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_common.h>
  31 #include <vlc_plugin.h>
  32 #include <vlc_playlist.h>
  33
  34 #include <vlc_network.h>
  35
  36 #include <errno.h>                                                 /* ENOMEM */
  37
  38 #ifdef HAVE_UNISTD_H
  39 #    include <unistd.h>
  40 #endif
  41 #ifdef HAVE_SYS_TIME_H
  42 #    include <sys/time.h>
  43 #endif
  44
  45 #include <hal/libhal.h>
  46
  47 #define MAX_LINE_LENGTH 256
  48
  49 /*****************************************************************************
  50  * Local prototypes
  51  *****************************************************************************/
  52
  53 /* store relation between item id and udi for ejection */
  54 struct udi_input_id_t
  55 {
  56     char            *psz_udi;
  57     input_item_t    *p_item;
  58 };
  59
  60 struct services_discovery_sys_t
  61 {
  62     LibHalContext           *p_ctx;
  63     DBusConnection          *p_connection;
  64     int                     i_devices_number;
  65     struct udi_input_id_t   **pp_devices;
  66 };
  67 static void Run    ( services_discovery_t *p_intf );
  68
  69 static int  Open ( vlc_object_t * );
  70 static void Close( vlc_object_t * );
  71
  72 /* HAL callbacks */
  73 void DeviceAdded( LibHalContext *p_ctx, const char *psz_udi );
  74 void DeviceRemoved( LibHalContext *p_ctx, const char *psz_udi );
  75
  76 /* to retrieve p_sd in HAL callbacks */
  77 services_discovery_t        *p_sd_global;
  78
  79 /*****************************************************************************
  80  * Module descriptor
  81  *****************************************************************************/
  82 vlc_module_begin();
  83     set_description( N_("HAL devices detection") );
  84     set_category( CAT_PLAYLIST );
  85     set_subcategory( SUBCAT_PLAYLIST_SD );
  86
  87     set_capability( "services_discovery", 0 );
  88     set_callbacks( Open, Close );
  89
  90 vlc_module_end();
  91
  92
  93 /*****************************************************************************
  94  * Open: initialize and create stuff
  95  *****************************************************************************/
  96 static int Open( vlc_object_t *p_this )
  97 {
  98     services_discovery_t *p_sd = ( services_discovery_t* )p_this;
  99     services_discovery_sys_t *p_sys  = malloc(
 100                                     sizeof( services_discovery_sys_t ) );
 101     if( !p_sys )
 102         return VLC_ENOMEM;
 103
 104     DBusError           dbus_error;
 105     DBusConnection      *p_connection;
 106
 107     p_sd_global = p_sd;
 108     p_sys->i_devices_number = 0;
 109     p_sys->pp_devices = NULL;
 110
 111     p_sd->pf_run = Run;
 112     p_sd->p_sys  = p_sys;
 113
 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     {
 135         msg_Err( p_sd, "hal not available : %s", dbus_error.message );
 136         dbus_error_free( &dbus_error );
 137         free( p_sys );
 138         return VLC_EGENERIC;
 139     }
 140
 141     if( !libhal_ctx_set_device_added( p_sys->p_ctx, DeviceAdded ) ||
 142             !libhal_ctx_set_device_removed( p_sys->p_ctx, DeviceRemoved ) )
 143     {
 144         msg_Err( p_sd, "unable to add callback" );
 145         dbus_error_free( &dbus_error );
 146         free( p_sys );
 147         return VLC_EGENERIC;
 148     }
 149
 150     services_discovery_SetLocalizedName( p_sd, _("Devices") );
 151
 152     return VLC_SUCCESS;
 153 }
 154
 155 /*****************************************************************************
 156  * Close:
 157  *****************************************************************************/
 158 static void Close( vlc_object_t *p_this )
 159 {
 160     services_discovery_t *p_sd = ( services_discovery_t* )p_this;
 161     services_discovery_sys_t *p_sys  = p_sd->p_sys;
 162
 163     dbus_connection_unref( p_sys->p_connection );
 164     struct udi_input_id_t *p_udi_entry;
 165
 166     while( p_sys->i_devices_number > 0 )
 167     {
 168         p_udi_entry = p_sys->pp_devices[0];
 169         free( p_udi_entry->psz_udi );
 170         TAB_REMOVE( p_sys->i_devices_number, p_sys->pp_devices,
 171                 p_sys->pp_devices[0] );
 172         free( p_udi_entry );
 173     }
 174     p_sys->pp_devices = NULL;
 175
 176     free( p_sys );
 177 }
 178
 179 static void AddItem( services_discovery_t *p_sd, input_item_t * p_input,
 180                     const char* psz_device )
 181 {
 182     services_discovery_sys_t *p_sys  = p_sd->p_sys;
 183     services_discovery_AddItem( p_sd, p_input, NULL /* no category */ );
 184
 185     struct udi_input_id_t *p_udi_entry;
 186     p_udi_entry = malloc( sizeof( struct udi_input_id_t ) );
 187     if( !p_udi_entry )
 188         return;
 189     p_udi_entry->psz_udi = strdup( psz_device );
 190     if( !p_udi_entry->psz_udi )
 191     {
 192         free( p_udi_entry );
 193         return;
 194     }
 195
 196     vlc_gc_incref( p_input );
 197     p_udi_entry->p_item = p_input;
