PeerStreamer

/*

 * 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(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) - 4 * src[i]) >> W_BS);

        }

        if(width&1){

            dst[w] = src[w] - (((-2 * ref[w] + W_BO) - 4 * src[w]) >> W_BS);

        }

}

#endif