src/input/demux.c

   1 /*****************************************************************************
   2  * demux.c
   3  *****************************************************************************
   4  * Copyright (C) 1999-2004 VLC authors and 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 it
  10  * under the terms of the GNU Lesser General Public License as published by
  11  * the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU Lesser General Public License
  20  * along with this program; if not, write to the Free Software Foundation,
  21  * 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 <assert.h>
  29 #include <limits.h>
  30
  31 #include "demux.h"
  32 #include <libvlc.h>
  33 #include <vlc_codec.h>
  34 #include <vlc_meta.h>
  35 #include <vlc_input.h>
  36 #include <vlc_url.h>
  37 #include <vlc_modules.h>
  38 #include <vlc_strings.h>
  39
  40 typedef const struct
  41 {
  42     char const key[20];
  43     char const name[8];
  44
  45 } demux_mapping;
  46
  47 static int demux_mapping_cmp( const void *k, const void *v )
  48 {
  49     demux_mapping* entry = v;
  50     return vlc_ascii_strcasecmp( k, entry->key );
  51 }
  52
  53 static demux_mapping* demux_lookup( char const* key,
  54                                     demux_mapping* data, size_t size )
  55 {
  56     return bsearch( key, data, size, sizeof( *data ), demux_mapping_cmp );
  57 }
  58
  59 static const char *demux_NameFromMimeType(const char *mime)
  60 {
  61     static demux_mapping types[] =
  62     {   /* Must be sorted in ascending ASCII order */
  63         { "audio/aac",           "m4a"     },
  64         { "audio/aacp",          "m4a"     },
  65         { "audio/mpeg",          "mp3"     },
  66         //{ "video/MP1S",          "es,mpgv" }, !b_force
  67         { "video/dv",            "rawdv"   },
  68         { "video/MP2P",          "ps"      },
  69         { "video/MP2T",          "ts"      },
  70         { "video/nsa",           "nsv"     },
  71         { "video/nsv",           "nsv"     },
  72     };
  73     demux_mapping *type = demux_lookup( mime, types, ARRAY_SIZE( types ) );
  74     return (type != NULL) ? type->name : "any";
  75 }
  76
  77 static const char* DemuxNameFromExtension( char const* ext,
  78                                            bool b_preparsing )
  79 {
  80     /* NOTE: Add only file without any problems here and with strong detection:
  81      * - no .mp3, .a52, ...
  82      *  - wav can't be added 'cause of a52 and dts in them as raw audio
  83      */
  84     static demux_mapping strong[] =
  85     { /* NOTE: must be sorted in asc order */
  86         { "aiff", "aiff" },
  87         { "asf",  "asf" },
  88         { "au",   "au" },
  89         { "avi",  "avi" },
  90         { "drc",  "dirac" },
  91         { "dv",   "dv" },
  92         { "flac", "flac" },
  93         { "h264", "h264" },
  94         { "kar", "smf" },
  95         { "m3u",  "m3u" },
  96         { "m4a",  "mp4" },
  97         { "m4v",  "m4v" },
  98         { "mid",  "smf" },
  99         { "mka",  "mkv" },
 100         { "mks",  "mkv" },
 101         { "mkv",  "mkv" },
 102         { "moov", "mp4" },
 103         { "mov",  "mp4" },
 104         { "mp4",  "mp4" },
 105         { "nsv",  "nsv" },
 106         { "oga",  "ogg" },
 107         { "ogg",  "ogg" },
 108         { "ogm",  "ogg" },
 109         { "ogv",  "ogg" },
 110         { "ogx",  "ogg" }, /*RFC5334*/
 111         { "opus", "ogg" }, /*draft-terriberry-oggopus-01*/
 112         { "pva",  "pva" },
 113         { "rm",   "avformat" },
 114         { "rmi",  "smf" },
 115         { "spx",  "ogg" },
 116         { "voc",  "voc" },
 117         { "wma",  "asf" },
 118         { "wmv",  "asf" },
