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[vlc] / src / input / demux.c
1 /*****************************************************************************
2  * demux.c
3  *****************************************************************************
4  * Copyright (C) 1999-2004 the VideoLAN team
5  * $Id$
6  *
7  * Author: Laurent Aimar <fenrir@via.ecp.fr>
8  *
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.
13  *
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.
18  *
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  *****************************************************************************/
23
24 #include <stdlib.h>
25 #include <vlc/vlc.h>
26 #include <vlc/input.h>
27
28 #include "input_internal.h"
29
30 static void SkipID3Tag( demux_t * );
31
32 /*****************************************************************************
33  * demux2_New:
34  *  if s is NULL then load a access_demux
35  *****************************************************************************/
36 demux_t *__demux2_New( vlc_object_t *p_obj,
37                        const char *psz_access, const char *psz_demux,
38                        const char *psz_path,
39                        stream_t *s, es_out_t *out, vlc_bool_t b_quick )
40 {
41     demux_t *p_demux = vlc_object_create( p_obj, VLC_OBJECT_DEMUX );
42     const char *psz_module;
43
44     if( p_demux == NULL ) return NULL;
45
46     /* Parse URL */
47     p_demux->psz_access = strdup( psz_access );
48     p_demux->psz_demux  = strdup( psz_demux );
49     p_demux->psz_path   = strdup( psz_path );
50
51     /* Take into account "demux" to be able to do :demux=dump */
52     if( *p_demux->psz_demux == '\0' )
53     {
54         free( p_demux->psz_demux );
55         p_demux->psz_demux = var_GetString( p_obj, "demux" );
56     }
57
58     if( !b_quick )
59     {
60         msg_Dbg( p_obj, "creating demux: access='%s' demux='%s' path='%s'",
61                  p_demux->psz_access, p_demux->psz_demux, p_demux->psz_path );
62     }
63
64     p_demux->s          = s;
65     p_demux->out        = out;
66
67     p_demux->pf_demux   = NULL;
68     p_demux->pf_control = NULL;
69     p_demux->p_sys      = NULL;
70     p_demux->info.i_update = 0;
71     p_demux->info.i_title  = 0;
72     p_demux->info.i_seekpoint = 0;
73
74     if( s ) psz_module = p_demux->psz_demux;
75     else psz_module = p_demux->psz_access;
76
77     if( s && *psz_module == '\0' && strrchr( p_demux->psz_path, '.' ) )
78     {
79        /* XXX: add only file without any problem here and with strong detection.
80         *  - no .mp3, .a52, ... (aac is added as it works only by file ext
81         *     anyway
82         *  - wav can't be added 'cause of a52 and dts in them as raw audio
83          */
84          static struct { const char *ext; const char *demux; } exttodemux[] =
85          {
86             { "aac",  "aac" },
87             { "aiff", "aiff" },
88             { "asf",  "asf" }, { "wmv",  "asf" }, { "wma",  "asf" },
89             { "avi",  "avi" },
90             { "au",   "au" },
91             { "flac", "flac" },
92             { "dv",   "dv" },
93             { "m3u",  "playlist" },
94             { "mkv",  "mkv" }, { "mka",  "mkv" }, { "mks",  "mkv" },
95             { "mp4",  "mp4" }, { "m4a",  "mp4" }, { "mov",  "mp4" }, { "moov", "mp4" },
96             { "mod",  "mod" }, { "xm",   "mod" },
97             { "nsv",  "nsv" },
98             { "ogg",  "ogg" }, { "ogm",  "ogg" },
99             { "pva",  "pva" },
100             { "rm",   "rm" },
101             { "m4v",  "m4v" },
102             { "h264",  "h264" },
103             { NULL,  NULL },
104         };
105         /* Here, we don't mind if it does not work, it must be quick */
106         static struct { const char *ext; const char *demux; } exttodemux_quick[] =
107         {
108             { "mp3", "mpga" },
109             { "ogg", "ogg" },
110             { "wma", "asf" },
111             { NULL, NULL }
112         };
113
114         const char *psz_ext = strrchr( p_demux->psz_path, '.' ) + 1;
115         int  i;
116
117         if( !b_quick )
118         {
119             for( i = 0; exttodemux[i].ext != NULL; i++ )
120             {
121                 if( !strcasecmp( psz_ext, exttodemux[i].ext ) )
122                 {
123                     psz_module = exttodemux[i].demux;
124                     break;
125                 }
126             }
127         }
128         else
129         {
130             for( i = 0; exttodemux_quick[i].ext != NULL; i++ )
131             {
132                 if( !strcasecmp( psz_ext, exttodemux_quick[i].ext ) )
133                 {
134                     psz_module = exttodemux_quick[i].demux;
135                     break;
136                 }
137             }
138
139         }
140     }
141
142     /* Before module_Need (for var_Create...) */
143     vlc_object_attach( p_demux, p_obj );
144
145     if( s )
146     {
147         /* ID3 tags will mess-up demuxer probing so we skip it here.
