/* * Bink DSP routines * Copyright (c) 2009 Konstantin Shishkov * * 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 */ /** * @file * Bink DSP routines */ #include "libavutil/attributes.h"#include "binkdsp.h" #define A1  2896 /* (1/sqrt(2))<<12 */#define A2  2217#define A3  3784#define A4 -5352 #define MUL(X,Y) ((int)((unsigned)(X) * (Y)) >> 11) #define IDCT_TRANSFORM(dest,s0,s1,s2,s3,s4,s5,s6,s7,d0,d1,d2,d3,d4,d5,d6,d7,munge,src) {\    const int a0 = (src)[s0] + (src)[s4]; \    const int a1 = (src)[s0] - (src)[s4]; \    const int a2 = (src)[s2] + (src)[s6]; \    const int a3 = MUL(A1, (src)[s2] - (src)[s6]); \    const int a4 = (src)[s5] + (src)[s3]; \    const int a5 = (src)[s5] - (src)[s3]; \    const int a6 = (src)[s1] + (src)[s7]; \    const int a7 = (src)[s1] - (src)[s7]; \    const int b0 = a4 + a6; \    const int b1 = MUL(A3, a5 + a7); \    const int b2 = MUL(A4, a5) - b0 + b1; \    const int b3 = MUL(A1, a6 - a4) - b2; \    const int b4 = MUL(A2, a7) + b3 - b1; \    (dest)[d0] = munge(a0+a2   +b0); \    (dest)[d1] = munge(a1+a3-a2+b2); \    (dest)[d2] = munge(a1-a3+a2+b3); \    (dest)[d3] = munge(a0-a2   -b4); \    (dest)[d4] = munge(a0-a2   +b4); \    (dest)[d5] = munge(a1-a3+a2-b3); \    (dest)[d6] = munge(a1+a3-a2-b2); \    (dest)[d7] = munge(a0+a2   -b0); \}/* end IDCT_TRANSFORM macro */ #define MUNGE_NONE(x) (x)#define IDCT_COL(dest,src) IDCT_TRANSFORM(dest,0,8,16,24,32,40,48,56,0,8,16,24,32,40,48,56,MUNGE_NONE,src) #define MUNGE_ROW(x) (((x) + 0x7F)>>8)#define IDCT_ROW(dest,src) IDCT_TRANSFORM(dest,0,1,2,3,4,5,6,7,0,1,2,3,4,5,6,7,MUNGE_ROW,src) static inline void bink_idct_col(int *dest, const int32_t *src){    if ((src[8]|src[16]|src[24]|src[32]|src[40]|src[48]|src[56])==0) {        dest[0]  =        dest[8]  =        dest[16] =        dest[24] =        dest[32] =        dest[40] =        dest[48] =        dest[56] = src[0];    } else {        IDCT_COL(dest, src);    }} static void bink_idct_c(int32_t *block){    int i;    int temp[64];     for (i = 0; i < 8; i++)        bink_idct_col(&temp[i], &block[i]);    for (i = 0; i < 8; i++) {        IDCT_ROW( (&block[8*i]), (&temp[8*i]) );    }} static void bink_idct_add_c(uint8_t *dest, int linesize, int32_t *block){    int i, j;     bink_idct_c(block);    for (i = 0; i < 8; i++, dest += linesize, block += 8)        for (j = 0; j < 8; j++)             dest[j] += block[j];} static void bink_idct_put_c(uint8_t *dest, int linesize, int32_t *block){    int i;    int temp[64];    for (i = 0; i < 8; i++)        bink_idct_col(&temp[i], &block[i]);    for (i = 0; i < 8; i++) {        IDCT_ROW( (&dest[i*linesize]), (&temp[8*i]) );    }} static void scale_block_c(const uint8_t src[64]/*align 8*/, uint8_t *dst/*align 8*/, int linesize){    int i, j;    uint16_t *dst1 = (uint16_t *) dst;    uint16_t *dst2 = (uint16_t *)(dst + linesize);     for (j = 0; j < 8; j++) {        for (i = 0; i < 8; i++) {            dst1[i] = dst2[i] = src[i] * 0x0101;        }        src  += 8;        dst1 += linesize;        dst2 += linesize;    }} static void add_pixels8_c(uint8_t *restrict pixels, int16_t *block,                          int line_size){    int i;     for (i = 0; i < 8; i++) {        pixels[0] += block[0];        pixels[1] += block[1];        pixels[2] += block[2];        pixels[3] += block[3];        pixels[4] += block[4];        pixels[5] += block[5];        pixels[6] += block[6];        pixels[7] += block[7];        pixels    += line_size;        block     += 8;    }} av_cold void ff_binkdsp_init(BinkDSPContext *c){    c->idct_add    = bink_idct_add_c;    c->idct_put    = bink_idct_put_c;    c->scale_block = scale_block_c;    c->add_pixels8 = add_pixels8_c;}