lib/media.c

   1 /*****************************************************************************
   2  * media.c: Libvlc API media descripor management
   3  *****************************************************************************
   4  * Copyright (C) 2007 VLC authors and VideoLAN
   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 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 <errno.h>
  30
  31 #include <vlc/libvlc.h>
  32 #include <vlc/libvlc_media.h>
  33 #include <vlc/libvlc_media_list.h> // For the subitems, here for convenience
  34 #include <vlc/libvlc_events.h>
  35
  36 #include <vlc_common.h>
  37 #include <vlc_input.h>
  38 #include <vlc_meta.h>
  39 #include <vlc_playlist.h> /* For the preparser */
  40 #include <vlc_url.h>
  41
  42 #include "../src/libvlc.h"
  43
  44 #include "libvlc_internal.h"
  45 #include "media_internal.h"
  46
  47 static const vlc_meta_type_t libvlc_to_vlc_meta[] =
  48 {
  49     [libvlc_meta_Title]        = vlc_meta_Title,
  50     [libvlc_meta_Artist]       = vlc_meta_Artist,
  51     [libvlc_meta_Genre]        = vlc_meta_Genre,
  52     [libvlc_meta_Copyright]    = vlc_meta_Copyright,
  53     [libvlc_meta_Album]        = vlc_meta_Album,
  54     [libvlc_meta_TrackNumber]  = vlc_meta_TrackNumber,
  55     [libvlc_meta_Description]  = vlc_meta_Description,
  56     [libvlc_meta_Rating]       = vlc_meta_Rating,
  57     [libvlc_meta_Date]         = vlc_meta_Date,
  58     [libvlc_meta_Setting]      = vlc_meta_Setting,
  59     [libvlc_meta_URL]          = vlc_meta_URL,
  60     [libvlc_meta_Language]     = vlc_meta_Language,
  61     [libvlc_meta_NowPlaying]   = vlc_meta_NowPlaying,
  62     [libvlc_meta_Publisher]    = vlc_meta_Publisher,
  63     [libvlc_meta_EncodedBy]    = vlc_meta_EncodedBy,
  64     [libvlc_meta_ArtworkURL]   = vlc_meta_ArtworkURL,
  65     [libvlc_meta_TrackID]      = vlc_meta_TrackID,
  66     [libvlc_meta_TrackTotal]   = vlc_meta_TrackTotal,
  67     [libvlc_meta_Director]     = vlc_meta_Director,
  68     [libvlc_meta_Season]       = vlc_meta_Season,
  69     [libvlc_meta_Episode]      = vlc_meta_Episode,
  70     [libvlc_meta_ShowName]     = vlc_meta_ShowName,
  71     [libvlc_meta_Actors]       = vlc_meta_Actors
  72 };
  73
  74 static const libvlc_meta_t vlc_to_libvlc_meta[] =
  75 {
  76     [vlc_meta_Title]        = libvlc_meta_Title,
  77     [vlc_meta_Artist]       = libvlc_meta_Artist,
  78     [vlc_meta_Genre]        = libvlc_meta_Genre,
  79     [vlc_meta_Copyright]    = libvlc_meta_Copyright,
  80     [vlc_meta_Album]        = libvlc_meta_Album,
  81     [vlc_meta_TrackNumber]  = libvlc_meta_TrackNumber,
  82     [vlc_meta_Description]  = libvlc_meta_Description,
  83     [vlc_meta_Rating]       = libvlc_meta_Rating,
  84     [vlc_meta_Date]         = libvlc_meta_Date,
  85     [vlc_meta_Setting]      = libvlc_meta_Setting,
  86     [vlc_meta_URL]          = libvlc_meta_URL,
  87     [vlc_meta_Language]     = libvlc_meta_Language,
  88     [vlc_meta_NowPlaying]   = libvlc_meta_NowPlaying,
  89     [vlc_meta_Publisher]    = libvlc_meta_Publisher,
  90     [vlc_meta_EncodedBy]    = libvlc_meta_EncodedBy,
  91     [vlc_meta_ArtworkURL]   = libvlc_meta_ArtworkURL,
  92     [vlc_meta_TrackID]      = libvlc_meta_TrackID,
  93     [vlc_meta_TrackTotal]   = libvlc_meta_TrackTotal,
  94     [vlc_meta_Director]     = libvlc_meta_Director,
  95     [vlc_meta_Season]       = libvlc_meta_Season,
  96     [vlc_meta_Episode]      = libvlc_meta_Episode,
  97     [vlc_meta_ShowName]     = libvlc_meta_ShowName,
  98     [vlc_meta_Actors]       = libvlc_meta_Actors
  99 };
 100
 101 /**************************************************************************
 102  * input_item_subitem_added (Private) (vlc event Callback)
 103  **************************************************************************/
 104 static void input_item_subitem_added( const vlc_event_t *p_event,
 105                                        void * user_data )
 106 {
 107     libvlc_media_t * p_md = user_data;
 108     libvlc_media_t * p_md_child;
 109     libvlc_event_t event;
 110
 111     p_md_child = libvlc_media_new_from_input_item(
