git.sesse.net Git - vlc/blob - 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 )
 117     {
 118         p_md->p_subitems = libvlc_media_list_new( p_md->p_libvlc_instance );
 119         libvlc_media_list_set_media( p_md->p_subitems, p_md );
 120     }
 121     if( p_md->p_subitems )
 122     {
 123         libvlc_media_list_add_media( p_md->p_subitems, p_md_child );
 124     }
 125
 126     /* Construct the event */
 127     event.type = libvlc_MediaSubItemAdded;
 128     event.u.media_subitem_added.new_child = p_md_child;
 129
 130     /* Send the event */
 131     libvlc_event_send( p_md->p_event_manager, &event );
 132     libvlc_media_release( p_md_child );
 133 }
 134
 135 /**************************************************************************
 136  * input_item_subitemtree_added (Private) (vlc event Callback)
 137  **************************************************************************/
 138 static void input_item_subitemtree_added( const vlc_event_t * p_event,
 139                                           void * user_data )
 140 {
 141     VLC_UNUSED( p_event );
 142     libvlc_media_t * p_md = user_data;
 143     libvlc_event_t event;
 144
 145     /* Construct the event */
 146     event.type = libvlc_MediaSubItemTreeAdded;
 147     event.u.media_subitemtree_added.item = p_md;
 148
 149     /* Send the event */
 150     libvlc_event_send( p_md->p_event_manager, &event );
 151 }
 152
 153 /**************************************************************************
 154  * input_item_meta_changed (Private) (vlc event Callback)
 155  **************************************************************************/
 156 static void input_item_meta_changed( const vlc_event_t *p_event,
 157                                      void * user_data )
 158 {
 159     libvlc_media_t * p_md = user_data;
 160     libvlc_event_t event;
 161
 162     /* Construct the event */
 163     event.type = libvlc_MediaMetaChanged;
 164     event.u.media_meta_changed.meta_type =
 165         vlc_to_libvlc_meta[p_event->u.input_item_meta_changed.meta_type];
 166
 167     /* Send the event */
 168     libvlc_event_send( p_md->p_event_manager, &event );
 169 }
 170
 171 /**************************************************************************
 172  * input_item_duration_changed (Private) (vlc event Callback)
 173  **************************************************************************/
 174 static void input_item_duration_changed( const vlc_event_t *p_event,
 175                                          void * user_data )
 176 {
 177     libvlc_media_t * p_md = user_data;
 178     libvlc_event_t event;
 179
 180     /* Construct the event */
 181     event.type = libvlc_MediaDurationChanged;
 182     event.u.media_duration_changed.new_duration =
 183         from_mtime(p_event->u.input_item_duration_changed.new_duration);
 184
 185     /* Send the event */
 186     libvlc_event_send( p_md->p_event_manager, &event );
 187 }
 188
 189 /**************************************************************************
 190  * input_item_preparsed_changed (Private) (vlc event Callback)
 191  **************************************************************************/
 192 static void input_item_preparsed_changed(const vlc_event_t *p_event,
 193                                          void * user_data)
 194 {
 195     libvlc_media_t *media = user_data;
 196     libvlc_event_t event;
 197
 198     /* Eventually notify libvlc_media_parse() */
 199     vlc_mutex_lock(&media->parsed_lock);
 200     media->is_parsed = true;
 201     vlc_cond_broadcast(&media->parsed_cond);
 202     vlc_mutex_unlock(&media->parsed_lock);
 203
 204
 205     /* Construct the event */
 206     event.type = libvlc_MediaParsedChanged;
 207     event.u.media_parsed_changed.new_status =
 208         p_event->u.input_item_preparsed_changed.new_status;
 209
 210     /* Send the event */
 211     libvlc_event_send(media->p_event_manager, &event);
 212 }
 213
 214 /**************************************************************************
 215  * Install event handler (Private)
