/*
  * Copyright (C) 2004-2010 Michael Niedermayer <michaelni@gmx.at>
  *
  * 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_DIRAC_DWT_H
 #define AVCODEC_DIRAC_DWT_H
 
 #include <stdint.h>
 
 typedef int DWTELEM;
 typedef short IDWTELEM;
 
 #define MAX_DWT_SUPPORT 8
 #define MAX_DECOMPOSITIONS 8
 
 typedef struct DWTCompose {

     uint8_t *b[MAX_DWT_SUPPORT];

     int y;
 } DWTCompose;
 

 typedef struct DWTPlane {
     int width;
     int height;
     int stride;
     uint8_t *buf;
     uint8_t *buf_base;
     uint8_t *tmp;
 } DWTPlane;
 

 struct DWTContext;
 
 // Possible prototypes for vertical_compose functions

 typedef void (*vertical_compose_2tap)(uint8_t *b0, uint8_t *b1, int width);
 typedef void (*vertical_compose_3tap)(uint8_t *b0, uint8_t *b1, uint8_t *b2, int width);
 typedef void (*vertical_compose_5tap)(uint8_t *b0, uint8_t *b1, uint8_t *b2, uint8_t *b3, uint8_t *b4, int width);
 typedef void (*vertical_compose_9tap)(uint8_t *dst, uint8_t *b[8], int width);

 
 typedef struct DWTContext {

     uint8_t *buffer;
     uint8_t *temp;

     int width;
     int height;
     int stride;
     int decomposition_count;
     int support;
 
     void (*spatial_compose)(struct DWTContext *cs, int level, int width, int height, int stride);
     void (*vertical_compose_l0)(void);
     void (*vertical_compose_h0)(void);
     void (*vertical_compose_l1)(void);
     void (*vertical_compose_h1)(void);
     void (*vertical_compose)(void);     ///< one set of lowpass and highpass combined

     void (*horizontal_compose)(uint8_t *b, uint8_t *tmp, int width);

 
     DWTCompose cs[MAX_DECOMPOSITIONS];
 } DWTContext;
 
 enum dwt_type {
     DWT_SNOW_DAUB9_7,
     DWT_SNOW_LEGALL5_3,
     DWT_DIRAC_DD9_7,
     DWT_DIRAC_LEGALL5_3,
     DWT_DIRAC_DD13_7,
     DWT_DIRAC_HAAR0,
     DWT_DIRAC_HAAR1,
     DWT_DIRAC_FIDELITY,
     DWT_DIRAC_DAUB9_7,
     DWT_NUM_TYPES
 };
 
 // -1 if an error occurred, e.g. the dwt_type isn't recognized

 int ff_spatial_idwt_init(DWTContext *d, DWTPlane *p, enum dwt_type type,
                          int decomposition_count, int bit_depth);

 void ff_spatial_idwt_init_x86(DWTContext *d, enum dwt_type type);

 
 void ff_spatial_idwt_slice2(DWTContext *d, int y);
 

 // shared stuff for simd optimizations

 #define COMPOSE_53iL0(b0, b1, b2)\

     (b1 - ((int)(b0 + (unsigned)(b2) + 2) >> 2))

 
 #define COMPOSE_DIRAC53iH0(b0, b1, b2)\

     (b1 + ((int)(b0 + (unsigned)(b2) + 1) >> 1))

 
 #define COMPOSE_DD97iH0(b0, b1, b2, b3, b4)\

     (b2 + ((int)(-b0 + 9U*b1 + 9U*b3 - b4 + 8) >> 4))

 
 #define COMPOSE_DD137iL0(b0, b1, b2, b3, b4)\

     (b2 - ((int)(-b0 + 9U*b1 + 9U*b3 - b4 + 16) >> 5))

 
 #define COMPOSE_HAARiL0(b0, b1)\
     (b0 - ((b1 + 1) >> 1))
 
 #define COMPOSE_HAARiH0(b0, b1)\
     (b0 + b1)
 
 #define COMPOSE_FIDELITYiL0(b0, b1, b2, b3, b4, b5, b6, b7, b8)\

     ((unsigned)b4 - ((int)(-8*(b0+(unsigned)b8) + 21*(b1+(unsigned)b7) - 46*(b2+(unsigned)b6) + 161*(b3+(unsigned)b5) + 128) >> 8))

 
 #define COMPOSE_FIDELITYiH0(b0, b1, b2, b3, b4, b5, b6, b7, b8)\

     ((unsigned)b4 + ((int)(-2*(b0+(unsigned)b8) + 10*(b1+(unsigned)b7) - 25*(b2+(unsigned)b6) +  81*(b3+(unsigned)b5) + 128) >> 8))

 
 #define COMPOSE_DAUB97iL1(b0, b1, b2)\

     (b1 - ((int)(1817*(b0 + (unsigned)b2) + 2048) >> 12))

 
 #define COMPOSE_DAUB97iH1(b0, b1, b2)\

     (b1 - ((int)( 113*(b0 + (unsigned)b2) + 64) >> 7))

 
 #define COMPOSE_DAUB97iL0(b0, b1, b2)\

     (b1 + ((int)( 217*(b0 + (unsigned)b2) + 2048) >> 12))

 
 #define COMPOSE_DAUB97iH0(b0, b1, b2)\

     (b1 + ((int)(6497*(b0 + (unsigned)b2) + 2048) >> 12))

 
 
 #endif /* AVCODEC_DWT_H */