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     vlc_thread_t            thread;
  63     LibHalContext           *p_ctx;
  64     DBusConnection          *p_connection;
  65     int                     i_devices_number;
  66     struct udi_input_id_t   **pp_devices;
  67 };
  68 static void *Run ( void * );
  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->p_sys  = p_sys;
 112
 113     dbus_error_init( &dbus_error );
 114
 115     p_sys->p_ctx = libhal_ctx_new();
 116     if( !p_sys->p_ctx )
 117     {
 118         msg_Err( p_sd, "unable to create HAL context") ;
 119         free( p_sys );
 120         return VLC_EGENERIC;
 121     }
 122     p_connection = dbus_bus_get( DBUS_BUS_SYSTEM, &dbus_error );
 123     if( dbus_error_is_set( &dbus_error ) )
 124     {
 125         msg_Err( p_sd, "unable to connect to DBUS: %s", dbus_error.message );
 126         dbus_error_free( &dbus_error );
 127         free( p_sys );
 128         return VLC_EGENERIC;
 129     }
 130     libhal_ctx_set_dbus_connection( p_sys->p_ctx, p_connection );
 131     p_sys->p_connection = p_connection;
 132     if( !libhal_ctx_init( p_sys->p_ctx, &dbus_error ) )
 133     {
 134         msg_Err( p_sd, "hal not available : %s", dbus_error.message );
 135         goto error;
 136     }
 137
 138     if( !libhal_ctx_set_device_added( p_sys->p_ctx, DeviceAdded ) ||
 139             !libhal_ctx_set_device_removed( p_sys->p_ctx, DeviceRemoved ) )
 140     {
 141         msg_Err( p_sd, "unable to add callback" );
 142         goto error;
 143     }
 144
 145     if( vlc_clone( &p_sys->thread, Run, p_this, VLC_THREAD_PRIORITY_LOW ) )
 146         goto error;
 147
 148     services_discovery_SetLocalizedName( p_sd, _("Devices") );
 149
 150     return VLC_SUCCESS;
 151 error:
 152     dbus_error_free( &dbus_error );
 153     free( p_sys );
 154     return VLC_EGENERIC;
 155 }
 156
 157 /*****************************************************************************
 158  * Close:
 159  *****************************************************************************/
 160 static void Close( vlc_object_t *p_this )
 161 {
 162     services_discovery_t *p_sd = ( services_discovery_t* )p_this;
 163     services_discovery_sys_t *p_sys  = p_sd->p_sys;
 164
 165     /*vlc_cancel( p_sys->thread );*/
 166     vlc_object_kill( p_sd );
 167     vlc_join( p_sys->thread, NULL );
 168     dbus_connection_unref( p_sys->p_connection );
 169     struct udi_input_id_t *p_udi_entry;
 170
 171     while( p_sys->i_devices_number > 0 )
 172     {
 173         p_udi_entry = p_sys->pp_devices[0];
 174         free( p_udi_entry->psz_udi );
 175         TAB_REMOVE( p_sys->i_devices_number, p_sys->pp_devices,
 176                 p_sys->pp_devices[0] );
 177         free( p_udi_entry );
 178     }
 179     p_sys->pp_devices = NULL;
 180
 181     free( p_sys );
 182 }
 183
 184 static void AddItem( services_discovery_t *p_sd, input_item_t * p_input,
 185                     const char* psz_device )
 186 {
 187     services_discovery_sys_t *p_sys  = p_sd->p_sys;
 188     services_discovery_AddItem( p_sd, p_input, NULL /* no category */ );
 189
 190     struct udi_input_id_t *p_udi_entry;
 191     p_udi_entry = malloc( sizeof( struct udi_input_id_t ) );
 192     if( !p_udi_entry )
 193         return;
 194     p_udi_entry->psz_udi = strdup( psz_device );
 195     if( !p_udi_entry->psz_udi )
 196     {
 197         free( p_udi_entry );
 198         return;
 199     }
 200
 201     vlc_gc_incref( p_input );
 202     p_udi_entry->p_item = p_input;
 203     TAB_APPEND( p_sys->i_devices_number, p_sys->pp_devices, p_udi_entry );
 204 }
 205
 206 static void AddDvd( services_discovery_t *p_sd, const char *psz_device )
 207 {
 208     char *psz_name;
 209     char *psz_uri;
 210     char *psz_blockdevice;
 211     input_item_t        *p_input;
 212
 213     psz_name = libhal_device_get_property_string( p_sd->p_sys->p_ctx,
 214                                         psz_device, "volume.label", NULL );
 215     psz_blockdevice = libhal_device_get_property_string( p_sd->p_sys->p_ctx,
 216                                         psz_device, "block.device", NULL );
 217
 218     if( asprintf( &psz_uri, "dvd://%s", psz_blockdevice ) == -1 )
 219         return;
 220     /* Create the playlist item here */
 221     p_input = input_item_New( p_sd, psz_uri, psz_name );
 222     free( psz_uri );
