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  * $Id$
   6  *
   7  * Authors: Clément Stenac <zorglub@videolan.org>
   8  *
   9  * This program is free software; you can redistribute it and/or modify
  10  * it under the terms of the GNU General Public License as published by
  11  * the Free Software Foundation; either version 2 of the License, or
  12  * (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  22  *****************************************************************************/
  23
  24 #include <vlc/vlc.h>
  25 #include <vlc/intf.h>
  26
  27 #include <vlc/input.h>
  28
  29 #include "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 struct services_discovery_sys_t
  48 {
  49     LibHalContext *p_ctx;
  50     playlist_item_t *p_node_cat;
  51     playlist_item_t *p_node_one;
  52 };
  53 static void AddItem( services_discovery_t *p_sd, input_item_t * p_input );
  54 static void Run    ( services_discovery_t *p_intf );
  55
  56 static int  Open ( vlc_object_t * );
  57 static void Close( vlc_object_t * );
  58
  59 /*****************************************************************************
  60  * Module descriptor
  61  *****************************************************************************/
  62 vlc_module_begin();
  63     set_description( _("HAL devices detection") );
  64     set_category( CAT_PLAYLIST );
  65     set_subcategory( SUBCAT_PLAYLIST_SD );
  66
  67     set_capability( "services_discovery", 0 );
  68     set_callbacks( Open, Close );
  69
  70 vlc_module_end();
  71
  72
  73 /*****************************************************************************
  74  * Open: initialize and create stuff
  75  *****************************************************************************/
  76 static int Open( vlc_object_t *p_this )
  77 {
  78     services_discovery_t *p_sd = ( services_discovery_t* )p_this;
  79     services_discovery_sys_t *p_sys  = malloc(
  80                                     sizeof( services_discovery_sys_t ) );
  81
  82     playlist_t          *p_playlist;
  83
  84 #if defined( HAVE_HAL_1 ) && defined( HAVE_DBUS_2 )
  85     DBusError           dbus_error;
  86     DBusConnection      *p_connection;
  87 #endif
  88
  89     p_sd->pf_run = Run;
  90     p_sd->p_sys  = p_sys;
  91
  92 #if defined( HAVE_HAL_1 ) && defined( HAVE_DBUS_2 )
  93     dbus_error_init( &dbus_error );
  94
  95     p_sys->p_ctx = libhal_ctx_new();
  96     if( !p_sys->p_ctx )
  97     {
  98         msg_Err( p_sd, "unable to create HAL context") ;
  99         free( p_sys );
 100         return VLC_EGENERIC;
 101     }
 102     p_connection = dbus_bus_get( DBUS_BUS_SYSTEM, &dbus_error );
 103     if( dbus_error_is_set( &dbus_error ) )
 104     {
 105         msg_Err( p_sd, "unable to connect to DBUS: %s", dbus_error.message );
 106         dbus_error_free( &dbus_error );
 107         free( p_sys );
 108         return VLC_EGENERIC;
 109     }
 110     libhal_ctx_set_dbus_connection( p_sys->p_ctx, p_connection );
 111     if( !libhal_ctx_init( p_sys->p_ctx, &dbus_error ) )
 112 #else
 113     if( !(p_sys->p_ctx = hal_initialize( NULL, FALSE ) ) )
 114 #endif
 115     {
 116 #if defined( HAVE_HAL_1 ) && defined( HAVE_DBUS_2 )
 117         msg_Err( p_sd, "hal not available : %s", dbus_error.message );
 118         dbus_error_free( &dbus_error );
 119 #else
 120         msg_Err( p_sd, "hal not available" );
 121 #endif
 122         free( p_sys );
 123         return VLC_EGENERIC;
 124     }
 125
 126     /* Create our playlist node */
 127     p_playlist = (playlist_t *)vlc_object_find( p_sd, VLC_OBJECT_PLAYLIST,
 128                                                 FIND_ANYWHERE );
 129     if( !p_playlist )
 130     {
 131         msg_Warn( p_sd, "unable to find playlist, cancelling HAL listening");
 132         return VLC_EGENERIC;
 133     }
 134
 135     playlist_NodesPairCreate( p_playlist, _("Devices"),
 136                               &p_sys->p_node_cat, &p_sys->p_node_one,
 137                               VLC_TRUE );
 138     vlc_object_release( p_playlist );
 139
 140     return VLC_SUCCESS;
 141 }
 142
 143 /*****************************************************************************
 144  * Close:
 145  *****************************************************************************/
 146 static void Close( vlc_object_t *p_this )
 147 {
 148     services_discovery_t *p_sd = ( services_discovery_t* )p_this;
 149     services_discovery_sys_t *p_sys  = p_sd->p_sys;
 150     playlist_t *p_playlist =  (playlist_t *) vlc_object_find( p_sd,
