Revision b42a03ff217eb757f5a79a2f71cfe9b59ad3c18d authored by Francois Cartegnie on 10 March 2016, 10:52:02 UTC, committed by Francois Cartegnie on 10 March 2016, 10:52:23 UTC
1 parent 994b93c
picture_fifo.c
/*****************************************************************************
* picture_fifo.c : picture fifo functions
*****************************************************************************
* Copyright (C) 2009 VLC authors and VideoLAN
* Copyright (C) 2009 Laurent Aimar <fenrir _AT_ videolan _DOT_ org>
* $Id$
*
* Authors: Laurent Aimar <fenrir _AT_ videolan _DOT_ org>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published by
* the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser 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.
*****************************************************************************/
/*****************************************************************************
* Preamble
*****************************************************************************/
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include <assert.h>
#include <vlc_common.h>
#include <vlc_picture_fifo.h>
/*****************************************************************************
*
*****************************************************************************/
struct picture_fifo_t {
vlc_mutex_t lock;
picture_t *first;
picture_t **last_ptr;
};
static void PictureFifoReset(picture_fifo_t *fifo)
{
fifo->first = NULL;
fifo->last_ptr = &fifo->first;
}
static void PictureFifoPush(picture_fifo_t *fifo, picture_t *picture)
{
assert(!picture->p_next);
*fifo->last_ptr = picture;
fifo->last_ptr = &picture->p_next;
}
static picture_t *PictureFifoPop(picture_fifo_t *fifo)
{
picture_t *picture = fifo->first;
if (picture) {
fifo->first = picture->p_next;
if (!fifo->first)
fifo->last_ptr = &fifo->first;
picture->p_next = NULL;
}
return picture;
}
picture_fifo_t *picture_fifo_New(void)
{
picture_fifo_t *fifo = malloc(sizeof(*fifo));
if (!fifo)
return NULL;
vlc_mutex_init(&fifo->lock);
PictureFifoReset(fifo);
return fifo;
}
void picture_fifo_Push(picture_fifo_t *fifo, picture_t *picture)
{
vlc_mutex_lock(&fifo->lock);
PictureFifoPush(fifo, picture);
vlc_mutex_unlock(&fifo->lock);
}
picture_t *picture_fifo_Pop(picture_fifo_t *fifo)
{
vlc_mutex_lock(&fifo->lock);
picture_t *picture = PictureFifoPop(fifo);
vlc_mutex_unlock(&fifo->lock);
return picture;
}
picture_t *picture_fifo_Peek(picture_fifo_t *fifo)
{
vlc_mutex_lock(&fifo->lock);
picture_t *picture = fifo->first;
if (picture)
picture_Hold(picture);
vlc_mutex_unlock(&fifo->lock);
return picture;
}
void picture_fifo_Flush(picture_fifo_t *fifo, mtime_t date, bool flush_before)
{
picture_t *picture;
vlc_mutex_lock(&fifo->lock);
picture = fifo->first;
PictureFifoReset(fifo);
picture_fifo_t tmp;
PictureFifoReset(&tmp);
while (picture) {
picture_t *next = picture->p_next;
picture->p_next = NULL;
if (( flush_before && picture->date <= date) ||
(!flush_before && picture->date >= date))
PictureFifoPush(&tmp, picture);
else
PictureFifoPush(fifo, picture);
picture = next;
}
vlc_mutex_unlock(&fifo->lock);
while ((picture = PictureFifoPop(&tmp)) != NULL)
picture_Release(picture);
}
void picture_fifo_OffsetDate(picture_fifo_t *fifo, mtime_t delta)
{
vlc_mutex_lock(&fifo->lock);
for (picture_t *picture = fifo->first; picture != NULL;) {
picture->date += delta;
picture = picture->p_next;
}
vlc_mutex_unlock(&fifo->lock);
}
void picture_fifo_Delete(picture_fifo_t *fifo)
{
picture_fifo_Flush(fifo, INT64_MAX, true);
vlc_mutex_destroy(&fifo->lock);
free(fifo);
}
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