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     [libvlc_meta_AlbumArtist]  = vlc_meta_AlbumArtist
  73 };
  74
  75 static const libvlc_meta_t vlc_to_libvlc_meta[] =
  76 {
  77     [vlc_meta_Title]        = libvlc_meta_Title,
  78     [vlc_meta_Artist]       = libvlc_meta_Artist,
  79     [vlc_meta_Genre]        = libvlc_meta_Genre,
  80     [vlc_meta_Copyright]    = libvlc_meta_Copyright,
  81     [vlc_meta_Album]        = libvlc_meta_Album,
  82     [vlc_meta_TrackNumber]  = libvlc_meta_TrackNumber,
  83     [vlc_meta_Description]  = libvlc_meta_Description,
  84     [vlc_meta_Rating]       = libvlc_meta_Rating,
  85     [vlc_meta_Date]         = libvlc_meta_Date,
  86     [vlc_meta_Setting]      = libvlc_meta_Setting,
  87     [vlc_meta_URL]          = libvlc_meta_URL,
  88     [vlc_meta_Language]     = libvlc_meta_Language,
  89     [vlc_meta_NowPlaying]   = libvlc_meta_NowPlaying,
  90     [vlc_meta_Publisher]    = libvlc_meta_Publisher,
  91     [vlc_meta_EncodedBy]    = libvlc_meta_EncodedBy,
  92     [vlc_meta_ArtworkURL]   = libvlc_meta_ArtworkURL,
  93     [vlc_meta_TrackID]      = libvlc_meta_TrackID,
  94     [vlc_meta_TrackTotal]   = libvlc_meta_TrackTotal,
  95     [vlc_meta_Director]     = libvlc_meta_Director,
  96     [vlc_meta_Season]       = libvlc_meta_Season,
  97     [vlc_meta_Episode]      = libvlc_meta_Episode,
  98     [vlc_meta_ShowName]     = libvlc_meta_ShowName,
  99     [vlc_meta_Actors]       = libvlc_meta_Actors,
 100     [vlc_meta_AlbumArtist]  = libvlc_meta_AlbumArtist
 101 };
 102
 103 /**************************************************************************
 104  * input_item_subitem_added (Private) (vlc event Callback)
 105  **************************************************************************/
 106 static void input_item_subitem_added( const vlc_event_t *p_event,
 107                                        void * user_data )
 108 {
 109     libvlc_media_t * p_md = user_data;
 110     libvlc_media_t * p_md_child;
 111     libvlc_event_t event;
 112
 113     p_md_child = libvlc_media_new_from_input_item(
 114                 p_md->p_libvlc_instance,
 115                 p_event->u.input_item_subitem_added.p_new_child );
 116
 117     /* Add this to our media list */
 118     if( p_md->p_subitems == NULL )
 119     {
 120         p_md->p_subitems = libvlc_media_list_new( p_md->p_libvlc_instance );
 121         if( unlikely(p_md->p_subitems == NULL) )
 122             abort();
 123         libvlc_media_list_set_media( p_md->p_subitems, p_md );
 124     }
 125     libvlc_media_list_add_media( p_md->p_subitems, p_md_child );
 126
 127     /* Construct the event */
 128     event.type = libvlc_MediaSubItemAdded;
 129     event.u.media_subitem_added.new_child = p_md_child;
 130
 131     /* Send the event */
 132     libvlc_event_send( p_md->p_event_manager, &event );
 133     libvlc_media_release( p_md_child );
 134 }
 135
 136 /**************************************************************************
 137  * input_item_subitemtree_added (Private) (vlc event Callback)
 138  **************************************************************************/
 139 static void input_item_subitemtree_added( const vlc_event_t * p_event,
 140                                           void * user_data )
 141 {
 142     VLC_UNUSED( p_event );
 143     libvlc_media_t * p_md = user_data;
 144     libvlc_event_t event;
 145
 146     /* Construct the event */
 147     event.type = libvlc_MediaSubItemTreeAdded;
 148     event.u.media_subitemtree_added.item = p_md;
 149
 150     /* Send the event */
 151     libvlc_event_send( p_md->p_event_manager, &event );
 152 }
 153
 154 /**************************************************************************
 155  * input_item_meta_changed (Private) (vlc event Callback)
 156  **************************************************************************/
 157 static void input_item_meta_changed( const vlc_event_t *p_event,
 158                                      void * user_data )
 159 {
 160     libvlc_media_t * p_md = user_data;
