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

   1 /*****************************************************************************
   2  * media.c: Libvlc API media descripor management
   3  *****************************************************************************
   4  * Copyright (C) 2007 the VideoLAN team
   5  * $Id$
   6  *
   7  * Authors: Pierre d'Herbemont <pdherbemont@videolan.org>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  22  *****************************************************************************/
  23
  24 #ifdef HAVE_CONFIG_H
  25 # include "config.h"
  26 #endif
  27
  28 #include <assert.h>
  29
  30 #include <vlc/libvlc.h>
  31 #include <vlc/libvlc_media.h>
  32 #include <vlc/libvlc_media_list.h> // For the subitems, here for convenience
  33 #include <vlc/libvlc_events.h>
  34
  35 #include <vlc_common.h>
  36 #include <vlc_input.h>
  37 #include <vlc_meta.h>
  38 #include <vlc_playlist.h> /* For the preparser */
  39 #include <vlc_url.h>
  40
  41 #include "libvlc.h"
  42
  43 #include "libvlc_internal.h"
  44 #include "media_internal.h"
  45
  46 static const vlc_meta_type_t libvlc_to_vlc_meta[] =
  47 {
  48     [libvlc_meta_Title]        = vlc_meta_Title,
  49     [libvlc_meta_Artist]       = vlc_meta_Artist,
  50     [libvlc_meta_Genre]        = vlc_meta_Genre,
  51     [libvlc_meta_Copyright]    = vlc_meta_Copyright,
  52     [libvlc_meta_Album]        = vlc_meta_Album,
  53     [libvlc_meta_TrackNumber]  = vlc_meta_TrackNumber,
  54     [libvlc_meta_Description]  = vlc_meta_Description,
  55     [libvlc_meta_Rating]       = vlc_meta_Rating,
  56     [libvlc_meta_Date]         = vlc_meta_Date,
  57     [libvlc_meta_Setting]      = vlc_meta_Setting,
  58     [libvlc_meta_URL]          = vlc_meta_URL,
  59     [libvlc_meta_Language]     = vlc_meta_Language,
  60     [libvlc_meta_NowPlaying]   = vlc_meta_NowPlaying,
  61     [libvlc_meta_Publisher]    = vlc_meta_Publisher,
  62     [libvlc_meta_EncodedBy]    = vlc_meta_EncodedBy,
  63     [libvlc_meta_ArtworkURL]   = vlc_meta_ArtworkURL,
  64     [libvlc_meta_TrackID]      = vlc_meta_TrackID
  65 };
  66
  67 static const libvlc_meta_t vlc_to_libvlc_meta[] =
  68 {
  69     [vlc_meta_Title]        = libvlc_meta_Title,
  70     [vlc_meta_Artist]       = libvlc_meta_Artist,
  71     [vlc_meta_Genre]        = libvlc_meta_Genre,
  72     [vlc_meta_Copyright]    = libvlc_meta_Copyright,
  73     [vlc_meta_Album]        = libvlc_meta_Album,
  74     [vlc_meta_TrackNumber]  = libvlc_meta_TrackNumber,
  75     [vlc_meta_Description]  = libvlc_meta_Description,
  76     [vlc_meta_Rating]       = libvlc_meta_Rating,
  77     [vlc_meta_Date]         = libvlc_meta_Date,
  78     [vlc_meta_Setting]      = libvlc_meta_Setting,
  79     [vlc_meta_URL]          = libvlc_meta_URL,
  80     [vlc_meta_Language]     = libvlc_meta_Language,
  81     [vlc_meta_NowPlaying]   = libvlc_meta_NowPlaying,
  82     [vlc_meta_Publisher]    = libvlc_meta_Publisher,
  83     [vlc_meta_EncodedBy]    = libvlc_meta_EncodedBy,
  84     [vlc_meta_ArtworkURL]   = libvlc_meta_ArtworkURL,
  85     [vlc_meta_TrackID]      = libvlc_meta_TrackID
  86 };
  87
  88 /**************************************************************************
  89  * input_item_subitem_added (Private) (vlc event Callback)
  90  **************************************************************************/
  91 static void input_item_subitem_added( const vlc_event_t *p_event,
  92                                        void * user_data )
  93 {
  94     libvlc_media_t * p_md = user_data;
  95     libvlc_media_t * p_md_child;
  96     libvlc_event_t event;
  97
  98     p_md_child = libvlc_media_new_from_input_item(
  99                 p_md->p_libvlc_instance,