 216  **************************************************************************/
 217 static void install_input_item_observer( libvlc_media_t *p_md )
 218 {
 219     vlc_event_attach( &p_md->p_input_item->event_manager,
 220                       vlc_InputItemSubItemAdded,
 221                       input_item_subitem_added,
 222                       p_md );
 223     vlc_event_attach( &p_md->p_input_item->event_manager,
 224                       vlc_InputItemMetaChanged,
 225                       input_item_meta_changed,
 226                       p_md );
 227     vlc_event_attach( &p_md->p_input_item->event_manager,
 228                       vlc_InputItemDurationChanged,
 229                       input_item_duration_changed,
 230                       p_md );
 231     vlc_event_attach( &p_md->p_input_item->event_manager,
 232                       vlc_InputItemPreparsedChanged,
 233                       input_item_preparsed_changed,
 234                       p_md );
 235     vlc_event_attach( &p_md->p_input_item->event_manager,
 236                       vlc_InputItemSubItemTreeAdded,
 237                       input_item_subitemtree_added,
 238                       p_md );
 239 }
 240
 241 /**************************************************************************
 242  * Uninstall event handler (Private)
 243  **************************************************************************/
 244 static void uninstall_input_item_observer( libvlc_media_t *p_md )
 245 {
 246     vlc_event_detach( &p_md->p_input_item->event_manager,
 247                       vlc_InputItemSubItemAdded,
 248                       input_item_subitem_added,
 249                       p_md );
 250     vlc_event_detach( &p_md->p_input_item->event_manager,
 251                       vlc_InputItemMetaChanged,
 252                       input_item_meta_changed,
 253                       p_md );
 254     vlc_event_detach( &p_md->p_input_item->event_manager,
 255                       vlc_InputItemDurationChanged,
 256                       input_item_duration_changed,
 257                       p_md );
 258     vlc_event_detach( &p_md->p_input_item->event_manager,
 259                       vlc_InputItemPreparsedChanged,
 260                       input_item_preparsed_changed,
 261                       p_md );
 262     vlc_event_detach( &p_md->p_input_item->event_manager,
 263                       vlc_InputItemSubItemTreeAdded,
 264                       input_item_subitemtree_added,
 265                       p_md );
 266 }
 267
 268 /**************************************************************************
 269  * Create a new media descriptor object from an input_item
 270  * (libvlc internal)
 271  * That's the generic constructor
 272  **************************************************************************/
 273 libvlc_media_t * libvlc_media_new_from_input_item(
 274                                    libvlc_instance_t *p_instance,
 275                                    input_item_t *p_input_item )
 276 {
 277     libvlc_media_t * p_md;
 278
 279     if (!p_input_item)
 280     {
 281         libvlc_printerr( "No input item given" );
 282         return NULL;
 283     }
 284
 285     p_md = calloc( 1, sizeof(libvlc_media_t) );
 286     if( !p_md )
 287     {
 288         libvlc_printerr( "Not enough memory" );
 289         return NULL;
 290     }
 291
 292     p_md->p_libvlc_instance = p_instance;
 293     p_md->p_input_item      = p_input_item;
 294     p_md->i_refcount        = 1;
 295
 296     vlc_cond_init(&p_md->parsed_cond);
 297     vlc_mutex_init(&p_md->parsed_lock);
 298
 299     p_md->state = libvlc_NothingSpecial;
 300
 301     /* A media descriptor can be a playlist. When you open a playlist
 302      * It can give a bunch of item to read. */
 303     p_md->p_subitems        = NULL;
 304
 305     p_md->p_event_manager = libvlc_event_manager_new( p_md, p_instance );
 306     if( unlikely(p_md->p_event_manager == NULL) )
 307     {
 308         free(p_md);
 309         return NULL;
 310     }
 311
