include/vlc_picture_fifo.h

   1 /*****************************************************************************
   2  * vlc_picture_fifo.h: picture fifo definitions
   3  *****************************************************************************
   4  * Copyright (C) 2009 VLC authors and VideoLAN
   5  *
   6  * Authors: Laurent Aimar <fenrir _AT_ videolan _DOT_ org>
   7  *
   8  * This program is free software; you can redistribute it and/or modify it
   9  * under the terms of the GNU Lesser General Public License as published by
  10  * the Free Software Foundation; either version 2.1 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  16  * GNU Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public License
  19  * along with this program; if not, write to the Free Software Foundation,
  20  * Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301, USA.
  21  *****************************************************************************/
  22
  23 #ifndef VLC_PICTURE_FIFO_H
  24 #define VLC_PICTURE_FIFO_H 1
  25
  26 /**
  27  * \file
  28  * This file defines picture fifo structures and functions in vlc
  29  */
  30
  31 #include <vlc_picture.h>
  32
  33 /**
  34  * Picture fifo handle
  35  *
  36  * It is thread safe (push/pop).
  37  */
  38 typedef struct picture_fifo_t picture_fifo_t;
  39
  40 /**
  41  * It creates an empty picture_fifo_t.
  42  */
  43 VLC_API picture_fifo_t * picture_fifo_New( void ) VLC_USED;
  44
  45 /**
  46  * It destroys a fifo created by picture_fifo_New.
  47  *
  48  * All pictures inside the fifo will be released by picture_Release.
  49  */
  50 VLC_API void picture_fifo_Delete( picture_fifo_t * );
  51
  52 /**
  53  * It retreives a picture_t from the fifo.
  54  *
  55  * If the fifo is empty, it return NULL without waiting.
  56  */
  57 VLC_API picture_t * picture_fifo_Pop( picture_fifo_t * ) VLC_USED;
  58
  59 /**
  60  * It returns the first picture_t pointer from the fifo but does not
  61  * remove it. The picture returned has been hold for you so you
  62  * must call picture_Release on it.
  63  *
  64  * If the fifo is empty, it return NULL without waiting.
  65  */
  66 VLC_API picture_t * picture_fifo_Peek( picture_fifo_t * ) VLC_USED;
  67
  68 /**
  69  * It saves a picture_t into the fifo.
  70  */
  71 VLC_API void picture_fifo_Push( picture_fifo_t *, picture_t * );
  72
  73 /**
  74  * It release all picture inside the fifo that have a lower or equal date
  75  * if flush_before or higher or equal to if not flush_before than the given one.
  76  * Passing VLC_TICK_INVALID on the date releases all the pictures.
  77  *
  78  * All pictures inside the fifo will be released by picture_Release.
  79  */
  80 VLC_API void picture_fifo_Flush( picture_fifo_t *, vlc_tick_t date, bool flush_before );
  81
  82 /**
  83  * It applies a delta on all the picture timestamp.
  84  */
  85 VLC_API void picture_fifo_OffsetDate( picture_fifo_t *, vlc_tick_t delta );
  86
  87
  88 #endif /* VLC_PICTURE_FIFO_H */
  89