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             { NULL,  NULL },
 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 ) ?
 123                          VLC_TRUE : VLC_FALSE );
 124     }
 125     else
 126     {
 127         p_demux->p_module =
 128             module_Need( p_demux, "access_demux", psz_module,
 129                          !strcmp( psz_module, p_demux->psz_access ) ?
 130                          VLC_TRUE : VLC_FALSE );
 131     }
 132
 133     if( p_demux->p_module == NULL )
 134     {
 135         vlc_object_detach( p_demux );
 136         free( p_demux->psz_path );
 137         free( p_demux->psz_demux );
 138         free( p_demux->psz_access );
 139         vlc_object_destroy( p_demux );
 140         return NULL;
 141     }
 142
 143     return p_demux;
 144 }
 145
 146 /*****************************************************************************
 147  * demux2_Delete:
 148  *****************************************************************************/
 149 void demux2_Delete( demux_t *p_demux )
 150 {
 151     module_Unneed( p_demux, p_demux->p_module );
 152     vlc_object_detach( p_demux );
 153
 154     free( p_demux->psz_path );
 155     free( p_demux->psz_demux );
 156     free( p_demux->psz_access );
 157
 158     vlc_object_destroy( p_demux );
 159 }
 160
 161 /*****************************************************************************
 162  * demux2_vaControlHelper:
 163  *****************************************************************************/
 164 int demux2_vaControlHelper( stream_t *s,
 165                             int64_t i_start, int64_t i_end,
 166                             int i_bitrate, int i_align,
 167                             int i_query, va_list args )
 168 {
 169     int64_t i_tell;
 170     double  f, *pf;
 171     int64_t i64, *pi64;
 172
 173     if( i_end < 0 )    i_end   = stream_Size( s );
 174     if( i_start < 0 )  i_start = 0;
 175     if( i_align <= 0 ) i_align = 1;
 176     i_tell = stream_Tell( s );
 177
 178     switch( i_query )
 179     {
 180         case DEMUX_GET_LENGTH:
 181             pi64 = (int64_t*)va_arg( args, int64_t * );
 182             if( i_bitrate > 0 && i_end > i_start )
 183             {
 184                 *pi64 = I64C(8000000) * (i_end - i_start) / i_bitrate;
 185                 return VLC_SUCCESS;
 186             }
 187             return VLC_EGENERIC;
 188
 189         case DEMUX_GET_TIME:
 190             pi64 = (int64_t*)va_arg( args, int64_t * );
 191             if( i_bitrate > 0 && i_end > i_start )
 192             {
 193                 *pi64 = I64C(8000000) * (i_tell - i_start) / i_bitrate;
 194                 return VLC_SUCCESS;
 195             }
 196             return VLC_EGENERIC;
 197
 198         case DEMUX_GET_POSITION:
 199             pf = (double*)va_arg( args, double * );
 200             if( i_start < i_end )
 201             {
 202                 *pf = (double)( i_tell - i_start ) /
 203                       (double)( i_end  - i_start );
 204                 return VLC_SUCCESS;
 205             }
 206             return VLC_EGENERIC;
 207
 208
 209         case DEMUX_SET_POSITION:
 210             f = (double)va_arg( args, double );
 211             if( i_start < i_end && f >= 0.0 && f <= 1.0 )
 212             {
 213                 int64_t i_block = (f * ( i_end - i_start )) / i_align;
 214
 215                 if( stream_Seek( s, i_start + i_block * i_align ) )
 216                 {
 217                     return VLC_EGENERIC;
 218                 }
 219                 return VLC_SUCCESS;
 220             }
 221             return VLC_EGENERIC;
 222
 223         case DEMUX_SET_TIME:
 224             i64 = (int64_t)va_arg( args, int64_t );
 225             if( i_bitrate > 0 && i64 >= 0 )
 226             {
 227                 int64_t i_block = i64 * i_bitrate / I64C(8000000) / i_align;
 228                 if( stream_Seek( s, i_start + i_block * i_align ) )
 229                 {
 230                     return VLC_EGENERIC;
