git.sesse.net Git - vlc/blob - 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 #ifdef HAVE_CONFIG_H
  25 # include "config.h"
  26 #endif
  27
  28 #include "demux.h"
  29 #include <libvlc.h>
  30 #include <vlc_codec.h>
  31 #include <vlc_meta.h>
  32
  33 static bool SkipID3Tag( demux_t * );
  34 static bool SkipAPETag( demux_t *p_demux );
  35
  36 /*****************************************************************************
  37  * demux_New:
  38  *  if s is NULL then load a access_demux
  39  *****************************************************************************/
  40 demux_t *__demux_New( vlc_object_t *p_obj,
  41                        const char *psz_access, const char *psz_demux,
  42                        const char *psz_path,
  43                        stream_t *s, es_out_t *out, bool b_quick )
  44 {
  45     static const char typename[] = "demux";
  46     demux_t *p_demux = vlc_custom_create( p_obj, sizeof( *p_demux ),
  47                                           VLC_OBJECT_GENERIC, typename );
  48     const char *psz_module;
  49
  50     if( p_demux == NULL ) return NULL;
  51
  52     /* Parse URL */
  53     p_demux->psz_access = strdup( psz_access );
  54     p_demux->psz_demux  = strdup( psz_demux );
  55     p_demux->psz_path   = strdup( psz_path );
  56
  57     /* Take into account "demux" to be able to do :demux=dump */
  58     if( p_demux->psz_demux && *p_demux->psz_demux == '\0' )
  59     {
  60         free( p_demux->psz_demux );
  61         p_demux->psz_demux = var_GetNonEmptyString( p_obj, "demux" );
  62         if( p_demux->psz_demux == NULL )
  63             p_demux->psz_demux = strdup( "" );
  64     }
  65
  66     if( !b_quick )
  67     {
  68         msg_Dbg( p_obj, "creating demux: access='%s' demux='%s' path='%s'",
  69                  p_demux->psz_access, p_demux->psz_demux, p_demux->psz_path );
  70     }
  71
  72     p_demux->s          = s;
  73     p_demux->out        = out;
  74
  75     p_demux->pf_demux   = NULL;
  76     p_demux->pf_control = NULL;
  77     p_demux->p_sys      = NULL;
  78     p_demux->info.i_update = 0;
  79     p_demux->info.i_title  = 0;
  80     p_demux->info.i_seekpoint = 0;
  81
  82     if( s ) psz_module = p_demux->psz_demux;
  83     else psz_module = p_demux->psz_access;
  84
  85     if( s && *psz_module == '\0' && strrchr( p_demux->psz_path, '.' ) )
  86     {
  87        /* XXX: add only file without any problem here and with strong detection.
  88         *  - no .mp3, .a52, ... (aac is added as it works only by file ext
  89         *     anyway
  90         *  - wav can't be added 'cause of a52 and dts in them as raw audio
  91          */
  92          static const struct { char ext[5]; char demux[9]; } exttodemux[] =
  93          {
  94             { "aac",  "aac" },
  95             { "aiff", "aiff" },
  96             { "asf",  "asf" }, { "wmv",  "asf" }, { "wma",  "asf" },
  97             { "avi",  "avi" },
  98             { "au",   "au" },
  99             { "flac", "flac" },
 100             { "dv",   "dv" },
 101             { "m3u",  "playlist" },
 102             { "mkv",  "mkv" }, { "mka",  "mkv" }, { "mks",  "mkv" },
 103             { "mp4",  "mp4" }, { "m4a",  "mp4" }, { "mov",  "mp4" }, { "moov", "mp4" },
