1 /*****************************************************************************
2 * libvlc_media.h: libvlc external API
3 *****************************************************************************
4 * Copyright (C) 1998-2009 VLC authors and VideoLAN
7 * Authors: Clément Stenac <zorglub@videolan.org>
8 * Jean-Paul Saman <jpsaman@videolan.org>
9 * Pierre d'Herbemont <pdherbemont@videolan.org>
11 * This program is free software; you can redistribute it and/or modify it
12 * under the terms of the GNU Lesser General Public License as published by
13 * the Free Software Foundation; either version 2.1 of the License, or
14 * (at your option) any later version.
16 * This program is distributed in the hope that it will be useful,
17 * but WITHOUT ANY WARRANTY; without even the implied warranty of
18 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
19 * GNU Lesser General Public License for more details.
21 * You should have received a copy of the GNU Lesser General Public License
22 * along with this program; if not, write to the Free Software Foundation,
23 * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
24 *****************************************************************************/
28 * This file defines libvlc_media external API
31 #ifndef VLC_LIBVLC_MEDIA_H
32 #define VLC_LIBVLC_MEDIA_H 1
38 /** \defgroup libvlc_media LibVLC media
40 * @ref libvlc_media_t is an abstract representation of a playable media.
41 * It consists of a media location and various optional meta data.
45 typedef struct libvlc_media_t libvlc_media_t;
47 /** defgroup libvlc_meta LibVLC meta data
48 * \ingroup libvlc_media
52 /** Meta data types */
53 typedef enum libvlc_meta_t {
57 libvlc_meta_Copyright,
59 libvlc_meta_TrackNumber,
60 libvlc_meta_Description,
66 libvlc_meta_NowPlaying,
67 libvlc_meta_Publisher,
68 libvlc_meta_EncodedBy,
69 libvlc_meta_ArtworkURL,
71 /* Add new meta types HERE */
77 * Note the order of libvlc_state_t enum must match exactly the order of
78 * \see mediacontrol_PlayerStatus, \see input_state_e enums,
79 * and VideoLAN.LibVLC.State (at bindings/cil/src/media.cs).
81 * Expected states by web plugins are:
82 * IDLE/CLOSE=0, OPENING=1, BUFFERING=2, PLAYING=3, PAUSED=4,
83 * STOPPING=5, ENDED=6, ERROR=7
85 typedef enum libvlc_state_t
87 libvlc_NothingSpecial=0,
99 libvlc_media_option_trusted = 0x2,
100 libvlc_media_option_unique = 0x100
103 typedef enum libvlc_track_type_t
105 libvlc_track_unknown = -1,
106 libvlc_track_audio = 0,
107 libvlc_track_video = 1,
108 libvlc_track_text = 2
109 } libvlc_track_type_t;
111 /** defgroup libvlc_media_stats_t LibVLC media statistics
112 * \ingroup libvlc_media
115 typedef struct libvlc_media_stats_t
119 float f_input_bitrate;
122 int i_demux_read_bytes;
123 float f_demux_bitrate;
124 int i_demux_corrupted;
125 int i_demux_discontinuity;
132 int i_displayed_pictures;
136 int i_played_abuffers;
142 float f_send_bitrate;
143 } libvlc_media_stats_t;
146 typedef struct libvlc_media_track_info_t
151 libvlc_track_type_t i_type;
170 } libvlc_media_track_info_t;
174 * Create a media with a certain given media resource location,
175 * for instance a valid URL.
177 * \note To refer to a local file with this function,
178 * the file://... URI syntax <b>must</b> be used (see IETF RFC3986).
179 * We recommend using libvlc_media_new_path() instead when dealing with
182 * \see libvlc_media_release
184 * \param p_instance the instance
185 * \param psz_mrl the media location
186 * \return the newly created media or NULL on error
188 LIBVLC_API libvlc_media_t *libvlc_media_new_location(
189 libvlc_instance_t *p_instance,
190 const char * psz_mrl );
193 * Create a media for a certain file path.
195 * \see libvlc_media_release
197 * \param p_instance the instance
198 * \param path local filesystem path
199 * \return the newly created media or NULL on error
201 LIBVLC_API libvlc_media_t *libvlc_media_new_path(
202 libvlc_instance_t *p_instance,
206 * Create a media for an already open file descriptor.
207 * The file descriptor shall be open for reading (or reading and writing).
209 * Regular file descriptors, pipe read descriptors and character device
210 * descriptors (including TTYs) are supported on all platforms.
211 * Block device descriptors are supported where available.
212 * Directory descriptors are supported on systems that provide fdopendir().
213 * Sockets are supported on all platforms where they are file descriptors,
214 * i.e. all except Windows.