 119     };
 120
 121     /* Here, we don't mind if it does not work, it must be quick */
 122     static demux_mapping quick[] =
 123     { /* NOTE: shall be sorted in asc order */
 124         { "mp3", "mpga" },
 125         { "ogg", "ogg" },
 126         { "wma", "asf" },
 127     };
 128
 129     struct {
 130         demux_mapping* data;
 131         size_t size;
 132
 133     } lookup = {
 134         .data = b_preparsing ? quick : strong,
 135         .size = b_preparsing ? ARRAY_SIZE( quick ) : ARRAY_SIZE( strong )
 136     };
 137
 138     demux_mapping* result = demux_lookup( ext, lookup.data, lookup.size );
 139     return result ? result->name : NULL;
 140 }
 141
 142 demux_t *demux_New( vlc_object_t *p_obj, const char *psz_name,
 143                     stream_t *s, es_out_t *out )
 144 {
 145     assert(s != NULL );
 146     return demux_NewAdvanced( p_obj, NULL, psz_name, "", s, out, false );
 147 }
 148
 149 struct vlc_demux_private
 150 {
 151     module_t *module;
 152 };
 153
 154 static void demux_DestroyDemux(demux_t *demux)
 155 {
 156     struct vlc_demux_private *priv = vlc_stream_Private(demux);
 157
 158     module_unneed(demux, priv->module);
 159     free(demux->psz_filepath);
 160     free(demux->psz_name);
 161
 162     assert(demux->s != NULL);
 163     vlc_stream_Delete(demux->s);
 164 }
 165
 166 static int demux_Probe(void *func, va_list ap)
 167 {
 168     int (*probe)(vlc_object_t *) = func;
 169     demux_t *demux = va_arg(ap, demux_t *);
 170
 171     /* Restore input stream offset (in case previous probed demux failed to
 172      * to do so). */
 173     if (vlc_stream_Tell(demux->s) != 0 && vlc_stream_Seek(demux->s, 0))
 174     {
 175         msg_Err(demux, "seek failure before probing");
 176         return VLC_EGENERIC;
 177     }
 178
 179     return probe(VLC_OBJECT(demux));
 180 }
 181
 182 demux_t *demux_NewAdvanced( vlc_object_t *p_obj, input_thread_t *p_input,
 183                             const char *psz_demux, const char *url,
 184                             stream_t *s, es_out_t *out, bool b_preparsing )
 185 {
 186     struct vlc_demux_private *priv;
 187     demux_t *p_demux = vlc_stream_CustomNew(p_obj, demux_DestroyDemux,
 188                                             sizeof (*priv), "demux");
 189
 190     if (unlikely(p_demux == NULL))
 191         return NULL;
 192
 193     assert(s != NULL);
 194     priv = vlc_stream_Private(p_demux);
 195
 196     if (!strcasecmp( psz_demux, "any" ) || !psz_demux[0])
 197     {   /* Look up demux by mime-type for hard to detect formats */
 198         char *type = stream_MimeType( s );
 199         if( type != NULL )
 200         {
 201             psz_demux = demux_NameFromMimeType( type );
 202             free( type );
 203         }
 204     }
 205
 206     p_demux->p_input_item = p_input ? input_GetItem(p_input) : NULL;
 207     p_demux->psz_name = strdup( psz_demux );
 208     if (unlikely(p_demux->psz_name == NULL))
 209         goto error;
 210
 211     p_demux->psz_url = strdup(url);
 212     if (unlikely(p_demux->psz_url == NULL))
 213         goto error;
 214
 215     const char *p = strstr(p_demux->psz_url, "://");
 216     p_demux->psz_location = (p != NULL) ? (p + 3) : "";
 217     p_demux->psz_filepath = get_path(p_demux->psz_location); /* parse URL */
 218
 219     if( !b_preparsing )
 220         msg_Dbg( p_obj, "creating demux \"%s\", URL: %s, path: %s",
 221                  psz_demux, url, p_demux->psz_filepath );
 222
 223     p_demux->s              = s;
 224     p_demux->out            = out;
 225     p_demux->b_preparsing   = b_preparsing;
 226
 227     p_demux->pf_demux   = NULL;
 228     p_demux->pf_control = NULL;
 229     p_demux->p_sys      = NULL;
 230
