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     /* Take into account "demux" to be able to do :demux=demuxdump */
  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     msg_Dbg( p_obj, "demux2_New: access='%s' demux='%s' path='%s'",
  59              p_demux->psz_access, p_demux->psz_demux, p_demux->psz_path );
  60
  61     p_demux->s          = s;
  62     p_demux->out        = out;
  63
  64     p_demux->pf_demux   = NULL;
  65     p_demux->pf_control = NULL;
  66     p_demux->p_sys      = NULL;
  67     p_demux->info.i_update = 0;
  68     p_demux->info.i_title  = 0;
  69     p_demux->info.i_seekpoint = 0;
  70
  71     if( s )
  72         psz_module = p_demux->psz_demux;
  73     else
  74         psz_module = p_demux->psz_access;
  75
  76     if( s && *psz_module == '\0' && strrchr( p_demux->psz_path, '.' ) )
  77     {
  78         /* XXX: add only file without any problem here and with strong detection.
  79          *  - no .mp3, .a52, ... (aac is added as it works only by file ext anyway
  80          *  - wav can't be added 'cause of a52 and dts in them as raw audio
  81          */
  82         static struct { char *ext; char *demux; } exttodemux[] =
  83         {
  84             { "aac",  "aac" },
  85             { "aiff", "aiff" },
  86             { "asf",  "asf" }, { "wmv",  "asf" }, { "wma",  "asf" },
  87             { "avi",  "avi" },
  88             { "au",   "au" },
  89             { "flac", "flac" },
  90             { "dv",   "dv" },
  91             { "m3u",  "m3u" },
  92             { "mkv",  "mkv" }, { "mka",  "mkv" }, { "mks",  "mkv" },
  93             { "mp4",  "mp4" }, { "m4a",  "mp4" }, { "mov",  "mp4" }, { "moov", "mp4" },
  94             { "mod",  "mod" }, { "xm",   "mod" },
  95             { "nsv",  "nsv" },
  96             { "ogg",  "ogg" }, { "ogm",  "ogg" },
  97             { "pva",  "pva" },
  98             { "rm",   "rm" },
  99             { "",  "" },
 100         };
 101
 102         char *psz_ext = strrchr( p_demux->psz_path, '.' ) + 1;
 103         int  i;
 104
 105         for( i = 0; exttodemux[i].ext != NULL; i++ )
 106         {
 107             if( !strcasecmp( psz_ext, exttodemux[i].ext ) )
 108             {
 109                 psz_module = exttodemux[i].demux;
 110                 break;
 111             }
 112         }
 113     }
 114
 115     /* Before module_Need (for var_Create...) */
 116     vlc_object_attach( p_demux, p_obj );
 117
 118     if( s )
 119     {
 120         p_demux->p_module =
 121             module_Need( p_demux, "demux2", psz_module,
 122                          !strcmp( psz_module, p_demux->psz_demux ) ? VLC_TRUE : VLC_FALSE );
 123     }
 124     else
 125     {
 126         p_demux->p_module =
 127             module_Need( p_demux, "access_demux", psz_module,
 128                          !strcmp( psz_module, p_demux->psz_access ) ? VLC_TRUE : VLC_FALSE );
 129     }
 130
 131     if( p_demux->p_module == NULL )
 132     {
 133         vlc_object_detach( p_demux );
 134         free( p_demux->psz_path );
 135         free( p_demux->psz_demux );
 136         free( p_demux->psz_access );
 137         vlc_object_destroy( p_demux );
 138         return NULL;
 139     }
 140
 141     return p_demux;
 142 }
 143
 144 /*****************************************************************************
 145  * demux2_Delete:
 146  *****************************************************************************/
 147 void demux2_Delete( demux_t *p_demux )
 148 {
 149     module_Unneed( p_demux, p_demux->p_module );
 150     vlc_object_detach( p_demux );
 151
 152     free( p_demux->psz_path );
 153     free( p_demux->psz_demux );
 154     free( p_demux->psz_access );
 155
 156     vlc_object_destroy( p_demux );
 157 }
 158
 159 /*****************************************************************************
 160  * demux2_vaControlHelper:
 161  *****************************************************************************/