216 * \note This library will <b>not</b> automatically close the file descriptor
217 * under any circumstance. Nevertheless, a file descriptor can usually only be
218 * rendered once in a media player. To render it a second time, the file
219 * descriptor should probably be rewound to the beginning with lseek().
221 * \see libvlc_media_release
223 * \version LibVLC 1.1.5 and later.
225 * \param p_instance the instance
226 * \param fd open file descriptor
227 * \return the newly created media or NULL on error
229 LIBVLC_API libvlc_media_t *libvlc_media_new_fd(
230 libvlc_instance_t *p_instance,
235 * Create a media as an empty node with a given name.
237 * \see libvlc_media_release
239 * \param p_instance the instance
240 * \param psz_name the name of the node
241 * \return the new empty media or NULL on error
243 LIBVLC_API libvlc_media_t *libvlc_media_new_as_node(
244 libvlc_instance_t *p_instance,
245 const char * psz_name );
248 * Add an option to the media.
250 * This option will be used to determine how the media_player will
251 * read the media. This allows to use VLC's advanced
252 * reading/streaming options on a per-media basis.
254 * \note The options are listed in 'vlc --long-help' from the command line,
255 * e.g. "-sout-all". Keep in mind that available options and their semantics
256 * vary across LibVLC versions and builds.
257 * \warning Not all options affects libvlc_media_t objects:
258 * Specifically, due to architectural issues most audio and video options,
259 * such as text renderer options, have no effects on an individual media.
260 * These options must be set through libvlc_new() instead.
262 * \param p_md the media descriptor
263 * \param ppsz_options the options (as a string)
265 LIBVLC_API void libvlc_media_add_option(
266 libvlc_media_t *p_md,
267 const char * ppsz_options );
270 * Add an option to the media with configurable flags.
272 * This option will be used to determine how the media_player will
273 * read the media. This allows to use VLC's advanced
274 * reading/streaming options on a per-media basis.
276 * The options are detailed in vlc --long-help, for instance
277 * "--sout-all". Note that all options are not usable on medias:
278 * specifically, due to architectural issues, video-related options
279 * such as text renderer options cannot be set on a single media. They
280 * must be set on the whole libvlc instance instead.
282 * \param p_md the media descriptor
283 * \param ppsz_options the options (as a string)
284 * \param i_flags the flags for this option
286 LIBVLC_API void libvlc_media_add_option_flag(
287 libvlc_media_t *p_md,
288 const char * ppsz_options,
293 * Retain a reference to a media descriptor object (libvlc_media_t). Use
294 * libvlc_media_release() to decrement the reference count of a
295 * media descriptor object.
297 * \param p_md the media descriptor
299 LIBVLC_API void libvlc_media_retain( libvlc_media_t *p_md );
302 * Decrement the reference count of a media descriptor object. If the
303 * reference count is 0, then libvlc_media_release() will release the
304 * media descriptor object. It will send out an libvlc_MediaFreed event
305 * to all listeners. If the media descriptor object has been released it
306 * should not be used again.
308 * \param p_md the media descriptor
310 LIBVLC_API void libvlc_media_release( libvlc_media_t *p_md );
314 * Get the media resource locator (mrl) from a media descriptor object
316 * \param p_md a media descriptor object
317 * \return string with mrl of media descriptor object
319 LIBVLC_API char *libvlc_media_get_mrl( libvlc_media_t *p_md );
322 * Duplicate a media descriptor object.
324 * \param p_md a media descriptor object.
326 LIBVLC_API libvlc_media_t *libvlc_media_duplicate( libvlc_media_t *p_md );
329 * Read the meta of the media.
331 * If the media has not yet been parsed this will return NULL.
333 * This methods automatically calls libvlc_media_parse_async(), so after calling
334 * it you may receive a libvlc_MediaMetaChanged event. If you prefer a synchronous
335 * version ensure that you call libvlc_media_parse() before get_meta().