 104             { "mod",  "mod" }, { "it",  "mod" }, { "s3m",  "mod" }, { "xm",   "mod" },
 105             { "nsv",  "nsv" },
 106             { "ogg",  "ogg" }, { "ogm",  "ogg" }, /* legacy Ogg */
 107             { "oga",  "ogg" }, { "spx",  "ogg" }, { "ogv", "ogg" },
 108             { "ogx",  "ogg" }, /*RFC5334*/
 109             { "pva",  "pva" },
 110             { "rm",   "rm" },
 111             { "m4v",  "m4v" },
 112             { "h264", "h264" },
 113             { "voc",  "voc" },
 114             { "mid",  "smf" }, { "rmi",  "smf" },
 115
 116             { "jpeg", "image" },
 117             { "jpg",  "image" },
 118             { "ljpg", "image" },
 119             { "png",  "image" },
 120             { "pgm",  "image" },
 121             { "pgmyuv", "image" },
 122             { "pbm",  "image" },
 123             { "pam",  "image" },
 124             { "tga",  "image" },
 125             { "bmp",  "image" },
 126             { "pnm",  "image" },
 127             { "xpm",  "image" },
 128             { "xcf",  "image" },
 129             { "pcx",  "image" },
 130             { "gif",  "image" },
 131             { "tif",  "image" },
 132             { "tiff", "image" },
 133             { "lbm",  "image" },
 134
 135             { "",  "" },
 136         };
 137         /* Here, we don't mind if it does not work, it must be quick */
 138         static const struct { char ext[4]; char demux[5]; } exttodemux_quick[] =
 139         {
 140             { "mp3", "mpga" },
 141             { "ogg", "ogg" },
 142             { "wma", "asf" },
 143             { "", "" }
 144         };
 145
 146         const char *psz_ext = strrchr( p_demux->psz_path, '.' ) + 1;
 147         int  i;
 148
 149         if( !b_quick )
 150         {
 151             for( i = 0; exttodemux[i].ext[0]; i++ )
 152             {
 153                 if( !strcasecmp( psz_ext, exttodemux[i].ext ) )
 154                 {
 155                     psz_module = exttodemux[i].demux;
 156                     break;
 157                 }
 158             }
 159         }
 160         else
 161         {
 162             for( i = 0; exttodemux_quick[i].ext[0]; i++ )
 163             {
 164                 if( !strcasecmp( psz_ext, exttodemux_quick[i].ext ) )
 165                 {
 166                     psz_module = exttodemux_quick[i].demux;
 167                     break;
 168                 }
 169             }
 170
 171         }
 172     }
 173
 174     /* Before module_need (for var_Create...) */
 175     vlc_object_attach( p_demux, p_obj );
 176
 177     if( s )
 178     {
 179         /* ID3/APE tags will mess-up demuxer probing so we skip it here.
 180          * ID3/APE parsers will called later on in the demuxer to access the
 181          * skipped info. */
 182         if( !SkipID3Tag( p_demux ) )
 183             SkipAPETag( p_demux );
 184
 185         p_demux->p_module =
 186             module_need( p_demux, "demux", psz_module,
 187                          !strcmp( psz_module, p_demux->psz_demux ) ?
 188                          true : false );
 189     }
 190     else
 191     {
 192         p_demux->p_module =
 193             module_need( p_demux, "access_demux", psz_module,
 194                          !strcmp( psz_module, p_demux->psz_access ) ?
