libvlc.h

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/*****************************************************************************
 * libvlc.h: Internal libvlc generic/misc declaration
 *****************************************************************************
 * Copyright (C) 1999, 2000, 2001, 2002 VLC authors and VideoLAN
 * Copyright © 2006-2007 Rémi Denis-Courmont
 * $Id$
 *
 * Authors: Vincent Seguin <seguin@via.ecp.fr>
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms of the GNU Lesser General Public License as published by
 * the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser 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.
 *****************************************************************************/
 
#ifndef LIBVLC_LIBVLC_H
# define LIBVLC_LIBVLC_H 1
 
#include <vlc_input_item.h>
 
extern const char psz_vlc_changeset[];
 
typedef struct variable_t variable_t;
 
/*
 * OS-specific initialization
 */
void system_Init      ( void );
void system_Configure ( libvlc_int_t *, int, const char *const [] );
#if defined(_WIN32) || defined(__OS2__)
void system_End(void);
#ifndef __OS2__
size_t EnumClockSource( vlc_object_t *, const char *, char ***, char *** );
#endif
#endif
void vlc_CPU_init(void);
void vlc_CPU_dump(vlc_object_t *);
 
/*
 * Threads subsystem
 */
 
/* This cannot be used as is from plugins yet: */
int vlc_clone_detach (vlc_thread_t *, void *(*)(void *), void *, int);
 
int vlc_set_priority( vlc_thread_t, int );
 
void vlc_threads_setup (libvlc_int_t *);
 
void vlc_trace (const char *fn, const char *file, unsigned line);
#define vlc_backtrace() vlc_trace(__func__, __FILE__, __LINE__)
 
#if (defined (LIBVLC_USE_PTHREAD) || defined(__ANDROID__)) && !defined (NDEBUG)
void vlc_assert_locked (vlc_mutex_t *);
#else
# define vlc_assert_locked( m ) (void)m
#endif
 
/*
 * Logging
 */
typedef struct vlc_logger_t vlc_logger_t;
 
int vlc_LogPreinit(libvlc_int_t *);
int vlc_LogInit(libvlc_int_t *);
void vlc_LogDeinit(libvlc_int_t *);
 
/*
 * LibVLC exit event handling
 */
typedef struct vlc_exit
{
    vlc_mutex_t lock;
    void (*handler) (void *);
    void *opaque;
} vlc_exit_t;
 
void vlc_ExitInit( vlc_exit_t * );
void vlc_ExitDestroy( vlc_exit_t * );
 
/*
 * LibVLC objects stuff
 */
 
/**
 * Creates a VLC object.
 *
 * Note that because the object name pointer must remain valid, potentially
 * even after the destruction of the object (through the message queues), this
 * function CANNOT be exported to plugins as is. In this case, the old
 * vlc_object_create() must be used instead.
 *
 * @param p_this an existing VLC object
 * @param i_size byte size of the object structure
 * @param psz_type object type name
 * @return the created object, or NULL.
 */
extern void *
vlc_custom_create (vlc_object_t *p_this, size_t i_size, const char *psz_type);
#define vlc_custom_create(o, s, n) \
        vlc_custom_create(VLC_OBJECT(o), s, n)
 
/**
 * Assign a name to an object for vlc_object_find_name().
 */
extern int vlc_object_set_name(vlc_object_t *, const char *);
#define vlc_object_set_name(o, n) vlc_object_set_name(VLC_OBJECT(o), n)
 
/* Types */
typedef void (*vlc_destructor_t) (struct vlc_object_t *);
void vlc_object_set_destructor (vlc_object_t *, vlc_destructor_t);
#define vlc_object_set_destructor(a,b) \
        vlc_object_set_destructor (VLC_OBJECT(a), b)
 
/**
 * Allocates an object resource.
 *
 * @param size storage size in bytes of the resource data
 * @param release callback to release the resource
 *
 * @return a pointer to the (uninitialized) storage space, or NULL on error
 */
void *vlc_objres_new(size_t size, void (*release)(void *));
 
/**
 * Pushes an object resource on the object resources stack.
 *
 * @param obj object to allocate the resource for
 * @param data resource base address (as returned by vlc_objres_new())
 */
void vlc_objres_push(vlc_object_t *obj, void *data);
 
