include/vlc_vlm.h

   1 /*****************************************************************************
   2  * vlc_vlm.h: VLM core structures
   3  *****************************************************************************
   4  * Copyright (C) 2000, 2001 VLC authors and VideoLAN
   5  *
   6  * Authors: Simon Latapie <garf@videolan.org>
   7  *          Laurent Aimar <fenrir@videolan.org>
   8  *
   9  * This program is free software; you can redistribute it and/or modify it
  10  * under the terms of the GNU Lesser General Public License as published by
  11  * the Free Software Foundation; either version 2.1 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  17  * GNU Lesser General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU Lesser General Public License
  20  * along with this program; if not, write to the Free Software Foundation,
  21  * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  22  *****************************************************************************/
  23
  24 #ifndef VLC_VLM_H
  25 #define VLC_VLM_H 1
  26
  27 #include <vlc_input.h>
  28
  29 /**
  30  * \defgroup server VLM
  31  * \ingroup interface
  32  * VLC stream manager
  33  *
  34  * VLM is the server core in vlc that allows streaming of multiple media streams
  35  * at the same time. It provides broadcast, schedule and video on demand features
  36  * for streaming using several streaming and network protocols.
  37  * @{
  38  * \file
  39  * VLC stream manager interface
  40  */
  41
  42 /** VLM media */
  43 typedef struct
  44 {
  45     int64_t     id;     /*< numeric id for vlm_media_t item */
  46     bool  b_enabled;    /*< vlm_media_t is enabled */
  47
  48     char *psz_name;     /*< descriptive name of vlm_media_t item */
  49
  50     int  i_input;       /*< number of input options */
  51     char **ppsz_input;  /*< array of input options */
  52
  53     int  i_option;      /*< number of output options */
  54     char **ppsz_option; /*< array of output options */
  55
  56     char *psz_output;   /*< */
  57
  58     bool b_vod;         /*< vlm_media_t is of type VOD */
  59     struct
  60     {
  61         bool b_loop;    /*< this vlc_media_t broadcast item should loop */
  62     } broadcast;        /*< Broadcast specific information */
  63     struct
  64     {
  65         char *psz_mux;  /*< name of muxer to use */
  66     } vod;              /*< VOD specific information */
  67
  68 } vlm_media_t;
  69
  70 /** VLM media instance */
  71 typedef struct
  72 {
  73     char *psz_name;         /*< vlm media instance descriptive name */
  74
  75     int64_t     i_time;     /*< vlm media instance vlm media current time */
  76     int64_t     i_length;   /*< vlm media instance vlm media item length */
  77     double      d_position; /*< vlm media instance position in stream */
  78     bool        b_paused;   /*< vlm media instance is paused */
  79     float       f_rate;     // normal is 1.0f
  80 } vlm_media_instance_t;
  81
  82 #if 0
  83 typedef struct
  84 {
  85
  86 } vlm_schedule_t
  87 #endif
  88
  89 /** VLM events
  90  * You can catch vlm event by adding a callback on the variable "intf-event"
  91  * of the VLM object.
  92  * This variable is an address that will hold a vlm_event_t* value.
  93  */
  94 enum vlm_event_type_e
  95 {
  96     /* */
  97     VLM_EVENT_MEDIA_ADDED   = 0x100,
  98     VLM_EVENT_MEDIA_REMOVED,
  99     VLM_EVENT_MEDIA_CHANGED,
 100
 101     /* */
 102     VLM_EVENT_MEDIA_INSTANCE_STARTED    = 0x200,
 103     VLM_EVENT_MEDIA_INSTANCE_STOPPED,
 104     VLM_EVENT_MEDIA_INSTANCE_STATE,
 105 };
 106
 107 typedef struct
 108 {
 109     int            i_type;            /* a vlm_event_type_e value */
 110     int64_t        id;                /* Media ID */
 111     const char    *psz_name;          /* Media name */
 112     const char    *psz_instance_name; /* Instance name or NULL */
 113     input_state_e  input_state;       /* Input instance event type */
 114 } vlm_event_t;
 115
 116 /** VLM control query */
 117 enum vlm_query_e
 118 {
 119     /* --- Media control */
 120     /* Get all medias */
 121     VLM_GET_MEDIAS,                     /* arg1=vlm_media_t ***, int *pi_media      */
 122     /* Delete all medias */
 123     VLM_CLEAR_MEDIAS,                   /* no arg */
 124
 125     /* Add a new media */
 126     VLM_ADD_MEDIA,                      /* arg1=vlm_media_t* arg2=int64_t *p_id         res=can fail */
 127     /* Delete an existing media */
 128     VLM_DEL_MEDIA,                      /* arg1=int64_t id */
 129     /* Change properties of an existing media (all fields but id and b_vod) */
 130     VLM_CHANGE_MEDIA,                   /* arg1=vlm_media_t*                            res=can fail */
 131     /* Get 1 media by it's ID */
 132     VLM_GET_MEDIA,                      /* arg1=int64_t id arg2=vlm_media_t **  */
 133     /* Get media ID from its name */
 134     VLM_GET_MEDIA_ID,                   /* arg1=const char *psz_name arg2=int64_t*  */
 135
 136     /* Media instance control XXX VOD control are for internal use only */