 112                 p_md->p_libvlc_instance,
 113                 p_event->u.input_item_subitem_added.p_new_child );
 114
 115     /* Add this to our media list */
 116     if( p_md->p_subitems == NULL )
 117     {
 118         p_md->p_subitems = libvlc_media_list_new( p_md->p_libvlc_instance );
 119         if( unlikely(p_md->p_subitems == NULL) )
 120             abort();
 121         libvlc_media_list_set_media( p_md->p_subitems, p_md );
 122     }
 123     libvlc_media_list_add_media( p_md->p_subitems, p_md_child );
 124
 125     /* Construct the event */
 126     event.type = libvlc_MediaSubItemAdded;
 127     event.u.media_subitem_added.new_child = p_md_child;
 128
 129     /* Send the event */
 130     libvlc_event_send( p_md->p_event_manager, &event );
 131     libvlc_media_release( p_md_child );
 132 }
 133
 134 /**************************************************************************
 135  * input_item_subitemtree_added (Private) (vlc event Callback)
 136  **************************************************************************/
 137 static void input_item_subitemtree_added( const vlc_event_t * p_event,
 138                                           void * user_data )
 139 {
 140     VLC_UNUSED( p_event );
 141     libvlc_media_t * p_md = user_data;
 142     libvlc_event_t event;
 143
 144     /* Construct the event */
 145     event.type = libvlc_MediaSubItemTreeAdded;
 146     event.u.media_subitemtree_added.item = p_md;
 147
 148     /* Send the event */
 149     libvlc_event_send( p_md->p_event_manager, &event );
 150 }
 151
 152 /**************************************************************************
 153  * input_item_meta_changed (Private) (vlc event Callback)
 154  **************************************************************************/
 155 static void input_item_meta_changed( const vlc_event_t *p_event,
 156                                      void * user_data )
 157 {
 158     libvlc_media_t * p_md = user_data;
 159     libvlc_event_t event;
 160
 161     /* Construct the event */
 162     event.type = libvlc_MediaMetaChanged;
 163     event.u.media_meta_changed.meta_type =
 164         vlc_to_libvlc_meta[p_event->u.input_item_meta_changed.meta_type];
 165
 166     /* Send the event */
 167     libvlc_event_send( p_md->p_event_manager, &event );
 168 }
 169
 170 /**************************************************************************
 171  * input_item_duration_changed (Private) (vlc event Callback)
 172  **************************************************************************/
 173 static void input_item_duration_changed( const vlc_event_t *p_event,
 174                                          void * user_data )
 175 {
 176     libvlc_media_t * p_md = user_data;
 177     libvlc_event_t event;
 178
 179     /* Construct the event */
 180     event.type = libvlc_MediaDurationChanged;
 181     event.u.media_duration_changed.new_duration =
 182         from_mtime(p_event->u.input_item_duration_changed.new_duration);
 183
 184     /* Send the event */
 185     libvlc_event_send( p_md->p_event_manager, &event );
 186 }
 187
 188 /**************************************************************************
 189  * input_item_preparsed_changed (Private) (vlc event Callback)
 190  **************************************************************************/
 191 static void input_item_preparsed_changed(const vlc_event_t *p_event,
 192                                          void * user_data)
 193 {
 194     libvlc_media_t *media = user_data;
 195     libvlc_event_t event;
 196
 197     /* Eventually notify libvlc_media_parse() */
 198     vlc_mutex_lock(&media->parsed_lock);
 199     media->is_parsed = true;
 200     vlc_cond_broadcast(&media->parsed_cond);
 201     vlc_mutex_unlock(&media->parsed_lock);
 202
 203
 204     /* Construct the event */
 205     event.type = libvlc_MediaParsedChanged;
 206     event.u.media_parsed_changed.new_status =
 207         p_event->u.input_item_preparsed_changed.new_status;
 208
 209     /* Send the event */
 210     libvlc_event_send(media->p_event_manager, &event);
 211 }
 212
