/*
  * Canopus HQX decoder
  *

  * 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_HQX_H
 #define AVCODEC_HQX_H
 
 #include <stdint.h>

 
 #include "libavutil/frame.h"

 #include "libavutil/mem.h"
 #include "get_bits.h"

 #include "hqxdsp.h"

 
 enum HQXACMode {
     HQX_AC_Q0 = 0,
     HQX_AC_Q8,
     HQX_AC_Q16,
     HQX_AC_Q32,
     HQX_AC_Q64,
     HQX_AC_Q128,
     NUM_HQX_AC
 };
 
 typedef struct HQXLUT {
     int16_t lev;
     uint8_t run;
     int8_t  bits;
 } HQXLUT;
 
 typedef struct HQXAC {
     int lut_bits, extra_bits;
     const HQXLUT *lut;
 } HQXAC;
 

 struct HQXContext;
 

 typedef int (*mb_decode_func)(struct HQXContext *ctx,
                               int slice_no, int x, int y);
 
 typedef struct HQXSlice {
     GetBitContext gb;
     DECLARE_ALIGNED(16, int16_t, block)[16][64];
 } HQXSlice;

 typedef struct HQXContext {

     HQXDSPContext hqxdsp;

     HQXSlice slice[16];

     AVFrame *pic;
     mb_decode_func decode_func;
 

     int format, dcb, width, height;
     int interlaced;
 

     uint8_t *src;
     unsigned int data_size;
     uint32_t slice_off[17];
 

     VLC cbp_vlc;
     VLC dc_vlc[3];
 } HQXContext;
 
 #define HQX_DC_VLC_BITS 9
 
 extern const HQXAC ff_hqx_ac[NUM_HQX_AC];
 
 int ff_hqx_init_vlcs(HQXContext *ctx);
 
 #endif /* AVCODEC_HQX_H */