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     struct udi_input_id_t *p_udi_entry;
 198
 199     while( p_sys->i_devices_number > 0 )
 200     {
 201         p_udi_entry = p_sys->pp_devices[0];
 202         if( p_udi_entry->psz_udi ) free( p_udi_entry->psz_udi );
 203         TAB_REMOVE( p_sys->i_devices_number, p_sys->pp_devices,
 204                 p_sys->pp_devices[0] );
 205         if( p_udi_entry ) free( p_udi_entry );
 206     }
 207     p_sys->pp_devices = NULL;
 208 #endif
 209 }
 210
 211 static void AddItem( services_discovery_t *p_sd, input_item_t * p_input
 212 #if defined( HAVE_HAL_1 ) && defined( HAVE_DBUS_2 )
 213                 ,char* psz_device
 214 #endif
 215                     )
 216 {
 217     playlist_item_t *p_item;
 218     services_discovery_sys_t *p_sys  = p_sd->p_sys;
 219     playlist_t *p_playlist = (playlist_t *)vlc_object_find( p_sd,
 220                                         VLC_OBJECT_PLAYLIST, FIND_ANYWHERE );
 221     if( !p_playlist )
 222     {
 223         msg_Err( p_sd, "playlist not found" );
 224         return;
 225     }
 226     p_item = playlist_NodeAddInput( p_playlist, p_input,p_sd->p_sys->p_node_cat,
 227                                     PLAYLIST_APPEND, PLAYLIST_END );
 228     p_item->i_flags &= ~PLAYLIST_SKIP_FLAG;
 229     p_item = playlist_NodeAddInput( p_playlist, p_input,p_sd->p_sys->p_node_one,
 230                                     PLAYLIST_APPEND, PLAYLIST_END );
 231     p_item->i_flags &= ~PLAYLIST_SKIP_FLAG;
 232
 233     vlc_object_release( p_playlist );
 234
 235 #if defined( HAVE_HAL_1 ) && defined( HAVE_DBUS_2 )
 236     struct udi_input_id_t *p_udi_entry;
 237     p_udi_entry = malloc( sizeof( struct udi_input_id_t ) );
 238     if( !p_udi_entry )
 239     {
 240         return;
 241     }
 242     p_udi_entry->i_id = p_item->i_id;
 243     p_udi_entry->psz_udi = strdup( psz_device );
 244     TAB_APPEND( p_sys->i_devices_number, p_sys->pp_devices, p_udi_entry );
 245 #endif
 246 }
 247
 248 static void AddDvd( services_discovery_t *p_sd, char *psz_device )
 249 {
 250     char *psz_name;
 251     char *psz_uri;
 252     char *psz_blockdevice;
 253     input_item_t        *p_input;
 254 #if defined( HAVE_HAL_1 ) && defined( HAVE_DBUS_2 )
 255     psz_name = libhal_device_get_property_string( p_sd->p_sys->p_ctx,
 256                                         psz_device, "volume.label", NULL );
 257     psz_blockdevice = libhal_device_get_property_string( p_sd->p_sys->p_ctx,
 258                                         psz_device, "block.device", NULL );
 259 #else
 260     psz_name = hal_device_get_property_string( p_sd->p_sys->p_ctx,
 261                                                psz_device, "volume.label" );
 262     psz_blockdevice = hal_device_get_property_string( p_sd->p_sys->p_ctx,
 263                                                  psz_device, "block.device" );
 264 #endif
 265     asprintf( &psz_uri, "dvd://%s", psz_blockdevice );
 266     /* Create the playlist item here */
 267     p_input = input_ItemNew( p_sd, psz_uri, psz_name );
 268     free( psz_uri );
 269     if( !p_input )
 270     {
 271         return;
 272     }
 273 #if defined( HAVE_HAL_1 ) && defined( HAVE_DBUS_2 )
 274     AddItem( p_sd, p_input, psz_device );
 275 #else
 276     AddItem( p_sd, p_input );
 277 #endif
 278 }
 279
 280 #if defined( HAVE_HAL_1 ) && defined( HAVE_DBUS_2 )
 281 static void DelItem( services_discovery_t *p_sd, char* psz_udi )
 282 {
 283     services_discovery_sys_t    *p_sys  = p_sd->p_sys;
 284     int                         i;
 285
 286     playlist_t *p_playlist = (playlist_t *)vlc_object_find( p_sd,
 287                                         VLC_OBJECT_PLAYLIST, FIND_ANYWHERE );
 288     if( !p_playlist )
 289     {
 290         msg_Err( p_sd, "playlist not found" );
 291         return;
 292     }
 293
 294     for( i = 0; i < p_sys->i_devices_number; i++ )
 295     {
 296         if( strcmp( psz_udi, p_sys->pp_devices[i]->psz_udi ) == 0 )
 297         {
 298             playlist_DeleteFromItemId( p_playlist, p_sys->pp_devices[i]->i_id );
 299             TAB_REMOVE( p_sys->i_devices_number, p_sys->pp_devices,
 300                     p_sys->pp_devices[i] );
 301         }
 302     }
 303
 304     vlc_object_release( p_playlist );
 305 }
 306 #endif
 307
 308 static void AddCdda( services_discovery_t *p_sd, char *psz_device )
 309 {
 310     char *psz_uri;
 311     char *psz_blockdevice;
 312     input_item_t     *p_input;
 313 #if defined( HAVE_HAL_1 ) && defined( HAVE_DBUS_2 )