 213 /**************************************************************************
 214  * Install event handler (Private)
 215  **************************************************************************/
 216 static void install_input_item_observer( libvlc_media_t *p_md )
 217 {
 218     vlc_event_attach( &p_md->p_input_item->event_manager,
 219                       vlc_InputItemSubItemAdded,
 220                       input_item_subitem_added,
 221                       p_md );
 222     vlc_event_attach( &p_md->p_input_item->event_manager,
 223                       vlc_InputItemMetaChanged,
 224                       input_item_meta_changed,
 225                       p_md );
 226     vlc_event_attach( &p_md->p_input_item->event_manager,
 227                       vlc_InputItemDurationChanged,
 228                       input_item_duration_changed,
 229                       p_md );
 230     vlc_event_attach( &p_md->p_input_item->event_manager,
 231                       vlc_InputItemPreparsedChanged,
 232                       input_item_preparsed_changed,
 233                       p_md );
 234     vlc_event_attach( &p_md->p_input_item->event_manager,
 235                       vlc_InputItemSubItemTreeAdded,
 236                       input_item_subitemtree_added,
 237                       p_md );
 238 }
 239
 240 /**************************************************************************
 241  * Uninstall event handler (Private)
 242  **************************************************************************/
 243 static void uninstall_input_item_observer( libvlc_media_t *p_md )
 244 {
 245     vlc_event_detach( &p_md->p_input_item->event_manager,
 246                       vlc_InputItemSubItemAdded,
 247                       input_item_subitem_added,
 248                       p_md );
 249     vlc_event_detach( &p_md->p_input_item->event_manager,
 250                       vlc_InputItemMetaChanged,
 251                       input_item_meta_changed,
 252                       p_md );
 253     vlc_event_detach( &p_md->p_input_item->event_manager,
 254                       vlc_InputItemDurationChanged,
 255                       input_item_duration_changed,
 256                       p_md );
 257     vlc_event_detach( &p_md->p_input_item->event_manager,
 258                       vlc_InputItemPreparsedChanged,
 259                       input_item_preparsed_changed,
 260                       p_md );
 261     vlc_event_detach( &p_md->p_input_item->event_manager,
 262                       vlc_InputItemSubItemTreeAdded,
 263                       input_item_subitemtree_added,
 264                       p_md );
 265 }
 266
 267 /**************************************************************************
 268  * Create a new media descriptor object from an input_item
 269  * (libvlc internal)
 270  * That's the generic constructor
 271  **************************************************************************/
 272 libvlc_media_t * libvlc_media_new_from_input_item(
 273                                    libvlc_instance_t *p_instance,
 274                                    input_item_t *p_input_item )
 275 {
 276     libvlc_media_t * p_md;
 277
 278     if (!p_input_item)
 279     {
 280         libvlc_printerr( "No input item given" );
 281         return NULL;
 282     }
 283
 284     p_md = calloc( 1, sizeof(libvlc_media_t) );
 285     if( !p_md )
 286     {
 287         libvlc_printerr( "Not enough memory" );
 288         return NULL;
 289     }
 290
 291     p_md->p_libvlc_instance = p_instance;
 292     p_md->p_input_item      = p_input_item;
 293     p_md->i_refcount        = 1;
 294
 295     vlc_cond_init(&p_md->parsed_cond);
 296     vlc_mutex_init(&p_md->parsed_lock);
 297
 298     p_md->state = libvlc_NothingSpecial;
 299
 300     /* A media descriptor can be a playlist. When you open a playlist
 301      * It can give a bunch of item to read. */
 302     p_md->p_subitems        = NULL;
 303
 304     p_md->p_event_manager = libvlc_event_manager_new( p_md, p_instance );
 305     if( unlikely(p_md->p_event_manager == NULL) )
 306     {
 307         free(p_md);
