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vlc/include/vlc_vlm.h

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/*****************************************************************************
* vlc_vlm.h: VLM core structures
*****************************************************************************
* Copyright (C) 2000, 2001 VLC authors and VideoLAN
*
* Authors: Simon Latapie <garf@videolan.org>
* Laurent Aimar <fenrir@videolan.org>
*
* 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 VLC_VLM_H
#define VLC_VLM_H 1
#include <vlc_input.h>
#include <vlc_arrays.h>
/**
* \defgroup server VLM
* \ingroup interface
* VLC stream manager
*
* VLM is the server core in vlc that allows streaming of multiple media streams
* at the same time. It provides broadcast, schedule and video on demand features
* for streaming using several streaming and network protocols.
* @{
* \file
* VLC stream manager interface
*/
/** VLM media */
typedef struct
{
int64_t id; /*< numeric id for vlm_media_t item */
bool b_enabled; /*< vlm_media_t is enabled */
char *psz_name; /*< descriptive name of vlm_media_t item */
int i_input; /*< number of input options */
char **ppsz_input; /*< array of input options */
int i_option; /*< number of output options */
char **ppsz_option; /*< array of output options */
char *psz_output; /*< */
struct
{
bool b_loop; /*< this vlc_media_t broadcast item should loop */
} broadcast; /*< Broadcast specific information */
} vlm_media_t;
/** VLM media instance */
typedef struct
{
char *psz_name; /*< vlm media instance descriptive name */
int64_t i_time; /*< vlm media instance vlm media current time */
int64_t i_length; /*< vlm media instance vlm media item length */
double d_position; /*< vlm media instance position in stream */
bool b_paused; /*< vlm media instance is paused */
float f_rate; // normal is 1.0f
} vlm_media_instance_t;
#if 0
typedef struct
{
} vlm_schedule_t
#endif
/** VLM events
* You can catch vlm event by adding a callback on the variable "intf-event"
* of the VLM object.
* This variable is an address that will hold a vlm_event_t* value.
*/
enum vlm_event_type_e
{
/* */
VLM_EVENT_MEDIA_ADDED = 0x100,
VLM_EVENT_MEDIA_REMOVED,
VLM_EVENT_MEDIA_CHANGED,
/* */
VLM_EVENT_MEDIA_INSTANCE_STARTED = 0x200,
VLM_EVENT_MEDIA_INSTANCE_STOPPED,
VLM_EVENT_MEDIA_INSTANCE_STATE,
};
typedef enum vlm_state_e
{
VLM_INIT_S = 0,
VLM_OPENING_S,
VLM_PLAYING_S,
VLM_PAUSE_S,
VLM_END_S,
VLM_ERROR_S,
} vlm_state_e;
typedef struct
{
int i_type; /* a vlm_event_type_e value */
int64_t id; /* Media ID */
const char *psz_name; /* Media name */
const char *psz_instance_name; /* Instance name or NULL */
vlm_state_e input_state; /* Input instance event type */
} vlm_event_t;
/** VLM control query */
enum vlm_query_e
{
/* --- Media control */
/* Get all medias */
VLM_GET_MEDIAS, /* arg1=vlm_media_t ***, int *pi_media */
/* Delete all medias */
VLM_CLEAR_MEDIAS, /* no arg */
/* Add a new media */
VLM_ADD_MEDIA, /* arg1=vlm_media_t* arg2=int64_t *p_id res=can fail */
/* Delete an existing media */
VLM_DEL_MEDIA, /* arg1=int64_t id */
/* Change properties of an existing media (all fields but id) */
VLM_CHANGE_MEDIA, /* arg1=vlm_media_t* res=can fail */
/* Get 1 media by it's ID */
VLM_GET_MEDIA, /* arg1=int64_t id arg2=vlm_media_t ** */
/* Get media ID from its name */
VLM_GET_MEDIA_ID, /* arg1=const char *psz_name arg2=int64_t* */
/* Media instance control */
/* Get all media instances */
VLM_GET_MEDIA_INSTANCES, /* arg1=int64_t id arg2=vlm_media_instance_t *** arg3=int *pi_instance */
/* Delete all media instances */