 223     if( !p_input )
 224     {
 225         return;
 226     }
 227
 228     AddItem( p_sd, p_input, psz_device );
 229
 230     vlc_gc_decref( p_input );
 231 }
 232
 233 static void DelItem( services_discovery_t *p_sd, const char* psz_udi )
 234 {
 235     services_discovery_sys_t    *p_sys  = p_sd->p_sys;
 236
 237     int i;
 238     for( i = 0; i < p_sys->i_devices_number; i++ )
 239     { /*  looks for a matching udi */
 240         if( strcmp( psz_udi, p_sys->pp_devices[i]->psz_udi ) == 0 )
 241         { /* delete the corresponding item */
 242             services_discovery_RemoveItem( p_sd, p_sys->pp_devices[i]->p_item );
 243             vlc_gc_decref( p_sys->pp_devices[i]->p_item );
 244             free( p_sys->pp_devices[i]->psz_udi );
 245             TAB_REMOVE( p_sys->i_devices_number, p_sys->pp_devices,
 246                     p_sys->pp_devices[i] );
 247         }
 248     }
 249 }
 250
 251 static void AddCdda( services_discovery_t *p_sd, const char *psz_device )
 252 {
 253     char *psz_uri;
 254     char *psz_blockdevice;
 255     input_item_t     *p_input;
 256
 257     psz_blockdevice = libhal_device_get_property_string( p_sd->p_sys->p_ctx,
 258                                             psz_device, "block.device", NULL );
 259
 260     if( asprintf( &psz_uri, "cdda://%s", psz_blockdevice ) == -1 )
 261         return;
 262     /* Create the item here */
 263     p_input = input_item_New( p_sd, psz_uri, "Audio CD" );
 264     free( psz_uri );
 265     if( !p_input )
 266         return;
 267
 268     AddItem( p_sd, p_input, psz_device );
 269
 270     vlc_gc_decref( p_input );
 271 }
 272
 273 static void ParseDevice( services_discovery_t *p_sd, const char *psz_device )
 274 {
 275     char *psz_disc_type;
 276     services_discovery_sys_t    *p_sys  = p_sd->p_sys;
 277
 278     if( !libhal_device_property_exists( p_sys->p_ctx, psz_device,
 279                                        "volume.disc.type", NULL ) )
 280         return;
 281
 282     psz_disc_type = libhal_device_get_property_string( p_sys->p_ctx,
 283                                                     psz_device,
 284                                                     "volume.disc.type",
 285                                                     NULL );
 286     if( !strncmp( psz_disc_type, "dvd_r", 5 ) )
 287     {
 288         if (libhal_device_get_property_bool( p_sys->p_ctx, psz_device,
 289                                      "volume.disc.is_videodvd", NULL ) )
 290         AddDvd( p_sd, psz_device );
 291     }
 292     else if( !strncmp( psz_disc_type, "cd_r", 4 ) )
 293     {
 294         if( libhal_device_get_property_bool( p_sys->p_ctx, psz_device,
 295                                      "volume.disc.has_audio" , NULL ) )
 296             AddCdda( p_sd, psz_device );
 297     }
 298 }
 299
 300 /*****************************************************************************
 301  * Run: main HAL thread
 302  *****************************************************************************/
 303 static void *Run( void *data )
 304 {
 305     services_discovery_t     *p_sd  = data;
 306     services_discovery_sys_t *p_sys = p_sd->p_sys;
 307     char **devices;
 308     int i, i_devices;
 309     int canc = vlc_savecancel();
 310
 311     /* parse existing devices first */
 312     if( ( devices = libhal_get_all_devices( p_sys->p_ctx, &i_devices, NULL ) ) )
 313     {
 314         for( i = 0; i < i_devices; i++ )
 315         {
 316             ParseDevice( p_sd, devices[ i ] );
 317             libhal_free_string( devices[ i ] );
 318         }
 319     }
 320
 321     /* FIXME: Totally lame. There are DBus watch functions to do this properly.
 322      * -- Courmisch, 28/08/2008 */
 323     while( vlc_object_alive (p_sd) )
 324     {
 325         /* look for events on the bus, blocking 1 second */
 326         dbus_connection_read_write_dispatch( p_sys->p_connection, 1000 );
 327         /* HAL 0.5.8.1 can use libhal_ctx_get_dbus_connection(p_sys->p_ctx) */
 328     }
 329     vlc_restorecancel (canc);
 330     return NULL;
 331 }
 332
 333 void DeviceAdded( LibHalContext *p_ctx, const char *psz_udi )
 334 {
 335     VLC_UNUSED(p_ctx);
 336     ParseDevice( p_sd_global, psz_udi );
 337 }
 338
 339 void DeviceRemoved( LibHalContext *p_ctx, const char *psz_udi )
 340 {
 341     VLC_UNUSED(p_ctx);
 342     DelItem( p_sd_global, psz_udi );
 343 }