337 * \see libvlc_media_parse
338 * \see libvlc_media_parse_async
339 * \see libvlc_MediaMetaChanged
341 * \param p_md the media descriptor
342 * \param e_meta the meta to read
343 * \return the media's meta
345 LIBVLC_API char *libvlc_media_get_meta( libvlc_media_t *p_md,
346 libvlc_meta_t e_meta );
349 * Set the meta of the media (this function will not save the meta, call
350 * libvlc_media_save_meta in order to save the meta)
352 * \param p_md the media descriptor
353 * \param e_meta the meta to write
354 * \param psz_value the media's meta
356 LIBVLC_API void libvlc_media_set_meta( libvlc_media_t *p_md,
357 libvlc_meta_t e_meta,
358 const char *psz_value );
362 * Save the meta previously set
364 * \param p_md the media desriptor
365 * \return true if the write operation was successful
367 LIBVLC_API int libvlc_media_save_meta( libvlc_media_t *p_md );
371 * Get current state of media descriptor object. Possible media states
372 * are defined in libvlc_structures.c ( libvlc_NothingSpecial=0,
373 * libvlc_Opening, libvlc_Buffering, libvlc_Playing, libvlc_Paused,
374 * libvlc_Stopped, libvlc_Ended,
377 * \see libvlc_state_t
378 * \param p_md a media descriptor object
379 * \return state of media descriptor object
381 LIBVLC_API libvlc_state_t libvlc_media_get_state(
382 libvlc_media_t *p_md );
386 * Get the current statistics about the media
387 * \param p_md: media descriptor object
388 * \param p_stats: structure that contain the statistics about the media
389 * (this structure must be allocated by the caller)
390 * \return true if the statistics are available, false otherwise
392 * \libvlc_return_bool
394 LIBVLC_API int libvlc_media_get_stats( libvlc_media_t *p_md,
395 libvlc_media_stats_t *p_stats );
397 /* The following method uses libvlc_media_list_t, however, media_list usage is optionnal
398 * and this is here for convenience */
399 #define VLC_FORWARD_DECLARE_OBJECT(a) struct a
402 * Get subitems of media descriptor object. This will increment
403 * the reference count of supplied media descriptor object. Use
404 * libvlc_media_list_release() to decrement the reference counting.
406 * \param p_md media descriptor object
407 * \return list of media descriptor subitems or NULL
409 LIBVLC_API VLC_FORWARD_DECLARE_OBJECT(libvlc_media_list_t *)
410 libvlc_media_subitems( libvlc_media_t *p_md );
413 * Get event manager from media descriptor object.
414 * NOTE: this function doesn't increment reference counting.
416 * \param p_md a media descriptor object
417 * \return event manager object
419 LIBVLC_API libvlc_event_manager_t *
420 libvlc_media_event_manager( libvlc_media_t *p_md );
423 * Get duration (in ms) of media descriptor object item.
425 * \param p_md media descriptor object
426 * \return duration of media item or -1 on error
428 LIBVLC_API libvlc_time_t
429 libvlc_media_get_duration( libvlc_media_t *p_md );
434 * This fetches (local) meta data and tracks information.
435 * The method is synchronous.
437 * \see libvlc_media_parse_async
438 * \see libvlc_media_get_meta
439 * \see libvlc_media_get_tracks_info
441 * \param p_md media descriptor object
444 libvlc_media_parse( libvlc_media_t *p_md );
449 * This fetches (local) meta data and tracks information.
450 * The method is the asynchronous of libvlc_media_parse().
452 * To track when this is over you can listen to libvlc_MediaParsedChanged
453 * event. However if the media was already parsed you will not receive this
456 * \see libvlc_media_parse
457 * \see libvlc_MediaParsedChanged
458 * \see libvlc_media_get_meta
459 * \see libvlc_media_get_tracks_info
461 * \param p_md media descriptor object
464 libvlc_media_parse_async( libvlc_media_t *p_md );
467 * Get Parsed status for media descriptor object.
469 * \see libvlc_MediaParsedChanged
471 * \param p_md media descriptor object
472 * \return true if media object has been parsed otherwise it returns false
474 * \libvlc_return_bool
477 libvlc_media_is_parsed( libvlc_media_t *p_md );
480 * Sets media descriptor's user_data. user_data is specialized data
481 * accessed by the host application, VLC.framework uses it as a pointer to
482 * an native object that references a libvlc_media_t pointer
484 * \param p_md media descriptor object
485 * \param p_new_user_data pointer to user data
488 libvlc_media_set_user_data( libvlc_media_t *p_md, void *p_new_user_data );
491 * Get media descriptor's user_data. user_data is specialized data
492 * accessed by the host application, VLC.framework uses it as a pointer to
493 * an native object that references a libvlc_media_t pointer
495 * \param p_md media descriptor object
497 LIBVLC_API void *libvlc_media_get_user_data( libvlc_media_t *p_md );
500 * Get media descriptor's elementary streams description
502 * Note, you need to call libvlc_media_parse() or play the media at least once
503 * before calling this function.
504 * Not doing this will result in an empty array.
506 * \param p_md media descriptor object
507 * \param tracks address to store an allocated array of Elementary Streams
508 * descriptions (must be freed by the caller) [OUT]
510 * \return the number of Elementary Streams
513 int libvlc_media_get_tracks_info( libvlc_media_t *p_md,
514 libvlc_media_track_info_t **tracks );
522 #endif /* VLC_LIBVLC_MEDIA_H */