 161     libvlc_event_t event;
 162
 163     /* Construct the event */
 164     event.type = libvlc_MediaMetaChanged;
 165     event.u.media_meta_changed.meta_type =
 166         vlc_to_libvlc_meta[p_event->u.input_item_meta_changed.meta_type];
 167
 168     /* Send the event */
 169     libvlc_event_send( p_md->p_event_manager, &event );
 170 }
 171
 172 /**************************************************************************
 173  * input_item_duration_changed (Private) (vlc event Callback)
 174  **************************************************************************/
 175 static void input_item_duration_changed( const vlc_event_t *p_event,
 176                                          void * user_data )
 177 {
 178     libvlc_media_t * p_md = user_data;
 179     libvlc_event_t event;
 180
 181     /* Construct the event */
 182     event.type = libvlc_MediaDurationChanged;
 183     event.u.media_duration_changed.new_duration =
 184         from_mtime(p_event->u.input_item_duration_changed.new_duration);
 185
 186     /* Send the event */
 187     libvlc_event_send( p_md->p_event_manager, &event );
 188 }
 189
 190 /**************************************************************************
 191  * input_item_preparsed_changed (Private) (vlc event Callback)
 192  **************************************************************************/
 193 static void input_item_preparsed_changed(const vlc_event_t *p_event,
 194                                          void * user_data)
 195 {
 196     libvlc_media_t *media = user_data;
 197     libvlc_event_t event;
 198
 199     /* Eventually notify libvlc_media_parse() */
 200     vlc_mutex_lock(&media->parsed_lock);
 201     media->is_parsed = true;
 202     vlc_cond_broadcast(&media->parsed_cond);
 203     vlc_mutex_unlock(&media->parsed_lock);
 204
 205
 206     /* Construct the event */
 207     event.type = libvlc_MediaParsedChanged;
 208     event.u.media_parsed_changed.new_status =
 209         p_event->u.input_item_preparsed_changed.new_status;
 210
 211     /* Send the event */
 212     libvlc_event_send(media->p_event_manager, &event);
 213 }
 214
 215 /**************************************************************************
 216  * Install event handler (Private)
 217  **************************************************************************/
 218 static void install_input_item_observer( libvlc_media_t *p_md )
 219 {
 220     vlc_event_attach( &p_md->p_input_item->event_manager,
 221                       vlc_InputItemSubItemAdded,
 222                       input_item_subitem_added,
 223                       p_md );
 224     vlc_event_attach( &p_md->p_input_item->event_manager,
 225                       vlc_InputItemMetaChanged,
 226                       input_item_meta_changed,
 227                       p_md );
 228     vlc_event_attach( &p_md->p_input_item->event_manager,
 229                       vlc_InputItemDurationChanged,
 230                       input_item_duration_changed,
 231                       p_md );
 232     vlc_event_attach( &p_md->p_input_item->event_manager,
 233                       vlc_InputItemPreparsedChanged,
 234                       input_item_preparsed_changed,
 235                       p_md );
 236     vlc_event_attach( &p_md->p_input_item->event_manager,
 237                       vlc_InputItemSubItemTreeAdded,
 238                       input_item_subitemtree_added,
 239                       p_md );
 240 }
 241
 242 /**************************************************************************
 243  * Uninstall event handler (Private)
 244  **************************************************************************/
 245 static void uninstall_input_item_observer( libvlc_media_t *p_md )
 246 {
 247     vlc_event_detach( &p_md->p_input_item->event_manager,
 248                       vlc_InputItemSubItemAdded,
 249                       input_item_subitem_added,
 250                       p_md );
 251     vlc_event_detach( &p_md->p_input_item->event_manager,
 252                       vlc_InputItemMetaChanged,
