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 #ifdef HAVE_CONFIG_H
  27 # include "config.h"
  28 #endif
  29
  30 #include <vlc/vlc.h>
  31 #include <vlc_playlist.h>
  32
  33 #include <vlc_network.h>
  34
  35 #include <errno.h>                                                 /* ENOMEM */
  36
  37 #ifdef HAVE_UNISTD_H
  38 #    include <unistd.h>
  39 #endif
  40 #ifdef HAVE_SYS_TIME_H
  41 #    include <sys/time.h>
  42 #endif
  43
  44 #include <hal/libhal.h>
  45
  46 #define MAX_LINE_LENGTH 256
  47
  48 /*****************************************************************************
  49  * Local prototypes
  50  *****************************************************************************/
  51 #ifdef HAVE_HAL_1
  52 /* store relation between item id and udi for ejection */
  53 struct udi_input_id_t
  54 {
  55     char            *psz_udi;
  56     input_item_t    *p_item;
  57 };
  58 #endif
  59
  60 struct services_discovery_sys_t
  61 {
  62     LibHalContext           *p_ctx;
  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 #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     services_discovery_SetLocalizedName( p_sd, _("Devices") );
 164
 165     return VLC_SUCCESS;
 166 }
 167
 168 /*****************************************************************************
 169  * Close:
 170  *****************************************************************************/
 171 static void Close( vlc_object_t *p_this )
 172 {
 173     services_discovery_t *p_sd = ( services_discovery_t* )p_this;
 174     services_discovery_sys_t *p_sys  = p_sd->p_sys;
 175 #ifdef HAVE_HAL_1
 176     dbus_connection_unref( p_sys->p_connection );
 177     struct udi_input_id_t *p_udi_entry;
 178
 179     while( p_sys->i_devices_number > 0 )
 180     {
 181         p_udi_entry = p_sys->pp_devices[0];
 182         if( p_udi_entry->psz_udi ) free( p_udi_entry->psz_udi );
 183         TAB_REMOVE( p_sys->i_devices_number, p_sys->pp_devices,
 184                 p_sys->pp_devices[0] );
 185         if( p_udi_entry ) free( p_udi_entry );
 186     }
 187     p_sys->pp_devices = NULL;
 188 #endif
 189     free( p_sys );
 190 }
 191
 192 static void AddItem( services_discovery_t *p_sd, input_item_t * p_input
 193 #ifdef HAVE_HAL_1
 194                 ,char* psz_device
 195 #endif
 196                     )
 197 {
 198     services_discovery_sys_t *p_sys  = p_sd->p_sys;
 199     services_discovery_AddItem( p_sd, p_input, NULL /* no category */ );
 200
 201 #ifdef HAVE_HAL_1
 202     struct udi_input_id_t *p_udi_entry;
 203     p_udi_entry = malloc( sizeof( struct udi_input_id_t ) );
 204     if( !p_udi_entry )
 205     {
 206         return;
 207     }
 208     vlc_gc_incref( p_input );
 209     p_udi_entry->p_item = p_input;
 210     p_udi_entry->psz_udi = strdup( psz_device );
 211     TAB_APPEND( p_sys->i_devices_number, p_sys->pp_devices, p_udi_entry );
 212 #endif
 213 }
 214
 215 static void AddDvd( services_discovery_t *p_sd, char *psz_device )
 216 {
 217     char *psz_name;
 218     char *psz_uri;
 219     char *psz_blockdevice;
 220     input_item_t        *p_input;
 221 #ifdef HAVE_HAL_1
 222     psz_name = libhal_device_get_property_string( p_sd->p_sys->p_ctx,
 223                                         psz_device, "volume.label", NULL );
 224     psz_blockdevice = libhal_device_get_property_string( p_sd->p_sys->p_ctx,
 225                                         psz_device, "block.device", NULL );
 226 #else
 227     psz_name = hal_device_get_property_string( p_sd->p_sys->p_ctx,
 228                                                psz_device, "volume.label" );
 229     psz_blockdevice = hal_device_get_property_string( p_sd->p_sys->p_ctx,
 230                                                  psz_device, "block.device" );
 231 #endif
 232     if( asprintf( &psz_uri, "dvd://%s", psz_blockdevice ) == -1 )
 233         return;
 234     /* Create the playlist item here */
 235     p_input = input_ItemNew( p_sd, psz_uri, psz_name );
 236     free( psz_uri );
 237     if( !p_input )
 238     {
 239         return;
 240     }
 241 #ifdef HAVE_HAL_1
 242     AddItem( p_sd, p_input, psz_device );
 243 #else
 244     AddItem( p_sd, p_input );
 245 #endif
 246     vlc_gc_decref( p_input );
 247 }
 248
 249 #ifdef HAVE_HAL_1
 250 static void DelItem( services_discovery_t *p_sd, char* psz_udi )
 251 {
 252     services_discovery_sys_t    *p_sys  = p_sd->p_sys;
 253
 254     int i;
 255     for( i = 0; i < p_sys->i_devices_number; i++ )
 256     { /*  looks for a matching udi */
 257         if( strcmp( psz_udi, p_sys->pp_devices[i]->psz_udi ) == 0 )
 258         { /* delete the corresponding item */
 259             services_discovery_RemoveItem( p_sd, p_sys->pp_devices[i]->p_item );
 260             vlc_gc_decref( p_sys->pp_devices[i]->p_item );
 261             if( p_sys->pp_devices[i]->psz_udi )
