULL )
338     {
339         msg_Err( p_input, "out of memory" );
340         return VLC_ENOMEM;
341     }
342
343     p_dvd->p_dvdread = p_dvdread;
344     p_dvd->p_title = NULL;
345     p_dvd->p_vts_file = NULL;
346
347
348     p_input->p_access_data = (void *)p_dvd;
349
350     /* Ifo allocation & initialisation */
351     if( ! ( p_dvd->p_vmg_file = ifoOpen( p_dvd->p_dvdread, 0 ) ) )
352     {
353         msg_Err( p_input, "cannot open VMG info" );
354         free( p_dvd );
355         return VLC_EGENERIC;
356     }
357     msg_Dbg( p_input, "VMG opened" );
358
359     /* Set stream and area data */
360     vlc_mutex_lock( &p_input->stream.stream_lock );
361
362     p_input->stream.i_method = INPUT_METHOD_DVD;
363
364     /* If we are here we can control the pace... */
365     p_input->stream.b_pace_control = VLC_TRUE;
366     p_input->stream.b_seekable = VLC_TRUE;
367     p_input->stream.b_connected = VLC_TRUE;
368
369     p_input->stream.p_selected_area->i_size = 0;
370     p_input->stream.p_selected_area->i_tell = 0;
371
372     /* Initialize ES structures */
373     input_InitStream( p_input, sizeof( stream_ps_data_t ) );
374
375     /* disc input method */
376     p_input->stream.i_method = INPUT_METHOD_DVD;
377
378 #define tt_srpt p_dvd->p_vmg_file->tt_srpt
379     msg_Dbg( p_input, "number of titles: %d", tt_srpt->nr_of_srpts );
380
381 #define area p_input->stream.pp_areas
382     /* We start from 1 here since the default area 0
383      * is reserved for video_ts.vob */
384     for( i = 1 ; i <= tt_srpt->nr_of_srpts ; i++ )
385     {
386         input_AddArea( p_input );
387
388         /* Titles are Program Chains */
389         area[i]->i_id = i;
390
391         /* Absolute start offset and size
392          * We can only set that with vts ifo, so we do it during the
393          * first call to DVDSetArea */
394         area[i]->i_start = 0;
395         area[i]->i_size = 0;
396
397         /* Number of chapters */
398         area[i]->i_part_nb = tt_srpt->title[i-1].nr_of_ptts;
399         area[i]->i_part = 1;
400
401         area[i]->i_plugin_data = tt_srpt->title[i-1].title_set_nr;
402     }
403 #undef area
404
405     p_dvd->i_title = i_title <= tt_srpt->nr_of_srpts ? i_title : 1;
406 #undef tt_srpt
407
408     p_area = p_input->stream.pp_areas[p_dvd->i_title];
409     p_dvd->i_chapter = i_chapter;
410
411     p_dvd->i_chapter = i_chapter < p_area->i_part_nb ? i_chapter : 1;
412     p_area->i_part = p_dvd->i_chapter;
413
414     p_dvd->i_angle = i_angle;
415
416     /* set title, chapter, audio and subpic */
417     if( DvdReadSetArea( p_input, p_area ) )
418     {
419         vlc_mutex_unlock( &p_input->stream.stream_lock );
420         return VLC_EGENERIC;
421     }
422
423     vlc_mutex_unlock( &p_input->stream.stream_lock );
424
425     if( !p_input->psz_demux || !*p_input->psz_demux )
426     {
427         p_input->psz_demux = "dvdread";
428     }
429
430     return VLC_SUCCESS;
431 }
432
433 /*****************************************************************************
434  * CloseDVD: close libdvdread
435  *****************************************************************************/
436 void E_(CloseDVD) ( vlc_object_t *p_this )
437 {
438     input_thread_t *    p_input = (input_thread_t *)p_this;
439     thread_dvd_data_t * p_dvd = (thread_dvd_data_t *)p_input->p_access_data;
440
441     /* This is a very nasty side-effect in the DVD plug-in : language
442      * selection here influences language selection of other streams. So
443      * unset those variables (may not be what the user wants).
444      * FIXME FIXME FIXME FIXME FIXME FIXME FIXME --Meuuh */
445     config_PutInt( p_input, "audio-channel", -1 );
446     config_PutInt( p_input, "spu-channel", -1 );
447
448     /* close libdvdread */
449     DVDCloseFile( p_dvd->p_title );
450     ifoClose( p_dvd->p_vts_file );
451     ifoClose( p_dvd->p_vmg_file );
452
453     DVDClose( p_dvd->p_dvdread );
454     free( p_dvd );
455     p_input->p_access_data = NULL;
456
457 }
458
459 /*****************************************************************************
460  * DvdReadSetProgram: Does nothing, a DVD is mono-program
461  *****************************************************************************/
462 static int DvdReadSetProgram( input_thread_t * p_input,
463                               pgrm_descriptor_t * p_program )
464 {
465     if( p_input->stream.p_selected_program != p_program )
466     {
467         thread_dvd_data_t *  p_dvd;
468
469         p_dvd = (thread_dvd_data_t*)(p_input->p_access_data);
470         p_dvd->i_angle = p_program->i_number;
471
472         memcpy( p_program, p_input->stream.p_selected_program,
473                 sizeof(pgrm_descriptor_t) );
474         p_program->i_number = p_dvd->i_angle;
475         p_input->stream.p_selected_program = p_program;
476
477         msg_Dbg( p_input, "angle %d selected", p_dvd->i_angle );
478     }
479
480     return VLC_SUCCESS;
481 }
482
483 #define p_pgc         p_dvd->p_cur_pgc
484
485 /*****************************************************************************
486  * DvdReadSetArea: initialize input data for title x, chapter y.
