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 © 2006-2007 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     input_item_t    *p_item;
  53 };
  54 #endif
  55
  56 struct services_discovery_sys_t
  57 {
  58     LibHalContext           *p_ctx;
  59 #ifdef HAVE_HAL_1
  60     DBusConnection          *p_connection;
  61     int                     i_devices_number;
  62     struct udi_input_id_t   **pp_devices;
  63 #endif
  64 };
  65 static void Run    ( services_discovery_t *p_intf );
  66
  67 static int  Open ( vlc_object_t * );
  68 static void Close( vlc_object_t * );
  69
  70 #ifdef HAVE_HAL_1
  71 /* HAL callbacks */
  72 void DeviceAdded( LibHalContext *p_ctx, const char *psz_udi );
  73 void DeviceRemoved( LibHalContext *p_ctx, const char *psz_udi );
  74 /* to retrieve p_sd in HAL callbacks */
  75 services_discovery_t        *p_sd_global;
  76 #endif
  77
  78 /*****************************************************************************
  79  * Module descriptor
  80  *****************************************************************************/
  81 vlc_module_begin();
  82     set_description( _("HAL devices detection") );
  83     set_category( CAT_PLAYLIST );
  84     set_subcategory( SUBCAT_PLAYLIST_SD );
  85
  86     set_capability( "services_discovery", 0 );
  87     set_callbacks( Open, Close );
  88
  89 vlc_module_end();
  90
  91
  92 /*****************************************************************************
  93  * Open: initialize and create stuff
  94  *****************************************************************************/
  95 static int Open( vlc_object_t *p_this )
  96 {
  97     services_discovery_t *p_sd = ( services_discovery_t* )p_this;
  98     services_discovery_sys_t *p_sys  = malloc(
  99                                     sizeof( services_discovery_sys_t ) );
 100
 101 #ifdef HAVE_HAL_1
 102     DBusError           dbus_error;
 103     DBusConnection      *p_connection;
 104
 105     p_sd_global = p_sd;
 106     p_sys->i_devices_number = 0;
 107     p_sys->pp_devices = NULL;
 108 #endif
 109
 110     p_sd->pf_run = Run;
 111     p_sd->p_sys  = p_sys;
 112
 113 #ifdef HAVE_HAL_1
 114     dbus_error_init( &dbus_error );
 115
 116     p_sys->p_ctx = libhal_ctx_new();
 117     if( !p_sys->p_ctx )
 118     {
 119         msg_Err( p_sd, "unable to create HAL context") ;
 120         free( p_sys );
 121         return VLC_EGENERIC;
 122     }
 123     p_connection = dbus_bus_get( DBUS_BUS_SYSTEM, &dbus_error );
 124     if( dbus_error_is_set( &dbus_error ) )
 125     {
 126         msg_Err( p_sd, "unable to connect to DBUS: %s", dbus_error.message );
 127         dbus_error_free( &dbus_error );
 128         free( p_sys );
 129         return VLC_EGENERIC;
 130     }
 131     libhal_ctx_set_dbus_connection( p_sys->p_ctx, p_connection );
 132     p_sys->p_connection = p_connection;
 133     if( !libhal_ctx_init( p_sys->p_ctx, &dbus_error ) )
 134 #else
 135     if( !(p_sys->p_ctx = hal_initialize( NULL, FALSE ) ) )
 136 #endif
 137     {
 138 #ifdef HAVE_HAL_1
 139         msg_Err( p_sd, "hal not available : %s", dbus_error.message );
 140         dbus_error_free( &dbus_error );
 141 #else
 142         msg_Err( p_sd, "hal not available" );
 143 #endif
 144         free( p_sys );
 145         return VLC_EGENERIC;
 146     }
 147
 148 #ifdef HAVE_HAL_1
 149         if( !libhal_ctx_set_device_added( p_sys->p_ctx, DeviceAdded ) ||
 150                 !libhal_ctx_set_device_removed( p_sys->p_ctx, DeviceRemoved ) )
 151         {
 152             msg_Err( p_sd, "unable to add callback" );
 153             dbus_error_free( &dbus_error );
 154             free( p_sys );
 155             return VLC_EGENERIC;
 156         }
 157 #endif
 158
 159     services_discovery_SetLocalizedName( p_sd, _("Devices") );
 160
 161     return VLC_SUCCESS;
 162 }
 163
 164 /*****************************************************************************
 165  * Close:
 166  *****************************************************************************/
 167 static void Close( vlc_object_t *p_this )
 168 {
 169     services_discovery_t *p_sd = ( services_discovery_t* )p_this;
 170     services_discovery_sys_t *p_sys  = p_sd->p_sys;
 171 #ifdef HAVE_HAL_1
 172     dbus_connection_unref( p_sys->p_connection );
 173     struct udi_input_id_t *p_udi_entry;
 174
 175     while( p_sys->i_devices_number > 0 )