 162 int demux2_vaControlHelper( stream_t *s,
 163                             int64_t i_start, int64_t i_end,
 164                             int i_bitrate, int i_align,
 165                             int i_query, va_list args )
 166 {
 167     int64_t i_tell;
 168     double  f, *pf;
 169     int64_t i64, *pi64;
 170
 171     if( i_end < 0 )    i_end   = stream_Size( s );
 172     if( i_start < 0 )  i_start = 0;
 173     if( i_align <= 0 ) i_align = 1;
 174     i_tell = stream_Tell( s );
 175
 176     switch( i_query )
 177     {
 178         case DEMUX_GET_LENGTH:
 179             pi64 = (int64_t*)va_arg( args, int64_t * );
 180             if( i_bitrate > 0 && i_end > i_start )
 181             {
 182                 *pi64 = I64C(8000000) * (i_end - i_start) / i_bitrate;
 183                 return VLC_SUCCESS;
 184             }
 185             return VLC_EGENERIC;
 186
 187         case DEMUX_GET_TIME:
 188             pi64 = (int64_t*)va_arg( args, int64_t * );
 189             if( i_bitrate > 0 && i_end > i_start )
 190             {
 191                 *pi64 = I64C(8000000) * (i_tell - i_start) / i_bitrate;
 192                 return VLC_SUCCESS;
 193             }
 194             return VLC_EGENERIC;
 195
 196         case DEMUX_GET_POSITION:
 197             pf = (double*)va_arg( args, double * );
 198             if( i_start < i_end )
 199             {
 200                 *pf = (double)( i_tell - i_start ) /
 201                       (double)( i_end  - i_start );
 202                 return VLC_SUCCESS;
 203             }
 204             return VLC_EGENERIC;
 205
 206
 207         case DEMUX_SET_POSITION:
 208             f = (double)va_arg( args, double );
 209             if( i_start < i_end && f >= 0.0 && f <= 1.0 )
 210             {
 211                 int64_t i_block = (f * ( i_end - i_start )) / i_align;
 212
 213                 if( stream_Seek( s, i_start + i_block * i_align ) )
 214                 {
 215                     return VLC_EGENERIC;
 216                 }
 217                 return VLC_SUCCESS;
 218             }
 219             return VLC_EGENERIC;
 220
 221         case DEMUX_SET_TIME:
 222             i64 = (int64_t)va_arg( args, int64_t );
 223             if( i_bitrate > 0 && i64 >= 0 )
 224             {
 225                 int64_t i_block = i64 * i_bitrate / I64C(8000000) / i_align;
 226                 if( stream_Seek( s, i_start + i_block * i_align ) )
 227                 {
 228                     return VLC_EGENERIC;
 229                 }
 230                 return VLC_SUCCESS;
 231             }
 232             return VLC_EGENERIC;
 233
 234         case DEMUX_GET_FPS:
 235         case DEMUX_GET_META:
 236         case DEMUX_SET_NEXT_DEMUX_TIME:
 237         case DEMUX_GET_TITLE_INFO:
 238             return VLC_EGENERIC;
 239
 240         default:
 241             msg_Err( s, "unknown query in demux_vaControlDefault" );
 242             return VLC_EGENERIC;
 243     }
 244 }
 245
 246 /****************************************************************************
 247  * stream_Demux*: create a demuxer for an outpout stream (allow demuxer chain)
 248  ****************************************************************************/
 249 typedef struct
 250 {
 251     /* Data buffer */
 252     vlc_mutex_t lock;
 253     int         i_buffer;
 254     int         i_buffer_size;
 255     uint8_t     *p_buffer;
 256
 257     int64_t     i_pos;
 258
 259     /* Demuxer */
 260     char        *psz_name;
 261     es_out_t    *out;
 262     demux_t     *p_demux;
 263 } d_stream_sys_t;
 264
 265 static int DStreamRead   ( stream_t *, void *p_read, int i_read );
 266 static int DStreamPeek   ( stream_t *, uint8_t **pp_peek, int i_peek );
 267 static int DStreamControl( stream_t *, int i_query, va_list );
 268 static int DStreamThread ( stream_t * );
 269
 270
