1/* 2 * Bink DSP routines 3 * Copyright (c) 2009 Konstantin Shishkov 4 * 5 * This file is part of FFmpeg. 6 * 7 * FFmpeg is free software; you can redistribute it and/or 8 * modify it under the terms of the GNU Lesser General Public 9 * License as published by the Free Software Foundation; either 10 * version 2.1 of the License, or (at your option) any later version. 11 * 12 * FFmpeg is distributed in the hope that it will be useful, 13 * but WITHOUT ANY WARRANTY; without even the implied warranty of 14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 15 * Lesser General Public License for more details. 16 * 17 * You should have received a copy of the GNU Lesser General Public 18 * License along with FFmpeg; if not, write to the Free Software 19 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 20 */ 21 22/** 23 * @file 24 * Bink DSP routines 25 */ 26 27#include "config.h" 28#include "libavutil/attributes.h" 29#include "binkdsp.h" 30 31#define A1 2896 /* (1/sqrt(2))<<12 */ 32#define A2 2217 33#define A3 3784 34#define A4 -5352 35 36#define MUL(X,Y) ((int)((unsigned)(X) * (Y)) >> 11) 37 38#define IDCT_TRANSFORM(dest,s0,s1,s2,s3,s4,s5,s6,s7,d0,d1,d2,d3,d4,d5,d6,d7,munge,src) {\ 39 const int a0 = (src)[s0] + (src)[s4]; \ 40 const int a1 = (src)[s0] - (src)[s4]; \ 41 const int a2 = (src)[s2] + (src)[s6]; \ 42 const int a3 = MUL(A1, (src)[s2] - (src)[s6]); \ 43 const int a4 = (src)[s5] + (src)[s3]; \ 44 const int a5 = (src)[s5] - (src)[s3]; \ 45 const int a6 = (src)[s1] + (src)[s7]; \ 46 const int a7 = (src)[s1] - (src)[s7]; \ 47 const int b0 = a4 + a6; \ 48 const int b1 = MUL(A3, a5 + a7); \ 49 const int b2 = MUL(A4, a5) - b0 + b1; \ 50 const int b3 = MUL(A1, a6 - a4) - b2; \ 51 const int b4 = MUL(A2, a7) + b3 - b1; \ 52 (dest)[d0] = munge(a0+a2 +b0); \ 53 (dest)[d1] = munge(a1+a3-a2+b2); \ 54 (dest)[d2] = munge(a1-a3+a2+b3); \ 55 (dest)[d3] = munge(a0-a2 -b4); \ 56 (dest)[d4] = munge(a0-a2 +b4); \ 57 (dest)[d5] = munge(a1-a3+a2-b3); \ 58 (dest)[d6] = munge(a1+a3-a2-b2); \ 59 (dest)[d7] = munge(a0+a2 -b0); \ 60} 61/* end IDCT_TRANSFORM macro */ 62 63#define MUNGE_NONE(x) (x) 64#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) 65 66#define MUNGE_ROW(x) (((x) + 0x7F)>>8) 67#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) 68 69static inline void bink_idct_col(int *dest, const int32_t *src) 70{ 71 if ((src[8]|src[16]|src[24]|src[32]|src[40]|src[48]|src[56])==0) { 72 dest[0] = 73 dest[8] = 74 dest[16] = 75 dest[24] = 76 dest[32] = 77 dest[40] = 78 dest[48] = 79 dest[56] = src[0]; 80 } else { 81 IDCT_COL(dest, src); 82 } 83} 84 85static void bink_idct_c(int32_t *block) 86{ 87 int i; 88 int temp[64]; 89 90 for (i = 0; i < 8; i++) 91 bink_idct_col(&temp[i], &block[i]); 92 for (i = 0; i < 8; i++) { 93 IDCT_ROW( (&block[8*i]), (&temp[8*i]) ); 94 } 95} 96 97static void bink_idct_add_c(uint8_t *dest, int linesize, int32_t *block) 98{ 99 int i, j; 100 101 bink_idct_c(block); 102 for (i = 0; i < 8; i++, dest += linesize, block += 8) 103 for (j = 0; j < 8; j++) 104 dest[j] += block[j]; 105} 106 107static void bink_idct_put_c(uint8_t *dest, int linesize, int32_t *block) 108{ 109 int i; 110 int temp[64]; 111 for (i = 0; i < 8; i++) 112 bink_idct_col(&temp[i], &block[i]); 113 for (i = 0; i < 8; i++) { 114 IDCT_ROW( (&dest[i*linesize]), (&temp[8*i]) ); 115 } 116} 117 118static void scale_block_c(const uint8_t src[64]/*align 8*/, uint8_t *dst/*align 8*/, int linesize) 119{ 120 int i, j; 121 uint16_t *dst1 = (uint16_t *) dst; 122 uint16_t *dst2 = (uint16_t *)(dst + linesize); 123 124 for (j = 0; j < 8; j++) { 125 for (i = 0; i < 8; i++) { 126 dst1[i] = dst2[i] = src[i] * 0x0101; 127 } 128 src += 8; 129 dst1 += linesize; 130 dst2 += linesize; 131 } 132} 133 134static void add_pixels8_c(uint8_t *av_restrict pixels, int16_t *block, 135 int line_size) 136{ 137 int i; 138 139 for (i = 0; i < 8; i++) { 140 pixels[0] += block[0]; 141 pixels[1] += block[1]; 142 pixels[2] += block[2]; 143 pixels[3] += block[3]; 144 pixels[4] += block[4]; 145 pixels[5] += block[5]; 146 pixels[6] += block[6]; 147 pixels[7] += block[7]; 148 pixels += line_size; 149 block += 8; 150 } 151} 152 153av_cold void ff_binkdsp_init(BinkDSPContext *c) 154{ 155 c->idct_add = bink_idct_add_c; 156 c->idct_put = bink_idct_put_c; 157 c->scale_block = scale_block_c; 158 c->add_pixels8 = add_pixels8_c; 159} 160