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     if( !p_sys )
 105         return VLC_ENOMEM;
 106
 107 #ifdef HAVE_HAL_1
 108     DBusError           dbus_error;
 109     DBusConnection      *p_connection;
 110
 111     p_sd_global = p_sd;
 112     p_sys->i_devices_number = 0;
 113     p_sys->pp_devices = NULL;
 114 #endif
 115
 116     p_sd->pf_run = Run;
 117     p_sd->p_sys  = p_sys;
 118
 119 #ifdef HAVE_HAL_1
 120     dbus_error_init( &dbus_error );
 121
 122     p_sys->p_ctx = libhal_ctx_new();
 123     if( !p_sys->p_ctx )
 124     {
 125         msg_Err( p_sd, "unable to create HAL context") ;
 126         free( p_sys );
 127         return VLC_EGENERIC;
 128     }
 129     p_connection = dbus_bus_get( DBUS_BUS_SYSTEM, &dbus_error );
 130     if( dbus_error_is_set( &dbus_error ) )
 131     {
 132         msg_Err( p_sd, "unable to connect to DBUS: %s", dbus_error.message );
 133         dbus_error_free( &dbus_error );
 134         free( p_sys );
 135         return VLC_EGENERIC;
 136     }
 137     libhal_ctx_set_dbus_connection( p_sys->p_ctx, p_connection );
 138     p_sys->p_connection = p_connection;
 139     if( !libhal_ctx_init( p_sys->p_ctx, &dbus_error ) )
 140 #else
 141     if( !(p_sys->p_ctx = hal_initialize( NULL, FALSE ) ) )
 142 #endif
 143     {
 144 #ifdef HAVE_HAL_1
 145         msg_Err( p_sd, "hal not available : %s", dbus_error.message );
 146         dbus_error_free( &dbus_error );
 147 #else
 148         msg_Err( p_sd, "hal not available" );
 149 #endif
 150         free( p_sys );
 151         return VLC_EGENERIC;
 152     }
 153
 154 #ifdef HAVE_HAL_1
 155         if( !libhal_ctx_set_device_added( p_sys->p_ctx, DeviceAdded ) ||
 156                 !libhal_ctx_set_device_removed( p_sys->p_ctx, DeviceRemoved ) )
 157         {
 158             msg_Err( p_sd, "unable to add callback" );
 159             dbus_error_free( &dbus_error );
 160             free( p_sys );
 161             return VLC_EGENERIC;
 162         }
 163 #endif
 164
 165     services_discovery_SetLocalizedName( p_sd, _("Devices") );
 166
 167     return VLC_SUCCESS;
 168 }
 169
 170 /*****************************************************************************
 171  * Close:
 172  *****************************************************************************/
 173 static void Close( vlc_object_t *p_this )
 174 {
 175     services_discovery_t *p_sd = ( services_discovery_t* )p_this;
 176     services_discovery_sys_t *p_sys  = p_sd->p_sys;
 177 #ifdef HAVE_HAL_1
 178     dbus_connection_unref( p_sys->p_connection );
 179     struct udi_input_id_t *p_udi_entry;
 180
 181     while( p_sys->i_devices_number > 0 )
 182     {
 183         p_udi_entry = p_sys->pp_devices[0];
 184         free( p_udi_entry->psz_udi );
 185         TAB_REMOVE( p_sys->i_devices_number, p_sys->pp_devices,
 186                 p_sys->pp_devices[0] );
 187         free( p_udi_entry );
 188     }
 189     p_sys->pp_devices = NULL;
 190 #endif
 191     free( p_sys );
 192 }
 193
 194 static void AddItem( services_discovery_t *p_sd, input_item_t * p_input
 195 #ifdef HAVE_HAL_1
 196                 , const char* psz_device
 197 #endif
 198                     )
 199 {
 200     services_discovery_sys_t *p_sys  = p_sd->p_sys;
 201     services_discovery_AddItem( p_sd, p_input, NULL /* no category */ );
 202
 203 #ifdef HAVE_HAL_1
 204     struct udi_input_id_t *p_udi_entry;
 205     p_udi_entry = malloc( sizeof( struct udi_input_id_t ) );
 206     if( !p_udi_entry )
 207         return;