 271 stream_t *__stream_DemuxNew( vlc_object_t *p_obj, char *psz_demux, es_out_t *out )
 272 {
 273     /* We create a stream reader, and launch a thread */
 274     stream_t       *s;
 275     d_stream_sys_t *p_sys;
 276
 277     if( psz_demux == NULL || *psz_demux == '\0' )
 278     {
 279         return NULL;
 280     }
 281
 282     s = vlc_object_create( p_obj, VLC_OBJECT_STREAM );
 283     s->pf_block  = NULL;
 284     s->pf_read   = DStreamRead;
 285     s->pf_peek   = DStreamPeek;
 286     s->pf_control= DStreamControl;
 287
 288     s->p_sys = malloc( sizeof( d_stream_sys_t) );
 289     p_sys = (d_stream_sys_t*)s->p_sys;
 290
 291     vlc_mutex_init( s, &p_sys->lock );
 292     p_sys->i_buffer = 0;
 293     p_sys->i_buffer_size = 1000000;
 294     p_sys->p_buffer = malloc( p_sys->i_buffer_size );
 295     p_sys->i_pos = 0;
 296     p_sys->psz_name = strdup( psz_demux );
 297     p_sys->out = out;
 298     p_sys->p_demux = NULL;
 299
 300     if( vlc_thread_create( s, "stream out", DStreamThread, VLC_THREAD_PRIORITY_INPUT, VLC_FALSE ) )
 301     {
 302         vlc_mutex_destroy( &p_sys->lock );
 303         vlc_object_destroy( s );
 304         free( p_sys );
 305         return NULL;
 306     }
 307
 308     return s;
 309 }
 310
 311 void     stream_DemuxSend( stream_t *s, block_t *p_block )
 312 {
 313     d_stream_sys_t *p_sys = (d_stream_sys_t*)s->p_sys;
 314
 315     if( p_block->i_buffer > 0 )
 316     {
 317         vlc_mutex_lock( &p_sys->lock );
 318         /* Realloc if needed */
 319         if( p_sys->i_buffer + p_block->i_buffer > p_sys->i_buffer_size )
 320         {
 321             if( p_sys->i_buffer_size > 5000000 )
 322             {
 323                 vlc_mutex_unlock( &p_sys->lock );
 324                 msg_Err( s, "stream_DemuxSend: buffer size > 5000000" );
 325                 block_Release( p_block );
 326                 return;
 327             }
 328             /* I know, it's more than needed but that's perfect */
 329             p_sys->i_buffer_size += p_block->i_buffer;
 330             /* FIXME won't work with PEEK -> segfault */
 331             p_sys->p_buffer = realloc( p_sys->p_buffer, p_sys->i_buffer_size );
 332             msg_Dbg( s, "stream_DemuxSend: realloc to %d", p_sys->i_buffer_size );
 333         }
 334
 335         /* copy data */
 336         memcpy( &p_sys->p_buffer[p_sys->i_buffer], p_block->p_buffer, p_block->i_buffer );
 337         p_sys->i_buffer += p_block->i_buffer;
 338
 339         vlc_mutex_unlock( &p_sys->lock );
 340     }
 341
 342     block_Release( p_block );
 343 }
 344
 345 void     stream_DemuxDelete( stream_t *s )
 346 {
 347     d_stream_sys_t *p_sys = (d_stream_sys_t*)s->p_sys;
 348
 349     s->b_die = VLC_TRUE;
 350
 351     vlc_mutex_lock( &p_sys->lock );
 352     if( p_sys->p_demux )
 353     {
 354         p_sys->p_demux->b_die = VLC_TRUE;
 355     }
 356     vlc_mutex_unlock( &p_sys->lock );
 357
 358     vlc_thread_join( s );
 359
 360     if( p_sys->p_demux )
 361     {
 362         demux2_Delete( p_sys->p_demux );
 363     }
 364     vlc_mutex_destroy( &p_sys->lock );
 365     free( p_sys->psz_name );
 366     free( p_sys->p_buffer );
 367     free( p_sys );
 368     vlc_object_destroy( s );
 369 }
 370
 371
 372 static int      DStreamRead   ( stream_t *s, void *p_read, int i_read )
 373 {
 374     d_stream_sys_t *p_sys = (d_stream_sys_t*)s->p_sys;
 375     int           i_copy;
 376
 377     //msg_Dbg( s, "DStreamRead: wanted %d bytes", i_read );
 378     for( ;; )
 379     {
 380         vlc_mutex_lock( &p_sys->lock );
 381         //msg_Dbg( s, "DStreamRead: buffer %d", p_sys->i_buffer );
 382         if( p_sys->i_buffer >= i_read || s->b_die )
 383         {
 384             break;
 385         }
 386         vlc_mutex_unlock( &p_sys->lock );
 387         msleep( 10000 );
 388     }
 389
 390     //msg_Dbg( s, "DStreamRead: read %d buffer %d", i_read, p_sys->i_buffer );
 391
