mirror of
https://code.videolan.org/videolan/vlc
synced 2024-09-08 11:26:59 +02:00
502 lines
16 KiB
C
502 lines
16 KiB
C
/*****************************************************************************
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* media_list.c: libvlc new API media list functions
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*****************************************************************************
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* Copyright (C) 2007 VLC authors and VideoLAN
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* $Id$
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*
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* Authors: Pierre d'Herbemont <pdherbemont # videolan.org>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU Lesser General Public License as published by
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* the Free Software Foundation; either version 2.1 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public License
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* along with this program; if not, write to the Free Software Foundation,
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* Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
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*****************************************************************************/
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#ifdef HAVE_CONFIG_H
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# include "config.h"
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#endif
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#include <assert.h>
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#include <vlc/libvlc.h>
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#include <vlc/libvlc_media.h>
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#include <vlc/libvlc_media_list.h>
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#include <vlc/libvlc_events.h>
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#include <vlc_common.h>
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#include <vlc_input.h>
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#include "libvlc_internal.h"
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#include "media_internal.h" // libvlc_media_new_from_input_item()
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#include "media_list_internal.h"
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typedef enum EventPlaceInTime {
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EventWillHappen,
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EventDidHappen
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} EventPlaceInTime;
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//#define DEBUG_MEDIA_LIST
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#ifdef DEBUG_MEDIA_LIST
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# define trace( fmt, ... ) printf( "%s(): " fmt, __FUNCTION__, ##__VA_ARGS__ )
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#else
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# define trace( ... )
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#endif
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/*
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* Private functions
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*/
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/**************************************************************************
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* notify_item_addition (private)
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*
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* Do the appropriate action when an item is deleted.
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**************************************************************************/
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static void
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notify_item_addition( libvlc_media_list_t * p_mlist,
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libvlc_media_t * p_md,
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int index,
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EventPlaceInTime event_status )
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{
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libvlc_event_t event;
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/* Construct the event */
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if( event_status == EventDidHappen )
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{
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trace("item was added at index %d\n", index);
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event.type = libvlc_MediaListItemAdded;
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event.u.media_list_item_added.item = p_md;
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event.u.media_list_item_added.index = index;
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}
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else /* if( event_status == EventWillHappen ) */
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{
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event.type = libvlc_MediaListWillAddItem;
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event.u.media_list_will_add_item.item = p_md;
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event.u.media_list_will_add_item.index = index;
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}
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/* Send the event */
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libvlc_event_send( p_mlist->p_event_manager, &event );
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}
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/**************************************************************************
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* notify_item_deletion (private)
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*
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* Do the appropriate action when an item is added.
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**************************************************************************/
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static void
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notify_item_deletion( libvlc_media_list_t * p_mlist,
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libvlc_media_t * p_md,
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int index,
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EventPlaceInTime event_status )
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{
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libvlc_event_t event;
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/* Construct the event */
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if( event_status == EventDidHappen )
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{
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trace("item at index %d was deleted\n", index);
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event.type = libvlc_MediaListItemDeleted;
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event.u.media_list_item_deleted.item = p_md;
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event.u.media_list_item_deleted.index = index;
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}
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else /* if( event_status == EventWillHappen ) */
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{
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event.type = libvlc_MediaListWillDeleteItem;
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event.u.media_list_will_delete_item.item = p_md;
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event.u.media_list_will_delete_item.index = index;
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}
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/* Send the event */
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libvlc_event_send( p_mlist->p_event_manager, &event );
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}
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/**************************************************************************
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* static mlist_is_writable (private)
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**************************************************************************/
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static inline
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bool mlist_is_writable( libvlc_media_list_t *p_mlist )
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{
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if( !p_mlist||p_mlist->b_read_only )
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{
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/* We are read-only from user side */
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libvlc_printerr( "Attempt to write a read-only media list" );
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return false;
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}
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return true;
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}
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/*
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* Public libvlc functions
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*/
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/**************************************************************************
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* libvlc_media_list_new (Public)
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*
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* Init an object.
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**************************************************************************/
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libvlc_media_list_t *
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libvlc_media_list_new( libvlc_instance_t * p_inst )
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{
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libvlc_media_list_t * p_mlist;
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p_mlist = malloc(sizeof(libvlc_media_list_t));
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if( unlikely(p_mlist == NULL) )
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{
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libvlc_printerr( "Not enough memory" );
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return NULL;
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}
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p_mlist->p_libvlc_instance = p_inst;
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p_mlist->p_event_manager = libvlc_event_manager_new( p_mlist, p_inst );
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if( unlikely(p_mlist->p_event_manager == NULL) )
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{
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free(p_mlist);
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return NULL;
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}
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p_mlist->b_read_only = false;
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libvlc_event_manager_register_event_type( p_mlist->p_event_manager,
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libvlc_MediaListItemAdded );
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libvlc_event_manager_register_event_type( p_mlist->p_event_manager,
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libvlc_MediaListWillAddItem );
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libvlc_event_manager_register_event_type( p_mlist->p_event_manager,
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libvlc_MediaListItemDeleted );
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libvlc_event_manager_register_event_type( p_mlist->p_event_manager,
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libvlc_MediaListWillDeleteItem );
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vlc_mutex_init( &p_mlist->object_lock );
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vlc_mutex_init( &p_mlist->refcount_lock ); // FIXME: spinlock?
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vlc_array_init( &p_mlist->items );
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assert( p_mlist->items.i_count == 0 );
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p_mlist->i_refcount = 1;
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p_mlist->p_md = NULL;
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return p_mlist;
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}
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/**************************************************************************
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* libvlc_media_list_release (Public)
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*
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* Release an object.
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**************************************************************************/
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void libvlc_media_list_release( libvlc_media_list_t * p_mlist )
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{
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libvlc_media_t * p_md;
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int i;
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vlc_mutex_lock( &p_mlist->refcount_lock );
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p_mlist->i_refcount--;
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if( p_mlist->i_refcount > 0 )
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{
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vlc_mutex_unlock( &p_mlist->refcount_lock );
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return;
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}
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vlc_mutex_unlock( &p_mlist->refcount_lock );
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/* Refcount null, time to free */
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libvlc_event_manager_release( p_mlist->p_event_manager );
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libvlc_media_release( p_mlist->p_md );
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for ( i = 0; i < vlc_array_count( &p_mlist->items ); i++ )
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{
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p_md = vlc_array_item_at_index( &p_mlist->items, i );
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libvlc_media_release( p_md );
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}
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vlc_mutex_destroy( &p_mlist->object_lock );
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vlc_array_clear( &p_mlist->items );
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free( p_mlist );
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}
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/**************************************************************************
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* libvlc_media_list_retain (Public)
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*
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* Increase an object refcount.
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**************************************************************************/
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void libvlc_media_list_retain( libvlc_media_list_t * p_mlist )
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{
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vlc_mutex_lock( &p_mlist->refcount_lock );
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p_mlist->i_refcount++;
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vlc_mutex_unlock( &p_mlist->refcount_lock );
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}
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/**************************************************************************
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* add_file_content (Public)
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**************************************************************************/
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int
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libvlc_media_list_add_file_content( libvlc_media_list_t * p_mlist,
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const char * psz_uri )
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{
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input_item_t * p_input_item;
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libvlc_media_t * p_md;
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p_input_item = input_item_NewExt( psz_uri,
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_("Media Library"), 0, NULL, 0, -1 );
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if( !p_input_item )
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{
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libvlc_printerr( "Not enough memory" );
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return -1;
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}
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p_md = libvlc_media_new_from_input_item( p_mlist->p_libvlc_instance,
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p_input_item );
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if( !p_md )
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{
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vlc_gc_decref( p_input_item );
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return -1;
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}
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if( libvlc_media_list_add_media( p_mlist, p_md ) )
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{
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#warning Missing error handling!
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/* printerr and leaks */
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return -1;
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}
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input_Read( p_mlist->p_libvlc_instance->p_libvlc_int, p_input_item );
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return 0;
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}
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/**************************************************************************
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* set_media (Public)
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**************************************************************************/
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void libvlc_media_list_set_media( libvlc_media_list_t * p_mlist,
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libvlc_media_t * p_md )
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{
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vlc_mutex_lock( &p_mlist->object_lock );
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libvlc_media_release( p_mlist->p_md );
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libvlc_media_retain( p_md );
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p_mlist->p_md = p_md;
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vlc_mutex_unlock( &p_mlist->object_lock );
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}
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/**************************************************************************
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* media (Public)
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*
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* If this media_list comes is a media's subitems,
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* This holds the corresponding media.
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* This md is also seen as the information holder for the media_list.
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* Indeed a media_list can have meta information through this
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* media.
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**************************************************************************/
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libvlc_media_t *
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libvlc_media_list_media( libvlc_media_list_t * p_mlist )
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{
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libvlc_media_t *p_md;
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vlc_mutex_lock( &p_mlist->object_lock );
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p_md = p_mlist->p_md;
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if( p_md )
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libvlc_media_retain( p_md );
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vlc_mutex_unlock( &p_mlist->object_lock );
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return p_md;
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}
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/**************************************************************************
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* libvlc_media_list_count (Public)
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*
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* Lock should be held when entering.
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**************************************************************************/
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int libvlc_media_list_count( libvlc_media_list_t * p_mlist )
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{
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return vlc_array_count( &p_mlist->items );
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}
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/**************************************************************************
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* libvlc_media_list_add_media (Public)
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*
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* Lock should be held when entering.
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**************************************************************************/
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int libvlc_media_list_add_media( libvlc_media_list_t * p_mlist,
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libvlc_media_t * p_md )
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{
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if( !mlist_is_writable(p_mlist) )
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return -1;
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_libvlc_media_list_add_media( p_mlist, p_md );
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return 0;
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}
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/* LibVLC internal version */
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void _libvlc_media_list_add_media( libvlc_media_list_t * p_mlist,
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libvlc_media_t * p_md )
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{
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libvlc_media_retain( p_md );
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notify_item_addition( p_mlist, p_md, vlc_array_count( &p_mlist->items ),
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EventWillHappen );
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vlc_array_append( &p_mlist->items, p_md );
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notify_item_addition( p_mlist, p_md, vlc_array_count( &p_mlist->items )-1,
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EventDidHappen );
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}
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/**************************************************************************
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* libvlc_media_list_insert_media (Public)
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*
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* Lock should be hold when entering.
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**************************************************************************/
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int libvlc_media_list_insert_media( libvlc_media_list_t * p_mlist,
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libvlc_media_t * p_md,
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int index )
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{
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if( !mlist_is_writable(p_mlist) )
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return -1;
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_libvlc_media_list_insert_media( p_mlist, p_md, index );
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return 0;
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}
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/* LibVLC internal version */
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void _libvlc_media_list_insert_media(
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libvlc_media_list_t * p_mlist,
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libvlc_media_t * p_md,
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int index )
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{
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libvlc_media_retain( p_md );
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notify_item_addition( p_mlist, p_md, index, EventWillHappen );
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vlc_array_insert( &p_mlist->items, p_md, index );
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notify_item_addition( p_mlist, p_md, index, EventDidHappen );
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}
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/**************************************************************************
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* libvlc_media_list_remove_index (Public)
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*
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* Lock should be held when entering.
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**************************************************************************/
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int libvlc_media_list_remove_index( libvlc_media_list_t * p_mlist,
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int index )
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{
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if( !mlist_is_writable(p_mlist) )
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return -1;
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return _libvlc_media_list_remove_index( p_mlist, index );
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}
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/* LibVLC internal version */
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int _libvlc_media_list_remove_index( libvlc_media_list_t * p_mlist,
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int index )
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{
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libvlc_media_t * p_md;
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if( index < 0 || index >= vlc_array_count( &p_mlist->items ))
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{
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libvlc_printerr( "Index out of bounds" );
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return -1;
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}
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p_md = vlc_array_item_at_index( &p_mlist->items, index );
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notify_item_deletion( p_mlist, p_md, index, EventWillHappen );
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vlc_array_remove( &p_mlist->items, index );
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notify_item_deletion( p_mlist, p_md, index, EventDidHappen );
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libvlc_media_release( p_md );
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return 0;
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}
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/**************************************************************************
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* libvlc_media_list_item_at_index (Public)
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*
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* Lock should be held when entering.
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**************************************************************************/
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libvlc_media_t *
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libvlc_media_list_item_at_index( libvlc_media_list_t * p_mlist,
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int index )
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{
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libvlc_media_t * p_md;
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if( index < 0 || index >= vlc_array_count( &p_mlist->items ))
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{
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libvlc_printerr( "Index out of bounds" );
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return NULL;
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}
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p_md = vlc_array_item_at_index( &p_mlist->items, index );
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libvlc_media_retain( p_md );
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return p_md;
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}
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/**************************************************************************
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* libvlc_media_list_index_of_item (Public)
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*
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* Lock should be held when entering.
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* Warning: this function returns the first matching item.
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**************************************************************************/
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int libvlc_media_list_index_of_item( libvlc_media_list_t * p_mlist,
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libvlc_media_t * p_searched_md )
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{
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libvlc_media_t * p_md;
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int i;
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for ( i = 0; i < vlc_array_count( &p_mlist->items ); i++ )
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{
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p_md = vlc_array_item_at_index( &p_mlist->items, i );
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if( p_searched_md == p_md )
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return i;
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}
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libvlc_printerr( "Media not found" );
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return -1;
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}
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/**************************************************************************
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* libvlc_media_list_is_readonly (Public)
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*
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* This indicates if this media list is read-only from a user point of view
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**************************************************************************/
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int libvlc_media_list_is_readonly( libvlc_media_list_t * p_mlist )
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{
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return p_mlist->b_read_only;
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}
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/**************************************************************************
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* libvlc_media_list_lock (Public)
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*
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* The lock must be held in access operations. It is never used in the
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* Public method.
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**************************************************************************/
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void libvlc_media_list_lock( libvlc_media_list_t * p_mlist )
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{
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vlc_mutex_lock( &p_mlist->object_lock );
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}
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/**************************************************************************
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* libvlc_media_list_unlock (Public)
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*
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* The lock must be held in access operations
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**************************************************************************/
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void libvlc_media_list_unlock( libvlc_media_list_t * p_mlist )
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{
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vlc_mutex_unlock( &p_mlist->object_lock );
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}
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/**************************************************************************
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* libvlc_media_list_p_event_manager (Public)
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*
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* The p_event_manager is immutable, so you don't have to hold the lock
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**************************************************************************/
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libvlc_event_manager_t *
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libvlc_media_list_event_manager( libvlc_media_list_t * p_mlist )
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{
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return p_mlist->p_event_manager;
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}
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