487  * It should be called for each user navigation request.
488  *****************************************************************************
489  * Take care that i_title starts from 0 (vmg) and i_chapter start from 1.
490  * Note that you have to take the lock before entering here.
491  *****************************************************************************/
492 static int DvdReadSetArea( input_thread_t * p_input, input_area_t * p_area )
493 {
494     thread_dvd_data_t *  p_dvd;
495     int                  pgc_id = 0;
496     int                  pgn = 0;
497
498     p_dvd = (thread_dvd_data_t*)p_input->p_access_data;
499
500     /* we can't use the interface slider until initilization is complete */
501     p_input->stream.b_seekable = VLC_FALSE;
502
503     if( p_area != p_input->stream.p_selected_area )
504     {
505         es_descriptor_t *    p_es;
506         unsigned int         i_cell = 0;
507         unsigned int         i_audio_nb = 0;
508         unsigned int         i_spu_nb = 0;
509         unsigned int         i;
510
511 #define p_vmg         p_dvd->p_vmg_file
512 #define p_vts         p_dvd->p_vts_file
513         if( p_dvd->p_title != NULL )
514         {
515             DVDCloseFile( p_dvd->p_title );
516         }
517
518         if( p_vts != NULL )
519         {
520             ifoClose( p_vts );
521         }
522
523         /* Reset the Chapter position of the old title */
524         p_input->stream.p_selected_area->i_part = 1;
525
526         /*
527          *  We have to load all title information
528          */
529         /* Change the default area */
530         p_input->stream.p_selected_area = p_area;
531
532         msg_Dbg( p_input, "open VTS %d, for title %d",
533             p_vmg->tt_srpt->title[ p_area->i_id - 1 ].title_set_nr,
534             p_area->i_id );
535
536         /* ifo vts */
537         if( ! ( p_vts = ifoOpen( p_dvd->p_dvdread,
538                 p_vmg->tt_srpt->title[ p_area->i_id - 1 ].title_set_nr ) ) )
539         {
540             msg_Err( p_input, "fatal error in vts ifo" );
541             ifoClose( p_vmg );
542             DVDClose( p_dvd->p_dvdread );
543             return VLC_EGENERIC;
544         }
545
546         /* title position inside the selected vts */
547         p_dvd->i_ttn = p_vmg->tt_srpt->title[ p_area->i_id - 1 ].vts_ttn;
548
549         /*
550          * Set selected title start
551          */
552         pgc_id = p_vts->vts_ptt_srpt->title[p_dvd->i_ttn-1].ptt[0].pgcn;
553         pgn = p_vts->vts_ptt_srpt->title[p_dvd->i_ttn-1].ptt[0].pgn;
554         p_pgc = p_vts->vts_pgcit->pgci_srp[ pgc_id - 1 ].pgc;
555         i_cell = p_pgc->program_map[ pgn - 1 ] - 1;
556
557         p_area->i_start =
558             LB2OFF( p_dvd->p_cur_pgc->cell_playback[ i_cell ].first_sector );
559
560         msg_Dbg( p_input, "start %d vts_title %d pgc %d pgn %d",
561                   p_area->i_id, p_dvd->i_ttn, pgc_id, pgn );
562
563         /*
564          * Find title end
565          */
566         i_cell = p_dvd->p_cur_pgc->nr_of_cells - 1;
567
568         p_dvd->i_end_block = p_pgc->cell_playback[ i_cell ].last_sector;
569         p_area->i_size = LB2OFF( p_dvd->i_end_block )- p_area->i_start;
570
571         msg_Dbg( p_input, "start "I64Fd" size "I64Fd" end %d",
572                   p_area->i_start , p_area->i_size, p_dvd->i_end_block );
573
574         /*
575          * Set properties for current chapter
576          */
577         /* Remeber current chapter */
578         p_dvd->i_chapter = p_area->i_part;
579         p_dvd->b_eoc = VLC_FALSE;
580
581         pgc_id = p_vts->vts_ptt_srpt->title[
582                     p_dvd->i_ttn-1].ptt[p_area->i_part-1].pgcn;
583         pgn = p_vts->vts_ptt_srpt->title[
584                     p_dvd->i_ttn-1].ptt[p_area->i_part-1].pgn;
585
586         p_pgc = p_vts->vts_pgcit->pgci_srp[pgc_id-1].pgc;
587         p_dvd->i_pack_len = 0;
588         p_dvd->i_next_cell = p_dvd->i_cur_cell = p_pgc->program_map[pgn-1] - 1;
589         DvdReadFindCell( p_dvd );
590
591         p_dvd->i_next_vobu = p_dvd->i_cur_block =
592             p_pgc->cell_playback[p_dvd->i_cur_cell].first_sector;
593
594         /*
595          * Angle management
596          */
597         p_dvd->i_angle_nb = p_vmg->tt_srpt->title[p_area->i_id-1].nr_of_angles;
598
599         if( p_dvd->i_angle > p_dvd->i_angle_nb )
600         {
601             p_dvd->i_angle = 1;
602         }
603
604         /*
605          * We've got enough info, time to open the title set data.
