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/*
* Copyright (C) 2004 Michael Niedermayer <michaelni@gmx.at>
* Copyright (C) 2006 Robert Edele <yartrebo@earthlink.net>
*
* 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 SNOW_H
#define SNOW_H
#include "dsputil.h"
#define MID_STATE 128
#define MAX_DECOMPOSITIONS 8
#define MAX_PLANES 4
#define QSHIFT 5
#define QROOT (1<<QSHIFT)
#define LOSSLESS_QLOG -128
#define FRAC_BITS 8
#define MAX_REF_FRAMES 8
#define LOG2_OBMC_MAX 8
#define OBMC_MAX (1<<(LOG2_OBMC_MAX))
#define DWT_97 0
#define DWT_53 1
#define DWT_X 2
/** Used to minimize the amount of memory used in order to optimize cache performance. **/
struct slice_buffer_s {
DWTELEM * * line; ///< For use by idwt and predict_slices.
DWTELEM * * data_stack; ///< Used for internal purposes.
int data_stack_top;
int line_count;
int line_width;
int data_count;
DWTELEM * base_buffer; ///< Buffer that this structure is caching.
};
#define liftS lift
#define lift5 lift
#if 1
#define W_AM 3
#define W_AO 0
#define W_AS 1
#undef liftS
#define W_BM 1
#define W_BO 8
#define W_BS 4
#define W_CM 1
#define W_CO 0
#define W_CS 0
#define W_DM 3
#define W_DO 4
#define W_DS 3
#elif 0
#define W_AM 55
#define W_AO 16
#define W_AS 5
#define W_BM 3
#define W_BO 32
#define W_BS 6
#define W_CM 127
#define W_CO 64
#define W_CS 7
#define W_DM 7
#define W_DO 8
#define W_DS 4
#elif 0
#define W_AM 97
#define W_AO 32
#define W_AS 6
#define W_BM 63
#define W_BO 512
#define W_BS 10
#define W_CM 13
#define W_CO 8
#define W_CS 4
#define W_DM 15
#define W_DO 16
#define W_DS 5
#else
#define W_AM 203
#define W_AO 64
#define W_AS 7
#define W_BM 217
#define W_BO 2048
#define W_BS 12
#define W_CM 113
#define W_CO 64
#define W_CS 7
#define W_DM 227
#define W_DO 128
#define W_DS 9
#endif
extern void ff_snow_vertical_compose97i(DWTELEM *b0, DWTELEM *b1, DWTELEM *b2, DWTELEM *b3, DWTELEM *b4, DWTELEM *b5, int width);
extern void ff_snow_horizontal_compose97i(DWTELEM *b, int width);
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);
#ifdef CONFIG_SNOW_ENCODER
int w53_32_c(void *v, uint8_t * pix1, uint8_t * pix2, int line_size, int h);
int w97_32_c(void *v, uint8_t * pix1, uint8_t * pix2, int line_size, int h);
#else
static int w53_32_c(void *v, uint8_t * pix1, uint8_t * pix2, int line_size, int h) {assert (0);}
static int w97_32_c(void *v, uint8_t * pix1, uint8_t * pix2, int line_size, int h) {assert (0);}
#endif
/* C bits used by mmx/sse2/altivec */
static av_always_inline void snow_interleave_line_header(int * i, int width, DWTELEM * low, DWTELEM * high){
(*i) = (width) - 2;
if (width & 1){
low[(*i)+1] = low[((*i)+1)>>1];
(*i)--;
}
}
static av_always_inline void snow_interleave_line_footer(int * i, DWTELEM * low, DWTELEM * high){
for (; (*i)>=0; (*i)-=2){
low[(*i)+1] = high[(*i)>>1];
low[*i] = low[(*i)>>1];
}
}
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){
for(; i<w; i++){
dst[i] = src[i] - ((mul * (ref[i] + ref[i + 1]) + add) >> shift);
}
if((width^lift_high)&1){
dst[w] = src[w] - ((mul * 2 * ref[w] + add) >> shift);
}
}
static av_always_inline void snow_horizontal_compose_liftS_lead_out(int i, DWTELEM * dst, DWTELEM * src, DWTELEM * ref, int width, int w){
for(; i<w; i++){
dst[i] = src[i] + ((ref[i] + ref[(i+1)]+W_BO-1 + 4 * src[i]) >> W_BS);
}
if(width&1){
dst[w] = src[w] + ((2 * ref[w] + W_BO-1 + 4 * src[w]) >> W_BS);
}
}
#endif
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