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/intf.h>
  28
  29 #include <vlc/input.h>
  30
  31 #include "network.h"
  32
  33 #include <errno.h>                                                 /* ENOMEM */
  34
  35 #ifdef HAVE_UNISTD_H
  36 #    include <unistd.h>
  37 #endif
  38 #ifdef HAVE_SYS_TIME_H
  39 #    include <sys/time.h>
  40 #endif
  41
  42 #include <hal/libhal.h>
  43
  44 #define MAX_LINE_LENGTH 256
  45
  46 /*****************************************************************************
  47  * Local prototypes
  48  *****************************************************************************/
  49 #ifdef HAVE_HAL_1
  50 /* store relation between item id and udi for ejection */
  51 struct udi_input_id_t
  52 {
  53     char    *psz_udi;
  54     int     i_id;
  55 };
  56 #endif
  57
  58 struct services_discovery_sys_t
  59 {
  60     LibHalContext           *p_ctx;
  61     playlist_item_t         *p_node_cat;
  62     playlist_item_t         *p_node_one;
  63 #ifdef HAVE_HAL_1
  64     DBusConnection          *p_connection;
  65     int                     i_devices_number;
  66     struct udi_input_id_t   **pp_devices;
  67 #endif
  68 };
  69 static void Run    ( services_discovery_t *p_intf );
  70
  71 static int  Open ( vlc_object_t * );
  72 static void Close( vlc_object_t * );
  73
  74 #ifdef HAVE_HAL_1
  75 /* HAL callbacks */
  76 void DeviceAdded( LibHalContext *p_ctx, const char *psz_udi );
  77 void DeviceRemoved( LibHalContext *p_ctx, const char *psz_udi );
  78 /* to retrieve p_sd in HAL callbacks */
  79 services_discovery_t        *p_sd_global;
  80 #endif
  81
  82 /*****************************************************************************
  83  * Module descriptor
  84  *****************************************************************************/
  85 vlc_module_begin();
  86     set_description( _("HAL devices detection") );
  87     set_category( CAT_PLAYLIST );
  88     set_subcategory( SUBCAT_PLAYLIST_SD );
  89
  90     set_capability( "services_discovery", 0 );
  91     set_callbacks( Open, Close );
  92
  93 vlc_module_end();
  94
  95
  96 /*****************************************************************************
  97  * Open: initialize and create stuff
  98  *****************************************************************************/
  99 static int Open( vlc_object_t *p_this )
 100 {
 101     services_discovery_t *p_sd = ( services_discovery_t* )p_this;
 102     services_discovery_sys_t *p_sys  = malloc(
 103                                     sizeof( services_discovery_sys_t ) );
 104
 105     playlist_t          *p_playlist;
 106
 107 #ifdef HAVE_HAL_1
 108     DBusError           dbus_error;
 109     DBusConnection      *p_connection;
 110
 111     p_sd_global = p_sd;
 112     p_sys->i_devices_number = 0;
 113     p_sys->pp_devices = NULL;
 114 #endif
 115
 116     p_sd->pf_run = Run;
 117     p_sd->p_sys  = p_sys;
 118
 119 #ifdef HAVE_HAL_1
 120     dbus_error_init( &dbus_error );
 121
 122     p_sys->p_ctx = libhal_ctx_new();
 123     if( !p_sys->p_ctx )
 124     {
 125         msg_Err( p_sd, "unable to create HAL context") ;
 126         free( p_sys );
 127         return VLC_EGENERIC;
 128     }
 129     p_connection = dbus_bus_get( DBUS_BUS_SYSTEM, &dbus_error );
 130     if( dbus_error_is_set( &dbus_error ) )
 131     {
 132         msg_Err( p_sd, "unable to connect to DBUS: %s", dbus_error.message );
