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 #if defined( HAVE_HAL_1 ) && defined( HAVE_DBUS_2 )
  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 #if defined( HAVE_HAL_1 ) && defined( HAVE_DBUS_2 )
  64     int                     i_devices_number;
  65     struct udi_input_id_t   **pp_devices;
  66 #endif
  67 };
  68 static void Run    ( services_discovery_t *p_intf );
  69
  70 static int  Open ( vlc_object_t * );
  71 static void Close( vlc_object_t * );
  72
  73 #if defined( HAVE_HAL_1 ) && defined( HAVE_DBUS_2 )
  74 /* HAL callbacks */
  75 void DeviceAdded( LibHalContext *p_ctx, const char *psz_udi );
  76 void DeviceRemoved( LibHalContext *p_ctx, const char *psz_udi );
  77 /* to retrieve p_sd in HAL callbacks */
  78 services_discovery_t        *p_sd_global;
  79 #endif
  80
  81 /*****************************************************************************
  82  * Module descriptor
  83  *****************************************************************************/
  84 vlc_module_begin();
  85     set_description( _("HAL devices detection") );
  86     set_category( CAT_PLAYLIST );
  87     set_subcategory( SUBCAT_PLAYLIST_SD );
  88
  89     set_capability( "services_discovery", 0 );
  90     set_callbacks( Open, Close );
  91
  92 vlc_module_end();
  93
  94
  95 /*****************************************************************************
  96  * Open: initialize and create stuff
  97  *****************************************************************************/
  98 static int Open( vlc_object_t *p_this )
  99 {
 100     services_discovery_t *p_sd = ( services_discovery_t* )p_this;
 101     services_discovery_sys_t *p_sys  = malloc(
 102                                     sizeof( services_discovery_sys_t ) );
 103
 104     playlist_t          *p_playlist;
 105
 106 #if defined( HAVE_HAL_1 ) && defined( HAVE_DBUS_2 )
 107     DBusError           dbus_error;
 108     DBusConnection      *p_connection;
 109
 110     p_sd_global = p_sd;
 111     p_sys->i_devices_number = 0;
 112     p_sys->pp_devices = NULL;
 113 #endif
 114
 115     p_sd->pf_run = Run;
 116     p_sd->p_sys  = p_sys;
 117
 118 #if defined( HAVE_HAL_1 ) && defined( HAVE_DBUS_2 )
 119     dbus_error_init( &dbus_error );
 120
 121     p_sys->p_ctx = libhal_ctx_new();
 122     if( !p_sys->p_ctx )
 123     {
 124         msg_Err( p_sd, "unable to create HAL context") ;
 125         free( p_sys );
 126         return VLC_EGENERIC;
 127     }
 128     p_connection = dbus_bus_get( DBUS_BUS_SYSTEM, &dbus_error );
 129     if( dbus_error_is_set( &dbus_error ) )
 130     {
 131         msg_Err( p_sd, "unable to connect to DBUS: %s", dbus_error.message );
 132         dbus_error_free( &dbus_error );
 133         free( p_sys );
 134         return VLC_EGENERIC;
 135     }
 136     libhal_ctx_set_dbus_connection( p_sys->p_ctx, 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 #if defined( HAVE_HAL_1 ) && defined( HAVE_DBUS_2 )
 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 #if defined( HAVE_HAL_1 ) && defined( HAVE_DBUS_2 )
 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 #if defined( HAVE_HAL_1 ) && defined( HAVE_DBUS_2 )
 197     while( p_sys->i_devices_number > 0 );
 198     {
 199         struct udi_input_id_t *p_udi_entry = p_sys->pp_devices[0];
 200         if( p_udi_entry->psz_udi ) free( p_udi_entry->psz_udi );
 201         TAB_REMOVE( p_sys->i_devices_number, p_sys->pp_devices, 0 );
 202         if( p_udi_entry ) free( p_udi_entry );
 203     }
 204     p_sys->pp_devices = NULL;
 205 #endif
 206 }
 207
 208 static void AddItem( services_discovery_t *p_sd, input_item_t * p_input
 209 #if defined( HAVE_HAL_1 ) && defined( HAVE_DBUS_2 )
 210                 ,char* psz_device
 211 #endif
 212                     )
 213 {
 214     playlist_item_t *p_item;
 215     services_discovery_sys_t *p_sys  = p_sd->p_sys;
 216     playlist_t *p_playlist = (playlist_t *)vlc_object_find( p_sd,
 217                                         VLC_OBJECT_PLAYLIST, FIND_ANYWHERE );
