include/vlc_vlm.h

   1 /*****************************************************************************
   2  * vlc_vlm.h: VLM core structures
   3  *****************************************************************************
   4  * Copyright (C) 2000, 2001 VLC authors and VideoLAN
   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 it
  11  * under the terms of the GNU Lesser General Public License as published by
  12  * the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU Lesser General Public License
  21  * along with this program; if not, write to the Free Software Foundation,
  22  * 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     VLM_EVENT_MEDIA_INSTANCE_STATE,
 106 };
 107
 108 typedef struct
 109 {
 110     int            i_type;            /* a vlm_event_type_e value */
 111     int64_t        id;                /* Media ID */
 112     const char    *psz_name;          /* Media name */
 113     const char    *psz_instance_name; /* Instance name or NULL */
 114     input_state_e  input_state;       /* Input instance event type */
 115 } vlm_event_t;
 116
 117 /** VLM control query */
 118 enum vlm_query_e
 119 {
 120     /* --- Media control */
 121     /* Get all medias */
 122     VLM_GET_MEDIAS,                     /* arg1=vlm_media_t ***, int *pi_media      */
 123     /* Delete all medias */
 124     VLM_CLEAR_MEDIAS,                   /* no arg */
 125
 126     /* Add a new media */
 127     VLM_ADD_MEDIA,                      /* arg1=vlm_media_t* arg2=int64_t *p_id         res=can fail */
 128     /* Delete an existing media */
 129     VLM_DEL_MEDIA,                      /* arg1=int64_t id */
 130     /* Change properties of an existing media (all fields but id and b_vod) */
 131     VLM_CHANGE_MEDIA,                   /* arg1=vlm_media_t*                            res=can fail */
 132     /* Get 1 media by it's ID */
 133     VLM_GET_MEDIA,                      /* arg1=int64_t id arg2=vlm_media_t **  */
 134     /* Get media ID from its name */
 135     VLM_GET_MEDIA_ID,                   /* arg1=const char *psz_name arg2=int64_t*  */
 136
 137     /* Media instance control XXX VOD control are for internal use only */
 138     /* Get all media instances */
 139     VLM_GET_MEDIA_INSTANCES,            /* arg1=int64_t id arg2=vlm_media_instance_t *** arg3=int *pi_instance */
 140     /* Delete all media instances */
 141     VLM_CLEAR_MEDIA_INSTANCES,          /* arg1=int64_t id */
 142     /* Control broadcast instance */
 143     VLM_START_MEDIA_BROADCAST_INSTANCE, /* arg1=int64_t id, arg2=const char *psz_instance_name, int i_input_index  res=can fail */
 144     /* Control VOD instance */
 145     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 */
 146     /* Stop an instance */
 147     VLM_STOP_MEDIA_INSTANCE,            /* arg1=int64_t id, arg2=const char *psz_instance_name      res=can fail */
 148     /* Pause an instance */
 149     VLM_PAUSE_MEDIA_INSTANCE,           /* arg1=int64_t id, arg2=const char *psz_instance_name      res=can fail */
 150     /* Get instance position time (in microsecond) */
 151     VLM_GET_MEDIA_INSTANCE_TIME,        /* arg1=int64_t id, arg2=const char *psz_instance_name arg3=int64_t *   */
 152     /* Set instance position time (in microsecond) */
 153     VLM_SET_MEDIA_INSTANCE_TIME,        /* arg1=int64_t id, arg2=const char *psz_instance_name arg3=int64_t     */
 154     /* Get instance position ([0.0 .. 1.0]) */
 155     VLM_GET_MEDIA_INSTANCE_POSITION,    /* arg1=int64_t id, arg2=const char *psz_instance_name arg3=double *   */
 156     /* Set instance position ([0.0 .. 1.0]) */
 157     VLM_SET_MEDIA_INSTANCE_POSITION,    /* arg1=int64_t id, arg2=const char *psz_instance_name arg3=double     */
 158
 159     /* Schedule control */
 160     VLM_CLEAR_SCHEDULES,                /* no arg */
 161     /* TODO: missing schedule control */
 162
 163     /* */
 164 };
 165
 166
 167 /* VLM specific - structures and functions */
 168
 169 /* ok, here is the structure of a vlm_message:
 170    The parent node is ( name_of_the_command , NULL ), or
 171    ( name_of_the_command , message_error ) on error.
