/***************************************************************************** * flat_media_list.c: libvlc flat media list functions. (extension to * media_list.c). ***************************************************************************** * Copyright (C) 2007 the VideoLAN team * $Id: flat_media_list.c 21287 2007-08-20 01:28:12Z pdherbemont $ * * 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 General Public License as published by * the Free Software Foundation; either version 2 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 General Public License for more details. * * You should have received a copy of the GNU 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. *****************************************************************************/ #include "libvlc_internal.h" #include <vlc/libvlc.h> #include <assert.h> #include "vlc_arrays.h" //#define DEBUG_FLAT_LIST #ifdef DEBUG_FLAT_LIST # define trace( fmt, ... ) printf( "%s(): " fmt, __FUNCTION__, ##__VA_ARGS__ ) #else # define trace( ... ) #endif /* * Private functions */ static void media_list_item_removed( const libvlc_event_t * p_event, void * p_user_data ); static void media_list_item_added( const libvlc_event_t * p_event, void * p_user_data ) { libvlc_media_list_view_t * p_mlv = p_user_data; libvlc_media_descriptor_t * p_md = p_event->u.media_list_item_added.item; libvlc_media_list_t * p_mlist; if((p_mlist = libvlc_media_descriptor_subitems( p_md, NULL ))) { libvlc_event_attach( p_mlist->p_event_manager, libvlc_MediaListItemAdded, media_list_item_added, p_mlv, NULL ); libvlc_event_attach( p_mlist->p_event_manager, libvlc_MediaListItemDeleted, media_list_item_removed, p_mlv, NULL ); } if( p_mlv->pf_ml_item_added ) p_mlv->pf_ml_item_added( p_event, p_user_data ); } static void media_list_item_removed( const libvlc_event_t * p_event, void * p_user_data ) { libvlc_media_list_view_t * p_mlv = p_user_data; libvlc_media_descriptor_t * p_md = p_event->u.media_list_item_added.item; libvlc_media_list_t * p_mlist; if((p_mlist = libvlc_media_descriptor_subitems( p_md, NULL ))) { libvlc_event_attach( p_mlist->p_event_manager, libvlc_MediaListItemAdded, media_list_item_added, p_mlv, NULL ); libvlc_event_attach( p_mlist->p_event_manager, libvlc_MediaListItemDeleted, media_list_item_removed, p_mlv, NULL ); } if( p_mlv->pf_ml_item_removed ) p_mlv->pf_ml_item_removed( p_event, p_user_data ); } /* * LibVLC Internal functions */ void libvlc_media_list_view_set_ml_notification_callback( libvlc_media_list_view_t * p_mlv, void (*item_added)(const libvlc_event_t *, void *), void (*item_removed)(const libvlc_event_t *, void *) ) { p_mlv->pf_ml_item_added = item_added; p_mlv->pf_ml_item_removed = item_removed; libvlc_event_attach( p_mlv->p_mlist->p_event_manager, libvlc_MediaListItemAdded, media_list_item_added, p_mlv, NULL ); libvlc_event_attach( p_mlv->p_mlist->p_event_manager, libvlc_MediaListItemDeleted, media_list_item_removed, p_mlv, NULL ); } /************************************************************************** * libvlc_media_list_view_new (Internal) **************************************************************************/ libvlc_media_list_view_t * libvlc_media_list_view_new( libvlc_media_list_t * p_mlist, libvlc_media_list_view_count_func_t pf_count, libvlc_media_list_view_item_at_index_func_t pf_item_at_index, libvlc_media_list_view_children_at_index_func_t pf_children_at_index, libvlc_media_list_view_release_func_t pf_release, void * this_view_data, libvlc_exception_t * p_e ) { libvlc_media_list_view_t * p_mlv; p_mlv = calloc( 1, sizeof(libvlc_media_list_view_t) ); if( !p_mlv ) return NULL; p_mlv->p_libvlc_instance = p_mlist->p_libvlc_instance; p_mlv->p_event_manager = libvlc_event_manager_new( p_mlist, p_mlv->p_libvlc_instance, p_e ); libvlc_media_list_retain( p_mlist ); p_mlv->p_mlist = p_mlist; p_mlv->pf_count = pf_count; p_mlv->pf_item_at_index = pf_item_at_index; p_mlv->pf_children_at_index = pf_children_at_index; p_mlv->pf_release = pf_release; p_mlv->p_this_view_data = this_view_data; vlc_mutex_init( p_mlv->p_libvlc_instance->p_libvlc_int, &p_mlv->object_lock ); p_mlv->i_refcount = 1; return p_mlv; } /* * Public libvlc functions */ /************************************************************************** * libvlc_media_list_view_retain (Public) **************************************************************************/ void libvlc_media_list_view_retain( libvlc_media_list_view_t * p_mlv ) { vlc_mutex_lock( &p_mlv->object_lock ); p_mlv->i_refcount++; vlc_mutex_unlock( &p_mlv->object_lock ); } /************************************************************************** * libvlc_media_list_view_release (Public) **************************************************************************/ void libvlc_media_list_view_release( libvlc_media_list_view_t * p_mlv ) { vlc_mutex_lock( &p_mlv->object_lock ); p_mlv->i_refcount--; if( p_mlv->i_refcount > 0 ) { vlc_mutex_unlock( &p_mlv->object_lock ); return; } vlc_mutex_unlock( &p_mlv->object_lock ); /* Refcount null, time to free */ if( p_mlv->pf_ml_item_added ) { libvlc_event_detach( p_mlv->p_mlist->p_event_manager, libvlc_MediaListItemAdded, p_mlv->pf_ml_item_added, p_mlv, NULL ); /* XXX: descend the whole tree and remove observer */ } if( p_mlv->pf_ml_item_removed ) { libvlc_event_detach( p_mlv->p_mlist->p_event_manager, libvlc_MediaListItemDeleted, p_mlv->pf_ml_item_removed, p_mlv, NULL ); /* XXX: descend the whole tree and remove observer */ } libvlc_event_manager_release( p_mlv->p_event_manager ); if( p_mlv->pf_release ) p_mlv->pf_release( p_mlv ); libvlc_media_list_release( p_mlv->p_mlist ); vlc_mutex_destroy( &p_mlv->object_lock ); } /* Limited to four args, because it should be enough */ #define AN_SELECT( collapser, dec1, dec2, dec3, dec4, p, ...) p #define ARGS(...) AN_SELECT( collapser, ##__VA_ARGS__, \ (p_mlv, arg1, arg2, arg3, arg4, p_e), \ (p_mlv, arg1, arg2, arg3, p_e), \ (p_mlv, arg1, arg2, p_e), \ (p_mlv, arg1, p_e), (p_mlv, p_e) ) #define MEDIA_LIST_VIEW_FUNCTION( name, ret_type, default_ret_value, /* Params */ ... ) \ ret_type \ libvlc_media_list_view_##name( libvlc_media_list_view_t * p_mlv, \ ##__VA_ARGS__, \ libvlc_exception_t * p_e ) \ { \ if( p_mlv->pf_##name ) \ return p_mlv->pf_##name ARGS(__VA_ARGS__) ; \ libvlc_exception_raise( p_e, "No '" #name "' method in this media_list_view" ); \ return default_ret_value;\ } #define MEDIA_LIST_VIEW_FUNCTION_VOID_RET( name, /* Params */ ... ) \ void \ libvlc_media_list_view_##name( libvlc_media_list_view_t * p_mlv, \ ##__VA_ARGS__, \ libvlc_exception_t * p_e ) \ { \ if( p_mlv->pf_##name ) \ { \ p_mlv->pf_##name ARGS(__VA_ARGS__) ; \ return; \ } \ libvlc_exception_raise( p_e, "No '" #name "' method in this media_list_view" ); \ } MEDIA_LIST_VIEW_FUNCTION( count, int, 0 ) MEDIA_LIST_VIEW_FUNCTION( item_at_index, libvlc_media_descriptor_t *, NULL, int arg1 ) MEDIA_LIST_VIEW_FUNCTION( children_at_index, libvlc_media_list_view_t *, NULL, int arg1 )