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_url.h>
  36 #include <vlc_modules.h>
  37 #include <vlc_strings.h>
  38
  39 typedef const struct
  40 {
  41     char const key[20];
  42     char const name[8];
  43
  44 } demux_mapping;
  45
  46 static int demux_mapping_cmp( const void *k, const void *v )
  47 {
  48     demux_mapping* entry = v;
  49     return vlc_ascii_strcasecmp( k, entry->key );
  50 }
  51
  52 static demux_mapping* demux_lookup( char const* key,
  53                                     demux_mapping* data, size_t size )
  54 {
  55     return bsearch( key, data, size, sizeof( *data ), demux_mapping_cmp );
  56 }
  57
  58 static const char *demux_NameFromMimeType(const char *mime)
  59 {
  60     static demux_mapping types[] =
  61     {   /* Must be sorted in ascending ASCII order */
  62         { "audio/aac",           "m4a"     },
  63         { "audio/aacp",          "m4a"     },
  64         { "audio/mpeg",          "mp3"     },
  65         //{ "video/MP1S",          "es,mpgv" }, !b_force
  66         { "video/dv",            "rawdv"   },
  67         { "video/MP2P",          "ps"      },
  68         { "video/MP2T",          "ts"      },
  69         { "video/nsa",           "nsv"     },
  70         { "video/nsv",           "nsv"     },
  71     };
  72     demux_mapping *type = demux_lookup( mime, types, ARRAY_SIZE( types ) );
  73     return (type != NULL) ? type->name : "any";
  74 }
  75
  76 static const char* DemuxNameFromExtension( char const* ext,
  77                                            bool b_preparsing )
  78 {
  79     /* NOTE: Add only file without any problems here and with strong detection:
  80      * - no .mp3, .a52, ...
  81      *  - wav can't be added 'cause of a52 and dts in them as raw audio
  82      */
  83     static demux_mapping strong[] =
  84     { /* NOTE: must be sorted in asc order */
  85         { "aiff", "aiff" },
  86         { "asf",  "asf" },
  87         { "au",   "au" },
  88         { "avi",  "avi" },
  89         { "drc",  "dirac" },
  90         { "dv",   "dv" },
  91         { "flac", "flac" },
  92         { "h264", "h264" },
  93         { "kar", "smf" },
  94         { "m3u",  "m3u" },
  95         { "m4a",  "mp4" },
  96         { "m4v",  "m4v" },
  97         { "mid",  "smf" },
  98         { "mka",  "mkv" },
  99         { "mks",  "mkv" },
 100         { "mkv",  "mkv" },
 101         { "moov", "mp4" },
 102         { "mov",  "mp4" },
 103         { "mp4",  "mp4" },
 104         { "nsv",  "nsv" },
 105         { "oga",  "ogg" },
 106         { "ogg",  "ogg" },
 107         { "ogm",  "ogg" },
 108         { "ogv",  "ogg" },
 109         { "ogx",  "ogg" }, /*RFC5334*/
 110         { "opus", "ogg" }, /*draft-terriberry-oggopus-01*/
 111         { "pva",  "pva" },
 112         { "rm",   "avformat" },
 113         { "rmi",  "smf" },
 114         { "spx",  "ogg" },
 115         { "voc",  "voc" },
 116         { "wma",  "asf" },
 117         { "wmv",  "asf" },
 118     };
 119
 120     /* Here, we don't mind if it does not work, it must be quick */
 121     static demux_mapping quick[] =
 122     { /* NOTE: shall be sorted in asc order */
 123         { "mp3", "mpga" },
 124         { "ogg", "ogg" },
 125         { "wma", "asf" },
 126     };
 127
 128     struct {
 129         demux_mapping* data;
 130         size_t size;
 131
 132     } lookup = {
 133         .data = b_preparsing ? quick : strong,
 134         .size = b_preparsing ? ARRAY_SIZE( quick ) : ARRAY_SIZE( strong )
 135     };
 136
 137     demux_mapping* result = demux_lookup( ext, lookup.data, lookup.size );
 138     return result ? result->name : NULL;
 139 }
 140
 141 demux_t *demux_New( vlc_object_t *p_obj, const char *psz_name,
 142                     stream_t *s, es_out_t *out )
 143 {
 144     assert(s != NULL );
 145     return demux_NewAdvanced( p_obj, NULL, psz_name, "", s, out, false );
 146 }
 147
 148 struct vlc_demux_private
 149 {
 150     module_t *module;
 151 };
 152
 153 static void demux_DestroyDemux(demux_t *demux)
 154 {
 155     struct vlc_demux_private *priv = vlc_stream_Private(demux);
 156
 157     module_unneed(demux, priv->module);
 158     free(demux->psz_filepath);
 159     free(demux->psz_name);
 160
 161     assert(demux->s != NULL);
 162     vlc_stream_Delete(demux->s);
 163 }
 164
 165 static int demux_Probe(void *func, va_list ap)
 166 {
 167     int (*probe)(vlc_object_t *) = func;
 168     demux_t *demux = va_arg(ap, demux_t *);
 169
 170     /* Restore input stream offset (in case previous probed demux failed to
 171      * to do so). */
 172     if (vlc_stream_Tell(demux->s) != 0 && vlc_stream_Seek(demux->s, 0))
 173     {
 174         msg_Err(demux, "seek failure before probing");
 175         return VLC_EGENERIC;
 176     }
 177
 178     return probe(VLC_OBJECT(demux));
 179 }
 180
 181 demux_t *demux_NewAdvanced( vlc_object_t *p_obj, input_thread_t *p_parent_input,
 182                             const char *psz_demux, const char *url,
 183                             stream_t *s, es_out_t *out, bool b_preparsing )
 184 {
 185     struct vlc_demux_private *priv;
 186     demux_t *p_demux = vlc_stream_CustomNew(p_obj, demux_DestroyDemux,
 187                                             sizeof (*priv), "demux");
 188
 189     if (unlikely(p_demux == NULL))
 190         return NULL;
 191
 192     assert(s != NULL);
 193     priv = vlc_stream_Private(p_demux);
 194
 195     if (!strcasecmp( psz_demux, "any" ) || !psz_demux[0])
 196     {   /* Look up demux by mime-type for hard to detect formats */
 197         char *type = stream_MimeType( s );
 198         if( type != NULL )
 199         {
 200             psz_demux = demux_NameFromMimeType( type );
 201             free( type );
 202         }
 203     }
 204
 205     p_demux->p_input = p_parent_input;
 206     p_demux->psz_name = strdup( psz_demux );
 207     if (unlikely(p_demux->psz_name == NULL))
 208         goto error;
 209
 210     p_demux->psz_url = strdup(url);
 211     if (unlikely(p_demux->psz_url == NULL))
 212         goto error;
 213
 214     const char *p = strstr(p_demux->psz_url, "://");
 215     p_demux->psz_location = (p != NULL) ? (p + 3) : "";
 216     p_demux->psz_filepath = get_path(p_demux->psz_location); /* parse URL */
 217
 218     if( !b_preparsing )
 219         msg_Dbg( p_obj, "creating demux \"%s\", URL: %s, path: %s",
 220                  psz_demux, url, p_demux->psz_filepath );
 221
 222     p_demux->s              = s;
 223     p_demux->out            = out;
 224     p_demux->b_preparsing   = b_preparsing;
 225
 226     p_demux->pf_demux   = NULL;
 227     p_demux->pf_control = NULL;
 228     p_demux->p_sys      = NULL;
 229
 230     const char *psz_module = NULL;
 231
 232     if( !strcmp( p_demux->psz_name, "any" ) && p_demux->psz_filepath )
 233     {
 234         char const* psz_ext = strrchr( p_demux->psz_filepath, '.' );
 235
 236         if( psz_ext )
 237             psz_module = DemuxNameFromExtension( psz_ext + 1, b_preparsing );
 238     }
 239
 240     if( psz_module == NULL )
 241         psz_module = p_demux->psz_name;
 242
