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     vlc_gc_incref( p_input );
 205     p_udi_entry->p_item = p_input;
 206     p_udi_entry->psz_udi = strdup( psz_device );
 207     TAB_APPEND( p_sys->i_devices_number, p_sys->pp_devices, p_udi_entry );
 208 #endif
 209 }
 210
 211 static void AddDvd( services_discovery_t *p_sd, char *psz_device )
 212 {
 213     char *psz_name;
 214     char *psz_uri;
 215     char *psz_blockdevice;
 216     input_item_t        *p_input;
 217 #ifdef HAVE_HAL_1
 218     psz_name = libhal_device_get_property_string( p_sd->p_sys->p_ctx,
 219                                         psz_device, "volume.label", NULL );
 220     psz_blockdevice = libhal_device_get_property_string( p_sd->p_sys->p_ctx,
 221                                         psz_device, "block.device", NULL );
 222 #else
 223     psz_name = hal_device_get_property_string( p_sd->p_sys->p_ctx,
 224                                                psz_device, "volume.label" );
 225     psz_blockdevice = hal_device_get_property_string( p_sd->p_sys->p_ctx,
 226                                                  psz_device, "block.device" );
 227 #endif
 228     if( asprintf( &psz_uri, "dvd://%s", psz_blockdevice ) == -1 )
 229         return;
 230     /* Create the playlist item here */
 231     p_input = input_ItemNew( p_sd, psz_uri, psz_name );
 232     free( psz_uri );
 233     if( !p_input )
 234     {
 235         return;
 236     }
 237 #ifdef HAVE_HAL_1
 238     AddItem( p_sd, p_input, psz_device );
 239 #else
 240     AddItem( p_sd, p_input );
 241 #endif
 242     vlc_gc_decref( p_input );
 243 }
 244
 245 #ifdef HAVE_HAL_1
 246 static void DelItem( services_discovery_t *p_sd, char* psz_udi )
 247 {
 248     services_discovery_sys_t    *p_sys  = p_sd->p_sys;
 249
 250     int i;
 251     for( i = 0; i < p_sys->i_devices_number; i++ )
 252     { /*  looks for a matching udi */
 253         if( strcmp( psz_udi, p_sys->pp_devices[i]->psz_udi ) == 0 )
 254         { /* delete the corresponding item */
 255             services_discovery_RemoveItem( p_sd, p_sys->pp_devices[i]->p_item );
 256             vlc_gc_decref( p_sys->pp_devices[i]->p_item );
 257             if( p_sys->pp_devices[i]->psz_udi )
 258                 free( p_sys->pp_devices[i]->psz_udi );
 259             TAB_REMOVE( p_sys->i_devices_number, p_sys->pp_devices,
 260                     p_sys->pp_devices[i] );
 261         }
 262     }
 263 }
 264 #endif
 265
 266 static void AddCdda( services_discovery_t *p_sd, char *psz_device )
 267 {
 268     char *psz_uri;
 269     char *psz_blockdevice;
 270     input_item_t     *p_input;
 271 #ifdef HAVE_HAL_1
 272     psz_blockdevice = libhal_device_get_property_string( p_sd->p_sys->p_ctx,
 273                                             psz_device, "block.device", NULL );
 274 #else
 275     psz_blockdevice = hal_device_get_property_string( p_sd->p_sys->p_ctx,
 276                                                  psz_device, "block.device" );
 277 #endif
 278     if( asprintf( &psz_uri, "cdda://%s", psz_blockdevice ) == -1 )
 279         return;
 280     /* Create the item here */
 281     p_input = input_ItemNew( p_sd, psz_uri, "Audio CD" );
 282     free( psz_uri );
 283     if( !p_input )
 284         return;
 285 #ifdef HAVE_HAL_1
 286     AddItem( p_sd, p_input, psz_device );
 287 #else
 288     AddItem( p_sd, p_input );
 289 #endif
 290     vlc_gc_decref( p_input );
 291 }
 292
 293 static void ParseDevice( services_discovery_t *p_sd, char *psz_device )
 294 {