606          */
607         if( ! ( p_dvd->p_title = DVDOpenFile( p_dvd->p_dvdread,
608             p_vmg->tt_srpt->title[ p_area->i_id - 1 ].title_set_nr,
609             DVD_READ_TITLE_VOBS ) ) )
610         {
611             msg_Err( p_input, "cannot open title (VTS_%02d_1.VOB)",
612                      p_vmg->tt_srpt->title[p_area->i_id-1].title_set_nr );
613             ifoClose( p_vts );
614             ifoClose( p_vmg );
615             DVDClose( p_dvd->p_dvdread );
616             return VLC_EGENERIC;
617         }
618
619 //        IfoPrintTitle( p_dvd );
620
621         /*
622          * Destroy obsolete ES by reinitializing program 0
623          * and find all ES in title with ifo data
624          */
625         if( p_input->stream.pp_programs != NULL )
626         {
627             /* We don't use input_EndStream here since
628              * we keep area structures */
629
630             while( p_input->stream.i_es_number )
631             {
632                 input_DelES( p_input, p_input->stream.pp_es[0] );
633             }
634
635             while( p_input->stream.i_pgrm_number )
636             {
637                 input_DelProgram( p_input, p_input->stream.pp_programs[0] );
638             }
639
640             if( p_input->stream.pp_selected_es )
641             {
642                 free( p_input->stream.pp_selected_es );
643                 p_input->stream.pp_selected_es = NULL;
644             }
645             p_input->stream.i_selected_es_number = 0;
646         }
647
648         input_AddProgram( p_input, 1, sizeof( stream_ps_data_t ) );
649         p_input->stream.p_selected_program = p_input->stream.pp_programs[0];
650
651         for( i = 1 ; i < p_dvd->i_angle_nb ; i++ )
652         {
653             input_AddProgram( p_input, i+1, 0 );
654         }
655
656         DvdReadSetProgram( p_input,
657                            p_input->stream.pp_programs[p_dvd->i_angle-1] );
658
659         /* No PSM to read in DVD mode, we already have all information */
660         p_input->stream.p_selected_program->b_is_ok = VLC_TRUE;
661
662         p_es = NULL;
663
664         /* ES 0 -> video MPEG2 */
665 //        IfoPrintVideo( p_dvd );
666
667         p_es = input_AddES( p_input, NULL, 0xe0, 0 );
668         p_es->i_stream_id = 0xe0;
669         p_es->i_fourcc = VLC_FOURCC('m','p','g','v');
670         p_es->i_cat = VIDEO_ES;
671
672 #define audio_control \
673     p_dvd->p_vts_file->vts_pgcit->pgci_srp[pgc_id-1].pgc->audio_control[i-1]
674         /* Audio ES, in the order they appear in .ifo */
675         for( i = 1 ; i <= p_vts->vtsi_mat->nr_of_vts_audio_streams ; i++ )
676         {
677             int i_position = 0;
678             uint16_t i_id;
679
680 //            IfoPrintAudio( p_dvd, i );
681
682             /* audio channel is active if first byte is 0x80 */
683             if( audio_control & 0x8000 )
684             {
685                 i_audio_nb++;
686                 i_position = ( audio_control & 0x7F00 ) >> 8;
687
688             msg_Dbg( p_input, "audio position  %d", i_position );
689                 switch( p_vts->vtsi_mat->vts_audio_attr[i-1].audio_format )
690                 {
691                 case 0x00:              /* A52 */
692                     i_id = ( ( 0x80 + i_position ) << 8 ) | 0xbd;
693                     p_es = input_AddES( p_input, NULL, i_id, 0 );
694                     p_es->i_stream_id = 0xbd;
695                     p_es->i_fourcc = VLC_FOURCC('a','5','2','b');
696                     p_es->i_cat = AUDIO_ES;
697                     strcpy( p_es->psz_desc, DecodeLanguage(
698                         p_vts->vtsi_mat->vts_audio_attr[i-1].lang_code ) );
699                     strcat( p_es->psz_desc, " (A52)" );
700
701                     break;
702                 case 0x02:
703                 case 0x03:              /* MPEG audio */
704                     i_id = 0xc0 + i_position;
705                     p_es = input_AddES( p_input, NULL, i_id, 0 );
706                     p_es->i_stream_id = i_id;
707                     p_es->i_fourcc = VLC_FOURCC('m','p','g','a');
708                     p_es->i_cat = AUDIO_ES;
709                     strcpy( p_es->psz_desc, DecodeLanguage(
710                         p_vts->vtsi_mat->vts_audio_attr[i-1].lang_code ) );
711                     strcat( p_es->psz_desc, " (mpeg)" );
712
713                     break;
714                 case 0x04:              /* LPCM */
715
716                     i_id = ( ( 0xa0 + i_position ) << 8 ) | 0xbd;
717                     p_es = input_AddES( p_input, NULL, i_id, 0 );
718                     p_es->i_stream_id = i_id;
719                     p_es->i_fourcc = VLC_FOURCC('l','p','c','b');