 243     priv->module = vlc_module_load(p_demux, "demux", psz_module,
 244         !strcmp(psz_module, p_demux->psz_name), demux_Probe, p_demux);
 245
 246     if (priv->module == NULL)
 247     {
 248         free( p_demux->psz_filepath );
 249         goto error;
 250     }
 251
 252     return p_demux;
 253 error:
 254     free( p_demux->psz_name );
 255     stream_CommonDelete( p_demux );
 256     return NULL;
 257 }
 258
 259 #define static_control_match(foo) \
 260     static_assert((unsigned) DEMUX_##foo == STREAM_##foo, "Mismatch")
 261
 262 int demux_vaControl( demux_t *demux, int query, va_list args )
 263 {
 264     return demux->pf_control( demux, query, args );
 265 }
 266
 267 /*****************************************************************************
 268  * demux_vaControlHelper:
 269  *****************************************************************************/
 270 int demux_vaControlHelper( stream_t *s,
 271                             int64_t i_start, int64_t i_end,
 272                             int64_t i_bitrate, int i_align,
 273                             int i_query, va_list args )
 274 {
 275     int64_t i_tell;
 276     double  f, *pf;
 277     int64_t i64, *pi64;
 278
 279     if( i_end < 0 )    i_end   = stream_Size( s );
 280     if( i_start < 0 )  i_start = 0;
 281     if( i_align <= 0 ) i_align = 1;
 282     i_tell = vlc_stream_Tell( s );
 283
 284     static_control_match(CAN_PAUSE);
 285     static_control_match(CAN_CONTROL_PACE);
 286     static_control_match(GET_PTS_DELAY);
 287     static_control_match(GET_META);
 288     static_control_match(GET_SIGNAL);
 289     static_control_match(SET_PAUSE_STATE);
 290
 291     switch( i_query )
 292     {
 293         case DEMUX_CAN_SEEK:
 294         {
 295             bool *b = va_arg( args, bool * );
 296
 297             if( (i_bitrate <= 0 && i_start >= i_end)
 298              || vlc_stream_Control( s, STREAM_CAN_SEEK, b ) )
 299                 *b = false;
 300             break;
 301         }
 302
 303         case DEMUX_CAN_PAUSE:
 304         case DEMUX_CAN_CONTROL_PACE:
 305         case DEMUX_GET_PTS_DELAY:
 306         case DEMUX_GET_META:
 307         case DEMUX_GET_SIGNAL:
 308         case DEMUX_SET_PAUSE_STATE:
 309             return vlc_stream_vaControl( s, i_query, args );
 310
 311         case DEMUX_GET_LENGTH:
 312             pi64 = (int64_t*)va_arg( args, int64_t * );
 313             if( i_bitrate > 0 && i_end > i_start )
 314             {
 315                 *pi64 = 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             pi64 = (int64_t*)va_arg( args, int64_t * );
 322             if( i_bitrate > 0 && i_tell >= i_start )
 323             {
 324                 *pi64 = INT64_C(8000000) * (i_tell - i_start) / i_bitrate;
 325                 return VLC_SUCCESS;
 326             }
 327             return VLC_EGENERIC;
 328
 329         case DEMUX_GET_POSITION:
 330             pf = (double*)va_arg( args, double * );
 331             if( i_start < i_end )
 332             {
 333                 *pf = (double)( i_tell - i_start ) /
 334                       (double)( i_end  - i_start );
 335                 return VLC_SUCCESS;
 336             }
 337             return VLC_EGENERIC;
 338
 339
 340         case DEMUX_SET_POSITION:
 341             f = (double)va_arg( args, double );
 342             if( i_start < i_end && f >= 0.0 && f <= 1.0 )
 343             {
 344                 int64_t i_block = (f * ( i_end - i_start )) / i_align;
 345
 346                 if( vlc_stream_Seek( s, i_start + i_block * i_align ) )