 100                 p_event->u.input_item_subitem_added.p_new_child );
 101
 102     /* Add this to our media list */
 103     if( !p_md->p_subitems )
 104     {
 105         p_md->p_subitems = libvlc_media_list_new( p_md->p_libvlc_instance );
 106         libvlc_media_list_set_media( p_md->p_subitems, p_md );
 107     }
 108     if( p_md->p_subitems )
 109     {
 110         libvlc_media_list_add_media( p_md->p_subitems, p_md_child );
 111     }
 112
 113     /* Construct the event */
 114     event.type = libvlc_MediaSubItemAdded;
 115     event.u.media_subitem_added.new_child = p_md_child;
 116
 117     /* Send the event */
 118     libvlc_event_send( p_md->p_event_manager, &event );
 119     libvlc_media_release( p_md_child );
 120 }
 121
 122 /**************************************************************************
 123  * input_item_meta_changed (Private) (vlc event Callback)
 124  **************************************************************************/
 125 static void input_item_meta_changed( const vlc_event_t *p_event,
 126                                      void * user_data )
 127 {
 128     libvlc_media_t * p_md = user_data;
 129     libvlc_event_t event;
 130
 131     /* Construct the event */
 132     event.type = libvlc_MediaMetaChanged;
 133     event.u.media_meta_changed.meta_type =
 134         vlc_to_libvlc_meta[p_event->u.input_item_meta_changed.meta_type];
 135
 136     /* Send the event */
 137     libvlc_event_send( p_md->p_event_manager, &event );
 138 }
 139
 140 /**************************************************************************
 141  * input_item_duration_changed (Private) (vlc event Callback)
 142  **************************************************************************/
 143 static void input_item_duration_changed( const vlc_event_t *p_event,
 144                                          void * user_data )
 145 {
 146     libvlc_media_t * p_md = user_data;
 147     libvlc_event_t event;
 148
 149     /* Construct the event */
 150     event.type = libvlc_MediaDurationChanged;
 151     event.u.media_duration_changed.new_duration =
 152         from_mtime(p_event->u.input_item_duration_changed.new_duration);
 153
 154     /* Send the event */
 155     libvlc_event_send( p_md->p_event_manager, &event );
 156 }
 157
 158 /**************************************************************************
 159  * input_item_preparsed_changed (Private) (vlc event Callback)
 160  **************************************************************************/
 161 static void input_item_preparsed_changed( const vlc_event_t *p_event,
 162                                           void * user_data )
 163 {
 164     libvlc_media_t * p_md = user_data;
 165     libvlc_event_t event;
 166
 167     /* Construct the event */
 168     event.type = libvlc_MediaPreparsedChanged;
 169     event.u.media_preparsed_changed.new_status =
 170         p_event->u.input_item_preparsed_changed.new_status;
 171
 172     /* Send the event */
 173     libvlc_event_send( p_md->p_event_manager, &event );
 174 }
 175
 176 /**************************************************************************
 177  * Install event handler (Private)
 178  **************************************************************************/
 179 static void install_input_item_observer( libvlc_media_t *p_md )
 180 {
 181     vlc_event_attach( &p_md->p_input_item->event_manager,
 182                       vlc_InputItemSubItemAdded,
 183                       input_item_subitem_added,
 184                       p_md );
 185     vlc_event_attach( &p_md->p_input_item->event_manager,
 186                       vlc_InputItemMetaChanged,
 187                       input_item_meta_changed,
 188                       p_md );