 172    If a node has children, it should not have a value (=NULL).*/
 173 struct vlm_message_t
 174 {
 175     char *psz_name;         /*< message name */
 176     char *psz_value;        /*< message value */
 177
 178     int           i_child;  /*< number of child messages */
 179     vlm_message_t **child;  /*< array of vlm_message_t */
 180 };
 181
 182
 183 #ifdef __cpluplus
 184 extern "C" {
 185 #endif
 186
 187 VLC_API vlm_t * vlm_New( vlc_object_t * );
 188 #define vlm_New( a ) vlm_New( VLC_OBJECT(a) )
 189 VLC_API void vlm_Delete( vlm_t * );
 190 VLC_API int vlm_ExecuteCommand( vlm_t *, const char *, vlm_message_t ** );
 191 VLC_API int vlm_Control( vlm_t *p_vlm, int i_query, ... );
 192
 193 VLC_API vlm_message_t * vlm_MessageSimpleNew( const char * );
 194 VLC_API vlm_message_t * vlm_MessageNew( const char *, const char *, ... ) VLC_FORMAT( 2, 3 );
 195 VLC_API vlm_message_t * vlm_MessageAdd( vlm_message_t *, vlm_message_t * );
 196 VLC_API void vlm_MessageDelete( vlm_message_t * );
 197
 198 /* media helpers */
 199
 200 /**
 201  * Initialize a vlm_media_t instance
 202  * \param p_media vlm_media_t instance to initialize
 203  */
 204 static inline void vlm_media_Init( vlm_media_t *p_media )
 205 {
 206     memset( p_media, 0, sizeof(vlm_media_t) );
 207     p_media->id = 0;    // invalid id
 208     p_media->psz_name = NULL;
 209     TAB_INIT( p_media->i_input, p_media->ppsz_input );
 210     TAB_INIT( p_media->i_option, p_media->ppsz_option );
 211     p_media->psz_output = NULL;
 212     p_media->b_vod = false;
 213
 214     p_media->vod.psz_mux = NULL;
 215     p_media->broadcast.b_loop = false;
 216 }
 217
 218 /**
 219  * Copy a vlm_media_t instance into another vlm_media_t instance
 220  * \param p_dst vlm_media_t instance to copy to
 221  * \param p_src vlm_media_t instance to copy from
 222  */
 223 static inline void
 224 #ifndef __cplusplus
 225 vlm_media_Copy( vlm_media_t *restrict p_dst, const vlm_media_t *restrict p_src )
 226 #else
 227 vlm_media_Copy( vlm_media_t *p_dst, const vlm_media_t *p_src )
 228 #endif
 229 {
 230     int i;
 231
 232     memset( p_dst, 0, sizeof(vlm_media_t) );
 233     p_dst->id = p_src->id;
 234     p_dst->b_enabled = p_src->b_enabled;
 235     if( p_src->psz_name )
 236         p_dst->psz_name = strdup( p_src->psz_name );
 237
 238     for( i = 0; i < p_src->i_input; i++ )
 239         TAB_APPEND_CAST( (char**), p_dst->i_input, p_dst->ppsz_input, strdup(p_src->ppsz_input[i]) );
 240     for( i = 0; i < p_src->i_option; i++ )
 241         TAB_APPEND_CAST( (char**), p_dst->i_option, p_dst->ppsz_option, strdup(p_src->ppsz_option[i]) );
 242
 243     if( p_src->psz_output )
 244         p_dst->psz_output = strdup( p_src->psz_output );
 245
 246     p_dst->b_vod = p_src->b_vod;
 247     if( p_src->b_vod )
 248     {
 249         if( p_src->vod.psz_mux )
 250             p_dst->vod.psz_mux = strdup( p_src->vod.psz_mux );
 251     }
 252     else
 253     {
 254         p_dst->broadcast.b_loop = p_src->broadcast.b_loop;
 255     }
 256 }
 257
 258 /**
 259  * Cleanup and release memory associated with this vlm_media_t instance.