 231     const char *psz_module = NULL;
 232
 233     if( !strcmp( p_demux->psz_name, "any" ) && p_demux->psz_filepath )
 234     {
 235         char const* psz_ext = strrchr( p_demux->psz_filepath, '.' );
 236
 237         if( psz_ext )
 238             psz_module = DemuxNameFromExtension( psz_ext + 1, b_preparsing );
 239     }
 240
 241     if( psz_module == NULL )
 242         psz_module = p_demux->psz_name;
 243
 244     priv->module = vlc_module_load(p_demux, "demux", psz_module,
 245         !strcmp(psz_module, p_demux->psz_name), demux_Probe, p_demux);
 246
 247     if (priv->module == NULL)
 248     {
 249         free( p_demux->psz_filepath );
 250         goto error;
 251     }
 252
 253     return p_demux;
 254 error:
 255     free( p_demux->psz_name );
 256     stream_CommonDelete( p_demux );
 257     return NULL;
 258 }
 259
 260 #define static_control_match(foo) \
 261     static_assert((unsigned) DEMUX_##foo == STREAM_##foo, "Mismatch")
 262
 263 int demux_vaControl( demux_t *demux, int query, va_list args )
 264 {
 265     return demux->pf_control( demux, query, args );
 266 }
 267
 268 /*****************************************************************************
 269  * demux_vaControlHelper:
 270  *****************************************************************************/
 271 int demux_vaControlHelper( stream_t *s,
 272                             int64_t i_start, int64_t i_end,
 273                             int64_t i_bitrate, int i_align,
 274                             int i_query, va_list args )
 275 {
 276     int64_t i_tell;
 277     double  f, *pf;
 278     vlc_tick_t i64;
 279
 280     if( i_end < 0 )    i_end   = stream_Size( s );
 281     if( i_start < 0 )  i_start = 0;
 282     if( i_align <= 0 ) i_align = 1;
 283     i_tell = vlc_stream_Tell( s );
 284
 285     static_control_match(CAN_PAUSE);
 286     static_control_match(CAN_CONTROL_PACE);
 287     static_control_match(GET_PTS_DELAY);
 288     static_control_match(GET_META);
 289     static_control_match(GET_SIGNAL);
 290     static_control_match(SET_PAUSE_STATE);
 291
 292     switch( i_query )
 293     {
 294         case DEMUX_CAN_SEEK:
 295         {
 296             bool *b = va_arg( args, bool * );
 297
 298             if( (i_bitrate <= 0 && i_start >= i_end)
 299              || vlc_stream_Control( s, STREAM_CAN_SEEK, b ) )
 300                 *b = false;
 301             break;
 302         }
 303
 304         case DEMUX_CAN_PAUSE:
 305         case DEMUX_CAN_CONTROL_PACE:
 306         case DEMUX_GET_PTS_DELAY:
 307         case DEMUX_GET_META:
 308         case DEMUX_GET_SIGNAL:
 309         case DEMUX_SET_PAUSE_STATE:
 310             return vlc_stream_vaControl( s, i_query, args );
 311
 312         case DEMUX_GET_LENGTH:
 313             if( i_bitrate > 0 && i_end > i_start )
 314             {
 315                 *va_arg( args, vlc_tick_t * ) = INT64_C(8000000) * (i_end - i_start) / i_bitrate;
 316                 return VLC_SUCCESS;
 317             }
 318             return VLC_EGENERIC;
 319
 320         case DEMUX_GET_TIME:
 321             if( i_bitrate > 0 && i_tell >= i_start )
 322             {
 323                 *va_arg( args, vlc_tick_t * ) = INT64_C(8000000) * (i_tell - i_start) / i_bitrate;
 324                 return VLC_SUCCESS;
 325             }
 326             return VLC_EGENERIC;
 327
 328         case DEMUX_GET_POSITION:
 329             pf = va_arg( args, double * );
 330             if( i_start < i_end )
 331             {
 332                 *pf = (double)( i_tell - i_start ) /
 333                       (double)( i_end  - i_start );
 334                 return VLC_SUCCESS;
 335             }
 336             return VLC_EGENERIC;
 337
 338
 339         case DEMUX_SET_POSITION:
