1 /*****************************************************************************
2 * libvlc.h: libvlc external API
3 *****************************************************************************
4 * Copyright (C) 1998-2009 the VideoLAN team
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
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 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 General Public License for more details.
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
24 *****************************************************************************/
28 * This file defines libvlc external API
32 * \defgroup libvlc libvlc
33 * This is libvlc, the base library of the VLC program.
39 #define VLC_LIBVLC_H 1
41 #if defined (WIN32) && defined (DLL_EXPORT)
42 # define VLC_PUBLIC_API __declspec(dllexport)
44 # define VLC_PUBLIC_API
48 /* Avoid unuseful warnings from libvlc with our deprecated APIs */
49 # define VLC_DEPRECATED_API VLC_PUBLIC_API
50 #elif defined(__GNUC__) && \
51 (__GNUC__ > 3 || __GNUC__ == 3 && __GNUC_MINOR__ > 0)
52 # define VLC_DEPRECATED_API VLC_PUBLIC_API __attribute__((deprecated))
54 # define VLC_DEPRECATED_API VLC_PUBLIC_API
62 #include <vlc/libvlc_structures.h>
64 /*****************************************************************************
66 *****************************************************************************/
67 /** \defgroup libvlc_exception libvlc_exception
68 * \ingroup libvlc_core
69 * LibVLC Exceptions handling
74 * Initialize an exception structure. This can be called several times to
75 * reuse an exception structure.
77 * \param p_exception the exception to initialize
79 VLC_PUBLIC_API void libvlc_exception_init( libvlc_exception_t *p_exception );
82 * Has an exception been raised?
84 * \param p_exception the exception to query
85 * \return 0 if the exception was raised, 1 otherwise
88 libvlc_exception_raised( const libvlc_exception_t *p_exception );
93 * \param p_exception the exception to raise
96 libvlc_exception_raise( libvlc_exception_t *p_exception );
99 * Clear an exception object so it can be reused.
100 * The exception object must have be initialized.
102 * \param p_exception the exception to clear
104 VLC_PUBLIC_API void libvlc_exception_clear( libvlc_exception_t * );
108 /*****************************************************************************
110 *****************************************************************************/
111 /** \defgroup libvlc_error libvlc_error
112 * \ingroup libvlc_core
113 * LibVLC error handling
118 * A human-readable error message for the last LibVLC error in the calling
119 * thread. The resulting string is valid until another error occurs (at least
120 * until the next LibVLC call).
123 * This will be NULL if there was no error.
125 VLC_PUBLIC_API const char *libvlc_errmsg (void);
128 * Clears the LibVLC error status for the current thread. This is optional.
129 * By default, the error status is automatically overriden when a new error
130 * occurs, and destroyed when the thread exits.
132 VLC_PUBLIC_API void libvlc_clearerr (void);
135 * Sets the LibVLC error status and message for the current thread.
136 * Any previous error is overriden.
137 * @return a nul terminated string in any case
139 const char *libvlc_vprinterr (const char *fmt, va_list ap);
142 * Sets the LibVLC error status and message for the current thread.
143 * Any previous error is overriden.
144 * @return a nul terminated string in any case
146 const char *libvlc_printerr (const char *fmt, ...);
151 /*****************************************************************************
153 *****************************************************************************/
155 /** \defgroup libvlc_core libvlc_core
162 * Create and initialize a libvlc instance.
164 * \param argc the number of arguments
165 * \param argv command-line-type arguments. argv[0] must be the path of the
167 * \param p_e an initialized exception pointer
168 * \return the libvlc instance
170 VLC_PUBLIC_API libvlc_instance_t *
171 libvlc_new( int , const char *const *, libvlc_exception_t *);
174 * Decrement the reference count of a libvlc instance, and destroy it
175 * if it reaches zero.
177 * \param p_instance the instance to destroy
179 VLC_PUBLIC_API void libvlc_release( libvlc_instance_t * );
182 * Increments the reference count of a libvlc instance.
183 * The initial reference count is 1 after libvlc_new() returns.
185 * \param p_instance the instance to reference
187 VLC_PUBLIC_API void libvlc_retain( libvlc_instance_t * );
190 * Try to start a user interface for the libvlc instance.
192 * \param p_instance the instance
193 * \param name interface name, or NULL for default
194 * \return 0 on success, -1 on error.
197 int libvlc_add_intf( libvlc_instance_t *p_instance, const char *name );
200 * Waits until an interface causes the instance to exit.
201 * You should start at least one interface first, using libvlc_add_intf().
203 * \param p_instance the instance
206 void libvlc_wait( libvlc_instance_t *p_instance );
209 * Retrieve libvlc version.
211 * Example: "0.9.0-git Grishenko"
213 * \return a string containing the libvlc version
215 VLC_PUBLIC_API const char * libvlc_get_version(void);
218 * Retrieve libvlc compiler version.
220 * Example: "gcc version 4.2.3 (Ubuntu 4.2.3-2ubuntu6)"
222 * \return a string containing the libvlc compiler version
224 VLC_PUBLIC_API const char * libvlc_get_compiler(void);
227 * Retrieve libvlc changeset.
229 * Example: "aa9bce0bc4"
231 * \return a string containing the libvlc changeset
233 VLC_PUBLIC_API const char * libvlc_get_changeset(void);
238 * Get the internal main VLC object.
239 * Use of this function is usually a hack and should be avoided.
241 * You will need to link with libvlccore to make any use of the underlying VLC
242 * object. The libvlccore programming and binary interfaces are not stable.
