/*
  * Intel MediaSDK QSV utility functions
  *
  * copyright (c) 2013 Luca Barbato
  *

  * This file is part of FFmpeg.

  *

  * FFmpeg 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.
  *

  * FFmpeg 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 FFmpeg; if not, write to the Free Software

  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
  */
 

 #ifndef AVCODEC_QSVDEC_H
 #define AVCODEC_QSVDEC_H

 
 #include <stdint.h>
 #include <sys/types.h>
 
 #include <mfx/mfxvideo.h>
 

 #include "libavutil/fifo.h"

 #include "libavutil/frame.h"
 #include "libavutil/pixfmt.h"
 
 #include "avcodec.h"

 #include "qsv_internal.h"

 
 typedef struct QSVContext {
     // the session used for decoding
     mfxSession session;
 
     // the session we allocated internally, in case the caller did not provide
     // one

     QSVSession internal_qs;

 
     /**
      * a linked list of frames currently being used by QSV
      */
     QSVFrame *work_frames;
 

     AVFifoBuffer *async_fifo;

     AVFifoBuffer *input_fifo;

     // we should to buffer input packets at some cases
     // else it is not possible to handle dynamic stream changes correctly
     // this fifo uses for input packets buffering
     AVFifoBuffer *pkt_fifo;
 

     // this flag indicates that header parsed,
     // decoder instance created and ready to general decoding
     int engine_ready;
 

     // we can not just re-init decoder if different sequence header arrived
     // we should to deliver all buffered frames but we can not decode new packets
     // this time. So when reinit_pending is non-zero we flushing decoder and
     // accumulate new arrived packets into pkt_fifo
     int reinit_pending;
 

     // options set by the caller
     int async_depth;
     int iopattern;
 

     char *load_plugins;
 

     mfxExtBuffer **ext_buffers;
     int         nb_ext_buffers;
 } QSVContext;
 
 int ff_qsv_map_pixfmt(enum AVPixelFormat format);
 
 int ff_qsv_decode(AVCodecContext *s, QSVContext *q,
                   AVFrame *frame, int *got_frame,
                   AVPacket *avpkt);
 

 void ff_qsv_decode_reset(AVCodecContext *avctx, QSVContext *q);
 

 int ff_qsv_decode_close(QSVContext *q);

 #endif /* AVCODEC_QSVDEC_H */