 295     char *psz_disc_type;
 296     services_discovery_sys_t    *p_sys  = p_sd->p_sys;
 297 #ifdef HAVE_HAL_1
 298     if( libhal_device_property_exists( p_sys->p_ctx, psz_device,
 299                                        "volume.disc.type", NULL ) )
 300     {
 301         psz_disc_type = libhal_device_get_property_string( p_sys->p_ctx,
 302                                                         psz_device,
 303                                                         "volume.disc.type",
 304                                                         NULL );
 305 #else
 306     if( hal_device_property_exists( p_sys->p_ctx, psz_device,
 307                                     "volume.disc.type" ) )
 308     {
 309         psz_disc_type = hal_device_get_property_string( p_sys->p_ctx,
 310                                                         psz_device,
 311                                                         "volume.disc.type" );
 312 #endif
 313         if( !strncmp( psz_disc_type, "dvd_r", 5 ) )
 314         {
 315 #ifdef HAVE_HAL_1
 316             /* hal 0.2.9.7 (HAVE_HAL) has not is_videodvd
 317              * but hal 0.5.0 (HAVE_HAL_1) has */
 318             if (libhal_device_get_property_bool( p_sys->p_ctx, psz_device,
 319                                          "volume.disc.is_videodvd", NULL ) )
 320 #endif
 321             AddDvd( p_sd, psz_device );
 322         }
 323         else if( !strncmp( psz_disc_type, "cd_r", 4 ) )
 324         {
 325 #ifdef HAVE_HAL_1
 326             if( libhal_device_get_property_bool( p_sys->p_ctx, psz_device,
 327                                          "volume.disc.has_audio" , NULL ) )
 328 #else
 329             if( hal_device_get_property_bool( p_sys->p_ctx, psz_device,
 330                                          "volume.disc.has_audio" ) )
 331 #endif
 332             {
 333                 AddCdda( p_sd, psz_device );
 334             }
 335         }
 336     }
 337 }
 338
 339 /*****************************************************************************
 340  * Run: main HAL thread
 341  *****************************************************************************/
 342 static void Run( services_discovery_t *p_sd )
 343 {
 344     int i, i_devices;
 345     char **devices;
 346     services_discovery_sys_t    *p_sys  = p_sd->p_sys;
 347
 348     /* parse existing devices first */
 349 #ifdef HAVE_HAL_1
 350     if( ( devices = libhal_get_all_devices( p_sys->p_ctx, &i_devices, NULL ) ) )
 351 #else
 352     if( ( devices = hal_get_all_devices( p_sys->p_ctx, &i_devices ) ) )
 353 #endif
 354     {
 355         for( i = 0; i < i_devices; i++ )
 356         {
 357             ParseDevice( p_sd, devices[ i ] );
 358 #ifdef HAVE_HAL_1
 359             libhal_free_string( devices[ i ] );
 360 #else
 361             hal_free_string( devices[ i ] );
 362 #endif
 363
 364         }
 365     }
 366 #ifdef HAVE_HAL_1
 367     while( !p_sd->b_die )
 368     {
 369     /* look for events on the bus, blocking 1 second */
 370     dbus_connection_read_write_dispatch( p_sys->p_connection, 1000 );
 371     /* HAL 0.5.8.1 can use libhal_ctx_get_dbus_connection(p_sys->p_ctx) */
 372     }
 373 #endif
 374
 375 }
 376
 377 #ifdef HAVE_HAL_1
 378 void DeviceAdded( LibHalContext *p_ctx, const char *psz_udi )
 379 {
 380         ParseDevice( p_sd_global, (char*) psz_udi );
 381 }
 382 void DeviceRemoved( LibHalContext *p_ctx, const char *psz_udi )
 383 {
 384         DelItem( p_sd_global, (char*) psz_udi );
 385 }
 386 #endif
 387