 308         return NULL;
 309     }
 310
 311     libvlc_event_manager_t *em = p_md->p_event_manager;
 312     libvlc_event_manager_register_event_type(em, libvlc_MediaMetaChanged);
 313     libvlc_event_manager_register_event_type(em, libvlc_MediaSubItemAdded);
 314     libvlc_event_manager_register_event_type(em, libvlc_MediaFreed);
 315     libvlc_event_manager_register_event_type(em, libvlc_MediaDurationChanged);
 316     libvlc_event_manager_register_event_type(em, libvlc_MediaStateChanged);
 317     libvlc_event_manager_register_event_type(em, libvlc_MediaParsedChanged);
 318     libvlc_event_manager_register_event_type(em, libvlc_MediaSubItemTreeAdded);
 319
 320     vlc_gc_incref( p_md->p_input_item );
 321
 322     install_input_item_observer( p_md );
 323
 324     return p_md;
 325 }
 326
 327 /**************************************************************************
 328  * Create a new media descriptor object
 329  **************************************************************************/
 330 libvlc_media_t *libvlc_media_new_location( libvlc_instance_t *p_instance,
 331                                            const char * psz_mrl )
 332 {
 333     input_item_t * p_input_item;
 334     libvlc_media_t * p_md;
 335
 336     p_input_item = input_item_New( psz_mrl, NULL );
 337
 338     if (!p_input_item)
 339     {
 340         libvlc_printerr( "Not enough memory" );
 341         return NULL;
 342     }
 343
 344     p_md = libvlc_media_new_from_input_item( p_instance, p_input_item );
 345
 346     /* The p_input_item is retained in libvlc_media_new_from_input_item */
 347     vlc_gc_decref( p_input_item );
 348
 349     return p_md;
 350 }
 351
 352 libvlc_media_t *libvlc_media_new_path( libvlc_instance_t *p_instance,
 353                                        const char *path )
 354 {
 355     char *mrl = vlc_path2uri( path, NULL );
 356     if( unlikely(mrl == NULL) )
 357     {
 358         libvlc_printerr( "%s", vlc_strerror_c(errno) );
 359         return NULL;
 360     }
 361
 362     libvlc_media_t *m = libvlc_media_new_location( p_instance, mrl );
 363     free( mrl );
 364     return m;
 365 }
 366
 367 libvlc_media_t *libvlc_media_new_fd( libvlc_instance_t *p_instance, int fd )
 368 {
 369     char mrl[16];
 370     snprintf( mrl, sizeof(mrl), "fd://%d", fd );
 371
 372     return libvlc_media_new_location( p_instance, mrl );
 373 }
 374
 375 /**************************************************************************
 376  * Create a new media descriptor object
 377  **************************************************************************/
 378 libvlc_media_t * libvlc_media_new_as_node( libvlc_instance_t *p_instance,
 379                                            const char * psz_name )
 380 {
 381     input_item_t * p_input_item;
 382     libvlc_media_t * p_md;
 383
 384     p_input_item = input_item_New( "vlc://nop", psz_name );
 385
 386     if (!p_input_item)
 387     {
 388         libvlc_printerr( "Not enough memory" );
 389         return NULL;
 390     }
 391
 392     p_md = libvlc_media_new_from_input_item( p_instance, p_input_item );
 393
 394     p_md->p_subitems = libvlc_media_list_new( p_md->p_libvlc_instance );
 395
 396     return p_md;
 397 }
 398
 399 /**************************************************************************
 400  * Add an option to the media descriptor,
 401  * that will be used to determine how the media_player will read the
 402  * media. This allow to use VLC advanced reading/streaming
 403  * options in a per-media basis
 404  *
 405  * The options are detailled in vlc --long-help, for instance "--sout-all"
 406  **************************************************************************/
 407 void libvlc_media_add_option( libvlc_media_t * p_md,
 408                               const char * psz_option )
 409 {
 410     libvlc_media_add_option_flag( p_md, psz_option,
 411                           VLC_INPUT_OPTION_UNIQUE|VLC_INPUT_OPTION_TRUSTED );
 412 }
 413
 414 /**************************************************************************
 415  * Same as libvlc_media_add_option but with configurable flags.