 312     libvlc_event_manager_t *em = p_md->p_event_manager;
 313     libvlc_event_manager_register_event_type(em, libvlc_MediaMetaChanged);
 314     libvlc_event_manager_register_event_type(em, libvlc_MediaSubItemAdded);
 315     libvlc_event_manager_register_event_type(em, libvlc_MediaFreed);
 316     libvlc_event_manager_register_event_type(em, libvlc_MediaDurationChanged);
 317     libvlc_event_manager_register_event_type(em, libvlc_MediaStateChanged);
 318     libvlc_event_manager_register_event_type(em, libvlc_MediaParsedChanged);
 319     libvlc_event_manager_register_event_type(em, libvlc_MediaSubItemTreeAdded);
 320
 321     vlc_gc_incref( p_md->p_input_item );
 322
 323     install_input_item_observer( p_md );
 324
 325     return p_md;
 326 }
 327
 328 /**************************************************************************
 329  * Create a new media descriptor object
 330  **************************************************************************/
 331 libvlc_media_t *libvlc_media_new_location( libvlc_instance_t *p_instance,
 332                                            const char * psz_mrl )
 333 {
 334     input_item_t * p_input_item;
 335     libvlc_media_t * p_md;
 336
 337     p_input_item = input_item_New( psz_mrl, NULL );
 338
 339     if (!p_input_item)
 340     {
 341         libvlc_printerr( "Not enough memory" );
 342         return NULL;
 343     }
 344
 345     p_md = libvlc_media_new_from_input_item( p_instance, p_input_item );
 346
 347     /* The p_input_item is retained in libvlc_media_new_from_input_item */
 348     vlc_gc_decref( p_input_item );
 349
 350     return p_md;
 351 }
 352
 353 libvlc_media_t *libvlc_media_new_path( libvlc_instance_t *p_instance,
 354                                        const char *path )
 355 {
 356     char *mrl = vlc_path2uri( path, NULL );
 357     if( unlikely(mrl == NULL) )
 358     {
 359         libvlc_printerr( "%s", vlc_strerror_c(errno) );
 360         return NULL;
 361     }
 362
 363     libvlc_media_t *m = libvlc_media_new_location( p_instance, mrl );
 364     free( mrl );
 365     return m;
 366 }
 367
 368 libvlc_media_t *libvlc_media_new_fd( libvlc_instance_t *p_instance, int fd )
 369 {
 370     char mrl[16];
 371     snprintf( mrl, sizeof(mrl), "fd://%d", fd );
 372
 373     return libvlc_media_new_location( p_instance, mrl );
 374 }
 375
 376 /**************************************************************************
 377  * Create a new media descriptor object
 378  **************************************************************************/
 379 libvlc_media_t * libvlc_media_new_as_node( libvlc_instance_t *p_instance,
 380                                            const char * psz_name )
 381 {
 382     input_item_t * p_input_item;
 383     libvlc_media_t * p_md;
 384
 385     p_input_item = input_item_New( "vlc://nop", psz_name );
 386
 387     if (!p_input_item)
 388     {
 389         libvlc_printerr( "Not enough memory" );
 390         return NULL;
 391     }
 392
 393     p_md = libvlc_media_new_from_input_item( p_instance, p_input_item );
 394
 395     p_md->p_subitems = libvlc_media_list_new( p_md->p_libvlc_instance );
 396
 397     return p_md;
 398 }
 399
 400 /**************************************************************************
 401  * Add an option to the media descriptor,
 402  * that will be used to determine how the media_player will read the
 403  * media. This allow to use VLC advanced reading/streaming
 404  * options in a per-media basis
 405  *
 406  * The options are detailled in vlc --long-help, for instance "--sout-all"
 407  **************************************************************************/
 408 void libvlc_media_add_option( libvlc_media_t * p_md,
 409                               const char * psz_option )
 410 {
 411     libvlc_media_add_option_flag( p_md, psz_option,
 412                           VLC_INPUT_OPTION_UNIQUE|VLC_INPUT_OPTION_TRUSTED );
 413 }
 414
 415 /**************************************************************************
 416  * Same as libvlc_media_add_option but with configurable flags.
