git.sesse.net Git - vlc/blob - modules/misc/probe/hal.c

   1 /*****************************************************************************
   2  * hal.c :  HAL probing 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 #ifdef HAVE_CONFIG_H
  25 # include "config.h"
  26 #endif
  27
  28 #include <vlc/vlc.h>
  29 #include <vlc_interface.h>
  30 #include <vlc_devices.h>
  31
  32 #include <hal/libhal.h>
  33
  34 /*****************************************************************************
  35  * Local prototypes
  36  *****************************************************************************/
  37 struct probe_sys_t
  38 {
  39     DBusConnection *p_connection;
  40     LibHalContext *p_ctx;
  41     int            i_devices;
  42     device_t     **pp_devices;
  43 };
  44
  45 static int  Open ( vlc_object_t * );
  46 static void Close( vlc_object_t * );
  47
  48 static void Update ( device_probe_t *p_probe );
  49 static void UpdateMedia( device_probe_t *p_probe, device_t *p_dev );
  50 static void AddDevice( device_probe_t * p_probe, device_t *p_dev );
  51 static device_t * ParseDisc( device_probe_t *p_probe,  char *psz_device );
  52
  53 /*****************************************************************************
  54  * Module descriptor
  55  *****************************************************************************/
  56 vlc_module_begin();
  57     set_description( _("HAL devices detection") );
  58     set_capability( "devices probe", 0 );
  59     set_callbacks( Open, Close );
  60 vlc_module_end();
  61
  62
  63 /*****************************************************************************
  64  * Open: initialize and create stuff
  65  *****************************************************************************/
  66 static int Open( vlc_object_t *p_this )
  67 {
  68     device_probe_t *p_probe = (device_probe_t *)p_this;
  69     DBusError           dbus_error;
  70     DBusConnection      *p_connection;
  71     probe_sys_t          *p_sys;
  72
  73     p_probe->p_sys = p_sys = (probe_sys_t*)malloc( sizeof( probe_sys_t ) );
  74     p_probe->p_sys->i_devices = 0;
  75     p_probe->p_sys->pp_devices = NULL;
  76
  77     p_probe->pf_run = Update;
  78
  79     dbus_error_init( &dbus_error );
  80
  81     p_sys->p_ctx = libhal_ctx_new();
  82     if( !p_sys->p_ctx )
  83     {
  84         msg_Err( p_probe, "unable to create HAL context") ;
  85         free( p_probe->p_sys );
  86         return VLC_EGENERIC;
  87     }
  88     p_connection = dbus_bus_get( DBUS_BUS_SYSTEM, &dbus_error );
  89     if( dbus_error_is_set( &dbus_error ) )
  90     {
  91         msg_Err( p_probe, "unable to connect to DBUS: %s", dbus_error.message );
  92         dbus_error_free( &dbus_error );
  93         free( p_probe->p_sys );
  94         return VLC_EGENERIC;
  95     }
  96     p_sys->p_connection = p_connection;
  97     libhal_ctx_set_dbus_connection( p_probe->p_sys->p_ctx, p_connection );
  98     if( !libhal_ctx_init( p_probe->p_sys->p_ctx, &dbus_error ) )
  99     {
 100         msg_Err( p_probe, "hal not available : %s", dbus_error.message );
 101         dbus_connection_unref( p_connection );
 102         dbus_error_free( &dbus_error );
 103         free( p_sys );
 104         return VLC_EGENERIC;
 105     }
 106     return VLC_SUCCESS;
 107 }
 108
 109 /*****************************************************************************
 110  * Close:
 111  *****************************************************************************/
 112 static void Close( vlc_object_t *p_this )
 113 {
 114     device_probe_t *p_probe = (device_probe_t *) p_this;
 115     probe_sys_t *p_sys = p_probe->p_sys;
 116     dbus_connection_unref( p_sys->p_connection );
 117     free( p_sys );
 118 }
 119 #if 0
 120 static int GetAllDevices( device_probe_t *p_probe, device_t ***ppp_devices )
 121 {
 122     /// \todo : fill the dst array
 123     return p_probe->p_sys->i_devices;
 124 }
 125 #endif
 126 static void Update( device_probe_t * p_probe )
 127 {
 128     probe_sys_t *p_sys = p_probe->p_sys;
 129     int i, i_devices, j;
 130     char **devices;
 131     vlc_bool_t b_exists;
 132
 133     for ( j = 0 ; j < p_sys->i_devices; j++ )
 134         p_sys->pp_devices[j]->b_seen = VLC_FALSE;
 135
 136     /* CD/DVD */
 137     if( ( devices = libhal_find_device_by_capability( p_sys->p_ctx,
 138                               "storage.cdrom",
 139                               &i_devices, NULL ) ) )
 140     {
 141         for( i = 0; i < i_devices; i++ )
 142         {
 143             device_t *p_dev = ParseDisc( p_probe, devices[ i ] );
 144             b_exists = VLC_FALSE;
 145
 146             for ( j = 0 ; j < p_sys->i_devices; j++ )
 147             {
 148                 if( !strcmp( p_sys->pp_devices[j]->psz_uri,
 149                              p_dev->psz_uri ) )