 340             f = va_arg( args, double );
 341             if( i_start < i_end && f >= 0.0 && f <= 1.0 )
 342             {
 343                 int64_t i_block = (f * ( i_end - i_start )) / i_align;
 344
 345                 if( vlc_stream_Seek( s, i_start + i_block * i_align ) )
 346                 {
 347                     return VLC_EGENERIC;
 348                 }
 349                 return VLC_SUCCESS;
 350             }
 351             return VLC_EGENERIC;
 352
 353         case DEMUX_SET_TIME:
 354             i64 = va_arg( args, vlc_tick_t );
 355             if( i_bitrate > 0 && i64 >= 0 )
 356             {
 357                 int64_t i_block = i64 * i_bitrate / INT64_C(8000000) / i_align;
 358                 if( vlc_stream_Seek( s, i_start + i_block * i_align ) )
 359                 {
 360                     return VLC_EGENERIC;
 361                 }
 362                 return VLC_SUCCESS;
 363             }
 364             return VLC_EGENERIC;
 365
 366         case DEMUX_IS_PLAYLIST:
 367             *va_arg( args, bool * ) = false;
 368             return VLC_SUCCESS;
 369
 370         case DEMUX_GET_FPS:
 371         case DEMUX_HAS_UNSUPPORTED_META:
 372         case DEMUX_SET_NEXT_DEMUX_TIME:
 373         case DEMUX_GET_TITLE_INFO:
 374         case DEMUX_SET_GROUP_DEFAULT:
 375         case DEMUX_SET_GROUP_ALL:
 376         case DEMUX_SET_GROUP_LIST:
 377         case DEMUX_SET_ES:
 378         case DEMUX_GET_ATTACHMENTS:
 379         case DEMUX_CAN_RECORD:
 380         case DEMUX_TEST_AND_CLEAR_FLAGS:
 381         case DEMUX_GET_TITLE:
 382         case DEMUX_GET_SEEKPOINT:
 383         case DEMUX_NAV_ACTIVATE:
 384         case DEMUX_NAV_UP:
 385         case DEMUX_NAV_DOWN:
 386         case DEMUX_NAV_LEFT:
 387         case DEMUX_NAV_RIGHT:
 388         case DEMUX_NAV_POPUP:
 389         case DEMUX_NAV_MENU:
 390         case DEMUX_FILTER_ENABLE:
 391         case DEMUX_FILTER_DISABLE:
 392             return VLC_EGENERIC;
 393
 394         case DEMUX_SET_TITLE:
 395         case DEMUX_SET_SEEKPOINT:
 396         case DEMUX_SET_RECORD_STATE:
 397             assert(0);
 398         default:
 399             msg_Err( s, "unknown query 0x%x in %s", i_query, __func__ );
 400             return VLC_EGENERIC;
 401     }
 402     return VLC_SUCCESS;
 403 }
 404
 405 /****************************************************************************
 406  * Utility functions
 407  ****************************************************************************/
 408 decoder_t *demux_PacketizerNew( demux_t *p_demux, es_format_t *p_fmt, const char *psz_msg )
 409 {
 410     decoder_t *p_packetizer;
 411     p_packetizer = vlc_custom_create( p_demux, sizeof( *p_packetizer ),
 412                                       "demux packetizer" );
 413     if( !p_packetizer )
 414     {
 415         es_format_Clean( p_fmt );
 416         return NULL;
 417     }
 418     p_fmt->b_packetized = false;
 419
 420     p_packetizer->pf_decode = NULL;
 421     p_packetizer->pf_packetize = NULL;
 422
 423     p_packetizer->fmt_in = *p_fmt;
 424     es_format_Init( &p_packetizer->fmt_out, p_fmt->i_cat, 0 );
 425
 426     p_packetizer->p_module = module_need( p_packetizer, "packetizer", NULL, false );
 427     if( !p_packetizer->p_module )
 428     {
 429         es_format_Clean( p_fmt );
 430         vlc_object_release( p_packetizer );
 431         msg_Err( p_demux, "cannot find packetizer for %s", psz_msg );
 432         return NULL;
 433     }
 434
 435     return p_packetizer;
 436 }
 437
 438 void demux_PacketizerDestroy( decoder_t *p_packetizer )
 439 {
 440     if( p_packetizer->p_module )
 441         module_unneed( p_packetizer, p_packetizer->p_module );
 442     es_format_Clean( &p_packetizer->fmt_in );