 417  **************************************************************************/
 418 void libvlc_media_add_option_flag( libvlc_media_t * p_md,
 419                                    const char * ppsz_option,
 420                                    unsigned i_flags )
 421 {
 422     input_item_AddOption( p_md->p_input_item, ppsz_option, i_flags );
 423 }
 424
 425 /**************************************************************************
 426  * Delete a media descriptor object
 427  **************************************************************************/
 428 void libvlc_media_release( libvlc_media_t *p_md )
 429 {
 430     if (!p_md)
 431         return;
 432
 433     p_md->i_refcount--;
 434
 435     if( p_md->i_refcount > 0 )
 436         return;
 437
 438     if( p_md->p_subitems )
 439         libvlc_media_list_release( p_md->p_subitems );
 440
 441     uninstall_input_item_observer( p_md );
 442     vlc_gc_decref( p_md->p_input_item );
 443
 444     vlc_cond_destroy( &p_md->parsed_cond );
 445     vlc_mutex_destroy( &p_md->parsed_lock );
 446
 447     /* Construct the event */
 448     libvlc_event_t event;
 449     event.type = libvlc_MediaFreed;
 450     event.u.media_freed.md = p_md;
 451
 452     /* Send the event */
 453     libvlc_event_send( p_md->p_event_manager, &event );
 454
 455     libvlc_event_manager_release( p_md->p_event_manager );
 456
 457     free( p_md );
 458 }
 459
 460 /**************************************************************************
 461  * Retain a media descriptor object
 462  **************************************************************************/
 463 void libvlc_media_retain( libvlc_media_t *p_md )
 464 {
 465     assert (p_md);
 466     p_md->i_refcount++;
 467 }
 468
 469 /**************************************************************************
 470  * Duplicate a media descriptor object
 471  **************************************************************************/
 472 libvlc_media_t *
 473 libvlc_media_duplicate( libvlc_media_t *p_md_orig )
 474 {
 475     return libvlc_media_new_from_input_item(
 476         p_md_orig->p_libvlc_instance, p_md_orig->p_input_item );
 477 }
 478
 479 /**************************************************************************
 480  * Get mrl from a media descriptor object
 481  **************************************************************************/
 482 char *
 483 libvlc_media_get_mrl( libvlc_media_t * p_md )
 484 {
 485     assert( p_md );
 486     return input_item_GetURI( p_md->p_input_item );
 487 }
 488
 489 /**************************************************************************
 490  * Getter for meta information
 491  **************************************************************************/
 492
 493 char *libvlc_media_get_meta( libvlc_media_t *p_md, libvlc_meta_t e_meta )
 494 {
 495     char *psz_meta = input_item_GetMeta( p_md->p_input_item,
 496                                          libvlc_to_vlc_meta[e_meta] );
 497     /* Should be integrated in core */
 498     if( psz_meta == NULL && e_meta == libvlc_meta_Title
 499      && p_md->p_input_item->psz_name != NULL )
 500         psz_meta = strdup( p_md->p_input_item->psz_name );
 501
 502     return psz_meta;
 503 }
 504
 505 /**************************************************************************
 506  * Setter for meta information
 507  **************************************************************************/
 508
 509 void libvlc_media_set_meta( libvlc_media_t *p_md, libvlc_meta_t e_meta, const char *psz_value )
 510 {
 511     assert( p_md );
 512     input_item_SetMeta( p_md->p_input_item, libvlc_to_vlc_meta[e_meta], psz_value );
 513 }
 514
 515 int libvlc_media_save_meta( libvlc_media_t *p_md )
 516 {
 517     assert( p_md );
 518     vlc_object_t *p_obj = VLC_OBJECT(p_md->p_libvlc_instance->p_libvlc_int);
 519     return input_item_WriteMeta( p_obj, p_md->p_input_item ) == VLC_SUCCESS;
 520 }
 521
 522 /**************************************************************************
 523  * Getter for state information
 524  * Can be error, playing, buffering, NothingSpecial.