 195                          true : false );
 196     }
 197
 198     if( p_demux->p_module == NULL )
 199     {
 200         vlc_object_detach( p_demux );
 201         free( p_demux->psz_path );
 202         free( p_demux->psz_demux );
 203         free( p_demux->psz_access );
 204         vlc_object_release( p_demux );
 205         return NULL;
 206     }
 207
 208     return p_demux;
 209 }
 210
 211 /*****************************************************************************
 212  * demux_Delete:
 213  *****************************************************************************/
 214 void demux_Delete( demux_t *p_demux )
 215 {
 216     module_unneed( p_demux, p_demux->p_module );
 217     vlc_object_detach( p_demux );
 218
 219     free( p_demux->psz_path );
 220     free( p_demux->psz_demux );
 221     free( p_demux->psz_access );
 222
 223     vlc_object_release( p_demux );
 224 }
 225
 226 /*****************************************************************************
 227  * demux_vaControlHelper:
 228  *****************************************************************************/
 229 int demux_vaControlHelper( stream_t *s,
 230                             int64_t i_start, int64_t i_end,
 231                             int64_t i_bitrate, int i_align,
 232                             int i_query, va_list args )
 233 {
 234     int64_t i_tell;
 235     double  f, *pf;
 236     int64_t i64, *pi64;
 237
 238     if( i_end < 0 )    i_end   = stream_Size( s );
 239     if( i_start < 0 )  i_start = 0;
 240     if( i_align <= 0 ) i_align = 1;
 241     i_tell = stream_Tell( s );
 242
 243     switch( i_query )
 244     {
 245         case DEMUX_GET_LENGTH:
 246             pi64 = (int64_t*)va_arg( args, int64_t * );
 247             if( i_bitrate > 0 && i_end > i_start )
 248             {
 249                 *pi64 = INT64_C(8000000) * (i_end - i_start) / i_bitrate;
 250                 return VLC_SUCCESS;
 251             }
 252             return VLC_EGENERIC;
 253
 254         case DEMUX_GET_TIME:
 255             pi64 = (int64_t*)va_arg( args, int64_t * );
 256             if( i_bitrate > 0 && i_end > i_start )
 257             {
 258                 *pi64 = INT64_C(8000000) * (i_tell - i_start) / i_bitrate;
 259                 return VLC_SUCCESS;
 260             }
 261             return VLC_EGENERIC;
 262
 263         case DEMUX_GET_POSITION:
 264             pf = (double*)va_arg( args, double * );
 265             if( i_start < i_end )
 266             {
 267                 *pf = (double)( i_tell - i_start ) /
 268                       (double)( i_end  - i_start );
 269                 return VLC_SUCCESS;
 270             }
 271             return VLC_EGENERIC;
 272
 273
 274         case DEMUX_SET_POSITION:
 275             f = (double)va_arg( args, double );
 276             if( i_start < i_end && f >= 0.0 && f <= 1.0 )
 277             {
 278                 int64_t i_block = (f * ( i_end - i_start )) / i_align;
 279
 280                 if( stream_Seek( s, i_start + i_block * i_align ) )
 281                 {
 282                     return VLC_EGENERIC;
 283                 }
 284                 return VLC_SUCCESS;
 285             }
 286             return VLC_EGENERIC;
 287
 288         case DEMUX_SET_TIME:
 289             i64 = (int64_t)va_arg( args, int64_t );
 290             if( i_bitrate > 0 && i64 >= 0 )
 291             {
 292                 int64_t i_block = i64 * i_bitrate / INT64_C(8000000) / i_align;
 293                 if( stream_Seek( s, i_start + i_block * i_align ) )
 294                 {
 295                     return VLC_EGENERIC;
 296                 }
 297                 return VLC_SUCCESS;
 298             }
 299             return VLC_EGENERIC;
 300
 301         case DEMUX_GET_FPS:
 302         case DEMUX_GET_META:
 303         case DEMUX_HAS_UNSUPPORTED_META:
 304         case DEMUX_SET_NEXT_DEMUX_TIME:
 305         case DEMUX_GET_TITLE_INFO:
 306         case DEMUX_SET_GROUP:
 307         case DEMUX_GET_ATTACHMENTS:
 308         case DEMUX_CAN_RECORD:
 309         case DEMUX_SET_RECORD_STATE:
 310             return VLC_EGENERIC;
 311
 312         default:
 313             msg_Err( s, "unknown query in demux_vaControlDefault" );
 314             return VLC_EGENERIC;
 315     }
 316 }
 317
 318 /****************************************************************************
 319  * Utility functions
 320  ****************************************************************************/
 321 decoder_t *demux_PacketizerNew( demux_t *p_demux, es_format_t *p_fmt, const char *psz_msg )
 322 {
 323     decoder_t *p_packetizer = vlc_object_create( p_demux, VLC_OBJECT_PACKETIZER );
 324
 325     if( !p_packetizer )
 326     {
 327         es_format_Clean( p_fmt );
 328         return NULL;
 329     }
 330
 331     p_packetizer->pf_decode_audio = NULL;
 332     p_packetizer->pf_decode_video = NULL;
 333     p_packetizer->pf_decode_sub = NULL;
 334     p_packetizer->pf_packetize = NULL;
 335
 336     p_packetizer->fmt_in = *p_fmt;
 337     es_format_Init( &p_packetizer->fmt_out, UNKNOWN_ES, 0 );
 338
 339     p_packetizer->p_module = module_need( p_packetizer, "packetizer", NULL, false );
 340     if( !p_packetizer->p_module )
 341     {
 342         es_format_Clean( p_fmt );
 343         vlc_object_release( p_packetizer );
 344         msg_Err( p_demux, "cannot find packetizer for %s", psz_msg );
 345         return NULL;
 346     }
 347
 348     return p_packetizer;
 349 }
 350 void demux_PacketizerDestroy( decoder_t *p_packetizer )
 351 {
 352     if( p_packetizer->p_module )
 353         module_unneed( p_packetizer, p_packetizer->p_module );
 354     es_format_Clean( &p_packetizer->fmt_in );
 355     if( p_packetizer->p_description )
 356         vlc_meta_Delete( p_packetizer->p_description );
 357     vlc_object_release( p_packetizer );
 358 }
 359
 360 static bool SkipID3Tag( demux_t *p_demux )
 361 {
 362     const uint8_t *p_peek;
 363     uint8_t version, revision;
 364     int i_size;
 365     int b_footer;
 366
 367     if( !p_demux->s )
 368         return false;
 369
 370     /* Get 10 byte id3 header */
 371     if( stream_Peek( p_demux->s, &p_peek, 10 ) < 10 )
 372         return false;
 373
 374     if( memcmp( p_peek, "ID3", 3 ) )
 375         return false;
 376
 377     version = p_peek[3];
 378     revision = p_peek[4];
 379     b_footer = p_peek[5] & 0x10;
 380     i_size = (p_peek[6]<<21) + (p_peek[7]<<14) + (p_peek[8]<<7) + p_peek[9];
 381
 382     if( b_footer ) i_size += 10;
 383     i_size += 10;
 384
 385     /* Skip the entire tag */
 386     stream_Read( p_demux->s, NULL, i_size );
 387
 388     msg_Dbg( p_demux, "ID3v2.%d revision %d tag found, skipping %d bytes",
 389              version, revision, i_size );
 390     return true;
 391 }
 392 static bool SkipAPETag( demux_t *p_demux )
 393 {
 394     const uint8_t *p_peek;
 395     int i_version;
 396     int i_size;
 397     uint32_t flags;
 398
 399     if( !p_demux->s )
 400         return false;
 401
 402     /* Get 32 byte ape header */
 403     if( stream_Peek( p_demux->s, &p_peek, 32 ) < 32 )
 404         return false;
 405
 406     if( memcmp( p_peek, "APETAGEX", 8 ) )
 407         return false;
 408
 409     i_version = GetDWLE( &p_peek[8] );
 410     flags = GetDWLE( &p_peek[8+4+4] );
 411     if( ( i_version != 1000 && i_version != 2000 ) || !( flags & (1<<29) ) )
 412         return false;
 413
 414     i_size = GetDWLE( &p_peek[8+4] ) + ( (flags&(1<<30)) ? 32 : 0 );
 415
 416     /* Skip the entire tag */
 417     stream_Read( p_demux->s, NULL, i_size );
 418
 419     msg_Dbg( p_demux, "AP2 v%d tag found, skipping %d bytes",
 420              i_version/1000, i_size );
 421     return true;
 422 }
 423