 176     {
 177         p_udi_entry = p_sys->pp_devices[0];
 178         if( p_udi_entry->psz_udi ) free( p_udi_entry->psz_udi );
 179         TAB_REMOVE( p_sys->i_devices_number, p_sys->pp_devices,
 180                 p_sys->pp_devices[0] );
 181         if( p_udi_entry ) free( p_udi_entry );
 182     }
 183     p_sys->pp_devices = NULL;
 184 #endif
 185     free( p_sys );
 186 }
 187
 188 static void AddItem( services_discovery_t *p_sd, input_item_t * p_input
 189 #ifdef HAVE_HAL_1
 190                 ,char* psz_device
 191 #endif
 192                     )
 193 {
 194     services_discovery_sys_t *p_sys  = p_sd->p_sys;
 195     services_discovery_AddItem( p_sd, p_input, NULL /* no category */ );
 196
 197 #ifdef HAVE_HAL_1
 198     struct udi_input_id_t *p_udi_entry;
 199     p_udi_entry = malloc( sizeof( struct udi_input_id_t ) );
 200     if( !p_udi_entry )
 201     {
 202         return;
 203     }
 204     p_udi_entry->p_item = p_input;
 205     p_udi_entry->psz_udi = strdup( psz_device );
 206     TAB_APPEND( p_sys->i_devices_number, p_sys->pp_devices, p_udi_entry );
 207 #endif
 208 }
 209
 210 static void AddDvd( services_discovery_t *p_sd, char *psz_device )
 211 {
 212     char *psz_name;
 213     char *psz_uri;
 214     char *psz_blockdevice;
 215     input_item_t        *p_input;
 216 #ifdef HAVE_HAL_1
 217     psz_name = libhal_device_get_property_string( p_sd->p_sys->p_ctx,
 218                                         psz_device, "volume.label", NULL );
 219     psz_blockdevice = libhal_device_get_property_string( p_sd->p_sys->p_ctx,
 220                                         psz_device, "block.device", NULL );
 221 #else
 222     psz_name = hal_device_get_property_string( p_sd->p_sys->p_ctx,
 223                                                psz_device, "volume.label" );
 224     psz_blockdevice = hal_device_get_property_string( p_sd->p_sys->p_ctx,
 225                                                  psz_device, "block.device" );
 226 #endif
 227     if( asprintf( &psz_uri, "dvd://%s", psz_blockdevice ) == -1 )
 228         return;
 229     /* Create the playlist item here */
 230     p_input = input_ItemNew( p_sd, psz_uri, psz_name );
 231     free( psz_uri );
 232     if( !p_input )
 233     {
 234         return;
 235     }
 236 #ifdef HAVE_HAL_1
 237     AddItem( p_sd, p_input, psz_device );
 238 #else
 239     AddItem( p_sd, p_input );
 240 #endif
 241 }
 242
 243 #ifdef HAVE_HAL_1
 244 static void DelItem( services_discovery_t *p_sd, char* psz_udi )
 245 {
 246     services_discovery_sys_t    *p_sys  = p_sd->p_sys;
 247     playlist_item_t             *p_pl_item;
 248
 249     playlist_t *p_playlist = pl_Yield( p_sd );
 250     if( !p_playlist )
 251     {
 252         msg_Err( p_sd, "playlist not found" );
 253         return;
 254     }
 255
 256     int i;
 257     for( i = 0; i < p_sys->i_devices_number; i++ )
 258     { /*  looks for a matching udi */
 259         if( strcmp( psz_udi, p_sys->pp_devices[i]->psz_udi ) == 0 )
 260         { /* delete the corresponding item */
 261             p_pl_item = playlist_ItemGetByInputId( p_playlist,
 262                 p_sys->pp_devices[i]->p_item->i_id, p_sd->p_cat );
 263             if( p_pl_item )
 264             {
 265                 while( p_pl_item->i_children > 0 )
 266                 { /* delete all childs */
 267                     playlist_DeleteFromInput( p_playlist,
 268                         p_pl_item->pp_children[0]->p_input->i_id, VLC_FALSE );
 269                 }
 270                 /* HACK: if i_children == 0 the item won't be deleted
 271                  * That means that it _had_ children but they were deleted */
 272                 if( p_pl_item->i_children == 0 )
 273                     p_pl_item->i_children = -1;
 274             }
 275             services_discovery_RemoveItem( p_sd, p_sys->pp_devices[i]->p_item );
 276
 277             if( p_sys->pp_devices[i]->psz_udi )
 278                 free( p_sys->pp_devices[i]->psz_udi );
 279             TAB_REMOVE( p_sys->i_devices_number, p_sys->pp_devices,
 280                     p_sys->pp_devices[i] );
 281         }
 282     }
 283
 284     pl_Release( p_playlist );
 285 }
 286 #endif
 287
 288 static void AddCdda( services_discovery_t *p_sd, char *psz_device )
 289 {
 290     char *psz_uri;
 291     char *psz_blockdevice;
 292     input_item_t     *p_input;
