vlc_vlm.h
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上传日期:2020-07-06
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midi
开发平台:
Unix_Linux
- /*****************************************************************************
- * vlc_vlm.h: VLM core structures
- *****************************************************************************
- * Copyright (C) 2000, 2001 the VideoLAN team
- * $Id: 0f16f4d6aa3d386ba98a7f59bdfb0c7383884df1 $
- *
- * 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 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.
- *****************************************************************************/
- #ifndef VLC_VLM_H
- #define VLC_VLM_H 1
- /**
- * file
- * This file defines VLM core functions and structures in vlc
- */
- #include <vlc_input.h>
- /**
- * defgroup server VLM
- * 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.
- * @{
- */
- /** 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; /*< */
- bool b_vod; /*< vlm_media_t is of type VOD */
- struct
- {
- bool b_loop; /*< this vlc_media_t broadcast item should loop */
- } broadcast; /*< Broadcast specific information */
- struct
- {
- char *psz_mux; /*< name of muxer to use */
- } vod; /*< VOD 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 */
- int i_rate; // normal is INPUT_RATE_DEFAULT
- } 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,
- };
- typedef struct
- {
- int i_type; /* a vlm_event_type_e value */
- int64_t id; /* Media ID */
- const char *psz_name; /* Media name */
- } 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 and b_vod) */
- 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 XXX VOD control are for internal use only */
- /* 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 */
- /* Control VOD instance */
- VLM_START_MEDIA_VOD_INSTANCE, /* arg1=int64_t id, arg2=const char *psz_instance_name, int i_input_index char *psz_vod_output 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 __cpluplus
- extern "C" {
- #endif
- #define vlm_New( a ) __vlm_New( VLC_OBJECT(a) )
- VLC_EXPORT( vlm_t *, __vlm_New, ( vlc_object_t * ) );
- VLC_EXPORT( void, vlm_Delete, ( vlm_t * ) );
- VLC_EXPORT( int, vlm_ExecuteCommand, ( vlm_t *, const char *, vlm_message_t ** ) );
- VLC_EXPORT( int, vlm_Control, ( vlm_t *p_vlm, int i_query, ... ) );
- VLC_EXPORT( vlm_message_t *, vlm_MessageSimpleNew, ( const char * ) );
- VLC_EXPORT( vlm_message_t *, vlm_MessageNew, ( const char *, const char *, ... ) LIBVLC_FORMAT( 2, 3 ) );
- VLC_EXPORT( vlm_message_t *, vlm_MessageAdd, ( vlm_message_t *, vlm_message_t * ) );
- VLC_EXPORT( 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->b_vod = false;
- p_media->vod.psz_mux = 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 vlm_media_Copy( vlm_media_t *p_dst, vlm_media_t *p_src )
- {
- 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_CPP( 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_CPP( 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->b_vod = p_src->b_vod;
- if( p_src->b_vod )
- {
- if( p_src->vod.psz_mux )
- p_dst->vod.psz_mux = strdup( p_src->vod.psz_mux );
- }
- else
- {
- 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 );
- if( p_media->b_vod )
- free( p_media->vod.psz_mux );
- }
- /**
- * 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->i_rate = INPUT_RATE_DEFAULT;
- }
- /**
- * 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 __cpluplus
- }
- #endif
- /**@}*/
- #endif