 231                 }
 232                 return VLC_SUCCESS;
 233             }
 234             return VLC_EGENERIC;
 235
 236         case DEMUX_GET_FPS:
 237         case DEMUX_GET_META:
 238         case DEMUX_SET_NEXT_DEMUX_TIME:
 239         case DEMUX_GET_TITLE_INFO:
 240         case DEMUX_SET_GROUP:
 241             return VLC_EGENERIC;
 242
 243         default:
 244             msg_Err( s, "unknown query in demux_vaControlDefault" );
 245             return VLC_EGENERIC;
 246     }
 247 }
 248
 249 /****************************************************************************
 250  * stream_Demux*: create a demuxer for an outpout stream (allow demuxer chain)
 251  ****************************************************************************/
 252 typedef struct
 253 {
 254     /* Data buffer */
 255     block_fifo_t *p_fifo;
 256     block_t      *p_block;
 257
 258     int64_t     i_pos;
 259
 260     /* Demuxer */
 261     char        *psz_name;
 262     es_out_t    *out;
 263     demux_t     *p_demux;
 264
 265 } d_stream_sys_t;
 266
 267 static int DStreamRead   ( stream_t *, void *p_read, int i_read );
 268 static int DStreamPeek   ( stream_t *, uint8_t **pp_peek, int i_peek );
 269 static int DStreamControl( stream_t *, int i_query, va_list );
 270 static int DStreamThread ( stream_t * );
 271
 272
 273 stream_t *__stream_DemuxNew( vlc_object_t *p_obj, char *psz_demux,
 274                              es_out_t *out )
 275 {
 276     /* We create a stream reader, and launch a thread */
 277     stream_t       *s;
 278     d_stream_sys_t *p_sys;
 279
 280     if( psz_demux == NULL || *psz_demux == '\0' ) return NULL;
 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     p_sys->i_pos = 0;
 292     p_sys->out = out;
 293     p_sys->p_demux = NULL;
 294     p_sys->p_block = NULL;
 295     p_sys->psz_name = strdup( psz_demux );
 296
 297     /* decoder fifo */
 298     if( ( p_sys->p_fifo = block_FifoNew( s ) ) == NULL )
 299     {
 300         msg_Err( s, "out of memory" );
 301         vlc_object_destroy( s );
 302         free( p_sys );
 303         return NULL;
 304     }
 305
 306     if( vlc_thread_create( s, "stream out", DStreamThread,
 307                            VLC_THREAD_PRIORITY_INPUT, VLC_FALSE ) )
 308     {
 309         vlc_object_destroy( s );
 310         free( p_sys );
 311         return NULL;
 312     }
 313
 314     return s;
 315 }
 316
 317 void stream_DemuxSend( stream_t *s, block_t *p_block )
 318 {
 319     d_stream_sys_t *p_sys = (d_stream_sys_t*)s->p_sys;
 320     if( p_block ) block_FifoPut( p_sys->p_fifo, p_block );
 321 }
 322
 323 void stream_DemuxDelete( stream_t *s )
 324 {
 325     d_stream_sys_t *p_sys = (d_stream_sys_t*)s->p_sys;
 326     block_t *p_empty;
 327
 328     s->b_die = VLC_TRUE;
 329     if( p_sys->p_demux ) p_sys->p_demux->b_die = VLC_TRUE;
 330     p_empty = block_New( s, 1 ); p_empty->i_buffer = 0;
 331     block_FifoPut( p_sys->p_fifo, p_empty );
 332     vlc_thread_join( s );
 333
 334     if( p_sys->p_demux ) demux2_Delete( p_sys->p_demux );
 335     if( p_sys->p_block ) block_Release( p_sys->p_block );
 336
 337     block_FifoRelease( p_sys->p_fifo );
 338     free( p_sys->psz_name );
 339     free( p_sys );
 340
 341     vlc_object_destroy( s );
 342 }
 343
 344
 345 static int DStreamRead( stream_t *s, void *p_read, int i_read )
 346 {
 347     d_stream_sys_t *p_sys = (d_stream_sys_t*)s->p_sys;
 348     uint8_t *p_out = p_read;
 349     int i_out = 0;
 350
 351     //msg_Dbg( s, "DStreamRead: wanted %d bytes", i_read );
 352
 353     while( !s->b_die && !s->b_error && i_read )
 354     {
 355         block_t *p_block = p_sys->p_block;
 356         int i_copy;
 357
 358         if( !p_block )
 359         {
 360             p_block = block_FifoGet( p_sys->p_fifo );
 361             if( !p_block ) s->b_error = 1;
 362             p_sys->p_block = p_block;
 363         }
 364
 365         if( p_block && i_read )
 366         {
 367             i_copy = __MIN( i_read, p_block->i_buffer );
 368             if( p_out && i_copy ) memcpy( p_out, p_block->p_buffer, i_copy );
 369             i_read -= i_copy;
 370             i_out += i_copy;
 371             p_block->i_buffer -= i_copy;
 372             p_block->p_buffer += i_copy;
 373
 374             if( !p_block->i_buffer )
 375             {
 376                 block_Release( p_block );
 377                 p_sys->p_block = NULL;
 378             }
 379         }
 380     }
 381
 382     p_sys->i_pos += i_out;
 383     return i_out;
 384 }
 385
 386 static int DStreamPeek( stream_t *s, uint8_t **pp_peek, int i_peek )
 387 {
 388     d_stream_sys_t *p_sys = (d_stream_sys_t*)s->p_sys;
 389     block_t **pp_block = &p_sys->p_block;
 390     int i_out = 0;
 391     *pp_peek = 0;
 392
 393     //msg_Dbg( s, "DStreamPeek: wanted %d bytes", i_peek );
 394
 395     while( !s->b_die && !s->b_error && i_peek )
 396     {
 397         int i_copy;
 398
 399         if( !*pp_block )
 400         {
 401             *pp_block = block_FifoGet( p_sys->p_fifo );
 402             if( !*pp_block ) s->b_error = 1;
 403         }
 404
 405         if( *pp_block && i_peek )
 406         {
 407             i_copy = __MIN( i_peek, (*pp_block)->i_buffer );
 408             i_peek -= i_copy;
 409             i_out += i_copy;
 410
 411             if( i_peek ) pp_block = &(*pp_block)->p_next;
 412         }
 413     }
 414
 415     if( p_sys->p_block )
 416     {
 417         p_sys->p_block = block_ChainGather( p_sys->p_block );
 418         *pp_peek = p_sys->p_block->p_buffer;
 419     }
 420
 421     return i_out;
 422 }
 423
 424 static int DStreamControl( stream_t *s, int i_query, va_list args )
 425 {
 426     d_stream_sys_t *p_sys = (d_stream_sys_t*)s->p_sys;
 427     int64_t    *p_i64;
 428     vlc_bool_t *p_b;
 429     int        *p_int;
 430
 431     switch( i_query )
 432     {
 433         case STREAM_GET_SIZE:
 434             p_i64 = (int64_t*) va_arg( args, int64_t * );
 435             *p_i64 = 0;
 436             return VLC_SUCCESS;
 437
 438         case STREAM_CAN_SEEK:
 439             p_b = (vlc_bool_t*) va_arg( args, vlc_bool_t * );
 440             *p_b = VLC_FALSE;
 441             return VLC_SUCCESS;
 442
 443         case STREAM_CAN_FASTSEEK:
 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_GET_POSITION:
 449             p_i64 = (int64_t*) va_arg( args, int64_t * );
 450             *p_i64 = p_sys->i_pos;
 451             return VLC_SUCCESS;
 452
 453         case STREAM_SET_POSITION:
 454         {
 455             int64_t i64 = (int64_t)va_arg( args, int64_t );
 456             int i_skip;
 457             if( i64 < p_sys->i_pos ) return VLC_EGENERIC;
 458             i_skip = i64 - p_sys->i_pos;
 459
 460             while( i_skip > 0 )
 461             {
 462                 int i_read = DStreamRead( s, NULL, i_skip );
 463                 if( i_read <= 0 ) return VLC_EGENERIC;
 464                 i_skip -= i_read;
 465             }
 466             return VLC_SUCCESS;
 467         }
 468
 469         case STREAM_GET_MTU:
 470             p_int = (int*) va_arg( args, int * );
 471             *p_int = 0;
 472             return VLC_SUCCESS;
 473
 474         case STREAM_CONTROL_ACCESS:
 475             return VLC_EGENERIC;
 476
 477         default:
 478             msg_Err( s, "invalid DStreamControl query=0x%x", i_query );
 479             return VLC_EGENERIC;
 480     }
 481 }
 482
 483 static int DStreamThread( stream_t *s )
 484 {
 485     d_stream_sys_t *p_sys = (d_stream_sys_t*)s->p_sys;
 486     demux_t *p_demux;
 487
 488     /* Create the demuxer */
 489     if( !(p_demux = demux2_New( s, "", p_sys->psz_name, "", s, p_sys->out )) )
 490     {
 491         return VLC_EGENERIC;
 492     }
 493
 494     p_sys->p_demux = p_demux;
 495
 496     /* Main loop */
 497     while( !s->b_die && !p_demux->b_die )
 498     {
 499         if( p_demux->pf_demux( p_demux ) <= 0 ) break;
 500     }
 501
 502     p_demux->b_die = VLC_TRUE;
 503     return VLC_SUCCESS;
 504 }