libvlc.h

VLC Player Source Code

/*****************************************************************************
 * libvlc.h:  libvlc external API
 *****************************************************************************
 * Copyright (C) 1998-2005 the VideoLAN team
 * $Id$
 *
 * Authors: Clément Stenac <[e-mail]>
 *          Jean-Paul Saman <[e-mail]>
 *          Pierre d'Herbemont <[e-mail]>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
 *****************************************************************************/

/**
 * \file
 * This file defines libvlc external API
 */

/**
 * \defgroup libvlc libvlc
 * This is libvlc, the base library of the VLC program.
 *
 * @{
 */

#ifndef VLC_LIBVLC_H
#define VLC_LIBVLC_H 1

#if defined (WIN32) && defined (DLL_EXPORT)
# define VLC_PUBLIC_API __declspec(dllexport)
#else
# define VLC_PUBLIC_API
#endif

#ifdef __LIBVLC__
/* Avoid unuseful warnings from libvlc with our deprecated APIs */
#   define VLC_DEPRECATED_API VLC_PUBLIC_API
#elif defined(__GNUC__) && \
      (__GNUC__ > 3 || __GNUC__ == 3 && __GNUC_MINOR__ > 0)
# define VLC_DEPRECATED_API VLC_PUBLIC_API __attribute__((deprecated))
#else
# define VLC_DEPRECATED_API VLC_PUBLIC_API
#endif

# ifdef __cplusplus
extern "C" {
# endif

/*****************************************************************************
 * Exception handling
 *****************************************************************************/
/** \defgroup libvlc_exception libvlc_exception
 * \ingroup libvlc_core
 * LibVLC Exceptions handling
 * @{
 */

/**
 * Initialize an exception structure. This can be called several times to
 * reuse an exception structure.
 *
 * \param p_exception the exception to initialize
 */
VLC_PUBLIC_API void libvlc_exception_init( libvlc_exception_t *p_exception );

/**
 * Has an exception been raised?
 *
 * \param p_exception the exception to query
 * \return 0 if the exception was raised, 1 otherwise
 */
VLC_PUBLIC_API int
libvlc_exception_raised( const libvlc_exception_t *p_exception );

/**
 * Raise an exception using a user-provided message.
 *
 * \param p_exception the exception to raise
 * \param psz_format the exception message format string
 * \param ... the format string arguments
 */
VLC_PUBLIC_API void
libvlc_exception_raise( libvlc_exception_t *p_exception,
                        const char *psz_format, ... );

/**
 * Clear an exception object so it can be reused.
 * The exception object must have be initialized.
 *
 * \param p_exception the exception to clear
 */
VLC_PUBLIC_API void libvlc_exception_clear( libvlc_exception_t * );

/**
 * Get an exception's message.
 *
 * \param p_exception the exception to query
 * \return the exception message or NULL if not applicable (exception not
 *         raised, for example)
 */
VLC_PUBLIC_API const char *
libvlc_exception_get_message( const libvlc_exception_t *p_exception );

/**@} */

/*****************************************************************************
 * Core handling
 *****************************************************************************/

/** \defgroup libvlc_core libvlc_core
 * \ingroup libvlc
 * LibVLC Core
 * @{
 */

/**
 * Create and initialize a libvlc instance.
 *
 * \param argc the number of arguments
 * \param argv command-line-type arguments. argv[0] must be the path of the
 *        calling program.
 * \param p_e an initialized exception pointer
 * \return the libvlc instance
 */
VLC_PUBLIC_API libvlc_instance_t *
libvlc_new( int , const char *const *, libvlc_exception_t *);

/**
 * Return a libvlc instance identifier for legacy APIs. Use of this
 * function is discouraged, you should convert your program to use the
 * new API.
 *
 * \param p_instance the instance
 * \return the instance identifier
 */
VLC_PUBLIC_API int libvlc_get_vlc_id( libvlc_instance_t *p_instance );

/**
 * Decrement the reference count of a libvlc instance, and destroy it
 * if it reaches zero.
 *
 * \param p_instance the instance to destroy
 */
VLC_PUBLIC_API void libvlc_release( libvlc_instance_t * );

/**
 * Increments the reference count of a libvlc instance.
 * The initial reference count is 1 after libvlc_new() returns.
 *
 * \param p_instance the instance to reference
 */
VLC_PUBLIC_API void libvlc_retain( libvlc_instance_t * );

