git.sesse.net Git - vlc/blob - src/control/media.c

   1 /*****************************************************************************
   2  * media.c: Libvlc API media descripor management
   3  *****************************************************************************
   4  * Copyright (C) 2007 the VideoLAN team
   5  * $Id$
   6  *
   7  * Authors: Pierre d'Herbemont <pdherbemont@videolan.org>
   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 <assert.h>
  29
  30 #include <vlc/libvlc.h>
  31 #include <vlc/libvlc_media.h>
  32 #include <vlc/libvlc_media_list.h> // For the subitems, here for convenience
  33 #include <vlc/libvlc_events.h>
  34
  35 #include <vlc_common.h>
  36 #include <vlc_input.h>
  37 #include <vlc_meta.h>
  38 #include <vlc_playlist.h> /* For the preparser */
  39 #include <vlc_url.h>
  40
  41 #include "libvlc.h"
  42
  43 #include "libvlc_internal.h"
  44 #include "media_internal.h"
  45
  46 static const vlc_meta_type_t libvlc_to_vlc_meta[] =
  47 {
  48     [libvlc_meta_Title]        = vlc_meta_Title,
  49     [libvlc_meta_Artist]       = vlc_meta_Artist,
  50     [libvlc_meta_Genre]        = vlc_meta_Genre,
  51     [libvlc_meta_Copyright]    = vlc_meta_Copyright,
  52     [libvlc_meta_Album]        = vlc_meta_Album,
  53     [libvlc_meta_TrackNumber]  = vlc_meta_TrackNumber,
  54     [libvlc_meta_Description]  = vlc_meta_Description,
  55     [libvlc_meta_Rating]       = vlc_meta_Rating,
  56     [libvlc_meta_Date]         = vlc_meta_Date,
  57     [libvlc_meta_Setting]      = vlc_meta_Setting,
  58     [libvlc_meta_URL]          = vlc_meta_URL,
  59     [libvlc_meta_Language]     = vlc_meta_Language,
  60     [libvlc_meta_NowPlaying]   = vlc_meta_NowPlaying,
  61     [libvlc_meta_Publisher]    = vlc_meta_Publisher,
  62     [libvlc_meta_EncodedBy]    = vlc_meta_EncodedBy,
  63     [libvlc_meta_ArtworkURL]   = vlc_meta_ArtworkURL,
  64     [libvlc_meta_TrackID]      = vlc_meta_TrackID
  65 };
  66
  67 static const libvlc_meta_t vlc_to_libvlc_meta[] =
  68 {
  69     [vlc_meta_Title]        = libvlc_meta_Title,
  70     [vlc_meta_Artist]       = libvlc_meta_Artist,
  71     [vlc_meta_Genre]        = libvlc_meta_Genre,
  72     [vlc_meta_Copyright]    = libvlc_meta_Copyright,
  73     [vlc_meta_Album]        = libvlc_meta_Album,
  74     [vlc_meta_TrackNumber]  = libvlc_meta_TrackNumber,
  75     [vlc_meta_Description]  = libvlc_meta_Description,
  76     [vlc_meta_Rating]       = libvlc_meta_Rating,
  77     [vlc_meta_Date]         = libvlc_meta_Date,
  78     [vlc_meta_Setting]      = libvlc_meta_Setting,
  79     [vlc_meta_URL]          = libvlc_meta_URL,
  80     [vlc_meta_Language]     = libvlc_meta_Language,
  81     [vlc_meta_NowPlaying]   = libvlc_meta_NowPlaying,
  82     [vlc_meta_Publisher]    = libvlc_meta_Publisher,
  83     [vlc_meta_EncodedBy]    = libvlc_meta_EncodedBy,
  84     [vlc_meta_ArtworkURL]   = libvlc_meta_ArtworkURL,
  85     [vlc_meta_TrackID]      = libvlc_meta_TrackID
  86 };
  87
  88 /**************************************************************************
  89  * input_item_subitem_added (Private) (vlc event Callback)
  90  **************************************************************************/
  91 static void input_item_subitem_added( const vlc_event_t *p_event,
  92                                        void * user_data )
  93 {
  94     libvlc_media_t * p_md = user_data;
  95     libvlc_media_t * p_md_child;
  96     libvlc_event_t event;
  97
  98     p_md_child = libvlc_media_new_from_input_item(
  99                 p_md->p_libvlc_instance,
 100                 p_event->u.input_item_subitem_added.p_new_child );
 101
 102     /* Add this to our media list */
 103     if( !p_md->p_subitems )
 104     {
 105         p_md->p_subitems = libvlc_media_list_new( p_md->p_libvlc_instance );