 525  **************************************************************************/
 526
 527 libvlc_state_t
 528 libvlc_media_get_state( libvlc_media_t *p_md )
 529 {
 530     assert( p_md );
 531     return p_md->state;
 532 }
 533
 534 /**************************************************************************
 535  * Setter for state information (LibVLC Internal)
 536  **************************************************************************/
 537
 538 void
 539 libvlc_media_set_state( libvlc_media_t *p_md,
 540                                    libvlc_state_t state )
 541 {
 542     libvlc_event_t event;
 543
 544     p_md->state = state;
 545
 546     /* Construct the event */
 547     event.type = libvlc_MediaStateChanged;
 548     event.u.media_state_changed.new_state = state;
 549
 550     /* Send the event */
 551     libvlc_event_send( p_md->p_event_manager, &event );
 552 }
 553
 554 /**************************************************************************
 555  * subitems
 556  **************************************************************************/
 557 libvlc_media_list_t *
 558 libvlc_media_subitems( libvlc_media_t * p_md )
 559 {
 560     if( p_md->p_subitems )
 561         libvlc_media_list_retain( p_md->p_subitems );
 562     return p_md->p_subitems;
 563 }
 564
 565 /**************************************************************************
 566  * Getter for statistics information
 567  **************************************************************************/
 568 int libvlc_media_get_stats( libvlc_media_t *p_md,
 569                             libvlc_media_stats_t *p_stats )
 570 {
 571     if( !p_md->p_input_item )
 572         return false;
 573
 574     input_stats_t *p_itm_stats = p_md->p_input_item->p_stats;
 575     vlc_mutex_lock( &p_itm_stats->lock );
 576     p_stats->i_read_bytes = p_itm_stats->i_read_bytes;
 577     p_stats->f_input_bitrate = p_itm_stats->f_input_bitrate;
 578
 579     p_stats->i_demux_read_bytes = p_itm_stats->i_demux_read_bytes;
 580     p_stats->f_demux_bitrate = p_itm_stats->f_demux_bitrate;
 581     p_stats->i_demux_corrupted = p_itm_stats->i_demux_corrupted;
 582     p_stats->i_demux_discontinuity = p_itm_stats->i_demux_discontinuity;
 583
 584     p_stats->i_decoded_video = p_itm_stats->i_decoded_video;
 585     p_stats->i_decoded_audio = p_itm_stats->i_decoded_audio;
 586
 587     p_stats->i_displayed_pictures = p_itm_stats->i_displayed_pictures;
 588     p_stats->i_lost_pictures = p_itm_stats->i_lost_pictures;
 589
 590     p_stats->i_played_abuffers = p_itm_stats->i_played_abuffers;
 591     p_stats->i_lost_abuffers = p_itm_stats->i_lost_abuffers;
 592
 593     p_stats->i_sent_packets = p_itm_stats->i_sent_packets;
 594     p_stats->i_sent_bytes = p_itm_stats->i_sent_bytes;
 595     p_stats->f_send_bitrate = p_itm_stats->f_send_bitrate;
 596     vlc_mutex_unlock( &p_itm_stats->lock );
 597     return true;
 598 }
 599
 600 /**************************************************************************
 601  * event_manager
 602  **************************************************************************/
 603 libvlc_event_manager_t *
 604 libvlc_media_event_manager( libvlc_media_t * p_md )
 605 {
 606     assert( p_md );
 607
 608     return p_md->p_event_manager;
 609 }
 610
 611 /**************************************************************************
 612  * Get duration of media object (in ms)
 613  **************************************************************************/
 614 int64_t
 615 libvlc_media_get_duration( libvlc_media_t * p_md )
 616 {
 617     assert( p_md );
 618
 619     if( !p_md->p_input_item )
 620     {
 621         libvlc_printerr( "No input item" );
 622         return -1;
 623     }
 624
 625     if (!input_item_IsPreparsed( p_md->p_input_item ))
 626         return -1;
 627
 628     return from_mtime(input_item_GetDuration( p_md->p_input_item ));
 629 }
 630
 631 static int media_parse(libvlc_media_t *media)
 632 {
 633     libvlc_int_t *libvlc = media->p_libvlc_instance->p_libvlc_int;
 634     input_item_t *item = media->p_input_item;
 635
 636     /* TODO: Fetch art on need basis. But how not to break compatibility? */
 637     libvlc_ArtRequest(libvlc, item);
 638     return libvlc_MetaRequest(libvlc, item);
 639 }
 640
 641 /**************************************************************************
 642  * Parse the media and wait.
 643  **************************************************************************/
 644 void
 645 libvlc_media_parse(libvlc_media_t *media)
 646 {
 647     vlc_mutex_lock(&media->parsed_lock);
 648     if (!media->has_asked_preparse)
 649     {
 650         media->has_asked_preparse = true;
 651         vlc_mutex_unlock(&media->parsed_lock);
 652
 653         if (media_parse(media))
 654             /* Parse failed: do not wait! */
 655             return;
 656         vlc_mutex_lock(&media->parsed_lock);
 657     }
 658
 659     while (!media->is_parsed)
 660         vlc_cond_wait(&media->parsed_cond, &media->parsed_lock);
 661     vlc_mutex_unlock(&media->parsed_lock);
 662 }
 663
 664 /**************************************************************************
 665  * Parse the media but do not wait.