 150                 {
 151                     b_exists = VLC_TRUE;
 152                     p_dev->b_seen = VLC_TRUE;
 153                     UpdateMedia( p_probe, p_dev );
 154                     break;
 155                 }
 156                 if( !b_exists )
 157                     AddDevice( p_probe, p_dev );
 158             }
 159         }
 160     }
 161     /// \todo Remove unseen devices
 162 }
 163
 164
 165 static void AddDevice( device_probe_t * p_probe, device_t *p_dev )
 166 {
 167     INSERT_ELEM( p_probe->p_sys->pp_devices,
 168                  p_probe->p_sys->i_devices,
 169                  p_probe->p_sys->i_devices,
 170                  p_dev );
 171     /// \todo : emit variable
 172 }
 173
 174 static device_t * ParseDisc( device_probe_t *p_probe,  char *psz_device )
 175 {
 176     probe_sys_t *p_sys = p_probe->p_sys;
 177     device_t *p_dev;
 178     char *block_dev;
 179     dbus_bool_t b_dvd;
 180
 181     if( !libhal_device_property_exists( p_sys->p_ctx, psz_device,
 182                                         "storage.cdrom.dvd", NULL ) )
 183         return NULL;
 184
 185     p_dev = (device_t *)malloc( sizeof( device_t ) );
 186     p_dev->i_media_type = p_dev->i_capabilities = 0;
 187     p_dev->psz_name = p_dev->psz_uri = NULL;
 188
 189     block_dev =  libhal_device_get_property_string( p_sys->p_ctx, psz_device,
 190                                                    "block.device" , NULL );
 191     if( block_dev )
 192     {
 193         p_dev->psz_uri = strdup( block_dev );
 194         libhal_free_string( block_dev );
 195     }
 196
 197     b_dvd = libhal_device_get_property_bool( p_sys->p_ctx, psz_device,
 198                                             "storage.cdrom.dvd", NULL  );
 199     if( b_dvd )
 200         p_dev->i_capabilities = DEVICE_CAN_DVD | DEVICE_CAN_CD;
 201     else
 202         p_dev->i_capabilities = DEVICE_CAN_CD;
 203
 204     UpdateMedia( p_probe, p_dev );
 205     return p_dev;
 206 }
 207
 208 static void UpdateMedia( device_probe_t *p_probe, device_t *p_dev )
 209 {
 210     probe_sys_t *p_sys = p_probe->p_sys;
 211     char **matching_media;
 212     int i_matching, i;
 213     vlc_bool_t b_changed = VLC_FALSE;;
 214     int i_old_type = p_dev->i_media_type;
 215     p_dev->i_media_type = 0;
 216
 217     /* Find the media in the drive */
 218     matching_media = libhal_manager_find_device_string_match( p_sys->p_ctx,
 219                                             "block.device", p_dev->psz_uri,
 220                                             &i_matching, NULL );
 221     for( i = 0; i < i_matching; i++ )
 222     {
 223         if( libhal_device_property_exists( p_sys->p_ctx, matching_media[i],
 224                                            "volume.disc.type", NULL ) )
 225         {
 226             char *psz_media_name = libhal_device_get_property_string(
 227                                             p_sys->p_ctx,
 228                                             matching_media[i],
 229                                             "volume.label", NULL );
 230             if( psz_media_name )
 231             {
 232                 if( p_dev->psz_name && strcmp( p_dev->psz_name, psz_media_name))
 233                 {
 234                     free( p_dev->psz_name );
 235                     p_dev->psz_name = NULL;
 236                     b_changed = VLC_TRUE;
 237                 }
 238                 if( !p_dev->psz_name )
 239                     p_dev->psz_name = strdup( psz_media_name );
 240                 libhal_free_string( psz_media_name );
 241             }
 242
 243             if( libhal_device_get_property_bool( p_sys->p_ctx,
 244                                              matching_media[i],
 245                                              "volume.disc.is_videodvd", NULL) )
 246                 p_dev->i_media_type = MEDIA_TYPE_DVD;
 247             else if( libhal_device_get_property_bool( p_sys->p_ctx,
 248                                              matching_media[i],
 249                                              "volume.disc.is_vcd", NULL) ||
 250                      libhal_device_get_property_bool( p_sys->p_ctx,
 251                                              matching_media[i],
 252                                              "volume.disc.is_svcd", NULL) )
 253                p_dev->i_media_type = MEDIA_TYPE_VCD;
 254             else if( libhal_device_get_property_bool( p_sys->p_ctx,
 255                                              matching_media[i],
 256                                              "volume.disc.has_audio", NULL) )
 257                p_dev->i_media_type = MEDIA_TYPE_CDDA;
 258
 259             break;
 260         }
 261     }
 262     if( b_changed || p_dev->i_media_type != i_old_type )
 263     {
 264         /// \todo emit changed signal
 265     }
 266 }