 208     p_udi_entry->psz_udi = strdup( psz_device );
 209     if( !p_udi_entry->psz_udi )
 210         return;
 211
 212     vlc_gc_incref( p_input );
 213     p_udi_entry->p_item = p_input;
 214     TAB_APPEND( p_sys->i_devices_number, p_sys->pp_devices, p_udi_entry );
 215 #endif
 216 }
 217
 218 static void AddDvd( services_discovery_t *p_sd, const char *psz_device )
 219 {
 220     char *psz_name;
 221     char *psz_uri;
 222     char *psz_blockdevice;
 223     input_item_t        *p_input;
 224 #ifdef HAVE_HAL_1
 225     psz_name = libhal_device_get_property_string( p_sd->p_sys->p_ctx,
 226                                         psz_device, "volume.label", NULL );
 227     psz_blockdevice = libhal_device_get_property_string( p_sd->p_sys->p_ctx,
 228                                         psz_device, "block.device", NULL );
 229 #else
 230     psz_name = hal_device_get_property_string( p_sd->p_sys->p_ctx,
 231                                                psz_device, "volume.label" );
 232     psz_blockdevice = hal_device_get_property_string( p_sd->p_sys->p_ctx,
 233                                                  psz_device, "block.device" );
 234 #endif
 235     if( asprintf( &psz_uri, "dvd://%s", psz_blockdevice ) == -1 )
 236         return;
 237     /* Create the playlist item here */
 238     p_input = input_ItemNew( p_sd, psz_uri, psz_name );
 239     free( psz_uri );
 240     if( !p_input )
 241     {
 242         return;
 243     }
 244 #ifdef HAVE_HAL_1
 245     AddItem( p_sd, p_input, psz_device );
 246 #else
 247     AddItem( p_sd, p_input );
 248 #endif
 249     vlc_gc_decref( p_input );
 250 }
 251
 252 #ifdef HAVE_HAL_1
 253 static void DelItem( services_discovery_t *p_sd, const char* psz_udi )
 254 {
 255     services_discovery_sys_t    *p_sys  = p_sd->p_sys;
 256
 257     int i;
 258     for( i = 0; i < p_sys->i_devices_number; i++ )
 259     { /*  looks for a matching udi */
 260         if( strcmp( psz_udi, p_sys->pp_devices[i]->psz_udi ) == 0 )
 261         { /* delete the corresponding item */
 262             services_discovery_RemoveItem( p_sd, p_sys->pp_devices[i]->p_item );
 263             vlc_gc_decref( p_sys->pp_devices[i]->p_item );
 264             free( p_sys->pp_devices[i]->psz_udi );
 265             TAB_REMOVE( p_sys->i_devices_number, p_sys->pp_devices,
 266                     p_sys->pp_devices[i] );
 267         }
 268     }
 269 }
 270 #endif
 271
 272 static void AddCdda( services_discovery_t *p_sd, const char *psz_device )
 273 {
 274     char *psz_uri;
 275     char *psz_blockdevice;
 276     input_item_t     *p_input;
 277 #ifdef HAVE_HAL_1
 278     psz_blockdevice = libhal_device_get_property_string( p_sd->p_sys->p_ctx,
 279                                             psz_device, "block.device", NULL );
 280 #else
 281     psz_blockdevice = hal_device_get_property_string( p_sd->p_sys->p_ctx,
 282                                                  psz_device, "block.device" );
 283 #endif
 284     if( asprintf( &psz_uri, "cdda://%s", psz_blockdevice ) == -1 )
 285         return;
 286     /* Create the item here */
 287     p_input = input_ItemNew( p_sd, psz_uri, "Audio CD" );
 288     free( psz_uri );
 289     if( !p_input )
 290         return;
 291 #ifdef HAVE_HAL_1
 292     AddItem( p_sd, p_input, psz_device );
 293 #else
 294     AddItem( p_sd, p_input );
 295 #endif
 296     vlc_gc_decref( p_input );
 297 }
 298
 299 static void ParseDevice( services_discovery_t *p_sd, const char *psz_device )
 300 {
 301     char *psz_disc_type;