148          * ID3 parsers will called later on in the demuxer to access the
149          * skipped info. */
150         SkipID3Tag( p_demux );
151
152         p_demux->p_module =
153             module_Need( p_demux, "demux2", psz_module,
154                          !strcmp( psz_module, p_demux->psz_demux ) ?
155                          VLC_TRUE : VLC_FALSE );
156     }
157     else
158     {
159         p_demux->p_module =
160             module_Need( p_demux, "access_demux", psz_module,
161                          !strcmp( psz_module, p_demux->psz_access ) ?
162                          VLC_TRUE : VLC_FALSE );
163     }
164
165     if( p_demux->p_module == NULL )
166     {
167         vlc_object_detach( p_demux );
168         free( p_demux->psz_path );
169         free( p_demux->psz_demux );
170         free( p_demux->psz_access );
171         vlc_object_destroy( p_demux );
172         return NULL;
173     }
174
175     return p_demux;
176 }
177
178 /*****************************************************************************
179  * demux2_Delete:
180  *****************************************************************************/
181 void demux2_Delete( demux_t *p_demux )
182 {
183     module_Unneed( p_demux, p_demux->p_module );
184     vlc_object_detach( p_demux );
185
186     free( p_demux->psz_path );
187     free( p_demux->psz_demux );
188     free( p_demux->psz_access );
189
190     vlc_object_destroy( p_demux );
191 }
192
193 /*****************************************************************************
194  * demux2_vaControlHelper:
195  *****************************************************************************/
196 int demux2_vaControlHelper( stream_t *s,
197                             int64_t i_start, int64_t i_end,
198                             int i_bitrate, int i_align,
199                             int i_query, va_list args )
200 {
201     int64_t i_tell;
202     double  f, *pf;
203     int64_t i64, *pi64;
204
205     if( i_end < 0 )    i_end   = stream_Size( s );
206     if( i_start < 0 )  i_start = 0;
207     if( i_align <= 0 ) i_align = 1;
208     i_tell = stream_Tell( s );
209
210     switch( i_query )
211     {
212         case DEMUX_GET_LENGTH:
213             pi64 = (int64_t*)va_arg( args, int64_t * );
214             if( i_bitrate > 0 && i_end > i_start )
215             {
216                 *pi64 = I64C(8000000) * (i_end - i_start) / i_bitrate;
217                 return VLC_SUCCESS;
218             }
219             return VLC_EGENERIC;
220
221         case DEMUX_GET_TIME:
222             pi64 = (int64_t*)va_arg( args, int64_t * );
223             if( i_bitrate > 0 && i_end > i_start )
224             {
225                 *pi64 = I64C(8000000) * (i_tell - i_start) / i_bitrate;
226                 return VLC_SUCCESS;
227             }
228             return VLC_EGENERIC;
229
230         case DEMUX_GET_POSITION:
231             pf = (double*)va_arg( args, double * );
232             if( i_start < i_end )
233             {
234                 *pf = (double)( i_tell - i_start ) /
235                       (double)( i_end  - i_start );
236                 return VLC_SUCCESS;
237             }
238             return VLC_EGENERIC;
239
240
241         case DEMUX_SET_POSITION:
242             f = (double)va_arg( args, double );
243             if( i_start < i_end && f >= 0.0 && f <= 1.0 )