 133         dbus_error_free( &dbus_error );
 134         free( p_sys );
 135         return VLC_EGENERIC;
 136     }
 137     libhal_ctx_set_dbus_connection( p_sys->p_ctx, p_connection );
 138     p_sys->p_connection = p_connection;
 139     if( !libhal_ctx_init( p_sys->p_ctx, &dbus_error ) )
 140 #else
 141     if( !(p_sys->p_ctx = hal_initialize( NULL, FALSE ) ) )
 142 #endif
 143     {
 144 #ifdef HAVE_HAL_1
 145         msg_Err( p_sd, "hal not available : %s", dbus_error.message );
 146         dbus_error_free( &dbus_error );
 147 #else
 148         msg_Err( p_sd, "hal not available" );
 149 #endif
 150         free( p_sys );
 151         return VLC_EGENERIC;
 152     }
 153
 154 #ifdef HAVE_HAL_1
 155         if( !libhal_ctx_set_device_added( p_sys->p_ctx, DeviceAdded ) ||
 156                 !libhal_ctx_set_device_removed( p_sys->p_ctx, DeviceRemoved ) )
 157         {
 158             msg_Err( p_sd, "unable to add callback" );
 159             dbus_error_free( &dbus_error );
 160             free( p_sys );
 161             return VLC_EGENERIC;
 162         }
 163 #endif
 164
 165     /* Create our playlist node */
 166     p_playlist = (playlist_t *)vlc_object_find( p_sd, VLC_OBJECT_PLAYLIST,
 167                                                 FIND_ANYWHERE );
 168     if( !p_playlist )
 169     {
 170         msg_Warn( p_sd, "unable to find playlist, cancelling HAL listening");
 171         return VLC_EGENERIC;
 172     }
 173
 174     playlist_NodesPairCreate( p_playlist, _("Devices"),
 175                               &p_sys->p_node_cat, &p_sys->p_node_one,
 176                               VLC_TRUE );
 177     vlc_object_release( p_playlist );
 178
 179     return VLC_SUCCESS;
 180 }
 181
 182 /*****************************************************************************
 183  * Close:
 184  *****************************************************************************/
 185 static void Close( vlc_object_t *p_this )
 186 {
 187     services_discovery_t *p_sd = ( services_discovery_t* )p_this;
 188     services_discovery_sys_t *p_sys  = p_sd->p_sys;
 189     playlist_t *p_playlist =  (playlist_t *) vlc_object_find( p_sd,
 190                                  VLC_OBJECT_PLAYLIST, FIND_ANYWHERE );
 191     if( p_playlist )
 192     {
 193         playlist_NodeDelete( p_playlist, p_sys->p_node_cat, VLC_TRUE,VLC_TRUE );
 194         playlist_NodeDelete( p_playlist, p_sys->p_node_one, VLC_TRUE,VLC_TRUE );
 195         vlc_object_release( p_playlist );
 196     }
 197     free( p_sys );
 198 #ifdef HAVE_HAL_1
 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;
 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 = playlist_NodeAddInput( p_playlist, p_input,p_sd->p_sys->p_node_cat,
 229                                     PLAYLIST_APPEND, PLAYLIST_END );
 230     p_item->i_flags &= ~PLAYLIST_SKIP_FLAG;
 231     p_item = playlist_NodeAddInput( p_playlist, p_input,p_sd->p_sys->p_node_one,
 232                                     PLAYLIST_APPEND, PLAYLIST_END );
 233     p_item->i_flags &= ~PLAYLIST_SKIP_FLAG;
 234
 235     vlc_object_release( p_playlist );
 236
 237 #ifdef HAVE_HAL_1
 238     struct udi_input_id_t *p_udi_entry;
 239     p_udi_entry = malloc( sizeof( struct udi_input_id_t ) );
 240     if( !p_udi_entry )
 241     {
 242         return;
 243     }
 244     p_udi_entry->i_id = p_item->i_id;
 245     p_udi_entry->psz_udi = strdup( psz_device );