/**
 * Try to start a user interface for the libvlc instance, and wait until the
 * user exits.
 *
 * \param p_instance the instance
 * \param name interface name, or NULL for default
 * \param p_exception an initialized exception pointer
 */
VLC_PUBLIC_API
void libvlc_add_intf( libvlc_instance_t *p_instance, const char *name,
                      libvlc_exception_t *p_exception );

/**
 * Waits until an interface causes the instance to exit.
 * You should start at least one interface first, using libvlc_add_intf().
 *
 * \param p_instance the instance
 */
VLC_PUBLIC_API
void libvlc_wait( libvlc_instance_t *p_instance );

/**
 * Retrieve libvlc version.
 *
 * Example: "0.9.0-git Grishenko"
 *
 * \return a string containing the libvlc version
 */
VLC_PUBLIC_API const char * libvlc_get_version(void);

/**
 * Retrieve libvlc compiler version.
 *
 * Example: "gcc version 4.2.3 (Ubuntu 4.2.3-2ubuntu6)"
 *
 * \return a string containing the libvlc compiler version
 */
VLC_PUBLIC_API const char * libvlc_get_compiler(void);

/**
 * Retrieve libvlc changeset.
 *
 * Example: "aa9bce0bc4"
 *
 * \return a string containing the libvlc changeset
 */
VLC_PUBLIC_API const char * libvlc_get_changeset(void);

/** @}*/

/*****************************************************************************
 * media
 *****************************************************************************/
/** \defgroup libvlc_media libvlc_media
 * \ingroup libvlc
 * LibVLC Media
 * @{
 */

/**
 * Create a media with the given MRL.
 *
 * \param p_instance the instance
 * \param psz_mrl the MRL to read
 * \param p_e an initialized exception pointer
 * \return the newly created media
 */
VLC_PUBLIC_API libvlc_media_t * libvlc_media_new(
                                   libvlc_instance_t *p_instance,
                                   const char * psz_mrl,
                                   libvlc_exception_t *p_e );

/**
 * Create a media as an empty node with the passed name.
 *
 * \param p_instance the instance
 * \param psz_name the name of the node
 * \param p_e an initialized exception pointer
 * \return the new empty media
 */
VLC_PUBLIC_API libvlc_media_t * libvlc_media_new_as_node(
                                   libvlc_instance_t *p_instance,
                                   const char * psz_name,
                                   libvlc_exception_t *p_e );

/**
 * Add an option to the media.
 *
 * This option will be used to determine how the media_player will
 * read the media. This allows to use VLC's advanced
 * reading/streaming options on a per-media basis.
 *
 * The options are detailed in vlc --long-help, for instance "--sout-all"
 *
 * \param p_instance the instance
 * \param ppsz_options the options (as a string)
 * \param p_e an initialized exception pointer
 */
VLC_PUBLIC_API void libvlc_media_add_option(
                                   libvlc_media_t * p_md,
                                   const char * ppsz_options,
                                   libvlc_exception_t * p_e );

/**
 * Retain a reference to a media descriptor object (libvlc_media_t). Use
 * libvlc_media_release() to decrement the reference count of a 
 * media descriptor object.
 *
 * \param p_meta_desc a media descriptor object.
 */
VLC_PUBLIC_API void libvlc_media_retain(
                                   libvlc_media_t *p_meta_desc );

/**
 * Decrement the reference count of a media descriptor object. If the
 * reference count is 0, then libvlc_media_release() will release the
 * media descriptor object. It will send out an libvlc_MediaFreed event
 * to all listeners. If the media descriptor object has been released it
 * should not be used again.
 *
 * \param p_meta_desc a media descriptor object.
 */
VLC_PUBLIC_API void libvlc_media_release(
                                   libvlc_media_t *p_meta_desc );


/**
 * Get the media resource locator (mrl) from a media descriptor object
 *
 * \param p_md a media descriptor object
 * \param p_e an initialized exception object
 * \return string with mrl of media descriptor object
 */
VLC_PUBLIC_API char * libvlc_media_get_mrl( libvlc_media_t * p_md,
                                                       libvlc_exception_t * p_e );

