git.sesse.net Git - vlc/blob - modules/services_discovery/hal.c

   1 /*****************************************************************************
   2  * hal.c :  HAL interface module
   3  *****************************************************************************
   4  * Copyright (C) 2004 the VideoLAN team
   5  * Copyright (C) 2006 Rafaël Carré
   6  * $Id$
   7  *
   8  * Authors: Clément Stenac <zorglub@videolan.org>
   9  *          Rafaël Carré <funman at videolanorg>
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License as published by
  13  * the Free Software Foundation; either version 2 of the License, or
  14  * (at your option) any later version.
  15  *
  16  * This program is distributed in the hope that it will be useful,
  17  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  19  * GNU General Public License for more details.
  20  *
  21  * You should have received a copy of the GNU General Public License
  22  * along with this program; if not, write to the Free Software
  23  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  24  *****************************************************************************/
  25
  26 #include <vlc/vlc.h>
  27 #include <vlc_playlist.h>
  28
  29 #include <vlc_network.h>
  30
  31 #include <errno.h>                                                 /* ENOMEM */
  32
  33 #ifdef HAVE_UNISTD_H
  34 #    include <unistd.h>
  35 #endif
  36 #ifdef HAVE_SYS_TIME_H
  37 #    include <sys/time.h>
  38 #endif
  39
  40 #include <hal/libhal.h>
  41
  42 #define MAX_LINE_LENGTH 256
  43
  44 /*****************************************************************************
  45  * Local prototypes
  46  *****************************************************************************/
  47 #ifdef HAVE_HAL_1
  48 /* store relation between item id and udi for ejection */
  49 struct udi_input_id_t
  50 {
  51     char    *psz_udi;
  52     int     i_id;
  53 };
  54 #endif
  55
  56 struct services_discovery_sys_t
  57 {
  58     LibHalContext           *p_ctx;
  59     playlist_item_t         *p_node_cat;
  60     playlist_item_t         *p_node_one;
  61 #ifdef HAVE_HAL_1
  62     DBusConnection          *p_connection;
  63     int                     i_devices_number;
  64     struct udi_input_id_t   **pp_devices;
  65 #endif
  66 };
  67 static void Run    ( services_discovery_t *p_intf );
  68
  69 static int  Open ( vlc_object_t * );
  70 static void Close( vlc_object_t * );
  71
  72 #ifdef HAVE_HAL_1
  73 /* HAL callbacks */
  74 void DeviceAdded( LibHalContext *p_ctx, const char *psz_udi );
  75 void DeviceRemoved( LibHalContext *p_ctx, const char *psz_udi );
  76 /* to retrieve p_sd in HAL callbacks */
  77 services_discovery_t        *p_sd_global;
  78 #endif
  79
  80 /*****************************************************************************
  81  * Module descriptor
  82  *****************************************************************************/
  83 vlc_module_begin();
  84     set_description( _("HAL devices detection") );
  85     set_category( CAT_PLAYLIST );
  86     set_subcategory( SUBCAT_PLAYLIST_SD );
  87
  88     set_capability( "services_discovery", 0 );
  89     set_callbacks( Open, Close );
  90
  91 vlc_module_end();
  92
  93
  94 /*****************************************************************************
  95  * Open: initialize and create stuff
  96  *****************************************************************************/
  97 static int Open( vlc_object_t *p_this )
  98 {
  99     services_discovery_t *p_sd = ( services_discovery_t* )p_this;
 100     services_discovery_sys_t *p_sys  = malloc(
 101                                     sizeof( services_discovery_sys_t ) );
 102
 103     playlist_t          *p_playlist;
 104
 105 #ifdef HAVE_HAL_1
 106     DBusError           dbus_error;
 107     DBusConnection      *p_connection;
 108
 109     p_sd_global = p_sd;
 110     p_sys->i_devices_number = 0;
 111     p_sys->pp_devices = NULL;
 112 #endif
 113
 114     p_sd->pf_run = Run;
 115     p_sd->p_sys  = p_sys;
 116
 117 #ifdef HAVE_HAL_1
 118     dbus_error_init( &dbus_error );
 119
 120     p_sys->p_ctx = libhal_ctx_new();
 121     if( !p_sys->p_ctx )
 122     {