 302     services_discovery_sys_t    *p_sys  = p_sd->p_sys;
 303 #ifdef HAVE_HAL_1
 304     if( libhal_device_property_exists( p_sys->p_ctx, psz_device,
 305                                        "volume.disc.type", NULL ) )
 306     {
 307         psz_disc_type = libhal_device_get_property_string( p_sys->p_ctx,
 308                                                         psz_device,
 309                                                         "volume.disc.type",
 310                                                         NULL );
 311 #else
 312     if( hal_device_property_exists( p_sys->p_ctx, psz_device,
 313                                     "volume.disc.type" ) )
 314     {
 315         psz_disc_type = hal_device_get_property_string( p_sys->p_ctx,
 316                                                         psz_device,
 317                                                         "volume.disc.type" );
 318 #endif
 319         if( !strncmp( psz_disc_type, "dvd_r", 5 ) )
 320         {
 321 #ifdef HAVE_HAL_1
 322             /* hal 0.2.9.7 (HAVE_HAL) has not is_videodvd
 323              * but hal 0.5.0 (HAVE_HAL_1) has */
 324             if (libhal_device_get_property_bool( p_sys->p_ctx, psz_device,
 325                                          "volume.disc.is_videodvd", NULL ) )
 326 #endif
 327             AddDvd( p_sd, psz_device );
 328         }
 329         else if( !strncmp( psz_disc_type, "cd_r", 4 ) )
 330         {
 331 #ifdef HAVE_HAL_1
 332             if( libhal_device_get_property_bool( p_sys->p_ctx, psz_device,
 333                                          "volume.disc.has_audio" , NULL ) )
 334 #else
 335             if( hal_device_get_property_bool( p_sys->p_ctx, psz_device,
 336                                          "volume.disc.has_audio" ) )
 337 #endif
 338             {
 339                 AddCdda( p_sd, psz_device );
 340             }
 341         }
 342     }
 343 }
 344
 345 /*****************************************************************************
 346  * Run: main HAL thread
 347  *****************************************************************************/
 348 static void Run( services_discovery_t *p_sd )
 349 {
 350     int i, i_devices;
 351     char **devices;
 352     services_discovery_sys_t    *p_sys  = p_sd->p_sys;
 353
 354     /* parse existing devices first */
 355 #ifdef HAVE_HAL_1
 356     if( ( devices = libhal_get_all_devices( p_sys->p_ctx, &i_devices, NULL ) ) )
 357 #else
 358     if( ( devices = hal_get_all_devices( p_sys->p_ctx, &i_devices ) ) )
 359 #endif
 360     {
 361         for( i = 0; i < i_devices; i++ )
 362         {
 363             ParseDevice( p_sd, devices[ i ] );
 364 #ifdef HAVE_HAL_1
 365             libhal_free_string( devices[ i ] );
 366 #else
 367             hal_free_string( devices[ i ] );
 368 #endif
 369
 370         }
 371     }
 372 #ifdef HAVE_HAL_1
 373     while( !p_sd->b_die )
 374     {
 375     /* look for events on the bus, blocking 1 second */
 376     dbus_connection_read_write_dispatch( p_sys->p_connection, 1000 );
 377     /* HAL 0.5.8.1 can use libhal_ctx_get_dbus_connection(p_sys->p_ctx) */
 378     }
 379 #endif
 380
 381 }
 382
 383 #ifdef HAVE_HAL_1
 384 void DeviceAdded( LibHalContext *p_ctx, const char *psz_udi )
 385 {
 386     VLC_UNUSED(p_ctx);
 387     ParseDevice( p_sd_global, psz_udi );
 388 }
 389 void DeviceRemoved( LibHalContext *p_ctx, const char *psz_udi )
 390 {
 391     VLC_UNUSED(p_ctx);
 392     DelItem( p_sd_global, psz_udi );
 393 }
 394 #endif
 395