1/* 2 * This file is part of FFmpeg. 3 * 4 * FFmpeg is free software; you can redistribute it and/or 5 * modify it under the terms of the GNU Lesser General Public 6 * License as published by the Free Software Foundation; either 7 * version 2.1 of the License, or (at your option) any later version. 8 * 9 * FFmpeg is distributed in the hope that it will be useful, 10 * but WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 12 * Lesser General Public License for more details. 13 * 14 * You should have received a copy of the GNU Lesser General Public 15 * License along with FFmpeg; if not, write to the Free Software 16 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA 17 */ 18 19#include "libavutil/attributes.h" 20#include "libavutil/common.h" 21#include "avcodec.h" 22#include "idctdsp.h" 23#include "mathops.h" 24#include "wmv2dsp.h" 25 26#define W0 2048 27#define W1 2841 /* 2048*sqrt (2)*cos (1*pi/16) */ 28#define W2 2676 /* 2048*sqrt (2)*cos (2*pi/16) */ 29#define W3 2408 /* 2048*sqrt (2)*cos (3*pi/16) */ 30#define W4 2048 /* 2048*sqrt (2)*cos (4*pi/16) */ 31#define W5 1609 /* 2048*sqrt (2)*cos (5*pi/16) */ 32#define W6 1108 /* 2048*sqrt (2)*cos (6*pi/16) */ 33#define W7 565 /* 2048*sqrt (2)*cos (7*pi/16) */ 34 35static void wmv2_idct_row(short * b) 36{ 37 int s1, s2; 38 int a0, a1, a2, a3, a4, a5, a6, a7; 39 40 /* step 1 */ 41 a1 = W1 * b[1] + W7 * b[7]; 42 a7 = W7 * b[1] - W1 * b[7]; 43 a5 = W5 * b[5] + W3 * b[3]; 44 a3 = W3 * b[5] - W5 * b[3]; 45 a2 = W2 * b[2] + W6 * b[6]; 46 a6 = W6 * b[2] - W2 * b[6]; 47 a0 = W0 * b[0] + W0 * b[4]; 48 a4 = W0 * b[0] - W0 * b[4]; 49 50 /* step 2 */ 51 s1 = (181 * (a1 - a5 + a7 - a3) + 128) >> 8; // 1, 3, 5, 7 52 s2 = (181 * (a1 - a5 - a7 + a3) + 128) >> 8; 53 54 /* step 3 */ 55 b[0] = (a0 + a2 + a1 + a5 + (1 << 7)) >> 8; 56 b[1] = (a4 + a6 + s1 + (1 << 7)) >> 8; 57 b[2] = (a4 - a6 + s2 + (1 << 7)) >> 8; 58 b[3] = (a0 - a2 + a7 + a3 + (1 << 7)) >> 8; 59 b[4] = (a0 - a2 - a7 - a3 + (1 << 7)) >> 8; 60 b[5] = (a4 - a6 - s2 + (1 << 7)) >> 8; 61 b[6] = (a4 + a6 - s1 + (1 << 7)) >> 8; 62 b[7] = (a0 + a2 - a1 - a5 + (1 << 7)) >> 8; 63} 64 65static void wmv2_idct_col(short * b) 66{ 67 int s1, s2; 68 int a0, a1, a2, a3, a4, a5, a6, a7; 69 70 /* step 1, with extended precision */ 71 a1 = (W1 * b[8 * 1] + W7 * b[8 * 7] + 4) >> 3; 72 a7 = (W7 * b[8 * 1] - W1 * b[8 * 7] + 4) >> 3; 73 a5 = (W5 * b[8 * 5] + W3 * b[8 * 3] + 4) >> 3; 74 a3 = (W3 * b[8 * 5] - W5 * b[8 * 3] + 4) >> 3; 75 a2 = (W2 * b[8 * 2] + W6 * b[8 * 6] + 4) >> 3; 76 a6 = (W6 * b[8 * 2] - W2 * b[8 * 6] + 4) >> 3; 77 a0 = (W0 * b[8 * 0] + W0 * b[8 * 4] ) >> 3; 78 a4 = (W0 * b[8 * 0] - W0 * b[8 * 4] ) >> 3; 79 80 /* step 2 */ 81 s1 = (181 * (a1 - a5 + a7 - a3) + 128) >> 8; 82 s2 = (181 * (a1 - a5 - a7 + a3) + 128) >> 8; 83 84 /* step 3 */ 85 b[8 * 0] = (a0 + a2 + a1 + a5 + (1 << 13)) >> 14; 86 b[8 * 1] = (a4 + a6 + s1 + (1 << 13)) >> 14; 87 b[8 * 2] = (a4 - a6 + s2 + (1 << 13)) >> 14; 88 b[8 * 3] = (a0 - a2 + a7 + a3 + (1 << 13)) >> 14; 89 90 b[8 * 4] = (a0 - a2 - a7 - a3 + (1 << 13)) >> 14; 91 b[8 * 5] = (a4 - a6 - s2 + (1 << 13)) >> 14; 92 b[8 * 6] = (a4 + a6 - s1 + (1 << 13)) >> 14; 93 b[8 * 7] = (a0 + a2 - a1 - a5 + (1 << 13)) >> 14; 94} 95 96static void wmv2_idct_add_c(uint8_t *dest, int line_size, int16_t *block) 97{ 98 int i; 99 100 for (i = 0; i < 64; i += 8) 101 wmv2_idct_row(block + i); 102 for (i = 0; i < 8; i++) 103 wmv2_idct_col(block + i); 104 105 for (i = 0; i < 8; i++) { 106 dest[0] = av_clip_uint8(dest[0] + block[0]); 107 dest[1] = av_clip_uint8(dest[1] + block[1]); 108 dest[2] = av_clip_uint8(dest[2] + block[2]); 109 dest[3] = av_clip_uint8(dest[3] + block[3]); 110 dest[4] = av_clip_uint8(dest[4] + block[4]); 111 dest[5] = av_clip_uint8(dest[5] + block[5]); 112 dest[6] = av_clip_uint8(dest[6] + block[6]); 113 dest[7] = av_clip_uint8(dest[7] + block[7]); 114 dest += line_size; 115 block += 8; 116 } 117} 118 119static void wmv2_idct_put_c(uint8_t *dest, int line_size, int16_t *block) 120{ 121 int i; 122 123 for (i = 0; i < 64; i += 8) 124 wmv2_idct_row(block + i); 125 for (i = 0; i < 8; i++) 126 wmv2_idct_col(block + i); 127 128 for (i = 0; i < 8; i++) { 129 dest[0] = av_clip_uint8(block[0]); 130 dest[1] = av_clip_uint8(block[1]); 131 dest[2] = av_clip_uint8(block[2]); 132 dest[3] = av_clip_uint8(block[3]); 133 dest[4] = av_clip_uint8(block[4]); 134 dest[5] = av_clip_uint8(block[5]); 135 dest[6] = av_clip_uint8(block[6]); 136 dest[7] = av_clip_uint8(block[7]); 137 dest += line_size; 138 block += 8; 139 } 140} 141 142static void wmv2_mspel8_h_lowpass(uint8_t *dst, uint8_t *src, 143 int dstStride, int srcStride, int h) 144{ 145 const uint8_t *cm = ff_crop_tab + MAX_NEG_CROP; 146 int i; 147 148 for (i = 0; i < h; i++) { 149 dst[0] = cm[(9 * (src[0] + src[1]) - (src[-1] + src[2]) + 8) >> 4]; 150 dst[1] = cm[(9 * (src[1] + src[2]) - (src[0] + src[3]) + 8) >> 4]; 151 dst[2] = cm[(9 * (src[2] + src[3]) - (src[1] + src[4]) + 8) >> 4]; 152 dst[3] = cm[(9 * (src[3] + src[4]) - (src[2] + src[5]) + 8) >> 4]; 153 dst[4] = cm[(9 * (src[4] + src[5]) - (src[3] + src[6]) + 8) >> 4]; 154 dst[5] = cm[(9 * (src[5] + src[6]) - (src[4] + src[7]) + 8) >> 4]; 155 dst[6] = cm[(9 * (src[6] + src[7]) - (src[5] + src[8]) + 8) >> 4]; 156 dst[7] = cm[(9 * (src[7] + src[8]) - (src[6] + src[9]) + 8) >> 4]; 157 dst += dstStride; 158 src += srcStride; 159 } 160} 161 162static void wmv2_mspel8_v_lowpass(uint8_t *dst, uint8_t *src, 163 int dstStride, int srcStride, int w) 164{ 165 const uint8_t *cm = ff_crop_tab + MAX_NEG_CROP; 166 int i; 167 168 for (i = 0; i < w; i++) { 169 const int src_1 = src[-srcStride]; 170 const int src0 = src[0]; 171 const int src1 = src[srcStride]; 172 const int src2 = src[2 * srcStride]; 173 const int src3 = src[3 * srcStride]; 174 const int src4 = src[4 * srcStride]; 175 const int src5 = src[5 * srcStride]; 176 const int src6 = src[6 * srcStride]; 177 const int src7 = src[7 * srcStride]; 178 const int src8 = src[8 * srcStride]; 179 const int src9 = src[9 * srcStride]; 180 dst[0 * dstStride] = cm[(9 * (src0 + src1) - (src_1 + src2) + 8) >> 4]; 181 dst[1 * dstStride] = cm[(9 * (src1 + src2) - (src0 + src3) + 8) >> 4]; 182 dst[2 * dstStride] = cm[(9 * (src2 + src3) - (src1 + src4) + 8) >> 4]; 183 dst[3 * dstStride] = cm[(9 * (src3 + src4) - (src2 + src5) + 8) >> 4]; 184 dst[4 * dstStride] = cm[(9 * (src4 + src5) - (src3 + src6) + 8) >> 4]; 185 dst[5 * dstStride] = cm[(9 * (src5 + src6) - (src4 + src7) + 8) >> 4]; 186 dst[6 * dstStride] = cm[(9 * (src6 + src7) - (src5 + src8) + 8) >> 4]; 187 dst[7 * dstStride] = cm[(9 * (src7 + src8) - (src6 + src9) + 8) >> 4]; 188 src++; 189 dst++; 190 } 191} 192 193static void put_mspel8_mc10_c(uint8_t *dst, uint8_t *src, ptrdiff_t stride) 194{ 195 uint8_t half[64]; 196 197 wmv2_mspel8_h_lowpass(half, src, 8, stride, 8); 198 ff_put_pixels8_l2_8(dst, src, half, stride, stride, 8, 8); 199} 200 201static void put_mspel8_mc20_c(uint8_t *dst, uint8_t *src, ptrdiff_t stride) 202{ 203 wmv2_mspel8_h_lowpass(dst, src, stride, stride, 8); 204} 205 206static void put_mspel8_mc30_c(uint8_t *dst, uint8_t *src, ptrdiff_t stride) 207{ 208 uint8_t half[64]; 209 210 wmv2_mspel8_h_lowpass(half, src, 8, stride, 8); 211 ff_put_pixels8_l2_8(dst, src + 1, half, stride, stride, 8, 8); 212} 213 214static void put_mspel8_mc02_c(uint8_t *dst, uint8_t *src, ptrdiff_t stride) 215{ 216 wmv2_mspel8_v_lowpass(dst, src, stride, stride, 8); 217} 218 219static void put_mspel8_mc12_c(uint8_t *dst, uint8_t *src, ptrdiff_t stride) 220{ 221 uint8_t halfH[88]; 222 uint8_t halfV[64]; 223 uint8_t halfHV[64]; 224 225 wmv2_mspel8_h_lowpass(halfH, src - stride, 8, stride, 11); 226 wmv2_mspel8_v_lowpass(halfV, src, 8, stride, 8); 227 wmv2_mspel8_v_lowpass(halfHV, halfH + 8, 8, 8, 8); 228 ff_put_pixels8_l2_8(dst, halfV, halfHV, stride, 8, 8, 8); 229} 230 231static void put_mspel8_mc32_c(uint8_t *dst, uint8_t *src, ptrdiff_t stride) 232{ 233 uint8_t halfH[88]; 234 uint8_t halfV[64]; 235 uint8_t halfHV[64]; 236 237 wmv2_mspel8_h_lowpass(halfH, src - stride, 8, stride, 11); 238 wmv2_mspel8_v_lowpass(halfV, src + 1, 8, stride, 8); 239 wmv2_mspel8_v_lowpass(halfHV, halfH + 8, 8, 8, 8); 240 ff_put_pixels8_l2_8(dst, halfV, halfHV, stride, 8, 8, 8); 241} 242 243static void put_mspel8_mc22_c(uint8_t *dst, uint8_t *src, ptrdiff_t stride) 244{ 245 uint8_t halfH[88]; 246 247 wmv2_mspel8_h_lowpass(halfH, src - stride, 8, stride, 11); 248 wmv2_mspel8_v_lowpass(dst, halfH + 8, stride, 8, 8); 249} 250 251av_cold void ff_wmv2dsp_init(WMV2DSPContext *c) 252{ 253 c->idct_add = wmv2_idct_add_c; 254 c->idct_put = wmv2_idct_put_c; 255 c->idct_perm = FF_NO_IDCT_PERM; 256 257 c->put_mspel_pixels_tab[0] = ff_put_pixels8x8_c; 258 c->put_mspel_pixels_tab[1] = put_mspel8_mc10_c; 259 c->put_mspel_pixels_tab[2] = put_mspel8_mc20_c; 260 c->put_mspel_pixels_tab[3] = put_mspel8_mc30_c; 261 c->put_mspel_pixels_tab[4] = put_mspel8_mc02_c; 262 c->put_mspel_pixels_tab[5] = put_mspel8_mc12_c; 263 c->put_mspel_pixels_tab[6] = put_mspel8_mc22_c; 264 c->put_mspel_pixels_tab[7] = put_mspel8_mc32_c; 265} 266