 123         msg_Err( p_sd, "unable to create HAL context") ;
 124         free( p_sys );
 125         return VLC_EGENERIC;
 126     }
 127     p_connection = dbus_bus_get( DBUS_BUS_SYSTEM, &dbus_error );
 128     if( dbus_error_is_set( &dbus_error ) )
 129     {
 130         msg_Err( p_sd, "unable to connect to DBUS: %s", dbus_error.message );
 131         dbus_error_free( &dbus_error );
 132         free( p_sys );
 133         return VLC_EGENERIC;
 134     }
 135     libhal_ctx_set_dbus_connection( p_sys->p_ctx, p_connection );
 136     p_sys->p_connection = p_connection;
 137     if( !libhal_ctx_init( p_sys->p_ctx, &dbus_error ) )
 138 #else
 139     if( !(p_sys->p_ctx = hal_initialize( NULL, FALSE ) ) )
 140 #endif
 141     {
 142 #ifdef HAVE_HAL_1
 143         msg_Err( p_sd, "hal not available : %s", dbus_error.message );
 144         dbus_error_free( &dbus_error );
 145 #else
 146         msg_Err( p_sd, "hal not available" );
 147 #endif
 148         free( p_sys );
 149         return VLC_EGENERIC;
 150     }
 151
 152 #ifdef HAVE_HAL_1
 153         if( !libhal_ctx_set_device_added( p_sys->p_ctx, DeviceAdded ) ||
 154                 !libhal_ctx_set_device_removed( p_sys->p_ctx, DeviceRemoved ) )
 155         {
 156             msg_Err( p_sd, "unable to add callback" );
 157             dbus_error_free( &dbus_error );
 158             free( p_sys );
 159             return VLC_EGENERIC;
 160         }
 161 #endif
 162
 163     /* Create our playlist node */
 164     p_playlist = (playlist_t *)vlc_object_find( p_sd, VLC_OBJECT_PLAYLIST,
 165                                                 FIND_ANYWHERE );
 166     if( !p_playlist )
 167     {
 168         msg_Warn( p_sd, "unable to find playlist, cancelling HAL listening");
 169         return VLC_EGENERIC;
 170     }
 171
 172     playlist_NodesPairCreate( p_playlist, _("Devices"),
 173                               &p_sys->p_node_cat, &p_sys->p_node_one,
 174                               VLC_TRUE );
 175     vlc_object_release( p_playlist );
 176
 177     return VLC_SUCCESS;
 178 }
 179
 180 /*****************************************************************************
 181  * Close:
 182  *****************************************************************************/
 183 static void Close( vlc_object_t *p_this )
 184 {
 185     services_discovery_t *p_sd = ( services_discovery_t* )p_this;
 186     services_discovery_sys_t *p_sys  = p_sd->p_sys;
 187     playlist_t *p_playlist =  (playlist_t *) vlc_object_find( p_sd,
 188                                  VLC_OBJECT_PLAYLIST, FIND_ANYWHERE );
 189     if( p_playlist )
 190     {
 191         playlist_NodeDelete( p_playlist, p_sys->p_node_cat, VLC_TRUE,VLC_TRUE );
 192         playlist_NodeDelete( p_playlist, p_sys->p_node_one, VLC_TRUE,VLC_TRUE );
 193         vlc_object_release( p_playlist );
 194     }
 195     free( p_sys );
 196 #ifdef HAVE_HAL_1
 197     dbus_connection_unref( p_sys->p_connection );
 198
 199     struct udi_input_id_t *p_udi_entry;
 200
 201     while( p_sys->i_devices_number > 0 )
 202     {
 203         p_udi_entry = p_sys->pp_devices[0];
 204         if( p_udi_entry->psz_udi ) free( p_udi_entry->psz_udi );
 205         TAB_REMOVE( p_sys->i_devices_number, p_sys->pp_devices,
 206                 p_sys->pp_devices[0] );
 207         if( p_udi_entry ) free( p_udi_entry );
 208     }
 209     p_sys->pp_devices = NULL;
 210 #endif
 211 }
 212
 213 static void AddItem( services_discovery_t *p_sd, input_item_t * p_input
 214 #ifdef HAVE_HAL_1
 215                 ,char* psz_device
 216 #endif
 217                     )
 218 {
 219     playlist_item_t *p_item_cat, *p_item_one;
 220     services_discovery_sys_t *p_sys  = p_sd->p_sys;
 221     playlist_t *p_playlist = (playlist_t *)vlc_object_find( p_sd,
 222                                         VLC_OBJECT_PLAYLIST, FIND_ANYWHERE );
 223     if( !p_playlist )
 224     {
 225         msg_Err( p_sd, "playlist not found" );
 226         return;
 227     }
 228     p_item_cat = playlist_NodeAddInput( p_playlist,
 229             p_input,p_sd->p_sys->p_node_cat, PLAYLIST_APPEND, PLAYLIST_END,
 230             VLC_FALSE );
 231     p_item_cat->i_flags &= ~PLAYLIST_SKIP_FLAG;
 232     p_item_one = playlist_NodeAddInput( p_playlist,