 253                       input_item_meta_changed,
 254                       p_md );
 255     vlc_event_detach( &p_md->p_input_item->event_manager,
 256                       vlc_InputItemDurationChanged,
 257                       input_item_duration_changed,
 258                       p_md );
 259     vlc_event_detach( &p_md->p_input_item->event_manager,
 260                       vlc_InputItemPreparsedChanged,
 261                       input_item_preparsed_changed,
 262                       p_md );
 263     vlc_event_detach( &p_md->p_input_item->event_manager,
 264                       vlc_InputItemSubItemTreeAdded,
 265                       input_item_subitemtree_added,
 266                       p_md );
 267 }
 268
 269 /**************************************************************************
 270  * Create a new media descriptor object from an input_item
 271  * (libvlc internal)
 272  * That's the generic constructor
 273  **************************************************************************/
 274 libvlc_media_t * libvlc_media_new_from_input_item(
 275                                    libvlc_instance_t *p_instance,
 276                                    input_item_t *p_input_item )
 277 {
 278     libvlc_media_t * p_md;
 279
 280     if (!p_input_item)
 281     {
 282         libvlc_printerr( "No input item given" );
 283         return NULL;
 284     }
 285
 286     p_md = calloc( 1, sizeof(libvlc_media_t) );
 287     if( !p_md )
 288     {
 289         libvlc_printerr( "Not enough memory" );
 290         return NULL;
 291     }
 292
 293     p_md->p_libvlc_instance = p_instance;
 294     p_md->p_input_item      = p_input_item;
 295     p_md->i_refcount        = 1;
 296
 297     vlc_cond_init(&p_md->parsed_cond);
 298     vlc_mutex_init(&p_md->parsed_lock);
 299
 300     p_md->state = libvlc_NothingSpecial;
 301
 302     /* A media descriptor can be a playlist. When you open a playlist
 303      * It can give a bunch of item to read. */
 304     p_md->p_subitems        = NULL;
 305
 306     p_md->p_event_manager = libvlc_event_manager_new( p_md, p_instance );
 307     if( unlikely(p_md->p_event_manager == NULL) )
 308     {
 309         free(p_md);
 310         return NULL;
 311     }
 312
 313     libvlc_event_manager_t *em = p_md->p_event_manager;
 314     libvlc_event_manager_register_event_type(em, libvlc_MediaMetaChanged);
 315     libvlc_event_manager_register_event_type(em, libvlc_MediaSubItemAdded);
 316     libvlc_event_manager_register_event_type(em, libvlc_MediaFreed);
 317     libvlc_event_manager_register_event_type(em, libvlc_MediaDurationChanged);
 318     libvlc_event_manager_register_event_type(em, libvlc_MediaStateChanged);
 319     libvlc_event_manager_register_event_type(em, libvlc_MediaParsedChanged);
 320     libvlc_event_manager_register_event_type(em, libvlc_MediaSubItemTreeAdded);
 321
 322     vlc_gc_incref( p_md->p_input_item );
 323
 324     install_input_item_observer( p_md );
 325
 326     return p_md;
 327 }
 328
 329 /**************************************************************************
 330  * Create a new media descriptor object
 331  **************************************************************************/
 332 libvlc_media_t *libvlc_media_new_location( libvlc_instance_t *p_instance,
 333                                            const char * psz_mrl )
 334 {
 335     input_item_t * p_input_item;
 336     libvlc_media_t * p_md;
 337
 338     p_input_item = input_item_New( psz_mrl, NULL );
 339
 340     if (!p_input_item)
 341     {
 342         libvlc_printerr( "Not enough memory" );
 343         return NULL;
 344     }
 345
 346     p_md = libvlc_media_new_from_input_item( p_instance, p_input_item );
 347
 348     /* The p_input_item is retained in libvlc_media_new_from_input_item */
 349     vlc_gc_decref( p_input_item );
 350
 351     return p_md;
 352 }
 353
 354 libvlc_media_t *libvlc_media_new_path( libvlc_instance_t *p_instance,
 355                                        const char *path )
 356 {
 357     char *mrl = vlc_path2uri( path, NULL );