 198     TAB_APPEND( p_sys->i_devices_number, p_sys->pp_devices, p_udi_entry );
 199 }
 200
 201 static void AddDvd( services_discovery_t *p_sd, const char *psz_device )
 202 {
 203     char *psz_name;
 204     char *psz_uri;
 205     char *psz_blockdevice;
 206     input_item_t        *p_input;
 207
 208     psz_name = libhal_device_get_property_string( p_sd->p_sys->p_ctx,
 209                                         psz_device, "volume.label", NULL );
 210     psz_blockdevice = libhal_device_get_property_string( p_sd->p_sys->p_ctx,
 211                                         psz_device, "block.device", NULL );
 212
 213     if( asprintf( &psz_uri, "dvd://%s", psz_blockdevice ) == -1 )
 214         return;
 215     /* Create the playlist item here */
 216     p_input = input_ItemNew( p_sd, psz_uri, psz_name );
 217     free( psz_uri );
 218     if( !p_input )
 219     {
 220         return;
 221     }
 222
 223     AddItem( p_sd, p_input, psz_device );
 224
 225     vlc_gc_decref( p_input );
 226 }
 227
 228 static void DelItem( services_discovery_t *p_sd, const char* psz_udi )
 229 {
 230     services_discovery_sys_t    *p_sys  = p_sd->p_sys;
 231
 232     int i;
 233     for( i = 0; i < p_sys->i_devices_number; i++ )
 234     { /*  looks for a matching udi */
 235         if( strcmp( psz_udi, p_sys->pp_devices[i]->psz_udi ) == 0 )
 236         { /* delete the corresponding item */
 237             services_discovery_RemoveItem( p_sd, p_sys->pp_devices[i]->p_item );
 238             vlc_gc_decref( p_sys->pp_devices[i]->p_item );
 239             free( p_sys->pp_devices[i]->psz_udi );
 240             TAB_REMOVE( p_sys->i_devices_number, p_sys->pp_devices,
 241                     p_sys->pp_devices[i] );
 242         }
 243     }
 244 }
 245
 246 static void AddCdda( services_discovery_t *p_sd, const char *psz_device )
 247 {
 248     char *psz_uri;
 249     char *psz_blockdevice;
 250     input_item_t     *p_input;
 251
 252     psz_blockdevice = libhal_device_get_property_string( p_sd->p_sys->p_ctx,
 253                                             psz_device, "block.device", NULL );
 254
 255     if( asprintf( &psz_uri, "cdda://%s", psz_blockdevice ) == -1 )
 256         return;
 257     /* Create the item here */
 258     p_input = input_ItemNew( p_sd, psz_uri, "Audio CD" );
 259     free( psz_uri );
 260     if( !p_input )
 261         return;
 262
 263     AddItem( p_sd, p_input, psz_device );
 264
 265     vlc_gc_decref( p_input );
 266 }
 267
 268 static void ParseDevice( services_discovery_t *p_sd, const char *psz_device )
 269 {
 270     char *psz_disc_type;
 271     services_discovery_sys_t    *p_sys  = p_sd->p_sys;
 272
 273     if( !libhal_device_property_exists( p_sys->p_ctx, psz_device,
 274                                        "volume.disc.type", NULL ) )
 275         return;
 276
 277     psz_disc_type = libhal_device_get_property_string( p_sys->p_ctx,
 278                                                     psz_device,
 279                                                     "volume.disc.type",
 280                                                     NULL );
 281     if( !strncmp( psz_disc_type, "dvd_r", 5 ) )
 282     {
 283         if (libhal_device_get_property_bool( p_sys->p_ctx, psz_device,
 284                                      "volume.disc.is_videodvd", NULL ) )
 285         AddDvd( p_sd, psz_device );
 286     }
 287     else if( !strncmp( psz_disc_type, "cd_r", 4 ) )
 288     {
 289         if( libhal_device_get_property_bool( p_sys->p_ctx, psz_device,
 290                                      "volume.disc.has_audio" , NULL ) )
 291             AddCdda( p_sd, psz_device );
 292     }
 293 }
 294
 295 /*****************************************************************************
 296  * Run: main HAL thread
 297  *****************************************************************************/
 298 static void Run( services_discovery_t *p_sd )
 299 {
 300     int i, i_devices;
 301     char **devices;
 302     services_discovery_sys_t    *p_sys  = p_sd->p_sys;
 303
 304     /* parse existing devices first */
 305     if( ( devices = libhal_get_all_devices( p_sys->p_ctx, &i_devices, NULL ) ) )
 306     {
 307         for( i = 0; i < i_devices; i++ )
 308         {
 309             ParseDevice( p_sd, devices[ i ] );
 310             libhal_free_string( devices[ i ] );
 311         }
 312     }
 313     while( vlc_object_alive (p_sd) )
 314     {
 315         /* look for events on the bus, blocking 1 second */
 316         dbus_connection_read_write_dispatch( p_sys->p_connection, 1000 );
 317         /* HAL 0.5.8.1 can use libhal_ctx_get_dbus_connection(p_sys->p_ctx) */
 318     }
 319 }
 320
 321 void DeviceAdded( LibHalContext *p_ctx, const char *psz_udi )
 322 {
 323     VLC_UNUSED(p_ctx);
 324     ParseDevice( p_sd_global, psz_udi );
 325 }
 326
 327 void DeviceRemoved( LibHalContext *p_ctx, const char *psz_udi )
 328 {
 329     VLC_UNUSED(p_ctx);
 330     DelItem( p_sd_global, psz_udi );
 331 }