 218     if( !p_playlist )
 219     {
 220         msg_Err( p_sd, "playlist not found" );
 221         return;
 222     }
 223     p_item = playlist_NodeAddInput( p_playlist, p_input,p_sd->p_sys->p_node_cat,
 224                                     PLAYLIST_APPEND, PLAYLIST_END );
 225     p_item->i_flags &= ~PLAYLIST_SKIP_FLAG;
 226     p_item = playlist_NodeAddInput( p_playlist, p_input,p_sd->p_sys->p_node_one,
 227                                     PLAYLIST_APPEND, PLAYLIST_END );
 228     p_item->i_flags &= ~PLAYLIST_SKIP_FLAG;
 229
 230     vlc_object_release( p_playlist );
 231
 232 #if defined( HAVE_HAL_1 ) && defined( HAVE_DBUS_2 )
 233     struct udi_input_id_t *p_udi_entry;
 234     p_udi_entry = malloc( sizeof( struct udi_input_id_t ) );
 235     if( !p_udi_entry )
 236     {
 237         return;
 238     }
 239     p_udi_entry->i_id = p_item->i_id;
 240     p_udi_entry->psz_udi = strdup( psz_device );
 241     TAB_APPEND( p_sys->i_devices_number, p_sys->pp_devices, p_udi_entry );
 242 #endif
 243 }
 244
 245 static void AddDvd( services_discovery_t *p_sd, char *psz_device )
 246 {
 247     char *psz_name;
 248     char *psz_uri;
 249     char *psz_blockdevice;
 250     input_item_t        *p_input;
 251 #if defined( HAVE_HAL_1 ) && defined( HAVE_DBUS_2 )
 252     psz_name = libhal_device_get_property_string( p_sd->p_sys->p_ctx,
 253                                         psz_device, "volume.label", NULL );
 254     psz_blockdevice = libhal_device_get_property_string( p_sd->p_sys->p_ctx,
 255                                         psz_device, "block.device", NULL );
 256 #else
 257     psz_name = hal_device_get_property_string( p_sd->p_sys->p_ctx,
 258                                                psz_device, "volume.label" );
 259     psz_blockdevice = hal_device_get_property_string( p_sd->p_sys->p_ctx,
 260                                                  psz_device, "block.device" );
 261 #endif
 262     asprintf( &psz_uri, "dvd://%s", psz_blockdevice );
 263     /* Create the playlist item here */
 264     p_input = input_ItemNew( p_sd, psz_uri, psz_name );
 265     free( psz_uri );
 266     if( !p_input )
 267     {
 268         return;
 269     }
 270 #if defined( HAVE_HAL_1 ) && defined( HAVE_DBUS_2 )
 271     AddItem( p_sd, p_input, psz_device );
 272 #else
 273     AddItem( p_sd, p_input );
 274 #endif
 275 }
 276
 277 #if defined( HAVE_HAL_1 ) && defined( HAVE_DBUS_2 )
 278 static void DelItem( services_discovery_t *p_sd, char* psz_udi )
 279 {
 280     services_discovery_sys_t    *p_sys  = p_sd->p_sys;
 281     int                         i;
 282
 283     playlist_t *p_playlist = (playlist_t *)vlc_object_find( p_sd,
 284                                         VLC_OBJECT_PLAYLIST, FIND_ANYWHERE );
 285     if( !p_playlist )
 286     {
 287         msg_Err( p_sd, "playlist not found" );
 288         return;
 289     }
 290
 291     for( i = 0; i < p_sys->i_devices_number; i++ )
 292     {
 293         if( strcmp( psz_udi, p_sys->pp_devices[i]->psz_udi ) == 0 )
 294         {
 295             playlist_DeleteFromItemId( p_playlist, p_sys->pp_devices[i]->i_id );
 296         }
 297     }
 298
 299     vlc_object_release( p_playlist );
 300 }
 301 #endif
 302
 303 static void AddCdda( services_discovery_t *p_sd, char *psz_device )
 304 {
 305     char *psz_uri;
 306     char *psz_blockdevice;
 307     input_item_t     *p_input;
 308 #if defined( HAVE_HAL_1 ) && defined( HAVE_DBUS_2 )
 309     psz_blockdevice = libhal_device_get_property_string( p_sd->p_sys->p_ctx,
 310                                             psz_device, "block.device", NULL );
 311 #else
 312     psz_blockdevice = hal_device_get_property_string( p_sd->p_sys->p_ctx,
 313                                                  psz_device, "block.device" );
 314 #endif
 315     asprintf( &psz_uri, "cdda://%s", psz_blockdevice );
 316     /* Create the playlist item here */
 317     p_input = input_ItemNew( p_sd, psz_uri, "Audio CD" );
 318     free( psz_uri );
