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vlc/lib/media_discoverer.c

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/*****************************************************************************
* media_discoverer.c: libvlc new API media discoverer functions
*****************************************************************************
* Copyright (C) 2007 VLC authors and VideoLAN
* $Id$
*
* Authors: Pierre d'Herbemont <pdherbemont # videolan.org>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this program; if not, write to the Free Software Foundation,
* Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
*****************************************************************************/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <assert.h>
#include <vlc/libvlc.h>
#include <vlc/libvlc_media.h>
#include <vlc/libvlc_media_list.h>
#include <vlc/libvlc_media_discoverer.h>
#include <vlc/libvlc_events.h>
#include <vlc_services_discovery.h>
#include "libvlc_internal.h"
#include "media_internal.h" // libvlc_media_new_from_input_item()
#include "media_list_internal.h" // _libvlc_media_list_add_media()
struct libvlc_media_discoverer_t
{
libvlc_event_manager_t * p_event_manager;
libvlc_instance_t * p_libvlc_instance;
services_discovery_t * p_sd;
libvlc_media_list_t * p_mlist;
bool running;
vlc_dictionary_t catname_to_submedialist;
};
/*
* Private functions
*/
/**************************************************************************
* services_discovery_item_added (Private) (VLC event callback)
**************************************************************************/
static void services_discovery_item_added( const vlc_event_t * p_event,
void * user_data )
{
input_item_t * p_item = p_event->u.services_discovery_item_added.p_new_item;
const char * psz_cat = p_event->u.services_discovery_item_added.psz_category;
libvlc_media_t * p_md;
libvlc_media_discoverer_t * p_mdis = user_data;
libvlc_media_list_t * p_mlist = p_mdis->p_mlist;
p_md = libvlc_media_new_from_input_item( p_mdis->p_libvlc_instance,
p_item );
/* If we have a category, that mean we have to group the items having
* that category in a media_list. */
if( psz_cat )
{
p_mlist = vlc_dictionary_value_for_key( &p_mdis->catname_to_submedialist, psz_cat );
if( p_mlist == kVLCDictionaryNotFound )
{
libvlc_media_t * p_catmd;
p_catmd = libvlc_media_new_as_node( p_mdis->p_libvlc_instance, psz_cat );
p_mlist = libvlc_media_subitems( p_catmd );
p_mlist->b_read_only = true;
/* Insert the newly created mlist in our dictionary */
vlc_dictionary_insert( &p_mdis->catname_to_submedialist, psz_cat, p_mlist );
/* Insert the md into the root list */
libvlc_media_list_lock( p_mdis->p_mlist );
_libvlc_media_list_add_media( p_mdis->p_mlist, p_catmd );
libvlc_media_list_unlock( p_mdis->p_mlist );
/* We don't release the mlist cause the dictionary
* doesn't retain the object. But we release the md. */
libvlc_media_release( p_catmd );
}
}
libvlc_media_list_lock( p_mlist );
_libvlc_media_list_add_media( p_mlist, p_md );
libvlc_media_list_unlock( p_mlist );
libvlc_media_release( p_md );
}
/**************************************************************************
* services_discovery_item_removed (Private) (VLC event callback)
**************************************************************************/
static void services_discovery_item_removed( const vlc_event_t * p_event,
void * user_data )
{
input_item_t * p_item = p_event->u.services_discovery_item_added.p_new_item;
libvlc_media_t * p_md;
libvlc_media_discoverer_t * p_mdis = user_data;
int i, count = libvlc_media_list_count( p_mdis->p_mlist );
libvlc_media_list_lock( p_mdis->p_mlist );
for( i = 0; i < count; i++ )
{
p_md = libvlc_media_list_item_at_index( p_mdis->p_mlist, i );
if( p_md->p_input_item == p_item )
{
_libvlc_media_list_remove_index( p_mdis->p_mlist, i );
break;
}
}
libvlc_media_list_unlock( p_mdis->p_mlist );
}
/**************************************************************************
* services_discovery_started (Private) (VLC event callback)
**************************************************************************/
static void services_discovery_started( const vlc_event_t * p_event,
void * user_data )
{
VLC_UNUSED(p_event);
libvlc_media_discoverer_t * p_mdis = user_data;
libvlc_event_t event;
p_mdis->running = true;
event.type = libvlc_MediaDiscovererStarted;
libvlc_event_send( p_mdis->p_event_manager, &event );
}
/**************************************************************************
* services_discovery_ended (Private) (VLC event callback)
**************************************************************************/
static void services_discovery_ended( const vlc_event_t * p_event,
void * user_data )
{
VLC_UNUSED(p_event);
libvlc_media_discoverer_t * p_mdis = user_data;
libvlc_event_t event;
p_mdis->running = false;
event.type = libvlc_MediaDiscovererEnded;
libvlc_event_send( p_mdis->p_event_manager, &event );
}
/*
* Public libvlc functions
*/
/**************************************************************************
* new (Public)
*
* Init an object.