 666  **************************************************************************/
 667 void
 668 libvlc_media_parse_async(libvlc_media_t *media)
 669 {
 670     bool needed;
 671
 672     vlc_mutex_lock(&media->parsed_lock);
 673     needed = !media->has_asked_preparse;
 674     media->has_asked_preparse = true;
 675     vlc_mutex_unlock(&media->parsed_lock);
 676
 677     if (needed)
 678         media_parse(media);
 679 }
 680
 681 /**************************************************************************
 682  * Get parsed status for media object.
 683  **************************************************************************/
 684 int
 685 libvlc_media_is_parsed(libvlc_media_t *media)
 686 {
 687     bool parsed;
 688
 689     vlc_mutex_lock(&media->parsed_lock);
 690     parsed = media->is_parsed;
 691     vlc_mutex_unlock(&media->parsed_lock);
 692     return parsed;
 693 }
 694
 695 /**************************************************************************
 696  * Sets media descriptor's user_data. user_data is specialized data
 697  * accessed by the host application, VLC.framework uses it as a pointer to
 698  * an native object that references a libvlc_media_t pointer
 699  **************************************************************************/
 700 void
 701 libvlc_media_set_user_data( libvlc_media_t * p_md, void * p_new_user_data )
 702 {
 703     assert( p_md );
 704     p_md->p_user_data = p_new_user_data;
 705 }
 706
 707 /**************************************************************************
 708  * Get media descriptor's user_data. user_data is specialized data
 709  * accessed by the host application, VLC.framework uses it as a pointer to
 710  * an native object that references a libvlc_media_t pointer
 711  **************************************************************************/
 712 void *
 713 libvlc_media_get_user_data( libvlc_media_t * p_md )
 714 {
 715     assert( p_md );
 716     return p_md->p_user_data;
 717 }
 718
 719 /**************************************************************************
 720  * Get media descriptor's elementary streams description
 721  **************************************************************************/
 722 int
 723 libvlc_media_get_tracks_info( libvlc_media_t *p_md, libvlc_media_track_info_t ** pp_es )
 724 {
 725     assert( p_md );
 726
 727     input_item_t *p_input_item = p_md->p_input_item;
 728     vlc_mutex_lock( &p_input_item->lock );
 729
 730     const int i_es = p_input_item->i_es;
 731     *pp_es = (i_es > 0) ? malloc( i_es * sizeof(libvlc_media_track_info_t) ) : NULL;
 732
 733     if( !*pp_es ) /* no ES, or OOM */
 734     {
 735         vlc_mutex_unlock( &p_input_item->lock );
 736         return 0;
 737     }
 738
 739     /* Fill array */
 740     for( int i = 0; i < i_es; i++ )
 741     {
 742         libvlc_media_track_info_t *p_mes = *pp_es+i;
 743         const es_format_t *p_es = p_input_item->es[i];
 744
 745         p_mes->i_codec = p_es->i_codec;
 746         p_mes->i_id = p_es->i_id;
 747
 748         p_mes->i_profile = p_es->i_profile;
 749         p_mes->i_level = p_es->i_level;
 750
 751         switch(p_es->i_cat)
 752         {
 753         case UNKNOWN_ES:
 754         default:
 755             p_mes->i_type = libvlc_track_unknown;
 756             break;
 757         case VIDEO_ES:
 758             p_mes->i_type = libvlc_track_video;
 759             p_mes->u.video.i_height = p_es->video.i_height;
 760             p_mes->u.video.i_width = p_es->video.i_width;
 761             break;
 762         case AUDIO_ES:
 763             p_mes->i_type = libvlc_track_audio;
 764             p_mes->u.audio.i_channels = p_es->audio.i_channels;
 765             p_mes->u.audio.i_rate = p_es->audio.i_rate;
 766             break;
 767         case SPU_ES:
 768             p_mes->i_type = libvlc_track_text;
 769             break;
 770         }
 771     }
 772
 773     vlc_mutex_unlock( &p_input_item->lock );
 774     return i_es;
 775 }
 776
 777 unsigned
 778 libvlc_media_tracks_get( libvlc_media_t *p_md, libvlc_media_track_t *** pp_es )
 779 {
 780     assert( p_md );