 189     vlc_event_attach( &p_md->p_input_item->event_manager,
 190                       vlc_InputItemDurationChanged,
 191                       input_item_duration_changed,
 192                       p_md );
 193     vlc_event_attach( &p_md->p_input_item->event_manager,
 194                       vlc_InputItemPreparsedChanged,
 195                       input_item_preparsed_changed,
 196                       p_md );
 197 }
 198
 199 /**************************************************************************
 200  * Uninstall event handler (Private)
 201  **************************************************************************/
 202 static void uninstall_input_item_observer( libvlc_media_t *p_md )
 203 {
 204     vlc_event_detach( &p_md->p_input_item->event_manager,
 205                       vlc_InputItemSubItemAdded,
 206                       input_item_subitem_added,
 207                       p_md );
 208     vlc_event_detach( &p_md->p_input_item->event_manager,
 209                       vlc_InputItemMetaChanged,
 210                       input_item_meta_changed,
 211                       p_md );
 212     vlc_event_detach( &p_md->p_input_item->event_manager,
 213                       vlc_InputItemDurationChanged,
 214                       input_item_duration_changed,
 215                       p_md );
 216     vlc_event_detach( &p_md->p_input_item->event_manager,
 217                       vlc_InputItemPreparsedChanged,
 218                       input_item_preparsed_changed,
 219                       p_md );
 220 }
 221
 222 /**************************************************************************
 223  * Preparse if not already done (Private)
 224  **************************************************************************/
 225 static void preparse_if_needed( libvlc_media_t *p_md )
 226 {
 227     /* XXX: need some locking here */
 228     if (!p_md->b_preparsed)
 229     {
 230         playlist_PreparseEnqueue(
 231                 libvlc_priv (p_md->p_libvlc_instance->p_libvlc_int)->p_playlist,
 232                 p_md->p_input_item );
 233         p_md->b_preparsed = true;
 234     }
 235 }
 236
 237 /**************************************************************************
 238  * Create a new media descriptor object from an input_item
 239  * (libvlc internal)
 240  * That's the generic constructor
 241  **************************************************************************/
 242 libvlc_media_t * libvlc_media_new_from_input_item(
 243                                    libvlc_instance_t *p_instance,
 244                                    input_item_t *p_input_item )
 245 {
 246     libvlc_media_t * p_md;
 247
 248     if (!p_input_item)
 249     {
 250         libvlc_printerr( "No input item given" );
 251         return NULL;
 252     }
 253
 254     p_md = calloc( 1, sizeof(libvlc_media_t) );
 255     if( !p_md )
 256     {
 257         libvlc_printerr( "Not enough memory" );
 258         return NULL;
 259     }
 260
 261     p_md->p_libvlc_instance = p_instance;
 262     p_md->p_input_item      = p_input_item;
 263     p_md->i_refcount        = 1;
 264
 265     p_md->state = libvlc_NothingSpecial;
 266
 267     /* A media descriptor can be a playlist. When you open a playlist
 268      * It can give a bunch of item to read. */
 269     p_md->p_subitems        = NULL;
 270
 271     p_md->p_event_manager = libvlc_event_manager_new( p_md, p_instance );
 272     if( unlikely(p_md->p_event_manager == NULL) )
 273     {
 274         free(p_md);
 275         return NULL;
 276     }
 277     libvlc_event_manager_register_event_type( p_md->p_event_manager,
 278         libvlc_MediaMetaChanged );
 279     libvlc_event_manager_register_event_type( p_md->p_event_manager,