/**
 * Releases all resources of an object.
 *
 * All resources added with vlc_objres_add() are released in reverse order.
 * The resource list is reset to empty.
 *
 * @param obj object whose resources to release
 */
void vlc_objres_clear(vlc_object_t *obj);
 
/**
 * Releases one object resource explicitly.
 *
 * If a resource associated with an object needs to be released explicitly
 * earlier than normal, call this function. This is relatively slow and should
 * be avoided.
 *
 * @param obj object whose resource to release
 * @param data private data for the comparison function
 * @param match comparison function to match the targeted resource
 */
void vlc_objres_remove(vlc_object_t *obj, void *data,
                       bool (*match)(void *, void *));
 
#define ZOOM_SECTION N_("Zoom")
#define ZOOM_QUARTER_KEY_TEXT N_("1:4 Quarter")
#define ZOOM_HALF_KEY_TEXT N_("1:2 Half")
#define ZOOM_ORIGINAL_KEY_TEXT N_("1:1 Original")
#define ZOOM_DOUBLE_KEY_TEXT N_("2:1 Double")
 
/**
 * Private LibVLC instance data.
 */
typedef struct vlc_dialog_provider vlc_dialog_provider;
typedef struct vlc_keystore vlc_keystore;
typedef struct vlc_actions_t vlc_actions_t;
 
typedef struct libvlc_priv_t
{
    libvlc_int_t       public_data;
 
    /* Logging */
    bool               b_stats;     ///< Whether to collect stats
 
    /* Singleton objects */
    vlc_logger_t      *logger;
    vlm_t             *p_vlm;  ///< the VLM singleton (or NULL)
    vlc_dialog_provider *p_dialog_provider; ///< dialog provider
    vlc_keystore      *p_memory_keystore; ///< memory keystore
    struct playlist_t *playlist; ///< Playlist for interfaces
    struct playlist_preparser_t *parser; ///< Input item meta data handler
    vlc_actions_t *actions; ///< Hotkeys handler
 
    /* Exit callback */
    vlc_exit_t       exit;
} libvlc_priv_t;
 
static inline libvlc_priv_t *libvlc_priv (libvlc_int_t *libvlc)
{
    return container_of(libvlc, libvlc_priv_t, public_data);
}
 
int intf_InsertItem(libvlc_int_t *, const char *mrl, unsigned optc,
                    const char * const *optv, unsigned flags);
void intf_DestroyAll( libvlc_int_t * );
 
#define libvlc_stats( o ) (libvlc_priv((VLC_OBJECT(o))->obj.libvlc)->b_stats)
 
int vlc_MetadataRequest(libvlc_int_t *libvlc, input_item_t *item,
                        input_item_meta_request_option_t i_options,
                        int timeout, void *id);
 
/*
 * Variables stuff
 */
void var_OptionParse (vlc_object_t *, const char *, bool trusted);
 
/*
 * Stats stuff
 */
enum
{
    STATS_COUNTER,
    STATS_DERIVATIVE,
};
 
typedef struct counter_sample_t
{
    uint64_t value;
    vlc_tick_t  date;
} counter_sample_t;
 
typedef struct counter_t
{
    int                 i_compute_type;
    int                 i_samples;
    counter_sample_t ** pp_samples;
 
    vlc_tick_t          last_update;
} counter_t;
 
enum
{
    STATS_INPUT_BITRATE,
    STATS_READ_BYTES,
    STATS_READ_PACKETS,
    STATS_DEMUX_READ,
    STATS_DEMUX_BITRATE,
    STATS_DEMUX_CORRUPTED,
    STATS_DEMUX_DISCONTINUITY,
    STATS_PLAYED_ABUFFERS,
    STATS_LOST_ABUFFERS,
    STATS_DECODED_AUDIO,
    STATS_DECODED_VIDEO,
    STATS_DECODED_SUB,
    STATS_CLIENT_CONNECTIONS,
    STATS_ACTIVE_CONNECTIONS,
    STATS_SOUT_SENT_PACKETS,
    STATS_SOUT_SENT_BYTES,
    STATS_SOUT_SEND_BITRATE,
    STATS_DISPLAYED_PICTURES,
    STATS_LOST_PICTURES,
};
 
counter_t * stats_CounterCreate (int);
void stats_Update (counter_t *, uint64_t, uint64_t *);
void stats_CounterClean (counter_t * );
 
void stats_ComputeInputStats(input_thread_t*, input_stats_t*);
void stats_ReinitInputStats(input_stats_t *);
 
#endif