 416  **************************************************************************/
 417 void libvlc_media_add_option_flag( libvlc_media_t * p_md,
 418                                    const char * ppsz_option,
 419                                    unsigned i_flags )
 420 {
 421     input_item_AddOption( p_md->p_input_item, ppsz_option, i_flags );
 422 }
 423
 424 /**************************************************************************
 425  * Delete a media descriptor object
 426  **************************************************************************/
 427 void libvlc_media_release( libvlc_media_t *p_md )
 428 {
 429     if (!p_md)
 430         return;
 431
 432     p_md->i_refcount--;
 433
 434     if( p_md->i_refcount > 0 )
 435         return;
 436
 437     if( p_md->p_subitems )
 438         libvlc_media_list_release( p_md->p_subitems );
 439
 440     uninstall_input_item_observer( p_md );
 441     vlc_gc_decref( p_md->p_input_item );
 442
 443     vlc_cond_destroy( &p_md->parsed_cond );
 444     vlc_mutex_destroy( &p_md->parsed_lock );
 445
 446     /* Construct the event */
 447     libvlc_event_t event;
 448     event.type = libvlc_MediaFreed;
 449     event.u.media_freed.md = p_md;
 450
 451     /* Send the event */
 452     libvlc_event_send( p_md->p_event_manager, &event );
 453
 454     libvlc_event_manager_release( p_md->p_event_manager );
 455
 456     free( p_md );
 457 }
 458
 459 /**************************************************************************
 460  * Retain a media descriptor object
 461  **************************************************************************/
 462 void libvlc_media_retain( libvlc_media_t *p_md )
 463 {
 464     assert (p_md);
 465     p_md->i_refcount++;
 466 }
 467
 468 /**************************************************************************
 469  * Duplicate a media descriptor object
 470  **************************************************************************/
 471 libvlc_media_t *
 472 libvlc_media_duplicate( libvlc_media_t *p_md_orig )
 473 {
 474     return libvlc_media_new_from_input_item(
 475         p_md_orig->p_libvlc_instance, p_md_orig->p_input_item );
 476 }
 477
 478 /**************************************************************************
 479  * Get mrl from a media descriptor object
 480  **************************************************************************/
 481 char *
 482 libvlc_media_get_mrl( libvlc_media_t * p_md )
 483 {
 484     assert( p_md );
 485     return input_item_GetURI( p_md->p_input_item );
 486 }
 487
 488 /**************************************************************************
 489  * Getter for meta information
 490  **************************************************************************/
 491
 492 char *libvlc_media_get_meta( libvlc_media_t *p_md, libvlc_meta_t e_meta )
 493 {
 494     char *psz_meta = input_item_GetMeta( p_md->p_input_item,
 495                                          libvlc_to_vlc_meta[e_meta] );
 496     /* Should be integrated in core */
 497     if( psz_meta == NULL && e_meta == libvlc_meta_Title
 498      && p_md->p_input_item->psz_name != NULL )
 499         psz_meta = strdup( p_md->p_input_item->psz_name );
 500
 501     return psz_meta;
 502 }
 503
 504 /**************************************************************************
 505  * Setter for meta information
 506  **************************************************************************/
 507
 508 void libvlc_media_set_meta( libvlc_media_t *p_md, libvlc_meta_t e_meta, const char *psz_value )
 509 {
 510     assert( p_md );
 511     input_item_SetMeta( p_md->p_input_item, libvlc_to_vlc_meta[e_meta], psz_value );
 512 }
 513
 514 int libvlc_media_save_meta( libvlc_media_t *p_md )
 515 {
 516     assert( p_md );
 517     vlc_object_t *p_obj = VLC_OBJECT(p_md->p_libvlc_instance->p_libvlc_int);
 518     return input_item_WriteMeta( p_obj, p_md->p_input_item ) == VLC_SUCCESS;
 519 }
 520
 521 /**************************************************************************
 522  * Getter for state information
 523  * Can be error, playing, buffering, NothingSpecial.
