Commit 39321c06 authored by Laurent Aimar's avatar Laurent Aimar

Added a picture_fifo_t helper.

parent a1cd0034
/*****************************************************************************
* vlc_picture_fifo.h: picture fifo definitions
*****************************************************************************
* Copyright (C) 2009 the VideoLAN team
* $Id$
*
* 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 General Public License as published by
* the Free Software Foundation; either version 2 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 General Public License for more details.
*
* You should have received a copy of the GNU 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.
*****************************************************************************/
#ifndef VLC_PICTURE_FIFO_H
#define VLC_PICTURE_FIFO_H 1
/**
* \file
* This file defines picture fifo structures and functions in vlc
*/
#include <vlc_picture.h>
/**
* Picture fifo handle
*
* It is thread safe (push/pop).
*/
typedef struct picture_fifo_t picture_fifo_t;
/**
* It creates an empty picture_fifo_t.
*/
VLC_EXPORT( picture_fifo_t *, picture_fifo_New, ( void ) LIBVLC_USED );
/**
* It destroys a fifo created by picture_fifo_New.
*
* All pictures inside the fifo will be released by picture_Release.
*/
VLC_EXPORT( void, picture_fifo_Delete, ( picture_fifo_t * ) );
/**
* It retreives a picture_t from the fifo.
*
* If the fifo is empty, it return NULL without waiting.
*/
VLC_EXPORT( picture_t *, picture_fifo_Pop, ( picture_fifo_t * ) LIBVLC_USED );
/**
* It returns the first picture_t pointer from the fifo but does not
* remove it. The picture returned has been hold for you so you
* must call picture_Release on it.
*
* If the fifo is empty, it return NULL without waiting.
*/
VLC_EXPORT( picture_t *, picture_fifo_Peek, ( picture_fifo_t * ) LIBVLC_USED );
/**
* It saves a picture_t into the fifo.
*/
VLC_EXPORT( void, picture_fifo_Push, ( picture_fifo_t *, picture_t * ) );
/**
* It release all picture inside the fifo that have a lower or equal date
* if b_below or higher or equal to not b_below than the given one.
*
* All pictures inside the fifo will be released by picture_Release.
*/
VLC_EXPORT( void, picture_fifo_Flush, ( picture_fifo_t *, mtime_t i_date, bool b_below ) );
/**
* It applies a delta on all the picture timestamp.
*/
VLC_EXPORT( void, picture_fifo_OffsetDate, ( picture_fifo_t *, mtime_t i_delta ) );
#endif /* VLC_PICTURE_FIFO_H */
......@@ -276,6 +276,13 @@ path_sanitize
picture_CopyPixels
picture_Delete
picture_Export
picture_fifo_Delete
picture_fifo_Flush
picture_fifo_New
picture_fifo_OffsetDate
picture_fifo_Peek
picture_fifo_Pop
picture_fifo_Push
picture_New
picture_Reset
picture_Setup
......
......@@ -38,6 +38,7 @@
#include <vlc_filter.h>
#include <vlc_image.h>
#include <vlc_block.h>
#include <vlc_picture_fifo.h>
#include "vout_pictures.h"
#include "vout_internal.h"
......@@ -1070,3 +1071,119 @@ int picture_Export( vlc_object_t *p_obj,
/*****************************************************************************
*
*****************************************************************************/
struct picture_fifo_t
{
vlc_mutex_t lock;
picture_t *p_first;
picture_t **pp_last;
};
static void PictureFifoReset( picture_fifo_t *p_fifo )
{
p_fifo->p_first = NULL;
p_fifo->pp_last = &p_fifo->p_first;
}
static void PictureFifoPush( picture_fifo_t *p_fifo, picture_t *p_picture )
{
assert( !p_picture->p_next );
*p_fifo->pp_last = p_picture;
p_fifo->pp_last = &p_picture->p_next;
}
static picture_t *PictureFifoPop( picture_fifo_t *p_fifo )
{
picture_t *p_picture = p_fifo->p_first;
if( p_picture )
{
p_fifo->p_first = p_picture->p_next;
if( !p_fifo->p_first )
p_fifo->pp_last = &p_fifo->p_first;
}
return p_picture;
}
picture_fifo_t *picture_fifo_New(void)
{
picture_fifo_t *p_fifo = malloc( sizeof(*p_fifo) );
if( !p_fifo )
return NULL;
vlc_mutex_init( &p_fifo->lock );
PictureFifoReset( p_fifo );
return p_fifo;
}
void picture_fifo_Push( picture_fifo_t *p_fifo, picture_t *p_picture )
{
vlc_mutex_lock( &p_fifo->lock );
PictureFifoPush( p_fifo, p_picture );
vlc_mutex_unlock( &p_fifo->lock );
}
picture_t *picture_fifo_Pop( picture_fifo_t *p_fifo )
{
vlc_mutex_lock( &p_fifo->lock );
picture_t *p_picture = PictureFifoPop( p_fifo );
vlc_mutex_unlock( &p_fifo->lock );
return p_picture;
}
picture_t *picture_fifo_Peek( picture_fifo_t *p_fifo )
{
vlc_mutex_lock( &p_fifo->lock );
picture_t *p_picture = p_fifo->p_first;
if( p_picture )
picture_Hold( p_picture );
vlc_mutex_unlock( &p_fifo->lock );
return p_picture;
}
void picture_fifo_Flush( picture_fifo_t *p_fifo, mtime_t i_date, bool b_below )
{
picture_t *p_picture;
vlc_mutex_lock( &p_fifo->lock );
p_picture = p_fifo->p_first;
PictureFifoReset( p_fifo );
picture_fifo_t tmp;
PictureFifoReset( &tmp );
while( p_picture )
{
picture_t *p_next = p_picture->p_next;
p_picture->p_next = NULL;
if( ( b_below && p_picture->date <= i_date ) ||
( !b_below && p_picture->date >= i_date ) )
PictureFifoPush( &tmp, p_picture );
else
PictureFifoPush( p_fifo, p_picture );
p_picture = p_next;
}
vlc_mutex_unlock( &p_fifo->lock );
for( ;; )
{
picture_t *p_picture = PictureFifoPop( &tmp );
if( !p_picture )
break;
picture_Release( p_picture );
}
}
void picture_fifo_OffsetDate( picture_fifo_t *p_fifo, mtime_t i_delta )
{
vlc_mutex_lock( &p_fifo->lock );
for( picture_t *p_picture = p_fifo->p_first; p_picture != NULL; )
{
p_picture->date += i_delta;
p_picture = p_picture->p_next;
}
vlc_mutex_unlock( &p_fifo->lock );
}
void picture_fifo_Delete( picture_fifo_t *p_fifo )
{
picture_fifo_Flush( p_fifo, INT64_MAX, true );
vlc_mutex_destroy( &p_fifo->lock );
}
Markdown is supported
0% or .
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment