git.sesse.net Git - vlc/blob - src/input/demux.c

   1 /*****************************************************************************
   2  * demux.c
   3  *****************************************************************************
   4  * Copyright (C) 1999-2004 VideoLAN
   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., 59 Temple Place - Suite 330, Boston, MA  02111, 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 /*****************************************************************************
  31  * demux2_New:
  32  *  if s is NULL then load a access_demux
  33  *****************************************************************************/
  34 demux_t *__demux2_New( vlc_object_t *p_obj,
  35                        char *psz_access, char *psz_demux, char *psz_path,
  36                        stream_t *s, es_out_t *out )
  37 {
  38     demux_t *p_demux = vlc_object_create( p_obj, VLC_OBJECT_DEMUX );
  39     char *psz_module;
  40
  41     if( p_demux == NULL )
  42     {
  43         return NULL;
  44     }
  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     msg_Dbg( p_obj, "demux2_New: access='%s' demux='%s' path='%s'",
  52              p_demux->psz_access, p_demux->psz_demux, p_demux->psz_path );
  53
  54     p_demux->s          = s;
  55     p_demux->out        = out;
  56
  57     p_demux->pf_demux   = NULL;
  58     p_demux->pf_control = NULL;
  59     p_demux->p_sys      = NULL;
  60     p_demux->info.i_update = 0;
  61     p_demux->info.i_title  = 0;
  62     p_demux->info.i_seekpoint = 0;
  63
  64     if( s )
  65         psz_module = p_demux->psz_demux;
  66     else
  67         psz_module = p_demux->psz_access;
  68
  69     if( s && *psz_module == '\0' && strrchr( p_demux->psz_path, '.' ) )
  70     {
  71         /* XXX: add only file without any problem here and with strong detection.
  72          *  - no .mp3, .a52, ... (aac is added as it works only by file ext anyway
  73          *  - wav can't be added 'cause of a52 and dts in them as raw audio
  74          */
  75         static struct { char *ext; char *demux; } exttodemux[] =
  76         {
  77             { "aac",  "aac" },
  78             { "aiff", "aiff" },
  79             { "asf",  "asf" }, { "wmv",  "asf" }, { "wma",  "asf" },
  80             { "avi",  "avi" },
  81             { "au",   "au" },
  82             { "flac", "flac" },
  83             { "dv",   "dv" },
  84             { "m3u",  "m3u" },
  85             { "mkv",  "mkv" }, { "mka",  "mkv" }, { "mks",  "mkv" },
  86             { "mp4",  "mp4" }, { "m4a",  "mp4" }, { "mov",  "mp4" }, { "moov", "mp4" },
  87             { "mod",  "mod" }, { "xm",   "mod" },
  88             { "nsv",  "nsv" },
  89             { "ogg",  "ogg" }, { "ogm",  "ogg" },
  90             { "pva",  "pva" },
  91             { "rm",   "rm" },
  92             { "",  "" },
  93         };
  94
  95         char *psz_ext = strrchr( p_demux->psz_path, '.' ) + 1;
  96         int  i;
  97
  98         for( i = 0; exttodemux[i].ext != NULL; i++ )
  99         {
 100             if( !strcasecmp( psz_ext, exttodemux[i].ext ) )
 101             {
 102                 psz_module = exttodemux[i].demux;
 103                 break;
 104             }
 105         }
 106     }
 107
 108     /* Before module_Need (for var_Create...) */
 109     vlc_object_attach( p_demux, p_obj );
 110
 111     if( s )
 112     {
 113         p_demux->p_module =
 114             module_Need( p_demux, "demux2", psz_module,
 115                          !strcmp( psz_module, p_demux->psz_demux ) ? VLC_TRUE : VLC_FALSE );
 116     }
 117     else
 118     {
 119         p_demux->p_module =
 120             module_Need( p_demux, "access_demux", psz_module,
 121                          !strcmp( psz_module, p_demux->psz_access ) ? VLC_TRUE : VLC_FALSE );
 122     }
 123
 124     if( p_demux->p_module == NULL )
 125     {
 126         vlc_object_detach( p_demux );
 127         free( p_demux->psz_path );
 128         free( p_demux->psz_demux );
 129         free( p_demux->psz_access );
 130         vlc_object_destroy( p_demux );
 131         return NULL;
 132     }
 133
 134     return p_demux;
 135 }
 136
 137 /*****************************************************************************
 138  * demux2_Delete:
 139  *****************************************************************************/
 140 void demux2_Delete( demux_t *p_demux )
 141 {
 142     module_Unneed( p_demux, p_demux->p_module );
 143     vlc_object_detach( p_demux );
 144
 145     free( p_demux->psz_path );
 146     free( p_demux->psz_demux );
 147     free( p_demux->psz_access );
 148
 149     vlc_object_destroy( p_demux );
 150 }
 151
 152 /*****************************************************************************
 153  * demux2_vaControlHelper:
 154  *****************************************************************************/
 155 int demux2_vaControlHelper( stream_t *s,
 156                             int64_t i_start, int64_t i_end,
 157                             int i_bitrate, int i_align,
 158                             int i_query, va_list args )
 159 {
 160     int64_t i_tell;
 161     double  f, *pf;
 162     int64_t i64, *pi64;
 163
 164     if( i_end < 0 )    i_end   = stream_Size( s );
 165     if( i_start < 0 )  i_start = 0;
 166     if( i_align <= 0 ) i_align = 1;
 167     i_tell = stream_Tell( s );
 168
 169     switch( i_query )
 170     {
 171         case DEMUX_GET_LENGTH:
 172             pi64 = (int64_t*)va_arg( args, int64_t * );
 173             if( i_bitrate > 0 && i_end > i_start )
 174             {
 175                 *pi64 = I64C(8000000) * (i_end - i_start) / i_bitrate;
 176                 return VLC_SUCCESS;
 177             }
 178             return VLC_EGENERIC;
 179
 180         case DEMUX_GET_TIME:
 181             pi64 = (int64_t*)va_arg( args, int64_t * );
 182             if( i_bitrate > 0 && i_end > i_start )
 183             {
 184                 *pi64 = I64C(8000000) * (i_tell - i_start) / i_bitrate;
 185                 return VLC_SUCCESS;
 186             }
 187             return VLC_EGENERIC;
 188
 189         case DEMUX_GET_POSITION:
 190             pf = (double*)va_arg( args, double * );
 191             if( i_start < i_end )
 192             {
 193                 *pf = (double)( i_tell - i_start ) /
 194                       (double)( i_end  - i_start );
 195                 return VLC_SUCCESS;
 196             }
 197             return VLC_EGENERIC;
 198
 199
 200         case DEMUX_SET_POSITION:
 201             f = (double)va_arg( args, double );
 202             if( i_start < i_end && f >= 0.0 && f <= 1.0 )
 203             {
 204                 int64_t i_block = (f * ( i_end - i_start )) / i_align;
 205
 206                 if( stream_Seek( s, i_start + i_block * i_align ) )
 207                 {
 208                     return VLC_EGENERIC;
 209                 }
 210                 return VLC_SUCCESS;
 211             }
 212             return VLC_EGENERIC;
 213
 214         case DEMUX_SET_TIME:
 215             i64 = (int64_t)va_arg( args, int64_t );
 216             if( i_bitrate > 0 && i64 >= 0 )
 217             {
 218                 int64_t i_block = i64 * i_bitrate / I64C(8000000) / i_align;
 219                 if( stream_Seek( s, i_start + i_block * i_align ) )
 220                 {
 221                     return VLC_EGENERIC;
 222                 }
 223                 return VLC_SUCCESS;
 224             }
 225             return VLC_EGENERIC;
 226
 227         case DEMUX_GET_FPS:
 228         case DEMUX_GET_META:
 229         case DEMUX_SET_NEXT_DEMUX_TIME:
 230         case DEMUX_GET_TITLE_INFO:
 231             return VLC_EGENERIC;
 232
 233         default:
 234             msg_Err( s, "unknown query in demux_vaControlDefault" );
 235             return VLC_EGENERIC;
 236     }
 237 }
 238
 239 /****************************************************************************
 240  * stream_Demux*: create a demuxer for an outpout stream (allow demuxer chain)
 241  ****************************************************************************/
 242 typedef struct
 243 {
 244     /* Data buffer */
 245     vlc_mutex_t lock;
 246     int         i_buffer;
 247     int         i_buffer_size;
 248     uint8_t     *p_buffer;
 249