 443     es_format_Clean( &p_packetizer->fmt_out );
 444     if( p_packetizer->p_description )
 445         vlc_meta_Delete( p_packetizer->p_description );
 446     vlc_object_release( p_packetizer );
 447 }
 448
 449 unsigned demux_TestAndClearFlags( demux_t *p_demux, unsigned flags )
 450 {
 451     unsigned update = flags;
 452
 453     if (demux_Control( p_demux, DEMUX_TEST_AND_CLEAR_FLAGS, &update))
 454         return 0;
 455     return update;
 456 }
 457
 458 int demux_GetTitle( demux_t *p_demux )
 459 {
 460     int title;
 461
 462     if (demux_Control(p_demux, DEMUX_GET_TITLE, &title))
 463         title = 0;
 464     return title;
 465 }
 466
 467 int demux_GetSeekpoint( demux_t *p_demux )
 468 {
 469     int seekpoint;
 470
 471     if (demux_Control(p_demux, DEMUX_GET_SEEKPOINT, &seekpoint))
 472         seekpoint = 0;
 473     return seekpoint;
 474 }
 475
 476 static demux_t *demux_FilterNew( demux_t *p_next, const char *p_name )
 477 {
 478     struct vlc_demux_private *priv;
 479     demux_t *p_demux = vlc_stream_CustomNew(VLC_OBJECT(p_next),
 480                                             demux_DestroyDemux, sizeof (*priv),
 481                                             "demux filter");
 482     if (unlikely(p_demux == NULL))
 483         return NULL;
 484
 485     priv = vlc_stream_Private(p_demux);
 486     p_demux->p_next       = p_next;
 487     p_demux->p_input_item = NULL;
 488     p_demux->p_sys        = NULL;
 489     p_demux->psz_name     = NULL;
 490     p_demux->psz_url      = NULL;
 491     p_demux->psz_location = NULL;
 492     p_demux->psz_filepath = NULL;
 493     p_demux->out          = NULL;
 494
 495     priv->module = module_need(p_demux, "demux_filter", p_name,
 496                                p_name != NULL);
 497     if (priv->module == NULL)
 498         goto error;
 499
 500     return p_demux;
 501 error:
 502     stream_CommonDelete( p_demux );
 503     return NULL;
 504 }
 505
 506 demux_t *demux_FilterChainNew( demux_t *p_demux, const char *psz_chain )
 507 {
 508     if( !psz_chain || !*psz_chain )
 509         return NULL;
 510
 511     char *psz_parser = strdup(psz_chain);
 512     if(!psz_parser)
 513         return NULL;
 514
 515     /* parse chain */
 516     while(psz_parser)
 517     {
 518         config_chain_t *p_cfg;
 519         char *psz_name;
 520         char *psz_rest_chain = config_ChainCreate( &psz_name, &p_cfg, psz_parser );
 521         free( psz_parser );
 522         psz_parser = psz_rest_chain;
 523
 524         demux_t *filter = demux_FilterNew(p_demux, psz_name);
 525         if (filter != NULL)
 526             p_demux = filter;
 527
 528         free(psz_name);
 529         config_ChainDestroy(p_cfg);
 530     }
 531
 532     return p_demux;
 533 }
 534
 535 static bool demux_filter_enable_disable(demux_t *p_demux,
 536                                         const char *psz_demux, bool b_enable)
 537 {
 538     struct vlc_demux_private *priv = vlc_stream_Private(p_demux);
 539
 540     if ( psz_demux &&
 541         (strcmp(module_get_name(priv->module, false), psz_demux) == 0
 542       || strcmp(module_get_name(priv->module, true), psz_demux) == 0) )
 543     {
 544         demux_Control( p_demux,
 545                        b_enable ? DEMUX_FILTER_ENABLE : DEMUX_FILTER_DISABLE );
 546         return true;
 547     }
 548     return false;
 549 }
 550
 551 bool demux_FilterEnable( demux_t *p_demux_chain, const char* psz_demux )
 552 {
 553     return demux_filter_enable_disable( p_demux_chain, psz_demux, true );
 554 }
 555
 556 bool demux_FilterDisable( demux_t *p_demux_chain, const char* psz_demux )
 557 {
 558     return demux_filter_enable_disable( p_demux_chain, psz_demux, false );
 559 }