 293 #ifdef HAVE_HAL_1
 294     psz_blockdevice = libhal_device_get_property_string( p_sd->p_sys->p_ctx,
 295                                             psz_device, "block.device", NULL );
 296 #else
 297     psz_blockdevice = hal_device_get_property_string( p_sd->p_sys->p_ctx,
 298                                                  psz_device, "block.device" );
 299 #endif
 300     if( asprintf( &psz_uri, "cdda://%s", psz_blockdevice ) == -1 )
 301         return;
 302     /* Create the playlist item here */
 303     p_input = input_ItemNew( p_sd, psz_uri, "Audio CD" );
 304     free( psz_uri );
 305     if( !p_input )
 306         return;
 307 #ifdef HAVE_HAL_1
 308     AddItem( p_sd, p_input, psz_device );
 309 #else
 310     AddItem( p_sd, p_input );
 311 #endif
 312 }
 313
 314 static void ParseDevice( services_discovery_t *p_sd, char *psz_device )
 315 {
 316     char *psz_disc_type;
 317     services_discovery_sys_t    *p_sys  = p_sd->p_sys;
 318 #ifdef HAVE_HAL_1
 319     if( libhal_device_property_exists( p_sys->p_ctx, psz_device,
 320                                        "volume.disc.type", NULL ) )
 321     {
 322         psz_disc_type = libhal_device_get_property_string( p_sys->p_ctx,
 323                                                         psz_device,
 324                                                         "volume.disc.type",
 325                                                         NULL );
 326 #else
 327     if( hal_device_property_exists( p_sys->p_ctx, psz_device,
 328                                     "volume.disc.type" ) )
 329     {
 330         psz_disc_type = hal_device_get_property_string( p_sys->p_ctx,
 331                                                         psz_device,
 332                                                         "volume.disc.type" );
 333 #endif
 334         if( !strncmp( psz_disc_type, "dvd_r", 5 ) )
 335         {
 336 #ifdef HAVE_HAL_1
 337             /* hal 0.2.9.7 (HAVE_HAL) has not is_videodvd
 338              * but hal 0.5.0 (HAVE_HAL_1) has */
 339             if (libhal_device_get_property_bool( p_sys->p_ctx, psz_device,
 340                                          "volume.disc.is_videodvd", NULL ) )
 341 #endif
 342             AddDvd( p_sd, psz_device );
 343         }
 344         else if( !strncmp( psz_disc_type, "cd_r", 4 ) )
 345         {
 346 #ifdef HAVE_HAL_1
 347             if( libhal_device_get_property_bool( p_sys->p_ctx, psz_device,
 348                                          "volume.disc.has_audio" , NULL ) )
 349 #else
 350             if( hal_device_get_property_bool( p_sys->p_ctx, psz_device,
 351                                          "volume.disc.has_audio" ) )
 352 #endif
 353             {
 354                 AddCdda( p_sd, psz_device );
 355             }
 356         }
 357     }
 358 }
 359
 360 /*****************************************************************************
 361  * Run: main HAL thread
 362  *****************************************************************************/
 363 static void Run( services_discovery_t *p_sd )
 364 {
 365     int i, i_devices;
 366     char **devices;
 367     services_discovery_sys_t    *p_sys  = p_sd->p_sys;
 368
 369     /* parse existing devices first */
 370 #ifdef HAVE_HAL_1
 371     if( ( devices = libhal_get_all_devices( p_sys->p_ctx, &i_devices, NULL ) ) )
 372 #else
 373     if( ( devices = hal_get_all_devices( p_sys->p_ctx, &i_devices ) ) )
 374 #endif
 375     {
 376         for( i = 0; i < i_devices; i++ )
 377         {
 378             ParseDevice( p_sd, devices[ i ] );
 379 #ifdef HAVE_HAL_1
 380             libhal_free_string( devices[ i ] );
 381 #else
 382             hal_free_string( devices[ i ] );
 383 #endif
 384
 385         }
 386     }
 387 #ifdef HAVE_HAL_1
 388     while( !p_sd->b_die )
 389     {
 390     /* look for events on the bus, blocking 1 second */
 391     dbus_connection_read_write_dispatch( p_sys->p_connection, 1000 );
 392     /* HAL 0.5.8.1 can use libhal_ctx_get_dbus_connection(p_sys->p_ctx) */
 393     }
 394 #endif
 395
 396 }
 397
 398 #ifdef HAVE_HAL_1
 399 void DeviceAdded( LibHalContext *p_ctx, const char *psz_udi )
 400 {
 401         ParseDevice( p_sd_global, (char*) psz_udi );
 402 }
 403 void DeviceRemoved( LibHalContext *p_ctx, const char *psz_udi )
 404 {
 405         DelItem( p_sd_global, (char*) psz_udi );
 406 }
 407 #endif
 408