 280         libvlc_MediaSubItemAdded );
 281     libvlc_event_manager_register_event_type( p_md->p_event_manager,
 282         libvlc_MediaFreed );
 283     libvlc_event_manager_register_event_type( p_md->p_event_manager,
 284         libvlc_MediaDurationChanged );
 285     libvlc_event_manager_register_event_type( p_md->p_event_manager,
 286         libvlc_MediaStateChanged );
 287     libvlc_event_manager_register_event_type( p_md->p_event_manager,
 288         libvlc_MediaPreparsedChanged );
 289
 290     vlc_gc_incref( p_md->p_input_item );
 291
 292     install_input_item_observer( p_md );
 293
 294     return p_md;
 295 }
 296
 297 /**************************************************************************
 298  * Create a new media descriptor object
 299  **************************************************************************/
 300 libvlc_media_t *libvlc_media_new_location( libvlc_instance_t *p_instance,
 301                                            const char * psz_mrl )
 302 {
 303     input_item_t * p_input_item;
 304     libvlc_media_t * p_md;
 305
 306     p_input_item = input_item_New( p_instance->p_libvlc_int, psz_mrl, NULL );
 307
 308     if (!p_input_item)
 309     {
 310         libvlc_printerr( "Not enough memory" );
 311         return NULL;
 312     }
 313
 314     p_md = libvlc_media_new_from_input_item( p_instance, p_input_item );
 315
 316     /* The p_input_item is retained in libvlc_media_new_from_input_item */
 317     vlc_gc_decref( p_input_item );
 318
 319     return p_md;
 320 }
 321
 322 libvlc_media_t *libvlc_media_new_path( libvlc_instance_t *p_instance,
 323                                        const char *path )
 324 {
 325     char *mrl = make_URI( path );
 326     if( unlikely(mrl == NULL) )
 327     {
 328         libvlc_printerr( "Not enough memory" );
 329         return NULL;
 330     }
 331
 332     libvlc_media_t *m = libvlc_media_new_location( p_instance, mrl );
 333     free( mrl );
 334     return m;
 335 }
 336
 337 /**************************************************************************
 338  * Create a new media descriptor object
 339  **************************************************************************/
 340 libvlc_media_t * libvlc_media_new_as_node( libvlc_instance_t *p_instance,
 341                                            const char * psz_name )
 342 {
 343     input_item_t * p_input_item;
 344     libvlc_media_t * p_md;
 345
 346     p_input_item = input_item_New( p_instance->p_libvlc_int, "vlc://nop", psz_name );
 347
 348     if (!p_input_item)
 349     {
 350         libvlc_printerr( "Not enough memory" );
 351         return NULL;
 352     }
 353
 354     p_md = libvlc_media_new_from_input_item( p_instance, p_input_item );
 355
 356     p_md->p_subitems = libvlc_media_list_new( p_md->p_libvlc_instance );
 357
 358     return p_md;
 359 }
 360
 361 /**************************************************************************
 362  * Add an option to the media descriptor,
 363  * that will be used to determine how the media_player will read the
 364  * media. This allow to use VLC advanced reading/streaming
 365  * options in a per-media basis
 366  *
 367  * The options are detailled in vlc --long-help, for instance "--sout-all"
 368  **************************************************************************/
 369 void libvlc_media_add_option( libvlc_media_t * p_md,
 370                               const char * psz_option )
 371 {
 372     libvlc_media_add_option_flag( p_md, psz_option,
 373                           VLC_INPUT_OPTION_UNIQUE|VLC_INPUT_OPTION_TRUSTED );
 374 }
 375
 376 /**************************************************************************
 377  * Same as libvlc_media_add_option but with configurable flags.
