include/vlc_vlm.h

   1 /*****************************************************************************
   2  * vlc_vlm.h: VLM core structures
   3  *****************************************************************************
   4  * Copyright (C) 2000, 2001 the VideoLAN team
   5  * $Id$
   6  *
   7  * Authors: Simon Latapie <garf@videolan.org>
   8  *          Laurent Aimar <fenrir@videolan.org>
   9  *
  10  * This program is free software; you can redistribute it and/or modify
  11  * it under the terms of the GNU General Public License as published by
  12  * the Free Software Foundation; either version 2 of the License, or
  13  * (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  23  *****************************************************************************/
  24
  25 #ifndef VLC_VLM_H
  26 #define VLC_VLM_H 1
  27
  28 /**
  29  * \file
  30  * This file defines VLM core functions and structures in vlc
  31  */
  32
  33 #include <vlc_input.h>
  34
  35 /**
  36  * \defgroup server VLM
  37  * VLM is the server core in vlc that allows streaming of multiple media streams
  38  * at the same time. It provides broadcast, schedule and video on demand features
  39  * for streaming using several streaming and network protocols.
  40  * @{
  41  */
  42
  43 /** VLM media */
  44 typedef struct
  45 {
  46     int64_t     id;     /*< numeric id for vlm_media_t item */
  47     bool  b_enabled;    /*< vlm_media_t is enabled */
  48
  49     char *psz_name;     /*< descriptive name of vlm_media_t item */
  50
  51     int  i_input;       /*< number of input options */
  52     char **ppsz_input;  /*< array of input options */
  53
  54     int  i_option;      /*< number of output options */
  55     char **ppsz_option; /*< array of output options */
  56
  57     char *psz_output;   /*< */
  58
  59     bool b_vod;         /*< vlm_media_t is of type VOD */
  60     struct
  61     {
  62         bool b_loop;    /*< this vlc_media_t broadcast item should loop */
  63     } broadcast;        /*< Broadcast specific information */
  64     struct
  65     {
  66         char *psz_mux;  /*< name of muxer to use */
  67     } vod;              /*< VOD specific information */
  68
  69 } vlm_media_t;
  70
  71 /** VLM media instance */
  72 typedef struct
  73 {
  74     char *psz_name;         /*< vlm media instance descriptive name */
  75
  76     int64_t     i_time;     /*< vlm media instance vlm media current time */
  77     int64_t     i_length;   /*< vlm media instance vlm media item length */
  78     double      d_position; /*< vlm media instance position in stream */
  79     bool        b_paused;   /*< vlm media instance is paused */
  80     int         i_rate;     // normal is INPUT_RATE_DEFAULT
  81 } vlm_media_instance_t;
  82
  83 #if 0
  84 typedef struct
  85 {
  86
  87 } vlm_schedule_t
  88 #endif
  89
  90 /** VLM events
  91  * You can catch vlm event by adding a callback on the variable "intf-event"
  92  * of the VLM object.
  93  * This variable is an address that will hold a vlm_event_t* value.
  94  */
  95 enum vlm_event_type_e
  96 {
  97     /* */
  98     VLM_EVENT_MEDIA_ADDED   = 0x100,
  99     VLM_EVENT_MEDIA_REMOVED,
 100     VLM_EVENT_MEDIA_CHANGED,
 101
 102     /* */
 103     VLM_EVENT_MEDIA_INSTANCE_STARTED    = 0x200,
 104     VLM_EVENT_MEDIA_INSTANCE_STOPPED,
 105 };
 106
 107 typedef struct
 108 {
 109     int     i_type;     /* a vlm_event_type_e value */
 110     int64_t id;         /* Media ID */
 111 } vlm_event_t;
 112
 113 /** VLM control query */
 114 enum vlm_query_e
 115 {
 116     /* --- Media control */
 117     /* Get all medias */
 118     VLM_GET_MEDIAS,                     /* arg1=vlm_media_t ***, int *pi_media      */
 119     /* Delete all medias */
 120     VLM_CLEAR_MEDIAS,                   /* no arg */
 121
 122     /* Add a new media */
 123     VLM_ADD_MEDIA,                      /* arg1=vlm_media_t* arg2=int64_t *p_id         res=can fail */
 124     /* Delete an existing media */
 125     VLM_DEL_MEDIA,                      /* arg1=int64_t id */
 126     /* Change properties of an existing media (all fields but id and b_vod) */
 127     VLM_CHANGE_MEDIA,                   /* arg1=vlm_media_t*                            res=can fail */
 128     /* Get 1 media by it's ID */
 129     VLM_GET_MEDIA,                      /* arg1=int64_t id arg2=vlm_media_t **  */
 130     /* Get media ID from its name */
 131     VLM_GET_MEDIA_ID,                   /* arg1=const char *psz_name arg2=int64_t*  */
 132
 133     /* Media instance control XXX VOD control are for internal use only */
 134     /* Get all media instances */
 135     VLM_GET_MEDIA_INSTANCES,            /* arg1=int64_t id arg2=vlm_media_instance_t *** arg3=int *pi_instance */