 246     TAB_APPEND( p_sys->i_devices_number, p_sys->pp_devices, p_udi_entry );
 247 #endif
 248 }
 249
 250 static void AddDvd( services_discovery_t *p_sd, char *psz_device )
 251 {
 252     char *psz_name;
 253     char *psz_uri;
 254     char *psz_blockdevice;
 255     input_item_t        *p_input;
 256 #ifdef HAVE_HAL_1
 257     psz_name = libhal_device_get_property_string( p_sd->p_sys->p_ctx,
 258                                         psz_device, "volume.label", NULL );
 259     psz_blockdevice = libhal_device_get_property_string( p_sd->p_sys->p_ctx,
 260                                         psz_device, "block.device", NULL );
 261 #else
 262     psz_name = hal_device_get_property_string( p_sd->p_sys->p_ctx,
 263                                                psz_device, "volume.label" );
 264     psz_blockdevice = hal_device_get_property_string( p_sd->p_sys->p_ctx,
 265                                                  psz_device, "block.device" );
 266 #endif
 267     asprintf( &psz_uri, "dvd://%s", psz_blockdevice );
 268     /* Create the playlist item here */
 269     p_input = input_ItemNew( p_sd, psz_uri, psz_name );
 270     free( psz_uri );
 271     if( !p_input )
 272     {
 273         return;
 274     }
 275 #ifdef HAVE_HAL_1
 276     AddItem( p_sd, p_input, psz_device );
 277 #else
 278     AddItem( p_sd, p_input );
 279 #endif
 280 }
 281
 282 #ifdef HAVE_HAL_1
 283 static void DelItem( services_discovery_t *p_sd, char* psz_udi )
 284 {
 285     services_discovery_sys_t    *p_sys  = p_sd->p_sys;
 286     int                         i;
 287
 288     playlist_t *p_playlist = (playlist_t *)vlc_object_find( p_sd,
 289                                         VLC_OBJECT_PLAYLIST, FIND_ANYWHERE );
 290     if( !p_playlist )
 291     {
 292         msg_Err( p_sd, "playlist not found" );
 293         return;
 294     }
 295
 296     for( i = 0; i < p_sys->i_devices_number; i++ )
 297     {
 298         if( strcmp( psz_udi, p_sys->pp_devices[i]->psz_udi ) == 0 )
 299         {
 300             msg_Err(p_sd, "HAL delete must be fixed");
 301 /*      playlist_DeleteFromItemId( p_playlist, p_sys->pp_devices[i]->i_id );*/
 302             TAB_REMOVE( p_sys->i_devices_number, p_sys->pp_devices,
 303                     p_sys->pp_devices[i] );
 304         }
 305     }
 306
 307     vlc_object_release( p_playlist );
 308 }
 309 #endif
 310
 311 static void AddCdda( services_discovery_t *p_sd, char *psz_device )
 312 {
 313     char *psz_uri;
 314     char *psz_blockdevice;
 315     input_item_t     *p_input;
 316 #ifdef HAVE_HAL_1
 317     psz_blockdevice = libhal_device_get_property_string( p_sd->p_sys->p_ctx,
 318                                             psz_device, "block.device", NULL );
 319 #else
 320     psz_blockdevice = hal_device_get_property_string( p_sd->p_sys->p_ctx,
 321                                                  psz_device, "block.device" );
 322 #endif
 323     asprintf( &psz_uri, "cdda://%s", psz_blockdevice );
 324     /* Create the playlist item here */
 325     p_input = input_ItemNew( p_sd, psz_uri, "Audio CD" );
 326     free( psz_uri );
 327     if( !p_input )
 328         return;
 329 #ifdef HAVE_HAL_1
 330     AddItem( p_sd, p_input, psz_device );
 331 #else
 332     AddItem( p_sd, p_input );
 333 #endif
 334 }
 335
 336 static void ParseDevice( services_discovery_t *p_sd, char *psz_device )
 337 {
 338     char *psz_disc_type;
 339     services_discovery_sys_t    *p_sys  = p_sd->p_sys;