 524  **************************************************************************/
 525
 526 libvlc_state_t
 527 libvlc_media_get_state( libvlc_media_t *p_md )
 528 {
 529     assert( p_md );
 530     return p_md->state;
 531 }
 532
 533 /**************************************************************************
 534  * Setter for state information (LibVLC Internal)
 535  **************************************************************************/
 536
 537 void
 538 libvlc_media_set_state( libvlc_media_t *p_md,
 539                                    libvlc_state_t state )
 540 {
 541     libvlc_event_t event;
 542
 543     p_md->state = state;
 544
 545     /* Construct the event */
 546     event.type = libvlc_MediaStateChanged;
 547     event.u.media_state_changed.new_state = state;
 548
 549     /* Send the event */
 550     libvlc_event_send( p_md->p_event_manager, &event );
 551 }
 552
 553 /**************************************************************************
 554  * subitems
 555  **************************************************************************/
 556 libvlc_media_list_t *
 557 libvlc_media_subitems( libvlc_media_t * p_md )
 558 {
 559     if( p_md->p_subitems )
 560         libvlc_media_list_retain( p_md->p_subitems );
 561     return p_md->p_subitems;
 562 }
 563
 564 /**************************************************************************
 565  * Getter for statistics information
 566  **************************************************************************/
 567 int libvlc_media_get_stats( libvlc_media_t *p_md,
 568                             libvlc_media_stats_t *p_stats )
 569 {
 570     if( !p_md->p_input_item )
 571         return false;
 572
 573     input_stats_t *p_itm_stats = p_md->p_input_item->p_stats;
 574     vlc_mutex_lock( &p_itm_stats->lock );
 575     p_stats->i_read_bytes = p_itm_stats->i_read_bytes;
 576     p_stats->f_input_bitrate = p_itm_stats->f_input_bitrate;
 577
 578     p_stats->i_demux_read_bytes = p_itm_stats->i_demux_read_bytes;
 579     p_stats->f_demux_bitrate = p_itm_stats->f_demux_bitrate;
 580     p_stats->i_demux_corrupted = p_itm_stats->i_demux_corrupted;
 581     p_stats->i_demux_discontinuity = p_itm_stats->i_demux_discontinuity;
 582
 583     p_stats->i_decoded_video = p_itm_stats->i_decoded_video;
 584     p_stats->i_decoded_audio = p_itm_stats->i_decoded_audio;
 585
 586     p_stats->i_displayed_pictures = p_itm_stats->i_displayed_pictures;
 587     p_stats->i_lost_pictures = p_itm_stats->i_lost_pictures;
 588
 589     p_stats->i_played_abuffers = p_itm_stats->i_played_abuffers;
 590     p_stats->i_lost_abuffers = p_itm_stats->i_lost_abuffers;
 591
 592     p_stats->i_sent_packets = p_itm_stats->i_sent_packets;
 593     p_stats->i_sent_bytes = p_itm_stats->i_sent_bytes;
 594     p_stats->f_send_bitrate = p_itm_stats->f_send_bitrate;
 595     vlc_mutex_unlock( &p_itm_stats->lock );
 596     return true;
 597 }
 598
 599 /**************************************************************************
 600  * event_manager
 601  **************************************************************************/
 602 libvlc_event_manager_t *
 603 libvlc_media_event_manager( libvlc_media_t * p_md )
 604 {
 605     assert( p_md );
 606
 607     return p_md->p_event_manager;
 608 }
 609
 610 /**************************************************************************
 611  * Get duration of media object (in ms)
 612  **************************************************************************/
 613 int64_t
 614 libvlc_media_get_duration( libvlc_media_t * p_md )
 615 {
 616     assert( p_md );
 617
 618     if( !p_md->p_input_item )
 619     {
 620         libvlc_printerr( "No input item" );
 621         return -1;
 622     }
 623
 624     if (!input_item_IsPreparsed( p_md->p_input_item ))
 625         return -1;
 626
 627     return from_mtime(input_item_GetDuration( p_md->p_input_item ));
 628 }
 629
 630 static int media_parse(libvlc_media_t *media)
 631 {
 632     libvlc_int_t *libvlc = media->p_libvlc_instance->p_libvlc_int;
 633     input_item_t *item = media->p_input_item;
 634
 635     /* TODO: Fetch art on need basis. But how not to break compatibility? */
 636     libvlc_ArtRequest(libvlc, item, META_REQUEST_OPTION_NONE);
 637     return libvlc_MetaRequest(libvlc, item, META_REQUEST_OPTION_NONE);
 638 }
 639
 640 /**************************************************************************
 641  * Parse the media and wait.
 642  **************************************************************************/
 643 void
 644 libvlc_media_parse(libvlc_media_t *media)
 645 {
 646     vlc_mutex_lock(&media->parsed_lock);
 647     if (!media->has_asked_preparse)
 648     {
 649         media->has_asked_preparse = true;
 650         vlc_mutex_unlock(&media->parsed_lock);
 651
 652         if (media_parse(media))
 653             /* Parse failed: do not wait! */
 654             return;
 655         vlc_mutex_lock(&media->parsed_lock);
 656     }
 657
 658     while (!media->is_parsed)
 659         vlc_cond_wait(&media->parsed_cond, &media->parsed_lock);
 660     vlc_mutex_unlock(&media->parsed_lock);
 661 }
 662
 663 /**************************************************************************
 664  * Parse the media but do not wait.