 233             p_input,p_sd->p_sys->p_node_one, PLAYLIST_APPEND, PLAYLIST_END,
 234             VLC_FALSE );
 235     p_item_one->i_flags &= ~PLAYLIST_SKIP_FLAG;
 236
 237     vlc_object_release( p_playlist );
 238
 239 #ifdef HAVE_HAL_1
 240     struct udi_input_id_t *p_udi_entry;
 241     p_udi_entry = malloc( sizeof( struct udi_input_id_t ) );
 242     if( !p_udi_entry )
 243     {
 244         return;
 245     }
 246     p_udi_entry->i_id = p_item_cat->i_id;
 247     p_udi_entry->psz_udi = strdup( psz_device );
 248     TAB_APPEND( p_sys->i_devices_number, p_sys->pp_devices, p_udi_entry );
 249 #endif
 250 }
 251
 252 static void AddDvd( services_discovery_t *p_sd, char *psz_device )
 253 {
 254     char *psz_name;
 255     char *psz_uri;
 256     char *psz_blockdevice;
 257     input_item_t        *p_input;
 258 #ifdef HAVE_HAL_1
 259     psz_name = libhal_device_get_property_string( p_sd->p_sys->p_ctx,
 260                                         psz_device, "volume.label", NULL );
 261     psz_blockdevice = libhal_device_get_property_string( p_sd->p_sys->p_ctx,
 262                                         psz_device, "block.device", NULL );
 263 #else
 264     psz_name = hal_device_get_property_string( p_sd->p_sys->p_ctx,
 265                                                psz_device, "volume.label" );
 266     psz_blockdevice = hal_device_get_property_string( p_sd->p_sys->p_ctx,
 267                                                  psz_device, "block.device" );
 268 #endif
 269     asprintf( &psz_uri, "dvd://%s", psz_blockdevice );
 270     /* Create the playlist item here */
 271     p_input = input_ItemNew( p_sd, psz_uri, psz_name );
 272     free( psz_uri );
 273     if( !p_input )
 274     {
 275         return;
 276     }
 277 #ifdef HAVE_HAL_1
 278     AddItem( p_sd, p_input, psz_device );
 279 #else
 280     AddItem( p_sd, p_input );
 281 #endif
 282 }
 283
 284 #ifdef HAVE_HAL_1
 285 static void DelItem( services_discovery_t *p_sd, char* psz_udi )
 286 {
 287     services_discovery_sys_t    *p_sys  = p_sd->p_sys;
 288     int                         i,j;
 289     playlist_item_t             *p_pl_item;
 290
 291     playlist_t *p_playlist = (playlist_t *)vlc_object_find( p_sd,
 292                                         VLC_OBJECT_PLAYLIST, FIND_ANYWHERE );
 293     if( !p_playlist )
 294     {
 295         msg_Err( p_sd, "playlist not found" );
 296         return;
 297     }
 298
 299     for( i = 0; i < p_sys->i_devices_number; i++ )
 300     { /*  looks for a matching udi */
 301         if( strcmp( psz_udi, p_sys->pp_devices[i]->psz_udi ) == 0 )
 302         { /* delete the corresponding item */
 303             p_pl_item = playlist_ItemGetById( p_playlist,
 304                 p_sys->pp_devices[i]->i_id, VLC_FALSE );
 305             if( p_pl_item )
 306             {
 307                 j = 0;
 308                 while( p_pl_item->i_children > 0 )
 309                 { /* delete all childs */
 310                     playlist_DeleteFromInput( p_playlist,
 311                         p_pl_item->pp_children[j]->p_input->i_id, VLC_FALSE );
 312                 }
 313                 /* delete parent item */
 314
 315                 /* HACK: if i_children == 0 the item won't be deleted
 316                  * That means that it _had_ children but they were deleted */
 317                 if( p_pl_item->i_children == 0 )
 318                     p_pl_item->i_children = -1;
 319
 320                 playlist_DeleteFromInput( p_playlist,
 321                     p_pl_item->p_input->i_id, VLC_FALSE );
 322             }
 323
 324             if( p_sys->pp_devices[i]->psz_udi )
 325                 free( p_sys->pp_devices[i]->psz_udi );
 326             TAB_REMOVE( p_sys->i_devices_number, p_sys->pp_devices,
 327                     p_sys->pp_devices[i] );
 328         }
 329     }
 330
 331     vlc_object_release( p_playlist );
 332 }
 333 #endif
 334
 335 static void AddCdda( services_discovery_t *p_sd, char *psz_device )
 336 {
 337     char *psz_uri;
 338     char *psz_blockdevice;
 339     input_item_t     *p_input;
 340 #ifdef HAVE_HAL_1
 341     psz_blockdevice = libhal_device_get_property_string( p_sd->p_sys->p_ctx,