 137     /* Get all media instances */
 138     VLM_GET_MEDIA_INSTANCES,            /* arg1=int64_t id arg2=vlm_media_instance_t *** arg3=int *pi_instance */
 139     /* Delete all media instances */
 140     VLM_CLEAR_MEDIA_INSTANCES,          /* arg1=int64_t id */
 141     /* Control broadcast instance */
 142     VLM_START_MEDIA_BROADCAST_INSTANCE, /* arg1=int64_t id, arg2=const char *psz_instance_name, int i_input_index  res=can fail */
 143     /* Control VOD instance */
 144     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 */
 145     /* Stop an instance */
 146     VLM_STOP_MEDIA_INSTANCE,            /* arg1=int64_t id, arg2=const char *psz_instance_name      res=can fail */
 147     /* Pause an instance */
 148     VLM_PAUSE_MEDIA_INSTANCE,           /* arg1=int64_t id, arg2=const char *psz_instance_name      res=can fail */
 149     /* Get instance position time (in microsecond) */
 150     VLM_GET_MEDIA_INSTANCE_TIME,        /* arg1=int64_t id, arg2=const char *psz_instance_name arg3=int64_t *   */
 151     /* Set instance position time (in microsecond) */
 152     VLM_SET_MEDIA_INSTANCE_TIME,        /* arg1=int64_t id, arg2=const char *psz_instance_name arg3=int64_t     */
 153     /* Get instance position ([0.0 .. 1.0]) */
 154     VLM_GET_MEDIA_INSTANCE_POSITION,    /* arg1=int64_t id, arg2=const char *psz_instance_name arg3=double *   */
 155     /* Set instance position ([0.0 .. 1.0]) */
 156     VLM_SET_MEDIA_INSTANCE_POSITION,    /* arg1=int64_t id, arg2=const char *psz_instance_name arg3=double     */
 157
 158     /* Schedule control */
 159     VLM_CLEAR_SCHEDULES,                /* no arg */
 160     /* TODO: missing schedule control */
 161
 162     /* */
 163 };
 164
 165
 166 /* VLM specific - structures and functions */
 167
 168 /* ok, here is the structure of a vlm_message:
 169    The parent node is ( name_of_the_command , NULL ), or
 170    ( name_of_the_command , message_error ) on error.
 171    If a node has children, it should not have a value (=NULL).*/
 172 struct vlm_message_t
 173 {
 174     char *psz_name;         /*< message name */
 175     char *psz_value;        /*< message value */
 176
 177     int           i_child;  /*< number of child messages */
 178     vlm_message_t **child;  /*< array of vlm_message_t */
 179 };
 180
 181
 182 #ifdef __cplusplus
 183 extern "C" {
 184 #endif
 185
 186 VLC_API vlm_t * vlm_New( libvlc_int_t *, const char *path );
 187 VLC_API void vlm_Delete( vlm_t * );
 188 VLC_API int vlm_ExecuteCommand( vlm_t *, const char *, vlm_message_t ** );
 189 VLC_API int vlm_Control( vlm_t *p_vlm, int i_query, ... );
 190
 191 VLC_API vlm_message_t * vlm_MessageSimpleNew( const char * );
 192 VLC_API vlm_message_t * vlm_MessageNew( const char *, const char *, ... ) VLC_FORMAT( 2, 3 );
 193 VLC_API vlm_message_t * vlm_MessageAdd( vlm_message_t *, vlm_message_t * );
 194 VLC_API void vlm_MessageDelete( vlm_message_t * );
 195
 196 /* media helpers */
 197
 198 /**
 199  * Initialize a vlm_media_t instance
 200  * \param p_media vlm_media_t instance to initialize
 201  */
 202 static inline void vlm_media_Init( vlm_media_t *p_media )
 203 {
 204     memset( p_media, 0, sizeof(vlm_media_t) );
 205     p_media->id = 0;    // invalid id
 206     p_media->psz_name = NULL;
 207     TAB_INIT( p_media->i_input, p_media->ppsz_input );
 208     TAB_INIT( p_media->i_option, p_media->ppsz_option );
 209     p_media->psz_output = NULL;
 210     p_media->b_vod = false;
 211
 212     p_media->vod.psz_mux = NULL;
 213     p_media->broadcast.b_loop = false;
 214 }
 215
 216 /**
 217  * Copy a vlm_media_t instance into another vlm_media_t instance
 218  * \param p_dst vlm_media_t instance to copy to
 219  * \param p_src vlm_media_t instance to copy from
 220  */
 221 static inline void
 222 #ifndef __cplusplus
 223 vlm_media_Copy( vlm_media_t *restrict p_dst, const vlm_media_t *restrict p_src )
 224 #else
 225 vlm_media_Copy( vlm_media_t *p_dst, const vlm_media_t *p_src )
 226 #endif
 227 {
 228     int i;
 229
 230     memset( p_dst, 0, sizeof(vlm_media_t) );
 231     p_dst->id = p_src->id;
 232     p_dst->b_enabled = p_src->b_enabled;
 233     if( p_src->psz_name )
 234         p_dst->psz_name = strdup( p_src->psz_name );
 235
 236     for( i = 0; i < p_src->i_input; i++ )
 237         TAB_APPEND_CAST( (char**), p_dst->i_input, p_dst->ppsz_input, strdup(p_src->ppsz_input[i]) );
 238     for( i = 0; i < p_src->i_option; i++ )
 239         TAB_APPEND_CAST( (char**), p_dst->i_option, p_dst->ppsz_option, strdup(p_src->ppsz_option[i]) );
 240
 241     if( p_src->psz_output )
 242         p_dst->psz_output = strdup( p_src->psz_output );
 243
 244     p_dst->b_vod = p_src->b_vod;
 245     if( p_src->b_vod )
 246     {
 247         if( p_src->vod.psz_mux )
 248             p_dst->vod.psz_mux = strdup( p_src->vod.psz_mux );
 249     }
 250     else
 251     {
 252         p_dst->broadcast.b_loop = p_src->broadcast.b_loop;
 253     }
 254 }
 255
 256 /**
 257  * Cleanup and release memory associated with this vlm_media_t instance.