 358     if( unlikely(mrl == NULL) )
 359     {
 360         libvlc_printerr( "%s", vlc_strerror_c(errno) );
 361         return NULL;
 362     }
 363
 364     libvlc_media_t *m = libvlc_media_new_location( p_instance, mrl );
 365     free( mrl );
 366     return m;
 367 }
 368
 369 libvlc_media_t *libvlc_media_new_fd( libvlc_instance_t *p_instance, int fd )
 370 {
 371     char mrl[16];
 372     snprintf( mrl, sizeof(mrl), "fd://%d", fd );
 373
 374     return libvlc_media_new_location( p_instance, mrl );
 375 }
 376
 377 /**************************************************************************
 378  * Create a new media descriptor object
 379  **************************************************************************/
 380 libvlc_media_t * libvlc_media_new_as_node( libvlc_instance_t *p_instance,
 381                                            const char * psz_name )
 382 {
 383     input_item_t * p_input_item;
 384     libvlc_media_t * p_md;
 385
 386     p_input_item = input_item_New( "vlc://nop", psz_name );
 387
 388     if (!p_input_item)
 389     {
 390         libvlc_printerr( "Not enough memory" );
 391         return NULL;
 392     }
 393
 394     p_md = libvlc_media_new_from_input_item( p_instance, p_input_item );
 395
 396     p_md->p_subitems = libvlc_media_list_new( p_md->p_libvlc_instance );
 397
 398     return p_md;
 399 }
 400
 401 /**************************************************************************
 402  * Add an option to the media descriptor,
 403  * that will be used to determine how the media_player will read the
 404  * media. This allow to use VLC advanced reading/streaming
 405  * options in a per-media basis
 406  *
 407  * The options are detailled in vlc --long-help, for instance "--sout-all"
 408  **************************************************************************/
 409 void libvlc_media_add_option( libvlc_media_t * p_md,
 410                               const char * psz_option )
 411 {
 412     libvlc_media_add_option_flag( p_md, psz_option,
 413                           VLC_INPUT_OPTION_UNIQUE|VLC_INPUT_OPTION_TRUSTED );
 414 }
 415
 416 /**************************************************************************
 417  * Same as libvlc_media_add_option but with configurable flags.
 418  **************************************************************************/
 419 void libvlc_media_add_option_flag( libvlc_media_t * p_md,
 420                                    const char * ppsz_option,
 421                                    unsigned i_flags )
 422 {
 423     input_item_AddOption( p_md->p_input_item, ppsz_option, i_flags );
 424 }
 425
 426 /**************************************************************************
 427  * Delete a media descriptor object
 428  **************************************************************************/
 429 void libvlc_media_release( libvlc_media_t *p_md )
 430 {
 431     if (!p_md)
 432         return;
 433
 434     p_md->i_refcount--;
 435
 436     if( p_md->i_refcount > 0 )
 437         return;
 438
 439     if( p_md->p_subitems )
 440         libvlc_media_list_release( p_md->p_subitems );
 441
 442     uninstall_input_item_observer( p_md );
 443     vlc_gc_decref( p_md->p_input_item );
 444
 445     vlc_cond_destroy( &p_md->parsed_cond );
 446     vlc_mutex_destroy( &p_md->parsed_lock );
 447
 448     /* Construct the event */
 449     libvlc_event_t event;
 450     event.type = libvlc_MediaFreed;
 451     event.u.media_freed.md = p_md;
 452
 453     /* Send the event */
 454     libvlc_event_send( p_md->p_event_manager, &event );
 455
 456     libvlc_event_manager_release( p_md->p_event_manager );
 457
 458     free( p_md );
 459 }
 460
 461 /**************************************************************************
 462  * Retain a media descriptor object
 463  **************************************************************************/
 464 void libvlc_media_retain( libvlc_media_t *p_md )
 465 {
 466     assert (p_md);
 467     p_md->i_refcount++;
 468 }
 469
 470 /**************************************************************************
 471  * Duplicate a media descriptor object
 472  **************************************************************************/
 473 libvlc_media_t *
 474 libvlc_media_duplicate( libvlc_media_t *p_md_orig )
 475 {
 476     return libvlc_media_new_from_input_item(
 477         p_md_orig->p_libvlc_instance, p_md_orig->p_input_item );
 478 }
 479
 480 /**************************************************************************
 481  * Get mrl from a media descriptor object
 482  **************************************************************************/
 483 char *
 484 libvlc_media_get_mrl( libvlc_media_t * p_md )
 485 {
 486     assert( p_md );
 487     return input_item_GetURI( p_md->p_input_item );
 488 }
 489
 490 /**************************************************************************
 491  * Getter for meta information
 492  **************************************************************************/
 493
 494 char *libvlc_media_get_meta( libvlc_media_t *p_md, libvlc_meta_t e_meta )
 495 {
 496     char *psz_meta = input_item_GetMeta( p_md->p_input_item,
 497                                          libvlc_to_vlc_meta[e_meta] );
 498     /* Should be integrated in core */
 499     if( psz_meta == NULL && e_meta == libvlc_meta_Title
 500      && p_md->p_input_item->psz_name != NULL )
 501         psz_meta = strdup( p_md->p_input_item->psz_name );
 502
 503     return psz_meta;
 504 }
 505
 506 /**************************************************************************
 507  * Setter for meta information
 508  **************************************************************************/
 509
 510 void libvlc_media_set_meta( libvlc_media_t *p_md, libvlc_meta_t e_meta, const char *psz_value )
 511 {
 512     assert( p_md );
 513     input_item_SetMeta( p_md->p_input_item, libvlc_to_vlc_meta[e_meta], psz_value );
 514 }
 515
 516 int libvlc_media_save_meta( libvlc_media_t *p_md )
 517 {
 518     assert( p_md );
 519     vlc_object_t *p_obj = VLC_OBJECT(p_md->p_libvlc_instance->p_libvlc_int);
 520     return input_item_WriteMeta( p_obj, p_md->p_input_item ) == VLC_SUCCESS;
 521 }
 522
 523 /**************************************************************************
 524  * Getter for state information
 525  * Can be error, playing, buffering, NothingSpecial.
 526  **************************************************************************/
 527
 528 libvlc_state_t
 529 libvlc_media_get_state( libvlc_media_t *p_md )
 530 {
 531     assert( p_md );
 532     return p_md->state;
 533 }
 534
 535 /**************************************************************************
 536  * Setter for state information (LibVLC Internal)
 537  **************************************************************************/
 538
 539 void
 540 libvlc_media_set_state( libvlc_media_t *p_md,
 541                                    libvlc_state_t state )
 542 {
 543     libvlc_event_t event;
 544
 545     p_md->state = state;
 546
 547     /* Construct the event */
 548     event.type = libvlc_MediaStateChanged;
 549     event.u.media_state_changed.new_state = state;
 550
 551     /* Send the event */
 552     libvlc_event_send( p_md->p_event_manager, &event );
 553 }
 554
 555 /**************************************************************************
 556  * subitems
 557  **************************************************************************/
 558 libvlc_media_list_t *
 559 libvlc_media_subitems( libvlc_media_t * p_md )
 560 {
 561     if( p_md->p_subitems )
 562         libvlc_media_list_retain( p_md->p_subitems );
 563     return p_md->p_subitems;
 564 }
 565
 566 /**************************************************************************
 567  * Getter for statistics information
 568  **************************************************************************/
 569 int libvlc_media_get_stats( libvlc_media_t *p_md,
 570                             libvlc_media_stats_t *p_stats )
 571 {
 572     if( !p_md->p_input_item )
 573         return false;
 574
 575     input_stats_t *p_itm_stats = p_md->p_input_item->p_stats;
