/*
  * 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_INTRAX8_H
 #define AVCODEC_INTRAX8_H

 #include "blockdsp.h"

 #include "get_bits.h"

 #include "idctdsp.h"

 #include "intrax8dsp.h"

 #include "wmv2dsp.h"

 #include "mpegpicture.h"

 typedef struct IntraX8Context {

     VLC *j_ac_vlc[4]; // they point to the static j_mb_vlc
     VLC *j_orient_vlc;
     VLC *j_dc_vlc[3];

 
     int use_quant_matrix;

 
     // set by ff_intrax8_common_init
     uint8_t *prediction_table; // 2 * (mb_w * 2)

     ScanTable scantable[3];

     WMV2DSPContext wdsp;
     uint8_t idct_permutation[64];

     AVCodecContext *avctx;

     int *block_last_index;  ///< last nonzero coefficient in block
     int16_t (*block)[64];

 
     // set by the caller codec

     IntraX8DSPContext dsp;

     IDCTDSPContext idsp;

     BlockDSPContext bdsp;

     int quant;
     int dquant;
     int qsum;

     int loopfilter;

     AVFrame *frame;

     GetBitContext *gb;

 
     // calculated per frame

     int quant_dc_chroma;
     int divide_quant_dc_luma;
     int divide_quant_dc_chroma;

     uint8_t *dest[3];

     uint8_t scratchpad[42]; // size of the block is fixed (8x8 plus padding)

 
     // changed per block

     int edges;
     int flat_dc;
     int predicted_dc;
     int raw_orient;
     int chroma_orient;
     int orient;
     int est_run;

 
     // block props
     int mb_x, mb_y;
     int mb_width, mb_height;

 } IntraX8Context;
 

 /**
  * Initialize IntraX8 frame decoder.

  * @param avctx pointer to AVCodecContext

  * @param w pointer to IntraX8Context

  * @param idsp pointer to IDCTDSPContext

  * @param block pointer to block array
  * @param block_last_index pointer to index array

  * @param mb_width macroblock width
  * @param mb_height macroblock height

  * @return 0 on success, a negative AVERROR value on error

  */

 int ff_intrax8_common_init(AVCodecContext *avctx,
                            IntraX8Context *w, IDCTDSPContext *idsp,

                            int16_t (*block)[64],
                            int block_last_index[12],

                            int mb_width, int mb_height);

 
 /**
  * Destroy IntraX8 frame structure.
  * @param w pointer to IntraX8Context
  */

 void ff_intrax8_common_end(IntraX8Context *w);

 
 /**
  * Decode single IntraX8 frame.

  * lowres decoding is theoretically impossible.

  * @param w pointer to IntraX8Context

  * @param pict the output Picture containing an AVFrame

  * @param gb open bitstream reader

  * @param mb_x pointer to the x coordinate of the current macroblock
  * @param mb_y pointer to the y coordinate of the current macroblock

  * @param dquant doubled quantizer, it would be odd in case of VC-1 halfpq==1.
  * @param quant_offset offset away from zero

  * @param loopfilter enable filter after decoding a block

  */

 int ff_intrax8_decode_picture(IntraX8Context *w, Picture *pict,

                               GetBitContext *gb, int *mb_x, int *mb_y,

                               int quant, int halfpq,
                               int loopfilter, int lowdelay);

 #endif /* AVCODEC_INTRAX8_H */