 347                 {
 348                     return VLC_EGENERIC;
 349                 }
 350                 return VLC_SUCCESS;
 351             }
 352             return VLC_EGENERIC;
 353
 354         case DEMUX_SET_TIME:
 355             i64 = (int64_t)va_arg( args, int64_t );
 356             if( i_bitrate > 0 && i64 >= 0 )
 357             {
 358                 int64_t i_block = i64 * i_bitrate / INT64_C(8000000) / i_align;
 359                 if( vlc_stream_Seek( s, i_start + i_block * i_align ) )
 360                 {
 361                     return VLC_EGENERIC;
 362                 }
 363                 return VLC_SUCCESS;
 364             }
 365             return VLC_EGENERIC;
 366
 367         case DEMUX_IS_PLAYLIST:
 368             *va_arg( args, bool * ) = false;
 369             return VLC_SUCCESS;
 370
 371         case DEMUX_GET_FPS:
 372         case DEMUX_HAS_UNSUPPORTED_META:
 373         case DEMUX_SET_NEXT_DEMUX_TIME:
 374         case DEMUX_GET_TITLE_INFO:
 375         case DEMUX_SET_GROUP:
 376         case DEMUX_SET_ES:
 377         case DEMUX_GET_ATTACHMENTS:
 378         case DEMUX_CAN_RECORD:
 379         case DEMUX_TEST_AND_CLEAR_FLAGS:
 380         case DEMUX_GET_TITLE:
 381         case DEMUX_GET_SEEKPOINT:
 382         case DEMUX_NAV_ACTIVATE:
 383         case DEMUX_NAV_UP:
 384         case DEMUX_NAV_DOWN:
 385         case DEMUX_NAV_LEFT:
 386         case DEMUX_NAV_RIGHT:
 387         case DEMUX_NAV_POPUP:
 388         case DEMUX_NAV_MENU:
 389         case DEMUX_FILTER_ENABLE:
 390         case DEMUX_FILTER_DISABLE:
 391             return VLC_EGENERIC;
 392
 393         case DEMUX_SET_TITLE:
 394         case DEMUX_SET_SEEKPOINT:
 395         case DEMUX_SET_RECORD_STATE:
 396             assert(0);
 397         default:
 398             msg_Err( s, "unknown query 0x%x in %s", i_query, __func__ );
 399             return VLC_EGENERIC;
 400     }
 401     return VLC_SUCCESS;
 402 }
 403
 404 /****************************************************************************
 405  * Utility functions
 406  ****************************************************************************/
 407 decoder_t *demux_PacketizerNew( demux_t *p_demux, es_format_t *p_fmt, const char *psz_msg )
 408 {
 409     decoder_t *p_packetizer;
 410     p_packetizer = vlc_custom_create( p_demux, sizeof( *p_packetizer ),
 411                                       "demux packetizer" );
 412     if( !p_packetizer )
 413     {
 414         es_format_Clean( p_fmt );
 415         return NULL;
 416     }
 417     p_fmt->b_packetized = false;
 418
 419     p_packetizer->pf_decode = NULL;
 420     p_packetizer->pf_packetize = NULL;
 421
 422     p_packetizer->fmt_in = *p_fmt;
 423     es_format_Init( &p_packetizer->fmt_out, p_fmt->i_cat, 0 );
 424
 425     p_packetizer->p_module = module_need( p_packetizer, "packetizer", NULL, false );
 426     if( !p_packetizer->p_module )
 427     {
 428         es_format_Clean( p_fmt );
 429         vlc_object_release( p_packetizer );
 430         msg_Err( p_demux, "cannot find packetizer for %s", psz_msg );
 431         return NULL;
 432     }
 433
 434     return p_packetizer;
 435 }
 436
 437 void demux_PacketizerDestroy( decoder_t *p_packetizer )
 438 {
 439     if( p_packetizer->p_module )
 440         module_unneed( p_packetizer, p_packetizer->p_module );
 441     es_format_Clean( &p_packetizer->fmt_in );
 442     es_format_Clean( &p_packetizer->fmt_out );
 443     if( p_packetizer->p_description )
 444         vlc_meta_Delete( p_packetizer->p_description );