 136     /* Delete all media instances */
 137     VLM_CLEAR_MEDIA_INSTANCES,          /* arg1=int64_t id */
 138     /* Control broadcast instance */
 139     VLM_START_MEDIA_BROADCAST_INSTANCE, /* arg1=int64_t id, arg2=const char *psz_instance_name, int i_input_index  res=can fail */
 140     /* Control VOD instance */
 141     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 */
 142     /* Stop an instance */
 143     VLM_STOP_MEDIA_INSTANCE,            /* arg1=int64_t id, arg2=const char *psz_instance_name      res=can fail */
 144     /* Pause an instance */
 145     VLM_PAUSE_MEDIA_INSTANCE,           /* arg1=int64_t id, arg2=const char *psz_instance_name      res=can fail */
 146     /* Get instance position time (in microsecond) */
 147     VLM_GET_MEDIA_INSTANCE_TIME,        /* arg1=int64_t id, arg2=const char *psz_instance_name arg3=int64_t *   */
 148     /* Set instance position time (in microsecond) */
 149     VLM_SET_MEDIA_INSTANCE_TIME,        /* arg1=int64_t id, arg2=const char *psz_instance_name arg3=int64_t     */
 150     /* Get instance position ([0.0 .. 1.0]) */
 151     VLM_GET_MEDIA_INSTANCE_POSITION,    /* arg1=int64_t id, arg2=const char *psz_instance_name arg3=double *   */
 152     /* Set instance position ([0.0 .. 1.0]) */
 153     VLM_SET_MEDIA_INSTANCE_POSITION,    /* arg1=int64_t id, arg2=const char *psz_instance_name arg3=double     */
 154
 155     /* Schedule control */
 156     VLM_CLEAR_SCHEDULES,                /* no arg */
 157     /* TODO: missing schedule control */
 158
 159     /* */
 160 };
 161
 162
 163 /* VLM specific - structures and functions */
 164
 165 /* ok, here is the structure of a vlm_message:
 166    The parent node is ( name_of_the_command , NULL ), or
 167    ( name_of_the_command , message_error ) on error.
 168    If a node has children, it should not have a value (=NULL).*/
 169 struct vlm_message_t
 170 {
 171     char *psz_name;         /*< message name */
 172     char *psz_value;        /*< message value */
 173
 174     int           i_child;  /*< number of child messages */
 175     vlm_message_t **child;  /*< array of vlm_message_t */
 176 };
 177
 178
 179 #ifdef __cpluplus
 180 extern "C" {
 181 #endif
 182
 183 #define vlm_New( a ) __vlm_New( VLC_OBJECT(a) )
 184 VLC_EXPORT( vlm_t *, __vlm_New, ( vlc_object_t * ) );
 185 VLC_EXPORT( void,      vlm_Delete, ( vlm_t * ) );
 186 VLC_EXPORT( int,       vlm_ExecuteCommand, ( vlm_t *, const char *, vlm_message_t ** ) );
 187 VLC_EXPORT( int,       vlm_Control, ( vlm_t *p_vlm, int i_query, ... ) );
 188
 189 VLC_EXPORT( vlm_message_t *, vlm_MessageNew, ( const char *, const char *, ... ) LIBVLC_FORMAT( 2, 3 ) );
 190 VLC_EXPORT( vlm_message_t *, vlm_MessageAdd, ( vlm_message_t *, vlm_message_t * ) );
 191 VLC_EXPORT( void,            vlm_MessageDelete, ( vlm_message_t * ) );
 192
 193 /* media helpers */
 194
 195 /**
 196  * Initialize a vlm_media_t instance
 197  * \param p_media vlm_media_t instance to initialize
 198  */
 199 static inline void vlm_media_Init( vlm_media_t *p_media )
 200 {
 201     memset( p_media, 0, sizeof(vlm_media_t) );
 202     p_media->id = 0;    // invalid id
 203     p_media->psz_name = NULL;
 204     TAB_INIT( p_media->i_input, p_media->ppsz_input );
 205     TAB_INIT( p_media->i_option, p_media->ppsz_option );
 206     p_media->psz_output = NULL;
 207     p_media->b_vod = false;
 208
 209     p_media->vod.psz_mux = NULL;
 210     p_media->broadcast.b_loop = false;
 211 }
 212
 213 /**
 214  * Copy a vlm_media_t instance into another vlm_media_t instance
 215  * \param p_dst vlm_media_t instance to copy to
 216  * \param p_src vlm_media_t instance to copy from
 217  */
 218 static inline void vlm_media_Copy( vlm_media_t *p_dst, vlm_media_t *p_src )
 219 {
 220     int i;
 221
 222     memset( p_dst, 0, sizeof(vlm_media_t) );
 223     p_dst->id = p_src->id;
 224     p_dst->b_enabled = p_src->b_enabled;
 225     if( p_src->psz_name )
 226         p_dst->psz_name = strdup( p_src->psz_name );
 227
 228     for( i = 0; i < p_src->i_input; i++ )
 229         TAB_APPEND_CPP( char, p_dst->i_input, p_dst->ppsz_input, strdup(p_src->ppsz_input[i]) );
 230     for( i = 0; i < p_src->i_option; i++ )
 231         TAB_APPEND_CPP( char, p_dst->i_option, p_dst->ppsz_option, strdup(p_src->ppsz_option[i]) );
 232
 233     if( p_src->psz_output )
 234         p_dst->psz_output = strdup( p_src->psz_output );
 235
 236     p_dst->b_vod = p_src->b_vod;
 237     if( p_src->b_vod )
 238     {
 239         if( p_src->vod.psz_mux )
 240             p_dst->vod.psz_mux = strdup( p_src->vod.psz_mux );
 241     }
 242     else
 243     {
 244         p_dst->broadcast.b_loop = p_src->broadcast.b_loop;
 245     }
 246 }
 247
 248 /**
 249  * Cleanup and release memory associated with this vlm_media_t instance.