244             {
245                 int64_t i_block = (f * ( i_end - i_start )) / i_align;
246
247                 if( stream_Seek( s, i_start + i_block * i_align ) )
248                 {
249                     return VLC_EGENERIC;
250                 }
251                 return VLC_SUCCESS;
252             }
253             return VLC_EGENERIC;
254
255         case DEMUX_SET_TIME:
256             i64 = (int64_t)va_arg( args, int64_t );
257             if( i_bitrate > 0 && i64 >= 0 )
258             {
259                 int64_t i_block = i64 * i_bitrate / I64C(8000000) / i_align;
260                 if( stream_Seek( s, i_start + i_block * i_align ) )
261                 {
262                     return VLC_EGENERIC;
263                 }
264                 return VLC_SUCCESS;
265             }
266             return VLC_EGENERIC;
267
268         case DEMUX_GET_FPS:
269         case DEMUX_GET_META:
270         case DEMUX_SET_NEXT_DEMUX_TIME:
271         case DEMUX_GET_TITLE_INFO:
272         case DEMUX_SET_GROUP:
273             return VLC_EGENERIC;
274
275         default:
276             msg_Err( s, "unknown query in demux_vaControlDefault" );
277             return VLC_EGENERIC;
278     }
279 }
280
281 /****************************************************************************
282  * stream_Demux*: create a demuxer for an outpout stream (allow demuxer chain)
283  ****************************************************************************/
284 typedef struct
285 {
286     /* Data buffer */
287     block_fifo_t *p_fifo;
288     block_t      *p_block;
289
290     int64_t     i_pos;
291
292     /* Demuxer */
293     char        *psz_name;
294     es_out_t    *out;
295     demux_t     *p_demux;
296
297 } d_stream_sys_t;
298
299 static int DStreamRead   ( stream_t *, void *p_read, int i_read );
300 static int DStreamPeek   ( stream_t *, uint8_t **pp_peek, int i_peek );
301 static int DStreamControl( stream_t *, int i_query, va_list );
302 static int DStreamThread ( stream_t * );
303
304
305 stream_t *__stream_DemuxNew( vlc_object_t *p_obj, const char *psz_demux,
306                              es_out_t *out )
307 {
308     /* We create a stream reader, and launch a thread */
309     stream_t       *s;
310     d_stream_sys_t *p_sys;
311
312     if( psz_demux == NULL || *psz_demux == '\0' ) return NULL;
313
314     s = vlc_object_create( p_obj, VLC_OBJECT_STREAM );
315     s->pf_block  = NULL;
316     s->pf_read   = DStreamRead;
317     s->pf_peek   = DStreamPeek;
318     s->pf_control= DStreamControl;
319
320     s->i_char_width = 1;
321     s->b_little_endian = VLC_FALSE;
322
323     s->p_sys = malloc( sizeof( d_stream_sys_t) );
324     p_sys = (d_stream_sys_t*)s->p_sys;
325
326     p_sys->i_pos = 0;
327     p_sys->out = out;
328     p_sys->p_demux = NULL;
329     p_sys->p_block = NULL;
330     p_sys->psz_name = strdup( psz_demux );
331
332     /* decoder fifo */
333     if( ( p_sys->p_fifo = block_FifoNew( s ) ) == NULL )
334     {
335         msg_Err( s, "out of memory" );
336         vlc_object_destroy( s );
337         free( p_sys );
338         return NULL;
339     }
340
341     if( vlc_thread_create( s, "stream out", DStreamThread,
342                            VLC_THREAD_PRIORITY_INPUT, VLC_FALSE ) )
343     {
344         vlc_object_destroy( s );
345         free( p_sys );