 665  **************************************************************************/
 666 void
 667 libvlc_media_parse_async(libvlc_media_t *media)
 668 {
 669     bool needed;
 670
 671     vlc_mutex_lock(&media->parsed_lock);
 672     needed = !media->has_asked_preparse;
 673     media->has_asked_preparse = true;
 674     vlc_mutex_unlock(&media->parsed_lock);
 675
 676     if (needed)
 677         media_parse(media);
 678 }
 679
 680 /**************************************************************************
 681  * Get parsed status for media object.
 682  **************************************************************************/
 683 int
 684 libvlc_media_is_parsed(libvlc_media_t *media)
 685 {
 686     bool parsed;
 687
 688     vlc_mutex_lock(&media->parsed_lock);
 689     parsed = media->is_parsed;
 690     vlc_mutex_unlock(&media->parsed_lock);
 691     return parsed;
 692 }
 693
 694 /**************************************************************************
 695  * Sets media descriptor's user_data. user_data is specialized data
 696  * accessed by the host application, VLC.framework uses it as a pointer to
 697  * an native object that references a libvlc_media_t pointer
 698  **************************************************************************/
 699 void
 700 libvlc_media_set_user_data( libvlc_media_t * p_md, void * p_new_user_data )
 701 {
 702     assert( p_md );
 703     p_md->p_user_data = p_new_user_data;
 704 }
 705
 706 /**************************************************************************
 707  * Get media descriptor's user_data. user_data is specialized data
 708  * accessed by the host application, VLC.framework uses it as a pointer to
 709  * an native object that references a libvlc_media_t pointer
 710  **************************************************************************/
 711 void *
 712 libvlc_media_get_user_data( libvlc_media_t * p_md )
 713 {
 714     assert( p_md );
 715     return p_md->p_user_data;
 716 }
 717
 718 /**************************************************************************
 719  * Get media descriptor's elementary streams description
 720  **************************************************************************/
 721 int
 722 libvlc_media_get_tracks_info( libvlc_media_t *p_md, libvlc_media_track_info_t ** pp_es )
 723 {
 724     assert( p_md );
 725
 726     input_item_t *p_input_item = p_md->p_input_item;
 727     vlc_mutex_lock( &p_input_item->lock );
 728
 729     const int i_es = p_input_item->i_es;
 730     *pp_es = (i_es > 0) ? malloc( i_es * sizeof(libvlc_media_track_info_t) ) : NULL;
 731
 732     if( !*pp_es ) /* no ES, or OOM */
 733     {
 734         vlc_mutex_unlock( &p_input_item->lock );
 735         return 0;
 736     }
 737
 738     /* Fill array */
 739     for( int i = 0; i < i_es; i++ )
 740     {
 741         libvlc_media_track_info_t *p_mes = *pp_es+i;
 742         const es_format_t *p_es = p_input_item->es[i];
 743
 744         p_mes->i_codec = p_es->i_codec;
 745         p_mes->i_id = p_es->i_id;
 746
 747         p_mes->i_profile = p_es->i_profile;
 748         p_mes->i_level = p_es->i_level;
 749
 750         switch(p_es->i_cat)
 751         {
 752         case UNKNOWN_ES:
 753         default:
 754             p_mes->i_type = libvlc_track_unknown;
 755             break;
 756         case VIDEO_ES:
 757             p_mes->i_type = libvlc_track_video;
 758             p_mes->u.video.i_height = p_es->video.i_height;
 759             p_mes->u.video.i_width = p_es->video.i_width;
 760             break;
 761         case AUDIO_ES:
 762             p_mes->i_type = libvlc_track_audio;
 763             p_mes->u.audio.i_channels = p_es->audio.i_channels;
 764             p_mes->u.audio.i_rate = p_es->audio.i_rate;
 765             break;
 766         case SPU_ES:
 767             p_mes->i_type = libvlc_track_text;
 768             break;
 769         }
 770     }
 771
 772     vlc_mutex_unlock( &p_input_item->lock );
 773     return i_es;
 774 }
 775
 776 unsigned
 777 libvlc_media_tracks_get( libvlc_media_t *p_md, libvlc_media_track_t *** pp_es )
 778 {
 779     assert( p_md );