 151                                  VLC_OBJECT_PLAYLIST, FIND_ANYWHERE );
 152     if( p_playlist )
 153     {
 154         playlist_NodeDelete( p_playlist, p_sys->p_node_cat, VLC_TRUE,VLC_TRUE );
 155         playlist_NodeDelete( p_playlist, p_sys->p_node_one, VLC_TRUE,VLC_TRUE );
 156         vlc_object_release( p_playlist );
 157     }
 158     free( p_sys );
 159 }
 160
 161 static void AddDvd( services_discovery_t *p_sd, char *psz_device )
 162 {
 163     char *psz_name;
 164     char *psz_uri;
 165     char *psz_blockdevice;
 166     input_item_t        *p_input;
 167 #ifdef HAVE_HAL_1
 168     psz_name = libhal_device_get_property_string( p_sd->p_sys->p_ctx,
 169                                         psz_device, "volume.label", NULL );
 170     psz_blockdevice = libhal_device_get_property_string( p_sd->p_sys->p_ctx,
 171                                         psz_device, "block.device", NULL );
 172 #else
 173     psz_name = hal_device_get_property_string( p_sd->p_sys->p_ctx,
 174                                                psz_device, "volume.label" );
 175     psz_blockdevice = hal_device_get_property_string( p_sd->p_sys->p_ctx,
 176                                                  psz_device, "block.device" );
 177 #endif
 178     asprintf( &psz_uri, "dvd://%s", psz_blockdevice );
 179     /* Create the playlist item here */
 180     p_input = input_ItemNew( p_sd, psz_uri, psz_name );
 181     free( psz_uri );
 182 #ifdef HAVE_HAL_1
 183     libhal_free_string( psz_device );
 184 #else
 185     hal_free_string( psz_device );
 186 #endif
 187     if( !p_input )
 188     {
 189         return;
 190     }
 191     AddItem( p_sd, p_input );
 192 }
 193
 194 static void AddItem( services_discovery_t *p_sd, input_item_t * p_input )
 195 {
 196     playlist_item_t *p_item;
 197     playlist_t *p_playlist = (playlist_t *)vlc_object_find( p_sd,
 198                                         VLC_OBJECT_PLAYLIST, FIND_ANYWHERE );
 199     if( !p_playlist )
 200     {
 201         msg_Err( p_sd, "playlist not found" );
 202         return;
 203     }
 204     p_item = playlist_NodeAddInput( p_playlist, p_input,p_sd->p_sys->p_node_cat,
 205                                     PLAYLIST_APPEND, PLAYLIST_END );
 206     p_item->i_flags &= ~PLAYLIST_SKIP_FLAG;
 207     p_item = playlist_NodeAddInput( p_playlist, p_input,p_sd->p_sys->p_node_one,
 208                                     PLAYLIST_APPEND, PLAYLIST_END );
 209     p_item->i_flags &= ~PLAYLIST_SKIP_FLAG;
 210
 211     vlc_object_release( p_playlist );
 212 }
 213
 214 static void AddCdda( services_discovery_t *p_sd, char *psz_device )
 215 {
 216     char *psz_name = "Audio CD";
 217     char *psz_uri;
 218     char *psz_blockdevice;
 219     input_item_t     *p_input;
 220 #ifdef HAVE_HAL_1
 221     psz_blockdevice = libhal_device_get_property_string( p_sd->p_sys->p_ctx,
 222                                             psz_device, "block.device", NULL );
 223 #else
 224     psz_blockdevice = hal_device_get_property_string( p_sd->p_sys->p_ctx,
 225                                                  psz_device, "block.device" );
 226 #endif
 227     asprintf( &psz_uri, "cdda://%s", psz_blockdevice );
 228     /* Create the playlist item here */
 229     p_input = input_ItemNew( p_sd, psz_uri, psz_name );
 230     free( psz_uri );
 231 #ifdef HAVE_HAL_1
 232     libhal_free_string( psz_device );
 233 #else
 234     hal_free_string( psz_device );
 235 #endif
 236     if( !p_input )
 237         return;
 238     AddItem( p_sd, p_input );
 239 }
 240
 241 static void ParseDevice( services_discovery_t *p_sd, char *psz_device )
 242 {
 243     char *psz_disc_type;
 244     services_discovery_sys_t    *p_sys  = p_sd->p_sys;
 245 #ifdef HAVE_HAL_1
 246     if( libhal_device_property_exists( p_sys->p_ctx, psz_device,
 247                                        "volume.disc.type", NULL ) )
 248     {
 249         psz_disc_type = libhal_device_get_property_string( p_sys->p_ctx,
 250                                                         psz_device,
 251                                                         "volume.disc.type",
 252                                                         NULL );
 253 #else
 254     if( hal_device_property_exists( p_sys->p_ctx, psz_device,
 255                                     "volume.disc.type" ) )
 256     {
 257         psz_disc_type = hal_device_get_property_string( p_sys->p_ctx,
 258                                                         psz_device,
 259                                                         "volume.disc.type" );
 260 #endif