346         return NULL;
347     }
348
349     return s;
350 }
351
352 void stream_DemuxSend( stream_t *s, block_t *p_block )
353 {
354     d_stream_sys_t *p_sys = (d_stream_sys_t*)s->p_sys;
355     if( p_block ) block_FifoPut( p_sys->p_fifo, p_block );
356 }
357
358 void stream_DemuxDelete( stream_t *s )
359 {
360     d_stream_sys_t *p_sys = (d_stream_sys_t*)s->p_sys;
361     block_t *p_empty;
362
363     s->b_die = VLC_TRUE;
364     if( p_sys->p_demux ) p_sys->p_demux->b_die = VLC_TRUE;
365     p_empty = block_New( s, 1 ); p_empty->i_buffer = 0;
366     block_FifoPut( p_sys->p_fifo, p_empty );
367     vlc_thread_join( s );
368
369     if( p_sys->p_demux ) demux2_Delete( p_sys->p_demux );
370     if( p_sys->p_block ) block_Release( p_sys->p_block );
371
372     block_FifoRelease( p_sys->p_fifo );
373     free( p_sys->psz_name );
374     free( p_sys );
375
376     vlc_object_destroy( s );
377 }
378
379
380 static int DStreamRead( stream_t *s, void *p_read, int i_read )
381 {
382     d_stream_sys_t *p_sys = (d_stream_sys_t*)s->p_sys;
383     uint8_t *p_out = p_read;
384     int i_out = 0;
385
386     //msg_Dbg( s, "DStreamRead: wanted %d bytes", i_read );
387
388     while( !s->b_die && !s->b_error && i_read )
389     {
390         block_t *p_block = p_sys->p_block;
391         int i_copy;
392
393         if( !p_block )
394         {
395             p_block = block_FifoGet( p_sys->p_fifo );
396             if( !p_block ) s->b_error = 1;
397             p_sys->p_block = p_block;
398         }
399
400         if( p_block && i_read )
401         {
402             i_copy = __MIN( i_read, p_block->i_buffer );
403             if( p_out && i_copy ) memcpy( p_out, p_block->p_buffer, i_copy );
404             i_read -= i_copy;
405             i_out += i_copy;
406             p_block->i_buffer -= i_copy;
407             p_block->p_buffer += i_copy;
408
409             if( !p_block->i_buffer )
410             {
411                 block_Release( p_block );
412                 p_sys->p_block = NULL;
413             }
414         }
415     }
416
417     p_sys->i_pos += i_out;
418     return i_out;
419 }
420
421 static int DStreamPeek( stream_t *s, uint8_t **pp_peek, int i_peek )
422 {
423     d_stream_sys_t *p_sys = (d_stream_sys_t*)s->p_sys;
424     block_t **pp_block = &p_sys->p_block;
425     int i_out = 0;
426     *pp_peek = 0;
427
428     //msg_Dbg( s, "DStreamPeek: wanted %d bytes", i_peek );
429
430     while( !s->b_die && !s->b_error && i_peek )
431     {
432         int i_copy;
433
434         if( !*pp_block )
435         {
436             *pp_block = block_FifoGet( p_sys->p_fifo );
437             if( !*pp_block ) s->b_error = 1;
438         }
439
440         if( *pp_block && i_peek )
441         {
442             i_copy = __MIN( i_peek, (*pp_block)->i_buffer );
443             i_peek -= i_copy;
444             i_out += i_copy;
445
446             if( i_peek ) pp_block = &(*pp_block)->p_next;
447         }
448     }
449
450     if( p_sys->p_block )
451     {
452         p_sys->p_block = block_ChainGather( p_sys->p_block );
453         *pp_peek = p_sys->p_block->p_buffer;
454     }
455
456     return i_out;
457 }
458
459 static int DStreamControl( stream_t *s, int i_query, va_list args )
460 {
461     d_stream_sys_t *p_sys = (d_stream_sys_t*)s->p_sys;
462     int64_t    *p_i64;
463     vlc_bool_t *p_b;