 576     vlc_mutex_lock( &p_itm_stats->lock );
 577     p_stats->i_read_bytes = p_itm_stats->i_read_bytes;
 578     p_stats->f_input_bitrate = p_itm_stats->f_input_bitrate;
 579
 580     p_stats->i_demux_read_bytes = p_itm_stats->i_demux_read_bytes;
 581     p_stats->f_demux_bitrate = p_itm_stats->f_demux_bitrate;
 582     p_stats->i_demux_corrupted = p_itm_stats->i_demux_corrupted;
 583     p_stats->i_demux_discontinuity = p_itm_stats->i_demux_discontinuity;
 584
 585     p_stats->i_decoded_video = p_itm_stats->i_decoded_video;
 586     p_stats->i_decoded_audio = p_itm_stats->i_decoded_audio;
 587
 588     p_stats->i_displayed_pictures = p_itm_stats->i_displayed_pictures;
 589     p_stats->i_lost_pictures = p_itm_stats->i_lost_pictures;
 590
 591     p_stats->i_played_abuffers = p_itm_stats->i_played_abuffers;
 592     p_stats->i_lost_abuffers = p_itm_stats->i_lost_abuffers;
 593
 594     p_stats->i_sent_packets = p_itm_stats->i_sent_packets;
 595     p_stats->i_sent_bytes = p_itm_stats->i_sent_bytes;
 596     p_stats->f_send_bitrate = p_itm_stats->f_send_bitrate;
 597     vlc_mutex_unlock( &p_itm_stats->lock );
 598     return true;
 599 }
 600
 601 /**************************************************************************
 602  * event_manager
 603  **************************************************************************/
 604 libvlc_event_manager_t *
 605 libvlc_media_event_manager( libvlc_media_t * p_md )
 606 {
 607     assert( p_md );
 608
 609     return p_md->p_event_manager;
 610 }
 611
 612 /**************************************************************************
 613  * Get duration of media object (in ms)
 614  **************************************************************************/
 615 int64_t
 616 libvlc_media_get_duration( libvlc_media_t * p_md )
 617 {
 618     assert( p_md );
 619
 620     if( !p_md->p_input_item )
 621     {
 622         libvlc_printerr( "No input item" );
 623         return -1;
 624     }
 625
 626     if (!input_item_IsPreparsed( p_md->p_input_item ))
 627         return -1;
 628
 629     return from_mtime(input_item_GetDuration( p_md->p_input_item ));
 630 }
 631
 632 static int media_parse(libvlc_media_t *media)
 633 {
 634     libvlc_int_t *libvlc = media->p_libvlc_instance->p_libvlc_int;
 635     input_item_t *item = media->p_input_item;
 636
 637     /* TODO: Fetch art on need basis. But how not to break compatibility? */
 638     libvlc_ArtRequest(libvlc, item, META_REQUEST_OPTION_NONE);
 639     return libvlc_MetaRequest(libvlc, item, META_REQUEST_OPTION_NONE);
 640 }
 641
 642 /**************************************************************************
 643  * Parse the media and wait.
 644  **************************************************************************/
 645 void
 646 libvlc_media_parse(libvlc_media_t *media)
 647 {
 648     vlc_mutex_lock(&media->parsed_lock);
 649     if (!media->has_asked_preparse)
 650     {
 651         media->has_asked_preparse = true;
 652         vlc_mutex_unlock(&media->parsed_lock);
 653
 654         if (media_parse(media))
 655             /* Parse failed: do not wait! */
 656             return;
 657         vlc_mutex_lock(&media->parsed_lock);
 658     }
 659
 660     while (!media->is_parsed)
 661         vlc_cond_wait(&media->parsed_cond, &media->parsed_lock);
 662     vlc_mutex_unlock(&media->parsed_lock);
 663 }
 664
 665 /**************************************************************************
 666  * Parse the media but do not wait.
 667  **************************************************************************/
 668 void
 669 libvlc_media_parse_async(libvlc_media_t *media)
 670 {
 671     bool needed;
 672
 673     vlc_mutex_lock(&media->parsed_lock);
 674     needed = !media->has_asked_preparse;
 675     media->has_asked_preparse = true;
 676     vlc_mutex_unlock(&media->parsed_lock);
 677
 678     if (needed)
 679         media_parse(media);
 680 }
 681
 682 /**************************************************************************
 683  * Get parsed status for media object.