**************************************************************************/
libvlc_media_discoverer_t *
libvlc_media_discoverer_new_from_name( libvlc_instance_t * p_inst,
const char * psz_name )
{
libvlc_media_discoverer_t * p_mdis;
p_mdis = malloc(sizeof(libvlc_media_discoverer_t));
if( unlikely(!p_mdis) )
{
libvlc_printerr( "Not enough memory" );
return NULL;
}
p_mdis->p_libvlc_instance = p_inst;
p_mdis->p_mlist = libvlc_media_list_new( p_inst );
p_mdis->p_mlist->b_read_only = true;
p_mdis->running = false;
vlc_dictionary_init( &p_mdis->catname_to_submedialist, 0 );
p_mdis->p_event_manager = libvlc_event_manager_new( p_mdis, p_inst );
if( unlikely(p_mdis->p_event_manager == NULL) )
{
free( p_mdis );
return NULL;
}
libvlc_event_manager_register_event_type( p_mdis->p_event_manager,
libvlc_MediaDiscovererStarted );
libvlc_event_manager_register_event_type( p_mdis->p_event_manager,
libvlc_MediaDiscovererEnded );
p_mdis->p_sd = vlc_sd_Create( (vlc_object_t*)p_inst->p_libvlc_int,
psz_name );
if( unlikely(p_mdis->p_sd == NULL) )
{
libvlc_printerr( "%s: no such discovery module found", psz_name );
libvlc_media_list_release( p_mdis->p_mlist );
libvlc_event_manager_release( p_mdis->p_event_manager );
free( p_mdis );
return NULL;
}
vlc_event_attach( services_discovery_EventManager( p_mdis->p_sd ),
vlc_ServicesDiscoveryItemAdded,
services_discovery_item_added,
p_mdis );
vlc_event_attach( services_discovery_EventManager( p_mdis->p_sd ),
vlc_ServicesDiscoveryItemRemoved,
services_discovery_item_removed,
p_mdis );
vlc_event_attach( services_discovery_EventManager( p_mdis->p_sd ),
vlc_ServicesDiscoveryStarted,
services_discovery_started,
p_mdis );
vlc_event_attach( services_discovery_EventManager( p_mdis->p_sd ),
vlc_ServicesDiscoveryEnded,
services_discovery_ended,
p_mdis );
/* Here we go */
if( !vlc_sd_Start( p_mdis->p_sd ) )
{
libvlc_printerr( "%s: internal module error",
p_mdis->p_sd->psz_name );
libvlc_media_list_release( p_mdis->p_mlist );
libvlc_event_manager_release( p_mdis->p_event_manager );
free( p_mdis );
return NULL;
}
return p_mdis;
}
/**************************************************************************
* release (Public)
**************************************************************************/
void
libvlc_media_discoverer_release( libvlc_media_discoverer_t * p_mdis )
{
int i;
vlc_event_detach( services_discovery_EventManager( p_mdis->p_sd ),
vlc_ServicesDiscoveryItemAdded,
services_discovery_item_added,
p_mdis );
vlc_event_detach( services_discovery_EventManager( p_mdis->p_sd ),
vlc_ServicesDiscoveryItemRemoved,
services_discovery_item_removed,
p_mdis );
vlc_event_detach( services_discovery_EventManager( p_mdis->p_sd ),
vlc_ServicesDiscoveryStarted,
services_discovery_started,
p_mdis );
vlc_event_detach( services_discovery_EventManager( p_mdis->p_sd ),
vlc_ServicesDiscoveryEnded,
services_discovery_ended,
p_mdis );
libvlc_media_list_release( p_mdis->p_mlist );
vlc_sd_StopAndDestroy( p_mdis->p_sd );
/* Free catname_to_submedialist and all the mlist */
char ** all_keys = vlc_dictionary_all_keys( &p_mdis->catname_to_submedialist );
for( i = 0; all_keys[i]; i++ )
{
libvlc_media_list_t * p_catmlist = vlc_dictionary_value_for_key( &p_mdis->catname_to_submedialist, all_keys[i] );
libvlc_media_list_release( p_catmlist );
free( all_keys[i] );
}
free( all_keys );
vlc_dictionary_clear( &p_mdis->catname_to_submedialist, NULL, NULL );
libvlc_event_manager_release( p_mdis->p_event_manager );
free( p_mdis );
}
/**************************************************************************
* localized_name (Public)
**************************************************************************/
char *
libvlc_media_discoverer_localized_name( libvlc_media_discoverer_t * p_mdis )
{
return services_discovery_GetLocalizedName( p_mdis->p_sd );
}
/**************************************************************************
* media_list (Public)
**************************************************************************/
libvlc_media_list_t *
libvlc_media_discoverer_media_list( libvlc_media_discoverer_t * p_mdis )
{
libvlc_media_list_retain( p_mdis->p_mlist );
return p_mdis->p_mlist;
}
/**************************************************************************
* event_manager (Public)
**************************************************************************/
libvlc_event_manager_t *
libvlc_media_discoverer_event_manager( libvlc_media_discoverer_t * p_mdis )
{
return p_mdis->p_event_manager;
}
/**************************************************************************
* running (Public)
**************************************************************************/
int
libvlc_media_discoverer_is_running( libvlc_media_discoverer_t * p_mdis )
{
return p_mdis->running;
}
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