 261         if( !strcmp( psz_disc_type, "dvd_rom" ) )
 262         {
 263 #ifdef HAVE_HAL_1
 264             /* hal 0.2.9.7 (HAVE_HAL) has not is_videodvd
 265              * but hal 0.5.0 (HAVE_HAL_1) has */
 266             if (libhal_device_get_property_bool( p_sys->p_ctx, psz_device,
 267                                          "volume.disc.is_videodvd", NULL ) )
 268 #endif
 269             AddDvd( p_sd, psz_device );
 270         }
 271         else if( !strcmp( psz_disc_type, "cd_rom" ) )
 272         {
 273 #ifdef HAVE_HAL_1
 274             if( libhal_device_get_property_bool( p_sys->p_ctx, psz_device,
 275                                          "volume.disc.has_audio" , NULL ) )
 276 #else
 277             if( hal_device_get_property_bool( p_sys->p_ctx, psz_device,
 278                                          "volume.disc.has_audio" ) )
 279 #endif
 280             {
 281                 AddCdda( p_sd, psz_device );
 282             }
 283         }
 284 #ifdef HAVE_HAL_1
 285         libhal_free_string( psz_disc_type );
 286 #else
 287         hal_free_string( psz_disc_type );
 288 #endif
 289     }
 290 }
 291
 292 /*****************************************************************************
 293  * Run: main HAL thread
 294  *****************************************************************************/
 295 static void Run( services_discovery_t *p_sd )
 296 {
 297     int i, i_devices;
 298     char **devices;
 299     services_discovery_sys_t    *p_sys  = p_sd->p_sys;
 300
 301     /* parse existing devices first */
 302 #ifdef HAVE_HAL_1
 303     if( ( devices = libhal_get_all_devices( p_sys->p_ctx, &i_devices, NULL ) ) )
 304 #else
 305     if( ( devices = hal_get_all_devices( p_sys->p_ctx, &i_devices ) ) )
 306 #endif
 307     {
 308         for( i = 0; i < i_devices; i++ )
 309         {
 310             ParseDevice( p_sd, devices[ i ] );
 311         }
 312     }
 313 #ifdef HAVE_DBUS_2
 314     /* We'll use D-Bus to listen for devices evenements */
 315     /* TODO: Manage hot removal of devices */
 316     DBusMessage*        dbus_message;
 317     DBusMessageIter     dbus_args;
 318     const char**        psz_dbus_value;
 319     char*               psz_dbus_device;
 320     DBusError           dbus_error;
 321     DBusConnection*     p_connection;
 322
 323     dbus_error_init( &dbus_error );
 324
 325     /* connect to the system bus */
 326     p_connection = dbus_bus_get( DBUS_BUS_SYSTEM, &dbus_error );
 327     if ( dbus_error_is_set( &dbus_error ) )
 328     {
 329         msg_Err( p_sd, "D-Bus Connection Error (%s)\n", dbus_error.message);
 330         dbus_error_free( &dbus_error );
 331         return;
 332     }
 333
 334     /* check for hal signals */
 335     dbus_bus_add_match( p_connection,
 336         "type='signal',interface='org.freedesktop.Hal.Manager'", &dbus_error );
 337     dbus_connection_flush( p_connection );
 338
 339     /* an error ? oooh too bad :) */
 340     if ( dbus_error_is_set( &dbus_error ) )
 341     {
 342         msg_Err( p_sd, "D-Bus signal match Error (%s)\n", dbus_error.message);
 343         return;
 344     }
 345
 346     while( !p_sd->b_die )
 347     {
 348         /* read next available message */
 349         dbus_connection_read_write( p_connection, 0 );
 350         dbus_message = dbus_connection_pop_message( p_connection );
 351
 352         if( dbus_message == NULL )
 353         {
 354             /* we've worked really hard, now it's time to sleep */
 355             msleep( 100000 );
 356             continue;
 357         }
 358         /* check if the message is a signal from the correct interface */
 359         if( dbus_message_is_signal( dbus_message, "org.freedesktop.Hal.Manager",
 360                     "DeviceAdded" ) )
 361         {
 362             /* read the parameter (it must be an udi string) */
 363             if( dbus_message_iter_init( dbus_message, &dbus_args ) &&
 364                 ( dbus_message_iter_get_arg_type( &dbus_args ) ==
 365                         DBUS_TYPE_STRING )
 366                 )
 367             {
 368                 dbus_message_iter_get_basic( &dbus_args, &psz_dbus_value );
 369                 /* psz_bus_value musn't be freed, but AddCdda will do it
 370                  * so we allocate some memory, and copy it into psz_dbus_device
 371                  */
 372                 psz_dbus_device = strdup( psz_dbus_value );
 373                 ParseDevice( p_sd, psz_dbus_device );
 374             }
 375         }
 376         dbus_message_unref( dbus_message );
 377     }
 378 #endif
 379 }