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113 lines
3.0 KiB
113 lines
3.0 KiB
/*****************************************************************************
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* dynamicoverlay_queue.c : dynamic overlay plugin commands
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*****************************************************************************
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* Copyright (C) 2008-2009 VLC authors and VideoLAN
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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 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 <vlc_common.h>
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#include "dynamicoverlay.h"
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/*****************************************************************************
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* queue_t: Command queue
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*****************************************************************************/
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int QueueInit( queue_t *p_queue )
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{
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memset( p_queue, 0, sizeof( queue_t ) );
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p_queue->p_head = NULL;
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p_queue->p_tail = NULL;
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return VLC_SUCCESS;
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}
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int QueueDestroy( queue_t *p_queue )
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{
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command_t *p_cur = p_queue->p_head, *p_temp;
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while( p_cur != NULL )
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{
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p_temp = p_cur;
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p_cur = p_cur->p_next;
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free( p_temp );
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}
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p_queue->p_head = NULL;
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p_queue->p_tail = NULL;
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return VLC_SUCCESS;
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}
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int QueueEnqueue( queue_t *p_queue, command_t *p_cmd )
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{
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if( p_queue->p_tail != NULL )
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{
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p_queue->p_tail->p_next = p_cmd;
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}
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if( p_queue->p_head == NULL )
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{
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p_queue->p_head = p_cmd;
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}
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p_queue->p_tail = p_cmd;
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p_cmd->p_next = NULL;
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return VLC_SUCCESS;
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}
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command_t *QueueDequeue( queue_t *p_queue )
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{
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if( p_queue->p_head == NULL )
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{
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return NULL;
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}
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else
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{
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command_t *p_ret = p_queue->p_head;
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if( p_queue->p_head == p_queue->p_tail )
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{
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p_queue->p_head = p_queue->p_tail = NULL;
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}
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else
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{
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p_queue->p_head = p_queue->p_head->p_next;
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}
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return p_ret;
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}
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}
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int QueueTransfer( queue_t *p_sink, queue_t *p_source )
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{
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if( p_source->p_head == NULL ) {
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return VLC_SUCCESS;
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}
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if( p_sink->p_head == NULL ) {
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p_sink->p_head = p_source->p_head;
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p_sink->p_tail = p_source->p_tail;
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} else {
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p_sink->p_tail->p_next = p_source->p_head;
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p_sink->p_tail = p_source->p_tail;
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}
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p_source->p_head = p_source->p_tail = NULL;
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return VLC_SUCCESS;
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}
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