 260  * You still need to release p_media itself with vlm_media_Delete().
 261  * \param p_media vlm_media_t to cleanup
 262  */
 263 static inline void vlm_media_Clean( vlm_media_t *p_media )
 264 {
 265     int i;
 266     free( p_media->psz_name );
 267
 268     for( i = 0; i < p_media->i_input; i++ )
 269         free( p_media->ppsz_input[i]);
 270     TAB_CLEAN(p_media->i_input, p_media->ppsz_input );
 271
 272     for( i = 0; i < p_media->i_option; i++ )
 273         free( p_media->ppsz_option[i]);
 274     TAB_CLEAN(p_media->i_option, p_media->ppsz_option );
 275
 276     free( p_media->psz_output );
 277     if( p_media->b_vod )
 278         free( p_media->vod.psz_mux );
 279 }
 280
 281 /**
 282  * Allocate a new vlm_media_t instance
 283  * \return vlm_media_t instance
 284  */
 285 static inline vlm_media_t *vlm_media_New(void)
 286 {
 287     vlm_media_t *p_media = (vlm_media_t *)malloc( sizeof(vlm_media_t) );
 288     if( p_media )
 289         vlm_media_Init( p_media );
 290     return p_media;
 291 }
 292
 293 /**
 294  * Delete a vlm_media_t instance
 295  * \param p_media vlm_media_t instance to delete
 296  */
 297 static inline void vlm_media_Delete( vlm_media_t *p_media )
 298 {
 299     vlm_media_Clean( p_media );
 300     free( p_media );
 301 }
 302
 303 /**
 304  * Copy a vlm_media_t instance
 305  * \param p_src vlm_media_t instance to copy
 306  * \return vlm_media_t duplicate of p_src
 307  */
 308 static inline vlm_media_t *vlm_media_Duplicate( vlm_media_t *p_src )
 309 {
 310     vlm_media_t *p_dst = vlm_media_New();
 311     if( p_dst )
 312         vlm_media_Copy( p_dst, p_src );
 313     return p_dst;
 314 }
 315
 316 /* media instance helpers */
 317 /**
 318  * Initialize vlm_media_instance_t
 319  * \param p_instance vlm_media_instance_t to initialize
 320  */
 321 static inline void vlm_media_instance_Init( vlm_media_instance_t *p_instance )
 322 {
 323     memset( p_instance, 0, sizeof(vlm_media_instance_t) );
 324     p_instance->psz_name = NULL;
 325     p_instance->i_time = 0;
 326     p_instance->i_length = 0;
 327     p_instance->d_position = 0.0;
 328     p_instance->b_paused = false;
 329     p_instance->i_rate = INPUT_RATE_DEFAULT;
 330 }
 331
 332 /**
 333  * Cleanup vlm_media_instance_t
 334  * \param p_instance vlm_media_instance_t to cleanup
 335  */
 336 static inline void vlm_media_instance_Clean( vlm_media_instance_t *p_instance )
 337 {
 338     free( p_instance->psz_name );
 339 }
 340
 341 /**
 342  * Allocate a new vlm_media_instance_t
 343  * \return a new vlm_media_instance_t
 344  */
 345 static inline vlm_media_instance_t *vlm_media_instance_New(void)
 346 {
 347     vlm_media_instance_t *p_instance = (vlm_media_instance_t *) malloc( sizeof(vlm_media_instance_t) );
 348     if( p_instance )
 349         vlm_media_instance_Init( p_instance );
 350     return p_instance;
 351 }
 352
 353 /**
 354  * Delete a vlm_media_instance_t
 355  * \param p_instance vlm_media_instance_t to delete
 356  */
 357 static inline void vlm_media_instance_Delete( vlm_media_instance_t *p_instance )
 358 {
 359     vlm_media_instance_Clean( p_instance );
 360     free( p_instance );
 361 }
 362
 363 #ifdef __cpluplus
 364 }
 365 #endif
 366
 367 /**@}*/
 368
 369 #endif