 106         libvlc_media_list_set_media( p_md->p_subitems, p_md );
 107     }
 108     if( p_md->p_subitems )
 109     {
 110         libvlc_media_list_add_media( p_md->p_subitems, p_md_child );
 111     }
 112
 113     /* Construct the event */
 114     event.type = libvlc_MediaSubItemAdded;
 115     event.u.media_subitem_added.new_child = p_md_child;
 116
 117     /* Send the event */
 118     libvlc_event_send( p_md->p_event_manager, &event );
 119     libvlc_media_release( p_md_child );
 120 }
 121
 122 /**************************************************************************
 123  * input_item_meta_changed (Private) (vlc event Callback)
 124  **************************************************************************/
 125 static void input_item_meta_changed( const vlc_event_t *p_event,
 126                                      void * user_data )
 127 {
 128     libvlc_media_t * p_md = user_data;
 129     libvlc_event_t event;
 130
 131     /* Construct the event */
 132     event.type = libvlc_MediaMetaChanged;
 133     event.u.media_meta_changed.meta_type =
 134         vlc_to_libvlc_meta[p_event->u.input_item_meta_changed.meta_type];
 135
 136     /* Send the event */
 137     libvlc_event_send( p_md->p_event_manager, &event );
 138 }
 139
 140 /**************************************************************************
 141  * input_item_duration_changed (Private) (vlc event Callback)
 142  **************************************************************************/
 143 static void input_item_duration_changed( const vlc_event_t *p_event,
 144                                          void * user_data )
 145 {
 146     libvlc_media_t * p_md = user_data;
 147     libvlc_event_t event;
 148
 149     /* Construct the event */
 150     event.type = libvlc_MediaDurationChanged;
 151     event.u.media_duration_changed.new_duration =
 152         from_mtime(p_event->u.input_item_duration_changed.new_duration);
 153
 154     /* Send the event */
 155     libvlc_event_send( p_md->p_event_manager, &event );
 156 }
 157
 158 /**************************************************************************
 159  * input_item_preparsed_changed (Private) (vlc event Callback)
 160  **************************************************************************/
 161 static void input_item_preparsed_changed(const vlc_event_t *p_event,
 162                                          void * user_data)
 163 {
 164     libvlc_media_t *media = user_data;
 165     libvlc_event_t event;
 166
 167     /* Eventually notify libvlc_media_parse() */
 168     vlc_mutex_lock(&media->parsed_lock);
 169     media->is_parsed = true;
 170     vlc_cond_broadcast(&media->parsed_cond);
 171     vlc_mutex_unlock(&media->parsed_lock);
 172
 173
 174     /* Construct the event */
 175     event.type = libvlc_MediaPreparsedChanged;
 176     event.u.media_preparsed_changed.new_status =
 177         p_event->u.input_item_preparsed_changed.new_status;
 178
 179     /* Send the event */
 180     libvlc_event_send(media->p_event_manager, &event);
 181 }
 182
 183 /**************************************************************************
 184  * Install event handler (Private)
 185  **************************************************************************/
 186 static void install_input_item_observer( libvlc_media_t *p_md )
 187 {
 188     vlc_event_attach( &p_md->p_input_item->event_manager,
 189                       vlc_InputItemSubItemAdded,
 190                       input_item_subitem_added,
 191                       p_md );
 192     vlc_event_attach( &p_md->p_input_item->event_manager,
 193                       vlc_InputItemMetaChanged,
 194                       input_item_meta_changed,
 195                       p_md );