 250     int64_t     i_pos;
 251
 252     /* Demuxer */
 253     char        *psz_name;
 254     es_out_t    *out;
 255     demux_t     *p_demux;
 256 } d_stream_sys_t;
 257
 258 static int DStreamRead   ( stream_t *, void *p_read, int i_read );
 259 static int DStreamPeek   ( stream_t *, uint8_t **pp_peek, int i_peek );
 260 static int DStreamControl( stream_t *, int i_query, va_list );
 261 static int DStreamThread ( stream_t * );
 262
 263
 264 stream_t *__stream_DemuxNew( vlc_object_t *p_obj, char *psz_demux, es_out_t *out )
 265 {
 266     /* We create a stream reader, and launch a thread */
 267     stream_t       *s;
 268     d_stream_sys_t *p_sys;
 269
 270     if( psz_demux == NULL || *psz_demux == '\0' )
 271     {
 272         return NULL;
 273     }
 274
 275     s = vlc_object_create( p_obj, VLC_OBJECT_STREAM );
 276     s->pf_block  = NULL;
 277     s->pf_read   = DStreamRead;
 278     s->pf_peek   = DStreamPeek;
 279     s->pf_control= DStreamControl;
 280
 281     s->p_sys = malloc( sizeof( d_stream_sys_t) );
 282     p_sys = (d_stream_sys_t*)s->p_sys;
 283
 284     vlc_mutex_init( s, &p_sys->lock );
 285     p_sys->i_buffer = 0;
 286     p_sys->i_buffer_size = 1000000;
 287     p_sys->p_buffer = malloc( p_sys->i_buffer_size );
 288     p_sys->i_pos = 0;
 289     p_sys->psz_name = strdup( psz_demux );
 290     p_sys->out = out;
 291     p_sys->p_demux = NULL;
 292
 293     if( vlc_thread_create( s, "stream out", DStreamThread, VLC_THREAD_PRIORITY_INPUT, VLC_FALSE ) )
 294     {
 295         vlc_mutex_destroy( &p_sys->lock );
 296         vlc_object_destroy( s );
 297         free( p_sys );
 298         return NULL;
 299     }
 300
 301     return s;
 302 }
 303
 304 void     stream_DemuxSend( stream_t *s, block_t *p_block )
 305 {
 306     d_stream_sys_t *p_sys = (d_stream_sys_t*)s->p_sys;
 307
 308     if( p_block->i_buffer > 0 )
 309     {
 310         vlc_mutex_lock( &p_sys->lock );
 311         /* Realloc if needed */
 312         if( p_sys->i_buffer + p_block->i_buffer > p_sys->i_buffer_size )
 313         {
 314             if( p_sys->i_buffer_size > 5000000 )
 315             {
 316                 vlc_mutex_unlock( &p_sys->lock );
 317                 msg_Err( s, "stream_DemuxSend: buffer size > 5000000" );
 318                 block_Release( p_block );
 319                 return;
 320             }
 321             /* I know, it's more than needed but that's perfect */
 322             p_sys->i_buffer_size += p_block->i_buffer;
 323             /* FIXME won't work with PEEK -> segfault */
 324             p_sys->p_buffer = realloc( p_sys->p_buffer, p_sys->i_buffer_size );
 325             msg_Dbg( s, "stream_DemuxSend: realloc to %d", p_sys->i_buffer_size );
 326         }
 327
 328         /* copy data */
 329         memcpy( &p_sys->p_buffer[p_sys->i_buffer], p_block->p_buffer, p_block->i_buffer );
 330         p_sys->i_buffer += p_block->i_buffer;
 331
 332         vlc_mutex_unlock( &p_sys->lock );
 333     }
 334
 335     block_Release( p_block );
 336 }
 337
 338 void     stream_DemuxDelete( stream_t *s )
 339 {
 340     d_stream_sys_t *p_sys = (d_stream_sys_t*)s->p_sys;
 341
 342     s->b_die = VLC_TRUE;
 343
 344     vlc_mutex_lock( &p_sys->lock );
 345     if( p_sys->p_demux )
 346     {
 347         p_sys->p_demux->b_die = VLC_TRUE;
 348     }
 349     vlc_mutex_unlock( &p_sys->lock );
 350
 351     vlc_thread_join( s );
 352
 353     if( p_sys->p_demux )
 354     {
 355         demux2_Delete( p_sys->p_demux );
 356     }
 357     vlc_mutex_destroy( &p_sys->lock );
 358     free( p_sys->psz_name );
 359     free( p_sys->p_buffer );
 360     free( p_sys );
 361     vlc_object_destroy( s );
 362 }
 363
 364
 365 static int      DStreamRead   ( stream_t *s, void *p_read, int i_read )
 366 {
 367     d_stream_sys_t *p_sys = (d_stream_sys_t*)s->p_sys;
 368     int           i_copy;
 369
 370     //msg_Dbg( s, "DStreamRead: wanted %d bytes", i_read );
 371     for( ;; )
 372     {
 373         vlc_mutex_lock( &p_sys->lock );
 374         //msg_Dbg( s, "DStreamRead: buffer %d", p_sys->i_buffer );
 375         if( p_sys->i_buffer >= i_read || s->b_die )
 376         {
 377             break;