244 * Remember to release the object with vlc_object_release().
246 * \param p_instance the libvlc instance
247 * @return a VLC object of type "libvlc"
249 VLC_PUBLIC_API struct vlc_object_t *libvlc_get_vlc_instance(libvlc_instance_t *p_instance);
252 * Frees an heap allocation (char *) returned by a LibVLC API.
253 * If you know you're using the same underlying C run-time as the LibVLC
254 * implementation, then you can call ANSI C free() directly instead.
256 * \param ptr the pointer
258 VLC_PUBLIC_API void libvlc_free( void *ptr );
262 /*****************************************************************************
264 *****************************************************************************/
266 /** \defgroup libvlc_event libvlc_event
267 * \ingroup libvlc_core
273 * Event manager that belongs to a libvlc object, and from whom events can
277 typedef struct libvlc_event_manager_t libvlc_event_manager_t;
278 typedef struct libvlc_event_t libvlc_event_t;
279 typedef uint32_t libvlc_event_type_t;
282 * Callback function notification
283 * \param p_event the event triggering the callback
286 typedef void ( *libvlc_callback_t )( const libvlc_event_t *, void * );
289 * Register for an event notification.
291 * \param p_event_manager the event manager to which you want to attach to.
292 * Generally it is obtained by vlc_my_object_event_manager() where
293 * my_object is the object you want to listen to.
294 * \param i_event_type the desired event to which we want to listen
295 * \param f_callback the function to call when i_event_type occurs
296 * \param user_data user provided data to carry with the event
297 * \param p_e an initialized exception pointer
299 VLC_PUBLIC_API void libvlc_event_attach( libvlc_event_manager_t *p_event_manager,
300 libvlc_event_type_t i_event_type,
301 libvlc_callback_t f_callback,
303 libvlc_exception_t *p_e );
306 * Unregister an event notification.
308 * \param p_event_manager the event manager
309 * \param i_event_type the desired event to which we want to unregister
310 * \param f_callback the function to call when i_event_type occurs
311 * \param p_user_data user provided data to carry with the event
312 * \param p_e an initialized exception pointer
314 VLC_PUBLIC_API void libvlc_event_detach( libvlc_event_manager_t *p_event_manager,
315 libvlc_event_type_t i_event_type,
316 libvlc_callback_t f_callback,
318 libvlc_exception_t *p_e );
321 * Get an event's type name.
323 * \param i_event_type the desired event
325 VLC_PUBLIC_API const char * libvlc_event_type_name( libvlc_event_type_t event_type );
329 /*****************************************************************************
330 * Message log handling
331 *****************************************************************************/
333 /** \defgroup libvlc_log libvlc_log
334 * \ingroup libvlc_core
335 * LibVLC Message Logging
340 * Return the VLC messaging verbosity level.
342 * \param p_instance libvlc instance
343 * \return verbosity level for messages
345 VLC_PUBLIC_API unsigned libvlc_get_log_verbosity( const libvlc_instance_t *p_instance );
348 * Set the VLC messaging verbosity level.
350 * \param p_instance libvlc log instance
351 * \param level log level
353 VLC_PUBLIC_API void libvlc_set_log_verbosity( libvlc_instance_t *p_instance, unsigned level );
356 * Open a VLC message log instance.
358 * \param p_instance libvlc instance
359 * \param p_e an initialized exception pointer
360 * \return log message instance
362 VLC_PUBLIC_API libvlc_log_t *libvlc_log_open( libvlc_instance_t *, libvlc_exception_t *);
365 * Close a VLC message log instance.
367 * \param p_log libvlc log instance or NULL
369 VLC_PUBLIC_API void libvlc_log_close( libvlc_log_t *p_log );
372 * Returns the number of messages in a log instance.
374 * \param p_log libvlc log instance or NULL
375 * \return number of log messages, 0 if p_log is NULL
377 VLC_PUBLIC_API unsigned libvlc_log_count( const libvlc_log_t *p_log );
380 * Clear a log instance.
382 * All messages in the log are removed. The log should be cleared on a
383 * regular basis to avoid clogging.
385 * \param p_log libvlc log instance or NULL
387 VLC_PUBLIC_API void libvlc_log_clear( libvlc_log_t *p_log );
390 * Allocate and returns a new iterator to messages in log.
392 * \param p_log libvlc log instance
393 * \param p_e an initialized exception pointer
394 * \return log iterator object
396 VLC_PUBLIC_API libvlc_log_iterator_t *libvlc_log_get_iterator( const libvlc_log_t *, libvlc_exception_t *);
399 * Release a previoulsy allocated iterator.
401 * \param p_iter libvlc log iterator or NULL
403 VLC_PUBLIC_API void libvlc_log_iterator_free( libvlc_log_iterator_t *p_iter );
406 * Return whether log iterator has more messages.
408 * \param p_iter libvlc log iterator or NULL
409 * \return true if iterator has more message objects, else false
411 VLC_PUBLIC_API int libvlc_log_iterator_has_next( const libvlc_log_iterator_t *p_iter );
414 * Return the next log message.
416 * The message contents must not be freed
418 * \param p_iter libvlc log iterator or NULL
419 * \param p_buffer log buffer
420 * \param p_e an initialized exception pointer
421 * \return log message object
423 VLC_PUBLIC_API libvlc_log_message_t *libvlc_log_iterator_next( libvlc_log_iterator_t *p_iter,
424 libvlc_log_message_t *p_buffer,
425 libvlc_exception_t *p_e );
433 #endif /* <vlc/libvlc.h> */