720                     p_es->i_cat = AUDIO_ES;
721                     strcpy( p_es->psz_desc, DecodeLanguage(
722                         p_vts->vtsi_mat->vts_audio_attr[i-1].lang_code ) );
723                     strcat( p_es->psz_desc, " (lpcm)" );
724
725                     break;
726                 case 0x06:              /* DTS */
727                     i_id = ( ( 0x88 + i_position ) << 8 ) | 0xbd;
728                     msg_Err( p_input, "DTS audio not handled yet"
729                                       "(0x%x)", i_id );
730                     break;
731                 default:
732                     i_id = 0;
733                     msg_Err( p_input, "unknown audio type %.2x",
734                           p_vts->vtsi_mat->vts_audio_attr[i-1].audio_format );
735                 }
736             }
737         }
738 #undef audio_control
739 #define spu_control \
740     p_dvd->p_vts_file->vts_pgcit->pgci_srp[pgc_id-1].pgc->subp_control[i-1]
741
742         /* Sub Picture ES */
743
744         for( i = 1 ; i <= p_vts->vtsi_mat->nr_of_vts_subp_streams; i++ )
745         {
746             int i_position = 0;
747             uint16_t i_id;
748
749 //            IfoPrintSpu( p_dvd, i );
750             msg_Dbg( p_input, "spu %d 0x%02x", i, spu_control );
751
752             if( spu_control & 0x80000000 )
753             {
754                 i_spu_nb++;
755
756                 /*  there are several streams for one spu */
757                 if(  p_vts->vtsi_mat->vts_video_attr.display_aspect_ratio )
758                 {
759                     /* 16:9 */
760                     switch( p_vts->vtsi_mat->vts_video_attr.permitted_df )
761                     {
762                     case 1:
763                         i_position = spu_control & 0xff;
764                         break;
765                     case 2:
766                         i_position = ( spu_control >> 8 ) & 0xff;
767                         break;
768                     default:
769                         i_position = ( spu_control >> 16 ) & 0xff;
770                         break;
771                     }
772                 }
773                 else
774                 {
775                     /* 4:3 */
776                     i_position = ( spu_control >> 24 ) & 0x7F;
777                 }
778
779                 i_id = ( ( 0x20 + i_position ) << 8 ) | 0xbd;
780                 p_es = input_AddES( p_input, NULL, i_id, 0 );
781                 p_es->i_stream_id = 0xbd;
782                 p_es->i_fourcc = VLC_FOURCC('s','p','u','b');
783                 p_es->i_cat = SPU_ES;
784                 strcpy( p_es->psz_desc, DecodeLanguage(
785                     p_vts->vtsi_mat->vts_subp_attr[i-1].lang_code ) );
786             }
787         }
788 #undef spu_control
789
790         /* FIXME: hack to check that the demuxer is ready, and set
791          * the decoders */
792         if( p_input->p_demux )
793         {
794             DvdReadLauchDecoders( p_input );
795         }
796
797     } /* i_title >= 0 */
798     else
799     {
800         p_area = p_input->stream.p_selected_area;
801     }
802
803     /*
804      * Chapter selection
805      */
806
807     if( p_area->i_part != p_dvd->i_chapter )
808     {
809         if( ( p_area->i_part > 0 ) &&
810             ( p_area->i_part <= p_area->i_part_nb ))
811         {
812             p_dvd->i_ttn = p_vmg->tt_srpt->title[p_area->i_id-1].vts_ttn;
813             pgc_id = p_vts->vts_ptt_srpt->title[
814                         p_dvd->i_ttn-1].ptt[p_area->i_part-1].pgcn;
815             pgn = p_vts->vts_ptt_srpt->title[
816                         p_dvd->i_ttn-1].ptt[p_area->i_part-1].pgn;
817
818             p_pgc = p_vts->vts_pgcit->pgci_srp[ pgc_id - 1 ].pgc;
819
820             p_dvd->i_cur_cell = p_pgc->program_map[ pgn - 1 ] - 1;
821             p_dvd->i_chapter = p_area->i_part;
822             DvdReadFindCell( p_dvd );
823
824             p_dvd->i_pack_len = 0;
825             p_dvd->i_next_vobu = p_dvd->i_cur_block =
826                     p_pgc->cell_playback[p_dvd->i_cur_cell].first_sector;
827         }
828         else
829         {
830             p_area->i_part = p_dvd->i_chapter;
831         }
832     }
833 #undef p_vts
834 #undef p_vmg
835
836     /* warn interface that something has changed */
837     p_area->i_tell = LB2OFF( p_dvd->i_next_vobu ) - p_area->i_start;
838     p_input->stream.b_seekable = VLC_TRUE;
839     p_input->stream.b_changed = VLC_TRUE;
840
841     return VLC_SUCCESS;
842 }
843
844
845 /*****************************************************************************
846  * DvdReadRead: reads data packets into the netlist.