 196     vlc_event_attach( &p_md->p_input_item->event_manager,
 197                       vlc_InputItemDurationChanged,
 198                       input_item_duration_changed,
 199                       p_md );
 200     vlc_event_attach( &p_md->p_input_item->event_manager,
 201                       vlc_InputItemPreparsedChanged,
 202                       input_item_preparsed_changed,
 203                       p_md );
 204 }
 205
 206 /**************************************************************************
 207  * Uninstall event handler (Private)
 208  **************************************************************************/
 209 static void uninstall_input_item_observer( libvlc_media_t *p_md )
 210 {
 211     vlc_event_detach( &p_md->p_input_item->event_manager,
 212                       vlc_InputItemSubItemAdded,
 213                       input_item_subitem_added,
 214                       p_md );
 215     vlc_event_detach( &p_md->p_input_item->event_manager,
 216                       vlc_InputItemMetaChanged,
 217                       input_item_meta_changed,
 218                       p_md );
 219     vlc_event_detach( &p_md->p_input_item->event_manager,
 220                       vlc_InputItemDurationChanged,
 221                       input_item_duration_changed,
 222                       p_md );
 223     vlc_event_detach( &p_md->p_input_item->event_manager,
 224                       vlc_InputItemPreparsedChanged,
 225                       input_item_preparsed_changed,
 226                       p_md );
 227 }
 228
 229 /**************************************************************************
 230  * Preparse if not already done (Private)
 231  **************************************************************************/
 232 static void preparse_if_needed( libvlc_media_t *p_md )
 233 {
 234     /* XXX: need some locking here */
 235     if (!p_md->has_asked_preparse)
 236     {
 237         playlist_PreparseEnqueue(
 238                 libvlc_priv (p_md->p_libvlc_instance->p_libvlc_int)->p_playlist,
 239                 p_md->p_input_item );
 240         p_md->has_asked_preparse = true;
 241     }
 242 }
 243
 244 /**************************************************************************
 245  * Create a new media descriptor object from an input_item
 246  * (libvlc internal)
 247  * That's the generic constructor
 248  **************************************************************************/
 249 libvlc_media_t * libvlc_media_new_from_input_item(
 250                                    libvlc_instance_t *p_instance,
 251                                    input_item_t *p_input_item )
 252 {
 253     libvlc_media_t * p_md;
 254
 255     if (!p_input_item)
 256     {
 257         libvlc_printerr( "No input item given" );
 258         return NULL;
 259     }
 260
 261     p_md = calloc( 1, sizeof(libvlc_media_t) );
 262     if( !p_md )
 263     {
 264         libvlc_printerr( "Not enough memory" );
 265         return NULL;
 266     }
 267
 268     p_md->p_libvlc_instance = p_instance;
 269     p_md->p_input_item      = p_input_item;
 270     p_md->i_refcount        = 1;
 271
 272     vlc_cond_init(&p_md->parsed_cond);
 273     vlc_mutex_init(&p_md->parsed_lock);
 274
 275     p_md->state = libvlc_NothingSpecial;
 276
 277     /* A media descriptor can be a playlist. When you open a playlist
 278      * It can give a bunch of item to read. */
 279     p_md->p_subitems        = NULL;
 280
 281     p_md->p_event_manager = libvlc_event_manager_new( p_md, p_instance );
 282     if( unlikely(p_md->p_event_manager == NULL) )
 283     {
 284         free(p_md);
 285         return NULL;
 286     }
 287     libvlc_event_manager_register_event_type( p_md->p_event_manager,
 288         libvlc_MediaMetaChanged );
 289     libvlc_event_manager_register_event_type( p_md->p_event_manager,
 290         libvlc_MediaSubItemAdded );
 291     libvlc_event_manager_register_event_type( p_md->p_event_manager,
 292         libvlc_MediaFreed );
 293     libvlc_event_manager_register_event_type( p_md->p_event_manager,
 294         libvlc_MediaDurationChanged );
 295     libvlc_event_manager_register_event_type( p_md->p_event_manager,
 296         libvlc_MediaStateChanged );
 297     libvlc_event_manager_register_event_type( p_md->p_event_manager,
 298         libvlc_MediaPreparsedChanged );
 299
 300     vlc_gc_incref( p_md->p_input_item );
 301
 302     install_input_item_observer( p_md );
 303
 304     return p_md;
 305 }
 306
 307 /**************************************************************************
 308  * Create a new media descriptor object
 309  **************************************************************************/
 310 libvlc_media_t *libvlc_media_new_location( libvlc_instance_t *p_instance,
 311                                            const char * psz_mrl )
 312 {
 313     input_item_t * p_input_item;
 314     libvlc_media_t * p_md;
 315
 316     p_input_item = input_item_New( p_instance->p_libvlc_int, psz_mrl, NULL );
 317
 318     if (!p_input_item)
 319     {
 320         libvlc_printerr( "Not enough memory" );
 321         return NULL;
 322     }
 323
 324     p_md = libvlc_media_new_from_input_item( p_instance, p_input_item );
 325
 326     /* The p_input_item is retained in libvlc_media_new_from_input_item */
 327     vlc_gc_decref( p_input_item );
 328
 329     return p_md;
 330 }
 331
 332 libvlc_media_t *libvlc_media_new_path( libvlc_instance_t *p_instance,
 333                                        const char *path )
 334 {
 335     char *mrl = make_URI( path );
 336     if( unlikely(mrl == NULL) )
 337     {
 338         libvlc_printerr( "Not enough memory" );
 339         return NULL;
 340     }
 341
 342     libvlc_media_t *m = libvlc_media_new_location( p_instance, mrl );
 343     free( mrl );
 344     return m;
 345 }
 346
 347 /**************************************************************************
 348  * Create a new media descriptor object
 349  **************************************************************************/
 350 libvlc_media_t * libvlc_media_new_as_node( libvlc_instance_t *p_instance,
 351                                            const char * psz_name )
 352 {
 353     input_item_t * p_input_item;
 354     libvlc_media_t * p_md;
 355
 356     p_input_item = input_item_New( p_instance->p_libvlc_int, "vlc://nop", psz_name );
 357
 358     if (!p_input_item)
 359     {
 360         libvlc_printerr( "Not enough memory" );
 361         return NULL;
 362     }
 363
 364     p_md = libvlc_media_new_from_input_item( p_instance, p_input_item );
 365
 366     p_md->p_subitems = libvlc_media_list_new( p_md->p_libvlc_instance );
 367
 368     return p_md;
 369 }
 370
 371 /**************************************************************************
 372  * Add an option to the media descriptor,
 373  * that will be used to determine how the media_player will read the
 374  * media. This allow to use VLC advanced reading/streaming
 375  * options in a per-media basis
 376  *
 377  * The options are detailled in vlc --long-help, for instance "--sout-all"
 378  **************************************************************************/
 379 void libvlc_media_add_option( libvlc_media_t * p_md,
 380                               const char * psz_option )
 381 {
 382     libvlc_media_add_option_flag( p_md, psz_option,
 383                           VLC_INPUT_OPTION_UNIQUE|VLC_INPUT_OPTION_TRUSTED );
 384 }
 385
 386 /**************************************************************************
 387  * Same as libvlc_media_add_option but with configurable flags.
 388  **************************************************************************/
 389 void libvlc_media_add_option_flag( libvlc_media_t * p_md,
 390                                    const char * ppsz_option,
 391                                    unsigned i_flags )
 392 {
 393     input_item_AddOption( p_md->p_input_item, ppsz_option, i_flags );
 394 }
 395
 396 /**************************************************************************
 397  * Delete a media descriptor object
 398  **************************************************************************/
 399 void libvlc_media_release( libvlc_media_t *p_md )
 400 {
 401     if (!p_md)
 402         return;
 403
 404     p_md->i_refcount--;
 405
 406     if( p_md->i_refcount > 0 )
 407         return;
 408
 409     if( p_md->p_subitems )
 410         libvlc_media_list_release( p_md->p_subitems );
 411
 412     uninstall_input_item_observer( p_md );
 413     vlc_gc_decref( p_md->p_input_item );
 414
 415     /* Construct the event */
 416     libvlc_event_t event;
 417     event.type = libvlc_MediaFreed;
 418     event.u.media_freed.md = p_md;
 419
 420     /* Send the event */
 421     libvlc_event_send( p_md->p_event_manager, &event );
 422
 423     libvlc_event_manager_release( p_md->p_event_manager );
 424
 425     free( p_md );
 426 }
 427
 428 /**************************************************************************
 429  * Retain a media descriptor object
 430  **************************************************************************/
 431 void libvlc_media_retain( libvlc_media_t *p_md )
 432 {
 433     assert (p_md);
 434     p_md->i_refcount++;
 435 }
 436
 437 /**************************************************************************
 438  * Duplicate a media descriptor object
 439  **************************************************************************/
 440 libvlc_media_t *
 441 libvlc_media_duplicate( libvlc_media_t *p_md_orig )
 442 {
 443     return libvlc_media_new_from_input_item(
 444         p_md_orig->p_libvlc_instance, p_md_orig->p_input_item );
 445 }
 446
 447 /**************************************************************************
 448  * Get mrl from a media descriptor object
 449  **************************************************************************/
 450 char *
 451 libvlc_media_get_mrl( libvlc_media_t * p_md )
 452 {
 453     assert( p_md );
 454     return input_item_GetURI( p_md->p_input_item );
 455 }
 456
 457 /**************************************************************************
 458  * Getter for meta information
 459  **************************************************************************/
 460
 461 char *libvlc_media_get_meta( libvlc_media_t *p_md, libvlc_meta_t e_meta )
 462 {
 463     char * psz_meta;
 464
 465     assert( p_md );
 466     /* XXX: locking */
 467
 468     preparse_if_needed( p_md );
 469
 470     psz_meta = input_item_GetMeta( p_md->p_input_item,
 471                                    libvlc_to_vlc_meta[e_meta] );
 472
 473     if( e_meta == libvlc_meta_ArtworkURL && !psz_meta && !p_md->has_asked_art )
 474     {
 475         p_md->has_asked_art = true;
 476         playlist_AskForArtEnqueue(
 477                 libvlc_priv(p_md->p_libvlc_instance->p_libvlc_int)->p_playlist,
 478                 p_md->p_input_item );
 479     }
 480
 481     /* Should be integrated in core */
 482     if( !psz_meta && e_meta == libvlc_meta_Title && p_md->p_input_item->psz_name )
 483     {
 484         free( psz_meta );
 485         return strdup( p_md->p_input_item->psz_name );
 486     }
 487
 488     return psz_meta;
 489 }
 490
 491 /**************************************************************************
 492  * Setter for meta information
 493  **************************************************************************/
 494
 495 void libvlc_media_set_meta( libvlc_media_t *p_md, libvlc_meta_t e_meta, const char *psz_value )
 496 {
 497     assert( p_md );
 498     input_item_SetMeta( p_md->p_input_item, libvlc_to_vlc_meta[e_meta], psz_value );
 499 }
 500
 501 int libvlc_media_save_meta( libvlc_media_t *p_md )
 502 {
 503     assert( p_md );
 504     vlc_object_t *p_obj = VLC_OBJECT(libvlc_priv(
 505                             p_md->p_libvlc_instance->p_libvlc_int)->p_playlist);
 506     return input_item_WriteMeta( p_obj, p_md->p_input_item ) == VLC_SUCCESS;
 507 }
 508
 509 /**************************************************************************
 510  * Getter for state information
 511  * Can be error, playing, buffering, NothingSpecial.