 340 #ifdef HAVE_HAL_1
 341     if( libhal_device_property_exists( p_sys->p_ctx, psz_device,
 342                                        "volume.disc.type", NULL ) )
 343     {
 344         psz_disc_type = libhal_device_get_property_string( p_sys->p_ctx,
 345                                                         psz_device,
 346                                                         "volume.disc.type",
 347                                                         NULL );
 348 #else
 349     if( hal_device_property_exists( p_sys->p_ctx, psz_device,
 350                                     "volume.disc.type" ) )
 351     {
 352         psz_disc_type = hal_device_get_property_string( p_sys->p_ctx,
 353                                                         psz_device,
 354                                                         "volume.disc.type" );
 355 #endif
 356         if( !strcmp( psz_disc_type, "dvd_rom" ) )
 357         {
 358 #ifdef HAVE_HAL_1
 359             /* hal 0.2.9.7 (HAVE_HAL) has not is_videodvd
 360              * but hal 0.5.0 (HAVE_HAL_1) has */
 361             if (libhal_device_get_property_bool( p_sys->p_ctx, psz_device,
 362                                          "volume.disc.is_videodvd", NULL ) )
 363 #endif
 364             AddDvd( p_sd, psz_device );
 365         }
 366         else if( !strcmp( psz_disc_type, "cd_rom" ) )
 367         {
 368 #ifdef HAVE_HAL_1
 369             if( libhal_device_get_property_bool( p_sys->p_ctx, psz_device,
 370                                          "volume.disc.has_audio" , NULL ) )
 371 #else
 372             if( hal_device_get_property_bool( p_sys->p_ctx, psz_device,
 373                                          "volume.disc.has_audio" ) )
 374 #endif
 375             {
 376                 AddCdda( p_sd, psz_device );
 377             }
 378         }
 379     }
 380 }
 381
 382 /*****************************************************************************
 383  * Run: main HAL thread
 384  *****************************************************************************/
 385 static void Run( services_discovery_t *p_sd )
 386 {
 387     int i, i_devices;
 388     char **devices;
 389     services_discovery_sys_t    *p_sys  = p_sd->p_sys;
 390
 391     /* parse existing devices first */
 392 #ifdef HAVE_HAL_1
 393     if( ( devices = libhal_get_all_devices( p_sys->p_ctx, &i_devices, NULL ) ) )
 394 #else
 395     if( ( devices = hal_get_all_devices( p_sys->p_ctx, &i_devices ) ) )
 396 #endif
 397     {
 398         for( i = 0; i < i_devices; i++ )
 399         {
 400             ParseDevice( p_sd, devices[ i ] );
 401 #ifdef HAVE_HAL_1
 402             libhal_free_string( devices[ i ] );
 403 #else
 404             hal_free_string( devices[ i ] );
 405 #endif
 406
 407         }
 408     }
 409 #ifdef HAVE_HAL_1
 410     while( !p_sd->b_die )
 411     {
 412     /* look for events on the bus, blocking 1 second */
 413     dbus_connection_read_write_dispatch( p_sys->p_connection, 1000 );
 414     /* HAL 0.5.8.1 can use libhal_ctx_get_dbus_connection(p_sys->p_ctx) */
 415     }
 416 #endif
 417
 418 }
 419
 420 #ifdef HAVE_HAL_1
 421 void DeviceAdded( LibHalContext *p_ctx, const char *psz_udi )
 422 {
 423         ParseDevice( p_sd_global, (char*) psz_udi );
 424 }
 425 void DeviceRemoved( LibHalContext *p_ctx, const char *psz_udi )
 426 {
 427         DelItem( p_sd_global, (char*) psz_udi );
 428 }
 429 #endif
 430