 250  * You still need to release p_media itself with vlm_media_Delete().
 251  * \param p_media vlm_media_t to cleanup
 252  */
 253 static inline void vlm_media_Clean( vlm_media_t *p_media )
 254 {
 255     int i;
 256     free( p_media->psz_name );
 257
 258     for( i = 0; i < p_media->i_input; i++ )
 259         free( p_media->ppsz_input[i]) ;
 260     TAB_CLEAN(p_media->i_input, p_media->ppsz_input );
 261
 262     for( i = 0; i < p_media->i_option; i++ )
 263         free( p_media->ppsz_option[i]) ;
 264     TAB_CLEAN(p_media->i_option, p_media->ppsz_option );
 265
 266     free( p_media->psz_output );
 267     if( p_media->b_vod )
 268         free( p_media->vod.psz_mux );
 269 }
 270
 271 /**
 272  * Allocate a new vlm_media_t instance
 273  * \return vlm_media_t instance
 274  */
 275 static inline vlm_media_t *vlm_media_New(void)
 276 {
 277     vlm_media_t *p_media = (vlm_media_t *)malloc( sizeof(vlm_media_t) );
 278     if( p_media )
 279         vlm_media_Init( p_media );
 280     return p_media;
 281 }
 282
 283 /**
 284  * Delete a vlm_media_t instance
 285  * \param p_media vlm_media_t instance to delete
 286  */
 287 static inline void vlm_media_Delete( vlm_media_t *p_media )
 288 {
 289     vlm_media_Clean( p_media );
 290     free( p_media );
 291 }
 292
 293 /**
 294  * Copy a vlm_media_t instance
 295  * \param p_src vlm_media_t instance to copy
 296  * \return vlm_media_t duplicate of p_src
 297  */
 298 static inline vlm_media_t *vlm_media_Duplicate( vlm_media_t *p_src )
 299 {
 300     vlm_media_t *p_dst = vlm_media_New();
 301     if( p_dst )
 302         vlm_media_Copy( p_dst, p_src );
 303     return p_dst;
 304 }
 305
 306 /* media instance helpers */
 307 /**
 308  * Initialize vlm_media_instance_t
 309  * \param p_instance vlm_media_instance_t to initialize
 310  */
 311 static inline void vlm_media_instance_Init( vlm_media_instance_t *p_instance )
 312 {
 313     memset( p_instance, 0, sizeof(vlm_media_instance_t) );
 314     p_instance->psz_name = NULL;
 315     p_instance->i_time = 0;
 316     p_instance->i_length = 0;
 317     p_instance->d_position = 0.0;
 318     p_instance->b_paused = false;
 319     p_instance->i_rate = INPUT_RATE_DEFAULT;
 320 }
 321
 322 /**
 323  * Cleanup vlm_media_instance_t
 324  * \param p_instance vlm_media_instance_t to cleanup
 325  */
 326 static inline void vlm_media_instance_Clean( vlm_media_instance_t *p_instance )
 327 {
 328     free( p_instance->psz_name );
 329 }
 330
 331 /**
 332  * Allocate a new vlm_media_instance_t
 333  * \return a new vlm_media_instance_t
 334  */
 335 static inline vlm_media_instance_t *vlm_media_instance_New(void)
 336 {
 337     vlm_media_instance_t *p_instance = (vlm_media_instance_t *) malloc( sizeof(vlm_media_instance_t) );
 338     if( p_instance )
 339         vlm_media_instance_Init( p_instance );
 340     return p_instance;
 341 }
 342
 343 /**
 344  * Delete a vlm_media_instance_t
 345  * \param p_instance vlm_media_instance_t to delete
 346  */
 347 static inline void vlm_media_instance_Delete( vlm_media_instance_t *p_instance )
 348 {
 349     vlm_media_instance_Clean( p_instance );
 350     free( p_instance );
 351 }
 352
 353 #ifdef __cpluplus
 354 }
 355 #endif
 356
 357 /**@}*/
 358
 359 #endif