 342                                             psz_device, "block.device", NULL );
 343 #else
 344     psz_blockdevice = hal_device_get_property_string( p_sd->p_sys->p_ctx,
 345                                                  psz_device, "block.device" );
 346 #endif
 347     asprintf( &psz_uri, "cdda://%s", psz_blockdevice );
 348     /* Create the playlist item here */
 349     p_input = input_ItemNew( p_sd, psz_uri, "Audio CD" );
 350     free( psz_uri );
 351     if( !p_input )
 352         return;
 353 #ifdef HAVE_HAL_1
 354     AddItem( p_sd, p_input, psz_device );
 355 #else
 356     AddItem( p_sd, p_input );
 357 #endif
 358 }
 359
 360 static void ParseDevice( services_discovery_t *p_sd, char *psz_device )
 361 {
 362     char *psz_disc_type;
 363     services_discovery_sys_t    *p_sys  = p_sd->p_sys;
 364 #ifdef HAVE_HAL_1
 365     if( libhal_device_property_exists( p_sys->p_ctx, psz_device,
 366                                        "volume.disc.type", NULL ) )
 367     {
 368         psz_disc_type = libhal_device_get_property_string( p_sys->p_ctx,
 369                                                         psz_device,
 370                                                         "volume.disc.type",
 371                                                         NULL );
 372 #else
 373     if( hal_device_property_exists( p_sys->p_ctx, psz_device,
 374                                     "volume.disc.type" ) )
 375     {
 376         psz_disc_type = hal_device_get_property_string( p_sys->p_ctx,
 377                                                         psz_device,
 378                                                         "volume.disc.type" );
 379 #endif
 380         if( !strncmp( psz_disc_type, "dvd_r", 5 ) )
 381         {
 382 #ifdef HAVE_HAL_1
 383             /* hal 0.2.9.7 (HAVE_HAL) has not is_videodvd
 384              * but hal 0.5.0 (HAVE_HAL_1) has */
 385             if (libhal_device_get_property_bool( p_sys->p_ctx, psz_device,
 386                                          "volume.disc.is_videodvd", NULL ) )
 387 #endif
 388             AddDvd( p_sd, psz_device );
 389         }
 390         else if( !strncmp( psz_disc_type, "cd_r", 4 ) )
 391         {
 392 #ifdef HAVE_HAL_1
 393             if( libhal_device_get_property_bool( p_sys->p_ctx, psz_device,
 394                                          "volume.disc.has_audio" , NULL ) )
 395 #else
 396             if( hal_device_get_property_bool( p_sys->p_ctx, psz_device,
 397                                          "volume.disc.has_audio" ) )
 398 #endif
 399             {
 400                 AddCdda( p_sd, psz_device );
 401             }
 402         }
 403     }
 404 }
 405
 406 /*****************************************************************************
 407  * Run: main HAL thread
 408  *****************************************************************************/
 409 static void Run( services_discovery_t *p_sd )
 410 {
 411     int i, i_devices;
 412     char **devices;
 413     services_discovery_sys_t    *p_sys  = p_sd->p_sys;
 414
 415     /* parse existing devices first */
 416 #ifdef HAVE_HAL_1
 417     if( ( devices = libhal_get_all_devices( p_sys->p_ctx, &i_devices, NULL ) ) )
 418 #else
 419     if( ( devices = hal_get_all_devices( p_sys->p_ctx, &i_devices ) ) )
 420 #endif
 421     {
 422         for( i = 0; i < i_devices; i++ )
 423         {
 424             ParseDevice( p_sd, devices[ i ] );
 425 #ifdef HAVE_HAL_1
 426             libhal_free_string( devices[ i ] );
 427 #else
 428             hal_free_string( devices[ i ] );
 429 #endif
 430
 431         }
 432     }
 433 #ifdef HAVE_HAL_1
 434     while( !p_sd->b_die )
 435     {
 436     /* look for events on the bus, blocking 1 second */
 437     dbus_connection_read_write_dispatch( p_sys->p_connection, 1000 );
 438     /* HAL 0.5.8.1 can use libhal_ctx_get_dbus_connection(p_sys->p_ctx) */
 439     }
 440 #endif
 441
 442 }
 443
 444 #ifdef HAVE_HAL_1
 445 void DeviceAdded( LibHalContext *p_ctx, const char *psz_udi )
 446 {
 447         ParseDevice( p_sd_global, (char*) psz_udi );
 448 }
 449 void DeviceRemoved( LibHalContext *p_ctx, const char *psz_udi )
 450 {
 451         DelItem( p_sd_global, (char*) psz_udi );
 452 }
 453 #endif
 454