 684  **************************************************************************/
 685 int
 686 libvlc_media_is_parsed(libvlc_media_t *media)
 687 {
 688     bool parsed;
 689
 690     vlc_mutex_lock(&media->parsed_lock);
 691     parsed = media->is_parsed;
 692     vlc_mutex_unlock(&media->parsed_lock);
 693     return parsed;
 694 }
 695
 696 /**************************************************************************
 697  * Sets media descriptor's user_data. user_data is specialized data
 698  * accessed by the host application, VLC.framework uses it as a pointer to
 699  * an native object that references a libvlc_media_t pointer
 700  **************************************************************************/
 701 void
 702 libvlc_media_set_user_data( libvlc_media_t * p_md, void * p_new_user_data )
 703 {
 704     assert( p_md );
 705     p_md->p_user_data = p_new_user_data;
 706 }
 707
 708 /**************************************************************************
 709  * Get media descriptor's user_data. user_data is specialized data
 710  * accessed by the host application, VLC.framework uses it as a pointer to
 711  * an native object that references a libvlc_media_t pointer
 712  **************************************************************************/
 713 void *
 714 libvlc_media_get_user_data( libvlc_media_t * p_md )
 715 {
 716     assert( p_md );
 717     return p_md->p_user_data;
 718 }
 719
 720 /**************************************************************************
 721  * Get media descriptor's elementary streams description
 722  **************************************************************************/
 723 int
 724 libvlc_media_get_tracks_info( libvlc_media_t *p_md, libvlc_media_track_info_t ** pp_es )
 725 {
 726     assert( p_md );
 727
 728     input_item_t *p_input_item = p_md->p_input_item;
 729     vlc_mutex_lock( &p_input_item->lock );
 730
 731     const int i_es = p_input_item->i_es;
 732     *pp_es = (i_es > 0) ? malloc( i_es * sizeof(libvlc_media_track_info_t) ) : NULL;
 733
 734     if( !*pp_es ) /* no ES, or OOM */
 735     {
 736         vlc_mutex_unlock( &p_input_item->lock );
 737         return 0;
 738     }
 739
 740     /* Fill array */
 741     for( int i = 0; i < i_es; i++ )
 742     {
 743         libvlc_media_track_info_t *p_mes = *pp_es+i;
 744         const es_format_t *p_es = p_input_item->es[i];
 745
 746         p_mes->i_codec = p_es->i_codec;
 747         p_mes->i_id = p_es->i_id;
 748
 749         p_mes->i_profile = p_es->i_profile;
 750         p_mes->i_level = p_es->i_level;
 751
 752         switch(p_es->i_cat)
 753         {
 754         case UNKNOWN_ES:
 755         default:
 756             p_mes->i_type = libvlc_track_unknown;
 757             break;
 758         case VIDEO_ES:
 759             p_mes->i_type = libvlc_track_video;
 760             p_mes->u.video.i_height = p_es->video.i_height;
 761             p_mes->u.video.i_width = p_es->video.i_width;
 762             break;
 763         case AUDIO_ES:
 764             p_mes->i_type = libvlc_track_audio;
 765             p_mes->u.audio.i_channels = p_es->audio.i_channels;
 766             p_mes->u.audio.i_rate = p_es->audio.i_rate;
 767             break;
 768         case SPU_ES:
 769             p_mes->i_type = libvlc_track_text;
 770             break;
 771         }
 772     }
 773
 774     vlc_mutex_unlock( &p_input_item->lock );
 775     return i_es;
 776 }
 777
 778 unsigned
 779 libvlc_media_tracks_get( libvlc_media_t *p_md, libvlc_media_track_t *** pp_es )
 780 {
 781     assert( p_md );
 782
 783     input_item_t *p_input_item = p_md->p_input_item;
 784     vlc_mutex_lock( &p_input_item->lock );
 785
 786     const int i_es = p_input_item->i_es;
 787     *pp_es = (i_es > 0) ? calloc( i_es, sizeof(**pp_es) ) : NULL;
 788
 789     if( !*pp_es ) /* no ES, or OOM */
 790     {
 791         vlc_mutex_unlock( &p_input_item->lock );
 792         return 0;
 793     }
 794
 795     /* Fill array */
 796     for( int i = 0; i < i_es; i++ )
 797     {
 798         libvlc_media_track_t *p_mes = calloc( 1, sizeof(*p_mes) );
 799         if ( p_mes )
 800         {
 801             p_mes->audio = malloc( __MAX(__MAX(sizeof(*p_mes->audio),
 802                                                sizeof(*p_mes->video)),
 803                                                sizeof(*p_mes->subtitle)) );
 804         }
 805         if ( !p_mes || !p_mes->audio )
 806         {
 807             libvlc_media_tracks_release( *pp_es, i_es );
 808             *pp_es = NULL;
 809             free( p_mes );
 810             vlc_mutex_unlock( &p_input_item->lock );
 811             return 0;
 812         }
 813         (*pp_es)[i] = p_mes;
 814
 815         const es_format_t *p_es = p_input_item->es[i];
 816
 817         p_mes->i_codec = p_es->i_codec;
 818         p_mes->i_original_fourcc = p_es->i_original_fourcc;
 819         p_mes->i_id = p_es->i_id;
 820
 821         p_mes->i_profile = p_es->i_profile;
 822         p_mes->i_level = p_es->i_level;
 823
 824         p_mes->i_bitrate = p_es->i_bitrate;
 825         p_mes->psz_language = p_es->psz_language != NULL ? strdup(p_es->psz_language) : NULL;
 826         p_mes->psz_description = p_es->psz_description != NULL ? strdup(p_es->psz_description) : NULL;
 827
 828         switch(p_es->i_cat)
 829         {
 830         case UNKNOWN_ES:
 831         default:
 832             p_mes->i_type = libvlc_track_unknown;
 833             break;
 834         case VIDEO_ES:
 835             p_mes->i_type = libvlc_track_video;
 836             p_mes->video->i_height = p_es->video.i_height;
 837             p_mes->video->i_width = p_es->video.i_width;
 838             p_mes->video->i_sar_num = p_es->video.i_sar_num;
 839             p_mes->video->i_sar_den = p_es->video.i_sar_den;
 840             p_mes->video->i_frame_rate_num = p_es->video.i_frame_rate;
 841             p_mes->video->i_frame_rate_den = p_es->video.i_frame_rate_base;
 842             break;
 843         case AUDIO_ES:
 844             p_mes->i_type = libvlc_track_audio;
 845             p_mes->audio->i_channels = p_es->audio.i_channels;
 846             p_mes->audio->i_rate = p_es->audio.i_rate;
 847             break;
 848         case SPU_ES:
 849             p_mes->i_type = libvlc_track_text;
 850             p_mes->subtitle->psz_encoding = p_es->subs.psz_encoding != NULL ?
 851                                             strdup(p_es->subs.psz_encoding) : NULL;
 852             break;
 853         }
 854     }
 855
 856     vlc_mutex_unlock( &p_input_item->lock );
 857     return i_es;
 858 }
 859
 860
 861 /**************************************************************************
 862  * Release media descriptor's elementary streams description array
 863  **************************************************************************/
 864 void libvlc_media_tracks_release( libvlc_media_track_t **p_tracks, unsigned i_count )
 865 {
 866     for( unsigned i = 0; i < i_count; ++i )
 867     {
 868         if ( !p_tracks[i] )
 869             continue;
 870         free( p_tracks[i]->psz_language );
 871         free( p_tracks[i]->psz_description );
 872         switch( p_tracks[i]->i_type )
 873         {
 874         case libvlc_track_audio:
 875             break;
 876         case libvlc_track_video:
 877             break;
 878         case libvlc_track_text:
 879             free( p_tracks[i]->subtitle->psz_encoding );
 880             break;
 881         case libvlc_track_unknown:
 882         default:
 883             break;
 884         }
 885         free( p_tracks[i]->audio );
 886         free( p_tracks[i] );
 887     }
 888     free( p_tracks );
 889 }