 258  * You still need to release p_media itself with vlm_media_Delete().
 259  * \param p_media vlm_media_t to cleanup
 260  */
 261 static inline void vlm_media_Clean( vlm_media_t *p_media )
 262 {
 263     int i;
 264     free( p_media->psz_name );
 265
 266     for( i = 0; i < p_media->i_input; i++ )
 267         free( p_media->ppsz_input[i]);
 268     TAB_CLEAN(p_media->i_input, p_media->ppsz_input );
 269
 270     for( i = 0; i < p_media->i_option; i++ )
 271         free( p_media->ppsz_option[i]);
 272     TAB_CLEAN(p_media->i_option, p_media->ppsz_option );
 273
 274     free( p_media->psz_output );
 275     if( p_media->b_vod )
 276         free( p_media->vod.psz_mux );
 277 }
 278
 279 /**
 280  * Allocate a new vlm_media_t instance
 281  * \return vlm_media_t instance
 282  */
 283 static inline vlm_media_t *vlm_media_New(void)
 284 {
 285     vlm_media_t *p_media = (vlm_media_t *)malloc( sizeof(vlm_media_t) );
 286     if( p_media )
 287         vlm_media_Init( p_media );
 288     return p_media;
 289 }
 290
 291 /**
 292  * Delete a vlm_media_t instance
 293  * \param p_media vlm_media_t instance to delete
 294  */
 295 static inline void vlm_media_Delete( vlm_media_t *p_media )
 296 {
 297     vlm_media_Clean( p_media );
 298     free( p_media );
 299 }
 300
 301 /**
 302  * Copy a vlm_media_t instance
 303  * \param p_src vlm_media_t instance to copy
 304  * \return vlm_media_t duplicate of p_src
 305  */
 306 static inline vlm_media_t *vlm_media_Duplicate( vlm_media_t *p_src )
 307 {
 308     vlm_media_t *p_dst = vlm_media_New();
 309     if( p_dst )
 310         vlm_media_Copy( p_dst, p_src );
 311     return p_dst;
 312 }
 313
 314 /* media instance helpers */
 315 /**
 316  * Initialize vlm_media_instance_t
 317  * \param p_instance vlm_media_instance_t to initialize
 318  */
 319 static inline void vlm_media_instance_Init( vlm_media_instance_t *p_instance )
 320 {
 321     memset( p_instance, 0, sizeof(vlm_media_instance_t) );
 322     p_instance->psz_name = NULL;
 323     p_instance->i_time = 0;
 324     p_instance->i_length = 0;
 325     p_instance->d_position = 0.0;
 326     p_instance->b_paused = false;
 327     p_instance->f_rate = 1.0f;
 328 }
 329
 330 /**
 331  * Cleanup vlm_media_instance_t
 332  * \param p_instance vlm_media_instance_t to cleanup
 333  */
 334 static inline void vlm_media_instance_Clean( vlm_media_instance_t *p_instance )
 335 {
 336     free( p_instance->psz_name );
 337 }
 338
 339 /**
 340  * Allocate a new vlm_media_instance_t
 341  * \return a new vlm_media_instance_t
 342  */
 343 static inline vlm_media_instance_t *vlm_media_instance_New(void)
 344 {
 345     vlm_media_instance_t *p_instance = (vlm_media_instance_t *) malloc( sizeof(vlm_media_instance_t) );
 346     if( p_instance )
 347         vlm_media_instance_Init( p_instance );
 348     return p_instance;
 349 }
 350
 351 /**
 352  * Delete a vlm_media_instance_t
 353  * \param p_instance vlm_media_instance_t to delete
 354  */
 355 static inline void vlm_media_instance_Delete( vlm_media_instance_t *p_instance )
 356 {
 357     vlm_media_instance_Clean( p_instance );
 358     free( p_instance );
 359 }
 360
 361 #ifdef __cplusplus
 362 }
 363 #endif
 364
 365 /**@}*/
 366
 367 #endif