VLM_CLEAR_MEDIA_INSTANCES, /* arg1=int64_t id */
/* Control broadcast instance */
VLM_START_MEDIA_BROADCAST_INSTANCE, /* arg1=int64_t id, arg2=const char *psz_instance_name, int i_input_index res=can fail */
/* Stop an instance */
VLM_STOP_MEDIA_INSTANCE, /* arg1=int64_t id, arg2=const char *psz_instance_name res=can fail */
/* Pause an instance */
VLM_PAUSE_MEDIA_INSTANCE, /* arg1=int64_t id, arg2=const char *psz_instance_name res=can fail */
/* Get instance position time (in microsecond) */
VLM_GET_MEDIA_INSTANCE_TIME, /* arg1=int64_t id, arg2=const char *psz_instance_name arg3=int64_t * */
/* Set instance position time (in microsecond) */
VLM_SET_MEDIA_INSTANCE_TIME, /* arg1=int64_t id, arg2=const char *psz_instance_name arg3=int64_t */
/* Get instance position ([0.0 .. 1.0]) */
VLM_GET_MEDIA_INSTANCE_POSITION, /* arg1=int64_t id, arg2=const char *psz_instance_name arg3=double * */
/* Set instance position ([0.0 .. 1.0]) */
VLM_SET_MEDIA_INSTANCE_POSITION, /* arg1=int64_t id, arg2=const char *psz_instance_name arg3=double */
/* Schedule control */
VLM_CLEAR_SCHEDULES, /* no arg */
/* TODO: missing schedule control */
/* */
};
/* VLM specific - structures and functions */
/* ok, here is the structure of a vlm_message:
The parent node is ( name_of_the_command , NULL ), or
( name_of_the_command , message_error ) on error.
If a node has children, it should not have a value (=NULL).*/
struct vlm_message_t
{
char *psz_name; /*< message name */
char *psz_value; /*< message value */
int i_child; /*< number of child messages */
vlm_message_t **child; /*< array of vlm_message_t */
};
#ifdef __cplusplus
extern "C" {
#endif
VLC_API vlm_t * vlm_New( libvlc_int_t *, const char *path );
VLC_API void vlm_Delete( vlm_t * );
VLC_API int vlm_ExecuteCommand( vlm_t *, const char *, vlm_message_t ** );
VLC_API int vlm_Control( vlm_t *p_vlm, int i_query, ... );
VLC_API vlm_message_t * vlm_MessageSimpleNew( const char * );
VLC_API vlm_message_t * vlm_MessageNew( const char *, const char *, ... ) VLC_FORMAT( 2, 3 );
VLC_API vlm_message_t * vlm_MessageAdd( vlm_message_t *, vlm_message_t * );
VLC_API void vlm_MessageDelete( vlm_message_t * );
/* media helpers */
/**
* Initialize a vlm_media_t instance
* \param p_media vlm_media_t instance to initialize
*/
static inline void vlm_media_Init( vlm_media_t *p_media )
{
memset( p_media, 0, sizeof(vlm_media_t) );
p_media->id = 0; // invalid id
p_media->psz_name = NULL;
TAB_INIT( p_media->i_input, p_media->ppsz_input );
TAB_INIT( p_media->i_option, p_media->ppsz_option );
p_media->psz_output = NULL;
p_media->broadcast.b_loop = false;
}
/**
* Copy a vlm_media_t instance into another vlm_media_t instance
* \param p_dst vlm_media_t instance to copy to
* \param p_src vlm_media_t instance to copy from
*/
static inline void
#ifndef __cplusplus
vlm_media_Copy( vlm_media_t *restrict p_dst, const vlm_media_t *restrict p_src )
#else
vlm_media_Copy( vlm_media_t *p_dst, const vlm_media_t *p_src )
#endif
{
int i;
memset( p_dst, 0, sizeof(vlm_media_t) );
p_dst->id = p_src->id;
p_dst->b_enabled = p_src->b_enabled;
if( p_src->psz_name )
p_dst->psz_name = strdup( p_src->psz_name );
for( i = 0; i < p_src->i_input; i++ )
TAB_APPEND_CAST( (char**), p_dst->i_input, p_dst->ppsz_input, strdup(p_src->ppsz_input[i]) );
for( i = 0; i < p_src->i_option; i++ )
TAB_APPEND_CAST( (char**), p_dst->i_option, p_dst->ppsz_option, strdup(p_src->ppsz_option[i]) );
if( p_src->psz_output )
p_dst->psz_output = strdup( p_src->psz_output );
p_dst->broadcast.b_loop = p_src->broadcast.b_loop;
}
/**
* Cleanup and release memory associated with this vlm_media_t instance.