 392     i_copy = __MIN( i_read, p_sys->i_buffer );
 393     if( i_copy > 0 )
 394     {
 395         if( p_read )
 396         {
 397             memcpy( p_read, p_sys->p_buffer, i_copy );
 398         }
 399         p_sys->i_buffer -= i_copy;
 400         p_sys->i_pos += i_copy;
 401
 402         if( p_sys->i_buffer > 0 )
 403         {
 404             memmove( p_sys->p_buffer, &p_sys->p_buffer[i_copy], p_sys->i_buffer );
 405         }
 406
 407     }
 408     vlc_mutex_unlock( &p_sys->lock );
 409
 410     return i_copy;
 411 }
 412 static int      DStreamPeek   ( stream_t *s, uint8_t **pp_peek, int i_peek )
 413 {
 414     d_stream_sys_t *p_sys = (d_stream_sys_t*)s->p_sys;
 415     int           i_copy;
 416
 417     //msg_Dbg( s, "DStreamPeek: wanted %d bytes", i_peek );
 418     for( ;; )
 419     {
 420         vlc_mutex_lock( &p_sys->lock );
 421         //msg_Dbg( s, "DStreamPeek: buffer %d", p_sys->i_buffer );
 422         if( p_sys->i_buffer >= i_peek || s->b_die )
 423         {
 424             break;
 425         }
 426         vlc_mutex_unlock( &p_sys->lock );
 427         msleep( 10000 );
 428     }
 429     *pp_peek = p_sys->p_buffer;
 430     i_copy = __MIN( i_peek, p_sys->i_buffer );
 431
 432     vlc_mutex_unlock( &p_sys->lock );
 433
 434     return i_copy;
 435 }
 436
 437 static int      DStreamControl( stream_t *s, int i_query, va_list args )
 438 {
 439     d_stream_sys_t *p_sys = (d_stream_sys_t*)s->p_sys;
 440     int64_t    *p_i64;
 441     vlc_bool_t *p_b;
 442     int        *p_int;
 443     switch( i_query )
 444     {
 445         case STREAM_GET_SIZE:
 446             p_i64 = (int64_t*) va_arg( args, int64_t * );
 447             *p_i64 = 0;
 448             return VLC_SUCCESS;
 449
 450         case STREAM_CAN_SEEK:
 451             p_b = (vlc_bool_t*) va_arg( args, vlc_bool_t * );
 452             *p_b = VLC_FALSE;
 453             return VLC_SUCCESS;
 454
 455         case STREAM_CAN_FASTSEEK:
 456             p_b = (vlc_bool_t*) va_arg( args, vlc_bool_t * );
 457             *p_b = VLC_FALSE;
 458             return VLC_SUCCESS;
 459
 460         case STREAM_GET_POSITION:
 461             p_i64 = (int64_t*) va_arg( args, int64_t * );
 462             *p_i64 = p_sys->i_pos;
 463             return VLC_SUCCESS;
 464
 465         case STREAM_SET_POSITION:
 466         {
 467             int64_t i64 = (int64_t)va_arg( args, int64_t );
 468             int i_skip;
 469             if( i64 < p_sys->i_pos )
 470                 return VLC_EGENERIC;
 471             i_skip = i64 - p_sys->i_pos;
 472
 473             while( i_skip > 0 )
 474             {
 475                 int i_read = DStreamRead( s, NULL, i_skip );
 476
 477                 if( i_read <= 0 )
 478                     return VLC_EGENERIC;
 479
 480                 i_skip -= i_read;
 481             }
 482             return VLC_SUCCESS;
 483         }
 484
 485         case STREAM_GET_MTU:
 486             p_int = (int*) va_arg( args, int * );
 487             *p_int = 0;
 488             return VLC_SUCCESS;
 489
 490         default:
 491             msg_Err( s, "invalid DStreamControl query=0x%x", i_query );
 492             return VLC_EGENERIC;
 493     }
 494 }
 495
 496 static int      DStreamThread ( stream_t *s )
 497 {
 498     d_stream_sys_t *p_sys = (d_stream_sys_t*)s->p_sys;
 499     demux_t      *p_demux;
 500
 501     /* Create the demuxer */
 502
 503     if( ( p_demux = demux2_New( s, "", p_sys->psz_name, "", s, p_sys->out ) ) == NULL )
 504     {
 505         return VLC_EGENERIC;
 506     }
 507
 508     vlc_mutex_lock( &p_sys->lock );
 509     p_sys->p_demux = p_demux;
 510     vlc_mutex_unlock( &p_sys->lock );
 511
 512     /* Main loop */
 513     while( !s->b_die && !p_demux->b_die )
 514     {
 515         if( p_demux->pf_demux( p_demux ) <= 0 )
 516         {
 517             break;
 518         }
 519     }
 520     p_demux->b_die = VLC_TRUE;
 521     return VLC_SUCCESS;
 522 }