 314     psz_blockdevice = libhal_device_get_property_string( p_sd->p_sys->p_ctx,
 315                                             psz_device, "block.device", NULL );
 316 #else
 317     psz_blockdevice = hal_device_get_property_string( p_sd->p_sys->p_ctx,
 318                                                  psz_device, "block.device" );
 319 #endif
 320     asprintf( &psz_uri, "cdda://%s", psz_blockdevice );
 321     /* Create the playlist item here */
 322     p_input = input_ItemNew( p_sd, psz_uri, "Audio CD" );
 323     free( psz_uri );
 324     if( !p_input )
 325         return;
 326 #if defined( HAVE_HAL_1 ) && defined( HAVE_DBUS_2 )
 327     AddItem( p_sd, p_input, psz_device );
 328 #else
 329     AddItem( p_sd, p_input );
 330 #endif
 331 }
 332
 333 static void ParseDevice( services_discovery_t *p_sd, char *psz_device )
 334 {
 335     char *psz_disc_type;
 336     services_discovery_sys_t    *p_sys  = p_sd->p_sys;
 337 #if defined( HAVE_HAL_1 ) && defined( HAVE_DBUS_2 )
 338     if( libhal_device_property_exists( p_sys->p_ctx, psz_device,
 339                                        "volume.disc.type", NULL ) )
 340     {
 341         psz_disc_type = libhal_device_get_property_string( p_sys->p_ctx,
 342                                                         psz_device,
 343                                                         "volume.disc.type",
 344                                                         NULL );
 345 #else
 346     if( hal_device_property_exists( p_sys->p_ctx, psz_device,
 347                                     "volume.disc.type" ) )
 348     {
 349         psz_disc_type = hal_device_get_property_string( p_sys->p_ctx,
 350                                                         psz_device,
 351                                                         "volume.disc.type" );
 352 #endif
 353         if( !strcmp( psz_disc_type, "dvd_rom" ) )
 354         {
 355 #if defined( HAVE_HAL_1 ) && defined( HAVE_DBUS_2 )
 356             /* hal 0.2.9.7 (HAVE_HAL) has not is_videodvd
 357              * but hal 0.5.0 (HAVE_HAL_1) has */
 358             if (libhal_device_get_property_bool( p_sys->p_ctx, psz_device,
 359                                          "volume.disc.is_videodvd", NULL ) )
 360 #endif
 361             AddDvd( p_sd, psz_device );
 362         }
 363         else if( !strcmp( psz_disc_type, "cd_rom" ) )
 364         {
 365 #if defined( HAVE_HAL_1 ) && defined( HAVE_DBUS_2 )
 366             if( libhal_device_get_property_bool( p_sys->p_ctx, psz_device,
 367                                          "volume.disc.has_audio" , NULL ) )
 368 #else
 369             if( hal_device_get_property_bool( p_sys->p_ctx, psz_device,
 370                                          "volume.disc.has_audio" ) )
 371 #endif
 372             {
 373                 AddCdda( p_sd, psz_device );
 374             }
 375         }
 376     }
 377 }
 378
 379 /*****************************************************************************
 380  * Run: main HAL thread
 381  *****************************************************************************/
 382 static void Run( services_discovery_t *p_sd )
 383 {
 384     int i, i_devices;
 385     char **devices;
 386     services_discovery_sys_t    *p_sys  = p_sd->p_sys;
 387
 388     /* parse existing devices first */
 389 #if defined( HAVE_HAL_1 ) && defined( HAVE_DBUS_2 )
 390     if( ( devices = libhal_get_all_devices( p_sys->p_ctx, &i_devices, NULL ) ) )
 391 #else
 392     if( ( devices = hal_get_all_devices( p_sys->p_ctx, &i_devices ) ) )
 393 #endif
 394     {
 395         for( i = 0; i < i_devices; i++ )
 396         {
 397             ParseDevice( p_sd, devices[ i ] );
 398 #if defined( HAVE_HAL_1 ) && defined( HAVE_DBUS_2 )
 399             libhal_free_string( devices[ i ] );
 400 #else
 401             hal_free_string( devices[ i ] );
 402 #endif
 403
 404         }
 405     }
 406 #if defined( HAVE_HAL_1 ) && defined( HAVE_DBUS_2 )
 407     while( !p_sd->b_die )
 408     {
 409     /* look for events on the bus, blocking 1 second */
 410     dbus_connection_read_write_dispatch(
 411             libhal_ctx_get_dbus_connection(p_sys->p_ctx), 1000 );
 412     }
 413 #endif
 414
 415 }
 416
 417 #if defined( HAVE_HAL_1 ) && defined( HAVE_DBUS_2 )
 418 void DeviceAdded( LibHalContext *p_ctx, const char *psz_udi )
 419 {
 420         ParseDevice( p_sd_global, (char*) psz_udi );
 421 }
 422 void DeviceRemoved( LibHalContext *p_ctx, const char *psz_udi )
 423 {
 424         DelItem( p_sd_global, (char*) psz_udi );
 425 }
 426 #endif
 427