464     int        *p_int;
465
466     switch( i_query )
467     {
468         case STREAM_GET_SIZE:
469             p_i64 = (int64_t*) va_arg( args, int64_t * );
470             *p_i64 = 0;
471             return VLC_SUCCESS;
472
473         case STREAM_CAN_SEEK:
474             p_b = (vlc_bool_t*) va_arg( args, vlc_bool_t * );
475             *p_b = VLC_FALSE;
476             return VLC_SUCCESS;
477
478         case STREAM_CAN_FASTSEEK:
479             p_b = (vlc_bool_t*) va_arg( args, vlc_bool_t * );
480             *p_b = VLC_FALSE;
481             return VLC_SUCCESS;
482
483         case STREAM_GET_POSITION:
484             p_i64 = (int64_t*) va_arg( args, int64_t * );
485             *p_i64 = p_sys->i_pos;
486             return VLC_SUCCESS;
487
488         case STREAM_SET_POSITION:
489         {
490             int64_t i64 = (int64_t)va_arg( args, int64_t );
491             int i_skip;
492             if( i64 < p_sys->i_pos ) return VLC_EGENERIC;
493             i_skip = i64 - p_sys->i_pos;
494
495             while( i_skip > 0 )
496             {
497                 int i_read = DStreamRead( s, NULL, i_skip );
498                 if( i_read <= 0 ) return VLC_EGENERIC;
499                 i_skip -= i_read;
500             }
501             return VLC_SUCCESS;
502         }
503
504         case STREAM_GET_MTU:
505             p_int = (int*) va_arg( args, int * );
506             *p_int = 0;
507             return VLC_SUCCESS;
508
509         case STREAM_CONTROL_ACCESS:
510             return VLC_EGENERIC;
511
512         default:
513             msg_Err( s, "invalid DStreamControl query=0x%x", i_query );
514             return VLC_EGENERIC;
515     }
516 }
517
518 static int DStreamThread( stream_t *s )
519 {
520     d_stream_sys_t *p_sys = (d_stream_sys_t*)s->p_sys;
521     demux_t *p_demux;
522
523     /* Create the demuxer */
524     if( !(p_demux = demux2_New( s, "", p_sys->psz_name, "", s, p_sys->out,
525                                VLC_FALSE )) )
526     {
527         return VLC_EGENERIC;
528     }
529
530     p_sys->p_demux = p_demux;
531
532     /* Main loop */
533     while( !s->b_die && !p_demux->b_die )
534     {
535         if( p_demux->pf_demux( p_demux ) <= 0 ) break;
536     }
537
538     p_demux->b_die = VLC_TRUE;
539     return VLC_SUCCESS;
540 }
541
542 /****************************************************************************
543  * Utility functions
544  ****************************************************************************/
545 static void SkipID3Tag( demux_t *p_demux )
546 {
547     uint8_t *p_peek;
548     uint8_t version, revision;
549     int i_size;
550     int b_footer;
551
552     if( !p_demux->s ) return;
553
554     /* Get 10 byte id3 header */
555     if( stream_Peek( p_demux->s, &p_peek, 10 ) < 10 ) return;
556
557     if( p_peek[0] != 'I' || p_peek[1] != 'D' || p_peek[2] != '3' ) return;
558
559     version = p_peek[3];
560     revision = p_peek[4];
561     b_footer = p_peek[5] & 0x10;
562     i_size = (p_peek[6]<<21) + (p_peek[7]<<14) + (p_peek[8]<<7) + p_peek[9];
563
564     if( b_footer ) i_size += 10;
565     i_size += 10;
566
567     /* Skip the entire tag */
568     stream_Read( p_demux->s, NULL, i_size );
569
570     msg_Dbg( p_demux, "ID3v2.%d revision %d tag found, skipping %d bytes",
571              version, revision, i_size );
572
573     return;
574 }