847  *****************************************************************************
848  * Returns -1 in case of error, 0 if everything went well, and 1 in case of
849  * EOF.
850  *****************************************************************************/
851 static int DvdReadRead( input_thread_t * p_input,
852                         byte_t * p_buffer, size_t i_count )
853 {
854     thread_dvd_data_t *     p_dvd;
855     byte_t *                p_buf;
856     unsigned int            i_blocks_once;
857     unsigned int            i_blocks;
858     int                     i_read;
859     int                     i_read_total;
860     vlc_bool_t              b_eot = VLC_FALSE;
861
862     p_dvd = (thread_dvd_data_t *)p_input->p_access_data;
863     p_buf = p_buffer;
864
865     /*
866      * Playback by cell in this pgc, starting at the cell for our chapter.
867      */
868     i_blocks = OFF2LB( i_count );
869     i_read_total = 0;
870     i_read = 0;
871
872     while( i_blocks )
873     {
874         /*
875          * End of pack, we select the following one
876          */
877         if( ! p_dvd->i_pack_len )
878         {
879             /*
880              * Read NAV packet.
881              */
882             if( ( i_read = DVDReadBlocks( p_dvd->p_title, p_dvd->i_next_vobu,
883                            1, p_buf ) ) != 1 )
884             {
885                 msg_Err( p_input, "read failed for block %d",
886                                   p_dvd->i_next_vobu );
887                 return -1;
888             }
889
890             /* basic check to be sure we don't have a empty title
891              * go to next title if so */
892             //assert( p_buffer[41] == 0xbf && p_buffer[1027] == 0xbf );
893
894             /*
895              * Parse the contained dsi packet.
896              */
897
898             DvdReadHandleDSI( p_dvd, p_buf );
899
900             /* End of File */
901             if( p_dvd->i_next_vobu >= p_dvd->i_end_block + 1 )
902             {
903                 return 1;
904             }
905
906             assert( p_dvd->i_pack_len < 1024 );
907             /* FIXME: Ugly kludge: we send the pack block to the input for it
908              * sometimes has a zero scr and restart the sync */
909             p_dvd->i_cur_block ++;
910             //p_dvd->i_pack_len++;
911
912             i_read_total++;
913             p_buf += DVD_VIDEO_LB_LEN;
914             i_blocks--;
915         }
916
917         /*
918          * Compute the number of blocks to read
919          */
920         i_blocks_once = __MIN( p_dvd->i_pack_len, i_blocks );
921         p_dvd->i_pack_len -= i_blocks_once;
922
923         /* Reads from DVD */
924         i_read = DVDReadBlocks( p_dvd->p_title, p_dvd->i_cur_block,
925                                 i_blocks_once, p_buf );
926         if( (unsigned int)i_read != i_blocks_once )
927         {
928             msg_Err( p_input, "read failed for %d/%d blocks at 0x%02x",
929                               i_read, i_blocks_once, p_dvd->i_cur_block );
930             return -1;
931         }
932
933         i_blocks -= i_read;
934         i_read_total += i_read;
935         p_dvd->i_cur_block += i_read;
936         p_buf += LB2OFF( i_read );
937
938     }
939 /*
940     msg_Dbg( p_input, "i_blocks: %d len: %d current: 0x%02x", i_read, p_dvd->i_pack_len, p_dvd->i_cur_block );
941 */
942
943     vlc_mutex_lock( &p_input->stream.stream_lock );
944
945     if( p_dvd->b_eoc )
946     {
947         /* We modify i_part only at end of chapter not to erase
948          * some modification from the interface */
949         p_input->stream.p_selected_area->i_part = p_dvd->i_chapter;
950         p_dvd->b_eoc = VLC_FALSE;
951     }
952
953     if( ( LB2OFF( p_dvd->i_cur_block )
954           - p_input->stream.p_selected_area->i_start )
955             >= p_input->stream.p_selected_area->i_size || b_eot )
956     {
957         if( ( p_input->stream.p_selected_area->i_id + 1 ) >=
958                         p_input->stream.i_area_nb )
959         {
960             /* EOF */
961             vlc_mutex_unlock( &p_input->stream.stream_lock );
962             return 1;
963         }
964
965         /* EOT */
966         msg_Dbg( p_input, "new title" );
967         DvdReadSetArea( p_input, p_input->stream.pp_areas[
968                         p_input->stream.p_selected_area->i_id+1] );
969         vlc_mutex_unlock( &p_input->stream.stream_lock );
970         return 0;
971     }
972
973     vlc_mutex_unlock( &p_input->stream.stream_lock );
974
975     return LB2OFF( i_read_total );
976 }
977 #undef p_pgc
978
979 /*****************************************************************************
980  * DvdReadSeek : Goes to a given position on the stream.
