mirror of
https://code.videolan.org/videolan/vlc
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142 lines
3.8 KiB
C
142 lines
3.8 KiB
C
/*****************************************************************************
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* dynamicoverlay_list.c : dynamic overlay list
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*****************************************************************************
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* Copyright (C) 2008-2009 the VideoLAN team
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* $Id$
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*
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* Author: Søren Bøg <avacore@videolan.org>
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* Jean-Paul Saman <jpsaman@videolan.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 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 General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, 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 <vlc_common.h>
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#include <vlc_osd.h>
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#include <vlc_memory.h>
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#include "dynamicoverlay.h"
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/*****************************************************************************
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* list_t: Command queue
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*****************************************************************************/
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int ListInit( list_t *p_list )
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{
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p_list->pp_head = calloc( 16, sizeof( overlay_t * ) );
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if( p_list->pp_head == NULL )
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return VLC_ENOMEM;
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p_list->pp_tail = p_list->pp_head + 16;
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return VLC_SUCCESS;
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}
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int ListDestroy( list_t *p_list )
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{
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for( overlay_t **pp_cur = p_list->pp_head;
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pp_cur < p_list->pp_tail;
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++pp_cur )
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{
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if( *pp_cur != NULL )
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{
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OverlayDestroy( *pp_cur );
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free( *pp_cur );
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}
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}
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free( p_list->pp_head );
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return VLC_SUCCESS;
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}
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ssize_t ListAdd( list_t *p_list, overlay_t *p_new )
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{
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/* Find an available slot */
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for( overlay_t **pp_cur = p_list->pp_head;
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pp_cur < p_list->pp_tail;
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++pp_cur )
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{
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if( *pp_cur == NULL )
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{
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*pp_cur = p_new;
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return pp_cur - p_list->pp_head;
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}
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}
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/* Have to expand */
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size_t i_size = p_list->pp_tail - p_list->pp_head;
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size_t i_newsize = i_size * 2;
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p_list->pp_head = realloc_or_free( p_list->pp_head,
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i_newsize * sizeof( overlay_t * ) );
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if( p_list->pp_head == NULL )
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return VLC_ENOMEM;
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p_list->pp_tail = p_list->pp_head + i_newsize;
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memset( p_list->pp_head + i_size, 0, i_size * sizeof( overlay_t * ) );
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p_list->pp_head[i_size] = p_new;
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return i_size;
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}
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int ListRemove( list_t *p_list, size_t i_idx )
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{
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int ret;
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if( ( i_idx >= (size_t)( p_list->pp_tail - p_list->pp_head ) ) ||
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( p_list->pp_head[i_idx] == NULL ) )
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{
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return VLC_EGENERIC;
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}
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ret = OverlayDestroy( p_list->pp_head[i_idx] );
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free( p_list->pp_head[i_idx] );
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p_list->pp_head[i_idx] = NULL;
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return ret;
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}
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overlay_t *ListGet( list_t *p_list, size_t i_idx )
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{
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if( ( i_idx >= (size_t)( p_list->pp_tail - p_list->pp_head ) ) ||
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( p_list->pp_head[i_idx] == NULL ) )
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{
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return NULL;
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}
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return p_list->pp_head[i_idx];
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}
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overlay_t *ListWalk( list_t *p_list )
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{
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static overlay_t **pp_cur = NULL;
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if( pp_cur == NULL )
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pp_cur = p_list->pp_head;
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else
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pp_cur = pp_cur + 1;
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for( ; pp_cur < p_list->pp_tail; ++pp_cur )
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{
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if( ( *pp_cur != NULL ) &&
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( (*pp_cur)->b_active )&&
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( (*pp_cur)->format.i_chroma != VLC_FOURCC( '\0','\0','\0','\0') ) )
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{
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return *pp_cur;
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}
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}
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pp_cur = NULL;
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return NULL;
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}
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