 378  **************************************************************************/
 379 void libvlc_media_add_option_flag( libvlc_media_t * p_md,
 380                                    const char * ppsz_option,
 381                                    unsigned i_flags )
 382 {
 383     input_item_AddOption( p_md->p_input_item, ppsz_option, i_flags );
 384 }
 385
 386 /**************************************************************************
 387  * Delete a media descriptor object
 388  **************************************************************************/
 389 void libvlc_media_release( libvlc_media_t *p_md )
 390 {
 391     if (!p_md)
 392         return;
 393
 394     p_md->i_refcount--;
 395
 396     if( p_md->i_refcount > 0 )
 397         return;
 398
 399     if( p_md->p_subitems )
 400         libvlc_media_list_release( p_md->p_subitems );
 401
 402     uninstall_input_item_observer( p_md );
 403     vlc_gc_decref( p_md->p_input_item );
 404
 405     /* Construct the event */
 406     libvlc_event_t event;
 407     event.type = libvlc_MediaFreed;
 408     event.u.media_freed.md = p_md;
 409
 410     /* Send the event */
 411     libvlc_event_send( p_md->p_event_manager, &event );
 412
 413     libvlc_event_manager_release( p_md->p_event_manager );
 414
 415     free( p_md );
 416 }
 417
 418 /**************************************************************************
 419  * Retain a media descriptor object
 420  **************************************************************************/
 421 void libvlc_media_retain( libvlc_media_t *p_md )
 422 {
 423     assert (p_md);
 424     p_md->i_refcount++;
 425 }
 426
 427 /**************************************************************************
 428  * Duplicate a media descriptor object
 429  **************************************************************************/
 430 libvlc_media_t *
 431 libvlc_media_duplicate( libvlc_media_t *p_md_orig )
 432 {
 433     return libvlc_media_new_from_input_item(
 434         p_md_orig->p_libvlc_instance, p_md_orig->p_input_item );
 435 }
 436
 437 /**************************************************************************
 438  * Get mrl from a media descriptor object
 439  **************************************************************************/
 440 char *
 441 libvlc_media_get_mrl( libvlc_media_t * p_md )
 442 {
 443     assert( p_md );
 444     return input_item_GetURI( p_md->p_input_item );
 445 }
 446
 447 /**************************************************************************
 448  * Getter for meta information
 449  **************************************************************************/
 450
 451 char *libvlc_media_get_meta( libvlc_media_t *p_md, libvlc_meta_t e_meta )
 452 {
 453     char * psz_meta;
 454
 455     assert( p_md );
 456     /* XXX: locking */
 457
 458     preparse_if_needed( p_md );
 459
 460     psz_meta = input_item_GetMeta( p_md->p_input_item,
 461                                    libvlc_to_vlc_meta[e_meta] );
 462
 463     if( e_meta == libvlc_meta_ArtworkURL && !psz_meta && !p_md->has_asked_art )
 464     {
 465         p_md->has_asked_art = true;
 466         playlist_AskForArtEnqueue(
 467                 libvlc_priv(p_md->p_libvlc_instance->p_libvlc_int)->p_playlist,
 468                 p_md->p_input_item );
 469     }
 470
 471     /* Should be integrated in core */
 472     if( !psz_meta && e_meta == libvlc_meta_Title && p_md->p_input_item->psz_name )
 473     {
 474         free( psz_meta );
 475         return strdup( p_md->p_input_item->psz_name );
 476     }
 477
 478     return psz_meta;
 479 }
 480
 481 /**************************************************************************
 482  * Setter for meta information
 483  **************************************************************************/
 484
 485 void libvlc_media_set_meta( libvlc_media_t *p_md, libvlc_meta_t e_meta, const char *psz_value )
 486 {
 487     assert( p_md );
 488     input_item_SetMeta( p_md->p_input_item, libvlc_to_vlc_meta[e_meta], psz_value );
 489 }
 490
 491 int libvlc_media_save_meta( libvlc_media_t *p_md )
 492 {
 493     assert( p_md );
 494     vlc_object_t *p_obj = VLC_OBJECT(libvlc_priv(
 495                             p_md->p_libvlc_instance->p_libvlc_int)->p_playlist);
 496     return input_item_WriteMeta( p_obj, p_md->p_input_item ) == VLC_SUCCESS;
 497 }
 498
 499 /**************************************************************************
 500  * Getter for state information
 501  * Can be error, playing, buffering, NothingSpecial.
 502  **************************************************************************/
 503
 504 libvlc_state_t
 505 libvlc_media_get_state( libvlc_media_t *p_md )
 506 {
 507     assert( p_md );
 508     return p_md->state;
 509 }
 510
 511 /**************************************************************************
 512  * Setter for state information (LibVLC Internal)
 513  **************************************************************************/
 514
 515 void
 516 libvlc_media_set_state( libvlc_media_t *p_md,
 517                                    libvlc_state_t state )
 518 {
 519     libvlc_event_t event;
 520
 521     p_md->state = state;
 522
 523     /* Construct the event */
 524     event.type = libvlc_MediaStateChanged;
 525     event.u.media_state_changed.new_state = state;
 526
 527     /* Send the event */
 528     libvlc_event_send( p_md->p_event_manager, &event );
 529 }
 530
 531 /**************************************************************************
 532  * subitems
 533  **************************************************************************/
 534 libvlc_media_list_t *
 535 libvlc_media_subitems( libvlc_media_t * p_md )
 536 {
 537     if( p_md->p_subitems )
 538         libvlc_media_list_retain( p_md->p_subitems );
 539     return p_md->p_subitems;
 540 }
 541
 542 /**************************************************************************
 543  * Getter for statistics information
 544  **************************************************************************/
 545 int libvlc_media_get_stats( libvlc_media_t *p_md,
 546                             libvlc_media_stats_t *p_stats )
 547 {
 548     if( !p_md->p_input_item )
 549         return false;
 550
 551     input_stats_t *p_itm_stats = p_md->p_input_item->p_stats;
 552     vlc_mutex_lock( &p_itm_stats->lock );
 553     p_stats->i_read_bytes = p_itm_stats->i_read_bytes;
 554     p_stats->f_input_bitrate = p_itm_stats->f_input_bitrate;
 555
 556     p_stats->i_demux_read_bytes = p_itm_stats->i_demux_read_bytes;
 557     p_stats->f_demux_bitrate = p_itm_stats->f_demux_bitrate;
 558     p_stats->i_demux_corrupted = p_itm_stats->i_demux_corrupted;
 559     p_stats->i_demux_discontinuity = p_itm_stats->i_demux_discontinuity;
 560
 561     p_stats->i_decoded_video = p_itm_stats->i_decoded_video;
 562     p_stats->i_decoded_audio = p_itm_stats->i_decoded_audio;
 563
 564     p_stats->i_displayed_pictures = p_itm_stats->i_displayed_pictures;
 565     p_stats->i_lost_pictures = p_itm_stats->i_lost_pictures;
 566
 567     p_stats->i_played_abuffers = p_itm_stats->i_played_abuffers;
 568     p_stats->i_lost_abuffers = p_itm_stats->i_lost_abuffers;
 569
 570     p_stats->i_sent_packets = p_itm_stats->i_sent_packets;
 571     p_stats->i_sent_bytes = p_itm_stats->i_sent_bytes;
 572     p_stats->f_send_bitrate = p_itm_stats->f_send_bitrate;
 573     vlc_mutex_unlock( &p_itm_stats->lock );
 574     return true;
 575 }
 576
 577 /**************************************************************************
 578  * event_manager
 579  **************************************************************************/
 580 libvlc_event_manager_t *
 581 libvlc_media_event_manager( libvlc_media_t * p_md )
 582 {
 583     assert( p_md );
 584
 585     return p_md->p_event_manager;
 586 }
 587
 588 /**************************************************************************
 589  * Get duration of media object (in ms)
 590  **************************************************************************/
 591 int64_t
 592 libvlc_media_get_duration( libvlc_media_t * p_md )
 593 {
 594     assert( p_md );
 595
 596     if( !p_md->p_input_item )
 597     {
 598         libvlc_printerr( "No input item" );
 599         return -1;
 600     }
 601
 602     preparse_if_needed( p_md );
 603
 604     if (!input_item_IsPreparsed( p_md->p_input_item ))
 605         return -1;
 606
 607     return from_mtime(input_item_GetDuration( p_md->p_input_item ));
 608 }
 609
 610 /**************************************************************************
 611  * Get preparsed status for media object.