981  *****************************************************************************
982  * This one is used by the input and translate chronological position from
983  * input to logical position on the device.
984  * The lock should be taken before calling this function.
985  *****************************************************************************/
986 static void DvdReadSeek( input_thread_t * p_input, off_t i_off )
987 {
988     thread_dvd_data_t *     p_dvd;
989     unsigned int            i_lb;
990     unsigned int            i_tmp;
991     unsigned int            i_chapter = 0;
992     unsigned int            i_cell = 0;
993     unsigned int            i_vobu = 0;
994     unsigned int            i_sub_cell = 0;
995
996     vlc_mutex_lock( &p_input->stream.stream_lock );
997     i_off += p_input->stream.p_selected_area->i_start;
998     vlc_mutex_unlock( &p_input->stream.stream_lock );
999
1000     i_lb = OFF2LB( i_off );
1001     p_dvd = ( thread_dvd_data_t * )p_input->p_access_data;
1002
1003     /* find cell */
1004     while( p_dvd->p_cur_pgc->cell_playback[i_cell].last_sector < i_lb )
1005     {
1006         i_cell++;
1007     }
1008
1009     /* find chapter */
1010     do
1011     {
1012         pgc_t *     p_pgc;
1013         int         pgc_id, pgn;
1014
1015         i_chapter++;
1016         pgc_id = p_dvd->p_vts_file->vts_ptt_srpt->title[
1017                     p_dvd->i_ttn-1].ptt[i_chapter-1].pgcn;
1018         pgn = p_dvd->p_vts_file->vts_ptt_srpt->title[
1019                     p_dvd->i_ttn-1].ptt[i_chapter-1].pgn;
1020
1021         p_pgc = p_dvd->p_vts_file->vts_pgcit->pgci_srp[pgc_id-1].pgc;
1022         i_tmp = p_pgc->program_map[pgn-1];
1023
1024     } while( i_tmp <= i_cell );
1025
1026     /* find vobu */
1027     while( p_dvd->p_vts_file->vts_vobu_admap->vobu_start_sectors[i_vobu]
1028             <= i_lb )
1029     {
1030         i_vobu++;
1031     }
1032
1033     /* find sub_cell */
1034     while( p_dvd->p_vts_file->vts_c_adt->cell_adr_table[i_sub_cell].start_sector <
1035             p_dvd->p_vts_file->vts_vobu_admap->vobu_start_sectors[i_vobu-1] )
1036     {
1037         i_sub_cell++;
1038     }
1039
1040 /*
1041     msg_Dbg( p_input, "cell %d i_sub_cell %d chapter %d vobu %d cell_sector %d vobu_sector %d sub_cell_sector %d",
1042             i_cell, i_sub_cell,i_chapter, i_vobu,
1043             p_dvd->p_cur_pgc->cell_playback[i_cell].first_sector,
1044             p_dvd->p_vts_file->vts_vobu_admap->vobu_start_sectors[i_vobu],
1045             p_dvd->p_vts_file->vts_c_adt->cell_adr_table[i_sub_cell-1].start_sector);
1046 */
1047     p_dvd->i_cur_block = i_lb;
1048     p_dvd->i_next_vobu =
1049         p_dvd->p_vts_file->vts_vobu_admap->vobu_start_sectors[i_vobu];
1050     p_dvd->i_pack_len = p_dvd->i_next_vobu - i_lb;
1051     p_dvd->i_cur_cell = i_cell;
1052     p_dvd->i_chapter = i_chapter;
1053     DvdReadFindCell( p_dvd );
1054
1055     vlc_mutex_lock( &p_input->stream.stream_lock );
1056     p_input->stream.p_selected_area->i_tell =
1057         LB2OFF ( p_dvd->i_cur_block )
1058          - p_input->stream.p_selected_area->i_start;
1059     p_input->stream.p_selected_area->i_part = p_dvd->i_chapter;
1060     vlc_mutex_unlock( &p_input->stream.stream_lock );
1061
1062     return;
1063 }
1064
1065 /*****************************************************************************
1066  * DvdReadHandleDSI
1067  *****************************************************************************/
1068 static void DvdReadHandleDSI( thread_dvd_data_t * p_dvd, uint8_t * p_data )
1069 {
1070     navRead_DSI( &(p_dvd->dsi_pack), &(p_data[ DSI_START_BYTE ]) );
1071
1072     /*
1073      * Determine where we go next.  These values are the ones we mostly
1074      * care about.