 262                 free( p_sys->pp_devices[i]->psz_udi );
 263             TAB_REMOVE( p_sys->i_devices_number, p_sys->pp_devices,
 264                     p_sys->pp_devices[i] );
 265         }
 266     }
 267 }
 268 #endif
 269
 270 static void AddCdda( services_discovery_t *p_sd, char *psz_device )
 271 {
 272     char *psz_uri;
 273     char *psz_blockdevice;
 274     input_item_t     *p_input;
 275 #ifdef HAVE_HAL_1
 276     psz_blockdevice = libhal_device_get_property_string( p_sd->p_sys->p_ctx,
 277                                             psz_device, "block.device", NULL );
 278 #else
 279     psz_blockdevice = hal_device_get_property_string( p_sd->p_sys->p_ctx,
 280                                                  psz_device, "block.device" );
 281 #endif
 282     if( asprintf( &psz_uri, "cdda://%s", psz_blockdevice ) == -1 )
 283         return;
 284     /* Create the item here */
 285     p_input = input_ItemNew( p_sd, psz_uri, "Audio CD" );
 286     free( psz_uri );
 287     if( !p_input )
 288         return;
 289 #ifdef HAVE_HAL_1
 290     AddItem( p_sd, p_input, psz_device );
 291 #else
 292     AddItem( p_sd, p_input );
 293 #endif
 294     vlc_gc_decref( p_input );
 295 }
 296
 297 static void ParseDevice( services_discovery_t *p_sd, char *psz_device )
 298 {
 299     char *psz_disc_type;
 300     services_discovery_sys_t    *p_sys  = p_sd->p_sys;
 301 #ifdef HAVE_HAL_1
 302     if( libhal_device_property_exists( p_sys->p_ctx, psz_device,
 303                                        "volume.disc.type", NULL ) )
 304     {
 305         psz_disc_type = libhal_device_get_property_string( p_sys->p_ctx,
 306                                                         psz_device,
 307                                                         "volume.disc.type",
 308                                                         NULL );
 309 #else
 310     if( hal_device_property_exists( p_sys->p_ctx, psz_device,
 311                                     "volume.disc.type" ) )
 312     {
 313         psz_disc_type = hal_device_get_property_string( p_sys->p_ctx,
 314                                                         psz_device,
 315                                                         "volume.disc.type" );
 316 #endif
 317         if( !strncmp( psz_disc_type, "dvd_r", 5 ) )
 318         {
 319 #ifdef HAVE_HAL_1
 320             /* hal 0.2.9.7 (HAVE_HAL) has not is_videodvd
 321              * but hal 0.5.0 (HAVE_HAL_1) has */
 322             if (libhal_device_get_property_bool( p_sys->p_ctx, psz_device,
 323                                          "volume.disc.is_videodvd", NULL ) )
 324 #endif
 325             AddDvd( p_sd, psz_device );
 326         }
 327         else if( !strncmp( psz_disc_type, "cd_r", 4 ) )
 328         {
 329 #ifdef HAVE_HAL_1
 330             if( libhal_device_get_property_bool( p_sys->p_ctx, psz_device,
 331                                          "volume.disc.has_audio" , NULL ) )
 332 #else
 333             if( hal_device_get_property_bool( p_sys->p_ctx, psz_device,
 334                                          "volume.disc.has_audio" ) )
 335 #endif
 336             {
 337                 AddCdda( p_sd, psz_device );
 338             }
 339         }
 340     }
 341 }
 342
 343 /*****************************************************************************
 344  * Run: main HAL thread
 345  *****************************************************************************/
 346 static void Run( services_discovery_t *p_sd )
 347 {
 348     int i, i_devices;
 349     char **devices;
 350     services_discovery_sys_t    *p_sys  = p_sd->p_sys;
 351
 352     /* parse existing devices first */
 353 #ifdef HAVE_HAL_1
 354     if( ( devices = libhal_get_all_devices( p_sys->p_ctx, &i_devices, NULL ) ) )
 355 #else
 356     if( ( devices = hal_get_all_devices( p_sys->p_ctx, &i_devices ) ) )
 357 #endif
 358     {
 359         for( i = 0; i < i_devices; i++ )
 360         {
 361             ParseDevice( p_sd, devices[ i ] );
 362 #ifdef HAVE_HAL_1
 363             libhal_free_string( devices[ i ] );
 364 #else
 365             hal_free_string( devices[ i ] );
 366 #endif
 367
 368         }
 369     }
 370 #ifdef HAVE_HAL_1
 371     while( !p_sd->b_die )
 372     {
 373     /* look for events on the bus, blocking 1 second */
 374     dbus_connection_read_write_dispatch( p_sys->p_connection, 1000 );
 375     /* HAL 0.5.8.1 can use libhal_ctx_get_dbus_connection(p_sys->p_ctx) */
 376     }
 377 #endif
 378
 379 }
 380
 381 #ifdef HAVE_HAL_1
 382 void DeviceAdded( LibHalContext *p_ctx, const char *psz_udi )
 383 {
 384         ParseDevice( p_sd_global, (char*) psz_udi );
 385 }
 386 void DeviceRemoved( LibHalContext *p_ctx, const char *psz_udi )
 387 {
 388         DelItem( p_sd_global, (char*) psz_udi );
 389 }
 390 #endif
 391