 319     if( !p_input )
 320         return;
 321 #if defined( HAVE_HAL_1 ) && defined( HAVE_DBUS_2 )
 322     AddItem( p_sd, p_input, psz_device );
 323 #else
 324     AddItem( p_sd, p_input );
 325 #endif
 326 }
 327
 328 static void ParseDevice( services_discovery_t *p_sd, char *psz_device )
 329 {
 330     char *psz_disc_type;
 331     services_discovery_sys_t    *p_sys  = p_sd->p_sys;
 332 #if defined( HAVE_HAL_1 ) && defined( HAVE_DBUS_2 )
 333     if( libhal_device_property_exists( p_sys->p_ctx, psz_device,
 334                                        "volume.disc.type", NULL ) )
 335     {
 336         psz_disc_type = libhal_device_get_property_string( p_sys->p_ctx,
 337                                                         psz_device,
 338                                                         "volume.disc.type",
 339                                                         NULL );
 340 #else
 341     if( hal_device_property_exists( p_sys->p_ctx, psz_device,
 342                                     "volume.disc.type" ) )
 343     {
 344         psz_disc_type = hal_device_get_property_string( p_sys->p_ctx,
 345                                                         psz_device,
 346                                                         "volume.disc.type" );
 347 #endif
 348         if( !strcmp( psz_disc_type, "dvd_rom" ) )
 349         {
 350 #if defined( HAVE_HAL_1 ) && defined( HAVE_DBUS_2 )
 351             /* hal 0.2.9.7 (HAVE_HAL) has not is_videodvd
 352              * but hal 0.5.0 (HAVE_HAL_1) has */
 353             if (libhal_device_get_property_bool( p_sys->p_ctx, psz_device,
 354                                          "volume.disc.is_videodvd", NULL ) )
 355 #endif
 356             AddDvd( p_sd, psz_device );
 357         }
 358         else if( !strcmp( psz_disc_type, "cd_rom" ) )
 359         {
 360 #if defined( HAVE_HAL_1 ) && defined( HAVE_DBUS_2 )
 361             if( libhal_device_get_property_bool( p_sys->p_ctx, psz_device,
 362                                          "volume.disc.has_audio" , NULL ) )
 363 #else
 364             if( hal_device_get_property_bool( p_sys->p_ctx, psz_device,
 365                                          "volume.disc.has_audio" ) )
 366 #endif
 367             {
 368                 AddCdda( p_sd, psz_device );
 369             }
 370         }
 371     }
 372 }
 373
 374 /*****************************************************************************
 375  * Run: main HAL thread
 376  *****************************************************************************/
 377 static void Run( services_discovery_t *p_sd )
 378 {
 379     int i, i_devices;
 380     char **devices;
 381     services_discovery_sys_t    *p_sys  = p_sd->p_sys;
 382
 383     /* parse existing devices first */
 384 #if defined( HAVE_HAL_1 ) && defined( HAVE_DBUS_2 )
 385     if( ( devices = libhal_get_all_devices( p_sys->p_ctx, &i_devices, NULL ) ) )
 386 #else
 387     if( ( devices = hal_get_all_devices( p_sys->p_ctx, &i_devices ) ) )
 388 #endif
 389     {
 390         for( i = 0; i < i_devices; i++ )
 391         {
 392             ParseDevice( p_sd, devices[ i ] );
 393 #if defined( HAVE_HAL_1 ) && defined( HAVE_DBUS_2 )
 394             libhal_free_string( devices[ i ] );
 395 #else
 396             hal_free_string( devices[ i ] );
 397 #endif
 398
 399         }
 400     }
 401 #if defined( HAVE_HAL_1 ) && defined( HAVE_DBUS_2 )
 402     while( !p_sd->b_die )
 403     {
 404     /* look for events on the bus, blocking 1 second */
 405     dbus_connection_read_write_dispatch(
 406             libhal_ctx_get_dbus_connection(p_sys->p_ctx), 1000 );
 407     }
 408 #endif
 409
 410 }
 411
 412 #if defined( HAVE_HAL_1 ) && defined( HAVE_DBUS_2 )
 413 void DeviceAdded( LibHalContext *p_ctx, const char *psz_udi )
 414 {
 415         ParseDevice( p_sd_global, (char*) psz_udi );
 416 }
 417 void DeviceRemoved( LibHalContext *p_ctx, const char *psz_udi )
 418 {
 419         DelItem( p_sd_global, (char*) psz_udi );
 420 }
 421 #endif
 422