1075      */
1076     p_dvd->i_cur_block = p_dvd->dsi_pack.dsi_gi.nv_pck_lbn;
1077
1078     /*
1079      * If we're not at the end of this cell, we can determine the next
1080      * VOBU to display using the VOBU_SRI information section of the
1081      * DSI.  Using this value correctly follows the current angle,
1082      * avoiding the doubled scenes in The Matrix, and makes our life
1083      * really happy.
1084      */
1085     if( p_dvd->dsi_pack.vobu_sri.next_vobu != SRI_END_OF_CELL )
1086     {
1087 #if 1
1088         switch( ( p_dvd->dsi_pack.sml_pbi.category & 0xf000 ) >> 12 )
1089         {
1090             case 0x4:
1091                 /* interleaved unit with no angle */
1092                 if( p_dvd->dsi_pack.sml_pbi.ilvu_sa != 0 )
1093                 {
1094                     p_dvd->i_next_vobu = p_dvd->i_cur_block +
1095                         p_dvd->dsi_pack.sml_pbi.ilvu_sa;
1096                     p_dvd->i_pack_len = p_dvd->dsi_pack.sml_pbi.ilvu_ea;
1097                 }
1098                 else
1099                 {
1100                     p_dvd->i_next_vobu = p_dvd->i_cur_block +
1101                         p_dvd->dsi_pack.dsi_gi.vobu_ea + 1;
1102                     p_dvd->i_pack_len = p_dvd->dsi_pack.dsi_gi.vobu_ea;
1103                 }
1104                 break;
1105             case 0x5:
1106                 /* vobu is end of ilvu */
1107                 if( p_dvd->dsi_pack.sml_agli.data[p_dvd->i_angle-1].address )
1108                 {
1109                     p_dvd->i_next_vobu = p_dvd->i_cur_block +
1110                         p_dvd->dsi_pack.sml_agli.data[p_dvd->i_angle-1].address;
1111                     p_dvd->i_pack_len = p_dvd->dsi_pack.sml_pbi.ilvu_ea;
1112
1113                     break;
1114                 }
1115             case 0x6:
1116                 /* vobu is beginning of ilvu */
1117             case 0x9:
1118                 /* next scr is 0 */
1119             case 0xa:
1120                 /* entering interleaved section */
1121             case 0x8:
1122                 /* non interleaved cells in interleaved section */
1123             default:
1124                 p_dvd->i_next_vobu = p_dvd->i_cur_block +
1125                     ( p_dvd->dsi_pack.vobu_sri.next_vobu & 0x7fffffff );
1126                 p_dvd->i_pack_len = p_dvd->dsi_pack.dsi_gi.vobu_ea;
1127                 break;
1128         }
1129 #else
1130         p_dvd->i_next_vobu = p_dvd->i_cur_block +
1131             ( p_dvd->dsi_pack.vobu_sri.next_vobu & 0x7fffffff );
1132         p_dvd->i_pack_len = p_dvd->dsi_pack.dsi_gi.vobu_ea;
1133 #endif
1134     }
1135     else
1136     {
1137         p_dvd->i_cur_cell = p_dvd->i_next_cell;
1138         DvdReadFindCell( p_dvd );
1139
1140         p_dvd->i_pack_len = p_dvd->dsi_pack.dsi_gi.vobu_ea;
1141         p_dvd->i_next_vobu =
1142             p_dvd->p_cur_pgc->cell_playback[p_dvd->i_cur_cell].first_sector;
1143     }
1144
1145 #if 0
1146     msg_Dbg( p_input, 12, "scr %d lbn 0x%02x vobu_ea %d vob_id %d c_id %d",
1147              p_dvd->dsi_pack.dsi_gi.nv_pck_scr,
1148              p_dvd->dsi_pack.dsi_gi.nv_pck_lbn,
1149              p_dvd->dsi_pack.dsi_gi.vobu_ea,
1150              p_dvd->dsi_pack.dsi_gi.vobu_vob_idn,
1151              p_dvd->dsi_pack.dsi_gi.vobu_c_idn );
1152
1153     msg_Dbg( p_input, 12, "cat 0x%02x ilvu_ea %d ilvu_sa %d size %d",
1154              p_dvd->dsi_pack.sml_pbi.category,
1155              p_dvd->dsi_pack.sml_pbi.ilvu_ea,
1156              p_dvd->dsi_pack.sml_pbi.ilvu_sa,
1157              p_dvd->dsi_pack.sml_pbi.size );
1158
1159     msg_Dbg( p_input, 12, "next_vobu %d next_ilvu1 %d next_ilvu2 %d",
1160              p_dvd->dsi_pack.vobu_sri.next_vobu & 0x7fffffff,
