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/*
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 * Copyright (C) 2004 Michael Niedermayer <michaelni@gmx.at>
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 * Copyright (C) 2006 Robert Edele <yartrebo@earthlink.net>
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 *
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 * This file is part of FFmpeg.
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 *
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 * FFmpeg is free software; you can redistribute it and/or
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 * modify it under the terms of the GNU Lesser General Public
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 * License as published by the Free Software Foundation; either
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 * version 2.1 of the License, or (at your option) any later version.
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 *
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 * FFmpeg is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
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 * Lesser General Public License for more details.
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 *
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 * You should have received a copy of the GNU Lesser General Public
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 * License along with FFmpeg; if not, write to the Free Software
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 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
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 */
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#ifndef SNOW_H
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#define SNOW_H
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#include "dsputil.h"
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#define MID_STATE 128
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#define MAX_DECOMPOSITIONS 8
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#define MAX_PLANES 4
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#define QSHIFT 5
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#define QROOT (1<<QSHIFT)
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#define LOSSLESS_QLOG -128
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#define FRAC_BITS 8
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#define MAX_REF_FRAMES 8
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#define LOG2_OBMC_MAX 8
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#define OBMC_MAX (1<<(LOG2_OBMC_MAX))
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#define DWT_97 0
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#define DWT_53 1
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#define DWT_X  2
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/** Used to minimize the amount of memory used in order to optimize cache performance. **/
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struct slice_buffer_s {
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    DWTELEM * * line; ///< For use by idwt and predict_slices.
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    DWTELEM * * data_stack; ///< Used for internal purposes.
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    int data_stack_top;
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    int line_count;
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    int line_width;
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    int data_count;
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    DWTELEM * base_buffer; ///< Buffer that this structure is caching.
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};
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#define liftS lift
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#define lift5 lift
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#if 1
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#define W_AM 3
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#define W_AO 0
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#define W_AS 1
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#undef liftS
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#define W_BM 1
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#define W_BO 8
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#define W_BS 4
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#define W_CM 1
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#define W_CO 0
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#define W_CS 0
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#define W_DM 3
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#define W_DO 4
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#define W_DS 3
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#elif 0
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#define W_AM 55
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#define W_AO 16
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#define W_AS 5
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#define W_BM 3
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#define W_BO 32
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#define W_BS 6
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#define W_CM 127
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#define W_CO 64
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#define W_CS 7
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#define W_DM 7
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#define W_DO 8
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#define W_DS 4
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#elif 0
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#define W_AM 97
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#define W_AO 32
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#define W_AS 6
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#define W_BM 63
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#define W_BO 512
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#define W_BS 10
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#define W_CM 13
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#define W_CO 8
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#define W_CS 4
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#define W_DM 15
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#define W_DO 16
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#define W_DS 5
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#else
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#define W_AM 203
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#define W_AO 64
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#define W_AS 7
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#define W_BM 217
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#define W_BO 2048
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#define W_BS 12
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#define W_CM 113
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#define W_CO 64
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#define W_CS 7
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#define W_DM 227
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#define W_DO 128
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#define W_DS 9
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#endif
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extern void ff_snow_vertical_compose97i(DWTELEM *b0, DWTELEM *b1, DWTELEM *b2, DWTELEM *b3, DWTELEM *b4, DWTELEM *b5, int width);
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extern void ff_snow_horizontal_compose97i(DWTELEM *b, int width);
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extern void ff_snow_inner_add_yblock(const uint8_t *obmc, const int obmc_stride, uint8_t * * block, int b_w, int b_h, int src_x, int src_y, int src_stride, slice_buffer * sb, int add, uint8_t * dst8);
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#ifdef CONFIG_SNOW_ENCODER
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int w53_32_c(void *v, uint8_t * pix1, uint8_t * pix2, int line_size, int h);
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int w97_32_c(void *v, uint8_t * pix1, uint8_t * pix2, int line_size, int h);
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#else
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static int w53_32_c(void *v, uint8_t * pix1, uint8_t * pix2, int line_size, int h) {assert (0);}
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static int w97_32_c(void *v, uint8_t * pix1, uint8_t * pix2, int line_size, int h) {assert (0);}
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#endif
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/* C bits used by mmx/sse2/altivec */
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static av_always_inline void snow_interleave_line_header(int * i, int width, DWTELEM * low, DWTELEM * high){
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    (*i) = (width) - 2;
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    if (width & 1){
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        low[(*i)+1] = low[((*i)+1)>>1];
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        (*i)--;
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    }
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}
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static av_always_inline void snow_interleave_line_footer(int * i, DWTELEM * low, DWTELEM * high){
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    for (; (*i)>=0; (*i)-=2){
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        low[(*i)+1] = high[(*i)>>1];
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        low[*i] = low[(*i)>>1];
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    }
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}
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static av_always_inline void snow_horizontal_compose_lift_lead_out(int i, DWTELEM * dst, DWTELEM * src, DWTELEM * ref, int width, int w, int lift_high, int mul, int add, int shift){
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    for(; i<w; i++){
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        dst[i] = src[i] - ((mul * (ref[i] + ref[i + 1]) + add) >> shift);
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    }
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    if((width^lift_high)&1){
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        dst[w] = src[w] - ((mul * 2 * ref[w] + add) >> shift);
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    }
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}
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static av_always_inline void snow_horizontal_compose_liftS_lead_out(int i, DWTELEM * dst, DWTELEM * src, DWTELEM * ref, int width, int w){
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        for(; i<w; i++){
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            dst[i] = src[i] + ((ref[i] + ref[(i+1)]+W_BO + 4 * src[i]) >> W_BS);
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        }
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        if(width&1){
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            dst[w] = src[w] + ((2 * ref[w] + W_BO + 4 * src[w]) >> W_BS);
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        }
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}
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#endif