 781
 782     input_item_t *p_input_item = p_md->p_input_item;
 783     vlc_mutex_lock( &p_input_item->lock );
 784
 785     const int i_es = p_input_item->i_es;
 786     *pp_es = (i_es > 0) ? calloc( i_es, sizeof(**pp_es) ) : NULL;
 787
 788     if( !*pp_es ) /* no ES, or OOM */
 789     {
 790         vlc_mutex_unlock( &p_input_item->lock );
 791         return 0;
 792     }
 793
 794     /* Fill array */
 795     for( int i = 0; i < i_es; i++ )
 796     {
 797         libvlc_media_track_t *p_mes = calloc( 1, sizeof(*p_mes) );
 798         if ( p_mes )
 799         {
 800             p_mes->audio = malloc( __MAX(__MAX(sizeof(*p_mes->audio),
 801                                                sizeof(*p_mes->video)),
 802                                                sizeof(*p_mes->subtitle)) );
 803         }
 804         if ( !p_mes || !p_mes->audio )
 805         {
 806             libvlc_media_tracks_release( *pp_es, i_es );
 807             *pp_es = NULL;
 808             free( p_mes );
 809             vlc_mutex_unlock( &p_input_item->lock );
 810             return 0;
 811         }
 812         (*pp_es)[i] = p_mes;
 813
 814         const es_format_t *p_es = p_input_item->es[i];
 815
 816         p_mes->i_codec = p_es->i_codec;
 817         p_mes->i_original_fourcc = p_es->i_original_fourcc;
 818         p_mes->i_id = p_es->i_id;
 819
 820         p_mes->i_profile = p_es->i_profile;
 821         p_mes->i_level = p_es->i_level;
 822
 823         p_mes->i_bitrate = p_es->i_bitrate;
 824         p_mes->psz_language = p_es->psz_language != NULL ? strdup(p_es->psz_language) : NULL;
 825         p_mes->psz_description = p_es->psz_description != NULL ? strdup(p_es->psz_description) : NULL;
 826
 827         switch(p_es->i_cat)
 828         {
 829         case UNKNOWN_ES:
 830         default:
 831             p_mes->i_type = libvlc_track_unknown;
 832             break;
 833         case VIDEO_ES:
 834             p_mes->i_type = libvlc_track_video;
 835             p_mes->video->i_height = p_es->video.i_height;
 836             p_mes->video->i_width = p_es->video.i_width;
 837             p_mes->video->i_sar_num = p_es->video.i_sar_num;
 838             p_mes->video->i_sar_den = p_es->video.i_sar_den;
 839             p_mes->video->i_frame_rate_num = p_es->video.i_frame_rate;
 840             p_mes->video->i_frame_rate_den = p_es->video.i_frame_rate_base;
 841             break;
 842         case AUDIO_ES:
 843             p_mes->i_type = libvlc_track_audio;
 844             p_mes->audio->i_channels = p_es->audio.i_channels;
 845             p_mes->audio->i_rate = p_es->audio.i_rate;
 846             break;
 847         case SPU_ES:
 848             p_mes->i_type = libvlc_track_text;
 849             p_mes->subtitle->psz_encoding = p_es->subs.psz_encoding != NULL ?
 850                                             strdup(p_es->subs.psz_encoding) : NULL;
 851             break;
 852         }
 853     }
 854
 855     vlc_mutex_unlock( &p_input_item->lock );
 856     return i_es;
 857 }
 858
 859
 860 /**************************************************************************
 861  * Release media descriptor's elementary streams description array
 862  **************************************************************************/
 863 void libvlc_media_tracks_release( libvlc_media_track_t **p_tracks, unsigned i_count )
 864 {
 865     for( unsigned i = 0; i < i_count; ++i )
 866     {
 867         if ( !p_tracks[i] )
 868             continue;
 869         free( p_tracks[i]->psz_language );
 870         free( p_tracks[i]->psz_description );
 871         switch( p_tracks[i]->i_type )
 872         {
 873         case libvlc_track_audio:
 874             break;
 875         case libvlc_track_video:
 876             break;
 877         case libvlc_track_text:
 878             free( p_tracks[i]->subtitle->psz_encoding );
 879             break;
 880         case libvlc_track_unknown:
 881         default:
 882             break;
 883         }
 884         free( p_tracks[i]->audio );
 885         free( p_tracks[i] );
 886     }
 887     free( p_tracks );
 888 }