1161              p_dvd->dsi_pack.sml_agli.data[ p_dvd->i_angle - 1 ].address,
1162              p_dvd->dsi_pack.sml_agli.data[ p_dvd->i_angle ].address);
1163 #endif
1164 }
1165
1166 /*****************************************************************************
1167  * DvdReadFindCell
1168  *****************************************************************************/
1169 static void DvdReadFindCell( thread_dvd_data_t * p_dvd )
1170 {
1171     int         pgc_id, pgn;
1172     int         i = 0;
1173     pgc_t *     p_pgc;
1174 #define cell p_dvd->p_cur_pgc->cell_playback
1175     if( cell[p_dvd->i_cur_cell].block_type == BLOCK_TYPE_ANGLE_BLOCK )
1176     {
1177 #if 0
1178         p_dvd->i_next_cell = p_dvd->i_cur_cell + p_dvd->i_angle_nb;
1179         p_dvd->i_cur_cell += p_dvd->i_angle - 1;
1180 #else
1181         p_dvd->i_cur_cell += p_dvd->i_angle - 1;
1182
1183         while( cell[p_dvd->i_cur_cell+i].block_mode != BLOCK_MODE_LAST_CELL )
1184         {
1185             i++;
1186         }
1187         p_dvd->i_next_cell = p_dvd->i_cur_cell + i + 1;
1188 #endif
1189     }
1190     else
1191     {
1192         p_dvd->i_next_cell = p_dvd->i_cur_cell + 1;
1193     }
1194 #undef cell
1195     pgc_id = p_dvd->p_vts_file->vts_ptt_srpt->title[
1196                 p_dvd->i_ttn-1].ptt[p_dvd->i_chapter-1].pgcn;
1197     pgn = p_dvd->p_vts_file->vts_ptt_srpt->title[
1198                 p_dvd->i_ttn-1].ptt[p_dvd->i_chapter-1].pgn;
1199     p_pgc = p_dvd->p_vts_file->vts_pgcit->pgci_srp[pgc_id-1].pgc;
1200
1201     if( p_pgc->program_map[pgn-1] <= p_dvd->i_cur_cell )
1202     {
1203         p_dvd->i_chapter++;
1204         p_dvd->b_eoc = VLC_TRUE;
1205     }
1206 }
1207
1208 /*****************************************************************************
1209  * DvdReadLaunchDecoders
1210  *****************************************************************************/
1211 static void DvdReadLauchDecoders( input_thread_t * p_input )
1212 {
1213     thread_dvd_data_t * p_dvd = (thread_dvd_data_t*)(p_input->p_access_data);
1214     int i_audio, i_spu;
1215
1216     input_SelectES( p_input, p_input->stream.pp_es[0] );
1217
1218     /* For audio: first one if none or a not existing one specified */
1219     i_audio = config_GetInt( p_input, "audio-channel" );
1220     if( i_audio < 0 /*|| i_audio > i_audio_nb*/ )
1221     {
1222         config_PutInt( p_input, "audio-channel", 1 );
1223         i_audio = 1;
1224     }
1225     if( i_audio > 0/* && i_audio_nb > 0*/ )
1226     {
1227         if( config_GetInt( p_input, "audio-type" ) == REQUESTED_A52 )
1228         {
1229             int     i_a52 = i_audio;
1230             while( ( p_input->stream.pp_es[i_a52]->i_fourcc !=
1231                    VLC_FOURCC('a','5','2','b') ) && ( i_a52 <=
1232                    p_dvd->p_vts_file->vtsi_mat->nr_of_vts_audio_streams ) )
1233             {
1234                 i_a52++;
1235             }
1236             if( p_input->stream.pp_es[i_a52]->i_fourcc
1237                  == VLC_FOURCC('a','5','2','b') )
1238             {
1239                 input_SelectES( p_input, p_input->stream.pp_es[i_a52] );
1240             }
1241         }
1242         else
1243         {
1244             input_SelectES( p_input, p_input->stream.pp_es[i_audio] );
1245         }
1246     }
1247
1248     /* for spu, default is none */
1249     i_spu = config_GetInt( p_input, "spu-channel" );
1250     if( i_spu < 0 /*|| i_spu > i_spu_nb*/ )
1251     {
1252         config_PutInt( p_input, "spu-channel", 0 );
1253         i_spu = 0;
1254     }
1255     if( i_spu > 0 /*&& i_spu_nb > 0*/ )
1256     {
1257         i_spu += p_dvd->p_vts_file->vtsi_mat->nr_of_vts_audio_streams;
1258         input_SelectES( p_input, p_input->stream.pp_es[i_spu] );
1259     }
1260 }