 445     vlc_object_release( p_packetizer );
 446 }
 447
 448 unsigned demux_TestAndClearFlags( demux_t *p_demux, unsigned flags )
 449 {
 450     unsigned update = flags;
 451
 452     if (demux_Control( p_demux, DEMUX_TEST_AND_CLEAR_FLAGS, &update))
 453         return 0;
 454     return update;
 455 }
 456
 457 int demux_GetTitle( demux_t *p_demux )
 458 {
 459     int title;
 460
 461     if (demux_Control(p_demux, DEMUX_GET_TITLE, &title))
 462         title = 0;
 463     return title;
 464 }
 465
 466 int demux_GetSeekpoint( demux_t *p_demux )
 467 {
 468     int seekpoint;
 469
 470     if (demux_Control(p_demux, DEMUX_GET_SEEKPOINT, &seekpoint))
 471         seekpoint = 0;
 472     return seekpoint;
 473 }
 474
 475 static demux_t *demux_FilterNew( demux_t *p_next, const char *p_name )
 476 {
 477     struct vlc_demux_private *priv;
 478     demux_t *p_demux = vlc_stream_CustomNew(VLC_OBJECT(p_next),
 479                                             demux_DestroyDemux, sizeof (*priv),
 480                                             "demux filter");
 481     if (unlikely(p_demux == NULL))
 482         return NULL;
 483
 484     priv = vlc_stream_Private(p_demux);
 485     p_demux->p_next       = p_next;
 486     p_demux->p_input      = NULL;
 487     p_demux->p_sys        = NULL;
 488     p_demux->psz_name     = NULL;
 489     p_demux->psz_url      = NULL;
 490     p_demux->psz_location = NULL;
 491     p_demux->psz_filepath = NULL;
 492     p_demux->out          = NULL;
 493
 494     priv->module = module_need(p_demux, "demux_filter", p_name,
 495                                p_name != NULL);
 496     if (priv->module == NULL)
 497         goto error;
 498
 499     return p_demux;
 500 error:
 501     stream_CommonDelete( p_demux );
 502     return NULL;
 503 }
 504
 505 demux_t *demux_FilterChainNew( demux_t *p_demux, const char *psz_chain )
 506 {
 507     if( !psz_chain || !*psz_chain )
 508         return NULL;
 509
 510     char *psz_parser = strdup(psz_chain);
 511     if(!psz_parser)
 512         return NULL;
 513
 514     /* parse chain */
 515     while(psz_parser)
 516     {
 517         config_chain_t *p_cfg;
 518         char *psz_name;
 519         char *psz_rest_chain = config_ChainCreate( &psz_name, &p_cfg, psz_parser );
 520         free( psz_parser );
 521         psz_parser = psz_rest_chain;
 522
 523         demux_t *filter = demux_FilterNew(p_demux, psz_name);
 524         if (filter != NULL)
 525             p_demux = filter;
 526
 527         free(psz_name);
 528         config_ChainDestroy(p_cfg);
 529     }
 530
 531     return p_demux;
 532 }
 533
 534 static bool demux_filter_enable_disable(demux_t *p_demux,
 535                                         const char *psz_demux, bool b_enable)
 536 {
 537     struct vlc_demux_private *priv = vlc_stream_Private(p_demux);
 538
 539     if (strcmp(module_get_name(priv->module, false), psz_demux) == 0
 540      || strcmp(module_get_name(priv->module, true), psz_demux) == 0)
 541     {
 542         demux_Control( p_demux,
 543                        b_enable ? DEMUX_FILTER_ENABLE : DEMUX_FILTER_DISABLE );
 544         return true;
 545     }
 546     return false;
 547 }
 548
 549 bool demux_FilterEnable( demux_t *p_demux_chain, const char* psz_demux )
 550 {
 551     return demux_filter_enable_disable( p_demux_chain, psz_demux, true );
 552 }
 553
 554 bool demux_FilterDisable( demux_t *p_demux_chain, const char* psz_demux )
 555 {
 556     return demux_filter_enable_disable( p_demux_chain, psz_demux, false );
 557 }