 780
 781     input_item_t *p_input_item = p_md->p_input_item;
 782     vlc_mutex_lock( &p_input_item->lock );
 783
 784     const int i_es = p_input_item->i_es;
 785     *pp_es = (i_es > 0) ? calloc( i_es, sizeof(**pp_es) ) : NULL;
 786
 787     if( !*pp_es ) /* no ES, or OOM */
 788     {
 789         vlc_mutex_unlock( &p_input_item->lock );
 790         return 0;
 791     }
 792
 793     /* Fill array */
 794     for( int i = 0; i < i_es; i++ )
 795     {
 796         libvlc_media_track_t *p_mes = calloc( 1, sizeof(*p_mes) );
 797         if ( p_mes )
 798         {
 799             p_mes->audio = malloc( __MAX(__MAX(sizeof(*p_mes->audio),
 800                                                sizeof(*p_mes->video)),
 801                                                sizeof(*p_mes->subtitle)) );
 802         }
 803         if ( !p_mes || !p_mes->audio )
 804         {
 805             libvlc_media_tracks_release( *pp_es, i_es );
 806             *pp_es = NULL;
 807             free( p_mes );
 808             vlc_mutex_unlock( &p_input_item->lock );
 809             return 0;
 810         }
 811         (*pp_es)[i] = p_mes;
 812
 813         const es_format_t *p_es = p_input_item->es[i];
 814
 815         p_mes->i_codec = p_es->i_codec;
 816         p_mes->i_original_fourcc = p_es->i_original_fourcc;
 817         p_mes->i_id = p_es->i_id;
 818
 819         p_mes->i_profile = p_es->i_profile;
 820         p_mes->i_level = p_es->i_level;
 821
 822         p_mes->i_bitrate = p_es->i_bitrate;
 823         p_mes->psz_language = p_es->psz_language != NULL ? strdup(p_es->psz_language) : NULL;
 824         p_mes->psz_description = p_es->psz_description != NULL ? strdup(p_es->psz_description) : NULL;
 825
 826         switch(p_es->i_cat)
 827         {
 828         case UNKNOWN_ES:
 829         default:
 830             p_mes->i_type = libvlc_track_unknown;
 831             break;
 832         case VIDEO_ES:
 833             p_mes->i_type = libvlc_track_video;
 834             p_mes->video->i_height = p_es->video.i_height;
 835             p_mes->video->i_width = p_es->video.i_width;
 836             p_mes->video->i_sar_num = p_es->video.i_sar_num;
 837             p_mes->video->i_sar_den = p_es->video.i_sar_den;
 838             p_mes->video->i_frame_rate_num = p_es->video.i_frame_rate;
 839             p_mes->video->i_frame_rate_den = p_es->video.i_frame_rate_base;
 840             break;
 841         case AUDIO_ES:
 842             p_mes->i_type = libvlc_track_audio;
 843             p_mes->audio->i_channels = p_es->audio.i_channels;
 844             p_mes->audio->i_rate = p_es->audio.i_rate;
 845             break;
 846         case SPU_ES:
 847             p_mes->i_type = libvlc_track_text;
 848             p_mes->subtitle->psz_encoding = p_es->subs.psz_encoding != NULL ?
 849                                             strdup(p_es->subs.psz_encoding) : NULL;
 850             break;
 851         }
 852     }
 853
 854     vlc_mutex_unlock( &p_input_item->lock );
 855     return i_es;
 856 }
 857
 858
 859 /**************************************************************************
 860  * Release media descriptor's elementary streams description array
 861  **************************************************************************/
 862 void libvlc_media_tracks_release( libvlc_media_track_t **p_tracks, unsigned i_count )
 863 {
 864     for( unsigned i = 0; i < i_count; ++i )
 865     {
 866         if ( !p_tracks[i] )
 867             continue;
 868         free( p_tracks[i]->psz_language );
 869         free( p_tracks[i]->psz_description );
 870         switch( p_tracks[i]->i_type )
 871         {
 872         case libvlc_track_audio:
 873             break;
 874         case libvlc_track_video:
 875             break;
 876         case libvlc_track_text:
 877             free( p_tracks[i]->subtitle->psz_encoding );
 878             break;
 879         case libvlc_track_unknown:
 880         default:
 881             break;
 882         }
 883         free( p_tracks[i]->audio );
 884         free( p_tracks[i] );
 885     }
 886     free( p_tracks );
 887 }