 378         }
 379         vlc_mutex_unlock( &p_sys->lock );
 380         msleep( 10000 );
 381     }
 382
 383     //msg_Dbg( s, "DStreamRead: read %d buffer %d", i_read, p_sys->i_buffer );
 384
 385     i_copy = __MIN( i_read, p_sys->i_buffer );
 386     if( i_copy > 0 )
 387     {
 388         if( p_read )
 389         {
 390             memcpy( p_read, p_sys->p_buffer, i_copy );
 391         }
 392         p_sys->i_buffer -= i_copy;
 393         p_sys->i_pos += i_copy;
 394
 395         if( p_sys->i_buffer > 0 )
 396         {
 397             memmove( p_sys->p_buffer, &p_sys->p_buffer[i_copy], p_sys->i_buffer );
 398         }
 399
 400     }
 401     vlc_mutex_unlock( &p_sys->lock );
 402
 403     return i_copy;
 404 }
 405 static int      DStreamPeek   ( stream_t *s, uint8_t **pp_peek, int i_peek )
 406 {
 407     d_stream_sys_t *p_sys = (d_stream_sys_t*)s->p_sys;
 408     int           i_copy;
 409
 410     //msg_Dbg( s, "DStreamPeek: wanted %d bytes", i_peek );
 411     for( ;; )
 412     {
 413         vlc_mutex_lock( &p_sys->lock );
 414         //msg_Dbg( s, "DStreamPeek: buffer %d", p_sys->i_buffer );
 415         if( p_sys->i_buffer >= i_peek || s->b_die )
 416         {
 417             break;
 418         }
 419         vlc_mutex_unlock( &p_sys->lock );
 420         msleep( 10000 );
 421     }
 422     *pp_peek = p_sys->p_buffer;
 423     i_copy = __MIN( i_peek, p_sys->i_buffer );
 424
 425     vlc_mutex_unlock( &p_sys->lock );
 426
 427     return i_copy;
 428 }
 429
 430 static int      DStreamControl( stream_t *s, int i_query, va_list args )
 431 {
 432     d_stream_sys_t *p_sys = (d_stream_sys_t*)s->p_sys;
 433     int64_t    *p_i64;
 434     vlc_bool_t *p_b;
 435     int        *p_int;
 436     switch( i_query )
 437     {
 438         case STREAM_GET_SIZE:
 439             p_i64 = (int64_t*) va_arg( args, int64_t * );
 440             *p_i64 = 0;
 441             return VLC_SUCCESS;
 442
 443         case STREAM_CAN_SEEK:
 444             p_b = (vlc_bool_t*) va_arg( args, vlc_bool_t * );
 445             *p_b = VLC_FALSE;
 446             return VLC_SUCCESS;
 447
 448         case STREAM_CAN_FASTSEEK:
 449             p_b = (vlc_bool_t*) va_arg( args, vlc_bool_t * );
 450             *p_b = VLC_FALSE;
 451             return VLC_SUCCESS;
 452
 453         case STREAM_GET_POSITION:
 454             p_i64 = (int64_t*) va_arg( args, int64_t * );
 455             *p_i64 = p_sys->i_pos;
 456             return VLC_SUCCESS;
 457
 458         case STREAM_SET_POSITION:
 459         {
 460             int64_t i64 = (int64_t)va_arg( args, int64_t );
 461             int i_skip;
 462             if( i64 < p_sys->i_pos )
 463                 return VLC_EGENERIC;
 464             i_skip = i64 - p_sys->i_pos;
 465
 466             while( i_skip > 0 )
 467             {
 468                 int i_read = DStreamRead( s, NULL, i_skip );
 469
 470                 if( i_read <= 0 )
 471                     return VLC_EGENERIC;
 472
 473                 i_skip -= i_read;
 474             }
 475             return VLC_SUCCESS;
 476         }
 477
 478         case STREAM_GET_MTU:
 479             p_int = (int*) va_arg( args, int * );
 480             *p_int = 0;
 481             return VLC_SUCCESS;
 482
 483         default:
 484             msg_Err( s, "invalid DStreamControl query=0x%x", i_query );
 485             return VLC_EGENERIC;
 486     }
 487 }
 488
 489 static int      DStreamThread ( stream_t *s )
 490 {
 491     d_stream_sys_t *p_sys = (d_stream_sys_t*)s->p_sys;
 492     demux_t      *p_demux;
 493
 494     /* Create the demuxer */
 495
 496     if( ( p_demux = demux2_New( s, "", p_sys->psz_name, "", s, p_sys->out ) ) == NULL )
 497     {
 498         return VLC_EGENERIC;
 499     }
 500
 501     vlc_mutex_lock( &p_sys->lock );
 502     p_sys->p_demux = p_demux;
 503     vlc_mutex_unlock( &p_sys->lock );
 504
 505     /* Main loop */
 506     while( !s->b_die && !p_demux->b_die )
 507     {
 508         if( p_demux->pf_demux( p_demux ) <= 0 )
 509         {
 510             break;
 511         }
 512     }
 513     p_demux->b_die = VLC_TRUE;
 514     return VLC_SUCCESS;
 515 }