 512  **************************************************************************/
 513
 514 libvlc_state_t
 515 libvlc_media_get_state( libvlc_media_t *p_md )
 516 {
 517     assert( p_md );
 518     return p_md->state;
 519 }
 520
 521 /**************************************************************************
 522  * Setter for state information (LibVLC Internal)
 523  **************************************************************************/
 524
 525 void
 526 libvlc_media_set_state( libvlc_media_t *p_md,
 527                                    libvlc_state_t state )
 528 {
 529     libvlc_event_t event;
 530
 531     p_md->state = state;
 532
 533     /* Construct the event */
 534     event.type = libvlc_MediaStateChanged;
 535     event.u.media_state_changed.new_state = state;
 536
 537     /* Send the event */
 538     libvlc_event_send( p_md->p_event_manager, &event );
 539 }
 540
 541 /**************************************************************************
 542  * subitems
 543  **************************************************************************/
 544 libvlc_media_list_t *
 545 libvlc_media_subitems( libvlc_media_t * p_md )
 546 {
 547     if( p_md->p_subitems )
 548         libvlc_media_list_retain( p_md->p_subitems );
 549     return p_md->p_subitems;
 550 }
 551
 552 /**************************************************************************
 553  * Getter for statistics information
 554  **************************************************************************/
 555 int libvlc_media_get_stats( libvlc_media_t *p_md,
 556                             libvlc_media_stats_t *p_stats )
 557 {
 558     if( !p_md->p_input_item )
 559         return false;
 560
 561     input_stats_t *p_itm_stats = p_md->p_input_item->p_stats;
 562     vlc_mutex_lock( &p_itm_stats->lock );
 563     p_stats->i_read_bytes = p_itm_stats->i_read_bytes;
 564     p_stats->f_input_bitrate = p_itm_stats->f_input_bitrate;
 565
 566     p_stats->i_demux_read_bytes = p_itm_stats->i_demux_read_bytes;
 567     p_stats->f_demux_bitrate = p_itm_stats->f_demux_bitrate;
 568     p_stats->i_demux_corrupted = p_itm_stats->i_demux_corrupted;
 569     p_stats->i_demux_discontinuity = p_itm_stats->i_demux_discontinuity;
 570
 571     p_stats->i_decoded_video = p_itm_stats->i_decoded_video;
 572     p_stats->i_decoded_audio = p_itm_stats->i_decoded_audio;
 573
 574     p_stats->i_displayed_pictures = p_itm_stats->i_displayed_pictures;
 575     p_stats->i_lost_pictures = p_itm_stats->i_lost_pictures;
 576
 577     p_stats->i_played_abuffers = p_itm_stats->i_played_abuffers;
 578     p_stats->i_lost_abuffers = p_itm_stats->i_lost_abuffers;
 579
 580     p_stats->i_sent_packets = p_itm_stats->i_sent_packets;
 581     p_stats->i_sent_bytes = p_itm_stats->i_sent_bytes;
 582     p_stats->f_send_bitrate = p_itm_stats->f_send_bitrate;
 583     vlc_mutex_unlock( &p_itm_stats->lock );
 584     return true;
 585 }
 586
 587 /**************************************************************************
 588  * event_manager
 589  **************************************************************************/
 590 libvlc_event_manager_t *
 591 libvlc_media_event_manager( libvlc_media_t * p_md )
 592 {
 593     assert( p_md );
 594
 595     return p_md->p_event_manager;
 596 }
 597
 598 /**************************************************************************
 599  * Get duration of media object (in ms)
 600  **************************************************************************/
 601 int64_t
 602 libvlc_media_get_duration( libvlc_media_t * p_md )
 603 {
 604     assert( p_md );
 605
 606     if( !p_md->p_input_item )
 607     {
 608         libvlc_printerr( "No input item" );
 609         return -1;
 610     }
 611
 612     preparse_if_needed( p_md );
 613
 614     if (!input_item_IsPreparsed( p_md->p_input_item ))
 615         return -1;
 616
 617     return from_mtime(input_item_GetDuration( p_md->p_input_item ));
 618 }
 619
 620 /**************************************************************************
 621  * Parse the media.
 622  **************************************************************************/
 623 void
 624 libvlc_media_parse(libvlc_media_t *media)
 625 {
 626     preparse_if_needed(media);
 627
 628     vlc_mutex_lock(&media->parsed_lock);
 629     while (!media->is_parsed)
 630         vlc_cond_wait(&media->parsed_cond, &media->parsed_lock);
 631     vlc_mutex_unlock(&media->parsed_lock);
 632 }
 633
 634 /**************************************************************************
 635  * Parse the media.
 636  **************************************************************************/
 637 void
 638 libvlc_media_parse_async(libvlc_media_t *media)
 639 {
 640     preparse_if_needed(media);
 641 }
 642
 643 /**************************************************************************
 644  * Get preparsed status for media object.
 645  **************************************************************************/
 646 int
 647 libvlc_media_is_preparsed( libvlc_media_t * p_md )
 648 {
 649     assert( p_md );
 650
 651     if( !p_md->p_input_item )
 652         return false;
 653
 654     return input_item_IsPreparsed( p_md->p_input_item );
 655 }
 656
 657 /**************************************************************************
 658  * Sets media descriptor's user_data. user_data is specialized data
 659  * accessed by the host application, VLC.framework uses it as a pointer to
 660  * an native object that references a libvlc_media_t pointer
 661  **************************************************************************/
 662 void
 663 libvlc_media_set_user_data( libvlc_media_t * p_md, void * p_new_user_data )
 664 {
 665     assert( p_md );
 666     p_md->p_user_data = p_new_user_data;
 667 }
 668
 669 /**************************************************************************
 670  * Get media descriptor's user_data. user_data is specialized data
 671  * accessed by the host application, VLC.framework uses it as a pointer to
 672  * an native object that references a libvlc_media_t pointer
 673  **************************************************************************/
 674 void *
 675 libvlc_media_get_user_data( libvlc_media_t * p_md )
 676 {
 677     assert( p_md );
 678     return p_md->p_user_data;
 679 }
 680
 681 /**************************************************************************
 682  * Get media descriptor's elementary streams description
 683  **************************************************************************/
 684 int
 685 libvlc_media_get_tracks_info( libvlc_media_t *p_md, libvlc_media_track_info_t ** pp_es )
 686 {
 687     assert( p_md );
 688
 689     input_item_t *p_input_item = p_md->p_input_item;
 690     vlc_mutex_lock( &p_input_item->lock );
 691
 692     const int i_es = p_input_item->i_es;
 693     *pp_es = (i_es > 0) ? malloc( i_es * sizeof(libvlc_media_track_info_t) ) : NULL;
 694
 695     if( !pp_es ) /* no ES, or OOM */
 696     {
 697         vlc_mutex_unlock( &p_input_item->lock );
 698         return 0;
 699     }
 700
 701     /* Fill array */
 702     for( int i = 0; i < i_es; i++ )
 703     {
 704         libvlc_media_track_info_t *p_mes = *pp_es+i;
 705         const es_format_t *p_es = p_input_item->es[i];
 706
 707         p_mes->i_channels = p_mes->i_rate = 0;
 708         p_mes->i_width = p_mes->i_height = 0;
 709
 710
 711         p_mes->i_codec = p_es->i_codec;
 712         p_mes->i_id = p_es->i_id;
 713
 714         p_mes->i_profile = p_es->i_profile;
 715         p_mes->i_level = p_es->i_level;
 716
 717         switch(p_es->i_cat)
 718         {
 719         case UNKNOWN_ES:
 720         default:
 721             p_mes->i_type = libvlc_track_unknown;
 722             break;
 723         case VIDEO_ES:
 724             p_mes->i_type = libvlc_track_video;
 725             p_mes->i_height = p_es->video.i_height;
 726             p_mes->i_width = p_es->video.i_width;
 727             break;
 728         case AUDIO_ES:
 729             p_mes->i_type = libvlc_track_audio;
 730             p_mes->i_channels = p_es->audio.i_channels;
 731             p_mes->i_rate = p_es->audio.i_rate;
 732             break;
 733         case SPU_ES:
 734             p_mes->i_type = libvlc_track_text;
 735             break;
 736         }
 737     }
 738
 739     vlc_mutex_unlock( &p_input_item->lock );
 740     return i_es;
 741 }