* You still need to release p_media itself with vlm_media_Delete().
* \param p_media vlm_media_t to cleanup
*/
static inline void vlm_media_Clean( vlm_media_t *p_media )
{
int i;
free( p_media->psz_name );
for( i = 0; i < p_media->i_input; i++ )
free( p_media->ppsz_input[i]);
TAB_CLEAN(p_media->i_input, p_media->ppsz_input );
for( i = 0; i < p_media->i_option; i++ )
free( p_media->ppsz_option[i]);
TAB_CLEAN(p_media->i_option, p_media->ppsz_option );
free( p_media->psz_output );
}
/**
* Allocate a new vlm_media_t instance
* \return vlm_media_t instance
*/
static inline vlm_media_t *vlm_media_New(void)
{
vlm_media_t *p_media = (vlm_media_t *)malloc( sizeof(vlm_media_t) );
if( p_media )
vlm_media_Init( p_media );
return p_media;
}
/**
* Delete a vlm_media_t instance
* \param p_media vlm_media_t instance to delete
*/
static inline void vlm_media_Delete( vlm_media_t *p_media )
{
vlm_media_Clean( p_media );
free( p_media );
}
/**
* Copy a vlm_media_t instance
* \param p_src vlm_media_t instance to copy
* \return vlm_media_t duplicate of p_src
*/
static inline vlm_media_t *vlm_media_Duplicate( vlm_media_t *p_src )
{
vlm_media_t *p_dst = vlm_media_New();
if( p_dst )
vlm_media_Copy( p_dst, p_src );
return p_dst;
}
/* media instance helpers */
/**
* Initialize vlm_media_instance_t
* \param p_instance vlm_media_instance_t to initialize
*/
static inline void vlm_media_instance_Init( vlm_media_instance_t *p_instance )
{
memset( p_instance, 0, sizeof(vlm_media_instance_t) );
p_instance->psz_name = NULL;
p_instance->i_time = 0;
p_instance->i_length = 0;
p_instance->d_position = 0.0;
p_instance->b_paused = false;
p_instance->f_rate = 1.0f;
}
/**
* Cleanup vlm_media_instance_t
* \param p_instance vlm_media_instance_t to cleanup
*/
static inline void vlm_media_instance_Clean( vlm_media_instance_t *p_instance )
{
free( p_instance->psz_name );
}
/**
* Allocate a new vlm_media_instance_t
* \return a new vlm_media_instance_t
*/
static inline vlm_media_instance_t *vlm_media_instance_New(void)
{
vlm_media_instance_t *p_instance = (vlm_media_instance_t *) malloc( sizeof(vlm_media_instance_t) );
if( p_instance )
vlm_media_instance_Init( p_instance );
return p_instance;
}
/**
* Delete a vlm_media_instance_t
* \param p_instance vlm_media_instance_t to delete
*/
static inline void vlm_media_instance_Delete( vlm_media_instance_t *p_instance )
{
vlm_media_instance_Clean( p_instance );
free( p_instance );
}
#ifdef __cplusplus
}
#endif
/**@}*/
#endif
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