mirror of
https://code.videolan.org/videolan/vlc
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433 lines
14 KiB
C
433 lines
14 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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*
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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_picture.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_atomic.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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/*
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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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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->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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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->event_manager, &event );
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}
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/* LibVLC internal */
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void libvlc_media_list_internal_end_reached( libvlc_media_list_t * p_mlist )
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{
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libvlc_event_t event;
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event.type = libvlc_MediaListEndReached;
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/* Send the event */
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libvlc_event_send( &p_mlist->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 *libvlc_media_list_new(void)
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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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libvlc_event_manager_init( &p_mlist->event_manager, p_mlist );
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p_mlist->b_read_only = false;
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vlc_mutex_init( &p_mlist->object_lock );
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vlc_atomic_rc_init( &p_mlist->rc );
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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->p_md = NULL;
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p_mlist->p_internal_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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if( !vlc_atomic_rc_dec( &p_mlist->rc ) )
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return;
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/* Refcount null, time to free */
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libvlc_event_manager_destroy( &p_mlist->event_manager );
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libvlc_media_release( p_mlist->p_md );
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for( size_t i = 0; i < vlc_array_count( &p_mlist->items ); i++ )
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{
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libvlc_media_t* 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_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_atomic_rc_inc( &p_mlist->rc );
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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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if( p_mlist->p_internal_md || !mlist_is_writable(p_mlist) )
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{
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vlc_mutex_unlock( &p_mlist->object_lock );
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return;
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}
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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_internal_md ? p_mlist->p_internal_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_internal_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_internal_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_or_abort( &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_internal_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_internal_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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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_or_abort( &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_internal_remove_index( p_mlist, index );
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}
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/* LibVLC internal version */
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int libvlc_media_list_internal_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( (size_t) 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( (size_t) 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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int idx = vlc_array_index_of_item( &p_mlist->items, p_searched_md );
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if( idx == -1 )
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libvlc_printerr( "Media not found" );
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return idx;
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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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bool 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_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->event_manager;
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}
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