/*
  * Copyright (c) 2015 Kieran Kunhya
  *
  * 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_CFHD_H
 #define AVCODEC_CFHD_H
 
 #include <stdint.h>
 
 #include "libavutil/avassert.h"
 
 #include "avcodec.h"
 #include "get_bits.h"

 #include "vlc.h"

 #define VLC_BITS       9
 #define SUBBAND_COUNT 10

 
 typedef struct CFHD_RL_VLC_ELEM {
     int16_t level;
     int8_t len;
     uint16_t run;
 } CFHD_RL_VLC_ELEM;
 
 #define DWT_LEVELS 3
 
 typedef struct SubBand {
     int level;
     int orientation;

     ptrdiff_t stride;

     int a_width;
     int width;
     int a_height;
     int height;
     int pshift;
     int quant;
     uint8_t *ibuf;
 } SubBand;
 
 typedef struct Plane {
     int width;
     int height;
     ptrdiff_t stride;
 
     int16_t *idwt_buf;
     int16_t *idwt_tmp;
 
     /* TODO: merge this into SubBand structure */

     int16_t *subband[SUBBAND_COUNT];

     int16_t *l_h[8];
 
     SubBand band[DWT_LEVELS][4];
 } Plane;
 
 typedef struct CFHDContext {
     AVCodecContext *avctx;
 
     CFHD_RL_VLC_ELEM table_9_rl_vlc[2088];
     VLC vlc_9;
 
     CFHD_RL_VLC_ELEM table_18_rl_vlc[4572];
     VLC vlc_18;
 
     GetBitContext gb;
 
     int coded_width;
     int coded_height;

     int cropped_height;

     enum AVPixelFormat coded_format;

 
     int a_width;
     int a_height;

     int a_format;

     int bpc; // bits per channel/component

     int channel_cnt;
     int subband_cnt;
     int channel_num;
     uint8_t lowpass_precision;
     uint16_t quantisation;
     int wavelet_depth;
     int pshift;
 
     int codebook;
     int subband_num;
     int level;
     int subband_num_actual;
 
     uint8_t prescale_shift[3];
     Plane plane[4];
 } CFHDContext;
 
 int ff_cfhd_init_vlcs(CFHDContext *s);
 
 #endif /* AVCODEC_CFHD_H */