 612  **************************************************************************/
 613 int
 614 libvlc_media_is_preparsed( libvlc_media_t * p_md )
 615 {
 616     assert( p_md );
 617
 618     if( !p_md->p_input_item )
 619         return false;
 620
 621     return input_item_IsPreparsed( p_md->p_input_item );
 622 }
 623
 624 /**************************************************************************
 625  * Sets media descriptor's user_data. user_data is specialized data
 626  * accessed by the host application, VLC.framework uses it as a pointer to
 627  * an native object that references a libvlc_media_t pointer
 628  **************************************************************************/
 629 void
 630 libvlc_media_set_user_data( libvlc_media_t * p_md, void * p_new_user_data )
 631 {
 632     assert( p_md );
 633     p_md->p_user_data = p_new_user_data;
 634 }
 635
 636 /**************************************************************************
 637  * Get media descriptor's user_data. user_data is specialized data
 638  * accessed by the host application, VLC.framework uses it as a pointer to
 639  * an native object that references a libvlc_media_t pointer
 640  **************************************************************************/
 641 void *
 642 libvlc_media_get_user_data( libvlc_media_t * p_md )
 643 {
 644     assert( p_md );
 645     return p_md->p_user_data;
 646 }
 647
 648 /**************************************************************************
 649  * Get media descriptor's elementary streams description
 650  **************************************************************************/
 651 int
 652 libvlc_media_get_es( libvlc_media_t *p_md, libvlc_media_es_t ** pp_es )
 653 {
 654     assert( p_md );
 655
 656     input_item_t *p_input_item = p_md->p_input_item;
 657     vlc_mutex_lock( &p_input_item->lock );
 658
 659     const int i_es = p_input_item->i_es;
 660     *pp_es = (i_es > 0) ? malloc( i_es * sizeof(libvlc_media_es_t) ) : NULL;
 661
 662     if( !pp_es ) /* no ES, or OOM */
 663     {
 664         vlc_mutex_unlock( &p_input_item->lock );
 665         return 0;
 666     }
 667
 668     /* Fill array */
 669     for( int i = 0; i < i_es; i++ )
 670     {
 671         libvlc_media_es_t *p_mes = *pp_es+i;
 672         const es_format_t *p_es = p_input_item->es[i];
 673
 674         p_mes->i_channels = p_mes->i_rate = 0;
 675         p_mes->i_width = p_mes->i_height = 0;
 676
 677
 678         p_mes->i_codec = p_es->i_codec;
 679         p_mes->i_id = p_es->i_id;
 680
 681         p_mes->i_profile = p_es->i_profile;
 682         p_mes->i_level = p_es->i_level;
 683
 684         switch(p_es->i_cat)
 685         {
 686         case UNKNOWN_ES:
 687         default:
 688             p_mes->i_type = libvlc_es_unknown;
 689             break;
 690         case VIDEO_ES:
 691             p_mes->i_type = libvlc_es_video;
 692             p_mes->i_height = p_es->video.i_height;
 693             p_mes->i_width = p_es->video.i_width;
 694             break;
 695         case AUDIO_ES:
 696             p_mes->i_type = libvlc_es_audio;
 697             p_mes->i_channels = p_es->audio.i_channels;
 698             p_mes->i_rate = p_es->audio.i_rate;
 699             break;
 700         case SPU_ES:
 701             p_mes->i_type = libvlc_es_text;
 702             break;
 703         }
 704     }
 705
 706     vlc_mutex_unlock( &p_input_item->lock );
 707     return i_es;
 708 }