/**
 * Duplicate a media descriptor object.
 *
 * \param p_meta_desc a media descriptor object.
 */
VLC_PUBLIC_API libvlc_media_t * libvlc_media_duplicate( libvlc_media_t * );

/**
 * Read the meta of the media.
 *
 * \param p_meta_desc the media to read
 * \param e_meta_desc the meta to read
 * \param p_e an initialized exception pointer
 * \return the media's meta
 */
VLC_PUBLIC_API char * libvlc_media_get_meta(
                                   libvlc_media_t *p_meta_desc,
                                   libvlc_meta_t e_meta,
                                   libvlc_exception_t *p_e );
/**
 * Get current state of media descriptor object. Possible media states
 * are defined in libvlc_structures.c ( libvlc_NothingSpecial=0,
 * libvlc_Opening, libvlc_Buffering, libvlc_Playing, libvlc_Paused,
 * libvlc_Stopped, libvlc_Forward, libvlc_Backward, libvlc_Ended,
 * libvlc_Error).
 *
 * @see libvlc_state_t
 * \param p_meta_desc a media descriptor object
 * \param p_e an initialized exception object
 * \return state of media descriptor object
 */
VLC_PUBLIC_API libvlc_state_t libvlc_media_get_state(
                                   libvlc_media_t *p_meta_desc,
                                   libvlc_exception_t *p_e );

/**
 * Get subitems of media descriptor object. This will increment
 * the reference count of supplied media descriptor object. Use
 * libvlc_media_list_release() to decrement the reference counting.
 *
 * \param p_md media descriptor object
 * \param p_e initalized exception object
 * \return list of media descriptor subitems or NULL
 */
VLC_PUBLIC_API libvlc_media_list_t *
    libvlc_media_subitems( libvlc_media_t *p_md,
                                      libvlc_exception_t *p_e );
/**
 * Get event manager from media descriptor object.
 * NOTE: this function doesn't increment reference counting.
 *
 * \param p_md a media descriptor object
 * \param p_e an initialized exception object
 * \return event manager object
 */
VLC_PUBLIC_API libvlc_event_manager_t *
    libvlc_media_event_manager( libvlc_media_t * p_md,
                                           libvlc_exception_t * p_e );

/**
 * Get duration of media descriptor object item.
 *
 * \param p_md media descriptor object
 * \param p_e an initialized exception object
 * \return duration of media item
 */
VLC_PUBLIC_API libvlc_time_t
   libvlc_media_get_duration( libvlc_media_t * p_md,
                                         libvlc_exception_t * p_e );

/**
 * Get preparsed status for media descriptor object.
 *
 * \param p_md media descriptor object
 * \param p_e an initialized exception object
 * \return true if media object has been preparsed otherwise it returns false
 */
VLC_PUBLIC_API int
   libvlc_media_is_preparsed( libvlc_media_t * p_md,
                                         libvlc_exception_t * p_e );

/**
 * Sets media descriptor's user_data. user_data is specialized data 
 * accessed by the host application, VLC.framework uses it as a pointer to 
 * an native object that references a libvlc_media_t pointer
 *
 * \param p_md media descriptor object
 * \param p_new_user_data pointer to user data
 * \param p_e an initialized exception object
 */
VLC_PUBLIC_API void
    libvlc_media_set_user_data( libvlc_media_t * p_md,
                                           void * p_new_user_data,
                                           libvlc_exception_t * p_e);

/**
 * Get media descriptor's user_data. user_data is specialized data 
 * accessed by the host application, VLC.framework uses it as a pointer to 
 * an native object that references a libvlc_media_t pointer
 *
 * \param p_md media descriptor object
 * \param p_e an initialized exception object
 */
VLC_PUBLIC_API void *
    libvlc_media_get_user_data( libvlc_media_t * p_md,
                                           libvlc_exception_t * p_e);

/** @}*/

/*****************************************************************************
 * Media Player
 *****************************************************************************/
/** \defgroup libvlc_media_player libvlc_media_player
 * \ingroup libvlc
 * LibVLC Media Player, object that let you play a media
 * in a libvlc_drawable_t
 * @{
 */

/**
 * Create an empty Media Player object
 *
 * \param p_libvlc_instance the libvlc instance in which the Media Player
 *        should be created.
 * \param p_e an initialized exception pointer
 */